Sludge dryer

Abstract

The utility model relates to the field of sludge treatment, in particular to a sludge dryer. According to the technical scheme, the sludge drying machine comprises a box body, a first conveying belt assembly and a second conveying belt assembly are arranged in the box body, the first conveying belt assembly and the second conveying belt assembly are connected in the conveying direction, the first conveying belt assembly is located in front of the conveying belt assembly, and a filter pressing assembly is arranged above the first conveying belt assembly; and a drying assembly is arranged in the box body corresponding to the second conveying belt assembly. According to the scheme, sludge is conveyed in the form of the conveying belt, the filter pressing assembly and the drying assembly are sequentially arranged in the conveying direction, the sludge can be subjected to filter pressing dehydration and then dried along with continuous operation of the conveying belt, the two procedures are conducted at the same time, continuous production is achieved, the production efficiency is improved, and meanwhile the production cost is reduced. Waste heat of the drying assembly can heat sludge of the filter pressing part, and the overall dewatering effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of sludge processing equipment, in particular to a sludge drying machine. Background Art

[0002] Sludge drying is an environmentally friendly technology specifically designed to treat river and canal sludge containing a variety of microorganisms. Sludge is dried so that it can be used for other purposes, such as agricultural fertilizer, thereby reducing the pollution of the environment by sludge.

[0003] Hot air drying is a commonly used sludge drying method. This method uses high-temperature hot air to evaporate the water in the sludge, thereby reducing the humidity of the sludge. The advantages of hot air drying are simple operation, stable effect, and applicable to different types of sludge. Sludge dryer is the main equipment for sludge drying. It uses hot air drying method, sets heating equipment such as hot air blower inside the machine body, and dries the sludge as the sludge is transported and operated.

[0004] The sludge is taken from the riverbed and canal silt, which has a very high water content. Simple hot air drying cannot directly dry the sludge, so it is necessary to remove most of the water in the sludge first to achieve the degree of agglomeration. The conventional practice is to spread the sludge in the sun to make it compacted, but this method takes too long. In addition, there are some sludge dryers that can perform preliminary dehydration treatment on the sludge, such as the technology disclosed in patent CN218811295U, which is arranged in layers in the sludge dryer, and a pressure roller is arranged on the upper layer to crush the sludge on the tray structure to squeeze out the water, and then the tray is turned over to pour the sludge into the lower layer for crushing, and then drying.

[0005] Although this technology integrates the two main steps of dehydration and drying in sludge treatment, the solution is a rhythmic treatment, that is, the sludge is crushed and dehydrated before being poured into the lower layer and dried. For the same equipment, the single processing capacity is limited.

[0006] Aiming at the problem that the single-time processing volume of the current sludge drying equipment with a filter pressing function is limited, the utility model provides a sludge drying machine which can produce continuously and has higher processing efficiency.

[0007] To achieve the above objectives, the technical solution adopted by the utility model is: a sludge dryer, including a box body, in which a first conveyor belt assembly and a second conveyor belt assembly are arranged, the first conveyor belt assembly and the second conveyor belt assembly are connected in the conveying direction and the first conveyor belt assembly is located in front of the conveyor belt assembly, a filter press assembly is arranged above the first conveyor belt assembly, and a drying assembly is arranged inside the box body at a position corresponding to the second conveyor belt assembly.

[0008] This solution uses a conveyor belt to transport the sludge. In the conveying direction, the filter press component and the drying component are arranged in sequence. As the conveyor belt continues to run, the sludge can be first filtered and dehydrated, and then dried. The two processes are carried out simultaneously, realizing continuous production and improving production efficiency. At the same time, the waste heat of the drying component can heat the sludge in the filter press part and improve the overall dehydration effect.

[0009] Preferably, the filter press assembly includes a lifting device, and the lifting part of the lifting device is equipped with multiple filter press rollers, the rotation axis of the filter press rollers is horizontally arranged and perpendicular to the conveying direction of the first conveyor belt assembly, and the multiple filter press rollers are arranged along the conveying direction of the first conveyor belt assembly. The filter press assembly uses multiple rollers arranged in parallel to increase the length of the "filter press section" and improve the filter press effect; at the same time, the lifting device is used to adjust the downward pressure height of the rollers to control the degree of filter press.

[0010] Preferably, the conveying and lifting device includes a rectangular frame, each of the filter press rollers is installed in the rectangular frame, a screw is provided on the top of the rectangular frame, a screw drive assembly is installed on the top of the box body, the screw drive assembly includes a motor and an internal threaded barrel, the motor output shaft is connected to a second gear, the internal threaded barrel is rotatably connected to the box body, the outer wall of the internal threaded barrel is fixedly connected to a first gear, the first gear is meshed with the second gear, and the screw thread is installed inside the internal threaded barrel; the screw and the screw drive assembly are correspondingly arranged in at least two groups, and / or a guide structure is also provided between the rectangular frame and the box body.

[0011] Preferably, each filter press roller is provided with a filter press belt on its outer side. The filter press belt is provided on the filter press roller to form a complete filter press plane, and cooperates with the conveyor belt to form extrusion between the surfaces, thereby further improving the filter press effect.

[0012] Preferably, the guide structure includes a guide rod arranged on the top of the rectangular frame, a guide hole is opened at a corresponding position on the top of the box, and the guide rod is slidably inserted into the guide hole. The guide rod structure is used for guide support to reduce the bending moment of the screw.

[0013] Preferably, a water receiving bucket is provided below the first conveyor belt assembly, and a drainage pipe is provided below the water receiving bucket, so as to timely discharge the water pressed out by the filter press.

[0014] Preferably, the drying component includes a hot air box and an air outlet structure, the hot air box is located below the second conveyor belt component, the air outlet structure includes a guide cover and a gas filter box, the guide cover is installed at the top of the box body and is located above the second conveyor belt component, the gas filter box is installed above the box body, the upper end of the guide cover is connected to the inside of the gas filter box, and a gas filter element is arranged in the gas filter box. The air outlet structure of the drying component is provided with a gas filter element, which can filter harmful substances and odors in the drying exhaust gas to reduce pollution to the external environment.

[0015] Preferably, one side of the gas filter box is open, and a cover plate is provided at the open surface. A vertical plate is provided inside the gas filter box, and the vertical plate is parallel to the cover plate. The area of ​​the vertical plate matches the opening area of ​​the open surface. A mesh plate is fixedly installed between the vertical plate and the cover plate, and the gas filter element is placed on the mesh plate. A locking pin structure is also provided between the cover plate and the gas filter box. The gas filter box adopts a drawer-type structure, which can conveniently replace the gas filter element.

[0016] Preferably, the horizontal position of the first conveyor belt assembly is higher than that of the second conveyor belt assembly. The two conveyor belt assemblies form a stepped structure, and the sludge falls at the junction of the two, which can break the pressed sludge and facilitate subsequent drying.

[0017] Preferably, a loosening roller assembly is further provided above the second conveyor belt assembly, and a convex tooth structure is provided on the outer peripheral surface of the roller body of the loosening roller assembly, so as to further break up the sludge blocks and improve the drying effect.

[0018] It can be seen from the above technical scheme that the advantages of the utility model are: this scheme optimizes the design of the sludge dryer, adopts a two-level conveyor belt structure to transport sludge, and sequentially arranges filter pressing and drying components. With the operation of the conveyor belt, filter pressing and drying are carried out simultaneously, and continuous processing is achieved, which optimizes the processing process and improves the processing efficiency; the filter pressing component cooperates with the conveyor belt structure to form surface extrusion, and the downward pressure amplitude can be adjusted, which is convenient for adjusting the filter pressing effect; the exhaust part of the drying component is provided with an air filter element, which can reduce pollution to the external environment, and the filter element is easy to replace and the air filtering effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the main cross-sectional structure of a specific implementation method of the utility model.

[0021] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the rectangular frame in the utility model.

[0022] Figure 3 for Figure 1 A partial enlarged view of part A.

[0023] Figure 4 for Figure 1 A partial enlarged view of part B.

[0024] Figure 5 It is a schematic diagram of the top structure of the gas filter box in the utility model.

[0025] Figure 6 for Figure 5 A partial enlarged view of part C.

[0026] Description of main reference numerals

[0027] 1. Box body; 2. First conveyor belt assembly; 3. Feed hopper; 4. Water receiving hopper; 5. Second conveyor belt assembly; 6. Hot air box; 7. Air guide cover; 8. Mud loosening roller assembly; 9. Rectangular frame; 10. Filter press roller; 11. Screw; 12. Cylinder; 13. Internally threaded cylinder; 14. First gear; 15. Motor; 16. Second gear; 17. Gas filter box; 18. Vertical plate; 19. Cover plate; 20. Mesh plate; 21. Gas filter element; 22. Clamp hole; 23. Clamp plate; 24. Insert rod; 25. Chamber; 26. Rectangular plate; 27. Spring; 28. Through groove; 29. ​​Pull block. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0029] like Figure 1-6 As shown, a sludge drying machine with filter pressing function comprises a box body 1, Figure 1 In the process, the sludge material is transported from left to right, which is the material transport direction. Figure 1 The left side is the front and the right side is the back (i.e. transporting from front to back):

[0030] A feed hopper 3 is provided at the front top of the box body, and a first conveyor belt assembly 2 and a second conveyor belt assembly 5 are provided in sequence in the box body 1 along the material conveying direction. The first conveyor belt assembly 2 is located in front of the second conveyor belt assembly 5, and the first conveyor belt assembly 2 and the second conveyor belt assembly 5 are respectively connected to a driving device, such as a driving motor connected to a conveyor belt roller (this is a conventional structure of a conveyor belt and will not be repeated here).

[0031] A filter press assembly is installed inside the box 1, and the filter press assembly is located above the first conveyor belt assembly 2. Specifically, Figure 2 , 3 The filter press assembly includes a lifting device, which includes a rectangular frame 9, a pressure driving structure and a guide structure. A plurality of filter press rollers 10 are installed on the lifting part of the lifting device (i.e., in the rectangular frame 9). The two ends of the rotating shaft of the filter press roller 10 are respectively rotatably connected to a group of opposite sides of the rectangular frame. The rotating axis of the filter press roller is horizontally arranged and perpendicular to the conveying direction of the first conveyor belt assembly 2. The plurality of filter press rollers 10 are arranged along the conveying direction of the first conveyor belt assembly, and a filter press belt is commonly sleeved on the outside of each filter press roller, such as Figure 1 As shown, the filter press belt and the filter press roller form a structure similar to a conveyor belt, and the lower surface thereof is opposite to the upper surface of the first conveyor belt assembly 2, and the two cooperate to squeeze the sludge, wherein the filter press roller can be connected to a driving device such as a motor to make the filter press belt rotate actively, or a driving device may not be provided, and the filter press belt can also be passively operated under the drive of the sludge; the pressurized driving structure includes a screw 11 arranged on the top of the rectangular frame. In this embodiment, two screws 11 are provided, which are respectively located at the midpoints of a group of opposite sides of the rectangular frame, and a screw driving assembly is installed on the top of the box body 1 corresponding to each screw 1, and the screw driving assembly includes a motor 15 and an internally threaded barrel 13. A through hole is opened on the top of the box body, and a cylinder 12 is installed on the through hole. The lower part of the threaded barrel 13 is rotatably installed in the cylinder 12, the screw 11 passes through the cylinder upward and is threadedly connected with the internal threaded barrel 13, the outer wall of the internal threaded barrel 13 is fixedly installed with a first gear 14, the motor 15 is vertically installed through the motor seat (that is, the motor output shaft is vertically set), the output shaft of the motor 15 is connected with a second gear 16, the first gear 14 is meshed with the second gear, and the motor 15 drives the internal threaded barrel to rotate through the first and second gears, thereby realizing the lifting and lowering of the screw; the guide structure includes a guide rod arranged at the top of the rectangular frame 9, and a guide hole is opened at the corresponding position on the top of the box body 1, and the guide rod is slidably inserted in the guide hole to reduce the bending moment of the threaded rod.

[0032] A water receiving hopper 4 is also provided at the bottom of the box body. The water receiving hopper 4 is located below the first conveyor belt assembly 2 and is used to receive the water pressed out by the filter press assembly. The water flows down from both sides of the first conveyor belt assembly 2 and flows into the water receiving hopper 4. A drainage pipe is provided at the bottom of the water receiving hopper 4.

[0033] A drying component is provided in the area of ​​the box body 1 corresponding to the second conveyor belt assembly 5, and the drying component includes a hot air box 6 and an air outlet structure. The hot air box 6 is arranged below the second conveyor belt assembly 5, and an upward blowing structure or a natural heating structure is adopted to make the hot air rise naturally to form a heated airflow. The hot air box 6 heats the rear part of the box body 1, and then dries the sludge. At the same time, the heat can also be transferred to the front part of the box body, so that part of the moisture in the sludge can be evaporated during the filtration; the air outlet structure includes a guide cover 7 and a gas filter box 17, the guide cover 7 is installed at the top of the box body 1 and is located above the second conveyor belt assembly 5, the gas filter box 17 is installed above the top surface of the box body 1, the upper end of the guide cover 7 is connected to the inside of the gas filter box 17 to form an exhaust channel, and a gas filter element 21 is arranged in the gas filter box. In the gas filter box, the gas filter element 21 adopts a replaceable design. For details, refer to the attached Figure 4-6 The gas filter box 17 is a rectangular structure with one side open. A cover plate 19 is provided at the open surface of the gas filter box 17. A vertical plate 18 is provided inside the gas filter box. The area of ​​the vertical plate 18 matches the area of ​​the opening. When in the working state, the vertical plate 18 fits the opposite side panel of the opening surface. It can be seen that the vertical plate 18 and the cover plate 19 are parallel to each other. A mesh plate 20 is fixedly installed between the vertical plate 18 and the cover plate 19. The mesh plate 20 is horizontally arranged and perpendicular to the cover plate 19. In this way, the cover The plate 19, the vertical plate 18 and the mesh plate 20 form a drawer-type structure, the gas filter element 21 is placed on the mesh plate 20 and arranged closely, and a locking pin structure is also provided between the cover plate and the gas filter box 17. Specifically, a card plate 23 is provided on the side wall of the opening surface of the gas filter box 17, and the card plate 23 extends to the outside of the opening. A card hole 22 is provided on the side of the cover plate 19 facing the gas filter box corresponding to the position of the card plate. When locking, the card plate 23 is inserted into the card hole 22, and a lock hole is provided on the card plate 23. The axis of the lock hole is perpendicular to the extension direction of the card plate. A chamber 25 is provided inside the cover plate 19, and the chamber 25 is connected to the card hole 22. A rectangular plate 26 is provided in the chamber 25. A plug rod 24 is provided on the side of the rectangular plate 26 facing the card hole 22. A spring 27 is provided between the side of the rectangular plate 26 facing away from the card hole 22 and the inner wall of the chamber 25. When the spring naturally extends, the rectangular plate is pushed, so that the plug rod 24 enters the card hole and is inserted into the lock hole, thereby realizing the connection and locking between the cover plate 19 and the gas filter box 17. In order to facilitate the unlocking of the cover plate 19, a through groove 28 is provided on the cover plate 19 at a position corresponding to the chamber 25. The through groove 28 runs through the chamber 25, and a pull block 29 is fixedly provided on the variable edge of the rectangular plate. The pull block 29 passes through the through groove and protrudes from the outer side of the cover plate 19. The pull block 29 can be moved to drive the rectangular plate to retract, thereby realizing the rapid replacement of the gas filter element 21, thereby effectively ensuring the filtering effect of the gas generated during the drying process and reducing air pollution.

[0034] Furthermore, the sludge is in cake form after pressure filtration. In order to facilitate subsequent drying, the drying box is also provided with a loosening roller assembly 8, which is located above the second conveyor belt assembly 5. The outer surface of the roller body of the loosening roller assembly 8 is provided with a convex tooth structure, which is close to the upper surface of the second conveyor belt assembly to crush the sludge cake. The loosening roller assembly can also be optionally provided with a driving device. When not provided, the loosening roller assembly can be driven by the sludge to achieve follow-up rotation. According to the drying effect, if the sludge reaching the loosening roller assembly has been dried, the loosening roller assembly can also crush the dried sludge; further, the first conveyor belt assembly and the second conveyor belt assembly can also be set as a stepped structure. The horizontal position of the second conveyor belt assembly is lower than that of the first conveyor belt assembly. The sludge cake falls when passing through the transition position and is "broken" on the second conveyor belt assembly. At the same time, a scraper can be provided below the transition position at the rear end of the first conveyor belt assembly to shovel the sludge attached to the first conveyor belt assembly and let it fall on the second conveyor belt.

[0035] The working principle of the utility model is as follows: when in use, the first conveyor belt assembly 2, the second conveyor belt assembly 5, the hot air box 6, the loosening roller assembly 8 and the filter press roller 10 (when the two are actively driven) are started, and then the material is fed through the feed hopper 3, and the sludge falls onto the first conveyor belt assembly 2 for transmission, and the water is filtered out through the filter press roller 10, and the filtered water is collected and discharged through the water receiving bucket 4, and the filtered sludge is transmitted to the second conveyor belt assembly 5, and is dried by hot air during the transmission process. The dried sludge is broken and loosened by the loosening roller assembly 8 and transmitted out, and the gas generated during the drying process enters the gas filter box 17 through the guide cover 7, is filtered by the gas filter element 21 and discharged, and when it is necessary to adjust the filtering force of the filter press roller 10, first turn on the two motors 15, and the output shaft of the motor 15 drives the second gear 16 to rotate, so that the first gear 14 is driven to rotate, and the first gear 14 drives the internal threaded cylinder 13 to rotate, so that the screw rod 11 is driven to rise or fall. , the two screw rods 11 drive the rectangular frame 9 and the filter roller 10 to rise and fall, thereby adjusting the force of the filter press. Through such a setting, the filter press assembly can be quickly adjusted, the force of the filter press can be conveniently adjusted, the actual use needs can be met, and the sludge drying work is greatly convenient. When the gas filter element 21 needs to be replaced, the two pull blocks 29 are first pulled, so that the rectangular plate 26 is driven to slide in the chamber 25, and the spring 27 is compressed. At the same time, the rectangular plate 26 drives the two plug rods 24 to slide out of the corresponding card plate 23, so that the fixation of the card plate 23 is released, and then the cover plate 19 is pulled, so that the multiple mesh plates 20 and the vertical plate 18 are driven to extend out of the gas filter box 17, and the gas filter element 21 is taken out, and then the gas filter element 21 is pulled out for replacement. Through such a setting, it is convenient to quickly replace the gas filter element 21, so that the filtering effect of the gas generated during the drying process can be effectively guaranteed, and air pollution can be reduced.

[0036] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above is only a preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the utility model.

Claims

1. A sludge drying machine, comprising a housing (1), characterized in that: A first conveyor belt assembly (2) and a second conveyor belt assembly (5) are arranged in the box body (1); the first conveyor belt assembly (2) and the second conveyor belt assembly (5) are connected in the conveying direction and the first conveyor belt assembly is located in front of the conveyor belt assembly; a filter press assembly is arranged above the first conveyor belt assembly (2); and a drying assembly is arranged in the box body (1) at a position corresponding to the second conveyor belt assembly (5).

2. The sludge drying machine according to claim 1, characterized in that: The filter press assembly comprises a lifting device, a lifting portion of the lifting device is equipped with a plurality of filter press rollers (10), the rotation axis of the filter press rollers is arranged horizontally and perpendicular to the conveying direction of the first conveyor belt assembly (2), and the plurality of filter press rollers (10) are arranged along the conveying direction of the first conveyor belt assembly.

3. The sludge drying machine according to claim 2, characterized in that: The lifting device comprises a rectangular frame (9), each filter press roller is installed in the rectangular frame, a screw (11) is provided at the top of the rectangular frame (9), a screw drive assembly is installed at the top of the box body (1), the screw drive assembly comprises a motor (15) and an internally threaded barrel (13), the output shaft of the motor (15) is connected to a second gear (16), the internally threaded barrel (13) is rotatably connected to the box body, the outer wall of the internally threaded barrel (13) is fixedly connected to a first gear (14), the first gear (14) is meshed with the second gear, and the screw (11) is threadedly installed inside the internally threaded barrel (13); at least two groups of the screw and the screw drive assembly are correspondingly arranged, and / or a guide structure is further provided between the rectangular frame (9) and the box body.

4. The sludge drying machine according to claim 2, characterized in that: A filter press belt is commonly sleeved on the outside of each filter press roller.

5. The sludge drying machine according to claim 3, characterized in that: The guide structure comprises a guide rod arranged on the top of the rectangular frame (9); a guide hole is provided at a corresponding position on the top of the box body (1); and the guide rod is slidably inserted into the guide hole.

6. The sludge drying machine according to any one of claims 1 to 5, characterized in that: A water receiving bucket (4) is provided below the first conveyor belt assembly (2), and a drainage pipe is provided below the water receiving bucket (4).

7. The sludge drying machine according to any one of claims 1 to 5, characterized in that: The drying assembly comprises a hot air box (6) and an air outlet structure, wherein the hot air box (6) is located below the second conveyor belt assembly (5), and the air outlet structure comprises a flow guide cover (7) and a gas filter box (17), wherein the flow guide cover (7) is installed at the top of the box body (1) and is located above the second conveyor belt assembly (5), and the gas filter box (17) is installed above the box body (1), and the upper end of the flow guide cover (7) is connected to the inside of the gas filter box (17), and a gas filter element (21) is arranged in the gas filter box.

8. The sludge drying machine according to claim 7, characterized in that: One side of the gas filter box (17) is open, and a cover plate (19) is provided at the open surface of the gas filter box (17). A vertical plate (18) is provided inside the gas filter box, and the vertical plate (18) is parallel to the cover plate (19). The area of ​​the vertical plate (18) matches the opening area of ​​the open surface. A mesh plate (20) is fixedly installed between the vertical plate (18) and the cover plate (19), and a gas filter element (21) is placed on the mesh plate (20). A locking pin structure is also provided between the cover plate (19) and the gas filter box (17).

9. The sludge drying machine according to any one of claims 1 to 5, characterized in that: The horizontal position of the first conveyor belt assembly (2) is higher than the horizontal position of the second conveyor belt assembly (5).

10. The sludge drying machine according to any one of claims 1 to 5, characterized in that: A mud loosening roller assembly (8) is also provided above the second conveyor belt assembly, and a convex tooth structure is provided on the outer peripheral surface of the roller body of the mud loosening roller assembly (8).

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