A sludge dewatering device for water conservancy project construction and its working method

Abstract

The invention relates to the technical field of sludge dewatering, and in particular to a sludge dewatering device for water conservancy project construction and a working method thereof, comprising a belt filter press and a sludge unloading mechanism, wherein the top of the belt filter press is provided with a sludge unloading mechanism, the sludge unloading mechanism comprises a sludge bucket, and the sludge bucket is arranged on the belt filter press via supporting arms on all sides, a plurality of discharge troughs are provided at the bottom side of the sludge bucket, a rotating shaft is rotatably installed in the discharge trough, and a plurality of discharge blades are arranged at equal angles on the rotating shaft; when the sludge passes through the sludge channel in the shape of an isosceles trapezoid, as the sludge continues to move downward, impurities such as sand and gravel of different specifications are stuck between two conveyor belts of a de-impurity component, and the sludge is transmitted on a conveying roller through the conveyor belt, so that the impurities such as sand and gravel stuck on the conveyor belt are conveniently transported, and discharged from the end of the de-impurity component close to the movable end plate, so as to realize the de-impurity work of the sludge, and avoid the damage of the filter belt and the pressing roller by sharp impurities such as sand and gravel during the subsequent filtration.

Description

Technical Field

[0001] The invention relates to the technical field of sludge dewatering, and in particular to a sludge dewatering device for water conservancy project construction and a working method thereof. Background Art

[0002] During the construction of water conservancy projects, a large amount of sludge accumulates at the bottom of the dam. The sludge at the bottom of the dam needs to be regularly sucked out and transferred. Since the sludge contains a large amount of water, it needs to be dehydrated before being transferred.

[0003] The existing sludge dewatering device performs filter pressing through a filter belt. The directly extracted sludge contains impurities such as sand and gravel. During the filter pressing process, the filter belt and the pressure roller are easily damaged. At the same time, before the filter pressing, the sludge needs to be divided into strips to facilitate the movement of the sludge to the blank spaces on both sides during the filter pressing. Different sludges have different water contents, which leads to different amounts of sludge remaining between the filter belts after the filter pressing. At the same time, under the same pressure, the water content of the sludge after the filter pressing is different. Summary of the invention

[0004] The problem solved by the present invention is to provide a sludge dewatering device for water conservancy project construction and a working method thereof, which solves the problem that the existing sludge dewatering device performs filter pressing through a filter belt, and the directly extracted sludge contains impurities such as sand and gravel, which is easy to damage the filter belt and the pressure roller during the filter pressing process. At the same time, before the filter pressing, the sludge needs to be divided into strips to facilitate the movement of the sludge to the blank spaces on both sides during the filter pressing. Different sludges have different water contents, which leads to different amounts of sludge remaining between the filter belts after the filter pressing. At the same time, under the same pressure, the water content of the sludge after the filter pressing is different.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sludge dewatering device for water conservancy project construction comprises a belt filter press and a sludge unloading mechanism, wherein the top of the belt filter press is provided with the sludge unloading mechanism, the sludge unloading mechanism comprises a sludge hopper, and the sludge hopper is installed on the belt filter press via support arms on all sides, a plurality of discharge troughs are provided on the bottom side of the sludge hopper, a rotating shaft is rotatably installed in the discharge trough, a plurality of discharge blades are provided at equal angles on the rotating shaft, a debris removal component is provided under each of the discharge troughs, and the debris removal components are arranged in sequence along the moving direction of the filter belt of the belt filter press, a sludge channel is provided in the debris removal component, and the shape of the sludge channel is an inverted isosceles trapezoid.

[0007] Preferably, a first motor is installed on the side wall of the sludge hopper, and an output end of the first motor is connected to a rotating shaft.

[0008] Preferably, the number of the unloading blades on the rotating shaft is an even number, and the width of the two unloading blades plus the diameter of the rotating shaft is the same as the width of the unloading trough.

[0009] Preferably, the impurity removal component includes two top cross plates connected to the bottom side of the sludge hopper, and the two top cross plates are symmetrically arranged about the central axis of the rotating shaft, a bottom cross plate is installed on the outer side of the top cross plate through a support frame, a number of conveying rollers are installed between the top cross plate and the bottom cross plate, and the number of conveying rollers are connected through a conveyor belt transmission.

[0010] Preferably, several ends of the conveying rollers are respectively connected to the top cross plate and the bottom cross plate through bearings, a first transmission box is installed at the end of the top cross plate, and two rotating teeth are meshingly installed in the first transmission box, one of the rotating teeth is connected to the end of the conveying roller, and the other rotating tooth is connected to the output end of the second motor on the first transmission box.

[0011] Preferably, a plurality of mud dividing blocks are installed at equal intervals between the two bottom horizontal plates, and the mud dividing blocks are in the shape of a triangle.

[0012] Preferably, a fixed end plate is fixedly installed at one end of the impurity removal component, and a movable end plate is installed at the other end of the impurity removal component, and threaded blocks are symmetrically arranged on both sides of the movable end plate.

[0013] Preferably, shaft seats are installed on the bottom side of the sludge hopper and on both sides of the discharge chute, and threaded rods are installed on the bearings of the shaft seats, and the threaded rods are threadedly connected to the threaded blocks.

[0014] Preferably, a second transmission box is installed on the side wall of the sludge hopper through a connecting arm, the two ends of the threaded rods are located inside the second transmission box and synchronous wheels are installed at both ends, the two synchronous wheels are connected through a synchronous belt drive, and a third motor is installed on the outside of the second transmission box, and the output end of the third motor is connected to one of the synchronous wheels.

[0015] A working method of a sludge dewatering device for water conservancy project construction, the specific operating steps of the working method are as follows:

[0016] Step 1: During the construction of the water conservancy project, the sludge at the bottom of the river is pumped into the sludge hopper of the sludge unloading mechanism through the operation of the sludge pump, and the rotating shaft is driven to rotate by the first motor, and then the sludge in the sludge hopper is evenly transported to the sludge channel of the impurity removal component through the rotating discharge blades. When the two opposite discharge blades on the rotating shaft are flush with the discharge trough, the discharge trough is closed, and the sludge cannot enter the sludge channel, thereby controlling the connection between the impurity removal component and the sludge hopper;

[0017] Step 2: When the sludge passes through the isosceles trapezoidal sludge channel, as the sludge continues to move downward, impurities such as sand and gravel of different specifications are stuck between the two conveyor belts of the impurity removal component. The sludge continues to move downward, and is diverted and guided by the triangular mud block. The sludge is laid on the filter belt of the belt filter press in strips with equal spacing. After being driven by the filter belt, the sludge is filtered and dehydrated in the belt filter press;

[0018] Step three: The third motor works, and the synchronous wheel and the synchronous belt are driven to realize the rotation of the threaded rod. At this time, the threaded block threadedly connected to the threaded rod drives the movable end plate to move and separate from the end of the impurity removal component. At this time, the second motor works, and the gears are engaged and driven to realize the transmission of the conveyor belt on the conveyor roller. The two conveyor belts are driven synchronously to transport impurities such as sand and gravel stuck on the conveyor belts and discharge them from the end of the impurity removal component close to the movable end plate.

[0019] The beneficial effects of the present invention are as follows: through the rotation of the rotating shaft and the feeding blades in the feeding chute, the sludge in the sludge hopper can be transported to the impurity removal component to achieve uniform feeding, and the feeding chute can be closed to achieve separate use of the impurity removal components, and impurities such as sand and gravel in the impurity removal component can be removed while the device is working without stopping.

[0020] After the sludge passes through the diversion guide of the mud block, the sludge is laid on the filter belt of the belt filter press in strips with equal spacing. As the water content of the sludge increases, the number of impurity removal components working at this time increases. When the sludge passes under the impurity removal components, it is stacked on the filter belt in strips for transportation, ensuring that the sludge filtration efficiency is improved during the subsequent filtration and dehydration.

[0021] When the sludge passes through the isosceles trapezoidal sludge channel, as the sludge continues to move downward, impurities such as sand and gravel of different specifications are stuck between the two conveyor belts of the impurity removal component, and are transmitted on the conveyor roller through the conveyor belt, so that the sand and gravel stuck on the conveyor belt can be transported and discharged from the impurity removal component close to the movable end plate, thereby achieving the impurity removal of the sludge and avoiding damage to the filter belt and pressure roller caused by sharp impurities such as sand and gravel during subsequent filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the first structure of the mud unloading mechanism of the present invention;

[0024] Figure 3 This is a second structural schematic diagram of the mud unloading mechanism of the present invention;

[0025] Figure 4 This is a third structural schematic diagram of the mud unloading mechanism of the present invention;

[0026] Figure 5 It is a cross-sectional view of the impurity removal component of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the mud block of the present invention;

[0028] Figure 7 It is a schematic diagram of the internal structure of the second transmission box of the present invention.

[0029] Legend:

[0030] 1. Belt filter press; 2. Mud unloading mechanism; 3. Sludge bucket; 4. Support arm; 5. Discharge chute; 6. Rotating shaft; 7. Discharge blade; 8. First motor; 9. De-impurity assembly; 10. Top cross plate; 11. Support frame; 12. Conveyor roller; 13. Conveyor belt; 14. Bottom cross plate; 15. Mud separation block; 16. First transmission box; 17. Second motor; 18. Fixed end plate; 19. Movable end plate; 20. Threaded block; 21. Shaft seat; 22. Threaded rod; 23. Second transmission box; 24. Connecting arm; 25. Third motor; 26. Synchronous wheel; 27. Synchronous belt. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe 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 creative work are within the scope of protection of the present invention.

[0032] Specific examples are given below. Embodiment 1

[0033] See also Figure 1 , Figure 2 and Figure 5 A sludge dewatering device for water conservancy project construction includes a belt filter press 1 and a sludge discharge mechanism 2. The belt filter press 1 is provided with a sludge discharge mechanism 2 on the top. The sludge discharge mechanism 2 includes a sludge hopper 3, and the sludge hopper 3 is provided on the belt filter press 1 through support arms 4. A plurality of feed troughs 5 are provided at the bottom of the sludge hopper 3. A rotating shaft 6 is rotatably installed in the feed trough 5. A plurality of feed blades 7 are provided at equal angles on the rotating shaft 6. A first motor 8 is provided on the side wall of the sludge hopper 3. The output end of the first motor 8 is connected to the rotating shaft 6. The number of the feed blades 7 on the rotating shaft 6 is an even number. The width of the two feed blades 7 plus the width of the rotating shaft 6 is equal to the width of the rotating shaft 6. The diameter of 6 is the same as the width of the discharge chute 5. The first motor 8 drives the rotating shaft 6 to rotate, and then the sludge in the sludge hopper 3 is evenly transported to the sludge channel of the impurity removal component 9 through the rotating discharge blades 7. When the two opposite discharge blades 7 on the rotating shaft 6 are flush with the discharge chute 5, the discharge chute 5 is closed and the sludge cannot enter the sludge channel. The sludge in the sludge hopper 3 can be transported to the impurity removal component 9 to achieve uniform discharge, and the discharge chute 5 can be closed to achieve separate use of the impurity removal component 9. Impurities such as sand and gravel in the impurity removal component 9 can be removed while the maintenance device is working without stopping. Embodiment 2

[0034] See also Figure 3 , Figure 4 , Figure 6 and Figure 7A dust removal component 9 is installed under each feed chute 5, and the dust removal components 9 are arranged in sequence along the moving direction of the filter belt of the belt filter press 1, so as to realize the separate use of the dust removal component 9. After the sludge passes through the diversion guide of the mud dividing block 15, the sludge is laid on the filter belt of the belt filter press 1 in strips at equal intervals. As the water content of the sludge increases, the number of dust removal components 9 working at this time increases. When passing under the dust removal component 9, the sludge is stacked in strips on the filter belt for transportation, so as to improve the sludge filtration efficiency during the subsequent pressure filtration and dehydration. A sludge channel is opened in the dust removal component 9, and the shape of the sludge channel is an inverted isosceles trapezoid. The dust removal component 9 includes two top horizontal plates 10 connected to the bottom side of the sludge hopper 3, and the two top horizontal plates 10 are symmetrically arranged with the central axis of the rotating shaft 6. A bottom cross plate 14 is installed on the outside of the top cross plate 10 through a support frame 11, and a plurality of conveying rollers 12 are installed between the top cross plate 10 and the bottom cross plate 14, and the plurality of conveying rollers 12 are connected through a conveyor belt 13. The ends of the plurality of conveying rollers 12 are respectively connected to the top cross plate 10 and the bottom cross plate 14 through bearings, and a first transmission box 16 is installed at the end of the top cross plate 10, and two rotating teeth are meshed and installed in the first transmission box 16, one of which is connected to the end of the conveying roller 12, and the other is connected to the output end of the second motor 17 on the first transmission box 16. A plurality of mud dividing blocks 15 are installed at equal intervals between the two bottom cross plates 14, and the mud dividing blocks 15 are triangular in shape. A fixed end plate 18 is fixedly installed at one end of the impurity removal component 9, and a fixed end plate 18 is installed at the other end of the impurity removal component 9. There is a movable end plate 19, and threaded blocks 20 are symmetrically arranged on both sides of the movable end plate 19. A shaft seat 21 is installed on the bottom side of the sludge hopper 3 and on both sides of the discharge chute 5. A threaded rod 22 is installed on the bearing of the shaft seat 21, and the threaded rod 22 is threadedly connected with the threaded block 20. A second transmission box 23 is installed on the side wall of the sludge hopper 3 through a connecting arm 24. The ends of the two threaded rods 22 are located inside the second transmission box 23. Synchronous wheels 26 are installed at both ends. The two synchronous wheels 26 are connected through a synchronous belt 27. A third motor 25 is installed on the outside of the second transmission box 23, and the output end of the third motor 25 is connected to one of the synchronous wheels 26. When the sludge passes through the sludge channel in the shape of an isosceles trapezoid, as the sludge continues to move downward, impurities such as sand and gravel of different specifications are stuck in the two conveying parts of the impurity removal component 9. The sludge continues to move downward between the belts 13, and is guided by the diversion of the triangular mud block 15. The sludge is laid on the filter belt of the belt filter press 1 in strips at equal intervals. It is driven by the filter belt and filtered to remove water in the belt filter press 1. The third motor 25 works, and the synchronous wheel 26 and the synchronous belt 27 are driven, so as to realize the rotation of the threaded rod 22. At this time, the threaded block 20 threadedly connected with the threaded rod 22 drives the movable end plate 19 to move and separate from the end of the impurity removal component 9. At this time, the second motor 17 works, and the gear meshing transmission is used to realize the transmission of the conveyor belt 13 on the conveying roller 12, and the two conveyor belts 13 are driven synchronously to transport impurities such as sand and gravel stuck on the conveyor belt 13, and discharge them from the end of the impurity removal component 9 close to the movable end plate 19, thereby realizing the impurity removal of the sludge.Avoid damage to the filter belt and roller caused by sharp impurities such as sand and gravel during subsequent filtration.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sludge dewatering device for water conservancy project construction, characterized in that: The invention comprises a belt filter press (1) and a mud discharge mechanism (2), wherein the top of the belt filter press (1) is provided with the mud discharge mechanism (2), the mud discharge mechanism (2) comprises a mud hopper (3), and the mud hopper (3) is provided on the belt filter press (1) via support arms (4) on all sides, a plurality of feed chutes (5) are provided on the bottom side of the mud hopper (3), a rotating shaft (6) is rotatably installed in the feed chutes (5), and a plurality of lower chutes (5) are provided on the rotating shaft (6) at equal angles. The material blades (7) are provided on the rotating shaft (6), the number of the material blades (7) on the rotating shaft (6) is an even number, the width of the two material blades (7) plus the diameter of the rotating shaft (6) is the same as the width of the material trough (5), a dust removal component (9) is installed below each material trough (5), and the dust removal components (9) are arranged in sequence along the moving direction of the filter belt of the belt filter press (1), and a sludge channel is opened in the dust removal component (9), and the sludge channel is in the shape of an inverted isosceles trapezoid; The impurity removal component (9) comprises two top transverse plates (10) connected to the bottom side of the sludge hopper (3), and the two top transverse plates (10) are symmetrically arranged with respect to the central axis of the rotating shaft (6); a bottom transverse plate (14) is installed on the outer side of the top transverse plate (10) through a support frame (11); a plurality of conveying rollers (12) are installed between the top transverse plate (10) and the bottom transverse plate (14), and the plurality of conveying rollers (12) are connected to the top transverse plate (10) and the bottom transverse plate (14) through a transmission belt (13); the ends of the plurality of conveying rollers (12) are respectively connected to the top transverse plate (10) and the bottom transverse plate (14) through bearings; a first transmission box (16) is installed at the end of the top transverse plate (10), and two rotating teeth are meshedly installed in the first transmission box (16), one of the rotating teeth The conveying roller (12) is connected to the end of the conveying roller (12), and the other rotating gear is connected to the output end of the second motor (17) on the first transmission box (16). A plurality of mud dividing blocks (15) are installed at equal intervals between the two bottom horizontal plates (14), and the mud dividing blocks (15) are in the shape of a triangle. A fixed end plate (18) is fixedly installed at one end of the impurity removal component (9), and a movable end plate (19) is installed at the other end of the impurity removal component (9). Threaded blocks (20) are symmetrically arranged on both sides of the movable end plate (19). A shaft seat (21) is installed on the bottom side of the sludge hopper (3) and on both sides of the discharge chute (5). A threaded rod (22) is installed on the bearing of the shaft seat (21), and the threaded rod (22) is threadedly connected to the threaded block (20); A second transmission box (23) is installed on the side wall of the sludge hopper (3) via a connecting arm (24); the ends of the two threaded rods (22) are located inside the second transmission box (23); synchronous wheels (26) are installed at both ends; the two synchronous wheels (26) are connected by a synchronous belt (27); a third motor (25) is installed on the outside of the second transmission box (23); and the output end of the third motor (25) is connected to one of the synchronous wheels (26).

2. A sludge dewatering device for water conservancy project construction according to claim 1, characterized in that: A first motor (8) is installed on the side wall of the sludge hopper (3), and an output end of the first motor (8) is connected to the rotating shaft (6).

3. The working method of a sludge dewatering device for water conservancy project construction according to claim 2, characterized in that: The specific steps of this working method are as follows: Step 1: During the construction of a water conservancy project, the sludge at the bottom of the river is pumped into the sludge hopper (3) of the sludge unloading mechanism (2) by the operation of a sludge pump, and the rotating shaft (6) is driven to rotate by the operation of a first motor (8), and the sludge in the sludge hopper (3) is evenly transported to the sludge channel of the impurity removal component (9) by the rotating discharge blades (7). When the two opposite discharge blades (7) on the rotating shaft (6) are flush with the discharge trough (5), the discharge trough (5) is closed, and the sludge cannot enter the sludge channel, thereby controlling the connection between the impurity removal component (9) and the sludge hopper (3); Step 2: When the sludge passes through the sludge channel in the shape of an isosceles trapezoid, as the sludge continues to move downward, impurities such as sand and gravel of different specifications are stuck between the two conveyor belts (13) of the impurity removal component (9), and the sludge continues to move downward, and is diverted and guided by the triangular sludge dividing block (15), and the sludge is laid on the filter belt of the belt filter press (1) in strips at equal intervals, and is driven by the filter belt to perform pressure filtration and water removal in the belt filter press (1); Step 3: The third motor (25) is operated, and the synchronous wheel (26) and the synchronous belt (27) are driven to thereby realize the rotation of the threaded rod (22). At this time, the threaded block (20) threadedly connected to the threaded rod (22) drives the movable end plate (19) to move and separate from the end of the impurity removal component (9). At this time, the second motor (17) is operated, and the gears are meshed to drive, so that the conveyor belt (13) is driven on the conveyor roller (12), and the two conveyor belts (13) are driven synchronously, and impurities such as sand and gravel stuck on the conveyor belt (13) are transported and discharged from the end of the impurity removal component (9) close to the movable end plate (19).

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