Factors affecting reaction temperature and their reasons

1. The properties of the raw materials have a significant impact; the sulfur content and olefin content in the raw materials directly affect the degree of temperature rise. 2. Catalyst activity: A highly active catalyst leads to higher hydrogenation efficiency, thereby resulting in a greater temperature rise, while a less active catalyst results in a lower temperature rise. 3. Reactor inlet temperature: Higher temperatures increase the catalyst’s activity and intensify the reaction, leading to a higher temperature rise; lower temperatures result in a lower temperature rise. 4. Processing load: A higher load generates more heat. 5. Amount of cold hydrogen: An excess of cold hydrogen reduces the temperature inside the reactor, thereby decreasing reaction activity. 6. Flow rate of recycled hydrogen: A higher flow rate carries away more heat, while a lower flow rate results in higher temperatures

Factors affecting it: (1) Changes in the catalyst circulation rate; an increase in the circulation rate leads to an increase in the reaction temperature； (2) The total feed rate to the lift pipe changes; as the feed rate increases, the reaction temperature decreases ； (3) Changes in feed composition, increased raw material weight, and decrease in reaction temperature ； (4) Moisture in the raw material leads to a drop in reaction temperature ； (5) Variation in raw material preheating temperature ； (6) Variation in the stripping steam volume of the settler. The amount of stripping steam decreases, the temperature of the regeneration bed rises, and the reaction temperature increases ； (7) Changes in regenerator bed temperature ； (8) The dose required to terminate the reaction is high, and the reaction temperature decreases ； (9) Changes in the amount of pre-heating steam and feed atomization steam ； (10) Change in differential pressure between the two devices ； (11) The regenerative spool valve is not sensitive enough for adjustment ； Adjustment method: (1) Under normal conditions, adjust the opening degree of the regeneration slide valve to control the catalyst circulation rate, thereby regulating the temperature at the outlet of the riser. (2) Control the feed volume for each stream; any adjustments should be made gradually. (3) Adjust the amount of re-refined oil and re-refined oil slurry in a timely manner. (4) Contact the tank farm to enhance dehydration. (5) Adjust and control the raw material preheating temperature. (6) Control the amount of stripping steam properly. (7) Control the dense-phase bed temperature of the regenerator properly. (8) Adjust the termination dose according to the actual situation. (9) The steam flow rate entering each lift pipe must be kept stable. (10) Strengthen operations to maintain a proper differential pressure between the two devices. (11) Contact the instrument; the maintenance personnel will investigate the cause of the instrument.