Double-cone type filter bag

Abstract

The invention relates to a double-cone type filter bag which comprises a bag mouth, an outer conical bag, an outer drawing strip, an inner drawing strip and a conical bag buckle, wherein the outer drawing strip is sewed at the inner side of the bag mouth, and the bag mouth is sewed at the end of the heavy caliber of the outer conical bag. The double-cone type filter bag is characterized in that an inner conical bag is arranged in the outer conical bag, the minor caliber end of the outer conical bag and the heavy caliber end of the inner conical bag are both open ends and the edges of the minor caliber end and the heavy caliber end are mutually sewed. The invention reduces the problem of the compressed gas quantity required for ash removal, cancels the bag bottom, increases the inner conical bag and changes the original straight bag into an outer conical bag, the diameter of the bag bottom of the outer conical bag is equal to that of the bag bottom of the original straight bag, and the diameter of the bag mouth of the outer conical bag is larger than that of the bag mouth of the original straight bag, therefore, the filtering area of the outer conical bag is larger than that of the original straight bag, and meanwhile, an empty opening formed after the bag bottom is canceled is utilized as the inlet for the dusty gas to enter in the inner conical bag, therefore, not only the filtering area is increased, the volume of filling the compressed gas is reduced during the ash removal, the manufacturing cost of the device and the occupied land due to the increased appearance of the device are subtracted, and meanwhile, the operating cost is also reduced.

Description

(1) Technical field [0001] The invention relates to a filter bag, in particular to a compound cone filter bag in a bag filter. (2) Background technology [0002] The double-cone filter bag is a new type of filter bag. Its function is to use the cone-type outer wall of the filter bag and the cone-type inner wall embedded in the filter bag to filter, increase the filter area of ​​the filter bag, improve the filter capacity, and reduce the filter capacity. The inner volume of the bag reduces the volume of compressed gas during dust removal. At present, the common filter bags are cylindrical or rectangular straight filter bags, and their structures are all cylindrical with one end open, the side wall and the bottom are closed, so the filter area of ​​the straight filter bag is the area of ​​the side wall and the bottom area of ​​the straight bag. Sum. When working, the dust-laden gas enters the inside of the filter bag from the outside to the inside through the side wall and b...

AI Technical Summary

Problems solved by technology

When a number of straight filter bags are combined to form a bag filter, if you want to increase the filtration area, you must add more filter bags, and you need to increase the shape of the bag filter, increase the floor space, and increase the cost of the equipment

In addition, the compressed gas must be filled with the entire inner cavity of the filter bag to achieve dust removal. At the same time, because the dust on the outer wall of the straight filter bag is easy to accumulate, the amount of compressed gas required for dust removal is large, and the operating cost is high.

The current methods to solve this problem are focused on changing the material of the filter bag, lengthening the filter bag, and changing the cleaning method. It is also unavoidable to avoid the problem of operating costs caused by the large amount of compressed gas for cleaning dust, and at the same time increases the investment

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