Wastewater treatment device for calcium hydroxide production

Abstract

The invention relates to the field of wastewater neutralization treatment, in particular to a wastewater treatment device for calcium hydroxide production. The existing device is inconvenient to control the adding speed of an acid agent, so that the pH value of the treated wastewater is inconvenient to accurately control, the acid agent is not uniformly mixed with the wastewater when the acid agent is added, and residues are easy to exist after the acid agent is added. A wastewater treatment device for calcium hydroxide production comprises a sedimentation tank and the like. A water inlet is formed in one side of the sedimentation tank, guide rails are fixedly connected to the two sides of the sedimentation tank, an electric sliding block is slidably connected to each guide rail, and a supporting bent arm is fixedly connected to each electric sliding block. In the rotating process of the intercepting ring, the communicating part between the intercepting opening of the intercepting ring and the flow guide opening of the flow guide ring is gradually reduced, so that the adding speed of the acid agent is changed from high to low, namely, the pH value of the wastewater is changed from high to low, and the pH value of the treated wastewater can be controlled more accurately.

Description

Technical Field

[0001] The present invention relates to the field of wastewater neutralization treatment, in particular to a wastewater treatment device for calcium hydroxide production. Background Art

[0002] The wastewater generated during the production of calcium hydroxide mainly comes from equipment cleaning, raw material soaking, product washing and other links. The wastewater contains high concentrations of calcium ions, hydroxide ions and some suspended matter. The pH value of the wastewater is usually as high as 11-13. During treatment, sulfuric acid, hydrochloric acid or other acid agents are usually added for acid-base neutralization to reduce the pH value to the neutral range.

[0003] However, the existing device is not convenient for controlling the acid addition speed, so it is not convenient to accurately control the pH value of the wastewater after treatment. Moreover, the acid is not mixed evenly with the wastewater when added, and residues are likely to remain after the addition of the acid. Summary of the Invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a wastewater treatment device for calcium hydroxide production, which can better control the addition of the acid agent quickly at first and then slowly, more accurately control the pH value of the wastewater after treatment, and more evenly mix the acid agent with the wastewater when added, and is not prone to producing acid residue.

[0005] The technical implementation scheme of the present invention is: a wastewater treatment device for calcium hydroxide production, including a sedimentation tank, a water inlet is provided on one side of the sedimentation tank, guide rails are fixedly connected on both sides of the sedimentation tank, each of the guide rails is slidably connected to an electric slider, each of the electric sliders is fixedly connected to a support arm, a discharge box is fixedly connected between the two support arms, a funnel is fixedly connected to the upper part of the discharge box, the funnel is connected to the inside of the discharge box, a diversion mechanism is provided at the lower part of the discharge box, the diversion mechanism is used to divert additives into the wastewater, and a feeding mechanism is provided on the discharge box, the feeding mechanism is used to quantitatively add additives in the discharge box.

[0006] More preferably, the flow guiding mechanism includes a straight pipe, the straight pipe is fixedly connected to the lower end of the discharge box, the straight pipe is communicated with the interior of the discharge box, the lower end of the straight pipe is fixedly connected to a diverter frame, the lower part of the diverter frame is fixedly connected to two diverter pipes 1 and two diverter pipes 2, the diverter pipe 2, the diverter pipe 1, the diverter frame and the straight pipe are internally communicated, the lower ends of the two diverter pipes 1 and the two diverter pipes 2 are fixedly connected to a trumpet pipe, a through hole is opened on one side of the trumpet, and one side of each of the trumpet is fixedly connected to a side rod, and each of the side rods is fixedly connected to a side rod. They are all slidably connected with a sliding block, one side of the sliding block is located in the through hole of the trumpet tube, one of the lower parts of the support bent arms is fixedly connected to a servo motor, the output shaft of the servo motor is fixedly connected to a driving gear, the straight tube is rotatably connected to a driven gear, the driven gear is engaged with the driving gear, the inner wall of the straight tube is rotatably connected to a guide ring, a guide port is opened on the guide ring, four magnet blocks 1 are fixedly connected to the driven gear, four magnet blocks 2 are fixedly connected to the guide ring, and the magnetism of the magnet block 2 is opposite to that of the magnet block 1.

[0007] The lifting of the lifting mechanism is to be connected with the lifting mechanism of the lifting mechanism, and the lifting mechanism is connected with the lifting mechanism of the lifting mechanism is connected with the lifting mechanism of the lifting mechanism.

[0008] More preferably, a flushing mechanism is further included, which is arranged on one side of the sedimentation tank and is used to flush residual additives in the discharge box. The flushing mechanism includes a piston tank, which is fixedly connected to one side of the sedimentation tank, and a plurality of leakage holes are opened on the side of the piston tank. A piston rod is slidably connected to the piston tank, and a water outlet pipe is fixedly connected to one side of the piston tank. An extension pipe is slidably connected to the upper part of the water outlet pipe, and a connecting spring is connected between the extension pipe and the water outlet pipe. An extrusion rod is fixedly connected to the piston rod, and a waterproof pipe is fixedly connected to one side of the sedimentation tank, and the waterproof pipe passes through the sedimentation tank. One side of the extrusion rod is located in the waterproof pipe, and a return spring is connected between the extrusion rod and the waterproof pipe. A cross bar is fixedly connected between the two diversion pipes, and a water receiving pipe is fixedly connected to the upper part of the discharge box.

[0009] More preferably, a swing mechanism is also included, which is arranged on the diversion pipe 2, and is used to disperse the additives added to the wastewater. The swing mechanism includes two rack long rods, and the two rack long rods are fixedly connected to the bottom of the sedimentation tank. One side of the two diversion pipes 2 is fixedly connected to a support frame, each of the support frames is rotatably connected to a curved rod, and each curved rod is fixedly connected to a rotating gear, which is engaged with the rack long rod. A rotating rod is rotatably connected between the two support frames, and four swing plates are fixedly connected to one side of the rotating rod. Two guide rods are fixedly connected to the rotating rod, and a straight groove is opened on the guide rod. One end of the curved rod is located in the straight groove on the guide rod.

[0010] The present invention has the following advantages: 1. By controlling the addition speed of the acid agent from fast to slow, that is, the pH value of the wastewater changes first quickly and then slowly, the pH value of the treated wastewater can be controlled more accurately.

[0011] 2. After the acid is added, the cross bar will contact the piston rod, and the upper part of the water pipe will also contact a section of the extension pipe. The cross bar will continue to move to squeeze the piston rod and move horizontally together, and the water pipe will also squeeze the extension pipe and move together. The connecting spring is compressed. Since there is a leakage hole on the side of the piston tank, the wastewater will first fill the piston tank, and then the horizontal movement of the piston rod will squeeze the wastewater in the piston tank into the outlet pipe, and then add it into the discharge box from the extension pipe through the water pipe. Adding wastewater to the discharge box can prevent acid residue from remaining in the discharge box.

[0012] 3. When the diversion pipe 2 and the diversion pipe 1 move horizontally, the support frame will drive the rotating gear and the crank rod to move horizontally together, and then the rotating gear will rotate at the same time, thereby driving the crank rod to rotate together. The rotation of the crank rod will drive the guide rod to swing back and forth, and the reciprocating swing of the guide rod will drive the swing plate to swing back and forth. Since the swing plate is located on one side of the trumpet pipe, the reciprocating swing of the swing plate will diffuse the acid flowing out of the trumpet pipe, thereby making the acid and wastewater mixed more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the flow guide mechanism of the present invention.

[0015] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the straight pipe and the diverter frame of the present invention.

[0016] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged three-dimensional structure at point A in the middle.

[0017] Figure 5 It is a schematic diagram of the separated three-dimensional structure of the trumpet tube and the sliding block of the present invention.

[0018] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the trumpet tube and the sliding block of the present invention.

[0019] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the straight tube and the discharge box of the present invention.

[0020] Figure 8 It is a schematic diagram of the separated three-dimensional structure of the guide ring and the intercepting ring of the present invention.

[0021] Figure 9 It is a schematic diagram of the three-dimensional structure of the flushing mechanism of the present invention.

[0022] Figure 10 It is a schematic diagram of the separated three-dimensional structure of the flushing mechanism of the present invention.

[0023] Figure 11 It is a schematic diagram of the three-dimensional structure of the swing mechanism of the present invention.

[0024] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged three-dimensional structure at point B in the middle.

[0025] The markings of the components in the accompanying drawings are as follows: 1. Sedimentation tank, 2. Water inlet, 31. Guide rail, 32. Electric slider, 33. Support arm, 34. Discharge box, 35. Funnel, 41. Straight pipe, 42. Diverter frame, 431. Diverter pipe 1, 432. Diverter pipe 2, 44. Trumpet pipe, 45. Side rod, 46. Sliding block, 47. Servo motor, 48. Driving gear, 49. Driven gear, 410. Guide ring, 411. Magnet block 1, 412. Magnet block 2, 51. Support bent rod 1, 52. Support Bending rod 2, 53, inclined rod, 54, vertical rod, 55, sliding frame, 56, return spring, 57, contact wheel, 58, rotating frame, 59, cut-off ring, 61, piston tank, 62, piston rod, 63, outlet pipe, 64, extension pipe, 65, connecting spring, 66, extrusion rod, 67, waterproof pipe, 68, return spring, 69, cross bar, 610, water pipe, 71, rack long rod, 72, supporting frame, 73, curved rod, 74, rotating gear, 75, rotating rod, 76, swing plate, 77, guide rod. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. 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.

[0027] Example 1 A wastewater treatment device for calcium hydroxide production, such as Figure 1-12 As shown, it includes a sedimentation tank 1, a water inlet 2 is provided on one side of the sedimentation tank 1, guide rails 31 are fixedly connected on both sides of the sedimentation tank 1, each of the guide rails 31 is slidably connected to an electric slider 32, each of the electric sliders 32 is fixedly connected to a support arm 33, a discharge box 34 is fixedly connected between the two support arms 33, a funnel 35 is fixedly connected to the upper part of the discharge box 34, the funnel 35 is communicated with the inside of the discharge box 34, a diversion mechanism is provided at the lower part of the discharge box 34, the diversion mechanism is used to divert additives into the wastewater, and a feeding mechanism is provided on the discharge box 34, the feeding mechanism is used to quantitatively add additives in the discharge box 34.

[0028] The guide mechanism includes a straight pipe 41, which is fixedly connected to the lower end of the discharge box 34. The straight pipe 41 is communicated with the interior of the discharge box 34. The lower end of the straight pipe 41 is fixedly connected to a diverter frame 42. The lower part of the diverter frame 42 is fixedly connected to two diverter pipes 1 431 and two diverter pipes 2 432. The diverter pipes 2 432, the diverter pipe 1 431, the diverter frame 42 and the straight pipe 41 are internally communicated. The lower ends of the two diverter pipes 1 431 and the two diverter pipes 2 432 are fixedly connected to a trumpet pipe 44. A through hole is opened on one side of the trumpet pipe 44. A side rod 45 is fixedly connected to each side of the trumpet pipe 44. Each side rod 45 is slidable A sliding block 46 is connected in a rotatable manner, and one side of the sliding block 46 is located in the through hole of the trumpet tube 44. A servo motor 47 is fixedly connected to the lower part of one of the support arms 33. A driving gear 48 is fixedly connected to the output shaft of the servo motor 47. A driven gear 49 is rotatably connected to the straight tube 41, and the driven gear 49 is engaged with the driving gear 48. A guide ring 410 is rotatably connected to the inner wall of the straight tube 41, and a guide port is opened on the guide ring 410. Four magnet blocks 1 411 are fixedly connected to the driven gear 49, and four magnet blocks 2 412 are fixedly connected to the guide ring 410. The magnetism of the magnet block 2 412 is opposite to that of the magnet block 1 411.

[0029] The feeding mechanism includes two supporting bent rods 51, and the two supporting bent rods 51 are fixedly connected to one side of the sedimentation tank 1. The sedimentation tank 1 is fixedly connected to two supporting bent rods 2 52 on the side away from the supporting bent rod 1 51. An inclined rod 53 is fixedly connected between the supporting bent rod 1 51 and the supporting bent rod 2 52. Each of the supporting bent arms 33 is fixedly connected to a vertical rod 54, and a sliding frame 55 is slidably connected between the two vertical rods 54. A return spring 56 is connected between the sliding frame 55 and the vertical rod 54. Both sides of the sliding frame 55 are rotatably connected to contact wheels 57, and the contact wheels 57 contact the lower surface of the inclined rod 53. The middle part of the discharge box 34 is rotatably connected to a rotating frame 58, and an inclined groove is opened on the upper part of the rotating frame 58. The sliding frame 55 cooperates with the inclined groove of the rotating frame 58. The lower end of the rotating frame 58 is fixedly connected to a cut-off ring 59, and the cut-off ring 59 is provided with a cut-off port.

[0030] In actual work, the wastewater generated during the production of calcium hydroxide is alkaline, so it is necessary to neutralize it by adding an acid to the wastewater. Initially, the intercepting port of the intercepting ring 59 is not aligned with the guide port of the guide ring 410, and the straight pipe 41 is blocked. The wastewater is added to the sedimentation tank 1 through the water inlet 2, and then the acid is added into the discharge box 34 through the funnel 35. After the addition is completed, the electric slider 32 and the servo motor 47 are started. The electric slider 32 drives the discharge box 34, the diverter pipe 1 431 and the diverter pipe 2 432 to move horizontally in the direction away from the water inlet 2, and the servo motor 47 will drive the discharge box 34, the diverter pipe 1 431 and the diverter pipe 2 432 to move horizontally in the direction away from the water inlet 2. The driving gear 48 rotates 180 degrees, thereby driving the driven gear 49 to rotate 180 degrees. The rotation of the driven gear 49 drives the magnet block 1 411 to rotate. The rotation of the magnet block 1 411 drives the magnet block 2 412 and the guide ring 410 to rotate 180 degrees together through magnetic force, so that the intercepting port of the intercepting ring 59 is completely aligned with the guide port of the guide ring 410. Then, the acid in the discharge box 34 flows into the diversion pipe 1 431 and the diversion pipe 2 432 respectively through the straight pipe 41 and the diversion frame 42, and finally flows out from the trumpet 44 to neutralize with the wastewater inside the sedimentation tank 1. The discharge box 3 When the acid is added during horizontal movement, the contact wheel 57 is squeezed by the inclined rod 53 and drives the sliding frame 55 downward. The return spring 56 is compressed, and the contact wheel 57 drives the sliding frame 55 downward, which drives the rotating frame 58 to rotate 180 degrees through the inclined groove on the rotating frame 58. The rotation of the rotating frame 58 drives the intercepting ring 59 to rotate 180 degrees. During the process of the intercepting ring 59 rotating 180 degrees, the portion of the connection between the intercepting port of the intercepting ring 59 and the guide port of the guide ring 410 gradually becomes smaller, thereby causing the speed of adding the acid to change from fast to slow, that is, the pH value of the wastewater changes first quickly and then slowly. This can In order to make the pH value of the wastewater after treatment more accurately controlled, after the acid is added, when the electric slider 32 moves horizontally toward the water inlet 2 to reset, due to the action of the water flow, the sliding block 46 will move horizontally in the direction away from the bell tube 44, thereby opening the through hole on one side of the bell tube 44. In this way, when the bell tube 44 moves toward the water inlet 2 in the wastewater, the water flow will pass through the through hole on one side of the bell tube 44, and the water flow will not easily rush upward into the discharge box 34 through the diverter pipe 1 431 and the diverter pipe 2 432, thereby not easily causing a part of the wastewater to remain.

[0031] Example 2 On the basis of Example 1, Figure 9-10As shown, it also includes a flushing mechanism, which is arranged on one side of the sedimentation tank 1. The flushing mechanism is used to flush the residual additives in the discharge box 34. The flushing mechanism includes a piston tank 61, which is fixedly connected to one side of the sedimentation tank 1. A plurality of leakage holes are opened on the side of the piston tank 61. A piston rod 62 is slidably connected to the piston tank 61. A water outlet pipe 63 is fixedly connected to one side of the piston tank 61. An extension pipe 64 is slidably connected to the upper part of the water outlet pipe 63. A connecting spring 65 is connected between the extension tube 64 and the water outlet pipe 63, an extrusion rod 66 is fixedly connected to the piston rod 62, a waterproof pipe 67 is fixedly connected to one side of the sedimentation tank 1, the waterproof pipe 67 passes through the sedimentation tank 1, one side of the extrusion rod 66 is located in the waterproof pipe 67, a return spring 68 is connected between the extrusion rod 66 and the waterproof pipe 67, a cross bar 69 is fixedly connected between the two diversion pipes 432, and a water receiving pipe 610 is fixedly connected to the upper part of the discharge box 34.

[0032] When the second diverter pipe 432 moves horizontally in the direction away from the water inlet 2 and the acid is added to the wastewater, the second diverter pipe 432 will drive the cross bar 69 to move horizontally in the direction close to the piston rod 62. When the acid is added, the cross bar 69 will contact the piston rod 62, and the upper part of the water receiving pipe 610 will also contact a section of the extension pipe 64. The cross bar 69 continues to move to squeeze the piston rod 62 to move horizontally, and the water receiving pipe 610 will also squeeze the extension pipe 64 to move together, and the connecting spring 65 will be compressed. Since there is a leak hole on the side of the piston tank 61, the wastewater will First, fill the piston tank 61, and then the piston rod 62 moves horizontally to squeeze the wastewater in the piston tank 61 into the outlet pipe 63, and then add it into the discharge box 34 from the extension pipe 64 through the water receiving pipe 610. Since the acid is added after the acid is added, the intercepting ring 59 rotates 180 degrees. At this time, the intercepting port of the intercepting ring 59 is not aligned with the guide port of the guide ring 410. The wastewater added to the discharge box 34 will flow back into the sedimentation tank 1 when the intercepting ring 59 is reset. Adding wastewater to the discharge box 34 can prevent acid residue from remaining in the discharge box 34.

[0033] Example 3 On the basis of Example 2, Figure 11-12As shown, it also includes a swing mechanism, which is arranged on the diversion pipe 432, and is used to disperse the additives added to the wastewater. The swing mechanism includes two rack long rods 71, and the two rack long rods 71 ​​are fixedly connected to the bottom of the sedimentation tank 1. One side of the two diversion pipes 432 is fixedly connected with a support frame 72, and each of the support frames 72 is rotatably connected with a curved rod 73, and each of the curved rods 73 is fixedly connected with a rotating gear 74, and the rotating gear 74 is engaged with the rack long rod 71. A rotating rod 75 is rotatably connected between the two support frames 72, and four swing plates 76 are fixedly connected to one side of the rotating rod 75. Two guide rods 77 are fixedly connected to the rotating rod 75, and a straight groove is opened on the guide rod 77. One end of the curved rod 73 is located in the straight groove on the guide rod 77.

[0034] When the diversion pipe 2 432 and the diversion pipe 1 431 move horizontally, the support frame 72 will drive the rotating gear 74 and the curved rod 73 to move horizontally together, and then the rotating gear 74 will rotate at the same time, thereby driving the curved rod 73 to rotate together. The rotation of the curved rod 73 will drive the guide rod 77 to swing back and forth, and the reciprocating swing of the guide rod 77 will drive the swing plate 76 to swing back and forth. Since the swing plate 76 is located on one side of the bell tube 44, the reciprocating swing of the swing plate 76 will diffuse the acid flowing out of the bell tube 44, thereby making the acid and wastewater mixed more fully.

[0035] Although the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. A wastewater treatment device for calcium hydroxide production, characterized in that: The invention comprises a sedimentation tank (1), wherein a water inlet (2) is provided on one side of the sedimentation tank (1), guide rails (31) are fixedly connected to both sides of the sedimentation tank (1), an electric slider (32) is slidably connected to each guide rail (31), a support arm (33) is fixedly connected to each electric slider (32), a discharge box (34) is fixedly connected between two support arms (33), a funnel (35) is fixedly connected to the upper part of the discharge box (34), the funnel (35) is communicated with the inside of the discharge box (34), a guide mechanism is provided at the lower part of the discharge box (34), the guide mechanism is used to guide additives into wastewater, and a feeding mechanism is provided on the discharge box (34), the feeding mechanism is used to quantitatively add additives in the discharge box (34).

2. A calcium hydroxide production wastewater treatment plant according to claim 1, characterized in that: The flow guiding mechanism includes a straight tube (41), the straight tube (41) is fixedly connected to the lower end of the discharge box (34), the straight tube (41) is communicated with the inside of the discharge box (34), the lower end of the straight tube (41) is fixedly connected to a diversion frame (42), the lower part of the diversion frame (42) is fixedly connected to two diversion tubes (431) and two diversion tubes (432), the diversion tube (432), the diversion tube (431), the diversion frame (42) and the straight tube (41) are internally communicated, the lower ends of the two diversion tubes (431) and the two diversion tubes (432) are fixedly connected to a bell tube (44), one side of the bell tube (44) is provided with a through hole, and one side of each bell tube (44) is fixedly connected to a side rod (45), and each side rod (45) is provided with a sliding A sliding block (46) is rotatably connected, and one side of the sliding block (46) is located in the through hole of the horn tube (44). A servo motor (47) is fixedly connected to the lower part of one of the support arms (33). A driving gear (48) is fixedly connected to the output shaft of the servo motor (47). A driven gear (49) is rotatably connected to the straight tube (41). The driven gear (49) is engaged with the driving gear (48). A guide ring (410) is rotatably connected to the inner wall of the straight tube (41). A guide port is opened on the guide ring (410). Four magnet blocks (411) are fixedly connected to the driven gear (49). Four magnet blocks (412) are fixedly connected to the guide ring (410). The magnetism of the magnet blocks (412) is opposite to that of the magnet block (411).

3. A calcium hydroxide production wastewater treatment plant according to claim 2, characterized in that: The feeding mechanism comprises two supporting curved rods (51), both of which are fixedly connected to one side of the sedimentation tank (1), and two supporting curved rods (52) are fixedly connected to the side of the sedimentation tank (1) away from the supporting curved rod (51), and an inclined rod (53) is fixedly connected between the supporting curved rod (51) and the supporting curved rod (52), and each of the supporting curved arms (33) is fixedly connected to a vertical rod (54), and the two vertical rods (5 4) is slidably connected with a sliding frame (55), a return spring (56) is connected between the sliding frame (55) and the vertical rod (54), contact wheels (57) are rotatably connected on both sides of the sliding frame (55), and the contact wheels (57) are in contact with the lower surface of the inclined rod (53), and a rotating frame (58) is rotatably connected to the middle of the discharge box (34), and a cut-off ring (59) is fixedly connected to the lower end of the rotating frame (58), and a cut-off opening is opened on the cut-off ring (59).

4. A calcium hydroxide production wastewater treatment plant according to claim 3, characterized in that: An oblique groove is formed on the upper portion of the rotating frame (58), and the sliding frame (55) cooperates with the oblique groove of the rotating frame (58).

5. A calcium hydroxide production wastewater treatment plant according to claim 3, characterized in that: The device further comprises a flushing mechanism, which is arranged on one side of the sedimentation tank (1) and is used to flush residual additives in the discharge box (34). The flushing mechanism comprises a piston tank (61), which is fixedly connected to one side of the sedimentation tank (1), a piston rod (62) is slidably connected to the piston tank (61), a water outlet pipe (63) is fixedly connected to one side of the piston tank (61), an extension pipe (64) is slidably connected to the upper part of the water outlet pipe (63), and the extension pipe (64) is connected to the water outlet pipe (63). A connecting spring (65) is connected between the two diversion pipes (432), an extrusion rod (66) is fixedly connected to the piston rod (62), a waterproof pipe (67) is fixedly connected to one side of the sedimentation tank (1), the waterproof pipe (67) passes through the sedimentation tank (1), one side of the extrusion rod (66) is located in the waterproof pipe (67), a return spring (68) is connected between the extrusion rod (66) and the waterproof pipe (67), a cross bar (69) is fixedly connected between the two diversion pipes (432), and a water receiving pipe (610) is fixedly connected to the upper part of the discharge box (34).

6. A calcium hydroxide production wastewater treatment plant according to claim 5, characterized in that: The side of the piston tank (61) is provided with a plurality of leakage holes.

7. A calcium hydroxide production wastewater treatment plant according to claim 5, characterized in that: The invention also includes a swing mechanism, which is arranged on the second diversion pipe (432) and is used to disperse the additives added into the wastewater. The swing mechanism includes two rack long rods (71), and the two rack long rods (71) are fixedly connected to the bottom of the sedimentation tank (1). One side of the two diversion pipes (432) is fixedly connected to a support frame (72), and each support frame (72) is rotatably connected to a curved rod (73). Each curved rod (73) is fixedly connected to a rotating gear (74), and the rotating gear (74) is meshed with the rack long rod (71). A rotating rod (75) is rotatably connected between the two support frames (72), and one side of the rotating rod (75) is fixedly connected to four swing plates (76). Two guide rods (77) are fixedly connected to the rotating rod (75), and a straight groove is opened on the guide rod (77). One end of the curved rod (73) is located in the straight groove on the guide rod (77).

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