For a dust removal system, when the purification target of the pulse bag filter is clear, a reasonable filtration speed is selected according to the nature of the process gas and the dust, and the required filtration area is calculated from the processed air volume. For a dust removal system, when the purification target of the pulse bag filter is clear, a reasonable filtration speed is selected according to the nature of the process gas and the dust, and the required filtration area is calculated from the processed air volume. According to the selected cleaning method, the size of the valve and the layout of the site, the specifications of the filter bag are determined, and then the number of filter bags is calculated. In the design, the dust removal efficiency and the allowable air leakage are also calculated. If the pulse is blown, the bag filter is removed. It is also necessary to calculate the amount of compressed air.
There are many types of pulse bag filter, including MC-II type, PPC air box pulse dust collector, DMC pulse dust collector and other common models. The determination of these models is determined according to the actual application of each industry. The pulse pulse bag filter bag diameter specification range is generally φ120~165, and the tube spray pulse dust collector is most commonly used φ130 and φ160. A pulse dust collector that handles large amounts of air currently uses a bag diameter of φ160. The length of the filter bag is generally 2~8m, and the longest is not more than 10m. The value of the bag length is related to the cleaning method of the dust collector. The length of the tube spray pulse dust collector is 6m or more. Generally, the filter bag is long and the bag diameter is also large, so that the wind speed of the bag mouth is prevented from being too high. For the box spray pulse dust collector bag length is generally no longer than 4 m, the common use of the reverse blow dust collector is φ180, φ300, bag length 6 m and 10 mm.
The cleaning gas source required for the pulse bag filter is divided into high pressure, medium pressure and low pressure. It is generally considered that the injection pressure is 0.5 to 0.7 MPa for high pressure, 0.3 to 0.5 MPa for medium pressure, and 0.3 MPa for low pressure. The common size (42, 60, 89, and 89A) of the cleaning pulse valve are 1.5′, 2′, and 3′, respectively. The 89A has a small outer shape and is suitable for use in a small-pitch pulse nozzle.
The main technical parameters of the bag filter include process gas flow rate, filtration wind speed, dust removal efficiency, imported dust concentration, discharge concentration, filter bag size, dust frame specification quantity, electromagnetic pulse valve specification quantity, pressure loss, air leakage rate, and steel consumption. , the size of the induced draft fan model, the length and width of the dust collector.