Flue gas purification device and method for capturing PM2.5-PM10 by magnetic porous media in traveling magnetic field

Abstract

The invention belongs to the technical field of coal-fired flue gas treatment, and particularly relates to a flue gas purification device and method for trapping PM2.5-PM10 in an advancing magnetic field by means of magnetic porous media. A plurality of magnetic generators are arranged in the flue gas purification device for trapping PM2.5-PM10 in the advancing magnetic field by means of the magnetic porous media. Each magnetic generator comprises a pair of magnet exciting coils. The magnet exciting coils are connected with a multi-channel direct current stabilization power source. The current intensity and the power-on time of the multi-channel direct current stabilization power source are adjusted, and therefore the magnetic field intensity of different positions of a flue gas pipeline can be controlled, and whether a magnetic field exists at different positions of the flue gas pipeline or not can be controlled. By means of the coupling function of electromagnetic attraction force, gravity and gas drag force, the magnetic porous media are driven to trap and separate PM2.5-PM10 particles in flue gas. According to the flue gas purification device and method, the beneficial effects of high separation efficiency, environment friendliness and energy saving are achieved on the PM2.5-PM10 particles in the flue gas.

Description

technical field [0001] The invention belongs to the technical field of coal-fired flue gas treatment, and in particular relates to a flue gas purification device and method for capturing PM2.5-PM10 by a magnetic porous medium in a traveling magnetic field. Background technique [0002] At present, there are varying degrees of smog and air pollution in most parts of the country. One of the main causes of air pollution is that a large number of fine particles are discharged into the atmosphere in the production of coal-fired industries such as thermal power, heating, and iron and steel. At present, due to the lack of industry standards for the classification and dust removal efficiency of PM2.5-PM10 fine dust in flue gas, and the existing dust removal technology has a better dust removal effect on solid particles above PM10, but the dust removal efficiency of fine particles in flue gas Generally not high, therefore, fine dust removal for the flue gas emitted by industrial pro...

AI Technical Summary

Problems solved by technology

However, it is currently impossible to apply porous media filter layers to the removal of flue gas fine particles, mainly because for porous media filter materials, the pore performance and service performance are mutually restricted, and there is a pair of contradictions, that is, the smaller the pore size, the smaller the pore size. The higher the efficiency, the more favorable it is to capture ultrafine particles and the higher the filtration accuracy; but the smaller the fluid penetration is, the easier it is to cause high pressure drop or even blockage

Although porous material fixed filtration can be used in fine dust removal, it is not suitable for treating a large amount of flue gas generated by industrial coal combustion because the pores are easily saturated due to the need for frequent replacement of porous material filter materials.

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