Seeking advice on benzene washing efficiency
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The benzene level behind the tower in our plant is currently below 3, but the company requires it to be below 2. Do you have any good suggestions on how to adjust this? Indicator ； Oil wash 270 flow rate 95, lean oil benzene content 0. 03 Rich oil contains 0% benzene. 68, regenerator bottom temperature 198, top temperature 183, rich oil temperature 183, superheated steam 447, lean oil temperature in the upper benzene washing tower 30 degrees, coal gas temperature entering the benzene washing tower 26 degrees. There are no issues with the resistance in any of the towers, and the steam pressure is normal. The circulation rate of the washing oil is 180
How is the quality of crude benzene? Based on the data you provided, the benzene content in the rich oil is too low. Calculate the flow rate of the rich oil as required to determine whether it exceeds the design capacity of the benzene removal tower
What is the size of the coke ovens in your factory? Check whether the gas volume matches the oil washing circulation volume.
1. Reduce the temperature of the lean oil in the upper benzene washing tower and the temperature of the gas entering the benzene washing tower; the temperature of the lean oil in the upper benzene washing tower is 23 degrees, and the temperature of the gas entering the tower is 22 degrees. 2. Increase the benzene content in the rich oil, and enhance the circulation of the benzene-removed rich oil.
The circulation volume of the washing oil is higher than what was initially specified; with an initial design capacity of 100,000 units of gas to be processed, it’s not possible to maintain the required temperature. The heat exchangers used for ammonia washing do not meet the standards – we have already analyzed this issue. Is there any other way to solve it? Adjusting the coal gas flow rate – is this method viable? Please share some suggestions. The quality of crude benzene is above 94 before reaching 180, so there’s no issue with its quality
Judging from the above indicators, energy consumption is likely to be quite high; it’s not worth it
If the distillate volume of crude benzene is high, the top temperature of the tower can be increased slightly or the reflux rate can be reduced to lower the benzene content in the lean oil.
Hehe, how many ten thousand tons of coke do you produce per year? Why is the oil circulation volume so high? Energy consumption is also high. The oil content is too low, which is why the benzene level after the tower is high; in our company it’s around 1.
The benzene content in the rich oil from our factory is around 1.2 to 1.5; it’s too low in your area
Haha, today I made another sample with 0 benzene content. 05: The oil deficiency temperature is 34 degrees. There are no problems with the benzene removal system at present; the issue lies in the poor efficiency of the benzene washing tower. Our annual production capacity is 4.5 million tons, with three chemical processing workshops – I’m referring to one of them
Let’s see how effective the oil-poor spray is in the benzene washing tower Is the nozzle clogged or corroded, resulting in uneven spraying and poor atomization?