Equipment for incineration treatment and resource application of ammonium-sulfate-containing waste liquid

Abstract

The invention discloses equipment for incineration treatment and resource application of ammonium-sulfate-containing waste liquid. The equipment comprises an incinerator, a waste heat recovery device and a desulfurization device. The incinerator is used for combusting the waste liquid to generate flue gas. The waste heat recovery device comprises a waste heat boiler, the waste heat boiler comprises a first membrane type wall cavity communicating with the incinerator and a second membrane type wall cavity located at the downstream position of the first membrane type wall cavity, and the upper portions of the first membrane type wall cavity and the second membrane type wall cavity communicate with each other. The first membrane wall cavity is used for reducing the temperature of the flue gas to be lower than the melting point of inorganic salt, a convection heating surface is arranged in the second membrane type wall cavity, and the second membrane type wall cavity is used for reducing the temperature of the flue gas to a first preset temperature. The desulfurization device is located at the downstream position of the waste heat recovery device, communicates with the waste heat recovery device and is used for converting SOX into ammonium sulfate and recovering the ammonium sulfate. According to the equipment for incineration treatment and resource application of the ammonium-sulfate-containing waste liquid, acid dew point corrosion of the heating surface of the boiler can be avoided.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a device for incinerating waste liquid containing sulfur ammonium and utilizing it as a resource. Background technique [0002] At present, some chemical wastewater contains a large amount of nitrogen and sulfur. For example, the waste water produced by the acetone cyanohydrin method to produce methyl methacrylate contains more than 40% by mass of ammonium sulfate, ammonium acetone disulfonate and other substances, that is, it contains a large amount of nitrogen and sulfur elements. [0003] Since the flue gas after incineration of the waste liquid containing nitrogen and sulfur elements has the characteristics of large dust content, high concentration of nitrogen oxides and high concentration of sulfur dioxide, it is necessary to treat the flue gas. [0004] Considering the problem of resource utilization, the ammonia desulfurization method is generally used to post-t...

AI Technical Summary

Problems solved by technology

However, the current ammonium sulfate recovery equipment has many problems, such as prone to dew point corrosion, high dust content affecting the quality of ammonium sulfate, excessive NOX content in exhaust gas, excessive sulfuric acid mist and aerosol particles, and emissions The gas is prone to white smoke trailing phenomenon, etc.

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