Thickener overflow water treatment system and method

Abstract

The embodiment of the invention discloses a thickener overflow water treatment system and method, and relates to the technical field of solid-liquid separation. The treatment system comprises a sedimentation tank, a clean water tank, a desilting device and a turbidimeter, the sedimentation tank is arranged at the side part of the thickener and is communicated with the clarified water containing part of the thickener through an overflow pipe; the desilting device comprises a first main water pipe, a first main air pipe and a desilting pump; the first main water pipe is communicated with the first water pump and connected with a first branch water pipe, and a water flow nozzle is arranged on the first branch water pipe; the first main air pipe is communicated with the air source pump and is connected with a first branch air pipe, and the first branch air pipe is provided with an airflow nozzle; the inlet end of the desilting pump is communicated with the bottom of the sedimentation tank, and the outlet end of the desilting pump is communicated with a feeding cylinder of the thickener; the turbidimeter is arranged in the sedimentation tank and is used for monitoring the concentration of particulate matters in the overflow water of the thickener in the sedimentation tank. The method is suitable for thickener overflow water treatment scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-liquid separation, and particularly to a thickener overflow water treatment system and method. Background Art

[0002] In many industrial production processes, thickeners play a crucial role. Their main function is to concentrate pulp or other suspensions to effectively separate solid particles from liquids. The overflow water tank, as an important part of the thickener, is responsible for collecting and temporarily storing the overflowed liquid. However, in actual operation, the overflow water tank (also known as the sedimentation tank) often faces the problem of silt accumulation. These silts mainly come from the fine particles that have not completely settled during the thickening process. Over time, they will gradually deposit at the bottom of the overflow water tank, thereby affecting the normal capacity and overflow effect of the overflow water tank, and may even cause the overflow water tank to be blocked, seriously affecting the overall operation efficiency of the thickener.

[0003] The dredging operations of traditional thickener overflow water tanks mostly rely on manual experience or fixed time periods. For example, the pulp-making pump is manually turned on every shift or regular dredging is set daily. Such methods have the defects of over-dredging or under-dredging, and cannot respond in time to sudden siltation, resulting in pipeline blockage or reduced return water quality. The traditional overflow water treatment system relies on manual intervention. The intrusive turbidity probe is easily wrapped by the slurry and needs to be manually disassembled and cleaned, which is time-consuming for maintenance and affects production continuity. Summary of the Invention

[0004] In view of this, the present invention provides a thickener overflow water treatment system and method to facilitate improving the dredging efficiency of the silt at the bottom of the sedimentation tank.

[0005] In a first aspect, the present invention provides a thickener overflow water treatment system, comprising: a sedimentation tank, a clear water tank, a dredging device, and a turbidimeter; the sedimentation tank is arranged at the side of the thickener and is connected to the clarified water containing part of the thickener through an overflow pipe; the clear water tank is arranged at the side of the sedimentation tank, and an overflow wall is arranged between the clear water tank and the sedimentation tank; the height of the overflow wall is lower than the heights of the side walls of the clear water tank and the sedimentation tank; the dredging device includes: a first main water pipe, a first main air pipe, and a dredging pump; the first main water pipe is connected to a first water pump, and the first main water pipe is connected with a first branch water pipe, and a water flow nozzle is arranged on the first branch water pipe; the first main air pipe is connected to an air source pump, and the first main air pipe is connected with a first branch air pipe, and an air flow nozzle is arranged on the first branch air pipe; the water flow nozzle on the first branch water pipe and the air flow nozzle on the first branch air pipe are respectively arranged at the bottom of the sedimentation tank to spray water flow to the bottom of the sedimentation tank through the water flow nozzle and spray air flow to the bottom of the sedimentation tank through the air flow nozzle; the inlet end of the dredging pump is connected to the bottom of the sedimentation tank, and the outlet end of the dredging pump is connected to the feeding cylinder of the thickener; the turbidimeter is arranged in the sedimentation tank and is used for monitoring the concentration of particulate matter in the thickener overflow water in the sedimentation tank.

[0006] Optionally, the water flow nozzle and the air flow nozzle are arranged in a staggered manner in the same plane to form an arrangement angle in the range of 70° to 110°; the water flow sprayed by the water flow nozzle and the air flow sprayed by the air flow nozzle are staggered to form a gas-liquid two-phase turbulent flow.

[0007] Optionally, the inlet end of the dredging pump is connected to the bottom of the sedimentation tank through a pre-pump pipeline; the pre-pump pipeline is connected to the first branch water pipe and the first branch air pipe.

[0008] Optionally, a first electromagnetic valve is arranged on the first main air pipe, and the first electromagnetic valve is connected to the first main air pipe to control the on-off of the air flow in the first main air pipe.

[0009] Optionally, it further includes a turbidimeter cleaning assembly, and the turbidimeter cleaning assembly includes a second main air pipe, a second electromagnetic valve, and a plurality of air jet nozzles; the second main air pipe is connected to the air source pump; the second electromagnetic valve is arranged on the second main air pipe and is connected to the second main air pipe to control the on-off of the air flow in the second main air pipe; the air jet nozzles are annularly arranged around the turbidimeter, and the air jet nozzles are connected to the second main air pipe.

[0010] Optionally, a water overflow outlet is provided at the upper part of the clear water tank; a water outlet is provided at the bottom of the clear water tank, and a first electric ball valve is provided outside the water outlet, and the opening and closing of the water outlet are controlled by the first electric ball valve; a second electric ball valve and a third electric ball valve are provided behind the first electric ball valve, the second electric ball valve is used to control the water from the water outlet for production; the third electric ball valve is connected to the first main water pipe and is used to control the water from the water outlet for making slurry and dredging the bottom sludge of the sedimentation tank.

[0011] Optionally, it further includes: a PLC controller, electrically connected to the turbidimeter, and used to control the start and stop of the dredging operation of the dredging device according to the detection result of the turbidimeter; a remote monitoring module, electrically connected to the PLC controller, and used for viewing cloud data and remote control; the remote monitoring module has two optional networking modes of 4G or Wi-Fi.

[0012] In a second aspect, the present invention provides a method for treating overflow water of a thickener, which is used for the treatment system according to any implementation manner of the first aspect. The treatment method includes the steps of: using the turbidimeter to continuously monitor the concentration of particulate matter in the water body of the sedimentation tank to obtain the turbidity of the water body of the sedimentation tank; controlling the dredging device to perform a dredging operation according to the turbidity of the water body of the sedimentation tank.

[0013] Optionally, the controlling the dredging device to perform a dredging operation according to the turbidity of the water body of the sedimentation tank includes: when the turbidity of the water body of the sedimentation tank exceeds a preset turbidity threshold and the duration exceeds a preset continuous over-standard time threshold, starting the first water pump and the air source pump to start making slurry so that the sediment at the bottom of the sedimentation tank forms slurry, and starting the dredging pump to pump the slurry to the thickener; and / or determining the turbidity change rate of the water body of the sedimentation tank according to the turbidity of the water body of the sedimentation tank, and adjusting the flow rate of the first water pump, the air pressure of the air source pump and the power of the dredging pump according to the turbidity change rate; and / or determining the turbidity meter data classification of the water body of the sedimentation tank according to the turbidity of the water body of the sedimentation tank, and adjusting the power of the first water pump, the air pressure of the air source pump and the power of the dredging pump according to the turbidity meter data classification of the water body of the sedimentation tank.

[0014] Optionally, the method further includes the steps of: automatically opening the turbidimeter cleaning air nozzle to blow gas towards the turbidimeter at regular time intervals to remove the surface attachments of the turbidimeter; closing the turbidimeter cleaning air nozzle when the blowing time reaches a specified time length.

[0015] A thickener overflow water treatment system and method provided by the present invention set a sedimentation tank and a clear water tank, and set an overflow wall between the sedimentation tank and the clear water tank, so that the clear water after filtration and / or sedimentation of the turbid water in the sedimentation tank enters the clear water tank, and the water with a low concentration of particulate matter in the clear water tank can be used for production and / or dredging and slurry making, improving the water resource utilization rate of the overflow water treatment system; the water flow nozzle of the first water pipe in the sedimentation tank sprays water flow and the air flow nozzle of the first air pipe sprays air flow to form a gas-liquid two-phase dredging and slurry making flow, that is, using gas-liquid collaborative slurry making to enhance the suspension ability of the particulate matter deposited at the bottom of the sedimentation tank, so as to facilitate improving the dredging efficiency of the sludge at the bottom of the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the overflow water treatment system of the thickener overflow water tank in an embodiment of the present invention; Figure 2 Schematic diagram of the flow chart of the overflow water treatment method of the thickener overflow water tank in an embodiment of the present invention; Figure 3 Schematic diagram of the staggered arrangement of the first water pipe and the first air pipe nozzle in an embodiment of the present invention; Figure 4 Schematic diagram of the turbidimeter and the turbidimeter cleaning assembly in an embodiment of the present invention; Figure 5 Schematic diagram of the connection between the pipeline before the pump and the first water pipe and the first air pipe in an embodiment of the present invention; In the figure: 1. Sedimentation tank; 2. Clear water tank; 31. First main water pipe; 32. First main air pipe; 33. Dredging pump; 34. First water pump; 35. First water pipe; 36. Air source pump; 37. First air pipe; 38. Pipeline before the pump; 39. Dredging pipe; 4. Turbidimeter; 5. Thickener; 6. Overflow pipe; 7. Overflow wall; 8. High-concentration slurry; 9. Upper liquid; 10. Electric gate valve; 11. First solenoid valve; 12. Turbidimeter cleaning assembly; 121. Second main air pipe; 122. Second solenoid valve; 13. First electric ball valve; 14. Second electric ball valve; 15. Third electric ball valve; 16. Overflow water outlet; 17. Production water pipe; 18. Feeding cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe the embodiments of the present invention in detail with reference to the drawings.

[0019] It should be clear that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0020] Embodiment 1: The present invention provides a thickener overflow water treatment system, including: a sedimentation tank 1, a clear water tank 2, a silt cleaning device, and a turbidimeter 4; the sedimentation tank 1 is arranged on the side of the thickener 5 and is connected to the clarified water containing part of the thickener 5 through an overflow pipe 6; the clear water tank 2 is arranged on the side of the sedimentation tank 1, and an overflow wall 7 is arranged between the clear water tank 2 and the sedimentation tank 1; the height of the overflow wall 7 is lower than the heights of the side walls of the clear water tank 2 and the sedimentation tank 1; the silt cleaning device includes: a first main water pipe 31, a first main air pipe 32, and a silt cleaning pump 33; the first main water pipe 31 is connected to a first water pump 34, and the first main water pipe 31 is connected with a first branch water pipe 35, and a water flow nozzle is arranged on the first branch water pipe 35; the first main air pipe 32 is connected to an air source pump 36, and the first main air pipe 32 is connected with a first branch air pipe 37, and an air flow nozzle is arranged on the first branch air pipe 37; the water flow nozzle on the first branch water pipe 35 and the air flow nozzle on the first branch air pipe 37 are respectively arranged at the bottom of the sedimentation tank 1 to spray water flow to the bottom of the sedimentation tank 1 through the water flow nozzle and spray air flow to the bottom of the sedimentation tank 1 through the air flow nozzle; the inlet end of the silt cleaning pump 33 is connected to the bottom of the sedimentation tank 1; the turbidimeter 4 is arranged in the sedimentation tank 1 and is used for monitoring the concentration of particulate matters in the thickener overflow water in the sedimentation tank 1.

[0021] In this embodiment, the sedimentation tank 1 is arranged on the side of the thickener and is connected to the clarified water containing part of the thickener 5 through the overflow pipe 6. The sedimentation tank 1 is used for storing the overflow water with a relatively high solid content overflowed from the thickener 5 and for static precipitation. The water with a relatively low concentration of particulate matters after the static precipitation of the overflow water enters the clear water tank 2 through the overflow wall 7 for storage. The clear water tank 2 is arranged on the side of the sedimentation tank 1, and the water in the clear water tank 2 can be used for production and / or for making slurry to clean the silt at the bottom of the sedimentation tank; an overflow wall 7 is arranged between the sedimentation tank 1 and the clear water tank 2, and the height of the overflow wall 7 is lower than the heights of the side walls of the clear water tank 2 and the sedimentation tank 1. The overflow wall 7 effectively prevents the un-precipitated water from flowing into the clear water tank 2, ensuring that all impurities and silt are retained in the sedimentation tank 1 for treatment, enabling the effective treatment of the impurities in the sedimentation tank 1 and protecting the subsequent processes from the influence of unpurified water at the same time; such a design can ensure that the quality of the outflow water meets the standards and is helpful for the subsequent treatment of the overflow water; when the thickener 5 performs solid-liquid separation, the high-concentration slurry 8 accumulates in the lower layer, and the upper layer is the upper liquid 9 with a relatively low solid content; when the upper liquid 9 in the thickener 5 is excessive, it overflows from the overflow pipe 6 and flows into the sedimentation tank 1.

[0022] The dredging device includes: a first main water pipe 31, a first main air pipe 32, and a dredging pump 33. The first main water pipe 31 is connected to a first water pump 34 to ensure efficient water flow transmission. After the first water pump 34 is started, the clarified water in the clear water tank 2 is pumped into the sedimentation tank 1 for slurry making. The first main water pipe 31 is connected with a first branch water pipe 35, and a water flow nozzle is provided on the first branch water pipe 35. There can be multiple branch water pipes distributed at the bottom of the sedimentation tank 1.

[0023] The first main air pipe 32 is hermetically connected to an air source pump 36, and the first main air pipe 32 is connected with a first branch air pipe 37. An air flow nozzle is provided on the first branch air pipe 37. There can be multiple branch air pipes distributed at the bottom of the sedimentation tank 1. The water flow nozzle on the first branch water pipe 35 and the air flow nozzle on the first branch air pipe 37 are respectively arranged at the bottom of the sedimentation tank 1. The first branch water pipe 35 sprays water flow towards the bottom of the sedimentation tank 1 through the water flow nozzle, and the first branch air pipe 37 sprays air flow towards the bottom of the sedimentation tank 1 through the air flow nozzle; the first branch water pipe 35 accurately guides the high-pressure water flow in the first main water pipe 31 to the bottom of the sedimentation tank 1 to promote effective stirring of the silt. This split-flow design distributes the water flow in the main water pipe around the bottom of the sedimentation tank 1, making the water flow distribution more uniform and avoiding dead-angle residues; the first branch air pipe 37 accurately guides the high-pressure gas in the first main air pipe 32 to the bottom of the sedimentation tank 1 to promote effective stirring of the silt. That is to say, the water flow nozzle of the first branch water pipe in the sedimentation tank sprays water flow and the air flow nozzle of the first branch air pipe sprays air flow, which can simultaneously shoot towards the bottom of the sedimentation tank. Under the combined action of the two, the silt at the bottom of the sedimentation tank is stirred up (also known as slurry making). In other words, the water flow nozzle of the first branch water pipe in the sedimentation tank sprays water flow and the air flow nozzle of the first branch air pipe sprays air flow, which can form a gas-liquid two-phase dredging and slurry-making flow, that is, utilize gas-liquid collaborative slurry making to enhance the suspension ability of the particulate matter deposited at the bottom of the sedimentation tank, thereby facilitating the improvement of the dredging efficiency of the silt at the bottom of the sedimentation tank.

[0024] The inlet end of the dredging pump 33 is connected to the bottom of the sedimentation tank 1, and the outlet end of the dredging pump 33 is connected to the feeding cylinder 18 of the thickener 5. Specifically, the inlet end of the dredging pump 33 is connected to the bottom of the sedimentation tank 1 through a pre-pump pipeline 38, and the outlet end of the dredging pump 33 is connected to the feeding cylinder 18 of the thickener 5 through a dredging pipe 39. When slurry making in the sedimentation tank 1, the electric gate valve 10 is opened, and the dredging pump 33 is started, so that the slurry in the sedimentation tank 1 flows back from the dredging pipe 39 to the feeding cylinder 18 of the thickener 5 through the pre-pump pipeline 38, and then enters the thickener 5 for re-sedimentation, improving the resource reuse of the slurry, and at the same time, the slurry with a high concentration of particulate matter.

[0025] The turbidimeter 4 is arranged in the sedimentation tank 1 for monitoring the concentration of particulate matter in the overflow water of the thickener in the sedimentation tank 1; the turbidimeter 4 uses a high-precision turbidimeter (range 0 - 1000 ppm, accuracy ±2% FS), which is arranged at the upper part of the sedimentation tank 1. When the turbidity exceeds the standard, it will automatically trigger an audible and visual alarm, and push the alarm information to the management platform through 4G or Wi-Fi network. At the same time, the first water pump 34 and the air source pump 36 of the dredging device are started to make slurry of the sludge in the sedimentation tank 1, and the dredging pump 33 is started to pump the sludge generated by making slurry to the thickener 5 to realize the treatment of the overflow water in the sedimentation tank 1.

[0026] The present invention combines the real-time turbidity monitoring of the turbidimeter 4, and the first water pump 34 and the air source pump 36 cooperate to alternately inject water flow and air flow into the sedimentation tank 1, and realize automatic dredging of the overflow water tank of the thickener through gas-liquid collaborative slurry making and intelligent control technology, significantly reducing the intensity of manual intervention and improving the operation stability and energy efficiency ratio of the thickener; at the same time, the treatment system is linked with the main body of the thickener 5, and in case of abnormality, it can automatically reduce the feeding flow of the thickener 5 or start emergency sludge discharge. Through the technical closed-loop of real-time turbidity monitoring - gas-liquid collaborative dredging - intelligent control - self-cleaning maintenance, the core pain points of "inaccurate measurement, slow dredging, high energy consumption, and difficult management" in the traditional dredging of the overflow water tank of the thickener are overcome, and the following breakthrough progress is achieved: Precision: directly measure the concentration of particulate matter, and the error rate of the dredging instruction is <2%; High efficiency: the dredging energy consumption is reduced by 46.7% and the efficiency is increased by 50%; Unmanned operation: the manual intervention is reduced by 70%, and remote operation and maintenance are supported; Green: the pass rate of the backwater quality is >98%, and the environmental protection risk approaches zero; It provides a standardized solution for the intelligent upgrade of thickeners in the fields of mines, metallurgy, environmental protection, etc., and has significant economic and social benefits; it can be widely applied to the fields of tailings treatment, the backwater system of concentrators, industrial sewage treatment, etc., especially suitable for the tailings filling scenario, and solves the problems of low efficiency, high energy consumption, and lagging response of traditional dredging methods.

[0027] In some embodiments, the water flow nozzles and the air flow nozzles are arranged alternately in the same plane to form an arrangement angle in the range of 70° to 110°; the water flow sprayed by the water flow nozzles and the air flow sprayed by the air flow nozzles are alternately formed into a gas-liquid two-phase turbulence.

[0028] In this embodiment, the water flow nozzles and the air flow nozzles are arranged alternately in the same plane (such as a horizontal plane or an inclined plane with an inclination angle relative to the ground) to form an arrangement angle in the range of 70° to 110°, so that the water flow sprayed into the bottom of the sedimentation tank 1 by the water flow nozzles and the air flow sprayed into the bottom of the sedimentation tank 1 by the air flow nozzles have a tendency to converge, or converge at a specified position above the bottom of the sedimentation tank 1, such as converging at a position 8 - 15 cm above the bottom of the sedimentation tank 1, and preferably converging at a position 8 cm above the bottom of the sedimentation tank 1.

[0029] In some embodiments, when the thickness of the silt deposited at the bottom of the sedimentation tank 1 exceeds a specified thickness, such as 10 cm, the water flow sprayed into the bottom of the sedimentation tank 1 by the water flow nozzle and the air flow sprayed into the bottom of the sedimentation tank 1 by the air flow nozzle first penetrate the surface layer of the silt and make pulp of the upper layer of the silt (that is, make the particulate matter in the upper layer of the silt mix with water to form a mixed slurry of water body and solid particles). Then, the water flow sprayed into the bottom of the sedimentation tank 1 by the water flow nozzle and the air flow sprayed into the bottom of the sedimentation tank 1 by the air flow nozzle meet at a specified position, such as 8 cm, above the bottom of the sedimentation tank 1. The air flow makes a contact impact on the water flow, converting the water flow and the air flow into a gas-liquid particle cloud carrying impact kinetic energy. The gas-liquid particle cloud diffuses around the intersection, increasing the pulp-making efficiency of the silt at the bottom of the sedimentation tank 1 and also facilitating the excitation of the pulp-making of the silt in the dead corners at the bottom of the sedimentation tank 1, thereby improving the efficiency and thoroughness of dredging.

[0030] See Figure 3 , the water flow nozzle of the first water pipe 35 and the air flow nozzle of the first air pipe 37 are arranged staggeredly. The two nozzles are arranged staggeredly in the same plane, and the preferably formed angle is 90°, and the first water pipe 35 and the first air pipe 37 each form an angle of 45° with the symmetry line of the two; the first water pipe 35 sprays water flow (5 - 15 m / h) and the first air pipe 37 sprays compressed air flow (0.5 - 0.8 MPa) to form an efficient gas-liquid two-phase turbulent flow effect, enhancing the particle suspension ability, enabling the silt accumulated at the bottom of the sedimentation tank 1 to be fully mixed with water to form a uniform slurry; the sprayed water flow of the first water pipe 35 and the sprayed air flow of the first air pipe 37 form a gas-liquid mixed flow to generate a swirl at the bottom of the sedimentation tank 1, expanding the dredging range and reducing the "dredging dead corners"; the combined action of high-pressure water flow and compressed air makes the silt become loose, forming a slurry with good fluidity; compared with the traditional treatment system that only uses a water pump, relying on a single hydraulic pulp-making, using a large-flow water pump consumes a large amount of electricity and it is difficult for a single hydraulic impact to effectively suspend high-density particles (such as magnetite), the gas-liquid collaborative pulp-making reduces energy consumption, improves the dredging efficiency, and also provides good conditions for subsequent treatment.

[0031] In some embodiments, the inlet end of the dredging pump 33 is connected to the bottom of the sedimentation tank 1 through a pipeline 38 in front of the pump; the pipeline 38 in front of the pump is connected to the first water pipe 35 and the first air pipe 37.

[0032] In this embodiment, the inlet end of the dredging pump 33 is connected to the bottom of the sedimentation tank 1 through a pipeline 38 in front of the pump. To avoid the inlet end of the dredging pump 33 being blocked by silt when there is too much silt at the bottom of the sedimentation tank 1, the pipeline 38 in front of the pump is at least connected to the first water pipe 35 and the first air pipe 37, and the silt in the pipeline 38 in front of the pump is made into pulp before dredging to ensure the smooth progress of the dredging work.

[0033] In some embodiments, a first solenoid valve 11 is provided on the first main air pipe 32. The first solenoid valve 11 is connected to the first main air pipe 32 to control the on-off of the air flow in the first main air pipe 32.

[0034] In this embodiment, the first solenoid valve 11 is responsible for regulating and controlling the on-off of the air flow in the first main air pipe 32, controlling the gas source pump 36 to deliver gas into the first main air pipe 32. The gas is released to the bottom of the sedimentation tank 1 via the first branch air pipe 37. The first solenoid valve 11 simultaneously controls the high-pressure gas ejected into the sedimentation tank 1 by each branch air pipe connected to the first main air pipe 32 and the high-pressure water flow ejected into the sedimentation tank 1 by each branch water pipe to act together, optimizing the sludge suspension effect; through the precise regulation of the solenoid valve, the stability of the system under different working conditions is ensured.

[0035] In some embodiments, a turbidimeter cleaning assembly 12 is further included. The turbidimeter cleaning assembly 12 includes a second main air pipe 121, a second solenoid valve 122, and a plurality of jet nozzles; the second main air pipe 121 is communicated with the gas source pump 36; the second solenoid valve 122 is provided on the second main air pipe 121 and is connected to the second main air pipe 121 to control the on-off of the air flow in the second main air pipe 121; the jet nozzles are annularly arranged around the turbidimeter 4, and the jet nozzles are communicated with the second main air pipe 121.

[0036] In this embodiment, when the water body in the sedimentation tank 1 submerges the probe of the immersion turbidimeter 4, the probe of the turbidimeter 4 is easily wrapped by the slurry (such as the attachment of clay and mineral powder), and it needs to be disassembled and cleaned weekly, which requires frequent maintenance, time-consuming maintenance and affects the production continuity. Therefore, the present invention provides the turbidimeter cleaning assembly 12; the turbidimeter cleaning assembly 12 includes a second main air pipe 121, a second solenoid valve 122, and a plurality of high-pressure jet nozzles; the second main air pipe 121 is hermetically connected to the gas source pump 36, and the second solenoid valve 122 controls the on-off of the air flow in the second main air pipe 121; when the turbidimeter 4 needs to be cleaned, the second solenoid valve 122 controls the compressed air in the second main air pipe 121 to access the gas source pump 36, and a plurality of jet nozzles annularly arranged around the turbidimeter 4 will blow compressed air against the turbidimeter 4 to clean the turbidimeter 4, effectively removing the attachments that may adhere to the surface of the sensor, ensuring the accuracy of the measurement. This automated cleaning mechanism greatly reduces the maintenance workload, extends the sensor maintenance cycle from 1 per week to more than 6 months, reduces the annual maintenance man-hours by 90% (from 40 hours to <2 hours), and improves the reliability of the system at the same time.

[0037] In some embodiments, a water pool overflow water outlet is provided at the upper part of the clean water pool 2; a water outlet is provided at the bottom of the clean water pool 2, and a first electric ball valve 13 is provided outside the water outlet. The water outlet is controlled by the first electric ball valve 13 to switch on and off, and the water is used as production water and / or as pulp-making water; A second electric ball valve 14 and a third electric ball valve 15 are provided behind the first electric ball valve 13. The second electric ball valve 14 is used to control the water at the water outlet for production. The third electric ball valve 15 is hermetically connected to the first main water pipe 31 and is used to control the water at the water outlet for making slurry and dredging the bottom sludge of the sedimentation tank.

[0038] In this embodiment, when the water volume in the clear water tank 2 is excessive, the excess water can be discharged from the overflow water outlet 16 of the clear water tank to maintain the water level within a reasonable range, promote water quality circulation, and avoid the erosion of the tank wall, waste of water resources, or environmental pollution caused by the overflow of excessive water volume in the clear water tank 2. The lower part of the clear water tank 2 is equipped with a water outlet dedicated to discharging the processed clear water. A first electric ball valve 13 is provided outside the water outlet. The opening and closing of this water outlet are controlled by the first electric ball valve 13, and the water flow can be flexibly opened or closed as needed to ensure timely drainage when necessary and effectively prevent the leakage of water flow. The first water pump 34 is arranged behind (on the left side of) the first electric ball valve 13. After the first electric ball valve 13 is opened, the first water pump 34 can pump out the water discharged from the water outlet of the clear water tank 2 as production water or slurry-making water. Currently, the deposition and turbidity of the water in the overflow water tank result in the ineffective use of the overflow water, and even damage to the water supply and drainage equipment due to the excessive solid content in the overflow water. The recycling of water resources in the present invention can not only effectively save water resources, but also reduce production costs and simultaneously reduce environmental pollution.

[0039] Behind the first electric ball valve 13, a second electric ball valve 14 and a third electric ball valve 15 are provided. The second electric ball valve 14 is used to adjust the water at the water outlet to flow out from the production water pipe 17 and control the water in the clear water tank 2 for production purposes. The third electric ball valve 15 is hermetically connected to the first main water pipe 31 and specifically manages the water volume flowing to the sedimentation tank 1 for making slurry. When the water volume in the clear water tank 2 is small, the first electric ball valve 13 is closed to gradually store a certain amount of water in the clear water tank 2. When there is enough water in the clear water tank 2 for production or making slurry, the first electric ball valve 13 is opened. When slurry-making is not required in the sedimentation tank 1, the first electric ball valve 13 is opened and the second electric ball valve 14 is opened to make the water in the clear water tank 2 used for production.

[0040] When pulp needs to be made in the sedimentation tank 1, the first electric ball valve 13 is opened, the second electric ball valve 14 is closed, and the third electric ball valve 15 is opened to control the connection between the clear water tank 2 and the first main water pipe 31, and the clear water in the clear water tank 2 is used for making pulp; this realizes the effective recycling of water resources, not only improving the overall treatment efficiency; each valve can automatically adjust the opening degree according to the preset program or real-time monitoring data to ensure reasonable water volume distribution. At the same time, the design of sealed connection ensures the safety and high efficiency of the conveying process, avoiding leakage and other potential problems; through scientific water flow management, intelligent valve control and recycling of water resources, the dependence on external water sources is reduced. While the entire dredging treatment system achieves high efficiency, it also reduces the usage of fresh water, effectively reducing the operating cost and environmental impact, and having significant social and economic value.

[0041] In some embodiments, the treatment system further includes: a PLC controller, electrically connected to the turbidimeter 4, for controlling the start / stop of the dredging operation of the dredging device and the unmanned operation of parameter adjustment according to the detection result of the turbidimeter; a remote monitoring module, electrically connected to the PLC controller, for viewing cloud data and remote control; the remote monitoring module has two optional networking modes: 4G or Wi-Fi.

[0042] In this embodiment, the treatment system further includes: a PLC controller and a remote monitoring module; the PLC controller is electrically connected to the turbidimeter 4; the PLC controller is electrically connected to the first electric ball valve 13, the first water pump 34, the second electric ball valve 14, the third electric ball valve 15, the first solenoid valve 11, the second solenoid valve 122 and the electric gate valve 10; the PLC controller, as the core brain of the system, is responsible for coordinating the actions of each functional module, controlling the start / stop of the dredging operation of the dredging device according to the monitoring result of the turbidimeter 4, and parameters such as the power of the first water pump 34, the air pressure of the air source pump 36, the switch of the first solenoid valve 11 and the switch of the second solenoid valve 122, realizing the full-automatic operation of the dredging process; it can not only complete the basic start and stop operations of dredging, but also adjust the switches of each valve, water pump and solenoid valve according to the real-time monitored data to ensure the best treatment effect, and there is no need for on-site manual operation to adjust parameters; the frequency of manual intervention is reduced by 70%, realizing "few people on duty" or even "unmanned on duty" operation; this design significantly improves the management efficiency, reduces the labor cost and potential safety hazards during the work process, especially in remote or dangerous working environments, and remote control is particularly important; The remote monitoring module is electrically connected to the PLC controller, providing a flexible networking control method. It supports two optional networking modes, 4G or Wi-Fi, and is connected to the cloud platform through the 4G or Wi-Fi network. Managers can view the operating status and historical data of the system at any time and issue necessary remote control instructions, reducing the need for on-site inspections and providing users with diverse network connection options in different scenarios. When in an application environment that requires mobility and wide-area coverage, the 4G network can be selected to achieve remote monitoring. In cases where high-speed data transmission is required and the environment is fixed, the Wi-Fi network can provide faster and more stable data transmission effects.

[0043] Embodiment 2: The present invention provides a method for treating overflow water of a thickener, which is used for the treatment system described in Embodiment 1 and includes the steps: Using the turbidimeter to real-time monitor the concentration of particulate matter in the water body of the sedimentation tank to obtain the turbidity of the water body in the sedimentation tank; controlling the dredging device to perform dredging actions according to the turbidity of the water body in the sedimentation tank.

[0044] In this step, using a turbidimeter to real-time monitor the concentration of particulate matter in the water body of the sedimentation tank to obtain the turbidity of the water body in the sedimentation tank can accurately reflect the content of suspended particles in the water body of the sedimentation tank, providing reliable data support for subsequent dredging decisions. Controlling the dredging device to perform dredging actions according to the turbidity of the water body in the sedimentation tank can increase the accuracy rate of dredging trigger from 60%-70% of the traditional method to over 98%. It can timely detect abnormal situations in the sedimentation tank and perform intelligent feedback control, realizing the precision and automation of dredging operations, effectively avoiding excessive accumulation of silt, significantly reducing the frequency of manual intervention, and can cope with sudden siltation (such as sudden change in ore composition, fluctuation in feed flow rate), preventing equipment operation from being blocked or causing an overflow accident in the overflow water tank, resulting in environmental pollution of heavy metal-containing tailings water. By dredging, the excessive particles carried in the clarified water can be reduced, avoiding pipeline blockage, damage to pump valves or reduction of flotation reagent effects, and even damage to downstream equipment. By monitoring with sensors, the siltation in the sedimentation tank can be timely processed, reducing the dependence on on-site operations such as starting and stopping dredging and parameter adjustment by manual operation, reducing labor costs and potential safety hazards to workers, and is applicable to the situation where there are few maintenance personnel in remote areas of mines.

[0045] In some embodiments, controlling the dredging device to perform a dredging operation according to the turbidity of the water body in the sedimentation tank includes: presetting a turbidity threshold and a continuous exceeding time threshold. When the turbidity of the water body in the sedimentation tank 1 exceeds the preset turbidity threshold and the duration exceeds the preset continuous exceeding time threshold, start the first water pump 34 and the air source pump 36 to start making slurry to form slurry from the sediment at the bottom of the sedimentation tank 1, and start the dredging pump 33 to pump the slurry to the thickener 5; and / or determine the turbidity change rate of the water body in the sedimentation tank 1 according to the turbidity of the water body in the sedimentation tank 1, and adjust the flow rate of the first water pump 34, the air pressure of the air source pump 36, and the power of the dredging pump 33 according to the turbidity change rate; and / or determine the turbidity meter data classification of the water body in the sedimentation tank 1 according to the turbidity of the water body in the sedimentation tank 1, and adjust the power of the first water pump 34, the air pressure of the air source pump 36, and the power of the dredging pump 33 according to the turbidity meter data classification of the water body in the sedimentation tank 1.

[0046] In this embodiment, parameters of a preset turbidity threshold X and a continuous exceeding time threshold T are set. According to the monitoring data of the turbidity meter 4, when the turbidity of the water body in the sedimentation tank 1 exceeds the preset turbidity threshold X and the duration of this exceeding state continues to exceed the preset continuous exceeding time threshold T, the overflow water treatment system will automatically trigger the slurry-making dredging device to perform dredging. The second electric ball valve 14 is closed and the third electric ball valve 15 is opened, so that the first water pump 34 supplies slurry-making water to the first main water pipe 31; the first solenoid valve 11 is opened, so that the air source pump 36 supplies slurry-making gas to the first main air pipe 32. Through the combined action of the water flow sprayed by the water flow nozzle on the first branch water pipe and the air flow ejected by the air flow nozzle on the first branch air pipe, the sediment at the bottom of the sedimentation tank 1 forms slurry; at the same time, the electric gate valve 10 is opened and the dredging pump 33 is started, and the slurry is transported to the thickener 5 through the dredging pipe 39; otherwise, the second electric ball valve 14 is opened and the third electric ball valve 15 is closed, and the first water pump 34 supplies production water to the production water pipe 17; after the slurry-making dredging device makes slurry from the sludge in the sedimentation tank 1 to form slurry, the slurry is transported to the feeding cylinder 18 of the thickener 5 through the dredging pipe 39 by the dredging pump 33 for re-sedimentation treatment. Tailings sludge has high safety and environmental protection risks and generally needs to be transported to a tailings pond or a tailings treatment plant for treatment and then discharged, with complex maintenance procedures and affecting production continuity; this step realizes the resource reuse of the slurry, improves the utilization rate of tailings or mineral solids, and reduces the workload of sewage transfer.

[0047] Avoid the instantaneous turbidity of the water body in the sedimentation tank 1 exceeding the turbidity threshold for dredging trigger without considering the actual siltation state and directly starting dredging, resulting in misjudgment, energy waste (such as the pump idling) and equipment wear (such as increased pipeline erosion); and carry out dredging only when the duration exceeds the preset continuous exceeding standard time threshold, realize dredging on demand, and avoid unnecessary energy waste and equipment wear; avoid insufficient or excessive dredging. Traditional dredging requires frequent shutdowns for cleaning or pipeline dredging, with a high manual maintenance intensity. However, based on the turbidity meter 4, the concentration of particulate matter in the water body of the sedimentation tank 1 is monitored in real time, and the judgment and start-up process based on conditions are fully automated without manual intervention, thus improving the operation efficiency and reliability of the system; it can also respond in a timely manner to sudden siltation and avoid excessive siltation in a short time, which may lead to pipeline blockage or reduced backwater quality.

[0048] According to the turbidity of the water body in the sedimentation tank 1, determine the turbidity change rate of the water body in the sedimentation tank 1. Through the fuzzy PID algorithm, dynamically adjust the dredging intensity according to the turbidity change rate, and adjust the flow rate of the first water pump 34, the air pressure of the air source pump 36, and the power of the dredging pump 33 (for example, when the turbidity increases by 100 ppm, the flow rate of the first water pump 34 increases by 10%). The dynamic adjustment mechanism can effectively cope with different working conditions changes and ensure the stability and flexibility of the dredging work; if the turbidity change rate is low, it indicates that the concentration of particulate matter in the water body in the sedimentation tank 1 has not increased significantly. At this time, the flow rate of the first water pump 34 and the air pressure of the air source pump 36 can be appropriately reduced to save resources and energy; on the contrary, if the turbidity change rate is high, it indicates that the concentration of particulate matter is rising rapidly. At this time, it is necessary to increase the flow rate of the first water pump 34 and the air pressure of the air source pump 36 to improve the dredging efficiency; avoid insufficient or excessive dredging.

[0049] According to the turbidity of the water body in the sedimentation tank 1, determine the grading of the turbidity meter data of the water body in the sedimentation tank 1. Adjust the power of the first water pump 34, the air pressure of the air source pump 36, and the power of the dredging pump 33 according to the grading of the turbidity meter data of the water body in the sedimentation tank 1, and adjust the energy input according to the turbidity value data grading (such as using 50% pump power + 0.3 MPa air pressure when the turbidity is 400 - 600 ppm, and increasing to 80% power + 0.5 MPa air pressure when the turbidity > 600 ppm). The grading adjustment mechanism makes the system response more delicate and efficient. When the turbidity value data reaches a certain level, automatically adjust the power of the first water pump 34 and the air pressure of the air source pump 36 to adjust the dredging capacity and ensure that the slurry can be fully stirred and transported; the dredging energy consumption is reduced by 46.7% (the annual power consumption is reduced from 18,000 kWh to 9,600 kWh), the dredging efficiency is increased by 50%, and the single dredging duration is shortened from the traditional 1 - 2 hours to 20 - 40 minutes.

[0050] Triggering the dredging device to perform dredging operations by presetting the turbidity threshold and the continuous exceeding standard time threshold is independent of adjusting the dredging operation parameters of the dredging device according to the turbidity change rate of the water body in the sedimentation tank 1 and adjusting the dredging operation parameters of the dredging device in grades according to the turbidity meter data of the water body in the sedimentation tank 1. When the turbidity of the water body in the sedimentation tank 1 reaches the corresponding conditions, the corresponding dredging operation is automatically triggered to realize automatic dredging treatment, improving the treatment efficiency and accuracy of the overflow water of the thickener.

[0051] In some embodiments, sludging is performed on the sludge in the pipeline 38 before the pump or simultaneously with the dredging. In this step, sludging is performed on the sludge in the pipeline 38 before the pump or simultaneously with the dredging to make it in a slurry state, which is easier to flow, thereby reducing the possibility of blockage of the pipeline 38 before the pump, ensuring the smooth progress of the dredging work, and improving the efficiency of the dredging work.

[0052] In some embodiments, the preset turbidity threshold is 400 ppm; the preset continuous exceeding standard time threshold is 5 minutes. In this embodiment, the preset turbidity threshold is 400 ppm; the preset continuous exceeding standard time threshold is 5 minutes. That is, when the turbidity meter 4 monitors that the turbidity of the water body in the sedimentation tank 1 exceeds 400 ppm, it is in an exceeding standard state, and when the exceeding standard state lasts for more than 5 minutes, the overflow water treatment system automatically triggers the sludging and dredging device to perform sludging and dredging. After triggering the dredging, ensure that the turbidity of the water body in the sedimentation tank 1 drops below 400 ppm (lower than the industry safety threshold of 500 ppm), increasing the qualified rate of the return water turbidity from 75%-85% to 98%-99%, and reducing the incidence of environmental protection accidents by 90%; shortening the response time to sudden siltation from 2-8 hours (manual inspection) to 5 minutes, and the system can automatically identify and handle abnormal working conditions; ensuring that the slurry in the pipeline will not be in a too high concentration state for a long time, reasonably setting and strictly monitoring these two parameters to ensure the efficient and safe operation of the overflow water treatment system, and ensuring that the dredging effect and the clarified water quality meet the requirements of the industry safety threshold.

[0053] In some embodiments, it further includes the steps of: presetting the cleaning time interval and the cleaning time length; automatically opening the turbidity meter cleaning air nozzle to blow gas towards the turbidity meter every specified cleaning time interval to remove the surface attachments of the turbidity meter 4; closing the turbidity meter cleaning air nozzle when the blowing time reaches the specified cleaning time length, and repeating this process.

[0054] In this step, first, a cleaning time interval of 10 minutes and a cleaning time length of 3 minutes for each unit are preset; then, according to the set cleaning time interval, the turbidimeter cleaning air nozzle of the turbidimeter cleaning component 12 is automatically activated to blow gas towards the turbidimeter sensor to remove dirt or impurities adhering to the surface of the turbidimeter 4; after the blowing lasts for the preset cleaning time length, the turbidimeter cleaning air nozzle is automatically closed to end the cleaning process of this unit; then it enters the waiting state for the next cleaning time interval and repeats the above process; through automated operation, it is ensured that the surface of the turbidimeter 4 sensor always remains clean, thus guaranteeing the accuracy and reliability of the measurement data; the regular cleaning work can be completed without manual intervention, greatly improving the work efficiency and the intelligent level of the system. In addition, during actual operation, the cleaning time interval and the blowing time length for each unit can be flexibly adjusted according to the requirements of specific application scenarios to optimize the cleaning effect and extend the service life of the sensor; by implementing such a self-cleaning method, not only can the measurement error caused by dirt accumulation on the sensor be effectively prevented, but also the downtime caused by equipment maintenance can be reduced, which is particularly important for monitoring systems that need to operate continuously for a long time. It can be widely applied in fields such as environmental monitoring and industrial production process control.

[0055] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0056] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A thickener overflow water treatment system, characterized in that: include: Sedimentation tanks, clear water tanks, silt removal equipment and turbidity meters; The sedimentation tank is arranged at the side of the thickener and is connected with the clarified water receiving part of the thickener through an overflow pipe; The clean water tank is arranged at the side of the sedimentation tank, and a flow wall is arranged between the clean water tank and the sedimentation tank; the height of the flow wall is lower than the height of the side walls of the clean water tank and the sedimentation tank; The desilting device comprises: a first main water pipe, a first main air pipe and a desilting pump; the first main water pipe is connected to the first water pump, and the first main water pipe is connected to a first branch water pipe, and the first branch water pipe is provided with a water flow nozzle; the first main air pipe is connected to the air source pump, and the first main air pipe is connected to a first branch pipe, and the first branch pipe is provided with an air flow nozzle; the water flow nozzle on the first branch water pipe and the air flow nozzle on the first branch pipe are respectively arranged at the bottom of the sedimentation tank, so as to spray water to the bottom of the sedimentation tank through the water flow nozzle and spray air flow to the bottom of the sedimentation tank through the air flow nozzle; the inlet end of the desilting pump is connected to the bottom of the sedimentation tank, and the outlet end of the desilting pump is connected to the feed barrel of the thickener; The turbidity meter is arranged in the sedimentation tank and is used to monitor the concentration of particulate matter in the thickener overflow water in the sedimentation tank.

2. The processing system according to claim 1, characterized in that The water flow nozzle and the air flow nozzle are staggeredly arranged in the same plane to form an arrangement angle ranging from 70° to 110°; the water flow nozzle sprays water flow and the air flow nozzle sprays air flow to stagger to form gas-liquid two-phase turbulence.

3. The processing system according to claim 1, characterized in that The inlet end of the desilting pump is connected to the bottom of the sedimentation tank through a pre-pump pipeline; the pre-pump pipeline is connected to the first branch water pipe and the first branch air pipe.

4. The processing system according to claim 1, characterized in that The first main air pipe is provided with a first solenoid valve, which is connected to the first main air pipe to control the air flow of the first main air pipe.

5. The processing system according to claim 1, characterized in that It also includes a turbidity meter cleaning component, which includes a second main air pipe, a second solenoid valve and a plurality of air nozzles; the second main air pipe is connected to the air source pump; the second solenoid valve is arranged on the second main air pipe, connected to the second main air pipe, and controls the air flow of the second main air pipe; the air nozzles are arranged in a ring around the turbidity meter, and the air nozzles are connected to the second main air pipe.

6. The processing system according to claim 1, characterized in that The upper part of the clean water tank is provided with a water tank overflow outlet; the bottom of the clean water tank is provided with a water outlet, the outer side of the water outlet is provided with a first electric ball valve, and the water outlet is controlled by the first electric ball valve. A second electric ball valve and a third electric ball valve are arranged behind the first electric ball valve. The second electric ball valve is used to control the water at the water outlet for production. The third electric ball valve is connected to the first main water pipe and is used to control the water at the water outlet for slurrying and desilting of the bottom sludge of the sedimentation tank.

7. The processing system according to claim 1, characterized in that Also includes: A PLC controller, electrically connected to the turbidity meter, for controlling the start and stop of the silting action of the silting device according to the detection result of the turbidity meter; The remote monitoring module is electrically connected to the PLC controller and is used for cloud data viewing and remote control; the remote monitoring module has two optional networking modes: 4G or Wi-Fi.

8. A method for treating thickener overflow water, characterized in that: For use in a processing system according to any one of claims 1 to 7, the method comprises the steps of: Using the turbidity meter to monitor the concentration of particulate matter in the water body of the sedimentation tank in real time to obtain the turbidity of the water body of the sedimentation tank; According to the turbidity of the water in the sedimentation tank, the dredging device is controlled to perform a dredging action.

9. The processing method according to claim 8, characterized in that The step of controlling the dredging device to perform dredging according to the turbidity of the water in the sedimentation tank comprises: When the turbidity of the water in the sedimentation tank exceeds a preset turbidity threshold and the duration exceeds a preset continuous exceeding time threshold, the first water pump and the air source pump are started to start slurrying so that the sediment at the bottom of the sedimentation tank forms mud, and the dredging pump is started to pump the mud to the thickener; and / or Determine the turbidity change rate of the water in the sedimentation tank according to the turbidity of the water in the sedimentation tank, and adjust the flow rate of the first water pump, the air pressure of the air source pump and the power of the dredging pump according to the turbidity change rate; and / or According to the turbidity of the water body in the sedimentation tank, the turbidity meter data classification of the water body in the sedimentation tank is determined, and the first water pump power, the air source pump pressure and the dredging pump power are adjusted according to the turbidity meter data classification of the water body in the sedimentation tank.

10. The processing method according to claim 8, characterized in that: The method also includes the following steps: automatically opening the turbidity meter cleaning air nozzle to spray gas toward the turbidity meter at every specified time interval to remove the surface attachments of the turbidity meter; and closing the turbidity meter cleaning air nozzle when the spraying time reaches the specified time length.

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