The flue gas cooler (full name flue gas cooler), also known as low temperature economizer, is used to add flue gas after the electrostatic precipitator. The waste heat recovers heat from the exhaust gas and reduces the flue gas temperature from a higher exhaust temperature. à Adapted to the inlet temperature required by the desulfurization system.
Achieve an energy-saving transformation that significantly reduces the exhaust gas temperature. Waste heat from the flue gas is recovered to heat the condensate, thus crowding out the extraction steam from the turbine, thereby increasing the temperature. turbine power generation and power plant efficiency improvement.
For circulating fluidized bed boiling furnaces, the exhaust gas temperature is generally above 150°C, which is pparticularly suitable for the addition of smoke cooling equipment.
Boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler produces steam, high temperature water or. organic heat carrier with a certain thermal energy.
The original meaning of a 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 a boiler. a stove. The hot water or steam generated in the boiler can directly provide the heat energy required for industrial production and people's lives, or it can be converted into mechanical energy through a steam device, or the mechanical energy can be converted into electrical energy via a generator. .
A cThermal power plant is a plant that uses coal, oil and natural gas as fuel to produce electrical energy. Its basic production process is as follows: fuel is burned in the boiler and heated water is transformed. into steam, which converts the chemical energy of the fuel. 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. Critical water parameterst: 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 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. 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 constructionn at international and national level, for supercritical and ultra-supercritical units There is no hard limit, it is simply a matter of knowing what the value of the parameter 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 only electricity) and heat supply) distributed according to the installed capacity of power plants: small capacity power plants (less than 100 MW), medium capacity power plants (100-250 MW), power plants bigof and medium capacity (250-1,000 MW), large capacity power plants (above 1,000 MW) Wastewater from thermal power plants is produced in several categories: industrial wastewater, domestic wastewater, wastewater containing coal and acid-base wastewater. Specific treatment methods are selected based on classification and processes. are also different.