How to prevent the tail gases of several atmospheric distillation columns from mixing with each other?
Thread Content
Several atmospheric distillation columns are installed within one framework, and the materials processed by them vary. Since they share a single exhaust gas main, there is a risk of cross-contamination of the exhaust gases. How can this cross-contamination be prevented?
Check valves can be installed on each branch pipe
Check valves are of little use for gases with such low pressures.
Good topic. But what I’ve seen usually involves shared exhaust manifolds; perhaps the performance requirements for the products I’ve dealt with are low. If you don’t mind the hassle, you can consider carrying out exhaust gas adsorption treatment for each one before connecting them to the main pipeline
Install a water seal tank. The off-gases from the distillation tower enter the main off-gas pipe through their respective water seal tanks
Could the exhaust pipes of each respective material be directly connected to the spray tower for absorption? Although this would require more pipes, it could solve the problem of cross-contamination between the exhaust gases；
Would operating the spray tower under slight negative pressure be better?
It’s not possible to put it back; in case the pressure in one of the towers rises, it still won’t work.
That way, there will be more exhaust towers.
What about materials that generate wastewater and cannot come into contact with water?