Modular sludge low temperature belt dryer

Abstract

The utility model discloses a modularization sludge low temperature belt type drying -out machine relates to drying -out machine technical field, and the utility model discloses a sludge drying -out machine main part is provided with the sludge conveying belt at the lower part of sludge drying -out machine main part, and the lower part of sludge drying -out machine main part is provided with the discharge chute, one side of sludge conveying belt is equipped with cleaning mechanism, is used for the sludge scraping of the upper attachment of sludge conveying belt, and cleaning mechanism includes: reciprocating assembly includes the baffle of rotation installation in the lower part one side of sludge drying -out machine main part, and the rotation of rotating disc is rotated through the drive motor, and the eccentricity connection drive rod converts the rotary motion into reciprocating motion, so that the linear reciprocating motion of reciprocating scraper connected with the rotation shaft along the baffle surface, and further make the rubber strip of sludge conveying belt surface contact, reciprocating removes and scrapes it, thereby can avoid the sludge of dry knot and attach on sludge conveying belt, also avoided the irreversible damage such as hooking, abrasion of rigid scraper to the precise net face.

Description

Technical Field

[0001] This utility model relates to the field of drying machine technology, specifically a modular sludge low-temperature belt dryer. Background Technology

[0002] The low-temperature belt dryer for sludge mainly utilizes a closed-loop hot air circulation condensation process. Sludge is cut into strips by a strip forming machine and laid on a breathable drying mesh belt, which is then slowly fed into the dryer. The main unit's refrigeration circulation system heats the air into high-temperature, low-humidity air, which then enters the drying chamber from the bottom. This absorbs the moisture from the sludge on the multiple conveyor belts, allowing the sludge to dry gradually from bottom to top. The air, having absorbed enough moisture, is sent back to the evaporator through the air duct for cooling, dehumidification, and moisture removal. Then, through plate heat recovery, the air is preheated after cooling and dehumidification, and the air returning from the drying chamber is precooled, achieving the goal of energy saving and consumption reduction.

[0003] Reference patent document: Patent Publication No. CN118255507B, Patent Publication Date 2024-08-09, discloses a low-temperature belt dryer for sludge, relating to the field of sludge dryer technology. It includes a dryer housing, a first mesh belt conveyor, and a second mesh belt conveyor. A feed hopper is installed at the upper end of one side of the dryer housing, and a discharge hopper is installed at the lower end of the other side of the dryer housing. This low-temperature belt dryer for sludge is equipped with a reciprocating swing mechanism and a perforating mechanism to ensure that the arc-shaped perforating claws move vertically... During the reciprocating rotation, it intermittently punches holes on the upper side of the sludge. Simultaneously, through the threaded transmission between the lead screw and the threaded sleeve, the arc-shaped punching claw also has the function of laterally moving and expanding the holes to pry open the sludge as it reciprocates. This ensures that the sludge spread on the upper side of the No. 1 mesh belt conveyor is punched more efficiently, preventing the holes from being covered by the surrounding sludge after simple punching. It also facilitates the passage of drying gas rising from the bottom of the dryer housing through the sludge to achieve the effect of accelerating drying and dehydration, while preventing the sludge from getting stuck in the mesh of the mesh belt.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found: In current sludge treatment processes, the surface of the sludge rapidly loses water and hardens into a crust during the drying process. The lower layer of sludge tends to form clumps. Due to their physical properties, these clumps exhibit significantly enhanced adhesion to the conveyor belt, causing them to stubbornly adhere to the mesh or surface of the belt during unloading. They cannot detach themselves by gravity, resulting in residual sludge being recycled back to the feeding area with the belt. This contaminates the newly laid wet sludge, affecting the quality and uniformity of the finished product. Furthermore, it may clog the mesh, severely hindering the penetration of the drying medium, leading to decreased heat exchange efficiency and increased equipment energy consumption.

[0005] Therefore, this utility model provides a modular sludge low-temperature belt dryer. Utility Model Content

[0006] To address the problem that hardened sludge clumps formed during sludge drying stubbornly adhere to the conveyor belt, leading to incomplete unloading, this invention aims to provide a modular low-temperature belt dryer for sludge.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a modular sludge low-temperature belt dryer, comprising a sludge dryer body, a sludge discharge conveyor belt at the lower part of the sludge dryer body, a discharge chute at the lower part of the sludge dryer body, and a cleaning mechanism on one side of the sludge discharge conveyor belt for scraping off the sludge adhering to the sludge discharge conveyor belt. The cleaning mechanism includes: The reciprocating assembly includes a baffle that is rotatably installed on one side of the lower part of the sludge dryer body. The upper part of the baffle is in contact with one end of the sludge discharge conveyor belt. A reciprocating scraper is provided on the upper surface of the baffle. A rotating shaft is slidably installed through the middle of the baffle. Both ends of the lower part of the reciprocating scraper are fixedly installed on both ends of the rotating shaft. A drive rod is movably installed on one side of the lower part of the reciprocating scraper. A drive assembly is provided on one side of the drive rod. Adjustment components are located at both ends of the baffle and are used to adjust the angle of the baffle.

[0008] Preferably, the adjusting component includes deflection blocks fixedly installed at both ends of the baffle, and two symmetrically distributed limiting rods fixedly installed at the lower part of the sludge dryer body. Limiting springs are fixedly installed at the upper part of each of the two limiting rods, and limiting rings are fixedly installed at the bottom ends of each of the two limiting springs. The limiting rings are slidably sleeved on the outer surface of the limiting rods, and the bottom end of the limiting rings is in contact with the top end of the deflection blocks.

[0009] Preferably, the drive assembly includes a drive motor fixedly installed on one side of the lower part of the sludge dryer body, a rotating disk fixedly installed on the drive end of the drive motor, and one end of the drive rod movably installed on one side of the rotating disk.

[0010] Preferably, two symmetrically distributed limiting blocks are fixedly installed on the outer side of the rotating shaft, and both limiting blocks are slidably locked in the lower part of the baffle.

[0011] Preferably, a rubber strip is fixedly installed at the top of the reciprocating scraper, and the rubber strip is in contact with one side of the upper surface of the sludge conveyor belt.

[0012] Preferably, a limiting groove is provided in the middle of one side of each of the two deflection blocks, and the two limiting rods are slidably locked in the middle of the limiting groove.

[0013] Beneficial effects This invention provides a modular low-temperature belt dryer for sludge. Compared with existing technologies, it has the following advantages: 1. This application uses a drive motor to drive a rotating disk to rotate, and the rotational motion is converted into reciprocating motion through an eccentrically connected drive rod. This causes the reciprocating scraper connected to the rotating shaft to move linearly back and forth along the surface of the baffle, thereby causing the rubber strip in contact with the surface of the sludge discharge conveyor belt to move back and forth and scrape it. This can prevent the dried sludge from adhering to the sludge discharge conveyor belt and also avoid irreversible damage such as hooking and wear caused by the rigid scraper to the precision mesh surface.

[0014] 2. This application uses a limiting spring and a limiting ring to continuously apply a constant downward pressure to the deflector block, ensuring that the upper edge of the baffle plate always remains in close contact with the lower surface of the conveyor belt. This provides a stable foundation for the scraping action, ensuring the efficiency of sludge removal. Furthermore, when abnormally hard or excessively thick slabs appear on the conveyor belt, the baffle plate overcomes the spring force, causing the limiting rod to deflect at an adaptive angle within the guide groove formed by the limiting groove. This allows the baffle plate and reciprocating scraper to avoid these obstacles, effectively preventing malfunctions such as mechanism jamming, drive motor overload, or damage to the scraper plate or conveyor belt. This achieves stable and reliable operation under complex working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model.

[0019] Figure 5 This is a schematic diagram of the adjustment component structure of this utility model.

[0020] In the diagram: 1. Main body of sludge dryer; 11. Discharge chute; 12. Sludge discharge conveyor belt; 2. Cleaning mechanism; 21. Reciprocating assembly; 211. Drive motor; 212. Rotary disc; 213. Baffle; 214. Reciprocating scraper; 2141. Rubber strip; 215. Rotating shaft; 2151. Limiting block; 216. Drive rod; 22. Adjusting assembly; 221. Deflection block; 222. Limiting rod; 223. Limiting groove; 224. Limiting spring; 225. Limiting ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a modular sludge low-temperature belt dryer, including a sludge dryer body 1, a sludge discharge conveyor belt 12 arranged at the lower part of the sludge dryer body 1, a discharge chute 11 opened at the lower part of the sludge dryer body 1, and a cleaning mechanism 2 provided on one side of the sludge discharge conveyor belt 12 for scraping off the sludge adhering to the sludge discharge conveyor belt 12. The cleaning mechanism 2 includes: The reciprocating assembly 21 includes a baffle 213 rotatably mounted on one side of the lower part of the sludge dryer body 1. The upper part of the baffle 213 is in contact with one end of the sludge discharge conveyor belt 12. The baffle 213 is made of wear-resistant steel plate with a thickness of 8mm. A reciprocating scraper 214 is provided on the upper surface of the baffle 213. A rotating shaft 215 is slidably passed through the middle of the baffle 213. Both ends of the lower part of the reciprocating scraper 214 are fixedly mounted on both ends of the rotating shaft 215. A drive rod 21 is movably mounted on one side of the lower part of the reciprocating scraper 214. 6. The drive rod 216 is installed on the lower side of the drive rod 216 via a fisheye bearing. A drive assembly is provided on one side of the drive rod 216. The drive assembly drives the drive rod 216 to swing back and forth. Since the reciprocating scraper 214 is fixedly installed with the rotating shaft 215 and the rotating shaft 215 is slidably locked in the middle of the baffle 213, the reciprocating scraper 214 can be driven to slide back and forth on the upper surface of the baffle 213. The sludge attached to the upper surface of the sludge discharge conveyor belt 12 is scraped off by the reciprocating movement. Adjustment components 22 are located at both ends of baffle 213 and are used to adjust the angle of baffle 213, thereby adaptively adjusting the contact pressure between baffle 213 and mud discharge conveyor belt 12.

[0023] The adjusting component 22 includes deflection blocks 221 fixedly installed at both ends of the baffle 213. Two symmetrically distributed limiting rods 222 are fixedly installed at the lower part of the sludge dryer body 1. Limiting springs 224 are fixedly installed on the upper part of each of the two limiting rods 222, and limiting rings 225 are fixedly installed at the bottom end of each of the two limiting springs 224. The limiting rings 225 are slidably sleeved on the outer surface of the limiting rods 222. The bottom end of the limiting rings 225 is in contact with the top end of the deflection blocks 221. By the constant downward pressure applied to the deflection blocks 221 by the limiting springs 224, the baffle 213 is always deflected toward the sludge discharge conveyor belt 12, so that the upper edge of the baffle 213 is tightly attached to the surface of the conveyor belt. When a thicker sludge cake appears on the conveyor belt, the limiting springs 224 can be adjusted to achieve adaptive yielding, avoiding damage to components caused by rigid collisions.

[0024] The drive assembly includes a drive motor 211 fixedly installed on one side of the lower part of the sludge dryer body 1. A rotating disk 212 is fixedly installed on the drive end of the drive motor 211. One end of the drive rod 216 is movably installed on one side of the rotating disk 212. Driven by the drive motor 211, the rotating disk 212 can be rotated, which can drive the drive rod 216, which is eccentrically installed on one side of the rotating disk 212, to move back and forth, thereby driving the reciprocating scraper 214 to move back and forth.

[0025] Two symmetrically distributed limiting blocks 2151 are fixedly installed on the outer side of the rotating shaft 215. Both limiting blocks 2151 are slidably locked in the lower part of the baffle 213. By setting the limiting blocks 2151, the rotating shaft 215 can reciprocate in the lower part of the baffle 213, and the tilt angle of its reciprocating scraper 214 can be synchronously controlled according to the tilt angle of the baffle 213.

[0026] A rubber strip 2141 is fixedly installed at the top of the reciprocating scraper 214. The rubber strip 2141 is in contact with the upper surface of one side of the mud discharge conveyor belt 12. The rubber strip 2141 is integrally vulcanized and has a triangular cross section. It maintains a contact gap of 0.1 to 0.3 mm with the upper surface of the mud discharge conveyor belt 12, which can ensure the scraping effect while avoiding damage to the conveyor belt mesh.

[0027] Each of the two deflection blocks 221 has a limiting groove 223 in the middle of one side, and two limiting rods 222 are slidably locked in the middle of the limiting groove 223. By the limiting rods 222 being slidably locked in the limiting groove 223, the limiting rods 222 can limit the baffle 213 laterally while adjusting its tilt angle within the limiting groove 223.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, when the sludge conveyor belt 12 carrying the dried sludge reaches the discharge end, the drive motor 211 starts, driving the rotating disk 212 on its drive end to rotate. Since one end of the drive rod 216 is eccentrically connected to one side of the rotating disk 212 through a bearing, the continuous rotation of the rotating disk 212 is converted into the reciprocating oscillation of the drive rod 216. The other end of the drive rod 216 is movably connected to the lower part of the reciprocating scraper 214. At the same time, the lower ends of the reciprocating scraper 214 are fixed to a rotating shaft 21. 5. The rotating shaft 215 slides through the middle of the baffle 213. Therefore, the reciprocating swing of the drive rod 216 is converted into the horizontal reciprocating sliding of the reciprocating scraper 214 along the upper surface of the baffle 213 through the rotating shaft 215. The rubber strip 2141 fixed to the top of the reciprocating scraper 214 contacts the upper surface of the sludge discharge conveyor belt 12 in this process and efficiently scrapes off the hardened sludge adhering to the mesh surface of the sludge discharge conveyor belt 12 by reciprocating scraping. At the same time, its flexible characteristics avoid the damage that the rigid scraper may cause to the mesh surface. The limiting rod 222 passes through the limiting groove 223 of the deflection block 221, and the limiting spring 224 continuously applies downward pressure to the deflection block 221 through the limiting ring 225 at its bottom end. This pressure is transmitted to the baffle 213, so that its upper edge is always tightly pressed against the lower surface of the sludge discharge conveyor belt 12. At the same time, the reciprocating scraper 214 and its baffle 213 are synchronously pressed against the outer surface of the sludge discharge conveyor belt 12, thereby forming a stable scraping base. When abnormally large or hard clumps occasionally appear on the sludge discharge conveyor belt 12, the pressure will cause the baffle 213 to overcome the spring force and adaptively retract, avoiding jamming or damage to the sludge discharge conveyor belt 12 or the cleaning mechanism 2.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular sludge low-temperature belt dryer, comprising a sludge dryer body (1), characterized in that: The sludge drying machine body (1) is provided with a sludge discharge conveyor belt (12) at its lower part, and a discharge chute (11) is provided at the lower part of the sludge drying machine body (1). A cleaning mechanism (2) is provided on one side of the sludge discharge conveyor belt (12) for scraping off the sludge attached to the sludge discharge conveyor belt (12). The cleaning mechanism (2) includes: The reciprocating assembly (21) includes a baffle (213) rotatably installed on one side of the lower part of the sludge dryer body (1). The upper part of the baffle (213) is in contact with one end of the sludge discharge conveyor belt (12). A reciprocating scraper (214) is provided on the upper surface of the baffle (213). A rotating shaft (215) is slidably passed through the middle of the baffle (213). Both ends of the lower part of the reciprocating scraper (214) are fixedly installed on both ends of the rotating shaft (215). A drive rod (216) is movably installed on one side of the lower part of the reciprocating scraper (214). A drive assembly is provided on one side of the drive rod (216). Adjustment components (22) are set at both ends of the baffle (213) and are used to adjust the angle of the baffle (213).

2. The modular sludge low-temperature belt dryer according to claim 1, characterized in that: The adjustment component (22) includes deflection blocks (221) fixedly installed at both ends of the baffle (213). Two symmetrically distributed limiting rods (222) are fixedly installed at the lower part of the sludge dryer body (1). Limiting springs (224) are fixedly installed at the upper part of the two limiting rods (222). Limiting rings (225) are fixedly installed at the bottom end of the two limiting springs (224). The limiting rings (225) are slidably sleeved on the outer surface of the limiting rods (222). The bottom end of the limiting rings (225) is in contact with the top end of the deflection blocks (221).

3. The modular sludge low-temperature belt dryer according to claim 1, characterized in that: The drive assembly includes a drive motor (211) fixedly installed on one side of the lower part of the sludge dryer body (1). A rotating disk (212) is fixedly installed on the drive end of the drive motor (211), and one end of the drive rod (216) is movably installed on one side of the rotating disk (212).

4. The modular sludge low-temperature belt dryer according to claim 1, characterized in that: Two symmetrically distributed limiting blocks (2151) are fixedly installed on the outer side of the rotating shaft (215), and both limiting blocks (2151) are slidably locked on the lower part of the baffle (213).

5. A modular sludge low-temperature belt dryer according to claim 1, characterized in that: A rubber strip (2141) is fixedly installed at the top of the reciprocating scraper (214), and the rubber strip (2141) is in contact with the upper surface of one side of the sludge conveyor belt (12).

6. A modular sludge low-temperature belt dryer according to claim 2, characterized in that: Each of the two deflection blocks (221) has a limiting groove (223) in the middle of one side, and the two limiting rods (222) are slidably locked in the middle of the limiting groove (223).

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