info@chemxin.com           +86-20-39185057
chemxin logo
The article body
Comparison of Different Nitrogen Production Methods
Published:2018-06-12 09:18:33    Text Size:【BIG】【MEDIUM】【SMALL

Oxygen has a wide range of uses in industrial production and daily life and is contained in the air

twenty one% (Volume concentration) of oxygen, is the cheapest raw materials for oxygen, so oxygen are generally pass made of air separation system.


Air separation oxygen main process:

1. Cryogenic separation process:

2. Pressure swing adsorption process(PSA):

3. Membrane separation process:


Item

Cryogenic separation process

Membrane separation process

PSA process

Separation principle

The air liquefied, according to different boiling points of oxygen and nitrogen to achieve separation.

According to different gas molecules in the film dissolved diffusion performance differences to achieve separation.

Pressurized adsorption, decompression desorption, through the oxygen and nitrogen adsorption capacity to achieve separation.

Device features

Complex process, more equipment, large investment.

Process is simple, less equipment, less controlled valves, larger investment.

Simple process, less equipment, more control doors, investment province.

Process

-160 ~ -190 low temperature operation

Room temperature operation

Room temperature operation

Operating

Start a long time, usually 15 to 40 hours, you must continue to run, can not run intermittently, a brief shutdown, recovery conditions for a long time.

Start-up time is short, usually in the general 20min, continuous operation, but also intermittent operation.

Start time is short, usually 30min, continuous operation, but also intermittent operation.

Maintain

Complex equipment structure, high precision, maintenance and technical difficulties, high maintenance costs.

Equipment structure is simple, low maintenance technical difficulties, high maintenance costs.

Equipment structure is simple, low maintenance technical difficulties, low maintenance costs.

Installation

Covers a large area, high requirements of plant and foundation, high project cost. Long installation period, technical difficulty, installation costs

Use high.

Small footprint, no special plant requirements, low cost. Short installation cycle, low installation costs.

Small footprint, no special plant requirements, low cost. Short installation cycle, low installation costs.

Safety

Operating at ultra-low temperature and high pressure may result in the local accumulation of hydrocarbons and the possibility of explosion

Operating at room temperature under higher pressure will not result in the local accumulation of hydrocarbons.

Operating at room temperature and pressure, will not cause the local accumulation of hydrocarbons.

Adjustability

Gas product output, purity is not adjustable, flexibility is poor

Gas product output, purity adjustable, better flexibility.

Gas product output, purity adjustable, better flexibility.

Search
下一篇文章
Copyright 2016 CHEMXIN Network Studio All Rights Reserved 粤ICP备16046434号-1
Contact Us
Contact Us

  • Guangzhou Chemxin Environmental Material Co.,Ltd
  • Add : Room 401, Changshanghui Building, No.31 Shengxing Street,
  • Panyu District, Guangzhou city, Guangdong province, 511400 China
  • Tel : +86-20-39185057  
  • Fax : +86-20-31134323
  • Email : info@chemxin.com
  • Call me!

ICP16046434-1