CN204987654U - Device is used multipurposely to synthetic ammonia tail gas - Google Patents
Device is used multipurposely to synthetic ammonia tail gas Download PDFInfo
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- CN204987654U CN204987654U CN201520528590.5U CN201520528590U CN204987654U CN 204987654 U CN204987654 U CN 204987654U CN 201520528590 U CN201520528590 U CN 201520528590U CN 204987654 U CN204987654 U CN 204987654U
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Abstract
The utility model relates to a device is used multipurposely to synthetic ammonia tail gas for handle the tail gas that the synthetic ammonia process was discharged, it includes the clean system that goes on purifying to tail gas, liquefies with the ammonia recovery system that obtains the gas behind product liquid ammonia and the separation ammonia, carries out the clean system again of deamination decarbonization processing, the rectification system who carries out rectification to the gas after the deamination decarbonization to the gas behind the separation ammonia the tail gas after purifying. The utility model discloses a various compositions of device is used multipurposely to synthetic ammonia tail gas in can make full use of synthetic ammonia tail gas accomplish comprehensive recycle of resource, and its consumed energy are lower, can steady in a long -termly move, have improved efficiency, waste is reduced.
Description
Technical field
The utility model relates to a kind of device fully utilizing synthetic ammonia tailgas.
Background technology
In the production process of synthetic ammonia, can outwardly discharge many chemical industry tail gas, wherein topmost tail gas is dropping a hint and ammonia tank flashed vapour in synthetic tower, and the key component of this part gas is ammonia, hydrogen, methane, nitrogen and argon gas.The recycling of traditional synthetic ammonia tailgas comprises two parts: one is the recovery section to ammonia in tail gas, and two is the recovery section to hydrogen in tail gas.
The tail gas that liquid ammonia storage tank flashed vapour discharges with synthesis ammonia system mixes, and enters absorption tower, and the ammonia in gaseous mixture is generated the high ammoniacal liquor of concentration by soft water absorption, ammoniacal liquor sends into ammonia destilling tower, utilize high pressure steam heating, the ammonia in ammoniacal liquor is distilled out of, after drying as product; And weak aqua ammonia out at the bottom of tower delivers to urea plant.Except in the tail gas after ammonia, ammonia content is lower, and it enters the purification that UF membrane or pressure-swing absorption apparatus carry out hydrogen again; Hydrogen after purification is again as the unstripped gas of synthetic ammonia, and the hydrogen of not purifying and all methane and argon gas etc. enter waste heat boiler burning and produce steam for ammonia still process.
The washing evaporation power consumption used of this ammonia reclaiming process is comparatively large, and operating cost is comparatively large, the ammonia be separated in technique and hydrogen product purity not high, and methane in synthetic ammonia tailgas and argon gas etc. there is no Appropriate application, cause the profligacy of resource.Therefore, how On Ammonia Plant tail gas effectively processes and fully utilizes, and is that enterprise realizes cleaner production, the energy-saving and cost-reducing and key issue of increasing economic efficiency, and is also one of the primary goal of the enterprise governance three wastes, implement device qualified discharge.
Summary of the invention
The purpose of this utility model is to provide a kind ofly can effectively utilize synthetic ammonia tailgas, avoid the component in synthetic ammonia tailgas to waste and the lower synthetic ammonia tailgas comprehensive utilization device of energy consumption.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of synthetic ammonia tailgas comprehensive utilization device, for the treatment of the tail gas that synthetic ammonia process discharges, it comprises the cleaning system purified described tail gas, the ammonia recovery system tail gas described in after purification being liquefied to the gas after obtaining described product liquefied ammonia and described separation of ammonia, the gas after described separation of ammonia is carried out to the cleaning system again of deamination carbonization treatment, the gas after deamination decarburization is carried out to the distillation system of rectifying.
Preferably, described ammonia recovery system adopts non-power ammonia recovery device, and described ammonia recovery system connects promising its provides the gas expansion refrigeration system of institute's chilling requirement.
Preferably, described non-power ammonia recovery device comprise several by the recovery ammonia heat exchanger be in series successively after forward direction, be arranged at described in first, front recovery ammonia heat exchanger after dehydration rectifying column, be arranged at described in all the other recovery ammonia heat exchanger after gas-liquid separator; Described gas expansion refrigeration system comprises off-gas expander group, the gas vent of the gas-liquid separator described in of rearmost after described off-gas expander group again by before backward successively by the recovery ammonia heat exchanger described in each.
Preferably, described distillation system comprise be connected successively for obtain described product hydrogen hydrogen rectifying column, for obtain described product liquid methane methane rectifying column, for obtaining the argon gas rectifying column of described product liquid argon; Described cleaning system is again connected with described distillation system after multiple rectification heat exchanger of connecting successively; The tower top of described methane rectifying column is provided with methane rectifying column condenser, and the tower top of described argon gas rectifying column is provided with argon gas rectifying column condenser; Described methane rectifying column condenser and described argon gas rectifying column condenser are connected with the nitrogen compression cycle refrigeration system providing cold.
Preferably, described nitrogen compression cycle refrigeration system is connected with space division system, it comprises circulating nitrogen gas compressor, nitrogen expansion unit, and the nitrogen that described space division system exports provides cold respectively through described methane rectifying column condenser and described argon gas rectifying column condenser again after the expanding end of described circulating nitrogen gas compressor and described nitrogen expansion unit.
Preferably, the nitrogen described in the expanding end of described nitrogen expansion unit exports delivers to described methane rectifying column condenser and described argon gas rectifying column condenser more respectively after one or more described rectification heat exchanger.
Preferably, described cleaning system is for removing oil-cleaning system, and described cleaning system is again deamination decarburization absorber.
Because technique scheme is used, the utility model compared with prior art has following advantages: synthetic ammonia tailgas comprehensive utilization device of the present utility model can make full use of the various compositions in synthetic ammonia tailgas, accomplish comprehensively recyling of resource, and its consumed energy is lower, can steady in a long-termly run, improve efficiency, decrease waste.
Accompanying drawing explanation
Accompanying drawing 1 is the theory diagram of synthetic ammonia tailgas comprehensive utilization device of the present utility model.
Accompanying drawing 2 is the structural representation of synthetic ammonia tailgas comprehensive utilization device of the present utility model.
In above accompanying drawing: 1, cleaning system; 1-1, synthetic ammonia tailgas air inlet; 2, ammonia recovery system; 2-1, recovery ammonia heat exchanger; 2-2, dehydration rectifying column; 2-3, gas-liquid separator; 2-4, off-gas expander group; 2-5, rich ammoniacal liquor; 2-6, useless ammoniacal liquor; 3, cleaning system again; 3-1, regeneration gas import; 4, distillation system; 4-1, the first rectification heat exchanger; 4-2, the second rectification heat exchanger; 4-3, the 3rd rectification heat exchanger; 4-4, hydrogen rectifying column; 4-5, methane rectifying column; 4-6, argon gas rectifying column; 4-7, methane rectifying column condenser; 4-8, argon gas rectifying column condenser; 4-9, circulating nitrogen gas compressor; 4-10, nitrogen expansion unit; 4-11, hydrogen outlet; 4-12, liquid methane export; 4-13, liquid argon export; 4-14, regeneration gas; 4-15, nitrogen; 4-16, outlet port; 5-1, ammonia tank flashed vapour; 5-2, synthetic ammonia tower are dropped a hint; 5-3, liquid ammonia storage tank; 5-4, LNG storage tank; 5-5, liquid argon storage tank; 5-6, space division system.
Detailed description of the invention
Below in conjunction with embodiment shown in the drawings, the utility model is further described.
Embodiment one: embodiment one: the device that a kind of synthetic ammonia tailgas comprehensive utilization process of the tail gas discharged for the treatment of synthetic ammonia process adopts, as shown in Figures 1 and 2, it comprises cleaning system 1, ammonia recovery system 2, again cleaning system 3 and distillation system 4.To drop a hint 5-2 because synthetic ammonia tailgas may derive from ammonia tank flashed vapour 5-1 and synthetic ammonia tower, therefore, two cover cleaning systems 1 can be set, correspond respectively to above-mentioned two kinds of gases.
Cleaning system 1, for purifying tail gas, adopts in the present embodiment except oil-cleaning system 1, and tail gas was by except after oil-cleaning system 1, should removing objectionable impurities wherein.Cleaning system 1 has synthetic ammonia tailgas air inlet 1-1 and sweep gas air inlet, and it is de-oiling decarburization absorber.
Ammonia recovery system 2 for reclaiming ammonia composition from the tail gas after purification, and it adopts liquefaction mode to obtain the gas after product liquefied ammonia and separation of ammonia by the tail gas after purifying.This ammonia recovery system 2 adopts non-power ammonia recovery device, and it connects promising its provides the gas expansion refrigeration system of institute's chilling requirement.Concrete, non-power ammonia recovery device comprise several by the recovery ammonia heat exchanger be in series successively after forward direction, be arranged at dehydration rectifying column 2-2 after the recovery ammonia heat exchanger of first, front, be arranged at gas-liquid separator 2-3 after all the other recovery ammonia heat exchangers.Gas expansion refrigeration system comprises off-gas expander group 2-4, and the gas vent of a gas-liquid separator 2-3 of rearmost passes through each recovery ammonia heat exchanger successively again after off-gas expander group 2-4 before backward.In the present embodiment, adopt 3 recovery ammonia heat exchanger 2-1 and dehydration rectifying column 2-2 and two gas-liquid separator 2-3.Tail gas after purification is sent in first recovery ammonia heat exchanger 2-1, dehydration rectifying column 2-2, second recovery ammonia heat exchanger 2-1, first gas-liquid separator 2-3, the 3rd recovery ammonia heat exchanger 2-1, second gas-liquid separator 2-3 successively, thus obtain rich ammoniacal liquor 2-5(product liquefied ammonia by the liquid outlet of second gas-liquid separator 2-3), send in liquid ammonia storage tank 5-3, and obtain the gas after separation of ammonia by its gas vent, obtain useless ammoniacal liquor 2-6 at the bottom of the tower of dehydration rectifying column 2-2.Gas after this separation of ammonia provides cold to each recovery ammonia heat exchanger 2-1 again after off-gas expander group 2-4 swell refrigeration.This non-power ammonia recovery device utilizes the kinetic force of the synthetic ammonia tailgas of high pressure to carry out swell refrigeration, this portion of energy can be made full use of, reach the object producing low temperature cold, meet the cold supplementing the cold taken away of cryogenic liquid product and the cold damage of system and consume.In order to avoid " ice blocks up " problem appears in device, the liquid outlet of first gas-liquid separator 2-3 is connected to the eluent import of dehydration rectifying column 2-2, thus the liquefied ammonia making first gas-liquid separator 2-3 obtain becomes the eluent of dehydration rectifying column 2-2, in order to a small amount of water in wash-out tail gas, thus avoid water to build-up ice causing " ice blocks up ".
Cleaning system 3 is for carrying out deamination carbonization treatment to the gas after separation of ammonia again, and therefore it adopts deamination decarburization absorber, and the air inlet of this deamination decarburization absorber connects the gas after the separation of ammonia of recovery ammonia heat exchanger 2-1.It also has regeneration gas import 3-1.By the gas after the separation of ammonia of discharge after ammonia recovery system 2 still containing the ammonia seldom measured, because ammonia fusing point is higher, can freeze to block heat exchanger, so be introduced into deamination decarburization absorber by the carbon dioxide in the gas after separation of ammonia and a small amount of ammonia removal before entering low temperature distillation system 4 in the rectification heat exchanger of follow-up low temperature distillation system 4.Cleaning system 3 obtains deposed ammonia again, then carries out sewage disposal.
Cleaning system 3 is connected with distillation system 4 after multiple rectification heat exchanger of connecting successively again, adopts the first rectification heat exchanger 4-1, the second rectification heat exchanger 4-2 and the 3rd rectification heat exchanger 4-3 that connect successively in the present embodiment.Distillation system 4 for carrying out rectifying to the gas after deamination decarburization, thus obtains product hydrogen, product liquid methane and product liquid argon respectively.This distillation system 4 comprise be connected successively for obtain product hydrogen hydrogen rectifying column 4-4, for obtain product liquid methane methane rectifying column 4-5, for obtaining the argon gas rectifying column 4-6 of product liquid argon.The tower top of methane rectifying column 4-5 is provided with methane rectifying column condenser 4-7, and the tower top of argon gas rectifying column 4-6 is provided with argon gas rectifying column condenser 4-8.Methane rectifying column condenser 4-7 and argon gas rectifying column condenser 4-8 is connected with the nitrogen compression cycle refrigeration system providing cold.Nitrogen compression cycle refrigeration system is connected with space division system 5-6, it comprises circulating nitrogen gas compressor 4-9, nitrogen expansion unit 4-10, space division system 5-6 export nitrogen 4-15 after the expanding end of circulating nitrogen gas compressor 4-9 and nitrogen expansion unit 4-10 again after one or more rectification heat exchanger, deliver to methane rectifying column condenser 4-7 and argon gas rectifying column condenser 4-8 respectively, thus cold is provided.
The synthetic ammonia tailgas comprehensive utilization process that said apparatus adopts is: the tail gas liquefaction after purification is obtained the gas after product liquefied ammonia and separation of ammonia, and the gas after separation of ammonia is rectifying and obtain product hydrogen, product liquid methane and product liquid argon respectively again after deamination decarburization.
Concrete, synthetic ammonia tailgas enters cleaning system 1 and removes impurity, enter into ammonia recovery system 2 afterwards, this ammonia recovery system 2 adopts unpowered ammonia recovery method, the tail gas kinetic force utilizing synthetic tower to discharge, by recovery ammonia heat exchanger 2-1, dehydration rectifying column 2-2 and gas-liquid separator 2-3, dewatered, liquefy and isolate product liquefied ammonia by tail gas respectively, the cold used that liquefies carrys out the swell refrigeration of the gas after the separation of ammonia of high pressure.By also leaving the ammonia of seldom amount in tail gas after ammonia recovery system 2, because ammonia fusing point is higher, can freeze to block heat exchanger, so be introduced into again cleaning system 3 by the carbon dioxide in tail gas and a small amount of ammonia removal before entering low temperature distillation system 4 in the rectification heat exchanger of follow-up low temperature distillation system 4.Gas after separation of ammonia enters into low temperature distillation system 4 after purifying again, this distillation system 4 is provided with rectification heat exchanger, multiple rectifying column, decompressor etc., tail gas cools again at this distillation system 4, by hydrogen rectifying column 4-4, by Hydrogen Separation very low for boiling point out, this hydrogen purity higher than 90%, and by hydrogen outlet 4-11 transmitting system as syngas for synthetic ammonia.In tail gas afterwards, main component is methane, nitrogen and argon, it enters into methane rectifying column 4-5 extraction liquid methane again and delivers to LNG storage tank 5-4 through liquid methane outlet 4-12, enters into argon gas rectifying column 4-6 afterwards and extracts high-purity liquid argon through liquid argon outlet 4-13 feeding liquid argon storage tank 5-5.Cold needed for gas after rectifying separation of ammonia compresses circularly cooling by nitrogen to be provided, nitrogen 4-15 compresses laggard nitrogen expansion unit 4-10 through circulating nitrogen gas compressor 4-9, extract out before expanding end after a part enters the 3rd rectification heat exchanger 4-3 and send into methane rectifying column condenser 4-7 respectively, argon gas rectifying column condenser 4-8 provides cold, after discharged by outlet port 4-16.Through last tail gas only remaining a small amount of nitrogen of rectifying, it is incorporated into deamination decarburization absorber and is used as adsorbent reactivation regeneration gas 4-14 used.So far, in chemical industry tail gas, the ammonia of main component, methane, hydrogen and argon are obtained for effective extraction, and have also been used as the regeneration gas 4-14 of adsorbent reactivation for the low nitrogen of value, achieve comprehensive recovery and the utilization of synthetic ammonia tailgas.
Said apparatus and technique consider the value height of each component gas in chemical industry tail gas and extract complexity, component high to value in tail gas is respectively extracted, also partial liquefaction of purifying, and utilizes the equipment of advanced technological process and independent research to accomplish low-down energy consumption index.
The pressure energy of said apparatus and process makes full use synthetic ammonia tailgas and various exhaust gas constituents, accomplish the full use of resource.There is following characteristics:
1, adopt Technology for Powerless Recovery of Ammonia, make full use of the pressure energy of synthetic ammonia tailgas, be provided with decompressor, main purpose produces low temperature cold, for ammonia liquefaction process provides enough colds;
2, the moisture in the thorough wash-out synthetic ammonia tailgas of dewatering process energy in unpowered ammonia removal process, overcomes " ice blocks up " phenomenon in device During Process of Long-term Operation, thus ensure that the long-term stability of device is run, decrease waste, improve efficiency;
3, adopt multistage rectification mode, reclaim in waste gas except NH comprehensively
3other useful components in addition, as hydrogen, methane, argon gas, nitrogen, have accomplished making full use of of resource;
4, synthetic ammonia tailgas recovery can isolate a large amount of useless nitrogen, vague generalization factory directly will give up nitrogen discharge in air, this strand of nitrogen is incorporated into deamination decarbonization system and is used as adsorbent reactivation regeneration gas used by this device, has accomplished the effect turned waste into wealth, has saved cost.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (7)
1. a synthetic ammonia tailgas comprehensive utilization device, for the treatment of the tail gas that synthetic ammonia process discharges, it is characterized in that: it comprises the cleaning system purified described tail gas, the ammonia recovery system tail gas described in after purification being liquefied to the gas after obtaining described product liquefied ammonia and described separation of ammonia, the gas after described separation of ammonia is carried out to the cleaning system again of deamination carbonization treatment, the gas after deamination decarburization is carried out to the distillation system of rectifying.
2. synthetic ammonia tailgas comprehensive utilization device according to claim 1, is characterized in that: described ammonia recovery system adopts non-power ammonia recovery device, and described ammonia recovery system connects promising its provides the gas expansion refrigeration system of institute's chilling requirement.
3. synthetic ammonia tailgas comprehensive utilization device according to claim 2, is characterized in that: described non-power ammonia recovery device comprise several by the recovery ammonia heat exchanger be in series successively after forward direction, be arranged at described in first, front recovery ammonia heat exchanger after dehydration rectifying column, be arranged at described in all the other recovery ammonia heat exchanger after gas-liquid separator; Described gas expansion refrigeration system comprises off-gas expander group, the gas vent of the gas-liquid separator described in of rearmost after described off-gas expander group again by before backward successively by the recovery ammonia heat exchanger described in each.
4. the synthetic ammonia tailgas comprehensive utilization device according to claim 1 or 2 or 3, is characterized in that: described distillation system comprise be connected successively for obtain described product hydrogen hydrogen rectifying column, for obtain described product liquid methane methane rectifying column, for obtaining the argon gas rectifying column of described product liquid argon; Described cleaning system is again connected with described distillation system after multiple rectification heat exchanger of connecting successively; The tower top of described methane rectifying column is provided with methane rectifying column condenser, and the tower top of described argon gas rectifying column is provided with argon gas rectifying column condenser; Described methane rectifying column condenser and described argon gas rectifying column condenser are connected with the nitrogen compression cycle refrigeration system providing cold.
5. synthetic ammonia tailgas comprehensive utilization device according to claim 4, it is characterized in that: described nitrogen compression cycle refrigeration system is connected with space division system, it comprises circulating nitrogen gas compressor, nitrogen expansion unit, and the nitrogen that described space division system exports provides cold respectively through described methane rectifying column condenser and described argon gas rectifying column condenser again after the expanding end of described circulating nitrogen gas compressor and described nitrogen expansion unit.
6. synthetic ammonia tailgas comprehensive utilization device according to claim 5, is characterized in that: the nitrogen described in the expanding end of described nitrogen expansion unit exports delivers to described methane rectifying column condenser and described argon gas rectifying column condenser more respectively after one or more described rectification heat exchanger.
7. synthetic ammonia tailgas comprehensive utilization device according to claim 1, is characterized in that: described cleaning system is for removing oil-cleaning system, and described cleaning system is again deamination decarburization absorber.
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| CN201520528590.5U CN204987654U (en) | 2015-07-21 | 2015-07-21 | Device is used multipurposely to synthetic ammonia tail gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964515A (en) * | 2015-07-21 | 2015-10-07 | 苏州市兴鲁空分设备科技发展有限公司 | Comprehensive utilization technology and device for ammonia synthesis tail gas |
| CN106943837A (en) * | 2017-04-19 | 2017-07-14 | 苏州市兴鲁空分设备科技发展有限公司 | Decarburization deamination system |
| CN107445179A (en) * | 2017-07-28 | 2017-12-08 | 天脊煤化工集团股份有限公司 | The retracting device of periodic off-gases and flashed vapour in a kind of synthesis ammonia system |
| CN107894131A (en) * | 2016-10-03 | 2018-04-10 | 乔治洛德方法研究和开发液化空气有限公司 | The method and apparatus that argon gas is reclaimed in the device for separation of ammonia synthesis of detergent gas |
| CN108955086A (en) * | 2017-05-22 | 2018-12-07 | 乔治洛德方法研究和开发液化空气有限公司 | Device and method for purge gas mixture |
| CN112299444A (en) * | 2020-10-14 | 2021-02-02 | 营口正源电力配套设备有限公司 | Mobile liquid ammonia recovery ammonia tank replacement equipment and method |
-
2015
- 2015-07-21 CN CN201520528590.5U patent/CN204987654U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964515A (en) * | 2015-07-21 | 2015-10-07 | 苏州市兴鲁空分设备科技发展有限公司 | Comprehensive utilization technology and device for ammonia synthesis tail gas |
| CN107894131A (en) * | 2016-10-03 | 2018-04-10 | 乔治洛德方法研究和开发液化空气有限公司 | The method and apparatus that argon gas is reclaimed in the device for separation of ammonia synthesis of detergent gas |
| CN106943837A (en) * | 2017-04-19 | 2017-07-14 | 苏州市兴鲁空分设备科技发展有限公司 | Decarburization deamination system |
| CN108955086A (en) * | 2017-05-22 | 2018-12-07 | 乔治洛德方法研究和开发液化空气有限公司 | Device and method for purge gas mixture |
| CN108955086B (en) * | 2017-05-22 | 2022-07-05 | 乔治洛德方法研究和开发液化空气有限公司 | Device and method for purifying a gas mixture |
| CN107445179A (en) * | 2017-07-28 | 2017-12-08 | 天脊煤化工集团股份有限公司 | The retracting device of periodic off-gases and flashed vapour in a kind of synthesis ammonia system |
| CN112299444A (en) * | 2020-10-14 | 2021-02-02 | 营口正源电力配套设备有限公司 | Mobile liquid ammonia recovery ammonia tank replacement equipment and method |
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