Catalytic continuous reforming, UOP’s third-generation technology – who can provide measures for dealing with the situation where the reforming cycle hydrogen supply is interrupted and the process cannot be restarted?

The emergency shutdown plan should be written in detail

Possible interlock conditions, such as the high-level interlock for the liquid separation tank

The newly designed reforming unit now has a line from the compressor outlet to the hydrogen circulation pump outlet; under normal conditions there is no flow, but when the hydrogen circulation pump fails and cannot start, this line allows for the circulation of hydrogen, which helps to reduce temperature and carry oil in order to protect the catalysts and equipment. The rest can be handled as normal shutdown.

Once the circulating hydrogen compressor stops, the feed to the plant is shut down via interlock, as is the heating furnace. At this point, it is necessary to quickly cut off the hydrogen being sent outside in order to maintain the pressure in the reaction system. If the pressure in the reaction system is high, pressure must be released from the top of the product separation tank (plate exchangers are used for this purpose). With plate exchangers, a positive flow direction is maintained to ensure a small amount of gas flows through, thereby carrying away the heat from the heating furnace tubes and the reactor； Quickly close the fuel gas isolation hand valve of the heating furnace to prevent fuel gas from leaking into the furnace and causing an explosion. (It is possible to slightly increase the flue dampers to lower the temperature in the furnace, so as to avoid high-temperature materials inside the furnace being carried into the reactor upon restart of the circulation compressor and damaging the reactor’s internal components.) ； It is necessary to activate the Cooldown mode in order to keep the catalyst flowing within the reactor and protect its internal components from damage. Of course, it is also important to find ways to restore the operation of the cyclic hydrogen compressor.

It should also mention something about the shutdown of the booster pump

In simple terms, the entire system shuts down as a result of interlocks: the furnace is turned off, feed is stopped, the distillation tower switches to circulation mode, pressure is released from the high-pressure tank, the circulator’s drain valves are opened, and an electronic turning device is activated. It’s impossible to explain the specific procedures in just one or two sentences