CN205670151U - A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device - Google Patents
A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device Download PDFInfo
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- CN205670151U CN205670151U CN201620558395.1U CN201620558395U CN205670151U CN 205670151 U CN205670151 U CN 205670151U CN 201620558395 U CN201620558395 U CN 201620558395U CN 205670151 U CN205670151 U CN 205670151U
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Abstract
This utility model belongs to technical field of mine safety, relates to a kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device.Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device includes the coal sample tank being positioned at ultrathermostat, coal sample tank is connected with degassing unit, methane inflation unit and constant voltage desorption unit, coal sample tank is placed coal sample and reaches adsorption equilibrium by degassing and methane inflation, under ultrathermostat and constant voltage desorption unit effect, carry out constant temperature and pressure desorbing, and collect data according to Overpressure Condition coal containing methane gas gas constant voltage desorbing analog detection method.This utility model can the superpressure desorbing of accurate simulation fire damp, desorption of mash gas mechanism when preferably seeing clearly coal seam location of the coring procedure and gas pumping, for improving survey desorption method location of the coring procedure coal core leakage gas amount and calculate that the gas pumping ability prediction of reliability and Gas pre-drainage boring provides research means and technological approaches, improve the prediction of mine gas degree of danger and the specific aim of gas control.
Description
Technical field
This utility model belongs to technical field of mine safety, relates to a kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing mould
Intend test device.
Background technology
China is the country that coal production is maximum in the world, is also the state that coal mine gas problem is the most serious in the world simultaneously
One of family.In Gas Disaster preventing and treating, coal seam gas-bearing capacity is the basis calculating gas reserves with gas emission, is also forecasting coal
One of important parameter with gas outburst risk, the accuracy of gas bearing capacity measured value not only governs mine gas degree of danger
Forecasting reliability, and affect effectiveness and the warp of the Firedamp precaution measures formulated so that gas degree of danger is predicted as according to
Ji property, in some instances it may even be possible to jeopardize mine safety production.
Coal seam gas-bearing capacity assay method surveys desorption method and the big class of down-hole desorption method two according to range of application with being divided into.Survey
Desorption method measures coal seam gas-bearing capacity by location of the coring procedure coal core leakage gas amount, ground desorbing firedamp testing amount and residual gas amount
Constitute.The computational methods that wherein location of the coring procedure coal sample leakage gas amount is the most frequently used are the coal sample desorption of mash gas amount on ground and desorbing
The Q-relation followed between time calculates formula；Owing to the desorption of mash gas in location of the coring procedure coal core is at mud medium or aqueous medium
In complete, mud pressure is much larger than atmospheric pressure, and therefore, coal core gas misses the gas belonged in mud under Overpressure Condition
Desorbing；And the desorption of mash gas that coal sample is on ground is carried out in air dielectric, both pressure medium condition differences are relatively big, use
It is irrational that the coal sample normal pressure desorption of mash gas rule reckoning on ground puies forward the method for the coal sample leakage gas amount during brill, is
Cause surveying the main cause that desorption method gas bearing capacity measured value poor stability accuracy rate is on the low side existingly.
During coal bed gas extraction, the gas pressure in borehole circumference coal seam is along with they adding to the distance holed
Increasing greatly, there is pressure differential between the coal body of different distance, under the effect of pressure differential, gas can be by distant place coal body to nearby
Coal body flows；When coal gas pressure superatmospheric power nearby, the mistake that the gas in coal body flows to coal body nearby at a distance
Journey belongs to Overpressure Condition and gushes out.Therefore, the gas pumping amount that Accurate Prediction is holed, coal body to be studied at ambient pressure watt
This adsorption law, coal body to be studied is in the desorption of mash gas rule of Overpressure Condition.At present, coal body gas solution under Overpressure Condition
Inhale feature and rarely have research with rule, be urgently to be resolved hurrily studying a question.
Therefore, the reliability that desorption method location of the coring procedure coal core gas wastage calculates, and Accurate Prediction in order to improve are surveyed
The gas pumping ability of extraction borehole, it is necessary to coal containing methane gas desorption of mash gas feature under Overpressure Condition is ground with rule
Studying carefully, see clearly the Desorption Mechanism under the different condition of coal seam further, the safety in production for colliery provides safeguard.
Utility model content
The purpose of this utility model is to design a kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device,
For improving survey desorption method location of the coring procedure coal core leakage gas amount and calculate reliability and the gas pumping ability of Gas pre-drainage boring
Prediction provides research means and technological approaches.
The technical solution adopted in the utility model is as follows:
A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device, is filled by coal sample tank, degassing unit, methane
Gas unit and constant voltage desorption unit four part composition；The coal sample tank 17 of sealing of tank cover is positioned at thermostat 18, the tank of coal sample tank 17
Having covered two interfaces, one of them interface connects the first Pressure gauge 16, and another interface connects constant voltage by the first pipeline 15
Desorption unit, the first pipeline 15 arranges four-way and connection the second pipeline 13 and the 3rd pipeline 19, and the second pipeline 13 connects degassing
Unit, the 3rd pipeline 19 connects methane inflation unit, described constant voltage desorption unit include with first pipeline 15 connect airtight
Cavity 10, the desorption of mash gas instrument 26 connected with the 4th pipeline 25 and the nitrogen inflation list connected with airtight cavity 10 top side interface
Unit, described first pipeline 15 and the 4th pipeline 25 are connected by the flexible rubber hose 8 of one section of 5-10cm inside airtight cavity 10.
Further, described degassing unit is connected by pipeline vacuum pump the 11, first valve 12, compound vacuum gauge 27 groups
Becoming, compound vacuum gauge 27 is positioned on the first valve 12 and the tank connected pipeline of coal sample.
Further, it is characterised in that described methane inflation unit is by the second valve being sequentially connected with by the 3rd pipeline 19
Door 20, reference tank the 21, second Pressure gauge the 22, the 3rd valve 23, methane gasing tank 24 form.
Further, described nitrogen inflation unit is sequentially connected with nitrogen gasing tank the 1, the 5th valve the 4, the 3rd by by pipeline
Pressure gauge 5, surge tank the 3, the 5th valve 4 form.
A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing analog detection method, is carried out as follows:
(S1) coal sample preparation and process: after coal sample is pulverized, be sieved into the coal sample of certain particle diameter, be divided into many parts of equivalent,
Put into dried in drying baker；
(S2) vacuum outgas: the dry coal sample handled well is loaded desorption experiment tank, with degassing unit to coal sample tank 60
At DEG C, vacuum outgas to 10 below Pa；
(S3) adsorption equilibrium: according to required adsorption equilibrium pressure, is filled with a certain amount of methane, after balance upon adsorption, and note
Record the first Pressure gauge 16 actual adsorption equilibrium pressure P1；
(S4) constant voltage desorbing: according to pressure needs, by nitrogen inflation unit be filled with in airtight cavity appropriate nitrogen with
Adjust pressure in airtight cavity so that it is reach predetermined pressure P2, make P2Equal to P1, in coal sample tank, coal containing methane gas gas starts desorbing,
When the pressure in coal sample tank is more than P2Time, flexible rubber hose opens, and the gas desorbed, after pipeline is discharged, passes through desorption apparatus
Measuring coal seams gas discharging quantity, in coal sample tank, gas pressure drop is low, when the pressure in coal sample tank is less than or equal to P2Time, in flexible rubber hose
Again closed by ambient pressure difference effect outward；
(S5) data analysis: repeat (S3), (S4) experimentation, arranges different analog temperature, different adsorption equilibrium pressure
Under coal containing methane gas gas adsorption desorption process, collect desorption data analyze experimental result.
Advantage of the present utility model be that can the superpressure desorbing of accurate simulation fire damp, for improving survey desorption method
Location of the coring procedure coal core leakage gas amount calculates that the gas pumping ability prediction of reliability and Gas pre-drainage boring provides research means
And technological approaches, improve the prediction of mine gas degree of danger and the specific aim of gas control.
Accompanying drawing explanation
Fig. 1 is Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device structure chart of the present utility model signal
Figure.
Detailed description of the invention
As it is shown in figure 1, be a kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device of the present utility model,
Need before using device detect the air-tightness of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device and close all
Valve；
Putting into dried coal sample in coal sample tank 1, the temperature of regulation ultrathermostat to 30 DEG C and is incubated to coal sample tank
Middle temperature constant, opens vacuum pump the 11, first valve 12 and valve 29, coal sample tank 17 is carried out vacuum outgas, compound vacuum gauge
27 display pressure when being down to below 10Pa, close the first valve 12,29 and vacuum pump 11, complete coal sample tank and connected pipeline
Degassing processes；Open the 3rd valve 23, in reference to tank 21, be filled with methane by methane gasing tank 24, close the 3rd valve 23 also
Record the second Pressure gauge 22 pressure P0(i.e. with reference to tank 21 pressure), opens the second valve 20 and valve 29, fills in coal sample tank 17
Entering methane gas, close valve the 2nd 20 and valve 29, coal sample adsorption equilibrium is not until the first Pressure gauge 16 reading is being changed to
Only, the numerical value of record display, i.e. adsorption equilibrium pressure is P1；
Water 9 is added so that the water added just submerged length is the flexible rubber hose 8 of 5cm, opens the 6th in airtight cavity
Valve 2, is filled with a certain amount of nitrogen by nitrogen gasing tank 1 to surge tank 3, opens the 5th valve 4 He after closing the 6th valve 2
4th valve 6, is passed through nitrogen in airtight cavity 10 so that the force value of the 3rd Pressure gauge 5 display and the pressure of adsorption equilibrium
Value P1Identical, open valve 7 and 14, when the pressure in coal sample tank is more than adsorption equilibrium pressure value P1Time, the flexible rubber hose in cavity is opened
Opening, the gas desorbed can enter desorption of mash gas instrument 26 by flexible rubber hose, completes the desorbing test under constant-pressure conditions；
Overpressure Condition coal containing methane gas gas constant voltage desorbing analog detection method, utilizes above-mentioned Overpressure Condition coal containing methane gas gas
Constant voltage desorbing simulating test device, is carried out in accordance with the following steps:
(S1) coal sample preparation and process: after coal sample is pulverized, be sieved into the coal sample of certain particle diameter, be divided into many parts of equivalent,
Put into dried in drying baker；
(S2) vacuum outgas: the dry coal sample handled well is loaded desorption experiment tank, with degassing unit to coal sample tank 30
DEG C, vacuum outgas to 10 below Pa；
(S3) adsorption equilibrium: according to required adsorption equilibrium pressure, is filled with a certain amount of methane, after balance upon adsorption, and note
Record the first Pressure gauge 16 actual adsorption equilibrium pressure P1；
(S4) constant voltage desorbing: according to pressure needs, by nitrogen inflation unit be filled with in airtight cavity appropriate nitrogen with
Adjust pressure in airtight cavity so that it is reach predetermined pressure P2, make P2Equal to P1, in coal sample tank, coal containing methane gas gas starts desorbing,
When the pressure in coal sample tank is more than P2Time, flexible rubber hose opens, and the gas desorbed, after pipeline is discharged, passes through desorption apparatus
Measuring coal seams gas discharging quantity, in coal sample tank, gas pressure drop is low, when the pressure in coal sample tank is less than or equal to P2Time, in flexible rubber hose
Again closed by ambient pressure difference effect outward；
(S5) data analysis: repeat (S3), (S4) experimentation, arranges different analog temperature, different adsorption equilibrium pressure
Under coal containing methane gas gas adsorption desorption process, collect desorption data analyze experimental result.
Claims (4)
1. an Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device, it is characterised in that by coal sample tank, degassing list
Unit, methane inflation unit and constant voltage desorption unit four part composition；The coal sample tank (17) of sealing of tank cover is positioned at thermostat (18),
Having two interfaces on the cover of coal sample tank (17), one of them interface connects the first Pressure gauge (16), and another interface is by the
One pipeline (15) connects constant voltage desorption unit, and the first pipeline (15) arranges four-way and connection the second pipeline (13) and the 3rd pipeline
(19), the second pipeline (13) connects degassing unit, and the 3rd pipeline (19) connects methane inflation unit, described constant voltage desorption unit
Including the airtight cavity (10) connected with the first pipeline (15), the desorption of mash gas instrument (26) connected with the 4th pipeline (25) and with close
Closing the nitrogen inflation unit that cavity (10) top side interface connects, described first pipeline (15) and the 4th pipeline (25) are in closed chamber
Body (10) is internal to be connected by the flexible rubber hose (8) of one section of 5-10cm.
Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device the most according to claim 1, it is characterised in that
Vacuum pump (11) that described degassing unit is connected by the second pipeline (13), the first valve (12), compound vacuum gauge (27) form,
Compound vacuum gauge (27) is positioned on the pipeline that the first valve (12) is connected with coal sample tank (17).
Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device the most according to claim 1, it is characterised in that
Described methane inflation unit is by the second valve (20) being sequentially connected with by the 3rd pipeline (19), with reference to tank (21), the second pressure
Power table (22), the 3rd valve (23), methane gasing tank (24) form.
Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device the most according to claim 1, it is characterised in that
Described nitrogen inflation unit is sequentially connected with the 4th valve (6), the 3rd Pressure gauge (5), the 5th valve by by the 5th pipeline (28)
Door (4), surge tank (3), the 6th valve (2), nitrogen gasing tank (1) composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620558395.1U CN205670151U (en) | 2016-06-12 | 2016-06-12 | A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620558395.1U CN205670151U (en) | 2016-06-12 | 2016-06-12 | A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device |
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| CN205670151U true CN205670151U (en) | 2016-11-02 |
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| CN201620558395.1U Withdrawn - After Issue CN205670151U (en) | 2016-06-12 | 2016-06-12 | A kind of Overpressure Condition coal containing methane gas gas constant voltage desorbing simulating test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192794A (en) * | 2017-06-15 | 2017-09-22 | 河南理工大学 | A kind of device of underground coal mine CO sources identification |
| CN109632569A (en) * | 2019-01-24 | 2019-04-16 | 中煤科工集团重庆研究院有限公司 | The measuring method and device of a kind of adscititious gases and moisture to coal containing methane gas grain desorption effects |
| CN114965150A (en) * | 2022-04-14 | 2022-08-30 | 安徽理工大学 | Method for testing gas and dust treatment effect of coal seam water injection in linkage manner |
| CN114965150B (en) * | 2022-04-14 | 2024-04-16 | 安徽理工大学 | Method for testing coal seam water injection gas and dust control effect in linkage mode |
-
2016
- 2016-06-12 CN CN201620558395.1U patent/CN205670151U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192794A (en) * | 2017-06-15 | 2017-09-22 | 河南理工大学 | A kind of device of underground coal mine CO sources identification |
| CN107192794B (en) * | 2017-06-15 | 2020-06-19 | 河南理工大学 | Device for identifying underground CO source of coal mine |
| CN109632569A (en) * | 2019-01-24 | 2019-04-16 | 中煤科工集团重庆研究院有限公司 | The measuring method and device of a kind of adscititious gases and moisture to coal containing methane gas grain desorption effects |
| CN114965150A (en) * | 2022-04-14 | 2022-08-30 | 安徽理工大学 | Method for testing gas and dust treatment effect of coal seam water injection in linkage manner |
| CN114965150B (en) * | 2022-04-14 | 2024-04-16 | 安徽理工大学 | Method for testing coal seam water injection gas and dust control effect in linkage mode |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161102 Effective date of abandoning: 20180119 |