PAM-containing sludge filtrate recycling system
By constructing a PAM sludge filtrate reuse system, the problem of not being able to recycle PAM filtrate that has not fully exerted its function has been solved, realizing the recycling of the reagent, reducing costs and the difficulty of sewage treatment, and improving the stability and efficiency of the sludge treatment system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JIADING NEW TOWN SEWAGE TREATMENT CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-07-24
AI Technical Summary
In existing technologies, PAM filtrate that has not fully exerted its effects cannot be recycled, resulting in waste of reagents, affecting wastewater treatment efficiency and increasing costs.
A PAM-containing sludge filtrate reuse system is constructed, including a drying workshop, a well, a water tank, and a sludge storage pond. A closed-loop reuse path is constructed through an inlet pipe, a delivery pipe, and an overflow pipe to achieve precise collection, temporary storage, and return of the filtrate. Combined with a delivery pump and a flow regulating valve, stable delivery and control are ensured.
This enables the recycling of PAM agents, reduces the amount of new agents required, decreases agent costs and wastewater treatment difficulty, and improves the stability and efficiency of the sludge treatment system.
Smart Images
Figure CN224548276U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of industrial wastewater treatment, and in particular to a PAM-containing sludge filtrate reuse system. Background Technology
[0002] In the fields of industrial wastewater treatment and solid waste disposal, sludge drying is a key step in achieving sludge reduction and stabilization, and is widely used in municipal wastewater treatment plants, industrial wastewater treatment stations, and other scenarios. Among these, centrifugal dewatering technology has become the mainstream choice for current plant sludge drying systems due to its advantages such as high treatment efficiency and convenient operation. To improve sludge flocculation and enhance dewatering efficiency, polyacrylamide (PAM), a highly efficient polymeric flocculant, is commonly added to the sludge in existing centrifugal dewatering processes. PAM can rapidly aggregate sludge particles through adsorption and bridging to form larger flocs, thereby accelerating solid-liquid separation, reducing the moisture content of the dewatered sludge, and laying the foundation for subsequent drying processes.
[0003] In the above process flow, after centrifugal dewatering, the system separates two main products: first, sludge with reduced moisture content, which will directly enter the subsequent sludge drying process (such as hot air drying, low temperature drying, etc.) to eventually form dry sludge cakes for resource utilization or harmless disposal; second, filtrate containing incompletely reacted PAM. Because this filtrate contains residual chemicals, the current industry practice is to directly discharge it into the wastewater treatment system inlet, mix it with other wastewater generated in the plant, and then proceed to the wastewater treatment processes such as screens, equalization tanks, and biological reaction tanks for unified treatment. However, the conventional treatment process for PAM-containing sludge filtrate has significant technical drawbacks. PAM, as a high-cost polymeric flocculant, requires strict control of its dosage during sludge centrifugation to ensure dewatering effectiveness. The existing process directly discharges filtrate containing residual PAM into the wastewater treatment system, meaning that the incompletely reacted PAM cannot be recycled. The discharge of PAM into the wastewater treatment system causes flocculants to form in the pretreatment stage, thus affecting the efficiency of subsequent wastewater treatment. This not only wastes the initial PAM reagent but also increases the efficiency of subsequent wastewater treatment, which is inconsistent with the industry development trend of energy conservation, environmental protection, and resource recycling. Utility Model Content
[0004] In view of the above-mentioned prior art, in order to solve the problem that the filtrate of PAM that has not fully exerted its function cannot be recycled and reused, resulting in the waste of PAM reagent, this application provides a PAM-containing sludge filtrate recycling system.
[0005] This application provides a PAM-containing sludge filtrate reuse system, which adopts the following technical solution: A PAM-containing sludge filtrate reuse system includes a sludge storage tank for temporarily storing sludge to be treated, a conditioning tank for chemically conditioning the sludge in the storage tank, a drying workshop for dewatering the sludge, and a conveying device for transporting the conditioned sludge to the drying workshop. It also includes a filtrate recovery assembly, which includes a well and a tank for storing residual PAM filtrate. The well has an inlet pipe for the residual PAM sludge filtrate to enter; one end of the inlet pipe is connected to the inside of the well, and the other end is connected to the filtrate outlet of a centrifuge in the drying workshop. A conveying pipe is installed on the well, one end of which is connected to the inside of the well, and the other end is connected to the storage tank. The tank is installed on the conveying pipe and is connected to the conveying pipe.
[0006] By adopting the above technical solution, a closed-loop reuse path for PAM-containing filtrate was constructed, consisting of a drying workshop, a well, a water tank, and a sludge storage tank. Filtrate containing residual PAM, separated by a centrifuge in the drying workshop, is precisely introduced into the well via an inlet pipe for initial collection, and then transported to the water tank for temporary storage via a delivery pipe. The water tank buffers flow fluctuations during filtrate transport, preventing a sudden increase in pressure in the reuse system due to excessive instantaneous filtrate volume. It also stores filtrate in the sludge storage tank when replenishment is not needed, preventing reagent waste. Finally, the PAM-containing filtrate temporarily stored in the water tank flows back to the sludge storage tank via the delivery pipe, where it is thoroughly mixed with the sludge to be treated. The residual PAM continues to play a flocculating role, aiding subsequent sludge conditioning and dewatering processes. This achieves the recycling of PAM reagents, significantly reducing the amount of new PAM added, reducing reagent costs, and decreasing the amount of PAM-containing filtrate directly discharged into the wastewater treatment system, thus reducing reagent consumption and treatment difficulty in subsequent wastewater treatment processes.
[0007] Preferably, the system also includes a conveying device for transporting the conditioned sludge to the drying workshop, the conveying device being a conveying pump, and the conditioned tank and the drying workshop being connected by the conveying pump.
[0008] By adopting the above technical solution, the transfer pump can provide stable and sufficient power, ensuring that the conditioned sludge can be efficiently and continuously transported from the conditioning tank to the drying workshop. Compared with the traditional gravity conveying method, the transfer pump is not affected by terrain differences or changes in sludge concentration. Even if the conditioned sludge becomes more viscous due to the addition of chemicals, it can still maintain stable conveying efficiency, avoiding sludge deposition and blockage in the conveying pipeline, ensuring the smoothness of the entire sludge treatment process, providing a stable supply of sludge raw materials for the subsequent centrifugal dewatering process in the drying workshop, and improving the overall operational stability and treatment efficiency of the treatment system.
[0009] Preferably, the well is also equipped with an overflow pipe, the inlet of which is connected to the inside of the well, and the outlet of which is connected to the inlet of the sewage treatment system.
[0010] By adopting the above technical solution, the overflow pipe constructs a safety redundancy and emergency discharge channel for the reuse system. When the PAM sludge filtrate recovery component malfunctions, such as blockage of the delivery pipe preventing the filtrate in the well from being properly transported to the sludge storage tank, or when the drying workshop generates a large amount of filtrate that exceeds the temporary storage and reuse capacity of the well and tank, the liquid level in the well will continuously rise. At this time, the excess PAM-containing filtrate can be automatically discharged into the wastewater treatment system through the overflow pipe for treatment, preventing the filtrate from overflowing from the top of the well and causing secondary pollution to the plant environment. It also prevents excessive filtrate from accumulating in the reuse system, which could lead to equipment damage, and ensures the safe and stable operation of the entire system.
[0011] Preferably, a baffle wall is provided inside the well, which divides the inner cavity of the well into an outlet cavity and an overflow cavity. The inlet of the overflow pipe is located in the overflow cavity, and the end of the overflow pipe located in the overflow cavity is lower than the top of the baffle wall, and the top of the baffle wall is lower than the height of the well.
[0012] By adopting the above technical solution, the retaining wall design achieves a functional zoning of the well's filtrate, prioritizing reuse and allowing for overflow in excess. After PAM-containing filtrate enters the well, it first accumulates in the effluent chamber, preferentially flowing through the delivery pipe into the water tank and then back to the sludge storage tank for reuse, maximizing the recycling of residual PAM. When the amount of filtrate in the effluent chamber exceeds the reuse requirement, the liquid level rises to the top of the retaining wall and flows into the overflow chamber. At this point, the filtrate in the overflow chamber is discharged to the wastewater treatment system through the overflow pipe. Simultaneously, the overflow pipe inlet is lower than the top of the retaining wall. When filtrate enters the overflow chamber, if the liquid level in the overflow chamber is higher than the overflow pipe, the filtrate will be discharged into the wastewater treatment system through the overflow pipe. This ensures that a certain amount of filtrate accumulates in the overflow chamber before discharge, preventing overflow triggered by a small amount of filtrate, further improving the PAM reuse rate and reducing unnecessary discharge. In addition, the retaining wall can also buffer and settle the filtrate entering the well, preventing a small amount of sludge particles carried in the filtrate from entering the outlet chamber, reducing the risk of blockage in the delivery pipe and water tank, and ensuring the stable operation of the reuse system.
[0013] Preferably, the top height of the retaining wall is lower than the maximum liquid level height of the water tank.
[0014] By adopting the above technical solution, the top height of the baffle wall is lower than the maximum liquid level of the water tank, forming a liquid level difference protection mechanism to avoid the "liquid backflow" problem in the reuse system. When the filtrate in the water tank reaches its maximum level, the liquid level pressure on the tank side will be greater than the liquid level pressure in the well outlet chamber. If the top height of the baffle wall is higher than or equal to the maximum liquid level of the water tank, the filtrate in the well may not be able to smoothly enter the water tank due to the pressure difference, or even backflow of the filtrate from the water tank back into the well. However, if the top height of the baffle wall is lower than the maximum liquid level of the water tank, it can be ensured that when the water tank is not full, the filtrate in the well outlet chamber can always flow smoothly into the water tank under the action of the liquid level difference, ensuring the smoothness of the reuse process. At the same time, when the water tank reaches its maximum level, the liquid level in the well outlet chamber will rise rapidly and exceed the top of the baffle wall, causing excess filtrate to enter the overflow chamber for discharge, avoiding the risk of overflow caused by excessively high liquid levels in the well, and further optimizing the liquid level control logic of the system.
[0015] Preferably, there are two sludge storage tanks, and two branch pipes connected to the sludge storage tanks are provided at the end of the conveying pipe away from the water well.
[0016] By adopting the above technical solution, the design of dual sludge storage tanks and branch pipes enhances the system's flexibility and processing capacity. In actual operation, the two sludge storage tanks can be used alternately: when the sludge in one tank is in a state of needing conditioning or transportation, PAM-containing filtrate can be added to the other tank through the corresponding branch pipe, avoiding interruption of reuse due to the full-load operation of a single tank; at the same time, if one tank experiences equipment failure or requires cleaning and maintenance, the other tank can continue to receive filtrate normally, ensuring the continuity of the entire reuse system.
[0017] Preferably, a flow regulating valve is installed on the delivery pipe, and the flow regulating valve is located near the outlet of the water tank.
[0018] By adopting the above technical solution, the flow regulating valve achieves precise control of PAM-containing filtrate reuse. The amount and concentration of sludge to be treated in the sludge storage tank will dynamically change with the treatment batch, and the required PAM dosage also needs to be adjusted accordingly: when the amount and concentration of sludge in the sludge storage tank are large, the opening of the flow regulating valve can be increased to increase the filtrate delivery volume, utilizing more residual PAM to accelerate sludge flocculation and sedimentation, and improve subsequent conditioning efficiency; when the amount and concentration of sludge are small, the valve opening can be reduced to decrease filtrate delivery, avoiding excessive sludge flocculation and agglomeration due to excessive PAM, which would negatively affect the chemical conditioning effect of the conditioning tank and even cause pipe blockage. The flow regulating valve is located near the water tank outlet, which can quickly respond to changes in the demand of the sludge storage tank, reduce the residence time of the filtrate in the delivery pipe, and ensure that the adjusted flow rate can act on the sludge in the sludge storage tank in a timely manner, further improving control accuracy and ensuring that each batch of sludge can be matched with the optimal PAM dosage, maximizing the efficiency of reagent utilization.
[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. A closed-loop recycling path for PAM-containing filtrate was constructed, consisting of a drying workshop, a well, a water tank, and a sludge storage tank. Filtrate containing residual PAM, separated by a centrifuge in the drying workshop, is precisely introduced into a well via an inlet pipe for initial collection, and then transported to a water tank for temporary storage via a delivery pipe. The water tank buffers flow fluctuations during filtrate transport, preventing a sudden increase in pressure in the recycling system due to excessive instantaneous filtrate volume. It also stores filtrate in the sludge storage tank when replenishment is not needed, preventing reagent waste. Finally, the PAM-containing filtrate temporarily stored in the water tank flows back to the sludge storage tank via a delivery pipe, where it is thoroughly mixed with the sludge to be treated. The residual PAM continues to play a flocculation role, aiding subsequent sludge conditioning and dewatering processes. This achieves the recycling of PAM reagents, significantly reducing the amount of new PAM added, reducing reagent costs, and decreasing the amount of PAM-containing filtrate directly discharged into the wastewater treatment system. This reduces reagent consumption and treatment difficulty in subsequent wastewater treatment processes, meeting the industry's requirements for energy conservation, environmental protection, and resource recycling. 2. The baffle wall design achieves a "priority reuse, excess overflow" functional zoning of the filtrate within the well. After PAM-containing filtrate enters the well, it first accumulates in the effluent chamber, preferentially flowing through the delivery pipe into the water tank and then back to the sludge storage tank for reuse, maximizing the recycling of residual PAM. When the filtrate volume in the effluent chamber exceeds the reuse requirement, the liquid level rises to the top of the baffle wall and flows into the overflow chamber through gaps. At this point, the filtrate in the overflow chamber is discharged to the wastewater treatment system through the overflow pipe. Simultaneously, the overflow pipe inlet is lower than the top of the baffle wall, ensuring that a certain amount of filtrate accumulates in the overflow chamber before discharge, preventing overflow triggered by small amounts of filtrate, further improving the PAM reuse rate and reducing unnecessary discharge. Furthermore, the baffle wall also acts as a buffer and sedimentation mechanism for the filtrate entering the well, preventing small amounts of sludge particles entrained in the filtrate from entering the effluent chamber, reducing the risk of blockage in the delivery pipe and water tank, and ensuring the stable operation of the reuse system. 3. The top height of the baffle wall is lower than the maximum liquid level of the water tank, forming a liquid level difference protection mechanism to avoid the "liquid backflow" problem in the reuse system. When the filtrate in the water tank reaches the maximum liquid level, the liquid level pressure on the tank side will be greater than the liquid level pressure in the well outlet chamber. If the top height of the baffle wall is higher than or equal to the maximum liquid level of the water tank, the filtrate in the well may not be able to smoothly enter the water tank due to the pressure difference, or even backflow of the filtrate in the water tank back into the well. However, the top height of the baffle wall is lower than the maximum liquid level of the water tank, which ensures that when the water tank is not full, the filtrate in the well outlet chamber can always flow smoothly into the water tank under the action of the liquid level difference, ensuring the smoothness of the reuse process. At the same time, when the water tank reaches the maximum liquid level, the liquid level in the well outlet chamber will rise rapidly and exceed the top of the baffle wall, causing the excess filtrate to enter the overflow chamber for discharge, avoiding the risk of overflow caused by excessive liquid level in the well, and further optimizing the liquid level control logic of the system. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the workflow of this utility model; Figure 2 This utility model is a schematic diagram showing the overall structure of the filtrate recovery component; Figure 3 This is a top view of the filtrate recovery assembly of this utility model.
[0021] Reference numerals: 1. Sludge storage tank; 2. Conditioning tank; 3. Drying workshop; 4. Conveying component; 41. Conveying pump; 5. Filtrate recovery assembly; 51. Water well; 511. Water outlet chamber; 512. Overflow chamber; 52. Water tank; 6. Inlet pipe; 7. Conveying pipe; 8. Flow regulating valve; 9. Overflow pipe; 10. Retaining wall; 101. First vertical plate; 102. Second vertical plate. Detailed Implementation
[0022] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0023] This application discloses a PAM-containing sludge filtrate reuse system.
[0024] Reference Figure 1 A PAM-containing sludge filtrate reuse system includes a sludge storage tank 1, a conditioning tank 2, a drying workshop 3, a conveying component 4, and a filtrate recovery component 5. The outlet of the sludge storage tank 1 is connected to the inlet of the conditioning tank 2 via a pipeline, and the sludge storage tank 1 is used to temporarily store sludge to be treated. The outlet of the conditioning tank 2 is connected to the drying workshop 3 via a pipeline, and the conditioning tank 2 is used to chemically condition the sludge in the sludge storage tank 1. The conveying component 4 is installed on the pipeline between the conditioning tank 2 and the drying workshop 3. The conveying component 4 is a conveying pump 41, which is used to transport the conditioned sludge to the drying workshop 3. The filtrate recovery component 5 is located outside the drying workshop 3 and is used to collect, temporarily store, and directionally transport the sludge filtrate containing residual PAM separated by the centrifuge in the drying workshop 3.
[0025] Reference Figure 2 and Figure 3The drying workshops 3 and 4 are a new drying workshop and an old drying workshop, respectively. The conditioning tank 2 is connected to the new drying workshop and the old drying workshop through pipelines. The filtrate recovery assembly 5 is set between the new drying workshop and the old drying workshop. The filtrate recovery assembly 5 includes a well 51 and a water tank 52. The top of the well 51 is open. One side of the well 51 is provided with an inlet pipe 6 for the residual PAM filtrate from the new and old drying workshops to enter. One end of the inlet pipe 6 is connected to the inside of the well 51. The end of the inlet pipe 6 away from the well 51 is connected to the filtrate outlet of the centrifuge in the new and old drying workshops. A conveying pipe 7 is set on the side of the well 51 away from the inlet pipe 6. One end of the conveying pipe 7 is connected to the inside of the well 51. The end of the conveying pipe 7 away from the well 51 is connected to the inside of the sludge storage tank 1. The water tank 52 is set on the conveying pipe 7 between the well 51 and the sludge storage tank 1, and the conveying pipe 7 is connected to the inside of the water tank 52. The water tank 52 is used to temporarily store the PAM filtrate.
[0026] A flow regulating valve 8 is installed on the conveying pipe 7 between the water tank 52 and the sludge storage tank 1. The amount and concentration of sludge to be treated temporarily stored in the sludge storage tank 1 will vary with the batch of treatment (such as fluctuations in the amount of sludge collected from the plant at different times and differences in sludge moisture content), and the required PAM dosage needs to be dynamically adjusted. The amount of PAM-containing filtrate delivered to the sludge storage tank 1 can be flexibly controlled by the flow regulating valve 8.
[0027] When the sludge volume in sludge storage tank 1 is large and the concentration is high, the valve opening is increased to increase the filtrate delivery volume, utilizing more residual PAM to accelerate sludge flocculation and sedimentation; when the sludge volume is small and the concentration is low, the valve opening is decreased to reduce filtrate delivery, avoiding excessive sludge flocculation and clumping due to excessive PAM, which would negatively affect the chemical conditioning effect of subsequent conditioning tank 2, ensuring that each batch of sludge can be matched with the optimal PAM dosage, thereby improving the overall treatment efficiency.
[0028] An overflow pipe 9 is also provided on the side wall of the water well 51 away from the inlet pipe 6. The overflow pipe 9 is spaced apart from the delivery pipe 7. The inlet pipe of the overflow pipe 9 is connected to the inside of the water well 51, and the outlet end of the overflow pipe 9 is connected to the external sewage treatment system. A baffle wall 10 is fixedly installed inside the water well 51. The baffle wall 10 divides the inner cavity of the water well 51 into an outlet cavity 511 and an overflow cavity 512. The inlet end of the overflow pipe 9 is connected to the inside of the overflow cavity 512. The retaining wall 10 includes a first vertical plate 101 and a second vertical plate 102. One side of the first vertical plate 101 is fixedly connected to the inner wall of the well 51, and one side of the second vertical plate 102 is fixedly connected to the inner wall of the well 51 near the overflow pipe 9. The sides of the first vertical plate 101 and the second vertical plate 102 away from the inner wall of the well 51 are fixedly connected. The first vertical plate 101 and the second vertical plate 102 are L-shaped. The overflow cavity 512 is formed by the first vertical plate 101, the second vertical plate 102 and the inner wall of the well 51.
[0029] The top of the retaining wall 10 is lower than the height of the well 51, and the end of the overflow pipe 9 located in the overflow chamber 512 is lower than the top of the retaining wall 10. The top of the retaining wall 10 is lower than the height of the well 51, and the inlet of the overflow pipe 9 is lower than the top of the retaining wall 10, forming a priority reuse path for the well 51, the outlet chamber 511, the conveying pipe 7, the water tank 52, and the sludge storage tank 1. Under normal operating conditions, the PAM-containing filtrate generated by the new and old drying workshops enters the well 51, accumulates in the outlet chamber 511, enters the water tank 52 via the conveying pipe 7 for temporary storage, and is then transported to the sludge storage tank 1 for reuse, rather than directly entering the overflow chamber 512. When the liquid level in the outlet chamber 511 rises above the top of the retaining wall 10, the filtrate overflows into the overflow chamber 512 and is finally discharged through the overflow pipe 9, ensuring that most of the PAM-containing filtrate is preferentially used for sludge settling, fully utilizing the residual PAM and reducing reagent waste.
[0030] The top height of the retaining wall 10 is lower than the maximum liquid level of the water tank 52. When the filtrate in the water tank 52 is stored to the maximum liquid level, the filtrate in the water outlet chamber 511 of the water well 51 cannot flow smoothly into the water tank 52 due to the liquid level pressure on the side of the water tank 52. As a result, the liquid level in the water outlet chamber 511 rises rapidly to above the top of the retaining wall 10, forcing the filtrate to enter the overflow chamber 512 in advance and be discharged through the overflow pipe 9.
[0031] There are two sludge storage tanks 1, and the end of the conveying pipe 7 that enters the sludge storage tank 1 is provided with two branch pipes that are connected to the two sludge storage tanks 1.
[0032] The implementation principle of this application embodiment is as follows: The sludge to be treated is first temporarily stored in the sludge storage tank 1, and then transported to the conditioning tank 2 through the pipeline for chemical conditioning. After that, it is sent by the transfer pump 41 to the centrifuges of the new and old drying workshops 3 for dewatering. The filtrate containing residual PAM produced by dewatering flows into the water well 51 through the inlet pipe 6. The L-shaped baffle 10 in the water well 51 divides it into the outlet chamber 511 and the overflow chamber 512. The filtrate first gathers in the outlet chamber 511 and enters the water tank 52 for temporary storage through the transfer pipe 7. Then, it flows back to the two sludge storage tanks 1 through the transfer pipe 7 with the flow regulating valve 8 to mix with the sludge to be treated for reuse of PAM. When the liquid level in the outlet chamber 511 exceeds the top of the baffle 10 or the system is abnormal, the excess filtrate is discharged into the sewage treatment system through the overflow pipe 9. The whole system constructs a closed-loop reuse path of drying workshop 3, water well 51, water tank 52 and sludge storage tank 1, which greatly reduces the amount of new PAM added, reduces the cost of sludge treatment, and ensures the stable operation of the system.
[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A PAM-containing sludge filtrate reuse system, comprising a sludge storage tank (1) for temporarily storing sludge to be treated, a conditioning tank (2) for chemically conditioning the sludge in the sludge storage tank (1), and a drying workshop (3) for dewatering the sludge; characterized in that, It also includes a filtrate recovery assembly, which includes a water well (51) and a water tank (52) for storing residual PAM filtrate. The water well (51) is provided with an inlet pipe (6) for the residual PAM sludge filtrate to enter. One end of the inlet pipe (6) is connected to the inside of the water well (51), and the other end of the inlet pipe (6) is connected to the filtrate outlet of the centrifuge in the drying workshop (3). A conveying pipe (7) is provided on the water well (51). One end of the conveying pipe (7) is connected to the inside of the water well (51), and the other end of the conveying pipe (7) is connected to the inside of the sludge storage tank (1). The water tank (52) is installed on the conveying pipe (7) and is connected to the conveying pipe (7).
2. The PAM-containing sludge filtrate reuse system according to claim 1, characterized in that, It also includes a conveying component (4) for conveying the conditioned sludge to the drying workshop (3), the conveying component (4) being a conveying pump (41), and the conditioned tank (2) and the drying workshop (3) being conveyed by the conveying pump (41).
3. The PAM-containing sludge filtrate reuse system according to claim 1, characterized in that, The well (51) is also equipped with an overflow pipe (9), the inlet of the overflow pipe (9) is connected to the inside of the well (51), and the outlet of the overflow pipe (9) is connected to the inlet of the sewage treatment system.
4. A PAM-containing sludge filtrate reuse system according to claim 3, characterized in that, A baffle wall (10) is provided inside the well (51). The baffle wall (10) divides the inner cavity of the well (51) into an outlet cavity (511) and an overflow cavity (512). The inlet of the overflow pipe (9) is located in the overflow cavity (512). The end of the overflow pipe (9) located in the overflow cavity (512) is lower than the top of the baffle wall (10). The top of the baffle wall (10) is lower than the height of the well (51).
5. A PAM-containing sludge filtrate reuse system according to claim 4, characterized in that, The top height of the retaining wall (10) is lower than the maximum liquid level height of the water tank (52).
6. A PAM-containing sludge filtrate reuse system according to claim 1, characterized in that, There are two mud storage tanks (1), and two branch pipes connected to the mud storage tanks (1) are provided at the end of the conveying pipe (7) away from the water well (51).
7. A PAM-containing sludge filtrate reuse system according to claim 1, characterized in that, A flow regulating valve (8) is installed on the delivery pipe (7), and the flow regulating valve (8) is located near the outlet of the water tank (52).