Sludge drying treatment device

Abstract

This utility model discloses a sludge drying device, mainly relating to the field of sludge drying technology. It includes a hood and a machine body arranged vertically, with a perforated partition installed between the hood and the machine body. One end of the hood has a feed inlet, and the end of the hood near the feed inlet has an auxiliary mechanism. The auxiliary mechanism includes a horizontal axis extending horizontally along the width of the hood, consisting of several axes equidistant from the length of the hood. The horizontal axis has a rotating action, and multiple swing rods perpendicularly arranged on the horizontal axis are provided. The end of each swing rod away from the horizontal axis has a hanging rod parallel to the horizontal axis, with a sleeve fitted onto the hanging rod and a scraper on the sleeve. The beneficial effects of this utility model are: it effectively solves the problems of sludge adhesion, poor feeding, and uneven drying in the initial stage of existing fluidized bed drying technology, improving the efficiency and uniformity of sludge drying.

Description

Technical Field

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

[0002] Fluidized bed drying technology has been widely used in sludge treatment, especially in sludge reduction and fuel production. Convection fluidized bed drying technology, with its advantages of high single-unit evaporation intensity, small footprint, and suitability for continuous operation, can dry dewatered sludge with a moisture content as high as 80% to below 10% in a single pass, demonstrating significant efficiency and practicality. However, existing technologies still face some problems in practical applications. One problem is material accumulation at the fluidized bed feed inlet. Due to the high moisture content and viscosity of sludge, it easily accumulates at the feed inlet, leading to poor feeding and affecting drying efficiency. This not only hinders the effective movement of sludge, affecting the continuity and efficiency of the entire drying process, but may also cause uneven drying, thus affecting the quality of the final product. Furthermore, adhered sludge may gradually accumulate over time, increasing equipment maintenance costs and cleaning difficulty. These problems, to some extent, limit the further development and application of fluidized bed drying technology in the sludge treatment field. Utility Model Content

[0003] The purpose of this invention is to provide a sludge drying device that effectively solves the problems of sludge adhesion, poor feeding, and uneven drying in the initial stage of existing fluidized bed drying technology, thereby improving the efficiency and uniformity of sludge drying.

[0004] To achieve the above objectives, this utility model employs the following technical solution: A sludge drying and treatment device includes a cover and a body arranged vertically. A partition with a mesh is installed between the cover and the body. One end of the cover is provided with a feed inlet. An auxiliary mechanism is provided at the end of the cover near the feed inlet. The auxiliary mechanism includes a horizontal shaft extending horizontally along the width direction of the cover. Several horizontal shafts are arranged equidistantly relative to the length direction of the cover. The horizontal shafts have a rotational movement. Multiple swing rods are provided on the horizontal shafts and are arranged perpendicularly to them. A hanging rod parallel to the horizontal shaft is provided at the end of the swing rod away from the horizontal shaft. A hanging sleeve is sleeved on the hanging rod, and a scraper is provided on the hanging sleeve.

[0005] There is a gap between the hanging sleeve and the hanging rod.

[0006] Multiple sets of bushings are provided on the horizontal axis, with two bushings in each set. One end of the swing rod is fixed to the bushing, and the hanging rods of the two bushings in the same set extend relative to each other and are coaxially aligned.

[0007] The bushing is slidably connected to the horizontal shaft, and a fastening screw threaded through the side wall of the bushing is threaded to it, with the inner end of the fastening screw in contact with the horizontal shaft.

[0008] The scrapers on adjacent horizontal axes are staggered.

[0009] The hanging sleeve has a horizontal through-hole in the shape of an oblong shape. The two ends of the oblong shape are semi-circular and the diameter is larger than the diameter of the hanging rod. The length of the oblong shape is not less than twice its width. The hanging rod is set inside the oblong shape.

[0010] The scraper arches in the middle towards the feed inlet, and has triangular teeth at both ends pointing away from the feed inlet. The scraper has a scraping side on its bottom side, which forms an arc-shaped arrow based on the arching of the scraper.

[0011] Both ends of the horizontal shaft are rotatably connected to the inner wall of the cover via bearing components. One end of the horizontal shaft is provided with a transmission sprocket, and a transmission chain is wound on the transmission sprocket. One end of one horizontal shaft passes through the cover and its exposed end is keyed to a driven sprocket. A drive motor is fixed outside the cover. The output shaft of the drive motor is equipped with a driving sprocket via a reducer. The driving sprocket and the driven sprocket are driven by a chain.

[0012] The bottom of the machine body is provided with a shock-absorbing structure, a vibration motor is installed on the machine body, an airflow inlet is provided on the machine body, multiple air boxes are provided along its length inside the machine body, the airflow inlet is provided for each air box, multiple suction ports are provided on the top of the cover, and a discharge port is provided at the end of the cover away from the feed port.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This device dries sludge using fluidized bed technology. An auxiliary mechanism effectively pushes the sludge and scrapes the surface of the baffles, preventing sludge adhesion and separating and breaking down sludge clumps, promoting uniform dispersion. This design ensures uniform movement of the sludge within the fluidized bed, improving drying uniformity and efficiency. It effectively solves problems such as sludge adhesion, poor feeding, and uneven drying found in existing fluidized bed drying technologies, further improving drying efficiency and uniformity, reducing energy consumption, and enhancing equipment stability and reliability. This provides a more efficient and reliable solution for sludge reduction and resource recovery. Attached Figure Description

[0014] Figure 1 This is a schematic diagram showing the components of this utility model disassembled.

[0015] Figure 2 This is a bottom view diagram of the cover of this utility model near the feed inlet.

[0016] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the auxiliary mechanism of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of a component on a horizontal axis of this utility model.

[0019] Figure 6 This is a schematic diagram of the scraper's state when the swing rod swings at the bottom.

[0020] Figure 7 This is a schematic diagram of the overall design of this utility model.

[0021] The labels shown in the attached diagram: 1. Cover; 2. Machine body; 3. Vibration motor; 4. Partition plate; 5. Air box; 6. Airflow inlet; 7. Suction port; 8. Feed inlet; 9. Discharge port; 10. Horizontal shaft; 11. Driven sprocket; 12. Transmission sprocket; 13. Bushing; 14. Fastening screw; 15. Swing rod; 16. Hanging rod; 17. Hanging sleeve; 18. Waist-shaped hole; 19. Scraper; 20. Tooth tip; 21. Scraper side. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0023] Unless otherwise specified, the instruments, reagents, and materials used in the following embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods used in the following embodiments are all conventional experimental methods and detection methods already available in the prior art.

[0024] Example:

[0025] Sludge drying equipment is essentially an improvement on fluidized bed drying. Fluidized bed drying (commonly known as "one-step drying") has been successfully applied in sludge reduction and fuel production. Convection fluidized beds (where hot air or waste gas passes directly through the bed) can dry dewatered sludge with a moisture content of 80% to below 10% in one go. Each unit has high evaporation intensity, small footprint, and is suitable for continuous operation.

[0026] This fluidized bed system is based on the existing structure, with improvements mainly focused on the feeding section. The main structure of the device includes a cover 1 and a body 2 that fit together with the upper and lower parts.

[0027] The bottom of the machine body 2 is fixed to the base by shock-absorbing springs, which buffers and provides elastic support for the vibration of the whole machine.

[0028] A vibration motor 3 is installed on one side of the machine body 2 to provide power for the vibration of the machine body 2 and realize high-frequency vibration.

[0029] The top side of the body 2 is provided with a lower opening, and the bottom side of the cover 1 is provided with an upper opening. The upper opening and the lower opening are fastened together to form a sealed fluid duct structure.

[0030] A partition 4 is provided between the lower opening and the upper opening. The partition 4 has mesh holes for heating the sludge by passing hot air. The mesh holes allow the circulating gas to pass evenly upward through the fluidized bed, forming a fluidized state and ensuring that the sludge particles are uniformly suspended and mixed in the bed.

[0031] The unit contains multiple parallel air boxes 5 arranged along its length, which facilitates the even distribution of circulating gas to different areas of the fluidized bed. Air inlets 6 are located on the side wall of the unit 2 corresponding to the air boxes 5. These air inlets 6 are connected to gas pipelines to evenly deliver circulating gas into the fluidized bed, providing power for the fluidization of sludge. The air inlets 6 are connected to a hot air source via gas pipelines. The hot air source can be heat obtained by a blower and a heater. The heater can use electrical or combustion energy, or, depending on the plant location, can be combined with industrial waste heat recovery, such as a waste heat boiler.

[0032] The hood 1 is located at the top of the fluidized bed, and the top of the hood 1 is provided with multiple suction ports 7. The suction ports 7 are used to extract airflow and complete airflow circulation. The hood 1 is connected to a cyclone separator. Through suction, the dry sludge particles are separated from the circulating gas, while the fine sludge particles and water vapor in the circulating gas are carried into the gas-solid separation device for further processing.

[0033] One end of the cover 1 is provided with a feed inlet 8, which is usually equipped with a screw feeder to continuously and stably introduce sludge onto the partition 4. Not limited to this example, it can also be used in conjunction with common sludge conveying or storage devices such as sludge pumps and sludge silos.

[0034] The other end of the cover 1 is provided with a discharge port 9, and a cooler can be installed below the discharge port 9, with a cooling medium pipeline inside. A cooling medium (such as water or air) is used to exchange heat with the dry sludge through the pipeline inside the cooler, reducing the temperature of the dry sludge to below 40°C.

[0035] The surface of the partition 4 and the inside of the cover 1 are coated with Teflon, which effectively reduces the phenomenon of sludge sticking to the wall.

[0036] The cover 1 is equipped with an auxiliary mechanism for pushing sludge backward near the feed inlet 8, as well as an auxiliary mechanism for scraping the surface of the partition 4.

[0037] The auxiliary mechanism includes three horizontal shafts 10 extending horizontally in the width direction relative to the cover 1. Both ends of each horizontal shaft 10 are rotatably connected to the inner wall of the cover 1 via bearings. One end of one horizontal shaft 10 passes through the cover 1, and its exposed end is keyed to a driven sprocket 11. A drive motor is fixed outside the cover 1. The output shaft of the drive motor is mounted with a driving sprocket via a reducer. The driving sprocket and the driven sprocket 11 are driven by a chain. This is a conventional drive structure and is not limited to this example; other drive structures capable of driving shafts to rotate are also applicable.

[0038] One end of the horizontal shaft 10 is provided with a transmission sprocket 12, on which a transmission chain is wound, driving the horizontal shaft 10 to rotate through chain drive. Not limited to this example, belt drive or gear drive layers can also be used to drive the transmission between the horizontal shafts 10, and the structure for transmission between other shaft components is equally applicable.

[0039] Multiple sets of bushings 13 are provided on the horizontal shaft 10. Each set of bushings 13 consists of two bushings. A fastening screw 14, threadedly connected to the side wall of each bushing 13, secures the bushing 13 to a specific position on the horizontal shaft 10, facilitating disassembly and adjustment of the fixed position. A swing rod 15, perpendicular to the horizontal shaft 10, is fixed to each bushing 13. A hanging rod 16 passes through the end of the swing rod 15 away from the bushing 13. The hanging rod 16 has a circular cross-section, allowing it to tangentially engage with the inner wall of the oblong hole 18.

[0040] To facilitate the description of each set of bushings 13, each set of two bushings 13 is defined as the first bushing 13 and the second bushing 13, respectively. The hanging rods 16 of the first bushing 13 and the second bushing 13 extend relative to each other and are coaxially aligned. A hanging sleeve 17 is provided between the first bushing 13 and the second bushing 13. The hanging sleeve 17 has a waist-shaped hole 18 that runs horizontally through it. The two ends of the waist-shaped hole 18 are semi-circular and the diameter is larger than the diameter of the hanging rod 16. The length of the waist-shaped hole 18 is larger than the diameter of the semi-circular ends of the waist-shaped hole 18. When this type of hanging sleeve 17 is hung on the hanging rod 16, there is a loose margin between the waist-shaped hole 18 and the hanging rod 16, and there is room for movement in the horizontal direction and a larger room for movement in the vertical direction. This allows the scraper 19 to adapt to vibration when it falls on the partition plate 4, and the bottom side of the scraper 19 can fall on the partition plate 4 within a certain swing amplitude when the swing rod 15 is located below.

[0041] (The direction from the feed inlet 8 to the discharge outlet is defined as backward.) A scraper 19 is fixed on the hanging sleeve 17. The middle part of the scraper 19 arches towards the end near the feed inlet 8, which can better catch and push the material. The two ends of the scraper 19 have triangular tooth tips 20, which point away from the arched end. As it swings backward, it can separate and break up the clumps of sludge, promoting sludge dispersion. The bottom side of the scraper 19 has a scraping side 21. The scraping side 21 forms an arc-shaped arrow "<" shape based on the arch of the scraper 19. When the swing rod 15 swings below the horizontal axis 10, the scraping side 21 falls on the partition plate 4 and scrapes the sludge accumulated on the partition plate 4 away from the feed inlet 8 as the horizontal axis 10 rotates, promoting the sludge to be pushed backward.

[0042] The scrapers 19 of adjacent horizontal axes 10 are staggered, which can push sludge at different positions in an alternating manner.

[0043] like Figure 6 As shown, when the swing rod 15 is vertically downward, and the scraping side 21 of the scraper 19 rests on the partition 4, the hanging rod 16 is located in the middle of the hanging sleeve 17. This allows the hanging sleeve 17 to have sufficient margin in the vertical direction to accommodate vibration, and also sufficient margin in the horizontal direction to accommodate left and right swinging. The scraper 19 is made of metal and can naturally fall onto the partition 4 based on gravity. Because the gap between the hanging sleeve 17 and the hanging rod 16 is sufficient, when the swing rod 15 swings within a certain angle at the bottom of the horizontal axis 10, such as... Figure 6 As shown in the left and right figures, the scraping side 21 of the scraper 19 can fall on the partition plate 4, so that when the swing rod 15 swings to the bottom, the scraper 19 can be kept on the partition plate 4 and the scraper 19 can be dragged backward a distance, which can achieve a good scraping effect and effectively carry the sludge backward.

[0044] This device, based on the vibratory fluidized bed drying system, features innovative improvements at the feed inlet 8. By incorporating an auxiliary mechanism near the feed inlet 8 on the shroud 1, it not only pushes the sludge backward but also scrapes the surface of the baffle 4, effectively solving the problems of sludge adhesion and initial poor material flow. The special design of the scraper 19, such as its arched center, triangular toothed tips 20 at both ends, and arc-shaped scraping side 21 at the bottom, allows it to effectively collect, push, separate, and break up sludge clumps during its oscillation, promoting sludge dispersion. Simultaneously, the scraping side 21 scrapes the sludge accumulated on the baffle 4 backward with the rotation of the horizontal axis 10, ensuring uniform backward movement of the sludge and improving drying efficiency and uniformity. Furthermore, the loose fit between the scraper 19 and the sleeve 17, as well as the movement space between the sleeve 17 and the hanging rod 16, allows the scraper 19 to adapt to the vibration and oscillation of the fluidized bed, maintaining good contact with the baffle 4 and further enhancing the scraping effect. Furthermore, the structure also fully considers flexibility and convenience in the disassembly, assembly, and adjustment of the bushing 13 and scraper 19. During installation and disassembly, only the fastening screws 14 on the bushing 13 need to be removed to release the bushing 13 from its fixation relative to the transverse axis 10. First, the spacing and position of the scraper 19 can be adjusted, and the density and stagger of the scraper 19 can be flexibly set according to the desired effect. Second, the two bushings 13 in each group can be separated to quickly disassemble and replace the scraper 19. Therefore, in addition to its outstanding performance in feeding and scraping, the structure also takes into account flexible use and convenient disassembly and assembly, making it very practical.

Claims

1. A sludge drying and treatment device, characterized in that, The device includes a cover and a body arranged vertically, with a perforated partition installed between the cover and the body. One end of the cover has a feed inlet, and the end of the cover near the feed inlet has an auxiliary mechanism. The auxiliary mechanism includes a horizontal axis extending horizontally along the width of the cover. Several horizontal axes are equidistant from each other along the length of the cover. The horizontal axes have a rotational motion. Multiple swing rods are arranged perpendicularly to the horizontal axes. The end of each swing rod away from the horizontal axis has a hanging rod parallel to the horizontal axis. A hanging sleeve is fitted onto the hanging rod, and a scraper is provided on the hanging sleeve.

2. The sludge drying and treatment device according to claim 1, characterized in that, There is a gap between the hanging sleeve and the hanging rod.

3. The sludge drying and treatment device according to claim 1, characterized in that, Multiple sets of bushings are provided on the horizontal axis, with two bushings in each set. One end of the swing rod is fixed to the bushing, and the hanging rods of the two bushings in the same set extend relative to each other and are coaxially aligned.

4. The sludge drying and treatment device according to claim 3, characterized in that, The bushing is slidably connected to the horizontal shaft, and a fastening screw threaded through the side wall of the bushing is threaded to it, with the inner end of the fastening screw in contact with the horizontal shaft.

5. The sludge drying and treatment device according to claim 1, characterized in that, The scrapers on adjacent horizontal axes are staggered.

6. The sludge drying and treatment device according to claim 1, characterized in that, The hanging sleeve has a horizontal through-hole in the shape of an oblong shape. The two ends of the oblong shape are semi-circular and the diameter is larger than the diameter of the hanging rod. The length of the oblong shape is not less than twice its width. The hanging rod is set inside the oblong shape.

7. The sludge drying and treatment device according to claim 1, characterized in that, The scraper arches in the middle towards the feed inlet, and has triangular teeth at both ends pointing away from the feed inlet. The scraper has a scraping side on its bottom side, which forms an arc-shaped arrow based on the arching of the scraper.

8. The sludge drying and treatment device according to claim 1, characterized in that, Both ends of the horizontal shaft are rotatably connected to the inner wall of the cover via bearing components. One end of the horizontal shaft is provided with a transmission sprocket, and a transmission chain is wound on the transmission sprocket. One end of one horizontal shaft passes through the cover and its exposed end is keyed to a driven sprocket. A drive motor is fixed outside the cover. The output shaft of the drive motor is equipped with a driving sprocket via a reducer. The driving sprocket and the driven sprocket are driven by a chain.

9. The sludge drying and treatment device according to claim 1, characterized in that, The bottom of the machine body is provided with a shock-absorbing structure, a vibration motor is installed on the machine body, an airflow inlet is provided on the machine body, multiple air boxes are provided along its length inside the machine body, the airflow inlet is provided for each air box, multiple suction ports are provided on the top of the cover, and a discharge port is provided at the end of the cover away from the feed port.

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