CN113959179B - 一种用于液氩提纯的装置及方法 - Google Patents

一种用于液氩提纯的装置及方法 Download PDF

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CN113959179B
CN113959179B CN202111575205.9A CN202111575205A CN113959179B CN 113959179 B CN113959179 B CN 113959179B CN 202111575205 A CN202111575205 A CN 202111575205A CN 113959179 B CN113959179 B CN 113959179B
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purification tower
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liquid argon
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CN113959179A (zh
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谭芳
韩一松
彭旭东
蒋云云
姚蕾
詹宇木
李玲
黄小清
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Hang Yang Group Co ltd
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Hangzhou Oxygen Plant Group Co Ltd
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Abstract

一种用于液氩提纯的装置及方法，所述装置包括液氩提纯塔系统、换热系统、热源提供系统、冷量补充系统、废液回收系统，方法为从精氩塔引出不合格低纯液氩，送入液氩提纯塔系统进行精馏并获得高纯液氩，来自热源提供系统的气体经换热系统冷却后进入液氩提纯塔系统作为热源，其自身被冷凝后经换热系统冷却后又进入液氩提纯塔系统作为冷源，冷量不足部分由冷量补充系统提供，废液进入原主空分设备的循环液氧泵入口进行回收利用，气体经换热系统进入热源提供系统压缩。本发明系统间高度耦合，适用于不同纯度的液氩进一步提纯，适用范围宽广，提升整体经济效益，同时，本装置布置在原主空分设备外，对原主空分设备改动影响小，操作灵活，可复制性强。

Description

一种用于液氩提纯的装置及方法
技术领域
本发明涉及气体分离技术，具体的说，利用低温精馏法，设计一种用于液氩提纯的装置及方法，将低纯液氩提纯为高纯液氩，属低温技术领域。
背景技术
氩是一种化学性质很不活泼的稀有气体，在飞机制造、造船、原子能工业和机械工业部门应用广泛，由于它既不能燃烧，也不助燃，因此，常作为特殊金属，例如铝、镁、铜及其合金和不锈钢在焊接的保护气，防止焊接件被空气氧化或氮化。
近年来，随着社会经济发展和工业技术的进步，市场对高纯氩的需求也越来越高，如电子工业用氩要求氧含量小于0.2ppm，氮含量小于0.5ppm，氢、一氧化碳、二氧化碳和总烃（以甲烷计）各小于0.1ppm。但一些空分设备由于种种原因导致从空分设备冷箱中出来的产品液氩纯度偏低（氧含量大于1ppm），无法满足工艺上对高纯液氩的要求，经济效益收到了极大限制；同时，对空分设备“安、稳、长、满、优”的运行要求不会给空分设备运营商长时间的改造时间，在对原主空分设备影响尽量小的前提下获得更高纯度的液氩成为众多生产厂家的选择。
发明内容
本发明要解决的技术问题是：设计一种用于液氩提纯的装置及方法，将低纯度的液氩转化为高纯度的液氩，不仅可靠性高，而且可以尽量降低对原运行主空分设备影响的问题。具有很好的实用价值和经济效益。为实现上述目的，本发明采用如下技术：一种用于液氩提纯的装置，所述装置包括液氩提纯塔系统、换热系统、热源提供系统、冷量补充系统、废液回收系统；相互之间通过管道连接，所述液氩提纯塔系统由液氩提纯塔、提纯塔冷凝器、提纯塔蒸发器和过冷器组成，所述液氩提纯塔的顶部输出端连接于所述提纯塔冷凝器的第一输入端，液氩提纯塔的顶部输入端连接于所述提纯塔冷凝器的第一输出端，提纯塔蒸发器直接连接于液氩提纯塔的底部，提纯塔蒸发器的第一输出端连接于所述过冷器的热端输入端，提纯塔冷凝器的第二输入端连接于所述过冷器的冷端输出端，提纯塔冷凝器的第二输出端连接于所述过冷器的冷端输入端，提纯塔冷凝器的第三输出端通过管道和阀门与大气相连，所述液氩提纯塔底部输出端连接于所述废液回收系统，所述液氩提纯塔的中部具有原料液输入端，其液氩提纯塔的中上部具有产品纯液氩的输出端，所述废液回收系统由废液利用输送管线管线间的阀门；所述废液利用输送管线的输出端连接于原主空分设备的循环液氧泵入口端。
作为优选：所述换热系统包括换热器，该换热器的冷端输入端连接于所述过冷器的热端输出端，换热器的冷端输出端连接于所述提纯塔蒸发器的输入端，所述换热器的热端输出端连接于所述热源提供系统的输入端。
作为优选：所述热源提供系统包括气体压缩机、放空管线，该气体压缩机的输入端和所述放空管线的输入端通过管道和阀门相连；所述气体压缩机的输出端连接于所述换热器的热端输入端；所述放空管线的输出端与大气相连。
作为优选：所述冷量补充系统包括冷液体补充输送管线，该冷液体补充输送管线的输入端连接于所述提纯塔冷凝器的第三输入端。
作为优选：所述液氩提纯塔为规整填料塔。
作为优选：所述过冷器和换热器为板翅式换热器。
一种用于液氩提纯的方法，包括以下步骤：
步骤1：从原主空分设备的精氩塔底部的原料不纯液氩经液氩提纯塔中部的原料液输入端进入液氩提纯塔进行精馏并在液氩提纯塔的中上部获得高纯度的液氩产品。
步骤2：经气体压缩机压缩后的气体经换热器的热端输入端进入换热器冷却，后经提纯塔蒸发器的输入端进入提纯塔蒸发器作为热源，使液氩提纯塔底部的液体蒸发成为上升蒸汽，其自身被冷凝后经提纯塔蒸发器的第一输出端输出进入过冷器的热端输入端，被过冷器过冷后，经过冷器的冷端输出端输出后节流减压后经提纯塔冷凝器的第二输入端进入提纯塔冷凝器作为冷源，外界提供的液体如液氮，经冷液体补充输送管线和提纯塔冷凝器的第三输入端进入提纯塔冷凝器以补充冷源，液氩提纯塔顶部的上升蒸汽经液氩提纯塔的顶部输出端通过提纯塔冷凝器的第一输入端进入提纯塔冷凝器后被冷却，冷凝部分经提纯塔冷凝器的第一输出端输出进入液氩提纯塔的顶部输入端进入液氩提纯塔顶部，作为液氩提纯塔的回流液，以保证液氩提纯塔的精馏顺利进行。而不被冷凝部分即废气经提纯塔冷凝器的第三输出端输出到大气排放。
步骤3：从提纯塔冷凝器的第二输出端输出的气体经过冷器的冷端输入端进入过冷器复热后又经过冷器的热端输出端输出，后经换热器的冷端输入端进入换热器继续复热，后经换热器的热端输出端输出大部分进入气体压缩机压缩，小部分不需要的气体经放空管线放空。
步骤4：在液氩提纯塔底部的一部分废液，经液氩提纯塔底部输出端输出，通过废液利用输送管线进入原主空分设备的循环液氧泵入口端，进入原主空分设备参与精馏回收利用。
作为优选：所述换热器的热端输入端的气体优选地为所述气体压缩机压缩的干净干燥的气体或从原主空分设备的纯化系统出来的干净干燥的低压空气。
本发明具有的有益效果如下：
本发明利用低温精馏法将原空分设备产出的低纯度的液氩进一步提纯，产出高纯度液氩产品。本发明系统间高度耦合，适用于不同纯度的液氩的进一步提纯，适用范围宽广，提升了整体经济效益，同时，本装置布置在原主空分设备外，对原主空分设备改动影响小，操作灵活，可复制性强。
附图说明
图1是本发明所述装置和方法的示意图。
图2是本发明所述装置和方法的一种变形实例示意图。
具体实施方式
为使本发明需解决的技术问题、技术方案和有益效果更加清楚，下面结合附图和具体实施方式对本发明作进一步详细说明。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。
下面将结合附图对本发明作详细的介绍：如图1所示：一种用于液氩提纯的装置，所述装置包括液氩提纯塔系统、换热系统、热源提供系统、冷量补充系统、废液回收系统；相互之间通过管道连接，所述液氩提纯塔系统由液氩提纯塔01、提纯塔冷凝器02、提纯塔蒸发器03和过冷器04组成，所述液氩提纯塔01的顶部输出端连接于所述提纯塔冷凝器02的第一输入端，液氩提纯塔01的顶部输入端连接于所述提纯塔冷凝器02的第一输出端，提纯塔蒸发器03直接连接于液氩提纯塔01的底部，提纯塔蒸发器03的第一输出端连接于所述过冷器04的热端输入端，提纯塔冷凝器02的第二输入端连接于所述过冷器04的冷端输出端，提纯塔冷凝器02的第二输出端连接于所述过冷器04的冷端输入端，提纯塔冷凝器02的第三输出端通过管道和阀门与大气相连，所述液氩提纯塔01底部输出端连接于所述废液回收系统，所述液氩提纯塔01的中部具有原料液输入端，其液氩提纯塔01的中上部具有产品纯液氩的输出端，所述废液回收系统由废液利用输送管线08管线间的阀门；所述废液利用输送管线08的输出端连接于原主空分设备的循环液氧泵20入口端。
所述换热系统包括换热器05，该换热器05的冷端输入端连接于所述过冷器04的热端输出端，换热器05的冷端输出端连接于所述提纯塔蒸发器03的输入端，所述换热器05的热端输出端连接于所述热源提供系统的输入端。
所述热源提供系统包括气体压缩机07、放空管线09，该气体压缩机07的输入端和所述放空管线09的输入端通过管道和阀门相连；所述气体压缩机07的输出端连接于所述换热器05的热端输入端；所述放空管线09的输出端与大气相连。
所述冷量补充系统包括冷液体补充输送管线06，该冷液体补充输送管线06的输入端连接于所述提纯塔冷凝器02的第三输入端。
所述液氩提纯塔01为规整填料塔。
所述过冷器04和换热器05为板翅式换热器。
一种用于液氩提纯的方法，包括以下步骤：
步骤1：从原主空分设备的精氩塔40底部的原料不纯液氩经液氩提纯塔01中部的原料液输入端进入液氩提纯塔01进行精馏并在液氩提纯塔01的中上部获得高纯度的液氩产品。
步骤2：经气体压缩机07压缩后的气体经换热器05的热端输入端进入换热器05冷却，后经提纯塔蒸发器03的输入端进入提纯塔蒸发器03作为热源，使液氩提纯塔01底部的液体蒸发成为上升蒸汽，其自身被冷凝后经提纯塔蒸发器03的第一输出端输出进入过冷器04的热端输入端，被过冷器04过冷后，经过冷器04的冷端输出端输出后节流减压后经提纯塔冷凝器02的第二输入端进入提纯塔冷凝器02作为冷源，外界提供的液体如液氮，经冷液体补充输送管线06和提纯塔冷凝器02的第三输入端进入提纯塔冷凝器02以补充冷源，液氩提纯塔01顶部的上升蒸汽经液氩提纯塔01的顶部输出端通过提纯塔冷凝器02的第一输入端进入提纯塔冷凝器02后被冷却，冷凝部分经提纯塔冷凝器02的第一输出端输出进入液氩提纯塔01的顶部输入端进入液氩提纯塔01顶部，作为液氩提纯塔01的回流液，以保证液氩提纯塔01的精馏顺利进行。而不被冷凝部分即废气经提纯塔冷凝器02的第三输出端输出到大气排放。
步骤3：从提纯塔冷凝器02的第二输出端输出的气体经过冷器04的冷端输入端进入过冷器04复热后又经过冷器04的热端输出端输出，后经换热器05的冷端输入端进入换热器05继续复热，后经换热器05的热端输出端输出大部分进入气体压缩机07压缩，小部分不需要的气体经放空管线09放空。
步骤4：在液氩提纯塔01底部的一部分废液，经液氩提纯塔01底部输出端输出，通过废液利用输送管线08进入原主空分设备的循环液氧泵入口端，进入原主空分设备参与精馏回收利用。
所述换热器05的热端输入端的气体优选地为所述气体压缩机07压缩的干净干燥的气体或从原主空分设备的纯化系统出来的干净干燥的低压空气。
具体实施例
下面将结合附图对本发明作详细的介绍：如图1所示：从原主空分设备的精氩塔40底部的纯度约为3 ppm氧、4 ppm氮的液氩经液氩提纯塔01中部的原料液输入端进入液氩提纯塔01中部进行精馏，在液氩提纯塔01的中上部获得氧含量小于0.2ppm，氮含量小于0.5ppm，氢、一氧化碳、二氧化碳和总烃（以甲烷计）各小于0.1ppm的高纯度液氩产品。其中液氩提纯塔01为规整填料塔。
经气体压缩机07压缩到如约0.35MPaA后的干净干燥空气经换热器05的热端输入端进入换热器05冷却到饱和温度后，经提纯塔蒸发器03的输入端进入提纯塔蒸发器03作为热源，使液氩提纯塔01底部的液体蒸发成为上升蒸汽，其自身被冷凝后经提纯塔蒸发器03的第一输出端输出后进入过冷器04的热端输入端，被过冷器04过冷，后经过冷器04的冷端输出端输出后节流减压到如约0.15MPaA后经提纯塔冷凝器02的第二输入端进入提纯塔冷凝器02作为冷源，外界提供的第二冷量液氮，经冷液体补充输送管线06和提纯塔冷凝器02的第三输入端进入提纯塔冷凝器02以补充冷源，液氩提纯塔01顶部的上升蒸汽经液氩提纯塔01的顶部输出端通过提纯塔冷凝器02的第一输入端进入提纯塔冷凝器02后被冷却，冷凝部分经提纯塔冷凝器02的第一输出端输出进入液氩提纯塔01的顶部输入端进入液氩提纯塔01顶部，作为液氩提纯塔01的回流液，以保证液氩提纯塔01的精馏顺利进行。而不被冷凝部分即废气经提纯塔冷凝器02的第三输出端输出到大气排放。
从提纯塔冷凝器02的第二输出端输出的气体经过冷器04的冷端输入端进入过冷器04复热后又经过冷器04的热端输出端输出，后经换热器05的冷端输入端进入换热器05继续复热，后经换热器05的热端输出端输出，大部分气体进入气体压缩机07压缩，小部分多余的气体经放空管线09放空。
在液氩提纯塔01底部的废液，经液氩提纯塔01底部输出端输出，通过废液利用输送管线08进入原主空分设备的循环液氧泵20入口端，进入原主空分设备参与精馏回收利用。
过冷器04和换热器05为板翅式换热器。
如果不配置气体压缩机07，也可以从原主空分设备的纯化系统的出口抽出干净干燥的低压空气进入换热器05的热端输入端输入冷却。或当装置刚开车，气体压缩机07没有处理气源时，可以先从原主空分设备的纯化系统的出口抽出干净干燥的低压空气进入换热器05的热端输入端输入冷却，而当气体压缩机07有处理气源后，切换到气体压缩机07压缩后的气体进入换热器05的热端输入端输入冷却。
附图2所示为本发明所述装置和方法的一种变形实例示意图。与附图1的不同点是考虑到从原主空分设备的精氩塔40底部的纯度约为3 ppm氧、4 ppm氮的液氩高度不够，不能直接经液氩提纯塔01中部的原料液输入端进入液氩提纯塔01中部，需先经液氩输送泵00加压后经液氩提纯塔01中部的原料液输入端进入液氩提纯塔01中部进行精馏。

Claims (8)

1.一种用于液氩提纯的装置，其特征在于：所述装置包括液氩提纯塔系统、换热系统、热源提供系统、冷量补充系统、废液回收系统；相互之间通过管道连接，所述液氩提纯塔系统由液氩提纯塔（01）、提纯塔冷凝器（02）、提纯塔蒸发器（03）和过冷器（04）组成，所述液氩提纯塔（01）的顶部输出端连接于所述提纯塔冷凝器（02）的第一输入端，液氩提纯塔（01）的顶部输入端连接于所述提纯塔冷凝器（02）的第一输出端，提纯塔蒸发器（03）直接连接于液氩提纯塔（01）的底部，提纯塔蒸发器（03）的第一输出端连接于所述过冷器（04）的热端输入端，提纯塔冷凝器（02）的第二输入端连接于所述过冷器（04）的冷端输出端，提纯塔冷凝器（02）的第二输出端连接于所述过冷器（04）的冷端输入端，提纯塔冷凝器（02）的第三输出端通过管道和阀门与大气相连，所述液氩提纯塔（01）底部输出端连接于所述废液回收系统，所述液氩提纯塔（01）的中部具有原料液输入端，其液氩提纯塔（01）的中上部具有产品纯液氩的输出端，所述废液回收系统由废液利用输送管线（08）管线间的阀门；所述废液利用输送管线（08）的输出端连接于原主空分设备的循环液氧泵（20）入口端。
2.根据权利要求1所述的用于液氩提纯的装置，其特征在于：所述换热系统包括换热器（05），该换热器（05）的冷端输入端连接于所述过冷器（04）的热端输出端，换热器（05）的冷端输出端连接于所述提纯塔蒸发器（03）的输入端，所述换热器（05）的热端输出端连接于所述热源提供系统的输入端。
3.根据权利要求2所述的用于液氩提纯的装置，其特征在于：所述热源提供系统包括气体压缩机（07）、放空管线（09），该气体压缩机（07）的输入端和所述放空管线（09）的输入端通过管道和阀门相连；所述气体压缩机（07）的输出端连接于所述换热器（05）的热端输入端；所述放空管线（09）的输出端与大气相连。
4.根据权利要求1所述的用于液氩提纯的装置，其特征在于：所述冷量补充系统包括冷液体补充输送管线（06），该冷液体补充输送管线（06）的输入端连接于所述提纯塔冷凝器（02）的第三输入端。
5.根据权利要求1所述的用于液氩提纯的装置，其特征在于：所述液氩提纯塔（01）为规整填料塔。
6.根据权利要求2所述的用于液氩提纯的装置，其特征在于：所述过冷器（04）和换热器（05）为板翅式换热器。
7.根据权利要求1-6中任一项所述装置用于液氩提纯的方法，其特征在于：包括以下步骤：
步骤1：从原主空分设备的精氩塔（40）底部的原料不纯液氩经液氩提纯塔（01）中部的原料液输入端进入液氩提纯塔（01）进行精馏并在液氩提纯塔（01）的中上部获得高纯度的液氩产品；
步骤2：经气体压缩机（07）压缩后的气体经换热器（05）的热端输入端进入换热器（05）冷却，后经提纯塔蒸发器（03）的输入端进入提纯塔蒸发器（03）作为热源，使液氩提纯塔（01）底部的液体蒸发成为上升蒸汽，其自身被冷凝后经提纯塔蒸发器（03）的第一输出端输出进入过冷器（04）的热端输入端，被过冷器（04）过冷后，经过冷器（04）的冷端输出端输出后节流减压后经提纯塔冷凝器（02）的第二输入端进入提纯塔冷凝器（02）作为冷源，外界提供的液体液氮，经冷液体补充输送管线（06）和提纯塔冷凝器（02）的第三输入端进入提纯塔冷凝器（02）以补充冷源，液氩提纯塔（01）顶部的上升蒸汽经液氩提纯塔（01）的顶部输出端通过提纯塔冷凝器（02）的第一输入端进入提纯塔冷凝器（02）后被冷却，冷凝部分经提纯塔冷凝器（02）的第一输出端输出进入液氩提纯塔（01）的顶部输入端进入液氩提纯塔（01）顶部，作为液氩提纯塔（01）的回流液，以保证液氩提纯塔（01）的精馏顺利进行，而不被冷凝部分即废气经提纯塔冷凝器（02）的第三输出端输出到大气排放；
步骤3：从提纯塔冷凝器（02）的第二输出端输出的气体经过冷器（04）的冷端输入端进入过冷器（04）复热后又经过冷器（04）的热端输出端输出，后经换热器（05）的冷端输入端进入换热器（05）继续复热，后经换热器（05）的热端输出端输出大部分进入气体压缩机（07）压缩，小部分不需要的气体经放空管线（09）放空；
步骤4：在液氩提纯塔（01）底部的一部分废液，经液氩提纯塔（01）底部输出端输出，通过废液利用输送管线（08）进入原主空分设备的循环液氧泵入口端，进入原主空分设备参与精馏回收利用。
8.根据权利要求7所述的液氩提纯的方法，其特征在于：所述换热器（05）的热端输入端的气体为所述气体压缩机（07）压缩的干净干燥的气体或从原主空分设备的纯化系统出来的干净干燥的低压空气。
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