HANGZHOU NUZHUO TECHNOLOGY GROUP CO.,LTD.

Against the backdrop of the growing global demand for industrial gas solutions, PSA (Pressure Swing Adsorption) nitrogen generators, with their advantages of high efficiency, energy saving, and low operating costs, have become indispensable core equipment in many industries. As a leading company in this field, Nuzhuo Group recently shared its professional insights on the core configuration and full life-cycle maintenance of PSA nitrogen generators with global customers, aiming to help users maximize equipment value and ensure stable production.

Part 1: The Cornerstone of Superior Performance – Analysis of the Core Configuration of Nuzhuo PSA Nitrogen Generators

Nuzhuo Group points out that a high-performance, long-life PSA nitrogen generator stems from its excellent configuration. The following are the four key systems that determine the quality of the equipment:

1. Compressed Air Purification System (Pre-treatment)

This is the “lungs” of the nitrogen generator; its cleanliness directly determines the final nitrogen purity and the lifespan of the carbon molecular sieve.

Configuration Highlights:

1.1 Refrigerated Dryer: Effectively removes liquid water and water vapor from compressed air, lowering the air dew point. 1.2 Precision Filter: Employs three-stage or multi-stage filtration to progressively remove oil mist, liquid water, and solid particulate matter (with a precision up to 0.01μm), providing ultra-clean feed air for subsequent adsorption towers.

Nuzhuo Advantage: Utilizes high-efficiency coalescing filter elements and activated carbon filters to ensure oil content is reduced to <0.003ppm, fundamentally protecting the core adsorbent.

2. Pressure Swing Adsorption and Separation System (Core Main Unit)

This is the “heart” of the nitrogen generator, directly responsible for nitrogen and oxygen separation.

Configuration Highlights:

2.1 High-Performance Carbon Molecular Sieve (CMS): Nuzhuo selects imported/top-tier domestic carbon molecular sieves with high adsorption capacity, high selectivity, and superior wear resistance. This is fundamental to achieving high nitrogen purity (up to 99.9995%) and low gas consumption.

2.2 Dual-Tower Adsorption Structure: Towers A and B alternately perform pressure adsorption and depressurization regeneration to achieve continuous nitrogen production. The tower body is made of high-quality carbon steel or stainless steel, and the internal airflow distributor is optimized to prevent airflow impact from pulverizing the molecular sieve.

2.3 Precision Control Valves: High-quality pneumatic or solenoid valves from well-known brands (such as SMC, ASCO, and Burkert) are used. Their switching speed, sealing performance, and durability are key to ensuring stable system operation and extending the life of the molecular sieve.

3. Intelligent Control System (Brain) The intelligence level of modern nitrogen generators is reflected in their control system.

Configuration Highlights:

3.1 PLC + Touch Screen (HMI): Fully automatic operation, real-time display of key parameters such as nitrogen purity, flow rate, and pressure. Features fault self-diagnosis and alarm functions.

3.2 Online Purity Analyzer: Real-time monitoring of the purity of the produced nitrogen and feedback of the signal to the control system to achieve closed-loop control, ensuring that the nitrogen quality always meets standards.

Nuzhuo Advantages: Provides customized control solutions, easily connects to factory IoT systems, and enables remote monitoring and data management.

4. Nitrogen Buffer and Stabilization System (Post-Processing)

Ensuring stable pressure and quality of output nitrogen.

Configuration Points:

4.1 Nitrogen Buffer Tank: Balances system pressure fluctuations, stores a small amount of qualified nitrogen, and provides brief reaction time in case of compressor or upstream malfunction.

4.2 Post-Filter: Further filters out trace amounts of dust that may be carried from the adsorption tower, ensuring the cleanliness of the final nitrogen output.

Part Two: Long-Lasting and High-Efficiency Guarantee – Nuzhuo PSA Nitrogen Generator Scientific Maintenance Guide

“Seven parts configuration, three parts maintenance.” The Nuzhuo Group emphasizes that scientific maintenance is the core of ensuring long-term stable operation of equipment and reducing total cost of ownership (TCO).

A. Daily Maintenance (Daily/Shift for Operators)

1. Inspection: Check if the pressure gauge reading is normal and listen for any abnormal noises during equipment operation.

2. Drainage: Empty the automatic or manual drain valves of the gas storage tank, refrigerated dryer, and filters at all levels to prevent moisture accumulation.

3. Record Keeping: Record key data such as nitrogen purity, flow rate, pressure, and dew point for trend analysis.

B. Regular Maintenance (based on operating time or equipment prompts)

1. Filter Cartridge Replacement:

1.1 Pre-filter cartridge: Typically replaced every 3000-4000 operating hours or when the pressure difference exceeds 0.1 MPa. This is one of the most important maintenance items.

1.2 Post-filter cartridge: Replaced every six months to one year, depending on conditions.

2. Carbon Molecular Sieves Replenishment: Under normal circumstances, high-quality carbon molecular sieves have a service life of 8-10 years. However, if the pre-treatment fails or is operated improperly, it may age prematurely. Regular (e.g., annual) checks for pulverization are necessary, and replenishment or replacement is required as needed.

3. Control Valve Inspection: Regularly inspect the solenoid pilot valve and cylinder of pneumatic valves, clean the valve core, and ensure sensitive operation and no leaks.

4. Purity Analyzer Calibration: The online oxygen analyzer should be calibrated every six months or year using standard gas to ensure measurement accuracy.

C. Annual Comprehensive Overhaul: A comprehensive overhaul by professional technicians is recommended annually, including:

1. Thoroughly inspect electrical circuits and wiring terminals.

2. Clean dust from inside the control system PLC and touchscreen.

3. Conduct comprehensive performance testing and data verification of the equipment.

Nuzhuo Group concludes:

“Choosing a well-configured PSA nitrogen generator is the beginning of success, while implementing a scientific and rigorous maintenance plan is the guarantee of continued success. Nuzhuo Group is not only committed to providing customers with top-of-the-line, reliable nitrogen generators, but also aspires to be a full lifecycle partner, providing comprehensive services from installation and commissioning, operation training to preventative maintenance, ensuring your production always operates at its optimal state.”

Through this detailed explanation, Nuzhuo Group once again demonstrates its technical strength and customer-centric service philosophy in the industrial gas field, providing clear and professional equipment management and maintenance guidance for global users.

For any oxygen/nitrogen/argon needs, please reach out to us ：

Emma Lv  

Tel./Whatsapp/Wechat：+86-15268513609

Email：Emma.Lv@fankeintra.com

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