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Several key points that should be controlled in the selection of dust removal cloth bag

Time : 2023-06-28 Hits : 13

In a bag filter, dust is attached to the surface of the filter bag. When the dust gas passes through the dust collector, the dust will be blocked on the surface of the filter bag, and the clean gas enters the filter bag through the filter material. The cage in the filter bag is used to support the filter bag, avoid the collapse of the filter bag, and help clean and redistribute the filter cake. The fabric and design of dust removal bag shall aim at efficient filtration, easy dust removal and durability. The selection of dust removal cloth bag is more important, which directly affects the dust removal effect. The selection of dust bag is mainly from the aspects of gas temperature, humidity, chemical properties of tide, particle size, dust concentration, wind speed, dust removal mode, etc.

In the process of dust removal, it is generally believed that when the dust is blown to the middle of the dust bag, the middle of the dust bag will shrink to shrink, so as to achieve the effect of removing the dust. In fact, in the process of blowing and observation in the oscillogram laboratory, the air quality of the pulse is rushed to the dust bag, making the dust bag vibrate rapidly from top to bottom, and the dust bag of the dust layer is blown under vibration and pressure. When it is too high, the amplitude is too high, resulting in dust flying, leading to two kinds of adsorption. It is good for the injection pressure with appropriate amplitude to form blocks and scattered.

The large-scale low-pressure long bag pulse dust collector is a dry-type high-efficiency dust collector. It is a dust removal installation that uses bag filter elements made of fiber woven fabric to capture solid particles in dusty gas Its action principle is that when the dust particles bypass the filter cloth fiber, they are intercepted due to the impact of inertial force with the fiber Fine dust particles are impacted by gas molecules and change their movement direction from time to time. Because the gap between fibers is smaller than the free path of Brownian motion of gas molecules, dust particles collide with fibers and are separated; Its working process is related to the weaving method of filter material, fiber density, dust diffusion, inertia, shielding, gravity and electrostatic action and its ash removal method; Filter cloth material is the key of bag filter. In addition to specific density and air permeability, high-temperature bag should also have good corrosion resistance, heat resistance and high mechanical strength.

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