Sludge dewatering device
By designing a sludge dewatering device that includes a support frame and a drive assembly, and using an electric motor-driven conveying screw and a squeezing screw to continuously compress the sludge, the high cost problem of long-distance sludge treatment is solved, and efficient sludge dewatering and environmental protection are achieved.
Patent Information
- Application Number
- CN202520325302.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-27
AI Technical Summary
In existing technologies, there is a lack of convenient dewatering equipment for the treatment of sludge from abandoned factories and rivers in remote areas, resulting in high treatment costs and environmental pollution caused by untreated sludge.
A sludge dewatering device was designed, comprising a support frame, a drive assembly, a dewatering structure, an inlet, an outlet, a liquid collection tank, and a support frame. The device utilizes a conveying screw and a squeezing screw driven by an electric motor to continuously squeeze the sludge. Liquid flows into the liquid collection tank through a drain hole, while solid sludge is discharged from the outlet.
It achieves efficient and convenient sludge dewatering, reduces treatment costs and environmental pollution, and is suitable for use in the field and on engineering vehicles.
Smart Images
Figure CN223892617U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sludge dewatering technology, and in particular to a sludge dewatering device. Background Technology
[0002] Wastewater treatment generates a certain amount of sludge, which typically accounts for only about 0.4% of the treated wastewater volume. However, sludge treatment costs usually account for about 30% or even more of the total wastewater treatment cost. If untreated sludge is released directly into the environment, it will cause secondary pollution to water bodies and the atmosphere, reducing the effectiveness of wastewater treatment.
[0003] When treating sludge containing excessive levels of heavy metals, organic matter, and other harmful substances, dewatering is typically required to remove water present between and within sludge particles. This transforms the liquid sludge into a semi-solid sludge cake, facilitating the separate transportation and further treatment of wastewater and the sludge cake. While wastewater treatment plants possess relatively complete wastewater treatment and dewatering equipment, projects involving the treatment of sludge from abandoned factories or rivers often face challenges due to the distance from treatment plants. In such cases, sludge dewatering is inconvenient, and sludge is usually transported directly to the treatment plant, resulting in high processing costs. Summary of the Invention
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a sludge dewatering device that can dewater sludge. It has a simple structure, is easy to use, and has a good dewatering effect.
[0005] This utility model adopts the following technical solution: a sludge dewatering device, including: a support frame, a drive assembly, a compression dewatering structure, a feed inlet, a discharge outlet, a liquid collection tank, a fixing sleeve, and a bracket. The drive assembly is fixed on the support frame, the compression dewatering structure is located at the upper end of the support frame, and the bracket is fixed at the upper end of the support frame. One end of the compression dewatering structure is connected to the drive assembly, and the other end of the compression dewatering structure is fixed to the upper end of the bracket through the fixing sleeve. The feed inlet is located at the upper front end of the compression dewatering structure, and the discharge outlet is located at the lower rear end of the compression dewatering structure. The liquid collection tank is fixed on the support frame and is located below the feed inlet. Sludge is poured into the compression dewatering structure from the feed inlet. The drive assembly is used to drive the compression dewatering structure to dewater the sludge. The liquid extracted from the sludge flows into the liquid collection tank from the bottom front end of the compression dewatering structure for collection. The dehydrated sludge is discharged from the discharge outlet.
[0006] Furthermore, the extrusion dewatering structure includes a conveying screw shaft, an extrusion screw shaft, a conveying screw, a conveying housing, a drain hole, a transition housing, an extrusion housing, an extrusion screw, and a bearing end cap. The conveying housing, transition housing, and extrusion housing are arranged sequentially from front to back and are sealed together by flanges. The bottom of the conveying housing has a drain hole. The rear end of the conveying screw shaft is connected and fixed to the front end of the extrusion screw shaft, and the two are coaxially arranged. The bearing end cap is fixed to the rear end of the extrusion housing. The rear end of the extrusion screw shaft is fixed in the bearing end cap by a bearing. The conveying screw shaft is located inside the conveying housing, and the extrusion screw shaft is located inside the extrusion housing. The connection between the conveying screw shaft and the extrusion screw shaft is located inside the transition housing. The conveying screw is fixed to the outside of the conveying screw shaft, and the extrusion screw is fixed to the outside of the extrusion screw shaft.
[0007] Furthermore, the conveying screw shaft is cylindrical, and the front part of the extrusion screw shaft is cylindrical with the same diameter as the conveying screw shaft. The rear diameter of the extrusion screw shaft gradually increases, so that the space between the extrusion screw shaft and the inner wall of the extrusion shell gradually decreases.
[0008] Furthermore, the drive assembly includes a motor, a main pulley, a transmission belt, a driven pulley, and a reducer. The motor is fixed inside the support frame, the main pulley is fixed to the drive end of the motor, the reducer is fixed to the upper end of the support frame, and the driven pulley is fixed to the drive shaft of the reducer. The main pulley and the driven pulley are connected by several transmission belts. The front end of the conveying screw shaft is connected to the driven shaft of the reducer. A connecting cylinder is fixed inside the reducer at its driven shaft, and the front end of the conveying housing is connected to the connecting cylinder by a flange.
[0009] Furthermore, the support frame is symmetrically fixed with several feet at its bottom end, and the feet are provided with mounting holes.
[0010] Furthermore, several protective plates are fixed to the outer side of the support frame at the outer end of the motor.
[0011] Furthermore, a protective cover is provided on the outer side of the transmission belt, and the protective cover is installed on the upper end of the support frame.
[0012] Furthermore, the transition shell is conical, with the front diameter being larger than the rear diameter.
[0013] Furthermore, a drain pipe is connected to the bottom of the liquid pool.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] 1. The present invention relates to a sludge dewatering device in which the sludge to be dewatered is discharged from the feed inlet into the conveying shell and subjected to continuous compression as it passes through the transition shell and the extrusion shell. The liquid extracted from the sludge flows out through the water leakage hole, and the sludge cake after dewatering is discharged from the discharge outlet. It can continuously dewater the sludge, has a simple overall structure, is easy to use, and has high dewatering efficiency and good effect.
[0016] 2. The sludge dewatering device of this utility model is designed with a conical transition shell and a gradually increasing rear diameter of the extrusion screw shaft, so that the space between the shaft and the shell gradually decreases, thereby continuously extruding the sludge and removing the liquid from the sludge. It has a reliable structure and high liquid removal efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of the sludge dewatering device of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of this utility model after removing the protective plate, bracket, and protective cover;
[0019] Figure 3 This is a schematic diagram showing the structural connection between the drive assembly and the extrusion dehydration structure in this utility model;
[0020] Figure 4 This is a top view of the extrusion dehydration structure in this utility model;
[0021] Figure 5 yes Figure 4 A sectional view along line AA.
[0022] In the diagram: Drive assembly - 2; Extrusion dewatering structure - 3; Feed inlet - 4; Discharge outlet - 5; Liquid collection tank - 6; Drain pipe - 7; Fixing sleeve - 8; Bracket - 9; Support frame - 11; Foot - 12; Guard plate - 13; Protective cover - 14; Motor - 21; Main pulley - 22; Transmission belt - 23; Driven pulley - 24; Reducer - 25; Connecting cylinder - 30; Conveying screw shaft - 31; Extrusion screw shaft - 32; Conveying screw - 33; Conveying outer shell - 35; Drain hole - 36; Transition outer shell - 37; Extrusion outer shell - 38; Extrusion screw - 39; Bearing end cap - 310. Detailed Implementation
[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0024] The purpose of this invention is to address the shortcomings of existing technologies by providing a sludge dewatering device.
[0025] Example 1
[0026] This embodiment provides a sludge dewatering device, referring to... Figures 1-2 As shown, the device includes: a support frame 11, a drive assembly 2, a dewatering structure 3, a feed inlet 4, a discharge outlet 5, a liquid collection tank 6, a fixing sleeve 8, and a bracket 9. The drive assembly 2 is fixed to the support frame 11. The dewatering structure 3 is located at the upper end of the support frame 11, and the bracket 9 is fixed to the upper end of the support frame 11. One end of the dewatering structure 3 is connected to the drive assembly 2, and the other end is fixed to the upper end of the bracket 9 via the fixing sleeve 8. The feed inlet 4 is located at the upper front end of the dewatering structure 3, and the discharge outlet 5 is located at the lower rear end of the dewatering structure 3. The liquid collection tank 6 is fixed to the support frame 11 and is located below the feed inlet 4. A drain pipe 7 is connected to the bottom end of the liquid collection tank 6. Four feet 12 are symmetrically fixed to the bottom end of the support frame 11. The feet 12 are provided with mounting holes for fixing the sludge dewatering device through the four feet 12. The sludge to be dewatered is poured into the extrusion dewatering structure 3 from the feed port 4. The drive component 2 drives the extrusion dewatering structure 3 to dewater the sludge. The liquid extracted from the sludge flows from the front bottom of the extrusion dewatering structure 3 into the liquid collection tank 6 for collection, and then is discharged from the discharge pipe 7 for recycling. The sludge cake after dewatering is discharged from the discharge port 5 for recycling.
[0027] Reference Figures 3-5As shown, the extrusion dewatering structure 3 includes a conveying screw shaft 31, an extrusion screw shaft 32, a conveying screw 33, a conveying housing 35, a drain hole 36, a transition housing 37, an extrusion housing 38, an extrusion screw 39, and a bearing end cap 310. The conveying housing 35, transition housing 37, and extrusion housing 38 are arranged sequentially from front to back, and the three housings are sealed together by flanges. The bottom of the conveying housing 35 has a drain hole 36 for discharging the liquid extruded from the sludge. Specifically, the conveying housing 35 and the extrusion housing 38 are both cylindrical, while the transition housing 37 is conical, with its front diameter larger than its rear diameter. The rear end of the conveying screw shaft 31 is connected and fixed to the front end of the extrusion screw shaft 32, and the two maintain the same axis. The bearing end cap 310 is fixed to the rear end of the extrusion housing 38 to seal its rear end. The rear end of the extrusion screw shaft 32 is fixed in the bearing end cap 310 by a bearing. The conveying screw shaft 31 is located inside the conveying housing 35, and the extrusion screw shaft 32 is located inside the extrusion housing 38. The connection between the conveying screw shaft 31 and the extrusion screw shaft 32 is located inside the transition housing 37. The conveying screw 33 is fixed to the outside of the conveying screw shaft 31, and the extrusion screw 39 is fixed to the outside of the extrusion screw shaft 32. The conveying screw shaft 31 is cylindrical, and the front part of the extrusion screw shaft 32 is cylindrical with the same diameter as the conveying screw shaft 31. The rear diameter of the extrusion screw shaft 32 gradually increases, causing the space between the extrusion screw shaft 32 and the inner wall of the extrusion housing 38 to gradually decrease.
[0028] The sludge to be dewatered enters the conveying housing 35 through the feed inlet 4. Driven by the conveying screw 33, it moves backward along the conveying screw shaft 31. When passing through the transition housing 37 and the extrusion housing 38, the space between the shaft and the housing gradually decreases due to the tapered shape of the transition housing 37 and the gradually increasing diameter of the rear part of the extrusion screw shaft 32. This continuously extrudes the sludge, and the liquid released from the sludge flows out through the drain hole 36. The dewatered sludge cake is discharged from the discharge port 5 at the bottom of the rear end of the extrusion housing 38, thus completing the sludge dewatering process. It has high dewatering efficiency and good dewatering effect.
[0029] Reference Figures 2-4As shown, the drive assembly 2 includes a motor 21, a main pulley 22, a transmission belt 23, a driven pulley 24, and a reducer 25. The motor 21 is fixed inside the support frame 11, and several protective plates 13 are fixed outside the support frame 11 at the outer end of the motor 21. The main pulley 22 is fixed to the drive end of the motor 21, and the reducer 25 is fixed to the upper end of the support frame 11. In this embodiment, the reducer 25 can be a ZLYJ series hardened gear reducer with a horizontal gear surface. The minimum output speed of the reducer 25 is not greater than 20 r / min, the maximum output speed is not less than 100 r / min, and the maximum output torque is not less than 20000 Nm. The rated voltage of the motor 21 is 220V, and the rated power is not less than 5KW. Of course, the operating voltage and power of the motor 21 can also be selected according to the requirements. The pulley 24 is fixed to the drive shaft of the reducer 25. The main pulley 22 and the driven pulley 24 are connected by three transmission belts 23. A protective cover 14 is provided on the outside of the transmission belts 23, and the protective cover 14 is installed on the upper end of the support frame 11. The front end of the conveying screw shaft 31 is connected to the driven shaft of the reducer 25. A connecting cylinder 30 is fixed to the inner side of the reducer 25 on the outer ring of its driven shaft. The front end of the conveying housing 35 is sealed to the connecting cylinder 30 by a flange.
[0030] This utility model discloses a sludge dewatering device. During operation, the motor 21 in the drive assembly 2 rotates at high speed, driving the drive shaft of the reducer 25 to rotate via a belt. After being reduced in speed by the reducer 25, the conveying screw shaft 31 rotates at low speed. The sludge to be dewatered is continuously discharged from the feed inlet 4 into the conveying housing 35. Driven by the conveying screw 33, it moves backward and is continuously squeezed as it passes through the transition housing 37 and the extrusion housing 38. The liquid extracted from the sludge flows out from the drain hole 36 and into the liquid collection tank 6 for collection. Then, it is discharged from the drain pipe 7 for recycling. The dewatered sludge cake is discharged from the discharge port 5 at the bottom rear end of the extrusion housing 38 for recycling, thus completing the sludge dewatering process. This utility model's sludge dewatering device is driven by a single motor and can continuously dewater sludge. Its overall structure is simple, easy to use, and has high dewatering efficiency and good effect, making it suitable for field use. It can also be placed directly inside the carriage of an engineering vehicle and fixed to the carriage using the foot 12, thus enabling mobile operation and flexible use.
[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A sludge dewatering device, characterized in that, include: The structure comprises a support frame (11), a drive assembly (2), a dewatering extrusion structure (3), a feed inlet (4), a discharge outlet (5), a liquid collection tank (6), a fixing sleeve (8), and a bracket (9). The drive assembly (2) is fixed on the support frame (11). The dewatering extrusion structure (3) is located on the upper end of the support frame (11). The bracket (9) is fixed on the upper end of the support frame (11). One end of the dewatering extrusion structure (3) is connected to the drive assembly (2), and the other end of the dewatering extrusion structure (3) is fixed to the upper end of the bracket (9) through the fixing sleeve (8). The feed inlet... (4) The discharge port (5) is located at the upper front end of the extrusion dewatering structure (3), and the liquid collection tank (6) is fixed on the support frame (11). The liquid collection tank (6) is located below the feed port (4). The sludge is poured into the extrusion dewatering structure (3) from the feed port (4). The drive component (2) is used to drive the extrusion dewatering structure (3) to dewater the sludge. The liquid extracted from the sludge flows into the liquid collection tank (6) from the bottom front end of the extrusion dewatering structure (3) and is collected. The sludge after liquid extraction is discharged from the discharge port (5).
2. The sludge dewatering device according to claim 1, characterized in that: The extrusion dewatering structure (3) includes a conveying screw shaft (31), an extrusion screw shaft (32), a conveying screw (33), a conveying housing (35), a drain hole (36), a transition housing (37), an extrusion housing (38), an extrusion screw (39), and a bearing end cap (310). The conveying housing (35), the transition housing (37), and the extrusion housing (38) are arranged sequentially from front to back and are sealed together by flanges. The bottom of the conveying housing (35) is provided with a drain hole (36). The rear end of the conveying screw shaft (31) is connected and fixed to the front end of the extrusion screw shaft (32). The bearing end cap (310) is fixed to the rear end of the extrusion shell (38), and the rear end of the extrusion screw shaft (32) is fixed in the bearing end cap (310) by a bearing. The conveying screw shaft (31) is located inside the conveying shell (35), and the extrusion screw shaft (32) is located inside the extrusion shell (38). The connection between the conveying screw shaft (31) and the extrusion screw shaft (32) is located inside the transition shell (37). The conveying screw (33) is fixed to the outside of the conveying screw shaft (31), and the extrusion screw (39) is fixed to the outside of the extrusion screw shaft (32).
3. The sludge dewatering device according to claim 2, characterized in that: The conveying spiral shaft (31) is cylindrical, and the front part of the extrusion spiral shaft (32) is cylindrical with the same diameter as the conveying spiral shaft (31). The rear diameter of the extrusion spiral shaft (32) gradually increases, so that the space between the extrusion spiral shaft (32) and the inner wall of the extrusion shell (38) gradually becomes smaller.
4. The sludge dewatering device according to claim 3, characterized in that: The drive assembly (2) includes a motor (21), a main pulley (22), a transmission belt (23), a driven pulley (24), and a reducer (25). The motor (21) is fixed inside the support frame (11). The main pulley (22) is fixed at the drive end of the motor (21). The reducer (25) is fixed at the upper end of the support frame (11). The driven pulley (24) is fixed on the drive shaft of the reducer (25). The main pulley (22) and the driven pulley (24) are connected by several transmission belts (23). The front end of the conveying spiral shaft (31) is connected to the driven shaft of the reducer (25). A connecting cylinder (30) is fixed inside the reducer (25) at its driven shaft. The front end of the conveying housing (35) is connected to the connecting cylinder (30) by a flange.
5. The sludge dewatering device according to claim 4, characterized in that: The support frame (11) has several feet (12) symmetrically fixed at its bottom end, and the feet (12) are provided with mounting holes.
6. The sludge dewatering device according to claim 4, characterized in that: Several protective plates (13) are fixed on the outside of the support frame (11) located at the outer end of the motor (21).
7. The sludge dewatering device according to claim 5, characterized in that: The transmission belt (23) is provided with a protective cover (14) on the outside, and the protective cover (14) is installed on the upper end of the support frame (11).
8. The sludge dewatering device according to claim 2 or 3, characterized in that: The transition shell (37) is conical, with the front diameter being larger than the rear diameter.
9. The sludge dewatering device according to claim 5, characterized in that: The bottom end of the liquid collection tank (6) is connected to a drain pipe (7).