Sulfur trioxide gas standard generation device and generation method

By designing a standard sulfur trioxide gas generator and employing vanadium-based composite catalysts and segmented condensation technology, the challenges of performance verification and traceability of SO3 gas detection equipment were solved. This enabled the stable preparation and monitoring of SO3 gas, improved detection accuracy, and promoted environmental protection and industrial safety.

CN120939849APending Publication Date: 2025-11-14NATIONAL INSTITUTE OF METROLOGY CHINA
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Patent Information

Application Number
CN202510829444.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2025-11-14

AI Technical Summary

Technical Problem

The lack of a standard SO3 gas in existing technologies poses challenges to the performance verification and traceability of SO3 gas detection equipment, and the preparation and storage of SO3 gas also present challenges.

Method used

Design a standard sulfur trioxide gas generator, including a gas dilution and mixing system, a sulfur trioxide generation system, a heat preservation vaporization system, a detection system, a collection and condensation system, and a tail gas absorption system. Use vanadium-based composite catalyst and silica carrier to prepare composite catalytic particles. Achieve precise control of the concentration and flow rate of the reactant gas through dynamic gas distribution technology. Combine with segmented condensation and quantitative capture technology to achieve stable preparation and monitoring of SO3.

Benefits of technology

This technology enables efficient and stable preparation of SO3 gas, improves the performance and traceability of detection equipment, enhances the accuracy of SO3 gas detection, and contributes to environmental protection, industrial safety, and health management.

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Abstract

The invention discloses a sulfur trioxide gas standard generation device and method, a gas dilution mixing system inputs double gas sources and can realize accurate regulation and control of reaction gas concentration and flow, and the outlet end of the gas dilution mixing system is connected with a sulfur trioxide generation system; the sulfur trioxide generation system comprises a reaction furnace, a quartz reaction tube and a heater, the quartz reaction tube is arranged in the reaction furnace, the quartz reaction tube is filled with composite catalytic particles, the outer side of the quartz reaction tube is coated with a heating sleeve, and the heater is embedded in the upper part in the reaction furnace; the outlet end of the quartz reaction tube is respectively connected with a detection system and a collection condensation system through a heat-preservation vaporization system, the output end of the collection condensation system is connected with the detection system, and the output end of the detection system is connected with a tail gas absorption system. The problems of lack of SO3 standard gas and poor stability at present can be effectively solved, a reliable standard substance is provided for accurate monitoring of sulfur trioxide gas, and the performance and the quantity value traceability of detection equipment are improved.
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