Desulfuration absorption system capable of deeply purifying flue gas and used for boiler

Abstract

The invention discloses a desulfuration absorption system capable of deeply purifying flue gas and used for a boiler. The system comprises a tower body, wherein the tower body comprises a slurry supply part, a gas inlet part and an electric precipitation part from the bottom up; the electric precipitation part comprises a box body fixed on the tower body, a plurality of anode pipes distributed in the box body, and corona electrodes arranged in the anode pipes in a penetrating manner; the upper ends of the anode pipes are open, and the lower ends of the anode pipes are in seal shapes; gas inlet cavities allowing lower flue gas to enter can be formed among side walls of the circumferentially distributed anode pipes; the upper ends of the gas inlet cavities are in seal shapes; and breathing holes communicated with the gas inlet cavities and the anode pipes are distributed in the side walls of the anode pipes. The system has the following advantages and effects that flue gas flow channels in the electric precipitation part are changed and a flow rate is reduced, so that a purification effect of the electric precipitation part is improved, and exhausted flue gas has higher cleanliness.

Description

technical field [0001] The invention relates to the field of boiler desulfurization treatment, in particular to a boiler desulfurization absorption system for deep purification of flue gas. Background technique [0002] There are various technical methods for flue gas desulfurization. The limestone / lime-gypsum wet flue gas desulfurization process uses cheap and easy-to-obtain limestone as a desulfurizing agent. The lime is crushed and ground into powder and mixed with water to make an absorption slurry. When lime is used as absorbent, lime powder is digested and then stirred with water to make absorption slurry. In the absorption tower, the absorption slurry is contacted and mixed with the flue gas. The sulfur dioxide in the flue gas reacts with the calcium hydroxide in the slurry and the blown air, and the final reaction product is gypsum. At the same time, other impurities in the flue gas can be removed. The desulfurized flue gas passes through the mist eliminator to rem...

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Problems solved by technology

[0004] In this installation, although the absorption of dust and mist is realized through the cathode line and the anode plate, the dust can be adsorbed to the anode plate due to the discharge of the cathode line, but for some dust located far away from the anode plate, The adsorption effect of the anode plate is not very good. At the same time, the through-type setting of the anode plate makes the flue gas move faster on the absorption tower in the straight tube. Therefore, although the whole device is equipped with a wet electrostatic precipitator system, it still can only Absorb part of the dust and mist droplets

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