Design of heat exchangers for small air separation unit
Design of heat exchangers for small air separation unit
Factors influencing the logistics distribution characteristics of plate fin heat exchangers and improvement measures which can improve the overall effectiveness of plate fin heat exchangers.
Products of Design of heat exchangers for small air separation unit
New material industry is a new field with vitality and development potential in chemical industry. New chemical materials refer to the advanced materials with excellent performance and function emerging or developing in the field of chemical industry. They are knowledge intensive and technology intensive materials with high technology content and high value. In the fine chemical industry, advantageous enterprises are actively building intelligent digital workshops, accelerating the application of intelligent logistics management technology and unit in the production process, and promoting digital control, real-time monitoring of status information and adaptive control. DEAR air separation can provide customers with intelligent air separation unit and overall operation services, help customers develop rapidly in the industry, and constantly improve the construction of intelligent detection and supervision system, so that customers can reach a new level of intelligent management of air s
The metallurgical industry has its unique industry characteristics and high requirements for oxygen purity. DEAR air separation has cooperated with domestic and foreign metallurgical industry customers in many projects, has rich project experience, and has continuously invested funds to develop energy-saving and intelligent air separation plant. KDON-10000/10000 is highly praised by customers for its high efficiency and stable operation.
Air separation unit is a kind of unit that takes air as raw material, transforms air into liquid by low temperature cryogenic method which compresses and circulates air, and then gradually separates oxygen, nitrogen, argon and other inert gases from liquid air by distillation.
At present, the air separation unit produced in China has many forms and types. There are unit for the production of gaseous oxygen and nitrogen, as well as unit for the production of liquid oxygen and nitrogen. However, there are four types of basic processes: high pressure, medium pressure and low pressure, and full low pressure process. The production scale of air separation unit in China has developed from the original oxygen generator which can only produce 20m³/ h (oxygen) to the current large-scale air production capacity of 20000 m³/ h, 30000 m³/ h and 50000 m³/ h (oxygen).
The air separation unit can be divided into 5 basic systems in terms of process
1. Impurity purification system: the mechani
Special pressure-bearing equipment generally bears internal pressure, that will cause tensile stress inside the shell, which is called working stress. The working stress is directly proportional to the pressure and diameter, and inversely proportional to the vessel wall thickness. The axial stress is half of the circumferential stress. Therefore, for cylindrical vessels, the stress of longitudinal weld is twice that of girth weld. Because the geometric shape of the spherical shell is symmetrical to the spherical center, and the axial stress is equal to the circumferential stress in numerical value. Therefore, the wall thickness of the spherical vessel can be reduced by half as much as that of the cylindrical vessel under the same pressure and diameter.