Pulse bag filter is a type of dust removal machine that can generally achieve high efficiency without breaking the filter material. Therefore, as long as the design parameters are properly selected, the dust removal effect of the pulse bag filter can be improved.
1. Breathability refers to the amount of gas passing through a unit area of filter material under differential pressure. The resistance of filter media is directly related to its air permeability. As a constant pressure difference for calibrating air permeability, the values vary in different countries. The air permeability depends on factors such as fiber fineness, fiber type, and textile method. The air permeability generally refers to the air permeability of the cleaning filter material. When dust accumulates on the dust removal bag, the air permeability should decrease.
2. The dust holding capacity of the pulse bag filter affects the resistance of the filter material and the cleaning cycle. In order to avoid frequent dust cleaning and extend the service life of the dust removal bag, it is generally required that the filter material has a larger dust holding capacity. The dust holding capacity is related to the porosity and air permeability of the filter material, and felt filter material has a larger dust holding capacity than fabric filter material.
3. The filtration efficiency of filter media is related to both the structure of the filter media and the dust layer formed on it. From the perspective of filter media structure, the filtration effect of short fibers is higher than that of long fibers. Felt filter media is higher than fabric filter media. From the formation of the dust layer, for thin filter media, after cleaning, the dust layer is destroyed and the efficiency is greatly reduced, while for thick filter media, a portion of the dust can still be retained in the filter media after cleaning, avoiding excessive cleaning. Generally speaking, high efficiency can be achieved without breaking the filter material.
As a type of cleaning and dust removal equipment in feed processing workshops, pulse bag dust collectors should pay special attention to taking measures to prevent combustion, explosion, and fire accidents. When processing combustion gases or high-temperature gases in feed processing plants, unburned dust, sparks, explosive gases, etc. often enter the dust removal system. Some dust has the property of self ignition or carries electricity. At the same time, most of the materials used to process feed are prone to combustion or friction, which can accumulate static electricity. Under such operating conditions, pulses pose a serious risk of combustion and explosion accidents. Therefore, measures should be taken well, such as:
1. Install a combustion chamber or spark trap in front of the pulse bag filter to burn unburned dust and gas or collect and capture sparks;
2. Take measures to prevent static electricity accumulation, and use conductive materials to ground all parts of the equipment as much as possible, or add conductive fibers during the cleaning and dust removal process;
3. Prevent the accumulation or buildup of dust in the feed processing workshop, and prevent spontaneous combustion and explosion of dust.
Before entering the dust removal filter bag room or pipeline for inspection and maintenance of feed machinery, operators must be prepared for ventilation and air exchange to prevent carbon monoxide and carbon dioxide poisoning.
