【Q&A Question 072】2016.07.01
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This post was last edited by liuquan1100 on 2016-7-7 21:19. [Q&A Question No. 072] 2016.07.01: What are the reasons for the fluctuations in the outlet temperature of F101 in diesel hydrogenation? How to handle it? The answer key will be available after responding; scoring is based on answering the key points. 1. Fuel gas flow rate, pressure fluctuations. 2. Fluctuations in the operation of the reaction product and hydrogen-blended oil side lines. 3. Fill the tube side of the heat exchanger with water. 4. Fluctuations in feed rate and feed temperature. .
1. Fluctuations in feed volume. 2. The fuel quantity and composition change. 3. Change in reactor outlet temperature. 4. The crude oil contains water.
Changes in the properties of the feed material, unstable pressure at the gas plant, fluctuations in the flow rate of hydrogen mixed before the furnace – any of these could be the cause, as mentioned by the colleagues above. .
Unstable inlet temperature of the heating furnace, unstable feed rate, unstable gas flow, gas containing water, etc
Reason: 1. Changes in the raw material components； 2. Fuel gas composition and pressure fluctuations ； 3. Instrument signal failure Handling: 1. Contact the dispatch team for handling ； 2. Contact the dispatcher for handling ； 3. Contact the instrument maintenance personnel to handle it
Fuel gas pressure, feed rate, circulation rate
Reason: 1) Inaccurate adjustment； 2) Flame deflection ； 3) Uneven lengths ； 4) Improper adjustment of the damper ； Adjustment method: 1) First, adjust the flame ； 2) If a blockage is detected in the burner system, it should be removed and repaired ； 3) The dampers can also be adjusted appropriately to ensure complete combustion of the fuel ； 4) Be careful not to use too much air supply, to prevent the burner from having insufficient flame intensity
Adjust the fuel gas in response to fuel fluctuations, stabilize the processing volume in response to fluctuations in it, and stabilize the feed temperature in response to its fluctuations
1. Changes in the properties of the raw materials, 2. Changes in the composition of the fuel gas, resulting in a higher or lower calorific value, 3. Changes in the feed volume, 4. Instrumentation issues, 5. Fluctuations in the amount of circulating hydrogen
1. The amount of raw materials is unstable. 2. Temperature fluctuations of the raw materials before entering the heating furnace. 3. The hydrogen mixing amount at the inlet fluctuates greatly. 4. False readings on the instrument. 5. System pressure fluctuations. 6. Fluctuations in the temperature of the heating furnace. 7. If using dual feed routes, be careful as one of the furnace tubes may not be functioning properly.
Fluctuations in the furnace outlet temperature are generally caused by unstable flow rate at the outlet of the bottom pump, malfunctions of control valves, or uneven distribution of flow within the system. Another common cause is unstable combustion of the fuel gas, along with changes in its composition and unstable pressures; unstable furnace pressure is also a frequent issue