Flocculant dispensing system for sewage treatment and sludge dewatering system

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a flocculating agent dispensing system for sewage treatment and a sludge dewatering system, and the dispensing system comprises a control module, a quantifying module, an adding module, a reclaimed water filtering module and a diluting module, the quantifying module is used for containing the milky flocculant and monitoring the variable quantity of the milky flocculant; two ends of the adding module are respectively connected with the quantifying module and the diluting module; a water inlet pipe connected with a water source and a water outlet pipe connected with the dilution module are arranged on the reclaimed water filtering module; a stirring part for mixing a flocculating agent and reclaimed water is arranged in the dilution module; the control module is connected with the quantifying module, the adding module, the reclaimed water filtering module and the diluting module. According to the scheme provided by the utility model, the emulsion flocculant can be dissolved and dispensed by using reclaimed water, the concentration of the flocculant solution is controllable, the flocculant and sludge can be fully mixed during sludge dewatering, the optimal sludge dewatering effect is achieved, and the waste of water resources can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, and more specifically, to a flocculant preparation system and a sludge dewatering system for wastewater treatment. Background Technology

[0002] In the wastewater treatment process, water purification companies use flocculants to dewater sludge after extracting it. The flocculant is thoroughly mixed with the sludge in a centrifugal dewatering machine to create flocculation, separating the sludge from the water. Further centrifugation causes the flocs to aggregate into clumps, completing the sludge dewatering process. When using flocculants to flocculate the sludge, the concentration of the flocculant must be controlled within a specific range to achieve optimal dewatering results.

[0003] Currently, the flocculants used are mainly powdered flocculants, and the solvent for preparing the solution is mainly tap water. This is because micro-particle impurities in the wastewater will be adsorbed by the flocculant and precipitate, affecting the flocculation effect of the flocculant. Therefore, it is necessary to use treated tap water that meets the standards to rinse the sludge and flocculant and mix the two.

[0004] However, in practical applications, it has been found that powdered flocculants are easily entrained by sludge when mixed with it, resulting in insufficient mixing. Consequently, the flocculant solution concentration cannot reach the target concentration, thus failing to maximize the flocculation effect and achieve optimal sludge dewatering. Furthermore, using tap water to rinse the sludge and flocculant also wastes water resources. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies that use tap water to mix sludge and powdered flocculants, resulting in insufficient mixing of flocculants and sludge and water waste. This invention provides a flocculant preparation system and a sludge dewatering system for wastewater treatment. This solution uses recycled water to dissolve the flocculant to form a flocculant solution, which is then used to flush the sludge. The concentration of the flocculant is controllable. During sludge dewatering, not only can the flocculant and sludge be fully mixed, but water waste can also be reduced.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A flocculant dosing system for wastewater treatment is provided, comprising a control module, a metering module, a dosing module, a greywater filtration module, and a dilution module. The metering module holds the emulsion flocculant and monitors changes in the flocculant concentration. The dosing module is connected to both the metering module and the dilution module. The greywater filtration module has an inlet pipe for connecting to a water source and an outlet pipe connected to the dilution module. The dilution module contains a stirring section for mixing the flocculant and greywater. The control module is connected to the metering module, the dosing module, the greywater filtration module, and the dilution module. The dosing module can displace the flocculant from the metering module into the dilution module.

[0008] In operation, the dosing system of this invention involves the dosing module adding flocculant from the metering module to the dilution module. The greywater, flowing through the inlet pipe into the greywater filtration module, is filtered to remove fine particulate impurities. It then flows through the outlet pipe into the dilution module, where a stirring unit thoroughly mixes the greywater and flocculant to prepare a flocculant-based solution. Simultaneously, the control module determines the total amount of flocculant added to the dilution module based on changes in the flocculant concentration in the metering module. It then calculates the concentration of the flocculant solution within the dilution module based on its volume and controls the dosing module to stop adding flocculant.

[0009] The flocculant preparation system of this invention uses recycled water to prepare the flocculant, which can save water resources and avoid the waste of water resources caused by using tap water to prepare the flocculant. At the same time, the concentration of the prepared flocculant is controllable, which can ensure that the concentration of the flocculant solution used in the sludge dewatering process is within the optimal range, thereby enabling the sludge to achieve the best dewatering effect.

[0010] Preferably, the quantitative module includes a container for holding emulsion flocculant and a weighing unit for weighing the container. The weighing unit is connected to the control module, and the container is located on the weighing unit. The container can be a container such as a tank or container for holding emulsion flocculant; the weighing unit can be a weighing device such as a platform scale for measuring weight. The weighing unit is connected to the control module and can monitor the weight change of the container in real time. The decrease in weight of the container before and after loading is the total amount of flocculant added by the dosing module to the dilution module. The container holds emulsion flocculant, which is easier to prepare into flocculant solution and to add to the dosing module.

[0011] Preferably, the dosing module includes a diaphragm pump, the inlet of which is connected to the container via an inlet pipe, and the outlet of which is connected to the dilution module via an outlet pipe. The diaphragm pump is also connected to the control module. The diaphragm pump can pump emulsion flocculant from the container into the dilution module.

[0012] Preferably, the dilution module includes a stirring tank, with the stirring section located within the inner cavity of the stirring tank. Both the dosing module and the greywater filtration module are connected to the inner cavity of the stirring tank. After greywater and flocculant are added to the stirring tank, the stirring section stirs the greywater and flocculant to form a flocculant solution. The stirring section is a stirring blade connected to a drive motor.

[0013] Preferably, the dilution module further includes a mixing section, which is installed on top of the stirring tank. The mixing section is inverted conical in shape, and its bottom has an outlet communicating with the stirring tank. Both the dosing module and the greywater filtration module are connected to the top of the side wall of the mixing section. The mixing section can be conical or square-pyramidal. When the water flowing from the greywater filtration module enters the inner cavity of the mixing section, due to the inertia of the water flow itself, it forms a vortex after washing against the side wall of the mixing section, and finally flows into the dilution module through the outlet of the mixing section. At the same time, the emulsion flocculant enters the inner cavity of the mixing section, mixes with the water flow forming the vortex, and then flows into the dilution module through the outlet of the mixing section. The mixing section facilitates the initial mixing of the flocculant and the water flow.

[0014] Preferably, the mixing tank is provided with a first partition and a second partition arranged sequentially, which divide the inner cavity of the mixing tank into a first inner cavity, a second inner cavity, and a third inner cavity. Each of the first, second, and third inner cavities is equipped with a mixing section, with the mixing section installed at the top of the first inner cavity. The third inner cavity is also equipped with a level gauge, which is fixedly installed in the third inner cavity and connected to the control module. The first and second partitions are of the same height, and both their heights are less than the depth of the mixing tank. The mixing tank is divided into three accommodating cavities by the first and second partitions. When the water level in the first inner cavity is higher than the height of the first partition, the flocculant solution in the first inner cavity will overflow into the second inner cavity; similarly, when the water level in the second inner cavity is higher than the height of the second partition, the flocculant solution in the second inner cavity will overflow into the third inner cavity. All three inner chambers are equipped with stirring units, which further improves the dissolution effect of the flocculant. Compared with the first and second inner chambers, the concentration of the flocculant solution in the third inner chamber is more uniform. In use, the flocculant solution in the third inner chamber is first used for sludge dewatering, resulting in better dewatering. A level monitor is installed in the third inner chamber, allowing the control unit to promptly obtain the level signal. When the third inner chamber is full, the entire dosing system is stopped to prevent solution overflow and waste. Similarly, more baffles with height differences can be installed to divide the interior of the mixing tank into more compartments.

[0015] Preferably, the greywater filtration module includes a housing and a filter element. The inlet pipe and the outlet pipe are both installed on the housing and communicate with the inner cavity of the housing. The filter element is installed within the inner cavity of the housing. The filter element can filter out bacteria, particulate matter, and microorganisms with a diameter greater than 0.01 μm in the greywater, ensuring that the filtered greywater meets the preparation conditions for flocculant solutions.

[0016] Preferably, the outlet pipe is equipped with a first solenoid valve, and the housing is equipped with a flushing port connecting the inner cavity of the housing to the outside. A second solenoid valve is installed on the flushing port. Both the first and second solenoid valves are connected to the control module. When the first solenoid valve is closed and the second solenoid valve is open, the greywater flowing into the housing can flush the filter element, carrying away impurities. When the second solenoid valve is closed and the first solenoid valve is open, the greywater that has completed filtration in the greywater filtration module can flow out along the outlet pipe.

[0017] This utility model also provides a sludge dewatering system, including a centrifugal dewatering machine and a chemical supply module. The chemical supply module is a flocculant dosing system for sewage treatment as described above. The inner cavity of the centrifugal dewatering machine is connected to the dilution module through a chemical supply pipe, and a valve is provided on the chemical supply pipe.

[0018] When the sludge dewatering system of this utility model is in operation, the valve on the supply pipe is opened, and the flocculant solution in the dosing system flows into the centrifugal dewatering machine through the supply pipe. After the flocculant solution in the centrifugal dewatering machine is fully mixed with the sludge, all the tiny impurities in the sludge are formed into flocs and precipitated. Then the centrifugal dewatering machine starts working to separate the sludge and precipitate from the water, thus completing the sludge dewatering.

[0019] The sludge dewatering system of this invention uses a pre-prepared flocculant solution to directly flush the sludge during operation, which avoids the problem of sludge carrying over flocculant. Furthermore, the concentration of the flocculant solution is within the optimal range for use, enabling the sludge to achieve the best dewatering effect after flocculation and sedimentation.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The flocculant preparation system of this invention uses recycled water to prepare the flocculant, which can save water resources and avoid the waste of water resources caused by using tap water to prepare the flocculant. At the same time, the concentration of the prepared flocculant is controllable, which can ensure that the concentration of the flocculant solution used in the sludge dewatering process is within the optimal range, thereby enabling the sludge to achieve the best dewatering effect.

[0022] The sludge dewatering system of this invention uses a pre-prepared flocculant solution to directly flush the sludge during operation, which avoids the problem of sludge carrying over flocculant. Furthermore, the concentration of the flocculant solution is within the optimal range for use, enabling the sludge to achieve the best dewatering effect after flocculation and sedimentation. Attached Figure Description

[0023] Figure 1 A schematic diagram of a flocculant dosing system for wastewater treatment;

[0024] Figure 2 A schematic diagram of the greywater filtration module in a flocculant dosing system for wastewater treatment;

[0025] Figure 3 This is another schematic diagram of the greywater filtration module in a flocculant dosing system for wastewater treatment.

[0026] In the attached diagram: 1. Quantitative module; 2. Dosing module; 3. Greywater filtration module; 4. Dilution module; 5. Inlet pipe; 6. Outlet pipe; 101. Container section; 102. Weighing section; 201. Diaphragm pump; 202. Feed pipe; 203. Discharge pipe; 301. Shell; 302. Filter element; 303. First solenoid valve; 304. Second solenoid valve; 305. Third solenoid valve; 306. Fourth solenoid valve; 311. First flow channel; 312. Second flow channel; 401. Stirring section; 402. Stirring tank; 403. Mixing section; 421. First inner cavity; 422. Second inner cavity; 423. Third inner cavity. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] This embodiment is a first embodiment of a flocculant dosing system for wastewater treatment, such as... Figure 1 The system includes a control module, a metering module 1, a dosing module 2, a greywater filtration module 3, and a dilution module 4. The metering module 1 holds the emulsion flocculant and monitors its changes. The dosing module 2 is connected to both the metering module 1 and the dilution module 4. The greywater filtration module 3 has an inlet pipe 5 for connecting to a water source and an outlet pipe 6 connected to the dilution module 4. The dilution module 4 contains a stirring unit 401 for mixing the flocculant and greywater. The control module is connected to the metering module 1, the dosing module 2, the greywater filtration module 3, and the dilution module 4. The dosing module 2 can add the flocculant from the metering module 1 to the dilution module 4. The control module is an intelligent device with a display screen and a data processor, including but not limited to computers and tablets.

[0031] Specifically, the quantitative module 1 includes a container 101 for holding emulsion flocculant and a weighing unit 102 for weighing the container 101. The weighing unit 102 is connected to the control module, and the container 101 is located on the weighing unit 102. The container 101 is a container, and the weighing unit 102 is a platform scale.

[0032] Specifically, the dosing module 2 includes a diaphragm pump 201. The feed end of the diaphragm pump 201 is connected to the container 101 through the feed pipe 202, the discharge end of the diaphragm pump 201 is connected to the dilution module 4 through the discharge pipe 203, and the diaphragm pump 201 is connected to the control module.

[0033] Specifically, the dilution module 4 includes a mixing tank 402, with a stirring section 401 located inside the mixing tank 402. The dosing module 2 and the greywater filtration module 3 are both connected to the inner cavity of the mixing tank 402. The stirring section 401 consists of stirring blades connected to a drive motor.

[0034] Specifically, the greywater filtration module 3 includes a housing 301 and a filter element 302. The inlet pipe 5 and outlet pipe 6 are both installed on the housing 301 and communicate with its inner cavity. The filter element 302 is installed within the inner cavity of the housing 301. The filter element 302 can filter out bacteria, particulate matter, and microorganisms with a diameter greater than 0.01 μm from the greywater.

[0035] The working principle or process of this embodiment is as follows:

[0036] When the dosing system is working, the diaphragm pump 201 in the dosing module 2 starts operating, drawing emulsion flocculant from the container 101. The emulsion flocculant passes sequentially through the feed pipe 202, the diaphragm pump 201, and the discharge pipe 203, and is finally discharged into the mixing tank 402 along the discharge end of the discharge pipe 203. Reclaimed water from the water source enters the reclaimed water filtration module 3 through the inlet pipe 5, filtering out micro-particle impurities. The filtered reclaimed water is then discharged into the mixing tank 402 through the outlet pipe 6. The emulsion flocculant and reclaimed water in the mixing tank 402 are mixed by the mixing unit 401 to form a wastewater flocculant solution ready for use. When needed, the wastewater flocculant solution is directly drawn and mixed with sludge to complete the sludge flocculation and sedimentation.

[0037] The beneficial effects of this embodiment are as follows:

[0038] The flocculant dosing system in this embodiment uses recycled water to prepare the flocculant, which saves water resources and avoids the waste of water resources caused by using tap water to prepare the flocculant. At the same time, the concentration of the prepared flocculant is controllable, which can ensure that the concentration of the flocculant solution used in the sludge dewatering process is within the optimal range, thereby enabling the sludge to achieve the best dewatering effect.

[0039] Example 2

[0040] This embodiment is a second embodiment of a flocculant preparation system for wastewater treatment, such as... Figure 1 and Figure 2 As shown, this embodiment further defines the dilution module 4 and the greywater filtration module 3 based on embodiment one.

[0041] Specifically, the dilution module 4 also includes a mixing section 403, which is installed on the top of the mixing tank 402. The mixing section 403 is inverted cone-shaped, and the bottom of the mixing section 403 is provided with an outlet that connects to the mixing tank 402. The dosing module 2 and the greywater filtration module 3 are both connected to the top of the side wall of the mixing section 403.

[0042] Specifically, the mixing tank 402 is provided with a first partition and a second partition arranged in sequence. The first partition and the second partition divide the inner cavity of the mixing tank 402 into a first inner cavity 421, a second inner cavity 422 and a third inner cavity 423 in sequence. A stirring part 401 is provided in the first inner cavity 421, the second inner cavity 422 and the third inner cavity 423, and a mixing part 403 is installed on the top of the first inner cavity 421.

[0043] Specifically, a liquid level monitor is also provided in the third inner cavity 423. The liquid level monitor is fixedly installed in the third inner cavity 423 and is connected to the control module.

[0044] Specifically, the outlet pipe 6 is equipped with a first solenoid valve 303, the flow channel inside the housing 301 is straight, the filter element 302 is located inside the housing 301, the housing 301 is provided with a flushing port connecting the inside of the housing 301 and the outside, and the flushing port is equipped with a second solenoid valve 304. The flushing port and the inlet pipe 5 are located at both ends of the housing 301, and the outlet pipe 6 connects to the middle of the side wall of the housing 301.

[0045] The working principle or process of this embodiment is as follows:

[0046] When the water flowing from the greywater filtration module 3 enters the inner cavity of the mixing section 403, due to the inertia of the water flow itself, it forms a vortex after washing against the side wall of the mixing section 403, and finally flows into the dilution module 4 along the outlet of the mixing section 403. At the same time, the emulsion flocculant enters the inner cavity of the mixing section 403, mixes with the water flow forming the vortex, and flows into the first inner cavity 421 from the outlet of the mixing section 403. When the water level in the first inner cavity 421 is higher than the height of the first partition, the flocculant solution in the first inner cavity 421 will overflow into the second inner cavity 422. Similarly, when the water level in the second inner cavity 422 is higher than the height of the second partition, the flocculant solution in the second inner cavity 422 will overflow into the third inner cavity 423. The flocculant solution in the third inner cavity 423 is used for direct sludge washing. When the level monitor detects that the water level in the third inner cavity 423 has reached the target value, the level monitor sends a water level warning signal to the control module. After receiving the water level warning signal, the control module controls the entire drug dispensing system to stop working.

[0047] When the greywater filtration module 3 starts working, the first solenoid valve 303 opens and the second solenoid valve 304 closes. At this time, the greywater entering the inner cavity of the housing 301 through the inlet pipe 5 is filtered by the filter element 302 and flows out through the outlet pipe 6. When the greywater filtration module 3 does not need to filter, the first solenoid valve 303 closes, and the second solenoid valve 304 can be opened and closed periodically under the control of the control module. When the second solenoid valve 304 opens, the greywater entering the inner cavity of the housing 301 through the inlet pipe 5 flushes the filter element 302 in a direct flushing manner. The water flow carries the impurities flushed off the filter element 302 and discharges them from the flushing port.

[0048] The beneficial effects of this embodiment are as follows:

[0049] The mixing section 403 creates a vortex within the water flow, facilitating initial mixing of the flocculant and water. The three containment chambers ensure a more uniform flocculant solution. The level gauge prevents solution overflow from the third chamber 423, avoiding waste. The flushing port allows for rinsing of the filter element 302 when the greywater filtration module 3 is not in use, reducing sediment buildup and extending its lifespan.

[0050] Example 3

[0051] This embodiment is the third embodiment of a flocculant dosing system for sewage treatment. As Figure 3 shown, the difference between this embodiment and the second embodiment is that the way of flushing the filter element 302 of the reclaimed water filtration module 3 is different.

[0052] Specifically, a first flow channel 311 and a second flow channel 312 are provided in the inner cavity of the housing 301. The two ends of the first flow channel 311 and the two ends of the second flow channel 312 are respectively connected to form a "mouth" shape. A third solenoid valve 305 is provided at the water inlet end of the first flow channel 311, and a fourth solenoid valve 306 is provided at the water inlet end of the second flow channel 312. The filter element 302 is located in the inner cavity of the first flow channel 311. The water inlet pipe 5 is connected to the connection section of the first flow channel 311 and the second flow channel 312. The third solenoid valve 305 and the fourth solenoid valve 306 are respectively located on both sides of the water inlet pipe 5. The water outlet pipe 6 is connected to the water outlet end of the first flow channel 311. The flushing port is connected to the first flow channel 311 and the outside of the housing 301, and the flushing port is located on one side of the side wall of the housing 301 close to the water inlet end of the first flow channel 311.

[0053] The working principle or working process of this embodiment is as follows:

[0054] When the reclaimed water filtration module 3 starts to work, the control module controls the first solenoid valve 303 and the third solenoid valve 305 to open, and the second solenoid valve 304 and the fourth solenoid valve 306 to close. The water flow in the water inlet pipe 5 enters the first flow channel 311, is filtered by the filter element 302, and then flows out along the water outlet pipe 6.

[0055] When the reclaimed water filtration module 3 does not need to be filtered, the control module controls the first solenoid valve 303 and the third solenoid valve 305 to close, and controls the second solenoid valve 304 and the fourth solenoid valve 306 to open and close periodically and synchronously. When the second solenoid valve 304 and the fourth solenoid valve 306 are opened, the water flow in the water inlet pipe 5 reversely flows into the first flow channel 311 along the second flow channel 312 and flushes the filter element 302 in the first flow channel 311, and the water flow can carry the impurities washed off from the filter element 302 and discharge them from the flushing port.

[0056] The beneficial effects of this embodiment are as follows:

[0057] Compared with the second embodiment, the flushing effect of the filter element 302 of the reclaimed water filtration module 3 in this embodiment is better when flushing the filter element 302.

[0058] Other technical features and beneficial effects of this embodiment are the same as those of the second embodiment.

[0059] Example 4

[0060] This embodiment is an example of a sludge dewatering system, including a centrifugal dewatering machine and a chemical supply module. The chemical supply module is a flocculant dosing system for wastewater treatment as described in any one of embodiments one to three. The inner cavity of the centrifugal dewatering machine is connected to the third inner cavity 423 through a chemical supply pipe, and a valve is provided on the chemical supply pipe.

[0061] The beneficial effects of this embodiment are as follows:

[0062] In this embodiment, the sludge dewatering system uses a pre-prepared flocculant solution to directly flush the sludge, preventing the sludge from carrying over the flocculant. Furthermore, the flocculant solution concentration is within the optimal range for use, enabling the sludge to achieve the best dewatering effect after flocculation and sedimentation.

[0063] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A flocculant dosing system for wastewater treatment, characterized in that, It includes a control module, a quantitative module (1), a dosing module (2), a greywater filtration module (3), and a dilution module (4); The quantitative module (1) is used to hold the flocculant and monitor the change in the amount of flocculant. The two ends of the dosing module (2) are respectively connected to the quantitative module (1) and the dilution module (4); The greywater filtration module (3) is provided with an inlet pipe (5) for connecting to a water source and an outlet pipe (6) connected to the dilution module (4); The dilution module (4) is equipped with a stirring section (401) for mixing flocculant and water; The control module is connected to the quantitative module (1), the dosing module (2), the greywater filtration module (3), and the dilution module (4).

2. The flocculant dosing system for wastewater treatment according to claim 1, characterized in that, The quantitative module (1) includes a container (101) for holding emulsion flocculant and a weighing part (102) for weighing the container (101). The weighing part (102) is connected to the control module, and the container (101) is located on the weighing part (102).

3. The flocculant dosing system for wastewater treatment according to claim 2, characterized in that, The dosing module (2) includes a diaphragm pump (201), the feed end of which is connected to the container (101) through a feed pipe (202), the discharge end of which is connected to the dilution module (4) through a discharge pipe (203), and the diaphragm pump (201) is connected to the control module.

4. The flocculant dosing system for wastewater treatment according to claim 2, characterized in that, The dilution module (4) includes a stirring tank (402), the stirring part (401) is located in the inner cavity of the stirring tank (402), and the dosing module (2) and the greywater filtration module (3) are both connected to the inner cavity of the stirring tank (402).

5. A flocculant dosing system for wastewater treatment according to claim 4, characterized in that, The dilution module (4) also includes a mixing section (403), which is installed on the top of the stirring tank (402). The mixing section (403) is inverted conical in shape, and the bottom of the mixing section (403) is provided with an outlet that communicates with the stirring tank (402). The dosing module (2) and the greywater filtration module (3) are both connected to the top of the side wall of the mixing section (403).

6. The flocculant dosing system for wastewater treatment according to claim 5, characterized in that, The mixing tank (402) is provided with a first partition and a second partition arranged in sequence. The first partition and the second partition divide the inner cavity of the mixing tank (402) into a first inner cavity (421), a second inner cavity (422) and a third inner cavity (423) in sequence. The first inner cavity (421), the second inner cavity (422) and the third inner cavity (423) are all provided with a stirring part (401). The mixing part (403) is installed on the top of the first inner cavity (421).

7. A flocculant dosing system for wastewater treatment according to claim 6, characterized in that, The third inner cavity (423) is also equipped with a liquid level monitor, which is fixedly installed in the third inner cavity (423) and is connected to the control module.

8. A flocculant dosing system for wastewater treatment according to claim 1, characterized in that, The greywater filtration module includes a housing (301) and a filter element (302). The inlet pipe (5) and the outlet pipe (6) are both installed on the housing (301) and communicate with the inner cavity of the housing (301). The filter element (302) is installed in the inner cavity of the housing (301).

9. A flocculant dosing system for wastewater treatment according to claim 8, characterized in that, The water outlet pipe (6) is equipped with a first solenoid valve (303), and the housing (301) is equipped with a flushing port that connects the inner cavity of the housing (301) to the outside. The flushing port is equipped with a second solenoid valve (304). Both the first solenoid valve (303) and the second solenoid valve (304) are connected to the control module.

10. A sludge dewatering system, characterized in that, It includes a centrifugal dewatering machine and a drug supply module. The drug supply module is a flocculant dosing system for wastewater treatment as described in any one of claims 1-9. The inner cavity of the centrifugal dewatering machine is connected to the dilution module (4) through a drug supply pipe, and the drug supply pipe is equipped with a valve.

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