The power plant water supply system is divided into different functions:
Circulating water system - cooling of condenser and various chillers.
Domestic firefighting water system ---- domestic water and firefighting.
Industrial water system ----cooling of rotating machine bearings.
Deionized Water System: The working fluid used by boilers to generate steam.
That's all. I won't talk about small systems.
What are the uses of industrial water pumps and fire water pumps in power plants?
Thermal power plants are factories that use coal, oil and natural gas as fuel to produce electrical energy. Its basic production process Yes: the fuel is burned in the boiler and the heated water is transformed into steam, qwhich converts the chemical energy of the fuel into thermal energy. The steam pressure causes the steam turbine to rotate and generate thermal energy. The energy is converted into mechanical energy. Then the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. Thermal power plants are classified as follows: According to fuel: coal-fired power plants, oil-fired power plants, gas-fired power plants, waste heat power plants, power plants using garbage and industrial waste as fuel; temperature: the working fluids in the boiler are It is water. The critical water parameters are: 22.064 MPa and 373.99°C. At this pressure and temperature, the densities of water and steam are the same, which is called the critical point. The pressure of the working fluid in the furnace is less than this pressure and is called heatdies subcritical, pressures higher than this are called supercritical boilers. The steam temperature in the oven is not lower than 593°C or the steam pressure is not lower. less than 31MPa, which is called ultra-supercritical.
Medium and low pressure power plants (3.92 MPa, 450 degrees), high pressure power plants (9.9 MPa, 540 degrees), ultra high pressure power plants (13.83 MPa , 540 degrees), subcritical pressure power plants (16.77 MPa, 540 degrees), supercritical pressure power plants (22.11 MPa, 550 degrees); from the selection of parameters of supercritical or ultra-supercritical units that have been built and under construction internationally and nationally, for supercritical and ultra-supercritical units There is no hard limit, it is simply to know what the value of the parameter is. At present, domestic and international people peIt is generally believed that as long as the temperature of the main steam reaches or exceeds 600°C, it is considered an ultra-supercritical unit. According to the prime mover: condensing steam turbine power plant, gas turbine power plant, internal combustion engine power plant, steam-gas turbine power plant, etc. depending on the energy produced, condensing steam plant (only produces electricity), thermal; power plant (produces electricity and heat); According to the installed capacity of power plants: small capacity power plants (less than 100 MW), medium capacity power plants (100-250 MW), large and medium capacity power plants (250-1,000 MW), power plants of large capacity (above 1,000 MW); thermal power plants. There are several types of wastewater produced: industrial wastewater, domestic wastewater, coal-containing wastewater and acid-ba wastewatersiques. classification, and the processes are also different.
The water pump adapter is installed to allow the fire truck to squeeze water into the hose. Typically, a check valve is installed between the water pump adapter and the hose (water can only flow out). flow from the water pump adapter to the hose). Pipes caused by special reasonsWhen the internal water pressure is insufficient, use fire trucks to press the water to the pipes (for example, to press the water to the internal fire pipes in case of fire ).