How a liquid oxygen gas plant Works
NEWTEK's LOX generators are based on cryogenic air separation technology and operate as follows:
Air Intake and Compression and Filtration: Atmospheric air is drawn in and compressed to a low pressure of 5-7 bar (0.5-0.7 MPa) in the plant's air compressors (Atlas Copco oil-free rotary air compressors using screw/centrifugal technology). The air is then filtered.
Pre-cooling: The process air is pre-cooled to approximately 12°C using refrigeration before being fed into an air purifier.
Purification and Impurity Removal: The purifier, comprised of a double molecular sieve, removes impurities such as carbon dioxide, hydrocarbons, and moisture from the process air. The purified air then enters the air separation unit.
Cryogenic Liquefaction: The air passes through a series of heat exchangers and then a turboexpander to cool the air to below -165 to -170°C, completing the liquefaction process. Distillation Separation: Liquid air is first fed into a high-pressure distillation column, and then the selected gases are fed into a low-pressure distillation column. Distillation achieves commercial purity, separating oxygen and nitrogen. The air entering the low-pressure plate-fin heat exchanger must be completely purified and cooled to subzero temperatures within the heat exchanger through the air expansion process in the expander. A temperature difference of as little as 2 degrees Celsius must be achieved at the hot end of the heat exchanger. Upon reaching the air separation column, the air is liquefied and separated through distillation.
Storage: Liquid oxygen is stored in a tank connected to the liquefier, forming an automated system. Liquid oxygen is then pumped out via a hose.
The introduction of liquid oxygen in metal cutting and welding operations has radically changed the limitations of traditional processes. When liquid oxygen is mixed with combustible gases (such as acetylene and propane) in specific proportions, it produces a high-temperature flame far exceeding that of ordinary air-assisted combustion, easily exceeding 3000°C. This ultra-high temperature is sufficient to rapidly melt a wide range of metal materials, including difficult-to-machine materials like high-strength alloy steel and stainless steel. During the cutting process, the high-temperature flame instantly melts the metal locally, forming slag. The strong oxidizing properties of liquid oxygen accelerate the oxidation and shedding of the slag, resulting in a smooth, flat cut surface. This not only significantly shortens cutting time but also reduces subsequent polishing steps, significantly improving processing accuracy and efficiency. For welding operations, the stable high-temperature field generated by liquid oxygen combustion ensures full fusion of the weld metal, reduces the occurrence of defects such as porosity and slag inclusions, and enhances the strength and sealing of the weld joint, meeting the high-precision welding requirements of high-pressure pipelines and heavy machinery.
NEWTEK Liquid Oxygen Equipment Turnkey Project - One-Stop Solution for Easier Production
Customization: Our professional team will conduct an on-site site survey and customize a customized equipment solution based on your production capacity requirements (5-50 tons/day), site conditions, and industry scenarios, precisely matching the oxygen needs of various applications, such as metal cutting and steel smelting.
One-Stop Construction: This includes the procurement and installation of core equipment, including air compressors, high-grade stainless steel air separation towers, and cryogenic storage tanks. We also complete factory construction tasks, such as piping and electrical configuration, to ensure a rational system layout and smooth operation.
Commissioning Support: After equipment installation, we provide comprehensive commissioning services to ensure compliance with all performance standards. We also provide specialized training for operators and maintenance personnel, covering equipment operating principles, daily operating procedures, and troubleshooting techniques, ensuring a quick start.
Lifelong Operations and Maintenance: Our 24/7 technical support team monitors equipment operating status in real time through a remote monitoring system and responds to your needs at any time, ensuring a worry-free start-up.
Lower procurement costs: Through consolidated purchasing, we reduce total equipment investment by 15%-20%, offering a significant price advantage over independent procurement.
Reduced construction costs: Standardized construction processes reduce on-site rework costs by 30%, eliminating additional expenses due to improper construction.
Quick commissioning: Projects can be put into production quickly upon completion. Combined with efficient production capacity, our investment payback period is significantly shortened, allowing you to quickly recoup your investment and achieve profitability.
FAQ
1. What services are included in a customized, one-stop, turnkey project?
We provide comprehensive services, from needs analysis and equipment customization to installation and commissioning, personnel training, and ongoing maintenance.
2. How is the equipment solution customized to meet your needs?
A professional team will survey the site and, based on production capacity, scenario requirements, and other factors, design a customized equipment solution.
3. Does the customized project guarantee regulatory compliance?
We ensure that the construction meets environmental and safety standards and successfully passes inspection by relevant authorities.
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