Three major balances in the rectification tower of the Rectisol process
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How to calculate reboiler steam consumption
The three balances in the rectification tower of the Rectisolve™ process are: material balance, thermal balance, and vapor-liquid equilibrium. The formula for calculating the steam consumption of a reboiler is: Q = (G2-G1) * ΔH / η, where Q represents the amount of steam required by the reboiler, G1 and G2 are the flow rates of the alcohol-water mixture respectively, ΔH is the enthalpy change of the alcohol-water mixture, and η is the thermal efficiency of the heat exchanger. .
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In the rectification tower of the Rectisol process, its three major equilibria include gas-liquid equilibrium, phase equilibrium, and mass transfer equilibrium. To calculate the steam consumption of a reboiler, the following parameters are required: reboiler feed flow rate, reboiler feed temperature, reboiler outlet temperature, the amount of heat that needs to be removed from the reboiler (including the vaporization heat of the solvent and other heat transfer mechanisms), and the distillation time achievable under those operating conditions.