CN213578366U - 一种双套空分装置液氧输送泵失效保护装置 - Google Patents

一种双套空分装置液氧输送泵失效保护装置 Download PDF

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CN213578366U
CN213578366U CN202022443443.1U CN202022443443U CN213578366U CN 213578366 U CN213578366 U CN 213578366U CN 202022443443 U CN202022443443 U CN 202022443443U CN 213578366 U CN213578366 U CN 213578366U
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liquid oxygen
air separation
delivery pump
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由迪
韩立峰
郭媛
孙彬
吴文英
薛凤杰
付定君
张丽娇
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Yingde Gas Engineering Zhejiang 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
    • F25J3/04763—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
    • F25J3/04812—Different modes, i.e. "runs" of operation
    • F25J3/04824—Stopping of the process, e.g. defrosting or deriming; Back-up procedures
    • 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
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04963—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipment within or downstream of the fractionation unit(s)
    • 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
    • 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
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream 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
    • F25J2290/62—Details of storing a fluid in a tank

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)

Abstract

一种双套空分装置液氧输送泵失效保护装置，它包括相互连接的精馏塔、过冷器、液氧储槽、液氧输送泵、换热器、水浴式汽化器组成，所述精馏塔由上下排布的两个空分A精馏塔和空分B精馏塔组成，后方分别连接空分A过冷器和空分B过冷器，本实用新型与常规双套空分后备输送流程相比，减少了两台从精馏塔出口去氧气管网的液氧流程泵，具有节约成本的作用。

Description

一种双套空分装置液氧输送泵失效保护装置
技术领域
本实用新型属于空气分离行业应用领域，尤其涉及一种双套空分装置液氧输送泵失效保护装置。
背景技术
目前双套空气分离装置供气系统主要流程是这样的，从各自精馏塔产出的液氧分成两路，一路经由各自液氧流程泵去各自换热器换热成氧气进入管网给用户供气，一路去各自过冷器进同一储槽，在空分装置停车的情况下由液氧输送泵送至水浴式汽化器将液氧气化成氧气供给化工厂，保证持续供气。所以双套空分供气系统需要双倍数量的液氧流程泵、液氧输送泵及配套系统，不利于成本控制。而且由于设备的增多，增加了多个故障点，若出现液氧输送泵失效的情况下，用户供气就会中断，对现场的安全维护和供气量损失都是得不偿失的。
发明内容
为了解决因后备输送泵失效或故障导致空分装置不能持续稳定供气的问题，本实用新型提供了一种可以在泵失效的情况下持续稳定供气的方法，避免了因液氧输送泵失效导致供气中断而引起经济损失的情况。
本实用新型解决液氧输送泵失效所采用的设计方法是：一种双套空分装置液氧输送泵失效保护装置，它包括相互连接的精馏塔、过冷器、液氧储槽、液氧输送泵、换热器、水浴式汽化器组成，所述精馏塔由上下排布的两个空分A精馏塔和空分B精馏塔组成，后方分别连接空分A过冷器和空分B过冷器，所述空分A过冷器和空分B过冷器分别汇总后与后方的液氧储罐相连接，其中液氧储罐后方设有三条通道，分别连接液氧输送泵Ⅰ，液氧输送泵Ⅱ，液氧输送泵Ⅲ，每个液氧输送泵均设有想对应的第一回流阀、第二回流阀、第三回流阀，所述在液氧输送泵Ⅰ，液氧输送泵Ⅱ，液氧输送泵Ⅲ后方通过管道分别与第一调节阀、第二调节阀、第三调节阀相连，并且分别通过管道与后方的第一换热器、水浴式汽化器、第二换热器连接，所述第一换热器后方还设有第一调节阀，第二换热器后方设有第二调节阀，所述第一调节阀、第二调节阀、第三调节阀、第一回流阀、第二回流阀、第三回流阀均由DCS逻辑控制。
本实用新型的有益效果主要表现在：解决了现有多套空分因液氧输送泵失效导致供气中断的情况，并通过增设备用液氧输送泵使得在常规输送泵失效的情况下可以正常运行供气，避免因液氧输送泵故障或启动缓慢造成供气中断，甚至引起安全问题。与常规双套空分后备输送流程相比，减少了两台从精馏塔出口去氧气管网的液氧流程泵，具有节约成本的作用。
附图说明
图1 是现有双套空分供气输送流程示意图；
图2是一种双套空分装置液氧输送泵失效保护装置流程示意图；
图3是任一台液氧输送泵故障供气流程示意图；
图4是两台液氧输送泵故障供气流程示意图。
具体实施方式
下面将结合附图对本发明作详细的介绍，如图1所示参照图1，现有双套空分供气输送流程，空分A/B正常运行情况下，液氧一路经由液氧循环泵P03A/B至换热器E01A/B气化，供气给用户，一路经由过冷器E03A/B去储槽SV01。空分A/B故障的情况下，液氧输送泵P01启动，将储槽内的液氧输送至水浴式汽化器LE01气化供给用户。一旦液氧输送泵P01出现故障或启动延时，氧气供应中断存在安全隐患。
如图2所示：一种双套空分装置液氧输送泵失效保护方法，包括空分A精馏塔E02A，空分B精馏塔E02B，空分A过冷器E03A，空分B过冷器E03B，空分A换热器E02A，空分B换热E02B，液氧储槽SV01，液氧输送泵ⅠP03A，液氧输送泵ⅡP03B，液氧输送泵ⅢP03C，第一换热器E01A入口液氧阀门HV01A，第二换热器E01B入口液氧阀门HV01B，水浴式汽化器进口液氧管道阀门HV01C，第一出换热器E01A氧气送第一调节阀FV01A，第二出换热器E01B氧气送第二调节阀FV01B。液氧经过冷器E03A/B进储槽SV01。在空分A/B正常运行的情况下，换热器E01A/B入口液氧阀门HV01A/B打开，液氧进入换热器E01A/B换热成氧气，氧气调节阀FV01A/B根据用户的用气量调节各自开度。在空分A或B联锁停车的情况下，对应的各自第一换热器E01A或第二换热器E01B入口液氧阀门HV01A或HV01B关闭，水浴式汽化器进口液氧管道阀门HV01C打开并调节到停车空分装置所对应的HV01A或HV01B的开度，按原所需供气量给用户供气。液氧输送泵P03A/B/C两台处于加载带负荷运行，另一台处于卸载惰转备用状态。一旦常规后备液氧输送泵失效及时切换备用泵，正常给用户供气，进而达到稳定生产的目的。
如图3~图4，液氧输送泵故障供失效保护方案，实现的方式如下：
1) 液氧输送泵P03A/B处于加载带负荷运行，P03C处于卸载惰转备用状态。当P03A出现停车状态，DCS将P03A泵故障信号、逻辑输出加载信号送给P03C泵，P03B泵状态保持不变。DCS将P03A泵故障前的频率和回流阀HV02A的开度置数给C泵对应的频率和回流阀HV02C的开度置数。当P03B出现停车状态，DCS将P03B泵故障信号、逻辑输出加载信号送给P03C泵，P03A泵状态保持不变。DCS将P03B泵故障前的频率和回流阀HV02B的开度置数给P03C泵对应的频率和回流阀HV02C的开度置数。
2)液氧输送泵P03A/C处于加载带负荷运行，P03B处于卸载惰转备用状态。当P03A出现停车状态，DCS将P03A泵故障信号、逻辑输出加载信号送给P03B泵，P03C泵状态保持不变。DCS将P03A泵故障前的频率和回流阀HV02A的开度置数给P03B泵对应的频率和回流阀HV02B的开度置数。当P03C出现停车状态，DCS将P03C泵故障信号、逻辑输出加载信号送给P03B泵，P03A泵状态保持不变。DCS将P03C泵故障前的频率和第三回流阀HV02C的开度置数给P03B泵对应的频率和第二回流阀HV02B的开度置数。
3)液氧输送泵P03B/C处于加载带负荷运行，P03A处于卸载惰转备用状态。当P03B出现停车状态，DCS将P03B泵故障信号、逻辑输出加载信号送给P03A泵，P03C泵状态保持不变。DCS将P03B泵故障前的频率和回流阀HV02B的开度置数给P03A泵对应的频率和第一回流阀HV02A的开度置数。当P03C出现停车状态，DCS将P03C泵故障信号、逻辑输出加载信号送给P03A泵，P03B泵状态保持不变。DCS将P03C泵故障前的频率和第三回流阀HV02C的开度置数给P03A泵对应的频率和第一回流阀HV02A的开度置数。
4)液氧输送泵P03A/B处于加载带负荷运行，P03C处于卸载惰转备用状态。当P03A/B出现停车状态，DCS将先故障的P03A泵故障信号、逻辑输出加载信号送给P03C泵。供气装置整体减负荷运转。
5) 液氧输送泵P03A/C处于加载带负荷运行，P03C处于卸载惰转备用状态。当P03A/B出现停车状态，DCS将先故障的液氧输送泵ⅠP03A故障信号、逻辑输出加载信号送给液氧输送泵ⅢP03C。供气装置整体减负荷运转。
液氧输送泵P03B/C处于加载带负荷运行，P03A处于卸载惰转备用状态。当P03B/C出现停车状态，DCS将先故障的液氧输送泵ⅡP03B故障信号、逻辑输出加载信号送给液氧输送泵ⅠP03A。供气装置整体减负荷运转。
本发明中液氧输送泵P03A/B/C两用一备，其中两台处于加载带负荷运行，另一台处于卸载惰转备用状态。当一台运行泵处于故障状态，会自动将故障信号和逻辑输出加载指令给备用泵，将故障前的频率和回流阀开度置数给备用泵，另一台运行泵状态保持不变，避免因后备输送泵失效导致供气中断引起的生产安全隐患。
本实用新型的构思为：本实用新型是通过三台液氧输送泵P03A/B/C两用一备，来实现双套空分的后备供气。一旦常规液氧输送泵失效及时切换备用泵，实现在泵失效的情况下持续稳定供气的的目的。

Claims (1)

1.一种双套空分装置液氧输送泵失效保护装置，它包括相互连接的精馏塔、过冷器、液氧储槽、液氧输送泵、换热器、水浴式汽化器组成，其特征在于所述精馏塔由上下排布的两个空分A精馏塔（E02A）和空分B精馏塔（E02B）组成，后方分别连接空分A过冷器（E03A）和空分B过冷器（E03B），所述空分A过冷器（E03A）和空分B过冷器（E03B）分别汇总后与后方的液氧储罐（SV01）相连接，其中液氧储罐（SV01）后方设有三条通道，分别连接液氧输送泵Ⅰ（P03A），液氧输送泵Ⅱ（P03B），液氧输送泵Ⅲ（P03C），每个液氧输送泵均设有相对应的第一回流阀（HV02A）、第二回流阀（HV02B）、第三回流阀（HV02C），所述在液氧输送泵Ⅰ（P03A），液氧输送泵Ⅱ（P03B），液氧输送泵Ⅲ（P03C）后方通过管道分别与第一调节阀（FV01A）、第二调节阀（FV01B）、第三调节阀（FV01C）相连，并且分别通过管道与后方的第一换热器（E01A）、水浴式汽化器（LE01）、第二换热器（E01B）连接，所述第一换热器（E01A）后方还设有第一调节阀（FV01A），第二换热器（E01B）后方设有第二调节阀（FV01B），所述第一调节阀（FV01A）、第二调节阀（FV01B）、第三调节阀（FV01C）、第一回流阀（HV02A）、第二回流阀（HV02B）、第三回流阀（HV02C）均由DCS逻辑控制。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114485056A (zh) * 2022-02-11 2022-05-13 开封黄河空分集团有限公司 一种空分的空气低温冷却液化装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114485056A (zh) * 2022-02-11 2022-05-13 开封黄河空分集团有限公司 一种空分的空气低温冷却液化装置
CN114485056B (zh) * 2022-02-11 2024-05-10 开封黄河空分集团有限公司 一种空分的空气低温冷却液化装置

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