Polishing condensate reduces the risk of damage to the boiler and the turbine caused by the concentration of soluble impurities that corrode internals which contribute to insoluble impurities such as copper, iron and silica in the recirculating. 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. Larger autoclaves with integral or standalone steam generators and water cooling systems use a lot more water per cycle. Condensate polishing unit and its uses in power plant. Presented at globalspecs august 2010 industrial processing virtual tradeshow. Powdex systems have been designed with condensate flow capacities up to 33,000 gpm 7,500 m3hr for a single installation. Suppose that the original condensate unit is replaced by a new one, which is identical in all respects to the original except that it has a much larger receiver. An introduction to condensate polishing condensate polishinga 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. In large power stations, the flow rate through each condensate polishing unit is often 600 to m 3 h. Condensate polishing encyclopedia article citizendium.
Condensate polishing for the power industry purolite. Download limit exceeded you have exceeded your daily download allowance. The system is designed to treat 445 gpm of condensate and is replacing. Mixed bed polisher mbp and condensate polisher cpp. This paper provides a brief history and timeline of condensate polishing from the 1950s. Guide for condensate polishing power plant see other formats k t disclosure to promote the right to information whereas the parliament of india has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the. One unit is always in service, and the other units automatically come online as the flow increases. Operation optimization of condensate polisher and effect analysis. These units were retrofitted in the early 1960s into the condensate system specifically to remove copper from the condenser and lp heaters before it could carry over.
Condensate polishing for nuclear and super critical power. These units are usually designed for a high specific flow rate 80 to 120 bed volumes per hour. It can also be applied to condensed steam from any steam system being returned to the boiler. Performance of the existing unit, targets for future. Condensate polishing packages sewage treatment reverse. The powdex condensate polishing system consists of a vessel containing precoatable filter septa. Condensate polishing technologies for combined cycle. This is condensate produced from steam reboilers heat exchangers.
Condensate polishing systems must produce high purity effluent satisfying the following requirements. This feature provides uninterrupted flow of soft water 247 during. If you continue browsing the site, you agree to the use of cookies on this website. A highly important safety net for more efficient plants process eliminates the need for costly sensors or specialty chemicals to identify and separate. Doc condensate polishing training manual eli salem. The intimate mixture of resins provides a perfect environment for removal of dissolved ionic contaminants. Jan 25, 2018 this is where a condensate polishing system becomes a vital part of an efficient industrial water treatment system. Acid injection in the crt for regeneration of the cation resin which doesnt contain. Mixed resin is transferred to the cation regeneration unit. 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. Since the resin is always new and fully regenerated high quality water can be. Condensate polishing unit reliability engineering boiler. 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 that can be reintroduced into the. Condensate polishing technologies for combined cycle power.
Evoqua water technologies evoqua is a worldwide leader in resin regeneration services. 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. This fertilizer plant is located in nigeria, africa. Resin bed regeneration guide in water treatment processes.
Condensate polishing can improve bottom line by reducing the losses or damages caused by corrosion and deposits. The regeneration process offered by the bidder shall be of proven design and. Condensate unit article about condensate unit by the free. Cp safeguards highvalue plant assets by reducing startupdowntime, stabilizing cycle chemistry, minimizing corrosion transport and. Commonly used as part of a power plants condensate system, it prevents premature chemical failure and deposition within the power cycle which would have resulted in loss of unit efficiency and possible mechanical. 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. For existing condensate polishing plants in which these systems are in need of replacement or extensive overhauls or in some cases where new plants are built without this equipment, offsite regeneration is the solution. These resins have a much narrower particle size distribution than prior grades used for condensate polishing and have become the virtual standard for condensate polishing systems. Condensate polishing system shipped to university in massachusetts a triple all stainless steel condensate polisher was shipped to a university in cambridge, massachusetts. As the flow rate decreases, units will be removed from service based on the preprogrammed gpm settings. Steam condensate is the water formed by condensing the exhaust steam from the steamdriven turbines in thermal power plants and which is recycled for reuse as the major part of the steam generation feedwater. Where polishing and filtration are required due to suspended solids in the condensate, powdex may be the solution. Condensate polishing unit for alkhalij power plant, libya was executed in the year 2011. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
In large power stations, the flow rate through each condensate polishing unit is often 200 to 800 m 3 h. Filter elements are precoated with ion exchange resin to provide the dual function of ion exchange and filtration a unique solution in condensate polishing. This is the most economical and efficient system yet devised to provide both filtration and ion exchange capabilities. Chloride content in caustic used for anion regeneration should be compatible with rayon grade a.
Your source for condensate polishing graver water systems. Presented by zohaib hassan khokhar sabir munir wahla 4 basics of power production 5 basics of power production 6 basics of power production the burning of fuels in the furnace of a boiler produces heat in turn heats up the water in the boiler and converts it. Fossil units equipped with suitable polishing systems have important. Nov 11, 2010 presented at globalspecs august 2010 industrial processing virtual tradeshow. 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 unit aqua designs offers condensate polishing unit having collaboration with italian technology provider who has more than 15 installations in europe. Condensate polishing unit free ebook download as pdf file. Most reliable, cost effective condensate filtration solution the power industry is installing hundreds of new condensate polishing systems as a result of increasingly stringent boiler feed water requirements, the need for greater power production reliability. Condensate polishing systems for other applications typically feature insitu regeneration using conventional equipment. The touchclaver and touchclavelab f from lte scientific, oldham, uk, use as little as 4 l of water per cycle thanks to their inchamber heating, fan cooling system and aircooled condensate units. Condensate from evaporation plants is used as boiler feed water, process, cooling, and rinsing water or is directly discharged into a drainage ditch. Guidelines for offsite regeneration of condensate polishing resins, epri, palo alto, ca.
Polishing condensate reduces the risk of damage to the boiler and the. The conesep system is designed to transfer ion exchange resins from the service polishing unit to entirely separate vessels for regeneration. The uniform size allows for good flow characteristics and the lack of fine particles can mean lower differential pressure. Condensate polishing normally applies to the treatment of condensed steam from turbines operating in the power industry. When the exchange capacity is exhausted or when high pressure drop indicates maximum suspended solids removal, bead resins are generally cleaned and regenerated outside the service unit itself. Assess objectively the current state of development and application of water treatment technologies relating to fossil fuel power generation worldwide.
Our expertise and trackrecord in the power sector and our proprietary condensate polishing technologies are amongst the best in the world. Rinse water outlet header of each condensatepolishing unit shall be. 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. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.
Condensate polisher gea engineering for a better world. 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. The exchange of ions is achieved through the use of resin beds contained in two or more separate vertical pressure vessels. Condensate polishing powers combined cycle operations including ngccs condensate polishing cp is an essential component of combined cycle plant design and operation because high purity condensate maximizes uptime. 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.
Each unit treats a condensate flow of 35,568 m3day. The process is reversed when the resin is fully regenerated, transferring it back into the service unit. Impurities in the condensate can be removed by membrane filtration, in the particular case by reverse osmosis, and high condensate qualities can be achieved. It is frequently filled with polymer resins which are used to remove or exchange ions such that the purity of the condensate is maintained at or near that of distilled water. Externally regenerated condensate polishing technology key. With the mgr movex system, exhausted ion exchange resins are moved into special vessels where a high degree of regeneration without contamination is. This condensate polishing is the unsung hero of efficient plant operations, as it can remove impurities, prevent leaks, and avert shutdowns. Problem analysis and treatment based on condensate. Condensate polishing operations rely on ion exchange technology consisting of selective columns that are capable to reliably and consistently produce water with minimal impurities and almost zero leakage. On maasflaktenetherlands demineralisation gravel and activated carbon filtration, ro, mixed bed, chemical storage condensate polishing plant cartridge filter, cation exchanger, mixed bed exchanger. The resin is backwashed again without air scour and the. Process condensate shall be generated at mp and lp. Oct 28, 2011 condensate polishing system shipped to university in massachusetts a triple all stainless steel condensate polisher was shipped to a university in cambridge, massachusetts.
The ultimate goal of condensate polishing is to remove all soluble impurites and protect the high. Condensate polishing typically involves ion exchange technology for the removal of trace dissolved minerals and suspended matter. Various feasible solutions were proposed to solve the problems of debugging condensate polishing system in 600mw unit of power plant, such as unsuitable hydraulic test, poor effect of resin regeneration, imperfect program control interlock protection and so on. Condensate polishing plant cartridge filter, mixed bed exchanger, regeneration station, condensate storage tank 3 x 400 m. A condensate polisher is a device used to filter water condensed from steam as part of the steam cycle, for example in a conventional or nuclear power plant powdered resin or deep bed system. Both cation and anion resin quantities are to be made up to the design quantities so as. Condensate unit article about condensate unit by the. The unit at eddystone station 1 is a twounit full flow condensate polisher located after the last lp heater and before the deaerator. Condensate water polishing system boiler filtration. Proper regeneration of the condensate polishers is one of the key factor in maintaining.
Condensate polishing with separix external regeneration water technologies why polish condensate. Powdex precoat filter demineralizer graver water 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. Chemical regeneration of the ion exchange resin is typically accomplished. As you will see, the equipment and installation roi was less than. In a passive alwr plant, properly designed condensate polishers will maintain water chemistry within specified limits, assuming a condenser tube leak of 0. As you will see, the equipment and installation roi was less than 10 months. Condensate polisher ion exchange resin regeneration. Presented by zohaib hassan khokhar sabir munir wahla 4 basics of power production 5 basics of power production 6 basics of power production the burning of fuels in the furnace of a boiler produces heat in turn heats up the water in. We can help you determine if powdex is a suitable solution for your.
This is where a condensate polishing system becomes a vital part of an efficient industrial water treatment system. Chapter 2 describes evaluation of the plant and the determination of features that would be desirable for use with offsite regeneration. From oil and particulate removal within industrial applications to high pressure, pure water systems for nuclear power generation, ovivo has a range of solutions to suit any condensate polishing application. Condensate polishing for nuclear and super critical power plants. Resin bed regeneration in water treatment processes analytical applications. Low level conductivity monitoring of the process water using type 462025 transmitters and associated conductivity cells. Dow liquid separations dowex ion exchange resin guide to. Condensate polishing is an ion exchange process used to purify the steam condensate produced in highpressure steam generation facilities such as those in large thermal power plants. Feb 10, 2017 condensate polishing unit and its uses in power plant.
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