Device and method for detecting sulfur dioxide before and after fine desulfurization of blast furnace gas

By using a switching combustion method involving blast furnace gas combustion devices and SO2 and O2 detection devices, continuous and real-time detection of the blast furnace gas desulfurization process was achieved. This solved the problem that existing equipment could not accurately detect sulfur dioxide, ensuring the stability of the desulfurization effect and the reliability of process adjustments.

CN122084819APending Publication Date: 2026-05-26BEIJING BEIKE ENVIRONMENTAL ENG CO LTD
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Patent Information

Application Number
CN202610243459.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-02
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing blast furnace gas desulfurization detection equipment cannot detect sulfur dioxide content in real time and comprehensively, failing to meet the real-time control requirements of the desulfurization process. In particular, it lacks sufficient identification of organic sulfur components, resulting in inaccurate detection results and an inability to adjust process parameters in a timely manner, making it difficult to ensure the stability of desulfurization effect.

Method used

By employing a blast furnace gas combustion device and SO2 and O2 detection devices, the blast furnace gas before and after fine desulfurization is switched for combustion, and the concentrations of sulfur dioxide and oxygen in the combustion gas are detected in real time. Combined with valve switching, continuous monitoring is achieved, simulating the sulfur dioxide emission concentration under different oxygen contents, and providing a reliable basis for process adjustment.

Benefits of technology

It enables continuous and real-time monitoring of the blast furnace gas desulfurization process, accurately assesses the desulfurization effect, ensures that end-of-pipe emissions meet standards, provides a reliable basis for process adjustment, and solves the functional limitations and detection lag issues of existing equipment.

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Abstract

The invention relates to a sulfur dioxide detection device and detection method suitable for blast furnace gas before and after fine desulfurization, and the detection device comprises an undesulfurized gas control part, a desulfurized gas control part, a blast furnace gas combustion device and an SO2 and O2 detection device, the detection method comprises the steps of preheating a combustion device, discharging blast furnace gas and air before fine desulfurization for ignition combustion, detecting combustion gas of the gas before desulfurization, switching combustion of the desulfurized gas, detecting combustion gas of the desulfurized gas, performing result analysis and comparison and the like. According to the invention, through specific matching setting of the device and specific setting of each step, continuous switching type combustion is realized, and the sulfur dioxide content of combustion gas is respectively measured, so that the desulfurization result of the fine desulfurization device can be monitored in real time, and different combustion conditions of a user side can be predicted in real time; and the monitoring effect on the fine desulfurization device is greatly improved.
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