An integrated control system for associated equipment used in coal-water slurry preparation

Abstract

The present invention relates to an equipment control system, and specifically to an integrated control system for associated equipment used in the preparation of water-coal slurry, which at least includes: a crushing component, a screening component, a ball mill component, and also includes: a coal mine analysis module, a crushing monitoring module, a ball mill detection module, and a general control analysis module. The present invention can calculate the roller skin wear value used to judge the roller skin durability of the crusher and the steel ball wear value used to judge the loss of the steel ball, and by setting the corresponding wear threshold and comparing it with the wear value, an abnormal signal is generated in time and sent to the staff, which can help the staff understand the abnormal wear of the corresponding components, so as to replace or adjust them in time, reduce the subsequent impact caused by the abnormal wear, and then improve the overall efficiency of the preparation process. Compared with manual regular disassembly and inspection, it is more convenient and direct, and the general control analysis module can monitor multiple devices as a whole, which is more efficient.

Description

Technical Field

[0001] The invention relates to an equipment control system, and in particular to an integrated control system for associated equipment used in preparing water-coal slurry. Background Art

[0002] Coal-water slurry is a new type of coal-based fluid clean and environmentally friendly fuel. It not only retains the combustion characteristics of coal, but also has the liquid combustion application characteristics similar to heavy oil. It is currently a realistic clean coal technology in my country. It is made of 65-70% coal, 29-34% water and less than 1% chemical additives through a certain processing technology. It looks like oil, has good fluidity, is stable in storage (generally no precipitation for 3-6 months), is easy to transport (train or tank car, pipeline, ship), has high combustion efficiency, and has low pollutant (SO2, Nox) emissions. About 2 tons of coal-water slurry can replace 1 ton of fuel oil, and can be used in industrial boilers, power station boilers and industrial kilns instead of oil or coal and gas.

[0003] The key to the preparation of water-coal slurry lies in the manufacture of coal powder and the preparation of water-coal slurry, and the manufacture of coal powder depends on the efficiency of coal powder processing equipment. At present, the processing and preparation of coal powder usually includes crushing, grinding and other processing steps. The equipment required includes gear roller crusher, ball mill, etc., and since crushing and grinding consume a lot of equipment, it is necessary to replace the wearing parts in the processing equipment regularly. In the prior art, manual disassembly and inspection are generally adopted to detect the wear of wearing parts in the processing equipment, or wearing parts are replaced regularly to ensure the operation efficiency of the equipment. There is a lack of control system that can intelligently analyze the wear of wearing parts in the equipment, which makes it easy for maintenance and replacement to be untimely, and there are certain defects. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an integrated control system for associated equipment for water-coal slurry preparation, which can effectively solve the problem in the prior art that it is difficult to analyze the wear condition of wearing parts in coal powder processing equipment without disassembly and inspection.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides an integrated control system for associated equipment for preparing water-coal slurry, which at least includes: a crushing component, a screening component, a ball mill component, and also includes: a coal mine analysis module, a crushing monitoring module, a ball mill detection module, and a general control analysis module;

[0007] Coal mine analysis module: The coal mine analysis module analyzes the initial coal mine raw materials used to prepare water-coal slurry from multiple angles, calculates the grindability index, purity value, density value, unit calorific value and sulfur content index of the coal mine, and determines the quality index and processability index of the coal mine based on the above data;

[0008] The crushing monitoring module monitors the status of the crusher. By recording and analyzing the materials produced by the crusher and combining the use time of the crusher, it calculates the roller wear value used to judge the durability of the crusher's roller skin;

[0009] The ball mill detection module analyzes and determines the wear state of the steel balls in the ball mill according to the processability index of the raw materials processed each time and the use record of the ball mill, and obtains the steel ball wear value used to judge the steel ball loss situation;

[0010] The general control analysis module has a preset quality threshold. When the quality index is lower than the quality threshold, an unqualified ore signal is generated. The steel ball wear threshold and roller skin wear threshold are preset. The steel ball wear value and roller skin wear value are compared with the corresponding steel ball wear threshold and roller skin wear threshold respectively. When any wear value is greater than or equal to the corresponding wear threshold, an abnormal wear signal is generated and the corresponding abnormal wear value is displayed.

[0011] Furthermore, a sampling weight M is preset, and a raw material sample with a weight of M is extracted from the coal mine raw material. The raw material sample is fully crushed to make a particle sample, and sampling is carried out using the nine-point sampling method. The nine-point samples obtained are tested in batches. Batch testing refers to dividing the nine-point samples into multiple parts and then testing them separately. Each test is only performed on a certain data, and the grindability index, purity value, density value, unit calorific value and sulfur content index of the nine-point samples are calculated respectively.

[0012] Further, the purity value P is obtained CD , density value ρ′, unit calorific value Q gr,ad And sulfur content index S DBST , for the purity value P CD , density value ρ′, sulfur content index S DBST After normalization, enter the formula The quality index ω is calculated 3 , where λ 1 , 2 , k are the preset weight coefficients, and ρ″, P C ' D , S′ DBST ,ω 2 ′ are the preset density threshold, purity threshold, sulfur content threshold, and unit heating threshold, respectively, ω 1 ,ω 2 is the middle value, H ad 、M ad They represent the hydrogen content and moisture content of the coal sample respectively.

[0013] Furthermore, the process of calculating the machinability index is as follows:

[0014] Grindability index U km, purity value P CD , density value ρ′ is normalized and then put into the formula Calculate and get the processability index U jg , where η 1 , η 2 , η 3 is the preset weight coefficient, and R is the preset compensation factor.

[0015] Furthermore, an intermittent feed hopper is provided between the conveyor belt and the crusher. The coal mine particles on the conveyor belt are recorded as coarse particles. The coarse particles first fall into the intermittent feed hopper, and then are released into the crusher by the intermittent feed hopper at regular intervals. The total mass of the coarse particles in the intermittent feed hopper is recorded before each release.

[0016] Furthermore, the roller skin wear value calculation process is as follows:

[0017] The total mass of coarse particles in the intermittent feed hopper measured each time is recorded as the single mass. All single masses in a complete crushing process are recorded and a line graph of the change of each recorded single mass over time is drawn. The sum of all single masses in a complete crushing process is calculated and recorded as the total return weight G. all，1 The total amount of coal raw materials in a complete crushing process is recorded as the total crushing weight G all，2 , substitute into the formula Calculate the first evaluation index JP 1 , where μ 1 , μ 2 is the preset weight coefficient, T 1 It is the time for the coal mine to continue running after the raw material loading is completed. The calculation formula is T 1 =T all -T 2 , where T all is the total duration of a complete crushing process, T 2 The total time required to complete the uniform feeding of coal mine raw materials;

[0018] Set a range analysis interval [(t-0.25T all ), (t+0.25T all )], where t is the midpoint of the time axis range in the time variation line graph, and the variance of all single masses within the calculation range analysis interval is recorded as Substitute into the formula Calculate and get the second evaluation index JP 2 , the first evaluation index JP 1 , the second valuation index JP 2 and the usage time T of the current roller skin of the crusher, substitute into the formula JP′=β 1 *JP 1 +β2 *JP 2 +β 3 *T, and the roller wear value JP' is obtained, where β 1 , β 2 , β 3 is the preset weight coefficient.

[0019] Furthermore, the calculation process of the steel ball wear value is as follows:

[0020] Get the used cycle interval of the steel balls in the ball mill, calculate the duration of the used cycle interval and record it as the steel ball use time DT, count the total number of complete crushing processes in the used cycle interval and record it as the steel ball use times NUM, each complete crushing process corresponds to a batch of coal raw materials, get the processability index of each batch of coal raw materials, substitute the processability index of each batch of coal raw materials in the used cycle interval into the formula Calculate the wear impact value U ms , where U j ' g For the preset wear setting value, the average value of all wear influence values ​​is calculated and recorded as the wear index Wear Index Substitute the steel ball usage time DT and the number of times the steel ball is used NUM into the formula The calculation is performed to obtain the steel ball wear value IR, where α 1 , α 2 , α 3 is the preset weight coefficient.

[0021] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0022] 1. The coal mine analysis module of the present invention can determine the quality index and processability index of the coal mine according to the grindability index, purity value, density value, unit calorific value and sulfur content index of the coal mine. The quality index can help the staff to further judge the quality level of the coal mine raw materials, and through the side evaluation of the processability of the coal mine raw materials used to prepare the water-coal slurry, further extract the characteristic data for analysis and screening on the basis of the existing material selection technology, eliminate the coal mine raw materials with substandard quality and no processing prospects, and avoid unnecessary losses.

[0023] 2. The crushing monitoring module and the ball mill detection module of the present invention can respectively calculate the roller wear value for judging the roller durability of the crusher and the steel ball wear value for judging the loss of the steel balls, so that the staff can understand the wear of the components in the equipment. By setting the corresponding wear threshold and comparing it with the wear value, an abnormal signal is generated in time and sent to the staff, which can help the staff understand the abnormal wear of the corresponding components, so as to replace or adjust them in time, reduce the subsequent impact caused by the abnormal wear, and thus improve the overall efficiency of the preparation process. Compared with manual regular disassembly and inspection, it is more convenient and direct.

[0024] 3. The master control analysis module in the present invention can not only evaluate and screen the quality of the initial coal mine raw materials, but also monitor multiple values ​​at the same time, and then generate different types of adjustment signals according to the abnormalities of different values. This helps the staff to understand the feeding conditions of multiple processing equipment and the defects of components inside the equipment through the same master control device, which is conducive to saving human resource costs, facilitating the overall management of multiple equipment, and improving the efficiency of equipment integration control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is the overall module block diagram of the present invention;

[0027] Figure 2 This is a diagram of the steps for preparing water-coal slurry. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] See also Figure 1 , Figure 2, an integrated control system for associated equipment used in water-coal slurry preparation, at least including: a crushing component, a screening component, a ball mill component, and also including: a coal mine analysis module, a crushing monitoring module, a ball mill detection module, and a general control analysis module.

[0031] The crushing component crushes the large coal raw materials into small coal particles through the crusher, and then screens out the coal particles suitable for ball milling by the ball mill component through the screening component, and re-inputs the remaining particles that are not suitable for ball milling into the crusher through the conveyor belt for further crushing;

[0032] The coal ore particles are mixed with water and ball-milled into a coal slurry with a certain concentration ratio through a ball mill component, and the coal slurry is then filtered through a screening component to obtain a coal slurry that meets the requirements, and the coal slurry that does not meet the requirements is re-input into the ball mill component for further ball milling;

[0033] The coal slurry that meets the requirements is further mixed and ground with additives in a certain proportion to form a uniform and stable water-coal slurry that meets the standards.

[0034] Coal mine analysis module: The coal mine analysis module analyzes the initial coal mine raw materials used to prepare water-coal slurry from multiple angles, calculates the grindability index, purity value, density value, unit calorific value and sulfur content index (i.e. dry basis total sulfur index) of the coal mine, and determines the quality index and processability index of the coal mine based on the above data;

[0035] Specifically, a sampling weight M is preset, a raw material sample with a weight of M is extracted from the coal mine raw material, the raw material sample is fully crushed to make a particle sample, and the nine-point sampling method is used for sampling. The nine-point samples obtained are tested in batches. Batch testing means that the nine-point samples are evenly divided into multiple parts and then tested separately. Each test is only performed on a certain data, and the grindability index, purity value, density value, unit calorific value and sulfur content index of the nine-point samples are calculated respectively;

[0036] Among them, the grindability index is measured by the Hardgrove method (the higher the grindability index, the higher the grindability of the coal), the purity value is the ash percentage, the unit calorific value is the heat generated when the unit mass of coal is completely burned, the sulfur content index is the total sulfur content measured after removing the water in the sample, and the density value refers to the density value of the water-insoluble substance in the nine-point sample;

[0037] Get the purity value P CD , density value ρ′, unit calorific value Q gr,ad And sulfur content index S DBST , for the purity value P CD , density value ρ′, sulfur content index S DBST After normalization, enter the formula The quality index ω is calculated3 , where λ 1 , 2 , k are the preset weight coefficients, and ρ″, P C ' D , S′ DBST ,ω 2 ′ are the preset density threshold, purity threshold, sulfur content threshold, and unit heat threshold (set by the staff according to the standard coal source data value), ω 1 ,ω 2 is the intermediate value (for the convenience of intermediate calculation of the formula), H ad 、M ad Respectively represent the hydrogen content and moisture content of coal samples. The master control analysis module is preset with a quality threshold ω 3 ′, when the quality index is lower than the quality threshold, a signal of unqualified ore source is generated, otherwise, the processability index is calculated;

[0038] Grindability index U km , purity value P CD , density value ρ′ is normalized and then put into the formula Calculate and get the processability index U jg , where η 1 , η 2 , η 3 is the preset weight coefficient, R is the preset compensation factor (to ensure that the denominator in the formula is not 0), and the processability index reflects the difficulty of processing the coal mine raw material in the subsequent process of preparing water-coal slurry. The higher the processing index, the easier it is for the raw material to be processed into water-coal slurry, which is convenient for the staff to judge whether the raw material is suitable for processing.

[0039] It should be noted that the coal mine analysis module is not exclusive of coal procurement and coal processing. That is to say, its function is to verify the key quality parameters of coal raw materials before processing, so as to control the content of harmful elements in the processed coal slurry and ensure the smooth progress of the processing. That is, the coal mine analysis module is designed to serve the process of preparing water-coal slurry, rather than the overall assessment and screening of coal quality. Compared with the raw material screening and evaluation technology in the prior art, it can conduct a side assessment of the machinability of coal raw materials used to prepare water-coal slurry, and then eliminate coal raw materials that have no processing prospects to avoid unnecessary losses.

[0040] The crushing monitoring module monitors the status of the crusher. By recording and analyzing the materials produced by the crusher and combining the use time of the crusher, the roller wear value used to judge the durability of the crusher's roller skin is calculated. The specific analysis process is as follows:

[0041] An intermittent feed hopper is provided between the conveyor belt and the crusher. The coal particles on the conveyor belt are recorded as coarse particles. The coarse particles first fall into the intermittent feed hopper, and then are released into the crusher by the intermittent feed hopper at regular intervals. The total mass of the coarse particles in the intermittent feed hopper is recorded before each release.

[0042] By setting up an intermittent feeding hopper, the continuous feeding of the conveyor belt can be adjusted to intermittent feeding, so that the intermittent feeding hopper can periodically obtain the weight of the coarse particles entering the crusher. The reason for the generation of coarse particles is that the crusher does not completely crush the coal blocks. Therefore, by performing a time series analysis on the quality of the coarse particles generated, it can be used to monitor the defects of the roller skin in the crusher, because the wear of the roller skin will directly affect the crushing efficiency and the quality of the finished product, so it is easy for the staff to find the wear of the roller skin and replace it as soon as possible;

[0043] The total mass of coarse particles in the intermittent feed hopper measured each time is recorded as a single mass. All single masses in a complete crushing process are recorded and a line graph of the change of each recorded single mass over time is drawn. A complete crushing process refers to the process of crushing all the prepared coal raw materials (the total amount of coal raw materials before each crushing is fixed). The sum of all single masses in a complete crushing process is calculated and recorded as the total return weight G. all，1 The total amount of coal raw materials in a complete crushing process is recorded as the total crushing weight G all，2 , substitute into the formula Calculate the first evaluation index JP 1 , where μ 1 , μ 2 is the preset weight coefficient, T 1 It is the time for the coal mine to continue running after the raw material loading is completed. The calculation formula is T 1 =T all -T 2 , where T all is the total duration of a complete crushing process, T 2 It is the total time required for uniform feeding of coal raw materials (here, feeding only refers to the feeding of coal raw materials but does not include the feeding of coarse particles). After the feeding of coal raw materials is completed, the crusher generally does not stop immediately, but waits until all coarse particles are crushed and no more coarse particles are generated before stopping. The duration of this stage is related to the crushing efficiency of the crusher.

[0044] Set a range analysis interval [(t-0.25T all ), (t+0.25T all )], where t is the midpoint of the time axis range in the time variation line graph, and the variance of all single masses within the calculation range analysis interval is recorded as Substitute into the formula Calculate and get the second evaluation index JP2 , the first evaluation index JP 1 , the second valuation index JP 2 and the current roller skin usage time T of the crusher (the time the roller skin of the crusher has been put into use, in months), substitute into the formula JP' = β 1 *JP 1 +β 2 *JP 2 +β 3 *T, and the roller wear value JP' is obtained, where β 1 , β 2 , β 3 is the preset weight coefficient.

[0045] The roller wear value is affected by the crushing efficiency, crushing effect and usage time of the crusher. When the crushing efficiency decreases or the crushing effect is unstable, the roller wear value will increase significantly. The calculated roller wear value can help staff to promptly detect abnormal wear of the roller in the crusher, so as to replace the roller in time, improve the crushing efficiency and ensure the crushing effect. Compared with regular replacement, it can avoid incomplete crushing caused by excessive use of the roller, and can effectively avoid abnormal crusher load caused by roller wear.

[0046] The ball mill detection module analyzes and determines the wear status of the steel balls in the ball mill according to the processability index of each raw material and the use record of the ball mill, and obtains the steel ball wear value used to judge the steel ball loss. The specific analysis process is as follows:

[0047] Obtain the used cycle interval of the steel balls in the ball mill (i.e., the time interval from the beginning of the use of the steel balls to the current time interval), calculate the duration of the used cycle interval and record it as the steel ball use time DT, count the total number of complete crushing processes in the used cycle interval and record it as the steel ball use times NUM, each complete crushing process corresponds to a batch of coal raw materials, obtain the processability index of each batch of coal raw materials, and substitute the processability index of each batch of coal raw materials in the used cycle interval into the formula Calculate the wear impact value U ms , where U j ' g is the preset wear setting value. When the machinability index is higher than the preset wear setting value, it can be considered that the steel balls in the ball mill are at normal wear speed. The average value of all wear impact values ​​is calculated and recorded as the wear index. Wear Index Substitute the steel ball usage time DT and the number of times the steel ball is used NUM into the formula The calculation is performed to obtain the steel ball wear value IR, where α 1 , α 2 , α 3is the preset weight coefficient.

[0048] The steel ball wear value is affected by the time and number of times the steel balls in the ball mill have been used, as well as the properties of the materials used in each ball milling. When the difficulty of grinding coal decreases or the time and number of times of use increase, the steel ball wear value will increase significantly. The calculated steel ball wear value can help staff determine the wear of the steel balls in the ball mill, estimate the defects of the steel balls and replace the steel balls in time, thereby improving the grinding efficiency of the ball mill. Compared with disassembling to check the status of the steel balls, it saves time and effort, and effectively reduces the number of shutdowns for inspections.

[0049] The master control analysis module is preset with steel ball wear threshold and roller skin wear threshold, and the steel ball wear value and roller skin wear value are compared with the corresponding steel ball wear threshold and roller skin wear threshold respectively. When any wear value is greater than or equal to the corresponding wear threshold, an abnormal wear signal is generated, and the corresponding abnormal wear value is displayed, and the staff replaces the equipment component corresponding to the abnormal wear value. For example, when the steel ball wear value is greater than the steel ball wear threshold, an abnormal wear signal is generated, and the corresponding steel ball wear value is displayed, and the staff replaces the steel balls in the ball mill.

[0050] By setting the corresponding wear threshold and comparing it with the wear value, abnormal signals are generated in time and sent to the staff, which can help the staff understand the abnormal wear of the corresponding components, so that they can replace or adjust them in time, reduce the subsequent impact caused by abnormal wear, and thus improve the overall efficiency of the preparation process. Compared with manual regular disassembly and inspection, it is more convenient and direct.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated control system for associated equipment for preparing water-coal slurry, comprising a crushing component, a screening component, and a ball mill component, characterized in that: Also includes: Coal mine analysis module, crushing monitoring module, ball mill detection module, general control analysis module; Coal mine analysis module: The coal mine analysis module analyzes the initial coal mine raw materials used to prepare water-coal slurry from multiple angles, calculates the grindability index, purity value, density value, unit calorific value and sulfur content index of the coal mine, and determines the quality index and processability index of the coal mine based on the data; The process of calculating the processability index is as follows: Grindability index U km , purity value P CD , density value ρ′ is normalized and then put into the formula Calculate and get the processability index U jg , where η1, η2, η3 are preset weight coefficients, and R is a preset compensation factor; An intermittent feed hopper is provided between the conveyor belt and the crusher. The coal particles on the conveyor belt are recorded as coarse particles. The coarse particles first fall into the intermittent feed hopper, and then are released into the crusher by the intermittent feed hopper at regular intervals. The total mass of the coarse particles in the intermittent feed hopper is recorded before each release. The crushing monitoring module monitors the status of the crusher. By recording and analyzing the materials produced by the crusher and combining the use time of the crusher, it calculates the roller wear value used to judge the durability of the crusher's roller skin; The roller skin wear value calculation process is as follows: The total mass of coarse particles in the intermittent feed hopper measured each time is recorded as the single mass. All single masses in a complete crushing process are recorded and a line graph of the change of each recorded single mass over time is drawn. The sum of all single masses in a complete crushing process is calculated and recorded as the total return weight G. all，1 The total amount of coal raw materials in a complete crushing process is recorded as the total crushing weight G all，2 , substitute into the formula The first evaluation index JP1 is obtained by calculation, where μ1 and μ2 are preset weight coefficients, T1 is the time for the coal mine to continue running after the raw material loading is completed, and the calculation formula is T1 = T all -T2, where T all is the total time of a complete crushing process, T2 is the total time required for uniform feeding of coal raw materials; Set a range analysis interval [(t-0.25T all ), (t+0.25T all )], where t is the midpoint of the time axis range in the time variation line graph, and the variance of all single masses within the calculation range analysis interval is recorded as G all，3 , and substitute it into the formula Calculate to obtain the second evaluation index JP2, substitute the first evaluation index JP1, the second evaluation index JP2 and the usage time T of the current roller skin of the crusher into the formula JP′=β1*JP1+β2*JP2+β3*T to calculate and obtain the roller skin wear value JP′, where β1, β2, and β3 are preset weight coefficients; The ball mill detection module analyzes and determines the wear state of the steel balls in the ball mill according to the processability index of the raw materials processed each time and the use record of the ball mill, and obtains the steel ball wear value used to judge the steel ball loss situation; The calculation process of the steel ball wear value is as follows: Get the used cycle interval of the steel balls in the ball mill, calculate the duration of the used cycle interval and record it as the steel ball use time DT, count the total number of complete crushing processes in the used cycle interval and record it as the steel ball use times NUM, each complete crushing process corresponds to a batch of coal raw materials, get the processability index of each batch of coal raw materials, substitute the processability index of each batch of coal raw materials in the used cycle interval into the formula Calculate the wear impact value U ms , where U j ' g For the preset wear setting value, the average value of all wear influence values ​​is calculated and recorded as the wear index Wear Index Substitute the steel ball usage time DT and the number of times the steel ball is used NUM into the formula Calculation is performed to obtain the steel ball wear value IR, where α1, α2, and α3 are preset weight coefficients; The general control analysis module has a preset quality threshold. When the quality index is lower than the quality threshold, an unqualified ore signal is generated. The steel ball wear threshold and roller skin wear threshold are preset. The steel ball wear value and roller skin wear value are compared with the corresponding steel ball wear threshold and roller skin wear threshold respectively. When any wear value is greater than or equal to the corresponding wear threshold, an abnormal wear signal is generated and the corresponding abnormal wear value is displayed.

2. The integrated control system for associated equipment for preparing coal water slurry according to claim 1, characterized in that: A sampling weight M is preset. A raw material sample with a weight of M is extracted from the coal mine raw material. The raw material sample is fully crushed to make a particle sample. The nine-point sampling method is used for sampling. The nine-point samples obtained are tested in batches. Batch testing means that the nine-point samples are evenly divided into multiple parts and then tested separately. Each test is only performed on a certain data, and the grindability index, purity value, density value, unit calorific value and sulfur content index of the nine-point samples are calculated respectively.

3. The integrated control system for associated equipment for preparing coal water slurry according to claim 2, characterized in that: Get the purity value P CD , density value ρ′, unit calorific value Q gr,ad And sulfur content index S DBST , for the purity value P CD , density value ρ′, sulfur content index S DBST After normalization, enter the formula The quality index ω3 is calculated, where λ1, λ2, and k are all preset weight coefficients, and ρ″, P C ' D , S′ DBST ω2′ are the preset density threshold, purity threshold, sulfur content threshold, and unit heating threshold, respectively. ω1 and ω2 are intermediate values. ad 、M ad They represent the hydrogen content and moisture content of the coal sample respectively.

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