JPH0437113Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is an external device used in the field of chemical equipment, food industry, especially fermentation tanks and fermentation product storage tanks that require temperature control for miso, soy sauce, etc. This invention relates to a reinforced plastic tank (hereinafter, in the present invention, all reinforced plastic tanks will be simply referred to as tanks) equipped with a heating and cooling device.

[Conventional technology]

Conventionally, to heat and cool a tank, a device has been used that involves wrapping a pipe around the outer circumference of the tank and circulating hot and cold water through the pipe to heat and cool the contents of the tank. When used, the contact area between the tank surface and the hot water and cold water pipes is small, resulting in a poor heat exchange rate, which not only makes it impossible to properly raise and lower the temperature of the tank contents, but also prevents heating and cooling.
There is a problem in that the running costs required for cooling are high, and therefore there has been a strong demand, especially from the fermentation industry, for a tank equipped with a more efficient heating and cooling device.

[Problem that the invention attempts to solve]

The present inventor believes that the heat exchange efficiency required for heating and cooling the conventional tank contents from the outside is low, which not only affects the quality of the product of the tank contents but also leads to high energy running costs. As a result of intensive studies to improve the heat exchange efficiency in heating and cooling the tank contents from the outside and to meet the demands of the above industry, we have developed this invention that allows hot water or cooling water to flow through the pipe walls. We completed this invention after confirming that direct contact with the tank instead of through it increases the heat exchange rate, lowers energy running costs, and makes it easier to switch between heating and cooling. Ivy.

[Means for solving problems]

In this invention, a pipe made of synthetic resin foam such as polyurethane foam or polyethylene foam, which has an approximately semicircular cross section or a square pipe, is directly wrapped spirally around the tank surface and glued onto it.
We provide a tank equipped with a heating and cooling device in which an FRP overlay is provided to cover the outer surface of the piping, adhesively fixed to the outer surface of the tank, and the entire tank is covered with heat insulating material on the outermost surface. It is something to do.

The present inventor's research has revealed that a synthetic resin foam with low piping resistance, high cleanliness, and low surface roughness is suitable for pipes with an approximately semicircular or square cross section that are spirally wound directly around the tank surface. For example, polyurethane foam or polyethylene foam has proven suitable. By using piping made of such materials, we were able to successfully reduce initial costs and running costs.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Fig. 1 is an overall sectional view of one embodiment of the present invention;
Figure A shows a pipe 2 with an approximately semicircular cross section, and Figure B shows a pipe 2' with a rectangular cross section, each glued to the outer surface of the tank 1, covered with an FRP overlay 3, and fixed to the tank surface. , further showing a partial cross-sectional view in which a heat insulating material layer 5 is provided over the entire outermost surface.

The pipes 2 and 2' were made of urethane foam or polyethylene foam. 4 is a heat insulating material layer or an air layer. 6 is a passageway for hot water or cooling water, which is wound spirally around the tank surface (Fig. 1). 7
is the fluid content, such as miso, soy sauce, etc., which requires temperature control during fermentation production. 8 is an inlet for hot water and cold water, and 9 is an outlet for hot water and cold water.
The hot water or cold water discharged from 9 is circulated by a pump to the inlet of 8 for circulation, or it is temporarily stored in a tank and then supplied to the inlet 8 by a pump (not shown). The heat insulating material 5 covering the entire outer surface may be made of any material, but synthetic resin is preferred.

[Effect of idea]

The effects of this invention can be summarized as follows.

(a) In this invention, hot water and cold water are in direct contact with the outer wall of the tank, so it is significantly more effective in heat exchange than the conventional case where pipes are wrapped around the tank.

(b) The periphery of the pipes through which hot and cold water flows is directly
The FRP overlay is directly bonded to the FRP tank, so the FRP is bonded to the FRP.
No other means are used, and the FRP tank is covered safely and securely without any damage due to the simple adhesive work. Furthermore, an air layer is left on the entire outer circumference, and a plastic insulation material is provided to completely insulate the tank from heat and cold.
The temperature difference at the outlet is small, and running costs are greatly reduced. The materials that form the framework of the base are all made of plastic, so there are few types of raw materials, and all of the work is done by gluing, so there is an advantage that the assembly of the device of this invention is simple and easy.

(c) Heat exchange between the top and bottom of the tank can be carried out smoothly, so there is no need to create a large temperature difference between the hot water, cold water and the contents of the tank.Furthermore, since the outside of the piping is insulated with heat insulating material, running Costs can be lowered.

(d) By using a synthetic resin foam with low piping resistance, high cleanliness, and small surface roughness, such as polyurethane foam or polyethylene foam, as the material for approximately semicircular or square piping, running costs and initial costs can be reduced. The cost can be reduced at the same time.

(e) Since the temperature of the fluid in the tank is smoothly raised and lowered, it is possible to control the temperature of the tank to the desired temperature by leaving the fermenter alone and increasing the temperature, which is highly effective.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of one embodiment of the present invention;
Figure A is a partial cross-sectional view of piping with an approximately semicircular cross section as hot and cold water passages, and Figure B is a partial cross-sectional view of piping with a rectangular cross section bonded to the outer surface of the tank, with an FRP overlay and heat insulating material on the outermost surface. shows. 1...Reinforced plastic tank body, 2,
2'...Piping, 3...FRP overlay, 4...
...Heat insulation material layer or air layer, 5 ... Heat insulation material, 6 ... Water passage, 7 ... Content fluid, 8 ... Hot water, cold water inlet, 9 ... Hot water, cold water outlet.

Claims (1)

[Scope of utility model registration request] A urethane foam or polyethylene foam pipe with an approximately semicircular cross section or a square pipe is directly wound spirally around the tank surface and glued onto the surface of the reinforced plastic tank, and an FRP overlay is placed on top of it. The outer surface of the pipe is covered with adhesive and fixed to the outer surface of the reinforced plastic tank, and a plastic heat insulating material is applied to the outer surface to leave an air layer between the overlay and the reinforced plastic tank. covering the whole
A tank made of reinforced plastic and equipped with a heating and cooling device, characterized in that the hot water or cooling water used is recycled.