The double block and bleed system shown in Figure 13-2 is a design feature often added to all monomer feed lines. However, it has one problem: It creates another tank with a hazardous monomer. Develop a new design of the double block and bleed system that is inherently safer than the one shown in Figure 13-2.

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(TRC) (PRC) Reactor Block Valves, Double block and bleed: When the reactor pressure or temperature is high, or when the pump fails, then close the block valves and open the bleed valve. Bleed Valve Figure 13-2 Double block and bleed system. Monomer Storage Tank