Device for investigating coal self-combustion tendentiousness based on low temp oxidation oxygen consumption

Abstract

A coal spontaneous combustion tendency identification device based on low-temperature oxidation oxygen consumption, which consists of a constant temperature control box (1), an oxygen concentration tester (2), an oxygen consumption test container (3) and a gas outlet pipe (5). The oxygen test container (3) is a quartz glass spherical cavity with a flat bottom and a long bottleneck, the spherical cavity of the oxygen consumption test container (3) is located in the constant temperature control box (1), and the upper part of the long bottleneck extends out of the constant temperature control box (1) and sealed by the piston type sealing plug (4), one end of the gas outlet pipe (5) passes through the piston type sealing plug (4) and stretches into the oxygen consumption test container (3), and the other end is connected with the oxygen concentration tester (2) are connected, and the air valve switch (6) is connected in series on the gas outlet pipe (5). The invention makes the coal spontaneous combustion tendency identification method more scientific and reasonable, and the identification process truly reflects the low-temperature oxidation characteristics of the coal, so the identification result is accurate and reliable.

Description

Technical field [0001] The invention belongs to the technical field of identifying and classifying coal spontaneous combustion tendency, and specifically relates to a coal spontaneous combustion tendency identification device based on oxygen consumption. Background technique [0002] Spontaneous combustion of coal is one of the major disasters in coal mines and coal storage and transportation. The spontaneous combustion tendency of coal, that is, the degree of difficulty in spontaneous combustion of coal, is a manifestation of coal's low-temperature oxidability and is one of the inherent properties of coal. Different coal seams and coals in different mines have different coal spontaneous combustion tendencies. The coal spontaneous combustion tendency is the basic basis for the classification of coal mine fire prevention and extinguishing grades. All fire prevention technologies and measures are based on the identification of coal spontaneous combustion tendency. Therefore, scient...

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Problems solved by technology

my country's current coal spontaneous combustion tendency identification device and its corresponding methods have the following shortcomings: 1) The coal spontaneous combustion process not only has physical adsorption of oxygen, but also includes the more important chemical adsorption and chemical reaction process of coal and oxygen; 2) my country's current coal spontaneous combustion tendency is an indirect test method, and there is no evidence that the adsorption capacity of coal at a certain temperature point for oxygen is necessarily related to the spontaneous combustion tendency of coal

The ability of coal to physically absorb oxygen is related to coal surface properties and pore structure, which is a manifestation of coal physical characteristics; 3) The current identification of coal spontaneous combustion tendency in my country has different classification standards for different coal types, that is, the identification results and their classification are different from those of coal. coal type, which contradicts the classification principle of the law

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