Sewage treatment and recycling device and method

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment and recycling device and method.The sewage treatment and recycling device comprises a treatment tank, a settling chamber and two sewage treatment chambers are sequentially arranged in the treatment tank in the axis direction of the treatment tank, and the settling chamber and the two sewage treatment chambers are completely separated through vertical partition plates; through holes are formed in the tops of the settling chamber and the two sewage chambers, and two guide plates are symmetrically arranged in the settling chamber. Through the arrangement of the separation assembly, when sewage flows through the inner side of a U-shaped plate under the guidance of a flow guide plate, a magnetic plate located in a protective cover can adsorb and intercept metal residues in the sewage, then the magnetic plate can be far away from the metal residues by extending a hydraulic push rod, and then the suction force to the metal residues is weakened; and finally, the metal residues can fall into the collecting groove through the strip-shaped hole to be recycled, and waste of the metal residues is avoided.

Description

Technical Field

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

[0002] Wastewater treatment refers to the process of purifying wastewater so that it meets the water quality requirements for discharge into a water body or reuse. Wastewater treatment is widely used in various fields such as metallurgy, construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical treatment, catering, etc., and is increasingly entering the daily lives of ordinary people.

[0003] For example, in the existing metallurgical industry, a large amount of water is needed to wash and cool metallurgical metals, and the wastewater generated during the washing and cooling process contains not only sludge, grease, organic impurities and some metal residues. These wastewaters need to be precipitated, filtered, disinfected, and sterilized before they can be discharged. However, during the sedimentation operation, the existing sewage treatment equipment lacks a suitable separation device, which results in the metal residues remaining in the sewage not being well recovered, resulting in a waste of metal residues.

[0004] Therefore, it is necessary to invent a sewage treatment and recycling device and method to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a sewage treatment and recycling device and method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sewage treatment and recycling device, comprising a treatment tank, wherein a sedimentation chamber and two sewage treatment chambers are sequentially arranged in the treatment tank along the axial direction thereof, and the sedimentation chamber and the two sewage chambers are completely separated by a vertical partition, and the tops of the sedimentation chamber and the two sewage chambers are both provided with through holes, and two guide plates are symmetrically arranged in the sedimentation chamber, and the top edges of the two guide plates are hinged with the same rotating shaft, and the two ends of the rotating shaft are respectively rotatably connected to the partition and the inner wall of the side of the sedimentation chamber, and the bottom of the guide plate is symmetrically hinged with two hydraulic push rods, and the bottom ends of the two hydraulic push rods are hinged with the same fixing rod, and the fixing rod The two ends are respectively fixedly connected to the partition and the inner wall of the side of the sedimentation chamber, a separation component is provided on the separated side of the two guide plates, a guide component is provided on the top of the two guide plates, and the top of the two fixed rods is provided with the same collecting trough, one side of the collecting trough is fixedly connected to the partition, and the other side of the collecting trough is plugged into the inner wall of the side of the sedimentation chamber, a collecting hole is opened on the side wall of the treatment tank close to the sedimentation chamber, and a sealing plate is installed at the collecting hole, a sewage pipe is connected to the inner wall of the bottom of the collecting chamber, and a sewage pump is installed on the sewage pipe, a connecting pipe is connected between the two sewage treatment chambers and between the sedimentation chamber and the adjacent sewage treatment chamber, and an extraction pump is installed on the connecting pipe.

[0007] Furthermore, the separation component includes a U-shaped plate that matches the length of the guide plate, and the bottoms of both sides of the U-shaped plate are fixedly connected to the top of the guide plate, the top of the U-shaped plate is fixedly connected to a protective cover, a magnetic plate is arranged in the protective cover, the bottom of the magnetic plate is fixedly connected to a top block, the top block is inserted through the guide plate, a movable plate is slidably inserted on the side of the guide plate away from the rotating shaft, the side away from the guide plate is fixedly connected to a guide rod, and the partition plate and the side inner wall of the sedimentation chamber are opened at positions opposite to the two ends of the guide rod. A guide groove is provided, and the top of the guide groove is inclined in the direction close to the rotating shaft. A top strip is fixedly connected to the top of the movable plate, and the height of the top strip matches the inner height of the U-shaped plate, the length of the top strip matches the width of the movable plate, and the length direction of the top strip is parallel to the side of the movable plate, the bottom of the top strip is higher than the top of the guide plate, and one end of the top strip close to the top block is designed as an inclined surface, the top strip and the top block are located on the same motion trajectory, the side of the top block opposite to the top strip is also designed as an inclined surface, and the inclined surfaces of the two are parallel to each other.

[0008] Furthermore, the guide assembly includes a long strip funnel, the bottom opening of the funnel is located at the top of the rotating shaft, the top opening of the funnel is opposite to the through hole at the top of the deposition chamber, a V-shaped plate is arranged on the inner side of the bottom opening of the funnel, and the opening of the V-shaped plate faces downward, sliders are fixedly connected on both sides of the V-shaped plate, and the two sliders are respectively slidably connected to the inner walls on both sides of the funnel, and long strip notches are arranged at the bottom edges of the front and rear sides of the V-shaped plate, a strip hole is opened on the side of the guide plate close to the rotating shaft, and in the initial state, the strip hole is completely blocked from the top by the side of the V-shaped plate.

[0009] Furthermore, a scraper is fixedly connected to one side of the top strip close to the guide plate, the bottom of the scraper is close to the top of the guide plate, and the thickness of the scraper gradually becomes thicker towards the top strip, and L-shaped scraper strips are symmetrically fixedly connected on both sides of the top of the scraper, the horizontal section of the scraper strip is in contact with the inner wall of the top of the U-shaped plate, the vertical section of the scraper strip is in contact with the inner wall of the side of the U-shaped plate, and the distance between the two scraper strips close to one end of the top strip matches the width of the top block.

[0010] Furthermore, the width of the movable plate matches the width of the U-shaped plate and the length of the top bar, and the projection length of the guide groove in the vertical direction matches the width of the movable plate.

[0011] Furthermore, the width of the collecting groove is greater than the distance between the two strip holes, and the side of the collecting groove away from the partition is inclined downward.

[0012] Furthermore, the bottom of the two movable plates is provided with the same arc-shaped filter plate, and the two sides of the filter plate are respectively fixedly connected to the partition plate and the inner wall of the sedimentation chamber side, and when the guide rod is located at the bottom position of the guide groove, the two movable plates just fit with the top edges of the front and rear sides of the filter plate.

[0013] Furthermore, the length of the V-shaped plate is smaller than the width between the inner walls on both sides of the U-shaped plate, and the bottom edge of the V-shaped plate can contact the top of the guide plate.

[0014] The present invention also provides a method for treating sewage and regenerating the sewage, the method comprising the following steps:

[0015] Step 1: Add the sewage containing steel waste to be treated into the sedimentation chamber from the through hole at the top of the sedimentation chamber, and let the sewage enter the inner side of the U-shaped plate under the guidance of the V-shaped plate;

[0016] Step 2: When the sewage flows through the inner side of the U-shaped plate, the suction force generated by the magnetic plate can adsorb the metal residue in the sewage on the inner wall of the top of the U-shaped plate, while impurities such as silt can flow along the guide plate to the inner wall of the bottom of the sedimentation chamber for sedimentation;

[0017] Step 3: After sedimentation is completed, the sewage in the sedimentation chamber can be pumped into the two sewage treatment chambers through the connecting pipes in sequence by using an extraction pump for sterilization and disinfection. When the sewage treatment meets the standards, the extraction pump can be used to extract the sewage that meets the standards from the through hole at the top of the last sewage treatment chamber;

[0018] Step 4: After the sewage in the sedimentation chamber is pumped out, a sewage pump can be used to discharge the precipitated sludge through a sewage pipe for separate collection and treatment;

[0019] Step 5: After the sludge is discharged, the hydraulic push rod can be started to drive the guide plate to deflect upward. During this process, the magnetic plate can move away from the U-shaped plate under the push of the top bar to the top block, and then the adsorbed metal residue can fall on the guide plate;

[0020] Step 6: When the side of the guide plate close to the rotating shaft is tilted downward, the metal residue can fall into the collecting trough through the strip hole under the action of gravity. Then open the sealing plate and inject clean water into the sedimentation chamber through the through hole at the top of the sedimentation chamber, so that the metal residue gathered at the strip hole position is flushed into the collecting trough and finally collected through the collection hole.

[0021] Technical effects and advantages of the present invention:

[0022] 1. The present invention is provided with a separation component. When the sewage flows through the inner side of the U-shaped plate under the guidance of the guide plate, the magnetic plate located in the protective cover can absorb and intercept the metal residue in the sewage. Then, the magnetic plate and the metal residue can be separated by extending the hydraulic push rod, thereby weakening the suction force on the metal residue. Finally, the metal residue can fall into the collection tank through the strip hole to be recycled, thereby avoiding the waste of metal residue.

[0023] 2. The present invention is provided with a scraper and a scraper strip. When the movable plate is retracted in the guide plate under the action of the guide rod and the guide groove, the scraper and the scraper strip can be driven by the top strip to scrape along the inner wall of the U-shaped plate and the top of the guide plate, thereby scraping the metal residue toward the strip hole more quickly, and also preventing the metal residue from remaining on the inner side of the U-shaped plate and the guide plate;

[0024] 3. The present invention is provided with a filter plate. When the sewage flows into the bottom inner wall of the treatment tank along the top of the movable plate under the guidance of the guide plate, as the water level rises, when the sewage penetrates from the bottom of the filter plate to the space on the top of the filter plate, the filter plate can filter the sludge and impurities in the sewage, so that the sludge and impurities in the sewage can be better deposited on the bottom inner wall of the treatment tank, thereby improving the deposition efficiency of the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a three-dimensional cross-sectional view of the processing tank in the present invention;

[0027] Figure 3 It is a three-dimensional schematic diagram of the partition plate, the guide plate, the hydraulic push rod and the separation assembly in the present invention;

[0028] Figure 4 is a three-dimensional cross-sectional view of a separation component in the present invention;

[0029] Figure 5 is a three-dimensional schematic diagram of the flow guide assembly in the present invention;

[0030] Figure 6 It is a three-dimensional schematic diagram of some separation components, scrapers and scraper strips in the present invention.

[0031] In the figure: 1. treatment tank; 2. partition; 3. guide plate; 4. rotating shaft; 5. hydraulic push rod; 6. fixing rod; 7. separation assembly; 71. U-shaped plate; 72. protective cover; 73. magnetic plate; 74. top block; 75. movable plate; 76. guide rod; 77. guide groove; 78. top strip; 8. guide assembly; 81. funnel; 82. V-shaped plate; 83. slider; 84. notch; 85. strip hole; 9. collecting tank; 10. sealing plate; 11. sewage pipe; 12. sewage pump; 13. connecting pipe; 14. water pump; 15. scraper; 16. scraper strip; 17. filter plate; 18. through hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0033] The present invention provides Figures 1 to 6A sewage treatment and recycling device shown in the figure comprises a treatment tank 1, wherein a sedimentation chamber and two sewage treatment chambers are sequentially arranged in the treatment tank 1 along the axial direction thereof, and the sedimentation chamber and the two sewage chambers are completely separated by a vertical partition 2, and the tops of the sedimentation chamber and the two sewage chambers are both provided with through holes 18, and two guide plates 3 are symmetrically arranged in the sedimentation chamber, and the top edges of the two guide plates 3 are hinged with a same rotating shaft 4, and the two ends of the rotating shaft 4 are respectively rotatably connected to the partition 2 and the side inner wall of the sedimentation chamber, and the bottom of the guide plate 3 is symmetrically hinged with two hydraulic push rods 5, and the bottom ends of the two hydraulic push rods 5 are hinged with a same fixing rod 6, and the two ends of the fixing rod 6 are respectively fixedly connected to the partition 2 and the side inner wall of the sedimentation chamber, and the two guide plates 3 are separated by a distance. A separation component 7 is provided on each side, a guide component 8 is provided on the top of the two guide plates 3, and the same collecting trough 9 is provided on the top of the two fixing rods 6, one side of the collecting trough 9 is fixedly connected to the partition 2, and the other side of the collecting trough 9 is plugged into the side inner wall of the sedimentation chamber, a collecting hole is provided on the side wall of the treatment tank 1 close to the sedimentation chamber, and a sealing plate 10 is installed at the collecting hole, a sewage pipe 11 is connected to the inner wall of the bottom of the collection chamber, and a sewage pump 12 is installed on the sewage pipe 11, a connecting pipe 13 is connected between the two sewage treatment chambers and between the sedimentation chamber and the adjacent sewage treatment chamber, and an extraction pump 14 is installed on the connecting pipe 13, the width of the collecting trough 9 is greater than the distance between the two strip holes 85, and the collecting trough 9 is inclined downward on the side away from the partition 2;

[0034] When treating sewage, the sewage containing steel waste slag to be treated is added into the sedimentation chamber from the through hole 18 at the top of the sedimentation chamber, and then the sewage can enter the separation component 7 at the top of the two guide plates 3 under the guiding action of the guide component 8, and then the separation component 7 can adsorb and intercept the metal residue in the sewage, while the sludge and wastewater can flow along the guide plate 3 to the bottom inner wall of the treatment tank 1, and finally the sludge can be deposited on the bottom inner wall of the treatment tank 1;

[0035] When the sewage is deposited, the sewage in the sedimentation chamber can be pumped into the two sewage treatment chambers through the connecting pipe 13 by the extraction pump 14 for sterilization and disinfection. When the sewage treatment reaches the standard, the extraction pump 14 can be used to extract the sewage from the through hole 18 at the top of the last sewage treatment chamber, thereby completing the sewage treatment. The treated sewage can be reused, thereby saving water.

[0036] After the precipitated sewage in the sedimentation chamber is pumped away, the sewage pump 12 can be used to discharge the precipitated sludge through the sewage pipe 11 for separate collection and treatment. After the sludge is discharged, the hydraulic push rod 5 can be started to drive the guide plate 3 to deflect upward. During this process, the separation component 7 can release the adsorption restriction on the metal residue, so that the adsorbed metal residue can fall on the guide plate 3. As the hydraulic push rod 5 continues to extend, when the side of the guide plate 3 close to the rotating shaft 4 tilts downward, the metal residue can fall into the collection tank 9 through the strip hole 85 under the action of gravity. Then, the sealing plate 10 is opened and clean water is injected into the sedimentation chamber through the through hole 18 at the top of the sedimentation chamber, so that the metal residue gathered at the position of the strip hole 85 is flushed into the collection tank 9, and finally can be collected through the collection hole, thereby realizing the recycling and reuse of the metal residue.

[0037] like Figures 2 to 6 As shown, the separation assembly 7 includes a U-shaped plate 71 that matches the length of the guide plate 3, and the bottoms of both sides of the U-shaped plate 71 are fixedly connected to the top of the guide plate 3, the top of the U-shaped plate 71 is fixedly connected to a protective cover 72, a magnetic plate 73 is arranged in the protective cover 72, the bottom of the magnetic plate 73 is fixedly connected to a top block 74, the top block 74 is inserted through the guide plate 3, and a movable plate 75 is slidably inserted on the side of the guide plate 3 away from the rotating shaft 4, and a guide rod 76 is fixedly connected to the side away from the guide plate 3, and guide grooves 77 are provided on the position opposite to the two ends of the guide rod 76 on the side inner wall of the partition 2 and the sedimentation chamber, and the top of the guide groove 77 is inclined in the direction close to the rotating shaft 4. The top of 75 is fixedly connected with a top bar 78, and the height of the top bar 78 matches the inner height of the U-shaped plate 71, the length of the top bar 78 matches the width of the movable plate 75, and the length direction of the top bar 78 is parallel to the side of the movable plate 75, the bottom of the top bar 78 is higher than the top of the guide plate 3, and the end of the top bar 78 close to the top block 74 is designed with an inclined surface, the top bar 78 and the top block 74 are located on the same motion trajectory, the side of the top block 74 opposite to the top bar 78 is also designed with an inclined surface, and the inclined surfaces of the two are parallel to each other, the width of the movable plate 75 matches the width of the U-shaped plate 71 and the length of the top bar 78, and the projection length of the guide groove 77 along the vertical direction matches the width of the movable plate 75;

[0038] The guide assembly 8 includes a long strip funnel 81, the bottom opening of the funnel 81 is located at the top of the rotating shaft 4, the top opening of the funnel 81 is opposite to the through hole 18 at the top of the deposition chamber, a V-shaped plate 82 is arranged inside the bottom opening of the funnel 81, and the opening of the V-shaped plate 82 faces downward, both sides of the V-shaped plate 82 are fixedly connected with sliders 83, and the two sliders 83 are respectively slidably connected to the inner walls of the two sides of the funnel 81, and the bottom edges of the front and rear sides of the V-shaped plate 82 are provided with long strip notches 84, a strip hole 85 is opened on the side of the guide plate 3 close to the rotating shaft 4, and in the initial state, the strip hole 85 is completely blocked from the top by the side of the V-shaped plate 82, the length of the V-shaped plate 82 is less than the width between the inner walls of the two sides of the U-shaped plate 71, and the bottom edge of the V-shaped plate 82 can contact the top of the guide plate 3;

[0039] After the sewage is passed into the funnel 81 from the through hole 18 at the top of the sedimentation chamber, the sewage can flow into the top of the two guide plates 3 under the guidance of the V-shaped plate 82, and the strip holes 85 are blocked by the V-shaped plate 82, so that the sewage can be prevented from directly flowing into the bottom inner wall of the treatment tank 1 through the strip holes 85. When the sewage flows downward along the guide plate 3, the magnetic plate 73 can generate suction force on the metal residue in the sewage, so that the metal residue can adhere to the top inner wall of the U-shaped plate 71 under the suction force of the magnetic plate 73, and the sewage can flow into the bottom inner wall of the treatment tank 1 along the top of the movable plate 75 for deposition;

[0040] When the precipitated sewage and sludge are pumped out of the treatment tank 1 by the action of the sewage pump 12 and the extraction pump 14 respectively, the hydraulic push rod 5 is started to gradually extend it, and the movable plate 75 can drive the movable plate 75 to deflect upward together under the push of the hydraulic push rod 5. In this process, when the guide plate 3 contacts the bottom of the V-shaped plate 82, the V-shaped plate 82 can move upward under the push of the guide plate 3, so as not to hinder the upward deflection of the guide plate 3, and the guide rod 76 can move along the guide groove 77. With the movement of the guide rod 76, the movable plate 75 can gradually move in the guide plate 3. When the top strip 78 contacts the top block 74 driven by the movable plate 75, the top strip 78 can push the top block 74 upward, so that the magnetic plate 73 can move in the direction away from the U-shaped plate 71 on the inner side of the protective cover 72, and with the gradual movement of the magnetic plate 73, the magnetic plate 73 and the metal plate 73 are The distance between the metal residues gradually increases, thereby weakening the suction of the magnetic plate 73 to the metal residues. When the suction of the magnetic plate 73 to the metal residues is less than its own gravity, the metal residues can fall on the top of the guide plate 3 under the action of gravity. As the guide plate 3 continues to deflect upward, when the guide rod 76 moves to the topmost position of the guide groove 77, the side of the guide plate 3 close to the rotating shaft 4 also tilts downward. At this time, the metal residues can slide along the guide plate 3 to the notch 84 of the V-shaped plate 82 under the action of gravity, and then the metal residues can fall into the collecting tank 9 through the strip hole 85. Then, the sealing plate 10 is opened and clean water is injected into the sedimentation chamber through the through hole 18 at the top of the sedimentation chamber, so that the residual metal residues gathered at the strip hole 85 are flushed into the collecting tank 9. Finally, the remaining metal residues can also be collected through the collecting hole, thereby realizing the recycling and reuse of the metal residues.

[0041] like Figure 4 and Figure 6 As shown, a scraper 15 is fixedly connected to one side of the top strip 78 close to the guide plate 3, the bottom of the scraper 15 is close to the top of the guide plate 3, and the thickness of the scraper 15 gradually becomes thicker in the direction close to the top strip 78, and L-shaped scraper strips 16 are symmetrically fixedly connected to both sides of the top of the scraper 15, the horizontal section of the scraper strip 16 is in contact with the top inner wall of the U-shaped plate 71, the vertical section of the scraper strip 16 is in contact with the side inner wall of the U-shaped plate 71, and the distance between the two scraper strips 16 close to one end of the top strip 78 matches the width of the top block 74;

[0042] By providing the scraper 15 and the scraper strip 16, when the movable plate 75 is retracted into the guide plate 3 under the action of the guide rod 76 and the guide groove 77, the scraper 15 and the scraper strip 16 can be driven by the top strip 78 to scrape along the inner wall of the U-shaped plate 71 and the top of the guide plate 3, thereby scraping the metal residue toward the strip hole 85 more quickly, and at the same time, it can also prevent the metal residue from remaining on the inner side of the U-shaped plate 71 and the guide plate 3.

[0043] like Figure 2 As shown, the bottom of the two movable plates 75 is provided with the same arc-shaped filter plate 17, and the two sides of the filter plate 17 are fixedly connected to the partition plate 2 and the inner wall of the side of the sedimentation chamber respectively, and when the guide rod 76 is located at the bottom end of the guide groove 77, the two movable plates 75 just fit with the top edges of the front and rear sides of the filter plate 17;

[0044] By providing the filter plate 17, when the sewage flows into the bottom inner wall of the treatment tank 1 along the top of the movable plate 75 under the guidance of the guide plate 3, as the water level rises, when the sewage penetrates from the bottom of the filter plate 17 to the space on the top of the filter plate 17, the filter plate 17 can filter the sludge impurities in the sewage, so that the sludge and impurities in the sewage can be better deposited on the bottom inner wall of the treatment tank 1, thereby improving the deposition efficiency of the sewage. In addition, the interception effect of the filter plate 17 on the sludge impurities can also prevent the sludge and impurities from adhering to the hydraulic push rod 5, thereby ensuring the relative cleanliness of the hydraulic push rod 5.

[0045] The present invention also provides a method for treating sewage and regenerating the sewage, the method comprising the following steps:

[0046] Step 1: Add the wastewater containing steel slag to be treated into the sedimentation chamber from the through hole 18 at the top of the sedimentation chamber, and allow the wastewater to enter the inner side of the U-shaped plate 71 under the guidance of the V-shaped plate 82;

[0047] Step 2: When the sewage flows through the inner side of the U-shaped plate 71, the suction force generated by the magnetic plate 73 can adsorb the metal residue in the sewage on the top inner wall of the U-shaped plate 71, while impurities such as silt can flow along the guide plate 3 to the bottom inner wall of the sedimentation chamber for sedimentation;

[0048] Step 3: After the sedimentation is completed, the sewage in the sedimentation chamber can be pumped into the two sewage treatment chambers in sequence through the connecting pipe 13 by using the extraction pump 14 for sterilization and disinfection. When the sewage treatment meets the standards, the extraction pump 14 can be used to extract the sewage that meets the standards from the through hole 18 at the top of the last sewage treatment chamber;

[0049] Step 4: After the sewage in the sedimentation chamber is pumped out after sedimentation, the sewage pump 12 can be used to discharge the precipitated sludge through the sewage pipe 11 for separate collection and treatment;

[0050] Step 5: After the sludge is discharged, the hydraulic push rod 5 can be started to drive the guide plate 3 to deflect upward. During this process, the magnetic plate 73 can move away from the U-shaped plate 71 under the push of the top bar 78 on the top block 74, and then the adsorbed metal residue can fall on the guide plate 3;

[0051] Step six: When the side of the guide plate 3 close to the rotating shaft 4 is tilted downward, the metal residue can fall into the collecting tank 9 through the bar hole 85 under the action of gravity. Then, the sealing plate 10 is opened and clean water is injected into the sedimentation chamber through the through hole 18 at the top of the sedimentation chamber, so that the metal residue gathered at the position of the bar hole 85 is flushed into the collecting tank 9 and finally collected through the collecting hole.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A sewage treatment and recycling device, comprising a treatment tank (1), characterized in that: A sedimentation chamber and two sewage treatment chambers are sequentially arranged in the treatment tank (1) along its axial direction, and the sedimentation chamber and the two sewage chambers are completely separated by a vertical partition (2). The tops of the sedimentation chamber and the two sewage chambers are both provided with through holes (18). Two guide plates (3) are symmetrically arranged in the sedimentation chamber. The top edges of the two guide plates (3) are hinged to the same rotating shaft (4). The two ends of the rotating shaft (4) are respectively rotatably connected to the partition (2) and the inner wall of the side of the sedimentation chamber. The bottom of the guide plate (3) is symmetrically hinged to two hydraulic push rods (5). The bottom ends of the two hydraulic push rods (5) are hinged to the same fixing rod (6). The two ends of the fixing rod (6) are respectively fixedly connected to the partition (2) and the inner wall of the side of the sedimentation chamber. A separation assembly (7) is provided on the side where the two guide plates (3) are separated, a guide assembly (8) is provided on the top of the two guide plates (3), a same collecting trough (9) is provided on the top of the two fixed rods (6), one side of the collecting trough (9) is fixedly connected to the partition (2), and the other side of the collecting trough (9) is plugged into the side inner wall of the sedimentation chamber, a collecting hole is provided on the side wall of the treatment tank (1) close to the sedimentation chamber, and a sealing plate (10) is installed at the collecting hole, a sewage pipe (11) is connected to the inner wall of the bottom of the collection chamber, and a sewage pump (12) is installed on the sewage pipe (11), and a connecting pipe (13) is connected between the two sewage treatment chambers and between the sedimentation chamber and the adjacent sewage treatment chamber, and an extraction pump (14) is installed on the connecting pipe (13).

2. The sewage treatment and recycling device according to claim 1 is characterized in that: The separation assembly (7) comprises a U-shaped plate (71) whose length matches that of the guide plate (3), and the bottoms of both sides of the U-shaped plate (71) are fixedly connected to the top of the guide plate (3), the top of the U-shaped plate (71) is fixedly connected to a protective cover (72), a magnetic plate (73) is arranged in the protective cover (72), the bottom of the magnetic plate (73) is fixedly connected to a top block (74), the top block (74) is inserted through the guide plate (3), a movable plate (75) is slidably inserted on the side of the guide plate (3) away from the rotating shaft (4), the side away from the guide plate (3) is fixedly connected to a guide rod (76), and the partition (2) and the side inner wall of the sedimentation chamber are provided with guide rods (76) at positions directly opposite to the two ends of the guide rod (76). The movable plate (75) is provided with a groove (77), and the top of the guide groove (77) is inclined in a direction close to the rotating shaft (4); the top of the movable plate (75) is fixedly connected with a top strip (78), and the height of the top strip (78) matches the inner height of the U-shaped plate (71); the length of the top strip (78) matches the width of the movable plate (75), and the length direction of the top strip (78) is parallel to the side of the movable plate (75); the bottom of the top strip (78) is higher than the top of the guide plate (3), and the end of the top strip (78) close to the top block (74) is designed as an inclined surface; the top strip (78) and the top block (74) are located on the same motion trajectory; the side of the top block (74) opposite to the top strip (78) is also designed as an inclined surface, and the inclined surfaces of the two are parallel to each other.

3. The sewage treatment and recycling device according to claim 2 is characterized in that: The guide assembly (8) comprises a long strip funnel (81), the bottom opening of the funnel (81) is located at the top of the rotating shaft (4), the top opening of the funnel (81) is opposite to the through hole (18) at the top of the deposition chamber, a V-shaped plate (82) is arranged inside the bottom opening of the funnel (81), and the opening of the V-shaped plate (82) faces downward, both sides of the V-shaped plate (82) are fixedly connected with sliders (83), and the two sliders (83) are respectively slidably connected to the inner walls of both sides of the funnel (81), and the bottom edges of the front and rear sides of the V-shaped plate (82) are both provided with long strip notches (84), and a strip hole (85) is opened on the side of the guide plate (3) close to the rotating shaft (4), and in the initial state, the strip hole (85) is completely blocked from the top by the side of the V-shaped plate (82).

4. The sewage treatment and recycling device according to claim 3 is characterized in that: A scraper (15) is fixedly connected to one side of the top strip (78) close to the guide plate (3); the bottom of the scraper (15) is close to the top of the guide plate (3), and the thickness of the scraper (15) gradually increases in the direction close to the top strip (78); L-shaped scraper strips (16) are symmetrically fixedly connected to both sides of the top of the scraper (15); the horizontal section of the scraper strip (16) is in contact with the inner wall of the top of the U-shaped plate (71); the vertical section of the scraper strip (16) is in contact with the inner wall of the side of the U-shaped plate (71); and the distance between the two scraper strips (16) at one end close to the top strip (78) matches the width of the top block (74).

5. The sewage treatment and recycling device according to claim 4 is characterized in that: The width of the movable plate (75) matches the width of the U-shaped plate (71) and the length of the top strip (78), and the projection length of the guide groove (77) in the vertical direction matches the width of the movable plate (75).

6. The sewage treatment and recycling device according to claim 5 is characterized in that: The width of the collecting groove (9) is greater than the distance between the two strip-shaped holes (85), and the side of the collecting groove (9) away from the partition plate (2) is inclined downward.

7. The sewage treatment and recycling device according to claim 6 is characterized in that: The bottom of the two movable plates (75) is provided with a same arc-shaped filter plate (17), and the two sides of the filter plate (17) are respectively fixedly connected to the partition plate (2) and the inner wall of the side of the sedimentation chamber, and when the guide rod (76) is located at the bottom end position of the guide groove (77), the two movable plates (75) just fit with the front and rear top edges of the filter plate (17).

8. The sewage treatment and recycling device according to claim 7 is characterized in that: The length of the V-shaped plate (82) is smaller than the width between the inner walls on both sides of the U-shaped plate (71), and the bottom edge of the V-shaped plate (82) can contact the top of the guide plate (3).

9. A method for treating sewage using the sewage treatment and recycling device according to claim 8, characterized in that: The method comprises the following steps: Step 1: Add the wastewater containing steel slag to be treated into the sedimentation chamber from the through hole (18) at the top of the sedimentation chamber, and allow the wastewater to enter the inner side of the U-shaped plate (71) under the guidance of the V-shaped plate (82); Step 2: When the sewage flows through the inner side of the U-shaped plate (71), the suction force generated by the magnetic plate (73) can adsorb the metal residue in the sewage onto the inner wall at the top of the U-shaped plate (71), while impurities such as mud and sand can flow along the guide plate (3) to the inner wall at the bottom of the sedimentation chamber for sedimentation; Step 3: After the sedimentation is completed, the sewage that has been precipitated in the sedimentation chamber can be pumped into the two sewage treatment chambers in sequence through the connecting pipe (13) using an extraction pump (14) for sterilization and disinfection. When the sewage treatment meets the standards, the sewage that meets the standards can be extracted from the through hole (18) at the top of the last sewage treatment chamber using an extraction pump (14); Step 4: After the sewage in the sedimentation chamber is pumped out after sedimentation, a sewage pump (12) can be used to discharge the precipitated sludge through a sewage pipe (11) for separate collection and treatment; Step 5: After the sludge is discharged, the hydraulic push rod (5) can be activated to drive the guide plate (3) to deflect upward. During this process, the magnetic plate (73) can move away from the U-shaped plate (71) under the push of the top bar (78) on the top block (74), and then the adsorbed metal residue can fall on the guide plate (3); Step 6: When the guide plate (3) is tilted downward on the side close to the rotating shaft (4), the metal residue can fall into the collecting trough (9) through the strip hole (85) under the action of gravity. Then, the sealing plate (10) is opened and clean water is injected into the sedimentation chamber through the through hole (18) at the top of the sedimentation chamber, so that the metal residue collected at the strip hole (85) is flushed into the collecting trough (9) and finally collected through the collecting hole.

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