CN107063918A - A kind of accurate adjustable coal grain adsorption-desorption rule of parameter determines device and method - Google Patents
A kind of accurate adjustable coal grain adsorption-desorption rule of parameter determines device and method Download PDFInfo
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- CN107063918A CN107063918A CN201611234210.2A CN201611234210A CN107063918A CN 107063918 A CN107063918 A CN 107063918A CN 201611234210 A CN201611234210 A CN 201611234210A CN 107063918 A CN107063918 A CN 107063918A
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- 239000003245 coal Substances 0.000 title claims abstract description 193
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000002336 sorption--desorption measurement Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 153
- 238000012545 processing Methods 0.000 claims abstract description 44
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 230000008054 signal transmission Effects 0.000 claims abstract description 3
- 238000001179 sorption measurement Methods 0.000 claims description 65
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 40
- 238000003795 desorption Methods 0.000 claims description 30
- 238000009792 diffusion process Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 15
- 238000013480 data collection Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000006004 Quartz sand Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000003463 adsorbent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000002817 coal dust Substances 0.000 claims description 2
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000036760 body temperature Effects 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
Abstract
Device and method is determined the present invention relates to a kind of accurate adjustable coal grain adsorption-desorption rule of parameter, belongs to mineral engineering, safety engineering scientific research technical field.Device part mainly includes referring to tank, and the reference tank is used to accommodate gases at high pressure；With coal sample tank of the reference tank by pipeline connection, the coal sample tank is used to accommodate coal sample of the absorption with reference to tank mesohigh gas；With aerometer measuring tank of the coal sample tank by pipeline connection, the aerometer measuring tank is used to accommodate the gas in coal sample tank；Wherein, for connect with reference to tank and the pipeline of coal sample tank be separately installed with magnetic valve on the pipeline for connecting coal sample tank and gas measuring tank；Pressure inside the reference tank, coal sample tank and gas measuring tank by with each self-corresponding pressure sensor monitoring, pressure signal transmission to control cabinet, control cabinet transmit signals to data processing unit by pressure sensor.The present apparatus structure brand-new by designing, realizes the measure of coal-bed gas adsorption-desorption rule under different occurrence conditions.
Description
Technical field
It is to be related to a kind of parameter accurately may be used specifically the present invention relates to mineral engineering, safety engineering scientific research technical field
The coal grain adsorption-desorption rule of tune determines device and method.
Background technology
Increasingly increase with country to resource requirement, resource exploitation intensity is continued to increase, coal and gas prominent accident by
Gradually turn into the major casualty accident that influence safety of coal mines situation persistently takes a turn for the better.In gas outburst risk prediction preventing and treating, utilize
Gas bearing capacity method of the coal to gas adsorption rule and the method for drilling index using desorption of mash gas rule serve vital
Effect.
In addition, the gas adsorption adsorption law of coal is studied and grasps, for Gas Content Prediction in Coal Seam, coal bed gas extraction
And adopt coal breakage Gas estimation etc. suffer from great theory directive significance.
However, due to coal grain gas adsorption, the diversity of desorption condition, complexity, problem is not satisfactorily resolved yet, such as
The gas adsorption adsorption law what determines and grasped under specific environment is to solve one of current unavoidable problem of coal production.
At present, for coal grain gas adsorption/adsorption law, substantial amounts of research work has been carried out, have developed a series of surveys
Determine device, present situation is as follows：
(1) Chinese patent of Application No. 201610112973.3 discloses a kind of multifunctional coal adsorption/desorption gas ginseng
Number determination test device and methods, experimental rig include gas cylinder, plenum chamber, particulate coal adsorption chamber, lumped coal adsorption chamber,
Data collecting instrument and computer, can measure the adsorbance of different-grain diameter coal body, adsorbance, deflection and its relation of lumped coal
And coal body absorption constant.But the device is in the measurement process of above-mentioned parameter, adsorption equilibrium pressure only can be flat in coal sample absorption
Read after weighing apparatus, it is impossible to accurate in advance to set.
(2) Chinese patent of Application No. 201520565699.6 discloses a kind of gases at high pressure absorption automatic measurement dress
Put, the device includes controller, display, main line, adsorption tanks, temperature bath, multiple gas cylinders and aspirating pipeline etc., can be complete
Under exactly the same experiment condition, adsorption experiment of the adsorbent of the same race to different Adsorbate Gas is automatically performed.But the device can not
Realize the automatic accurate control of adsorption equilibrium pressure.
(3) Chinese patent of Application No. 201010586189.9 discloses a kind of method and dress for measuring adsorption capacities of materials
Put, the device can once realize the measurement of multiple sample adsorbances, while can also be adsorbed to many component mixed gas
The measurement of amount.But the measurement device method is obtained by the gas pressure value before and after gas absorption, and according to the equation of gas state
Go out adsorbance of each sample to gas, adsorption equilibrium pressure can not be pre-set.
(4) 201510907742.7 Chinese patent of Application No. discloses a kind of coal grain specific diffuse and desorbed under pressure
Rule determines device and assay method, and the device can realize real-time, the Accurate Determining to desorption of mash gas amount, can effectively eliminate free
Gas measures fixed influence to desorption of mash gas, and providing stable high pressure for coal grain desorption of mash gas diffuses condition.But the device is desorbed
Diffusing the regulation of pressure needs to realize that adjustable extent is small by regulation relief valve screw, and precision is low, complex operation.
(5)《Safety of coal mines》" the WT-2000 types that 7 phases of volume 36 in July, 2007 are delivered by Cao's Yao woods, Fu Xiang, Jiang Qinghua
Disclosed in the development of Methane Diffusion speed determinator and its application in Huainan Mining Area " (page 19~22) text in Section 2
WT-2000 type Methane Diffusion speed determinators, the device utilizes advanced computer, pressure sensor, industrial monitoring technology, can
Realize the Methane Diffusion amount diffused under High Pressure Absorption to space under normal pressure, diffuse the continuous monitoring of speed.But the device is only capable of reality
Existing normal pressure diffuses condition, and diffusing pressure can not be adjusted.
(6)《Liaoning Project Technology University's journal (natural science edition)》5 phases of volume 31 in October, 2012 are by Qin Yueping, king
In " level pressure dynamic desorption of mash gas Rule " (page 581~585) text that strong, Luo Wei, Wang Yaru are delivered disclosed in Section 2
Coal grain gas desorption experiment device, the device is mainly adopted by air-breather, temperature control system, isothermal adsorption system and data
Collection is constituted with the part of processing system four, can realize the Methane Diffusion amount real-time testing under the conditions of constant temperature level pressure.But the device is only
It can realize that normal pressure diffuses condition, diffusing pressure can not be adjusted.
The adsorption/desorption rule of the above-mentioned unit of comprehensive analysis determines device, also has the following disadvantages：
1. said apparatus function is more single, it is only capable of determining absorption or the desorption properties of gas, it is impossible to realize gas absorption
Measured while Desorption characteristics；
During 2. said apparatus is determined to gas sorption characteristics, adsorption equilibrium pressure is both needed to after adsorption equilibrium by pressure gauge
Reading is determined, it is impossible to realize presetting and accurately controlling for adsorption equilibrium pressure；
3. said apparatus is in gas desorption characteristic measurement, majority diffuses condition for normal pressure, and few counting apparatus can be realized
Desorption of mash gas rule under the conditions of high pressure is diffused is determined, and diffuses that pressure adjustable scope is small, precision is low, is adjusted cumbersome, it is impossible to real
Now diffuse the regulation with a wide range of precise of pressure.
For the gas adsorption adsorption law for preferably determining and grasping different adsorption equilibrium pressure, diffuse under pressure, need
Develop a kind of accurate adjustable coal grain adsorption-desorption rule of parameter and determine device and assay method, so as to more accurate, efficient
Regulation coal sample gas adsorption balance pressure, diffuse pressure, more true simulation coal seam adsorption-desorption environmental condition.
The content of the invention
The purpose of the present invention is that there is provided a kind of accurate adjustable coal grain absorption of parameter to overcome above-mentioned the deficiencies in the prior art
Adsorption law determines device.The present apparatus structure brand-new by designing, realizes coal-bed gas adsorption-desorption under different occurrence conditions
The measure of rule.
In order to reach above-mentioned purpose, the present invention is adopted the following technical scheme that：
A kind of accurate adjustable coal grain adsorption-desorption rule of parameter determines device, including：
With reference to tank, the reference tank is used to accommodate gases at high pressure；
With coal sample tank of the reference tank by pipeline connection, the coal sample tank is used to accommodate absorption with reference to tank mesohigh gas
The coal sample of body；
With aerometer measuring tank of the coal sample tank by pipeline connection, the aerometer measuring tank, which is used to accommodate, comes from coal sample tank
In gas；
Wherein,
Distinguish for connecting with reference to tank with the pipeline of coal sample tank with the pipeline for connecting coal sample tank and gas measuring tank
Magnetic valve is installed；
Pressure inside the reference tank, coal sample tank and gas measuring tank by with each self-corresponding pressure sensor monitoring,
Pressure signal transmission to control cabinet, control cabinet are transmitted signals to data processing unit by pressure sensor.
Pass through control action of the control cabinet to electromagnetism valve opening, it is possible to achieve flat is adsorbed to coal sample tank in coal sample adsorption process
Coal sample tank diffuses pressure and accurately automatically control in real time in weighing apparatus pressure, coal sample desorption process.
Data processing unit coordinates with control cabinet can realize that gas flow is gathered and adsorption equilibrium in real time in each tank body
Pressure and the accurate control for diffusing pressure, and then realize that the adsorbance of the grain gas of the coal under any adsorption equilibrium pressure is determined and appointed
It is fixed that the coal grain Methane Diffusion that meaning is diffused under pressure is measured.
It is preferred that, it is dipped in reference to tank, coal sample tank and gas measuring tank in constant water bath box, three tank bodies can be achieved in examination
Temperature is constant during testing.
It is preferred that, it is also equipped with pneumatic filter on the pipeline with reference to tank and coal sample tank for connecting.
It is preferred that, the pipeline for connecting coal sample tank and gas measuring tank is provided with pneumatic filter；To prevent coal in tank
The precision component that powder enters in device with gas.
It is preferred that, it is carbon steel material tank body with reference to tank, coal sample tank and gas measuring tank, can pressure-resistant 32MPa.
Pressure sensor is respectively arranged in reference to tank, coal sample tank, gas dosing tank top, with reference to data processing unit to each
The pressure of individual tank body carries out real-time precise acquisition, and real-time gas in tank can be extrapolated according to The Ideal-Gas Equation (pv=nRT)
The scale of construction.The adsorbance of coal grain gas is can obtain according to the gas flow change with reference to tank before and after coal sample adsorption equilibrium；According to gas
Gas quantifies in body measuring tank, you can obtain the coal grain Methane Diffusion in the case of being influenceed under corresponding experimental condition by free gas
Amount, can be with by determining same volume under same test conditions, same particle size not adsorbent (such as quartz sand) Methane Diffusion amount
Free gas influence is excluded, it is final to obtain coal grain Methane Diffusion amount.
While said structure scheme is provided, present invention also offers a kind of method of utilization said apparatus, main report
Following steps：
(1) system initialization；Each pressure sensor, magnetic valve and the equal Access Control case pair of computer for carrying out parameter acquisition
Interface is answered, checks whether pressure sensor is good for use, and each pressure sensor is normal using parameter acquisition data processing unit
In the case of can continue experiment；
(2) airtight test；Measuring tank gas outlet valve is closed, vavuum pump, gas cylinder successively connection coal sample tank are entered
Gas port valve, the airtight test under negative pressure, high pressure is carried out to package unit；
(3) after airtight sexual satisfaction requirement, weigh certain mass coal sample and load coal sample tank, overlying absorbent cotton, by package unit
It is put into water bath with thermostatic control, determining device to the whole series afterwards carries out Fruit storage；
(4) with reference to canister incoming gas mouthful connection gas cylinder, to being filled with gases at high pressure with reference to tank, close afterwards with reference to canister incoming gas mouthful
Valve, is obtained with reference to pressure tank p after pressure is steady by data processing unitc1；
(5) coal sample adsorption equilibrium pressure p is set by data processing unit1, started by control cabinet opens solenoid valve and inhaled
Coal sample starts absorption with reference to gas in tank in attached process, coal sample tank, control cabinet according to coal sample pressure tank control in real time with reference to tank with
Electromagnetism valve opening between coal sample tank, to keep coal sample pressure inside the tank p1It is stable, until p1No longer change, now data processing list
First automatic data collection is to reference to pressure tank pc2；
(6) pressure p is diffused by data processing unit setting2And acquisition time t, desorption process is started by control cabinet,
Desorption gas starts to diffuse to aerometer measuring tank in coal sample tank, and control cabinet controls coal sample tank and gas in real time according to coal sample pressure tank
Electromagnetism valve opening between measuring tank, to keep coal sample pressure inside the tank p2It is stable；Data processing unit gathers gas in real time automatically
Pressure inside the tank is measured, until reaching setting time t, the process of diffusing terminates；
(7) coal sample in coal sample tank is changed into the not adsorbent (such as quartz sand) of same volume, same particle size, repeat step
(6) when, diffusing time t up to reaching, real-time pressure in data processing unit automatic data collection aerometer measuring tank；
(8) determine and finish, device inner high voltage gas is discharged, the quartz sand in coal sample tank is taken out, and make proper arrangements dress
Put and auxiliary equipment.
In the above method, it is preferred that according to the reference tank measured in step (4) and step (5) in coal grain adsorption equilibrium
Front and rear pressure pc1、pc2, according to The Ideal-Gas Equation：Pv=nRT；It can obtain adsorption equilibrium pressure of the coal sample in setting
Power p1Lower adsorbance n1；
Wherein p is gas pressure intensity in tank, and v is gas volume in tank, and n is the amount of gaseous matter in tank, and R is that common gas is normal
Amount, T is absolute temperature.
In the above method, it is preferred that the gas dosing pressure inside the tank measured according to step (6), you can obtain coal sample and exist
Diffuse pressure p2Lower coal grain Methane Diffusion amount and free gas amount of diffusin sum.
Real-time pressure in the aerometer measuring tank measured according to step (7), you can obtain diffusing pressure p2Lower free gas is put
Dissipate amount.
In the above method, it is preferred that coal grain Methane Diffusion amount and the free gas amount of diffusin sum for obtaining step (6)
The free gas amount of diffusin obtained with step (7) makees poor, you can obtains coal sample and is diffusing pressure p2Lower coal grain desorption of mash gas amount.
In the present invention, the The Ideal-Gas Equation related to gas variable quantity is：Pv=nRT, wherein p are gas in tank
Pressure, v is gas volume in tank, and n is the amount of gaseous matter in tank, and R is universal gas constant, and T is absolute temperature.
The concrete principle of the present invention is to set adsorption equilibrium pressure p by data processing unit before experiment1, diffuse pressure
p2, during adsorption test, data processing unit gathers each tank body pressure by pressure sensor, and compares coal sample tank pressure in real time
Power p and adsorption equilibrium pressure set points p1Magnitude relationship；
As p ＜ p1When, data processing unit is opened by control cabinet control with reference to magnetic valve between tank and coal sample tank, reference
Tank inner high voltage gas is supplemented gas in coal sample tank, until p=p1, data processing unit controls the electromagnetism by control cabinet
Valve is closed, so that adsorption equilibrium pressure stability is in setting value p1；
During desorption experiment, data processing unit gathers each tank body pressure by pressure sensor, and compares coal in real time
Sample pressure tank p is with diffusing setting value p2Magnitude relationship, as p ＞ p2When, data processing unit controls coal sample tank gentle by control cabinet
Magnetic valve is opened between body measuring tank, and coal sample tank gas enters aerometer measuring tank, until p=p2, data processing unit, which passes through, to be controlled
Case processed controls the closed electromagnetic valve, so that setting value p can be stabilized to by diffusing pressure2。
Described pressure sensor is high-precision pressure sensor, and precision is high, and frequency acquisition is high.
Described magnetic valve is the carbon steel bidirectional electromagnetic valve suitable for gas, and flow is big, and the response time is short.
Described control cabinet is the integrated products of control unit of electromagnetic valve and pressure sensor analog input card, signal stabilization.
Described data processing unit is set up by voltage signal with the control cabinet and contacted, and can be based on pressure sensor
The tank body pressure collected, compares the magnitude relationship between coal sample pressure tank and setting value in real time, controls electromagnetism valve opening.
Employ after said structure, the present invention can be realized to coal sample gas adsorption amount, the accurate measure of desorption quantity simultaneously, and
Can with accuracy controlling adsorption equilibrium pressure, diffuse pressure, provide stable, adjustable adsorption-desorption environment for coal sample Methane Diffusion,
Simultaneously have automaticity it is high, it is easy to operate the characteristics of.
Beneficial effects of the present invention：
1. the achievable adsorption equilibrium pressure of the present invention, the accurate control for diffusing pressure, then realize any adsorption equilibrium pressure
The adsorption law that Adsorption law under power determined and arbitrarily diffused under pressure is determined.
2. the present invention can meet the measure of coal sample Adsorption and desorption rule simultaneously, realize coal sample once adsorb, Duo Gecan
The purpose that number is determined, improves test efficiency, has saved test period.
3. the present invention is done using the not adsorbent with coal sample same volume, same particle size and diffuses survey under the same terms
Examination, by contrast, can effectively eliminate free gas volume, cover the state of the depositing influence fixed to desorption of mash gas measurement.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Wherein, 1. tank, 2. coal sample tanks, 3. aerometer measuring tanks, 4. pneumatic filters, 5. constant water bath box, 6. pressure are referred to
Sensor, 7. magnetic valves, 8. control cabinets, 9. data processing units.
Embodiment：
As shown in Figure 1：A kind of accurate adjustable coal grain adsorption-desorption rule of parameter determines device, and the device mainly includes inhaling
Attached desorption system, temperature control system, acquisition control system.
Adsorption-desorption system is mainly included with reference to tank 1, coal sample tank 2, aerometer measuring tank 3, pneumatic filter 4, is coal sample watt
The main space place of this Adsorption and desorption, three tank bodies pass through closed pipeline connection respectively.
It is used to be adsorbed by coal sample in coal sample tank 2 with reference to the inner high voltage gas of tank 1, realizes coal sample gas adsorption function；Coal sample tank 2
Coal sample desorption gas after interior adsorption saturation enters aerometer measuring tank 3, realizes the desorption function of coal sample gas.
The air inlet of coal sample tank 2, gas outlet connect pneumatic filter 4 respectively, to prevent that coal dust enters device with gas in tank
In precision component.
3 pressure sensors 6 are respectively arranged in reference to tank 1, coal sample tank 2, the top of aerometer measuring tank 3, with reference to data processing
Unit 9 carries out real-time precise acquisition to the pressure of each tank body, and gas flow in tank can be extrapolated according to The Ideal-Gas Equation.
It is carbon steel material tank body with reference to tank 1, coal sample tank 2, aerometer measuring tank 3, can pressure-resistant 32MPa.
Temperature control system mainly includes constant water bath box 5, and constant water bath box 5 can will refer to tank 1, coal sample tank 2, gas
Measuring tank 3 is completely immersed in thermostatted water, realizes that the temperature of process of the test is constant.
Acquisition control system mainly includes pressure sensor 6, magnetic valve 7, control cabinet 8, data processing unit 9, Ke Yishi
Show the real-time collection of gas flow in each tank body and adsorption equilibrium pressure and diffuse the accurate control of pressure, and then realize any suction
It is fixed that the coal grain Methane Diffusion that the adsorbance of coal grain gas under attached balance pressure is determined and arbitrarily diffused under pressure is measured.
The adsorbance of coal grain gas is can obtain according to the gas flow change with reference to tank 1 before and after coal sample adsorption equilibrium.
Changed over time according to gas flow in aerometer measuring tank 3, you can obtain under corresponding experimental condition by free gas shadow
Coal grain Methane Diffusion amount in the case of sound.
By determining same volume under same test conditions, same particle size not adsorbent (such as quartz sand) Methane Diffusion
Amount, can exclude free gas influence, final to obtain coal grain Methane Diffusion amount.
Magnetic valve 7 is respectively arranged in reference between tank 1 and coal sample tank 2, between coal sample tank 2 and gas measuring tank 3, binding number
Collection according to processing unit 9 and pressure sensor 6 to pressure inside the tank, by control action of the control cabinet 8 to the aperture of magnetic valve 7,
It can realize that pressure is diffused to coal sample tank in coal sample tank adsorption equilibrium pressure, coal sample desorption process in coal sample adsorption process carries out essence
True automatically controls.Its concrete principle is with process：
Adsorption equilibrium pressure p is set by data processing unit 9 before experiment1, diffuse pressure p2。
During adsorption test, data processing unit gathers each tank body pressure by pressure sensor 6, and compares coal in real time
Sample pressure tank p and adsorption equilibrium pressure set points p1Magnitude relationship, as p ＜ p1When, data processing unit 9 is controlled by control cabinet 8
Open, gas in coal sample tank 2 is supplemented with reference to magnetic valve 7 between tank 1 and coal sample tank 2 with reference to the inner high voltage gas of tank 1, until
P=p1, data processing unit 9 controls the magnetic valve 7 to close by control cabinet 8, so that adsorption equilibrium pressure stability is in setting
Value p1。
In the present invention, the The Ideal-Gas Equation related to gas variable quantity is：Pv=nRT, wherein p are gas in tank
Pressure, v is gas volume in tank, and n is the amount of gaseous matter in tank, and R is universal gas constant, and T is absolute temperature.
For example, when being measured to gas adsorption amount, gas cylinder will be connected with reference to the air inlet of tank 1, to being filled with reference to tank 1
Gases at high pressure, close the air inlet valve with reference to tank 1, pass through pressure sensor 6 and data processing list after pressure is steady afterwards
Member 9 obtains the pressure p with reference to tank 1c1；By pc1Bring formula pv=nRT into, draw the amount n with reference to the gaseous matter in tankc1。
Then, coal sample adsorption equilibrium pressure p is set by data processing unit 91, open with reference between tank 1 and coal sample tank 2
Magnetic valve 7, start adsorption process.Coal sample starts absorption with reference to gas in tank 1, the collection coal of data processing unit 9 in coal sample tank 2
The pressure of sample tank 2, control is with reference to the aperture of magnetic valve 7 between tank and coal sample tank in real time, to keep pressure stability in coal sample tank 2,
Until reaching adsorption equilibrium, now the automatic data collection of data processing unit 9 refers to the pressure p of tank 1c2；
By pc2Bring formula pv=nRT into, draw the amount n with reference to the gaseous matter in tank 1c2；
Again by p1Bring formula pv=nRT into, draw the amount n of the gaseous matter in coal sample tank 21；
Then adsorption equilibrium pressure p of the coal sample in setting1Lower adsorbance np1=nc1-nc2-n1。
During desorption experiment, data processing unit 9 gathers each tank body pressure by pressure sensor 6, and compares in real time
The pressure p of coal sample tank 2 is with diffusing setting value p2Magnitude relationship, as p ＞ p2When, data processing unit 9 controls coal sample by control cabinet 8
Magnetic valve 7 is opened between tank 2 and gas measuring tank 3, and the gas of coal sample tank 2 enters aerometer measuring tank 3, until p=p2, then data
Processing unit 9 controls the magnetic valve 7 between coal sample tank 2 and aerometer measuring tank 3 to close by control cabinet 8, so that in coal sample tank 2
Pressure stability in setting value p2。
Meanwhile, real-time pressure p in the automatic data collection aerometer measuring tank 3 of data processing unit 93, until setting time t is reached,
The process of diffusing terminates.
By p3Bring formula pv=nRT into, a Methane Diffusion amount that must produce coal and free gas amount of diffusin sum n3。
Next, the coal sample in coal sample tank 2 to be replaced into the material of not adsorption gas, such as quartz sand.Then it will take out
The coal sample tank 2 of vacuum is installed in test device, and the pressure in coal sample tank 2 is enlarged into p again1。
Magnetic valve 7 between second of unlatching coal sample tank 2 and gas measuring tank 3, data processing unit 9 is according to coal sample tank 2
Pressure controls the aperture of magnetic valve 7 between coal sample tank 2 and aerometer measuring tank 3 in real time, to keep the pressure that diffuses of coal sample tank 2 to reduce
To p2When coal sample tank 2 and gas measuring tank 3 between magnetic valve 7 close.Meanwhile, the automatic data collection aerometer of data processing unit 9
Real-time pressure p in measuring tank 34, until reaching setting time t, the process of diffusing terminates.
By p4Bring formula pv=nRT into, draw free gas amount of diffusin n4。
Then coal sample is diffusing pressure p2Lower coal grain desorption of mash gas amount n5=n3-n4。
A little being for special instruction is needed, during desorption experiment, pressure p when being pressurizeed twice to coal sample tank 2 should
It is identical.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to embodiment will be apparent for those skilled in the art, as defined herein general
Principle can be realized in other embodiments without departing from the spirit or scope of the present invention, is not described in detail
The part presented with partial enlargement, is prior art, herein without repeating.Therefore, the present invention is not intended to be limited to herein
These shown embodiments, and it is to fit to the most wide scope consistent with feature with principles disclosed herein.
Claims (10)
1. a kind of accurate adjustable coal grain adsorption-desorption rule of parameter determines device, it is characterised in that including：
With reference to tank, the reference tank is used to accommodate gases at high pressure；
With coal sample tank of the reference tank by pipeline connection, the coal sample tank is used to accommodate absorption with reference to tank mesohigh gas
Coal sample；
With aerometer measuring tank of the coal sample tank by pipeline connection, the aerometer measuring tank is used to accommodate in coal sample tank
Gas；
Wherein,
For connect with reference to tank and the pipeline of coal sample tank be respectively mounted on the pipeline for connecting coal sample tank and gas measuring tank
There is magnetic valve；
Pressure inside the reference tank, coal sample tank and gas measuring tank by with each self-corresponding pressure sensor monitoring, pressure
Pressure signal transmission to control cabinet, control cabinet are transmitted signals to data processing unit by sensor.
2. coal according to claim 1 grain adsorption-desorption rule determines device, it is characterised in that with reference to tank, coal sample tank and
Aerometer measuring tank is dipped in constant water bath box, three tank body temperature in process of the test can be achieved constant.
3. coal according to claim 1 grain adsorption-desorption rule determines device, it is characterised in that for connecting with reference to tank and
Pneumatic filter is also equipped with the pipeline of coal sample tank.
4. coal according to claim 1 grain adsorption-desorption rule determines device, it is characterised in that for connect coal sample tank and
The pipeline of aerometer measuring tank is provided with pneumatic filter；To prevent precision component that coal dust in tank enters in device with gas.
5. coal according to claim 1 grain adsorption-desorption rule determines device, it is characterised in that with reference to tank, coal sample tank and
Aerometer measuring tank is carbon steel material tank body.
6. the method that the coal grain adsorption-desorption rule described in a kind of utilization claim any one of 1-5 determines device, its feature exists
In step is as follows：
(1) system initialization；
(2) airtight test；
(3) weigh certain mass coal sample and load coal sample tank, determining device to the whole series carries out Fruit storage；
(4) with reference to canister incoming gas mouthful connection gas cylinder, to being filled with gases at high pressure with reference to tank, close afterwards with reference to canister incoming gas mouthful valve
Door, is obtained with reference to pressure tank p after pressure is steady by data processing unitc1；
(5) coal sample adsorption equilibrium pressure p is set1, coal sample in adsorption process, coal sample tank is started by control cabinet opens solenoid valve and opened
Absorption begin with reference to gas in tank, control cabinet controls to open with reference to the magnetic valve between tank and coal sample tank in real time according to coal sample pressure tank
Degree, to keep coal sample pressure inside the tank p1It is stable, until p1No longer change, now data processing unit automatic data collection is to reference to tank pressure
Power pc2；
(6) pressure p is diffused by data processing unit setting2And acquisition time t, desorption process, coal sample tank are started by control cabinet
Interior desorption gas starts to diffuse to aerometer measuring tank, and control cabinet controls coal sample tank and aerometer measuring tank in real time according to coal sample pressure tank
Between electromagnetism valve opening, to keep coal sample pressure inside the tank p2It is stable；Data processing unit gathers aerometer measuring tank in real time automatically
Interior pressure, until reaching setting time t, the process of diffusing terminates；
(7) coal sample in coal sample tank is changed into the not adsorbent of same volume, same particle size, repeat step (6), put until reaching
When dissipating time t, real-time pressure in data processing unit automatic data collection aerometer measuring tank；
(8) determine finish, by device inner high voltage gas discharge, by coal sample tank quartz sand take out, and make proper arrangements device and
Auxiliary equipment.
7. method according to claim 6, it is characterised in that exist according to the reference tank measured in step (4) and step (5)
Pressure p before and after coal grain adsorption equilibriumc1、pc2, according to The Ideal-Gas Equation：Pv=nRT；Coal sample be can obtain in setting
Adsorption equilibrium pressure p1Lower adsorbance n1；
Wherein p is gas pressure intensity in tank, and v is gas volume in tank, and n is the amount of gaseous matter in tank, and R is universal gas constant, T
For absolute temperature.
8. method according to claim 6, it is characterised in that the gas dosing pressure inside the tank measured according to step (6), i.e.,
It can obtain coal sample and diffusing pressure p2Lower coal grain Methane Diffusion amount and free gas amount of diffusin sum.
9. method according to claim 8, it is characterised in that pressed in real time in the aerometer measuring tank measured according to step (7)
Power, you can obtain diffusing pressure p2Free Methane Diffusion amount down.
10. method according to claim 9, it is characterised in that the coal grain Methane Diffusion amount for obtaining step (6) is with dissociating
Methane Diffusion amount sum makees poor with the free gas amount of diffusin that step (7) is obtained, you can obtains coal sample and is diffusing pressure p2Lower coal
Grain desorption of mash gas amount.
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