In the production of the chemical industry, especially the inorganic chemical basic material industry, due to the large use of various ores as raw materials, the dust generated in the crushing, grinding, transmission and other links, as well as the exhaust smoke and dust generated in the production process, become the production dust of chemical enterprises. main source. Common combustible dusts in the chemical industry include polyolefins, plastics, resins, cellulose acetate, sulfur powder and coal powder. Due to the presence of flammable, explosive and toxic chemicals in the chemical production process, once a dust explosion accident occurs, it is easy to cause a chain reaction, resulting in major leakage, fire or explosion accidents, often causing extremely serious casualties and huge losses to the enterprise. .
According to the working conditions of the chemical industry, Hengze Environment has launched a dust removal bag specially used for dust control in chemical plants. The chemical industry adopts high-strength and corrosion-resistant dust collector bags, which can effectively filter the dust of chemical plants and prevent the occurrence of dust explosions. At the same time, it also purifies the factory environment and protects the health of employees.
In the case where the flue gas temperature of the chemical plant is lower than 120 °C, and the filter material is required to have acid resistance and durability, polyester needle-punched felt dust removal bags, acrylic dust removal bags, and polypropylene dust removal bags can be selected.
The properties of dust include chemical and physical properties of dust. The selection of material, structure and post-processing of the filter material is mainly considered from the perspective of the physical properties of the dust. These properties mainly include the shape and particle size distribution of the dust, the adhesion and cohesion of the dust, the hygroscopicity and deliquescence of the dust, and the abrasiveness of the dust.
The working mechanism of polyester needle-punched felt dust bag dust removal is that the dust-laden flue gas passes through the filter material, and the dust particles are filtered. . The dust layer of the filter material also has a certain filtering effect. Polyester needle-punched felt is resistant to acid and weak alkali. It has good wear resistance, corrosion resistance and recovery, and poor electrical conductivity. The dust removal efficiency is high, the gas emission concentration is low, the continuous operating temperature is 130 °C, and the instantaneous temperature can reach 150 °C.
The cleaning method of the bag filter is a major factor in selecting the type of filter material structure. Due to the difference in cleaning energy and filter bag deformation characteristics of bag filters with different cleaning methods, filter materials with different structures and varieties should be selected.
