CN209530468U - A kind of pressure swing adsorption system with jet stream desorption - Google Patents
A kind of pressure swing adsorption system with jet stream desorption Download PDFInfo
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- CN209530468U CN209530468U CN201821737493.7U CN201821737493U CN209530468U CN 209530468 U CN209530468 U CN 209530468U CN 201821737493 U CN201821737493 U CN 201821737493U CN 209530468 U CN209530468 U CN 209530468U
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Abstract
The utility model provides a kind of pressure swing adsorption system with jet stream desorption, the system comprises sequentially connected compression unit, absorbing unit, gas collection unit and desorption units, wherein desorption unit includes Pneumatic booster device, first air inlet of Pneumatic booster device is connect with the gas outlet of compressed gas pipeline, and the second air inlet is all connected with the gas outlet of the first adsorption tower and the gas outlet of the second adsorption tower.The utility model in the desorption unit of pressure swing adsorption system by being embedded in Pneumatic booster device, the desorption negative pressure formed in Pneumatic booster device using compressed gas, cooperate a small amount of product gas flushing even without using product gas flushing, it can realize the thorough desorption and regeneration of adsorbent, reduce the consumption of product gas flushing, equipment investment and operating cost are reduced, the cycle of operation is shortened, the overall efficiency of system greatly improved.
Description
Technical field
The utility model belongs to gas separation field, is related to a kind of pressure swing adsorption system more particularly to a kind of band jet stream solution
The pressure swing adsorption system of suction.
Background technique
Oxygen and nitrogen are obtained as basis property industrial gasses in fields such as aerospace, medication chemistry and food and medicines
It is widely applied.Contain a large amount of oxygen and nitrogen in air, it is different using the physical property of each component in air, it can be by each component
Separation is to achieve the effect that purification.Current most representative spatial division technology includes: cryogenic separation method, pressure swing adsorption method and film point
From method.Wherein, pressure swing adsorption method (PSA) is that one kind is important, has widely applied gas separating method, is low-temperature deep sky
The important supplement of division technique, for being generallyd use by the traditional PSA method of air stream production oxygen such as CaA, CaX, NaX or LiX type
Equal nitrogen absorbers (also known as molecular sieve) is based on equilibrium adsorption theory oxygen, can oxygen producing concentration about 93% product gas, and use
Carbon molecular sieve such as is generallyd use in the traditional PSA method by air stream production nitrogen and is based on dynamics stalling characteristic nitrogen, or even can
Single -step method produces purity up to 99.9995% or more high pure nitrogen, wherein oxygen either processed or nitrogen processed, either single stage adsorption
Or complicated twin-stage absorption or multi-stage absorption, in general, nothing more than having single column, double tower, three towers even multitower adsorbing separation work
Skill, regardless of be which kind of adsorptive separation technology, the circulation all at least experience being adsorbed and desorb different by the stage of adsorbing separation
Process, desorption process especially therein, it is necessary to thoroughly by the gas of absorption (also known as easy adsorbed gas), thoroughly regeneration is clean,
The starting point of sorption cycle is returned to, the circulation of adsorbing separation process could effectively be maintained efficiently to carry out.
In general, the on-line regeneration method of adsorbent (molecular sieve) mainly there are several types of:
1, it heating, system combination temp.-changing adsorption designs, i.e., adsorbent (molecular sieve) is heated to certain temperature, so that
The gas of absorption effectively escapes, and excludes to outside system.
2, decompression regeneration, and be divided into being reduced to atmospheric pressure (normal pressure) or being pumped to vacuum pump under certain vacuum pressure and make
The partial pressure for obtaining the gas (also known as easy adsorbed gas) being adsorbed in adsorbent gas phase is adsorbed gas lower than in adsorbent pores and surface
The partial pressure of body (also known as easy adsorbed gas), so that adsorbate (also known as easy adsorbed gas) can be escaped effectively, side by side
In addition to system, the former is designed as normal pressure desorption (PSA), or is then vacuum desorption (also known as VSA, VPSA).
3, product gas rinses, and rinses adsorbent bed, further drop using product gas (or crying difficult adsorbed gas)
The partial pressure for the gas (also known as easy adsorbed gas) being adsorbed in low adsorption agent gas phase keeps adsorbent pores interior and surface adsorbate
(also known as easy adsorbed gas) can be escaped effectively, and be excluded to outside system.
CN202620982U discloses a kind of pressure-variable adsorption of the separation containing hydrogen and chlorosilane and/or chlorine hydride mixed gas body
System uses vacuum including vacuum pump, equalizer tank, adsorption tower, pipeline and the sequencing valve being arranged on each pipeline in desorption system
Pump carries out adsorption tower to vacuumize regeneration, and to carry out next absorption, the system is high, applied widely with the rate of recovery and uses
The advantages that service life is long, however need to be additionally provided vacuum pump in desorption process, the operating cost and energy consumption of device are increased, is passed through
Benefit of helping and environmental benefit are lower.
CN102091500A discloses a kind of method and apparatus of the oxygen nitrogen combined separation of pressure-variable adsorption, is particularly suitable for flying
Row device uses, which includes at least two adsorption towers for being filled with adsorbent and a set of take out adsorbent oxygen
Pneumatic vacuum equipment etc., the driving power using the compressed air obtained under flight attitude as Pneumatic vacuum equipment makes to inhale
Attached tower internal cause pressure reduction, adsorbent discharge oxygen and regenerate adsorbent, can further improve the installation of whole system
Volume and the aggregate resource for optimizing airborne equipment, however the documents still solution noise not yet in effect the problems such as.
Air compressor work is directly utilized in a kind of air separation and adsorption system disclosed in CN201132098Y, the system
The negative pressure of vacuum generated afterwards desorbs residual gas in adsorption tower, eliminates huge vacuum pump system, reduces function
Rate consumption, reduces operating cost, has achieved the effect that energy-saving and emission-reduction.It is made an uproar however, it is not provided with muffler with eliminating fluid
Sound is also easy to produce noise pollution, while this application file only discloses an adsorption tower, causes production process that can not be carried out continuously,
Reduce the operational efficiency of equipment.
Currently, in several common solutions, the method for rinsing clearly most " valuableness " using product gas to the greatest extent may be used
The little waste product gas of energy is the premise of lifting system efficiency；And heat, because adsorbent heating conduction is poor, it is designed to temp.-changing adsorption
Energy consumption is high, operation cycle is long, and overall efficiency is low, it is difficult to implement；And it is depressured regeneration, it is such as designed to that normal pressure desorbs, usually needs to tie
Close and adsorbent thoroughly regenerated purpose can be only achieved using the flushing of larger amount of product gas, product gas consumption is big, efficiency compared with
It is low, and use vacuum desorption, thoroughly have its apparent advantage in terms of regeneration meeting adsorbent, without product gas flushing or
It is rinsed in conjunction with a small amount of product gas and can reach thorough regenerated purpose, comprehensive regeneration efficiency is high, but faced by vacuum equipment
The problems such as engineering challenge such as noise, is still difficult to solve at present, in addition, being influenced by objective factors such as field conditions, such as installs
The problems such as site area is limited, it tends to be difficult to directly adopt vacuum pump, therefore, be badly in need of a kind of occupied area it is small and have enough reason
The alternative solution of the economic benefit and environmental benefit thought.
Utility model content
For adsorbent existing in the prior art desorption is not thorough, product gas consumption is big, desorption efficiency is low and needs
Additional the problems such as increasing vaccum-pumping equipment, the utility model provide a kind of pressure swing adsorption system with jet stream desorption, the system
System is come by force with compressed gas in the negative pressure that Pneumatic booster device portal is formed by being embedded in Pneumatic booster device in desorption circuit
The desorption efficiency for changing pressure-variable adsorption, not only eliminates the vacuum equipment of the valuableness such as vacuum pump, but also considerably reduce product gas
The consumption of flushing improves the overall operation efficiency and production efficiency of system.
For this purpose, the utility model uses following technical scheme:
The utility model provides a kind of pressure swing adsorption system, and the system comprises sequentially connected compression units, absorption
Unit, desorption unit and gas collection unit；
Compression unit, including compression set；
Absorbing unit, including the first adsorption tower and the second adsorption tower in parallel；
Gas collection unit, including gas collector；
Desorption unit, including Pneumatic booster device, the Pneumatic booster device include the first air inlet, the second air inlet,
First gas outlet and the second gas outlet, the first air inlet are connected to the first gas outlet, and the second air inlet is connected to the second gas outlet；
First air inlet is connect with the gas outlet of compressed gas pipeline, the gas outlet of the second air inlet and the first adsorption tower and
The gas outlet of second adsorption tower is all connected with.
Those skilled in the art will be appreciated that compression unit described in the utility model further includes the gas connecting with compression set
Body buffer unit.
The compression unit further includes feed back loop, and wherein feed back loop includes to selectivity by compressed original
Material pneumatic transmission enters the switch valve and necessary pipeline of adsorption tower.
The gas collection unit further includes product gas output loop, and product gas output loop includes to selectivity
The switch valve and necessary pipeline that adsorption tower is connected to gas collector.
The desorption unit further includes desorption circuit and product gas flush loop, wherein desorption circuit includes to select
The switch valve and necessary pipeline for connecting adsorption tower and atmosphere of selecting property, product gas flush loop include individually to select
The switch valve that adsorption tower is connected with product gas surge tank and necessary pipeline of property.
Since the improvement of the utility model does not lie in the compression unit, absorbing unit and gas collection unit, herein
It does not repeat.Such as the connection relationship of each component can be in the pressure swing adsorption system are as follows:
Compression set is connected with gas buffer, gas buffer by feed back loop respectively with the first adsorption tower and
Second adsorption tower is connected, and the first adsorption tower is connected in parallel with the second adsorption tower by switch valve and necessary pipeline, and first inhales
Attached tower and the second adsorption tower are connected by product gas output loop with gas collector, and the first adsorption tower and the second adsorption tower are logical
Desorption circuit is crossed to be connected with atmosphere.
The operational process of the pressure swing adsorption system are as follows:
Unstripped gas enters absorbing unit after compression unit compresses, and is adsorbed under adsorptive pressure, produces gas and export extremely
Gas collector introduces compressed gas to Pneumatic booster device from gas buffer or external compressed air source, is solving
It sucks back and forms desorption negative pressure in road, realize the desorption and regeneration to adsorbent in adsorption tower.
Those skilled in the art will be appreciated that the conventional flowsheet of pressure swing adsorption system are as follows:
Compression unstripped gas from compressor initially enters cooling driers removing moisture, subsequently by more adsorption tower groups
At absorbing unit, selectively adsorb the strong absorbed component in mixed gas using the adsorbent loaded in tower, and more difficult suction
Attached component is discharged and is collected by tower top as product gas.For the desorption and regeneration for realizing adsorbent in adsorption tower, it is generally the case that
It can be heated up, be depressured or the operation such as product gas flushing to adsorbent, but since the heating conduction of most adsorbents is poor, be passed through
Heating up, the energy consumption desorbed is higher, and the cycle of operation is longer, and overall efficiency is low, it is difficult to industrial applications；It is rushed by product gas
It washes, large-tonnage product gas can be consumed, largely effect on the production efficiency of system；Adsorbent is being met thoroughly in life using depressurization desorption
Aspect has a clear superiority, and can reach complete regenerated purpose without product gas flushing or in conjunction with a small amount of product gas flushing,
Comprehensive regeneration efficiency is higher, but face by vacuum equipment engineering challenge such as noise pollution the problems such as be difficult to effectively solve, together
When limited by objective circumstances such as in-site installation conditions, it tends to be difficult to directly adopt the vaccum-pumping equipments such as vacuum pump.
Pressure swing adsorption system provided by the utility model is embedded in Pneumatic booster device in desorption circuit, uses compressed gas
Body strengthens the desorption process (i.e. jet stream desorption) of pressure swing adsorption system in the negative pressure that Pneumatic booster device portal is formed, wherein
Pneumatic booster device formed desorption negative pressure pressure swing adsorption system cycle period specific desorption phase synchronous working thus
It regenerates adsorbent thoroughly, reduces product gas consumption during rinsing.
As the preferred technical solution of the utility model, the outlet of the air inlet of compressed gas pipeline and the compression set
Mouthful be connected, the compressed gas that the compression set carried using pressure swing adsorption system is provided as the motive force of Pneumatic booster device,
Eliminate additional compressed air source.
As the preferred technical solution of the utility model, it is equipped with piston in the Pneumatic booster device, passes through compressed gas
Body drives the piston motion in Pneumatic booster device, realizes the purpose of product gas desorption.
As the preferred technical solution of the utility model, the driving force of the Pneumatic booster device is compressed air or compression
Unstripped gas is moved reciprocatingly with the piston in compressed air or compression unstripped gas driving supercharging device and is solved with this to product gas
It inhales, it is preferable that drive Pneumatic booster device using compression unstripped gas, eliminate additional compressed air source, save equipment investment.
As the preferred technical solution of the utility model, the first gas outlet of the Pneumatic booster device and the second outlet
Mouth is connect with muffler respectively, can effectively reduce the discharge noise of high pressure gas.
As the preferred technical solution of the utility model, the system also includes pretreatment unit, the pretreatment list
Member includes filter and cooling driers；Compressed unstripped gas enters pretreatment unit after compression unit compresses, after pretreatment,
The removing of the solid impurities such as oil, the dust in unstripped gas can be effectively removed, ensure that the long-period stable operation of system.
As the preferred technical solution of the utility model, the compression unit further includes feed back loop；The charging is returned
Road includes the switch valve and pipeline unstripped gas to be sent into the absorbing unit.
As the preferred technical solution of the utility model, the gas collection unit further includes product gas output loop；
The product gas output loop includes the switch valve the absorbing unit to be connected to the gas collection unit
And pipeline.
As the preferred technical solution of the utility model, the desorption unit further includes that desorption circuit and product gas flushing return
Road, wherein the desorption circuit includes the switch valve and necessary pipeline to connect absorbing unit and atmosphere, product
Gas flushing circuit includes individually to the switch valve that is connected to absorbing unit with the gas collection unit and necessary
Pipeline.
The general step for carrying out gas separation using pressure swing adsorption system provided by the utility model is as follows:
By compressed unstripped gas in the first adsorption tower and the second adsorption tower alternately pressure-variable adsorption and output products
Gas, and pressure-swing desorption alternately is carried out to the first adsorption tower of adsorption saturation or the second adsorption tower, obtain product gas；Wherein, described
Compressed gas-driven Pneumatic booster device is used to generate desorption negative pressure during pressure-swing desorption.
In the utility model, the compressed gas that the compression set that can be used pressure swing adsorption system included generates increases as pneumatic
The gas-powered power of pressure device, eliminates additional compressed air source, and compressed gas enters Pneumatic booster through the first air inlet and fills
It sets and is expelled to atmosphere through the first gas outlet, driving fluid enters through the second air inlet, is expelled to atmosphere through the second gas outlet.
Compared with prior art, the utility model has the following beneficial effects:
1, the utility model in the desorption circuit of pressure swing adsorption system by being embedded in Pneumatic booster device, Pneumatic booster dress
The specific desorption phase that the desorption negative pressure to be formed is set in pressure swing adsorption system cycle period works asynchronously, and can not add vacuum
The desorption and regeneration to adsorbent is realized on the basis of the vaccum-pumping equipments such as pump, and only needs to cooperate a small amount of product gas flushing even nothing
It need to be rinsed using product gas, improve the production efficiency of system, reduced equipment investment and shorten the cycle of operation.
2, the Pneumatic booster device of the utility model reduces high pressure gas also by the muffler of external special designing
Discharge noise.
3, the included compression dress of pressure swing adsorption system can be selected in the motive force for the Pneumatic booster device that the utility model uses
The compressed gas for setting offer fills traditional pressure swing adsorption system and Pneumatic booster without being additionally provided new compressed air source
It sets and is highly coupled, reduce the volume and occupied area of system, reduce equipment investment and operating cost, greatly improve
The integrated level of system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the pressure swing adsorption system with jet stream desorption in the utility model embodiment 1.
Fig. 2 is the structural schematic diagram of the pressure swing adsorption system with jet stream desorption in the utility model embodiment 2.
Wherein: AB01- compressor, AF01- first filter, the second filter of AF02-, AF03- third filter,
TC01- cooling driers, the first adsorption tower of 101A-, the second adsorption tower of 101B-, PV101- gas buffer tank, PV102- gas collection
Tank, 102- Pneumatic booster device, the first muffler of XYQ100-, the second muffler of XYQ102-, the first switching valve of QDV100-,
The second switching valve of QDV101A-, QDV101B- third switching valve, the 4th switching valve of QDV102A-, the 5th switching valve of QDV102B-,
The 6th switching valve of QDV103A-, the 7th switching valve of QDV103B-, the 8th switching valve of QDV104A-, the 9th switching valve of QDV104B-,
The tenth switching valve of QDV105A-, the 11st switching valve of QDV105B-, the 12nd switching valve of QDV105C-, JV105- the 13rd are cut
Change valve, the 14th switching valve of JV02-.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
Present embodiments provide a kind of pressure swing adsorption system with jet stream desorption, pressure swing adsorption system as shown in Fig. 1
Including sequentially connected compression unit, absorbing unit, desorption unit and gas collection unit；
Compression unit, including compressor AB01 and gas buffer tank PV101 connected to it；
Absorbing unit, including the first adsorption tower 101A and the second adsorption tower 101B, wherein the first adsorption tower 101A passes through
8th switching valve QDV104A and the 9th switching valve QDV104B and the second adsorption tower 101B is connected in parallel；
Gas collection unit, including gas collection tank PV102；
Desorption unit, including Pneumatic booster device 102, the Pneumatic booster device include the first air inlet A, the first outlet
Mouth B, the second air inlet C and the second gas outlet D, the first A mouthfuls of air inlet are connected to the first gas outlet B, the second air inlet C and second
Gas outlet D connection；
First air inlet A of Pneumatic booster device passes through the outlet of the first switching valve QDV100 and gas buffer tank PV101
Mouthful connection, the second air inlet C by the 4th switching valve QDV102A and the 5th switching valve QDV102B respectively with the first adsorption tower
The gas outlet of 101A and the second adsorption tower 101B are connected.
First gas outlet B of Pneumatic booster device has also accessed the first muffler XYQ100, and the second gas outlet D is also accessed
The second muffler XYQ102.
The compression unit further includes feed back loop, and wherein feed back loop includes to selectivity by compressed original
Material pneumatic transmission enters the necessary pipeline and the second switching valve QDV101A and third switching valve QDV101B of adsorption tower.
The gas collection unit further includes product gas output loop, and product gas output loop includes to selectivity
The necessary pipeline and the 6th switching valve QDV103A and the 7th switching valve QDV103B that adsorption tower is connected to gas collection tank.
The desorption unit further includes desorption circuit and product gas flush loop, wherein desorption circuit includes to select
The necessary pipeline and the 4th switching valve QDV102A and the 5th switching valve by adsorption tower and atmosphere or connection of selecting property
QDV102B, product gas flush loop include individually to selective necessity that adsorption tower is connected with product gas surge tank
Pipeline and the tenth switching valve QDV105A, the 11st switching valve QDV105B and the 12nd switching valve QDV105C.
The system also includes pretreatment unit, the pretreatment unit include sequentially connected first filter AF01,
Cooling driers TC01, the second filter AF02 and third filter AF03.
The operational process of the pressure swing adsorption system are as follows:
Unstripped gas enters absorbing unit after compression unit compresses, and is adsorbed, is produced under the adsorptive pressure of 0.015MPa
Gas is simultaneously exported to gas collector, introduces compressed gas to Pneumatic booster device, in desorption circuit from gas buffer
The desorption negative pressure of formation -0.08MPa realizes the desorption and regeneration to adsorbent in adsorption tower.
Using the method for the above-mentioned pressure swing adsorption system separation air with pneumatic device, step includes:
(1) air exports after compressor AB01 compression to gas buffer tank PV101, then sequentially through first filter
After AF01, cooling driers TC01, the second filter AF02 and third filter AF03 except deoil, the solid impurities such as dust；
(2) the second switching valve QDV101A, the 6th switching valve QDV103A and the 14th switching valve JV02 are opened, compression is empty
Gas enters the first adsorption tower 101A equipped with zeolite adsorbents, is adsorbed under the adsorptive pressure of 0.015MPa, produces gas and defeated
Out to gas collection tank PV102；
After (3) first adsorption tower 101A adsorption saturations, the second switching valve QDV101A is closed, compressed air stops entering the
One adsorption tower 101A opens the 8th switching valve QDV104A and the 9th switching valve QDV104B, by the first adsorption tower 101A and second
Adsorption tower 101B connection, the first adsorption tower 101A and the second adsorption tower 101B of adsorption saturation carry out one or many exchange to return
Receive necessary component and the energy；
(4) the tenth switching valve QDV105A, the 12nd switching valve QDV105C and the 13rd switching valve JV105 are opened, is used
Product gas is rinsed the first adsorption tower 101A, the first switching valve QDV100 and the 4th switching valve QDV102A is opened, by gas
Compressed air in body surge tank PV101 introduces Pneumatic booster device 102, and the desorption for desorbing generation -0.08MPa in circuit is negative
Pressure carries out desorption and regeneration to the adsorbent in the first adsorption tower 101A；
(5) third switching valve QDV101B, the 7th switching valve QDV103B and the 14th switching valve JV02 are opened, compression is empty
Gas enters the second adsorption tower 101B equipped with LiX zeolite adsorbents, is adsorbed under the adsorptive pressure of 0.015MPa, produces gas simultaneously
It exports to gas collection tank PV102；
After (6) second adsorption tower 101B adsorption saturations, third switching valve QDV101B is closed, compressed air stops entering the
Two adsorption tower 101B open the 8th switching valve QDV104A and the 9th switching valve QDV104B for the first adsorption tower 101A and second
Adsorption tower 101B connection, the second adsorption tower 101B and the first adsorption tower 101A of adsorption saturation carry out one or many exchange to return
Receive necessary component and the energy；
(7) the 11st switching valve QDV105B, the 12nd switching valve QDV105C and the 13rd switching valve JV105 are opened, is made
The second adsorption tower 101B is rinsed with product gas, opens the first switching valve QDV100 and the 5th switching valve QDV102B, it will
Compressed air in gas buffer tank PV101 introduces Pneumatic booster device 102, desorbs the desorption of generation -0.08MPa in circuit
Negative pressure carries out desorption and regeneration to the adsorbent in the second adsorption tower 101B；
(8) first adsorption tower 101A and the second adsorption tower 101B out-phase sequence are run, and repeat above-mentioned separating step, constantly
The separation of oxygen nitrogen can be realized in circulation, and output purity is 93%, and pressure is the high pressure oxygen of 3.5MPa.
Remaining valve of above-mentioned steps in addition to the switching valve of specified unlatching is in closed state.
Embodiment 2
Present embodiments provide a kind of pressure swing adsorption system with jet stream desorption, pressure swing adsorption system as shown in Fig. 2
Including sequentially connected compression unit, absorbing unit, desorption unit and gas collection unit；
Compression unit, including compressor AB01 and the gas buffer tank PV101 being connect with compressor；
Absorbing unit, including the first adsorption tower 101A and the second adsorption tower 101B, wherein the first adsorption tower 101A passes through
8th switching valve QDV104A and the 9th switching valve QDV104B and the second adsorption tower 101B is connected in parallel；
Gas collection unit, including gas collection tank PV102；
Desorption unit, including Pneumatic booster device 102, the Pneumatic booster device include the first air inlet A, the first outlet
Mouth B, the second air inlet C and the second gas outlet D, the first A mouthfuls of air inlet are connected to the first gas outlet B, the second air inlet C and second
Gas outlet D connection；
First air inlet A of Pneumatic booster device is connected by the first switching valve QDV100 with external compressed air source, the
Two air inlet C pass through the 4th switching valve QDV102A and the 5th switching valve QDV102B and the first adsorption tower 101A and the second adsorption tower
The gas outlet of 101B is connected.
First gas outlet B of Pneumatic booster device has also accessed the first muffler XYQ100, and the second gas outlet D is also accessed
Muffler XYQ102.
The compression unit further includes feed back loop, and wherein feed back loop includes to selectivity by compressed original
Material pneumatic transmission enters the necessary pipeline and the second switching valve QDV101A and third switching valve QDV101B of adsorption tower.
The gas collection unit further includes product gas output loop, and product gas output loop includes to selectivity
The necessary pipeline and the 6th switching valve QDV103A and the 7th switching valve QDV103B that adsorption tower is connected to gas collection tank.
The desorption unit further includes desorption circuit and product gas flush loop, wherein desorption circuit includes to select
The necessary pipeline and the 4th switching valve QDV102A and the 5th switching valve by adsorption tower and atmosphere or connection of selecting property
QDV102B, product gas flush loop include individually to selective necessity that adsorption tower is connected with product gas surge tank
Pipeline and the tenth switching valve QDV105A, the 11st switching valve QDV105B and the 12nd switching valve QDV105C.
The system also includes pretreatment unit, the pretreatment unit include sequentially connected first filter AF01,
Cooling driers TC01, the second filter AF02 and third filter AF03.
The operational process of the pressure swing adsorption system are as follows:
Unstripped gas enters absorbing unit after compression unit compresses, and is adsorbed under the adsorptive pressure of 0.03MPa, produces gas
And export to gas collector, compressed air is introduced to Pneumatic booster device, in desorption circuit from external compressed air source
The desorption negative pressure of formation -0.075MPa realizes the desorption and regeneration to adsorbent in adsorption tower.
Using the method for the above-mentioned pressure swing adsorption system separation air with pneumatic device, step includes:
(1) air exports after compressor AB01 compression to gas buffer tank PV101, then sequentially through first filter
After AF01, cooling driers TC01, the second filter AF02 and third filter AF03 except deoil, the solid impurities such as dust；
(2) the second switching valve QDV101A, the 6th switching valve QDV103A and the 14th switching valve JV02, compressed air are opened
Into the first adsorption tower 101A that NaX zeolite adsorbents are housed, is adsorbed under the adsorptive pressure of 0.03MPa, produces gas and defeated
Out to gas collection tank PV102；
After (3) first adsorption tower 101A adsorption saturations, the second switching valve QDV101A is closed, compressed air stops entering the
One adsorption tower 101A opens the 8th switching valve QDV104A and the 9th switching valve QDV104B, by the first adsorption tower 101A and second
Adsorption tower 101B connection, the first adsorption tower 101A and the second adsorption tower 101B of adsorption saturation carry out one or many exchange to return
Receive necessary component and the energy；
(4) the tenth switching valve QDV105A, the 12nd switching valve QDV105C and the 13rd switching valve JV105 are opened, is used
Product gas is rinsed the first adsorption tower 101A, opens the first switching valve QDV100 and the 4th switching valve QDV102A, will be outer
The compressed air for connecing compressed air source generation introduces Pneumatic booster device 102, desorbs the desorption of generation -0.075MPa in circuit
Negative pressure carries out desorption and regeneration to the adsorbent in the first adsorption tower 101A；
(5) third switching valve QDV101B, the 7th switching valve QDV103B and the 14th switching valve JV02 are opened, compression is empty
Gas enters the second adsorption tower 101B equipped with LiX zeolite adsorbents, is adsorbed under the adsorptive pressure of 0.03MPa, produces gas simultaneously
It exports to gas collection tank PV102；
After (6) second adsorption tower 101B adsorption saturations, third switching valve QDV101B is closed, compressed air stops entering the
Two adsorption tower 101B open the 8th switching valve QDV104A and the 9th switching valve QDV104B for the first adsorption tower 101A and second
Adsorption tower 101B connection, the second adsorption tower 101B and the first adsorption tower 101A of adsorption saturation carry out one or many exchange to return
Receive necessary component and the energy；
(7) the 11st switching valve QDV105B, the 12nd switching valve QDV105C and the 13rd switching valve JV105 are opened, is made
The second adsorption tower 101B is rinsed with product gas, opens the first switching valve QDV100 and the 5th switching valve QDV102B, it will
The compressed air that external compressed air source generates introduces Pneumatic booster device 102, desorbs the solution of generation -0.075MPa in circuit
Negative pressure is inhaled, desorption and regeneration is carried out to the adsorbent in the second adsorption tower 101B；
(8) first adsorption tower 101A and the second adsorption tower 101B out-phase sequence are run, and repeat above-mentioned separating step, constantly
The separation of oxygen nitrogen can be realized in circulation, and output purity is 93%, and pressure is the high pressure oxygen of 3.5MPa.
Remaining valve of above-mentioned steps in addition to the switching valve of specified unlatching is in closed state.
The Applicant declares that the foregoing is merely specific embodiment of the present utility model, but the protection model of the utility model
It encloses and is not limited thereto, it should be clear to those skilled in the art, any to belong to those skilled in the art and exist
In the technical scope that the utility model discloses, any changes or substitutions that can be easily thought of, all falls within the protection scope of the utility model
Within the open scope.
Claims (9)
1. a kind of pressure swing adsorption system, which is characterized in that the system comprises sequentially connected compression unit, absorbing unit, solutions
Inhale unit and gas collection unit；
Compression unit, including compression set；
Absorbing unit, including the first adsorption tower and the second adsorption tower in parallel；
Gas collection unit, including gas collector；
Desorption unit, including Pneumatic booster device, the Pneumatic booster device include the first air inlet, the second air inlet, first
Gas outlet and the second gas outlet, the first air inlet are connected to the first gas outlet, and the second air inlet is connected to the second gas outlet；
First air inlet is connect with the gas outlet of compressed gas pipeline, the gas outlet and second of the second air inlet and the first adsorption tower
The gas outlet of adsorption tower is all connected with.
2. pressure swing adsorption system according to claim 1, which is characterized in that the air inlet of the compressed gas pipeline and institute
The gas outlet for stating compression set is connected.
3. pressure swing adsorption system according to claim 1, which is characterized in that be equipped with and live in the Pneumatic booster device
Plug.
4. pressure swing adsorption system according to claim 3, which is characterized in that the driving force of the Pneumatic booster device is pressure
Contracting air or compression unstripped gas.
5. pressure swing adsorption system according to claim 1, which is characterized in that the first gas outlet of the Pneumatic booster device
It is connect respectively with muffler with the second gas outlet.
6. pressure swing adsorption system according to claim 1, which is characterized in that the system also includes pretreatment unit, institutes
Stating pretreatment unit includes filter and cooling driers.
7. pressure swing adsorption system according to claim 1, which is characterized in that the compression unit further includes feed back loop；
The feed back loop includes the switch valve and pipeline unstripped gas to be sent into the absorbing unit.
8. pressure swing adsorption system according to claim 1, which is characterized in that the gas collection unit further includes product
Gas output loop；
The product gas output loop includes the switching the absorbing unit to be connected to the gas collection unit
Valve and pipeline.
9. pressure swing adsorption system according to claim 1, which is characterized in that the desorption unit further include desorption circuit and
Product gas flush loop；
Wherein, the desorption circuit includes the switch valve and necessary pipeline to connect absorbing unit and atmosphere, institute
The product gas flush loop stated include individually to the switch valve that is connected to absorbing unit with the gas collection unit with
And necessary pipeline.
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