System and method for measuring low-temperature spontaneous combustion characteristics of coal in closed environment

By designing a coal low-temperature self-ignition characteristic measurement system for closed environments, the problem that the prior art is difficult to measure coal's self-ignition characteristics under low temperature conditions is solved, and effective determination of coal low-temperature self-ignition characteristics in closed environments is realized.

CN119688868APending Publication Date: 2025-03-25HENAN POLYTECHNIC UNIV
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Patent Information

Application Number
CN202411818345.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The prior art is difficult to effectively measure the spontaneous combustion characteristics of coal under low temperature conditions, especially in a closed environment, which makes it difficult to detect gas production concentration and oxygen consumption.

Method used

A coal low-temperature self-ignition characteristic determination system for closed environments is designed, including program temperature-raising furnaces, coal sample tanks, circulation systems, sampling units and temperature collection systems. The circulation of gas is realized through the circulation system, and the three-way valve controls the on-off of the circulation route, and the sampling unit is used for gas sample analysis.

Benefits of technology

It effectively solves the problem that the gas produced by slow oxidation of coal from low temperature and slow oxidation is carried out by a fixed flow atmosphere, and realizes the determination of low temperature spontaneous combustion characteristics of coal in a closed environment, and can accurately detect gas production concentration and oxygen consumption.

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Abstract

The invention discloses a system and a method for measuring low-temperature spontaneous combustion characteristics of coal in a closed environment, and the system comprises a temperature programming furnace which is internally provided with a placing table at the bottom; the coal sample tank is fixed on the placing table, the coal sample tank is filled with a coal sample, and a gas outlet and a gas inlet are formed in the side wall of the coal sample tank; the two ends of the circulating system communicate with the air inlet and the air outlet correspondingly, and a three-way valve is installed on the circulating system; the sampling unit is communicated with the three-way valve; the temperature acquisition systems are arranged on the inner wall and the outer wall of the coal sample tank and are respectively used for monitoring the temperature of the coal sample in the coal sample tank and the wall temperature of the coal sample tank; and the circulating system, the temperature programming furnace, the sampling unit and the temperature acquisition system are electrically connected with the control terminal. The problem that gas generated by low-temperature slow oxidation of coal is carried out by constant-flow atmosphere is effectively solved, and low-temperature spontaneous combustion characteristic measurement of coal in a closed environment is realized.
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