JP2022138749A - Scale suppression unit - Google Patents

Abstract

To provide a scale suppression unit capable of changing a dissolution rate of a phosphate ion according to a degree of scale deposition and capable of more surely suppressing scale deposition while allowing an installation of scale suppression means inexpensively and easily inside various kinds of systems.SOLUTION: A scale suppression unit 1 includes: a P-containing alloy 2, and a P-containing alloy housing part 3 configured to house the P-containing alloy 2 and to allow hot spring water or heated hot water to circulate inside and outside thereof. Thus, a dissolution rate of a phosphate ion can be changed according to a degree of scale deposition by adjusting a surface area of the P-containing alloy 2 so that a scale deposition can be more surely suppressed, and the scale suppression unit can be installed inexpensively and easily inside various kinds of systems.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a scale control unit suitable for use mainly in a geothermal power generation system, a hot spring supply system, a hot water supply system, or the like.

Conventionally, in a geothermal power generation system using hot springs from a source, scale S (calcium carbonate or calcium chloride) adheres inside the hot water storage tank 15 (see FIG. 8) or inside the pipe 100 (see FIG. 22), where temperature changes are particularly rapid. As a result, there is a concern that supply failure due to clogging or the like will occur. Especially in Europe and North America, where hard water with a high mineral content is present, scale adhesion is more pronounced.

In addition, even in the hot spring supply system that supplies the hot spring from the source after heating, cooling, and diluting it to the bathtub, the parts where the hot spring circulates, especially the hot spring adjustment tank 41 (see FIG. 20) where the temperature changes rapidly, and the adjusted hot spring Since scale adheres to the water supply pipe 33 (see FIG. 19) and causes supply failure due to clogging, it is necessary to perform scale removal work (maintenance) about once or twice a week, which is a significant burden on the hot spring provider. It is an economic or labor burden.

Furthermore, in hot water supply systems in homes and the like, accumulation of calcium carbonate is a concern, particularly in hot water supply system 50 (see FIG. 21) that uses late-night power.

As a method of solving these problems, for example, a method of forming a P-containing plating film that suppresses the adhesion of scale to a portion where hot springs or hot water flows has been proposed (Japanese Patent Application Laid-Open No. 2017-52984). .

However, in the method of forming the P-containing plating film, the dissolution rate of phosphate ions is uniquely determined by the surface area of the part where the P-containing plating film is formed and the inner and outer diameters of the piping, so the degree of scale adhesion In some cases, the adhesion of scale could not be sufficiently suppressed. Also, in order to suppress scale, it is desirable to apply a P-containing plating film to all parts where hot springs and hot water flow, but it has not been adopted because the economic burden associated with construction is extremely large.

JP 2017-52984 A

Accordingly, an object of the present invention is to be able to change the rate of dissolution of phosphate ions according to the degree of scale adhesion, to more reliably suppress scale adhesion, and to provide inexpensive and easy scale suppression means in various systems. To provide a scale suppression unit capable of constructing

What solves the above problems is to have a P-containing alloy made of a brazing material and a P-containing alloy storage part that stores the P-containing alloy and allows hot springs or hot water to flow inside and outside. (Claim 1). The P-containing alloy is preferably made of brazing material (claim 2). The P-containing alloy is preferably formed by bending or curving a foil-like body (Claim 3). It is preferable that the P-containing alloy containing portion is composed of a tubular mesh (claim 4).

Moreover, what solves the above problems is a scale suppression unit characterized by having a P-containing alloy made of a brazing material and an outer cylindrical portion that houses the P-containing alloy (claim 5). It is preferable that the P-containing alloy is made of a brazing material (claim 6). The alloy is preferably arranged in the gap between the inner cylindrical portion and the outer cylindrical portion (Claim 7). The P-containing alloy is preferably formed by bending or curving a foil-like body (claim 8). It is preferable that the inner cylindrical portion is made of a mesh body (Claim 9). The P-containing alloy disposed in the outer cylindrical portion may be an elongated body (a rod-like body or a band-like body) disposed along the axial direction of the outer cylindrical portion (Claim 10).

According to the scale suppression unit described in claim 1, when arranged in a hot water tank of a geothermal power generation system, etc., the surface area of the P-containing alloy formed by the brazing material (for example, the wetted area and amount of the P-containing alloy) ) can be adjusted to change the rate of dissolution of phosphate ions according to the degree of scale adhesion, thereby more reliably suppressing scale adhesion and enabling easy and inexpensive installation in various systems.
According to the scale suppression unit described in claim 2, the scale suppression unit having the effect of the scale suppression unit described in claim 1 can be manufactured at extremely low cost.
According to the scale suppression unit described in claim 3, for example, the contact area between the P-containing alloy and the hot spring or hot water is increased by adjusting the amount and type of the foil-shaped body, the degree of bending or bending, etc. By changing the dissolution rate of phosphate ions according to the degree of scale adhesion, scale adhesion can be more reliably suppressed.
According to the scale suppression unit recited in claim 4, the scale suppression unit having the effects recited in claim 1 or 2 can be configured with a simpler structure.
According to the scale suppression unit described in claim 5, when used as a pipe for a geothermal power generation system or the like, the surface area of the P-containing alloy formed by the brazing material is adjusted, and phosphoric acid is added according to the degree of scale adhesion. The dissolution rate of ions can be changed, the adhesion of scale can be suppressed more reliably, and it can be installed easily and inexpensively in various systems.
According to the scale suppression unit recited in claim 6, a scale suppression unit exhibiting the effects of the scale suppression unit recited in claim 5 can be manufactured at extremely low cost.
According to the scale suppression unit recited in claim 7, the scale suppression unit having the effect recited in claim 4 can be configured with a simpler structure.
According to the scale suppression unit described in claim 8, for example, the contact area between the P-containing alloy and the hot spring or hot water is increased by adjusting the amount and type of the foil-shaped body, the degree of bending or bending, etc. By changing the dissolution rate of phosphate ions according to the degree of scale adhesion, scale adhesion can be more reliably suppressed.
According to the scale suppression unit recited in claim 9, the scale suppression unit having the effect recited in any one of claims 4 to 6 can be configured with a simpler structure.
According to the scale suppression unit described in claim 10, the contact area between the P-containing alloy and the hot spring or hot water is increased by adjusting the form of the P-containing alloy (for example, the wetted area and number of elongated bodies). By changing the dissolution rate of phosphate ions according to the degree of scale adhesion, scale adhesion can be suppressed more reliably.

1 is a schematic vertical cross-sectional view of an embodiment of a scale suppression unit of the present invention; FIG. FIG. 2 is a partial cross-sectional view taken along line AA of FIG. 1; FIG. 2 is an exploded view of the P-containing alloy of the scale suppression unit shown in FIG. 1; 2 is a schematic front view of a P-containing alloy storage portion of the scale suppression unit shown in FIG. 1; FIG. FIG. 5 is a plan view of FIG. 4; 2 is a front view of a lid body of the scale suppression unit shown in FIG. 1; FIG. FIG. 7 is a plan view of FIG. 6; 1 is an explanatory diagram of a geothermal power generation system using a scale suppression unit of the present invention; FIG. FIG. 4 is a front view of another embodiment of the scale suppression unit of the present invention; FIG. 10 is a longitudinal sectional view of the scale suppression unit shown in FIG. 9; FIG. 10 is a cross-sectional view taken along line BB of FIG. 9; FIG. 10 is a cross-sectional view taken along line CC of FIG. 9; FIG. 10 is a front view of the P-containing alloy of the scale suppression unit shown in FIG. 9; FIG. 10 is an exploded view of the P-containing alloy of the scale control unit shown in FIG. 9; FIG. 4 is a front view of another embodiment of the scale suppression unit of the present invention; FIG. 16 is a longitudinal sectional view of the scale suppression unit shown in FIG. 15; 16 is an enlarged cross-sectional view taken along line DD of FIG. 15; FIG. 16 is an enlarged front view of the P-containing alloy of the scale suppression unit shown in FIG. 15; FIG. 1 is an explanatory diagram of a hot spring supply system using a scale suppression unit of the present invention; FIG. FIG. 4 is an explanatory diagram of another hot spring supply system using the scale suppression unit of the present invention; 1 is an explanatory diagram of a hot water supply system using a scale suppression unit of the present invention; FIG. FIG. 4 is an enlarged cross-sectional view for explaining a state in which scale adheres to the inside of a pipe in a conventional geothermal power generation system; 1. It is a photograph in the temperature control tank when the scale suppression unit shown in FIG. 1 is arrange|positioned in the tank for temperature control of a hot spring supply system. 1. It is a photograph in the temperature control tank before arrange|positioning the scale suppression unit shown in FIG. 1 in the temperature control tank of a hot spring supply system.

In the present invention, the P-containing alloy 2 formed of a brazing material and the P-containing alloy 2 are housed and used in various tanks such as a geothermal power generation system, a hot spring supply system, or a hot water supply system. Alternatively, by having the P-containing alloy storage part 3 in which hot water can flow inside and outside, the dissolution rate of phosphate ions can be changed according to the degree of scale adhesion, or the wetted area of the P-containing alloy 2 can be adjusted. Thus, a scale suppression unit 1 that can more reliably suppress scale adhesion and can be installed in various systems at low cost and easily has been realized.

In addition, in the present invention, the P-containing alloy 72 formed of brazing material and the P-containing alloy 72 are stored as those used as various pipes or parts of pipes such as geothermal power generation systems, hot spring supply systems, hot water supply systems, etc. By having the outer cylindrical portion 71, the dissolution rate of phosphate ions can be changed according to the degree of scale adhesion, and the wetted area of the P-containing alloy 2 can be adjusted to more reliably adhere scale. In addition, the scale control unit 70 that can be inexpensively and easily installed in various systems has been realized.

A scale suppression unit of the present invention will be described using one embodiment shown in FIGS. 1 to 7. FIG.
The scale suppression unit 1 of this embodiment has a P-containing alloy 2 made of a brazing material, and a P-containing alloy storage section 3 that stores the P-containing alloy 2 and allows hot springs or hot water to flow inside and outside. ing. Each configuration will be described in detail below.

The scale suppression unit 1 of this embodiment is for suppressing the adhesion of scale to a geothermal power generation system, a hot spring supply system, a hot water supply system, or the like, and is used by arranging it in these various tanks.

Specifically, the P-containing alloy 2 formed of brazing material is arranged to suppress scale adhesion in a geothermal power generation system, a hot spring supply system, a hot water supply system, etc., and contains P (phosphorus). A wide range of brazing materials may be included, and in addition to P (phosphorus), for example, Ni, W, Fe, Co, Cr, Cu, Ag (to which sterilization is added), etc. may be contained. It is not preferable to contain Pb or the like, which may adversely affect the In the present application, "brazing material" refers to an alloy used for brazing, and is used as a kind of adhesive by melting an alloy (brazing material) having a lower melting point than the member (base material) to be joined.

Thus, the reason why the P-containing alloy 2 formed of the brazing material is arranged in a geothermal power generation system, a hot spring supply system, a hot water supply system, etc. is that the main components of the scale are calcium carbonate and calcium chloride, and this carbonic acid This is based on the knowledge that the adhesion amount of calcium and calcium chloride is about 1/3 to 1/4 of that of polyvinyl chloride, carbon steel or stainless steel (SUS) in P-containing alloys.

As the P-containing alloy 2 formed by the brazing material of this embodiment, a foil brazing material containing 10% by weight of P, 43% by weight of Ni, 27% by weight of Fe, and 20% by weight of Cr is used. there is In this embodiment, by using a brazing filler metal as the P-containing alloy 2, adhesion of scale in various systems can be suppressed at a very low cost. Specifically, the brazing material is about 1/10 cheaper than the P--Wi alloy. In addition, in this embodiment, the surface area of the P-containing alloy 2 formed by the brazing material is appropriately adjusted instead of forming the P-containing plating film that suppresses the adhesion of scale on the portion where the hot spring or hot water flows. By changing the dissolution rate of phosphate ions or adjusting the wetted area of the P-containing alloy 2 according to the degree of scale adhesion, scale adhesion can be suppressed more reliably. Furthermore, in this embodiment, complicated plating is not performed, and the construction is extremely easy by simply attaching the scale suppression unit 1 to various tanks.

More specifically, the P-containing alloy 2 formed from the brazing material of this embodiment bends the foil-like body of FIG. 7) are radially fixedly arranged around the mounting rod 5 extending downward. Reference numeral 6 denotes a gripping portion that is gripped when the scale suppression unit 1 is mounted in various tanks. In this embodiment, as shown in FIG. 1, eight P-containing alloys 2 formed of brazing filler metal are fixed along the longitudinal direction of the mounting rod 5 (the number of which can be changed in design as appropriate). ing. In addition, the P-containing alloy 2 of this embodiment is bent at a plurality of locations in order to increase the contact area with the hot spring or hot water. The scope of the present invention also includes those in which the contact area with hot water is increased to enhance the scale suppression efficiency.

The P-containing alloy storage part 3 stores the P-containing alloy 2 and allows the hot spring or hot water to flow inside and outside. In this embodiment, as shown in FIG. It is However, the P-containing alloy storage part 3 is not limited to a cylindrical mesh body, and may be of any type as long as it stores the P-containing alloy 2 and allows hot springs or hot water to circulate inside and outside. , for example, a tubular body having a large number of holes. In addition, the scale suppression unit 1 of this embodiment is arranged in various tanks and used, and is bent in the P-containing alloy storage part 3 that allows hot springs or hot water to flow inside and outside. Although it is a foil-shaped body, it is not limited to this, and a plurality of elongated bodies (band-shaped bodies, rod-shaped bodies) are arranged in the P-containing alloy storage part 3, or a bottomed net The scope of the present invention also includes a P-containing alloy container (container) containing a large number of P-containing alloy granules.

Next, how to use the scale suppression unit 1 will be sequentially explained using examples of use in various systems.
FIG. 8 is an explanatory diagram of a geothermal power generation system 10 using the scale suppression unit 1. FIG.
The geothermal power generation system 10 includes a high temperature heat source side 11 that supplies a high temperature heat source to a binary power generation 13 side, a binary generator 13 , and a low temperature heat source side 12 that supplies a low temperature heat source to the binary generator 13 . This binary power generator 13 utilizes two heat cycles, a high temperature heat source side 11 and a low temperature heat source side 12 using a low temperature medium system, to rotate a turbine with steam to generate power.

The high-temperature heat source side 11 includes a source pipe 16 that communicates the source 14 and a hot water storage tank 15, a high-temperature heat source supply pipe 18 that communicates the hot water storage tank 15, the hot water storage tank 15, and a heat exchanger 17, and a heat exchanger. 17 and a drain pipe 19 . 20 is a pump, 21 is an evaporator, 22 is a turbine, 23 is a condenser, and 24 is a cooler.

In the geothermal power generation system 10, the scale suppression unit 1 is arranged in the hot water storage tank 15, so that the P-containing alloy 2 formed of brazing material has an extremely large contact area with the hot spring in the hot water storage tank 15. The adhesion of scale in the hot water storage tank 15 is suppressed by the contact between the hot spring and the hot spring.

FIG. 20 is an explanatory diagram of a hot spring supply system 40 using the scale suppression unit 1. As shown in FIG.
The hot spring supply system 40 includes a hot spring adjusting tank 41 for adjusting the temperature or composition, an adjusted hot spring pipe 43 communicating between the hot spring adjusting tank 41 and the bathtub 42, a source 44 and the hot spring adjusting tank 41. It has a connecting source pipe 45 . In this embodiment, since the hot spring from the source 44 is heated, the hot spring adjusting tank 41 is a heating tank, and the hot water from the boiler 47 is supplied to the heat transfer plate 46 arranged inside. The hot spring in the hot spring adjusting tank 41 is heated by refluxing.

In this hot spring supply system 40, by disposing the scale suppression unit 1 in the hot spring adjusting tank 41, the contact area with the hot spring in the hot spring adjusting tank 41 is extremely large. The P-containing alloy 2 and the hot spring come into contact with each other, thereby suppressing the adhesion of scale in the hot spring adjustment tank 41 .

FIG. 21 is an explanatory diagram of a hot water supply system 50 using the scale suppression unit 1. As shown in FIG.
The hot water supply system 50 has a heat pump portion 51 and a hot water storage tank portion 52, and is a hot water supply system that uses carbon dioxide as a refrigerant. Specifically, the hot water supply system 50 takes outside air 53 into the heat pump section 51, heats carbon dioxide in the air heat exchanger 54, sends it to the compressor 55, and compresses it to a high temperature. The hot carbon dioxide is introduced into the heat exchanger 56 to warm the water supplied to the hot water storage tank portion 52 . This is a system that heats the water supplied from the water supply 57 and supplies the hot water 58 .

In this hot water supply system 50, by disposing the scale suppression unit 1 in the hot water storage tank portion 52, the P-containing scale formed by the brazing material having an extremely large contact area with the hot water in the hot water storage tank portion 52 is provided. It is configured such that adhesion of scale in the hot water storage tank portion 52 is suppressed by the alloy 2 coming into contact with the hot water.

Further, another embodiment of the scale suppression unit 70 of the present invention shown in FIGS. 9-14 will be described.
The scale suppression unit 70 of this embodiment includes a P-containing alloy 72 made of a brazing material, an outer cylindrical portion 71 containing the P-containing alloy 72, and an inner cylindrical portion 73 through which hot springs or hot water can flow inside and outside. , and the P-containing alloy 72 is arranged in the gap between the inner cylinder portion 73 and the outer cylinder portion 71 . Each configuration will be described in detail below.

The scale suppression unit 70 of this embodiment is for suppressing scale deposition in a geothermal power generation system, a hot spring supply system, a hot water supply system, or the like, and is used as part of the piping or as a substitute for the piping. .

The P-containing alloy 72 formed of brazing material is arranged to suppress scale adhesion in a geothermal power generation system, a hot spring supply system, a hot water supply system, etc., and includes a wide range of brazing materials containing P (phosphorus). However, in addition to P (phosphorus), for example, it may contain Ni, W, Fe, Co, Cu, Cr, Ag (to which bactericidal properties are added), etc., but it has an adverse effect on the human body. Those containing possible Pb and the like are not preferred.

Specifically, the P-containing alloy 72 formed from the brazing material of this example is a foil brazing material containing 10% by weight of P, 43% by weight of Ni, 27% by weight of Fe, and 20% by weight of Cr. is used. By using a brazing filler metal as the P-containing alloy 72, adhesion of scales in various systems can be suppressed at a very low cost. In addition, in the present invention, the surface area of the P-containing alloy 2 formed by the brazing material is appropriately adjusted instead of forming the P-containing plating film that suppresses the adhesion of scale on the portion where the hot spring or hot water flows. By changing the dissolution rate of phosphate ions or adjusting the wetted area of the P-containing alloy 2 according to the degree of scale adhesion, the scale adhesion can be suppressed more reliably. Furthermore, since complicated plating is not carried out, the construction becomes easier.

The P-containing alloy 72 formed by the brazing material of this embodiment is a foil-shaped body (pleated foil-shaped body) obtained by bending the foil-shaped body shown in FIG. 14 multiple times as shown in FIG. ). This P-containing alloy 72 is arranged along the circumference in the gap between the inner cylindrical portion 73 and the outer cylindrical portion 71 through which the hot spring can flow. More specifically, the pleated P-containing alloy 72 arranged along the circumference is a large number (specifically 10 pieces) along the axial direction of the outer cylindrical portion 71, but the number is the liquid contact area. The design can be changed as appropriate for adjustment.) They are arranged adjacent to each other. Although the P-containing alloy 72 is bent at a plurality of locations as shown in FIG. 12 or FIG. Those with improved efficiency are also included in the scope of the present invention.

The outer cylinder part 71 is a pipe for circulating hot springs or hot water. It is connected to piping via a pipe joint 90 arranged on the side or downstream side. Although the scale suppression unit 70 of this embodiment is used as part of the piping of a geothermal power generation system, a hot spring supply system, a hot water supply system, or the like, the scale suppression unit of the present invention includes a geothermal Also included are those used as a whole for the plumbing of power generation systems, hot spring supply systems, hot water supply systems, and the like.

In addition, although the outer cylindrical portion 71 of this embodiment is a metal pipe made of a steel pipe, it is not limited to this, and any pipe can be used as long as the hot spring can be circulated inside. For example, a pipe made of polymer resin may be used.

The inner cylindrical portion 73 allows the hot spring to flow inside and outside (inside the inner cylindrical portion 73 and the gap between the outer cylindrical portion 71 and the inner cylindrical portion 73). As shown, it is composed of a tubular mesh. However, the inner tubular portion 73 is not limited to a tubular mesh body, and may be of any type as long as it allows the hot spring to flow inside and outside. There may be. In addition, the scale suppression unit 70 of this embodiment has a foil-like body disposed in the gap between the outer cylinder portion 71 and the inner cylinder portion 73, but is not limited to this. The scope of the present invention also includes a case in which a large number of P-containing alloy particles, etc., are accommodated in the gaps between the inner cylindrical portion 73 and the inner cylindrical portion 73 .

Next, how to use the scale suppression unit 70 will be sequentially explained using examples of use in various systems.
FIG. 8 is an explanatory diagram of the geothermal power generation system 10 using the scale suppression unit 70. As shown in FIG.
The geothermal power generation system 10 includes a high temperature heat source side 11 that supplies a high temperature heat source to a binary power generation 13 side, a binary generator 13 , and a low temperature heat source side 12 that supplies a low temperature heat source to the binary generator 13 .
The high-temperature heat source side 11 includes a source pipe 16 that communicates the source 14 and a hot water storage tank 15, a high-temperature heat source supply pipe 18 that communicates the hot water storage tank 15, the hot water storage tank 15, and a heat exchanger 17, and a heat exchanger. 17 and a drain pipe 19 . 20 is a pump, 21 is an evaporator, 22 is a turbine, 23 is a condenser, and 24 is a cooler. In the geothermal power generation system 10, the scale suppression unit 70 is arranged in each of the source pipe 16 and the high-temperature heat source supply pipe 18, so that the contact area with the hot spring is extremely large. The contact between the contained alloy 72 and the hot spring suppresses the adhesion of scale in the source pipe 16 or the high-temperature heat source supply pipe 18 .

FIG. 19 is an explanatory diagram of the hot spring supply system 30 using the scale suppression unit 70. As shown in FIG.
This hot spring supply system 30 includes a hot spring adjusting tank 31 for adjusting the temperature or composition, an adjusted hot spring pipe 33 communicating between the hot spring adjusting tank 31 and the bathtub 32, a source 34 and the hot spring adjusting tank 31. , a hot spring supply pipe 36 arranged in the hot spring adjustment tank 31, into which the adjusted hot spring flows from the upper end and communicating with the adjusted hot spring pipe 33, and the adjusted hot spring pipe 33 and the hot spring adjusting tank 31 are connected to each other. In this embodiment, since the hot spring from the source 5 is heated, the hot spring adjustment tank 31 is a heating tank, and the hot water from the boiler 38 is supplied to the heat transfer plate 39 arranged inside. The hot spring in the hot spring adjusting tank 31 is heated by refluxing.

In the hot spring supply system 30, the scale suppression unit 70 is arranged in each of the adjusted hot spring pipe 33, the hot spring pipe 35, the hot spring supply pipe 36, and the return pipe 37, thereby reducing the contact area with the hot spring. Due to the contact between the P-containing alloy 72 formed by the brazing material and the hot spring, the adhesion of scales in the adjusted hot spring pipe 33, the source pipe 35, the hot spring supply pipe 36, and the return pipe 37 is prevented. configured to be suppressed. When the hot spring supply system 30 is newly installed, it is used as the above pipe, and in the existing hot spring supply system 30, it is used by replacing the above pipe. As a result, scale control within the hot spring supply system 30 can be performed more easily and at a lower cost.

Further, another embodiment of the scale suppression unit of the present invention shown in FIGS. 15 to 18 will be described.
The scale suppression unit 80 of this embodiment is also a scale suppression unit used as a pipe or part of a pipe in a geothermal power generation system, a hot spring supply system, or a hot water supply system. , and the P-containing alloy 81 is a plurality of elongated bodies arranged along the axial direction of the outer cylindrical portion 71 .

The basic differences between the scale suppression unit 80 of this embodiment and the scale suppression unit 70 described above are the composition of the P-containing alloy 81 formed of the brazing material and the P-containing The alloy 81 is an elongated body arranged along the axial direction of the outer cylindrical portion 71, and the scale suppression unit 80 does not have an inner cylindrical portion. Each configuration will be described in detail below, but the same components as those of the scale suppression unit 70 are denoted by the same reference numerals, and description thereof will be omitted.

The P-containing alloy 81 formed of brazing material is for suppressing scale adhesion in a geothermal power generation system, a hot spring supply system, or the like, and includes a wide range of brazing materials containing P (phosphorus). ), it may contain, for example, Ni, W, Fe, Co, Cu, Cr, Ag (to which bactericidal properties are added), etc., but Pb may have an adverse effect on the human body. etc. is not preferred. In this example, a brazing material of 5 wt % P, 4 wt % Ni, 15 wt % Sn and 76 wt % Cu is used.

The P-containing alloy 81 formed of the brazing material arranged in the outer cylinder portion 71 is a long body (see FIG. 16 or 18) arranged along the axial direction of the outer cylinder portion 71, and this implementation Thirty-two P-containing alloys 81 formed of the brazing material of the example are arranged at equal intervals or at equal angles along the circumference in the outer cylindrical portion 71 through which hot springs and hot water can flow. In this embodiment, the P-containing alloy 81 formed of the brazing material arranged along the axial direction of the outer cylindrical portion 71 is a rod-shaped body, but is not limited to this, and may be a long body. It may be in any form, for example, a belt-like body is also included in the scope of the present invention. In addition, the number and thickness of the P-containing alloy 81 formed of the brazing material are not limited to this, and are appropriately designed to increase the scale suppression efficiency by increasing the contact area with the hot spring or hot water. Can be changed. Further, as shown in FIG. 16 or FIG. 17, bent portions 81a and 81b provided at the upper and lower ends of a P-containing alloy 81 formed of brazing material are engaged with annular locking bodies 82 and 83, respectively. An elongated body is arranged inside the outer cylindrical portion 71 .

In addition, the scale suppression unit 80 is not provided with an inner cylindrical portion, and the hot spring or hot water flowing from the upper end opening 91 of the pipe joint 90 provided on the upstream side flows into the scale suppression unit 80, and flows into the scale suppression unit 80 on the downstream side. The P-containing alloy 81 formed of the brazing material in the outer cylindrical portion 71 is contacted with the P-containing alloy 81 to suppress the generation of scale until it flows into the pipe joint 90 provided in the outer cylinder portion 71 .

(Verification test)
In a hot spring supply facility in Shirahone Onsen, Matsumoto City, Nagano Prefecture, a scale suppression unit 70 of the present invention was erected as a hot spring supply pipe in a hot spring adjustment tank.

(Test results)
FIG. 23 is a photograph of the inside of the hot spring adjustment tank (heating tank) when the scale suppression unit 70 of the present invention is installed as a hot spring supply pipe. rice field.
On the other hand, Fig. 24 is a photograph of the inside of the hot spring adjustment tank (heating tank) when the existing supply pipe (heat-resistant rigid polyvinyl chloride pipe) is installed. of scale was observed.
From these comparisons, it is clear that even if the scale suppression unit 70 of the present invention is installed as a hot spring supply pipe, the adhesion of scale to the inner wall surface of the hot spring adjustment tank (heating tank) and the heat transfer plate is suppressed. As a result, it is presumed that the decrease in the heat exchange efficiency of the hot spring adjustment tank can also be suppressed.

1 Scale suppression unit 2 P-containing alloy 3 P-containing alloy storage part 4 Lid 5 Mounting rod 6 Grip part 70 Scale suppression unit 71 Outer cylinder part 72 P-containing alloy (bent foil-shaped body)
73 Inner cylindrical portion 80 Scale suppression unit 81 P-containing alloy (long body)
82 Annular locking body 83 Annular locking body 90 Pipe joint

Claims (10)

1. A scale suppression unit comprising: a P-containing alloy made of a brazing material; and a P-containing alloy storage section for storing the P-containing alloy and allowing a hot spring or hot water to flow inside and outside. 2. The scale suppression unit according to claim 1, wherein said P-containing alloy is made of brazing material. The scale suppression unit according to claim 1 or 2, wherein the P-containing alloy is formed by bending or curving a foil-like body. The scale suppression unit according to any one of claims 1 to 3, wherein the P-containing alloy containing portion is configured by a tubular mesh body. A scale suppression unit, comprising: a P-containing alloy; and an outer cylindrical portion for housing the P-containing alloy. 6. The scale suppression unit according to claim 5, wherein the P-containing alloy is made of brazing material. The scale suppression unit has an inner cylindrical portion through which hot spring water or hot water can flow inside and outside, and the P-containing alloy is arranged in a gap between the inner cylindrical portion and the outer cylindrical portion. The scale suppression unit according to 5 or 6. The scale suppression unit according to any one of claims 5 to 7, wherein the P-containing alloy is formed by bending or curving a foil-like body. The scale suppression unit according to any one of claims 6 to 8, wherein the inner cylindrical portion is configured by a mesh body. The scale suppression unit according to claim 5 or 6, wherein the P-containing alloy arranged in the outer cylinder portion is an elongated body arranged along the axial direction of the outer cylinder portion.

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