Why does a large amount of water appear in the olefin separation and washing tower for methanol-to-olefins production?
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This post was last edited by liaifeng on 2018-7-28 at 16:47. Why does a large amount of water appear in the water wash tower used for the separation of olefins produced from methanol?
Is a high-efficiency demister installed at the gas outlet of the wash tower in the original post?
The water wash tower must be equipped with an efficient demisting separator at the gas phase outlet, such as a feather-plate high-efficiency gas-liquid demisting and defogging separator. Otherwise, the gas stream at the top of the wash tower will carry a large amount of water droplets and foam as it exits the tower, which can have various adverse effects on the downstream pipelines and subsequent equipment. The higher the gas velocity and the smaller the diameter of the water scrubber tower, the more water the gas stream can carry. Therefore, the water scrubber must be equipped with a baffle-type high-efficiency gas-liquid demisting and defoaming separator at the gas phase outlet. The Yuye high-efficiency demisting and separation internals can be installed directly on the inner side of the top of the wash tower, sharing the tower body with it to reduce investment costs. If it is not intended to install the feather-leaf efficient demisting and separation internals directly inside the wash tower, the feather-leaf demister can be installed on the gas-phase outlet pipeline outside the wash tower as a separate separation unit for management.
The analysis is excellent, thank you. But right now water is not supplied continuously; it’s only provided every few days.
If water ingress does not occur continuously but rather every few days, it is caused by periodic fluctuations in operating conditions. In water scrubbers that do not have efficient demisters, liquid droplets and foam are separated from the gas phase entirely by gravity settling. Gravity sedimentation separation has a low separation efficiency, limited operational flexibility, and poor adaptability. Once the operating conditions change, such as an increase in gas velocity or an increase in the amount of washing water sprayed, wash towers that do not have efficient demisters will exhibit significant water carryover. If a high-efficiency defoaming and demisting separation internal component is added to a water washing tower that does not have a high-efficiency defoamer, its operational flexibility range can generally be extended to 10–135% or even higher. For more information on the technical performance of Yuye’s high-efficiency demisting and defoaming separation internals, please visit http://bbs.hcbbs.com/thread-1354813-1-1.html or log in to www.novelenergytech.com for in-depth details.
I suspect there is a blockage in the downcomer of the water wash tower; as for what is causing the blockage, further analysis is needed.
If it’s the downcomer that’s blocked, then water will be present not just every few days, but rather frequently or even continuously, right?
Whose technology is it? A water scrubber doesn’t it use packing?
THE NOVEL feather-leaf high-efficiency gas-liquid separation technology features a feather-leaf gas-liquid high-efficiency demisting and defoaming separation element at the gas outlet at the top of the tower. Please visit the link http://bbs.hcbbs.com/thread-1354813-1-1.html and log in to www.novelenergytech.com for further details.
What I actually want to ask is which company’s technology is used by the original poster for MTO olefin separation – LUMMUS’ or Huayi’s?