The catalytic startup fan was activated, and after the pre-heated dry gas was introduced, the circulation rate failed to increase; the reaction temperature dropped, and the slurry volume increased immediately

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This post was last edited by Refiner on 2018-7-4 08:51. After starting the catalyst preparation fans and putting the pre-heated dry gas into use, it was not possible to increase the circulation rate; the reaction temperature dropped, the amount of slurry increased immediately, the flow rate at the compressor inlet decreased right away, the system pressure rose, and the pressure difference between the two vessels decreased. The situation became increasingly unfavorable, until finally the reaction temperature dropped to 490 degrees, and the compressor no longer had any room for adjustment and could not continue operating. Switching to pre-heated steam immediately improved all conditions. After repeating the switching several times, the situation improved with pre-heated dry gas, but it was still not as effective as using pre-heated steam. Of course, this is because the catalyst’s properties deteriorated after heating with burning oil before operations started, and no fresh material was added immediately; but it can’t be that serious, right? Solve! ! ! !