CN214406700U - 一种节能型自增压空分设备 - Google Patents

一种节能型自增压空分设备 Download PDF

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CN214406700U
CN214406700U CN202120191913.1U CN202120191913U CN214406700U CN 214406700 U CN214406700 U CN 214406700U CN 202120191913 U CN202120191913 U CN 202120191913U CN 214406700 U CN214406700 U CN 214406700U
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air
liquid oxygen
branch pipe
heat exchanger
liquid
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卢红太
王宏玉
蒋保见
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Kaifeng Dear Air Separation Industrial 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
    • F25J3/04—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
    • F25J3/04406—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
    • 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
    • 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
    • F25J3/04—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
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of air
    • 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
    • F25J3/04—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
    • 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
    • F25J3/04—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
    • F25J3/04103—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 using solely hydrostatic liquid head
    • 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
    • F25J3/04—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
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous 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
    • 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
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low pressure column
    • 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
    • F25J3/04—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
    • 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
    • F25J2250/40—One fluid being air
    • 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
    • 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

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Abstract

本实用新型涉及一种节能型自增压空分设备，包括供空分装置中的气体进行热交换的主换热器、主空气输送管道和精馏塔，精馏塔包括上塔和下塔,上塔底部设有主冷凝蒸发器,主冷凝蒸发器一侧的下方设有液氧蒸发器，液氧蒸发器和主冷凝蒸发器通过第一液氧输送管道相连通，液氧蒸发器的底部设有第二液氧输送管道，主空气输送管道上设有第一空气输送支管，液氧蒸发器下方的第一空气输送支管和第二液氧输送管道上设有第一辅助换热器，第一空气输送支管上设有第一空气增压泵，上塔和第一辅助换热器通过第四空气输送支管相连通，第四空气输送支管上设有透平膨胀机。降低了系统的能耗。本实用新型调节、使用方便，具有广泛的市场前景。

Description

一种节能型自增压空分设备
技术领域
本实用新型属于深冷空分技术领域，具体涉及一种节能型自增压空分设备。
背景技术
深度冷冻制氧空分装置工艺流程有外压缩流程和发展到现在流行趋势的内压缩空分流程，空分内压缩流程比空分外压缩流程运行生产更加安全可靠。内压缩流程比外压缩流程不同的是取消外压缩流程送出产品的氧气压缩机，而用低温液体泵将液体产品压缩到空分产品换热器蒸发气化后送至管网。
现有的工艺中，主空气管道中部分空气是经过增压膨胀后，在送入精馏塔进行精馏，空气在经过增压后其内能增加，现有的工艺中通常都是利用主换热器对增压后的气体进行降温然后在进入膨胀机进行膨胀降温，液氧在出液氧蒸发器后通常都是利用加热器对液氧进行加热后，液氧气化在对外部进行供应，利用单加热器对液氧进行加热能耗较高，不利于相应国家节能减排的政策，不利于推广。
发明内容
针对现有技术的不足，本实用新型提供一种能够利用增压后的气体对液氧进行预热的节能型自增压空分设备，用于克服现有技术中缺陷。
本实用新型采用的技术方案为：一种节能型自增压空分设备，包括供空分装置中的气体进行热交换的主换热器、主空气输送管道和精馏塔，所述的精馏塔包括上塔和下塔,所述的上塔底部设有主冷凝蒸发器,主冷凝蒸发器一侧的下方设置有液氧蒸发器，液氧蒸发器和主冷凝蒸发器通过第一液氧输送管道相连通，所述的液氧蒸发器的底部设置有第二液氧输送管道，主空气输送管道上设置有第一空气输送支管，液氧蒸发器下方的第一空气输送支管和第二液氧输送管道上设置有第一辅助换热器，第一空气输送支管上设置有第一空气增压泵，上塔和第一辅助换热器通过第四空气输送支管相连通，第四空气输送支管上设置有透平膨胀机。
优选的，所述的透平膨胀机和上塔之间的第四空气输送支管内设置有第一温度探头和气体流速传感器，第一空气输送支管上设置有第一截止阀。
优选的，所述的位于第一辅助换热器远离液氧蒸发器一侧的第二液氧输送管道上设置有第二辅助换热器，第二辅助换热器位于液氧蒸发器的下方，第二辅助换热器上设置有蒸汽输送管。
优选的，所述的下塔和液氧蒸发器之间以及液氧蒸发器和上塔之间均分别通过第一液空输送管相连通。
优选的，所述的上塔的顶部设置有污氮输送管，下塔的底部和上塔之间通过第二液空输送管相连通，主冷凝蒸发器和上塔之间通过第一液氮回流管相连通，第一液氮回流管和下塔之间通过第二液氮回流管相连通，第二液氮回流管上设置有回流截止阀，第一液氮回流管、污氮输送管以及第二液空输送管上设置有过冷器。
优选的，所述的主空气输送管道上设置有第二空气增压泵，主空气输送管道和液氧蒸发器之间通过第二空气输送支管相连通，第二空气输送支管上设置有第二截止阀，主空气输送管道和下塔之间通过第三空气输送支管相连通，第三空气输送支管上设置有第三截止阀。
优选的，所述的位于第二辅助换热器远离第一辅助换热器一侧的第二液氧输送管道内设置有第二电子温度探头。
本实用新型有益效果是：首先，本实用新型充分利用了系统内的热源，利用增压后的空气产生的热量和液氧在第一辅助换热器内换热，降低了液氧汽化所需要的能量，降低了能耗，同时稳定了膨胀降温后的空气的流速。
其次，本实用新型液氧蒸发器和第一辅助换热器之间的第二液氧输送管道上设置有液氧截止阀，结合位于第二辅助换热器远离第一辅助换热器一侧的第二液氧输送管道内设置有第二电子温度探头，通过液氧截止阀控制进入第一辅助换热器和第二辅助换热器进行换热的液氧量，并通过第二电子温度探头反馈的温度来获知液氧截止阀的开度是否合理。
最后，本产品可以通过控制第一截止阀、第二截止阀、第三截止阀和第一空气增压泵合理分配三部分进入所述的精馏塔的比例。
本实用新型具有结构简单，操作方便，设计巧妙，大大提高了工作效率，具有很好的社会和经济效益，是易于推广使用的产品。
附图说明
图1为本实用新型的结构示意图。
图2为图1细节A的局部放大示意图。
具体实施方式
如图1、2所示，一种节能型自增压空分设备，包括供空分装置中的气体进行热交换的主换热器1、主空气输送管道2和精馏塔，所述的精馏塔包括上塔3和下塔4,所述的上塔3底部设有主冷凝蒸发器5,主冷凝蒸发器5一侧的下方设置有液氧蒸发器7，液氧蒸发器7和主冷凝蒸发器5通过第一液氧输送管道6相连通，所述的液氧蒸发器7的底部设置有第二液氧输送管道8，主空气输送管道2上设置有第一空气输送支管9，液氧蒸发器7下方的第一空气输送支管9和第二液氧输送管道8上设置有第一辅助换热器10，第一空气输送支管9上设置有第一空气增压泵11，上塔3和第一辅助换热器10通过第四空气输送支管12相连通，第四空气输送支管12上设置有透平膨胀机13。液氧蒸发器7和第一辅助换热器10之间的第二液氧输送管道8上设置有液氧截止阀35，所述的透平膨胀机13和上塔3之间的第四空气输送支管12内设置有第一温度探头14和气体流速传感器34，第一空气输送支管9上设置有第一截止阀15。
所述的位于第一辅助换热器10远离液氧蒸发器7一侧的第二液氧输送管道8上设置有第二辅助换热器16，第二辅助换热器16位于液氧蒸发器7的下方，第二辅助换热器16上设置有蒸汽输送管17。
所述的下塔4和液氧蒸发器7之间以及液氧蒸发器7和上塔3之间均分别通过第一液空输送管18相连通。所述的上塔3的顶部设置有污氮输送管19，下塔4的底部和上塔3之间通过第二液空输送管20相连通，主冷凝蒸发器5和上塔3之间通过第一液氮回流管21相连通，上塔3上设置有成品氮气排放管33，第一液氮回流管21和下塔4之间通过第二液氮回流管22相连通，第二液氮回流管22上设置有回流截止阀23，成品氮气排放管33、第一液氮回流管21、污氮输送管19以及第二液空输送管20上设置有过冷器24。
所述的主空气输送管道2上设置有第二空气增压泵25，主空气输送管道2和液氧蒸发器7之间通过第二空气输送支管26相连通，第二空气输送支管26上设置有第二截止阀27，主空气输送管道2和下塔4之间通过第三空气输送支管28相连通，第三空气输送支管28上设置有第三截止阀29。
所述的位于第二辅助换热器16远离第一辅助换热器10一侧的第二液氧输送管道8内设置有第二电子温度探头30。本产品还设置有冷箱31，所述的精馏塔、主换热器1、液氧蒸发器7、透平膨胀机13、第一空气增压泵11、第一辅助换热器10和第二辅助换热器16均位于冷箱31内。所述的第二空气增压泵25位于冷箱31外侧。
本产品使用方法如下：如图1、2所示，主冷凝蒸发器5的液氧液面与液氧蒸发器7的液面的落差产生液氧自重压力。工作时，压缩、除杂后的空气经过主换热器1后分成空气A、空气B和空气C，所述的空气A经过第三空气输送支管28进入到下塔4，所述的空气B进入液氧蒸发器7，所述的空气C经过第一空气增压泵11增压通过第一辅助换热器10的换热后再进入第四空气输送支管12经过透平膨胀机13的降温后，进入上塔3。在下塔4中，空气被分离成氮气和富氧液空，上升气氮在主冷凝蒸发器5中液化成液氮，一部分液氮作为下塔4的回流液，另一部分液氮从下塔4顶部由液氮输出管路引出，进入第一液氮回流管21经过冷器24被污氮过冷后送入到上塔3作为回流；同时，主冷凝蒸发器5的低压侧液氧被汽化，主冷凝蒸发器5形成的液氧送入液氧蒸发器7，在液氧蒸发器7内被所述的空气B蒸发，蒸发后的氧气压力≥0.05MPa，在主换热器1内复热至常温后送出冷箱31，所述的空气B被液化形成液态空气A送入上塔3和下塔4，下塔4底部的液态空气B通过第二液空输送管20经过冷器24过冷后送入上塔3顶部作为回流。污氮从上塔3顶部引出在过冷器24中分别于所述的液态空气B和所述的液氮发生热交换，再经主换热器1换热后送出冷箱31外；产品气氮从上塔上部采出后进入成品氮气排放管33经过冷器24和主换热器1换热后送出冷箱31外。
与此同时，通过打开液氧截止阀35，利用液氧蒸发器7和第一辅助换热器10之间的高度差产生的重力，液氧蒸发器7底部的液氧进入到第一辅助换热器10和所述的空气C换热，所述的空气C被降温，液氧被汽化，然后在经过第二辅助换热器16被蒸汽输送管17内复热至常温后送出冷箱31。
通过实施例，通过本产品实现了充分利用了系统内的热源，并且依次经过第一辅助换热器10和第二辅助换热器16的换热避免了汽化后的氧气温度太低冻裂碳钢管线。另外需要说明的是本产品可以通过控制第一截止阀15、第二截止阀27、第三截止阀29和第一空气增压泵11合理分配所述的空气A、所述的空气B和所述的空气C之间的比例，同时可以通过液氧截止阀35控制进入第一辅助换热器10和第二辅助换热器16进行换热的液氧，并通过第二电子温度探头30反馈的温度来获知液氧截止阀35的开度是否合理。
本实用新型是满足于深冷空分技术领域工作者需要的一种节能型自增压空分设备，使得本实用新型具有广泛的市场前景。

Claims (7)

1.一种节能型自增压空分设备，包括供空分装置中的气体进行热交换的主换热器(1)、主空气输送管道(2)和精馏塔，所述的精馏塔包括上塔(3)和下塔(4),所述的上塔(3)底部设有主冷凝蒸发器(5),主冷凝蒸发器(5)一侧的下方设置有液氧蒸发器(7)，液氧蒸发器(7)和主冷凝蒸发器(5)通过第一液氧输送管道(6)相连通，其特征在于：所述的液氧蒸发器(7)的底部设置有第二液氧输送管道(8)，主空气输送管道(2)上设置有第一空气输送支管(9)，液氧蒸发器(7)下方的第一空气输送支管(9)和第二液氧输送管道(8)上设置有第一辅助换热器(10)，第一空气输送支管(9)上设置有第一空气增压泵(11)，上塔(3)和第一辅助换热器(10)通过第四空气输送支管(12)相连通，第四空气输送支管(12)上设置有透平膨胀机(13)。
2.根据权利要求1所述的节能型自增压空分设备，其特征在于：所述的透平膨胀机(13)和上塔(3)之间的第四空气输送支管(12)内设置有第一温度探头(14)和气体流速传感器(34)，第一空气输送支管(9)上设置有第一截止阀(15)。
3.根据权利要求1所述的节能型自增压空分设备，其特征在于：所述的位于第一辅助换热器(10)远离液氧蒸发器(7)一侧的第二液氧输送管道(8)上设置有第二辅助换热器(16)，第二辅助换热器(16)位于液氧蒸发器(7)的下方，第二辅助换热器(16)上设置有蒸汽输送管(17)。
4.根据权利要求1所述的节能型自增压空分设备，其特征在于：所述的下塔(4)和液氧蒸发器(7)之间以及液氧蒸发器(7)和上塔(3)之间均分别通过第一液空输送管(18)相连通。
5.根据权利要求1所述的节能型自增压空分设备，其特征在于：所述的上塔(3)的顶部设置有污氮输送管(19)，下塔(4)的底部和上塔(3)之间通过第二液空输送管(20)相连通，主冷凝蒸发器(5)和上塔(3)之间通过第一液氮回流管(21)相连通，第一液氮回流管(21)和下塔(4)之间通过第二液氮回流管(22)相连通，第二液氮回流管(22)上设置有回流截止阀(23)，第一液氮回流管(21)、污氮输送管(19)以及第二液空输送管(20)上设置有过冷器(24)。
6.根据权利要求2所述的节能型自增压空分设备，其特征在于：所述的主空气输送管道(2)上设置有第二空气增压泵(25)，主空气输送管道(2)和液氧蒸发器(7)之间通过第二空气输送支管(26)相连通，第二空气输送支管(26)上设置有第二截止阀(27)，主空气输送管道(2)和下塔(4)之间通过第三空气输送支管(28)相连通，第三空气输送支管(28)上设置有第三截止阀(29)。
7.根据权利要求3所述的节能型自增压空分设备，其特征在于：所述的位于第二辅助换热器(16)远离第一辅助换热器(10)一侧的第二液氧输送管道(8)内设置有第二电子温度探头(30)。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114459205A (zh) * 2022-02-22 2022-05-10 开封黄河空分集团有限公司 一种膨胀空气的冷却系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114459205A (zh) * 2022-02-22 2022-05-10 开封黄河空分集团有限公司 一种膨胀空气的冷却系统

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