CN201376900Y - High-purity nitrogen equipment - Google Patents
High-purity nitrogen equipment Download PDFInfo
- Publication number
- CN201376900Y CN201376900Y CN200820187136U CN200820187136U CN201376900Y CN 201376900 Y CN201376900 Y CN 201376900Y CN 200820187136 U CN200820187136 U CN 200820187136U CN 200820187136 U CN200820187136 U CN 200820187136U CN 201376900 Y CN201376900 Y CN 201376900Y
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- tower
- nitrogen
- pipeline
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- air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model provides high-purity nitrogen equipment, comprising a preprocessing system, a rectifying system and a plurality of storers, which are connected by pipes. The rectifying system comprises an expander, a main heat exchanger for exchanging heat, a supercooler and a rectifying tower, wherein the rectifying tower comprises a lower tower, an upper tower and a condensing evaporator. The utility model has the advantages that the expander is used for supplying circulatory refrigeration capacity, thereby saving energy and protecting the environment; and the rectifying tower can be used for producing liquid nitrogen and nitrogen with two different pressures, thereby totally meeting the market demand. In addition, the utility model can operate under different operating conditions according to the amount of air.
Description
Technical field
The utility model relates to a kind of high-purity nitrogen plant, relates more specifically to adopt the method for low temperature fractionation to produce the device of high-purity nitrogen.
Background technology
Rectifying is as the existing history that goes up a century of a kind of traditional separation purification means, and it is widely used in industry-by-industry fields such as metallurgy, chemical industry, glass, electronics.The raw material of high-purity nitrogen plant is an air, and production method mainly is a low temperature fractionation, and main consumption is electric energy in the production process.Along with the day of the energy is more nervous, the rising steadily of energy prices, energy-saving and cost-reducing is one of major issue of paying close attention to the most of all trades and professions.
The production of many industries has periodically, dull and rush season is arranged, so the demand of nitrogen is also had bigger variation.General high-purity nitrogen plant can't satisfy this requirement, can only cause the waste of the energy at a part of nitrogen of gas consumption emptying after a little while.
Some industries need the nitrogen of two kinds of different pressures in addition, to satisfy the needs of different production technique.General high-purity nitrogen plant can only be produced a kind of nitrogen of pressure, must increase the nitrogen that finishing apparatus could be produced another kind of pressure, has so not only increased the investment of equipment and construction, also may cause loss and the secondary pollution of finishing apparatus to nitrogen.Can produce two kinds of different pressures nitrogen and high-purity nitrogen plant that can variable parameter operation simultaneously so market in urgent need is a kind of.
The utility model content
The purpose of this utility model is to solve above-mentioned technical problem, a kind of energy-conserving and environment-protective is provided and can produces the high-purity nitrogen plant of two kinds of different pressures nitrogen simultaneously.
The purpose of this utility model is achieved through the following technical solutions:
A kind of high-purity nitrogen plant comprises that described distillation system comprises decompressor by the interconnective pretreatment system of pipeline, distillation system and some holders, is used for the main heat exchanger and the supercooler of heat exchange, and a rectifying tower; Described rectifying tower comprises the Xia Ta that is interconnected, last tower and condenser/evaporator;
Described tower down is provided with the compressed-air actuated inlet behind the pretreatment system purifying, the described bottom of tower down is the outlet of oxygen-enriched liquid air, the described middle part of tower down is the outlet of middle pressure nitrogen, be connected with middle pressure nitrogen storer by pipeline, the described top of tower down is the outlet of liquid nitrogen, is connected with the liquid nitrogen storer by pipeline;
Described bottom of going up tower is the outlet of oxygen rich air, link to each other with decompressor by pipeline, described middle part of going up tower is the inlet of oxygen-enriched liquid air, be connected with the outlet of the oxygen-enriched liquid air of following tower bottom, described top of going up tower is the outlet of the inlet and the high purity nitrogen of liquid nitrogen, is connected with the low-pressure nitrogen storer by pipeline;
Described condenser/evaporator is connected with the top of following tower, is used for the part liquefaction of nitrogen with following tower, and the opposite side of described condenser/evaporator is connected with the liquid nitrogen storer by pipeline.
Described pretreatment system comprises by the interconnective air filter of pipeline, air compressor, precooling unit, molecular sieve adsorber and electric heater.
Further, the described liquid nitrogen inlet of going up the top of tower is two.Described distillation system includes two decompressors that are arranged in parallel, and all is connected with the oxygen rich air outlet of last tower bottom.
Again further, the high purity nitrogen outlet of described upward top of tower and the pipeline between the low-pressure nitrogen storer pass described supercooler and main heat exchanger.The liquid nitrogen outlet of described top of tower down and the pipeline between the liquid nitrogen storer pass described supercooler.
The beneficial effects of the utility model are mainly reflected in: provide round-robin cold, energy-conserving and environment-protective by decompressor; Rectifying tower can be produced the nitrogen of liquid nitrogen and two kinds of pressure simultaneously, can satisfy the needs in market fully; And the utility model can according to air capacity what and under the various working condition, move.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: the synoptic diagram of the utility model high-purity nitrogen plant.
Wherein:
1 pretreatment system, 2 distillation systems, 3 sound dampers
Press nitrogen storer 5 low-pressure nitrogen storeies 6 liquid nitrogen storeies in 4
11 air filters, 12 air compressor, 13 precooling units
14 molecular sieve adsorbers, 15 electric heaters, 21 turbo-expanders
Tower on 23 times towers 24 of 22 main heat exchangers
25 condenser/evaporators, 26 supercoolers
Embodiment
Principle of the present utility model is to utilize the difference of oxygen nitrogen boiling point in the air, adopts the method for low temperature fractionation to produce high-purity nitrogen.
As shown in Figure 1, high-purity nitrogen plant of the present utility model comprises by the interconnective pretreatment system 1 of pipeline, distillation system 2 and some holders.Described pretreatment system 1 comprises by the interconnective air filter 11 of pipeline, air compressor 12, precooling unit 13, molecular sieve adsorber 14 and electric heater 15.Described distillation system 2 comprises two decompressors parallel with one another 21, is used for the main heat exchanger 22 and the supercooler 26 of heat exchange, and a rectifying tower.Described rectifying tower comprises the following tower 23 that is interconnected, last tower 24 and condenser/evaporator 25.
Described tower 23 down is provided with the compressed-air actuated inlet behind pretreatment system 1 purifying, the described bottom of tower 23 down is the outlet of oxygen-enriched liquid air, the described middle part of tower 23 down is the outlet of middle pressure nitrogen, be connected with middle pressure nitrogen storer 4 by pipeline, the described top of tower 23 down is the outlet of liquid nitrogen, is connected with liquid nitrogen storer 6 by pipeline; The liquid nitrogen outlet at described tower 23 tops down and the pipeline between the liquid nitrogen storer 6 pass described supercooler 26.
Described bottom of going up tower 24 is the outlet of oxygen rich air, link to each other with decompressor 21 by pipeline, described middle part of going up tower 24 is the inlet of oxygen-enriched liquid air, be connected with the outlet of the oxygen-enriched liquid air of following tower 23 bottoms, described top of going up tower 24 is the outlet of two liquid nitrogen inlets and a high purity nitrogen, is connected with low-pressure nitrogen storer 5 by pipeline; The high purity nitrogen outlet at described upward tower 24 tops and the pipeline between the low-pressure nitrogen storer 5 pass described supercooler 26 and main heat exchanger 22.
Described condenser/evaporator 25 is connected with the top of following tower 23, is used for the part liquefaction of nitrogen with following tower 23, and the opposite side of described condenser/evaporator 25 is connected with liquid nitrogen storer 6 by pipeline.
The utility model of underdrawing is below produced the flow process of high-purity nitrogen.
Air is after air filter 11 removes dust and other mechanical impuritys, in air compressor 12, be compressed, cool off and remove profit through aftercooler, enter precooling unit 13 cooling then, enter purifier after separating free-water, removed moisture content, carbonic acid gas by activated alumina and molecular sieve adsorber 14.
Pressurized air behind the purifying enters main heat exchanger 22 to carry out entering down tower 23 bottoms after the heat exchange with nitrogen, the oxygen rich air of backflowing.In following tower 23, air is become high purity nitrogen and oxygen-enriched liquid air by initial gross separation, and the gas nitrogen that partly rises flows out after main heat exchanger 22 re-heats from the middle part of following tower 23 presses nitrogen product the cooling box conduct, is saved in the middle pressure nitrogen storer 4; The gas nitrogen that partly rises liquefies in main condenser vaporizer 25, and the low-tension side rich solution oxygen of main condenser vaporizer is vaporized simultaneously.
Liquid nitrogen is divided into three parts, from top of tower and main condenser vaporizer 25 effusive liquid nitrogen cooling box are saved in the liquid nitrogen storer 6 as liquid nitrogen product down.Another strand liquid nitrogen is drawn from following top of tower, is crossed cold by the effusive low pressure high pure nitrogen of last tower after throttling is sent into tower 24 tops and made phegma through supercooler 26, and all the other liquid nitrogen conducts are the tower phegma down.Tower 24 adopts two liquid nitrogen opening for feeds on the utility model, can select the liquid nitrogen opening for feed according to different operating modes.This preferred embodiment can move under three kinds of operating modes, and the air capacity of processing is respectively 4000,2500,2750Nm
3/ h, and the extraction yield of nitrogen is all about 67%.The bottom of described following tower 23 is the outlet of oxygen-enriched liquid air, and oxygen-enriched liquid air is cold excessively in supercooler 26 to carry out secondary rectifying after tower 24 middle parts are sent in throttling.
Highly purified pressure is approximately the nitrogen of 0.2MPa and draws from last tower 24 tops, and cooling box is saved in the low-pressure nitrogen storer 5 as the low-pressure nitrogen product after supercooler 26, main heat exchanger 22 re-heats.
Oxygen rich air is drawn from last tower bottom, and re-heat enters decompressor 21 after the temperature before expand and produces cold in main heat exchanger 22, through main heat exchanger cooling box after the re-heat again, enters into electric heater 15, as the regeneration gas of molecular sieve adsorber 14.Decompressor 21 enters atmosphere with the waste gas that molecular sieve adsorber 14 produces after sound damper 3 is handled.
The utility model extracts product nitrogen gas from Xia Ta, last tower simultaneously, and nitrogen gas purity all reaches the requirement of GB/T8980-1996 " high purity nitrogen " standard, satisfies the demand of user to different pressures nitrogen simultaneously.To need not increase finishing apparatus for the nitrogen that obtains another kind of pressure, not only prevented product nitrogen gas in last handling process loss and be secondary polluted, also reduced the investment of equipment.
Last tower adopts two liquid nitrogen opening for feeds, can select the liquid nitrogen opening for feed according to different operating modes, thereby makes rectifying tower can adapt to 50% to 120% turndown ratio load.After adopting this technology, this equipment has well solved this difficult point of variable parameter operation on a large scale, the user can adjust the operation condition of high-purity nitrogen plant according to the size of nitrogen use level, problem that can only a part of gas of emptying when having solved the operation of general high-purity nitrogen plant load shedding, thus also reached energy-conservation effect.
The utility model still has multiple concrete embodiment, and all employings are equal to replacement or equivalent transformation and all technical schemes of forming, all drop within the claimed scope of the utility model.
Claims (6)
1. high-purity nitrogen plant, comprise by the interconnective pretreatment system of pipeline (1), distillation system (2) and some holders, it is characterized in that: described distillation system (2) comprises decompressor (21), is used for the main heat exchanger (22) and the supercooler (26) of heat exchange, and a rectifying tower;
Described rectifying tower comprises the following tower (23) that is interconnected, last tower (24) and condenser/evaporator (25);
Described tower (23) down is provided with the compressed-air actuated inlet behind pretreatment system (1) purifying, the described bottom of tower (23) down is the outlet of oxygen-enriched liquid air, the described middle part of tower (23) down is the outlet of middle pressure nitrogen, be connected with middle pressure nitrogen storer (4) by pipeline, the described top of tower (23) down is the outlet of liquid nitrogen, is connected with liquid nitrogen storer (6) by pipeline;
Described bottom of going up tower (24) is the outlet of oxygen rich air, link to each other with decompressor (21) by pipeline, described middle part of going up tower (24) is the inlet of oxygen-enriched liquid air, the outlet of the oxygen-enriched liquid air bottom following tower (23) is connected, described top of going up tower (24) is the outlet of the inlet and the high purity nitrogen of liquid nitrogen, is connected with low-pressure nitrogen storer (5) by pipeline;
Described condenser/evaporator (25) is connected with the top of following tower (23), is used for the part liquefaction of nitrogen of Jiang Xiata (23), and the opposite side of described condenser/evaporator (25) is connected with liquid nitrogen storer (6) by pipeline.
2. high-purity nitrogen plant according to claim 1 is characterized in that: described pretreatment system (1) comprises by the interconnective air filter of pipeline (11), air compressor (12), precooling unit (13), molecular sieve adsorber (14) and electric heater (15).
3. high-purity nitrogen plant according to claim 1 is characterized in that: the described liquid nitrogen inlet of going up the top of tower (24) is two.
4. high-purity nitrogen plant according to claim 1 is characterized in that: described distillation system (2) includes two decompressors (21) that are arranged in parallel, and all is connected with the oxygen rich air outlet of last tower (24) bottom.
5. high-purity nitrogen plant according to claim 1 is characterized in that: the high purity nitrogen outlet at described upward tower (24) top and the pipeline between the low-pressure nitrogen storer (5) pass described supercooler (26) and main heat exchanger (22).
6. high-purity nitrogen plant according to claim 1 is characterized in that: the liquid nitrogen outlet at described tower (23) top down and the pipeline between the liquid nitrogen storer (6) pass described supercooler (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820187136U CN201376900Y (en) | 2008-09-18 | 2008-09-18 | High-purity nitrogen equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820187136U CN201376900Y (en) | 2008-09-18 | 2008-09-18 | High-purity nitrogen equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201376900Y true CN201376900Y (en) | 2010-01-06 |
Family
ID=41517001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820187136U Expired - Lifetime CN201376900Y (en) | 2008-09-18 | 2008-09-18 | High-purity nitrogen equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN201376900Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589250A (en) * | 2012-02-14 | 2012-07-18 | 开封黄河空分集团有限公司 | Process of separating and preparing nitrogen by using air |
| CN106338182A (en) * | 2016-08-25 | 2017-01-18 | 重庆朝阳气体有限公司 | Energy-saving control method for air separating system |
-
2008
- 2008-09-18 CN CN200820187136U patent/CN201376900Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589250A (en) * | 2012-02-14 | 2012-07-18 | 开封黄河空分集团有限公司 | Process of separating and preparing nitrogen by using air |
| CN106338182A (en) * | 2016-08-25 | 2017-01-18 | 重庆朝阳气体有限公司 | Energy-saving control method for air separating system |
| CN106338182B (en) * | 2016-08-25 | 2018-11-06 | 重庆朝阳气体有限公司 | A kind of energy-saving control method of air-seperation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Wuzhong District Mudu town Suzhou city Jiangsu province 215101 Spring Road No. 31 Patentee after: SUZHOU OXYGEN PLANT CO., LTD. Address before: Wuzhong District Mudu town Suzhou city Jiangsu province 215101 Spring Road No. 31 Patentee before: Suzhou Oxygen Plant Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100106 |
|
| CX01 | Expiry of patent term |