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China Factory Liquid Nitrogen Plants - Modular PSA Nitrogen Generation & High-Efficiency Liquefaction Solutions from Suppliers

Introducing our state-of-the-art nitrogen generation and liquefaction units, designed to meet the highest industry standards. Our fully modular design ensures that both nitrogen generation and liquefaction units are compactly integrated, significantly minimizing the footprint within your facility, As a leading China supplier, we utilize PSA nitrogen generation technology, eliminating the need for cryogenic air separation. This enables a rapid startup time with on-stream nitrogen production achievable in less than 30 minutes. Adjustability is key; our units offer nitrogen purity levels ranging from 99% to 99.999%, making them suitable for a diverse array of industrial applications, The liquefaction unit operates using a high-efficiency Joule-Thomson expansion refrigeration cycle, which boasts a high liquefaction rate along with low specific energy consumption. To ensure optimal storage, our liquid nitrogen is kept in vacuum multi-layer insulated tanks, which feature an impressive daily evaporation rate lower than 0.3%, thus guaranteeing a long storage life, For your convenience, our product comes with a fully automated PLC control system that includes remote monitoring and fault alarms, facilitating unattended operation. Additionally, we offer customizable liquid nitrogen outlet pressures ranging from 0.05 to 0.8 MPa, making our units compatible for both vaporizer filling and direct utilization, We pride ourselves on using premium cryogenic-grade materials for all key components, ensuring a remarkable design service life of 15 years or more. Trust us as your go-to factory for reliable nitrogen solutions tailored to meet your needs
    Parameter Specification
    Technology Pressure Swing Adsorption (PSA)
    Adsorbent Carbon Molecular Sieve (CMS)
    Product Gas Nitrogen (N₂)
    Purity 95% - 99.999% (adjustable)
    Capacity 1 - 3000 Nm³/h (single unit)
    Working Pressure 0.6 - 0.95 MPa
    Outlet Pressure 0.1 - 0.6 MPa (adjustable)
    Dew Point ≤ -40℃
    Control Fully automatic PLC with touchscreen HMI

    Nitrogen is produced within 10-15 minutes

    Purity (Feed Gas)

    ≥99.5% N²

    Power Consumption

    ≤0.35 kWh/L

    Liquefaction Efficiency

    ≥80%

    Cold Start-up Time

    ≤4 Hours

    Parameter Value Remark
    Liquefaction Feed Gas High-purity N₂ (≥99.5%) Directly from PSA unit
    Refrigeration Method Joule-Thomson expansion cycle No external refrigerant
    LN₂ Tank Volume 5–100 m³ (customizable) Vacuum multi-layer insulation
    LN₂ Tank Working Pressure ≤0.8 MPa -
    Daily Evaporation Rate ≤0.3% Per GB/T 18443
    LN₂ Outlet Temperature ≤-193 ℃ -
    Cold Start-up Time ≤4 h (first cold-down) -
    Liquefaction Efficiency ≥80% (liquefied / feed) -
    Overall Power Consumption ≤0.35 kWh/L (liquid N₂) Includes N₂ gen. + liquefaction
    Frequently Asked Questions
    What are the feed gas requirements for this nitrogen liquefier?

    The system requires high-purity nitrogen gas (≥99.5%), which can be fed directly from an on-site PSA (Pressure Swing Adsorption) nitrogen generator unit.

    What refrigeration technology is utilized?

    It adopts a Joule-Thomson expansion cycle, eliminating the requirement for any external refrigerants and simplifying plant maintenance.

    What is the overall energy consumption rate?

    The overall power consumption is ≤0.35 kWh per liter of liquid nitrogen, encompassing both the nitrogen generation and the liquefaction processes.

    How well is the liquid nitrogen insulated in storage?

    The storage tanks utilize vacuum multi-layer insulation technology, maintaining a low daily evaporation rate of ≤0.3% in compliance with GB/T 18443 standards.

    What is the initial start-up time from a warm state?

    The first cold-down start-up process is completed within ≤4 hours, after which the unit delivers liquid nitrogen at temperatures of ≤-193 ℃.

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