Centrifugal filter-pressing sludge dewatering device and method

Abstract

The invention provides a centrifugal filter-pressing sludge dewatering device, which comprises a shell, a Lurox triangular prism, a limiting frame, a supporting 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 limiting frame is fixedly connected with the shell. 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 structures are evenly fixed to the inner wall of the shell. And the driving device drives the Lurox triangular prism to rotate in the shell through the universal joint coupling. The invention further provides a sludge dewatering method adopting centrifugal filter pressing, centrifugal dewatering and filter pressing dewatering are synchronously carried out 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 invention relates to the technical field of sludge dehydration, and in particular to a centrifugal filter press sludge dehydration device and method. Background Art

[0002] Sludge is solid waste discharged from sewage treatment plants. After conditioning in sludge concentration tanks, the moisture content of sludge is still between 95% and 99%. Generally, sewage treatment plants use centrifuges or filter presses for dehydration. Centrifugal dehydration can only reduce the moisture content to 80%, and filter presses can reduce the moisture content to 60%. However, there is currently no equipment for simultaneous centrifugation and filter presses, which has problems such as low treatment efficiency, high energy consumption, large floor space, and complex operation. These problems are particularly evident when dealing with sludge with a high solid 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: A centrifugal filter press sludge dewatering device comprises a shell, a Lurocks triangular prism, a limit frame, a support structure and a driving device, wherein 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 press 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 with the shell, the Lurocks triangular prism is arranged in the shell and is provided with a material holding cavity and a centrifugal cavity arranged concentrically from the inside to the outside, a hole is provided between the material holding cavity and the centrifugal cavity, and the bottom of the Lurocks triangular prism is provided with a 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 a scraper matching 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.

[0004] Furthermore, two limit frames are provided, which are respectively located at the upper and lower parts of the Lurox triangular prism.

[0005] Furthermore, eight support structures are provided, and two 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.

[0006] Furthermore, 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.

[0007] Furthermore, the feed port is fixedly connected with a conical cylinder, and the wide-mouth end of the conical cylinder faces the feed pipe.

[0008] Furthermore, the bottom surface of the material containing cavity is configured to be conical, and the material discharge port is located at the center of the conical bottom surface of the material containing cavity.

[0009] Furthermore, the scraper is configured to have a shape that is compatible with the conical bottom surface of the material holding cavity.

[0010] Furthermore, the driving device adopts a servo motor.

[0011] A centrifugal filter press sludge dewatering method comprises the following steps: S1 Centrifugal feeding, the Lurox triangular prism is in a static state, the feed pipe is inserted into the feed port, and the conditioned sludge is injected into the material cavity in 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 feed outlet are closed; In the S2 centrifugal process, the Lurox triangular prism rotates at a 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 from the holes 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 chamber 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 Luluox triangular prism discharge, the discharge port is opened, the telescopic device drives the scraper to move downward, the sludge in the material chamber moves from top to bottom through the scraper to discharge the water-containing sludge in the Luluox triangular prism through the discharge port to the filter press space outside the Luluox triangular prism. After the water-less sludge is completely squeezed out of the material chamber, the discharge port is closed; S5 filter press process, a filter press cartridge is arranged in the housing, and driven by the driving device, the Lurox triangular prism rotates at high speed in 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 press cartridge and is discharged from the water filter hole 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, the discharge port is closed.

[0012] 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.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The same device is used to simultaneously carry out centrifugal dehydration and filter press dehydration, which further reduces the moisture content of sludge and improves the dehydration efficiency; 2. The device is designed to be able to continuously feed and discharge materials, which improves the processing capacity and production efficiency; 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

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of a transverse cross-section structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the vertical section structure of an embodiment of the present invention.

[0015] In the above drawings: shell 1, Lurox 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, conical cylinder 20. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Please refer to Figure 1~Figure 2As shown, a centrifugal filter press sludge dewatering device comprises a shell 1, a Lurocks triangular prism 2, a limit frame 5, a support structure 6 and a driving device 7, wherein 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 with the shell 1, the Lurocks triangular prism 2 is arranged in the shell 1 and is provided with a material receiving chamber 3 and a centrifugal chamber 4 which are arranged concentrically from the inside to the outside, a hole 13 is provided between the material receiving chamber 3 and the centrifugal chamber 4, and the bottom of the Lurocks triangular prism 2 is provided with a hole 13 which is connected to the feed pipe 10. A one-way feed port 14 leading to the material chamber 3, a water outlet 15 with a valve communicating with the centrifugal chamber 4, and a 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, and the telescopic device 17 adopts an electric hydraulic push rod. A scraper 18 matching the material chamber 3 is fixedly connected to the telescopic shaft of the telescopic device 17. The limit frame 5 is fixedly installed in the shell 1 and matches with the outer wall of the Lurocks triangular prism 2. The supporting 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.

[0018] The working principle is: utilizing the characteristics of the Lurox triangle to realize centrifugal dehydration in the centrifugal chamber 4 of the Lurox triangular prism 2, and at the same time utilizing the rotation of the Lurox triangular prism 2 to filter press the water-containing sludge, thereby realizing synchronous centrifugal dehydration and filter press dehydration, and further reducing the moisture content of the sludge.

[0019] In this embodiment, if Figure 2 As shown, two limit frames 5 are provided, respectively located at the upper and lower parts of the Lurocks triangular prism 2. The limit frames 5 matched with the Lurocks triangular prism 2 are used to limit the rotation of the Lurocks triangular prism 2, and the centrifugal effect of the centrifugal chamber 4 is ensured while the Lurocks triangular prism 2 rotates stably.

[0020] In this embodiment, if Figure 1 As shown, eight support structures 6 are provided, and two are provided on each inner wall of the housing 1, so that when the Lurox triangular prism 2 rotates, at least two support structures 6 are supported on the bottom of the Lurox triangular prism 2. Under the limiting effect of the limit frame 5, the two support structures 6 can stably support the stable and high-speed rotation of the Lurox triangular prism 2, thereby improving the stability of the entire structure.

[0021] In this embodiment, if Figure 1 , Figure 2As shown, the ends of the support structure 6 are rotatably connected with balls 19, and the balls 19 collide with the bottom surface of the Lurox triangular prism 2. The friction between the Lurox triangular prism 2 and the support structure 6 is reduced, and the stability of the rotation of the Lurox triangular prism 2 is improved.

[0022] In another embodiment, Figure 2 As shown, the feed port 14 is fixedly connected with a conical barrel 20, and the wide end of the conical 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.

[0023] 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 it is convenient to use and maintain.

[0024] In this embodiment, please refer to Figure 2 As shown, the scraper 18 is configured to be in a shape that is compatible with 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.

[0025] 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.

[0026] The present invention also provides a sludge dewatering method using centrifugal filter pressing, which adopts an intermittent operation mode and comprises the following steps: S1 centrifugal feeding, the Lurox triangular prism 2 is in a static state, the feed pipe 10 is inserted into the feed port 14, and the conditioned sludge is injected into the material cavity 3 in the Lurox triangular prism 2. After the injection is completed, the feed port 14 is closed, the feed pipe 10 is withdrawn from the shell 1, and the water outlet 15 and the feed port 16 are closed; S2 centrifugal process, driven by the driving device, the Lurox triangular prism 2 rotates at a high speed. 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 from the hole 13 between the material chamber 3 and the centrifugal chamber 4; S3: The Luluox triangular prism 2 is drained, the Luluox 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; S4 The Luluox 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 material chamber 3 moves from top to bottom through the scraper 18 to discharge the water-containing sludge in the Luluox triangular prism 2 through the discharge port 16 to the filter press space outside the Luluox triangular prism 2. After the water-less sludge is completely squeezed out of the material chamber 3, the discharge port 16 is closed; S5 filter press process, a filter press cartridge 11 is arranged in the housing 1, and driven by the driving device, the Lurox triangular prism 2 rotates at a high speed in the filter press mechanism, and the rotation of the Lurox triangular prism 2 further filters the sludge in the filter press space, and the filtered water passes through the filter press cartridge 11 and is discharged from the water filter hole 12 of the housing 1; S6 is the process of filtering and discharging. The discharge port 9 is opened, and the sludge is discharged from the device through the discharge port 9 arranged at the bottom of the shell 1. After the sludge is discharged, the discharge port 9 is closed.

[0027] When discharging the material, the entire Lurox triangular prism 2 can also be taken out from the shell 1 and then the waste material can be discharged according to needs.

[0028] Through the above steps, centrifugal dehydration and filter press dehydration are carried out simultaneously to further reduce the moisture content of the sludge and improve the dehydration efficiency.

[0029] In another embodiment, after the Lurox triangular prism 2 is discharged in S4, the Lurox triangular prism 2 starts to feed in a stationary state, and the next batch of conditioned sludge enters the Lurox triangular prism 2 from the feed port 14, and the steps S1 to S4 are repeated. The whole process can be carried out intermittently and continuously, thereby ensuring the efficient and stable operation of the device.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. 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 solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should 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 Lurocks 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 with the shell, the Lurocks triangular prism is arranged in the shell and is provided with a material containing cavity and a centrifugal cavity which are arranged concentrically from the inside to the outside, a hole is provided between the material containing cavity and the centrifugal cavity, and the bottom of the Lurocks triangular prism is provided with a A one-way feed port leading to the material holding chamber, a water outlet with a valve communicating with the centrifugal chamber, and a discharge port with a valve communicating with the material holding chamber, a telescopic device is fixedly connected to the top of the material holding chamber of the Lurocks triangular prism, a scraper matching with the material holding chamber is fixedly connected to the telescopic shaft of the telescopic device, the limit frame is fixedly installed in the shell and matches 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, and 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 Luluox 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 arranged 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 material 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 be in a shape that is compatible with 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 method for dewatering sludge by centrifugal filtration, characterized in that: Using the sludge dewatering device as described in any one of claims 1 to 8, in an intermittent operation mode, comprises the following steps: S1 Centrifugal feeding, the Lurox triangular prism is in a static state, the feed pipe is inserted into the feed port, and the conditioned sludge is injected into the material cavity in 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 feed outlet are closed; In the S2 centrifugal process, the Lurox triangular prism rotates at a 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 from the holes 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 chamber 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 Luluox triangular prism discharge, the discharge port is opened, the telescopic device drives the scraper to move downward, the sludge in the material chamber moves from top to bottom through the scraper to discharge the water-containing sludge in the Luluox triangular prism through the discharge port to the filter press space outside the Luluox triangular prism. After the water-less sludge is completely squeezed out of the material chamber, the discharge port is closed; S5 filter press process, a filter press cartridge is arranged in the housing, and driven by the driving device, the Lurox triangular prism rotates at high speed in 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 press cartridge and is discharged from the water filter hole 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, the discharge port is closed.

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

Images