CN104132505B - A kind of waste gas in synthesizing ammonia reclaims comprehensive utilization device - Google Patents

A kind of waste gas in synthesizing ammonia reclaims comprehensive utilization device Download PDF

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CN104132505B
CN104132505B CN201410403070.1A CN201410403070A CN104132505B CN 104132505 B CN104132505 B CN 104132505B CN 201410403070 A CN201410403070 A CN 201410403070A CN 104132505 B CN104132505 B CN 104132505B
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nitrogen
rectifying column
argon
hydrogen
ammonia
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CN104132505A (en
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马昆
孙宁
奚永龙
颜爱国
苗珑耀
叶秋芳
黄岩岩
赵翠玲
王凯
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SUZHOU XINGLU AIR SEPARATION PLANT SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
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SUZHOU XINGLU AIR SEPARATION PLANT SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0276—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of H2/N2 mixtures, i.e. of ammonia synthesis gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/028—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of noble gases
    • F25J3/0285—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of noble gases of argon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/20—H2/N2 mixture, i.e. synthesis gas for or purge gas from ammonia synthesis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/02—Mixing or blending of fluids to yield a certain product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/04—Recovery of liquid products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/02—Separating impurities in general from the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/14—External refrigeration with work-producing gas expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/42—Quasi-closed internal or closed external nitrogen refrigeration cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The invention discloses a kind of waste gas in synthesizing ammonia and reclaim comprehensive utilization device, including the decarburization adsorber being sequentially connected with and connecting, First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, liquefied ammonia rectifying column, liquefied ammonia rectifying column condenser, methane rectifier column, methane rectifier column condenser, argon rectifying column, argon air tower rectifying column condenser, described decarburization adsorber is provided with air inlet, regeneration gas air inlet, liquefied ammonia rectifying column is provided with liquefied ammonia outlet, methane rectifier column is provided with liquid methane outlet, and described argon rectifying column is provided with liquid argon outlet, outlet port；Also include the nitrogen gas supplementing opening that one end connects nitrogen buffer tank that the Hydrogen Line of argon rectifying column is connected with Hydrogen Line, nitrogen hydrogen proportioning tank, nitrogen circulation compressor, nitrogen expansion machine are connected with nitrogen circulation compressor inlet, nitrogen hydrogen proportioning tank is additionally provided with nitrogen and hydrogen mixture and exports；This recovery comprehensive utilization device can DNA purity is higher from waste gas liquefied ammonia, liquid methane, liquid argon.

Description

A kind of waste gas in synthesizing ammonia reclaims comprehensive utilization device
Technical field
The present invention relates to the device that the waste gas recovery of synthesis ammonia can be utilized of a kind of conformability.
Background technology
In the production process of synthesis ammonia, can outwardly discharge waste gas, the most topmost waste gas is dropping a hint and ammonia tank periodic off-gases in synthetic tower, the most traditional processing method mainly has three kinds: one to be that this waste gas is divided into two strands, individually washing, obtain the ammonia that quality is relatively low, then remainder of exhaust gas is burnt；Two is to be produced a part of ammonia all of falling, then burnt by residual gas by the pressure in ammonia tank off-gas, the washing of dropping a hint of synthetic tower is obtained the ammonia that quality is relatively low simultaneously, is then burnt by remainder of exhaust gas；Three is to be washed by whole waste gas, then by upper a set of pressure-variable adsorption or membrance separation, and remaining gas is carried out cryogenic separation obtain a part liquefied natural gas.The feature of three of the above technique is that equipment is complicated, and different equipment comes from again different producers, lacks the theory of Uniting, does not accomplishes the slitless connection between equipment and equipment, and once an equipment breaks down, and equipment all cannot run downstream；Meanwhile, not containing only ammonia, hydrogen, methane in waste gas in synthesizing ammonia, possibly together with the argon of high added value, nitrogen etc., in above traditional handicraft, the extraction ratio of hydrogen only has 90%, it is impossible to extracting argon, and the extraction of ammonia can only produce with the form of ammonia or ammonia, recovery utilization rate is the lowest.
Summary of the invention
nullIn order to overcome the defect of prior art，It is an object of the invention to provide a kind of waste gas in synthesizing ammonia and reclaim comprehensive utilization device，Including the decarburization adsorber being sequentially connected with and connecting、First Heat Exchanger、Second heat exchanger、3rd heat exchanger、Liquefied ammonia rectifying column、Liquefied ammonia rectifying column condenser、Methane rectifier column、Methane rectifier column condenser、Argon rectifying column、Argon air tower rectifying column condenser，Described decarburization adsorber is provided with air inlet、Regeneration gas air inlet，Described liquefied ammonia rectifying column is provided with liquefied ammonia outlet，Described methane rectifier column is provided with liquid methane outlet，Described argon rectifying column is provided with liquid argon outlet、Outlet port，It is characterized in that: described waste gas in synthesizing ammonia segregation apparatus also includes that one end connects the Hydrogen Line of described argon rectifying column、The nitrogen buffer tank being connected with described Hydrogen Line、Nitrogen hydrogen proportioning tank、Nitrogen circulation compressor、Nitrogen expansion unit、The nitrogen gas supplementing opening that import with nitrogen circulation compressor is connected，Nitrogen and hydrogen mixture outlet it is additionally provided with on described nitrogen hydrogen proportioning tank.
Preferably, described waste liquid ammonia rectifying column, methane rectifier column, methane rectifier column condenser, argon rectifying column, argon air tower rectifying column condenser, nitrogen expansion unit and each heat exchanger are placed in same fractionating column.
Compared to prior art, the present invention disposably can reclaim the higher liquefied ammonia of purity, liquid methane, liquid argon in waste gas in synthesizing ammonia, directly Hydrogen Separation therein proportioning nitrogen can also be synthesized ammonia again simultaneously, greatly reduce waste, in making waste gas, gas componant as much as possible obtains secondary utilization, gas effciency can be significantly improved, it may have the highest economic worth.
Accompanying drawing explanation
Accompanying drawing 1 reclaims the schematic diagram of comprehensive utilization device for waste gas in synthesizing ammonia of the present invention.
In accompanying drawing:
1-air inlet, 2-decarburization adsorber, 3-First Heat Exchanger, 4-the second heat exchanger, 5-the 3rd heat exchanger, 6-liquefied ammonia rectifying column, 7-liquefied ammonia exports, 8-methane rectifier column, 9-liquid methane exports, 10-methane rectifier column condenser, 11-argon rectifying column, 12-liquid argon exports, 13-argon rectifying column condenser, 14-Hydrogen Line, 15-nitrogen buffer tank, 16-nitrogen hydrogen proportioning tank, 17-outlet port, 18-nitrogen gas supplementing opening, 19-nitrogen circulation compressor, 20-nitrogen expansion unit, 21-liquefied ammonia rectifying column condenser, 22-nitrogen and hydrogen mixture exports, 23-decarburization adsorber regeneration gas air inlet.
Detailed description of the invention
The preferred implementation that waste gas in synthesizing ammonia of the present invention reclaims comprehensive utilization device below in conjunction with the accompanying drawings is described in detail.
Accompanying drawing 1 depicts waste gas in synthesizing ammonia of the present invention and reclaims the structural representation of comprehensive utilization device.Waste gas in synthesizing ammonia enters device from air inlet 1, pass sequentially through decarburization adsorber 2, First Heat Exchanger 3, liquefied ammonia rectifying column 6, liquefied ammonia rectifying column condenser the 21, second heat exchanger the 4, the 3rd heat exchanger 5, methane rectifier column 8, methane rectifier column condenser 10, argon rectifying column 11, argon rectifying column condenser 13, the most remaining gas is the mixture of hydrogen and other gases, wherein hydrogen purifies towards Hydrogen Line 14, and remaining nontoxic minimum gas is emitted by outlet port 17；Hydrogen Line 14 connects nitrogen buffer tank 15, nitrogen hydrogen proportioning tank 16 connects, wherein nitrogen buffer tank 15 is used for providing nitrogen, in nitrogen hydrogen proportioning tank 16, hydrogen and nitrogen press 3:1 proportioning, then by nitrogen and hydrogen mixture outlet 22 output to synthetic tower re-starts the synthesis of ammonia.After nitrogen is compressed by nitrogen circulation compressor 19, enter after entering First Heat Exchanger the 3, second heat exchanger 4, nitrogen expansion unit 20 expanding end, the 3rd heat exchanger the 5, second heat exchanger 4, First Heat Exchanger 3 after nitrogen expansion unit 20 pressurized end supercharging and nitrogen gas supplementing opening 18 converge after enter nitrogen circulation compressor 19 import.Nitrogen is extracted out before entering nitrogen expansion unit 20 expanding end after being partly into the 3rd heat exchanger 5 and is sent into methane rectifier column condenser 10, argon rectifying column condenser 13, liquefied ammonia rectifying column condenser 21 provide cold.The regeneration gas air inlet 23 of decarburization adsorber provides the source of the gas needed for regeneration for decarburization adsorber 2.
Below above-mentioned each device is specifically described.
Waste gas in synthesizing ammonia enters decarburization adsorber 2 by air inlet 1, enters First Heat Exchanger 3 after the impurity such as carbon dioxide are sloughed in the absorption of adsorbent.Adsorbent through a period of time absorption will saturated after, waste gas in synthesizing ammonia is switched to another absorbing cylinder by a series of switch valves and continues absorption, adsorb the adsorbent in saturated absorbing cylinder need to be resolved away by the material of absorption, add heat-adsorbent to obtain regeneration by the nitrogen of regeneration gas air inlet 23.The purpose of First Heat Exchanger 3 is to carry out waste gas in synthesizing ammonia lowering the temperature for the first time so that it is in part ammoniacal liquor, therefore its outlet temperature general control at ammonia near the boiling point under current gas pressure；Be connected with the outlet of First Heat Exchanger 3 is liquefied ammonia rectifying column 6, carry out rectification when waste gas in synthesizing ammonia enters in liquefied ammonia rectifying column 6, obtain liquefied ammonia in the bottom of liquefied ammonia rectifying column 6, by liquefied ammonia outlet 7 discharge tinning, this liquefied ammonia purity is higher, can directly sell to market.
Have passed through after liquefied ammonia rectifying column 6 extracts liquefied ammonia, waste gas in synthesizing ammonia enters the second heat exchanger 4 to carry out lowering the temperature for the third time, owing to the boiling point of ammonia is far above methane, the boiling point of argon, it is therefore desirable to first the temperature of residual gas is down in the lump a lower value after extracting ammonia, liquefy the most one by one, and this temperature-fall period does not produce any liquid gas product.
The downstream that waste gas in synthesizing ammonia reclaims is to pass sequentially through methane rectifier column 8, methane rectifier column condenser 10 and argon rectifying column 11, argon rectifying column condenser 13, carry out the 4th time successively to lower the temperature with the 5th time, respectively gas temperature is reduced to below below the boiling point of methane and the boiling point of argon, extract the higher liquid methane of purity and liquid argon, and respectively from liquid methane outlet 9 and liquid argon outlet 12 discharge tinning, equally, both fluid products can also directly be sold to market.
After being extracted liquefied ammonia, liquid methane and liquid argon respectively, the main component of waste gas in synthesizing ammonia is left hydrogen, nitrogen and other gases, in traditional handicraft, these gases can directly discharge, such as, discharge from outlet port 17, but in the present embodiment, after hydrogen in composition is collected again, again become nitrogen and hydrogen mixture with a certain amount of nitrogen proportioning, nitrogen and hydrogen mixture return synthetic tower is as Material synthesis ammonia, to reach to maximally utilize hydrogen in waste gas.Specific implementation method is, liquid argon rectifying column 11 is provided with the Hydrogen Line 14 being separately separated by hydrogen and exporting, hydrogen is transported in nitrogen hydrogen proportioning tank 16, simultaneously, additionally arranging the nitrogen buffer tank 15 of an offer nitrogen, connect with nitrogen hydrogen proportioning tank 16, nitrogen and hydrogen carry out proportioning in nitrogen hydrogen proportioning tank, generate syngas for synthetic ammonia, so can directly return synthetic tower as unstripped gas by the nitrogen and hydrogen mixture outlet 22 being located on nitrogen hydrogen proportioning tank.Preferably, according to nitrogen, the hydrogen atom number of ammonia, the volume ratio of nitrogen Yu hydrogen is controlled at 1:3, so can reach the highest proportioning efficiency.
Cold needed for this covering device has nitrogen to provide.Nitrogen pressure is increased to 30bar after nitrogen circulation compressor 19, enter the temperature before expanding needed for being cooled in entering heat exchanger after nitrogen expansion unit 20 pressurized end continues to be pressurized to 50bar, reclaim entrance nitrogen circulation compressor 19 after cold converges with nitrogen gas supplementing opening 18 by heat exchanger after expansion and continue cycling through swell refrigeration.Low-temperature receiver needed for liquefied ammonia rectifying column condenser 21, methane rectifier column condenser 10, argon rectifying column condenser 13 is to be liquefied after the 3rd heat exchanger 5 by the nitrogen of extraction before expanding to provide into liquid nitrogen.Nitrogen after gasification converges to outlet port 17 and discharges.
Compared to prior art, waste gas in synthesizing ammonia of the present invention reclaims comprehensive utilization device and method and is integrated by multiple devices to waste gas in synthesizing ammonia separation and Extraction in prior art, highly purified liquefied ammonia, liquid methane, liquid argon can be reclaimed, hydrogen in waste gas can be carried out the synthesis of ammonia simultaneously again, decrease waste, improve efficiency, also create extra economic worth.
Above-described embodiment is only for technology design and the feature of the explanation present invention; its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this; can not limit the scope of the invention with this; all equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.

Claims (2)

  1. null1. a waste gas in synthesizing ammonia reclaims comprehensive utilization device，Including the decarburization adsorber (2) being sequentially connected with and connecting、First Heat Exchanger (3)、Second heat exchanger (4)、3rd heat exchanger (5)、Liquefied ammonia rectifying column (6)、Liquefied ammonia rectifying column condenser (21)、Methane rectifier column (8)、Methane rectifier column condenser (10)、Argon rectifying column (11)、Argon air tower rectifying column condenser (13)，Described decarburization adsorber (2) is provided with air inlet (1)、Regeneration gas air inlet (23)，Described liquefied ammonia rectifying column (6) is provided with liquefied ammonia outlet (7)，Described methane rectifier column (8) is provided with liquid methane outlet (9)，Described argon rectifying column (11) is provided with liquid argon outlet (12)、Outlet port (17)，It is characterized in that: described waste gas in synthesizing ammonia segregation apparatus also includes that one end connects the Hydrogen Line (14) of described argon rectifying column (11)、The nitrogen buffer tank (15) being connected with described Hydrogen Line (14)、Nitrogen hydrogen proportioning tank (16)、Nitrogen circulation compressor (19)、Nitrogen expansion unit (20)、The nitrogen gas supplementing opening (18) that import with nitrogen circulation compressor (19) is connected，Nitrogen and hydrogen mixture outlet (22) it is additionally provided with on described nitrogen hydrogen proportioning tank (16).
  2. Waste gas in synthesizing ammonia the most according to claim 1 reclaims comprehensive utilization device, it is characterised in that: described liquefied ammonia rectifying column (6), methane rectifier column (8), methane rectifier column condenser (10), argon 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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CN107539967B (en) * 2017-09-13 2023-11-03 湖北和远气体股份有限公司 System for improving purification and separation stability and argon extraction rate of synthesis ammonia purge gas

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