CN203116432U - 外压缩空分设备液氧碳氢化合物排放系统 - Google Patents

外压缩空分设备液氧碳氢化合物排放系统 Download PDF

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CN203116432U
CN203116432U CN2013200658549U CN201320065854U CN203116432U CN 203116432 U CN203116432 U CN 203116432U CN 2013200658549 U CN2013200658549 U CN 2013200658549U CN 201320065854 U CN201320065854 U CN 201320065854U CN 203116432 U CN203116432 U CN 203116432U
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liquid oxygen
air separation
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oxygen
external compression
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刘代勇
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HENAN KAIYUAN AIR SEPARATION GROUP 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
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    • 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
    • F25J3/04—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 for air
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    • F25J3/04412—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 for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
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    • 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
    • F25J3/04—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 for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
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    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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    • 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
    • F25J3/04—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 for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
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    • 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
    • F25J3/04—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 for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04854—Safety aspects of operation
    • F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
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    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
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    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
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    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/30—External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
    • F25J2250/50—One fluid being 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
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Abstract

本实用新型属于深冷空气分离领域，具体涉及一种大型外压缩空分设备液氧碳氢化合物排放系统。本实用新型包括液氧泵和液氧回收设备，所述液氧泵的入口与外压缩空分设备冷箱内装有液氧的容器相连通，出口与液氧回收设备相连通。采用本实用新型系统，可以有效防止碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集，降低因碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集引起空分爆炸的风险。

Description

外压缩空分设备液氧碳氢化合物排放系统
技术领域
本实用新型属于深冷空气分离领域，具体涉及一种大型外压缩空分设备液氧碳氢化合物排放系统。
背景技术
空气中的有害杂质很多，对空分设备安全具有危险性的有害杂质主要包括：（1）堵塞组分：水、二氧化碳、一氧化二氮；（2）可燃组分：甲烷、乙炔、乙稀、乙烷等其他碳氢化合物；（3）腐蚀性气体组分：二氧化硫、三氧化硫、硫化氢等。在空气分离过程中，碳氢化合物会随着空气液化进入下塔液空中，随后又随着液空进入上塔，最后聚集在液氧中。碳氢化合物聚集在液氧中，容易引起装置爆炸，所以要对主冷凝蒸发器中碳氢化合物含量进行控制。
大型外压缩空分设备是指氧气产量大于一万标方每小时，出冷箱压力低于2公斤，用户用氧压力高于2公斤时，需要设置氧气压缩机将氧气进一步增压使用的空分设备。一般包括常规外压缩空分和氧气自增压空分两种。
目前防止碳氢化合物聚集的最重要的措施就是保持主冷凝蒸发器液氧连续排放，排放量等于大于1%氧气产量，习惯上称1%液氧排放。在常规外压缩空分流程中，加强主冷凝蒸发器液氧排放大致可以采用以下几种方法：一是设置液氧喷射蒸发器，1%液氧排放从主冷凝蒸发器排出后在液氧喷射蒸发器与出冷箱的低压氧气直接接触汽化作为产品一同送往用气点或氧压机；二是主冷凝蒸发器1%液氧排放直接排入残液蒸发器被蒸汽或压缩空气直接接触汽化并放散；三是主冷凝蒸发器1%液氧排放直接排入沙坑，靠自然蒸发排入大气；四是从主冷凝蒸发器抽取不少于1%氧产品的液氧作为液体产品送入贮槽。以上几种方法中，前三种适用液氧喷射蒸发器和残液蒸发器的方法多适用于中、小型空分装置，第四种抽取液体产品的多适用于大型及以上空分装置。在氧气自增压流程中，因主冷凝蒸发器中相当100%氧气产量的液氧需要排进液氧蒸发器（或称氧增压器），主冷凝蒸发器的液氧安全得以保障，碳氢化合物的聚集转移到液氧蒸发器内，所以氧气自增压流程的1%液氧排放是从液氧蒸发器中排出，一般按规模也可采用上述几种方法。
实用新型内容
本实用新型的目的在于提供一种大型外压缩空分设备液氧碳氢化合物排放系统，采用此系统，可以有效防止碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集，降低因碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集引起空分爆炸的风险。
本实用新型采用的技术方案为：
一种外压缩空分设备液氧碳氢化合物排放系统，包括液氧泵和液氧回收设备，所述液氧泵的入口与外压缩空分设备冷箱内装有液氧的容器相连通，出口与液氧回收设备相连通。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的外压缩空分设备氧气产品出冷箱压力≤0.2MPa，为常规外压缩空分或氧气自增压空分设备。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述常规外压缩空分设备冷箱内由下塔、主冷凝蒸发器、上塔、主换热器组成，出冷箱氧气压力≤0.05MPa；所述氧气自增压空分设备冷箱内由下塔、主冷凝蒸发器、上塔、主换热器和液氧蒸发器组成，出冷箱的氧气压力在0.05～0.2MPa。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述液氧泵为柱塞式或离心式，液氧泵出口压力0.3MPa-3.5MPa，通过液氧泵加压可将液氧送入液氧贮槽中或送入主换热器、液氧汽化器中汽化。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的装有液氧的容器为常规外压缩空分设备的主冷凝蒸发器或氧气自增压空分设备的液氧蒸发器。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的液氧回收设备为液氧贮槽或液氧换热器。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的液氧贮槽为真空粉末绝热贮槽或常压平底贮槽。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的液氧换热器为含有液氧通道的主换热器或液氧汽化器；液氧在主换热器或液氧汽化器的液氧通道中被正流空气加热汽化、复热至常温，可作为中压氧气并入氧气管网或节流并入低压管网。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的液氧汽化器由空气通道和液氧通道组成。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述的主换热器由液氧通道、空气通道、膨胀空气通道及氧气、氮气、污氮气中至少一种返流气通道组成。
根据上述的外压缩空分设备液氧碳氢化合物排放系统，所述液氧蒸发器为浴式蒸发器，由至少一台板翅式换热器与一个铝制密闭容器组成；液氧蒸发器工作时，板翅式换热器浸没在液氧中。板翅式换热器由液氧通道和空气通道组成，空气通道通过板翅换热器上的封头由接管引至密闭容器外，液氧通道不设进液及集气封头，浸泡在液氧中。来自主换热器的饱和空气在空气通道内被液氧冷凝成液体进入下塔，同时液氧被加热汽化进入主换热器中复热至常温作为产品气送出，密闭容器上有液氧排放及氧气出口等管路。
本实用新型的积极有益效果：
本实用新型一般适用于大型及以上空分装置，可以有效防止碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集，降低因碳氢化合物在主冷凝蒸发器或液氧蒸发器内聚集引起空分爆炸的风险。
采用本系统后对液氧产品有需求的用户可以在液氧贮槽内储存液氧，对无需求的用户可以在不提取液氧产品的情况下，将主冷凝蒸发器或液氧蒸发器内1%液氧安全排放在被液氧泵加压到一定压力送入换热器中被空气加热汽化，碳氢化合物与液氧一同汽化并复热至常温可作为产品送出，同时空气被液氧冷却，回收了液氧排放到喷射蒸发器或残液蒸发器时液氧带走的冷量，可以降低空分装置的能耗。
附图说明
图1为本实用新型应用于常规外压缩空分设备实施例一；
图2为本实用新型应用于常规外压缩空分设备实施例二；
图3为本实用新型应用于常规外压缩空分设备实施例三；
图4为本实用新型应用于氧气自增压空分设备实施例四；
图5为本实用新型应用于氧气自增压空分设备实施例五；
图6为本实用新型应用于氧气自增压空分设备实施例六；    
图中虚线框为空分设备冷箱， C1、下塔，C2、上塔，K1、主冷（主冷凝蒸发器），K2、液氧蒸发器，P1、液氧泵，SV、液氧贮槽，E1、主换热器，E2、液氧汽化器，GA、空气管路，LA、液空管路，LO、液氧管路，GO、氧气管路。
具体实施方式
下面结合具体实施例及附图对本实用新型进一步详细说明，但本实用新型不限于实施例。
实施例1
如图1所示，本实施例外压缩空分设备液氧碳氢化合物排放系统由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分设备冷箱、液氧泵P1和液氧贮槽SV组成，其中，冷箱内的下塔C1、主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1下部的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连，所述液氧泵P1入口连通于主冷凝蒸发器K1下部，出口通过设有控制阀的管线LO3与液氧贮槽SV相连通。本实施例液氧贮槽为真空粉末绝热贮槽或常压平底贮槽。
本实施例属于常规外压缩空分设备，主冷凝蒸发器K1中1%液氧排放经液氧泵P1加压经管线LO3送入低温液氧贮槽SV中。
实施例2
如图2所示，本实施外压缩空分设备液氧碳氢化合物排放系统，由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分冷箱、液氧泵P1和液氧汽化器E2组成，其中，冷箱内的下塔C1、主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1下部的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连，所述液氧泵P1入口连通于主冷凝蒸发器K1下部，所述液氧汽化器E2包含液氧通道和空气通道，所述液氧泵P1出口连通于液氧汽化器E2的液氧通道入口；液氧汽化器E2的空气通道由连通于主换热器E1与下塔C1之间的管道GA2。
本实施例属于常规外压缩空分设备，主冷凝蒸发器K1中1%液氧排放经液氧泵P1加压经管道LO3送入液氧汽化器E2中被空气加热汽化，碳氢化合物随液氧一同蒸发复热至常温作为产品送出冷箱。
实施例3
如图3所示，本实施外压缩空分设备液氧碳氢化合物排放系统，由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分冷箱和液氧泵P1组成，其中，冷箱内的下塔C1、主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连，所述液氧泵P1入口连通于主冷凝蒸发器K1下部，出口连通于主换热器E1的液氧通道人口。
本实施例属于常规外压缩空分设备，主冷凝蒸发器K1中1%液氧排放经液氧泵P1加压经管道LO3送入含液氧通道的主换热器E1中被空气加热汽化，碳氢化合物随液氧一同蒸发复热至常温作为产品送出冷箱。
实施例4
如图4所示，本实施外压缩空分设备液氧碳氢化合物排放系统，由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分设备冷箱、液氧泵P1、液氧贮槽SV和液氧蒸发器K2组成，其中，下塔C1、主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1下部的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连。所述液氧蒸发器K2分空气侧和氧侧，空气侧连接于主换热器E1与下塔C1之间的管线；氧侧顶部气相空间分别与主换热器和主冷凝蒸发器上部之间管线GO2连通，在该连通点与主冷凝蒸发器之间管线上设一个控制阀，氧侧液相空间顶部与主冷凝蒸发器K1的下部相通，液相空间底部与所述液氧泵P1入口连通，该液氧泵P1出口通过设有控制阀的管线LO3与液氧贮槽SV相连通。本实施例液氧贮槽为真空粉末绝热贮槽或常压平底贮槽。
本实施例属于氧气自增压空分设备，主冷凝蒸发器K1中液氧经管道LO1进入液氧蒸发器K2中，液氧蒸发器K2内1%液氧排放经液氧泵P1加压经管道LO3送入低温液氧贮槽SV中。
实施例5
如图5所示，本实施外压缩空分设备液氧碳氢化合物排放系统由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分设备冷箱、液氧泵P1、液氧汽化器E2和液氧蒸发器K2组成，其中，主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1下部的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连。所述液氧蒸发器K2分空气侧和氧侧，空气侧连接与主换热器E1与下塔C1之间；氧侧顶部气相空间分别与主换热器E1和主冷凝蒸发器K1上部之间管线连通，在该连通点与主冷凝蒸发器K1之间管线上设一个控制阀，氧侧液相空间顶部与主冷凝蒸发器K1的下部相通，液相空间底部与所述液氧泵P1入口连通，所述液氧汽化器E2包含液氧通道和空气通道，所述液氧泵P1出口连通与液氧汽化器E2的液氧通道入口；液氧汽化器E2的空气通道通过设有控制阀的管道连通于下塔C1下部。
本实施例属于氧气自增压空分设备，主冷凝蒸发器K1中液氧经管道LO1进入液氧蒸发器K2中，1%液氧排放经液氧泵P1加压经管道LO3送入液氧汽化器E2中经空气加热汽化，碳氢化合物随液氧一同蒸发复热至常温作为产品送出冷箱。
实施例6
如图6所示，本实施外压缩空分设备液氧碳氢化合物排放系统由主冷凝蒸发器K1、下塔C1、上塔C2、主换热器E1组成的空分设备冷箱、液氧泵P1和液氧蒸发器K2组成，其中，下塔C1、主冷凝蒸发器K1和上塔C2从下往上重叠布置，上塔C2中部通过设有控制阀的管线LA2连通下塔C1下端，主换热器E1下部的空气通道和氧气通道分别与下塔C1下部、主冷凝蒸发器K1上部相连。所述液氧蒸发器K2分空气侧和氧侧，空气侧连接与主换热器E1与下塔C1之间；氧侧顶部气相空间分别与主换热器E1和主冷凝蒸发器K1上部之间管线连通，在该连通点与主冷凝蒸发器K1之间管线上设一个控制阀，氧侧液相空间顶部与主冷凝蒸发器K1的下部相通，液相空间底部与所述液氧泵P1入口连通，液氧泵P1出口连通于主换热器E1的液氧通道入口。
本实施例属于氧气自增压空分设备，主冷凝蒸发器K1中液氧经管道LO1进入液氧蒸发器K2中，1%液氧排放经液氧泵P1加压经管道LO32送入主换热器E1中经空气加热汽化，碳氢化合物随液氧一同蒸发复热至常温作为产品送出冷箱。
以上所述仅为本实用新型示意性的具体实施方式，并非用以限定本实用新型的范围，任何本领域的技术人员在不脱离本实用新型构思和原则的前提下所做出的等同变化与修改，均应属于本实用新型保护的范围。

Claims (10)

1.一种外压缩空分设备液氧碳氢化合物排放系统，其特征在于：包括液氧泵和液氧回收设备，所述液氧泵的入口与外压缩空分设备冷箱内装有液氧的容器相连通，出口与液氧回收设备相连通。
2.根据权利要求1所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的外压缩空分设备氧气产品出冷箱压力≤0.2MPa，为常规外压缩空分或氧气自增压空分设备。
3.根据权利要求2所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述常规外压缩空分设备冷箱内由下塔、主冷凝蒸发器、上塔、主换热器组成，出冷箱氧气压力≤0.05MPa；所述氧气自增压空分设备冷箱内由下塔、主冷凝蒸发器、上塔、主换热器和液氧蒸发器组成，出冷箱的氧气压力在0.05～0.2MPa。
4.根据权利要求1所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述液氧泵为柱塞式或离心式，液氧泵出口压力0.3MPa-3.5MPa。
5.根据权利要求1所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的装有液氧的容器为常规外压缩空分设备的主冷凝蒸发器或氧气自增压空分设备的液氧蒸发器。
6.根据权利要求1所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的液氧回收设备为液氧贮槽或液氧换热器。
7.根据权利要求6所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的液氧贮槽为真空粉末绝热贮槽或常压平底贮槽。
8.根据权利要求6所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的液氧换热器为含有液氧通道的主换热器或液氧汽化器。
9.根据权利要求8所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的主换热器由液氧通道、空气通道、膨胀空气通道及氧气、氮气、污氮气中至少一种返流气通道组成。
10.根据权利要求8所述的外压缩空分设备液氧碳氢化合物排放系统，其特征在于：所述的液氧汽化器由空气通道和液氧通道组成。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642995A (zh) * 2016-12-30 2017-05-10 华北水利水电大学 一种可稀释碳氢化合物的外压缩空分系统
CN114440553A (zh) * 2022-02-18 2022-05-06 杭州制氧机集团股份有限公司 一种低能耗氮气膨胀制冷的双塔纯氮制取装置及使用方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642995A (zh) * 2016-12-30 2017-05-10 华北水利水电大学 一种可稀释碳氢化合物的外压缩空分系统
CN106642995B (zh) * 2016-12-30 2019-05-24 华北水利水电大学 一种可稀释碳氢化合物的外压缩空分系统
CN114440553A (zh) * 2022-02-18 2022-05-06 杭州制氧机集团股份有限公司 一种低能耗氮气膨胀制冷的双塔纯氮制取装置及使用方法

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