Simple in-situ combustion energy-taking experimental device

Abstract

The utility model provides a simple in-situ combustion energy taking experiment device which comprises a water bath box and a combustion device body, the two ends of the combustion device body are connected with an oxygen inlet pipeline and a tail gas outlet pipeline respectively, a temperature detection device is arranged on the combustion device body, and a quality monitoring spring is arranged below the combustion device body. Pressure monitoring devices are arranged in the oxygen inlet pipeline and the tail gas outlet pipeline; an experimental measuring instrument is simple and low in cost; the combustion device body is arranged in the water bath box, the heat change in the combustion device body and the water bath box during coal combustion is measured, the gas tightness is good, a gas channel is only exhausted by a tail gas pipe, the hidden danger of gas leakage is reduced, and the deformation scale difference of a quality detection spring before and after an experiment is recorded, so that the change data of the coal quality in the combustion device along with time is calculated. The accuracy of related data of the generated gas is ensured; the structure is simple and easy to disassemble; the experiment process and ending treatment work do not need tedious procedures, and the experiment efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal underground in situ combustion and heat exchange related technical field, especially in situ combustion energy acquisition experimental device of simple. BACKGROUND

[0002] Coal underground in situ combustion and heat exchange technology is a technical idea proposed in recent years, and the research degree is insufficient, and there is no test device for coal underground in situ combustion and heat exchange technology experiment at present.

[0003] And the coal underground gasification experiment system has the following several points for coal underground in situ combustion and heat exchange technology experiment:

[0004] The principle process is different, and the heat exchange experiment cannot be carried out. The late reaction of coal gasification is to inject water vapor into the coal gasification channel and form water gas through chemical reaction; coal underground combustion and heat exchange need to increase a heat exchange pipe, and the water injection medium only exists in the heat exchange pipe, and the temperature, flow rate and other parameter changes of the heat exchange medium need to be monitored in the experiment.

[0005] The products are different, and the pressure test data difference is large. The coal gasification contains CO formed by incomplete combustion of coal, H2 produced by water gas reaction, and CH4 such as carbon hydrogen gas produced by coal dry distillation, and the gas volume is significantly larger than the injected gas; in the coal combustion experiment, the product is mainly CO2 formed by complete combustion of coal, and the gas volume is not much different from the injected gas;

[0006] The reaction stage is different, and the temperature parameter data difference is large. The principle process of coal combustion compared with underground gasification is relatively simple and easy to operate, which is equivalent to only retaining the oxidation part of underground gasification, and the essence is to completely burn the coal in the range through combustion reaction (oxidation), and release heat.

[0007] The existing experiment requires complexity, the existing experimental device requires built-in heat exchange, the size requirement is accurate, and the sealing condition requirement is strict. The single experiment device must be completely sealed, and the post-experiment processing procedure is complex. The verification influences the experimental period. INVENTION CONTENTS

[0008] The utility model aims at providing a kind of in situ combustion energy acquisition experimental device of simple, using modular design, reduce the use of complex components, reduce manufacturing difficulty and cost, it is convenient to install and post-experimental maintenance, reduce the waste of material, without complex operation or professional skill, it is suitable for application under various environmental conditions.

[0009] The utility model discloses a simple in-situ combustion energy acquisition experimental device, including water bath box and the combustion device body of setting in water bath box, the both ends of combustion device body are connected respectively with the oxygen gas inlet pipeline and tail gas outlet pipeline of passing through water bath box, be provided with temperature detection device for detecting the temperature change of combustion on combustion device body, the quality monitoring spring for monitoring the quality change of coal combustion is provided with under combustion device body, be provided with pressure monitoring device for monitoring the gas pressure change before and after combustion reaction in oxygen gas inlet pipeline and tail gas outlet pipeline.

[0010] As the preferred of the above-mentioned scheme, the temperature detection device comprises a first temperature probe arranged in the water bath box and a second temperature probe arranged in the combustion device body, and the first temperature probe and the second temperature probe are equidistantly arranged in the water bath box and the combustion device body.

[0011] Further preferably, the water bath box is coated with a heat insulation material.

[0012] Further preferably, the pressure monitoring device comprises a first pressure probe arranged in the oxygen gas inlet pipeline and a second pressure probe arranged in the tail gas outlet pipeline.

[0013] Further preferably, the tail gas outlet pipeline is connected with a tail gas treatment device, the tail gas treatment device is filled with lime water, and the tail gas outlet pipeline is inserted into the lime water.

[0014] Further preferably, the oxygen gas inlet pipeline is connected with an oxygen storage tank at the front end.

[0015] Further preferably, the oxygen gas inlet pipeline and the tail gas outlet pipeline are both provided with a metering pump.

[0016] The utility model has the advantages that: the experiment only needs a water bath box and a combustion device body for coal combustion, the measuring instruments involved are simple, and the cost is low; the combustion device body is arranged in the water bath box, and a temperature detection device is arranged to measure the heat change in the combustion device body and the water bath box during coal combustion, so that a heat exchange experiment can be carried out; the air tightness is good, the gas passage is only the tail gas pipe for exhaust, the gas leakage risk is reduced, the deformation scale difference of the quality detection spring before and after the experiment is recorded, so that the data of the change of the coal quality in the combustion device with time can be calculated, and the accuracy of the generated gas related data is ensured; the structure is simple and easy to disassemble; the experiment process and the finishing work do not need complicated procedures, and the experiment efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure diagram of the utility model. DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with the drawings and examples.

[0019] As Figure 1 shown in the figure, a simple in-situ combustion energy extraction experimental device includes a water bath box 1 and a combustion device body 2 arranged in the water bath box 1. The two ends of the combustion device body 2 are respectively connected with an oxygen inlet pipeline 3 and an exhaust gas outlet pipeline 4 penetrating through the water bath box 1. The combustion device body 2 is provided with a temperature detection device for detecting the change of combustion temperature. A mass monitoring spring 5 for monitoring the change of coal combustion quality is arranged below the combustion device body 2. The oxygen inlet pipeline 3 and the exhaust gas outlet pipeline 4 are provided with a pressure monitoring device for monitoring the change of gas pressure before and after the combustion reaction.

[0020] The temperature detection device includes a first temperature probe 6 arranged in the water bath box 1 and a second temperature probe 7 arranged in the combustion device body 2. The first temperature probe 6 and the second temperature probe 7 are equidistantly arranged in the water bath box 1 and the combustion device body 2. The change of temperature in the water bath box 1 and the combustion device body 2 and the difference of temperature in the water bath box 1 and the combustion device body 2 are measured by the first temperature probe 6 and the second temperature probe 7, so as to realize the measurement of heat exchange experiment.

[0021] The water bath box 1 is coated with heat insulation material. The heat insulation material is arranged to avoid the temperature reduction of the water bath box 1, so as to affect the accuracy of the heat exchange experiment.

[0022] The pressure monitoring device includes a first pressure probe 8 arranged in the oxygen inlet pipeline 3 and a second pressure probe 9 arranged in the exhaust gas outlet pipeline 4. The pressure parameters of oxygen and exhaust gas are recorded by the first pressure probe 8 and the second pressure probe 9, so as to facilitate subsequent calculation.

[0023] The exhaust gas outlet pipeline 4 is connected with an exhaust gas treatment device 10. Lime water is arranged in the exhaust gas treatment device 10. The exhaust gas outlet pipeline 4 is inserted into the lime water. The exhaust gas contains carbon dioxide. The carbon dioxide in the exhaust gas is removed by the lime water, and calcium oxide is produced, which is used to measure the amount of coal burned in the reaction process.

[0024] The front end of the oxygen inlet pipeline is connected with an oxygen storage tank 11. The oxygen inlet pipeline 3 and the exhaust gas outlet pipeline 4 are both provided with a metering pump (not shown in the figure, which is prior art and will not be described here). The amount of oxygen inlet and the amount of exhaust gas outlet are measured by the metering pump, and the mass of calcium carbonate produced after the reaction of carbon dioxide in the exhaust gas with lime water is used to calculate the amount of coal burned.

[0025] The experiment only needs a water bath box 1 and a combustion device body 2 for coal combustion, the involved measuring instruments are simple, and the cost is low; the combustion device body 2 is arranged in the water bath box 1, temperature detection devices are arranged to measure the heat change in the combustion device body 2 and the water bath box 1 during the coal combustion, heat exchange experiments are carried out, the air tightness is good, the gas passage is only the tail gas pipe for exclusion, the gas leakage hidden danger is reduced, the deformation scale difference of the mass detection spring before and after the experiment is recorded, thereby the coal mass change data in the combustion device with time are calculated, the accuracy of the generated gas related data is guaranteed; the structure is simple and easy to disassemble; the experiment process and the end processing work do not need complicated procedures, and the experiment efficiency is fast.

[0026] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A simple in-situ combustion energy harvesting experimental device, characterized in that: The device includes a water bath (1) and a combustion device body (2) installed inside the water bath (1). The two ends of the combustion device body (2) are respectively connected to an oxygen inlet pipe (3) and a tail gas outlet pipe (4) passing through the water bath (1). The combustion device body (2) is equipped with a temperature detection device for detecting changes in combustion temperature. The combustion device body (2) is equipped with a mass monitoring spring (5) for monitoring changes in coal combustion quality below it. The oxygen inlet pipe (3) and the tail gas outlet pipe (4) are equipped with pressure monitoring devices for monitoring changes in gas pressure before and after the combustion reaction.

2. The simplified in-situ combustion energy harvesting experimental device according to claim 1, characterized in that: The temperature detection device includes a first temperature probe (6) disposed in the water bath (1) and a second temperature probe (7) disposed in the combustion device body (2). The first temperature probe (6) and the second temperature probe (7) are disposed at equal intervals in the water bath (1) and the combustion device body (2).

3. The simplified in-situ combustion energy harvesting experimental device according to claim 2, characterized in that: The water bath (1) is coated with heat insulation material.

4. The simplified in-situ combustion energy harvesting experimental device according to claim 1, characterized in that: The pressure monitoring device includes a first pressure probe (8) installed in the oxygen inlet pipe (3) and a second pressure probe (9) installed in the exhaust gas outlet pipe (4).

5. The simplified in-situ combustion energy harvesting experimental device according to claim 1, characterized in that: The exhaust gas outlet pipe (4) is connected to an exhaust gas treatment device (10), which contains lime water, and the exhaust gas outlet pipe (4) is inserted into the lime water.

6. The simplified in-situ combustion energy harvesting experimental device according to claim 5, characterized in that: An oxygen storage tank (11) is connected to the front end of the oxygen inlet pipe.

7. The simplified in-situ combustion energy harvesting experimental device according to claim 6, characterized in that: Metering pumps are installed on both the oxygen inlet pipe (3) and the exhaust pipe (4).

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