PSA Nitrogen Generator

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PSA Nitrogen Generator
Nitrogen Generator

PSA Nitrogen Generator

HBFD Series

PSA nitrogen generator is an automatic equipment which uses high-quality carbon molecular sieve as adsorbent, employing pressure swing adsorption technology at ambient temperature to separate oxygen and nitrogen from compressed air, producing nitrogen gas with purity up to 99.5% (99%–99.999% optional). It features low energy consumption, stable performance, and fully automatic operation, widely used in electronics, food preservation, chemical processing, metallurgy, heat treatment, pharmaceutical and other industries requiring high-purity nitrogen.

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PSA Nitrogen Generator Overview

Pressure swing adsorption (PSA) nitrogen generator is an advanced gas separation equipment that uses high-quality, efficient carbon molecular sieve as the adsorbent. Operating on the principle of pressure swing adsorption at ambient temperature, it separates compressed air to continuously produce high-purity nitrogen gas.

The PSA nitrogen generator typically consists of two parallel adsorption towers controlled by a fully automated PLC control system. The system strictly follows a programmed sequence, alternating between pressurized adsorption and depressurization regeneration, to achieve nitrogen-oxygen separation and obtain the desired high-purity nitrogen.

Key Features

  • High purity output: Nitrogen purity 97%–99.999% adjustable to meet diverse application requirements
  • Fully automatic operation: Siemens PLC intelligent control, touch screen HMI, unattended operation
  • Energy efficient: Optimized air consumption ratio (waste ratio as low as 3:1 at 99.5% purity) for reduced operating costs
  • Reliable performance: Pneumatic angle seat valves with 2 million+ cycle life, imported solenoid valves
  • Compact design: Modular skid-mounted structure, minimal footprint, easy installation and maintenance
  • Remote monitoring: RS485/MODBUS communication interfaces for DCS integration

Applications

  • Electronics & semiconductor manufacturing
  • Food packaging & preservation
  • Chemical & petrochemical processing
  • Metallurgical heat treatment
  • Pharmaceutical & medical industries
  • Coal mining & fire prevention
  • Glass & metal fabrication
(Nitrogen Purity)
HBFD97 nitrogen generator nitrogen purity: 97%
ModelNitrogen production(Nm3/min)
Effective air
consumption
(DNmm)
Inlet pipe size
(DNmm)
Outlet pipe
diameter
LWH
(mm)
Host
HBFD97-20200.67DN15DN1512506001400
HBFD 97-30301.00DN 20DN1512506001850
HBFD 97-40401.33DN20DN251450 7001825
HBFD 97-50501.67DN25DN251150 11301900
HBFD 97-60602.00DN25DN401150 11301900
HBFD 97-80802.7DN32DN401750 8252090
HBFD 97-1001003.3DN32DN401800 8502420
HBFD 97-1201204.0DN40DN401800 850 2090
HBFD 97-1501505.0DN40DN401850 925 2100
HBFD 97-1801806.0DN50DN401850 9252390
HBFD 97-2002006.7DN50DN402000 9502350
HBFD 97-2502508.3DN50DN502100 10002470
HBFD 97-30030010.0DN65DN502100 1100 2530
HBFD 97-35035011.7DN65DN502100 11002800
HBFD 97-40040013.3DN65DN802200 1150 2820
HBFD 97-50050016.7DN80DN802350 1400 2870
HBFD 97-60060020.0DN80DN802350 1450 3060
HBFD 97-80080026.7DN100DN802500 1500 3480
HBFD 97-1000100033.3DN 100DN 1002950 1600 3810
HBFD 97-1500150050.0DN125DN 1002950 1500 4620
HBFD 97-1800180060.0DN125DN 1002950 1800 4820
HBFD 97-2000200066.7DN125DN1002950 1800 5020
HBFD 97-2500250083.3DN200DN1005900 1500 4520
HBFD 97-30003000100.0DN250DN1255900 1500 4620

(Nitrogen Purity)

HBFD98 nitrogen generator nitrogen purity: 98%

ModelNitrogen production(Nm3/min)
Effective air
consumption
(DNmm)
Inlet pipe size
(DNmm)
Outlet pipe
diameter
LWH(mm)
Host
HBFD98-15150.55DN15DN1512506001400
HBFD98-20200.73DN 20DN151250 6001850
HBFD98-30301.10DN 20DN2514507001825
HBFD98-50501.83DN 25DN25115011301900
HBFD98-60602.2DN25DN4016508002070
HBFD98-80802.9DN32DN401750 8252210
HBFD98-1001003.7DN40DN4018008501940
HBFD98-1201204.4DN40DN401800 8502090
HBFD98-1501505.5DN40DN401850 9252240
HBFD98-1601605.9DN50DN4018509252390
HBFD98-1801806.6DN50DN4020009502350
HBFD98-2002007.3DN50DN402000 9502450
HBFD98-2502509.2DN50DN 502100 10002660
HBFD98-30030011.0DN65DN502100 11002680
HBFD98-35035012.8DN65DN502200 11502720
HBFD98-40040014.7DN65DN802250 12002750
HBFD98-45045016.5DN65DN802250 1200 2950
HBFD98-50050018.3DN80DN802350 14502870
HBFD98-60060022.0DN80DN80235014503160
HBFD98-70070025.7DN 100DN802500 15003330
HBFD98-80080029.3DN 100DN 80260016003610
HBFD98-90090033.0DN 100DN80295016003810
HBFD98-1000100036.7DN 100DN1002950 15004220
HBFD98-1200120044.0DN100DN 1002950 16004240
HBFD98-1500150055.0DN125DN100295016004840
HBFD98-1800180066.0DN 125DN1002950 18005020
HBFD98-2000200073.3DN200DN1005900 15004220
HBFD98-2500250091.7DN200DN1005900 16004340
HBFD98-30003000110.0DN250DN1255900 16004840

Working Principle

Pressure Swing Adsorption (PSA) nitrogen generation is an advanced gas separation technology that uses high-quality, efficient carbon molecular sieves as adsorbents. It operates on the principle of pressure swing adsorption at ambient temperatures to separate air and produce nitrogen gas with a purity of up to 99.5%. This process is based on the principle of "high-pressure oxygen absorption and normal pressure oxygen release".

PSA Nitrogen Generator System Diagram

PSA Nitrogen Generator System Diagram

Selective Adsorption Mechanism

The diffusion rates of oxygen and nitrogen molecules differ on the surface of the carbon molecular sieve. Smaller oxygen molecules (O₂) diffuse faster and enter the micropores of the efficient carbon molecular sieve more readily, while larger nitrogen molecules (N₂) diffuse more slowly and enter the micropores less frequently. This selective adsorption property leads to the enrichment of oxygen in the adsorbed phase and nitrogen in the gas phase within a short time, enabling effective separation of oxygen and nitrogen, ultimately resulting in gas-phase enriched nitrogen under PSA conditions.

Regeneration Process

After a period of time, the adsorption of oxygen reaches equilibrium. By lowering the pressure, the carbon molecular sieve releases the adsorbed oxygen — this is the regeneration process. Depending on the regeneration pressure, it can be classified into vacuum regeneration and normal pressure regeneration. Normal pressure regeneration facilitates thorough regeneration of the carbon molecular sieve, making it easier to obtain high-purity gas.

System Configuration

The PSA nitrogen generator is designed and manufactured based on pressure swing adsorption technology. Typically, it consists of two parallel adsorption towers controlled by a fully automated control system that strictly follows a specific programmable sequence, alternating between pressurized adsorption and depressurization regeneration to achieve nitrogen-oxygen separation and obtain the desired high-purity nitrogen gas.

The performance of the efficient carbon molecular sieve, particularly its dynamic adsorption capacity and separation factor, determines the quality of the nitrogen generator.

System Flow Description

Complete Process Flow:

  1. Air Compressor →
  2. Air Wet Tank (Buffer Tank) →
  3. C-class Compressed Air Filter →
  4. Refrigerated Compressed Air Dryer →
  5. T/A/D Class Compressed Air Filters →
  6. Micro-heat Regenerative Adsorption Dryer →
  7. T Class Compressed Air Filter →
  8. Air Process Tank (Dry Tank) →
  9. PSA Nitrogen Machine Host (Dual-tower adsorption system) →
  10. Nitrogen Process Tank (Unqualified → automatic exhaust; Qualified → output) →
  11. Nitrogen Storage Pressure Tank →
  12. Nitrogen Use Site

Key Points

  • Front-end Air Treatment: The quality of compressed air directly affects the service life of carbon molecular sieve and nitrogen purity. Multi-stage filtration and drying ensure oil-free, dust-free compressed air entering the adsorption towers.
  • Automatic Exhaust of Unqualified Nitrogen: A nitrogen analyzer continuously monitors output purity. When purity is below standard, a pneumatic valve automatically discharges unqualified nitrogen to atmosphere. When purity meets requirements, qualified nitrogen is delivered to the user’s site.
  • Buffer Storage: The nitrogen storage tank ensures stable pressure and flow for downstream consumption, allowing the nitrogen generator to operate efficiently under varying demand.

Advantages of Jiangsu Hongbo PSA Nitrogen Generator

High-Quality, Efficient Carbon Molecular Sieve

Selection: High-quality, efficient carbon molecular sieves are used to ensure maximum energy savings, lower power consumption, and reduced air waste ratio. The customized carbon molecular sieve from Hongbo Company features strong hardness, low powdering tendency, high nitrogen recovery rate, and long service life.

Air Waste Ratio: According to manufacturer’s data, when the adsorption pressure is 0.7MPa and the nitrogen purity is 99.5%, our company designs a 10% reserve with a waste ratio of 3:1. The waste ratio is a key indicator for determining operational cost — lower waste means lower electricity consumption for the air compressor and reduced operational costs.

Lifespan: The carbon molecular sieve used by our company has excellent capacity and stability, with a lifespan of 8–10 years.

Beijing Kunlun Tongtai HMI Touch Screen Control

  • System flow diagram displayed on the touch screen, showing real-time operating conditions and gas flow direction
  • Displays and records accumulated operating time; alerts for maintenance after 8,000 hours of operation
  • Includes electronic manuals, circuit diagrams, flow charts, maintenance checklists, operating procedures, and fault alarms — all accessible for user inquiry
  • Equipped with four remote alarm signals: low inlet air pressure alarm, low outlet nitrogen pressure alarm, high/low nitrogen purity alarm, high nitrogen dew point alarm, unqualified nitrogen alarm
  • Remote signals displayed on touch screen and transmitted via RS485/MODBUS communication protocols for DCS integration

Advanced Packing Technology

The efficient carbon molecular sieve is packed using the “Blizzard” method, ensuring uniform distribution without dead angles and minimizing powdering. The adsorption tower uses multi-stage airflow distribution equipment and automatic compression devices for the carbon molecular sieve, guaranteeing adsorption performance and compression state, effectively extending the sieve’s lifespan.

Our uniquely designed extend-twist vibration platform packing method allows for denser and more uniform packing, reducing friction to a minimum and ensuring no powdering during the adsorption process.

Unique Adsorption Tower Structure

The bottom of the adsorber features a unique lotus-style airflow distributor, which avoids high-pressure airflow impact on the carbon molecular sieve, extending its lifespan. It also ensures uniform gas diffusion, greatly improving efficiency and reducing energy consumption.

Inside the adsorption tower, special gas diffusion equipment allows compressed air to enter through a cyclone device, using specialized alumina ceramic balls to facilitate an “S”-shaped gas flow before contacting the carbon molecular sieve. This significantly reduces impact on the carbon molecular sieve while achieving more uniform gas adsorption, enhancing nitrogen generation efficiency.

Pneumatic Angle Seat Valves and Solenoid Valves

We use well-known pneumatic angle seat valves and imported solenoid valves with an opening time of 0.05 seconds and a normal service life exceeding 2 million cycles, characterized by simple structure, reliable sealing, rapid closure, and easy maintenance — ensuring reliable operation of the nitrogen generation equipment.

Siemens Intelligent Programmable Controller

Our nitrogen generator is equipped with a Siemens PLC control system, offering excellent controllability and a reasonable operational mode. It displays all operational parameters, statuses, and fault signals, automatically adjusting to load changes. The control system includes an LCD display control screen with flexible parameter settings and controls. The dryer can achieve interlocking start-stop control with the air compressor, as well as remote control from a centralized control center.

Online Nitrogen Analyzer

Utilizes nitrogen analyzer produced by Shanghai Changai Electronics for real-time purity monitoring and feedback control.

Automatic Exhaust for Unqualified Nitrogen

At the outlet of the nitrogen process tank, a nitrogen sampling port is set up for purity detection. If the nitrogen purity is unqualified, the analyzer outputs a signal to control the pneumatic valve for discharging unqualified nitrogen into the atmosphere. When nitrogen purity meets standards, qualified nitrogen is delivered to the user’s site.

Applications

  • Electronics & Semiconductor: Reflow soldering, wave soldering, component storage in nitrogen atmosphere
  • Food & Beverage: Modified atmosphere packaging (MAP), wine preservation, beverage bottling
  • Chemical Processing: Blanketing, purging, pipeline cleaning, catalyst regeneration
  • Metallurgy & Heat Treatment: Bright annealing, sintering, carburizing, quenching
  • Pharmaceutical: Nitrogen blanketing for API storage, inert atmosphere for drug manufacturing
  • Petrochemical: Pipeline purging, tank blanketing, flare gas purging
  • Mining: Coal mine fire prevention and inerting
  • Glass & Ceramics: Float glass process, ceramic sintering
  • Laser Cutting: High-purity nitrogen assist gas for clean cuts
  • 3D Printing: Metal powder atomization and inert printing atmosphere

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