Device and method for controlling fine particle emission in wet flue gas desulfurization

Abstract

The invention discloses a device and a method for controlling fine particle emission in wet flue gas desulfurization. The device includes a wet flue gas desulfurization column, a diffusion-type steam nozzle, a steam mass flow controller, an acoustic wave agglomeration chamber, an acoustic wave generating unit, a mist eliminator and a washing nozzle. In the device, flue gas adjustment, agglomeration and growth of fine particles and a removal effect are integratedly completed in the acoustic wave agglomeration chamber so that defects of low efficiency, high sound pressure level and high energy consumption during the agglomeration and the growth of the fine particles through conventional acoustic wave agglomeration are avoided, and meanwhile, the defect of quite high energy consumption required for achieving oversaturation of flue gas, which is low in moisture content, just by means of addition of steam is overcome when the removal of the fine particles is promoted by means of the steam phase transition principle. The device and the method allows a problem that an adjusting chamber and a phase transition chamber are required to be established at the same time in steam phase transition to be solved, is simplified in a device structure and a operation cost without change of a structure of an original desulfurization column, and can achieve low energy consumption and high efficient of removal of the fine particles in the wet flue gas desulfurization.

Description

technical field [0001] The invention belongs to the field of pollution control equipment manufacturing, and in particular relates to a device and method for controlling the discharge of fine particles from wet flue gas desulfurization. Background technique [0002] Fine particulate matter, especially particulate matter with an aerodynamic diameter of less than 2.5 microns (PM 2.5 ) is the primary pollutant in the urban atmosphere in my country, and coal burning is one of the main sources of fine particulate matter in the atmosphere in my country. With the frequent occurrence of smog and haze, PM 2.5 Pollution has attracted widespread public attention and the government has attached great importance to it. The emission control of fine particulate matter has become a key issue that needs to be solved urgently. However, the current traditional dust removal technology and equipment, for fine particulate matter PM 2.5 The removal efficiency is very low, resulting in a large amo...

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Problems solved by technology

[0005] Purpose of the invention: In order to solve the problems existing in the prior art, the present invention provides a device and method for controlling the discharge of fine particles from wet flue gas desulfurization. The treatment measures overcome the shortcomings of low efficiency, high sound pressure level, and high energy consumption of traditional acoustic wave agglomeration, and solve the problems of difficulty in adding seed particles, high sound pressure level, and troublesome subsequent treatment in the acoustic wave field. At the same time, combined with subsequent dust removal equipment, It realizes the efficient removal of fine particles under the condition of low sound pressure level, and greatly reduces the energy consumption of sonic agglomeration

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