Metallurgical slag heat exchange module and heat exchange system

Abstract

The metallurgical slag heat exchange module comprises a plurality of boiler pipes which are arranged in parallel at intervals; the welding plate is connected with the plurality of linearly arranged boiler tubes to form a plurality of membrane tube rows; the connecting plate is connected with two adjacent membrane tube rows to define a rectangular box structure, a closed or semi-closed heat exchange space is arranged in the center in the rectangular box structure, one end of the heat exchange space is a feed port, the other end of the heat exchange space is a discharge port, and the heat exchange space is arranged from top to bottom, so that metallurgical slag descends under the action of gravity; a communicating pipe is arranged between every two adjacent boiler pipes to communicate the boiler pipes. Metallurgical slag is naturally turned over in the descending process due to the arrangement of the membrane type tube rows, an extra power system is not needed, energy consumption is reduced, and material turning uniformity and efficiency are improved. The boiler pipe serves as a main heat exchange component, cooling water circulates through the communicating pipe, high-temperature metallurgical slag is in contact with the outer wall of the boiler pipe for heat transfer when descending, and efficient heat exchange is achieved. The heat exchange area is increased through the design of the membrane type tube bundle, the heat exchange efficiency is improved, and water resource consumption is reduced by adopting a cooling water recycling mode.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical slag treatment technology, and in particular to a metallurgical slag heat exchange module and heat exchange system. Background Technology

[0002] With the rapid development of the metallurgical industry, the treatment and utilization of metallurgical slag has become a focus of industry attention. Currently, the mainstream process for treating metallurgical slag in China involves using a roller crushing system to crush the high-temperature slag and then cooling it down to room temperature via water cooling. However, this traditional process has many drawbacks:

[0003] First, the roller crushing system requires a power system to provide its rotational force to achieve automatic material turning. This process consumes a large amount of kinetic energy, resulting in significant energy consumption. Furthermore, due to the inefficient turning process, additional power equipment may be needed, further increasing energy consumption. High-temperature metallurgical slag contains a large amount of heat energy; for example, high-temperature metallurgical slag at 1500-1600℃ contains the equivalent heat of 50-60 kg of standard coal. However, cooling the crushing system solely with water not only consumes a large amount of water resources but also has low heat exchange efficiency, leading to the waste of this valuable heat energy. During the water cooling process, a large amount of water is evaporated or carried away, failing to be effectively utilized and resulting in a significant waste of water resources. Utility Model Content

[0004] The purpose of this utility model is to disclose a new type of slag cooler structure, which can realize automatic material turning and heat dissipation through multiple boiler tubes, thereby accelerating the cooling speed and improving production efficiency.

[0005] To achieve the above objectives, this utility model discloses a metallurgical slag heat exchange module, comprising: multiple boiler tubes arranged in parallel and at intervals; a welding plate, which connects the multiple linearly arranged boiler tubes to form multiple membrane tube arrays; a connecting plate, which connects two adjacent membrane tube arrays to enclose a rectangular box structure, wherein a closed or semi-closed heat exchange space is provided in the center of the rectangular box structure, one end of the heat exchange space is an inlet and the other end is an outlet, and the inlet and outlet of the heat exchange space are arranged from top to bottom so that the metallurgical slag located in the heat exchange space falls due to its own gravity; and a connecting pipe, which is provided between adjacent boiler tubes to connect the boiler tubes to each other.

[0006] By adopting the above scheme and optimizing the arrangement of boiler tubes and membrane tube banks, as well as the structural design of the heat exchange space, the metallurgical slag can be naturally agitated during its descent, eliminating the need for an additional power system. This not only reduces energy consumption but also improves the uniformity and efficiency of material agitation. The boiler tubes, as the main heat exchange component, circulate cooling water through connecting pipes. During its descent, the high-temperature metallurgical slag contacts the outer wall of the boiler tubes, transferring heat to the cooling water for efficient heat exchange. Simultaneously, the membrane tube bank design increases the heat exchange area, further improving heat exchange efficiency. Compared to traditional water-cooling methods, this invention utilizes a cooling water recycling system, significantly reducing water consumption. The cooling water circulates within the boiler tubes, continuously absorbing heat from the metallurgical slag, and is then cooled by an external cooling system before being recycled or used directly for heating.

[0007] Furthermore, the arrangement of the membrane tube arrays is horizontal and / or vertical.

[0008] By adopting the above scheme, the combination of horizontal and vertical arrangement improves heat exchange efficiency.

[0009] Furthermore, the length, width, and height of the rectangular box structure range from 1m to 5m.

[0010] By adopting the above scheme, the metallurgical slag processing volume of different scales can be adapted. By adjusting the size of the box, the residence time of the metallurgical slag in the heat exchange space can be optimized to ensure sufficient heat exchange.

[0011] Furthermore, the rectangular box structure is provided with heat dissipation fins on the side facing the heat exchange space.

[0012] By adopting the above scheme, the heat dissipation fins significantly improve heat transfer efficiency by expanding the contact area between the surface of the box and the high-temperature metallurgical slag. They can also disturb the flow of metallurgical slag, form local turbulence, break the thermal boundary layer, and accelerate heat transfer.

[0013] Furthermore, the height of the heat dissipation fins is less than the height of the boiler tube.

[0014] By adopting the above scheme, when the height of the heat dissipation fins is lower than that of the boiler tubes, the high-temperature metallurgical slag needs to bypass the top of the fins when flowing through the boiler tubes, forming local turbulence, enhancing the direct contact between the fluid and the boiler tubes, and improving the overall heat exchange efficiency.

[0015] Furthermore, the spacing between two adjacent boiler tubes in the membrane tube bank is 100mm-500mm.

[0016] By adopting the above solutions, the optimized spacing reduces thermal stress concentration, extends the service life of boiler tubes, reduces the risk of leakage, and the reasonable spacing can improve thermal efficiency.

[0017] Furthermore, the connecting pipe is disposed between every two adjacent boiler tubes, and every two adjacent connecting pipes are staggered to form a serpentine flow channel within the membrane tube bank.

[0018] By adopting the above scheme, the cooling water in the connecting pipe can flow smoothly, thereby ensuring uniform mixing of internal heat, avoiding local overheating, and reducing the risk of thermal stress concentration in the boiler tubes.

[0019] Furthermore, the rectangular box structure is provided with a composite layer on the surface facing the heat exchange space. The composite layer includes a bottom chromium coating and a top silicon carbide coating, wherein the thickness of the silicon carbide coating is 0.5mm-3mm.

[0020] By adopting the above solution, basic antioxidant and corrosion-resistant properties are provided simultaneously.

[0021] A metallurgical slag heat exchange system includes at least two metallurgical slag waste heat recovery heat exchange modules. At least one of the metallurgical slag waste heat recovery heat exchange modules has a composite layer on the surface of its rectangular box structure. The two metallurgical slag waste heat recovery heat exchange modules are vertically assembled and fixed to each other so that the heat exchange space is continuous and sealed. The welding plates between the two metallurgical slag waste heat recovery heat exchange modules are staggered.

[0022] By adopting the above scheme, the modular design facilitates transportation, installation and maintenance, adapts to the needs of different metallurgical slag treatment scales, and the staggered arrangement of welding plates of adjacent modules can provide a material turning effect.

[0023] Furthermore, it also includes a support frame, which is wrapped around at least two metallurgical slag waste heat recovery heat exchange modules. The support frame includes a main discharge port, a main feed port, a main water inlet, and a main water outlet. The main discharge port is located at the bottom end of the support frame, the main feed port is located at the top end of the support frame, the main water inlet is located at the lower end of the side wall of the support frame, and the main water outlet is located at the upper end of the side wall of the support frame.

[0024] By adopting the above solution, the heat exchange module is wrapped and fixed, and the fluid inlet and outlet and material channel are integrated to achieve system integration.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] 1. By setting the feed inlet and discharge outlet vertically, the metallurgical slag achieves natural turning by its own gravity, avoiding the dependence of traditional roller crushing systems on the power system, significantly reducing energy consumption. The membrane tube exhaust channel located in the heat exchange space has a turning effect without the need for additional power equipment, further reducing energy consumption costs.

[0027] 2. The combination structure of boiler tubes and membrane tube bank greatly increases the heat exchange area. With the help of connecting pipes, it realizes efficient circulation of cooling water, which enables the heat of high temperature metallurgical slag (1500-1600℃) to be quickly transferred to the cooling water. The heat exchange efficiency is significantly improved compared with the traditional water cooling method. The recovered waste heat can be cooled by an external cooling system and then recycled, or directly used for heating and other scenarios, realizing the cascade utilization of energy.

[0028] 3. A closed-loop cooling water circulation system is adopted, which avoids the waste of a large amount of water resources due to evaporation or carry-away in traditional processes. Water consumption is reduced by more than 90%. The cooling water circulates continuously in the boiler tubes, and only a small amount of loss needs to be replenished, which greatly improves the water resource utilization rate.

[0029] 4. Multiple boiler tubes dissipate heat in parallel, and the water flow path is optimized by connecting pipes to accelerate the cooling speed of metallurgical slag, shorten the processing cycle, and the modular design supports continuous feeding and discharging, reducing equipment downtime and improving overall production efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional structural diagram of the membrane tube array according to an embodiment of the present invention;

[0032] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0033] Figure 3 This is a top view structural diagram of Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the disassembly structure of a heat exchange system according to an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the disassembly structure of a heat exchange system according to an embodiment of the present utility model;

[0036] Figure 6 This is a three-dimensional structural diagram of Embodiment 3 of the present invention;

[0037] Figure 7 This is a schematic diagram of the support frame structure according to an embodiment of the present utility model.

[0038] Explanation of main reference numerals: 1. Boiler tube; 11. Outlet; 12. Inlet; 2. Welded plate; 3. Connecting plate; 4. Membrane tube bank; 41. Horizontal membrane tube bank; 42. Longitudinal membrane tube bank; 5. Rectangular box structure; 51. Heat exchange space; 52. Feed inlet; 53. Discharge outlet; 6. Connecting pipe; 7. Heat dissipation fins; 8. Support frame; 81. Main discharge outlet; 82. Main feed inlet; 83. Main water inlet; 84. Main outlet. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0043] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0044] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0045] See embodiments of this utility model. Figures 1 to 7 As shown, a metallurgical slag heat exchange module is provided, including multiple boiler tubes 1, welding plates 2, and connecting plates 3. The boiler tubes 1 are arranged in parallel and spaced apart. The welding plates 2 connect the multiple linearly arranged boiler tubes 1 to form multiple membrane tube arrays 4. The connecting plates 3 connect between two adjacent membrane tube arrays 4 to enclose and form a rectangular box structure 5. A closed or semi-closed heat exchange space 51 is provided in the center of the rectangular box structure 5. One end of the heat exchange space 51 is a feed inlet 52, and the other end is a discharge outlet 53. The inlet 52 and outlet 53 of the heat exchange space 51 are arranged from top to bottom so that the metallurgical slag located in the heat exchange space 51 falls due to its own gravity. A connecting pipe 6 is arranged between adjacent boiler tubes 1 to connect them. By optimizing the arrangement of the boiler tubes 1 and the membrane tube array 4, as well as the structural design of the heat exchange space 51, the metallurgical slag can naturally tumble during its descent, eliminating the need for an additional power system. This not only reduces energy consumption but also improves the uniformity and efficiency of tumbling. The boiler tubes 1, as the main heat exchange components, achieve cooling water circulation through the connecting pipe 6. During the descent, the high-temperature metallurgical slag contacts the outer wall of the boiler tubes 1, transferring heat to the cooling water, achieving efficient heat exchange. Simultaneously, the design of the membrane tube array 4 increases the heat exchange area, further improving heat exchange efficiency. Compared with traditional water-cooling methods, this invention uses a cooling water recycling method, greatly reducing water consumption. Cooling water circulates within boiler tube 1, continuously absorbing heat from the metallurgical slag. It is then cooled by an external cooling system before being reused or used directly for heating and other applications requiring hot water.

[0046] Optionally, the membrane tube array 4 can be arranged horizontally, vertically, or a combination of both. The length, width, and height of the rectangular box structure 5 range from 1m to 5m, accommodating different volumes of metallurgical slag. By adjusting the box dimensions, the residence time of the metallurgical slag within the heat exchange space 51 can be optimized, ensuring sufficient heat exchange. The spacing between two adjacent boiler tubes 1 in the membrane tube array 4 is 100mm-500mm. Optimized spacing reduces thermal stress concentration, extends the service life of the boiler tubes 1, reduces the risk of leakage, and improves thermal efficiency.

[0047] Optionally, to improve the material handling effect, in some embodiments, heat dissipation fins 7 are provided on the side of the rectangular box structure 5 facing the heat exchange space 51. Specifically, the heat dissipation fins 7 are provided on the side of each boiler tube 1 facing the heat exchange space 51. Of course, in some embodiments, heat dissipation fins 7 can also be provided on the side of the welding plate 2 and the connecting plate 3 facing the heat exchange space 51. This embodiment does not limit the specific number or direction. It should be noted that the heat dissipation fins 7 need to be arranged crosswise to avoid being too close to each other. By expanding the contact area between the box surface and the high-temperature metallurgical slag, the heat dissipation fins 7 significantly improve the heat transfer efficiency, can disturb the flow of metallurgical slag, form local turbulence, break the thermal boundary layer, and accelerate heat transfer. Experiments show that after adding fins, the heat transfer coefficient can be increased by 30%-50%, and the heat recovery efficiency can be increased by more than 20%. Preferably, the height of the heat dissipation fins 7 is less than the height of the boiler tube 1. When the height of the heat dissipation fins 7 is lower than that of the boiler tube 1, the high-temperature metallurgical slag needs to bypass the top of the fins when flowing through the boiler tube 1, forming local turbulence. This enhances the direct contact between the fluid and the boiler tube 1 and reduces the obstruction of heat transfer by the "thermal boundary layer". The height difference between the fins and the boiler tube 1 creates a temperature gradient in the vertical direction. The high-temperature fluid preferentially contacts the upper part of the boiler tube 1, while the low-temperature fluid is further heat-exchanged by the fins in the lower part, improving the overall heat transfer efficiency.

[0048] Optionally, in order to improve the strength and heat resistance of the heat exchange module itself, a composite layer is also provided on the surface of the rectangular box structure 5 facing the heat exchange space 51. The composite layer includes a bottom chromium coating and a top silicon carbide coating, wherein the thickness of the silicon carbide coating is 0.5mm-3mm, which can simultaneously provide basic anti-oxidation and corrosion resistance.

[0049] The connecting pipe 6 is disposed between every two adjacent boiler tubes 1, and the two adjacent connecting pipes 6 are staggered to form a serpentine flow channel within the membrane tube bank 4. Preferably, the connecting pipe 6 is disposed at the ends of every two boiler tubes 1, thereby ensuring smooth flow of cooling water within the connecting pipe 6, thus guaranteeing uniform internal heat mixing, avoiding local overheating, and reducing the risk of thermal stress concentration in the boiler tubes 1.

[0050] In this embodiment 1, see Figure 2-3As shown, the boiler tubes 1 are arranged in parallel and horizontally with an adjacent spacing of 200mm. In other embodiments, this spacing can be adjusted to 100-500mm as needed. Welding plates 2 weld each horizontal row of boiler tubes 1 into membrane tube arrays 4. Adjacent membrane tube arrays 4 are vertically connected by connecting plates 3, forming a rectangular box structure 5 with equal length, width, and height, creating a closed heat exchange space 51 in the center. In other embodiments, the length, width, and height can also be inconsistent. The heat dissipation fins 7 are welded between adjacent boiler tubes 1, with a fin height equal to the height of the boiler tube 1. The heat dissipation fins 7 on each boiler tube 1 are radially and evenly distributed around its circumference. The surface of the rectangular box structure 5 facing the heat exchange space 51 is coated with a composite layer. The composite layer has a 0.2mm chromium coating at the bottom and a 1.5mm silicon carbide coating at the top. The connecting pipes 6 are staggered between adjacent boiler tubes 1 to form a serpentine flow channel. Cooling water enters from the bottom inlet 12 of the boiler tube 1 and flows back through the serpentine flow channel to the top outlet 11 of the boiler tube 1, thereby realizing the circulation of the internal heat exchange liquid.

[0051] When the high-temperature metallurgical slag enters the heat exchange space 51 from the top feed inlet 52, it sinks under gravity. The movement of the material relies on the gravity of the slag, with virtually no power consumption. The slag comes into contact with the horizontal membrane tube bank 4, and heat is transferred to the cooling water through the boiler tubes 1. After the cooling water is heated, steam or hot water is output from the outlet 11. For every ton of 1500℃ high-temperature metallurgical slag, more than 300 kg of saturated steam at a pressure of 1.6-4.0 MPa can be recovered. The heat dissipation fins 7 agitate the slag flow, creating localized turbulence and improving heat exchange efficiency.

[0052] In this embodiment 2, based on embodiment 1, the welding plate 2 is changed from welding each horizontal row of boiler tubes 1 into a membrane tube bank 4 to welding each vertical row of boiler tubes 1 into a membrane tube bank 4. The rest remains unchanged.

[0053] In this embodiment 3, participants Figure 6 As shown, based on Embodiment 1, the connecting plate 3 connecting multiple transverse membrane tube rows 41 is replaced with a longitudinal membrane tube row 42. Specifically, the transverse membrane tube row 41 includes five equally spaced boiler tubes 1, and each pair of boiler tubes 1 is fixed together by a welding plate 2. The transverse membrane tube row 41 is arranged in four rows. Then, the four longitudinally arranged boiler tubes 1 are fixed together by the welding plate 2 to form a longitudinal membrane tube row 42. Each boiler tube 1 in the longitudinal membrane tube row 42 is welded to the boiler tubes 1 in the four rows of transverse membrane tube rows 41. By welding the two sets of longitudinal membrane tube rows 42, the heat exchange module is sealed.

[0054] This utility model also relates to a metallurgical slag heat exchange system, including at least two metallurgical slag waste heat recovery heat exchange modules. The surface of the rectangular box structure 5 of at least one of the metallurgical slag waste heat recovery heat exchange modules is provided with a composite layer. The two metallurgical slag waste heat recovery heat exchange modules are vertically assembled and fixed to each other so that the heat exchange space 51 is continuous and sealed. The welding plates 2 between the two metallurgical slag waste heat recovery heat exchange modules are staggered. The modular design facilitates transportation, installation and maintenance, and adapts to the needs of different metallurgical slag treatment scales. The staggered arrangement of the welding plates 2 of adjacent modules can provide a material turning effect.

[0055] Specifically, in some embodiments, see [reference] Figure 4 As shown, the metallurgical slag waste heat recovery heat exchange system includes two metallurgical slag waste heat recovery heat exchange modules. The upper layer is the metallurgical slag waste heat recovery heat exchange module of Example 1, and the lower layer is the metallurgical slag waste heat recovery heat exchange module of Example 2. The boiler tube 1 between the two is sealed by a flange, and the welding plate 2 and the connecting plate 3 between the two are welded and sealed to make the heat exchange space 51 of the two continuous. The membrane tube array 4 in the heat exchange space 51 between the upper and lower layers are staggered by 90° to achieve turbulence and achieve an automatic material turning effect. Since the temperature of the slag in contact with the upper layer is higher than that of the lower layer, the upper layer is more prone to melting and breaking. Therefore, a composite layer is provided in the upper metallurgical slag waste heat recovery heat exchange module, and the lower layer can be coated according to the actual cooling effect.

[0056] In some embodiments, see Figure 5 As shown, the metallurgical slag waste heat recovery heat exchange system includes two metallurgical slag waste heat recovery heat exchange modules. The upper layer is the metallurgical slag waste heat recovery heat exchange module of Example 1, and the lower layer is the metallurgical slag waste heat recovery heat exchange module of Example 3. Since the upper layer has more boiler tubes 1 than the lower layer, the top of the excess boiler tubes 1 in the lower layer needs to be sealed by welding. Furthermore, the connecting plate 3 between the upper and lower layers will have a misalignment effect, serving as a material-turning effect. It should be noted that, since the heat exchange space 51 of the upper and lower supports in this embodiment is different in size, additional plates are needed to seal the connecting plate 3 or welding plate 2 on the outer layer to ensure a seal between the two modules.

[0057] In some embodiments, two or more metallurgical slag waste heat recovery heat exchange modules can be set. The heat exchange modules can be arbitrarily selected in embodiments 1-3. Of course, the specific structure of the metallurgical slag waste heat recovery heat exchange modules can also be matched according to actual needs.

[0058] To improve the aesthetics of the overall heat exchange system, a support frame 8 can be added. This support frame 8 encloses at least two metallurgical slag waste heat recovery heat exchange modules. The support frame 8 includes a main discharge port 81, a main feed port 82, a main water inlet 83, and a main water outlet 84. The main discharge port 81 is located at the bottom of the support frame 8 and communicates with the bottom of the heat exchange space 51 of the lowest module. The main feed port 82 is located at the top of the support frame 8 and communicates with the top of the heat exchange space 51 of the uppermost module. The main water inlet 83 is located at the lower end of the side wall of the support frame 8 and connects to the water inlet 12 at the bottom of the boiler tube 1 in the lowest module. Optionally, there may be multiple water inlets 12 at the bottom of the boiler tube 1 in the lower module, and the water flow can be converged through a converging pipe and then connected to the main water inlet 83. Of course, in some embodiments, to meet heat exchange efficiency requirements, the main water inlet 83 may be omitted, and multiple boiler tubes 1 can be directly connected to cold water. The main outlet 84 is located at the upper end of the side wall of the support frame 8 and is used to connect to the outlet 11 at the top of the boiler tube 1 in the uppermost module. Similarly, the outlet 11 can discharge the heat-exchanged hot water through the converging pipe for heat exchange, or it can directly transport the hot water to different areas through multiple boiler tubes 1.

[0059] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0060] 1. By setting the feed inlet 52 and the discharge outlet 53 vertically, the metallurgical slag is turned over naturally by its own gravity, avoiding the dependence of the traditional roller crushing system on the power system and significantly reducing energy consumption. The membrane tube row 4 air channel turning effect in the heat exchange space 51 does not require additional power equipment, further reducing energy consumption costs.

[0061] 2. The combined structure of boiler tube 1 and membrane tube bank 4 significantly increases the heat exchange area. Combined with connecting pipe 6, it achieves efficient circulation of cooling water, enabling the heat of high-temperature metallurgical slag (1500-1600℃) to be quickly transferred to the cooling water. The heat exchange efficiency is significantly improved compared with the traditional water cooling method. The recovered waste heat can be cooled by an external cooling system and then recycled, or directly used for heating and other scenarios, realizing the cascade utilization of energy.

[0062] 3. A closed-loop cooling water circulation system is adopted, which avoids the waste of a large amount of water resources due to evaporation or carry-away in traditional processes. Water consumption is reduced by more than 90%. The cooling water circulates continuously in boiler tube 1, and only a small amount of loss needs to be replenished, which greatly improves the water resource utilization rate.

[0063] 4. Multiple boiler tubes 1 provide parallel heat dissipation, and the water flow path is optimized by connecting pipes 6 to accelerate the cooling speed of metallurgical slag, shorten the processing cycle, and the modular design supports continuous feeding and discharging, reducing equipment downtime and improving overall production efficiency.

[0064] The above provides a detailed description of a metallurgical slag heat exchange module and heat exchange system disclosed in the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the metallurgical slag heat exchange module and heat exchange system of this utility model and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A metallurgical slag heat exchange module, characterized in that, include: Multiple boiler tubes (1) are arranged in parallel and at intervals; Welding plate (2), the welding plate (2) is respectively connected to a plurality of linearly arranged boiler tubes (1) to form a plurality of membrane tube banks (4); A connecting plate (3) is connected between two adjacent membrane tube banks (4) to enclose and form a rectangular box structure (5). A closed or semi-closed heat exchange space (51) is provided in the center of the rectangular box structure (5). One end of the heat exchange space (51) is a feed inlet (52) and the other end is a discharge outlet (53). The feed inlet (52) and discharge outlet (53) of the heat exchange space (51) are arranged from top to bottom so that the metallurgical slag located in the heat exchange space (51) falls due to its own gravity. A connecting pipe (6) is provided between adjacent boiler tubes (1) for connecting the boiler tubes (1) to each other.

2. The metallurgical slag heat exchange module according to claim 1, characterized in that, The arrangement of the membrane tubes (4) is horizontal and / or vertical.

3. The metallurgical slag heat exchange module according to claim 1, characterized in that, The length, width, and height of the rectangular box structure (5) range from 1m to 5m.

4. The metallurgical slag heat exchange module according to claim 1, characterized in that, The rectangular box structure (5) has heat dissipation fins (7) on the side facing the heat exchange space (51).

5. A metallurgical slag heat exchange module according to claim 4, characterized in that, The height of the heat dissipation fins (7) is less than the height of the boiler tube (1).

6. A metallurgical slag heat exchange module according to claim 1, characterized in that, The distance between two adjacent boiler tubes (1) in the membrane tube bank (4) is 100mm-500mm.

7. A metallurgical slag heat exchange module according to claim 1, characterized in that, The connecting pipe (6) is disposed between every two adjacent boiler tubes (1), and every two adjacent connecting pipes (6) are staggered to form a serpentine flow channel in the membrane tube bank (4).

8. A metallurgical slag heat exchange module according to any one of claims 1-7, characterized in that, The rectangular box structure (5) facing the heat exchange space (51) is also provided with a composite layer, which includes a bottom chromium coating and a top silicon carbide coating, wherein the thickness of the silicon carbide coating is 0.5mm-3mm.

9. A heat exchange system for metallurgical slag, characterized in that, The device includes at least two metallurgical slag heat exchange modules as described in any one of claims 1-8, wherein the surface of the rectangular box structure (5) of at least one of the metallurgical slag waste heat recovery heat exchange modules is provided with a composite layer, and each pair of metallurgical slag waste heat recovery heat exchange modules is vertically assembled and fixed to make the heat exchange space (51) continuous and sealed, and the welding plates (2) between each pair of metallurgical slag waste heat recovery heat exchange modules are staggered.

10. A metallurgical slag heat exchange system according to claim 9, characterized in that, It also includes a support frame (8), which is wrapped around at least two metallurgical slag waste heat recovery heat exchange modules. The support frame (8) includes a total discharge port (81), a total feed port (82), a total water inlet (83), and a total water outlet (84). The total discharge port (81) is located at the bottom of the support frame (8), the total feed port (82) is located at the top of the support frame (8), the total water inlet (83) is located at the lower end of the side wall of the support frame (8), and the total water outlet (84) is located at the upper end of the side wall of the support frame (8).

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