A treatment device for hydrogen chloride by-product in production of potassium sulfate by manheim method

By designing a processing unit for potassium sulfate production using the Mannheim process, hydrogen chloride is converted into concentrated hydrochloric acid, which in turn produces calcium chloride and sodium bicarbonate. This solves the problem of the difficulty in recovering and utilizing hydrogen chloride, and achieves efficient resource utilization and improved economic benefits.

CN224599312UActive Publication Date: 2026-08-07SHANDONG HAIHUA LIWEI NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202521808907.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-25
Publication Date
2026-08-07
Estimated Expiration
2035-08-25

AI Technical Summary

Technical Problem

The hydrogen chloride gas produced as a byproduct in the existing Mannheim process for potassium sulfate production is difficult to recover and utilize effectively, resulting in impurities in concentrated hydrochloric acid, limited market application, and low economic benefits.

Method used

A processing device was designed, including a graphite falling film absorber, an acid mist collector, a mixed acid scrubbing tower, and a hydrochloric acid absorption system, which converts hydrogen chloride gas into concentrated hydrochloric acid and generates calcium chloride and sodium bicarbonate through a limestone reaction, thereby achieving efficient recycling of resources.

Benefits of technology

This technology enables the efficient recovery and utilization of hydrogen chloride, and the co-production of high-value calcium chloride and sodium bicarbonate products, thereby improving economic benefits.

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Abstract

The utility model belongs to chemical equipment technical field discloses a kind of processing device of potassium sulfate by-product hydrogen chloride of mannheim method production, including mannheim furnace, and the acid gas export of mannheim furnace is sequentially communicated to graphite falling film absorber, acid mist trap, mixed acid washing tower and hydrochloric acid absorption system by pipeline, valve, and hydrochloric acid absorption system includes sequentially communicated first-stage absorption tower, secondary absorption tower and hydrochloric acid storage tank;Hydrochloric acid storage tank is sequentially communicated to limestone reactor, three-effect evaporation system, granulation drying system by pipeline, pump and valve;The gas export of limestone reactor is sequentially communicated to carbonization tower, thickener, centrifugal drying system by pipeline and valve.The utility model can recycle and utilize hydrogen chloride generated in production process, and simultaneously co-production calcium chloride and sodium bicarbonate, and processing effect is good, and economic value is high.
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