Tail gas recovery system for naphthalene water reducer

Abstract

The invention relates to a tail gas recovery system for a naphthalene water reducer. The tail gas recovery system comprises an inclosed naphthalene recovery room, a waste liquor tank, an inclosed spray tower, a water tank, a blower and a chimney, wherein the naphthalene recovery room is connected with the waste liquor tank and the spray tower via pipelines; the top of the spray tower is sequentially connected with the blower and the chimney via a pipeline; the bottom of the spray tower is connected with the water tank via a pipeline; pipelines used for introducing condensed tail gas and sulfonated tail gas are arranged on the naphthalene recovery room; a pipeline used for introducing neutralized tail gas is arranged on the spray tower. The tail gas recovery system can purify tail gas of the naphthalene water reducer and reclaim industrial naphthalene therein.

Description

technical field [0001] The invention belongs to the field of chemical production equipment, and in particular relates to a tail gas recovery system of a naphthalene-based water reducer. Background technique [0002] The production process of naphthalene-based water reducers is usually formed by industrial naphthalene being sulfonated with concentrated sulfuric acid at high temperature, hydrolyzed, condensed with formaldehyde, and then neutralized with alkali. Therefore, during the production process of naphthalene-based water-reducers, sublimated naphthalene, Tail gas such as sulfuric acid and formaldehyde volatiles, among which, the tail gas produced in the sulfonation process is composed of sublimated naphthalene and sulfuric acid volatiles, the tail gas produced in the condensation process is composed of sublimated naphthalene and formaldehyde volatiles, and the tail gas produced in the neutralization process is composed of formaldehyde volatiles and Composition of water ...

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Problems solved by technology

Among the above-mentioned exhaust gases, industrial naphthalene is the main raw material for the production of naphthalene-based water reducers. It is not only used in the largest amount, but also expensive. Sulfuric acid volatiles are highly acidic and will corrode production equipment. Formaldehyde has a special pungent smell, which is harmful to human eyes, Nose, etc. have stimulating effect, therefore, if the exhaust gas is discharged directly without treatment, it will cause environmental pollution and loss of raw materials, and increase production costs

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