Norm Lieberman Quick Crude Distillation Pro Tip | RefinerLink
Cor
Cor

RL Blogs

image
Norm Lieberman Quick Crude Distillation Pro Tip

By Norm Lieberman

Jul 24, 2017
 

Key process monitoring tip for atmospheric crude distillation.

 
 

One of the most important aspects of crude unit monitoring is to measure the diesel content of the crude tower bottoms. Measure the 650 deg F (minus) (D-86 ASTM), which is basically diesel. Any number above 6% is excessive.


To reduce the diesel content of crude tower bottoms:

 

Reduce flash zone pressure -  A 2 psia reduction will have the same effect as raising flash zone temperature by 5 deg F. Increasing pumparound heat extraction will unload overhead condenser and reduce tower pressure. Next, try to increase tower bottoms stripping steam. A good number is 6 – 8 pounds of steam per barrel of atm resid.

 

Redesign stripping trays so that each tray develops 2” – 3” of dry tray pressure drop.

 

Raise flash zone temperature - A good heater outlet is 720 deg F - 735 deg F (max). A very low flash zone temperature is 680 deg F - 690 deg F, which equates to a heater outlet of 700 deg F.

 

 

Diesel losses to AGO are smaller than to atmospheric resid. 650 deg F minus (D-86) of 20%, or less, is excellent. 650 deg F minus in AGO of 35% plus is bad. Suggest using 10 – 12 lbs. per barrel of stripping steam. Much higher steam rates will accomplish little.

 

If LVGO and AGO are used as FCU feed, about 20% of diesel will be degraded to catalytic coke and fuel gas. The remainder will be LCO, with degraded cetane number.

 
Enjoy this content? Join our Free Newsletter    
  • Tone Win :   Application of Maize Meal Making Machine in South African Market There is no grade of maize meal, only the thickness of the other. Maize meal is rich in nutrients, according to the color distinction between yellow maize and white maize meal all kinds. Cornmeal food in the United States and its research found that maize contains a lot of lecithin, linoleic acid, cereal alcohol, vitamin E, cellulose, etc., with lower blood pressure, blood fat, anti-atherosclerosis, prevention of colorectal cancer, beauty beauty , Anti-aging and other health effects, but also suitable for diabetes to share. Mexicans are maize-based food, the state banquet is also a plate of maize food. Cornmeal can also be bait, the advantage is: you can highlight the strong smell of maize meal, carp favorite, carp grass carp often patronize. Making simple and convenient. Affordable and affordable. DNM-3B Maize Meal Making Machine has peeling, crushing, milling functions. It suitable for small size of food processing factories in maize, wheat and sorghum peeling, grits and flour milling. Maize Meal Making Machine Working principle: Maize Meal Making Machine consists of maize peeling, maize polishing, maize grits and maize meal making, end products classifying and winnowing. The clean raw grain is conveyed to the feeding port for peeling, degermination and black impurities removing and can be processed into corn kernels once. After smashing and mixture grading. Maize Meal Making Machine can produce three end products: medium grits, small grits and maize meal. Inside of Maize Meal Making Machine has highly efficient air draft chamber for collecting the maize skin from peeling process. Maize kernel size can be adjusted by grits making bolt. Grits granularity can be controlled by adjusting the diameter between the two fluted discs. http://www.flour-milling-machine.com/ Contact: wintone15@wintonemachinery.com Skype: Win Tone

    Jul 26, 2017

Do NOT follow this link or you will be banned from the site!

Blog Topics

 

People You May Know