CN108627415A - A kind of deep mining stand under load coal gas absorption-desorption experimental system and method - Google Patents

A kind of deep mining stand under load coal gas absorption-desorption experimental system and method Download PDF

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Publication number
CN108627415A
CN108627415A CN201810328166.4A CN201810328166A CN108627415A CN 108627415 A CN108627415 A CN 108627415A CN 201810328166 A CN201810328166 A CN 201810328166A CN 108627415 A CN108627415 A CN 108627415A
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China
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tank
pressure
valve
desorption
adsorption
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CN201810328166.4A
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Chinese (zh)
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刘佳佳
高建良
马权
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Henan University of Technology
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Henan University of Technology
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22Fuels, explosives
    • G01N33/222Solid fuels, e.g. coal
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N7/00Analysing materials by measuring the pressure or volume of a gas or vapour
    • G01N7/02Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder
    • G01N7/04Analysing materials by measuring the pressure or volume of a gas or vapour by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder by absorption or adsorption alone
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N7/00Analysing materials by measuring the pressure or volume of a gas or vapour
    • G01N7/14Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference

Abstract

A kind of deep mining stand under load coal gas adsorption and desorption experiment system and method.The present invention includes:Gas bottle, helium tank, vacuum pump, data collecting system, pressure sensor, high temperature and pressure case, delicate flow meter, adsorption-desorption tank, with reference to the components such as tank, pressure gauge and valve form.The gas bottle is connected by pressure reducing valve one with pressure gauge one, the helium tank is connected by pressure reducing valve two with pressure gauge two, the pressure gauge one is connected by pipeline with vacuum pump, the vacuum pump is connected by pipeline with adsorption-desorption tank and with reference to tank, the adsorption-desorption tank and the reference external pressure sensor of tank, the pressure sensor is connected by data line and capture card with data collecting system, the adsorption-desorption tank is connected with delicate flow meter, and the reference tank is emptied by valve.Present invention is mainly used for the adsorption and desorption experiments of stand under load coal gas under the conditions of deep coalmining, are a kind of laboratory facilities of reliable simplicity.

Description

A kind of deep mining stand under load coal gas absorption-desorption experimental system and method
Technical field
The present invention relates to the adsorption-desorption technical field of deep coalmining gas more particularly to a kind of deep mining stands under load Coal gas absorption-desorption experimental system and method.
Background technology
With being continuously increased for China's coal-mine mining depth, most of mine progresses into deep mining environment, coal seam Gas pressure, content gradually increase, and cause the gas accident of coal mine that ascendant trend is also presented, and accurately grasp in deep fractures watt This adsorption-desorption rule is the premise prevented Gas Disaster and implement gas pumping technology, and the flowing of gas in coal seam is first It first needs, by desorption, then to flow out coal body by coal body hole fissure system again.Since underground major part coal body is in compression shape In state, ambient stress has important influence for the outflow process of coal body.For seam mining, exploitation disturbance can cause Coal body institute compression chord apparent variation occurs, and then gas pumping can be made a significant impact.Especially with digging depth The increase of degree, crustal stress increase, and exploitation disturbance becomes more acutely.
Currently, the adsorption and desorption experiment of coal sample gas is based on the coal dust of collection in worksite coal sample making, this is opened with deep The raw coal sample adopted has very big difference in terms of internal structure and stratification construction, in particular under the high temperature and pressure of deep by It carries absorption-desorption pilot system of the coal gas in mining active process to lack, only absorption-desorption pilot system automates journey It is poor to spend relatively low, experimental result accuracy, real-time, therefore carries out the experiment of deep mining stand under load coal gas absorption-desorption The research of system and method is just put in face of scientific worker naturally.The device can be with real simulation deep mining coal gas Adsorption-desorption rule, certain theoretical ginseng can be provided for stand under load coal gas extraction engineering design under Mining in Deep-lying Conditions It examines, to improving gas pumping rate, prevention coal and gas prominent, reducing caused by drawing-off gas " greenhouse effects " with important Theory significance and real value.
Invention content
The object of the present invention is to provide a kind of deep mining stand under load coal gas absorption-desorption experimental system and methods.
Above-mentioned purpose is realized by following technical scheme:
1. a kind of deep mining stand under load coal gas absorption-desorption experimental system and method, the system is mainly by gas bottle, helium Gas cylinder, vacuum pump, data collecting system, pressure sensor, high temperature and pressure case, delicate flow meter, adsorption-desorption tank, with reference to tank, The components such as pressure gauge and valve form.It is characterized in that:The gas bottle passes through pressure reducing valve one and one phase of valve one and pressure gauge Even, the helium tank is connected by pressure reducing valve two with valve five and pressure gauge two, and the pressure gauge one passes through pipeline and valve Men Eryu vacuum pumps are connected, and the vacuum pump is connected by pipeline and valve with adsorption-desorption tank and with reference to tank, the suction Attached solution cucurbitula and the reference external pressure sensor of tank, the pressure sensor are connected by data line with data collecting system, The adsorption-desorption tank is connected by pipeline with valve and delicate flow meter, and the reference tank is emptied by valve.
2. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and side Method, it is characterized in that:Pressure reducing valve one, valve one, institute are installed on pipeline between the gas bottle and the pressure gauge one Valve three, valve six, the pressure are installed on pipeline between the pressure gauge one and the coal sample adsorption-desorption tank stated Valve four, valve seven are installed on table two and the pipeline with reference between tank, absorption is equipped in the high temperature and pressure case It solves cucurbitula and refers to tank and high temperature resistant closed-loop, porous plate and coal sample, the adsorption-desorption are installed in adsorption-desorption tank Valve eight is installed, the helium tank is connected with high temperature and pressure case, and passes through valve on the pipeline that tank is connected with delicate flow meter Door discharge.
3. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and side Method, it is characterized in that:The pressure sensor, delicate flow meter, high temperature and pressure case pass through capture card and data line and data Acquisition system is connected, and the data of all acquisitions realize continuity, real-time, accuracy, ensure that the reliability of experimental system And accuracy.
4. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and side Method, it is characterized in that:The pressure gauge one is used to detect the pressure of gas bottle aerating, and the pressure reducing valve one, pressure reducing valve two are used In the outlet pressure for adjusting gas, the pressure gauge two is used to detect the pressure of helium tank aerating, the adsorption-desorption tank Interior porous plate can ensure gas even into the high temperature and pressure case can be accurately controlled the temperature and pressure of experimental provision Power, peripheral wall use heat-insulating material, pipeline and each valve to use wear-resistant pipeline and high pressure sealing joint, the device Junction is equipped with high pressure resistant combination mat and sealant tape.
Beneficial effects of the present invention:
1. experimental temperature can be arranged under predetermined condition for the high temperature and pressure case of the present invention, temperature controlling range:0 ~ 100 °, essence Degree is up to 0.01 °;Pressure control range:0 ~ 80MPa, precision is up to 0.01MPa;Pressure sensor and delicate flow meter can be surveyed The case where trying coal sample adsorption-desorption gas, data acquisition control system can be used for checking experiment with automatic data collection, helium tank The air-tightness of device.
2. the good cylinder coal sample of use production of the present invention, diameter 50mm, height 100mm raw coal sample.Experiment stream Journey:1. needing to be detected the air-tightness of experimental provision first, He gas cylinders upper valve five is opened(11), valve four(8), valve Door seven(18)With valve six(13), He gas is filled with adsorption-desorption tank and with reference in tank, keeps 5h or more under pressure, It observes adsorption-desorption cylinder and whether there is or not significant changes with reference to cylinder pressure.If without significant change, pressure is continued growing, until the blowing pressure Reach the maximum pressure that experiment needs.
2. the deep mining raw coal samples dried made in advance is fitted into adsorption-desorption tank after 24 hours, and connect The other systems such as good pressure sensor;In the case where system connects correctly and air-tightness is intact, vacuum pump upper valve is opened Two(5)It, first will be high after vacuum outgas is completed to entirely testing pipeline and adsorption-desorption tank and being de-gassed with reference to tank The temperature of warm high-voltaghe compartment is adjusted to current experiment desirable value, then a certain amount of a concentration of to pipe-line system and with reference to being filled in tank 99.99% methane gas, pressure sensor(22)Initial reference pressure tank is recorded, all valves are closed, only need to open valve six (13), valve seven(18), valve eight(20), methane gas can be from, to the migration of adsorption-desorption tank, pass through pressure sensor with reference to tank Connection computer reacts the pressure for each period referring to tank and adsorption-desorption tank, after reaching balance, based on this, to reference to tank Second of inflation, repeats above-mentioned experimental procedure, gradually improves gas pressure, until coal column no longer adsorption gas, record Each period relevant experimental data, it is believed that absorption has reached balance.
3. desorption process is the inverse process of adsorption process.It is first shut off valve six(13), valve seven(18), open valve Nine(23)Residual gas gas in tank will be referred to all to release, close valve nine(23), open vacuum-pumping valve two(5)To reference Tank is de-gassed, and valve six is opened after the completion of degassing(13), valve seven(18), valve eight(20), gas can be by absorption solution Cucurbitula is quickly migrated to reference to tank, and connecting data collecting system by pressure sensor reflects that each moment refers to tank and adsorption-desorption The pressure of tank, delicate flow meter record real-time traffic, after reaching balance namely indicate that desorption process is completed, and record good each moment Related data;After the completion of waiting for one group of experiment, experiment coal sample is taken out;Above step is repeated, coal under other high-temperature and high-pressure conditions is carried out The adsorption and desorption experiment of sample.
3. the present invention is by the research to a kind of deep mining stand under load coal gas absorption-desorption experimental system and method, The adsorption-desorption rule of gas in coal seam can be accurately grasped in certain degree, be also stand under load coal body under Mining in Deep-lying Conditions Gas pumping engineering design provides certain theoretical reference.The experimental result of this experimental rig is to optimization gas pumping arrangement ginseng Number improves gas pumping rate, prevention coal and gas prominent, reduces caused by drawing-off gas " greenhouse effects " with important reason By meaning and real value.
Description of the drawings:
Attached drawing 1 is the structural schematic diagram of a kind of deep mining stand under load coal gas absorption-desorption experimental system of the present invention and method.
Wherein:1, gas bottle;2, valve one;3, pressure gauge one;4, pressure reducing valve one;5, valve two;6, vacuum pump;7, valve Three;8, valve four;9, pressure reducing valve two;10, pressure gauge two;11, valve five;12, helium tank;13 valves six;14, coal sample;15, more Orifice plate;16, high temperature and pressure case;17, adsorption-desorption tank;18, valve seven;19, with reference to tank;20, valve eight;21, delicate flow meter; 22, pressure sensor;23, valve nine;24, pressure sensor two;25, data collecting system;26, exhaust outlet.
Specific implementation mode:
Embodiment 1:
A kind of deep mining stand under load gas adsorption-desorption experiment system and method, the invention mainly by gas bottle 1, helium tank 12, Vacuum pump 6, data collecting system 25, pressure sensor 22,24, high temperature and pressure case 16, delicate flow meter 21, coal sample adsorption-desorption Tank 17 is formed with reference to components such as tank 19, pressure gauge 3,10 and valves.It is characterized in that:The gas bottle 1 passes through pressure reducing valve 1 It is connected with valve 1 and pressure gauge 1, the helium tank 12 passes through pressure reducing valve 29 and 2 10 phase of valve 5 11 and pressure gauge Even, the pressure gauge 1 is connected by pipeline and valve 25 with vacuum pump 6, and the vacuum pump 6 passes through pipeline and valve It is connected with adsorption-desorption tank 17 and reference tank 19, the adsorption-desorption tank 17 and reference 19 external pressure sensor 22,24 of tank, The pressure sensor 22,24 is connected by data line with data collecting system 25, and the adsorption-desorption tank 17 passes through pipe Road is connected with valve 8 20 and delicate flow meter 21, and the reference tank 19 is emptied by valve.
Embodiment 2:
According to a kind of deep mining stand under load coal gas absorption-desorption experimental system described in embodiment 1 and method, feature It is:Pressure reducing valve 1, valve 1, the pressure are installed on pipeline between the gas bottle 1 and the pressure gauge 1 Valve 37, valve 6 13, the pressure are installed on pipeline between power table 1 and the coal sample adsorption-desorption tank 17 Valve 48, valve 7 18 be installed, in the high temperature and pressure case 16 on table 2 10 and the pipeline with reference between tank 19 There is adsorption-desorption tank and refer to tank and high temperature resistant closed-loop, porous plate 15 and coal sample 14 are installed in adsorption-desorption tank, it is described The pipeline that is connected with delicate flow meter 21 of adsorption-desorption tank on valve 8 20, the helium tank 12 and high temperature and pressure are installed Case is connected, and is discharged by valve 9 23.
Embodiment 3:
According to a kind of deep mining stand under load coal gas absorption-desorption experimental system described in embodiment 1 and method, feature It is:The pressure sensor 22,24, delicate flow meter 21, high temperature and pressure case 16 pass through capture card and data line and data Acquisition system is connected, and the data of all acquisitions realize continuity, real-time, accuracy, ensure that the reliability of experimental system And accuracy.
Embodiment 4:
According to a kind of deep mining stand under load coal gas absorption-desorption experimental system described in embodiment 1 and method, feature It is:The pressure gauge 1 is used to detect the pressure of 1 aerating of gas bottle, and the pressure reducing valve 1, pressure reducing valve 29 are for adjusting The outlet pressure of gas, the pressure gauge 29 are used to detect the pressure of 12 aerating of helium tank, in the adsorption-desorption tank 17 Porous plate 15 can ensure gas even into, the high temperature and pressure case 16 can be accurately controlled experimental provision temperature and Pressure, peripheral wall use heat-insulating material, pipeline and each valve to use wear-resistant pipeline and high pressure sealing joint, the dress It sets junction and is equipped with high pressure resistant combination mat and sealant tape.
Although above embodiment described the specific implementation mode of the present invention, those skilled in the art can not change On the basis of the principle of the present invention, above-mentioned pilot system and method are omitted and changed.Such as:It can merge the present invention's Experiment flow, substantially identical function is completed according to substantially identical method, finally realizes that substantially identical result then belongs to this The range of invention.Therefore, the scope of the present invention is limited only by the claims that follow.

Claims (4)

1. a kind of deep mining stand under load coal gas absorption-desorption experimental system and method, the invention is mainly by gas bottle(1)、 Helium tank(12), vacuum pump(6), data collecting system(25), pressure sensor(22)(24), high temperature and pressure case(16), it is accurate Flowmeter(21), adsorption-desorption tank(17), with reference to tank(19), pressure gauge(3)(10)It is formed with components such as valves, it is characterized in that: The gas bottle(1)Pass through pressure reducing valve one(4)With valve one(2)With pressure gauge one(3)It is connected, the helium tank(12)It is logical Cross pressure reducing valve two(9)With valve five(11)With pressure gauge two(10)It is connected, the pressure gauge one(1)Pass through pipeline and valve two (5)With vacuum pump(6)It is connected, the vacuum pump(6)Pass through pipeline and valve three(7)With adsorption-desorption tank(17)With with reference to tank (19)It is connected, the adsorption-desorption tank(17)With with reference to tank(19)External pressure sensor(24), the pressure sensor (22)(24)Pass through data line and capture card and data collecting system(25)It is connected, the adsorption-desorption tank(17)Pass through pipeline With valve and delicate flow meter(21)It is connected, the reference tank(19)It is emptied by valve.
2. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and method, special Sign is:The gas bottle(1)With the pressure gauge one(3)Between pipeline on pressure reducing valve one is installed(4), valve one (2), the pressure gauge one(3)With the coal sample adsorption-desorption tank(17)Between pipeline on valve three is installed(7), valve Door six(13), the pressure gauge two(10)With the reference tank(19)Between pipeline on valve four is installed(8), valve Seven(18), the high temperature and pressure case(16)Inside there is adsorption-desorption tank and refers to tank and high temperature resistant closed-loop, adsorption-desorption tank Porous plate is inside installed(15)And coal sample(14), the adsorption-desorption tank and delicate flow meter(21)It is installed on connected pipeline There is valve eight(20), the helium tank(12)It is connected with high temperature and pressure case, and passes through valve nine(23)Discharge.
3. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and method, special Sign is:The pressure sensor(22),(24), delicate flow meter(21), high temperature and pressure case(16)Pass through capture card sum number It is connected with data collecting system according to line, the data of all acquisitions realize continuity, real-time, accuracy, ensure that experiment system The reliability and accuracy of system.
4. a kind of deep mining stand under load coal gas absorption-desorption experimental system according to claim 1 and method, special Sign is:The pressure gauge one(3)For detecting gas bottle(1)The pressure of aerating, the pressure reducing valve one(4), pressure reducing valve two (9)Outlet pressure for adjusting gas, the pressure gauge two(9)For detecting helium tank(12)The pressure of aerating, it is described Adsorption-desorption tank(17)Interior porous plate(15)Gas can be ensured even into the high temperature and pressure case(16)It can be accurate Control experimental provision temperature and pressure, peripheral wall uses heat-insulating material, pipeline and each valve to use wear-resistant pipeline And high pressure sealing joint, the device junction are equipped with high pressure resistant combination mat and sealant tape.
CN201810328166.4A 2018-04-13 2018-04-13 A kind of deep mining stand under load coal gas absorption-desorption experimental system and method Pending CN108627415A (en)

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CN201810328166.4A CN108627415A (en) 2018-04-13 2018-04-13 A kind of deep mining stand under load coal gas absorption-desorption experimental system and method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110030030A (en) * 2019-03-11 2019-07-19 中国矿业大学 A kind of electric pulse fracturing is anti-reflection and adsorption-desorption integrated apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110030030A (en) * 2019-03-11 2019-07-19 中国矿业大学 A kind of electric pulse fracturing is anti-reflection and adsorption-desorption integrated apparatus and method

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