一种生产高纯氮和带压低纯氧的方法

Method for producing high purity nitrogen and under-pressure low purity oxygen

Abstract

The invention relates to a method for producing high purity nitrogen and under-pressure low purity oxygen. Air cooled to a saturation state is sent to a lower tower to be separated into nitrogen and liquefied air, and then the nitrogen is cooled into liquid nitrogen, the liquid nitrogen and the liquefied air are respectively sent to a nitrogen tower to be rectified and obtain high purity nitrogen and oxygen-enriched liquid, the oxygen-enriched liquid is sent to an oxygen tower to be rectified and to prepare low purity oxygen, and a low purity oxygen cooling outlet box increases pressure by adopting a pressurization end of an expansion machine to increase pressure of oxygen. A part of liquid nitrogen in the nitrogen tower is pumped into the oxygen tower, thereby increasing purity of nitrogen and oxygen, and meeting high extraction rate of the nitrogen and the oxygen at the same time. The method for producing high purity nitrogen and under-pressure low purity oxygen uses the three-tower design, produces high purity nitrogen and low purity oxygen with pressure at the same time, is high in production efficiency and low in energy consumption, and can continuously produce the nitrogen and the oxygen which are needed by industries of float glass and the like.
本发明涉及一种生产高纯氮和带压低纯氧的方法,通过将冷却至饱和状态的空气送入下塔分离成为氮气和液态空气,然后将氮气冷却成液氮,液氮与液态空气分别送入氮塔精馏,得到高纯氮气和富氧液,将富氧液送入氧塔精馏制得低纯氧,低纯氧出冷箱利用膨胀机增压端增压提高氧气压力。本发明中,将部分氮塔中的液氮通入氧塔中,从而提高氮气与氧气纯度的同时,满足氮气与氧气的高提取率。本发明方法采用三塔设计,同时生产带有压力的高纯氮和低纯氧,生产效率高,能耗低,可以连续化生产浮化玻璃等行业所需的氮气和氧气。

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    CN-101492156-AJuly 29, 2009四川空分设备(集团)有限责任公司低能耗制氮方法和装置
    CN-102003867-AApril 06, 2011上海启元科技发展有限公司, 上海启元空分技术发展有限公司一种生产高纯氮和低纯氧的方法
    CN-102080921-AJune 01, 2011上海启元科技发展有限公司, 上海启元空分技术发展有限公司一种高压氮和低压氧的生产方法及装置
    CN-1097247-AJanuary 11, 1995英国氧气集团有限公司空气分离
    CN-201729662-UFebruary 02, 2011上海启元科技发展有限公司;上海启元空分技术发展有限公司一种生产带压力的高纯氮及高纯氧的装置

NO-Patent Citations (0)

    Title

Cited By (4)

    Publication numberPublication dateAssigneeTitle
    CN-103216999-AJuly 24, 2013凤阳徽亨商贸有限公司工业化氮气生产工艺
    CN-103216999-BApril 13, 2016凤阳徽亨商贸有限公司工业化氮气生产工艺
    CN-103968642-AAugust 06, 2014南通天源气体有限公司Tower type method for improving gas purity
    CN-103968642-BMay 18, 2016南通天源气体有限公司一种塔式提高气体纯度的方法