【Q&A Question No. 099】2018.04.09
Thread Content
【Q&A Question 099】April 09, 2018: Briefly explain how the temperature at the top of a fractional distillation tower is controlled Just name five. (1) Adjusting the reflux flow at the tower top (main method) ； (2) Control the cooling temperature of air cooling properly ； (3) Adjust the side-line extraction volume ； (4) Adjust the feed rate and feed temperature ； (5) Adjust the amount of stripping steam ； (6) Control the temperature of the hot high-solids mixture well ； (7) If the instrument is malfunctioning, switch to manual control and contact the instrument team for repair. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go to the link below: https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space – the dedicated section for registered users, along with the voting thread for the “My Registration Season” event: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1954223. The app’s short video segment and skill competition have now begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Feed temperature and flow rate, reflux temperature and flow rate, bottom vapor temperature of the tower, product flow rate, top reflux flow rate
1. Control the backflow at the top of the control tower； 2. Control the reflux temperature at the top of the tower ； 3. Control the mid-section return flow rate and temperature, or the feed temperature ； 4. Control feed composition ； 5. Control the temperature at the bottom of the tower.
(1) Adjust the steam injection volume in a timely manner in response to changes, keeping it within the specified range； (2) Water carried back by the reflux will cause the temperature at the top of the tower to rise; therefore, it is necessary to enhance reflux dehydration and adjust the water level in the oil-water separator to stay within the normal range ； (3) After fluctuations in system pressure, rapidly increase the turbine speed to maintain stable system pressure ； (4) Once the instrument fails, immediately switch from automatic control to manual control, while monitoring temperature changes. When manually controlling the temperature at the top of the tower, adjustments to the reflux flow rate must be made slowly and promptly, and relevant personnel should be contacted for assistance ； (5) Fluctuations in the top circulation flow rate have a significant impact on the tower top temperature; immediate action must be taken. If automation is problematic, switch to manual control ； (6) When there is a problem with the pump, replace it promptly or use cold reflux to control the temperature at the top of the tower.
1. Control the backflow at the top of the control tower； 2. Control the reflux temperature at the top of the tower ； 3. Control the mid-section return flow rate and temperature ； 4. Control feed composition ； 5. Control the temperature at the bottom of the tower.
Feed temperature and flow rate, reflux temperature and flow rate, bottom vapor temperature of the tower, product flow rate, top reflux flow rate
(1) Adjust the steam injection volume in a timely manner in response to changes, keeping it within the specified range； (2) Water carried back by the reflux will cause the temperature at the top of the tower to rise; therefore, it is necessary to enhance reflux dehydration and adjust the water level in the oil-water separator to stay within the normal range ； (3) After fluctuations in system pressure, rapidly increase the turbine speed to maintain stable system pressure ； (4) Once the instrument fails, immediately switch from automatic control to manual control, while monitoring temperature changes. When manually controlling the temperature at the top of the tower, adjustments to the reflux flow rate must be made slowly and promptly, and relevant personnel should be contacted for assistance ； (5) Fluctuations in the top circulation flow rate have a significant impact on the tower top temperature; immediate action must be taken. If automation is problematic, switch to manual control ； (6) When there is a problem with the pump, replace it promptly or use cold reflux to control the temperature at the top of the tower.
(1) Adjusting the reflux flow at the tower top (main method)； (2) Control the cooling temperature of air cooling properly ； (3) Adjust the side-line extraction volume ； (4) Adjust the feed rate and feed temperature ； (5) Adjust the amount of stripping steam ； (6) Control the temperature of the hot high-solids mixture well ； (7) If the instrument is malfunctioning, switch to manual control and contact the instrument team for handling
This post was last edited by Sea Blue Homeland on 2018-4-9 at 09:34. 1. Adjust the backflow rate at the top of the tower； 2. Adjust the amount of stripping steam ； 3. Adjust the side-line extraction volume ；
Feed temperature, reflux rate, bottom temperature of the tower, top pressure of the tower,
1. Control the backflow at the top of the control tower； 2. Control the reflux temperature at the top of the tower ； 3. Control the mid-section return flow rate and temperature ； 4. Control feed composition ； 5. Control the temperature at the bottom of the tower.