Application of bag-type dust collector in cement production - raw meal grinding and clinker calcination

    The whole process of cement production includes five links: raw material crushing, raw material grinding, clinker calcination, cement grinding and finished product packaging. Each link will produce a lot of dust. Improper treatment will not only pollute the environment, violate the laws and regulations, but also damage the health of operators and affect the production efficiency. With the advantages of high filtration precision, strong adaptability and stable operation, the bag-type dust collector has become the preferred solution for dust control in the whole cement production process.

    Raw meal grinding dust concentration is high (80-200g/m ³), mainly fine particles (0.1-10 μ m), containing alkaline components, with high humidity; Clinker calcination, i.e. kiln head and kiln tail sections, is the core source of high temperature pollution. The temperature of flue gas at kiln head is 120-180 ℃, the temperature at kiln tail is 180-280 ℃, containing corrosive gases such as clinker particles and SO, and the dust concentration is 200-800 g/m ³.

    PPS pulse bag-type dust collector with membrane is selected for raw material grinding. PTFE waterproof membrane is coated on the surface of filter material, which is waterproof and anti-sticking. Alkaline dust is prevented from caking and pasting the bag. The filtration accuracy is up to 99.99%.

    PTFE coated PPS filter material with temperature resistance of 220 ℃ shall be selected for kiln head, and spark trap shall be provided to prevent ignition of filter bag by high-temperature spark.

High-temperature bag-type dust collector is used at the kiln tail, and pure PTFE filter material is used as the filter material. The upper limit of temperature resistance is 260 ℃, and instantaneous high temperature of 300 ℃ can be withstood for a short time.