CN1325865C - 一种利用制氧机组生产氩的方法 - Google Patents

一种利用制氧机组生产氩的方法 Download PDF

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CN1325865C
CN1325865C CNB021088594A CN02108859A CN1325865C CN 1325865 C CN1325865 C CN 1325865C CN B021088594 A CNB021088594 A CN B021088594A CN 02108859 A CN02108859 A CN 02108859A CN 1325865 C CN1325865 C CN 1325865C
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argon
oxygenerator
hydrogen
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oxygen generators
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CN1451603A (zh
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杜金明
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XINXIN VANADIUM TITANIUM CO Ltd CHENGDE CITY
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    • 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)
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    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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    • 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
    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04654—Producing crude argon in a crude argon column
    • F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
    • F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
    • F25J3/04703—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser being arranged in more than one vessel
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    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
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    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/58—Argon
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    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
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Abstract

本发明涉及一种利用制氧机组生产氩的方法，特别是一种利用多个制氧机不同制氩工艺组合生产氩的方法。将加氢制氩制氧机和无氢制氩制氧机或者两个、两个以上加氢制氩制氧机通过液体、气体管道以及液体、气体储备装置组合连接起来，使加氢制氩制氧机中未经加氢除氧的粗氩气或液氩，进入无氢制氩制氧机或另一台加氢制氩制氧机的粗氩塔进行氧、氩分离，并进一步精馏提取后，得到纯液氩。可节省制氢站或节约一台制氢站。适用于对现有加氢制氩制氧机和无氢制氩制氧机的改造，提高制氧机的氩产量，降低制氩成本。

Description

一种利用制氧机组生产氩的方法
技术领域：本发明涉及一种利用制氧机组生产氩的方法，特别是一种利用多个制氧机不同制氩工艺组合生产氩的方法。
背景技术：带有制氩流程的制氧机，从工艺上可划分为加氢制氩流程的制氧机和无氢制氩流程的制氧机两种，加氢制氩流程的制氧机是国内制氧机第四、五代产品，其结构一般为筛板塔结构；而无氢制氩流程的制氧机是第六代产品，工艺先进，为填料塔结构。这两种类型产品也是目前围内应用最为广泛的，就加氢制氩制氧机而言，由于配套制氢设备的电解槽耗电量大，一年电费可达37万无，且制氢安全系数低，极易发生爆炸，所以很多企业都将这部分功能闲置下来，白白浪费了氩资源，以我厂为例，每年因不能生产氩给公司造成大约一千万元以上的损失。无氢制氩制氧机虽没有这个问题，但使用过程中发现粗氩气的设计流量偏低，而氩馏份的含氩率有限，使得设备未能充分发挥其生产能力。
发明目的：针对上述问题，本发明提供一种利用制氧机组生产氩的方法，利用加氢制氩制氧机与无氢制氩制氧机组合，将加氢制氩制氧机中白白放掉的粗氩引入无氢制氩制氧机，参加精馏提取，以提高制氧机的氩产量。本发明还提供一种制氩方法：将两个、两个以上加氢制氩制氧机组合，前端加氢制氩制氧机制氩流程中未经加氢除氧的粗氩气或液氩，引入尾端加氢制氩制氧机的氧纯化器中进行氧、氩分离，从而减少制氢站，减少费用。
技术方案：一种利用制氧机组生产氩的方法，将加氢制氩流程和无氢制氩流程的制氧机通过液体和气体管道以及液体和气体储备装置组合连接起来，将各个加氢制氩制氧机制氩流程中未经加氢除氧的粗氩气或液氩，引入无氢制氩制氧机的粗氩塔进行氧、氩分离，得到粗氩气，经粗氩冷凝器液化后，进入精氩塔中部进行精馏，再一次氩、氮分离后，在精氩塔底部得到纯液氩。
把加氢制氩流程和无氢制氩流程的制氧机通过液体和气体管道以及液体和气体储备装置组合连接起来，使各个加氢制氩制氧机的上精馏塔中下部抽出的含氩8％左右的氩馏份，在各自的粗氩塔精馏，所得粗氩气会合后进入氩气压缩机压缩，过纯化器进入换热器，与返流气体换热后进入一个加氢制氩制氧机的精氩塔底部，与工艺液氮换热后冷凝为液体，粗液氩从精氩塔底部引出，送入精氩塔中部参与精馏，使氩中的氮组分分离，从而在精氩塔底部得到除氮后含微量氧的液氩半成品，这种液氩半成品被引入无氢制氩制氧机的粗氩塔进行氧、氩分离，得到粗氩气，经粗氩冷凝器液化后，进入精氩塔中部进行精馏，再一次氩、氮分离后，在精氩塔底部得到纯液氩。
一种利用制氧机组生产氩的方法，将两个或两个以上加氢制氩流程制氧机通过液体和气体管道以及液体和气体储备装置组合连接起来，将前端加氢制氩制氧机制氩流程中未经加氢除氧的粗氩气或液氩，引入尾端加氢制氩制氧机约氧纯化器进行除氧，经冷凝、干燥、冷却后，进入精氩塔进行精馏，排出氮气及除氧添加的过量的氢，在精氩塔底部得到纯液氩，用这种方式可至少节省一台制氢站。
有益效果：由于采用上述技术方案、本发明降低了制氩成本，体现在：第一技术方案节省了制氢站及塔外加氢脱氧的辅助设备，每班可成少至少两名操作工，降低制氢的成本和动力消耗。不用加氢，也提高了制氩的安全性。制氧机组合方式较单机生产捉高了产量。缩短了生产周期，比以往出精氩的24小时可缩短10小时以上。维修或故障时工况恢复快。第二技术方案可至少节省一台制氢站。
附图说明：图1为两台制氧机液氩半成品联网的流程图；
图2为三台制氧机液氩半成品联网的流程图。
实施例：
1、如图1所示，从加氢制氩流程制氧机(以下简称1号制氧机)的分馏塔上塔5将8-10％、含氮量小于0.06％的氩馏份，通过管1送入粗氩塔3的下部，经冷凝器4液化后的馏份，经管2回到分馏塔上塔5，同时氩馏份过精馏浓缩为含氩97％的粗氩气从管6出来，进入氩气压缩机7压缩，进气压力为0.005Mpa，排气压力为0.32Mpa，经压缩的粗氩气进入精氩塔8底部，与工艺液氮换热后冷凝为液体，冷凝后的粗液氩从精氩塔底部引出，送入精氩塔中部参与精馏，使氩中的氮组分分离，从而在精氩塔底部得到除氮后含微量氧的液氩半成品，这种液氩半成品经管道10引入2号制氧机的粗氩塔11底部，汇同2号制氧机粗氩塔12的粗氩共同在粗氩塔11进行精馏除氧。所得粗氩气经粗氩冷凝器13液化后，得到粗液氩和350m3/h的粗氩气，粗液氩经管道14回流入粗氩塔11，粗氩气经管道15导入冷凝器16液化，粗液氩经管道17进入精氩塔18进行精馏，从而在精氩塔底部得到纯液氩。
2、参见图2，将320m3/h、650m3/h的加氢制氩流程制氧机(以下分别简称为1#制氧机、2#制氧机)，和6500m3/h无氢制氩流程制氧机(以下分别简称为3#制氧机)通过液体和气体管道以及液体和气体储备装置组合连接起来，具体是将1#制氧机粗氩塔1#-1上高的排放管道G-1，与2#制氧机粗氩塔2#-1 的排放管道G-2，会合后，通过氩压缩机压缩，沿管道G-3送入2#制氧机精氩塔2#-2底部进行精馏、冷凝，所得液氩半成品连同3#制氧机3#-1粗氩塔所得粗氩，共同经管道G-4进入3#-2粗氩塔底部，进行氧、氩分离，经冷凝器冷凝后得到粗氩，入3#-3化精氩塔精馏，得到纯液氩。用这种方式可节省一台制氢站。

Claims (2)

1、一种利用制氧机组生产氩的方法，其特征在于：将加氢制氩流程和无氢制氩流程的制氧机通过液体和气体管道以及液体和气体储备装置组合连接起来，将各个加氢制氩制氧机制氩流程中未经加氢除氧的粗氩气或液氩，引入无氢制氩制氧机的粗氩塔进行氧、氩分离，得到粗氩气，经粗氩冷凝器液化后，进入精氩塔中部进行精馏，再一次氩、氮分离后，在精氩塔底部得到纯液氩。
2、一种利用制氧机组生产氩的方法，其特征在于：两个或两个以上加氢制氩流程制氧机通过液体和气体管道以及液体和气体储备装置组合连接起来，将前端加氢制氩制氧机制氩流程中未经加氢除氧的粗氩气或液氩，引入尾端加氢制氩制氧机的氧纯化器中进行除氧，经冷凝、干燥、冷却后，进入精氩塔进行精馏，排出氮气及除氧添加的过量的氢，在精氩塔底部得到纯液氩。
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