Sludge dewatering and filtrate recycling device

Abstract

The utility model relates to the technical field of sewage treatment. The sludge dewatering and filtrate recycling device comprises a sludge pretreatment device, a dewatering device, a filtrate circulating system and a sludge transfer device, the sludge pretreatment device is used for pretreating sludge so as to improve the dehydration performance of the sludge; the dehydration device is connected with the sludge pretreatment device and is used for carrying out dehydration treatment on the pretreated sludge to form filtrate and a mud cake; the filtrate recovery device is connected with the dehydration device and is used for recovering filtrate generated in the dehydration process; and the sludge transfer device is connected with the dehydration device and is used for transporting the sludge cakes. The sludge dewatering device has the effects of high dewatering efficiency, reduction of energy consumption, reduction of sludge moisture content and realization of recycling of filtrate.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially is related to a sludge dewatering and filtrate recycling device. BACKGROUND

[0002] Sludge is solid waste produced in the sewage treatment process, which contains a large amount of water and organic matter. If not properly treated, it will cause serious pollution to the environment. The traditional sludge dewatering method has the problems of high energy consumption, low dewatering efficiency, and high water content of dewatered sludge.

[0003] Therefore, it is urgent to develop a high-efficiency, energy-saving and environmentally friendly sludge dewatering device. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a sludge dewatering and filtrate recycling device, which aims to solve the problems of high energy consumption, low dewatering rate, and high water content of dewatered sludge in the traditional sludge dewatering method.

[0005] The utility model provides a sludge dewatering and filtrate recycling device, which comprises a sludge pretreatment device, a dewatering device, a filtrate circulation system, and a sludge transfer device.

[0006] The sludge pretreatment device is used for pretreating sludge to improve its dewatering performance.

[0007] Illustratively, the sludge pretreatment device comprises a sludge conditioning tank and a sludge modification device, wherein the sludge conditioning tank is connected to the sludge modification device, and the sludge conditioning tank is used for homogenizing and conditioning sludge; the sludge modification device is used for receiving homogenized and conditioned sludge, adding sludge treatment agents to the sludge, changing the physical and chemical properties of the sludge, and improving its dewatering performance.

[0008] Specifically, the sludge conditioning tank

[0009] The dewatering device is connected to the sludge pretreatment device and is used for dewatering pretreated sludge to form filtrate and mud cake.

[0010] The filtrate recovery device is connected to the dewatering device and is used for recovering filtrate produced in the dewatering process.

[0011] The sludge transfer device is connected to the dewatering device and is used for transporting the mud cake.

[0012] In some embodiments, the sludge pretreatment device comprises a sludge conditioning tank and a sludge modification device, wherein the sludge conditioning tank is connected to the sludge modification device, the sludge conditioning tank is used for homogenizing and conditioning the sludge, and the sludge modification device is used for receiving the homogenized and conditioned sludge, adding a sludge treatment agent to the sludge, changing the physical and chemical properties of the sludge, and improving the dewatering performance of the sludge.

[0013] In some embodiments, the sludge modification device comprises:

[0014] The conditioning tank is connected to the dewatering device, and is used for sending the sludge added with the sludge treatment agent to the dewatering device.

[0015] The conditioner agitator is arranged in the conditioning tank, and is used for agitating the sludge and the sludge treatment agent in the conditioning tank.

[0016] The agent tank is used for storing the sludge treatment agent.

[0017] The agent agitator is arranged in the agent tank, and is used for agitating the sludge treatment agent.

[0018] The composite agent feeding pump is connected to the agent tank, the agent-chlorine adding chamber, and the conditioning tank, respectively, and is used for pumping the sludge treatment agent in the agent-chlorine adding chamber into the agent tank, and pumping the sludge treatment agent stored in the agent tank into the conditioning tank.

[0019] In some embodiments, the dewatering device comprises:

[0020] The filter press is connected to the conditioning tank, the filtrate recovery device, and the sludge transfer device, respectively, and is used for dewatering the sludge added with the sludge treatment agent, forming a sludge cake and a filtrate, sending the filtrate to the filtrate recovery device, and sending the sludge cake to the sludge transfer device.

[0021] The diaphragm extrusion pump is connected to the filter press, and is used for increasing the pressure of extrusion water in the filter press.

[0022] In some embodiments, the filtrate recovery device comprises a sludge discharge tank, a concentration tank, and a backwash recovery tank, wherein:

[0023] The sludge discharge tank is connected to the dewatering device and the concentration tank, is used for receiving the filtrate formed by extruding the sludge in the dewatering device, and is used for precipitating the filtrate, and sending the precipitated filtrate to the concentration tank.

[0024] The concentration tank is connected with the sludge conditioning tank, and is used for concentrating the filtrate in the concentration tank to form sludge and clean liquid through solid-liquid separation; the sludge sinks to the bottom of the concentration tank and is discharged into the sludge conditioning tank; and the clean liquid is discharged from an overflow port.

[0025] The back-flushing recovery tank is connected with the overflow port of the concentration tank, and is used for receiving the clean liquid.

[0026] In some embodiments, the sludge transportation device comprises a sludge-water separation conveyor, a transportation conveyor and a sludge transportation room.

[0027] The sludge-water separation conveyor is connected with the dewatering device, and is used for conveying the sludge cake formed by the dewatering device into the transportation conveyor.

[0028] The transportation conveyor is connected with the sludge transportation room, and is used for transporting the sludge cake to the sludge transportation room.

[0029] The sludge transportation room is used for temporarily storing the sludge cake.

[0030] In some embodiments, the transportation conveyor comprises:

[0031] A horizontal conveyor is connected with the sludge-water separation conveyor, and is used for transporting the sludge cake in a horizontal direction.

[0032] An inclined conveyor is connected with the horizontal conveyor and the sludge transportation room respectively, and is used for conveying the sludge cake to the sludge transportation room in an inclined direction.

[0033] In some embodiments, the device further comprises:

[0034] A clean water tank is connected with the filter press, and is used for storing the extrusion water required by the filter press.

[0035] In some embodiments, the device further comprises:

[0036] A cloth washing pump is connected with the clean water tank and the filter press through pipelines, and is used for supplying water to the filter cloth in the filter press for cleaning through the clean water tank.

[0037] An extrusion pump is connected with the filter press through a pipeline, and is used for increasing the pressure of the extrusion water in the filter press to sufficiently dewater the sludge cake.

[0038] In some modes of implementation, a control system is further included, which is connected with the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device respectively, and is used for controlling the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device; the control system includes a plurality of sensors, which are arranged in the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device, and are used for monitoring the running states of the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device.

[0039] The utility model has the advantages that the sludge dewatering and filtrate recycling device provided by the application comprises a sludge pretreatment device, a dewatering device, a filtrate recycling system, a sludge transportation device and a control system, the sludge pretreatment device is used for pretreating sludge to improve the dewatering performance of the sludge, the dewatering device is connected with the sludge pretreatment device and is used for dewatering the pretreated sludge to form filtrate and a mud cake, the filtrate recovery device is connected with the dewatering device and is used for recovering the filtrate generated in the dewatering process, the sludge transportation device is connected with the dewatering device and is used for transporting the mud cake, and the control system is connected with the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device respectively and is used for controlling the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0041] Figure 1 It is the principle diagram of the sludge dewatering and filtrate recycling device of the utility model;

[0042] Figure 2 It is the partial schematic view of the sludge dewatering and filtrate recycling device of the utility model;

[0043] Figure 3 It is the 1-1 sectional view of the sludge dewatering and filtrate recycling device of the utility model;

[0044] Figure 4The utility model discloses a 2-2 sectional view of a sludge dewatering and filtrate recycling device.

[0045] Figure 5 The utility model discloses a 3-3 sectional view of a sludge dewatering and filtrate recycling device.

[0046] Mark explanation:

[0047] 1, sludge conditioning tank, 2, conditioning tank, 3, conditioning tank agitator, 4, reagent tank, 5, reagent agitator, 6, composite reagent dosing pump, 7, filter press, 8, diaphragm extrusion pump, 9, sludge discharge tank, 10, concentration tank, 11, backwash recovery tank, 12, slurry separation conveyor, 13, horizontal conveyor, 14, inclined conveyor, 15, sludge transfer room, 16, dosing and chlorination room, 17, clean water tank, 18, cloth washing pump, 19, feed pump, 20, air compressor, 21, process air tank, 22, cold dryer, 23, instrument air tank. Specific implementation

[0048] The technical scheme of the utility model will be described below in conjunction with embodiments, obviously, the described embodiments are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0049] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientation or positional relationship shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0050] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Referring to Figures 1 to 5 The present application relates to a sludge dewatering and filtrate recycling device, comprising a sludge pretreatment device, a dewatering device, a filtrate recycling system and a sludge transfer device.

[0052] The sludge pretreatment device is used to pretreat the sludge to improve its dewatering performance.

[0053] Specifically, the sludge pretreatment device comprises a sludge conditioning tank 1 and a sludge modification device, the sludge conditioning tank 1 is connected with the sludge modification device, wherein the sludge conditioning tank 1 is used to homogenize and adjust the sludge; the sludge modification device is used to receive the homogenized and adjusted sludge, and add sludge treatment agents to the sludge to change the physical and chemical properties of the sludge and improve its dewatering performance.

[0054] It should be noted that the sludge conditioning tank 1 is connected with the sludge thickening tank 10, and the sludge in the sludge thickening tank 10 enters the sludge conditioning tank 1, and the sludge is homogenized and adjusted in the sludge conditioning tank 1.

[0055] Homogenization: the sludge conditioning tank 1 can mix the sludge produced at different time periods, so that the concentration and properties of the sludge are more uniform, and the fluctuation in the treatment process is reduced.

[0056] Adjustment: the sludge conditioning tank 1 can temporarily store the sludge, and adjust the discharge amount of the sludge in time according to the operation of the subsequent treatment facilities, so as to ensure the stable operation of the treatment facilities.

[0057] The sludge modification device for treating sludge can include a conditioning tank 2, a conditioning tank agitator 3, a medicament tank 4, a medicament agitator 5, and a composite medicament dosing pump 6. The conditioning tank 2 is connected to the dewatering device for feeding sludge with added sludge treatment medicament into the dewatering device; the conditioning tank agitator 3 is arranged in the conditioning tank 2 for agitating the sludge and the sludge treatment medicament in the conditioning tank 2; the medicament tank 4 is used for storing the sludge treatment medicament; the medicament agitator 5 is arranged in the medicament tank 4 for agitating the sludge treatment medicament; and the composite medicament dosing pump 6 is connected to the medicament tank 4, the medicament dosing and chlorination room 16, and the conditioning tank 2, respectively, for pumping the sludge treatment medicament in the medicament dosing and chlorination room 16 into the medicament tank 4, and pumping the sludge treatment medicament stored in the medicament tank 4 into the conditioning tank 2.

[0058] The conditioning tank 2 is part of the sludge pretreatment device, which is connected to the sludge conditioning tank 1 and the dewatering device, and mainly functions to feed sludge with added sludge treatment medicament into the dewatering device. In the conditioning tank 2, the sludge and the treatment medicament are mixed to change the physicochemical properties of the sludge and improve its dewatering performance. Understandably, the connection between the sludge conditioning tank 1 and the conditioning tank 2 is through a pipeline, and the position of the pipeline can be set as needed, which is not limited in the present application. It should be noted that the conditioning tank 2 can be connected to the filter press 7 through the feed pump 19 to pump the sludge with added sludge treatment medicament in the conditioning tank 2 into the dewatering device.

[0059] The conditioning tank agitator 3 is arranged in the conditioning tank 2, and its main function is to agitate the sludge and the sludge treatment medicament in the conditioning tank 2 to ensure that the medicament and the sludge are fully mixed to improve the dewatering efficiency of the sludge. The agitator realizes uniform mixing through mechanical stirring or air stirring, etc.

[0060] The medicament tank 4 is used for storing the sludge treatment medicament. In the process of sludge treatment, specific medicaments need to be added to the sludge to improve its dewatering performance, and the medicament tank 4 is a container for storing these medicaments.

[0061] The medicament agitator 5 is arranged in the medicament tank 4, and its function is to agitate the sludge treatment medicament in the medicament tank 4 to prevent the medicament from precipitating or stratifying, and to ensure that the medicament can be uniformly distributed when used, thereby improving the effect of sludge treatment.

[0062] The composite medicament dosing pump 6 is a device connected to the medicament tank 4, the medicament dosing and chlorination room 16, and the conditioning tank 2, and its main function is to pump the sludge treatment medicament in the medicament dosing and chlorination room 16 into the medicament tank 4, and to pump the sludge treatment medicament stored in the medicament tank 4 into the conditioning tank 2. The dosing pump can accurately control the dosage of the medicament to ensure the reasonable use of the medicament in the process of sludge treatment.

[0063] The dewatering device is connected with the sludge pretreatment device, and is used for dewatering the pretreated sludge to form filtrate and sludge cake.

[0064] Specifically, the dewatering device includes a filter press 7 and a diaphragm extrusion pump 8. The filter press 7 is connected with the conditioning tank 2, the filtrate recovery device and the sludge transfer device respectively, and is used for dewatering the sludge added with the sludge treatment agent to form sludge cake and filtrate, and sending the filtrate to the filtrate recovery device and the sludge cake to the sludge transfer device. The diaphragm extrusion pump 8 is connected with the filter press 7, and is used for increasing the pressure of extrusion water in the filter press 7.

[0065] It should be noted that the filter press 7 is used for dewatering the sludge treated by the conditioning tank 2 and added with the sludge treatment agent. The filter press 7 separates the water (filtrate) and solid (sludge cake) in the sludge by applying pressure. The filter press 7 is connected with the conditioning tank 2 to receive the sludge mixed with the agent in the conditioning tank 2. The filter press 7 is connected with the filtrate recovery device to transport the filtrate generated in the dewatering process to the filtrate recovery device for subsequent treatment or recovery. The filter press 7 is connected with the sludge transfer device to transport the sludge cake formed after dewatering to the sludge transfer device for subsequent transportation or treatment.

[0066] The diaphragm extrusion pump 8 is connected with the filter press 7, and mainly functions to increase the pressure of extrusion water in the filter press 7. The diaphragm extrusion pump 8 helps the filter press 7 to more effectively extrude the water in the sludge by increasing the pressure, thereby improving the dewatering efficiency and reducing the water content of the sludge cake. The diaphragm extrusion pump 8 provides additional pressure, so that the filter press 7 can more tightly compress the sludge in the dewatering process, further reducing the water content in the sludge cake.

[0067] The filtrate recovery device is connected with the dewatering device, and is used for recovering the filtrate generated in the dewatering process.

[0068] Specifically, the filtrate recovery device includes a sludge discharge tank 9, a concentration tank 10 and a backwash recovery tank 11. The sludge discharge tank 9 is connected with the dewatering device and the concentration tank 10, and is used for receiving the filtrate formed by extruding the sludge by the dewatering device, and precipitating the filtrate. The precipitated filtrate is sent to the concentration tank 10. The concentration tank 10 is connected with the sludge conditioning tank 1, and is used for concentrating the filtrate therein, and separating the solid and liquid to form sludge and clean liquid. The sludge is discharged into the sludge conditioning tank 1 after sinking to the bottom of the tank, and the clean liquid is discharged from the overflow port. The backwash recovery tank 11 is connected with the overflow port of the concentration tank 10, and is used for receiving the clean liquid.

[0069] It should be noted that the main function of the sludge pool 9 is to receive the filtrate generated during the extrusion of the sludge by the dewatering device. The design of the sludge pool 9 allows the solid particles in the filtrate to settle down, thereby achieving solid-liquid separation. The sludge pool 9 is connected to the dewatering device to receive the dewatered filtrate. The sludge pool 9 is also connected to the thickening pool 10 to send the filtrate after sedimentation treatment to the thickening pool 10 for further treatment.

[0070] The function of the thickening pool 10 is to concentrate the filtrate sent from the sludge pool 9, and to achieve solid-liquid separation through physical and chemical principles, thereby forming sludge and clean liquid. The thickening pool 10 is connected to the sludge conditioning pool 1 to return the sludge settled at the bottom of the pool to the sludge conditioning pool 1 for re-entry into the sludge treatment process. The clean liquid is discharged by overflow, specifically, the clean liquid (i.e. the relatively clear liquid after concentration treatment) is discharged through the overflow port, and this part of the liquid can be further treated or recycled. The design of the thickening pool 10 includes feeding, sedimentation, stirring, sludge discharge and discharging, etc. to ensure effective separation of sludge and clean liquid.

[0071] The backwash recovery pool 11 is connected to the overflow port of the thickening pool 10, and its main function is to receive the clean liquid discharged from the thickening pool 10. The backwash recovery pool 11 can store or further treat these clean liquids for recycling, such as for washing filter cloth or other production purposes, achieving the recycling of water resources.

[0072] The sludge transfer device is connected to the dewatering device for transporting the mud cake;

[0073] Specifically, the sludge transfer device includes a mud-water separation conveyor 12, a transfer conveyor and a sludge transfer room 15; wherein the mud-water separation conveyor 12 is connected to the dewatering device for sending the mud cake formed by the dewatering device to the transfer conveyor; the transfer conveyor is connected to the sludge transfer room 15 for transferring the mud cake to the sludge transfer room 15; the sludge transfer room 15 is used for temporarily storing the mud cake.

[0074] It should be noted that the mud-water separation conveyor 12 is directly connected to the dewatering device, and its main function is to transport the mud cake formed in the dewatering device from the dewatering area (the working area of the filter press 7). This conveyor is designed to handle mud cakes containing a small amount of water, ensuring the integrity and transportation efficiency of the mud cake during transportation.

[0075] The transfer conveyor connects the mud-water separation conveyor 12 and the sludge transfer room 15, and is responsible for transferring the mud cake from the dewatering area to the sludge transfer room 15. The transfer conveyor can be a series of conveying equipment, such as a belt conveyor, a screw conveyor or other conveying equipment suitable for the characteristics of the mud cake, which can effectively transport the mud cake in different environments and distances.

[0076] The sludge transfer bay 15 is the final destination of the sludge transfer device, used for temporary storage of the sludge cake delivered from the transfer conveyor. The transfer bay can be a closed space or a specific storage area designed for the temporary storage of sludge cake until they are further processed or finally disposed. The sludge transfer bay 15 needs to have suitable environmental conditions to prevent the sludge cake from deteriorating during storage or causing environmental pollution.

[0077] Further, the transfer conveyor includes a horizontal conveyor 13 and an inclined conveyor 14. The horizontal conveyor 13 is connected to the dewatering conveyor 12 for transferring the sludge cake in a horizontal direction; the inclined conveyor 14 is connected to the horizontal conveyor 13 and the sludge transfer bay 15 respectively for delivering the sludge cake to the sludge transfer bay 15 in an inclined direction.

[0078] Specifically, the horizontal conveyor 13 is connected to the dewatering conveyor 12, and its main function is to transfer the sludge cake in a horizontal direction. This conveyor is usually used to smoothly transport the sludge cake from one processing area to another without the need to overcome gravity or make vertical movements. The inclined conveyor 14 is connected to the horizontal conveyor 13 and the sludge transfer bay 15, and its main function is to deliver the sludge cake to the sludge transfer bay 15 in an inclined direction. This conveyor is designed to transport the sludge cake between different heights, usually used to lift the sludge cake from the dewatering area to the higher sludge transfer bay 15. The combined use of these two conveyors makes it possible for the sludge cake to be smoothly transported from the dewatering device to the sludge transfer bay 15, whether it is horizontal movement or vertical lifting, effectively completing the task of transferring the sludge cake. This design not only improves the degree of automation of the sludge treatment system, but also reduces the need for manual operation, improving the efficiency and safety of the entire sludge treatment process.

[0079] In one embodiment, a clean water tank 17 is also included, which is connected to the filter press 7 for storing the squeezing water required for the operation of the filter press 7. The clean water tank 17 ensures a stable water supply for the filter press 7 during the dewatering process, to maintain the dewatering efficiency and effect.

[0080] In one embodiment, a cloth washing pump 18 is also included. The cloth washing pump 18 is connected to the clean water tank 17 and the filter press 7 through pipelines, for supplying washing water to the filter cloth in the filter press 7 through the clean water tank 17. The cloth washing pump 18 is used to provide washing water for the filter cloth in the filter press 7, to maintain the cleanliness and filtering efficiency of the filter cloth. The filter cloth will gradually be clogged by sludge during the filter pressing process, regular cleaning of the filter cloth can prevent the decline of filtering efficiency, maintain the cleanliness of the filter cloth, prolong the service life of the filter cloth, and improve the dewatering efficiency.

[0081] In one embodiment, a control system is further included, which is connected with the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device respectively, for controlling the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device.

[0082] The control system includes a plurality of sensors, which are arranged in the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device, for monitoring the running states of the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transportation device.

[0083] The control system can include a central control unit, an actuator and a user interface. The central control unit receives sensor data, processes according to preset programs and logic, and issues control instructions. The actuator executes specific operations according to the instructions of the central control unit, such as starting or stopping the motor, adjusting the valve opening, etc. The user interface allows the operator to monitor the system status, manually input instructions, or adjust the automatic control parameters.

[0084] It should be noted that the connection mentioned in the foregoing can be understood as connection through pipes for corresponding transportation.

[0085] In addition, the sludge dewatering and filtrate recycling device further includes an air compressor 20, a process air tank 21, a cold dryer 22 and an instrument air tank 23, wherein the air compressor 20 and the process air tank 21 are respectively used to provide air pressure for pneumatic valves in sludge treatment. The cold dryer 22 discharges moisture from the air pressure system of sludge treatment. The instrument air tank 23 provides air pressure for instruments in sludge treatment.

[0086] Embodiment

[0087] The sludge treatment process is as follows:

[0088] Sludge pretreatment:

[0089] The sludge is first sent to the sludge conditioning tank 1 for homogenization and conditioning, to ensure that the concentration and properties of the sludge are uniform, and to reduce fluctuations in the treatment process.

[0090] Then, the sludge enters the sludge modification device (conditioning tank 2), where an appropriate amount of modifier (such as polyacrylamide, etc.) is added, and is fully mixed by the conditioning tank agitator 3, to change the physicochemical properties of the sludge and improve its dewatering performance.

[0091] Sludge dewatering:

[0092] The pretreated and modified sludge is sent to the high-pressure diaphragm plate-and-frame filter press 7 through a pipe for pressure filtration dewatering, to form a sludge cake and a filtrate.

[0093] The filter press 7 cooperates with the diaphragm extrusion pump 8, and the pressure and dewatering effect of the filter press 7 are monitored in real time by the control system, and the operating parameters of the filter press 7 are adjusted as needed.

[0094] Filter recovery and circulation:

[0095] The filtrate generated during the dewatering process is treated by the filtrate circulation system. The filtrate first enters the sludge discharge tank 9 for sedimentation, and the sedimented filtrate is then sent to the thickening tank 10.

[0096] In the thickening tank 10, the filtrate is further concentrated and solid-liquid separated, and the formed sludge is returned to the sludge conditioning tank 1, while the clean liquid (supernatant) is discharged through the overflow and enters the backwash recovery tank 11 for production use, realizing the recycling of the filtrate.

[0097] Sludge transportation:

[0098] The mud cake formed by dewatering is sent to the sludge transportation conveyor by the sludge-water separation conveyor 12, and then sent to the sludge transportation room 15 for temporary storage by the transportation conveyor (including the horizontal conveyor 13 and the inclined conveyor 14).

[0099] Control system monitoring:

[0100] During the entire sludge treatment process, the control system monitors the operating state of the sludge pretreatment device, dewatering device, filtrate recovery device, and sludge transportation device in real time through sensors, and automatically controls according to the set parameters to ensure the efficiency and stability of the entire sludge treatment process.

[0101] Through the above process, the sludge dewatering and filtrate recycling device realizes efficient dewatering of sludge, recycling and utilization of filtrate, and reduction and stabilization of sludge, while reducing environmental impact and operating costs.

[0102] Specific implementation:

[0103] The sludge to be treated is first sent to the sludge conditioning tank 1 for homogenization and adjustment, and then sent to the sludge modification device (conditioning tank 2) by the sludge conveying pump. In the sludge modification device (conditioning tank 2), an appropriate amount of modifier (such as polyacrylamide) is added to the sludge (from the dosing system), and fully stirred and mixed. The modified sludge is sent to the high-pressure diaphragm plate-and-frame filter press 7 through the pipeline for pressure filtration dewatering. During the pressure filtration process, the pressure and dewatering effect of the filter press 7 are monitored in real time by the control system (completed by the filter press 7 and the diaphragm extrusion pump 8), and the operating parameters of the filter press 7 are adjusted as needed. The dewatered cake is sent to the sludge cake sludge transfer room 15 for storage through the conveying equipment (sludge-water separation conveyor 12, horizontal conveyor 13, inclined conveyor 14); the filtrate is collected and the sewage is recycled without external discharge through the filtrate recycling system (sludge discharge tank 9, concentration tank 10, sludge conditioning tank 1).

[0104] In summary, the present application provides a sludge dewatering and filtrate recycling device, which has the following beneficial effects:

[0105] The dewatering efficiency is improved. The sludge is homogenized and the physicochemical properties are improved by the pretreatment device (including the sludge conditioning tank and the sludge modification device), which improves the dewatering performance of the sludge and thus improves the dewatering efficiency.

[0106] The energy consumption is reduced. The pressure of the extrusion water in the filter press is increased by the diaphragm extrusion pump, so that the cake is fully dewatered. This physical method reduces the dependence on high-energy consumption equipment, thereby reducing the energy consumption of the entire dewatering process.

[0107] The water content of the sludge is reduced. The combination of the filter press and the diaphragm extrusion pump effectively reduces the water content of the dewatered sludge, making the cake drier and facilitating subsequent handling, transportation or disposal.

[0108] The filtrate is recycled. The design of the filtrate recycling device (including the sludge discharge tank, the concentration tank and the backflushing recovery tank) realizes the recycling and reuse of the filtrate generated during the dewatering process, reduces the waste of water resources, and reduces environmental pollution.

[0109] The sludge treatment quality is improved. During the entire sludge treatment process, the control system monitors and automatically controls the operating state of the sludge pretreatment device, the dewatering device, the filtrate recycling device and the sludge transfer device in real time through the sensor, ensuring the efficiency and stability of the sludge treatment process and improving the sludge treatment quality.

[0110] Through the recycling of the filtrate and the reduction of the sludge, the impact on the environment during the sludge treatment process is reduced, and the environmental protection goal is achieved.

[0111] Reducing operation cost, the automation control system reduces the demand of manual operation, improves the efficiency of the whole sludge treatment process, thereby reduces the operation cost.

[0112] System stability and reliability, the control system monitors the running state of each device in real time, discovers and handles problems in time, reduces the downtime of failure, and improves the stability and reliability of the system.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sludge dewatering and filtrate recycling device, characterized by comprising: The sludge pretreatment device, the dewatering device, the filtrate circulation system and the sludge transportation device are connected to each other. The sludge pretreatment device is used for pretreating sludge to improve its dewatering performance. The dewatering device is connected to the sludge pretreatment device and used for dewatering the pretreated sludge to form filtrate and sludge cake. The filtrate recovery device is connected to the dewatering device and used for recovering the filtrate generated in the dewatering process. The sludge transportation device is connected to the dewatering device and used for transporting the sludge cake. The sludge transportation device comprises a sludge-water separation conveyor, a transportation conveyor and a sludge transportation room. The sludge-water separation conveyor is connected to the dewatering device and used for feeding the sludge cake formed by the dewatering device into the transportation conveyor. The transportation conveyor is connected to the sludge transportation room and used for transporting the sludge cake to the sludge transportation room. The sludge transportation room is used for temporarily storing the sludge cake. The transportation conveyor comprises a horizontal conveyor and an inclined conveyor. The sludge pretreatment device comprises a sludge conditioning tank and a sludge modification device. The sludge conditioning tank is connected to the sludge modification device.

2. The sludge dewatering and filtrate recycling apparatus according to claim 1, characterized by The sludge conditioning tank is used for homogenizing and conditioning sludge.

3. The sludge dewatering and filtrate recycling apparatus according to claim 2, characterized by The sludge modification device is used for receiving the homogenized and conditioned sludge and adding sludge treatment agent to the sludge to change the physical and chemical properties of the sludge and improve its dewatering performance. The sludge modification device comprises a conditioning tank, a conditioning tank agitator, a medicament tank, a medicament agitator, a composite medicament dosing pump, a dosing and chlorination room and a conditioning tank. The conditioning tank is connected to the dewatering device and used for feeding the sludge added with the sludge treatment agent into the dewatering device. The conditioning tank agitator is arranged in the conditioning tank and used for agitating the sludge and the sludge treatment agent in the conditioning tank. The medicament tank is used for storing the sludge treatment agent. The medicament agitator is arranged in the medicament tank and used for agitating the sludge treatment agent.

4. The sludge dewatering and filtrate recycling apparatus according to claim 3, wherein The composite medicament dosing pump is connected to the medicament tank, the dosing and chlorination room and the conditioning tank and used for pumping the sludge treatment agent in the dosing and chlorination room into the medicament tank and pumping the sludge treatment agent stored in the medicament tank into the conditioning tank. The dewatering device comprises a filter press and a diaphragm extrusion pump. The filter press is connected to the conditioning tank, the filtrate recovery device and the sludge transportation device and used for dewatering the sludge added with the sludge treatment agent to form sludge cake and filtrate, feeding the filtrate into the filtrate recovery device and feeding the sludge cake into the sludge transportation device.

5. The sludge dewatering and filtrate recycling apparatus according to claim 2, wherein The diaphragm extrusion pump is connected to the filter press and used for increasing the pressure of extrusion water in the filter press. The filtrate recovery device comprises a sludge discharge tank, a concentration tank and a backwash recovery tank. The sludge discharge tank is connected to the dewatering device and the concentration tank and used for receiving the filtrate formed by extruding sludge in the dewatering device and precipitating the filtrate, feeding the precipitated filtrate into the concentration tank. The concentration tank is connected with the sludge conditioning tank, and is used for concentrating the filtrate in the concentration tank, and separating solid and liquid to form sludge and clean liquid. The sludge is discharged into the sludge conditioning tank after sinking to the bottom of the tank, and the clean liquid is discharged from the overflow port. The backwash recovery tank is connected with the overflow port of the concentration tank, and is used for receiving the clean liquid.

6. The sludge dewatering and filtrate recycling apparatus according to claim 4, wherein Further comprising: A clean water tank connected with the filter press, and used for storing the extrusion water required by the filter press.

7. The sludge dewatering and filtrate recycling apparatus according to claim 6, wherein Further comprising: A cloth washing pump connected with the clean water tank and the filter press through pipelines, and used for supplying water for washing the filter cloth in the filter press through the clean water tank.

8. The sludge dewatering and filtrate recycling apparatus according to claim 1, wherein Further comprising a control system connected with the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transfer device respectively, and used for controlling the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transfer device. The control system comprises a plurality of sensors arranged in the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transfer device, and used for monitoring the running states of the sludge pretreatment device, the dewatering device, the filtrate recovery device and the sludge transfer device.

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