Nitrogen Generator for the New Materials Industry

1. Product Introduction of Nitrogen Generators in the New Materials Industry
Pressure Swing Adsorption (PSA) nitrogen generators refer to nitrogen production equipment designed and manufactured using physical methods based on PSA technology, with clean compressed air as the raw material. These generators use high-quality imported carbon molecular sieve (CMS) as the adsorbent and operate on the principle of pressure swing adsorption at room temperature to separate air and produce nitrogen of varying purities. Typically, two adsorption towers are used in parallel, controlled by imported PLCs and pneumatic valves for automatic operation. The process alternates between pressurization for adsorption and depressurization for regeneration, achieving nitrogen-oxygen separation and yielding nitrogen of the desired purity.
2. Working Principle of Nitrogen Generators in the New Materials Industry
Carbon molecular sieve can simultaneously adsorb oxygen and nitrogen from the air, with adsorption capacity increasing as pressure rises. At the same pressure, there is no significant difference in the equilibrium adsorption capacity of oxygen and nitrogen. Therefore, effective separation of oxygen and nitrogen is difficult to achieve solely through pressure changes. However, by considering adsorption rates, the adsorption characteristics of oxygen and nitrogen can be effectively distinguished. Oxygen molecules are smaller in diameter than nitrogen molecules, resulting in a diffusion rate hundreds of times faster. Thus, carbon molecular sieve adsorbs oxygen rapidly, reaching over 90% within about one minute. At this point, nitrogen adsorption is only around 5%. Given that oxygen and nitrogen account for 21% and 78% of air, respectively, the adsorbed molecules are predominantly oxygen. The remaining nitrogen molecules are enriched at one end of the adsorber, forming product nitrogen that enters the nitrogen process buffer tank.

3. Equipment Features of PSA Nitrogen Generators in the New Materials Industry
1) Convenient and Fast Nitrogen Production:
A unique gas distributor ensures even airflow distribution, efficiently utilizing the adsorption capacity of the carbon molecular sieve. Qualified product nitrogen can be provided in about 20 minutes.
2) Ease of Use:
The equipment features a compact, integrated skid-mounted design with a small footprint, requiring no infrastructure investment. It only needs to be connected to a power source to produce nitrogen on-site, with adjustable and stable purity, flow rate, and pressure to meet diverse customer needs.
3) More Economical Than Other Nitrogen Supply Methods:
PSA technology is a simple nitrogen production method that uses air as the raw material, with energy consumption limited to the electricity used by the air compressor. It offers advantages such as low operating costs, low energy consumption, and high efficiency.
4) Automated Operation Through Mechatronic Design:
Imported PLCs enable fully automatic operation, with adjustable nitrogen flow, pressure, and purity displayed continuously, allowing for unmanned operation.
5) Wide Range of Applications:
Suitable for protective atmospheres in metal heat treatment, process gases in chemical production, nitrogen purging and explosion prevention in various tanks and pipelines, oxidation and explosion prevention in rubber and plastic product manufacturing, nitrogen flushing for oxidation prevention, preservation, and extended shelf life in food packaging, cover gas in beverage purification and blending processes, nitrogen packaging and container nitrogen purging in pharmaceuticals, and protective atmospheres in soldering and reflow processes for electronic components and semiconductor production.
6) Technical Specifications:
Flow Rate: 5-3000 Nm³/h
Purity: 95%-99.9995% (oxygen-free; high-purity nitrogen is produced using a two-step method)
Dew Point: ≤ -40°C to -70°C
Pressure: Adjustable, ≤ 0.1-0.8 MPa
4. System Applications
Specialized nitrogen generators for the oil and natural gas industry are suitable for nitrogen protection, transportation, coverage, replacement, emergency rescue, maintenance, and nitrogen injection for enhanced oil recovery in onshore, coastal, and deep-sea oil and gas extraction. They feature high safety, strong adaptability, and continuous production.
Specialized nitrogen generators for the chemical industry are applicable to petrochemicals, coal chemicals, salt chemicals, natural gas chemicals, fine chemicals, new materials, and their derivative processing industries. Nitrogen is primarily used for coverage, purging, replacement, cleaning, pressure conveyance, chemical reaction agitation, synthetic fiber production protection, and nitrogen flushing.
Specialized nitrogen generators for the metallurgical industry are suitable for heat treatment, bright annealing, protective heating, powder metallurgy, copper and aluminum processing, magnetic material sintering, precious metal processing, and bearing production. They offer high purity, continuous production, and in some processes, nitrogen with a certain hydrogen content to enhance brightness.
Specialized nitrogen generators for the coal mining industry are used for fire prevention and extinguishing, as well as gas and coal seam dilution. Available in three configurations: fixed ground-based, mobile ground-based, and underground mobile, they fully meet nitrogen demands under various working conditions.
Specialized nitrogen generators for the rubber and tire industry are suitable for nitrogen protection and molding during rubber and tire production and vulcanization. Particularly in all-steel radial tire production, nitrogen vulcanization is gradually replacing steam vulcanization. These generators feature high nitrogen purity, continuous production, and relatively high nitrogen pressure.
Specialized nitrogen generators for the food industry are used for green grain storage, nitrogen-flushed food packaging, vegetable preservation, and wine sealing (canning) and storage.
Explosion-proof nitrogen generators are suitable for chemical, oil, and natural gas industries where explosion-proof equipment is required.
Specialized nitrogen generators for the pharmaceutical industry are mainly used in drug production, storage, sealing, and packaging.
Specialized nitrogen generators for the electronics industry are suitable for semiconductor production and packaging, electronic component manufacturing (SMT), LED and LCD display production, and lithium battery manufacturing. They feature high purity, compact size, low noise, and low energy consumption.
Containerized nitrogen generators are suitable for oil, natural gas, chemical, and other related industries, offering strong adaptability and mobility.
Mobile nitrogen generation vehicles are used in oil and natural gas extraction, pipeline purging, replacement, emergency rescue, and dilution of flammable gases and liquids. Available in low, medium, and high-pressure series, they are highly mobile and operable on the move.
Automotive tire nitrogen inflators are primarily used in 4S shops and auto repair facilities for tire nitrogen inflation, which extends tire life, reduces noise, and lowers fuel consumption.