High-Purity Liquid Air Separation System for Industrial Gases

The High-Purity Liquid Air Separation System is engineered for industrial facilities demanding continuous, reliable access to ultra-pure gases. By harnessing advanced cryogenic technology, this heavy-duty facility extracts nitrogen, oxygen, and argon directly from the atmosphere, transforming ambient air into vital industrial resources. The physical structure features a low-temperature resistant aluminum alloy cold box, providing a solid, insulated core that operates quietly even under extreme pressure. Plant operators will notice the distinct lack of vibration thanks to precisely balanced, internationally sourced compressors and expanders. Designed to operate around the clock, this system ensures a steady, uninterrupted supply of essential gases, eliminating the logistical headaches of external cylinder deliveries and providing total control over your production inputs.

The High-Purity Liquid Air Separation System is an advanced cryogenic air separation unit (ASU) designed to produce high-purity nitrogen, oxygen, and argon for industrial applications. Using advanced cryogenic distillation technology, this system provides continuous and reliable gas supply for steel, chemical, medical, aerospace, and electronics industries.

◆◆ Product Highlights ◆◆

• Production of nitrogen, oxygen and argon

• Purity up to 99.999%

• Cryogenic distillation technology

• Large-scale continuous operation

• Low energy consumption design

• Automated PLC/DCS control

• Modular and customized solutions

• ASME / CE / ISO compliant

◆◆ Key Process Steps ◆◆

1. Air Compression & Purification – The journey begins as ambient air is drawn through high-capacity intake filters, removing microscopic impurities (e.g., dust, moisture, CO₂) and compressed. The purified air is pressurized using premium-grade centrifugal compressors. These heavy-duty components ensure a smooth, low-vibration operation, preparing the air stream for the deep-freeze stages ahead without introducing mechanical contaminants.

2. Cooling & Liquefaction – The compressed air is cooled to cryogenic temperatures (below -185°C) using advanced heat exchangers, turning it into a liquid state. Through optimized thermodynamic cycles and specialized expansion turbines, the air transitions into a dense, super-cooled liquid. This entire cooling process is housed within a heavily insulated, low-temperature resistant aluminum alloy cold box.

3. Fractional Distillation – The liquefied air is fed into a precisely engineered distillation column, where components are separated based on their different boiling points, monitored by sensitive thermal sensors:

• Nitrogen (boiling point: -196°C) rises as a gas, vaporizing first to reach the top of the column as an ultra-pure element.

• Oxygen (boiling point: -183°C) is collected as a liquid, pooling at the bottom as a heavy, dense cryogenic substance ready for critical applications.

• Argon (boiling point: -186°C) is extracted as a secondary product from the middle sections, requiring precise calibration for optimal recovery.

4. Product Storage & Distribution – The separated gases are stored in liquid or gaseous form for industrial use. They are safely channeled into double-walled vacuum-insulated storage tanks, ready to be distributed directly into your facility's pipeline network.

◆◆ Technical Specifications ◆◆

◆◆ Advantages ◆◆

Uncompromising High Purity Output & Quality Control

High Purity Output – Produces ultra-pure gases (up to 99.999% for critical applications). Every unit undergoes rigorous scrutiny, complying strictly with ASME, CE, and ISO manufacturing standards. The structural integrity of the pressure vessels is verified through 100% X-ray non-destructive testing and deep cryogenic leak detection, guaranteeing zero defects upon delivery.

Large-Scale Efficiency & Reduced OPEX

Large-Scale Efficiency – Ideal for bulk production in industrial settings. By integrating advanced heat exchange technology and an optimized thermodynamic flow, the plant significantly lowers the electrical power consumption required per cubic meter of gas produced. This exceptional energy efficiency translates into substantial long-term operational savings.

Intelligent Control & Safety Systems

Operating a complex cryogenic plant is simplified through our fully automated DCS/PLC control architecture. Plant managers can utilize one-touch start/stop sequences, automated fault pre-warnings, and real-time remote monitoring. This smart infrastructure allows for safe, reliable, and virtually unattended operation, protecting the equipment from operational anomalies.

Versatility & Rare Gas Extraction

Versatility – Can be customized to extract rare gases like krypton (Kr) and xenon (Xe). This flexibility allows facility owners to diversify their output and capture additional revenue streams from specialized industrial markets.

Environmental Protection & Sustainability

Industrial power is balanced with ecological responsibility. The plant is equipped with highly effective noise-reduction silencers and a closed-loop circulation design. This ensures low acoustic emissions and zero harmful pollutant discharges, aligning your gas production with stringent global environmental protection mandates.

◆◆ Applications ◆◆

• Medical & Healthcare (liquid oxygen for hospitals) – Supplies life-saving respiratory support elements for clinical networks. The ultra-high purity ensures compliance with strict pharmacological standards, providing safe usage without contamination risks.

• Steel & Metal Production (oxygen for blast furnaces) – Delivers massive volumes of oxygen directly to basic oxygen steelmaking processes. The continuous feed enhances combustion temperatures, significantly accelerating metal smelting and refining cycles.

• Chemical & Petrochemical (nitrogen for inerting) – Provides vast quantities of dry, pure nitrogen for critical blanketing and purging operations. This prevents volatile chemical reactions, protecting both the workforce and sensitive pipeline infrastructure from combustible hazards.

• Aerospace & Electronics (high-purity gases for manufacturing) – Supplies the precise atmospheric control required for semiconductor fabrication and aerospace component testing, essential for producing microscopic electronic circuits without oxidation interference.

This system is a cornerstone of modern gas supply chains, enabling safe, efficient, and sustainable production of essential industrial gases across diverse global sectors.

◆◆ Why Choose Jinhua Gas ◆◆

With more than 25 years of experience in cryogenic gas separation technology, Jinhua Gas specializes in customized air separation plants for global industrial customers. Our systems are manufactured according to ASME, CE, and ISO standards and have been successfully deployed in more than 50 countries.

◆◆ FAQ ◆◆

1. Are you the manufacturer of this equipment？

Yes, we are an experienced manufacturer specializing in this field for 25 years. Our dedicated production facility handles everything from initial blueprinting to final pressure vessel welding, ensuring rigorous oversight at every fabrication stage.

2. Can the system be customized to meet specific requirements？

We provide custom-engineered solutions for different applications. Furthermore, we offer modular and skid-mounted design options that drastically reduce on-site construction time. Our team supports complete turnkey project delivery, managing every phase from initial schematic design to final on-site commissioning.

3. Have your products been deployed in global markets?

Yes, we have successfully supplied our air separation plants to over 50 countries worldwide, complying with international standards like ASME. Every system is engineered to meet stringent regulatory frameworks, ensuring seamless integration regardless of your geographic location.

4. What after-sales services do you provide?

We offer comprehensive after-sales support including:

✔ Technical Consultation - 24/7 expert guidance from seasoned cryogenic engineers

✔ Remote Monitoring - Real-time system performance tracking via our integrated DCS network

✔ Maintenance Packages - Scheduled inspections & consumable replacements

✔ On-site Service - Engineer oversea service available for complex mechanical interventions

✔ Spare Parts Supply - Original components with 18-month warranty

✔ Operator Training - Customized programs for client's technical team

5. Do you offer technical support services?

We cordially invite you to visit our manufacturing facility to inspect our heavy-duty cold boxes firsthand, or participate in our online technical exchange seminar for detailed discussions regarding your specific gas consumption needs.

We welcome you to reach out to our technical specialists for detailed consultations, layout planning, and customized operational solutions.