Pre-charging gravity dust collector and dust collecting method thereof

Abstract

The invention relates to a pre-charging gravity dust collector and a dust collecting method of the dust collector; the pre-charging gravity dust collector comprises a dust collector shell; an air inlet pipe and a dust outlet pipe are respectively arranged at the upper end and the lower end of the dust collector shell; a spiral dust conveying machine is arranged in the dust outlet pipe; an air outlet pipe is arranged on the wall of the dust conveying machine; a lower port of the air inlet pipe is connected with a trumpet-shaped inlet diffusion pipe; an umbrella-shaped dust collecting electrode is arranged under the inlet diffusion pipe and is overlapped on a supporting point of the inner wall of the dust collector shell; a dust leaking hole is arranged on the surface of the dust collecting electrode; a direct-current power source is added between the inlet diffusion pipe and the dust collecting electrode; the dust collecting electrode serves as a positive electrode of the power source; the inlet diffusion pipe serves as a negative electrode of the power source; and the dust collector shell is grounded. For the preloading electric gravity dust collector, negative ions are used for transmitting electrons, the electrons collide with dust particles under the effect of electrostatic force so that the dust particles are charged; the charged dust particles and the uncharged dust particles are mutually bonded and continuously enlarge after colliding with each other; and the dust collecting efficiency of the gravity dust collector is improved under the combined effect of the enlargement of dust particle sizes and electric filed force.

Description

technical field [0001] The invention relates to a dust collector, in particular to a pre-charged gravity dust collector and a dust removal method thereof. Background technique [0002] About 30% of the calorific value of the coke and coal used in the blast furnace is converted into the chemical heat contained in the top gas. Therefore, making full use of the energy of the gas and collecting pure blast furnace gas are of great significance for energy saving. The blast furnace gas drawn from the blast furnace contains a lot of dust, which must be treated with dust removal. The gravity dust collector has the advantages of simple structure, easy maintenance, durability, and less pressure loss; its disadvantage is that it is only suitable for capturing particles with an equivalent diameter greater than 50 μm, and the dust removal efficiency is generally only 40-50%, especially for particles with an equivalent diameter less than 50 μm The dust removal efficiency of fine dust is v...

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Problems solved by technology

[0004] The object of the present invention is to provide a pre-charged gravity dust collector and its dust removal method, which solves the defects of the dust removal efficiency of the dust collector in the prior art that is too low and cannot be finely removed and can only be used as a rough dust collector for multi-stage dust removal.

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