CN206771875U - A kind of oxygen-enriched device for making of kiln low pressure - Google Patents
A kind of oxygen-enriched device for making of kiln low pressure Download PDFInfo
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- CN206771875U CN206771875U CN201720641047.5U CN201720641047U CN206771875U CN 206771875 U CN206771875 U CN 206771875U CN 201720641047 U CN201720641047 U CN 201720641047U CN 206771875 U CN206771875 U CN 206771875U
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- tower
- rectifying column
- subcooler
- heat exchanger
- main heat
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Abstract
The utility model discloses a kind of oxygen-enriched device for making of kiln low pressure, including filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater, main heat exchanger, double rectification column, main condenser evaporator, subcooler, turbo-expander, ice chest.The utility model device is using two-tower rectification, nitrogen stream backed expansion reparation technology, and equipment is few, stable, and energy consumption is low, and oxygen enriched product recovery rate is high, directly can be used for kiln system, by-product recovery.
Description
Technical field
It the utility model is related to technical field of air separation, and in particular to a kind of oxygen-enriched device for making of kiln low pressure.
Background technology
With the continuous improvement of combustion supporting technology, it has been found that use the oxygen-enriched combustion process more traditional as oxidant source
More energy efficient environmental protection：Under oxygen-enriched environment, fuel rapid after-flame within the most short time, most possibly, fully discharge all
Heat, improve the burn-off rate of fuel, reduce the heat loss of fuel, saved fuel, meanwhile, oxygen-enriched combusting environment can be effective
Raising fuel system heating rate and save.
At present, the oxygen-enriched purity that air separation unit is produced typically in 80%-95%, needs and ability after air mixing in application
Use, the shortcomings that so bringing：Need to be further added by mixing system first, product purity is higher, during practical application to can be only achieved user
Required oxygen-enriched ratio, increase cost of investment；Second, during mixture, oxygen-enriched purity should not control, and body of heater easily occurs and burns
Etc. security incident.
The UF membrane of use produces the problem of oxygen enrichment technology is present and defect：First, high energy consumption；Second, oxygen-enriched combustion-supporting pressure
It is low；Third, the stability deficiency run steadily in the long term；Fourth, film replacement cost is high.
The content of the invention
The purpose of this utility model is to provide a kind of oxygen-enriched device for making of kiln low pressure and method, to solve prior art
Deficiency.
The utility model uses following technical scheme：
A kind of oxygen-enriched device for making of kiln low pressure, including filter, Turbine Air compressor, air precooling unit, friendship
It is swollen for molecular sieve adsorber, electric heater, main heat exchanger, double rectification column, main condenser evaporator, subcooler, the turbine used
Swollen machine, 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, double rectification column, main condenser evaporator, subcooler, turbo-expander are arranged in ice chest, double
Level rectifying column includes under rectifying column tower on tower and rectifying column, main condenser evaporator be located under rectifying column on tower and rectifying column tower it
Between；
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, main heat exchanger according to
Secondary connection, raw air import of the main heat exchanger again with tower bottom under rectifying column connect；
The nitrogen under pressure outlet of top of tower connects with main condenser evaporator under rectifying column, the liquid nitrogen outlet of main condenser evaporator
Connected respectively with top of tower, subcooler under rectifying column, subcooler is deposited with liquid nitrogen product outside top of tower on rectifying column, ice chest respectively again
Storage tank connects, wherein, the connecting line of top of tower is provided with choke valve two, subcooler and the outer liquid of ice chest on subcooler and rectifying column
The connecting line of nitrogen product storage tank is provided with valve；
The liquid air outlet of tower bottom connects with subcooler under rectifying column, and subcooler connects with tower middle part on rectifying column again, its
In, set choke valve one on the pipeline of connection in the middle part of tower on subcooler and rectifying column；
The oxygen-enriched outlet of the low pressure of tower bottom connects with subcooler on rectifying column, and subcooler connects with main heat exchanger again, and master changes
Hot device connects external pipe to provide low pressure oxygen enriched product；
The low-pressure nitrogen outlet of top of tower connects with subcooler on rectifying column, and subcooler connects with main heat exchanger, main heat exchange
Device connects with turbo-expander, and turbo-expander connects with main heat exchanger again, and main heat exchanger connects with electric heater, electric heater
Connected with the molecular sieve adsorber being used alternatingly, main heat exchanger connects external pipe to provide nitrogen product.
Further, main heat exchanger connects external pipe to provide nitrogen product, and the external pipe can be provided with nitrogen compressor.
The beneficial effects of the utility model：
The utility model device is using two-tower rectification, nitrogen stream backed expansion reparation technology, and equipment is few, stable, energy consumption
Low, oxygen enriched product recovery rate is high, directly can be used for kiln system, by-product recovery.The oxygen enriched product produced is dries, band
Pressure (1.5-3barA) directly can use the oxygen-enriched (40-70%O of low-purity for kiln system2), without with air mixture, will not
The moisture and impurity being introduced into air, product purity and pressure will not be influenceed by ambient environmental conditions and be changed, product purity
And pressure adjustable, it is applied widely, can meet the needs of user is to different purity and different pressures oxygen enriched product to the full extent.
There are a large amount of byproduct nitrogen and liquid nitrogen to reclaim simultaneously, economic value only byproduct can cost recovery in 2 years.
Brief description of the drawings
Fig. 1 is the utility model schematic device.
Embodiment
The utility model is done with reference to embodiment and accompanying drawing and further explained.The following example is merely to illustrate
The utility model, but be not used to limit practical range of the present utility model.
A kind of oxygen-enriched device for making of kiln low pressure, 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, double rectification column 7, main condenser evaporation
Device 13, subcooler 8, turbo-expander 9, 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 arranged at outside ice chest, and main heat exchanger 6, double rectification column 7, main condenser evaporator 13, subcooler 8, turbo-expander 9 are set
In in ice chest, double rectification column 7 includes tower 14 on tower 12 under rectifying column and rectifying column, and main condenser evaporator 13 is located under rectifying column
On tower 12 and rectifying column between tower 14；
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 raw air import of the main heat exchanger 6 again with the bottom of tower under rectifying column 12 connects；
The nitrogen under pressure outlet at the top of tower 14 and main condenser evaporator 13 connect under rectifying column, the liquid of main condenser evaporator 13
Nitrogen outlet connects with the top of tower under rectifying column 14, subcooler 8 respectively, subcooler 8 again respectively with the top of tower on rectifying column 14, ice chest
Outer liquid nitrogen product storage tank connection, wherein, the connecting line at the top of tower 14 is provided with choke valve two on subcooler 8 and rectifying column
11, the connecting line of the outer liquid nitrogen product storage tank of subcooler 8 and ice chest is provided with valve；
The liquid air outlet of the bottom of tower 12 and subcooler 8 connect under rectifying column, and subcooler 8 connects with the middle part of tower on rectifying column 14 again
Connect, wherein, set choke valve 1 on the pipeline of the middle part of tower 14 connection on subcooler 8 and rectifying column；The bottom of tower 14 on rectifying column
The oxygen-enriched outlet of low pressure and subcooler 8 connect, and subcooler 8 connects with main heat exchanger 6 again, and main heat exchanger 6 connects external pipe to carry
For low pressure oxygen enriched product；
The low-pressure nitrogen outlet at the top of tower 14 and subcooler 8 connect on rectifying column, and subcooler 8 and main heat exchanger 6 connect, main
Heat exchanger 6 and turbo-expander 9 connect, and turbo-expander 9 connects with main heat exchanger 6 again, and main heat exchanger 6 and electric heater 5 connect
Connect, electric heater 5 and the molecular sieve adsorber 4 being used alternatingly connect, and main heat exchanger 6 connects external pipe to provide nitrogen production
Product, the external pipe can be provided with nitrogen compressor (not indicated in Fig. 1).
The function of above-mentioned each part is as follows：
Filter 1, for the dust and mechanical admixture in filter stock air；
Turbine Air compressor 2, for the raw air after filtering to be compressed into setting pressure；
Air precooling unit 3, for the raw air precooling after filtering, compressing；
The molecular sieve adsorber 4 being used alternatingly, for that will filter, compress, the raw air purifying after precooling, go to remove water
Divide, CO2、C2H2Deng material；
Electric heater 5, for heated nitrogen with regenerated molecular sieve absorber；
Main heat exchanger 6, for filtering, compression, precooling, raw air after purification to be cooled down；For low pressure is oxygen-enriched multiple
Nitrogen re-heat after heat, the re-heat of low-pressure nitrogen part, expansion；
Double rectification column 7, including tower 14 on tower 12 and rectifying column under rectifying column, under rectifying column tower 12 be used for by it is filtered,
Raw air cryogenic rectification after compression, precooling, purifying, cooling and be separated into liquid air and nitrogen under pressure；Tower 14 is used on rectifying column
In by liquid air, liquid nitrogen rectifying for liquefy oxygen-enriched and low-pressure nitrogen；
Main condenser evaporator 13, for by nitrogen under pressure and liquefy it is oxygen-enriched exchanged heat, nitrogen under pressure liquefaction is liquid nitrogen, liquid
Change that oxygen-enriched to be vaporizated into low pressure oxygen-enriched；
Subcooler 8, for by liquid air, liquid nitrogen supercooling, for by low pressure is oxygen-enriched, low-pressure nitrogen re-heat；
Turbo-expander 9, for low-pressure nitrogen expansion to be produced into the required cold of ice chest.
It is oxygen-enriched that said apparatus produces kiln low pressure, comprises 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 about 0.5-0.8MPaA；After enter the molecule that is used alternatingly after air precooling unit 3 is cooled to 5-8 DEG C in advance
Purified in sieve absorber 4, by moisture, CO2、C2H2Removed Deng material；
Step 2: raw air part after purification is used for into instrument air (not indicated in Fig. 1), remainder enters
Low pressure that main heat exchanger 6 is backflowed is oxygen-enriched, low-pressure nitrogen, the nitrogen after expansion are cooled to saturation and with necessarily containing entering after wet
The bottom rectifying of tower 12 is separated into liquid air and nitrogen under pressure under rectifying column；Nitrogen under pressure introduces main condenser evaporator 13 and liquefied oxygen-enriched
Exchanged heat, while nitrogen under pressure liquefaction is liquid nitrogen, a liquid nitrogen part is incorporated into tower 12 under rectifying column, as tower under rectifying column 12
Phegma, a part introduces tower 14 on rectifying column after subcooler 8 is subcooled and throttles, as the phegma of tower on rectifying column 14,
Remainder cooling box is as liquid nitrogen product；
Step 3: liquid air enters the middle part rectifying of tower 14 on rectifying column after subcooler 8 is subcooled, choke valve 1 throttles, obtain
To the oxygen-enriched and low-pressure nitrogen that liquefies；It is oxygen-enriched that the oxygen-enriched nitrogen under pressure drawn by lower tower that liquefies is vaporizated into low pressure, the oxygen-enriched process of low pressure
Cooling box is as low pressure oxygen enriched product after cooler 8, the re-heat of main heat exchanger 6；Low pressure oxygen enriched product purity is 40%O2- 70%O2, pressure
Power is 1.5-3.0BarA, directly can be used for kiln system；Low-pressure nitrogen draws after subcooler 8, the part re-heat of main heat exchanger 6
Enter the swell refrigeration of turbo-expander 9, the nitrogen introducing re-heat rear portion of main heat exchanger 6 makees molecular sieve adsorber regeneration after expansion
Gas, remainder can be used as nitrogen product after nitrogen compressor compresses.
Claims (2)
1. a kind of oxygen-enriched device for making of kiln low pressure, it is characterised in that pre- including filter, Turbine Air compressor, air
Cold group, the molecular sieve adsorber being used alternatingly, electric heater, main heat exchanger, double rectification column, main condenser evaporator, supercooling
Device, turbo-expander, ice chest,
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, electric heater are arranged at
Outside ice chest, main heat exchanger, double rectification column, main condenser evaporator, subcooler, turbo-expander are arranged in ice chest, twin-stage essence
Evaporating tower includes under rectifying column tower on tower and rectifying column, and main condenser evaporator is located under rectifying column on tower and rectifying column between tower；
Filter, Turbine Air compressor, air precooling unit, the molecular sieve adsorber being used alternatingly, main heat exchanger connect successively
Connect, raw air import of the main heat exchanger again with tower bottom under rectifying column connects；
The nitrogen under pressure outlet of top of tower connects with main condenser evaporator under rectifying column, the liquid nitrogen outlet difference of main condenser evaporator
Connected with top of tower, subcooler under rectifying column, subcooler again respectively with liquid nitrogen product storage tank outside top of tower on rectifying column, ice chest
Connection, wherein, the connecting line of top of tower is provided with choke valve two, subcooler and the outer liquid nitrogen production of ice chest on subcooler and rectifying column
The connecting line of product storage tank is provided with valve；
The liquid air outlet of tower bottom connects with subcooler under rectifying column, and subcooler connects with tower middle part on rectifying column again, wherein, mistake
On cooler and rectifying column choke valve one is set in the middle part of tower on the pipeline of connection；
The oxygen-enriched outlet of the low pressure of tower bottom connects with subcooler on rectifying column, and subcooler connects with main heat exchanger again, main heat exchanger
External pipe is connected to provide low pressure oxygen enriched product；
On rectifying column top of tower low-pressure nitrogen outlet connected with subcooler, subcooler connects with main heat exchanger, main heat exchanger with
Turbo-expander connects, and turbo-expander connects with main heat exchanger again, and main heat exchanger connects with electric heater, electric heater and friendship
For the molecular sieve adsorber connection used, main heat exchanger connects external pipe to provide nitrogen product.
2. the oxygen-enriched device for making of kiln low pressure according to claim 1, it is characterised in that main heat exchanger connects exterior tube
To provide nitrogen product, the external pipe can be provided with nitrogen compressor in road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720641047.5U CN206771875U (en) | 2017-06-05 | 2017-06-05 | A kind of oxygen-enriched device for making of kiln low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720641047.5U CN206771875U (en) | 2017-06-05 | 2017-06-05 | A kind of oxygen-enriched device for making of kiln low pressure |
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| CN206771875U true CN206771875U (en) | 2017-12-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062802A (en) * | 2017-06-05 | 2017-08-18 | 杭州特盈能源技术发展有限公司 | A kind of kiln oxygen-enriched device for making of low pressure and method |
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2017
- 2017-06-05 CN CN201720641047.5U patent/CN206771875U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062802A (en) * | 2017-06-05 | 2017-08-18 | 杭州特盈能源技术发展有限公司 | A kind of kiln oxygen-enriched device for making of low pressure and method |
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