Reasons for the hot and cold zones in low-temperature methanol washing
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As we all know, the equipment in the purification section is divided into hot zones and cold zones. So what do I want to ask? Is it because of the different materials used in the equipment? Is it still easy to manage?
Why hasn’t anyone replied after such a long time? Let everyone share their own understanding. Thank you!
The absorption of acidic gases in low-temperature methanol washing is carried out under low temperature and high pressure conditions, while the regeneration of methanol-rich stream takes place under high temperature and low pressure conditions. Therefore, it is necessary to distinguish between cold zones and hot zones; meanwhile, the equipment, pipes, and fittings in the cold zones should also be made of low-temperature steel, which differs from the material used for pipes in hot regeneration equipment.
Vegetables are mainly classified based on the operating temperature
With the help of everyone, my brother has summarized based on recent studies: the absorption of acidic gases in low-temperature methanol washing is carried out under low temperature and high pressure conditions, while the regeneration of methanol-rich fluid takes place under high temperature and low pressure conditions. The lower part of the regeneration tower is divided into two sections; the tray design is of the double-arch type. On the left side, the flow goes to the methanol removal cycle, where only a descending liquid phase exists. On the right side, the flow goes to the water separation system, where both a descending liquid phase and an ascending gas phase are present. This arrangement also helps to reduce the load on the reboiler in the regeneration tower. Therefore, it is necessary to separate the cold zone from the hot zone in this area, and the materials used for the equipment, pipes, and fittings in the cold zone must be low-temperature steel, which differs from the materials used for the pipes in the hot regeneration equipment. Please offer corrections.
Reply to 3# sxtblo: My question is a bit vague. To clarify, it refers to the lower part of the regenerator – with circulation in the cold zone on the left and circulation in the hot zone on the right. The reason for this division.
The cold zone and the hot zone are a unified concept; it’s not determined by just one tower
LZ’s understanding is completely wrong. . . . . Study hard*learn* before coming forward to give your opinions. . . .