CN103316565B - Efficient enrichment and separation equipment for ultralow-concentration gas - Google Patents
Efficient enrichment and separation equipment for ultralow-concentration gas Download PDFInfo
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- CN103316565B CN103316565B CN201310237011.7A CN201310237011A CN103316565B CN 103316565 B CN103316565 B CN 103316565B CN 201310237011 A CN201310237011 A CN 201310237011A CN 103316565 B CN103316565 B CN 103316565B
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- 238000000926 separation method Methods 0.000 title claims abstract description 12
- 238000001179 sorption measurement Methods 0.000 claims abstract description 149
- 238000010521 absorption reaction Methods 0.000 claims abstract description 69
- 239000003463 adsorbent Substances 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 25
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 230000000694 effects Effects 0.000 claims description 12
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- 238000004804 winding Methods 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 268
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 7
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- 238000004458 analytical method Methods 0.000 description 17
- 239000003245 coal Substances 0.000 description 13
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- 230000001276 controlling effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
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Abstract
The invention provides efficient enrichment and separation equipment for ultralow-concentration gas. The efficient enrichment and separation equipment comprises an air compressor, a mass flow meter, a solenoid valve, an infrared ray gas analyzer, a vacuum pump and an online collection system. The equipment has the advantages that a double-tower adsorption and desorption system is arranged; one tower is used for adsorption while the other tower is used for desorption; room-temperature and normal-pressure absorption, vacuum desorption and reaction conditions are easy to realize and the possibility of industrial large-scale production exists; the ultralow-concentration gas which is lower than 0.5% can be separated and purified and the problem that mine gas which is lower than 0.1% can not be used. The adsorption tower is internally provided with three adsorption pipelines which are connected in series so as to prolong the gas penetration time and improve the adsorption efficiency of an adsorbent; the adsorption tower is internally provided with a buffering region and is connected with a desorption tower through a pipeline so as to reduce the energy consumption of the vacuum pump in the switching work process, and improve the economic efficiency; a multi-grade concentration lifting device can meet different working conditions and can recycle low-concentration methane in product gas so as to further reduce the discharging of the methane.
Description
Technical field
The present invention discloses a kind of ultralow concentration gas efficiently concentrating separation equipment, belongs to resource and energy field, mainly comprises: air compressor, mass flowmenter, magnetic valve, infrared gas analyzer, vavuum pump, on-line acquisition system etc.
Background technology
China's coal bed gas resource rich reserves, buried depth 2000m with in shallow coal bed gas resource reserves, allowable exploitation about 36.86 trillion m
3, but in the process of exploitation, coal bed gas makes methane concentration only have 20%-45% because of being mixed into of air, even lower, the too low and economic worth of long distance Pipeline transport of the coal bed gas combustion heat value crossing low concentration.For preventing coal mine gas from explosion, the processing method in past is that mine ventilation is emptying or carry out gas drainage under suction, makes Mine Methane avoid the explosion ratio scope of 5%-15%.China is every year to airborne release 15,000,000,000 m
3coal bed gas mainly containing methane, account for 1/3 of world's total emission volumn.CH
4the greenhouse effects produced are CO
221 times, methane row people's air and cause unusual weather conditions and the destruction to ozone layer, has become the significant problem of whole world facing.
Therefore, how methane concentration is used, has become the matter of utmost importance of cbm development.Exploitation low concentration coal-bed gas purification technique can not only improve safety of coal mines, reduce environmental pollution, also contributes to solving the difficult problems such as China's energy resource structure is unreasonable, energy shortage.Pressure swing adsorption method can effectively solve this technical barrier, and the method by low concentration coal mine gas separating-purifying, can obtain high concentration methane gas, is the device of a kind of effective and feasible solution mine gas waste problem.But the pressure-swing absorption apparatus of design at present all rests on the Mine Gas of absorption purification concentration > 1%, and the absorption purification field of the methane gas lower than 1% has to be developed.
Device of the present invention, the methane gas of absorption purification 0.1%-5%, make up lower than 1% methane gas cannot to adsorb the technology and equipment of purification blank.
Summary of the invention
The object of this invention is to provide a kind of containing releasing souls from purgatory the gas separaion adsorbent equipment of concentration methane gas lower than 1%, it solving existing mine air-lack and being directly discharged into the problems such as wasting energy of existing in air and contaminated environment, and reaching the effect of recycling.In the present invention, the design of the absorption pipeline of S type series connection, can extend time of break-through, improves the adsorption efficiency of methane; Between two towers, the design of buffer area is the further improvement to all pressing mode in existing technique, makes purified gases adsorb in adsorption tower to a great extent more reasonable, and reduces energy consumption; Multistage concentration lifting device, can obtain the methane gas of variable concentrations according to different requirements, the setting of tail gas recycle station arrangement, can utilize methane to greatest extent, improve methane recovery further.General structure design of the present invention is reasonable, and volume is little, reduces cost of investment and floor space, can effectively utilize the methane in coal mine methane to provide a large amount of clean energy resource, promotes the volumetric of coalmine ventilation, advances Safety of Coal Mine Production.
The technical problem to be solved in the present invention is to provide a kind of pressure-swing absorber, effectively improves the adsorption efficiency to low-concentration methane gas.Device of the present invention can make concentration lower than 0.5% coal mine mash gas be enriched to and there is high heating value and the high concentration methane gas of extensive use.
A kind of ultralow concentration gas efficiently concentrating separation equipment, this equipment first order concentration lifting device comprises air compressor 1, first mass flowmenter 2, second mass flowmenter 7, first surge tank 3, second surge tank 6, 3rd surge tank 11, first magnetic valve 4a, second magnetic valve 4b, 3rd magnetic valve 4c, 4th magnetic valve 4d, 5th magnetic valve 4e, 6th magnetic valve 4f, 7th magnetic valve 4g, 8th magnetic valve 4h, vavuum pump 5, the first infrared gas analyzer 8a, second infrared gas analyzer 8b, 3rd infrared gas analyzer 8c, the first pressure limiting valve 9, second pressure limiting valve 16, check valve 10, capture card 12, computer 13, first order adsorption tower 14a, first order Analytic Tower 14b, spinner flowmeter 15, PLC17, the first Pressure gauge 18a, second Pressure gauge 18b, 3rd Pressure gauge 18c, 4th Pressure gauge 18d, the first liquid measure display instrument 19a, second liquid measure display instrument 19b, the first drying tube 20a, second drying tube 20b, 3rd drying tube 20c, vacuum display instrument 21, establishes the first absorption pipeline 22 in described first order adsorption tower 14a, second absorption pipeline 23, 3rd absorption pipeline 24, first connecting pipe 25, first buffer area A and the 9th magnetic valve 26a, the first parsing pipeline 27 is established in described first order Analytic Tower 14b, second resolves pipeline 28, 3rd resolves pipeline 29, second connecting pipe 30, second buffer area B and the tenth magnetic valve 26b, the second level, the third level and fourth stage concentration lifting device are identical with installation site with first order concentration lifting device equipment composition,
Wherein, described air compressor 1 is contacted through described first mass flowmenter 2 and the first surge tank 3, and described first surge tank 3 is connected with the lower end of first order Analytic Tower 14b with first order adsorption tower 14a respectively by the second magnetic valve 4b, the 4th magnetic valve 4d; The gas circuit that described first surge tank 3 and the first drying tube 20a, the second pressure limiting valve 16 and the first infrared gas analyzer 8a form is contacted; Described first magnetic valve 4a, the 3rd magnetic valve 4c connect the lower end of first order adsorption tower 14a and first order Analytic Tower 14b respectively, and are connected with the second magnetic valve 4b, the 4th magnetic valve 4d; Described first order adsorption tower 14a is connected by the 8th magnetic valve 4h with in the middle part of first order Analytic Tower 14b tower body; Narrate the first magnetic valve 4a, the 3rd magnetic valve 4c parallel with one another after be connected with vavuum pump 5, second surge tank 6, second drying tube 20b, the second mass flowmenter 7, second infrared gas analyzer 8b successively; Described second infrared gas analyzer 8b end resolution gas gas outlet is connected with the unstripped gas air inlet of second level concentration lifting device; The resolution gas outlet side of described second level concentration lifting device is connected with third level concentration lifting device unstripped gas air inlet; The resolution gas outlet side of described third level concentration lifting device is connected with fourth stage concentration lifting device unstripped gas air inlet; Described first order adsorption tower 14a upper end is connected with the first Pressure gauge 18a with the 5th magnetic valve 4e; Described first order Analytic Tower 14b upper end is connected with the second Pressure gauge 18b with the 6th magnetic valve 4f; Described first Pressure gauge 18a is connected by the 7th magnetic valve 4g with the second Pressure gauge 18b; Described 5th magnetic valve 4e is connected with check valve 10 leading portion with after the 6th magnetic valve 4f parallel connection; Described check valve 10 rear end is connected with the 3rd surge tank 11 leading portion; Narrate the 3rd surge tank 11 to connect with the 3rd drying tube 20c, the first pressure limiting valve 9, spinner flowmeter 15, the 3rd infrared gas analyzer 8c successively; Described 3rd infrared gas analyzer 8c end prod gas gas outlet connects device for recovering tail gas; Described device for recovering tail gas is connected with first order concentration lifting device unstripped gas inlet end; The described second level, the third level and fourth stage concentration lifting device are identical with installation site with first order concentration lifting device equipment composition.
Described quality first flowmeter 2, second gauge 7 are connected with computer 12; The described first order adsorption tower 14a that is placed in is connected with the 4th Pressure gauge 18d with the 3rd Pressure gauge 18c of first order Analytic Tower 14b lower end; Described first magnetic valve 4a, the second magnetic valve 4b, the 3rd magnetic valve 4c, the 4th magnetic valve 4d, the 5th magnetic valve 4e, the 6th magnetic valve 4f, the 7th magnetic valve 4g, the 8th magnetic valve 4h, the 9th magnetic valve 26a, the tenth magnetic valve 26b and PLC17 are connected; Described PLC17 is connected with computer 13 after connecting with online acquisition card 12.
First order adsorption tower 14a internal structure is: comprise and being made up of the pipeline of the first absorption pipeline 22, second absorption pipeline 23, the S-shaped series connection of the 3rd absorption pipeline 24 3 segment pipe and the first buffer area A.Be placed with adsorbent activity carbon in pipeline, beyond pipeline, adsorption tower is the first buffer area A with inner region, and the first buffer area A and the 3rd is adsorbed pipeline 24 and is connected by the first connecting pipe 25, is provided with the 9th magnetic valve 26a in the first connecting pipe 25.
First order Analytic Tower 14b internal structure is: comprise and being made up of the pipeline of the first parsing pipeline 27, second parsing pipeline 28, the S-shaped series connection of the 3rd parsing pipeline 29 3 segment pipe and the second buffer area B.Be placed with adsorbent activity carbon in pipeline, beyond pipeline, adsorption tower is the second buffer area B with inner region, and the second buffer area B and the 3rd is resolved pipeline 29 and is connected by the second connecting pipe 30, is provided with the tenth magnetic valve 26b in the second connecting pipe 30.
Further, the pipe diameter of pipeline of S-shaped series connection in adsorption tower or Analytic Tower and the ratio of total length are 1:4 ~ 1:12.
Built-in S type series connection adsorption tower design parameter
This adsorption tower internal structure as shown in Figures 2 and 3, the absorption pipeline that first absorption pipeline 22, second adsorbs pipeline 23, the 3rd absorption pipeline 24 is connected for S shape, adsorbent activity carbon is placed with in pipeline, first buffer area A and the 3rd is adsorbed pipeline 24 and is connected by the first connecting pipe 25, is provided with the 9th magnetic valve 26a in the first connecting pipe 25; First resolves the absorption pipeline that pipeline 28 resolved by pipeline 27, second, the 3rd parsing pipeline 29 is connected for S shape, adsorbent activity carbon is placed with in pipeline, second buffer area B and the 3rd is resolved pipeline 29 and is connected by the second connecting pipe 30, is provided with the tenth magnetic valve 26b in the second connecting pipe 30.
The ratio of absorption Analytic Tower interior conduit diameter and total length is generally 1:4 ~ 1:12, pipe diameter and length are by affecting methane time of break-through, thus affect the adsorption efficiency of methane and final methane recovery efficiency, therefore need to select concrete numerical value according to concrete raw gas flow and flow velocity.
The optimum ratio that the present invention specifically chooses absorption Analytic Tower interior conduit diameter and total length is 1:9, designs raw gas flow design adsorption tower and the Analytic Tower of 500sccm.Therefore, in adsorption tower, the first absorption pipeline, the second absorption pipeline, the 3rd absorption line size are Φ 80mm × 4mm, long 240mm, and adsorption tower is of a size of Φ 126mm × 10mm, long 250mm; Space between adsorption tube pipeline outer wall and adsorption tower inwall is as buffer area.Speciality wire netting is placed in absorption pipeline and buffer area, and in adsorption tower, raw material specific area loaded by absorption pipeline is 600-800m
2/ g reaches 1000-2500m through modified specific area
2the active carbon 250g of/g, loads active carbon 25g in buffer area; The physical dimension of Analytic Tower and adsorption tower is with to load thing all identical.
Compared with general adsorption tower, the present invention's built-in S type series connection adsorption tower, the design in S bend pipe road adds the time of break-through of gas in adsorption tower, can the methane gas of adsorption of Low Concentration more fully, the gases methane concentration finally obtained can reach more than 70%-99%, reaches as high as 99.88%; Organic efficiency can reach more than 95-99%, reaches as high as 99.99%, exceeds 5-8% than general adsorption tower efficiency, and due to the existence of buffer area, reduces in switch operating process, the energy consumption of vavuum pump, improves business efficiency.
Tool of the present invention has the following advantages: double tower adsorption-desorption system, and while a tower carries out adsorbing, another tower carries out desorption; Room temperature, normal pressure adsorb, vacuum analysis, and reaction condition easily reaches, and has the possibility of industrialized production; Can separating-purifying lower than the ultralow concentration gas of 0.5%, effectively solve the mine gas difficult problem that cannot make full use of lower than 1%.
The difference of inventing with other is, is provided with 3 absorption of mutually connecting and resolves pipeline, add the gas penetration time, improve the adsorption efficiency of adsorbent in absorption Analytic Tower; Be provided with buffer area in absorption Analytic Tower, and by pipeline, two the absorption Analytic Towers being in different operating state be connected, reduce in switch operating process, the energy consumption of vavuum pump, improve business efficiency; Multistage concentration lifting device, can meet different operating condition, and can reclaim the methane of low concentration in gas product, reduces the discharge of methane further.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, type of the present invention is further described.
Fig. 1 is a kind of structural framing figure of the present invention.
In figure, sequence number illustrates first order concentration lifting device: air compressor 1, first mass flowmenter 2, second mass flowmenter 7, first surge tank 3, second surge tank 6, 3rd surge tank 11, first magnetic valve 4a, second magnetic valve 4b, 3rd magnetic valve 4c, 4th magnetic valve 4d, 5th magnetic valve 4e, 6th magnetic valve 4f, 7th magnetic valve 4g, 8th magnetic valve 4h, vavuum pump 5, first infrared gas analyzer 8a, second infrared gas analyzer 8b, 3rd infrared gas analyzer 8c, first pressure limiting valve 9, second pressure limiting valve 16, check valve 10, capture card 12, computer 13, first adsorption tower 14a, first order Analytic Tower 14b, spinner flowmeter 15, PLC17, first Pressure gauge 18a, second Pressure gauge 18b, 3rd Pressure gauge 18c, 4th Pressure gauge 18d, first liquid measure display instrument 19a, second liquid measure display instrument 19b, first drying tube 20a, second drying tube 20b, 3rd drying tube 20c, vacuum display instrument 21,
The second level, the third level and fourth stage concentration lifting device are identical with installation site with first order concentration lifting device equipment composition;
Fig. 2 a is first order adsorption tower embedding structure top view
Fig. 2 b is first order Analytic Tower embedding structure top view
22,23,24 pipelines are the absorption pipeline of S shape series connection, are placed with adsorbent activity carbon in pipeline, and buffer area A is connected by pipeline 25 with absorption pipeline 24, is provided with the 9th magnetic valve 26a in pipeline 25; 27,28,29 pipelines are the absorption pipeline of S shape series connection, are placed with adsorbent activity carbon in pipeline, and buffer area B is connected by pipeline 30 with absorption pipeline 29, is provided with the tenth magnetic valve 26b in pipeline 30.
Fig. 3 a is first order adsorption tower built-in pipe side view
Fig. 3 b is first order Analytic Tower built-in pipe side view
The absorption pipeline that first absorption pipeline 22, second adsorbs pipeline 23, the 3rd absorption pipeline 24 is connected for S shape, adsorbent activity carbon is placed with in pipeline, first buffer area A and the 3rd is adsorbed pipeline 24 and is connected by the first connecting pipe 25, is provided with the 9th magnetic valve 26a in the first connecting pipe 25; First resolves the absorption pipeline that pipeline 28 resolved by pipeline 27, second, the 3rd parsing pipeline 29 pipeline is the series connection of S shape, adsorbent activity carbon is placed with in pipeline, second buffer area B and the 3rd is resolved pipeline 29 and is connected by the second connecting pipe 30, is provided with the tenth magnetic valve 26b in the second connecting pipe 30.
Detailed description of the invention
Concrete structure of the present invention is described in detail according to Fig. 1.Should containing separate absorbent device of low-concentration methane gas comprise air distributing device air compressor 1 by unstripped gas purity be 99.99% methane gas and air be made into certain density low-concentration methane gas, gas flow controls and buffering drying device first mass flowmenter 2, second mass flowmenter 7, first surge tank 3, second surge tank 6, 3rd surge tank 11 and the first drying tube 20a be connected between surge tank and flowmeter, second drying tube 20b, 3rd drying tube 20c, the gas flow entered in type device of the present invention by the first mass flowmenter 2 detection and control carrys out restraint device gas in pipelines pressure by the first surge tank 3 second surge tank 6 and the 3rd surge tank 11, by the first drying tube 20a, second drying tube 20b, 3rd drying tube 20c removes the moisture in gas, reduce the consume to follow-up precision instrument, gas flow control system, the first magnetic valve 4a, the second magnetic valve 4b, the 3rd magnetic valve 4c, the 4th magnetic valve 4d, the 5th magnetic valve 4e, the 6th magnetic valve 4f, the 7th magnetic valve 4g, the 8th magnetic valve 4h and check valve 10, on-line acquisition system, gas concentration online acquisition card 12 and PLC17 and computer 13, main adsorption and analysis device, the first adsorption tower 14a, first order Analytic Tower 14b.
This experimental provision, by the switch of PLC Controlling solenoid valve, carries out continuously with the circulation realizing methane and nitrogen separation process.Coal bed gas is after compressor boosting, and through the opening and closing of control valve, the adsorption tower of active carbon is equipped with in the inflow replaced two.When coal bed gas flows through adsorption tower, methane is tightly held by activated carbon and stays in adsorption tower, and residual gas is discharged from the upper end of adsorption tower.The flow of discharge gas is regulated by suspended body flowmeter.Resolution gas containing high concentration methane is extracted out from adsorption tower lower end by the method vacuumized, and evacuated pressure is about 20kPa.Resolution gas flow is by mass flow meter measurement.Circulation sequential is realized by Omron PLC controller.
Two tower Vacuum Pressure Swing Adsorption processes, each adsorption tower will experience pressurising, absorption, all pressure drop, vacuumizes, equal voltage rise five processing steps.Carry out absorption work with first order adsorption tower 14a, it is that example is described that first order Analytic Tower 14b carries out parsing work:
(1) pressurising: after first order adsorption tower 14a completes equal voltage rise, unstripped gas enters first order adsorption tower 14a and boosts to adsorption tower;
(2) adsorb: after first order adsorption tower 14a completes boosting, unstripped gas continues to enter adsorption tower, opens the air bleeding valve of first order adsorption tower 14a upper end simultaneously, and the gas product containing low-concentration methane flows out from adsorption tower upper end;
(3) all pressure drops: after first order adsorption tower 14a absorption reaches capacity, be communicated with by two adsorption towers, now first order adsorption tower 14a pressure reduces, and first order Analytic Tower 14b pressure raises;
(4) vacuumize: after all pressure drop terminates, vacuumize first order adsorption tower 14a, now adsorption column pressure reduces, parsed from adsorbent by the methane gas adsorbed, obtain the resolution gas containing high concentration methane, and make adsorbent reactivation, for absorption is prepared next time;
(5) two adsorption towers are communicated with, utilize the partial high pressure gas in first order Analytic Tower 14b to boost to first order adsorption tower 14a by all voltage rises: after vacuumizing.
Carry out methane adsorption work with first order adsorption tower 14a, first order Analytic Tower 14b carries out methane parsing work to describe particular flow sheet in detail.Unstripped gas is after air compressor 1 and air are made into low-concentration methane gas, flow through the first mass flowmenter 2 and demonstrate gas flow, major part gas flow through the first surge tank 3 laggard enter main body adsorption and analysis device, fraction flows into the first drying tube 20a and finally enters the first infrared analyzer 8a analytical concentration through the second pressure limiting valve 16, now the second magnetic valve 4b, 3rd magnetic valve 4c, 5th magnetic valve 4e, 7th magnetic valve 4g opens, first magnetic valve 4a, 4th magnetic valve 4d, 6th magnetic valve 4f, 8th magnetic valve 4h closes, the acticarbon absorption of gas in first order adsorption tower 14a containing low-concentration methane is purified, major part product air-flow is recorded gas pressure intensity by the first Pressure gauge 18a, through the 5th magnetic valve 4e, from check valve 10 through cushioning the 3rd drying tube 20c, flowed out by after the 3rd infrared ray gas analyzer 8c record product gas concentration, fraction gas product flows into first order Analytic Tower 14b through the 6th magnetic valve 4f, as blowback air by the methane release of charcoal absorption in first order Analytic Tower 14b out, form the resolution gas containing high concentration methane, resolution gas flows into the 3rd magnetic valve 4c, by vavuum pump 5 and after the second surge tank 6 and the second drying tube 20b of establishing, fraction resolution gas flows into the 3rd infrared gas analyzer 8c and records concentration, major part resolution gas is collected by gas collection equipment.When the charcoal absorption in first order adsorption tower 14a is saturated, active carbon in first order Analytic Tower 14b is resolved completely, by automatically switching, the 9th magnetic valve 26a in first connecting pipe 25, the tenth magnetic valve 26b in second connecting pipe 30 opens, 3rd absorption pipeline 24, 3rd resolve pipeline 29 respectively with the first buffer area A, second buffer area B is communicated with, 8th magnetic valve 4h opens, first order adsorption tower 14a is communicated with first order Analytic Tower 14b, the first buffer area A that in first order adsorption tower 14a, more anticyclonic gas is established in first order adsorption tower 14a flows through the 8th magnetic valve 4h and enters the second buffer area B established in first order Analytic Tower 14b, enter in first order Analytic Tower 14b afterwards, after air pressure balance, first connecting pipe 25, the 9th magnetic valve 26a that second connecting pipe 30 is built-in, tenth magnetic valve 26b closes, 3rd absorption pipeline 24, 3rd resolve pipeline 29 respectively with the first buffer area A, second buffer area B disconnects, 8th magnetic valve 4h closes, first magnetic valve 4a, 4th magnetic valve 4d, 5th magnetic valve 4e, 6th magnetic valve 4f opens, second magnetic valve 4b, 3rd magnetic valve 4c, 7th magnetic valve 4g closes, first order adsorption tower 14a carries out methane parsing work, first order Analytic Tower 14b carries out methane adsorption work, periodic duty is until the beginning that circulates next time.
Secondary, three grades of even level Four concentration lifting devices are progressively entered by the methane gas promoted, carry out further concentration lifting, as requested, 3-4 level concentration lifting device is set, tail gas enters device for recovering tail gas, and when methane concentration is more than 0.1%, tail gas will be circulated to one-level methane cycle device, again carry out methane pressure-variable adsorption, improve the adsorption efficiency of methane.
The present invention adopt containing in low concentration separation absorption device, Adsorption Concentration principle be utilize specific surface is high, hole is flourishing active carbon under certain pressure and temperature to low-concentration methane and other components as N
2and O
2characterization of adsorption different, and methane is wherein carried out adsorbing separation.Because the adsorbent-active carbon selected compares N to the adsorption capacity of methane
2, O
2greatly, so methane is attracted on adsorbent, and the gas product removing methane is discharged by evacuation port as the emission gases of cleaning.Under vacuum conditions, methane is resolved formation resolution gas and is collected by rearmounted gas collector by saturated active carbon, and active carbon characterization of adsorption in the process of vacuum analysis methane is also replied, for next round absorption runs ready.
The system control mode of apparatus of the present invention is divided into manual and automatic two kinds, and manual mode is applicable to the debugging, maintenance etc. of equipment.Automated manner both can deduct the difficult problem simultaneously controlling many valves in pressure-swing absorption process, deducts loaded down with trivial details operation, and the sight that two tower absorption of automatically switching are resolved, and improves automatization level.Methane adsorption separation control device is by online acquisition card 12 by all data acquisitions, and through electrical signal transfer to computer 13, computer sends instruction to PLC17, and situation is resolved in the absorption automatically controlling each electromagnetic valve switch and two king-towers.This control device possess skills advanced person, stable and reliable operation, data acquisition promptly and accurately, the advantage such as instruction issuing and execution is in time, equipment quality is durable in use, the hommization of data acquisition and control interface.
For ensureing the stable operation of this device security and preventing the generation of contingency, the present invention at each control point particularly air inlet place, be separated before and after absorption the first surge tank 3, second surge tank 6, the 3rd surge tank 11 be set, check valve 10 and pressure limiting valve 16; When after the safe pressure value scope that device internal pressure pre-sets more than the first Pressure gauge 18a and the second Pressure gauge 18b; will automatic alarm security of operation control program; reduce device interior pressure protect equipment safety operation, or directly automatic cut-off power cessation reaction is carried out.At factory building, inner and key position installs sensing methane concentration device, and when there is methane leakage, sensing methane concentration device can trigger protection device such as ventilating system in time, simultaneously to device alarm signal, takes corresponding measure with alert.
Detailed description of the invention
In normal pressure, 25-35 DEG C absorption, evacuated pressure is that 20kPa carries out vacuum analysis, gas flow is under the condition of 500sccm, absorption in different absorption Analytic Towers, resolve ratio 1:4,1:9 and 1:12 of pipe diameter and total length, adsorption tower resolve in absorption, resolving pipeline, gentle to rush filling raw material specific area region in be 600-800m
2/ g reaches 1000-2500m through modified specific area
2the active carbon of/g, carries out pressure-variable adsorption, and arranges 3-4 level concentration lifting device according to actual conditions, promotes step by step methane concentration.
Specific embodiment 1. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:4, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 0.10%, first order imported raw material gas methane concentration is 0.10%, and the resolution gas concentration that first order Analytic Tower flows out is 2.88%, and the gas product concentration that first order adsorption tower flows out is 0.02%; Second level imported raw material gas methane concentration is 2.88%, the resolution gas concentration that second level Analytic Tower flows out is 17.92%, the gas product concentration that second level adsorption tower flows out is 0.21%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 17.92%, the resolution gas concentration that third level Analytic Tower flows out is 47.81%, the gas product concentration that third level adsorption tower flows out is 0.36%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Fourth stage imported raw material gas methane concentration is 47.81%, the resolution gas concentration that fourth stage Analytic Tower flows out is 78.86%, the gas product concentration that fourth stage adsorption tower flows out is 0.43%, fourth stage gas product enters waste gas recovering device and reclaims, backflow enters first order concentration lifting device, finally enters the methane concentration of air lower than 0.02%; The organic efficiency of methane is 95.12%.
Specific embodiment 2. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:9, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 0.10%, first order imported raw material gas methane concentration is 0.10%, and the resolution gas concentration that first order Analytic Tower flows out is 3.12%, and the gas product concentration that first order adsorption tower flows out is 0.01%; Second level imported raw material gas methane concentration is 3.12%, the resolution gas concentration that second level Analytic Tower flows out is 19.26%, the gas product concentration that second level adsorption tower flows out is 0.15%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 19.26%, the resolution gas concentration that third level Analytic Tower flows out is 56.95%, the gas product concentration that third level adsorption tower flows out is 0.27%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Fourth stage imported raw material gas methane concentration is 56.95%, the resolution gas concentration that fourth stage Analytic Tower flows out is 82.32%, the gas product concentration that fourth stage adsorption tower flows out is 0.38%, fourth stage gas product enters waste gas recovering device and reclaims, backflow enters first order concentration lifting device, finally enters the methane concentration of air lower than 0.01%; Methane recovery efficiency is 96.56%.
Specific embodiment 3. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:12, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 0.10%, first order imported raw material gas methane concentration is 0.10%, and the resolution gas concentration that first order Analytic Tower flows out is 3.02%, and the gas product concentration that first order adsorption tower flows out is 0.02%; Second level imported raw material gas methane concentration is 3.02%, the resolution gas concentration that second level Analytic Tower flows out is 18.63%, the gas product concentration that second level adsorption tower flows out is 0.19%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 18.63%, the resolution gas concentration that third level Analytic Tower flows out is 51.41%, the gas product concentration that third level adsorption tower flows out is 1.28%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters second level adsorption tower; Fourth stage imported raw material gas methane concentration is 51.41%, the resolution gas concentration that fourth stage Analytic Tower flows out is 79.95%, the gas product concentration that fourth stage adsorption tower flows out is 0.38%, fourth stage gas product enters waste gas recovering device and reclaims, backflow enters first order concentration lifting device, finally enters the methane concentration of air lower than 0.02%; The organic efficiency of methane is 95.82%.
Specific embodiment 4. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 15kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:4, uses 2500m
2the modified activated carbon of/g is 0.50% as feed gas methane concentration under the condition of adsorbent, and first order imported raw material gas methane concentration is 0.50%, and the resolution gas concentration that first order Analytic Tower flows out is 4.32%, and the gas product concentration that first order adsorption tower flows out is 0.02%; Second level imported raw material gas methane concentration is 4.32%, the resolution gas concentration that second level Analytic Tower flows out is 27.66%, the gas product concentration that second level adsorption tower flows out is 0.09%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 27.66%, the resolution gas concentration that third level Analytic Tower flows out is 71.69%, the gas product concentration that third level adsorption tower flows out is 0.26%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.02%; The organic efficiency of methane is 96.44%.
Specific embodiment 5. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:9, uses 2500m
2the modified activated carbon of/g is 0.50% as feed gas methane concentration under the condition of adsorbent, and first order imported raw material gas methane concentration is 0.50%, and the resolution gas concentration that first order Analytic Tower flows out is 4.86%, and the gas product concentration that first order adsorption tower flows out is 0.01%; Second level imported raw material gas methane concentration is 4.86%, the resolution gas concentration that second level Analytic Tower flows out is 30.42%, the gas product concentration that second level adsorption tower flows out is 0.07%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 30.42%, the resolution gas concentration that third level Analytic Tower flows out is 74.55%, the gas product concentration that third level adsorption tower flows out is 0.21%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters second level adsorption tower; Finally enter the methane concentration of air lower than 0.01%; The organic efficiency of methane is 97.30%.
Specific embodiment 6. is in normal pressure, 25 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:12, uses 2500m
2the modified activated carbon of/g is 0.50% as feed gas methane concentration under the condition of adsorbent, and first order imported raw material gas methane concentration is 0.50%, and the resolution gas concentration that first order Analytic Tower flows out is 4.55%, and the gas product concentration that first order adsorption tower flows out is 0.03%; Second level imported raw material gas methane concentration is 4.55%, the resolution gas concentration that second level Analytic Tower flows out is 29.31%, the gas product concentration that second level adsorption tower flows out is 0.08%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 29.31%, the resolution gas concentration that third level Analytic Tower flows out is 72.86%, the gas product concentration that third level adsorption tower flows out is 0.23%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.03%; The organic efficiency of methane is 96.93%.
Specific embodiment 7. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:4, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 1.00%, first order imported raw material gas methane concentration is 1.00%, and the resolution gas concentration that first order Analytic Tower flows out is 19.12%, and the gas product concentration that first order adsorption tower flows out is 0.05%; Second level imported raw material gas methane concentration is 19.12%, the resolution gas concentration that second level Analytic Tower flows out is 65.23%, the gas product concentration that second level adsorption tower flows out is 0.33%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 65.23%, the resolution gas concentration that third level Analytic Tower flows out is 84.88%, the gas product concentration that third level adsorption tower flows out is 0.41%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters second level adsorption tower; Finally enter the methane concentration of air lower than 0.05%; The organic efficiency of methane is 98.25%.
Specific embodiment 8. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:9, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent; feed gas methane concentration is 1.00%; first order imported raw material gas methane concentration is 1.00%, and the resolution gas concentration that first order Analytic Tower flows out is 20.32%, and the gas product concentration that first order adsorption tower flows out is 0.03%; The gas product concentration that second level adsorption tower flows out is 20.32%, the resolution gas concentration that second level Analytic Tower flows out is 70.36%, the gas product concentration that second level adsorption tower flows out is 0.29%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 70.36%, the resolution gas concentration that third level Analytic Tower flows out is 86.69%, the gas product concentration that third level adsorption tower flows out is 0.35%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.03%; The organic efficiency of methane is 98.96%.
Specific embodiment 9. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:12, uses 1000m
2the modified activated carbon of/g is as under the condition of adsorbent; feed gas methane concentration is 1.00%; first order imported raw material gas methane concentration is 1.00%, and the resolution gas concentration that first order Analytic Tower flows out is 18.75%, and the gas product concentration that first order adsorption tower flows out is 0.06%; The gas product concentration that second level adsorption tower flows out is 18.75%, the resolution gas concentration that second level Analytic Tower flows out is 59.85%, the gas product concentration that second level adsorption tower flows out is 0.35%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 59.85%, the resolution gas concentration that third level Analytic Tower flows out is 83.91%, the gas product concentration that third level adsorption tower flows out is 0.43%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.06%; The organic efficiency of methane is 97.47%.
Specific embodiment 10. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:4, uses 2500m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 5.00%, first order imported raw material gas methane concentration is 5.00%, and the resolution gas concentration that first order Analytic Tower flows out is 36.52%, and the gas product concentration that first order adsorption tower flows out is 0.02%; Second level imported raw material gas methane concentration is 36.52%, the resolution gas concentration that second level Analytic Tower flows out is 83.38%, the gas product concentration that second level adsorption tower flows out is 0.31%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 83.38%, the resolution gas concentration that third level Analytic Tower flows out is 96.75%, the gas product concentration that third level adsorption tower flows out is 0.40%, third level gas product enters waste gas recovering device and reclaims, and backflow enters the backflow of first order concentration lifting device and enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.02%; The organic efficiency of methane is 99.36%.
Specific embodiment 11. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:9, uses 2500m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 5.00%, first order imported raw material gas methane concentration is 5.00%, and the resolution gas concentration that first order Analytic Tower flows out is 39.76%, and the gas product concentration that first order adsorption tower flows out is 0.01%; Second level imported raw material gas methane concentration is 39.76%, the resolution gas concentration that second level Analytic Tower flows out is 87.21%, the gas product concentration that second level adsorption tower flows out is 0.25%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 87.21%, the resolution gas concentration that third level Analytic Tower flows out is 99.88%, the gas product concentration that third level adsorption tower flows out is 0.36%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.01%; The organic efficiency of methane is 99.99%.
Specific embodiment 12. is in normal pressure, 35 DEG C of absorption, and evacuated pressure is that 20kPa carries out vacuum analysis, and gas flow is 500sccm, and adsorption tower adsorbs, resolves pipe diameter and total length ratio in resolving is 1:12, uses 2500m
2the modified activated carbon of/g is as under the condition of adsorbent, feed gas methane concentration is 5.00%, first order imported raw material gas methane concentration is 5.00%, and the resolution gas concentration that first order Analytic Tower flows out is 35.85%, and the gas product concentration that first order adsorption tower flows out is 0.03%; Second level imported raw material gas methane concentration is 35.85%, the resolution gas concentration that second level Analytic Tower flows out is 80.38%, the gas product concentration that second level adsorption tower flows out is 0.34%, and second level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Third level imported raw material gas methane concentration is 80.38%, the resolution gas concentration that third level Analytic Tower flows out is 94.43%, the gas product concentration that third level adsorption tower flows out is 0.41%, and third level gas product enters waste gas recovering device and reclaims, and backflow enters first order concentration lifting device; Finally enter the methane concentration of air lower than 0.03%; The organic efficiency of methane is 99.04%.
Claims (2)
1. a ultralow concentration gas efficiently concentrating separation equipment, is characterized in that: this equipment first order concentration lifting device comprises: air compressor (1), first mass flowmenter (2), second mass flowmenter (7), the first surge tank (3), second surge tank (6), 3rd surge tank (11), the first magnetic valve (4a), second magnetic valve (4b), 3rd magnetic valve (4c), 4th magnetic valve (4d), 5th magnetic valve (4e), 6th magnetic valve (4f), 7th magnetic valve (4g), 8th magnetic valve (4h), vavuum pump (5), the first infrared gas analyzer (8a), second infrared gas analyzer (8b), 3rd infrared gas analyzer (8c), the first pressure limiting valve (9), second pressure limiting valve (16), check valve (10), capture card (12), computer (13), first order adsorption tower (14a), first order Analytic Tower (14b), spinner flowmeter (15), PLC (17), the first Pressure gauge (18a), second Pressure gauge (18b), 3rd Pressure gauge (18c), 4th Pressure gauge (18d), the first liquid measure display instrument (19a), second liquid measure display instrument (19b), the first drying tube (20a), second drying tube (20b), 3rd drying tube (20c) and vacuum display instrument (21),
The second level, the third level and fourth stage concentration lifting device are identical with installation site with first order concentration lifting device equipment composition;
Described first order adsorption tower (14a) internal structure is: comprise and being made up of the pipeline of the first absorption pipeline (22), the second absorption pipeline (23), the S-shaped series connection of the 3rd absorption pipeline (24) three segment pipe and the first buffer area A; Adsorbent activity carbon is placed with in pipeline, beyond pipeline, adsorption tower is the first buffer area A with inner region, first buffer area A and the 3rd is adsorbed pipeline (24) and is connected by the first connecting pipe (25), is provided with the 9th magnetic valve (26a) in the first connecting pipe (25); First order Analytic Tower (14b) internal structure is: comprise and resolve by first the pipeline that pipeline (27), second resolves pipeline (28), the S-shaped series connection of the 3rd parsing pipeline (29) three segment pipe, adsorbent activity carbon is placed with in pipeline, beyond pipeline, adsorption tower is the second buffer area B with inner region, second buffer area B and the 3rd is resolved pipeline (29) and is connected by the second connecting pipe (30), is provided with the tenth magnetic valve (26b) in the second connecting pipe (30);
Wherein, described air compressor (1) is through described first mass flowmenter (2) and the first surge tank (3) series winding, and described first surge tank (3) is connected with the lower end of first order adsorption tower (14a) with first order Analytic Tower (14b) respectively by the second magnetic valve (4b), the 4th magnetic valve (4d); The gas circuit that described first surge tank (3) and the first drying tube (20a), the second pressure limiting valve (16) and the first infrared gas analyzer (8a) form is contacted; Described first magnetic valve (4a), the 3rd magnetic valve (4c) connect the lower end of first order adsorption tower (14a) and first order Analytic Tower (14b) respectively, and are connected with the second magnetic valve (4b), the 4th magnetic valve (4d); Described first order adsorption tower (14a) is connected by the 8th magnetic valve (4h) with in the middle part of first order Analytic Tower (14b) tower body; Be connected with vavuum pump (5), the second surge tank (6), the second drying tube (20b), the second mass flowmenter (7), the second infrared gas analyzer (8b) successively after described first magnetic valve (4a), the 3rd magnetic valve (4c) are parallel with one another; Described second infrared gas analyzer (8b) end resolution gas gas outlet is connected with second level concentration lifting device unstripped gas air inlet; The resolution gas outlet side of described second level concentration lifting device is connected with third level concentration lifting device unstripped gas air inlet; The resolution gas outlet side of described third level concentration lifting device is connected with fourth stage concentration lifting device unstripped gas air inlet; Described first order adsorption tower (14a) upper end is connected with the first Pressure gauge (18a) with the 5th magnetic valve (4e); Described first order Analytic Tower (14b) upper end is connected with the second Pressure gauge (18b) with the 6th magnetic valve (4f); Described first Pressure gauge (18a) is connected by the 7th magnetic valve (4g) with the second Pressure gauge (18b), is connected after described 5th magnetic valve (4e) is in parallel with the 6th magnetic valve (4f) with check valve (10) leading portion; Described check valve (10) rear end is connected with the 3rd surge tank (11) leading portion; Described 3rd surge tank (11) is connected with the 3rd drying tube (20c), the first pressure limiting valve (9), spinner flowmeter (15), the 3rd infrared gas analyzer (8c) successively; Described 3rd infrared gas analyzer (8c) end prod gas gas outlet connects device for recovering tail gas; Described device for recovering tail gas is connected with first order concentration lifting device unstripped gas inlet end;
Described first mass flowmenter (2), second gauge (7) are connected with computer (13); Be placed in first order adsorption tower (14a) to be connected with the 4th Pressure gauge (18d) with the 3rd Pressure gauge (18c) of first order Analytic Tower (14b) lower end; Described first magnetic valve (4a), the second magnetic valve (4b), the 3rd magnetic valve (4c), the 4th magnetic valve (4d), the 5th magnetic valve (4e), the 6th magnetic valve (4f), the 7th magnetic valve (4g), the 8th magnetic valve (4h), the 9th magnetic valve (26a), the tenth magnetic valve (26b) are connected with PLC (17); Described PLC (17) is connected with computer (13) with after online acquisition card (12) series connection.
2. a kind of ultralow concentration gas efficiently concentrating separation equipment according to claim 1, is characterized in that: in adsorption tower or Analytic Tower, the pipe diameter of S-shaped serial pipe and total length ratio are 1:4 ~ 1:12.
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| CN108659904B (en) * | 2018-06-05 | 2021-01-19 | 中国矿业大学(北京) | Methane dry-method desulphurization device |
| CN110452748B (en) * | 2019-07-12 | 2020-12-04 | 煤科集团沈阳研究院有限公司 | Physical extraction and enrichment system for coal bed gas |
| CN112439299B (en) * | 2020-11-18 | 2022-08-02 | 四川华蓥山煤层气发电有限责任公司 | Gas purification device for gas power generation and use method thereof |
| CN114166778B (en) * | 2021-12-08 | 2023-08-18 | 中国矿业大学 | Infrared characteristic-based coal methane adsorption capability test method |
| CN116966718B (en) * | 2023-08-21 | 2024-05-24 | 河南平煤神马聚碳材料有限责任公司 | Novel PSA replacement equipment for CO purification |
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