CN209085176U - Liquid space division device - Google Patents
Liquid space division device Download PDFInfo
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- CN209085176U CN209085176U CN201821962187.3U CN201821962187U CN209085176U CN 209085176 U CN209085176 U CN 209085176U CN 201821962187 U CN201821962187 U CN 201821962187U CN 209085176 U CN209085176 U CN 209085176U
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- air
- nitrogen
- liquid
- rectifying column
- space division
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Abstract
The utility model relates to a kind of liquid space division devices, including rectifying column, air refrigeration cycle system and nitrogen cycle system；Air refrigeration cycle system includes the raw material air compressor machine, circulation air supercharger, supercharging air turbo-expander that rectifying column is then connected to after being sequentially connected by pipeline, further includes the air circulation heat exchanger for realizing air heat exchange；Nitrogen cycle system includes the nitrogen compressor connected by pipeline, the reboiler for being passed through the oxygen-enriched liquid air that rectifying column generates, at least one branch of the nitrogen outlet institute connecting pipe of rectifying column is connected to reboiler after nitrogen compressor, and the liquid nitrogen of reboiler, which is exported, is connected at least one of rectifying column, gas-liquid separator, pure argon column system three by pipeline.The utility model starting process is simple, gas passage displacement blows down that the time is short, and equipment investment is less, and liquid product yield is guaranteed, good operation stability, and the unit power consumption of liquid product decreases when starting.
Description
Technical field
The utility model relates to a kind of upper specification, (liquid product total amount is greater than 3000Nm3/ h) and liquid nitrogen production more than liquid
Air separation unit.
Background technique
In the prior art, the liquid space division device of upper specification is generally using the dress for having high and low temperature booster expansion turbine
It sets and process flow.There are two types of refrigeration cycle for this device and process flow.One is air circulation, main mating machine includes
Raw material air compressor machine, circulation air supercharger, high temperature air booster expansion turbine and Cryogenic air booster expansion turbine.It is another
Kind is nitrogen circulation, and main mating machine includes raw material air compressor machine, low pressure nitrogen compressor, circulating nitrogen gas supercharger, high temperature nitrogen increasing
Press turbo-expander and low temperature nitrogen booster expansion turbine.The advantages of air circulation liquid space division device be mating machine it is few,
Start simple and convenient, investment relatively saves, the disadvantage is that liquid nitrogen production is limited, to be generally less than liquid oxygen yield, and more in liquid nitrogen production
When Argon recovery rate it is lower, liquid argon yield reduce.Then liquid nitrogen production is unrestricted for nitrogen circulation liquid space division device, can be greater than liquid oxygen
Yield, even up to 2.3 ~ 2.5 of liquid oxygen yield times or more, and liquid argon recovery rate and liquid argon yield are substantially unaffected, and are lacked
Point is that device starting process is complex, and it is long to blow down the time for channel of nitrogen gas displacement when starting, and plant investment is more, equipment
Operation stability is poor.
Summary of the invention
The advantages of having both both air circulation and nitrogen circulation the purpose of the utility model is to provide one kind avoids the two from lacking
Point, i.e., elimination starting process is complicated, channel of nitrogen displacement blows down that the time is long, the disadvantage more than plant investment when starting, and guarantees to produce
The upper specification of product yield, liquid nitrogen production is more, liquid space division device of good operation stability.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of liquid space division device, including rectifying column, air refrigeration cycle system and nitrogen cycle system；
The air refrigeration cycle system includes the raw material sky that the rectifying column is then connected to after being sequentially connected by pipeline
Press, circulation air supercharger, supercharging air turbo-expander further include exchanging heat for realizing the air circulation of air heat exchange
Device；
The nitrogen cycle system includes the nitrogen compressor connected by pipeline, is passed through the oxygen-enriched liquid air that the rectifying column generates
Reboiler, at least one branch of the nitrogen outlet institute connecting pipe of the rectifying column be connected to after the nitrogen compressor it is described again
Device is boiled, the liquid nitrogen outlet of the reboiler is connected to the rectifying column, gas-liquid separator by pipeline, in pure argon column system three
At least one.
Preferably, the liquid space division device further includes several for realizing nitrogen heat exchange in the nitrogen cycle system
Nitrogen cycle heat exchanger.
Preferably, the air circulation heat exchanger and the nitrogen cycle heat exchanger are integrated into a main heat exchanger.
Preferably, main condenser evaporator, the main condenser evaporator are provided between the Shang Ta of the rectifying column and lower tower
Liquid nitrogen export at least one of the rectifying column, gas-liquid separator, pure argon column system three be connected to by pipeline.
Preferably, the liquid space division device further includes that several are subcooled for realizing liquid nitrogen in the nitrogen cycle system
Main subcooler.
Preferably, the liquid nitrogen of the reboiler exports connected pipeline and is then connected to institute after the main subcooler
State at least one of rectifying column, gas-liquid separator, pure argon column system three.
Preferably, the nitrogen compressor is low pressure nitrogen compressor or medium pressure nitrogen press.
Preferably, the reboiler is set to the lower tower bottom of the rectifying column or by under pipeline and the rectifying column
Tower is connected.
Preferably, the supercharging air turbo-expander is single expanding machine or the supercharging air turbo-expander is
Single expanding machine with pre-cooler or the supercharging air turbo-expander be include high temperature air booster expansion turbine and
Double expanding machines of Cryogenic air booster expansion turbine.
Between the circulation air supercharger and the supercharging air turbo-expander, the supercharging air turbo-expander
Cooler is provided between the rectifying column.
Since above-mentioned technical proposal is used, the utility model has the advantage that the utility model compared with prior art
The advantages of remaining existing air circulation and nitrogen circulation, both solves the disadvantage that, starting process is simple, gas when starting
The displacement of body channel blows down that the time is short, and equipment investment is less, and liquid product yield is able to guarantee, is stable, and liquid product
Unit power consumption decreases, liquid space division device that be the new upper specification of one kind, that liquid nitrogen production is more.
Detailed description of the invention
Attached drawing 1 is the schematic diagram of the liquid space division device of the utility model.
In the figures above: 1, nitrogen compressor；2, circulation air supercharger；3, cooler；4, high temperature air turbine boosting expands
Machine；5, cooler；6, Cryogenic air booster expansion turbine；7, cooler；8, main heat exchanger；9, subcooler；10, gas-liquid separation
Device；11, main subcooler；12, upper tower；13, main condenser evaporator；14, lower tower；15, reboiler；16, condenser of crude argon tower；17,
Crude argon column.
Specific embodiment
Embodiment shown in reference to the accompanying drawing is further described the utility model.
Embodiment one: as shown in Fig. 1, a kind of liquid space division device, including rectifying column, air refrigeration cycle system and nitrogen
The circulatory system.
Rectifying column includes upper tower 12 and lower tower 14, and is provided with main condenser evaporator 13 between upper tower 12 and lower tower 14.Essence
Evaporating tower can connect pure argon column system, Crude argon column system etc..Such as Crude argon column system shown in Fig. 1, it includes crude argon column 17,
The top of crude argon column 17 is provided with condenser of crude argon tower 16, is connected with pure argon column system (not shown in figure 1).
Air refrigeration cycle system includes passing through the sequentially connected raw material air compressor machine (not shown) of pipeline, circulation air
Supercharger 2, supercharging air turbo-expander, are then then connected to rectifying column, air refrigeration cycle system further include for realizing
The air circulation heat exchanger of air heat exchange, air circulation heat exchanger are a part of main heat exchanger 8.Specifically, supercharging air
Turbo-expander is that perhaps supercharging air turbo-expander is that single expanding machine with pre-cooler or air increase to single expanding machine
Pressure turbo-expander is the double expanding machines for including high temperature air turbine boosting expansion 4 machines and Cryogenic air booster expansion turbine 6.
The third scheme is used in the present embodiment, i.e. supercharging air turbo-expander includes the high temperature air turbine boosting expansion being connected in series
Machine 4 and Cryogenic air booster expansion turbine 6.Between circulation air supercharger 2 and supercharging air turbo-expander, supercharging air
Between turbo-expander and rectifying column (including high temperature air booster expansion turbine 4 and Cryogenic air booster expansion turbine 6 it
Between) it is provided with cooler, respectively cooler 3, cooler 5, cooler 7.
Raw air comes from raw material air compressor machine, after nitrogen-water chilldown system and purification system processing, is sent into circulation air
Supercharger 2 is pressurized.The air of circulation air supercharger 2 is successively divided into two-way after subcooler 3 out, all the way successively through height
Pressurized end, cooler 5, the pressurized end of Cryogenic air booster expansion turbine 6, cooler of warm air booster expansion turbine 4
7, air circulation heat exchanger (i.e. main heat exchanger 8), another way increase through air circulation heat exchanger (i.e. main heat exchanger 8), high temperature air
After the expanding end for pressing turbo-expander 4, circulation air supercharger 2 is sent into together with raw air.The air of cooler 7 is in sky out
It is further divided into two-way in gas circulation heat exchanger (i.e. main heat exchanger 8), all the way after the expanding end of Cryogenic air booster expansion turbine 6
Circulation air supercharger 2 is sent into together with raw air after air circulation heat exchanger (i.e. main heat exchanger 8) again, another way is direct
It is sent into lower tower 14 and carries out rectifying.
Nitrogen cycle system includes nitrogen compressor 1, the reboiler 15 connected by pipeline, further includes that several are followed for realizing nitrogen
The nitrogen cycle heat exchanger of nitrogen heat exchange in loop system, several main subcoolers being subcooled for realizing liquid nitrogen in nitrogen cycle system
11.Air circulation heat exchanger and nitrogen cycle heat exchanger can be respectively independent, can also be integrated.In the present embodiment, air circulation
Heat exchanger and nitrogen cycle heat exchanger are integrated into a main heat exchanger 8.Then at least the one of the nitrogen outlet institute connecting pipe of rectifying column
A branch is connected to reboiler 15 after nitrogen compressor 1, i.e. nitrogen outlet institute's connecting pipe of rectifying column is changed through main subcooler 11, master
After hot device 8, it is divided into Liang Ge branch, a branch exports low-pressure nitrogen, another branch is then after nitrogen compressor 1, using master
Heat exchanger 8 or main subcooler 11 and be connected to reboiler 15, so that a part of nitrogen is pressurized to certain pressure in nitrogen compressor 1
Afterwards, it is admitted in reboiler 15 after certain temperature is as cold as in main heat exchanger 8.The oxygen-enriched of rectifying column generation is passed through in reboiler 15
Liquid air, in reboiler 15, the part nitrogen and oxygen-enriched liquid air exchange heat, and return lower tower 14 after so that oxygen-enriched liquid air is flashed to gas again and join
With rectifying, nitrogen is then condensed into liquid nitrogen.The liquid nitrogen of reboiler 15 exports connected pipeline and connects again after main subcooler 11
It is connected at least one of rectifying column, gas-liquid separator 10, pure argon column system three.Main condenser evaporator 13 also goes out with liquid nitrogen
Mouthful, at least one of rectifying column, gas-liquid separator 10, pure argon column system three are connected to also by pipeline.In this implementation
In example, the liquid nitrogen outlet of reboiler 15 is connected to liquid nitrogen gas-liquid separator 10 after main subcooler 11, thus this part nitrogen
Enter gas-liquid separator 10 after being subcooled in main subcooler 11；And main subcooler 11 is passed through in the liquid nitrogen outlet of main condenser evaporator 13
After be divided into three tunnels, warp knuckle is streamed to going at the top of the upper tower 12 of rectifying column to participate in rectifying all the way, is sent after throttling all the way to pure argon column
System is sent into gas-liquid separator 10 after reducing pressure by regulating flow all the way.Separated in gas-liquid separator 10 to liquid submitting become
The nitrogen of liquid nitrogen product, gas and tower 12 on rectifying column out collaborates.
In the above scheme, nitrogen compressor 1 is low pressure nitrogen compressor or medium pressure nitrogen press, and the capacity of nitrogen compressor 1 depends on institute
It is required that liquid nitrogen production.Reboiler 15 is set to 14 bottom of lower tower of rectifying column or is connected by pipeline with the lower tower 14 of rectifying column
It connects.
It can be by master in addition, the oxygen-enriched liquid air of the lower tower 14 of rectifying column exports, liquid nitrogen fraction exports connected pipeline
Subcooler 11 keeps the oxygen-enriched liquid air for obtaining lower tower 14 and liquid nitrogen fraction and the liquid nitrogen of main condenser evaporator 13 and reboiler 15 out common
It is subcooled in a main subcooler 11, can also separate and be subcooled in two different main subcoolers.The liquid oxygen of rectifying column exports
It can be connected by pipeline and pass through main subcooler 11, can also be subcooled in ad hoc subcooler with liquid nitrogen, for example, main condenser
In addition the connected pipeline in the liquid nitrogen outlet of evaporator 13 can also separate again is used for liquid oxygen after throttling in subcooler 9 all the way
Supercooling.
The operation process and conventional band high/low temperature that liquid space division device more than above-mentioned upper specification, liquid nitrogen production uses are swollen
The operation process of swollen machine air refrigeration cycle liquid space division device is substantially identical.First according to band high/low temperature expander air system
The requirement starting air cooling cycle system and rectifying column of SAPMAC method liquid space division device are run, until setting up normal rectifying
Operating condition, rectifying column produce the low-pressure nitrogen that qualified liquid oxygen product, liquid nitrogen product and purity reach requirement.Due to liquid nitrogen at this time
Yield also not up to require, therefore circulation air supercharger 2, supercharging air turbo-expander (including high temperature air turbine boosting expansion
Machine 4 and Cryogenic air booster expansion turbine 6) decrement operation.After the purity of the low-pressure nitrogen of main heat exchanger 8 out is up to standard, rise
Dynamic nitrogen compressor 1 and the capacity for being stepped up nitrogen compressor 1 from less to more, make this strand of nitrogen drop to regulation temperature in main heat exchanger 8
The reboiler 15 for entering lower tower 14 after degree, is condensed into liquid nitrogen wherein.At the same time, by circulation air supercharger 2, high temperature air
Gradually increment is run until reaching defined working condition requirement for booster expansion turbine 4 and Cryogenic air booster expansion turbine 6.
The liquid space division device of above scheme can simplify starting process, shorten the starting time, reduce plant investment, reduce
The unit power consumption of liquid product has apparent economic benefit.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (10)
1. a kind of liquid space division device, including rectifying column, it is characterised in that: the liquid space division device further includes that air cooling follows
Loop system and nitrogen cycle system；
The air refrigeration cycle system include the raw material air compressor machine that the rectifying column is then connected to after being sequentially connected by pipeline,
Circulation air supercharger, supercharging air turbo-expander further include the air circulation heat exchanger for realizing air heat exchange；
The nitrogen cycle system includes the nitrogen compressor connected by pipeline, is passed through boiling again for the oxygen-enriched liquid air that the rectifying column generates
Device, at least one branch of the nitrogen outlet institute connecting pipe of the rectifying column is connected to after the nitrogen compressor described boils again
The liquid nitrogen outlet of device, the reboiler is connected to the rectifying column, gas-liquid separator by pipeline, in pure argon column system three
At least one.
2. liquid space division device according to claim 1, it is characterised in that: the liquid space division device further includes several
For realizing the nitrogen cycle heat exchanger of nitrogen heat exchange in the nitrogen cycle system.
3. liquid space division device according to claim 2, it is characterised in that: the air circulation heat exchanger and the nitrogen follow
Ring heat exchanger is integrated into a main heat exchanger.
4. liquid space division device according to claim 1, it is characterised in that: set between the Shang Ta of the rectifying column and lower tower
It is equipped with main condenser evaporator, the liquid nitrogen of the main condenser evaporator, which is exported, is connected to the rectifying column, gas-liquid separation by pipeline
At least one of device, pure argon column system three.
5. liquid space division device according to claim 1, it is characterised in that: the liquid space division device further includes several
The main subcooler being subcooled for realizing liquid nitrogen in the nitrogen cycle system.
6. liquid space division device according to claim 5, it is characterised in that: what the liquid nitrogen outlet of the reboiler was connected
Pipeline be then connected to after the main subcooler rectifying column, gas-liquid separator, in pure argon column system three at least
One.
7. liquid space division device according to claim 1, it is characterised in that: the nitrogen compressor is low pressure nitrogen compressor or middle pressure
Nitrogen compressor.
8. liquid space division device according to claim 1, it is characterised in that: the reboiler is set to the rectifying column
Lower tower bottom is connected by pipeline with the lower tower of the rectifying column.
9. liquid space division device according to claim 1, it is characterised in that: the supercharging air turbo-expander is single swollen
Perhaps the supercharging air turbo-expander is that single expanding machine with pre-cooler or the supercharging air turbine are swollen to swollen machine
Swollen machine is the double expanding machines for including high temperature air booster expansion turbine and Cryogenic air booster expansion turbine.
10. liquid space division device according to claim 1, it is characterised in that: the circulation air supercharger and the sky
Cooler is provided between gas booster expansion turbine, between the supercharging air turbo-expander and the rectifying column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821962187.3U CN209085176U (en) | 2018-11-27 | 2018-11-27 | Liquid space division device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821962187.3U CN209085176U (en) | 2018-11-27 | 2018-11-27 | Liquid space division device |
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| CN209085176U true CN209085176U (en) | 2019-07-09 |
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| CN201821962187.3U Active CN209085176U (en) | 2018-11-27 | 2018-11-27 | Liquid space division device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405414A (en) * | 2018-11-27 | 2019-03-01 | 薛鲁 | Liquid space division device |
| CN113654302A (en) * | 2021-08-12 | 2021-11-16 | 乔治洛德方法研究和开发液化空气有限公司 | Low-temperature air separation device and method |
-
2018
- 2018-11-27 CN CN201821962187.3U patent/CN209085176U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109405414A (en) * | 2018-11-27 | 2019-03-01 | 薛鲁 | Liquid space division device |
| CN113654302A (en) * | 2021-08-12 | 2021-11-16 | 乔治洛德方法研究和开发液化空气有限公司 | Low-temperature air separation device and method |
| CN113654302B (en) * | 2021-08-12 | 2023-02-24 | 乔治洛德方法研究和开发液化空气有限公司 | Low-temperature air separation device and method |
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