Sludge dewatering and drying equipment

Abstract

The utility model provides sludge dewatering and drying equipment which comprises a reaction tank, and a heating assembly used for heating sludge and changing moisture in the sludge into water vapor is arranged in the reaction tank; a discharging pipe is arranged at the bottom of the reaction tank, one side of the reaction tank is in a closing shape, the closing opening of the reaction tank is gradually shrunk from the position far away from the discharging pipe to the position close to the discharging pipe, the discharging pipe is communicated with the interior of the reaction tank, a rotating rod is arranged on the discharging pipe in a penetrating mode, and a scraping plate and an impeller are arranged on the rotating rod in a sleeving mode. The material scraping plate comprises a material scraping unit, the shape of the material scraping unit is matched with the shape of the closed opening of the reaction tank, the material scraping unit abuts against the inner wall of the reaction tank, a side scraping plate is integrally formed on the material scraping unit, and the side scraping plate abuts against the inner wall of the discharging pipe. The utility model has the advantages that the sludge attached in the machine body can be guided out, and the discharge pipe is prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, and in particular to a sludge dewatering and drying device. Background Technology

[0002] Sludge is the substance formed during wastewater treatment after suspended solids and dissolved substances are removed from water through physical and chemical methods. This sludge typically contains a large amount of water, as well as other organic and inorganic matter. Furthermore, dehydrated and dried sludge is beneficial for resource utilization, such as as a soil conditioner, landfill cover, and energy recovery.

[0003] To facilitate the dewatering and drying of sludge, technicians have developed related dewatering and drying equipment. For example, the utility model patent with publication number CN205676342U relates to a sludge stirring and drying device, which includes a machine body, a feed inlet, and a discharge pipe disposed on the lower surface of the machine body. An infrared heating tube is installed on the inner wall of the machine body, and the infrared heating tube is connected to a heat-conducting plate and a heat-conducting rod. A rotating shaft is rotatably disposed inside the machine body near the heat-conducting rod, and a stirring blade is disposed on the rotating shaft. During drying, the sludge enters the machine body, and the moisture in the sludge is evaporated by the combined use of a steam generator and a stirrer plate. Then, the sludge is heated by the infrared heating tube and the heat-conducting rod to further evaporate the moisture in the sludge. At the same time, the stirring blade continuously stirs the sludge, accelerating the evaporation process, thereby dewatering and drying the sludge.

[0004] However, when using dewatering and drying equipment in related technologies, the dried sludge easily adheres to the inner wall of the machine and the discharge pipe. When the sludge is discharged, it causes blockage of the discharge pipe, making it difficult to discharge the remaining sludge inside the machine and affecting subsequent use. Utility Model Content

[0005] To address the problem that existing sludge discharge pipes become clogged during sludge removal, leaving residual sludge inside the machine that is difficult to discharge and affects subsequent use, this invention provides a sludge dewatering and drying device that can remove sludge adhering to the machine body and prevent clogging of the discharge pipe.

[0006] This utility model provides a sludge dewatering and drying device, which adopts the following technical solution:

[0007] A sludge dewatering and drying device includes a reaction tank, wherein the reaction tank is equipped with a heating component for heating the sludge and turning the water in the sludge into water vapor.

[0008] The bottom of the reaction vessel is provided with a discharge pipe. One side of the reaction vessel is tapered, and the tapering gradually narrows from the distance from the discharge pipe toward the discharge pipe. The discharge pipe is connected to the interior of the reaction vessel. A rotating rod passes through the discharge pipe, and a scraper and an impeller are fitted on the rotating rod. The scraper includes a scraping unit, the shape of which is adapted to the shape of the tapering of the reaction vessel. The scraping unit abuts against the inner wall of the reaction vessel. The scraping unit has an integrally formed side scraper, which abuts against the inner wall of the discharge pipe.

[0009] The above technical solution involves placing the sludge into a reaction tank during dewatering and drying. Heating is achieved by a heating element, causing water molecules in the sludge to turn into water vapor and be discharged from the tank. A drive rod rotates, causing the scraper and impeller to rotate. The scraper unit scrapes off the sludge adhering to the tank's inlet. The sludge at the inlet falls into the discharge pipe under gravity and guidance from the bottom of the tank. Simultaneously, the side scraper removes sludge from the discharge pipe, preventing blockage at the connection between the discharge pipe and the reaction tank. Furthermore, the impeller evenly pushes the dewatered and dried sludge outside the discharge pipe, preventing blockage and effectively removing sludge adhering to the inner wall of the machine and the discharge pipe. This prevents residual dewatered and dried sludge from affecting subsequent equipment use.

[0010] Preferably, the reaction vessel includes a vessel body and support legs disposed on the vessel body, the support legs being evenly distributed along the circumferential direction of the vessel body.

[0011] The above technical solution provides a stable support for the tank.

[0012] Preferably, the heating assembly includes a heating element disposed on the tank body, a heat-conducting plate abutting against the heating element, and a heat-conducting block disposed on the heat-conducting plate. The heating element is snapped into the inner wall of the tank body, the heat-conducting plate is adapted to the shape of the inner wall of the tank body, the heat-conducting plate is fixedly connected to the tank body, the heat-conducting plate abuts against the inner wall of the tank body and the heating element, and the heat-conducting block is fixedly connected to the heat-conducting plate.

[0013] Through the above technical solution, when the heating element is working, the heat generated by the heating element reaches the heat-conducting plate, which then transfers some of the heat to the heat-conducting block. This increases the heating area and further improves the efficiency of sludge heating. Furthermore, by isolating the heating element through the heat-conducting plate and block, the heating area of ​​the sludge is increased while preventing direct contact between the sludge and the heating element, thus preventing corrosion or damage to the heating element by substances within the sludge.

[0014] Preferably, the tank body is further provided with a stirring assembly, the stirring assembly including a rotating shaft passing through the tank body, a stirring blade disposed on the rotating shaft, and a first driving member connected to one end of the rotating shaft. One end of the rotating shaft extends into the tank body, and the other end extends out of the tank body. The stirring blade is located at the end of the rotating shaft that extends into the tank body, and the driving end of the first driving member is connected to the end of the rotating shaft that extends out of the tank body.

[0015] With the above technical solution, during heating, the first driving component drives the rotating shaft to rotate, which in turn drives the stirring blades to rotate. The stirring blades thoroughly stir the sludge, making the sludge heat more evenly and effectively transferring heat to the sludge. This causes the water molecules in the sludge to be converted into water vapor, effectively improving the efficiency of dehydration and drying.

[0016] Preferably, a groove is formed between two adjacent heat-conducting blocks and the heat-conducting plate. The stirring blade includes a connecting part and a scraping part. One end of the connecting part is connected to the rotating shaft. The scraping part is adapted to the groove. The scraping part slides in the groove. When the stirring blade rotates, the scraping part slides along the groove. The scraping part is provided with an inclined surface. The inclined surface is inclined outward from near the connecting part to near the scraping part.

[0017] Through the above technical solution, when the rotating shaft drives the stirring blades to rotate, the scraper slides along the groove and scrapes away the sludge adhering to the heat-conducting plate and block. Guided by the inclined surface of the scraper, the sludge is scraped away from the groove. Therefore, during heating, sludge receiving higher heat is scraped away from the groove, resulting in more uniform heating of the sludge within the tank. When dewatering and drying are complete, the scraper removes the sludge from the groove, preventing sludge residue from remaining there.

[0018] Preferably, the connecting part is further provided with a side rod.

[0019] The above technical solution allows the side rod to disrupt the flow of sludge during the mixing process, resulting in more thorough mixing of the sludge.

[0020] Preferably, the surfaces of the rotating shaft, stirring blades, and side rods are all coated with an anti-fouling coating.

[0021] The above technical solution utilizes antifouling coatings to increase the smoothness of the surfaces of the rotating shaft, mixing blades, and side rods, thereby effectively reducing sludge adhesion.

[0022] Preferably, the tank body is further provided with an exhaust assembly, which includes an exhaust pipe disposed on the tank body and an exhaust fan disposed on the exhaust pipe, the exhaust pipe being connected to the interior of the tank body.

[0023] The above technical solution utilizes the high temperature of the water vapor inside the tank. By leveraging the rising of hot air, the exhaust fan can be driven to rotate, thereby increasing airflow and accelerating the removal of hot air. Furthermore, the high-temperature water vapor is discharged to a specific safe location through the exhaust duct, which helps prevent burns to personnel or damage to equipment.

[0024] Preferably, the discharge pipe is provided with a second driving component, and the driving end of the second driving component is connected to one end of the rotating rod.

[0025] The above technical solution enables the second driving component to easily drive the rotating rod to rotate, which helps to improve work efficiency.

[0026] Preferably, the discharge pipe includes an upper pipe and a lower pipe. The upper pipe is connected to the tank body, the lower pipe is inclined, the top end of the lower pipe is connected to the upper pipe, the rotating rod passes through the upper pipe, the second driving component is located at the upper pipe, and the outlet of the lower pipe is provided with a discharge valve.

[0027] The above technical solution allows for convenient control of sludge discharge by opening or closing the discharge valve. Furthermore, the inclined lower pipe increases the discharge speed of the outlet pipe, thus compensating for the reduced discharge efficiency caused by the second drive component being installed on the upper pipe, and improving overall practicality.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. During the dewatering and drying of sludge, the sludge is introduced into the tank through the feed pipe. The heating element generates heat and transfers it to the heat-conducting plate and heat-conducting block to heat the sludge, causing the water molecules in the sludge to be converted into water vapor. The first driving element drives the rotating shaft to rotate, which in turn drives the stirring blades and side rods to rotate. The rotation of the stirring blades and side rods helps to disrupt the flow direction of the sludge during the stirring process. The scraper slides along the groove and scrapes away the sludge adhering to the heat-conducting plate and heat-conducting block. Furthermore, the inclined surface of the scraper guides the sludge away from the groove, thereby fully stirring the sludge, making the sludge heated more evenly, and effectively transferring heat to the sludge to convert the water molecules in the sludge into water vapor, effectively improving the efficiency of dewatering and drying.

[0030] 2. Water vapor is discharged through the exhaust pipe, and the rising of hot air drives the exhaust fan to rotate, increasing airflow and accelerating the discharge of hot air, thereby assisting in the discharge of water vapor.

[0031] 3. After the sludge is dried, the first drive unit continues to rotate, causing the scraper of the mixing blades to scrape the sludge located in the groove, preventing sludge residue in the groove. The sludge scraped from the groove falls to the bottom of the tank. At the same time, the second drive unit rotates, driving the rotating rod to rotate, causing the scraper and impeller to rotate. The scraper unit scrapes off the sludge attached to the bottom of the tank. The sludge at the bottom of the tank falls into the upper and lower pipes by gravity and the guidance of the bottom opening of the tank. Meanwhile, the side scraper scrapes off the sludge at the upper pipe, preventing sludge blockage at the connection between the upper pipe and the tank. Furthermore, the impeller evenly pushes the dewatered and dried sludge into the lower pipe, further reducing the risk of sludge accumulation and blockage in the upper pipe. This effectively removes the dewatered and dried sludge, as well as the sludge attached to the inner wall of the machine, the groove, and the discharge pipe, preventing the residue of dewatered and dried sludge and preventing it from affecting the subsequent use of the equipment. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0034] Figure 2 This is a cross-sectional view of the tank in an embodiment of this utility model.

[0035] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0036] Figure 4 This is a schematic diagram of the stirring assembly in an embodiment of the present invention.

[0037] Figure 5 This is a cross-sectional view of the exhaust pipe in an embodiment of this utility model.

[0038] Figure 6 This is a schematic diagram of the structure of the export component in an embodiment of this utility model.

[0039] The component designations are as follows: 1. Reaction vessel; 11. Tank body; 12. Support leg; 2. Discharge pipe; 21. Upper pipe; 22. Lower pipe; 3. Rotating rod; 4. Scraper; 41. Scraping unit; 42. Side scraper; 5. Impeller; 6. Heating element; 7. Heat-conducting plate; 8. Heat-conducting block; 9. Rotating shaft; 10. Stirring blade; 101. Connecting part; 102. Scraping part; 13. First driving component; 14. Groove; 15. Side rod; 16. Exhaust pipe; 17. Exhaust fan; 18. Second driving component; 19. Discharge valve; 20. Feed pipe. Detailed Implementation

[0040] The following will refer to the appendix in the embodiments of this utility model. Figures 1 to 6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] A sludge dewatering and drying device, referring to Figure 1 and Figure 2 The system includes a reaction tank 1, a dewatering and drying mechanism disposed within the reaction tank 1, and an outlet component. The dewatering and drying mechanism is used to dewater and dry the sludge, and the outlet component is used to assist in exporting the dewatered and dried sludge from the reaction tank 1.

[0042] Reference Figure 1 and Figure 2 The reaction vessel 1 includes a cylindrical vessel body 11 and supporting legs 12 disposed at the bottom of the vessel body 11. The vessel body 11 is vertically oriented, and its bottom is tapered, gradually narrowing from top to bottom. Multiple supporting legs 12 are provided, evenly spaced along the circumferential direction of the vessel body 11. Multiple supporting legs 12 facilitate stable support of the vessel body 11. In this embodiment, four supporting legs 12 are provided.

[0043] Continue to refer to Figure 1 and Figure 2 A circular feed pipe 20 is provided on the top side of the tank body 11, and the feed pipe 20 is connected to the interior of the tank body 11. A discharge pipe 2 is provided at the bottom of the tank body 11, and the discharge pipe 2 is also connected to the interior of the tank body 11. Thus, during sludge dewatering and drying, the sludge is introduced through the feed pipe 20, dewatered and dried by the dewatering and drying mechanism, and then discharged from the reaction tank 1 through the discharge pipe 2 with the assistance of the discharge component.

[0044] Specifically, the dewatering and drying mechanism includes a heating component for heating the sludge and turning the water in the sludge into water vapor, a stirring component for stirring the sludge, and an exhaust component for discharging the water vapor generated by the auxiliary heating from the tank 11.

[0045] Reference Figure 2 and Figure 3 The heating assembly includes a heating element 6 disposed on the tank body 11, a heat-conducting plate 7 abutting against the heating element 6, and a heat-conducting block 8 disposed on the heat-conducting plate 7. Multiple mounting slots are horizontally arranged around the inner wall of the tank body 11, and these slots are evenly spaced along the length of the tank body 11. The heating element 6 is a resistance heating plate, shaped like a ring. The heating element 6 is adapted to fit into the mounting slots, snapping into them. When the heating element 6 is snapped into the mounting slot, its inner wall is flush with the inner wall of the tank body 11. Multiple heating elements 6 are installed in the mounting slots, one-to-one, which facilitates more uniform heating inside the tank body 11 and increases heating efficiency.

[0046] Reference Figure 2 and Figure 3 The shape of the heat-conducting plate 7 is adapted to the shape of the inner wall of the tank 11. The heat-conducting plate 7 is fixedly connected to the tank 11, so that the heat-conducting plate 7 abuts against the inner wall of the tank 11 and the heating element 6. Thus, when the heating element 6 is working, the heat generated by the heating element 6 is transferred to the heat-conducting plate 7, and multiple heating elements 6 help to make the heat-conducting plate 7 more evenly heated. The heat-conducting block 8 is annular and has a square cross-section. The heat-conducting block 8 is fixedly connected to the heat-conducting plate 7, and multiple heat-conducting blocks 8 are provided. The multiple heat-conducting blocks 8 are evenly distributed along the length of the tank 11. Annular grooves 14 are formed between two adjacent heat-conducting blocks 8 and the heat-conducting plate 7. Multiple grooves 14 are formed between multiple heat-conducting blocks 8, and the multiple grooves 14 are evenly distributed along the length of the tank 11. Thus, when the heating element 6 is working, the heat generated by the heating element 6 reaches the heat-conducting plate 7, and the heat-conducting plate 7 transfers part of the heat to the heat-conducting blocks 8, which helps to increase the heating area and further increase the efficiency of sludge heating. The heating element 6 is isolated by the heat-conducting plate 7 and the heat-conducting block 8, which increases the heating area of ​​the sludge while preventing the sludge from directly contacting the heating element 6, thereby preventing the substances in the sludge from corroding or damaging the heating element 6.

[0047] Continue to refer to Figure 2 and Figure 3 When dewatering and drying sludge, the sludge is introduced into the tank 11 through the feed pipe 20. The heating element 6 heats the sludge and transfers the heat to the heat-conducting plate 7 and the heat-conducting block 8 to heat the sludge, converting the water molecules in the sludge into water vapor. The sludge is then stirred by the stirring component to ensure that the sludge is heated evenly.

[0048] Specifically, refer to Figure 2 and Figure 4 The stirring assembly includes a rotating shaft 9 passing through the tank body 11, stirring blades 10 disposed on the rotating shaft 9, and a first driving member 13 connected to one end of the rotating shaft 9. The rotating shaft 9 is distributed along the length direction of the tank body 11, with one end of the rotating shaft 9 extending into the tank body 11 and the other end extending out of the tank body 11.

[0049] Reference Figure 2 The stirring blades 10 are located at the end of the rotating shaft 9 that extends into the tank body 11. Multiple sets of stirring blades 10 are arranged corresponding to the grooves 14, with multiple stirring blades 10 in each set. These multiple stirring blades 10 are located at the same length position on the rotating shaft 9, and are evenly spaced along the circumferential direction of the rotating shaft 9. The multiple sets of stirring blades 10 are also evenly spaced along the length direction of the rotating shaft 9, and are aligned one-to-one with the multiple grooves 14. In this embodiment, each set of stirring blades 10 has two stirring blades 10, which are linearly distributed along the circumferential direction of the rotating shaft 9. Therefore, when the rotating shaft 9 is driven to rotate, multiple sets of stirring blades 10 are simultaneously driven to rotate, which is beneficial for stirring the sludge and makes the sludge heat more evenly.

[0050] Among them, reference Figure 3 and Figure 4 The stirring blade 10 includes a connecting part 101 and a scraping part 102. The connecting part 101 is long and rod-shaped, distributed along the width direction of the rotating shaft 9. One end of the connecting part 101 is connected to the rotating shaft 9. The scraping part 102 is away from the rotating shaft 9. The scraping part 102 is fan-shaped and fits into the groove 14, such that the upper and lower surfaces and the arc-shaped surface of the scraping part 102 abut against the groove wall of the groove 14. The inclined surface of the scraping part 102 is located on both sides, that is, the scraping part 102 slides into the groove 14. Thus, when the rotating shaft 9 drives the stirring blade 10 to rotate, the scraping part 102 slides along the groove 14 and scrapes away the sludge attached to the heat-conducting plate 7 and the heat-conducting block 8 (the bottom and wall of the groove 14). Guided by the inclined surface of the scraping part 102, the sludge is scraped away from the groove 14. Therefore, when heated, the sludge with higher heat will be scraped away from the groove 14, making the sludge in the tank 11 more evenly heated; when dehydration and drying are completed, the sludge located in the groove 14 is scraped away by the scraper part 102 to prevent sludge residue in the groove 14.

[0051] In addition, refer to Figure 3 and Figure 4To ensure more thorough mixing, the connecting part 101 is also equipped with side rods 15. Multiple side rods 15 are distributed along the length of the rotating shaft 9, evenly distributed on the upper and lower sides of the connecting part 101. These side rods 15 are spaced evenly along the length of the connecting part 101, with adjacent side rods arranged one above the other. The side rods 15 help to disrupt the flow direction of the sludge during mixing, resulting in more thorough mixing.

[0052] The surfaces of the rotating shaft 9, the stirring blade 10, and the side rod 15 are all coated with anti-fouling paint. In this embodiment, the anti-fouling paint is anti-fouling varnish, which is a relatively mature technology in the prior art. It will not be described in detail here. Using anti-fouling paint helps to increase the smoothness of the surfaces of the rotating shaft 9, the stirring blade 10, and the side rod 15, thereby effectively reducing the adhesion of sludge.

[0053] In this embodiment, refer to Figure 4 The first driving component 13 is a motor. The first driving component 13 is located on the top of the tank body 11. The driving end of the first driving component 13 is connected to one end of the rotating shaft 9 that extends out of the tank body 11. During stirring, the first driving component 13 drives the rotating shaft 9 to rotate, and the rotating shaft 9 drives the stirring blade 10 and the side rod 15 to rotate, thereby facilitating stirring.

[0054] During the dewatering and drying of sludge, heating is achieved through heating element 6, which transfers heat to heat-conducting plates 7 and heat-conducting blocks 8 to heat the sludge. The first driving element 13 drives the rotating shaft 9 to rotate, which in turn drives the stirring blades 10 and side rods 15. The side rods 15 help disrupt the flow of the sludge during stirring, and the scraper part 102 scrapes away the sludge adhering to the heat-conducting plates 7 and heat-conducting blocks 8. The inclined surface of the scraper part 102 guides the sludge away from the groove 14, thus thoroughly stirring the sludge and ensuring more uniform heating. Heat is effectively transferred to the sludge, converting water molecules into water vapor, effectively improving the dewatering and drying efficiency. Finally, the water vapor is discharged from the tank 11 with the assistance of the exhaust assembly.

[0055] Specifically, refer to Figure 5 The exhaust assembly includes an exhaust pipe 16 mounted on the tank body 11 and an exhaust fan 17 mounted on the exhaust pipe 16. The exhaust pipe 16 is located at the top of the tank body 11, is circular, and communicates with the interior of the tank body 11. The exhaust fan 17 is made of a high-temperature resistant material. Due to the high temperature of the water vapor inside the tank body 11, the rising of hot air drives the exhaust fan 17 to rotate, thereby increasing airflow and accelerating the exhaust of hot air. Furthermore, the high-temperature water vapor is discharged through the exhaust pipe 16 to a specific safe location, which helps prevent burns to personnel or damage to equipment.

[0056] During the dewatering and drying of sludge, the sludge is introduced into the tank 11 through the feed pipe 20. The heating element 6 generates heat, which is transferred to the heat-conducting plate 7 and the heat-conducting block 8 to heat the sludge, causing the water molecules in the sludge to be converted into water vapor. The first driving element 13 drives the rotating shaft 9 to rotate, which in turn drives the stirring blades 10 and the side rods 15 to rotate, thoroughly stirring the sludge and making the heating of the sludge more uniform. Finally, the water vapor is discharged through the exhaust pipe 16, and the rising of hot air drives the exhaust fan 17 to rotate, increasing airflow and accelerating the discharge of hot air, thus assisting in the discharge of water vapor. Finally, the dewatered and dried sludge is discharged from the discharge pipe 2 through the discharge assembly, which allows for faster heating of the sludge and discharge of moisture from the tank 11, which helps to accelerate the dewatering and drying efficiency.

[0057] Specifically, refer to Figure 2 and Figure 6 The discharge assembly includes a rotating rod 3 passing through the discharge pipe 2, a scraper 4 and an impeller 5 sleeved on the rotating rod 3, and a second drive component 18 that drives the rotating rod 3 to rotate.

[0058] Reference Figure 2 and Figure 6 The discharge pipe 2 includes an upper pipe 21 and a lower pipe 22. The upper pipe 21 is distributed along the length of the tank 11, and its top end is connected to the tank 11. The lower pipe 22 is inclined, and its top end is connected to the upper pipe 21. The inclined lower pipe 22 can increase the discharge speed of the discharge pipe 2. A discharge valve 19 is provided at the opening of the lower pipe 22. By opening or closing the discharge valve 19, the discharge of sludge can be easily controlled.

[0059] Continue to refer to Figure 2 and Figure 6 A rotating rod 3 is inserted through the bottom end of the upper pipe 21. The rotating rod 3 is distributed along the length of the tank body 11, with one end extending into the upper pipe 21 and the other end extending out of the upper pipe 21. A scraper plate 4 is sleeved on the end of the rotating rod 3 that extends into the upper pipe 21. The scraper plate 4 includes multiple scraping units 41, which are evenly distributed along the circumferential direction of the rotating rod 3. In this embodiment, two scraping units 41 are provided, and the two scraping units 41 are distributed in a straight line along the circumferential direction of the rotating rod 3. Each scraping unit 41 is a vertical arc-shaped plate. The end of the scraping unit 41 away from the rotating rod 3 extends into the tank body 11. The arc of the scraping unit 41 is adapted to the constriction at the bottom of the tank body 11, and the arc surface of the scraping unit 41 abuts against the inner wall of the constriction at the bottom of the tank body 11. By driving the rotating rod 3 to rotate, the scraper plate 4 is rotated, causing multiple scraper units 41 to scrape off the sludge attached to the bottom of the tank 11. The sludge falls into the upper pipe 21 and the lower pipe 22 under the action of gravity and the guidance of the bottom opening of the tank 11, thereby exporting the dehydrated and dried sludge.

[0060] In addition, refer to Figure 2 and Figure 6 To prevent sludge from clogging the connection between the upper pipe 21 and the tank 11, the scraping unit 41 is integrally formed with a side scraper 42. The side scraper 42 is elongated and distributed along the length of the upper pipe 21. The side scraper 42 abuts against the inner wall of the upper pipe 21, so that when the rotating rod 3 rotates, the scraping unit 41 scrapes off the sludge attached to the opening of the tank 11, and the side scraper 42 scrapes off the silt at the upper pipe 21, thereby preventing sludge from clogging the connection between the upper pipe 21 and the tank 11.

[0061] Continue to refer to Figure 2 and Figure 6 Impeller 5 is located near the lower pipe 22 and rotates with the rotating rod 3. Impeller 5 evenly pushes the dewatered and dried sludge (a mixture of lumps and powder) into the lower pipe 22, further reducing the risk of sludge accumulation and blockage in the upper pipe 21, and effectively removing sludge from the tank 11. Both impeller 5 and scraper 4 are mounted on the rotating rod 3. The second driving component 18 drives the rotating rod 3 to rotate, which synchronously drives impeller 5 and scraper 4, reducing the need for a driving source and saving energy.

[0062] In this embodiment, refer to Figure 2 and Figure 6 The second driving component 18 is located in the discharge pipe 2. The second driving component 18 is also a motor. The driving end of the second driving component 18 is connected to one end of the rotating rod 3 that extends out of the upper pipe 21.

[0063] When the dehydrated and dried sludge is discharged, the first drive unit 13 continues to rotate, causing the scraper part 102 of the stirring blade 10 to scrape the sludge located in the groove 14, preventing the sludge from remaining in the groove 14, and the sludge scraped off the groove 14 falls into the bottom of the tank 11. Simultaneously, the second driving component 18 rotates, driving the rotating rod 3 to rotate, causing the scraper 4 and impeller 5 to rotate. Multiple scraping units 41 scrape off the sludge attached to the bottom of the tank 11. The sludge at the bottom of the tank 11 falls into the upper pipe 21 and the lower pipe 22 under the influence of gravity and the guidance of the narrowed opening at the bottom of the tank 11. At the same time, the side scraper 42 scrapes off the sludge at the upper pipe 21, preventing sludge blockage at the connection between the upper pipe 21 and the tank 11. Furthermore, the impeller 5 evenly pushes the dehydrated and dried sludge into the lower pipe 22, further reducing the risk of sludge accumulation and blockage in the upper pipe 21. This effectively removes the dehydrated and dried sludge, and removes the sludge attached to the inner wall of the machine, the groove 14, the discharge pipe 2, etc., preventing the residue of dehydrated and dried sludge and preventing it from affecting the subsequent use of the equipment.

[0064] The implementation principle of this application is as follows: During the dewatering and drying treatment of sludge, the sludge is introduced into the tank 11 through the feed pipe 20. The heating element 6 heats the sludge and generates heat, which is then transferred to the heat-conducting plate 7 and the heat-conducting block 8 to heat the sludge, causing the water molecules in the sludge to be converted into water vapor. The first driving element 13 drives the rotating shaft 9 to rotate, which in turn drives the stirring blade 10 and the side rod 15 to rotate. The rotation of the stirring blade 10 and the side rod 15 helps to disrupt the flow direction of the sludge during the stirring process. The scraper part 102 slides along the groove 14 and scrapes away the sludge attached to the heat-conducting plate 7 and the heat-conducting block 8. Furthermore, the inclined surface of the scraper part 102 guides the sludge away from the groove 14, thereby fully stirring the sludge, making the sludge heat more evenly, and effectively transferring heat to the sludge to convert the water molecules in the sludge into water vapor, thus effectively improving the efficiency of dewatering and drying. Then, the water vapor is discharged through the exhaust pipe 16, and the rising of hot air causes the water vapor to drive the exhaust fan 17 to rotate, increasing airflow and accelerating the discharge of hot air, thereby assisting in the discharge of water vapor.

[0065] After the sludge is dried, the first drive unit 13 continues to rotate, causing the scraper part 102 of the stirring blade 10 to scrape the sludge located in the groove 14, preventing the sludge from remaining in the groove 14, and the sludge scraped off the groove 14 falls into the bottom of the tank 11. Simultaneously, the second driving component 18 rotates, driving the rotating rod 3 to rotate, causing the scraper 4 and impeller 5 to rotate. Multiple scraping units 41 scrape off the sludge attached to the bottom of the tank 11. The sludge at the bottom of the tank 11 falls into the upper pipe 21 and the lower pipe 22 under the influence of gravity and the guidance of the narrowed opening at the bottom of the tank 11. At the same time, the side scraper 42 scrapes off the sludge at the upper pipe 21, preventing sludge blockage at the connection between the upper pipe 21 and the tank 11. Furthermore, the impeller 5 evenly pushes the dewatered and dried sludge into the lower pipe 22, further reducing the risk of sludge accumulation and blockage in the upper pipe 21. This allows the dewatered and dried sludge to be discharged, along with the sludge attached to the inner wall of the machine, the groove 14, the discharge pipe 2, and other locations, effectively preventing the residue of dewatered and dried sludge and preventing it from affecting the subsequent use of the equipment.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A sludge dewatering and drying device, comprising a reaction tank (1), characterized in that: The reaction vessel (1) is equipped with a heating component for heating the sludge and turning the water in the sludge into water vapor. The bottom of the reaction vessel (1) is provided with a discharge pipe (2). One side of the reaction vessel (1) is tapered. The tapering of the reaction vessel (1) gradually narrows from the distance away from the discharge pipe (2) to the distance towards the discharge pipe (2). The discharge pipe (2) is connected to the inside of the reaction vessel (1). A rotating rod (3) is passed through the discharge pipe (2). A scraper (4) and an impeller (5) are sleeved on the rotating rod (3). The scraper (4) includes a scraping unit (41) and a side scraper (42) integrally formed with the scraping unit (41). The shape of the scraping unit (41) is adapted to the shape of the tapering of the reaction vessel (1). The scraping unit (41) abuts against the inner wall of the reaction vessel (1), and the side scraper (42) abuts against the inner wall of the discharge pipe (2).

2. The sludge dewatering and drying equipment according to claim 1, characterized in that: The reaction vessel (1) includes a vessel body (11) and support legs (12) disposed on the vessel body (11), the support legs (12) being evenly distributed along the circumferential direction of the vessel body (11).

3. The sludge dewatering and drying equipment according to claim 2, characterized in that: The heating assembly includes a heating element (6) disposed on the tank (11), a heat-conducting plate (7) abutting against the heating element (6), and a heat-conducting block (8) disposed on the heat-conducting plate (7). The heating element (6) is snapped into the inner wall of the tank (11). The shape of the heat-conducting plate (7) is adapted to the inner wall of the tank (11). The heat-conducting plate (7) is fixedly connected to the tank (11). The heat-conducting plate (7) abuts against the inner wall of the tank (11) and the heating element (6). The heat-conducting block (8) is fixedly connected to the heat-conducting plate (7).

4. The sludge dewatering and drying equipment according to claim 3, characterized in that: The tank (11) is also equipped with a stirring assembly, which includes a rotating shaft (9) passing through the tank (11), a stirring blade (10) disposed on the rotating shaft (9), and a first driving member (13) connected to one end of the rotating shaft (9). One end of the rotating shaft (9) extends into the tank (11), and the other end extends out of the tank (11). The stirring blade (10) is located at the end of the rotating shaft (9) that extends into the tank (11). The driving end of the first driving member (13) is connected to the end of the rotating shaft (9) that extends out of the tank (11).

5. The sludge dewatering and drying equipment according to claim 4, characterized in that: A groove (14) is formed between two adjacent heat-conducting blocks (8) and heat-conducting plate (7). The stirring blade (10) includes a connecting part (101) and a scraping part (102). One end of the connecting part (101) is connected to the rotating shaft (9). The scraping part (102) is adapted to the groove (14). The scraping part (102) slides into the groove (14). When the stirring blade (10) rotates, the scraping part (102) slides along the groove (14). The scraping part (102) is provided with an inclined surface. The inclined surface is inclined outward from near the connecting part (101) to near the scraping part (102).

6. The sludge dewatering and drying equipment according to claim 5, characterized in that: The connecting part (101) is also provided with a side rod (15).

7. The sludge dewatering and drying equipment according to claim 6, characterized in that: The surfaces of the rotating shaft (9), stirring blade (10), and side rod (15) are all coated with anti-fouling paint.

8. The sludge dewatering and drying equipment according to claim 2, characterized in that: The tank (11) is also provided with an exhaust assembly, which includes an exhaust pipe (16) disposed on the tank (11) and an exhaust fan (17) disposed on the exhaust pipe (16), and the exhaust pipe (16) is connected to the inside of the tank (11).

9. The sludge dewatering and drying equipment according to claim 1, characterized in that: The discharge pipe (2) is provided with a second driving member (18), and the driving end of the second driving member (18) is connected to one end of the rotating rod (3).

10. The sludge dewatering and drying equipment according to claim 9, characterized in that: The discharge pipe (2) includes an upper pipe (21) and a lower pipe (22). The upper pipe (21) is connected to the tank (11). The lower pipe (22) is inclined and the top end of the lower pipe (22) is connected to the upper pipe (21). The rotating rod (3) passes through the upper pipe (21). The second driving member (18) is located at the upper pipe (21). The discharge valve (19) is provided at the opening of the lower pipe (22).

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