Membrane process dust collection desulfurizer and semi-dry type membrane dust collection desulphurization method

Abstract

The invention discloses a membrane process dust collection desulfurizer and a semi-dry type membrane dust collection desulphurization method. The membrane process dust collection desulfurizer comprises the following components in percentage by mass: 2.5-25% of an electronegativity membrane forming agent, 2.5-25% of a foaming agent and 50-95% of a desulfurizer; the components are uniformly mixed to prepare the membrane process dust collection desulfurizer. The invention also discloses a desulphurization method by using the membrane process dust collection desulfurizer. The membrane process dust collection desulfurizer is wide in raw material source, and simple and convenient to produce; the semi-dry type membrane dust collection desulphurization method is low in equipment investment or technological upgrading investment, simple to operate and good in adaptability.

Description

technical field [0001] The invention relates to the field of environmental protection technology, in particular to a desulfurizer for membrane desulfurization for waste gas purification and membrane condensation of PM10 and PM2.5 fine dust, and a flue gas semi-dry membrane bubble dust collection desulfurization method. Background technique [0002] At present, the flue gas desulfurization process of industrial kilns at home and abroad mostly adopts the flue gas wet desulfurization technology. The desulfurizers used are limestone powder, lime, carbide slag, and soda ash, and the devices used are huge wet desulfurization towers. system; the dry desulfurization process of industrial kilns is mainly used in some special industries such as coal-to-gas production lines, and the desulfurizer used is desulfurizer particles mainly composed of iron oxide and ferrous oxide. These desulfurization technologies require large investment and high operating costs. The government has to adopt...

AI Technical Summary

Problems solved by technology

Although this method can automatically adjust the replenishment of desulfurization absorbent, it still does not solve the problem of large investment and high operating cost

[0005] CN101869824A discloses a flue gas desulfurization agent and a flue gas desulfurization method, using alkylpiperazine, hydroxyalkylpiperazine, hydroxyalkylpiperazinone, piperazine and diazabicyclic as desulfurization absorbents, absorbing and washing Desulfurization is carried out in the tower, but its investment is large and the operating cost is high, so it cannot be used by small and medium-sized kiln enterprises with large quantities and wide areas.

[0006] CN102639211A discloses a method for flue gas desulfurization. Water-based tricalcium aluminate hexahydrate and aluminum hydroxide are used as desulfurization absorbents to make washing slurry, which is desulfurized in a complex and huge wet purification tower system. The investment and operating costs are large high, and its desulfurizer production consumes high energy and is expensive, and it is difficult for small and medium-sized kiln enterprises with large volumes and wide areas to accept

[0007] On the other hand, smog pollution is very serious, which has seriously affected people's health. Large and medium-sized cities have to relocate or shut down coal-fired industrial kiln enterprises. However, industrial kiln smoke is the main source of fine dust pollution. Severe smog in the atmosphere is actually still uncontrollable, because existing dust removal technologies such as cloth bags, electric cloth bags and electrostatic precipitators cannot filter out PM10 and PM2.5 dust

In fact, these positively charged dust drifts in the air for a long time and a long distance, and has a wide range of influence.

[0008] At present, it is recognized that the feasible methods are water washing dust removal, wet foam dust removal and wet foam plus water washing combined dust removal. Extremely poor surfactant foam cannot adapt to the high-flow flue gas environmental conditions of industrial kilns, and the large-flow exhaust gas will tear the water curtain and bring out a large amount of fine dust, resulting in extremely fine dust from industrial kiln flue gas around the world ( PM2.5) is still seriously polluting the atmospheric environment, leading to prominent smog problems. How to solve the pollution of the atmospheric environment by the huge amount of fine dust in industrial kiln enterprises has always been a century-old problem that has plagued technical workers in various countries.