Centrifugal filter-pressing sludge dewatering structure

Abstract

The utility model provides a centrifugal filter-pressing sludge dewatering structure, which comprises a shell, a Lurox triangular prism, a limit frame, a support structure and a driving device, the lower end of the shell is provided with a discharge port and a feed pipe, the inner wall of the shell is fixedly provided with a filter-pressing filter cartridge, the bottom of the side wall of the shell is provided with a plurality of water filtering holes, the feed pipe is slidably connected with the shell, and the limit frame is fixedly connected with the support structure. A material containing cavity and a centrifugal cavity are formed in the Lurox triangular prism, a feeding port, a water outlet and a discharging port are formed in the bottom of the Lurox triangular prism, a telescopic device is fixedly connected to the top of the material containing cavity, a scraper blade is fixedly connected to a telescopic shaft, the limiting frame is fixedly installed in the shell, and the supporting structure is fixed to the inner wall of the shell. The driving device drives the Lurox triangular prism to rotate in the shell, the bottom surface of the shell is in sliding connection with the inner wall, the pushing device is fixedly mounted on the bottom surface of the shell, centrifugal dewatering and filter-pressing dewatering are synchronously performed by adopting the same device, the water content of the sludge is further reduced, and the dewatering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge dewatering, in particular to a sludge dewatering structure for centrifugal pressure filtration. Background Art

[0002] Sludge is the solid waste discharged from a sewage treatment plant. After being conditioned from a sludge thickening tank, the water content of the sludge still reaches between 95% and 99%. Generally, a sewage treatment plant uses a centrifuge for dewatering or a filter press for dewatering. Centrifugal dewatering can only reduce the water content to 80%, and the filter press can reduce the water content to 60%. However, there is currently no equipment that combines centrifugation and pressure filtration at the same time, resulting in problems such as low treatment efficiency, high energy consumption, large floor area, and complex operation. These problems are more obvious especially when treating sludge with a relatively high solid content. Content of the Utility Model

[0003] In view of the deficiencies in the prior art, the utility model provides a sludge dewatering structure for centrifugal pressure filtration. To achieve the above object, the utility model adopts the following technical solutions:

[0004] A sludge dewatering structure for centrifugal pressure filtration includes a housing, a Reuleaux triangular prism, a limiting frame, a supporting structure and a driving device. An opening is provided at the upper end of the housing, and a discharge port with a valve and a feed pipe are provided at the lower end of the housing. A coaxially arranged pressure filtration filter cylinder is fixedly provided on the inner wall of the housing, and a plurality of water filtering holes are provided at the bottom of the side wall of the housing. The feed pipe is slidably connected to the housing. The Reuleaux triangular prism is arranged inside the housing, and a material containing cavity and a centrifugal cavity are concentrically arranged from the inside to the outside. A hole is provided between the material containing cavity and the centrifugal cavity. A one-way feed port leading to the material containing cavity, a water outlet with a valve communicating with the centrifugal cavity and a blanking port with a valve communicating with the material containing cavity are provided at the bottom of the Reuleaux triangular prism. A telescopic device is fixedly connected to the top of the material containing cavity of the Reuleaux triangular prism, and a scraper matching with the material containing cavity is fixedly connected to the telescopic shaft of the telescopic device. The limiting frame is fixedly installed inside the housing and matches with the outer wall of the Reuleaux triangular prism. The supporting structure is evenly fixed on the inner wall of the housing to support the Reuleaux triangular prism. The driving device drives the Reuleaux triangular prism to rotate inside the housing through a universal joint coupling. The bottom surface of the housing is slidably connected to the inner wall, and a pushing device is fixedly installed on the bottom surface of the housing.

[0005] Furthermore, there are two limiting frames, which are respectively located at the upper and lower parts of the Reuleaux triangular prism.

[0006] Furthermore, there are eight supporting structures, and two are provided on each inner wall of the housing, so that at least two supporting structures support the bottom of the Reuleaux triangular prism when the Reuleaux triangular prism rotates.

[0007] Furthermore, ball bearings are rotatably connected to the ends of the support structure, and the ball bearings are in contact with the bottom surface of the Reuleaux triangular prism.

[0008] Furthermore, a conical cylinder is fixedly connected to the feed inlet, and the wide-mouth end of the conical cylinder faces the feed pipe.

[0009] Furthermore, the bottom surface of the material-containing cavity is conical, and the discharge opening is located at the center of the conical bottom surface of the material-containing cavity.

[0010] Furthermore, the scraper is arranged in a shape adapted to the conical bottom surface of the material-containing cavity.

[0011] Furthermore, the driving device uses a servo motor.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The same device is used to synchronously perform centrifugal dewatering and pressure filtration dewatering, further reducing the moisture content of the sludge and improving the dewatering efficiency;

[0014] 2. The device is designed in a form that allows continuous feeding and discharging, improving the throughput and production efficiency;

[0015] 3. Utilizing the characteristics of the Reuleaux triangle and adopting an optimized structural design, unnecessary energy consumption is reduced, the equipment is easy to clean and maintain, and the maintenance cost is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0017] Figure 1 It is a schematic cross-sectional structure diagram of a horizontal section of an embodiment of the present utility model;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of a vertical section of an embodiment of the present utility model.

[0019] In the above-mentioned drawings: housing 1, Reuleaux triangular prism 2, material-containing cavity 3, centrifugal cavity 4, limit frame 5, support structure 6, universal joint coupling 7, opening 8, discharge port 9, feed pipe 10, pressure filtration filter cylinder 11, water filtration holes 12, holes 13, feed inlet 14, water outlet 15, discharge opening 16, telescopic device 17, scraper 18, ball bearing 19, conical cylinder 20, pushing device 21. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the technical solutions in the present utility model in conjunction with the drawings and embodiments.

[0021] Please refer to Figures 1 - 2As shown in the figure, a sludge dewatering structure for centrifugal filtration includes a housing 1, a Reuleaux triangular prism 2, a limiting frame 5, a support structure 6, and a driving device 7. An opening 8 is provided at the upper end of the housing 1, and a discharge port 9 with a valve and a feed pipe 10 are provided at the lower end of the housing 1. A coaxial pressure filtration cylinder 11 is fixedly arranged on the inner wall of the housing 1, and a number of water filtration holes 12 are provided at the bottom of the side wall of the housing 1. The feed pipe 10 is slidably connected to the housing 1. The Reuleaux triangular prism 2 is arranged inside the housing 1, and a material containing cavity 3 and a centrifugal cavity 4 are concentrically arranged from the inside to the outside. A hole 13 is provided between the material containing cavity 3 and the centrifugal cavity 4. A one-way feed port 14 leading to the material containing cavity 3, a water outlet 15 with a valve communicating with the centrifugal cavity 4, and a blanking port 16 with a valve communicating with the material containing cavity 3 are provided at the bottom of the Reuleaux triangular prism 2. A telescopic device 17 is fixedly connected to the top of the material containing cavity 3 of the Reuleaux triangular prism 2. The telescopic device 17 uses an electric hydraulic push rod. A scraping plate 18 cooperating with the material containing cavity 3 is fixedly connected to the telescopic shaft of the telescopic device 17. The limiting frame 5 is fixedly installed inside the housing 1 and cooperates with the outer wall of the Reuleaux triangular prism 2. The support structure 6 is evenly fixed on the inner wall of the housing 1 to support the Reuleaux triangular prism 2. The driving device drives the Reuleaux triangular prism 2 to rotate inside the housing 1 through a universal joint coupling 7. The bottom surface of the housing 1 is slidably connected to the inner wall, and a pushing device 21 is fixedly installed on the bottom surface of the housing 1.

[0022] The working principle is as follows: Utilizing the characteristics of the Reuleaux triangle, centrifugal dewatering is achieved in the centrifugal cavity 4 of the Reuleaux triangular prism 2. At the same time, the rotation of the Reuleaux triangular prism 2 is used to press-filter the water-containing sludge, realizing synchronous centrifugal dewatering and pressure filtration dewatering, and further reducing the moisture content of the sludge.

[0023] In this embodiment, as Figure 2 shown, there are two limiting frames 5, which are respectively located at the upper and lower parts of the Reuleaux triangular prism 2. The limiting frame 5 cooperating with the Reuleaux triangular prism 2 is used to limit the rotation of the Reuleaux triangular prism 2, ensuring the centrifugal effect of the centrifugal cavity 4 while the Reuleaux triangular prism 2 rotates stably.

[0024] In this embodiment, as Figure 1 shown, there are eight support structures 6, and two are provided on each inner wall of the housing 1, so that at least two support structures 6 support the bottom of the Reuleaux triangular prism 2 when the Reuleaux triangular prism 2 rotates. Under the limiting action of the limiting frame 5, the two support structures 6 can stably support the stable and high-speed rotation of the Reuleaux triangular prism 2, improving the stability of the entire structure.

[0025] In this embodiment, as Figure 1 、 Figure 2As shown, ball bearings 19 are rotatably connected to the ends of the support structure 6, and the ball bearings 19 are in contact with the bottom surface of the Reuleaux triangular prism 2. The friction between the Reuleaux triangular prism 2 and the support structure 6 is reduced, and the rotation stability of the Reuleaux triangular prism 2 is improved.

[0026] In another embodiment, as Figure 2 shown, a conical cylinder 20 is fixedly connected to the feed inlet 14, and the wide end of the conical cylinder 20 faces the feed pipe 10. When feeding into the material receiving cavity 3, it is convenient for the feed pipe 10 to be aligned with the feed inlet 14, and the operation is convenient.

[0027] In another embodiment, as Figure 2 shown, the bottom surface of the material receiving cavity 3 is formed into a cone, and the discharge opening 16 is located at the center of the conical bottom surface of the material receiving cavity 3. It is convenient for the sludge to be discharged from the material receiving cavity 3, and the use and maintenance are convenient.

[0028] In this embodiment, please refer to Figure 2 shown, the scraper 18 is formed into a shape adapted to the conical bottom surface of the material receiving cavity 3. It is convenient to use the scraper 18 to clean the sludge in the material receiving cavity 3, and the use is convenient.

[0029] In another embodiment, please refer to Figure 2 shown, the driving device adopts a servo motor. The servo motor is convenient for controlling the position where the Reuleaux triangular prism 2 stops rotating, so that the feed inlet 14 corresponds to the feed pipe 10.

[0030] The working mode adopts an intermittent operation mode, including the following steps:

[0031] S1. When the Reuleaux triangular prism 2 is in a stationary state, the feed pipe 10 is inserted into the feed inlet 14, and the conditioned sludge is injected into the material receiving cavity 3 inside the Reuleaux triangular prism 2. After the injection is completed, the feed inlet 14 is closed, the feed pipe 10 is withdrawn from the housing 1, and the water outlet 15 and the discharge opening 16 are closed;

[0032] S2. Driven by the driving device, the Reuleaux triangular prism 2 rotates at a high speed. During the rotation of the Reuleaux triangular prism 2, the sludge is intercepted in the circular material receiving cavity 3, and the water is centrifuged into the centrifugal cavity 4 through the holes 13 between the material receiving cavity 3 and the centrifugal cavity 4;

[0033] S3. The Reuleaux triangular prism 2 stops rotating, the drain hole and the discharge port 9 are opened, the water in the centrifugal cavity 4 is discharged from the device through the drain hole and the discharge port 9. After the discharge is completed, the drain hole and the discharge port 9 are closed;

[0034] S4. The pushing device 21 moves downward, creating a pressure filtration space between the bottom surface of the housing 1 and the Reuleaux triangular prism 2. The feeding port 16 is opened, and the telescopic device 17 drives the scraper 18 to move downward. The sludge in the material containing cavity 3 moves from top to bottom through the scraper 18, discharging the water-containing sludge in the Reuleaux triangular prism 2 to the pressure filtration space outside the Reuleaux triangular prism 2 through the feeding port 16. The pushing device 21 moves upward, pushing the sludge into the space between the inner wall of the housing 1 and the Reuleaux triangular prism 2, and the feeding port 16 is closed.

[0035] S5. Arrange the pressure filtration filter cylinder 11 in the housing 1. Driven by the driving device, the Reuleaux triangular prism 2 rotates at a high speed in the pressure filtration mechanism. The rotation of the Reuleaux triangular prism 2 further presses the sludge in the pressure filtration space, and the water pressed out passes through the pressure filtration filter cylinder 11 and is discharged from the water filtration holes 12 of the housing 1.

[0036] S6. The discharge port 9 is opened, and the sludge is discharged from the discharge port 9 provided at the bottom of the housing 1. After discharging, the discharge port 9 is closed.

[0037] During discharging, the entire Reuleaux triangular prism 2 can also be taken out of the housing 1 and then the waste is discharged, as needed.

[0038] Through the above steps, centrifugal dehydration and pressure filtration dehydration are carried out simultaneously, further reducing the moisture content of the sludge and improving the dehydration efficiency.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A sludge dewatering structure by centrifugal pressure filtration, characterized in that, It includes a housing, a Reuleaux triangular prism, a limiting frame, a support structure and a driving device. An opening is provided at the upper end of the housing, and a discharge port with a valve and a feed pipe are provided at the lower end of the housing. A coaxial pressure filter cartridge is fixedly arranged on the inner wall of the housing. A number of water filtering holes are provided at the bottom of the side wall of the housing. The feed pipe is slidably connected to the housing. The Reuleaux triangular prism is arranged in the housing, and a material containing cavity and a centrifugal cavity are concentrically arranged from the inside to the outside. A hole is provided between the material containing cavity and the centrifugal cavity. A one-way feed port leading to the material containing cavity, a water outlet with a valve communicating with the centrifugal cavity and a blanking port with a valve communicating with the material containing cavity are provided at the bottom of the Reuleaux triangular prism and are matched with the feed pipe. A telescopic device is fixedly connected to the top of the material containing cavity of the Reuleaux triangular prism. A scraping plate matched with the material containing cavity is fixedly connected to the telescopic shaft of the telescopic device. The limiting frame is fixedly installed in the housing and is matched with the outer wall of the Reuleaux triangular prism. The support structure is evenly fixed on the inner wall of the housing to support the Reuleaux triangular prism. The driving device drives the Reuleaux triangular prism to rotate in the housing through a universal joint coupling. The bottom surface of the housing is slidably connected to the inner wall, and a pushing device is fixedly installed on the bottom surface of the housing.

2. The sludge dewatering structure for centrifugal pressure filtration according to claim 1, wherein: There are two limiting frames, which are respectively located at the upper and lower parts of the Reuleaux triangular prism.

3. The sludge dewatering structure of centrifugal pressure filtration according to claim 1, characterized in that: There are eight support structures. Two are provided on each inner wall of the housing, so that at least two support structures support the bottom of the Reuleaux triangular prism when it rotates.

4. The sludge dewatering structure for centrifugal pressure filtration according to claim 3, characterized in that: The ends of the support structures are all rotatably connected with balls, and the balls are in contact with the bottom surface of the Reuleaux triangular prism.

5. The sludge dewatering structure for centrifugal pressure filtration according to claim 1, characterized in that: A conical cylinder is fixedly connected to the feed port, and the wide-mouth end of the conical cylinder faces the feed pipe.

6. The sludge dewatering structure by centrifugal pressure filtration according to claim 1, characterized in that: The bottom surface of the material containing cavity is arranged in a conical shape, and the blanking port is located at the center of the conical bottom surface of the material containing cavity.

7. The sludge dewatering structure for centrifugal pressure filtration according to claim 6, wherein: The scraping plate is arranged in a shape adapted to the conical bottom surface of the material containing cavity.

8. The sludge dewatering structure for centrifugal pressure filtration according to claim 1, wherein: The driving device adopts a servo motor.

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