Device and method for measuring coal spontaneous combustion tendency

Abstract

The invention provides a device and method for measuring coal spontaneous combustion tendency. The device comprises an outer main box body, a coal box, a coal sample tank and a signal receiving analyzing system; an oil inlet, an oil discharging port and valves are arranged on the side wall of the outer main box body, a main box body cover plate covers the top of the outer main box body, the coal box is arranged in the outer main box body, and a coal box cover plate covers the top of the coal box; a gas inlet pipe is arranged on the side wall of the coal box, penetrates through the side wall ofthe outer main box body, and is connected with an air compressor, a gas flow controller is further arranged on the gas inlet pipe, the coal sample tank is arranged in the coal box, and the bottom ofthe coal sample tank is in a net shape; an exhaust pipe, an electromagnetic radiation tester and a thermocouple are arranged on the coal box cover plate, one end of the thermocouple extends in the coal sample tank, the other end of the thermocouple is connected with a temperature controller, an electric stove wire is arranged on the portion, located below the coal box, in the outer main box body and is connected with the temperature controller, the signal receiving analyzing system comprises a host, and the host is connected with the electromagnetic radiation tester.

Description

technical field [0001] The invention relates to the technical field of coal spontaneous combustion prevention and control, in particular to a coal spontaneous combustion tendency measuring device and a coal spontaneous combustion tendency measuring method. Background technique [0002] The hazard of coal spontaneous combustion can not only cause serious social harm and environmental pollution, but also cause a huge loss of coal resources. In the process of coal mining, most mine fires are caused by the spontaneous combustion of coal, and serious accidents such as gas and coal dust explosions may be induced. Therefore, it is of great significance to study the determination method of coal spontaneous combustion tendency for coal mine fire prevention and extinguishing work. [0003] At present, foreign methods for the determination of coal spontaneous combustion tendency mainly include adiabatic oxidation method (USA, Australia), high temperature activation energy method (Pola...

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Problems solved by technology

Among them, the test conditions of the adiabatic oxidation method adopted abroad are harsh. The high-temperature activation energy method and the intersection temperature method reflect the oxidative spontaneous combustion characteristics of coal at relatively high temperatures (usually greater than 140 ° C), but fail to reflect the oxidative spontaneous combustion in the low-temperature oxidation stage. However, the methods used in China have the following deficiencies: the chromatographic oxygen absorption method is used to measure the characteristics of coal physical adsorption of oxygen, and the adsorption characteristics of coal are related to its surface properties and pore structure, which is difficult to fully reflect the autothermal oxidation characteristics of coal; However, not all the oxygen physically adsorbed by coal participates in the temperature-rising oxidation process, which depends on the structure of the coal; the amount of oxygen absorbed and the cross-point temperature in the process of temperature-programmed oxidation, through passive heating of the coal sample, it is difficult to completely reflect the true nature of the coal. propensity to spontaneous combustion

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