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Back flow Pure Nitrogen Generation Plant Carbon steel for Protect Gas

Back flow Pure Nitrogen Generation Plant Carbon steel for Protect Gas

Brand Name : Hangyang
Model Number : KDN
Certification : CE/ASEM/GB
Place of Origin : China
MOQ : 1 set
Price : according to actual requirement
Supply Ability : according to actual requirement
Delivery Time : according to actual requirement
Packaging Details : wooden case, nude packing, container
Application : Glass, Oil and Gas Field, Machinery & Construction,Metallurgy
Usage : Produce nitrogen
Material : Carbon steel, aluminum, stainless steel
Purity : ≤5ppm(O2)
Type : KDN
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Nitrogen Generation Plant 350 Nm3/h KDN-350 Backflow Pure Generator Protect Gas


Standard Products for the Nitrogen Generation KDN series







GAN flow






LIN flow











GAN pressure






LIN pressure






Typical Product:350 Nm3/h KDN-350 Back Flow Nitrogen Generation

Output, purity and pressure

Flow (Nm3/h)


Pressure MPa(G)


350 (g)




This plant employs a expansion turbine process in which the air is purified by molecular sieve, nitrogen is produced by means of single column with expansion accomplished through backflow. After the feed air is cleaned of dust and mechanical impurities in air filter, it is compressed in air compressor. The compressed air is then fed into air pre-cooling system after it is cooled, it becomes saturated. The saturated and compressed air flows into switched molecular sieve adsorbers where such hydrocarbons as H2O, CO2 and C2H2 are adsorbed from the air. A small part of purified process air is drawn out to be used as instrument air; the remainder is fed into main heat exchanger, and then the cooled air is fed into the bottom of nitrogen column for participation in rectification. The high purity nitrogen gas and liquid nitrogen are then obtained at the top of nitrogen column while the saturated and oxygen-rich liquid air at the bottom of column is throttled into the evaporation side of condenser evaporator to condense the nitrogen gas at the top of column. Oxygen-rich liquid air at the evaporation side of condenser evaporator is heated and vapored to be saturated gas by nitrogen gas at the top of column, and then it is drawn out and into cold end of main heat exchanger, after rewarming, it is drawn out and into turbo-expander to be expanded and refrigerated. Expanded oxygen-rich liquid air enters main heat exchanger to be rewarmed to normal temperature and to be fed out of cold box; partial gas is to be regeneration gas for molecular sieve adsorber, the rest is blowed off. The nitrogen gas is drawn out of the top of nitrogen column. The nitrogen gas flows out of cold box to the client after it is reheated in main heat exchanger to a normal temperature. In order to prevent hydrocarbon from accumulating in condenser evaporator, a small stream of liquid drawn from oxygen-rich liquid air evaporation side is discharged as waste liquid.


1. Freezing

2. Electronics & Semi Conductors

3. Filling Gas

4. Sealing Gas

5. Inert Gas

6. Glass

7. Ripening Gases for Fruits

Competitive Advantage:

1. The advanced software introduced from abroad for calculation of performance is used to analyze the optimization of process adopted by this plant.

2. The more advanced program developed by Hangyang itself on the basis of rectification design module from Linde for rectification calculation and verified in many air separation plants is applied to ensure the

price proportion of optimum technical/economical figures to fine performance.

3. Our company has the strong ability for supporting, and steady after-sale service

4. Powerful manufacturing capacity

5. Quick delivery

6. Long service life

Product Tags:

industrial nitrogen generator


liquid nitrogen plants

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