Centrifugal filter press sludge dewatering device and method

Abstract

The present invention provides a centrifugal filter press sludge dewatering device, comprising a housing, a Lurox triangular prism, a limiting frame, a support structure, and a drive device. The lower end of the housing is provided with a discharge port and a feed pipe, the inner wall of the housing is fixedly provided with a filter cartridge, the bottom of the side wall of the housing is provided with a plurality of water filter holes, the feed pipe is slidably connected to the housing, the Lurox triangular prism is internally provided with a material storage chamber and a centrifugal chamber, the bottom of the Lurox triangular prism is provided with a feed port, a water outlet, and a discharge port, the top of the material storage chamber is fixedly connected to a telescopic device, a scraper is fixedly connected to the telescopic shaft, the limiting frame is fixedly installed in the housing, the support structure is evenly fixed to the inner wall of the housing, and the drive device drives the Lurox triangular prism to rotate within the housing via a universal joint coupling. A centrifugal filter press sludge dewatering method is also provided, which uses the same device to simultaneously perform centrifugal dewatering and filter press dewatering, further reducing the sludge moisture content and improving dewatering efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge dewatering, and in particular to a centrifugal filter press sludge dewatering device and method. Background Art

[0002] Sludge is a solid waste discharged from sewage treatment plants. After conditioning in the sludge thickening tank, the moisture content of the sludge still reaches between 95% and 99%. Sewage treatment plants generally use centrifuges or filter presses for dehydration. Centrifugal dehydration can only reduce the moisture content to 80%, while filter presses can reduce the moisture content to 60%. However, there is currently no equipment that can perform both centrifugation and filter pressing. This leads to problems such as low treatment efficiency, high energy consumption, large floor space requirements, and complex operation. These problems are particularly prominent when treating sludge with a high solids content. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a centrifugal filter press sludge dewatering device. In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0004] A centrifugal filter press sludge dewatering device includes a shell, a Lurocks triangular prism, a limit frame, a support structure and a drive device. The upper end of the shell is provided with an opening, the lower end of the shell is provided with a discharge port with a valve and a feed pipe, the inner wall of the shell is fixedly provided with a coaxial filter cartridge, the bottom of the side wall of the shell is provided with a plurality of water filter holes, the feed pipe is slidably connected to the shell, the Lurocks triangular prism is arranged in the shell and is provided with a material chamber and a centrifugal chamber arranged concentrically from the inside to the outside, a hole is provided between the material chamber and the centrifugal chamber, and the bottom of the Lurocks triangular prism is provided with a hole. The feed pipe cooperates with a one-way feed port leading to the material storage chamber, a water outlet with a valve communicating with the centrifugal chamber, and a discharge port with a valve communicating with the material storage chamber. The top of the material storage chamber of the Lurocks triangular prism is fixedly connected with a telescopic device, and the telescopic shaft of the telescopic device is fixedly connected with a scraper that cooperates with the material storage chamber. The limit frame is fixedly installed in the shell and cooperates with the outer wall of the Lurocks triangular prism. The supporting structure is evenly fixed on the inner wall of the shell to support the Lurocks triangular prism. The driving device drives the Lurocks triangular prism to rotate in the shell through a universal joint coupling.

[0005] Furthermore, two limit frames are provided, which are respectively located at the upper and lower parts of the Lurox triangular prism.

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

[0007] Furthermore, the ends of the support structures are rotatably connected to balls, and the balls are in conflict with the bottom surface of the Lurox triangular prism.

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

[0009] Furthermore, the bottom surface of the material holding cavity is configured to be conical, and the discharge port is located at the center of the conical bottom surface of the material holding cavity.

[0010] Furthermore, the scraper is configured to have a shape that is compatible with the conical bottom surface of the material holding cavity.

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

[0012] A centrifugal filter press sludge dewatering method comprises the following steps:

[0013] S1 Centrifugal feeding: The Lurox triangular prism is in a static state, and the feed pipe is inserted into the feed port to inject the conditioned sludge into the material cavity inside the Lurox triangular prism. After the injection is completed, the feed port is closed, the feed pipe is withdrawn from the shell, and the water outlet and discharge port are closed;

[0014] In the S2 centrifugal process, the Lurox triangular prism rotates at high speed under the drive of the driving device. During the rotation of the Lurox triangular prism, the sludge is trapped in the circular material chamber, and the water is centrifuged into the centrifugal chamber through the hole between the material chamber and the centrifugal chamber;

[0015] S3 Luluox triangular prism drainage, Luluox triangular prism stops rotating, the drainage hole and the discharge port are opened, and the water in the centrifugal cavity is discharged from the device through the drainage hole and the discharge port. After the drainage is completed, the drainage hole and the discharge port are closed;

[0016] S4 Lurock triangular prism discharge, the discharge port is opened, the telescopic device drives the scraper to move downward, the sludge in the material chamber is discharged from the scraper from top to bottom to the water sludge in the Lurock triangular prism through the discharge port to the filter press space outside the Lurock triangular prism. After the sludge with less water is completely squeezed out of the material chamber, the discharge port is closed;

[0017] In the S5 filter press process, a filter cartridge is placed in the housing. Driven by a drive device, the Lurox triangular prism rotates at high speed within the filter press mechanism. The rotation of the Lurox triangular prism further filters the sludge in the filter press space, and the filtered water passes through the filter cartridge and is discharged from the water filter holes of the housing.

[0018] S6 filter press discharge, the discharge port is opened, and the sludge is discharged from the device through the discharge port set at the bottom of the shell. After the discharge is completed, the discharge port is closed.

[0019] Furthermore, after the Lurock triangular prism is discharged in S4, the Lurock triangular prism starts to feed in a static state, and the next batch of conditioned sludge enters the Lurock triangular prism from the feed port, and the steps S1 to S4 are repeated.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Use the same device to carry out centrifugal dehydration and filter press dehydration simultaneously, further reducing the sludge moisture content and improving the dehydration efficiency;

[0022] 2. The device is designed to be able to continuously feed and discharge materials, which improves the processing capacity and production efficiency;

[0023] 3. Utilizing the characteristics of the Lurox triangle and adopting an optimized structural design, unnecessary energy consumption is reduced, the equipment is easy to clean and maintain, and maintenance costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples:

[0025] Figure 1 This is a schematic diagram of a transverse cross-sectional structure of an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the vertical cross-section structure of an embodiment of the present invention.

[0027] In the above drawings: shell 1, Lurocks triangular prism 2, material chamber 3, centrifugal chamber 4, limit frame 5, support structure 6, universal joint coupling 7, opening 8, discharge port 9, feed pipe 10, filter press cartridge 11, water filter hole 12, hole 13, feed port 14, water outlet 15, discharge port 16, telescopic device 17, scraper 18, ball 19, tapered cylinder 20. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0029] Please refer to Figure 1~Figure 2As shown, a centrifugal filter press sludge dewatering device includes a shell 1, a Lurocks triangular prism 2, a limit frame 5, a support structure 6 and a drive device 7. The upper end of the shell 1 is provided with an opening 8, the lower end of the shell 1 is provided with a discharge port 9 with a valve and a feed pipe 10, the inner wall of the shell 1 is fixedly provided with a coaxial filter press cartridge 11, the bottom of the side wall of the shell 1 is provided with a plurality of water filter holes 12, the feed pipe 10 is slidably connected to the shell 1, the Lurocks triangular prism 2 is arranged in the shell 1 and is provided with a material chamber 3 and a centrifugal chamber 4 concentrically arranged from the inside to the outside, a hole 13 is provided between the material chamber 3 and the centrifugal chamber 4, and the bottom of the Lurocks triangular prism 2 is provided with a hole 13 that is aligned with the feed pipe 10. The one-way feed port 14 leading to the material chamber 3, the water outlet 15 with a valve communicating with the centrifugal chamber 4 and the discharge port 16 with a valve communicating with the material chamber 3 are matched. The top of the material chamber 3 of the Lurocks triangular prism 2 is fixedly connected with a telescopic device 17. The telescopic device 17 adopts an electric hydraulic push rod. The telescopic shaft of the telescopic device 17 is fixedly connected with a scraper 18 that cooperates with the material chamber 3. The limit frame 5 is fixedly installed in the shell 1 and cooperates with the outer wall of the Lurocks triangular prism 2. The support structure 6 is evenly fixed on the inner wall of the shell 1 to support the Lurocks triangular prism 2. The driving device drives the Lurocks triangular prism 2 to rotate in the shell 1 through the universal joint coupling 7.

[0030] The working principle is: utilizing the characteristics of the Lurox triangle, centrifugal dehydration is achieved in the centrifugal chamber 4 of the Lurox triangular prism 2, and at the same time, the rotation of the Lurox triangular prism 2 is used to filter press the water-containing sludge, thereby achieving synchronous centrifugal dehydration and filter press dehydration, and further reducing the moisture content of the sludge.

[0031] In this embodiment, if Figure 2 As shown, two limit frames 5 are provided, one at the upper and one at the lower portion of the Rurox triangular prism 2. The limit frames 5, which cooperate with the Rurox triangular prism 2, limit the rotation of the Rurox triangular prism 2, thereby ensuring the centrifugal effect of the centrifugal chamber 4 while the Rurox triangular prism 2 rotates stably.

[0032] In this embodiment, if Figure 1 As shown, eight support structures 6 are provided, two on each inner wall of the housing 1. This ensures that the Lurox triangular prism 2 is supported by at least two support structures 6 at its base during rotation. Under the restraining action of the limit frame 5, the two support structures 6 can stably support the stable, high-speed rotation of the Lurox triangular prism 2, thereby improving the stability of the entire structure.

[0033] In this embodiment, if Figure 1 、 Figure 2As shown, the ends of the support structure 6 are rotatably connected to balls 19, which contact the bottom surface of the Lurox triangular prism 2. This reduces the friction between the Lurox triangular prism 2 and the support structure 6 and improves the stability of the rotation of the Lurox triangular prism 2.

[0034] In another embodiment, Figure 2 As shown, the feed port 14 is fixedly connected with a tapered barrel 20, and the wide end of the tapered barrel 20 faces the feed pipe 10. When feeding into the material chamber 3, it is convenient to align the feed pipe 10 with the feed port 14, and the operation is convenient.

[0035] In another embodiment, Figure 2 As shown, the bottom surface of the material holding chamber 3 is set to be conical, and the discharge port 16 is located at the center of the conical bottom surface of the material holding chamber 3. It is convenient for sludge to be discharged from the material holding chamber 3 and is easy to use and maintain.

[0036] In this embodiment, please refer to Figure 2 As shown, the scraper 18 is configured to be in a shape that is adapted to the conical bottom surface of the material holding chamber 3. The scraper 18 is convenient for draining the sludge in the material holding chamber 3 and is easy to use.

[0037] In another embodiment, please refer to Figure 2 As shown, the driving device adopts a servo motor. The servo motor is convenient for controlling the position where the Lurox triangular prism 2 stops rotating so that the feed port 14 corresponds to the feed pipe 10.

[0038] The present invention also provides a sludge dewatering method using centrifugal filtration, which adopts an intermittent operation mode and includes the following steps:

[0039] S1 Centrifugal feeding: The Lurox triangular prism 2 is in a stationary state, and the feed pipe 10 is inserted into the feed port 14 to inject the conditioned sludge into the material cavity 3 inside the Lurox triangular prism 2. After the injection is completed, the feed port 14 is closed, the feed pipe 10 is withdrawn from the housing 1, and the water outlet 15 and the discharge port 16 are closed;

[0040] In the S2 centrifugal process, the Lurox triangular prism 2 rotates at high speed under the drive of the driving device. During the rotation of the Lurox triangular prism 2, the sludge is trapped in the circular material chamber 3, and the water is centrifuged into the centrifugal chamber 4 through the hole 13 between the material chamber 3 and the centrifugal chamber 4;

[0041] S3: The Lurocks triangular prism 2 is drained. The Lurocks triangular prism 2 stops rotating, the drain hole and the discharge port 9 are opened, and the water in the centrifugal chamber 4 is discharged from the device through the drain hole and the discharge port 9. After the water is discharged, the drain hole and the discharge port 9 are closed.

[0042] S4: The Lurock triangular prism 2 is discharged, the discharge port 16 is opened, and the telescopic device 17 drives the scraper 18 to move downward. The sludge in the hopper 3 is discharged from the scraper 18 from top to bottom, and the water-containing sludge in the Lurock triangular prism 2 is discharged through the discharge port 16 to the filter press space outside the Lurock triangular prism 2. After the water-poor sludge is completely squeezed out of the hopper 3, the discharge port 16 is closed.

[0043] In the S5 filter press process, a filter cartridge 11 is arranged in the housing 1. Driven by a driving device, the Lurox triangular prism 2 rotates at high speed within the filter press mechanism. The rotation of the Lurox triangular prism 2 further filters the sludge in the filter press space. The filtered water passes through the filter cartridge 11 and is discharged from the water filter hole 12 of the housing 1.

[0044] S6 is filter pressing and discharging, the discharge port 9 is opened, and the sludge is discharged from the device through the discharge port 9 provided at the bottom of the shell 1. After the sludge is discharged, the discharge port 9 is closed.

[0045] When discharging the material, the entire Lurox triangular prism 2 can also be taken out from the shell 1 and then the waste can be discharged, as needed.

[0046] Through the above steps, centrifugal dehydration and filter press dehydration are carried out simultaneously, which further reduces the moisture content of the sludge and improves the dehydration efficiency.

[0047] In another embodiment, after the Lurox triangular prism 2 is discharged in step S4, the Lurox triangular prism 2 begins feeding while in a stationary state. The next batch of conditioned sludge enters the Lurox triangular prism 2 through the feed port 14, and steps S1 to S4 are repeated. The entire process can be performed intermittently and continuously, thereby ensuring efficient and stable operation of the device.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A centrifugal filter press sludge dewatering device, characterized in that: The invention comprises a shell, a Lurock triangular prism, a limit frame, a support structure and a driving device. The upper end of the shell is provided with an opening, the lower end of the shell is provided with a discharge port with a valve and a feed pipe, the inner wall of the shell is fixedly provided with a coaxial filter cartridge, the bottom of the side wall of the shell is provided with a plurality of water filter holes, the feed pipe is slidably connected to the shell, the Lurock triangular prism is provided in the shell and is provided with a material chamber and a centrifugal chamber arranged concentrically from the inside to the outside, a hole is provided between the material chamber and the centrifugal chamber, and the bottom of the Lurock triangular prism is provided with a hole that matches the feed pipe. A one-way feed port leading to the material storage chamber, a water outlet with a valve communicating with the centrifugal chamber, and a discharge port with a valve communicating with the material storage chamber. The top of the material storage chamber of the Lurocks triangular prism is fixedly connected with a telescopic device, and a scraper that cooperates with the material storage chamber is fixedly connected to the telescopic shaft of the telescopic device. The limit frame is fixedly installed in the shell and cooperates with the outer wall of the Lurocks triangular prism. The supporting structure is evenly fixed on the inner wall of the shell to support the Lurocks triangular prism. The driving device drives the Lurocks triangular prism to rotate in the shell through a universal joint coupling.

2. The centrifugal filter press sludge dewatering device according to claim 1, characterized in that: There are two limit frames, which are respectively located at the upper and lower parts of the Lurox triangular prism.

3. The centrifugal filter press sludge dewatering device according to claim 1, characterized in that: There are eight support structures, two of which are provided on each inner wall of the shell, so that when the Lurox triangular prism rotates, there are at least two support structures supporting the bottom of the Lurox triangular prism.

4. The centrifugal filter press sludge dewatering device according to claim 3, characterized in that: The ends of the support structures are rotatably connected with balls, and the balls are in conflict with the bottom surface of the Lurox triangular prism.

5. The centrifugal filter press sludge dewatering device according to claim 1, characterized in that: The feed port is fixedly connected with a conical cylinder, and the wide-mouth end of the conical cylinder faces the feed pipe.

6. The centrifugal filter press sludge dewatering device according to claim 1, characterized in that: The bottom surface of the material holding cavity is configured to be conical, and the discharge port is located at the center of the conical bottom surface of the material holding cavity.

7. The centrifugal filter press sludge dewatering device according to claim 6, characterized in that: The scraper is configured to have a shape that is adapted to the conical bottom surface of the material holding cavity.

8. The centrifugal filter press sludge dewatering device according to claim 1, characterized in that: The driving device adopts a servo motor.

9. A sludge dewatering method using centrifugal filtration, characterized in that: The sludge dewatering device according to any one of claims 1 to 8 is used in an intermittent operation mode, comprising the following steps: S1 Centrifugal feeding: The Lurox triangular prism is in a static state, and the feed pipe is inserted into the feed port to inject the conditioned sludge into the material cavity inside the Lurox triangular prism. After the injection is completed, the feed port is closed, the feed pipe is withdrawn from the shell, and the water outlet and discharge port are closed; In the S2 centrifugal process, the Lurox triangular prism rotates at high speed under the drive of the driving device. During the rotation of the Lurox triangular prism, the sludge is trapped in the circular material chamber, and the water is centrifuged into the centrifugal chamber through the hole between the material chamber and the centrifugal chamber; S3 Luluox triangular prism drainage, Luluox triangular prism stops rotating, the drainage hole and the discharge port are opened, and the water in the centrifugal cavity is discharged from the device through the drainage hole and the discharge port. After the drainage is completed, the drainage hole and the discharge port are closed; S4 Lurock triangular prism discharge, the discharge port is opened, the telescopic device drives the scraper to move downward, the sludge in the material chamber is discharged from the scraper from top to bottom to the water sludge in the Lurock triangular prism through the discharge port to the filter press space outside the Lurock triangular prism. After the sludge with less water is completely squeezed out of the material chamber, the discharge port is closed; In the S5 filter press process, a filter cartridge is placed in the housing. Driven by a drive device, the Lurox triangular prism rotates at high speed within the filter press mechanism. The rotation of the Lurox triangular prism further filters the sludge in the filter press space, and the filtered water passes through the filter cartridge and is discharged from the water filter holes of the housing. S6 filter press discharge, the discharge port is opened, and the sludge is discharged from the device through the discharge port set at the bottom of the shell. After the discharge is completed, the discharge port is closed.

10. The sludge dewatering method using centrifugal filtration according to claim 9, characterized in that: After the S4 Lurock triangular prism discharges, the Lurock triangular prism starts feeding in a static state, and the next batch of conditioned sludge enters the Lurock triangular prism from the feed port, and the S1 to S4 processes are repeated.

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