Layered and scattered sludge air-drying device

Abstract

The application discloses a layered and scattered sludge air-drying device and belongs to the technical field of sludge drying treatment. The device comprises a shell, a centrifugal feeding assembly is arranged in the middle of the shell, the centrifugal feeding assembly disperses and feeds out sludge through self-rotation, an opening is formed in the top of the shell, an air feeding assembly is arranged above the opening, and a material bin is fixedly connected to the bottom of the shell. The centrifugal feeding assembly is arranged in the middle of the shell, the centrifugal force generated by self-rotation of the assembly disperses and feeds out sludge, the agglomerated high-wet sludge is directly torn and dispersed, the effective surface area of the sludge receiving airflow is greatly improved, the drying efficiency is strengthened, the air-drying operation of the device does not need to depend on extremely high airflow temperature, and even the sludge can be fully dried without heating, energy consumption can be greatly reduced compared with a traditional high-temperature drying process, the drying period is shortened, and the treatment efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of sludge drying technology, specifically a layered, dispersing sludge air-drying device. Background Technology

[0002] Sludge drying is a core process for achieving sludge reduction, stabilization, and resource utilization. Air drying equipment removes moisture through mass transfer between airflow and sludge, and is a commonly used drying equipment in small and medium-sized sludge disposal scenarios. Its drying efficiency and operating energy consumption directly affect the overall cost of sludge disposal and its adaptability to different scenarios.

[0003] Existing sludge air drying equipment mostly adopts the hot air drying technology approach, which increases the mass transfer driving force by heating the airflow to accelerate the evaporation of moisture. The feeding method mostly adopts static layout forms such as spreading and extrusion, so that the sludge comes into contact with the hot air in a relatively intact form to complete the drying process. Some equipment will add simple stirring or turning structures to help improve the uniformity of drying.

[0004] However, the aforementioned air-drying equipment still has the following drawbacks: high-moisture, viscous sludge has strong self-agglomeration properties, and the gas-solid contact area of ​​the sludge is limited under static feeding, which limits the improvement of mass transfer efficiency. The industry usually relies on increasing the airflow temperature to ensure the drying effect, but this will lead to high energy consumption during equipment operation and requires corresponding heat source facilities, making it difficult to adapt to small-scale sludge treatment scenarios without waste heat resources, and the application flexibility is insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide a layered dispersing sludge air drying device to solve the problem in the prior art that relies on increasing the airflow temperature to ensure the drying effect when drying sludge, resulting in high energy consumption during equipment operation.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: a layered dispersing sludge air drying device, including a shell, a centrifugal feeding component is provided in the middle of the shell, the centrifugal feeding component disperses and sends out the sludge by rotating itself, an opening is provided at the top of the shell, an air supply component is provided above the opening, and a material bin is fixedly connected to the bottom of the shell.

[0007] Preferably, the centrifugal feeding assembly includes a feeding pipe, the feeding pipe is covered by a shaft sleeve, the shaft sleeve has a plurality of material inlets on its wall, the feeding pipe has a plurality of material feed holes on its wall, and one end of the feeding pipe is provided with a driving component for driving the shaft sleeve to rotate.

[0008] Preferably, a perforated sleeve is provided between the outer side of the feed pipe and the inner wall of the outer sleeve of the shaft, and the inside of the perforated sleeve has a plurality of equidistantly arranged loose material perforations.

[0009] Preferably, the centrifugal feeding assembly is provided with dispersing rollers on both the upper and lower sides. The dispersing rollers include several parallel retaining rings, and several equally spaced stiffeners are fixedly connected between adjacent retaining rings.

[0010] Preferably, a discharge vibrating screen is provided above the material silo, a mud-blocking assembly is provided below the outlet, the mud-blocking assembly includes a mud-collecting plate, and a material-blocking vibrating screen is provided below the mud-collecting plate.

[0011] Preferably, the sidewall of the material silo is inclined inward, and the sidewall of the material silo is provided with a plurality of ventilation slots, and the inner wall of each of the plurality of ventilation slots is fixedly connected with a dust baffle.

[0012] Preferably, both ends of the outer sleeve of the shaft are fixedly installed with end flanges, and a bearing seat is fixedly installed on one side of the two end flanges. A rotor bearing is fixedly installed inside the two bearing seats. One rotor bearing is rotatably installed at the end of the feed pipe near the feed end, and the end of the feed pipe away from the feed end is closed and rotatably installed inside the other rotor bearing.

[0013] Preferably, a drive shaft is fixedly installed in the middle of the end flange on the side away from the feed end, and the drive component includes a drive motor, which is connected to the output end of the drive shaft.

[0014] Preferably, the air supply assembly includes an air supply frame, a fan is fixedly installed on the top of the air supply frame, and a heating device for heating the airflow delivered by the fan is provided inside the air supply frame.

[0015] Preferably, a purging assembly is fixedly connected to the outer wall of the housing. The purging assembly includes an air inlet ring, and a plurality of air inlets are provided at the bottom of the inner wall of the air inlet ring. The inner walls of the plurality of air inlets are all fitted to the inner wall of the housing.

[0016] Preferably, a conveying pipe is fixedly connected to the feed end of the feed pipe, one end of the conveying pipe is connected to the output end of the sludge supply equipment, a return pipe is fixedly connected to one side of the bottom of the material bin, one end of the return pipe is connected to the conveying pipe, a material blowing component is fixedly installed in the middle of the return pipe, a discharge pipe is fixedly connected to the bottom center of the material bin, a discharge control valve is fixedly installed in the middle of the discharge pipe, and a feeding control valve is fixedly installed at the connection position between the return pipe and the conveying pipe.

[0017] Preferably, the material blowing assembly includes a blowing hood, and the bottom of the blowing hood is connected to a blower via a pipeline.

[0018] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention achieves low-energy sludge drying by setting a centrifugal feeding component in the middle of the shell, which, together with the top air supply component and the bottom material silo, forms a vertical air drying system. After the sludge is fed into the centrifugal feeding component, it is dispersed and sent out by the centrifugal force generated by the rotation of the component itself, which directly tears apart and disperses the agglomerated high-moisture sludge, thereby greatly increasing the effective surface area of ​​the sludge facing the airflow. This enhances the drying efficiency from the essential level of gas-solid mass transfer, so that the air drying operation of this device does not need to rely on extremely high airflow temperature, or even does not need to be heated at all, to achieve full drying of sludge. Compared with traditional high-temperature drying processes, it can significantly reduce energy consumption, shorten the drying cycle, and improve processing efficiency. 2. This invention addresses the problem that existing sludge drying equipment generally relies on high-temperature hot air for drying and has high energy consumption. It adopts a centrifugal rotary dispersing feeding method, which enhances the gas-solid mass transfer efficiency by increasing the specific surface area of ​​the material. This forms a technical solution for achieving efficient air drying at room temperature or low temperature, thus eliminating the dependence of sludge drying on high-temperature heat sources. 3. The present invention employs a layered centrifugal feeding assembly in conjunction with a dispersing roller and other structures to perform multi-stage shearing and dispersing of sludge, effectively improving the uniformity of particle size distribution after sludge drying and ensuring uniform drying; the upper and lower layered dispersing rollers match the parabolic motion trajectory of the sludge during the throwing process, causing the material to collide and disperse multiple times during the throwing and falling process, extending the gas-solid contact time; the side wall blowing assembly forms a wall-adhering air curtain, specifically solving the problem of material sticking to the wall of the device structure, ensuring stable output quality and long-term continuous operation of the equipment. Attached Figure Description

[0019] Figure 1 This is a front cross-sectional view of the present invention; Figure 2 This is a cross-sectional schematic diagram of the centrifugal feeding assembly of the present invention; Figure 3 This is the present invention. Figure 2 Enlarged schematic diagram of local structure A in the middle; Figure 4 This is the present invention. Figure 2 Enlarged schematic diagram of local structure B in the middle; Figure 5 This is a perspective view of the dispersing roller of the present invention; Figure 6 This is a schematic diagram of the structure of the shaft outer sleeve of the present invention; Figure 7 This is a cross-sectional schematic diagram of the feed pipe of the present invention; Figure 8 This is a schematic diagram of the material silo structure of the present invention.

[0020] Explanation of reference numerals in the attached figures: 101. Shell; 102. Material bin; 103. Air supply frame; 104. Air supply fan; 105. Material blocking vibrating screen; 106. Sludge collecting plate; 107. Discharge vibrating screen; 108. Dust baffle plate; 109. Discharge pipe; 110. Conveying pipe; 2. Centrifugal feeding assembly; 201. Feed pipe; 202. Shaft outer sleeve; 203. Material inlet; 204. Perforated sleeve; 205. End flange; 206. Drive shaft; 207. Feed hole; 3. Dispersing drum; 301. Retaining ring; 302. Rib plate; 401. Return pipe; 402. Discharge control valve; 403. Material blowing assembly; 404. Feeding control valve; 501. Air inlet ring; 502. Sweeping air outlet. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 Existing sludge air drying equipment generally adopts static feeding methods such as material spreading and extrusion. However, the high moisture and viscosity of sludge and its original agglomerated structure make it difficult to disperse. During air drying, the gas-solid contact area is small and the mass transfer efficiency is low. High-temperature hot air must be used to achieve the required drying, resulting in high energy loss and slow drying speed.

[0023] like Figures 1 to 8 In this embodiment, a layered dispersing sludge air drying device is provided, including a shell 101. A centrifugal feeding component 2 is provided in the middle of the shell 101. The centrifugal feeding component 2 disperses and sends out the sludge by rotating itself. An opening is provided at the top of the shell 101. An air supply component is provided above the opening. A material bin 102 is fixedly connected to the bottom of the shell 101.

[0024] The centrifugal feeding assembly 2 includes a feed pipe 201, an outer sleeve 202 covering the feed pipe 201, several feed ports 203 on the wall of the outer sleeve 202, and several feed holes 207 on the wall of the feed pipe 201. One end of the feed pipe 201 is equipped with a driving component for rotating the outer sleeve 202. Both ends of the outer sleeve 202 are fixedly mounted with end flanges 205. Bearing seats are fixedly mounted on one side of each end flange 205, and rotor bearings are fixedly mounted inside each bearing seat. One rotor bearing is rotatably mounted on the end of the feed pipe 201 near the feed end, while the end of the feed pipe 201 away from the feed end is closed and rotatably mounted inside the other rotor bearing. A drive shaft 206 is fixedly mounted in the middle of the end flange 205 on the side away from the feed end. The driving component includes a drive motor, which is connected to the output end of the drive shaft 206.

[0025] The air supply assembly includes an air supply frame 103, on the top of which an air supply fan 104 is fixedly mounted. The air supply frame 103 is equipped with a heating device for heating the airflow delivered by the air supply fan 104.

[0026] Its working principle is as follows: sludge is input from the feed end of feed pipe 201, and drive motor drives shaft sleeve 202 to rotate at high speed through drive shaft 206. Sludge enters the annular chamber before shaft sleeve 202 through feed hole 207 on feed pipe 201, and then diffuses radially outward under the action of rotational centrifugal force. Finally, it is dispersed and thrown out from feed port 203, forming fine particles that come into full contact with the airflow from top to bottom sent by top air supply component to complete air drying.

[0027] It should be emphasized that the core improvement of this embodiment lies in replacing the traditional static feeding mode with a centrifugal rotary dispersion feeding method. By directly tearing and breaking up the sludge agglomerate structure through centrifugal force, the surface area of ​​the sludge facing the airflow is greatly increased, which enhances the mass transfer process of water migration from the inside of the particles to the surface and then diffusion into the main airflow. This allows for efficient dehydration even at lower temperatures or even at room temperature airflow, relying on the huge mass transfer area and surface vapor pressure difference. This fundamentally reduces the dependence on high-temperature heat sources, reduces energy loss, and increases the drying speed.

[0028] It should be noted that the heating device of the dispensing component in this embodiment is an optional configuration, which can be flexibly enabled or disabled according to the on-site heat source conditions, and is suitable for various working conditions such as normal temperature air drying and low temperature hot air drying.

[0029] It should be noted that, such as Figures 2-4 The feed pipe 201 is fixed and the shaft sleeve 202 is rotatable. The two ends of the shaft sleeve 202 are equipped with sealing devices at the connection with the housing 101. The specific structure of the sealing devices is implemented with reference to existing technical means to avoid the problem of leakage and blockage of high-moisture viscous sludge and improve the reliability of equipment operation.

[0030] It should be noted that by adjusting the speed of the drive motor, the magnitude of the centrifugal force can be controlled, thereby actively regulating the initial speed of the material thrown out from the feed inlet 203, and thus adjusting the particle size distribution and packing porosity of the sludge.

[0031] Example 2 It is understandable that in Example 1, relying solely on the feeding pipe 201 and the single-stage centrifugal structure of the shaft outer sleeve 202, the shearing and dispersing degree of high-viscosity sludge is limited, the sludge particles thrown out have a wide particle size distribution, and the internal drying of large sludge particles is insufficient; moreover, the particles settle rapidly after passing through the airflow zone once, the gas-solid contact time is short, and the drying uniformity is insufficient.

[0032] like Figures 2 to 4To address the aforementioned issues, a perforated sleeve 204 is provided between the outer side of the feed pipe 201 and the inner wall of the shaft sleeve 202. The perforated sleeve 204 has several equally spaced perforations for loose material. Dispersing rollers 3 are provided on both the upper and lower sides of the centrifugal feed assembly 2. Each dispersing roller 3 includes several parallel retaining rings 301, and several equally spaced reinforcing ribs 302 are fixedly connected between adjacent retaining rings 301. A mud-blocking assembly is provided below the opening, including a mud-collecting plate 106. A material-blocking vibrating screen 105 is provided below the mud-collecting plate 106.

[0033] It should be emphasized that the core improvement of this embodiment lies in: utilizing the perforated sleeve 204 to form a two-stage shearing process, gradually tearing and refining the sludge, and narrowing the particle size distribution; due to the vertical shell 101 of this application and the layout of the feed position in the middle of the device, when the material being rotated and thrown impacts the dispersing roller 3 located above the centrifugal feed assembly at high speed, some particles will gain upward rebound momentum, forming a trajectory of first moving upward, and then settling downward under the action of gravity and downward airflow. In this embodiment, the two dispersing rollers 3 are located on the upper and lower sides of the feed assembly, respectively. The material being rotated and thrown upward can contact the dispersing roller 3 multiple times during the throwing and falling process, achieving multi-stage dispersal through the cutting of the rib plate 302 and the collision of the baffle ring 301, while slowing down the particle settling speed and prolonging the gas-solid contact time; the mud-blocking assembly intercepts the material carried upward, preventing the material from escaping with the airflow.

[0034] It should be noted that, such as Figure 5 The dispersing roller 3 adopts a grid structure combining a retaining ring 301 and a rib plate 302, which retains the airflow channel while achieving collision dispersal, thus balancing the dispersal effect and airflow.

[0035] It should be noted that, such as Figure 1 The vibrating screen 105 can shake off the intercepted sludge through continuous micro-vibration, avoiding screen clogging and achieving full material recovery. In specific implementation, a vibration source can also be independently set on the shell 101 or the dispersing drum 3 for active dust removal to prevent material adhesion.

[0036] It should be noted that the bulk material punching of the punched sleeve 204 is preferably a conical hole with a large inlet and a small outlet, or a structure with a sharp cutting edge at the hole edge. When sludge passes through at a high shear rate, it can effectively overcome its high viscosity and yield stress, avoiding the squeezing and clogging phenomenon that is easily caused by traditional round holes.

[0037] Example 3 It is understandable that in Embodiment 2, the combined effect of the radial throwing of the centrifugal feeding component 2 and the collision rebound of the dispersing roller 3 will cause a large number of sludge particles to be thrown towards the inner wall of the surrounding shell 101. Moreover, the sludge is highly sticky under high humidity conditions, and it is very easy for it to adhere to the side wall and accumulate and gradually thicken. Long-term operation will occupy the space of the drying chamber, block the airflow channel, and even cause clumps to fall off, affecting the dispersing effect, making it impossible for the equipment to achieve long-term continuous operation.

[0038] like Figure 1 To address the aforementioned issues, based on Embodiment 2, a purging assembly is fixedly connected to the outer wall of the housing 101. The purging assembly includes an air inlet ring 501, with several purging ports 502 formed at the bottom of its inner wall. The inner walls of these purging ports 502 are all fitted against the inner wall of the housing 101. The bottom of the air inlet ring 501 can be connected to an external compressed air source or an independent fan via a pipeline. It should be emphasized that the core improvement of this embodiment is that: by blowing air downwards through the air vent 502 against the inner wall of the housing 101, a continuous wall-adhering air film is formed, which prevents the sludge ejected from the core from directly contacting the inner wall of the housing 101, alleviates the problem of material accumulation on the side wall, and extends the continuous operation cycle of the equipment; at the same time, the wall-adhering airflow can carry away the high-humidity air near the wall surface, eliminate the drying dead corners at the edge of the chamber, and further improve the drying uniformity.

[0039] Example 4 It is understandable that in Example 3, the downward airflow carries water vapor, and its flow rate drops sharply after reaching the bottom material silo 102, which easily forms a high-humidity stagnation zone in the silo. This causes the dried fine particles to absorb water vapor and become damp again, thus negating the drying effect. At the same time, the sludge particles after multi-stage dispersion and drying still have differences in particle size and moisture content. Directly falling into the material silo 102 for mixed discharge will result in large fluctuations in the final discharge quality, which cannot stably meet the requirements of subsequent treatment.

[0040] like Figure 1 and Figure 8 To address the aforementioned issues, based on Embodiment 3, a discharge vibrating screen 107 is installed above the material silo 102. The sidewalls of the material silo 102 are inclined inwards, and several ventilation slots are provided on the sidewalls of the material silo. Dust baffles 108 are fixedly connected to the inner walls of the ventilation slots, and the dust baffles 108 are inclined inwards.

[0041] It should be emphasized that the core improvement of this embodiment is: by combining the side wall ventilation grooves with the top air supply to form a through airflow field of top delivery and side discharge, the high humidity stagnation zone at the bottom is completely eliminated, and the dried material is prevented from becoming damp again; the discharge vibrating screen 107 classifies the dried material by particle size, intercepts large wet particles, and the qualified dry material under the screen enters the material silo 102, which ensures the uniformity of the discharge particle size and moisture content from a physical perspective; the inclined side wall allows the material to smoothly gather to the bottom by its own weight, without any dead corners for material accumulation.

[0042] It should be noted that the ventilation channel, together with the dust baffle 108, forms a baffle dust removal structure, allowing airflow to be discharged normally. Sludge particles will be intercepted by the dust baffle 108 and fall back into the silo. The side wall of the material silo 102 is inclined inward, so solid materials only accumulate in the bottom area of ​​the silo. The ventilation channel and the solid material discharge channel are independent of each other, and the exhaust will not interfere with the normal discharge operation of the bottom discharge pipe.

[0043] Example 5 It is understandable that, in Example 1, single-pass drying is difficult to reliably ensure that the output moisture content meets the standard. Especially for feed sludge with high viscosity and high moisture content, one-time drying is often insufficient, and direct discharge cannot meet the subsequent treatment standards, making it difficult to balance material processing efficiency and quality.

[0044] like Figure 1 To address the aforementioned issues, a conveying pipe 110 is fixedly connected to the inlet end of the feed pipe 201. One end of the conveying pipe 110 is connected to the output end of the sludge supply equipment. A return pipe 401 is fixedly connected to one side of the bottom of the material silo 102. One end of the return pipe 401 is connected to the conveying pipe 110. A material blowing assembly 403 is fixedly installed in the middle of the return pipe 401. A discharge pipe 109 is fixedly connected to the center of the bottom of the material silo 102. A discharge control valve 402 is fixedly installed in the middle of the discharge pipe 109. A feeding control valve 404 is fixedly installed at the connection point between the return pipe 401 and the conveying pipe 110. Both the feeding control valve 404 and the discharge control valve 402 are three-way directional valves. The material blowing assembly 403 includes a blowing hood, the bottom of which is connected to a blower via a pipeline.

[0045] It should be emphasized that the core improvement of this embodiment is: to construct a circulating reciprocating drying system, and to repeatedly transport the wet material back to the feed end through the return pipe 401, so that it re-enters the dispersing and drying process, ensuring that the final output moisture content is stable and meets the standard.

[0046] It should be noted that by adjusting the opening of the discharge control valve 402 and the feeding control valve 404, the return ratio and discharge amount can be flexibly controlled to adapt to different feed moisture content and discharge standard requirements. In specific implementation, the sludge can be dried a specified number of times according to the preset cycle number. Alternatively, external sampling or real-time monitoring equipment can be used to monitor the sludge moisture content, and the sludge drying cycle can be terminated when the moisture content meets the requirements.

[0047] The working principle of this device is as follows: The sludge enters the feed pipe 201 of the centrifugal feeding assembly 2 through the conveying pipe 110. The drive motor drives the outer sleeve 202 and the internal perforated sleeve 204 to rotate synchronously through the drive shaft 206. The sludge enters each layer of annular chamber through the feed hole 207 on the wall of the feed pipe 201 and the bulk material punch of the perforated sleeve 204 in sequence. Finally, under the action of centrifugal force, it is dispersed and thrown out radially from the feed port 203 of the outer sleeve 202.

[0048] The sludge ejected by centrifugation moves in both upward and downward directions, successively impacting the dispersing rollers 3 on both sides of the centrifugal feeding assembly 2. After being further dispersed by the collision and cutting of the baffle ring 301 and the rib plate 302, it then settles to the bottom. The fan 104 of the top air supply assembly sends airflow downward, which passes through the upper dispersing roller 3, the drying chamber and the lower dispersing roller 3 from top to bottom, making full contact with the moving sludge particles and removing moisture. The sludge collecting plate 106 below the top opening of the shell 101 and the baffle vibrating screen 105 intercept the sludge particles carried upward by the airflow, and the intercepted material falls back into the drying chamber by vibration.

[0049] The purging assembly on the outer wall of the housing 101 introduces airflow through the air inlet ring 501, and blows the airflow along the inner wall of the housing 101 through the purging port 502 to prevent sludge particles from directly contacting the inner wall of the housing 101. The dried sludge particles fall onto the discharge vibrating screen 107 above the material silo 102. After screening, the particles fall into the material silo 102. The discharge control valve 402 is connected to the return pipe 401. The blower of the material blowing assembly 403 generates a conveying airflow, which drives the material to be conveyed along the return pipe 401 to the conveying pipe 110. The material then enters the feed pipe 201 of the centrifugal feeding assembly 2 for circulation. After a predetermined number of cycles of drying, the discharge control valve 402 is connected to open the discharge pipe 109. The qualified dry material in the material silo 102 is discharged outward through the discharge pipe 109 at the bottom.

[0050] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A layered, dispersing sludge air-drying device, characterized in that, Includes a housing (101), a centrifugal feeding assembly (2) is provided in the middle of the housing (101), the centrifugal feeding assembly (2) disperses and sends out sludge by rotating itself, an opening is provided at the top of the housing (101), an air supply assembly is provided above the opening, and a material bin (102) is fixedly connected to the bottom of the housing (101).

2. The layered dispersing sludge drying equipment as described in claim 1, characterized in that, The centrifugal feeding assembly (2) includes a feeding pipe (201), the outside of which is covered by a shaft sleeve (202), the shaft sleeve (202) has several material inlets (203) on its wall, the feeding pipe (201) has several feeding holes (207) on its wall, and one end of the feeding pipe (201) is provided with a driving component for driving the shaft sleeve (202) to rotate.

3. The layered dispersing sludge drying equipment as described in claim 2, characterized in that, A punched sleeve (204) is provided between the outer side of the feed pipe (201) and the inner wall of the shaft sleeve (202), and the inside of the punched sleeve (204) has a number of equidistantly arranged loose material punches.

4. The layered dispersing sludge air drying equipment as described in claim 3, characterized in that, The centrifugal feeding assembly (2) is provided with dispersing rollers (3) on both the upper and lower sides. The dispersing rollers (3) include several parallel retaining rings (301), and several equally spaced stiffeners (302) are fixedly connected between adjacent retaining rings (301).

5. A layered, dispersing sludge drying device as described in claim 1, characterized in that, A discharge vibrating screen (107) is provided above the material bin (102); a mud-blocking assembly is provided below the opening, the mud-blocking assembly includes a mud-collecting plate (106), and a material-blocking vibrating screen (105) is provided below the mud-collecting plate (106).

6. The layered dispersing sludge air drying equipment as described in claim 1, characterized in that, The outer wall of the housing (101) is fixedly connected to a purging assembly, which includes an air inlet ring (501). The bottom of the inner wall of the air inlet ring (501) is provided with a plurality of air purging ports (502), and the inner walls of the plurality of air purging ports (502) are all fitted to the inner wall of the housing (101).

7. A layered, dispersing sludge drying device as described in claim 2, characterized in that, The feed pipe (201) is fixedly connected to the feed end of the feed pipe (110), one end of the feed pipe (110) is connected to the output end of the sludge supply equipment, the bottom side of the material bin (102) is fixedly connected to the return pipe (401), one end of the return pipe (401) is connected to the feed pipe (110), the middle of the return pipe (401) is fixedly installed with a material blowing assembly (403), the bottom center of the material bin (102) is fixedly connected to the discharge pipe (109), the middle of the discharge pipe (109) is fixedly installed with a discharge control valve (402), and the connection position between the return pipe (401) and the feed pipe (110) is fixedly installed with a feeding control valve (404).

8. The layered dispersing sludge drying equipment as described in claim 1, characterized in that, The air supply assembly includes an air supply frame (103), on the top of which is a fan (104) fixedly mounted. The air supply frame (103) is provided with a heating device for heating the airflow delivered by the fan (104).

9. A layered, dispersing sludge drying device as described in claim 2, characterized in that, Both ends of the outer sleeve (202) are fixedly installed with end flanges (205), and a bearing seat is fixedly installed on one side of the two end flanges (205). A rotor bearing is fixedly installed inside the two bearing seats. One rotor bearing is rotatably installed at the end of the feed pipe (201) near the feed end, and the end of the feed pipe (201) away from the feed end is closed and rotatably installed inside the other rotor bearing.

10. A layered, dispersing sludge drying device as described in claim 7, characterized in that, The material blowing assembly (403) includes a blowing hood, the bottom of which is connected to a blower via a pipe.

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