Emerson Fisher V260 Brochure
Contents
1. 16 Fisher Pulp and Paper Solutions Pulping Medium Consistency Pump Discharge Medium consistency pumping dry solid content between 8 18 and chemical mixing systems are the most important stock transfer equipment in the modern oxygen delignification and bleaching processes with recycled fiber and in mechanical pulp lines These valves can be used in two distinct ways with variable speed pumps the valve is run at full 90 degrees open and with static head pumps the valve needs to be throttled Restrictions in the flow path can discourage appropriate process flow and cause decreases in throughput Additionally high vibration can cause serious damage to piping and supporting structures around the stock pumps creating production delays and safety issues Product Solutions OPTIMAL FLOW PATH Expanded outlet provides optimal flow path for pulp slurry CUSTOM CONFIGURATION Body configuration accommodates medium consistency pump piping requirements REDUCED INSTALLATION TIME Flanged valve body design reduces alignment and installation time MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic for maximum flow control EXTENDED SERVICE LIFE Heavy duty valve bearings and PTFE packing extend service life capabilities SMALL ACTUATOR PROFILE Actuator design promotes smaller envelope package size for tight spaces POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in2. You can find replicator parts for Fisher control valves actuators and instruments from a variety of sources but using non OEM parts puts your facility at risk Non OEM parts can result in higher costs for additional parts and may cause lost production and downtime thus affecting your profitability Although these replicator parts may initially cost you less you may pay more in the long run Fisher Pulp and Paper Solutions 7 Click on the QR code to find D the sales office nearest you wg ck ES K SE er t EE Os od La d i E WT g on e g A a D r A D Service Emerson provides your projects and facilities with the instrument and electrical technicians to guide you through comprehensive startups troubleshooting repair and maintenance services We can mobilize our technicians to any location in the world to help your company achieve its goals All technicians obtain training and education at specialized colleges and institutes This training coupled with practical field experience in various industries will provide your company with the highest quality of expertise in the instrumentation and electrical field as well as designated trade certifications and engineering technologies 8 Fisher Pulp and Paper Solutions Cooking 1 Caustic Addition 2 Digester Liquor Level Control 3 Digester Switching 4 Digester Blow 5 Gas Relief Pulping 6 Brown Stock Rejects J Medium Consistency Pump Discharg
3. Pulp and Paper Solutions Power and Steam Cycle Boiler Feedwater Startup and Regulating In the normal range of plant operation the boiler feedwater regulator experiences high flow rates with low differential pressure However during startup this valve experiences low flow rates with very high differential pressure which can cause severe cavitation damage Some feedwater systems are designed using one valve to handle startup and normal operating conditions Others are designed using a separate small startup valve to handle low flow cavitating conditions and a second larger valve to handle high flow rates required for normal operation Boiler Feedpump Recirculation The boiler feedpump recirculation valve faces some of the toughest conditions of any control valve in a power plant The boiler feedpump takes its suction from the deaerator at relatively low pressure and increases the pressure to approximately 10 above the main steam pressure During startup or low load conditions flow to the boiler may not be adequate to meet the minimum flow requirements of the boiler feedpump Boiler feedpump recirculation valves protect the feedpump by ensuring adequate flow is passing through the pump at all times These valves will experience extreme cavitation caused by high temperatures and pressure drops Product Solutions m MAXIMUM FLOW CONTROL Pneumatic actuation provides highly accurate step positioning and stable valve response m FLOW RESPONSE
4. Water flange connections offer high rangeability for excellent system control m HIGH TEMPERATURE CAPABILITIES Materials and design are suitable for temperatures up to 593 C 1100 F m EXTENDED SERVICE LIFE Some insertion style attemperators use vortex shedding technology to minimize vibration and extend service life m TEMPERATURE CONTROL Variable geometry spray nozzles ensure complete mixing and rapid vaporization of spraywater Fisher DMA AF HTC Insertion Style Desuperheater gel o _ Du Q T r o D A lt al D If you found this brochure valuable may we also recommend the following literature 4 http www Facebook com FisherValves Hl http www YouTube com user FisherControlValve Le http www Twitter com FisherValves Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 18087 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore www EmersonProcess com Fisher D351985X012 MX98 H oni Fisher Pulp amp Paper Sourcebook Fisher Power Solutions Control valves engineered to improve your plant performance Document Number D103540X012 www EmersonProcess com Fisher Documentation Fisher Vee Ball Rotary Control Valves Document Number D350004X012 www EmersonProcess com Fisher Documentation Fisher Technology Development Brochure Document Number D351843X012 www EmersonProcess com Fis
5. by reason of one very loud event a series of loud events or days weeks and years of loud noise in a work or recreational environment Noise created by cavitation flowing slurries steam or even fluid leaking past a closed orifice can create an environment that is unsafe for personnel for extended periods of time Regulatory agencies detail the maximum permissible sound levels and occupational exposure beyond which mitigation measures and personal protective equipment are required In the past simply presuming hearing protection would be provided was enough Today not providing engineered controls is deemed an unacceptable work practice Designing and incorporating noise mitigation techniques can include complex procedures and are often handled as a separate design discipline Noise can be found anywhere in a facility or in a control valve and must be taken into account Detailed sound level predictions are often required during the facility s design phase and regulatory compliance sound level measurements are often required immediately after plant commissioning Facility health and safety engineers are employed to pinpoint noisy processes and equipment and explore mitigation techniques to lessen the noise Emerson design engineers continually research noise mitigation technologies and bring Fisher technology solutions to a noisy world It is imperative when working with your Emerson local business partner or sales office to rev
6. high vibration Fisher V150E Expanded Outlet Vee Ball control valve 2052 actuator and FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 17 Bleaching Chlorine Dioxide Addition After digestion end products that are required to be whitened go to the bleach plant Chlorine dioxide has rapidly become the industry standard bleaching agent because of its selectivity in destroying pulp lignin without degrading cellulosic fibers thus preserving pulp strength and providing stable brightness Modern mills typically have pulp stock enter the oxygen delignification stage before the medium consistency pulp heads to the conventional bleaching sequence These can vary from four to six separate stages depending on the end user s requirements A standard mill would utilize a DEgpDED sequence or an alternating sequence of chlorine dioxide D alkaline extraction stages E oxygen O and peroxide P brightening stage This alternating sequence of chlorine dioxide and alkaline help to break down the increasingly smaller amounts of residual lignin This valve is subjected to high corrosion due to the chlorine dioxide material and accurate control is necessary because of the high costs of chemicals Product Solutions m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic m ZEROLOST MOTION Splined driveshaft and shaft to ball pinning allows for tight control m LONG SERVICE LIFE Rugged seal and bea
7. 70 degrees of operation m ZEROLOST MOTION Splined driveshaft and shaft to disk pinning allows for tight control m MAXIMUM FLOW CONTROL Disk provides equal percent characteristic for improved throttling range m PIPELINE ORIENTATION Spring loaded shaft for either vertical or horizontal valve orientation m SMALL ACTUATOR PROFILE Actuator profile promotes smaller envelope package size for tight spaces m POSITIONER FEEDBACK Linkage less and non contact feedback improved reliability in high vibration applications RE Fisher Control Disk rotary valve 2052 actuator and FIELDVUE DVC6200 5 ER Ee D D A D 24 Fisher Pulp and Paper Solutions 1 Boiler Feedwater Startup 2 Boiler Feedwater Regulating 3 Boiler Feedwater Recirculating 4 Sootblower 5 Sky Vent 6 Main Steam Pressure Reducing Valve 7 Turbine Bypass Fisher Pulp and Paper Solutions 25 Steam Cycle Process High Pressure Steam Heacher Tur arpa seg C r talnt Genentor AMechum Freenure Cream Hiig Hecoera 3 i 7 Papier i lo Proce SS i d To Picea Low Pressure Stan Hendi Longbonzate Netw From in Sewer hrocess A Lorrie deed i Make up Viale Degreator Contlerrncet Seance Hemer Storage Tank Lira Prisar steam Web PT a I P rhea Dr WW K a U gt d E o weed Ku gel o A 26 Fisher
8. EDUCTION Available trim technologies to ensure the safety of personnel and meeting regulatory requirements reduces vibration and mechanical noise and maintains valve plug stability m TIGHT SHUTOFF Advanced sealing technology provides tight shutoff and extends valve s service life m STEAM CONDITIONING Integral spraywater nozzles engineered for your steam requirements m EASE OF MAINTENANCE Valve can remain in pipeline during removal of trim parts for inspection or maintenance m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher TBX steam conditioning control valve and 585 CLS actuator Fisher Pulp and Paper Solutions 31 Power and Steam Cycle Steam Conditioning As with any superheated steam cycle the temperature of the superheat needs to be controlled to ensure that it does not exceed the material limits of the process equipment Temperature control is accomplished by use of an attemperator or desuperheater that injects a controlled amount of cooling water into the superheated steam flow Ring and insertion style attemperators are designed to work in conjunction with supporting superheat and reheat control valves This system prevents damage to the process equipment and extends its service life Some attemperators use anti flashing nozzles to provide the required amount of water needed for accurate temperature control Product Solutions m HIGH RANGEABILITY
9. INTENANCE Flanged valve body reduces alignment and installation time m SMALL ACTUATOR PROFILE Actuator profile promotes smaller envelope package size for tight spaces m POSITIONER FEEDBACK Linkage less and non contact feedback provides valve position accuracy and improves reliability FIELDVUE Fisher V150 Vee Ball control valve 2052 actuator and FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 23 Paper Machine Vacuum Box After the pulp stock is sprayed on the forming fabric the sheet is still very wet and must be removed A vacuum box or flatbox under the forming fabric helps to remove the excess water These valves help to control the amount of vacuum being pulled on the sheet and can have a big effect on the rest of the paper machine Poor control in the forming section can lead to problems with end product consistency and formation leading to off spec product Dryer Steam and Condensate Return After water is removed from the sheet via vacuum and the press section of the paper machine heat is applied to evaporate the remaining water to the desired paper dryness Steam is sent to large diameter steam heated cylinders to provide the necessary heat and the resulting condensate must be returned to the mill s boiler feedwater system Correct steam and thereby heat is important to ensure end product is at the correct dryness and on specification Product Solutions m CONTROL RANGE Expanded butterfly control range of 15
10. KEU CO a SCHieGule Tue Cooking liquor sodium hydroxide NaOH solution is a caustic chemical used with sodium sulfide to create white liquor This fluid is used to break down the lignin that binds cellulosic fibers while in the digester Digesting is the process of removing lignin and other non fibrous components of the wood from the cellulose fibers which are used to make paper Lignin is essentially the glue that holds the wood fibers together It can rapidly decompose and discolor paper if it is left in the pulp To retain end product quality it is imperative lignin is removed Sodium hydroxide is a highly used chemical that requires accurate addition to the wood chips Poor control can lead to economic loss in sodium hydroxide solution and can also lead to wood chip degradation Product Solutions m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic for maximum flow control m MINIMAL LOST MOTION Clamped driveshaft ensures minimal lost motion allowing for tight control m TIGHT SHUTOFF Heavy duty seal provides tight shutoff m EASE OF MAINTENANCE Drop in place installation for easy maintenance m REDUCED INSTALLATION TIME Flanged valve body design reduces alignment and installation time m SMALL ACTUATOR PROFILE Actuator design promotes smaller envelope package size for tight spaces Fisher V150 Vee Ball control valve FieldQ actuator and FIELDVUE DVC2000 digital valve controller Fish
11. LDVUE DVC6200 Fisher Pulp and Paper Solutions 15 Pulping Brown Stock Rejects Pulp from cooking always contains some unwanted solid material Some of the fibrous material may not be completely in the form of individual fibers The main purpose of the pulp screening process is to separate harmful impurities from pulp with minimal fiber loss and at an acceptable cost level Bark sand shives and rocks are typically found within the cooked chips and must be removed It is important for these impurities to be removed from the process stream as it can have negative effects on end product quality may damage downstream process equipment and may cause operational problems Product Solutions m WASH OUT PROTECTION Reverse flow installation ensures erosive slurries remain downstream of valve body and trim m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic for maximum flow control m VALVEBODY PROTECTION Hard wear resistant trim materials fully protect valve body shaft and bearings m HARDENED MATERIALS High Chrome Iron HCI and or Partially Stabilized Zirconia PSZ MATERIAL protect body internals m EASE OF MAINTENANCE Valve body design allows for easy replacement of trim and valve internals m MINIMIZED IMPINGEMENT Flow ring matched to pipe bore size minimizes impingement on pipe wall FIELOVUE Fisher V150S Slurry Vee Ball control valve 2052 actuator and FIELDVUE DVC6200
12. Optional accessories ensure quick step valve positioning for precise throughput and control m FLOW THROUGHPUT Valve design ensures high turndown even in extreme flowrates m TIGHT SHUTOFF Advanced sealing technology provides tight shutoff and extends valve s service life m CAVITATION MITIGATION Provides low flow cavitation protection during startup and standard operation and reduces vibration and noise m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration applications Fisher EH control valve 585C actuator FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 27 Power and Steam Cycle Sootblower In the power and recovery boiler firing fuels such as coal oil or other waste products cause degradation of the boiler tubes Deposits from the combustion process can collect on the heat exchanging tubes which reduces thermal efficiency and may cause operational problems Sootblower valves provide steam to the sootblower system to remove deposits from the boiler tubes and must withstand high pressure high vibration and thermal cycling to maintain unit efficiency Product Solutions m HIGH PRESSURE CAPABILITIES Rugged design and valve options allow for a multitude of pressure class ratings m HIGH TEMPERATURE OPTIONS Customized soot blower trim provides high temperature capabilities reduces noise and withstands both heavy vibration and thermal cycling m EXTENDED SERVICE LIFE Wear re
13. Reliable control valve technologies for on specification product N EMERSON 2 Fisher Pulp and Paper Solutions Discover the Right Solution for You The pulp and paper industry in recent years has seen some difficult times However it s likely that no other manufactured product plays a more significant role in daily human activity than paper products Paper provides the means to recording and disseminating most of today s information news and data From the brochure you re reading now to the newspaper you read this morning paper is used for many purposes and it will remain this way for many years to come The uses and applications of paper and paper products are truly vast and new products are constantly being developed At the same time the industry itself faces much competition The key to remaining competitive today is to adopt and maintain reliable technologies to keep your mill operating at peak performance levels To do so you need control valves and technologies that stand up to even the most adverse conditions like erosive slurries scaling noise and vibration while maintaining tight loop control Please use this brochure as a guide to discovering the breadth of best in class Fisher control valve solutions that offer new levels of performance and reliability to your mill and keep your mill operating at its full potential Papermaking Overview The Process of Papermaking Although not present at a
14. SITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration FIELDVUE TH EE Ep Fisher V500 control valve 2052 actuator and FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 21 Paper Machine Paper Additives Prior to stock entering the headbox various additives are combined with the pulp during stock preparation For instance the combination of rosin size and aluminum sulfate resists penetration by fluids and is critical for ink printing operation Other agents and starches help increase the paper s internal strength Fillers such as precipitated calcium carbonate PCC and titanium dioxide help with paper brightness opacity and smoothness of paper All agents must be added precisely to pulp stock so the end product meets the particular needs of an end user Special consideration must be given because of the low flow and sometimes erosiveness of certain chemicals such as titanium dioxide and PCC Product Solutions m LOW FLOW CONTROL Optional V notch ball allows for a wide range of low flow control options m EROSION CONTROL V notch ball made in a variety of materials for erosive applications m ZEROLOST MOTION Splined driveshaft and shaft to ball pinning allows for tight control m EXTENDED SERVICE LIFE Heavy duty seal and rugged bearing design are robustly designed for extended service m EASE OF MAINTENANCE Low friction bearings with minimal friction provide optimal control and dro
15. Valves control the circulating liquor as it travels from the screens lining the interior of the digester to the circulation pump through the heat exchanger and returns the liquor to the digester cooking zone This application generally consists of two loops one for both the upper and lower cooking zones Switching valves are also commonly found in the digester s extraction or wash zone Here wash filtrate is added to the bottom of the digester with counter current flow to the chip mass As the wash fluid extracts the used cooking liquors valves remove the wash fluid for further processing These valves frequently see high cycling high temperatures high pressures and corrosive chemicals Product Solutions m EXTENDED SERVICE LIFE PTFE packing and heavy duty valve bearings extend service life capabilities m ZERO LOST MOTION Splined shaft and taper pin disk connections provide tight control m INCREASED FLOW CAPACITY Contoured disk increases flow capacity while reducing operating torque m EMISSION CONTROL Superior sealing and ENVIRO SEAL packing reduces emissions m EASY INSTALLATION Centering holes and line flange bolts reduces valve centering issues for easy installation Fisher DSV High Performance Eccentric Disk Digester Switching Valve with 1061 actuator Fisher Pulp and Paper Solutions 13 Cooking Digester Blow After the wood chips are sufficiently cooked they must be discharged from the digester Digester blo
16. agement
17. but it may also cause material damage excessive noise and high vibration This material damage can severely affect the control valve s operability and overall control loop performance This valve plug has sustained extensive cavitation damage It shows a complete loss of seating surfaces Click on the QR code to view the Fisher View an animation video on cavitation at www FisherSevereService com Cavitation Control Technologies brochure 6 Fisher Pulp and Paper Solutions Optimize Your Process Maximize Your Profitability Control Valve Selection and Design Selecting a control valve is more of an art than a science Clearly a single product design is not sufficient for the wide variation of applications across the entire pulp and paper process Emerson uses multiple approaches to address application specific issues Industry experience by application damaging effects of the papermaking process cavitation science and the effect of control valve size type trim style geometry and materials are all critical to providing reliable solutions Special considerations may require out of the ordinary control valve solutions There are Fisher control valve designs and special trims available to handle high noise applications flashing cavitation high pressure high temperature erosive processes and combinations of these conditions Using Fisher technology for your tough papermaking applications is the best way to ach
18. ck and lime mud can severely erode the internals of control valves thus minimizing the service life of the product In some cases the erosion is severe enough to cause pressure boundary parts to become unstable This is a safety risk to the mill Appropriate material selection is necessary to ensure long lasting products and to maximize uptime Scaling also known as fouling is common in boilers and heat exchangers operating with hard water that can often result in lime scale In addition scaling can be found in the digester due to white liquor the evaporator and concentrator units due to black liquor or the recausticizing process due to green liquor and lime mud This can cause flow instabilities increase pressure drops induce vibrations that lead to high noise and a large number of other unanticipated problems Finally corrosion is prevalent throughout the paper mill Material selections are highly important to ensure long lasting products in each particular service It is important to work with your Emerson local business partner or sales office to choose the correct products to minimize risk A fully equipped materials lab is staffed by Emerson technologists who verify that materials and coatings will perform to expectations Excessive Noise and Vibration Noise control is crucial to achieving compliance with environmental and workplace regulations High noise levels can be a serious health risk and can cause hearing damage
19. e Bleaching 8 Chlorine Dioxide Addition 13 a 9 Black Liquor Evaporation 10 Black Liquor Guns Ni 1 Green Liquor Dissolving Tank Density 1 2 White Liquor Pressure Filter Switching 13 Lime Mud Underflow Paper Machine 14 Paper Additives 15 Basis Weight 16 Vacuum Box 17 Dryer Steam and Condensate Return Fisher Pulp and Paper Solutions 9 Papermaking Process Woot Ai las Gas Digester Heliet T a D Lei 2 Aleryy Kngptter Watt Screens 6 CIarber Tank White 3 l Llais m Wasted Pulp Vatbnrs 12 Recowery Cautious aallar SIPAT Virak Hi ch Ligu D oarmm Lei Greer White liii Piai atc enk ft Carter d NOtOT OIOTz Green Loupe Shaker Washing Wih ap B A Chiarina KH Ching Wt Coustii Digaidie en Dioxide em Sodi Chiaje Are Stege 8 d Stage 8 Laut 2 Chiari hot oxide Kopp oxide lower Tikini Tower Joer j SSS ee ee T ee eee eee eee mi Dloechupng Met Regita Press Heart sacii ryer Calendar Strien Va GC Osi Ge ebe 1 6 1 Fi biniahod ia 1 1 on 15 rie EK AR a Confer pate creii Basis Foc pit Weight Veh tee Warner Pit Chest Valve 10 Fisher Pulp and Paper Solutions Cooking Caustic Addition Chips are fed via a screwfeeder into the top of a digester where it is mixed with cooking liyuur Wiel CUO
20. e recovery boiler flows by gravity to the dissolving tank Here it is mixed with weak wash to a solution suitable for pumping known as green liquor Two valves in parallel control the density of the dissolving tank Green liquor has a tendency to scale and can bind the internals of the control valve body Product Solutions m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic m ZEROLOST MOTION Splined driveshaft and shaft to ball pinning allows for tight control m EXTENDED SERVICE LIFE Heavy duty seal and rugged bearing design are robustly designed for extended service m EASE OF MAINTENANCE Bearings provide optimal control and drop in for easy maintenance m REDUCED MAINTENANCE Flanged valve body reduces alignment and installation time m SMALL ACTUATOR PROFILE Actuator design promotes smaller envelope package size for tight spaces m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher V150 Vee Ball control valve 2052 actuator and FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 19 Recovery White Liquor Pressure Filter Switching The white liquor pressure filter is the preferred method for separating white liquor slurry into its primary components of white liquor and lime mud This slurry is pumped through the feed valve into the filter vessel where the fluid is forced through a filter The solid lime mud cannot pass thro
21. ed by a valve that is subjected to corrosion due to high black liquor content Additionally this valve must precisely control the black liquor flow as this can directly affect the recovery boiler s burning and steam generation efficiency Lime Mud Underflow Once lime mud is removed via the pressure filter it is washed to remove any residual chemicals and sent to a settling tank Here the lime mud settles to the bottom of the tank and exits via an underflow valve while the washing fluid called weak wash overflows from the top The underflow valve is throttled to control mud density which directly impacts the operation and efficiency of the lime kiln The valve must be made of wear resistant materials due to the extremely erosive nature of the fine particulate and high solids concentration Product Solutions EROSION CONTROL Specially designed valve body and trim combats the process of erosion WEAR RESISTANCE Solid metal or Very Tough Ceramic VTC seat ring and valve plug for erosion resistance and long service life RUGGED CONSTRUCTION Sealed metal bearings help prevent particle buildup and valve shaft seizure in erosive applications TIGHT SHUTOFF Self centering seat ring and rugged plug for tight shutoff and reduced internal wear CORROSION CONTROL Alloy material options promote corrosion resistance and long service life EASY INSTALLATION Centering holes and line flange bolts reduces valve centering issues for easy installation PO
22. er Pulp and Paper Solutions 11 Cooking Digester Liquor Level Control Continuous digester liquor level control is a critical and demanding application The liquor level is critical to digester operational stability providing correct throughput and reducing kappa variation lignin measure in the pulp Found in the make up liquor line after the make up liquor pump the control valve controls liquor flow to the top of the impregnation vessel in a two vessel system The valve is subjected to cavitation flashing erosion scaling vibration and noise issues Product Solutions m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic for maximum flow control m INCREASED THROUGHPUT Unrestricted straight through flow design provides greater capacity m TIGHT SHUTOFF Self centering seat ring and rugged V notch ball allow for tight shutoff m REDUCED DOWNTIME Rugged seat ring has two shutoff surfaces that are easily reversed reducing downtime m ANTI SCALING Cammed Vee Ball design reduces effects of scaling a i ee e fe A l Wes if TAL Vi e e H ek m i 4 i e Fisher CV500 control valve 1061 actuator and FIELDVUE DVC6200 12 Fisher Pulp and Paper Solutions Cooking Digester Switching In a continuous digester s cooking zone cooking liquors are circulated in loops to add the appropriate heat and chemicals to cook the wood chips
23. f your mill Emerson local business partners and sales offices are backed by global manufacturing sites that can effectively manufacture measure and assemble these highly engineered solutions No matter where your Fisher pulp and paper control valve or technology is manufactured product quality remains a constant Parts and service are available to minimize downtime and maximize throughput If you want help to ensure your next control valve and related technologies are optimizing your process and maximizing your profitability contact your Emerson local business partner or sales office You will receive the support you need to accurately size select and install the right control valve for your toughest papermaking challenge For more information on the Fisher pulp and paper control valves and technologies you read about here please contact your local business partner or go to www EmersonProcess com Fisher The PlantWeb dynamic performance lab enables thorough product differentiation testing and analysis Serving You Through The Life of Your Plant Parts Confidence in papermaking solutions relies on true OEM engineering and manufacturing specifications Replicator parts typically do not last as long as genuine Fisher parts so you have to replace them more often This can be due to wrong materials specifications incorrect machining and tolerances used or essential design features not being incorporated into the components
24. fe m EASE OF MAINTENANCE Valve can remain in pipeline during removal of trim parts for inspection or maintenance m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher HPT control valve 585C actuator and FIELDVUE DVC6200 Fisher Pulp and Paper Solutions 29 Power and Steam Cycle Main Steam Pressure Reduction Most mills need to accommodate a variety of steam pressure requirements for the various processes in the mill Steam from the power and recovery boilers supply high pressure and temperature steam to the high pressure header and can be staged down to accommodate the pressures needed at the other headers Pressure reduction between headers can be achieved through the use of pressure reducing valves PRV or a steam turbine These valves are exposed to high pressure and temperature steam high ambient temperatures severe vibration and high levels of noise Product Solutions m HIGH PRESSURE CAPABILITIES Rugged design and valve options allow for a multitude of pressure class ratings m HIGH TEMPERATURE OPTIONS Valve options provide high temperature capabilities that also reduce vibration mechanical noise and maintain valve plug stability m NOISE REDUCTION Available trim technologies to ensure the safety of personnel and meeting regulatory requirements m TIGHT SHUTOFF Advanced sealing technology provides correct shutoff and extends valve s service life
25. her Documentation Lg 2012 Fisher Controls International LLC All rights reserved in http www LinkedIn com groups Fisher 394 1826 Fisher Power Industry Solutions Document Number D351920X012 www EmersonProcess com Fisher Documentation Fisher Vee Ball Attenuator Fisher FIELDVUE Control Disk PlantWeb ENVIRO SEAL and Vee Ball are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user e EMERSON Process Man
26. ieve efficient productive and safer plant operation FIELDVUE Performance Diagnostics Reliability is a key requirement for all process facilities FIELDVUE digital valve controllers installed on Fisher control valves protect your assets by giving a view of operating characteristics such as supply pressure control signal friction and seat load FIELDVUE Performance Diagnostics run continuously analyzing valve and actuator data while the valve remains in service If problems are detected information can be directed to the appropriate personnel automatically when installed in a PlantWeb system These notifications help you keep the control valve and the process loop functioning optimally Fisher control valves undergo extensive testing for proof of performance Reliable Fluid Control Emerson has led the way in engineering and manufacturing control valves and technologies that solve pulp and paper customer issues Correct engineering and manufacturing of these technologies is critical to overall operation and life expectancy Selecting the right materials the right noise abatement technology and the most appropriate control valve for the application can be the difference between your process running at its full potential or a shutdown Emerson provides the quality accuracy and engineered solutions demanded by these difficult papermaking applications Local service is provided before the sale and through the life o
27. iew all applications so the best noise mitigation solutions are appropriately selected for your applications and assets View a video about noise at www FisherSevereService com under the noise video link to the right Fisher Pulp and Paper Solutions 5 Cavitation Flashing Simply stated cavitation is the formation and collapse of Although similar to cavitation flashing creates a liquid vapor cavities in a flowing liquid It becomes critically important for mixture where the proportion of gas and liquid phase changes as appropriate valve sizing selection of products and materials pressure or temperature change Whereas cavitation creates an irregular pitted surface on components flashing creates a shiny and cavitation mitigation technologies to ensure problems do and smooth appearance not arise Emerson provides a wide range of cavitation control technologies for clean or dirty service Utilizing Fisher application engineers and experienced design engineers will ensure you receive a custom solution for your application However flashing is of concern because of its ability to limit flow through the control valve and its highly erosive nature This can cause operational problems increased maintenance and unexpected downtime Cavitation is a concern for plant operators and maintenance personnel because it can reduce plant operations and profitability Cavitation not only decreases flow capability through control valves
28. ll mills there are six major steps to the papermaking process mechanical preparation of the wood into wood chips turning wood chips into pulp digestion chemical recovery pulp whitening through bleaching pulp stock preparation and finally paper formation The first of these steps uses strictly mechanical processes to form small chips from the logs supplied to the mill By products such as bark and even some chips themselves are used as fuel to produce steam and electricity for mill use Although some water may be used for lubrication purposes this is primarily a dry process and proceeds with minimal process instrumentation The pulping process has many variations the most common being the kraft process which uses caustic chemicals to digest the lignin in the wood chips This is different than the sulfite process which uses acidic chemicals to digest lignin No matter the process the chemicals used are regenerated in a multi stage recovery process that reduces chemical costs and minimizes waste disposal costs Appropriate process control helps to ensure maximum chemical regeneration After cooking the wood chips pulp stock leaves the digester as a brown slurry Depending on the end product it may be bleached or remain brown If bleaching is necessary large quantities of expensive bleaching chemicals like chlorine dioxide ClO are used and must be precisely controlled to minimize financial impact The slurry then heads towa
29. m EASE OF MAINTENANCE Valve can remain in pipeline during removal of trim parts for inspection or maintenance m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher EWT 585CLS and FIELDVUE DVC6000 J o wm o Q T r o D A lt a D aS U gt d E o weed Vn O o A 30 Fisher Pulp and Paper Solutions Power and Steam Cycle Turbine Bypass Turbine bypass systems permit operation of the steam generator independently of the turbine during startup shutdown and plant upset conditions They must be adequately sized to meet the needs of normal startup and shutdown as well as transients They must also operate at acceptable noise levels To minimize unplanned downtime bypass valves are installed in parallel with the turbine to ensure pressure reduction occurs even when the turbine is offline Fisher steam conditioning units combine the control of steam pressure and temperature into one system These valves address the need for better control of steam conditions brought on by increased energy costs and more rigorous plant operation They provide the needed temperature control and noise abatement technology Product Solutions m HIGH PRESSURE CAPABILITIES Rugged design and valve options allow for a multitude of pressure class ratings m HIGH TEMPERATURE OPTIONS Valve options provide high temperature capabilities m NOISE R
30. p in place m REDUCED MAINTENANCE Flanged valve body reduces alignment and installation time m SMALL ACTUATOR PROFILE Actuator profile promotes smaller envelope package size for tight spaces m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher ceramic Micro Notch ball D 2 el M wm O A T u E Ze J i d A A 22 Fisher Pulp and Paper Solutions Paper Machine Basis Weight Pulp stock consistency is a key factor in determining the grade and quality of the end product Basis weight measured at the dry end of the machine is fed back via control logic to the basis weight valve at the wet end of the machine Appropriate adjustments can then be made to produce an end product that meet s customer specifications This makes the basis weight valve one of the most critical in the mill Quick accurate step changes to setpoint are a must Response time must also be quick Correct control logic between the course and trim valves are necessary to ensure correct end product basis weight Product Solutions m MAXIMUM FLOW CONTROL V notch ball provides modified equal percent flow characteristic m ZEROLOST MOTION Splined driveshaft and shaft to ball pinning allows for tight control m EXTENDED SERVICE LIFE Rugged bearing design for extended service life m EASE OF MAINTENANCE Low friction bearings drop in place for easy maintenance m REDUCED MA
31. ping Brown Stock Rejects 15 Medium Consistency Pump Discharge 16 Bleaching Chlorine Dioxide Addition 17 Recovery Black Liquor Evaporation 18 Green Liquor Dissolving Tank Density 18 White Liquor Pressure Filter Switching 19 Black Liquor Guns 20 Lime Mud Underflow 20 Paper Machine _ Paper Additives 21 Basis Weight 22 Vacuum Box 23 _ Dryer Steam and Condensate Return 23 Power and Steam Cycle Boiler Feedwater Startup and Regulating 26 oo Boiler Feedpump Recirculation 26 Sootblower 27 Sky Vent 28 Main Steam PRV 29 Turbine Bypass 30 Steam Conditioning 31 4 Fisher Pulp and Paper Solutions Damaging Effects of the Papermaking Process Material Damage Physical damage to control valves can mean high maintenance costs lack of predictability of the damage and unplanned shutdown or downtime Damage can consist of a mechanical and or selective chemical nature on material surfaces Cavitation damage is a concern in many processes including the power and recovery boiler units This mechanical damage is characterized by a very irregular pitted and rough appearance Control valves with extensive damage may have large amounts of material missing and may severely affect the valve s operability Fisher cavitation solutions help to minimize cavitation damage and prevent the severity of erosion Erosion in a paper mill is also a concern Erosive slurries including pulp sto
32. rd the stock preparation section of the mill Here different batches of pulp may be blended to produce paper of various required properties Starches clays and other retention aids are added to improve the wetting properties of the paper so the end product meets customer specifications The paper machine is the final step in the process of producing the correctly specified end product Reliable control valves are necessary to ensure the appropriate percentage stock is sprayed onto the paper machine felt appropriate temperatures are obtained for drying the paper and vacuum controls are running to dispense condensate Control of steam pressures and temperatures are likely the most critical applications in a pulp and paper mill Steam is used for wood chip preparation process heating paper drying boiler cleaning energy production and in many other applications Wherever your tough application exists the reliability of your control valves play a critical role in helping improve your process In this brochure well discuss the many application challenges you encounter in each process and ways that Fisher control valves and technologies can help to combat these application challenges while ensuring your mill operates at its peak performance Fisher Pulp and Paper Solutions 3 Table of Contents Caustic Addition 10 Digester Liquor Level Control 11 Digester Switching 12 Digester Blow 13 Batch Digester Gas Relief 14 Pul
33. ring design for extended service m LOW FRICTION Bearings with minimal friction provide optimal control and drop in place for easy maintenance m REDUCED MAINTENANCE Flanged valve body reduces alignment and installation time m ASSEMBLY SIZE Actuator profile promotes smaller envelope package size for tight spaces m EXOTIC MATERIALS Alloy valve capabilities available for high corrosion applications z D ell a 7 OQ FIELDVUE 2a 5 Fisher V150 Vee Ball control valve 2052 actuator and FIELDVUE DVC6200 Kal Lm ai E ol A oi oO 18 Fisher Pulp and Paper Solutions Recovery Black Liquor Evaporation The change of weak black liquor to strong black liquor via an evaporation plant allows black liquor to be burned as fuel in the recovery boiler and serves as the major application in the recovery cycle of the paper mill The main purpose of the evaporation plant is to increase the dry solids content of the black liquor by evaporating water until reaching a concentration suitable to allow burning in the recovery boiler With the help of a concentrator black liquor is 65 80 solids after leaving the evaporation plant An evaporation plant usually consists of several heat transfer units connected in a series A valve in this environment is subjected to scaling due to thick media and must perform in both a traditional throttling and on off application Green Liquor Dissolving Tank Density Molten smelt from th
34. sistant hardened trims extend service life m TIGHT SHUTOFF Advanced sealing technology provides tight shutoff m EASE OF MAINTENANCE Valve can remain in pipeline during removal of trim parts for inspection or maintenance m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration D o wm o Q T r o D A lt al D Fisher HP control valve 667 actuator FIELDVUE DVC6200 U gt d E o we Ku U i o A 28 Fisher Pulp and Paper Solutions Power and Steam Cycle Sky Vent Sky vent valves may operate during startup and shutdown of the heat recovery steam generator bypassing main steam around the steam turbine to the atmosphere Sky vent valves must withstand the full pressure drop that occurs as the valve dumps high pressure and temperature steam directly to the atmosphere They should operate quietly during dump operation and provide tight shutoff during normal operation to prevent valuable steam leakage Product Solutions m MAXIMUM FLOW CONTROL Pneumatic actuation provides highly accurate step positioning and stable valve response m FLOW RESPONSE Optional accessories ensure quick step valve positioning for precise throughput and control m NOISE REDUCTION Noise abatement technology reduces the harmful effects of noise and vibration m TIGHT SHUTOFF Advanced sealing technology provides tight shutoff and extends valve s service li
35. tuator and FIELDVUE DVC2000 14 Fisher Pulp and Paper Solutions Cooking Batch Digester Gas Relief A batch digester is essentially a large pressure cooker As steam is applied to the mass of chips and liquor a quantity of resinous vapors are distilled off These vapors along with entrained air in the chips and a small quantity of non condensed steam can collect at the top of the digester These accumulated additional gases can be sufficient to indicate false high pressures relative to the steam saturation temperature inside the digester thereby causing the wood chips to be undercooked If a gas relief valve is necessary then gases cooking liquors cellulosic fibers and chips can severely erode and corrode the gas relief valve Product Solutions TIGHT SHUTOFF EASY INSTALLATION EROSION CONTROL Specially designed valve body and trim combats the process of erosion WEAR RESISTANCE Solid metal seat ring and valve plug for erosion resistance and long service life RUGGED CONSTRUCTION Sealed metal bearings help prevent particle buildup and valve shaft seizure Self centering seat ring and rugged plug for tight shutoff and reduced internal wear Centering holes and line flange bolts reduces valve centering issues for easy installation POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Sa d gek A de ke ka e Dn E Ws Fisher V500 control valve 1061 actuator and FIE
36. ugh the filter and cakes onto the filter itself When the filter is too caked with lime mud the recirculation valve opens and causes the pressure to suddenly drop and create a backflow against the filter This knocks off the lime mud This opening and closing of the discharge valve occurs every five to ten minutes This process will see frequent and fast switching and is hard on valves and actuators Damage includes piston seal wear bearing wear and packing box leaks Additionally this slurry is very erosive due to high solids content and must maintain tight shutoff Product Solutions m EXTENDED SERVICE LIFE Heavy duty valve bearings and PTFE packing extend service life capabilities m LOST MOTION Minimal lost motion with taper pin disk connection and splined shaft m FLOW CAPACITY Contoured disk increases flow capacity and reduces operating torque m EMISSION CONTROL Superior sealing and ENVIRO SEAL packing reduces emissions m EASY INSTALLATION Centering holes and line flange bolts reduces valve centering issues for easy installation AJ D A lt D wm lt Fisher 8532 High Performance Butterfly Valve 1061 actuator and FIELDVUE DVC6200 Ki a ol W U a 20 Fisher Pulp and Paper Solutions Recovery Black Liquor Guns Black liquor from the evaporator set is introduced into the recovery boiler via liquor guns These guns produce a spray that is combustible by a hot flue gas The spray is controll
37. w valves typically found at the bottom of digesters and or near the top of the blow tank ensure pulp stock retains its integrity while still allowing all cooking liquors to be recovered However insufficient discharge can ruin valuable pulp and cause loss of expensive steam and cooking liquors In batch and continuous digesters these valves are subjected to erosion and high vibration from high velocity stock flow High levels of sand and other debris from the chip feed stock will also cause premature valve body and ball erosion Additionally in batch digesters it is critical for the valve to retain its pressure boundary and prevent leakage as this can lead to inefficient cooking of the wood chips Precise control is necessary to achieve the required pulp kappa value Product Solutions m MAXIMUM FLOW CONTROL V notch ball contouring provides modified equal percent characteristic for maximum flow control m ZEROLOST MOTION Splined driveshaft ensures zero lost motion allowing for tight control m TIGHT SHUTOFF Heavy duty seal provides tight shutoff m EASE OF MAINTENANCE Drop in place installation for easy maintenance m REDUCED MAINTENANCE Flanged valve body design reduces alignment and installation time m SMALL ACTUATOR PROFILE Actuator design promotes smaller envelope package size for tight spaces m POSITIONER FEEDBACK Linkage less and non contact feedback improves reliability in high vibration Fisher V150 Vee Ball control valve 2052 ac
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