a.

Sketch possible arrangements for the piping and valves for Figure 14-6. Note that every tank needs to be able to receive fresh washwater or overflow from the next higher letter tank, except for tank F, which receives overflow from tank A or no liquid when offline for the dump and load step. Also, tanks must be able send overflow to overflow product line or to the next lower letter tank, except tank A sends overflow to tank F, or no liquid when offline. Try to minimize the number of valves.

b.

Write a short operational procedure that the operators are supposed to follow.

Figure 14-6

Transcribed Image Text:

2 Load Step N LL F ZE E A Extract Solvent 1. Dump D B 0 Step N + 1 LL F E A 2. Load B C D Extract Solvent 1. Dump