Intelligent lifting type thickener drainage system and method based on turbidity monitoring

Abstract

The invention discloses an intelligent lifting type thickener drainage system and method based on turbidity monitoring. According to the system, a water collecting mechanism comprises a water collecting cover and a rigid water collecting pipeline; the displacement adjusting mechanism comprises a fixing frame, a lead screw guide rail and a sliding block. The transverse connecting rod is connected with the sliding block and the rigid water collecting pipeline. The monitoring assembly comprises a turbidity detection sensor, a distance measuring sensor and a liquid level sensor; the power mechanism comprises a water pumping hose, a main drainage pipeline and a water pump; the water pump is connected with the rigid water collecting pipeline through a water pumping hose; the inlet end of the overflow drainage pipeline is connected with a water outlet in one end of the overflow groove, and the outlet end is communicated with the middle section of the main drainage pipeline; the method comprises the steps that when the turbidity value is smaller than a set turbidity threshold value and the liquid level height data is not smaller than the overflow liquid level height of the overflow groove, the overflow groove and the overflow water drainage pipeline are used for conducting water drainage operation, and otherwise, the water suction pump and the main water drainage pipeline are used for conducting water drainage operation. The system and the method can realize automatic regulation and control of the displacement and the speed of the overflow water.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent control technology, and in particular relates to an intelligent lifting thickener drainage system and method based on turbidity monitoring. Background Art

[0002] Thickener is a kind of solid-liquid separation equipment commonly used in the field of mineral processing. It can separate solid matter by allowing solid particles to settle in liquid through gravity. During the sedimentation process, the heavier particles of suspended matter will gradually settle to the bottom, while the lighter particles and clean water will flow out of the upper layer and become overflow water. There is usually an overflow trough on the top of the thickener. The overflow water level is at the overflow trough and will flow out of the overflow pipe into the overflow pool. It will usually be returned to the water inlet end of the thickener or other processing units for secondary treatment or recycling.

[0003] In the process of using a thickener to treat mortar, stratification will occur after a period of flocculation and sedimentation of the mortar. From top to bottom, it is divided into an overflow area, a sedimentation area, and a compression area. In order to effectively remove the overflow water in the overflow area, a stepped overflow drain valve is often used to control the liquid level of the overflow water. Although this method can increase the bottom flow concentration and promote the circulation of overflow water to a certain extent, there are usually drainage dead corners during the drainage process, which will affect the bottom flow concentration. At the same time, the valve is easily blocked by tailings during the drainage process. In addition, the drainage speed is often uncontrolled, and the drainage flow is uneven, resulting in less overflow water in the sand bin and slower drainage speed. In order to effectively solve the above problems, it is urgent to provide an intelligent lifting thickener drainage device and method based on turbidity monitoring. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides an intelligent lifting thickener drainage system and method based on turbidity monitoring. The system has a high degree of intelligence, high control accuracy, and good environmental benefits. It can realize automatic adjustment and control of drainage volume and speed. Compared with traditional methods, it can reduce the intervention of manual operation in the entire drainage operation process and reduce the labor input cost. At the same time, it can effectively reduce the waste of water resources in the drainage process and greatly improve production efficiency. The method has a high degree of intelligence, a simple implementation process, good environmental performance, and high drainage efficiency. It can realize the automatic drainage operation of overflow water and obtain high-quality filling bodies. At the same time, it can effectively solve the problem that the step valve is easily blocked by tailings.

[0005] In order to achieve the above-mentioned object, the present invention provides an intelligent lifting thickener drainage system based on turbidity monitoring, comprising a bin body, an overflow trough and an intelligent drainage device; the overflow trough is installed at the top of the bin body; The intelligent drainage device includes a water collection mechanism, a displacement adjustment mechanism, a monitoring component, a power mechanism and a controller; The water collecting mechanism is arranged in the inner cavity of the bin body, and comprises a water collecting cover and a rigid water collecting pipeline; the water collecting cover is arranged horizontally, and has a straight opening at its lower end, and a water permeable hole is opened at the center of its top end; the rigid water collecting pipeline is vertically fixedly connected to the upper part of the water collecting cover, and its lower end is connected to the water permeable hole; The displacement adjustment mechanism includes a fixed frame, a screw guide rail, a slider, a driving mechanism and a transverse connecting rod; the fixed frame is vertically mounted on a side wall of the interior of the bin body, and its upper end extends to the top of the bin body; the screw guide rail is vertically arranged and rotatably mounted in the fixed frame; a threaded hole is arranged inside the slider, and is fitted on the outside of the screw guide rail through threaded fitting, and at the same time, its side surface close to the outside is in sliding contact with the fixed frame; the driving mechanism is mounted on the top of the fixed frame, and its output end is connected to the upper end of the screw guide rail to drive the rotation of the screw guide rail; the transverse connecting rod is horizontally arranged, and its outer end is vertically fixedly connected to the inner side of the slider, and its inner end is vertically fixedly connected to the lower part of the rigid water collection pipe; The monitoring component includes a turbidity detection sensor, a distance sensor and a liquid level sensor. The turbidity detection sensor is installed inside the water collection cover. The distance sensor is installed on one side of the upper end of the rigid water collection pipeline through a transverse bracket, and its detection surface faces downward, and is used to detect the distance signal between the transverse bracket and the liquid surface in real time; the liquid level sensor is installed on the inner side wall of the warehouse body, and is used to detect the liquid level height signal in real time; The power mechanism includes a water suction hose, a main drainage pipeline, a water suction pump, an overflow drainage pipeline, a main drainage regulating valve, an overflow drainage regulating valve and a total drainage regulating valve; the water suction pump is installed at the top of the warehouse body or the outside of the warehouse body, and its inlet end is connected to the upper end of the rigid water collection pipeline through a water suction hose, and its outlet end is connected to the inlet end of the main drainage pipeline; the inlet end of the overflow drainage pipeline is connected to the water outlet at one end of the overflow tank, and its outlet end is connected to the middle section of the main drainage pipeline; the main drainage regulating valve is connected in series to the water inlet section of the main drainage pipeline; the overflow drainage regulating valve is connected in series to the middle section of the overflow drainage pipeline; the total drainage regulating valve is connected in series to the water outlet section of the main drainage pipeline; The input end of the controller is respectively connected to the turbidity detection sensor, the distance sensor and the liquid level sensor, and the output end is respectively connected to the driving mechanism, the water pump, the main drainage regulating valve, the overflow drainage regulating valve and the total drainage regulating valve.

[0006] Furthermore, in order to facilitate the adjustment of the lateral position of the water collecting mechanism in the bin body, the lateral connecting rod is a linear electric telescopic rod, and the output end of the controller is also connected to the linear electric telescopic rod.

[0007] Preferably, the water collecting cover is a box-type structure with an opening at the lower end, and the water permeable hole is arranged in the central area of ​​the top plate of the water collecting cover.

[0008] Furthermore, in order to conveniently collect and store overflow water, an overflow water tank is also included. The overflow water tank is installed on one side outside the warehouse body, and its inlet end is connected to the outlet end of the main drainage pipeline.

[0009] Furthermore, in order to effectively ensure the stability of the rotation of the screw guide rail, the upper and lower ends of the fixed frame are relatively installed with an upper bearing seat and a lower bearing seat, and an upper bearing and a lower bearing are respectively installed in the upper bearing seat and the lower bearing seat; the upper and lower ends of the screw guide rail are rotatably connected to the upper bearing seat and the lower bearing seat through the upper bearing and the lower bearing respectively.

[0010] Furthermore, in order to facilitate the alarm action, an alarm module is also included. The alarm module is installed on the outer wall of the warehouse body and is connected to the output end of the controller for executing the alarm action according to the control of the controller.

[0011] Furthermore, in order to facilitate the detection of the position of the highest stroke and the lowest stroke of the slider, so as to automatically control the driving mechanism to stop the action when the slider reaches the highest stroke or the lowest stroke position, it also includes an upper proximity switch and a lower proximity switch, which are relatively installed on the upper bearing seat and the lower bearing seat, and are respectively in contact with the upper end surface and the lower end surface of the slider. At the same time, the upper proximity switch and the lower proximity switch are both connected to the input end of the controller.

[0012] As a preference, the controller is a PLC controller.

[0013] In the present invention, by setting the water collecting cover, it is convenient to utilize the characteristic that the cross-sectional area of ​​the open end is larger than the cross-sectional area of ​​the water pumping pipeline, effectively reducing the disturbance effect of the fluctuation of the water pump on the water absorption liquid surface, thereby not affecting the bottom flow concentration, and effectively ensuring the quality of the obtained filling body. A section of rigid water collecting pipeline is set at the upper end of the water collecting cover, which can be conveniently connected to the displacement adjustment mechanism through the transverse connecting rod, and connected to the distance sensor through the transverse bracket. In this way, on the one hand, it is convenient to use the displacement adjustment mechanism to change the vertical position of the rigid water collecting pipeline, and on the other hand, the distance sensor can also follow the water collecting cover to move vertically, thereby helping to detect the distance difference between the water collecting cover and the liquid surface in real time. Therefore, the distance difference can be used as feedback data to automatically adjust the height of the water collecting cover in the vertical direction, and finally the adjustment of the drainage port position can be realized intelligently. The water pump is connected to the rigid water collecting pipeline through the water pumping hose, which can ensure that the water collecting cover can always maintain a connected state with the water pump during the vertical movement process, and ensure that the drainage operation can be carried out continuously during the vertical movement process. By using a fixed frame to vertically and rotatably support the screw guide rail on the inner side of the bin body, and then connecting one end of the transverse connecting rod to the slider mounted on the screw guide rail, the slider and the water collecting cover can be driven to change their vertical displacement by rotating the screw guide rail. By installing a turbidity detection sensor inside the water collecting cover, the change of the suspended matter concentration in the water can be synchronously and accurately detected in real time during the pumping process, and then the change of the suspended matter concentration in the extracted overflow water can be sensed in real time, and the turbidity value of the water quality in the thickening bin can be monitored in real time, so that the height of the water collecting cover drain port can be automatically adjusted according to the change of turbidity. In this way, not only can the automatic control of drainage without dead angles be realized, but also the drainage volume and drainage time can be conveniently controlled, ensuring the efficiency and continuity of the drainage process. At the same time, the stability of drainage efficiency and water quality is ensured, and the unstable thickening effect caused by excessive or insufficient drainage is avoided, the quality of the filling body is guaranteed, and it is conducive to the subsequent high-quality filling operation. By arranging a main drainage regulating valve on the main drainage pipeline and an overflow drainage regulating valve on the overflow drainage pipeline, the overflow speed and flow rate of the overflow water can be conveniently adjusted during the drainage process using the overflow trough and the drainage process using the water collecting cover, thereby further reducing the disturbance effect of the fluctuation of the drainage action on the overflow water in the overflow area, thereby ensuring the stability of the drainage process, avoiding the occurrence of unstable thickening effect due to excessive drainage or excessive disturbance, ensuring the quality of the filling body, and effectively solving the problem of the step valve being easily blocked by tailings, reducing the maintenance cost of the equipment and improving the drainage efficiency.

[0014] The present invention significantly improves the intelligence of the thickener by setting up an intelligent drainage device, realizes the automatic drainage of overflow water, and effectively solves the problem that the step valve is easily blocked by tailings, reduces the maintenance cost of the equipment, and improves the drainage efficiency. The system has a high degree of intelligence, high control accuracy, and good environmental benefits. It realizes the automatic adjustment and control of the drainage volume and speed. Compared with traditional methods, it reduces the intervention of manual operation in the entire drainage operation process, reduces the labor input cost, and at the same time reduces the waste of water resources in the drainage process, and greatly improves production efficiency.

[0015] The present invention also provides a method for draining water from an intelligent lifting thickener based on turbidity monitoring, which uses an intelligent lifting thickener drainage system based on turbidity monitoring, and includes the following steps: Step 1: Send the treated tailings slurry into the bin of the thickener, then add flocculant into the bin to start flocculation and sedimentation operation. After the flocculation and sedimentation operation continues for a set time, execute step 2; Step 2: In the initial stage, the drive mechanism is used to drive the screw guide rail to rotate in the opposite direction, and the slider and the horizontal connecting rod are simultaneously driven to move upward until the slider moves to the highest stroke, and the drive mechanism is controlled to stop. At this time, the distance measuring sensor moves to the upper end of the bin body along with the rigid water collection pipe; Step 3: Use the liquid level sensor to collect the liquid level height signal in real time and send it to the controller. At the same time, use the turbidity detection sensor to collect the turbidity signal of the overflow water in real time and send it to the controller. The controller obtains the liquid level height data according to the liquid level signal, and obtains the turbidity value of the overflow water according to the turbidity signal. When the turbidity value is less than the set turbidity threshold and the liquid level height data is not lower than the overflow liquid level height of the overflow tank, execute S31. When the turbidity value is less than the set turbidity threshold and the liquid level height data is lower than the overflow liquid level height of the overflow tank, execute S32. When the turbidity value is greater than or equal to the set turbidity threshold, directly execute step 4. S31: The controller controls the overflow drainage regulating valve to open and controls the main drainage regulating valve to open, and uses the overflow tank and the overflow drainage pipeline to discharge the overflow liquid near the overflow tank into the main drainage pipeline, and then discharges it into the overflow pool through the main drainage pipeline; at the same time, the controller controls the valve opening of the overflow drainage regulating valve according to the continuous change of the turbidity value. When the continuous change of the turbidity value is gentle, the current valve opening of the main overflow drainage regulating valve is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the overflow drainage regulating valve is controlled to decrease until the change of the turbidity value tends to be gentle, and then the valve opening of the current overflow drainage regulating valve is kept unchanged; S32: Use the distance measuring sensor to collect the distance signal between the transverse bracket and the liquid surface in real time, and send it to the controller. The controller obtains the distance value A between the transverse bracket and the liquid surface according to the distance signal between the transverse bracket and the liquid surface, and compares the distance value A between the transverse bracket and the liquid surface with the distance value B between the transverse bracket and the water collecting cover. When the distance value A is greater than the distance value B, the control driving mechanism drives the screw guide to rotate in the positive direction, and simultaneously drives the slider and the transverse connecting rod to move downward until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C, wherein the distance value C is less than the distance value B, and the control driving mechanism stops the action. At the same time, the overflow drainage regulating valve is controlled to be closed, the main drainage regulating valve is controlled to be opened, and the main drainage regulating valve is kept in the open state, the water pump is controlled to start and provide negative pressure, and the overflow water is collected in a large range through the water collecting cover, and then discharged through the rigid water collecting pipe The water pump is connected to the main drainage pipe, the water pump hose and the main drainage pipe to discharge into the overflow pool. During the operation of the water pump, the controller compares the distance value A and the distance value B in real time. When the distance value A is greater than the distance value B, the driving mechanism is controlled to drive the screw guide rail to rotate forward, and the slider and the horizontal connecting rod are synchronously driven to move downward until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C. The driving mechanism is controlled to stop the action to realize the automatic following action in the process of pumping and draining water. At the same time, the controller controls the valve opening of the main drainage regulating valve according to the continuous change of the turbidity value. When the continuous change of the turbidity value is smooth, the current valve opening of the main drainage regulating valve is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the main drainage regulating valve is controlled to decrease until the change of the turbidity value tends to be smooth, and then the valve opening of the current main drainage regulating valve is kept unchanged. Step 4: Control the water pump to stop working. At the same time, time the turbidity duration when the turbidity value is greater than or equal to the set turbidity threshold. When the turbidity duration is less than the set duration, re-execute step 3. When the turbidity duration is greater than or equal to the set duration, control the alarm module to perform an alarm action.

[0016] Furthermore, in order to facilitate the automatic shutdown control of the driving mechanism when the slider reaches the highest stroke and the lowest stroke position, in step one, the upper proximity switch is used to detect whether the slider has reached the highest stroke. When the slider reaches the highest stroke, the upper proximity switch is triggered and sends an upper stroke in place signal to the controller. After receiving the upper stroke in place signal, the controller controls the driving mechanism to stop moving; in step two, the lower proximity switch is used to detect whether the slider has reached the lowest stroke. When the slider reaches the lowest stroke, the lower proximity switch is triggered and sends a lower stroke in place signal to the controller. After receiving the lower stroke in place signal, the controller controls the driving mechanism to stop moving, controls the water pump to stop moving, and at the same time, controls the alarm module to perform a warning action.

[0017] In the present invention, in the initial stage, the distance measuring sensor is moved to the top of the bin along with the rigid water collecting pipe, so as to avoid the situation that the distance measuring sensor is submerged when the initial overflow water level is high. The turbidity detection sensor is first used to detect the turbidity value of the overflow water, and the turbidity value is compared with the set turbidity threshold value, so as to effectively judge whether the drainage condition of the overflow water is met. When the overflow water drainage condition is met, the liquid level height data sensed by the liquid level sensor is used as the action judgment basis. When the liquid level height data is higher than or equal to the overflow liquid level height of the overflow tank, the overflow tank and the overflow drainage pipe are directly used for drainage operation. When the liquid level height data is lower than the overflow liquid level height of the overflow tank, the water pump is used for drainage operation, which can effectively save the consumption of electric energy. When the overflow drainage pipe is used for drainage operation, the valve opening of the overflow drainage regulating valve is adjusted according to the continuous change of the turbidity value, which can effectively ensure that the fluctuation of the drainage action will not cause disturbance to the overflow water in the overflow area, which is conducive to ensuring that the concentration of the bottom flow will not be affected. In the process of drainage operation using a water pump, the distance value A between the horizontal support and the liquid surface is obtained through the distance sensor, and then the distance value A is compared with the distance value B between the horizontal support and the water collecting cover, and the water collecting cover is controlled to perform a follow-up action during the drainage process according to the comparison result, so that the position of the drainage port can be adjusted intelligently. In this way, automatic control of drainage without dead angles can be achieved, and the drainage volume and drainage time can be conveniently controlled, ensuring the efficiency and continuity of the drainage process. At the same time, the stability of drainage efficiency and water quality is ensured, and the unstable thickening effect caused by excessive or insufficient drainage is avoided. In the process of drainage operation using a water pump, the valve opening of the main drainage regulating valve is adjusted according to the continuous change of the turbidity value, which can effectively ensure that the fluctuation of the drainage action will not cause disturbance to the overflow water in the overflow area, ensure the quality of the obtained filling body, and facilitate the subsequent high-quality filling operation. In addition, it also effectively solves the problem that the step valve is easily blocked by tailings, reduces the maintenance cost of the equipment, and improves the drainage efficiency. When the turbidity value does not meet the drainage conditions of overflow water, the pump is promptly controlled to stop working until the turbidity value is less than the set turbidity threshold, and then the pump is restarted to drain the water, which can effectively ensure the appropriateness of drainage and prevent the occurrence of unstable thickening effects due to excessive or insufficient drainage, effectively ensuring the quality of the filling body. When the turbidity value is still greater than or equal to the turbidity threshold within the set technical time, the alarm module is controlled to alarm, which can effectively remind relevant personnel in a timely manner when the production process has ended.

[0018] This method has a high degree of intelligence, a simple implementation process, good environmental performance, and high drainage efficiency. It can realize the automatic drainage operation of overflow water and obtain high-quality filling bodies. At the same time, it effectively solves the problem that the step valve is easily blocked by tailings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a principle block diagram of the circuit part in the present invention.

[0020] In the figure: 1. water collecting cover; 2. water suction hose; 3. water pump; 4. turbidity detection sensor; 5. screw guide rail; 6. horizontal connecting rod; 7. slider; 8. fixing frame; 9. overflow groove; 10. main drainage regulating valve; 11. main drainage pipeline; 12. overflow pool; 13. compression area; 14. warehouse; 15. rigid water collecting pipeline; 16. water collecting mechanism; 17. displacement regulating mechanism; 18. driving mechanism; 19. distance measuring sensor; 20. overflow drainage pipeline; 21. liquid level sensor; 22. overflow drainage regulating valve; 23. main drainage regulating valve; 24. sedimentation area; 25. overflow area; 26. horizontal bracket; 27. upper bearing seat; 28. lower bearing seat; 29. ​​alarm module. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, the present invention provides an intelligent lifting thickener drainage system based on turbidity monitoring, including a bin body 14, an overflow trough 9 and an intelligent drainage device; the overflow trough 9 is installed at the top of the bin body 14; The intelligent drainage device includes a water collection mechanism 16, a displacement adjustment mechanism 17, a monitoring component, a power mechanism and a controller; The water collecting mechanism 16 is arranged in the inner cavity of the bin body 14, and includes a water collecting cover 1 and a rigid water collecting pipeline 15; the water collecting cover 1 is arranged horizontally, and has a straight opening at its lower end, and a water permeable hole is opened at the center of its top; the rigid water collecting pipeline 15 is vertically fixedly connected to the upper part of the water collecting cover 1, and its lower end is connected to the water permeable hole; The displacement adjustment mechanism 17 includes a fixed frame 8, a screw guide rail 5, a slider 7, a driving mechanism 18 and a transverse connecting rod 6; the fixed frame 8 is vertically mounted on a side wall of the interior of the bin body 14, and its upper end extends to the top of the bin body 14; the screw guide rail 5 is vertically arranged and rotatably installed in the fixed frame 8; the interior of the slider 7 is provided with a threaded hole, and is fitted on the outside of the screw guide rail 5 through a threaded fit, and at the same time, its side surface on the outside is in sliding contact with the fixed frame 8; the driving mechanism 18 is installed at the top of the fixed frame 8, and its output end is connected to the upper end of the screw guide rail 5, for driving the rotation of the screw guide rail 5, as a preferred embodiment, the driving mechanism 18 is a stepping motor; the transverse connecting rod 6 is horizontally arranged, and its outer end is vertically fixedly connected to the inner side of the slider 7, and its inner end is vertically fixedly connected to the lower part of the rigid water collection pipeline 15; The monitoring assembly includes a turbidity detection sensor 4, a distance sensor 19 and a liquid level sensor 21. The turbidity detection sensor 4 is installed inside the water collection cover 1. The distance sensor 19 is installed on one side of the upper end of the rigid water collection pipeline 15 through a transverse bracket 26, and its detection surface faces downward, and is used to detect the distance signal between the transverse bracket 26 and the liquid surface in real time; the liquid level sensor 21 is installed on the inner wall of the warehouse body 14, and is used to detect the liquid level height signal in real time; The power mechanism includes a water suction hose 2, a main drainage pipeline 11, a water suction pump 3, an overflow drainage pipeline 20, a main drainage regulating valve 10, an overflow drainage regulating valve 22 and a total drainage regulating valve 23; the water suction pump 3 is installed at the top of the warehouse body 14 or the outside of the warehouse body 14, and its inlet end is connected to the upper end of the rigid water collecting pipeline 15 through the water suction hose 2, and its outlet end is connected to the inlet end of the main drainage pipeline 11; the inlet end of the overflow drainage pipeline 20 is connected to the water outlet at one end of the overflow tank 9, and its outlet end is connected to the middle section of the main drainage pipeline 11; the main drainage regulating valve 10 is connected in series to the water inlet section of the main drainage pipeline 11; the overflow drainage regulating valve 22 is connected in series to the middle section of the overflow drainage pipeline 20; the total drainage regulating valve 23 is connected in series to the water outlet section of the main drainage pipeline 11; The input end of the controller is respectively connected to the turbidity detection sensor 4, the distance sensor 19 and the liquid level sensor 21, and the output end is respectively connected to the driving mechanism 18, the water pump 3, the main drainage regulating valve 10, the overflow drainage regulating valve 22 and the total drainage regulating valve 23.

[0023] In order to facilitate the adjustment of the lateral position of the water collecting mechanism 16 in the bin body 14, the lateral connecting rod 6 is a linear electric telescopic rod, and the output end of the controller is also connected to the linear electric telescopic rod.

[0024] As a preference, the water collecting cover 1 is a box-type structure with an opening at the lower end, and the water permeable hole is arranged in the central area of ​​the top plate of the water collecting cover 1.

[0025] In order to collect and store overflow water conveniently, an overflow water tank 12 is also included. The overflow water tank 12 is installed on one side outside the bin body 14 , and its inlet end is connected to the outlet end of the main drainage pipeline 11 .

[0026] In order to effectively ensure the stability of the rotation of the screw guide rail, the upper and lower ends of the fixed frame 8 are relatively installed with an upper bearing seat 27 and a lower bearing seat 28, and the upper bearing and the lower bearing are respectively installed in the upper bearing seat 27 and the lower bearing seat 28; the upper and lower ends of the screw guide rail 5 are rotatably connected to the upper bearing seat 27 and the lower bearing seat 28 through the upper bearing and the lower bearing.

[0027] In order to facilitate the alarm action, an alarm module 29 is also included. The alarm module 29 is installed on the outer wall of the warehouse body 14 and is connected to the output end of the controller for executing the alarm action according to the control of the controller.

[0028] In order to facilitate the detection of the position of the highest stroke and the lowest stroke of the slider, so as to automatically control the driving mechanism to stop the action when the slider reaches the highest stroke or the lowest stroke position, it also includes an upper proximity switch and a lower proximity switch, which are relatively installed on the upper bearing seat and the lower bearing seat, and are respectively in contact with the upper end face and the lower end face of the slider 7. At the same time, the upper proximity switch and the lower proximity switch are both connected to the input end of the controller.

[0029] As a preferred embodiment, the controller is a PLC controller. Further preferably, the controller is installed on the outer side wall of the bin body 14.

[0030] In the present invention, by setting the water collecting cover, it is convenient to utilize the characteristic that the cross-sectional area of ​​the open end is larger than the cross-sectional area of ​​the water pumping pipeline, effectively reducing the disturbance effect of the fluctuation of the water pump on the water absorption liquid surface, thereby not affecting the bottom flow concentration, and effectively ensuring the quality of the obtained filling body. A section of rigid water collecting pipeline is set at the upper end of the water collecting cover, which can be conveniently connected to the displacement adjustment mechanism through the transverse connecting rod, and connected to the distance sensor through the transverse bracket. In this way, on the one hand, it is convenient to use the displacement adjustment mechanism to change the vertical position of the rigid water collecting pipeline, and on the other hand, the distance sensor can also follow the water collecting cover to move vertically, thereby helping to detect the distance difference between the water collecting cover and the liquid surface in real time. Therefore, the distance difference can be used as feedback data to automatically adjust the height of the water collecting cover in the vertical direction, and finally the adjustment of the drainage port position can be realized intelligently. The water pump is connected to the rigid water collecting pipeline through the water pumping hose, which can ensure that the water collecting cover can always maintain a connected state with the water pump during the vertical movement process, and ensure that the drainage operation can be carried out continuously during the vertical movement process. By using a fixed frame to vertically and rotatably support the screw guide rail on the inner side of the bin body, and then connecting one end of the transverse connecting rod to the slider mounted on the screw guide rail, the slider and the water collecting cover can be driven to change their vertical displacement by rotating the screw guide rail. By installing a turbidity detection sensor inside the water collecting cover, the change of the suspended matter concentration in the water can be synchronously and accurately detected in real time during the pumping process, and then the change of the suspended matter concentration in the extracted overflow water can be sensed in real time, and the turbidity value of the water quality in the thickening bin can be monitored in real time, so that the height of the water collecting cover drain port can be automatically adjusted according to the change of turbidity. In this way, not only can the automatic control of drainage without dead angles be realized, but also the drainage volume and drainage time can be conveniently controlled, ensuring the efficiency and continuity of the drainage process. At the same time, the stability of drainage efficiency and water quality is ensured, and the unstable thickening effect caused by excessive or insufficient drainage is avoided, the quality of the filling body is guaranteed, and it is conducive to the subsequent high-quality filling operation. By arranging a main drainage regulating valve on the main drainage pipeline and an overflow drainage regulating valve on the overflow drainage pipeline, the overflow speed and flow rate of the overflow water can be conveniently adjusted during the drainage process using the overflow trough and the drainage process using the water collecting cover, thereby further reducing the disturbance effect of the fluctuation of the drainage action on the overflow water in the overflow area, thereby ensuring the stability of the drainage process, avoiding the occurrence of unstable thickening effect due to excessive drainage or excessive disturbance, ensuring the quality of the filling body, and effectively solving the problem of the step valve being easily blocked by tailings, reducing the maintenance cost of the equipment and improving the drainage efficiency.

[0031] The present invention significantly improves the intelligence of the thickener by setting up an intelligent drainage device, realizes the automatic drainage of overflow water, and effectively solves the problem that the step valve is easily blocked by tailings, reduces the maintenance cost of the equipment, and improves the drainage efficiency. The system has a high degree of intelligence, high control accuracy, and good environmental benefits. It realizes the automatic adjustment and control of the drainage volume and speed. Compared with traditional methods, it reduces the intervention of manual operation in the entire drainage operation process, reduces the labor input cost, and at the same time reduces the waste of water resources in the drainage process, and greatly improves production efficiency.

[0032] The present invention also provides a method for draining water from an intelligent lifting thickener based on turbidity monitoring, which uses an intelligent lifting thickener drainage system based on turbidity monitoring, and includes the following steps: Step 1: Send the treated tailings slurry into the bin 14 of the thickener, then add flocculant into the bin 14 to start flocculation and sedimentation operation. After the flocculation and sedimentation operation continues for a set time, execute step 2; Step 2: In the initial stage, the driving mechanism 18 is used to drive the screw guide rail 5 to rotate in the opposite direction, and the slider 7 and the transverse connecting rod 6 are simultaneously driven to move upward until the slider 7 moves to the highest stroke, and the driving mechanism 18 is controlled to stop the action. At this time, the distance sensor 19 moves to the upper end of the bin body 14 along with the rigid water collection pipe 15; Step 3: Use the liquid level sensor 21 to collect the liquid level height signal in real time and send it to the controller. At the same time, use the turbidity detection sensor 4 to collect the turbidity signal of the overflow water in real time and send it to the controller. The controller obtains the liquid level height data according to the liquid level signal, and obtains the turbidity value of the overflow water according to the turbidity signal. When the turbidity value is less than the set turbidity threshold and the liquid level height data is not lower than the overflow liquid level height of the overflow tank 9, execute S31. When the turbidity value is less than the set turbidity threshold and the liquid level height data is lower than the overflow liquid level height of the overflow tank 9, execute S32. When the turbidity value is greater than or equal to the set turbidity threshold, directly execute step 4. S31: The controller controls the overflow drainage regulating valve 22 to open and controls the main drainage regulating valve 23 to open, and uses the overflow tank 9 and the overflow drainage pipeline 20 to discharge the overflow liquid near the overflow tank 9 into the main drainage pipeline 11, and then discharges it into the overflow pool 12 through the main drainage pipeline 11; at the same time, the controller controls the valve opening of the overflow drainage regulating valve 22 according to the continuous change of the turbidity value. When the continuous change of the turbidity value is gentle, the current valve opening of the main overflow drainage regulating valve 22 is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the overflow drainage regulating valve 22 is controlled to decrease until the change of the turbidity value tends to be gentle, and then the current valve opening of the overflow drainage regulating valve 22 is kept unchanged; S32: Use the distance sensor 19 to collect the distance signal of the horizontal bracket 26 from the liquid surface in real time, and send it to the controller. The controller obtains the distance value A of the horizontal bracket 26 from the liquid surface according to the distance signal of the horizontal bracket 26 from the liquid surface, and compares the distance value A of the horizontal bracket 26 from the liquid surface with the distance value B of the horizontal bracket 26 from the water collecting cover 1. When the distance value A is greater than the distance value B, the control driving mechanism 18 drives the screw guide rail 5 to rotate forward, and simultaneously drives the slider 7 and the horizontal connecting rod 6 to move downward until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C, wherein the distance value C is less than the distance value B, and the control driving mechanism 18 stops the action. At the same time, the control overflow drainage regulating valve 22 is closed, the control main drainage regulating valve 10 is opened, and the main drainage regulating valve 23 is kept open, the water pump 3 is controlled to start working and provide negative pressure, and the overflow water is collected in a large range through the water collecting cover 1, and then discharged through the rigid collection The water pipeline 15, the water suction hose 2 and the main drainage pipeline 11 are discharged into the overflow pool 12. During the operation of the water pump 3, the controller compares the distance value A and the distance value B in real time. When the distance value A is greater than the distance value B, the driving mechanism 18 is controlled to drive the screw guide rail 5 to rotate forward, and the slider 7 and the transverse connecting rod 6 are synchronously driven to move downward until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C. The driving mechanism 18 is controlled to stop the action to realize the automatic following action in the process of pumping and draining water. At the same time, the controller controls the valve opening of the main drainage regulating valve 10 according to the continuous change of the turbidity value. When the continuous change of the turbidity value is slow, the current valve opening of the main drainage regulating valve 10 is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the main drainage regulating valve 10 is controlled to decrease until the change of the turbidity value tends to be smooth, and then the current valve opening of the main drainage regulating valve 10 is kept unchanged. Step 4: Control the water pump 3 to stop working. At the same time, time the turbidity duration when the turbidity value is greater than or equal to the set turbidity threshold. When the turbidity duration is less than the set duration, re-execute step 3. When the turbidity duration is greater than or equal to the set duration, control the alarm module 29 to perform an alarm action.

[0033] In order to facilitate the automatic shutdown control of the driving mechanism when the slider reaches the highest stroke and the lowest stroke position, in step one, the upper proximity switch is used to detect whether the slider 7 has reached the highest stroke. When the slider 7 reaches the highest stroke, the upper proximity switch is triggered and sends an upper stroke in place signal to the controller. After receiving the upper stroke in place signal, the controller controls the driving mechanism 18 to stop moving; in step two, the lower proximity switch is used to detect whether the slider 7 has reached the lowest stroke. When the slider 7 reaches the lowest stroke, the lower proximity switch is triggered and sends a lower stroke in place signal to the controller. After receiving the lower stroke in place signal, the controller controls the driving mechanism 18 to stop moving, controls the water pump 3 to stop moving, and at the same time, controls the alarm module 29 to perform a warning action.

[0034] In the present invention, in the initial stage, the distance measuring sensor is moved to the top of the bin along with the rigid water collecting pipe, so as to avoid the situation that the distance measuring sensor is submerged when the initial overflow water level is high. The turbidity detection sensor is first used to detect the turbidity value of the overflow water, and the turbidity value is compared with the set turbidity threshold value, so as to effectively judge whether the drainage condition of the overflow water is met. When the overflow water drainage condition is met, the liquid level height data sensed by the liquid level sensor is used as the action judgment basis. When the liquid level height data is higher than or equal to the overflow liquid level height of the overflow tank, the overflow tank and the overflow drainage pipe are directly used for drainage operation. When the liquid level height data is lower than the overflow liquid level height of the overflow tank, the water pump is used for drainage operation, which can effectively save the consumption of electric energy. When the overflow drainage pipe is used for drainage operation, the valve opening of the overflow drainage regulating valve is adjusted according to the continuous change of the turbidity value, which can effectively ensure that the fluctuation of the drainage action will not cause disturbance to the overflow water in the overflow area, which is conducive to ensuring that the concentration of the bottom flow will not be affected. In the process of drainage operation using a water pump, the distance value A between the horizontal support and the liquid surface is obtained through the distance sensor, and then the distance value A is compared with the distance value B between the horizontal support and the water collecting cover, and the water collecting cover is controlled to perform a follow-up action during the drainage process according to the comparison result, so that the position of the drainage port can be adjusted intelligently. In this way, automatic control of drainage without dead angles can be achieved, and the drainage volume and drainage time can be conveniently controlled, ensuring the efficiency and continuity of the drainage process. At the same time, the stability of drainage efficiency and water quality is ensured, and the unstable thickening effect caused by excessive or insufficient drainage is avoided. In the process of drainage operation using a water pump, the valve opening of the main drainage regulating valve is adjusted according to the continuous change of the turbidity value, which can effectively ensure that the fluctuation of the drainage action will not cause disturbance to the overflow water in the overflow area, ensure the quality of the obtained filling body, and facilitate the subsequent high-quality filling operation. In addition, it also effectively solves the problem that the step valve is easily blocked by tailings, reduces the maintenance cost of the equipment, and improves the drainage efficiency. When the turbidity value does not meet the drainage conditions of overflow water, the pump is promptly controlled to stop working until the turbidity value is less than the set turbidity threshold, and then the pump is restarted to drain the water, which can effectively ensure the appropriateness of drainage and prevent the occurrence of unstable thickening effects due to excessive or insufficient drainage, effectively ensuring the quality of the filling body. When the turbidity value is still greater than or equal to the turbidity threshold within the set technical time, the alarm module is controlled to perform an alarm action, which can timely and effectively remind relevant personnel when the production process has ended. This method has a high degree of intelligence, a simple implementation process, good environmental performance, and high drainage efficiency. It can realize the automated drainage of overflow water and obtain high-quality filling bodies. At the same time, it effectively solves the problem that the step valve is easily blocked by tailings.

Claims

1. An intelligent lifting thickener drainage system based on turbidity monitoring, comprising a bin body (14) and an overflow trough (9), wherein the overflow trough (9) is installed at the top of the bin body (14), and is characterized in that: It also includes smart drainage devices; The intelligent drainage device comprises a water collection mechanism (16), a displacement adjustment mechanism (17), a monitoring component, a power mechanism and a controller; The water collection mechanism (16) is arranged in the inner cavity of the bin body (14), and comprises a water collection cover (1) and a rigid water collection pipeline (15); the water collection cover (1) is arranged horizontally, and has a straight open end at its lower end, and a water permeable hole is opened at the center of its top end; the rigid water collection pipeline (15) is vertically fixedly connected to the top of the water collection cover (1), and its lower end is connected to the water permeable hole; The displacement adjustment mechanism (17) comprises a fixed frame (8), a screw guide rail (5), a slider (7), a driving mechanism (18) and a transverse connecting rod (6); the fixed frame (8) is vertically mounted on a side wall inside the bin body (14), and its upper end extends to the top of the bin body (14); the screw guide rail (5) is vertically arranged and rotatably mounted in the fixed frame (8); a threaded hole is arranged inside the slider (7), and is sleeved on the outside of the screw guide rail (5) through threaded matching, and at the same time, its side surface close to the outside is in sliding contact with the fixed frame (8); the driving mechanism (18) is mounted on the top of the fixed frame (8), and its output end is connected to the upper end of the screw guide rail (5) for driving the rotation of the screw guide rail (5); the transverse connecting rod (6) is horizontally arranged, and its outer end is vertically fixedly connected to the inner side of the slider (7), and its inner end is vertically fixedly connected to the lower part of the rigid water collecting pipe (15); The monitoring assembly comprises a turbidity detection sensor (4), a distance sensor (19) and a liquid level sensor (21); the turbidity detection sensor (4) is mounted inside the water collecting cover (1); the distance sensor (19) is mounted on one side of the upper end of the rigid water collecting pipe (15) via a transverse bracket (26), with its detection surface facing downward, and is used to detect in real time a distance signal between the transverse bracket (26) and the liquid surface; the liquid level sensor (21) is mounted on the inner side wall of the bin body (14), and is used to detect in real time a liquid level height signal; The power mechanism comprises a water suction hose (2), a main drainage pipeline (11), a water suction pump (3), an overflow drainage pipeline (20), a main drainage regulating valve (10), an overflow drainage regulating valve (22) and a total drainage regulating valve (23); the water suction pump (3) is installed at the top of the bin body (14) or outside the bin body (14), its inlet end is connected to the upper end of the rigid water collection pipeline (15) through the water suction hose (2), and its outlet end is connected to the main drainage pipeline (11). The inlet end of the overflow drainage pipeline (20) is connected to the water outlet at one end of the overflow tank (9), and the outlet end thereof is connected to the middle section of the main drainage pipeline (11); the main drainage regulating valve (10) is connected in series to the water inlet section of the main drainage pipeline (11); the overflow drainage regulating valve (22) is connected in series to the middle section of the overflow drainage pipeline (20); and the main drainage regulating valve (23) is connected in series to the water outlet section of the main drainage pipeline (11); The input end of the controller is respectively connected to the turbidity detection sensor (4), the distance sensor (19) and the liquid level sensor (21), and the output end is respectively connected to the driving mechanism (18), the water pump (3), the main drainage regulating valve (10), the overflow drainage regulating valve (22) and the total drainage regulating valve (23).

2. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 1 is characterized in that: The transverse connecting rod (6) is a linear electric telescopic rod, and the output end of the controller is also connected to the linear electric telescopic rod.

3. An intelligent lifting thickener drainage system based on turbidity monitoring according to claim 1 or 2, characterized in that: The water collecting cover (1) is a box-type structure with an open lower end, and the water permeable hole is arranged in the central area of ​​the top plate of the water collecting cover (1).

4. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 3 is characterized in that: It also includes an overflow pool (12), which is installed on one side outside the bin body (14), and its inlet end is connected to the outlet end of the main drainage pipeline (11).

5. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 4 is characterized in that: An upper bearing seat (27) and a lower bearing seat (28) are mounted oppositely at the upper and lower ends of the fixing frame (8), and an upper bearing and a lower bearing are mounted in the upper bearing seat (27) and the lower bearing seat (28), respectively; and the upper and lower ends of the screw guide rail (5) are rotatably connected to the upper bearing seat (27) and the lower bearing seat (28) via the upper bearing and the lower bearing, respectively.

6. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 5 is characterized in that: It also includes an alarm module (29), which is mounted on the outer wall of the bin body (14) and connected to the output end of the controller, and is used to execute an alarm action according to the control of the controller.

7. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 6 is characterized in that: It also includes an upper proximity switch and a lower proximity switch, which are relatively mounted on the upper bearing seat (27) and the lower bearing seat (28) and respectively contact and cooperate with the upper end surface and the lower end surface of the slider (7). At the same time, the upper proximity switch and the lower proximity switch are both connected to the input end of the controller.

8. The intelligent lifting thickener drainage system based on turbidity monitoring according to claim 7 is characterized in that: The controller is a PLC controller.

9. A method for draining water from an intelligent lifting thickener based on turbidity monitoring, using an intelligent lifting thickener drainage system based on turbidity monitoring as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: sending the treated tailings slurry into the bin (14) of the thickener, adding flocculant into the bin (14), starting the flocculation and sedimentation operation, and executing step 2 after the flocculation and sedimentation operation continues for a set time; Step 2: In the initial stage, the drive mechanism (18) is used to drive the screw guide rail (5) to rotate in the opposite direction, thereby simultaneously driving the slider (7) and the transverse connecting rod (6) to move upward until the slider (7) moves to the highest stroke, and then the drive mechanism (18) is controlled to stop the action. At this time, the distance measuring sensor (19) moves with the rigid water collection pipe (15) to the upper side of the upper end of the bin body (14); Step 3: Using the liquid level sensor (21) to collect the liquid level height signal in real time and send it to the controller. At the same time, using the turbidity detection sensor (4) to collect the turbidity signal of the overflow water in contact in real time and send it to the controller. The controller obtains the liquid level height data according to the liquid level signal, and obtains the turbidity value of the overflow water according to the turbidity signal. When the turbidity value is less than the set turbidity threshold and the liquid level height data is not less than the overflow liquid level height of the overflow tank (9), S31 is executed. When the turbidity value is less than the set turbidity threshold and the liquid level height data is less than the overflow liquid level height of the overflow tank (9), S32 is executed. When the turbidity value is greater than or equal to the set turbidity threshold, step 4 is directly executed. S31: the controller controls the overflow drainage regulating valve (22) to open and controls the main drainage regulating valve (23) to open, and uses the overflow trough (9) and the overflow drainage pipeline (20) to discharge the overflow liquid near the overflow trough (9) into the main drainage pipeline (11), and then discharges it into the overflow pool (12) through the main drainage pipeline (11); at the same time, the controller controls the valve opening of the overflow drainage regulating valve (22) according to the continuous change of the turbidity value. When the continuous change of the turbidity value is gentle, the current valve opening of the main overflow drainage regulating valve (22) is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the overflow drainage regulating valve (22) is controlled to decrease until the change of the turbidity value tends to be gentle, and then the current valve opening of the overflow drainage regulating valve (22) is kept unchanged; S32: Using the distance measuring sensor (19) to collect the distance signal between the transverse support (26) and the liquid surface in real time, and send it to the controller. The controller obtains the distance value A between the transverse support (26) and the liquid surface according to the distance signal between the transverse support (26) and the liquid surface, and compares the distance value A between the transverse support (26) and the liquid surface with the distance value B between the transverse support (26) and the water collecting cover (1). When the distance value A is greater than the distance value B, the driving mechanism (18) is controlled to drive the screw guide rail (5) to rotate in the forward direction, and the synchronous belt The movable slider (7) and the transverse connecting rod (6) move downward until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C, wherein the distance value C is less than the distance value B, and the driving mechanism (18) is controlled to stop the action. At the same time, the overflow drainage regulating valve (22) is controlled to close, the main drainage regulating valve (10) is controlled to open, and the main drainage regulating valve (23) is kept open. The water pump (3) is controlled to start working and provide negative pressure, and the overflow water is collected over a large area through the water collecting cover (1), and then the overflow water is discharged through the water collecting cover (1). The rigid water collection pipeline (15), the water suction hose (2) and the main drainage pipeline (11) are discharged into the overflow pool (12). During the operation of the water suction pump (3), the controller compares the distance value A and the distance value B in real time. When the distance value A is greater than the distance value B, the control driving mechanism (18) drives the screw guide rail (5) to rotate in the positive direction, and simultaneously drives the slider (7) and the transverse connecting rod (6) to move downward, until the distance value A is less than or equal to the distance value B, and the distance value A is greater than or equal to the set distance value C, the control driving mechanism (18) ) stops the action to realize the automatic following action in the process of pumping and draining water. At the same time, the controller controls the valve opening of the main drainage regulating valve (10) according to the continuous change of the turbidity value. When the continuous change of the turbidity value is gentle, the current valve opening of the main drainage regulating valve (10) is kept unchanged. When the continuous change of the turbidity value is drastic, the valve opening of the main drainage regulating valve (10) is controlled to decrease until the change of the turbidity value tends to be gentle, and then the current valve opening of the main drainage regulating valve (10) is kept unchanged. Step 4: Control the water pump (3) to stop working. At the same time, count the duration of turbidity when the turbidity value is greater than or equal to the set turbidity threshold. When the turbidity duration is less than the set duration, re-execute step 3. When the turbidity duration is greater than or equal to the set duration, control the alarm module (29) to perform an alarm action.

10. The intelligent lifting thickener drainage method based on turbidity monitoring according to claim 9, characterized in that: In step one, an upper proximity switch is used to detect whether the slider (7) has reached the highest stroke position. When the slider (7) has reached the highest stroke position, the upper proximity switch is triggered and sends an upper stroke in-place signal to the controller. After receiving the upper stroke in-place signal, the controller controls the drive mechanism (18) to stop. In step two, a lower proximity switch is used to detect whether the slider (7) has reached the lowest stroke position. When the slider (7) has reached the lowest stroke position, the lower proximity switch is triggered and sends a lower stroke in-place signal to the controller. After receiving the lower stroke in-place signal, the controller controls the drive mechanism (18) to stop, controls the water pump (3) to stop, and at the same time controls the alarm module (29) to perform an alarm action.

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