CN202254635U - Air separation system - Google Patents
Air separation system Download PDFInfo
- Publication number
- CN202254635U CN202254635U CN2011202607792U CN201120260779U CN202254635U CN 202254635 U CN202254635 U CN 202254635U CN 2011202607792 U CN2011202607792 U CN 2011202607792U CN 201120260779 U CN201120260779 U CN 201120260779U CN 202254635 U CN202254635 U CN 202254635U
- Authority
- CN
- China
- Prior art keywords
- air
- cold junction
- pipeline
- discharge tube
- nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- 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
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
- F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
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- 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
- F25J3/04406—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 dual pressure main column system
- F25J3/04412—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 dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
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- 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
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- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
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- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being nitrogen
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- 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being oxygen
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model relates to an air separation system comprising a precooler, a separator, an adsorber, a heat exchanger, an expansion machine and an air separation tower which are connected in sequence, wherein the air separation tower is connected with the heat exchanger via a cold-end gas pipeline, and a discharge pipeline is set on the cold-end gas pipeline. The air separation system according to the utility model can excellently control temperature of air entering the expansion machine.
Description
Technical field
The utility model relates to air cryogenic separation field, particularly a kind of structure of air-seperation system.
Background technology
At present, along with the quickening of process of industrialization, air cryogenic separation equipment is widely used in a lot of fields.But the startup of each space division system need consume great amount of time, and decompressor is the equipment of main refrigeration in space division system.The operating parameters various aspects are required very strictness,, do not allow at decompressor arrival end air to liquid owing to run up; Liquid air impinges upon on the impeller of the decompressor that rotates at a high speed; Can cause impeller to damage, decompressor can not be run well, influence is produced normally.
When air separation column normally moved, the cryogenic gas and just flowing to the tower air of backflowing in the tower carried out heat exchange in main heat exchanger.The drag flow air themperature is reduced gradually, and the gas temperature that backflows raises gradually, carries out cold recovery, is in poised state.But when the cold standby of intermitten service started, because between down period, no air advances tower, and the cryogenic gas that cryogenic liquid is evaporated in the tower was constantly discharged outside the tower through heat exchanger, thereby makes heat exchanger be in supercooled state.When cold started decompressor, air got into heat exchanger, and superfluous cold possibly cause air behind heat exchanger, directly to become liquid state, made liquid air get into decompressor, caused decompressor to damage, and became the difficult problem that the boundary of domestic outer space is all puzzled.
The utility model content
The purpose of the utility model is to provide a kind of air-seperation system that can control the air themperature that gets into decompressor.
To achieve these goals, the technical scheme of the utility model is following:
A kind of air-seperation system comprises the forecooler, separator, absorber, heat exchanger, decompressor and the air separation column that connect successively, and wherein air separation column is connected with heat exchanger through the cold junction gas pipeline, on the said cold junction gas pipeline discharge tube is set.
Preferably; Said cold junction gas pipeline comprises cold junction oxygen channel, cold junction nitrogen pipeline and the impure nitrogen pipeline of cold junction, the nitrogen discharge pipeline that said discharge tube comprises the oxygen discharge tube that is connected with the cold junction oxygen channel, be communicated with the cold junction nitrogen pipeline, and the impure nitrogen discharge pipeline that is connected with the impure nitrogen pipeline of cold junction.
Preferably, said discharge tube is provided with by-pass valve control.
Preferably, said discharge tube is processed by copper or stainless steel.
The utility model air-seperation system respectively adds a discharge tube on three gas pipelines of heat exchanger cold junction; Then can the cold of surplus be discharged to the external world with discharge tube; Thereby the cold in the control heat exchanger; And then can effectively control the temperature of decompressor intake air, and prevent air liquefaction before the machine, guarantee the decompressor safe and stable operation.Shorten and emptyly to divide cold standby start-up time, reduce energy consumption.Low and the easy operating of the utility model cost.
Description of drawings
Fig. 1 is the structural representation of the air-seperation system of the utility model.
The specific embodiment
Please with reference to Fig. 1, air-seperation system comprises the forecooler 1 that connects successively, separator 2, absorber 3, heat exchanger 4,5, decompressor 6, and air separation column 7.Wherein air separation column 7 is connected with heat exchanger 5 through cold junction gas pipeline 8,9,10, on this cold junction gas pipeline 8,9,10 discharge tube 11,12,13 is set.Said cold junction gas pipeline comprises the impure nitrogen pipeline 10 of cold junction oxygen channel 8, cold junction nitrogen pipeline 9 and cold junction, the nitrogen discharge pipeline 12 that said discharge tube comprises the oxygen discharge tube 11 that is connected with cold junction oxygen channel 8, be communicated with cold junction nitrogen pipeline 9, and the impure nitrogen discharge pipeline 13 said discharge tubes 11,12,13 that are connected with the impure nitrogen pipeline 10 of cold junction be provided with by-pass valve control 14.Said discharge tube 11,12,13 is processed by copper or stainless steel.
Please with reference to Fig. 1, air gets into air separation column 7 through forecooler 1, separator 2, absorber 3, decompressor 6 again after overcompression.Wherein forecooler 1 is reduced to air themperature below 10 ℃.Absorber 3 is removed airborne moisture and carbon dioxide.Air is after air separation column 7 separates, and a part forms liquid oxygen and liquid nitrogen is collected in liquid oxygen jar and the liquid nitrogen container.Another part forms oxygen, nitrogen and purity nitrogen not, is delivered to heat exchanger 5 through cold junction oxygen channel 8, the impure nitrogen pipeline 9 of cold junction and cold junction nitrogen pipeline 10.Wherein oxygen, nitrogen store with the gas mode, and purity nitrogen is not delivered in the absorber 3 and circulates.
The utility model air-seperation system respectively adds a discharge tube 11,12,13 on the cold junction gas pipeline 8,9,10 that heat exchanger 5 is connected with air separation column 7; Then can the cold of surplus be discharged to the external world with discharge tube 11,12,13; Thereby the cold in the control heat exchanger 5; And then can effectively control the temperature of decompressor 6 intake airs, and prevent air liquefaction before the machine, guarantee decompressor 6 safe and stable operations.
The above specific embodiment only is used to explain the utility model, but not is used to limit the utility model.
Claims (4)
1. air-seperation system; Comprise the forecooler (1), separator (2), absorber (3), heat exchanger (4), decompressor (5) and the air separation column (7) that connect successively; Wherein air separation column (7) is connected with heat exchanger (5) through cold junction gas pipeline (8,9,10), it is characterized in that: discharge tube (11,12,13) is set on the said cold junction gas pipeline (8,9,10).
2. air-seperation system as claimed in claim 1; It is characterized in that: said cold junction gas pipeline comprises cold junction oxygen channel (8), cold junction nitrogen pipeline (9) and the impure nitrogen pipeline of cold junction (10), the nitrogen discharge pipeline (12) that said discharge tube comprises the oxygen discharge tube (11) that is connected with cold junction oxygen channel (8), be communicated with cold junction nitrogen pipeline (9), and the impure nitrogen discharge pipeline (13) that is connected with the impure nitrogen pipeline of cold junction (10).
3. according to claim 1 or claim 2 air-seperation system, it is characterized in that: said discharge tube is provided with by-pass valve control (14).
4. according to claim 1 or claim 2 air-seperation system, it is characterized in that: said discharge tube is processed by copper or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202607792U CN202254635U (en) | 2011-07-22 | 2011-07-22 | Air separation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202607792U CN202254635U (en) | 2011-07-22 | 2011-07-22 | Air separation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202254635U true CN202254635U (en) | 2012-05-30 |
Family
ID=46115868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202607792U Expired - Fee Related CN202254635U (en) | 2011-07-22 | 2011-07-22 | Air separation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202254635U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823597A (en) * | 2017-04-18 | 2017-06-13 | 山东钢铁股份有限公司 | A kind of filter and air-separating plant |
| US12038230B2 (en) | 2020-09-29 | 2024-07-16 | Air Products And Chemicals, Inc. | Chiller, air separation system, and related methods |
-
2011
- 2011-07-22 CN CN2011202607792U patent/CN202254635U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823597A (en) * | 2017-04-18 | 2017-06-13 | 山东钢铁股份有限公司 | A kind of filter and air-separating plant |
| US12038230B2 (en) | 2020-09-29 | 2024-07-16 | Air Products And Chemicals, Inc. | Chiller, air separation system, and related methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20160722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |