It is not a fixed value, it changes when the capacity (boiler or generator) changes. The unit of capacity of a steam boiler is T/h, which corresponds to the amount of evaporation per hour and not seconds. Theoretically, it takes a ton of water to evaporate a ton of steam, which is the law of conservation of matter. However, because the operation of the boiler requires factors such as wastewater discharge and leakage, as well as some physical factors, the direct consumption of water to evaporate one ton of steam, i.e. consumption of water entering the boiler, is greater than the evaporation capacity, and generally does not exceed 1.2 tonnes.
What are the water quality requirements for hot water boilers and steam boilers in general industry?
A thermal power plant is a factory that uses coal, oil and natural gas as fuelto produce electrical energy. Its basic production process is as follows: fuel is burned in the boiler to heat the water needed for its operation. into steam and the chemical energy of the fuel is converted. The steam pressure causes the steam turbine to rotate and the thermal energy is converted into mechanical energy. The steam turbine then turns the generator, converting 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 parameters of water are: 22.064 MPa and 373.99 ℃ At this pressure and temperature, the density of water andof steam is the same, what is called the critical point of water. The pressure of the working fluid in the furnace is less than this pressure and is called subcritical boilers, 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. 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 at international and national level, for supercritical and ultra-supercritical unitsrcritiques There is no hard limit, it's just a matter of knowing what the parameter value is. At present, domestic and international people generally think that as long as the main steam temperature 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); power stationsthermal. There are several types of wastewater produced: industrial wastewater, domestic wastewater, coal-containing wastewater, and acid-base wastewater. classification, and the processes are also different.
The regulations stipulate that the hardness of the feed water of hot water boilers is less than 0.6 mmol per liter and that the hardness of the feed water of steam boilers is less than 0.03 mmol per liter. . For In order to effectively prevent hot water boiler scale from affecting the efficiency or even bursting of pipelines, it is generally better to refer to the steam boiler water supply standards for water supply. water from hot water boilers. The hot water boilers in our unit are all compliant. steam boiler water quality standards.
Boiler: a boiler is a mechanical device that uses the thermal energy of a fuelble or other energy to heat the water and transform it into hot water or steam. The original meaning of the word pot refers to a container of water heated over a fire. A furnace refers to a place where fuel is burned. A boiler has two parts: a pot and an oven. The hot water or steam generated in the boiler can directly provide the thermal energy needed for industrial production and people's lives. It can also be converted into mechanical energy via a steam device, or mechanical energy can be converted into electrical energy via a generator. . Boilers that provide hot water are called hot water boilers. They are mainly used in everyday life and also have a small number of applications in industrial production. Boilers that generate steam are called steam boilers, often called boilers, and are mainly usedused in thermal power plants, ships, locomotives and industrial and mining companies.