CN201965070U - Gas desorption experiment device under external liquid invasion condition - Google Patents
Gas desorption experiment device under external liquid invasion condition Download PDFInfo
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- CN201965070U CN201965070U CN2011200464099U CN201120046409U CN201965070U CN 201965070 U CN201965070 U CN 201965070U CN 2011200464099 U CN2011200464099 U CN 2011200464099U CN 201120046409 U CN201120046409 U CN 201120046409U CN 201965070 U CN201965070 U CN 201965070U
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Abstract
The utility model provides a gas desorption experiment device under an external liquid invasion condition, which relates to the gas desorption experiment device aiming at the problem that the existing gas desorption experiment device under the external liquid invasion condition can not realize the desorption at the pressure. A vacuum pump is communicated with a left end opening of a high-pressure connecting hose, the high-pressure connecting hose is respectively communicated with a reference cylinder and a sample cylinder, a built-in external liquid linkage device is arranged in the sample cylinder, a gas cylinder is communicated with the high-pressure connecting hose through a pipeline, a first control valve, a second control valve, a third control valve and a fourth control valve are arranged on the high-pressure connecting hose, a fifth control valve is arranged on the pipeline, a coal sample bottle is arranged at the bottom inside a casing, a uniform distribution disperser is arranged at the upper part of the coal sample bottle and is fixedly connected into the casing, a liquid filling cylinder is arranged on the uniform distribution dispenser and is fixedly connected with the casing, the bottom of the liquid filling cylinder is provided with at least one liquid outlet, and a steel ball is arranged on the at least one liquid outlet. The gas desorption experiment device under the external liquid invasion condition is used for the gas desorption experiment under the external liquid invasion condition.
Description
Technical field
The utility model relates to a kind of desorption of mash gas experimental provision.
Background technology
Along with to the deepening continuously of mine gas gas studies, people are progressively changed the resource exploitation utilization into by traditional single diaster prevention and control object to the understanding of gas and are come up.In recent years, scholars have realized that the importance of desorption of mash gas research, and the corresponding gas adsorption and desorption mechanism of having carried out, and the experimental study of mutual relationship aspect between the same pressure of gas adsorption-desorption, temperature, moisture, coal particle granularity, gas composition, and obtained the certain phase achievement.
Gas itself is a kind of unconventional rock gas, and with the exploitation circle rule of a widespread consensus is arranged in gas prospecting, promptly " has water then not have gas ", that is to say in the subterranean formation zone of being explored then should just not have gas in the zone if there is runoff water.The ultimate principle that this rule hinted is that water has metathesis to gas on adsorbent (coal) surface on adsorption potential, and current actions with under gas is had the displacement effect, this gives us a kind of enlightenment undoubtedly, promptly contain for the gas reservoir for original, in certain mode of employing extraneous water or certain liquid are invaded under the condition of coal body by force, this external liquid will certainly produce displacement and displacement effect to the gas in the coal body, and this can have positive role to gas pumping undoubtedly to a certain extent.
In order to explore external liquid to the desorb facilitation that gas had in the coal containing methane gas body, need be by the checking that experimentizes of pertinent instruments equipment, just be based on above idea, the author has carried out the research and development design first with regard to its experimental provision, in the hope of offering help for the gas pumping fundamental research.
Suitable experiment condition is to guarantee to obtain reliable experimental result and the prerequisite and the guarantee of experiment conclusion rationally.Current the experimental apparatus that is adopted mainly contains two classes in gas adsorption-desorption experimental study field, and a class is ready-made instrument and equipment, promptly utilizes the existing instrument and equipment mensuration that experimentizes; Another kind of is the experimental facilities of researching and developing voluntarily, and promptly experimental needs are the contrived experiment instrument voluntarily, with this mensuration that experimentizes.No matter adopt which kind of equipment, its most basic prerequisite is to satisfy the needs of experimental study.
Common ready-made gas adsorption-desorption instrument mainly contains following several:
1) IS-100 type gas isothermal adsorption-desorption instrument.This instrument is produced by U.S. Terra Tek company, it not only can realize the conventional isothermal adsorption-desorption experiment of gas, but also can be by the artificial pressure that reduces in the experiment cylinder of adjusting, and in sample cylinder, inject other gas and compete position absorption, then by the gas sample after the collection different pressures point adsorption-desorption balance, come the variation of analytical gas component, carry out gas with this and put the gas experiment.
2) ASAP specific surface area measuring instrument.This instrument is mainly used in parametric measurements such as material hole size, total pore volume and surface area, heat of adsorption, pore volume, and principle of work is the static capacity method of isothermal physisorption.But utilize the desorb situation after this instrument indirect determination gas absorption.
3) AST-1000 coal-seam gas isothermal adsorption-desorption emulation experiment instrument.
4) WY-98B type absorption constant analyzer.This instrument only can be measured absorption constant a and the b value of coal to methane by the development of coal academy of sciences Fushun branch.
For above-mentioned instrument, substantially all are the experimental studies that are used for gas absorption aspect, and for the research of desorption of mash gas aspect, then be to be based upon on the basis of gas adsorption and desorption completely reversibility, come the backstepping desorb with absorption, because the gas adsorption and desorption whether dispute on by reversible the existence, therefore can not think definitely that still it is exactly scientific and reasonable replacing desorption experiment fully with adsorption experiment always.And from the existing desorption of mash gas device of design voluntarily, its desorption process all is that to be subordinate to environmental baseline be normal pressure or do not have desorption process under the press strip spare, can't simulate in the gas pumping process in the coal containing methane gas band of gas and press desorption process (residing environment has certain gas pressure).
In addition, from current experiments equipment and device, all can't be used to study the desorption process of its gas under the original coal containing methane gas body liquid intrusion outside condition, what the end that invades that promptly can't be used for outer liquid has influence the experimental study of aspect to the original desorption of mash gas that contains the coal body of gas.
The utility model content
The purpose of this utility model provides desorption of mash gas experimental provision under a kind of outer liquid intrusion condition, and the desorption of mash gas experimental provision can't be with the problem of pressing desorb under the present outer liquid intrusion condition to solve.
The utility model is to solve the problems of the technologies described above the technical scheme of taking to be: desorption of mash gas experimental provision under the described outer liquid intrusion condition, described experimental provision comprises vacuum pump, high pressure connects flexible pipe, first operation valve, second operation valve, the 3rd operation valve, the 4th operation valve, the 5th operation valve, with reference to cylinder, sample cylinder, gas cylinder and pipeline, described experimental provision also comprises first tensimeter, second tensimeter and built-in outer liquid linkage, vacuum pump is connected flexible pipe with high pressure left port is communicated with, high pressure connects flexible pipe and is communicated with reference cylinder and sample cylinder respectively, built-in outer liquid linkage is arranged in the sample cylinder, high pressure connects flexible pipe and is provided with first operation valve, second operation valve, the 3rd operation valve and the 4th operation valve, first operation valve is between the vacuum pump and first tensimeter, second operation valve is between first tensimeter and second tensimeter, the 3rd operation valve is between second operation valve and second tensimeter, the 4th operation valve is connected between the right output port of flexible pipe at second tensimeter with high pressure, pipeline is provided with the 5th operation valve, gas cylinder is connected soft pipe connection by pipeline with high pressure, and the endpiece of pipeline is between second operation valve and the 3rd operation valve, be provided with first tensimeter that is used for the witness mark in-cylinder pressure with reference to cylinder, sample cylinder is provided with second tensimeter that is used for the measuring samples in-cylinder pressure, built-in outer liquid linkage is by the dress fluid cylinder, equispaced disperser, at least one steel ball, housing and coal sample bottle constitute, the coal sample bottle is located at the bottom in the housing, top and equispaced disperser that equispaced disperser is located at the coal sample bottle are fixed in the housing, the dress fluid cylinder be located on the equispaced disperser and dress fluid cylinder and housing affixed, the bottom of dress fluid cylinder is provided with at least one liquid outlet, at least one liquid outlet is provided with steel ball, and the quantity of steel ball is consistent with the quantity of liquid outlet.
Be provided with built-in outer liquid linkage in the utility model, simulated the residing primal environment condition of coal containing methane gas, can carry out band pressure desorption experiment under the outer liquid intrusion condition, the utility model still can be done the desorption of mash gas experiment under conventional gas adsorption-desorption experiment and the condition of normal pressure simultaneously, the utility model not only can provide essential condition for the Basic Experiment Study in desorption of mash gas field, but also the high-efficiency mining research that promotes China's gas resources is had certain positive role.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model, and Fig. 2 is the structural representation of built-in outer liquid linkage.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, desorption of mash gas experimental provision under the outer liquid intrusion condition of present embodiment, described experimental provision comprises vacuum pump 1, high pressure connects flexible pipe 2, first operation valve 3, second operation valve 4, the 3rd operation valve 5, the 4th operation valve 6, the 5th operation valve 7, with reference to cylinder 10, sample cylinder 11, gas cylinder 13 and pipeline 14, described experimental provision also comprises first tensimeter 8, second tensimeter 9 and built-in outer liquid linkage 12, vacuum pump 1 is connected flexible pipe 2 with high pressure left port is communicated with, high pressure connects flexible pipe 2 and is communicated with reference cylinder 10 and sample cylinder 11 respectively, built-in outer liquid linkage 12 is arranged in the sample cylinder 11, high pressure connects flexible pipe 2 and is provided with first operation valve 3, second operation valve 4, the 3rd operation valve 5 and the 4th operation valve 6, first operation valve 3 is between the vacuum pump 1 and first tensimeter 8, second operation valve 4 is between first tensimeter 8 and second tensimeter 9, the 3rd operation valve 5 is between second operation valve 4 and second tensimeter 9, the 4th operation valve 6 is connected between the right output port of flexible pipe 2 at second tensimeter 9 with high pressure, pipeline 14 is provided with the 5th operation valve 7, gas cylinder 13 is connected flexible pipe 2 by pipeline 14 and is communicated with high pressure, and the endpiece of pipeline 14 is between second operation valve 4 and the 3rd operation valve 5, be provided with first tensimeter 8 that is used for witness mark cylinder 10 internal pressures with reference to cylinder 10, sample cylinder 11 is provided with second tensimeter 9 that is used for measuring samples cylinder 11 internal pressures, built-in outer liquid linkage 12 is by dress fluid cylinder 12-1, equispaced disperser 12-2, at least one steel ball 12-3, housing 12-4 and coal sample bottle 12-5 constitute, coal sample bottle 12-5 is located at the bottom in the housing 12-4, top and equispaced disperser 12-2 that equispaced disperser 12-2 is located at coal sample bottle 12-5 are fixed in the housing 12-4, dress fluid cylinder 12-1 be located at that equispaced disperser 12-2 goes up and dress fluid cylinder 12-1 and housing 12-4 affixed, the bottom of dress fluid cylinder 12-1 is provided with at least one liquid outlet 12-6, at least one liquid outlet 12-6 is provided with steel ball 12-3, and the quantity of steel ball 12-3 is consistent with the quantity of liquid outlet 12-6.
Embodiment two: in conjunction with Fig. 1 present embodiment is described, the bottom of the equispaced disperser 12-2 of present embodiment is laid with one group of dispersion hole 12-7, and this structure can evenly be spilt outer liquid.Other compositions and annexation are identical with embodiment one.
Principle of work: utilize the utility model to carry out the desorption of mash gas rule experimental study of coal containing methane gas body under the outer liquid intrusion condition, its basic experiment operating process is as follows:
1) at first prepare the coal sample of certain particle size, and the coal sample that need therefrom take out certain mass by experiment as laboratory sample with standby, dispose certain density outer liquid simultaneously with stand-by, outer liquid can be water, also can be to have certain density certain solution.
2) outer liquid is put into dress fluid cylinder 12-1, the coal sample coal sample bottle 12-5 that packs into, whole built-in outer liquid linkage 12 is inserted in the sample cylinder 11, check the impermeability of total system, test with assurance and carry out in confined conditions.
3) with reference to the experimentation of coal high pressure isothermal adsorption experiment (GB/T19560-2008) mesohigh volumetric method, carry out vacuum outgas by 1 pair in vacuum pump with reference to cylinder 10 and sample cylinder 11 and (open first operation valve 3, second operation valve 4, the 3rd operation valve 5 and the 4th operation valve 6 this moment, the 5th operation valve 7 is closed), then inject helium and ask the entity volume of coal sample in the survey coal sample bottle 12-5 and the volume (close first operation valve 3, second operation valve 4, the 3rd operation valve 5 and the 4th operation valve 6 this moment, opens the 5th operation valve 7) of free space.
4) carry out vacuum outgas once more, then inject methane to certain pressure p
c, make sample cylinder 11 interior gas absorption reach equilibrium state through 24h, the pressure after the balance is designated as p
0
5) with angle of sample cylinder 11 inclinations, make the steel ball 12-3 of built-in outer liquid linkage 12 break away from liquid outlet 12-6, outer liquid in the dress fluid cylinder 12-1 evenly is sprinkled upon on the coal sample force value p when writing down different time points respectively by the tensimeter on the sample cylinder 11 then by equispaced disperser 12-2
i, and be calculated as follows the desorption of mash gas amount of coal sample when different time points.
In the formula, Δ m is the gas amount that the unit mass coal is desorbed, cm
3/ g; V
mThe molar volume of-methane gas, 22.4 * 10
3Cm
3/ mol; M is the quality of coal sample, g; V is the volume of free space in the sample cylinder, cm
3R is a gas law constant, R=8.314J/mol.K; T is an experimental temperature, K; Z
i, Z
0Be respectively P
iAnd P
0Pairing methane gas compressibility factor during pressure.
Whole desorption time after the above step-down continues 24h.
6) draw desorption of mash gas amount and time curve and carry out interpretation.
Because the gas under the condition that does not have outer liquid to invade in the coal containing methane gas is in the adsorption equilibrium state, so the gas pressure in the sample cylinder 11 is bound to remain constant.When outer liquid is invaded, because outer liquid molecule and methane gas molecule carry out the competition of adsorption potential on the coal surface, if this moment, sample cylinder 11 interior pressure remained unchanged, show that the methane gas molecule has overwhelming superiority when competing position absorption, outer liquid does not exert an influence to desorption of mash gas.Otherwise, if the increased pressure in the sample cylinder 11, show that then outer liquid molecule has overwhelming superiority when the competitive Adsorption position, to produce metathesis to the gas molecule that was in adsorbed state originally, and then having promoted the desorb of adsorption gas, desorption of mash gas amount and time curve that this rule will be passed through to be drawn directly reflect.
Claims (2)
1. desorption of mash gas experimental provision under the outer liquid intrusion condition, described experimental provision comprises vacuum pump (1), high pressure connects flexible pipe (2), first operation valve (3), second operation valve (4), the 3rd operation valve (5), the 4th operation valve (6), the 5th operation valve (7), with reference to cylinder (10), sample cylinder (11), gas cylinder (13) and pipeline (14), it is characterized in that described experimental provision also comprises first tensimeter (8), second tensimeter (9) and built-in outer liquid linkage (12), vacuum pump (1) is connected flexible pipe (2) with high pressure left port is communicated with, high pressure connects flexible pipe (2) and is communicated with reference cylinder (10) and sample cylinder (11) respectively, built-in outer liquid linkage (12) is arranged in the sample cylinder (11), high pressure connects flexible pipe (2) and is provided with first operation valve (3), second operation valve (4), the 3rd operation valve (5) and the 4th operation valve (6), first operation valve (3) is positioned between vacuum pump (1) and first tensimeter (8), second operation valve (4) is positioned between first tensimeter (8) and second tensimeter (9), the 3rd operation valve (5) is positioned between second operation valve (4) and second tensimeter (9), the 4th operation valve (6) is positioned at second tensimeter (9) and is connected between the right output port of flexible pipe (2) with high pressure, pipeline (14) is provided with the 5th operation valve (7), gas cylinder (13) is connected flexible pipe (2) by pipeline (14) and is communicated with high pressure, and the endpiece of pipeline (14) is positioned between second operation valve (4) and the 3rd operation valve (5), be provided with first tensimeter (8) that is used for witness mark cylinder (10) internal pressure with reference to cylinder (10), sample cylinder (11) is provided with second tensimeter (9) that is used for measuring samples cylinder (11) internal pressure, built-in outer liquid linkage (12) is by dress fluid cylinder (12-1), equispaced disperser (12-2), at least one steel ball (12-3), housing (12-4) and coal sample bottle (12-5) constitute, coal sample bottle (12-5) is located at the bottom in the housing (12-4), top and equispaced disperser (12-2) that equispaced disperser (12-2) is located at coal sample bottle (12-5) are fixed in the housing (12-4), dress fluid cylinder (12-1) is located at that equispaced disperser (12-2) is gone up and dress fluid cylinder (12-1) is affixed with housing (12-4), the bottom of dress fluid cylinder (12-1) is provided with at least one liquid outlet (12-6), at least one liquid outlet (12-6) is provided with steel ball (12-3), and the quantity of steel ball (12-3) is consistent with the quantity of liquid outlet (12-6).
2. according to desorption of mash gas experimental provision under the described outer liquid intrusion condition of claim 1, it is characterized in that the bottom of described equispaced disperser (12-2) is laid with one group of dispersion hole (12-7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200464099U CN201965070U (en) | 2011-02-23 | 2011-02-23 | Gas desorption experiment device under external liquid invasion condition |
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| CN2011200464099U CN201965070U (en) | 2011-02-23 | 2011-02-23 | Gas desorption experiment device under external liquid invasion condition |
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| CN201965070U true CN201965070U (en) | 2011-09-07 |
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| CN104502224A (en) * | 2014-08-14 | 2015-04-08 | 中国石油大学(华东) | Device and method for determination of coal rock isothermal desorption curve under saturated water condition |
| CN105021493A (en) * | 2015-07-13 | 2015-11-04 | 中国石油大学(华东) | Absorption-desorption method of multicomponent gases and device thereof |
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- 2011-02-23 CN CN2011200464099U patent/CN201965070U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103335916A (en) * | 2013-06-04 | 2013-10-02 | 河南理工大学 | Experiment device for initial laws of tectonic coal gas desorption |
| CN104502224A (en) * | 2014-08-14 | 2015-04-08 | 中国石油大学(华东) | Device and method for determination of coal rock isothermal desorption curve under saturated water condition |
| CN104502224B (en) * | 2014-08-14 | 2016-04-20 | 中国石油大学(华东) | Saturation water Coal Under rock isothermal desorption curve determination device and method |
| CN105021493A (en) * | 2015-07-13 | 2015-11-04 | 中国石油大学(华东) | Absorption-desorption method of multicomponent gases and device thereof |
| CN105021493B (en) * | 2015-07-13 | 2017-11-28 | 中国石油大学(华东) | A kind of absorption analysis method and device of multicomponent gas |
| CN107345890A (en) * | 2016-05-06 | 2017-11-14 | 中国石油化工股份有限公司 | A kind of shale gas adsorption-desorption/exploitation simulated experiment apparatus and method |
| CN107345890B (en) * | 2016-05-06 | 2020-03-20 | 中国石油化工股份有限公司 | Shale gas adsorption desorption/exploitation simulation experiment device and method |
| CN106896208A (en) * | 2017-03-29 | 2017-06-27 | 西安科技大学 | A kind of quantitative additional water system inhibitor device of high pressure |
| CN108732061A (en) * | 2017-04-17 | 2018-11-02 | 中国石油化工股份有限公司 | Stripping gas and free gas recognition methods in a kind of shale gas output gas |
| CN108732061B (en) * | 2017-04-17 | 2020-05-22 | 中国石油化工股份有限公司 | Method for identifying desorbed gas and free gas in shale gas output gas |
| CN108756991A (en) * | 2018-08-10 | 2018-11-06 | 辽宁工程技术大学 | A kind of coal seam note CO2Replace the system and method for displacement gas |
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Granted publication date: 20110907 Termination date: 20120223 |