CN106215621A - A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction - Google Patents
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction Download PDFInfo
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- CN106215621A CN106215621A CN201610830505.XA CN201610830505A CN106215621A CN 106215621 A CN106215621 A CN 106215621A CN 201610830505 A CN201610830505 A CN 201610830505A CN 106215621 A CN106215621 A CN 106215621A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/025—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with wetted adsorbents; Chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
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- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of methane adsorption concentration systems for extremely low concentration mash gas extraction.Including dry decontamination device, gas compressing apparatus, quantitative sampling device, Adsorption Concentration device and low methane concentrations component collection device, high methane concentration component collection device.Derive from the methane gas of low concentration gas extraction pipeline after dry decontamination, compression process, enter Adsorption Concentration device by quantitative sampling device, obtain efficiently separating concentration.The time sequencing of packed column is flowed out according to gas, select to enter low methane concentrations component collection device or high methane concentration component collection device, carrier gas is not adsorbed in low high methane concentration component collection device, returning to system through gas compressing apparatus after outflow recycle, the low high concentration methane component without carrier gas is enriched with in gas collector simultaneously.The present invention makes the air-flow of entrance system be mutually adapted with the Adsorption Concentration ability of native system, prevents back flow of gas simultaneously, can accurately control the collection of higher concentration gas, and carrier gas can be recycled, cost-effective.
Description
Technical field
The present invention relates to coal mine gas purification technique field, particularly relate to a kind of methane for extremely low concentration mash gas extraction
Adsorption Concentration system.
Background technology
In China, annual loss coal bed gas resource about 200 billion cubic meter, wherein, coal extraction gas utilization rate is only 40%
Left and right, a large amount of gas are directly emptied, and cause the huge wasting of resources and serious environmental pollution.The big portion of China's coal-mine extraction
Dividing gas is low concentration gas, and the extraction of a large amount of goafs or the coal bed drilling gas density through long-time extraction can profits less than at present
With the least concentration (about 6%) of gas, this is the major reason causing China's gas utilization rate low.Therefore, taking out extremely low concentration
Mash gas (1% <C CH4< 6%) purify for higher concentration available gas (C CH4>=6%), for improving coal extraction watt
This utilization rate is significant.Existing gas concentrates purification technique and mainly includes cryogenic rectification isolation technics, membrane separation technique
With pressure swing adsorption etc., the product gas methane concentration of above technology is high, but technical matters is complicated, and cost is high, and to extremely low dense
The bad adaptability that degree gas purifies.To this end, need one badly to be applicable to low concentration gas and technique gas simple, lower-cost carries
Pure technology.
Summary of the invention
The technical problem to be solved is, overcomes the defect that prior art exists, it is proposed that a kind of for pole
The methane adsorption concentration systems of low concentration mash gas extraction.The principle that this system is analyzed by gas chromatogram adsorbing separation, employing is filled out
Filling the post carrier as Adsorption Concentration, multicolumn is in parallel.The mixed gas of methane and air enters packed column under the drive of carrier gas,
Gas carries out adsorption-desorption in packed column and reaches partition equilibrium, and constituent of air flows out packed column prior to methane, utilize air and
The time difference of methane outflow packed column realizes the concentration of methane.Less demanding to adsorbent of this system, low cost, technique letter
Single, gas concentration refining effect is preferable.
For achieving the above object, the technical solution used in the present invention is:
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction, including dry decontamination device, gas compressing apparatus,
Quantitative sampling device, Adsorption Concentration device and low methane concentrations component collection device, high methane concentration component collection device.
Described dry decontamination device, gas compressing apparatus and quantitative sampling device are sequentially connected in series by pipeline, source of the gas from
In low concentration gas extraction pipeline.
Described Adsorption Concentration device, comprises multiple packed column device in parallel.Described packed column device in parallel, is entered to have more by one
Check valve (or one enter to have more joint), as air inlet, enters one more and goes out check valve (or enter go out joint) more and do gas outlet, will be many
Root packed column parallel connection is constituted.The air inlet of all packed column devices in parallel is connected on same multi-position reversing valve, as absorption
Enrichment facility air inlet port.Each packed column device gas outlet in parallel is all connected with a three-way magnetic valve, and three-way magnetic valve one tunnel is even
Connecing low methane concentrations component collection device air inlet, another road connects high methane concentration component collection device air inlet.Low methane is dense
Access multi-position reversing valve after spending component collection device gas outlet and high methane concentration component collection device gas outlet and connecing, formed and carry
Gas circulation line.
Described quantitative sampling device is serially connected in the multi-position reversing valve end of carrier gas circulation line.
Described quantitative sampling device, utilizes Electromagnetic Drive or the dynamic control of gas drive, uses volume weight tube or the post etc. of fixed volume.
Adsorption Concentration device can carry out air inlet switching by multiposition valve between each packed column device in parallel, it is ensured that concentrated gas
Flowing continually out of body.
Further, described packed column device in parallel is placed in temperature control type and adds in hot tank.Temperature control type adds hot tank, can be according to need
Want design temperature and intensification cooling process, it is adaptable to the control of Adsorption Concentration temperature conditions and the activation process of packed column.
Described packed column specification is diameter 3 ~ 6 millimeters, the stainless steel tube of long 3 ~ 5 meters, can select to load 5A molecule in post
Sieve, carbon molecular sieve etc..
Gas concentration detector to be concentrated is set in the gas outlet of described quantitative sampling device, in described high methane concentration group
Divide collection device air inlet that concentrated gas concentration detector is set.
Described low methane concentrations component collection device and high methane concentration component collection device all use the simple change of trial-production
Pressure adsorbent equipment, fills activated carbon and carbon molecular sieve respectively in adsorber.
The methane adsorption concentration systems of extremely low concentration mash gas extraction of the present invention, it is achieved the work of goal of the invention and running
As follows:
(1) derive from the methane gas of low concentration gas extraction pipeline, after dry decontamination device removes chalk dust removing and moisture, enter
Enter gas compressing apparatus and be compressed to desirable pressure (~ 0.4 MPa), become high pressure gas to be concentrated.
(2) high pressure gas to be concentrated enters Adsorption Concentration device, wherein by quantitative sampling device under the drive of carrier gas
Comprise multiple packed column device in parallel, in 1 ~ 3 minute, multiple-way valve gas to be concentrated is switched to different parallel connections successively and fill
Column device, the gas flow to be concentrated entering each packed column device in parallel is 0.1 ~ 5 liter, and flow rate of carrier gas is 0.3 ~ 5 liter/min.
Each packed column device in parallel comprisesnThe packed column of individual parallel connection,nIndividual packed column simultaneously to the gas absorption to be concentrated flowed through, point
From, utilizing the principle of gas chromatogram adsorbing separation, gas carries out adsorption-desorption in packed column and reaches partition equilibrium, air and first
The time of break-through that alkane flows through packed column is different, successively flows through outlet and then concentration difference occurs.Multiple packed column devices in parallel it
Between switching, it is ensured that flowing continually out of concentrated gas.
(3) the delivery time scope of air, the three-way magnetic valve of each packed column device end in parallel it are determined by experiment
In stipulated time action, the constituent of air entrance low methane concentrations component collection device containing a small amount of methane, and corresponding high methane
The component of concentration flows through concentrated gas concentration detector D2 after converging, enter high methane concentration component collection device；
(4) carrier gas is not adsorbed in low high methane concentration component collection device, return to through gas compressing apparatus after outflow be
System recycles, and the final low high concentration methane component without carrier gas is enriched with in gas collector.
That this device carries out gas concentration it is critical that the time interval of quantitative sample injection, the action interval and three of multiposition valve
The action control of three-way electromagnetic valve.Compared with prior art, the methane adsorption for extremely low concentration mash gas extraction that the present invention provides
Concentration systems, simple in construction, less demanding to the adsorbent filled, low cost, it is adaptable to extremely low concentration gas concentrates, can be by first
Alkane concentration improves 3% ~ 5%, thus is purified by the most available extremely low concentration gas as may utilize gas, for improving coal mine gas
Utilization rate is significant, and the concentrating and separating of other types of gases is had preferable universality.Packed column is as suction
The carrier of attached concentration, uses multicolumn parallel-connection structure mode, and gas to be concentrated passes through chromatographic column under carrier gas drives, due to each component
Molecule is different by the adsorption strength of filler in post, makes different component pass through the speed difference of post, thus can be in the different time
Arriving the end of post, concentration difference before and after generation, gas concentration is effective, and practicality is extremely strong.
Accompanying drawing explanation
Fig. 1 present invention is for the methane adsorption concentration systems structural representation of extremely low concentration mash gas extraction.
The structural representation of quantitative sampling device in Fig. 2 present invention.Wherein, figure I is collection and confinement of gases position, and figure II is quantitative
Sample introduction position.
Reference:
1-gas pumping pipeline；2-temperature control type adds hot tank；3-parallel connection packed column device；D1-gas concentration to be concentrated detector；
D2-concentrated gas concentration detector；V0-multiposition valve；V1-V7-three-way magnetic valve；M1-mono-enters to have more joint；M2-enters one more and goes out
Joint；A-low methane concentrations component；B-height methane concentration component.The quantitative post of 21-；22-gas access to be concentrated；23-carrier gas enters
Mouthful.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1 be that the methane adsorption concentration systems structure for extremely low concentration mash gas extraction that the present invention proposes is shown
Being intended to, in figure, arrow represents airflow direction.Present system is by gas pumping pipeline 1, dry decontamination device, gas compression dress
Put, quantitative sampling device, Adsorption Concentration device and low methane concentrations component collection device, high methane concentration component collection device structure
Become.
Described dry decontamination device, gas compressing apparatus and quantitative sampling device are sequentially connected in series by pipeline.
Described Adsorption Concentration device, comprises seven packed column devices 3 in parallel.Each packed column device 3 in parallel is by many (two
Root or more than two) packed column parallel connection constitutes, and selects one to enter to have more joint M1 as air inlet, and select to enter one more and go out joint M2 and do
Many packed columns are connected in parallel between the two by gas outlet, constitute packed column device 3 in parallel.The one of all packed column devices in parallel
Enter to have more joint M1(air inlet) it is both connected on same multiposition valve V0, as Adsorption Concentration device air inlet port.Each parallel connection
Entering of packed column device one goes out joint M2(gas outlet more) it is all connected with a three-way magnetic valve (V1-V7), each three-way magnetic valve
(V1-V7) road connects low methane concentrations component collection device air inlet, and another road connects high methane concentration component collection device and enters
QI KOU.Low methane concentrations component collection device gas outlet and high methane concentration component collection device gas outlet two are entered one and are gone out joint
And receive multi-position reversing valve V0, form carrier gas circulation line.
Described quantitative sampling device is serially connected in the multi-position reversing valve V0 end of carrier gas circulation line.At quantitative sampling device with many
Gas concentration detector D1 to be concentrated is set on pipeline between position switching valve V0.
Packed column device 3 in parallel is placed in temperature control type and adds in hot tank 2.
At described high methane concentration component collection device air inlet, concentrated gas concentration detector D2 is set.
In the present invention, packed column specification is diameter 3 ~ 6 millimeters, the stainless steel tube of long 3 ~ 5 meters, can select to load 5A in post
Molecular sieve, carbon molecular sieve etc..
Described low methane concentrations Fraction collection and high methane concentration component collection device all use the simple transformation of trial-production to inhale
Adsorption device, fills activated carbon and carbon molecular sieve respectively in adsorber.
Quantitative sampling device, utilizes Electromagnetic Drive or the dynamic control of gas drive, uses volume weight tube or the post etc. of fixed volume, structure
Fig. 2 is shown in by schematic diagram.
Extraction gas sequentially pass through dry decontamination device, gas compressing apparatus, quantitative sampling device, Adsorption Concentration device and
Gas collector (includes low methane concentrations component collection device and high methane concentration component collection device).Packed column is to methane
Good adsorbing separation effect is had, by the adsorption-desorption process of packed column, it is achieved the concentration of gas with air.Add hot tank with
Function of temperature control, can design temperature and intensification cooling process as required, it is adaptable to the control of Adsorption Concentration temperature conditions and
The activation process of packed column.One enters to have more joint M1 and enters one more and go out joint M2, and joint dead volume is little and gas can be prevented inverse
Stream.Gas concentration detector D1 to be concentrated and concentrated gas concentration detector D2 predominantly detects methane and nitrogen in gas body
Content.Multiposition valve V0 is used for realizing the switching in Adsorption Concentration device between multiple packed column devices in parallel, it is ensured that concentrated gas
Flow continually out.Three-way magnetic valve VmControl the collection approach of eluting gas.
The work process of present system:
(1) gas source is mine low concentration mash gas extraction pipeline, after dry decontamination, compression process, becomes high pressure and treats dense
Contracting gas.
(2) the present embodiment sets methane content about 3% in gas to be concentrated, by quantitative sampling device at the band of carrier gas
Dynamic lower entrance Adsorption Concentration device.Adsorption Concentration device includes I-VII seven packed column device in parallel, each packed column dress in parallel
Put the packed column in parallel containing 10.Quantitative sampling device selects the sample introduction post of fixed volume, and each sample size is 1 liter, at 2 points
In clock, multiple-way valve V0 gas to be concentrated switched to successively different packed column devices in parallel.Packed column specification is diameter 3 milli
Rice, the stainless steel tube of long 3 meters, load 5A molecular sieve in post, flow rate of carrier gas is 300 ml/min, and 10 packed columns simultaneously work as
Adsorbing separation effect, utilizes the principle of gas chromatogram adsorbing separation, and gas carries out adsorption-desorption in packed column, and to reach distribution flat
Weighing apparatus, air, methane successively exported through packed column in 2 minutes, it is achieved concentration difference front and back.Seven packed column devices in parallel lead to
Cross switching to work successively, it is ensured that flowing continually out of concentrated gas.
(3) it is determined by experiment, when 0 ~ 1.5 minute, mainly air in packed column eluting gas in parallel, therefore, for
Three-way magnetic valve V1 ~ V7, switches over when the packed column device sample introduction in parallel 1.5 minutes of its correspondence respectively, before 1.5 minutes,
Eluting gas enters low methane concentrations component collection device, and after 1.5 minutes, eluting gas is examined through concentration gas concentration after converging
Surveying device D2, enter high methane concentration component collection device, final goal concentration is 6%.
(4) carrier gas is not adsorbed in low high methane concentration component collection device, returns through gas compressing apparatus after outflow
Recycling to system, the final low high concentration methane component without carrier gas is enriched with in gas collector.
The parameter arranged according to above example, the device of present invention offer is per minute can process 3.5 liters of high pressure extractions
Gas, according to the thinking of the present invention, can be amplified according to colliery situation on the spot, industrialization, the gas pumping of different mines
Flow velocity is different and gas density is different, can select the packed column device in parallel of different size, varying number.Or can basis
Practical situation considers to carry out repeatedly gradient centrifugation.
Claims (5)
1. for a methane adsorption concentration systems for extremely low concentration mash gas extraction, including dry decontamination device, gas compression dress
Put, quantitative sampling device, Adsorption Concentration device and low methane concentrations component collection device, high methane concentration component collection device；
It is characterized in that:
Described dry decontamination device, gas compressing apparatus and quantitative sampling device are sequentially connected in series by pipeline；
Described Adsorption Concentration device, comprises multiple packed column device in parallel；Described packed column device in parallel, is entered to have more unidirectional by one
Valve, as air inlet, enters one more and goes out check valve and do gas outlet, many packed column parallel connections is constituted；All packed column devices in parallel
Air inlet is connected on same multi-position reversing valve, as Adsorption Concentration device air inlet port；Each packed column device in parallel is given vent to anger
Mouth is all connected with a three-way magnetic valve, and three-way magnetic valve one tunnel connects low methane concentrations component collection device air inlet, another road
Connect high methane concentration component collection device air inlet；Low methane concentrations component collection device gas outlet and high methane concentration component are received
Acquisition means gas outlet also accesses multi-position reversing valve after connecing, and forms carrier gas circulation line；
Described quantitative sampling device is serially connected in the multi-position reversing valve end of carrier gas circulation line.
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction, is characterized in that: institute
State packed column device in parallel to be placed in temperature control type and add in hot tank.
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction, is characterized in that: institute
Stating packed column is diameter 3 ~ 6 millimeters, the stainless steel tube of long 3 ~ 5 meters, loads 5A molecular sieve or carbon molecular sieve in post.
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction, is characterized in that:
The gas outlet of described quantitative sampling device arranges gas concentration detector to be concentrated, in described high methane concentration component collection device
Air inlet arranges concentrated gas concentration detector.
A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction, is characterized in that: institute
State low methane concentrations component collection device and high methane concentration component collection device all uses pressure swing adsorber, in adsorber respectively
Fill activated carbon and carbon molecular sieve.
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| CN201610830505.XA CN106215621B (en) | 2016-09-19 | 2016-09-19 | A kind of methane adsorption concentration systems for extremely low concentration mash gas extraction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834707A (en) * | 2021-09-15 | 2021-12-24 | 广州海洋地质调查局 | Experimental preparation device for methane stock solution for measuring Henry constant standard |
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| WO2010143012A1 (en) * | 2009-06-09 | 2010-12-16 | National Taiwan University Of Science And Technology | Fluid separation method and fluid separation apparatus |
| CN101653721A (en) * | 2009-09-15 | 2010-02-24 | 重庆大学 | Preparation method of coal-based granular activated carbon with molecular sieving effect and application thereof in pressure-transformation adsorption and separation concentrated gas |
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| CN113834707A (en) * | 2021-09-15 | 2021-12-24 | 广州海洋地质调查局 | Experimental preparation device for methane stock solution for measuring Henry constant standard |
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