High Standard Cryogenic Air Separation Plant to Produce 13000nm3/H Oxygen and 20000nm3/H Nitrogen

 

Sichuan GreenFir Machinery Equipment Co., founded by a group of qualified and experienced executive managers and engineers with the objective of providing equipment and services(process design, detail engineering, construction management, procurement and technical inspection) to the clients in a large number industrial gas projects. The main products includes air separation plant, liquid oxygen/nitrogen plant, high purity nitrogen plant.
The company has obtained a number of industry certitications, such as ASME, special equipment production license, pressure vessel design and manufacturing license, etc. GreenFir has two manufacturing based in Chengdu City and Ziyang City, with a manufacturing workshop area of 35000 square meters.
Technical capacity

1. Process simulation & calculation
√ Select the best optimized solution from various simulations and calculations;
√ Further optimaztion according to user's running data on site;
√ Production calculation based on best working point of standard compressor.

2. Process design

· HAZOP analysis;
· Diverse, customized and humanized process;
· Tens of energy-saving air separation process, ie. oxygen-rich process of three column, process of liquid expander, process of waste nitrogen extraction from lower column, etc.

3. Cold box piping design
√ As per international codes and standards;
√ 3D modeling by PDMS or SOLIDWORKS;
√ Piping stress analysis by CAESAR II;
√ Cold-box structure stress analysis & reinforcement by SAP2000 to meet the requirement of site earthquake and wind load, etc;
√ Various unique design inside cold-box.

4. Other technical features
· Energy-saving structure of main condenser / evaporator;
· Anti-leakage, efficient and compact double tube plate steam heater;
· Remote monitoring and fault diagnosis;
· Automatic load changing system and fast load changing system.

 

Air can be separated into its components by means of distillation in special units. So-called air fractionating plants employ a thermal process known as cryogenic rectification to separate the individual components from one another in order to produce high-purity nitrogen, oxygen and argon in liquid and gaseous form.

1. Compression of air
Ambient air is drawn in, filtered and compressed by a compressor.

2. Preccoling of air
To separate air into its components, it must first be liquefied at an extremely low temperature. As a first step, the compressed
air is precooled with chilled water.

3. Purification of air
Impurities such as water vapour and carbon dioxide are then removed from the air in a so-called molecular sieve.

4. Cooling of air
Because the gases which make up air only liquefy at very low temperatures, the purified air in the main heat exchanger is cooled to approx. -175°C. The cooling is achieved by means of internal heat exchange, in which the flows of cold gas generated during the process cool the compressed air. Rapid reduction of the pressure then causes the compressed air to cool further, whereby it undergoes partial liquefaction. Now the air is ready for the separating column, where the actual separation takes place.

5. Separation of air
Separation of air into pure oxygen and pure nitrogen is performed in two columns, the medium-pressure and the lowpressure columns. The difference in boiling point of the constituents is exploited for the separation process. Oxygen becomes a liquid at -183 °C and nitrogen at -196 °C. The continuous evaporation and condensation brought about by the intense exchange of matter and heat between the rising steam and the descending liquid produces pure nitrogen at the top of the low-pressure column and pure oxygen at the bottom. Argon is separated in additional columns and involves some extra steps in the process.

6. Withdrawal and storage
Gaseous oxygen and nitrogen are fed into pipelines for transport to users, e.g. steelworks. In liquid form, oxygen, nitrogen and argon are stored in tanks and transported to customers by road tankers.

Specifications

 Cost-effective gas supply
1. Highly skidded, modular design for low cost installation
2. Compact design requires minimal plot space
3. Low-pressure design with product compression
4. Fully automated controls for unattended operation
High reliability for dependable gas supply
1. Single, integrally geared air compressor
2. Liquid backup system for uninterrupted supply
3. Full local and remote operation
Flexibility
1. Loading following turndown provides power savings at reduced nitrogen consumption rate
2. Customer and local code requirements can be supported within product design envelope
 Q1. Are you manufacturer or trading company?
A: We are professional manufacturer in cryogenic equipment field.
Q2: What's your advantages?
A: We provide you not only technology-leading, stable, cost-efficient equipment, but also solutions and after-sales services.
Q3:Have your engineers participated in any foreign projects?
A: Yes, our engineers have more than 20 years experience in cryogenic equipment filed and had paticipated in the design, manufacturing, installation and commissioning of the equipment in Turkey, Eypt, Myanmar, Pakistan, Iran, etc.
Q4: How can I get the exact price of the product?
A: Please send us your specific requirements, so we can provide the most suitable product and solutions for you.