Water-cooled jacket

Abstract

To provide a water-cooling jacket which can improve durability while maintaining cooling properties and heat shielding properties.SOLUTION: Disclosed is a water-cooling jacket 10 which is installed at the outer face of a high temperature facility. The jacket comprises: an inner wall 11 arranged at the outer face of the high temperature facility; an outer wall 12 provided in a state of being separated from the inner wall 11 so as to form a liquid storage space 10h in a space with the inner wall; a liquid feed part 20 for feeding a liquid to the liquid storage space 10h; and an exhaust part 25 for exhausting vapor after the evaporation of the liquid from the liquid storage space 10h. The inner wall 11 includes: a base wall 11a; and a protective layer 11b provided at the outer face of the base wall 11a and formed of a material having a thermal conductivity lower than the material of the base wall 11a. The inner face of the base wall 11a is provided with plural heat transfer fins 15 elongating along the vertical direction of the base wall 11a, and the lower part of the liquid storage space 10h is separated into plural spaces 15h with the plural heat transfer fins 15.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water-cooled jacket. More specifically, the present invention relates to a water-cooled jacket provided for cooling and heat shielding furnace and flue walls in non-ferrous metal smelting processes such as copper smelting. [Background Art]

[0002] In non-ferrous metal smelting processes such as copper smelting, high-temperature melts are handled in furnaces such as flash smelting furnaces and converters. In addition, high-temperature exhaust gas discharged from flash smelting furnaces, converters and the like flows inside flues provided in such facilities. In order to prevent damage to flash smelting furnaces, converters, flues, etc. (hereinafter simply referred to as flash smelting furnaces, etc.) caused by the heat of such high-temperature melts and exhaust gas, and to protect surrounding equipment from high temperatures, heat shielding walls formed of bricks or monolithic refractories are generally installed on the wall surfaces of flash smelting furnaces, etc. While such a heat shielding wall is excellent in heat insulation capacity and heat resistance, it requires time and skill for construction. Specifically, bricks and monolithic refractories are generally processed and assembled on site, and it is necessary to erect scaffolding for construction workers and maintain a comfortable and safe working environment during construction. However, when installing a heat shielding wall at a high place in a flash smelting furnace or the like, it becomes difficult to prepare the scaffolding and working environment.

[0003] In addition to heat shielding walls formed of bricks or monolithic refractories, water-cooled jackets are used as wall structures for cooling the wall surfaces of flash smelting furnaces and the like, and for shielding (heat insulating) the outside from heat of such facilities (see, for example, Patent Documents 1 to 3). A water-cooled jacket is generally a steel or copper structure having a cavity inside. By introducing cooling water into the cavity, the water-cooled jacket itself can be cooled, and the heat released from the equipment provided with the water-cooled jacket can be blocked for heat insulation, thereby protecting the surrounding area of the equipment from high temperatures. Moreover, compared with bricks and monolithic refractories, a single water-cooled jacket can cover a large-area wall surface, and the water-cooled jacket can be installed from a position distant from the flash smelting furnace or the like using a crane or the like, so the burden of erecting scaffolding and maintaining the working environment during construction is small, and installation can be completed in a short time. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Public Gazette No. 57-002880 [Patent Document 2] Patent No. 3397827 [Patent Document 3] Special Publication No. 57-014403 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, while water-cooled jackets typically use general industrial water as their cooling water, this water contains calcium and magnesium. Therefore, prolonged use of a water-cooled jacket can lead to the accumulation of sludge primarily composed of calcium and magnesium. This sludge tends to accumulate in the lower part of the jacket's interior, and its accumulation prevents sufficient cooling water from reaching the area below where the sludge is formed, resulting in insufficient cooling. This insufficient cooling causes the jacket to overheat, leading to distortion and various problems. For example, when multiple water-cooled jackets are connected, distortion can create gaps at the connections between them. These gaps reduce the insulation between the furnace and the outside air, decreasing the heat shielding effect. Furthermore, if the distortion of the water-cooled jacket exceeds a certain level, it may rupture, creating holes and causing cooling water leaks. Once such a cooling water leak occurs, it can potentially cause problems such as corrosion of the surrounding cooling jackets or the self-melting furnaces that house them.

[0006] In view of the above circumstances, the present invention aims to provide a water-cooled jacket that can improve durability while maintaining cooling performance and heat shielding performance. [Means for solving the problem]

[0007] The water-cooled jacket of the first invention is a water-cooled jacket installed on the outer surface of a high-temperature equipment, comprising: an inner wall disposed on the outer surface of the high-temperature equipment; an outer wall spaced apart from the inner wall so as to form a liquid-containing space between the outer wall and the outer wall; a liquid supply section for supplying liquid to the liquid-containing space; and an exhaust section for discharging vapor from the liquid-containing space. The inner wall comprises a base wall and a protective layer provided on the outer surface of the base wall, formed of a material with lower thermal conductivity than the base wall material. A plurality of heat transfer fins are provided on the inner surface of the base wall, extending along the vertical direction of the base wall, and the liquid-containing space is characterized in that the liquid-containing space is divided into a plurality of spaces by the plurality of heat transfer fins. The water-cooling jacket of the second invention is characterized in that, in the first invention, the material of the protective layer is a nickel-chromium alloy. The water-cooled jacket of the third invention is characterized in that, in the first or second invention, the liquid supply unit comprises a storage unit in which liquid to be supplied to the liquid-containing space is stored, and a supply pipe for supplying the liquid in the storage unit to the liquid-containing space, wherein the supply pipe is connected to a position below the midpoint in the vertical direction of the plurality of heat transfer fins. The water-cooled jacket of the fourth invention is characterized in that, in the third invention, the storage portion is positioned at a location where the hydrostatic pressure is such that it can supply to the liquid storage space an amount of liquid that can maintain a predetermined liquid level in the liquid storage space. The fifth water-cooled jacket of the first invention is characterized in that the liquid supply unit has the function of supplying water at 50°C to 100°C to the liquid containment space. [Effects of the Invention]

[0008] According to the first invention, since the inner wall has a protective layer formed on the outer surface of the base wall from a material with lower thermal conductivity than the base wall, it is possible to suppress the heat supplied from high-temperature equipment to the inner wall and water-cooling jacket. On the other hand, since multiple heat transfer fins are provided on the inner surface of the base wall, even with the protective layer in place, the heat from the high-temperature equipment transmitted to the inner wall can be transferred to the liquid with a certain degree of efficiency. Therefore, it is possible to dissipate heat from high-temperature equipment while preventing damage to the inner wall and other parts due to the heat applied from the high-temperature equipment. According to the second invention, heat from high-temperature equipment can be effectively blocked. According to the third invention, since the liquid is supplied to a position below the midpoint in the vertical direction of the multiple heat transfer fins within the liquid containment space, a high cooling effect can be maintained. According to the fourth invention, an appropriate amount of liquid can be supplied into the liquid-containing space, thereby maintaining the cooling effect and heat shielding effect appropriately. According to the fifth invention, a vapor layer can be reliably formed within the liquid containment space, thereby maintaining a constant cooling effect and enabling stable vapor formation from the water-cooled jacket. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic cross-sectional view of the water-cooling jacket 10 of this embodiment. [Figure 2] This is a cross-sectional view taken along line II-II in Figure 1. [Modes for carrying out the invention]

[0010] Next, embodiments of the present invention will be described based on the drawings. The water-cooling jacket of this embodiment is a structure provided for cooling high-temperature equipment and for heat shielding between the high-temperature equipment and the outside. It is designed to improve the durability of the water-cooling jacket itself while maintaining cooling performance for cooling high-temperature equipment and heat shielding performance for blocking heat transfer between the high-temperature equipment and the outside.

[0011] The equipment to which the water-cooled jacket of this embodiment is installed is equipment that handles or flows high-temperature liquids or gases. For example, furnaces such as self-melting furnaces and converters, flues provided in self-melting furnaces and converters, and equipment such as autoclaves and reaction vessels can be cited as equipment to which the water-cooled jacket of this embodiment is installed, but the equipment to which the water-cooled jacket of this embodiment is installed is not particularly limited.

[0012] In the following description, we will explain the case in which the water-cooling jacket of this embodiment is installed in a flow path (such as a flue) through which high-temperature gas flows, as a representative example.

[0013] <Water-cooled jacket 10 of this embodiment> In Figure 1, reference numeral 1 indicates a channel through which the water-cooling jacket 10 of this embodiment is provided. The water-cooling jacket 10 of this embodiment is provided on the wall surface 1w of this channel 1.

[0014] As shown in Figure 1, the water-cooled jacket 10 of this embodiment comprises an inner wall 11 attached to the wall surface 1w of the flow path 1, that is, the outer surface of the equipment on which the water-cooled jacket 10 of this embodiment (hereinafter sometimes simply referred to as the water-cooled jacket 10) is installed, and an outer wall 12 spaced apart from the inner wall 11. Furthermore, the lower end of the inner wall 11 and the lower end of the outer wall 12 are liquid-tightly connected, and the upper end of the inner wall 11 and the upper end of the outer wall 12 are connected by an upper wall 13. In addition, a pair of side walls 14, 14 are liquid-tightly connected to the side edges (left and right edges in Figure 2) of the inner wall 11, the outer wall 12, and the upper wall 13. In other words, the water-cooled jacket 10 of this embodiment has a structure in which a liquid-containing space 10h is liquid-tightly sealed from the outside by the inner wall 11, the outer wall 12, the upper wall 13, and the pair of side walls 14, 14 between the inner wall 11 and the outer wall 12. Furthermore, a bottom wall may be provided to connect the lower end of the inner wall 11 and the lower end of the outer wall 12. In this case, the upper surface of the bottom wall corresponds to the bottom of the liquid containment space 10h.

[0015] <Inner wall 11> An outer wall 12, an upper wall 13, and a pair of side walls 14, 14 of a water cooling jacket 10 are all formed of a metal plate such as a copper plate or a steel plate. Meanwhile, an inner wall 11 of the water cooling jacket 10 comprises: a base wall 11a formed of a metal plate such as a copper plate or a steel plate similarly to the outer wall 12 and the like; and a protective layer 11b provided on an outer surface of the base wall 11a, that is, a surface on a wall surface 1w side of a flow path 1. The protective layer 11b is formed of a material having a lower thermal conductivity than a material of the base wall 11a. For example, when the base wall 11a is formed of a copper plate or a steel plate, the protective layer 11b is formed of nickel-chromium alloy (Ni-Cr), iron-nickel-aluminum alloy (Fe-Ni-Al), aluminum titanate (Al2O3-TiO2), or the like.

[0016] <Liquid supply unit 20> Further, as shown in FIG. 2, one side wall 14 of the water cooling jacket 10 of the present embodiment is provided with a liquid supply unit 20 that supplies cooling water W to a liquid accommodating space 10h of the water cooling jacket 10 of the present embodiment. Specifically, the liquid supply unit 20 comprises: a storage unit 21 that stores the cooling water W to be supplied to the liquid accommodating space 10h; and a supply pipe 22 that supplies the cooling water W from the storage unit 21 to the water cooling jacket 10.

[0017] The storage unit 21 is installed such that a liquid level WL of the cooling water W stored therein is at the same height as a liquid level WL1 (hereinafter simply referred to as a designed liquid level WL1) in a state where an amount of the cooling water W necessary for the water cooling jacket 10 to exhibit predetermined cooling performance and heat shielding performance is accommodated in the liquid accommodating space 10h. Moreover, an amount of the cooling water W in the storage unit 21 is adjusted such that the liquid level WL maintains the same height as the designed liquid level WL1. In other words, the amount of the cooling water W in the storage unit 21 is adjusted so that a region above the designed liquid level WL1 in the liquid accommodating space 10h is in a state free of the cooling water W, that is, a vapor layer where vapor exists is formed.

[0018] One end of the supply pipe 22 communicates with the storage unit 21, and the other end is connected to a supply port formed at a lower end of the side wall 14. The supply pipe 22 is provided to allow communication between the inside of the storage unit 21 and a lower end portion of the liquid accommodating space 10h.

[0019] Further, the supply pipe 22 of the liquid supply unit 20 is not provided with any liquid feeding means such as a pump for feeding the cooling liquid W from the storage unit 21 to the liquid storage space 10h. That is, the liquid supply unit 20 is installed such that the cooling water W in the storage unit 21 is supplied by hydraulic head pressure through the supply pipe 22 to the lower end portion of the liquid storage space 10h.

[0020] <Exhaust unit 25> On the other hand, an exhaust unit 25 is provided at the upper end portion (the upper wall 13 in FIG. 1) of the water cooling jacket 10 of the present embodiment. The exhaust unit 25 is a pipe communicating between the inside of the liquid storage space 10h and the outside, and has a function of discharging vapor obtained by evaporating the cooling water W in the liquid storage space 10h. The structure of the exhaust unit 25 is not particularly limited, as long as it has a structure capable of discharging the vapor obtained by evaporating the cooling water W to the outside of the water cooling jacket 10 (that is, the outside of the liquid storage space 10h) and retaining non-evaporated cooling water W in the liquid storage space 10h.

[0021] <Heat transfer fins 15> As shown in FIG. 2, a plurality of heat transfer fins 15 are provided in the liquid storage space 10h of the water cooling jacket 10. The plurality of heat transfer fins 15 are members formed of a metal plate such as a copper plate or a steel plate similarly to the outer wall 12 and the like, and are arranged at predetermined intervals along the width direction (the left-right direction in FIG. 2) of the liquid storage space 10h of the water cooling jacket 10. For example, the plurality of heat transfer fins 15 are arranged such that the interval between adjacent heat transfer fins 15 is 80 to 160 mm.

[0022] Further, the lower ends of the plurality of heat transfer fins 15 are liquid-tightly connected to the bottom of the liquid storage space 10h of the water cooling jacket 10. On the other hand, the plurality of heat transfer fins 15 are provided such that the upper ends thereof are separated from the upper wall 13 of the water cooling jacket 10 by a predetermined distance. For example, the plurality of heat transfer fins 15 are provided such that the positions of the upper ends thereof are at about 2 / 3 of the height of the liquid storage space 10h.

[0023] Furthermore, the multiple heat transfer fins 15 are liquid-tightly connected at one end in the depth direction of the water cooling jacket 10 (the left-right end in Figure 1), that is, at the outer surface of the inner wall 11, that is, at the outer surface of the base wall 11a of the inner wall 11 (the surface on the liquid containment space 10h side). Also, the other ends of the multiple heat transfer fins 15 are liquid-tightly connected at the other end in the depth direction of the water cooling jacket 10, that is at the inner surface of the outer wall 13 (the surface on the liquid containment space 10h side). In other words, within the liquid containment space 10h of the water cooling jacket 10, there are multiple compartments 15h, each having an opening at the upper end, which are partitioned by adjacent pairs of heat transfer fins 15, 15, the base wall 11a of the inner wall 11, and the outer wall 13.

[0024] Furthermore, multiple heat transfer fins 15 are provided with notches 15c at their lower parts. Specifically, multiple heat transfer fins 15 are provided with notches 15c that connect adjacent chambers 15h. This allows the coolant W to move between adjacent chambers 15h through the notches 15c. Moreover, the notches 15c are provided at approximately the same height as the supply port formed in the side wall 14, which is the height to which one end of the supply pipe 22 of the liquid supply unit 20 is connected. Therefore, when coolant W is supplied from the supply pipe 22 of the liquid supply unit 20, the supplied coolant W is supplied to the lower parts of multiple chambers 15h through the notches 15c provided in the multiple heat transfer fins 15.

[0025] Since the water-cooled jacket 10 of this embodiment has the above-described configuration, if the water-cooled jacket 10 of this embodiment is installed on the wall 1w of the flow path 1 and cooling water W is supplied into the liquid containment space 10h of the water-cooled jacket 10, the heat from the wall 1w of the flow path 1 and the inner wall 11 of the water-cooled jacket 10 can be dissipated by the cooling water W. Therefore, it is possible to prevent damage to the wall 1w of the flow path 1 and the water-cooled jacket 10 itself due to heat supplied from the wall 1w of the flow path 1.

[0026] Furthermore, the inner wall 11 of the water-cooling jacket 10 in this embodiment is provided with a protective layer 11b made of a material with lower thermal conductivity than the base wall 11a, and this protective layer 11b is provided so as to be in contact with the outer surface of the wall 1w of the flow path 1. As a result, the flow of heat supplied to the cooling water W through the inner wall 11 can be made gentler. In other words, the temperature gradient within the inner wall 11 can be made gentler. Then, in addition to the function of transferring heat from the wall 1w of the flow path 1 to the cooling water W, the inner wall 11 of the water-cooling jacket 10 can also exhibit the effect of blocking heat from the wall 1w of the flow path 1 from the outside. In other words, the inner wall 11 of the water-cooling jacket 10 can be given the same insulation capacity as bricks used in heat shielding walls, and the temperature of the material in the flow path 1 can be maintained at a certain temperature.

[0027] Furthermore, since the water-cooling jacket 10 of this embodiment is made of a metal plate, it is easier to install on the wall surface 1w of the flow path 1 compared to bricks or the like. In other words, the water-cooling jacket 10 of this embodiment has the same heat insulation capacity as bricks or the like, while making installation work easier.

[0028] Furthermore, in the water-cooled jacket 10 of this embodiment, the amount of cooling water W supplied from the supply unit 20 is adjusted so that a certain amount of vapor layer is formed within the liquid-containing space 10h of the water-cooled jacket 10. When a vapor layer is formed within the liquid-containing space 10h, the amount of heat removed from the wall surface 1w of the flow path 1 decreases in that region. In other words, the vapor layer functions as a heat shield, so it is possible to prevent the temperature of the substance in the flow path 1 from dropping more than necessary.

[0029] On the other hand, while the provision of a protective layer 11b on the inner wall 11 of the water-cooling jacket 10 allows the inner wall 11 to have the aforementioned heat insulation capability, it reduces the heat dissipation performance (cooling performance) of the inner wall 11. However, in the water-cooling jacket 10 of this embodiment, multiple heat transfer fins 15 connected to the inner wall 11 are provided in the liquid containment space 10h. By providing multiple heat transfer fins 15, the contact area between the cooling water W and the multiple heat transfer fins 15 (members that perform heat transfer similar to the inner wall 11) can be increased, improving heat dissipation from the inner wall 11, etc., so that even if the inner wall 11 has heat insulation capability, the flow path 1 through the inner wall 11 can be effectively cooled.

[0030] Furthermore, when general industrial water is used as the cooling water W, inorganic substances derived from the cooling water W (mainly calcium (Ca) and magnesium (Mg) in industrial water) may precipitate and accumulate as sludge. In this case, the precipitated and accumulated sludge will obstruct heat removal from the inner wall 11, but by providing multiple heat transfer fins 15, heat can be effectively removed from the inner wall 11 even if precipitated and accumulated sludge is present.

[0031] Furthermore, in the water-cooled jacket 10 of this embodiment, the supply unit 20 is configured to supply cooling water W into the liquid containment space 10h by hydrostatic pressure. Therefore, it is possible to supply only the amount of cooling water W that is being discharged as steam, that is, only the amount that is insufficient in the liquid containment space 10h, into the liquid containment space 10h. Consequently, the amount of cooling water W used can be reduced, and since there is no need to use a pump or the like to supply the cooling water W, the structure of the water-cooled jacket 10 of this embodiment can also be simplified.

[0032] Furthermore, since the cooling water W in the liquid containment space 10h is heated by the heat supplied from the wall surface 1w of the flow path 1, an upward flow of heated cooling water W is generated within the liquid containment space 10h. If cooling water W is supplied from the top of the liquid containment space 10h in this situation, the flow of the supplied cooling water W and the cooling water W rising due to heating will interfere with each other, creating a turbulent flow that may cause wear on the inner wall 11, outer wall 12, side wall 14, heat transfer fins 15, etc. of the water cooling jacket 10. However, in the water cooling jacket 10 of this embodiment, since the supply pipe 22 is connected to the lower end of the liquid containment space 10h, the supplied cooling water W is supplied to the lower part of the liquid containment space 10h, and cooling water W is also supplied to the lower part of each chamber 15h. As a result, the generation of turbulence in the cooling water W as described above can be suppressed within each chamber 15h, and damage due to wear on the inner wall 11, outer wall 12, side wall 14, heat transfer fins 15, etc. can be suppressed.

[0033] Furthermore, in order to fully realize these effects, it is desirable to connect the supply pipe 22 to the liquid containment space 10h near the lowest end of the water-cooling jacket 10. However, the above-described effects can be obtained as long as the supply pipe 22 is connected to the liquid containment space 10h in such a way that the cooling water W is supplied to a position below the midpoint in the vertical direction of the heat transfer fins 15.

[0034] <About heat transfer fin 15> The number of heat transfer fins 15 to be installed in the liquid containment space 10h is not particularly limited; it should be set to a number that allows for appropriate heat dissipation. Also, although the above example described a case where the distance between adjacent heat transfer fins 15 is 80 to 160 mm, the distance between adjacent heat transfer fins 15 is not particularly limited. Multiple heat transfer fins 15 should be installed with an interval of sufficient space to prevent clogging between adjacent heat transfer fins 15, in other words, clogging within the chamber 15h. Note that the distance between adjacent heat transfer fins 15 may all be the same, or it may vary depending on the location.

[0035] <Regarding protective layer 11b> The protective layer 11b only needs to be made of a material with a lower thermal conductivity than the material of the base wall 11a, and the material is not particularly limited. In addition to the nickel-chromium alloy (Ni-Cr) mentioned above, for example, iron-nickel-aluminum alloy (Fe-Ni-Al) or aluminum titanate (Al2O3-TiO2) can be used.

[0036] The method for forming the protective layer 11b on the outer surface of the base wall 11a is not particularly limited. For example, the protective layer 11b may be formed by attaching a plate-shaped piece of the material described above to the outer surface of the base wall 11a, or the protective layer 11b made of the material described above may be provided on the outer surface of the base wall 11a by methods such as thermal spraying or plating. If the protective layer 11b is formed by thermal spraying, the thickness of the protective layer 11b can be easily adjusted, and the thickness of the protective layer 11b can also be increased, thereby improving the durability and heat insulation of the inner wall 11 to a desired degree.

[0037] <Regarding the formation of the vapor layer> In this embodiment of the water-cooled jacket 10, the amount of cooling water W supplied from the supply unit 20 is adjusted so that a certain amount of vapor layer is formed in the liquid containment space 10h of the water-cooled jacket 10. However, the temperature of the cooling water W supplied from the supply unit 20 to the liquid containment space 10h of the water-cooled jacket 10 is not particularly limited and should be at a temperature that allows for proper heat removal from the flow path 1.

[0038] In particular, if cooling water W adjusted to 50°C to 100°C, more preferably 80°C to 100°C, is supplied from the supply unit 20 into the liquid containment space 10h of the water-cooled jacket 10, the cooling water W can be kept constantly boiling in the liquid containment space 10h, thereby reliably and easily forming a vapor layer within the liquid containment space 10h. For example, a vapor layer can be constantly present in the region above the liquid surface WL1 of the cooling water W in the liquid containment space 10h.

[0039] Furthermore, when the temperature of the cooling water W is set to 50°C to 100°C, the cooling water W used is not particularly limited. For example, water heated in a boiler may be used, or exhaust steam drain may be supplied. Exhaust steam drain, in this context, refers to a high-temperature liquid obtained by condensing used steam after it has been used to heat a cooled object in a heat exchanger, and is a liquid that is usually discarded. [Examples]

[0040] To confirm the durability of the water-cooled jacket of the present invention, the water-cooled jacket was installed in an actual facility, and the condition of the water-cooled jacket was checked for damage.

[0041] The installed equipment was the boiler inlet (flue, hereinafter simply referred to as the flue) at the converter outlet, and the water-cooling jacket used had the structure shown in Figures 1 and 2. The detailed shape of the water-cooling jacket used is as follows. The heat transfer fins were installed up to a height of 800 mm from the bottom edge of the water-cooling jacket. Water-cooled jacket width: 3400mm Water-cooled jacket height: 1300mm Thickness (depth) of liquid storage space: 150 mm Protective layer thickness: 0.5mm Number of heat transfer fins: 24 (installed at 100-120mm intervals)

[0042] As a comparative example, a water-cooling jacket with the same structure as the example, except that it did not have a protective layer on the inner wall and did not have heat transfer fins, was installed in the flue, and the condition of the water-cooling jacket was checked.

[0043] The results showed that when the water-cooling jacket of the present invention was installed in the flue, there was no deformation, distortion, or punctures in the water-cooling jacket even after two years of use. Furthermore, it was confirmed that the protective layer on the inner wall maintained its initial thickness.

[0044] On the other hand, in the comparative example, the water-cooled jacket was found to have become distorted after 700 days of use, requiring replacement.

[0045] Based on these results, it has been confirmed that the water-cooled jacket of the present invention is highly durable and can be used for a long period of time. [Industrial applicability]

[0046] The water-cooled jacket of the present invention is suitable as equipment for cooling and heat-insulating the walls of furnaces and flues in non-ferrous metal smelting processes such as copper smelting. [Explanation of Symbols]

[0047] 1. Flow channel 1w wall surface 10 Water-cooled jackets 10h liquid containment space 11 Inner wall 11a Base wall 11b Protective layer 12 Exterior Walls 15 heat transfer fins 20 Liquid supply section 21 Storage section 22 Supply piping 25 Exhaust section

Claims

1. A water-cooling jacket installed on the outer surface of high-temperature equipment, An inner wall positioned on the outer surface of the high-temperature equipment, An outer wall provided at a distance from the inner wall such that a liquid-containing space is formed between it and the inner wall, A liquid supply unit that supplies liquid to the liquid storage space, It has an exhaust section that discharges the vapor produced when the liquid evaporates from the liquid containment space, The aforementioned inner wall is Base wall and, The base wall has a protective layer provided on its outer surface, which is made of a material with lower thermal conductivity than the base wall material. Multiple heat transfer fins are provided on the inner surface of the base wall, extending along the vertical direction of the base wall. The aforementioned liquid storage space is The liquid containment space is divided into multiple spaces by the multiple heat transfer fins. A water-cooled jacket characterized by the following features.

2. The material of the protective layer is a nickel-chromium alloy. The water-cooled jacket according to feature 1.

3. The aforementioned liquid supply unit is A storage section in which the liquid to be supplied to the liquid storage space is stored, It includes a supply pipe for supplying the liquid in the storage section to the liquid storage space, The aforementioned supply piping is It is connected to a position below the midpoint in the vertical direction of the aforementioned multiple heat transfer fins. A water-cooled jacket according to either one of claims 1 or 2.

4. The storage section is, The liquid storage space is positioned at a location where the hydrostatic pressure is such that it can supply a liquid to the liquid storage space in an amount that maintains a predetermined liquid level. The water-cooled jacket according to feature 3.

5. The aforementioned liquid supply unit is It has the function of supplying water at 50°C to 100°C to the aforementioned liquid storage space. The water-cooled jacket according to feature 1.

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