Energy-saving small sewage treatment equipment and system
By replacing traditional equipment with a pipeline assembly driven by an air supply component, the problems of high energy consumption and high cost of small sewage treatment equipment are solved, achieving the effect of energy saving and consumption reduction.
Patent Information
- Application Number
- CN202423176584.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Small-scale wastewater treatment equipment suffers from high energy consumption and high equipment costs due to its small treatment capacity and the use of traditional large-scale equipment.
A pipeline assembly driven by an air supply component replaces the traditional mechanical mixing equipment and pump-driven recirculation equipment. The air supply component provides kinetic energy and includes a first mixing component, a sewage recirculation component, and a sludge recirculation component, which are respectively composed of a first air supply pipe, a mixing pipe, a second air supply pipe and a second recirculation pipe, a third air supply pipe and a second recirculation pipe.
It reduces energy waste, lowers equipment costs, and makes it easier to match energy with the required energy, resulting in significant energy savings.
Smart Images
Figure CN223620229U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of environmental protection equipment technology, specifically relating to an energy-saving small-scale sewage treatment equipment and system. Background Technology
[0002] A typical wastewater treatment system requires several types of supporting equipment, such as return pumps, sludge pumps and other lifting devices, mixing and stirring devices, and air supply devices. These devices are usually designed for large-scale wastewater ponds, so they provide a large amount of kinetic energy and have a high cost and energy consumption.
[0003] However, small-scale sewage treatment equipment requires very little energy due to its small capacity, so using the aforementioned equipment would be a huge waste and very expensive. Utility Model Content
[0004] This utility model provides an energy-saving small-scale sewage treatment equipment and system, aiming to provide a treatment equipment and system suitable for small sewage ponds, reducing waste and cost.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] In a first aspect, embodiments of this utility model provide an energy-saving small-scale sewage treatment device, comprising:
[0007] Gas supply components are used as a gas source to supply gas;
[0008] The first stirring component is used to stir the sludge. The first stirring component includes a first air supply pipe and a stirring pipe. One end of the first air supply pipe is connected to the air supply component. The two ends of the stirring pipe are respectively provided with a first liquid inlet and a first liquid outlet, and are connected to and communicate with the first air supply pipe. The connection between the first air supply pipe and the stirring pipe is adapted to be placed below the liquid surface.
[0009] A wastewater recirculation assembly is used to recirculate wastewater from one treatment tank to another. The assembly includes a second air supply pipe and a first recirculation pipe. One end of the second air supply pipe is connected to the air supply assembly. One end of the first recirculation pipe is provided with a second liquid inlet and a second liquid outlet. The first recirculation pipe is connected to the second air supply pipe, and the connection point is adapted to be below the liquid surface.
[0010] A sludge return assembly is used to return sludge from a sedimentation tank to an anaerobic tank. The sludge return assembly includes a third air supply pipe and a second return pipe. One end of the third air supply pipe is connected to the air supply assembly. One end of the second return pipe is provided with a third liquid inlet and a third liquid outlet. The second return pipe is connected to the third air supply pipe, and the connection is adapted to be placed below the liquid surface.
[0011] In conjunction with the first aspect, in one possible implementation of the energy-saving small sewage treatment equipment provided by this utility model, the bottom of the second return pipe is provided with a sludge suction part, the sludge suction part is arranged horizontally, and a plurality of the third liquid inlets are opened at the bottom.
[0012] In conjunction with the first aspect, in one possible implementation of the energy-saving small sewage treatment equipment provided by this utility model, a first valve is provided on the first gas supply pipe, the second gas supply pipe and the third gas supply pipe.
[0013] Secondly, embodiments of this utility model also provide an energy-saving small-scale sewage treatment system, including the aforementioned energy-saving small-scale sewage treatment equipment, and further including:
[0014] The wastewater treatment pond contains, in sequence, an anaerobic pond, an anoxic pond, an aerobic pond, a sedimentation pond, and a clear water pond;
[0015] An oxygen supply assembly, located within the anoxic pool and connected to the gas supply assembly, is used to supply oxygen to the anoxic pool; and
[0016] A pneumatic stirring assembly is installed inside the clear water tank and connected to the air supply assembly, used to blow air into the clear water tank for stirring;
[0017] The first stirring assembly is provided in both the anaerobic tank and the aerobic tank. The first liquid inlet of the stirring pipe is located at the lower part of the anaerobic tank or the aerobic tank, and the first liquid outlet is located above the liquid surface.
[0018] The second inlet of the first return pipe in the wastewater return assembly is located in the aerobic tank, and the second outlet is located in the anoxic tank; the second gas supply pipe is located in the aerobic tank.
[0019] The third inlet on the second return pipe of the sludge return assembly is located at the bottom of the sedimentation tank, and the third outlet is located on the upper side of the anaerobic tank.
[0020] In conjunction with the second aspect, in one possible implementation of the energy-saving small-scale wastewater treatment equipment provided by this utility model, the oxygen supply component includes:
[0021] A fourth gas supply pipe, one end of which is connected to the gas supply assembly, is equipped with a first valve; and
[0022] An air distribution pipe is located at the bottom of the fourth air supply pipe and is connected to the fourth air supply pipe. Several fourth air outlets are opened at the bottom of the air distribution pipe.
[0023] In conjunction with the second aspect, in one possible implementation of the energy-saving small-scale sewage treatment equipment provided by this utility model, the pneumatic stirring assembly includes:
[0024] The fifth gas supply pipe has one end connected to the gas supply assembly, and the fifth gas supply pipe is equipped with a first valve; and
[0025] An air outlet pipe is located at the bottom of the fifth air supply pipe and is connected to the fifth air supply pipe. Several fifth air outlets are opened at the bottom of the air outlet pipe.
[0026] In conjunction with the second aspect, in one possible implementation of the energy-saving small sewage treatment equipment provided by this utility model, a sludge discharge port is provided in the middle of the second return pipe, and a second valve is provided on both the sludge discharge port and the third liquid discharge port.
[0027] The beneficial effects of the energy-saving small-scale sewage treatment equipment provided by this utility model are as follows: Compared with the prior art, the energy-saving small-scale sewage treatment equipment provided by this utility model uses a first gas supply pipe and a stirring pipe to form a first stirring component, replacing the traditional mechanical stirring equipment; it uses a second gas supply pipe and a first return pipe to form a sewage return component, and a third gas supply pipe and a second return pipe to form a sludge return component, replacing the traditional return equipment driven by a pump body. All of these components are connected to a gas supply component, and the kinetic energy is provided by a single gas supply component. The generated kinetic energy is more easily matched with the required kinetic energy, reducing waste and greatly reducing the equipment cost.
[0028] The beneficial effects of the energy-saving small-scale sewage treatment system provided by this utility model are as follows: Compared with the prior art, the energy-saving small-scale sewage treatment system provided by this utility model adopts the above-mentioned energy-saving small-scale sewage treatment equipment. The first stirring component is composed of a first air supply pipe and a stirring pipe, replacing the traditional mechanical stirring equipment; the sewage return component is composed of a second air supply pipe and a first return pipe, and the sludge return component is composed of a third air supply pipe and a second return pipe, replacing the traditional return equipment driven by the pump body. All of them are connected to the air supply component, and the kinetic energy is provided by a single air supply component. The generated kinetic energy is more easily matched with the required kinetic energy, reducing waste and greatly reducing the equipment cost. Attached Figure Description
[0029] Figure 1 A schematic diagram of the structure of an energy-saving small-scale sewage treatment system provided in an embodiment of this utility model;
[0030] Explanation of reference numerals in the attached figures:
[0031] 10. Gas supply assembly; 11. First gas delivery pipe; 12. Stirring pipe; 13. First liquid inlet;
[0032] 14. First drain outlet; 21. Second gas supply pipe; 22. First return pipe; 23. Second inlet;
[0033] 24. Second drain outlet; 31. Third gas supply pipe; 32. Second return pipe; 33. Sludge suction section;
[0034] 34. Third liquid inlet; 35. Third liquid outlet; 36. Sludge outlet;
[0035] 37. Second valve; 40. First valve; 51. Fourth gas pipeline;
[0036] 52. Air distribution pipe; 53. Fourth air outlet; 61. Fifth air supply pipe; 62. Air outlet pipe;
[0037] 63. Fifth air outlet; 71. Anaerobic tank; 72. Anoxic tank; 73. Aerobic tank;
[0038] 74. Sedimentation tank; 75. Clear water tank. Detailed Implementation
[0039] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0043] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0044] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.
[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.
[0046] Please refer to the following: Figure 1The present invention provides an energy-saving small-scale sewage treatment device. The energy-saving small-scale sewage treatment device includes an air supply component 10, a first stirring component, a sewage return component, and a sludge return component. The air supply component 10 is used as an air source to supply air. The first stirring component is used to stir the sludge and includes a first air supply pipe 11 and a stirring pipe 12. One end of the first air supply pipe 11 is connected to the air supply component 10. The two ends of the stirring pipe 12 are respectively provided with a first liquid inlet 13 and a first liquid outlet 14, which are connected to and communicate with the first air supply pipe 11. The connection between the first air supply pipe 11 and the stirring pipe 12 is suitable to be placed below the liquid surface. The sewage return component is used to return sewage from one treatment tank to another treatment tank. The sewage return component includes a first air supply pipe 10, a first stirring component, a sewage return component, and a sludge return component. The second gas supply pipe 21 and the first return pipe 22 are connected. One end of the second gas supply pipe 21 is connected to the gas supply component 10. One end of the first return pipe 22 is provided with a second liquid inlet 23 and a second liquid outlet 24. The first return pipe 22 is connected to the second gas supply pipe 21, and the connection is suitable to be placed below the liquid surface. The sludge return component is used to return the sludge in the sedimentation tank 74 to the anaerobic tank 71. The sludge return component includes a third gas supply pipe 31 and a second return pipe 32. One end of the third gas supply pipe 31 is connected to the gas supply component 10. One end of the second return pipe 32 is provided with a third liquid inlet 34 and a third liquid outlet. The second return pipe 32 is connected to the third gas supply pipe 31, and the connection is suitable to be placed below the liquid surface.
[0047] It should be noted that the small-scale sewage treatment equipment mentioned here refers to equipment with a daily treatment capacity of less than one ton, mainly used for testing.
[0048] The air supply component 10 is an existing air pump or fan that provides power to the entire equipment.
[0049] In the first mixing assembly, wastewater enters the mixing pipe 12 from the first inlet 13, and then a large amount of gas is injected into the wastewater in the mixing pipe 12 through the first gas supply pipe 11, causing the wastewater in the mixing pipe 12 to overflow from the first outlet 14 at the top, and then the wastewater at the bottom is continuously carried to the top through the mixing pipe 12 to achieve a mixing effect.
[0050] In the wastewater recirculation assembly, wastewater enters the first recirculation pipe 22 from the second inlet 23, and then a large amount of gas is injected into the wastewater in the first recirculation pipe 22 through the second gas supply pipe 21, causing the wastewater to overflow from the second outlet 24 of the first recirculation pipe 22, thus achieving the wastewater recirculation effect.
[0051] In the sludge recirculation assembly, sludge enters the second recirculation pipe 32 through the third inlet 34, and then a large amount of gas is injected into the sludge in the second recirculation pipe 32 through the third gas supply pipe 31, causing the sludge to overflow from the third outlet of the second recirculation pipe 32, thus achieving the sludge recirculation effect. Specifically, the sludge has a high water content and a certain degree of fluidity.
[0052] It should be noted that the viscosity of sewage is greater than that of clean water. The bubbles generated after the gas is introduced are relatively difficult to break, causing the bubbles to carry the sewage out and achieve the lifting effect.
[0053] Therefore, the wastewater treatment equipment provided in this embodiment mainly consists of a blower and multiple pipes, which greatly reduces the equipment cost compared to existing mechanical stirring equipment, reflux pumps and pipes that make up reflux equipment.
[0054] The beneficial effects of the energy-saving small-scale sewage treatment equipment provided by this utility model embodiment are as follows: Compared with the prior art, the energy-saving small-scale sewage treatment equipment provided by this utility model embodiment forms a first stirring component through a first air supply pipe 11 and a stirring pipe 12, replacing the traditional mechanical stirring equipment; a sewage return component is formed through a second air supply pipe 21 and a first return pipe 22, and a sludge return component is formed through a third air supply pipe 31 and a second return pipe 32, replacing the traditional return equipment driven by a pump body. All of them are connected to the air supply component 10, and the kinetic energy is provided by one air supply component 10. The generated kinetic energy is more easily matched with the required kinetic energy, reducing waste and greatly reducing the equipment cost.
[0055] like Figure 1 As shown, in a specific embodiment of the energy-saving small sewage treatment equipment provided in this utility model, the bottom of the second return pipe 32 is provided with a sludge suction part 33, which is arranged horizontally and has several third liquid inlets 34 at the bottom to facilitate the suction of sludge from the bottom.
[0056] like Figure 1 As shown, in a specific embodiment of the energy-saving small sewage treatment equipment provided in this utility model, a first valve 40 is provided on the first gas supply pipe 11, the second gas supply pipe 21 and the third gas supply pipe 31.
[0057] Based on the same inventive concept, this utility model embodiment also provides an energy-saving small-scale sewage treatment system, including the above-mentioned energy-saving small-scale sewage treatment equipment, and further including a sewage treatment tank, an oxygen supply component, and a pneumatic stirring component. The sewage treatment tank is provided with an anaerobic tank 71, an anoxic tank 72, an aerobic tank 73, a sedimentation tank 74, and a clear water tank 75 in sequence. The oxygen supply component is located in the anoxic tank 72 and is connected to the air supply component 10 to supply oxygen to the anoxic tank 72. The pneumatic stirring component is located in the clear water tank 75 and is connected to the air supply component 10 to blow air into the clear water tank 75 for stirring.
[0058] Both the anaerobic tank 71 and the aerobic tank 73 are equipped with a first stirring component. The first inlet 13 of the stirring pipe 12 is located at the bottom of the anaerobic tank 71 or the aerobic tank 73, and the first outlet 14 is located above the liquid surface. A large amount of gas is injected into the sewage in the stirring pipe 12 through the first gas supply pipe 11, so that the sewage in the stirring pipe 12 overflows from the first outlet 14 at the top. In turn, the sewage at the bottom of the anaerobic tank 71 is continuously carried to the top through the stirring pipe 12 to achieve the stirring effect.
[0059] It should be noted that the first stirring component in anaerobic tank 71 is normally inactive, only occasionally turned on for a few minutes to prevent sludge from settling at the bottom, and will not affect its anaerobic environment. The first stirring component in aerobic tank 73 serves both stirring and oxygenation purposes.
[0060] The second inlet 23 of the first return pipe 22 in the wastewater return assembly is located in the aerobic tank 73, and the second outlet 24 is located in the anoxic tank 72; the second gas supply pipe 21 is located in the aerobic tank 73. Specifically, the first return pipe 22 has an inverted U-shaped structure and is used to return the wastewater from the aerobic tank 73 to the anoxic tank 72.
[0061] The third inlet 34 on the second return pipe 32 in the sludge return assembly is located at the bottom of the sedimentation tank 74, and the third outlet is located on the upper side of the anaerobic tank 71, which is used to return the sludge at the bottom of the sedimentation tank 74 to the anaerobic tank 71.
[0062] The beneficial effects of the energy-saving small-scale sewage treatment system provided by this utility model embodiment are as follows: Compared with the prior art, the energy-saving small-scale sewage treatment system provided by this utility model embodiment adopts the above-mentioned energy-saving small-scale sewage treatment equipment. The first stirring component is formed by the first air supply pipe 11 and the stirring pipe 12, replacing the traditional mechanical stirring equipment; the sewage return component is formed by the second air supply pipe 21 and the first return pipe 22, and the sludge return component is formed by the third air supply pipe 31 and the second return pipe 32, replacing the traditional return equipment driven by the pump body. All of them are connected to the air supply component 10, and the kinetic energy is provided by one air supply component 10. The generated kinetic energy is more easily matched with the required kinetic energy, reducing waste and greatly reducing the equipment cost.
[0063] like Figure 1 As shown, in a specific embodiment of the energy-saving small sewage treatment equipment provided in this utility model, the oxygen supply component includes a fourth gas supply pipe 51 and a gas distribution pipe 52. One end of the fourth gas supply pipe 51 is connected to the gas supply component 10, and a first valve 40 is provided on the fourth gas supply pipe 51. The gas distribution pipe 52 is located at the bottom of the fourth gas supply pipe 51 and is connected to the fourth gas supply pipe 51. Several fourth gas outlets 53 are opened at the bottom of the gas distribution pipe 52 to make the gas distribution more uniform.
[0064] like Figure 1As shown, in a specific embodiment of the energy-saving small sewage treatment equipment provided in this utility model, the pneumatic stirring assembly includes a fifth air supply pipe 61 and an air outlet pipe 62. One end of the fifth air supply pipe 61 is connected to the air supply assembly 10, and a first valve 40 is provided on the fifth air supply pipe 61. The air outlet pipe 62 is located at the bottom of the fifth air supply pipe 61 and is connected to the fifth air supply pipe 61. Several fifth air outlets 63 are opened at the bottom of the air outlet pipe 62. By stirring the liquid in the clear water tank 75 with gas, the residual impurities in the clear water tank 75 are prevented from settling at the bottom of the clear water tank 75, so that the residual impurities are discharged with the clear water, reducing the frequency of cleaning the clear water tank 75, or even avoiding cleaning the clear water tank 75.
[0065] like Figure 1 As shown, in a specific embodiment of the energy-saving small sewage treatment equipment provided in this utility model, the second return pipe 32 is provided with a sludge discharge port in the middle, and both the sludge discharge port and the third liquid discharge port are provided with a second valve 35.
[0066] It should be noted that when it is necessary to return the sludge in the sedimentation tank 74 to the anaerobic tank 71, the second valve 35 of the sludge discharge port should be closed and the second valve 35 of the third liquid discharge port should be opened; when it is necessary to drain all the sludge in the sedimentation tank 74, the second valve 35 of the vent should be opened and the second valve 35 of the third liquid discharge port should be closed.
[0067] Each of the first gas pipeline 11 to the fifth gas pipeline is equipped with a first valve 40. By opening or closing the first valve 40 or adjusting its opening degree, the start / stop and power of the first stirring component, the pneumatic stirring component, the sewage return component, the sludge return component, and the oxygen supply component can be controlled.
[0068] The working process of the energy-saving small-scale sewage treatment system provided in this embodiment is as follows:
[0069] After the wastewater is lifted into the anaerobic tank 71, once the liquid level in the tank is normal, the blower is turned on and the first valve 40 on the first gas supply pipe 11 of the first stirring component in the anaerobic tank 71 is opened to stir the gas. The valve opening is adjusted to ensure uniform gas distribution, and the dissolved oxygen concentration in the effluent is required to be within the range of 0.2 mg / L.
[0070] Wastewater in anaerobic tank 71 flows by gravity into anoxic tank 72. The first valve 40 on the fourth gas supply pipe 51 in the oxygen supply assembly is opened and the opening degree is adjusted so that the dissolved oxygen concentration in the effluent is within the range of 0.2 mg / L-0.5 mg / L.
[0071] Wastewater flows into aerobic tank 73 by gravity. The first valve 40 on the first air supply pipe 11 of the first stirring component in aerobic tank 73 is opened to carry out aerobic aeration. The valve is adjusted to require the dissolved oxygen concentration of the effluent to be 2mg / L-4mg / L.
[0072] Wastewater flows by gravity into sedimentation tank 74. A sludge pipe is installed at the bottom of sedimentation tank 74, and the sludge is returned to anaerobic tank 71 through the sludge return component. The remaining sludge is discharged through sludge discharge port 36.
[0073] After the system is running normally, open the first valve 40 on the second air supply pipe 21 of the sewage return component installed in the aerobic tank 73 to allow the sewage in the aerobic tank 73 to return to the anoxic tank 72 for mixed liquor return.
[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An energy-saving small-scale sewage treatment device, characterized in that, include: Gas supply components are used as a gas source to supply gas; The first stirring component is used to stir the sludge. The first stirring component includes a first air supply pipe and a stirring pipe. One end of the first air supply pipe is connected to the air supply component. The two ends of the stirring pipe are respectively provided with a first liquid inlet and a first liquid outlet, and are connected to and communicate with the first air supply pipe. The connection between the first air supply pipe and the stirring pipe is adapted to be placed below the liquid surface. A wastewater recirculation assembly is used to recirculate wastewater from one treatment tank to another treatment tank. The wastewater recirculation assembly includes a second gas supply pipe and a first recirculation pipe. One end of the second gas supply pipe is connected to the gas supply assembly. One end of the first recirculation pipe is provided with a second liquid inlet and a second liquid outlet. The first recirculation pipe is connected to the second gas supply pipe, and the connection is adapted to be placed below the liquid surface. as well as A sludge return assembly is used to return sludge from a sedimentation tank to an anaerobic tank. The sludge return assembly includes a third air supply pipe and a second return pipe. One end of the third air supply pipe is connected to the air supply assembly. One end of the second return pipe is provided with a third liquid inlet and a third liquid outlet. The second return pipe is connected to the third air supply pipe, and the connection is adapted to be placed below the liquid surface.
2. The energy-saving small-scale sewage treatment equipment as described in claim 1, characterized in that, The bottom of the second return pipe is provided with a sludge suction section, which is arranged horizontally and has several third liquid inlets at the bottom.
3. The energy-saving small-scale sewage treatment equipment as described in claim 1, characterized in that, The first gas supply pipe, the second gas supply pipe, and the third gas supply pipe are all equipped with a first valve.
4. An energy-saving small-scale sewage treatment system, characterized in that, Including the energy-saving small-scale wastewater treatment equipment as described in any one of claims 1-3, further comprising: The wastewater treatment pond contains, in sequence, an anaerobic pond, an anoxic pond, an aerobic pond, a sedimentation pond, and a clear water pond; An oxygen supply assembly, located within the anoxic pool and connected to the gas supply assembly, is used to supply oxygen to the anoxic pool; and A pneumatic stirring assembly is installed inside the clear water tank and connected to the air supply assembly, used to blow air into the clear water tank for stirring; The first stirring assembly is provided in both the anaerobic tank and the aerobic tank. The first liquid inlet of the stirring pipe is located at the lower part of the anaerobic tank or the aerobic tank, and the first liquid outlet is located above the liquid surface. The second inlet of the first return pipe in the wastewater return assembly is located in the aerobic tank, and the second outlet is located in the anoxic tank; the second gas supply pipe is located in the aerobic tank. The third inlet on the second return pipe of the sludge return assembly is located at the bottom of the sedimentation tank, and the third outlet is located on the upper side of the anaerobic tank.
5. The energy-saving small-scale sewage treatment system as described in claim 4, characterized in that, The oxygen supply assembly includes: A fourth gas supply pipe, one end of which is connected to the gas supply assembly, is equipped with a first valve; and An air distribution pipe is located at the bottom of the fourth air supply pipe and is connected to the fourth air supply pipe. Several fourth air outlets are opened at the bottom of the air distribution pipe.
6. The energy-saving small-scale sewage treatment system as described in claim 4, characterized in that, The pneumatic stirring assembly includes: The fifth gas supply pipe has one end connected to the gas supply assembly, and the fifth gas supply pipe is equipped with a first valve; and An air outlet pipe is located at the bottom of the fifth air supply pipe and is connected to the fifth air supply pipe. Several fifth air outlets are opened at the bottom of the air outlet pipe.
7. The energy-saving small-scale sewage treatment system as described in claim 4, characterized in that, The second return pipe is provided with a sludge discharge port in the middle, and both the sludge discharge port and the third liquid discharge port are provided with a second valve.