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 For this purpose, a storage tank is installed from which DM water is continuously withdrawn for boiler make-up.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.
Ionic load, OBR, Out put quality required. Ionic load, OBR, Out put quality required.
Design Basis Life Expectancy of a Nuclear Power Plant is 40 years.
Plant Design Management System. This softwere is used for 3d designing of offshore platfroms, refineraires, chemcial plant, power plant etc.
Approximately 33%, depending on the design. That's measuring from reactor thermal power to final electric power.
7.85 kg/dm^3
PV Elite is a software package from COADE, Inc. for the design and analysis of pressure vessels and heat exchangers. The package bi-directionally links to COADE CADWorx Plant Design Suite and COADE PV Fabricator for automation of the production of pressure vessel drawings.
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
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
12 dm.12 dm.12 dm.12 dm.
7m.........dm
Since 1 m = 10 dm, then 1 m 60 dm + 30 dm = 70 dm + 30 dm = 100 dm = 10m or 1 m 60 dm + 30 dm = 1m 90dm = 10 m.
it is squarish and flattish
Utility, Design, and Plant.
dm = decameter 1 dm = 10 m answer: 50 dm
It is: 3.4+5.65+6.85 = 15.9 dm
1 m = 10 dm ⇒ 1374 m = 1374 x 10 dm = 13740 dm
dm and dm refer to the same unit, decimetres. Therefore, 25 dm is equal to 25 dm (decimetres). Another, similar unit, the decametre, is abbreviated dam.
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