Aluminum alloy casting waste gas treating device and method

Abstract

An aluminum alloy casting waste gas treating device is characterized in that a gas inlet silencing pipe (2) is welded and introduced to the upper-middle part of a pagoda-shaped spray water tank (1), a U-shaped spiral liquid curtain spray system (3) and a feeding pipe (17) are connected and introduced to the upper part of the gas inlet silencing pipe (2) respectively, and the feeding pipe (17) is integrally connected with a feeding hopper (19) through a feeding valve (18). The aluminum alloy casting waste gas treating device has the benefits that sufficient gas passing cross sections and retention time are provided; good gas flow distribution is generated, so that all gas passing cross sections can be used sufficiently; the device has sound attenuation, noise reduction, strong deodorization performance and high waste gas treating capacity; harmful constituent absorption and purification efficiency is high; an absorption liquid and an adsorbent are recyclable, harmful substances can be changed into useful substances, and secondary environmental pollution is avoided; the structure is simple, and the operation is stable; gas passing resistance is low, and the production efficiency can be increased; the working cost is low, and maintenance is facilitated; the production efficiency can be increased effectively.

Description

Technical field [0001] The invention relates to an aluminum alloy casting exhaust gas treatment technology, in particular to the technical fields of aluminum alloy smelting and low-pressure pouring. Background technique [0002] With the development of casting technology, the new generation of no-hardening furan resin sand molding has been widely used in casting, which not only shortens the production cycle, improves production efficiency, but also improves the appearance quality of castings. However, when the resin sand mold and the core are poured, due to the baking of the high-temperature aluminum alloy liquid, a mixed gas with a pungent odor will be emitted. The mixed gas contains not only sulfur dioxide, nitrogen dioxide, but also a small amount of nitrogen monoxide and hydrogen sulfide. In addition, there will be a very small amount of resin volatiles with high viscosity, such as formaldehyde, phenol, methanol, stupid compounds and other harmful substances. production...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to effectively solve the problem of the treatment of toxic and harmful waste gas produced in the aluminum alloy casting process

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