NUZHUO Done Another Oversea Cryogenic Project: Uganda NZDON-170Y/200Y

Congratulations on the successful delivery of the Uganda project! After half a year of hard work, the team showed excellent execution and teamwork spirit to ensure the smooth completion of the project. This is another full display of the company’s strength and ability, and the best return for the hard work of team members. I hope team members can continue to maintain this efficient work state and contribute more to the development of the company. At the same time, it is also expected that the project can achieve greater success and benefits in the future operation.

We sincerely introduce to our customers the process of producing air separation projects in our factory.

The production process of liquid oxygen and liquid nitrogen air separation project mainly includes the following steps:

1， Compressed air: Compression is usually performed using screw or piston compressors to increase the concentration of oxygen and nitrogen in the air by increasing the density of gas molecules.
Air precooling: the compressed air needs to be precooled through the condenser, and the water cooling pipe in the condenser reduces the temperature of the air, so that the water vapor in it condenses into water liquid.
2， Separation of air: After the pre-cooling of the air into the separation equipment, through the role of molecular sieve and molecular filter, the use of oxygen and nitrogen in the air sedimentation rate is different principle, the oxygen and nitrogen are separated.
3， Compressed oxygen and refined nitrogen: The separated oxygen and nitrogen are compressed and cooled twice respectively to increase their concentration.
Air liquefaction: The final step in making oxygen and nitrogen is the liquefaction of oxygen and nitrogen, which is usually achieved by lowering the temperature and increasing the pressure.
4， Separation of liquid oxygen and liquid nitrogen: Liquid oxygen and liquid nitrogen have different boiling points at low temperatures, and can be separated at different boiling points by controlling the temperature and using techniques such as flash separation.
In addition, depending on the specific process and equipment, the air separation project may also include other steps, such as backflow exhaust gas expansion processes, external compression processes, etc., which help to improve the purity of nitrogen and optimize the operating efficiency of the equipment.

In general, the production process of liquid oxygen and liquid nitrogen air separation project is a complex and fine process, which requires strict control of the conditions and parameters of each step to ensure the quality and output of the product. At the same time, with the continuous progress of technology, the production efficiency and quality of liquid oxygen and liquid nitrogen air separation projects are also constantly improving.

 

The components of the liquid oxygen liquid nitrogen air separation project mainly include the following parts:

1, Air compressor: Used to compress air to the required pressure, increasing the concentration of oxygen and nitrogen in the air.

2, Air cooler: The cooling of compressed air helps to remove water vapor from it and lowers the air temperature for subsequent processing.

3, Molecular sieve and molecular filter: By adsorption or filtration, remove impurities and moisture from the air, while taking advantage of the difference in molecular size of oxygen and nitrogen for initial separation.

4, Expander: used in the refrigeration cycle to reduce the temperature of the air and recover part of the cold volume to improve energy utilization efficiency.

5, Main heat exchanger: Used to cool the air to a lower temperature while recovering the amount of cold generated during expander and other processes.

6, Distillation tower (upper and lower tower) : This is the core part of the air separation unit, the upper and lower tower use the difference in the boiling point of oxygen and nitrogen, through the distillation process to further separate oxygen and nitrogen.

7, Liquid oxygen and liquid nitrogen storage tank: used to store separated liquid oxygen and liquid nitrogen products.

8, Condensing evaporator: used for nitrogen condensation and liquid oxygen evaporation in the rectification process to maintain the rectification process.

9, Liquid-air liquid nitrogen subcooler: the cryogenic liquid is supercooled, the gasification after throttling is reduced, and the rectification condition is improved.

10, Control system: including a variety of sensors, valves and meters, used to monitor and control the parameters of the entire production process to ensure the stable operation of the equipment and product quality.

11, Pipes and valves: used to connect individual components to form a complete process flow.

12, Auxiliary equipment: such as water pumps, cooling towers, power supply equipment, etc., to provide necessary auxiliary services and support for the entire air separation device.

These components work together to complete the entire process from air compression, cooling, purification, separation to product storage. Specific configurations and component types may vary depending on the size, technical level and process requirements of the air separation plant.