Nowadays, thermal energy production mainly uses coal. But there are now energy-saving power plants, and some also use straw to generate electricity, such as the Suqian project of China Energy Conservation Power Generation Co., Ltd. no by-products.
Coal-based electricity generation There are ash and hot water as by-products. But the most troublesome byproduct is combustion gas. It contains a lot of sulfur, nitrogen oxides, etc. The state requires desulfurization and denitrification, so the byproducts are more complicated. It depends on the desulfurizer used.
The most commonly used raw material in China is now CaO. desulfurization is used, the product will be gypsum, etc.
If other dry or semi-dry desulfurization methods are used, there will be a lot of CaS04 Etc. There are also desulfation methodsuration of seawater, which have essentially no by-products. Ammonia desulfurization method produces ammonia acid sulfate and other products.
After dust removal, there is still a lot of fly ash left, which is used in the construction industry .
p >What is thermal energy production
The use of coal, oil, natural gas and other fossil fuels to produce electricity is called thermal power generation.
Figure 1 is a schematic diagram of the production process of a thermal power plant. The main equipment of a coal-fired power plant consists of boilers, steam turbines, generators and corresponding auxiliary equipment: water is heated in the boiler to form superheated steam at high temperature and high pressure , which is sent into the steam turbine through pipes. to develop andcarry out work continuously, which makes the rotor of the steam turbine rotate at high speed, and the steam turbine drives the generator to produce electricity. The temperature and pressure of the steam (waste steam) that has finished the job is very low. The spent steam enters the condenser and is cooled into condensed water. The condensate water is amplified by the condensate water pump and sent to the heater for heating and to the deaerator for deaeration. Finally, the water is further boosted by the feed water pump and enters the boiler to start the next feed cycle. The electricity generated by the generator is amplified by the transformer and then injected into the electrical network.