CN109870400A - A kind of isothermal adsorption device and test method changing gas density - Google Patents
A kind of isothermal adsorption device and test method changing gas density Download PDFInfo
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- CN109870400A CN109870400A CN201910263358.6A CN201910263358A CN109870400A CN 109870400 A CN109870400 A CN 109870400A CN 201910263358 A CN201910263358 A CN 201910263358A CN 109870400 A CN109870400 A CN 109870400A
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Abstract
The invention discloses a kind of isothermal adsorption devices for changing gas density, it includes: mixed gas feed system, and the mixed gas feed system and gas mixer (7) pass through piping connection；Gas mixer (7) and survey gas density mixing tank (11) pass through piping connection；It surveys gas density mixing tank (11) and gas adsorption system passes through piping connection；Gas adsorption system and pressure-loaded system pass through piping connection；It is equipped with Gas Density Sensor (12) in the survey gas density mixing tank (11), Gas Density Sensor is connect by conducting wire with display (13)；Solving the prior art not can be used for changing the isothermal adsorption device of gas density, lead to do the technical problems such as the adsorption isotherm experiment under gas with various density conditions.
Description
Technical field
The invention belongs to experimental apparatus technical field more particularly to a kind of isothermal adsorption device for changing gas density and examinations
Proved recipe method.
Background technique
China is used as coal production big country, during coal mining activity, it is easy to natural environmental condition is destructively descended, such as
It is mixed into the original density conditions of the biggish gas and changing of density.Contain coal bed gas resource abundant in coal seam, main component is
Gas.Coal reservoir fracture system is one of important parameter of coal-bed gas exploitation, and permeability is always with the variation relation of various conditions
The concern of numerous researchers, wherein crustal stress is sensitive prime factor of its variation, but with the increase of seam mining depth,
The atmospheric density brought into therewith also increases, thus, influence of the mixed gas density to coal seam permeability can not be ignored, coal body infiltration
The relationship of rate and crustal stress has many researchers and did corresponding research, but carries out the isothermal under gas with various density conditions
Adsorption experiment is also fewer, and influence of the density of learning gas to coal gas adsorption amount is of great significance.So far, do not have also
Have the isothermal adsorption device that can be used for changing gas density, it is therefore necessary to existing adsorbent equipment carry out certain improvement with
Simulate the variation of coal mining scene mixed gas density.
Summary of the invention
The technical problem to be solved by the present invention is provide it is a kind of change gas density isothermal adsorption device and test side
Method not can be used for changing the isothermal adsorption device of gas density to solve the prior art, lead to that gas with various density cannot be done
Under the conditions of the technical problems such as adsorption isotherm experiment.
The technical scheme is that
A kind of isothermal adsorption device changing gas density, it includes: mixed gas feed system, mixed gas supply system
System passes through piping connection with gas mixer；Gas mixer and survey gas density mixing tank pass through piping connection；Survey gas
Volume density mixing tank and gas adsorption system pass through piping connection；Gas adsorption system and pressure-loaded system are connected by pipeline
It connects；Gas Density Sensor is installed, Gas Density Sensor passes through conducting wire and display in the survey gas density mixing tank
Connection.
The mixed gas feed system includes the first air accumulator and the second air accumulator；First air accumulator and gas mixing fill
It sets and is sequentially installed with first switch valve and first pressure gauge on the pipeline of connection；What the second air accumulator was connect with gas mixer
Second switch valve and second pressure gauge are sequentially installed on pipeline.
Gas mixer is sequentially installed with booster pump, vacuum pump and the with surveying on the pipeline that connect of gas density mixing tank
Five switch valves.
Gas adsorption system includes reference chamber and adsorption chamber, and reference chamber and adsorption chamber pass through piping connection；On connecting line
7th switch valve is installed；6th switch valve and third pressure gauge are installed on reference chamber air inlet pipeline；Adsorption chamber is equipped with outside
Constant temperature water bath system.
Pressure-loaded system includes axis press pump and confining pressure pump；Axis press pump and confining pressure pump respectively with the absorption of gas adsorption system
Room connection.
A kind of test method for the isothermal adsorption device changing gas density, it includes:
Raw coal sample is put into adsorption chamber by step 1 first, is opened vacuum pump and is carried out de- vacuum processing to experimental provision；
Adsorption chamber and reference chamber are put into the constant temperature water bath system for setting temperature by step 2, and are applied simultaneously to adsorption chamber permanent
Dead axle pressure and confining pressure；
Step 3 first opens the first air accumulator that helium is housed, and closes the 7th switch valve, opens the 4th switch valve, third switch valve
The 6th switch valve is opened after so that density is reached experiment setting value with the 5th switch valve, gas is passed through reference chamber, measurement pressure
The 7th switch valve is opened after power, is passed through gas in adsorption chamber, measures volume change；
It is after step 4, records of values, helium processing is clean, coal sample test specimen is changed, second switch valve, third switch are opened
Valve and the 4th switch valve, are passed through methane, make helium and methane blended, measure density by densimeter later and reach experiment setting value
Opening the 6th switch valve afterwards makes methane and helium mix gas enter reference chamber, measures pressure, the 7th is opened after stable reading
Switch valve makes gas enter adsorption chamber, and methane and helium mix gas start to be adsorbed on raw coal pore surface, and it is freely empty to measure it
Between volume；
Step 5 finally establishes a Dynamic Adsorption equilibrium state, measures the pressure and volume of mixed gas under the state, root
The gas volume being adsorbed at a given pressure is calculated according to the initial volume of mixed gas and the difference of final volume.
Beneficial effect
The present invention connects two air accumulators with gas mixer by gas mixer to make gas mixing, and even
Vacuum pump is set on adapter tube, reduces experimental error, density can be monitored in real time in gas mixing system Connection Density detecting element
Variation, and variable density can be controlled by switch valve, pass through the axis press pump and confining pressure that are connected in adsorption chamber end port and pump
It is loaded to sample, and constant temperature water bath system is set outside adsorption chamber, temperature, stress and mixed gas variable density can be carried out
The experiment that permeability is influenced.The present invention can make raw coal carry out the adsorption isotherm experiment under gas with various density conditions, and
And be able to carry out not coaxially pressure and confining pressure various factors coupling under the conditions of adsorption isotherm experiment, being capable of real simulation process of coal mining
The adsorption isotherm experiment of middle mixed gas, the experimental provision is simple to operation, and using effect is good, easy to spread；It solves existing
Technology not can be used for changing the isothermal adsorption device of gas density, leads to do the isothermal under gas with various density conditions and inhales
The technical problems such as attached experiment.
Detailed description of the invention
Fig. 1 is the whole structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of gas mixer of the present invention；
In figure: the first air accumulator of 1-, 2- first switch valve, 3- first pressure gauge, the second air accumulator of 4-, 5- second switch valve, 6-
Second pressure gauge, 7- gas mixer, 8- booster pump, 9- vacuum pump, the 5th switch valve of 10-, 12- survey gas density mixing
Case, 12- inductor, 13- display, the 6th switch valve of 14-, 15- reference chamber, 16- third pressure gauge, 18- adsorption chamber, 19- water
Bathe constant temperature system, 20- axis press pump, 21- confining pressure pump, 22- third switch valve, 23- gas mixing box, the 4th switch valve of 24-.
Specific embodiment
Please refer to Fig. 1-2
A kind of isothermal adsorption device changing gas density, it includes: mixed gas feed system, mixed gas supply system
System passes through piping connection with gas mixer 7；Gas mixer 7 and survey gas density mixing tank 11 pass through piping connection；
It surveys gas density mixing tank 11 and gas adsorption system passes through piping connection；Gas adsorption system and pressure-loaded system pass through pipe
Road connection；Gas Density Sensor 12 is installed in the survey gas density mixing tank 11, Gas Density Sensor passes through conducting wire
It is connect with display 13.
The mixed gas feed system includes the first air accumulator 1 and the second air accumulator 4；First air accumulator 1 and gas are mixed
It attaches together and is sequentially installed with first switch valve 2 and first pressure gauge 3 on the pipeline for setting 7 connections；Second air accumulator 4 is filled with gas mixing
It sets and is sequentially installed with second switch valve 5 and second pressure gauge 6 on the pipeline of 7 connections.
Booster pump 8, vacuum pump are sequentially installed on the pipeline that gas mixer 7 is connect with survey gas density mixing tank 11
9 and the 5th switch valve 10.
Gas adsorption system includes reference chamber 15 and adsorption chamber 18, and reference chamber 15 and adsorption chamber 18 pass through piping connection；Even
Adapter tube road is equipped with the 7th switch valve 17；The 6th switch valve 14 and third pressure gauge are installed on 15 air inlet pipeline of reference chamber
16；Constant temperature water bath system 19 is equipped with outside adsorption chamber (18).
Pressure-loaded system includes axis press pump 20 and confining pressure pump 21；Axis press pump 20 and confining pressure pump 21 respectively with gas absorption system
The adsorption chamber 18 of system connects.
In use, raw coal sample is put into adsorption chamber first, vacuum pump is opened, closes rest switch valve, experiment is filled
It sets and carries out de- vacuum processing, be then put into adsorption chamber and reference chamber in the constant temperature water bath system for setting temperature, and right simultaneously
Adsorption chamber applies constant shaft pressure and confining pressure.The first air accumulator that helium is housed first is opened later, closes the 7th switch valve, opens the
Four switch valves, third switch valve and the 5th switch valve, will after so that density is reached experiment setting value through mixing after a period of time
6th switch valve is opened, and gas is passed through reference chamber, is opened the 7th switch valve after measuring pressure, is passed through gas in adsorption chamber,
Measure volume change；It is after to records of values, helium processing is clean, coal sample test specimen is changed later, opens second switch valve
With third switch valve and the 4th switch valve, it is passed through methane, makes helium and methane blended, density is measured by densimeter later and is reached
Opening the 6th switch valve after experiment setting value makes methane and helium mix gas enter reference chamber, pressure is measured, to stable reading
Opening the 7th switch valve afterwards makes gas enter adsorption chamber, and methane and helium mix gas start to be adsorbed on raw coal pore surface, survey
Its fixed free space volumes, finally establish a Dynamic Adsorption equilibrium state, measure under the state pressure of mixed gas and
Volume can calculate the gas being adsorbed at a given pressure according to the initial volume of mixed gas and the difference of final volume
Volume.
Claims (6)
1. a kind of isothermal adsorption device for changing gas density, it includes: mixed gas feed system, it is characterised in that: described
Mixed gas feed system and gas mixer (7) pass through piping connection；Gas mixer (7) is mixed with gas density is surveyed
Case (11) passes through piping connection；It surveys gas density mixing tank (11) and gas adsorption system passes through piping connection；Gas absorption system
System passes through piping connection with pressure-loaded system；Gas Density Sensor is installed in the survey gas density mixing tank (11)
(12), Gas Density Sensor is connect by conducting wire with display (13).
2. a kind of isothermal adsorption device for changing gas density according to claim 1, it is characterised in that: the gaseous mixture
Body feed system includes the first air accumulator (1) and the second air accumulator (4)；First air accumulator (1) is connect with gas mixer (7)
Pipeline on be sequentially installed with first switch valve (2) and first pressure gauge (3)；Second air accumulator (4) and gas mixer (7)
Second switch valve (5) and second pressure gauge (6) are sequentially installed on the pipeline of connection.
3. a kind of isothermal adsorption device for changing gas density according to claim 1, it is characterised in that: gas mixing dress
It sets and is sequentially installed with booster pump (8) on the pipeline that (7) are connect with survey gas density mixing tank (11), vacuum pump (9) and the 5th is opened
It closes valve (10).
4. a kind of isothermal adsorption device for changing gas density according to claim 1, it is characterised in that: gas absorption system
System includes reference chamber (15) and adsorption chamber (18), and reference chamber (15) and adsorption chamber (18) pass through piping connection；Pacify on connecting line
Equipped with the 7th switch valve (17)；The 6th switch valve (14) and third pressure gauge are installed on reference chamber (15) air inlet pipeline
(16)；Constant temperature water bath system (19) are equipped with outside adsorption chamber (18).
5. a kind of isothermal adsorption device for changing gas density according to claim 1, it is characterised in that: pressure-loaded system
System includes axis press pump (20) and confining pressure pump (21)；Axis press pump (20) and confining pressure pump (21) respectively with the adsorption chamber of gas adsorption system
(18) it connects.
6. a kind of test method for the isothermal adsorption device for changing gas density, it is characterised in that: it includes:
Raw coal sample is put into adsorption chamber by step 1 first, is opened vacuum pump and is carried out de- vacuum processing to experimental provision；
Adsorption chamber and reference chamber are put into the constant temperature water bath system for setting temperature by step 2, and are applied simultaneously to adsorption chamber permanent
Dead axle pressure and confining pressure；
Step 3 first opens the first air accumulator that helium is housed, and closes the 7th switch valve, opens the 4th switch valve, third switch valve
The 6th switch valve is opened after so that density is reached experiment setting value with the 5th switch valve, gas is passed through reference chamber, measurement pressure
The 7th switch valve is opened after power, is passed through gas in adsorption chamber, measures volume change；
It is after step 4, records of values, helium processing is clean, coal sample test specimen is changed, second switch valve, third switch are opened
Valve and the 4th switch valve, are passed through methane, make helium and methane blended, measure density by densimeter later and reach experiment setting value
Opening the 6th switch valve afterwards makes methane and helium mix gas enter reference chamber, measures pressure, the 7th is opened after stable reading
Switch valve makes gas enter adsorption chamber, and methane and helium mix gas start to be adsorbed on raw coal pore surface, and it is freely empty to measure it
Between volume；
Step 5 finally establishes a Dynamic Adsorption equilibrium state, measures the pressure and volume of mixed gas under the state, root
The gas volume being adsorbed at a given pressure is calculated according to the initial volume of mixed gas and the difference of final volume.
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| CN201910263358.6A CN109870400A (en) | 2019-04-02 | 2019-04-02 | A kind of isothermal adsorption device and test method changing gas density |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562897U (en) * | 2012-05-29 | 2012-11-28 | 西安科技大学 | Multi-component gas absorption/desorption integrated experimental device for outsized coal sample |
| CN105547908A (en) * | 2016-01-22 | 2016-05-04 | 贵州大学 | Experimental testing equipment for mixed gas adsorption capacity of coal rock/shale |
| CN106018166A (en) * | 2016-04-28 | 2016-10-12 | 河南理工大学 | Multicomponent gas adsorption simulation experiment method and device |
| CN107884307A (en) * | 2017-12-28 | 2018-04-06 | 贵州大学 | A kind of isothermal adsorption device for changing gas humidity |
| CN107884328A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus for measuring mixed gas content change |
| CN209690139U (en) * | 2019-04-02 | 2019-11-26 | 贵州大学 | A kind of isothermal adsorption device changing gas density |
-
2019
- 2019-04-02 CN CN201910263358.6A patent/CN109870400A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202562897U (en) * | 2012-05-29 | 2012-11-28 | 西安科技大学 | Multi-component gas absorption/desorption integrated experimental device for outsized coal sample |
| CN105547908A (en) * | 2016-01-22 | 2016-05-04 | 贵州大学 | Experimental testing equipment for mixed gas adsorption capacity of coal rock/shale |
| CN106018166A (en) * | 2016-04-28 | 2016-10-12 | 河南理工大学 | Multicomponent gas adsorption simulation experiment method and device |
| CN107884328A (en) * | 2017-12-01 | 2018-04-06 | 贵州大学 | A kind of three axle seepage apparatus for measuring mixed gas content change |
| CN107884307A (en) * | 2017-12-28 | 2018-04-06 | 贵州大学 | A kind of isothermal adsorption device for changing gas humidity |
| CN209690139U (en) * | 2019-04-02 | 2019-11-26 | 贵州大学 | A kind of isothermal adsorption device changing gas density |
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