Kaolin calcining waste heat recycling equipment

Abstract

The invention relates to the technical field of waste heat recycling equipment, and particularly discloses kaolin calcining waste heat recycling equipment which comprises a fixed base, a first supporting frame is fixedly connected to the top of the fixed base, and a second recycling tank is fixedly connected to the top of the first supporting frame through a support. One side of the first supporting frame is fixedly connected with a second supporting frame, one side of the second utilization box communicates with a second recycling tank through a pipeline, the top of the supporting frame is fixedly connected with a first recycling tank and a first utilization box, and the two sides of the first recycling tank communicate with heat exchange pipes; the bottom of the second recovery tank penetrates through and is rotationally connected with a spraying mechanism, the inner wall of the second recovery tank is fixedly connected with a drying mechanism, according to the waste heat recycling equipment for calcining kaolin, through preheating treatment in the first recovery tank and filtering of impurities in hot air, the waste heat recycling efficiency is improved, the drying mechanism is arranged, and the waste heat recycling efficiency is improved. And heat loss during waste heat recycling is avoided.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery and utilization equipment, specifically to a waste heat recovery and utilization equipment for calcining kaolin. Background Technology

[0002] Calcined kaolin is an indispensable key raw material for many industries such as ceramics, papermaking, rubber, and coatings. In its production process, the material needs to undergo a calcination process of dehydration, dehydroxylation, and crystal transformation in high-temperature equipment such as rotary kilns or shuttle kilns. While this process endows kaolin with excellent whiteness, porosity, and chemical stability, it is also accompanied by huge energy consumption. According to statistics, in the traditional calcination process, fuel costs can account for nearly half of the total production cost. If the sensible heat carried by the exhaust gas from the kiln and the latent heat released during product cooling are not utilized and are directly emitted, it will not only cause serious energy waste, but also exacerbate the greenhouse effect and thermal pollution in the production environment. At present, in the field of industrial thermal energy management, waste heat recovery has been recognized as a core link in improving energy efficiency and reducing energy consumption and production costs.

[0003] Chinese patent CN118903975A discloses a waste gas purification and waste heat recovery and utilization device for glass annealing furnaces, which can achieve the effect of filtering and cleaning waste gas to improve energy utilization. However, it cannot achieve the effect of drying the recovery tank after spraying and preheating the recovery tank, so the heat cannot be fully utilized due to the large temperature difference between the hot gas and the tank. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides the following technical solution: a waste heat recovery and utilization device for calcined kaolin, comprising a fixed base, a first support frame fixedly connected to the top of the fixed base, a second recovery tank fixedly connected to the top of the first support frame via a bracket, a second support frame fixedly connected to one side of the first support frame, a second utilization box fixedly connected to the top of the second support frame, and a pipe connecting one side of the second utilization box to the second recovery tank. Support frames are fixedly connected to the top of the fixed base on both sides of the first support frame, and the first recovery tank and the first utilization box are fixedly connected to the top of the support frames respectively. Heat exchange tubes are connected to both sides of the first recovery tank. The end of the heat exchange tube away from the first recovery tank is connected to the first utilization box. The first utilization box is connected to one side of the second utilization box through a pipe. The first recovery tank passes through the top of the support frame and is connected to the top of the second recovery tank. A spraying mechanism is connected through and rotatably to the bottom of the second recovery tank. A waste discharge pipe is connected to the bottom of the second recovery tank on the side of the spraying mechanism. A drying mechanism is fixedly connected to the inner wall of the second recovery tank. A hot air fan is fixedly connected to the top of the support frame through a bracket. A hot air pipe is connected to one side of the hot air fan. The end of the hot air pipe away from the hot air fan passes through the top of the support frame and extends into the interior of the second recovery tank. The part of the hot air pipe extending into the interior of the second recovery tank is connected to the drying mechanism.

[0005] Preferably, the first recycling tank includes a tank body, an air inlet pipe connected to the side of the tank body, a preheating pipe fixedly connected to the inner wall of the tank body, a fixing ring fixedly connected to the inner wall of the tank body, a filter cylinder fixedly connected to the inner wall of the fixing ring, filter holes evenly distributed on the side of the filter cylinder, the air inlet pipe extending into the tank body and communicating with the filter cylinder, a safety valve connected to the top of the tank body, a cleaning mechanism fixedly connected to the top of the inner wall of the tank body, the tank body penetrating the top of the support frame and communicating with the top of the second recycling tank, and heat exchange pipes connected to both sides of the tank body. The preheating pipe is activated first. The interior of the first recovery tank is preheated to a suitable temperature. The high-temperature gas generated by calcining kaolin is introduced into the first recovery tank through the inlet pipe. First, impurities in the gas are intercepted through the filter holes of the filter cartridge. The preheated tank body prevents heat loss due to excessive temperature difference. The filtered high-temperature gas exchanges heat with the heat exchange tube. The heat absorbed by the heat exchange tube is transferred to the first utilization box for storage and recycling, completing the first-stage waste heat recovery. This reduces the loss of waste heat in the initial stage of recovery, improves the efficiency of the first-stage waste heat recovery, and filters impurities to prevent wear or blockage of subsequent equipment, ensuring the stable operation of the recovery system.

[0006] Preferably, the cleaning mechanism includes a cleaning circular plate, on the side of which cleaning brushes are uniformly fixedly connected, and a guide rod is uniformly penetrated and slidably connected to the top of the cleaning circular plate. A threaded rod is penetrated and threadedly connected to the top of the cleaning circular plate, and a drive shaft of a drive motor is fixedly connected to the top of the threaded rod.

[0007] Preferably, the guide rod is fixedly connected to the top of the tank, the drive shaft of the drive motor passes through the top of the inner wall of the tank and is rotatably connected to the tank, the drive motor is fixedly connected to the top of the tank, and the threaded rod extends into the second recovery tank and is fixedly connected to the top of the spraying mechanism. After the first recovery tank has been used for a long time, the drive motor is started to drive the threaded rod to rotate. Since the threaded rod is threadedly connected to the cleaning disc, and the guide rod restricts the cleaning disc to move only up and down, the rotation of the threaded rod drives the cleaning disc to slide up and down along the guide rod. During the movement, the cleaning brush on the side of the cleaning disc brushes away the impurities attached to the inner wall of the filter cylinder and the filter holes, avoiding the accumulation and blockage of impurities, automatically cleaning the impurities in the filter cylinder, preventing the filter holes from being blocked and affecting the heat exchange efficiency, maintaining the stability and efficiency of the first-stage waste heat recovery, and reducing the cost of manual cleaning.

[0008] Preferably, the spraying mechanism includes a rotating tube with a water inlet pipe connected to its bottom. The water inlet pipe is rotatably connected to the bottom of the rotating tube. Semi-circular rotating boxes are connected to both sides of the rotating tube. Spray holes are evenly distributed on the sides of the semi-circular rotating boxes. The rotating tube penetrates the bottom of the inner wall of the second recovery tank and is rotatably connected to it. The top of the rotating tube is fixedly connected to the portion of the threaded rod extending into the second recovery tank. The hot air from the first-stage recovery enters the second recovery tank for secondary waste heat recovery. Simultaneously, the cleaning fluid is introduced into the rotating tube through the water inlet pipe, diverted to the semi-circular rotating boxes, and then sprayed out from the spray holes. When the drive motor rotates the threaded rod, it simultaneously rotates the rotating tube and the semi-circular rotating boxes, causing the cleaning fluid to rotate and spray, covering the inside of the second recovery tank. This cleans impurities adhering to the inner wall and absorbs soluble harmful gases. The impurities and harmful cleaning fluid generated during cleaning are promptly discharged through the discharge pipe, achieving secondary waste heat recovery, maximizing the utilization of waste heat resources. The rotating spray design ensures thorough and uniform cleaning, reduces cleaning fluid consumption and costs, purifies harmful gases to avoid environmental pollution, ensures the cleanliness of the equipment interior, and maintains secondary recovery efficiency.

[0009] Preferably, the drying mechanism includes an annular connecting box, with jet nozzles evenly connected to the side of the annular connecting box. A venting grid plate is fixedly connected to the inner wall of the jet nozzles. The annular connecting box is fixedly connected to the inner wall of the second recovery tank. The top of the annular connecting box is connected to one end of a hot air pipe extending into the second recovery tank. After the second recovery tank is cleaned, the hot air blower is started, and hot air enters the annular connecting box through the hot air pipe, is evenly distributed to each jet nozzle, and is evenly dispersed and sprayed out through the venting grid plate, thus drying the interior of the second recovery tank from all directions and accelerating the evaporation of residual moisture. Before secondary waste heat recovery, the hot air sprayed from the jet nozzles can preheat the second recovery tank, reducing the temperature difference between the tank and the hot air, quickly removing residual moisture from the tank, preventing moisture from affecting the subsequent recovery process or damaging the equipment, ensuring stable equipment performance, and reducing heat loss during secondary recovery, further improving the overall waste heat recovery efficiency.

[0010] This invention provides a waste heat recovery and utilization device for calcining kaolin. It has the following beneficial effects: 1. The waste heat recovery and utilization equipment for calcined kaolin first heats the preheating pipe, which preheats the entire interior of the first recovery tank to a suitable temperature range. Then, the high-temperature gas generated from calcining kaolin is introduced into the tank through the inlet pipe. After entering the tank, the high-temperature gas first passes through the filter cylinder. The filter holes on the filter cylinder perform preliminary filtration of impurities in the high-temperature gas, preventing impurities from entering subsequent equipment and causing damage or affecting the recovery effect. Due to the preheating effect of the preheating pipe, heat loss caused by the large temperature difference when the high-temperature gas generated from calcining kaolin enters the first recovery tank is avoided, thereby improving the efficiency of waste heat recovery and utilization. The filtered high-temperature gas exchanges heat with the heat exchange tube in the tank. The heat exchange tube absorbs part of the heat in the high-temperature gas and transfers the heat to the first utilization box for storage and preheating utilization, thus completing the first-stage recovery process.

[0011] 2. In this waste heat recovery and utilization equipment for calcined kaolin, after prolonged use, dust and impurities accumulate on the filter holes of the primary filter cylinder on the inner wall of the first recovery tank. Failure to clean it in time will affect the heat transfer efficiency. When it is necessary to clean the filter cylinder inside the first recovery tank, the drive motor is started. The drive shaft of the drive motor rotates, causing the threaded rod to rotate. Since the threaded rod is threadedly connected to the cleaning disc, and the cleaning disc can only move up and down under the limiting action of the guide rod, the rotation of the threaded rod will cause the cleaning disc to move up and down. During the movement, the cleaning brush on the side of the cleaning disc will clean the inner wall of the filter cylinder and the filter holes, brushing off the impurities attached to the filter cylinder and inside the filter holes, preventing impurities from clogging the filter holes, thereby improving the filtration effect of the filter cylinder, avoiding the impact of filter hole blockage on the efficiency of primary heat utilization, and improving the efficiency of waste heat recovery and utilization.

[0012] 3. In this waste heat recovery and utilization equipment for calcined kaolin, after the hot gas has completed its primary utilization, it enters the second recovery tank for secondary utilization. Then, the cleaning solution is introduced into the rotating tube through the inlet pipe. Because the rotating tube and the inlet pipe are rotatably connected, the rotation of the rotating tube is not affected during the introduction of the cleaning solution. After entering the rotating tube, the cleaning solution is distributed to the semi-circular rotating boxes on both sides, and then evenly sprayed out from the spray holes on the side of the semi-circular rotating boxes. When the drive motor drives the threaded rod to rotate, the threaded rod drives the rotating tube to rotate together, and the rotating tube drives the semi-circular rotating boxes to rotate. In this way, the cleaning solution sprayed from the spray holes will cover the area inside the second recovery tank that needs to be cleaned in a rotating manner, performing a comprehensive and uniform cleaning of the inside of the second recovery tank, removing the adhering... The second recovery tank removes impurities from its inner wall and absorbs and dissolves harmful and soluble gases, further purifying the hot gas and preventing direct emissions into the atmosphere that could cause environmental pollution. This rotating spraying method also effectively reduces the amount of cleaning fluid used, improves cleaning efficiency, and lowers cleaning costs. During the cleaning process, the discharge pipe at the bottom of the second recovery tank promptly removes the removed impurities and the cleaning fluid containing dissolved harmful gases, ensuring the cleanliness of the tank's interior. Simultaneously, the second utilization box utilizes the heat from the second recovery tank, completing a secondary utilization process. This ensures that the waste heat generated from calcining kaolin is fully utilized, further guaranteeing the efficient and stable operation of the entire waste heat recovery and utilization equipment.

[0013] 4. In this waste heat recovery equipment for calcined kaolin, after the second recovery tank is cleaned, a certain amount of moisture remains inside. If not removed in time, this moisture may affect the subsequent heat recovery process or even damage the equipment. At this time, the hot air blower is started, and the hot air enters the annular connecting box through the hot air pipe. Then, the annular connecting box evenly distributes the hot air to each jet tube. The design of the venting grid plate allows the hot air to be sprayed out from the jet tube in a relatively uniform and dispersed manner, drying the inside of the second recovery tank in all directions. The hot air fully contacts the inner wall of the tank and the residual moisture, accelerating the evaporation of moisture, thereby quickly and effectively removing the moisture inside the second recovery tank. This ensures that the equipment can maintain its optimal condition during subsequent use, further improving the overall performance and stability of the waste heat recovery equipment. Moreover, before secondary utilization, the hot air sprayed from the jet tube is evenly sprayed into the second recovery tank, so that the second recovery tank receives uniform heat, thereby preheating the second recovery tank and avoiding heat loss caused by the large temperature difference between the hot air and the second recovery tank during heat recovery, thus further improving the efficiency of waste heat recovery. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the waste heat recovery and utilization equipment for calcined kaolin according to the present invention. Figure 2 This is a schematic diagram of the connection structure of the second recycling tank of the present invention; Figure 3 This is a schematic diagram of the internal structure of the second recycling tank of the present invention; Figure 4 This is a schematic diagram of the connection structure of the first recycling tank of the present invention; Figure 5 This is a schematic diagram of the internal structure of the first recycling tank of the present invention; Figure 6 This is a schematic diagram of the connection structure of the cleaning mechanism of the present invention; Figure 7 This is a schematic diagram of the connection structure of the spraying mechanism of the present invention; Figure 8 This is a schematic diagram of the connection structure of the drying mechanism of the present invention.

[0015] In the diagram: 1. Fixed base; 2. First support frame; 3. Second recovery tank; 4. Second support frame; 5. Second utilization box; 6. Support frame; 7. First recovery tank; 8. First utilization box; 9. Heat exchange tube; 10. Spraying mechanism; 11. Waste discharge pipe; 12. Drying mechanism; 13. Hot air blower; 14. Hot air pipe; 71. Tank body; 72. Air inlet pipe; 73. Preheating pipe; 74. Fixing ring; 75. Filter cylinder; 76. Filter hole; 77. Safety valve; 78. Cleaning mechanism; 781. Cleaning disc; 782. Cleaning brush; 783. Guide rod; 784. Threaded rod; 785. Drive motor; 101. Rotating tube; 102. Water inlet pipe; 103. Semi-circular rotating box; 104. Spray hole; 121. Annular connecting box; 122. Air jet tube; 123. Venting grid plate. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] For the first embodiment, please refer to... Figures 1-5This invention provides a technical solution: a waste heat recovery and utilization device for calcined kaolin, comprising a fixed base 1, a first support frame 2 fixedly connected to the top of the fixed base 1, a second recovery tank 3 fixedly connected to the top of the first support frame 2 via a bracket, a second support frame 4 fixedly connected to one side of the first support frame 2, a second utilization box 5 fixedly connected to the top of the second support frame 4, and a pipe connecting one side of the second utilization box 5 to the second recovery tank 3. Support frames 6 are fixedly connected to the top of the fixed base 1 on both sides of the first support frame 2, and a first recovery tank 7 and a first utilization box 8 are fixedly connected to the top of the support frames 6 respectively. Heat exchange pipes 9 are connected to both sides of the first recovery tank 7, with the end of the heat exchange pipe 9 away from the first recovery tank 7 connected to the first utilization box 8. The first utilization box 8 is connected to one side of the second utilization box 5 via a pipe. The first recovery tank 7 penetrates the top of the support frame 6 and connects to the top of the second recovery tank 3. A spraying mechanism 10 is rotatably connected to the bottom of the second recovery tank 3. The bottom of the second recovery tank 3 is located at the spraying mechanism 10. The side portion is connected to a waste discharge pipe 11. A drying mechanism 12 is fixedly connected to the inner wall of the second recycling tank 3. A hot air blower 13 is fixedly connected to the top of the support frame 6 via a bracket. A hot air pipe 14 is connected to one side of the hot air blower 13. The end of the hot air pipe 14 away from the hot air blower 13 passes through the top of the support frame 6 and extends into the interior of the second recycling tank 3. The portion of the hot air pipe 14 extending into the interior of the second recycling tank 3 is connected to the drying mechanism 12. The first recycling tank 7 includes a tank body 71. An air inlet pipe 72 is connected to the side of the tank body 71. A preheating pipe 73 is fixedly connected to the inner wall of tank 71. A fixing ring 74 is fixedly connected to the inner wall of tank 71. A filter cylinder 75 is fixedly connected to the inner wall of fixing ring 74. Filter holes 76 are evenly opened on the side of filter cylinder 75. Air inlet pipe 72 extends into the interior of tank 71 and communicates with filter cylinder 75. A safety valve 77 is connected to the top of tank 71. A cleaning mechanism 78 is fixedly connected to the top of inner wall of tank 71. Tank 71 passes through the top of support frame 6 and communicates with the top of second recovery tank 3. Both sides of tank 71 are connected to heat exchange pipe 9.

[0018] In operation, the preheating pipe 73 is first heated to preheat the entire interior of the first recovery tank 7, bringing the temperature to a suitable range. Then, the high-temperature gas generated from calcining kaolin is introduced into the tank 71 through the inlet pipe 72. After entering the tank 71, the high-temperature gas first passes through the filter cylinder 75. The filter holes 76 on the filter cylinder 75 perform preliminary filtration of impurities in the high-temperature gas, preventing impurities from entering subsequent equipment and causing damage or affecting the recovery effect. Due to the preheating effect of the preheating pipe 73, heat loss caused by the large temperature difference when the high-temperature gas generated from calcining kaolin enters the first recovery tank 7 is avoided, thereby improving the efficiency of waste heat recovery. The filtered high-temperature gas exchanges heat with the heat exchange pipe 9 inside the tank 71. The heat exchange pipe 9 absorbs part of the heat in the high-temperature gas and transfers the heat to the first utilization box 8 for storage and preheating, thus completing the first-stage recovery process.

[0019] For the second embodiment, please refer to... Figures 1-6 Based on the first embodiment, the present invention provides a technical solution: the cleaning mechanism 78 includes a cleaning circular plate 781, cleaning brushes 782 are uniformly fixedly connected to the side of the cleaning circular plate 781, guide rods 783 are uniformly penetrated and slidably connected to the top of the cleaning circular plate 781, threaded rods 784 are threadedly connected to the top of the cleaning circular plate 781, the drive shaft of a drive motor 785 is fixedly connected to the top of the threaded rod 784, the guide rods 783 are fixedly connected to the top of the inside of the tank 71, the drive shaft of the drive motor 785 penetrates the top of the inner wall of the tank 71 and is rotatably connected to the tank 71, the drive motor 785 is fixedly connected to the top of the tank 71, and the threaded rods 784 extend into the inside of the second recycling tank 3 and are fixedly connected to the top of the spraying mechanism 10.

[0020] During use, after prolonged use, dust and impurities accumulate on the inner wall of the filter cylinder 75 and the filter holes 76 on the filter cylinder 75. Failure to clean them in time will affect the heat transfer efficiency. When it is necessary to clean the filter cylinder 75 inside the first recovery tank 7, the drive motor 785 of the cleaning mechanism 78 is activated. The drive shaft of the drive motor 785 rotates, causing the threaded rod 784 to rotate. Since the threaded rod 784 is threadedly connected to the cleaning disc 781, and the cleaning disc 781 can only move up and down under the limiting action of the guide rod 783, the rotation of the threaded rod 784 will cause the cleaning disc 781 to move up and down. During the movement, the cleaning brush 782 on the side of the cleaning disc 781 will clean the inner wall of the filter cylinder 75 and the filter holes 76, brushing off the impurities attached to the filter cylinder 75 and inside the filter holes 76, preventing impurities from clogging the filter holes 76, thereby improving the filtration effect of the filter cylinder 75, avoiding the impact of clogging of the filter holes 76 on the efficiency of primary heat utilization, and improving the efficiency of waste heat recovery.

[0021] Third embodiment, please refer to Figures 1-7 Based on the second embodiment, the present invention provides a technical solution: the spraying mechanism 10 includes a rotating pipe 101, the bottom of the rotating pipe 101 is connected to a water inlet pipe 102, the water inlet pipe 102 is rotatably connected to the bottom of the rotating pipe 101, both sides of the rotating pipe 101 are connected to a semi-circular rotating box 103, the sides of the semi-circular rotating box 103 are evenly provided with spray holes 104, the rotating pipe 101 penetrates the bottom of the inner wall of the second recycling tank 3 and is rotatably connected to the second recycling tank 3, and the top of the rotating pipe 101 is fixedly connected to the part of the threaded rod 784 that extends into the interior of the second recycling tank 3.

[0022] In use, after the hot air has completed its primary utilization, it enters the second recovery tank 3 for secondary utilization. Then, the cleaning fluid is introduced into the rotating pipe 101 of the spraying mechanism 10 through the water inlet pipe 102. Since the rotating pipe 101 is rotatably connected to the water inlet pipe 102, the rotation of the rotating pipe 101 is not affected during the introduction of the cleaning fluid. After entering the rotating pipe 101, the cleaning fluid is diverted to the semi-circular rotating boxes 103 on both sides, and then evenly sprayed out from the spray holes 104 on the side of the semi-circular rotating boxes 103. When the drive motor 785 drives the threaded rod 784 to rotate, the threaded rod 784 drives the rotating pipe 101 to rotate together, and the rotating pipe 101 drives the semi-circular rotating boxes 103 to rotate. In this way, the cleaning fluid sprayed from the spray holes 104 will cover the area inside the second recovery tank 3 that needs cleaning in a rotating manner, thus cleaning the second recovery tank 3. The internal cleaning process is comprehensive and uniform, removing impurities adhering to the inner wall of the second recovery tank 3. It also absorbs and dissolves harmful and soluble gases within the tank, further purifying the harmful gases in the hot air and preventing direct emission into the atmosphere, thus avoiding environmental pollution. Simultaneously, this rotating spraying method effectively reduces the amount of cleaning fluid used, improves cleaning efficiency, and lowers cleaning costs. During the cleaning process, the discharge pipe 11 at the bottom of the second recovery tank 3 promptly discharges the cleaned impurities and cleaning fluid containing dissolved harmful gases, ensuring the cleanliness of the tank's interior. Meanwhile, the second utilization box 5 utilizes the heat from the second recovery tank 3, completing the secondary utilization process and ensuring that the waste heat generated from calcining kaolin is fully utilized, further guaranteeing the efficient and stable operation of the entire waste heat recovery and utilization equipment.

[0023] For the fourth embodiment, please refer to [link / reference]. Figures 1-8 Based on the third embodiment, the present invention provides a technical solution: the drying mechanism 12 includes an annular connecting box 121, the side of the annular connecting box 121 is uniformly connected with an air jet 122, the inner wall of the air jet 122 is fixedly connected with an air venting grid plate 123, the annular connecting box 121 is fixedly connected to the inner wall of the second recycling tank 3, and the top of the annular connecting box 121 is connected to one end of the hot air pipe 14 that extends into the interior of the second recycling tank 3.

[0024] During use, after the second recovery tank 3 has been cleaned, a certain amount of moisture will remain inside. If this moisture is not removed in time, it may affect the subsequent heat recovery process or even damage the equipment. At this time, the hot air blower 13 of the drying mechanism 12 is started. The hot air enters the annular connecting box 121 through the hot air pipe 14, and is then evenly distributed to each jet cylinder 122 by the annular connecting box 121. The design of the venting grid plate 123 allows the hot air to be sprayed out from the jet cylinder 122 in a relatively uniform and dispersed manner, drying the inside of the second recovery tank 3 in all directions. The hot air and the inner wall of the tank 71 and the residual moisture are dried. Sufficient contact with water accelerates evaporation, thereby quickly and effectively removing moisture from the inside of the second recovery tank 3. This ensures the equipment remains in optimal condition during subsequent use, further improving the overall performance and stability of the waste heat recovery equipment. Before secondary utilization, the hot air ejected from the jet tube 122 is evenly sprayed into the second recovery tank 3, ensuring uniform heat distribution and preheating. This prevents heat loss due to excessive temperature difference between the hot air and the second recovery tank 3 during heat recovery, further improving the efficiency of waste heat recovery.

[0025] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A waste heat recovery and utilization device for calcining kaolin, characterized in that: The system includes a fixed base (1), a first support frame (2) fixedly connected to the top of the fixed base (1), a second recycling tank (3) fixedly connected to the top of the first support frame (2) via a bracket, a second support frame (4) fixedly connected to one side of the first support frame (2), a second utilization box (5) fixedly connected to the top of the second support frame (4), and a pipe connecting one side of the second utilization box (5) to the second recycling tank (3). Support frames (6) are fixedly connected to the top of the fixed base (1) on both sides of the first support frame (2). A first recycling tank (7) and a first utilization box (8) are fixedly connected to the top of the support frames (6) respectively. Heat exchange pipes (9) are connected to both sides of the first recycling tank (7). The end of the heat exchange pipe (9) away from the first recycling tank (7) is connected to the first utilization box (8). (8) The first recycling tank (7) is connected to the top of the support frame (6) and connected to the top of the second recycling tank (3) through a pipe. The bottom of the second recycling tank (3) is connected to a spraying mechanism (10) and rotated. The bottom of the second recycling tank (3) is connected to a waste discharge pipe (11) on one side of the spraying mechanism (10). The inner wall of the second recycling tank (3) is fixedly connected to a drying mechanism (12). The top of the support frame (6) is fixedly connected to a hot air blower (13) through a bracket. The side of the hot air blower (13) is connected to a hot air pipe (14). The end of the hot air pipe (14) away from the hot air blower (13) is connected to the top of the support frame (6) and extends into the interior of the second recycling tank (3). The part of the hot air pipe (14) extending into the interior of the second recycling tank (3) is connected to the drying mechanism (12).

2. The waste heat recovery and utilization equipment for calcined kaolin as described in claim 1, characterized in that: The first recycling tank (7) includes a tank body (71), an air inlet pipe (72) connected to the side of the tank body (71), a preheating pipe (73) fixedly connected to the inner wall of the tank body (71), a fixing ring (74) fixedly connected to the inner wall of the tank body (71), a filter cylinder (75) fixedly connected to the inner wall of the fixing ring (74), filter holes (76) evenly opened on the side of the filter cylinder (75), the air inlet pipe (72) extends into the inside of the tank body (71) and communicates with the filter cylinder (75), a safety valve (77) is connected to the top of the tank body (71), and a cleaning mechanism (78) is fixedly connected to the top of the inner wall of the tank body (71).

3. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 2, characterized in that: The tank (71) extends through the top of the support frame (6) and is connected to the top of the second recovery tank (3). The two sides of the tank (71) are connected to the heat exchange tube (9).

4. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 2, characterized in that: The cleaning mechanism (78) includes a cleaning disc (781), on which cleaning brushes (782) are uniformly fixedly connected on the side. Guide rods (783) are uniformly penetrated and slidably connected to the top of the cleaning disc (781). Threaded rods (784) are threadedly connected to the top of the cleaning disc (781). The drive shaft of a drive motor (785) is fixedly connected to the top of the threaded rod (784).

5. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 4, characterized in that: The guide rod (783) is fixedly connected to the top inside the tank (71). The drive shaft of the drive motor (785) passes through the top of the inner wall of the tank (71) and is rotatably connected to the tank (71). The drive motor (785) is fixedly connected to the top of the tank (71). The threaded rod (784) extends into the second recycling tank (3) and is fixedly connected to the top of the spraying mechanism (10).

6. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 1, characterized in that: The spraying mechanism (10) includes a rotating pipe (101), the bottom of which is connected to a water inlet pipe (102). The water inlet pipe (102) is rotatably connected to the bottom of the rotating pipe (101). Both sides of the rotating pipe (101) are connected to a semi-circular rotating box (103). Spray holes (104) are evenly opened on the side of the semi-circular rotating box (103).

7. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 6, characterized in that: The rotating tube (101) penetrates the bottom of the inner wall of the second recycling tank (3) and is rotatably connected to the second recycling tank (3). The top of the rotating tube (101) is fixedly connected to the part of the threaded rod (784) that extends into the interior of the second recycling tank (3).

8. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 1, characterized in that: The drying mechanism (12) includes an annular connecting box (121), and the annular connecting box (121) is uniformly connected to the side of the air jet (122), and the inner wall of the air jet (122) is fixedly connected to the air venting grid plate (123).

9. The waste heat recovery and utilization equipment for calcining kaolin as described in claim 8, characterized in that: The annular connecting box (121) is fixedly connected to the inner wall of the second recycling tank (3), and the top of the annular connecting box (121) is connected to one end of the hot air pipe (14) extending into the second recycling tank (3).

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