Measuring device for coal spontaneous combustion characteristic parameters based on load pressurization method

Abstract

The invention relates to a coal spontaneous combustion characteristic parameter measuring device based on a load pressurizing mode.The problems existing in coal spontaneous combustion characteristic parameter measurement under load pressurizing are effectively solved.A reaction still insulating layer is arranged outside a heating piece outside a reaction still body, the heating piece is connected with a second temperature programming temperature controller, a temperature sensor, a gas inflow pipeline and a gas outflow pipeline are arranged on an upper reaction still cover, and the temperature sensor is connected with a temperature acquisition module.A gas preheater is connected with the gas inflow pipeline, a high-pressure gas bottle and a first temperature programming temperature controller, the gas outflow pipeline is connected with a gas chromatographic analyzer, a piston is arranged in an oil cylinder at the bottom of the lower bottom of a reaction still, a coal sample tank is arranged on the piston, and the upper portion and the lower portion of the oil cylinder are communicated with a pressurizing system.The automation degree is high, and the measuring result is reliable.

Description

technical field [0001] The invention relates to a coal spontaneous combustion characteristic parameter measuring device based on a load pressurization method. Background technique [0002] Energy is the economic foundation of a country. Although emerging energy has been developing rapidly in recent years. However, fossil energy still occupies a huge proportion in my country's energy structure, especially coal. According to the data of the National Bureau of Statistics, from the 1990s to the present, coal has maintained more than 70% of my country's energy structure. And coal will still be the main component of my country's energy in the next few decades. But mine fires, especially mine fires caused by coal spontaneous combustion seriously affect the normal mining of coal resources in our country. [0003] The spontaneous combustion of coal is mainly due to the oxidation and heat storage of coal in contact with oxygen, which in turn causes the spontaneous combustion of co...

AI Technical Summary

Problems solved by technology

There are the following characteristics and problems in the existing commonly used coal spontaneous combustion characteristics measurement methods: 1) the retrieved coal sample is crushed and put into the coal sample tank, and the coal sample is oxidized and heated in a constant flow atmosphere, not under a certain pressure difference Oxidation and heating, did not take into account that the porosity of the broken coal sample will change during the oxidation and heating process, which will affect the gas flow; The change of the porosity of the coal sample in the loaded state and the change of the porosity of the coal sample during the heating process

3) When the coal sample is oxidized and heated at a constant flow rate, it is impossible to judge the gas consumption of the coal sample during the heating process

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