Multi-stage wastewater zero discharge process and device

Abstract

The invention discloses a multi-stage wastewater zero discharge process and device, and relates to the field of wastewater treatment.The device specifically comprises a screening box, a treatment box is arranged on one side of the bottom of the screening box, a purification box is arranged on one side of the bottom of the treatment box, and a screening plate is fixedly installed in the screening box; a segmented drainage mechanism and an interval lifting and pushing mechanism are arranged between the screening box and the treatment box as well as between the treatment box and the purification box; according to the wastewater treatment device, a plurality of wastewater treatment box bodies are arranged in an up-down staggered manner, and then the drainage guide groove is intermittently opened through the lifting and pushing plate, so that the wastewater treatment box bodies can discharge treated water at first and then introduce new wastewater, the treated wastewater and untreated wastewater are effectively separated, wastewater treatment is prevented from being influenced, and the wastewater treatment efficiency is improved. Meanwhile, in the process of discharging the treated wastewater, generated sediments and floaters are pushed away and isolated through a separation net plate and a turning plate, and the situation that the treated water is synchronously brought out to affect the wastewater treatment effect is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and more particularly to a multi-stage wastewater zero-discharge process and device. Background Art

[0002] Sewage contains a large number of pollutants, such as pathogen pollutants, aerobic pollutants, chemical toxic pollutants, petroleum pollutants and radioactive pollutants. Therefore, direct discharge of untreated sewage will pose a huge threat to the environment, ecology and human health, and cause serious economic losses.

[0003] For example, utility model patent CN219823951U discloses a zero-discharge equipment for reclaimed water based on wastewater treatment. The equipment uses a waste residue recovery device to directly discharge the sludge and waste residue generated during treatment into a septic tank to avoid pollution caused by discharge into the environment. The equipment also uses a coarse filtration device, a stirring device, an ozone device, and an MBR device to perform multi-stage treatment on the reclaimed water. The reclaimed water can be taken at any time through different outlet pipes, thus realizing the treatment of the reclaimed water according to its purpose and avoiding waste of resources. However, the aforementioned patent documents only provide for continuous wastewater treatment. In actual use, there is no separate and orderly wastewater treatment structure. That is, the wastewater treatment process is continuous and mutually influential. As a result, the wastewater in the front section cannot be separated from the wastewater in the back section after treatment. As a result, the treated wastewater cannot be disconnected in time and is affected again, which greatly reduces the effect of zero discharge of wastewater. At the same time, there is also a lack of a structure to separate the sediment and floating objects generated during the wastewater treatment process, resulting in the sediment and floating objects being simultaneously taken out as the wastewater continuously enters the next section after further treatment, further affecting the wastewater treatment effect. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-stage wastewater zero discharge process and device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a multi-stage wastewater zero-discharge device, comprising a screening box, a treatment box provided on one side of the bottom of the screening box, a purification box provided on one side of the bottom of the treatment box, a sieve plate fixedly installed inside the screening box, and a segmented drainage mechanism and an interval lifting and pushing mechanism provided between the screening box and the treatment box and between the treatment box and the purification box; The segmented drainage mechanism includes drainage guide grooves fixedly mounted on the top of one side of the screening box and the processing box, respectively. The drainage guide grooves are arranged in a door shape. The outer walls of the two drainage guide grooves are connected to a discharge groove, and the two discharge grooves respectively penetrate the outer walls of the processing box and the purification box. The inner wall of the drainage guide groove is provided with a piston plate, and the piston plate is arranged in a horizontal state. The outer wall of the piston plate is in contact with the inner wall of the drainage guide groove. Pull rods are fixedly installed on both sides of the bottom of the piston plate. The two pull rods are arranged symmetrically with each other. The bottoms of the two pull rods are respectively fixed with the same belt plates, and the two same belt plates are arranged in a horizontal state.

[0006] In a preferred embodiment, a first tooth plate is fixedly installed on one side of the two belt plates, and the two first tooth plates are slidably installed on the outer wall of the screening box. The two first tooth plates are arranged in a vertical state, and a gear is engaged on one side of the two first tooth plates, and the two gears are rotatably installed on the outer wall of the processing box. A second tooth plate is engaged on the other side of the two gears, and the two second tooth plates are slidably installed on the outer wall of the processing box. The two second tooth plates are staggered with the two first tooth plates.

[0007] In a preferred embodiment, the interval lifting and pushing mechanism includes a motor fixedly mounted on the top of the processing box, a reciprocating threaded rod is provided at the bottom of the motor, the reciprocating threaded rod is arranged in a vertical state, the outer wall of the reciprocating threaded rod is threadedly connected with a lifting and pushing plate, the lifting and pushing plate is slidably mounted on the outer wall of the processing box, and the lifting and pushing plate is arranged in an inverted T shape.

[0008] In a preferred embodiment, lifting rods are rotatably installed on both sides of the lifting and pushing plate. The two lifting rods are symmetrically arranged with each other, and limit blocks are provided at the bottom of the two lifting rods. The two limit blocks are fixedly installed on both sides of the lifting and pushing plate.

[0009] In a preferred embodiment, a tension plate is provided on the top of the two lifting rods, the tension plates and the lifting rods are arranged in an interlaced manner, the tension plates are arranged in a horizontal state, a retaining block is rotatably installed on one side of the tension plate, the retaining block is fixedly installed on the outer wall of the second tooth plate, a support spring is fixedly installed on the top of the tension plate, the support spring is fixedly installed on the outer wall of the retaining block, a clamping block is provided on the top of the retaining block, and the clamping block is fixedly installed on the outer walls of the processing box and the purification box.

[0010] In a preferred embodiment, a weight plate is fixedly mounted on the bottom outer walls of the two second tooth plates, and the weight plate is arranged in a horizontal state.

[0011] In a preferred embodiment, the inner wall of the processing box is provided with a partition mechanism, which includes two telescopic rods hinged to the outer wall of the bottom of the lifting plate, and the two telescopic rods are symmetrically arranged. A sliding plate is hinged on one side of the two telescopic rods, and the sliding plate is slidably installed on the top of the processing box. A partition plate is fixedly installed on the bottom of the sliding plate, and the partition plate is arranged in a vertical state. The outer wall of the partition plate is in contact with the inner wall of the processing box.

[0012] In a preferred embodiment, the bottom of the partition plate is hinged with a pull strip, the bottom of the pull strip is hinged with a flap, the flap is set in an inclined state, the bottom of the flap is rotatably installed with a debris guide plate, the debris guide plate is fixedly installed at the bottom of the processing box, and the top of the debris guide plate is set in an inclined state.

[0013] The present invention also proposes a multi-stage wastewater zero discharge process, which specifically includes separating treated and untreated wastewater and isolating the generated sediment and floating matter. The relevant steps are as follows: Step 1: The motor drives the reciprocating threaded rod to rotate so that the lifting and pushing plate moves up. The lifting and pushing plate drives the lifting rods on both sides to lift the tension plate and the retaining block and move up, driving the second toothed plate to move up synchronously. Step 2: When the lifting plate moves up, it drives the two telescopic rods to make the sliding plate slide. The sliding plate drives the screen plate to slide synchronously to push the floating objects in the treatment box backwards. When the screen plate moves, it drives the pull bar to lift the flap upwards, and the sediment accumulated on the guide plate is pushed backwards by force. Step 3: The second toothed plate between the treatment box and the purification box moves upward, driving the gear to rotate, causing the first toothed plate to push the belt plate downward. The belt plate drives the pull rod downward to pull open the piston plate, causing the negative pressure in the drainage guide groove to guide the treated water in the treatment box into the purification box; Step 4: The retaining block moves up to the limit position of the card block so that the retaining block is stationary. The tension plate on the retaining block is subjected to force and compresses the support spring to rotate, breaking away from the lifting and squeezing of the lifting rod; Step 5: The second tooth plates on both sides move downward through the heavy pressure plate, and the piston plate moves upward again to close the drainage guide groove between the processing box and the purification box; Step 6: The lifting and pushing plate continues to move upward to open the drainage guide groove between the screening box and the treatment box, and then the new wastewater in the screening box is sent to the treatment box for treatment.

[0014] The technical effects and advantages of the present invention are as follows: 1. The present invention is achieved by arranging a segmented drainage mechanism and an interval lifting and pushing mechanism, arranging multiple wastewater treatment boxes in an upper and lower staggered manner, and then intermittently opening the drainage guide groove through the lifting and pushing plates, so that the box for post-treatment wastewater can first discharge the treated water and then introduce new wastewater, thereby effectively separating the treated and untreated wastewater to avoid affecting the wastewater treatment.

[0015] 2. At the same time, a separation mechanism is also set up to assist. In the process of discharging the treated wastewater, the generated sediment and floating objects are pushed away and isolated through the partition plate and the flap, so as to avoid the treated water carrying them out at the same time and affecting the treatment effect of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a front view of the present invention.

[0018] Figure 3 It is a partial vertical sectional view of the present invention.

[0019] Figure 4 It is a partial cross-sectional view of the segmented drainage mechanism in the present invention.

[0020] Figure 5 It is a structural schematic diagram of the intermediate spacer lifting and pushing mechanism of the present invention.

[0021] Figure 6 It is a partial cross-sectional view of the intermediate spacer lifting and pushing mechanism of the present invention.

[0022] Figure 7 It is a vertical cross-sectional view of the partition mechanism in the present invention.

[0023] The accompanying drawings are marked as follows: 1. Screening box; 2. Processing box; 3. Purification box; 4. Sieve plate; 5. Segmented drainage mechanism; 51. Drainage guide groove; 52. Discharge groove; 53. Piston plate; 54. Pull rod; 55. Belt plate; 56. First tooth plate; 57. Gear; 58. Second tooth plate; 6. Interval lifting and pushing mechanism; 61. Motor; 62. Reciprocating threaded rod; 63. Lifting and pushing plate; 64. Lifting rod; 65. Limiting block; 66. Tension plate; 67. Retaining block; 68. Support spring; 69. Block; 610. Heavy pressure plate; 7. Isolation mechanism; 71. Telescopic rod; 72. Sliding push plate; 73. Partition mesh plate; 74. Pull bar; 75. Flip plate; 76. Guide plate. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1: For wastewater treatment structures that are not separated and carried out in an orderly manner, that is, the wastewater treatment process is continuous and affects each other, which results in the wastewater in the front section being unable to be separated from the wastewater in the back section after treatment, so that the treated wastewater cannot be disconnected in time and is affected again, greatly reducing the zero discharge effect of the wastewater. To solve this problem, the following technical solution is proposed: Refer to the instruction manual Figure 1-Figure 7 , a multi-stage wastewater zero discharge device, such as Figure 1 and Figure 2As shown, it includes a screening box 1, a processing box 2 is provided on one side of the bottom of the screening box 1, a purification box 3 is provided on one side of the bottom of the processing box 2, a sieve plate 4 is fixedly installed inside the screening box 1, and a segmented drainage mechanism 5 and an interval lifting and pushing mechanism 6 are provided between the screening box 1 and the processing box 2 and between the processing box 2 and the purification box 3; like Figure 3 and Figure 4 As shown, the segmented drainage mechanism 5 includes drainage guide grooves 51 fixedly mounted on the top of one side of the screening box 1 and the processing box 2, respectively. The drainage guide grooves 51 are arranged in a door shape. The outer walls of the two drainage guide grooves 51 are connected to the discharge grooves 52. The two discharge grooves 52 pass through the outer walls of the processing box 2 and the purification box 3 respectively. The inner wall of the drainage guide groove 51 is provided with a piston plate 53, which is arranged in a horizontal state. The outer wall of the piston plate 53 is in contact with the inner wall of the drainage guide groove 51. Pull rods 54 are fixedly installed on both sides of the bottom of the piston plate 53. The two pull rods 54 are symmetrically arranged. The bottoms of the two pull rods 54 are respectively fixed with band plates 55. The two band plates 55 are arranged in a horizontal state. Drainage guide grooves 51 are provided between the screening box 1 and the processing box 2 and between the processing box 2 and the purification box 3. During use, the drainage guide groove 51 located between the treatment box 2 and the purification box 3 first drives the pull rod 54 downward through the same belt plate 55 to pull open the piston plate 53. The piston plate 53 causes the negative pressure in the drainage guide groove 51 to introduce the treated water in the treatment box 2 into the purification box 3. Then the drainage guide groove 51 located between the screening box 1 and the treatment box 2 is opened to send new wastewater into the treatment box 2 for treatment, thereby effectively separating the treated and untreated wastewater to avoid affecting the wastewater treatment.

[0026] like Figure 3 and Figure 4 As shown, one side of the two same-belt plates 55 is respectively fixedly mounted with a first tooth plate 56, and the two first tooth plates 56 are slidably mounted on the outer wall of the screening box 1, and the two first tooth plates 56 are arranged in a vertical state, and one side of the two first tooth plates 56 is engaged with a gear 57, and the two gears 57 are rotatably mounted on the outer wall of the processing box 2, and the other side of the two gears 57 is engaged with a second tooth plate 58, and the two second tooth plates 58 are slidably mounted on the outer wall of the processing box 2, and the two second tooth plates 58 are staggered with the two first tooth plates 56, and the second tooth plate 58 moves upward to drive the gear 57 to rotate so that the first tooth plate 56 pushes the same-belt plate 55 downward to move downward.

[0027] like Figure 5 and Figure 6As shown, the interval lifting and pushing mechanism 6 includes a motor 61 fixedly installed on the top of the processing box 2, and a reciprocating threaded rod 62 is provided at the bottom of the motor 61. The reciprocating threaded rod 62 is arranged in a vertical state. The outer wall of the reciprocating threaded rod 62 is threadedly connected with a lifting and pushing plate 63. The lifting and pushing plate 63 is slidably installed on the outer wall of the processing box 2. The lifting and pushing plate 63 is arranged in an inverted T shape. The motor drives the reciprocating threaded rod 62 to rotate so that the lifting and pushing plate 63 moves up and down.

[0028] like Figure 5 and Figure 6 As shown, lifting rods 64 are rotatably installed on both sides of the lifting and pushing plate 63. The two lifting rods 64 are symmetrically arranged. Limit blocks 65 are provided at the bottom of the two lifting rods 64. The two limit blocks 65 are fixedly installed on both sides of the lifting and pushing plate 63. When the lifting and pushing plate 63 drives the lifting rods 64 on both sides to move upward, the limit blocks 65 limit the support and keep it horizontal. After the lifting rods 64 on both sides move downward, they rotate to avoid cross-extrusion with the tension plate 66.

[0029] like Figure 5 and Figure 6 As shown, the tops of the two lifting rods 64 are provided with tension plates 66, and the tension plates 66 and the lifting rods 64 are arranged in an interlaced manner, and the tension plates 66 are arranged in a horizontal state. A retaining block 67 is rotatably installed on one side of the tension plate 66, and the retaining block 67 is fixedly installed on the outer wall of the second tooth plate 58. The top of the tension plate 66 is fixedly installed with a supporting spring 68, and the supporting spring 68 is fixedly installed on the outer wall of the retaining block 67. A clamping block 69 is provided on the top of the retaining block 67, and the clamping block 69 is fixedly installed on the outer walls of the processing box 2 and the purification box 3. When the lifting rods 64 on both sides move upward, the tension plates 66 and the retaining blocks 67 are lifted up, thereby driving the second tooth plate 58 to move upward synchronously. After the retaining blocks 67 move to the position of the clamping blocks 69, the retaining blocks 67 are stopped by limiting. At this time, the tension plate 66 on the retaining blocks 67 is subjected to force and compresses the support spring 68 to rotate, thereby disengaging from the lifting and squeezing of the lifting rod 64.

[0030] like Figure 5 and Figure 6 As shown, a weight plate 610 is fixedly installed on the bottom outer walls of the two second tooth plates 58. The weight plate 610 is set in a horizontal state. After the second tooth plates 58 on both sides lose the lifting force, they are moved downward through the weight plate 610.

[0031] In specific implementation, the motor drives the reciprocating threaded rod 62 to rotate so that the lifting and pushing plate 63 moves upward. When the lifting and pushing plate 63 drives the lifting rods 64 on both sides to move upward, the limit blocks 65 limit the support and keep it horizontal. When the lifting rods 64 on both sides move upward, the tension plate 66 and the retaining block 67 are pushed up, thereby driving the second tooth plate 58 to move upward synchronously. At this time, the second toothed plate 58 located between the treatment box 2 and the purification box 3 first moves upward, driving the gear 57 to rotate, causing the first toothed plate 56 to push the belt plate 55 downward. The belt plate 55 drives the pull rod 54 downward to pull open the piston plate 53. Then, the piston plate 53 creates a negative pressure in the drainage channel 51, which guides the treated water in the treatment box 2 into the purification box 3. After the retaining block 67 moves up to the position of the clamping block 69, the retaining block 67 is stopped by the limit. At this time, the tension plate 66 on the retaining block 67 is forced to compress the support spring 68 and rotate, breaking away from the lifting and squeezing of the lifting rod 64. After the second tooth plates 58 on both sides lose the lifting force, they are moved downward by the heavy pressure plate 610. Therefore, the piston plate 53 moves up again to close the drainage guide groove 51 between the processing box 2 and the purification box 3. Then, the lifting plate 63 is further moved upward to open the drainage guide groove 51 between the screening box 1 and the treatment box 2, and the new wastewater in the screening box 1 is sent to the treatment box 2 for treatment, thereby effectively separating the treated wastewater from the untreated wastewater to avoid affecting the wastewater treatment.

[0032] Example 2: In order to solve the problem of the lack of a structure to separate the sediment and floating objects generated during the wastewater treatment process, which results in the wastewater being simultaneously carried out as it continuously enters the next stage after re-treatment, further affecting the wastewater treatment effect, the following technical solution is proposed: like Figure 2 and Figure 7 As shown, the inner wall of the processing box 2 is provided with a partition mechanism 7, and the partition mechanism 7 includes two telescopic rods 71 hinged on the outer wall of the bottom of the lifting plate 63. The two telescopic rods 71 are symmetrically arranged. A sliding plate 72 is hinged on one side of the two telescopic rods 71. The sliding plate 72 is slidably installed on the top of the processing box 2. A partition plate 73 is fixedly installed on the bottom of the sliding plate 72. The partition plate 73 is arranged in a vertical state. The outer wall of the partition plate 73 fits with the inner wall of the processing box 2. When the lifting plate 63 moves up, it drives the two telescopic rods 71 to make the sliding plate 72 slide. At this time, the sliding plate 72 drives the partition plate 73 to slide synchronously to push the floating objects in the processing box 2 backward.

[0033] like Figure 7 As shown, the bottom of the partition plate 73 is hinged with a pull rod 74, and the bottom of the pull rod 74 is hinged with a flap 75, which is set in an inclined state. The bottom of the flap 75 is rotatably installed with a debris guide plate 76, which is fixedly installed at the bottom of the treatment box 2. The top of the debris guide plate 76 is set in an inclined state, and when the partition plate 73 moves, it drives the pull rod 74 to lift the flap 75 upward. At this time, the sediment accumulated on the debris guide plate 76 is pushed backward by force to avoid being synchronously carried away by the drainage guide trough 51 and affecting the treatment effect of the wastewater.

[0034] During specific implementation, when the lifting and pushing plate 63 moves upward, it drives the two telescopic rods 71 to make the sliding and pushing plate 72 slide. At this time, the sliding and pushing plate 72 drives the partition plate 73 to slide synchronously to push the floating objects in the treatment box 2 backward. When the partition plate 73 moves, it drives the pull bar 74 to lift the flap 75 upward. At this time, the sediment accumulated on the guide plate 76 is pushed backward by force to avoid being carried away synchronously by the drainage guide groove 51 and affecting the wastewater treatment effect.

[0035] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage wastewater zero discharge device, comprising a screening box (1), a treatment box (2) provided on one side of the bottom of the screening box (1), a purification box (3) provided on one side of the bottom of the treatment box (2), a sieve plate (4) fixedly installed inside the screening box (1), characterized in that: A segmented drainage mechanism (5) and an interval lifting and pushing mechanism (6) are provided between the screening box (1) and the processing box (2), and between the processing box (2) and the purification box (3); The segmented drainage mechanism (5) comprises drainage guide grooves (51) fixedly mounted on the top of one side of the screening box (1) and the processing box (2), respectively. The drainage guide grooves (51) are arranged in a gate shape. The outer walls of the two drainage guide grooves (51) are connected to a discharge groove (52), and the two discharge grooves (52) respectively penetrate the outer walls of the processing box (2) and the purification box (3); The inner wall of the drainage guide groove (51) is provided with a piston plate (53), and the piston plate (53) is arranged in a horizontal state. The outer wall of the piston plate (53) is in contact with the inner wall of the drainage guide groove (51). Pull rods (54) are fixedly installed on both sides of the bottom of the piston plate (53), and the two pull rods (54) are symmetrically arranged. The bottoms of the two pull rods (54) are respectively fixedly installed with a same-belt plate (55), and the two same-belt plates (55) are arranged in a horizontal state.

2. The multi-stage wastewater zero discharge device according to claim 1, characterized in that: A first tooth plate (56) is fixedly mounted on one side of the two belt plates (55), and the two first tooth plates (56) are slidably mounted on the outer wall of the screening box (1). The two first tooth plates (56) are arranged in a vertical state. A gear (57) is engaged on one side of the two first tooth plates (56), and the two gears (57) are rotatably mounted on the outer wall of the processing box (2). A second tooth plate (58) is engaged on the other side of the two gears (57), and the two second tooth plates (58) are slidably mounted on the outer wall of the processing box (2). The two second tooth plates (58) and the two first tooth plates (56) are staggered with each other.

3. The multi-stage wastewater zero discharge device according to claim 2, characterized in that: The interval lifting and pushing mechanism (6) includes a motor (61) fixedly mounted on the top of the processing box (2), a reciprocating threaded rod (62) is provided at the bottom of the motor (61), the reciprocating threaded rod (62) is arranged in a vertical state, the outer wall of the reciprocating threaded rod (62) is threadedly connected to a lifting and pushing plate (63), the lifting and pushing plate (63) is slidably mounted on the outer wall of the processing box (2), and the lifting and pushing plate (63) is arranged in an inverted T shape.

4. The multi-stage wastewater zero discharge device according to claim 3, characterized in that: Lifting rods (64) are rotatably mounted on both sides of the lifting and pushing plate (63). The two lifting rods (64) are symmetrically arranged with each other. Limiting blocks (65) are provided at the bottoms of the two lifting rods (64). The two limiting blocks (65) are fixedly mounted on both sides of the lifting and pushing plate (63).

5. The multi-stage wastewater zero discharge device according to claim 4, characterized in that: A tension plate (66) is provided on the top of the two lifting rods (64), and the tension plate (66) and the lifting rod (64) are arranged in an interlaced manner. The tension plate (66) is arranged in a horizontal state. A retaining block (67) is rotatably installed on one side of the tension plate (66), and the retaining block (67) is fixedly installed on the outer wall of the second tooth plate (58). A support spring (68) is fixedly installed on the top of the tension plate (66), and the support spring (68) is fixedly installed on the outer wall of the retaining block (67). A clamping block (69) is provided on the top of the retaining block (67), and the clamping block (69) is fixedly installed on the outer walls of the processing box (2) and the purification box (3).

6. The multi-stage wastewater zero discharge device according to claim 2, characterized in that: A weight plate (610) is fixedly mounted on the bottom outer walls of the two second tooth plates (58), and the weight plate (610) is arranged in a horizontal state.

7. The multi-stage wastewater zero discharge device according to claim 3, characterized in that: The inner wall of the processing box (2) is provided with a partition mechanism (7), which includes two telescopic rods (71) hinged on the outer wall of the bottom of the lifting plate (63), and the two telescopic rods (71) are symmetrically arranged. A sliding plate (72) is hinged on one side of the two telescopic rods (71), and the sliding plate (72) is slidably installed on the top of the processing box (2). A partition plate (73) is fixedly installed on the bottom of the sliding plate (72), and the partition plate (73) is arranged in a vertical state. The outer wall of the partition plate (73) is in contact with the inner wall of the processing box (2).

8. The multi-stage zero-discharge wastewater device according to claim 7, characterized in that: The bottom of the partition plate (73) is hinged with a pull bar (74), the bottom of the pull bar (74) is hinged with a flap (75), the flap (75) is arranged in an inclined state, the bottom of the flap (75) is rotatably mounted with a debris guide plate (76), the debris guide plate (76) is fixedly mounted on the bottom of the processing box (2), and the top of the debris guide plate (76) is arranged in an inclined state.

9. A multi-stage wastewater zero discharge process, using a multi-stage wastewater zero discharge device according to any one of claims 1 to 8, characterized in that: Specifically, it includes separating treated and untreated wastewater and isolating the generated sediment and floating matter.

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