Hydrogen coking phenomenon
Thread Content
What coking phenomena occur in the hydrogenation process? And how can some preventive measures be taken?
The reactor pressure drop increases； Large temperature indication deviation ； The heat exchanger does not have an effective heat exchange performance ； The gas consumption of the heating furnace increases, and it is difficult to raise the furnace temperature. Strengthen stable operation to maintain the circulating hydrogen flow rate and prevent the catalyst from overheating. Ensure uniform flow distribution in the furnace tubes. Selective hydrogenation of gasoline.
The pressure difference increased at an accelerating rate, and the plant was forced to shut down within a few days. When the same temperature is reached, the temperature in the furnace chamber rises significantly. The pressure difference between the inlet and outlet of the heat exchanger increases, resulting in poor heat exchange efficiency.
The reactor inlet temperature rises, and the pressure difference increases abnormally； The pressure difference at the inlet and outlet of the heat exchanger and air cooler increases. It is necessary to strictly control the reactor inlet temperature to prevent overheating, and ensure proper control of the amount of recycled hydrogen ； Pay close attention to changes in the pressure difference at the inlet and outlet of the heat exchanger, and address them promptly.