Residue Flowrate Formula:
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Definition: This calculator estimates the residue flowrate from a distillation column based on the boil-up flowrate and boil-up ratio.
Purpose: It helps chemical engineers and process technicians determine the bottom product flow in distillation operations.
The calculator uses the formula:
Where:
Explanation: The boil-up flowrate is divided by the boil-up ratio to determine the residue flowrate.
Details: Accurate residue flowrate estimation ensures proper column operation, product quality control, and energy efficiency in distillation processes.
Tips: Enter the boil-up flowrate in mol/s and boil-up ratio (default 1.86). All values must be > 0.
Q1: What is the boil-up ratio?
A: The boil-up ratio is defined as the ratio of molar flowrate of vapour leaving the reboiler back into the column to the molar flowrate of liquid drawn out as bottom product.
Q2: What's a typical boil-up ratio range?
A: Common values range from 1.5 to 3.0, but this depends on the specific distillation process and desired separation.
Q3: How do I measure the boil-up flowrate?
A: The boil-up flowrate can be measured using flow meters or calculated from reboiler heat duty and vaporization enthalpy.
Q4: What affects the boil-up ratio?
A: Factors include feed composition, desired product purity, column pressure, and reboiler heat input.
Q5: Does this calculation account for column efficiency?
A: No, this is a theoretical calculation. Actual operation may require adjustments based on column efficiency.