A methyl chloride gas sulfuric acid drying treatment system

CN224371060UActive Publication Date: 2026-06-19LIAOCHENG LUXI METHYL CHLORIDE CHEM CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: LIAOCHENG LUXI METHYL CHLORIDE CHEM CO LTD
Filing Date: 2025-07-04
Publication Date: 2026-06-19

AI Technical Summary

Technical Problem

Existing sulfuric acid drying towers in methane chloride production plants suffer from problems such as lagging acid inlet flow control, temperature control defects, and acid mist generation, leading to high equipment corrosion rates and affecting production efficiency and safety.

Method used

An APC system that links a chloromethane gas flow meter with a sulfuric acid flow meter, combined with a series dual-tower structure and temperature feedback control, achieves dynamic molar ratio control and second-level response of the raw material gas and concentrated sulfuric acid. Through gradient dehydration in the drying tower, the generation of acid mist and the risk of corrosion are reduced.

Benefits of technology

It significantly reduces the acid mist content in the dried gas, decreases the equipment corrosion rate, ensures long-term high-load operation of the equipment, and improves production efficiency and safety.

✦ Generated by Eureka AI based on patent content.

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Figure CN224371060U_ABST

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Abstract

This invention provides a system for drying chloromethane gas with sulfuric acid. The system includes a chloromethane inlet pipe, a sulfuric acid desiccant inlet pipe, and a chloromethane outlet pipe. A chloromethane gas flow meter is installed on the chloromethane inlet pipe. The sulfuric acid desiccant inlet pipe is equipped with a sulfuric acid metering pump, an acid inlet heat exchanger, and a sulfuric acid flow meter. A cold medium inlet valve is installed on the cold medium inlet pipe of the acid inlet heat exchanger. A gas phase thermometer is installed on the chloromethane outlet pipe. The chloromethane gas flow meter and the sulfuric acid flow meter are electrically connected to the sulfuric acid metering pump, and the flow ratio of chloromethane to sulfuric acid controls the operating power of the sulfuric acid metering pump. The gas phase thermometer is electrically connected to the cold medium inlet valve, and the gas phase temperature of the drying system controls the opening degree of the cold medium inlet valve. The beneficial effects of this invention are: the acid mist content in the dried gas is reduced by an order of magnitude, significantly reducing the corrosion rate of downstream equipment and pipelines.

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