Sludge drying waste heat utilization device

Abstract

This utility model relates to the field of waste heat utilization technology, and provides a waste heat utilization device for sludge drying. The device includes a main body, a heat exchange structure on one side of the main body, mounting brackets evenly fixed on the inner wall of the main body away from the heat exchange structure, a storage tank on one side of the main body, a temperature sensor fixed on the inner wall of the bottom of the main body, and a turbulence-inducing structure at the bottom of the main body. This utility model, by incorporating the turbulence-inducing structure, uses rotating fan blades to drive the water flow inside the tank, resulting in more uniform heat distribution, preventing localized excessively high or low water temperatures, and improving heat exchange efficiency. The temperature sensor detects the water temperature inside the tank and provides real-time temperature feedback. A microcontroller adjusts the drive motor speed to dynamically optimize the turbulence intensity, thus enabling the device to facilitate turbulence and improve heat exchange efficiency, thereby enhancing the working efficiency of the sludge drying waste heat utilization device during use.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology, and in particular to a waste heat utilization device for sludge drying. Background Technology

[0002] With the acceleration of urbanization and the increase in sewage treatment volume, sludge production has risen sharply. Sludge contains a large amount of organic matter, pathogens and heavy metals. If not handled properly, it can easily cause secondary pollution. Thermal drying can reduce the water content of sludge, significantly reduce its volume, and facilitate subsequent incineration, landfill or resource utilization. In addition, high temperature can kill pathogens and improve the stability of sludge. However, the high-temperature exhaust gas generated during the drying process will lead to waste of heat energy if directly discharged. Therefore, it is necessary to design a waste heat utilization device for sludge drying.

[0003] To this end, patent CN222481221U discloses a waste heat utilization device for sludge thermal drying, which relates to the field of sludge treatment technology. It includes a heat exchange box, a waste gas pipeline, a preheating pipeline, and a hot water exchange pipeline. The heat exchange box is a hollow structure with a hot water exchange tank on the upper side and a gas output box on the lower side. The gas output box is provided with three compartments. The waste gas pipeline and the preheating pipeline are located in the hot water exchange tank and are each connected to the compartments of the gas output box. The hot water exchange pipeline is connected to the hot water exchange tank.

[0004] This utility model makes reasonable use of the heat generated by the exhaust gas after the sludge is thermally dried;

[0005] Although the waste heat utilization device for sludge thermal drying mentioned above can exchange heat between high-temperature exhaust gas and water tank through pipelines during use, the cooling in the water tank remains stagnant for a long time during the heat exchange process, which will lead to uneven heat exchange. Therefore, it is necessary to design a waste heat utilization device for sludge drying. Utility Model Content

[0006] The purpose of this invention is to provide a waste heat utilization device for sludge drying, which solves the problem that the cooling in the water tank remains stagnant for a long time during the heat exchange process of existing waste heat utilization devices for sludge drying, which leads to uneven heat exchange.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a sludge drying waste heat utilization device, including a device body;

[0008] A heat exchange structure is provided on one side of the interior of the device body;

[0009] Mounting brackets are evenly fixed on the inner wall of the device body on the side away from the heat exchange structure.

[0010] A storage box is provided on one side of the device body. A temperature sensor is fixed on the inner wall of the bottom of the device body. A turbulence structure is provided at the bottom of the device body. The turbulence structure includes a drive shaft rotatably connected to one side of the bottom of the device body. Fan blades are fixed on the outer walls on both sides of the top of the drive shaft. The turbulence structure also includes a drive motor fixedly installed at the bottom of the device body.

[0011] Furthermore, the device body includes a box, an inner cavity, a cover, a water inlet pipe, and a drain pipe. The inner cavity is opened inside the box, and a cover is provided at the top of the box. A water inlet pipe is fixed to one side of the top of the cover, and a drain pipe is fixed to the bottom of the box near the storage box.

[0012] Furthermore, a water pump and a water tank are connected to the top of the cover, one end of the drain pipe extends into the interior of the storage tank, and a solenoid valve is installed inside the drain pipe.

[0013] Furthermore, the heat exchange structure includes a base frame fixed to the inner wall of one side of the bottom of the box, support rods evenly fixed on both sides of the top of the base frame, secondary distribution pipes provided on both sides of the support rods, heat-conducting fins evenly provided on the outer side of the secondary distribution pipes, a main distribution pipe fixed to the top of each secondary distribution pipe, a collection pipe fixed to the bottom of each secondary distribution pipe, an air inlet pipe fixed to one side of the main distribution pipe, and an air outlet pipe fixed to one side of the collection pipe.

[0014] Furthermore, one end of the air inlet pipe extends to the outside of the housing and is connected to the exhaust pipe, the secondary diversion pipes are evenly distributed inside the housing, and one end of the air outlet pipe extends to the outside of the housing and is connected to the gas processing device.

[0015] Furthermore, a microcontroller is installed inside the temperature sensor, and the output terminal of the temperature sensor and the input terminal of the drive motor are electrically connected through the microcontroller. The output terminal of the temperature sensor is also electrically connected to the input terminal of the solenoid valve inside the drain pipe.

[0016] Furthermore, the output end of the drive motor is fixedly connected to the bottom end of the drive shaft, and the fan blades are symmetrically distributed on both sides of the drive shaft.

[0017] The sludge drying waste heat utilization device provided by this utility model has the following advantages:

[0018] By incorporating a turbulence-inducing structure, the rotating fan blades drive the water flow inside the tank, forcing convection to achieve a more uniform heat distribution, preventing localized excessively high or low water temperatures, and improving heat exchange efficiency. A temperature sensor detects the water temperature inside the tank and provides real-time temperature feedback. A microcontroller adjusts the drive motor speed to dynamically optimize the turbulence intensity. When the water temperature inside the tank is sufficient, the heated water can be transported to a storage tank through a drain pipe for storage or use in other devices requiring hot water. This design enables the device to facilitate turbulence and improve heat exchange efficiency, enhancing the convenience and efficiency of the sludge drying waste heat utilization device during use.

[0019] By incorporating a heat exchange structure, the contact area between the exhaust gas and the cooling medium can be increased through the distribution pipes and heat-conducting fins, significantly improving heat exchange efficiency. This transfers the heat energy of the high-temperature exhaust gas to the water, reducing the overall energy consumption of the drying system. The evenly spaced distribution of the distribution pipes avoids local overheating or heat exchange dead zones, ensuring uniform heat transfer. The exhaust pipe connects to a gas treatment device, which deodorizes and removes dust from the exhaust gas after heat exchange, meeting emission standards. This device enables efficient recovery of the exhaust gas's heat energy, improving the working efficiency of the sludge drying waste heat utilization device during operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0023] Figure 4 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0024] Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0025] The following are the annotations in the figure: 1. Device body; 11. Box; 12. Inner cavity; 13. Cover; 14. Water inlet pipe; 15. Drain pipe; 2. Heat exchange structure; 21. Air inlet pipe; 22. Main branch pipe; 23. Secondary branch pipe; 24. Heat-conducting plate; 25. Support rod; 26. Collection pipe; 27. Air outlet pipe; 28. Base frame; 3. Mounting frame; 4. Storage box; 5. Temperature sensor; 6. Turbulence structure; 61. Drive motor; 62. Drive shaft; 63. Fan blade. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 The sludge drying waste heat utilization device provided by this utility model includes a device body 1.

[0028] Reference Figures 1-5 The device body 1 includes a housing 11, an inner cavity 12, a cover 13, a water inlet pipe 14, and a drain pipe 15. The housing 11 has an inner cavity 12. The top of the housing 11 is fitted with a cover 13. A water inlet pipe 14 is fixed to one side of the top of the cover 13. A drain pipe 15 is fixed to the bottom of the housing 11 near the storage tank 4. A water pump and a water tank are connected to the top of the cover 13. One end of the drain pipe 15 extends into the storage tank 4. A solenoid valve is installed inside the drain pipe 15. A heat exchange structure 2 is provided on one side of the device body 1. The heat exchange structure 2 includes a base frame 28 fixed to the inner wall of one side of the bottom of the housing 11. Support rods 25 are evenly fixed on both sides of the top of the 28. A secondary distribution pipe 23 is provided on both sides of the support rod 25. Heat-conducting plates 24 are evenly provided on the outer side of the secondary distribution pipe 23. A main distribution pipe 22 is fixed at the top of the secondary distribution pipe 23. A collection pipe 26 is fixed at the bottom of the secondary distribution pipe 23. An air inlet pipe 21 is fixed on one side of the main distribution pipe 22. An air outlet pipe 27 is fixed on one side of the collection pipe 26. One end of the air inlet pipe 21 extends to the outside of the box 11 and is connected to the exhaust pipe. The secondary distribution pipes 23 are evenly distributed inside the box 11. One end of the air outlet pipe 27 extends to the outside of the box 11 and is connected to the gas treatment device.

[0029] High-temperature exhaust gas enters the main distribution pipe 22 from the inlet pipe 21 and is evenly distributed to the secondary distribution pipes 23. The heat-conducting fins 24 on the outer wall of the secondary distribution pipes 23 absorb the heat of the exhaust gas inside the secondary distribution pipes 23 and conduct the heat to the cold water inside the chamber 11, where it exchanges heat with the surrounding water. The cooled exhaust gas is discharged to the processing device through the main pipe 26 and the outlet pipe 27. The heat is transferred to the water through the pipe wall, and the heated water is recycled for other processes. If preheating of the gas is required, the gas pipe to be heated can be installed at the top of the mounting bracket 3 and preheated directly by the hot water inside the chamber 11. The room temperature gas can be returned to the dryer after being heated inside the chamber 11, which improves the working efficiency of the dryer.

[0030] Reference Figures 2-5Mounting brackets 3 are evenly fixed on the inner wall of the device body 1 on the side away from the heat exchange structure 2. A storage box 4 is provided on one side of the device body 1. A temperature sensor 5 is fixed on the inner wall of the bottom of the device body 1. A microcontroller is installed inside the temperature sensor 5. The output end of the temperature sensor 5 and the input end of the drive motor 61 are electrically connected through the microcontroller. The output end of the temperature sensor 5 is electrically connected to the input end of the solenoid valve inside the drain pipe 15. A turbulence structure 6 is provided at the bottom of the device body 1. The turbulence structure 6 includes a drive shaft 62 rotatably connected to one side of the bottom of the device body 1. Fan blades 63 are fixed on the outer walls on both sides of the top of the drive shaft 62. The turbulence structure 6 also includes a drive motor 61 fixedly installed at the bottom of the device body 1. The output end of the drive motor 61 is fixedly connected to the bottom end of the drive shaft 62. The fan blades 63 are symmetrically distributed on both sides of the drive shaft 62.

[0031] When the external power supply is connected, the drive motor 61 is started. The drive motor 61 drives the drive shaft 62 to rotate, and the drive shaft 62 drives the fan blades 63 to rotate synchronously. At the bottom of the housing 11, the fan blades 63 push the water flow to form a vortex, which accelerates the diffusion of heat from the pipe wall to the water body and improves the heat exchange efficiency. The temperature sensor 5 monitors the temperature of the medium. If the temperature difference is detected to be too large, the motor speed is increased to enhance the turbulence and avoid local overheating or overcooling.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sludge drying waste heat utilization device, including the device body (1); Its features are: A heat exchange structure (2) is provided on one side inside the device body (1); Mounting brackets (3) are evenly fixed on the inner wall of the device body (1) away from the heat exchange structure (2); A storage box (4) is provided on one side of the device body (1). A temperature sensor (5) is fixed on the inner wall of the bottom of the device body (1). A turbulence structure (6) is provided at the bottom of the device body (1). The turbulence structure (6) includes a drive shaft (62) rotatably connected to one side of the bottom of the device body (1). Fan blades (63) are fixed on the outer walls on both sides of the top of the drive shaft (62). The turbulence structure (6) also includes a drive motor (61) fixedly installed at the bottom of the device body (1).

2. The sludge drying waste heat utilization device according to claim 1, characterized in that: The device body (1) includes a box (11), an inner cavity (12), a cover (13), a water inlet pipe (14), and a drain pipe (15). The inner cavity (12) is opened inside the box (11). The cover (13) is provided at the top of the box (11). The water inlet pipe (14) is fixed on one side of the top of the cover (13). The drain pipe (15) is fixed on the bottom of the box (11) near the storage box (4).

3. The sludge drying waste heat utilization device according to claim 2, characterized in that: A water pump and a water tank are connected to the top of the cover (13), and one end of the drain pipe (15) extends into the interior of the storage tank (4). A solenoid valve is installed inside the drain pipe (15).

4. The sludge drying waste heat utilization device according to claim 1, characterized in that: The heat exchange structure (2) includes a base frame (28) fixed to the inner wall of one side of the bottom of the box (11). Support rods (25) are evenly fixed on both sides of the top of the base frame (28). A secondary distribution pipe (23) is provided on both sides of the support rod (25). Heat-conducting plates (24) are evenly provided on the outer side of the secondary distribution pipe (23). A main distribution pipe (22) is fixed at the top of the secondary distribution pipe (23). A collection pipe (26) is fixed at the bottom of the secondary distribution pipe (23). An air inlet pipe (21) is fixed on one side of the main distribution pipe (22). An air outlet pipe (27) is fixed on one side of the collection pipe (26).

5. The sludge drying waste heat utilization device according to claim 4, characterized in that: One end of the intake pipe (21) extends to the outside of the housing (11) and is connected to the exhaust pipe. The diversion pipes (23) are evenly distributed inside the housing (11). One end of the exhaust pipe (27) extends to the outside of the housing (11) and is connected to the gas processing device.

6. The sludge drying waste heat utilization device according to claim 1, characterized in that: The temperature sensor (5) has a microcontroller installed inside. The output end of the temperature sensor (5) and the input end of the drive motor (61) are electrically connected through the microcontroller. The output end of the temperature sensor (5) is also electrically connected to the input end of the solenoid valve inside the drain pipe (15).

7. The sludge drying waste heat utilization device according to claim 1, characterized in that: The output end of the drive motor (61) is fixedly connected to the bottom end of the drive shaft (62), and the fan blades (63) are symmetrically distributed on both sides of the drive shaft (62).

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