A kind of rural domestic sewage enhanced anaerobic treatment equipment and method

Abstract

The present invention relates to the technical field of sewage treatment, and discloses an enhanced anaerobic treatment device and method for rural domestic sewage, the device comprising a tank body, wherein a first plate body and a second plate body are arranged in intervals along the first direction in the tank body, the first plate body and the second plate body separate the interior of the tank body into a regulating tank, an anaerobic tank, and a clear water tank; the regulating tank is provided with a water inlet, the bottom of the first plate body is provided with a first pipe along the first direction, the first pipe extends into the anaerobic tank, the first pipe is provided with a first inlet and a first outlet; the anaerobic tank is provided with an air collecting hood between the water hole and the first pipe; the clear water tank is provided with a water outlet. The beneficial effects of the present invention are as follows: the mass transfer between sewage and sludge in the anaerobic tank is sufficient, the anaerobic treatment efficiency of rural domestic sewage is improved, the sewage after anaerobic treatment is converted into clear water to realize water resource reuse, and at the same time, the biogas generated by the anaerobic reaction is stored for easy use.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to equipment and method for enhanced anaerobic treatment of rural domestic sewage. Background Art

[0002] As a highly efficient and low-cost sewage treatment process, anaerobic sewage treatment has been widely used in municipal and industrial applications. At the same time, organic nitrogen and phosphorus in rural domestic sewage are converted into fast-acting nitrogen and phosphorus that can be directly used by crops after anaerobic treatment. After eliminating the pollution risks such as heavy metals and pathogenic microorganisms, the effluent can be directly used for resource utilization.

[0003] The efficient operation of anaerobic wastewater treatment process must meet two conditions: 1) being able to maintain a large anaerobic sludge concentration; 2) maintaining good mass transfer between wastewater and sludge.

[0004] Three-chamber septic tank or fermentation tank is a common traditional anaerobic reactor in rural areas. Since the sludge inside the anaerobic tank is in a static state, the mass transfer between sewage and sludge is insufficient, the sewage treatment efficiency is low, and it cannot meet the needs of direct resource utilization. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for enhanced anaerobic treatment of rural domestic sewage, so as to ensure sufficient mass transfer between sewage and sludge in the anaerobic tank, improve the efficiency of anaerobic treatment of rural domestic sewage, enable the sewage after anaerobic treatment to be converted into clean water and realize water resource reuse, and at the same time store the biogas generated by the anaerobic reaction for easy utilization.

[0006] In order to achieve the above-mentioned object, the present invention provides a rural domestic sewage enhanced anaerobic treatment equipment, wherein a first plate body and a second plate body are arranged in a first direction in the tank body, and the first plate body and the second plate body separate the inside of the tank body into a regulating tank, an anaerobic tank, and a clear water tank;

[0007] The regulating tank is used to regulate the inflow of sewage and balance the water quality, and the regulating tank is provided with a water inlet;

[0008] A first pipe is provided at the bottom of the first plate body along the first direction, the first pipe extends into the anaerobic tank, and the first pipe is provided with a first inlet and a first outlet; the first inlet is provided in the regulating tank, the first outlet is provided in the anaerobic tank, and the first outlet is provided toward the bottom of the anaerobic tank; a water hole is provided at the top of the second plate body to connect the anaerobic tank with the clean water tank;

[0009] The anaerobic tank is used for anaerobic reaction of sewage. The anaerobic tank is provided with an air collecting hood between the water hole and the first pipe. The air collecting hood is provided with an exhaust pipe connected to the gas storage tank outside the tank body. The gas storage tank is used to store biogas after anaerobic reaction of sewage.

[0010] The sewage flows into the regulating tank through the water inlet and enters the anaerobic tank through the first pipe, and the sludge at the bottom of the anaerobic tank is impacted and stirred. The sewage enters the clean water tank through the water hole after anaerobic reaction and is stored in the clean water tank. The clean water tank is provided with a water outlet.

[0011] Furthermore, it also includes a swirl device, which includes a first pump body and a nozzle, the first pipeline includes a first branch pipe and a second branch pipe, the first branch pipe is arranged along the first direction, and one end is arranged at the first inlet, and the other end is connected to the second branch pipe, the second branch pipe is arranged along the third direction, and the first outlet is provided at the bottom, the first pump body is installed on the first branch pipe, the top of the second branch pipe is closed, and the nozzles are evenly distributed on the side wall circumferentially.

[0012] Furthermore, it also includes a cleaning device, which includes a sealing cover, a forward and reverse motor, a mounting frame, and a first brush head assembly. The sealing cover is arranged in the clean water tank and fixed to the second plate body. The forward and reverse motor is installed in the sealing cover, and the output end passes through the second plate body and extends into the anaerobic tank. The mounting frame and the first brush head assembly are arranged in the anaerobic tank, one end of the mounting frame is connected to the output end of the forward and reverse motor, and the other end is rotatably connected to the first plate body. The mounting frame is provided with the first brush head assembly on both sides of the tank body in the radial direction, which is used to scrub the side walls of the regulating tank.

[0013] Furthermore, the mounting frame includes two mounting plates and two mounting shafts, the two mounting plates are spaced apart along the first direction, both ends of the two mounting plates are connected to a mounting shaft, and the first brush head assembly is connected to the mounting shaft.

[0014] Furthermore, the first brush head assembly includes a connecting seat, a plurality of arc-shaped plates, and a plurality of first springs; the connecting seat is sleeved on the mounting shaft and is rotatably connected to the mounting shaft; the outer wall of the connecting seat is circumferentially provided with the arc-shaped plate; the inner wall of the arc-shaped plate is radially connected with a connecting rod; the outer wall of the arc-shaped plate is evenly distributed with bristles; a countersunk hole is provided on the connecting seat; the other end of the connecting rod is inserted into the countersunk hole, and a fixing screw is connected to the end; the connecting rod can slide axially along the countersunk hole; the connecting rod is sleeved with the first spring; one end of the first spring is against the inner wall of the arc-shaped plate, and the other end is against the connecting seat; the first spring has a tendency to push the arc-shaped plate close to the side wall of the anaerobic tank.

[0015] Furthermore, a sealing cover is provided at one end of the countersunk hole facing the mounting shaft, and a bellows is provided on the first spring sleeve, one end of the bellows is connected to the arc plate, and the other end is connected to the connecting seat.

[0016] Furthermore, the connecting seat includes a first seat body and a second seat body, and the first seat body and the second seat body are provided with arc-shaped holes on the side walls facing the mounting shaft, and the two arc-shaped holes cooperate to form a connecting hole sleeved on the mounting shaft, and the first seat body is provided with first limiting bosses at both ends in the long side direction facing the second seat body, and the second seat body is provided with limiting grooves corresponding to the first limiting bosses, the side wall of the first seat body is circumferentially connected with three arc-shaped plates, and the side wall of the second seat body is circumferentially connected with one arc-shaped plate, and the first seat body and the second seat body are fixedly connected by screws.

[0017] Furthermore, the cleaning device also includes two second brush head assemblies, and each of the side walls of the two first plates that are arranged opposite to each other in the first direction is connected to a second brush head assembly, one of the second brush head assemblies is used to scrub the side walls of the first plate, and the other second brush head assembly is used to scrub the side walls of the second plate.

[0018] Furthermore, the second brush head assembly includes a connecting plate and two second springs, both ends of the connecting plate are respectively sleeved on one of the mounting shafts, the circumferential end surface of the connecting plate away from the mounting shaft is evenly distributed with bristles, the second spring is sleeved on the mounting shaft, one end of the second spring is against the mounting plate, and the other end is against the connecting plate, and the second spring has a tendency to push the connecting plate away from the mounting shaft.

[0019] Furthermore, it also includes a driving component, the air collecting hood includes a first hood body, a second hood body and a telescopic hood, the first hood body and the second hood body are arranged opposite to each other in the second direction, one end of the telescopic hood is connected to the first hood body, and the other end is connected to the second hood body, the output end of the driving component is respectively connected to the first hood body and the second hood body, and the driving component can drive the first hood body and the second hood body to move toward or away from each other along the second direction to extend or contract the telescopic hood.

[0020] Furthermore, the driving assembly includes a servo motor and a driving gear; the first cover body and the second cover body are relatively connected to a limited seat in the first direction;

[0021] The servo motor is arranged outside the tank, and the output end thereof extends into the anaerobic tank and is detachably connected to the driving gear;

[0022] The side walls of the two limiting seats arranged opposite to each other are provided with U-shaped limiting grooves along the second direction, and the side walls of the U-shaped limiting grooves facing the driving gear are provided with toothed portions along the second direction. The driving gear is clamped in the two U-shaped limiting grooves and meshes with the toothed portions.

[0023] Furthermore, the driving assembly also includes four guide rods, the cross-section of the guide rods in the radial direction is rectangular, the top of the guide rods is fixed to the tank body, the four guide rods are arranged in pairs in the first direction and the second direction, the limit seat is provided with guide holes corresponding to the guide rods, the long side direction of the guide holes is arranged along the second direction, the guide rods pass through the guide holes, and a second limit boss is provided at the bottom.

[0024] Furthermore, a slide groove is formed on one end surface of the first cover body toward the second cover body along the second direction, the second cover body is arranged on a guide boss corresponding to the slide groove, the guide boss is inserted in the slide groove, and the telescopic cover is sleeved outside the guide boss.

[0025] Furthermore, an exhaust port is provided on the top of the first cover body and / or the second cover body, the exhaust duct includes a flexible hose, the exhaust port is connected to the flexible hose, an exhaust channel corresponding to the flexible hose is provided on the top of the tank body, the exhaust channel is connected to the gas storage tank, and the exhaust channel is provided with a pressure regulating valve.

[0026] Furthermore, it also includes a sewage discharge device, a sewage discharge pipe is provided at the bottom of the anaerobic tank, and the sewage discharge device includes a driving motor, a stirring shaft, a spiral blade, a valve, and a suction pump;

[0027] The sewage pipe includes a first pipe section and a second pipe section, the first pipe section is arranged along the third direction, and the second pipe section is arranged along the first direction; one axial end of the first pipe section is connected to the anaerobic tank, and the outer wall of the other end is fixedly provided with the driving motor, the output end of the driving motor extends into the first pipe section and is connected to a stirring shaft, the stirring shaft is coaxially arranged with the first pipe section, and the stirring shaft is connected to the spiral blade, one end of the second pipe section is connected to the side wall of the first pipe section, and the other end is provided with a sewage outlet, and the first pipe section is provided with the valve and the suction pump spaced apart in the first direction near the sewage outlet.

[0028] The present invention also provides a method for enhanced anaerobic treatment of rural domestic sewage, based on any of the above-mentioned enhanced anaerobic treatment equipment for rural domestic sewage, comprising the following steps:

[0029] S1. Treat the inflow and quality of sewage;

[0030] S2, the sewage undergoes anaerobic reaction to produce biogas and stirs the sludge;

[0031] S3, collecting the biogas and performing secondary clarification on the sewage after the anaerobic reaction.

[0032] Compared with the prior art, the embodiment of the present invention provides an enhanced anaerobic treatment device and method for rural domestic sewage, and its beneficial effects are as follows: a first pipeline is provided, the first pipeline extends into the anaerobic tank, the first pipeline is provided with a first inlet and a first outlet, the first outlet is arranged toward the bottom of the anaerobic tank, and a gas collecting hood is provided, the biogas generated in the anaerobic tank is at the top of the gas collecting hood, when the accumulated biogas reaches a certain volume, the exhaust pipeline is connected to the gas storage tank, the gas in the gas collecting hood is discharged in large quantities, and the biogas is stored in the gas storage tank for easy use. At this time, the liquid level in the anaerobic tank drops rapidly, and under the action of the liquid level difference, the sewage enters the anaerobic tank from the first pipeline, and the bottom of the anaerobic tank is impacted and stirred, so that the sludge and sewage are mixed, and the mass transfer efficiency between the sludge and the sewage is improved. At the same time, a clear water tank is provided to store the sewage after anaerobic treatment, so that water resources can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural principle diagram of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the enhanced anaerobic treatment equipment for rural domestic sewage according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the assembly of a cleaning device of the rural domestic sewage enhanced anaerobic treatment equipment according to an embodiment of the present invention;

[0036] Figure 4 2 is a schematic diagram of the structure of a cyclone device of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0037] Figure 5 is a top view of a cyclone device of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0038] Figure 6 2 is a schematic structural diagram of a cleaning device of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0039] Figure 7 2 is a schematic structural diagram of a second brush head assembly of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0040] Figure 8 2 is a schematic structural diagram of a first brush head assembly of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of a connection seat of a rural domestic sewage enhanced anaerobic treatment device according to an embodiment of the present invention;

[0042] Fig.10 2 is a schematic structural diagram of another viewing angle of the first brush head assembly of the rural domestic sewage enhanced anaerobic treatment equipment according to an embodiment of the present invention;

[0043] Fig.11 is a cross-sectional view of a first brush head assembly of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0044] Fig.12 This is a structural principle diagram of a driving component of a rural domestic sewage enhanced anaerobic treatment device according to an embodiment of the present invention;

[0045] Fig.13 is a cross-sectional view of an air collecting hood of an enhanced anaerobic treatment device for rural domestic sewage according to an embodiment of the present invention;

[0046] Fig.14 It is a structural schematic diagram of the sewage discharge device of the rural domestic sewage enhanced anaerobic treatment equipment according to an embodiment of the present invention.

[0047] In the figure:

[0048] 1. tank body; 11. first plate body; 12. second plate body; 121. water hole;

[0049] 2. Regulating tank; 21. Water inlet;

[0050] 3. Anaerobic tank; 31. Sewage pipe; 311. First pipe section; 312. Second pipe section; 3121. Sewage outlet; 32. Exhaust channel;

[0051] 4. Clean water tank; 41. Water outlet;

[0052] 5. first pipeline; 51. first branch pipe; 52. second branch pipe;

[0053] 6. Air collecting hood; 600. Exhaust port; 61. First hood body; 611. Slide groove; 62. Second hood body; 621. Guide boss; 63. Limiting seat; 631. U-shaped limiting groove; 632. Tooth-shaped portion; 633. Guide hole; 64. Telescopic hood;

[0054] 7. swirl device, 71. first pump body; 72. nozzle;

[0055] 8. Cleaning device; 81. Forward and reverse motor;

[0056] 82, mounting frame; 821, mounting plate; 822, mounting shaft;

[0057] 83, first brush head assembly; 831, connecting seat; 8310, countersunk hole; 8311, first seat body; 83111, first limiting boss; 8312, second seat body; 83121, limiting groove; 832, arc plate; 833, first spring; 834, connecting rod; 835, sealing cover; 836, bellows;

[0058] 84. Second brush head assembly; 841. Connecting plate; 842. Second spring;

[0059] 9. driving assembly; 91. servo motor; 92. driving gear; 93. guide rod; 931. second limiting boss;

[0060] 10. Sewage discharge device; 100. Driving motor; 101. Stirring shaft; 102. Spiral blade; 103. Valve; 104. Suction pump.

[0061] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0062] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. used in the present invention to indicate the orientation or positional relationship are based on the positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred devices and elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In the description of the present invention, it should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0065] like Figures 1 to 14 As shown, a rural domestic sewage enhanced anaerobic treatment equipment of a preferred embodiment of the present invention is used for anaerobic treatment of rural domestic sewage, improving the mass transfer effect of sewage and sludge, and collecting the biogas and clean water produced by anaerobic treatment, respectively utilizing them, and improving resource utilization. It includes a tank body 1, for ease of description, refer to Figure 1 , Figure 2 , the axial direction of the tank body 1 is defined as the first direction X, the width direction of the tank body 1 is defined as the second direction Y, the height direction of the tank body 1 is defined as the third direction Z, and the first direction X, the second direction Y, and the third direction Z are intersected and perpendicular to each other.

[0066] In this embodiment, a first plate body 11 and a second plate body 12 are provided in the tank body 1 along the first direction X, and the first plate body 11 and the second plate body 12 separate the inside of the tank body 1 into a regulating tank 2, an anaerobic tank 3, and a clean water tank 4. Among them, the regulating tank 2 is used to adjust the inflow of sewage and balance the water quality. The regulating tank 2 is provided with a water inlet 21 for connecting external sewage. Since the sludge will be deposited at the bottom of the anaerobic tank 3 after the sewage enters the anaerobic tank 3, in order to improve the mass transfer efficiency between the sewage and the sludge, it is necessary to stir the bottom of the anaerobic tank 3. In this embodiment, in order to reduce the equipment cost, the sludge at the bottom of the anaerobic tank 3 can be stirred regularly without the help of external force to improve the mass transfer efficiency.

[0067] For details, see Figure 4 The bottom of the first plate 11 is provided with a first pipe 5 along the first direction X, the first pipe 5 extends into the anaerobic tank 3, and the first pipe 5 is provided with a first inlet and a first outlet; wherein the first inlet is provided in the regulating tank 2, the first outlet is provided in the anaerobic tank 3, and the first outlet is provided toward the bottom of the anaerobic tank 3, and the first pipe 5 is used to introduce the sewage in the regulating tank 2 into the anaerobic tank 3. The anaerobic tank 3 is used for anaerobic reaction of sewage. In order to collect the biogas generated after the anaerobic reaction, refer to Figure 3The anaerobic tank 3 is provided with an air collecting hood 6 in the third direction Z, that is, the air collecting hood 6 is arranged between the water hole 121 and the first pipe 5, and the air collecting hood 6 is provided with an exhaust pipe (not shown in the figure) connected to the gas storage tank (not shown in the figure) outside the tank body 1, and the gas storage tank is used to store the biogas after the anaerobic reaction of the sewage; in addition, in order to facilitate the storage and utilization of the water after the anaerobic reaction, the top of the second plate body 12 is provided with a water hole 121 connecting the anaerobic tank 3 and the clean water tank 4. The sewage enters the clean water tank 4 through the water hole 121 after the anaerobic reaction and is stored in the clean water tank 4. After clarification, it becomes clean water. In order to facilitate the subsequent utilization of the clean water, refer to Figure 3 A water outlet 41 is provided in the clean water tank 4.

[0068] During the anaerobic reaction, when the biogas accumulated in the gas collecting hood 6 reaches a certain volume, the exhaust pipe is connected to the gas storage tank, and the gas in the gas collecting hood 6 is discharged in large quantities. At this time, the liquid level in the anaerobic tank 3 drops rapidly. Under the action of the liquid level difference, the sewage enters the anaerobic tank 3 from the first pipe 5, and impacts and stirs the bottom of the anaerobic tank 3 to mix the sludge and sewage, thereby improving the mass transfer efficiency between the sludge and sewage.

[0069] In some embodiments, in order to further improve the mass transfer effect between sewage and sludge, refer to Figure 4 The present invention further includes a swirl device 7. Specifically, the swirl device 7 includes a first pump body 71 and a nozzle 72. The first pipeline 5 includes a first branch pipe 51 and a second branch pipe 52. The first branch pipe 51 is arranged along the first direction X, and one end is arranged at the first inlet, and the other end is connected to the second branch pipe 52. The second branch pipe 52 is arranged along the third direction Z, and a first outlet is arranged at the bottom. The first pump body 71 is installed on the first branch pipe 51. The top of the second branch pipe 52 is closed and the nozzles 72 are evenly distributed on the side wall in the circumferential direction. In order to facilitate the arrangement of the nozzle 72, refer to Figure 5 The opening axis of the nozzle 72 and the tangent at the intersection of the outer wall of the second branch pipe 52 are set at a certain angle α, and the value range of the angle α is 40°-60°. When the angle α is greater than 60°, the opening axis of the nozzle 72 is closer to the axis of the second branch pipe 52, and the nozzle 72 is approximately arranged along the radial direction of the second branch pipe 52. The water flow sprayed by each nozzle 72 is not easy to form a swirl, and the stirring effect is poor. When the angle α is less than 40°, the water flow is not easy to spray from the nozzle 72, and it is not easy to form a swirl, and the stirring effect is poor. Therefore, in this embodiment, the value of the angle α is 50°, and the nozzle 72 has a better effect of forming a swirl.

[0070] The first pump body 71 can control the connection and disconnection between the first branch pipe 51 and the regulating tank 2. At the same time, the first pump body 71 can pressurize the water in the first branch pipe 51. When the sludge in the anaerobic tank 3 needs to be stirred, the water sprayed from each nozzle 72 forms a vortex. At the same time, the water from the first outlet impacts the bottom of the anaerobic tank 3. The nozzle 72 and the water sprayed from the first outlet stir the anaerobic tank 3, which can fully transfer the sludge and the sewage. In order to prevent the impurities in the sewage from clogging the nozzle 72, a filter screen (not shown in the figure) is provided in the second branch pipe 52 near the connection between the first branch pipe 51 and the second branch pipe 52. The position of the filter screen in the third direction Z is higher than the end outlet of the first branch pipe 51. The filter screen can initially filter larger impurities to avoid clogging the nozzle 72.

[0071] In the existing anaerobic reaction container, since sludge is easy to accumulate in the anaerobic tank 3 and stains are easy to adhere to the wall of the anaerobic tank 3, after the sewage is discharged, it is necessary to manually clean the wall of the anaerobic tank 3 regularly, which has a high labor intensity. At the same time, since the smell of sludge is easy to remain in the anaerobic tank 3 after the anaerobic reaction, it is not good for the health of workers to be in such a working environment for a long time. Therefore, in some embodiments, the present invention also includes a cleaning device 8, wherein the cleaning device 8 includes a sealing cover, a forward and reverse motor 81, a mounting frame 82, The first brush head assembly 83 and the sealing cover (not shown in the figure) are arranged in the clean water tank 4 and fixed to the second plate body 12. The forward and reverse motor 81 is installed in the sealing cover, and the output end passes through the second plate body 12 and extends to the anaerobic tank 3. The mounting frame 82 and the first brush head assembly 83 are arranged in the anaerobic tank 3. One end of the mounting frame 82 is connected to the output end of the forward and reverse motor 81, and the other end is rotatably connected to the first plate body 11. The mounting frame 82 is provided with the first brush head assembly 83 on both sides of the radial direction of the tank body 1 for scrubbing the side walls of the regulating tank 2. In the present embodiment, since an air collecting hood 6 is provided in the anaerobic tank 3, in order to avoid the interference between the rotation of the mounting frame 82 and the related structures of the air collecting hood 6 during cleaning, a forward and reverse motor 81 is selected. During cleaning, the sludge in the anaerobic tank 3 can be initially discharged through the sewage outlet 3121, and then the clean water in the clean water tank 4 can be introduced into the anaerobic tank 3, and detergent can be added. The forward and reverse motor 81 works to drive the mounting frame 82 to rotate clockwise and counterclockwise by a certain angle. Since the sludge is mainly deposited at the bottom of the anaerobic tank 3 and the clean water is at the top of the anaerobic tank 3, during cleaning, the bottom and the middle position of the anaerobic tank 3 are mainly cleaned. In the present embodiment, the clockwise and counterclockwise rotation angles of the mounting frame 82 are less than or equal to 270°, which can be adjusted according to actual conditions, and the bristles on the first brush head assembly 83 are scrubbed against the side walls of the anaerobic tank 3.

[0072] Furthermore, in order to simplify the structure of the mounting frame 82 and reduce costs, the mounting frame 82 includes two mounting plates 821 and two mounting shafts 822, wherein the two mounting plates 821 are spaced apart along the first direction X, and both ends of the two mounting plates 821 are connected to a mounting shaft 822, and the first brush head assembly 83 is connected to the mounting shaft 822. In order to avoid interference between the mounting frame 82 and the structure of the air collecting hood 6, the length of the mounting shaft 822 is greater than the length of the air collecting hood 6 in the first direction X.

[0073] In order to facilitate the first brush head assembly 83 to clean the pool wall of the anaerobic pool 3, the bristles always adhere to the side wall of the anaerobic pool 3 to improve the cleaning effect, therefore, in some embodiments, the first brush head assembly 83 includes a connecting seat 831, a plurality of arc plates 832, and a plurality of first springs 833, wherein the connecting seat 831 is sleeved on the mounting shaft 822 and is rotatably connected to the mounting shaft 822, the outer wall of the connecting seat 831 is circumferentially provided with an arc plate 832, and the inner wall of the arc plate 832 is radially connected to the connecting rod 833. 34, the outer wall of the arc plate 832 is evenly distributed with bristles a, the connecting seat 831 is provided with a countersunk hole 8310, the other end of the connecting rod 834 is inserted into the countersunk hole 8310, and the end is connected with a fixing screw, the connecting rod 834 can slide along the axial direction of the countersunk hole 8310, and the connecting rod 834 is sleeved with a first spring 833, one end of the first spring 833 is against the inner wall of the arc plate 832, and the other end is against the connecting seat 831, and the first spring 833 has a movement tendency to push the arc plate 832 close to the side wall of the anaerobic tank 3. Specifically, since the connecting seat 831 is rotatably connected to the mounting shaft 822, the connecting seat 831 can be rotatably connected to the mounting shaft 822 by means of structures such as bearings. When cleaning the inner wall of the anaerobic tank 3, since the connecting seat 831 can rotate, the bristles on the circumferentially arranged arc plates 832 can contact the inner wall of the anaerobic tank 3 in turn, thereby preventing the inner wall of the anaerobic tank 3 from contacting the bristles on the same arc plate 832 for a long time during cleaning, causing the bristles on one of the arc plates 832 to wear out faster, thereby affecting the subsequent cleaning effect.

[0074] Due to the presence of the first spring 833, the arc plate 832 can be pushed, so that the bristles are always close to the arc side wall of the anaerobic tank 3 during the cleaning process, thereby improving the cleaning efficiency. Furthermore, since in this embodiment, the number of connecting rods 834 is one, in order to prevent the connecting rod 834 from rotating after installation, at least one limiting plane b is provided on the side wall of the connecting rod 834 along the axial direction, see Fig.10 The number of the limiting planes b is 2 to prevent the connecting rod 834 from rotating after installation, and the portion where the countersunk hole 8310 and the connecting rod 834 are assembled has the same shape as the connecting rod 834.

[0075] Furthermore, in order to prevent impurities from entering the assembly gap between the connecting rod 834 and the counterbore 8310 during the cleaning process, causing the connecting rod 834 to get stuck and the bristles to be unable to fit with the side wall of the anaerobic tank 3, thereby affecting the cleaning efficiency, in this embodiment, refer to Fig.11 A sealing cover 835 is provided at one end of the countersunk hole 8310 facing the mounting shaft 822, and a bellows 836 is provided on the outer sleeve of the first spring 833. One end of the bellows 836 is connected to the arc plate 832, and the other end is connected to the connecting seat 831. The bellows 836 and the sealing cover 835 connect the connecting rod 834 to prevent impurities from entering the assembly gap between the connecting rod 834 and the countersunk hole 8310.

[0076] Furthermore, in order to facilitate the design of the connecting seat 831 and the arrangement of the arc plate 832, refer to Fig. 9 The connecting seat 831 includes a first seat body 8311 and a second seat body 8312. The first seat body 8311 and the second seat body 8312 are provided with arc holes on the side walls facing the installation shaft 822. The two arc holes cooperate to form a connecting hole sleeved on the installation shaft 822. In order to facilitate the positioning of the first seat body 8311 and the second seat body 8312 during installation, and to facilitate the arrangement of the arc plate 832, the two ends of the long side direction of the first seat body 8311 are provided with first limiting bosses 83111 facing the second seat body 8312, and the second seat body 8312 is provided with limiting grooves 83121 corresponding to the first seat body 8311. The side wall of the first seat body 8311 is circumferentially connected with three arc plates 832, and the side wall of the second seat body 8312 is circumferentially connected with an arc plate 832. The first seat body 8311 and the second seat body 8312 are fixedly connected by screws.

[0077] Furthermore, in order to facilitate the cleaning of the two axial side walls of the anaerobic tank 3, that is, to clean the side walls of the first plate body 11 and the second plate body 12 located in the anaerobic tank 3, the cleaning device 8 also includes two second brush head assemblies 84, and each of the side walls of the two first plate bodies 11 arranged back to back in the first direction X is connected to a second brush head assembly 84, one second brush head assembly 84 is used to scrub the side walls of the first plate body 11, and the other second brush head assembly 84 is used to scrub the side walls of the second plate body 12.

[0078] Specifically, in order to ensure the cleaning effect, the bristles on the second brush head assembly 84 always abut against the side wall to be cleaned, so the second brush head assembly 84 includes a connecting plate 841 and two second springs 842, wherein the two ends of the connecting plate 841 are respectively sleeved on a mounting shaft 822, and the circumferential end surface of the connecting plate 841 away from the mounting shaft 822 is evenly distributed with bristles a, and the second spring 842 is sleeved on the mounting shaft 822, and one end of the second spring 842 abuts against the mounting plate 821, and the other end abuts against the connecting plate 841, and the second spring 842 has a movement tendency to push the connecting plate 841 away from the mounting shaft 822. Due to the existence of the second spring 842, the bristles on the connecting plate 841 always abut against the side wall to be cleaned, thereby improving the cleaning efficiency.

[0079] In some embodiments, in order to facilitate the adjustment of the size of the air collecting hood 6 according to the actual situation of the anaerobic reaction and change the air collection volume of the air collecting hood 6, a driving component 9 is also included. The air collecting hood 6 includes a first cover body 61, a second cover body 62 and a telescopic cover 64. The first cover body 61 and the second cover body 62 are arranged relatively to each other in the second direction Y. One end of the telescopic cover 64 is connected to the first cover body 61, and the other end is connected to the second cover body 62. The output end of the driving component 9 is respectively connected to the first cover body 61 and the second cover body 62 for transmission. The driving component 9 can drive the first cover body 61 and the second cover body 62 to move toward or away from each other along the second direction Y to extend or contract the telescopic cover 64.

[0080] Furthermore, in order to facilitate the design of the driving assembly 9 and to facilitate synchronously driving the first cover body 61 and the second cover body 62 to move toward or away from each other in the second direction Y, refer to Fig.12 The driving assembly 9 includes a servo motor 91 and a driving gear 92. The first cover body 61 and the second cover body 62 are relatively connected to the limiting seat 63 in the first direction X. Specifically, the servo motor 91 is arranged outside the tank body 1, and the output end extends into the anaerobic tank 3 and is detachably connected to the driving gear 92; at the same time, in order to facilitate the limiting of the first cover body 61 and the second cover body 62 in the third direction Z, the side walls of the two first limiting seats 63 that are relatively arranged are provided with U-shaped limiting grooves 631 along the second direction Y, and the side walls of the U-shaped limiting grooves 631 facing the driving gear 92 are provided with tooth-shaped portions 632 along the second direction Y, and the driving gear 92 is clamped in the two U-shaped limiting grooves 631 and meshed with the tooth-shaped portions 632. The servo motor 91 drives the driving gear 92 to rotate, so as to realize the first cover body 61 and the second cover body 62 to move toward or away from each other in the second direction Y.

[0081] Furthermore, in order to facilitate the limiting of the first cover body 61 and the second cover body 62 in the first direction X, the driving assembly 9 also includes four guide rods 93. The cross-section of the guide rod 93 in the radial direction is rectangular. The top of the guide rod 93 is fixed to the tank body 1. The four guide rods 93 are arranged in pairs in the first direction X and the second direction Y. A guide hole 633 corresponding to the guide rod 93 is opened on the limiting seat 63. The long side direction of the guide hole 633 is arranged along the second direction Y. The guide rod 93 passes through the guide hole 633. The bottom of the guide rod 93 is provided with a second limiting boss 931, which can prevent the gas collecting hood 6 from falling off from the installation position as a whole.

[0082] Furthermore, in order to facilitate the guiding and limiting of the first cover body 61 and the second cover body 62 when they move in the second direction Y, and at the same time, to ensure a certain structural strength between the first cover body 61 and the second cover body 62, a slide groove 611 is provided on one end face of the first cover body 61 facing the second cover body 62 along the second direction Y, and the second cover body 62 is provided with a guide boss 621 corresponding to the slide groove 611, and the guide boss 621 is inserted in the slide groove 611. In order to prevent impurities from entering the gap between the guide boss 621 and the slide groove 611 and causing jamming, the telescopic cover 64 is sleeved on the outside of the guide boss 621, and one end of the telescopic cover 64 is connected to the first cover body 61, and the other end is connected to the second cover body 62. The structure of the telescopic cover 64 is similar to the bellows 836 and can be extended or contracted.

[0083] Furthermore, in order to facilitate the discharge of biogas and collect it at the same time, an exhaust port 600 is provided on the top of the first cover body 61 and / or the second cover body 62. Since the positional relationship between the first cover body 61 and the second cover body 62 can change, the exhaust duct includes a flexible hose (not shown in the figure), and the exhaust port 600 is connected to the flexible hose. An exhaust channel 32 corresponding to the flexible hose is provided on the top of the tank body 1. The exhaust channel 32 is connected to the gas storage tank (not shown in the figure), and the exhaust channel 32 is provided with a pressure regulating valve (not shown in the figure). The pressure regulating valve can be set to a certain opening pressure value. When the air pressure in the air collecting hood 6 increases to the opening pressure value, the pressure regulating valve opens. At this time, the exhaust channel 32 is connected to the gas storage tank, and a large amount of air is discharged from the inside of the air collecting hood 6.

[0084] Furthermore, after the anaerobic reaction occurs in the anaerobic tank 3, sludge is easily accumulated at the bottom of the anaerobic tank 3. In order to facilitate sewage discharge, a sewage pipe 31 is provided at the bottom of the anaerobic tank 3. In order to avoid blockage at the sewage pipe 31, in this embodiment, the present invention also includes a sewage discharge device 10. Specifically, the sewage discharge device 10 includes a driving motor 100, a stirring shaft 101, a spiral blade 102, a valve 103, and a suction pump 104; wherein, referring to Fig.14The sewage pipe 31 includes a first pipe section 311 and a second pipe section 312. The first pipe section 311 is arranged along the third direction Z, and the second pipe section 312 is arranged along the first direction X. One axial end of the first pipe section 311 is connected to the anaerobic tank 3, and a driving motor 100 is fixedly arranged on the outer wall of the other end. The output end of the driving motor 100 extends into the first pipe section 311 and is connected to a stirring shaft 101. The stirring shaft 101 is coaxially arranged with the first pipe section 311, and the stirring shaft 101 is connected to a spiral blade 102. One end of the second pipe section 312 is connected to the side wall of the first pipe section 311, and a sewage outlet 3121 is arranged at the other end. The first pipe section 311 is provided with a valve 103 and a suction pump 104 spaced apart in the first direction X near the sewage outlet 3121. When sewage needs to be discharged, the drive motor 100 works to drive the spiral blade 102 to rotate, so that the sludge entering the first pipe section 311 becomes fluffy to avoid blockage in the first pipe section 311. At this time, the suction pump 104 and the valve 103 are opened to discharge the sludge in the anaerobic tank 3 to improve sewage discharge efficiency.

[0085] The present invention also provides a method for enhanced anaerobic treatment of rural domestic sewage, and the enhanced anaerobic treatment equipment for rural domestic sewage based on any of the above items comprises the following steps:

[0086] S1. Treat the inflow and quality of sewage;

[0087] S2, the sewage undergoes anaerobic reaction to produce biogas and stirs the sludge;

[0088] S3. Collect biogas and conduct secondary clarification of wastewater after anaerobic reaction.

[0089] Among them, in step S1, the water inflow and water quality of the sewage are adjusted by the regulating tank 2. In step S2, the sludge at the bottom of the anaerobic tank 3 is stirred by the first pipe 5 and the cyclone device 7 to improve the mass transfer efficiency between the sewage and the sludge. In step S3, the biogas is stored through the exhaust pipe and the gas storage tank, and the clear water tank 4 performs secondary clarification on the sewage after the anaerobic reaction.

[0090] In summary, the embodiment of the present invention provides a rural domestic sewage enhanced anaerobic treatment equipment and method, which is provided with a first pipe 5, the first pipe 5 extends into the anaerobic tank 3, the first pipe 5 is provided with a first inlet and a first outlet, the first outlet is arranged toward the bottom of the anaerobic tank 3, and a gas collecting hood 6 is arranged, the biogas generated in the anaerobic tank 3 is at the top of the gas collecting hood 6, when the accumulated biogas reaches a certain volume, the exhaust pipe is connected to the gas storage tank, the gas in the gas collecting hood 6 is discharged in large quantities, and the biogas is stored in the gas storage tank for easy use. At this time, the liquid level in the anaerobic tank 3 drops rapidly, and under the action of the liquid level difference, the sewage enters the anaerobic tank 3 from the first pipe 5, and the bottom of the anaerobic tank 3 is impacted and stirred, so that the sludge and sewage are mixed, and the mass transfer efficiency between the sludge and the sewage is improved. At the same time, a clear water tank 4 is arranged to store the sewage after anaerobic treatment, so that water resources can be reused.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rural domestic sewage enhanced anaerobic treatment equipment, characterized by: It comprises a tank body, wherein a first plate body and a second plate body are arranged in a first direction in the tank body, and the first plate body and the second plate body separate the inside of the tank body into a regulating tank, an anaerobic tank, and a clear water tank; The regulating tank is used to regulate the inflow of sewage and balance the water quality, and the regulating tank is provided with a water inlet; A first pipe is provided at the bottom of the first plate body along the first direction, the first pipe extends into the anaerobic tank, and the first pipe is provided with a first inlet and a first outlet; the first inlet is provided in the regulating tank, the first outlet is provided in the anaerobic tank, and the first outlet is provided toward the bottom of the anaerobic tank; a water hole is provided at the top of the second plate body to connect the anaerobic tank with the clean water tank; The anaerobic tank is used for anaerobic reaction of sewage. The anaerobic tank is provided with an air collecting hood between the water hole and the first pipe. The air collecting hood is provided with an exhaust pipe connected to the gas storage tank outside the tank body. The gas storage tank is used to store biogas after anaerobic reaction of sewage. The sewage flows into the regulating tank through the water inlet and enters the anaerobic tank through the first pipe, and the sludge at the bottom of the anaerobic tank is impacted and stirred. The sewage enters the clean water tank through the water hole after anaerobic reaction and is stored in the clean water tank. The clean water tank is provided with a water outlet. It also includes a cleaning device, which includes a sealing cover, a forward and reverse motor, a mounting frame, and a first brush head assembly. The sealing cover is arranged in the clean water tank and fixed to the second plate body. The forward and reverse motor is installed in the sealing cover, and the output end passes through the second plate body and extends into the anaerobic tank. The mounting frame and the first brush head assembly are arranged in the anaerobic tank. One end of the mounting frame is connected to the output end of the forward and reverse motor, and the other end is rotatably connected to the first plate body. The mounting frame is provided with the first brush head assembly on both sides of the tank body in the radial direction, which is used to scrub the side wall of the regulating tank; The mounting frame comprises two mounting plates and two mounting shafts, the two mounting plates are spaced apart along the first direction, both ends of the two mounting plates are connected to one mounting shaft, and the first brush head assembly is connected to the mounting shaft; The first brush head assembly includes a connecting seat, a plurality of arc-shaped plates, and a plurality of first springs. The connecting seat is sleeved on the mounting shaft and is rotatably connected to the mounting shaft. The outer wall of the connecting seat is circumferentially provided with the arc-shaped plate, the inner wall of the arc-shaped plate is radially connected with a connecting rod, the outer wall of the arc-shaped plate is evenly distributed with bristles, a countersunk hole is provided on the connecting seat, the other end of the connecting rod is inserted into the countersunk hole, and a fixing screw is connected to the end thereof, the connecting rod can slide axially along the countersunk hole, the connecting rod is sleeved with the first spring, one end of the first spring is against the inner wall of the arc-shaped plate, and the other end is against the connecting seat, and the first spring has a tendency to push the arc-shaped plate to approach the side wall of the anaerobic tank.

2. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 1, characterized in that: It also includes a swirl device, which includes a first pump body and a nozzle. The first pipeline includes a first branch pipe and a second branch pipe. The first branch pipe is arranged along the first direction, and one end is arranged at the first inlet, and the other end is connected to the second branch pipe. The second branch pipe is arranged along the third direction and the first outlet is arranged at the bottom. The first pump body is installed on the first branch pipe, the top of the second branch pipe is closed, and the nozzles are evenly distributed on the side wall circumferentially.

3. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 1, characterized in that: A sealing cover is provided at one end of the countersunk hole facing the mounting shaft, and a bellows is provided at the first spring outer sleeve. One end of the bellows is connected to the arc plate, and the other end is connected to the connecting seat.

4. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 3, characterized in that: The connecting seat includes a first seat body and a second seat body, and the first seat body and the second seat body are provided with arc-shaped holes on the side walls facing the installation shaft, and the two arc-shaped holes cooperate to form a connecting hole sleeved on the installation shaft, and the first seat body is provided with a first limiting boss at both ends in the long side direction facing the second seat body, and the second seat body is provided with a limiting groove corresponding to the first limiting boss, the side wall of the first seat body is circumferentially connected to three of the arc-shaped plates, and the side wall of the second seat body is circumferentially connected to one of the arc-shaped plates, and the first seat body and the second seat body are fixedly connected by screws.

5. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 4, characterized in that: The cleaning device also includes two second brush head assemblies, and each of the side walls of the two first plates that are arranged opposite to each other in the first direction is connected to a second brush head assembly. One of the second brush head assemblies is used to clean the side walls of the first plate, and the other second brush head assembly is used to clean the side walls of the second plate.

6. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 5, characterized in that: The second brush head assembly includes a connecting plate and two second springs, both ends of the connecting plate are respectively sleeved on one of the mounting shafts, the circumferential end surface of the connecting plate away from the mounting shaft is evenly distributed with bristles, the second spring is sleeved on the mounting shaft, one end of the second spring is against the mounting plate, and the other end is against the connecting plate, and the second spring has a tendency to push the connecting plate away from the mounting shaft.

7. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 1, characterized in that: It also includes a driving component, and the air collecting hood includes a first hood body, a second hood body and a telescopic hood. The first hood body and the second hood body are arranged opposite to each other in a second direction. One end of the telescopic hood is connected to the first hood body, and the other end is connected to the second hood body. The output end of the driving component is respectively connected to the first hood body and the second hood body in a transmission manner. The driving component can drive the first hood body and the second hood body to move toward or away from each other along the second direction to extend or contract the telescopic hood.

8. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 7, characterized in that: The driving assembly includes a servo motor and a driving gear; the first cover body and the second cover body are relatively connected to a limited seat in the first direction; The servo motor is arranged outside the tank, and the output end thereof extends into the anaerobic tank and is detachably connected to the driving gear; The side walls of the two limiting seats arranged opposite to each other are provided with U-shaped limiting grooves along the second direction, and the side walls of the U-shaped limiting grooves facing the driving gear are provided with toothed portions along the second direction. The driving gear is clamped in the two U-shaped limiting grooves and meshes with the toothed portions.

9. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 8, characterized in that: The driving assembly also includes four guide rods, the cross-section of the guide rods in the radial direction is rectangular, the top of the guide rods is fixed to the tank body, the four guide rods are arranged in pairs in the first direction and the second direction, the limit seat is provided with guide holes corresponding to the guide rods, the long side direction of the guide holes is arranged along the second direction, the guide rods pass through the guide holes, and a second limit boss is provided at the bottom.

10. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 9, characterized in that: A slide groove is formed on one end surface of the first cover body toward the second cover body along the second direction. The second cover body is arranged on a guide boss corresponding to the slide groove. The guide boss is inserted into the slide groove, and the telescopic cover is sleeved outside the guide boss.

11. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 7, characterized in that: An exhaust port is provided at the top of the first cover body and / or the second cover body, the exhaust duct includes a flexible hose, the exhaust port is connected to the flexible hose, an exhaust channel corresponding to the flexible hose is provided at the top of the tank body, the exhaust channel is connected to the gas storage tank, and the exhaust channel is provided with a pressure regulating valve.

12. The enhanced anaerobic treatment equipment for rural domestic sewage according to claim 1, characterized in that: It also includes a sewage discharge device, a sewage discharge pipe is provided at the bottom of the anaerobic tank, and the sewage discharge device includes a driving motor, a stirring shaft, a spiral blade, a valve, and a suction pump; The sewage pipe includes a first pipe section and a second pipe section, the first pipe section is arranged along the third direction, and the second pipe section is arranged along the first direction; one axial end of the first pipe section is connected to the anaerobic tank, and the outer wall of the other end is fixedly provided with the driving motor, the output end of the driving motor extends into the first pipe section and is connected to a stirring shaft, the stirring shaft is coaxially arranged with the first pipe section, and the stirring shaft is connected to the spiral blade, one end of the second pipe section is connected to the side wall of the first pipe section, and the other end is provided with a sewage outlet, and the first pipe section is provided with the valve and the suction pump spaced apart in the first direction near the sewage outlet.

13. A method for enhanced anaerobic treatment of rural domestic sewage, based on the enhanced anaerobic treatment equipment for rural domestic sewage according to any one of claims 1 to 12, characterized in that: The following steps are involved: S1. Treat the inflow and quality of sewage; S2, the sewage undergoes anaerobic reaction to produce biogas and stirs the sludge; S3, collecting the biogas and performing secondary clarification on the sewage after the anaerobic reaction.

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