Method and device for adding filter aid for coal dressing based on unmanned operation

Abstract

The invention relates to the technical field of coal preparation plant slime water treatment, and discloses a coal preparation filter aid adding method and device based on unmanned operation, and the device comprises a filter aid concentrated liquid machine, a filter aid dosing machine and a control system. The filter aid concentrated liquid machine is used for preparing high-concentration liquid medicine in a centralized manner, and an outlet of the filter aid concentrated liquid machine is connected with the filter aid dosing machine through a pipeline provided with a metering pump and a flowmeter. The control system controls the proportion of the concentrated liquid conveying amount to the dilution clear water injection amount according to a set concentration and volume expansion coefficient model, and online precise dilution supply is automatically completed when the liquid level of the dosing machine is low. And the filter aid dosing machine pumps the diluted liquid medicine to a slime water system, and the operation frequency of the metering pump is increased along with the increase of the adding amount of the flocculating agent. According to the invention, unmanned closed-loop control of the whole process of adding the filter aid is realized, the liquid preparation concentration precision is improved, and a low-viscosity environment required by sedimentation of a slime water system is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal slime water treatment in coal preparation plant, in particular to a filter aid adding method and device for coal preparation based on unmanned operation. BACKGROUND

[0002] In the washing and separation process of coal preparation plant, coal slime water treatment is a crucial link, which directly affects the closed-circuit circulation of washing water and the quality of clean coal products. In order to accelerate the sedimentation of coal slime particles and improve the pressure filtration dewatering effect, it is usually necessary to add flocculants and filter aids in the coal slime water system. Among them, the filter aid is mainly used to reduce the viscosity of the coal slime water and to build a suitable fluid environment for flocculation and sedimentation, and the accuracy of its preparation concentration and dosage has a significant impact on the treatment effect.

[0003] The existing filter aid adding method mostly adopts manual preparation or semi-automatic simple device. In the preparation of liquid medicine, the conventional equipment often ignores the volume effect caused by the change of physical properties in the process of solute dissolution and dilution of high-concentration liquid, lacks compensation calculation of the volume expansion coefficient difference between concentrated liquid and dilute liquid, and only mixes according to the simple volume or mass ratio, resulting in a large deviation between the actual concentration of the final liquid medicine and the theoretical target value, affecting the performance of the medicine.

[0004] In addition, the traditional dosing system has low automation degree in operation management, and the processes of medicine replenishment, dilution and transportation are fragmented, which seriously depends on manual inspection of liquid level and manual operation. This mode not only has high labor intensity, but also is prone to cause overflow or material interruption of the dosing machine due to human negligence, and it is difficult to realize continuous and stable unmanned operation. At the same time, in the control strategy of dosage, the existing device usually adopts fixed frequency or open loop control based on flow, and fails to establish a linkage mechanism between the dosage of filter aid and the dosage of flocculant. When the flocculant dosage is adjusted due to the fluctuation of coal slime water properties, the filter aid cannot be automatically adjusted, which causes the viscosity environment in the coal slime water system to be unable to maintain in the best state, thereby reducing the sedimentation efficiency and increasing the medicine consumption cost. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a filter aid adding method and device for coal preparation based on unmanned operation, which solves the problems of inaccurate liquid concentration caused by ignoring the volume expansion effect, low automation degree and difficulty in realizing unmanned operation, and lack of linkage adjustment of dosage with flocculant in the existing filter aid adding device for coal preparation, which affects the coal slime water sedimentation effect and medicine utilization rate.

[0006] In order to achieve the above object, the application is implemented by the following technical solutions: A filter aid adding method for coal preparation based on unmanned operation, which is based on a filter aid adding device, wherein the device comprises a filter aid thick liquid machine and a filter aid dosing machine; the method comprises the following steps: S1, thick liquid preparation: a certain amount of filter aid is manually put into the filter aid dosing opening of the filter aid thick liquid barrel, and the control system automatically opens the filter aid thick liquid clean water electric control valve according to the set thick liquid concentration and volume expansion coefficient, measures the corresponding amount of clean water through the filter aid thick liquid clean water flow meter, and opens the filter aid thick liquid stirring device to prepare the filter aid thick liquid; S2, liquid level monitoring and automatic replenishment: the filter aid dosing machine barrel level meter is used to monitor the liquid level in the filter aid dosing machine barrel in real time; when the liquid level is in a low liquid level state, the control system automatically enters the replenishment mode, starts the filter aid thick liquid metering pump to deliver the filter aid thick liquid to the filter aid dosing machine barrel, and simultaneously opens the filter aid dosing machine clean water electric control valve for online dilution; S3, dilution flow control: during the replenishment process, the control system automatically adjusts the opening degree of the filter aid dosing machine clean water electric control valve according to the flow data fed back by the filter aid thick liquid flow meter, combines the set dilution liquid concentration target value and the volume expansion coefficient of the filter aid at different concentrations, and makes the clean water flow measured by the filter aid dosing machine clean water flow meter reach the flow value calculated based on the set concentration; S4, automatic dosing: the filter aid dosing machine metering pump continuously operates, and the diluted liquid in the filter aid dosing machine barrel is delivered to the coal slime water system after being measured by the filter aid dosing machine flow meter; S5, replenishment termination: when the filter aid dosing machine barrel level meter monitors that the liquid level reaches a high liquid level state, the filter aid thick liquid metering pump is automatically stopped and the filter aid dosing machine clean water electric control valve is closed.

[0007] Preferably, in step S1, the amount of clean water added during the preparation of the thick liquid is calculated based on the mass of the medicament, the set mass-volume concentration of the thick liquid and the volume expansion coefficient of the solution at this concentration; the control system automatically closes the filter aid thick liquid clean water electric control valve by integrating the flow of clean water when the cumulative water amount reaches the calculated value.

[0008] Preferably, in step S3, the specific dilution flow control is that the control system takes the mass of the medicament in the dilution liquid equal to the mass of the medicament in the delivered thick liquid as the control target, calculates the required clean water flow, and the calculation process includes compensation operation of the difference between the volume expansion coefficient corresponding to the thick liquid concentration and the volume expansion coefficient corresponding to the dilution liquid concentration.

[0009] Preferably, in step S2, the filter aid dosing machine barrel level meter is set with three detection points of low liquid level, medium liquid level and high liquid level; wherein the low liquid level is used to trigger the start of thick liquid supplement and water dilution, the high liquid level is used to trigger the stop of supplement, and the medium liquid level is used to indicate the liquid level.

[0010] Preferably, in step S4, the operating frequency of the filter aid dosing machine metering pump is associated with the amount of flocculant added in the slime water system, and increases with the increase of the amount of flocculant, so as to maintain the low viscosity environment required for slime water sedimentation.

[0011] A filter aid adding device for coal preparation based on unmanned operation, comprising a filter aid thick liquid machine, a filter aid dosing machine and a control system. The filter aid thick liquid machine comprises a filter aid thick liquid barrel, a filter aid dosing port and a filter aid thick liquid stirring device are arranged above the filter aid thick liquid barrel, and a filter aid thick liquid barrel level meter is installed; the filter aid thick liquid barrel is connected with a thick liquid preparation clean water pipeline, and a filter aid thick liquid clean water electric control valve and a filter aid thick liquid clean water flow meter are arranged in series on the pipeline. The filter aid thick liquid barrel is connected with the filter aid dosing machine through a thick liquid conveying pipeline, and a filter aid thick liquid metering pump and a filter aid thick liquid flow meter are arranged on the thick liquid conveying pipeline. The filter aid dosing machine comprises a filter aid dosing machine barrel, a filter aid dosing machine stirring device and a filter aid dosing machine barrel level meter are arranged on the filter aid dosing machine barrel; a dilution clean water pipeline is connected to the filter aid dosing machine barrel, and a filter aid dosing machine clean water flow meter and a filter aid dosing machine clean water electric control valve are arranged in series on the pipeline; a dosing pipeline is connected to the bottom of the filter aid dosing machine barrel, and a filter aid dosing machine metering pump and a filter aid dosing machine flow meter are arranged on the pipeline. The control system is electrically connected with the filter aid thick liquid clean water electric control valve, the filter aid thick liquid clean water flow meter, the filter aid thick liquid stirring device, the filter aid thick liquid barrel level meter, the filter aid thick liquid metering pump, the filter aid thick liquid flow meter, the filter aid dosing machine stirring device, the filter aid dosing machine clean water flow meter, the filter aid dosing machine clean water electric control valve, the filter aid dosing machine barrel level meter, the filter aid dosing machine metering pump and the filter aid dosing machine flow meter, respectively, for performing logical operation and automatic control.

[0012] Preferably, the filter aid thick liquid machine comprises a filter aid thick liquid barrel, a filter aid dosing port and a filter aid thick liquid stirring device are arranged above the filter aid thick liquid barrel, and a filter aid thick liquid barrel level meter is installed; The filter aid thick liquid barrel is connected with a thick liquid preparation clean water pipeline, and a filter aid thick liquid clean water electric control valve and a filter aid thick liquid clean water flow meter are arranged in series on the pipeline.

[0013] Preferably, a concentrated liquid delivery pipeline is provided between the filter aid concentrate machine and the filter aid dosing machine, and a filter aid concentrated liquid metering pump and a filter aid concentrated liquid flow meter are provided on the concentrated liquid delivery pipeline; the input end of the filter aid concentrated liquid metering pump is connected to the bottom of the filter aid concentrated liquid tank, and the output end extends to the filter aid dosing machine.

[0014] Preferably, the filter aid dosing machine includes a filter aid dosing machine tank body, and the filter aid dosing machine tank body is equipped with a filter aid dosing machine stirring device and a filter aid dosing machine tank body level gauge; The filter aid dosing machine tank is connected to a dilution water pipeline, which is equipped with a filter aid dosing machine water electrical control valve and a filter aid dosing machine water flow meter connected in series. The bottom of the filter aid dosing machine tank is connected to a dosing pipeline, which is equipped with a filter aid dosing machine metering pump and a filter aid dosing machine flow meter.

[0015] Preferably, the effective volume of the filter aid concentrate tank is configured according to the solubility of the filter aid at a set temperature and the preset continuous production and use cycle; the feed end of both the filter aid concentrate metering pump and the filter aid dosing machine metering pump is equipped with a filter device to prevent impurities from entering the pump body.

[0016] Working principle: This invention coordinates the concentrate dispenser and the dosing machine through a control system. First, it automatically injects water into the manually added agent according to the set concentration and volume expansion coefficient to prepare the concentrate. During the production process, the liquid level of the dosing machine is monitored in real time. When the liquid level is low, the replenishment is automatically started. Using flow feedback combined with the volume expansion coefficient compensation algorithm, the ratio of concentrate delivery and clean water injection is dynamically adjusted to achieve precise online dilution. The diluted solution is added by a metering pump according to the flocculant dosage of the coal slurry water system through frequency conversion linkage. The replenishment is automatically stopped when the liquid level is high, thereby realizing precise and unmanned closed-loop operation of the entire process of filter aid preparation, storage, dilution and addition.

[0017] This invention provides a method and apparatus for adding filter aids in coal preparation based on unmanned operation. It has the following beneficial effects: 1. This invention employs a compensation algorithm based on the volume expansion coefficient for batch control. During the preparation of concentrated solution and online dilution, the control system accurately calculates the amount of clean water added based on the set mass volume concentration and physical model, effectively offsetting the volume change caused by non-ideal solution properties during solute dissolution and solution mixing. Combined with the real-time integral feedback of pipeline flow rate by the flow meter, the accuracy of the ratio of filter aid solution at each stage is significantly improved, ensuring that the final reagent concentration entering the coal slurry water system strictly meets the process requirements, avoiding concentration fluctuations caused by traditional manual experience estimation.

[0018] 2. This invention realizes unmanned closed-loop operation of the entire filter aid addition process. By setting up a large-capacity concentrate dispenser and a dosing machine with liquid level detection function, a graded operation mode of centralized one-time preparation and online automatic replenishment is constructed. The low liquid level and high liquid level signals of the dosing machine tank automatically trigger or terminate the concentrate delivery and water dilution process. While ensuring a continuous supply of the drug solution, a single dosing can meet the needs of long-term continuous production, which greatly reduces the labor intensity of on-site workers and the risk of exposure to chemical agents.

[0019] 3. This invention establishes a linkage control mechanism between the dosage of filter aid and the dosage of flocculant. The control system linearly adjusts the operating frequency of the filter aid dosing pump according to the real-time addition of flocculant in the coal slurry water treatment system. This dynamic following adjustment ensures that the filter aid can match the working conditions of the flocculant in real time, and always maintains the coal slurry water system in a low viscosity environment suitable for settling. This optimizes the bridging and capture efficiency of the flocculant and ensures the settling speed of the clean coal slurry and the effect of subsequent pressure filtration and dewatering under the condition of coal quality fluctuation. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a rear view of the present invention.

[0021] The components include: 1. Filter aid concentrate tank; 2. Filter aid inlet; 3. Filter aid concentrate clean water electrically controlled valve; 4. Filter aid concentrate clean water flow meter; 5. Filter aid concentrate stirring device; 6. Filter aid concentrate tank level gauge; 7. Filter aid concentrate metering pump; 8. Filter aid concentrate flow meter; 9. Filter aid dosing machine stirring device; 10. Filter aid dosing machine clean water flow meter; 11. Filter aid dosing machine clean water electrically controlled valve; 12. Filter aid dosing machine tank level gauge; 13. Filter aid dosing machine tank; 14. Filter aid dosing machine metering pump; and 15. Filter aid dosing machine flow meter. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example: Please see the appendix Figure 1 Appendix Figure 2This invention provides a method for adding filter aids for coal preparation based on unmanned operation. The method utilizes a filter aid adding device, which includes a filter aid concentrate dispenser and a filter aid dosing machine. The method includes the following steps: S1. Preparation of concentrated solution: The set amount of filter aid is manually added to the filter aid dosing port 2 of the filter aid concentrated solution tank 1. The control system automatically opens the filter aid concentrated solution water control valve 3 according to the set concentrated solution concentration and volume expansion coefficient. The corresponding amount of water is added through the filter aid concentrated solution water flow meter 4, and the filter aid concentrated solution stirring device 5 is turned on to prepare the filter aid concentrated solution. S2. Liquid level monitoring and automatic replenishment: The liquid level in the filter aid dosing machine tank 13 is monitored in real time by the material level gauge 12 in the filter aid dosing machine tank. When the liquid level is low, the control system automatically enters the replenishment mode, starts the filter aid concentrate metering pump 7 to deliver the filter aid concentrate to the filter aid dosing machine tank 13, and at the same time opens the filter aid dosing machine clean water electric control valve 11 for online dilution. S3. Dilution Flow Control: During the replenishment process, the control system automatically adjusts the opening of the filter aid dosing machine's clean water electric control valve 11 based on the flow data fed back by the filter aid concentrate flow meter 8, combined with the set target value of the diluent concentration and the volume expansion coefficient of the filter aid at different concentrations, so that the clean water flow measured by the filter aid dosing machine's clean water flow meter 10 reaches the flow value calculated based on the set concentration. S4. Automatic dosing: The metering pump 14 of the filter aid dosing machine runs continuously, and the diluted solution in the filter aid dosing machine tank 13 is metered by the filter aid dosing machine flow meter 15 and then transported to the coal slurry water system. S5. Replenishment Termination: When the level gauge 12 of the filter aid dosing machine tank detects that the liquid level has reached a high level, the filter aid concentrate metering pump 7 will be automatically stopped and the filter aid dosing machine clean water electrical control valve 11 will be closed.

[0024] The filter aid concentrate tank 1 is used to store the prepared high-concentration filter aid solution, thereby meeting the continuous consumption needs in the subsequent production process and reducing the number of dosing operations. The filter aid dosing port 2 serves as a channel for dosing the agent, facilitating centralized manual feeding. The filter aid concentrate water control valve 3, in conjunction with the filter aid concentrate water flow meter 4, provides precise water injection control. The filter aid concentrate water flow meter 4 measures the volume of water entering the tank, ensuring the accuracy of the concentrate ratio. The filter aid concentrate stirring device 5 is used to forcibly stir the water and agent powder in the tank, thereby accelerating agent dissolution, preventing agent precipitation, and ensuring uniform concentrate concentration. The filter aid dosing machine tank level gauge 12 provides real-time liquid level signal feedback, serving as the basis for judging the start, stop, and replenishment process of the control system. The filter aid dosing machine tank 13 stores the diluted filter aid solution, thus acting as a buffer container to ensure continuous supply of the agent to the coal slurry water system. The filter aid concentrate metering pump 7 is used for... The system provides power to quantitatively transport the concentrated liquid from the concentrate tank to the dosing machine tank, thereby achieving automatic transfer of the chemicals. The filter aid dosing machine's clean water electrical control valve 11 controls the on / off state and flow rate of the diluted clean water, enabling automatic online preparation of the chemicals. The filter aid concentrate flow meter 8 accurately measures the instantaneous flow rate of the concentrated liquid in the delivery pipeline, providing data support for the control system to calculate the required amount of clean water. The filter aid dosing machine's clean water flow meter 10 monitors the actual flow rate of the diluted clean water in real time, forming a closed-loop control to ensure that the concentration of the diluted solution meets process requirements. The filter aid dosing machine's metering pump 14 continuously pumps the diluted solution to the application end, maintaining the stable operation of the coal slurry water treatment system. The filter aid dosing machine's flow meter 15 tracks the actual amount of solution consumed, facilitating production data monitoring and cost accounting. The filter aid dosing machine's clean water electrical control valve 11 prevents overflow from the filter aid dosing machine tank 13, avoiding chemical waste and environmental pollution.

[0025] Please see the appendix Figure 1 Appendix Figure 2 In step S1, the amount of water added during the preparation of the concentrate is calculated based on the mass of the reagent, the set mass volume concentration of the concentrate, and the volume expansion coefficient of the solution at that concentration. The control system automatically closes the filter aid concentrate water control valve 3 when the cumulative water volume reaches the calculated value by performing an integral calculation on the flow rate of the water.

[0026] The control system is designed to perform calculations based on input parameters and a preset physical model to accurately determine the required volume of clean water, avoiding concentration deviations caused by neglecting volume expansion effects and ensuring the scientific accuracy of concentrated solution preparation. The control system performs integral calculations on the clean water flow rate. During this process, the filter aid concentrate and clean water flow meter 4 interact with the control system to provide real-time feedback on the instantaneous flow rate in the pipeline, supporting real-time calculation of the cumulative amount and achieving digital monitoring of the water injection process. The filter aid concentrate and clean water electrically controlled valve 3 is used to perform a shut-off action to cut off the water supply pipeline, stopping water addition the instant the water volume reaches the target, ensuring the accuracy of the concentrated solution ratio, avoiding human error, and improving preparation efficiency.

[0027] Please see the appendix Figure 1 Appendix Figure 2 In step S3, the dilution flow control specifically involves the control system taking the mass of the agent in the diluent as equal to the mass of the agent in the delivered concentrate as the control objective, calculating the required clean water flow rate. This calculation process includes compensation calculations for the difference between the volume expansion coefficient corresponding to the concentration of the concentrate and the volume expansion coefficient corresponding to the concentration of the diluent.

[0028] The control system is designed to run a preset mass conservation algorithm, acting as the brain of the entire dilution process, coordinating various sensors and actuators to achieve intelligent proportioning control. During this process, the filter aid concentrate flow meter 8 is used to measure the volume of concentrate entering the mixing system in real time, thus providing the control system with the key input variables required for calculation and ensuring the accuracy of mass conversion. The filter aid dosing machine's clean water electrically controlled valve 11 is used to dynamically adjust the valve opening based on the results of the compensation calculation, thereby precisely controlling the injection speed of the dilution water, offsetting the effects of volume expansion, and ensuring the stability of various indicators of the filter aid diluent.

[0029] Please see the appendix Figure 1 Appendix Figure 2 In step S2, the filter aid dosing machine tank level gauge 12 is set with three detection points: low liquid level, medium liquid level and high liquid level; the low liquid level is used to trigger the start of concentrated liquid replenishment and water dilution, the high liquid level is used to trigger the stop of replenishment, and the medium liquid level is used for liquid level indication.

[0030] The filter aid dosing machine tank level gauge 12 is used to sense the changes in liquid level inside the filter aid dosing machine tank 13 in real time, thereby converting the physical quantity of liquid level into an electrical signal and feeding it back to the control system to provide a basis for judgment of the automated control logic. The low liquid level is used to trigger the start of concentrated liquid replenishment and water dilution, thus serving as a bottom line to prevent the pump from running dry and the liquid from being interrupted, ensuring the continuity of the dosing operation. The high liquid level is used to trigger the stop of replenishment, thus serving as an upper limit protection to prevent liquid overflow, avoiding material waste and on-site environmental pollution. The medium liquid level is used for liquid level indication, thus serving as a visual reference for the normal operating range, making it easy for inspection personnel to confirm that the equipment is in a stable operating range without extreme conditions.

[0031] Please see the appendix Figure 1 Appendix Figure 2 In step S4, the operating frequency of the filter aid dosing metering pump 14 is related to the amount of flocculant added in the coal slurry water system, and increases with the increase of flocculant dosage to maintain the low viscosity environment required for coal slurry water settling.

[0032] The filter aid dosing metering pump 14 is used to receive frequency conversion control signals and quantitatively deliver the diluted solution into the pipeline, thereby achieving continuous and precise dosing of the agent. The control system works in conjunction with the filter aid dosing metering pump 14 to automatically adjust the dosing ratio of the filter aid according to the change in the flocculant dosage, thereby achieving the effect of synergistic operation of the two agents. It maintains the low viscosity environment required for coal slurry water settling, thereby reducing the viscosity of the coal slurry water to accelerate the settling speed, optimizing the subsequent pressure filtration and dewatering process conditions, and ensuring the quality of the clean coal slurry.

[0033] Please see the appendix Figure 1 Appendix Figure 2 A filter aid addition device for coal preparation based on unmanned operation includes a filter aid concentrate machine, a filter aid dosing machine, and a control system; The filter aid concentrate machine includes a filter aid concentrate tank 1, with a filter aid dosing port 2 and a filter aid concentrate stirring device 5 above the filter aid concentrate tank 1, and a filter aid concentrate tank level gauge 6 installed; the filter aid concentrate tank 1 is connected to a concentrate preparation water pipeline, which is equipped with a filter aid concentrate water electrically controlled valve 3 and a filter aid concentrate water flow meter 4 connected in series; The filter aid concentrate tank 1 is connected to the filter aid dosing machine through a concentrate delivery pipeline, which is equipped with a filter aid concentrate metering pump 7 and a filter aid concentrate flow meter 8. The filter aid dosing machine includes a filter aid dosing machine tank 13, on which a filter aid dosing machine stirring device 9 and a filter aid dosing machine tank level gauge 12 are installed; the filter aid dosing machine tank 13 is connected to a dilution water pipeline, on which a filter aid dosing machine water flow meter 10 and a filter aid dosing machine water electrically controlled valve 11 are installed in series; the bottom of the filter aid dosing machine tank 13 is connected to a dosing pipeline, on which a filter aid dosing machine metering pump 14 and a filter aid dosing machine flow meter 15 are installed; The control system is electrically connected to the filter aid concentrate and clean water electric control valve 3, the filter aid concentrate and clean water flow meter 4, the filter aid concentrate stirring device 5, the filter aid concentrate tank level gauge 6, the filter aid concentrate metering pump 7, the filter aid concentrate flow meter 8, the filter aid dosing machine stirring device 9, the filter aid dosing machine clean water flow meter 10, the filter aid dosing machine clean water electric control valve 11, the filter aid dosing machine tank level gauge 12, the filter aid dosing machine metering pump 14, and the filter aid dosing machine flow meter 15, respectively, and is used to perform logic operations and automatic control.

[0034] The filter aid concentrate preparation machine is used for centralized preparation of high-concentration solutions, thereby enabling batch preparation of the reagents and reducing the frequency of manual feeding. The filter aid dosing machine is used for online dilution and dosing of the concentrate, thus meeting the continuous demand for low-concentration solutions in the coal slurry water treatment process. The control system coordinates the automated operation of various devices, thereby replacing manual on-site operation and realizing unmanned management of the dosing process. The filter aid concentrate tank 1 serves as the main reaction and storage container, providing space for the full dissolution of the reagents and ensuring the reserve of concentrate. The filter aid concentrate stirring device 5 works in conjunction with the filter aid concentrate tank 1 to perform stirring operations, achieving the effects of preventing reagent agglomeration and accelerating dissolution. Its outlet is connected to the filter aid dosing machine through a pipeline. The filter aid concentrate metering pump 7 is installed on the pipeline to provide fluid transportation. The power source allows for the quantitative transfer of the prepared concentrated solution to the next stage of equipment, achieving automatic material replenishment. The filter aid dosing machine tank 13 receives the concentrated solution and clean water, providing a mixing space and acting as a buffer tank to balance the flow difference between concentrated solution replenishment and diluent addition. The filter aid dosing machine stirring device 9 continuously stirs the mixture in the tank, ensuring uniform concentration of the diluted solution and avoiding excessively high or low concentrations in certain areas. The filter aid dosing machine metering pump 14 accurately pumps the diluent to the process point, stabilizing the dosage and optimizing the coal slime settling effect. The control system collects sensor signals from the flow meter and level gauge and controls the actions of the pump and valves, thus constructing a closed-loop control circuit. This achieves the effect of automatically adjusting the preparation and dosing parameters of the agent according to production needs, improving the system's response speed and control accuracy.

[0035] Please see the appendix Figure 1 Appendix Figure 2The filter aid concentrate machine includes a filter aid concentrate tank 1, a filter aid dosing port 2 and a filter aid concentrate stirring device 5 are provided on the top of the filter aid concentrate tank 1, and a filter aid concentrate tank level gauge 6 is installed. The filter aid concentrate tank 1 is connected to a concentrate preparation water pipeline, which is equipped with a filter aid concentrate water control valve 3 and a filter aid concentrate water flow meter 4 connected in series.

[0036] The filter aid concentrate tank 1 is designed to hold the dissolved high-concentration filter aid, providing storage space for a production mode of one-shift preparation and two-shift use, reducing the frequency of preparation. The filter aid dosing port 2 serves as a dedicated inlet for manual addition of solid agents, facilitating centralized feeding and standardizing the work process. The filter aid concentrate stirring device 5 works in conjunction with the filter aid concentrate tank 1 to rotate and stir, accelerating agent dissolution, preventing solid particle sedimentation, and ensuring the uniformity of the concentrate concentration. The filter aid concentrate tank level gauge 6 monitors the liquid level changes in the tank in real time, providing data feedback to the control system and preventing overflow or equipment idling caused by abnormal liquid levels. The filter aid concentrate clear water electrically controlled valve 3 automatically opens or shuts off the water supply according to control commands, automating the water injection process. The filter aid concentrate clear water flow meter 4 works in conjunction with the filter aid concentrate clear water electrically controlled valve 3 to monitor the flow rate, accurately measuring the volume of clear water injected into the tank, achieving precise control of the agent ratio and ensuring the stability of the concentrate quality.

[0037] Please see the appendix Figure 1 Appendix Figure 2 A concentrated liquid delivery pipeline is provided between the filter aid concentrate machine and the filter aid dosing machine. The concentrated liquid delivery pipeline is equipped with a filter aid concentrated liquid metering pump 7 and a filter aid concentrated liquid flow meter 8. The input end of the filter aid concentrated liquid metering pump 7 is connected to the bottom of the filter aid concentrated liquid tank 1, and the output end extends to the filter aid dosing machine.

[0038] The set-up concentrated liquid delivery pipeline is used to establish a physical connection channel from the preparation unit to the dosing unit, thereby realizing the closed delivery of the filter aid concentrate and avoiding possible contamination or leakage of the liquid due to open transfer. The filter aid concentrate metering pump 7 is used to provide the power required for fluid delivery, thereby overcoming pipeline resistance to quantitatively extract high-concentration liquid and realizing automatic replenishment of the agent. The filter aid concentrate flow meter 8 works in conjunction with the filter aid concentrate metering pump 7 to carry out the delivery operation, and is used to monitor the concentrated liquid flow data through the pipeline in real time, achieving the effect of providing accurate input variables for the dilution ratio calculation of the control system, ensuring the concentration accuracy of the subsequent dilution process. The input end of the filter aid concentrate metering pump 7 is connected to the bottom of the filter aid concentrate tank 1. This connection structure is used to use the self-weight pressure of the liquid to assist the pump body to draw in, thereby effectively preventing cavitation of the pump and ensuring the stability of pumping. The output end extends to the filter aid dosing machine, thereby guiding the concentrate into the dilution container, completing the interstage transfer of the agent.

[0039] Please see the appendix Figure 1 Appendix Figure 2 The filter aid dosing machine includes a filter aid dosing machine tank 13, and the filter aid dosing machine tank 13 is equipped with a filter aid dosing machine stirring device 9 and a filter aid dosing machine tank level gauge 12; The filter aid dosing machine tank 13 is connected to a dilution water pipeline, which is equipped with a filter aid dosing machine water control valve 11 and a filter aid dosing machine water flow meter 10 connected in series. The bottom of the filter aid dosing tank 13 is connected to a dosing pipeline, which is equipped with a filter aid dosing metering pump 14 and a filter aid dosing flow meter 15.

[0040] The filter aid dosing machine tank 13 serves as a mixing container for the concentrated solution and clean water, and also as a buffer tank, ensuring a stable supply of diluted solution to the coal slurry water system even during concentrated solution replenishment. The filter aid dosing machine stirring device 9 forces the newly injected concentrated solution and clean water into the tank to quickly achieve a uniform concentration, avoiding fluctuations in dosing effect due to uneven mixing. The filter aid dosing machine tank level gauge 12 monitors the real-time liquid level of the diluted solution in the tank, providing the control system with a signal to determine the start / stop replenishment process, thus achieving automatic closed-loop control of the liquid level in the tank. The filter aid dosing machine clean water electrically controlled valve 11 is used to adjust the flow according to the control system's settings. The flow rate of the filter aid dosing machine is precisely controlled by adjusting the opening degree of the liquid. The filter aid dosing machine's water flow meter 10 works in conjunction with the filter aid dosing machine's water electrical control valve 11 to measure the instantaneous flow rate of the water in real time. This provides data feedback for achieving precise dilution of the concentrated solution and water, ensuring the accuracy of the final solution concentration. The filter aid dosing machine's metering pump 14 is used to quantitatively deliver the qualified diluted solution in the tank to the coal slurry water system, thereby achieving precise control of the filter aid dosage. The filter aid dosing machine's flow meter 15 is used to measure the total amount of solution finally added to the process system, facilitating production data statistics and cost accounting, and achieving the effect of quantitative management.

[0041] Please see the appendix Figure 1 Appendix Figure 2 The effective volume of the filter aid concentrate tank 1 is configured according to the solubility of the filter aid at a set temperature and the preset continuous production and use cycle; the feed end of both the filter aid concentrate metering pump 7 and the filter aid dosing machine metering pump 14 is equipped with a filter device to prevent impurities from entering the pump body.

[0042] The volume design of the filter aid concentrate tank 1 is designed to ensure that the amount of medicine prepared in a single batch can cover a long production period, thereby avoiding the waste of human resources and production interruptions caused by frequent medicine preparation, and achieving the effect of improving the system's endurance and automated operation efficiency; the filtration device is used to intercept undissolved large particles or external mechanical impurities that may exist in the medicine solution, thereby preventing hard particles from entering the pump cavity and causing wear or jamming of precision parts, thus achieving the effect of protecting the core power equipment and extending the service life of the metering pump.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for adding filter aids for coal preparation based on unmanned operation, characterized in that, The method is based on a filter aid addition device, which includes a filter aid concentrate dispenser and a filter aid dosing machine; the method includes the following steps: S1. Preparation of concentrated solution: The set amount of filter aid is manually added to the filter aid dosing port (2) of the filter aid concentrated solution tank (1). The control system automatically opens the filter aid concentrated solution water control valve (3) according to the set concentrated solution concentration and volume expansion coefficient. The corresponding amount of water is added through the filter aid concentrated solution water flow meter (4), and the filter aid concentrated solution stirring device (5) is turned on to prepare the filter aid concentrated solution. S2, Liquid level monitoring and automatic replenishment: The liquid level in the filter aid dosing machine tank (13) is monitored in real time by the material level gauge (12) in the tank of the filter aid dosing machine; when the liquid level is low, the control system automatically enters the replenishment mode, starts the filter aid concentrate metering pump (7) to transport the filter aid concentrate to the filter aid dosing machine tank (13), and at the same time opens the filter aid dosing machine water control valve (11) for online dilution; S3, Dilution Flow Control: During the replenishment process, the control system automatically adjusts the opening of the filter aid dosing machine's clean water electrical control valve (11) based on the flow data fed back by the filter aid concentrate flow meter (8), combined with the set target value of the diluent concentration and the volume expansion coefficient of the filter aid at different concentrations, so that the clean water flow measured by the filter aid dosing machine's clean water flow meter (10) reaches the flow value calculated based on the set concentration. S4. Automatic dosing: The metering pump (14) of the filter aid dosing machine runs continuously, and the diluted drug solution in the filter aid dosing machine tank (13) is metered by the filter aid dosing machine flow meter (15) and then transported to the coal slurry water system. S5. Supply Termination: When the level gauge (12) of the filter aid dosing machine tank detects that the liquid level has reached a high level, the filter aid concentrate metering pump (7) will be automatically stopped and the filter aid dosing machine water control valve (11) will be closed.

2. The method for adding filter aid for coal preparation based on unmanned operation according to claim 1, characterized in that, In step S1, the amount of water added during the preparation of the concentrate is calculated based on the mass of the reagent, the set mass volume concentration of the concentrate, and the volume expansion coefficient of the solution at that concentration; the control system automatically closes the filter aid concentrate water control valve (3) when the cumulative water volume reaches the calculated value by performing integral calculation on the flow rate of the water.

3. The method for adding filter aid for coal preparation based on unmanned operation according to claim 1, characterized in that, In step S3, the dilution flow control specifically involves the control system taking the mass of the drug in the diluent as equal to the mass of the drug in the delivered concentrate as the control objective, calculating the required clean water flow rate. This calculation process includes compensation calculations for the difference between the volume expansion coefficient corresponding to the concentration of the concentrate and the volume expansion coefficient corresponding to the concentration of the diluent.

4. The method for adding filter aid for coal preparation based on unmanned operation according to claim 1, characterized in that, In step S2, the filter aid dosing machine tank level gauge (12) is set with three detection points: low liquid level, medium liquid level and high liquid level; the low liquid level is used to trigger the start of concentrated liquid replenishment and water dilution, the high liquid level is used to trigger the stop of replenishment, and the medium liquid level is used for liquid level indication.

5. The method for adding filter aid for coal preparation based on unmanned operation according to claim 1, characterized in that, In step S4, the operating frequency of the filter aid dosing metering pump (14) is related to the amount of flocculant added in the coal slurry water system, and increases with the increase of flocculant dosage to maintain the low viscosity environment required for coal slurry water settling.

6. A filter aid addition device for coal preparation based on unmanned operation, and a filter aid addition method for coal preparation based on unmanned operation according to any one of claims 1-5, characterized in that, This includes a filter aid concentrateer, a filter aid dosing machine, and a control system; The filter aid concentrate machine includes a filter aid concentrate tank (1), with a filter aid dosing port (2) and a filter aid concentrate stirring device (5) above the filter aid concentrate tank (1), and a filter aid concentrate tank level gauge (6) installed; the filter aid concentrate tank (1) is connected to a concentrate preparation water pipeline, which is equipped with a filter aid concentrate water control valve (3) and a filter aid concentrate water flow meter (4) connected in series. The filter aid concentrate tank (1) is connected to the filter aid dosing machine through a concentrate delivery pipeline, and the concentrate delivery pipeline is equipped with a filter aid concentrate metering pump (7) and a filter aid concentrate flow meter (8). The filter aid dosing machine includes a filter aid dosing machine tank (13), on which a filter aid dosing machine stirring device (9) and a filter aid dosing machine tank level gauge (12) are provided; the filter aid dosing machine tank (13) is connected to a dilution water pipeline, on which a filter aid dosing machine water flow meter (10) and a filter aid dosing machine water electrically controlled valve (11) are connected in series; the bottom of the filter aid dosing machine tank (13) is connected to a dosing pipeline, on which a filter aid dosing machine metering pump (14) and a filter aid dosing machine flow meter (15) are provided. The control system is electrically connected to the filter aid concentrate water control valve (3), filter aid concentrate water flow meter (4), filter aid concentrate stirring device (5), filter aid concentrate tank level gauge (6), filter aid concentrate metering pump (7), filter aid concentrate flow meter (8), filter aid dosing machine stirring device (9), filter aid dosing machine water flow meter (10), filter aid dosing machine water control valve (11), filter aid dosing machine tank level gauge (12), filter aid dosing machine metering pump (14) and filter aid dosing machine flow meter (15), and is used to perform logic operations and automatic control.

7. A filter aid addition device for coal preparation based on unmanned operation according to claim 6, characterized in that, The filter aid concentrate machine includes a filter aid concentrate tank (1), and a filter aid dosing port (2) and a filter aid concentrate stirring device (5) are provided on the top of the filter aid concentrate tank (1), and a filter aid concentrate tank level gauge (6) is installed. The filter aid concentrate tank (1) is connected to a concentrate preparation water pipeline, which is equipped with a filter aid concentrate water control valve (3) and a filter aid concentrate water flow meter (4) connected in series.

8. A filter aid addition device for coal preparation based on unmanned operation according to claim 6, characterized in that, A concentrated liquid delivery pipeline is provided between the filter aid concentrate machine and the filter aid dosing machine. A filter aid concentrated liquid metering pump (7) and a filter aid concentrated liquid flow meter (8) are provided on the concentrated liquid delivery pipeline. The input end of the filter aid concentrated liquid metering pump (7) is connected to the bottom of the filter aid concentrated liquid tank (1), and the output end extends to the filter aid dosing machine.

9. A filter aid addition device for coal preparation based on unmanned operation according to claim 6, characterized in that, The filter aid dosing machine includes a filter aid dosing machine tank (13), and the filter aid dosing machine tank (13) is equipped with a filter aid dosing machine stirring device (9) and a filter aid dosing machine tank level gauge (12). The filter aid dosing machine tank (13) is connected to a dilution water pipeline, which is equipped with a filter aid dosing machine water control valve (11) and a filter aid dosing machine water flow meter (10) connected in series. The bottom of the filter aid dosing machine tank (13) is connected to a dosing pipeline, which is equipped with a filter aid dosing machine metering pump (14) and a filter aid dosing machine flow meter (15).

10. A filter aid addition device for coal preparation based on unmanned operation according to claim 8, characterized in that, The effective volume of the filter aid concentrate tank (1) is configured according to the solubility of the filter aid at a set temperature and the preset continuous production and use cycle; the feed end of the filter aid concentrate metering pump (7) and the filter aid dosing machine metering pump (14) are both equipped with a filter device to prevent impurities from entering the pump body.

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