CN210569509U - 一种小型单塔精馏制氮系统 - Google Patents

一种小型单塔精馏制氮系统 Download PDF

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CN210569509U
CN210569509U CN201921471180.6U CN201921471180U CN210569509U CN 210569509 U CN210569509 U CN 210569509U CN 201921471180 U CN201921471180 U CN 201921471180U CN 210569509 U CN210569509 U CN 210569509U
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俞益波
孙方军
吕敏
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Zhejiang Ziming Technology Co Ltd
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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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    • F25J3/044—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 single pressure main column system only
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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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
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    • 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
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    • 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
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Abstract

本实用新型涉及一种小型单塔精馏制氮系统，包括：单级制氮精馏塔、气泡泵、制冷机、换热器、高效散堆填料；本专利采用气泡泵而不是压差将回流液泵回精馏塔顶部，可以整体降低精馏系统的压力，回收精馏冷量，降低精馏能耗；由制冷机代替膨胀机为精馏系统提供冷量，降低设备噪声，同时采用高效散堆填料进行低温精馏空分，便于设备小型化。

Description

一种小型单塔精馏制氮系统
技术领域
本实用新型涉及低温精馏空分领域，尤其涉及一种小型单塔精馏制氮系统。
背景技术
由于氮气的化学惰性，已被广泛应用于食品保鲜、粮食仓储、金属热处理、石油化学工业、宇航技术、玻璃工业等诸多领域。在氮气以及液氮的一部分应用场合，使用者能够通过购买大型空分设备生产的瓶装氮气或者杜瓦装液氮来满足需求。但是，在有些应用场合，使用者不方便购置已有的氮气或液氮，需要在有限的现场空间安置氮生产设备。
目前小型制氮设备主要采用PSA以及膜分离技术。而常温制氮技术只能够制取气氮。同时，当氮气纯度体积分数＞99.9％时，常温制氮方法提取率较温精馏方法低，且能耗高。
实用新型内容
为了提供一种小型的制氮设备，解决现有的小型制氮设备主要采用PSA以及膜分离技术，而常温制氮技术只能够制取气氮，同时，当氮气纯度体积分数＞99.9％时，常温制氮方法提取率较温精馏方法低，且能耗高的问题，本实用新型的目的是克服现有技术存在的缺陷，提供一种小型单塔精馏制氮系统，所述的小型单塔精馏制氮系统包括单级制氮精馏塔以及设置于塔内的高效散堆填料；气泡泵、制冷机、换热器；所述单级制氮精馏塔的底部设置有进料口以及富氧液空出口，顶部设置有氮气出口以及液氮回流口；所述气泡泵连接在精馏塔顶部，另一端换热器；气泡泵与换热器之间连有制冷机；所述的换热器与单级制氮精馏塔以及气泡泵管道连接。
优选地，所述的小型单塔精馏制氮系统中的高效散堆填料为狄克松填料或者马鞍形填料。
优选地，所述的小型单塔精馏制氮系统中的小型单塔精馏制氮装置安置在高效的绝热保温冷箱中，管道出口与冷箱之间采用隔热保温结构。
优选地，所述的小型单塔精馏制氮系统的单级制氮精馏塔上，沿塔高布置纯度测口；并沿塔高布置有再分布器一种小型单塔精馏制氮系统。
一种小型单塔精馏制氮流程，包括单级制氮精馏塔、气泡泵、制冷机、换热器、高效散堆填料。干燥洁净的原料空气进入精馏系统，在所述换热器中被富氧液空冷却后，分为两路。一路空气为气泡泵提供加热源并与另一路调节压力后的原料空气混合进入精馏塔。单级制氮精馏塔的底部设置有进料口以及富氧液空出口，顶部设置有氮气出口以及液氮回流口。空气从进料口进入精馏塔底部，与塔底富集的富氧液空换热产生的气体沿塔向上，与流下的液体在所述高效散堆填料上相互作用最终完成塔内的精馏过程。气泡泵连接在精馏塔顶部，接收塔顶流出的氮气，输送给所述制冷机进行冷凝，并将已被制冷机冷凝的液氮泵回精馏塔内参与精馏，同时排出液氮产品。制冷机将塔顶氮气冷凝，为单级制氮精馏塔提供回流液，也为整个系统提供精馏所需的冷量。高效散堆填料可以根据需要采用狄克松填料、马鞍形填料等。小型单塔精馏制氮安置在高效的绝热保温冷箱中，管道出口与冷箱之间采用隔热保温结构。在小型精馏塔塔体上，沿塔高布置若干纯度测口，以测量沿塔高的氮、氧等组分的纯度变化。并沿塔高布置若干再分布器。
采用上述技术方案的明显优势是：
采用气泡泵而不是压差将回流液泵回精馏塔顶部，可以整体降低精馏系统的压力，回收精馏冷量，降低精馏能耗。由制冷机代替膨胀机为精馏系统提供冷量，降低设备噪声，同时采用高效散堆填料进行低温精馏空分，便于设备小型化。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本实用新型一种小型单塔精馏制氮设备连接示意图。
具体实施方式
下面结合实施例对本实用新型做进一步的详细说明，以下实施例是对本实用新型的解释而本实用新型并不局限于以下实施例。
实施例：
如图1所示，一种小型单塔精馏制氮流程，包括单级制氮精馏塔1、气泡泵2、制冷机3、换热器4、高效散堆填料5。干燥洁净的原料空气进入精馏系统，在所述换热器中被富氧液空冷却后，分为两路。一路空气为气泡泵提供加热源并与另一路调节压力后的原料空气混合进入精馏塔。单级制氮精馏塔的底部设置有进料口以及富氧液空出口，顶部设置有氮气出口以及液氮回流口。空气从进料口进入精馏塔底部，与塔底富集的富氧液空换热产生的气体沿塔向上，与流下的液体在所述高效散堆填料上相互作用最终完成塔内的精馏过程。气泡泵连接在精馏塔顶部，接收塔顶流出的氮气，输送给所述制冷机进行冷凝，并将已被制冷机冷凝的液氮分别存储、作为产品排出以及泵回精馏塔内参与精馏，同时排出液氮产品。制冷机将氮气冷凝为液氮，提供精馏塔的回流液，为整个系统提供精馏所需的冷量。高效散堆填料可以根据需要采用狄克松填料、马鞍形填料等。小型单塔精馏制氮安置在高效的绝热保温冷箱中，管道出口与冷箱之间采用隔热保温结构。在小型精馏塔塔体上，沿塔高布置若干纯度测口，以测量沿塔高的氮、氧等组分的纯度变化。并沿塔高布置若干再分布器。
本实用新型的具体实施过程为：干燥洁净的空气进入换热器被冷却并分为两路。一路空气经由管道进入气泡泵的加热装置，为气泡泵产生气泡提供热量，再经由管道与另一路经过压力调节的空气汇合，一同进入精馏塔塔釜作为精馏塔的原料。气体沿塔向上经过精馏过程纯度增高，通过气泡泵与精馏塔的连接处进入气泡泵，再进入制冷机被冷凝为液氮后流回气泡泵。气泡泵将一部分液氮提升回精馏塔顶部作为精馏的回流液，并引出一部分液氮作为产品。塔釜底部的富氧液空经由管道进入换热器被原料空气加热，冷量被回收。
此外，需要说明的是，本说明书中所描述的具体实施例，其零、部件的形状、所取名称等可以不同。凡依本实用新型专利构思所述的构造、特征及原理所做的等效或简单变化，均包括于本实用新型专利的保护范围内。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，只要不偏离本实用新型的结构或者超越本权利要求书所定义的范围，均应属于本实用新型的保护范围。

Claims (4)

1.一种小型单塔精馏制氮系统，其特征在于：所述的小型单塔精馏制氮系统包括单级制氮精馏塔(1)以及设置于塔内的高效散堆填料(5)；气泡泵(2)、制冷机(3)、换热器(4)；
所述单级制氮精馏塔(1)的底部设置有进料口以及富氧液空出口，顶部设置有氮气出口以及液氮回流口；
所述气泡泵(2)连接在精馏塔顶部，另一端换热器(4)；气泡泵(2)与换热器(4)之间连有制冷机(3)；所述的换热器与单级制氮精馏塔(1)以及气泡泵(2)管道连接。
2.根据权利要求1所述的小型单塔精馏制氮系统，其特征在于：所述高效散堆填料(5)为狄克松填料或者马鞍形填料。
3.根据权利要求1所述的小型单塔精馏制氮系统，其特征在于：小型单塔精馏制氮装置安置在高效的绝热保温冷箱中，管道出口与冷箱之间采用隔热保温结构。
4.根据权利要求1所述的小型单塔精馏制氮系统，其特征在于：在所述的单级制氮精馏塔(1)上，沿塔高布置纯度测口；并沿塔高布置有再分布器。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115507619A (zh) * 2022-10-18 2022-12-23 江苏克劳特低温技术有限公司 一种双塔精馏制取高纯甲烷的装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115507619A (zh) * 2022-10-18 2022-12-23 江苏克劳特低温技术有限公司 一种双塔精馏制取高纯甲烷的装置

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