Dust collecting bag

Abstract

The invention discloses a dust collecting bag. The dust collecting bag is formed by weaving of modified graphene fibers which are prepared through the following steps: (1) sufficiently dissolving modified graphene and polyamide according to the weight percent ratio of x to y or dispersing modified graphene and polyamide into a solvent to form a spinning solution, and adding polyvinylpyrrolidone (PVP) with the solute mass being 0.1-10% so as to adjust the viscosity of the spinning solution, wherein x is more than or equal to 1% and smaller than or equal to 20%, and x+y is equal to 1; and (2) carrying out electrostatic spinning on the prepared spinning solution, and controlling the spinning voltage to be 7-18KV, receiving distance to be 5-60cm, and extrusion speed to be 0.01-1ml / min in the spinning process, thus preparing the fiber materials. The woven dust collecting bag has the characteristics of high temperature resistance, light weight, high strength, incapability of water absorption, and surface smoothness on the premise of ensuring the same filter efficiency; blockage possibility caused by water absorption of the bag can be effectively reduced, the use efficiency of the bag can be improved, the use service life of the bag can be prolonged, and the replacement and cleaning frequency can be reduced.

Description

technical field [0001] The invention relates to the technical field of bag dust collectors, in particular to a dust bag for bag dust collectors. Background technique [0002] In today's world, due to various problems such as soil damage, climate change, energy waste and greenhouse effect, the intensity of environmental protection is gradually increasing, so the development and application of environmental protection equipment are also increasing. The bag filter is the most common type of environmental protection equipment, so it has a simple structure and principle and low requirements on process parameters, making it the most popular type of dust collector. [0003] The working mechanism of the bag filter is that the dusty flue gas passes through the filter material, and the dust particles are filtered out. The filter material captures coarse dust mainly by inertial collision, and captures fine dust mainly by diffusion and screening. The dust layer of the filter material a...

AI Technical Summary

Problems solved by technology

According to the needs, the cloth or felt is sewn into a cylinder or a flat filter bag, and both kinds of bags have the problem that the busbar on the outer side of the bag is vertically downward, so that when the dust is absorbed on the outside of the bag, the In the absence of pulse injection, the natural falling route of the dust is close to the entire bag surface, which makes the dust falling process on the bag surface have great resistance. The valve sprays each bag to shake off the dust on the surface of the bag. During the blowing process, the main filter air flow needs to be interrupted, which not only reduces the filtration efficiency of the dust collector, but also increases the operating energy consumption of the dust collector. Because the dust-laden flue gas may contain moisture, the bag absorbs moisture and sticks to the dust, causing blockage and other reasons, which affect the efficiency of the equipment

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