What should be noted when sharing a top reflux drum between the initial distillation column and the atmospheric column?
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The initial distillation tower and the atmospheric pressure tower share a top reflux tank. The gasoline in this tank is divided into three streams: one stream is used for reflux at the top of the initial distillation tower, another stream is used for reflux at the top of the atmospheric pressure tower, and the remaining stream is sent to the plant’s low-pressure gas tank for non-condensable gases. What impact does having two towers shared by one tank have on production?
For two towers and one tank, it is important to prevent cross-contamination; when flooding or overfilling of a tower occurs, the inlet valve to that tank should be closed promptly to avoid causing larger accidents in other towers.