A segmented wastewater treatment device and treatment process

Abstract

The present invention relates to the field of wastewater treatment technology, and in particular to a segmented wastewater treatment device and treatment process, including a separation tank, a sedimentation tank and a biological treatment tank arranged in sequence, wherein the separation tank is provided with a separation component for separating oil and solid impurities in wastewater, a slag removal component for collecting and removing the separated solid impurities, and an oil discharge component for cleaning and discharging the separated oil, the separation tank and the sedimentation tank are provided with a wastewater lifting structure for sending the wastewater in the separation tank into the sedimentation tank, the sedimentation tank is provided with a sedimentation mechanism for precipitating solid impurities, the top of the sedimentation tank is provided with a connecting pipe connected to the biological treatment tank, and the biological treatment tank is provided with a biofilm treatment component. The present application helps to improve the separation effect of oil and solid impurities in wastewater, thereby improving the filtering treatment effect of wastewater, and further ensuring the subsequent treatment effect of wastewater.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a segmented wastewater treatment device and a treatment process. Background Art

[0002] Wastewater refers to the general term for water discharged during residents' activities and runoff rainwater, including domestic sewage, industrial wastewater, and other useless water such as initial rain runoff into drainage pipes. If it is discharged directly into the environment, it will have a serious impact on the ecological environment and human health.

[0003] Wastewater treatment refers to a series of physical, chemical, biological and other treatment processes to remove or transform impurities and harmful substances in wastewater so that it meets the discharge standards or water quality requirements for reuse. In the existing technology, the treatment process of wastewater usually requires multiple processes such as filtration, sedimentation, biological decomposition and disinfection.

[0004] When the wastewater passes through the screen, the larger solid impurities in the wastewater are intercepted, but the oil and some smaller solid impurities still remain in the wastewater. When filtering the wastewater that passes through the screen, the oil in the wastewater will be mixed with the filter residue of the solid impurities, which will easily make the filter residue of the solid impurities difficult to handle, and then easily lead to poor filtering treatment of the wastewater; therefore, in the process of filtering the wastewater, separation equipment is usually used to separate the oil in the wastewater first, but in the process of separating the oil and solid impurities, the solid impurities in the wastewater are easy to block the separation structure in the separation equipment, which is easy to lead to poor separation of the oil and solid impurities in the wastewater, and then easily cause the subsequent treatment effect of the wastewater to be affected. Summary of the invention

[0005] In order to improve the separation effect of oil and solid impurities in wastewater, thereby improving the filtering treatment effect of wastewater, and further helping to ensure the subsequent treatment effect of wastewater, the present application provides a segmented wastewater treatment device and treatment process.

[0006] The present application provides a segmented wastewater treatment device and treatment process, which adopts the following technical solutions:

[0007] A segmented wastewater treatment device comprises a separation tank, a sedimentation tank and a biological treatment tank which are arranged in sequence, wherein the separation tank is provided with a separation component for separating oil and solid impurities in wastewater, a slag removal component for collecting and removing the separated solid impurities and an oil discharge component for cleaning and discharging the separated oil, the separation tank and the sedimentation tank are provided with a wastewater lifting structure for conveying the wastewater in the separation tank into the sedimentation tank, the sedimentation tank is provided with a stirring sedimentation component for precipitating the solid impurities in the wastewater, the top of the sedimentation tank is provided with a connecting pipe for connecting with the biological treatment tank, and the biological treatment tank is provided with a biofilm treatment component for removing soluble organic matter and part of suspended matter in the wastewater.

[0008] By adopting the above technical scheme, when filtering wastewater, the wastewater is first passed into a separation tank, the separation component is used to separate the oil and solid impurities in the wastewater, the slag removal component is used to collect and remove the separated solid impurities, and the oil discharge component is used to clean and discharge the separated oil, which helps to improve the separation effect of oil and solid impurities in the wastewater, thereby improving the filtering treatment effect of the wastewater, and further ensuring the subsequent treatment effect of the wastewater.

[0009] In a specific feasible implementation scheme, the separation component includes a mounting seat, a guide cylinder, a primary filter screen and a secondary filter screen, the mounting seat is arranged on the inner wall of the separation tank, and the mounting seat divides the separation tank into an upper chamber and a lower chamber that are interconnected, the guide cylinder is fixedly connected to the mounting seat, the guide cylinder is arranged in a conical shape and is used to guide the oil in the lower chamber to float to the upper chamber, the primary filter screen is arranged at the bottom end of the guide cylinder, the secondary filter screen is arranged at the top end of the guide cylinder, and the primary filter screen and the secondary filter screen are both used to filter and intercept solid impurities.

[0010] By adopting the above technical solution, after the wastewater is passed into the separation tank, the oil in the wastewater passes through the primary filter and the secondary filter under the guidance of the mounting seat and the guide cylinder and floats to the interior of the upper chamber. At the same time, the solid impurities in the wastewater are still located in the lower chamber due to the interception effect of the primary filter and the secondary filter, so that the oil and solid impurities in the wastewater can be separated, which helps to improve the separation effect of the oil and solid impurities in the wastewater, thereby improving the filtering treatment effect of the wastewater, and further ensuring the subsequent treatment effect of the wastewater.

[0011] In a specific feasible implementation scheme, the oil drainage assembly includes a power motor, a rotating shaft, a floating plate and a plurality of oil scrapers, the power motor is arranged at the top of the separation tank, the rotating shaft is fixedly connected to the output shaft of the power motor, the rotating shaft is provided with a clamping groove along its length direction, the floating plate is sleeved on the rotating shaft and movably clamped in the clamping groove, a plurality of the oil scrapers are arranged at intervals on the circumferential side wall of the floating plate, an oil drainage opening for discharging oil pollution is opened on the top side wall of the separation tank, and an oil drainage pipe for connecting the oil drainage opening is provided on the side wall of the separation tank.

[0012] By adopting the above technical solution, a power motor is used to drive the floating plate and multiple scraper plates to rotate, so that the multiple scraper plates scrape the oil on the surface of the wastewater, and under the action of the rotating centrifugal force, the oil is sent into the oil discharge opening and discharged through the oil discharge pipe, thereby helping to discharge the oil separated from the wastewater in time.

[0013] In a specific possible implementation, a slow-release box for slowly releasing the water treatment agent into the separation tank is disposed on the outer wall of the separation tank, and a stirring paddle for stirring the wastewater is disposed at one end of the rotating shaft away from the power motor.

[0014] By adopting the above technical solution, the water treatment agent is slowly released into the separation tank using the slow-release box, which helps to cause the wastewater to break, and then helps to separate the oil from the wastewater and float to the surface of the wastewater, which helps to improve the separation effect of the oil in the wastewater. Using a power motor to drive the stirring paddle for stirring helps to improve the mixing effect of the water treatment agent and the wastewater, thereby ensuring the effect of the water treatment agent and further improving the separation effect of the oil in the wastewater.

[0015] In a specific feasible implementation mode, the slag removal assembly includes a slag collecting bucket, a slag extraction pipe and a slag extraction pump. The slag collecting bucket is arranged at the inner bottom end of the separation tank, the slag extraction pump is fixedly installed inside the slag collecting bucket, one end of the slag extraction pipe is fixedly connected to the slag extraction pump, and the end of the slag extraction pipe away from the slag extraction pump is arranged outside the separation tank.

[0016] By adopting the above technical scheme, the solid impurities inside the lower chamber are deposited in the slag collecting bucket under the action of gravity. The solid impurities deposited in the slag collecting bucket can be sucked and discharged by using a slag suction pump and a slag suction pipe, thereby helping to discharge the solid impurities deposited in the slag collecting bucket in time.

[0017] In a specific possible implementation scheme, a backwash pipe is provided at the position of the slag extraction pipe outside the separation tank, a pipeline valve is provided at one end of the backwash pipe close to the slag extraction pipe, and a backwash pump is provided at one end of the backwash pipe away from the slag extraction pipe.

[0018] By adopting the above technical solution, when the slag extraction pipe is blocked, the slag extraction pipe can be backwashed by using the backwash pump and the backwash pipe, which helps to improve the reliability of the slag extraction pipe when in use. The pipeline valve can prevent solid impurities from entering the backwash pump through the backwash pipe when the slag extraction pipe is sucking solid impurities, thereby protecting the backwash pump and helping to improve the reliability of the backwash pump when in use.

[0019] In a specific possible implementation mode, the stirring sedimentation assembly includes a stirring motor, a stirring shaft and multiple groups of stirring blades. The stirring motor is arranged at the top of the sedimentation tank, the stirring shaft is fixedly connected to the output shaft of the stirring motor, and multiple groups of stirring blades are connected to the stirring shaft. A plurality of connecting rods are arranged on the stirring shaft, and a scraper is arranged at one end of each connecting rod away from the stirring shaft, and the scraper is in conflict with the inner wall of the stirring tank.

[0020] By adopting the above technical solution, a stirring motor is used to drive multiple groups of stirring blades for stirring, so that the wastewater inside the sedimentation tank can generate a vortex, which helps to separate the solid impurities and suspended impurities in the wastewater, and then helps to precipitate the solid impurities at the bottom of the sedimentation tank. When the stirring motor drives the stirring shaft to rotate, it can synchronously drive multiple scrapers to scrape off the solid impurities adhered to the inner side wall of the sedimentation tank, so that the solid impurities are precipitated.

[0021] In a specific possible implementation manner, a storage tank for storing flocculants is fixedly installed on the top of the sedimentation tank, and a slow-release tube is provided on the storage tank. The slow-release tube is fixedly connected to the storage tank and passes through the top wall of the sedimentation tank.

[0022] By adopting the above technical solution, while multiple groups of stirring blades are stirring the wastewater, the flocculant stored in the storage tank is slowly released into the sedimentation tank through the slow-release tube, which helps to make the impurities in the wastewater inside the sedimentation tank coagulate into floccules, thereby helping to improve the sedimentation effect of solid impurities in the wastewater in the sedimentation tank.

[0023] In a specific possible implementation scheme, the biofilm treatment component includes a flow stirring motor, a flow stirring fan and a plurality of biofilm carriers, wherein the plurality of biofilm carriers are vertically spaced apart in the biological treatment tank, the flow stirring motor is arranged on the inner bottom wall of the biological treatment tank, the flow stirring fan is fixedly connected to the output end of the flow stirring motor, and the flow stirring fan is used to stir the water flow.

[0024] By adopting the above technical solution, a microbial membrane is cultivated on the surface of a biofilm carrier plate, so that the degradation effect of microorganisms is utilized to purify and decompose soluble organic matter and part of suspended matter in wastewater.

[0025] A segmented wastewater treatment process, based on the segmented wastewater treatment device, comprises the following steps:

[0026] Step 1: Oil separation treatment, passing the wastewater into the separation tank, using the separation component to separate the oil in the wastewater, and using the oil discharge component to discharge the separated oil from the separation tank;

[0027] Step 2: Solid impurity precipitation treatment. After step 1 is completed, the wastewater is passed into a sedimentation tank, the wastewater is stirred by a stirring sedimentation component, and a flocculant is used to precipitate the solid impurities in the wastewater;

[0028] Step 3: Biofilm treatment. After step 2 is completed, the wastewater is passed into the biological treatment tank and biofilm treatment is performed on the wastewater using the biofilm treatment component.

[0029] By adopting the above technical scheme, during the filtration process of wastewater, the separation component is used to separate the oil and solid impurities in the wastewater, which helps to improve the separation effect of the oil and solid impurities in the wastewater, thereby improving the filtration effect of the wastewater, and further ensuring the effect of subsequent sedimentation treatment and biofilm treatment.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The present application arranges a separation component, an oil discharge component and a slag removal component. The separation component helps to separate oil and solid impurities in wastewater, the oil discharge component helps to clean and discharge the oil separated from the wastewater inside the separation tank, and the slag removal component helps to collect and remove the solid impurities separated from the oil inside the separation tank, which helps to improve the separation effect of oil and solid impurities in wastewater, thereby improving the filtering treatment effect of the wastewater, and further ensuring the subsequent treatment effect of the wastewater.

[0032] 2. In the present application, a slow-release box and a stirring paddle are arranged. The slow-release box helps to slowly release the water treatment agent into the separation tank, thereby helping to cause the wastewater to break, and further helping to separate the oil from the wastewater and float to the surface of the wastewater, helping to improve the separation effect of the oil in the wastewater; the stirring paddle helps to stir the wastewater inside the separation tank, helps to improve the mixing effect of the water treatment agent and the wastewater, thereby ensuring the effect of the water treatment agent and further improving the separation effect of the oil in the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0034] Figure 2 It is a partial structural cross-sectional view that reflects the specific internal structure of the separation tank.

[0035] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0036] Figure 4 It is a local structural cross-sectional view that reflects the specific internal structure of the sedimentation tank.

[0037] Figure 5 It is a partial structural cross-sectional view that reflects the specific internal structure of the biological treatment tank.

[0038] Description of reference numerals: 1, separation tank; 2, sedimentation tank; 3, biological treatment tank; 4, separation assembly; 41, mounting seat; 42, guide cylinder; 43, primary filter screen; 44, secondary filter screen; 5, slag removal assembly; 51, slag collecting bucket; 52, slag extraction pipe; 53, slag extraction pump; 6, oil discharge assembly; 61, power motor; 62, rotating shaft; 621, snap-on groove; 63, floating disc; 64, oil scraper; 7, wastewater lifting structure; 8, stirring sedimentation assembly; 8 1. Stirring motor; 82. Stirring shaft; 83. Stirring blade; 9. Biofilm treatment component; 91. Stirring motor; 92. Stirring fan; 93. Biofilm carrier; 10. Connecting pipe; 11. Oil discharge opening; 12. Oil discharge pipe; 13. Slow-release box; 14. Stirring paddle; 15. Backwash pipe; 16. Pipeline valve; 17. Backwash pump; 18. Connecting rod; 19. Scraper; 20. Storage tank; 21. Slow-release pipe; 22. Lifting pipe; 23. Lifting pump. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with the accompanying drawings.

[0040] The present application discloses a segmented wastewater treatment device, referring to Figure 1 , including a separation tank 1, a sedimentation tank 2 and a biological treatment tank 3 which are fixedly installed in sequence, a wastewater lifting structure 7 is arranged between the separation tank 1 and the sedimentation tank 2, the wastewater lifting structure 7 includes a lifting pipe 22 and a lifting pump 23, one end of the lifting pipe 22 is fixedly connected with the separation tank 1, the end of the lifting pipe 22 away from the separation tank 1 is fixedly connected with the sedimentation tank 2, the connection position of the lifting pipe 22 and the sedimentation tank 2 is higher than the connection position of the lifting pipe 22 and the separation tank 1, and the lifting pump 23 is fixedly connected with the lifting pipe 22. A connecting pipe 10 is fixedly connected on the side wall of the sedimentation tank 2, and the end of the connecting pipe 10 away from the sedimentation tank 2 is fixedly connected with the biological treatment tank 3.

[0041] Reference Figure 1 and Figure 2A separation assembly 4 is arranged inside the separation tank 1, and the separation assembly 4 includes a mounting seat 41, a guide cylinder 42, a primary filter screen 43 and a secondary filter screen 44. The mounting seat 41 is fixedly mounted on the inner wall of the separation tank 1, and the mounting seat 41 divides the separation tank 1 into an upper chamber and a lower chamber that are interconnected, and the upper chamber is connected to the lifting pipe 22. The guide cylinder 42 is arranged in a conical shape, the top opening of the guide cylinder 42 is smaller than the bottom opening, and the guide cylinder 42 is fixedly connected to the inner wall of the mounting seat 41. The primary filter screen 43 is fixedly mounted at the bottom end of the guide cylinder 42, and the secondary filter screen 44 is fixedly mounted at the top end of the guide cylinder 42, and the primary filter screen 43 and the secondary filter screen 44 are both arranged in an arc shape.

[0042] Reference Figure 1 and Figure 2 When filtering, the wastewater is passed into the lower chamber of the separation tank 1. After entering the lower chamber, the wastewater flows upward. Under the filtering and blocking effect of the primary filter 43 and the secondary filter 44, the oil in the wastewater can pass through the primary filter 43 and the secondary filter 44, and flow upward into the upper chamber under the guidance of the guide cylinder 42, while the solid impurities in the wastewater are still located in the lower chamber under the filtering and blocking effect of the primary filter 43 and the secondary filter 44. Thus, the oil and solid impurities in the wastewater are separated, which helps to improve the separation effect of the oil and solid impurities in the wastewater, improves the filtering and treatment effect of the wastewater, and ensures the subsequent treatment effect of the wastewater.

[0043] Reference Figure 1 and Figure 2 A slow-release box 13 is fixedly mounted on the outer wall of the separation tank 1, and the slow-release box 13 is connected to the upper chamber. A plurality of aeration discs are fixedly mounted on the bottom of the mounting seat 41, and an air supply pipe is fixedly connected between the plurality of aeration discs. The slow-release box 13 helps to induce a demulsification reaction in the wastewater by slowly releasing the water treatment agent into the separation tank 1, thereby helping to separate the oil from the wastewater and float it to the surface of the wastewater, thereby helping to improve the separation effect of the oil in the wastewater. The plurality of aeration discs can introduce air into the diversion tank, which helps to improve the floating effect of the oil, and at the same time helps to improve the mixing effect of the water treatment agent and the wastewater, thereby ensuring the effect of the water treatment agent and further improving the separation effect of the oil in the wastewater.

[0044] Reference Figure 2An oil drain assembly 6 is also provided in the separation tank 1. The oil drain assembly 6 includes a power motor 61, a rotating shaft 62, a floating disc 63 and a plurality of oil scrapers 64. The power motor 61 is fixedly mounted on the top surface of the separation tank 1. The rotating shaft 62 is vertically arranged and fixedly connected to the output shaft of the power motor 61. The rotating shaft 62 is provided with a plurality of snap-in grooves 621 along its length direction. The floating disc 63 is sleeved on the rotating shaft 62 and movably snap-into the snap-in grooves 621. A plurality of oil scrapers 64 are fixedly connected to the circumferential side wall of the floating disc 63 at intervals. An oil drain opening 11 is provided on the top side wall of the separation tank 1. An oil drain pipe 12 is provided on the outer wall of the separation tank 1. The oil drain pipe 12 is connected to the oil drain opening 11.

[0045] Reference Figure 2 The power motor 61 runs, driving the rotating shaft, the floating disk 63 and the plurality of oil scrapers 64 to rotate. The floating disk 63 drives the plurality of oil scrapers 64 to float on the water surface under the action of buoyancy, thereby helping to scrape the oil on the water surface while rotating, and send the oil into the oil discharge opening 11 under the action of the rotating centrifugal force, and discharge it through the oil discharge pipe 12, which helps to discharge the oil separated from the wastewater in time.

[0046] Reference Figure 2 A plurality of stirring paddles 14 are fixedly installed at the bottom end of the rotating shaft 62. When the power motor 61 drives the rotating shaft to rotate, the plurality of stirring paddles 14 can rotate synchronously, thereby stirring the wastewater inside the upper chamber, which helps to improve the mixing effect of the water treatment agent and the wastewater, thereby ensuring the effect of the water treatment agent and further improving the separation effect of oil pollution in the wastewater.

[0047] Reference Figure 2 A slag removal assembly 5 is also provided in the separation tank 1. The slag removal assembly 5 includes a slag collecting bucket 51, a slag extraction pipe 52 and a slag extraction pump 53. The slag collecting bucket 51 is fixedly mounted on the inner bottom end of the lower chamber, one end of the slag extraction pipe 52 is fixedly mounted inside the lower chamber, and the other end of the slag extraction pipe 52 extends through the separation tank 1. The slag extraction pump 53 is fixedly mounted on a section of the slag extraction pipe 52 located in the lower chamber and is connected to the slag extraction pipe 52. When the slag extraction pump 53 is running, the slag extraction pipe 52 generates a suction force, which helps the slag extraction pipe 52 to extract and discharge the solid impurities deposited in the slag collecting bucket 51 to the outside of the separation tank 1, thereby helping to timely discharge the solid impurities deposited in the slag collecting bucket 51, and facilitating the subsequent deposition of solid impurities in wastewater.

[0048] Reference Figure 2 and Figure 3The slag extraction pipe 52 is fixedly connected to the backwash pipe 15 at the position outside the separation tank 1, a pipeline valve 16 is fixedly installed at one end of the backwash pipe 15 close to the slag extraction pipe 52, and a backwash pump 17 is fixedly installed at one end of the backwash pipe 15 away from the slag extraction pipe 52. When the slag extraction pipe 52 is blocked, the backwash pump 17 and the backwash pipe 15 can be used to backwash the slag extraction pipe 52, thereby helping to improve the reliability of the slag extraction pipe 52 when in use.

[0049] Reference Figure 4 A stirring sedimentation assembly 8 is provided inside the sedimentation tank 2. The stirring sedimentation assembly 8 includes a stirring motor 81, a stirring shaft 82, and a plurality of stirring blades 83. The stirring motor 81 is fixedly mounted on the top surface of the sedimentation tank 2. The stirring shaft 82 is vertically arranged and fixedly connected to the output shaft of the stirring motor 81. The plurality of stirring blades 83 are fixedly connected to the circumferential side wall of the stirring shaft 82. A plurality of connecting rods 18 are also fixedly mounted on the circumferential side wall of the stirring shaft 82. A scraper 19 is fixedly connected to one end of each connecting rod 18 away from the stirring shaft 82. The scraper 19 contacts the inner wall of the stirring tank.

[0050] Reference Figure 4 The stirring motor 81 is running, driving the plurality of stirring blades 83 to stir the wastewater in the sedimentation tank 2, so that the wastewater in the sedimentation tank 2 generates a vortex, thereby helping to separate the solid impurities and suspended impurities in the wastewater, and further helping to make the solid impurities settle at the bottom of the sedimentation tank 2. When the stirring motor 81 drives the stirring shaft 82 to rotate, it simultaneously drives the plurality of scrapers 19 to scrape off the solid impurities adhering to the inner wall of the sedimentation tank 2, thereby helping to clean the inner wall of the sedimentation tank 2 simultaneously.

[0051] Reference Figure 4 A storage tank 20 is fixedly placed on the top surface of the sedimentation tank 2, and a slow-release tube 21 is fixedly connected to the bottom of the storage tank 20. The end of the slow-release tube 21 away from the storage tank 20 passes through the top wall of the sedimentation tank 2 and is inserted into the sedimentation tank 2. The storage tank 20 slowly releases flocculant into the sedimentation tank 2 through the slow-release tube 21, so that the impurities in the wastewater in the sedimentation tank 2 are condensed into floccules, which helps to improve the precipitation effect of solid impurities in the wastewater in the sedimentation tank 2.

[0052] Reference Figure 5 A biofilm treatment assembly 9 is provided inside the biological treatment tank 3. The biofilm treatment assembly 9 includes a flow stirring motor 91, a flow stirring fan 92 and a plurality of biofilm carriers 93. The plurality of biofilm carriers 93 are fixedly installed in the biological treatment tank 3 and arranged vertically at intervals. The flow stirring motor 91 is fixedly installed on the inner bottom wall of the biological treatment tank 3. The flow stirring fan 92 is fixedly connected to the output end of the flow stirring motor 91. When wastewater flows into the biological treatment tank 3, the microbial film cultivated on the surface of the biofilm carrier 93 can purify and decompose the soluble organic matter and part of the suspended matter in the wastewater by the degradation action of microorganisms.

[0053] The present application also discloses a treatment process based on the above-mentioned segmented wastewater treatment device, comprising the following steps:

[0054] Step 1: Oil and dirt separation treatment, the wastewater is passed into the lower chamber of the separation tank 1, and the wastewater flows upward after entering the lower chamber. Under the filtering and blocking effect of the primary filter 43 and the secondary filter 44, the oil and dirt in the wastewater can pass through the primary filter 43 and the secondary filter 44, and flow upward into the upper chamber under the guidance of the guide cylinder 42, while the solid impurities in the wastewater are still located in the lower chamber under the filtering and blocking effect of the primary filter 43 and the secondary filter 44, so that the oil and dirt in the wastewater are separated, which helps to improve the separation effect of the oil and solid impurities in the wastewater, improves the filtering treatment effect of the wastewater, and ensures the subsequent treatment effect of the wastewater.

[0055] The slow-release box 13 slowly releases the water treatment agent into the separation tank 1, thereby helping to promote the demulsification reaction of the wastewater, thereby helping to separate the oil from the wastewater and float it to the surface of the wastewater, helping to improve the separation effect of the oil in the wastewater. Multiple aeration plates can introduce air into the diversion tank and multiple stirring paddles 14 can stir the wastewater in the upper chamber, which can help to improve the mixing effect of the water treatment agent and the wastewater, thereby ensuring the effect of the water treatment agent and further improving the separation effect of the oil in the wastewater.

[0056] The power motor 61 rotates, driving the rotating shaft, the floating disc 63 and the plurality of scrapers 64 to rotate. The floating disc 63 drives the plurality of scrapers 64 to float on the water surface under the action of buoyancy, thereby helping to scrape the oil on the water surface while rotating, and send the oil into the oil discharge opening 11 under the action of the rotating centrifugal force, and discharge it through the oil discharge pipe 12, which helps to discharge the oil separated from the wastewater in time. The slag pump 53 operates, so that the slag pipe 52 generates suction force, which helps the slag pipe 52 to suck and discharge the solid impurities deposited in the slag collecting bucket 51 to the outside of the separation tank 1, thereby helping to discharge the solid impurities deposited in the slag collecting bucket 51 in time.

[0057] Step 2: Solid impurity precipitation treatment, the stirring motor 81 runs, driving the multiple groups of stirring blades 83 to stir the wastewater inside the sedimentation tank 2, so that the wastewater inside the sedimentation tank 2 generates vortexes, which helps to separate the solid impurities and suspended impurities in the wastewater, and further helps to precipitate the solid impurities at the bottom of the sedimentation tank 2.

[0058] Step 3: Biofilm treatment. When the wastewater flows into the biological treatment tank 3, the microbial film cultured on the surface of the biofilm carrier 93 can utilize the degradation effect of microorganisms to purify and decompose the soluble organic matter and part of the suspended matter in the wastewater.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A segmented wastewater treatment device, characterized in that: The invention comprises a separation tank (1), a sedimentation tank (2) and a biological treatment tank (3) which are arranged in sequence. The separation tank (1) is provided with a separation component (4) for separating oil and solid impurities in wastewater, a slag removal component (5) for collecting and removing the separated solid impurities and an oil discharge component (6) for cleaning and discharging the separated oil. The separation tank (1) and the sedimentation tank (2) are provided with a wastewater lifting structure (7) for conveying the wastewater in the separation tank (1) into the sedimentation tank (2). The sedimentation tank (2) is provided with a stirring sedimentation component (8) for precipitating the solid impurities in the wastewater. The sedimentation tank (2) A connecting pipe (10) for connecting to the biological treatment tank (3) is arranged at the top of the separation tank (1); a biofilm treatment component (9) for removing soluble organic matter and part of suspended matter in the wastewater is arranged in the biological treatment tank (3); the separation component (4) comprises a mounting seat (41), a guide cylinder (42), a primary filter screen (43) and a secondary filter screen (44); the mounting seat (41) is arranged on the inner wall of the separation tank (1), and the mounting seat (41) divides the separation tank (1) into an upper chamber and a lower chamber that are connected to each other; the guide cylinder (42) is fixedly connected to the mounting seat (41); the guide cylinder (42) is arranged in a conical shape and is used In order to guide the oil in the lower chamber to float to the upper chamber, the primary filter (43) is arranged at the bottom end of the guide cylinder (42), the secondary filter (44) is arranged at the top end of the guide cylinder (42), and the primary filter (43) and the secondary filter (44) are both used to filter and intercept solid impurities; the oil discharge component (6) comprises a power motor (61), a rotating shaft (62), a floating plate (63) and a plurality of oil scraping plates (64), the power motor (61) is arranged at the top end of the separation tank (1), the rotating shaft (62) is fixedly connected to the output shaft of the power motor (61), and the rotating shaft (62) is connected to the output shaft of the power motor (61). ) is provided with a snap-in groove (621) along its length direction, the floating plate (63) is sleeved on the rotating shaft (62) and movably snap-in in the snap-in groove (621), a plurality of the scraping plates (64) are arranged at intervals on the circumferential side wall of the floating plate (63), an oil discharge opening (11) for discharging oil pollution is provided on the top side wall of the separation tank (1), and an oil discharge pipe (12) for connecting to the oil discharge opening (11) is provided on the side wall of the separation tank (1); the primary filter screen (43) and the secondary filter screen (44) are both arranged in an arc shape; a plurality of aeration plates are fixedly installed at the bottom of the mounting seat, and air supply pipes are fixedly connected between the plurality of aeration plates.

2. A segmented wastewater treatment device according to claim 1, characterized in that: A slow-release box (13) for slowly releasing a water treatment agent into the separation tank (1) is arranged on the outer wall of the separation tank (1), and a stirring paddle (14) for stirring wastewater is arranged at one end of the rotating shaft (62) away from the power motor (61).

3. A segmented wastewater treatment device according to claim 1, characterized in that: The slag removal component (5) comprises a slag collecting bucket (51), a slag extraction pipe (52) and a slag extraction pump (53); the slag collecting bucket (51) is arranged at the inner bottom end of the separation tank (1); the slag extraction pump (53) is fixedly installed inside the slag collecting bucket (51); one end of the slag extraction pipe (52) is fixedly connected to the slag extraction pump (53); and one end of the slag extraction pipe (52) away from the slag extraction pump (53) is arranged outside the separation tank (1).

4. A segmented wastewater treatment device according to claim 3, characterized in that: A backwash pipe (15) is provided at a portion of the slag extraction pipe (52) located outside the separation tank (1); a pipeline valve (16) is provided at one end of the backwash pipe (15) close to the slag extraction pipe (52); and a backwash pump (17) is provided at one end of the backwash pipe (15) away from the slag extraction pipe (52).

5. A segmented wastewater treatment device according to claim 1, characterized in that: The stirring and settling component (8) comprises a stirring motor (81), a stirring shaft (82) and a plurality of stirring blades (83); the stirring motor (81) is arranged at the top of the settling tank (2); the stirring shaft (82) is fixedly connected to the output shaft of the stirring motor (81); the plurality of stirring blades (83) are connected to the stirring shaft (82); a plurality of connecting rods (18) are arranged on the stirring shaft (82); a scraper (19) is arranged at one end of each connecting rod (18) away from the stirring shaft (82); and the scraper (19) contacts the inner wall of the stirring tank.

6. A segmented wastewater treatment device according to claim 5, characterized in that: A storage tank (20) for storing flocculants is fixedly installed on the top of the sedimentation tank (2), and a slow-release tube (21) is arranged on the storage tank (20). The slow-release tube (21) is fixedly connected to the storage tank (20) and passes through the top wall of the sedimentation tank (2).

7. A segmented wastewater treatment device according to claim 1, characterized in that: The biofilm treatment component (9) comprises a flow stirring motor (91), a flow stirring fan (92) and a plurality of biofilm carriers (93), wherein the plurality of biofilm carriers (93) are vertically spaced apart in the biological treatment tank (3), the flow stirring motor (91) is arranged on the inner bottom wall of the biological treatment tank (3), the flow stirring fan (92) is fixedly connected to the output end of the flow stirring motor (91), and the flow stirring fan (92) is used to stir the water flow.

8. A segmented wastewater treatment process, based on a segmented wastewater treatment device according to any one of claims 1 to 7, characterized in that: The process includes the following steps: Step 1: Oil separation treatment, passing wastewater into a separation tank (1), separating the oil in the wastewater using a separation component (4), and discharging the separated oil from the separation tank (1) using an oil discharge component (6); Step 2: solid impurity precipitation treatment. After step 1 is completed, the wastewater is passed into a sedimentation tank (2), the wastewater is stirred by a stirring sedimentation component (8), and a flocculant is used to precipitate the solid impurities in the wastewater; Step 3: Biofilm treatment. After step 2 is completed, the wastewater is passed into the biological treatment tank (3) and the biofilm treatment component (9) is used to perform biofilm treatment on the wastewater.

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