Automatic control method for product quality of a coarse slime separation system

Abstract

The present invention discloses a method for automatically regulating the product quality of a coarse slime separation system in the technical field of coal slime separation and recovery, including: obtaining the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tail coal particle size of the interference bed separator, as well as the clean coal ash content detection value and the tail coal ash content detection value; controlling the reflux flow rate of the hydrocyclone group based on the real-time feed concentration value of the interference bed separator; setting the top water volume of the interference bed separator based on the real-time feed particle size and feed flow rate of the interference bed separator; adjusting the top water volume of the interference bed separator based on the feed particle size, clean coal particle size and tail coal particle size of the interference bed separator; and adjusting the set density based on the clean coal ash content detection value and the tail coal ash content detection value of the interference bed separator. By means of the "feedforward + feedback" adjustment method, the present invention stabilizes the coarse slime separation process from the source, thereby stabilizing the product quality and effectively solving the problem of untimely or imperfect production regulation.

Description

Technical Field

[0001] The present invention relates to an automatic control method for product quality of a coarse slime separation system, belonging to the technical field of coal slime separation and recovery. Background Art

[0002] For coarse slime separation, common process equipment in coal preparation plants includes coal slime heavy medium cyclones, water medium cyclones, interference bed separators, spiral separators, etc. Interference bed separators are commonly used in coking coal preparation plants for coarse slime separation. The separation principle of the interference bed separator is the principle of interference settlement. During the separation process, the pulp enters the feed well tangentially through the feed pipe, and under the action of the upward water flow and its own gravity, an interference bed layer is formed in the tank. Low-density particles move upward, overflow to the overflow tank and are discharged from the overflow port, while high-density particles move downward and pass through the interference bed layer, concentrating at the bottom of the tank and being discharged from the underflow port. A density meter is arranged in the middle and lower part of the interference bed layer, and a discharge valve is arranged at the bottom of the tank body. The discharge valve is automatically opened or closed and the opening degree of the discharge valve is controlled according to the detected bed layer density.

[0003] The coarse slime separation link is a typical benefit growth point in coal preparation plants, but the production management has always been relatively extensive. During actual production, the adjustment of product indexes of the coarse slime separation system mainly relies on manual sampling and testing. The set density and top water volume of the coarse slime separation system are adjusted by using the particle size grade and ash content of the tested products as feedback. However, the lag of the particle size test results and the tested ash content is strong, generally at least 1.5 hours, resulting in the inability to adjust the separation parameters in real time, poor timeliness, and poor stability of the separation product indexes, which do not meet the requirements of the product market.

[0004] In recent years, during the intelligent construction of individual coal preparation plants, the production control system of the interference bed separator has been upgraded. By adding online monitoring sensors for clean coal and tail coal of the interference bed separator and realizing real-time linkage between the online monitoring data and the adjustment of the set density and top water volume of the interference bed separator, the stability of product quality has been improved. However, the decision-making algorithm based on the linkage between online detection data and production parameters is relatively extensive, resulting in poor control effect. In addition, this associated control often only focuses on the particle size grade and clean coal ash content of clean coal products, ignoring the adjustment requirements of tail coal product indexes. Therefore, it can only solve some production control problems and cannot completely solve the problems of poor timeliness of the interference bed production process adjustment, poor control effect, and unstable feed, including the instability of the production process caused by unstable feed concentration, flow rate or particle size, and the deterioration of production indexes. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an automatic control method for product quality of a coarse slime separation system. Through the "feedforward + feedback" adjustment method, the coarse slime separation process is stabilized from the source, thereby stabilizing the product quality and effectively solving the problems of untimely or imperfect production control.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions:

[0007] In a first aspect, the present invention provides an automatic product quality control method for a coarse slime separation system, including:

[0008] Obtaining the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tail coal particle size of the interference bed separator, as well as the clean coal ash content detection value and tail coal ash content detection value;

[0009] Controlling the reflux flow rate of the hydrocyclone group based on the real-time feed concentration value of the interference bed separator;

[0010] Setting the top water volume of the interference bed separator based on the real-time feed particle size and feed flow rate of the interference bed separator;

[0011] Adjusting the top water volume of the interference bed separator based on the feed particle size, clean coal particle size and tail coal particle size of the interference bed separator;

[0012] Adjusting the set density based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator.

[0013] Further, controlling the reflux flow rate of the hydrocyclone group based on the real-time feed concentration value of the interference bed separator includes:

[0014] Setting the feed concentration range of the interference bed separator;

[0015] Comparing the real-time feed concentration value of the interference bed separator with the feed concentration range;

[0016] When the real-time feed concentration value of the interference bed separator is within the feed concentration range, controlling both the underflow reflux regulating valve and the overflow reflux regulating valve of the hydrocyclone group to remain in a normally closed state;

[0017] When the real-time feed concentration value of the interference bed separator is higher than the feed concentration range, opening the overflow reflux regulating valve of the hydrocyclone group to return a part of the overflow of the hydrocyclone to the slime water bucket, reducing the feed concentration of the hydrocyclone group, and thus reducing the feed concentration of the interference bed separator;

[0018] When the real-time feed concentration value of the interference bed separator is lower than the feed concentration range, opening the underflow reflux regulating valve of the hydrocyclone group to return a part of the underflow of the hydrocyclone to the slime water bucket, increasing the feed concentration of the hydrocyclone group, and thus increasing the feed concentration of the interference bed separator.

[0019] Further, the opening adjustment calculation method for the underflow reflux regulating valve and the overflow reflux regulating valve of the classification cyclone group is as follows: Set the basic value, upper limit, and lower limit for the valve opening. During the return flow adjustment process, the valve opening is adjusted within the upper and lower limits. The calculation formula is: In the formula: m is the valve opening, m0 is the basic value of the valve opening, is the upper limit of the valve opening, is the lower limit of the valve opening, k1 is the calculation slope, y is the actual feed concentration of the interference bed separator, and x is the optimal feed concentration of the interference bed separator.

[0020] Further, during the process of adjusting the valve opening:

[0021] In response to the feed concentration of the classification cyclone group being higher than the preset upper limit or the feed flow being lower than the preset lower limit, close the overflow reflux regulating valve and the underflow reflux regulating valve of the classification cyclone group, and when the set time has passed and it still has not returned to the threshold range, push a pop-up message to remind the upstream de-sludging link to increase the water spraying amount;

[0022] In response to the feed concentration of the classification cyclone group being lower than the preset lower limit or the feed flow being higher than the preset upper limit, close the overflow reflux regulating valve and the underflow reflux regulating valve of the classification cyclone group, and when the set time has passed and it still has not returned to the threshold range, push a pop-up message to remind the upstream de-sludging link to reduce the water spraying amount;

[0023] The number of opened cyclones in the classification cyclone group is automatically controlled according to the real-time feed concentration and feed flow of the classification cyclone group to adapt to the feed flow of the classification cyclone group.

[0024] Further, based on the real-time feed particle size and feed flow of the interference bed separator, set the top water amount of the interference bed separator, including:

[0025] Set the threshold range of the feed particle size and feed flow of the interference bed separator;

[0026] Compare the real-time feed particle size and feed flow of the interference bed separator with the threshold range;

[0027] In response to the feed flow being within the threshold range, set the top water amount to the basic value;

[0028] In response to the feed flow exceeding the threshold range, set the top water amount to is the basic value of the top water amount, k2 is the calculation coefficient two for adjusting the top water amount, is the feed flow;

[0029] In response to the feed particle size of 1 - 0.5mm exceeding the threshold range, set the top water amount to , Q d1For the calculated top water volume based on flow comparison, k3 is the calculation coefficient three for top water volume adjustment. is the feed particle size of 1 - 0.5mm, and z2 is the optimal proportion at the particle size of 1 - 0.5mm.

[0030] When the feed particle size less than 0.25mm exceeds the threshold range, set the top water volume to , Q d1 For the calculated top water volume based on flow comparison, k4 is the calculation coefficient four for top water volume adjustment. is the feed particle size less than 0.25mm, and z4 is the optimal proportion at the particle size less than 0.25mm.

[0031] Furthermore, adjusting the top water volume of the interference bed separator based on the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator includes:

[0032] Setting the mapping relationship between the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator;

[0033] Comparing the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator with the preset mapping relationship;

[0034] When the proportion of clean coal particle size in the coarse particle size range of 1 - 0.5mm is greater than the clean coal particle size proportion threshold of this particle size range and the proportion of clean coal in the fine particle size range less than 0.25mm is less than the clean coal particle size proportion threshold of this particle size range, it is determined that the top water volume is too large, and the top water is adjusted downward within the top water volume threshold until the proportion of clean coal falling into this particle size range is within the threshold range;

[0035] When the proportion of clean coal particle size in the coarse particle size range of 1 - 0.5mm is less than the clean coal particle size proportion threshold of this particle size range and the proportion of clean coal in the fine particle size range less than 0.25mm is greater than the clean coal particle size proportion threshold of this particle size range, it is determined that the top water volume is too small, and the top water is adjusted upward within the top water range until the proportion of clean coal falling into this particle size range is within the threshold range;

[0036] When the proportion of clean coal particle size in the coarse particle size range of 1 - 0.5mm or the proportion of clean coal in the fine particle size range less than 0.25mm is not within the threshold range, the top water volume is not adjusted.

[0037] Furthermore, adjusting the set density based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator includes:

[0038] Setting the clean coal ash content target value A1 or tail coal ash content target value A2 of the coarse coal slime separation system;

[0039] Setting the appropriate clean coal ash content A dj and the appropriate tail coal ash content A dw, where: A1 - Δ j ×A1 ≤ A dj ≤ A1 + Δ j ×A1, Δ j is the fluctuation threshold of clean coal ash content, A2 - Δ w ×A2 ≤ A dw ≤ A2 + Δ w ×A2, Δ w is the fluctuation threshold of tail coal ash content;

[0040] Compare the detected clean coal ash content value A j and the detected tail coal ash content value A w with the appropriate clean coal ash content of A dj and the appropriate tail coal ash content of A dw to judge the production organization mode at the same time;

[0041] In response to the production organization mode being to ensure clean coal, compare the detected clean coal ash content value A j with the preset appropriate clean coal ash content A dj If the clean coal ash content value Aj is greater than the preset appropriate clean coal ash content A dj , reduce the set density until it falls within the preset clean coal ash content threshold; if the clean coal ash content value A j is less than the preset appropriate clean coal ash content A dj , increase the set density until it falls within the preset clean coal ash content threshold;

[0042] In response to the production organization mode being to ensure tail coal, compare the detected tail coal ash content value A w with the preset appropriate tail coal ash content A dw If the tail coal ash content value A w is greater than the preset appropriate tail coal ash content threshold A dw , then continue to compare the detected clean coal ash content value A j with A dj If A j is within the threshold range, the set density remains unchanged, otherwise reduce the set density until it falls within the preset tail coal ash content threshold; if the tail coal ash content value A w is less than the preset appropriate tail coal ash content A dw , increase the set density until it falls within the preset tail coal ash content threshold.

[0043] In a second aspect, the present invention provides an automatic product quality control system for a coarse slime separation system, including:

[0044] Data acquisition module: acquire the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tail coal particle size of the interference bed separator, as well as the detected clean coal ash content value and the detected tail coal ash content value;

[0045] Return flow control module: Controls the return flow of the hydrocyclone group based on the real-time feed concentration value of the interference bed separator;

[0046] Top water volume setting module: Sets the top water volume of the interference bed separator based on the real-time feed particle size and feed flow rate of the interference bed separator;

[0047] Top water volume adjustment module: Adjusts the top water volume of the interference bed separator based on the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator;

[0048] Set density adjustment module: Adjusts the set density based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator.

[0049] In a third aspect, the present invention provides a product quality automatic control device for a coarse coal slime separation system, including a processor and a storage medium;

[0050] The storage medium is used to store instructions;

[0051] The processor is used to operate according to the instructions to execute the steps of the method according to any one of the above.

[0052] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method according to any one of the above are implemented.

[0053] Compared with the prior art, the beneficial effects achieved by the present invention:

[0054] First, the present invention proposes a method for automatic control of product quality in a coarse coal slime separation system, including controlling the feed concentration, controlling the clean coal yield, and controlling the clean coal ash content or tail coal ash content. It not only realizes the automatic adjustment of the separation parameters of the interference bed separator according to the feed concentration, feed flow rate, feed particle size, clean coal product particle size, tail coal product particle size, clean coal ash content, and tail coal ash content during the production process, but also can online adjust and stabilize the feed concentration of the interference bed separator. By this "feedforward + feedback" adjustment method, the coarse coal slime separation process is stabilized from the source, thereby stabilizing the product quality, and effectively solving the problem of untimely or imperfect production control;

[0055] Second, the present invention realizes the improvement of the production efficiency and separation accuracy of coarse coal slime separation, can dynamically adapt to raw material fluctuations, and the matching of separation accuracy and feed particle size is optimized; in addition, in terms of product quality and resource utilization rate, the maximization of clean coal yield and the controllability of tail coal ash content are realized; in terms of process stability and operation cost, the stability of the feed concentration of this solution is enhanced while energy consumption is saved. Through the advantages of intelligentization and operation and maintenance, manual intervention is reduced, data-driven optimization is realized, and at the same time, environmental and economic benefits are obtained. Description of the Drawings

[0056] The attached drawings forming a part of this invention are used to provide a further understanding of the invention. The schematic embodiments and descriptions thereof of the invention are used to explain the invention and shall not unduly limit the invention. In the drawings:

[0057] Figure 1 It is a schematic diagram of an automatic product quality control system for a coarse slime separation system provided in Embodiment 1 of the present invention;

[0058] Figure 2 It is a schematic flow diagram of an automatic product quality control method for a coarse slime separation system provided in Embodiment 2 of the present invention.

[0059] Figure 3 is Figure 2 a specific flow schematic diagram of S1 in;

[0060] Figure 4 is Figure 2 a specific flow schematic diagram of S2 in;

[0061] Figure 5 is Figure 2 a specific flow schematic diagram of S3 in;

[0062] Figure 6 is Figure 2 a specific flow schematic diagram of S4 in.

[0063] In the figure: 1. Slime water bucket; 2. Slime water pump; 3. Classification cyclone group; 4. Interference bed separator; 5. Top water bucket; 6. Top water pump; 7. First emergency discharge valve; 8. Inlet concentration meter of classification cyclone group; 9. Inlet flowmeter of classification cyclone group; 10. Inlet pressure detection table of classification cyclone group; 11. Overflow return flow regulating valve of classification cyclone group; 12. Bottom particle size detector of classification cyclone group; 13. Bottom concentration meter of classification cyclone group; 14. Bottom flowmeter of classification cyclone group; 15. Bottom return flow regulating valve of classification cyclone group; 16. Clean coal particle size detector of interference bed separator; 17. Clean coal ash content detector of interference bed separator; 18. Second emergency discharge valve; 19. Top water flowmeter; 20. Top water pressure detection table; 21. Tail coal discharge valve of interference bed separator; 22. Tail coal particle size detector of interference bed separator; 23. Tail coal ash content detector of interference bed separator; 24. Programmable logic controller; 25. Industrial control integrated machine. Detailed implementation manners

[0064] The present invention will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0065] The following detailed descriptions are all exemplary descriptions, aiming to provide further detailed explanations for the present invention. Unless otherwise specified, all technical terms adopted in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention pertains. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0066] Embodiment 1:

[0067] Please refer to Figure 1 , this embodiment provides a coarse slime separation system, including: a classification cyclone group 3, an interference bed separator 4, a top water pump 6, a classification cyclone group overflow return regulating valve 11, a classification cyclone group underflow particle size detector 12, a classification cyclone group underflow concentration meter 13, a classification cyclone group underflow return regulating valve 15, an interference bed separator clean coal particle size detector 16, an interference bed separator clean coal ash content detector 17, an interference bed separator 4 tail coal discharge valve, an interference bed separator tail coal particle size detector 22, an interference bed separator tail coal ash content detector 23, a programmable logic controller 24, and an industrial control computer 25; a coal slime water bucket 1 and a coal slime water pump 2 are provided upstream of the process of the classification cyclone group 3, the coal slime water bucket 1 and the coal slime water pump 2 are connected by a pipeline, and a first emergency discharge valve 7 is connected in the middle of the pipeline to facilitate shutdown maintenance; the classification cyclone group 3 is connected with a feed pipe, an underflow pipe, and an overflow pipe, the starting end of the feed pipe is connected to the outlet of the coal slime water pump 2, and the ending end of the underflow pipe is connected to the interference bed separator 4; the feed pipe is connected to a classification cyclone group feed concentration meter 8 and a classification cyclone group feed flow meter 9 through a pipeline;

[0068] In this embodiment, the feed pipeline is connected to a classification cyclone group feed pressure gauge 10 through a pipeline; the overflow pipe is connected to a classification cyclone group overflow return regulating valve 11 through a pipeline; the underflow pipe is connected to a classification cyclone group underflow particle size detector 12, a classification cyclone group underflow concentration meter 13, a classification cyclone group underflow flow meter 14, and a classification cyclone group underflow return regulating valve 15 through a pipeline; the interference bed separator 4 is connected with a feed pipe, a top water pipe, an overflow pipe, and an underflow pipe, the bottom of the interference bed separator 4 is connected with an interference bed separator tail coal discharge valve 21, and the discharge valve is integrally designed with the interference bed separator 4; the feed pipe is the underflow pipe of the classification cyclone group 3, the starting end of the feed pipe is the underflow port of the classification cyclone group 3, and the ending end is the inlet of the interference bed separator 4; the top water pipe is connected to a top water flow meter 19 and a top water pump 6 through a pipeline;

[0069] In this embodiment, the top water pipe is connected to the top water pressure detection meter 20 through a pipeline; the starting end of the overflow pipe is the overflow port of the interference bed separator 4, and is connected to the fine coal particle size detector 16 and the fine coal ash content detector 17 of the interference bed separator through a pipeline; the starting end of the underflow pipe is the underflow discharge port of the interference bed separator 4, and is connected to the tail coal particle size detector 22 and the tail coal ash content detector 23 of the interference bed separator through a pipeline; the top water pump 6 is connected to the top water bucket 5 through a pipeline, and a second accident discharge valve 18 is provided on the pipeline for convenient shutdown maintenance. The incoming material of the top water bucket 5 is generally the circulating water of the coal preparation plant; the slime water pump 2, the feed concentration meter 8 of the hydrocyclone group, the feed flow meter 9 of the hydrocyclone group, the feed pressure detection meter 10 of the hydrocyclone group, the overflow reflux regulating valve 11 of the hydrocyclone group, the underflow particle size detector 12 of the hydrocyclone group, the underflow concentration meter 13 of the hydrocyclone group, the underflow flow meter 14 of the hydrocyclone group, the underflow reflux regulating valve 15 of the hydrocyclone group, the fine coal particle size detector 16 of the interference bed separator, the fine coal ash content detector 17 of the interference bed separator, the top water flow meter 19, the top water pressure detection meter 20, the tail coal discharge valve 21 of the interference bed separator, the tail coal particle size detector 22 of the interference bed separator, and the tail coal ash content detector 23 of the interference bed separator are all connected by wire and connected to the programmable logic controller 24; the industrial control all-in-one computer 25 can simultaneously realize the access of detection data, the analysis of detection data, the execution of detection methods, the issuance of control instructions, and the front-end display;

[0070] In this embodiment, the programmable logic controller 24 uses a Programmable Logic Controller (PLC for short);

[0071] In this embodiment, the industrial control all-in-one computer 25 is connected to the PLC system through Ethernet, and the TCP / IP protocol is used for data transmission.

[0072] Please refer to Figure 2 This embodiment provides a method for automatic regulation of product quality in the coarse slime separation section of a coal preparation plant, including regulating the feed concentration, regulating the clean coal yield, and regulating the clean coal ash content or tail coal ash content, as follows:

[0073] S1. Set the optimal value and threshold of the feed concentration of the interference bed separator, and adjust the reflux flow according to the detected feed concentration value to stabilize the feed concentration of the interference bed separator within the threshold range;

[0074] S2. Set the top water volume of the interference bed separator according to the feed particle size and feed flow;

[0075] S3. Adjust the top water volume of the interference bed separator according to the feed particle size, clean coal particle size, and tail coal particle size, so as to adjust the clean coal particle size and / or tail coal particle size and the clean coal yield;

[0076] S4. Adjust the set density according to the detected real-time clean coal ash content and tail coal ash content, so as to adjust the clean coal ash content and / or tail coal ash content.

[0077] Please refer to Figure 3 , and the specific steps of S1 include:

[0078] S101. Set the optimal value and threshold of the feed concentration of the interference bed separator;

[0079] S102. Read the real-time feed concentration value of the interference bed separator;

[0080] S103. Compare it with the preset concentration threshold;

[0081] S104. According to the comparison result, judge the underflow or overflow reflux of the classification cyclone and control the reflux amount.

[0082] In this embodiment, the setting method of the concentration threshold of S103 is as follows:

[0083] Let the optimal feed concentration of the interference bed separator be x g / L, the actual feed concentration (i.e., the display value of the underflow concentration meter 13 of the classification cyclone group) be y g / L, and the allowable concentration fluctuation threshold be a g / L, then: In this embodiment, the comparison and control method of S104 is as follows:

[0084] When y is within the threshold range, both the underflow reflux regulating valve 15 of the classification cyclone group and the overflow reflux regulating valve 11 of the classification cyclone group remain normally closed and there is no action;

[0085] When y > x + a, the feed concentration is too high. Open the overflow reflux regulating valve 11 of the classification cyclone group to make a part of the overflow of the classification cyclone return to the slime water bucket 1, reduce the feed concentration of the classification cyclone group 3, and thus reduce the underflow of the classification cyclone group after concentration and classification by the classification cyclone group, that is, the feed concentration of the interference bed separator;

[0086] When y < x - a, the feed concentration is too low. Open the underflow reflux regulating valve 15 of the classification cyclone group to make a part of the underflow of the cyclone 3 return to the slime water bucket 1, increase the feed concentration of the classification cyclone group 3, and thus increase the underflow of the classification cyclone group after concentration and classification by the classification cyclone group, that is, the feed concentration of the interference bed separator;

[0087] In this embodiment, the calculation method for adjusting the opening degrees of the underflow reflux regulating valve and the overflow reflux regulating valve is to set the base value, upper limit and lower limit for the valve opening degree m (%), which are m0, and , respectively. During the reflux amount adjustment process, the valve opening degree is adjusted within the upper and lower limits, and the calculation formula is: , where k1 in the above formula is the calculated slope. During the reflux flow adjustment, the m0 values of the underflow reflux and the overflow reflux and the configured values can be different.

[0088] In this embodiment, to ensure that the actual passing amount of the coal slime water matches the treatment capacity of the coal slime water system, the upper limit and the lower limit of the feed concentration of the hydrocyclone group and the upper limit and the lower limit of the feed flow rate are set. The adjustment of the overflow reflux regulating valve 11 and the underflow reflux regulating valve 15 of the hydrocyclone group should ensure that the feed concentration displayed by the feed concentration meter 8 of the hydrocyclone group and the feed flow rate displayed by the feed flow meter 9 of the hydrocyclone group fluctuate within the threshold range;

[0089] In this embodiment, the programmable logic controller 24 automatically controls the number of opened cyclones in the hydrocyclone group according to the flow detection value of the feed flow meter 9 of the hydrocyclone group to adapt to the feed flow rate of the hydrocyclone group and ensure the classification effect of the hydrocyclone 3.

[0090] In this embodiment, when the feed concentration displayed by the feed concentration meter 8 of the hydrocyclone group is higher than the concentration upper limit , and the feed flow rate displayed by the feed flow meter 9 is within the threshold range, or the feed concentration displayed by the feed concentration meter 8 of the hydrocyclone group is within the threshold range, and the feed flow rate displayed by the feed flow meter 9 is lower than the feed flow rate lower limit , the overflow reflux regulating valve 11 or the underflow reflux regulating valve 15 of the hydrocyclone group is closed. When it still does not return to the threshold range after waiting for t1 time, the industrial control all-in-one machine 25 pushes a pop-up message to remind the upstream de-sludging link to increase the water spraying amount;

[0091] In this embodiment, when the feed concentration displayed by the feed concentration meter 8 of the hydrocyclone group is lower than the feed concentration lower limit , and the feed flow rate displayed by the feed flow meter 9 is within the threshold range, or the feed concentration displayed by the feed concentration meter 8 of the hydrocyclone group is within the threshold range, and the feed flow rate displayed by the feed flow meter 9 is higher than the feed flow rate upper limit , the overflow reflux regulating valve 11 or the underflow reflux regulating valve 15 of the hydrocyclone group is closed. When it still does not return to the threshold range after waiting for t1 time, the industrial control all-in-one machine 25 pushes a pop-up message to remind the upstream de-sludging link to reduce the water spraying amount.

[0092] Please refer to Figure 4 , and the specific steps of S2 include:

[0093] S201. Set the optimal values and thresholds of the feed particle size and feed flow rate of the interference bed separator;

[0094] S202. Read the real-time feed particle size and feed flow rate of the interference bed separator;

[0095] S203. Compare with the preset proportion of feed particle size and flow rate threshold;

[0096] S204. Set the top water volume (feedforward) of the interference bed separator according to the comparison result.

[0097] In this embodiment, the effective feed particle size of the interference bed separator in S201 is generally 1 - 0.25 mm, and the feed particle size is divided into four particle size grades: +1.0 mm oversize grade, 1 - 0.5 mm coarse particle size grade, 0.5 - 0.25 mm medium particle size grade, and -0.25 mm fine particle size grade. The optimal proportion and threshold of the preset feed particle size are as follows:

[0098] In the formula: is the 1 - 0.5 mm feed particle size grade, is the 0.5 - 0.25 mm feed particle size grade, is the feed particle size grade less than 0.25 mm.

[0099] Let the optimal value of the feed flow rate of the interference bed separator be Q0 m 3 / h, Q0 is matched with the diameter of the interference bed separator; the allowable flow fluctuation threshold is set to c m 3 / h, and the feed flow rate is Q 入 , then the appropriate feed flow rate: In this embodiment, in S202, read the feed flow rate of the interference bed separator (the detection value of the underflow concentration meter 13 of the classification cyclone group) and the feed particle size of the interference bed separator (the detection value of the underflow particle size detector 12 of the classification cyclone group);

[0100] In this embodiment, in S203 and S204, compare with the preset value in S201. If the proportion of the +1.0 mm oversize grade > z1, a pop-up message should be pushed on the industrial control integrated machine 25 to remind that "coarse particle running" has occurred in the upstream link; the control method for setting the top water volume is as follows. During the setting process, first execute based on the comparison result of the feed flow rate. After the execution is completed, further compare the feed particle size based on the current flow calculation value and execute according to the comparison result:

[0101] In the above table: Q d0 is the basic value of the top water volume, Q d1 is the calculated top water volume based on the flow comparison, and k2, k3, and k4 are the calculation coefficient two, calculation coefficient three, and calculation coefficient four for adjusting the top water volume, is the 1 - 0.5 mm feed particle size grade, is the feed particle size grade less than 0.25 mm.

[0102] Please refer to Figure 5 , and the specific steps of S3 are as follows:

[0103] S301. Set the mapping relationship between the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator;

[0104] S302. Read the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator detected in real time;

[0105] S303. Compare with the preset mapping relationship;

[0106] S304. Adjust the top water volume (feedback) of the interference bed separator according to the comparison relationship.

[0107] In this embodiment, for S301, the proportion of the feed particle size is z, the proportion of the clean coal particle size is z j , and the proportion of the tail coal particle size is z w . The theoretical distribution rate is η, and the particle size proportion threshold is Δ. The established mapping relationship between the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator is as follows: In this embodiment, the essence of the separation principle of the interference bed separator is to rely on the density difference of the feed for separation. The theoretical distribution rate is calculated based on the density composition of the feed of the interference bed separator. The distribution rate of each particle size level is different. Before the next density composition test data comes out, no matter whether the feed properties change or not, the calculation result of the previous time is always used;

[0108] The set particle size proportion thresholds Δ for different particle size levels are different, and it is more reasonable to set them in the range of 10% - 30%.

[0109] In this embodiment, during the separation process of the interference bed separator in S302, the focus is on the particle size proportions of the 1 - 0.5 mm coarse particles and - 0.25 mm fine particles detected by the clean coal particle size detector 16 and the tail coal particle size detector 22 of the interference bed separator.

[0110] In this embodiment, when comparing S303 and S304 with the mapping relationship of the above - mentioned particle size levels, the upper limit of the set top water volume is , and the lower limit is ;

[0111] If the proportion of the clean coal particle size of the 1 - 0.5 mm coarse particle size level detected is greater than the clean coal particle size proportion threshold of this particle size level and the proportion of the clean coal of the - 0.25 mm fine particle size level is less than the clean coal particle size proportion threshold of this particle size level, it indicates that the top water volume is too large. Then, lower the top water within the top water volume threshold until the proportion of the clean coal falling into this particle size level is within the threshold range;

[0112] If the proportion of clean coal with a particle size of 1 - 0.5 mm in the detected coarse particle size fraction is less than the threshold of the clean coal particle size proportion for this particle size fraction and the proportion of clean coal with a particle size of less than -0.25 mm in the fine particle size fraction is greater than the threshold of the clean coal particle size proportion for this particle size fraction, it indicates that the top water volume is too small. Then, increase the top water volume within the top water range until the proportion of clean coal falling within this particle size fraction reaches the threshold range;

[0113] If only the proportion of clean coal with a particle size of 1 - 0.5 mm in the coarse particle size fraction or the proportion of clean coal with a particle size of less than -0.25 mm in the fine particle size fraction is outside the threshold range, the top water volume will not be adjusted temporarily.

[0114] Please refer to Figure 6 , and the specific steps of S4 include:

[0115] S401. Set the target ash content of clean coal or the target ash content of tail coal in the coarse coal slime separation system;

[0116] S402. Set the threshold of clean coal ash content and the threshold of tail coal ash content during the production process based on the target ash content of clean coal or the target ash content of tail coal;

[0117] S403. Read the detected ash content of clean coal and the detected ash content of tail coal of the interference bed separator;

[0118] S404. Compare the detected ash content of clean coal and tail coal with the preset threshold of clean coal ash content and the threshold of tail coal ash content;

[0119] S405. Adjust the set density according to the comparison result.

[0120] In this embodiment, the target ash content of clean coal in S401 is A1, the target ash content of tail coal is A2, the appropriate clean coal ash content is A dj , and the tail coal ash content is A dw , then:

[0121] A1 - Δ j ×A1 ≤ A dj ≤ A1 + Δ j ×A1, where the fluctuation threshold of clean coal ash content Δ j is reasonably fluctuated within the range of 3% - 15%;

[0122] A2 - Δ w ×A2 ≤ A dw ≤ A2 + Δ w ×A2, where the fluctuation threshold of tail coal ash content Δ w is reasonably fluctuated within the range of 2% - 10%.

[0123] In this embodiment, S403 reads the on-line detected ash content A j of the clean coal ash content detector 17 of the interference bed separator and the on-line detected ash content A w of the tail coal ash content detector 23 of the interference bed separator;

[0124] In this embodiment, in S404 and S405, according to the production organization mode of the coal preparation plant, clarify that the production organization mode is "ensuring clean coal" or "ensuring tail coal", and the further comparison and adjustment methods are as follows:

[0125] If ensuring clean coal, then compare the detected clean coal ash content value A j with the preset appropriate clean coal ash content A dj If the clean coal ash content value Aj is greater than the preset appropriate clean coal ash content A dj , adjust the set density downward until it falls within the preset clean coal ash content threshold; if the clean coal ash content value A j is less than the preset appropriate clean coal ash content A dj , adjust the set density upward until it falls within the preset clean coal ash content threshold;

[0126] If ensuring tail coal, then compare the detected tail coal ash content value A w with the preset appropriate tail coal ash content A dw If the tail coal ash content value A w is greater than the preset appropriate tail coal ash content threshold A dw , then continue to compare the detected clean coal ash content value A j with A dj If A j is within the threshold range, the set density may not be adjusted; otherwise, adjust the set density downward until it falls within the preset tail coal ash content threshold; if the tail coal ash content value A w is less than the preset appropriate tail coal ash content A dw , adjust the set density upward until it falls within the preset tail coal ash content threshold.

[0127] In this embodiment, whether it is "ensuring clean coal" or "ensuring tail coal", after adjusting the top water once upward / downward or adjusting the set density once upward / downward, the online detection data should be read again and the comparison and judgment should be carried out again. If it falls within the preset threshold range, the adjustment ends; otherwise, the adjustment should continue until it finally falls within the preset threshold range.

[0128] The working process is as follows:

[0129] According to the density composition of the raw coal fed into the interference bed separator, each target clean coal ash content or target tail coal ash content corresponds to a theoretical separation density. Before the next density composition test data comes out, regardless of whether the feed properties change, the calculation result of the previous time should always be used; at the same time, if the target value of the clean coal ash content or the target value of the tail coal ash content is the same as that of the previous production shift, the set density and set top water volume of the previous production shift should be used; otherwise, the theoretical separation density and theoretical top water volume should be used.

[0130] Set a series of parameters before starting (if not reset, the previous set values will be used), including the optimal value and threshold of the feed concentration, the optimal value and threshold of the feed particle size and feed flow rate, the mapping relationship between the feed particle size, clean coal particle size and tailing coal particle size, the target value of clean coal ash or tailing coal ash, and the basic value, upper and lower limits of the valve opening, etc.

[0131] Remotely or locally start the interference bed separator 4. The slime water in the slime water bucket 1 is transported through the pipeline by the slime water pump 2 to the hydrocyclone group 3. After being concentrated and classified by the hydrocyclone group 3, the overflow flows by gravity through the pipeline to the fine slime treatment system, and the underflow is tangentially fed into the feed well of the interference bed separator 4. The circulating water in the top water bucket 5 is transported through the pipeline by the top water pump 6 to the lower part of the top water plate inside the interference bed separator 4 and forms an upward water flow. Under the action of the upward water flow and its own gravity, the feed forms an interference bed layer in the tank. Under the action of the upward water flow, the low-density particles move upward, overflow to the overflow tank and are discharged from the overflow port, and the high-density particles move downward and pass through the interference bed layer, concentrating at the bottom of the tank body and being discharged from the underflow port.

[0132] Call the optimal value and threshold of the feed concentration of the interference bed separator 4, read the detection data of the underflow concentration meter 13 of the hydrocyclone group, compare the results according to the preset method, and control the opening and closing of the overflow return flow regulating valve 11 or the underflow return flow regulating valve 15 of the hydrocyclone group to stabilize the feed concentration of the interference bed separator within the threshold range;

[0133] In the process of stabilizing the feed concentration of the interference bed separator 4 by adjusting the return flow rate, the real-time detection data of the feed concentration meter 8 and the feed flow meter 9 of the hydrocyclone group will be further read, and compared according to the preset method, and automatically execute to keep the opening of the overflow return flow regulating valve 11 or the underflow return flow regulating valve 15 unchanged or close the valve, automatically control the number of opened hydrocyclones in the hydrocyclone group or push a pop-up window on the industrial control integrated machine 25 to remind for manual intervention.

[0134] Call the optimal value and threshold of the feed particle size and feed flow rate of the interference bed separator 4, read the detection data of the underflow particle size detector 12 and the underflow flow meter 14 of the hydrocyclone group, compare the results according to the preset method, and stabilize the top water volume within the threshold range by adjusting the frequency of the top water pump 6.

[0135] Call the mapping relationship between the feed particle size of the interference bed separator 4, clean coal particle size and tailing coal particle size, read the detection data of the underflow particle size detector 12 of the hydrocyclone, the clean coal particle size detector 16 of the interference bed separator and the tailing coal particle size detector 22 of the interference bed separator, compare the results according to the preset mapping relationship, and stabilize the top water volume within the threshold range by adjusting the frequency of the top water pump 6.

[0136] According to the different production organization methods of coal preparation plants, the target ash content value of clean coal or the target ash content value of tail coal of the interference bed separator 4 is called, and the clean coal ash content threshold or the tail coal ash content threshold in the production process is set based on the target ash content value of clean coal or the target ash content value of tail coal. The detection data of the clean coal ash content detector 17 of the interference bed separator or the tail coal ash content detector 23 of the interference bed separator is compared with the preset clean coal ash content threshold or tail coal ash content threshold according to the preset method, and the set density is adjusted to stabilize the product index within the threshold range.

[0137] In this embodiment, during the production process, based on the detection data of the underflow particle size detector 12 of the hydrocyclone group, the underflow concentration meter 13 of the hydrocyclone group, the underflow flow meter 14 of the hydrocyclone group, the clean coal particle size detector 16 of the interference bed separator, the tail coal particle size detector 22 of the interference bed separator, the clean coal ash content detector 17 of the interference bed separator, and the tail coal ash content detector 23 of the interference bed separator, according to the preset algorithm, the regulation of single regulation or different combination methods including the regulation of the feed concentration, the regulation of the clean coal yield (clean coal particle size grade), and the regulation of the clean coal ash content or tail coal ash content will be automatically triggered and executed.

[0138] In this embodiment, after all the above operations are executed, a re-judgment will be made according to the preset comparison algorithm. If the threshold range is not reached, it will be adjusted again until the preset index reaches within the threshold.

[0139] Embodiment 2:

[0140] A product quality automatic regulation system for a coarse coal slime separation system, which can implement the product quality automatic regulation method of a coarse coal slime separation system described in Embodiment 1, includes:

[0141] Data acquisition module: Acquire the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size, and tail coal particle size of the interference bed separator, as well as the clean coal ash content detection value and the tail coal ash content detection value;

[0142] Return flow control module: Control the return flow of the hydrocyclone group based on the real-time feed concentration value of the interference bed separator;

[0143] Top water volume setting module: Set the top water volume of the interference bed separator based on the real-time feed particle size and feed flow rate of the interference bed separator;

[0144] Top water volume adjustment module: Adjust the top water volume of the interference bed separator based on the feed particle size, clean coal particle size, and tail coal particle size of the interference bed separator;

[0145] Set density adjustment module: Adjust the set density based on the clean coal ash content detection value and the tail coal ash content detection value of the interference bed separator.

[0146] Embodiment 3:

[0147] The embodiment of the present invention also provides an automatic product quality control device for a coarse slime separation system, which can implement the automatic product quality control method for a coarse slime separation system described in Embodiment 1, including a processor and a storage medium;

[0148] The storage medium is used to store instructions;

[0149] The processor is used to operate according to the instructions to execute the steps of the following method:

[0150] Obtain the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tailing coal particle size of the interference bed separator, as well as the clean coal ash content detection value and tailing coal ash content detection value;

[0151] Based on the real-time feed concentration value of the interference bed separator, control the reflux flow rate of the hydrocyclone group;

[0152] Based on the real-time feed particle size and feed flow rate of the interference bed separator, set the top water volume of the interference bed separator;

[0153] Based on the feed particle size, clean coal particle size and tailing coal particle size of the interference bed separator, adjust the top water volume of the interference bed separator;

[0154] Based on the clean coal ash content detection value and tailing coal ash content detection value of the interference bed separator, adjust the set density.

[0155] Embodiment 4:

[0156] The embodiment of the present invention also provides a computer-readable storage medium, which can implement the automatic product quality control method for a coarse slime separation system described in Embodiment 1. A computer program is stored thereon, and when the program is executed by a processor, the steps of the following method are implemented:

[0157] Obtain the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tailing coal particle size of the interference bed separator, as well as the clean coal ash content detection value and tailing coal ash content detection value;

[0158] Based on the real-time feed concentration value of the interference bed separator, control the reflux flow rate of the hydrocyclone group;

[0159] Based on the real-time feed particle size and feed flow rate of the interference bed separator, set the top water volume of the interference bed separator;

[0160] Based on the feed particle size, clean coal particle size and tailing coal particle size of the interference bed separator, adjust the top water volume of the interference bed separator;

[0161] Based on the clean coal ash content detection value and tailing coal ash content detection value of the interference bed separator, adjust the set density.

[0162] As is known by common technical knowledge, the present invention can be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

[0163] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0164] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0165] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0166] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific implementation manners of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. An automatic control method for product quality of a coarse slime separation system, characterized in that Including: Obtain the real-time feed concentration value, real-time feed particle size, feed flow rate, clean coal particle size and tail coal particle size of the interference bed separator, as well as the clean coal ash content detection value and tail coal ash content detection value; Based on the real-time feed concentration value of the interference bed separator, perform reflux flow control on the hydrocyclone group, including: Set the feed concentration range of the interference bed separator. The feed pipe of the interference bed separator is the underflow pipe of the hydrocyclone group, and a slime water bucket is provided upstream of the process of the hydrocyclone group; Compare the real-time feed concentration value of the interference bed separator with the feed concentration range; In response to the real-time feed concentration value of the interference bed separator being within the feed concentration range, control both the underflow reflux regulating valve and the overflow reflux regulating valve of the hydrocyclone group to remain in the normally closed state; In response to the real-time feed concentration value of the interference bed separator being higher than the feed concentration range, open the overflow reflux regulating valve of the hydrocyclone group, so that a part of the overflow of the hydrocyclone returns to the slime water bucket, reducing the feed concentration of the hydrocyclone group, thereby reducing the feed concentration of the interference bed separator; In response to the real-time feed concentration value of the interference bed separator being lower than the feed concentration range, open the underflow reflux regulating valve of the hydrocyclone group, so that a part of the underflow of the hydrocyclone returns to the slime water bucket, increasing the feed concentration of the hydrocyclone group, thereby increasing the feed concentration of the interference bed separator; Based on the real-time feed particle size and feed flow rate of the interference bed separator, set the top water volume of the interference bed separator; Based on the feed particle size, clean coal particle size and tail coal particle size of the interference bed separator, adjust the top water volume of the interference bed separator; Based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator, adjust the set density.

2. The automatic regulation method for the product quality of the coarse slime separation system according to claim 1, characterized in that, The opening adjustment calculation method of the underflow reflux regulating valve and the overflow reflux regulating valve of the hydrocyclone group is: set the basic value, upper limit and lower limit for the valve opening. During the reflux flow adjustment process, the valve opening is adjusted within the upper and lower limits. The calculation formula is: m = m0 + k1×|y - x| Where: m is the valve opening, m0 is the basic value of the valve opening, m 上 is the upper limit of the valve opening, m 下 is the lower limit of the valve opening, k1 is the calculation slope, y is the actual feed concentration of the interference bed separator, and x is the optimal feed concentration of the interference bed separator.

3. The automatic product quality control method for the coarse slime separation system according to claim 2, characterized in that During the process of adjusting the valve opening: In response to the feed concentration of the hydrocyclone group being higher than the preset upper limit or the feed flow rate being lower than the preset lower limit, close the overflow reflux regulating valve and the underflow reflux regulating valve of the hydrocyclone group, and when it still does not return to the threshold range after waiting for the set time, push a pop-up message to remind the upstream desliming link to increase the water spraying amount; In response to the feed concentration of the hydrocyclone group being lower than the preset lower limit or the feed flow rate being higher than the preset upper limit, close the overflow reflux regulating valve and the underflow reflux regulating valve of the hydrocyclone group, and when it still does not return to the threshold range after waiting for the set time, push a pop-up message to remind the upstream desliming link to reduce the water spraying amount; The number of opened cyclones in the hydrocyclone group is automatically controlled according to the real-time feed concentration and feed flow rate of the hydrocyclone group to adapt to the feed flow rate of the hydrocyclone group.

4. The automatic regulation method for the product quality of the coarse slime separation system according to claim 1, characterized in that, Based on the real-time feed particle size and feed flow rate of the interference bed separator, setting the top water volume of the interference bed separator includes: Set the threshold range of the feed particle size and feed flow rate of the interference bed separator; Compare the real-time feed particle size and feed flow rate of the interference bed separator with the threshold range; When the incoming material flow rate is within the threshold range, set the top water volume to the base value; When the incoming material flow rate exceeds the threshold range, set the top water volume to Q d0 + k2 × (Q 入 - Q0), where Q d0 is the basic value of the top water volume, k2 is the calculation coefficient two for adjusting the top water volume, and Q 入 is the incoming material flow rate, and Q0 is the optimal value of the incoming material flow rate of the interference bed separator; When the feed particle size of 1 - 0.5 mm exceeds the threshold range, set the top water volume to Q d1 + k3×(z 1-0.5mm - z2), Q d1 is the calculated top water volume based on flow comparison, k3 is the calculation coefficient three for top water volume adjustment, z 1-0.5mm is the feed particle size of 1 - 0.5 mm, and z2 is the optimal proportion at the particle size of 1 - 0.5 mm; When the feed particle size less than 0.25mm exceeds the threshold range, set the top water volume to Q d1 -k4×(z -0.25mm -z4), Q d1 is the calculated top water volume based on flow comparison, k4 is the calculation coefficient four for top water volume adjustment, z -0.25mm is the feed particle size less than 0.25mm, and z4 is the optimal proportion at the particle size less than 0.25mm.

5. The automatic regulation method for the product quality of the coarse slime separation system according to claim 1, characterized in that, Adjust the top water volume of the interference bed separator based on the incoming material particle size grade, clean coal particle size grade, and tail coal particle size grade of the interference bed separator, including: Set the mapping relationship between the incoming material particle size grade, clean coal particle size grade, and tail coal particle size grade of the interference bed separator; Compare the incoming material particle size grade, clean coal particle size grade, and tail coal particle size grade of the interference bed separator with the preset mapping relationship; When the proportion of clean coal particle size in the 1 - 0.5mm coarse particle size grade is greater than the clean coal particle size proportion threshold of this particle size grade and less than the proportion of clean coal in the 0.25mm fine particle size grade is less than the clean coal particle size proportion threshold of this particle size grade, it is determined that the top water volume is too large, and the top water is adjusted downward within the top water volume threshold until the proportion of clean coal particle size falling into this particle size grade is within the threshold range; When the proportion of clean coal particle size in the 1 - 0.5mm coarse particle size grade is less than the clean coal particle size proportion threshold of this particle size grade and the proportion of clean coal in the 0.25mm fine particle size grade is greater than the clean coal particle size proportion threshold of this particle size grade, it is determined that the top water volume is too small, and the top water is adjusted upward within the top water range until the proportion of clean coal particle size falling into this particle size grade is within the threshold range; When the proportion of clean coal particle size in the 1 - 0.5mm coarse particle size grade or the proportion of clean coal in the 0.25mm fine particle size grade is not within the threshold range, do not adjust the top water volume.

6. The automatic regulation method for the product quality of the coarse slime separation system according to claim 1, characterized in that, Adjust the set density based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator, including: Set the clean coal ash content target value A1 or tail coal ash content target value A2 of the coarse coal slime separation system; Set the appropriate clean coal ash content A and tail coal ash content A during the production process based on the clean coal ash target value A1 or the tail coal ash target value A2 dj and the appropriate tail coal ash content A dw , where: A1 - Δ j ×A1 ≤ A dj ≤ A1 + Δ j ×A1, Δ j is the clean coal ash fluctuation threshold, A2 - Δ w ×A2 ≤ A dw ≤ A2 + Δ w ×A2, Δ w is the tail coal ash fluctuation threshold; Compare the measured clean coal ash content A j with the measured tailing coal ash content A w against the appropriate clean coal ash content A dj and the appropriate tailing coal ash content A dw to determine the production organization method; In response to the production organization mode being clean coal, the detected clean coal ash content value A j is compared with the preset appropriate clean coal ash content A dj . If the clean coal ash content value Aj is greater than the preset appropriate clean coal ash content A dj , the set density is adjusted downwards until it falls within the preset clean coal ash content threshold; if the clean coal ash content value A j is less than the preset appropriate clean coal ash content A dj , the set density is adjusted upwards until it falls within the preset clean coal ash content threshold; When the production organization mode is tail coal preservation, the detected tail coal ash content value A w is compared with the preset appropriate tail coal ash content A dw . If the tail coal ash content value A w is greater than the preset appropriate tail coal ash content threshold A dw , then the detected clean coal ash content value A j is compared with A dj . If A j is within the threshold range, the set density is not adjusted; otherwise, the set density is reduced until it falls within the preset tail coal ash content threshold. If the tail coal ash content value A w is less than the preset appropriate tail coal ash content A dw , the set density is increased until it falls within the preset tail coal ash content threshold.

7. An automatic product quality control system for a coarse slime separation system, characterized in that, A method for automatic regulation of product quality of a coarse coal slime separation system according to claim 1, including: Data acquisition module: Acquire the real-time incoming material concentration value, real-time incoming material particle size grade, incoming material flow rate, clean coal particle size grade, and tail coal particle size grade of the interference bed separator, as well as the clean coal ash content detection value and tail coal ash content detection value; Return flow control module: Control the return flow of the classification cyclone group based on the real-time incoming material concentration value of the interference bed separator; Top water volume setting module: Set the top water volume of the interference bed separator based on the real-time incoming material particle size grade and incoming material flow rate of the interference bed separator; Top water volume adjustment module: Adjust the top water volume of the interference bed separator based on the incoming material particle size grade, clean coal particle size grade, and tail coal particle size grade of the interference bed separator; Set density adjustment module: Adjust the set density based on the clean coal ash content detection value and tail coal ash content detection value of the interference bed separator.

8. An automatic control device for the product quality of a coarse slime separation system, characterized in that, Including a processor and a storage medium; The storage medium is used to store instructions; The processor is used to operate according to the instructions to execute the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 6.

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