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General introduction of industrial dust collector
Sep 24, 2018

An industrial dust collector is a device that separates dust from the flue gas. The performance of the precipitator is expressed by the amount of gas that can be treated, the resistance loss when the gas passes through the precipitator, and the dust removal efficiency. At the same time, the price, operating and maintenance costs of industrial dust collectors, the length of service life and the difficulty of operation management are also important factors in considering their performance.
Industrial dust collectors are commonly used in boilers and industrial production. The design and selection of industrial dust collectors is one of the most important aspects in dust removal engineering design. The selection of dust collectors includes the choice of dust collector type capacity and specific requirements for engineering. Choose and so on. Industrial dust collectors are available in dry and wet versions. The dry dust collector has several categories such as a settling chamber dust collector, an inertial dust collector, a cyclone dust collector and a medium dust collector:
The work of the precipitator dust collector uses gravity. The so-called gravity is the attraction of the earth to the object. The dust in the dusty gas is separated in the settling chamber under the action of gravity.
The inertia dust is used to separate the dust from the inertial dust. The inertial force is the state in which the force reflecting the motion state of the material changes when it is subjected to an external force. Under the same force, an object with small inertia is more likely to change its motion state than an object with large inertia, that is, the obtained acceleration is relatively large. This is advantageous for dust separation with low inertia.
The cyclone dust collector uses centrifugal force, which is the centripetal separation force applied to the object that makes a circular motion. It is a separation process based on the separation of the heterogeneous system by centrifugal force in the reaction force of the rotating body. The cyclone dust collector is based on the principle that the centrifugal force generated by the material having a large mass and a high rotational speed during the rotation process is also large.
Media dust collectors generally have a filter cartridge dust collector and a bag filter. The bag filter is suitable for capturing small, dry, non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt. The dust filter is filtered by the filtering effect of the fiber fabric. When the dust-containing gas enters the dust collector, the dust with large particles and large specific gravity settles due to the action of gravity. , falling into the ash hopper, the gas containing finer dust is blocked when passing through the filter material, so that the gas is purified. Generally, the dust removal efficiency of the new filter material is not high enough. After the filter material is used for a period of time, due to the effects of sieve filtration, collision, retention, diffusion, static electricity, etc., the surface of the filter bag is covered with a layer of dust. This layer of dust is called the primary layer. During the subsequent movement, the initial layer becomes The main filter layer of the filter material can rely on the action of the primary layer, and the filter material with larger mesh size can also obtain higher filtration efficiency.
As the dust accumulates on the surface of the filter material, the efficiency and resistance of the bag filter increase accordingly. When the pressure difference between the two sides of the filter material is large, some fine dust particles that have adhered to the filter material are squeezed. , the efficiency of the pulse dust collector is reduced. In addition, the excessive resistance of the bag filter will significantly reduce the air volume of the dust removal system. Therefore, after the resistance of the pulse type dust remover reaches a certain value, it should be cleaned in time. The initial layer should not be destroyed when cleaning, so as to avoid the efficiency drop.