CN105510176B - A kind of coal sample gas negative pressure desorption experiment system - Google Patents

A kind of coal sample gas negative pressure desorption experiment system Download PDF

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CN105510176B
CN105510176B CN201610014944.3A CN201610014944A CN105510176B CN 105510176 B CN105510176 B CN 105510176B CN 201610014944 A CN201610014944 A CN 201610014944A CN 105510176 B CN105510176 B CN 105510176B
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pressure
gas
magnetic valve
valve
coal sample
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CN201610014944.3A
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CN105510176A (en
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张宏图
张健
李涛
徐向宇
魏建平
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河南理工大学
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    • 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

The present invention provides a kind of coal sample gas negative pressure desorption experiment system, and it includes high-pressure air source module, coal sample tank, vacuumizes module, negative pressure pressure control module, parameter acquisition and control module;The present invention uses negative pressure pressure control module, can quickly form coal sample gas negative pressure desorption environmental pressure and stability contorting, realize the research to coal sample subnormal ambient desorption of mash gas rule;The measure of the stripping gas scale of construction is applied in combination using multiple gas mass flow gauge, gathers desorption quantity data in real time, realizes that the desorption quantity using the second as time of day measures, human error when avoiding the draining water gathering of gas law from reading;Design science of the present invention, it is theoretical it is correct, measuring accuracy is high, is easy to promote, can be rationally to determine that coal-bed gas take out new coal seam gas-bearing capacity of negative pressure value and research and development and determines spot sampling method in advance provide fundamental basis.

Description

A kind of coal sample gas negative pressure desorption experiment system

Technical field

The present invention relates to a kind of coal sample gas negative pressure desorption experiment system, belong to coal mine gas diaster prevention and control field, especially It is related to and a kind of is used to accurately probing into adsorption law that gas be under negative pressure desorption environmental pressure and the reasonable coal-bed gas of determination is taken out Adopt the experimental system of negative pressure value.

Background technology

It is two commonly used in the practice of Gas Disaster prevention and cure project that coal seam gas-bearing capacity and reasonable coal-bed gas take out negative pressure in advance Underlying parameter.Gas bearing capacity frequently as Coal bed gas project, coal mine gas disasters danger and gas pumping effect evaluation index, Coal-bed gas takes out negative pressure and restricts the gas pre-drainage cycle in advance, is the key parameter for improving gas pre-drainage efficiency.Therefore, Accurate Determining coal It is effective important foundation for carrying out Gas Disaster preventing and treating that layer gas bearing capacity and rationally determination coal-bed gas take out negative pressure in advance.

Coal seam gas-bearing capacity measure is more use coal mine gas content direct measuring method, more using pressure air holes mouth during sampling Press the disturbance of wind and drilling rod constantly to wash away the ickings of the wall of a borehole and drilling along journey deposition when connecing sample method, but sampling, make acquired The fresh coal sample purity of design attitude of coal sample reduce, numerical value is relatively low when causing the gas loss amount to calculate, in turn results in gas and contains Measuring value error.

Design attitude coal sample purity low present situation during for existing pressure air holes mouth sampling, the sampling mode based on negative pressure deslagging Also gradually proposed by scholar, such as patent CN203772574U, CN103776722A, CN102798548B, the thinking of this method It is to be based on negative-pressure pneumatic Conveying Theory, coal sample motion-promotion force is provided by single negative pressure power source;Bit cutting rib, ickings come off Then gathered via inside drilling rod by suction and conveying, the whole process used time is short, coal sample purity is high, and theoretically a kind of ideal takes Quadrat method.But the reckoning of gas loss amount is also related in sampling process, its reckoning foundation is then coal sample under subnormal ambient Desorption of mash gas rule, but desorption of mash gas law study of the coal sample under subnormal ambient is more weak.Therefore in order to promote base In development and the engineer applied of the spot sampling of negative pressure deslagging theoretical research is desorbed, it is necessary to strengthen coal sample negative pressure.

《Institutes Of Technology Of He'nan's journal (natural science edition)》Interim " the desorption of mash gas rule of coal under subnormal ambient of volume 30 6 Experimental study ";Chinese patent, Patent No. CN203705293U, " coal sample gas adsorption desorption experimental apparatus under the conditions of transformation "; Chinese patent, Publication No. CN103776722A, " the coal seam gas-bearing capacity method of testing sampled under subnormal ambient " etc. are to negative pressure The research of desorption of mash gas rule enters exploration under environment, but the method and experimental system proposed there are problems that it is as follows: 1. Measure Precision is low, controlled range is narrow, and Stress control is unstable;2. negative pressure deslagging sampling process sample rate is very fast, typically 2 Completed in minute, and the metering of above method desorption quantity can not obtain the desorption using the second as time of day using minute as time of day Amount, and then influence gas loss amount projection accuracy.

Coal-bed gas takes out negative pressure and uses negative pressure value 13kPa more in advance at present, but condition of coal seam occurrence, gas permeability of coal seam, coal The difference of layer desorption of mash gas characteristic etc. can make it that gas pre-drainage effect differs when extraction negative pressure is 13kPa, influences shaft production and connects Replace, improve gas pumping efficiency to shorten the gas pre-drainage cycle, the value should make adjustment according to mine is actual.

Chinese patent, Patent No. CN203705293U discloses one kind, and " desorption of coal sample gas adsorption is real under the conditions of transformation Experiment device ", aspirate coal sample desorption of mash gas gas in real time using vavuum pump, be in a way underground gas extraction form again It is existing, but accurately determine that extraction negative pressure value is more difficult, traces it to its cause and is that Stress control uses vavuum pump, negative pressure value is difficult to surely Fixed control.Therefore, it is necessary to propose the coal sample negative pressure desorption experiment system that a set of design science, accurate measurement, observing and controlling are stable in fact, Adsorption law of the gas under negative pressure desorption environment in coal sample is grasped with accurate, comprehensive, to research and develop negative pressure deslagging spot sampling coal Layer gas bearing capacity determination techniques and the rational coal-bed gas forepressure value of determination provide theoretical foundation.

The content of the invention

It is an object of the invention to provide a kind of coal sample negative pressure desorption experiment system, do not require nothing more than its design science, meter Amount is accurate, perfect in shape and function, automaticity are high, and being capable of stability contorting pressure and for studying coal sample gas in negative pressure ring The experimental system of desorption of mash gas rule under border, determine for negative pressure deslagging spot sampling fixed point measure coal seam gas-bearing capacity and rationally Coal-bed gas forepressure provides theoretical foundation.

The present invention is achieved through the following technical solutions:A kind of coal sample gas negative pressure desorption experiment system, it includes High-pressure air source module, vacuumize module, coal sample tank, negative pressure pressure control module, parameter acquisition and control module;Its feature exists In,

Described high-pressure air source module includes high-pressure air source high-purity methane, the gas pressure reducer being sequentially connected in series;

The module that vacuumizes includes vavuum pump, vacuum meter and three-way valve, and the series connection of vavuum pump and vacuum meter 4 is followed by Enter three-way valve;The gas pressure reducer also accesses three-way valve;

The coal sample tank is externally provided with electric heating coil zone of heating;

One end of hand-operated valve one is connected with the three-way valve, and the other end of hand-operated valve one is connected with the coal sample tank;

The negative pressure pressure control module includes pressure surge tank, temperature sensor, data acquisition and display platform, pressure Sensor, magnetic valve, dimension pressure vessel, piston, screw mandrel, man-machine interactive platform and servomotor;Wherein, the pressure surge tank connects Enter to the dimension pressure vessel, the temperature sensor and be linked into pressure surge tank, another interface is linked into parameter acquisition and display Platform;The dimension pressure vessel upper end is provided with three outlets, and an interface of the magnetic valve is linked into dimension pressure vessel, the electromagnetism Another interface emptying of valve;The pressure sensor accesses the dimension pressure vessel;The piston is connected with the screw mandrel and is placed in institute State in dimension pressure vessel, the servomotor drives screw mandrel motion;The collection of pressure sensor data line access parameter and display Platform;

The parameter acquisition includes pressure sensor one, temperature sensor one, magnetic valve one, magnetic valve with control module 2nd, magnetic valve three, magnetic valve four, gas mass flow gauge one, weight flowmeter two and gaseous mass flowmeter three, wherein, One interface of the pressure sensor one and the temperature sensor one accesses the outlet of the coal sample tank by snap joint On, another interface of the pressure sensor one and the temperature sensor one is linked into parameter acquisition and display platform, electromagnetism Valve one is connected with an interface of threeway one, and manually valve two and the coal sample tank go out for another outlet of the threeway one Mouth is connected, and four-way one is connected with threeway one, magnetic valve two, magnetic valve three, magnetic valve four respectively, magnetic valve two and gas mass flow Gauge one is connected in series, and magnetic valve three is connected in series with gas mass flow gauge two, magnetic valve four and gas mass flow gauge three Series connection, gas mass flow gauge one, gas mass flow gauge two, gas mass flow gauge three are respectively connected to four-way two, four-way two, Hand-operated valve, hand-operated valve four are respectively connected to three interfaces of threeway two;Hand-operated valve three is connected with the surge tank, the gas matter Measure flowmeter one, gas mass flow gauge two and gas mass flow gauge three, temperature sensor two, magnetic valve two, magnetic valve three, The equal access parameter collection of data output end of magnetic valve four and display platform.

Further, preferably, the volume of the pressure surge tank is not less than 5L.

Further, preferably, the measurement range of the pressure sensor one and pressure sensor two is respectively -100kPa ~6MPa, -100kPa~2MPa, measurement accuracy are ± 0.3%FS, and resolution ratio is 0.1%FS, and input voltage is 24VDC, output current are 4~20mA, and for operating ambient temperature at -30 DEG C~+50 DEG C, medium temperature is room temperature~100 DEG C, frequency response is not less than 10 times/second.

Further, preferably, the gas mass flow gauge one, gas mass flow gauge two and gaseous mass flowmeter Three measurement range is respectively 0~100ml/min, 0~500ml/min, 0~10000ml/min, and measurement accuracy is ± 1% FS;Pressure voltage is not less than 3MPa;And the requirement of normal use when vacuum reaches 100kPa can be met.

Further, preferably, the temperature sensor one, the measurement range of temperature sensor two are normal temperature -150 ℃;Measurement accuracy is ± 0.1 DEG C;Measurement Resolution is ± 0.1 DEG C;And it can meet normally to make when vacuum reaches 100kPa It is required that.

Further, preferably, the magnetic valve one, the magnetic valve two, magnetic valve three, magnetic valve four and magnetic valve Pressure voltage is 10MPa

The beneficial effects of the present invention are:

(1) subnormal ambient is quickly formed.Negative pressure pressure control module can quickly realize the desorption environment needed for experimentation Negative pressure value and by servomotor stability contorting, is truly realized the stability contorting of negative pressure desorption environmental pressure, for coal sample negative pressure The smooth expansion of environment desorption of mash gas Rule provides safeguard;

(2) measuring accuracy is high.Real-time collection is applied in combination using multiple gas mass flow gauge in the measure of the stripping gas scale of construction Desorption quantity data, realize that the desorption quantity using the second as time of day measures, the human error for avoiding draining water gathering of gas law from operating;

(3) design science, it is theoretical correct, be easy to promote.

Brief description of the drawings

Fig. 1 is a kind of structural representation of coal sample gas negative pressure desorption experiment system of the present invention;

Wherein, 1- high-pressure air sources high-purity methane;2- gas pressure reducers;3- vavuum pumps;4- vacuum meters;5- three-way valves; 6- hand-operated valves one;7- pressure sensors one;8- temperature sensors one;9- hand-operated valves two;10- coal sample tanks;11- electric furnace heating wires heat Circle;12- threeways one;13- magnetic valves one;14- four-ways one;15- magnetic valves two;16- magnetic valves three;17- magnetic valves four;18- gas Weight flowmeter one;19- gas mass flows gauge two;20- gas mass flows gauge three;21- four-ways two;22- threeways two; 23- hand-operated valves three;24- hand-operated valves four;25- surge tanks;26- temperature sensors two;27- parameter acquisitions and display platform;28- is pressed Force snesor two;29- magnetic valves;30- ties up pressure vessel;31- pistons;32- screw mandrels;33- man-machine interactive platforms;34- servomotors.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

As shown in figure 1, the invention provides a kind of coal sample gas negative pressure desorption experiment system, it includes high-pressure air source mould Block, vacuumize module, coal sample tank, negative pressure pressure control module, parameter acquisition and control module;Characterized in that,

Described high-pressure air source module includes high-pressure air source high-purity methane 1, the gas pressure reducer 2 being sequentially connected in series;

The module that vacuumizes includes vavuum pump 3, vacuum meter 4 and three-way valve 5, and the vavuum pump 3 and vacuum meter 4 are connected Three-way valve 5 is accessed afterwards;The gas pressure reducer 2 also accesses three-way valve 5;

The coal sample tank 10 is externally provided with electric heating coil zone of heating 11;

One end of hand-operated valve 1 is connected with the three-way valve 5, the other end of hand-operated valve 1 and the coal sample tank 10 It is connected;

The negative pressure pressure control module includes pressure surge tank 25, temperature sensor 26, data acquisition and display platform 27th, pressure sensor 28, magnetic valve 29, dimension pressure vessel 30, piston 31, screw mandrel 32, man-machine interactive platform 33 and servomotor 34; Wherein, the pressure surge tank 25 is linked into the dimension pressure vessel 30, and the temperature sensor 26 is linked into pressure surge tank 25, Another interface is linked into parameter acquisition and display platform 27;Dimension pressure vessel 30 upper end is provided with three outlets, the electromagnetism One interface of valve 29 is linked into dimension pressure vessel 30, another interface emptying of the magnetic valve 29;The pressure sensor 28 accesses The dimension pressure vessel 30;The piston 31 is connected with the screw mandrel 32 to be placed in the dimension pressure vessel 30, the servomotor 34 Screw mandrel 32 is driven to move;The data wire access parameter of pressure sensor 28 collection and display platform 27;

The parameter acquisition includes pressure sensor 1, temperature sensor 1, magnetic valve 1, electromagnetism with control module Valve 2 15, magnetic valve 3 16, magnetic valve 4 17, gas mass flow gauge 1, weight flowmeter 2 19 and gas mass flow Gauge 3 20, wherein, an interface of the pressure sensor 1 and the temperature sensor 1 is accessed by snap joint In the outlet of the coal sample tank 10, another interface of the pressure sensor 7 one and the temperature sensor 1 is linked into parameter Collection and display platform 27, magnetic valve 1 are connected with an interface of threeway 1, another outlet of the threeway 1 Manually valve 29 is connected with the outlet of the coal sample tank 10, four-way 1 respectively with threeway 1, magnetic valve 2 15, electromagnetism Valve 3 16, magnetic valve 4 17 are connected, and magnetic valve 2 15 is connected in series with gas mass flow gauge 1, magnetic valve 3 16 and gas Mass flowmenter 2 19 is connected in series, and magnetic valve 4 17 is connected with gas mass flow gauge 3 20, gas mass flow gauge 1, Gas mass flow gauge 2 19, gas mass flow gauge 3 20 are respectively connected to four-way 2 21, four-way 2 21, hand-operated valve 23, manually Valve 4 24 is respectively connected to three interfaces of threeway 2 22;Hand-operated valve 3 23 is connected with the surge tank 25, the gaseous mass Flowmeter 1, gas mass flow gauge 2 19 and gas mass flow gauge 3 20, temperature sensor 2 26, magnetic valve 2 15, The equal access parameter collection of magnetic valve 3 16, the data output end of magnetic valve 4 17 and display platform 27.

In the present embodiment, the volume of the pressure surge tank 25 is not less than 5L.The pressure sensor 1 and pressure pass The measurement range of sensor 28 is respectively -100kPa~6MPa, -100kPa~2MPa, and measurement accuracy is ± 0.3%FS, is differentiated Rate is 0.1%FS, and input voltage is 24VDC, and output current is 4~20mA, operating ambient temperature -30 DEG C~+ 50 DEG C, medium temperature is room temperature~100 DEG C, and frequency response is not less than 10 times/second.The gas mass flow gauge 1, gas The measurement range of mass flowmenter 2 19 and gaseous mass flowmeter 3 20 is respectively 0~100ml/min, 0~500ml/min, 0 ~10000ml/min, measurement accuracy are ± 1%FS;Pressure voltage is not less than 3MPa;And it can meet that vacuum reaches 100kPa When normal use requirement.The temperature sensor one, the measurement range of temperature sensor two are -150 DEG C of normal temperature;Measurement essence Degree is ± 0.1 DEG C;Measurement Resolution is ± 0.1 DEG C;And the requirement of normal use when vacuum reaches 100kPa can be met. The magnetic valve 1, the magnetic valve 2 15, magnetic valve 3 16, the pressure voltage of magnetic valve 4 17 and magnetic valve 29 are 10MPa。

The key that the present invention is different from existing particulate coal desorption of mash gas rule is the quick formation of subnormal ambient.The present invention Operation principle be:

1. check air-tightness.System finishes referring to the drawings connection and checks air-tightness.

2. default desorption Environmental Negative-pressure.The appropriate coal sample of loading in coal sample tank 10, swivel tee valve 5, makes to vacuumize mould Block accesses and cutoff high gas source module;Open vavuum pump 3 and hand-operated valve 1, hand-operated valve 29, magnetic valve 2 15, magnetic valve three 16th, magnetic valve 4 17, magnetic valve 1, magnetic valve 29 are closed;Afterwards, then system is vacuumized, shows pressure sensor one For a certain default negative pressure value P when (when target negative pressure value P0 is -40kPa, -50kPa, -60kPa, P=P0-30;Target negative pressure When value P0 is -30kPa, -20kPa, P=P0-20;When target negative pressure value P0 is -30kPa, -20kPa, P=P0-10) close electricity Magnet valve two, magnetic valve three, magnetic valve four continue that remaining path is carried out to be evacuated to -100kPa;

3. system desorption Environmental Negative-pressure is formed.Its pressure is set to be preset negative by the constant voltage mode of negative pressure pressure control module Pressure value P;After vacuumizing, swivel tee valve 5, cut-out vacuumizes module and accesses high-pressure air source module;Open pressure-reducing valve Adsorption equilibrium is carried out to coal sample in coal sample tank 10;After adsorption equilibrium, swivel tee valve simultaneously closes manually-operated gate 1, makes to take out very Empty module and high-pressure air source are connected with system shutdown;Keep magnetic valve 2 15, magnetic valve 3 16, magnetic valve 4 17 to close, open Rapid closing magnetic valve 1 and open magnetic valve 4 17 when magnetic valve 1 to the registration of pressure sensor 7 is 0, start negative pressure pressure The constant pressure module of power control module and when system environments negative pressure reaches desired value, quick change is permanent on man-machine interactive platform 33 Die block preset pressure value P=P0-5kPa, make the both sides environment rapid pressure balance of magnetic valve 4 17, due to pressure surge tank 25 And the dimension volume of pressure vessel 30, form desorption of mash gas gas at initial stage for atmosphere gas initial in coal sample tank and subnormal ambient and provide Enough surge volumes, while formed for quick negative pressure and maintain to provide safeguard.

4. the maintenance of system subnormal ambient.By step 3. after, as gas constantly desorbs in coal sample tank, particulate coal watt This desorption rate is constantly decayed over time, should according to flowmeter registration with this open gas mass flow gauge 2 19, Gas mass flow gauge 3 20, while keep two other mass flowmenter to close;Setting value according to man-machine interactive platform 33 Give servomotor 34 to instruct, promoting screw mandrel 32, the motion in dimension pressure vessel 30 adjusts what is brought by desorption of mash gas with piston 31 The fluctuation of system negative pressure value.

Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (4)

1. a kind of coal sample gas negative pressure desorption experiment system, it includes high-pressure air source module, vacuumizes module, coal sample tank, negative pressure Pressure control module, parameter acquisition and control module;Characterized in that,
Described high-pressure air source module includes high-pressure air source high-purity methane, the gas pressure reducer being sequentially connected in series;
The module that vacuumizes includes vavuum pump, vacuum meter and three-way valve, and three are accessed after vavuum pump and the vacuum meter series connection Port valve door;The gas pressure reducer also accesses three-way valve;
The coal sample tank is externally provided with electric heating coil zone of heating;
One end of hand-operated valve one is connected with the three-way valve, and the other end of hand-operated valve one is connected with the coal sample tank;It is described Negative pressure pressure control module includes pressure surge tank, temperature sensor, data acquisition and display platform, pressure sensor, electromagnetism Valve, dimension pressure vessel, piston, screw mandrel, man-machine interactive platform and servomotor;Wherein, the pressure surge tank is linked into the dimension Pressure vessel, the temperature sensor are linked into pressure surge tank, and another interface of temperature sensor is linked into parameter acquisition with showing Show platform;The dimension pressure vessel upper end is provided with three outlets, and an interface of the magnetic valve is linked into dimension pressure vessel, the electricity Another interface emptying of magnet valve;The pressure sensor accesses the dimension pressure vessel;The piston is connected with the screw mandrel and is placed in In the dimension pressure vessel, the servomotor drives screw mandrel motion;The pressure sensor data line access parameter collection is with showing Show platform;
The parameter acquisition includes pressure sensor one, temperature sensor one, magnetic valve one, magnetic valve two, electricity with control module Magnet valve three, magnetic valve four, gas mass flow gauge one, weight flowmeter two and gaseous mass flowmeter three, wherein, the pressure One interface of force snesor one and the temperature sensor one is accessed by snap joint in the outlet of the coal sample tank, described Another interface of pressure sensor one and the temperature sensor one is linked into parameter acquisition and display platform, magnetic valve one and three Logical one interface is connected, and manually valve two is connected with the outlet of the coal sample tank for another outlet of the threeway one, Four-way one is connected with threeway one, magnetic valve two, magnetic valve three, magnetic valve four respectively, magnetic valve two and gas mass flow gauge one It is connected in series, magnetic valve three is connected in series with gas mass flow gauge two, and magnetic valve four is connected with gas mass flow gauge three, gas Weight flowmeter one, gas mass flow gauge two, gas mass flow gauge three are respectively connected to four-way two, four-way two, hand-operated valve, Hand-operated valve four is respectively connected to three interfaces of threeway two;Hand-operated valve three is connected with the surge tank, the gas mass flow Meter one, gas mass flow gauge two and gas mass flow gauge three, temperature sensor two, magnetic valve two, magnetic valve three, magnetic valve The four equal access parameter collection of data output end and display platform;The measurement model of the temperature sensor one, temperature sensor two It is -150 DEG C of normal temperature to enclose;Measurement accuracy is ± 0.1 DEG C;Measurement Resolution is ± 0.1 DEG C;And it can meet that vacuum reaches The requirement of normal use during 100kPa;The magnetic valve one, the magnetic valve two, magnetic valve three, magnetic valve four and magnetic valve Pressure voltage is 10MPa.
A kind of 2. coal sample gas negative pressure desorption experiment system according to claim 1, it is characterised in that the pressure buffer The volume of tank is not less than 5L.
A kind of 3. coal sample gas negative pressure desorption experiment system according to claim 1, it is characterised in that the pressure sensing The measurement range of device one and pressure sensor is respectively -100kPa~6MPa, -100kPa~2MPa, and measurement accuracy is ± 0.3%FS, resolution ratio are 0.1%FS, and input voltage is 24VDC, and output current is 4~20mA, operating ambient temperature At -30 DEG C~+50 DEG C, medium temperature is room temperature~100 DEG C, and frequency response is not less than 10 times/second.
A kind of 4. coal sample gas negative pressure desorption experiment system according to claim 1, it is characterised in that the gaseous mass The measurement range of flowmeter one, gas mass flow gauge two and gaseous mass flowmeter three be respectively 0~100ml/min, 0~ 500ml/min, 0~10000ml/min, measurement accuracy are ± 1%FS;Pressure voltage is not less than 3MPa;And vacuum can be met The requirement of normal use when degree reaches 100kPa.
CN201610014944.3A 2016-01-08 2016-01-08 A kind of coal sample gas negative pressure desorption experiment system CN105510176B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105974082B (en) * 2016-06-12 2018-01-19 河南理工大学 A kind of Overpressure Condition coal containing methane gas gas constant pressure desorption analog detection method and device
CN106093338A (en) * 2016-07-13 2016-11-09 煤科集团沈阳研究院有限公司 Down-hole reacting cycle sampling desorption of mash gas process simulation test device and method of testing
CN107132084A (en) * 2017-06-21 2017-09-05 西南石油大学 A kind of metering of rock core stripping gas and collection device
CN107478559B (en) * 2017-07-26 2020-11-24 太原理工大学 Device and method for simulating migration of gas in coal samples with different particle sizes
AT520239B1 (en) * 2017-08-01 2019-04-15 Grabner Instr Messtechnik Gmbh Method for measuring the vapor pressure of liquid and solid substances
CN108717033A (en) * 2018-05-14 2018-10-30 华北科技学院 A kind of experimental provision and experimental method improving coal gas desorption efficiency using magnetic-particle
CN108918336B (en) * 2018-07-22 2020-12-04 中煤科工集团重庆研究院有限公司 Full-automatic gas desorption index and drill chip quantity rapid measuring device
CN110196205A (en) * 2019-05-30 2019-09-03 中国矿业大学 The measurement device and method of gas diffusion through coal particles attenuation characteristic

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102928570A (en) * 2012-10-24 2013-02-13 河南理工大学 Sealing device for gas-containing coal sample used under triaxial compression experiment conditions
CN102928272A (en) * 2012-10-24 2013-02-13 河南理工大学 Briquette coal sample making tool and method
CN103760064A (en) * 2014-01-23 2014-04-30 平顶山天安煤业股份有限公司 Coal sample gas adsorption and desorption experiment device and method under variable pressure condition
CN103776659A (en) * 2013-12-31 2014-05-07 河南理工大学 Negative-pressure draw-out type coal layer gas content spot sampling method
CN103926105A (en) * 2014-03-03 2014-07-16 河南理工大学 Drilling negative-pressure slagging coal seam spot sampling experimental system
CN104535455A (en) * 2015-01-07 2015-04-22 河南理工大学 Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes
CN205374217U (en) * 2016-01-08 2016-07-06 河南理工大学 Coal sample gas negative pressure desorption experimental system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102928570A (en) * 2012-10-24 2013-02-13 河南理工大学 Sealing device for gas-containing coal sample used under triaxial compression experiment conditions
CN102928272A (en) * 2012-10-24 2013-02-13 河南理工大学 Briquette coal sample making tool and method
CN103776659A (en) * 2013-12-31 2014-05-07 河南理工大学 Negative-pressure draw-out type coal layer gas content spot sampling method
CN103760064A (en) * 2014-01-23 2014-04-30 平顶山天安煤业股份有限公司 Coal sample gas adsorption and desorption experiment device and method under variable pressure condition
CN103926105A (en) * 2014-03-03 2014-07-16 河南理工大学 Drilling negative-pressure slagging coal seam spot sampling experimental system
CN104535455A (en) * 2015-01-07 2015-04-22 河南理工大学 Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes
CN205374217U (en) * 2016-01-08 2016-07-06 河南理工大学 Coal sample gas negative pressure desorption experimental system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
负压环境下煤的瓦斯解吸规律试验研究;张洪良 等;《河南理工大学学报(自然科学版)》;20111231;第30卷(第6期);第634-637、641页 *

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