CN108759308A - A kind of skid-mounted type Internal-compression flow air separation plant - Google Patents
A kind of skid-mounted type Internal-compression flow air separation plant Download PDFInfo
- Publication number
- CN108759308A CN108759308A CN201810656009.6A CN201810656009A CN108759308A CN 108759308 A CN108759308 A CN 108759308A CN 201810656009 A CN201810656009 A CN 201810656009A CN 108759308 A CN108759308 A CN 108759308A
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- Prior art keywords
- rectifying
- tower
- air
- heat exchanger
- plate heat
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04781—Pressure changing devices, e.g. for compression, expansion, liquid pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04787—Heat exchange, e.g. main heat exchange line; Subcooler, external reboiler-condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/42—Nitrogen or special cases, e.g. multiple or low purity N2
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
Abstract
A kind of skid-mounted type Internal-compression flow air separation plant, it includes an air compressor, a final stage vapor-water cooling device and vertical type adsorption device；The final stage vapor-water cooling device is made into precooling sled block, and vertical type adsorption device is made into purifying sled block；It further includes：One plate heat exchanger, first strand of pure air enter the expanding end of the high temperature expander to connect below after plate heat exchanger cooling；Air after expansion enters tower under connected rectifying after returning the further cooling of plate heat exchanger；Second strand of pure air enters the cryogenic expansion machine expanding end to connect below after plate heat exchanger cooling；Air after expansion also enters tower under connected rectifying；Third stock pure air is sent directly into the pressurized end of the high temperature expander and cryogenic expansion machine that are sequentially connected, and after entering connected plate heat exchanger, tower under connected rectifying is sent into after throttling；One by tower in tower under rectifying, rectifying and between the rectifying column that constitutes of condenser/evaporator, certain pressure oxygen and nitrogen product and a certain proportion of liquid oxygen and liquid nitrogen product can be produced simultaneously in rectifying column.
Description
Technical field
The present invention relates to a kind of skid-mounted type Internal-compression flow air separation plants, belong to cryogenic rectification method and detach oxygen processed
Field.
Background technology
Due to the uncertainty and fluctuation of the industries such as steel, chemical industry gas scale, the actual gas consumption of user and space division
Design scale often have deviation so that space division is often run under off-design operating mode, and economy and energy consumption are all undesirable,
Investment risk is also relatively high.Some projects are gone out before oxygen due to gas supply cycle anxiety and vaporize gas supply with liquid, increased cost.For
It is preferable to solve the problems, such as this, need to design it is a kind of meet scene flexibly with gas and gas supply cycle it is short can skid sky
Separating device.
The relevant device of air separation unit is subjected to the vision that skid design represents always Air separation industry.This skid
Formula air separation unit interface is clear, and the interface between each sled block is relatively easy, can integral installation or resettlement, be effectively shortened existing
Field construction period.And equipment is pre-assembled before manufacture, reduces the processes such as making in site, welding, is convenient for quality control.
Although the advantage of skid-mounted type air separation unit is clearly, due to by the limitations such as technology and traffic condition, the country
The skid design of ice chest is concentrated mainly on to the research of skid-mounted type space division, it is less to the research of related process flow.
Invention content
It is an object of the invention to overcome the shortcomings of the prior art, and one kind is provided and is carried out in prior art basis
It is improved, certain pressure oxygen and nitrogen product and a certain proportion of liquid oxygen and liquid nitrogen product can be produced simultaneously, make product knot
Structure is more rich, the higher skid-mounted type Internal-compression flow air separation plant of economy.
The purpose of the present invention is by following technical solution to complete, a kind of skid-mounted type Internal-compression flow air separation plant,
It includes that one raw air can be compressed to the air compressor of convenient pressure, and one is connected to the subsequent final stage gas of air compressor
Water cooler and be connected to final stage vapor-water cooling device it is subsequent, can be by switching the vertical type adsorption device that use；The final stage
Vapor-water cooling device is made into precooling sled block, and vertical type adsorption device is made into purifying sled block；It further includes：
One plate heat exchanger, first strand of pure air enter the high-temperature expansion to connect below after plate heat exchanger cooling
The expanding end of machine；Air after expansion enters tower under connected rectifying after returning the further cooling of plate heat exchanger；Second strand
Pure air enters the cryogenic expansion machine expanding end to connect below after plate heat exchanger cooling；Air after expansion
Tower under into connected rectifying；
Third stock pure air is sent directly into the pressurized end of the high temperature expander and cryogenic expansion machine that are sequentially connected, is connected entering
Plate heat exchanger after, the cooling and tower in the case where being sent into connected rectifying after throttling；
One by tower in tower under rectifying, rectifying and between the rectifying column that constitutes of condenser/evaporator, wherein the top of tower under rectifying
Liquid nitrogen outlet pipe is connected, a part of liquid nitrogen is therefrom extracted, plate heat exchanger is entered after liquid nitrogen pump pressurizes, cooling box after re-heat obtains
To the nitrogen product of certain pressure；
Liquid air outlet pipe is arranged in the bottom of tower under rectifying, so that liquid air tower in rectifying is made further rectifying through connecting tower in rectifying,
And the bottom of tower obtains liquid oxygen product in rectifying, a part of liquid oxygen enters plate heat exchanger, re-heat after liquid oxygen pump pressurizes
Cooling box afterwards obtains the oxygen product of certain pressure；The bottom of tower also obtains one in the top of tower and rectifying in rectifying simultaneously
The liquid nitrogen and liquid oxygen of certainty ratio.
As preferred：The air compressor is made into compressor sled block, and high temperature expander and cryogenic expansion machine are made
Block is prized at an expanding machine ice chest, the rectifying column is made into rectifying column ice chest sled block, and each sled block structure is basis
The space division scale of limitation, the design of traffic condition prizes block size accordingly to determine.
The oxygen and nitrogen and a certain proportion of liquid oxygen and liquid nitrogen of energy of the invention while output certain pressure, meanwhile, pass through
Process optimization designs, and reduces space division and moves device configuration, equipment size is more suitable for skid design.
The present invention is the improvement carried out in prior art basis, by designing suitable raw material air compressor machine row pressure, uses gas
After water cooler replaces air cooling compressor, air compressor machine row pressure to improve, absorber may be designed to the smaller vertical skid knot of volume
Structure；Eliminate the large-scale dynamic equipment such as air booster, oxygen compressor and nitrogen compressor.
It has can produce certain pressure oxygen and nitrogen product and a certain proportion of liquid oxygen and liquid nitrogen product simultaneously,
Keep product structure more rich, the features such as economy higher.
Description of the drawings
Fig. 1 is skid-mounted type Internal-compression flow air separation plant flow diagram of the present invention.
Specific implementation mode
Below in conjunction with attached drawing, the present invention will be described in detail：Shown in Fig. 1, a kind of skid-mounted type internal pressure of the present invention
Contracting flow air separation plant, it includes that one raw air can be compressed to the air compressor 1 of convenient pressure, and one is connected to air pressure
1 subsequent final stage vapor-water cooling device of contracting machine and be connected to final stage vapor-water cooling device it is subsequent, can by switching use it is vertical
Absorber；The final stage vapor-water cooling device is made into precooling sled block 2, and vertical type adsorption device is made into purifying sled block 3；It is also wrapped
It includes：
One plate heat exchanger 4, it is swollen that first strand of pure air enters the high temperature to connect below after the cooling of the plate heat exchanger 4
The expanding end of swollen machine 5；Air after expansion enters tower 6 under connected rectifying after returning the further cooling of plate heat exchanger 4；The
Two strands of pure airs enter 7 expanding end of cryogenic expansion machine to connect below after the cooling of the plate heat exchanger 4；After expansion
Air also enters tower 6 under connected rectifying；
Third stock pure air is sent directly into the pressurized end of the high temperature expander 5 and cryogenic expansion machine 7 that are sequentially connected, into phase
After plate heat exchanger 4 even, the cooling and tower in the case where being sent into connected rectifying after throttling；
One by tower 10 in tower under rectifying 6, rectifying and between the rectifying column that constitutes of condenser/evaporator, wherein the tower 6 under rectifying
Top connects liquid nitrogen outlet pipe, therefrom extracts a part of liquid nitrogen, and plate heat exchanger is entered after liquid nitrogen pump pressurizes, is gone out after re-heat cold
Case obtains the nitrogen product of certain pressure；
Liquid air outlet pipe is arranged in the bottom of tower 6 under rectifying, so that liquid air tower 10 in rectifying is made further through connecting tower 10 in rectifying
Rectifying, and the bottom of tower 10 obtains liquid oxygen product in rectifying, a part of liquid oxygen enters plate-type heat-exchange after liquid oxygen pump pressurizes
Device 4, cooling box after re-heat obtain the oxygen product of certain pressure；The tower 10 in the top of tower 10 and rectifying in rectifying simultaneously
Bottom also obtains a certain proportion of liquid nitrogen and liquid oxygen.
As preferred embodiment, air compressor 1 of the present invention is made into compressor sled block, high temperature expander 5
It is made into expanding machine ice chest with cryogenic expansion machine 7 and prizes block, the rectifying column is made into rectifying column ice chest sled block, and described each
Sled block structure is that corresponding sled block size is determined according to the space division scale of the limitation of traffic condition, design.
Embodiment：Shown in Fig. 1, raw air is compressed to 1.6MPa after filtering by air compressor 1, is prized into precooling
Block 2 is cooled to 10 degree, enters plate heat exchanger 4 after being purified by purifying sled block 3.Portion of air is cooled down through plate heat exchanger 4
- 95 degree are expanded into high temperature expander 5 after to -45 degree, enter lower tower 6 after exchanging heat using plate heat exchanger 4.It is a part of empty
Gas enters lower tower 6 after plate heat exchanger 4 is cooled to -135 degree after being expanded into -170 degree into cryogenic expansion machine 7.Remaining air
Enter plate heat exchanger 4 after the pressurized end 8 of high/low temperature expanding machine is pressurized to 2.6MP, enters after throttling using throttle valve 9
Lower tower 6.In 10 top output liquid nitrogen of upper tower, the re-heat cooling box after liquid nitrogen pump 11 is pressurized to 1.0MPa.It is produced in 10 bottom of upper tower
Go out liquid oxygen, the re-heat cooling box after liquid oxygen pump 12 is pressurized to 1.0MPa.Meanwhile distinguishing output in upper top of tower and bottom and centainly comparing
Example liquid nitrogen and liquid oxygen.
Claims (2)
1. a kind of skid-mounted type Internal-compression flow air separation plant, it includes that one raw air can be compressed to the air pressure of convenient pressure
Contracting machine（1）, one is connected to air compressor（1）It subsequent final stage vapor-water cooling device and is connected to behind final stage vapor-water cooling device
, can be by switching the vertical type adsorption device that use；It is characterized in that：The final stage vapor-water cooling device is made into precooling sled block
（2）, and vertical type adsorption device is made into purifying sled block（3）；It further includes：
One plate heat exchanger（4）, first strand of pure air is by the plate heat exchanger（4）Enter the height to connect below after cooling
Warm expanding machine（5）Expanding end；Air after expansion returns plate heat exchanger（4）Further enter connected rectifying after cooling
Lower tower（6）；Second strand of pure air passes through the plate heat exchanger（4）Enter the cryogenic expansion machine to connect below after cooling（7）
Expanding end；Air after expansion also enters tower under connected rectifying（6）；
Third stock pure air is sent directly into the high temperature expander being sequentially connected（5）And cryogenic expansion machine（7）Pressurized end, into
Enter connected plate heat exchanger（4）Afterwards, the cooling and tower in the case where being sent into connected rectifying after throttling；
One by tower under rectifying（6）, tower in rectifying（10）The rectifying column that condenser/evaporator between and is constituted, wherein in rectifying
Lower tower（6）Top connects liquid nitrogen outlet pipe, therefrom extracts a part of liquid nitrogen, and plate heat exchanger, re-heat are entered after liquid nitrogen pump pressurizes
Cooling box afterwards obtains the nitrogen product of certain pressure；
The tower under rectifying（6）Bottom be arranged liquid air outlet pipe, through connect rectifying on tower（10）Make liquid air tower in rectifying（10）Make
Further rectifying, and the tower in rectifying（10）Bottom obtain liquid oxygen product, a part of liquid oxygen enters after liquid oxygen pump pressurizes
Plate heat exchanger（4）, cooling box after re-heat obtains the oxygen product of certain pressure；The tower in rectifying simultaneously（10）Top and
Tower in rectifying（10）Bottom also obtain a certain proportion of liquid nitrogen and liquid oxygen.
2. skid-mounted type Internal-compression flow air separation plant according to claim 1, it is characterised in that the air compressor
（1）It is made into compressor sled block, high temperature expander（5）And cryogenic expansion machine（7）It is made into expanding machine ice chest sled block, the essence
It evaporates tower and is made into rectifying column ice chest sled block, and each sled block structure is advised according to the space division of limitation, the design of traffic condition
Mould prizes block size accordingly to determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810656009.6A CN108759308A (en) | 2018-06-23 | 2018-06-23 | A kind of skid-mounted type Internal-compression flow air separation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810656009.6A CN108759308A (en) | 2018-06-23 | 2018-06-23 | A kind of skid-mounted type Internal-compression flow air separation plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108759308A true CN108759308A (en) | 2018-11-06 |
Family
ID=63976477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810656009.6A Pending CN108759308A (en) | 2018-06-23 | 2018-06-23 | A kind of skid-mounted type Internal-compression flow air separation plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108759308A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260594A (en) * | 2019-07-05 | 2019-09-20 | 浙江智海化工设备工程有限公司 | A kind of product nitrogen gas process units and its method |
| WO2021016756A1 (en) * | 2019-07-26 | 2021-02-04 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and apparatus for the separation of air by cryogenic distillation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3447332A (en) * | 1967-07-13 | 1969-06-03 | Genrikh Maxovich Basin | Air separation employing separated nitrogen as heat exchange fluid in liquid oxygen pump jacket |
| CN204637913U (en) * | 2015-03-24 | 2015-09-16 | 杭州锦华气体设备有限公司 | A kind of skid-mounted type purification system of air separation plant |
| CN206176890U (en) * | 2016-08-19 | 2017-05-17 | 浙江智海化工设备工程有限公司 | Compression air separation device in low energy consumption |
| CN208536494U (en) * | 2018-06-23 | 2019-02-22 | 浙江智海化工设备工程有限公司 | Skid-mounted type Internal-compression flow air separation plant |
-
2018
- 2018-06-23 CN CN201810656009.6A patent/CN108759308A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3447332A (en) * | 1967-07-13 | 1969-06-03 | Genrikh Maxovich Basin | Air separation employing separated nitrogen as heat exchange fluid in liquid oxygen pump jacket |
| CN204637913U (en) * | 2015-03-24 | 2015-09-16 | 杭州锦华气体设备有限公司 | A kind of skid-mounted type purification system of air separation plant |
| CN206176890U (en) * | 2016-08-19 | 2017-05-17 | 浙江智海化工设备工程有限公司 | Compression air separation device in low energy consumption |
| CN208536494U (en) * | 2018-06-23 | 2019-02-22 | 浙江智海化工设备工程有限公司 | Skid-mounted type Internal-compression flow air separation plant |
Non-Patent Citations (1)
| Title |
|---|
| 苏卫等: "5000m3/h 空分设备整装冷箱的研究开发" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260594A (en) * | 2019-07-05 | 2019-09-20 | 浙江智海化工设备工程有限公司 | A kind of product nitrogen gas process units and its method |
| WO2021016756A1 (en) * | 2019-07-26 | 2021-02-04 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and apparatus for the separation of air by cryogenic distillation |
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Address after: No. 280 Xingye Road, Leidian Town, Deqing County, Huzhou City, Zhejiang Province, 313219 Applicant after: Yingde Gas Engineering (Zhejiang) Co.,Ltd. Address before: 313219 Jingyi Road, Deqing Linhang Industrial Zone, LEIDIAN Town, Deqing County, Huzhou City, Zhejiang Province Applicant before: ZHEJIANG ZHIHAI CHEMICAL EQUIPMENT ENGINEERING Co.,Ltd. |