Sewage treatment system

Abstract

The invention discloses a sewage treatment system, and belongs to the technical field of sewage treatment. The sewage treatment system comprises a filter tank, a secondary sedimentation tank, a heat exchange pipeline, a heat exchange assembly, a sludge drying assembly and a pumping assembly, the heat exchange pipeline is embedded in the inner wall of the filter tank and communicates with the heat exchange assembly, the filter tank is used for filtering sewage, the temperature of the sewage is higher than 0 DEG C, and the heat exchange pipeline is used for transferring heat of the sewage in the filter tank to the heat exchange assembly; the sludge drying assembly is communicated with the bottom of the secondary sedimentation tank through a pumping assembly, the bottom of the secondary sedimentation tank is used for depositing sludge, and the pumping assembly is used for pumping the sludge to the sludge drying assembly; the heat exchange assembly is coupled with the sludge drying assembly, and the heat exchange assembly is used for transferring heat to the sludge drying assembly, so that the sludge drying assembly heats the sludge to dry the sludge.

Description

Technical Field

[0001] This application belongs to the field of wastewater treatment technology, and specifically relates to a wastewater treatment system. Background Technology

[0002] With technological advancements and increasing emphasis on environmental protection, wastewater from industrial production must be treated before discharge or reuse. Typically, wastewater is treated through wastewater treatment systems. During this process, sludge accumulates at the bottom of the secondary sedimentation tank, requiring sludge treatment. However, current wastewater treatment systems lack sludge drying capabilities. If sludge drying is necessary, additional heat sources and processing equipment are required, increasing costs. Summary of the Invention

[0003] This application aims to provide a wastewater treatment system that at least solves the problem of increased costs caused by the need for additional heat sources and treatment devices.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a wastewater treatment system, which includes: a filter tank, a secondary sedimentation tank, a heat exchange pipeline, a heat exchange assembly, a sludge drying assembly, and a pumping assembly. The heat exchange pipe is embedded in the inner wall of the filter tank and is connected to the heat exchange component. The filter tank is used to filter sewage, and the temperature of the sewage is greater than 0 degrees. The heat exchange pipe is used to transfer the heat of the sewage in the filter tank to the heat exchange component. The sludge drying assembly is connected to the bottom of the secondary sedimentation tank via a pumping assembly. The bottom of the secondary sedimentation tank is used to deposit sludge, and the pumping assembly is used to pump the sludge to the sludge drying assembly. The heat exchange component is coupled to the sludge drying component, and the heat exchange component is used to transfer heat to the sludge drying component so that the sludge drying component heats the sludge to dry the sludge.

[0005] Optionally, the heat exchange assembly includes an evaporator, a compressor, a condenser, and a heat exchange liquid tank; The evaporator has a first heat exchange channel and a second heat exchange channel, and the condenser has a third heat exchange channel and a fourth heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the heat exchange pipe, and a first liquid flows in the first heat exchange channel and the heat exchange pipe. The first end of the second heat exchange channel is connected to the compressor, the compressor is connected to the first end of the third heat exchange channel, the second end of the third heat exchange channel is connected to the second end of the second heat exchange channel, a second liquid flows in the second heat exchange channel and the third heat exchange channel, the two ends of the fourth heat exchange channel are respectively connected to the heat exchange liquid tank, heat exchange liquid flows in the fourth heat exchange channel, and the heat exchange liquid tank is coupled to the sludge drying assembly; In this process, the first liquid in the first heat exchange channel releases heat to the second liquid in the second channel, and the second liquid in the third heat exchange channel heats the heat exchange liquid in the fourth channel.

[0006] Optionally, the sludge drying assembly includes a first drying shell and a plurality of drying plates; Multiple drying plates are located in the first drying shell and are spaced apart. Each drying plate has a liquid flow channel, and both ends of the liquid flow channel are connected to the heat exchange liquid tank so that the heat exchange liquid in the heat exchange liquid tank flows into the liquid flow channel, thereby heating the sludge entering the first drying shell with the drying plate. The first drying shell has a first sludge inlet and a first sludge outlet. The first sludge inlet is connected to the bottom of the secondary sedimentation tank through the pumping assembly, so that the sludge at the bottom of the secondary sedimentation tank can enter the first drying shell. The first sludge outlet is movably connected to a blocking member, which has an open state and a closed state. When the blocking member is in the closed state, the blocking member blocks the first sludge outlet; when the blocking member is in the open state, the blocking member releases the blockage of the first sludge outlet.

[0007] Optionally, the wastewater treatment system further includes a first air pump and a first heat exchanger; The first heat exchanger is disposed in the filter tank, the first drying shell also has a first gas outlet, the first air pump has a first air inlet and a first air outlet, the first air inlet is connected to the first gas outlet, and the first air outlet is connected to the first heat exchanger. The first air pump is used to extract the gas in the first drying shell and transfer it to the first heat exchanger. The first heat exchanger is used to exchange heat between the gas entering the first heat exchanger and the sewage in the filter tank, so that the gas condenses into liquid.

[0008] Optionally, the heat exchange assembly further includes a second drying shell, a second heat exchanger, a transmission assembly, and a second air pump; The second drying shell has a second sludge inlet, a second sludge outlet, a first gas inlet, and a second gas outlet. The transmission assembly and the second heat exchanger are both disposed in the second drying shell, and the second heat exchanger is located below the transmission assembly. The second heat exchanger has a heat exchange channel, and the two ends of the heat exchange channel are respectively connected to the heat exchange liquid tank. The first gas inlet is located below the second heat exchanger, and the first gas outlet faces the second heat exchanger. The second air pump is located outside the second drying shell, and the second air pump is connected to the first gas inlet. The second sludge inlet is connected to the bottom of the secondary sedimentation tank via the pumping assembly, allowing the sludge at the bottom of the secondary sedimentation tank to enter the second drying shell. The sludge moves to the transfer assembly, which then transfers it to the second sludge outlet. The heat exchange liquid in the heat exchange liquid tank flows into the heat exchange channel. The first air pump pumps gas into the first drying shell, which then flows through the second heat exchanger to heat the sludge transported by the transfer assembly. The gas then flows out through the second gas outlet to the outside of the second drying shell.

[0009] Optionally, the wastewater treatment system further includes a third heat exchanger; The third heat exchanger is disposed in the filter tank, and the second gas outlet is connected to the third heat exchanger so that the gas flowing out from the second gas outlet flows into the third heat exchanger. The third heat exchanger is used to exchange heat between the gas entering the third heat exchanger and the sewage in the filter tank, so that the gas condenses into liquid.

[0010] Optionally, the wastewater treatment system further includes an aerobic tank and aeration components; The aeration element is disposed in the aerobic tank. The aeration element has an air inlet and an air outlet. The air inlet is connected to the third heat exchanger so that the gas flowing out from the third heat exchanger flows into the air inlet. The air outlet is used to transport the gas entering the aeration element to the aerobic tank.

[0011] Optionally, the wastewater treatment system further includes a filter press; The first end of the filter press is connected to the bottom of the secondary sedimentation tank through the pumping assembly, and the second end of the filter press is connected to the second sludge inlet. The filter press is used to dewater the sludge flowing through the filter press.

[0012] Optionally, the sludge treatment system further includes a cutter; The second end of the filter press is connected to the second sludge inlet through the cutter. The cutter is used to cut the sludge flowing out of the filter press so that the cut sludge enters the second drying shell.

[0013] Optionally, the wastewater treatment system further includes a thickening tank; The thickening tank has an inlet end and an outlet end. The inlet end is connected to the bottom of the secondary sedimentation tank through the pumping assembly, and the outlet end is connected to the sludge drying assembly. The thickening tank is used to thicken the sludge entering the thickening tank so that the thickened sludge is transferred to the sludge drying assembly.

[0014] In this embodiment, since the heat exchange pipe is embedded in the inner wall of the filter tank and is connected to the heat exchange component, once sewage flows into the filter tank, the sewage, which typically has a certain temperature, can exchange heat with the heat exchange pipe, thus transferring the heat from the sewage to the heat exchange component. Furthermore, the sludge drying component is connected to the bottom of the secondary sedimentation tank via a pumping component. Therefore, the pumping component can pump the sludge from the bottom of the secondary sedimentation tank to the sludge drying component. The heat exchange component is coupled to the sludge drying component, allowing it to transfer heat to the sludge drying component, which then heats and dries the sludge. In other words, in this embodiment of the application, by setting up heat exchange pipes, heat exchange components, and sludge drying components, and with the heat exchange pipes embedded in the inner wall of the filter tank, during the wastewater treatment process, once the wastewater enters the filter tank, the heat of the wastewater can be transferred to the heat exchange components through the heat exchange pipes, and the heat exchange components transfer the heat to the sludge drying components, so that the sludge drying components heat the sludge pumped by the pumping components to dry the sludge. This is equivalent to directly utilizing the heat of the wastewater in the filter tank, thus avoiding the waste of heat in the wastewater treatment process and avoiding the need to set up an additional heat source for sludge drying, thereby reducing costs. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of one of the wastewater treatment systems provided in an embodiment of this application; Figure 2 This is a second schematic diagram of a wastewater treatment system provided in an embodiment of this application; Figure 3 This is a third schematic diagram of a wastewater treatment system provided in an embodiment of this application.

[0016] Figure label: 001: Blocking component; 002: First liquid pump; 003: First valve; 004: First collection pipe; 005: Second liquid pump; 006: Second valve; 007: Second collection pipe; 008: Air heat exchanger; 0081: First air duct; 0082: Second air duct; 009: Air supply pump; 010: First sludge pump; 011: Third valve; 012: Second sludge pump; 013: Fourth valve; 10: Filter tank; 20: Second sedimentation tank; 30: Heat exchange pipe; 40: Heat exchange assembly; 41: Evaporator; 42: Compressor; 43: Condenser; 44: Heat exchange liquid tank; 45: First heat exchange pump; 46: Second heat exchange pump; 47: Throttling valve; 411: First heat exchange channel; 412: Second heat exchange channel; 431: Third heat exchange channel; 432: 50: Fourth heat exchange channel; 51: Sludge drying assembly; 51: First drying shell; 511: First sludge inlet; 512: First sludge outlet; 513: First gas outlet; 52: Drying plate; 521: Liquid flow channel; 53: Second drying shell; 531: Second sludge inlet; 532: Second sludge outlet; 533: First gas inlet; 534: Second gas outlet; 54: Second heat exchanger; 55: Transmission assembly; 551: Conveyor belt; 56: Second air pump; 60: Pumping assembly; 70: First air pump; 80: First heat exchanger; 90: Third heat exchanger; 100: Aerobic tank; 110: Aeration component; 120: Filter press; 130: Cutting machine; 140: Thickening tank; 150: Anaerobic tank; 160: Anoxic tank; 170: Drying tank. Detailed Implementation

[0017] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] This application provides a wastewater treatment system, such as... Figure 1 As shown, the wastewater treatment system includes: a filter tank 10, a secondary sedimentation tank 20, a heat exchange pipe 30, a heat exchange assembly 40, a sludge drying assembly 50, and a pumping assembly 60.

[0022] Heat exchange pipe 30 is embedded in the inner wall of filter tank 10 and is connected to heat exchange component 40. Filter tank 10 is used to filter sewage, and the temperature of sewage is greater than 0 degrees. Heat exchange pipe 30 is used to transfer heat from sewage in filter tank 10 to heat exchange component 40. Sludge drying component 50 is connected to the bottom of secondary sedimentation tank 20 through pumping component 60. The bottom of secondary sedimentation tank 20 is used to deposit sludge, and pumping component 60 is used to pump sludge to sludge drying component 50. Heat exchange component 40 is coupled to sludge drying component 50 and is used to transfer heat to sludge drying component 50 so that sludge drying component 50 heats sludge to dry sludge.

[0023] In this embodiment, since the heat exchange pipe 30 is embedded in the inner wall of the filter tank 10 and is connected to the heat exchange component 40, once sewage flows into the filter tank 10, the sewage usually has a certain temperature, so the sewage in the filter tank 10 can exchange heat with the heat exchange pipe 30, and the heat exchange pipe 30 can transfer the heat of the sewage to the heat exchange component 40. In addition, the sludge drying component 50 is connected to the bottom of the secondary sedimentation tank 20 through the pumping component 60. Therefore, the pumping component 60 can pump the sludge at the bottom of the secondary sedimentation tank 20 to the sludge drying component 50, and the heat exchange component 40 is coupled to the sludge drying component 50, so that the heat exchange component 40 can transfer heat to the sludge drying component 50, and the sludge drying component 50 can heat the sludge transferred to the sludge drying component 50 to dry the sludge. That is, in this embodiment of the application, by setting up a heat exchange pipe 30, a heat exchange component 40, and a sludge drying component 50, and with the heat exchange pipe 30 embedded in the inner wall of the filter tank 10, during the sewage treatment process, once the sewage enters the filter tank 10, the heat of the sewage can be transferred to the heat exchange component 40 through the heat exchange pipe 30, and the heat exchange component 40 transfers the heat to the sludge drying component 50, so that the sludge drying component 50 heats the sludge pumped by the pumping component 60 to dry the sludge. This is equivalent to directly utilizing the heat of the sewage in the filter tank 10, so that the heat of the sewage is not wasted during the sewage treatment process, and there is no need to set up an additional heat source for sludge drying, which can reduce costs.

[0024] It should be noted that the heat exchange pipe 30 can be a coil, but it can also be of other types. Furthermore, the heat exchange pipe 30 can be flush with the inner wall of the filter tank 10, and it can have a pre-reserved interface for high-pressure water backwashing or chemical cleaning, facilitating subsequent cleaning. Additionally, in this embodiment, the pumping assembly 60 can be a sludge pump.

[0025] In addition, in this embodiment, the pumping component 60 can be connected to the bottom of the secondary sedimentation tank 20 through a pumping pipe, and the pumping component 60 can also be connected to the sludge drying component 50 through a pumping pipe. Thus, once the pumping component 60 is running, the sludge at the bottom of the secondary sedimentation tank 20 can be pumped to the sludge drying component 50 through the pumping pipe.

[0026] Additionally, in some embodiments, such as Figure 1As shown, the heat exchange assembly 40 may include an evaporator 41, a compressor 42, a condenser 43, and a heat exchange liquid tank 44. The evaporator 41 has a first heat exchange channel 411 and a second heat exchange channel 412, and the condenser 43 has a third heat exchange channel 431 and a fourth heat exchange channel 432. The two ends of the first heat exchange channel 411 are respectively connected to the heat exchange pipe 30, and a first liquid flows in the first heat exchange channel 411 and the heat exchange pipe 30. The first end of the second heat exchange channel 412 is connected to the compressor 42, and the compressor 42 is connected to the first end of the third heat exchange channel 431. The second end of the third heat exchange channel 431 is connected to the second end of the second heat exchange channel 412. The second liquid flows in the second heat exchange channel 412 and the third heat exchange channel 431. The two ends of the fourth heat exchange channel 432 are respectively connected to the heat exchange liquid tank 44. The heat exchange liquid flows in the fourth heat exchange channel 432. The heat exchange liquid tank 44 is coupled to the sludge drying assembly 50. The first liquid in the first heat exchange channel 411 releases heat to the second liquid in the second channel, and the second liquid in the third heat exchange channel 431 heats the heat exchange liquid in the fourth channel.

[0027] With this setup, during the wastewater treatment process, once the filter tank 10 contains wastewater, the heat from the wastewater can exchange heat with the heat exchange pipes 30 on the inner wall of the filter tank 10, thus heating the first liquid flowing in the heat exchange pipes 30. This first liquid flows to the first heat exchange channel 411 and then back to the heat exchange pipes 30, achieving a circulating flow. During this flow, the first liquid in the first heat exchange channel 411 exchanges heat with the second liquid in the second heat exchange channel 412; that is, the first liquid in the first heat exchange channel 411 releases heat to the second liquid in the second heat exchange channel 412. After absorbing heat, the liquid enters the compressor 42 for compression. The temperature of the compressed second liquid further increases, and this heated liquid flows through the third heat exchange channel 431. The second liquid in the third heat exchange channel 431 exchanges heat with the heat exchange liquid in the fourth heat exchange channel 432, thus heating the heat exchange liquid in the fourth heat exchange channel 432. The heated heat exchange liquid flows into the heat exchange liquid tank 44, which is coupled to the sludge drying assembly 50. This allows heat to be transferred from the heat exchange liquid to the sludge drying assembly 50, thereby heating and drying the sludge entering the assembly. In short, by setting up the evaporator 41, compressor 42, condenser 43, and heat exchange liquid tank 44, the heat from the wastewater in the filter tank 10 is easily transferred to the sludge drying assembly 50, ensuring that the sludge drying assembly 50 heats the sludge entering the assembly.

[0028] It should be noted that, as Figure 1As shown, the heat exchange assembly 40 may further include a first heat exchange pump 45. One end of the first heat exchange pump 45 is connected to the heat exchange pipe 30, and the other end of the first heat exchange pump 45 is connected to one end of the first heat exchange channel 411. Thus, when the first heat exchange pump 45 is running, the first heat exchange pump 45 can make the first liquid circulate in the first heat exchange channel 411 and the heat exchange pipe 30. The presence of the first heat exchange pump 45 provides power for the first liquid, which facilitates the circulation of the first liquid in the first heat exchange channel 411 and the heat exchange pipe 30. Additionally, the heat exchange assembly 40 may also include a second heat exchange pump 46. One end of the second heat exchange pump 46 is connected to one end of the fourth heat exchange channel 432, and the other end of the second heat exchange pump 46 is connected to the heat exchange liquid tank 44. Thus, when the second heat exchange pump 46 is running, it enables the heat exchange liquid to circulate within the fourth heat exchange channel 432 and the heat exchange liquid tank 44. The presence of the second heat exchange pump 46 provides power to the heat exchange liquid, facilitating its circulation within the fourth heat exchange channel 432 and the heat exchange liquid tank. The first liquid and the second liquid may be different. The first liquid may be ethylene glycol, but it can also be other types, such as water. This embodiment of the application does not limit the specific type of liquid used. The second liquid may be a refrigerant. Alternatively, the first liquid and the second liquid may be the same.

[0029] Additionally, in the embodiments of this application, such as Figure 1 As shown, the heat exchange assembly 40 may further include a throttling valve 47. One end of the throttling valve 47 may be connected to the second end of the third heat exchange channel 431, and the other end of the throttling valve 47 may be connected to the second end of the second heat exchange channel 412. Alternatively, the throttling valve 47 may be installed between the compressor 42 and the second heat exchange channel 412, with one end connected to the compressor 42 and the other end connected to the first end of the second heat exchange channel 412. The throttling valve 47 may also be installed between the compressor 42 and the third heat exchange channel 431, with one end connected to the compressor 42 and the other end connected to the first end of the third heat exchange channel 431. The specific installation location of the throttling valve 47 is not limited in this embodiment.

[0030] Additionally, in some embodiments, such as Figure 1As shown, the sludge drying assembly 50 includes a first drying shell 51 and multiple drying plates 52. The multiple drying plates 52 are all located within the first drying shell 51 and are spaced apart. Each drying plate 52 has a liquid flow channel 521, both ends of which are connected to a heat exchange liquid tank 44, allowing heat exchange liquid from the heat exchange liquid tank 44 to flow into the liquid flow channel 521, thereby heating the sludge entering the first drying shell 51. The first drying shell 51 has a first sludge inlet 511. The first sludge outlet 512 and the first sludge inlet 511 are connected to the bottom of the secondary sedimentation tank 20 through a pumping assembly 60, so that the sludge at the bottom of the secondary sedimentation tank 20 can enter the first drying shell 51. The first sludge outlet 512 is movably connected to a blocking member 001, which has an open state and a closed state. When the blocking member 001 is in the closed state, the blocking member 001 blocks the first sludge outlet 512. When the blocking member 001 is in the open state, the blocking member 001 releases the blocking of the first sludge outlet 512.

[0031] Since both ends of the liquid flow channel 521 are connected to the heat exchange liquid tank 44, the heat exchange liquid in the heat exchange liquid tank 44 can flow into the liquid flow channel 521 of the drying plate 52. Since multiple drying plates 52 are located in the first drying shell 51 and are spaced apart, the first drying shell 51 has a first sludge inlet 511 and a first sludge outlet 512. The first sludge inlet 511 is connected to the bottom of the secondary sedimentation tank 20 via a pumping assembly 60. Therefore, once the pumping assembly 60 is running, it can pump the sludge from the bottom of the secondary sedimentation tank 20 into the first drying shell 51. The sludge then flows into the gaps between the multiple drying plates 52. After the heat exchange liquid in the heat exchange liquid tank 44 flows into the drying plates 52, the drying plates 52 are heated, thus heating the sludge between them and drying it. Because the first sludge outlet 512 is movably connected to the blocking member 001, the blocking member 001 can be in the open state, allowing the sludge heated by the drying plate 52 to flow out from the first sludge outlet 512. This allows the sludge pumped into the first drying shell 51 by the pumping assembly 60 to flow out smoothly after being heated. In other words, by providing multiple drying plates 52 and blocking members 001, the blocking member 001 can be in the closed state, allowing the sludge pumped into the first drying shell 51 by the pumping assembly 60 to be heated by the drying plate 52. Afterward, the blocking member 001 can be opened, allowing the heated sludge to be discharged. This facilitates the continuous heating and discharge of sludge entering the first drying shell 51.

[0032] It should be noted that in this embodiment, the drying plate 52 can be a metal hollow filter plate. Of course, the drying plate 52 can also be of other types, as long as it has a liquid flow channel 521 to allow the heat exchange liquid to flow through its interior. Furthermore, the drying plate 52 can be made of metal to facilitate heat conduction. For example, the drying plate 52 can be made of copper, or aluminum. The specific material of the drying plate 52 is not limited in this embodiment.

[0033] In addition, in this embodiment, the blocking member 001 can be connected to a drive motor, and the drive motor drives the blocking member 001 to move, so that the blocking member 001 switches between a closed state and an open state.

[0034] Furthermore, in this embodiment, the number of drying plates 52 can be set according to actual needs. For example, the number of drying plates 52 may be 20, or even 30. This embodiment does not limit the specific number of drying plates 52.

[0035] Additionally, in the embodiments of this application, such as Figure 1 As shown, the wastewater treatment system may further include a first liquid pump 002, which has a first inlet end and a first outlet end. The first inlet end is connected to the heat exchange liquid tank 44, and one end of each liquid flow channel 521 of the multiple drying plates 52 is connected to the first outlet end. Thus, the first liquid pump 002 can pump the heat exchange liquid in the heat exchange liquid tank 44 into the liquid flow channels 521 of the multiple drying plates 52, facilitating the entry of the heat exchange liquid in the heat exchange liquid tank 44 into the liquid flow channels 521 of the multiple drying plates 52. The first outlet end of the first liquid pump 002 can be connected to a first liquid pipe, and the liquid flow channels 521 of the multiple drying plates 52 are all connected to the first liquid pipe, so that the liquid flow channels 521 of the multiple drying plates 52 are all connected to the first outlet end of the first liquid pump 002. In addition, the heat exchange liquid tank 44 can be connected to a second liquid pipe, and the liquid flow channels 521 of the multiple drying plates 52 are all connected to the second liquid pipe, so that the liquid flow channels 521 of the multiple drying plates 52 are all connected to the heat exchange liquid tank 44. Thus, after the heat exchange liquid in the heat exchange liquid tank 44 is pumped by the first liquid pump 002 to the liquid flow channels 521 of the multiple drying plates 52, the heat exchange liquid exchanges heat with the sludge. After heat exchange, the heat exchange liquid flows into the heat exchange liquid tank 44 through the second liquid pipe, realizing the circulation of the heat exchange liquid.

[0036] Additionally, in the embodiments of this application, such as Figure 1As shown, the wastewater treatment system may further include a first valve 003, through which the first inlet end of the first liquid pump 002 is connected to the heat exchange liquid tank 44. The first valve 003 can be a solenoid valve, or it can be a mechanical valve. The specific type of the first valve 003 is not limited in this embodiment. By setting the first valve 003 and controlling its opening degree, the flow rate of the heat exchange liquid flowing into the liquid channel 521 of the drying plate 52 is controlled.

[0037] Additionally, in some embodiments, such as Figure 1 As shown, the wastewater treatment system also includes a first air pump 70 and a first heat exchanger 80; the first heat exchanger 80 is disposed in the filter tank 10, the first drying shell 51 also has a first gas outlet 513, the first air pump 70 has a first air inlet end and a first air outlet end, the first air inlet end is connected to the first gas outlet 513, and the first air outlet end is connected to the first heat exchanger 80; the first air pump 70 is used to extract the gas in the first drying shell 51 and transfer it to the first heat exchanger 80, the first heat exchanger 80 is used to exchange heat between the gas entering the first heat exchanger 80 and the wastewater in the filter tank 10, so that the gas condenses into liquid.

[0038] Since the first heat exchanger 80 is located in the filter tank 10, and the first drying shell 51 also has a first gas outlet 513, and the first air pump 70 has a first air inlet and a first air outlet, with the first air inlet connected to the first gas outlet 513 and the first air outlet connected to the first heat exchanger 80, the moisture in the sludge in the first drying shell 51 evaporates during the heating process by the drying plate 52, resulting in a relatively large amount of humid and hot air in the first drying shell 51. This humid and hot air can then be pumped by the first air pump 70 to the first heat exchanger 80 in the filter tank 10, where it can be condensed by the wastewater in the filter tank 10, facilitating the subsequent discharge of the condensed liquid. In other words, by setting up the first air pump 70, it is possible to effectively prevent the accumulation of excessive humid and hot gas in the first drying shell 51, which would affect the drying of the sludge by the drying plate 52, and ensure that the humid and hot gas is transferred to the first heat exchanger 80 in the filter tank 10, allowing the humid and hot gas to condense and liquefy, facilitating its discharge.

[0039] It should be noted that, in the embodiments of this application, as Figure 1 As shown, the wastewater treatment system may also include a first collection pipe 004, one end of which is connected to a first heat exchanger 80, so that the condensate formed after the humid and hot air in the first heat exchanger 80 is condensed can flow into the first collection pipe 004 and be transported to the required location through the first collection pipe 004.

[0040] Additionally, in some embodiments, such as Figure 1As shown, the heat exchange assembly 40 may further include a second drying shell 53, a second heat exchanger 54, a transfer assembly 55, and a second air pump 56. The second drying shell 53 has a second sludge inlet 531, a second sludge outlet 532, a first gas inlet 533, and a second gas outlet 534. The transfer assembly 55 and the second heat exchanger 54 are both disposed in the second drying shell 53, and the second heat exchanger 54 is located below the transfer assembly 55. The second heat exchanger 54 has a heat exchange channel, and both ends of the heat exchange channel are respectively connected to the heat exchange liquid tank 44. The first gas inlet 533 is located below the second heat exchanger 54 and faces the second heat exchanger 54. The second air pump 56 is located below the second heat exchanger 54. The second drying shell 53 is located outside the second drying shell 53, and the second air pump 56 is connected to the first gas inlet 533; the second sludge inlet 531 is connected to the bottom of the second sedimentation tank 20 through the pumping assembly 60, so that the sludge at the bottom of the second sedimentation tank 20 can enter the second drying shell 53, and the sludge moves to the transfer assembly 55, so that the sludge is transferred to the second sludge outlet 532 through the transfer assembly 55. The heat exchange liquid in the heat exchange liquid tank 44 can flow into the heat exchange channel. The first air pump 70 pumps gas to the first drying shell 51, so that the gas flows through the second heat exchanger 54 to heat it, so that the heated gas heats the sludge transported by the transfer assembly 55, and the gas flows out to the outside of the second drying shell 53 through the second gas outlet 534.

[0041] Since the second drying shell 53 has a second sludge inlet 531, a second sludge outlet 532, a first gas inlet 533, and a second gas outlet 534, and the second sludge inlet 531 is connected to the bottom of the secondary sedimentation tank 20 through a pumping assembly 60, the pumping assembly 60 can pump the sludge at the bottom of the secondary sedimentation tank 20 into the second drying shell 53. In addition, the transfer assembly 55 and the second heat exchanger 54 are both disposed in the second drying shell 53. The second heat exchanger 54 has a heat exchange channel, and both ends of the heat exchange channel are connected to the heat exchange liquid tank 44. Therefore, the heat exchange liquid in the heat exchange liquid tank 44 can flow into the heat exchange channel, causing the second heat exchanger 54 to generate heat. This heat can heat the gas inside the second drying shell 53, and the sludge pumped into the second drying shell 53 by the pumping assembly 60 will be transferred by the transfer assembly 55 to the second sludge outlet 532. In addition, the second heat exchanger 54 is located below the transmission assembly 55, the first gas inlet 533 is located below the second heat exchanger 54 and faces the second heat exchanger 54, and the second air pump 56 is located outside the second drying shell 53 and is connected to the first gas inlet 533. Therefore, once the second air pump 56 is running, the second air pump 56 can pump the gas outside the second drying shell 53 into the second drying shell 53, and the gas will flow through the second heat exchanger 54, so that the gas is heated. The heated gas can then flow through the transmission assembly 55, so that the heated gas can heat the sludge on the transmission assembly 55 to dry the sludge, and then the gas flows out of the second drying shell 53 through the second gas outlet 534. By setting up a transmission component 55, a second heat exchanger 54, and a second air pump 56, the sludge entering the second drying shell 53 can be heated by the gas heated by the second heat exchanger 54 during the transmission process of the transmission component 55. Once the gas heats the sludge, making the gas relatively humid, the heated humid gas can be discharged through the second gas outlet 534, ensuring that the sludge in the second drying shell 53 can be continuously heated and dried.

[0042] It should be noted that the second sludge inlet 531 can face the transfer assembly 55, thereby ensuring that the sludge pumped into the second drying shell 53 is transferred to the transfer assembly 55. The transfer assembly 55 may include multiple conveyor belts 551, which can be stacked and spaced apart. The topmost conveyor belt 551 faces the second sludge inlet 531, and the bottommost conveyor belt 551 faces the second sludge outlet 532. This allows sludge flowing in from the second sludge inlet 531 to be transferred to this conveyor belt 551, which then transfers the sludge to the next level of conveyor belt 551, ultimately reaching the second sludge outlet 532. Adjacent conveyor belts 551 can be slightly offset, allowing the upper conveyor belt 551 to transfer sludge to the lower conveyor belt 551. The conveyor belts 551 can be made of materials such as rubber or cloth. Of course, the transmission component 55 can also be of other types. For example, the transmission component 55 may include a single conveyor belt 551, or it may include a robotic arm with a support plate at its end for carrying sludge. The specific type of the transmission component 55 is not limited in this embodiment.

[0043] Additionally, in the embodiments of this application, such as Figure 1 As shown, the wastewater treatment system may further include a second liquid pump 005, which has a second inlet and a second outlet. The second inlet is connected to the heat exchange liquid tank 44, and one end of the heat exchange channel of the second heat exchanger 54 is connected to the second outlet. The other end of the heat exchange channel of the second heat exchanger 54 is connected to the heat exchange liquid tank 44. Thus, the second liquid pump 005 can pump the heat exchange liquid in the heat exchange liquid tank 44 into the heat exchange channel of the second heat exchanger 54, facilitating the entry of the heat exchange liquid in the heat exchange liquid tank 44 into the heat exchange channel of the second heat exchanger 54. After exchanging heat with the sludge, the heat exchange liquid in the second heat exchanger 54 can flow back into the heat exchange liquid tank 44, forming a circulating flow. The second outlet of the second liquid pump 005 can be connected to a third liquid pipe, and one end of the heat exchange channel of the second heat exchanger 54 is connected to the third liquid pipe. In addition, the heat exchange liquid tank 44 can be connected to the fourth liquid pipeline, and the heat exchange flow channel of the second heat exchanger 54 is connected to the fourth liquid pipeline, so that the heat exchange liquid in the heat exchange liquid tank 44 can be pumped by the second liquid pump 005 to the liquid flow channel 521 of the multiple drying plates 52, where the heat exchange liquid exchanges heat with the sludge, and the heat exchange liquid after heat exchange flows into the heat exchange liquid tank 44 through the fourth liquid pipeline to realize the circulation of the heat exchange liquid.

[0044] Additionally, in the embodiments of this application, such as Figure 1As shown, the wastewater treatment system may further include a second valve 006, through which the second inlet of the second liquid pump 005 is connected to the heat exchange liquid tank 44. The second valve 006 can be a solenoid valve, or it can be a mechanical valve. The specific type of the second valve 006 is not limited in this embodiment. By setting the second valve 006 and controlling its opening degree, the flow rate of the heat exchange liquid flowing into the heat exchange channel of the second heat exchanger 54 is controlled.

[0045] Additionally, in some embodiments, such as Figure 1 As shown, the wastewater treatment system may also include a third heat exchanger 90; the third heat exchanger 90 is disposed in the filter tank 10, and the second gas outlet 534 is connected to the third heat exchanger 90 so that the gas flowing out of the second gas outlet 534 flows into the third heat exchanger 90. The third heat exchanger 90 is used to exchange heat between the gas entering the third heat exchanger 90 and the wastewater in the filter tank 10, so that the gas condenses into liquid.

[0046] Since the third heat exchanger 90 is located in the filter tank 10, and the second gas outlet 534 is connected to the third heat exchanger 90, the moisture in the sludge in the second drying shell 53 evaporates during the heating process by the gas flowing through the second heat exchanger 54, resulting in a relatively large amount of humid and hot air in the second drying shell 53. This humid and hot air can then be pumped by the second air pump 56 to the third heat exchanger 90 in the filter tank 10, where it can be condensed by the wastewater in the filter tank 10, facilitating the subsequent discharge of the condensed liquid. In other words, by setting up the second air pump 56 and the third heat exchanger 90, it is possible to effectively prevent the accumulation of excessive humid and hot gas in the second drying shell 53, which would affect the drying of the sludge, and to ensure that the humid and hot gas is transferred to the third heat exchanger 90 in the filter tank 10, allowing the humid and hot gas to condense and liquefy, facilitating its discharge.

[0047] It should be noted that, in the embodiments of this application, the sewage treatment system may also include a second collection pipe 007, one end of which is connected to a third heat exchanger 90, so that the condensate formed after the humid and hot air in the third heat exchanger 90 is condensed can flow into the second collection pipe 007 and be transported to the required location through the second collection pipe 007.

[0048] Additionally, in some embodiments, such as Figure 1As shown, the wastewater treatment system may also include an air heat exchanger 008, which has a first air duct 0081 and a second air duct 0082. The two ends of the first air duct 0081 are respectively connected to the second air pump 56 and the first gas inlet 533 of the second drying shell 53. The two ends of the second air duct 0082 are respectively connected to the second gas outlet 534 of the second drying shell 53 and the third heat exchanger 90. That is, the second air pump 56 and the first gas inlet 533 are connected through the first air duct 0081, and the second gas outlet 534 and the third heat exchanger 90 are connected through the second air duct 0082. With this setup, once the second air pump 56 is running, the gas pumped by the second air pump 56 flows through the first air passage 0081, but the hot and humid gas flowing out from the second gas outlet 534 flows through the second air passage 0082. The gas in the first air passage 0081 and the hot and humid gas in the second air passage 0082 can exchange heat, thereby heating the gas in the first air passage 0081. This allows the gas flowing into the second drying shell 53 to be preheated, making it easier for the gas to be heated and dried by the second heat exchanger 54.

[0049] Additionally, in some embodiments, such as Figure 1 As shown, the wastewater treatment system may also include an aerobic tank 100 and an aeration element 110. The aeration element 110 is installed in the aerobic tank 100 and has an air inlet and an air outlet. The air inlet is connected to a third heat exchanger 90 so that the gas flowing out of the third heat exchanger 90 flows into the air inlet, and the air outlet is used to transport the gas entering the aeration element 110 to the aerobic tank 100.

[0050] Since the aeration element 110 is installed in the aerobic tank 100, and has an air inlet and an air outlet, with the air inlet connected to the third heat exchanger 90, the gas that has not been condensed after passing through the third heat exchanger 90 can flow to the inlet and then into the aeration element 110. Afterward, the gas can flow from the air outlet into the aerobic tank 100, thus replenishing the aerobic tank 100 with gas. This gas also carries a certain amount of heat, causing the temperature of the aerobic tank 100 to rise, thereby maximizing heat utilization. In other words, by connecting the air inlet to the third heat exchanger 90, the gas flowing out of the second drying shell 53 can pass through the third heat exchanger 90 and then enter the aerobic tank 100, allowing the heat carried by the gas to be fully utilized. Furthermore, this gas can replenish the aerobic tank 100 with a certain amount of oxygen, facilitating the treatment of wastewater in the aerobic tank 100. Furthermore, the gas flowing out of the second drying shell 53 has a rather unpleasant odor, and when this gas flows into the aerobic tank 100, it can also play a role in deodorization.

[0051] It should be noted that, in the embodiments of this application, as Figure 1As shown, the wastewater treatment may further include an air pump 009, which is connected to the air inlet of the aeration unit 110. The air pump 009 can pump gas into the aerobic tank 100, further supplying gas to the aerobic tank 100 to ensure that the wastewater in the aerobic tank 100 is effectively treated. The air pump 009 can be connected to the air inlet of the aeration unit 110 via an air supply pipe.

[0052] Additionally, in some embodiments, such as Figure 1 As shown, the wastewater treatment system may also include a filter press 120; the first end of the filter press 120 is connected to the bottom of the secondary sedimentation tank 20 through a pumping assembly 60, and the second end of the filter press 120 is connected to the second sludge inlet 531. The filter press 120 is used to dewater the sludge flowing through the filter press 120.

[0053] Since the first end of the filter press 120 is connected to the bottom of the secondary sedimentation tank 20 via the pumping assembly 60, and the second end of the filter press 120 is connected to the second sludge inlet 531, the pumping assembly 60 can pump the sludge to the filter press 120. The filter press 120 can then dewater the sludge, physically dewatering it and reducing its moisture content, which is beneficial for subsequent drying. In other words, by setting up the filter press 120, the sludge flowing into the second drying shell 53 can be preliminarily dewatered, making it easier for the sludge in the second drying shell 53 to be heated and dried, thus improving the drying efficiency of the sludge in the second drying shell 53.

[0054] In addition, in this embodiment of the application, when the sewage treatment system includes a filter press 120, the first sludge inlet 511 of the first drying shell 51 can also be connected to the filter press 120, so that the sludge flowing into the first drying shell 51 can also be dewatered.

[0055] Additionally, in some embodiments, such as Figure 1 As shown, the sludge treatment system may also include a cutter 130; the second end of the filter press 120 is connected to the second sludge inlet 531 through the cutter 130, and the cutter 130 is used to cut the sludge flowing out of the filter press 120 so that the cut sludge enters the second drying shell 53.

[0056] Since the second end of the filter press 120 is connected to the second sludge inlet 531 via the cutter 130, the sludge flowing out of the filter press 120 can flow to the cutter 130 and be cut. This results in smaller sludge volumes, which, once inside the second drying shell 53, facilitate heating and drying. In other words, by providing the cutter 130, the sludge entering the second drying shell 53 is heated and dried more efficiently, thus improving the drying efficiency of the sludge in the second drying shell 53.

[0057] It should be noted that the cutting machine 130 can be connected to the second sludge inlet 531 of the second drying shell 53 through a transmission structure, so that the cut sludge can be transported to the second sludge inlet 531 through the transmission structure. The transmission structure may include, but is not limited to, a conveyor belt, a conveyor roller, etc.

[0058] In addition, in this embodiment, the cutter 130 can cut sludge into strips. Of course, the cutter 130 can also cut sludge into other shapes, such as cutting sludge into flakes. This embodiment does not limit the scope of the application.

[0059] Additionally, in some embodiments, such as Figure 1 As shown, the wastewater treatment system also includes a thickening tank 140; the thickening tank 140 has an inlet end and an outlet end, the inlet end is connected to the bottom of the secondary sedimentation tank 20 through a pumping assembly 60, and the outlet end is connected to a sludge drying assembly 50. The thickening tank 140 is used to thicken the sludge entering the thickening tank 140 so that the thickened sludge is transferred to the sludge drying assembly 50.

[0060] Since the inlet of the thickening tank 140 is connected to the bottom of the secondary settling tank 20 via the pumping assembly 60, and the outlet is connected to the sludge drying assembly 50, the pumping assembly 60 can pump the sludge from the bottom of the secondary settling tank 20 to the thickening tank 140. The thickening tank 140 thickens the sludge, and then the thickened sludge is transferred to the sludge drying assembly 50. The thickened sludge is easier to dry. In other words, by setting up the thickening tank 140, the subsequent drying of the sludge can be facilitated.

[0061] It should be noted that when the sludge drying assembly 50 includes a first drying shell 51, the outlet end of the thickening tank 140 can be connected to the first sludge inlet 511 of the first drying shell 51, thereby allowing the sludge flowing out of the thickening tank 140 to be transferred to the first sludge inlet 511 and then enter the first drying shell 51. Additionally, as... Figure 1 As shown, the wastewater treatment system may further include a first sludge pump 010. The first end of the first sludge pump 010 is connected to the outlet end of the thickening tank 140, and the second end of the first sludge pump 010 is connected to the first sludge inlet 511 of the first drying shell 51. Thus, the first sludge pump 010 can provide power to facilitate the transfer of sludge from the thickening tank 140 to the first drying shell 51 for heating and drying. Additionally, the wastewater treatment system may also include a third valve 011. The first end of the first sludge pump 010 is connected to the outlet end of the thickening tank 140 via the third valve 011, thereby controlling the flow rate of sludge entering the first drying shell 51 by controlling the opening degree of the third valve 011.

[0062] In addition, in this embodiment, when the sludge drying assembly 50 includes a second drying shell 53, the outlet end of the thickening tank 140 can be connected to the second sludge inlet 531 of the second drying shell 53, thereby allowing the sludge flowing out of the thickening tank 140 to be transferred to the second sludge inlet 531 and then into the second drying shell 53. Furthermore, the wastewater treatment system may also include a second sludge pump 012, with its first end connected to the outlet end of the thickening tank 140 and its second end connected to the second sludge inlet 531 of the second drying shell 53. This allows the second sludge pump 012 to provide power, facilitating the transfer of sludge from the thickening tank 140 to the second drying shell 53 for heating and drying. Additionally, the wastewater treatment system may also include a fourth valve 013, with the first end of the second sludge pump 012 connected to the outlet end of the thickening tank 140 via the fourth valve 013. This allows the flow rate of sludge entering the second drying shell 53 to be controlled by adjusting the opening degree of the fourth valve 013. When the wastewater treatment system includes a filter press 120, the outlet end of the thickening tank 140 can be connected to one end of the filter press 120, thereby transferring the sludge flowing out of the thickening tank 140 to the filter press 120. Additionally, the first end of the second sludge pump 012 is connected to the outlet end of the thickening tank 140, and the second end of the second sludge pump 012 can be connected to one end of the filter press 120, thus connecting the outlet end of the thickening tank 140 to one end of the filter press 120.

[0063] Additionally, in the embodiments of this application, such as Figure 2 and Figure 3 As shown, the wastewater treatment system may also include an anaerobic tank 150, an anoxic tank 160, and a drying tank 170. The first collection pipe 004 may be connected to the anaerobic tank 150, and the second collection pipe 007 may be connected to the anaerobic tank 150, so that the liquid in the first collection pipe 004 flows into the anaerobic tank 150, and the liquid in the second collection pipe 007 flows into the anaerobic tank 150.

[0064] It should be noted that in the embodiments of this application, the anaerobic tank 150, anoxic tank 160, aerobic tank 100, filtration tank 10, and secondary sedimentation tank 20 can all be hexagonal. Of course, the shapes of the anaerobic tank 150, anoxic tank 160, aerobic tank 100, filtration tank 10, and secondary sedimentation tank 20 can also be other shapes, for example, the shapes of the anaerobic tank 150, anoxic tank 160, aerobic tank 100, filtration tank 10, and secondary sedimentation tank 20 can be quadrilaterals. This embodiment of the application does not limit the shape of these shapes.

[0065] In addition, in this embodiment, the drying tank 170 can be configured as a closed structure, and the pumping component 60, sludge drying component 50, heat exchange component 40, etc. can be installed inside the drying tank 170.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A wastewater treatment system, characterized in that, The wastewater treatment system includes: a filter tank, a secondary sedimentation tank, heat exchange pipes, heat exchange components, a sludge drying component, and a pumping component; The heat exchange pipe is embedded in the inner wall of the filter tank and is connected to the heat exchange component. The filter tank is used to filter sewage, and the temperature of the sewage is greater than 0 degrees. The heat exchange pipe is used to transfer the heat of the sewage in the filter tank to the heat exchange component. The sludge drying assembly is connected to the bottom of the secondary sedimentation tank via a pumping assembly. The bottom of the secondary sedimentation tank is used to deposit sludge, and the pumping assembly is used to pump the sludge to the sludge drying assembly. The heat exchange component is coupled to the sludge drying component, and the heat exchange component is used to transfer heat to the sludge drying component so that the sludge drying component heats the sludge to dry the sludge.

2. The wastewater treatment system according to claim 1, characterized in that, The heat exchange assembly includes an evaporator, a compressor, a condenser, and a heat exchange liquid tank; The evaporator has a first heat exchange channel and a second heat exchange channel, and the condenser has a third heat exchange channel and a fourth heat exchange channel. The two ends of the first heat exchange channel are respectively connected to the heat exchange pipe, and a first liquid flows in the first heat exchange channel and the heat exchange pipe. The first end of the second heat exchange channel is connected to the compressor, the compressor is connected to the first end of the third heat exchange channel, the second end of the third heat exchange channel is connected to the second end of the second heat exchange channel, a second liquid flows in the second heat exchange channel and the third heat exchange channel, the two ends of the fourth heat exchange channel are respectively connected to the heat exchange liquid tank, heat exchange liquid flows in the fourth heat exchange channel, and the heat exchange liquid tank is coupled to the sludge drying assembly; In this process, the first liquid in the first heat exchange channel releases heat to the second liquid in the second channel, and the second liquid in the third heat exchange channel heats the heat exchange liquid in the fourth channel.

3. The wastewater treatment system according to claim 2, characterized in that, The sludge drying assembly includes a first drying shell and multiple drying plates; Multiple drying plates are located in the first drying shell and are spaced apart. Each drying plate has a liquid flow channel, and both ends of the liquid flow channel are connected to the heat exchange liquid tank so that the heat exchange liquid in the heat exchange liquid tank flows into the liquid flow channel, thereby heating the sludge entering the first drying shell with the drying plate. The first drying shell has a first sludge inlet and a first sludge outlet. The first sludge inlet is connected to the bottom of the secondary sedimentation tank through the pumping assembly, so that the sludge at the bottom of the secondary sedimentation tank can enter the first drying shell. The first sludge outlet is movably connected to a blocking member, which has an open state and a closed state. When the blocking member is in the closed state, the blocking member blocks the first sludge outlet; when the blocking member is in the open state, the blocking member releases the blockage of the first sludge outlet.

4. The wastewater treatment system according to claim 3, characterized in that, The wastewater treatment system also includes a first air pump and a first heat exchanger; The first heat exchanger is disposed in the filter tank, the first drying shell also has a first gas outlet, the first air pump has a first air inlet and a first air outlet, the first air inlet is connected to the first gas outlet, and the first air outlet is connected to the first heat exchanger. The first air pump is used to extract the gas in the first drying shell and transfer it to the first heat exchanger. The first heat exchanger is used to exchange heat between the gas entering the first heat exchanger and the sewage in the filter tank, so that the gas condenses into liquid.

5. The wastewater treatment system according to claim 3, characterized in that, The heat exchange assembly also includes a second drying shell, a second heat exchanger, a transmission assembly, and a second air pump; The second drying shell has a second sludge inlet, a second sludge outlet, a first gas inlet, and a second gas outlet. The transmission assembly and the second heat exchanger are both disposed in the second drying shell, and the second heat exchanger is located below the transmission assembly. The second heat exchanger has a heat exchange channel, and the two ends of the heat exchange channel are respectively connected to the heat exchange liquid tank. The first gas inlet is located below the second heat exchanger, and the first gas outlet faces the second heat exchanger. The second air pump is located outside the second drying shell, and the second air pump is connected to the first gas inlet. The second sludge inlet is connected to the bottom of the secondary sedimentation tank via the pumping assembly, allowing the sludge at the bottom of the secondary sedimentation tank to enter the second drying shell. The sludge moves to the transfer assembly, which then transfers it to the second sludge outlet. The heat exchange liquid in the heat exchange liquid tank flows into the heat exchange channel. The first air pump pumps gas into the first drying shell, which then flows through the second heat exchanger to heat the sludge transported by the transfer assembly. The gas then flows out through the second gas outlet to the outside of the second drying shell.

6. The wastewater treatment system according to claim 5, characterized in that, The wastewater treatment system also includes a third heat exchanger; The third heat exchanger is disposed in the filter tank, and the second gas outlet is connected to the third heat exchanger so that the gas flowing out from the second gas outlet flows into the third heat exchanger. The third heat exchanger is used to exchange heat between the gas entering the third heat exchanger and the sewage in the filter tank, so that the gas condenses into liquid.

7. The wastewater treatment system according to claim 6, characterized in that, The wastewater treatment system also includes an aerobic tank and aeration components; The aeration element is disposed in the aerobic tank. The aeration element has an air inlet and an air outlet. The air inlet is connected to the third heat exchanger so that the gas flowing out from the third heat exchanger flows into the air inlet. The air outlet is used to transport the gas entering the aeration element to the aerobic tank.

8. The wastewater treatment system according to claim 6, characterized in that, The wastewater treatment system also includes a filter press; The first end of the filter press is connected to the bottom of the secondary sedimentation tank through the pumping assembly, and the second end of the filter press is connected to the second sludge inlet. The filter press is used to dewater the sludge flowing through the filter press.

9. The wastewater treatment system according to claim 8, characterized in that, The sludge treatment system also includes a cutting machine; The second end of the filter press is connected to the second sludge inlet through the cutter. The cutter is used to cut the sludge flowing out of the filter press so that the cut sludge enters the second drying shell.

10. The wastewater treatment system according to any one of claims 1-9, characterized in that, The wastewater treatment system also includes a thickening tank; The thickening tank has an inlet end and an outlet end. The inlet end is connected to the bottom of the secondary sedimentation tank through the pumping assembly, and the outlet end is connected to the sludge drying assembly. The thickening tank is used to thicken the sludge entering the thickening tank so that the thickened sludge is transferred to the sludge drying assembly.

Images