DOWN-FLOW LIQUID FILM TYPE WHOLE EVAPORATOR, ONE-PASS WHOLE EVAPORATING METHOD OF LIQUID AND MEASURING METHOD OF GAS QUANTITY

摘要

PROBLEM TO BE SOLVED: To provide a down-flow liquid film type whole evaporator, down-flow liquid film type evaporating method and measuring method of gas quantity for evaporating 100% of liquid by one-pass without causing evaporating residual liquid with a practical heat transfer area.;SOLUTION: This down-flow film type whole evaporator 1 evaporates and vaporizes 100% of liquid by one-pass by making fluid flow down into a plurality of heat transfer tubes 7 heated at their outside. A liquid separator 3 for distributing and supplying liquid is provided at upper part of an upper part tube plate surface 8. A dam 6 having a cutout for equally guiding liquid from the tube plate surface to the respective heat transfer tube inside surfaces is fixed on upper end of the heat transfer tube. A metallic filler 9 for promoting heat transfer between the tube wall and liquid and preventing free fall of liquid drops is inserted into the heat transfer tube. Using the evaporator, 100% of liquid is evaporated by one-pass with a simple device and operation. By accurately measuring flow quantity of liquid before evaporation using such method, the wholly evaporated gas quantity is accurately and stably provided.;COPYRIGHT: (C)2004,JPO