JPH018864Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present invention relates to a three-liquid spiral heat exchanger used, for example, in an evaporator. Conventional Structures and Problems Conventional spiral heat exchangers are generally considered to exchange heat between two liquids, and there is no one that has realized heat exchange between three liquids. Purpose of the invention The present invention enables heat exchange between three liquids, and in particular, doubles the capacity by flowing the fluid as the heating medium through every other channel, and also allows a different fluid to be used as the heating source. The present invention aims to provide a spiral heat exchanger that realizes effective use of thermal energy. Structure of the invention In order to achieve the above-mentioned purpose, the present invention consists of four band-shaped heat exchanger plates that are wound in a spiral shape at regular intervals in parallel.
The end edges of both sides are open at every other spiral, and lids are attached to both sides and sealed to form four independent channels A, B, C, and D. Attach fluid inlets and outlets at two locations in the center of the lid body and four locations on the outer periphery at the end of the winding, and flow the same fluid a into every other channel A and C, and flow the same fluid a into the remaining channels B and D. This is a three-liquid spiral heat exchanger configured to flow fluids b and c that can exchange heat with fluid a and have no significant temperature difference between them. One of the three fluids, for example as a medium to be heated, is caused to flow through channels A and C of the four channels, thereby
Get double the capacity. In addition, by flowing through the flow paths B and D, the two fluids serving as heating sources can exchange heat from both sides of the fluid through the heat exchanger plate, resulting in a significant temperature difference between the two fluids. On the other hand, the fluid is appropriately heated, making it a suitable method of use as preheating. DESCRIPTION OF EMBODIMENTS Hereinafter, drawings shown as embodiments will be explained. In Fig. 1, the belt-shaped heat exchanger plates 1, 2, 3, 4 are flattened.

[Table] As shown above, there is not a very large temperature difference between concentrate b and drain c, and they can be used sufficiently to preheat fluid a, which is the stock solution, and twice the volume of the stock solution can be flowed. , it is clear that the heat exchange efficiency is high. Effects of the invention The present invention can efficiently exchange heat between three liquids as described above, can simultaneously exchange heat with twice the volume of fluid a as a heating medium, and can also be used as a heating source. This has great practical effects, such as using different types of fluids for fluids b and c and effectively utilizing the thermal energy of each fluid. In addition, although it was explained as a medium to be heated and a heat source for the purpose of explanation, it is of course possible to use it as a refrigerant.

[Brief explanation of the drawing]

Figure 1 is a plan view showing how the band-shaped heat exchanger plates are wrapped in a spiral heat exchanger, Figure 2 is a side view of the spiral heat exchanger, and Figure 3 is a structure showing an example of application to an evaporative compression evaporator. It is a diagram. 1, 2, 3, 4... Band-shaped heat exchanger plate, 5, 6... Lid, 7, 8, 9, 10, 11, 12, 13, 14
...Fluid inlet/outlet, A, B, C, D...flow path,
a, b, c...fluid.

Claims (1)

[Scope of utility model registration request] Four belt-shaped heat exchanger plates are placed in parallel at regular intervals,
Wrap it in a spiral shape, seal the open end edges on every other spiral, attach lids to both sides, and seal them to create four independent channels A, B,
C and D, with two fluid inlets and outlets installed in the center of both lids and four fluid inlets and outlets on the outer periphery of the end of the winding, and every other channel A, C.
A three-liquid spiral heat exchange characterized in that the same fluid a is flowed through the remaining flow paths B and D, and fluids b and c, which can exchange heat with the fluid a and have no significant temperature difference between them, flow through the remaining flow paths B and D. vessel.