CN201628446U - 低温液体汽化冷量回收系统 - Google Patents

低温液体汽化冷量回收系统 Download PDF

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CN201628446U
CN201628446U CN2010201569002U CN201020156900U CN201628446U CN 201628446 U CN201628446 U CN 201628446U CN 2010201569002 U CN2010201569002 U CN 2010201569002U CN 201020156900 U CN201020156900 U CN 201020156900U CN 201628446 U CN201628446 U CN 201628446U
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cryogenic liquid
heat exchanger
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赵云河
刘玉良
李宗辉
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JINAN BAODE GAS 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0221—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using the cold stored in an external cryogenic component in an open refrigeration 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • F25J1/0015—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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • F25J1/0017—Oxygen
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • F25J1/0037—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—Oxygen
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/20—Integrated compressor and process expander; Gear box arrangement; Multiple compressors on a common shaft
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of 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
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop
    • F25J2270/06—Internal refrigeration with work-producing gas expansion loop with multiple gas expansion loops

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Abstract

本实用新型涉及一种低温液体汽化冷量回收系统。它包括液化装置，所述液化装置与低温液体供给装置连接，汽化复热的气体与管网连接。它是将需要蒸发的液体引入液化装置对其蒸发过程中释放的冷量进行回收，增加液化装置的液化产量，避免了液体蒸发过程大量消耗蒸汽等能源介质，达到节能降耗的目的。

Description

低温液体汽化冷量回收系统
技术领域
本实用新型涉及一种用于新的低温液体汽化冷量回收系统。
背景技术
目前，低温液体蒸发方式一般采用蒸汽式汽化器或空浴式汽化器，其蒸发过程需要的热源由蒸汽或大气提供，这部分冷量不仅没有回收利用，还要消耗热量，不利于能源资源综合利用的低碳环保发展方向。
发明内容
为了克服液体蒸发过程中冷量无法回收利用的不足，本实用新型提供一种新的低温液体汽化冷量回收系统，该系统在全部回收利用液体蒸发过程中释放的冷量的同时，可以显著改善液化装置运行工况，提高液化装置液化量，达到能源资源综合利用的目的。
本实用新型解决其技术问题所采用的技术方案是：
一种低温液体汽化冷量回收系统，它包括液化装置，所述液化装置与低温液体供给装置连接，汽化复热的气体与管网连接。
所述液化装置包括板式换热器，循环气体依次通过低温增压透平膨胀机、冷却器II、高温增压透平膨胀机和冷却器I进入板式换热器，然后一路通过节流阀与气液分离器连接，气液分离器的气体送入循环气管网，液体送回贮槽；另一路经板式换热器上部送回高温增压透平膨胀机，然后再经板式换热器下部送入低温增压透平膨胀机，最后返回板式换热器。需要蒸发的低温液体送入液化装置中的板式换热器底部，进行逆向热交换，复热为气体后从板式换热器顶部出液化装置，送入管网。
所述低温液体供给装置为低温液体泵。
本实用新型低温液体复热所释放的冷量全部由需要液化的气体吸收，增加了液化装置的液体产量，同时避免了液体蒸发所需的蒸汽消耗，达到能源综合利用，节能降耗的目的。
本实用新型的有益效果是，液体汽化后的温度平均在常温以上，蒸汽和冷却水消耗减少为零。液化装置产量根据汽化和液化介质的不同有相应的提高。
附图说明
图1为现有液体蒸发方式流程示意图；
图2为本实用新型液体蒸发方式流程示意图。
其中，1.低温液体泵，2.液化装置冷箱，3.板式换热器，4.冷却器I，5.高温增压透平膨胀机，6.冷却器II，7.低温增压透平膨胀机，8.气液分离器，9.节流阀。
具体实施方式
下面结合附图对本实用新型进一步说明。
图1中，低温液体（液氧或液氮）经低温液体泵1加压后送入蒸汽式汽化器2，此前蒸汽式汽化器内需加满循环水，并通入蒸汽。为了保证液体在汽化器中完全汽化，必须保证汽化器内循环水的温度，但过高的温度又会使液体快速汽化，压力升高后阻止液体的进入，所以压力很难保持稳定。而且每蒸发5m3液体就要消耗0.1t蒸汽，还要保证循环水的流量，造成蒸发过程既不仅不节能还要消耗能源。
图2中，本实用新型中包括图1中的低温液体泵1，但不包括图1中的蒸汽式汽化器。低温液体（液氧或液氮）自低温液体泵1加压后送入正在运行的氧氮液化装置冷箱2中的板式换热器3底部，与需要液化的气体在进行逆向热交换，复热为气体后送入管网。运行中的液化装置将循环气经低温增压透平膨胀机7的增压机加压后进入冷却器II冷却，再进入高温增压透平膨胀机5的增压机加压后进入冷却器I冷却，后进入液化装置冷箱2的板式换热器3，一股从板式换热器3中部偏上位置抽出后进入高温增压透平膨胀机5膨胀后回到板式换热器3中换热，再进入低温增压透平膨胀机7膨胀后进入板式换热器3底部冷却板式，另一股从板式换热器3底部抽出经过高压节流阀9节流后产生液体，在气液分离器8中分离后，液体出冷箱进入贮槽，气体与低温增压透平膨胀机7膨胀后的气体一并回板式换热器3。需要蒸发的液体在板式换热器3中共同参与液化装置系统的热交换，复热所释放的冷量全部由需要液化的气体吸收，增加了液化装置的液体产量，同时避免了液体蒸发所需的蒸汽消耗，达到能源综合利用，节能降耗的目的。

Claims (3)

1.一种低温液体汽化冷量回收系统，它包括液化装置，其特征是，所述液化装置与低温液体供给装置连接，汽化复热的气体与管网连接。
2.如权利要求1所述的低温液体汽化冷量回收系统，其特征是，所述液化装置包括板式换热器，循环气体依次通过低温增压透平膨胀机、冷却器II、高温增压透平膨胀机和冷却器I进入板式换热器，然后一路通过节流阀与气液分离器连接，气液分离器的气体送入循环气管网，液体送回贮槽；另一路经板式换热器上部送回高温增压透平膨胀机，然后再经板式换热器下部送入低温增压透平膨胀机，最后返回板式换热器。
3.如权利要求1所述的低温液体汽化冷量回收系统，其特征是，所述低温液体供给装置为低温液体泵。
CN2010201569002U 2010-04-13 2010-04-13 低温液体汽化冷量回收系统 Expired - Fee Related CN201628446U (zh)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288085A (zh) * 2013-04-16 2013-09-11 杨中维 利用低温液体汽化冷能干冰发生器
CN106839648A (zh) * 2017-02-24 2017-06-13 杨皓 一种乙烯装置火炬气回收工艺
CN110094632A (zh) * 2019-05-17 2019-08-06 中国石油化工股份有限公司 一种低温冷量回收装置
EP3982071A3 (en) * 2020-10-09 2022-04-27 Air Liquide Societe Anonyme pour l'Etude et L'Exploitation des procedes Georges Claude Method and apparatus to convert excess liquid oxygen into liquid nitrogen
CN110094632B (zh) * 2019-05-17 2024-06-04 中国石油化工股份有限公司 一种低温冷量回收装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103288085A (zh) * 2013-04-16 2013-09-11 杨中维 利用低温液体汽化冷能干冰发生器
CN103288085B (zh) * 2013-04-16 2016-01-06 杨中维 利用低温液体汽化冷能干冰发生器
CN106839648A (zh) * 2017-02-24 2017-06-13 杨皓 一种乙烯装置火炬气回收工艺
CN110094632A (zh) * 2019-05-17 2019-08-06 中国石油化工股份有限公司 一种低温冷量回收装置
CN110094632B (zh) * 2019-05-17 2024-06-04 中国石油化工股份有限公司 一种低温冷量回收装置
EP3982071A3 (en) * 2020-10-09 2022-04-27 Air Liquide Societe Anonyme pour l'Etude et L'Exploitation des procedes Georges Claude Method and apparatus to convert excess liquid oxygen into liquid nitrogen

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