CN101955192A - Ammonia-cooled ammonia reclamation method and mating device thereof - Google Patents
Ammonia-cooled ammonia reclamation method and mating device thereof Download PDFInfo
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- CN101955192A CN101955192A CN2010102870025A CN201010287002A CN101955192A CN 101955192 A CN101955192 A CN 101955192A CN 2010102870025 A CN2010102870025 A CN 2010102870025A CN 201010287002 A CN201010287002 A CN 201010287002A CN 101955192 A CN101955192 A CN 101955192A
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Abstract
The invention discloses an ammonia-cooled ammonia reclamation method and a mating device thereof. Gas phase ammonia in purge gas is condensed into liquid ammonia by using the principle of ammonia decompressed evaporation and refrigeration, and the separated liquid ammonia is used as a refrigerant for continuously cooling the gas phase ammonia in the purge gas, over and over again. The eliminated high-pressure equipment and pipelines which still can be continuously used in the ammonia synthesis process are used for decompression to form an ammonia-cooled ammonia reclamation device, wherein the device comprises a purge gas pipeline, a cold and heat exchanger, an ammonia evaporation condenser and a liquid ammonia storage tank; and the formed ammonia-cooled separation circulating process in the purge gas is characterized in that: the liquid ammonia prepared from the purge gas is conveyed into the ammonia evaporation condenser and evaporated into gaseous ammonia so as to obtain a large amount of cold energy, and the gaseous ammonia in the purge gas is continuously cooled so as to fulfill the purpose of separating the gas phase ammonia in the purge gas. The device has the advantages of energy conservation, low investment and good usability.
Description
Technical field
The present invention relates to synthetic ammonia and make a kind of ammonia self-cooled ammonia recovery method of ammonia content in the field, particularly recovering discharging gas, the present invention also comprises the corollary apparatus of this method.
Background technology
In the production of synthetic ammonia, ammonia content reaches more than 50% in the liquid ammonia storage tank off-gas, need to reclaim by the ammonia recovery process, so far, the off-gas ammonia reclaiming process has isobaric ammonia reclaiming process, ammonia still process ammonia reclaiming process, unpowered ammonia reclaiming process etc., but above Technology has ammoniacal liquor surplus, steam consumption height, big, the demanding deficiency of inlet gas foreign matter content of construction investment, needs further improvement.
Summary of the invention
Technical problem to be solved by this invention provides and a kind ofly can remedy above-mentioned deficiency, and is energy-conservation, investment is little, use properties is good discharges a kind of ammonia self-cooled ammonia recovery method and the corollary apparatus thereof that gas ammonia reclaims.
The present invention adopts following technical proposals to solve its technical problem:
A kind of ammonia self-cooled ammonia recovery method, undertaken by following processing step:
A. from the off-gas of liquid ammonia storage tank, contain ammonia 42-48%, 15 ℃ of temperature, enter in the cool-heat-exchanger pipe and pipe between-10 ℃ the cold gas converting heat that discharges, in the cool-heat-exchanger pipe, come out after cooling to 5 ℃, enter in the ammonia evaporative condenser organ pipe, vapor phase ammonia cools to-10 ℃ significantly and is condensed into liquefied ammonia in the ammonia vaporizer-condenser again;
B. the off-gas behind the condensation ammonia is carried the liquefied ammonia droplet secretly and is come out from ammonia vaporizer-condenser bottom, enter once more between the cool-heat-exchanger pipe, off-gas carries out gas-liquid separation between the cool-heat-exchanger pipe, and gas heat in the absorption tube, and the liquefied ammonia separation accumulates at the bottom of the cool-heat-exchanger tower; Off-gas ammonia content after the separation of ammonia is 13% to be warmed up to 5 ℃, goes out from the cool-heat-exchanger cat head and compression-absorption type ammonia recovery process such as send, and the ammonia that continues in the recovering discharging gas drops to 0.05% from 13%, further reclaims ammonia, cleaning of off-gas, so circulation;
C. accumulate in liquefied ammonia at the bottom of the tower by tower at the bottom of leve autocontrol valve drain into the liquefied ammonia hold tank; The liquefied ammonia house steward networking of the liquefied ammonia of liquefied ammonia hold tank and ice maker liquid ammonia storage tank is made finished product and is used;
D. Zheng Fa gas ammonia spends the ice maker compression and is made as liquefied ammonia or ammonia recovery system ammoniacal liquor;
E. the off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters between the cool-heat-exchanger pipe.
The corollary apparatus of described ammonia self-cooled ammonia recovery method comprises off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank.The off-gas pipeline that enters operation connects the tubulation inlet of cool-heat-exchanger, and the by-pass 17 of establishing cool-heat-exchanger connects the off-gas pipeline of operation; The tubulation outlet off-gas pipeline of cool-heat-exchanger connects the tubulation inlet off-gas pipeline 4 of ammonia vaporizer-condenser 16; The tubulation of ammonia vaporizer-condenser 16 outlet off-gas pipeline 18 connects between the pipe of cool-heat-exchanger 14 and enters the mouth; Outlet off-gas pipeline picks out the off-gas pipeline of operation between the pipe of cool-heat-exchanger; Be connected a liquefied ammonia pipeline between the inlet tube of outlet pipe and liquefied ammonia hold tank between the cool-heat-exchanger pipe; The outlet liquefied ammonia pipeline one tunnel of liquefied ammonia hold tank is picked the liquefied ammonia pipeline toward production system, and another road connects inlet liquefied ammonia pipeline between the pipe of ammonia vaporizer-condenser; Outlet gas ammonia pipeline connects the gas ammonia pipeline of deicing machine operation between the pipe of ammonia vaporizer-condenser; The outlet off-gas pipeline of liquefied ammonia hold tank connects the tubulation source line tubulation inlet off-gas pipeline of cool-heat-exchanger.
The present invention utilizes ammonia decompression evaporation refrigerating principle, and the vapor phase ammonia in the off-gas is condensed into liquefied ammonia, again liquefied ammonia is continued vapor phase ammonia in the cooling off-gas as refrigeration agent after the separation, reaches the purpose of separating vapor phase ammonia in the off-gas, so circulation.The corollary apparatus of ammonia self-cooled ammonia recovery method of the present invention, comprise off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank, be the φ 500 synthetic complete production devices that utilized stop production (eliminating), the primary structure of equipment and installation all do not have moving, only the part process pipeline is changed, working pressure is adjusted to 1.6MPa from 30MPa, formed recovery method---the ammonia self-cooled ammonia recovery method of ammonia in a kind of novel liquid ammonia storage tank off-gas.Its beneficial effect is not increase any power consumption, and the ammonia in the liquid ammonia storage tank off-gas is reclaimed in a large number, has reduced energy consumption, material consumption that ammonia reclaims; Reduced the production load that waits compression-absorption type ammonia recovery process of back in a large number, solved ammoniacal liquor expansible problem, made ammonia reclaim that ammonia content levels off to " zero " in the tail gas, environmental protection index obtains breakthrough optimization; Continue to use used equipment, improved utilization rate of raw materials, thereby saved the resource and the energy.
Description of drawings
Fig. 1 is a corollary apparatus synoptic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is further elaborated:
The corollary apparatus of a kind of ammonia self-cooled ammonia recovery method of the present invention comprises off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank.Connect the tubulation inlet 2 of cool-heat-exchanger 14 by the off-gas pipeline 1 that enters operation, and the by-pass 17 of establishing cool-heat-exchanger connects the off-gas pipeline 7 of operation; The tubulation outlet off-gas pipeline 3 of cool-heat-exchanger 14 connects the tubulation inlet off-gas pipeline 4 of ammonia vaporizer-condenser 16; The tubulation of ammonia vaporizer-condenser 16 outlet off-gas pipeline 18 connects between the pipe of cool-heat-exchanger 14 and enters the mouth 5; Outlet off-gas pipeline 6 picks out the off-gas pipeline 7 of operation between the pipe of cool-heat-exchanger 14; Be connected a liquefied ammonia pipeline 8 between the inlet tube of outlet pipe and liquefied ammonia hold tank 15 between the cool-heat-exchanger pipe; The outlet liquefied ammonia pipeline one tunnel of liquefied ammonia hold tank 15 is picked the liquefied ammonia pipeline 9 toward production system, and another road connects inlet liquefied ammonia pipeline 10 between the pipe of ammonia vaporizer-condenser 16; Outlet gas ammonia pipeline 11 connects the gas ammonia pipeline 12 of deicing machine operation between the pipe of ammonia vaporizer-condenser 16; The tubulation that the outlet off-gas pipeline 13 of liquefied ammonia hold tank 15 the connects cool-heat-exchanger 14 2 tubulations inlets off-gas pipeline that enters the mouth.The present invention includes off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank, all be the φ 500 synthetic complete production devices that utilized stop production (eliminating), the primary structure of equipment and installation all do not have moving, only the part process pipeline is changed, working pressure is adjusted to 1.6MPa from 30MPa, form ammonia self-cooled ammonia recovery method.
Principle of work is: from the off-gas of liquid ammonia storage tank, be introduced in the cool-heat-exchanger pipe, and cold off-gas carries out heat exchange between pipe, off-gas after the cooling comes out to enter in the ammonia evaporative condenser organ pipe in the cool-heat-exchanger pipe again, and a large amount of heat exchange between pipe make that ammonia condensing becomes liquefied ammonia in the off-gas, and off-gas is carried secretly and entered between the cool-heat-exchanger pipe after the liquefied ammonia mist goes out ammonia evaporator then, the liquefied ammonia separation of condensation accumulates at the bottom of the cool-heat-exchanger tower, drains into the liquefied ammonia hold tank by leve autocontrol valve at the bottom of the tower; And the off-gas after the separation of ammonia goes isobaric ammonia recovery process further to reclaim ammonia, cleaning of off-gas, so circulation.Liquefied ammonia is sent between ammonia evaporative condenser organ pipe by the decompression of liquefied ammonia hold tank, and liquefied ammonia or the carbonation process system of sending to ammoniacal liquor are made in the gas ammonia deicing machine compression of evaporation.The off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters in the cool-heat-exchanger pipe.
Embodiment 1
1. from the off-gas of liquid ammonia storage tank, contain ammonia 45%, temperature enters in the cool-heat-exchanger pipe for 15 ℃, and the cold gas converting heat that discharges between pipe, in the cool-heat-exchanger pipe, come out after cooling to 5 ℃, enter in the ammonia evaporative condenser organ pipe, vapor phase ammonia cools to-10 ℃ significantly and is condensed into liquefied ammonia in the ammonia vaporizer-condenser again;
2. the off-gas behind the condensation ammonia is carried the liquefied ammonia droplet secretly and is come out from ammonia vaporizer-condenser bottom, enters once more between the cool-heat-exchanger pipe, and off-gas carries out gas heat in gas-liquid separation and the absorption tube between the cool-heat-exchanger pipe, and liquefied ammonia separates and accumulates at the bottom of the cool-heat-exchanger tower; Off-gas after the separation of ammonia is warmed up to 5 ℃, and go out from the interchanger cat head and send the ammonia recovery process further to reclaim ammonia, cleaning of off-gas, so circulation, the off-gas ammonia content of outlet is 13%;
3. accumulate in liquefied ammonia at the bottom of the tower by tower at the bottom of leve autocontrol valve drain into liquid liquefied ammonia hold tank; The liquefied ammonia of liquefied ammonia hold tank and ice maker liquefied ammonia house steward networking are made finished product and are used;
4. the compression of the gas ammonia deicing machine of evaporation is made as liquefied ammonia or ammonia recovery system ammoniacal liquor;
5. the off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters between the cool-heat-exchanger pipe.
Embodiment 2
1. from the off-gas of liquid ammonia storage tank, contain ammonia 42%, temperature enters in the cool-heat-exchanger pipe for 15 ℃, and the cold gas converting heat that discharges between pipe, in the cool-heat-exchanger pipe, come out after cooling to 5 ℃, enter in the ammonia evaporative condenser organ pipe, vapor phase ammonia cools to-10 ℃ significantly and is condensed into liquefied ammonia in the ammonia vaporizer-condenser again;
2. the off-gas behind the condensation ammonia is carried the liquefied ammonia droplet secretly and is come out from ammonia vaporizer-condenser bottom, enters once more between the cool-heat-exchanger pipe, and off-gas carries out gas heat in gas-liquid separation and the absorption tube between the cool-heat-exchanger pipe, and liquefied ammonia separates and accumulates at the bottom of the cool-heat-exchanger tower; Off-gas after the separation of ammonia is warmed up to 5 ℃, and go out from the interchanger cat head and send the ammonia recovery process further to reclaim ammonia, cleaning of off-gas, so circulation, the off-gas ammonia content of outlet is 13%;
3. accumulate in liquefied ammonia at the bottom of the tower by tower at the bottom of leve autocontrol valve drain into liquid liquefied ammonia hold tank; The liquefied ammonia of liquefied ammonia hold tank and ice maker liquefied ammonia house steward networking are made finished product and are used;
4. the compression of the gas ammonia deicing machine of evaporation is made as liquefied ammonia or ammonia recovery system ammoniacal liquor;
5. the off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters between the cool-heat-exchanger pipe.
Embodiment 3
1. from the off-gas of liquid ammonia storage tank, contain ammonia 48%, temperature enters in the cool-heat-exchanger pipe for 15 ℃, and the cold gas converting heat that discharges between pipe, in the cool-heat-exchanger pipe, come out after cooling to 5 ℃, enter in the ammonia evaporative condenser organ pipe, vapor phase ammonia cools to-10 ℃ significantly and is condensed into liquefied ammonia in the ammonia vaporizer-condenser again;
2. the off-gas behind the condensation ammonia is carried the liquefied ammonia droplet secretly and is come out from ammonia vaporizer-condenser bottom, enters once more between the cool-heat-exchanger pipe, and off-gas carries out gas heat in gas-liquid separation and the absorption tube between the cool-heat-exchanger pipe, and liquefied ammonia separates and accumulates at the bottom of the cool-heat-exchanger tower; Off-gas after the separation of ammonia is warmed up to 5 ℃, and go out from the interchanger cat head and send the ammonia recovery process further to reclaim ammonia, cleaning of off-gas, so circulation, the off-gas ammonia content of outlet is 13%;
3. accumulate in liquefied ammonia at the bottom of the tower by tower at the bottom of leve autocontrol valve drain into liquid liquefied ammonia hold tank; The liquefied ammonia of liquefied ammonia hold tank and ice maker liquefied ammonia house steward networking are made finished product and are used;
4. the compression of the gas ammonia deicing machine of evaporation is made as liquefied ammonia or ammonia recovery system ammoniacal liquor;
5. the off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters between the cool-heat-exchanger pipe.
Claims (4)
1. ammonia self-cooled ammonia recovery method is characterized in that being undertaken by following processing step:
A. from the off-gas of liquid ammonia storage tank, contain ammonia 42-48%, 15 ℃ of temperature, enter in the cool-heat-exchanger pipe and pipe between-10 ℃ the cold gas converting heat that discharges, in the cool-heat-exchanger pipe, come out after cooling to 5 ℃, enter in the ammonia evaporative condenser organ pipe, vapor phase ammonia cools to-10 ℃ significantly and is condensed into liquefied ammonia in the ammonia vaporizer-condenser again;
B. the off-gas behind the condensation ammonia is carried the liquefied ammonia droplet secretly and is come out from ammonia vaporizer-condenser bottom, enter once more between the cool-heat-exchanger pipe, off-gas carries out gas-liquid separation between the cool-heat-exchanger pipe, and gas heat in the absorption tube, and the liquefied ammonia separation accumulates at the bottom of the cool-heat-exchanger tower; Off-gas ammonia content after the separation of ammonia is 13% to be warmed up to 5 ℃, goes out from the cool-heat-exchanger cat head and compression-absorption type ammonia recovery process such as send, and the ammonia that continues in the recovering discharging gas drops to 0.05% from 13%, further reclaims ammonia, cleaning of off-gas, so circulation;
C. accumulate in liquefied ammonia at the bottom of the tower by tower at the bottom of leve autocontrol valve drain into the liquefied ammonia hold tank; The liquefied ammonia house steward networking of the liquefied ammonia of liquefied ammonia hold tank and ice maker liquid ammonia storage tank is made finished product and is used;
D. Zheng Fa gas ammonia spends the ice maker compression and is made as liquefied ammonia or ammonia recovery system ammoniacal liquor;
E. the off-gas of liquefied ammonia hold tank turns back to cool-heat-exchanger, converges with the off-gas of liquid ammonia storage tank, enters between the cool-heat-exchanger pipe.
2. a kind of ammonia self-cooled ammonia recovery method as claimed in claim 1 is characterized in that among the described step a that it is 45% that off-gas from liquid ammonia storage tank contains ammonia.
3. the corollary apparatus of an ammonia self-cooled ammonia recovery method as claimed in claim 1, comprise off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank, the off-gas pipeline (1) that it is characterized in that entering operation connects the tubulation inlet (2) of cool-heat-exchanger (14), and the by-pass (17) of establishing cool-heat-exchanger connects the off-gas pipeline (7) of operation; The tubulation outlet off-gas pipeline (3) of cool-heat-exchanger (14) connects the tubulation inlet off-gas pipeline (4) of ammonia vaporizer-condenser (16); The tubulation of ammonia vaporizer-condenser (16) outlet off-gas pipeline (18) connects inlet (5) between the pipe of cool-heat-exchanger (14); Outlet off-gas pipeline (6) picks out the off-gas pipeline (7) of operation between the pipe of cool-heat-exchanger (14); Be connected a liquefied ammonia pipeline (8) between the inlet tube of outlet pipe and liquefied ammonia hold tank (15) between the cool-heat-exchanger pipe; The outlet liquefied ammonia pipeline one tunnel of liquefied ammonia hold tank (15) is picked the liquefied ammonia pipeline (9) toward production system, and another road connects inlet liquefied ammonia pipeline (10) between the pipe of ammonia vaporizer-condenser (16); Outlet gas ammonia pipeline (11) connects the gas ammonia pipeline (12) of deicing machine operation between the pipe of ammonia vaporizer-condenser (16); The outlet off-gas pipeline (13) of liquefied ammonia hold tank (15) connects tubulation inlet (2) tubulation inlet off-gas pipeline of cool-heat-exchanger (14).
4. the corollary apparatus of a kind of ammonia self-cooled ammonia recovery method according to claim 3 is characterized in that described off-gas pipeline, cool-heat-exchanger, ammonia vaporizer-condenser, liquefied ammonia hold tank adopt the 500 superseded synthetic complete production device reconstructions that stopped production to form.
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| CN2010102870025A CN101955192A (en) | 2010-09-17 | 2010-09-17 | Ammonia-cooled ammonia reclamation method and mating device thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389689A (en) * | 2011-10-09 | 2012-03-28 | 刘军 | Powerless low-temperature isobaric ammonia recovering method and isobaric ammonia recovering device |
| CN103505984A (en) * | 2012-06-27 | 2014-01-15 | 沈阳铝镁设计研究院有限公司 | Method for treating ammonia contained in fume of coal ash sintering kiln |
| CN105771820A (en) * | 2016-05-09 | 2016-07-20 | 石宝珍 | Catalyst cooler |
| CN106117010A (en) * | 2016-06-29 | 2016-11-16 | 西南化工研究设计院有限公司 | A kind of acetylene synthesizes the new technology of alkynol with ketone compounds |
| CN106766351A (en) * | 2017-01-18 | 2017-05-31 | 文安县天澜新能源有限公司 | A kind of method and apparatus for eliminating synthesis ammonia freezing post liquid ammonia storage tank emptying |
| CN109292794A (en) * | 2017-07-25 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of gas ammonia recovery system and the method for recycling emission performance gas ammonia |
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2010
- 2010-09-17 CN CN2010102870025A patent/CN101955192A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389689A (en) * | 2011-10-09 | 2012-03-28 | 刘军 | Powerless low-temperature isobaric ammonia recovering method and isobaric ammonia recovering device |
| CN103505984A (en) * | 2012-06-27 | 2014-01-15 | 沈阳铝镁设计研究院有限公司 | Method for treating ammonia contained in fume of coal ash sintering kiln |
| CN103505984B (en) * | 2012-06-27 | 2015-07-22 | 沈阳铝镁设计研究院有限公司 | Method for treating ammonia contained in fume of coal ash sintering kiln |
| CN105771820A (en) * | 2016-05-09 | 2016-07-20 | 石宝珍 | Catalyst cooler |
| CN106117010A (en) * | 2016-06-29 | 2016-11-16 | 西南化工研究设计院有限公司 | A kind of acetylene synthesizes the new technology of alkynol with ketone compounds |
| CN106117010B (en) * | 2016-06-29 | 2018-11-20 | 西南化工研究设计院有限公司 | A kind of acetylene synthesizes the new process of alkynol with ketone compounds |
| CN106766351A (en) * | 2017-01-18 | 2017-05-31 | 文安县天澜新能源有限公司 | A kind of method and apparatus for eliminating synthesis ammonia freezing post liquid ammonia storage tank emptying |
| CN109292794A (en) * | 2017-07-25 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of gas ammonia recovery system and the method for recycling emission performance gas ammonia |
| CN109292794B (en) * | 2017-07-25 | 2021-02-05 | 中国石油化工股份有限公司 | Gas ammonia recovery system and method for recovering exhaust gas ammonia |
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Application publication date: 20110126 |