CN102829605A - Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling - Google Patents
Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling Download PDFInfo
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- CN102829605A CN102829605A CN2012103297364A CN201210329736A CN102829605A CN 102829605 A CN102829605 A CN 102829605A CN 2012103297364 A CN2012103297364 A CN 2012103297364A CN 201210329736 A CN201210329736 A CN 201210329736A CN 102829605 A CN102829605 A CN 102829605A
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Abstract
The invention relates to an air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling. The air separation device is used for solving the technical problem of directly producing collectable liquid oxygen products by using a rectifying tower. The air separation device comprises the rectifying tower, a condensing evaporator, a liquid nitrogen storage tank, a liquid nitrogen conveying valve, a liquid nitrogen conveying pipeline, a liquid oxygen storage tank, a liquid oxygen conveying valve and a liquid oxygen conveying pipeline, wherein the rectifying tower is provided with an upper tower; the condensing evaporator is arranged in the rectifying tower; the liquid nitrogen conveying pipeline is used for conveying the liquid nitrogen to the upper tower; the liquid oxygen conveying pipeline is used for conveying liquid oxygen to the liquid oxygen storage tank; one end of the liquid nitrogen conveying pipeline is communicated with the upper tower; the other end of the liquid nitrogen conveying pipeline is communicated with the liquid nitrogen storage tank; the liquid nitrogen conveying valve is arranged on the liquid nitrogen conveying pipeline; one end of the liquid oxygen conveying pipeline is communicated with the evaporating side of the condensing evaporator; the other end of the liquid oxygen conveying pipeline is communicated with the liquid oxygen storage tank; and the liquid oxygen conveying valve is arranged on the liquid oxygen conveying pipeline.
Description
Technical field
The invention belongs to the technical field of air separation plant, specifically relate to a kind ofly utilize liquid nitrogen to pour in down a chimney to provide cold to produce the air separation unit of liquid oxygen.
Background technology
Air separation plant briefly is exactly to be used for separating airborne each component gas, produces a cover industrial equipment of oxygen, nitrogen and argon gas.It comprises compositions such as air filtering system, air compressor system, air precooling system, air cleaning system, air compression-expansion system, air-seperation system, oxygen compression system, nitrogen pressure compression system.Wherein, for being used for the air-seperation system of separating nitrogen, oxygen, it will be made up of the rectifying column system.In the following tower of this rectifying column; Uprising gas fully contacts with dirty liquid, behind the heat and mass, obtains pure nitrogen gas at the top; Purity nitrogen gets into down, and the main condenser evaporimeter and the liquid oxygen exchange heat of top of tower are condensed; The phegma of tower is dirty under the conduct of part liquid nitrogen, and some liquid nitrogen is cold excessively through heat exchanger, and entering is gone up tower and participated in rectifying after the throttling; The liquid air of following tower gets into through heat exchanger and goes up tower participation rectifying; Through the rectifying once more in last tower, produce nitrogen at the top of last tower and produce liquid oxygen in the bottom of following tower; Nitrogen that last tower produces and the dirty nitrogen heat exchanger of flowing through.This liquid oxygen carries out exchange heat through the nitrogen of main condenser evaporimeter and following tower, and the bottom that is formed on tower after the liquid oxygen evaporation produces oxygen.That is to say that adopting the air separation unit major product of this structure is nitrogen, oxygen, can't satisfy the demand of producing liquid oxygen.If liquid oxygen is extracted then in the main condenser evaporimeter, can't provide enough colds to make liquefaction of nitrogen, thus produce enough liquid nitrogen supply with go up tower and down tower isolate qualified oxygen, nitrogen.
Summary of the invention
The purpose of this invention is to provide a kind of air separation unit that utilizes liquid nitrogen to pour in down a chimney to provide cold to produce liquid oxygen, it can make the rectifying column Direct Production go out the liquid oxygen product that can supply collect.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind ofly utilize liquid nitrogen to pour in down a chimney to provide cold to produce the air separation unit of liquid oxygen; Comprise rectifying column and be arranged on the condenser/evaporator in the said rectifying column with last tower; Also comprise liquid nitrogen tank, liquid nitrogen dispatch valve, be used for carrying liquid nitrogen dispatch pipeline, liquid oxygen tank, the liquid oxygen dispatch valve of liquid nitrogen, being used for liquid oxygen dispatch pipeline to said liquid oxygen tank conveying liquid oxygen to the said tower of going up; One end of said liquid nitrogen dispatch pipeline is connected with the said tower of going up; The other end of said liquid nitrogen dispatch pipeline is connected with said liquid nitrogen tank, and said liquid nitrogen dispatch valve is located on the said liquid nitrogen dispatch pipeline, and an end of said liquid oxygen dispatch pipeline is connected with the evaporation side of said condenser/evaporator; The other end of said liquid oxygen dispatch pipeline is connected with said liquid oxygen tank, and said liquid oxygen dispatch valve is located on the said liquid oxygen dispatch pipeline.
The present invention compares the outstanding and beneficial technical effects of prior art: air separation unit of the present invention is extracted the liquid oxygen in the condenser/evaporator out through liquid oxygen tank, liquid oxygen dispatch valve, liquid oxygen dispatch pipe and is obtained the liquid oxygen product; Through liquid nitrogen tank, liquid nitrogen dispatch valve and liquid nitrogen dispatch pipeline configuration; To send into tower be that last tower provides cold with being stored in liquid nitrogen in the liquid nitrogen tank; Oxygen is condensed into liquid oxygen, thereby the nitrogen, the oxygen that do not influence in the tower separate.
Description of drawings
Fig. 1 is a sketch map of the present invention.
The specific embodiment
The present invention is further described with specific embodiment below in conjunction with accompanying drawing;
As shown in Figure 1; Utilizing liquid nitrogen to pour in down a chimney provides cold to produce the air separation unit of liquid oxygen; Comprise rectifying column 1 and be arranged on the condenser/evaporator 2 in the rectifying column, also comprise liquid nitrogen tank 3, liquid nitrogen dispatch valve (figure is last not to be shown), be used for the liquid oxygen dispatch pipeline 6 that tower is upwards carried liquid nitrogen dispatch pipeline 4, liquid oxygen tank 5, the liquid oxygen dispatch valve (figure is last not to be shown) of liquid nitrogen, is used for carrying to liquid oxygen tank liquid oxygen with last tower 11.One end of liquid nitrogen dispatch pipeline 4 is connected with last tower 11, and the other end of liquid nitrogen dispatch pipeline 4 is connected with liquid nitrogen tank 3.This liquid nitrogen dispatch pipeline is extracted the liquid nitrogen in the liquid nitrogen tank and introduce and go up in the tower out.Liquid nitrogen dispatch valve is located on the liquid nitrogen dispatch pipeline.One end of liquid oxygen dispatch pipeline 6 is connected with the evaporation side of condenser/evaporator 2, and the other end of liquid oxygen dispatch pipeline 6 is connected with liquid oxygen tank 5.This liquid oxygen dispatch pipeline is extracted the liquid oxygen in the condenser/evaporator and introduce in the liquid oxygen tank out.Liquid oxygen dispatch valve is located on the liquid oxygen dispatch pipeline.This air separation unit obtains the liquid oxygen product through liquid oxygen tank, liquid oxygen dispatch valve, liquid oxygen dispatch pipe with the extraction of the liquid oxygen in the condenser/evaporator.For existing air separation unit, after liquid oxygen was drawn out of, the evaporation side liquid oxygen evaporation capacity of condenser/evaporator was big; The shortage of heat that can cause tower adopts through liquid nitrogen tank, liquid nitrogen dispatch valve and liquid nitrogen dispatch pipeline configuration, and to send into tower be that last tower provides cold with being stored in liquid nitrogen in the liquid nitrogen tank; This cold by vaporization of liquid oxygen after and the oxygen absorption that produces; Make oxygen be condensed into liquid oxygen again,, form liquid oxygen product through after a series of rectifying; Form nitrogen behind the liquid nitrogen released cold quantity again.The air separation unit that this real embodiment provides has been realized producing liquid oxygen and is provided with the form of product on the basis that does not influence original air separation.
The foregoing description is merely preferred embodiment of the present invention, is not to limit protection scope of the present invention according to this, so: all equivalences of doing according to structure of the present invention, shape, principle change, and all should be covered by within protection scope of the present invention.
Claims (1)
1. one kind is utilized liquid nitrogen to pour in down a chimney to provide cold to produce the air separation unit of liquid oxygen; Comprise rectifying column and be arranged on the condenser/evaporator in the said rectifying column with last tower; It is characterized in that: also comprise liquid nitrogen tank, liquid nitrogen dispatch valve, be used for carrying liquid nitrogen dispatch pipeline, liquid oxygen tank, the liquid oxygen dispatch valve of liquid nitrogen, being used for liquid oxygen dispatch pipeline to said liquid oxygen tank conveying liquid oxygen to the said tower of going up; One end of said liquid nitrogen dispatch pipeline is connected with the said tower of going up; The other end of said liquid nitrogen dispatch pipeline is connected with said liquid nitrogen tank, and said liquid nitrogen dispatch valve is located on the said liquid nitrogen dispatch pipeline, and an end of said liquid oxygen dispatch pipeline is connected with the evaporation side of said condenser/evaporator; The other end of said liquid oxygen dispatch pipeline is connected with said liquid oxygen tank, and said liquid oxygen dispatch valve is located on the said liquid oxygen dispatch pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103297364A CN102829605A (en) | 2012-09-08 | 2012-09-08 | Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103297364A CN102829605A (en) | 2012-09-08 | 2012-09-08 | Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling |
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| CN102829605A true CN102829605A (en) | 2012-12-19 |
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| CN2012103297364A Pending CN102829605A (en) | 2012-09-08 | 2012-09-08 | Air separation device for supplying cold energy for preparing liquid oxygen by utilizing liquid nitrogen backward filling |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759499A (en) * | 2014-01-13 | 2014-04-30 | 浙江海天气体有限公司 | Ultralow-energy-consumption nitrogen making device |
| CN106091575A (en) * | 2016-05-31 | 2016-11-09 | 浙江智海化工设备工程有限公司 | A kind of expanded air bypass amount being matched in external compression space division reduces device and reduction method |
| CN110662935A (en) * | 2017-05-31 | 2020-01-07 | 乔治洛德方法研究和开发液化空气有限公司 | Gas production system |
| CN112066643A (en) * | 2020-07-28 | 2020-12-11 | 上海加力气体有限公司 | Air separation process with reduced energy consumption |
| CN113063263A (en) * | 2021-04-29 | 2021-07-02 | 开封迪尔空分实业有限公司 | Air separation method for preparing liquid oxygen by using liquid nitrogen |
| CN113091401A (en) * | 2021-04-29 | 2021-07-09 | 开封迪尔空分实业有限公司 | Liquid air separation device for preparing liquid oxygen by using liquid nitrogen |
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| CN1616909A (en) * | 2004-10-28 | 2005-05-18 | 苏州市兴鲁空分设备科技发展有限公司 | Method and device for separating air |
| CN200958887Y (en) * | 2006-10-10 | 2007-10-10 | 山西新临钢钢铁有限公司 | Cryogenic oxygen-nitrogen liquid converter |
| CN101050913A (en) * | 2006-04-05 | 2007-10-10 | 气体产品与化学公司 | Air separation method using cool extracted from liquefied natural gas for producing liquid oxygen |
| CN202792810U (en) * | 2012-09-08 | 2013-03-13 | 浙江海天气体有限公司 | Air separation device for preparing liquid oxygen by cold energy provided by backflow of liquid nitrogen |
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2012
- 2012-09-08 CN CN2012103297364A patent/CN102829605A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1616909A (en) * | 2004-10-28 | 2005-05-18 | 苏州市兴鲁空分设备科技发展有限公司 | Method and device for separating air |
| CN101050913A (en) * | 2006-04-05 | 2007-10-10 | 气体产品与化学公司 | Air separation method using cool extracted from liquefied natural gas for producing liquid oxygen |
| CN200958887Y (en) * | 2006-10-10 | 2007-10-10 | 山西新临钢钢铁有限公司 | Cryogenic oxygen-nitrogen liquid converter |
| CN202792810U (en) * | 2012-09-08 | 2013-03-13 | 浙江海天气体有限公司 | Air separation device for preparing liquid oxygen by cold energy provided by backflow of liquid nitrogen |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759499A (en) * | 2014-01-13 | 2014-04-30 | 浙江海天气体有限公司 | Ultralow-energy-consumption nitrogen making device |
| CN103759499B (en) * | 2014-01-13 | 2016-05-25 | 浙江海天气体有限公司 | A kind of super low energy consumption nitrogen-making device |
| CN106091575A (en) * | 2016-05-31 | 2016-11-09 | 浙江智海化工设备工程有限公司 | A kind of expanded air bypass amount being matched in external compression space division reduces device and reduction method |
| CN106091575B (en) * | 2016-05-31 | 2018-08-28 | 浙江智海化工设备工程有限公司 | It is a kind of being matched in external compression space division expanded air bypass amount reduce device and reduce method |
| CN110662935A (en) * | 2017-05-31 | 2020-01-07 | 乔治洛德方法研究和开发液化空气有限公司 | Gas production system |
| CN112066643A (en) * | 2020-07-28 | 2020-12-11 | 上海加力气体有限公司 | Air separation process with reduced energy consumption |
| CN113063263A (en) * | 2021-04-29 | 2021-07-02 | 开封迪尔空分实业有限公司 | Air separation method for preparing liquid oxygen by using liquid nitrogen |
| CN113091401A (en) * | 2021-04-29 | 2021-07-09 | 开封迪尔空分实业有限公司 | Liquid air separation device for preparing liquid oxygen by using liquid nitrogen |
| CN113091401B (en) * | 2021-04-29 | 2022-05-31 | 开封迪尔空分实业有限公司 | Liquid air separation device for preparing liquid oxygen by using liquid nitrogen |
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Application publication date: 20121219 |