CN108939820A - A kind of vacuum pressure swing adsorption system for oxygen production and method - Google Patents
A kind of vacuum pressure swing adsorption system for oxygen production and method Download PDFInfo
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- CN108939820A CN108939820A CN201811092464.4A CN201811092464A CN108939820A CN 108939820 A CN108939820 A CN 108939820A CN 201811092464 A CN201811092464 A CN 201811092464A CN 108939820 A CN108939820 A CN 108939820A
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 91
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000001301 oxygen Substances 0.000 title claims abstract description 70
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 54
- 239000006096 absorbing agent Substances 0.000 claims description 134
- 239000007789 gas Substances 0.000 claims description 81
- 230000008859 change Effects 0.000 claims description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 18
- 230000007423 decrease Effects 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000003463 adsorbent Substances 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000000703 high-speed centrifugation Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 229960004424 carbon dioxide Drugs 0.000 claims 2
- 229910002090 carbon oxide Inorganic materials 0.000 claims 2
- 230000000694 effects Effects 0.000 description 20
- 238000005265 energy consumption Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 230000008676 import Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 238000005119 centrifugation Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/0476—Vacuum pressure swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/053—Pressure swing adsorption with storage or buffer vessel
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The present invention relates to a kind of vacuum pressure swing adsorption system for oxygen production and methods, including speed type blower, adsorption separation unit and speed type vacuum pump, it is connected with fan condition control unit between the air inlet and speed type blower of the adsorption separation unit, is connected with vacuum pump operating conditions unit between the exhaust outlet and speed type vacuum pump of the adsorption separation unit.Pass through the aperture of adjusting control valve A, when pressure fluctuates, with look-ahead and adjusting can be carried out, to eliminate the influence of valve event time lag bring, the inlet flow rate of fan condition control unit is equal with speed type fan outlet flow, is equal to vacuum pump inlet flow rate by the flow of control valve B, the pressure of surge tank B is kept constant, namely speed type vacuum pump inlet flow rate pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure.
Description
Technical field
The invention belongs to oxygen generating plant technical field more particularly to a kind of vacuum pressure swing adsorption system for oxygen production and methods.
Background technique
Vacuum pressure swing adsorption system for oxygen production is using air blower boosting raw air and to be sent to adsorption tower, utilizes suction
The different adsorbents loaded in attached tower under high pressure to water (H2O), carbon dioxide (CO2) and the nitrogen (N2) in raw air into
Row selective absorption, and unadsorbed oxygen (O2) becomes the product gas of system production；In adsorbent adsorption saturation, use
Vacuum pump vacuumizes decompression to adsorption tower, obtains the water (H2O) being adsorbed by adsorbent, carbon dioxide (CO2) and nitrogen (N2)
Desorption, adsorbent are regenerated, and the oxygen rich air product for obtaining higher oxygen concentration (60 ~ 93%) is recycled using multitower.
Patent No. CN201020580511.2, applying date 2010-10-28 disclose a kind of Vacuum Pressure Swing Adsorption system
Oxygen system, including Roots blower and absorber, the absorber top are provided with escape pipe, one end connection of the escape pipe
There is oxygen surge tank；Inlet filter and inlet buffer, the entrance are additionally provided at the air inlet of the Roots blower
Filter is located at the top of the inlet buffer, and the inlet buffer is equipped with the first connecting hole, the second connecting hole and the
Three connecting holes, first connecting hole are connected with the air inlet of the Roots blower, second connecting hole and sieve
The gas outlet of thatch air blower is connected, and the third connecting hole is connected with the air inlet of the Roots vaccum pump.
Above-mentioned patent by the air inlet of Roots blower inlet porting surge tank by Roots vaccum pump and Roots drum
Blower is connected, and saves the usage quantity of filter, reduces use cost and maintenance cost.But Roots vaccum pump with
The following disadvantage of Roots blower.
1, noise is big, needs to workshop entirety noise isolating, while to solve the contradiction of noise isolating and ventilation, not only not environmentally but also increase
Investment；
2, vibration is big, and Roots's vibration equipment is big, needs to do aseismatic design to coupled pipeline, and it is difficult to increase unnecessary technology
Degree and investment；
3, energy consumption is high, the thermal efficiency of Roots's equipment usually only 60% or so, compares more other advanced gas compressing equipments, energy
It consumes larger；
4, it is unfavorable for optimal control, cyclic fluctuation can be presented in omnibus control system process flow, and Roots's equipment can not be directed to should
Change operating condition and carry out active adjusting, due to the intrinsic characteristic of Roots's equipment, when fluctuating, usually driven bearing is by but past
Toward that can cause biggish impact to equipment, to influence the bulk life time and reliability of equipment, for another example, when needing to reduce, production oxygen is negative
When lotus, on large-scale oxygenerator, Roots's equipment is not almost available frequency conversion equipment and adjusts load, can only put to extra oxygen
Sky does not carry out pressure to Roots's equipment and handles, be easy to cause pressure in the process of running not to cause unnecessary waste
The case where balanced phenomenon, will cause the uneven concentration of oxygen, be lower than bottom if there is top of the tank oxygen concentration, cleaning
The product gas that process utilizes, the overwhelming majority can be taken away by vacuum pump, i.e., the portioned product body slatterns.
Summary of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, a kind of vacuum pressure swing adsorption is provided
System and method, the system using higher efficiency compressor (blower or vacuum pump) and provide and a kind of overcome fluctuation of operating conditions
Scheme is effectively guaranteed system and steadily reliably runs, and show to solve the contradiction of speed type compressor and operating condition
Write noise, vibration and the energy consumption for reducing oxygen generation system.
To achieve the above object, the technical solution adopted by the present invention is as follows.
A kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower, adsorption separation unit) and speed type vacuum pump,
Fan condition control unit, the adsorbing separation list are connected between the air inlet and speed type blower of the adsorption separation unit
Vacuum pump operating conditions unit is connected between the exhaust outlet and speed type vacuum pump of member；
The fan condition control unit includes surge tank A, control valve A and valve A, and surge tank A is gone here and there by pipeline and control valve A
Join setting, is arranged in parallel after the surge tank A and control valve A series connection with valve A, the control valve A and valve A divide with absorption
Air inlet connection from unit；
The vacuum pump operating conditions unit includes surge tank B, control valve B and valve B, the control valve B by pipeline and delays
It rushes tank B to be arranged in series, be arranged in parallel after the surge tank B and control valve B series connection with valve B, the control valve B and valve B are equal
It is connected to the exhaust outlet of adsorption separation unit;
It is to control the valve of specific gas flow rate between 50 ~ 150% that the control valve A and control valve B, which is opened into suitable aperture,
Any appropriate open degree；
The control valve A is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A is flowing through valve A
The 50 ~ 150% of flow；The control valve B is opened into suitable aperture are as follows: under the aperture, flows through the flow control of control valve B
Flowing through the 50 ~ 150% of valve B flow.
The adsorption separation unit includes at least two absorbers, and the absorber includes absorber A and absorber B, institute
It states and is connected with intake valve A and exhaust valve A, the intake valve A and exhaust valve A on absorber A and is arranged side by side, on the absorber B
Intake valve B and exhaust valve B, the intake valve B and exhaust valve B is connected with to be arranged side by side, the intake valve A and intake valve B with
The connection of fan condition control unit, the exhaust valve A and exhaust valve B are connect with vacuum pump operating conditions unit.
The intake valve A, exhaust valve A, intake valve B and exhaust valve B are flow regulating and controlling valve door.
The control valve A and control valve B be opened into suitable aperture be control specific gas flow rate valve from 90-110% it
Between any appropriate open degree.
The speed type blower include centrifugal blower, single-stage high-speed centrifugation, blower Multi-stage centrifugal fan, axial fan,
Turbine blower.
The speed type vacuum pump includes that centrifugal vacuum pump, single-stage high-speed centrifugal vacuum pump, multistage centrafugal vacuum pump, axial-flow type are true
Sky pump, turbine vacuum pump.
The control valve A is multiple, and is arranged in parallel, and the control valve B is multiple, and is arranged in parallel.
A kind of vacuum pressure swing adsorption method, it is characterised in that: the following steps are included:
Control valve A and the preset aperture of control valve B are 2-20%, close valve A, exhaust valve A, intake valve B and valve by a, starting
B opens intake valve A and exhaust valve B, starts speed type blower and speed type vacuum pump, and gas successively passes through surge tank A, control
Valve A, intake valve A flow into absorber A；
Control valve A and control valve B aperture are gradually increased by b, current stabilization, and absorber A pressure increases to 100-140kpa.A, absorption
Device B pressure is gradually decreased to 40-70kpa.A, is then turned on valve A and valve B；
C produces oxygen, and gas successively passes through valve A and intake valve A enters absorber A, nitrogen, carbon dioxide in gas, and water is inhaled
Adsorbent absorption in adnexa A, output oxygen gradually decrease the aperture of control valve A, and control valve A aperture reaches before operating condition changes
To 5-20%, it is to close valve A and in advance adjusting control valve A when the variation of adsorption separation unit operating condition that aperture, which reaches 5-20%,
To suitable aperture, after operating condition variation, the flow for flowing through control valve A is speed type wind between the 50% ~ 150% of declared working condition
The pressure of machine and absorber A are controlled in 120-150kpa.A；
D, vacuum, while step C, the gas adsorbed in absorber B successively passes through exhaust valve B and valve B is true by speed type
Empty pumping goes out, and gradually decreases the aperture of control valve B, and control valve B aperture reaches 5-20% before operating condition changes, and aperture reaches 5-20%
To close valve B(43 when the variation of adsorption separation unit operating condition) and adjusting control valve B is to suitable aperture in advance, in work
After condition variation, the flow for flowing through control valve B is the pressure of speed type vacuum pump and absorber B between the 50% ~ 150% of declared working condition
It is strong to control in 30-60kpa.A,
Valve A and intake valve A, exhaust valve B and valve B are closed in e, switching, open exhaust valve A and intake valve B, gas successively pass through
It crosses speed type blower, surge tank A, control valve A and intake valve B and enters absorber B, absorber B pressure gradually increases, absorber A
In gas successively pass through exhaust valve A, control valve B, surge tank B and extracted out by speed type vacuum pump, absorber A pressure gradually drops
It is low;
F, current stabilization, control valve A and control valve B aperture are gradually increased, and absorber B pressure increases to 100-140kpa.A, absorber A
Pressure is gradually decreased to 40-70kpa.A, is then turned on valve A and valve B；
G produces oxygen, and gas successively passes through valve A and intake valve B enters absorber B, nitrogen, carbon dioxide in gas, and water is inhaled
Adsorbent absorption in adnexa B, output oxygen gradually decreases control valve A(22) aperture, control valve A is opened before operating condition changes
Degree reaches 5-20%, and it is to close valve A when the variation of adsorption separation unit operating condition and adjust control in advance that aperture, which reaches 5-20%,
Valve A is to suitable aperture, and after operating condition variation, the flow for flowing through control valve A is absorber between the 50% ~ 150% of declared working condition
The pressure of B is controlled in 120-150kpa.A,
H, vacuum, while step g, the gas adsorbed in absorber A successively passes through exhaust valve A and valve B is true by speed type
Empty pumping goes out, and gradually decreases the aperture of control valve B, and control valve B aperture reaches 5-20% before operating condition changes, and aperture reaches 5-20%
For when the variation of adsorption separation unit operating condition, closing valve B and in advance adjusting control valve B to suitable aperture become in operating condition
After change, the flow for flowing through control valve B is between the 50% ~ 150% of declared working condition, and the pressure of absorber A is controlled in 30-60kpa.A,
Valve A, intake valve B, exhaust valve A and valve B are closed in i, switching, open intake valve A and exhaust valve B, gas successively pass through
Speed type blower, surge tank A, control valve A, intake valve A enter absorber A, and absorber A pressure gradually increases, in absorber B
Gas successively passes through exhaust valve B, control valve B, surge tank B and is extracted out by speed type vacuum pump, and absorber B pressure gradually decreases;
J, circulation repeat step b to i, circuit sequentially work.
Using the advantage of the invention is that.
1, by increasing surge tank A, control valve A and valve A in speed type fan outlet, when outlet pressure reduces suddenly
When, before closing valve A, according to the aperture of pressure-adjusting control valve A, when pressure fluctuates, with look-ahead and it can carry out
It adjusts, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed type blower of fan condition control unit
Rate of discharge is equal, in this way, the pressure of surge tank A is kept constant namely speed type fan outlet flow pressure is kept constant,
Meanwhile by increasing surge tank B, control valve B and valve B in speed type vacuum pump inlet, when inlet pressure increases suddenly, close
Before valve closing door B, according to the aperture of pressure-adjusting control valve B, optimal situation is to be equal to vacuum pump by the flow of control valve B
The pressure of inlet flow rate, surge tank B is kept constant namely speed type vacuum pump inlet flow rate pressure is kept constant, Jin Erbao
The stationarity for demonstrate,proving inlet pressure and outlet pressure, is conducive to adsorption operations, while reducing the loss of product oxygen, guarantees absorption
The distribution of oxygen concentration inside device improves the efficiency of adsorption operations, reduces energy to increase the yield of product oxygen
Consumption, has saved cost, in the product gas that cleaning process utilizes, the overwhelming majority will not be taken away by vacuum pump, control speed type wind
The pressure oscillation of machine and speed type vacuum pump changes, and reduces the noise of equipment, vibrates big and energy consumption, to use efficient centrifugal equipment
It creates condition, reduces the noise and energy consumption of system, while it is initial standard-sized sheet stream that control valve A and control valve B, which control its flow,
Between the 50 ~ 150% of amount, to pressure change gas to the effect slowed down, effectively prevent pressure from hurried fluctuating change occurs, thus
Influence of the pressure change to speed type blower and speed type vacuum pump greatly reduces.
2, it is converted by the way that valve is arranged side by side convenient for the gas absorption of control absorber A and absorber B, improves production effect
Rate, using multiple absorbers, when an absorber damages, other absorbers can work on, and equipment is avoided to stop working
Bring loss.
3, by flow regulating and controlling valve door, when there is no fan condition control unit and vacuum pump operating conditions unit,
50 ~ 150% flows can also be automatically controlled, the utilization of equipment is reduced, reduce production cost and reduce equipment occupation space.
4, maximally efficient to pressure change gas to the effect slowed down by any appropriate open degree between 90-110%
Prevent pressure from hurried fluctuating change occurs, so that pressure change greatly reduce to speed type blower and speed type vacuum pump
It influences, effect is best.
5, by using centrifugation apparatus, its usual pressure ratio is 1.3 ~ 3.0 or so, when periodicity can be presented in oxygen process flow processed
Fluctuation, high speed centrifugation compressor carry out active adjusting, to can have lesser impact to equipment, improve equipment bulk life time and can
By property, for another example, when needing to reduce production oxygen load, on large-scale oxygenerator, it is able to use frequency conversion equipment and adjusts load, it can only be right
Extra oxygen emptying, to cause unnecessary waste.
6, it by multiple control valve A and control valve B, to control its aperture, realizes and controls its flow rate by gas.
7, by this method step, the 2-20% aperture of control valve A and control valve B is controlled, passes the gas through control valve A's
Flow rate is in 50 ~ 150% ranges by valve A flow rate, while the flow rate for passing the gas through control valve B is by valve B flow rate
50 ~ 150% ranges in, thus delay switching be pressure increase and decrease time, the pressure between guaranteed rate formula blower and absorber
Value keeps the pressure value for reducing absorber and speed type vacuum pump always to change, and reduces the fluctuation of pressure.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of the invention using multiple control valves.
Appended drawing reference: 1, speed type blower, 2, fan condition control unit, 3, adsorption separation unit, 4, vacuum pump condition
Control unit, 5, speed type vacuum pump, 21, surge tank A, 22, control valve A, 23, valve A, 31, absorber A, 32, absorber B,
33, intake valve A, 34, exhaust valve A, 35, intake valve B, 36, exhaust valve B, 41, surge tank B, 42, control valve B, 43, valve B.
Specific embodiment
Following further describes the present invention with reference to the drawings.
Embodiment 1
As shown in Figure 1, a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower 1, adsorption separation unit 3 and speed type
Vacuum pump 5 is connected with fan condition control unit 2, institute between the air inlet and speed type blower 1 of the adsorption separation unit 3
It states and is connected with vacuum pump operating conditions unit 4 between the exhaust outlet of adsorption separation unit 3 and speed type vacuum pump 5；
The fan condition control unit 2 include surge tank A21, control valve A22 and valve A23, surge tank A21 by pipeline with
Control valve A22 is arranged in series, and is arranged in parallel after the surge tank A21 and control valve A22 series connection with valve A23, the control valve
A22 is connected to the air inlet of adsorption separation unit 3 with valve A23；
The vacuum pump operating conditions unit 4 includes surge tank B41, control valve B42 and valve B43, and the control valve B42 passes through
Pipeline is arranged in series with surge tank B41, is arranged in parallel after the surge tank B41 and control valve B42 series connection with valve B43, described
Control valve B42 and valve B43 are connected to the exhaust outlet of adsorption separation unit 3;
The control valve A22 and control valve B42 be opened into suitable aperture be control specific gas flow rate valve from 50 ~ 150% it
Between any appropriate open degree；
The control valve A22 is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A22 is being flowed through
The 50 ~ 150% of valve A23 flow；The control valve B42 is opened into suitable aperture are as follows: under the aperture, flows through control valve B42
Flow control flowing through the 50 ~ 150% of valve B43 flow, such as: the gas flow of valve A23 is 10000 cubes ms/min
Clock is 5000-15000 cubic meters per minute by the flow of control valve A22, the gas flow of valve B43 is 10000 cubic metres/
Minute, the flow by control valve B42 is 5000-15000 cubic meters per minute.
Increase surge tank A21, control valve A22 and valve A23 by exporting in speed type blower 1, when outlet pressure is unexpected
It,, can be pre- in advance when pressure fluctuates according to the aperture of pressure-adjusting control valve A22 before closing valve A21 when reduction
Adjusting is surveyed and carries out, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed of fan condition control unit 2
Rate formula 1 rate of discharge of blower is equal, in this way, the pressure of surge tank A21 is kept constant namely 1 rate of discharge pressure of speed type blower
Power is kept constant, meanwhile, by increasing surge tank B41, control valve B52 and valve B43 in 4 import of speed type vacuum pump, when
When inlet pressure increases suddenly, before closing valve B43, according to the aperture of pressure-adjusting control valve B43, optimal situation is to lead to
The flow for crossing control valve B43 is equal to vacuum pump inlet flow rate, and the pressure of surge tank B43 is kept constant namely speed type vacuum pump 5
Inlet flow rate pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure, is conducive to adsorption operations, simultaneously
Reduce the loss of product oxygen, guarantees that the distribution of the oxygen concentration inside absorber mentions to increase the yield of product oxygen
The high efficiency of adsorption operations, reduces energy consumption, has saved cost, in the product gas that cleaning process utilizes, the overwhelming majority will not
It is taken away by vacuum pump, controls the pressure oscillation variation of speed type blower 1 and speed type vacuum pump 5, reduce noise, the vibration of equipment
Dynamic big and energy consumption reduces the noise and energy consumption of system, while control valve A22 to create condition using efficient centrifugal equipment
And control valve B42 control its flow be initial standard-sized sheet flow 50 ~ 150% between, to pressure change gas to the effect slowed down, have
Effect prevents pressure from hurried fluctuating change occurs, so that pressure change greatly reduce to speed type blower and speed type vacuum
The influence of pump.
Embodiment 2
As shown in Figure 1, a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower 1, adsorption separation unit 3 and speed type
Vacuum pump 5 is connected with fan condition control unit 2, institute between the air inlet and speed type blower 1 of the adsorption separation unit 3
It states and is connected with vacuum pump operating conditions unit 4 between the exhaust outlet of adsorption separation unit 3 and speed type vacuum pump 5；
The fan condition control unit 2 include surge tank A21, control valve A22 and valve A23, surge tank A21 by pipeline with
Control valve A22 is arranged in series, and is arranged in parallel after the surge tank A21 and control valve A22 series connection with valve A23, the control valve
A22 is connected to the air inlet of adsorption separation unit 3 with valve A23；
The vacuum pump operating conditions unit 4 includes surge tank B41, control valve B42 and valve B43, and the control valve B42 passes through
Pipeline is arranged in series with surge tank B41, is arranged in parallel after the surge tank B41 and control valve B42 series connection with valve B43, described
Control valve B42 and valve B43 are connected to the exhaust outlet of adsorption separation unit 3;
The control valve A22 and control valve B42 be opened into suitable aperture be control specific gas flow rate valve from 50 ~ 150% it
Between any appropriate open degree；
The control valve A22 is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A22 is being flowed through
The 50 ~ 150% of valve A23 flow；The control valve B42 is opened into suitable aperture are as follows: under the aperture, flows through control valve B42
Flow control flowing through the 50% of valve B43 flow.
The adsorption separation unit 3 includes at least two absorbers, and the absorber includes absorber A31 and absorber
Intake valve A33 and exhaust valve A34 are connected on B32, the absorber A31, the intake valve A33 and exhaust valve A34 are set side by side
It sets, intake valve B35 and exhaust valve B36 is connected on the absorber B32, the intake valve B35 and exhaust valve B36 are set side by side
It sets, the intake valve A33 and intake valve B35 are connect with fan condition control unit 2, the exhaust valve A34 and exhaust valve B36
It is connect with vacuum pump operating conditions unit 4.
Increase surge tank A21, control valve A22 and valve A23 by exporting in speed type blower 1, when outlet pressure is unexpected
It,, can be pre- in advance when pressure fluctuates according to the aperture of pressure-adjusting control valve A22 before closing valve A21 when reduction
Adjusting is surveyed and carries out, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed of fan condition control unit 2
Rate formula 1 rate of discharge of blower is equal, in this way, the pressure of surge tank A21 is kept constant namely 1 rate of discharge pressure of speed type blower
Power is kept constant, meanwhile, by increasing surge tank B41, control valve B52 and valve B43 in 4 import of speed type vacuum pump, when
When inlet pressure increases suddenly, before closing valve B43, according to the aperture of pressure-adjusting control valve B43, optimal situation is to lead to
The flow for crossing control valve B43 is equal to vacuum pump inlet flow rate, and the pressure of surge tank B43 is kept constant namely speed type vacuum pump 5
Inlet flow rate pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure, is conducive to adsorption operations, simultaneously
Reduce the loss of product oxygen, guarantees that the distribution of the oxygen concentration inside absorber mentions to increase the yield of product oxygen
The high efficiency of adsorption operations, reduces energy consumption, has saved cost, in the product gas that cleaning process utilizes, the overwhelming majority will not
It is taken away by vacuum pump, controls the pressure oscillation variation of speed type blower 1 and speed type vacuum pump 5, reduce noise, the vibration of equipment
Dynamic big and energy consumption reduces the noise and energy consumption of system, while control valve A22 to create condition using efficient centrifugal equipment
And control valve B42 control its flow be initial standard-sized sheet flow 50% between, to pressure change gas to the effect slowed down, effectively
Prevent pressure from hurried fluctuating change occurs, so that pressure change greatly reduce to speed type blower and speed type vacuum pump
It influences.
By the way that valve is arranged side by side convenient for the gas absorption conversion of control absorber A31 and absorber B32, production effect is improved
Rate, using multiple absorbers, when an absorber damages, other absorbers can work on, and equipment is avoided to stop working
Bring loss.
Embodiment 3
As shown in Figure 1, a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower 1, adsorption separation unit 3 and speed type
Vacuum pump 5 is connected with fan condition control unit 2, institute between the air inlet and speed type blower 1 of the adsorption separation unit 3
It states and is connected with vacuum pump operating conditions unit 4 between the exhaust outlet of adsorption separation unit 3 and speed type vacuum pump 5；
The fan condition control unit 2 include surge tank A21, control valve A22 and valve A23, surge tank A21 by pipeline with
Control valve A22 is arranged in series, and is arranged in parallel after the surge tank A21 and control valve A22 series connection with valve A23, the control valve
A22 is connected to the air inlet of adsorption separation unit 3 with valve A23；
The vacuum pump operating conditions unit 4 includes surge tank B41, control valve B42 and valve B43, and the control valve B42 passes through
Pipeline is arranged in series with surge tank B41, is arranged in parallel after the surge tank B41 and control valve B42 series connection with valve B43, described
Control valve B42 and valve B43 are connected to the exhaust outlet of adsorption separation unit 3;
The control valve A22 and control valve B42 be opened into suitable aperture be control specific gas flow rate valve from 50 ~ 150% it
Between any appropriate open degree；
The control valve A22 is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A22 is being flowed through
The 50 ~ 150% of valve A23 flow；The control valve B42 is opened into suitable aperture are as follows: under the aperture, flows through control valve B42
Flow control flowing through the 150% of valve B43 flow.
The adsorption separation unit 3 includes at least two absorbers, and the absorber includes absorber A31 and absorber
Intake valve A33 and exhaust valve A34 are connected on B32, the absorber A31, the intake valve A33 and exhaust valve A34 are set side by side
It sets, intake valve B35 and exhaust valve B36 is connected on the absorber B32, the intake valve B35 and exhaust valve B36 are set side by side
It sets, the intake valve A33 and intake valve B35 are connect with fan condition control unit 2, the exhaust valve A34 and exhaust valve B36
It is connect with vacuum pump operating conditions unit 4.
The intake valve A33, exhaust valve A34, intake valve B35 and exhaust valve B36 are flow regulating and controlling valve door.
It is to control the valve of specific gas flow rate from 90- that the control valve A22 and control valve B42, which is opened into suitable aperture,
Any appropriate open degree between 110%.
The speed type blower 1 include centrifugal blower, single-stage high-speed centrifugation, blower Multi-stage centrifugal fan, axial fan,
Turbine blower.
Increase surge tank A21, control valve A22 and valve A23 by exporting in speed type blower 1, when outlet pressure reduces suddenly
When, it,, can be with look-ahead simultaneously when pressure fluctuates according to the aperture of pressure-adjusting control valve A22 before closing valve A21
Adjusting is carried out, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed type of fan condition control unit 2
1 rate of discharge of blower is equal, in this way, the pressure of surge tank A21 is kept constant namely 1 rate of discharge pressure of speed type blower is equal
It keeps constant, meanwhile, by increasing surge tank B41, control valve B52 and valve B43 in 4 import of speed type vacuum pump, work as import
When pressure increases suddenly, before closing valve B43, according to the aperture of pressure-adjusting control valve B43, optimal situation is to pass through control
The flow of valve B43 processed is equal to vacuum pump inlet flow rate, and the pressure of surge tank B43 is kept constant namely 5 import of speed type vacuum pump
Flow pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure, is conducive to adsorption operations, is reduced simultaneously
The loss of product oxygen guarantees that the distribution of the oxygen concentration inside absorber improves to increase the yield of product oxygen
The efficiency of adsorption operations, reduces energy consumption, has saved cost, and in the product gas that cleaning process utilizes, the overwhelming majority will not be true
Empty pumping is walked, and the pressure oscillation variation of speed type blower 1 and speed type vacuum pump 5 is controlled, and noise, the vibration for reducing equipment are big
And energy consumption reduces the noise and energy consumption of system, while control valve A22 and control to create condition using efficient centrifugal equipment
Valve B42 processed is controlled between its flow is initial standard-sized sheet flow 150%, to pressure change gas to the effect slowed down, is effectively prevented
Hurried fluctuating change occurs for pressure, so that pressure change greatly reduce to the shadow of speed type blower and speed type vacuum pump
It rings.
By the way that valve is arranged side by side convenient for the gas absorption conversion of control absorber A31 and absorber B32, production effect is improved
Rate, using multiple absorbers, when an absorber damages, other absorbers can work on, and equipment is avoided to stop working
Bring loss.
By flow regulating and controlling valve door, when there is no fan condition control unit 2 and vacuum pump operating conditions unit 4,
150% flow can also be automatically controlled, the utilization of equipment is reduced, reduce production cost and reduces equipment occupation space.
By any appropriate open degree between 90-110%, to pressure change gas to the effect slowed down, maximally efficient is anti-
Only hurried fluctuating change occurs for pressure, so that pressure change greatly reduce to speed type blower 1 and speed type vacuum pump 5
It influences, effect is best.
By using centrifugation apparatus, its usual pressure ratio is 1.3 ~ 3.0 or so, when periodic wave can be presented in oxygen process flow processed
Dynamic, high speed centrifugation compressor carries out active adjusting, to that can have lesser impact to equipment, improves the bulk life time of equipment and reliable
Property, for another example, when needing to reduce production oxygen load, on large-scale oxygenerator, it is able to use frequency conversion equipment and adjusts load, it can only be to more
Remaining oxygen emptying, to cause unnecessary waste.
Embodiment 4
As shown in Figure 1, a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower 1, adsorption separation unit 3 and speed type
Vacuum pump 5 is connected with fan condition control unit 2, institute between the air inlet and speed type blower 1 of the adsorption separation unit 3
It states and is connected with vacuum pump operating conditions unit 4 between the exhaust outlet of adsorption separation unit 3 and speed type vacuum pump 5；
The fan condition control unit 2 include surge tank A21, control valve A22 and valve A23, surge tank A21 by pipeline with
Control valve A22 is arranged in series, and is arranged in parallel after the surge tank A21 and control valve A22 series connection with valve A23, the control valve
A22 is connected to the air inlet of adsorption separation unit 3 with valve A23；
The vacuum pump operating conditions unit 4 includes surge tank B41, control valve B42 and valve B43, and the control valve B42 passes through
Pipeline is arranged in series with surge tank B41, is arranged in parallel after the surge tank B41 and control valve B42 series connection with valve B43, described
Control valve B42 and valve B43 are connected to the exhaust outlet of adsorption separation unit 3;
It is to control the valve of specific gas flow rate between 100% that the control valve A22 and control valve B42, which is opened into suitable aperture,
Any appropriate open degree；
The control valve A22 is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A22 is being flowed through
The 50 ~ 150% of valve A23 flow；The control valve B42 is opened into suitable aperture are as follows: under the aperture, flows through control valve B42
Flow control flowing through the 100% of valve B43 flow.
The adsorption separation unit 3 includes at least two absorbers, and the absorber includes absorber A31 and absorber
Intake valve A33 and exhaust valve A34 are connected on B32, the absorber A31, the intake valve A33 and exhaust valve A34 are set side by side
It sets, intake valve B35 and exhaust valve B36 is connected on the absorber B32, the intake valve B35 and exhaust valve B36 are set side by side
It sets, the intake valve A33 and intake valve B35 are connect with fan condition control unit 2, the exhaust valve A34 and exhaust valve B36
It is connect with vacuum pump operating conditions unit 4.
The intake valve A33, exhaust valve A34, intake valve B35 and exhaust valve B36 are flow regulating and controlling valve door.
The control valve A22 and control valve B42 be opened into suitable aperture be control specific gas flow rate valve from 90% it
Between any appropriate open degree.
The speed type blower 1 include centrifugal blower, single-stage high-speed centrifugation, blower Multi-stage centrifugal fan, axial fan,
Turbine blower.
The speed type vacuum pump 14 includes centrifugal vacuum pump, single-stage high-speed centrifugal vacuum pump, multistage centrafugal vacuum pump, axial-flow type
Vacuum pump, turbine vacuum pump.
Shown in Fig. 2, the control valve A22 is multiple, and is arranged in parallel, and the control valve B42 is multiple, and parallel connection is set
It sets.
Increase surge tank A21, control valve A22 and valve A23 by exporting in speed type blower 1, when outlet pressure is unexpected
It,, can be pre- in advance when pressure fluctuates according to the aperture of pressure-adjusting control valve A22 before closing valve A21 when reduction
Adjusting is surveyed and carries out, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed of fan condition control unit 2
Rate formula 1 rate of discharge of blower is equal, in this way, the pressure of surge tank A21 is kept constant namely 1 rate of discharge pressure of speed type blower
Power is kept constant, meanwhile, by increasing surge tank B41, control valve B52 and valve B43 in 4 import of speed type vacuum pump, when
When inlet pressure increases suddenly, before closing valve B43, according to the aperture of pressure-adjusting control valve B43, optimal situation is to lead to
The flow for crossing control valve B43 is equal to vacuum pump inlet flow rate, and the pressure of surge tank B43 is kept constant namely speed type vacuum pump 5
Inlet flow rate pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure, is conducive to adsorption operations, simultaneously
Reduce the loss of product oxygen, guarantees that the distribution of the oxygen concentration inside absorber mentions to increase the yield of product oxygen
The high efficiency of adsorption operations, reduces energy consumption, has saved cost, in the product gas that cleaning process utilizes, the overwhelming majority will not
It is taken away by vacuum pump, controls the pressure oscillation variation of speed type blower 1 and speed type vacuum pump 5, reduce noise, the vibration of equipment
Dynamic big and energy consumption reduces the noise and energy consumption of system, while control valve A22 to create condition using efficient centrifugal equipment
And control valve B42 control its flow be initial standard-sized sheet flow 100% between, to pressure change gas to the effect slowed down, effectively
Prevent pressure from hurried fluctuating change occurs, so that pressure change greatly reduce to speed type blower and speed type vacuum pump
It influences.
By the way that valve is arranged side by side convenient for the gas absorption conversion of control absorber A31 and absorber B32, production effect is improved
Rate, using multiple absorbers, when an absorber damages, other absorbers can work on, and equipment is avoided to stop working
Bring loss.
By flow regulating and controlling valve door, when there is no fan condition control unit 2 and vacuum pump operating conditions unit 4,
100% flow can also be automatically controlled, the utilization of equipment is reduced, reduce production cost and reduces equipment occupation space.
By any appropriate open degree between 90%, to pressure change gas to the effect slowed down, maximally efficient prevents from pressing
Hurried fluctuating change occurs for power, so that pressure change greatly reduce to the shadow of speed type blower 1 and speed type vacuum pump 5
It rings, effect is best.
By using centrifugation apparatus, its usual pressure ratio is 1.3 ~ 3.0 or so, when periodic wave can be presented in oxygen process flow processed
Dynamic, high speed centrifugation compressor carries out active adjusting, to that can have lesser impact to equipment, improves the bulk life time of equipment and reliable
Property, for another example, when needing to reduce production oxygen load, on large-scale oxygenerator, it is able to use frequency conversion equipment and adjusts load, it can only be to more
Remaining oxygen emptying, to cause unnecessary waste.
By multiple control valve A22 and control valve B42, to control its aperture, realizes and control its stream by gas
Rate.
Embodiment 5
As shown in Figure 1, a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower 1, adsorption separation unit 3 and speed type
Vacuum pump 5 is connected with fan condition control unit 2, institute between the air inlet and speed type blower 1 of the adsorption separation unit 3
It states and is connected with vacuum pump operating conditions unit 4 between the exhaust outlet of adsorption separation unit 3 and speed type vacuum pump 5；
The fan condition control unit 2 include surge tank A21, control valve A22 and valve A23, surge tank A21 by pipeline with
Control valve A22 is arranged in series, and is arranged in parallel after the surge tank A21 and control valve A22 series connection with valve A23, the control valve
A22 is connected to the air inlet of adsorption separation unit 3 with valve A23；
The vacuum pump operating conditions unit 4 includes surge tank B41, control valve B42 and valve B43, and the control valve B42 passes through
Pipeline is arranged in series with surge tank B41, is arranged in parallel after the surge tank B41 and control valve B42 series connection with valve B43, described
Control valve B42 and valve B43 are connected to the exhaust outlet of adsorption separation unit 3;
It is to control the valve of specific gas flow rate between 120% that the control valve A22 and control valve B42, which is opened into suitable aperture,
Any appropriate open degree；
The control valve A22 is opened into suitable aperture are as follows: under the aperture, the flow control for flowing through control valve A22 is being flowed through
The 120% of valve A23 flow；The control valve B42 is opened into suitable aperture are as follows: under the aperture, flows through control valve B42's
Flow control is flowing through the 120% of valve B43 flow.
The adsorption separation unit 3 includes at least two absorbers, and the absorber includes absorber A31 and absorber
Intake valve A33 and exhaust valve A34 are connected on B32, the absorber A31, the intake valve A33 and exhaust valve A34 are set side by side
It sets, intake valve B35 and exhaust valve B36 is connected on the absorber B32, the intake valve B35 and exhaust valve B36 are set side by side
It sets, the intake valve A33 and intake valve B35 are connect with fan condition control unit 2, the exhaust valve A34 and exhaust valve B36
It is connect with vacuum pump operating conditions unit 4.
The intake valve A33, exhaust valve A34, intake valve B35 and exhaust valve B36 are flow regulating and controlling valve door.
It is to control the valve of specific gas flow rate from 110% that the control valve A22 and control valve B42, which is opened into suitable aperture,
Between any appropriate open degree.
The speed type blower 1 include centrifugal blower, single-stage high-speed centrifugation, blower Multi-stage centrifugal fan, axial fan,
Turbine blower.
The speed type vacuum pump 14 includes centrifugal vacuum pump, single-stage high-speed centrifugal vacuum pump, multistage centrafugal vacuum pump, axial-flow type
Vacuum pump, turbine vacuum pump.
Shown in Fig. 2, the control valve A22 is multiple, and is arranged in parallel, and the control valve B42 is multiple, and parallel connection is set
It sets.
A kind of vacuum pressure swing adsorption method, comprising the following steps:
Control valve A22 and the preset aperture of control valve B42 are 2-20%, close valve A23, exhaust valve A34, intake valve by a, starting
B35 and valve B43 opens intake valve A33 and exhaust valve B36, starts speed type blower 1 and speed type vacuum pump 5, gas is successively
Absorber A31 is flowed by surge tank A21, control valve A22, intake valve A33；
Control valve A22 and control valve B42 aperture are gradually increased by b, current stabilization, and absorber A31 pressure increases to 100-
140kpa.A, absorber B32 pressure are gradually decreased to 40-70kpa.A, are then turned on valve A23 and valve B43；
C produces oxygen, and gas successively passes through valve A23 and intake valve A33 enters absorber A31, nitrogen, carbon dioxide in gas,
Water is adsorbed the absorption of the adsorbent in device A31, and output oxygen gradually decreases the aperture of control valve A22, the control before operating condition changes
Valve A22 aperture reaches 5-20%, and it is to close valve A23 when the variation of adsorption separation unit operating condition and mention that aperture, which reaches 5-20%,
Preceding adjusting control valve A22 is to suitable aperture, after operating condition variation, flow through control valve A22 flow be declared working condition 50% ~
Between 150%, the pressure of speed type blower 1 and absorber A31 are controlled in 120-150kpa.A；
D, vacuum, while step C, the gas adsorbed in absorber B32 successively passes through exhaust valve B36 and valve B43 is fast
Rate formula vacuum pump 5 is extracted out, and the aperture of control valve B42 is gradually decreased, and control valve B42 aperture reaches 5-20% before operating condition changes, and is opened
Degree reach 5-20% be when the variation of adsorption separation unit operating condition, close valve B43 and in advance adjusting control valve B42 to suitable
Aperture, operating condition variation after, flow through control valve B42 flow be declared working condition 50% ~ 150% between, speed type vacuum pump 5
It controls with the pressure of absorber B32 in 30-60kpa.A,
Valve A23 and intake valve A33, exhaust valve B36 and valve B43 are closed in e, switching, open exhaust valve A34 and intake valve
B35, gas successively pass through speed type blower 1, surge tank A21, control valve A22 and intake valve B35 and enter absorber B32, absorption
Device B32 pressure gradually increases, and it is fast that the gas in absorber A31 successively passes through exhaust valve A34, control valve B42, surge tank B41
Rate formula vacuum pump 5 is extracted out, and absorber A31 pressure gradually decreases;
F, current stabilization, control valve A22 and control valve B42 aperture are gradually increased, and absorber B32 pressure increases to 100-140kpa.A,
Absorber A31 pressure is gradually decreased to 40-70kpa.A, is then turned on valve A23 and valve B43；
G produces oxygen, and gas successively passes through valve A23 and intake valve B35 enters absorber B32, nitrogen, carbon dioxide in gas,
Water is adsorbed the absorption of the adsorbent in device B32, and output oxygen gradually decreases the aperture of control valve A22, the control before operating condition changes
Valve A22 aperture reaches 5-20%, and it is to close valve A23 when the variation of adsorption separation unit operating condition and mention that aperture, which reaches 5-20%,
Preceding adjusting control valve A22 is to suitable aperture, after operating condition variation, flow through control valve A22 flow be declared working condition 50% ~
Between 150%, the pressure of absorber B32 is controlled in 120-150kpa.A,
H, vacuum, while step g, the gas adsorbed in absorber A31 successively passes through exhaust valve A34 and valve B43 is fast
Rate formula vacuum pump 5 is extracted out, and the aperture of control valve B42 is gradually decreased, and control valve B42 aperture reaches 5-20% before operating condition changes, and is opened
Degree reach 5-20% be when the variation of adsorption separation unit operating condition, close valve B43 and in advance adjusting control valve B42 to suitable
Aperture, operating condition variation after, flow through control valve B42 flow be declared working condition 50% ~ 150% between, the pressure of absorber A31
It is strong to control in 30-60kpa.A,
Valve A23, intake valve B35, exhaust valve A34 and valve B43 are closed in i, switching, open intake valve A33 and exhaust valve B36,
Gas successively passes through speed type blower 1, surge tank A21, control valve A22, intake valve A33 and enters absorber A31, absorber A31
Pressure gradually increases, and it is true by speed type that the gas in absorber B32 successively passes through exhaust valve B36, control valve B42, surge tank B41
5 extraction of sky pump, absorber B32 pressure gradually decrease;
J, circulation repeat step b to i, circuit sequentially work.
Increase surge tank A21, control valve A22 and valve A23 by exporting in speed type blower 1, when outlet pressure is unexpected
It,, can be pre- in advance when pressure fluctuates according to the aperture of pressure-adjusting control valve A22 before closing valve A21 when reduction
Adjusting is surveyed and carries out, to eliminate the influence of valve event time lag bring, the inlet flow rate and speed of fan condition control unit 2
Rate formula 1 rate of discharge of blower is equal, in this way, the pressure of surge tank A21 is kept constant namely 1 rate of discharge pressure of speed type blower
Power is kept constant, meanwhile, by increasing surge tank B41, control valve B52 and valve B43 in 4 import of speed type vacuum pump, when
When inlet pressure increases suddenly, before closing valve B43, according to the aperture of pressure-adjusting control valve B43, optimal situation is to lead to
The flow for crossing control valve B43 is equal to vacuum pump inlet flow rate, and the pressure of surge tank B43 is kept constant namely speed type vacuum pump 5
Inlet flow rate pressure is kept constant, and then guarantees the stationarity of inlet pressure and outlet pressure, is conducive to adsorption operations, simultaneously
Reduce the loss of product oxygen, guarantees that the distribution of the oxygen concentration inside absorber mentions to increase the yield of product oxygen
The high efficiency of adsorption operations, reduces energy consumption, has saved cost, in the product gas that cleaning process utilizes, the overwhelming majority will not
It is taken away by vacuum pump, controls the pressure oscillation variation of speed type blower 1 and speed type vacuum pump 5, reduce noise, the vibration of equipment
Dynamic big and energy consumption reduces the noise and energy consumption of system, while control valve A22 to create condition using efficient centrifugal equipment
And control valve B42 control its flow be initial standard-sized sheet flow 120% between, to pressure change gas to the effect slowed down, effectively
Prevent pressure from hurried fluctuating change occurs, so that pressure change greatly reduce to speed type blower and speed type vacuum pump
It influences.
By the way that valve is arranged side by side convenient for the gas absorption conversion of control absorber A31 and absorber B32, production effect is improved
Rate, using multiple absorbers, when an absorber damages, other absorbers can work on, and equipment is avoided to stop working
Bring loss.
By flow regulating and controlling valve door, when there is no fan condition control unit 2 and vacuum pump operating conditions unit 4,
120% flow can also be automatically controlled, the utilization of equipment is reduced, reduce production cost and reduces equipment occupation space.
By any appropriate open degree between 110%, to pressure change gas to the effect slowed down, maximally efficient is prevented
Hurried fluctuating change occurs for pressure, so that pressure change greatly reduce to the shadow of speed type blower 1 and speed type vacuum pump 5
It rings, effect is best.
By using centrifugation apparatus, its usual pressure ratio is 1.3 ~ 3.0 or so, when periodic wave can be presented in oxygen process flow processed
Dynamic, high speed centrifugation compressor carries out active adjusting, to that can have lesser impact to equipment, improves the bulk life time of equipment and reliable
Property, for another example, when needing to reduce production oxygen load, on large-scale oxygenerator, it is able to use frequency conversion equipment and adjusts load, it can only be to more
Remaining oxygen emptying, to cause unnecessary waste.
By multiple control valve A22 and control valve B42, to control its aperture, realizes and control its stream by gas
Rate.
By this method step, the 2-20% aperture of control valve A22 and control valve B42 is controlled, control valve A is passed the gas through
Flow rate be that while the flow rate for passing the gas through control valve B is by valve in 50 ~ 150% ranges by valve A22 flow rate
In 50 ~ 150% ranges of B42 flow rate, so that delaying switching is the time of pressure increase and decrease, guaranteed rate formula blower and absorber it
Between pressure value keep the pressure value for reducing absorber and speed type vacuum pump always to change, reduce the fluctuation of pressure.
Control control valve A22 and control valve B42 reaches 2% aperture.
Control control valve A22 and control valve B42 reaches 20% aperture.
Control control valve A22 and control valve B42 reaches 10% aperture.
The control valve A22 model DN800, the control valve A22 points of control valves for four model DN200, four
A control valve is set side by side, can by open one, two, three or four control valve, to control the aperture of control valve A,
Make the flow rate for controlling it by gas.
The control valve B42 is DN800, the control valve B42 point for four model DN200 control valve, four
Control valve is set side by side, and can be made by opening one, two, three or four control valve to control the aperture of control valve A
Control its flow rate by gas.
The vibration of equipment is reduced by damper, reduces noise, and drawing arrow is gas flow.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " first ", " second " or position are closed
System for be based on the orientation or positional relationship shown in the drawings or the invention product using when the orientation or position usually put
Relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (8)
1. a kind of vacuum pressure swing adsorption system for oxygen production, including speed type blower (1), adsorption separation unit (3) and speed type vacuum
It pumps (5), it is characterised in that: be connected with fan condition between the air inlet and speed type blower (1) of the adsorption separation unit (3)
Control unit (2) is connected with vacuum pump condition between the exhaust outlet and speed type vacuum pump (5) of the adsorption separation unit (3)
Control unit (4)；
The fan condition control unit (2) includes surge tank A(21), control valve A(22) and valve A(23), surge tank A(21)
Be arranged in series by pipeline and control valve A(22), the surge tank A(21) and control valve A(22) series connection after with valve A(23) simultaneously
Connection setting；
The vacuum pump operating conditions unit (4) includes surge tank B(41), control valve B(42) and valve B(43), the control
Valve B(42) be arranged in series with surge tank B(41) by pipeline, the surge tank B(41) and control valve B(42) connect after with valve
B(43 it) is arranged in parallel；
The control valve A(22) and control valve B(42) be opened into suitable aperture be control the valve of specific gas flow rate from 50 ~
Any appropriate open degree between 150%.
2. a kind of vacuum pressure swing adsorption system for oxygen production as described in claim 1, it is characterised in that: the adsorption separation unit
(3) include at least two absorbers, the absorber includes absorber A(31) and absorber B(32), the absorber A(31)
On be connected with intake valve A(33) and exhaust valve A(34), the intake valve A(33) and exhaust valve A(34) be arranged side by side, the suction
Adnexa B(32) on be connected with intake valve B(35) and exhaust valve B(36), the intake valve B(35) and exhaust valve B(36) set side by side
Set, the intake valve A(33) and intake valve B(35) connect with fan condition control unit (2), the exhaust valve A(34) and
Exhaust valve B(36) it is connect with vacuum pump operating conditions unit (4).
3. a kind of vacuum pressure swing adsorption system for oxygen production as claimed in claim 2, it is characterised in that: the intake valve A(33), row
Air valve A(34), intake valve B(35) and exhaust valve B(36) be flow regulating and controlling valve door.
4. a kind of vacuum pressure swing adsorption system for oxygen production as described in claim 1, it is characterised in that: the control valve A(22) and
Control valve B(42) to be opened into suitable aperture be to control the valve of specific gas flow rate from any appropriate unlatching between 90-110%
Degree.
5. a kind of vacuum pressure swing adsorption system for oxygen production as described in claim 1, it is characterised in that: the speed type blower (1)
Including centrifugal blower, single-stage high-speed centrifugation, blower Multi-stage centrifugal fan, axial fan, turbine blower.
6. a kind of vacuum pressure swing adsorption system for oxygen production as described in claim 1, it is characterised in that: the speed type vacuum pump
It (14) include centrifugal vacuum pump, single-stage high-speed centrifugal vacuum pump, multistage centrafugal vacuum pump, axial flow-type vacuum pump, turbine vacuum
Pump.
7. a kind of vacuum pressure swing adsorption system for oxygen production as described in claim 1, it is characterised in that: the control valve A(22) be
It is multiple, and be arranged in parallel, the control valve B(42) it is multiple, and be arranged in parallel.
8. a kind of vacuum pressure swing adsorption method, it is characterised in that: the following steps are included:
A, starting, by the preset aperture of control valve A(22) and control valve B(42) be 2-20%, closing valve A(23), exhaust valve A
(34), intake valve B(35) and valve B(43), open intake valve A(33) and exhaust valve B(36), starting speed type blower (1) and
Speed type vacuum pump (5), gas successively passes through surge tank A(21), control valve A(22), intake valve A(33) flow into absorber A
(31)；
Control valve A(22) and control valve B(42) aperture is gradually increased, absorber A(31 by b, current stabilization) pressure increases to 100-
140kpa.A, absorber B(32) pressure is gradually decreased to 40-70kpa.A, it is then turned on valve A(23) and valve B(43)；
C produces oxygen, and gas successively passes through valve A(23) and intake valve A(33) into absorber A(31), nitrogen in gas, two
Carbonoxide, water are adsorbed device A(31) in adsorbent absorption, output oxygen gradually decreases control valve A(22) aperture, in work
Control valve A(22 before condition changes) aperture reaches 5-20%, and it is to close when the variation of adsorption separation unit operating condition that aperture, which reaches 5-20%,
Valve A(23) and adjusting control valve A(22 in advance) to suitable aperture flow through control valve A(22 after operating condition variation) and stream
Amount be declared working condition 50% ~ 150% between, speed type blower (1) and absorber A(31) pressure control in 120-
150kpa.A；
D, vacuum, while step C, absorber B(32) in the gas that adsorbs successively pass through exhaust valve B(36) and valve B
(43) by speed type vacuum pump (5) extract out, gradually decrease control valve B(42) aperture, operating condition change before control valve B(42) open
Degree reaches 5-20%, and it is to close valve B(43 when the variation of adsorption separation unit operating condition that aperture, which reaches 5-20%) and adjust in advance
Control valve B(42) to suitable aperture, after operating condition variation, flow through control valve B(42) flow be declared working condition 50% ~
Between 150%, speed type vacuum pump (5) and absorber B(32) pressure control in 30-60kpa.A,
E, switching, close valve A(23) and intake valve A(33), exhaust valve B(36) and valve B(43), unlatching exhaust valve A(34)
With intake valve B(35), gas successively passes through speed type blower (1), surge tank A(21), control valve A(22) and intake valve B(35)
Gradually increased into absorber B(32), absorber B(32) pressure, absorber A(31) in gas successively pass through exhaust valve A
(34), control valve B(42), surge tank B(41) extracted out by speed type vacuum pump (5), absorber A(31) pressure gradually decreases;
F, current stabilization, control valve A(22) and control valve B(42) aperture is gradually increased, absorber B(32) pressure increases to 100-
140kpa.A, absorber A(31) pressure is gradually decreased to 40-70kpa.A, it is then turned on valve A(23) and valve B(43)；
G produces oxygen, and gas successively passes through valve A(23) and intake valve B(35) into absorber B(32), nitrogen in gas, two
Carbonoxide, water are adsorbed device B(32) in adsorbent absorption, output oxygen gradually decreases control valve A(22) aperture, in work
Control valve A(22 before condition changes) aperture reaches 5-20%, and it is to close when the variation of adsorption separation unit operating condition that aperture, which reaches 5-20%,
Valve A(23) and adjusting control valve A(22 in advance) to suitable aperture flow through control valve A(22 after operating condition variation) and stream
Amount is absorber B(32 between the 50% ~ 150% of declared working condition) pressure control in 120-150kpa.A,
H, vacuum, while step g, absorber A(31) in the gas that adsorbs successively pass through exhaust valve A(34) and valve B
(43) by speed type vacuum pump (5) extract out, gradually decrease control valve B(42) aperture, operating condition change before control valve B(42) open
Degree reaches 5-20%, and it is to close valve B(43 when the variation of adsorption separation unit operating condition that aperture, which reaches 5-20%) and adjust in advance
Control valve B(42) to suitable aperture, after operating condition variation, flow through control valve B(42) flow be declared working condition 50% ~
Between 150%, absorber A(31) pressure control in 30-60kpa.A,
I, switching, close valve A(23), intake valve B(35), exhaust valve A(34) and valve B(43), unlatching intake valve A(33) and
Exhaust valve B(36), gas successively passes through speed type blower (1), surge tank A(21), control valve A(22), intake valve A(33) enter
Absorber A(31), absorber A(31) pressure gradually increases, absorber B(32) and in gas successively pass through exhaust valve B(36), control
Valve B(42 processed), surge tank B(41) extracted out by speed type vacuum pump (5), absorber B(32) pressure gradually decreases;
J, circulation repeat step b to i, circuit sequentially work.
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