JPH11211366A - Synthetic resin heat transfer element and plate type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To treat particularly large quantity of a sea water or chemicals by guiding a first heat exchanging medium to one of an inner surface side and an outer surface side of an element, guiding a second heat exchanging medium to the other, and heat exchanging the one medium with the other. SOLUTION: This plate type heat exchanger comprises many elements 2 arranged apart at an interval. In this embodiment, a sea water flows as a liquid 5 from below to above in each element 2. The each element 2 has a pair of plates 1 oppositely disposed near at hand, and its four peripheral sides, are blocked by a sealing member. As the plate 1, a wavy plate of a polyvinyl chloride can be used. A waveform polyvinyl chloride plate is connected between the pair of flat surface-like plates as the plate 1. Further, the element 1 may be formed in a honeycomb structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate heat exchanger element used for cooling seawater, chemicals, and the like.

[0002]

2. Description of the Related Art In general, a plate-type heat exchanger is manufactured using a corrosion-resistant metal plate having good heat conductivity.

[0003]

In the heat exchanger having corrosion resistance, a stainless steel plate or the like is used in particular. However, when exchanging a large amount of seawater or chemicals with heat, the metal plate is heavy and the production is heavy. There was a drawback that it was troublesome and expensive. Therefore, an object of the present invention is to provide a large-sized heat transfer element which can process a large amount of seawater and chemicals and is easy to manufacture, and a plate-type heat exchanger using the same.

[0004]

According to the heat transfer element made of synthetic resin of the present invention, a pair of plates made of synthetic resin having chemical resistance or corrosion resistance are arranged in parallel, and the outer peripheral edges of the pair of plates are arranged. The element 2 is configured by closing the space in a liquid-tight manner, and the first heat exchange medium is guided to one of the inner surface side and the outer surface side of the element 2 and the second heat exchange medium is guided to the other. The heat exchange medium is configured to perform heat exchange between the two heat exchange media. Since such a heat transfer element uses a plate made of a synthetic resin, the specific gravity is small, and particularly, it is easy to assemble a large plate heat exchanger. By securing a large heat transfer area, heat exchange can be sufficiently promoted.

A heat transfer element made of synthetic resin according to a second aspect is a preferred embodiment of the element according to the first aspect, in which a pair of plates 1 are formed to bend in a corrugated shape. The corrugated surface enlarges the heat transfer area and promotes heat exchange. Next, the invention according to claim 3 is a preferred embodiment according to claim 1, wherein the pair of plates 1 is formed in a flat plate shape, and a fin made of synthetic resin bent between the two plates 1 in a corrugated manner is provided. It is interposed and joined between them. Since the corrugated fins are interposed between the pair of plates 1 in this manner, the strength of the element can be kept strong, and the heat exchange medium can be agitated by the presence of the corrugated fins to improve the heat transfer performance.

A heat transfer element made of synthetic resin according to a fourth aspect is a preferred embodiment of the element according to any one of the first to third aspects, wherein a heat exchange element is provided at one end of the element 2. A medium inflow section 3 is provided, and a heat exchange medium outflow section 4 is provided at the other end. With this configuration, the heat exchange medium flows from one end to the other end of the element, and can uniformly flow throughout the element to promote heat exchange. According to a fifth aspect of the present invention, a plurality of the synthetic resin heat transfer elements according to any one of the first to fourth aspects are arranged, and the liquid 5 is guided into each element 2, and the liquid 5 is provided between the elements 2. The fluid 6 to be heat-exchanged is guided. By arranging a plurality of heat transfer elements made of synthetic resin in this manner, a larger plate-type heat exchanger can be provided.

According to a sixth aspect of the present invention, in the plate type heat exchanger according to the fifth aspect, hot wastewater of seawater used as cooling water for a condenser of a power plant is introduced into each element, and each element 2 Air is blown in between, heat exchange is performed between the two, and after the heat exchange, the cooled seawater is discharged into the sea, and the heated air is guided to the greenhouse for plant cultivation. It is composed. This heat exchanger can use a relatively large amount of hot wastewater (cooling seawater) discharged from the power plant at a relatively low temperature without any restriction, thereby heating the greenhouse to an appropriate temperature. Good. Moreover, since the heated air does not reach a high temperature, the plants near the outlet are not adversely affected. In addition, the heat exchange allows the warm wastewater of the seawater to be cooled by the atmosphere, and the cooled seawater can be returned to the sea.
That is, since low-temperature seawater is discharged into the sea, there is no effect on the ecosystem near the drain. Further, since a synthetic resin plate that is corrosion-resistant to seawater is used, the heat exchanger has a long life. Next, in a seventh aspect of the present invention, in the sixth aspect, the greenhouse for plant cultivation is formed of a greenhouse. According to the present invention, a simple greenhouse can be economically maintained.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory front view of a plate heat exchanger using the synthetic resin heat transfer element of the present invention, and FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 3 is an enlarged view of a portion III in FIG. FIG. 4 shows a heat exchanger of the present invention for a greenhouse using hot wastewater (seawater) used for cooling a condenser of a power plant. In the plate-type heat exchanger of FIGS. 1 to 3, a large number of elements 2 are arranged in parallel at intervals, and in each element, seawater flows as liquid 5 from below to above in this example, and a fan 9 is provided on the outer surface of each element. The fluid 6 as a cooling airflow by the air flows through the inlet duct 15. As shown in FIG. 3, each element 2 has a pair of plates 1 arranged close to each other and opposed to each other, and four circumferences thereof are closed by seal portions 11. As the plate 1, a corrugated vinyl chloride plate can be used. Alternatively, the element may be formed by using a corrugated vinyl chloride plate joined between a pair of flat plates. Further, the element may have a honeycomb structure.

The seal portion 11 shown in FIG. 3 can be formed by using a two-liquid type adhesive. An inlet branch pipe 7 is disposed at one end of each plate 1 in the wave traveling direction, and an outlet branch pipe 8 is disposed at the other end, and slit-like inflow portions 3 and outflow portions 4 provided in the axial direction of the pipes are provided. Open in the direction of wave travel. The plate 1 has a thickness as small as possible. As an example, 0.5 mm
の も の 1 mm can be used. By facing the long and wide plate 1, a large heat transfer area can be secured, and the seawater flowing through the element 2 can be efficiently cooled by the large fan 9.

Next, each of the inlet branch pipe 7 and the outlet branch pipe 8 is connected to the inlet header 1 at the end of each element.
0, they are assembled into an outlet header 12, and are connected to an inlet pipe 13 and an outlet pipe 14 via the headers 10, 12. The inlet pipe 13 is connected to a hot water outlet of a condenser (not shown) of a power plant or a pool connected thereto through a pump 17 as shown in FIG. The outlet pipe 14 is connected to the sea (not shown), and the cooled seawater is discharged there. Then, pressure is applied by the pump 17, and the warm drainage of the power plant as the liquid 5 flows upward from below. Note that the distribution direction may be reversed.

In the example shown in the drawings, the pair of plates 1 are arranged such that the pitch of each wave is shifted by a half pitch, but they may be arranged so that they are synchronized. The air heated by the heat exchange is supplied from an outlet duct 16 into a greenhouse (not shown). According to the experiment, the inside of the greenhouse was able to be kept constant at 15 degrees Celsius with the present heat exchanger using the hard vinyl chloride element using the hot waste water at 20 degrees Celsius. The outside air temperature at this time was in a range of 0 to 5 degrees Celsius.

[0012]

The synthetic resin heat transfer element and the plate type heat exchanger of the present invention are composed of a pair of synthetic resin plates 1 having chemical resistance or corrosion resistance, and are therefore easy to manufacture. It is possible to provide an inexpensive plate-type heat exchanger which is lightweight and excellent in chemical resistance and corrosion resistance. Particularly, it is most suitable for a heat exchanger such as a greenhouse using seawater used for cooling water for a condenser of a power plant.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a plate-type heat exchanger using a synthetic resin heat transfer element of the present invention.

FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view of a part III in FIG. 2;

FIG. 4 is a front view of a heat exchanger using hot waste water of a power plant using the element of the present invention.

FIG. 5 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate 2 Element 3 Inflow part 4 Outflow part 5 Liquid 6 Fluid 7 Inlet branch pipe 8 Outlet branch pipe 9 Fan 10 Inlet header 11 Seal part 12 Outlet header 13 Inlet pipe 14 Outlet pipe 15 Inlet duct 16 Outlet duct 17 Pump

Claims (7)

[Claims] A pair of plates made of synthetic resin having chemical resistance or corrosion resistance are arranged side by side, and the outer periphery of the pair of plates is liquid-tightly closed to form an element. The first heat exchange medium is guided to one of the inner surface side and the outer surface side of the element 2, and the second heat exchange medium is guided to the other, so that heat exchange is performed between the two heat exchange media. Heat transfer element made of synthetic resin. 2. The synthetic resin heat transfer element according to claim 1, wherein each of said pair of plates 1 is bent in a wave shape. 3. The combination according to claim 1, wherein said pair of plates are formed in a flat plate shape, and fins made of synthetic resin which are bent in a wave shape are interposed between said two plates, and are joined therebetween. Heat transfer element made of resin. 4. The element 2 according to claim 1, wherein one end of the element 2 is provided with an inflow portion 3 of the heat exchange medium, and the other end is provided with an outflow portion 4 of the heat exchange medium. The heat transfer element made of synthetic resin according to 1. 5. The synthetic resin heat transfer element according to claim 1, wherein a plurality of heat transfer elements are arranged, a liquid is introduced into each element, and the liquid is transferred between the elements.
A plate-type heat exchanger configured to guide a fluid 6 to be heat-exchanged. 6. The plate-type heat exchanger according to claim 5, wherein hot wastewater of seawater used as cooling water for the condenser of the power plant is introduced into each element, and air is blown between the elements. A heat exchange is performed between the two, and after the heat exchange, the cooled seawater is discharged into the sea, and the heated air is guided to a greenhouse for plant cultivation. Exchanger. 7. The plate heat exchanger according to claim 6, wherein the greenhouse for plant cultivation is made of a greenhouse.