Control method of a concentrator, concentrator, medium, and electronic device

Abstract

The present disclosure relates to a control method of a concentrator, the concentrator, a medium and an electronic device. The control method comprises: obtaining a plurality of control parameters of the concentrator; determining whether there is an abnormal control parameter in the plurality of control parameters according to each control parameter and a preset range corresponding to each control parameter; in the case that there is an abnormal control parameter, determining a control priority of an adjustment operation for the abnormal control parameter; and controlling an execution system to perform a corresponding adjustment operation according to the control priority. The present disclosure determines the control priority of the adjustment operation of the abnormal control parameter in the plurality of control parameters, and controls the execution system to perform the corresponding adjustment operation according to the control priority, thereby grading the adjustment operation of the concentrator according to priority, realizing reasonable control of each control parameter within a normal range, avoiding different control modes according to different operators, realizing intelligent operation and unified management of the concentrator, and avoiding errors in manual control.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of water treatment, in particular, to a control method of a thickener, the thickener, a medium and an electronic device. BACKGROUND

[0002] The coal slime water treatment system is one of the important links in the production of a coal washing plant. The coal slime water system mainly plays an important role in recovering coal slime, realizing closed-circuit circulation of washing water, meeting environmental protection requirements, and ensuring desliming and dewatering. The operation status of the coal slime water system is directly related to the normal operation of the coal washing plant. The coal slime water treatment in the coal preparation plant mainly includes three links of classification, thickening and dewatering. The coal slime water classification is mainly realized by relying on the classification cyclone, and the dewatering is mainly realized by filtering and dewatering in the filter press after the high-concentration coal slime water is delayed in the thickening link. The thickening link is mainly completed by using the thickener.

[0003] In the related art, the control logic of the thickener device is different due to different operators, so it is not convenient to manage uniformly, and manual control is prone to errors. SUMMARY

[0004] In order to solve the problems in the related art, the present disclosure provides a control method of a thickener, the thickener, a medium and an electronic device.

[0005] In a first aspect of the present disclosure, a control method of a thickener is provided, comprising:

[0006] obtaining a plurality of control parameters of the thickener;

[0007] determining whether there is an abnormal control parameter in the plurality of control parameters according to each control parameter and a preset range corresponding to each control parameter;

[0008] in the case that the abnormal control parameter exists, determining a control priority of an adjustment operation for the abnormal control parameter;

[0009] controlling an execution system to perform a corresponding adjustment operation according to the control priority.

[0010] Optionally, determining the control priority of the adjustment operation for the abnormal control parameter comprises:

[0011] determining, according to alarm information contained in the adjustment operation of the abnormal control parameter, that the control priority of the adjustment operation corresponding to the alarm information is a first level; and / or,

[0012] in the case that the adjustment operation of the abnormal control parameter does not contain alarm information, determining that the control priority of the adjustment operation corresponding to the abnormal control parameter is a second level, and the first level is greater than the second level.

[0013] Optionally, after determining that the control priority of the adjustment operation corresponding to the abnormal control parameter is the second level, the method comprises:

[0014] determining whether the abnormal control parameter has an associated control parameter;

[0015] if the abnormal control parameter has the associated control parameter, determining that the control priority of the adjustment operation of the abnormal control parameter corresponding to the associated control parameter is a first sub-level; and / or,

[0016] if the abnormal control parameter does not have the associated control parameter, determining that the control priority of the adjustment operation of the abnormal control parameter is a second sub-level, the first sub-level being greater than the second sub-level.

[0017] Optionally, after determining that the control priority of the adjustment operation of the abnormal control parameter is the second sub-level, the method comprises:

[0018] determining that the number of adjustment operations with the control priority being the second sub-level is a plurality;

[0019] controlling the execution system to execute the plurality of adjustment operations.

[0020] Optionally, controlling the execution system to execute the plurality of adjustment operations comprises:

[0021] if there is no same to-be-adjusted parameter in the plurality of adjustment operations, controlling the execution system to execute the plurality of adjustment operations.

[0022] Optionally, the method comprises:

[0023] if there is a same to-be-adjusted parameter in the plurality of adjustment operations, determining whether the adjustment directions of the to-be-adjusted parameters are consistent;

[0024] if the adjustment directions of the to-be-adjusted parameters are consistent, controlling the execution of the plurality of adjustment operations; and / or,

[0025] if the adjustment directions of the to-be-adjusted parameters are inconsistent, controlling the output of an alarm information and adjusting the control priority of the plurality of adjustment operations to the first level.

[0026] Optionally, after controlling the execution system to execute the corresponding adjustment operation according to the control priority, the method comprises:

[0027] obtaining a plurality of target control parameters, the target control parameters comprising control parameters after the execution of adjustment operations;

[0028] determining whether there is an abnormal control parameter in the plurality of target control parameters;

[0029] In the presence of the abnormal control parameter, the step of determining the control priority of the adjustment operation for the abnormal control parameter is performed.

[0030] In a second aspect of the present disclosure, a concentrator is provided, comprising:

[0031] a detection system, a control system and an execution system connected in sequence;

[0032] The detection system is configured to collect a plurality of control parameters in the concentrator.

[0033] The control system is configured to acquire the plurality of control parameters in the concentrator from the detection system, determine whether there is an abnormal control parameter in the plurality of control parameters according to each control parameter and a preset range corresponding to each control parameter, determine the control priority of the adjustment operation for the abnormal control parameter in the presence of the abnormal control parameter, and control the execution system to perform the corresponding adjustment operation according to the control priority.

[0034] In a third aspect of the present disclosure, a computer readable storage medium is provided, which stores computer program instructions, and the program instructions are executed by a first processor to implement the control method of the concentrator according to the first aspect of the present disclosure.

[0035] In a fourth aspect of the present disclosure, an electronic device is provided, comprising:

[0036] at least one second processor; and

[0037] a first memory in communication connection with the at least one second processor; wherein

[0038] The first memory stores instructions executable by the at least one second processor, and the instructions are executed by the at least one second processor to enable the at least one second processor to implement the control method of the concentrator according to the first aspect of the present disclosure when executed.

[0039] The present disclosure determines the control priority of the adjustment operation of the abnormal control parameter in the plurality of control parameters, and controls the execution system to perform the corresponding adjustment operation according to the control priority, thereby grading the adjustment operation of the concentrator according to the priority, realizing reasonable control of each control parameter within a normal range, avoiding different control modes according to different operators, realizing intelligent operation and unified management of the concentrator, and avoiding errors in manual control.

[0040] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and serve to explain the principles of the present disclosure, but are not intended to limit the present disclosure. In the drawings:

[0042] Figure 1 is a flowchart of a control method of a thickener according to an exemplary embodiment.

[0043] Figure 2 is a structural block diagram of a thickener according to an exemplary embodiment.

[0044] Figure 3 is another structural block diagram of a thickener according to an exemplary embodiment. DETAILED DESCRIPTION

[0045] The exemplary embodiments will be described in detail with reference to the accompanying drawings. In the following description, the same drawings refer to the same elements throughout the different drawings. The following exemplary embodiments described in the detailed description section are examples in which the inventive concepts can be practiced. Therefore, it should be understood that many changes to the examples can be made by one skilled in the art without departing from the scope or spirit of the present disclosure.

[0046] In the related art, the working principle of a thickener tank is that, after the material to be thickened is fed into the thickener tank, the particulate matter is settled to the bottom and is discharged from the bottom into a subsequent filter press under the action of the thickener, and the clean water is discharged from the overflow weir for production.

[0047] In the process of settling and thickening of coal slime in the thickener tank, the gravity plays a major role. When the material settles in water, the settling speed is inconsistent due to the influence of water flow and other materials on the particularly small material particles during the settling process, and the settling is disturbed. In particular, the primary coal slime contains part of the gangue, which mainly refers to materials such as montmorillonite and illite. The gangue has small hardness and easy-to-disperse pre-water, and the surface of the material contains polarity. After entering the water, the dispersion is more serious, the particles are smaller, and the settling is more difficult, which reduces the efficiency of the equipment. In order to accelerate the settling speed, improve the production efficiency of the equipment, and reduce the land occupation of the equipment, a coagulant is usually added to the thickener tank to change the surface polarity of the fine particulate material, promote the mutual adsorption of the fine particulate material to form larger particles for easy settling, and add a long molecular chain flocculating agent to further adsorb the fine particulate material to form larger flocs to accelerate the settling of the material in the thickener tank.

[0048] The coal slime can be fully recovered only when the coal slime in the coal slime water is fully settled, and the treated circulating water is in a clear state for the production system to remove slime, remove medium and clean. However, the addition of the reagent cannot be too little or too much. If the addition is too little, the coal slime cannot be fully settled, which can cause the production system of the coal washing plant to be paralyzed. If the addition is too much, the cost of the reagent is increased, and the coal slime is quickly settled, the coal slime at the bottom of the settling tank is compacted, the pressure of the thickener is increased, and the thickener is pressed and raked, which can cause the production of the coal washing plant to be stopped for a long time.

[0049] The following points are required in the actual use of the thickening tank: 1. the coal slime is fully settled to ensure the underflow concentration, 2. the circulating water is clear, 3. the reagent consumption is reduced to the maximum extent, and 4. the concentration of the feed of the coal slime dewatering equipment is ensured while avoiding the thickener from being pressed and raked.

[0050] In order to solve the problem that the control logic of the thickener device is different due to different operators in the related art, and the control mode is not convenient for unified management, the present disclosure realizes the intelligent operation of the thickener by associating the multiple control parameters in the thickener and the thickening tank with data, embedding control programs, and grading the priority of each control program.

[0051] Referring to Figure 1 , Figure 1 is a flow chart of a control method of a thickener according to an example embodiment, as Figure 1 shown, the control method of the thickener includes the following steps.

[0052] S101, multiple control parameters of the thickener are acquired.

[0053] For example, the control parameters are parameters for controlling the normal operation of the thickener, and the values of the multiple control parameters are controlled within a normal range, so as to ensure the normal operation of the thickener. The control parameters include detection parameters and controllable parameters. The detection parameters are parameters obtained by detecting the solution inside the thickener, and the controllable parameters are parameters that can be changed following the adjustment of the detection parameters. It can be understood that the detection parameters can also be controllable elements.

[0054] For example, the control parameters can include the feed concentration, the feed flow, the feed particle size, the underflow concentration, the sediment layer thickness, the overflow concentration, the reagent addition system, the thickener rake frame height, the thickener rake frame torque, the circulating water PH value and the circulating water hardness.

[0055] S102, whether there is an abnormal control parameter in the multiple control parameters is determined according to each control parameter and a preset range corresponding to each control parameter.

[0056] For example, each control parameter corresponds to a preset range. When any control parameter exceeds the preset range corresponding to that control parameter, that control parameter is an abnormal control parameter.

[0057] S103. In the presence of abnormal control parameters, determine the control priority of adjustment operations for the abnormal control parameters.

[0058] For example, if there is only one abnormal control parameter, it is not necessary to determine the control priority of the adjustment operation for the abnormal control parameter; the adjustment operation corresponding to the abnormal control parameter can be executed directly. If there are multiple abnormal control parameters, the adjustment operations for the abnormal control parameters are executed sequentially according to the determined control priority.

[0059] S104. The control execution system performs the corresponding adjustment operation according to the control priority.

[0060] For example, the system performs adjustment operations, such as adding chemicals, adjusting the pH value and hardness of the circulating water. After determining the control priority of the adjustment operations, the system is controlled to perform the adjustment operations according to the control priority, so that the control parameters are within the normal range for the thickener to operate normally.

[0061] This disclosure determines the control priority of adjustment operations for abnormal control parameters among multiple control parameters, and controls the execution system to execute the corresponding adjustment operations according to the control priority. This prioritizes the adjustment operations of the concentrator, enabling reasonable control of each control parameter within the normal range. It eliminates the need for different control methods for different operators, achieving intelligent operation and unified management of the concentrator and avoiding errors caused by manual control.

[0062] In some embodiments, determining the control priority of adjustment operations for abnormal control parameters includes:

[0063] Based on the alarm information included in the adjustment operation of the abnormal control parameters, the control priority of the adjustment operation corresponding to the alarm information is determined to be the first level; and / or,

[0064] If the adjustment operation of the abnormal control parameter does not include alarm information, the control priority of the adjustment operation corresponding to the abnormal control parameter is determined to be the second level, and the first level is greater than the second level.

[0065] For example, the adjustment operation method varies depending on the abnormal control parameter. For instance, the adjustment operation may include outputting an alarm based on the alarm information, adjusting control parameter B according to the abnormal state of control parameter A to bring control parameter A back to the normal range, or adjusting control parameter C when both control parameters A and B are abnormal to bring control parameters A and B back to the normal range.

[0066] In cases where an adjustment operation includes alarm information, the urgency of the adjustment is higher. Therefore, the control priority of the adjustment operation corresponding to the alarm information is set to the first level, thus prioritizing the execution of adjustment operations with alarm information.

[0067] In some embodiments, after determining that the control priority of the adjustment operation corresponding to the abnormal control parameter is the second level, the process includes:

[0068] Determine if any abnormal control parameters are associated with other control parameters;

[0069] If the abnormal control parameter has associated control parameters, the control priority of the adjustment operation of the abnormal control parameter corresponding to the associated control parameter is determined to be the first sub-level; and / or,

[0070] If there are no associated control parameters for the abnormal control parameters, the control priority of the adjustment operation of the abnormal control parameters is determined to be the second sub-level, and the first sub-level is higher than the second sub-level.

[0071] For example, if an abnormal control parameter has associated control parameters, it is determined that the relationship between the abnormal control parameter and the other control parameters needs to be comprehensively considered before performing an adjustment operation. After adjusting the abnormal control parameter with associated control parameters, in addition to checking whether the abnormal control parameter is within the normal range after the adjustment operation, it is also checked whether the control parameters associated with the abnormal control parameter are within the normal range. If the abnormal control parameter does not have associated control parameters, the urgency of adjusting this abnormal control parameter is lower than the urgency of adjusting the abnormal control parameter with associated control parameters. After performing the adjustment operation for the abnormal control parameter with associated control parameters and determining that the abnormal control parameter and its associated control parameters have returned to the normal range, the adjustment operation for the abnormal control parameter with associated control parameters can be performed immediately.

[0072] In some embodiments, after determining that the control priority of the adjustment operation of the abnormal control parameters is the second sub-level, the following is included:

[0073] The number of adjustment operations with the control priority set at the second sub-level is determined to be multiple;

[0074] The control and execution system performs multiple adjustment operations.

[0075] For example, adjustment operations with a control priority of the second sub-level do not contain alarm information, and there are no associated control parameters in the corresponding abnormal control parameters. Therefore, the system can be controlled to execute multiple adjustment operations, saving the overall time of executing adjustment operations and increasing the concentration efficiency of the concentrator.

[0076] In some embodiments, the control execution system performs multiple adjustment operations, including:

[0077] If it is determined that there are no identical parameters to be adjusted among multiple adjustment operations, the control execution system executes multiple adjustment operations.

[0078] For example, the parameter to be adjusted is the control parameter that needs to be adjusted in the adjustment operation so that the abnormal control parameter is adjusted to the normal range after the adjustment operation is performed. Different adjustment operations may have the same parameter to be adjusted, and the adjustment direction of the same parameter in different adjustment operations may be different. When it is further determined that there is no identical parameter to be adjusted in multiple adjustment operations, it is not necessary to consider the adjustment direction of the parameter in different adjustment operations, and the system can be controlled to execute multiple adjustment operations.

[0079] Understandably, adjusting direction refers to two relative adjustment methods, such as increasing or decreasing, rising or falling, moving left or right, etc.

[0080] In some embodiments, the method includes:

[0081] When the same parameter to be adjusted exists in multiple adjustment operations, determine whether the adjustment direction of the parameter to be adjusted is consistent;

[0082] When the adjustment directions of the parameters to be adjusted are consistent, control executes multiple adjustment operations; and / or,

[0083] If the adjustment directions of the parameters to be adjusted are inconsistent, the control output alarm information will be displayed, and the control priority of multiple adjustment operations will be adjusted to the first level.

[0084] For example, the adjustment direction of the same adjustment parameter in different adjustment operations may be different. When the adjustment directions are different, the control logic becomes confused, so an alarm message is output to remind the operator. If the control priority of the adjustment operation that includes the alarm message is first level, then the control priority of multiple adjustment operations can also be adjusted to first level. At this time, since the adjustment directions of the parameters to be adjusted in the multiple adjustment operations are inconsistent, after the multiple adjustment operations output the alarm message, they will no longer execute all adjustment operations corresponding to the parameter to be adjusted, while the other adjustment operations that do not include the parameter to be adjusted can continue to be executed.

[0085] For example, when control parameters A and B are abnormal, the adjustment operation corresponding to control parameter A requires the value of parameter C to increase, while the adjustment operation corresponding to control parameter B requires the value of parameter C to decrease. The adjustment directions of the parameter C to be adjusted in the adjustment operations corresponding to control parameters A and B are opposite, and an alarm message is output to prompt the operator. The operator can judge based on the output alarm message and control the concentrator to execute the correct adjustment method. The operator can also optimize the control logic in the future based on the alarm message.

[0086] This disclosure prioritizes adjustment operations of the execution system to prevent the thickener control system from malfunctioning due to reverse adjustment directions, and records execution records and logic control to facilitate subsequent manual fault analysis.

[0087] In some embodiments, after the control execution system performs the corresponding adjustment operation according to the control priority, it includes:

[0088] Acquire multiple target control parameters, including the control parameters after performing the adjustment operation;

[0089] Determine whether there are any abnormal control parameters among multiple target control parameters;

[0090] In the presence of abnormal control parameters, the procedure is to determine the control priority of the adjustment operation for the abnormal control parameters.

[0091] For example, after the adjustment operation is performed, the multiple adjusted control parameters are re-detected. If there are still abnormal control parameters, the control priority step for adjusting the abnormal control parameters is controlled to continue, so that the execution system can execute the corresponding adjustment operation according to the control priority.

[0092] It is understood that the target control parameters include the control parameters before adjustment and the control parameters after adjustment. The control parameters and target control parameters are continuously detected by the detection system and output to the control system, thereby enabling the control method of the concentrator to be executed.

[0093] The following is an illustrative description of the thickener control method disclosed herein, using specific adjustments to the control parameters as an example. Specifically, the control parameters include feed concentration, feed flow rate, feed particle size, underflow concentration, sediment layer thickness, overflow concentration, dosing regime (including reagent concentration, and the ratio of coagulant and flocculant used), thickener rake height, thickener rake torque, circulating water pH value, and circulating water hardness, etc. Among these:

[0094] (1) The feed concentration and feed flow rate affect the treatment capacity of the thickener. The higher the feed concentration and feed flow rate, the greater the load on the thickener, the greater the amount of dry feed to be treated, the greater the amount of flocculant and coagulant consumed, and the greater the underflow discharge of the thickener. Otherwise, the sedimentation layer thickness will increase, the torque of the thickener rake frame will increase, and even the overflow concentration will increase, resulting in the deterioration of the quality of production water.

[0095] (2) The feed particle size affects the settling speed of the material in the thickener. Usually, the settling of fine particles is a slow process. When the feed particle size increases and the amount of coarse particles increases, the original fine particles will be carried to settle rapidly into the bottom of the thickener, resulting in a high bottom flow concentration, an increased sediment layer thickness, and increased sediment flow resistance, which in turn increases the resistance of the thickener rake frame and may even cause a rake crushing accident.

[0096] (3) The underflow concentration reflects the coal slime thickening effect of the thickener and indirectly reflects the amount of material in the thickener. Generally, to ensure the normal operation of the filter press, the underflow concentration should not be too high or too low. Problems such as excessive thickener dosage and increased feed will result in a high underflow concentration, increased sediment layer thickness, and increased rake torque. Problems such as insufficient thickener dosage and insufficient feed will result in a decreased underflow concentration, decreased sediment layer thickness, and decreased rake torque.

[0097] During the control process, the actual underflow concentration is mainly reflected by the operating conditions of the subsequent coal slime filtration equipment. When the working efficiency of the filter press equipment decreases significantly in the dewatering process, feedback is given to the operators of the thickener.

[0098] (4) The thickness of the sedimentation layer reflects the amount of material in the thickener. A thicker sedimentation layer results in a higher underflow concentration and a higher torque on the thickener's rake frame. Conversely, a thinner sedimentation layer results in a lower underflow concentration and a lower torque on the thickener's rake frame. When the sedimentation layer reaches a certain thickness, the settling area in the thickener disappears, and a large amount of coal slime cannot settle in time and directly enters the overflow, leading to deterioration of the production water and affecting the normal production of the coal preparation plant. At the same time, excessive thickness can also cause problems such as overload of the thickener's rake frame torque. In this case, it is necessary to control the amount of feed, increase the underflow discharge, and control the dosage of chemicals. The amount of chemicals should not be increased directly because the production water turns black, which could cause the coal slime to settle rapidly and lead to a rake-pressing accident.

[0099] (5) Overflow concentration can be used as a measure of the concentration effect of the thickener. The lower the value, the better the water purification and settling effect of the thickener. The main reasons for the increase in overflow concentration are usually unreasonable reagent formulation, overload operation of the thickener (processing capacity is much greater than the design capacity), changes in the settling characteristics of coal slime, and untimely underflow discharge. These factors lead to an increase in the overflow concentration of the thickener, which manifests as blackening of the production water (containing coal slime).

[0100] (6) The dosing regimen has a significant impact on the use of the thickener, and its control is complex and influenced by many factors, including the selection of the dosing point, the concentration of the reagents, and the ratio of coagulant to flocculant. A reasonable dosing regimen can ensure the underflow concentration and overflow concentration, as well as the thickness of the sedimentation layer, and will also affect the torque of the thickener's rake frame. An unreasonable dosing regimen will cause the thickener to operate erratically, resulting in an excessively thick sedimentation layer, increased overflow concentration, increased torque of the thickener's rake frame, and excessively high or low underflow concentration. Excessive flocculant addition can also cause the coal slime to become sticky and deteriorate its filtration characteristics.

[0101] (7) The height of the thickener rake frame is adjustable. When the thickness of the sediment layer in the thickener increases and the torque of the rake frame increases, the rake frame can be raised appropriately to prevent rake crushing accidents and reduce the running resistance of the rake frame. At this time, if it is believed that there is too much material in the thickener, corresponding measures should be taken to reduce the material in the thickener. Setting a rake frame height adjustment device can protect the thickener rake frame to a certain extent and increase the buffer capacity of the thickener.

[0102] (8) The torque of the thickener rake frame reflects the current height of the rake frame and the thickness of the sediment layer in the thickener tank, which indirectly reflects the amount of material in the thickener tank.

[0103] (9) The pH value and hardness of circulating water are mainly applicable to the settling of coal slime with special surface characteristics. Since the surface of coal slime is negatively polar, it leads to mutual repulsion, coal slime dispersion, and increased difficulty in coagulation. The hardness of circulating water can be changed to promote coal slime coagulation and settling. Usually, the pH value and hardness of circulating water are related and determined by the actual characteristics of coal slime.

[0104] Based on the above control parameters, the adjustment operations for these parameters include single-factor control and multi-factor control. Multi-factor control parameters contain correlation information. Both single-factor and multi-factor control include adjustments to output alarm information. It can be understood that, regardless of whether it's single-factor or multi-factor control, any control operation including alarm information adjustment has the highest priority (first level). Other multi-factor controls are at the first sub-level of the second level, and other single-factor controls are at the second sub-level of the second level. A specific example is as follows:

[0105] (1) Single-factor control

[0106] ① The preset ranges for circulating water pH and circulating water hardness are (Imin, Imax) and (Jmin, Jmax), respectively.

[0107] The detection system detects the pH value of the circulating water as I. When I is within (Imin, Imax), the pH value of the circulating water is not adjusted. When I exceeds (Imin, Imax), the adjustment operation includes: controlling the execution system to add pH value adjuster to the thickener and detecting the pH value feedback of the circulating water in real time until the pH value I of the circulating water is within (Imin, Imax).

[0108] The detection system detects the hardness of the circulating water as J. When J is within (Jmin, Jmax), the hardness of the circulating water is not adjusted. When J exceeds (Jmin, Jmax), the adjustment operation includes: controlling the execution system to add water hardness regulator to the thickening tank and detecting the feedback of the circulating water hardness in real time until the hardness J of the circulating water is within (Jmin, Jmax).

[0109] ② The feed concentration and feed flow rate are used together as control parameters for detecting the amount of feed entering the thickener. When the feed amount increases, the amount of dry powder medicine to be added is calculated based on the value of the feed amount entering the thickener, and then the dosage is calculated based on the corresponding drug concentration of the dry powder medicine dosage.

[0110] Meanwhile, there is a correlation between the feed rate entering the thickener and the underflow discharge rate. Different feed rates within a certain range are pre-set to correspond to different underflow discharge rates. The underflow discharge rate is also related to the number of equipment units. In addition, the feed rate is also affected by factors such as the thickness of the sedimentation layer, the height of the thickener rake frame, and the torque of the thickener rake frame.

[0111] Based on the design capacity of the thickener and the processing capacity of the subsequent filter press, a threshold Lmax for the feed rate into the thickener is set. When the detected or calculated feed rate L > Lmax, the adjustment operation includes: outputting an alarm message and controlling the execution system to adjust the raw coal washing rate to reduce the feed rate into the thickener. This adjustment is a step-by-step adjustment; for example, after each adjustment, the thickener continues to run for 30 minutes, and the feed rate is re-detected or calculated for the next adjustment, until the detected or calculated feed rate L ≤ Lmax.

[0112] ③ The concentration threshold within the preset range of overflow concentration is Emax. For example, if the overflow concentration is E, when E≤Emax, no adjustment is performed; when E>Emax, the adjustment operation includes: outputting alarm information and controlling the execution system to increase the drug dosage. This adjustment operation is a step-by-step adjustment, for example, adjusting the overflow concentration by no more than 5% each time, with an interval greater than 30 minutes, until the detected E≤Emax.

[0113] ④The underflow concentration within the preset range (D1, D2) can ensure the efficient operation of the filter press. When the underflow concentration D > D2, the adjustment operations include: outputting an alarm message, controlling the execution system to reduce the chemical dosage and increase the underflow discharge. When the underflow concentration D < D1, the adjustment operations include: controlling the execution system to increase the chemical dosage and reduce the underflow discharge.

[0114] ⑤The sediment layer thickness and the torque of the thickener rake can be used to reflect the amount of accumulated material in the thickener, and the preset ranges are (F1, F2) and (H1, H2) respectively. When either the sediment layer thickness or the torque of the thickener rake exceeds the upper limit value, an alarm is given, indicating that there is too much slime in the thickener. The adjustment operations include: outputting an alarm message, controlling the execution system to raise the position of the thickener rake, reduce the chemical dosage, control the filter press to increase its processing capacity, adjust the underflow discharge to the maximum value, and reduce the washing amount, etc., until the torque of the thickener rake and the sediment layer thickness return to the normal range. When either the sediment layer thickness or the torque of the thickener rake is less than the lower limit value, indicating that there is less slime in the thickener, the adjustment operations include: controlling the execution system to increase the washing amount and reduce the underflow discharge.

[0115] It can be understood that when the above-mentioned control execution system performs adjustment operations, it is affected by multiple control parameters. If the influencing directions are the same, it is executed normally. When the influencing directions are opposite, the adjustment operations include: outputting an alarm message, and the alarm message can include the reason for the alarm and the conflict situation between the adjustment parameters of each control parameter. For example, when the feed rate needs to be increased, it is necessary to control the execution system to increase the chemical dosage. At this time, if the underflow concentration exceeds the preset range and the chemical dosage needs to be reduced, it is considered that the adjustment directions of the two are opposite, and an alarm message is output, and the operator can optimize it in the subsequent multi-factor logical control relationship.

[0116] (2) Multi-factor control

[0117] ①The height of the thickener rake is associated with the sediment layer thickness, the torque of the thickener rake, the underflow concentration, and the feed particle size. Among them, when the feed particle size is within the preset range or exceeds the first threshold value of the preset range, and when any one of the sediment layer thickness, the torque of the thickener rake, and the underflow concentration exceeds the preset range, the thickener rake is lifted, and the execution system is controlled to adjust the chemical dosage. When the feed particle size exceeds the second threshold value of the preset range (the first threshold value is less than the second threshold value), the control priority of the adjustment operation can be adjusted to the first level, the execution system is controlled to raise the height of the thickener rake, and the washing amount of the production system is stopped and the increase of the chemical dosage is stopped.

[0118] ② The amount of washing is related to the thickness of the sedimentation layer, the torque of the thickener rake frame, the underflow concentration, and the amount of feed. When the amount of feed needs to be increased, the control system increases the amount of washing, at which time the thickness of the sedimentation layer, the torque of the thickener rake frame, and the underflow concentration increase. When the amount of feed needs to be reduced, the control system reduces the amount of washing, at which time the thickness of the sedimentation layer, the torque of the thickener rake frame, and the underflow concentration decrease.

[0119] ③ There are many control parameters associated with the underflow discharge. Analysis shows that all control directions are unidirectional, all increasing the underflow discharge, and there is no conflict. Any adjustment operation of any control parameter, including increasing the underflow discharge, can be associated with that control parameter. When there is no adjustment operation including increasing the underflow discharge, the normal underflow discharge can be restored.

[0120] ④ The dosage is related to control parameters such as feed concentration, feed particle size, feed flow rate, underflow concentration, overflow concentration, sedimentation layer thickness, and thickener rake torque. The logical control relationship includes: if any adjustment operation of any of the control parameters (sedimentation layer thickness, thickener rake torque, underflow concentration, or feed particle size) includes an output alarm message, the adjustment operation for that control parameter is executed first; if no output alarm message is provided, the dosage is increased first to ensure the normal operation of the production system. If neither of the above two situations applies, the feed rate is adjusted.

[0121] See Figure 2 , Figure 2 This is a structural block diagram of a concentrator provided according to an exemplary embodiment, such as... Figure 2 A concentrator 100 shown includes:

[0122] The detection system 110, the control system 120, and the execution system 130 are connected in sequence.

[0123] The detection system 110 is used to collect multiple control parameters from the concentrator;

[0124] The control system 120 is used to acquire multiple control parameters of the concentrator from the detection system 110; and determine whether there are abnormal control parameters among the multiple control parameters based on each control parameter and the preset range corresponding to each control parameter; if there are abnormal control parameters, determine the control priority of the adjustment operation for the abnormal control parameters; and the control execution system 130 executes the corresponding adjustment operation according to the control priority.

[0125] In some embodiments, the control system 120 is further configured to:

[0126] Based on the alarm information included in the adjustment operation of the abnormal control parameters, the control priority of the adjustment operation corresponding to the alarm information is determined to be the first level; and / or,

[0127] If the adjustment operation of the abnormal control parameter does not include alarm information, the control priority of the adjustment operation corresponding to the abnormal control parameter is determined to be the second level, and the first level is greater than the second level.

[0128] In some embodiments, the control system 120 is further configured to:

[0129] Determine if any abnormal control parameters are associated with other control parameters;

[0130] If the abnormal control parameter has associated control parameters, the control priority of the adjustment operation of the abnormal control parameter corresponding to the associated control parameter is determined to be the first sub-level; and / or,

[0131] If there are no associated control parameters for the abnormal control parameters, the control priority of the adjustment operation of the abnormal control parameters is determined to be the second sub-level, and the first sub-level is higher than the second sub-level.

[0132] In some embodiments, the control system 120 is further configured to:

[0133] The number of adjustment operations with the control priority set at the second sub-level is determined to be multiple;

[0134] The control and execution system performs multiple adjustment operations.

[0135] In some embodiments, the control system 120 is further configured to:

[0136] If it is determined that there are no identical parameters to be adjusted among multiple adjustment operations, the control execution system executes multiple adjustment operations.

[0137] In some embodiments, the control system 120 is further configured to:

[0138] When the same parameter to be adjusted exists in multiple adjustment operations, determine whether the adjustment direction of the parameter to be adjusted is consistent;

[0139] When the adjustment directions of the parameters to be adjusted are consistent, control executes multiple adjustment operations; and / or,

[0140] If the adjustment directions of the parameters to be adjusted are inconsistent, the control output alarm information will be displayed, and the control priority of multiple adjustment operations will be adjusted to the first level.

[0141] In some embodiments, the control system 120 is further configured to:

[0142] Acquire multiple target control parameters, including the control parameters after performing the adjustment operation;

[0143] Determine whether there are any abnormal control parameters among multiple target control parameters;

[0144] In the presence of abnormal control parameters, the procedure is to determine the control priority of the adjustment operation for the abnormal control parameters.

[0145] Regarding the concentrator 100 in the above embodiments, the specific manner in which the control system performs each operation has been described in detail in the embodiments concerning the control method of the concentrator, and will not be elaborated upon here.

[0146] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a first processor, implement the control method of the condenser according to embodiments of this disclosure.

[0147] This disclosure also provides an electronic device, including:

[0148] At least one second processor; and,

[0149] A first memory communicatively connected to at least one second processor; wherein,

[0150] The first memory stores instructions that can be executed by at least one second processor, which, when executed by at least one second processor, enable the at least one second processor to implement the control method of the condenser according to the embodiments of the present disclosure.

[0151] See Figure 3 , Figure 3 This is a structural block diagram of another concentrator provided according to an exemplary embodiment. (e.g.) Figure 3 As shown, in an exemplary embodiment, the detection system may include a feed concentration detection system 1, a feed particle size detection system 2, a feed flow rate detection system 3, an underflow concentration detection system 4, an overflow concentration detection system 5, a sedimentation layer thickness detection system 6, a thickener rake frame height detection system 7, a thickener rake frame torque detection system 8, a circulating water pH value detection system 9, a circulating water hardness detection system 10, a reagent concentration detection system 11, and a washing volume detection system 12; the execution system includes a thickener rake frame lifting system 13, a circulating water pH value adjustment system 14, a circulating water hardness adjustment system 15, a dosing system 16, a production system 17, a pharmaceutical system 18, and a filter press control system 19.

[0152] For example, the feed concentration detection system 1 may include a commercially available concentration detector installed on the feed pipe of the thickener for detecting the feed concentration.

[0153] For example, the feed particle size detection system 2 may include an online particle size monitor installed on the feed pipe of the thickener to detect the particle size characteristics of the feed material, that is, to detect whether there are large particles in the feed of the thickener. It can predict sudden settling accidents of the thickener and indirectly reflect whether there is a problem of coarse particles in the coal slurry water treatment process of the coal preparation plant.

[0154] For example, the feed flow detection system 3 may include a mains flow meter installed on the feed pipe of the thickener to detect the feed flow rate and work with the feed concentration detection system 1 to monitor the amount of feed L entering the thickener.

[0155] For example, the underflow concentration detection system 4 may include a municipal concentration detector installed on the underflow discharge pipe of the thickener for detecting the underflow concentration.

[0156] For example, the overflow concentration detection system 5 may include a municipal concentration detector installed on the overflow pipe of the thickener for detecting the overflow concentration.

[0157] For example, the sedimentation layer thickness detection system 6 may include an ultrasonic interface instrument, which can detect the thickness of the clear water layer in the thickener by reflecting ultrasonic waves on the sedimentation layer surface. The sedimentation layer thickness is obtained by subtracting the clear water layer thickness from the total height of the thickener, and is used to determine the feed amount in the thickener.

[0158] For example, the thickener rake frame height detection system 7 may include an analog online laser rangefinder, or other devices capable of real-time distance detection such as a rope displacement sensor, installed in the vertical space between the part of the rake frame exposed above the liquid surface and the fixed structural member supporting the thickener. The actual spatial height corresponding to the highest position Gmax and the lowest position Gmin of the thickener rake frame is determined by calibration. The actual height G of the thickener rake frame is determined by relative height with the lowest position Gmin of the rake frame as the zero point.

[0159] For example, the thickener rake frame torque detection system 8 may include a torque sensor installed between the thickener rake frame and the fixed structural component of the thickener tank to detect the resistance encountered during the rotation of the thickener rake frame, i.e., the thickener rake frame torque. Based on the working principle of the thickener rake frame rotation, when using an electric drive, the current of the drive motor can be used as the thickener rake frame torque; when using a hydraulic drive, the pressure of the motor oil pipe in the hydraulic system can be used as the thickener rake frame torque.

[0160] For example, the circulating water pH detection system 9 may include a municipal pH detector, installed on the overflow pipe of the thickener. The specific installation method is determined by the requirements of the pH detector, and it is used to determine the pH value of the circulating water in the thickener.

[0161] For example, the circulating water hardness testing system 10 may include a municipal water hardness testing instrument, which is installed on the overflow pipe of the thickener. The specific installation method is determined by the requirements of the water hardness testing instrument, and is used to determine the hardness of the circulating water in the thickener.

[0162] For example, the reagent concentration detection system 11 may include a commercial concentration detector installed on the dosing pump pipeline for detecting reagent concentration. Depending on actual needs, concentration detectors may be installed separately for coagulants and flocculants.

[0163] For example, the raw coal conveyor belt scale of the coal washing quantity detection system 12 measures the amount of raw coal entering the coal preparation plant. It is installed on the raw coal washing conveyor belt and its main function is to detect the amount of raw coal entering the coal preparation plant.

[0164] For example, the thickener rake frame lifting system 13 may include a hydraulic control system, which controls the vertical extension and retraction of the oil cylinder to drive the thickener rake frame connected to the oil cylinder, thereby realizing the lifting and lowering of the thickener rake frame.

[0165] For example, the circulating water pH adjustment system 14 may include a dry powder feeding device, which controls the circulating water pH adjustment system 14 to add pH adjuster to the thickener to adjust the pH of the circulating water in the thickener.

[0166] During the production process, the pH value of the local water is stable, the settling characteristics of the coal slime are stable, and the pH value of the circulating water needs to be determined based on the test results. Therefore, in practical applications, only one pH value adjuster needs to be added. When the water quality changes significantly, two pH value adjusters can also be used to adjust the pH value of the circulating water.

[0167] For example, the circulating water hardness adjustment system 15 may include a dry powder feeding device and a control system that controls the addition of a water hardness regulator into the thickener to adjust the hardness of the circulating water in the thickener.

[0168] In the production process, the hardness of local water is stable, the settling characteristics of coal slime are stable, and the hardness of circulating water needs to be determined based on test results. Therefore, in practical applications, only one water hardness regulator needs to be added. When the water quality changes significantly, two water hardness regulators can also be used to adjust the hardness of circulating water.

[0169] For example, the dosing system 16 may include a coagulant and flocculant addition system commonly used in coal washing plants, and a corresponding pharmaceutical system 18 may be set up to automatically mix the pharmaceuticals according to the set concentration to obtain the required concentration of pharmaceuticals. The dosing system 16 mainly includes a dosing pump other than the pharmaceutical system. The dosing pump is equipped with a concentration meter and a flow meter, and the frequency of the dosing pump is adjusted by a frequency converter. The start-stop control and monitoring of the dosing pump and the frequency setting are initially determined by the control system according to the corresponding feed rate, and are controlled in combination with the underflow concentration, sediment layer thickness, thickener rake height, thickener rake torque, etc.

[0170] Generally, reagents are divided into two types: coagulants and flocculants. In the early stage, sedimentation tests are conducted based on the settling characteristics of coal slime and the performance of the reagents to obtain a reasonable reagent formulation, that is, the amount of coagulant and flocculant consumed per gram of coal slime feed. The control system calculates the feed amount based on the concentrated feed concentration A and the feed flow rate C, thereby determining the amount of coagulant dry powder and flocculant dry powder to be added. Then, the reagent flow rate is calculated based on the reagent concentration. Finally, the frequency of the dosing pump is adjusted by the control system to ensure that the amount of dry powder of the reagent meets the settling requirements of the feed amount.

[0171] For example, the pharmaceutical system 18 may include an existing automatic dosing system 16 of a coal preparation plant for preparing coagulant and flocculant diluents of different concentrations for controlling the concentration of the reagents.

[0172] For example, production system 17 includes a coal preparation plant separation system. After coal is mined from the mine, it enters the coal preparation plant and undergoes screening, crushing, and separation processes to ultimately obtain marketable coal, gangue, and coal slime products. A large amount of coal slime is generated during the coal preparation plant's production process. This coal slime is ultimately processed in a thickener. There are two main factors affecting the feed rate into the thickener: an increased coal slime yield in the raw coal and an increased raw coal feed rate into the coal preparation plant. The production rate is measured using a raw coal conveyor belt weigher, and the feed rate into the thickener can be controlled based on this production rate.

[0173] For example, a filter press is used to filter the underflow from a thickener to obtain low-moisture coal slime and circulating water. The filter press control system 19 is controlled by a control system to control the operating status of the filter press and thus control the underflow discharge from the thickener.

[0174] For example, the control system may be implemented using a PLC (Programmable Logic Controller) to receive control parameters detected by the detection system, perform algorithm analysis, and thereby control the execution system.

[0175] For example, the control system may include an alarm module and a data statistics module.

[0176] The alarm module includes a human-machine interface, which is used to display the operating status of the concentrator (including the parameters and equipment status of the detection system and execution system) to the operator, as well as to perform data queries and display.

[0177] The data statistics module may include a data storage server, used to statistically analyze, store, and process the various control parameters detected by the detection system, obtaining instantaneous values, cumulative values, and related curves for each parameter. It can also record the operating status of the concentrator, including the triggering and execution of various logical relationships.

[0178] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the control method of the condenser described above when executed by the programmable device.

[0179] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0180] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A control method for a concentrator, characterized in that, include: Obtain multiple control parameters of the concentrator; Based on each of the control parameters and the preset range corresponding to each of the control parameters, it is determined whether there is an abnormal control parameter among the plurality of control parameters. Wherein, when any control parameter exceeds the preset range corresponding to the control parameter, the control parameter is an abnormal control parameter. In the presence of the abnormal control parameters, determine the control priority of the adjustment operation for the abnormal control parameters; The control execution system performs the corresponding adjustment operation according to the control priority; Determine the control priority for adjustment operations on abnormal control parameters, including: Based on the alarm information contained in the adjustment operation of the abnormal control parameters, the control priority of the adjustment operation corresponding to the alarm information is determined to be the first level; If the adjustment operation of the abnormal control parameter does not include alarm information, the control priority of the adjustment operation corresponding to the abnormal control parameter is determined to be the second level, where the first level is greater than the second level. After determining that the control priority of the adjustment operation corresponding to the abnormal control parameter is the second level, the process includes: Determine whether the abnormal control parameter has any associated control parameters; If the abnormal control parameter has the associated control parameter, the control priority of the adjustment operation of the abnormal control parameter corresponding to the associated control parameter is determined to be the first sub-level; If the abnormal control parameter does not have the associated control parameter, the control priority of the adjustment operation of the abnormal control parameter is determined to be the second sub-level, where the first sub-level is greater than the second sub-level. After determining that the control priority of the adjustment operation of the abnormal control parameter is the second sub-level, the following is included: The number of adjustment operations with the control priority set at the second sub-level is determined to be multiple; In cases where the same parameter to be adjusted exists in multiple adjustment operations, determine whether the adjustment direction of the parameter to be adjusted is consistent. When the adjustment directions of the parameters to be adjusted are consistent, the control executes the multiple adjustment operations; If the adjustment directions of the parameters to be adjusted are inconsistent, the control outputs an alarm message and adjusts the control priority of the multiple adjustment operations to the first level. If it is determined that there are no identical parameters to be adjusted among the multiple adjustment operations, the execution system is controlled to execute the multiple adjustment operations.

2. The control method according to claim 1, characterized in that, After the control execution system performs the corresponding adjustment operation according to the control priority, it includes: Acquire multiple target control parameters, including control parameters after performing adjustment operations; Determine whether there are any abnormal control parameters among the plurality of target control parameters; In the presence of the abnormal control parameters, the step of determining the control priority of the adjustment operation for the abnormal control parameters is performed.

3. A concentrator, characterized in that, include: The detection system, control system, and execution system are connected in sequence. The detection system is used to collect multiple control parameters from the concentrator; The control system is used to acquire multiple control parameters of the concentrator from the detection system; Based on each control parameter and its corresponding preset range, it is determined whether there are any abnormal control parameters among the plurality of control parameters. Specifically, if any control parameter exceeds its corresponding preset range, that control parameter is considered an abnormal control parameter. If an abnormal control parameter exists, a control priority for the adjustment operation targeting that abnormal control parameter is determined. The execution system is then controlled to perform the corresponding adjustment operation according to the control priority. Determine the control priority for adjustment operations on abnormal control parameters, including: Based on the alarm information contained in the adjustment operation of the abnormal control parameters, the control priority of the adjustment operation corresponding to the alarm information is determined to be the first level; If the adjustment operation of the abnormal control parameter does not include alarm information, the control priority of the adjustment operation corresponding to the abnormal control parameter is determined to be the second level, where the first level is greater than the second level. After determining that the control priority of the adjustment operation corresponding to the abnormal control parameter is the second level, the process includes: Determine whether the abnormal control parameter has any associated control parameters; If the abnormal control parameter has the associated control parameter, the control priority of the adjustment operation of the abnormal control parameter corresponding to the associated control parameter is determined to be the first sub-level; If the abnormal control parameter does not have the associated control parameter, the control priority of the adjustment operation of the abnormal control parameter is determined to be the second sub-level, where the first sub-level is greater than the second sub-level. After determining that the control priority of the adjustment operation of the abnormal control parameter is the second sub-level, the following is included: The number of adjustment operations with the control priority set at the second sub-level is determined to be multiple; In cases where the same parameter to be adjusted exists in multiple adjustment operations, determine whether the adjustment direction of the parameter to be adjusted is consistent. When the adjustment directions of the parameters to be adjusted are consistent, the control executes the multiple adjustment operations; If the adjustment directions of the parameters to be adjusted are inconsistent, the control outputs an alarm message and adjusts the control priority of the multiple adjustment operations to the first level. If it is determined that there are no identical parameters to be adjusted among the multiple adjustment operations, the execution system is controlled to execute the multiple adjustment operations.

4. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the program instructions are executed by the first processor, they implement the control method of the concentrator as described in any one of claims 1-2.

5. An electronic device, characterized in that, include: At least one second processor; as well as, A first memory communicatively connected to the at least one second processor; wherein, The first memory stores instructions that can be executed by the at least one second processor to enable the at least one second processor to implement the control method of the concentrator according to any one of claims 1-2.

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