A staged treatment apparatus and method for production wastewater

Abstract

The application discloses a kind of production wastewater's grading treatment device and method, production wastewater's grading treatment device, comprising: processing box, several filtering structures, several isolation structures and suction structure, several filtering structures are respectively one-to-one corresponding configuration in each processing cavity, and below the water level of corresponding processing cavity, filtering structure is used to filter solid impurities;Several isolation structures all have isolation end, each isolation end is movably arranged above each filtering structure, for staggered or blocking the communication channel between filtering structure and water inlet;Suction structure is communicated with several processing cavities above filtering structure, for suctioning water body filtered in processing cavity;The application realizes the synchronous processing of solid impurities and oil layer in production wastewater, without separately setting oil removal device and cleaning impurities equipment in each level processing process, reduces equipment cost, and improves the efficiency of wastewater treatment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a graded treatment device and method for industrial wastewater. Background Technology

[0002] Wastewater treatment refers to the process of purifying wastewater to meet water quality standards for discharge into specific water bodies or for recycling. Wastewater treatment is widely used in construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscaping, healthcare, catering, and many other fields, and is gradually becoming an indispensable part of daily life for ordinary people. Wastewater treatment equipment is responsible for treating domestic sewage and industrial wastewater to prevent damage to the environment, especially aquatic ecosystems. Because 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] CN108862761A discloses a low-energy-consumption domestic sewage graded treatment device, including a main body and a sedimentation tank. An aeration tank is located on the left side of the main body, with a first drainage 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 located on the rear side. A quartz filter layer is arranged inside the filter tank. A main shaft is installed inside the aeration tank, and water-turning plates are welded to the outside of the rotating rod. The outside of the aeration tank is electroplated with a black chrome coating. A protective shell is installed on the rear side of the main body, and a photovoltaic inverter and a battery pack are installed inside the protective shell. This solution achieves graded treatment of sewage through a three-stage filtration system, including a three-stage filtration tank, an aeration tank, a filter tank, and a sedimentation tank.

[0004] During the wastewater feeding stage and intermediate treatment process, each stage will have a certain amount of solid impurities or flocculated solid particles. Therefore, existing equipment is equipped with filtration and cleaning equipment to deal with these solid impurities. However, in the staged treatment of oily wastewater, each stage needs to be equipped with a dedicated oil removal device as well as equipment for filtration and cleaning of impurities, which increases the complexity and cost of the equipment and makes the operation more cumbersome. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a graded treatment device and method for production wastewater. This invention solves the technical problem that in the graded treatment of oily wastewater in existing wastewater treatment devices, each stage requires a dedicated oil removal device and equipment for filtering and cleaning impurities, which increases the complexity and cost of the equipment and makes operation more cumbersome.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a graded treatment device and method for industrial wastewater. The graded treatment device for industrial wastewater includes: a treatment tank, several filter structures, several isolation structures, and a suction structure. The treatment tank has several treatment chambers arranged along its height, each with an inlet and an outlet at its upper and lower ends, respectively. The outlet of the upper treatment chamber is connected to the inlet of the lower treatment chamber. Several filter structures are respectively and correspondingly arranged within each treatment chamber, and are positioned below the water level of the respective chamber. The filter structures are used to filter solid impurities. Several isolation structures each have an isolation end, each movably positioned above a specific filter structure to offset or block the communication channel between the filter structure and the inlet. The suction structure is connected to several treatment chambers located above the filter structures and is used to suction the filtered water from the treatment chambers.

[0008] In some embodiments, a plurality of chamber partition plates are arranged sequentially from top to bottom inside the processing box to divide the interior of the processing box into a plurality of processing chambers, and each chamber partition plate is provided with a connecting pipe and a solenoid valve.

[0009] In some embodiments, each of the isolation structures further includes an isolation drive member connected to the isolation end for driving the isolation end to slide on the filter structure, so that the isolation end has a first state of being staggered from the filter structure and a second state of covering the filter structure.

[0010] In some embodiments, the isolation end includes an isolation plate, the filter 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 a second state, the top surface of the filter plate is in contact with the top surface of the isolation plate.

[0011] In some embodiments, the isolation plate has 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.

[0012] In some embodiments, the wastewater classification treatment device further includes a discharge scraping structure, which includes a scraping component disposed on the isolation end. The scraping surface of the scraping component 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 attached to and slidably connected to the corresponding side walls of the treatment box.

[0013] In some embodiments, the wastewater grading treatment device further includes a heating structure connected to the treatment tank for heating the water in the treatment tank.

[0014] In some embodiments, the heating structure includes a gas heating box and a plurality of gas injection components. The gas heating box is used to heat gas. The outlet of the gas heating box is connected to the inlet of the plurality of gas injection components. The outlet of the plurality of gas injection components is respectively connected to each of the processing chambers for introducing the gas heated by the gas heating box into the processing chamber. The outlet of each gas injection component is lower than the filter structure in its respective processing chamber.

[0015] In some embodiments, each gas injection device includes a gas conduit and a plurality of gas injection pipes. The gas conduit is arranged around the outside of the processing chamber, and the plurality of gas injection pipes are arranged sequentially around the outer side wall of the processing chamber. One end of each gas injection pipe is connected to the gas conduit, and the other end passes through the outer side wall of the processing chamber and extends into the processing cavity.

[0016] Secondly, the present invention provides a method for graded treatment of industrial wastewater, comprising the graded treatment apparatus for industrial wastewater as described in any one of the above claims, wherein the method for graded treatment of industrial wastewater comprises the following steps:

[0017] S101: The production wastewater to be treated is introduced into the uppermost treatment chamber of the treatment tank;

[0018] S102: Production wastewater is filtered through a filtration structure. Solid impurities are retained above the filtration structure, while an oil layer floats on the surface of the water above the filtration structure.

[0019] S103: The water above and below the filter structure is isolated by the isolation end on the filter surface of the filter structure;

[0020] S104: Activate the suction structure to extract the water carrying oil and solid impurities above the filter structure;

[0021] S105: The water in the treatment tank flows through the next treatment chamber in sequence, and steps S102 to S104 are repeated until the water has been treated by all the 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.

[0022] S106: The clean water after multi-stage treatment is discharged from the bottom treatment chamber of the treatment tank, completing the graded treatment of production wastewater.

[0023] Compared with existing technologies, the graded treatment device and method for industrial wastewater provided by this invention, by setting up a treatment tank, several filtration structures, several isolation structures, and a suction structure, allows the filtration structures to filter solid impurities in the wastewater, keeping solid impurities and oil layers above the filtration structures. The isolation structures can isolate solid impurities and oil layers from the wastewater below, preventing oil layers from flowing into the bottom of the filtration structures during the cleaning process, while keeping some wastewater on the filtration structures for easy subsequent cleaning of the filtered impurities. The suction structure extracts the wastewater above the filtration structures, allowing solid impurities and oil layers to be extracted along with the wastewater. This solution achieves simultaneous treatment of solid impurities and oil layers in industrial wastewater, eliminating the need for separate oil removal devices and impurity cleaning equipment in each stage of treatment, simplifying the equipment structure, reducing equipment costs, and improving wastewater treatment efficiency. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the graded treatment device for production wastewater provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the main view of the graded treatment device for production wastewater provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the main cross-sectional structure of the graded treatment device for production wastewater provided in an embodiment of the present invention;

[0027] Figure 4 This is a partial structural diagram of the installation of the treatment box in the graded treatment device for production wastewater provided in an embodiment of the present invention;

[0028] Figure 5 This is a partial three-dimensional structural diagram of the installation of the isolation plate and treatment box of the graded treatment device for production wastewater provided in an embodiment of the present invention;

[0029] Figure 6 This is a side view of the heating structure of the graded treatment device for production wastewater provided in an embodiment of the present invention.

[0030] Figure 7 This is a top view of the heating structure of an embodiment of the graded treatment device for production wastewater provided in this invention.

[0031] Figure 8 This is a top view of the heating structure of another embodiment of the graded treatment device for production wastewater provided in this invention.

[0032] Figure 9 This is a schematic diagram of the installation structure of the scraper plate and the isolation plate of the graded treatment device for production wastewater provided in this embodiment of the invention;

[0033] Figure 10 This is a top cross-sectional view of the discharge scraping structure of the graded treatment device for production wastewater provided in this embodiment of the invention.

[0034] Figure 11 This is a cross-sectional schematic diagram of the cleaning structure of the graded treatment device for production wastewater provided in an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Processing box; 11. Processing chamber; 12. Chamber partition plate; 13. Connecting pipe; 14. Solenoid valve; 15. Sealing frame; 101. Square box; 102. Circular box;

[0037] 2. Filter structure; 21. Filter plate; 22. Porous baffle;

[0038] 3. Isolation structure; 301. Isolation end; 31. Isolation plate; 311. Sharp part; 32. Isolation drive component; 33. Mounting bracket;

[0039] 4. Suction structure; 41. Transfer box; 42. Suction pipe; 43. Suction valve; 44. First connecting pipe; 45. Second connecting pipe;

[0040] 5. Material discharge and scraping structure; 51. Scraper component; 511. Scraper plate; 52. Scraper drive component; 521. Scraper motor; 522. First bevel gear set; 523. First transmission rod; 524. Second bevel gear set; 525. Transmission screw; 526. Threaded sleeve;

[0041] 6. Heating structure; 61. Gas heating box; 62. Gas injection component; 621. Gas conduit; 622. Gas injection pipe; 623. Gas injection valve;

[0042] 7. Clean the structure; 71. Clean the motor; 72. Scraper; 73. Stirring rod. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0044] To address the technical problem that wastewater treatment devices require dedicated oil removal equipment and filtration and impurity cleaning devices at each stage of the graded treatment process for oily wastewater, increasing equipment complexity and cost, and making operation more cumbersome, this invention provides a graded treatment device and method for industrial wastewater. This method achieves simultaneous treatment of solid impurities and oil layers in industrial wastewater, eliminating the need for separate oil removal devices and impurity cleaning devices at each stage of treatment. This simplifies the equipment structure, reduces equipment costs, and improves wastewater treatment efficiency.

[0045] Please see Figures 1 to 11 In a first aspect, embodiments of this application provide a graded treatment device for industrial wastewater, comprising: a treatment tank 1, a plurality of filter structures 2, a plurality of isolation structures 3, and a suction structure 4. The treatment tank 1 has a plurality of treatment chambers 11 arranged along the height direction. Each treatment chamber 11 has an inlet and an outlet at its upper and lower ends, respectively. The outlet of the upper treatment chamber 11 is connected to the inlet of the lower treatment chamber 11. The plurality of filter structures 2 are respectively arranged in each treatment chamber 11 and are located below the water level of the corresponding treatment chamber 11. The filter structures 2 are used to filter solid impurities. The plurality of isolation structures 3 each have an isolation end 301. Each isolation end 301 is movably arranged above each filter structure 2 to offset or block the communication channel between the filter structure 2 and the inlet. The suction structure 4 is connected to the plurality of treatment chambers 11 located above the filter structures 2 and is used to suction the filtered water in the treatment chambers 11.

[0046] In this device, the treatment tank 1 has several treatment chambers 11 arranged along the height direction and connected sequentially. These treatment chambers 11 are used to treat production wastewater in stages. Several filter structures 2 are respectively arranged in each treatment chamber 11, which can effectively filter solid impurities in the wastewater. After being filtered by the filter structures 2, the solid impurities in the wastewater are retained above the filter structures 2. At the same time, the filter structures 2 are positioned below the water level of the corresponding treatment chamber 11, so that the oil layer in the wastewater also floats above the filter structures 2. The isolation structure 3 isolates the solid impurities and oil layer from the wastewater below, preventing the oil layer from flowing in during the cleaning process. Below the filter structure 2, some wastewater is retained above the filter structure 2, allowing impurities to be extracted along with the wastewater during subsequent suction, thus facilitating the cleaning of impurities and oil. The filter ends of several isolation structures 3 can be staggered or blocked above the filter structure 2, so that when it is necessary to clean solid impurities and oil layers on the filter structure 2, the solid impurities and oil layers 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, realizing the simultaneous treatment of oil layers and solid impurities in the production wastewater and improving the efficiency of wastewater treatment.

[0047] It should be noted that, in some embodiments, each treatment chamber 11 may be equipped with different levels of wastewater treatment components to meet the treatment needs of wastewater with different concentrations. The wastewater treatment components include, but are not limited to, sedimentation devices, biological treatment devices, and chemical treatment devices. The treatment chamber 11 may also be equipped with corresponding dosing ports, etc. Through the coordinated work of each level of devices, pollutants in the wastewater can be removed step by step to ensure that the wastewater meets the discharge standards or reuse requirements after treatment.

[0048] Please see Figures 1 to 4 In this embodiment, a plurality of chamber partition plates 12 are arranged sequentially from top to bottom inside the treatment tank 1 to divide the interior of the treatment tank 1 into a plurality of treatment chambers 11. Each chamber partition plate 12 is provided with a connecting pipe 13 and a solenoid valve 14. The connecting pipe 13 is used to connect adjacent treatment chambers 11, and the solenoid valve 14 is used to control the opening and closing of the connecting pipe 13. When the wastewater has been treated in one treatment chamber 11, the wastewater can be allowed to flow into the next treatment chamber 11 for further treatment by opening the corresponding solenoid valve 14 through the connecting pipe 13.

[0049] Please see Figures 1 to 5 In some possible embodiments, each of the isolation structures 3 further includes an isolation drive 32. The isolation drive 32 is installed outside the processing box 1 and can be a cylinder, hydraulic cylinder, ball screw structure, etc. It can drive the isolation end 301 to move horizontally. The upper surface of the filter structure 2 forms a filter surface. The drive end of the isolation drive 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 that is staggered from the filter surface of the filter structure 2, and a second state that covers the filter surface of the filter structure 2.

[0050] In the first state, the isolation end 301 is staggered from the filter surface of the filter structure 2, allowing wastewater to flow freely through the filter structure 2 for normal filtration. When it is necessary to clean solid impurities and oil layers on the filter structure 2, the isolation end 301 can be driven to slide to the second state by the isolation drive 32. In this state, the isolation end 301 completely covers the filter surface of the filter structure 2, completely isolating solid impurities and oil layers from the wastewater below, thereby improving cleaning efficiency.

[0051] In one embodiment, the isolation drive 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 extends through one side of the processing box 1 into the processing box 1. The filter 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. Both sides contact the side walls of the processing box 1 and are 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 impurities and oil layer on the water surface, the extension end of the cylinder extends, causing the isolation plate 31 to slide along the inner wall of the treatment tank 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 activated. The suction structure 4 is connected to the treatment chamber 11 located above the filter structure 2 in the treatment tank 1 through a pipe, and the water carrying solid impurities and oil layer is extracted from the treatment tank 1 for centralized treatment. After cleaning is completed, the extension end of the cylinder retracts, causing the isolation plate 31 to slide back to the first state along the original path. At this time, the wastewater in the treatment tank 1 can continue to flow through the filter structure 2 for filtration.

[0052] Furthermore, in order to prevent wastewater leakage, in some possible embodiments, a sealing frame 15 is provided on one side of the treatment tank 1 at a position corresponding to the isolation plate 31. The isolation plate 31 is always partially inside the sealing frame 15 in the first and second states. A waterproof ring is provided on the inner side of the sealing frame 15. The waterproof ring is in close contact with the isolation plate 31, thereby ensuring that wastewater will not leak out from the gap between the isolation plate 31 and the treatment tank 1 during the sliding process of the isolation plate 31.

[0053] Furthermore, in some possible embodiments, the end of the isolation plate 31 facing away from the isolation drive member 32 is provided with a sharp portion 311. The cross-sectional area of ​​the sharp portion 311 gradually decreases from the end facing the isolation drive member 32 to the other end. When the isolation end 301 is in the second state, one side of the sharp portion 311 is in contact with the filter plate 21. The provision of the sharp portion 311 helps to better cut into impurities or oil layers that may be attached to the filter plate 21 when the isolation plate 31 changes from the first state position to the second state, making it easier to scrape off stubborn impurities or oil layers attached to the filter plate 21 during the cleaning process, thereby improving cleaning efficiency.

[0054] It should be noted that in other possible embodiments, the filter structure 2 and the isolation structure 3 can also adopt other designs to adapt to different wastewater treatment needs. For example, the isolation structure 3 can be manually driven or other types of isolation structures can be used to replace the isolation plate 31. Furthermore, in this solution, the pore size of the filter plates in each treatment chamber 11 is not limited. The pore sizes of multiple filter plates can be arranged sequentially from top to bottom, or the required pore size can be set according to the actual treatment needs of each layer to meet the requirements of step-by-step filtration of wastewater.

[0055] Please see Figures 1 to 3 To achieve the extraction of solid impurities and oil layers, in some possible embodiments, the extraction structure 4 includes a transfer box 41, an extraction pump, extraction pipes 42, a first connecting pipe 44, and a second connecting pipe 45. The extraction pump is located inside the transfer box 41 and is used to generate negative pressure to extract the filtered water from the treatment chamber 11. Multiple sets of extraction pipes 42 are provided, each equipped with an extraction valve 43. One end of each extraction 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 extraction pump, used to guide the water from the treatment chamber 11 into the extraction pump. The extraction valve 43 is used to control the opening and closing of the extraction pipes 42, so as to selectively extract water from different treatment chambers 11 as needed.

[0056] 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 operating state of the suction pump and the opening and closing of each suction valve 43 can be precisely controlled according to actual needs, thereby achieving precise suction of water 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 that treatment chamber 11 to open, and simultaneously start the suction pump to extract the water in the treatment chamber 11 for centralized treatment. After cleaning is completed, the control unit then controls the suction valve 43 to close, stopping the suction process. This control method not only improves the efficiency of wastewater treatment but also ensures the accuracy of wastewater treatment.

[0057] In addition, in order to further improve the efficiency of wastewater treatment, the suction intensity of the suction structure 4 in this embodiment is adjustable. According to the wastewater treatment requirements and the liquid level of the wastewater in the treatment chamber 11, the suction intensity of the suction structure 4 can be adjusted to achieve precise control of the wastewater suction rate.

[0058] 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 through a separate suction structure 4 to improve the flexibility and efficiency of wastewater treatment. Each suction structure 4 can work independently, performing suction operations according to the actual situation of the wastewater in the corresponding treatment chamber 11.

[0059] Please see Figure 4 , Figure 9 and Figure 10 To further reduce the residue of filtered impurities and oil during the suction process, in some possible embodiments, a discharge scraping structure 5 is also 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. The scraping surface of the scraper 51 corresponds to the suction port of the suction structure 4, and its two ends extend along the width direction of the isolation end 301 and are respectively attached to and slidably connected to the corresponding 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 relative to the suction port of the suction structure 4 on the inner wall of the processing box 1. 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.

[0060] In one embodiment, the scraping component 51 includes a scraper plate 511, and the scraping drive component 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 and rear ends of the scraper plate 511 are both abutted against the inner wall of the processing box 1. 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 and rear ends of the scraper plate 511. 526 is connected to the front and rear ends of the scraper plate 511 respectively. 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 screws 525 through the second bevel gear set 524 to transmit the driving force of the scraper motor 521 and drive the transmission screws 525 to rotate. When the scraper motor 521 starts, 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 respectively. The two first transmission rods 523 then drive the two transmission screws 525 to rotate through the second bevel gear set 524 respectively. Since the two threaded sleeves 526 are threadedly connected to the two transmission screws 525 respectively, when the transmission screws 525 rotate, the threaded sleeves 526 will move synchronously along the axial direction of the transmission screws 525, thereby driving the scraper plate 511 to reciprocate on the inner wall of the processing box 1. The front and rear ends of the scraper plate 511 are both in contact with the inner wall of the processing box 1. Therefore, during the reciprocating motion of the scraper plate 511, it can push the impurities and oil layer attached to the inner wall of the processing box 1 toward the suction port, so as to extract the impurities and oil layer from the processing box 1.

[0061] Please see Figure 1 , Figure 2 , Figure 4 , Figures 6 to 8 To prevent oil layer solidification, in this embodiment, the wastewater grading treatment device further includes a heating structure 6, which is connected to the treatment tank 1 and used to heat the water inside the treatment tank 1. The heating structure 6 can be located outside or inside the treatment tank 1, and can be an electric heating wire, steam heater, etc. By heating the water inside the treatment tank 1, the water temperature is increased, thereby preventing oil layer solidification. The heating structure 6 can be connected to a temperature sensor installed inside the treatment tank 1. The temperature sensor monitors the water temperature inside the treatment tank 1 in real time, and automatically adjusts the heating power of the heating structure 6 according to changes in water temperature to maintain the water temperature inside the treatment tank 1 within a set range.

[0062] Preferably, in this embodiment, the heating structure 6 includes a gas heating box 61 and several gas injection components 62. Each gas injection component 62 includes a gas conduction pipe 621 and several gas injection pipes 622. The gas heating box 61 has a steam heater or heating element for generating hot steam or heating gas. The outlet of the gas heating box 61 is connected to the inlet of several gas injection components 62, and the outlet of several gas injection components 62 is 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 conduction pipe 621 is an annular pipe, which is arranged around the outside of the processing box 1. Several gas injection pipes 622 are arranged sequentially around the outer wall of the processing box 1. One end of each gas injection pipe 622 is connected to the gas conduction pipe 621, and the other end passes through the outer wall of the processing box 1 and extends into the processing chamber 11. When the heating structure 6 is activated, the steam heater or heating element generates hot steam or heating gas. The hot steam or heating gas enters the air injection pipe 622 through the gas conduit 621 and is ejected through the air outlet to heat the water in the treatment tank 1, thereby increasing the water temperature and preventing the oil layer from solidifying. The use of multiple air injection pipes 622 ensures that the water in the treatment chamber 11 is heated evenly, improving heating efficiency.

[0063] Furthermore, in some possible embodiments, the outlet height of the gas injection component 62 is lower than that of the filter structure 2 within its treatment chamber 11, i.e., located below the filter plate, and preferably connected to the bottom of the corresponding treatment chamber 11. On the one hand, this ensures that the hot steam or heating gas can fully contact the water, improving 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, causing backflow and disturbing the impurities on the filter plate 21, helping to loosen the impurities attached to the filter plate 21, while preventing the filter plate from clogging, further improving cleaning efficiency. At the same time, the upward airflow can also promote water circulation within the treatment chamber 11, making the suspended solids in the water more evenly distributed within the treatment chamber 11, which is beneficial for subsequent filtration and cleaning processes.

[0064] Furthermore, in some possible embodiments, each gas injection pipe 622 is provided with a multi-hole nozzle at its outlet end. The multi-hole nozzle can divide the gas into fine bubbles to increase the gas-liquid contact area. A gas injection valve 623 is also provided on the gas conduction pipe 621 or the gas injection pipe 622. The gas injection valve 623 is preferably a one-way valve, used to control the opening and closing of the gas injection pipe 622 to prevent wastewater from flowing back into the gas heating box 61.

[0065] Furthermore, to avoid excessive oil layer dispersion due to excessive bubble turbulence velocity, which would affect the subsequent oil-water separation effect, the air outlet velocity of the air injection pipe 622 and the spray intensity of the multi-hole nozzle are adjustable in this embodiment. In addition, a multi-hole baffle 22 is provided below the filter plate 21. The pores of the multi-hole baffle 22 are larger than those of the filter plate 21 above it. It does not filter impurities, but is used to slow down the flow velocity of the rising bubbles generated by the air injection pipe 622, so that the bubbles are evenly distributed in the processing chamber 11, further preventing excessive oil layer dispersion due to excessive bubble turbulence velocity.

[0066] The heating structure 6 can operate in an intermittent air intake mode, meaning it turns on and off at set time intervals. This intermittent air intake allows for periodic heating of the water in the treatment tank 1, saving energy and effectively preventing oil layer deterioration or excessive volatilization caused by continuous high-temperature heating. In this intermittent air intake mode, the heating structure 6 can automatically adjust its operating status according to a preset time period.

[0067] To facilitate gas discharge, an exhaust device is provided above the filter plate 21. The exhaust device includes an exhaust pipe, one end of which is connected to the inside of the treatment box 1, and the other end extends to the outside of the treatment box 1. It can be connected to a gas purification device or a circulating heating device to discharge the gas in the treatment box 1.

[0068] In some possible embodiments, several air injection pipes 622 are radially and evenly distributed on the outer side wall of the treatment tank 1 to ensure that the water in the treatment tank 1 can be heated evenly.

[0069] In another configuration, multiple air injection pipes 622 are arranged in a spiral ring pattern and rise sequentially, forming a certain angle with the treatment tank 1. The gas ejected from each air injection pipe 622 can form a spiral upward airflow within the treatment tank 1. This arrangement not only helps to uniformly heat the water within the treatment tank 1 but also further enhances the turbulence effect on the water, promoting the uniform distribution of suspended solids and improving wastewater treatment efficiency. Simultaneously, the spiral upward airflow can also generate more uniform disturbance to the impurities on the filter plate 21, helping to loosen the impurities adhering to the filter plate 21 more thoroughly and further improving cleaning efficiency.

[0070] In other embodiments, several air injection pipes 622 are respectively arranged on the left side and the front end of the treatment tank 1. The left pipe is horizontal to the right and the front pipe is vertical to the rear. The water inlet directions are at a 90° angle to each other. Turbulence is formed by jet collision, which can further increase the disturbance of the water and improve the heating efficiency.

[0071] Preferably, in this embodiment, each treatment chamber 11 in the treatment box 1 consists of two parts: a square box 101 and a circular box 102, with the square box 101 located above the circular box 102. The square box 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 101, and the suction pipe 42 of the suction structure 4 communicates with the interior of the square box 101. The circular box 102 is used to install the heating structure 6 and the filter structure 2. The heating structure 6 is communicated with the bottom end of the circular box 102, and the filter plate 21 is installed on the top of the inner wall of the circular box 102, facilitating the heating structure 6 to inject air into the treatment chamber 11 in a ring or spiral shape, which helps the wastewater to form a vortex flow in the treatment chamber 11. In addition, a protruding part is provided at one end of the square box 101 connected to the suction pipe 42. The cross-sectional area of ​​the protruding part gradually decreases from the position close to the suction pipe 42, so that the water in the treatment chamber 11 can flow into the suction pipe 42 more smoothly during the suction process, avoiding the accumulation and blockage of water during the suction process, and further improving the efficiency of wastewater treatment.

[0072] Please see Figure 1 , Figure 3 and Figure 11 In some possible embodiments, the processing 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 installed at the bottom of the chamber partition plate 12, and the scraper 72 is connected to the output shaft of the cleaning motor 71, extending upward from the bottom of the processing chamber 11 to contact the filter plate 21. Driven by the cleaning motor 71, the scraper rotates within the processing chamber 1, thereby reciprocating on the inner wall of the processing chamber 1 to scrape away dirt adhering to the inner wall. The scraped dirt can enter the next processing chamber 11 with the wastewater, be filtered by the filter plate 21 within the processing chamber 11, and then be extracted by the suction structure 4 for centralized treatment.

[0073] Furthermore, the cleaning structure 7 also includes a stirring rod 73, which is located in the center of the treatment chamber 11 and connected to the output shaft of the cleaning motor 71. The stirring rod 73 can rotate under the drive of the cleaning motor 71 to stir the wastewater, thereby promoting the treatment of wastewater in the graded treatment process.

[0074] Secondly, embodiments of this application also provide a method for graded treatment of industrial wastewater, including a wastewater graded treatment apparatus as described in any of the above embodiments. The wastewater graded treatment method includes the following steps:

[0075] S101: The production wastewater to be treated is introduced into the uppermost treatment chamber 11 of the treatment tank 1;

[0076] S102: Production wastewater is filtered through filter structure 2. Solid impurities are retained above filter structure 2, while oil layer floats on the surface of the water above filter structure 2.

[0077] S103: The water above and below the filter structure 2 is isolated by the isolation end 301 on the filter surface of the filter structure 2.

[0078] S104: Activate suction structure 4 to extract the water carrying oil and solid impurities above filter structure 2;

[0079] S105: The water in the treatment tank 1 flows through the next treatment chamber 11 in sequence, 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.

[0080] S106: The clean water after multi-stage treatment is discharged from the lowest treatment chamber 11 of the treatment tank 1, completing the graded treatment of production wastewater.

[0081] This application further provides a more specific embodiment to illustrate the above steps S101-S106 in detail, including:

[0082] Step 1: The production wastewater to be treated is introduced into the uppermost treatment chamber 11 of the treatment tank 1 through the inlet pipe.

[0083] Step 2: After the wastewater enters the treatment chamber 11, it is first filtered through the filter plate 21. As the wastewater flows, solid impurities are gradually trapped above the filter plate, forming an impurity layer, while the filtered water continues to flow downwards. At the same time, an oil layer floats on the surface of the water above the filter plate 21.

[0084] 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 direction of the treatment tank 1, completely isolating the water above the filter plate 21 from the water below. At this time, the water above the filter plate 21 mainly contains oil and solid impurities.

[0085] Simultaneously, heating structure 6 begins operation to heat the water in treatment tank 1, preventing the oil layer from solidifying. The hot steam or heating gas generated by heating structure 6 enters treatment chamber 11 through injection pipe 622, uniformly heating the water. During the heating process, the rising bubbles generated by the hot steam or heating gas not only help heat the wastewater but also disturb impurities on filter plate 21, preventing filter plate clogging.

[0086] Step four: The suction structure 4 is activated to extract the water carrying oil and solid impurities above the filter plate 21. Simultaneously, the discharge scraping structure 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 attached to the inner wall towards the suction port. The suction pump starts, generating negative pressure to draw the water above the isolation plate 31 into the suction pipe 42, and then discharges it from 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 that needs to be treated is extracted.

[0087] Step 5: After the wastewater in one treatment chamber 11 is treated, the water in treatment tank 1 flows sequentially through the next treatment chamber 11, repeating the filtration, isolation, and suction processes described in steps 2 to 4. With each stage of wastewater treatment, solid impurities and oil layers are gradually removed, resulting in cleaner water. Simultaneously, after the wastewater in each treatment chamber 11 is emptied, new production wastewater is introduced through the inlet pipe for the next round of treatment.

[0088] Step 6: The clean water after multi-stage treatment is discharged from the lowest treatment chamber 11 of the treatment tank 1, completing the graded treatment of production wastewater.

[0089] This invention comprises a treatment tank 1, several filter structures 2, several isolation structures 3, and a suction structure 4. The filter structures 2 filter solid impurities in wastewater, keeping solid impurities and oil layers above them. The isolation structures 3 separate solid impurities and oil layers from the wastewater below, preventing oil layers from flowing below the filter structures 2 during cleaning, while also keeping some wastewater on the filter structures 2 for easy subsequent cleaning of the filtered impurities. The suction structure 4 extracts the wastewater above the filter structures 2, allowing solid impurities and oil layers to be extracted along with the wastewater. This solution achieves simultaneous treatment of solid impurities and oil layers in production wastewater, eliminating the need for separate oil removal devices and impurity cleaning equipment in each stage of treatment. This simplifies the equipment structure, reduces equipment costs, and improves wastewater treatment efficiency.

[0090] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0091] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for the fractional treatment of production wastewater, characterized in that The application relates to a production wastewater grading treatment device. The device comprises a treatment box with a plurality of treatment cavities arranged along the height direction, each of the treatment cavities is provided with a water inlet at the upper end and a water outlet at the lower end, the water outlet of the upper treatment cavity is communicated with the water inlet of the lower treatment cavity; A plurality of filter structures are arranged in the treatment cavities one by one and below the water level of the corresponding treatment cavities, and the filter structures are used for filtering solid impurities; A plurality of isolation structures are provided with isolation ends, each of the isolation ends is movably arranged above the corresponding filter structure, and the isolation ends are used for staggering or blocking the communication channel between the filter structure and the water inlet; Each of the isolation structures further comprises an isolation driving member, the isolation driving member is installed outside the treatment box and connected with the isolation end, and is used for driving the isolation end to slide on the filter structure, so that the isolation end has a first state of staggered arrangement with the filter structure and a second state of covering the filter structure; The isolation end comprises an isolation plate, the filter structure comprises a filter plate, and the treatment box is provided with a sealing outer frame at the position corresponding to the isolation plate on one side; when the isolation plate is in the first state and the second state, part of the isolation plate is arranged in the sealing outer frame; the inner side of the sealing outer frame is provided with a waterproof ring, and the waterproof ring is in close contact with the isolation plate; one end of the isolation plate away from the isolation driving member is provided with a sharp part, the cross-sectional area of the sharp part gradually decreases from one end to the other end, and when the isolation end is in the second state, one side of the sharp part is in contact with the filter plate; A suction structure is connected with a plurality of treatment cavities above the filter structure and is used for sucking the filtered water in the treatment cavities; A material discharging and bottom scraping structure comprises a scraping member arranged on the isolation end, a scraping surface of the scraping member corresponds to a suction port of the suction structure, and the two ends of the scraping member extend along the width direction of the isolation end and are respectively connected with the opposite two side walls of the treatment box in a sliding mode.

2. The apparatus for the stepwise treatment of production wastewater according to claim 1, characterized in that A plurality of chamber dividing plates are arranged in the treatment box from top to bottom, so as to divide the inner part of the treatment box into a plurality of treatment cavities, and a communication pipe and an electromagnetic valve are arranged on each of the chamber dividing plates.

3. The apparatus for the stepwise treatment of production wastewater according to claim 1, characterized in that, The isolation plate is in sliding connection with the filter plate and the inner wall of the treatment 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.

4. The apparatus for the stepwise treatment of production wastewater according to claim 1, characterized in that, The production wastewater grading treatment device further comprises a heating structure connected with the treatment box and used for heating the water in the treatment box.

5. The apparatus for the stepwise treatment of production wastewater according to claim 4, characterized in that The heating structure comprises a gas heating box and a plurality of gas injection members, the gas heating box is used for heating gas, a gas outlet of the gas heating box is connected with a gas inlet end of each of the gas injection members, a gas outlet end of each of the gas injection members is connected with each of the treatment cavities, and the gas injection members are used for guiding the heated gas in the treatment cavities; and the height of the gas outlet end of each of the gas injection members is lower than that of the filter structure in the treatment cavity.

6. The apparatus for the stepwise treatment of production wastewater according to claim 5, characterized in that Each of the gas injection members comprises a gas conducting pipe and a plurality of gas injection pipes, the gas conducting pipe is arranged around the outside of the processing box, and the plurality of gas injection pipes are arranged in sequence around the outer wall of the processing box, one end of each of the gas injection pipes is communicated with the gas conducting pipe, and the other end penetrates the outer wall of the processing box and extends into the processing cavity.

7. A method for the stepwise treatment of production wastewater, characterized in that The production wastewater grading treatment method comprises the following steps: S101: introducing the production wastewater to be treated into the uppermost processing cavity of the processing box; S102: filtering the production wastewater through the filtering structure, and retaining the solid impurities above the filtering structure, and at the same time, the oil layer floats on the surface of the water above the filtering structure; S103: isolating the water above and below the filtering structure by the isolation end; S104: starting the suction structure to suck out the water above the filtering structure carrying the oil and the solid impurities; S105: the water in the processing box flows through the next processing cavity in sequence, and the steps S102 to S104 are repeated until the water is treated through all the processing cavities, and at the same time, after the sewage in each processing cavity 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 lowermost processing cavity of the processing box, and the grading treatment of the production wastewater is completed.

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