CN105571270B - A kind of device and method of air separation oxygen quick load change - Google Patents
A kind of device and method of air separation oxygen quick load change Download PDFInfo
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Abstract
The invention discloses a kind of device and method of air separation oxygen quick load change.The naked tank of liquid oxygen is positioned in ice chest, liquid oxygen water bath carburetor is placed on the bottom of water-cooling tower, the naked tank top of liquid oxygen is connected with upper tower bottom oxygen channel, sent out so that the oxygen vaporized in the naked tank of liquid oxygen takes out pipeline with oxygen, the outlet at bottom of the naked tank of liquid oxygen draws ice chest and is divided into two-way, the interface for exporting or inputting for liquid oxygen all the way, another way go to the liquid oxygen water bath carburetor for the bottom for being located at water-cooling tower, and liquid oxygen gasifies on the pipeline after the oxygen taking-up valve of full low pressure air separation unit is sent to for gas phase herein.
Description
Technical field
The invention belongs to make steel oxygen supply equipment field, the device of more particularly to a kind of air separation oxygen quick load change and
Method.
Background technology
With the diversified of Chemical Manufacture and become more meticulous, require oxygen supply more changeable strict, oxygen cost is used to reduce.
Particularly in steel-making enterprise, because the contradiction that the interruption of steel-making is continuously supplied oxygen with oxygen and space division is more prominent, how oxygen is reduced
The problem of gas amount of diffusin, keeping the equilibrium of supply and demand, reaching air separation unit economical operation receives much concern.This promotes air separation unit manufactory
Business develops " varying duty type " air separation unit.The mode of varying duty type has two kinds at present, and one kind is that liquid oxygen periodically pours in down a chimney with liquid nitrogen
The Automatic load change of mode, it is referred to as the air separation unit of internal variable oxygen output（VAROX）;Such as：Disclosed patent
" a kind of operating mode variation oxygen production installation "（Application number 03234184.9）, using oxygenerator produce load elasticity, with liquid nitrogen, gas oxygen
Deposit and cold is exchanged in rectifying column, in the case where not increasing energy consumption, realize liquid oxygen and gas oxygen, the exchange between liquid nitrogen and gas nitrogen,
The oxygen output of the oxygenerator regulated quantity on the economical operating point of design can be made to reach 10%-15%.Another kind is that tracking is adjusted, root
According to the pressure of pipe network, increase and decrease oxygen output, use Automatic load change software（ALC）Automatically adjust, this varying duty processes air
Amount will change therewith.The first varying duty air separation unit（VAROX）Although speed is very fast, per minute reachable 5 ~ 6%,
This varying duty needs sufficiently large liquid oxygen and liquid nitrogen storage, it is also necessary to increases a set of refrigeration system to meet the need of varying duty
Will, or the refrigerating capacity of increase expanding machine meets the needs of varying duty, while operate also relatively cumbersome.Second of automatic become is born
Lotus（ALC）The setting value of product yield is changed by operating personnel, perform software ALC, it is related to variable working condition by calculating
One-to-one process control parameter each setting value, one group of setting value is then inputted into DCS system, alternate parameter is original
Set point, this new set point can be the actual value of controlled parameter, gradual scope of the regulation to setting within the defined time
It is interior.By the operation characteristic of air separation unit is determined, the speed of varying duty can not be too fast, although with air separation unit manufacture level
Raising, Changing load-acceleration has been greatly improved, but facts have proved and also there was only 0.2 ~ 0.25%/min.Therefore one is implemented
Secondary varying duty（80~110%）Overall process about need time-consuming 150min or so.This meet production technology meet an urgent need demand have very big difference
Away from.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, flow is simple, easy to operate, and oxygen varying duty speed can
Arbitrarily regulated and controled in time according to external demand situation, very little is influenceed on former air separation unit oxygen operating mode, and equipment investment cost is low.
In order to realize the purpose of quick load change, the invention provides a kind of dress of air separation oxygen quick load change
Put, it includes such as lower component：Filter, compressor, normal temperature water pump, air cooling tower, molecular sieve adsorber, heater, water at low temperature
Pump, water-cooling tower, booster expansion machine, heat exchanger, main heat exchanger, lower tower, main condenser evaporator, subcooler, upper tower, ice chest；The dress
Putting also includes the naked tank of liquid oxygen and liquid oxygen water bath carburetor, and the naked tank of liquid oxygen is positioned in ice chest, and liquid oxygen water bath carburetor is placed on water
The bottom of cold tower, the naked tank top of liquid oxygen are connected with upper tower bottom oxygen channel so that the oxygen vaporized in the naked tank of liquid oxygen is with oxygen
Pipeline is taken out to send out, the outlet at bottom of the naked tank of liquid oxygen draws ice chest and is divided into two-way, the interface for exporting or inputting for liquid oxygen all the way,
Another way goes to the liquid oxygen water bath carburetor for the bottom for being located at water-cooling tower, and liquid oxygen gasifies herein is sent to full low pressure space division for gas phase
On pipeline after the oxygen taking-up valve of device.
Further, after air is filtered, into compressor compresses, it is cooled by air cooling tower compressed air
Water spray cools down, and compressed air enters moisture and dioxy that a molecular sieve adsorber is used to remove air after going out air cooling tower
Change carbon, clean air enters back into the rectifying that lower tower carries out air after main heat exchanger all the way；Another way air enters increasing
Compression swelling machine, it is cooled to normal temperature through heat exchanger and enters back into main heat exchanger heat exchange, extracted out from main heat exchanger middle part and enter supercharging
The rectifying that tower participates in upper tower is entered after expander；
The liquid air of lower tower bottom is taken out from bottom, and liquid air is entered in the middle part of upper tower through choke valve throttling after subcooler is subcooled
The rectifying of tower in participation；The nitrogen of lower top of tower enters main condenser evaporator and is condensed into liquid nitrogen, and liquid nitrogen is used as lower tower all the way
Phegma；Another way is sent into upper phegma of the top of tower as upper tower after subcooler is subcooled through choke valve；
The nitrogen of upper top of tower takes out to exchange heat through subcooler, main heat exchanger；Upper tower top take out dirty nitrogen through subcooler,
Main heat exchanger is divided into two-way after exchanging heat to normal temperature：Heated device all the way, removes regenerated molecular sieve, when molecular sieve is heated to suitable temperature
After degree, the dirty heated device shortcut cold blowing molecule of nitrogen is sieved to normal temperature；Another way dirt nitrogen enters water-cooling tower through valve regulated
Bottom after the water heat exchange of water-cooling tower top spray with being discharged into air；The oxygen of upper tower bottom take out through main heat exchanger exchange heat to
Normal temperature through outside Valve controlling discharger it is compressed to after convenient pressure for users to use；When liquid oxygen liquid in main condenser evaporator
When position is high, V1 valves are opened, in the liquid oxygen deposit naked tank of liquid oxygen.
Further, when excessive due to sending oxygen increment outside so that when water-cooling tower outlet temperature is close to 0 DEG C, to increase
The flow of low temperature water pump, depending on the flow of air cooling tower outlet air temperature adjustment normal temperature water pump.
Present invention also offers a kind of method of air separation oxygen quick load change, it comprises the following steps：Step
(1) after air is filtered, into compressor compresses, cooled down by the cooled Water spray of air cooling tower compressed air, compression
Air enters moisture and carbon dioxide that a molecular sieve adsorber is used to remove air, clean air after going out air cooling tower
The rectifying that lower tower carries out air is entered back into after main heat exchanger all the way；Another way air enters booster expansion machine, through heat exchange
Device is cooled to normal temperature and enters back into main heat exchanger heat exchange, and it is laggard to enter booster expansion machine expansion from the extraction of main heat exchanger middle part
Enter to upper tower to participate in the rectifying of upper tower；
The liquid air of tower bottom takes out from bottom under step (2), and liquid air enters through choke valve throttling after subcooler is subcooled
The rectifying of upper tower is participated in the middle part of upper tower；The nitrogen of lower top of tower enters main condenser evaporator and is condensed into liquid nitrogen, and liquid nitrogen is all the way
Phegma as lower tower；Another way is sent into upper phegma of the top of tower as upper tower after subcooler is subcooled through choke valve；
The nitrogen of top of tower takes out in step (3) exchanges heat through subcooler, main heat exchanger；Take out dirty nitrogen warp in upper tower top
Subcooler, main heat exchanger are divided into two-way after exchanging heat to normal temperature：Heated device arrives molecular sieve adsorber again all the way, when molecular sieve is inhaled
After adnexa heating, the dirty heated device of nitrogen；Another way dirt nitrogen enters bottom and the water cooling tower top of water-cooling tower through valve regulated
It is discharged into after the water heat exchange of portion's spray in air；The oxygen of upper tower bottom takes out and exchanged heat through main heat exchanger to normal temperature through Valve controlling
Outside discharger it is compressed to after convenient pressure for users to use；When liquid oxygen liquid level is high in main condenser evaporator, V1 valves are beaten
Open, in the liquid oxygen deposit naked tank of liquid oxygen；
Step (4) is when the increase of external demand amount of oxygen produces the adjustable range of amount of oxygen beyond normal air separation unit, you can throws
Operated with varying duty oxygenation, i.e., fully open V4 valves, increase the aperture of how many control unlatching V2 valves depending on external demand oxygen.
Further, in the step (1), pre-adjusted depending on outer oxygen situation of change and remove booster expansion machine pressurized end
Air capacity, so that upper tower has enough colds to be enriched in main condenser evaporator, and then liquid oxygen more than needed can be shifted to an earlier date storing liquid
In the naked tank of oxygen.
Further, in the step (4), if during the naked tank liquid level deficiency of liquid oxygen, liquid oxygen can be passed through V3 valves, V2 valve controls
System is counter to be delivered in the naked tank of liquid oxygen.
Further, in the step (4), when excessive due to sending oxygen increment outside so that water-cooling tower outlet temperature connects
At nearly 0 DEG C, the flow of low temperature water pump is increased, depending on the flow of air cooling tower outlet air temperature adjustment normal temperature water pump.
The beneficial effects of the present invention are：Oxygen sends load increment outside when 0-100% changes, and air separation unit is produced
Operating mode has little to no effect, and greatly reduces operation difficulty.The naked tank of liquid oxygen is positioned in ice chest, the naked tank top of liquid oxygen with it is upper
Tower bottom oxygen channel is connected so that the oxygen vaporized in the naked tank of liquid oxygen takes out pipeline with oxygen and sent out, and is both produced in the absence of oxygen
Product lose, also in the absence of loss of refrigeration capacity；Liquid oxygen water bath carburetor is positioned over cold water tower bottom, the naked tank of liquid oxygen and liquid oxygen water-bath vapour
Change device and form an organic whole with air separation unit so that oxygen quickly increases load and is possibly realized；The naked tank of liquid oxygen is positioned over ice chest
Interior to greatly reduce equipment investment compared with being positioned over the liquid oxygen vacuum tank outside ice chest, flow is simple, reduces floor space；
The naked tank of liquid oxygen is positioned over the loss of refrigeration capacity of whole air separation unit (if flow arrangement is proper) in ice chest relative to being positioned over outside device
The cold damage of the liquid oxygen vacuum tank in portion air separation unit in addition will not increase, and the loss of refrigeration capacity for being conducted to pearlife of the naked tank of liquid oxygen, support
Disappeared the loss of refrigeration capacity of tower, pipeline.
The invention discloses a kind of device and method of air separation oxygen quick load change.It is empty in the full low pressure of external compression
In split flow, in the consideration to production technology and equipments safety, device has certain cold more than needed, more with loxygen discharge
It is used for into cryogenic vacuum liquid tank in sale or air (when content of organics exceeds set quota in liquid oxygen)；The present invention
It is to place the liquid oxygen of an appropriate volume naked tank in ice chest, main cold liquid oxygen more than needed is discharged into the naked tank of liquid oxygen, the naked tank of liquid oxygen
Top exit takes out pipeline with upper tower bottom oxygen and is connected；The outlet at bottom of the naked tank of liquid oxygen draws ice chest and is divided into two-way, all the way for
Liquid oxygen exports or the interface of input, another way go to the liquid oxygen water bath carburetor for the bottom for being located at water-cooling tower, and liquid oxygen gasifies herein
It is sent to for gas phase on the pipeline after the oxygen taking-up valve of full low pressure air separation unit.The present invention can be realized outside oxygen within a few minutes
Growth by more than 10% is sent, and original device production status is influenceed less, varying duty operation to be sent outside compared to traditional oxygen, this
The potentiality of existing equipment flow have fully been excavated in invention, and equipment investment is small, simple to operate, and varying duty is quick, and operating cost is low etc.
Advantage.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Marked in Fig. 1：1-filter, 2-compressor, 3-normal temperature water pump, 4-air cooling tower, 5-molecular sieve adsorber,
6-heater, 7-low temperature water pump, 8-water-cooling tower, 9-booster expansion machine, 10-heat exchanger, 11-main heat exchanger, 12-under
The naked tank of tower, 13-liquid oxygen, 14-main condenser evaporator (master cold), 15-subcooler, 16-upper tower, 17-ice chest.
Related logistics number in Fig. 1：K1- goes out air cooling tower air, and air removes main heat exchanger after K2- molecular sieve purifications,
K3- molecular sieve purification air removes booster expansion machine, and K4- expanded airs remove tower, and K5- goes out main heat exchanger air and enters Xia Ta,
Tower liquid air goes that liquefier is subcooled under K6-, and K7- goes out to be subcooled liquefier liquid air and removes tower, and top of tower nitrogen under D1-, D2- goes out master
Condenser/evaporator liquid nitrogen returns lower tower, and liquid nitrogen removes tower after D3- goes out subcooler, and D4- goes out upper top of tower nitrogen, and D5- goes out main heat exchange
Device nitrogen, L1- go out upper tower top dirt nitrogen, and L2- goes out main heat exchanger dirt nitrogen cold blowing molecular sieve, and L3- goes out main heat exchanger dirt nitrogen
Gas removes molecular sieve heater, and L4- goes out main heat exchanger dirt nitrogen and removes water-cooling tower, and L5- heatings or cold blowing dirt nitrogen go out molecular sieve and put
Air, the cold liquid oxygen of Y1- master remove the naked tank of liquid oxygen, and the naked tank evaporation oxygen of Y2 liquid oxygen goes tower oxygen to take out pipeline, the upper tower bottoms of Y3-
Oxygen takes out, and Y4- oxygen goes out main heat exchanger, the naked pot bottom liquid oxygen discharge of Y5- liquid oxygen, and Y6- goes out water-bath evaporator oxygen.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in figure 1, a kind of device and method of air separation oxygen quick load change, comprises the following steps, in device
The connection of each part also represents clear as shown in flow：
1st, air is compressed into 0.5MPa or so into the air of compressor 2, passes through air cooling tower 4 after the filtering of filter 1
The cooled Water spray of compressed air is cooled to 15 DEG C or so, goes out the compressed air K1 of air cooling tower 4, two are entered through sequencing valve
One (another regenerating molecular sieve) of molecular sieve 5 removes the moisture and carbon dioxide of air, and clean air is further divided into two
Road；Oxygen of the air K2 through main heat exchanger 11 and reflux, nitrogen, dirty nitrogen exchange heat all the way, and air K5 is cooled to -170 DEG C of left sides
The rectifying of the lower progress of tower 12 air is being entered behind the right side；The pressurized end that another way air K3 enters expanding machine is further pressed
0.7MPa or so is reduced to, is exchanged heat through heat exchanger 10 and recirculated water and is cooled to the oxygen that normal temperature enters back into main heat exchanger 11 and reflux
Gas, nitrogen, the heat exchange of dirty nitrogen arrive -140 DEG C or so, extract the expanding end system for entering booster expansion machine 9 out from main heat exchanger middle part
Air K4 after cold expansion enters the rectifying that tower 16 participates in upper tower.
2nd, the air for participating in lower tower rectifying is finally divided into the liquid air K6 of lower tower bottom and the nitrogen D1 of lower top of tower.Lower tower
The liquid air K6 of bottom is taken out from bottom, and the liquid air K7 after subcooler is subcooled is entered in the middle part of upper tower through choke valve throttling and participated in
The rectifying of upper tower；The nitrogen D1 of lower top of tower enters main condenser evaporator and is condensed into liquid nitrogen, and liquid nitrogen is divided into two-way：All the way
Phegmas of the liquid nitrogen D2 as lower tower；Liquid nitrogen D3 of the another way after subcooler is subcooled is sent into upper top of tower conduct through choke valve
The phegma of upper tower.
3rd, in participation the air of tower rectifying be finally divided into the nitrogen D4 of top of tower, upper tower top dirty nitrogen L1, on
Liquid oxygen Y1 in the oxygen Y3 and main condenser evaporator of tower bottom.The nitrogen D4 of upper top of tower takes out and changed through subcooler, main heat exchanger
Heat is to nitrogen at room D5 through being compressed to convenient pressure for users to use through compressor outside Valve controlling discharger；Upper tower top
Take out dirty nitrogen L1 and be divided into two-way after subcooler, main heat exchanger exchange heat to normal temperature：All the way dirty nitrogen L3 through electric heater (or
Steam heater) be heated to 170 DEG C after, remove regenerated molecular sieve, final dirty nitrogen L5 is drained into air.When molecular sieve is heated to
After suitable temperature, dirty nitrogen L2 is sieved to normal temperature through electric heater shortcut cold blowing molecule；Another way dirt nitrogen L4 enters through valve regulated
It is discharged into after entering to the heat exchange of the water of the bottom of water-cooling tower 8 and water-cooling tower top spray in air；The oxygen Y3 of upper tower bottom takes out warp
Main heat exchanger exchange heat to normal temperature oxygen Y4 through outside Valve controlling discharger it is compressed to after convenient pressure for users to use；When
When liquid oxygen liquid level is increased to certain index in main condenser evaporator, V1 valves are opened, in the liquid oxygen Y1 deposit naked tanks 13 of liquid oxygen, when
Main condenser liquid level in evaporator drops to certain position and turns off V1 valves.
4th, when the increase of external demand oxygen produces amount of oxygen adjustable range beyond normal air separation unit, you can the varying duty that comes into operation increases
Oxygen operates.First check for confirming that V1 valves are closed, then fully open V4 valves, opened depending on the how many controls of outer oxygen supply increase
The aperture of V2 valves, water-bath is entered under the pressure effect of pressure and liquid oxygen liquid level of the liquid oxygen Y5 in oxygen channel in the naked tank of liquid oxygen
In gasifier, the oxygen Y6 after gasification is incorporated into the pipeline after air separation unit oxygen takes out valve.
5th, in the step 4, increase when due to external demand oxygen increment so that, when water-cooling tower outlet temperature is close to 0 DEG C
The flow of water pump 7 is increased, depending on the flow of air cooling tower outlet air temperature adjustment water pump 3.
6th, it is not difficult to find out, when implementation steps 4 operate, going to the water at low temperature of air cooling tower will effectively reduce, and naturally also reduce
Air enters the temperature of device, and this undoubtedly adds the air capacity into device, and device production amount of oxygen also increased therewith.
7th, under particular case, when increase booster expansion machine refrigerating capacity can not still use the naked tank liquid of liquid oxygen in the oxygen low ebb cycle
Face is raised sufficiently high when spending, and can purchase liquid oxygen with exterior market and be inputted by V3 valves, V2 valves into the naked tank 13 of liquid oxygen, be step 4
Implementation carry out and more fully prepare, extend the time of a varying duty oxygenation.
8th, when implementation steps 4 finish, first V2 valves is once closed, after a period of time, treat that liquid oxygen fills in liquid oxygen carburetor
Divide vaporization, then gradually close V4 valves, complete once complete varying duty operation.
9th, oxygen channel is discharged into from the naked tank top of liquid oxygen because pearlife heat conduction produces a small amount of liquid oxygen vaporisation in the naked tank of liquid oxygen, both
Oxygen has been reclaimed, has also reclaimed cold.
It is described above, only it is exemplary embodiments of the present invention, is not intended to limit the scope of the present invention, it is all
It is to still fall within this to implementing any subtle modifications, equivalent variations and modifications done above according to technical spirit of the invention
In the range of the technical scheme of invention.
Claims (4)
1. a kind of device of air separation oxygen quick load change, it includes such as lower component：
Filter (1), compressor (2), normal temperature water pump (3), air cooling tower (4), molecular sieve adsorber (5), heater (6), low temperature
Water pump (7), water-cooling tower (8), booster expansion machine (9), heat exchanger (10), main heat exchanger (11), lower tower (12), main condenser evaporator
(14), subcooler (15), upper tower (16), ice chest (17)；
It is characterized in that：The device also includes the naked tank of liquid oxygen (13) and liquid oxygen water bath carburetor, and the naked tank of liquid oxygen is positioned over ice chest
(17) in, liquid oxygen water bath carburetor is placed on the bottom of water-cooling tower, and the naked tank top of liquid oxygen is connected with upper tower bottom oxygen channel, made
Obtaining the oxygen vaporized in the naked tank of liquid oxygen and take out pipeline submitting with oxygen, the outlet at bottom of the naked tank of liquid oxygen draws ice chest and is divided into two-way,
The interface for exporting or inputting for liquid oxygen all the way, another way go to the liquid oxygen water bath carburetor for the bottom for being located at water-cooling tower, and liquid oxygen exists
This gasification is on the pipeline after gas phase is sent to the oxygen taking-up valve of full low pressure air separation unit；
Air compresses after filter (1) filtering into compressor (2), passes through the cooled Water spray of air cooling tower (4) compressed air
Cooling, compressed air enter moisture and titanium dioxide that a molecular sieve adsorber (5) is used to remove air after going out air cooling tower (4)
Carbon, clean air enter back into the rectifying that lower tower (12) carries out air after main heat exchanger (11) all the way；Another way air enters
Enter to booster expansion machine (9), being cooled to normal temperature through heat exchanger (10) enters back into main heat exchanger (11) heat exchange, from main heat exchanger
(11) rectifying for entering after booster expansion machine (9) expands and entering tower in Shang Ta (16) participation is extracted at middle part out；Lower tower (12) bottom
The liquid air in portion is taken out from bottom, and liquid air is entered in the middle part of Shang Ta (16) through choke valve throttling and participated in after subcooler (15) supercooling
The rectifying of tower；Nitrogen at the top of lower tower (12) enters main condenser evaporator (14) and is condensed into liquid nitrogen, and liquid nitrogen is used as down all the way
The phegma of tower (12)；Another way is sent into the backflow at the top of upper tower (16) as upper tower after subcooler (15) supercooling through choke valve
Liquid；
Nitrogen at the top of upper tower (16) takes out to exchange heat through subcooler (15), main heat exchanger (11)；Take out dirty nitrogen warp in upper tower top
It is divided into two-way after subcooler (15), main heat exchanger (11) heat exchange to normal temperature：Heated device (6) all the way, removes regenerated molecular sieve, when point
After son sieve is heated to suitable temperature, the dirty heated device shortcut cold blowing molecule of nitrogen is sieved to normal temperature；Another way dirt nitrogen is adjusted through valve
Section is discharged into air after entering the bottom of water-cooling tower (8) and the water heat exchange of water-cooling tower top spray；The oxygen of upper tower bottom takes
Go out through main heat exchanger exchange heat to normal temperature through outside Valve controlling discharger it is compressed to after convenient pressure for users to use；When master is cold
When liquid oxygen liquid level is high in solidifying evaporator, V1 valves are opened, in the liquid oxygen deposit naked tank of liquid oxygen (13).
2. device according to claim 1, it is characterised in that：
When excessive due to sending oxygen increment outside so that when water-cooling tower outlet temperature is close to 0 DEG C, to increase low temperature water pump (7)
Flow, depending on the flow of air cooling tower (4) outlet air temperature adjustment normal temperature water pump (3).
3. a kind of method of air separation oxygen quick load change, it comprises the following steps：
Step (1) air compresses after filter (1) filtering into compressor (2), cold by air cooling tower (4) compressed air
But Water spray cools down, and compressed air enters the moisture that a molecular sieve adsorber (5) is used to remove air after going out air cooling tower (4)
And carbon dioxide, clean air enter back into the rectifying that lower tower (12) carries out air after main heat exchanger (11) all the way；It is another
Road air enters booster expansion machine (9), and being cooled to normal temperature through heat exchanger (10) enters back into main heat exchanger (11) heat exchange, from master
Extract the rectifying for entering after booster expansion machine (9) expands and entering tower in Shang Ta (16) participation in the middle part of heat exchanger (11) out；
Under step (2) liquid air of tower (12) bottom from bottom take out, through subcooler (15) supercooling after liquid air through choke valve throttle into
Enter the rectifying to the upper tower of participation in the middle part of upper tower (16)；Nitrogen at the top of lower tower (12) enters main condenser evaporator (14) and is condensed
For liquid nitrogen, the liquid nitrogen phegma as lower tower (12) all the way；Another way is sent into upper tower after subcooler (15) supercooling through choke valve
(16) phegma of the top as upper tower；
Nitrogen in step (3) at the top of tower (16) takes out to exchange heat through subcooler (15), main heat exchanger (11)；Take out dirty in upper tower top
Nitrogen is divided into two-way after subcooler (15), main heat exchanger (11) heat exchange to normal temperature：Heated device (6) all the way, removes rejuvenated molecular
Sieve, after molecular sieve is heated to suitable temperature, the dirty heated device shortcut cold blowing molecule of nitrogen is sieved to normal temperature；Another way dirt nitrogen passes through
Valve regulated is discharged into air after entering the bottom of water-cooling tower (8) and the water heat exchange of water-cooling tower top spray；Upper tower bottom
Oxygen take out through main heat exchanger exchange heat to normal temperature through outside Valve controlling discharger it is compressed to after convenient pressure for users to use；
When liquid oxygen liquid level is high in main condenser evaporator, V1 valves are opened, in the liquid oxygen deposit naked tank of liquid oxygen (13)；
Step (4) is when the increase of external demand amount of oxygen produces the adjustable range of amount of oxygen beyond normal air separation unit, you can come into operation change
Load oxygenation operates, i.e., fully open V4 valves, increases the aperture of how many control unlatching V2 valves depending on external demand oxygen；The naked tank of liquid oxygen (13)
In pressure and liquid oxygen liquid level of the liquid oxygen in oxygen channel pressure effect under enter in liquid oxygen water bath carburetor, after gasification
Oxygen be incorporated into air separation unit oxygen take out valve after pipeline in；
In the step (1), the air capacity for removing booster expansion machine (9) pressurized end is pre-adjusted depending on outer oxygen situation of change, with
Just upper tower has enough colds to be enriched in main condenser evaporator, and then liquid oxygen more than needed can be stored to the naked tank of liquid oxygen (13) in advance
In；
In the step (4), if during the naked tank of liquid oxygen (13) liquid level deficiency, liquid oxygen can be controlled by V3 valves, V2 valves and counter deliver to liquid
In the naked tank of oxygen.
4. method as claimed in claim 3, it is characterised in that：In the step (4), when excessive due to sending oxygen increment outside,
During so that water-cooling tower outlet temperature is close to 0 DEG C, the flow of low temperature water pump (7) is increased, is adjusted depending on air cooling tower outlet air temperature
The flow of whole normal temperature water pump (3).
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| CN106996680A (en) * | 2017-02-24 | 2017-08-01 | 杭州颐氧健康科技有限公司 | The anti-formula of noting of health care gas liquid oxygen is produced and feeder and its preparation method |
| CN113154796B (en) * | 2021-03-23 | 2022-12-09 | 金川集团股份有限公司 | Variable multi-cycle oxygen-nitrogen cold energy utilization device and method for recycling oxygen-nitrogen resources |
| CN113432035B (en) * | 2021-06-16 | 2022-12-20 | 中盐安徽红四方股份有限公司 | Low-temperature liquid heating and discharging device and using method thereof |
| CN113899162A (en) * | 2021-10-15 | 2022-01-07 | 华能（天津）煤气化发电有限公司 | Rapid load-variable air separation device for IGCC power station and control method thereof |
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| CN103575064A (en) * | 2012-07-23 | 2014-02-12 | 中国石油化工股份有限公司 | Device and method for oxygen and nitrogen separation through air and rapid increase of pressure nitrogen loads |
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| JPS6044584B2 (en) * | 1977-12-19 | 1985-10-04 | 株式会社日立製作所 | Air separation method to collect liquid nitrogen or liquid oxygen |
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| CN103575064A (en) * | 2012-07-23 | 2014-02-12 | 中国石油化工股份有限公司 | Device and method for oxygen and nitrogen separation through air and rapid increase of pressure nitrogen loads |
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