A belt sludge dryer

Abstract

This utility model discloses a belt sludge dryer, including a male connector body and a female connector body. A threaded sleeve is rotatably fitted onto the outer surface of the male connector body. Two locking holes, extending to the inner side, are symmetrically formed on the outer surface of the threaded sleeve at its opening. In this utility model, an integrated elastic locking rod, in conjunction with auxiliary pressure plates, achieves a single-step "screw-in lock" operation, solving the problem of cumbersome operation of separate locking components. The user only needs to press the pre-compressed springs on both auxiliary pressure plates simultaneously with one hand, rotate the threaded sleeve until fully engaged, and then release. The rod body automatically springs into the locking hole to complete the lock, requiring no additional maneuvering. This design seamlessly integrates the locking / unlocking action with the thread tightening process, avoiding the difficulties of multi-step collaborative operation in confined spaces. It is particularly suitable for high-frequency insertion and removal scenarios, improving assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge treatment equipment, and in particular to a belt sludge dryer. Background Technology

[0002] Belt sludge dryers are common thermal drying equipment in the field of municipal and industrial sludge treatment. Their basic working method is to spread wet sludge on a non-porous conveyor belt and use hot air to heat its surface during the conveying process to evaporate the moisture.

[0003] However, this traditional structure has significant limitations. First, hot air typically only acts on the surface of the sludge, causing rapid evaporation of surface moisture and the formation of a hard, dried crust. This crust severely hinders the escape of moisture from the sludge's interior, resulting in uneven drying, low efficiency, increased energy consumption, and often requiring subsequent crushing. Second, to improve drying efficiency, some equipment is equipped with mechanical turning devices, but the turning process easily leads to sludge splashing and adhesion to the equipment, and it is difficult to achieve uniform turning throughout the process, resulting in processing dead zones. The low heat and mass exchange efficiency of the entire drying process, and the difficulty in balancing equipment processing capacity and drying quality, has become a key technical bottleneck restricting its further widespread application.

[0004] Therefore, we propose a belt sludge dryer. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a belt sludge dryer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a belt sludge dryer, comprising a belt conveyor and a controller, wherein the belt surface of the belt conveyor is uniformly provided with a plurality of air holes;

[0007] A short air hood is fixedly connected to one side of the inner wall of the belt conveyor, and the bottom opening of the short air hood is sealed and fitted to the inner bottom wall of the belt of the belt conveyor. A pumping assembly is installed between the short air hood and the belt conveyor.

[0008] A long air hood is fixedly connected to one side of the inner wall of the belt conveyor, and the top opening of the long air hood is sealed and fitted to the inner top wall of the belt of the belt conveyor. A hot air supply assembly is installed between the long air hood and the belt conveyor.

[0009] The top two sides of the belt conveyor are fixedly connected to a housing, and a material dispersing assembly penetrating into the interior is provided on one side of the top of the housing.

[0010] The inner top wall of the housing is symmetrically fixedly connected to two side plates, and the side plates are sealed and fitted to the top of the belt of the belt conveyor. Multiple inclined plates are fixedly connected between the two side plates, and the inclined plates are also sealed and fitted to the top of the belt of the belt conveyor.

[0011] A feeding plate is fixedly connected between the two side plates, and the feeding plate is sealed and fitted to the curved surface of the belt conveyor.

[0012] Furthermore, the bottom of the belt conveyor is fixedly connected to a support frame, which provides a stable foundation support for the entire drying machine.

[0013] Furthermore, the bottom of the belt conveyor is sealed with a waste discharge trough, which is located below the short air hood and is fixedly connected to the support frame. The waste discharge trough can effectively collect and discharge sludge particles and condensate blown out from the air holes.

[0014] Furthermore, the air pump assembly includes an air pump, which is fixedly installed on one side of the outer wall of the belt conveyor. The air outlet of the air pump is fixedly connected to an air pipe, which runs through the belt conveyor and is fixedly connected to a short air hood. This assembly constitutes a highly efficient and direct air hole cleaning system that can use high-pressure airflow to back-blow away blocked air holes.

[0015] Furthermore, the hot air supply assembly includes an industrial hot air blower, which is fixedly mounted on a support frame. The hot air outlet of the industrial hot air blower is fixedly connected to a fixed pipe, and the air outlet of the fixed pipe is fixedly connected to a distribution pipe. Multiple connecting pipes are evenly fixedly connected to one side of the outer surface of the distribution pipe, and the connecting pipes pass through the belt conveyor and are fixedly connected to the long air hood. This layout structure is reasonable, utilizes the space of the support frame to fix the heat source, and through the design of the distribution pipe and multiple connecting pipes, distributes the hot air evenly and stably to various areas of the long air hood.

[0016] Furthermore, the dispersing and feeding assembly includes a hopper that penetrates the shell and is fixedly connected to the shell. The discharge end of the hopper is located between two side plates. A drive motor is fixedly connected to the outer surface of the hopper, and the drive shaft of the drive motor penetrates the hopper and is fixedly connected to a dispersing roller. The dispersing roller is rotatably connected to the shell. This assembly mechanically disperses the wet sludge at the initial feeding stage, effectively breaking up large clumps of material and reducing them to fine particles.

[0017] Furthermore, the top of the housing is fixedly connected with multiple exhaust hoods to facilitate connection with downstream waste gas treatment equipment.

[0018] The beneficial effects of this utility model are:

[0019] 1. When in use, this utility model uses evenly distributed air holes on the surface of the belt, combined with a long air hood and a hot air supply component, to enable hot air to penetrate the sludge layer from bottom to top, significantly enhancing the efficiency of heat and mass transfer; at the same time, the inclined plate structure drives the sludge to continuously turn over, breaking the surface crust and increasing the drying contact area, thereby greatly improving the drying uniformity and processing capacity.

[0020] 2. When in use, this utility model uses a short air hood and a pump assembly to blow away blocked air holes in opposite directions, effectively maintaining the unobstructed air holes and system stability. Combined with the waste discharge tank to collect blown-off impurities, it avoids air hole blockage affecting drying efficiency, ensures long-term continuous and stable operation of the equipment, and reduces maintenance frequency. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the shell of this utility model without its three-dimensional structure.

[0024] Figure 3 This is a schematic diagram showing the positions of the short and long air hoods of this utility model.

[0025] Figure 4 This is a cross-sectional view of the hopper structure of this utility model.

[0026] The attached figures are labeled as follows:

[0027] 1. Belt conveyor; 2. Hopper; 3. Fixed pipe; 4. Exhaust hood; 5. Shell; 6. Controller; 7. Side plate; 8. Feed plate; 9. Waste discharge trough; 10. Air pump; 11. Industrial hot air blower; 12. Air distribution duct; 13. Drive motor; 14. Inclined plate; 15. Support frame; 16. Air hole; 17. Long air hood; 18. Connecting pipe; 19. Short air hood; 20. Air pipe; 21. Dispersing roller. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-4 As shown, this invention relates to a belt sludge dryer, including a belt conveyor 1 and a controller 6. The belt conveyor 1 has a plurality of evenly distributed air holes 16 on its surface. The belt conveyor 1 is the basic framework and power transmission core of the entire equipment, and it uses a motor-driven roller (not shown in the figure) to drive the annular belt to rotate at a uniform speed. The key innovation of this design lies in the belt itself. It is not a traditional conveyor belt without holes or with a simple structure, but rather made of high-temperature resistant, high-strength synthetic materials such as polyester, nylon, or Teflon-coated fiberglass cloth. It possesses excellent tensile strength, flexibility, and chemical stability, and can withstand the corrosion of sludge and the temperature of hot air heating. The surface of the belt is specially designed with a plurality of evenly distributed air holes 16. The diameter and spacing of these air holes 16 are calculated to ensure that hot air can penetrate evenly and smoothly while preventing excessive leakage of wet sludge during initial spreading.

[0030] A short air hood 19 is fixedly connected to the inner wall of one side of the belt conveyor 1, and the bottom opening of the short air hood 19 is sealed and fitted to the inner bottom wall of the belt of the belt conveyor 1. A pumping assembly is installed between the short air hood 19 and the belt conveyor 1. The pumping assembly includes an air pump 10, and the air pump 10 is fixedly installed on the outer wall of one side of the belt conveyor 1. An air pipe 20 is fixedly connected to the air outlet of the air pump 10, and the air pipe 20 passes through the belt conveyor 1 and is fixedly connected to the short air hood 19. The bottom opening of the short air hood 19 is dynamically sealed and fitted to the inner bottom wall of the belt through an elastic sealing strip such as rubber or silicone.

[0031] A long air hood 17 is fixedly connected to one side of the inner wall of the belt conveyor 1, and the top opening of the long air hood 17 is sealed and fitted to the inner top wall of the belt of the belt conveyor 1. A hot air supply assembly is installed between the long air hood 17 and the belt conveyor 1. The hot air supply assembly includes an industrial hot air blower 11, and the industrial hot air blower 11 is fixedly installed on the support frame 15. The hot air outlet of the industrial hot air blower 11 is fixedly connected to a fixed pipe 3. The air outlet of the fixed pipe 3 is fixedly connected to a distribution pipe 12. Multiple connecting pipes 18 are evenly fixedly connected to one side of the outer surface of the distribution pipe 12. The connecting pipes 18 pass through the belt conveyor 1 and are fixedly connected to the long air hood 17. The top opening of the long air hood 17 is dynamically sealed and fitted to the inner top wall of the belt through a similar sealing device.

[0032] The top two edges of the belt conveyor 1 are fixedly connected to the housing 5. Multiple exhaust hoods 4 are fixedly connected to the top of the housing 5. A dispersing and feeding assembly is provided on one side of the top of the housing 5, which extends into the interior. The dispersing and feeding assembly includes a hopper 2, which is set through the housing 5 and fixedly connected to the housing 5. The discharge end of the hopper 2 is located between two side plates 7. A drive motor 13 is fixedly connected to the outer surface of the hopper 2. The drive shaft of the drive motor 13 is set through the hopper 2 and fixedly connected to a dispersing roller 21. The dispersing roller 21 is rotatably connected to the housing 5. The exhaust hoods 4 are connected to the external exhaust pipe and the exhaust gas treatment device to discharge the high humidity and high temperature exhaust gas generated during the drying process in a timely manner. The dispersing roller 21 and the hopper 2 are rotatably connected by existing bearings and sealed by a sealing ring located inside the hopper 2.

[0033] Two side plates 7 are symmetrically fixedly connected to the inner top wall of the housing 5, and the side plates 7 are sealed and fitted to the top of the belt of the belt conveyor 1. Multiple inclined plates 14 are fixedly connected between the two side plates 7, and the inclined plates 14 are also sealed and fitted to the top of the belt of the belt conveyor 1.

[0034] A feeding plate 8 is fixedly connected between the two side plates 7, and the feeding plate 8 is sealed and fitted to the arc surface of the belt of the belt conveyor 1.

[0035] A support frame 15 is fixedly connected to the bottom of the belt conveyor 1. A waste discharge trough 9 is sealed and fitted to the bottom of the belt of the belt conveyor 1. The waste discharge trough 9 is located below the short air hood 19 and is fixedly connected to the support frame 15.

[0036] The controller 6 is electrically connected to the air pump 10, the industrial hot air blower 11, the drive motor 13, and the belt conveyor 1, which facilitates the control of the overall operation.

[0037] I. Feeding and Breaking Up:

[0038] Wet sludge is fed into the top hopper 2. The drive motor 13 drives the dispersing roller 21 to rotate, breaking up any large clumps of sludge that may clump into uniform small particles, ensuring uniformity in subsequent drying. The dispersed sludge is then evenly distributed through the outlet of hopper 2 onto the belt of the uniformly moving belt conveyor 1, forming an initial material layer.

[0039] II. Sludge agitation:

[0040] The belt carries the sludge layer forward, passing over multiple inclined plates 14 fixed between the side plates 7. The lower edges of the inclined plates 14 are sealed against the belt surface. As the sludge passes over the inclined plates 14, it is squeezed and blocked by them, forcing its movement path to change from horizontal movement to sliding upwards along the inclined surface of the plates 14. Subsequently, under its own weight and the combined effect of continuously flowing sludge, the sludge tumbles and falls from the upper edge of the inclined plates 14, scattering back onto the belt. This process achieves mechanical tumbling of the sludge.

[0041] III. Hot air drying:

[0042] The high-temperature dry air generated by the industrial hot air blower 11 is distributed through the fixed pipe 3 and the air distribution pipe 12, and then transported to the long air hood 17 via multiple connecting pipes 18. The top opening of the long air hood 17 is sealed against the inner top wall of the belt, forming a closed chamber. The hot air filling this chamber is forced upward through evenly distributed air holes 16 under positive pressure, penetrating into the sludge. The hot air comes into full contact with the agitated and loosened sludge, efficiently heating the sludge, evaporating the moisture, and carrying away the evaporated water vapor. The agitation effect of the inclined plate 14 significantly increases the contact area between the hot air and the sludge, avoiding drying dead zones and maximizing the efficiency of this penetration drying process.

[0043] IV. Exhaust:

[0044] Before the equipment is used, the exhaust hood 4 is connected to the existing external exhaust gas treatment equipment to extract high-temperature and humid air. The large amount of high-temperature and humid air generated by evaporation is eventually discharged from the system through multiple exhaust hoods 4 on the top of the housing 5.

[0045] V. Material preparation:

[0046] After drying, the sludge moves along the conveyor belt to the head roller, where it is scraped off the belt with the assistance of the discharge plate 8, completing the collection process.

[0047] VI. Cleaning and maintenance of pore 16:

[0048] Air pump 10 pumps air into short air hood 19 through air pipe 20. The bottom opening of short air hood 19 is sealed against the inner bottom wall of the belt, forming a closed chamber. The positive pressure gas in this chamber is forced outward from the inside of the belt through the blocked air hole 16, effectively blowing away the sludge particles blocking the air hole 16, keeping the air hole 16 unobstructed, and thus ensuring the efficiency of hot air penetration in the third step.

[0049] The blown-off sludge particles and a small amount of dripping water fall downwards into the waste discharge tank 9, where they are collected and discharged from the system.

[0050] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A belt sludge dryer comprising a belt conveyor (1), a controller (6), characterized in that: The belt surface of the belt conveyor (1) is evenly provided with several air holes (16); A short air hood (19) is fixedly connected to one side of the inner wall of the belt conveyor (1), and the bottom opening of the short air hood (19) is sealed and fitted to the inner bottom wall of the belt of the belt conveyor (1). A pump assembly is installed between the short air hood (19) and the belt conveyor (1). A long air hood (17) is fixedly connected to one side of the inner wall of the belt conveyor (1), and the top opening of the long air hood (17) is sealed and fitted to the inner top wall of the belt of the belt conveyor (1). A hot air supply assembly is installed between the long air hood (17) and the belt conveyor (1). The top two sides of the belt conveyor (1) are fixedly connected to a housing (5), and a material dispersing assembly penetrating into the interior is provided on one side of the top of the housing (5). The inner top wall of the housing (5) is symmetrically fixedly connected to two side plates (7), and the side plates (7) are sealed and attached to the top of the belt of the belt conveyor (1). A number of inclined plates (14) are fixedly connected between the two side plates (7), and the inclined plates (14) are also sealed and attached to the top of the belt of the belt conveyor (1). A feeding plate (8) is fixedly connected between the two side plates (7), and the feeding plate (8) is sealed and fitted to the belt arc surface of the belt conveyor (1).

2. A belt type sludge dryer according to claim 1, characterized in that: The bottom of the belt conveyor (1) is fixedly connected to a support frame (15).

3. A belt type sludge dryer according to claim 2, characterized in that: The bottom of the belt conveyor (1) is sealed with a waste discharge trough (9), and the waste discharge trough (9) is located below the short air hood (19) and is fixedly connected to the support frame (15).

4. A belt type sludge dryer according to claim 1, characterized in that: The air pump assembly includes an air pump (10), which is fixedly installed on one side of the outer wall of the belt conveyor (1). The air outlet of the air pump (10) is fixedly connected to an air pipe (20), which passes through the belt conveyor (1) and is fixedly connected to a short air hood (19).

5. A belt type sludge dryer according to claim 2, characterized in that: The hot air supply assembly includes an industrial hot air blower (11), which is fixedly mounted on a support frame (15). The hot air outlet of the industrial hot air blower (11) is fixedly connected to a fixed pipe (3), and the air outlet of the fixed pipe (3) is fixedly connected to a distribution pipe (12). Multiple connecting pipes (18) are evenly fixedly connected to one side of the outer surface of the distribution pipe (12), and the connecting pipes (18) pass through the belt conveyor (1) and are fixedly connected to the long air hood (17).

6. A belt type sludge dryer according to claim 1, characterized in that: The material dispersing assembly includes a hopper (2), which is disposed through the housing (5) and fixedly connected to the housing (5). The discharge end of the hopper (2) is located between two side plates (7). A drive motor (13) is fixedly connected to the outer surface of the hopper (2), and the drive shaft of the drive motor (13) is disposed through the hopper (2) and fixedly connected to a dispersing roller (21). The dispersing roller (21) is rotatably connected to the housing (5).

7. A belt type sludge dryer according to claim 1, characterized in that: The top of the housing (5) is fixedly connected to multiple exhaust hoods (4).

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