A device and method for wet flue gas desulfurization combined with fine particle removal

Abstract

The invention discloses a device and a method for synergic wet method flue gas desulphurization and fine grain removal, and relates to flue gas treatment. The device is provided with a flue gas desulfurization washing device, a desulfurization liquid washing system, a desulfurization liquid circulating pump, an acoustic agglomeration device, a droplet trapping device and a flushing nozzle; the flue gas desulfurization washing device, the acoustic agglomeration device and the droplet trapping device are from top to bottom connected in series to form a whole, the lower part of the flue gas desulfurization washing device is provided with a desulfurization flue gas inlet, a desulfurization liquid inlet and a desulfurization liquid outlet, the desulfurization liquid outlet is connected, through the desulfurization liquid circulating pump, with the desulfurization liquid washing system arranged in the flue gas desulfurization washing device, a desulfurization liquid storage area, a desulfurization washing area, an acoustic agglomeration growth area and a droplet trapping area are successively formed from bottom to top in the direction of flow of flue gas; the opposite side position of the acoustic agglomeration device is provided with a sound source, the sound source is connected with a signal generator by a power amplifier, the top of the droplet trapping device is connected with a purified flue gas outlet, the flushing nozzle is arranged above the droplet trapping device, and the flushing nozzle is connected with a flushing water inlet.

Description

technical field [0001] The invention relates to flue gas treatment, in particular to a device and method for wet flue gas desulfurization and fine particle removal. Background technique [0002] Wet flue gas desulfurization is currently the main process of flue gas desulfurization in my country. Although the desulfurization washing process has a certain removal effect on large dust particles, it is powerless to remove fine particles; on the contrary, in the desulfurization process due to The strong contact of gas and liquid, the entrainment of gas and liquid, and the crystallization of multiphase reaction will cause the desulfurization products to be discharged with the desulfurization flue gas, so that the emission concentration of fine particles in the flue gas will increase after desulfurization. Studies have shown that the fine particles at the flue gas outlet of coal-fired power plants installed with limestone / gypsum desulfurization systems are mostly PM 2.5 , in additi...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the flue gas of the existing wet flue gas desulfurization process contains a large number of mist droplets, the removal of fine particles in the wet flue gas desulfurization process is difficult, the removal process is complicated, and the required energy consumption is high. Acoustic waves simultaneously make the fine particles and mist droplets in the desulfurization flue gas reunite and grow up, control the emission of fine particles and mist droplets in the wet desulfurization flue gas, and can simultaneously solve the problem of high mist content in the wet desulfurization exhaust flue gas. A wet flue gas desulfurization Apparatus and method for synergistic fine particle removal

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