FIELD: food industry.
SUBSTANCE: cooling water flow rate into the condenser and the dephlegmator of the first and the second distillating columns is regulated as a function of the difference between the preset and the current values of condensate temperature at the first and the second distillating columns dephlegmator outlet. One measures the variable current flow rate of the vat fraction from the first distillating columns onto the lower feed plate of the second distillating column and isolates the low-frequency component of values of the parameter being measured. One performs correction of the assignment by the pressure of the bottom of the first and the second distillating columns as a function of the difference between the preset specified flow rate of the vat fraction and the low-frequency component of current values of the vat fractions flow rate. During correction of assignments by the pressure of the bottom of the first and the second distillating columns, their value is decreased in case the difference value is positive and is increased when the difference value is negative.
EFFECT: invention allows to reduce specific expenditures of heating steam.
1 dwg
