Method for testing heat production characteristics of coal spontaneous combustion simple oxidation process
A technology of oxidation process and test method, which is applied in the field of coal spontaneous combustion, can solve the problems of long test time, low test success rate, and inability to reflect the nature of coal low-temperature oxidation, etc., and achieve the effect of short time consumption and high success rate
Active Publication Date: 2020-04-17
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method for testing the heat production characteristics of the simple oxidation process of coal spontaneous combustion, which can solve the problems of long test time, low experimental success rate and inability to reflect the nature of low-temperature oxidation of coal in the heat test method in the prior art. technical problem
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Embodiment 1
[0045] Step 1, put the experimental coal sample 6 prepared according to the regulations into the coal sample tank 4, use the furnace temperature sensor 3 to monitor the furnace temperature, use the coal temperature sensor 8 to monitor the temperature of the coal sample, and set a constant temperature through the heater 2 heat flow size;
[0046] Step 2: Set the concentration of oxygen in the oxygen-containing atmosphere according to the needs of the experiment, and then pass the prepared gas into the coal sample tank 4 through the gas inlet 7, and the coal and oxygen in the coal sample tank 4 react to release heat. The gas is discharged through the gas outlet 5. Under this atmospheric condition, the heat source for the temperature rise in the coal sample tank 4 is mainly composed of three parts, which are the constant heat generated by the heater 2, the heat generated by the reaction of coal and oxygen in the coal sample tank 4 and the coal sample tank 4. The heat generated b...
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The invention discloses a method for testing heat production characteristics of a coal spontaneous combustion simple oxidation process, and relates to the technical field of coal spontaneous combustion. The testing method mainly comprises the following steps: firstly, applying a constant heat flow to an experimental coal sample, then, carrying out an experiment on the coal sample under an oxygen-containing atmosphere to obtain a temperature rise curve under the oxygen-containing atmosphere condition, and obtaining a temperature rise rate under the oxygen-containing atmosphere condition; performing the same operation under the inert atmosphere to obtain a temperature rise curve and a temperature rise rate under the inert atmosphere condition; then, the temperature rise rate of the pure oxidation process is obtained through the temperature rise rate difference value of the two atmospheres; multiplying the pure oxidation heating rate obtained under any temperature condition by the specific heat capacity of the coal to obtain the heat production rate of the pure oxidation process; and finally, on the basis of the heat production rate, obtaining heat production quantity and other thermal characteristic parameters through calculation. According to the testing method, the coal and oxygen compounding process can be known more accurately, and a theoretical basis is provided for furtherunderstanding the coal spontaneous combustion process and calculation of the ignition period.
Description
technical field [0001] The invention relates to the technical field of coal spontaneous combustion, in particular to a method for testing the heat production characteristics of the simple oxidation process of coal spontaneous combustion, which is mainly used for studying the heat change characteristics of the coal spontaneous combustion process. Background technique [0002] Coal is one of the main energy sources in the world, but during the mining, storage and transportation of coal, it will be exposed to the air, which will react with oxygen and release heat. If the heat is not removed in time, it will cause The accumulation of heat causes the coal to spontaneously ignite. Therefore, the heat generated by the oxidation reaction between coal and oxygen is the root cause of coal spontaneous combustion. Only by understanding the heat production characteristics of coal spontaneous combustion process in detail can we better prevent coal spontaneous combustion. The parameters r...
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Login to View More IPC IPC(8): G01N25/22
CPCG01N25/22
Inventor 李金亮陆伟徐帅孔彪贺正龙亓冠圣
Owner SHANDONG UNIV OF SCI & TECH