Sludge recycling and dewatering device

Abstract

The utility model relates to the field of sludge treatment, in particular to a sludge recycling and dewatering device which comprises an outer filter cartridge coaxially mounted in a dewatering barrel, and the outer filter cartridge is driven by a power source to rotate so as to drive sludge to be centrifugally dewatered; the mud discharging pipe is inserted into the outer filter cylinder in the axial direction, a thick screen covers a mud discharging opening of the mud discharging pipe, at least three sets of fixing points are evenly arranged on the surface of the thick screen in the circumferential direction, take-up wheels corresponding to the fixing points of the thick screen in number are arranged on the mud discharging pipe, and the take-up wheels are correspondingly connected with the fixing points of the thick screen through pull wires. The take-up wheels wind the pull wires in sequence so as to drive the net face of the coarse screen to incline. Solid particles in sludge entering the filter cylinder are primarily screened through the filter screen, the filter cylinder is prevented from being damaged by the particles, meanwhile, the sludge is prevented from being accumulated on the filter screen, and the dewatering efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sludge treatment, and specifically relates to a sludge recycling and dewatering device. BACKGROUND

[0002] Municipal pipelines bear the important task of urban drainage. With the continuous development of cities and the growth of population, the amount of drainage is increasing, and the sludge in the pipelines is also increasing. If the sludge is not discharged and treated regularly, it will gradually accumulate in the pipelines, causing pipeline blockage. The sludge contains a large amount of harmful substances such as organic matter, inorganic matter, heavy metals, and pathogens. If the sludge is left in the pipeline for a long time, it will not only cause corrosion of the pipeline, but also enter the soil and groundwater through leakage, causing pollution to the ecological environment. If the discharged sludge is not treated before being discharged into the environment, it will cause serious pollution to the environment. Therefore, after sludge recovery, it is usually necessary to perform dewatering treatment to reduce the water content of the sludge, reduce the volume of the sludge, reduce the storage space of the sludge, reduce the transportation cost of the sludge, and improve the composition and properties of the sludge.

[0003] To achieve the recycling and dewatering of sludge, the existing sludge treatment device as described in Publication No. "CN115253456A" adds the sludge to be treated into a centrifugal cylinder, starts the driving device, and drives the centrifugal cylinder to rotate after transmission through the transmission device. When the centrifugal cylinder rotates, the water in the sludge gradually enters the filter cavity under the action of centrifugal force, achieving dewatering of the sludge. Although the sludge in the municipal pipeline has been preliminarily screened for solid objects such as branches during the recycling process, the mixed particles such as stones in the sludge cannot be well removed. During the process of centrifugal dewatering, the mixed solid particles such as stones in the sludge enter the centrifugal cylinder with the sludge, and the particles are easily damaged to the centrifugal cylinder during high-speed centrifugal rotation and block or damage the filter holes of the centrifugal cylinder, thus requiring urgent solution. SUMMARY

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a sludge recycling and dewatering device. The utility model preliminarily screens the solid particles in the sludge entering the filter cylinder through the filter screen, avoids damage to the filter cylinder by the particles, and also avoids accumulation of the sludge on the filter screen, with high dewatering efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A sludge recovery and dewatering device comprises an outer filter cylinder coaxially installed in a dewatering cylinder, the outer filter cylinder is driven to rotate by a power source to drive the sludge to be centrifugally dehydrated; a sludge discharge pipe is axially inserted into the outer filter cylinder, and the outer cover of the sludge discharge port of the sludge discharge pipe is provided with a coarse screen, at least three groups of fixed points are evenly arranged on the upper edge of the coarse screen in the circumferential direction, and the sludge discharge pipe is provided with a take-up wheel corresponding to the number of fixed points of the coarse screen, each take-up wheel is connected to the fixed point of the coarse screen through a traction line, and each take-up wheel reels the traction line in turn to drive the mesh surface of the coarse screen to produce a tilting action.

[0007] As a further solution of the present invention: a guide cover for supporting the coarse screen is provided at the pipe mouth of the mud discharge pipe, the guide cover is a trumpet-shaped structure with an opening downward, the fixing point of the coarse screen is a traction ring located above the guide cover, and the traction line on the take-up wheel is arranged on the traction ring.

[0008] As a further solution of the present invention: the top of the outer filter barrel is open, and the opening is closed by the outer filter barrel cover body. The mud discharge pipe passes through the outer filter barrel cover body axially and is inserted into the barrel cavity of the outer filter barrel. The power source is a driving motor fixed at the bottom of the dehydration barrel, and the driving motor drives the outer filter barrel and the dehydration barrel to rotate coaxially.

[0009] As a further solution of the present invention, the outer filter cartridge cover is symmetrically divided into two halves and is folded together to form a cover.

[0010] As a further solution of the present invention: an inner filter cartridge with an open top is coaxially arranged inside the outer filter cartridge, a positioning pin is vertically arranged at the bottom of the outer filter cartridge, and the inner filter cartridge is vertically plugged into and positioned with the outer filter cartridge through the positioning pin; the inner filter cartridge and the outer filter cartridge cylinder bodies are arranged in close proximity, and the filter holes on the cylinder bodies are positioned correspondingly.

[0011] As a further solution of the present invention: a dehydration cylinder cover is provided at the top opening of the dehydration cylinder, and the dehydration cylinder cover is symmetrically divided into two halves and formed into a cover when closed; a drainage pipe for outward drainage is installed at the bottom of the dehydration cylinder.

[0012] As a further solution of the present invention: a thermal resistance heating network is provided on the inner wall of the dehydration cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model unfolds the coarse screen through the guide cover. The sludge discharged from the sludge discharge pipe is first screened through the coarse screen before entering the inner filter cylinder. To prevent sludge from accumulating and clogging in the center of the coarse screen, the take-up wheel can drive the coarse screen to tilt in one direction through the traction ring when winding the traction line. Each take-up wheel takes up and releases the line in turn, which can drive the sludge in the coarse screen to tilt in different directions, thereby evenly spreading the filtration and performing the initial screening of the particles in the sludge entering the filter cylinder. This prevents the particles from damaging the filter cylinder and also prevents the sludge from accumulating on the filter, resulting in high dehydration efficiency.

[0015] 2. The setting of the outer filter cartridge cover of the utility model can prevent the sludge from being thrown out during centrifugal dehydration. The filter holes on the outer filter cartridge correspond to those on the inner filter cartridge, and the cartridge bodies are arranged in close contact with each other. After dehydration and removal of the cover of the outer filter cartridge, the inner filter cartridge with sludge can be directly pulled out from the outer filter cartridge, making disassembly and sewage discharge simple.

[0016] 3. The inner filter cartridge and the outer filter cartridge of the utility model are plugged together by a pin, which can realize the rapid positioning and installation of the two filter cartridges; the setting of the thermal resistance heating network on the inner wall of the dehydration cartridge can effectively accelerate the dehydration rate of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] In the picture:

[0019] 1. Dehydration drum; 11. Dehydration drum cover; 12. Drain pipe; 13. Drive motor;

[0020] 2. External filter cartridge; 21. External filter cartridge cover; 22. Positioning pin;

[0021] 3. Inner filter cartridge; 4. Mud discharge pipe; 41. Take-up wheel; 42. Guide cover;

[0022] 5. Coarse screen; 51. Traction ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1In an embodiment of the utility model, a sludge recovery and dehydration device includes a dehydration cylinder 1. The top of the dehydration cylinder 1 is open, and a dehydration cylinder cover 11 symmetrically divided into half parts is provided at the opening. The dehydration cylinder cover 11 is buckled on the dehydration cylinder 1 after being closed. The detachable setting of the cover facilitates the disassembly and assembly of the filter cylinder.

[0025] The outer filter cartridge 2 is coaxially mounted at the bottom of the dehydration drum 1 and rotates coaxially with the drum via bearings. A drive motor 13 is coaxially mounted at the bottom of the drum 1. This motor acts as a power source to rotate the outer filter cartridge 2 within the drum, dehydrating the sludge through the centrifugal force of rotation. After centrifugal dehydration, the wastewater passes through the pores of the outer filter cartridge 2 and enters the annular space between them. It is then discharged through a drain pipe 12 arranged horizontally at the bottom of the drum 1.

[0026] During the centrifugal dehydration, the inner wall of the dehydration cylinder 1 is also provided with a thermal resistance type heating network, the height of the heating network corresponds to the height of the outer filter cylinder 2, and the sludge dehydration is accelerated by drying.

[0027] To prevent sludge from being thrown out during centrifugal dewatering, the top opening of the outer filter drum 2 is equipped with a symmetrically split outer filter drum cover 21. This outer filter drum cover 21 is identical to the dewatering drum cover 11, also a split cover. The sludge discharge pipe 4 passes axially through the dewatering drum cover 11 and the outer filter drum cover 21 along the dewatering drum 1, then transports the sludge into the outer filter drum 2.

[0028] To facilitate sludge discharge after dewatering, an inner filter cartridge 3 with an open top is coaxially mounted within the outer filter cartridge 2. Positioning pins 22 are uniformly and vertically positioned along the circumference of the bottom of the outer filter cartridge 2. The inner filter cartridge 3 engages with the outer filter cartridge 2 via these pins, driving the outer filter cartridge 2 to rotate synchronously. The filter holes on the outer and inner filter cartridges 2 and 3 correspond, and their bodies fit snugly together. After dehydration and removal of the cover of the outer filter cartridge 2, the inner filter cartridge 3, laden with sludge, can be directly removed from the outer filter cartridge 2, simplifying disassembly and drainage.

[0029] In order to achieve coarse filtration of the sludge, a guide cover 42 is provided at the mouth of the mud discharge pipe 4 located in the inner filter barrel 3. The guide cover 42 opens downward and is in the shape of a trumpet. The outer cover of the guide cover 42 is provided with a coarse screen 5. The coarse screen 5 is unfolded through the guide cover 42. The sludge discharged from the mud discharge pipe 4 is first screened through the coarse screen 5 before entering the inner filter barrel 3. In order to prevent the sludge from accumulating and clogging in the center of the coarse screen 5, traction rings 51 are evenly provided at the edges of the mesh surface of the coarse screen 5. The traction rings 51 are arranged above the guide cover 42. In this embodiment, the number of traction rings 51 is preferably four groups. The outer ring of the mud discharge pipe 4 is circumferentially provided with a corresponding number of take-up wheels 41, which have a built-in power source. The traction rings 51 are connected to the take-up wheels 41 through a traction line tied to the ring body. When the take-up wheel 41 reels in the traction line, the coarse screen 5 can be driven to tilt in one direction through the traction ring 51. Each take-up wheel 41 takes in and releases the line in turn, which can drive the sludge in the coarse screen 5 to flow in different directions, thereby evenly spreading the filtration and avoiding local accumulation on the coarse screen 5.

[0030] During operation, the sludge injection height in the inner filter cartridge 3 usually does not exceed 80% of the height of the inner filter cartridge 3 . During the centrifugal process, the sludge in the inner filter cartridge 3 is located below the coarse filter screen 5 .

[0031] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0032] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

Claims

1. A sludge recovery and dehydration device, characterized in that: The invention comprises an outer filter cylinder (2) coaxially installed in a dewatering cylinder (1), wherein the outer filter cylinder (2) is driven to rotate by a power source to drive the centrifugal dewatering of sludge; a mud discharge pipe (4) is axially inserted into the outer filter cylinder (2), and a mud discharge port outer cover of the mud discharge pipe (4) is provided with a coarse screen (5), and at least three groups of fixed points are evenly arranged on the mesh surface of the coarse screen (5) along the circumferential direction; a take-up wheel (41) corresponding to the number of the fixed points of the coarse screen (5) is provided on the mud discharge pipe (4), and each take-up wheel (41) is connected to the fixed point of the coarse screen (5) through a traction line, and each take-up wheel (41) reels the traction line in turn to drive the mesh surface of the coarse screen (5) to produce a tilting action.

2. A sludge recovery and dewatering device according to claim 1, characterized in that: A guide cover (42) for holding open the coarse screen (5) is provided at the mouth of the mud discharge pipe (4). The guide cover (42) is in a trumpet-shaped structure with an opening facing downward. The coarse screen (5) is fixed at a traction ring (51) located above the guide cover (42). The traction line on the take-up wheel (41) is arranged on the traction ring (51).

3. A sludge recovery and dewatering device according to claim 1 or 2, characterized in that: The outer filter barrel (2) has an opening at the top, and the opening is sealed by an outer filter barrel cover plate (21). The mud discharge pipe (4) passes through the outer filter barrel cover plate (21) in the axial direction and is inserted into the barrel cavity of the outer filter barrel (2). The power source is a drive motor (13) fixed to the bottom of the dehydration barrel (1). The drive motor (13) drives the outer filter barrel (2) and the dehydration barrel (1) to rotate coaxially.

4. The sludge recovery and dewatering device according to claim 3, characterized in that: The outer filter cartridge cover plate (21) is symmetrically arranged in half and forms a cover body after being closed.

5. A sludge recovery and dewatering device according to claim 1 or 2, characterized in that: An inner filter cartridge (3) with an open top is coaxially arranged inside the outer filter cartridge (2); a positioning pin (22) is vertically arranged at the bottom of the outer filter cartridge (2); the inner filter cartridge (3) is vertically plugged and positioned with the outer filter cartridge (2) via the positioning pin (22); the inner filter cartridge (3) and the outer filter cartridge (2) are arranged in close contact with each other, and the filter holes on the cartridges correspond to each other.

6. A sludge recovery and dewatering device according to claim 1 or 2, characterized in that: The dehydration cylinder (1) is provided with a dehydration cylinder cover (11) at the top opening. The dehydration cylinder cover (11) is symmetrically divided into two halves and formed into a cover when closed. A drainage pipe (12) for draining water outward is installed at the bottom of the dehydration cylinder (1).

7. A sludge recovery and dewatering device according to claim 1 or 2, characterized in that: The inner wall of the dehydration cylinder (1) is provided with a thermal resistance heating network.

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