Sewage treatment and reuse equipment and method

Abstract

The invention relates to the field of sewage treatment, in particular to sewage treatment and recycling equipment and method.The sewage treatment and recycling equipment comprises a tank body, a sewage purification mechanism is arranged in the tank body and comprises a first-stage filtering assembly and a second-stage filtering assembly, the first-stage filtering assembly comprises a filtering net and a rotating shaft used for driving the filtering net to rotate, and the second-stage filtering assembly comprises a second-stage filtering assembly; the secondary filtering assembly comprises a microbial film ring plate fixedly connected with the tank body and a stirring structure arranged on the rotating shaft, and a return pipe used for guiding filtered water at the bottom of the tank body into the secondary filtering assembly again is connected between the bottom and the top of the tank body. Large-particle impurities and suspended solids are firstly removed through the filter screen, then sewage flows onto the microbial film ring plate and is matched with the stirring structure on the rotating shaft, so that the sewage is uniformly distributed and fully contacts with microorganisms, and the filtered water is re-pumped onto the microbial film ring plate through the return pipe to form a circulating filtration state; the safety and the quality of the recycled water are improved.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a sewage treatment and reuse device and method. Background Art

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or reuse. In addition to physical filtration, which uses fine holes such as screens for filtration and screening, membrane purification is also a common wastewater treatment method. The biofilm method is a method of treating organic wastewater using microorganisms that grow on the surface of certain solid objects. However, there is currently no device on the market that can use two treatment methods at the same time. A large number of devices are required to achieve this, which is costly.

[0003] The currently disclosed Chinese patent CN216472719U is a sewage treatment device combining physical filtration with membrane purification treatment, including a body, wherein a filter chamber and a purification chamber are respectively arranged on the upper and lower sides of the body, a water outlet and a water inlet are respectively arranged on the upper and lower ends of the body, a filter screen is arranged in the filter chamber, and the filter screen is truncated, a motor is fixedly installed at the right end of the body, a second rotating shaft is vertically inserted through a bearing at the center position of the filter screen, and a connecting block is installed at the upper end of the second rotating shaft through a telescopic mechanism, and brush rods are symmetrically welded at the left and right ends of the connecting block, and the bristles at the lower end of the brush rod are connected to the brush rod. The upper surface of the filter screen is fitted together, a push block is provided at the lower end of the brush rod, a slag discharge port is provided at the left end of the body, and the lower wall of the slag discharge port is flush with the edge upper wall of the filter screen, the lower end of the filter bin is bucket-shaped, a fourth bevel tooth is provided at the center position of the lower end of the filter bin, and a connecting pipe is inserted through the bearing at the lower end opening of the fourth bevel tooth, the output end of the motor is connected to the second rotating shaft and the connecting pipe through a transmission mechanism, a diverter seat is fixedly installed at the lower end of the connecting pipe, and four groups of diverter pipes are inserted on the diverter seat, a nozzle is fixedly installed at the end of the diverter pipe, and a microbial membrane ring plate is welded in a stepped manner on the lower surface of the purification bin.

[0004] According to the above patent, the above patent physically filters the sewage through a filter to remove impurities in the sewage, and then the physically treated sewage can be sprinkled onto the uppermost microbial membrane ring plate using a nozzle, so that the sewage can fall along the microbial membrane ring plate in a step-by-step manner, and be filtered by the microbial membrane attached to the surface of the microbial membrane ring plate during the falling process to achieve membrane purification treatment. Although the sewage falls along the microbial membrane ring plate in a step-by-step manner, the contact time with the microorganisms may be short, especially when the flow rate is large, the degradation effect of the microorganisms on organic matter may not be sufficient. Therefore, there is a need for a treatment and reuse equipment that fully purifies sewage to ensure the safety and quality of the recycled water. Summary of the invention

[0005] In view of the problems existing in the existing technology, a sewage treatment and reuse equipment is provided. The present invention first removes large particle impurities and suspended matter through a filter screen, and then the sewage flows to the microbial membrane ring plate and cooperates with the stirring structure on the rotating shaft to make the sewage evenly distributed and fully contact the microorganisms, and the filtered water is pumped back to the microbial membrane ring plate through a reflux pipe to form a circulating filtration state, thereby improving the safety and quality of the reused water.

[0006] To solve the problems of the prior art, the present invention provides a sewage treatment and reuse equipment, comprising a tank body with a water inlet and a water outlet, wherein a sewage purification mechanism is arranged inside the tank body, the sewage purification mechanism comprises a primary filter assembly located at the upper half of the tank body and a secondary filter assembly located at the lower half of the tank body, the primary filter assembly comprises a filter screen and a rotating shaft for driving the filter screen to rotate, the tank body is provided with a rotating driver for driving the rotating shaft to rotate, the secondary filter assembly comprises a microbial membrane ring plate fixedly connected to the tank body and a stirring structure arranged on the rotating shaft for following the rotation of the rotating shaft to fully distribute the sewage on the microbial membrane ring plate, the filter screen is a positive cone structure, the microbial membrane ring plate is an inverted cone structure, a reflux pipe for guiding the filtered water at the bottom of the tank body to the secondary filter assembly again is connected between the bottom and the top of the tank body, the reflux pipe has a water pump for providing water flow power, and when the reflux pipe redirects the filtered water to the secondary filter assembly, the sewage is in a circulating filtered state.

[0007] Preferably, the first-stage filtration component also includes an inverted conical landslide arranged directly below the filter screen and fixedly connected to the tank body, a positive conical landslide is fixedly provided on the rotating shaft and below the inverted conical landslide for guiding the sewage to flow toward the microbial membrane ring plate, a gap is left between the inverted conical landslide and the positive conical landslide for the sewage to fall, a dosing port for injecting a purifier is provided on the tank body and between the filter screen and the inverted conical landslide, and a purification cavity for mixing sewage and the agent is formed between the filter screen and the inverted conical landslide.

[0008] Preferably, a stirring frame located in the purification cavity is fixedly provided on the rotating shaft, the stirring frame having an upper surface parallel to the filter screen and a lower surface parallel to the inverted cone landslide, a blocking structure capable of preventing clean water from flowing downward is provided between the stirring frame and the filter screen, when the blocking structure blocks the lower ends of the stirring frame and the filter screen, a backwashing space is formed between the upper surface of the stirring frame and the filter screen, a flow channel is provided on the rotating shaft from its upper end downward, a backwashing nozzle for clean water to be discharged therein is provided on the rotating shaft at a position corresponding to the backwashing space, and a water filling port for introducing clean water into the flow channel is provided on the top of the tank body.

[0009] Preferably, the upper surface of the inverted conical landslide is provided with a plurality of protrusions around its circumferential direction for slowing down the downstream speed of sewage, the lower surface of the stirring frame is provided with stirring bars for uniformly mixing sewage and purifier on the inverted conical landslide, and a reflux nozzle for filtered water to flow into the microbial membrane ring plate again is provided on the rotating shaft at a position corresponding to the position between the inverted conical landslide and the positive conical landslide, the flow channel on the rotating shaft is also connected to the reflux pipe, and the reflux nozzle and the backwash nozzle are both provided with solenoid valves.

[0010] Preferably, there is a closed space between the stirring frame and the rotating shaft, in which a heating coil is provided, and a flow guide tube is provided in the flow channel of the rotating shaft for passing a heating medium into the closed space for heating by the heating coil. When the stirring frame is heated, the sewage is in a heated state, so that the viscosity of the sewage is reduced and the sewage is in full contact with the purifier.

[0011] Preferably, a sealing gasket is fixedly provided on the tank body and contacts the lower end of the filter to prevent sewage from flowing out of the gap between the filter and the tank body. An external discharge port for backwashing water to flow out is opened on the tank body and directly opposite the lower end of the filter.

[0012] Preferably, the microbial membrane ring plate is composed of a plurality of inverted conical plate bodies which gradually descend from top to bottom to form a stepped support platform, and a microbial membrane is attached to the surface of each of the plate bodies.

[0013] Preferably, a positive cone plate body is provided between each two adjacent inverted cone plates on the positive cone landslide to prevent sewage from directly splashing on the bottom of the tank body.

[0014] Preferably, a stirring rod is extended from each positive cone plate body along the direction of the surface of the corresponding inverted cone plate body, and all the stirring rods constitute the stirring structure.

[0015] The present invention also provides a sewage treatment and reuse method, comprising the following steps: S1. Start the rotating shaft to drive the filter to rotate and fully contact the sewage to remove large particles of impurities and suspended matter; S2. The initially filtered sewage enters the microbial membrane ring plate to further decompose the harmful substances in the sewage; S3, the stirring structure rotates with the shaft to evenly distribute the sewage on the microbial membrane ring plate; S4, the reflux pipe pumps the filtered water at the bottom of the tank back to the microbial membrane ring plate to form a circulating filtration state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention effectively removes large particles of impurities and suspended solids by rotating the positive cone filter under the drive of the rotary driver, ensuring preliminary purification. Subsequently, the sewage flows into the inverted cone microbial membrane ring plate in the lower half of the tank. The microbial membrane ring plate carries a large number of microbial communities that decompose organic matter, and cooperates with the stirring structure on the rotating shaft to make the sewage evenly distributed and fully contact the microorganisms, thereby improving the decomposition efficiency of organic pollutants.

[0017] As the reflux pipe pumps the filtered water at the bottom back to the microbial membrane ring plate, a circulating filtration state is formed, ensuring that pollutants that are difficult to remove at one time are treated multiple times, greatly improving the purification effect.

[0018] 2. After the initial filtration through the filter screen, the present invention falls into the inverted cone landslide and is fully mixed with the purifier added from the dosing port in the purification cavity to further remove impurities. By combining the filter screen treatment with the agent treatment, it is ensured that the sewage has completed an efficient initial purification treatment before entering the secondary filtration, which significantly improves the overall purification effect and the efficiency of subsequent treatment.

[0019] 3. The present invention forms a backwashing space between the filter and the stirring frame through the blocking structure when cleaning the filter, ensuring that the clean water body thoroughly cleans the filter from the inside out with high-pressure water flow, effectively removing impurities and blockages on the filter. Regular and effective backwashing can reduce filter blockage, extend the service life of the entire filter, and improve the filtering effect.

[0020] 4. The present invention uses a microbial membrane ring plate composed of multiple inverted cone plates, which gradually decrease from top to bottom to form a stepped support platform, so that sewage has a longer path and more residence time when flowing through each inverted cone plate, increasing the contact area with the microbial membrane and significantly improving the degradation efficiency of pollutants.

[0021] With the blocking of sewage by the positive cone plate between every two adjacent inverted cone plates, the sewage is prevented from splashing directly to the bottom of the tank, ensuring that the sewage flows step by step along the predetermined path and fully contacts the microbial membrane. The stirring rod effectively stirs the water flow to ensure that the sewage fully contacts the microbial membrane, further improving the metabolic efficiency of the microorganisms and the effect of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top-oriented three-dimensional structural schematic diagram of a sewage treatment and reuse device.

[0023] Figure 2 It is a schematic diagram of the bottom-oriented three-dimensional structure of a sewage treatment and reuse device.

[0024] Figure 3 It is a partial three-dimensional structural cross-sectional view of a sewage treatment and reuse device.

[0025] Figure 4 It is a plan cross-sectional view of a sewage treatment and reuse equipment.

[0026] Figure 5 This is an enlarged schematic diagram of point A.

[0027] Figure 6 This is an enlarged schematic diagram of point B.

[0028] Figure 7 This is an enlarged schematic diagram of point C.

[0029] Figure 8 The present invention is a schematic diagram of the state in which the blocking structure of a sewage treatment and reuse equipment closes the gap between the stirring frame and the lower end of the filter screen.

[0030] Fig. 9 The present invention is a schematic diagram of the state in which the gap between the stirring frame and the lower end of the filter screen is opened in the closed structure of the sewage treatment and reuse equipment.

[0031] Fig.10 The present invention is a partial three-dimensional structural cross-sectional view of a microbial membrane ring plate of a sewage treatment and reuse equipment.

[0032] The numbers in the figure are: 1-tank body; 11-water inlet; 12-water outlet; 13-dosing port; 14-water filling port; 15-external discharge port; 2-primary filter assembly; 21-filter screen; 211-backwash space; 212-sealing gasket; 22-rotating shaft; 221-flow channel; 2211-backwash nozzle; 2212-reflux nozzle; 23-inverted cone landslide; 231-bump; 24-positive cone landslide; 3-secondary filter assembly; 31-microorganism ring plate; 311-inverted cone plate body; 32-stirring structure; 321-positive cone plate body; 322-stirring rod; 4-reflux pipe; 5-stirring frame; 51-stirring bar; 52-heating coil; 53-guide pipe; 6-blocking structure; 61-ring body; 62-push rod; 63-spring. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] See also Figure 1-Figure 4As shown, a sewage treatment and reuse device includes a tank body 1 with a water inlet 11 and a water outlet 12, a sewage purification mechanism is arranged inside the tank body 1, and the sewage purification mechanism includes a primary filter assembly 2 located in the upper half of the tank body 1 and a secondary filter assembly 3 located in the lower half of the tank body 1, the primary filter assembly 2 includes a filter screen 21 and a rotating shaft 22 for driving the filter screen 21 to rotate, the tank body 1 is provided with a rotating driver for driving the rotating shaft 22 to rotate, and the secondary filter assembly 3 includes a microorganism fixedly connected to the tank body 1 The membrane ring plate and the stirring structure 32 arranged on the rotating shaft 22 are used to rotate with the rotating shaft 22 to fully distribute the sewage on the microbial membrane ring plate. The filter screen 21 is a positive cone structure, and the microbial membrane ring plate is an inverted cone structure. The bottom and the top of the tank body 1 are connected with a return pipe 4 for guiding the filtered water at the bottom of the tank body 1 to the secondary filter component 3 again. The return pipe 4 has a water pump for providing water flow power. When the return pipe 4 redirects the filtered water to the secondary filter component 3, the sewage is in a circulating filtration state.

[0035] When sewage is treated, the sewage first enters the tank body 1 through the water inlet 11 of the tank body 1, and the sewage directly contacts the primary filter assembly 2 located in the upper half of the tank body 1. As the rotating shaft 22 is rotated by the rotary drive, the filter screen 21 is driven to rotate, so that the sewage contacts the filter screen 21 more fully, further improving the filtering effect.

[0036] After the sewage passes through the primary filter component 2, most of the suspended solids have been effectively removed, and the next step is the more sophisticated secondary filtration link. At this time, the sewage flows into the secondary filter component 3 in the lower half of the tank body 1, that is, it falls on the microbial membrane ring plate. The microbial membrane ring plate carries a large number of microbial communities that can decompose organic matter. These microorganisms can convert harmful substances in the sewage into harmless substances, thereby achieving the purpose of purifying water quality. In order to ensure that the sewage can fully contact the microbial membrane ring plate. The stirring structure 32 rotates with the rotating shaft 22, effectively breaking up the sewage and evenly distributing it on the microbial membrane ring plate, so that the microorganisms have more opportunities to contact the pollutants in the sewage, thereby improving the purification efficiency.

[0037] In this process, the reflux pipe 4 allows the sewage to have a chance to return to the microbial membrane ring plate for repeated treatment. The filtered water at the bottom of the tank 1 is pumped back to the secondary filter assembly 3 by the water pump, which can not only remove impurities in the sewage more thoroughly, but also ensure that those pollutants that are difficult to remove at one time get more processing time. The sewage is in a state of circulating filtration, and the circulation mechanism ensures that every tiny pollutant has a chance to be filtered multiple times, greatly improving the overall purification effect.

[0038] See also Figure 3-Figure 5As shown, the primary filter assembly 2 also includes an inverted conical landslide 23 arranged directly below the filter screen 21 and fixedly connected to the tank body 1, a positive conical landslide 24 for guiding the sewage to flow toward the microbial membrane ring plate is fixedly provided on the rotating shaft 22 and below the inverted conical landslide 23, and a gap is left between the inverted conical landslide 23 and the positive conical landslide 24 for the sewage to fall, and a dosing port 13 for injecting a purifier is provided on the tank body 1 and between the filter screen 21 and the inverted conical landslide 23, and a purification cavity for mixing sewage and the agent is formed between the filter screen 21 and the inverted conical landslide 23.

[0039] After the sewage is initially filtered through the filter screen 21, it will fall onto the inverted cone-shaped landslide 23 located directly below the filter screen 21 and fixedly connected to the tank body 1. At this time, the dosing port 13 on the tank body 1 injects the purifier into the purification cavity between the filter screen 21 and the inverted cone-shaped landslide 23, so that the sewage and the agent are fully mixed, further improving the purification effect.

[0040] Subsequently, the sewage flows downward along the inverted cone landslide 23, passes through the gap between the inverted cone landslide 23 and the positive cone landslide 24, and finally flows toward the microbial membrane ring plate under the guidance of the positive cone landslide 24, and enters the secondary filtration link. This ensures that the sewage has been preliminarily purified and treated with chemicals before flowing into the microbial membrane ring plate, thereby improving the efficiency and effect of subsequent treatment.

[0041] See also Figure 3-Figure 6 , Figure 8 and Fig. 9 As shown, a stirring frame 5 located in the purification cavity is fixedly provided on the rotating shaft 22, and the stirring frame 5 has an upper surface parallel to the filter screen 21 and a lower surface parallel to the inverted cone landslide 23. A blocking structure 6 capable of preventing clean water from flowing down is provided between the stirring frame 5 and the filter screen 21. When the blocking structure 6 blocks the lower ends of the stirring frame 5 and the filter screen 21, a backwashing space 211 is formed between the upper surface of the stirring frame 5 and the filter screen 21. A flow channel 221 is provided on the rotating shaft 22 from its upper end downward, and a backwashing nozzle 2211 for clean water to be discharged therein is provided on the rotating shaft 22 and at a position corresponding to the backwashing space 211, and a water filling port 14 capable of introducing clean water into the flow channel 221 is provided on the top of the tank body 1.

[0042] The blocking structure 6 comprises a ring body 61 slidably mounted on the stirring frame body 5 and a push rod 62 for pushing the ring body 61 to move upward. The ring body 61 is a rubber structure. A spring 63 is connected between the ring body 61 and the stirring frame body 5. A pusher for driving the push rod 62 to move is provided on the outer side of the tank body 1. When the sewage flows normally, the spring 63 is in a compressed state. At this time, the gap between the ring body 61 and the filter screen 21 is opened to allow the sewage to flow down normally into the inverted cone landslide 23. When the filter screen 21 is backwashed, the pusher drives the push rod 62 to push the ring body 61 to move upward. At this time, the spring 63 is stretched until the ring body 61 contacts the filter screen 21, and a backwashing space 211 is formed between the filter screen 21 and the stirring frame body 5, so that clean water can be filled into the backwashing space 211, and the filter holes on the filter screen 21 are thoroughly washed from the inside out with high-pressure water. Since the ring body 61 is a rubber structure, the sealing between the ring body 61 and the filter screen 21 is ensured, and leakage is prevented during the high-pressure flushing process, thereby ensuring the effectiveness and pressure of the backwashing.

[0043] See also Figure 3-Figure 5 and Figure 7-Figure 9 As shown, the upper surface of the inverted conical landslide 23 is provided with a plurality of protrusions 231 around its circumferential direction for slowing down the downstream speed of sewage, the lower surface of the stirring frame 5 is provided with stirring bars 51 for uniformly mixing sewage and purifier on the inverted conical landslide 23, and a reflux nozzle 2212 for filtered water to flow into the microbial membrane ring plate again is provided on the rotating shaft 22 and at a position corresponding to the inverted conical landslide 23 and the positive conical landslide 24. The flow channel 221 on the rotating shaft 22 is also connected to the reflux pipe 4, and the reflux nozzle 2212 and the backwash nozzle 2211 are both provided with solenoid valves.

[0044] When sewage flows into the inverted cone-shaped landslide 23, a plurality of protrusions 231 arranged on its upper surface in a circumferential direction effectively slow down the downstream speed of the sewage and increase the residence time of the sewage in the purification cavity. At the same time, stirring bars 51 are arranged on the lower surface of the stirring frame 5. When the rotating shaft 22 rotates, these stirring bars 51 evenly mix the sewage and the purifier on the inverted cone-shaped landslide 23 to ensure that the two are fully in contact and react.

[0045] When the filtered water needs to be processed again, the solenoid valve controls the return nozzle 2212 to open, while the backwash nozzle 2211 is controlled to be closed, so that the filtered water flows back into the microbial membrane ring plate through the flow channel 221 on the rotating shaft 22 and the return pipe 4 for further processing.

[0046] When the filter screen 21 needs to be backwashed, the solenoid valve controls the backwash nozzle 2211 to open, while the return nozzle 2212 is controlled to be closed, so that clean water flows through the flow channel 221 on the rotating shaft 22 into the backwash space 211 formed between the filter screen 21 and the stirring frame 5 for backwashing treatment.

[0047] See also Figure 3 , Figure 4 and Figure 7-Figure 9 As shown, there is a closed space between the stirring frame 5 and the rotating shaft 22, in which a heating coil 52 is provided. A flow guide tube 53 is provided in the flow channel 221 of the rotating shaft 22 for passing a heating medium into the closed space for heating by the heating coil 52. When the stirring frame 5 is heated, the sewage is in a heated state, so that the viscosity of the sewage is reduced and the sewage is fully in contact with the purifier.

[0048] The heating medium can be liquid or gas. When the sewage flows in the purification cavity, the heating medium introduced into the stirring frame 5 by the guide pipe 53 controls the temperature through the heating coil 52. As the temperature of the heating coil 52 increases, the heat in the closed space is transferred to the stirring frame 5 through the heating medium, so that the stirring frame 5 is heated. In this process, the sewage is also indirectly heated when flowing on the inverted cone landslide 23, resulting in a decrease in its viscosity, thereby making it easier to fully mix and react with the purifier, and finally achieving the best contact effect between the sewage and the purifier.

[0049] See also Figure 3-Figure 5 As shown, a sealing gasket 212 is fixedly provided on the tank body 1 and contacts the lower end of the filter screen 21 to prevent sewage from flowing out of the gap between the filter screen 21 and the tank body 1. An external discharge port 15 for backwashing water to flow out is opened on the tank body 1 and at a position opposite to the filter screen 21.

[0050] When sewage enters the tank body 1 for filtration, the sealing gasket 212 between the lower end of the filter screen 21 and the tank body 1 is in close contact to prevent sewage from flowing out from the gap between the two, ensuring that all sewage is filtered through the filter screen 21. At the same time, an external discharge port 15 is opened on the tank body 1 opposite to the lower end of the filter screen 21. When backwashing is required, high-pressure water flows out from the external discharge port 15 after passing through the filter screen 21, taking away impurities and blockages on the surface of the filter screen 21, ensuring the cleanliness and efficient operation of the filter screen 21.

[0051] See also Figure 3 , Figure 4 and Fig.10 As shown, the microbial membrane ring plate is composed of a plurality of inverted cone-shaped plate bodies 311 which gradually descend from top to bottom to form a stepped support platform, and a microbial membrane is attached to the surface of each plate body.

[0052] Since the microbial membrane ring plate is composed of a plurality of inverted cone plates 311, and all the inverted cone plates 311 are arranged in a gradually decreasing manner from top to bottom to form a stepped support platform, the sewage has a longer path and more residence time when flowing through each inverted cone plate 311, increasing the contact area between the sewage and the microbial membrane, thereby improving the degradation efficiency of pollutants.

[0053] The microbial membrane on each plate can continuously and efficiently degrade organic matter and other pollutants. As the sewage flows step by step, the pollutants are gradually removed, ultimately achieving efficient sewage treatment results.

[0054] See also Figure 3 , Figure 4 and Fig.10 As shown, a positive cone plate 321 is provided between each two adjacent inverted cone plates 311 on the positive cone landslide 24 to prevent sewage from directly splashing on the bottom of the tank 1 .

[0055] When sewage flows between the inverted cone plates 311 of the microbial membrane ring plate, since a positive cone plate 321 is provided between every two adjacent inverted cone plates 311, the sewage is prevented from directly splashing onto the bottom of the tank body 1 during the flow, ensuring that the sewage can flow step by step along a predetermined path and fully contact the microbial membrane, so that the pollutants in the sewage can be more effectively degraded and treated, while avoiding the problems of uneven treatment and reduced efficiency caused by splashing.

[0056] See also Figure 3 , Figure 4 and Fig.10 As shown, a stirring rod 322 extends from each positive cone plate 321 along the direction of the surface of the corresponding inverted cone plate 311 , and all the stirring rods 322 constitute the stirring structure 32 .

[0057] When the sewage flows between the inverted cone plates 311 of the microbial membrane ring plate, a number of stirring rods 322 extend from each positive cone plate 321 along the direction of the surface of the corresponding inverted cone plate 311 to form a complete stirring structure 32. As the sewage flows through each inverted cone plate 311 step by step, the stirring rods 322 can effectively stir the water flow to ensure that the sewage is in full contact with the microbial membrane, prevent the deposition of pollutants, and promote the dissolution of oxygen, thereby improving the metabolic efficiency of microorganisms and the effect of sewage treatment.

[0058] A sewage treatment and reuse method, applied to a sewage treatment and reuse device, comprises the following steps: S1, start the rotating shaft 22 to drive the filter screen 21 to rotate and fully contact the sewage to remove large particles of impurities and suspended matter; S2. The initially filtered sewage enters the microbial membrane ring plate to further decompose the harmful substances in the sewage; S3, the stirring structure 32 rotates with the rotating shaft 22 to evenly distribute the sewage on the microbial membrane ring plate; S4, the reflux pipe 4 pumps the filtered water at the bottom of the tank 1 back to the microbial membrane ring plate to form a circulating filtration state.

[0059] The present invention effectively removes large particles of impurities and suspended matter by rotating the positive cone filter 21 driven by a rotary driver to ensure preliminary purification. Subsequently, the sewage flows into the inverted cone microbial membrane ring plate in the lower half of the tank body 1. The microbial membrane ring plate carries a large number of microbial communities that decompose organic matter. The stirring structure 32 on the rotating shaft 22 is used to evenly distribute the sewage and fully contact the microorganisms, thereby improving the decomposition efficiency of organic pollutants.

[0060] As the reflux pipe 4 pumps the filtered water at the bottom back to the microbial membrane ring plate, a circulating filtration state is formed, ensuring that pollutants that are difficult to remove at one time are treated multiple times, greatly improving the purification effect.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A sewage treatment and reuse device, comprising a tank body (1) having a water inlet (11) and a water outlet (12), wherein a sewage purification mechanism is provided inside the tank body (1); It is characterized in that The sewage purification mechanism comprises a primary filter assembly (2) located at the upper half of a tank body (1) and a secondary filter assembly (3) located at the lower half of the tank body (1), the primary filter assembly (2) comprising a filter screen (21) and a rotating shaft (22) for driving the filter screen (21) to rotate, the tank body (1) is provided with a rotating driver for driving the rotating shaft (22) to rotate, the secondary filter assembly (3) comprising a microbial membrane ring plate fixedly connected to the tank body (1) and a stirring structure (32) arranged on the rotating shaft (22) for rotating with the rotating shaft (22) to fully distribute the sewage on the microbial membrane ring plate; The filter screen (21) is a positive cone structure, and the microbial membrane ring plate is an inverted cone structure; A return pipe (4) is connected between the bottom and top of the tank body (1) for guiding filtered water from the bottom of the tank body (1) back to the secondary filter assembly (3). The return pipe (4) has a water pump for providing water flow power. When the return pipe (4) redirects the filtered water to the secondary filter assembly (3), the sewage is in a circulating filtered state.

2. A sewage treatment and reuse equipment according to claim 1, characterized in that: The primary filter assembly (2) further comprises an inverted conical landslide (23) arranged directly below the filter screen (21) and fixedly connected to the tank body (1); a positive conical landslide (24) is fixedly arranged on the rotating shaft (22) and located below the inverted conical landslide (23) for guiding the sewage to flow in the direction of the microbial membrane ring plate; a gap is left between the inverted conical landslide (23) and the positive conical landslide (24) for the sewage to fall; a dosing port (13) for injecting a purifying agent is provided on the tank body (1) and located between the filter screen (21) and the inverted conical landslide (23); and a purification cavity for mixing sewage and the agent is formed between the filter screen (21) and the inverted conical landslide (23).

3. A sewage treatment and reuse equipment according to claim 2, characterized in that: A stirring frame (5) located in the purification cavity is fixedly provided on the rotating shaft (22), the stirring frame (5) having an upper surface parallel to the filter screen (21) and a lower surface parallel to the inverted cone-shaped landslide (23), a blocking structure (6) capable of preventing clean water from flowing down is provided between the stirring frame (5) and the filter screen (21), when the blocking structure (6) blocks the lower ends of the stirring frame (5) and the filter screen (21), a backwashing space (211) is formed between the upper surface of the stirring frame (5) and the filter screen (21), a flow channel (221) is provided on the rotating shaft (22) from its upper end downward, a backwashing nozzle (2211) for clean water to be discharged therein is provided on the rotating shaft (22) and at a position corresponding to the backwashing space (211), and a water filling port (14) capable of introducing clean water into the flow channel (221) is provided on the top of the tank body (1).

4. A sewage treatment and reuse equipment according to claim 3, characterized in that: The upper surface of the inverted conical landslide (23) is provided with a plurality of protrusions (231) around its circumferential direction for slowing down the downward flow speed of sewage. The lower surface of the stirring frame (5) is provided with stirring bars (51) for uniformly mixing sewage and purifying agent on the inverted conical landslide (23). A reflux nozzle (2212) for allowing filtered water to flow into the microbial membrane ring plate again is provided on the rotating shaft (22) at a position corresponding to the position between the inverted conical landslide (23) and the positive conical landslide (24). The flow channel (221) on the rotating shaft (22) is also connected to the reflux pipe (4). The reflux nozzle (2212) and the backwash nozzle (2211) are both provided with electromagnetic valves.

5. The sewage treatment and reuse equipment according to claim 3 is characterized in that: A closed space is provided between the stirring frame (5) and the rotating shaft (22), wherein a heating coil (52) is provided in the closed space, and a flow guide tube (53) is provided in the flow channel (221) of the rotating shaft (22) for passing a heating medium into the closed space for heating by the heating coil (52). When the stirring frame (5) is heated, the sewage is in a heated state, so that the viscosity of the sewage is reduced and the sewage is in full contact with the purifier.

6. The sewage treatment and reuse equipment according to claim 3 is characterized in that: A sealing gasket (212) is fixedly provided on the tank body (1) and contacts the lower end of the filter screen (21) to prevent sewage from flowing out from the gap between the filter screen (21) and the tank body (1). An external discharge port (15) for backwashing water to flow out is provided on the tank body (1) at a position directly opposite to the lower end of the filter screen (21).

7. The sewage treatment and reuse equipment according to claim 1, characterized in that: The microbial membrane ring plate is composed of a plurality of inverted cone-shaped plate bodies (311) which gradually descend from top to bottom to form a stepped support platform, and a microbial membrane is attached to the surface of each plate body.

8. The sewage treatment and reuse equipment according to claim 7, characterized in that: A positive conical plate body (321) is provided between each two adjacent inverted conical plates (311) on the positive conical landslide (24) to prevent sewage from directly splashing onto the bottom of the tank body (1).

9. The sewage treatment and reuse equipment according to claim 8, characterized in that: A stirring rod (322) extends from each positive conical plate body (321) along the direction of the surface of the corresponding inverted conical plate body (311), and all the stirring rods (322) constitute the stirring structure (32).

10. A method for treating and reusing sewage, applied to a sewage treatment and reusing device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, starting the rotating shaft (22) to drive the filter (21) to rotate so as to fully contact the sewage and remove large particles of impurities and suspended matter; S2. The initially filtered sewage enters the microbial membrane ring plate to further decompose the harmful substances in the sewage; S3, the stirring structure (32) rotates with the rotating shaft (22) to evenly distribute the sewage on the microbial membrane ring plate; S4, the reflux pipe (4) pumps the filtered water at the bottom of the tank (1) back to the microbial membrane ring plate to form a circulating filtration state.

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