Dust removing device and method of wet-process flue gas cleaning absorption liquid

Abstract

The invention relates to a dust removing device and a dust removing method of flue gas, in particular to a dust removing device and a dust removing method of wet-process flue gas cleaning absorption liquid. The dust removing device is characterized in that: absorption liquid containing solid particles flows into a first-stage millipore filter through an absorption liquid pipe; a top of the first-stage millipore filter is communicated with a compressed air pipe for importing compressed air and a filtrate outlet pipe, while an outlet on a bottom of the filter is connected with an inlet of a solid particle storage tank through a channel; an inlet on a top of the solid particle storage tank is further connected with the compressed air pipe for importing the compressed air and a washing pipe for importing washing water; an outlet on a bottom of the solid particle storage tank is connected with an inlet on a side surface of a second-stage millipore filter through another channel; an outlet on a top of the second-stage millipore filter is connected with a washing water outlet pipeline; and an openable bottom cover is arranged on a bottom of the second-stage millipore filter. According to the dust removing device and the dust removing method, disclosed by the invention, the removing efficiency of superfine smoke dust are over 90%, energy consumption and material consumption are less, the operation cost is lower than that of the current various traditional separating technologies and some newest separating technologies at home and abroad, and the service life is longer than that of all other separating technologies.

Description

[technical field] [0001] The invention relates to a device and method for dust removal of flue gas, in particular to a dust removal device and method for wet flue gas purification of absorption liquid. [Background technique] [0002] The air pollution caused by combustion flue gas is a difficult problem that all countries in the world must seriously face. Burning coal, fuel oil, natural gas, burning solid waste, various sintering furnaces in the metallurgical industry, and various roasting furnaces in the chemical industry will emit a large amount of waste gas that seriously pollutes the atmosphere every hour. In addition to solid dust, these exhaust gases also contain chemical substances such as sulfides, carbides, and nitrates. At present, many methods are adopted at home and abroad to control these exhaust gases. These methods can be roughly divided into dry treatment, wet treatment, dry first and then wet, or wet first and then dry. Generally, the method of drying fir...

AI Technical Summary

Problems solved by technology

Due to the low filtration efficiency of the filter cloth for dust below 10 microns, diatomaceous earth and other filter aids must be relied on for pre-coating and body filter aids, which consumes a lot of energy, time, and costs; a few companies use ceramic membrane filters, Although the removal efficiency is high, the energy consumption is greatly increased, the operation cost is high, and it is difficult to promote in large quantities

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