Coal spontaneous combustion program temperature control system and method utilizing microwave heating

A technology of microwave heating and coal spontaneous combustion, which is applied in the field of coal spontaneous combustion characteristics research, can solve the problems of uneven temperature distribution of coal samples, difficulty in controlling the heating rate, and long time required to achieve controllable heating rate and short time consumption , the effect of a reasonable structure

Pending Publication Date: 2021-05-28
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the above method to heat the coal sample, it takes a long time to reach the set temperature, and the temperature distribution of the coal sample in the coal sample tank is generally uneven, and the heating rate is difficult to control.

Method used

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  • Coal spontaneous combustion program temperature control system and method utilizing microwave heating
  • Coal spontaneous combustion program temperature control system and method utilizing microwave heating
  • Coal spontaneous combustion program temperature control system and method utilizing microwave heating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 A Coal Spontaneous Combustion Programmed Temperature Control System Utilizing Microwave Heating

[0043] Such as Figure 1 to Figure 4 As shown, this embodiment includes a heating mechanism 1, a coal sample carrying mechanism 2, an electric control mechanism, and a gas collection and analysis mechanism that cooperate with each other. In this embodiment, the microwave heating method is adopted to realize the rapid temperature rise of the coal sample, while ensuring the heating uniformity of the coal sample, it also realizes the adjustable and controllable heating rate of the coal sample.

[0044] 1. Heating mechanism 1

[0045] The heating mechanism 1 is the core component of this embodiment, and is used to emit microwaves to heat the coal sample. Such as figure 2 As shown, the heating mechanism 1 includes a microwave generator, a microwave energy applicator and a microwave transmitter. Wherein, the microwave generator includes a magnetron 4 and a transforme...

Embodiment 2

[0056] Example 2 A program temperature control method for coal spontaneous combustion using microwave heating

[0057] This embodiment utilizes the coal spontaneous combustion program temperature control system as described in Embodiment 1, including the following steps carried out in sequence:

[0058] Step S1, coal sample filling

[0059] Open the door of the microwave energy applicator (that is, the resonant cavity 7), take out the coal sample tank 9, fill the coal sample broken to a certain particle size evenly into the coal sample tank 9, and then arrange a layer of asbestos mesh above the coal sample Finally, cover the end cover 11, insert the temperature sensor (ie thermocouple), and then put the coal sample tank 9 into the microwave energy applicator. At the same time, ensure that each component in the electric control mechanism and the gas chromatograph 14 can communicate with the computer in real time.

[0060] S2, programmed temperature rise

[0061] Pass the gas...

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Abstract

The invention discloses a coal spontaneous combustion programmed temperature control system and method utilizing microwave heating, and the related coal spontaneous combustion programmed temperature control system comprises a heating mechanism, a coal sample bearing mechanism, an electric control mechanism and a gas collection and analysis mechanism; the heating mechanism is used for heating the coal sample in the coal sample bearing mechanism by utilizing a microwave generator; the electric control mechanism is used for controlling the heating power of the coal sample and the gas flow leading to the coal sample; and the gas collection and analysis mechanism is used for collecting a gas sample generated in the analysis process. The invention further relates to a coal spontaneous combustion program temperature control method utilizing microwave heating, the coal spontaneous combustion program temperature control method comprises the stages of coal sample filling, program heating, temperature control mode and the like; the ratio of the actual microwave heating effect to the industrial energy consumption is comprehensively considered, the frequency value of microwaves is set to be 2.45 GHz in the program heating stage, and the heating power value is set to be 1.2-1.6 kw in the program heating stage. The system and method are suitable for being used in coal spontaneous combustion characteristic research, it can be guaranteed that the coal sample is rapidly and evenly heated, the heating rate is controllable, and different experiment requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of coal spontaneous combustion characteristics research, in particular to a coal spontaneous combustion program temperature control system and method using microwave heating. Background technique [0002] Coal spontaneous combustion is one of the hazards that affect mine safety. It not only releases toxic and harmful gases, causing air pollution, but also causes gas explosions, endangering the safety and health of mine workers, damaging coal resources and production equipment, and causing huge economic losses. Coal spontaneous combustion is a self-accelerating coal-oxygen complex exothermic process. Oxygen molecules first form physical and chemical adsorption heat on the coal surface, which leads to an increase in the temperature of the coal body, and then promotes the oxidative decomposition reaction between oxygen molecules and the active functional groups on the surface of coal molecules, releasing a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/22
CPCG05D23/22
Inventor 肖旸石群高鲁晗王亚超尹岚李青蔚芦星王凯
Owner XIAN UNIV OF SCI & TECH
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