Mechanical accelerated desliming and desilting device for water conservancy channel

Abstract

The utility model discloses a mechanical accelerated desliming and desilting device for a water conservancy channel, which is characterized in that coarse silt is discharged from a first silt outlet through the conveying of a spiral desliming device after being intercepted by a first silt blocking net, so that the first silt blocking net can continuously play a role in filtering the silt, and the rest silt is intercepted by a water seepage net; part of produced water flows to a primary water outlet, silt enters a silt bin at the top of the clarification tank and subsequently enters a cylindrical damping net III, the silt is intercepted in the damping net III by the damping net III and then enters the bottom of the desliming barrel through a silt passing hole along with rotation of the desliming rotor, and water is thrown out of the damping net III and then enters the desliming barrel; and then the sludge is discharged from a clear water overflow hole, redundant water in the sludge at the bottom of the desliming barrel is discharged through a second sludge blocking net, and the sludge at the bottom of the desliming barrel is discharged from a second sludge outlet through pushing of a sludge scraping plate, so that multi-stage desliming is realized, and the desliming efficiency and the desliming effect are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conveyance silt environmental protection treatment equipment, and particularly relates to a mechanical acceleration sludge removal and dredging device for water conservancy channels. Background Technique

[0002] At present, urban water supply companies directly discharge the sludge water without treatment into the Yellow River. When the turbidity of the raw water exceeds 20,000 NTU, the sludge discharge volume is large, the water resource utilization rate is low, and it does not meet the relevant requirements of the Comprehensive Wastewater Discharge Standard (GB8978). With the national ecological civilization construction and the high-quality development of the Yellow River Basin, water purification plants along the Yellow River Basin are required not to discharge the sludge water without treatment. The large accumulation of fine-grained sediment not only occupies valuable land resources, but also brings serious ecological environment and safety problems. With the increasingly strict national environmental protection policies, how to achieve large-scale resource utilization of sediment has become the focus and difficulty in this research field. Giving play to the resource attribute of sediment and effectively realizing its maximum utilization has become the basic requirement for China to build a resource-saving and environment-friendly society and achieve circular economy. Therefore, after each water purification plant starts to carry out environmentally friendly, efficient and low-cost treatment of the sludge water, the overflow water is recycled, and the mud is effectively utilized after sludge removal, which ensures the safety and reliability of water supply, protects the high-quality development of the Yellow River water, effectively maintains the soil and water loss carried away by the sediment, and also provides fertile nutrient soil resources for local farmers. In recent years, water intake manufacturers are in urgent need of setting up a sludge water treatment system. The existing technology is to input the muddy sewage in the water conservancy channel into the radiation pool for primary clarification, and at the same time add food-grade polyacrylamide to promote coagulation precipitation, and then distribute it to the acceleration pool through the collecting well for secondary clarification, which has the defects of inconvenience, poor effect, low efficiency and high cost. Content of the Utility Model

[0003] (1) Technical problems to be solved: The utility model provides a mechanical sludge removal device with simple structure, convenient use, good sludge removal effect, high efficiency and low cost, effectively solving the technical bottleneck encountered in actual production.

[0004] (2) The technical solution adopted by the utility model is as follows:

[0005] A mechanical acceleration sludge removal and dredging device for a water conservancy channel, comprising a device body. A pre-sedimentation tank is arranged at the top of the device body. A first sludge outlet is arranged on one side of the upper part of the pre-sedimentation tank. An obliquely upward first sludge discharge trough is arranged outside the first sludge outlet. A plurality of spiral sludge removal devices are arranged at the first sludge outlet in the pre-sedimentation tank. A first sludge blocking net is arranged below the plurality of spiral sludge removal devices. Sludge discharge troughs are arranged on the first sludge blocking net at positions corresponding to each spiral sludge removal device. A water seepage net is arranged in the lower part of the pre-sedimentation tank. A primary water outlet is arranged at the bottom of the pre-sedimentation tank. A clarification tank is arranged on one side of the device body. A sludge bin is arranged at the top of the clarification tank. The sludge bin is communicated with the bottom of the pre-sedimentation tank. The bottom of the sludge bin is open. A sludge removal cylinder is fixed at the opening. The upper end of the sludge removal cylinder is open. A second sludge blocking net is arranged at the lower end of the sludge removal cylinder. Clear water overflow holes are arranged on the upper part of the cylinder wall of the sludge removal cylinder. A sludge removal rotor is arranged inside the sludge removal cylinder. A cylindrical damping net three is arranged at the top of the sludge removal rotor. A plurality of sludge passing holes are formed in the sludge removal rotor. The sludge removal rotor is connected with a driving device one. A scraping rotor is arranged at the bottom inside the sludge removal cylinder. A plurality of scraping plates are arranged on the scraping rotor. The scraping rotor is connected with a driving device two. A second sludge outlet is arranged on the side wall of the lower part of the sludge removal cylinder corresponding to the scraping rotor. An obliquely upward second sludge discharge trough is arranged at the second sludge outlet.

[0006] A further technical solution lies in that a diversion trough is arranged below the sludge removal cylinder at the bottom of the clarification tank, and a water outlet pipe is arranged at the lower end of the diversion trough.

[0007] A further technical solution lies in that the first sludge blocking net is obliquely arranged, and the lower end of the first sludge blocking net is close to the sludge bin.

[0008] A further technical solution lies in that the driving device one includes a sludge removal motor. A bracket is arranged at the top of the sludge bin. The sludge removal motor is fixed on the bracket. The output shaft of the sludge removal motor is fixedly connected with the sludge removal rotor.

[0009] A further technical solution lies in that the driving device two includes that a scraper motor is fixedly arranged below the diversion trough. The output shaft of the scraper motor penetrates through the diversion trough and the second sludge blocking net and then is connected with the scraping rotor.

[0010] A further technical solution lies in that the scraping plate is of an arc-shaped structure.

[0011] (3) Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows: By arranging an obliquely upward first sludge discharge trough outside the first sludge outlet of the pre-sedimentation tank, and arranging a plurality of spiral sludge dewatering devices at the first sludge outlet in the pre-sedimentation tank, arranging a first sludge blocking net below the plurality of spiral sludge dewatering devices, and arranging sludge discharge troughs at positions corresponding to each spiral sludge dewatering device on the first sludge blocking net, arranging a water seepage net in the lower part of the pre-sedimentation tank, after intercepting coarser sediment by the first sludge blocking net, it is discharged from the first sludge outlet through the conveying of the spiral sludge dewatering device, so that the first sludge blocking net can continuously play the role of filtering sediment, then intercepting the remaining sediment by the water seepage net, part of the produced water flows to the primary water outlet, while the sediment enters the mud bin at the top of the clarification tank and then enters the interior of the cylindrical damping net three subsequently. As the sludge dewatering rotor rotates, the damping net three intercepts the sediment inside the damping net three and then enters the bottom of the sludge dewatering cylinder through the mud passing holes, and the water is thrown out of the damping net three and then enters the sludge dewatering cylinder and is then discharged from the clear water overflow hole. The excess water in the mud at the bottom of the sludge dewatering cylinder will be discharged through the second sludge blocking net, and the mud at the bottom of the sludge dewatering cylinder is pushed by the scraping plate to be discharged from the second sludge outlet. By using the first sludge blocking net and the spiral sludge dewatering device to intercept part of the coarser sediment, using the water seepage net to produce part of the clear water, and using the sludge dewatering cylinder and the sludge dewatering rotor to process the remaining sediment, multi-stage sludge dewatering is realized, and the sludge dewatering efficiency and sludge dewatering effect are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall sectional structure schematic diagram of the present utility model;

[0013] Figure 2 is the position schematic diagram of the first sludge outlet of the present utility model;

[0014] Figure 3 is the structural schematic diagram of the mud bin and the top of the pre-sedimentation tank of the present utility model;

[0015] Figure 4 The connection structure schematic diagram of the sludge dewatering cylinder and the sludge dewatering rotor of the present utility model;

[0016] Figure 5 The top view structural schematic diagram of the sludge dewatering cylinder of the present utility model;

[0017] Figure 6 The structural schematic diagram of the sludge scraping rotor and the sludge scraping plate of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments.

[0019] As Figures 1 - 6Shown. A mechanical acceleration sludge removal and dredging device for a water conservancy channel, comprising a device body 1. A pre-sedimentation tank 2 is arranged at the top of the device body 1. A first sludge outlet 6 is arranged on one side of the upper part of the pre-sedimentation tank 2. An obliquely upward first sludge discharge trough 26 is arranged outside the first sludge outlet 6. A plurality of spiral sludge removal devices 4 are arranged at the first sludge outlet 6 in the pre-sedimentation tank 2. A first sludge blocking net 12 is arranged below the plurality of spiral sludge removal devices 4. Sludge discharge troughs 25 are arranged at positions corresponding to each spiral sludge removal device 4 on the first sludge blocking net 12. A water seepage net 7 is arranged at the lower part inside the pre-sedimentation tank 2. A primary water outlet 8 is arranged at the bottom of the pre-sedimentation tank 2. A clarification tank 22 is arranged on one side of the device body 1. A sludge bin 9 is arranged at the top of the clarification tank 22. The sludge bin 9 is communicated with the bottom of the pre-sedimentation tank 2. The bottom of the sludge bin 9 is open, and a sludge removal cylinder 13 is fixed at the opening. The upper end of the sludge removal cylinder 13 is open, and a second sludge blocking net 17 is arranged at the lower end of the sludge removal cylinder 13. A clear water overflow hole 15 is arranged on the upper part of the cylinder wall of the sludge removal cylinder 13. A sludge removal rotor 14 is arranged inside the sludge removal cylinder 13. A cylindrical damping net three 24 is arranged at the top of the sludge removal rotor 14. A plurality of sludge passing holes are formed on the sludge removal rotor 14. The sludge removal rotor 14 is connected with a first driving device. A sludge scraping rotor 23 is arranged at the bottom inside the sludge removal cylinder 13. A plurality of sludge scraping plates 16 are arranged on the sludge scraping rotor 23. The sludge scraping rotor 23 is connected with a second driving device. A second sludge outlet 21 is arranged on the side wall of the sludge removal cylinder 13 at a position corresponding to the sludge scraping rotor 23 in the lower part. An obliquely upward second sludge discharge trough 27 is arranged at the second sludge outlet 21. The second sludge discharge trough 27 extends out of the device body 1.

[0020] During use, the sludge water is sent to the pre-sedimentation tank 2 at the top of the device body 1 for preliminary filtration to remove impurities such as large particle sand. After passing through the primary filter screen 3 at the bottom of the pre-sedimentation tank 2, the muddy water falls on the first mud blocking net 12. After intercepting the coarser sediment by the first mud blocking net 12, it is discharged from the first mud outlet 6 through the conveyance of the screw sludge dewaterer 4. The screw sludge dewaterer 4 is also called a auger or a screw conveyor, which is realized by the rotation of the screw conveyor rod driven by an electric motor. The rotation speed of the screw sludge dewaterer 4 is adjustable between 50 r / s and 70 r / s. The remaining muddy water falls on the water seepage net 7, and the sediment flows through the mud bin 9, and the water reaches the water pump 20 after passing through the water seepage net 7. The sediment enters the mud bin 9 at the top of the clarification tank 22 and then enters the inside of the cylindrical third damping net 24. As the dewatering rotor 14 rotates, the third damping net 24 intercepts the sediment inside the third damping net 24 and then enters the bottom of the dewatering cylinder 13 through the mud passing holes. The water is thrown out of the third damping net 24 and then enters the dewatering cylinder 13 and is then discharged from the clear water overflow hole 15. The excess water in the mud at the bottom of the dewatering cylinder 13 is discharged through the second mud blocking net 17. The mud at the bottom of the dewatering cylinder 13 is pushed by the scraping plate 16 to be discharged from the second mud outlet 21. The clear water falls on the diversion trough 19. By connecting the water outlet pipe to the water pump 20, the water content of the mud after passing through the dewatering cylinder 13 is between 3% and 5%. During operation, 0.5%-0.8% of food-grade polyacrylamide needs to be added to the pre-sedimentation tank 2 to promote the coagulation and precipitation of sediment. Poly aluminum ferric chloride is added as a coagulant in the mechanical acceleration dewatering and clarification tank 22 to promote the coagulation and precipitation of impurity particles in the water. The two-stage dewatering method of the screw sludge dewaterer 4 and the mechanical acceleration dewatering effectively removes the sediment content in the wastewater. Using sediment as raw material, directly or after treatment and adding it to the soil, it can effectively improve the physical and chemical properties of the soil (organic matter content, content of essential plant nutrients, cation exchange capacity, soil porosity, soil moisture content, etc.), and realize the improvement and ecological restoration of the soil (such as saline-alkali soil, mine waste land soil, etc.). After multi-stage sedimentation, filtration, and clarification of the raw water, the turbidity is reduced from the highest 40,000 degrees to below 10 degrees, meeting the discharge requirements. Since the first mud outlet 6 is provided with a first mud discharge trough 26 inclined upward on the outside, the muddy water will not overflow from the first mud outlet 6. Under the pushing and stirring of the screw sludge dewaterer 4, the coarser sediment will remain on the first mud blocking net 12, and these sediments can be pushed out of the first mud outlet 6 until they are discharged from the first mud discharge trough 26. The second mud discharge trough 27 is set in the same way. A diversion trough 19 is provided at the bottom of the clarification tank 22 below the dewatering cylinder 13, and a water outlet pipe is provided at the lower end of the diversion trough 19. The utility model can be integrally transferred to the nearby water conservancy channel that needs to treat sludge according to actual needs for on-site treatment, which is more flexible than the traditional method, and two different fineness of mud are produced.

[0021] The first mud blocking net 12 is inclined, and the lower end of the first mud blocking net 12 is close to the mud bin 9, which is beneficial to the sediment flowing towards the mud bin 9.

[0022] The first driving device includes a sludge removal motor 11. A bracket 10 is provided at the top of the sludge bin 9, and the sludge removal motor 11 is fixed on the bracket 10. The output shaft of the sludge removal motor 11 is fixedly connected to the sludge removal rotor 14, and the sludge removal rotor 14 is driven to rotate by the sludge removal motor 11.

[0023] The second driving device includes a scraper motor 18 fixedly arranged below the diversion trough 19. The output shaft of the scraper motor 18 penetrates through the diversion trough 19 and the second sludge blocking net 17 and then is connected to the sludge scraping rotor 23. The casing of the scraper motor 18 is fixed to the device body 1, and the output shaft of the scraper motor 18 is connected to the diversion trough 19 and the second sludge blocking net 17 through sealed bearings.

[0024] The sludge scraping plate 16 is of an arc-shaped structure, which is beneficial to pushing the sludge towards the direction of the second sludge outlet 21.

[0025] The above is only the preferred embodiment of the present utility model.

Claims

1. A mechanical acceleration sludge removal and dredging device for water conservancy channels, characterized in that, It includes a device body (1). A pre-sedimentation tank (2) is arranged at the top of the device body (1). A first sludge outlet (6) is arranged on one side of the upper part of the pre-sedimentation tank (2). An obliquely upward first sludge discharge trough (26) is arranged outside the first sludge outlet (6). A plurality of spiral sludge dewatering devices (4) are arranged at the first sludge outlet (6) in the pre-sedimentation tank (2). A first sludge blocking net (12) is arranged below the plurality of spiral sludge dewatering devices (4). Sludge discharge troughs (25) are arranged on the first sludge blocking net (12) at positions corresponding to each spiral sludge dewatering device (4). A water seepage net (7) is arranged at the lower part inside the pre-sedimentation tank (2). An initial water outlet (8) is arranged at the bottom of the pre-sedimentation tank (2). A clarification tank (22) is arranged on one side of the device body (1). A sludge bin (9) is arranged at the top of the clarification tank (22). The sludge bin (9) is communicated with the bottom of the pre-sedimentation tank (2). The bottom of the sludge bin (9) is open, and a sludge dewatering cylinder (13) is fixed at the opening. The upper end of the sludge dewatering cylinder (13) is open, and a second sludge blocking net (17) is arranged at the lower end of the sludge dewatering cylinder (13). Clear water overflow holes (15) are arranged on the upper part of the cylinder wall of the sludge dewatering cylinder (13). A sludge dewatering rotor (14) is arranged inside the sludge dewatering cylinder (13). A cylindrical damping net three (24) is arranged at the top of the sludge dewatering rotor (14). A plurality of sludge passing holes are formed in the sludge dewatering rotor (14). The sludge dewatering rotor (14) is connected with a first driving device. A sludge scraping rotor (23) is arranged at the bottom inside the sludge dewatering cylinder (13). A plurality of sludge scraping plates (16) are arranged on the sludge scraping rotor (23). The sludge scraping rotor (23) is connected with a second driving device. A second sludge outlet (21) is arranged on the side wall of the lower part of the sludge dewatering cylinder (13) corresponding to the sludge scraping rotor (23). An obliquely upward second sludge discharge trough (27) is arranged at the second sludge outlet (21).

2. The mechanical acceleration sludge removal and dredging device for a water conservancy channel according to claim 1, characterized in that, A diversion trough (19) is arranged at the bottom of the clarification tank (22) below the sludge dewatering cylinder (13). A water outlet pipe is arranged at the lower end of the diversion trough (19).

3. A mechanical acceleration sludge removal and silt cleaning device for a water conservancy channel according to claim 1, characterized in that, The first sludge blocking net (12) is arranged obliquely, and the lower end of the first sludge blocking net (12) is close to the sludge bin (9).

4. A mechanical acceleration sludge removal and dredging device for a water conservancy channel according to claim 1, characterized in that, The first driving device includes a sludge dewatering motor (11). A bracket (10) is arranged at the top of the sludge bin (9). The sludge dewatering motor (11) is fixed on the bracket (10), and the output shaft of the sludge dewatering motor (11) is fixedly connected with the sludge dewatering rotor (14).

5. A mechanical acceleration sludge removal and dredging device for a water conservancy channel according to claim 2, characterized in that, The second driving device includes that a scraper motor (18) is fixedly arranged below the diversion trough (19). The output shaft of the scraper motor (18) penetrates through the diversion trough (19) and the second sludge blocking net (17) and then is connected with the sludge scraping rotor (23).

6. A mechanical acceleration sludge removal and dredging device for a water conservancy channel according to claim 1, characterized in that, The sludge scraping plate (16) is of an arc-shaped structure.

7. A mechanical acceleration sludge removal and dredging device for a water conservancy channel according to claim 1, characterized in that, An initial filter screen (3) is arranged at the upper part inside the pre-sedimentation tank (2).

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