High-turbidity wastewater treatment equipment

Abstract

The invention discloses high-turbidity wastewater treatment equipment, and belongs to the technical field of wastewater treatment. The equipment comprises a dosing stirring device, a precipitation device, a solid-liquid separation conveyor and a dehydration device, the precipitation device is communicated with the interior of the dosing stirring device through a water distribution pipe, a slurry lifting assembly is arranged in the precipitation device, an outlet of the slurry lifting assembly extends out of the precipitation device, and the solid-liquid separation conveyor is arranged in the precipitation device. The slurry is conveyed to the slurry conveying device and extends to the position over the solid-liquid separation conveyor, the solid-liquid separation conveyor conveys the slurry to the dewatering device, and the dewatering device conducts dewatering treatment on the slurry. The silt in the raw water does not need to be crushed by using a crushing cutter group and the like, so that the service life of the equipment is prolonged; sediment deposited at the bottom of the sedimentation device is lifted and conveyed to the solid-liquid separation conveyor through the slurry lifting assembly regularly, the sediment at the bottom of the sedimentation device can be automatically cleaned without shutting down the equipment, and the wastewater treatment efficiency of the equipment is remarkably improved.

Description

Technical Field

[0001] The present invention relates to a high-turbidity wastewater treatment device, belonging to the technical field of wastewater treatment. Background Art

[0002] Chamber excavation is a common construction content in water conservancy and hydropower projects. Especially during the excavation of chamber structures such as underground powerhouses and diversion tunnels of hydropower stations, a large amount of rock debris and sediment are usually carried in the construction wastewater after dust reduction, equipment cooling, or mechanical lubrication, further forming high-turbidity construction wastewater. Sometimes the turbidity even reaches several thousand NTU, far exceeding the turbidity range of natural water bodies. If the untreated high-turbidity construction wastewater is directly discharged into the surrounding water bodies, it will quickly change the physical properties of the surrounding water bodies, making the surrounding water bodies turbid and the transparency decreasing, further affecting the photosynthesis of aquatic plants, inhibiting the growth of aquatic plants, and ultimately destroying the food chain balance of the aquatic ecosystem. Therefore, it is necessary to treat the high-turbidity wastewater formed during chamber excavation to meet the reclaimed water quality standard or discharge requirements.

[0003] Chinese patent document with the publication number CN117164148A discloses an integrated high-turbidity sewage treatment device, including a sedimentation and crushing tank, a chemical dosing and filtration tank, and a purified water filtration tank. A crushing and filtration mechanism is arranged on the sedimentation and crushing tank, a stirring and sedimentation mechanism is arranged on the chemical dosing and filtration tank, and a purified water filtration component is arranged on the purified water filtration tank. The crushing and filtration mechanism includes an inlet pipe arranged on one side of the sedimentation and crushing tank, heating plates are fixedly connected to the left and right inner walls of the sedimentation and crushing tank, a crushing knife group is arranged on the inner wall of the sedimentation and crushing tank, and a feeding and filtering pipe is inserted into the top of the sedimentation and crushing tank. By setting the crushing and filtration mechanism, it is convenient to carry out crushing, filtration, and chemical dosing simultaneously during use, enhancing the efficiency of sewage treatment. The feeding and filtering pipe can also be taken out and disassembled for cleaning to reduce the situation of large deviation and uneven feeding.

[0004] However, the integrated high-turbidity sewage treatment device still has the following deficiencies:

[0005] First, when the sediment content in high-turbidity sewage is too high, it will accelerate the wear of the crushing knife group, resulting in a significant shortening of the service life of the crushing knife group;

[0006] Second, it is necessary to shut down the device at regular intervals to take out and clean the sediment in the pick-and-place bin, resulting in a significant reduction in the sewage treatment efficiency of the device. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a high-turbidity wastewater treatment device.

[0008] The present invention is achieved through the following technical solutions:

[0009] A high-turbidity wastewater treatment device, comprising a chemical dosing and stirring device, a precipitation device, a solid-liquid separation conveyor and a dehydration device. The precipitation device is internally connected to the chemical dosing and stirring device through a water distribution pipe. A slurry lifting assembly is provided in the precipitation device. The outlet of the slurry lifting assembly extends outside the precipitation device and extends directly above the solid-liquid separation conveyor. The solid-liquid separation conveyor conveys the slurry to the dehydration device, and the dehydration device dehydrates the slurry.

[0010] The chemical dosing and stirring device includes a stirring tank. At the top inside the stirring tank, there is an equipment bin, and inside the stirring tank, a mixing bin is provided below the equipment bin. Inside the equipment bin, there is a PLC control cabinet A, a chemical dosing assembly and a stirring assembly. Both the chemical dosing assembly and the stirring assembly partially extend into the mixing bin and are electrically connected to the PLC control cabinet A. One side of the mixing bin is connected to the water distribution pipe. On the opposite side of the water distribution pipe on the mixing bin, there is a water inlet pipe. A flow meter is installed on the water inlet pipe, and the flow meter is electrically connected to the PLC control cabinet A. A turbidity meter is provided inside the mixing bin, and the turbidity meter is electrically connected to the PLC control cabinet A.

[0011] The flow meter is an ultrasonic flow meter;

[0012] The chemical dosing assembly includes a chemical liquid storage tank and a chemical dosing pipe. The chemical liquid storage tank is provided inside the equipment bin. One end of the chemical dosing pipe is connected to the bottom of the chemical liquid storage tank, and the other end extends into the mixing bin. A metering pump is installed on the chemical dosing pipe, and the metering pump is located inside the equipment bin;

[0013] The stirring assembly includes a stirring motor and stirring blades. The stirring motor is located inside the equipment bin, and the stirring blades are located inside the mixing bin. The stirring blades are connected to the output shaft of the stirring motor through a stirring drive shaft.

[0014] The precipitation device is a three-compartment sedimentation tank, including a primary sedimentation tank, a secondary sedimentation tank and a tertiary sedimentation tank arranged in sequence. The primary sedimentation tank is connected to the water distribution pipe. An overflow opening A is provided at the upper part of the partition between the secondary sedimentation tank and the primary sedimentation tank. An overflow opening B is provided at the lower part of the partition between the tertiary sedimentation tank and the secondary sedimentation tank. And an outlet pipe is connected to the tertiary sedimentation tank on the opposite side of the overflow opening B.

[0015] The bottoms of the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank are all structures that gradually shrink in shape and size from top to bottom;

[0016] At the inner bottom of the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank, there are all sludge collection pits and sludge collection grooves. The sludge collection pits are arranged close to the side wall of the three-compartment sedimentation tank. The sludge collection grooves are arranged horizontally along the three-compartment sedimentation tank. One end of the sludge collection groove is connected to the sludge collection pit, and the other end extends upward relative to the sludge collection pit;

[0017] The mud lifting assembly includes three mud pumps, which are respectively installed in the mud collecting pools at the bottoms of the primary sedimentation tank, the secondary sedimentation tank, and the tertiary sedimentation tank. A mud pipe is connected to each mud pump, and the end of the mud pipe far from the mud pump extends above the solid-liquid separation conveyor.

[0018] The solid-liquid separation conveyor includes a concrete foundation A and a stainless steel mesh belt conveyor installed on the concrete foundation A. The mesh belt surface of the stainless steel mesh belt conveyor is coated with a polypropylene filter cloth A. A U-shaped mud guide plate is inclined at one end of the frame of the stainless steel mesh belt conveyor close to the dehydration device.

[0019] It also includes a water collection tank and several negative pressure suction components. The water collection tank is arranged on the frame of the stainless steel mesh belt conveyor and is located inside the mesh belt. The top side of the water collection tank is open and is in contact with the mesh belt. A water collection pipe is provided at the bottom of the water collection tank, and a valve is installed on the water collection pipe. Several negative pressure suction components are all communicated with the inside of the water collection tank;

[0020] The negative pressure suction component includes a PLC control cabinet B, a draft fan, and multiple porous air extraction discs. The draft fan is electrically connected to the PLC control cabinet B. Multiple porous air extraction discs are all arranged on the side wall of the water collection tank and are all communicated with the inside of the water collection tank, and the porous air extraction discs are connected to the draft fan through air extraction pipes.

[0021] The dehydration device includes a concrete foundation B, a feed pipe, a blanking pipe, a rotary dehydrator, and a drive component. The feed pipe and the blanking pipe are both arranged on the concrete foundation B. The blanking pipe is coaxially arranged with the feed pipe, and the blanking pipe is located below the feed pipe. One end of the rotary dehydrator is rotatably connected to the feed pipe, and the other end is rotatably connected to the blanking pipe. The drive component is arranged on the concrete foundation B and drives the rotary dehydrator to rotate.

[0022] A plurality of guide plates are arranged in the feed pipe in a staggered and inclined manner;

[0023] A spiral plate is arranged inside the dehydration cylinder;

[0024] Both ends of the rotary dehydrator are respectively rotatably connected to the feed pipe and the blanking pipe through bearings.

[0025] The rotary dehydrator includes a dehydration cylinder and a housing arranged outside the dehydration cylinder. The housing is coaxially arranged with the dehydration cylinder. A plurality of water passing holes are staggeredly opened on the dehydration cylinder, and the water passing holes are located inside the housing. The outer wall of the dehydration cylinder is coated with a polypropylene filter cloth B, and the polypropylene filter cloth B is located inside the housing;

[0026] A water collection tank is provided at the lower end of the housing;

[0027] Driven gears are sleeved at both ends of the dehydration cylinder. The driving assembly includes a double-shaft motor, and driving gears are sleeved at both ends of the double-shaft motor. The driving gears at both ends of the double-shaft motor are meshed with the driven gears at both ends of the dehydration cylinder in one-to-one correspondence.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. There is no need to use a crushing knife set or the like to crush the sediment in the raw water, which extends the service life of the equipment; the sediment deposited at the bottom of the sedimentation device is regularly lifted and conveyed to the solid-liquid separation conveyor by the mud lifting assembly, and the automatic cleaning of the sediment at the bottom of the sedimentation device can be realized without shutting down the equipment, significantly improving the wastewater treatment efficiency of the equipment. First, the solid-liquid separation conveyor is used to separate the sediment and water to reduce the water content of the sediment, and then the dehydration device is used to dehydrate the sediment, further significantly reducing the water content of the sediment. The dehydrated sediment is transported to the waste residue yard, realizing the full-process automatic operation of wastewater treatment, while ensuring the effluent water quality and significantly reducing the labor intensity of workers.

[0030] 2. While the raw water enters the mixing bin through the water inlet pipe, the ultrasonic flowmeter is used to detect the flow rate of the raw water and transmit the relevant information to the PLC control cabinet A; at the same time, the turbidity meter is used to detect the turbidity of the raw water in the mixing bin and transmit the relevant information to the PLC control cabinet A; then, the PLC control cabinet A calculates the amount of raw water entering the mixing bin according to the preset program and algorithm, and automatically calculates the amount of flocculant required for this raw water; next, the metering pump quantitatively adds the flocculant in the liquid medicine storage tank into the raw water in the mixing bin according to the amount of flocculant added calculated by the PLC control cabinet A, which can not only ensure the flocculation effect of the raw water, reduce the consumption of flocculant, but also improve the wastewater treatment efficiency and operation convenience of the equipment; at the same time, the stirring motor drives the stirring blades to rotate through the drive shaft, so that the raw water and the flocculant are fully mixed evenly to improve the flocculation and sedimentation efficiency of the raw water.

[0031] 3. The bottoms of the first-level sedimentation tank, the second-level sedimentation tank and the third-level sedimentation tank are all structures with gradually shrinking shapes and sizes from top to bottom, which is convenient for the sediment to be concentrated at the bottom of the three-compartment sedimentation tank. A sludge sump is arranged at the bottom of the first-level sedimentation tank, the second-level sedimentation tank and the third-level sedimentation tank, and a sludge trough is inclined and communicated with the sludge sump, so that the deposited sediment gradually gathers in the sludge sump. The sediment at the bottoms of the first-level sedimentation tank, the second-level sedimentation tank and the third-level sedimentation tank is regularly pumped to the solid-liquid separation conveyor by three mud pumps respectively, and the automatic cleaning of the sediment at the bottom of the sedimentation device can be realized without shutting down the equipment, significantly improving the wastewater treatment efficiency of the equipment.

[0032] 4. Use a blower fan to extract the air within the space enclosed by the water collection tank and the mesh belt, so as to create a negative pressure environment within this space. Thus, under the action of atmospheric pressure, the water in the sediment can quickly seep through the polypropylene filter cloth A to achieve sediment dehydration, with the aim of improving the sediment dehydration efficiency and the equipment wastewater treatment effect.

[0033] 5. Install a spiral plate inside the dehydration cylinder to divide the internal space of the dehydration cylinder into a spiral channel. Through this spiral channel, the residence time of the sediment within the dehydration cylinder can be extended, thereby fully utilizing the rotational centrifugal force to fully remove the water in the sediment and significantly reducing the moisture content of the sediment. Brief Description of the Drawings

[0034] Figure 1 is a top view structural schematic diagram of the present invention;

[0035] Figure 2 is a cross-sectional view of the present invention;

[0036] Figure 3 is Figure 1 a cross-sectional view along B-B.

[0037] In the figures: 100 - chemical dosing and stirring device, 200 - precipitation device, 300 - solid-liquid separation conveyor, 400 - dehydration device, 1 - flowmeter, 2 - stirring tank, 3 - PLC control cabinet A, 4 - water inlet pipe, 5 - stirring blade, 6 - turbidimeter, 7 - chemical dosing pipe, 8 - liquid medicine storage tank, 9 - metering pump, 10 - water distribution pipe, 11 - sludge collection tank, 12 - concrete foundation A, 13 - slurry pump, 14 - slurry pipe, 15 - sludge collection pond, 16 - water outlet pipe, 17 - blower fan, 18 - PLC control cabinet B, 19 - air duct, 20 - concrete foundation B, 21 - stainless steel mesh belt conveyor, 22 - porous air extraction plate, 23 - U-shaped mud guide plate, 24 - rotary dehydrator, 25 - stirring motor, 26 - stirring drive shaft, 27 - water passing port A, 28 - water passing port B, 29 - water collection tank, 30 - water collection pipe, 31 - mesh belt, 32 - polypropylene filter cloth A, 33 - material guide plate, 34 - bearing, 35 - driven gear, 36 - driving gear, 37 - double-shaft motor, 39 - polypropylene filter cloth B, 40 - spiral plate, 41 - dehydration cylinder, 42 - blanking pipe, 43 - outer shell, 44 - water collection trough, 45 - feed pipe. Detailed Embodiments

[0038] The technical solutions of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0039] As Figures 1 to 3As shown in the figure, a high-turbidity wastewater treatment device of the present invention includes a chemical dosing and stirring device 100, a sedimentation device 200, a solid-liquid separation conveyor 300, and a dehydration device 400. The sedimentation device 200 is internally connected to the chemical dosing and stirring device 100 through a water distribution pipe 10. A mud lifting assembly is provided in the sedimentation device 200. The outlet of the mud lifting assembly extends outside the sedimentation device 200 and extends directly above the solid-liquid separation conveyor 300. The solid-liquid separation conveyor 300 conveys the mud to the dehydration device 400, and the dehydration device 400 dehydrates the mud. When in use, after the raw water enters the chemical dosing and stirring device 100, a chemical agent is added to the raw water through the chemical dosing and stirring device 100, and the raw water and the chemical agent are fully mixed to improve the flocculation and sedimentation effects of the sediment in the raw water. Then, the raw water flows into the sedimentation device 200 through the water distribution pipe 10, and the sediment in the raw water gradually deposits at the bottom of the sedimentation device 200. The sediment deposited at the bottom of the sedimentation device 200 is regularly lifted and conveyed to the solid-liquid separation conveyor 300 through the mud lifting assembly. The solid-liquid separation of the sediment and water is carried out through the solid-liquid separation conveyor 300 to reduce the water content of the sediment. Next, the sediment enters the dehydration device 400 for dehydration, further reducing the water content of the sediment.

[0040] There is no need to use a crushing knife group or the like to crush the sediment in the raw water, which prolongs the service life of the equipment. The sediment deposited at the bottom of the sedimentation device 200 is regularly lifted and conveyed to the solid-liquid separation conveyor 300 through the mud lifting assembly, and the automatic cleaning of the sediment at the bottom of the sedimentation device 200 can be realized without shutting down the equipment, significantly improving the wastewater treatment efficiency of the equipment. First, the solid-liquid separation of the sediment and water is carried out through the solid-liquid separation conveyor 300 to reduce the water content of the sediment, and then the sediment is dehydrated through the dehydration device 400, further significantly reducing the water content of the sediment. The dehydrated sediment is transported to the waste slag yard, realizing the full-process automatic operation of wastewater treatment. While ensuring the effluent water quality, the labor intensity of workers is significantly reduced.

[0041] The chemical dosing and stirring device 100 includes a stirring tank 2. An equipment bin is provided at the top inside the stirring tank 2, and a mixing bin is provided below the equipment bin in the stirring tank 2. A PLC control cabinet A3, a chemical dosing component, and a stirring component are provided in the equipment bin. The chemical dosing component and the stirring component both partially extend into the mixing bin and are both electrically connected to the PLC control cabinet A3. One side of the mixing bin is connected to the water distribution pipe 10. A water inlet pipe 4 is connected to the mixing bin on the opposite side of the water distribution pipe 10. A flow meter 1 is installed on the water inlet pipe 4, and the flow meter 1 is electrically connected to the PLC control cabinet A3. A turbidity meter 6 is provided in the mixing bin, and the turbidity meter 6 is electrically connected to the PLC control cabinet A3. When in use, the raw water enters the mixing bin through the water inlet pipe 4. The chemical dosing component adds a chemical agent to the raw water in the mixing bin, and the stirring component fully mixes the raw water and the chemical agent evenly to improve the flocculation and sedimentation effects of the sediment in the raw water.

[0042] The flowmeter 1 is an ultrasonic flowmeter;

[0043] The chemical dosing assembly includes a chemical liquid storage tank 8 and a chemical dosing pipeline 7. The chemical liquid storage tank 8 is arranged in the equipment bin. One end of the chemical dosing pipeline 7 is connected to the bottom of the chemical liquid storage tank 8, and the other end extends into the mixing bin. A metering pump 9 is installed on the chemical dosing pipeline 7, and the metering pump 9 is located in the equipment bin;

[0044] The stirring assembly includes a stirring motor 25 and stirring blades 5. The stirring motor 25 is located in the equipment bin, the stirring blades 5 are located in the mixing bin, and the stirring blades 5 are connected to the output shaft of the stirring motor 25 through a stirring drive shaft 26. During use, both the metering pump and the stirring motor 25 are electrically connected to the PLC control cabinet A3. While the raw water enters the mixing bin through the water inlet pipe 4, the flow rate of the raw water is detected by the ultrasonic flowmeter and the relevant information is transmitted to the PLC control cabinet A3; meanwhile, the turbidity of the raw water in the mixing bin is detected by the turbidity meter 6 and the relevant information is transmitted to the PLC control cabinet A3; then, the PLC control cabinet A3 calculates the amount of raw water entering the mixing bin according to the preset program and algorithm, and automatically calculates the amount of flocculant required for this raw water; next, the metering pump 9 quantitatively adds the flocculant in the chemical liquid storage tank 8 into the raw water in the mixing bin according to the amount of flocculant added calculated by the PLC control cabinet A3, which can not only ensure the flocculation effect of the raw water, but also reduce the consumption of flocculant, and improve the wastewater treatment efficiency and operation convenience of the equipment; at the same time, the stirring motor 25 drives the stirring blades 5 to rotate through the drive shaft 26, so that the raw water and the flocculant are fully mixed evenly to improve the flocculation and precipitation efficiency of the raw water.

[0045] The sedimentation device 200 is a three-compartment sedimentation tank, including a primary sedimentation tank, a secondary sedimentation tank, and a tertiary sedimentation tank arranged in sequence. The primary sedimentation tank is connected to the water distribution pipe 10. An overflow port A27 is opened in the upper part of the partition between the secondary sedimentation tank and the primary sedimentation tank. An overflow port B28 is opened in the lower part of the partition between the tertiary sedimentation tank and the secondary sedimentation tank. And a water outlet pipe 16 is connected to the opposite side of the overflow port B28 on the tertiary sedimentation tank. During use, electric ball valves are installed on both the water distribution pipe 10 and the water outlet pipe 16, and the electric ball valves are electrically connected to the PLC control cabinet A3. The raw water in the mixing bin is introduced into the bottom of the primary sedimentation tank through the water distribution pipe 10. After the wastewater stays in the primary sedimentation tank for sedimentation for a period of time, it flows into the secondary sedimentation tank through the overflow port A27. After the wastewater stays in the secondary sedimentation tank for sedimentation for a period of time, it flows into the tertiary sedimentation tank through the overflow port B28. After the wastewater stays in the tertiary sedimentation tank for sedimentation for a period of time, the obtained clear water flows into the recycled water pipeline through the water outlet pipe 16 and is pumped into the recycled water system for recycling or external discharge.

[0046] The bottoms of the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank are all structures that gradually taper in shape and size from top to bottom;

[0047] At the bottoms inside the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank, there are sludge collection pits 15 and sludge collection troughs 11. The sludge collection pits 15 are arranged close to the side walls of the three-compartment sedimentation tank. The sludge collection troughs 11 are arranged horizontally along the three-compartment sedimentation tank. One end of the sludge collection trough 11 is connected to the sludge collection pit 15, and the other end extends upward relative to the sludge collection pit 15;

[0048] The sludge lifting assembly includes three sludge pumps 13. The three sludge pumps 13 are respectively installed in the sludge collection pits 15 at the bottoms of the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank. A sludge pipe 14 is connected to each sludge pump 13, and the end of the sludge pipe 14 far from the sludge pump 13 extends above the solid-liquid separation conveyor 300. During use, the three sludge pumps 13 are all electrically connected to the PLC control cabinet B18. The bottoms of the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank are all structures that gradually taper in shape and size from top to bottom, which is convenient for sediment to accumulate at the bottom of the three-compartment sedimentation tank. Sludge collection pits 15 are arranged at the bottoms of the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank, and the sludge collection troughs 11 are inclined to communicate with the sludge collection pits 15, so that the deposited sediment gradually accumulates in the sludge collection pits 15. The sediment at the bottoms of the first-stage sedimentation tank, the second-stage sedimentation tank, and the third-stage sedimentation tank is regularly pumped to the solid-liquid separation conveyor 300 by the three sludge pumps 13 respectively, and the automatic cleaning of the sediment at the bottom of the sedimentation device 200 can be realized without shutting down the equipment, significantly improving the wastewater treatment efficiency of the equipment.

[0049] The solid-liquid separation conveyor 300 includes a concrete foundation A12 and a stainless steel mesh belt conveyor 21 installed on the concrete foundation A12. A polypropylene filter cloth A32 is coated on the surface of the mesh belt 31 of the stainless steel mesh belt conveyor 21. At one end of the frame of the stainless steel mesh belt conveyor 21 close to the dehydration device 400, a U-shaped mud guide plate 23 is inclined. During use, the water in the sediment seeps through the polypropylene filter cloth A32, so as to realize solid-liquid separation and achieve the purpose of reducing the moisture content of the sediment.

[0050] It also includes a water collection tank 29 and a plurality of negative pressure suction assemblies. The water collection tank 29 is arranged on the frame of the stainless steel mesh belt conveyor 21 and is located inside the mesh belt 31. The top side of the water collection tank 29 is open and is in contact with the mesh belt 31. A water collection pipe 30 is provided at the bottom of the water collection tank 29, and a valve is installed on the water collection pipe 30. The plurality of negative pressure suction assemblies are all communicated with the inside of the water collection tank 29;

[0051] The negative pressure suction assembly includes a PLC control cabinet B18, a draft fan 17, and a plurality of porous air extraction discs 22. The draft fan 17 is electrically connected to the PLC control cabinet B18. The plurality of porous air extraction discs 22 are all arranged on the side wall of the water collection tank 29 and are all communicated with the inside of the water collection tank 29. Moreover, the porous air extraction discs 22 are connected to the draft fan 17 through an air duct 19. During use, the draft fan 17 is used to suck away the air in the space surrounded by the water collection tank 29 and the mesh belt 31, so as to create a negative pressure environment in this space. Thus, under the action of the atmospheric pressure, the water in the sediment can quickly seep through the polypropylene filter cloth A32 to achieve sediment dehydration, so as to achieve the purpose of improving the sediment dehydration efficiency and the equipment wastewater treatment effect. The separated water enters the water collection tank 29 and is led out through a water collection pipe 30 for recycling.

[0052] The dehydration device 400 includes a concrete foundation B20, a feed pipe 45, a blanking pipe 42, a rotary dehydrator 24, and a driving assembly. The feed pipe 45 and the blanking pipe 42 are both arranged on the concrete foundation B20. The blanking pipe 42 is coaxially arranged with the feed pipe 45, and the blanking pipe 42 is located below the feed pipe 45. One end of the rotary dehydrator 24 is rotatably connected to the feed pipe 45, and the other end is rotatably connected to the blanking pipe 42. The driving assembly is arranged on the concrete foundation B20 and drives the rotary dehydrator 24 to rotate. The sediment dehydrated by the solid-liquid separation conveyor 300 enters the feed pipe 45 along the mud guide plate 23, then falls into the rotary dehydrator 24, and slides downward along the spiral plate 40. At the same time, the driving assembly drives the rotary dehydrator 24 to rotate to dehydrate the sediment, and the obtained mud cake after dehydration falls out from the blanking pipe 42.

[0053] A plurality of guide plates 33 are arranged in the feed pipe 45 in a staggered and inclined manner;

[0054] A spiral plate 40 is arranged in the dehydration cylinder 41;

[0055] Both ends of the rotary dehydrator 24 are rotatably connected to the feed pipe 45 and the blanking pipe 42 through bearings 34 respectively.

[0056] The rotary dehydrator 24 includes a dehydration cylinder 41 and a housing 43 arranged outside the dehydration cylinder 41. The housing 43 is coaxially arranged with the dehydration cylinder 41. A plurality of water passing holes are staggeredly opened on the dehydration cylinder 41, and the water passing holes are located inside the housing 43. A polypropylene filter cloth B39 is coated on the outer wall of the dehydration cylinder 41, and the polypropylene filter cloth B39 is located inside the housing 43;

[0057] A water collection tank 44 is arranged at the lower end of the housing 43;

[0058] Both ends of the dehydration cylinder 41 are sleeved with driven gears 35. The driving assembly includes a double-shaft motor 37. Both ends of the double-shaft motor 37 are sleeved with driving gears 36, and the driving gears 36 at both ends of the double-shaft motor 37 are in one-to-one meshing with the driven gears 35 at both ends of the dehydration cylinder 41. A spiral plate 40 is arranged inside the dehydration cylinder 41 to divide the internal space of the dehydration cylinder 41 into a spiral channel. Through this spiral channel, the residence time of the sediment in the dehydration cylinder 41 can be prolonged, so as to fully utilize the rotational centrifugal force to fully remove the water in the sediment, and the water content of the sediment can be significantly reduced; and the discharged water is concentrated in the water collecting tank 44 and can be led out for recycling or directly discharged externally.

[0059] The working principle of the high-turbidity wastewater treatment equipment provided by the present invention is as follows:

[0060] While the raw water enters the mixing chamber through the water inlet pipe 4, the flow rate of the raw water is detected by an ultrasonic flowmeter, and the relevant information is transmitted to the PLC control cabinet A3; at the same time, the turbidity of the raw water is detected by a turbidimeter 6, and the relevant information is transmitted to the PLC control cabinet A3; then the PLC control cabinet A3 calculates the amount of the raw water entering the mixing chamber according to the preset program and algorithm, and automatically calculates the amount of the flocculant required for these raw waters; next, the metering pump 9 quantitatively adds the flocculant in the liquid medicine storage tank 8 into the raw water in the mixing chamber according to the amount of the flocculant calculated by the PLC control cabinet A3, which can not only ensure the flocculation effect of the raw water, but also reduce the consumption of the flocculant, and improve the wastewater treatment efficiency and operation convenience of the equipment; at the same time, the stirring motor 25 drives the stirring blades 5 to rotate through the drive shaft 26, so that the raw water and the flocculant are fully mixed evenly to improve the flocculation and sedimentation efficiency of the raw water.

[0061] The raw water in the mixing chamber is introduced into the bottom of the primary sedimentation tank through the water distribution pipe 10. After the wastewater stays in the primary sedimentation tank for sedimentation for a period of time, it flows into the secondary sedimentation tank from the water passing port A27. After the wastewater stays in the secondary sedimentation tank for sedimentation for a period of time, it flows into the tertiary sedimentation tank from the water passing port B28. After the wastewater stays in the tertiary sedimentation tank for sedimentation for a period of time, the obtained clear water flows into the reuse water pipeline through the water outlet pipe 16 and is sent to the reuse water system by a pipeline pump for recycling or external discharge. Through three slurry pumps 13, the sediment at the bottom of the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank is regularly pumped to the solid-liquid separation conveyor 300, and the sediment at the bottom of the sedimentation device 200 can be automatically cleaned without shutting down the equipment, which significantly improves the wastewater treatment efficiency of the equipment.

[0062] The water in the sediment on the solid-liquid separation conveyor 300 infiltrates downward through the polypropylene filter cloth A32, thereby realizing solid-liquid separation and achieving the purpose of reducing the water content of the sediment. At the same time, the air in the space surrounded by the water collection tank 29 and the mesh belt 31 is sucked away by the induced draft fan 17 to create a negative pressure environment in this space, so that the water in the sediment quickly infiltrates through the polypropylene filter cloth A32 under the action of the atmospheric pressure, so as to realize the dehydration of the sediment and achieve the purpose of improving the sediment dehydration efficiency and the equipment wastewater treatment effect. The separated water enters the water collection tank 29 and is led out through the water collection pipe 30 for recycling.

[0063] The sediment dehydrated by the solid-liquid separation conveyor 300 enters the feed pipe 45 along the mud guide plate 23, then falls into the rotary dehydrator 24, and slides downward along the spiral plate 40. At the same time, the driving assembly drives the rotary dehydrator 24 to rotate to dehydrate the sediment, and the dehydrated cake falls out from the blanking pipe 42. The separated water is concentrated in the water collection tank 44 and can be led out for recycling or directly discharged.

Claims

1. A high-turbidity wastewater treatment device, characterized in that: It includes a chemical dosing and mixing device (100), a sedimentation device (200), a solid-liquid separation conveyor (300) and a dehydration device (400). The sedimentation device (200) is internally connected to the chemical dosing and mixing device (100) through a water distribution pipe (10). A slurry lifting assembly is provided in the sedimentation device (200). The outlet of the slurry lifting assembly extends outside the sedimentation device (200) and extends directly above the solid-liquid separation conveyor (300). The solid-liquid separation conveyor (300) conveys the slurry to the dehydration device (400), and the dehydration device (400) dehydrates the slurry.

2. The high-turbidity wastewater treatment equipment according to claim 1, characterized in that: The chemical dosing and mixing device (100) includes a mixing tank (2). There is an equipment bin at the top inside the mixing tank (2), and a mixing bin is provided below the equipment bin inside the mixing tank (2). A PLC control cabinet A (3), a chemical dosing assembly and a mixing assembly are provided in the equipment bin. The chemical dosing assembly and the mixing assembly both partially extend into the mixing bin and are electrically connected to the PLC control cabinet A (3). One side of the mixing bin is connected to the water distribution pipe (10). An inlet pipe (4) is connected to the mixing bin on the opposite side of the water distribution pipe (10). A flow meter (1) is installed on the inlet pipe (4), and the flow meter (1) is electrically connected to the PLC control cabinet A (3). A turbidity meter (6) is provided in the mixing bin, and the turbidity meter (6) is electrically connected to the PLC control cabinet A (3).

3. The high-turbidity wastewater treatment equipment according to claim 2, wherein: The flow meter (1) is an ultrasonic flow meter; The chemical dosing assembly includes a liquid medicine storage tank (8) and a chemical dosing pipe (7). The liquid medicine storage tank (8) is provided in the equipment bin. One end of the chemical dosing pipe (7) is connected to the bottom of the liquid medicine storage tank (8), and the other end extends into the mixing bin. A metering pump (9) is installed on the chemical dosing pipe (7), and the metering pump (9) is located in the equipment bin; The mixing assembly includes a mixing motor (25) and mixing blades (5). The mixing motor (25) is located in the equipment bin, and the mixing blades (5) are located in the mixing bin. The mixing blades (5) are connected to the output shaft of the mixing motor (25) through a mixing drive shaft (26).

4. The high-turbidity wastewater treatment equipment according to claim 1, characterized in that: The sedimentation device (200) is a three-compartment sedimentation tank, including a primary sedimentation tank, a secondary sedimentation tank and a tertiary sedimentation tank arranged in sequence. The primary sedimentation tank is connected to the water distribution pipe (10). An overflow port A (27) is opened in the upper part of the partition between the secondary sedimentation tank and the primary sedimentation tank. An overflow port B (28) is opened in the lower part of the partition between the tertiary sedimentation tank and the secondary sedimentation tank. An outlet pipe (16) is connected to the tertiary sedimentation tank on the opposite side of the overflow port B (28).

5. The high-turbidity wastewater treatment equipment according to claim 4, characterized in that: The bottoms of the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank are all structures that gradually shrink in shape and size from top to bottom; At the bottom inside the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank, there are sediment collection pits (15) and sediment collection troughs (11). The sediment collection pits (15) are arranged close to the side walls of the three-compartment sedimentation tank. The sediment collection troughs (11) are arranged horizontally along the three-compartment sedimentation tank. One end of the sediment collection trough (11) is connected to the sediment collection pit (15), and the other end extends upward relative to the sediment collection pit (15); The slurry lifting assembly includes three slurry pumps (13), which are respectively installed in the sludge sump (15) at the bottom of the primary sedimentation tank, secondary sedimentation tank, and tertiary sedimentation tank. A slurry pipe (14) is connected to each slurry pump (13), and the end of the slurry pipe (14) far from the slurry pump (13) extends above the solid-liquid separation conveyor (300).

6. The high-turbidity wastewater treatment equipment according to claim 1, characterized in that: The solid-liquid separation conveyor (300) includes a concrete foundation A (12) and a stainless steel mesh belt conveyor (21) installed on the concrete foundation A (12). A polypropylene filter cloth A (32) is coated on the surface of the mesh belt (31) of the stainless steel mesh belt conveyor (21). A U-shaped mud guide plate (23) is inclined at one end of the frame of the stainless steel mesh belt conveyor (21) close to the dehydration device (400).

7. The high-turbidity wastewater treatment equipment according to claim 6, characterized in that: It also includes a water collection tank (29) and several negative pressure suction components. The water collection tank (29) is arranged on the frame of the stainless steel mesh belt conveyor (21) and is located inside the mesh belt (31). The top side of the water collection tank (29) is open and is in contact with the mesh belt (31). A water collection pipe (30) is provided at the bottom of the water collection tank (29), and a valve is installed on the water collection pipe (30). Several negative pressure suction components are all communicated with the inside of the water collection tank (29); The negative pressure suction component includes a PLC control cabinet B (18), a blower (17), and multiple porous air extraction discs (22). The blower (17) is electrically connected to the PLC control cabinet B (18). Multiple porous air extraction discs (22) are all arranged on the side wall of the water collection tank (29) and are all communicated with the inside of the water collection tank (29), and the porous air extraction discs (22) are connected to the blower (17) through an air duct (19).

8. The high-turbidity wastewater treatment equipment according to claim 1, characterized in that: The dehydration device (400) includes a concrete foundation B (20), a feed pipe (45), a blanking pipe (42), a rotary dehydrator (24), and a driving component. The feed pipe (45) and the blanking pipe (42) are both arranged on the concrete foundation B (20). The blanking pipe (42) is coaxially arranged with the feed pipe (45), and the blanking pipe (42) is located below the feed pipe (45). One end of the rotary dehydrator (24) is rotatably connected to the feed pipe (45), and the other end is rotatably connected to the blanking pipe (42). The driving component is arranged on the concrete foundation B (20) and drives the rotary dehydrator (24) to rotate.

9. The high-turbidity wastewater treatment equipment according to claim 8, characterized in that: Multiple guide plates (33) are arranged in a staggered and inclined manner in the feed pipe (45); A spiral plate (40) is arranged in the dehydration cylinder (41); Both ends of the rotary dehydrator (24) are rotatably connected to the feed pipe (45) and the blanking pipe (42) through bearings (34) respectively.

10. The high-turbidity wastewater treatment equipment according to claim 8 or 9, characterized in that: The rotary dehydrator (24) includes a dehydration cylinder (41) and a housing (43) arranged outside the dehydration cylinder (41). The housing (43) is coaxially arranged with the dehydration cylinder (41). A plurality of water passing holes are staggeredly arranged on the dehydration cylinder (41), and the water passing holes are located inside the housing (43). A polypropylene filter cloth B (39) is coated on the outer wall of the dehydration cylinder (41), and the polypropylene filter cloth B (39) is located inside the housing (43); A water collecting tank (44) is provided at the lower end of the outer shell (43); Driven gears (35) are sleeved at both ends of the dehydration cylinder (41). The driving assembly includes a double-shaft motor (37). Driving gears (36) are sleeved at both ends of the double-shaft motor (37), and the driving gears (36) at both ends of the double-shaft motor (37) are in one-to-one meshing engagement with the driven gears (35) at both ends of the dehydration cylinder (41).

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