Cryogenic Liquid Oxygen Plant

NEWTEK has a new type of liquid oxygen production equipment designed to produce high-purity liquid oxygen on-site. It uses vacuum pressure swing adsorption technology to generate gaseous oxygen, which is then liquefied through a closed-loop nitrogen cooling system. Designed for portable applications without the need for regular relocation, the unit has a modular design for easy transport and on-site installation. The equipment is divided into four modules, can be shipped in ISO containers and is fully operational within two days. Two models are available with capacities of 2.0 and 5.0 tons per day.

Additionally, it contains an air purge unit for cleaning liquid oxygen storage and transfer tanks. Such devices typically use a dry air purge system, which purifies the chamber air by passing external compressed air through a desiccant drying system.

Components of the equipment include a motor, blower, power box and heater mounted on the trailer. The airflow system connects dryers, blowers, heaters and service hoses through ducts for easy maintenance and use. The trailer chassis adopts a steel structure and has a four-wheel running mechanism for easy transportation, and is equipped with road safety facilities such as reflectors.

This system provides an efficient, portable and reliable liquid oxygen production solution suitable for a variety of scenarios, such as medical, industrial or other fields that require high purity liquid oxygen.

How does a Cryogenic Liquid Oxygen Plant work?

A cryogenic oxygen plant operates on the principle of cryogenic distillation to separate and purify oxygen from air. Here’s a simplified breakdown of the process:

Air Compression: The process begins with the compression of atmospheric air using compressors to increase its pressure.

Purification: The compressed air is passed through purification stages to remove impurities like moisture, carbon dioxide, and other trace gases. This purification step is crucial to ensure the quality of the end product.

Cooling: The purified air undergoes cooling in a heat exchanger to bring it to very low temperatures. The air is chilled until it reaches temperatures below its boiling point.

Fractional Distillation: The cooled air enters a distillation column where it undergoes fractional distillation. At extremely low temperatures, air components start to liquefy and separate based on their boiling points. Nitrogen and argon, which have lower boiling points, liquefy first and are collected separately.

Oxygen Separation: The remaining gases, now enriched with oxygen, continue to be cooled until the oxygen reaches its boiling point and turns into a liquid. The liquid oxygen is then collected, stored, and eventually vaporized back into a gaseous state.

Product Storage: The gaseous oxygen is stored in tanks or cylinders for distribution and use in various applications such as medical, industrial, or aerospace purposes.

The cryogenic process is highly efficient in producing high-purity oxygen (typically around 99.5% pure) and is widely used for large-scale oxygen production due to its effectiveness in separating gases at extremely low temperatures.

What is Cryogenic Liquid Oxygen Plant?

Cryogenic liquid oxygen is oxygen that has been cooled to extremely low temperatures, typically below -183 degrees Celsius (-297 degrees Fahrenheit), at which point it turns from a gas into a liquid. This process of liquefaction allows for the storage and transportation of oxygen in a more compact and efficient manner compared to its gaseous state.

Liquid oxygen is commonly used in various applications such as:

Medical Use: It's utilized in hospitals for respiratory therapy, as well as in oxygen therapy for patients with respiratory conditions.

Industrial Processes: Liquid oxygen is an essential component in various industrial processes, including metal cutting and welding, where it provides a high-purity source of oxygen for combustion.

Rocket Propulsion: In the aerospace industry, liquid oxygen serves as an oxidizer in rocket propulsion systems due to its ability to support combustion efficiently.

The extreme low temperature required to keep oxygen in its liquid state necessitates specialized storage and handling procedures. Insulated containers known as cryogenic tanks are used to store and transport liquid oxygen, ensuring it remains at the required low temperatures and minimizing evaporation losses. Safety precautions are essential when handling cryogenic liquids due to their extremely cold temperatures and the potential for rapid expansion if not properly contained.

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