Figure 20.22 shows the monochlorobenzene separation process introduced in Section 7.4. The process involves a flash vessel, V-100; an absorption column, T-100; a distillation column, T-101; a reflux drum, V-101; and three utility heat exchangers. As shown in Figure 20.22, most of the \(\mathrm{HCl}\) is removed at high purity in the vapor effluent of \(\mathrm{T}-100\). However, in contrast with the design shown in Chapter 7, the design in Figure 20.22 does not include a "treater" to remove the residual \(\mathrm{HCl}\); instead, it is purged in a small vapor overhead product stream in T-101. The benzene and monochlorobenzene are obtained at high purity as distillate and bottoms liquid products in T-101. Note that the 12 available control valves are identified. Your task is to design a conceptual control system to ensure that the process provides stable production at a desired level while meeting quality specifications.

Figure 20.22:-

Transcribed Image Text:

T-100 V-12 D cw HCI Purge CW E-101 V-2 V-101 V-100 T-101, V-7 Feed E-100 Figure 20.22 Process flowsheet for the MCB separation process. E-102 P-100 E-103 P-101 V-10 XV-9 Benzene CW mps MCB