Acid regeneration acid mist recycling and purifying device

Abstract

The invention relates to an acid regeneration acid mist recycling and purifying device. The acid regeneration acid mist recycling and purifying device comprises a mixing tower, a condensing tower, an acid liquid recycling tank and an induced draft fan. An upper air outlet of the mixing tower is connected with a lower air inlet of the condensing tower. An upper air outlet of the condensing tower is connected with the induced draft fan. The mixing tower is an acid mist and water mist mixing tower. A water mist spraying assembly is installed at the upper portion of the mixing tower. The mist inlet section of the water mist spraying assembly is connected with an atomizer fixed to the mixing tower. A condensing fin assembly is installed in the condensing tower and communicated and connected with a refrigerating unit. According to the acid regeneration acid mist recycling and purifying device, the atomizer is introduced in the mixing tower for the first time, the acid mist and the water mist are mixed and then cooled to be absorbed, on one hand, the acid mist can be recycled, and on the other hand, the acid mist can be cooled; dual effects are achieved, and the purifying efficiency is improved.

Description

technical field [0001] The invention belongs to the field of energy-saving equipment, in particular to recovery and purification equipment for acid regeneration and acid mist. Background technique [0002] At present, there are hundreds of cold-rolled pickling equipment in my country. During the production process, new acid must be continuously added to ensure the concentration and cleanliness of the acid solution. The replaced waste acid mist is used for acid regeneration. The traditional process is the roasting method. , but in the roasting process, a large amount of high-temperature and high-concentration acid mist will be produced. The traditional process of purifying acid mist is spray washing method, but the disadvantage of this process is that it cannot remove the acid mist to the maximum extent, and the emission cannot reach to national standards. Moreover, washing needs to consume a large amount of tap water, and the acid water after washing is directly sent to the n...

AI Technical Summary

Problems solved by technology

[0002] At present, there are hundreds of cold-rolled pickling equipment in my country. During the production process, new acid must be continuously added to ensure the concentration and cleanliness of the acid solution. The replaced waste acid mist is used for acid regeneration. The traditional process is the roasting method. , but in the roasting process, a large amount of high-temperature and high-concentration acid mist will be produced. The traditional process of purifying acid mist is spray washing method, but the disadvantage of this process is that it cannot remove the acid mist to the maximum extent, and the emission cannot reach to the national standard

Moreover, washing needs to consume a large amount of tap water, and the acid water after washing is directly sent to the neutralization treatment station for acid-base neutralization, which not only wastes the acid solution, but also wastes the alkali raw material. waste residues cause secondary pollution), and also have a negative impact on the environment, increasing the unit cost of production

At the same time, the acid mist is only sprayed and washed through the purification tower, which is difficult to meet the current national emission standards

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