A pre-coagulation device for sludge dewatering

Abstract

The utility model discloses a front -positioned coagulation device of sludge dewatering relates to sludge treatment technical field. The utility model discloses a sewage container and filter device, and the sewage container is used for providing the reaction place for the coagulation process before sludge dewatering, and the bottom of sewage container is provided with sewage import, and the top is provided with supernatant outlet and coagulation precipitation outlet, and coagulation precipitation outlet is lower than supernatant outlet, to export coagulation precipitation to sludge dewatering equipment, and supernatant outlet is used to discharge the supernatant after coagulation, and filter device is set up at supernatant outlet, is used to filter intercept coagulation precipitation in supernatant before discharging, compared with simple coagulation pipeline or coagulation jar, the utility model discloses increase filter sludge filtration and cement shunt function to improve sludge dewatering equipment processing capacity. Under the premise of same sewage treatment capacity, can reduce the operation energy consumption of sludge dewatering equipment, reduce sludge treatment process section investment cost and operating cost, realize the purpose of reducing cost and increasing benefit.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, and in particular to a pre-coagulation device for sludge dewatering. Background Technology

[0002] Existing sludge dewatering equipment requires coagulation pipelines or coagulation tanks at the front end to ensure that the wastewater is fully coagulated before entering the equipment, thereby achieving the purpose of sludge dewatering. However, existing coagulation pipelines or coagulation tanks have the following problems:

[0003] (i) It only plays a coagulation role, but the sewage still has to be fully fed into the sludge dewatering equipment for treatment, which reduces the sludge treatment effect and efficiency.

[0004] (ii) The selection of sludge dewatering equipment should leave a certain margin. If the sewage undergoes pre-coagulation and still enters the sludge dewatering equipment in full flow for treatment, the maximum potential of the sludge dewatering equipment will not be realized. Under the same operating cost, the sewage treatment volume will be reduced, resulting in a certain economic loss. Utility Model Content

[0005] The purpose of this invention is to provide a pre-coagulation device for sludge dewatering that not only has a coagulation function but also a filtration function. Compared with existing coagulation pipelines and coagulation tanks, it improves the sewage treatment capacity, sludge treatment effect and sludge treatment efficiency, while reducing the operating cost of sludge dewatering equipment and solving the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a pre-coagulation device for sludge dewatering, comprising:

[0008] A wastewater container is used to provide a reaction site for the coagulation process before sludge dewatering. The wastewater container has a wastewater inlet at the bottom and a supernatant outlet and a coagulation sedimentation outlet at the top. The coagulation sedimentation outlet is lower than the supernatant outlet so that the coagulation sediment can be discharged to the sludge dewatering equipment. The supernatant outlet is used to discharge the supernatant after coagulation.

[0009] A filtration device is installed at the outlet of the supernatant to filter and intercept the coagulation and sedimentation in the supernatant before the supernatant is discharged.

[0010] In some embodiments, the wastewater container includes:

[0011] A vertically arranged tank, wherein the wastewater inlet is provided at the bottom of the tank, the filter device is provided on the top side wall of the tank, the top of the tank is closed or allows wastewater to overflow, and the coagulation and sedimentation outlet is provided on the top side wall of the tank, and the coagulation and sedimentation outlet is lower than the filter device.

[0012] A transition container is fitted onto the top outside of the tank to enclose the filtration device. The transition container is higher than the coagulation and sedimentation outlet. A closed water storage cavity is formed between the transition container and the top of the tank. The closed water storage cavity is used to temporarily store the supernatant after filtration by the filtration device. The supernatant outlet is located on the transition container and communicates with the closed water storage cavity.

[0013] In some embodiments, the filtration device is an annular filter capable of intercepting the coagulated sediment. The annular filter is embedded in the top side wall of the tank, or the annular filter is integrally formed on the top side wall of the tank, or the top side wall of the tank has a water outlet hole, and the annular filter is fitted around the outer or inner wall of the water outlet hole area of ​​the tank.

[0014] In some embodiments, the pre-coagulation device for sludge dewatering further includes a filter screen washing mechanism, which includes:

[0015] A flushing pipe is disposed inside the transition container and located outside the annular filter screen; the inlet end of the flushing pipe is used to connect to the flushing water source, and the outlet end of the flushing pipe is provided with an outlet facing the annular filter screen.

[0016] A rinsing nozzle is located at the water outlet and is used to spray rinsing water onto the annular filter screen.

[0017] In some embodiments, the filter washing mechanism further includes a rotary drive mechanism disposed on the transition container;

[0018] The flushing pipe is a Z-shaped flushing pipe, which includes an inlet pipe section, a connecting pipe section, and an outlet pipe section connected in sequence. The outlet pipe section is located outside the annular filter screen, and the flushing nozzle is located on the side of the outlet pipe section facing the annular filter screen. The inlet pipe section passes through the top of the transition container and is rotatably engaged with the transition container. The inlet pipe section is used to connect to the flushing water source through a rotary joint.

[0019] The rotary drive mechanism is connected to the outer wall of the inlet pipe section and is used to drive the Z-shaped flushing pipe to rotate around the inlet pipe section so as to use the outlet pipe section to rotate and flush the annular filter screen.

[0020] In some embodiments, the transition container is also provided with an exhaust port.

[0021] In some embodiments, the transition container is also provided with an openable and closable cover.

[0022] In some embodiments, the coagulation sedimentation outlet is also connected to a downwardly inclined coagulation sedimentation discharge pipe, which is used to connect to the sludge inlet of the sludge dewatering equipment.

[0023] In some embodiments, the sewage inlet is connected to multiple sewage inlet pipes simultaneously, and each sewage inlet pipe is provided with a connecting flange for connecting to the sewage supply pipeline.

[0024] In some embodiments, the sewage inlet is simultaneously connected to two coaxially arranged sewage inlet pipes.

[0025] In some embodiments, the bottom of the tank is also provided with support legs to support the tank above the ground.

[0026] On the other hand, this utility model proposes the application of the aforementioned pre-coagulation device for sludge dewatering in sludge dewatering treatment.

[0027] The present invention achieves the following technical advantages over the prior art:

[0028] This utility model's pre-coagulation device for sludge dewatering, compared to simple coagulation pipelines or coagulation tanks, adds sludge filtration and cement diversion functions, thereby increasing the processing capacity of the sludge dewatering equipment. Under the premise of the same wastewater treatment capacity, it can reduce the operating energy consumption of the sludge dewatering equipment, reduce the investment and operating costs of the sludge treatment process, and achieve the goal of cost reduction and efficiency improvement. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the pre-coagulation device for sludge dewatering disclosed in an embodiment of the present utility model.

[0031] Figure 2 for Figure 1 Top view;

[0032] Figure 3 This is a schematic diagram of the sludge dewatering line of this utility model.

[0033] In the diagram: 100 - Pre-coagulation device for sludge dewatering; 200 - Sludge dewatering equipment; 300 - Equalization tank;

[0034] 1-Wastewater container; 11-Wastewater inlet; 12-Supernatant outlet; 13-Coagulation and sedimentation outlet; 14-Tank body; 15-Transition container; 151-Cover plate; 152-Hinge; 153-Vent hole; 16-Enclosed water storage chamber; 17-Support leg; 18-Coagulation and sedimentation discharge pipe; 19-Connecting flange;

[0035] 2- Filtration device;

[0036] 3-Flushing pipe; 31-Inlet pipe section; 32-Connecting pipe section; 33-Outlet pipe section;

[0037] 4- Rinse nozzle;

[0038] 5- Rotary drive mechanism. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] One of the objectives of this invention is to provide a pre-coagulation device for sludge dewatering. This pre-coagulation device not only has a coagulation function but also a filtration function. Compared with existing coagulation pipelines and coagulation tanks, it improves the sewage treatment capacity, sludge treatment effect, and sludge treatment efficiency, while reducing the operating cost of sludge dewatering equipment and solving the problems existing in the prior art.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] like Figure 1 and Figure 2As shown, this embodiment provides a pre-coagulation device 100 for sludge dewatering, which is installed at the front end of the sludge dewatering equipment 200 to pre-coagulate the wastewater before it enters the sludge dewatering equipment 200. The pre-coagulation device 100 for sludge dewatering includes a wastewater container 1 and a filtration device 2. The wastewater container 1 provides a reaction site for the wastewater coagulation process before sludge dewatering. The bottom of the wastewater container 1 is provided with a wastewater inlet 11, and the top is provided with a supernatant outlet 12 and a coagulation sedimentation outlet 13. The coagulation sedimentation outlet 13 is lower than the supernatant outlet 12 to discharge the coagulated sediment (i.e., sludge) to the sludge dewatering equipment 200. The supernatant outlet 12 is used to discharge the supernatant generated after coagulation. The filtration device 2 is set at the supernatant outlet 12 to filter and intercept the coagulated sediment in the supernatant before it is discharged, so as to ensure effective separation of water and sludge and prevent the coagulated sediment from being discharged with the supernatant, thereby improving sludge treatment efficiency.

[0044] Some feasible implementation methods, such as Figure 1 and Figure 2 As shown, the wastewater container 1 includes a vertically arranged tank 14 and a transition container 15. A wastewater inlet 11 is located at the bottom of the tank 14, and a filter device 2 is installed on the top side wall of the tank 14. The top of the tank 14 can be closed or configured to allow wastewater overflow. Specifically, allowing wastewater overflow can be achieved by either having the top of the tank 14 directly open, or by installing a filter screen at the top of the tank 14 capable of intercepting coagulation and sedimentation, allowing only the supernatant to pass through. When a filter screen is installed at the top of the tank 14, it is equivalent to having a supernatant filtration device installed on both the top side wall and the top end of the tank 14, increasing the supernatant discharge flow rate while ensuring the separation effect between the supernatant and the coagulation and sedimentation (sludge). A coagulation and sedimentation outlet 13 is located on the top side wall of the tank 14, and the coagulation and sedimentation outlet 13 is lower than the aforementioned filter device 2. The transition container 15 is fitted onto the top outer side of the tank body 14 to completely enclose the entire filter device 2. The transition container 15 is higher than the coagulation sedimentation outlet 13. A closed water storage cavity 16 is formed between the transition container 15 and the top outer wall of the tank body 14. The closed water storage cavity 16 is used to temporarily store the supernatant after filtration by the filter device 2. The supernatant outlet 12 is set on the transition container 15 and communicates with the closed water storage cavity 16 to discharge the filtered supernatant in a timely manner.

[0045] In some feasible embodiments, the tank 14 is preferably cylindrical, including but not limited to existing reaction vessel containers. The transition container 15 is, but not limited to, a cylindrical or prismatic container, preferably coaxially arranged with the tank 14 to ensure constant fluid pressure within the closed water storage chamber 16. When both the transition container 15 and the tank 14 are cylindrical containers, the closed water storage chamber 16 between them is an annular cavity. The transition container 15 may be equipped with one or more supernatant outlets 12 according to the supernatant discharge requirements, and any one of the supernatant outlets 12 may be equipped with a valve to control the opening and closing of the supernatant outlet 12.

[0046] In some feasible embodiments, the filter device 2 is preferably an annular filter capable of intercepting coagulation and sedimentation. The annular filter includes, but is not limited to, wedge-shaped meshes. Wedge-shaped meshes are an existing filter structure, and their specific structure and functional principles will not be elaborated here. In actual production and use, the annular filter can be embedded and fixed to the top side wall of the tank 14 by means of clamping, bonding, etc., thereby connecting it to the tank 14 as a whole. Alternatively, the annular filter can also be directly integrally formed on the top side wall of the tank 14, that is, by uniformly opening filter holes along the circumference of the top side wall of the tank 14 to form an annular filter; alternatively, water outlet holes can be opened on the top side wall of the tank 14, and the annular filter can be fitted around the outer or inner wall of the water outlet area of ​​the tank 14, with the annular filter connected to the tank 14 as a whole by bolts or bonding. Figure 1 and Figure 2 The diagram shows a schematic of a ring-shaped filter screen embedded and fixed to the top side wall of the tank 14.

[0047] In some feasible implementations, to avoid clogging of the filter screen after long-term filtration, which would affect cement separation efficiency, a filter screen washing mechanism is also provided in the pre-coagulation device 100 for sludge dewatering. The filter screen washing mechanism includes a washing pipe 3 and a washing nozzle 4. The washing pipe 3 is located inside the transition container 15 and outside the annular filter screen. The inlet end of the washing pipe 3 is used to connect to the washing water source, and the outlet end of the washing pipe 3 is provided with an outlet facing the annular filter screen. The washing nozzle 4 is located at the outlet and is used to spray washing water onto the annular filter screen to wash the annular filter screen from the outside to the inside, flushing the clogged sludge back into the tank 14. The washing pipe 3 is preferably a plastic or metal pipe, and the washing nozzle 4 can be a common high-pressure nozzle.

[0048] In some feasible implementations, the flushing pipe 3 can be directly fixed inside the transition container 15, or it can be movably installed inside the transition container 15 for dynamic flushing. For example... Figure 1 and Figure 2As shown, the filter washing mechanism also includes a rotary drive mechanism 5, which is mounted on the transition container 15. The washing pipe 3 is a Z-shaped washing pipe, which includes an inlet pipe section 31, a connecting pipe section 32, and an outlet pipe section 33 connected in sequence. The inlet pipe section 31 and the outlet pipe section 33 are parallel and both parallel to the axial direction of the tank body 14. The outlet pipe section 33 is located on the outside of the annular filter screen, and the washing nozzle 4 is located on the side of the outlet pipe section 33 facing the annular filter screen. The inlet pipe section 31 passes through the top of the transition container 15 and is rotatably engaged with the transition container 15. The inlet pipe section 31 is used to connect to the washing water source through a rotary joint to ensure that when the Z-shaped washing pipe rotates, the outlet pipe of the washing water source can still maintain a sealed connection with the inlet pipe section 31 of the Z-shaped washing pipe, and will not twist due to the rotation of the Z-shaped washing pipe. The rotary drive mechanism 5 is connected to the outer wall of the inlet pipe section 31 and is used to drive the Z-shaped flushing pipe to rotate around the inlet pipe section 31, so as to use the outlet pipe section 33 to rotate and flush the annular filter screen. The rotary joint can be a commonly available rotary joint; the rotary drive mechanism 5 preferably uses a motor assembly, which includes a motor and a reducer connected to the motor. The reducer is located on the top outer side of the transition container 15, and its output end is connected to a drive gear. The inlet pipe section 31 is rotatably connected to the top wall of the transition container 15 via bearings. The portion of the inlet pipe section 31 extending outside the transition container 15 is fitted with a driven gear that meshes with the drive gear. When the motor is turned on, the meshing rotation of the drive gear and driven gear drives the Z-shaped flushing pipe to rotate around the annular filter screen. To improve flushing efficiency, multiple flushing nozzles 4 can be spaced apart along the length of the outlet pipe section 33.

[0049] In some feasible implementations, the transition container 15 is also provided with an exhaust port 153 and an openable and closable cover plate 151. The cover plate 151 is part of the top cover of the transition container 15, and it is hinged to the fixed part of the top cover of the transition container 15 via a hinge 152, so that the cover plate 151 can be opened and closed. Opening the cover plate 151 forms an observation window on the top of the transition container 15, so that the staff can check the water output status inside the transition container 15 and the clogging and flushing status of the filter screen in real time. The flushing pipe, flushing nozzle, etc. can also be replaced or maintained by opening the cover plate 151, which increases the flexibility and convenience of the equipment.

[0050] In some feasible implementations, the coagulation sedimentation outlet 13 is also connected to a downwardly inclined coagulation sedimentation discharge pipe 18, which is used to connect to the sludge inlet of the sludge dewatering equipment. The downward inclination of the coagulation sedimentation discharge pipe 18 facilitates the smooth discharge of coagulated sediment by its own weight, thus preventing sludge blockage at the coagulation sedimentation outlet 13.

[0051] In some feasible implementations, the sewage inlet 11 can be connected to multiple sewage inlet pipes simultaneously, and each sewage inlet pipe is equipped with a connecting flange 19. The connecting flange 19 is used to connect to a sewage supply pipeline (the sewage to be treated is transported to the sewage inlet 11 through this sewage supply pipeline). Figure 1 As shown, the sewage inlet 11 is connected to two coaxially arranged sewage inlet pipes, forming a two-way structure. Sewage can be simultaneously transported into the container through the two sewage inlet pipes, which can increase the sewage treatment capacity.

[0052] In some feasible embodiments, the bottom of the tank 14 is also provided with support legs 17 to support the tank 14 above the ground. Two support legs 17 may be symmetrically arranged, or three to five may be evenly arranged around the circumference of the tank 14.

[0053] The aforementioned pre-coagulation device 100 for sludge dewatering is mainly used in sludge dewatering treatment. During operation, wastewater enters the device through a wastewater supply pipeline, and coagulant is injected through a dosing port on the pipeline, achieving pre-mixing of the coagulant and wastewater before they enter the tank 14. After entering the tank 14, the coagulant and wastewater flow from bottom to top. During this flow, the wastewater and coagulant react fully to form flocs (i.e., coagulation sedimentation). Wastewater containing flocs overflows from the top of the tank 14. The heavier flocs flow from the coagulation sedimentation outlet 13 into the sludge dewatering equipment 200. The supernatant is filtered by an annular filter and discharged from the supernatant outlet 12 to the equalization tank 300. A timed, intermittently activated rotary drive mechanism can flush the sludge and other suspended solids accumulated during the annular filter filtration process from the outside in.

[0054] Compared to simple coagulation pipelines or coagulation tanks, the aforementioned pre-coagulation device 100 for sludge dewatering adds sludge filtration and cement diversion functions, thereby increasing the processing capacity of the sludge dewatering equipment. Under the same wastewater treatment capacity, it can reduce the operating energy consumption of the sludge dewatering equipment 200, reduce the investment and operating costs of the sludge treatment process, and achieve the goal of cost reduction and efficiency improvement.

[0055] Example 2

[0056] like Figure 3 As shown, this embodiment proposes a sludge dewatering line, including a sludge dewatering device 200 and a pre-coagulation device 100 for sludge dewatering in Embodiment 1. The pre-coagulation device 100 for sludge dewatering is connected to the sludge inlet of the sludge dewatering device 200 through a coagulation sedimentation outlet 13.

[0057] The sludge dewatering line also includes an equalization tank 300, with the supernatant outlet 12 connected to the equalization tank 300. The equalization tank 300 is a common structure in the field and will not be described in detail here.

[0058] Wastewater enters the device through the wastewater supply pipeline. Coagulant is injected through the dosing port on the pipeline, pre-mixing the coagulant and wastewater before they enter tank 14. After entering tank 14, the coagulant and wastewater flow from bottom to top. During this flow, the wastewater and coagulant react fully to form flocs (i.e., coagulation sedimentation). Wastewater containing flocs overflows from the top of tank 14. The heavier flocs flow from the coagulation sedimentation outlet 13 into the sludge dewatering equipment 200. The supernatant is filtered by a ring filter and discharged from the supernatant outlet 12 to the equalization tank 300. A timed, intermittently activated rotary drive mechanism can flush the sludge and other suspended solids accumulated during the ring filter filtration process from the outside in.

[0059] Compared to simple coagulation pipelines or coagulation tanks, the aforementioned pre-coagulation device 100 for sludge dewatering adds sludge filtration and cement diversion functions, thereby increasing the processing capacity of the sludge dewatering equipment. Under the same wastewater treatment capacity, it can reduce the operating energy consumption of the sludge dewatering equipment 200, reduce the investment and operating costs of the sludge treatment process, and achieve the goal of cost reduction and efficiency improvement.

[0060] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0061] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pre-coagulation device for sludge dewatering, characterized in that, include: A wastewater container is used to provide a reaction site for the coagulation process before sludge dewatering. The wastewater container has a wastewater inlet at the bottom and a supernatant outlet and a coagulation sedimentation outlet at the top. The coagulation sedimentation outlet is lower than the supernatant outlet so that the coagulation sediment can be discharged to the sludge dewatering equipment. The supernatant outlet is used to discharge the supernatant after coagulation. A filtration device is installed at the outlet of the supernatant to filter and intercept the coagulation and sedimentation in the supernatant before the supernatant is discharged.

2. The pre-coagulation device for sludge dewatering according to claim 1, characterized in that, The wastewater container includes: A vertically arranged tank, wherein the wastewater inlet is provided at the bottom of the tank, the filter device is provided on the top side wall of the tank, the top of the tank is closed or allows wastewater to overflow, and the coagulation and sedimentation outlet is provided on the top side wall of the tank, and the coagulation and sedimentation outlet is lower than the filter device. A transition container is fitted onto the top outside of the tank to enclose the filtration device. The transition container is higher than the coagulation and sedimentation outlet. A closed water storage cavity is formed between the transition container and the top of the tank. The closed water storage cavity is used to temporarily store the supernatant after filtration by the filtration device. The supernatant outlet is located on the transition container and communicates with the closed water storage cavity.

3. The pre-coagulation device for sludge dewatering according to claim 2, characterized in that, The filtration device is an annular filter capable of intercepting the coagulation and sedimentation. The annular filter is embedded in the top side wall of the tank, or the annular filter is integrally formed on the top side wall of the tank, or the top side wall of the tank has a water outlet hole, and the annular filter is wrapped around the outer or inner wall of the water outlet hole area of ​​the tank.

4. The pre-coagulation device for sludge dewatering according to claim 3, characterized in that, It also includes a filter washing mechanism, which comprises: A flushing pipe is disposed inside the transition container and located outside the annular filter screen; the inlet end of the flushing pipe is used to connect to the flushing water source, and the outlet end of the flushing pipe is provided with an outlet facing the annular filter screen. A rinsing nozzle is located at the water outlet and is used to spray rinsing water onto the annular filter screen.

5. The pre-coagulation device for sludge dewatering according to claim 4, characterized in that, The filter washing mechanism further includes a rotary drive mechanism, which is disposed on the transition container; The flushing pipe is a Z-shaped flushing pipe, which includes an inlet pipe section, a connecting pipe section, and an outlet pipe section connected in sequence. The outlet pipe section is located outside the annular filter screen, and the flushing nozzle is located on the side of the outlet pipe section facing the annular filter screen. The inlet pipe section passes through the top of the transition container and is rotatably engaged with the transition container. The inlet pipe section is used to connect to the flushing water source through a rotary joint. The rotary drive mechanism is connected to the outer wall of the inlet pipe section and is used to drive the Z-shaped flushing pipe to rotate around the inlet pipe section so as to use the outlet pipe section to rotate and flush the annular filter screen.

6. The pre-coagulation device for sludge dewatering according to any one of claims 2 to 5, characterized in that, The transition container is also provided with an exhaust port.

7. The pre-coagulation device for sludge dewatering according to any one of claims 2 to 5, characterized in that, The transition container is also equipped with an openable and closable cover.

8. The pre-coagulation device for sludge dewatering according to any one of claims 1 to 5, characterized in that, The coagulation sedimentation outlet is also connected to a downward-sloping coagulation sedimentation discharge pipe, which is used to connect to the sludge inlet of the sludge dewatering equipment.

9. The pre-coagulation device for sludge dewatering according to any one of claims 1 to 5, characterized in that, The sewage inlet is connected to multiple sewage inlet pipes, and each sewage inlet pipe is equipped with a connecting flange for connecting to the sewage supply pipeline.

10. The pre-coagulation device for sludge dewatering according to any one of claims 2 to 5, characterized in that, The bottom of the tank is also provided with support legs to support the tank above the ground.

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