CS234861B1 - A method of producing pure argon and a device for making it - Google Patents

Abstract

The invention solves the technical problem of producing pure argon. The essence of the invention is that liquid argon is converted into solid argon, from which oxygen and nitrogen are separated, and the solid argon, after heating, is supplied as pure for consumption. The invention can be used in all liquid or gaseous argon and liquid nitrogen production plants and especially in metallurgical plants in the production of special steels, where argon is used. The method and device according to the invention can also be used in the chemical industry.

Description

234861

The present invention relates to a process for the production of pure-geranium and to the production thereof. The production of argon in air separation plants is characterized by stringent requirements for oxygen and nitrogen content in the argon boiling. The increased oxygen and nitrogen content in argon causes an excessive occurrence of oxygen and nitrogen in the special steels bubbled with the armonol, which adversely affects the quality of the steel. Welding devices with a protective atmosphere require higher purity argon. Pure argon is becoming increasingly important in metallurgical processes as an inert atmosphere to increase product quality and purity. Argon is also used as a shielding gas in analytical and chemo-preparative work.

To further purify crude argon oxygen, a purification station has been used in which oxygen from argon is combusted by the catalyst in the presence of pure water, which is removed in the separator and the drying device.

Zeolite adsorbers are also used to remove oxygen from the crude arsenic.

The removal of nitrogen from argon is accomplished by cooling it and additionally rectifying it in the columns.

A disadvantage of purifying argon with hydrogen by the catalyst is the investment and energy demand, the need to manufacture, or supply pure hydrogen, the density of the raw-barge and hydrogen compression, the need for rare metal fabrication catalysts, and the need for a drying agent. A major disadvantage is the non-safety in the manufacture, compression and handling of flammable hydrogen in the oxygen production space.

The disadvantage of removing oxygen from the arginine in zeolite adsorbers is the energy demand of this method of cleaning and the necessity of obtaining special types of zeolites in the adsorbers.

Adsorbers must be made of special materials as they work at extremely low and high temperatures.

The disadvantage of removing nitrogen from the argon by additional rectification is mainly the investment and energy demands of this process.

The disadvantages of the present invention are avoided and overcome by the processes for producing pure argon and the apparatus according to the invention. In the present invention, in a device equipped with a liquid argon reservoir which is loaded in the reservoir with liquid nitrogen, the crude argon is reacted with turns into solid argon; the liquid or gaseous oxygen and nitrogen are separated from the solid argon and discharged, and the solid argon is heated to a liquid or gaseous pure carbone which is discharged to consumption. The heated argon is effected, for example, by draining the liquid nitrogen from the reservoir.

The apparatus for producing pure argon according to the invention consists of a reservoir of liquid air, which is inserted into a liquid nitrogen reservoir, whereby a liquid nitrogen reservoir is connected to a valve of liquid nitrogen supply and a valve of liquid nitrogen and is connected to the reservoir by liquid argon. the raw argon feed valve and the pure argon outlet valve and the liquid or gaseous oxygen and nitrogen outlet valves at the top of the liquid argon reservoir. Advantages of the invention over the existing prior art, compared to the conventional post-purification of crude argon, are that it is possible to substantially reduce the original oxygen and nitrogen content of the raw material by both liquid and gaseous, which has a beneficial effect on the quality of the produced argon-composite bubbles.

A great advantage is the low investment and energy intensity, with the liquid argon and nitrogen reservoirs being made of conventional aluminum tubes, which are interposed and the air separation devices are generally produced in addition to the raw argon liquid which is stored in liquid nitrogen, also stored in containers, usable by the present invention. The advantage is also the possibility of more intensive production of crude argon even with a higher content of oxygen and nitrogen and thus the possibility of supplying a larger amount of pure argon.

Advantages include the ease of handling, which can be done manually by individual valves, or by automatic control, and the entire cycle can also be provided by a processor. An exemplary embodiment of the method and apparatus of the invention is illustrated in the accompanying drawing. The apparatus is provided with liquid argon 2, which is inserted into the reservoir 3 with liquid nitrogen 4, both of which are thermally insulated in the insulating housing 6 with liquid nitrogen. the valve 7 is discharged through the valve 8, wherein the degassing and gasification of the reservoir 3 is effected by the valve 9. The liquid raw argon 2 is filled into the reservoir 1 by a valve 10 and the pure liquid or gaseous argon is exhausted by the valve 11, whereby the degassing and gasification of the reservoir 1 is made by a valve. 12.

The discharge of liquid oxygen and liquid nitrogen from argon is made by valves 13, 14. The process of filling and emptying the container 1 with liquid argon 2 is controlled and regulated according to the level indicator 13.

The flow and emptying of the reservoir 3 with liquid nitrogen is controlled by the level indicator 16.

The course of the conversion of the liquid state of the solid 2 to the solid state of argon 17 is controlled and regulated by the thermometer 18.

Claims (2)

SUBJECT 1. A process for producing pure argon, characterized in that the liquid or gaseous crude argon is converted to solid argon by cooling, liquid or gaseous oxygen and nitrogen are separated and discharged from solid argon, and solid argon is converted by heating to liquid or gaseous pure argon. to consumption. Device for producing pure argon according to claim 1, characterized in that it consists of a reservoir [1] with liquid argon (2), which is inserted into the reservoir (3) of ynAlez with liquid nitrogen (4j), and on the reservoir (3). the liquid nitrogen (4) is connected to the liquid nitrogen inlet valve (7) and the liquid nitrogen outlet valve (8j) and the raw argon (2) tank (1) is connected with the raw argon inlet valve (10) and the pure outlet valve (11) argon and at the top of the liquid argon cartridge (1) there are oxygen gas and nitrogen outlet valves (12) and liquid oxygen and nitrogen outlet valves (13) and (14).