16
2023
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06
Is the insulation layer of the bag filter necessary?
Bag dust collectors belong to dry dust collectors. If the operating temperature is lower than the dew point, they will condense into liquid water. The liquid water and dust will mix and cover the surface of the filter screen to form a paste bag, and the filter screen of the bag dust collector will be blocked. When the air temperature is below - tens of degrees Celsius, the smoke on the edge of the shell is easily condensed into water droplets. At the same time, the operating temperature of the bag filter must be above the acid frost point temperature by 25K, and the flue gas temperature must always be maintained above 150 ° C to effectively prevent frost formation. Therefore, the insulation layer of the bag filter is very necessary.
The thermal insulation layer of bag type dust collector is usually made of rock wool, aluminum silicate plate, pearl swelling rock and other thermal insulation materials with poor thermal conductivity, good thermal insulation, low water absorption and long heat resistance. The thermal conductivity of the materials is usually not more than 0.23W/mK.
The insulation layer of the bag dust collector is 100MM, with 50MM on each reinforcing rib. It is laid in two layers in the thickness direction, with staggered seams between the layers. The distance between the seams is more than one-third of the length or width of the board. The insulation layer of the bag dust collector should be fireproof and insulated, and the overall design should be flat and beautiful without affecting the use of accessories. The structure of the insulation layer requires that there should be no less than 8 self-locking gaskets per square meter, and the horizontal spacing of the core pulling aluminum rivets should be 200MM. The outer seams of the insulation layer of the bag filter should be staggered from each other, and there should be no holes in the interlayer and gaps. The insulation density should ensure that it does not collapse during long-term operation.
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