A finished product cooling system for a rotary hearth furnace

Abstract

The present invention discloses a rotary hearth furnace finished product cooling system, including a water supply unit, a cooling unit, a water return unit and a control unit, wherein the water supply unit, the cooling unit and the water return unit are connected in sequence, and the water supply unit is also connected to the water return unit, and the control unit is connected to the cooling unit and the water supply unit respectively; the cooling unit includes a cooling cylinder and a spray unit, the cooling cylinder is used to accommodate the rotary hearth furnace finished product, and the spray unit is used to cool the cooling cylinder; the water return unit is used to pump waste water generated by the cooling unit to the water supply unit; the water supply unit is used to provide the waste water to the cooling unit after a preset treatment; the control unit is used to adjust the cooling unit so that the rotary hearth furnace finished product achieves the expected cooling effect. The rotary hearth furnace finished product cooling system disclosed by the present invention solves the technical problems of internal structural damage of the rotary hearth furnace finished product after cooling and huge water consumption during the cooling process in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of a finished product cooling system for a rotary hearth furnace, and in particular to a finished product cooling system for a rotary hearth furnace. Background Art

[0002] At present, in the high-purity strontium hydroxide workshop, there are two cooling methods for high-purity strontium hydroxide finished balls, namely spray cooling and mist cooling. Generally, a separate drying pool is configured to provide water for the cooling system. However, the existing cooling method will cause structural damage to the finished ball on the one hand, and consume a huge amount of water on the other hand, which is not in line with environmental protection principles, and also leads to high manufacturing costs. Summary of the invention

[0003] The embodiment of the present application provides a rotary hearth furnace finished product cooling system, which solves the technical problems in the prior art of internal structural damage to the rotary hearth furnace finished products after cooling and huge water consumption during the cooling process, thereby achieving the technical effect of reducing internal structural damage to the rotary hearth furnace finished products after cooling and reducing water consumption.

[0004] This application provides the following technical solution through an embodiment of the present application:

[0005] A finished product cooling system of a rotary hearth furnace comprises a water supply unit, a cooling unit, a water return unit and a control unit, wherein the water supply unit, the cooling unit and the water return unit are connected in sequence, and the water supply unit is also connected to the water return unit, and the control unit is connected to the cooling unit and the water supply unit respectively;

[0006] The cooling unit comprises a cooling cylinder and a spray unit, wherein the cooling cylinder is used to accommodate the finished product of the rotary hearth furnace, and the spray unit is used to cool the cooling cylinder;

[0007] The water return unit is used to pump the waste water generated by the cooling unit to the water supply unit;

[0008] The water supply unit is used to provide the wastewater to the cooling unit after performing a preset treatment on the wastewater;

[0009] The control unit is used to adjust the cooling unit so that the finished product of the rotary hearth furnace can achieve the expected cooling effect.

[0010] Optionally, the cooling cylinder comprises a movably connected inner cylinder and a fixedly connected outer cylinder, and the finished rotary hearth furnace product is accommodated in the inner cylinder;

[0011] The spray unit includes a spray unit and a shower unit, wherein the spray unit is arranged on the inner wall of the outer cylinder and is used for spray cooling the inner cylinder;

[0012] The spray unit is arranged at two ends of the cooling cylinder and is used for spray cooling the cooling cylinder.

[0013] Optionally, the water supply unit comprises a low-pressure water supply unit and a high-pressure water supply unit connected to each other;

[0014] The low-pressure water supply unit includes a drying water tank and a low-pressure water supply pump. The drying water tank is used to perform impurity sedimentation and temperature reduction treatment on the wastewater transported by the return water unit so that the wastewater meets the reuse standard; the low-pressure water supply pump is used to pump the treated cooling water to the high-pressure water supply unit;

[0015] The high-pressure water supply unit includes a filter and a high-pressure water supply pump group. The filter is used to filter the cooling water provided by the low-pressure water supply unit, and the high-pressure water supply pump group is used to increase the pressure of the filtered cooling water and provide it to the cooling unit.

[0016] Optionally, the high-pressure water supply pump group is a high-pressure variable frequency water supply pump group, and the high-pressure variable frequency water supply pump group is connected to the spray unit, so that the pressure of the cooling water in the spray unit is adjustable.

[0017] Optionally, the high-pressure water supply unit further includes a low-pressure water supply pipeline, and the low-pressure water supply pipeline is connected to both ends of the cooling cylinder to perform the spray cooling with constant pressure and large flow rate on the two ends of the cooling cylinder.

[0018] Optionally, the low-pressure water supply unit also includes a water drying pool water supply pipe, which is connected to the workshop clean circulating water supply system and is used to replenish water for the water drying pool when the water storage capacity is insufficient.

[0019] Optionally, the water return unit includes a water return pump and a filter, the water return pump is used to extract wastewater generated by the cooling unit, and the filter is used to filter the wastewater.

[0020] Optionally, a siphon device is further provided between the water return unit and the cooling unit, and the siphon device is configured to have a fixed liquid level height so that the water return pump maintains a normal pressure working state.

[0021] Optionally, the control unit includes a temperature controller, and the temperature controller is used to monitor the surface temperature of the finished product of the rotary hearth furnace after being cooled by the cooling cylinder;

[0022] The control unit adjusts the rotation speed of the inner drum and the water outlet pressure of the spray unit according to the surface temperature, so that the finished product of the rotary hearth furnace can achieve the expected cooling effect.

[0023] Optionally, a venting pipeline is also provided on the surface of the cooling cylinder to recover high-temperature water vapor generated during the cooling process.

[0024] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0025] The rotary hearth furnace finished product cooling system provided in the present application comprises a water supply unit, a cooling unit, a water return unit and a control unit; wherein the water supply unit is connected to the cooling unit to provide cooling water to the cooling unit; and the cooling unit further comprises a cooling cylinder and a spray unit, wherein the rotary hearth furnace finished product is placed in the cooling cylinder, and the cooling cylinder is cooled by the spray unit to achieve cooling of the rotary hearth furnace finished product, thereby avoiding damage to the rotary hearth furnace finished product caused by direct contact between the cooling medium and the rotary hearth furnace finished product;

[0026] On the other hand, the present application sets up a return water unit to be connected to the cooling unit and the water supply unit respectively. The return water unit extracts the waste water generated by the cooling unit and sends it to the water supply unit. The water supply unit treats the waste water and then provides it to the cooling unit, thereby realizing the recycling of cooling water, greatly reducing water consumption, reducing manufacturing costs, and achieving the purpose of environmental protection.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the finished product cooling system of the rotary hearth furnace in the embodiment of the present application;

[0030] Figure 2 In the embodiments of this application, based on Figure 1 A schematic diagram of the structure of a finished product cooling system of a rotary hearth furnace;

[0031] Figure 3 In the embodiments of this application, according to Figure 2 A schematic diagram of a specific layout of a rotary hearth furnace finished product cooling system is shown in FIG. DETAILED DESCRIPTION

[0032] The embodiment of the present application provides a rotary hearth furnace finished product cooling system, thereby solving the technical problems in the prior art of internal structural damage of the rotary hearth furnace finished product after cooling and huge water consumption during the cooling process.

[0033] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0034] A finished product cooling system of a rotary hearth furnace is provided, comprising a water supply unit, a cooling unit, a water return unit and a control unit, wherein the water supply unit, the cooling unit and the water return unit are connected in sequence, and the water supply unit is also connected to the water return unit, and the control unit is connected to the cooling unit and the water supply unit respectively;

[0035] The cooling unit comprises a cooling cylinder and a spray unit, wherein the cooling cylinder is used to accommodate the finished product of the rotary hearth furnace, and the spray unit is used to cool the cooling cylinder;

[0036] The water return unit is used to pump the waste water generated by the cooling unit to the water supply unit;

[0037] The water supply unit is used to provide the wastewater to the cooling unit after performing a preset treatment on the wastewater;

[0038] The control unit is used to adjust the cooling unit so that the finished product of the rotary hearth furnace can achieve the expected cooling effect.

[0039] It should be noted that the rotary hearth furnace finished product cooling system provided in the present application can be applied to a high-purity strontium hydroxide workshop to cool the high-purity strontium hydroxide finished balls, or it can also be used to cool the finished balls of a similar type of rotary hearth furnace.

[0040] In order to better understand the above technical solution, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] First of all, the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] This embodiment provides a rotary hearth furnace finished product cooling system, such as Figure 1 As shown, including:

[0043] A water supply unit 1100, a cooling unit 1200, a water return unit 1300 and a control unit 1400, wherein the water supply unit 1100, the cooling unit 1200 and the water return unit 1300 are connected in sequence, and the water supply unit 1100 is also connected to the water return unit 1300, and the control unit 1400 is connected to the water supply unit 1100 and the cooling unit 1200 respectively.

[0044] The cooling unit 1200 includes a cooling cylinder 1210 and a spray unit 1220. The cooling cylinder 1200 is used to accommodate the finished product of the rotary hearth furnace, and the spray unit 1220 is used to cool the cooling cylinder 1210.

[0045] The water return unit 1300 is used to pump the waste water generated by the cooling unit 1200 to the water supply unit 1100;

[0046] The water supply unit 1100 is used to provide the wastewater to the cooling unit 1200 after performing a preset treatment on the wastewater;

[0047] The control unit 1400 is used to adjust the cooling unit 1200 so that the finished product of the rotary hearth furnace can achieve the expected cooling effect.

[0048] Combine the following Figure 1-2 The specific components of the rotary hearth furnace finished product cooling system provided in the embodiment of the present application are described in detail:

[0049] The rotary hearth furnace finished product cooling system of the present application includes a water supply unit 1100 , a cooling unit 1200 , a water return unit 1300 and a control unit 1400 .

[0050] In a specific embodiment, the water supply unit 1100 includes a low-pressure water supply unit 1110 and a high-pressure water supply unit 1120. The low-pressure water supply unit 1110 includes a drying tank 1111 and a low-pressure water supply pump 1112. The drying tank 1111 is used to perform impurity sedimentation and temperature reduction treatment on the wastewater transported by the return water unit 1300 so that the wastewater meets the reuse standard; and the low-pressure water supply pump 1112 is used to pump the treated cooling water to the high-pressure water supply unit 1120.

[0051] In a specific embodiment, the bottom of the drying water pool 1111 is set to a slope shape, and the interior of the drying water pool 1111 can be set to include two areas, one is a high-temperature sedimentation area, and the other is a low-temperature clean water area, wherein the height of the high-temperature sedimentation area is higher than the low-temperature clean water area, that is, the high-temperature sedimentation area is located at the upper part of the bottom slope of the drying water pool 1111, and the low-temperature clean water area is located at the lower part of the bottom slope of the drying water pool 1111, so as to settle large particles of impurities in the wastewater from the return water unit 1300.

[0052] In a specific embodiment, the high temperature settling area is connected to the return water unit 1300 through a water drying pool return pipe to store high temperature wastewater from the return water unit 1300. A cooling device is also provided in the high temperature settling area to cool the high temperature wastewater to the temperature standard of cooling water. The cooling device can be provided on the pool wall or the bottom of the high temperature settling area, and the present application does not limit this. In a specific implementation process, the high temperature wastewater from the return water unit 1300 is discharged into the high temperature settling area through the water drying pool return pipe for settling treatment, wherein the natural settling method can be used to deposit large particles in the wastewater to the bottom of the pool or to add particle adsorbents (activated carbon, etc.) in the high temperature settling area to simultaneously adsorb large particles in the water to accelerate the settling rate, and the present application does not limit this. In addition, when the high temperature wastewater enters the high temperature settling area, it is provided in the high temperature settling area to cool it down synchronously to reach the temperature required for cooling water reuse. After sedimentation and cooling treatment, the high-temperature wastewater from the return water unit 1300 can meet the standards for reuse and be transported to the low-temperature clean water area for subsequent use as cooling water.

[0053] In the specific implementation process, since the amount of water in the entire cooling system is not infinitely circulated (loss will occur), a water drying tank water supply pipe is also provided in the low-pressure water supply unit 1100, which is used to connect the workshop clean circulating water supply system and the low-temperature clean water area, so as to replenish water for the entire cooling system when the water level in the water drying tank is lower than the set safety water level.

[0054] In a specific embodiment, a submersible pump is provided between the low-temperature clean water area and the high-pressure water supply unit 1120 to pump cooling water in the low-temperature clean water area to the high-pressure water supply unit 1120 through low-pressure water supply.

[0055] The low-pressure water supply unit provided in the present application stores and treats the high-temperature wastewater generated after cooling by setting up a drying pool for recycling. It has a simple structure, is convenient for the implementation of the scheme and daily equipment maintenance, and because the cooling water is recycled, it can greatly reduce water consumption.

[0056] In a specific embodiment, the high-pressure water supply unit 1120 includes a filter 1121 and a high-pressure water supply pump group 1122. The filter 1121 is arranged between the low-pressure water supply unit 1110 and the high-pressure water supply pump group 1122, and is used to filter the cooling water provided by the low-pressure water supply unit 1110, remove foreign particles in the cooling water, and prevent clogging of the pipeline. In the specific implementation process, the filter 1121 can be a Y-type filter, a mesh filter, etc., and this application does not limit this. The high-pressure water supply pump group 1122 is arranged after the filter 1121 and is connected to the cooling unit 1200, and is used to boost the filtered cooling water and provide it to the cooling unit 1200. In the specific implementation process, the high-pressure water supply pump group 1122 can be a high-pressure variable frequency water supply pump group, so that the pressure of the cooling water provided to the cooling unit 1200 can be adjusted according to the actual cooling situation, thereby saving water.

[0057] In a specific embodiment, the cooling unit 1200 includes a cooling cylinder 1210 and a spray unit 1220. The cooling cylinder 1200 is configured to be cylindrical and used to accommodate the finished product of the rotary hearth furnace. The spray unit 1220 is used to cool the cooling cylinder 1210. The cooling cylinder 1210 includes an inner cylinder 1211 that is movably connected and an outer cylinder 1212 that is fixedly connected. The finished product of the rotary hearth furnace is accommodated in the inner cylinder 1211. The inner cylinder 1211 is configured to rotate around the central axis. The spray unit 1220 includes a spray unit 1221 and a spray unit 1222. The spray unit 1221 is disposed on the inner wall of the outer cylinder 1212 and is used to spray cool the inner cylinder 1211. The spray unit 1222 is disposed at both ends of the cooling cylinder 1210 and is used to spray cool the cooling cylinder 1210. In the specific implementation process, the spray unit 1221 is composed of a plurality of 120° solid cone nozzles arranged according to a preset position. For example, in order to ensure the uniformity of the spray, the 120° solid cone nozzles can be arranged along the circumferential direction of the cooling cylinder 1210, with 4 nozzles arranged on each circle, and a total of 6 circles arranged along the central axis of the cooling cylinder 1210 (that is, a total of 24 120° solid cone nozzles are arranged). Of course, the number and arrangement position of the 120° solid cone nozzles can be dynamically adjusted according to the actual size of the cooling cylinder. For example, 5 nozzles can be arranged on each circle, with a total of 8 circles, etc., and there is no limitation here. The spray unit 1222 is composed of a plurality of 0° injection nozzles, which are used for performing large-flow spray cooling on the two ends of the cooling cylinder 1210. As an optional embodiment, three 0° injection nozzles can be respectively arranged at the two ends of the cooling cylinder, and the three 0° injection nozzles at each end are arranged along the circumferential direction. The water pressure of the spray can be set to 0.2 MPa and the spray distance can be set to 1.2 m.

[0058] In a specific embodiment, the control unit 1400 is connected to the cooling unit 1200 and the water supply unit 1100 respectively, and is used to adjust the cooling unit 1200 so that the finished rotary hearth furnace achieves the expected cooling effect. In a specific implementation process, the control unit 1400 includes a temperature controller 1410, and the temperature controller 1410 is used to monitor the surface temperature of the finished rotary hearth furnace after being cooled by the cooling cylinder 1210; the control unit 1400 adjusts the rotation speed of the inner cylinder 1211 and the water outlet pressure of the spray unit 1221 according to the monitored surface temperature, so that the finished rotary hearth furnace achieves the expected cooling effect, and can also adjust the water output of the spray unit 1221 according to the actual situation, so as to achieve the purpose of saving water.

[0059] In the specific implementation process, the control unit 1400 monitors the surface temperature of the finished rotary hearth furnace product after cooling in real time. When the temperature is high, the control unit 1400 can increase the pressure of the high-pressure water supply pump group 1122, thereby increasing the water outlet pressure of the spray unit 1221 connected to the high-pressure water supply pump group 1122, so that the water outlet rate of the spray unit 1221 is improved, and more heat can be taken away per unit time, thereby reducing the surface temperature of the finished rotary hearth furnace product; when the surface temperature of the finished rotary hearth furnace product after cooling is low, the control unit 1400 can perform the opposite operation to achieve the expected cooling effect of the finished rotary hearth furnace product. By setting the water outlet pressure of the spray unit 1221 to be adjustable, the cooling effect of the finished rotary hearth furnace product can be dynamically adjusted, while avoiding the waste of water resources caused by a fixed water outlet, and saving cooling water. In addition, the control unit 1400 can also control the rotation speed of the inner drum 1211 according to actual conditions. Specifically, when the finished product of the rotary hearth furnace is of small specifications (for example, if the finished ball is spherical, the specification may be the diameter of the finished ball) and / or the quantity is small, the rotation speed of the inner drum 1211 may be increased to reduce the cooling time; when the finished product of the rotary hearth furnace is of large specifications and / or the quantity is large, the control unit 1400 may control the rotation speed of the inner drum 1211 to be reduced so that the heat of the finished product of the rotary hearth furnace can be evenly taken away to achieve the expected cooling effect.

[0060] In addition, a venting pipeline is provided on the surface of the cooling cylinder 1200 to recover the high-temperature water vapor generated during the cooling process, thereby saving the steam cost of the workshop.

[0061] In the specific implementation process, the temperature of the cooling water passing through the cooling unit 1200 is very high, and it needs to be transported to the air-drying pool through the return water unit 1300 for treatment before being provided to the cooling unit 1200 as low-temperature cooling water to cool the finished product of the rotary hearth furnace. In a specific embodiment, the return water unit 1300 includes a return water pump 1310 and a filter 1320. The return water pump 1310 is used to extract the high-temperature water generated by the cooling unit 1200, and the filter 1320 is used to filter the high-temperature water to remove impurities in the high-temperature water and prevent pipeline blockage. In an optional embodiment, a siphon device is also provided between the return water unit 1300 and the cooling unit 1200. The siphon device is configured with a fixed liquid level height so that the return water pump 1310 maintains a normal pressure working state, avoids the return water pump 1310 from empty suction, thereby extending the service life of the return water pump and ensuring the safe operation of the entire cooling system.

[0062] Combine the following Figure 3 A specific structural layout of the finished product cooling system of the rotary hearth furnace provided in the embodiment of the present application is described as follows:

[0063] exist Figure 2 In the figure, the finished product cooling system of the rotary hearth furnace is divided by dotted lines, where 1 is the low-pressure water supply unit, 2 is the high-pressure water supply unit, 3 is the injection unit, 4 is the siphon cylinder, 5 is the return water unit, 6 is the cooling cylinder, and 7 is the control unit. The names of the valves are marked on Figure 2 The corresponding position in .

[0064] In the specific implementation process, the low-pressure water supply unit 1 transports the cooling water in the drying pool to the high-pressure water supply unit 2. The high-pressure water supply unit 2 provides high-pressure and low-pressure water supply to the cooling cylinder 6 respectively through the high-pressure pump group and the spray water supply pipe at the end of the cooling cylinder. The high-pressure water supply is provided to the spray cooling part in the injection unit 3 to provide a high-flow rate cooling spray to the cooling cylinder 6, so that the finished product of the rotary hearth furnace can be cooled more evenly, while the low-pressure water supply is provided to the spray cooling part of the injection unit 3 to provide a large flow of cooling water to the cooling cylinder 6, thereby increasing the cooling area of ​​the finished product of the rotary hearth furnace and allowing the finished product of the rotary hearth furnace to be cooled faster.

[0065] The control unit 7 frequency-controls the rotation speed of the high-pressure pump group in the high-pressure water supply unit 2 according to the finished product detection temperature at the outlet of the cooling cylinder 6, thereby changing the injection pressure of the spray cooling in the injection unit 3 and adjusting the cooling effect on the cooling cylinder 6; in addition, the control unit 7 also frequency-controls the rotation speed of the cooling cylinder 6, thereby changing the cooling time of the finished ball. Specifically, when the finished product specifications are large and the quantity is large, the cooling time is increased accordingly, and when the finished product specifications are small and the quantity is small, the cooling time is reduced accordingly, thereby realizing dynamic and flexible control of the cooling process, while achieving the cooling effect and saving water.

[0066] The siphon tube 4 is arranged between the return water unit 5 and the cooling tube 6, which ensures the minimum return water level of the return water unit 5, so that the water supply pressure of the low-pressure return water pump of the return water unit 5 is normal pressure water supply, and the service life of the return water pump is extended. An overflow port is also arranged in the siphon tube 4. When the liquid level of the siphon tube 4 is too high and the return water unit 5 cannot be discharged in time, the cooling water can be automatically discharged from the siphon tube 4 through the overflow port and flow into the drainage ditch, ensuring the safety performance of the cooling water return.

[0067] The return water unit 5 transports the high-temperature water generated by the cooling cylinder 6 to the high-temperature sedimentation area in the low-pressure water supply unit 1 for impurity sedimentation and temperature reduction treatment, and then the water can be circulated and used as new cooling water.

[0068] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0069] The rotary hearth furnace finished product cooling system provided in the present application comprises a water supply unit, a cooling unit, a water return unit and a control unit; wherein the water supply unit is connected to the cooling unit to provide cooling water to the cooling unit; and the cooling unit further comprises a cooling cylinder and a spray unit, wherein the rotary hearth furnace finished product is placed in the cooling cylinder, and the cooling cylinder is cooled by the spray unit to achieve cooling of the rotary hearth furnace finished product, thereby avoiding damage to the rotary hearth furnace finished product caused by direct contact between the cooling medium and the rotary hearth furnace finished product;

[0070] On the other hand, the present application sets up a return water unit to be connected to the cooling unit and the water supply unit respectively. The return water unit extracts the waste water generated by the cooling unit and sends it to the water supply unit. The water supply unit treats the waste water and then provides it to the cooling unit, thereby realizing the recycling of cooling water, greatly reducing water consumption, reducing manufacturing costs, and achieving the purpose of environmental protection.

[0071] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A finished product cooling system of a rotary hearth furnace, characterized in that: It comprises a water supply unit, a cooling unit, a water return unit and a control unit, wherein the water supply unit, the cooling unit and the water return unit are connected in sequence, and the water supply unit is also connected to the water return unit, and the control unit is connected to the cooling unit and the water supply unit respectively; The cooling unit comprises a cooling cylinder and a spray unit, wherein the cooling cylinder is used to accommodate the finished product of the rotary hearth furnace, and the spray unit is used to cool the cooling cylinder; The water return unit is used to pump the waste water generated by the cooling unit to the water supply unit; The water supply unit is used to provide the wastewater to the cooling unit after performing a preset treatment on the wastewater; The control unit is used to adjust the cooling unit so that the finished product of the rotary hearth furnace achieves the expected cooling effect; The cooling cylinder comprises an inner cylinder which is movably connected and an outer cylinder which is fixedly connected, and the finished rotary hearth furnace product is accommodated in the inner cylinder; The spray unit includes a spray unit and a shower unit, wherein the spray unit is arranged on the inner wall of the outer cylinder and is used for spray cooling the inner cylinder; The spray unit is arranged at two ends of the cooling cylinder and is used for spray cooling the cooling cylinder; The water supply unit comprises a low-pressure water supply unit and a high-pressure water supply unit connected to each other; The low-pressure water supply unit includes a drying water tank and a low-pressure water supply pump. The drying water tank is used to perform impurity sedimentation and temperature reduction treatment on the wastewater transported by the return water unit so that the wastewater meets the reuse standard; the low-pressure water supply pump is used to pump the treated cooling water to the high-pressure water supply unit; The high-pressure water supply unit includes a filter and a high-pressure water supply pump group, wherein the filter is used to filter the cooling water provided by the low-pressure water supply unit, and the high-pressure water supply pump group is used to increase the pressure of the filtered cooling water and supply it to the cooling unit; The high-pressure water supply pump group is a high-pressure variable-frequency water supply pump group, and the high-pressure variable-frequency water supply pump group is connected to the spray unit, so that the pressure of the cooling water in the spray unit is adjustable; The high-pressure water supply unit also includes a low-pressure water supply pipeline, which is connected to both ends of the cooling cylinder to perform the spray cooling at a constant pressure and a large flow rate on the two ends of the cooling cylinder; A dissipation pipeline is also arranged on the surface of the cooling cylinder to recover the high-temperature water vapor generated during the cooling process.

2. The cooling system according to claim 1, characterized in that The low-pressure water supply unit also includes a water supply pipe for a drying water pool, which is connected to the workshop clean circulating water supply system and is used to replenish water for the drying water pool when the water storage capacity of the drying water pool is insufficient.

3. The cooling system according to claim 1, characterized in that The water return unit comprises a water return pump and a filter. The water return pump is used to extract waste water generated by the cooling unit, and the filter is used to filter the waste water.

4. The cooling system according to claim 3, characterized in that A siphon device is also provided between the water return unit and the cooling unit. The siphon device is configured to have a fixed liquid level height so that the water return pump maintains a normal pressure working state.

5. The cooling system according to claim 1, characterized in that: The control unit includes a temperature controller, and the temperature controller is used to monitor the surface temperature of the finished product of the rotary hearth furnace after being cooled by the cooling cylinder; The control unit adjusts the rotation speed of the inner drum and the water outlet pressure of the spray unit according to the surface temperature, so that the finished product of the rotary hearth furnace can achieve the expected cooling effect.

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