Integrated dust-fog removing device and dust-fog removing method for wet desulphurization system

Abstract

The invention relates to the field of flue gas treatment, in particular to an integrated dust-fog removing device and a dust-fog removing method for a wet desulphurization system. According to the device, the principle of glass tube condensation, the principle of screen filtration and the characteristic of different porosities of polytetrafluoroethylene (PTFE) monofilament fibers are utilized to realize the simultaneous efficient purification of original micron-grade solid smoke dust fine particles with different particle sizes and micron-grade fogdrop particles with different particle sizes in flue gas of the wet desulfurization system. After the device is adopted, the micron-grade solid dust and the micron-grade fogdrops in the flue gas can be efficiently removed in an integrated way; furthermore, the device is compact in structure, is easily installed in the wet desulphurization system of the flue gas, and is simple and convenient to operate, thus having wide market prospect and higher promotional value. The device and the method which are provided by the invention are suitable for large-load and high-power wet flue gas desulphurization treatment systems of coal in a power plant, the coal chemical industry, and the like.

Description

technical field [0001] The invention relates to the field of flue gas treatment, in particular to a dust removal-fog integrated device and method for a wet desulfurization system. Background technique [0002] Wet flue gas desulfurization is the most widely used flue gas desulfurization technology at present, that is, the flue gas is washed in the swirl tray with a solution or slurry containing a desulfurizer, so that the sulfur dioxide in the flue gas can be better transmitted in the swirl tray. Under the condition of quality, it can fully absorb and react with the desulfurization liquid, thereby greatly reducing the concentration of sulfur dioxide in the flue gas and achieving the purpose of desulfurization. During the operation of the wet desulfurization absorption tower, it is easy to generate "fog" with a particle size of 3-20 microns. The "fog" enters the rear heat exchanger, fan and flue from the desulfurization absorption tower, which can easily lead to blockage , C...

AI Technical Summary

Problems solved by technology

At present, the existing demisters have disadvantages such as low demisting efficiency, easy blockage, and poor corrosion resistance of the material. The poor performance of the demister in the wet desulfurization system directly affects the continuous and reliable operation of the post-installation device of the wet desulfurization system.

At present, the mist eliminators that have been applied to the wet desulfurization system have been installed in a single-stage form, and the type of the mist eliminator is relatively single. Therefore, the form and structure of the wet desulfurization system demister need to be innovated and improved.

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