CN203529948U - Device for producing synthetic ammonia and co-producing LNG (Liquefied Natural Gas) through coke oven gas - Google Patents

Device for producing synthetic ammonia and co-producing LNG (Liquefied Natural Gas) through coke oven gas Download PDF

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Publication number
CN203529948U
CN203529948U CN201320721755.1U CN201320721755U CN203529948U CN 203529948 U CN203529948 U CN 203529948U CN 201320721755 U CN201320721755 U CN 201320721755U CN 203529948 U CN203529948 U CN 203529948U
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China
Prior art keywords
gas
branch line
synthetic
ammonia
unit
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CN201320721755.1U
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Chinese (zh)
Inventor
韩喜民
解交平
宋文戈
闫永兵
李战学
潘伟峰
娄军泽
陈胜林
王康平
王会串
吴冬果
陈芃娜
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山西阳煤丰喜肥业(集团)有限责任公司
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Priority to CN201320721755.1U priority Critical patent/CN203529948U/en
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Abstract

The utility model discloses a device for producing synthetic ammonia and co-producing LNG (Liquefied Natural Gas) through coke oven gas, which is high in utilization ratio of raw materials. The device comprises a coke oven gas purification unit, a synthetic ammonia unit, a feed coal gasification furnace and an air separation unit, wherein the outlet end of the feed coal gasification furnace and the tail end of the coke oven gas purification unit are respectively connected to the gas inlet end of a conversion device of the synthetic ammonia unit; a removing branch line is arranged on a two-in-one cold box device of the synthetic ammonia unit and is connected to the inlet end of the conversion device; a synthetic purge gas branch line connected to the two-in-one cold box device is arranged on an ammonia synthesizer. The device separates the purified coke oven gas, methane in semi-water gas and methane in purge gas produced in the process of producing the synthetic ammonia to produce LNG and has the advantages of short technological process and high utilization ratio of raw materials.

Description

A kind of coke(oven)gas is produced the device of synthetic ammonia coproducing LNG
Technical field
The utility model relates to processing method and the device of a kind of production natural gas liquids (liquefied natural gas) and synthetic ammonia, belongs to technical field of coal chemical industry.
Background technology
The feature of coke-oven gas self is that C/H is than low, it is desirable material gas, if realize the comprehensive utilization of coke-oven gas, coal, Jiao, change are realized integrated, not only the development of the energy and environment is combined, and traditional coking industry and chemical industry and chemical fertilizer industry are combined, this is to adjusting China's energy structure and chemical industry structure, develop coke-oven gas comprehensive utilization technique of new generation, have important practical significance.
At present, the approach of coke-oven gas comprehensive utilization mainly contains following several: utilize coke(oven)gas to produce synthetic ammonia, methyl alcohol, CNG, LNG, generating.Although these several approach technology maturations, all exist the shortcoming that unstripped gas utilization ratio is low, economic benefit does not reach best effect, thereby has restricted the continuation extension of this industrial chain.
In many coke-oven gas comprehensive utilization techniques nowadays, there is no a Technology that investment cost is low, technical process is short, unstripped gas utilization ratio is high, good in economic efficiency.
Summary of the invention
Technical problem to be solved in the utility model is to provide the device of the coke(oven)gas production synthetic ammonia coproducing LNG that a kind of raw material availability is high.
For solving above technical problem, the technical solution adopted in the utility model is:
Coke(oven)gas is produced a device of synthetic ammonia coproducing LNG, comprises coke oven gas purification unit, synthetic ammonia unit, feed coal vapourizing furnace and air separation facility,
Synthetic ammonia unit comprises changing device, low temperature washing device for methanol, two-in-one ice chest device, synthetic gas compression set and the ammonia synthesizer connecting in turn,
The oxygen output branch road of air separation facility connects feed coal vapourizing furnace, and the high pressure nitrogen output branch line of air separation unit and liquid nitrogen output branch road are connected to two-in-one ice chest device,
The exit end of feed coal steam stove and coke oven gas purification cell end are connected to respectively the gas inlet end of changing device,
Two-in-one ice chest device be provided with and remove branch line, drop a hint branch line and LNG branch line, remove the inlet end that branch line is connected to changing device,
Ammonia synthesizer is provided with the synthetic branch line of exitting of speeding that is connected to the circulation gas branch line of synthetic gas compression set and is connected to two-in-one ice chest device.
The utility model be by semi-water gas with purify after coke-oven gas enter converter unit after mixing, entering subsequently low-temperature rectisol purification unit processes, purified gas after purifying treatment enters in the two-in-one ice chest being comprised of liquid nitrogen washing device and cryogenic unit, purified gas further purifies in two-in-one ice chest, is finally configured to H 2/ N 3the pure synthetic gas of=3:1, pure synthetic gas enters synthetic ammonia unit and produces synthetic ammonia, and the venting of speeding that synthetic ammonia unit produces is returned to two-in-one ice chest device and is produced LNG product.
As preferred scheme, described coke oven gas purification unit comprises hydrogenation and the mercury removal device of the gas holder, electrically trapped tar oil device, ammonia removal device, coke(oven)gas gas holder, compression set I, Temp .-changing adsorption device, compression set II and the end that connect in turn.
The utility model is by the coke-oven gas after purifying and the methane in semi-water gas and produces the methane separation that in synthetic ammonia process, generation is speeded in venting and out produce LNG, recycles residue available gas and produce synthetic ammonia.By the comprehensive utilization to coke-oven gas, not only the effective gas in coke-oven gas is all utilized, also the venting of speeding producing in production of synthetic ammonia is recycled, have advantages of that technical process is short, unstripped gas utilization ratio is high.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
In figure, 1-feed coal gasification unit, 2-air separation unit, 3-gas holder, 4-electrically trapped tar oil device, 5-ammonia removal device, 6-coke(oven)gas gas holder, 7-compression set I, 8-becomes wet adsorption unit, 9-compression set II, 10-hydrogenation and mercury removal device, 11-changing device, 12-low temperature washing device for methanol, the two-in-one ice chest device of 13-, 14-synthetic gas compression set, 15-ammonia synthesizer, 16-oxygen output branch road, 17-high pressure nitrogen output branch line, 18-liquid nitrogen output branch road, 19-removes branch line, the 20-branch line of dropping a hint, 21-LNG branch line, 22-circulation gas branch line, the synthetic branch line of exitting of speeding of 23-.
Embodiment
In order to make those skilled in the art better understand the utility model, below in conjunction with accompanying drawing, the utility model is done to further clear, complete explanation.
As shown in Figure 1, the device that a kind of coke(oven)gas described in the utility model is produced synthetic ammonia coproducing LNG comprises coke oven gas purification unit, synthetic ammonia unit, feed coal vapourizing furnace 1 and air separation facility 2.
Described coke oven gas purification unit comprises hydrogenation and the mercury removal device 10 of the gas holder 3, electrically trapped tar oil device 4, ammonia removal device 5, coke(oven)gas gas holder 6, compression set I7, Temp .-changing adsorption device 8, compression set II9 and the end that connect in turn.The coke-oven gas of coke-oven plant's rough purification, after electrically trapped tar oil device 4 is removed tar and dust wherein, is delivered to ammonia removal device 5 except ammonia.Except entering coke(oven)gas gas holder 6, coke(oven)gas after ammonia cushions, then enter coke(oven)gas screw compression device I7 pressure-raising and remove naphthalene, benzene and a small amount of impurity wherein to entering Temp .-changing adsorption device 8 after 0.7Mpa, then enter and after the reciprocal compression set II9 of coke(oven)gas boosts, enter hydrogenation and mercury removal device 10 carries out hydrocracking, by organosulfur be wherein converted into inorganic sulfur, unsaturated hydrocarbons is converted into stable hydrocarbon.
Synthetic ammonia unit comprises changing device 11, low temperature washing device for methanol 12, two-in-one ice chest device 13, synthetic gas compression set 14 and the ammonia synthesizer 15 connecting in turn,
Two-in-one ice chest device is that liquid nitrogen washing device and cryogenic unit are combined to the device putting together, it provides cold by liquid nitrogen and mix refrigerant (MRC) two media, both met and entered the requirement of the front process gas purification of synthetic ammonia installation and the requirement of producing LNG, reduced largely product energy consumption and plant investment simultaneously.
The oxygen output branch road 16 of air separation facility connects feed coal vapourizing furnace 1, the high pressure nitrogen output branch line 17 of air separation unit and liquid nitrogen output branch road 18 are connected to two-in-one ice chest device 13, the oxygen output branch road 16 of air separation facility provides oxygen for feed coal vapourizing furnace, and high pressure nitrogen output branch line 17 and liquid nitrogen output branch road 18 provide high pressure nitrogen and liquid nitrogen in two-in-one ice chest device.
The hydrogenation of the exit end of feed coal vapourizing furnace 1 and coke oven gas purification cell end and mercury removal device 10 are connected to respectively the gas inlet end of changing device 11, 1 pair of feed coal of feed coal vapourizing furnace gasifies, the semi-water gas producing is as a part of unstripped gas, unstripped gas enters changing device 11 after carrying out washing treatment with after coke(oven)gas from coke oven gas purification unit mixes, enter subsequently low temperature washing device for methanol 12 and carry out desulfurization decarbonization purification processing, purified gas after purifying treatment enters two-in-one ice chest device 13, this device effectively, reasonably liquid nitrogen washing device and cryogenic unit are united two into one.Purified gas further purifies in two-in-one ice chest device 13, removes CO, CH wherein 4, Ar etc., be finally configured to H 2/ N 3the pure synthetic gas of=3:1, enters subsequently synthetic ammonia unit and produces synthetic ammonia.
Two-in-one ice chest device 13 be provided with and remove branch line 19, drop a hint branch line 20 and LNG branch line 21, remove the inlet end that branch line 19 is connected to changing device 11, through the isolated methane-rich liquid of two-in-one ice chest device 13, after rectifying tower separation, obtain LNG, deliver to LNG irrigated area outside battery limit (BL), the H removing in two-in-one ice chest device 2, CO, CH 4, N 2, Ar gets back to again changing device 11 through removing branch line.
Ammonia synthesizer 15 is provided with the synthetic branch line 23 of speeding to exit that is connected to the circulation gas branch line 22 of synthetic gas compression set 14 and is connected to two-in-one ice chest device 12.Synthetic ammonia installation 15 generations are speeded to exit and are entered further utilization production LNG product of two-in-one ice chest device 13 by the synthetic branch line 23 of speeding to exit.
The claimed scope of the utility model is not limited to above embodiment; to those skilled in the art; the utility model can have various deformation and change, all any modifications of doing within design of the present utility model and principle, improves and is equal within replacement all should be included in protection domain of the present utility model.

Claims (2)

1. coke(oven)gas is produced a device of synthetic ammonia coproducing LNG, it is characterized in that: comprise coke oven gas purification unit, synthetic ammonia unit, feed coal vapourizing furnace (1) and air separation facility (2),
Synthetic ammonia unit comprises changing device (11), low temperature washing device for methanol (12), two-in-one ice chest device (13), synthetic gas compression set (14) and the ammonia synthesizer (15) connecting in turn,
The oxygen output branch road (16) of air separation facility connects feed coal vapourizing furnace (1), and high pressure nitrogen output branch line (17) and the liquid nitrogen output branch road (18) of air separation unit are connected to two-in-one ice chest device (13),
The exit end of feed coal steam stove (1) and coke oven gas purification cell end are connected to respectively the gas inlet end of changing device (11),
Two-in-one ice chest device (13) is provided with and removes branch line (19), the branch line of dropping a hint (20) and LNG branch line (21), removes the inlet end that branch line (19) is connected to changing device (11),
Ammonia synthesizer (15) is provided with the synthetic branch line (23) of speeding to exit that is connected to the circulation gas branch line (22) of synthetic gas compression set (14) and is connected to two-in-one ice chest device (12).
2. device according to claim 1, is characterized in that: described coke oven gas purification unit comprises hydrogenation and the mercury removal device (10) of the gas holder (3), electrically trapped tar oil device (4), ammonia removal device (5), coke(oven)gas gas holder (6), compression set I (7), Temp .-changing adsorption device (8), compression set II (9) and the end that connect in turn.
CN201320721755.1U 2013-11-16 2013-11-16 Device for producing synthetic ammonia and co-producing LNG (Liquefied Natural Gas) through coke oven gas CN203529948U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103588221A (en) * 2013-11-16 2014-02-19 山西阳煤丰喜肥业(集团)有限责任公司 Method and device for co-production of synthetic ammonia and LNC (liquefied natural gas) by coke gas
CN104031690A (en) * 2014-05-30 2014-09-10 石家庄德正环保科技有限公司 Screw and multistage centrifugal unit compression gas delivery system
CN105110291A (en) * 2015-07-21 2015-12-02 河南环宇石化装备科技股份有限公司 Method for preparation of LNG from recovered coke oven gas and co-production of synthetic ammonia

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103588221A (en) * 2013-11-16 2014-02-19 山西阳煤丰喜肥业(集团)有限责任公司 Method and device for co-production of synthetic ammonia and LNC (liquefied natural gas) by coke gas
CN103588221B (en) * 2013-11-16 2016-03-02 山西阳煤丰喜肥业(集团)有限责任公司 A kind of coke(oven)gas produces method and the device of synthetic ammonia coproducing LNG
CN104031690A (en) * 2014-05-30 2014-09-10 石家庄德正环保科技有限公司 Screw and multistage centrifugal unit compression gas delivery system
CN105110291A (en) * 2015-07-21 2015-12-02 河南环宇石化装备科技股份有限公司 Method for preparation of LNG from recovered coke oven gas and co-production of synthetic ammonia

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Granted publication date: 20140409

Termination date: 20191116