Thermal insulation testing process and apparatus for simulating coal spontaneous combustion procedure

Abstract

It is an adiabatic test method and its apparatus for stimulating the coal autoignition process, which is to locate an adiabatic coal sample jar served as coal low temperature oxidation reaction and to let the gas in the jar firstly go through the copper gas guide pipe in the gas bath temperature control box for preheating and the environment temperature in the box of the reaction always traces the temperature changes in the coal sample jar. It adopts preheat gas path apparatus, gas bath temperature control box, adiabatic coal jar in the temperature control box, temperature control system, which makes the heat generated during the reaction remain in the coal sample to stimulate the coal autoignition process.

Description

1. Technical field [0001] The invention discloses an adiabatic test method and device for simulating the spontaneous combustion process of coal, especially suitable for simulating the spontaneous combustion process of coal, studying the characteristics of spontaneous combustion of coal, and testing and classifying the tendency of spontaneous combustion of coal. 2. Background technology [0002] Coal spontaneous combustion is one of the major disasters in coal mines and coal storage and transportation. The research on coal spontaneous combustion process and its characteristics, especially the test and classification of coal spontaneous combustion tendency is an important basic work for the prevention and control of coal spontaneous combustion. At present, my country's coal industry mainly uses the chromatographic dynamic oxygen absorption method to determine the spontaneous combustion tendency of coal in terms of testing methods for coal spontaneous combustion tendency. This ...

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Problems solved by technology

At present, my country's coal industry mainly uses the chromatographic dynamic oxygen absorption method to determine the spontaneous combustion tendency of coal in terms of testing methods for coal spontaneous combustion tendency. This method is based on the physical adsorption capacity of coal to oxygen at 30 ° C Size, that is, to determine the spontaneous combustion tendency of coal according to the amount of oxygen absorbed. This is an indirect measurement method that cannot reflect the chemical characteristics and process characteristics of coal spontaneous combustion

Because the heat released by coal in the low-temperature oxidation process is very small, it is difficult to carry out direct experiments on the temperature rise characteristics of coal spontaneous combustion oxidation in the laboratory, especially under the experimental conditions of small coal samples

In order to measure the spontaneous combustion characteristics of coal, an experimental device with a large coal sample is generally used. The device is composed of a large container with a water-proof layer on the inner wall. The container is provided with an air inlet and outlet, and multiple temperature sensors are arranged in a certain way inside the container. , in order to test the spontaneous combustion process and characteristics of coal. The amount of such experimental coal samples often requires hundreds of kilograms, or even tens of tons, and the test period is long. It takes dozens of days to several months to test a coal sample. Its testing workload is heavy, the cost is high, it is difficult to carry out repeated testing, and it is difficult to popularize and apply

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