MY188688A - Multistage distillation system, method for operating same - Google Patents

Abstract

The invention relates to a multi-stage distillation system (1) having stages Si, where i = 1, ... n, wherein during operation, each stage Si works in a higher pressure and temperature range (Pi, Ti) than the following stages Si+ 1, wherein each stage Si comprises an evaporator Ei and a condenser Ci, wherein each evaporator Ei and each condenser Ci comprises a pressure-tight container (2) having a steam chamber (6), wherein the steam chamber (6) of each evaporator Ei is in pressure-connection with the steam chamber (6) of the condenser Ei of the same stage Si via a steam pipe (7) having a large cross-section. Each outlet (5) of each evaporator Ei is connected to a spray inlet (3) of the next evaporator Ei + 1, and the outlet (5) of the last evaporator En is connected to the spray inlet (3) of the first evaporator El with a respective fluid line (8) to form an evaporator circuit, and each outlet (5) of each condenser Ci is connected to the one pray inlet (3) of the previous condenser Ci-1, and the outlet (5) of the first condenser Cl is connected to the spray inlet of the last condenser Cn with a fluid line (9) to fom1 a condenser circuit. According to the invention, at least one steam line (10) is connected by a first end to one of the fluid lines (9) between condensers Ci+ 1 and Ci or to the fluid line (8) between the evaporators En and El, and is connected by a second end to a steam chamber, which, during operation, has a higher pressure P than the pressure Pi in the steam chamber (6) of the condenser Ci or than the pressure Pl in the steam chamber (6)of the evaporator El. The invention also relates to a method for carrying out a distillation in a system according to the invention, as well as a controller.