Olefin separation problem
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This post was last edited by liaifeng on 2018-8-3 22:30. In the olefin separation process, how can we prevent the reaction gas from carrying water after passing through the water scrubber and the alkali scrubber?
The liquid level in the washing section of the alkali scrubber should not be kept too high; also, check whether the demisting screen in the washing section is damaged.
Control the pressure difference in the alkali scrubber carefully; excessive fluctuations in this pressure difference can lead to water being carried in the reaction gas
Defoamer and alkali scrubber pressure difference, fluctuations in operating pressure!
The gas-phase load is kept within the design range to maintain a stable operating pressure and prevent foam entrainment. Temperature is also crucial; taking a water scrubber as an example: if the inlet gas temperature is lower than the washing temperature, water evaporates into the gas phase. When the intake temperature is higher than the exhaust temperature, partial condensation of water vapor in the gas phase occurs, causing the liquid level in the wash tower to rise. Additionally, the washing water and alkali solutions may foam and cause water carryover, which requires the addition of an antifoaming agent to the system.
The gas phase load exceeds the design load by a large margin, the pressure difference due to blockage of the packing in the wash tower is high, the amount of water used for washing is excessive, and the demisting mesh is damaged, among other issues