In the thermal bypass control of the stabilizer tower, is the control valve FC or FO?
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As the title suggests, in the thermal bypass control scheme for the stabilizer, where both the thermal bypass and the vent line control valve on the tank top are used for proportional control, should the thermal bypass control valve be a gas-actuated open valve or a gas-actuated closed valve?
A normally open valve should be selected, which means it shuts off in case of a fault. In this way, the tower will not experience overpressure.
Type FC: The main purpose of the thermal bypass is to regulate the pressure in the return tank. As for the control of the top pressure of the tower, it is controlled by the opening degree of the top pressure control valve
Type FC: this valve is actually used to repressurize the return tank
I’d like to ask the experts: why is it necessary to place the condenser below the reflux tank in a heat bypass system? Can’t it be placed above? Could you please explain in detail as I don’t understand it