CN109422254A

CN109422254A - A method of obtaining rare gas

Info

Publication number: CN109422254A
Application number: CN201710771133.2A
Authority: CN
Inventors: 周玉洁; 周宏峰
Original assignee: Zhenjiang Yan Yan Gas Co Ltd
Current assignee: Zhenjiang Yan Yan Gas Co Ltd
Priority date: 2017-08-26
Filing date: 2017-08-26
Publication date: 2019-03-05

Abstract

The present invention is mainly the method that a kind of pair of admixture of gas separates and obtain rare gas, i.e., will specify the air-flow preposition decomposable process in gas of the abundant step of the fraction containing rare gas for being used for decomposing.Fraction may be, for example, process gas rich in rare gas or the gas that is loaded in technical process with rare gas.Through the invention, the rare gas content in the air-flow for being transported to air separation equipment increases and improves the yield of the rare gas in air separation process through this.

Description

A method of obtaining rare gas

Technical field

The present invention relates to a kind of methods for obtaining rare gas.

Background technique

Oxygen, nitrogen, argon gas and most of other rare gas can be obtained by decomposing air.It is possible thereby to for example exist In modernization, air separation equipment that wherein handle about 200000m3/h air, in addition to about 160000m3 nitrogen and The argon gas of about 1800m3, the neon of 3m3, the helium of 1m3, the Krypton of 0.2m3 and 0.016m3 are also obtained outside the oxygen of 38000m3 Xenon.

This method be proved to be suitable and in commercial quantity obtain all over the world at present using.But it is dissatisfactory It is that the yield of rare gas is only a small amount of in the case where conventional air is decomposed.Therefore it is at least answered when producing helium with this It is right, replace air and will be enriched in the natural gas of helium for decomposition method.This method ratio is more economical from air production, but is only providing It is workable in the area of corresponding natural gas.

Summary of the invention

It is mixed with the fraction rich in rare gas with aeriferous air-flow, keeps the rare gas content in air-flow opposite It is significantly improved in normal air.In the case where decomposing compared to regular air, rare gas significantly can be economically used through this The separation method of body.It especially ought wherein generate the process gas flow rich in rare gas or there is the natural gas for being rich in rare gas The method process of body such as natural gas or biogas, when being combined with locality or with the air separation equipment that locality is located apart from, then originally The method of invention has tremendous economic meaning.Method of the invention in this case shows additional in air separation equipment for the first time Ground installation rare gas decomposer is economically correctly, because the yield of rare gas and thus can be improved substantially Improve its economic utilization.

In order to load rare gas, contact fraction with material heated, containing rare gas, wherein will Rare gas, which is at least partly isolated, to be used together the fraction and exports it.Here, as the material containing rare gas Consider various materials, wherein rare gas such as helium, neon, argon gas, Krypton or xenon is absorbed, dissolves or is mixed into, and can be with It is separated from the material.Assign the material a kind of temperature, a part of at least rare gas is separated at such a temperature Come and is exported by the fraction.The purity and quality of processed material are further improved through this process, especially by The vaporous substances of others are often also isolated in heating in addition to rare gas other than, such as water vapour or carbon dioxide and by the portion Divide air-flow export.It is used in the air-flow that gas decomposes with the fraction loaded with rare gas is transported to, so as to Obtain rare gas.In order to which gas decomposition can also use already existing air separation equipment.If be suitble to, and with accordingly Rare gas decomposer equipment air separation equipment not at the scene, but spatially far from the carry out fraction plus Fraction can also be encased in container and transport in air separation equipment, be entered into air herein by the place of load In the inlet air flow of resolving device.Thus the inlet air flow and therefore phase of the air separation equipment are enriched with rare gas The yield of rare gas is improved for the decomposition of pure air.

Specific embodiment

Below with reference to embodiment, the present invention is further illustrated.

It obtains in air separation equipment for the required oxygen that burns.It will be through raw material feed channel in air separation equipment The unstripped gas of introducing resolves into its ingredient in a manner known in itself, is discharged immediately through pipeline.To be used to isolate it is vaporous at The device divided is preposition in fuel delivery components, by the heating of fuel that the rare gas contained in fuel is (same such as oxygen Gas and water) desorption, and the fraction for being desorbed gas is taken out of.For the heating of fuel, or by the fuel from it It is heated before being input to desorption apparatus, or heating gas for desorption.The material part gas abundant through desorbing It flows and is sufficiently mixed with the part stream of desorption gas, wherein material is no or only desorbs on a small scale and uniform, use is consequently formed The air-flow of rare gas and the load of other materials, it is exported in raw material feed channel.Thus by required fresh air through new Fresh another pipeline of air delivery introduces.The preliminary clearning stage is integrated in such a way that itself is conventional in raw material feed channel, at this stage The middle water that will be desorbed out and the other ingredients being desorbed out, such as harmful substance, dust etc. are from remaining parsing gas It separates.Dried unstripped gas is imported into the air separation equipment for gas separation through raw material feed channel.Because should Unstripped gas in air separation equipment is introduced into since desorption process has rare gas content more higher than general air, Significant a greater amount of rare gas can be obtained in air separation equipment.In addition, oxygen content is increased due to desorption process, by Considerably higher raw material Gas content compared with air can be imported into combustion apparatus by this as oxidant.

Claims

1. a kind of separate the method for obtaining rare gas by admixture of gas, in the method by the component containing air gas Air-flow is put into the method for resolving into its ingredient in gas decomposer, which is characterized in that by the air-flow defeated It is sufficiently mixed before being sent to gas decomposer with the fraction containing rare gas, in order to make the portion with rare gas load Air-flow is divided to contact with material heated, containing rare gas, wherein the rare gas is at least partially separated out simultaneously It is exported with fraction.

2. the method according to claim 1, wherein the air gas obtained in gas decomposer is mixed Enter in the fraction to before load.

3. according to the method described in claim 2, it is characterized in that, being used as the material containing rare gas natural or artificial Raw material, such as coal, ore, petroleum, natural gas, biogas or the final product or intermediate product obtained by industrial process.