CN104190200A - Ammonia synthesis waste gas recycling device - Google Patents
Ammonia synthesis waste gas recycling device Download PDFInfo
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- CN104190200A CN104190200A CN201410404046.XA CN201410404046A CN104190200A CN 104190200 A CN104190200 A CN 104190200A CN 201410404046 A CN201410404046 A CN 201410404046A CN 104190200 A CN104190200 A CN 104190200A
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- rectifying column
- argon
- methane
- ammonia
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses an ammonia synthesis waste gas recycling device. The device comprises a decarbonization adsorber, a first heat exchanger, a second heat exchanger, a third heat exchanger, a liquid ammonia rectifying tower, a liquid ammonia rectifying tower condenser, a methane rectifying tower, a methane rectifying tower condenser, an argon rectifying tower and an argon rectifying tower condenser, wherein the decarbonization adsorber is provided with a gas inlet and a first regenerated gas inlet, the liquid ammonia rectifying tower is provided with a liquid ammonia outlet, the methane rectifying tower is provided with a liquid methane outlet, the argon rectifying tower is provided with a liquid argon outlet and a waste gas outlet; the ammonia synthesis waste gas separating device further comprises a hydrogen pipeline with one end connected with the argon rectifying tower, a hydrogen purifying device connected with the hydrogen pipeline, a nitrogen circulating compressor, a nitrogen expander and a nitrogen supplementing port connected with the nitrogen circulating compressor; the hydrogen purifying device is provided with a hydrogen outlet and a second regenerated gas inlet; the recycling device can be used for extracting liquid ammonia, liquid methane, liquid argon, and high-pure hydrogen with relatively high purity from the waste gas.
Description
Technical field
The present invention relates to a kind of device that the waste gas of synthetic ammonia can be recycled of conformability.
Background technology
In the production process of synthetic ammonia, can be to extraneous discharging waste gas, wherein topmost waste gas is that dropping a hint in synthetic tower speeds to exit with ammonia tank, traditional processing method mainly contains three kinds at present: the one, this waste gas is divided into two strands, washing separately, obtain the ammoniacal liquor that quality is lower, then remainder of exhaust gas is burnt; The 2nd, the pressure energy in ammonia tank off-gas is all utilized, produce a part of ammonia, then residual gas is burnt, the washing of dropping a hint of synthetic tower is obtained to the ammoniacal liquor that quality is lower simultaneously, then remainder of exhaust gas is burnt; The 3rd, by the washing of whole waste gas, then separated by upper a set of pressure-variable adsorption or film, and remaining gas is carried out to cryogenic separation obtain a part of liquefied natural gas.The feature of above three kinds of techniques is that equipment is complicated, and different equipment comes from again different producers, lacks the theory of Uniting, does not accomplish the slitless connection between equipment and equipment, once an equipment breaks down, its upstream device all cannot move; Meanwhile, in waste gas in synthesizing ammonia, not only contain ammonia, hydrogen, methane, also contain argon, nitrogen of high added value etc., in above traditional handicraft, the recovery rate of hydrogen only has 90%, can not extract argon, and the extraction of ammonia can only produce with the form of ammoniacal liquor or ammonia, recovery utilization rate is very low.
Summary of the invention
In order to overcome the defect of prior art, the object of this invention is to provide a kind of waste gas in synthesizing ammonia recycle device, comprise the decarburization absorber that connects successively and be communicated with, First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, liquefied ammonia rectifying column, liquefied ammonia rectifying column condenser, methane rectifying column, methane rectifying column condenser, argon gas rectifying column, argon air tower rectifying column condenser, described decarburization absorber is provided with air inlet, the first regeneration gas air inlet, described liquefied ammonia rectifying column is provided with liquefied ammonia outlet, and described methane rectifying column is provided with liquid methane outlet, and described argon gas rectifying column is provided with liquid argon outlet, outlet port, is characterized in that: described waste gas in synthesizing ammonia recycle device also comprises that one end connects the Hydrogen Line of described argon gas rectifying column, with the hydrogen purification device that described Hydrogen Line is connected, nitrogen circulation compressor, nitrogen expansion unit, with the nitrogen gas supplementing opening that the import of described nitrogen circulation compressor is connected, described hydrogen purification device is provided with hydrogen outlet, the second regeneration gas air inlet.
Preferably, described waste liquid ammonia rectifying column, liquefied ammonia rectifying column condenser, methane rectifying column, methane rectifying column condenser, argon gas rectifying column, argon air tower rectifying column condenser, nitrogen expansion machine and each heat exchanger are placed in same fractionating column.
Compared to prior art, the present invention can disposablely reclaim liquefied ammonia, liquid methane, liquid argon, the high-purity hydrogen that purity is higher in waste gas in synthesizing ammonia, greatly reduced waste, make gas componant as much as possible in waste gas obtain secondary utilization, can significantly improve gas effciency, also there is very high economic worth.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of waste gas in synthesizing ammonia recycle device of the present invention.
In accompanying drawing:
1-air inlet, 2-decarburization absorber, 3-First Heat Exchanger, 4-the second heat exchanger, 5-the 3rd heat exchanger, 6-liquefied ammonia rectifying column, the outlet of 7-liquefied ammonia, 8-methane rectifying column, the outlet of 9-liquid methane, 10-methane rectifying column condenser, 11-argon gas rectifying column, the outlet of 12-liquid argon, 13-argon gas rectifying column condenser, 14-Hydrogen Line, 15-hydrogen purification device, 16-hydrogen outlet, 17-outlet port, 18-nitrogen gas supplementing opening, 19-nitrogen circulation compressor, 20-nitrogen expansion unit, 21-liquefied ammonia rectifying column condenser, 22-the first regeneration gas air inlet, 23-the second regeneration gas air inlet.
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of waste gas in synthesizing ammonia recycle device of the present invention is elaborated.
Accompanying drawing 1 has illustrated the structural representation of waste gas in synthesizing ammonia recycle device of the present invention.Waste gas in synthesizing ammonia is from air inlet 1 access to plant, successively by decarburization absorber 2, First Heat Exchanger 3, liquefied ammonia rectifying column 6, liquefied ammonia rectifying column condenser 21, the second heat exchanger 4, the 3rd heat exchanger 5, methane rectifying column 8, methane rectifying column condenser 10, argon gas rectifying column 11, argon gas rectifying column condenser 13, now remaining gas is the mixture of hydrogen and other gases, wherein hydrogen is purified towards Hydrogen Line 14, and all the other nontoxic minimum gas emit by outlet port 17; Hydrogen Line 14 connects hydrogen purification device 15, obtains highly purified hydrogen subsequently by hydrogen outlet 16.Nitrogen by nitrogen circulation compressor 19 compression after, enter after the 20 pressurized end superchargings of nitrogen expansion unit successively by after First Heat Exchanger 3, the second heat exchanger 4, nitrogen expansion unit 20 expanding ends, the 3rd heat exchanger 5, the second heat exchanger 4, First Heat Exchanger 3 and nitrogen gas supplementing opening 18 import that enters nitrogen circulation compressor 19 after converging.Nitrogen enters to extract out before nitrogen expansion unit 20 expanding ends a part and enters and send into methane rectifying column condenser 10, argon gas rectifying column condenser 13, liquefied ammonia rectifying column condenser 21 after the 3rd heat exchanger 5 cold is provided.The first regeneration gas air inlet 22 provides regeneration required source of the gas for decarburization absorber 2, and the second regeneration gas air inlet 23 provides regeneration required source of the gas for hydrogen purification device.
Below above-mentioned each device is specifically described.
Waste gas in synthesizing ammonia enters decarburization absorber 2 by air inlet 1, after the impurity such as carbon dioxide are sloughed in the absorption of adsorbent, enters First Heat Exchanger 3.Adsorbent is after the absorption of a period of time will be saturated, waste gas in synthesizing ammonia is switched to another absorbing cylinder by a series of switch valves and continues absorption, the adsorbent adsorbing in saturated absorbing cylinder need be resolved away the material of absorption, by the nitrogen heating adsorption agent of the first regeneration gas air inlet 22, to obtain, regenerates.The object of First Heat Exchanger 3 is that waste gas in synthesizing ammonia is lowered the temperature for the first time, makes part ammoniacal liquor wherein, so its outlet temperature general control is at ammonia near the boiling point under current air pressure; What be connected with the outlet of First Heat Exchanger 3 is liquefied ammonia rectifying column 6, when waste gas in synthesizing ammonia enters liquefied ammonia rectifying column 6, carry out rectifying when interior, at the bottom of liquefied ammonia rectifying column, obtain liquefied ammonia, by liquefied ammonia, export 7 and discharge and tinnings, this liquefied ammonia purity is higher, can directly to market, sell.
Through liquefied ammonia rectifying column 6 extract after liquefied ammonia, waste gas in synthesizing ammonia enters the second heat exchanger 4 and lowers the temperature for the third time, due to the boiling point of the ammonia boiling point far above methane, argon, therefore be necessary first the temperature of residual gas to be down in the lump to a lower value after extracting ammonia, liquefaction one by one again, and this temperature-fall period does not produce any liquid gas product.
Next flow process that waste gas in synthesizing ammonia reclaims is successively by methane rectifying column 8, methane rectifying column condenser 10 and argon gas rectifying column 11, argon gas rectifying column condenser 13, carrying out successively the 4th time lowers the temperature with the 5th time, respectively gas temperature is reduced to below the boiling point of the following and argon of the boiling point of methane, extract liquid methane and liquid argon that purity is higher, and from liquid methane outlet 9 and liquid argon outlet 12, discharge and tinning respectively, equally, these two kinds of fluid products also can directly be sold to market.
Extracting respectively liquefied ammonia, after liquid methane and liquid argon, the remaining hydrogen of main component of waste gas in synthesizing ammonia, nitrogen and other gas, in traditional handicraft, these gases can directly discharge, for example from outlet port 17, discharge, but in the present embodiment, on argon gas rectifying column, be provided with independent Hydrogen Line 14, for raw hydrogen is derived, Hydrogen Line 14 is connected on hydrogen purification device 15, for raw hydrogen is further purified, here hydrogen purification device 15 can be used Special adsorbent, this adsorbent selectively adsorbs medium, wherein hydrogen especially easily passes through, other medium is adsorbed agent absorption, then through the hydrogen of purifying, by the hydrogen outlet 16 being arranged on hydrogen purification device 15, exported again, can directly output to and need the station of hydrogen place.
The required cold of this covering device has nitrogen to provide.Nitrogen is brought up to 30bar by pressure after nitrogen circulation compressor 19, enter nitrogen expansion unit 20 pressurized ends and continue to be pressurized to enter after 50bar and in heat exchanger, be cooled to the temperature before required expansion, after expansion, by heat exchanger, reclaim and after cold and nitrogen gas supplementing opening 18 converge, enter nitrogen compressor 19 and continue circulation swell refrigerations.Liquefied ammonia rectifying column condenser 21, methane rectifying column condenser 10, argon gas rectifying column condenser 13 required low-temperature receivers are after the 3rd heat exchanger 5, to be liquefied and provided for liquid nitrogen by the nitrogen of extracting out before expanding.Nitrogen after gasification converges to outlet port 17 discharges.
Compared to prior art, waste gas in synthesizing ammonia recycle device of the present invention is integrated a plurality of devices to waste gas in synthesizing ammonia separation and Extraction in prior art, can reclaim highly purified liquefied ammonia, liquid methane, liquid argon, high-purity hydrogen, reduced waste, improve efficiency, also created extra economic worth.
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (2)
1. a waste gas in synthesizing ammonia recycle device, comprises the decarburization absorber (2) that connects successively and be communicated with, First Heat Exchanger (3), the second heat exchanger (4), the 3rd heat exchanger (5), liquefied ammonia rectifying column (6), liquefied ammonia rectifying column condenser (21), methane rectifying column (8), methane rectifying column condenser (10), argon gas rectifying column (11), argon air tower rectifying column condenser (13), described decarburization absorber (2) is provided with air inlet (1), the first regeneration gas air inlet (22), described liquefied ammonia rectifying column (6) is provided with liquefied ammonia outlet (7), and described methane rectifying column (8) is provided with liquid methane outlet (9), and described argon gas rectifying column (11) is provided with liquid argon outlet (12), outlet port (17), is characterized in that: described waste gas in synthesizing ammonia recycle device also comprises that one end connects the Hydrogen Line (14) of described argon gas rectifying column (11), the hydrogen purification device (15) being connected with described Hydrogen Line (14), nitrogen circulation compressor (19), nitrogen expansion unit (20), with the nitrogen gas supplementing opening (18) that the import of described nitrogen circulation compressor (19) is connected, described hydrogen purification device (15) is provided with hydrogen outlet (16), the second regeneration gas air inlet (23).
2. waste gas in synthesizing ammonia recycle device according to claim 1, is characterized in that: described waste liquid ammonia rectifying column (6), methane rectifying column (8), methane rectifying column condenser (10), argon gas rectifying column (11), argon air tower rectifying column condenser (13), nitrogen expansion unit (20) and each heat exchanger are placed in same fractionating column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410404046.XA CN104190200B (en) | 2014-08-15 | 2014-08-15 | A kind of waste gas in synthesizing ammonia recycle device |
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| CN201410404046.XA CN104190200B (en) | 2014-08-15 | 2014-08-15 | A kind of waste gas in synthesizing ammonia recycle device |
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| CN104190200A true CN104190200A (en) | 2014-12-10 |
| CN104190200B CN104190200B (en) | 2016-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766672A (en) * | 2016-11-08 | 2017-05-31 | 苏州金宏气体股份有限公司 | Device based on swell refrigeration purification ammonia and the method with device purification ammonia |
| CN107758619A (en) * | 2017-10-18 | 2018-03-06 | 浙江海天气体有限公司 | Nitrogen hydrogen ammonia gaseous mixture purifying plant |
| CN112850744A (en) * | 2020-12-29 | 2021-05-28 | 海宁市英德赛电子有限公司 | High-purity ammonia waste gas treatment device |
| CN114891546A (en) * | 2022-06-08 | 2022-08-12 | 佛燃能源集团股份有限公司 | System and method for preparing hydrogen and fuel-grade natural gas by using purge gas of synthetic ammonia |
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| US20100115991A1 (en) * | 2008-09-22 | 2010-05-13 | Jungerhans Robert R J | Purification of gases in synthesis gas production process |
| CN102419071A (en) * | 2011-12-12 | 2012-04-18 | 杭州中泰深冷技术股份有限公司 | Separation and recycling device and recycling method for methane and argon in synthetic ammonia relief gas |
| CN203593618U (en) * | 2013-12-18 | 2014-05-14 | 大连欧科膜技术工程有限公司 | Device for recycling hydrogen and ammonia in synthesis ammonia purge gas |
| CN203971683U (en) * | 2014-08-15 | 2014-12-03 | 苏州市兴鲁空分设备科技发展有限公司 | A kind of waste gas in synthesizing ammonia recycle device |
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2014
- 2014-08-15 CN CN201410404046.XA patent/CN104190200B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100115991A1 (en) * | 2008-09-22 | 2010-05-13 | Jungerhans Robert R J | Purification of gases in synthesis gas production process |
| CN102419071A (en) * | 2011-12-12 | 2012-04-18 | 杭州中泰深冷技术股份有限公司 | Separation and recycling device and recycling method for methane and argon in synthetic ammonia relief gas |
| CN203593618U (en) * | 2013-12-18 | 2014-05-14 | 大连欧科膜技术工程有限公司 | Device for recycling hydrogen and ammonia in synthesis ammonia purge gas |
| CN203971683U (en) * | 2014-08-15 | 2014-12-03 | 苏州市兴鲁空分设备科技发展有限公司 | A kind of waste gas in synthesizing ammonia recycle device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766672A (en) * | 2016-11-08 | 2017-05-31 | 苏州金宏气体股份有限公司 | Device based on swell refrigeration purification ammonia and the method with device purification ammonia |
| CN106766672B (en) * | 2016-11-08 | 2019-05-31 | 苏州金宏气体股份有限公司 | Device based on swell refrigeration purification ammonia and the method with device purification ammonia |
| CN107758619A (en) * | 2017-10-18 | 2018-03-06 | 浙江海天气体有限公司 | Nitrogen hydrogen ammonia gaseous mixture purifying plant |
| CN112850744A (en) * | 2020-12-29 | 2021-05-28 | 海宁市英德赛电子有限公司 | High-purity ammonia waste gas treatment device |
| CN114891546A (en) * | 2022-06-08 | 2022-08-12 | 佛燃能源集团股份有限公司 | System and method for preparing hydrogen and fuel-grade natural gas by using purge gas of synthetic ammonia |
| CN114891546B (en) * | 2022-06-08 | 2022-12-09 | 佛燃能源集团股份有限公司 | System and method for preparing hydrogen and fuel-grade natural gas by using purge gas of synthetic ammonia |
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| CN104190200B (en) | 2016-05-11 |
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