초록 ▼

A vapor compression distiller has a vertically oriented cylindrical tank and a heat exchanger having a plurality of groups of heat exchange tubes disposed one above the other. Internal baffling channels vapor through the groups of heat exchange tubes in a serial relation commencing with the vertical

A vapor compression distiller has a vertically oriented cylindrical tank and a heat exchanger having a plurality of groups of heat exchange tubes disposed one above the other. Internal baffling channels vapor through the groups of heat exchange tubes in a serial relation commencing with the vertically lowest group. Feed liquid is distributed from the upper end of the vessel downwardly over the surfaces of the tubes. This causes the evaporation of a first portion of the feed liquid and a condensation of the vapor. The evaporated and unevaporated portions of the feed liquid pass downwardly past the heat exchange tubes with the unevaporated portion collecting in a liquor well at the lower end of the vessel and the vapor passes upwardly along the sides of the vessel heat exchanger and outwardly to a compressor, the outlet of which is connected to the vapor inlet of the system. In a second embodiment, an additional evaporator is disposed below the first wherein the unevaporated feed liquid from the first evaporator is provided as the feed liquid of the second while the vapor withdrawn from and delivered to the second evaporator is connected in parallel with that of the first.

대표청구항 ▼

An evaporator including: a generally vertically oriented vessel having a longitudinal axis, heat exchange means disposed within said vessel and intermediate the ends thereof and including a plurality of generally horizontally extending heat exchange tubes and a pair of tube sheet means arranged in s

An evaporator including: a generally vertically oriented vessel having a longitudinal axis, heat exchange means disposed within said vessel and intermediate the ends thereof and including a plurality of generally horizontally extending heat exchange tubes and a pair of tube sheet means arranged in spaced relation for supporting said heat exchange tubes, a plurality of partition means disposed adjacent said heat exchange tubes and engaging with said tube sheet means for defining an evaporating space, said heat exchange tubes extending through said evaporating space, said heat exchange means being spaced from the upper and lower ends of said vessel to define a first vapor collecting space in said vessel above said heat exchange means and a second vapor collecting space in said vessel below said heat exchange means, said tube sheet means and said partition means being spaced from said vessel and defining therewith a plurality of continuous and spaced apart vapor passages extending generally vertically, the opposite ends of said heat exchange tubes extending between first and second ones of said passages and at least one additional vapor passage extending between and interconnecting said vapor spaces, said partition means isolating said first and second passages from said vapor spaces, a plurality of baffles disposed in each of said first and second passages, the baffles in each passage being arranged in a vertically staggered relation one to the other and at different elevations than those of the other whereby the heat exchange tubes are divided into groups with the inlet and outlet ends of the tubes of adjacent groups isolated so that the vapor is routed back and forth through adjacent groups of said heat exchange tubes, cover means disposed above said evaporating space for separating the same from said first vapor collecting space, a feed liquid distributor disposed above said heat exchange means for distributing feed liquid downwardly over said heat exchange tubes, a vapor inlet connected to one of said first and second passages and a vapor outlet connected to said first vapor collecting space.