Blast-furnace hot blast stove coal gas abnormal component diagnosis method

A technology of gas composition and diagnosis method, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of long-term rest, combustion or explosion of hot blast stoves, and achieve safe operation, short diagnosis time, and production impact. small effect

Inactive Publication Date: 2019-12-03
SGIS SONGSHAN CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

The high content of CO gas in the gas may cause combustion or explosion accidents, resulting in unplanned long-term shutdown accidents of blast furnaces and hot blast stoves
There is no effective detection technology for abnormal hot blast stove gas content in the existing blast furnace hot blast stove technology

Method used

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  • Blast-furnace hot blast stove coal gas abnormal component diagnosis method

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Embodiment Construction

[0013] Below in conjunction with embodiment the present invention is further described.

[0014] A method for diagnosing abnormal components of blast furnace hot blast stove gas, the diagnostic steps are:

[0015] In the first step, when the test result of the hot stove gas online analyzer 3 continues to show CO > 2000ppm abnormality, the instrument professional will first confirm the test equipment, and conduct manual sampling to analyze the gas composition, and check the test results of the online analyzer;

[0016] The second step is to conduct experiments to confirm the possible existence of gas preheater failure punctures or weld bursts in the waste heat recovery system, which may cause gas leakage and affect the abnormal composition of the gas. Fully open the gas preheater 4 bypass valve 2, and then turn off the gas The inlet and outlet valves (5, 6) before and after the preheater are tested for gas without passing through the preheater; if the test results of the gas on...

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Abstract

The invention relates to a blast-furnace hot blast stove coal gas abnormal component diagnosis method which comprises the diagnostic steps of (1) confirming testing equipment through an instrument professionally, manually sampling and analyzing coal gas components, and checking an online analyzer detection result; (2) carrying out experiment validation on the occurrence of the phenomenon that piercing or welding seam bursting caused by failure of a coal gas preheater probably existed in a waste heat recovery system causes coal gas leakage and influences coal gas component abnormity; (3) usinga professional coal gas component detection device, utilizing a pressure measuring hole in a hot blast stove flue pipe for extracting online coal gas, and detecting single-furnace coal gas components;(4) carrying out an experiment on manually adjusting the combustion air-fuel ratio of a hot blast stove so as to improve a residual oxygen control value; and (5) analyzing and confirming hot blast stove body equipment failures. The blast-furnace hot blast stove coal gas abnormal component diagnosis method is short in diagnosis time, high in accuracy and high in diagnosis efficiency, and achievesthe aim on promoting the safe operation state of a hot blast stove system.

Description

technical field [0001] The invention belongs to the technical field of blast furnace hot blast stove technology, and relates to a method for diagnosing abnormal components of blast furnace hot blast stove gas. Background technique [0002] In the normal state of the blast furnace hot blast stove system, the CO gas in the hot blast stove gas should be zero in the on-line analysis and detection before it is discharged into the chimney. However, in actual production, the detection results of CO gas in the gas sometimes exceed 2000ppm continuously, and even reach more than 10000ppm. From the analysis of the equipment structure and the principle of air and gas combustion, the main reasons for the high CO gas content in the hot blast stove system are: the failure of the hot blast stove body includes the burner failure (including the unscientific structure of the burner and the leakage of the gas channel), the internal combustion type There are gaps in the partition wall of the ho...

Claims

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Application Information

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IPC IPC(8): G01N33/00
CPCG01N33/0062
Inventor 杨国新李鲜明邱义华柏徳春艾中路江滔周凌云
Owner SGIS SONGSHAN CO LTD
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