CN205079544U - Preparation facilities of oxygen -enriched air product - Google Patents
Preparation facilities of oxygen -enriched air product Download PDFInfo
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- CN205079544U CN205079544U CN201520850519.9U CN201520850519U CN205079544U CN 205079544 U CN205079544 U CN 205079544U CN 201520850519 U CN201520850519 U CN 201520850519U CN 205079544 U CN205079544 U CN 205079544U
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Abstract
The embodiment of the utility model provides a preparation facilities of oxygen -enriched air product relates to air separation technical field. Preparation facilities of oxygen -enriched air product includes air compressor, air precooling, purification system, main heat exchanger, rectifying column and expander, air compressor is used for raw materials air compression to certain pressure: air precooling, purification system are arranged in precooling of raw materials air and deaerate impurity, main heat exchanger is used for retrieving the cold volume in the gas that backflows simultaneously with the raw materials air cooling after purifying, the rectifying column is used for obtaining oxygen boosting dissolved air and nitrogen gas with the raw materials air rectification after the cooling, the expander is used for with another the part raw materials air expansion after the cooling in order to prepare the required cold volume of device. The embodiment of the utility model provides a preparation facilities of oxygen -enriched air product can effectively simplify production process, effectively practices thrift manufacturing cost, and the oxygen -enriched air product that obtains of preparation can directly be used for combustion -supportingly, does not need to increase in addition the more muddy system of disposition during use and all, guarantees safe in utilizationly.
Description
Technical field
The utility model relates to technical field of air separation, in particular to a kind of preparation facilities of oxygen-enriched air product.
Background technology
Combustion process is traditionally mostly be the thermal process of oxidant source based on air, conventional combustion manner combustion air only 21% oxygen participate in combustion process, and the nitrogen of 79% in air does not only help burning, absorb a large amount of combustion reaction liberated heats on the contrary, and discharge as flue gas, cause the very large waste of fuel.
Along with improving constantly of combustion supporting technology, it is found that and adopt oxygen-enriched air (air that the volume fraction of oxygen is greater than the average oxygen purity in air is called oxygen-enriched air) as the more traditional combustion process more energy-conserving and environment-protective of oxidant source: under oxygen-enriched environment, fuel is rapid after-flame within the shortest time, maximum possible, discharge all heats fully, improve the burn-off rate of fuel, reduce the heat loss of fuel, save fuel, meanwhile, oxygen-enriched combusting environmental energy effectively improves the heating rate of fuel system and energy-conservation.
Research finds, flame temperature increases with the increase of the oxygen content of combustion air, and when oxygen content is less than 30%, flame temperature rises very fast; When oxygen content is greater than 30%, flame temperature rises slowly, and general oxygen content controls about 30% as combustion-supporting effect is best.
The preparation method of current industrial oxygen-enriched air is mainly separated air, and most widely used is cryogenic rectification method, secondly also has membrane separation process.
Application number is that the utility model application of 201110096197.X discloses a kind of separation technique for low pressure oxygen-enriched air, its flow process is that double tower positive flowrate expansion produces oxygen enriching process, obtain the oxygen-enriched air product of oxygen purity at 80%-95%, adopt the oxygen-enriched air product obtained in this way, need when applying and could use after air mixing, and need to increase mixing system again during mixing, great inconvenience is brought to use, simultaneously, in mixture process, oxygen-enriched purity is not easy to control, the security incidents such as easy generation body of heater burns, secondly, high cost is caused because product purity is relatively high, increase cost of investment.
Utility model content
In view of this, the object of the utility model embodiment is the preparation facilities providing a kind of oxygen-enriched air product, to improve the problems referred to above.
First aspect, the utility model embodiment provides a kind of preparation facilities of oxygen-enriched air product, and the preparation facilities of oxygen-enriched air product comprises air compressor, Pre-cooling equipment, molecular sieve adsorber, main heat exchanger, rectifying column and decompressor;
Described air compressor, described Pre-cooling equipment are connected successively with described molecular sieve adsorber;
Described air compressor is used for raw air to be compressed to 0.4-0.6MPa, and described raw air comprises the first raw air and the second raw air;
Described Pre-cooling equipment is used for the described raw air after by compression and is chilled to 8-10 DEG C in advance;
Described molecular sieve adsorber is used for the described raw air purifying after precooling, removes the moisture in described raw air, carbon dioxide and acetylene;
Described main heat exchanger is used for the described raw air after purifying to be cooled to saturation temperature;
Described rectifying column is used for that cooled described first raw air is carried out rectifying and obtains oxygen enrichment liquefied air and nitrogen, and the tower top of described rectifying column is provided with condenser/evaporator;
Described decompressor is used for cooled described second raw air to be expanded to atmospheric pressure state;
Described main heat exchanger also obtains oxygen-enriched air product for gas re-heat to the normal temperature that obtains after being mixed with oxygen-enriched air by described second raw air after expanding, and described oxygen-enriched air obtains after described oxygen enrichment liquefied air is vaporized.
In conjunction with first aspect, the utility model embodiment provides the first possible embodiment of first aspect, wherein, the preparation facilities of oxygen-enriched air product also comprises subcooler, described subcooler respectively with at the bottom of the tower of described decompressor, described rectifying column and described condenser/evaporator be connected;
Described subcooler is used for the described oxygen enrichment liquefaction Air flow that will obtain, and reclaims low temperature and to backflow the cold of gas;
In conjunction with the first possible embodiment of first aspect, the utility model embodiment provides the possible embodiment of the second of first aspect, wherein, described air cleaning unit comprises and also comprises choke valve, described choke valve is between described subcooler and described condenser/evaporator, and described choke valve is used for cooled described oxygen enrichment liquefied air to carry out throttling.
The preparation facilities of the oxygen-enriched air product that the utility model embodiment provides, the structure of preparation facilities is simple, when preparing the oxygen-enriched air mixed with raw air, low to the content requirement of oxygen in oxygen-enriched air, the flow process therefore produced is easier, consumes energy lower in producing process, can effectively save production cost, and the oxygen-enriched air product prepared can be directly used in combustion-supporting, do not need during use separately to increase mixing system again, ensure use safety.
For making above-mentioned purpose of the present utility model, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the structural representation of the preparation facilities of the oxygen-enriched air product that the utility model first embodiment provides;
Fig. 2 shows the structural representation of the preparation facilities of the oxygen-enriched air product that the utility model second embodiment provides.
Main element symbol description:
Main heat exchanger 101, rectifying column 102, decompressor 103, subcooler 104, condenser/evaporator 105, air compressor 107, molecular sieve adsorber 108, choke valve 109, Pre-cooling equipment 110.
Detailed description of the invention
Below in conjunction with accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on embodiment of the present utility model, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
To consider in prior art that double tower positive flowrate expansion produces oxygen enriching process and produce the oxygen-enriched air obtained, need in use to increase mixing system, in mixture process, oxygen-enriched purity is not easy to control, the security incidents such as easy generation body of heater burns, and cause high cost because product purity is relatively high, increase cost of investment.Based on this, the utility model embodiment provides a kind of preparation facilities of oxygen-enriched air product, is described below by embodiment.
Embodiment one
Consult Fig. 1 (direction of arrow in figure represents the flow direction of gas or liquid), the utility model embodiment provides a kind of preparation facilities of oxygen-enriched air product, comprise air compressor 107, Pre-cooling equipment 110, molecular sieve adsorber 108, main heat exchanger 101, rectifying column 102 and decompressor 103, air compressor 107, Pre-cooling equipment 110 is connected successively with molecular sieve adsorber 108, air compressor 107 is for being compressed to 0.4-0.6MPa by raw air, Pre-cooling equipment 110 is for being chilled to 8-10 DEG C in advance by the raw air after compression, molecular sieve adsorber 108 is for by the described air purge after precooling, remove the moisture in raw air, the impurity such as carbon dioxide and acetylene, main heat exchanger 101 is for being cooled to saturation temperature by the raw air after purification, rectifying column 102 obtains oxygen enrichment liquefied air and nitrogen for cooled a part of raw air is carried out rectifying, the tower top of rectifying column is provided with condenser/evaporator 105, decompressor 103 is for being expanded to atmospheric pressure state by cooled another part raw air, the oxygen-enriched air of main heat exchanger 101 also for obtaining after the air evaporation that the raw air after expansion and oxygen enrichment liquefied mixes gas re-heat to the normal temperature formed and obtains oxygen-enriched air product.
When producing oxygen-enriched air product, first raw air enters in air compressor 107 and compresses, and makes the air pressure of raw air remain in 0.4-0.6MPa; After raw air compression, introduce Pre-cooling equipment 110 and raw air is chilled to 8-10 DEG C in advance, after raw air precooling, introduce molecular sieve adsorber 108, remove the materials such as moisture, carbon dioxide and the acetylene in raw air, for ensureing that removal effect is better, preferably, in the present embodiment, adopt two molecular sieve adsorbers be used alternatingly 108.After the materials such as the moisture in raw air, carbon dioxide and acetylene, can wherein sub-fraction be extracted out detect as instrumentation air used.
Molecular sieve adsorber 108 connects main heat exchanger 101, raw air is removed after moisture, carbon dioxide and acetylene through molecular sieve adsorber 108, be introduced in main heat exchanger 101, part raw air (the first raw air namely in claim) is cooled to about-177 DEG C through main heat exchanger 101, and send at the bottom of the tower of rectifying column 102 and carry out rectifying, obtain oxygen enrichment liquefied air and nitrogen, another part raw air (the second raw air namely in claim) is cooled to about-155 DEG C through main heat exchanger 101 and extracts out and introduce decompressor 103 and expand.
Send into the raw air of rectifying column 102, rectifying is carried out in the bottom of rectifying column 102, obtain oxygen enrichment liquefied air and nitrogen, the raw air of oxygen enrichment liquefied air after expanding through decompressor 103 is mixed, then carry out through entering main heat exchanger 101 the oxygen-enriched air product that heat exchange obtains normal temperature state.
The preparation facilities of the oxygen-enriched air product that the utility model embodiment provides is suitable for combustion-supporting oxygen-enriched air product by being mixed with the oxygen-enriched air produced directly to obtain by part material air, more traditional oxygen enrichment preparation facilities and technique are compared, because the oxygen-enriched air product of preparation can be directly used in combustion-supporting, therefore do not need separately to increase mixing system more in use, ensure the use safety of oxygen-enriched air product.Meanwhile, the preparation facilities structure of the oxygen-enriched air product that the present embodiment provides is easier, and equipment cost is low.In addition, produce energy consumption lower, and stable, in oxygen-enriched air product, impurity content is less.
Embodiment two
Consult Fig. 2, the preparation facilities of the oxygen-enriched air product that the present embodiment provides is the improvement carried out on the basis of embodiment one, and in the present embodiment, NM content can refer to the content of embodiment one.
The preparation facilities of the oxygen-enriched air product that the present embodiment provides also is provided with subcooler 104, subcooler 104 respectively with at the bottom of the tower of decompressor 103, rectifying column 102 and condenser/evaporator 105 be connected, meanwhile, the choke valve 109 being used for throttling is set between subcooler 104 and condenser/evaporator 105.The oxygen enrichment liquefaction Air flow of subcooler 104 for obtaining, and reclaim low temperature and to backflow the cold of gas, the low temperature gas that backflows is the oxygen-enriched air that backflows and the raw air after expanding.
The oxygen enrichment liquefied air obtained in the bottom rectifying of rectifying column 102 is introduced into subcooler 104, about-183 DEG C are cooled to through subcooler 104, the condenser/evaporator 105 of tower top is introduced into by choke valve 109 throttling, the a part of nitrogen obtained in the bottom rectifying of rectifying column 102 directly imports condenser/evaporator 105, oxygen enrichment liquefied air carries out heat exchange and forms oxygen-enriched air in condenser/evaporator 105, for condenser/evaporator 105 provides low-temperature receiver in the process of heat exchange, and nitrogen is made to be cooled to liquid nitrogen.Meanwhile, after the oxygen-enriched air of formation mixes with the raw air carrying out expanding through decompressor 103, derive after subcooler 104 and main heat exchanger 101 carry out heat exchange and obtain oxygen-enriched air product.Cool the liquid nitrogen extension obtained and be liquid nitrogen product, all the other introduce tower top as phegma, and extension nitrogen is used as regeneration gas after main heat exchanger 101 re-heat.
The preparation facilities of the oxygen-enriched air product that the present embodiment provides, while can producing and being directly used in combustion-supporting oxygen-enriched air product, can also produce the byproducts such as the liquid nitrogen that obtains and have economic worth and nitrogen.
The above; be only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with the protection domain of claim.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In description of the present utility model, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this utility model product orientation of usually putting or position relationship when using, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
Claims (3)
1. a preparation facilities for oxygen-enriched air product, is characterized in that, comprising: air compressor, Pre-cooling equipment, molecular sieve adsorber, main heat exchanger, rectifying column and decompressor;
Described air compressor, described Pre-cooling equipment are connected successively with described molecular sieve adsorber;
Described air compressor is used for raw air to be compressed to 0.4-0.6MPa, and described raw air comprises the first raw air and the second raw air;
Described Pre-cooling equipment is used for the described raw air after by compression and is chilled to 8-10 DEG C in advance;
Described molecular sieve adsorber is used for the described raw air purifying after precooling, removes the moisture in described raw air, carbon dioxide and acetylene;
Described main heat exchanger is used for the described raw air after purifying to be cooled to saturation temperature;
Described rectifying column is used for that cooled described first raw air is carried out rectifying and obtains oxygen enrichment liquefied air and nitrogen, and the tower top of described rectifying column is provided with condenser/evaporator;
Described decompressor is used for cooled described second raw air to be expanded to atmospheric pressure state;
Described main heat exchanger also obtains oxygen-enriched air product for gas re-heat to the normal temperature that obtains after being mixed with oxygen-enriched air by described second raw air after expanding, and described oxygen-enriched air obtains after described oxygen enrichment liquefied air is vaporized.
2. the preparation facilities of oxygen-enriched air product according to claim 1, is characterized in that, also comprise subcooler, described subcooler respectively with at the bottom of the tower of described decompressor, described rectifying column and described condenser/evaporator be connected;
Described subcooler is used for the described oxygen enrichment liquefaction Air flow that will obtain, and reclaims low temperature and to backflow the cold of gas;
3. the preparation facilities of oxygen-enriched air product according to claim 2, it is characterized in that, also comprise choke valve, described choke valve is between described subcooler and described condenser/evaporator, and described choke valve is used for cooled described oxygen enrichment liquefied air to carry out throttling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520850519.9U CN205079544U (en) | 2015-10-29 | 2015-10-29 | Preparation facilities of oxygen -enriched air product |
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| CN201520850519.9U CN205079544U (en) | 2015-10-29 | 2015-10-29 | Preparation facilities of oxygen -enriched air product |
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| CN205079544U true CN205079544U (en) | 2016-03-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222525A (en) * | 2015-10-29 | 2016-01-06 | 西亚特工业气体科技（杭州）有限公司 | The preparation facilities of oxygen-enriched air product and method |
| CN107174832A (en) * | 2017-06-15 | 2017-09-19 | 重庆川茂化工科技有限公司 | Gas purification high-purity distillation technology and equipment |
| CN112654827A (en) * | 2018-10-09 | 2021-04-13 | 林德有限责任公司 | Method and air separation plant for extracting one or more air products |
-
2015
- 2015-10-29 CN CN201520850519.9U patent/CN205079544U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222525A (en) * | 2015-10-29 | 2016-01-06 | 西亚特工业气体科技（杭州）有限公司 | The preparation facilities of oxygen-enriched air product and method |
| CN105222525B (en) * | 2015-10-29 | 2018-03-27 | 杭州特盈能源技术发展有限公司 | The preparation facilities and method of oxygen-enriched air product |
| CN107174832A (en) * | 2017-06-15 | 2017-09-19 | 重庆川茂化工科技有限公司 | Gas purification high-purity distillation technology and equipment |
| CN112654827A (en) * | 2018-10-09 | 2021-04-13 | 林德有限责任公司 | Method and air separation plant for extracting one or more air products |
| CN112654827B (en) * | 2018-10-09 | 2022-12-06 | 林德有限责任公司 | Method and air separation plant for extracting one or more air products |
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Effective date of registration: 20160715 Address after: 310000 room 1, building 913, Wuzhou international business center, Hangzhou, Zhejiang, Xihu District Patentee after: Hangzhou special energy technology development Co., Ltd. Address before: Xihu District Yuhang Tong Road Hangzhou City, Zhejiang province 310000 No. 799 Wuzhou international business center building 1, room 908 Patentee before: Industrial gases Technology (Hangzhou) Co., Ltd. |