CN207716721U - A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower - Google Patents
A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower Download PDFInfo
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- CN207716721U CN207716721U CN201820051587.2U CN201820051587U CN207716721U CN 207716721 U CN207716721 U CN 207716721U CN 201820051587 U CN201820051587 U CN 201820051587U CN 207716721 U CN207716721 U CN 207716721U
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Abstract
The utility model discloses a kind of double condensation oxygen-enriched device for making of low-purity of kiln double tower, including filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater, main heat exchanger, turbo-expander, rectifying column I, rectifying column II, condenser/evaporator I, condenser/evaporator II, subcooler, ice chest.The utility model is using air as raw material, and the molecular sieve adsorber purified air that is used alternatingly produces low-purity oxygen enriched product, liquid nitrogen byproduct and nitrogen byproduct using low-pressure nitrogen stream backed expansion, the double condensations of double tower, and low-purity oxygen enriched product purity is 40%O270%O2, pressure is 1.5 3.0BarA, can directly be used for kiln.
Description
Technical field
The utility model is related to technical field of air separation, and in particular to a kind of kiln is oxygen-enriched with the double condensation low-purity of double tower
Device for making.
Background technology
It is more energy efficient using the oxygen-enriched combustion process more traditional as oxidant with the continuous improvement and application of combustion supporting technology
It is more environmentally friendly.It facts have proved：Under oxygen-enriched environment, fuel rapid after-flame within the shortest time most possibly, fully discharges
Go out all heats, improve the burn-off rate of fuel, reduce the heat loss of fuel, saves fuel, meanwhile, oxygen-enriched combusting environment
The heating rate of fuel system can be effectively improved and energy saving, when oxygen-enriched purity is higher, the temperature of fuel combustion is higher, simultaneously
Nitrogen molecular content reduces, to reduce the discharge of oxynitrides.
The oxygen-enriched primarily discrete air of preparation method of industry at present, most widely used is cryogenic rectification method, is secondly also had
Membrane separation process.
Conventional cryogenic rectification method is using 90% or so high-purity oxygen of air separation unit extraction, first, product purity is opposite
Higher, of high cost, when practical application, which needs to be further added by mixing system, can be only achieved oxygen-enriched ratio, increase cost of investment；Second is that
During mixture, oxygen-enriched purity should not control, and be easy to happen furnace body and the safety accidents such as burn.And oxygen-enriched energy is produced using UF membrane
It is high to consume the stability deficiency that index is high, oxygen-enriched combustion-supporting pressure is low, runs steadily in the long term, film replacement cost.Therefore, how energy is produced
Directly become key for the oxygen-enriched of the suitable purity of kiln system burning.
Invention content
The purpose of this utility model is to provide a kind of double condensation oxygen-enriched device for making of low-purity of kiln double tower, existing to solve
There is the deficiency of technology.
The utility model uses following technical scheme：
A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower, including filter, Turbine Air compressor, air
Precooling unit, the molecular sieve adsorber being used alternatingly, electric heater, main heat exchanger, turbo-expander, rectifying column I, rectifying column
II, condenser/evaporator I, condenser/evaporator II, subcooler, ice chest,
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater are set
It is placed in outside ice chest, main heat exchanger, turbo-expander, rectifying column I, rectifying column II, condenser/evaporator I, condenser/evaporator II, supercooling
Device is set in ice chest, and rectifying column II is set on rectifying column I, and condenser/evaporator I is set between rectifying column I and rectifying column II,
Condenser/evaporator II is set on rectifying column II；
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, main heat exchanger according to
Secondary connection, main heat exchanger are connected with the raw air import of the bottoms rectifying column I again；
Pressure nitrogen gas outlet at the top of rectifying column I is connected with condenser/evaporator I, the liquid nitrogen outlet difference of condenser/evaporator I
It connects, is connected at the top of subcooler and rectifying column II, wherein condensation with liquid nitrogen storage tank outside the tops rectifying column I, subcooler, ice chest
Connecting line at the top of the liquid nitrogen outlet of evaporator I and rectifying column I is equipped with angie type low temperature valve, at the top of subcooler and rectifying column II
Connecting line is equipped with throttle valve；
The liquid air outlet of the bottoms rectifying column I is connected with subcooler, and subcooler is connected with the middle parts rectifying column II again, wherein mistake
Throttle valve is set on the pipeline that cooler and the middle parts rectifying column II connect；
The oxygen-enriched liquid air outlet of the bottoms rectifying column II is connected with condenser/evaporator II, and connecting line is equipped with throttle valve,
Low-pressure nitrogen outlet at the top of rectifying column II is connected with condenser/evaporator II, main heat exchanger respectively；
It is connected at the top of the low pressure liquid nitrogen outlet of condenser/evaporator II and rectifying column II, the oxygen-enriched air of condenser/evaporator II goes out
Mouth is connected with subcooler, and subcooler is connected with main heat exchanger, and main heat exchanger connects external pipe to provide low-purity oxygen enriched product；
The low-pressure nitrogen part re-heat outlet of main heat exchanger is connected with turbo-expander, and turbo-expander and main heat exchanger connect
It connects, main heat exchanger is connected with electric heater, external byproduct nitrogen pipeline respectively, and electric heater and the molecular sieve being used alternatingly are inhaled
Adnexa connects, and external byproduct nitrogen pipeline is connected with nitrogen compressor, to provide byproduct nitrogen.
The beneficial effects of the utility model：
1, the utility model is using air as raw material, the molecular sieve adsorber purified air that is used alternatingly, using low-pressure nitrogen
Low-purity oxygen enriched product, liquid nitrogen byproduct and nitrogen byproduct are produced in the double condensations of stream backed expansion, double tower, and low-purity oxygen enriched product is pure
Degree is 40%O2- 70%O2, pressure 1.5-3.0BarA can be directly for kiln use.
2, the utility model uses the low-pressure nitrogen stream backed expansion device for making institute chilling requirement of rectifying column II, can when startup
Accelerate device and start speed, shorten and start the time, reduces user's power consumption；Can be produced when normal operation a large amount of liquid nitrogen byproduct and
Nitrogen byproduct.
3, the utility model using low-pressure distillation tower II by the liquid air rectifying again of the rectifying column I low-purity isolated, from
And oxygen content and yield in oxygen enriched product can be improved, device recovery rate is improved, energy consumption is reduced.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
Specific implementation mode
The utility model is done with reference to embodiment and attached drawing and is further explained.The following example is merely to illustrate
The utility model, but be not used to limit the scope of the utility model.
A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower, as shown in Figure 1, including filter 1, Turbine Air
Compressor 2, air precooling unit 3, the molecular sieve adsorber 4 being used alternatingly, electric heater 5, main heat exchanger 6, turbo-expander
7, rectifying column I8, rectifying column II10, condenser/evaporator I9, condenser/evaporator II11, subcooler 12, ice chest,
Filter 1, Turbine Air compressor 2, air precooling unit 3, the molecular sieve adsorber 4 being used alternatingly, electrical heating
Device 5 is set to outside ice chest, and main heat exchanger 6, turbo-expander 7, rectifying column I8, rectifying column II10, condenser/evaporator I9, condensation are steamed
Hair device II11, subcooler 12 are set in ice chest, and rectifying column II10 is set on rectifying column I8, and condenser/evaporator I9 is set to rectifying
Between tower I8 and rectifying column II10, condenser/evaporator II11 is set on rectifying column II10；
Filter 1, Turbine Air compressor 2, air precooling unit 3, molecular sieve adsorber 4, the main heat exchange being used alternatingly
Device 6 is sequentially connected, and main heat exchanger 6 is connected with the raw air import of the bottoms rectifying column I8 again；
Pressure nitrogen gas outlet at the top of rectifying column I8 is connected with condenser/evaporator I9, the liquid nitrogen outlet point of condenser/evaporator I9
It does not connect with the tops rectifying column I8, the outer liquid nitrogen storage tank of subcooler 12, ice chest, is connected at the top of subcooler 12 and rectifying column II10,
Wherein, the liquid nitrogen outlet of condenser/evaporator I9 and the connecting line at the top of rectifying column I8 are equipped with angie type low temperature valve, 12 He of subcooler
Connecting line at the top of rectifying column II10 is equipped with throttle valve；
The liquid air outlet of the bottoms rectifying column I8 and subcooler 12 connect, and subcooler 12 is connected with the middle parts rectifying column II10 again,
Wherein, throttle valve is set on the pipeline that subcooler 12 and the middle parts rectifying column II10 connect；
The oxygen-enriched liquid air outlet of the bottoms rectifying column II10 is connected with condenser/evaporator II11, and connecting line is equipped with throttling
Valve, the low-pressure nitrogen outlet at the top of rectifying column II10 are connected with condenser/evaporator II11, main heat exchanger 6 respectively；
It is connected at the top of the low pressure liquid nitrogen outlet of condenser/evaporator II11 and rectifying column II10, condenser/evaporator II11's is oxygen-enriched
Air outlet slit and subcooler 12 connect, and subcooler 12 and main heat exchanger 6 connect, and it is low to provide that main heat exchanger 6 connects external pipe
Purity oxygen enriched product；
The low-pressure nitrogen part re-heat outlet of main heat exchanger 6 and turbo-expander 7 connect, turbo-expander 7 and main heat exchange
Device 6 connects, main heat exchanger 6 connect with electric heater 5, external byproduct nitrogen pipeline respectively, electric heater 5 be used alternatingly
Molecular sieve adsorber 4 connects, and external byproduct nitrogen pipeline is connected with nitrogen compressor and (do not indicated in figure), to provide byproduct nitrogen
Gas.
The function of above-mentioned each component is as follows：
Filter 1, for the dust and mechanical admixture in filter stock air；
Turbine Air compressor 2, for filtered raw air to be compressed to setting pressure；
Air precooling unit 3 is used to filter, the precooling of compressed raw air；
The molecular sieve adsorber 4 being used alternatingly goes to remove water for the raw air purifying after filtering, and compress, being pre-chilled
Point, the substances such as CO2, C2H2；
Electric heater 5, for heated nitrogen with regenerated molecular sieve absorber 4；
Main heat exchanger 6, raw air cooling for will filter, and compress, be pre-chilled, after purification；For oxygen-enriched air to be answered
Nitrogen re-heat after heat, the re-heat of low-pressure nitrogen part, expansion；
Turbo-expander 7, for the required cold of ice chest to be produced in the low-pressure nitrogen expansion after the re-heat of part；
Rectifying column I8, for will through filtering, compression, precooling, purifying, raw air cryogenic rectification after cooling and be separated into
Liquid air and pressure nitrogen gas；
Rectifying column II10, for being oxygen-enriched liquid air and low-pressure nitrogen by liquid air, liquid nitrogen rectifying；
Condenser/evaporator I9, for pressure nitrogen gas and oxygen-enriched liquid air to exchange heat, pressure nitrogen gas liquefaction is liquid nitrogen, oxygen-enriched
Liquid air vaporizes the rising gas as rectifying column II10；
Condenser/evaporator II11, for oxygen-enriched liquid air and low-pressure nitrogen to exchange heat, low-pressure nitrogen is condensed into low pressure
Liquid nitrogen, oxygen-enriched liquid air are vaporizated into oxygen-enriched air；
Subcooler 12 is used for for liquid air, liquid nitrogen to be subcooled by oxygen-enriched air re-heat.
It is oxygen-enriched that above-mentioned kiln with the double condensation oxygen-enriched device for making of low-purity of double tower produces low-purity, includes the following steps：
Step 1: by raw air after filter 1 filters out dust and mechanical admixture, into Turbine Air compressor 2
Air is compressed to setting pressure 0.5-1.0MPaA；After after air precooling unit 3 is cooled to 5-8 DEG C in advance enter be used alternatingly
Molecular sieve adsorber 4 in purify, by moisture, CO2、C2H2Equal substances removal；
Step 2: raw air part after purification is used for instrument air (not indicated in figure), rest part enters
Main heat exchanger 6 is cooled to be saturated and carry centainly is separated into pressure nitrogen gas and liquid air into rectifying column I8 bottom rectifying afterwards containing wet；
Pressure nitrogen gas introduces condenser/evaporator I9 and oxygen-enriched liquid air and exchanges heat, and pressure nitrogen gas liquefaction is liquid nitrogen, extension liquid nitrogen into
Enter rectifying column I8 as phegma, extension liquid nitrogen is subcooled deutomerite stream through subcooler 12 and enters rectifying column II10 as reflux
Liquid, another rest part liquid nitrogen of drawing is as byproduct；
Step 3: liquid air is subcooled through subcooler 12, enters rectifying in the middle part of rectifying column II10 after throttle valve throttling, obtain oxygen-enriched
Liquid air and low-pressure nitrogen；A low-pressure nitrogen part introduces condenser/evaporator II11, and rest part introduces main heat exchanger 6；Part is rich
The oxygen liquid air pressure nitrogen gas that tower I8 is drawn that is distillated vaporizes rising gas as rectifying column II10, remaining oxygen-enriched liquid air is after throttling
Condenser/evaporator II11 is introduced, is exchanged heat with the low-pressure nitrogen of introducing in condenser/evaporator II11, low-pressure nitrogen is condensed
Rectifying column II10 is introduced as phegma for low pressure liquid nitrogen, and oxygen-enriched liquid air is vaporizated into oxygen-enriched air, oxygen-enriched air by low-pressure nitrogen
As low-purity oxygen enriched product directly for kiln system after 6 re-heat of subcooler 12 and main heat exchanger, low-purity oxygen enriched product is pure
Degree is 40%O2- 70%O2, pressure 1.5-3.0BarA；
Step 4: from the part low-pressure nitrogen of rectifying column II10 Base top contacts extracted out after 6 part re-heat of main heat exchanger into
Enter the expansion of turbo-expander 7, the cooling box after 6 re-heat of main heat exchanger, a part of nitrogen are added nitrogen by electric heater 5 again after expansion
The molecular sieve adsorber 4 being used alternatingly is introduced after heat is used as regeneration gas, rest part nitrogen to be used as by-product after nitrogen compressor compresses
Product nitrogen.
Claims (1)
1. a kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower, which is characterized in that including filter, Turbine Air pressure
Contracting machine, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater, main heat exchanger, turbo-expander, rectifying column
I, rectifying column II, condenser/evaporator I, condenser/evaporator II, subcooler, ice chest,
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater are set to
Outside ice chest, main heat exchanger, turbo-expander, rectifying column I, rectifying column II, condenser/evaporator I, condenser/evaporator II, subcooler are set
It is placed in ice chest, rectifying column II is set on rectifying column I, and condenser/evaporator I is set between rectifying column I and rectifying column II, condensation
Evaporator II is set on rectifying column II；
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, main heat exchanger connect successively
It connects, main heat exchanger is connected with the raw air import of the bottoms rectifying column I again；
Pressure nitrogen gas outlet at the top of rectifying column I is connected with condenser/evaporator I, and the liquid nitrogen outlet of condenser/evaporator I is respectively and smart
The tops tower I, subcooler, the outer liquid nitrogen storage tank connection of ice chest are evaporated, is connected at the top of subcooler and rectifying column II, wherein condensation evaporation
Connecting line at the top of the liquid nitrogen outlet of device I and rectifying column I is equipped with angie type low temperature valve, the connection at the top of subcooler and rectifying column II
Pipeline is equipped with throttle valve；
The liquid air outlet of the bottoms rectifying column I is connected with subcooler, and subcooler is connected with the middle parts rectifying column II again, wherein subcooler
Throttle valve is set on the pipeline connected with the middle parts rectifying column II；
The oxygen-enriched liquid air outlet of the bottoms rectifying column II is connected with condenser/evaporator II, and connecting line is equipped with throttle valve, rectifying
Low-pressure nitrogen outlet at the top of tower II is connected with condenser/evaporator II, main heat exchanger respectively；
Connection at the top of the low pressure liquid nitrogen outlet of condenser/evaporator II and rectifying column II, the oxygen-enriched air outlet of condenser/evaporator II and
Subcooler connects, and subcooler is connected with main heat exchanger, and main heat exchanger connects external pipe to provide low-purity oxygen enriched product；
The low-pressure nitrogen part re-heat outlet of main heat exchanger is connected with turbo-expander, and turbo-expander is connected with main heat exchanger,
Main heat exchanger is connected with electric heater, external byproduct nitrogen pipeline respectively, electric heater and the molecular sieve absorption being used alternatingly
Device connects, and external byproduct nitrogen pipeline is connected with nitrogen compressor, to provide byproduct nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820051587.2U CN207716721U (en) | 2018-01-12 | 2018-01-12 | A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower |
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| CN201820051587.2U CN207716721U (en) | 2018-01-12 | 2018-01-12 | A kind of kiln double condensation oxygen-enriched device for making of low-purity of double tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106327A (en) * | 2018-01-12 | 2018-06-01 | 杭州特盈能源技术发展有限公司 | A kind of oxygen-enriched device for making of low-purity and method |
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2018
- 2018-01-12 CN CN201820051587.2U patent/CN207716721U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106327A (en) * | 2018-01-12 | 2018-06-01 | 杭州特盈能源技术发展有限公司 | A kind of oxygen-enriched device for making of low-purity and method |
| CN108106327B (en) * | 2018-01-12 | 2023-10-17 | 杭州特盈能源技术发展有限公司 | Low-purity oxygen-enriched preparation device and method |
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