Reasons for the high steam consumption in crude benzene processing
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Does our company consume more than 2 tons of steam to produce 1 ton of crude benzene? I don’t know why? The reflux flow rate of Rich Oil 163 is below 4.5, and the product flow rate at the tower top 83 is above 93
The oil-rich stream has a low temperature and high backflow rate, so it requires a large amount of steam
Both the oil-rich temperature and the top of tower temperature are low, which results in high steam consumption.
The indicators do not meet the standards, resulting in energy waste. 92 at the top of the Rich Oil 180 tower – take another look
3# ryn: Is a too high oil richness temperature not good for the washing oil? Will the viscosity increase?
3# ryn: Our production volume and quality are up to standard. The benzene content behind the tower is below 1, and the benzene content in the lean oil is also below 1. So will there be any impact after making these adjustments?
The oil-rich stream temperature is definitely too low, and the vapor at the top of the tower is also low; the reflux rate should be adjusted accordingly based on the vapor at the top of the tower.
Your parameters are definitely not up to standard; the desired temperature is 180 degrees, while the temperature at the top of the tower is 93 degrees. . .
I’d like to ask those upstairs: what is your steam consumption per ton?
The poster should clarify the question further: what is the capacity of coking at your plant in tens of thousands of tons? What type of benzene removal tower is used? Is the steam used only in the regenerator or also at the bottom of the benzene removal tower? Given the low temperature of the rich oil as you mentioned, it must be that a large amount of steam is being introduced at the bottom of the benzene removal tower to raise the temperature of the rich oil to 180 degrees
10# Coking AC – Thank you so much! Your words helped me understand things right away. Haha, it must be that the temperature of the rich oil is too low. I was worried that if the temperature of the rich oil was too high, the viscosity of the washing oil would increase. Now I understand that the temperature of the rich oil also rises inside the benzene washing tower; therefore, the temperature of the rich oil doesn’t affect the viscosity of the washing oil.