CN217210017U - 一种低温液体膨胀机再液化装置 - Google Patents

一种低温液体膨胀机再液化装置 Download PDF

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CN217210017U
CN217210017U CN202123355964.2U CN202123355964U CN217210017U CN 217210017 U CN217210017 U CN 217210017U CN 202123355964 U CN202123355964 U CN 202123355964U CN 217210017 U CN217210017 U CN 217210017U
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expander
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王海跃
王仁保
金志�
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Zhejiang Haichang 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
    • 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
    • F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
    • F25J3/04333—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams
    • F25J3/04339—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air
    • F25J3/04345—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams of air and comprising a gas work expansion 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
    • 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.
    • F25J3/04387—Details relating to the work expansion, e.g. process parameter etc. using liquid or hydraulic turbine 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
    • F25J3/04248—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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F25J2240/10—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream the fluid being air

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  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
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Abstract

本实用新型公开了一种低温液体膨胀机再液化装置，包括自洁式空气过滤器，所述自洁式空气过滤器的输出端连通有原料空气透平压缩机，所述原料空气透平压缩机的输出端分别连通有第一分子筛纯化器和第二分子筛纯化器，所述第一分子筛纯化器和第二分子筛纯化器采用并联的方式连接，所述第一分子筛纯化器和第二分子筛纯化器的输出端连通有循环空气压缩机，涉及低温液化技术领域，将空气节流过冷后进塔的节流阀替换成液体膨胀机，提高制冷效率，增加产能。

Description

一种低温液体膨胀机再液化装置
技术领域
本实用新型涉及低温液化技术领域，具体是一种低温液体膨胀机再液化装置。
背景技术
目前全液体空分流程为空气经空气过滤器被节流阀压缩并经冷却器冷却后分别在预冷系统和分子筛纯化器中预冷、净化，然后与高、低温膨胀后的循环空气经空气循环压缩机压缩，压缩后的空气分成两部分：一部分空气经主换热器冷却到一定温度后引入高温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱回到空气循环压缩机进口位置；另一部分经高温膨胀机和低温膨胀机的增压端增压后进入主换热器，冷却后分成两股，一股引入低温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱，回到空气循环压缩机进口位置，另一股继续冷却至一定含湿量经节流过冷后进入下塔，空气在双级精馏塔内精馏最终获得液体氧或氮产品，液体产品直接送往冷箱外的液体贮槽内储存，这样的方式通过节流阀往往出现制冷效率偏低，并且产能很少。
实用新型内容
本实用新型的目的在于提供一种低温液体膨胀机再液化装置，以解决上述背景技术中提出的问题。
为实现上述目的，本实用新型提供如下技术方案：
一种低温液体膨胀机再液化装置，包括自洁式空气过滤器，所述自洁式空气过滤器的输出端连通有原料空气透平压缩机，所述原料空气透平压缩机的输出端分别连通有第一分子筛纯化器和第二分子筛纯化器，所述第一分子筛纯化器和第二分子筛纯化器采用并联的方式连接，所述第一分子筛纯化器和第二分子筛纯化器的输出端连通有循环空气压缩机，所述循环空气压缩机的输出端连通有第一透平膨胀机，所述第一透平膨胀机的一侧设置有第一膨胀机增压端，所述第一透平膨胀机的输出端通过主换热器连通有第二透平膨胀机，所述第二透平膨胀机一侧设置有第二膨胀机增压端，第二膨胀机增压端和第一膨胀机增压端的输出端通过主换热器连通有液体膨胀机，所述液体膨胀机的一侧设置有制动风机。
作为本实用新型的进一步方案：所述液体膨胀机的输出端连通有下塔。
作为本实用新型的进一步方案：所述下塔内部中间设置有冷凝蒸发器，所述下塔的顶部设置有上塔。
作为本实用新型的进一步方案：所述下塔的一侧连通有过滤器，所述上塔的顶部和过滤器的一侧连通有液氮排出口。
作为本实用新型的进一步方案：还包括一种液化方法，具体步骤如下：
S1：空气经自洁式空气过滤器被原料空气透平压缩机压缩并经冷却器冷却
后分别在预冷系统和分子筛纯化器中预冷、净化；
S2：然后与高、低温膨胀后的循环空气经空气循环压缩机压缩，压缩后的空气分成两部分：一部分空气经主换热器冷却到一定温度后引入高温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱回到空气循环压缩机进口位置；
S3：另一部分经高温膨胀机和低温膨胀机的增压端增压后进入主换热器，冷却后分成两股，一股引入低温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱，回到空气循环压缩机进口位置，另一股继续冷却至一定含湿量经
液体膨胀机膨胀制冷后进入下塔；
S4：空气在双级精馏塔内精馏最终获得液体氧或氮产品，液体产品直接送往冷箱外的液体贮槽内储存。
与现有技术相比，本实用新型的有益效果为：将空气节流过冷后进塔的节流阀替换成液体膨胀机，提高制冷效率，增加产能。
附图说明
图1为一种低温液体膨胀机再液化装置的结构示意图。
图中：1、自洁式空气过滤器；2、原料空气透平压缩机；3、第二分子筛纯化器；4、循环空气压缩机；5、第一透平膨胀机；6、主换热器；7、第一膨胀机增压端；8、第二透平膨胀机；9、第二膨胀机增压端；10、液体膨胀机；11、制动风机；12、下塔；13、冷凝蒸发器；14、上塔；15、过滤器；16、第一分子筛纯化器。
具体实施方式
下面结合具体实施方式对本专利的技术方案作进一步详细地说明。
请参阅图1，一种低温液体膨胀机再液化装置，包括自洁式空气过滤器1，所述自洁式空气过滤器1的输出端连通有原料空气透平压缩机2，所述原料空气透平压缩机2的输出端分别连通有第一分子筛纯化器16和第二分子筛纯化器3，所述第一分子筛纯化器16和第二分子筛纯化器3采用并联的方式连接，所述第一分子筛纯化器16和第二分子筛纯化器3的输出端连通有循环空气压缩机4，所述循环空气压缩机4的输出端连通有第一透平膨胀机5，所述第一透平膨胀机5的一侧设置有第一膨胀机增压端7，所述第一透平膨胀机5的输出端通过主换热器6连通有第二透平膨胀机8，所述第二透平膨胀机8一侧设置有第二膨胀机增压端9，第二膨胀机增压端9和第一膨胀机增压端7的输出端通过主换热器6连通有液体膨胀机10，所述液体膨胀机10的一侧设置有制动风机11，所述液体膨胀机10的输出端连通有下塔12，所述下塔12内部中间设置有冷凝蒸发器13，所述下塔12的顶部设置有上塔14，所述下塔12的一侧连通有过滤器15，所述上塔14的顶部和过滤器15的一侧连通有液氮排出口还包括一种液化方法，具体步骤如下：
S1：空气经自洁式空气过滤器1被原料空气透平压缩机2压缩并经冷却器
冷却后分别在预冷系统和分子筛纯化器中预冷、净化；
S2：然后与高、低温膨胀后的循环空气经空气循环压缩机压缩，压缩后的空气分成两部分：一部分空气经主换热器冷却到一定温度后引入高温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱回到空气循环压缩机进口位置；
S3：另一部分经高温膨胀机和低温膨胀机的增压端增压后进入主换热器，冷却后分成两股，一股引入低温膨胀机膨胀制冷，膨胀后经主换热器复热出冷箱，回到空气循环压缩机进口位置，另一股继续冷却至一定含湿量经
液体膨胀机膨胀制冷后进入下塔；
S4：空气在双级精馏塔内精馏最终获得液体氧或氮产品，液体产品直接送往冷箱外的液体贮槽内储存。
在本实用新型的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本实用新型中的具体含义。
上面对本专利的较佳实施方式作了详细说明，但是本专利并不限于上述实施方式，在本领域的普通技术人员所具备的知识范围内，还可以在不脱离本专利宗旨的前提下作出各种变化。

Claims (4)

1.一种低温液体膨胀机再液化装置，包括自洁式空气过滤器(1)，其特征在于，所述自洁式空气过滤器(1)的输出端连通有原料空气透平压缩机(2)，所述原料空气透平压缩机(2)的输出端分别连通有第一分子筛纯化器(16)和第二分子筛纯化器(3)，所述第一分子筛纯化器(16)和第二分子筛纯化器(3)采用并联的方式连接，所述第一分子筛纯化器(16)和第二分子筛纯化器(3)的输出端连通有循环空气压缩机(4)，所述循环空气压缩机(4)的输出端连通有第一透平膨胀机(5)，所述第一透平膨胀机(5)的一侧设置有第一膨胀机增压端(7)，所述第一透平膨胀机(5)的输出端通过主换热器(6)连通有第二透平膨胀机(8)，所述第二透平膨胀机(8)一侧设置有第二膨胀机增压端(9)，第二膨胀机增压端(9)和第一膨胀机增压端(7)的输出端通过主换热器(6)连通有液体膨胀机(10)，所述液体膨胀机(10)的一侧设置有制动风机(11)。
2.根据权利要求1所述的一种低温液体膨胀机再液化装置，其特征在于，所述液体膨胀机(10)的输出端连通有下塔(12)。
3.根据权利要求2所述的一种低温液体膨胀机再液化装置，其特征在于，所述下塔(12)内部中间设置有冷凝蒸发器(13)，所述下塔(12)的顶部设置有上塔(14)。
4.根据权利要求3所述的一种低温液体膨胀机再液化装置，其特征在于，所述下塔(12)的一侧连通有过滤器(15)，所述上塔(14)的顶部和过滤器(15)的一侧连通有液氮排出口。
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