Metal tank cooling system for waste heat recovery

Abstract

The utility model discloses a metal tank cooling system for waste heat recovery, which comprises a spraying device, a heat exchange device and a cooling device, the spraying device comprises a spraying cavity, a spraying assembly is arranged in the spraying cavity, and a plurality of spraying ports are arranged on the spraying assembly; an electromagnetic valve is arranged between the spraying device and the heat exchange device and comprises a first valve port, a second valve port and a third valve port, and the first valve port communicates with the spraying cavity; the heat exchange device comprises a heat exchange pipe and a preheating pipe, the heat exchange pipe communicates with the second valve port, and the preheating pipe abuts against the heat exchange pipe; the third valve port is communicated with the cooling device; the temperature detector is arranged between the spraying device and the electromagnetic valve; and the temperature detector is electrically connected with the electromagnetic valve. The temperature of circulating water is detected through the temperature detector, when the temperature of the circulating water reaches a set value, the circulating water flows through the heat exchange device to recover heat, and energy conservation and environment protection are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of metal tank cooling, specifically relating to a waste heat recovery metal tank cooling system. Background Technology

[0002] Canned beverages are processed and sealed in metal cans, and are widely popular with consumers and businesses due to their ease of storage and transportation. In the production process of metal-canned beverages, the filled metal cans need to undergo high-temperature sterilization again, followed by cooling to ensure rapid cooling and improve production efficiency. Most existing cooling technologies for filled metal cans recycle the water after spraying to achieve energy conservation and environmental protection. However, in most cases, the recycled water is directly cooled by a cooling device, wasting the heat in the water.

[0003] In existing technologies, such as patent document CN107687732A, a cooling water circulation device for canned food production is disclosed. This device prevents the cooling water from being directly discharged after cooling by circulating water, thus saving water resources. However, this device cannot utilize the heat absorbed by the cooling water during the cooling process, resulting in heat loss and making it neither energy-efficient nor environmentally friendly. Summary of the Invention

[0004] To address the problems in existing technologies, this utility model proposes a waste heat recovery cooling system for metal tanks. The system uses a temperature detector to monitor the temperature of the circulating water. When the temperature of the circulating water reaches a set value, the first and second valve ports of the solenoid valve are connected, allowing the circulating water to flow through the heat exchange device to recover heat, thus achieving energy saving and environmental protection.

[0005] This invention is implemented as follows: A waste heat recovery metal tank cooling system includes a spray device, a heat exchange device, and a cooling device connected in sequence via pipelines. Circulating water circulates between the spray device, heat exchange device, and cooling device. The spray device includes a spray chamber, which dynamically conveys a high-temperature metal tank. The spray chamber is equipped with symmetrically arranged spray components, each with multiple spray nozzles. The spray nozzles spray low-temperature circulating water onto the high-temperature metal tank in the spray chamber. The low-temperature circulating water absorbs heat from the high-temperature metal tank, forming high-temperature circulating water that flows to the heat exchange device. This system saves water resources by recycling and reusing the high-temperature circulating water, and also reduces heat loss by recovering heat from the high-temperature circulating water through the heat exchange device, thus saving energy and protecting the environment.

[0006] After being cooled by the cooling device, the temperature of the circulating water is below 40°C. Therefore, circulating water with a temperature below 40°C is low-temperature circulating water, and circulating water with a temperature above or equal to 40°C is high-temperature circulating water.

[0007] A solenoid valve is provided between the spray device and the heat exchange device. The solenoid valve includes a first valve port as an inlet and a second and third valve port as outlets. The first valve port is connected to the spray chamber and to either the second or third valve port. The heat exchange device includes a heat exchange tube and a preheating tube. The heat exchange tube is connected to the second valve port, and the preheating tube is connected to other equipment and heat-transfer connected to the heat exchange tube. The third valve port is connected to the cooling device. The solenoid valve is used to control the flow direction of the high-temperature circulating water. When the high-temperature circulating water reaches the standard for heat recovery, the first valve port and the second valve port are connected, allowing the high-temperature circulating water to flow to the heat exchange device to recover heat, thus saving energy and protecting the environment. When the high-temperature circulating water does not reach the standard for heat recovery, the first valve port and the third valve port are connected, allowing the high-temperature circulating water to flow directly to the cooling device, thus improving cooling efficiency.

[0008] It also includes a temperature detector disposed between the spray device and the solenoid valve, the temperature detector being electrically connected to the solenoid valve. The temperature detector is used to detect the temperature of the circulating water; when the temperature of the circulating water is higher than or equal to a set value, the first valve port is connected to the second valve port; when the temperature of the circulating water is lower than the set value, the first valve port is connected to the third valve port.

[0009] Preferably, the spray assembly includes a spray plate fixed to the inner wall of the spray chamber, and a plurality of spray nozzles are disposed on the spray plate and arranged in an array. The array of spray nozzles on the spray plate makes the circulating water sprayed in the spray chamber more uniform. When multiple metal tanks are cooled simultaneously, the cooling effect of the multiple metal tanks can be guaranteed to be consistent, thereby improving the cooling efficiency of the metal tanks.

[0010] Preferably, the spray chamber is further provided with a transport mechanism, which includes a conveyor belt assembly and a material frame that is tractively connected to the conveyor belt assembly. The material frame has an opening at the top and multiple through holes on its side walls and bottom. The through holes allow the sprayed circulating water to enter the material frame more quickly, rapidly contacting and exchanging heat with the metal tank inside the material frame, thereby improving the cooling rate of the metal tank.

[0011] Specifically, the transport mechanism further includes a support portion adapted to the material frame. The support portion is symmetrically arranged on the outside of the conveyor belt assembly, and the material frame presses against the support portion. The support portion is used to support the material frame, reducing the load on the conveyor belt assembly, thereby reducing the rated power required for the conveyor belt assembly to operate, reducing the energy consumption of the conveyor belt assembly, and thus reducing the operating cost of the transport mechanism.

[0012] Specifically, the support unit or material frame is provided with multiple rollers evenly arranged along the conveyor belt's transport direction. These rollers reduce the friction between the support unit and the material frame, changing the friction mode from sliding friction to rolling friction. This reduces the load on the conveyor belt assembly, further reducing its rated power and improving its energy-saving effect.

[0013] Preferably, the cooling device includes a first cooling pipe and a second cooling pipe. One end of the first cooling pipe is connected to the heat exchange device and the solenoid valve, and the other end is connected to the spray device. The second cooling pipe contains refrigerant and is connected to an external cooling tower, which drives the refrigerant to flow within the second cooling pipe. The cooling tower is used to rapidly cool the circulating water, quickly converting the high-temperature circulating water into low-temperature circulating water, thereby increasing the water circulation rate of the cooling system and thus improving the production efficiency of the cooling system.

[0014] Specifically, the end of the first cooling pipe connected to the heat exchanger and the solenoid valve is equipped with a tee connector. The tee connector includes a fourth valve port, a fifth valve port, and a sixth valve port. The fourth valve port communicates with the third valve port, the fifth valve port communicates with the heat exchanger, and the sixth valve port communicates with the first cooling pipe. The tee connector is used to merge the circulating water from the heat exchanger and the circulating water directly from the solenoid valve into the same pipe, simplifying the piping structure of the cooling system and improving the convenience of future pipe maintenance.

[0015] Specifically, the heat exchange device further includes one-way valves corresponding to the heat exchange tubes. The inlet end of each one-way valve is connected to the heat exchange tube, and the outlet end is connected to the fifth valve port. The one-way valves are used to prevent circulating water flowing into the tee joint from the fourth valve port from flowing back into the heat exchange tube from the fifth valve port, which would reduce the water circulation rate in the cooling system and thus reduce the production efficiency of the cooling system.

[0016] Preferably, both the heat exchanger and the cooling device are detachable plate heat exchangers. The detachable plate heat exchanger allows for quick assembly and disassembly, enabling rapid maintenance or replacement in case of malfunction, thus improving the convenience of subsequent maintenance.

[0017] Preferably, when the temperature detector detects that the temperature of the circulating water is higher than or equal to 60°C, the first valve port is connected to the second valve port; when the temperature detector detects that the temperature of the circulating water is lower than 60°C, the first valve port is connected to the third valve port. When the temperature of the circulating water is higher than or equal to 60°C, the circulating water contains more heat, resulting in higher waste heat recovery efficiency and higher recovery value. By connecting the first and second valve ports, the circulating water flows through the heat exchange device to recover waste heat, which is energy-saving and environmentally friendly. When the temperature of the circulating water is lower than 60°C, the circulating water contains less heat, resulting in lower waste heat recovery efficiency and lower recovery value. By connecting the first and third valve ports, the circulating water flows directly to the cooling device, allowing the circulating water to cool rapidly, thereby accelerating the circulation rate of the circulating water and increasing the production efficiency of the cooling system.

[0018] The beneficial effects of this utility model are:

[0019] This invention proposes a waste heat recovery cooling system for metal tanks. A temperature detector monitors the temperature of the circulating water. When the temperature reaches a set value, the first and second ports of a solenoid valve connect, allowing the circulating water to flow through the heat exchange device to recover heat, thus saving energy and protecting the environment. When the temperature does not reach the set value, the first and third ports of the solenoid valve connect, allowing the circulating water to flow directly to the cooling device for rapid cooling, thereby accelerating the circulation rate and increasing the production efficiency of the cooling system. Attached Figure Description

[0020] Figure 1 This is a connection diagram of the cooling system of this utility model;

[0021] Figure 2 This is a schematic diagram of the spray device of the cooling system of this utility model;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of point a;

[0023] Figure 4 This is a schematic diagram of the spray assembly of the cooling system of this utility model;

[0024] Figure 5 This is a schematic diagram of the conveyor belt assembly of the cooling system of this utility model;

[0025] Figure 6 This is a schematic diagram of the material frame of the cooling system of this utility model.

[0026] Figure label:

[0027] 1. Spraying device; 2. Heat exchanger; 3. Cooling device; 4. Solenoid valve; 5. T-connector; 6. Check valve; 11. Spraying chamber; 12. Spraying assembly; 121. Spray plate; 122. Spray nozzle; 131. Conveyor belt assembly; 132. Material frame; 133. Bearing unit; 134. Roller; 1311. Power roller; 1312. Belt; 1321. Through hole. Detailed Implementation

[0028] 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 a part of the embodiments of the present utility model, and not all of them. 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.

[0029] like Figures 1-6 As shown, a waste heat recovery metal tank cooling system includes a spray device 1, a heat exchange device 2, and a cooling device 3 connected in sequence by pipelines. Circulating water flows between the spray device 1, heat exchange device 2, and cooling device 3. The spray device 1 includes a spray chamber 11, which dynamically conveys a high-temperature metal tank. Symmetrically arranged spray components 12 are provided within the spray chamber 11, and each spray component 12 has multiple spray nozzles 122. The spray nozzles 122 spray low-temperature circulating water into the high-temperature metal tank within the spray chamber 11. The low-temperature circulating water absorbs heat from the high-temperature metal tank, forming high-temperature circulating water that flows to the heat exchange device 2. This system saves water resources by recycling and reusing the high-temperature circulating water, and also reduces heat loss by recovering heat from the high-temperature circulating water through the heat exchange device 2, thus saving energy and protecting the environment.

[0030] In this embodiment, after the circulating water is cooled by the cooling device 3, the temperature is below 40°C. Therefore, circulating water with a temperature below 40°C is low-temperature circulating water, and circulating water with a temperature above or equal to 40°C is high-temperature circulating water.

[0031] In this embodiment, the spray assembly 12 includes a spray plate 121, which is fixed to the inner wall of the spray chamber 11. A plurality of spray nozzles 122 are disposed on the spray plate 121 and arranged in an array. The array of spray nozzles 122 on the spray plate 121 makes the circulating water sprayed within the spray chamber 11 more uniform. When multiple metal tanks are cooled simultaneously, the cooling effect of the multiple metal tanks is ensured to be consistent, thereby improving the cooling efficiency of the metal tanks.

[0032] In this embodiment, a transport mechanism is also provided inside the spray chamber 11. The transport mechanism includes a conveyor belt assembly 131 and a material frame 132 that is tractively connected to the conveyor belt assembly 131. The material frame 132 has an opening at the top and multiple through holes 1321 on its side walls and bottom. The through holes 1321 are used to allow the sprayed circulating water to enter the material frame 132 more quickly, and to rapidly contact and exchange heat with the metal tank inside the material frame 132, thereby improving the cooling rate of the metal tank.

[0033] In this embodiment, the conveyor belt assembly 131 includes a power roller 1311 disposed at both ends and a belt 1312 surrounding the power roller 1311. The power source of the power roller 1311 is sealed inside the roller, making the power roller 1311 waterproof and extending the service life of the conveyor belt assembly 131 in the spray environment.

[0034] Specifically, the transport mechanism further includes a support portion 133 adapted to the material frame 132. The support portion 133 is symmetrically arranged on the outer side of the conveyor belt assembly 131, and the material frame 132 presses against the support portion 133. The support portion 133 is used to support the material frame 132, reducing the load on the conveyor belt assembly 131, thereby reducing the rated power required by the conveyor belt assembly 131 during operation, reducing the energy consumption of the conveyor belt assembly 131, and thus reducing the operating cost of the transport mechanism.

[0035] Specifically, the support portion 133 or the material frame 132 is provided with a plurality of rollers 134 evenly arranged along the conveyor belt transport direction. The rollers 134 are used to reduce the friction between the support portion 133 and the material frame 132. The rollers 134 change the friction mode between the support portion 133 and the material frame 132 from sliding friction to rolling friction, thereby reducing the load on the conveyor belt assembly 131, further reducing the rated power of the conveyor belt assembly 131, and improving the energy-saving effect of the conveyor belt assembly 131.

[0036] In this embodiment, both the heat exchange device 2 and the cooling device 3 are detachable plate heat exchangers. The detachable plate heat exchangers allow for quick assembly and disassembly, enabling rapid maintenance or replacement when either the heat exchange device 2 or the cooling device 3 malfunctions, thus improving the convenience of subsequent maintenance.

[0037] A solenoid valve 4 is provided between the spray device 1 and the heat exchange device 2. The solenoid valve 4 includes a first valve port as an inlet and a second valve port and a third valve port as outlets. The first valve port is connected to the spray chamber 11 and to either the second or third valve port. The heat exchange device 2 includes a heat exchange tube and a preheating tube. The heat exchange tube is connected to the second valve port, and the preheating tube is connected to other equipment and heat-transfer connected to the heat exchange tube. The third valve port is connected to the cooling device 3. The solenoid valve 4 is used to control the flow direction of the high-temperature circulating water. When the high-temperature circulating water reaches the standard for heat recovery, the first valve port and the second valve port are connected, allowing the high-temperature circulating water to flow to the heat exchange device 2 to recover heat, thus saving energy and protecting the environment. When the high-temperature circulating water does not reach the standard for heat recovery, the first valve port and the third valve port are connected, allowing the high-temperature circulating water to flow directly to the cooling device 3, thus improving cooling efficiency.

[0038] In this embodiment, the other equipment is a high-temperature sterilization device for metal cans.

[0039] In this embodiment, the cooling device 3 includes a first cooling pipe and a second cooling pipe. One end of the first cooling pipe is connected to the heat exchange device 2 and the solenoid valve 4, and the other end is connected to the spray device 1. The second cooling pipe contains refrigerant and is connected to an external cooling tower, which drives the refrigerant to flow within the second cooling pipe. The cooling tower is used to rapidly cool the circulating water, quickly converting the high-temperature circulating water into low-temperature circulating water, thereby increasing the water circulation rate of the cooling system and thus improving the production efficiency of the cooling system.

[0040] Specifically, a three-way connector 5 is provided at one end of the first cooling pipe that connects to the heat exchange device 2 and the solenoid valve 4. The three-way connector 5 includes a fourth valve port, a fifth valve port, and a sixth valve port. The fourth valve port is connected to the third valve port, the fifth valve port is connected to the heat exchange pipe, and the sixth valve port is connected to the first cooling pipe. The three-way connector 5 is used to merge the circulating water from the heat exchange device 2 and the circulating water directly from the solenoid valve 4 into the same pipe, simplifying the piping structure of the cooling system and improving the convenience of later pipe maintenance.

[0041] Specifically, the heat exchange device 2 also includes one-way valves 6 corresponding to the heat exchange tubes. The inlet end of the one-way valve 6 is connected to the heat exchange tube, and the outlet end is connected to the fifth valve port. The one-way valve 6 is used to prevent circulating water flowing from the fourth valve port into the three-way connector 5 from flowing back into the heat exchange tube through the fifth valve port, which would reduce the water circulation rate in the cooling system and thus reduce the production efficiency of the cooling system.

[0042] It also includes a temperature detector disposed between the spray device 1 and the solenoid valve 4, the temperature detector being electrically connected to the solenoid valve 4. The temperature detector is used to detect the temperature of the circulating water. When the temperature of the circulating water is higher than or equal to a set value, the first valve port is connected to the second valve port; when the temperature of the circulating water is lower than the set value, the first valve port is connected to the third valve port.

[0043] In this embodiment, when the temperature detector detects that the temperature of the circulating water is higher than or equal to 60°C, the first valve port is connected to the second valve port; when the temperature detector detects that the temperature of the circulating water is lower than 60°C, the first valve port is connected to the third valve port. When the temperature of the circulating water is higher than or equal to 60°C, the circulating water contains more heat, resulting in higher waste heat recovery efficiency and higher recovery value. By connecting the first and second valve ports, the circulating water flows through the heat exchange device 2 to recover waste heat, which is energy-saving and environmentally friendly. When the temperature of the circulating water is lower than 60°C, the circulating water contains less heat, resulting in lower waste heat recovery efficiency and lower recovery value. By connecting the first and third valve ports, the circulating water flows directly to the cooling device 3, which rapidly cools the circulating water, thereby accelerating the circulation rate of the circulating water and increasing the production efficiency of the cooling system.

[0044] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A waste heat recovery metal tank cooling system, comprising a spray device, a heat exchange device, and a cooling device connected sequentially via pipelines, wherein circulating water circulates among the spray device, heat exchange device, and cooling device; the spray device includes a spray chamber, the spray chamber dynamically conveying a high-temperature metal tank, the spray chamber being provided with symmetrically arranged spray components, each spray component having multiple spray nozzles; the spray nozzles spray low-temperature circulating water onto the high-temperature metal tank within the spray chamber, the circulating water absorbing heat from the high-temperature metal tank and becoming high-temperature circulating water that flows to the heat exchange device, characterized in that... A solenoid valve is provided between the spraying device and the heat exchange device. The solenoid valve includes a first valve port as an inlet and a second valve port and a third valve port as outlets. The first valve port is connected to the spraying chamber and to either the second or third valve port. The heat exchange device includes a heat exchange tube and a preheating tube. The heat exchange tube is connected to the second valve port and to other equipment, and is heat-transfer connected to the heat exchange tube. The third valve port is connected to the cooling device. It also includes a temperature detector located between the spray device and the solenoid valve, the temperature detector being electrically connected to the solenoid valve.

2. The waste heat recovery metal tank cooling system according to claim 1, characterized in that, The spray assembly includes a spray plate, which is fixed to the inner wall of the spray chamber, and a plurality of spray nozzles are disposed on the spray plate and arranged in an array.

3. The waste heat recovery metal tank cooling system according to claim 1, characterized in that, The spray chamber is also equipped with a transport mechanism, which includes a transport belt assembly and a material frame that is drivenly connected to the transport belt assembly. The material frame has an opening at the top and multiple through holes on its side walls and bottom.

4. The waste heat recovery metal tank cooling system according to claim 3, characterized in that, The transport mechanism also includes a support portion adapted to the material frame, the support portion being symmetrically arranged on the outside of the conveyor belt assembly, and the material frame pressing against the support portion.

5. A waste heat recovery metal tank cooling system according to claim 4, characterized in that, The bearing section or material frame is provided with multiple rollers evenly arranged along the transport direction of the conveyor belt.

6. The waste heat recovery metal tank cooling system according to claim 1, characterized in that, The cooling device includes a first cooling pipe and a second cooling pipe. One end of the first cooling pipe is connected to the heat exchange device and the solenoid valve, and the other end is connected to the spray device. The second cooling pipe contains refrigerant and is connected to an external cooling tower. The external cooling tower drives the refrigerant to flow in the second cooling pipe.

7. A waste heat recovery metal tank cooling system according to claim 6, characterized in that, The first cooling pipe is provided with a three-way connector at one end where it is connected to the heat exchange device and the solenoid valve. The three-way connector includes a fourth valve port, a fifth valve port and a sixth valve port. The fourth valve port is connected to the third valve port, the fifth valve port is connected to the heat exchange pipe and the sixth valve port is connected to the first cooling pipe.

8. A waste heat recovery metal tank cooling system according to claim 7, characterized in that, The heat exchange device also includes one-way valves corresponding to the heat exchange tubes, with the inlet end of the one-way valve connected to the heat exchange tube and the outlet end connected to the fifth valve port.

9. A waste heat recovery metal tank cooling system according to claim 1, characterized in that, Both the heat exchanger and the cooling device are detachable plate heat exchangers.

10. A waste heat recovery metal tank cooling system according to claim 1, characterized in that, When the temperature detector detects that the temperature of the circulating water is higher than or equal to 60°C, the first valve port is connected to the second valve port; when the temperature detector detects that the temperature of the circulating water is lower than 60°C, the first valve port is connected to the third valve port.

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