A system for intelligent adjustment and control of the ash content of a coal slurry product and its control method

Abstract

The present invention discloses a system for intelligent adjustment and control of the ash content of coal slurry products and its control method, which relates to the technical field of flotation dosing. The system includes: an ash content detection unit for real-time collection of flotation feed data, ash content data and yield data during the coal slime flotation process; a flotation intelligent decision-making subsystem for generating a dosing instruction based on preset flotation production index data and flotation feed data, and during the coal slime flotation process, determining a chemical dosage adjustment instruction according to the ash content data and the yield data; an intelligent emulsifying dosing station for adding chemicals to the pulp pretreatment device or flotation equipment according to the dosing instruction or the chemical dosage adjustment instruction to carry out the coal slime flotation process, thereby obtaining clean coal and tail coal. The present invention improves the degree of intelligence of flotation in coal preparation plants, and thus improves work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of flotation dosing, and particularly to a system for intelligent adjustment and control of the ash content of coal slurry products and a control method therefor. Background Art

[0002] Currently, the flotation process in the vast majority of coal preparation plants relies on manual operation, and the accuracy of reagent adjustment is low. The following disadvantages exist: 1) The flotation process is not automatic or intelligent; 2) The labor intensity of workers is high, and the flotation cost is high; 3) The detection cycle of the ash content of clean coal or tail coal is long, resulting in untimely adjustment of the reagent dosage and large fluctuations in the product indexes of clean coal or tail coal.

[0003] Moreover, the degree of automation control in the existing flotation process is weak. The adjustment of the reagent dosage is mostly open-loop control, and the adjustment logic of the reagent dosage is mostly adjusted according to the change in the dry coal slime content of the flotation feed. It cannot be adjusted according to the change in the ash content of the flotation feed, nor can it be adjusted according to the change in the ash content index of clean coal or tail coal, thus unable to achieve a true closed-loop control of feedforward and feedback. Summary of the Invention

[0004] The purpose of the present invention is to provide a system for intelligent adjustment and control of the ash content of coal slurry products and a control method therefor, so as to improve the degree of intelligence of flotation in coal preparation plants and further improve work efficiency.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The present invention provides a system for intelligent adjustment and control of the ash content of coal slurry products, including:

[0007] An ash content detection unit for real-time collection of flotation feed data, ash content data and yield data during the coal slime flotation process; the ash content data includes the ash content of the flotation feed, the ash content of clean coal and the ash content of tail coal; the yield data includes the clean coal yield and the tail coal yield;

[0008] A flotation intelligent decision-making subsystem connected to the ash content detection unit for generating a dosing instruction based on preset flotation production index data and the flotation feed data, and determining a reagent dosage adjustment instruction according to the ash content data and the yield data during the coal slime flotation process;

[0009] An intelligent emulsifying dosing station connected to the flotation intelligent decision-making subsystem for adding reagents to the pulp pretreatment device or flotation equipment according to the dosing instruction or the reagent dosage adjustment instruction to carry out the coal slime flotation process, thereby obtaining clean coal and tail coal.

[0010] Optionally, the preset flotation production index data includes preset clean coal ash content data, preset tail coal ash content data, preset tail coal yield, and preset clean coal yield; the flotation feed data includes flotation feed flow rate and flotation feed concentration;

[0011] The flotation intelligent decision-making subsystem specifically includes:

[0012] A data receiving module, configured to receive preset flotation production index data, the flotation feed data, the ash content data, and the yield data;

[0013] A first chemical addition amount determination module, configured to determine a coal slime chemical ratio according to the preset flotation production index data, and then determine an initial chemical addition amount according to the coal slime chemical ratio, the flotation feed flow rate, and the flotation feed concentration;

[0014] A first chemical addition amount adjustment module, configured to determine an actual chemical addition amount according to the flotation feed ash content and the initial chemical addition amount, and then generate a chemical addition instruction according to the actual chemical addition amount.

[0015] Optionally, the flotation intelligent decision-making subsystem further includes:

[0016] A second chemical addition amount adjustment module, configured to:

[0017] Perform a difference calculation between the clean coal ash content and the preset clean coal ash content data to obtain a first result;

[0018] Perform a difference calculation between the tail coal ash content and the preset tail coal ash content data to obtain a second result;

[0019] Perform a difference calculation between the clean coal yield and the preset clean coal yield to obtain a third result;

[0020] Perform a difference calculation between the tail coal yield and the preset tail coal yield to obtain a fourth result;

[0021] When both the first result and the second result meet the preset qualified conditions, generate a chemical dosage adjustment instruction according to the third result and the fourth result;

[0022] When the first result or the second result does not meet the preset qualified conditions, generate a chemical dosage adjustment instruction according to the first result and the second result.

[0023] Optionally, it further includes:

[0024] A coal preparation plant production information decision-making center, connected to the flotation intelligent decision-making subsystem, configured to obtain preset flotation production index data and send the preset flotation production index data to the flotation intelligent decision-making subsystem.

[0025] Optionally, the flotation feed data further includes clean coal flow rate, clean coal concentration, tail coal flow rate, tail coal concentration, flotation feed pulp characteristic parameters, clean coal pulp characteristic parameters, and tail coal pulp characteristic parameters;

[0026] The ash detection unit specifically includes:

[0027] A pulp ash real-time online monitoring unit, configured to collect in real time the flotation feed flow rate, the flotation feed concentration, the flotation feed pulp characteristic parameters, the clean coal flow rate, the clean coal concentration, the clean coal pulp characteristic parameters, the tail coal flow rate, the tail coal concentration, and the tail coal pulp characteristic parameters;

[0028] An ash calculation unit, connected to the pulp ash real-time online monitoring unit, configured to calculate the flotation feed ash according to the flotation feed pulp characteristic parameters, calculate the clean coal ash according to the clean coal pulp characteristic parameters, and calculate the tail coal ash according to the tail coal pulp characteristic parameters;

[0029] A yield calculation unit, connected to the pulp ash real-time online monitoring unit, configured to calculate the dry coal slime amount of the feed according to the flotation feed flow rate and the flotation feed concentration, calculate the clean coal yield according to the clean coal flow rate and the clean coal concentration, and calculate the tail coal yield according to the tail coal flow rate and the tail coal concentration.

[0030] To achieve the above object, the present invention also provides the following technical solutions:

[0031] A control method for a system for intelligent adjustment and control of the ash of a coal slurry product, characterized in that the method includes:

[0032] Real-time collection of flotation feed data, ash data, and yield data during the coal slime flotation process through an ash detection unit; the ash data includes flotation feed ash, clean coal ash, and tail coal ash; the yield data includes clean coal yield and tail coal yield;

[0033] Adopt a flotation intelligent decision-making subsystem to generate a dosing instruction based on preset flotation production index data and the flotation feed data, and during the coal slime flotation process, determine a reagent dosage adjustment instruction according to the ash data and the yield data;

[0034] Add reagents to the pulp pretreatment device or flotation equipment according to the dosing instruction or the reagent dosage adjustment instruction through an intelligent emulsifying dosing station to carry out the coal slime flotation process, and thus obtain clean coal and tail coal.

[0035] According to the specific embodiments provided by the present invention, the following technical effects of the present invention are disclosed:

[0036] The present invention provides a system and a control method for intelligent adjustment and control of the ash content of coal slurry products. Before the coal slime flotation process, the flotation intelligent decision-making subsystem automatically generates a chemical dosing instruction based on preset flotation production index data and flotation feed data. The intelligent emulsifying chemical dosing station adds chemicals to the pulp pretreatment device or flotation equipment according to the chemical dosing instruction to carry out the coal slime flotation process, and then clean coal and tail coal are obtained. The ash content, flow rate, and concentration data in the coal slime flotation process are collected by the ash content data acquisition module. In the flotation intelligent decision-making subsystem, the chemical dosage adjustment instruction is determined according to the ash content data and the yield data, and the intelligent emulsifying chemical dosing station adds chemicals to the pulp pretreatment device or flotation equipment according to the chemical dosage adjustment instruction to realize emulsifying flotation. The present invention realizes the intelligent closed-loop feedback control of emulsifying flotation, can complete the flotation production task as scheduled under preset process parameters, not only greatly saves human resources and avoids errors and lags caused by manual operation, but also greatly improves the flotation production efficiency and production quality, accurately and stably controls the flotation index, and brings a huge improvement in economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic structural diagram of the system for intelligent adjustment and control of the ash content of the coal slurry product of the present invention;

[0039] Figure 2 It is a schematic structural diagram of an embodiment of the present invention;

[0040] Figure 3 It is a schematic flow diagram of the control method of the system for intelligent adjustment and control of the ash content of the coal slurry product of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] The present invention provides a system and a control method for intelligent adjustment and control of the ash content of coal slurry products, which solve the problems existing in the traditional dosing method, such as inaccurate and untimely manual operation, difficult to guarantee flotation indexes, non-automatic and non-intelligent flotation process, inability to perform real-time closed-loop feedback control, unstable production, poor coal slime separation effect and waste of reagents.

[0043] In order to make the objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Embodiment 1

[0045] As Figure 1 shown, this embodiment provides a system for intelligent adjustment and control of the ash content of coal slurry products, including an ash detection unit 100, a flotation intelligent decision-making subsystem 200 and an intelligent emulsifying dosing station 300.

[0046] The ash detection unit 100 is used to collect in real time the flotation feed data, the ash content data and the yield data during the coal slime flotation process; the ash content data includes the flotation feed ash content, the clean coal ash content and the tail coal ash content; the yield data includes the clean coal yield and the tail coal yield. The flotation feed data includes the flotation feed flow rate and the flotation feed concentration.

[0047] The flotation intelligent decision-making subsystem 200 is connected to the ash detection unit, and is used to generate a dosing instruction based on the preset flotation production index data and the flotation feed data, and during the coal slime flotation process, determine a reagent dosage adjustment instruction according to the ash content data and the yield data. The preset flotation production index data includes preset clean coal ash content data, preset tail coal ash content data, preset tail coal yield and preset clean coal yield.

[0048] The intelligent emulsifying dosing station 300 is connected to the flotation intelligent decision-making subsystem, and is used to add reagents to the pulp pretreatment device or the flotation equipment according to the dosing instruction or the reagent dosage adjustment instruction to carry out the coal slime flotation process, so as to obtain clean coal and tail coal.

[0049] Specifically, the flotation intelligent decision-making subsystem 200 specifically includes:

[0050] A data receiving module, which is used to receive the preset flotation production index data, the flotation feed data, the ash content data and the yield data.

[0051] The first chemical dosage determination module, connected to the data receiving module, is used to determine the coal slime chemical ratio according to the preset flotation production index data, and then determine the initial chemical dosage according to the coal slime chemical ratio, the flotation feed flow rate, and the flotation feed concentration. Specifically, according to the preset flotation production index data issued by the production information decision center of the coal preparation plant, calculate the clean coal ash content and the tail coal ash content to meet the standards, and then determine the ratio of the required coal slime amount to the chemical dosage, that is, the chemical dosage; calculate the coal slime quality according to the dry coal slime flow rate and the dry coal slime concentration, and then determine the initial chemical dosage based on the chemical dosage.

[0052] The first chemical dosage adjustment module is used to determine the actual chemical dosage according to the flotation feed ash content and the initial chemical dosage, and then generate a chemical dosing instruction according to the actual chemical dosage. Among them, the chemical dosing instruction includes the dosage of the chemical, the pulp pretreatment equipment or the flotation machine used for dosing, etc.

[0053] The second chemical dosage adjustment module is used for:

[0054] 1) Calculate the difference between the clean coal ash content and the preset clean coal ash content data to obtain a first result;

[0055] 2) Calculate the difference between the tail coal ash content and the preset tail coal ash content data to obtain a second result;

[0056] 3) Calculate the difference between the clean coal yield and the preset clean coal yield to obtain a third result;

[0057] 4) Calculate the difference between the tail coal yield and the preset tail coal yield to obtain a fourth result;

[0058] 5) When both the first result and the second result meet the preset qualified conditions, generate a chemical dosage adjustment instruction according to the third result and the fourth result; that is, first judge whether the ash content data meets the preset qualified conditions. Generally speaking, the clean coal ash content fluctuates around the preset clean coal ash content data, and the difference or error does not exceed a certain range. At this time, it means that the ash content data is qualified. On the basis of the qualified ash content data, adjust the chemical dosage based on the yield to increase the output while ensuring the ash content.

[0059] Among them, generating a chemical dosage adjustment instruction according to the third result and the fourth result specifically includes: when both the first result and the second result are within the preset error range, maintain the current chemical dosage; if the first result or the second result is higher than the maximum value in the preset error range, reduce the chemical dosage; if the first result or the second result is lower than the minimum value in the preset error range, increase the chemical dosage until it is within the preset error range. Whether increasing or decreasing the chemical dosage as described above belongs to the fine adjustment of the chemical dosage.

[0060] 6) When the first result or the second result does not meet the preset qualified conditions, a chemical dosage adjustment instruction is generated according to the first result and the second result. Generally speaking, when the ash content is higher than the preset ash content, it means that the flotation is unqualified; when the ash content is lower than the preset ash content, there will be a situation of resource waste. Therefore, when the ash content data does not meet the preset qualified conditions, the chemical dosage is adjusted according to the ash content data.

[0061] During the data adjustment process, the present invention realizes the individual control of the chemical dosage added to each flotation machine or a single flotation chamber through the flotation intelligent decision-making subsystem 200.

[0062] The flotation feed data further includes clean coal flow rate, clean coal concentration, tail coal flow rate, tail coal concentration, flotation feed pulp characteristic parameters, clean coal pulp characteristic parameters, and tail coal pulp characteristic parameters; the ash content detection unit 100 specifically includes:

[0063] The pulp ash content real-time online monitoring unit is used to collect in real time the flotation feed flow rate, the flotation feed concentration, the flotation feed pulp characteristic parameters, the clean coal flow rate, the clean coal concentration, the clean coal pulp characteristic parameters, the tail coal flow rate, the tail coal concentration, and the tail coal pulp characteristic parameters. Among them, the flotation feed flow rate, the flotation feed concentration, the flotation feed pulp characteristic parameters, the clean coal flow rate, the clean coal concentration, the clean coal pulp characteristic parameters, the tail coal flow rate, the tail coal concentration, and the tail coal pulp characteristic parameters are all collected by corresponding sensors or other real-time online monitoring units. Temperature data during the coal slime flotation process can also be collected. In addition, the calculation of the ash content at the corresponding positions of the flow rate and concentration requires the corresponding pulp characteristic parameters, and the specific data protected by the specific pulp characteristic parameters can be set by the staff according to the actual situation.

[0064] The ash content calculation unit is connected to the pulp ash content real-time online monitoring unit, and is used to calculate the flotation feed ash content according to the flotation feed pulp characteristic parameters, calculate the clean coal ash content according to the clean coal pulp characteristic parameters, and calculate the tail coal ash content according to the tail coal pulp characteristic parameters. Specifically, an intelligent ash content algorithm model is used for ash content calculation. And this intelligent ash content algorithm model is stored in the database. By calculating the flotation feed ash content, clean coal ash content, and tail coal ash content through the intelligent ash content algorithm model, and then calculating the flotation yield correspondingly, real-time ash content monitoring with a minimum interval of 1 second can be achieved.

[0065] The yield calculation unit is connected to the pulp ash content real-time online monitoring unit, and is used to calculate the dry coal slime amount of the feed according to the flotation feed flow rate and the flotation feed concentration, calculate the clean coal yield according to the clean coal flow rate and the clean coal concentration, and calculate the tail coal yield according to the tail coal flow rate and the tail coal concentration

[0066] During the data collection process, relevant staff can detect the relevant data of the pulp ash content for each flotation machine or individual flotation chamber as needed, thereby achieving independent and rapid detection of the feed and product indicators for each flotation machine or individual flotation chamber. In addition, the intelligent ash content algorithm model has a big data learning function. Based on the data update in the database, it can complete the self-update and iteration of the machine learning model, continuously reducing the measurement error.

[0067] The intelligent emulsifying chemical dosing station 300 includes two groups of chemical dosing components. Each group of chemical dosing components is used to add chemicals to the pulp pretreatment device or flotation equipment and perform cyclic emulsification flotation; and the two groups of chemical dosing components operate intermittently, which can achieve rapid emulsification of the chemicals (average particle size <5μm), has the functions of chemical storage and cyclic emulsification, can cyclically emulsify the chemicals in the chemical storage chamber, and the chemical dosing station can achieve the functions of quantitative, stable, continuous chemical dosing, and multi-point chemical dosing.

[0068] Each group of the chemical dosing components includes an ultrasonic emulsification chamber, an electromagnetic flowmeter, a concentration meter, a PLC controller, and a chemical storage tank; the PLC controller is respectively connected to the flotation intelligent decision-making subsystem, the chemical storage tank, the concentration meter, the electromagnetic flowmeter, and the ultrasonic emulsification chamber.

[0069] During operation, the PLC controller outputs a first opening instruction and a second opening instruction according to the chemical dosing instruction or chemical dosage adjustment instruction output by the flotation intelligent decision-making subsystem; the chemical storage tank is opened according to the first opening instruction to apply the stored chemicals to the coal slime sample; the ultrasonic emulsification chamber emulsifies the coal slime sample to which the chemicals have been applied according to the second opening instruction. At the same time, the concentration meter and the electromagnetic flowmeter respectively detect the slurry concentration and the applied chemical flow rate in the sample, and send them to the PLC controller. The PLC controller issues a closing instruction according to the received slurry concentration and chemical flow rate, so that the storage tank stops applying chemicals and the ultrasonic emulsification chamber stops working.

[0070] Preferably, the system of this embodiment further includes:

[0071] The coal preparation plant production information decision-making center, which is connected to the flotation intelligent decision-making subsystem, is used to obtain the preset flotation production index data and send the preset flotation production index data to the flotation intelligent decision-making subsystem. Among them, the specific values of each item in the preset flotation production index data that meet the production index are given by the staff familiar with flotation chemical dosing according to experience.

[0072] The display input module is respectively connected to the coal preparation plant production information decision-making center, the ash content detection unit 100, and the flotation intelligent decision-making subsystem 200. The display input module is used to display the ash content data, the yield data, the flotation feed data, the chemical dosing instruction, the chemical dosage adjustment instruction, and the preset flotation production index data.

[0073] The production information decision-making center of the coal preparation plant controls and monitors the entire intelligent flotation system, and information such as real-time drug consumption, feed, concentrate, and tailing ash content in each flotation chamber, pulp flow rate, concentration, and hourly dry coal slime volume are all transmitted to the production information decision-making center of the coal preparation plant in real time. Operators can see the process parameters of each link and the working status of each unit equipment in the flotation production on the display input module, and can preset and adjust the process parameters of each link on the display input module.

[0074] Such as Figure 2 As shown, it is a specific application of the system for intelligent adjustment and control of coal slurry product ash content of the present invention. The system includes: the production information decision-making center of the coal preparation plant, the flotation intelligent decision-making system (i.e., the flotation intelligent decision-making subsystem), the real-time online monitoring unit for pulp ash content, the intelligent emulsifying chemical dosing station, and the pulp pretreatment device and flotation equipment.

[0075] The real-time online monitoring unit for pulp ash content detects production parameters such as flotation feed ash content, flow rate, dry coal slime volume, and pulp concentration in real time and sends them to the flotation intelligent decision-making system; the flotation intelligent decision-making system gives the best matching chemical dosing instruction according to the preset concentrate ash content, tailing ash content index, preset chemical dosage, and actual feed condition; during production, the real-time monitoring unit for pulp ash content detects parameters such as feed, concentrate, tailing ash content, yield, and dry coal slime volume of each flotation equipment in real time and transmits them to the flotation intelligent decision-making system, and compares them with the preset ash content index. If they match, the current chemical dosage is maintained; otherwise, the chemical dosage is automatically adjusted according to the difference of the index until the current ash value matches the preset ash value. The intelligent emulsifying chemical dosing station adopted by this system has the function of multi-point chemical dosing, and can realize the individual control of the chemical dosage of a single flotation equipment or even a single flotation chamber; it can not only intelligently control the entire flotation process to proceed as scheduled under the preset process parameters, but also perform manual intervention through the decision-making center, greatly improving the degree of intelligence and work efficiency.

[0076] Embodiment 2

[0077] Such as Figure 3 As shown, this embodiment provides a control method for the system for intelligent adjustment and control of coal slurry product ash content, which is applied to the system for intelligent adjustment and control of coal slurry product ash content in Embodiment 1. The control method includes:

[0078] Step 101, collect flotation feed data, ash content data and yield data in the coal slime flotation process in real time through the ash content detection unit; the ash content data includes flotation feed ash content, concentrate ash content and tailing ash content; the yield data includes concentrate yield and tailing yield.

[0079] Step 201: Use the flotation intelligent decision-making subsystem to generate a chemical addition instruction based on the preset flotation production index data and the flotation feed data, and during the coal slime flotation process, determine a chemical dosage adjustment instruction according to the ash content data and the yield data.

[0080] Step 301: Through the intelligent emulsifying chemical addition station, add chemicals to the pulp pretreatment device or flotation equipment according to the chemical addition instruction or the chemical dosage adjustment instruction to carry out the coal slime flotation process, thereby obtaining clean coal and tail coal.

[0081] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0082] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A system for intelligent adjustment and control of the ash content of a coal slurry product, characterized in that, The system includes: An ash detection unit for real-time collection of flotation feed data, ash data and yield data during the coal slime flotation process; the ash data includes flotation feed ash, clean coal ash and tail coal ash; the yield data includes clean coal yield and tail coal yield; A flotation intelligent decision-making subsystem connected to the ash detection unit, for generating a dosing instruction based on preset flotation production index data and the flotation feed data, and during the coal slime flotation process, determining a reagent dosage adjustment instruction according to the ash data and the yield data; The preset flotation production index data includes preset clean coal ash data, preset tail coal ash data, preset tail coal yield and preset clean coal yield; the flotation feed data includes flotation feed flow rate and flotation feed concentration; The flotation intelligent decision-making subsystem specifically includes: A data receiving module for receiving preset flotation production index data, the flotation feed data, the ash data and the yield data; A first dosing amount determination module for determining the coal slime reagent ratio according to the preset flotation production index data, and then determining the initial dosing amount according to the coal slime reagent ratio, the flotation feed flow rate and the flotation feed concentration; A first dosing amount adjustment module for determining the actual dosing amount according to the flotation feed ash and the initial dosing amount, and then generating a dosing instruction according to the actual dosing amount; A second dosing amount adjustment module for: calculating the difference between the clean coal ash and the preset clean coal ash data to obtain a first result; calculating the difference between the tail coal ash and the preset tail coal ash data to obtain a second result; calculating the difference between the clean coal yield and the preset clean coal yield to obtain a third result; calculating the difference between the tail coal yield and the preset tail coal yield to obtain a fourth result; when both the first result and the second result meet the preset qualified conditions, generating a reagent dosage adjustment instruction according to the third result and the fourth result; when the first result or the second result does not meet the preset qualified conditions, generating a reagent dosage adjustment instruction according to the first result and the second result; An intelligent emulsifying dosing station connected to the flotation intelligent decision-making subsystem, for adding reagents to the pulp pretreatment device or flotation equipment according to the dosing instruction or the reagent dosage adjustment instruction to carry out the coal slime flotation process, and thus obtaining clean coal and tail coal.

2. The system for intelligent adjustment and control of the ash content of the coal slurry product according to claim 1, wherein It further includes: A coal preparation plant production information decision-making center connected to the flotation intelligent decision-making subsystem, for obtaining preset flotation production index data and sending the preset flotation production index data to the flotation intelligent decision-making subsystem.

3. The system for intelligent adjustment and control of the ash content of the coal slurry product according to claim 1, wherein, The flotation feed data further includes clean coal flow rate, clean coal concentration, tail coal flow rate, tail coal concentration, flotation feed pulp characteristic parameters, clean coal pulp characteristic parameters and tail coal pulp characteristic parameters; The ash detection unit specifically includes: The pulp ash real-time on-line monitoring unit is used to collect in real time the flotation feed flow rate, the flotation feed concentration, the flotation feed pulp characteristic parameters, the clean coal flow rate, the clean coal concentration, the clean coal pulp characteristic parameters, the tail coal flow rate, the tail coal concentration and the tail coal pulp characteristic parameters; The ash calculation unit is connected to the pulp ash real-time on-line monitoring unit and is used to calculate the flotation feed ash according to the flotation feed pulp characteristic parameters, calculate the clean coal ash according to the clean coal pulp characteristic parameters, and calculate the tail coal ash according to the tail coal pulp characteristic parameters; The yield calculation unit is connected to the pulp ash real-time on-line monitoring unit and is used to calculate the dry coal slime amount of the feed according to the flotation feed flow rate and the flotation feed concentration, calculate the clean coal yield according to the clean coal flow rate and the clean coal concentration, and calculate the tail coal yield according to the tail coal flow rate and the tail coal concentration.

4. Control method of a system for intelligent adjustment and control of ash content of coal slurry products, characterized in that, The method includes: Collecting in real time the flotation feed data, the ash data and the yield data in the coal slime flotation process through the ash detection unit; the ash data includes the flotation feed ash, the clean coal ash and the tail coal ash; the yield data includes the clean coal yield and the tail coal yield; Adopting a flotation intelligent decision-making subsystem to generate a dosing instruction based on the preset flotation production index data and the flotation feed data, and determining a chemical dosage adjustment instruction according to the ash data and the yield data during the coal slime flotation process; The preset flotation production index data includes preset clean coal ash data, preset tail coal ash data, preset tail coal yield and preset clean coal yield; the flotation feed data includes the flotation feed flow rate and the flotation feed concentration; The flotation intelligent decision-making subsystem specifically includes: A data receiving module for receiving the preset flotation production index data, the flotation feed data, the ash data and the yield data; A first chemical dosage determination module for determining the coal slime chemical ratio according to the preset flotation production index data, and then determining the initial chemical dosage according to the coal slime chemical ratio, the flotation feed flow rate and the flotation feed concentration; A first chemical dosage adjustment module for determining the actual chemical dosage according to the flotation feed ash and the initial chemical dosage, and then generating a dosing instruction according to the actual chemical dosage; A second chemical dosage adjustment module for: calculating the difference between the clean coal ash and the preset clean coal ash data to obtain a first result; calculating the difference between the tail coal ash and the preset tail coal ash data to obtain a second result; calculating the difference between the clean coal yield and the preset clean coal yield to obtain a third result; calculating the difference between the tail coal yield and the preset tail coal yield to obtain a fourth result; when both the first result and the second result meet the preset qualified conditions, generating a chemical dosage adjustment instruction according to the third result and the fourth result; when the first result or the second result does not meet the preset qualified conditions, generating a chemical dosage adjustment instruction according to the first result and the second result; Through the intelligent emulsification chemical dosing station, according to the chemical dosing instruction or the chemical dosage adjustment instruction, chemicals are added to the pulp pretreatment device or the flotation equipment to carry out the coal slime flotation process, and thus clean coal and tail coal are obtained.

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