Leaching waste gas treatment tower

Abstract

The invention relates to the field of chemical purification of exhaust gas and discloses an exhaust gas extraction treatment tower. The exhaust gas extraction treatment tower comprises a plurality of treatment units. The treatment unit comprises a conduit and a tubular housing. The tubular housing has an open upper end and a closed lower end. The outer diameter of the lower end of the housing is smaller than the inner diameter of the upper end. The bottom surface of the housing is provided with a gas pipe. The gas pipe is parallel to the housing. The gas pipe has an open lower end and a closed upper end. The lower end of the gas pipe passes through the bottom of the housing. The side wall of the gas pipe is provided with exhausting holes. A flow baffle plate is arranged at the top of the gas pipe. The inner wall of the housing is provided with a flow baffle ring. An annular flow gap is formed between the flow baffle plate and the flow baffle ring. The bottom surface of the housing is provided with a drainage hole. The cross-sectional area of the drainage hole is greater than or equal to that of the flow gap. The housing below the flow baffle ring is provided with a gas outlet hole fitting to the conduit and the housing above the flow baffle ring is provided with a gas inlet hole fitting to the conduit. The exhaust gas extraction treatment tower can improve the probability of contact between the gas and the alkaline liquid and purification effects in exhaust gas extraction treatment.

Description

technical field [0001] The invention relates to the field of chemical purification of waste gas, in particular to a 2 S, SO 2 Gas environmental protection treatment equipment. Background technique [0002] Coal powder reduction Glauber's salt method is to combine Yuanming powder (anhydrous Glauber's salt) and coal powder into the converter, carry out reduction reaction at high temperature, and leaching and evaporating the crude alkali obtained from the reaction to obtain flake NaS 2 . In the process of alkali production, the leaching waste gas generated in the leaching stage contains H 2 S, SO 2 Acidic gas, if the leaching waste gas is directly discharged into the air, it will cause air pollution to the atmosphere, [0003] In the prior art, the waste gas treatment tower is usually used for the treatment of acid waste gas. The waste gas treatment tower uses the principle of differential contact countercurrent operation, and the corrosion-resistant packing is used as th...

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Problems solved by technology

[0004] In the waste gas treatment tower in the prior art, when the leached waste gas is purified by the tower body, only the waste gas in contact with the surface of the filler can contact with the lye on the surface to react, and most of the gas side directly passes between the tower body and the filler. The gap cannot be in contact with the filler, and then it cannot be purified, and the purification effect is not good.

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