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I have compiled all the posts related to pressure drop in the oil refining technology exchange area, so as to make it easier for everyone to search, save time, find what they need, and assist others in solving problems! Floor 1: 1–39 (Click on the titles directly to access the hyperlinks) 1. What are the reasons for excessive pressure drop in the hydrogenation reactor bed? 2. Pressure drop in the hydrocracking reactor. 3. Pressure drop in the cyclone separator. 4. Investigation of the conditions in the hydrogenation and refining reaction system (mainly regarding pressure drop). 5. Methods to reduce the pressure drop in the catalytic distillation tower? 6. Pressure drop of the settler 7. Abnormal pressure drop in the primary spin section of the settler in the 600,000 tons/year RFCC unit? 8. Factors affecting the pressure drop at the top and bottom of the distillation tower 9. The single-stage pressure drop in the catalytic settler reaches 7–8 Kpa 10. Catalyst circulation rate and the pressure drop in the riser 11. Analysis of the head removal situation and reasons for pressure drops in Yanshan Petrochemical’s RMC unit 12. Pressure drop problems in catalytic cracking 13. Pressure drops in the inner and outer loops 14. Issues related to pressure drops in catalytic cracking reactors? 15. What is the maximum allowable total pressure drop across the bed of the diesel hydrodesulfurization reactor? 16. Excessive changes in the pressure drop of the distillation column. 17. Pressure drop and throughput in oil and gas pipelines. 18. Discuss the issues related to the pressure drop in the distillation columns of your catalytic units. 19. Pressure drop in three-cyclone systems. 20. Problems related to pressure drops in catalytic cracking units. 21. High pressure drop in the distillation column and high bottom temperature in heavy oil catalytic cracking units. 22. An increase in the pressure drop at the outlet of the riser, whether in a multi-cyclone or single-cyclone system, what does it indicate? 23. Why does the pressure drop in the cyclones increase at first when carbon buildup occurs? 24. How to analyze the pressure drop in a distillation column? 25. Changes in pressure drop in catalytic and coking distillation columns. 26. How to deal with high pressure drop in the empty tubes of a converter? 27. How to address high pressure drop in a distillation column? 28. Pressure drop of the catalytic main air in the auxiliary combustion chamber? 29. Impact of the pressure drop in the waste heat boiler of the catalytic unit on the smoke extractor. 30. Issues related to reducing the pressure drop in the distillation system. 31. What is the cause of the alarm for the lower limit of the slide valve pressure? How to operate it? 32. What are the measures to reduce the pressure drop across the bed of the hydrorefining reactor? 33. What causes a sudden increase in the rough spinning pressure drop? 34. What causes a sudden decrease in the rough spinning pressure drop? 35. What is the pressure drop of the heating furnace? 36. Pressure drop calculation. 37. Value of pressure drop for the herringbone trays in the catalytic fractionation tower. 38. Pressure drop in the FCC regenerator bed. 39. Issues regarding fluctuations in pressure drop in PV-type cyclones???