A laboratory wastewater solid-liquid separation device and separation method

Abstract

The invention provides a laboratory wastewater solid-liquid separation device and a separation method, which belongs to wastewater treatment technology, and comprises a first filter part, a second filter part, a third filter part, a fourth filter part and a sedimentation part which are connected in sequence; the first filter part comprises a first filter box and a filter screen, the top opening of the first filter box is provided, and the filter screen is covered on the top opening of the first filter box; the second filter part comprises a second filter box, a mixing device is provided on the second filter box, and a delivery component is provided in the second filter box; the third filter part is used for centrifugally filtering coarse particles in the wastewater; the fourth filter part is used for centrifugally settling fine particles and sol in the wastewater; an overflow hole is provided above the side wall of the sedimentation part, and a liquid outlet pipe is connected in the overflow hole. The invention can separate solids and liquids in the wastewater and ensure the health and safety of the staff at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a laboratory wastewater solid-liquid separation device and a separation method. Background Art

[0002] Laboratories use various chemical reagents, biological materials and radioactive substances in scientific research, teaching, medical treatment, testing and other activities. These substances will produce wastewater containing harmful substances during use. With the continuous improvement of environmental protection awareness, the requirements for wastewater discharge are becoming more and more stringent. If laboratory wastewater is discharged directly without treatment, it will cause serious pollution to water bodies and soil, affecting the ecosystem and human health.

[0003] A Chinese patent with authorization announcement number CN201626847U discloses a solid-liquid separation device for wastewater in a biological laboratory, including a separation chamber provided with a cover body, a water integral outlet provided on the cover body of the separation chamber, a plastic bag adapted to its inner cavity provided in the separation chamber, and a microwave generator for heating provided on the side wall or bottom wall of the separation chamber. In actual use, the waste liquid placed in the plastic bag in the separation chamber is heated and evaporated by the microwave generator, and the evaporated water vapor is discharged and collected from the water vapor outlet on the cover body, thereby realizing solid-liquid separation of the wastewater.

[0004] However, the above-mentioned related technologies have the following defects: laboratory wastewater usually contains certain harmful substances. During the evaporation process, these harmful substances will evaporate along with the water vapor, causing a certain impact on the surrounding environment and posing a certain threat to the health and safety of the staff. Summary of the invention

[0005] The object of the present invention is to provide a laboratory wastewater solid-liquid separation device and separation method, which can separate solids and liquids in wastewater while ensuring the health and safety of workers.

[0006] In one aspect, the present invention provides a laboratory wastewater solid-liquid separation device.

[0007] A laboratory wastewater solid-liquid separation device, comprising a first filter part and a second filter part connected in sequence through a pipeline; the first filter part comprises a first filter box and a filter screen, the top opening of the first filter box is provided, and the filter screen is covered on the top opening of the first filter box; the second filter part comprises a second filter box, the second filter box is connected to the first filter box through a first pipeline, a mixing device is provided on the second filter box, and a delivery component for delivering medicines is provided in the second filter box; a scraper is provided in the first filter box for sliding along the horizontal direction, the bottom of the scraper is used to abut against the top of the filter screen, a slide groove is provided in the horizontal direction on the side wall of the first filter box, a slider is provided in the slide groove for sliding, the end of the scraper is connected to the side wall of the slider, and a driving component is provided on the first filter box, the driving component is used to drive the slider to move in the slide groove, a first elastic member is provided on the slider, and the first elastic member is used to drive the scraper to move in the direction of the filter screen; the driving component comprises a driving motor and a screw, the screw is arranged in the slide groove for rotation along the length direction of the slide groove, and the driving motor is fixed It is arranged on the first filter box, the output shaft of the driving motor is connected to the screw transmission, and the slider is threadedly sleeved on the screw; a mounting shaft is rotatably arranged on the side wall of the slider, a gear is coaxially fixedly sleeved on the mounting shaft, a rack is fixedly arranged on the inner wall of the slide groove along the length direction of the slide groove, the gear is meshed with the rack, a cleaning roller is coaxially rotatably arranged at the end of the mounting shaft away from the slider, a plurality of brushes are arranged on the peripheral wall of the cleaning roller, and the brushes are used to abut against the top of the filter screen; the mixing device includes a vertical rod and a stirring rod, and the vertical rod is arranged along the vertical direction The delivery box is rotatably arranged in the second filter box, the stirring rod is fixedly arranged on the vertical rod along the radial direction of the vertical rod, and a rotating motor for driving the vertical rod to rotate is arranged on the second filter box. The delivery assembly includes a delivery box and a baffle, the delivery box is fixedly connected to the second filter box, the top of the delivery box is opened, the top of the vertical rod passes through the bottom wall of the delivery box and is rotatably connected to the delivery box, the baffle is fixedly arranged on the vertical rod, and the bottom of the baffle is used to abut against the bottom of the delivery box, a through delivery port is opened at the bottom of the delivery box, and the baffle is used to close the delivery port.

[0008] Furthermore, the delivery port is arranged in a fan shape, and a plurality of delivery ports are opened along the circumference of the vertical rod. The number of the baffles is adapted to the delivery port. A sealing plate is arranged in the delivery port, the size of the sealing plate is adapted to the delivery port, and a plurality of blanking holes are opened on the sealing plate.

[0009] Furthermore, a strip hole is arranged between the side of the filter screen away from the scraper and the inner wall of the first filter box, and a storage box is arranged in the strip hole. The top opening of the storage box is arranged, and the top opening of the storage box is located below the filter screen. A plurality of filter holes are arranged on the bottom wall and the side wall of the storage box. The storage box is detachably connected to the first filter box, and a limit member is arranged on the first filter box, and the limit member is used to limit the position of the storage box on the first filter box.

[0010] Furthermore, a strip groove is opened on the side wall of the slider in the vertical direction, a strip block is slidably arranged in the strip groove, the first elastic member is arranged in the strip groove, the side wall of the strip block is fixedly connected to the side wall of the scraper, the first elastic member is arranged as a compression spring, one end of the first elastic member abuts against the top of the strip block, and the other end abuts against the inner top wall of the strip groove.

[0011] Furthermore, it also includes a third filter part, a fourth filter part and a sedimentation part; the third filter part is connected to the second filter part by a second pipe, and the third filter part is used for centrifugal filtering of coarse particles in the wastewater; the fourth filter part is connected to the third filter part by a third pipe, and the fourth filter part is used for centrifugal sedimentation of fine particles and sol in the wastewater; the sedimentation part and the fourth filter part are connected by a fourth pipe, an overflow hole is opened above the side wall of the sedimentation part, and a liquid outlet pipe is connected in the overflow hole.

[0012] Furthermore, the third filter part includes a third filter box, in which a first drum is rotatably arranged, a plurality of through holes are opened on the peripheral wall of the first drum, a filter cloth is covered on the inner peripheral wall of the first drum, and a first driving member for driving the first drum to rotate is arranged on the third filter box.

[0013] Furthermore, the fourth filter part comprises a fourth filter box, a second drum is rotatably arranged in the fourth filter box, and a second driving member for driving the second drum to rotate is arranged on the fourth filter box.

[0014] On the other hand, the present invention provides a method for solid-liquid separation of laboratory wastewater.

[0015] A laboratory wastewater solid-liquid separation method, using a laboratory wastewater solid-liquid separation device as described above, comprising the following steps: pouring wastewater into a first filter box, filtering solid waste with a larger volume in the wastewater through a filter screen, and the wastewater falling into the first filter box; the wastewater in the first filter box enters the second filter box through a first pipe, starting a rotating motor to drive the vertical rod to rotate, and at the same time putting a reagent into the second filter box, and stirring and mixing the wastewater in the second filter box for 5-10 minutes; the wastewater in the second filter box enters the third filter box through a second pipe. In the box, start the first driving component to drive the first drum, centrifugally filter the wastewater for 7-21 minutes, and filter the coarse particles in the wastewater; the wastewater in the third filter box enters the fourth filter box through the third pipe, and the second driving component is started to drive the second drum to centrifugally settle the wastewater for 15-30 minutes, so that the fine particles and sol in the wastewater are precipitated; the wastewater in the fourth filter box enters the sedimentation part through the fourth pipe, settles in the sedimentation part for 1-3 hours, and the upper clear liquid of the wastewater in the sedimentation part flows out through the overflow hole and the liquid outlet pipe, thereby realizing the solid-liquid separation of the wastewater.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0017] 1. In actual use, first pour the wastewater into the first filter box, filter the larger debris in the wastewater through the filter net, then the wastewater enters the second filter box, put the agent into the wastewater, adsorb the grease on the surface of the wastewater, then the wastewater enters the third filter box, and filters the coarse particles in the wastewater through centrifugal filtration, and centrifuges through the fourth filter box to settle the fine particles and sol in the wastewater, and finally the wastewater enters the sedimentation part. At this time, the solid waste in the wastewater has been cleaned up, and the upper clear liquid can be collected through the overflow hole;

[0018] 2. Pour wastewater onto the filter screen, and use a scraper to scrape off the solid waste that is locally accumulated on the filter screen to avoid concentrated accumulation of solid waste that may reduce the filtering effect of the filter screen. The scraped waste falls into the receiving box, which can be taken out by releasing the limiter to clean up the waste in the receiving box.

[0019] 3. Put the agent into the delivery box. As the vertical rod rotates, the baffle is driven to rotate. As the baffle rotates, the delivery port is in an intermittent open or closed state, so that the agent can fall into the second filter box in batches. In this process, the vertical rod drives the stirring rod to rotate to fully mix the agent and wastewater, so that the impurities in the wastewater can be more effectively adsorbed and removed, thereby improving the treatment effect of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the invention. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of the first filter part and the second filter part according to an embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic structural diagram of an installation shaft according to an embodiment of the present invention;

[0025] Figure 5 is a cross-sectional view of a mounting block according to an embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the exploded structure of the limiting member according to an embodiment of the present invention;

[0027] Figure 7 for Figure 6 A magnified view of part A in FIG.

[0028] Figure 8 is a schematic diagram of the internal structure of the second filter unit according to an embodiment of the present invention;

[0029] Fig. 9 for Figure 8 A magnified view of part B in FIG.

[0030] Fig.10 It is a structural schematic diagram of a delivery component according to an embodiment of the present invention;

[0031] Fig.11 Schematic diagram of the internal structure of the third filter unit and the fourth filter unit according to an embodiment of the present invention.

[0032] Icons: 1. First filter section; 11. First filter box; 12. Filter screen; 13. Scraper; 14. Slide; 15. Slider; 16. Guide groove; 17. Guide block; 18. First elastic member; 2. Second filter section; 21. First pipeline; 3. Third filter section; 31. Second pipeline; 32. Water pump 1; 33. First drum; 34. Through hole; 35. Filter cloth; 36. First drive member; 4. Fourth filter section; 41. Third pipeline; 42. Water pump 2; 43. Second drum; 44. Second drive member; 45. Water extractor; 5. Sedimentation section; 51. Overflow hole; 52. Liquid outlet pipe; 53. Fourth pipeline; 61. Mixing The invention relates to a combination device; 611, a vertical rod; 612, a stirring rod; 613, a rotating motor; 62, a delivery assembly; 621, a delivery box; 622, a baffle; 623, a delivery port; 624, a sealing plate; 625, a drop hole; 7, a driving assembly; 71, a driving motor; 72, a lead screw; 73, a guide rod; 8, a mounting shaft; 81, a gear; 82, a rack; 83, a cleaning roller; 84, a brush; 85, a mounting block; 86, a strip groove; 87, a strip block; 9, a strip hole; 91, a containing box; 92, a filter hole; 93, a stopper; 94, a stopper groove; 95, a stopper block; 96, a mounting hole; 97, a stopper hole; 98, a tension spring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The following is combined with Figure 1-11 The specific embodiments are further described.

[0036] In one aspect, the present invention provides a laboratory wastewater solid-liquid separation device.

[0037] Reference Figure 1 A laboratory wastewater solid-liquid separation device includes a first filter part 1, a second filter part 2, a third filter part 3, a fourth filter part 4 and a sedimentation part 5 which are sequentially connected through pipelines.

[0038] Among them, refer to Figure 2The first filter part 1 includes a first filter box 11 and a filter screen 12 . The top of the first filter box 11 is opened, and the filter screen 12 covers the top opening of the first filter box 11 .

[0039] like Figure 2 As shown, the second filter part 2 includes a second filter box, which is connected to the first filter box 11 through a first pipe 21. A mixing device 61 is arranged on the second filter box, and a delivery component 62 for delivering medicine is arranged in the second filter box.

[0040] Reference Figure 1 A second pipe 31 is connected between the third filter part 3 and the second filter part 2, and a water pump 32 is arranged on the second pipe 31. The third filter part 3 is used for centrifugally filtering coarse particles in the wastewater.

[0041] Reference Figure 1 A third pipe 41 is connected between the fourth filter part 4 and the third filter part 3 , and a water pump 42 is arranged on the third pipe 41 . The fourth filter part 4 is used for centrifugally settling fine particles and sol in the wastewater.

[0042] Reference Figure 1 A fourth pipe 53 is connected between the sedimentation part 5 and the fourth filtering part 4 , an overflow hole 51 is opened above the side wall of the sedimentation part 5 , and a liquid outlet pipe 52 is connected in the overflow hole 51 .

[0043] Reference Figure 2 , 3 A scraper 13 is provided in the first filter box 11 to slide horizontally, and the bottom of the scraper 13 is used to abut against the top of the filter screen 12. As an embodiment of the present invention, the scraper 13 is tilted as a whole, as shown in FIG. Figure 4 , Figure 5 shown.

[0044] Reference Figure 3 A slide groove 14 is provided on the side wall of the first filter box 11 in the horizontal direction, a slider 15 is slidably provided in the slide groove 14, a guide groove 16 is provided on the side wall of the first filter box 11 away from the slide groove 14, the length of the guide groove 16 is adapted to the slide groove 14, a guide block 17 is slidably provided in the guide groove 16, one end of the scraper 13 is connected to the side wall of the slider 15, and the other end is connected to the side wall of the guide block 17, a driving assembly 7 is provided on the first filter box 11, the driving assembly 7 is used to drive the slider 15 to move in the slide groove 14, a first elastic member 18 is provided on the slider 15, and the first elastic member 18 is used to drive the scraper 13 to move toward the filter screen 12.

[0045] As an embodiment of the present invention, refer to Figure 3The driving assembly 7 includes a driving motor 71 and a lead screw 72. The lead screw 72 is rotatably arranged in the slide groove 14 along the length direction of the slide groove 14. The driving motor 71 is fixedly arranged on the first filter box 11. The output shaft of the driving motor 71 is transmission-connected with the lead screw 72. The slider 15 is threadedly sleeved on the lead screw 72.

[0046] Further, as an embodiment of the present invention, Figure 3 As shown, the lead screw 72 is configured as a reciprocating lead screw, and two mutually connected spiral grooves are provided on the lead screw 72 . As the lead screw 72 rotates, the slider 15 threadably engaged therewith can be driven to perform reciprocating linear motion in the slide groove 14 .

[0047] Reference Figure 3 A guide rod 73 is fixedly arranged in the guide groove 16 along the length direction of the guide groove 16, and the guide block 17 is slidably sleeved on the guide rod 73. The drive motor 71 is started, and the drive motor 71 drives the lead screw 72 to rotate, thereby driving the slider 15 to move in the slide groove 14. As the slider 15 moves, the scraper 13 can be driven to move, thereby driving the guide block 17 to move in the guide groove 16. During the movement of the scraper 13, the side wall of the guide block 17 always abuts against the inner wall of the guide groove 16. At the same time, the guide block 17 is slidably sleeved on the guide rod 73, and the side wall of the slider 15 also abuts against the inner wall of the slide groove 14, so that the scraper 13 can have a good guiding and traction effect.

[0048] Reference Figure 4 A mounting shaft 8 is rotatably provided on the side wall of the slider 15, a gear 81 is coaxially fixedly provided on the mounting shaft 8, a rack 82 is fixedly provided on the inner wall of the slide groove 14 along the length direction of the slide groove 14, the gear 81 is meshed with the rack 82, the thickness of the gear 81 is adapted to the thickness of the rack 82, a cleaning roller 83 is coaxially rotatably provided at the end of the mounting shaft 8 away from the slider 15, a plurality of brushes 84 are provided on the peripheral wall of the cleaning roller 83, and the brushes 84 are used to abut against the top of the filter screen 12.

[0049] As an embodiment of the present invention, refer to Figure 5 A mounting block 85 is fixedly provided on the side wall of the slider 15, and the thickness of the mounting block 85 is adapted to the gear 81 and the rack 82. A strip groove 86 is opened on the side wall of the mounting block 85 in the vertical direction, and a strip block 87 is slidably provided in the strip groove 86. The first elastic member 18 is arranged in the strip groove 86, and the side wall of the strip block 87 is fixedly connected to the side wall of the scraper 13. In addition, as an embodiment of the present invention, the first elastic member 18 is arranged as a compression spring, and one end of the first elastic member 18 abuts against the top of the strip block 87, and the other end abuts against the inner top wall of the strip groove 86.

[0050] Similarly, a vertical groove (not shown in the figure) is opened on the side wall of the guide block 17 in the vertical direction, and a sliding block (not shown in the figure) is slidably arranged in the vertical groove, and the side wall of the sliding block is fixedly connected to the scraper 13.

[0051] Reference Figure 3 , 6 A strip hole 9 is provided between the side of the filter screen 12 away from the scraper 13 and the inner wall of the first filter box 11, and a receiving box 91 is provided in the strip hole 9. The top opening of the receiving box 91 is provided, and the top opening of the receiving box 91 is located below the filter screen 12. A plurality of filter holes 92 are provided on the bottom wall and the side wall of the receiving box 91. The receiving box 91 is detachably connected to the first filter box 11, and a limiting member 93 is provided on the first filter box 11, and the limiting member 93 is used to limit the position of the receiving box 91 on the first filter box 11.

[0052] As an embodiment of the present invention, refer to Figure 6 , 7 A limiting groove 94 is provided on the top of the first filter box 11 in the vertical direction, a limiting block 95 is slidably arranged in the limiting groove 94, the limiting block 95 is fixedly mounted on the side wall of the accommodating box 91, the limiting member 93 is arranged as a latch, a mounting hole 96 is provided on the side wall of the first filter box 11, the limiting member 93 is slidably arranged in the mounting hole 96, the mounting hole 96 is communicated with the limiting groove 94, and a limiting hole 97 for inserting the limiting member 93 is provided on the side wall of the limiting block 95.

[0053] Reference Figure 7 A tension spring 98 is sleeved on the limiting member 93 , one end of the tension spring 98 is fixedly connected to the limiting member 93 , and the other end of the tension spring 98 is fixedly connected to the side wall of the first filter box 11 .

[0054] Wastewater is poured onto the filter 12, and the scraper 13 is used to scrape off the solid waste locally accumulated on the filter 12 to avoid concentrated accumulation of solid waste, which may lead to a decrease in the filtering effect of the filter 12. The scraped waste falls into the receiving box 91, and the receiving box 91 can be taken out by releasing the limiter 93 to clean the waste in the receiving box 91.

[0055] Reference Figure 8 The mixing device 61 includes a vertical rod 611 and a stirring rod 612. The vertical rod 611 is rotatably arranged in the second filter box along the vertical direction. The stirring rod 612 is fixedly arranged on the vertical rod 611 along the radial direction of the vertical rod 611. A rotating motor 613 for driving the vertical rod 611 to rotate is arranged on the second filter box.

[0056] Reference Figure 8 , 9 and Fig.10As an embodiment of the present invention, the delivery assembly 62 includes a delivery box 621 and a baffle 622. A cover plate is provided on the top of the second filter box. The delivery box 621 is fixedly connected to the cover plate. The top of the delivery box 621 is opened. The top of the vertical rod 611 passes through the bottom wall of the delivery box 621 and is rotatably connected to the delivery box 621. The baffle 622 is fixedly provided on the vertical rod 611, and the bottom of the baffle 622 is used to abut against the bottom of the delivery box 621. A through delivery port 623 is provided at the bottom of the delivery box 621, and the baffle 622 is used to close the delivery port 623.

[0057] Reference Figure 8 , 9 and Fig.10 The delivery port 623 is arranged in a fan shape, and a plurality of delivery ports 623 are opened along the circumference of the vertical rod 611. The number of baffles 622 is adapted to the delivery port 623. A sealing plate 624 is arranged in the delivery port 623. The size of the sealing plate 624 is adapted to the delivery port 623, and a plurality of blanking holes 625 are opened on the sealing plate 624.

[0058] As an embodiment of the present invention, two delivery ports 623 are provided, and the two delivery ports 623 are symmetrically arranged at 180°. Two corresponding sealing plates 624 are also provided, and the projection area of ​​the sealing plates 624 in the vertical direction is larger than the area of ​​the delivery port 623.

[0059] Reference Figure 1 and Fig.11 The third filter part 3 includes a third filter box, in which a first drum 33 is rotatably arranged, a plurality of through holes 34 are provided on the peripheral wall of the first drum 33, a filter cloth 35 is covered on the inner peripheral wall of the first drum 33, and a first driving member 36 for driving the first drum 33 to rotate is provided on the third filter box. As an embodiment of the present invention, the first driving member 36 is configured as a motor 1, which is fixedly mounted at the bottom of the third filter box, and the output shaft of the motor 1 is fixedly connected to the bottom of the first drum 33. In actual use, after the wastewater enters the third filter box, the first drum 33 rotates driven by the motor 1, and then the wastewater in the first drum 33 is centrifuged. Since the through holes 34 are provided on the peripheral wall of the first drum 33, the wastewater enters the third filter box through the through holes 34, and the coarse particles in the wastewater form a filter cake on the filter cloth 35, thereby completing the filtration of the coarse particles in the wastewater.

[0060] Reference Figure 1 and Fig.11The fourth filter section 4 includes a fourth filter box, in which a second drum 43 is rotatably arranged, and a second driving member 44 for driving the second drum 43 to rotate is arranged on the fourth filter box. As an embodiment of the present invention, the second driving member 44 is configured as a second motor, and the second motor is fixedly mounted on the bottom of the fourth filter box, and the output shaft of the second motor is fixedly connected to the bottom of the second drum 43. In actual use, after the wastewater enters the fourth filter box, the second drum 43 rotates driven by the second motor, and the rotation speed of the second drum 43 is greater than that of the first drum 33, thereby centrifugally settling the wastewater in the second drum 43. Since the second drum 43 is a non-porous arrangement, as the second drum 43 rotates, the wastewater forms a vortex in the second drum 43, and the liquid level around the vortex is higher than the central liquid level, and the faster the rotation speed of the second drum 43, the higher the height difference, and at the same time, Fig.11 As shown, in the fourth filter box, a water collector 45 is provided at the end of the fourth pipe 53. As the second drum 43 rotates, fine particles and colloids in the wastewater settle to the bottom, and the upper clear liquid is sucked by the water collector 45, thereby completing the filtration of fine particles in the wastewater.

[0061] On the other hand, the present invention also provides a method for solid-liquid separation of laboratory wastewater.

[0062] A method for solid-liquid separation of laboratory wastewater, using a laboratory wastewater solid-liquid separation device as above, comprises the following steps:

[0063] Pour the wastewater into the first filter box 11, filter the larger solid waste in the wastewater through the filter screen 12, and the wastewater falls into the first filter box 11; the wastewater in the first filter box 11 enters the second filter box through the first pipe 21, start the rotating motor 613 to drive the vertical rod 611 to rotate, and at the same time, put the agent into the second filter box, and stir and mix the wastewater in the second filter box for 5-10 minutes; the wastewater in the second filter box enters the third filter box through the second pipe 31, and start the first drive assembly 7 to drive the first drum 3 3. Centrifuge the wastewater for 7-21 minutes to filter the coarse particles in the wastewater; the wastewater in the third filter box enters the fourth filter box through the third pipe 41, and the second drive assembly 7 is started to drive the second drum 43 to centrifuge the wastewater for 15-30 minutes to complete the precipitation of fine particles and sol in the wastewater; the wastewater in the fourth filter box enters the sedimentation part 5 through the fourth pipe, and settles in the sedimentation part 5 for 1-3 hours. The upper clear liquid of the wastewater in the sedimentation part 5 flows out through the overflow hole 51 and the liquid outlet pipe 52, thereby realizing the solid-liquid separation of the wastewater.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laboratory wastewater solid-liquid separation device, characterized in that: The invention comprises a first filter part (1) and a second filter part (2) which are connected in sequence; the first filter part (1) comprises a first filter box (11) and a filter screen (12); the first filter box (11) is provided with a top opening, and the filter screen (12) is covered on the top opening of the first filter box (11); the second filter part (2) comprises a second filter box, the second filter box is connected to the first filter box (11) through a first pipe (21), a mixing device (61) is provided on the second filter box, and a delivery component (62) for delivering medicine is provided in the second filter box; A scraper (13) is slidably arranged in the horizontal direction in the first filter box (11), the bottom of the scraper (13) is used to abut against the top of the filter screen (12), a slide groove (14) is provided on the side wall of the first filter box (11), a slider (15) is slidably arranged in the slide groove (14), the end of the scraper (13) is connected to the side wall of the slider (15), a driving component (7) is arranged on the first filter box (11), the driving component (7) is used to drive the slider (15) to move in the slide groove (14), and a first elastic member (18) is arranged on the slider (15); the driving component (7) comprises a driving motor (71) and a lead screw (72), the lead screw (72) The slide (14) is rotatably arranged in the slide groove (14), the driving motor (71) is fixedly arranged on the first filter box (11), the output shaft of the driving motor (71) is transmission-connected with the lead screw (72), and the slider (15) is threadedly sleeved on the lead screw (72); a mounting shaft (8) is rotatably arranged on the side wall of the slider (15), a gear (81) is coaxially and fixedly sleeved on the mounting shaft (8), a rack (82) is fixedly arranged on the inner wall of the slide groove (14), the gear (81) is meshed with the rack (82), a cleaning roller (83) is coaxially rotatably arranged at one end of the mounting shaft (8) away from the slider (15), and a plurality of brushes (84) are arranged on the peripheral wall of the cleaning roller (83); The mixing device (61) comprises a vertical rod (611) and a stirring rod (612); the vertical rod (611) is rotatably arranged in the second filter box; the stirring rod (612) is fixedly arranged on the vertical rod (611) along the radial direction of the vertical rod (611); a rotating motor (613) for driving the vertical rod (611) to rotate is arranged on the second filter box; the delivery assembly (62) comprises a delivery box (621) and a blocking piece (622); the delivery box (621) is fixedly arranged on the second filter box The top of the delivery box (621) is open, the top of the vertical rod (611) passes through the bottom wall of the delivery box (621) and is rotatably connected to the delivery box (621), the blocking piece (622) is fixedly arranged on the vertical rod (611), and the bottom of the blocking piece (622) is used to abut against the bottom of the delivery box (621), and a through delivery opening (623) is opened at the bottom of the delivery box (621), and the blocking piece (622) is used to close the delivery opening (623); The delivery port (623) is arranged in a fan shape, and a plurality of delivery ports (623) are provided along the circumference of the vertical rod (611). The number of the blocking pieces (622) is adapted to the delivery port (623). A sealing plate (624) is arranged in the delivery port (623), and the size of the sealing plate (624) is adapted to the delivery port (623). A plurality of material dropping holes (625) are provided on the sealing plate (624); A strip hole (9) is provided between a side of the filter screen (12) away from the scraper (13) and an inner wall of the first filter box (11); a receiving box (91) is provided in the strip hole (9); the top of the receiving box (91) is provided with an opening, the top opening of the receiving box (91) is located below the filter screen (12); a plurality of filter holes (92) are provided on the bottom wall and the side wall of the receiving box (91); the receiving box (91) is detachably connected to the first filter box (11); a limiting member (93) is provided on the first filter box (11); the limiting member (93) is used to limit the position of the receiving box (91) on the first filter box (11); Also includes a third filter part, a fourth filter part and a sedimentation part; A second pipe (31) is connected between the third filter section (3) and the second filter section (2), and the third filter section (3) is used for centrifugally filtering coarse particles in the wastewater; a third pipe (41) is connected between the fourth filter section (4) and the third filter section (3), and the fourth filter section (4) is used for centrifugally settling fine particles and sol in the wastewater; a fourth pipe (53) is connected between the settling section (5) and the fourth filter section (4), an overflow hole (51) is provided above the side wall of the settling section (5), and a liquid outlet pipe (52) is connected inside the overflow hole (51); the third filter section (3) comprises a third filter box A first drum (33) is rotatably arranged in the third filter box, a plurality of through holes (34) are provided on the peripheral wall of the first drum (33), a filter cloth (35) is covered on the inner peripheral wall of the first drum (33), and a first driving member (36) for driving the first drum (33) to rotate is provided on the third filter box; the fourth filter part (4) comprises a fourth filter box, a second drum (43) is rotatably arranged in the fourth filter box, a second driving member (44) for driving the second drum (43) to rotate is provided on the fourth filter box, and the rotation speed of the second drum (43) is greater than the rotation speed of the first drum (33).

2. A laboratory wastewater solid-liquid separation device according to claim 1, characterized in that: A strip groove (86) is provided on the side wall of the slider (15) in the vertical direction, a strip block (87) is slidably provided in the strip groove (86), the first elastic member (18) is provided in the strip groove (86), the side wall of the strip block (87) is fixedly connected to the side wall of the scraper (13), the first elastic member (18) is provided as a compression spring, one end of the first elastic member (18) abuts against the top of the strip block (87), and the other end abuts against the inner top wall of the strip groove (86).

3. A method for solid-liquid separation of laboratory wastewater, using a solid-liquid separation device for laboratory wastewater as claimed in claim 1 or 2, characterized in that: The following steps are involved: Pour the waste water into the first filter box (11), filter the solid waste with a larger volume in the waste water through the filter net (12), and the waste water falls into the first filter box (11); The wastewater in the first filter box (11) enters the second filter box through the first pipe (21), the rotating motor (613) is started to drive the vertical rod (611) to rotate, and the reagent is added into the second filter box at the same time, and the wastewater in the second filter box is stirred and mixed for 5-10 minutes; The wastewater in the second filter box enters the third filter box through the second pipe (31), and the first drive assembly (7) is started to drive the first drum (33) to centrifugally filter the wastewater for 7-21 minutes to filter the coarse particles in the wastewater; The wastewater in the third filter box enters the fourth filter box through the third pipe (41), and the second drive assembly (7) is started to drive the second drum (43) to centrifuge the wastewater for 15-30 minutes to complete the precipitation of fine particles and sol in the wastewater; The wastewater in the fourth filter box enters the sedimentation section (5) through the fourth pipe (53), and settles in the sedimentation section (5) for 1-3 hours. The upper clear liquid of the wastewater in the sedimentation section (5) flows out through the overflow hole (51) and the liquid outlet pipe (52), thereby achieving solid-liquid separation of the wastewater.

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