Concentrate pond monitoring device and method

Abstract

The present application relates to coal washing technology field and disclose a kind of thickening tank monitoring device and method, including multiple flocculation layer turbidity sensors, multiple clear water layer turbidity sensors and control unit;Multiple flocculation layer turbidity sensors are arranged in thickening tank, and flocculation layer turbidity sensor is used to monitor the turbidity of flocculation layer;Multiple clear water layer turbidity sensors are arranged in overflow tank on the top of thickening tank, and clear water layer turbidity sensor is used to monitor the turbidity of clear water layer;Control unit is connected with flocculation layer turbidity sensor and clear water layer turbidity sensor, and control unit is used to receive the turbidity data monitored by flocculation layer turbidity sensor and clear water layer turbidity sensor;The thickening tank monitoring device of the embodiment of the present application, the direct monitoring of flocculation layer turbidity in thickening tank is realized by flocculation layer turbidity sensor, and the settlement abnormal signal of flocculation layer is captured in advance, effectively shorten the response time of production adjustment, reduce the occurrence probability of black water phenomenon.

Description

Technical Field

[0001] This invention belongs to the field of coal washing and beneficiation technology, specifically relating to a monitoring device and method for a thickener. Background Technology

[0002] The thickener is an important component of the thickener, used to contain the slurry to be treated and providing a site for solid-liquid separation. During the thickening and settling process, flocculants are typically added. These flocculants adsorb onto the surface of the coal slime particles, forming larger flocs. The settling velocity of these flocs is much greater than that of individual coal slime particles, thus achieving rapid settling of the coal slime water.

[0003] In actual production, changes in coal quality, coal slime quantity, flocculant efficacy, and water quality can cause black water seepage in the thickener, leading to a series of abnormal phenomena. Current technology typically involves installing a turbidity meter in the overflow tank to monitor whether black water is seeping into the thickener. However, when black water is detected, it takes time to adjust the flocculant until the black water disappears, easily causing production adjustment delays. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a thickener monitoring device that can predict signs of blackening in the thickener in advance, enabling operators to adjust chemicals promptly and effectively to prevent the occurrence of blackening.

[0005] The thickener monitoring device of this invention includes: Multiple turbidity sensors for the flocculation layer are installed in the thickening tank, and the turbidity sensors for the flocculation layer are used to monitor the turbidity of the flocculation layer. Multiple turbidity sensors for the clear water layer are installed in the overflow trough at the top of the thickening tank. The turbidity sensors for the clear water layer are used to monitor the turbidity of the clear water layer. A control unit is connected to the turbidity sensor of the flocculent layer and the turbidity sensor of the clear water layer. The control unit is used to receive turbidity data monitored by the turbidity sensor of the flocculent layer and the turbidity sensor of the clear water layer. When the turbidity of the flocculation layer exceeds a preset value, the control unit sends a dosing signal. After dosing, the control unit determines whether the thickening tank will produce black water based on the turbidity data of the clear water layer.

[0006] The thickener monitoring device of this invention directly monitors the turbidity of the flocculation layer in the thickener using a turbidity sensor, capturing abnormal sedimentation signals in advance and overcoming the lag of relying solely on clear water layer monitoring, thus enabling proactive control of chemical dosing. The clear water layer turbidity sensor verifies the turbidity of the clear water layer after chemical dosing, accurately determining whether black water is occurring in the thickener, providing dual data references for production adjustments. The control unit centrally receives and processes turbidity data from both the flocculation layer and the clear water layer, automatically triggering dosing signals and determining black water occurrence, improving the automation level of thickener monitoring and control and reducing errors from manual intervention. Through collaborative monitoring by the flocculation layer and clear water layer turbidity sensors, chemical dosing control has clear pre-emptive basis, and black water determination has accurate result verification, forming a complete monitoring closed loop from abnormal warning to control execution and result determination, effectively shortening the response time for production adjustments and reducing the probability of black water occurrence.

[0007] In some embodiments, a plurality of the flocculent layer turbidity sensors are evenly spaced along the circumferential direction in the thickening tank, and at least some of the flocculent layer turbidity sensors are arranged on the same horizontal plane.

[0008] In some embodiments, the control unit presets a turbidity error value 'a' for the flocculation layer. When the difference between the maximum and minimum values ​​monitored by the multiple turbidity sensors of the flocculation layer is greater than the error value 'a', the control unit sends a sensor check signal.

[0009] In some embodiments, the turbidity of the flocculent layer is the average value of monitoring data from a plurality of flocculent layer turbidity sensors.

[0010] In some embodiments, a plurality of the clear water layer turbidity sensors are evenly spaced along the circumferential direction in the overflow tank, and at least some of the clear water layer turbidity sensors are arranged on the same horizontal plane.

[0011] In some embodiments, the control unit presets a turbidity error value b for the clear water layer. When the difference between the maximum and minimum values ​​monitored by the multiple turbidity sensors of the clear water layer is greater than the error value b, the control unit sends a sensor check signal.

[0012] In some embodiments, the turbidity of the clear water layer is the average value of monitoring data from a plurality of clear water layer turbidity sensors.

[0013] In some embodiments, the thickener monitoring device further includes a flow stabilizer and a feed pipe. The flow stabilizer is located at the center of the thickener. One end of the feed pipe is connected to the flow stabilizer, and the other end of the feed pipe is connected to a coal slurry water supply device. The feed pipe is used to supply coal slurry water to the thickener, and the flow stabilizer is used to stabilize the flow field in the thickener.

[0014] In some embodiments, the thickener monitoring device further includes a stirring frame and a drive unit. The stirring frame is connected to the output end of the drive unit, and the drive unit is used to drive the stirring frame to rotate. The stirring frame is disposed in the thickener and is used to mix coal slurry water with flocculant.

[0015] The thickener monitoring method of this invention, utilizing any of the thickener monitoring devices described above, includes the following steps: Start monitoring: Start the thickener and monitoring device. Multiple turbidity sensors in the flocculation layer continuously monitor the turbidity of the flocculation layer in the thickener, and multiple turbidity sensors in the clear water layer continuously monitor the turbidity of the clear water layer in the overflow trough at the top of the thickener. The monitored turbidity data is transmitted to the control unit in real time. Dosing control: The control unit receives and processes turbidity data. When the turbidity of the flocculant layer exceeds the preset value, the control unit sends a dosing signal to the dosing system to control the dosing system to adjust the flocculant dosage. Black water detection: After chemical dosing, the control unit continuously receives turbidity data of the clear water layer monitored by the turbidity sensor. By comparing the turbidity data with the preset clear water layer detection threshold, it determines whether black water has occurred in the thickener. If the turbidity data of the clear water layer does not exceed the preset clear water layer detection threshold, it is determined that no black water has occurred. If it exceeds the threshold, it is determined that black water has occurred and an adjustment warning is issued.

[0016] The thickener monitoring method of this invention achieves continuous real-time monitoring of the turbidity of the flocculation layer through a turbidity sensor, enabling the control unit to promptly detect sedimentation anomalies and realize pre-emptive chemical dosing control, overcoming the lag in traditional monitoring. The control unit automatically receives and processes turbidity data and sends chemical dosing signals, automating chemical dosing control and improving control response efficiency. A clear water layer turbidity sensor continuously monitors the clear water layer after chemical dosing, allowing the control unit to accurately determine black water formation, providing a clear basis for production adjustments. The control unit achieves fully automated integration of monitoring, chemical dosing, and determination, forming a standardized thickener monitoring and control process, reducing manual intervention, improving the timeliness and accuracy of production control, and effectively reducing the probability of black water formation. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the present invention.

[0018] Figure 2 This is a top view of the present invention.

[0019] Figure 3 This is a schematic diagram of the mounting bracket in this invention.

[0020] Figure 4 This is a schematic diagram of the structure of the stirring rack in this invention.

[0021] Figure label: 1. Turbidity sensor for flocculation layer; 2. Thickening tank; 3. Turbidity sensor for clear water layer; 4. Overflow trough; 5. Flow stabilizer; 6. Feed pipe; 7. Stirring rack; 8. Drive unit; 9. Mounting rack; 10. Mounting plate. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1-4 As shown, the thickener monitoring device of this embodiment includes multiple turbidity sensors 1 for the flocculation layer, multiple turbidity sensors 3 for the clear water layer, and a control unit.

[0024] Multiple turbidity sensors 1 for the flocculation layer are installed in the thickening tank 2. The turbidity sensors 1 for the flocculation layer are used to monitor the turbidity of the flocculation layer. Multiple clear water layer turbidity sensors 3 are installed in the overflow trough 4 at the top of the thickening tank 2. The clear water layer turbidity sensors 3 are used to monitor the turbidity of the clear water layer. The control unit is connected to the turbidity sensor 1 in the flocculent layer and the turbidity sensor 3 in the clear water layer. The control unit is used to receive the turbidity data monitored by the turbidity sensor 1 in the flocculent layer and the turbidity sensor 3 in the clear water layer. When the turbidity of the flocculation layer exceeds the preset value, the control unit sends a dosing signal. After dosing, the control unit determines whether the thickening tank will produce black water based on the turbidity data of the clear water layer.

[0025] The thickener monitoring device of this invention directly monitors the turbidity of the flocculation layer in the thickener using a turbidity sensor, capturing abnormal sedimentation signals in advance and overcoming the lag of relying solely on clear water layer monitoring, thus enabling proactive control of chemical dosing. The clear water layer turbidity sensor verifies the turbidity of the clear water layer after chemical dosing, accurately determining whether black water is occurring in the thickener, providing dual data references for production adjustments. The control unit centrally receives and processes turbidity data from both the flocculation layer and the clear water layer, automatically triggering dosing signals and determining black water occurrence, improving the automation level of thickener monitoring and control and reducing errors from manual intervention. Through collaborative monitoring by the flocculation layer and clear water layer turbidity sensors, chemical dosing control has clear pre-emptive basis, and black water determination has accurate result verification, forming a complete monitoring closed loop from abnormal warning to control execution and result determination, effectively shortening the response time for production adjustments and reducing the probability of black water occurrence.

[0026] Specifically, multiple turbidity sensors 1 for the flocculation layer are installed in the thickener 2 to continuously monitor the turbidity of the flocculation layer in the thickener 2, and multiple turbidity sensors 3 for the clear water layer are installed in the overflow trough 4 at the top of the thickener 2 to continuously monitor the turbidity of the clear water layer in the overflow trough 4. The turbidity sensors 1 for the flocculation layer and turbidity sensors 3 for the clear water layer transmit the turbidity data they monitor to the control unit connected to them in real time. The control unit receives and processes the turbidity data. When the turbidity of the flocculation layer exceeds the preset value of the control unit, the control unit immediately sends a dosing signal. After the dosing operation is completed, the control unit continues to receive the turbidity data of the clear water layer transmitted by the turbidity sensors 3 for the clear water layer, and uses this data as a basis to determine whether the thickener 2 has experienced black water blooming.

[0027] Furthermore, blackening of the water is an abnormal phenomenon in the operation of thickeners (especially in the coal washing field). The core definition is: after the coal slurry water in the thickener has undergone flocculation and sedimentation, the upper clear water layer (the overflow water that is eventually discharged from the overflow trough), which should be clear and transparent (or nearly colorless), shows obvious black or grayish-black color, or a sharp increase in turbidity.

[0028] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple turbidity sensors 1 of the flocculation layer are evenly spaced along the circumference in the thickening tank 2, and at least some of the turbidity sensors 1 of the flocculation layer are set on the same horizontal plane.

[0029] The thickener monitoring device of this invention achieves uniform monitoring of the flocculation layer in the thickener along its circumference using flocculation layer turbidity sensors, avoiding the bias of turbidity data caused by local monitoring and accurately reflecting the overall settling state of the flocculation layer. The simultaneous horizontal arrangement of the flocculation layer turbidity sensors ensures the comparability of turbidity monitoring data at the same settling height, allowing the control unit's judgment of flocculation layer turbidity to better reflect actual working conditions. Furthermore, the regular arrangement of the flocculation layer turbidity sensors makes the distribution of monitoring points more scientific, improving the comprehensiveness and accuracy of monitoring data and providing more reliable data support for the control unit's dosing signal transmission.

[0030] Specifically, the turbidity sensors 1 of the flocculation layer are arranged in a circular direction and are evenly distributed in the thickening tank 2. At least some of the turbidity sensors 1 of the flocculation layer are located on the same horizontal plane in the thickening tank 2. Each turbidity sensor 1 of the flocculation layer synchronously monitors the turbidity of the flocculation layer at its location and transmits the monitored turbidity data to the control unit, so as to realize full coverage monitoring of turbidity at different circumferential positions and the same horizontal height of the flocculation layer in the thickening tank 2.

[0031] In some embodiments, the control unit presets a turbidity error value a for the flocculation layer. When the difference between the maximum and minimum values ​​monitored by the multiple turbidity sensors 1 for the flocculation layer is greater than the error value a, the control unit sends a sensor check signal.

[0032] The thickener monitoring device of this invention realizes difference analysis and threshold comparison of the monitoring data of the turbidity sensor in the flocculation layer through the control unit, automatically identifies the monitoring anomalies of the sensor, and promptly detects the distortion of the monitoring data; the turbidity error value of the flocculation layer preset by the control unit forms the judgment standard for the sensor monitoring status, so that the sensor anomaly inspection has a clear quantitative basis and avoids the blindness of manual investigation.

[0033] Specifically, the control unit has a preset turbidity error value 'a' for the flocculation layer. After multiple turbidity sensors 1 transmit the monitored turbidity data of the flocculation layer to the control unit, the control unit processes the monitoring data of all flocculation layer turbidity sensors 1, calculates the difference between the maximum and minimum values ​​in the monitored data, and compares this difference with the preset turbidity error value 'a' for the flocculation layer. When the difference is greater than the turbidity error value 'a' for the flocculation layer, the control unit immediately sends a sensor check signal, prompting the flocculation layer turbidity sensor 1 to be checked.

[0034] In some embodiments, the turbidity of the flocculent layer is the average value of monitoring data from multiple flocculent layer turbidity sensors 1.

[0035] The thickener monitoring device of this invention performs average processing on the monitoring data of the turbidity sensor in the flocculation layer through the control unit, thereby offsetting the local monitoring deviation of a single sensor and making the turbidity judgment value of the flocculation layer more consistent with the actual working conditions. The control unit realizes the automatic average calculation of the monitoring data, avoiding the errors and lags of manual data processing and improving the accuracy of turbidity judgment.

[0036] Specifically, multiple turbidity sensors 1 transmit the turbidity data of the flocculation layer in the thickening tank 2 that they monitor to the control unit in real time. After receiving the monitoring data from all the turbidity sensors 1, the control unit performs average calculation on the data and uses the average value as the actual turbidity value of the flocculation layer in the thickening tank 2. Based on this, it determines whether the preset value is exceeded and performs subsequent operations.

[0037] In some embodiments, such as Figure 1 , Figure 2 As shown, multiple clear water layer turbidity sensors 3 are evenly spaced along the circumference in the overflow tank 4, and at least some of the clear water layer turbidity sensors 3 are arranged on the same horizontal plane.

[0038] The thickener monitoring device of this invention achieves uniform monitoring of the clear water layer in the overflow tank along the circumference using clear water layer turbidity sensors, avoiding the bias of turbidity data caused by local monitoring and accurately reflecting the overall water quality status of the clear water layer. The simultaneous horizontal arrangement of the clear water layer turbidity sensors ensures the comparability of turbidity data at the same monitoring height, allowing the control unit to make a more objective judgment on the turbidity of the clear water layer. The regular arrangement of the clear water layer turbidity sensors makes the distribution of monitoring points for turbidity in the clear water layer more scientific, improving the comprehensiveness of monitoring data and providing reliable data support for the determination of black water contamination.

[0039] Specifically, multiple clear water layer turbidity sensors 3 are arranged in a circular direction and are evenly spaced in the overflow trough 4 at the top of the thickening tank 2. At least some of the clear water layer turbidity sensors 3 are located on the same horizontal plane in the overflow trough 4. Each clear water layer turbidity sensor 3 synchronously monitors the turbidity of the clear water layer at its location and transmits the monitored turbidity data to the control unit in real time, so as to achieve full coverage monitoring of turbidity at different circumferential positions and the same horizontal height of the clear water layer in the overflow trough 4.

[0040] In some embodiments, the control unit presets a turbidity error value b for the clear water layer. When the difference between the maximum and minimum values ​​monitored by the multiple clear water layer turbidity sensors 3 is greater than the error value b, the control unit sends a sensor check signal.

[0041] The thickener monitoring device of this invention uses a control unit to perform differential analysis and threshold comparison of the monitoring data from the turbidity sensor in the clear water layer, automatically identifying monitoring anomalies in the clear water layer sensor and promptly detecting data distortion. The control unit presets a turbidity error value for the clear water layer to form a quantitative judgment standard for the monitoring status of the sensor, avoiding the blindness and randomness of manual inspection. The control unit sends inspection sensor signals to provide timely warnings of clear water layer sensor anomalies, ensuring the effectiveness of the turbidity monitoring data and making the determination of black water more accurate.

[0042] Specifically, the control unit has a preset turbidity error value b for the clear water layer. After multiple clear water layer turbidity sensors 3 transmit the monitored turbidity data of the clear water layer in the overflow tank 4 to the control unit, the control unit processes the monitoring data of all clear water layer turbidity sensors 3, calculates the difference between the maximum and minimum values ​​in the monitoring data, and compares this difference with the preset turbidity error value b for the clear water layer. When the difference is greater than the turbidity error value b for the clear water layer, the control unit immediately sends a sensor check signal to prompt the clear water layer turbidity sensor 3 to be checked.

[0043] In some embodiments, the turbidity of the clear water layer is the average value of monitoring data from multiple clear water layer turbidity sensors 3.

[0044] The thickener monitoring device of this invention performs averaging processing on the monitoring data of the clear water layer turbidity sensor through the control unit, offsetting the local monitoring deviation of a single sensor, so that the judgment value of the clear water layer turbidity is more consistent with the actual water quality of the overflow tank; the control unit realizes automated averaging calculation of the clear water layer monitoring data, improving the efficiency and accuracy of black water determination and reducing the error of manual intervention; through the averaging calculation rules of the control unit, the determination of clear water layer turbidity has a unified standard, ensuring the objectivity of the black water determination result and providing a reliable basis for production adjustment and early warning.

[0045] Specifically, multiple clear water layer turbidity sensors 3 transmit the turbidity data of the clear water layer in the overflow tank 4 that they monitor to the control unit in real time. After receiving the monitoring data from all the clear water layer turbidity sensors 3, the control unit performs average calculation on the data and uses the obtained average value as the actual turbidity value of the clear water layer in the overflow tank 4. Based on this, it compares with the preset clear water layer judgment threshold to complete the black water determination.

[0046] In some embodiments, such as Figure 1 , Figure 2 As shown, the thickener monitoring device also includes a flow stabilizer 5 and a feed pipe 6. The flow stabilizer 5 is located at the center of the thickener 2. One end of the feed pipe 6 is connected to the flow stabilizer 5, and the other end of the feed pipe 6 is connected to the coal slurry water supply equipment. The feed pipe 6 is used to supply coal slurry water to the thickener 2, and the flow stabilizer 5 is used to stabilize the flow field in the thickener 2.

[0047] The thickener monitoring device of this invention weakens the impact of coal slurry water during feeding through a flow stabilizer, avoiding turbulent flow in the thickener from affecting the normal settling of the flocculated layer, ensuring the stable formation of the flocculated layer, and making the monitoring data of the turbidity sensor of the flocculated layer more consistent with the actual settling state; the feed pipe enables directional transportation of coal slurry water, allowing it to enter the thickener evenly after being buffered by the flow stabilizer, further optimizing the flow field distribution within the tank; the flow stabilizer stabilizes the flow field within the thickener, reducing the interference of flow field fluctuations on the turbidity sensor monitoring, improving the stability and accuracy of turbidity monitoring data of the flocculated layer and the clear water layer, and providing a more reliable data basis for the control unit's regulation.

[0048] Specifically, the flow stabilizer 5 is fixedly installed at the center of the thickener 2. One end of the feed pipe 6 is connected to the flow stabilizer 5, and the other end is connected to the coal slurry water supply equipment. The coal slurry water supplied by the coal slurry water supply equipment enters the flow stabilizer 5 through the feed pipe 6. The flow stabilizer 5 performs flow stabilization treatment on the incoming coal slurry water, weakens the impact of the coal slurry water entering the thickener 2, and allows the coal slurry water to enter the thickener 2 in a stable state, stabilizing the overall flow field inside the thickener 2. It works in conjunction with the turbidity sensor 1 of the flocculation layer and the turbidity sensor 3 of the clear water layer to complete turbidity monitoring.

[0049] In some embodiments, such as Figure 1 , Figure 2 , Figure 4 As shown, the thickener monitoring device also includes a stirring frame 7 and a drive unit 8. The stirring frame 7 is connected to the output end of the drive unit 8. The drive unit 8 is used to drive the stirring frame 7 to rotate. The stirring frame 7 is set in the thickener 2 and is used to mix coal slurry water with flocculant.

[0050] The thickener monitoring device of this invention drives the stirring frame to rotate via a drive component, thereby achieving mechanical mixing of coal slurry and flocculant. This improves the fusion efficiency and uniformity of the two, promotes the rapid and stable formation of flocs, and optimizes the flocculation and sedimentation effect. The stirring action of the stirring frame allows the flocculant to fully exert its function, reducing waste and improving the sedimentation quality of the flocculated layer. This also enables the turbidity sensor to accurately capture the true turbidity state of the flocculated layer. The cooperation between the stirring frame and the drive component ensures effective mixing of coal slurry and flocculant in the thickener, guaranteeing the stable formation of the flocculated layer and further improving the solid-liquid separation efficiency of the thickener. This makes turbidity monitoring and dosing control more practically significant.

[0051] Specifically, the stirring rack 7 is installed inside the thickening tank 2 and is connected to the output end of the drive component 8. After the drive component 8 is started, it drives the output end to rotate, thereby driving the stirring rack 7 to rotate inside the thickening tank 2. The rotating stirring rack 7 stirs and mixes the coal slurry water and flocculant in the thickening tank 2, so that the flocculant and coal slurry water can fully contact and evenly blend, promoting the formation of a stable flocculent layer of coal slurry particles. The turbidity of the flocculent layer is monitored in conjunction with the turbidity sensor 1 of the flocculent layer.

[0052] In some embodiments, such as Figure 3 As shown, the thickener monitoring device also includes a mounting frame 9, and multiple turbidity sensors 1 of the flocculation layer are evenly arranged on the mounting frame 9 along the circumferential direction. Two mounting plates 10 are arranged on the mounting frame 9 along the circumferential direction, and the mounting plates 10 are connected to the inner wall of the thickener 2.

[0053] The thickener monitoring device of this invention uses a mounting frame to centrally and systematically arrange multiple turbidity sensors in the flocculation layer, ensuring a uniform distribution of the sensors along the circumferential direction, making the monitoring point layout more accurate, and improving the comprehensiveness of turbidity monitoring in the flocculation layer.

[0054] Specifically, the mounting frame 9 is installed inside the thickening tank 2. Multiple flocculation layer turbidity sensors 1 are evenly fixed on the mounting frame 9 along the circumferential direction. Two mounting plates 10 are arranged on the mounting frame 9 along the circumferential direction. The two mounting plates 10 are connected to the inner wall of the thickening tank 2. The mounting frame 9 is stably fixed in the preset position inside the thickening tank 2 by the mounting plates 10, so that the flocculation layer turbidity sensors 1 maintain the set deployment posture and monitoring height, continuously monitor the turbidity of the corresponding position of the flocculation layer in the thickening tank 2, and transmit the monitoring data to the control unit.

[0055] The thickener monitoring method of this invention, utilizing any of the thickener monitoring devices described above, includes the following steps: Start monitoring: Start the thickener and monitoring device. Multiple turbidity sensors in the flocculation layer continuously monitor the turbidity of the flocculation layer in the thickener, and multiple turbidity sensors in the clear water layer continuously monitor the turbidity of the clear water layer in the overflow trough at the top of the thickener. The monitored turbidity data is transmitted to the control unit in real time. Dosing control: The control unit receives and processes turbidity data. When the turbidity of the flocculant layer exceeds the preset value, the control unit sends a dosing signal to the dosing system to control the dosing system to adjust the flocculant dosage. Black water detection: After chemical dosing, the control unit continuously receives turbidity data of the clear water layer monitored by the turbidity sensor. By comparing the turbidity data with the preset clear water layer detection threshold, it determines whether black water has occurred in the thickener. If the turbidity data of the clear water layer does not exceed the preset clear water layer detection threshold, it is determined that no black water has occurred. If it exceeds the threshold, it is determined that black water has occurred and an adjustment warning is issued.

[0056] The thickener monitoring method of this invention achieves continuous real-time monitoring of the turbidity of the flocculation layer through a turbidity sensor, enabling the control unit to promptly detect sedimentation anomalies and realize pre-emptive chemical dosing control, overcoming the lag in traditional monitoring. The control unit automatically receives and processes turbidity data and sends chemical dosing signals, automating chemical dosing control and improving control response efficiency. A clear water layer turbidity sensor continuously monitors the clear water layer after chemical dosing, allowing the control unit to accurately determine black water formation, providing a clear basis for production adjustments. The control unit achieves fully automated integration of monitoring, chemical dosing, and determination, forming a standardized thickener monitoring and control process, reducing manual intervention, improving the timeliness and accuracy of production control, and effectively reducing the probability of black water formation.

[0057] Specifically, the monitoring device enters the working state after the thickener is started. The turbidity sensor 1 of the flocculation layer continuously monitors the turbidity of the flocculation layer in the thickener 2, and the turbidity sensor 3 of the clear water layer continuously monitors the turbidity of the clear water layer in the overflow tank 4. Both transmit the turbidity data to the control unit in real time. The control unit receives and processes the turbidity data. When the turbidity of the flocculation layer exceeds the preset value, the control unit sends a dosing signal to the dosing system to adjust the flocculant dosage. After the dosing operation is completed, the control unit continuously receives the turbidity data of the clear water layer and compares it with the preset clear water layer judgment threshold. If it does not exceed the threshold, it is determined that there is no black water. If it exceeds the threshold, it is determined that black water has appeared and an adjustment warning is issued.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A monitoring device for a thickener, characterized in that, include: Multiple turbidity sensors (1) are installed in a thickening tank (2) to monitor the turbidity of the flocculation layer. Multiple turbidity sensors (3) are installed in the overflow trough (4) at the top of the thickening tank (2). The turbidity sensors (3) are used to monitor the turbidity of the clear water layer. Control unit, the control unit is connected to the turbidity sensor (1) of the flocculation layer and the turbidity sensor (3) of the clear water layer, the control unit is used to receive the turbidity data monitored by the turbidity sensor (1) of the flocculation layer and the turbidity sensor (3) of the clear water layer; When the turbidity of the flocculation layer exceeds a preset value, the control unit sends a dosing signal. After dosing, the control unit determines whether the thickening tank will produce black water based on the turbidity data of the clear water layer.

2. The thickener monitoring device according to claim 1, characterized in that, Multiple turbidity sensors (1) of the flocculation layer are evenly spaced along the circumferential direction in the thickening tank (2), and at least some of the turbidity sensors (1) of the flocculation layer are arranged on the same horizontal plane.

3. The thickener monitoring device according to claim 2, characterized in that, The control unit presets a turbidity error value a for the flocculation layer. When the difference between the maximum and minimum values ​​monitored by the multiple turbidity sensors (1) of the flocculation layer is greater than the error value a, the control unit sends a sensor check signal.

4. The thickener monitoring device according to claim 3, characterized in that, The turbidity of the flocculation layer is the average value of the monitoring data of multiple turbidity sensors (1) of the flocculation layer.

5. The thickener monitoring device according to claim 1, characterized in that, Multiple turbidity sensors (3) of the clear water layer are evenly spaced along the circumferential direction in the overflow tank (4), and at least some of the turbidity sensors (3) of the clear water layer are arranged on the same horizontal plane.

6. The thickener monitoring device according to claim 5, characterized in that, The control unit presets a turbidity error value b for the clear water layer. When the difference between the maximum and minimum values ​​monitored by the multiple turbidity sensors (3) of the clear water layer is greater than the error value b, the control unit sends a sensor check signal.

7. The thickener monitoring device according to claim 6, characterized in that, The turbidity of the clear water layer is the average value of the monitoring data of multiple clear water layer turbidity sensors (3).

8. The thickener monitoring device according to claim 1, characterized in that, It also includes a flow stabilizer (5) and a feed pipe (6). The flow stabilizer (5) is located at the center of the thickener (2). One end of the feed pipe (6) is connected to the flow stabilizer (5), and the other end of the feed pipe (6) is connected to the coal slurry water supply equipment. The feed pipe (6) is used to supply coal slurry water to the thickener (2), and the flow stabilizer (5) is used to stabilize the flow field in the thickener (2).

9. The thickener monitoring device according to claim 1, characterized in that, It also includes a stirring rack (7) and a drive unit (8). The stirring rack (7) is connected to the output end of the drive unit (8). The drive unit (8) is used to drive the stirring rack (7) to rotate. The stirring rack (7) is set in the thickening tank (2). The stirring rack (7) is used to mix coal slurry water and flocculant.

10. A method for monitoring a thickener, comprising the thickener monitoring device according to any one of claims 1-9, characterized in that, Includes the following steps: Start monitoring: Start the thickener and monitoring device. Multiple turbidity sensors in the flocculation layer continuously monitor the turbidity of the flocculation layer in the thickener, and multiple turbidity sensors in the clear water layer continuously monitor the turbidity of the clear water layer in the overflow trough at the top of the thickener. The monitored turbidity data is transmitted to the control unit in real time. Dosing control: The control unit receives and processes turbidity data. When the turbidity of the flocculant layer exceeds the preset value, the control unit sends a dosing signal to the dosing system to control the dosing system to adjust the flocculant dosage. Black water detection: After the dosing of chemicals, the control unit continuously receives the turbidity data of the clear water layer monitored by the turbidity sensor of the clear water layer. By comparing the turbidity data with the preset clear water layer detection threshold, it is determined whether black water has occurred in the thickener. If the turbidity data of the clear water layer does not exceed the preset clear water layer judgment threshold, it is determined that no black water has appeared; if it exceeds the threshold, it is determined that black water has appeared and an adjustment warning is issued.

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