The conesep system is designed to transfer ion exchange resins from the service polishing unit to entirely separate vessels for regeneration. Resin bed regeneration in water treatment processes analytical applications. The ion exchange of the process involves exchanging the contaminant ions with hydrogen and hydroxide ions for hoh cycle in a porous synthetic resin media. Us4191644a regeneration of mixed resin bed used for. A properly functioning condensate polisher is therefore just as likely to require back washing and regeneration based on increasing pressure drop as it is based on ionic exhaustion.
This project profile illustrates the process for cpu and external regeneration system. Offsite regeneration of condensate polishing resins. Whereas condensate from sugar industry is having characteristics, bod from 100150 mgl, cod 250 to 320 mgl, colour less and ph around 6. Condensate polishing units are typically installed for super thermal power stations with the main objective of improving the boiler water quality. These units are usually designed for a high specific flow rate 80 to 120 bed volumes per hour. Condensate polishers selection guide engineering360. Condensate polishers are used in various applications and industries. This condensate polishing is the unsung hero of efficient plant operations, as it can remove impurities, prevent leaks, and avert shutdowns. Chloride content in caustic used for anion regeneration should be compatible with rayon grade a. Condensate polishing packages sewage treatment reverse. Specifications developed prior to bidding called for a 30 diameter vessel containing 15 ft3 of condensate polishing condensate polisher savings of 23% realized through value engineering reskem corp po box 1059 media, pa 19063 8003231983 6103580717 6103584642 fax. Impurities in the condensate can be removed by membrane filtration, in the particular case by reverse osmosis, and high condensate qualities can be achieved. At one smaller unit in the system, a condensate polishing system was not installed, but a filter system was installed.
Standardized units reduce time to market, optimize cost, facilitate maintenance and represent proven solutions. In a steam generation plant traces of different kind of impurities can be removed from the return steam condensate in order make it suitable to be reused. If you are using existing condensate pumps, you could be limited to the amount of additional pressure drop that can be added to the system. Condensate polishers add operating reliability and flexibility. Condensate polishing technologies for combined cycle. Condensate polishing for the power industry purolite. Mixed bed polisher mbp and condensate polisher cpp. Condensate polishing experts part of berkshire hathaway companys marmon water group, graver pioneered highperformance condensate polishing and water treatment for power generators around the globe.
Condensate polishing unit aqua designs offers condensate polishing unit having collaboration with italian technology provider who has more than 15 installations in europe. With this advanced technology, safbon has supplied close to 80 sets of such installations for power plants in china and overseas. Cation and anion resins are separately chemically regenerated. The prefilters add to the pressure drop in the system. Wigen is a recognized leader in the design and fabrication of condensate polishing systems for industrial, power and steam utility applications. If condensate polisher fcv231 and fcv232 not full open bypass valve opens. The ultimate goal of condensate polishing is to remove all soluble impurites and protect the high. This includes power generating facilities using oncethrough steam generators otsg, critical and supercritical steam. A mixedbed polisher unit will be required if the product water specification is below that achievable from the demineralization plant alone or if a higher degree of safety is required to ensure water quality. It can also be applied to condensed steam from any steam system being returned to the boiler. The purpose of the condensate polishing system is to. Doc condensate polishing training manual eli salem.
Supply an adequate concentration of acid sulfuric acid to regenerate cation resins. Performance of the existing unit, targets for future. Condensate polishing custom water treatment systems. Driplex offers a wide range of condensate polishing solutions, from deep bed condensate polishers and powdered resin condensate treatment, to special resin grades and offsite regeneration. Although early bwr deep bed plants included regeneration systems, none are operable today and only a few were ever operated. The interface resin cut is further classified by various physical separation techniques.
Some plants used ultrasonic resin cleaners to remove the particulate iron oxides and then return the resins. Condensate polishing treatment process boustead salcon. Polisher type boiler type iron total copper total inlet outlet inlet outlet comrec mixed bed regeneration process db bwr 36 9,7 10 2,6 db o. The cation resin is left in the bottom of the anion regeneration vessel, and is subsequently transferred into the cation regeneration vessel along with. Condensate polishers are used to maintain a proper quality of water by removing impurities from return condensate. Onsite external regeneration is the most common technique used today for deepbed condensate polishers. Condensate polishers filter out the particulates and remove soluble contaminants by ion exchange. The process is reversed when the resin is fully regenerated, transferring it back into the.
Condensate from distillery unit is having characteristics bod ranging from 2200 to 2500 mgl, cod ranging from 4000 to 4500 mgl, colour less, acidic in nature. Condensate polishing normally applies to the treatment of condensed steam from turbines operating in the power industry. The floating anion resin, free of cation fines, is transferred to the mix and hold vessel for rinsing. Condensate polishing unit deionized demineralised water. Condensate polishing systems for other applications typically feature insitu regeneration using conventional equipment. Externally regenerated condensate polishing technology key. This is where a condensate polishing system becomes a vital part of an efficient industrial water treatment system. This fertilizer plant is located in nigeria, africa. The condensate polishing units with a common external regeneration system and associated accessories shall conform to the technical specification pets423155a001condensate for polishing unit of 1x800 mw coal based north chennai tpp stage iiibtg. With the mgr movex system, exhausted ion exchange resins are moved into special vessels where a high degree of regeneration without contamination is. Condensate polishers for industrial applications such as electronic component manufacturing and automotive painting are also available. Condensate polisher gea engineering for a better world. We supply the north america condensate polishing market with 75% share in powdex and 60% share in deep bed systems north america in the last 15 years.
Condensate polishing can improve bottom line by reducing the losses or damages caused by corrosion and deposits. The condensate polisher was required to treat a design flow rate of 75 gpm. Products for food, medical, and sanitary applications are designed to comply with industry standards or government regulations for purity. The condensate polishing units with a common external regeneration system and associated accessories shall conform to the technical specification pets412155aa001 for condensate polishing unit of 2x 660 mw ennore sez stpp. Condensate polishing unit free ebook download as pdf file. Although condensate polishing can be a highly effective method to purify and recycle the condensate stream, several different system designs and. Resin bed regeneration guide in water treatment processes. Condensate polisher savings of 23% realized through value. An introduction to condensate polishing condensate polishing a preventative approach 3 the role of ion exchange in condensate polishing 3 the purpose of this guide 4 the type of condensate polishing operation depends on the operating parameters boiler pressure 4 condensate polishing systems currently used or proposed for operation. Improvements in regeneration, resin separations, resin. Brad buecker is a senior process specialist in the water. Safbon specializes in utilizing hitower external regeneration technology and precoat powdered resin systems for condensate polishing applications. Merits of combined cycle hrsg condensate polishing power.
Though cpu is an ion exchange based mixed bed system operating at elevated temperature, external regeneration is a must to avoid cross contamination to achieve stringent. We offer the worlds most complete, durable, highperformance solutions for combined cycle cp and filtration needs. Process condensate shall be generated at mp and lp. Condensate polishing demonstrates cost effectiveness 1 much faster initial plant start. Condensate polishing for nuclear and super critical power. When the operating pressure is not too high, cylindrical vessels are used, but at 4 mpa 40 bar or above, spherical vessels are necessary to keep the shell thickness within reasonable limits. When the operating pressure is not too high, cylindrical vessels are used, but at 4 mpa 40 bar or above, spherical vessels are necessary to. Each unit treats a condensate flow of 35,568 m3day. Mixed resin is transferred to the cation regeneration unit. A highly important safety net for more efficient plants process eliminates the need for costly sensors or specialty chemicals to identify and separate. Better industrial water treatment with condensate polishing.
Dow liquid separations dowex ion exchange resin guide to. In an alternative embodiment cation resin fines are physically separated from the. Chapter 2 describes evaluation of the plant and the determination of features that would be desirable for use with offsite regeneration. We offer stateoftheart, comprehensive solutions for condensate polishing unit for sugar, distilleries, captive and cogen power plant ad process industries condensate polishing units based on anaerobic and aerobic treatment for reuse in processes. Guidelines for offsite regeneration of condensate polishing resins, epri, palo alto, ca. An introduction to condensate polishing condensate polishing a preventative approach condensate polishing is an important part of water treatment for any utility or industrial power generating system. The condensate can be returned to an ultra pure state by simple polishing rather than using fresh make up process water. A process is disclosed in which a spent mixed anioncation exchange resin bed is hydraulically separated into cation, anion and interface resin cuts. As a team effort, boustead salcon and boustead projects delivered a 2 x 6,000 m3day condensate polishing system for the 60 mw biomassclean coal plant located at tembusu, jurong island. Condensate from evaporation plants is used as boiler feed water, process, cooling, and rinsing water or is directly discharged into a drainage ditch. There are many condensate polishing, mixed bed regeneration systems operating with various degrees of satisfaction.
Condensate polishing unit reliability engineering boiler. Both cation and anion resin quantities are to be made up to the design quantities so as to maintain their interface level in resin separation unit. The polisher removes impurities from the condensate return water reducing scale, boosting heattransfer efficiency, reducing damage that impurities can cause to expensive boiler equipment, and increasing the amount of condensate return water. This is condensate produced from steam reboilers heat exchangers. Putting condensate polishing issues to bed power engineering. These systems are used to maintain a high quality of water by removing impurities from condensate return streams. Condensate polishing provides an added layer of protection to the units, and eases burdens on boiler water chemistry control. Condensate polishing unit distillery process condensate. The decision to polish return condensate for reuse is purely economical. Condensate polishing unit the condensate polishing unit removes crud mostly consisting of sodium, chloride, silica and carbon dioxide. In large power stations, the flow rate through each condensate polishing unit is often 200 to 800 m 3 h.
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