An easy-to-clean dust filter bag

Abstract

The invention relates to the environmental protection field, in particular to an ash easily removable filter bag. The filter material for preparation of the filter bag comprises a base cloth layer anda fiber mesh layer, the base cloth layer has a negative Poisson's ratio, and the fiber mesh layer is compounded on the base cloth layer by needle punching technology. Compared with the prior art, theinvention provides the ash easily removable filter bag, when ash removal is conducted on the filter bag, primary dust can be protected from being destroyed as much as possible while secondary dust isfully cleaned up. At the same time, during ash removal, secondary dust can be fully cleaned under the circumstance of a small flap force. According to the filter material used by the filter bag provided by the invention, through cooperation of the base cloth layer with a negative Poisson's ratio and the fiber mesh layer compounded to the same by needle punching, fine adjustment of gaps inside thefilter material can be realized. In addition, the filter bag provided by the invention also has the advantages of simple making process, high production efficiency, convenience for mass industrial production, etc.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to an easy-to-clean filter bag. Background technique [0002] Bag filter, electrostatic precipitator and Venturi scrubber are internationally recognized three major dust removal equipment for particle control. Under different working conditions, the three major dust removal equipment have their own advantages and disadvantages. Among them, the bag filter is the dust collector with the widest application range, the strongest adaptability and the highest purification efficiency among the three major dust removal equipment. [0003] The particle size of the dust particles contained in the gas (such as flue gas) filtered by the filter bag is usually in microns, and some are even smaller than 0.1 μm. The porosity in the filter material prepared by general woven cloth or needle felt can reach tens or even hundreds of microns. When the filter material filters dust, because the po...

AI Technical Summary

Problems solved by technology

However, in the prior art, the dust is cleaned by beating the filter bag. If the strength of this cleaning method is not well controlled, the primary dust will be destroyed.

Therefore, it is necessary to reduce the beating strength when cleaning the dust, but reducing the beating strength may make the secondary dust not fully cleaned.

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