Tank type coal spontaneous combustion gas testing device and method

Abstract

The invention discloses a tank type coal spontaneous-combustion gas testing device which comprises a heat-preservation and heating box and a coal sample tank, as well as an air conveying system, a gas filtering and sampling system and a temperature control system, wherein a heating unit and a soaking fan are arranged in the heat-preservation and heating box; copper nets for supporting coal samples are arranged at the bottom and the upper part in the coal sample tank; a gas inlet pipe is arranged at the bottom of the coal sample tank; a gas outlet pipe is arranged at the top of the coal sample tank; the air conveying system comprises an air conveying pipe and a flow meter; the gas filtering and sampling system comprises a gas sampling pipe and a gas filtering and sampling box; a gas filtering and sampling valve is arranged on the gas sampling pipe; the temperature control system comprises a temperature control meter, a first temperature sensor and a second temperature sensor. The invention also discloses a tank type coal spontaneous-combustion gas testing method. The tank type coal spontaneous-combustion gas testing device and method provided by the invention are novel and reasonable in design, convenient to realize, low in cost, convenient to use and operate, able to truly reflect reaction conditions of coal spontaneous-combustion under high temperature condition, high in practicality, good in use effect, and convenient for promotion and application.

Description

technical field [0001] The invention belongs to the technical field of coal spontaneous combustion gas testing, and in particular relates to a tank type coal spontaneous combustion gas testing device and method. Background technique [0002] Coalfield fire has been a worldwide problem for a long time. The formation and evolution process of coalfield fire area is complex, with long burning time, wide range, hidden high-temperature fire source, and difficult control. A total of 56 coalfield fire areas have been identified in my country, which are distributed in 7 provinces and autonomous regions including Xinjiang, Gansu, Qinghai, Ningxia, Shaanxi, Shanxi, and Inner Mongolia, with a total burning area of ​​720 square kilometers. The area with the most severe coalfield spontaneous combustion disaster in the world. Among the existing experimental devices for testing the characteristic parameters of coal spontaneous combustion, the characteristic parameters of the low temperature...

AI Technical Summary

Problems solved by technology

Among the existing experimental devices for testing the characteristic parameters of coal spontaneous combustion, the characteristic parameters of the low temperature stage of coal spontaneous combustion account for the vast majority, which can only provide a reference for the prediction of coal spontaneous combustion and prevent the formation of coalfield fire areas. However, for The coalfield fire areas that have been developed cannot provide valuable theoretical support for characteristic parameters and cannot effectively guide the control of coalfield fires.

In addition, for the existing equipment for testing the characteristic parameters of the high-temperature stage of coal spontaneous combustion, with the continuous increase of the experimental temperature, mixed volatiles such as impurity oil gas, water vapor, etc. will often appear in the pipeline of the equipment to block, especially in the gas extraction process. location, which will hinder the smooth progress of experimental research and affect the final experimental results

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