An air separation system using liquefied air to extract the poor krypton xenon products, which consists of an air separation distillation column mainly composed of the upper and lower towers through the intermediate main condensing evaporator. The lower tower leads to the liquefied air pipes to connect to the upper tower and the coarse argon condenser connected to the upper part of the crude argon tower respectively, and the liquefied air is extracted from the crude argon condenser to access the poor. Krypton and xenon tower, after the cooling of the poor krypton and xenon tower evaporator fixed at the bottom of the poor krypton and xenon tower, is extracted from the bottom of the xenon krypton xenon liquid, and the saturated air of the krypton and xenon tower, which leads to the saturated air of the krypton xenon tower, is connected and sent to the upper tower. The method includes: A, the liquefied air passage derived from the crude argon condenser. The No. 1 pipeline is used as the raw material to enter the top distillation of the poor krypton xenon tower. In the poor krypton and xenon tower evaporator, the poor krypton and xenon liquid products are taken out through No. 2 pipeline, and the air from the top of the poor krypton and xenon tower is taken out through the No. 3 pipeline to enter the middle part of the upper tower, and the air of the critical point of B and gas and liquid passes through the 4 line into the lower tower to participate in the distillation, and the other is to take part in the distillation. A small part enters the absorption chamber of the absorption cavity of the poor krypton and xenon tower evaporator through the No. 5 pipeline, and the liquefied air after the 6 pipeline is reduced to the middle of the upper tower and participates in the distillation.
【技术实现步骤摘要】
一种利用液化空气提取贫氪氙产品的空分系统及方法
本专利技术涉及的是一种利用液化空气提取贫氪氙产品的空分系统及方法,属于能源、化工领域的低温空气分离技术。
技术介绍
稀有气体一般是指氩、氖、氦、氪、氙五种气体。除了氦主要由天然气提取外,空气是这些稀有气体的主要来源。随着国民经济的发展,稀有气体的应有越来越广泛,需求也越来越大,从空气中回收稀有气体显露出极高的经济价值。目前贫氪氙液的提取主要通过大型空分中所带的氪氙粗制装置实现。这种制取方法必须在空分上塔低部或者粗氩冷凝器顶部安装一段精馏塔板,如若建设初期没安装这段塔板则不能够通过这种方法制取贫氪氙液,如图1所示;而且在上塔加装的这段塔板上气液比和上塔其他部分相比有很大差别,稍有设计偏差和操作偏差容易造成整个空分工况的不稳定。因此,设计操作难度高,投资大,产量受空分规模的限制,难适应现代化企业对氪氙越来越大的需求。
技术实现思路
本专利技术的目的在于克服现有技术存在的不足,而提供一种可在不增加空分塔板的前提下提取贫氪氙液,既适用于新上空分装置建设、也适用于原有未带氪氙粗制装置空分改造,具备投资及占用空间都比较小且适用性强的利用液化空气提取贫氪氙产品的空分系统及方法。本专利技术的目的是通过如下技术方案来完成的,一种利用液化空气提取贫氪氙产品的空分系统,它包括一主要由上塔和下塔通过中间主冷凝蒸发器构成的空分精馏塔,所述空分精馏塔下塔引出液化空气用管路分别接入上塔和粗氩塔上部相接的粗氩冷凝器,所述的粗氩冷凝器中引出液化空气接入贫氪氙塔,经过所述固定于贫氪氙塔底部相接的贫氪氙塔蒸发器的冷却之后,从底部引出提取的贫氪氙液,贫 ...
【技术保护点】
1.一种利用液化空气提取贫氪氙产品的空分系统,它包括一主要由上塔(C2)和下塔(C1)通过中间主冷凝蒸发器(K1)构成的空分精馏塔,所述空分精馏塔下塔(C1)引出液化空气用管路分别接入上塔(C2)和粗氩塔(C3)上部相接的粗氩冷凝器(K2),其特征在于所述的粗氩冷凝器(K2)中引出液化空气接入贫氪氙塔(C4),经过所述固定于贫氪氙塔(C4)底部相接的贫氪氙塔蒸发器(K4)的冷却之后,从底部引出提取的贫氪氙液,贫氪氙塔(C4)的顶部引出氪氙成分的饱和态空气用管路连接并送入上塔(C2)。
【技术特征摘要】
1.一种利用液化空气提取贫氪氙产品的空分系统,它包括一主要由上塔(C2)和下塔(C1)通过中间主冷凝蒸发器(K1)构成的空分精馏塔,所述空分精馏塔下塔(C1)引出液化空气用管路分别接入上塔(C2)和粗氩塔(C3)上部相接的粗氩冷凝器(K2),其特征在于所述的粗氩冷凝器(K2)中引出液化空气接入贫氪氙塔(C4),经过所述固定于贫氪氙塔(C4)底部相接的贫氪氙塔蒸发器(K4)的冷却之后,从底部引出提取的贫氪氙液,贫氪氙塔(C4)的顶部引出氪氙成分的饱和态空气用管路连接并送入上塔(C2)。2.根据权利要求1所述的利用液化空气提取贫氪氙产品的空分系统,其特征在于所述的贫氪氙塔蒸发器(K4)的吸收腔(G4)输入接口连接从空分输入的中压气液临界点的空气或从外界输入的中压氮气,所述的贫氪氙塔蒸发器(K4)的吸收腔(G4)输出接口接出液化空气输入上塔(C2)或连接液氮管线。3.一种利用权利要求1或2所述空分系统提取贫氪氙产品的方法,其特征在于所述的方法包括:a、从粗...
【专利技术属性】
技术研发人员:沈浩,张敏,李楠,
申请(专利权)人:浙江新锐空分设备有限公司,
类型:发明
国别省市:浙江,33
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