CN220524475U - 一种利用气体轴承膨胀机的制氮设备 - Google Patents

一种利用气体轴承膨胀机的制氮设备 Download PDF

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CN220524475U
CN220524475U CN202321823943.5U CN202321823943U CN220524475U CN 220524475 U CN220524475 U CN 220524475U CN 202321823943 U CN202321823943 U CN 202321823943U CN 220524475 U CN220524475 U CN 220524475U
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heat exchanger
plate type
type heat
nitrogen
auxiliary plate
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张立峰
张金明
许凯旋
韦映
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Zhejiang Jinhua Air Separation Equipment 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
    • F25J3/04248—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
    • 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
    • F25J3/0423—Subcooling of liquid process streams
    • 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
    • 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
    • F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
    • 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
    • F25J3/044—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 single pressure main column system only
    • 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
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
    • 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
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/0489—Modularity and arrangement of parts of the air fractionation unit, in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
    • 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
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum

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Abstract

本实用新型涉及制氮设备相关技术领域，特别涉及一种利用气体轴承膨胀机的制氮设备，包括外立架，所述外立架上固定安装有换热装置，所述换热装置包括主板式换热器和副板式换热器，所述主板式换热器和所述副板式换热器连通，所述副板式换热器固定连接有用于制冷的正流透平膨胀机，所述副板式换热器连接有用于蒸馏的下塔；本实用新型通过主板式的换热器和副板式换热器进行控制进入的空气分流，进行加热和制冷工作，实现对氮气和空气的分离，实现氮气的生产，进行该实用新型设备不仅对进塔空气进行正流膨胀制冷，还对出塔的污氮气进行返流膨胀制冷，回收返流冷量，降低能耗，提高氮气的提取率。

Description

一种利用气体轴承膨胀机的制氮设备
技术领域
本实用新型涉及制氮设备相关技术领域，特别涉及一种利用气体轴承膨胀机的制氮设备。
背景技术
空气分离制液氮技术在中国的发展始于20世纪50年代，现在常规的制液氮工艺采用低温吸附分离、低温膨胀工艺、带有回热的涡轮膨胀工艺，主要是将氮气经过多级压缩和冷却后，通过吸附分离装置进行吸附分离，得到高纯度氮气，然后将氮气通过膨胀阀进行膨胀和冷却，最终冷凝成液态氮。但是目前的流程较复杂，生产成本和能耗都较高，且提取率低。
实用新型内容
本实用新型的目的是提供一种利用气体轴承膨胀机的制氮设备，解决上述问题。
本实用新型的上述技术目的是通过以下技术方案得以实现的：一种利用气体轴承膨胀机的制氮设备，包括外立架，所述外立架上固定安装有换热装置，所述换热装置包括主板式换热器和副板式换热器，所述主板式换热器和所述副板式换热器连通，所述副板式换热器固定连接有用于制冷的正流透平膨胀机，所述副板式换热器连接有用于蒸馏的下塔。
有益效果：通过主板式的换热器和副板式换热器进行控制进入的空气分流，进行加热和制冷工作，实现对氮气和空气的分离，实现氮气的生产，进行该实用新型设备不仅对进塔空气进行正流膨胀制冷，还对出塔的污氮气进行返流膨胀制冷，回收返流冷量，降低能耗，提高氮气的提取率。
进一步，所述副板式换热器连接有两个排气管道，一个所述排气管道伸出所述外立架，另一个所述排气管道和所述正流透平膨胀机连通。
进一步，所述下塔的上端连接有主冷凝蒸发器。
进一步，所述下塔的下侧连接有过冷器，所述过冷器连接有液氮量筒。
进一步，所述主冷凝蒸发器和所述过冷器连通。
进一步，所述主冷凝蒸发器和所述主板式换热器连通。
进一步，所述主板式换热器上固定连接有返流透平膨胀机，所述返流透平膨胀机和所述换热装置连通。
附图说明
图1为本实用新型一实施例的整体结构示意图；
图2为本实用新型一实施例的正视结构示意图；
图3为本实用新型一实施例的侧视结构示意图。
附图标记:1、主板式换热器；2、副板式换热器；3、正流透平膨胀机；4、反流透平膨胀机；5、节流阀；6、过冷器；7、下塔；8、主冷凝蒸发器；9、液氮量筒。
具体实施方式
以下所述仅是本实用新型的优选实施方式，保护范围并不仅局限于该实施例，凡属于本实用新型思路下的技术方案应当属于本实用新型的保护范围。同时应当指出，对于本技术领域的普通技术人员而言，在不脱离本实用新型原理前提下的若干改进和润饰，这些改进和润饰也应视为本实用新型的保护范围。
见图1至图3所示,
本装置包括外立架，整体结构主要安装于外立架内，外立架外部包裹密封，形成箱体，空气经过净化处理后进入装置内部，所述外立架上固定安装有换热装置，所述换热装置包括主板式换热器1和副板式换热器2，所述主板式换热器1和所述副板式换热器2连通，空气会先经过1主板式换热器和2副板式换热器换热后，在2副板式换热器内，空气被分为两股，进行分流处理。
所述副板式换热器2固定连接有用于制冷的正流透平膨胀机3，所述主板式换热器1上固定连接有返流透平膨胀机4，一股空气从副板式换热器2中部抽去正流透平膨胀机膨胀制冷3，膨胀后的气体全部返回副板式换热器2底部进行复热，再和主板式换热器换热1，之后直接出冷箱去放空。
所述副板式换热器2连接有用于蒸馏的下塔7，另一股从2副板式换热器底部抽出后，送入下塔7参与精馏，在本实施例中，下塔7选用的是铝制筛板精馏塔。
在下塔7内精馏后，空气被分离成氮气和富氧液空，氮气和液空分流排出。
所述下塔7的上端固定连接有主冷凝蒸发器8，所述下塔7顶部引出高纯度的氮气进入主冷凝蒸发器8高压侧冷凝成液氮，液氮分流进行处理。
所述下塔7的下侧连接有过冷器6，所述过冷器6连接有液氮量筒9，一部分液氮作为下塔7回流液，一部分液氮经过过冷器6与富氧液空换热，再进入9液氮量筒，液氮在9液氮量筒可作产品送出。
从下塔7底部引出富氧液空，经过6过冷器被液氮冷却后，再通过节流阀5节流，之后送入主冷凝蒸发器8，低压侧液氮被汽化，在主冷凝蒸发器8顶部得到污氮气，污氮气在主板式换热器1换热后，进入返流透平膨胀机4膨胀制冷，回收返流气冷量，然后再经过主板式换热器1和副板式换热器2复热后送出冷箱外。
最后应说明的是：以上所述仅为本实用新型的优选实施例而已，并不用于限制本实用新型，尽管参照前述实施例对本实用新型进行了详细的说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换,凡在本实用新型的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。

Claims (6)

1.一种利用气体轴承膨胀机的制氮设备，包括外立架，其特征在于：所述外立架上固定安装有换热装置，所述换热装置包括主板式换热器(1)和副板式换热器(2)，所述主板式换热器(1)和所述副板式换热器(2)连通，所述副板式换热器(2)固定连接有用于制冷的正流透平膨胀机(3)，所述副板式换热器(2)连接有用于蒸馏的下塔(7)；所述主板式换热器(1)上固定连接有返流透平膨胀机(4)，所述返流透平膨胀机(4)和所述主板式换热器(1)以及所述副板式换热器(2)均连通。
2.根据权利要求1所述的一种利用气体轴承膨胀机的制氮设备，其特征在于：所述副板式换热器(2)连接有两个排气管道，一个所述排气管道伸出所述外立架(10)，另一个所述排气管道和所述正流透平膨胀机(3)连通。
3.根据权利要求1所述的一种利用气体轴承膨胀机的制氮设备，其特征在于：所述下塔(7)的上端连接有主冷凝蒸发器(8)。
4.根据权利要求3所述的一种利用气体轴承膨胀机的制氮设备，其特征在于：所述下塔(7)的下侧连接有过冷器(6)，所述过冷器(6)连接有液氮量筒(9)。
5.根据权利要求4所述的一种利用气体轴承膨胀机的制氮设备，其特征在于：所述主冷凝蒸发器(8)和所述过冷器(6)连通。
6.根据权利要求3所述的一种利用气体轴承膨胀机的制氮设备，其特征在于：所述主冷凝蒸发器(8)和所述主板式换热器(1)连通。
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