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Combined high pressure nitrogen purification equipment

A high-pressure nitrogen, combined technology, applied in the direction of nitrogen purification/separation, can solve the problems of increasing the burden of the post-stage booster equipment, unable to meet the nitrogen purity requirements, and low output nitrogen pressure, and achieves convenient transportation and equipment. Stable, short production cycle effect

Active Publication Date: 2017-08-25
SHANDONG HENGYE GASOLINEEUM NEW TECH APPL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Through the above comparison, it can be seen that the purity of nitrogen produced by membrane separation nitrogen production equipment is generally 95%, which cannot meet the nitrogen purity requirements of places that are very sensitive to oxygen concentration.
If you want to adjust the purity to more than 99%, the equipment manufacturing cost is high
[0007] The nitrogen purity produced by ordinary PSA pressure swing adsorption nitrogen production equipment can reach more than 99%, but the nitrogen pressure produced by it is low, which increases the burden on the post-stage booster equipment
Originally required a large amount of compressed air

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A combined high-pressure nitrogen purification equipment, including a membrane separation nitrogen production unit and a high-pressure PSA pressure swing adsorption nitrogen production purification unit connected to it through a high-pressure hose; The low-purity nitrogen tank 14, the pressure swing adsorption tower 15 and the high-purity nitrogen tank 18, the pressure swing adsorption tower 15 are two in parallel; the nitrogen inlet of the membrane separation nitrogen production unit is connected with the low-purity nitrogen tank 14, the low-purity nitrogen tank 14 outlets are connected to the low-purity nitrogen inlet pipeline of the PSA tower 15, and the high-purity nitrogen pipeline of the PSA tower 15 is connected to the high-purity nitrogen tank 18, and the outlet of the high-purity nitrogen tank 18 is provided with an automatic emptying system; the entire high-pressure The PSA pressure swing adsorption nitrogen production purification unit is automatically control...

Embodiment 2

[0037]The pressure swing adsorption tower in embodiment 1 is selected as the PSA pressure swing adsorption tower for high-pressure nitrogen purification, which includes two parallel pressure swing adsorption towers, that is, adsorption tower A 1 and adsorption tower B 2, and each pressure swing adsorption tower includes a tower The body and the low-purity nitrogen pipeline and oxygen-enriched exhaust pipeline connected to the bottom, the high-purity nitrogen pipeline connected to the top, and the pressure equalization pipeline connected between the two towers. The inner chamber of each pressure swing adsorption tower is separated by 8 sieve plates It consists of upper and lower parts, wherein the upper part is filled with molecular sieves 7 and the lower part is filled with ceramic balls 9; the top and bottom of the inner chamber of the PSA tower are respectively provided with an upper damping disperser 12 and a lower damping disperser 10, wherein the upper damping disperser Th...

Embodiment 3

[0039] On the basis of embodiment 2, the low-purity nitrogen pipelines and the oxygen-enriched evacuation pipelines of the two pressure swing adsorption towers are connected in parallel respectively and share the same pipeline with the lower damping disperser 10, and the high-purity nitrogen gas of the two pressure swing adsorption towers The pipelines are connected in parallel and serve as pressure equalization pipelines at the same time; the low-purity nitrogen pipeline, the oxygen-enriched exhaust pipeline and the high-purity nitrogen pipeline are respectively provided with control valves, namely high-purity nitrogen exhaust control valve 3, low-purity nitrogen intake control valve 4, Oxygen-enriched gas evacuation control valve 5.

[0040] The operating process of the PSA pressure swing adsorption tower for the medium and high pressure nitrogen purification in Examples 2 and 3 is divided into four stages, and the nitrogen purification is realized with this cycle work, speci...

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Abstract

The invention discloses combined high pressure nitrogen purification equipment, which comprises a membrane separation nitrogen producing unit and a high pressure PSA (pressure swing adsorption) nitrogen producing and purification unit in pipeline connection with the membrane separation nitrogen producing unit. The high pressure PSA nitrogen producing and purification unit consists of two pressure-swing absorbers in parallel connection. The inner cavity of each pressure-swing absorber is separated into an upper part and a lower part by a sieve plate, wherein the upper part is filled with a molecular sieve and the lower part is filled with porcelain balls. The top and / or bottom of the pressure-swing absorber inner cavity is provided with a gas disperser, wherein the top disperser is connected to a pressure equalizing pipeline, and the bottom disperser is buried in the porcelain balls and is connected to a low purity nitrogen pipeline. The invention makes full use of the characteristic of preparation of high purity nitrogen by the pressure swing adsorption process, purifies the nitrogen produced by membrane separation nitrogen producing equipment at a pressure of about 1.7MPa and a purity of 90%-95% to nitrogen with purity of more than 99%. The whole equipment has the advantages of compact structure, reasonable layout, strong operational reliability and high safety.

Description

technical field [0001] The invention relates to the field of high-pressure high-purity nitrogen production equipment, in particular to a combined high-pressure nitrogen purification equipment. Background technique [0002] Existing nitrogen production equipment includes membrane separation nitrogen production equipment and low-pressure PSA pressure swing adsorption nitrogen production. Membrane separation nitrogen production equipment generally consists of an air compressor, oxygen and nitrogen separation equipment and two parts. The core component of the air compressor is a screw compressor, which pressurizes the air and sends it to the oxygen and nitrogen separation equipment. Oxygen and nitrogen are separated by using the characteristics of the hollow fiber membrane to obtain nitrogen with higher pressure. PSA pressure swing adsorption nitrogen production equipment generally consists of two parts: air compressor and PSA pressure swing adsorption nitrogen production equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/04
Inventor 王玉军孟巧玲孔令猛王涛吴洪波董玉欣王如德方绍杰李建奎郑富林
Owner SHANDONG HENGYE GASOLINEEUM NEW TECH APPL