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Low-temperature separation and extraction system and method of pure neon

An extraction system and low-temperature technology, applied in the field of low-temperature gas separation, can solve the problems of long process path, difficult operation, complex equipment, etc., and achieve the effect of short process path, high safety and simple equipment

Inactive Publication Date: 2017-08-08
ZHEJIANG XIN RUI AIR SEPARATION PLANT CO LTD
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Problems solved by technology

However, the existing preparation method has a long process path, complex equipment, relatively low extraction rate, high difficulty in operation, and high safety requirements in the high-temperature process, which is not conducive to production

Method used

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  • Low-temperature separation and extraction system and method of pure neon

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Embodiment

[0047] The low-temperature separation and extraction system for pure neon gas of the present invention includes a raw material buffer pressurization unit, a condensation separation nitrogen removal unit, an adsorption nitrogen removal unit, and a neon purification unit sequentially connected through pipelines.

[0048] Such as figure 1 As shown, the raw material buffer pressurization unit includes a low-pressure buffer tank 11 , a raw material compressor 12 and a medium-pressure buffer tank 13 connected in sequence through pipelines.

[0049] The mixture of neon, helium, nitrogen and hydrogen from the air separation unit is decompressed (10KPa(G)~50KPa(G)) and stored in the low-pressure buffer tank 11. The low-pressure buffer tank 11 also receives nitrogen from the condensation separation The gas separated from the top of the secondary separator 22 in the unit, the two parts of the gas are mixed and compressed to 4.0MPa (G) by the raw material compressor 12, and then enter the...

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Abstract

The invention relates to a low-temperature separation and extraction system and a low-temperature separation and extraction method of pure neon. The system comprises a raw material storage and pressurization unit, a condensation separation denitrification unit, an adsorption denitrification unit and a neon purification unit, wherein the raw material storage and pressurization unit, the condensation separation denitrification unit, the adsorption denitrification unit and the neon purification unit are connected in sequence by virtue of pipelines; the raw material storage and pressurization unit comprises a low-pressure buffer tank, a raw material compressor and a medium-pressure buffer tank which communicate in sequence by virtue of pipelines; the condensation separation denitrification unit comprises a first-stage separator and a second-stage separator which communicate in sequence by virtue of a pipeline, and a first heat exchanger is further arranged between the first-stage separator and the medium-pressure buffer tank of the raw material storage and pressurization unit; and the adsorption denitrification unit comprises a first denitrification adsorber and a second denitrification adsorber which communicate in parallel, and the first denitrification adsorber and the second denitrification adsorber are respectively arranged in a second vacuum insulation container and a third vacuum insulation container.

Description

technical field [0001] The invention relates to a system and method for low-temperature separation and extraction of pure neon from neon, helium, nitrogen and hydrogen mixed gas produced by an air separation unit, and belongs to the technical field of low-temperature gas separation. Background technique [0002] At present, neon gas is widely used in various fields such as optoelectronics and high-energy physics. [0003] Neon mainly comes from the air, and the existing production process all utilizes an air separation unit to extract from the air. The steps for extracting neon include: 1. The air separation unit produces a mixture of neon, helium, nitrogen, and hydrogen; 2. Combustion method removes hydrogen in the mixed gas to produce crude neon and helium mixed gas containing neon, helium and nitrogen; 3. Removes crude neon and nitrogen in helium to produce pure neon and helium mixed gas; 4. Removes helium to produce pure Neon products. However, the existing preparation...

Claims

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Application Information

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IPC IPC(8): F25J3/00
CPCF25J3/028F25J3/029F25J3/08F25J2205/04F25J2205/40F25J2205/60F25J2210/04F25J2210/42F25J2215/30F25J2215/32F25J2230/30F25J2245/02F25J2270/904
Inventor 沈浩
Owner ZHEJIANG XIN RUI AIR SEPARATION PLANT CO LTD
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