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

An identification method and oxygen consumption technology, applied in chemical method analysis, measuring devices, fuel oil testing, etc., can solve problems such as different classification standards, and achieve the effects of scientific identification, unified classification methods, and a solid theoretical foundation

Active Publication Date: 2007-07-18
CHINA COAL TECH ENG GRP CHONGQING RES INST
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Problems solved by technology

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

Method used

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

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] As shown in Figure 1 and Figure 2, in order to identify the spontaneous combustion tendency of coal, follow the steps below:

[0016] (1) Remove the surface layer of the newly collected coal block and crush it under normal temperature and pressure atmospheric environment, and sieve out the coal particles with a particle size of 0.1-0.15mm as the test coal sample for use.

[0017] (2) Put 40-50 g of coal samples into the test container 3 with a long-necked funnel. Be careful not to attach the coal samples to the inside of the bottleneck, and then put the piston-type sealing plug 4 connected with the gas outlet pipe 5 into the test container 3 with the help of a small glass stick. Slowly stuff it into the bottleneck of the test container 3, make the bottom edge of the piston type sealing plug 4 horizontally aligned with the 2000m...

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Abstract

The invention relates to coal self-combustion orientation identifying method based on low temperature oxidizing oxygen-consumption. It includes the following steps: putting the coal sample with 0.1-0.15mm granularity into testing container sealed with certain normal temperature and pressure air; putting the testing container into thermostatic control at 100 degree centigrade for one hour; using oxygen density tester to measure the oxygen density in the testing container; converting out low temperature oxidizing oxygen-consumption per dry coal according to the oxygen density changed value to confirm coal sample self combustion orientation grade. The invention replaces physical adsorption oxygen method by the identifying method used coal low temperature oxidizing oxygen-consumption as index which has solid theoretical basis, simple and reliable actualized method and test procedure, uniform classifying method.

Description

technical field [0001] The invention relates to a coal spontaneous combustion tendency identification method based on oxygen consumption, which is suitable for identifying and classifying the coal spontaneous combustion tendency. Background technique [0002] Coal spontaneous combustion is one of the major disasters in coal mines and coal storage and transportation. The spontaneous combustion tendency of coal, that is, the difficulty of spontaneous combustion of coal, is the embodiment of low-temperature oxidation of coal, and is one of the inherent properties of coal. Coals from different coal seams and mines have different coal spontaneous combustion tendencies. The tendency of coal spontaneous combustion is the basic basis for the classification of fire prevention and extinguishing grades in coal mines. All fire prevention technologies and measures are based on the identification of coal spontaneous combustion tendency. Therefore, it is very important to scientifically ...

Claims

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Application Information

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IPC IPC(8): G01N31/00G01N33/22G01N1/28
Inventor 陆伟
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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