CN105399063A - Combined high pressure nitrogen purification equipment - Google Patents
Combined high pressure nitrogen purification equipment Download PDFInfo
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- CN105399063A CN105399063A CN201510898655.XA CN201510898655A CN105399063A CN 105399063 A CN105399063 A CN 105399063A CN 201510898655 A CN201510898655 A CN 201510898655A CN 105399063 A CN105399063 A CN 105399063A
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Abstract
The invention discloses combined high pressure nitrogen purification equipment, which comprises a membrane separation nitrogen producing unit and a high pressure PSA (pressure swing adsorption) nitrogen producing and purification unit in pipeline connection with the membrane separation nitrogen producing unit. The high pressure PSA nitrogen producing and purification unit consists of two pressure-swing absorbers in parallel connection. The inner cavity of each pressure-swing absorber is separated into an upper part and a lower part by a sieve plate, wherein the upper part is filled with a molecular sieve and the lower part is filled with porcelain balls. The top and/or bottom of the pressure-swing absorber inner cavity is provided with a gas disperser, wherein the top disperser is connected to a pressure equalizing pipeline, and the bottom disperser is buried in the porcelain balls and is connected to a low purity nitrogen pipeline. The invention makes full use of the characteristic of preparation of high purity nitrogen by the pressure swing adsorption process, purifies the nitrogen produced by membrane separation nitrogen producing equipment at a pressure of about 1.7MPa and a purity of 90%-95% to nitrogen with purity of more than 99%. The whole equipment has the advantages of compact structure, reasonable layout, strong operational reliability and high safety.
Description
Technical field
The present invention relates to high pressure high pure nitrogen preparation apparatus field, particularly a kind of combined high-voltage nitrogen purification equipment.
Background technology
Existing nitrogen preparation apparatus has membrane separation nitrogen generating device and low pressure PSA making nitrogen by pressure swing adsorption.Membrane separation nitrogen generating device is generally made up of air compressor, oxygen nitrogen separating device and two portions.Air compressor core component is screw-type compressor, will be transported to oxygen nitrogen separating device after supercharging air.Utilize the characteristic of hollow-fibre membrane to be separated by oxygen nitrogen, obtain the nitrogen that pressure is higher.PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE is generally made up of air compressor, PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE two portions.Air compressor core component is screw-type compressor, will be transported to PSA making nitrogen by pressure swing adsorption after supercharging air.Utilize the characteristic of molecular sieve, by making nitrogen by pressure swing adsorption technique, oxygen nitrogen is separated, obtains the nitrogen that pressure is higher.
Film nitrogen separating device and the PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE key distinction are oxygen nitrogen separate part.
One, the general pressure of nitrogen that film nitrogen separating device exports can arrive 1.6MPa, and purity is about 95%.The speed producing passing nitrogen is fast, and pressure is high, but purity is lower.
Two, the general pressure of nitrogen that PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE exports is 0.8MPa, and purity is more than 99%.The speed producing nitrogen is general.
Known by contrasting above, the nitrogen gas purity that membrane separation nitrogen generating device produces is generally 95%, can not meet the nitrogen gas purity requirement of oxygen concn highstrung place.If want purity to be adjusted to more than 99%, device fabrication cost is high.
The nitrogen gas purity that common PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE produces can reach more than 99%, but its output nitrogen pressure is lower, increases the burden of rear class supercharging equipment.Originally the air supply of needs is large.Along with the progress of sieve technology, the compressed air require of needs declines to some extent.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, provides that a kind of technique is simple, facility investment is few and it is high-purity to obtain, the combined high-voltage nitrogen purification equipment of high pressure nitrogen.
Principle of the present invention is: existing membrane separation nitrogen generation system combined with PSA pressure varying adsorption nitrogen making system, the air inlet of PSA pressure varying adsorption nitrogen making system is changed into membrane separation nitrogen generation system obtain lower purified nitrogen gas (pressurized air simultaneously giving up existing PSA pressure varying adsorption nitrogen making system front end is produced and treatment facility), by pressure-variable adsorption principle by pure for lower purified nitrogen air lift be high pure nitrogen.
The technical scheme of combined high-voltage nitrogen purification equipment is: the high pressure P SA making nitrogen by pressure swing adsorption purifier units comprising film separation and nitrogen-making unit and be connected with its pipeline; Described high pressure P SA making nitrogen by pressure swing adsorption purifier units comprises two pressure-swing absorbers in parallel.
Because existing pressure-swing absorber is all applicable to low pressure adsorbent operating mode (the general pressure of nitrogen of output is about 0.8MPa), and the nitrogen pressure that in the present invention, membrane separation nitrogen generation system obtains is usually at about 1.7MPa, therefore this just determines pressure-swing absorber design effort pressure in the present invention is about 2.0MPa (high pressure P SA making nitrogen by pressure swing adsorption purifier units design adsorptive pressure 1.5MPa≤P≤2.2MPa).Therefore need existing common pressure-swing absorber to improve, carry out less high pressure gas to the impact of molecular sieve uniform gas simultaneously.A kind of preferred version below proposed by the present invention is obtained high pressure nitrogen purification PSA pressure-swing absorber, its technical scheme is: comprise two pressure-swing absorbers in parallel, between the high pure nitrogen pipeline that every platform pressure-swing absorber comprises tower body and the lower purified nitrogen gas pipeline that connects bottom it and oxygen rich vent pipeline, top connect and two towers and the equaler line connect, every platform pressure-swing absorber inner chamber is all spaced apart upper and lower two portions by sieve plate, and its middle and upper part is filled with molecular sieve, under-filledly has porcelain ball; Top and/or the bottom of described pressure-swing absorber inner chamber are provided with gas distributor, and wherein the gas distributor at top is connected with equaler line, the gas distributor of bottom to be embedded in porcelain ball and to be connected with lower purified nitrogen gas pipeline.Namely by bottom adsorption tower or top or the two be equipped with decollator, make the air inlet of lower purified nitrogen gas and all press operation time high pressure gas dispersions do not impact molecular sieve; Bottom admission passage is embedded in porcelain ball simultaneously, makes gas dispersion uniform further and play the effect cushioning high pressure gas.
Preferably, described gas distributor is damping decollator, and described damping decollator adopts multiple spot damp type shower nozzle; Both realized even gas distribution, the impact of high pressure gas to molecular sieve can have been reduced again.
Preferably, described equaler line is provided with damping orifice plate, and damping orifice plate plays throttling action, and the impact of equal pressure gas stream is reduced, and ensures that sifting bed is stablized
Preferably, the lower purified nitrogen gas pipeline of described two pressure-swing absorbers and oxygen rich vent pipeline respectively and connect and share same pipeline and be connected with the gas distributor at the bottom of tower, the high pure nitrogen pipeline of described two pressure-swing absorbers and connect and while as equaler line; Described lower purified nitrogen gas pipeline, oxygen rich vent pipeline and high pure nitrogen pipeline are respectively equipped with control valve.Above-mentioned design concision and compact, saves space.
Combined high-voltage nitrogen purification equipment is purified except nucleus equipment high pressure nitrogen and is used except PSA pressure-swing absorber, also comprise lower purified nitrogen gas tank and High Purity Nitrogen gas tank, the import of described lower purified nitrogen gas tank is connected with the nitrogen outlet pipeline of film separation and nitrogen-making unit, export with two pressure-swing absorbers and the lower purified nitrogen gas pipeline connect is connected; The import of described High Purity Nitrogen gas tank by dust filter unit with two pressure-swing absorbers and the high pure nitrogen pipeline connect be connected.
Described high pressure P SA making nitrogen by pressure swing adsorption purifier units is by electrical control system auto-controll operation.Electrical control system can the parameter such as on-line monitoring pressure, temperature, flow, purity, automated system operation is realized by PLC program, and compression shock reduces greatly (such as when each high pressure nitrogen enters adsorption tower in making pressure swing adsorption system run, there is a setting being interrupted buffering by program, after making tower set up low pressure, input high pressure nitrogen continuously).
The outlet line of described High Purity Nitrogen gas tank connects automatic-discharging system.Electrical control system on-line monitoring nitrogen pressure, flow, purity, nitrogen automatic-discharging when purity is defective; After purity is qualified, input rear class equipment investment uses.
Film separation and nitrogen-making unit belongs to existing routine techniques, can select according to actual needs.The film separation and nitrogen-making unit provided in the present invention comprises air compressor machine, water cooler, air accumulator, multistage filter, electric heater, film group, purity variable valve, nitrogen gas stream gauge, oxygen analyzer, threeway blow-off valve and the check valve etc. that are connected successively by pipeline, and the nitrogen pressure that this film separation and nitrogen-making unit exports controls at 1.7MPa, control of purity at 90-95%.。
Compared with prior art, main advantage of the present invention is:
(1) nitrogen of high pressure (1.5MPa≤P≤2.2MPa), high purity (more than 99%) can be obtained.
(2) the film equipment of making nitrogen produces nitrogen speed soon, and equipment is stablized, and far below adopting the cost of PSA THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE completely, can greatly reduce user's purchase cost.
(3) device structure is simple, and the parts procurement cycle is short, and whole plant is with short production cycle, can realize mass production.
(4) boost after being purified by the high pressure nitrogen that the film equipment of making nitrogen is produced, technical process is reasonable, and interface is simple, and security is high again.
(5) under meeting the condition of equal demand, equipment cost is low, few easy workout part, and overall operation is more reliable, and the market competitiveness is strong.
(6) the high pressure P SA nitrogen equipment for purifying volume be equipped with is little, transports convenience in place.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of high pressure P SA making nitrogen by pressure swing adsorption purifier units;
Fig. 2 is the device layout figure of high pressure P SA making nitrogen by pressure swing adsorption purifier units;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the process flow sheet of film separation and nitrogen-making unit;
Fig. 5 is the structural representation of high pressure nitrogen purification PSA pressure-swing absorber;
In figure: 1. adsorption tower A, 2. adsorption tower B, 3. high pure nitrogen gas exhausting valve, 4. lower purified nitrogen gas air intake control valve, 5. the emptying control valve of oxygen rich gas, 6. dust filter unit, 7. molecular sieve, 8. sieve plate, 9. porcelain ball, 10. bottom damping decollator, 11. damping orifice plates, 12. top damping decollators, 13. electrical control systems, 14. lower purified nitrogen gas tanks, 15. pressure-swing absorbers, 16. piping systems, 17. oxygen rich vent systems, 18. High Purity Nitrogen gas tanks, 19. automatic-discharging systems, 20. threeway blow-off valves, 21. air compressor machines, 22. water coolers, 23. air accumulators, 24. multistage filters, 25. electric heaters, 26. film groups, 27. purity variable valve, 28. nitrogen gas stream gauge, 29. oxygen analyzers, 30. check valves.
Embodiment
1-5 by reference to the accompanying drawings, the invention will be further described.
Embodiment 1
A kind of combined high-voltage nitrogen purification equipment, the high pressure P SA making nitrogen by pressure swing adsorption purifier units comprising film separation and nitrogen-making unit and be connected by high pressure hose with it; High pressure P SA making nitrogen by pressure swing adsorption purifier units comprises the lower purified nitrogen gas tank 14, pressure-swing absorber 15 and the High Purity Nitrogen gas tank 18 that are connected successively by piping system 16, and pressure-swing absorber 15 is parallel with one another two; The nitrogen inlet of film separation and nitrogen-making unit connects lower purified nitrogen gas tank 14, lower purified nitrogen gas tank 14 exports the lower purified nitrogen gas admission line connecting pressure-swing absorber 15, the high pure nitrogen pipeline of pressure-swing absorber 15 connects High Purity Nitrogen gas tank 18, and the outlet of High Purity Nitrogen gas tank 18 is provided with automatic-discharging system; Whole high pressure P SA making nitrogen by pressure swing adsorption purifier units realizes automatic control by electrical control system 13.The principle of work of high pressure P SA making nitrogen by pressure swing adsorption purifier units and operating process substantially identical with existing PSA pressure swing adsorption system, just air inlet is become the nitrogen (lower purified nitrogen atmospheric pressure controls at 1.7MPa, control of purity at 90-95%) of low pure high pressure from air
Film separation and nitrogen-making unit comprises the air compressor machine 21, water cooler 22, air accumulator 23, multistage filter 24, electric heater 25, film group 26, purity variable valve 27, nitrogen gas stream gauge 28, oxygen analyzer 29, threeway blow-off valve 20 and the check valve 30 that are connected successively by pipeline; The operating process of film separation and nitrogen-making unit belongs to prior art, does not repeat them here.
Embodiment 2
Pressure-swing absorber in embodiment 1 is chosen as high pressure nitrogen purification PSA pressure-swing absorber, it comprises two pressure-swing absorbers in parallel and adsorption tower A1 and adsorption tower B2, between the high pure nitrogen pipeline that every platform pressure-swing absorber comprises tower body and the lower purified nitrogen gas pipeline that connects bottom it and oxygen rich vent pipeline, top connect and two towers and the equaler line connect, every platform pressure-swing absorber inner chamber is all spaced apart upper and lower two portions by sieve plate 8, and its middle and upper part is filled with molecular sieve 7, under-filledly has porcelain ball 9; The top of pressure-swing absorber inner chamber and bottom are respectively equipped with top damping decollator 12 and bottom damping decollator 10, and its middle and upper part damping decollator 12 is connected with equaler line, bottom damping decollator 10 is embedded in porcelain ball 9 and be connected with lower purified nitrogen gas pipeline.Equaler line is also provided with damping orifice plate 11.
Embodiment 3
On the basis of embodiment 2, the lower purified nitrogen gas pipeline of two pressure-swing absorbers and oxygen rich vent pipeline respectively and connect and share same pipeline and be connected with bottom damping decollator 10, the high pure nitrogen pipeline of two pressure-swing absorbers and connect and while as equaler line; Lower purified nitrogen gas pipeline, oxygen rich vent pipeline and high pure nitrogen pipeline are respectively equipped with control valve, i.e. high pure nitrogen gas exhausting valve 3, lower purified nitrogen gas air intake control valve 4, the emptying control valve 5 of oxygen rich gas.
The operating process of embodiment 2 and 3 mesohigh nitrogen purification PSA pressure-swing absorber is divided into four-stage, realizes nitrogen purification, be specially with this cycle operation:
First stage: adsorption tower A1 adsorbs, adsorption tower B2 desorb
The emptying control valve 5 of high pure nitrogen gas exhausting valve 3, lower purified nitrogen gas air intake control valve 4, oxygen rich gas controls that adsorption tower A1 is in, and lower purified nitrogen gas enters, high pure nitrogen row, adsorption tower B2 is in oxygen rich gas row's stage, this stage is exactly that adsorption tower A1 adsorbs, adsorption tower B2 desorption phase.
Subordinate phase: adsorption tower A1 all presses to adsorption tower B2
The emptying control valve 5 of high pure nitrogen gas exhausting valve 3, lower purified nitrogen gas air intake control valve 4, oxygen rich gas controls to make adsorption tower A1 after completing absorption, and be input to by high pure nitrogen with pressure in adsorption tower B, this stage is exactly that adsorption tower A1 all presses to adsorption tower B2.
Phase III: adsorption tower B2 adsorbs, adsorption tower A1 desorb
The emptying control valve 5 of high pure nitrogen gas exhausting valve 3, lower purified nitrogen gas air intake control valve 4, oxygen rich gas controls that adsorption tower B2 is in, and lower purified nitrogen gas enters, high pure nitrogen row, adsorption tower A1 is in oxygen rich gas row's stage, this stage is exactly that adsorption tower B2 adsorbs, adsorption tower A1 desorption phase.
Fourth stage: adsorption tower B2 all presses to adsorption tower A1
The emptying control valve 5 of high pure nitrogen gas exhausting valve 3, lower purified nitrogen gas air intake control valve 4, oxygen rich gas controls to make adsorption tower B2 after completing absorption, and be input to by high pure nitrogen with pressure in adsorption tower A1, this stage is exactly that adsorption tower B2 all presses to adsorption tower A1.
Above embodiment mesohigh PSA making nitrogen by pressure swing adsorption purifier units proposes as a unit equipment, and the flow of equipment, purity, pressure are certain.If need the flow of purifying to increase, the quantity of corresponding increase purifier units use can be met.So also be convenient to realize mass production.It is all skid that film separation and nitrogen-making unit and high pressure P SA making nitrogen by pressure swing adsorption are purified single, and centre connects with high pressure hose, is convenient to transport, installs.
Main innovate point of the present invention is:
(1) this unit design adsorptive pressure is 1.5MPa≤P≤2.2MPa, utilizes PSA pressure swing adsorption technique, the nitrogen of production purity more than 99%, 1.7MPa.Existing PSA equipment of making nitrogen adsorptive pressure is below 1.2MPa, can only produce the nitrogen of 1.0MPa pressure.
(2) adsorption tower internal structure belongs to brand-new design, meets design effort pressure 2.0MPa operating mode, and gas distribution is reasonable, compact construction.Lower cover adds porcelain ball and reduces to impact, and upper pipeline to be fallen apart wind by damping decollator.
(3) high pressure P SA nitrogen purifier units is by modular design; According to user's index, multiple unit combination can be become system.
(4) the present invention utilize film separation and nitrogen-making to produce high pressure lower purified nitrogen gas as unstripped gas, through this unit purify after send into rear class supercharging equipment pressurization for user.This technical process can make full use of original film nitrogen separating device, greatly can improve the work-ing life of old equipment.
The foregoing is only better case study on implementation of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be contained within protection scope of the present invention.
Claims (10)
1. a high pressure nitrogen is purified and is used PSA pressure-swing absorber, comprise two pressure-swing absorbers in parallel, between the high pure nitrogen pipeline that every platform pressure-swing absorber comprises tower body and the lower purified nitrogen gas pipeline that connects bottom it and oxygen rich vent pipeline, top connect and two towers and the equaler line connect, it is characterized in that: every platform pressure-swing absorber inner chamber is all spaced apart upper and lower two portions by sieve plate, its middle and upper part is filled with molecular sieve, under-filledly has porcelain ball; Top and/or the bottom of described pressure-swing absorber inner chamber are provided with gas distributor, and wherein the gas distributor at top is connected with equaler line, the gas distributor of bottom to be embedded in porcelain ball and to be connected with lower purified nitrogen gas pipeline.
2. high pressure nitrogen purification PSA pressure-swing absorber according to claim 1, is characterized in that: described gas distributor is damping decollator, and described damping decollator adopts multiple spot damp type shower nozzle.
3. high pressure nitrogen purification PSA pressure-swing absorber according to claim 2, is characterized in that: described equaler line is provided with damping orifice plate.
4. according to the arbitrary described high pressure nitrogen purification PSA pressure-swing absorber of claim 1-3, it is characterized in that: the lower purified nitrogen gas pipeline of described two pressure-swing absorbers and oxygen rich vent pipeline respectively and connect and share same pipeline and be connected with the gas distributor at the bottom of tower, the high pure nitrogen pipeline of described two pressure-swing absorbers and connect and while as equaler line; Described lower purified nitrogen gas pipeline, oxygen rich vent pipeline and high pure nitrogen pipeline are respectively equipped with control valve.
5. a combined high-voltage nitrogen purification equipment, is characterized in that: the high pressure P SA making nitrogen by pressure swing adsorption purifier units comprising film separation and nitrogen-making unit and be connected with its pipeline; Described high pressure P SA making nitrogen by pressure swing adsorption purifier units comprises two pressure-swing absorbers in parallel.
6. combined high-voltage nitrogen purification equipment according to claim 5, is characterized in that: the arbitrary described high pressure nitrogen purification PSA pressure-swing absorber of claim 1-4 selected by described two pressure-swing absorbers in parallel.
7. combined high-voltage nitrogen purification equipment according to claim 6, it is characterized in that: described PSA making nitrogen by pressure swing adsorption purifier units also comprises lower purified nitrogen gas tank and High Purity Nitrogen gas tank, the import of described lower purified nitrogen gas tank is connected with the nitrogen outlet pipeline of film separation and nitrogen-making unit, export with two pressure-swing absorbers and the lower purified nitrogen gas pipeline connect is connected; The import of described High Purity Nitrogen gas tank by dust filter unit with two pressure-swing absorbers and the high pure nitrogen pipeline connect be connected.
8. combined high-voltage nitrogen purification equipment according to claim 6, is characterized in that: described high pressure P SA making nitrogen by pressure swing adsorption purifier units is by electrical control system auto-controll operation.
9. combined high-voltage nitrogen purification equipment according to claim 7, is characterized in that: the outlet line of described High Purity Nitrogen gas tank connects automatic-discharging system.
10., according to the arbitrary described combined high-voltage nitrogen purification equipment of claim 5-9, it is characterized in that: described film separation and nitrogen-making unit comprises the air compressor machine, water cooler, air accumulator, multistage filter, electric heater, film group, purity variable valve, nitrogen gas stream gauge, oxygen analyzer, threeway blow-off valve and the check valve that are connected successively by pipeline.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106185844A (en) * | 2016-07-06 | 2016-12-07 | 合肥良骏汽车材料有限公司 | A kind of nitrogen gas generator produced for roof of the vehicle |
| CN110203892A (en) * | 2019-07-03 | 2019-09-06 | 山东恒业石油新技术应用有限公司 | A kind of hi-temp hi-effective Quick-type THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE and its method for preparing nitrogen |
| CN112142017A (en) * | 2020-09-30 | 2020-12-29 | 西南石油大学 | Nitrogen preparation device based on pressure swing adsorption separation technology |
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| CN110203892A (en) * | 2019-07-03 | 2019-09-06 | 山东恒业石油新技术应用有限公司 | A kind of hi-temp hi-effective Quick-type THE PRESSURE SWING ADSORPTION NITROGEN GENERATING DEVICE and its method for preparing nitrogen |
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Inventor after: Wang Yujun Inventor after: Zheng Fulin Inventor after: Meng Qiaoling Inventor after: Kong Lingmeng Inventor after: Wang Tao Inventor after: Wu Hongbo Inventor after: Dong Yuxin Inventor after: Wang Rude Inventor after: Fang Shaojie Inventor after: Li Jiankui Inventor before: Wang Yujun Inventor before: Meng Qiaoling Inventor before: Zhong Min Inventor before: Kong Lingmeng Inventor before: Hao Jianghong Inventor before: Wang Tao Inventor before: Wang Dalong Inventor before: Wang Rude Inventor before: Fang Shaojie |
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Denomination of invention: Combined high pressure nitrogen purification equipment Effective date of registration: 20190304 Granted publication date: 20170825 Pledgee: Dongying Branch of Bank of Communications Limited Pledgor: Hengye Petroleum New Technology Application Co., Ltd., Shandong Registration number: 2019990000166 |
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Effective date of registration: 20211018 Granted publication date: 20170825 |
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