Oil bath type coal temperature programming experiment device based on dynamic oxygen environment

Abstract

The invention discloses an oil bath type coal temperature programming experiment device based on a dynamic oxygen environment. The experiment device comprises a dynamic gas distribution system, a coaltemperature programming system, an automatic quantitative gas sample collecting system and a gas sample data analyzing system, wherein the dynamic gas distribution system is provided with a high-pressure oxygen cylinder and a high-pressure nitrogen cylinder; the coal temperature programming system comprises a preheating copper tube, silicone oil, a stirrer, a heating ring, a coal sample tank, a thermocouple, a multi-point temperature recorder and a temperature controller; the automatic quantitative gas sample collecting system is provided with a purifying pipe, an automatic quantitative sampler and a time delayer; the gas sample data analyzing system is provided with a G2800T gas chromatograph, a G3800F gas chromatograph, a methane converter and a data processing computer. The oil bath type coal temperature programming experiment device has a reasonable design and convenience in operation, can provide temperature programming environments with different oxygen concentrations for coal samples and can make all parts of the coal samples be evenly heated; thus, experiment precision and data result accuracy are improved, an operation process is simplified, and experiment time is shortened.

Description

technical field [0001] The invention relates to the technical field of measuring coal spontaneous combustion characteristic parameters, in particular to an oil-bath type coal temperature-programmed experimental device based on a dynamic oxygen environment. Background technique [0002] At present, the low-temperature oxidation experiment of coal is widely used in the field of experimental research on coal spontaneous combustion characteristics. The research on coal spontaneous combustion characteristics and index gas generation law is carried out in an environment with an initial oxygen volume fraction of 21%. The experimental system mainly includes procedures There are two types of heating system and adiabatic oxidation system, most of which use air to heat the coal sample, but due to the poor heat conduction effect of the air, the large temperature difference between various coal samples and the unbalanced heating result in inaccurate calculation of oxygen consumption. The...

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Problems solved by technology

[0004] Aiming at the defects of the existing coal temperature programming experiment device, the present invention provides an oil bath type coal temperature programming experiment device based on a dynamic oxygen environment, which is reasonable in design and easy to operate, and can provide coal samples with different oxygen concentrations through a dynamic gas distribution system. Heating the coal sample in the oil bath can make each part of the coal sample heated evenly, improve the accuracy of the experiment and the accuracy of the data results, and the automatic quantitative gas sample collection system can realize the gas product in the process of coal oxidation and heating. Automatic sampling can accurately control the sampling time and gas sample volume, and realize the automatic intelligent testing and analysis of gas samples, which makes up for the defects of artificial uneven sampling and low measurement accuracy, simplifies the operation process, and shortens the experiment time

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