Electric bag composite dust removal device

Abstract

The invention discloses an electric bag composite dust removal device which comprises an electric field area at the front part and an electric bag mixing area at the rear part; the electric field areais mutually communicated with the electric bag mixing area; at least one metal filter bag is arranged in the electric bag mixing area; each of the metal filter bags is taken as an anode and is grounded; the electric bag mixing area further comprises a corona electrode corresponding to each of the metal filter bags, a needle thread is arranged on the corona electrode, and the corona electrode is taken as a cathode; an electric field is formed between each of the metal filter bags and the corresponding corona electrode. The electric bag composite dust removal device disclosed by the invention has the beneficial effects that the dust removal is carried out in a manner of matching of electric field area at the front part and the eclectic bag mixing area at the rear part, most of dust is removed in the electric field area, and residual dust is removed by the eclectic bag mixing area; therefore, not only is the dust removal effect significant, but also the requirements of energy conservation can be really met.

Description

technical field [0001] The invention relates to a purification device for industrial smoke and dust, in particular to an electric bag composite dust removal device with good dust removal effect; the device can be used for boiler flue gas treatment in coal-fired power plants, and can also be used in non-electric industries (such as glass melting furnaces, aluminum industries, Lead industry, metallurgical industry, etc.) flue gas treatment. Background technique [0002] At present, the contradiction between economic and social development and resource and environmental constraints has become increasingly prominent, and environmental protection is facing increasingly severe challenges. Among them, in industrial production processes such as industrial kilns, thermal power, cement, and steel, a large amount of dust generated by fuel combustion is one of the main factors causing air pollution. [0003] Purifying smoke and dust in the process of industrial production is the main m...

AI Technical Summary

Problems solved by technology

This "front charge back bag" structure mainly has the following problems: First, when the charged dust flows from the electric field area into the filter bag area, due to the long flow path, the charge in the dust has been lost, and the dust deposited on the filter bag It no longer has the advantage of charged dust, and it is easy to affect the air permeability of the filter bag, thereby increasing the resistance of the dust collector

Although the main problem of the "front electric rear pocket" structure has been solved theoretically, the patent CN106552469B itself also has the problem of low practical value:

Too many insulation points will not only take up a lot of internal space, but also greatly increase the equipment cost and installation difficulty

[0007] 2. The needle-punched line is installed on the metal filter bag, and there are many solder joints. Not only is it very difficult to manufacture, but the solder joints on the metal filter bag itself will also cause blockage of the mesh, and have a negative impact on the air permeability of the metal filter bag.

[0008] 3. Due to the existence of insulation problems, the metal filter bag cannot be hoisted directly on the flower board, and considering that the length of the metal filter bag is usually more than 7 meters, which is equivalent to the height of two floors, therefore, in order to ensure the flatness of the metal filter bag Straightness, the upper, middle, and lower parts of each metal filter bag need to be supported by insulating support parts, which will become very complicated for a large dust removal device with tens of thousands of metal filter bags

[0009] 4. For large-scale dust collectors, the length of the metal filter bag is often more than 7 meters, and the straightness of the metal filter bag is difficult to ensure within 20mm, so the distance between the acupuncture lines installed on the metal filter bag and the anode plate must be There is a large deviation, which affects the working voltage of the dust collector, so that the efficiency of the dust collector decreases

[0010] 5. The dust collector of this patent only has an electric-bag composite dust removal area. When the dust concentration of the imported flue gas is high, a large amount of dust will directly adhere to the metal filter bag, which will cause a large increase in the resistance of the dust collector and cannot be realized. energy saving requirements

Images