Multiple effect evaporating apparatus

Abstract

Abstract A multiple effect evaporating apparatus has a plurality of vertical columns of effects, each column having an effect on the same level as each of the adjacent columns. Each effect has (1) a bundle of horizontal tubes above the bundle of tubes in the next lower effect, (2) a raw material liquid collecting means below the bundle of tubes having means therethrough for passing the collected liquid to the next lower effect, (3) a vapor inlet passage at one end of the bundle of tubes into which the tubes of the bundle open for permitting vapor to flow from the vapor inlet passage into the tubes, (4) a vapor outlet passage at the other end of the tubes into which the tubes open, and (5) a mist separator adjacent and along the bundle of tubes one side of which is in communication with the raw material liquid collecting means and the other side of which is in communication with the vapor outlet passage, The effects at the same level in the columns are positioned with the vapor inlet passages of all but one of the effects immediately adjacent and in communication with the vapor outlet passage. The effects at the level in the columns are positioned with the vapor inlet passages of all but one of the effects immediately adjacent and in communication with the vapor outlet passage of the next preceding effect in the direction of vapor flow through the effects. The vapor inlet of the one of the effects in each stage is immediately adjacent, when viewed in plane view and immediately below, when viewed in elevation, and in communication with the vapor outlet passage of the next preceding effect in the next higher level of effects in said apparatus. Means is provided for feeding steam to the vapor inlet passage of the one effect in the highest level of effects and for feeding raw material liquid to each of the bundles of each of the effects in the highest level of effects, and means is provided for collecting from the successive vapor inlet passages the condensate which condenses from the vapor therein.

Inventors

• 👤 M Takada

Bibliographic Details