Ceramic filters are more and more widely used in many industrial fields, such as catalytic noble metal recovery, fluidized bed combustion, calcination, organic waste gasification power generation, building materials, chemical and various industrial kiln, furnace and other industrial processes of high temperature 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 purification is usually carried out under the condition of 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 electric power worldwide, coal is the main source of electricity. For the non-renewable nature of this fossil fuel, maximizing the efficiency of power generation and reducing the pollution to the atmosphere has become a major task for countries around the world, especially China, a big coal-burning country. Circulating fluidized bed (CFBC) power generation, coal gasification (IGCC) power generation, and combined power generation can achieve the purpose of improving power generation efficiency. Coal gasification power generation is different from the traditional steam engine power generation process. After the coal is heated and vaporized, the gas needs to be purified before it enters the gas-fired generator (gas turbine). That is, any dust or other impurities must be removed. Most power plants limit the allowable dust concentration into the gas turbine to less than 5 mg/m3. Ideally below 1 mg/m3 in theory. The operating temperature of the dust removal system is often 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 filter will inevitably become the first choice.