uop. Regeneration 3.5

May I ask, what topic do you want to discuss, OP? Please write it clearly. Thank you.

The content in the third manual regarding the regeneration cycle steps of uop3.5

What does the cycle step mean? I didn’t understand

Catalytic cracking unit regenerator?

No device was mentioned; it just said UOP regeneration 3.5 – I don’t understand what that refers to

Raw L-valve assembly, separation hopper, regenerator, nitrogen seal tank, lock hopper, regenerated L-valve assembly, reduction section

Catalyst regeneration is carried out using UOP’s third-generation “CycleMax” catalyst regeneration process, which enables continuous cycling of the catalyst while simultaneously completing its regeneration. The spent catalyst from the fourth reforming reactor is transferred to the regeneration section, where catalytic coking, oxychlorination (chlorine supplementation and redispersion of metals), drying, and cooling take place in sequence. The regenerated catalyst is circulated back to the reduction zone via a lockhopper for two-stage reduction (from an oxidized state to a reduced state), then moves down through a downcomer to the first reforming reactor, passes through the second and third reactors in sequence, and finally reaches the fourth reactor to complete one cycle. The cycling and regeneration of the catalyst are controlled by the Catalyst Regeneration Control System CRCS. a) The interior of the regenerator features a two-layer Johnson screen structure, with the inner layer being an inverted trapezoidal cone-shaped screen. Its main purpose is to reduce the residence time of the catalyst to be regenerated in the high-temperature, high-water, low-oxygen coking zone at the top of the regenerator, thereby helping to minimize the loss of the catalyst’s specific surface area ； Second, increase the residence time of the catalyst at the bottom part of the regenerator to ensure that it burns completely before entering the oxychlorination zone. b) The reduction zone is located at the top of the first reforming reactor, reducing the height of the regeneration system. The reduction zone involves two stages of reduction: low-temperature reduction takes place in the upper bed layer to remove most of the water ； High-temperature reduction is carried out under conditions of relatively dry lower bed layers, to prevent loss of catalyst activity due to high temperature and high moisture levels. c) Reforming hydrogen can be directly used as the catalyst reduction hydrogen, or hydrogen produced by hydrogen generation can also be used as the catalyst reduction hydrogen. d) The catalyst transfer system uses an “L” valve bank for lifting. The riser uses special elbows without right-angle bends to **reduce catalyst wear. e) Both the lift gas and leaching gas for the catalyst to be regenerated are supplied with nitrogen; separate lift fans and dust removal fans are used to circulate this nitrogen, thereby ensuring system safety and reducing the requirements for the dust collection system. f) Two sets of catalyst feeding systems were designed, which can not only replenish the catalyst lost in the system in a timely manner but also enable online catalyst loading and unloading without shutting down the plant. g) To protect the environment, the regenerated exhaust gas is washed with alkali before being released into the atmosphere. h) The regeneration system controls the catalyst regeneration flow rate through a lockhopper. i) It has a cold-circulation line for the catalyst inside the reactor, to prevent damage to the components within the reactor in case of an accident.

Your reconfiguration devices are similar to ours

Do all these units have light hydrocarbon isomerization units?