Device for recovering and utilizing residual heat of regenerated sand

Abstract

The utility model provides a recycling sand waste heat recycling device relates to waste heat recycling device technical field, the utility model discloses a shell, the both ends fixedly connected with the inlet pipe and the outlet pipe of shell are provided with a plurality of bent pipes in the inside of shell, the sealing device includes the groove pole, the inner wall sliding connection of groove pole has the slide rod, the outer surface of inlet pipe is provided with sealing device, the utility model discloses a sealing device is set up, through the cavity rubber ring of telescopic and not with flue gas direct contact can be installed on the outer surface of inlet pipe, utilize the further sealing of the outside of the connecting place of circular ring and cavity rubber ring to flue gas delivery pipeline and inlet pipe, and reduce the probability that cavity rubber ring produces deformation because of being influenced by high temperature flue gas, promote the sealing effect of inlet pipe and flue gas delivery pipeline connecting place, avoid the problem that waste heat recycling device uses and happens flue gas leakage, improve the practicality of device.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery and utilization devices, and in particular to a waste heat recovery and utilization device for recycled sand. Background Technology

[0002] Used sand regeneration utilizes mechanical methods, such as heating and roasting, to remove impurities from used sand, enabling its recycling. Thermal regeneration removes impurities from used sand through heating and roasting before recycling. Mechanically regenerated sand is less stable in quality, and the resin film remaining in the pits of the sand grains affects the performance of the core sand. Conversely, thermally regenerated sand has stable quality, rounded grain morphology, and the resin film on the surface of the sand grains is completely removed, eliminating phase transformation stress in the sand grains. Therefore, thermal regeneration technology is currently the mainstream in sand processing. Furthermore, the high-temperature flue gas used to heat the used sand in the thermal sand regeneration system can be preheated with waste heat recovery equipment to preheat air or heat water and cool the flue gas.

[0003] When the waste heat recovery and utilization device is working, flue gas enters the device through the inlet pipe, and heated air or water enters the device through the feed bend. The high-temperature flue gas entering the device will come into full contact with the bend inside the device. Since there is low-temperature water or air flowing inside the bend, according to the principle of heat transfer, the heat of the high-temperature flue gas will be transferred to the medium inside the pipe through the wall of the bend. As the heat exchange continues, the temperature of the high-temperature flue gas gradually decreases. When installing the device, seals are usually installed at the inlet and outlet pipes to seal the flue gas flow pipeline. Since the seals are usually installed on the inside of the pipe, the seals on the inlet pipe side are prone to aging and damage due to the influence of high-temperature flue gas, leading to flue gas leakage and affecting the heat exchange efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of installing sealing elements at the inlet and outlet pipes of the device to seal the flue gas flow pipeline. Since the sealing elements are usually installed inside the pipe, the sealing elements on the inlet pipe side are prone to aging and damage due to the influence of high-temperature flue gas, resulting in flue gas leakage and affecting heat exchange efficiency. Therefore, a waste heat recovery and utilization device for recycled sand is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a waste heat recovery and utilization device for recycled sand, comprising a shell, with an inlet pipe and an outlet pipe fixedly connected to both ends of the shell, an inlet pipe and an outlet pipe fixedly connected to one side of the outer surface of the shell, and a plurality of bent pipes arranged inside the shell, the bent pipes penetrating the inner wall of the shell, the two ends of the bent pipes being fixedly connected to one side of the inlet pipe and one side of the outlet pipe, respectively, and a sealing device provided on the outer surface of the inlet pipe for further sealing the inlet pipe and the outside of the flue gas conveying pipeline.

[0006] The effects achieved by the above components are as follows: When using the waste heat recovery and utilization device, the boiler flue gas conveying pipe for heating the old sand in the old sand thermal regeneration system is connected to one end of the inlet pipe through a flange, the low-temperature flue gas receiving pipe is connected to the outlet pipe through a flange, the material conveying pipe (which can be water or air) is connected to one end of the feed pipe through a flange, and the material receiving pipe is connected to one end of the outlet pipe through a flange. The high-temperature flue gas enters the interior of the shell through the inlet pipe, and the material enters the inside of the bend through the feed pipe and flows inside the bend. The heat of the high-temperature flue gas is transferred to the medium inside the pipe through the wall of the bend. As the heat exchange continues, the temperature of the high-temperature flue gas gradually decreases. After being heated, the material enters the outlet pipe through the bend and is output, while the low-temperature flue gas is discharged through the outlet pipe.

[0007] Preferably, the sealing device includes a grooved rod, one end of which is fixedly connected to the outer surface of the housing near the smoke inlet pipe by bolts. A sliding rod is slidably connected to the inner wall of the grooved rod. A ring is fixedly connected to the end of the sliding rod away from the grooved rod. A hollow rubber ring is fixedly connected to one side of the ring. A circular groove is provided inside the hollow rubber ring. Several L-shaped rods are fixedly connected to the outer surface of the ring. Several round rods are slidably connected to the inner wall of the hollow rubber ring. An arc-shaped rod is fixedly connected to one end of each round rod. The arc-shaped rods are circumferentially distributed inside the hollow rubber ring. The end of the round rod away from the arc-shaped rod slides on one end of the inner wall of the L-shaped rod. A spring is provided on the outer surface of the round rod. The two ends of the spring are fixedly connected to one side of the round rod and one side of the L-shaped rod, respectively.

[0008] The effect achieved by the above-mentioned components is as follows: By setting the cavity rubber ring, when installing the waste heat recovery and utilization device, one end of the groove rod is brought closer to the shell at the outer surface of the flue pipe, so that the ring at one end of the slide rod is fitted onto the outer surface of the flue pipe. When the cavity rubber ring is close to the flue pipe, each of the round rods on the outer surface of the ring is pulled to control the round rods to move away from the ring. The ring pulls the arc-shaped rod located inside the cavity rubber ring away from the bottom end of the inner wall of the cavity rubber ring and compresses the spring located below the L-shaped rod. Then, the cavity rubber ring is pushed towards the flue pipe, so that the inner surface of the cavity rubber ring is compressed and deformed into the outer side of the flue pipe, and the groove rod continues to be pushed. The movement causes one end of the grooved rod to fit against the outer surface of the housing. The grooved rod is then fixed to the housing with bolts. Subsequently, the flue gas conveying pipe and the inlet pipe are connected at one end via a flange. After the connection is completed, the sliding rod is pushed to move away from the grooved rod, allowing the hollow rubber ring to enter the other side of the flange at one end of the flue gas conveying pipe. At this time, the compressed spring below the L-shaped rod returns to its original state and pushes the round rod towards the hollow rubber ring. The arc-shaped rod expands the inner ring of the hollow rubber ring outward, and the inner ring surface of the hollow rubber ring presses against the outer surface of the flue gas conveying pipe. The round ring and the hollow rubber ring further seal the outside of the connection between the flue gas conveying pipe and the inlet pipe.

[0009] Preferably, the outer surfaces of the inner ring of the hollow rubber ring are arc-shaped on both sides.

[0010] The effect achieved by the above components is that by setting the outer edges of the inner ring of the cavity rubber ring to be arc-shaped, it is easier to compress the cavity rubber ring and cause it to shrink when pushing the cavity rubber ring into the outer surface of the flange at one end of the flue pipe.

[0011] Preferably, a screw is fixedly connected to one side of the slide rod, and a threaded ring is threaded to the outer surface of the screw, which slides on one side of the inner wall of the groove rod.

[0012] The effect achieved by the above components is as follows: when installing the sealing device, after the position of the cavity rubber ring and the slide rod is moved, the threaded ring on the outer surface of the screw can be rotated to move the threaded ring in the direction of the groove rod on the outer surface of the screw, pressing one side of the threaded ring against the outer surface of the groove rod, further fixing the position of the slide rod inside the groove rod and the position of the cavity rubber ring, and improving the stability of the sealing device after installation.

[0013] Preferably, two support rods are fixedly connected to the outer surface of the round rod, the two support rods are at a certain angle to the round rod, and the ends of the two support rods away from the round rod are fixedly connected to the outer surface of the arc-shaped rod.

[0014] The effect achieved by the above components is that by setting up support rods, the outer structure at the connection between the round rod and the arc rod can be further reinforced, preventing the connection between the arc rod and the round rod from breaking when the bottom end of the arc rod is pushed and squeezed.

[0015] Preferably, an auxiliary block is fixedly connected to the end of the round rod away from the arc-shaped rod, and the outer surface of the auxiliary block is arc-shaped.

[0016] The effect achieved by the above components is that by hooking the auxiliary block at one end of the round rod with a hand hook, it is easier to pull the auxiliary block to control the movement of the round rod and the arc rod, thus improving the convenience of installing the sealing device.

[0017] Preferably, the end of the round rod away from the arc-shaped rod is rotatably connected to a rotating shaft, and one end of the rotating shaft is fixedly connected to a stop block.

[0018] The effect achieved by the above components is as follows: when the round rod is pulled to control the movement of the arc rod and compress the spring, it can push the rotating shaft and the stop block at one end of the round rod to rotate, so that the stop block is attached to the side of the L-shaped rod away from the ring, temporarily fixing the position of the round rod on the side of the L-shaped rod and the position of the arc rod inside the cavity rubber ring, making it easier to move the cavity rubber ring into the outer surface of the smoke inlet pipe.

[0019] Preferably, T-shaped blocks are fixedly connected to the upper and lower ends of the slide rod, and the two T-shaped blocks slide on the upper and lower sides of the inner wall of the groove rod, respectively.

[0020] The effect achieved by the above components is that by setting the T-block, the angle between the slide bar and the groove bar can be further restricted, preventing the angle between the end of the slide bar away from the groove bar and the groove bar from deviating.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, a sealing device is installed. A retractable, non-contacting hollow rubber ring is mounted on the outer surface of the flue gas inlet pipe. After the flue gas conveying pipe is connected to the flue gas inlet pipe, the inner surface of the hollow rubber ring is moved to press against the outer surface of the flue gas conveying pipe. The ring and the hollow rubber ring further seal the outer side of the connection between the flue gas conveying pipe and the flue gas inlet pipe, reducing the probability of deformation of the hollow rubber ring due to high-temperature flue gas. This improves the sealing effect at the connection between the flue gas inlet pipe and the flue gas conveying pipe, avoids flue gas leakage during the use of the waste heat recovery device, and enhances the practicality of the device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the hollow rubber ring of this utility model;

[0025] Figure 3 This utility model Figure 2 A magnified three-dimensional structural diagram of point A;

[0026] Figure 4 This is a three-dimensional structural diagram of the grooved rod of this utility model;

[0027] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the hollow rubber ring of this utility model.

[0028] Legend: 1. Shell; 2. Sealing device; 21. Groove rod; 22. Slide rod; 23. Ring; 24. Screw; 25. Threaded ring; 26. Hollow rubber ring; 27. Round rod; 28. L-shaped rod; 29. ​​Spring; 210. Arc rod; 211. Support rod; 212. Auxiliary block; 213. Rotating shaft; 214. Stop block; 215. T-shaped block; 3. Smoke inlet pipe; 4. Smoke outlet pipe; 5. Feed pipe; 6. Bend pipe; 7. Discharge pipe. Detailed Implementation

[0029] Example 1, as Figure 1-2As shown, the waste heat recovery and utilization device for recycled sand includes a shell 1. An inlet pipe 3 and an outlet pipe 4 are fixedly connected to both ends of the shell 1. An inlet pipe 5 and an outlet pipe 7 are fixedly connected to one side of the outer surface of the shell 1. Several bent pipes 6 are installed inside the shell 1, penetrating the inner wall of the shell 1. The two ends of the bent pipes 6 are fixedly connected to one side of the inlet pipe 5 and one side of the outlet pipe 7, respectively. A sealing device 2 is installed on the outer surface of the inlet pipe 3 to further seal the inlet pipe 3 and the outside of the flue gas conveying pipeline. When using the waste heat recovery and utilization device, the boiler flue gas conveying pipeline for heating the old sand in the old sand thermal regeneration system is connected to the inlet pipe 3... One end is connected by a flange. The low-temperature flue gas receiving pipe and the flue gas outlet pipe 4 are connected by a flange. The material (which can be water or air) conveying pipe and the feed pipe 5 are connected by a flange. The material receiving pipe and the discharge pipe 7 are connected by a flange. The high-temperature flue gas enters the interior of the shell 1 through the flue gas inlet pipe 3. The material enters the interior of the bend pipe 6 through the feed pipe 5 and flows inside the bend pipe 6. The heat of the high-temperature flue gas is transferred to the medium inside the pipe through the wall of the bend pipe 6. As the heat exchange continues, the temperature of the high-temperature flue gas gradually decreases. After being heated, the material enters the discharge pipe 7 through the bend pipe 6 and is discharged. The low-temperature flue gas is discharged through the flue gas outlet pipe 4.

[0030] Reference Figure 1-5As shown, in this embodiment: the sealing device 2 includes a grooved rod 21. One end of the grooved rod 21 is fixedly connected to the outer surface of the housing 1 near the smoke inlet pipe 3 by bolts. A sliding rod 22 is slidably connected to the inner wall of the grooved rod 21. A circular ring 23 is fixedly connected to the end of the sliding rod 22 away from the grooved rod 21. A hollow rubber ring 26 is fixedly connected to one side of the circular ring 23. A circular groove is provided inside the hollow rubber ring 26. Several L-shaped rods 28 are fixedly connected to the outer surface of the circular ring 23. Several round rods 27 are slidably connected to the inner wall of the hollow rubber ring 26. An arc-shaped rod 210 is fixedly connected to one end of the round rod 27. The arc-shaped rods 210 are circumferentially distributed inside the hollow rubber ring 26. The end of the round rod 27 away from the arc-shaped rod 210 slides on one end of the inner wall of the L-shaped rod 28. A spring 29 is provided on the outer surface of the device. The two ends of the spring 29 are fixedly connected to one side of the round rod 27 and one side of the L-shaped rod 28, respectively. By setting a hollow rubber ring 26, when installing the waste heat recovery device, one end of the grooved rod 21 is brought closer to the housing 1 at the outer surface of the flue pipe 3, so that the ring 23 at one end of the slide rod 22 is fitted onto the outer surface of the flue pipe 3. When the hollow rubber ring 26 is close to the flue pipe 3, the round rods 27 on the outer surface of the ring 23 are pulled to control the round rods 27 to move away from the ring 23. The ring 23 pulls the arc-shaped rod 210 located inside the hollow rubber ring 26 away from the bottom end of the inner wall of the hollow rubber ring 26 and compresses the spring 29 located below the L-shaped rod 28. Then, the hollow rubber ring 26 is pushed towards the flue pipe 3. The inner surface of the hollow rubber ring 26 is compressed and deformed, entering the outer side of the flue gas inlet pipe 3. The groove rod 21 is then pushed to move, causing one end of the groove rod 21 to adhere to the outer surface of the housing 1. The groove rod 21 is then fixed to the housing 1 using bolts. Subsequently, the flue gas conveying pipe is connected to one end of the flue gas inlet pipe 3 via a flange. After connection, the slide rod 22 is pushed to move away from the groove rod 21, causing the hollow rubber ring 26 to enter the other side of the flange at one end of the flue gas conveying pipe. At this time, the compressed spring 29 below the L-shaped rod 28 returns to its original state, pushing the round rod 27 towards the hollow rubber ring 26. The arc-shaped rod 210 then pushes the inner ring of the hollow rubber ring 26 outwards, causing the inner surface of the hollow rubber ring 26 to press against the outer surface of the flue gas conveying pipe. The connection between the flue gas conveying pipe and the inlet pipe 3 is further sealed by a circular ring 23 and a hollow rubber ring 26. By installing a sealing device 2, a retractable hollow rubber ring 26 that does not directly contact the flue gas is installed on the outer surface of the inlet pipe 3. After the flue gas conveying pipe is connected to the inlet pipe 3, the inner surface of the hollow rubber ring 26 is moved to press against the outer surface of the flue gas conveying pipe. This further seals the connection between the flue gas conveying pipe and the inlet pipe 3 using the circular ring 23 and the hollow rubber ring 26, reducing the probability of deformation of the hollow rubber ring 26 due to high-temperature flue gas, improving the sealing effect at the connection between the inlet pipe 3 and the flue gas conveying pipe, and preventing flue gas leakage during the use of the waste heat recovery device.Improving the practicality of the lifting device.

[0031] Reference Figure 2-5 As shown in this embodiment: the outer surfaces of the inner ring of the cavity rubber ring 26 are arc-shaped. By setting the outer surfaces of the inner ring of the cavity rubber ring 26 to be arc-shaped, it is easier to compress the cavity rubber ring 26 and cause it to shrink when it is pushed into the outer surface of the flange at one end of the smoke inlet pipe 3. A screw 24 is fixedly connected to one side of the slide rod 22. A threaded ring 25 is threadedly connected to the outer surface of the screw 24. The screw 24 slides on one side of the inner wall of the groove rod 21. When installing the sealing device 2, after the positions of the cavity rubber ring 26 and the slide rod 22 have been moved, the threaded ring 25 on the outer surface of the screw 24 can be rotated to move the threaded ring 25 in the direction of the outer surface of the screw 24 towards the groove rod 21, pressing one side of the threaded ring 25 against the outer surface of the groove rod 21, further fixing the position of the slide rod 22 inside the groove rod 21 and the position of the cavity rubber ring 26, and improving the stability of the sealing device 2 after installation.

[0032] Reference Figure 2-5 As shown in this embodiment: Two support rods 211 are fixedly connected to the outer surface of the round rod 27. The two support rods 211 form a certain angle with the round rod 27. The ends of the two support rods 211 away from the round rod 27 are fixedly connected to the outer surface of the arc-shaped rod 210. By setting the support rods 211, the outer structure of the connection between the round rod 27 and the arc-shaped rod 210 can be further reinforced, preventing the connection between the arc-shaped rod 210 and the round rod 27 from breaking when the bottom end of the arc-shaped rod 210 is pushed and squeezed. An auxiliary block 212 is fixedly connected to the end of the round rod 27 away from the arc-shaped rod 210. The outer surface of the auxiliary block 212 is arc-shaped. By hooking the arc-shaped auxiliary block 212 at one end of the round rod 27, it is easier to pull the auxiliary block 212 to control the movement of the round rod 27 and the arc-shaped rod 210, improving the convenience of installing the sealing device 2. The end of the round rod 27 away from the arc-shaped rod 210 can rotate. A rotating shaft 213 is connected, and a stop block 214 is fixedly connected to one end of the rotating shaft 213. When the round rod 27 is pulled to control the movement of the arc rod 210 and compress the spring 29, the rotating shaft 213 and the stop block 214 at one end of the round rod 27 can be pushed to rotate, so that the stop block 214 fits against the side of the L-shaped rod 28 away from the ring 23. The position of the round rod 27 on the side of the L-shaped rod 28 and the position of the arc rod 210 inside the cavity rubber ring 26 are temporarily fixed, so as to facilitate the movement of the cavity rubber ring 26 into the outer surface of the smoke inlet pipe 3. T-shaped blocks 215 are fixedly connected to the upper and lower ends of the slide rod 22 respectively. The two T-shaped blocks 215 slide on the upper and lower sides of the inner wall of the groove rod 21 respectively. By setting the T-shaped blocks 215, the angle between the slide rod 22 and the groove rod 21 can be further restricted, so as to prevent the angle between the end of the slide rod 22 away from the groove rod 21 and the groove rod 21 from being skewed.

[0033] Working principle: When using the waste heat recovery and utilization device, before connecting the boiler flue gas conveying pipe for heating the old sand in the old sand thermal regeneration system to one end of the flue gas inlet pipe 3, one end of the grooved rod 21 is brought closer to the housing 1 on the outer surface of the flue gas inlet pipe 3, so that the ring 23 at one end of the sliding rod 22 is fitted onto the outer surface of the flue gas inlet pipe 3. When the hollow rubber ring 26 is close to the flue gas inlet pipe 3, each of the round rods 27 on the outer surface of the ring 23 is pulled to control the round rods 27 to move away from the ring 23. The ring 23 pulls the internal components located inside the hollow rubber ring 26. The arc-shaped rod 210 moves away from the bottom of the inner wall of the hollow rubber ring 26 and compresses the spring 29 located below the L-shaped rod 28. Then, it pushes the hollow rubber ring 26 towards the smoke inlet pipe 3, causing the inner surface of the hollow rubber ring 26 to be deformed and enter the outer side of the smoke inlet pipe 3. It continues to push the grooved rod 21 to move so that one end of the grooved rod 21 fits against the outer surface of the housing 1. The grooved rod 21 is fixed to the housing 1 with bolts. Then, the flue gas conveying pipe is connected to one end of the smoke inlet pipe 3 through a flange. After the connection is completed, the slide rod 22 is pushed to control the slide rod 22. Moving away from the grooved rod 21, the hollow rubber ring 26 enters the other side of the flange at one end of the flue gas conveying pipe. At this time, the compressed spring 29 below the L-shaped rod 28 returns to its original state and pushes the round rod 27 towards the hollow rubber ring 26. The arc rod 210 pushes the inner ring of the hollow rubber ring 26 outward, and the inner ring surface of the hollow rubber ring 26 abuts against the outer surface of the flue gas conveying pipe. The round ring 23 and the hollow rubber ring 26 further seal the outside of the connection between the flue gas conveying pipe and the inlet pipe 3. Subsequently, the low-temperature flue gas receiving pipe... The material conveying pipe is connected to the exhaust pipe 4 via a flange, and the material receiving pipe is connected to the discharge pipe 7 via a flange. High-temperature flue gas enters the interior of the shell 1 through the exhaust pipe 3, and the material enters the bend 6 through the feed pipe 5 and flows inside the bend 6. The heat of the high-temperature flue gas is transferred to the medium inside the pipe through the wall of the bend 6. As the heat exchange continues, the temperature of the high-temperature flue gas gradually decreases. After being heated, the material enters the discharge pipe 7 through the bend 6 and is discharged. Low-temperature flue gas is discharged through the exhaust pipe 4.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A waste heat recovery and utilization device for recycled sand, comprising a shell (1), characterized in that: The two ends of the housing (1) are respectively fixedly connected to the inlet pipe (3) and the outlet pipe (4). The outer surface of the housing (1) is fixedly connected to the feed pipe (5) and the outlet pipe (7). The inside of the housing (1) is provided with several bends (6). The bends (6) penetrate the inner wall of the housing (1). The two ends of the bends (6) are respectively fixedly connected to one side of the feed pipe (5) and one side of the outlet pipe (7). The outer surface of the inlet pipe (3) is provided with a sealing device (2) that can further seal the inlet pipe (3) and the outside of the flue gas conveying pipe.

2. The waste heat recovery and utilization device for recycled sand according to claim 1, characterized in that: The sealing device (2) includes a groove rod (21). One end of the groove rod (21) is fixedly connected to the outer surface of the housing (1) near the smoke inlet pipe (3) by bolts. A slide rod (22) is slidably connected to the inner wall of the groove rod (21). A ring (23) is fixedly connected to the end of the slide rod (22) away from the groove rod (21). A hollow rubber ring (26) is fixedly connected to one side of the ring (23). A circular groove is provided inside the hollow rubber ring (26). Several L-shaped rods are fixedly connected to the circumference of the outer surface of the ring (23). (28) Several round rods (27) are slidably connected to the inner wall of the hollow rubber ring (26). One end of the round rod (27) is fixedly connected to an arc rod (210). The arc rods (210) are distributed in a circle inside the hollow rubber ring (26). The end of the round rod (27) away from the arc rod (210) slides on one end of the inner wall of the L-shaped rod (28). A spring (29) is provided on the outer surface of the round rod (27). The two ends of the spring (29) are fixedly connected to one side of the round rod (27) and one side of the L-shaped rod (28), respectively.

3. The waste heat recovery and utilization device for recycled sand according to claim 2, characterized in that: The inner outer surface of the hollow rubber ring (26) is arc-shaped on both sides.

4. The waste heat recovery and utilization device for recycled sand according to claim 3, characterized in that: A screw (24) is fixedly connected to one side of the slide rod (22), and a threaded ring (25) is threadedly connected to the outer surface of the screw (24). The screw (24) slides on one side of the inner wall of the groove rod (21).

5. The waste heat recovery and utilization device for recycled sand according to claim 4, characterized in that: Two support rods (211) are fixedly connected to the outer surface of the round rod (27). The two support rods (211) form a certain angle with the round rod (27). The ends of the two support rods (211) away from the round rod (27) are fixedly connected to the outer surface of the arc rod (210).

6. The waste heat recovery and utilization device for recycled sand according to claim 5, characterized in that: An auxiliary block (212) is fixedly connected to one end of the round rod (27) away from the arc rod (210), and the outer surface of the auxiliary block (212) is arc-shaped.

7. The waste heat recovery and utilization device for recycled sand according to claim 6, characterized in that: The end of the round rod (27) away from the arc rod (210) is rotatably connected to a rotating shaft (213), and a stop block (214) is fixedly connected to one end of the rotating shaft (213).

8. The waste heat recovery and utilization device for recycled sand according to claim 7, characterized in that: The upper and lower ends of the slide rod (22) are respectively fixedly connected to T-shaped blocks (215), and the two T-shaped blocks (215) slide on the upper and lower sides of the inner wall of the groove rod (21).

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