Cryogenic Liquid Nitrogen Plant, also named nitrogen generation plant, is a new line of systems, producing liquid nitrogen (LIN) with 99.5% to 99.9999% purity. It allows for an on-site production of liquid nitrogen, with a production capacity of 20 liters/hr. to over 1000 liters/hr.

As an experienced nitrogen generation plant manufacturer, Cryogenic Liquid Nitrogen Plants has modular and compact designs, with few processing units. These are fully automated units, with an easy to use touchscreen panel.

The production process of liquid nitrogen

The production of liquid nitrogen is mainly achieved through air fractionation, and the specific process flow is as follows:

Filtering impurities: Firstly, the air passes through an air filter to remove dust and other mechanical impurities.
Purification: After being pre cooled by an air pre cooler, the air enters the molecular sieve purifier that is switched to use, filtering out carbon dioxide, hydrocarbons, and adsorbing water vapor.
Cooling and liquefaction: The purified air is placed in an air separation refrigeration box for heat exchange and liquefaction. When the temperature drops to -172 ℃, it enters the lower tower, while another part of the air is expanded and cooled before being sent to the upper tower.
Separate liquid nitrogen: In the lower tower, air is separated into nitrogen and oxygen rich liquid air, and liquid nitrogen separation is completed.
Collection and storage: The produced liquid nitrogen is transported to storage tanks through low-temperature insulated pipelines, which have good insulation properties to prevent evaporation loss of liquid nitrogen.

The safety precautions to be taken during the production process of liquid nitrogen include:

Low temperature operation: When liquid nitrogen is below -196 ℃, appropriate protective clothing and gloves should be worn during operation.
Pressure management: The production process of liquid nitrogen involves pressurization and cooling, and pressure must be strictly controlled to prevent equipment damage or safety accidents.
Protective measures: The operating area should be equipped with emergency showers and eye wash facilities to cope with possible low-temperature frostbite or other accidents.

By following the above steps and precautions, liquid nitrogen can be produced efficiently and safely.

Shipping & Delivery

The transportation of large equipment, such as the air separation unit, PSA gas plant, and the CO2 recovery plant, has always been a concern of overseas customers. The unloading and lifting must be careful. How to reduce extra handling fees is also one of the issues to be taken into consideration.

We can provide you with a worry free delivery:

1. We maintain long-term cooperation with some partner forwarders. So we can:
   a. tell the accurate shipping date and quote the best shipping rates
   b. book appropriate cargo space and choose the best shipping method: container, roll-on-roll-off ship, open top container or bulk carrier
   c. make appointment for commodity inspection, arrange shipment, and prepare necessary documents for customs clearance
2. We have our own private wharf. Even 300m3 pressure vessels can be loaded within the factory and sent to Shanghai port.
3. We are quite experienced in loading and fixing containers, protecting the cargo from any possible damage on the way. The cargos will be in perfect condition upon the arrival at the destination.
4. The bulk ship and roll-on-roll-off ship are for the delivery of large and bulky cargos. The destination port may not be equipped with large cranes, and at somewhere the lifting charges are quite expensive. Taking these factors into consideration, we will choose ships equipped with cranes to reduce costs for customers. Our forwarder will arrange appropriate crane lifting and attach the cargo to the deck or cabin.
5. We will track the delivery until you receive the cargo.
6. The vast majority of customers receive cargos intact, but there is still likeliness of slight painting scratches. In this occasion, we suggest customers to fix the paint on their own if necessary. In addition, customers may purchase transport insurance to further reduce the risk of cargo damage.