At present, ceramic filters are more and more widely used in many industrial fields, such as catalytic precious metal recovery, fluidized bed combustion, calcination, organic waste gasification power generation, building materials, chemicals and various industrial kilns, furnaces and other industrial processes Flue gas purification. The application of high temperature flue gas purification will also appear in smelting, material production and glass manufacturing. These high-temperature soot purifications are often carried out under conditions close to atmospheric pressure.
The most prominent application of ceramic filters is soot purification in the field of coal-fired power generation. Because of the increasing demand for electrical energy worldwide, coal is the main source of electricity. With regard to the non-renewable nature of this fossil fuel, maximizing power generation efficiency and reducing pollution to the atmosphere has become a major task for all countries in the world, especially China, a large coal-burning country. The power generation efficiency can be improved by circulating fluidized bed (CFBC) power generation and coal gasification (IGCC) power generation and their combined power generation. Coal gasification power generation is different from the traditional steam engine power generation process. After heating and vaporizing coal, it needs to be purified before the gas enters the gas-fired generator (gas-fired generator). That is, any dust or other impurities must be removed. Most power plants limit the allowable dust concentration into gas-fired engines to less than 5 mg / m. Theoretically, it is better than 1 mg / m. The working temperature of the dust removal system is usually 350 ~ 1000 ℃, and the pressure is 1 ~ 2.5 SPa. Therefore, to achieve such a high purification effect under such high temperature and high pressure, ceramic filters must become the first choice.
