Liquid Oxygen Plant

Production Scale: The lox plant designed and built by NEWTEK boast robust mass production capabilities, with a single unit capable of producing hundreds of tons per day and a stable, controllable annual output. These plants can meet the continuous production needs of large steel mills and chemical plants, as well as the large-scale oxygen supply plans of medical groups, ensuring a long-term, stable supply of liquid oxygen to a wide range of customers.
Product Quality: Our cryogenic oxygen plant utilize cutting-edge air separation and cryogenic technologies, producing liquid oxygen with a purity exceeding 99.6%, with impurity levels strictly controlled at the ppm level.
Applications: The liquid oxygen produced by these plants can be directly used in emergency medical care, surgical oxygen supply systems, provide an efficient combustion aid for industrial steelmaking, and serve as a key raw material for aerospace rocket propellant, meeting the stringent gas usage standards of various applications.
Customized Configuration: Plant parameters (such as purity, pressure, and energy consumption control) can be customized based on customer production requirements, site conditions, and gas application. These plants can also be equipped with associated gas production modules, such as liquid nitrogen and liquid argon, to achieve a coordinated supply of multiple gas types.

First, air is compressed. Atmospheric air is compressed to a low pressure of 5-7 bar using advanced screw or centrifugal compressors, replacing traditional piston-type equipment and ensuring stable, trouble-free operation.
The air then enters a pre-cooling system, where a low-pressure refrigerant pre-cools the compressed air to approximately 12°C in preparation for subsequent purification.
The air then enters a purifier, where a dual molecular sieve dryer operates alternately to precisely remove carbon dioxide and moisture, preventing impurities from affecting separation efficiency.
The purified air is cooled to -165 to -170°C by a high-efficiency turboexpander, reaching the low-temperature conditions required for liquefaction.
The cooled air then enters a low-pressure finned heat exchanger for further processing before entering an air separation tower, where distillation separates the liquid air from the liquid. The resulting oxygen is 99.6% pure. Nitrogen with a purity of 99.9% (oxygen content ≤ 3 ppm) can also be produced simultaneously, without compromising oxygen production.