Vacuum dehydration device

Abstract

The utility model relates to the technical field of sludge treatment, and provides a vacuum dehydration device which comprises a vacuum pump, a water-gas separation device and a sludge pool, a conveying pipe A is arranged on the side face of the vacuum pump, and the end, away from the vacuum pump, of the conveying pipe A penetrates through the top of the water-gas separation device and is fixedly connected with the top of the water-gas separation device. The top of the water-gas separation device penetrates through and is fixedly connected with a conveying pipe B. The up-and-down moving water filtering mechanism is arranged in the sludge pond, so that liquid water or water vapor in sludge enters the filtering pipe through the water absorption holes under the action of negative pressure when the vacuum pump is started, and the water-gas separation device is used for filtering water in the sludge. In the process, when a motor is started to drive a rotating shaft to rotate, a filter pipe can be driven to repeatedly move downwards through cooperation of a rotating gear, a hydraulic bin, a toothed bar and other assemblies, and the situation that in the water filtering process, the sludge gradually becomes dry and is attached to the surface of the filter layer, and consequently the dehydration rate becomes low is prevented.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, specifically to a vacuum dewatering device. Background Technology

[0002] Sludge treatment is the process of treating, solidifying, dewatering, stabilizing, drying, or incinerating sludge. Sludge often contains a lot of pollutants such as heavy metals, which can easily cause secondary pollution. Therefore, it is increasingly important to find efficient, economical, and large-scale ways to treat or dispose of sludge in a resource-efficient manner.

[0003] Patent document CN110451761A discloses a method and apparatus for solidifying and dewatering sludge using bottom vacuum drainage, including a sludge tank, a vacuum filter tube structure, a first conveying pipe, a water-air separation device, a second conveying pipe, and a vacuum pump. The vacuum filter tube structure is laid at the bottom of the sludge tank. The aforementioned application document describes how the vacuum pump generates negative pressure, which sequentially passes through the second conveying pipe, the water-air separation device, the first conveying pipe, and the vacuum filter tube structure, filling the vacuum filter tube structure. Under the action of negative pressure, liquid water or water vapor in the sludge enters the filter tube through the water suction holes, while the sludge is blocked by the filter layer. The liquid water or water vapor in the sludge flows into the water-air separation device through the filter tube and the first conveying pipe. During the process of the liquid water or water vapor in the sludge entering the filter tube through the water suction holes, the reduced moisture content in the sludge may adhere to the filter layer, leading to a decrease in the subsequent filtration rate. Utility Model Content

[0004] This invention proposes a vacuum dehydration device, which solves the problems mentioned in the above documents.

[0005] The technical solution of this utility model is as follows: A vacuum dehydration device includes a vacuum pump, a water-air separation device, and a sludge tank. A conveying pipe A is provided on the side of the vacuum pump. The end of the conveying pipe A away from the vacuum pump is connected to the top of the water-air separation device and is fixedly connected thereto. A conveying pipe B is connected to the top of the water-air separation device and is fixedly connected thereto. A vertically moving filtration mechanism is provided inside the sludge tank. The vertically moving filtration mechanism includes a sliding plate, a hydraulic chamber, a motor, and four sets of fixed cylinders. The sliding plate is slidably connected to the inner wall of the sludge tank. A telescopic pipe is connected to the top of the sliding plate and is fixedly connected thereto. One end of the telescopic pipe is connected to the conveying pipe B and is slidably connected thereto. A vacuum filter tube assembly is provided at the other end of the telescopic pipe. The hydraulic chamber is fixedly connected to... At the top of the sludge tank, a piston rod A is slidably connected to one end of the hydraulic chamber, and a toothed rod is fixedly connected to the bottom of the piston rod A. A piston rod B is slidably connected to the other end of the hydraulic chamber, and the end of the piston rod B away from the hydraulic chamber is fixedly connected to the top of a sliding plate. A motor is fixedly installed on the side of the sludge tank, and a rotating shaft is fixedly connected to the motor via its output shaft. A rotating gear is fixedly connected to the end of the rotating shaft away from the motor. Four sets of fixed cylinders are fixedly connected to the inner wall of the sludge tank. Each of the four sets of fixed cylinders contains a return spring, and each of the four sets of fixed cylinders contains a slider slidably connected via the return spring. A sliding rod is fixedly connected to the bottom of each of the four sets of sliders, and a deceleration mechanism is provided on both sides of each of the four sets of sliders.

[0006] The vacuum filter tube assembly includes five sets of filter tubes and eight sets of connecting tubes. The surface of each of the five sets of filter tubes is provided with water absorption holes, and the outer wall of each of the five sets of filter tubes is provided with a filter layer. Each pair of filter tubes is connected and fixedly connected by a connecting tube.

[0007] The end of the telescopic tube away from the conveying pipe B is connected to one of the sets of filter tubes through and fixedly connected. When the telescopic tube moves up and down, it will drive the filter tubes to move up and down.

[0008] The rotating gear is an incomplete gear, and the teeth on the rotating gear are matched with the teeth on the rack. When the rotating gear rotates and its teeth mesh with the teeth on the rack, it will drive the rack to move upward.

[0009] The bottom of each of the four sets of sliding rods is fixedly connected to the top of one of the four sets of connecting pipes. When the filter pipe moves downward, it will drive the connecting pipe to move downward, and the downward movement of the connecting pipe will drive the sliding rod to move downward.

[0010] The filter layer is composed of two layers of non-woven geotextile, which can filter silt.

[0011] The deceleration mechanism includes a connecting frame, an elastic rope, a limiting rod, and a deceleration block. The connecting frame and the limiting rod are both fixedly connected to the side of the slider. A rotating rod is rotatably connected to the inner side of the connecting frame. A contact block is fixedly connected to the surface of the rotating rod. One end of the elastic rope is fixedly connected to the side of the slider, and the other end of the elastic rope is fixedly connected to the top of the contact block. The deceleration block is fixedly connected to the inner wall of the fixed cylinder.

[0012] The lateral length of the contact block is greater than the lateral distance from the surface of the rotating rod to the deceleration block. When the contact block moves downward with the slider, it will contact the deceleration block.

[0013] The end of the contact block away from the rotating rod is arc-shaped, and the end of the limiting rod away from the slider is close to the bottom of the contact block. The presence of the limiting rod prevents the contact block from rotating upward.

[0014] The deceleration block has a semi-cylindrical shape and is made of rubber. When the contact block is squeezed against the semi-cylindrical rubber deceleration block, a certain resistance is generated.

[0015] The working principle and beneficial effects of this utility model are as follows:

[0016] 1. This utility model is equipped with a vertically moving water filtration mechanism, which allows liquid water or water vapor in the sludge to enter the filter tube through the suction hole under negative pressure when the vacuum pump is turned on. The filter layer will block the sludge. During this process, when the motor drives the rotating shaft to rotate, the filter tube will be moved downward repeatedly through the cooperation of components such as rotating gears, hydraulic chamber, and rack, to prevent the sludge from gradually drying and adhering to the surface of the filter layer during the water filtration process, thus reducing the dewatering rate.

[0017] 2. This utility model incorporates a slowing mechanism, which, when the filter tube moves downwards, is driven upwards by components such as the fixed cylinder, return spring, slider, and telescopic rod, and further slows down the upward movement of the connecting tube and filter tube by the cooperation of components such as the contact block and deceleration block, preventing excessive speed from causing vibration and damaging the filter tube. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the vertically moving water filtration mechanism of this utility model;

[0022] Figure 4 This is a cross-sectional view of the vertically moving water filtration mechanism of this utility model;

[0023] Figure 5 This is a three-dimensional sectional view of the internal structure of the hydraulic chamber of this utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the deceleration mechanism structure of this utility model;

[0025] Figure 7 This is a three-dimensional sectional view of the deceleration mechanism structure of this utility model.

[0026] In the diagram: 1. Vacuum pump; 2. Water-air separation device; 3. Sludge tank; 4. Delivery pipe A; 5. Delivery pipe B; 6. Up-and-down moving water filtration mechanism; 61. Sliding plate; 62. Telescopic pipe; 63. Vacuum filter tube assembly; 631. Filter layer; 632. Filter tube; 633. Water suction hole; 634. Connecting pipe; 64. Hydraulic chamber; 65. Piston rod A; 66. Gear; 67. Piston rod B; 68. Motor; 69. Rotating shaft; 610. Rotating gear; 611. Fixed cylinder; 612. Return spring; 613. Sliding block; 614. Sliding rod; 7. Deceleration mechanism; 71. Connecting frame; 72. Rotating rod; 73. Contact block; 74. Elastic rope; 75. Limiting rod; 76. Deceleration block. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] like Figures 1 to 5This embodiment proposes a vacuum dehydration device, including a vacuum pump 1, a water-air separation device 2, and a sludge tank 3. A conveying pipe A4 is provided on the side of the vacuum pump 1. The end of the conveying pipe A4 away from the vacuum pump 1 passes through and is fixedly connected to the top of the water-air separation device 2. A conveying pipe B5 passes through and is fixedly connected to the top of the water-air separation device 2. A vertically moving filtration mechanism 6 is provided inside the sludge tank 3. The vertically moving filtration mechanism 6 includes a sliding plate 61, a hydraulic chamber 64, a motor 68, and four sets of fixed cylinders 611. The sliding plate 61 is slidably connected to the inner wall of the sludge tank 3. A telescopic pipe 62 passes through and is fixedly connected to the top of the sliding plate 61. One end of the telescopic pipe 62 passes through the conveying pipe B5. Furthermore, a sliding connection is provided at the other end of the telescopic tube 62, which is equipped with a vacuum filter tube assembly 63. The vacuum filter tube assembly 63 includes five sets of filter tubes 632 and eight sets of connecting tubes 634. The surface of each of the five sets of filter tubes 632 is provided with water absorption holes 633, and the outer wall of each of the five sets of filter tubes 632 is provided with a filter layer 631. The filter layer 631 is composed of two layers of non-woven geotextile. The silt can be filtered through the filter layer 631 composed of two layers of non-woven geotextile. Each pair of filter tubes 632 is connected and fixedly connected through a set of connecting tubes 634. The end of the telescopic tube 62 away from the conveying pipe B5 is connected and fixedly connected to one of the sets of filter tubes 632. When the telescopic tube 62 moves up and down, it will drive the filter tubes 632 to move up and down. The hydraulic chamber 64 is fixedly connected to the top of the sludge tank 3. A piston rod A65 is slidably connected to the piston inside one end of the hydraulic chamber 64, and a gear 66 is fixedly connected to the bottom of the piston rod A65. A piston rod B67 is slidably connected to the piston inside the other end of the hydraulic chamber 64. The end of the piston rod B67 away from the hydraulic chamber 64 is fixedly connected to the top of the sliding plate 61. A motor 68 is fixedly installed on the side of the sludge tank 3. A rotating shaft 69 is fixedly connected to the motor 68 via its output shaft. A rotating gear 610 is fixedly connected to the end of the rotating shaft 69 away from the motor 68. The rotating gear 610 is an incomplete gear, and the teeth on the rotating gear 610 are matched with the teeth on the gear 66. When the toothed rod 66 rotates and meshes with the toothed rod 66, it will drive the toothed rod 66 to move upward. The four sets of fixed cylinders 611 are all fixedly connected to the inner wall of the sludge tank 3. The interior of the four sets of fixed cylinders 611 is equipped with a return spring 612. The interior of the four sets of fixed cylinders 611 is slidably connected to a slider 613 through the return spring 612. The bottom of the four sets of sliders 613 is fixedly connected to a sliding rod 614. The bottom of the four sets of sliding rods 614 is fixedly connected to the top of the four sets of connecting pipes 634 respectively. When the filter pipe 632 moves downward, it will drive the connecting pipe 634 to move downward. When the connecting pipe 634 moves downward, it will drive the sliding rod 614 to move downward. The four sets of sliders 613 are equipped with a slowing mechanism 7 on both sides.

[0030] In this embodiment, sludge is discharged into sludge tank 3, and vacuum pump 1 is turned on. Vacuum pump 1 creates negative pressure in conveying pipe A4 and conveying pipe B5, and the sludge passes through water-air separation device 2. The negative pressure in conveying pipe B5 passes through telescopic pipe 62, creating negative pressure in filter pipe 632. The negative pressure in filter pipe 632 draws liquid water or water vapor from sludge tank 3 through surface water absorption holes 633, while the sludge is blocked by filter layer 631. Liquid water or water vapor flows through filter pipe 632, connecting pipe 634, telescopic pipe 62, and conveying pipe B5. The liquid water is stored in the water-gas separation device 2, while the water vapor flows into the vacuum pump 1 through the second delivery pipe A4 and is eventually discharged, thus completing the sludge consolidation and dewatering process. During this process, the motor 68 can also be turned on. The motor 68 drives the rotating shaft 69 to rotate through its output shaft. The rotation of the rotating shaft 69 drives the rotating gear 610 to rotate. When the rotating gear 610 rotates and its teeth mesh with the teeth on the gear rack 66, it drives the gear rack 66 to move upward. The upward movement of the gear rack 66 drives the piston rod A65. As piston rod A65 moves upward, the hydraulic pressure within hydraulic chamber 64 causes piston rod B67 to move downward. This downward movement of piston rod B67 moves sliding plate 61 downward, which in turn moves telescopic tube 62 downward. The telescopic tube 62 then moves filter tube 632 and connecting tube 634 downward. Sliding rod 614 and slider 613 also move downward, stretching the return spring 612. When rotating gear 610 rotates to the point of toothlessness and disengages from gear rod 66, the return spring... The rebound of 612 causes the slider 613 and slide rod 614 to move upward and return to their original positions. The upward movement of slide rod 614 causes the connecting pipe 634 and filter pipe 632 to move upward. The telescopic pipe 62, sliding plate 61 and piston rod B67 also move upward and return to their original positions. The hydraulic pressure in the hydraulic chamber 64 causes the piston rod A65 and toothed rod 66 to move downward and return to their original positions, thus forming a cycle. By repeatedly moving the filter pipe 632 downward, the sludge gradually dries and adheres to the surface of the filter layer 631 during the water filtration process, which would reduce the dewatering rate.

[0031] Example 2

[0032] like Figures 1 to 7As shown, based on the same concept as Embodiment 1 above, a second embodiment is also proposed. The deceleration mechanism 7 includes a connecting frame 71, an elastic rope 74, a limiting rod 75, and a deceleration block 76. The connecting frame 71 and the limiting rod 75 are both fixedly connected to the side of the slider 613. A rotating rod 72 is rotatably connected to the inner side of the connecting frame 71. A contact block 73 is fixedly connected to the surface of the rotating rod 72. The end of the contact block 73 away from the rotating rod 72 is arc-shaped. The end of the limiting rod 75 away from the slider 613 is close to the bottom of the contact block 73. The presence of the limiting rod 75 prevents the contact block 73 from moving upward. As the slider rotates, one end of the elastic rope 74 is fixedly connected to the side of the slider 613, and the other end of the elastic rope 74 is fixedly connected to the top of the contact block 73. The deceleration block 76 is fixedly connected to the inner wall of the fixed cylinder 611. The lateral length of the contact block 73 is greater than the lateral distance from the surface of the rotating rod 72 to the deceleration block 76. When the contact block 73 moves downward with the slider 613, it will contact the deceleration block 76. The overall shape of the deceleration block 76 is semi-cylindrical, and the material of the deceleration block 76 is rubber. When the contact block 73 and the semi-cylindrical rubber deceleration block 76 are squeezed, a certain resistance will be generated.

[0033] In this embodiment, when the slide bar 614 and the slider 613 move downward, they will drive the connecting frame 71 to move downward. The downward movement of the connecting frame 71 will drive the rotating rod 72 and the contact block 73 to move downward. When the contact block 73 moves downward, it will contact the deceleration block 76. At this time, the bottom of the contact block 73 will be subjected to force and rotate upward, so that it will not squeeze too much with the deceleration block 76 and generate resistance. Then, the elastic rope 74 will rebound and drive the contact block 73 to return to its original position. When the return spring 612 rebounds and drives the slider 613 to move upward and return to its original position, the contact block 73 will move upward and contact the deceleration block 76 again. At this time, due to the presence of the limiting rod 75, the contact block 73 cannot rotate downward. When the contact block 73 moves upward, it will squeeze with the deceleration block 76 and generate resistance, thereby slowing down the speed of the slider 613 and the slide bar 614 moving upward and returning to their original position. This slows down the speed of the connecting tube 634 and the filter tube 632 moving upward and returning to their original position, preventing excessive speed from causing oscillation and damaging the filter tube 632.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vacuum dehydration device, characterized in that, The device includes a vacuum pump (1), a water-air separation device (2), and a sludge tank (3). A conveying pipe A (4) is provided on the side of the vacuum pump (1). The end of the conveying pipe A (4) away from the vacuum pump (1) is connected to the top of the water-air separation device (2) and fixedly connected. A conveying pipe B (5) is connected to the top of the water-air separation device (2) and fixedly connected. A vertically movable water filtration mechanism (6) is provided inside the sludge tank (3). The up-and-down moving filtration mechanism (6) includes a sliding plate (61), a hydraulic chamber (64), a motor (68), and four sets of fixed cylinders (611). The sliding plate (61) is slidably connected to the inner wall of the sludge tank (3). A telescopic pipe (62) is fixedly connected through and to the top of the sliding plate (61). One end of the telescopic pipe (62) is slidably connected through and to the conveying pipe B (5). A vacuum filter tube assembly (63) is provided at the other end of the telescopic pipe (62). The hydraulic chamber (64) is fixedly connected to the top of the sludge tank (3). A piston rod A (65) is slidably connected to the piston inside one end of the hydraulic chamber (64). A toothed rod (66) is fixedly connected to the bottom of the piston rod A (65). A piston rod B (67) is slidably connected to the piston inside the other end of the hydraulic chamber (64). The piston rod B (67) is fixedly connected to the top of the sliding plate (61) at one end away from the hydraulic chamber (64). The motor (68) is fixedly installed on the side of the sludge tank (3). The motor (68) is fixedly connected to a rotating shaft (69) through its output shaft. The rotating shaft (69) is fixedly connected to a rotating gear (610) at one end away from the motor (68). The four sets of fixed cylinders (611) are all fixedly connected to the inner wall of the sludge tank (3). The four sets of fixed cylinders (611) are all provided with a return spring (612). The four sets of fixed cylinders (611) are all slidably connected to a slider (613) through the return spring (612). The bottom of the four sets of sliders (613) is fixedly connected with a sliding rod (614). The four sets of sliders (613) are all provided with a slowing mechanism (7) on both sides.

2. The vacuum dehydration device according to claim 1, characterized in that, The vacuum filter tube assembly (63) includes five sets of filter tubes (632) and eight sets of connecting tubes (634). The surface of each of the five sets of filter tubes (632) is provided with water absorption holes (633), and the outer wall of each of the five sets of filter tubes (632) is provided with a filter layer (631). Each pair of filter tubes (632) is connected and fixedly connected by a set of connecting tubes (634).

3. The vacuum dehydration device according to claim 2, characterized in that, The end of the telescopic tube (62) away from the conveying tube B (5) is connected to one of the sets of filter tubes (632) through and fixedly connected.

4. The vacuum dehydration device according to claim 3, characterized in that, The rotating gear (610) is an incomplete gear, and the teeth on the rotating gear (610) are matched with the teeth on the rack (66).

5. The vacuum dehydration device according to claim 4, characterized in that, The bottom of each of the four sets of slide rods (614) is fixedly connected to the top of each of the four sets of connecting pipes (634).

6. The vacuum dehydration device according to claim 5, characterized in that, The filter layer (631) is composed of two layers of non-woven geotextile.

7. A vacuum dehydration device according to claim 6, characterized in that, The deceleration mechanism (7) includes a connecting frame (71), an elastic rope (74), a limiting rod (75), and a deceleration block (76). The connecting frame (71) and the limiting rod (75) are both fixedly connected to the side of the slider (613). A rotating rod (72) is rotatably connected to the inner side of the connecting frame (71). A contact block (73) is fixedly connected to the surface of the rotating rod (72). One end of the elastic rope (74) is fixedly connected to the side of the slider (613), and the other end of the elastic rope (74) is fixedly connected to the top of the contact block (73). The deceleration block (76) is fixedly connected to the inner wall of the fixed cylinder (611).

8. A vacuum dehydration device according to claim 7, characterized in that, The lateral length of the contact block (73) is greater than the lateral distance from the surface of the rotating rod (72) to the deceleration block (76).

9. A vacuum dehydration device according to claim 8, characterized in that, The end of the contact block (73) away from the rotating rod (72) is arc-shaped, and the end of the limiting rod (75) away from the slider (613) is close to the bottom of the contact block (73).

10. A vacuum dehydration device according to claim 9, characterized in that, The deceleration block (76) has a semi-cylindrical shape.

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