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How DM plant are design?
Since there is continuous withdrawal of steam and continuous return of condensate to the boiler, losses due to blowdown and leakages have to be made up to maintain a desired water level in the boiler steam drum. For this, continuous make-up water is added to the boiler water system. Impurities in the raw water input to the plant generally consist of calcium and magnesium salts which impart hardness to the water. Hardness in the make-up water to the boiler will form deposits on the tube water surfaces which will lead to overheating and failure of the tubes. Thus, the salts have to be removed from the water, and that is done by a water demineralising treatment plant (DM). A DM plant generally consists of cation, anion, and mixed bed exchangers. Any ions in the final water from this process consist essentially of hydrogen ions and hydroxide ions, which recombine to form pure water. Very pure DM water becomes highly corrosive once it absorbs oxygen from the atmosphere because of its very high affinity for oxygen. The capacity of the DM plant is dictated by the type and quantity of salts in the raw water input. However, some storage is essential as the DM plant may be down for maintenance. For this purpose, a storage tank is installed from which DM water is continuously withdrawn for boiler make-up. The storage tank for DM water is made from materials not affected by corrosive water, such as PVC. The piping and valves are generally of stainless steel. Sometimes, a steam blanketing arrangement or stainless steel doughnut float is provided on top of the water in the tank to avoid contact with air. DM water make-up is generally added at the steam space of the surface condenser (i.e., the vacuum side). This arrangement not only sprays the water but also DM water gets deaerated, with the dissolved gases being removed by an air ejector attached to the condenser.
What is the MEANING OF bop power plant?
BOP is Balance Of Plant.BOP is the Plant/Equipment supporting to operate main plant/equipment i.e. BTG (Boiler,Turbine,Generator) . BOPs are Cooling Water plaint's cooling water plnt,cooling tower,chimney,DM/EDP/chemical treatment plant/DG set etc.
What is the definition of dm water?
Demineralised water. DM water is demineralised water . Dissolved impurities and dissolved gases in water. Some times water is hard, temperary hardness or permanent hardness and which is badly affects the boiler which helps formation of scales in sides the boiler. In the process of purification of water Coagulation, sedimentation, filteration are the first stages. After filteration water allowed to enter into Activated carbon filter for absorbing dissolved carbondioxide. For removing temporary hardness and permanent hardness ion exchanging process used. By Ion - exchange process from which the minerals have been removed and get Demineralized water.
What is conductivity and pH value of dm water?
ph of DM water is 6.5 to 7.1 conductivity of Dm water is near 000
What are the quality maintain for dm Water?
what will be the TOC content in DM water
What is the unit of conductivity of dm water?
Unit of dm water conductivity is microsiemens/cm
How OBR calculated for DM plant having SBC and SBA?
DM plant OBR is calculated by knowing the following things. 1.Total ionic load this can be found in raw water quality. 2.Total exchange capacity of resins 3.Quantity of resin in ion exchange vessel vessel 4.Flow of water
What is obr of dm plant?
Output between regeneration it called as when we regenerate the dm plant after we taking that selected vessel in service it will completed the design output is called as mbr
Why sodium only slips than other ions in SAC in dm plant?
what are main reasons for slippage of sodium and silica in sac in dm plant what are steps to take for eliminating the slippage of sodium and silics
What is the procedure for preparations of DM water for power plant operation?
There will be an ion exchange type demineralised water plant on the power station, operation is pretty standard, but the quality of the local supply will make some difference in the procedures, whether it is acidic or alkaline for example.
What is the kinematic viscosity of Demineralised water?
viscocity of dm water
What is the shelf life of demineralised water?
shelf life of DM Water
