CN207439004U - A kind of air separation cooling box for producing pure oxygen and low purity oxygen - Google Patents
A kind of air separation cooling box for producing pure oxygen and low purity oxygen Download PDFInfo
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- CN207439004U CN207439004U CN201721396721.4U CN201721396721U CN207439004U CN 207439004 U CN207439004 U CN 207439004U CN 201721396721 U CN201721396721 U CN 201721396721U CN 207439004 U CN207439004 U CN 207439004U
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Abstract
The utility model belongs to Cryogenic air separation technical field, particularly relate to a kind of air separation cooling box for producing pure oxygen and low purity oxygen, primarily to overcome the shortcomings of conventional art, the device that a kind of separating air and making of new structure configuration takes liquid oxygen nitrogen product is provided, the booster expansion turbine that the air separation cooling box is mainly made of by one expanding end and pressurized end, one supercharger aftercooler, one main heat exchanger, one includes heat exchanger channels subcooler, one liquid oxygen evaporator, one lower tower, one upper tower, one main condenser evaporator for being connected to lower top of tower and upper tower bottom, one pure oxygen tower comprising reboiler forms, it is connected with each other between each equipment by corresponding pipeline；The production pure oxygen of the structure setting and the air separation cooling box of low purity oxygen have the ability of pure oxygen and low purity oxygen simultaneously, while can have relatively low air compressor machine row pressure, equipment is reliable, and low energy consumption with by-product part low-pressure nitrogen.
Description
Technical field
The utility model belongs to Cryogenic air separation technical field；Particularly relate to a kind of production pure oxygen and low purity oxygen
Air separation cooling box.
Background technology
In the industries such as steel, chemical fertilizer, glass, largely need low purity oxygen or pure oxygen, or both while need；It obtains at present
The Normal practice for obtaining pure oxygen or low purity oxygen is using the double column cryogenic rectifier unit with main condenser evaporator；However conventional double tower essence
Method is evaporated due to temperature difference requirement necessary to by the requirement of low pressure tower bottom oxygen product purity and main condenser evaporator, the behaviour of lower tower
Make pressure it has been determined that along with air from air compressor machine exports to the on-way resistance into lower tower entrance, the row pressure of air compressor machine is also with regard to one
It is fixed, low device is required especially for oxygen purity, the pressure at expulsion of air compressor machine is with regard to low；It is produced in double column cryogenic rectifying low pure
Pure oxygen tower generally may be employed in the device of oxygen and produce pure oxygen, the bottom of pure oxygen tower is generally arranged using from purified air compressor machine
Gas makees heat source and heats pure liquid oxygen to make its evaporation, yet with the air compressor machine pressure determined by low purity oxygen purity may cause air and
Without heat transfer temperature difference between pure liquid oxygen, so the reboiler of pure oxygen tower bottom may can not work, the rectifying operating mode of pure oxygen tower is with regard to nothing
Method is established.
The content of the invention
The goal of the invention of the utility model：
Primarily to overcoming drawbacks described above, a kind of separating air and making of new structure configuration is provided and takes liquid oxygen nitrogen product
Device.
The technical solution of the utility model is：
A kind of air separation cooling box for producing pure oxygen and low purity oxygen is provided, the air separation cooling box is mainly by one by expanding end（11）
And pressurized end（12）The booster expansion turbine of composition（1）, a supercharger aftercooler（2）, a main heat exchanger（3）, one
A subcooler（4）, a liquid oxygen evaporator（5）, a lower tower（6）, a upper tower（7）, one be connected to lower top of tower and on
The main condenser evaporator of tower bottom（8）, one include reboiler（91）Pure oxygen tower（9）Composition；In supercharger aftercooler
It is provided with pressurized air heat exchanger channels one（21）, pure oxygen heat exchanger channels one（22）, dirty nitrogen heat exchanger channels one（23）, nitrogen heat exchange it is logical
Road one（24）With low purity oxygen heat exchanger channels one（25）；Expanded air heat exchanger channels are respectively arranged in main heat exchanger（31）, it is empty
Gas heat exchanger channels（32）, pure oxygen heat exchanger channels two（33）, pressurized air heat exchanger channels two（34）, dirty nitrogen heat exchanger channels two（35）、
Nitrogen heat exchanger channels two（36）With low purity oxygen heat exchanger channels two（37）；Oxygen-enriched liquid air heat exchanger channels are respectively arranged in subcooler
（41）, lean solution sky heat exchanger channels（42）, liquid nitrogen heat exchanger channels（43）, dirty nitrogen heat exchanger channels three（44）With nitrogen heat exchanger channels three
（45）.
Set on the liquid oxygen evaporator there are one low pure liquid oxygen import, the outlet of lower purity oxygen, an air into
Mouth and a lean solution Air Export.
Air intlet and oxygen-enriched liquid air outlet are respectively arranged in the bottom of lower tower；Two are respectively arranged in the middle part of lower tower
A lean solution sky import and a lean solution Air Export；Nitrogen outlet and liquid nitrogen import are respectively arranged at the top of lower tower.
The bottom of upper tower is provided with lower purity oxygen import；Be respectively arranged in the middle and lower part of upper tower oxygen-enriched liquid air import and
Expanded air import；Lean solution sky import is provided in the middle part of upper tower；Dirty nitrogen outlet is provided in the middle and upper part of upper tower；In Shang Ta
Top be respectively arranged with liquid nitrogen import and nitrogen outlet.
In main condenser evaporator（8）There are one nitrogen inlet, a liquid nitrogen outlet and two low pure liquid oxygen outlets for upper setting.
The top of the pure oxygen tower sets there are one low pure liquid oxygen imports and a lower purity oxygen to export；In pure oxygen tower
Bottom is provided with pure oxygen outlet.
Liquid oxygen outlet is provided in the bottom of reboiler；Air intlet is also respectively provided on reboiler and lean solution is vacated
Mouthful.
Lower tower is punished from lean solution sky entrance location as two rectifying sections.
Upper tower is from oxygen-enriched liquid air entrance location, at lean solution sky entrance location, dirty nitrogen exit position be divided into four rectifying
Section.
The beneficial effects of the utility model are：
（1）Air separation cooling box that is provided by the utility model while producing pure oxygen and low purity oxygen has while produces pure oxygen and low
The ability of pure oxygen, while can be with by-product part low-pressure nitrogen.
（2）Air separation cooling box that is provided by the utility model while producing pure oxygen and low purity oxygen uses the increasing of air expansion driven
Pressure side improves air pressure to meet the temperature difference demand of the pure liquid oxygen of pure oxygen tower bottom evaporation, can be while pure oxygen is produced
Ensure relatively low air compressor machine pressure, the operation energy consumption of equipment is also just low.
（3）The separation of tower, pure oxygen tower is wanted in air separation cooling box that is provided by the utility model while producing pure oxygen and low purity oxygen
Ask relatively low, therefore upper tower, the theoretical cam curve of pure oxygen tower are less, height is relatively low, when equipment once puts into more complete production pure oxygen more
It is low.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
In figure；1 is booster expansion turbine；11 be booster expansion turbine expanding end；12 increase for booster expansion turbine
Pressure side；2 be supercharger aftercooler；3 be main heat exchanger；4 be subcooler；5 be liquid oxygen evaporator；6 be lower tower；7 be upper tower；8
For main condenser/evaporator；9 be pure oxygen tower；91 be reboiler；21 be pressurized air heat exchanger channels one；22 be pure oxygen heat exchanger channels
One；23 be dirty nitrogen heat exchanger channels one；24 be nitrogen heat exchanger channels one；25 be low purity oxygen heat exchanger channels one；31 change for expanded air
The passage of heat；32 be air heat-exchange passage；33 be pure oxygen heat exchanger channels two；34 be pressurized air heat exchanger channels two；35 change for dirty nitrogen
The passage of heat two；36 be nitrogen heat exchanger channels two；37 be low purity oxygen heat exchanger channels two；41 be oxygen-enriched liquid air heat exchanger channels；42 be poor
Liquid air heat exchanger channels；43 be liquid nitrogen heat exchanger channels；44 be dirty nitrogen heat exchanger channels three；45 be nitrogen heat exchanger channels three.
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.
As shown in Figure 1, providing air separation cooling box that is a kind of while producing pure oxygen and low purity oxygen, the air separation cooling box is mainly by one
Platform is by expanding end（11）And pressurized end（12）The booster expansion turbine of composition（1）, a supercharger aftercooler（2）, one
Main heat exchanger（3）, a subcooler（4）, a liquid oxygen evaporator（5）, a lower tower（6）, a upper tower（7）, a connection
In lower top of tower and the main condenser evaporator of upper tower bottom（8）, one include reboiler（91）Pure oxygen tower（9）Composition；Increasing
Pressurized air heat exchanger channels one are provided in press aftercooler（21）, pure oxygen heat exchanger channels one（22）, dirty nitrogen heat exchanger channels one
（23）, nitrogen heat exchanger channels one（24）With low purity oxygen heat exchanger channels one（25）；Expanded air is respectively arranged in main heat exchanger
Heat exchanger channels（31）, air heat-exchange passage（32）, pure oxygen heat exchanger channels two（33）, pressurized air heat exchanger channels two（34）, dirty nitrogen
Heat exchanger channels two（35）, nitrogen heat exchanger channels two（36）With low purity oxygen heat exchanger channels two（37）；It is respectively arranged in subcooler
Oxygen-enriched liquid air heat exchanger channels（41）, lean solution sky heat exchanger channels（42）, liquid nitrogen heat exchanger channels（43）, dirty nitrogen heat exchanger channels three（44）With
Nitrogen heat exchanger channels three（45）.
Set on the liquid oxygen evaporator there are one low pure liquid oxygen import, the outlet of lower purity oxygen, an air into
Mouth and a lean solution Air Export.
Air intlet and oxygen-enriched liquid air outlet are respectively arranged in the bottom of lower tower；Two are respectively arranged in the middle part of lower tower
A lean solution sky import and a lean solution Air Export；Nitrogen outlet and liquid nitrogen import are respectively arranged at the top of lower tower.
The bottom of upper tower is provided with lower purity oxygen import；Be respectively arranged in the middle and lower part of upper tower oxygen-enriched liquid air import and
Expanded air import；Lean solution sky import is provided in the middle part of upper tower；Dirty nitrogen outlet is provided in the middle and upper part of upper tower；In Shang Ta
Top be respectively arranged with liquid nitrogen import and nitrogen outlet.
In main condenser evaporator（8）There are one nitrogen inlet, a liquid nitrogen outlet and two low pure liquid oxygen outlets for upper setting.
The top of the pure oxygen tower sets there are one low pure liquid oxygen imports and a lower purity oxygen to export；In pure oxygen tower
Bottom is provided with pure oxygen outlet.
Liquid oxygen outlet is provided in the bottom of reboiler；Air intlet is also respectively provided on reboiler and lean solution is vacated
Mouthful.
Lower tower is punished from lean solution sky entrance location as two rectifying sections.
Upper tower is from oxygen-enriched liquid air entrance location, at lean solution sky entrance location, dirty nitrogen exit position be divided into four rectifying
Section.
Implement specific with during pipe arrangement, the pure air pipeline from known molecular sieve purification technology is divided into
Three tunnels respectively with booster expansion turbine（1）Pressurized end（12）Import, main heat exchanger expanded air heat exchanger channels（31）And master
Heat exchanger air heat-exchange passage（32）Import connects, the outlet of expanding machine pressurized end again successively with supercharger aftercooler pressurizing air
Gas heat exchanger channels one（21）, main heat exchanger pressurized air heat exchanger channels two（34）, pure oxygen tower reboiler（91）Air intake connect
It is connected together；Main heat exchanger expanded air heat exchanger channels（31）Outlet again successively with booster expansion turbine（1）Expanding end
（11）, upper tower expanded air import link together, main heat exchanger air heat-exchange passage（32）Outlet again respectively with liquid oxygen
Evaporator（5）Air intlet, the air intlet of lower tower links together；The lean solution Air Export and liquid oxygen of pure oxygen tower reboiler steam
Two lean solution sky imports of the lean solution Air Export of device then with lower tower are sent out to be respectively connected together；The oxygen-rich liquid of lower tower bottom is vacated
Mouth, subcooler（4）The oxygen-enriched liquid air imports of oxygen-enriched liquid air heat exchanger channels (41), upper tower be sequentially connected, the lean solution in the middle part of lower tower
Air Export successively with subcooler lean solution sky heat exchanger channels（42）, upper tower lean solution sky import link together, the nitrogen of lower top of tower
Gas outlet is connected with the nitrogen inlet of main condenser evaporator, the liquid nitrogen of main condenser evaporator export then respectively with the liquid nitrogen of lower tower into
Mouth, subcooler liquid nitrogen heat exchanger channels（43）Import links together, the liquid nitrogen heat exchanger channels of subcooler（43）Outlet then finally connects
The up liquid nitrogen import of top of tower；Nitrogen heat exchanger channels three of the nitrogen outlet of upper top of tower through subcooler（45）With main heat exchanger
Nitrogen heat exchanger channels two（36）, supercharger aftercooler nitrogen heat exchanger channels one（24）It is sequentially connected, finally through supercharger
The nitrogen heat exchanger channels one of aftercooler（24）Outlet conduit is sent to user, dirty nitrogen dirt of the outlet through subcooler of upper tower middle and upper part
Nitrogen heat exchanger channels three（44）With the dirty nitrogen heat exchanger channels two of main heat exchanger（35）It is sequentially connected, in main heat exchanger dirt nitrogen heat exchanger channels
One（23）It is divided into two-way on outlet conduit, all the way the dirty nitrogen heat exchanger channels one through supercharger aftercooler（23）It is sent to by pipeline
Water cooling tower in the nitrogen precooling system of known technology, another way are routed directly in the sieve purification system of known technology
Electric heater；It is low pure with liquid oxygen evaporator and pure oxygen tower respectively positioned at two of main condenser base of evaporator low pure liquid oxygen outlets
Liquid oxygen import links together, and the top low purity oxygen of liquid oxygen evaporator exports the then low purity oxygen heat exchanger channels two with main heat exchanger
（37）, supercharger aftercooler low purity oxygen heat exchanger channels one（25）It is sequentially connected, finally through the low pure of supercharger aftercooler
Oxygen heat exchanger channels outlet conduit is sent to user, and the bottom of liquid oxygen evaporator is connected with loxygen discharge pipeline；Pure oxygen top of tower it is low
The low purity oxygen import that pure oxygen exports with upper tower bottom links together, and the pure oxygen of bottom then passes through pipeline and the pure oxygen of main heat exchanger
Heat exchanger channels two（33）, supercharger aftercooler pure oxygen heat exchanger channels one（22）It is sequentially connected, finally through supercharger postcooling
The low purity oxygen heat exchanger channels one of device（22）Outlet conduit is sent to user, and loxygen discharge is also associated in the bottom of pure oxygen tower reboiler
Pipeline.
To produce oxygen-containing~85% 12000 side of marking of low purity oxygen per hour ,~99.6% 3000 side of marking of pure oxygen, by-product is oxygen-containing
17300 side of marking of nitrogen of≤10ppmO2, liquid oxygen evaporator discharge the low pure liquid oxygen in 100 mark sides, pure oxygen tower reboiler bottom discharge 30
Exemplified by the air separation cooling box of the pure liquid oxygen in mark side:
It is divided into three parts come the air compressor machine pressure at expulsion for known molecular sieve purification technical finesse of hanging oneself for 4.35bar (A)：One
The expanded machine pressurized end in part improves pressure and is cooled to close to liquid to 5.06bar (A) and through supercharger aftercooler, main heat exchanger
The pure liquid oxygen moisture evaporation of heat source heating is done after after change point in the reboiler of feeding pure oxygen tower bottom and obtains purity oxygen, its own is by liquid
Lower tower is sent into after change；A part is cooled to certain temperature through main heat exchanger and is expanded into from middle part extraction feeding expanding end close to upper tower
After operating pressure rectifying is participated in into upper tower；Rest part divides two-way after main heat exchanger cools down, and is sent into liquid oxygen evaporator all the way
Make heat source heating it is oxygen-containing~85% low pure liquid oxygen makes its evaporation obtain lower purity oxygen, its own is sent into lower tower participation after being liquefied
Rectifying, another way are then sent directly into rising gas of the lower tower as lower tower.Oxygen-containing~85% low purity oxygen obtained in liquid oxygen evaporator
Finally user is sent to through main heat exchanger, supercharger aftercooler.
The operating pressure of lower tower is 4.2bar (A), in lower tower, liquid nitrogen, liquid oxygen evaporator from main condenser evaporator
Liquid air, the liquid air of pure oxygen tower reboiler, the air of main heat exchanger through cryogenic rectification, obtained in bottom it is oxygen-containing~34% it is oxygen-enriched
Liquid air and the pure nitrogen gas at top, while also extract that oxygen-containing~21% lean solution is empty, and oxygen-enriched liquid air, lean solution space division are not passed through at middle part
Upper tower is sent into after cooler.
The operating pressure of upper tower is 1.35bar (A), in upper tower, lower purity oxygen and liquid nitrogen from main condenser evaporator,
The lower purity oxygen of pure oxygen tower, the oxygen-enriched liquid air of lower tower and lean solution are empty, and the expanded air after expanding machine is separated through cryogenic rectification, the bottom of at
Portion obtains oxygen-containing~85% low pure liquid oxygen, and middle and upper part obtains dirty nitrogen, top obtains nitrogen.Bottom obtain it is oxygen-containing~85%
Low pure liquid oxygen is most of to be sent into main condenser evaporator by rising gas of the vaporized nitrogen of lower top of tower as upper tower, a part
Liquid oxygen evaporator obtains low purity oxygen, and a part is sent into pure oxygen tower and obtains pure oxygen.The nitrogen and dirty nitrogen obtained in upper tower finally passes through
Subcooler, main heat exchanger, supercharger aftercooler send out ice chest, and wherein nitrogen can be routed directly to user, and a dirty nitrogen part exists
The sieve purification system that known technology is sent to after main heat exchanger does regeneration gas, remaining send known technology through supercharger aftercooler
Nitrogen precooling system in recycle cold.
The operating pressure of pure oxygen tower is 1.4bar (A), in pure oxygen tower, low pure liquid oxygen from main condenser evaporator with again
The pure oxygen caloic evaporated exchanges bottom and obtains oxygen-containing~99.6% pure liquid oxygen in boiling device, and top obtains oxygen-containing~78.2% low
Purity oxygen, the pure liquid oxygen from pure oxygen tower bottom is most of to heat vaporization by the air from expanding machine pressurized end, most of to make
For the rising gas of pure oxygen tower, as pure oxygen product, pure oxygen tower bottom is to prevent that hydrocarbon aggregation extraction one is small for remaining extraction
Part discharge ice chest.The purity oxygen that pure oxygen tower bottom obtains finally is sent to user through main heat exchanger, supercharger aftercooler.
Claims (9)
1. a kind of air separation cooling box for producing pure oxygen and low purity oxygen, it is characterised in that:The air separation cooling box is mainly by one by expanding end
（11）And pressurized end（12）The booster expansion turbine of composition（1）, a supercharger aftercooler（2）, a main heat exchanger
（3）, a subcooler（4）, a liquid oxygen evaporator（5）, a lower tower（6）, a upper tower（7）, one be connected to lower tower top
Portion and the main condenser evaporator of upper tower bottom（8）, one include reboiler（91）Pure oxygen tower（9）Composition；It is cold after supercharger
But pressurized air heat exchanger channels one are provided in device（21）, pure oxygen heat exchanger channels one（22）, dirty nitrogen heat exchanger channels one（23）, nitrogen
Heat exchanger channels one（24）With low purity oxygen heat exchanger channels one（25）；Expanded air heat exchanger channels are respectively arranged in main heat exchanger
（31）, air heat-exchange passage（32）, pure oxygen heat exchanger channels two（33）, pressurized air heat exchanger channels two（34）, dirty nitrogen heat exchanger channels
Two（35）, nitrogen heat exchanger channels two（36）With low purity oxygen heat exchanger channels two（37）；Oxygen-enriched liquid air is respectively arranged in subcooler
Heat exchanger channels（41）, lean solution sky heat exchanger channels（42）, liquid nitrogen heat exchanger channels（43）, dirty nitrogen heat exchanger channels three（44）It exchanges heat with nitrogen
Passage three（45）.
2. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1, it is characterised in that：The liquid oxygen
Low pure liquid oxygen import, a lower purity oxygen outlet, an air intlet and a lean solution Air Export there are one being set on evaporator.
3. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1, it is characterised in that：At the bottom of lower tower
Portion is respectively arranged with air intlet and oxygen-enriched liquid air outlet；Two lean solution sky imports and one are respectively arranged in the middle part of lower tower
Lean solution Air Export；Nitrogen outlet and liquid nitrogen import are respectively arranged at the top of lower tower.
4. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1, it is characterised in that：At the bottom of upper tower
Portion is provided with lower purity oxygen import；Oxygen-enriched liquid air import and expanded air import are respectively arranged in the middle and lower part of upper tower；Upper
Lean solution sky import is provided in the middle part of tower；Dirty nitrogen outlet is provided in the middle and upper part of upper tower；It is respectively arranged at the top of upper tower
Liquid nitrogen import and nitrogen outlet.
5. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1, it is characterised in that：It is steamed in main condenser
Send out device（8）There are one nitrogen inlet, a liquid nitrogen outlet and two low pure liquid oxygen outlets for upper setting.
6. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1, it is characterised in that：The pure oxygen
The top of tower sets there are one low pure liquid oxygen imports and a lower purity oxygen to export；The bottom of pure oxygen tower is provided with pure oxygen to go out
Mouthful.
7. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 6, it is characterised in that：In reboiler
Bottom is provided with liquid oxygen outlet；Air intlet and lean solution Air Export are also respectively provided on reboiler.
8. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1 or 3, it is characterised in that：Lower tower is certainly
The punishment of lean solution sky entrance location is two rectifying sections.
9. a kind of air separation cooling box for producing pure oxygen and low purity oxygen according to claim 1 or 4, it is characterised in that：Upper tower is certainly
At oxygen-enriched liquid air entrance location, at lean solution sky entrance location, dirty nitrogen exit position be divided into four rectifying sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396721.4U CN207439004U (en) | 2017-10-26 | 2017-10-26 | A kind of air separation cooling box for producing pure oxygen and low purity oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396721.4U CN207439004U (en) | 2017-10-26 | 2017-10-26 | A kind of air separation cooling box for producing pure oxygen and low purity oxygen |
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| Publication Number | Publication Date |
|---|---|
| CN207439004U true CN207439004U (en) | 2018-06-01 |
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ID=62294016
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721396721.4U Active CN207439004U (en) | 2017-10-26 | 2017-10-26 | A kind of air separation cooling box for producing pure oxygen and low purity oxygen |
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| CN (1) | CN207439004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759310A (en) * | 2018-06-23 | 2018-11-06 | 浙江智海化工设备工程有限公司 | A kind of small-sized deep cooling double tower equipment of making nitrogen and method |
-
2017
- 2017-10-26 CN CN201721396721.4U patent/CN207439004U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759310A (en) * | 2018-06-23 | 2018-11-06 | 浙江智海化工设备工程有限公司 | A kind of small-sized deep cooling double tower equipment of making nitrogen and method |
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