阅读说明：本技术 一种耦合作用下煤低温氧化气体测试装置及其使用方法 (Coal low-temperature oxidizing gas testing device under coupling effect and using method thereof ) 是由 周亮 王庆国 戴广龙 邱进伟 唐明云 秦汝祥 于 2021-01-28 设计创作，主要内容包括：本发明公开一种耦合作用下煤低温氧化气体测试装置及其使用方法,测试装置包括氮气罐,所述氮气罐的一端连接有密封箱,氮气罐与密封箱之间设有解压阀和压力计,密封箱的一端与氮气罐紧固连接,另一端与加湿器连接,密封箱与加湿器之间设有第一单向阀和干燥器,加湿器的一端连接有氮气浴箱,另一端连接有储水箱,加湿器与氮气浴箱之间设有第一流量计和阻火阀,氮气浴箱的一端连接有色谱分析仪,另一端连接有加热器,氮气浴箱的一端连接有感温器。本发明测试装置,样品罐位于氮气浴箱内,装置密封,发生爆炸,不会产生连锁反应,安全性好,设有多个阀门,防止燃烧爆炸,采用气浴加热,保证加热均匀,反应充分实验结果精确。(The invention discloses a device for testing coal low-temperature oxidation gas under a coupling effect and a using method thereof. According to the testing device, the sample tank is positioned in the nitrogen bath box, the device is sealed and explodes, chain reaction cannot be generated, the safety is good, a plurality of valves are arranged, combustion and explosion are prevented, heating is uniform by adopting gas bath heating, and the experimental result is accurate after the reaction is full.)

1. A testing device for low-temperature coal oxidation gas under a coupling effect comprises a nitrogen tank (1), and is characterized in that one end of the nitrogen tank (1) is connected with a sealing box (4), a pressure relief valve (2) and a pressure gauge (3) are arranged between the nitrogen tank (1) and the sealing box (4), one end of the sealing box (4) is fixedly connected with the nitrogen tank (1), and the other end of the sealing box is connected with a humidifier (7);

a first check valve (5) and a dryer (6) are arranged between the seal box (4) and the humidifier (7), one end of the humidifier (7) is connected with a nitrogen bath box (19), the other end of the humidifier is connected with a water storage box (25), a first flow meter (8) and a fire relief valve (9) are arranged between the humidifier (7) and the nitrogen bath box (19), one end of the nitrogen bath box (19) is connected with a chromatographic analyzer (17), the other end of the nitrogen bath box is connected with a heater (20), one end of the nitrogen bath box (19) is connected with a temperature sensor (16), one end of the temperature sensor (16) is connected with the nitrogen bath box (19), the other end of the temperature sensor is connected with a data collector (18), and the chromatographic analyzer (17) is fixedly connected with the data;

an air bag (23) used for storing gas is tightly arranged in the seal box (4), the air bag (23) is tightly connected with the first one-way valve (5), and a piston (24) used for extruding the air bag (23) is arranged in the seal box (4).

2. The device for testing the coal low-temperature oxidation gas under the coupling action according to claim 1, wherein a sprayer (21) for gas humidification is arranged in the humidifier (7), and a gate valve (22) is arranged at the lower end of the humidifier (7).

3. The device for testing the coal low-temperature oxidation gas under the coupling action according to claim 2, wherein one end of the water storage tank (25) is fixedly connected with the gate valve (22), the other end of the water storage tank is fixedly connected with the sprayer (21), and a second one-way valve (31) and a second flow meter (32) are arranged between the water storage tank (25) and the sprayer (21).

4. The device for testing the coal low-temperature oxidation gas under the coupling action according to claim 3, wherein a first air inlet (28) and a second air inlet (27) for air inlet are formed in the nitrogen bath box (19), the preheating pipe (10) is fixedly arranged in the air inlet (28), an air outlet (26) is formed in the nitrogen bath box (19), a heater (20) is arranged between the air outlet (26) and the second air inlet (27), a sample tank (12) for placing a coal sample is arranged on the nitrogen bath box (19), the sample tank (12) is fixedly connected with the chromatographic analyzer (17), and a mounting hole (29) for fixing a temperature sensor is fixedly formed in the nitrogen bath box (19).

5. The device for testing the coal low-temperature oxidizing gas under the coupling action according to claim 4, wherein a sealing cover (11) is arranged in the sample tank (12), a heat insulation cover is arranged on the sample tank (12), the sealing cover (11) and the heat insulation cover are both provided with rupture discs (13), temperature sensing probes (14) are symmetrically distributed in the sample tank (12), the temperature sensing probes (14) are tightly connected with a temperature sensor (16), and the output end of the temperature sensor (16) is tightly connected with a data collector (18).

6. The device for testing the coal low-temperature oxidation gas under the coupling action according to claim 5, wherein a gas mixture is arranged in the air bag (23), and the gas mixture is composed of gas, nitrogen and oxygen.

7. The use method of the device for testing the coal low-temperature oxidation gas under the coupling action based on any one of claims 1 to 6 is characterized by comprising the following steps:

s1, pretreatment

Starting a heat source (20), setting the temperature, preheating a nitrogen bath box (19), and starting a data collector (18), a temperature sensor (16) and a chromatographic analyzer (17) when the nitrogen bath box is heated to the set temperature;

s2, feeding

Opening the sealing cover (11), placing the coal sample in the sample tank (12) through the sealing cover (11), modifying the sealing cover (11) and the heat insulation cover, and injecting the gas mixed gas into the air bag (23);

s3 intake air

Opening the nitrogen tank (1), adjusting the pressure of nitrogen, enabling the nitrogen to enter the sealing box (4) through the pressure relief valve (2) and the pressure gauge (3), and extruding the piston (24) to enable the piston (24) to extrude the gas mixed gas in the air bag (23);

s4, humidification

The gas mixed gas passes through a first one-way valve (5) and a dryer (6), residual moisture in the gas mixed gas is removed, the gas mixed gas enters a heater (7), an atomizer (21) is opened, the first one-way valve (5) and a second one-way valve (31) are controlled, the gas mixed gas is humidified to obtain gas mixed gas with different humidity, and the residual water flows back to a water storage tank (21) through a gate valve (22);

s5, heating gas

Mixed gas with different humidity enters a nitrogen bath box (19) through a first flowmeter (8) and a fire retardant valve (9), the gas is preheated by a preheating pipe (10), the preheated gas enters a heater (20) through a gas outlet (26) for heating, and enters a sample tank (12) through a second gas inlet (27);

s6, reaction

The mixed gas enters a sample tank (12) to react with a coal sample, the temperature, the ambient temperature and the gas components in the sample tank (12) are detected by a temperature sensor (16) and a chromatographic analyzer (17), and data are collected by a data collector (18) until the highest temperature required by the experiment is reached, so that the experiment is completed;

s7, cleaning

And (3) closing the device, and taking out the sample tank (12) when the temperature in the nitrogen bath box (19) is lower than 40 ℃ to clean the coal sample.

Technical Field

The invention relates to a device for testing low-temperature coal oxidizing gas under a coupling effect and a using method thereof, in particular to a device for testing low-temperature coal oxidizing gas under a coupling effect and a using method thereof.

Background

The spontaneous combustion accident of the coal in the goaf is one of typical disasters of a mine, the spontaneous combustion of the coal wastes a large amount of resources, the generated toxic and harmful gas pollutes the environment, and when the spontaneous combustion disaster of the coal in the goaf and a gas disaster coexist, the disaster caused by the spontaneous combustion of the coal is more serious, and even the gas explosion can be caused. At present, the test and research of low-temperature coal oxidizing gas under the combined action of gas and humidity are lacked, and the development of prediction work of coal spontaneous combustion and gas symbiotic disasters is limited.

The existing experimental device for testing the low-temperature oxidation gas of the coal is basically characterized in that a certain amount of airflow is introduced into a coal sample tank, the coal sample is heated to a set temperature, gas components at the outlet of the coal sample tank are detected, the change rule of the gas along with the temperature is analyzed, the gas is easy to explode at a high temperature, the safety of the device is low, the coal cannot spontaneously combust due to the traditional heating water bath, the gas is heated unevenly, and the incomplete reaction is caused.

Aiming at the existing problems, a device for testing the coal low-temperature oxidizing gas under the coupling effect and a using method thereof are designed.

Disclosure of Invention

The invention aims to provide a device for testing coal low-temperature oxidation gas under the coupling effect and a using method thereof.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a coal low temperature oxidation gas testing arrangement under coupling, testing arrangement include the nitrogen gas jar, the one end of nitrogen gas jar is connected with the seal box, is equipped with pressure relief valve and pressure gauge between nitrogen gas jar and the seal box, the one end and the nitrogen gas jar fastening connection of seal box, and the other end is connected with the humidifier.

Be equipped with first check valve and desicator between seal box and the humidifier, the one end of humidifier is connected with nitrogen gas bath, and the other end is connected with the storage water tank, is equipped with first flowmeter and back-fire relief valve between humidifier and the nitrogen gas bath, and the colour spectrum appearance is connected to the one end of nitrogen gas bath, and the other end is connected with the heater, and the one end of nitrogen gas bath is connected with the temperature sensor, and the one end and the nitrogen gas bath of temperature sensor are connected, and the other end is connected with data collection station, and the colour spectrum appearance is connected with data collection station fastening.

The gas bag that is used for saving the gas is tightly equipped with in the seal box, gasbag and first check valve fastening connection are equipped with the piston that is used for extrudeing the gasbag in the seal box.

Furthermore, a sprayer for humidifying gas is arranged in the humidifier, and a gate valve is arranged at the lower end of the humidifier.

Furthermore, one end of the water storage tank is fixedly connected with the gate valve, the other end of the water storage tank is fixedly connected with the sprayer, and a second one-way valve and a second flowmeter are arranged between the water storage tank and the sprayer.

Further, be equipped with the first air inlet and the second air inlet that are used for admitting air on the nitrogen gas bath, the internal fixation of air inlet is equipped with the preheating tube, is equipped with the gas outlet on the nitrogen gas bath, is equipped with the heater between gas outlet and the second air inlet, is equipped with the sample jar that is used for placing the coal sample on the nitrogen gas bath, and sample jar and chromatographic analyzer fastening connection, the fastening is equipped with the mounting hole that is used for fixed temperature sensor in the nitrogen gas bath.

Furthermore, a sealing cover is arranged in the sample tank, a heat insulation cover is arranged on the sample tank, rupture discs are arranged on the sealing cover and the heat insulation cover, temperature sensing probes are symmetrically distributed in the sample tank, the temperature sensing probes are fixedly connected with a temperature sensor, and the output end of the temperature sensor is fixedly connected with a data acquisition unit.

Further, a gas mixed gas is arranged in the air bag, and the gas mixed gas is composed of a gas, nitrogen and oxygen.

A use method of a coal low-temperature oxidation gas testing device under the coupling effect comprises the following steps:

s1, pretreatment

And starting a heat source, setting the temperature, preheating the nitrogen bath box, and starting the data collector, the temperature sensor and the chromatographic analyzer when the nitrogen bath box is heated to the set temperature.

S2, feeding

And opening the sealing cover, placing the coal sample in the sample tank through the sealing cover, changing the sealing cover and the heat insulation cover, and injecting the gas mixed gas into the air bag.

S3 intake air

And opening the nitrogen tank, adjusting the pressure of the nitrogen, enabling the nitrogen to enter the sealing box through the pressure relief valve and the pressure gauge, and extruding the piston to enable the piston to extrude the gas mixed gas in the air bag.

S4, humidification

The gas mixed gas passes through the first one-way valve and the dryer, residual moisture in the gas mixed gas is removed, the gas mixed gas enters the heater, the sprayer is opened, the first one-way valve and the second one-way valve are controlled, the gas mixed gas is humidified, gas mixed gas with different humidity is obtained, and the residual water flows back to the water storage tank through the gate valve.

S5, heating gas

In the gas mist of different humidity got into the nitrogen gas bath through first flowmeter and back-fire relief valve, the preheating tube preheated gas, and gas after preheating got into the heater through the gas outlet and heats in, through the second air inlet, got into in the sample jar.

S6, reaction

The mixed gas enters the sample tank to react with the coal sample, the temperature, the ambient temperature meter and the gas components in the sample tank are detected through the temperature sensor and the chromatographic analyzer, and the data is collected through the data collector until the highest temperature required by the experiment is reached, so that the experiment is completed.

S7, cleaning

And closing the device, and taking out the sample tank and cleaning the coal sample when the temperature in the nitrogen gas bath box is lower than 40 ℃.

The invention has the beneficial effects that:

1. according to the testing device, the sample tank is positioned in the nitrogen bath box, the device is sealed and explodes, no chain reaction is generated, the safety is good, and the device is provided with a plurality of valves to prevent combustion and explosion;

2. the testing device provided by the invention has the advantages that the mixed gas is prepared in advance, the accurate gas components are ensured, the piston compression air bag extrudes the mixed gas, the gas flow rate is convenient to control, the gas bath heating is adopted, the high temperature can be heated, the sample coal combustion is ensured, the uniform heating is ensured, and the experiment result is accurate due to the full reaction.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a testing apparatus according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a coal low temperature oxidation gas testing arrangement under coupling, testing arrangement includes nitrogen gas jar 1, as shown in figure 1, the one end of nitrogen gas jar 1 is connected with seal box 4, be equipped with pressure relief valve 2 and pressure gauge 3 between nitrogen gas jar 1 and the seal box 4, the one end and the nitrogen gas jar 1 fastening connection of seal box 4, the other end is connected with humidifier 7, be equipped with first check valve 5 and desicator 6 between seal box 4 and the humidifier 7, the one end of humidifier 7 is connected with nitrogen gas bath 19, the other end is connected with storage water tank 25, be equipped with first flowmeter 8 and back-fire relief valve 9 between humidifier 7 and the nitrogen gas bath 19, colored spectrum analyzer 17 is connected to the one end of nitrogen gas bath 19, the other end is connected with heater 20, the one end of nitrogen gas bath 19 is connected with temperature sensor 16, the one end and the nitrogen gas bath 19 of temperature sensor 16 are connected, the other end is connected with data collection station 18.

An air bag 23 used for storing gas is tightly arranged in the seal box 4, the air bag 23 is tightly connected with the first one-way valve 5, and a piston 24 used for extruding the air bag 23 is arranged in the seal box 4.

A sprayer 21 for humidifying the gas is provided in the humidifier 7, and a gate valve 22 is provided at the lower end of the humidifier 7.

One end of the water storage tank 25 is tightly connected with the gate valve 22, the other end is tightly connected with the sprayer 21, and a second one-way valve 31 and a second flowmeter 32 are arranged between the water storage tank 25 and the sprayer 21.

Be equipped with first air inlet 28 and the second air inlet 27 that is used for admitting air on the nitrogen gas bath 19, the air inlet 28 internal fixation is equipped with preheating tube 10, is equipped with gas outlet 26 on the nitrogen gas bath 19, is equipped with heater 20 between gas outlet 26 and the second air inlet 27, is equipped with the sample jar 12 that is used for placing the coal sample on the nitrogen gas bath 19, sample jar 12 and chromatographic analyzer 17 fastening connection, and the fastening is equipped with the mounting hole 29 that is used for fixed temperature sensor in the nitrogen gas bath 19.

A sealing cover 11 is arranged in a sample tank 12, a heat insulation cover is arranged on the sample tank 12, rupture discs 13 are arranged on the sealing cover 11 and the heat insulation cover, temperature sensing probes 14 are symmetrically distributed in the sample tank 12, the temperature sensing probes 14 are fixedly connected with a temperature sensor 16, and an output end of the temperature sensor 16 is fixedly connected with a data collector 18.

The air bag 23 is of a cylindrical structure, the compression area is unchanged during extrusion, the air bag is uniformly compressed, and gas mixed gas is arranged in the air bag 23 and consists of gas, nitrogen and oxygen.

A use method of a coal low-temperature oxidation gas testing device under the coupling effect comprises the following steps:

s1, pretreatment

The heat source 20 is started, the temperature is set, the nitrogen bath box 19 is preheated, and when the temperature is heated to the set temperature, the data collector 18, the temperature sensor 16 and the chromatographic analyzer 17 are started.

S2, feeding

The sealing cover 11 is opened, the coal sample is placed in the sample tank 12 through the sealing cover 11, the sealing cover 11 and the heat insulation cover are modified, and the gas mixture gas is injected into the air bag 23.

S3 intake air

And opening the nitrogen tank 1, adjusting the pressure of the nitrogen, enabling the nitrogen to enter the seal box 4 through the pressure relief valve 2 and the pressure gauge 3, and extruding the piston 24 to enable the piston 24 to extrude the gas mixed gas in the air bag 23.

S4, humidification

The gas mixture passes through the first one-way valve 5 and the dryer 6, the residual moisture in the gas mixture is removed, the gas mixture enters the heater 7, the sprayer 21 is opened, the first one-way valve 5 and the second one-way valve 31 are controlled, the gas mixture is humidified, the gas mixture with different humidity is obtained, and the residual water flows back to the water storage tank 21 through the gate valve 22.

S5, heating gas

The mixed gas of different humidity gets into nitrogen gas bath 19 through first flowmeter 8 and back-fire relief valve 9 in, and the preheating pipe 10 preheats gas, and the gas after preheating gets into heater 20 through gas outlet 26 and heats in, and through second air inlet 27, gets into in the sample jar 12.

S6, reaction

The mixed gas enters the sample tank 12 to react with the coal sample, the temperature, the ambient temperature and the gas components in the sample tank 12 are detected through the temperature sensor 16 and the chromatographic analyzer 17, and data are collected through the data collector 18 until the highest temperature required by the experiment is reached, so that the experiment is completed.

S7, cleaning

The apparatus was closed and when the temperature in the nitrogen bath 19 was below 40 ℃, the sample tank 12 was removed and the coal sample was cleaned.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.