What are the reasons for the increase in secondary anti-hydration capacity?
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Our plant is equipped with a catalytic cracking unit with a capacity of 500,000 tons per year. Under normal conditions, the inventory in the second reactor is kept at around 4 tons. An accidental malfunction caused the sliding valve to lock, which led to an increase in the inventory in the second reactor; it rose as high as 20 tons. After shutting off the feed, venting was carried out at the bottom of the riser. Once feeding was resumed, the inventory in the second reactor remained high, at around 9 tons. Has anyone encountered such a situation? Could someone please explain what the reason is? Is there any good solution?
1. Check the instrument to confirm whether the measurement is accurate. 2. Perform the calculation to determine the change in total reserves. 3. Is the pressure balanced? Make a comprehensive judgment.
1. Instrument issue. 2. It might be the catalyst and sludge at the bottom