Descending wet electrostatic precipitation, demisting and ultra-low flue gas emission device

Abstract

The invention relates to a descending wet electrostatic precipitation, demisting and ultra-low flue gas emission device. The device comprises an upper air chamber, a lower air chamber and an electrostatic precipitation device located between the upper air chamber and the lower air chamber; a V-shaped air flow distributor is arranged at the air inlet end inside the upper air chamber; multiple layers of flue gas uniform distribution devices are arranged below the V-shaped air flow distributor; flue gas flow stabilizing devices are arranged below the flue gas uniform distribution devices of the upper air chamber and at the upper part of the lower air chamber; a flushing device is arranged below the flue gas flow stabilizing device inside the upper air chamber; the lower end of the lower air chamber is connected with a flue; a cylinder is arranged outside the lower air chamber; the lower end of the cylinder is connected with a dirt collecting bucket; radial plates are arranged in circular spaces of the flue and the cylinder; and the electrostatic precipitation device is connected with an electrical insulation box and a heating system. The device is simple in structure, the air flow distribution flow resistance is low, flue gas rotates, diffuses and is uniformly distributed in gaps formed by a spherical body group along the surfaces of spherical bodies, the flue gas uniform distribution performance is excellent, the device is convenient to change and clean, the gaps of the spherical bodies are adjustable on a series connection rod, and the precipitation efficiency can be improved.

Description

Technical field [0001] The invention relates to a down-type wet electrostatic dust removal and mist removal flue gas ultra-low emission device, which can be used for air pollution prevention and control, belongs to the technical field of flue gas dust removal, desulfurization and gas purification, and effectively captures microfine particulate matter (PM2.5) dust, SO 3 Acid mist, aerosol, heavy metals, organic pollutants, etc. are suitable for the treatment of flue gas with high temperature and humidity. Background technique [0002] Dust-laden steam flow flue gas is a common pollution emission flue gas in the chemical industry, building materials, iron and steel metallurgy and other industries, and the treatment process of steel slag is one of the typical sources of dust-laden steam flow flue gas. In the process of slag treatment, high-temperature molten slag will produce a large amount of superheated steam when it is quenched by rapid water, and the diffusion of slag dust carrie...

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Problems solved by technology

[0003] Generally, cloth bags, plastic burning plates and electric precipitators are all mature and reliable high-efficiency dust removal technologies at present, which can reach 30mg / Nm3 when applied to the dust removal and purification of dusty steam stream generated in the slag treatment process, but the disadvantages are also obvious: not only the investment And the operation cost is high, the land occupation is large, and the construction period is long. The most important point is that the moisture content of the tail gas is as high as 13-24%, and the dust carried by it is ultrafine powder of steel slag. Hydraulic and gelatinous (congeal) coagulation, deposited on the internal components such as electrodes, plates and other internal components in the micropores of the bag or plastic-fired plate filter, and it is difficult to clean

[0004] Wet electrostatic precipitators are usually used alone, and internal components such as electrodes and plates are easily fouled and difficult to clean

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