Sludge discharge device for biological rotating disc filter for water quality treatment

Abstract

The utility model belongs to water quality treatment technical field, concretely relates to water quality treatment is with biological rotating disc filter pool sludge discharge device, including filter pool, the one end of filter pool is provided with water inlet, rotates and is installed with hollow water axle in filter pool, the outer periphery of hollow water axle is installed with a plurality of rotary filter disc at equidistance, both sides of every rotary filter disc all are provided with backwashing mechanism for washing the sludge adsorbed on rotary filter disc, backwashing mechanism includes the mounting support setting on the inner wall of filter pool, the top of mounting support is connected with scraping mechanism, cleaning mechanism, flushing mechanism and collection mechanism, through the scraping mechanism, cleaning mechanism, flushing mechanism and collection mechanism that set up, can scrape, clean, flush the sludge that adheres on the surface of rotary filter disc and carry out comprehensive cleaning, and the sludge after cleaning is collected, ensures that rotary filter disc can continuously keep good filterability, guarantees the effective treatment of entire water quality treatment biological rotating disc filter pool sludge discharge device to sewage.

Description

Technical Field

[0001] This utility model belongs to the field of water quality treatment technology, specifically relating to a sludge removal device for a biological rotating disc filter for water quality treatment. Background Technology

[0002] Water resources are the most critical resource for human life and production. However, today, the ecological environment is severely damaged and water pollution is serious. The protection of water resources and the treatment of water pollution have become the most concerning issues in modern society. With the development of my country's economy and the continuous increase in urban water demand, the contradiction between water supply and demand has become increasingly acute. The recycling and reuse of deeply treated wastewater has become an important part of water environment protection projects.

[0003] With the increasing national requirements for wastewater discharge, most wastewater treatment plants are now required to meet Class A discharge standards. Rotary disc filters, a new type of equipment developed in recent years by incorporating advanced foreign technologies, have significant market potential. Rotary disc filters are a novel wastewater filtration device that offers advantages over conventional filters, including better treatment efficiency, higher effluent quality, and more stable operation. The rotating filter disc, as the core component, is immersed in the wastewater during operation. The wastewater flows almost perpendicularly through the disc, passing through the fiber filter blocks. The filtered wastewater then enters the effluent shaft in the center of the disc, while sludge adheres to the surface of the fiber filter blocks.

[0004] Currently, there are two designs for mobile backwashing devices used in wastewater treatment: one uses an eccentric wheel at the motor end to drive the main backwash water supply pipe to rotate, thereby moving the backwash water supply branch pipes up and down; the other uses a steel wire rope to pull the backwash pipes up and down. Both of these mobile backwashing designs are not perfect. Relying on the eccentric wheel at the motor end to drive the main backwash water supply pipe means that deviation has a significant impact, and the eccentric wheel also experiences considerable force, making it cumbersome and unsafe to use. The steel wire rope traction method also presents significant safety hazards and is not easy to maneuver. Furthermore, a single backwashing device cannot effectively clean the discs, easily leading to equipment malfunctions.

[0005] In the prior art, sludge is washed off the filter disc by the backwashing mechanism and extracted by the backwashing pump. However, the sludge may contain large particles or solid particles, which may cause pump blockage and damage. The pump is usually not suitable for handling high-concentration or high-viscosity sludge. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this utility model provides a sludge removal device for biological rotating disc filters used in water treatment. Through the establishment of scraping, cleaning, rinsing, and collection mechanisms, it can comprehensively clean the sludge adhering to the surface of the rotating filter disc. This solves the problem in existing technologies where sludge is washed off the filter disc by a backwashing mechanism and then pumped out by a backwashing pump. However, the sludge may contain large particles or solid particles, which may cause pump blockage and damage. Pumps are generally not suitable for handling high-concentration or high-viscosity sludge.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a biological rotating disc filter sludge removal device for water treatment, comprising a filter tank with an inlet at one end. A hollow water shaft is rotatably mounted inside the filter tank, and several rotating filter discs are equidistantly mounted on the outer circumference of the hollow water shaft. Each rotating filter disc has a backwashing mechanism on both sides for cleaning the sludge adsorbed on the rotating filter disc. The backwashing mechanism includes a mounting bracket mounted on the inner wall of the filter tank, and a scraping mechanism, a cleaning mechanism, a rinsing mechanism, and a collection mechanism connected to the top of the mounting bracket. The scraping mechanism is used to scrape off the sludge adsorbed on the rotating filter disc; the cleaning mechanism is used to further clean the sludge adsorbed on the rotating filter disc; the rinsing mechanism is used to rinse the sludge adsorbed on the rotating filter disc; and the collection mechanism is used to collect the cleaned sludge adsorbed on the rotating filter disc.

[0008] Preferably, the scraping mechanism includes a backwash box disposed at the top of the mounting bracket, a scraper is formed on the side of the backwash box that contacts the rotating filter disc, and a guide slope is provided at the upper end of the scraper.

[0009] Preferably, the cleaning mechanism includes a rotating roller disposed inside the backwash box, a brush disposed on the outer side of the rotating roller, and a drive mechanism for driving the rotating roller to rotate disposed at the end of the rotating roller.

[0010] Preferably, the rinsing mechanism includes a rinsing water pipe disposed inside the backwash box, with several nozzles equidistantly arranged on the side of the rinsing water pipe facing the rotating filter disc, and a water pump connected to the rinsing water pipe.

[0011] Preferably, the collection mechanism includes a sludge collection pipe at the bottom of the backwash box.

[0012] Preferably, a sludge discharge port is provided at the end of the filter tank, and the sludge collection pipe is connected to the sludge discharge port.

[0013] Preferably, a sludge discharge pipe for cleaning the sludge settled at the bottom of the filter tank is provided below the rotating filter disc at the bottom of the filter tank, and the sludge discharge pipe is connected to the sludge discharge port.

[0014] Preferably, a level gauge for detecting the water level inside the filter tank is installed on one side of the inner wall of the filter tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: through the set scraping mechanism, sweeping mechanism, rinsing mechanism and collection mechanism, the sludge attached to the surface of the rotating filter disc can be scraped, swept and rinsed for a comprehensive cleaning, and the cleaned sludge can be collected to ensure that the rotating filter disc can maintain good filtration performance and ensure the effective treatment of sewage by the biological rotating disc filter sludge removal device for water quality treatment.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the sludge removal device for a biological rotating disc filter used in water treatment. Figure 1 .

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the sludge removal device for a biological rotating disc filter used in water treatment. Figure 2 .

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the sludge removal device for a biological rotating disc filter used in water treatment. Figure 3 .

[0020] Figure 4 A three-dimensional structural diagram of the internal filtration mechanism of a biological rotating disc filter sludge removal device for water treatment.

[0021] Figure 5 A three-dimensional structural diagram of the rotating filter disc double-sided backwashing mechanism of the sludge removal device for biological rotating disc filter ponds used in water quality treatment.

[0022] Figure 6 A schematic diagram of the backwashing mechanism of a sludge removal device for a biological rotating disc filter used in water treatment.

[0023] In the diagram: 1. Filter tank; 2. Inlet; 3. Hollow water shaft; 4. Rotating filter disc; 5. Backwashing mechanism; 51. Mounting bracket; 52. Scraping mechanism; 521. Backwash box; 522. Scraper; 523. Guide slope; 53. Cleaning mechanism; 531. Rotating roller; 532. Brush; 54. Flushing mechanism; 541. Flushing water pipe; 542. Nozzle; 55. Collection mechanism; 551. Collection pipe; 6. Sludge discharge port; 7. Sludge discharge pipe; 8. Level gauge. Detailed Implementation

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0025] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the biological rotating disc filter sludge removal device for water treatment includes a filter tank 1, with an inlet 2 at one end of the filter tank 1. A hollow water shaft 3 is rotatably installed inside the filter tank 1, and several rotating filter discs 4 are equidistantly installed on the outer periphery of the hollow water shaft 3. Each rotating filter disc 4 has a backwashing mechanism 5 on both sides for cleaning the sludge adsorbed on the rotating filter disc 4. The backwashing mechanism 5 includes a mounting bracket 51 installed on the inner wall of the filter tank 1. The top of the mounting bracket 51 is connected to a scraping mechanism 52, a cleaning mechanism 53, a rinsing mechanism 54, and a collection mechanism 55. The scraping mechanism 52 is used to scrape off the sludge adsorbed on the rotating filter disc 4. The cleaning mechanism 53 is used to further clean the sludge adsorbed on the rotating filter disc 4. The rinsing mechanism 54 is used to rinse the sludge adsorbed on the rotating filter disc 4. The collection mechanism 55 is used to collect the cleaned sludge adsorbed on the rotating filter disc 4.

[0026] This utility model proposes a sludge removal device for a biological rotating disc filter in water treatment. The filter tank 1 is the main location where the entire treatment process takes place, providing space for the installation and operation of other components. The inlet 2 is located at one end of the filter tank 1, through which wastewater enters the filter tank 1, serving as the first inlet for wastewater to enter the device for treatment.

[0027] The hollow water shaft 3 is rotatably installed inside the filter tank 1 and is the key component that drives the rotating filter disc 4 to rotate. The hollow design may help the internal water flow or other related treatment processes. By rotating, the rotating filter disc 4 continuously contacts the sewage to achieve filtration and other treatment effects.

[0028] Rotary filter discs 4 are equidistantly installed on the outer circumference of the hollow water shaft 3, and there are several of them. The rotary filter discs 4 are the main working components for sewage filtration. During the rotation of the rotary filter discs 4, the sewage comes into contact with the rotary filter discs 4, and impurities such as sludge are adsorbed on the rotary filter discs 4, thereby achieving the preliminary treatment of sewage.

[0029] Each rotating filter disc 4 is equipped with a backwashing mechanism 5 on both sides for cleaning the sludge adsorbed on the rotating filter disc 4.

[0030] Mounting bracket 51 serves as the mounting base for the various components of the backwashing mechanism 5, providing support and fixation to ensure that other components can be stably installed on the inner wall of the filter tank 1.

[0031] The scraping mechanism 52 is in direct contact with the rotating filter disc 4, and the sludge adsorbed on the surface of the rotating filter disc 4 is initially removed by physical scraping.

[0032] After the scraping mechanism 52 initially scrapes away the sludge, the cleaning mechanism 53 further cleans the rotating filter disc 4 to remove the sludge that the scraping mechanism 52 did not completely clean, ensuring the cleanliness of the rotating filter disc 4.

[0033] The rinsing mechanism 54 uses water flow to rinse the rotating filter disc 4, further removing the sludge adsorbed on the rotating filter disc 4, and using the impact force of the water flow to wash the sludge off the rotating filter disc 4.

[0034] The collection mechanism 55 collects the sludge that has fallen off the rotating filter disc 4 after being cleaned by the scraping mechanism 52, the cleaning mechanism 53 and the rinsing mechanism 54, to prevent the sludge from re-entering the sewage or affecting the normal operation of the device.

[0035] Wastewater enters the filter tank 1 through inlet 2. The hollow water shaft 3 drives the rotating filter disc 4 to rotate inside the filter tank 1. The wastewater continuously contacts the rotating filter disc 4, and sludge and other impurities are adsorbed onto the rotating filter disc 4, thus achieving preliminary filtration treatment of the wastewater.

[0036] As the rotating filter disc 4 continues to rotate, the backwashing mechanism 5 begins to operate when sludge on both sides of the disc affects filtration. First, the scraping mechanism 52 initially scrapes away the sludge adsorbed on the rotating filter disc 4; then, the cleaning mechanism 53 further cleans the disc 4 to remove residual sludge; next, the flushing mechanism 54 uses water flow to flush the disc 4, thoroughly washing the sludge off; finally, the collection mechanism 55 collects the washed-off sludge to prevent it from spreading within the filter tank 1 or affecting subsequent treatment. Through this series of backwashing operations, the rotating filter disc 4 maintains good filtration performance, ensuring the effective treatment of wastewater by the entire biological rotating disc filter sludge removal device for water treatment.

[0037] Combination Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the scraping mechanism 52 includes a backwash box 521 disposed at the top of the mounting bracket 51. A scraper 522 is formed on the side of the backwash box 521 that contacts the rotating filter disc 4. A guide slope 523 is provided at the upper end of the scraper 522.

[0038] Specifically, the backwash box 521 provides the mounting base and support structure for the other parts of the scraping mechanism 52. The overall structure may be a box shape with a certain strength and stability to ensure that it can withstand a certain force and maintain its shape during operation.

[0039] A scraper 522 is formed on the side of the backwash box 521 that contacts the rotating filter disc 4. The scraper 522 is a key part that directly contacts the rotating filter disc 4 and performs the function of scraping sludge. It is ensured that it is not easily damaged during long-term friction with the rotating filter disc 4 to scrape sludge, while effectively scraping sludge.

[0040] The guide slope 523 is a planar structure with a certain inclination angle. Its function is to guide the flow direction of the sludge, so that the sludge scraped off by the scraper 522 can move in a predetermined direction, which facilitates the subsequent collection and treatment of the sludge.

[0041] When the rotating filter disc 4 rotates in the opposite direction driven by the hollow water shaft 3, the scraping mechanism 52 begins to work. As the scraper 522 contacts the rotating filter disc 4, the sludge adsorbed on its surface is scraped off by the scraper 522. During the scraping process, the scraped sludge, upon contacting the guide slope 523, moves along the inclined direction of the guide slope 523, thus changing the flow path of the sludge, which might otherwise be scattered randomly. This allows the sludge to enter the subsequent collection mechanism 55 more smoothly, preventing it from splashing everywhere or re-adhering to the rotating filter disc 4 during the scraping process. This ensures the effective cleaning of the sludge on the rotating filter disc 4 by the scraping mechanism 52, and also guarantees the normal operation and efficient wastewater treatment of the entire biological rotating disc filter sludge removal device for water quality treatment.

[0042] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the cleaning mechanism 53 includes a rotating roller 531 disposed inside the backwash box 521, a brush 532 disposed on the outer side of the rotating roller 531, and a drive mechanism for driving the rotating roller 531 to rotate disposed at the end of the rotating roller 531.

[0043] Specifically, the rotating roller 531 is cylindrical in shape, with a certain length and diameter. Its two ends are usually mounted in corresponding positions in the backwash box 521 via bearings and other components to ensure stable rotation within the backwash box 521. The rotating roller 531 serves as the mounting carrier for the brush 532, and its rotational motion drives the brush 532 to perform the cleaning function on the rotating filter disc 4.

[0044] The brush 532 consists of numerous fine bristles that are evenly distributed on the outer surface of the rotating roller 531. The brush 532 contacts the surface of the rotating filter disc 4 and, through its rotational motion, further cleans the sludge remaining on the rotating filter disc 4 after it has been scraped off by the scraping mechanism 52, thereby improving the cleanliness of the rotating filter disc 4.

[0045] The drive mechanism is used to drive the rotating roller 531 to rotate. The specific form of the drive mechanism may include a combination of components such as a motor and a reducer. The motor provides the power source, and the reducer adjusts the high-speed rotation output of the motor to a speed suitable for the operation of the rotating roller 531 as needed, and transmits the power to the rotating roller 531 so that it can rotate stably at a predetermined speed and direction, thereby driving the brush 532 to clean the rotating filter disc 4.

[0046] After the rotating filter disc 4 passes through the scraping mechanism 52, although most of the sludge has been scraped off, some stubborn sludge or fine particles may still remain on the surface of the rotating filter disc 4. At this time, the cleaning mechanism 53 starts to work. The drive mechanism starts, driving the rotating roller 531 to rotate inside the backwash box 521. As the rotating roller 531 rotates, the brush 532 on its outer side rotates accordingly and comes into contact with the surface of the rotating filter disc 4. During the rotation, the bristles of the brush 532 generate friction with the surface of the rotating filter disc 4, further brushing off the sludge remaining on the rotating filter disc 4. Because the rotating roller 531 continues to rotate, the brush 532 can continuously clean the surface of the rotating filter disc 4, ensuring that the surface of the rotating filter disc 4 is cleaned more thoroughly, providing good conditions for the subsequent filtration process, and ensuring the effective treatment of sewage by the entire biological rotating disc filter sludge removal device for water treatment.

[0047] Combination Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the rinsing mechanism 54 includes a rinsing water pipe 541 disposed inside the backwash box 521. Several nozzles 542 are equidistantly arranged on one side of the rinsing water pipe 541 facing the rotating filter disc 4. A water pump is connected to the rinsing water pipe 541.

[0048] Specifically, the flushing water pipe 541 is typically a tubular structure with a certain length and diameter. The flushing water pipe 541 provides a water flow channel for the flushing process, delivering water to the location requiring flushing. The nozzle 542 is a key component for achieving water jetting, capable of spraying the water flow within the flushing water pipe 541 at a certain pressure and angle. The design of the nozzle 542 ensures that the water flow evenly covers the surface of the rotating filter disc 4, improving the flushing effect and effectively removing residual sludge from the rotating filter disc 4.

[0049] The water pump is the power source of the entire flushing mechanism 54. It can draw in external water sources (such as treated clean water or water circulating in the device) and increase the water pressure so that it can be sprayed onto the rotating filter plate 4 with sufficient pressure and flow through the flushing water pipe 541 and nozzle 542, ensuring that the flushing process can be carried out effectively.

[0050] After the rotating filter disc 4 is processed by the scraping mechanism 52 and the cleaning mechanism 53, some sludge or impurities that are difficult to remove physically may still remain on the surface of the rotating filter disc 4. At this time, the flushing mechanism 54 starts working. The water pump starts, draws water from an external water source or the circulating water system inside the device, pressurizes the water, and delivers it to the flushing water pipe 541. Under pressure, the water in the flushing water pipe 541 is sprayed out through several nozzles 542 that are set at equal intervals. Since the nozzles 542 are directly facing the surface of the rotating filter disc 4, the sprayed water can directly impact the surface of the rotating filter disc 4, washing away the residual sludge and impurities. The water is sprayed at a certain pressure and angle, which can ensure that the surface of the rotating filter disc 4 is thoroughly and effectively flushed, further cleaning the rotating filter disc 4, improving its filtration performance, and ensuring the continuous and effective treatment of sewage by the entire biological rotating disc filter sludge removal device for water quality treatment.

[0051] Combination Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the collection mechanism 55 includes a sludge collection pipe 551 at the bottom of the backwash box 521.

[0052] Specifically, the sludge collection pipe 551 is located at the bottom of the backwash box 521. The sludge collection pipe 551 is generally a tubular structure with a certain length and diameter, and its material must have good corrosion resistance and strength to adapt to the possible sludge environment and the needs of long-term use.

[0053] When the scraper 522 of the scraping mechanism 52 scrapes the sludge off the rotating filter disc 4, the brush 532 of the cleaning mechanism 53 further cleans the residual sludge, and the nozzle 542 of the rinsing mechanism 54 washes the sludge with water, the sludge will eventually collect at the bottom of the backwash box 521 due to its own gravity and the carrying effect of the water flow. At this time, the sludge collection pipe 551 located at the bottom of the backwash box 521 plays a key role. One end of the sludge collection pipe 551 is connected to the bottom of the backwash box 521, and the other end is connected to the subsequent sludge treatment system. Under the influence of gravity and a slight negative pressure (if the subsequent sludge treatment system has a suction device), the sludge collected at the bottom of the backwash box 521 will flow along the sludge collection pipe 551, thereby being collected and transported to the subsequent sludge treatment stage, preventing sludge from accumulating in the backwash box 521 and affecting the normal operation and treatment effect of the entire biological rotating disc filter sludge discharge device for water quality treatment.

[0054] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a sludge discharge port 6 is provided at the end of the filter tank 1, and the sludge collection pipe 551 is connected to the sludge discharge port 6.

[0055] Specifically, the sludge discharge port 6 is a specific opening in the filter tank 1 used to discharge sludge, ensuring that the sludge can be discharged smoothly.

[0056] One end of the sludge collection pipe 551 is connected to the bottom of the backwash box 521, and the other end is connected to the sludge discharge port 6, forming a complete sludge transport channel.

[0057] Since one end of the sludge collection pipe 551 is connected to the bottom of the backwash box 521 and the other end is connected to the sludge discharge port 6, under the influence of gravity and the suction effect of the subsequent sludge treatment system (if the subsequent sludge treatment system is equipped with a suction device), the sludge collected at the bottom of the backwash box 521 will flow along the sludge collection pipe 551 and eventually be discharged from the filter tank 1 through the sludge discharge port 6. In this way, the sludge generated in the filter tank 1 is discharged in a timely manner, avoiding the accumulation of sludge in the filter tank 1, ensuring that the entire biological rotating disc filter sludge discharge device for water quality treatment can operate continuously, stably, and efficiently, and ensuring the effective treatment of wastewater.

[0058] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a sludge discharge pipe 7 for cleaning the sludge settled at the bottom of the filter tank 1 is provided below the rotating filter disc 4 at the bottom of the filter tank 1. The sludge discharge pipe 7 is connected to the sludge discharge port 6.

[0059] Specifically, the sludge discharge pipe 7 is designed to prevent corrosion and damage during long-term sludge transport. The layout of the sludge discharge pipe 7 is designed according to the shape of the filter tank 1 and the sludge settling conditions, and is usually distributed in a mesh or ring shape to ensure comprehensive collection of the settled sludge at the bottom of the filter tank 1.

[0060] The sludge discharge port 6 is the outlet for discharging sludge from the filter tank 1. It is typically a regular shape, such as round or square, and its size depends on the actual amount of sludge to be processed and the design requirements of the equipment. The sludge discharge port 6 is connected to the sludge discharge pipe 7, allowing the sludge collected by the pipe 7 to be smoothly discharged from the filter tank 1.

[0061] As the device continues to operate, sludge accumulates at the bottom of filter tank 1. At this point, the sludge discharge pipe 7 begins to function. Because it is located below the rotating filter disc 4 and is arranged in a specific layout, it can comprehensively collect the sludge settled at the bottom of filter tank 1. Under the influence of gravity and the suction effect of a potential subsequent sludge treatment system (if the subsequent sludge treatment system is equipped with a suction device), the sludge flows along the sludge discharge pipe 7 and is finally discharged from filter tank 1 through the sludge discharge port 6 connected to the sludge discharge pipe 7.

[0062] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a level gauge 8 for detecting the water level inside the filter tank 1 is installed on one side of the inner wall of the filter tank 1.

[0063] Specifically, the level gauge 8 is an instrument used to detect the height of liquid levels, typically consisting of a sensor, a signal transmission line, and a display or control unit. The sensor is in direct contact with the water in the filter tank 1 and can sense changes in the water level; the signal transmission line transmits the water level signal detected by the sensor to the display or control unit; the display or control unit then presents the water level information in a visual manner or performs corresponding control operations based on a preset water level threshold.

[0064] This invention represents a preferred embodiment of the present invention, but its scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, shall be covered within the scope of protection of this invention.

Claims

1. A biological rotating disc filter sludge removal device for water treatment, comprising a filter tank (1), an inlet (2) at one end of the filter tank (1), a hollow water shaft (3) rotatably installed inside the filter tank (1), and a plurality of rotating filter discs (4) equidistantly installed on the outer periphery of the hollow water shaft (3), wherein each rotating filter disc (4) is provided with a backwashing mechanism (5) on both sides for cleaning the sludge adsorbed on the rotating filter disc (4), characterized in that, The backwashing mechanism (5) includes a mounting bracket (51) installed on the inner wall of the filter tank (1), and the top of the mounting bracket (51) is connected to a scraping mechanism (52), a cleaning mechanism (53), a rinsing mechanism (54) and a collecting mechanism (55). The scraping mechanism (52) is used to scrape off the sludge adsorbed on the rotating filter disc (4); The cleaning mechanism (53) is used to further clean the sludge adsorbed on the rotating filter disc (4); The rinsing mechanism (54) is used to rinse the sludge adsorbed on the rotating filter disc (4); The collection mechanism (55) is used to collect the sludge that has been washed and adsorbed onto the rotating filter disc (4).

2. The sludge removal device for a biological rotating disc filter for water treatment according to claim 1, characterized in that, The scraping mechanism (52) includes a backwash box (521) set at the top of the mounting bracket (51). A scraper (522) is formed on the side of the backwash box (521) that contacts the rotating filter disc (4). A guide slope (523) is provided at the upper end of the scraper (522).

3. The sludge removal device for a biological rotating disc filter for water treatment according to claim 2, characterized in that, The cleaning mechanism (53) includes a rotating roller (531) disposed inside the backwash box (521), a brush (532) disposed on the outside of the rotating roller (531), and a drive mechanism for driving the rotating roller (531) to rotate disposed at the end of the rotating roller (531).

4. The sludge removal device for a biological rotating disc filter for water treatment according to claim 2 or 3, characterized in that, The rinsing mechanism (54) includes a rinsing water pipe (541) located inside the backwash box (521). Several nozzles (542) are equidistantly arranged on one side of the rinsing water pipe (541) facing the rotating filter disc (4). A water pump is connected to the rinsing water pipe (541).

5. The sludge removal device for a biological rotating disc filter for water treatment according to claim 4, characterized in that, The collection mechanism (55) includes a sludge collection pipe (551) at the bottom of the backwash box (521).

6. The sludge removal device for a biological rotating disc filter for water treatment according to claim 5, characterized in that, The filter tank (1) is provided with a sludge discharge port (6) at its end, and the sludge collection pipe (551) is connected to the sludge discharge port (6).

7. The sludge removal device for a biological rotating disc filter for water treatment according to claim 6, characterized in that, Below the bottom rotating filter disc (4) of the filter tank (1), there is a sludge discharge pipe (7) for cleaning the sludge settled at the bottom of the filter tank (1), and the sludge discharge pipe (7) is connected to the sludge discharge port (6).

8. The sludge removal device for a biological rotating disc filter for water treatment according to claim 7, characterized in that, A level gauge (8) is installed on one side of the inner wall of the filter tank (1) to detect the water level inside the filter tank (1).

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