Several issues with the new 140DCC
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The first problem of coaxial design in Luoyang is running agent: It has reached 3.0, and the 0-40 micron catalyst particles in the 3.0 microns are as high as 99%. As the start-up time is extended, the run is getting worse and worse, reaching 3.0. The 0-40 catalyst particles in the balancer are as high as 25%. What is the reason? The second problem is that the catalyst is difficult to fluidize when starting operation.: Waiting line. There are only two loose points on the waiting line. Is this related? It's strange that it heals after injection of oil. I don't know the reason? Thanks in advance.
Depends on the reason for the running agent you introduced, "99% of the 0-40 micron catalyst in the three cyclones" is accurate, and how much is 0-20 micron. If there are many fine powders in 0-20 micron, the efficiency of the cyclone is normal, otherwise the efficiency of the cyclone is not good.； “The catalyst particles of 0-40% of the balance agent are as high as 25%, which means that the fine powder content in the balance agent is relatively high. The DCC process is characterized by a large amount of steam injection in the reaction. The amount of steam will increase the catalyst damage, but it will not exceed 18%. Check whether each steam is guided and does not follow the orifice plate, the backflush does not add the orifice plate, the regenerator main air accident has serious steam leakage, and whether the nozzle exceeds the line speed, which increases the damage of the catalyst. ； In addition, DCC’s special agent has lower mechanical strength than conventional agents due to its high molecular sieve content. ； If multiple catalysts are used, the mechanical strength will be different, the wear will be aggravated, and the fine powder will also increase. When the coaxial catalytic device is started, it is often difficult to fluidize the catalyst in the standing pipe, but it becomes normal after fuel injection. ； Your waiting line only has two loose points, which are too few. After fuel injection, the waiting catalyst is easy to fluidize due to coke on the surface.