Dry treatment process and dry treatment equipment for waste gas containing viscous dust

Abstract

The invention discloses a dry process for waste gas containing viscous dust. The treatment process uses anti-sticking agent, which is spirally lifted into the waste gas pipeline continuously, in the waste gas pipeline, the anti-sticking agent and the waste gas are mixed quantitatively and evenly in a swirling way, the dust particles with no viscosity are formed, and then the dust particles are removed by the filtering component. The obtained treatment process not only solves the influence of the viscous dust on the dust collector, reduces the filtration efficiency due to the viscous dust, increases the maintenance frequency, and the problem that the processing cost is increased; but also the dust removal efficiency is obviously improved, and the failure effect on the subsequent processingsteps due to the insufficient dust removal rate is effectively avoided; and the method accords with the circular economy and does not generate secondary pollution. The process equipment has the advantages of simple structure, low investment and operation cost, high waste gas treatment efficiency and wide application range, and has remarkable application and popularization value.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a dry treatment process for waste gas containing viscous dust, and also relates to treatment equipment for the treatment process. Background technique [0002] In painting, fertilizer production, FRP production, rubber mixing, galvanizing, smelting, rubber, plastic, kiln and other production operations, the waste gas generated is not only polluted by VOCs, but also often polluted by viscous dust, because viscous dust will not only significantly Reduce the service efficiency and life of conventional dust collectors, and the combination of viscous dust and VOCs will directly affect the treatment effect of VOCs equipment, resulting in the intractability of this type of waste gas. [0003] Taking paint spraying exhaust gas as an example, there are five main treatment methods for spray painting exhaust gas in the prior art: activated carbon adsorption method, catalytic com...

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Problems solved by technology

[0002] In painting, fertilizer production, FRP production, rubber mixing, galvanizing, smelting, rubber, plastic, kiln and other production operations, the waste gas generated is not only polluted by VOCs, but also often polluted by viscous dust, because viscous dust will not only significantly Reduce the service efficiency and life of conventional dust collectors, and the combination of viscous dust and VOCs will directly affect the treatment effect of VOCs equipment, resulting in the refractory nature of this type of waste gas

[0003] Taking paint spraying exhaust gas as an example, there are five main treatment methods for spray painting exhaust gas in the prior art: activated carbon adsorption method, catalytic combustion method, washing absorption method, direct combustion treatment method, and photocatalytic treatment method. Although each has its own advantages and disadvantages, its common disadvantage is that it is extremely susceptible to failure due to the influence of viscous dust such as paint mist.

At present, disposable dry filters such as filter cotton and filter paper or water spraying process are widely used in the pretreatment of paint mist. Among them, the efficiency of water spraying is the highest, about 80%, but the treatment rate cannot meet the follow-up VOCs Residual viscous dust will quickly reduce the efficiency of subsequent treatment equipment, and it needs to be treated regularly with washing liquid. After use, the waste water of washing liquid contains toxic substances such as benzene and xylene, and specific waste water treatment is required.

In practice, most of the emission units that produce this type of waste gas are automobiles, sheet metal, machinery, furniture and other types of enterprises. Usually there is no self-established sewage treatment station, and they can only be discharged to domestic sewage treatment stations. This type of washing liquid waste water is likely to cause sewage The death of microorganisms in the treatment station affects the treatment effect of the sewage station

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