Concentrating evaporators – Film type – Moving film
Patent
1993-02-09
1996-07-23
Manoharan, Virginia
Concentrating evaporators
Film type
Moving film
159 171, 159 286, 159 46, 159 49, 159DIG8, 159 163, 165147, 165167, 202172, 202174, B01D 122, B01D 126, F28F 1308
Patent
active
055385931
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a thin film flow-down type concentrating machine, and more particularly to a machine for concentrating a raw liquid which is required to be concentrated to a high degree without sacrificing the flavor or deteriorating the quality, such as heat susceptible liquid including fruits (orange, pineapple, tangerine, etc. ), vegetables (onion, tomato, etc. ), livestock extract (chicken, beef, pork, etc.), and marine products (shrimp, oyster, fish, crab, etc.).
PRIOR ART
When concentrating a heat susceptible liquid, it is necessary to shorten the heat contact time with the steam heating element. It is accordingly desired to take out the raw liquid supplied into the concentrating equipment as a concentrate liquid by one pass. The present inventors previously developed a thin film flow-down type concentrating machine favorable for concentrating a heat susceptible liquid, and internationally applied as W090/09220.
This application had, however, a room for improvement concerning the concentration of the raw liquid that requires a higher degree of concentration. That is, when concentrating a raw liquid to a high degree, a multistep concentration method is employed, and the moisture in the raw liquid is evaporated and removed in steps by the concentrating equipment, and the concentration becomes higher and the liquid volume of the raw liquid decreases in the later steps, and the liquid volume becomes extremely small in the final step, and a dry portion appears on the heating surface, which has sometimes led to scorching or deterioration of quality. As this countermeasure, it may be considered to recycle a part of the concentrate to increase the liquid volume only at the final step, but in such a case the flavor is sacrificed in the case of heat susceptible liquid and the quality is lowered, and the concentration efficiency is also decreased.
The invention is intended to improve these points, and it is a primary object thereof to present a thin film flow-down type concentration machine capable of concentrating to a high degree perfectly by one pass.
SUMMARY OF THE INVENTION
To achieve the above object, the invention presents a thin film flow-down type concentrating machine for concentrating a raw liquid by heated steam by alternately laminating raw liquid plates and steam plates, in which the width of the heating path of raw liquid from the entrance of raw liquid till the exit of concentrate is gradually narrowed.
It is also a feature of the invention, aside from the above constitution, that the plate intervals are gradually widened from the entrance of raw liquid to the exit of concentrate.
Also in the invention, the plate intervals are gradually narrowed from the entrance of raw liquid to the exit of concentrate, and the width of raw liquid heating path is uniform from the entrance of raw liquid to the exit of concentrate.
Furthermore in the invention, the width of the raw liquid heating path from the entrance of raw liquid to the exit of concentrate is gradually narrowed, and an evaporated steam path is formed by the side of the heating path from an intermediate point of the heating path to the exit of concentrate. These and other features of the invention are better understood and appreciated from the following detailed description taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view of a raw liquid plate of the invention;
FIG. 2 is a front view of a steam plate of the invention;
FIG. 3 is a perspective exploded view showing schematically the constitution of a concentrating machine formed by alternately laminating raw liquid plates and steam plates according to the invention;
FIG. 4 is a side view of essential parts of arrangement state of plates showing a second embodiment of the invention;
FIG. 5 is a front view of a raw liquid plate in a fourth embodiment of the invention;
FIG. 6 is a front view of a steam plate in a fourth embodiment of the invention;
FIG. 7 is a magnified sectional view of li
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Masutani Kenzo
Sakai Yoshiharu
Hisaka Works Limited
Manoharan Virginia
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