Complete-treatment process for waste gas generated during casting

Abstract

The invention discloses a complete-treatment process for waste gas generated during casting. The process comprises the following steps of S1, positive pressure conveying, namely, conveying the waste gas generated during casting to the rear end in a positive pressure purging manner; S3, negative pressure collection, namely, forming negative pressure in a preset area of a sealed casting space, capturing the waste gas conveyed through positive pressure in a negative pressure area and introducing the waste gas into a casting space with the sealed rear end to be stored; S4, spraying and absorbing; and S5, deodorizing. According to the treatment process, a mode of combining positive pressure conveying and negative pressure collection is adopted, the waste gas is conveyed to the negative pressure area at the rear end by positive pressure purging gas and is collected and stored, and an expected waste gas collection effect can be achieved only by adopting a small-power positive pressure fan and a small-power negative pressure fan; compared with the prior art, the waste gas collection efficiency is improved, and the power consumption of waste gas collection is greatly reduced; and in addition, the waste gas is subjected to spraying absorption and deodorization treatment, so that the environment-friendly requirement can be met, the problems of waste gas collection and treatment in the foundry industry are solved, and the obstacles of industry development are cleared away.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a treatment process for waste gas generated during casting. Background technique [0002] Casting is a method in which liquid metal is poured into a casting cavity adapted to the shape of the part, and after it is cooled and solidified, the part or blank is obtained. With the development of casting technology, no-hardening furan resin and phenolic resin sand molding have been widely used in my country's foundry industry. When the resin sand mold is pouring and cooling, it will emit a strong exhaust gas. [0003] In the prior art, a vacuum negative pressure area is generally formed by a negative pressure fan to smoke dust on the side, but when the side distance exceeds 50cm, there is a problem that the direction of the smoke cannot be changed, the smoke directly rises and escapes, and cannot be guided to the processing system. If you need to obtain a good treatment effect, you ne...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, a vacuum negative pressure area is generally formed by a negative pressure fan to smoke dust on the side, but when the side distance exceeds 50cm, there is a problem that the direction of the smoke cannot be changed, the smoke directly rises and escapes, and cannot be guided to the processing system

If it is necessary to obtain a good treatment effect, it is necessary to use a high-power negative pressure fan for treatment. This treatment method leads to a very large power consumption, which greatly increases the production cost of the enterprise.

Images