Staged treatment device and method for production wastewater

Abstract

The invention discloses a staged treatment device and method for production wastewater, the staged treatment device for the production wastewater comprises a treatment box, a plurality of filtering structures, a plurality of isolation structures and a suction structure, the plurality of filtering structures are arranged in all treatment cavities in a one-to-one correspondence mode and located below the water level of the corresponding treatment cavity, and the plurality of isolation structures are arranged in the treatment box; the filtering structure is used for filtering solid impurities; the plurality of isolation structures are respectively provided with an isolation end, and each isolation end is movably arranged above each filtering structure and is used for staggering or blocking a communication channel between the filtering structure and the water inlet; the suction structure is communicated with a plurality of treatment cavities positioned above the filtering structure and is used for sucking the filtered water body in the treatment cavities; synchronous treatment of solid impurities and an oil layer in production wastewater is realized, an oil removal device and impurity cleaning equipment do not need to be independently arranged in each stage of treatment process, the equipment cost is reduced, and meanwhile, the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a device and method for grading production wastewater. Background Art

[0002] Wastewater treatment involves a series of purification processes to ensure that wastewater meets water quality standards for discharge into specific water bodies or recycling. Wastewater treatment is widely used in a variety of sectors, including construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscapes, healthcare, and catering, and has become an integral part of everyday life. Wastewater treatment equipment treats domestic and industrial wastewater to prevent damage to the environment, particularly aquatic ecosystems. Since wastewater contains many harmful components, such as animal and vegetable oils, suspended solids, carbohydrates, proteins, surfactants, nitrogen and phosphorus compounds, and microorganisms, treatment of discharged wastewater is essential.

[0003] Publication number CN108862761A provides a low-energy domestic sewage staged treatment device, comprising a main body and a sedimentation tank. An aeration tank is provided on the left side of the main body, with a first drain hole on the right side. The sedimentation tank is located on the right side of the main body. Copper rods are embedded on both the front and rear sides of the aeration tank, and a drain pipe is provided on the rear side of the aeration tank. Quartz stone filter layers are arranged inside the filter tank. A main shaft is installed inside the aeration tank, and a water-turning plate is welded to the outside of the rotating rod. The outside of the aeration tank is electroplated with a black chrome layer. A protective housing is installed on the rear side of the main body, and a photovoltaic inverter and battery pack are installed inside the protective housing. This solution achieves graded sewage treatment through three-stage filter tanks, aeration tanks, filter tanks, and sedimentation tanks.

[0004] During the sewage feeding stage and intermediate treatment process, each stage will have a certain amount of solid impurities or flocculated solid particles. Therefore, existing equipment will be equipped with equipment for filtering and cleaning impurities to deal with these solid impurities; however, in the graded treatment process of oily sewage, each stage needs to be equipped with a special oil removal device and equipment for filtering and cleaning impurities, which increases the complexity and cost of the equipment and makes the operation more cumbersome. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a device and method for the graded treatment of production wastewater, so as to solve the technical problem that in the prior art, during the graded treatment of oily wastewater, each stage of the wastewater treatment device needs to be equipped with a special oil removal device and equipment for filtering and cleaning impurities, which increases the complexity and cost of the equipment and makes the operation more cumbersome.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a device and method for the graded treatment of industrial wastewater. In the first aspect, the present invention provides a device and method for the graded treatment of industrial wastewater, comprising: a treatment box, a plurality of filtering structures, a plurality of isolation structures and a suction structure. The treatment box has a plurality of treatment chambers arranged along the height direction, and the upper and lower ends of each treatment chamber are respectively provided with a water inlet and a water outlet, and the water outlet of the upper treatment chamber is connected to the water inlet of the lower treatment chamber; a plurality of filtering structures are respectively arranged in each treatment chamber in a one-to-one correspondence and are below the water level of the corresponding treatment chamber, and the filtering structures are used to filter solid impurities; a plurality of isolation structures each have an isolation end, and each isolation end is movably arranged above each filtering structure for staggering or blocking the communication channel between the filtering structure and the water inlet; the suction structure is connected to the plurality of treatment chambers located above the filtering structure, and is used to suck the filtered water in the treatment chamber.

[0007] In some embodiments, a plurality of chamber partition plates are sequentially arranged in the processing box from top to bottom to divide the interior of the processing box into a plurality of processing chambers, and each of the chamber partition plates is provided with a connecting pipe and a solenoid valve.

[0008] In some embodiments, several of the isolation structures also include an isolation drive member, which is connected to the isolation end and is used to drive the isolation end to slide on the filtering structure, so that the isolation end has a first state in which it is staggered with the filtering structure, and a second state in which it covers the filtering structure.

[0009] In some embodiments, the isolation end includes an isolation plate, the filtering structure includes a filter plate, the isolation plate is slidingly connected to the filter plate and the inner wall of the processing box, and when the isolation plate is in the second state, the top surface of the filter plate is in contact with the top surface of the isolation plate.

[0010] In some embodiments, a sharp portion is provided at one end of the isolation plate facing away from the isolation drive member, and the cross-sectional area of the sharp portion gradually decreases from one end toward the isolation drive member to the other end. When the isolation end is in the second state, one side of the sharp portion is in contact with the filter plate.

[0011] In some embodiments, the grading treatment device for production wastewater also includes a discharge scraping structure, which includes a scraping member arranged on the isolation end, the scraping surface of the scraping member corresponds to the suction port of the suction structure, and its two ends extend along the width direction of the isolation end and are respectively slidably connected to the corresponding two side walls of the treatment box.

[0012] In some embodiments, the device for graded treatment of production wastewater further includes a heating structure, which is connected to the treatment tank and is used to heat the water in the treatment tank.

[0013] In some embodiments, the heating structure includes a gas heating box and several gas injection parts. The gas heating box is used to heat the gas. The gas outlet of the gas heating box is connected to the gas inlet ends of several gas injection parts. The gas outlet ends of several gas injection parts are respectively connected to each of the processing chambers, so as to introduce the gas heated by the gas heating box into the processing chamber; and the height of the gas outlet ends of the gas injection parts are lower than the filtering structure in the processing chamber where they are located.

[0014] In some embodiments, each of the gas injection components includes a gas conducting tube and several gas injection tubes. The gas conducting tube is arranged around the outside of the processing box, and the several gas injection tubes are arranged in sequence around the outer wall of the processing box. One end of each gas injection tube is connected to the gas conducting tube, and the other end passes through the outer wall of the processing box and extends into the processing chamber.

[0015] In a second aspect, the present invention provides a method for graded treatment of industrial wastewater, comprising a device for graded treatment of industrial wastewater as described above, wherein the method for graded treatment of industrial wastewater comprises the following steps: S101: introducing the production wastewater to be treated into the uppermost treatment chamber of the treatment tank; S102: The production wastewater is filtered through the filter structure, and the solid impurities are retained above the filter structure. At the same time, the oil layer floats on the surface of the water above the filter structure; S103: Isolating the water above and below the filter structure by blocking the filter end on the filter surface of the filter structure; S104: starting the suction structure to extract the water carrying oil and solid impurities above the filtering structure; S105: The water in the treatment tank flows through the next treatment chamber in turn, and steps S102 to S104 are repeated until the water has been treated by all treatment chambers. At the same time, after the sewage in each treatment chamber is emptied, new production wastewater to be treated is introduced for the next round of treatment; S106: The clean water after multi-stage treatment is discharged from the treatment chamber at the bottom of the treatment tank, completing the graded treatment of production wastewater.

[0016] Compared with the prior art, the device and method for graded treatment of production wastewater provided by the present invention are provided with a treatment box, several filtering structures, several isolation structures and a suction structure. The filtering structure is used to filter solid impurities in the sewage, so that the solid impurities and oil layers in the sewage are retained above the filtering structure. The isolation structure can isolate the solid impurities and oil layers from the wastewater below, avoiding the oil layer from flowing into the bottom of the filtering structure during the cleaning process, and at the same time keeping part of the sewage on the filtering structure, which is convenient for subsequent cleaning of filtered impurities; the suction structure is provided to extract the sewage above the filtering structure, so that the solid impurities and oil layers can be extracted together with the sewage. This scheme realizes the synchronous treatment of solid impurities and oil layers in production wastewater, and there is no need to separately set up an oil removal device and impurity cleaning equipment in each stage of treatment. The equipment structure is simplified, the equipment cost is reduced, and the efficiency of wastewater treatment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of the main structure of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 3 1 is a schematic diagram of the main cross-sectional structure of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 4 This is a partial structural diagram of the installation of a treatment box of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 5 This is a partial three-dimensional structural diagram of the installation of the isolation plate and the treatment box of the staged treatment device for industrial wastewater provided by an embodiment of the present invention; Figure 6 1 is a side structural schematic diagram of a heating structure of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 7 1 is a schematic diagram of a top cross-section of a heating structure of an embodiment of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 8 1 is a schematic diagram of a top cross-section of a heating structure of another embodiment of the device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 9 This is a structural diagram of the installation of scraping plates and isolation plates of the device for grading industrial wastewater provided by an embodiment of the present invention; Figure 10 1 is a schematic top cross-sectional structural diagram of a discharge scraping structure of a device for graded treatment of industrial wastewater provided by an embodiment of the present invention; Figure 11It is a schematic cross-sectional structural diagram of a cleaning structure of a device for graded treatment of production wastewater provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Processing box; 11. Processing chamber; 12. Chamber partition plate; 13. Connecting pipe; 14. Solenoid valve; 15. Sealing outer frame; 101. Square box; 102. Round box; 2. Filter structure; 21. Filter plate; 22. Porous baffle; 3. Isolation structure; 301. Isolation end; 31. Isolation plate; 311. Sharp portion; 32. Isolation drive member; 33. Mounting frame; 4. Suction structure; 41. Transfer box; 42. Suction pipe; 43. Suction valve; 44. First connecting pipe; 45. Second connecting pipe; 5. Discharge scraping structure; 51. Scraping member; 511. Scraping plate; 52. Scraping drive member; 521. Scraping motor; 522. First bevel gear set; 523. First transmission rod; 524. Second bevel gear set; 525. Transmission screw; 526. Threaded sleeve; 6. Heating structure; 61. Gas heating box; 62. Gas injection member; 621. Gas conducting pipe; 622. Gas injection pipe; 623. Gas injection valve; 7. Cleaning structure; 71. Cleaning motor; 72. Scraper; 73. Stirring rod. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In order to solve the technical problem that, in the hierarchical treatment process of oily wastewater, each stage of the wastewater treatment device needs to be equipped with a special oil removal device and equipment for filtering and cleaning impurities, which increases the complexity and cost of the equipment and makes the operation more cumbersome, the present invention provides a hierarchical treatment device and method for production wastewater, which realizes the simultaneous treatment of solid impurities and oil layers in the production wastewater, eliminates the need to separately set up an oil removal device and impurity cleaning equipment in each stage of the treatment process, simplifies the equipment structure, reduces the equipment cost, and improves the efficiency of wastewater treatment.

[0021] See also Figures 1 to 11, firstly, an embodiment of the present application provides a graded treatment device for industrial wastewater, comprising: a treatment box 1, a plurality of filter structures 2, a plurality of isolation structures 3 and a suction structure 4, the treatment box 1 has a plurality of treatment chambers 11 arranged along the height direction, the upper and lower ends of each treatment chamber 11 are respectively provided with a water inlet and a water outlet, the water outlet of the upper treatment chamber 11 is connected to the water inlet of the treatment chamber 11 located below; a plurality of filter structures 2 are respectively arranged in each treatment chamber 11 in a one-to-one correspondence, and are located below the water level of the corresponding treatment chamber 11, and the filter structure 2 is used to filter solid impurities; a plurality of isolation structures 3 each have an isolation end 301, and each isolation end 301 is movably arranged above each filter structure 2, for staggering or blocking the communication channel between the filter structure 2 and the water inlet; the suction structure 4 is connected to the plurality of treatment chambers 11 located above the filter structure 2, for sucking the filtered water in the treatment chamber 11.

[0022] In this device, the treatment box 1 has several treatment chambers 11 arranged in the height direction and connected in sequence. Several treatment chambers 11 are used to treat production wastewater step by step; several filter structures 2 are respectively arranged in each treatment chamber 11, which can effectively filter solid impurities in the wastewater. The solid impurities in the wastewater are filtered by the filter structure 2 and will be retained above the filter structure 2. At the same time, the position of the filter structure 2 is below the water level of the corresponding treatment chamber 11, so that the oil layer in the wastewater will also float above the filter structure 2; the solid impurities and the oil layer are isolated from the wastewater below by the isolation structure 3, which avoids the oil layer from flowing into the wastewater during the cleaning process. Below the filter structure 2, while allowing part of the sewage to be retained above the filter structure 2, so that in the subsequent suction process, impurities can be sucked out together with the sewage, thereby facilitating the cleaning of impurities and oil stains; the filtering ends of several isolation structures 3 can be staggered or blocked above the filter structure 2, so that when it is necessary to clean the solid impurities and oil layer on the filter structure 2, the solid impurities and oil layer can be isolated from the wastewater below through the movable isolation end 301, and the water carrying oil and solid impurities on the filter structure 2 can be extracted in conjunction with the suction structure 4, thereby realizing the simultaneous treatment of the oil layer and solid impurities in the production wastewater and improving the efficiency of wastewater treatment.

[0023] It should be noted that in some embodiments, each treatment chamber 11 may be equipped with different levels of wastewater treatment components to accommodate treatment requirements for wastewater of varying concentrations. Wastewater treatment components include, but are not limited to, sedimentation units, biological treatment units, and chemical treatment units. A corresponding dosing port, etc., may also be provided within the treatment chamber 11. Through the coordinated operation of these various levels of equipment, pollutants in the wastewater can be removed step by step, ensuring that the treated wastewater meets discharge standards or reuse requirements.

[0024] See also Figures 1 to 4In this embodiment, a plurality of chamber partitions 12 are arranged sequentially from top to bottom within the treatment box 1 to divide the interior of the treatment box 1 into a plurality of treatment chambers 11. Each chamber partition 12 is provided with a connecting pipe 13 and a solenoid valve 14. The connecting pipe 13 connects adjacent treatment chambers 11, and the solenoid valve 14 controls the opening and closing of the connecting pipe 13. After wastewater is treated in one treatment chamber 11, the corresponding solenoid valve 14 is opened, allowing the wastewater to flow through the connecting pipe 13 into the next treatment chamber 11 for further treatment.

[0025] See also Figures 1 to 5 In some possible embodiments, several isolation structures 3 also include an isolation drive member 32, which is installed outside the processing box 1. The isolation drive member 32 can be a cylinder, a hydraulic cylinder, a ball screw structure, etc., which can drive the isolation end 301 to move horizontally. The upper surface of the filter structure 2 forms a filter surface. The driving end of the isolation drive member 32 is connected to the isolation end 301, and is used to drive the isolation end 301 to slide on the filter structure 2, so that the isolation end 301 has a first state in which it is staggered with the filter surface of the filter structure 2, and a second state in which it covers the filter surface of the filter structure 2.

[0026] In the first state, the isolation end 301 is staggered with the filter surface of the filter structure 2, allowing wastewater to flow freely through the filter structure 2 and undergo normal filtration. When it is necessary to clean solid impurities and oil layers on the filter structure 2, the isolation drive 32 can be used to drive the isolation end 301 to slide to the second state. In this state, the isolation end 301 completely covers the filter surface of the filter structure 2, completely isolating the solid impurities and oil layers from the wastewater below, thereby improving cleaning efficiency.

[0027] In one embodiment, the isolation drive member 32 is a cylinder, and a mounting bracket 33 is provided on the outside of the processing box 1. The cylinder is mounted on the mounting bracket 33. The isolation end 301 includes an isolation plate 31. The telescopic end of the cylinder is connected to one end of the isolation plate. The other end of the isolation plate 31 passes through one side of the processing box 1 and extends into the processing box 1. The filtering structure 2 includes a filter plate 21. The filter plate 21 is fixedly installed inside the processing box 1. The bottom surface of the isolation plate 31 corresponds to the bottom surface of the filter plate 21, and the two sides contact the two side walls of the processing box 1. It is slidably connected to the filter plate 21 and the inner wall of the processing box 1. When the isolation plate 31 is in the second state, the top surface of the filter plate 21 is in contact with the top surface of the isolation plate 31. When it is necessary to clean the filtered impurities and the oil layer on the water surface, the telescopic end of the cylinder extends out, driving the isolation plate 31 to slide along the inner wall of the treatment box 1 and the bottom surface of the filter plate 21 until the isolation plate 31 completely covers the top surface of the filter plate 21. At this time, the solid impurities and oil layer on the filter plate 21 are completely isolated by the isolation plate 31 above the wastewater below. Subsequently, the suction structure 4 is started, and the suction structure 4 is connected to the treatment chamber 11 located above the filter structure 2 in the treatment box 1 through a pipeline, and the water carrying solid impurities and the oil layer is extracted from the treatment box 1 for centralized treatment. After the cleaning is completed, the telescopic end of the cylinder retracts, driving the isolation plate 31 to slide back to the first state along the original path. At this time, the wastewater in the treatment box 1 can continue to flow through the filter structure 2 for filtration treatment.

[0028] Furthermore, in order to prevent wastewater leakage, in some possible embodiments, a sealing outer frame 15 is provided on one side of the treatment box 1 at a position corresponding to the isolation plate 31. When the isolation plate 31 is in the first state and the second state, it is always partially in the sealing outer frame 15. A waterproof ring is provided on the inner side of the sealing outer frame 15. The waterproof ring is in close contact with the isolation plate 31, thereby ensuring that during the sliding process of the isolation plate 31, wastewater will not leak out from the gap between the isolation plate 31 and the treatment box 1.

[0029] Furthermore, in some possible embodiments, a sharp portion 311 is provided at one end of the isolation plate 31 facing away from the isolation driver 32. The cross-sectional area of the sharp portion 311 gradually decreases from the end facing the isolation driver 32 to the other end. When the isolation end 301 is in the second position, one surface of the sharp portion 311 abuts against the filter plate 21. The provision of the sharp portion 311 helps the isolation plate 31 to better penetrate impurities or oil layers that may adhere to the filter plate 21 when the isolation plate 31 moves from the first position to the second position. This facilitates scraping off stubborn impurities or oil layers adhering to the filter plate 21 during the cleaning process, thereby improving cleaning efficiency.

[0030] It should be noted that in other possible embodiments, the filter structure 2 and isolation structure 3 can also adopt other designs to adapt to different wastewater treatment requirements. For example, the isolation structure 3 can be manually driven, or the isolation plate 31 can be replaced with another type of isolation structure 3. Furthermore, in this solution, the aperture size of the filter plates within each stage of the treatment chamber 11 is not limited. The apertures of the multiple filter plates can be spaced sequentially from top to bottom, and the apertures can also be set to the desired size according to the actual treatment requirements of each layer, so as to meet the requirements for stage-by-stage filtration of the wastewater.

[0031] See also Figures 1 to 3 In order to achieve the suction of solid impurities and oil layers, in some possible embodiments, the suction structure 4 includes a transfer box 41, a suction pump, a suction pipe 42, a first connecting pipe 44, and a second connecting pipe 45. The suction pump is arranged in the transfer box 41 and is used to generate negative pressure to suck the filtered water in the treatment chamber 11; there are multiple groups of suction pipes 42, each of which is provided with a suction valve 43. One end of the suction pipe 42 is connected to the treatment chamber 11 located above the filter structure 2 in the treatment box 1, and the other end is connected to the second connecting pipe 45. The bottom end of the second connecting pipe 45 is connected to one end of the first connecting pipe 44, and the other end of the first connecting pipe 44 is connected to the input end of the suction pump, for introducing the water in the treatment chamber 11 into the suction pump. The suction valve 43 is used to control the on-off of the suction pipe 42 so as to selectively suck water from different treatment chambers 11 as needed.

[0032] Furthermore, in some possible embodiments, the suction structure 4 also includes a control unit, which is electrically connected to the suction pump and each suction valve 43, and is used to control the opening and closing of the suction pump and each suction valve 43. Through the control unit, the working state of the suction pump and the opening and closing of each suction valve 43 can be accurately controlled according to actual needs, thereby achieving accurate suction of water bodies in different treatment chambers 11. For example, when it is necessary to clean solid impurities and oil layers in a certain treatment chamber 11, the control unit can control the suction valve 43 connected to the treatment chamber 11 to open, and at the same time start the suction pump to extract the water body in the treatment chamber 11 for centralized treatment. After the cleaning is completed, the control unit controls the suction valve 43 to close and stop the suction process. Such a control method not only improves the efficiency of wastewater treatment, but also ensures the accuracy of wastewater treatment.

[0033] In addition, in order to further improve the efficiency of wastewater treatment, the suction strength of the suction structure 4 in the embodiment of the present application is adjustable. The suction strength of the suction structure 4 can be adjusted according to the wastewater treatment requirements and the liquid level of the wastewater in the treatment chamber 11 to achieve precise control of the wastewater suction rate.

[0034] It should be noted that in other possible embodiments, multiple suction structures 4 can be provided, each equipped with a suction pump, and each layer is suctioned by a separate suction structure 4, thereby improving the flexibility and efficiency of wastewater treatment. Each suction structure 4 can operate independently and perform suction operations based on the actual conditions of the wastewater in the corresponding treatment chamber 11.

[0035] See also Figure 4 、 Figure 9 and Figure 10 In order to further reduce the amount of filtered impurities and oil remaining during the suction process, in some possible embodiments, a discharge scraping structure 5 is further provided. The discharge scraping structure 5 includes a scraper 51 disposed on the isolation end 301 and a scraper drive 52 for driving the scraper 51 to move. The scraping surface of the scraper 51 corresponds to the suction port of the suction structure 4. Its two ends extend along the width direction of the isolation end 301 and are respectively slidably connected to the corresponding two side walls of the processing box 1. The scraper drive 52 can be installed on the outside of the processing box 1 and connected to the scraper 51 to drive the scraper 51 to reciprocate on the inner wall of the processing box 1 relative to the suction port of the suction structure 4. When it is necessary to clean the impurities and oil layer attached to the inner wall of the processing box 1, the scraper drive 52 is activated, driving the scraper 51 to slide along the inner wall of the processing box 1, pushing the impurities and oil layer attached to the inner wall toward the suction port, so as to extract the impurities and oil layer from the processing box 1.

[0036] In one embodiment, the scraper 51 includes a scraper plate 511, and the scraper drive includes a scraper motor 521, a first bevel gear set 522, a first transmission rod 523, a second bevel gear set 524, a transmission screw 525, and a threaded sleeve 526. Specifically, the front end and the rear end of the scraper plate 511 are both fitted against the inner wall of the processing box 1, and the outer side of the processing box 1 is provided with a transmission screw 525 and a threaded sleeve 526 threadedly connected to the transmission screw 525 at positions corresponding to the front end and the rear end of the scraper plate 511. The two threaded sleeves 526 are respectively connected to the front and rear ends of the scraper plate 511. The scraper motor 521 is installed outside the processing box 1 through a mounting box. The output shaft of the scraper motor 521 is connected to a driving bevel gear of the first bevel gear set 522. The two driven bevel gears of the first bevel gear set 522 are respectively connected to one end of the two first transmission rods 523. The other ends of the two first transmission rods 523 are connected to the transmission screw 525 through the second bevel gear set 524, which is used to transmit the driving force of the scraper motor 521 and drive the transmission screw 525 to rotate. When the scraper motor 521 is started, its output shaft drives the driving bevel gear of the first bevel gear set 522 to rotate. The rotational motion of the driving bevel gear is transmitted to the two first transmission rods 523 through the two driven bevel gears of the first bevel gear set 522. The two first transmission rods 523 then drive the two transmission screws 525 to rotate through the second bevel gear set 524. Because the two threaded sleeves 526 are respectively threadedly connected to the two drive screws 525, when the drive screws 525 rotate, the threaded sleeves 526 will synchronously move along the axial direction of the drive screws 525, thereby driving the scraper plate 511 to reciprocate on the inner wall of the treatment box 1. The front and rear ends of the scraper plate 511 are both in contact with the inner wall of the treatment box 1. Therefore, during the reciprocating motion of the scraper plate 511, impurities and oil layers attached to the inner wall of the treatment box 1 are pushed toward the suction port, thereby extracting the impurities and oil layers from the treatment box 1.

[0037] See also Figure 1 、 Figure 2 、 Figure 4 、 Figures 6 to 8 In order to prevent the oil layer from solidifying, in this embodiment, the staged treatment device for production wastewater further includes a heating structure 6, which is connected to the treatment tank 1 and is used to heat the water in the treatment tank 1. The heating structure 6 can be arranged outside or inside the treatment tank 1 and can be an electric heating wire, a steam heater, etc., which heats the water in the treatment tank 1 to increase the water temperature, thereby preventing the oil layer from solidifying. The heating structure 6 can be connected to a temperature sensor provided in the treatment tank 1, and the temperature sensor can monitor the water temperature in the treatment tank 1 in real time, and automatically adjust the heating power of the heating structure 6 according to the change in the water temperature to keep the water temperature in the treatment tank 1 within a set range.

[0038] Preferably, in this embodiment, the heating structure 6 includes a gas heating box 61 and a plurality of gas injection members 62, each gas injection member 62 includes a gas conducting pipe 621 and a plurality of gas injection pipes 622, and the gas heating box 61 is provided with a steam heater or heating element for generating hot steam or heating gas. The gas outlet of the gas heating box 61 is connected to the gas inlet ends of the plurality of gas injection members 62, and the gas outlet ends of the plurality of gas injection members 62 are respectively connected to each processing chamber 11, for introducing the gas heated by the gas heating box 61 into the processing chamber 11. Specifically, the gas conducting pipe 621 is an annular pipe, which is arranged around the outside of the processing box 1, and the plurality of gas injection pipes 622 are arranged in sequence around the outer wall of the processing box 1, and one end of each gas injection pipe 622 is connected to the gas conducting pipe 621, and the other end passes through the outer wall of the processing box 1 and extends into the processing chamber 11. When heating structure 6 is activated, the steam heater or heating element generates hot steam or heated gas. This hot steam or heated gas enters gas injection pipe 622 through gas conduit 621 and is ejected through the gas outlet, heating the water in treatment chamber 1 and raising its temperature, thereby preventing the oil layer from solidifying. The provision of multiple gas injection pipes 622 ensures uniform heating of the water in treatment chamber 11, improving heating efficiency.

[0039] Furthermore, in some possible embodiments, the outlet height of the gas injection member 62 is lower than the filter structure 2 in the processing chamber 11 in which it is located, that is, it is located below the filter plate, and is preferably connected to the bottom end of the corresponding processing chamber 11. On the one hand, it can ensure that the hot steam or heated gas can fully contact the water body, thereby improving the heating efficiency. On the other hand, the steam or hot gas can generate an upward airflow in the wastewater. The rising bubbles can act on the filter plate 21 to perform backwashing, causing a certain disturbance to the impurities on the filter plate 21, helping to loosen the impurities attached to the filter plate 21, and at the same time avoid clogging of the filter plate, further improving the cleaning efficiency. At the same time, the rising airflow can also promote the circulation of the water body in the processing chamber 11, so that the suspended matter in the water body is more evenly distributed in the processing chamber 11, which is beneficial to the subsequent filtration and cleaning process.

[0040] Furthermore, in some possible embodiments, the outlet of each gas injection pipe 622 is provided with a multi-porous nozzle, which can divide the gas into small bubbles to increase the gas-liquid contact area. A gas injection valve 623 is also provided on the gas conduit 621 or the gas injection pipe 622. The gas injection valve 623 is preferably a one-way valve that controls the opening and closing of the gas injection pipe 622 to prevent wastewater from backflowing into the gas heating box 61.

[0041] Furthermore, to prevent excessive bubble turbulence from causing overdispersion of the oil layer and thus impacting subsequent oil-water separation, in this embodiment, both the gas velocity of the gas injection pipe 622 and the injection intensity of the porous injection head are adjustable. Furthermore, a porous baffle 22 is positioned below the filter plate 21. The pores of the porous baffle 22 are larger than those of the filter plate 21 above it. The baffle 22 does not filter impurities but rather serves to slow the velocity of the rising bubbles generated by the gas injection pipe 622, ensuring uniform distribution of the bubbles within the processing chamber 11. This further prevents excessive bubble turbulence from causing overdispersion of the oil layer.

[0042] The heating structure 6 can operate with intermittent air supply, meaning it turns on and off at set intervals. This intermittent air supply allows for periodic heating of the water within the treatment tank 1, saving energy while effectively preventing oil deterioration or excessive volatilization that can occur due to continuous high-temperature heating. In this intermittent air supply mode, the heating structure 6 automatically adjusts its operating state based on a preset time period.

[0043] In order to facilitate gas discharge, an exhaust device is provided above the filter plate 21. The exhaust device includes an exhaust pipe, etc. One end of the exhaust pipe is connected to the interior of the processing box 1, and the other end extends to the outside of the processing box 1. It can be connected to a gas purification device or a circulating heating device to discharge the gas in the processing box 1.

[0044] In some possible embodiments, a plurality of gas injection pipes 622 are evenly distributed radially on the outer wall of the processing box 1 to ensure that the water in the processing box 1 can be evenly heated.

[0045] Alternatively, multiple gas injection pipes 622 are arranged in a spiral ring configuration and rise sequentially, forming a predetermined angle with the treatment tank 1. The gas ejected from each gas injection pipe 622 forms a spiral upward airflow within the treatment tank 1. This arrangement not only helps evenly heat the water within the treatment tank 1 but also further enhances the water disturbance, promoting the uniform distribution of suspended solids and improving wastewater treatment efficiency. Furthermore, the spiral upward airflow evenly disturbs impurities on the filter plate 21, helping to more thoroughly loosen any adhering impurities, further enhancing cleaning efficiency.

[0046] In other embodiments, several air injection pipes 622 are respectively arranged on the left side and the front end of the processing box 1. The left pipe is horizontal to the right, and the front pipe is vertical to the rear. The water inlet direction is at a 90° angle. Turbulence is formed by jet collision, which can further increase the disturbance of the water body and improve the heating efficiency.

[0047] Preferably, in this embodiment, each treatment chamber 11 in the treatment box 1 is composed of two parts: a square box body 101 and a circular box body 102. The square box body 101 is located above the circular box body 102. The square box body 101 is used to install the isolation structure 3 and connect the suction structure 4. The isolation plate 31 is slidably connected to the square box body 101, and the suction pipe 42 of the suction structure 4 is connected to the interior of the square box body 101. The circular box body 102 is used to install the heating structure 6 and the filtering structure 2. The heating structure 6 is connected to the bottom end of the circular box body 102, and the filter plate 21 is installed on the top of the inner wall of the circular box body 102, so that the heating structure 6 can inject air into the treatment chamber 11 in a ring-shaped or spiral shape, which helps the wastewater to form a vortex flow in the treatment chamber 11. In addition, a protruding portion is provided at one end of the square box 101 connected to the suction pipe 42, and the cross-sectional area of the protruding portion gradually decreases from the position close to the suction pipe 42, so that during the suction process, the water in the treatment chamber 11 can flow into the suction pipe 42 more smoothly, avoiding the accumulation and blockage of water during the suction process, and further improving the efficiency of wastewater treatment.

[0048] See also Figure 1 、 Figure 3 and Figure 11 In some possible embodiments, the treatment chamber 11 is further provided with a cleaning structure 7, which includes a cleaning motor 71 and a scraper 72. The cleaning motor 71 is mounted at the bottom of the chamber partition plate 12. The scraper 72 is connected to the output shaft of the cleaning motor 71 and extends upward from the bottom of the treatment chamber 11 to contact the filter plate 21. Driven by the cleaning motor 71, the scraper 72 rotates within the treatment box 1, thereby performing a reciprocating motion on the inner wall of the treatment box 1 to scrape off dirt adhering to the inner wall. The scraped dirt can then enter the next treatment chamber 11 with the sewage. After being filtered by the filter plate 21 in the treatment chamber 11, it is then extracted by the suction structure 4 for centralized treatment.

[0049] Furthermore, the cleaning structure 7 also includes a stirring rod 73, which is arranged in the center of the processing chamber 11 and is connected to the output shaft of the cleaning motor 71. It can rotate under the drive of the cleaning motor 71 to stir the wastewater, thereby promoting the treatment of the wastewater in the graded treatment.

[0050] In a second aspect, an embodiment of the present application further provides a method for graded treatment of production wastewater, including a graded treatment device for production wastewater according to any of the above embodiments. The method for graded treatment of production wastewater includes the following steps: S101: introducing the production wastewater to be treated into the treatment chamber 11 on the top layer of the treatment box 1; S102: The production wastewater is filtered through the filter structure 2, and the solid impurities are retained above the filter structure 2. At the same time, the oil layer floats on the surface of the water above the filter structure 2; S103: Isolating the water above and below the filter structure 2 by blocking the filter surface of the filter structure 2 with the isolation end 301; S104: Start the suction structure 4 to extract the water carrying oil and solid impurities above the filter structure 2; S105: The water in the treatment box 1 flows through the next treatment chamber 11 in turn, and steps S102 to S104 are repeated until the water has been treated by all treatment chambers 11. At the same time, after the sewage in each treatment chamber 11 is emptied, new production wastewater to be treated is introduced for the next round of treatment; S106: The clean water after multi-stage treatment is discharged from the treatment chamber 11 of the bottom layer of the treatment box 1, completing the graded treatment of the production wastewater.

[0051] This application further provides a more specific embodiment to elaborate on the above steps S101-S106, including: Step 1: Introduce the production wastewater to be treated into the uppermost treatment chamber 11 of the treatment box 1 through the water inlet pipe.

[0052] Step 2: After entering the treatment chamber 11, the wastewater is first filtered through the filter plates 21. As the wastewater flows, solid impurities are gradually trapped above the filter plates, forming an impurity layer, while the filtered water continues to flow downward. Meanwhile, the oil layer floats to the surface of the water above the filter plates 21.

[0053] Step 3: After the wastewater flows through the filter plate 21, the isolation drive 32 drives the isolation plate 31 to move along the width of the treatment tank 1, completely isolating the water above the filter plate 21 from the water below. At this point, the water above the filter plate 21 mainly contains oil and solid impurities.

[0054] Simultaneously, heating structure 6 begins operating, heating the water within treatment tank 1 to prevent the oil layer from solidifying. Hot steam or heated gas generated by heating structure 6 enters treatment chamber 11 through gas injection pipe 622, uniformly heating the water. During the heating process, rising bubbles generated by the hot steam or heated gas not only help heat the wastewater but also disturb impurities on filter plate 21, preventing clogging.

[0055] In step four, the suction mechanism 4 is activated to extract the water carrying oil and solid impurities above the filter plate 21. Simultaneously, the scraper mechanism 5 is activated, and the scraper motor 521 drives the scraper plate 511 to slide along the inner wall of the treatment tank 1, pushing the impurities and oil layer adhering to the inner wall toward the suction port. The suction pump is activated to generate negative pressure, drawing the water above the isolation plate 31 into the suction pipe 42, and then out of the treatment tank 1 through the suction pipe 42. During the suction process, the suction valve 43 controls the opening and closing of the suction pipe 42 according to a preset program to ensure that only the water required for treatment is extracted.

[0056] Step 5: After the wastewater in one treatment chamber 11 is treated, the water in the treatment tank 1 flows through the next treatment chamber 11, repeating the filtration, isolation, and pumping process from steps 2 to 4. As the wastewater is treated in each stage, solid impurities and oil are gradually removed, leaving the water cleaner. Simultaneously, after the wastewater in each treatment chamber 11 is drained, new production wastewater is introduced through the inlet pipe for the next round of treatment.

[0057] Step 6: The clean water after multi-stage treatment is discharged from the treatment chamber 11 at the bottom of the treatment box 1, completing the graded treatment of the production wastewater.

[0058] The present invention is provided with a treatment box 1, several filtering structures 2, several isolation structures 3 and a suction structure 4. The filtering structure 2 is used to filter solid impurities in sewage, so that the solid impurities and oil layers in the sewage are retained above the filtering structure 2. The isolation structure 3 can isolate the solid impurities and oil layers from the wastewater below, avoiding the oil layer from flowing into the bottom of the filtering structure 2 during the cleaning process, and at the same time keeping part of the sewage on the filtering structure 2, which is convenient for subsequent cleaning of the filtered impurities; the suction structure 4 is arranged to extract the sewage above the filtering structure 2, so that the solid impurities and oil layers can be extracted together with the sewage. This scheme realizes the synchronous treatment of solid impurities and oil layers in production wastewater, and there is no need to separately set up an oil removal device and impurity cleaning equipment in each stage of treatment. The equipment structure is simplified, the equipment cost is reduced, and the efficiency of wastewater treatment is improved.

[0059] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0060] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0061] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A device for graded treatment of industrial wastewater, characterized in that: include: A treatment box having a plurality of treatment chambers arranged in a height direction, wherein the upper and lower ends of each treatment chamber are respectively provided with a water inlet and a water outlet, and the water outlet of the treatment chamber located above is connected to the water inlet of the treatment chamber located below; A plurality of filter structures are respectively configured in each processing chamber and are located below the water level of the corresponding processing chamber, and the filter structures are used to filter solid impurities; A plurality of isolation structures, each having an isolation end, each of the isolation ends being movably disposed above each of the filter structures for staggering or blocking a communication channel between the filter structure and the water inlet; The suction structure is connected to a plurality of processing chambers located above the filtering structure and is used for sucking the filtered water in the processing chamber.

2. The device for graded treatment of industrial wastewater according to claim 1, characterized in that: A plurality of chamber dividing plates are sequentially arranged in the processing box from top to bottom to divide the interior of the processing box into a plurality of processing chambers, and each of the chamber dividing plates is provided with a connecting pipe and a solenoid valve.

3. The grading treatment device for industrial wastewater according to claim 1, characterized in that: Several of the isolation structures also include an isolation drive member, which is connected to the isolation end and is used to drive the isolation end to slide on the filtering structure so that the isolation end has a first state in which it is staggered with the filtering structure and a second state in which it covers the filtering structure.

4. The grading treatment device for industrial wastewater according to claim 3, characterized in that: The isolation end includes an isolation plate, the filtering structure includes a filter plate, the isolation plate is slidably connected to the filter plate and the inner wall of the processing box, and when the isolation plate is in the second state, the top surface of the filter plate is in contact with the top surface of the isolation plate.

5. The device for graded treatment of industrial wastewater according to claim 4, characterized in that: The isolation plate is provided with a sharp portion at one end away from the isolation drive member, and the cross-sectional area of the sharp portion gradually decreases from one end toward the isolation drive member to the other end. When the isolation end is in the second state, one side of the sharp portion is in contact with the filter plate.

6. The device for graded treatment of industrial wastewater according to claim 1, characterized in that: The grading treatment device for production wastewater also includes a discharge scraping structure, which includes a scraping member arranged on the isolation end, the scraping surface of the scraping member corresponds to the suction port of the suction structure, and its two ends extend along the width direction of the isolation end and are respectively slidably connected to the corresponding two side walls of the treatment box.

7. The device for graded treatment of industrial wastewater according to claim 1, characterized in that: The device for graded treatment of production wastewater further comprises a heating structure, which is connected to the treatment tank and is used to heat the water in the treatment tank.

8. The device for graded treatment of industrial wastewater according to claim 7, characterized in that: The heating structure includes a gas heating box and several gas injection parts. The gas heating box is used to heat the gas. The gas outlet of the gas heating box is connected to the gas inlet ends of several gas injection parts. The gas outlet ends of several gas injection parts are respectively connected to each of the processing chambers to introduce the gas heated by the gas heating box into the processing chamber; and the height of the gas outlet ends of the gas injection parts are lower than the filtering structure in the processing chamber where they are located.

9. The device for graded treatment of industrial wastewater according to claim 8, characterized in that: Each of the gas injection components includes a gas conducting tube and several gas injection tubes. The gas conducting tube is arranged around the outside of the processing box. The several gas injection tubes are arranged in sequence around the outer wall of the processing box. One end of each gas injection tube is connected to the gas conducting tube, and the other end passes through the outer wall of the processing box and extends into the processing chamber.

10. A method for graded treatment of industrial wastewater, characterized in that: The device for graded treatment of production wastewater according to any one of claims 1 to 9 is provided, wherein the graded treatment method for production wastewater comprises the following steps: S101: introducing the production wastewater to be treated into the uppermost treatment chamber of the treatment tank; S102: The production wastewater is filtered through the filter structure, and the solid impurities are retained above the filter structure. At the same time, the oil layer floats on the surface of the water above the filter structure; S103: Isolating the water above and below the filter structure by blocking the filter end on the filter surface of the filter structure; S104: starting the suction structure to extract the water carrying oil and solid impurities above the filtering structure; S105: The water in the treatment tank flows through the next treatment chamber in turn, and steps S102 to S104 are repeated until the water has been treated by all treatment chambers. At the same time, after the sewage in each treatment chamber is emptied, new production wastewater to be treated is introduced for the next round of treatment; S106: The clean water after multi-stage treatment is discharged from the treatment chamber at the bottom of the treatment tank, completing the graded treatment of production wastewater.

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