Treatment of off-flow in the transformed bed layer
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How to deal with the offset flow in the transition bed? This post was last edited by liuze78 on 2008-3-14 11:19]
What type of reactor? Could you explain it more clearly?
Reference: Under normal circumstances, production is continued, and sorting (reinstallation) is carried out during maintenance.
For those involved in production, this is the first choice.
There’s no other way; the catalyst has to be reinstalled. If you try to rely on air currents, it’s impossible to solve the problem
If the subsequent stages can handle it, continue production for now while preparing for a shutdown. Cool down, reinstall the catalyst, and investigate why there was a deviation in its performance, so as to prevent similar incidents from occurring in future production.
If the subsequent processing stages can handle it, continue production for now while preparing for a shutdown. The main reasons for catalyst deviation include the following: 1. Water cooling may be used, resulting in localized pulverization of the catalyst； 2. Scarring on some catalysts ； 3. Uneven loading
Could you explain the reasons for the deviation more clearly? We laypeople also want to learn about it
There are many reasons: first, uneven filling leads to flow deviation； II. The quality of the cold water used is substandard, resulting in scaling on the surface ； III. Severe catalyst pulverization leads to flow deviation ； IV. Damage to the cold shock distributor causes gas flow deviation. The above are just the main reasons.
1 Uneven tension is caused by pouring during loading or by people stepping on it. 2. High air velocity and overproduction cause the catalyst to become uneven. 3 The poor quality of the gas, along with repeated phase changes and fragmentation, alters the surface condition of the catalyst. 4. An excessively low gas-to-air ratio leads to CO decomposition covering the catalyst. 5 Poor steam quality leads to crust formation. 6 Steam or water in the system – any of these reasons can lead to flow deviation. The general treatment methods involve releasing pressure, quickly removing lumps and scars to roughly clean the catalyst surface, carrying out operations outside the furnace to prevent the \"chimney effect,\" using gas backflow according to the process flow, and then reloading the catalyst after it has been unloaded and screened.