Issues regarding equipment selection for the process design of an annual production capacity of ** tons of products
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I’ve read most of a master’s thesis from East China University of Science and Technology titled \"Process Design for Annual Production of 5,000 Tons of Resorcinol.\" There are some aspects I still don’t understand: the material balance is based on mass flow rates in kg/h, while the heat balance is established on the basis of the material balance. Equipment selection is determined based on both the material balance and mass balance. However, in reality, the equipment isn’t operating continuously; it operates intermittently, with reaction times and times for feeding and discharging materials, and the duration of each process varies. Thus, not all equipment is in use at all times. The thesis doesn’t provide specific calculations for equipment selection, and I really can’t figure out how to determine the mass flow rate or calculate the required volume and heat exchange area of the equipment. I would appreciate guidance from experts or professional designers
It would be better if you posted the process flow diagram. For this type of process, the filling rate of the reaction vessel can generally be increased to 70-85%. The calculation for the heat exchanger depends on the time required for feeding or discharging materials. If the extraction tank is also used for batch production, the calculations are the same as those for the reaction vessel
Based on mass balance, it is possible to determine the weight of the mixture per hour; multiplying this by the residence time gives the mass. Dividing this mass by the density yields the volume, and dividing that result by 0.75 gives the calculated volume of the reactor, which is then rounded up...... Based on energy balance and reaction kinetics, it is possible to determine whether heating or cooling is required to remove the heat generated during the reaction. The type of heat exchanger to be used is chosen based on parameters such as heat flow rate.