What kind of pump power plants use? What type of pump heat power plants are commonly used?

Referred to as 'power plants, coal-fired power plants is the use of coal, oil, natural gas as fuel to produce electric power plant, its basic process is: fuel combustion in the boiler heating water into steam, turn the chemical energy of the fuel into heat energy, steam pressure to push steam turbine rotate, heat energy into mechanical energy, and then the steam turbine turns the generator, the mechanical energy into electrical energy.

in the thermal power plant thermodynamic system, according to the function is divided into two major systems: the power plant used steam turbine auxiliary pump ( Boiler feed pump, booster pump, condensate pump) Desulfurization of circulating pump ( The main loop desulphurization pump, FGD peripheral pump, the absorber system) With water vapor cycle required for boiler feed water pumps, condensate pumps and cooling water circulating pump, and a front booster pump, low-pressure heater drain pumps and drain pump of high pressure heater and exclude the boiler ash ash pump. Power plant auxiliary cycle or combined circulation boiler steam drum boiler, still need a boiler circulating pump. In coal-fired power plants in the wet flue gas desulfurization system, also install the limestone slurry pump, slurry pump and desulphurization pump such as gypsum slurry pump. Power plants pump quite widely application field.

what kind of pump power plants use? What type of pump heat power plants are commonly used?

1, the boiler feed pumps with the rise of the technical level of the power station, boiler feed pump to develop in the direction of large capacity, high lift, and to ensure safe and reliable operation, even require pump when severe cavitation or interrupt the water still can continue to reliably transfer 'dry' and maintenance is convenient, to reduce the economic loss brought by the unit for parking.

2, condensate pumps

condensate pumps water from the condenser hot well, because of the pressure in the condenser is very low, to avoid condensation pump cavitation, besides its work flow backward conditions, also requires that it has a high resistance to cavitation performance, according to the different requirements of the head, can be a single pump, condensate pump can also be a multi-stage pump, it can be for the vertical pump, can also be for the horizontal axis pump.

3, heater drain pumps

it is also used for transmission of condensed water. Low-pressure heater drain pump from low-pressure heater drain condensate, and transport it to the water supply in the circulation line. High-pressure heater drain pumps, to keep the main steam turbine in partial load can be condensed water in the high pressure heater to the deaerator. Power plants, therefore, drain pumps, especially in low pressure heater drain pumps, is similar to the condensate pump working conditions, the structure also should be the same as the condensate pump of the above characteristics.

4, ash pump ash pump is used to boiler coal ash and slag to the factory place outside or inside the dam.

5, boiler circulating pump in the use of large capacity power plant, the steam drum boiler or compound that was installed in the circulation boiler boiler circulating pump, used to make boiler water forced circulation. head is not high, generally is 30 - 60 m, but the working conditions and harsh. inlet pressure and temperature is very high, must have a good sealing performance, use wet stator shielding pump or more without shaft seal of pump.

       6. Desulphurization pump

in the wet flue gas desulfurization system in coal-fired power stations, also install the limestone vortex pump, the limestone slurry pump, slurry pump and gypsum discharge pump, filter pump, vortex pump wastewater, flue gas desulphurization pump cooling water pump, etc.

7, power plants using circulating pump which is used to supply to the condenser condensate. This kind of pump flow is very big, can be a boiler feed pump flow rate of 50 times, geometry size is bigger also, is a bigger equipment power auxiliary equipment. Because of depends on the capacity of condenser cooling water varies with the seasons, circulating pump flow changes with seasons. This pump is often in a backward state, also often use vertical shaft structure of impeller submerged in the water. Vertical shaft axial flow or centrifugal water pump, can be as a circulating pump.

in addition to the above all kinds of pump, in order to power station main equipment normal work must be equipped with auxiliary machinery and equipment. In these auxiliary equipment and various types of pump application, including:

low power station in the vacuum system vacuum pump, jet water pump

low technical water supply system in the production and living water feed pump

low fuel supply system in various pump

low sewage pump, submersible sewage pump in the sewage system and sewage pump

low fire control system of fire pump when used in the factory water seepage, water sewage pump, submersible sewage pump

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