JP2843886B2 - Three-liquid plate heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a three-liquid plate type heat exchanger for heat sterilization of food liquids and other general industrial fields.

[Conventional technology]

For example, when heat sterilization of a food liquid having a low sterilization temperature is performed using a plate heat exchanger, when heat is directly exchanged between steam and the food liquid, the liquid is heated to a temperature higher than the sterilization temperature, and the food liquid is scorched, When there is a problem such as deterioration of quality such as deterioration or adhesion of scale to a plate, it is common practice to use warm water as a heating medium.

As a device for this purpose, the system shown in FIG. 7 or FIG. 8 is conventionally known.

FIG. 7 shows the use of a heat exchanger (1) for hot water production, heat exchange between steam (2) and water (3) to produce hot water (4), and this hot water (4) and food liquid. (5) is subjected to heat exchange in a heat exchanger for heat sterilization (6) to perform heat sterilization.

FIG. 8 shows a configuration in which steam (2) is blown into water (3) by an in-line heater (1a) to produce hot water (4).

[Problems to be solved by the invention]

In the conventional method, the circuit of the heat exchanger (1) or the in-line heater (1a) for hot water production is required separately,
There is a disadvantage that the equipment cost increases.

The present invention has been proposed in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a three-liquid plate heat exchanger that does not require a separate circuit for producing hot water. is there.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a plate having an entrance and exit for three media by forming a passage for each media by surrounding an entrance and a heat transfer surface of the three media by three types of packing, Are individually surrounded by an annular packing, and each medium passage is a processing liquid passage, a liquid passage to be processed, and an intermediate medium passage at an intermediate temperature between these two media, and the intermediate medium passage is a processing liquid passage and a liquid to be processed. A medium passage at an intermediate temperature is arranged on both sides of the liquid passage to be treated, and this arrangement is repeated, and heat is exchanged by simultaneously flowing three media. It is.

[Action]

Since there is an intermediate medium passage between the treatment liquid passage and the liquid passage to be treated, the treatment medium first exchanges heat with the treatment liquid, and the intermediate medium exchanges heat with the treatment liquid.

〔Example〕

FIG. 1 is a schematic explanatory view showing an example of a passage arrangement of a three-liquid plate heat exchanger according to the present invention, wherein (A) is a treatment liquid passage such as steam, (B) is an intermediate medium passage such as hot water, (C)
Denotes a passage for a liquid to be treated such as a food liquid.

Between the processing liquid passage (A) and the liquid passage to be processed (C),
An intermediate medium passage (B) is arranged, and intermediate medium passages (B) are arranged on both sides of the liquid passage to be treated (C).

As a result, for example, the food liquid receives the heat of steam through the warm water.

 In FIG. 1, (10) is a pump.

Also, the intermediate medium (B) is not necessarily required during the heating operation of the food liquid or the like.
Does not need to be forcedly circulated, and in some cases, it can be operated even when the intermediate medium (B) is stopped and filled in the heat exchanger. Water is filled in the heat exchanger as the intermediate medium (B), and after the supply of the water is stopped, the processing liquid and the liquid to be processed are heat-exchanged. In this case, the hot water production line is further simplified as shown in FIG. 1A.

As shown in FIGS. 2 and 3, the spray used in the present invention is a three-medium port (11) (12) (13) (14) (1).
5) Use plates (17a) and (17b) with (16) facing up and down and forming a herringbone shaped corrugated bead in the center. However, the plates (17a) and (17b) are used by turning the same plate upside down.

As shown in FIGS. 4 to 6, the passage section of each medium is formed by three types of packings (18), (19), and (20) so as to surround the pair of entrances and exits and the heat transfer surface. Passage (A)
(B) and (C) are formed, and the remaining entrance and exit are surrounded by an annular packing (21) so as to pass therethrough.

〔The invention's effect〕

According to the present invention, there is a problem in quality and scale in heating by steam, and it is suitable for use in heating a food liquid or the like desirably heated with hot water, and a circuit for producing hot water as in the related art is omitted. can do.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an example of a passage arrangement of a three-liquid plate type heat exchanger according to the present invention, FIG. 1A is a schematic explanatory view of a modified embodiment of the present invention, and FIGS. 4 to 6 are plan views of a plate showing an example of forming a passage for three media, and FIGS. 7 and 8 are circuit diagrams of a conventional system. is there. (A): treatment liquid passage; (B): intermediate medium passage; (C): treatment target passage.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F28D 9/00-9/02 F28F 3/00-3/14

Claims (1)

(57) [Claims] 1. A plate having an entrance / exit for three media is formed by three types of packing so as to surround the entrance / exit and the heat transfer surface of the three media to form a passage for each medium, and the entrance / exit of the other two media is annularly packed. And each medium passage is a processing liquid passage, a liquid passage to be processed, and an intermediate medium passage at an intermediate temperature between these two media, and the intermediate medium passage is disposed between the processing liquid passage and the liquid passage to be processed. And a medium passage at an intermediate temperature is disposed on both sides of the passage of the liquid to be treated, and this arrangement is repeated, and heat exchange is performed by simultaneously flowing the three media. Plate heat exchanger.