CN208124718U - Booster expansion machine air supply system and air separation plant - Google Patents
Booster expansion machine air supply system and air separation plant Download PDFInfo
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- CN208124718U CN208124718U CN201820320449.XU CN201820320449U CN208124718U CN 208124718 U CN208124718 U CN 208124718U CN 201820320449 U CN201820320449 U CN 201820320449U CN 208124718 U CN208124718 U CN 208124718U
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- 238000000926 separation method Methods 0.000 title claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical group [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 210000004712 air sac Anatomy 0.000 claims description 2
- 238000005194 fractionation Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 41
- 239000003921 oil Substances 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 13
- 238000005057 refrigeration Methods 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 238000001035 drying Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000004887 air purification Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides a kind of booster expansion machine air supply system and air separation plant, belong to technical field of air separation, for being supplied to fractionating column, including air cleaning unit, first pipeline and the second pipeline, by being successively arranged the first cooler tower on the entrance to fractionating column of the first pipeline on first pipeline, the first supercharger that expanding machine drives, second cooler and expanding machine, the main heat exchanger for exchanging heat for expanded air is additionally provided on first pipeline, enter expanding machine after main heat exchanger by the expanded air of the first supercharger, the second supercharger for compressing the gas for entering the first pipeline is additionally provided on first pipeline between air cleaning unit and the first cooler.Air separation plant uses the booster expansion machine air supply system.Booster expansion machine air supply system and air separation plant provided by the utility model, at low cost and more energy saving, gas extraction rate can greatly improve.
Description
Technical field
The utility model belongs to technical field of air separation, is to be related to a kind of booster expansion machine gas supply system more specifically
System and the air separation plant for using the booster expansion machine air supply system.
Background technique
Air separation plant be exactly using air as raw material, by compression depth of round freezing method air is become liquid, then
The equipment for producing the inert gases such as oxygen, nitrogen and argon gas is gradually separated from liquid air by rectifying.Air separation plant
Gas supply is by swell refrigeration, and the refrigeration of entire air separation plant follows strictly classical refrigeration cycle.The space division being commonly referred
Refrigeration equipment is primarily referred to as expanding machine.Domestic expanding machine is limited by material at this stage, and swell increment and revolving speed condition each other,
Swell increment is bigger, and impeller diameter is bigger, and edge linear velocity has limiting value, determines that revolving speed cannot be too high, is unable to reach high-speed and high-efficiency,
It is compared with U.S.'s expanding machine, refrigerating capacity low 10% or more.U.S.'s expanding machine is expensive, is equivalent to eight to the ten of domestic expanding machine
Times.Since domestic efficiency of expander is low, it is necessary to which bigger expansion tolerance, expansion is large-minded, and the gas of upper tower is fractionated due to entering
Amount cannot be excessive, otherwise can interfere tower rectifying, so can bleed off a part for expanding gas, not enter tower, to cause
The recovery rate of fractionating column is greatly reduced.
Utility model content
The purpose of this utility model is to provide a kind of booster expansion machine air supply system and air separation plants, it is intended to solve existing
Air separation plant gas supply, will cause the problem of recovery rate of fractionating column is greatly reduced.
To achieve the above object, the technical solution adopted in the utility model is：A kind of booster expansion machine air supply system is provided,
For being supplied to fractionating column, including for filtering air air cleaning unit, for be connected to the air cleaning unit and point
Evaporate the first pipeline of tower on tower and the second pipeline for being connected to tower under the air cleaning unit and fractionating column, described first
The first pressurization on pipeline by being successively arranged the first cooler tower on the entrance to fractionating column of the first pipeline, expanding machine drives
Machine, the second cooler and expanding machine are additionally provided with the main heat exchanger for exchanging heat for expanded air on first pipeline, by
The expanded air of one supercharger enters expanding machine after the main heat exchanger, is located at the air cleaning on first pipeline
The second supercharger for compressing the gas for entering the first pipeline is additionally provided between device and first cooler.
Further, bypass flow path is additionally provided on first pipeline, the arrival end of the bypass flow path is located at the increasing
The front side of press arrival end, the outlet end of the bypass flow path are located at the rear side of the supercharger outlet end；The bypass flow path
It is equipped with control valve.
Further, the control valve is pneumatic diaphragm control valve.
Further, first supercharger includes the compression impeller for compressing air inlet, and the expanding machine includes being used for
With the expanding machine impeller for driving the compression impeller.
Further, the expanding machine impeller is coaxially fixed or the expanding machine impeller and compression impeller with compression impeller
It is connected by drive mechanism.
Further, enter institute behind the middle and lower part of the main heat exchanger by the expanded air of first supercharger
State expanding machine.
Further, the air cleaning unit is molecular sieve or seperation film.
Further, the gas in second pipeline enters tower under fractionating column after the main heat exchanger.
Further, the supercharger is air compressor.
The beneficial effect of booster expansion machine air supply system provided by the utility model is：Compared with prior art, this reality
With new type pressurized expanding machine air supply system, by the way that the second supercharger is arranged on the first pipeline, the gas that will be filtered from air filter equipment
Body compression enters the first supercharger of expanding machine drive subsequently into expanding machine, after the pressurization of the second supercharger after cooling
Increase machine using first, pressure rise before expanding machine machine, refrigerating capacity can greatly increase, while swell increment can reduce, swell increment
After reduction, expansion machine rotor diameter can reduce accordingly, so as to improve revolving speed.The refrigeration effect of expanding machine will be convex in this way
It is aobvious.Corresponding cost also will be greatly reduced after expansion machine rotor reduction, and more energy saving.After swell increment reduces, gas enters
It is smaller to rectifying interference after tower on fractionating column, therefore extra gas will not be generated, it does not need to put the tolerance that expanding machine comes out
Fall, since the tolerance of the first pipeline will not increase, then the surplus air of air cleaning unit filtering can enter by the second gas circuit
The processing tolerance of lower tower, lower tower is bigger, and gas extraction rate can greatly improve.
The utility model also provides a kind of air separation plant, including fractionating column, further includes the above-mentioned pressuring expansion of any one
Machine air supply system.
The beneficial effect of air separation plant provided by the utility model is：The utility model air separation plant, should due to using
Booster expansion machine air supply system, by the way that the second supercharger is arranged on the first pipeline, the gas compression that will be filtered from air filter equipment,
Enter the first supercharger that expanding machine drives after cooling subsequently into expanding machine, using the after the pressurization of the second supercharger
One increases machine, and pressure rise before expanding machine machine, refrigerating capacity can greatly increase, while swell increment can reduce, swollen after swell increment reduces
Swollen machine rotor diameter can reduce accordingly, so as to improve revolving speed.The refrigeration effect of expanding machine will highlight in this way.Expanding machine
Corresponding cost also will be greatly reduced after rotor reduction, and more energy saving.After swell increment reduces, gas enters tower on fractionating column
It is smaller to rectifying interference afterwards, therefore extra gas will not be generated, it does not need to bleed off the tolerance that expanding machine comes out, due to first
The tolerance of pipeline will not increase, then the surplus air of air cleaning unit filtering can enter lower tower by the second gas circuit, lower tower
Processing tolerance is bigger, and gas extraction rate can greatly improve.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of booster expansion machine air supply system provided by the embodiment of the utility model.
In figure：1, fractionating column；11, tower on fractionating column；12, tower under fractionating column；13, main condenser；2, molecular sieve；3, first
Pipeline；31, bypass flow path；32, the second supercharger；33, the first cooler；34, the first supercharger；35, the second cooler；36,
Expanding machine；4, the second pipeline；5, main heat exchanger.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
Also referring to Fig. 1, now booster expansion machine air supply system provided by the utility model is illustrated.The pressurization
Expanding machine air supply system, for fractionating column 1 supply, including for filtering air air cleaning unit, for being connected to air
Purification device with the first pipeline 3 of tower 11 on fractionating column and for being connected to tower 12 under air cleaning unit and fractionating column second
Pipeline 4, by being successively arranged the first cooler 33, expansion tower 11 on the entrance to fractionating column of the first pipeline 3 on the first pipeline 3
The first supercharger 34, the second cooler 35 and the expanding machine 36 that machine 36 drives are additionally provided on the first pipeline 3 for for expanded air
The main heat exchanger 5 of heat exchange enters expanding machine 36, the first pipe by the expanded air of the first supercharger 34 after main heat exchanger 5
The for compressing the gas for entering the first pipeline 3 is additionally provided on road 3 between air cleaning unit and the first cooler 33
Two superchargers 32.
Booster expansion machine air supply system provided by the utility model, compared with prior art, by being set on the first pipeline 3
The second supercharger 32 is set, the gas compression that will be filtered from air filter equipment enters the first supercharger that expanding machine 36 drives after cooling
34 subsequently into expanding machine 36, increases machine 34 using first after the pressurization of the second supercharger 32, presses before 36 machine of expanding machine
Power increases, and refrigerating capacity can greatly increase, while swell increment can reduce, and after swell increment reduces, 36 root diameter of expanding machine can be corresponding
Reduction, so as to improve revolving speed.The refrigeration effect of expanding machine 36 will highlight in this way.36 rotor of expanding machine is corresponding after reducing
Cost also will be greatly reduced, and it is more energy saving.After swell increment reduces, gas, which enters on fractionating column, interferes rectifying after tower 11
It is smaller, therefore extra gas will not be generated, it does not need to bleed off the tolerance that expanding machine 36 comes out, due to the gas of the first pipeline 3
Amount will not increase, then the surplus air of air cleaning unit filtering can enter lower tower, the processing tolerance of lower tower by the second gas circuit
Bigger, gas extraction rate can greatly improve.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, bypass flow path 31 is additionally provided on the first pipeline 3, the arrival end of bypass flow path 31 is located at 32 arrival end of the second supercharger
Front side, the outlet end of bypass flow path 31 are located at the rear side of 32 outlet end of the second supercharger；Bypass flow path 31 is equipped with control valve.
31 second supercharger 32 of bypass flow path is arranged in parallel on the first pipeline 3, and adjustable second supercharger of bypass flow path 31 is arranged
The pressure difference value of 32 front end pipelines and back end line, setting control valve are convenient for the uninterrupted of control bypass flow path 31, and
Facilitate the unlatching between expanding machine 36 and the second supercharger 32 not influence each other, when starting, first opens expanding machine 36, regulating valve
Door opens maximum, is then turned on the second supercharger 32, then turns down or closes control valve, prevents the second supercharger 32 from first opening
It is dynamic that damage is generated to expanding machine 36.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, control valve is pneumatic diaphragm control valve 311.Easy to use, degree of regulation is high.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, the first supercharger 34 includes the compression impeller for compressing air inlet, and expanding machine 36 includes being used for and driving compression impeller
Expanding machine impeller.By then cooling down in compression impeller (or compressor drum) compressed air, the expansion of expanding machine impeller is empty
Gas, to realize reducing temperature twice, temperature is lower.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, expanding machine impeller is coaxially fixed with compression impeller or expanding machine impeller is connect with compression impeller by drive mechanism.It passes
Dynamic structure can be gear drive or belt wheel transmission etc..
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, enters expanding machine 36 behind the middle and lower part of main heat exchanger 5 by the expanded air of the first supercharger 34.It is changed by master
Compressed air after 5 pairs of hot device coolings carries out heat exchange again, can use reflux recycling cooling capacity.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, air cleaning unit is molecular sieve 2 or seperation film.It (i.e. will be miscellaneous using seperation film using molecular sieve 2 or membrane separation technique
Matter filtering) contaminant filter in air, remaining elementary gas can be facilitated and be separated.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, the gas in the second pipeline 4 enters tower under fractionating column after main heat exchanger 5.Gas in optional second pipeline 4
It is come out behind 5 bottom of main heat exchanger and enters tower under fractionating column, reflux can use by main heat exchanger 5 and carry out heat exchange.The
One pipeline 3 and the second pipeline 4 pass through main heat exchanger 5, and main heat exchanger 5 herein can be same heat exchange equipment and exchange heat,
It is also possible to different heat exchange equipments to exchange heat with other equipment.
Further, referring to Fig. 1, a kind of specific reality as booster expansion machine air supply system provided by the utility model
Mode is applied, the second supercharger 32 is air compressor.Air compressor is by motor driven or oil machine driving or indirectly by biography
Dynamic device drives.
The utility model also provides a kind of air separation plant.Referring to Fig. 1, the air separation plant includes fractionating column 1 and any
One above-mentioned booster expansion machine air supply system.Fractionating column 1 includes that tower 12 and setting are being fractionated under tower 11, fractionating column on fractionating column
Main condenser 13 on tower under tower 11 and fractionating column between tower 12.Fractionating column 1 can be conventional air separation column.
Air separation plant provided by the utility model uses the booster expansion machine air supply system, by the first pipeline 3
Second supercharger 32 is set, and the gas compression that will be filtered from air filter equipment enters the first pressurization that expanding machine 36 drives after cooling
Machine 34 increases machine 34 using first after the pressurization of the second supercharger 32, before 36 machine of expanding machine subsequently into expanding machine 36
Pressure rise, refrigerating capacity can greatly increase, while swell increment can reduce, and after swell increment reduces, 36 root diameter of expanding machine can phase
The reduction answered, so as to improve revolving speed.The refrigeration effect of expanding machine 36 will highlight in this way.Phase after 36 rotor of expanding machine reduces
The cost answered also will be greatly reduced, and more energy saving.After swell increment reduces, gas enters dry to rectifying after tower 11 on fractionating column
Gas that is smaller, therefore will not generating extra is disturbed, does not need to bleed off the tolerance that expanding machine 36 comes out, due to the first pipeline 3
Tolerance will not increase, then the surplus air of air cleaning unit filtering can enter lower tower, the processing gas of lower tower by the second gas circuit
Amount is bigger, and gas extraction rate can greatly improve.
As a specific embodiment of the utility model, (the first main heat exchanger 5 expands sky by taking 15000 oxygen processed as an example
Gas channel design pressure is 0.9MPa)：Referring to Fig. 1, be two-way air inlet on the first pipeline 3 of 32 import of the second supercharger, one
The second supercharger of Lu Weiwu oil drying 32, (boost pressure 0.2MPa, tolerance 13000Nm3/h, inlet pressure 0.4MPa
~0.49MPa, outlet pressure are 0.6MPa~0.69MPa), another way is bypass flow path 31, installs pneumatic diaphragm control valve.
Design is without 32 aftercooler of the second supercharger of oil drying.Second supercharger, 32 lubricating oil system, blanket gas system and oil pressure, axis
Temperature, revolving speed interlock system are configured by technique requirement.
Before starting expanding machine 36, after the pneumatic diaphragm control valve of standard-sized sheet bypass flow path 31, expanding machine 36 to start, control exists
16000 revs/min, restart no the second supercharger of oil drying 32,32 stabilization of speed of the second supercharger to after 6000 revs/min,
The pneumatic diaphragm control valve of bypass flow path 31 is gradually turned down, pressure rises to 0.68MPa by 0.48MPa before the second supercharger 32,
Pressure rises to 0.88MPa by 0.68MPa after second supercharger 32, oil-free with the pneumatic diaphragm control valve adjustment of bypass flow path 31
The pressure difference of dry second supercharger, 32 front-end and back-end, revolving speed.Due to pressure rise 0.2MPa before 36 machine of expanding machine, refrigeration
Amount increases 15% or more, and swell increment can also reduce by 15%.After swell increment reduces, expanding machine 36 rotor (i.e. expanding machine impeller
342) diameter reduces 5%, and maximum speed can increase by 10%.The refrigeration effect for being pressurized high-speed and high-efficiency expanding machine 36 in this way will be convex
It is aobvious.Meanwhile swell increment can also reduce by 15%, smaller to 11 rectifying of tower interference on oxygen fractionating column processed, lower tower processing tolerance is bigger,
Oxygen extraction rate can be higher, and increase oxygen output is 300Nm3/h, and the Argon fraction of upper tower also can be more stable out, Argon recovery rate meeting
Increase by 10%.
As a specific embodiment of the utility model, (the first main heat exchanger 5 expands sky by taking 35000 oxygen processed as an example
Gas channel design pressure is 1.8MPa)：Referring to Fig. 1, transformation 32 import of the second supercharger the first pipeline 3 on for two-way into
Gas is all the way no the second supercharger of oil drying 32, and (boost pressure 0.6MPa, tolerance 30000Nm3/h, inlet pressure are
0.4MPa~0.49MPa, outlet pressure are 1.0MPa~1.09MPa), another way is bypass flow path 31, installs air bladder tune
Save valve.Design 32 aftercooler of the second supercharger.Second supercharger, 32 lubricating oil system, blanket gas system and oil pressure, turn axis temperature
Fast interlock system is configured by technique requirement.
Before starting expanding machine 36, after the pneumatic diaphragm control valve of standard-sized sheet bypass flow path 31, expanding machine 36 to start, control exists
20000 revs/min, restart no the second supercharger of oil drying 32,32 stabilization of speed of the second supercharger to after 6000 revs/min,
The pneumatic diaphragm control valve of bypass flow path 31 is gradually turned down, pressure rises to 1.0MPa by 0.4MPa before the second supercharger 32, the
Pressure rises to 1.2MPa by 0.6MPa after two superchargers 32, with the adjustment of 31 pneumatic diaphragm control valve of bypass flow path without oil drying the
Two superchargers, 32 revolving speed.Due to pressure rise 0.6MPa before 36 machine of expanding machine, refrigerating capacity increases 45% or more, and swell increment can also
To reduce by 45%.After swell increment reduces, 36 root diameter of expanding machine reduces 25%, and maximum speed can increase by 50%.Increase in this way
The refrigeration effect of pressure high-speed and high-efficiency expanding machine 36 will highlight.Meanwhile swell increment can also reduce by 45%, on oxygen fractionating column processed
11 rectifying of tower interference is smaller, and lower tower processing tolerance is bigger, and oxygen extraction rate can be higher, and increase oxygen output is 3000Nm3/h, out
The Argon fraction of upper tower also can be more stable, and Argon recovery rate will increase 30%.
Installation method：
The first pipeline 3 is set two-way air inlet by the first step；
Second step is all the way no the second supercharger of oil drying 32；
Third step, another way are bypass flow path 31, install pneumatic diaphragm control valve；
4th step, first cooler 33 of the installation without station after the second supercharger of oil drying 32；Two-way air inlet merges pipeline
Enter the first cooler 33 afterwards；
5th step is interlocked without 32 lubricating oil system of the second supercharger of oil drying, blanket gas system and oil pressure, axis temperature, revolving speed
System is configured by technique requirement；
Before 6th step, starting expanding machine 36, after 31 pneumatic diaphragm control valve of standard-sized sheet bypass flow path, expanding machine 36 to start
(can choose control at 20000 revs/min), restarts no the second supercharger of oil drying 32,32 stabilization of speed of the second supercharger
After (to 20000 revs/min), gradually turn down the pneumatic diaphragm control valve of bypass flow path 31, before the second supercharger 32 pressure by
0.48MPa rises to 0.68MPa, and pressure rises to 0.88MPa by 0.68MPa after the second supercharger 32, with bypass flow path 31
Pneumatic diaphragm control valve and 32 revolving speed of the second supercharger adjust the pressure of 32 back end line of the second supercharger.Second supercharger 32
It can be also possible to motor connection speed reducer by motor driven, speed reducer drives the shaft of the second supercharger 32.
Beneficial effect：After 15000 oxygen swell incremenies processed reduce, 36 root diameter of expanding machine reduces 5%, and maximum speed can increase
Add 10%.The refrigeration effect for being pressurized high-speed and high-efficiency expanding machine 36 in this way will highlight.It is (swollen after 35000 oxygen swell incremenies processed reduce
Swollen 36 root diameter of machine reduces 25%, and maximum speed can increase by 50%.) it is pressurized the refrigeration of high-speed and high-efficiency expanding machine 36 in this way
Effect will highlight.Meanwhile swell increment can also reduce by 15%~45%, it is smaller to 11 rectifying of tower interference on oxygen fractionating column processed,
Lower tower processing tolerance is bigger, and oxygen extraction rate can be higher.The Argon fraction of upper tower also can be more stable.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. booster expansion machine air supply system, for being supplied to fractionating column, including for filtering air air cleaning unit, be used for
The air cleaning unit is connected to the first pipeline of tower on fractionating column and for being connected to the air cleaning unit and fractionation
Second pipeline of tower under tower, it is cold by being successively arranged first tower on the entrance to fractionating column of the first pipeline on first pipeline
But the first supercharger, the second cooler and expanding machine that device, expanding machine drive are additionally provided on first pipeline for for expansion
The main heat exchanger of air heat-exchange enters expanding machine by the expanded air of the first supercharger after the main heat exchanger, special
Sign is：Be additionally provided between the air cleaning unit and first cooler on first pipeline for compress into
Enter the second supercharger of the gas of the first pipeline.
2. booster expansion machine air supply system as described in claim 1, it is characterised in that：Bypass is additionally provided on first pipeline
Flow path, the arrival end of the bypass flow path are located at the front side of the second supercharger arrival end, the outlet end of the bypass flow path
Rear side positioned at second supercharger outlet end；The bypass flow path is equipped with control valve.
3. booster expansion machine air supply system as claimed in claim 2, it is characterised in that：The control valve is air bladder tune
Save valve.
4. booster expansion machine air supply system as described in claim 1, it is characterised in that：First supercharger includes for pressing
It is retracted the compression impeller of gas, the expanding machine includes for the expanding machine impeller with the driving compression impeller.
5. booster expansion machine air supply system as claimed in claim 4, it is characterised in that：The expanding machine impeller and compression impeller
The coaxial fixed or described expanding machine impeller is connect with compression impeller by drive mechanism.
6. booster expansion machine air supply system as claimed in claim 5, it is characterised in that：By the expansion of first supercharger
Air enters the expanding machine behind the middle and lower part of the main heat exchanger.
7. booster expansion machine air supply system as described in claim 1, it is characterised in that：The air cleaning unit is molecular sieve
Or seperation film.
8. booster expansion machine air supply system as claimed in claim 7, it is characterised in that：Gas in second pipeline passes through
Enter tower under fractionating column after the main heat exchanger.
9. booster expansion machine air supply system as described in claim 1, it is characterised in that：The supercharger is air compressor.
10. air separation plant, including fractionating column, it is characterised in that：It further include the gas supply of booster expansion machine described in 1-9 any one system
System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820320449.XU CN208124718U (en) | 2018-03-08 | 2018-03-08 | Booster expansion machine air supply system and air separation plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820320449.XU CN208124718U (en) | 2018-03-08 | 2018-03-08 | Booster expansion machine air supply system and air separation plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240734A (en) * | 2018-03-08 | 2018-07-03 | 李佳晨 | Booster expansion machine air supply system and air separation plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240734A (en) * | 2018-03-08 | 2018-07-03 | 李佳晨 | Booster expansion machine air supply system and air separation plant |
| CN108240734B (en) * | 2018-03-08 | 2024-03-26 | 李佳晨 | Air supply system of booster expander and air separation equipment |
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Granted publication date: 20181120 Termination date: 20210308 |