CN1645022A - Air separated rectifying process and air separating apparatus - Google Patents
Air separated rectifying process and air separating apparatus Download PDFInfo
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- CN1645022A CN1645022A CN 200510054064 CN200510054064A CN1645022A CN 1645022 A CN1645022 A CN 1645022A CN 200510054064 CN200510054064 CN 200510054064 CN 200510054064 A CN200510054064 A CN 200510054064A CN 1645022 A CN1645022 A CN 1645022A
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- air
- rectifying
- subcooler
- oxygen
- air separation
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Abstract
An air splitting process comprises air compressing, pre-cooling, purifying, swell cooling and distillation. The compressed air is lead to the distillation tower through a quench after swelling for oxygen production. The corresponding device comprises air compressor, pre-cooling unit, zeolite purifier, main converter, turbine, distillation tower and oxygen storage tanks. A quench board for heat exchange is fixed between the main converter and the distillation tower.
Description
Technical field
What the present invention relates to is a kind of air-separating technology and corresponding air separation unit that air separation is become gases such as oxygen, nitrogen, belongs to the air separation technology field.
Background technology
At present, air separation technology both domestic and external has been a kind of comparatively mature technique, its concrete technological process is: raw air enters air compressor it is compressed after air cleaner filters, compressed air comes out the back earlier through the precooling unit, enter molecular sieve purifier again, purified back pressure air enters main heat exchanger and further reduces temperature, enter the turbine expansion device then and carry out swell refrigeration, reduce the temperature of raw air, directly enter rectifying column then and carry out air separation, draw product oxygen in the bottom of last tower, this product oxygen enters the oxygen air storage bag through behind the main heat exchanger, through oxygen compressor oxygen filling is gone in the oxygen cylinder again.Above-mentioned technological process is a low pressure process, operating pressure is at 0.7-0.5Mpa, the employing drag flow expands, equipment with production 350m3/h oxygen product is example, its prepared oxygen purity is 99.6%, and operating pressure is 0.7Mpa, as improving the product oxygen purity, usual way is to increase packed height, but certainly will increase energy consumption like this.
Summary of the invention
The object of the present invention is to provide a kind of air separation rectification process and air separation unit that can improve product oxygen purity energy-conservation, again.A kind of air separation rectification process which comprises at least air compression, precooling, purifying, swell refrigeration, rectifying system oxygen etc., behind the compressed air swell refrigeration by entering tower rectifying system oxygen behind the subcooler.
The low-temperature receiver of described subcooler adopts the product oxygen that tower is drawn in the rectifying, through behind the board-like subcooler with swell refrigeration after compressed air carry out heat exchange.
The air separation unit that a kind of air separation rectifying is used, it includes air compressor, the precooling unit, molecular sieve purifier, main switch, turbo-expander, rectifying column, the oxygen reservoir hag is provided with between described main heat exchanger and the rectifying column for tower in compressed air behind the swell refrigeration and the rectifying and draws the subcooler that product oxygen carries out heat exchange.
Described subcooler is board-like subcooler.
The present invention utilizes subcooler to carry out cold to expanded air, make partial oxygen liquefaction in advance, the effect that substitutes twenties blocks of column plates can be arranged, it is simple to have technological process, compact conformation, can improve the purity of oxygen product effectively, reduce the operating pressure of whole flow process, not only energy-conservation but also can improve characteristics such as product oxygen purity.
Description of drawings
Fig. 1 is a technological process schematic diagram of the present invention.
The specific embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: shown in Figure 1, raw air enters air compressor 2 it is compressed after air cleaner 1 filters, compressed air comes out the back earlier through precooling unit 3, enter molecular sieve purifier 4 again, pressure air after purified enters main heat exchanger 6 and further reduces temperature, enter turbine expansion device 7 then and carry out swell refrigeration, reduce the temperature of raw air, carry out air separation by the last tower that enters rectifying column 8 behind the board-like subcooler 13 behind the compressed air swell refrigeration, rectifying system oxygen is drawn product oxygen and is carried out heat exchange through the compressed air behind board-like subcooler 13 backs and the swell refrigeration in the bottom of last tower; Enter oxygen air storage bag 10 through behind the main heat exchanger 6 again, through oxygen compressor 11 oxygen filling is gone in the oxygen cylinder 12 again.The present invention also disposes a subcooler 9 on rectifying column 8.
The present invention is a kind of improvement to prior art, its tower on being provided with for compressed air behind the swell refrigeration and rectifying between described main heat exchanger 6 and the rectifying column 8 is drawn the board-like subcooler 13 that product oxygen carries out heat exchange, the same oxygen of producing 350m3/h, purity can reach 99.9%, and operating pressure is 0.5Mpa, has the effect of considerable energy saving and raising product purity.
Claims (4)
1, a kind of air separation rectification process which comprises at least air compression, precooling, and purifying, swell refrigeration, rectifying system oxygen is characterized in that behind the described compressed air swell refrigeration by entering tower rectifying system oxygen behind the subcooler.
2, air separation rectification process according to claim 1 is characterized in that the low-temperature receiver of described subcooler adopts the product oxygen that tower is drawn in the rectifying, through behind the board-like subcooler with swell refrigeration after compressed air carry out heat exchange.
3, the air separation unit used of a kind of air separation rectifying, it includes air compressor, the precooling unit, molecular sieve purifier, main switch, turbo-expander, rectifying column, the oxygen reservoir hag is characterized in that being provided with between described main heat exchanger (6) and the rectifying column (8) for tower in compressed air behind the swell refrigeration and the rectifying and draws the subcooler (13) that product oxygen carries out heat exchange.
4, the air separation unit used of air separation rectifying according to claim 3 is characterized in that described subcooler (13) is board-like subcooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510054064 CN1645022A (en) | 2005-03-07 | 2005-03-07 | Air separated rectifying process and air separating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510054064 CN1645022A (en) | 2005-03-07 | 2005-03-07 | Air separated rectifying process and air separating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1645022A true CN1645022A (en) | 2005-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510054064 Pending CN1645022A (en) | 2005-03-07 | 2005-03-07 | Air separated rectifying process and air separating apparatus |
Country Status (1)
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| CN (1) | CN1645022A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929790A (en) * | 2010-08-19 | 2010-12-29 | 苏州制氧机有限责任公司 | High-purity nitrogen equipment |
| CN103148677A (en) * | 2013-01-27 | 2013-06-12 | 南京瑞柯徕姆环保科技有限公司 | Air separation system for isobarically separating oxygen and nitrogen from air |
| CN106744697A (en) * | 2017-01-17 | 2017-05-31 | 孔祥旭 | A kind of super energy-conservation making oxygen by air separation device |
| CN109945662A (en) * | 2017-12-21 | 2019-06-28 | 开封中化换热设备有限公司 | A kind of recycling of smelting waste heat is used for the energy-efficient method of air-seperation system, system and air-separating plant |
| CN110108090A (en) * | 2019-04-26 | 2019-08-09 | 北京科技大学 | A method of reducing air separation unit upper tower pressure and system energy consumption |
-
2005
- 2005-03-07 CN CN 200510054064 patent/CN1645022A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929790A (en) * | 2010-08-19 | 2010-12-29 | 苏州制氧机有限责任公司 | High-purity nitrogen equipment |
| CN103148677A (en) * | 2013-01-27 | 2013-06-12 | 南京瑞柯徕姆环保科技有限公司 | Air separation system for isobarically separating oxygen and nitrogen from air |
| CN103148677B (en) * | 2013-01-27 | 2015-06-10 | 南京瑞柯徕姆环保科技有限公司 | Air separation system for isobarically separating oxygen and nitrogen from air |
| CN106744697A (en) * | 2017-01-17 | 2017-05-31 | 孔祥旭 | A kind of super energy-conservation making oxygen by air separation device |
| CN109945662A (en) * | 2017-12-21 | 2019-06-28 | 开封中化换热设备有限公司 | A kind of recycling of smelting waste heat is used for the energy-efficient method of air-seperation system, system and air-separating plant |
| CN110108090A (en) * | 2019-04-26 | 2019-08-09 | 北京科技大学 | A method of reducing air separation unit upper tower pressure and system energy consumption |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |