A kind of flue gas dust removal filter bag

Abstract

The invention relates to the environmental protection field, in particular to a flue gas dedusting filter bag. A filter material for preparation of the filter bag has a double-layer structure. The filter material comprises an outer filter cloth, an inner filter cloth and connecting lines connecting the inner filter cloth and the outer filter cloth. The inner filter cloth serves as a dust-ward layer, and includes a base cloth layer and a 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. The filter bag provided by the invention has a double-layer structure, not only makes full use of the pressure of flue gas itself, but also increases the filtering efficiency. The base cloth layer of the filter material for preparation of the filter bag has a negative Poisson's ratio, can protect the primary dust from being destroyed as far as possible while fully cleaning secondary dust. Atthe same time, during ash cleaning, secondary dust can be fully cleaned up under the circumstance of small flap force. In addition, the filter bag provided by the invention has the advantages of simple making process, high production efficiency, and convenience for mass industrial production, etc.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a flue gas dust removal 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] Existing filter bags usually use a single layer of filter cloth to filter. This kind of filter bag is easy to process, but the filtering effect is average, and the service life is not long. When there are holes in the filter bag, manual inspection is required, the workload is heavy and it is not easy to find. This directly affects the filtr...

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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