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Principle and operation of air separation unit

Principle and operation of air separation unit
Principle and operation of air separation unit: at present, there are many forms and types of air separation unit produced in China. There are mainly four basic processes: high pressure, medium pressure, high and low pressure and full low pressure process. With the expansion of production scale, the demand for oxygen and nitrogen is increasing. At the same time, the correct operation of air separation unit is of great importance, which is related to the safety of air separation unit and the long-term stable operation of production unit.
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Dec 11, 2020
On December 7, 2020, Kaifeng DEAR air separation Industrial Co., Ltd. (hereinafter referred to as: DEAR air separation) and Shaangu Group once again j
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The air separation column mainly includes main heat exchanger, liquefier, distillation column, condensing evaporator, etc. The main heat exchanger, condensing evaporator and liquefier are plate type of heat exchangers. It is a new type of all aluminum metal composite partition heat exchanger. The average temperature difference is small, and the heat exchange efficiency is as high as 98-99%. Distillation column is the unit of air separation. The types of column unit are classified according to the internal parts. The sieve plate column with sieve plate, the bubble cap column with bubble cap plate, and the packed column with packing material. The sieve plate is widely used in air separation distillation column because of its simple structure, easy manufacture and high efficiency. Packed column is mainly used for distillation column with diameter less than 0.8m and height less than 7m. Bubble column is seldom used because of its complicated structure and difficult manufacture. Turbine
Dec 18, 2020
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.
Dec 16, 2020
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