Patent ID: 8281498
Filing Date: 2012-10-09
Classification: B01B,B01D,F26B

Abstract:
1. An evaporator for evaporating an organic solvent comprising: a fluid tube including at least a first fluid tube part and a second fluid tube part, each of the first fluid tube part and the second fluid tube part being a helical shape, and the second fluid tube part being connected at a downstream side of the first fluid tube part through connecting pipe; a liquid organic solvent supply device configured to supply only organic solvent liquid to one end of the first fluid tube part; and a heating unit disposed inside each of the helical shape of the first fluid tube part and the second fluid tube part in such a way that the center of the heating unit approximately coincides with the center of the first fluid tube part and the second fluid tube part, and configured to heat each of the first fluid tube part and the second fluid tube part independently such that the organic solvent liquid is maintained substantially at a liquid state in the first fluid tube part and at a liquid/vapor mixed state in the second fluid tube part, wherein the first fluid tube part is designed to have a first cross section suitable for the liquid state and the second fluid tube part is designed to have a second cross section larger than the first cross section suitable for the liquid/vapor mixed state, and the organic solvent liquid supplied to the one end of the second fluid tube part is heated to be discharged as an organic solvent vapor from the other end of the second fluid tube part without being mixed with an inert gas.