The use temperature of a single bag filter is an important basis for design, and the temperature error sometimes has serious consequences. This is because the temperature is subject to the following two conditions: 1. The high temperature tolerance (instantaneous temperature and long-term use temperature) allowed by the material of different bags has strict constraints. 2. To prevent condensation, the gas temperature is kept above the dew point, generally above 30 degrees.
For high temperature dust, cool the dusty gas to a temperature that the dust bag can withstand. Under normal circumstances, the investment cost of a single bag filter for high temperature gas is high, and air cooling facilities also require funds. The cooling method should be determined according to the temperature and air volume formed by the production process, and the economical processing temperature should be determined considering the size of the single bag filter. Ordinary higher temperature gases, if they contain large amounts of moisture and sulfur oxides, cannot be cooled to low temperatures because the acid dew point of the SOx containing gas is higher.
The relationship between the processing temperature of the single bag filter and the dust removal efficiency is not obvious. In most cases, the outlet concentration is required in mg/m3, and it should be noted that this is quite different from the dust concentration calculated in g/m3 at high temperature filtration. When dealing with high-humidity gases whose temperature is close to the dew point, if the trapped dust is deliquescent, it should be mixed with high-temperature gas to reduce the relative humidity of the gas.