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Method, system and device for identifying combustion state of underground coal gasification furnace

A technology of underground gasification and combustion state, which is applied in coal gasification, underground mining, construction, etc., can solve problems such as inconsistency, and achieve the effect of accurate combustion state

Active Publication Date: 2010-02-17
ENN SCI & TECH DEV
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Problems solved by technology

[0004] However, the current traditional monitoring method is to measure the parameters that can indirectly reflect the combustion state of the underground gasifier, such as the temperature, pressure, flow rate, and gas composition of the produced syngas, and use these data to monitor the combustion conditions in the underground gasifier. However, this measurement method only indirectly analyzes and speculates the combustion state in the underground gasifier, so the speculative results may not be consistent with the actual situation

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  • Method, system and device for identifying combustion state of underground coal gasification furnace

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Embodiment Construction

[0027] The embodiment of the present invention proposes a method for monitoring the combustion state of an underground coal gasifier by using activated carbon radon measurement technology to understand the geological information of the deep underground by observing the radon near the surface.

[0028] In fact, the radon migration pattern is different under different thermal gradients. For example, at room temperature, the ratio of radon release to generation is only 0.02% in one day, but as the temperature continues to rise, the release of radon is gradually increasing, and the higher the temperature, the more radon released from rocks. more. A.H. Sultanyev et al. did experiments on the relationship between the amount of radon precipitation and temperature in a mixture of gypsum, calcium carbonate, calcium carbonate and titanium dioxide. The experiment also proved that the precipitation of radon from rocks (minerals) also increases with the increase of temperature. Large, the...

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Abstract

The invention relates to the field of underground coal gasification, in particular to a technique for monitoring the combustion state of an underground coal gasification furnace. The invention provides system, device and method for identifying the combustion state of an underground coal gasification furnace. The method comprises the following steps: arranging detection points in the ground surface exploration range of the underground coal gasification furnace; collecting radon gas at the detection points and carrying out temperature measurement at a certain number of determined underground detection points; determining an underground temperature field according to the collected radon gas and the measured temperature so as to identify the combustion state of the underground coal gasification furnace. Because the radon gas is collected at the ground surface of the underground coal gasification furnace, the underground temperature field is identified according to the radon gas collected at the detection points and the underground temperature of at least one detection point, and the underground temperature field directly reflects the combustion state of the underground coal gasification furnace, therefore, the invention is more accurate compared with the prior art which conjectures the combustion state of the underground coal gasification furnace by parameters of syngas.

Description

technical field [0001] The invention relates to the field of underground coal gasification, in particular to a technique for monitoring the combustion state of an underground coal gasification furnace. Background technique [0002] Underground coal gasification is an energy collection method that directly burns coal stored in the ground in a controlled manner, produces gas and then outputs it to the ground. Compared with the traditional coal mining method, underground gasification coal mining can maximize the utilization of coal resources, and is safe, environmentally friendly, efficient, and has very significant economic benefits; especially it is also suitable for mines that cannot be mined or mined by conventional methods Uneconomical coal seams, as well as secondary or multiple recovery of coal mines, are therefore widely valued. The final breakthrough in the transition from experimental to commercial mining is currently underway. [0003] The main bottleneck encounter...

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Application Information

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IPC IPC(8): E21B43/295
Inventor 陈峰梁桂玲李俊李庆堂刘江涛
Owner ENN SCI & TECH DEV
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