Method, system and device for measuring concentration of coal slurry

Abstract

The invention discloses a coal slurry concentration measurement method, system and device, and relates to the field of industrial automation, and the method comprises the following steps: obtaining each historical reaction parameter and historical coal slurry concentration of coal slurry in a historical production process; performing data cleaning on each historical reaction parameter; a coal slurry concentration relation is constructed, independent variables in the coal slurry concentration relation are all reaction parameters, dependent variables are coal slurry concentrations, and coefficients of all the reaction parameters are obtained according to all historical reaction parameters and historical coal slurry concentrations after data cleaning; and obtaining the coal slurry concentration corresponding to the current reaction parameter according to the coal slurry concentration relationship and the current reaction parameter in the current production process. The coal slurry concentration at the current moment does not need to be sampled and analyzed in a laboratory, and calculation is more convenient and faster by using the coal slurry concentration relation. And the coal slurry concentration relationship is related to the historical coal slurry concentration by adopting the historical reaction parameters, so that the coal slurry concentration determined by using the coal slurry concentration relationship is more accurate, and the coal slurry production quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of industrial automation, and in particular to a method, system and device for measuring coal slurry concentration. Background Art

[0002] In the process of water-coal slurry gasification production, the concentration of water-coal slurry is a key indicator that affects the reaction of the water-coal slurry gasifier and needs to be strictly controlled. However, due to the low accuracy, high price, easy replacement and high maintenance cost of online analyzers on the market, online analyzers are generally not installed at the production site. Instead, laboratory offline analysis is used to sample and analyze at fixed time intervals. In actual production, the concentration of coal slurry has been fluctuating. The results obtained by the fixed-interval sampling and analysis have time lags, and there are errors in the laboratory analysis. Moreover, the results can only reflect the concentration of coal slurry at the sampling time, not the real-time value at each moment, so it affects the quality of coal slurry products. Summary of the invention

[0003] The purpose of the present invention is to provide a method, system and device for measuring coal slurry concentration, which does not require laboratory sampling and analysis of the current coal slurry concentration, and uses the coal slurry concentration relationship to calculate, which is more convenient and quick. In addition, the coal slurry concentration relationship uses historical reaction parameters and historical coal slurry concentrations, so the coal slurry concentration is determined more accurately using the coal slurry concentration relationship, which improves the quality of coal slurry products.

[0004] In order to solve the above technical problems, the present invention provides a method for measuring coal slurry concentration, comprising:

[0005] Obtaining various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry, wherein each of the historical reaction parameters will affect the historical coal slurry concentration;

[0006] Performing data cleaning on each of the historical reaction parameters;

[0007] Constructing a coal slurry concentration relationship, wherein the independent variables in the coal slurry concentration relationship are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning;

[0008] According to the coal slurry concentration relationship and the current reaction parameters in the current production process, the coal slurry concentration corresponding to the current reaction parameters is obtained.

[0009] On the other hand, various historical reaction parameters of the coal slurry in the historical production process and the historical coal slurry concentration corresponding to the combination of various historical reaction parameters are obtained, including:

[0010] Obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency;

[0011] Among them, the low-pressure coal slurry pump frequency and the secondary drum screen operating current are positively correlated with the coal slurry concentration, the coal weighing load is positively correlated with the low-pressure coal slurry pump frequency, the additive addition amount and the additive concentration are negatively correlated with the low-pressure coal slurry pump frequency, and the coal slurry discharge trough liquid level is positively correlated with the coal slurry concentration.

[0012] On the other hand, the coal slurry concentration relationship is constructed, including:

[0013] A coal slurry concentration relationship is constructed, and the expression of the coal slurry concentration relationship is:

[0014] Coal slurry concentration = A×X1+B×X2+C×X3+D×X4+E;

[0015] Among them, A, B, C, D and E are the coefficients of each independent variable, X1 is the frequency of the low-pressure coal slurry pump / coal weighing load, X2 is the amount of additive added × additive concentration × low-pressure coal slurry pump frequency conversion, X3 is the liquid level change rate of the coal slurry discharge trough, and X4 is the operating current of the coal slurry secondary drum screen.

[0016] On the other hand, at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry are obtained, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency includes:

[0017] Determining the time point of the coal slurry sampling;

[0018] Determining a preset time range including the time point;

[0019] Respectively obtain the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system within a preset time range in the historical production process of coal slurry;

[0020] Taking an average value of at least two of the coal weighing load, the amount of additive added, the concentration of additive, the frequency of the low-pressure coal slurry pump, the rate of change of the liquid level of the coal slurry discharge trough, and the operating current of the coal slurry secondary drum screen within a preset time range;

[0021] The respective average values ​​are taken as the historical reaction parameters.

[0022] On the other hand, data cleaning is performed on the historical reaction parameters, including:

[0023] Delete all historical reaction parameters at the time point where the historical reaction parameters are interrupted;

[0024] Deleting all historical reaction parameters of time points where the difference between the historical reaction parameters of adjacent time points is greater than a preset difference;

[0025] All historical reaction parameters at time points where the historical reaction parameters are higher than the corresponding preset parameter range are deleted, and each of the historical reaction parameters corresponds to a preset parameter range.

[0026] On the other hand, the coal slurry concentration relationship is constructed, including:

[0027] According to the coal raw material combinations consisting of the coal mine where the coal raw material is located, the coal type of the coal raw material and the production batches of the coal raw material, a coal slurry concentration relationship is constructed for each coal raw material combination;

[0028] determining each historical coal feedstock combination during the historical production process;

[0029] Performing data fitting on the coal slurry concentration relationship based on the historical reaction parameters and historical coal slurry concentrations after data cleaning for each historical coal raw material combination, and obtaining the coefficient of the independent variable in the coal slurry concentration relationship for each historical coal raw material combination;

[0030] According to the coal slurry concentration relationship and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained, including:

[0031] Determine the coal slurry concentration relationship corresponding to the current coal raw material combination in the current production process;

[0032] According to the relationship between the coal slurry concentrations corresponding to the current coal raw material combination and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained.

[0033] On the other hand, after data fitting of the coal slurry concentration relationship based on the historical reaction parameters and historical coal slurry concentrations after data cleaning for each historical coal raw material combination, it also includes:

[0034] Inputting the historical reaction parameters after data cleaning into the coal slurry concentration relationship to obtain the coal slurry concentration output by the coal slurry concentration relationship;

[0035] When the difference between the coal slurry concentration output by the coal slurry concentration relationship and the historical coal slurry concentration is less than a preset value, it is determined that the coal slurry concentration relationship is successfully constructed.

[0036] On the other hand, after obtaining the coal slurry concentration corresponding to the current reaction parameter according to the coal slurry concentration relationship and the current reaction parameter, the method further includes:

[0037] Based on the coal slurry concentration obtained by coal slurry sampling, the reaction parameters within the preset time range of the sampling time, the historical coal slurry concentration before the sampling time and the corresponding historical reaction parameters, the coal slurry concentration relationship is refitted to obtain updated coefficients of each of the reaction parameters to correct the coal slurry concentration relationship.

[0038] In order to solve the above technical problems, the present invention also provides a coal slurry concentration measurement system, comprising:

[0039] An acquisition unit, used to acquire various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry, wherein each of the historical reaction parameters will affect the historical coal slurry concentration;

[0040] A data cleaning unit, used for performing data cleaning on each of the historical reaction parameters;

[0041] A construction unit is used to construct a coal slurry concentration relationship, wherein the independent variables in the coal slurry concentration relationship are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning;

[0042] The measuring unit is used to obtain the coal slurry concentration corresponding to the current reaction parameters according to the relationship between the coal slurry concentration and the current reaction parameters in the current production process.

[0043] In order to solve the above technical problems, the present invention also provides a device for measuring coal slurry concentration, comprising:

[0044] Memory for storing computer programs;

[0045] A processor is used to implement the steps of the above-mentioned method for measuring coal slurry concentration when executing the computer program.

[0046] The present application provides a method, system and device for measuring coal slurry concentration, which relates to the field of industrial automation, including obtaining various historical reaction parameters and historical coal slurry concentrations of coal slurry in the historical production process; performing data cleaning on each historical reaction parameter; constructing a coal slurry concentration relationship, in which the independent variables in the coal slurry concentration relationship are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of each reaction parameter are obtained according to the various historical reaction parameters and historical coal slurry concentrations after data cleaning; according to the coal slurry concentration relationship and the current reaction parameters in the current production process, the coal slurry concentration corresponding to the current reaction parameter is obtained. There is no need for the laboratory to sample and analyze the coal slurry concentration at the current moment, and the coal slurry concentration relationship is used for calculation, which is more convenient and quick. Moreover, the coal slurry concentration relationship uses the historical reaction parameters and the historical coal slurry concentration to be related, so it is more accurate to use the coal slurry concentration relationship to determine the coal slurry concentration, which improves the quality of coal slurry products. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 A flow chart of a method for measuring coal slurry concentration provided by the present invention;

[0049] Figure 2 A structural schematic diagram of a coal slurry production process provided by the present invention;

[0050] Figure 3 A schematic diagram of the structure of a coal slurry concentration measurement system provided by the present invention;

[0051] Figure 4 A schematic structural diagram of a coal slurry concentration measuring device provided by the present invention. DETAILED DESCRIPTION

[0052] The core of the present invention is to provide a method, system and device for measuring coal slurry concentration, which does not require laboratory sampling and analysis of the current coal slurry concentration, and uses the coal slurry concentration relationship to calculate, which is more convenient and quick. The coal slurry concentration relationship uses historical reaction parameters and historical coal slurry concentrations, so the coal slurry concentration is determined more accurately using the coal slurry concentration relationship, which improves the quality of coal slurry products.

[0053] 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.

[0054] Figure 1 A flow chart of a method for measuring coal slurry concentration provided by the present invention, the method for measuring coal slurry concentration comprising:

[0055] S11: Obtain various historical reaction parameters and historical coal slurry concentrations in the historical production process of the coal slurry, and each historical reaction parameter will affect the historical coal slurry concentration;

[0056] Figure 2 The present invention provides a schematic diagram of the structure of a coal slurry production process, wherein the raw coal is fed into the coal mill through a coal weighing feeder, and the ground coal slurry enters the coal slurry discharge trough. The bottom of the coal slurry discharge trough is pumped into the coal slurry secondary drum screen through a low-pressure coal slurry pump and then enters the coal slurry large tank, thereby completing the coal slurry storage. The various historical reaction parameters in the production process are related to the operating frequency of the coal weighing feeder, the low-pressure coal slurry pump and the secondary drum screen. Coal slurry is generally composed of coal, water and additives. In the production process, the various historical reaction parameters directly affect the coal slurry concentration, that is, the coal content in the coal slurry.

[0057] S12: Data cleaning of each historical reaction parameter;

[0058] Since it is necessary to construct a coal slurry concentration relationship, in order to make the obtained relationship more accurate, it is necessary to pre-clean the data of the obtained reaction parameters. The historical reaction parameters after data cleaning can more accurately construct the coal slurry concentration relationship.

[0059] S13: constructing a coal slurry concentration relationship, in which the independent variables are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning;

[0060] The coal slurry concentration relationship includes dependent variables, independent variables and the coefficients of the independent variables. The independent variables are various historical parameters, and the dependent variable is the coal slurry concentration. In order to determine the relationship between the coal slurry concentration and the historical parameters, the historical reaction parameters and the historical coal slurry concentration are used to obtain the coefficients of the independent variables in the coal slurry concentration relationship. Then the coal slurry concentration relationship is obtained.

[0061] S14: According to the relationship between the coal slurry concentration and the current reaction parameters in the current production process, the coal slurry concentration corresponding to the current reaction parameters is obtained.

[0062] When the current coal slurry concentration is obtained using the established coal slurry concentration relationship, the current reaction parameter is input into the coal slurry concentration relationship to obtain the coal slurry concentration corresponding to the current reaction parameter. When determining the current coal slurry concentration, there is no need for laboratory analysis. It can be quickly obtained based on the coal slurry concentration relationship, thereby adjusting the coal slurry production process more timely and improving the quality of the coal slurry output.

[0063] The present application provides a method for measuring coal slurry concentration, which relates to the field of industrial automation, including obtaining each historical reaction parameter of coal slurry in the historical production process and the historical coal slurry concentration corresponding to the combination of each historical reaction parameter; performing data cleaning on the historical reaction parameters; constructing a coal slurry concentration relationship, in which the independent variables in the coal slurry concentration relationship are each reaction parameter, the dependent variable is the coal slurry concentration, and the coefficients of each reaction parameter are obtained according to the historical reaction parameters and the historical coal slurry concentration after data cleaning; according to the coal slurry concentration relationship and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameter is obtained. There is no need for the laboratory to sample and analyze the coal slurry concentration at the current moment, and the coal slurry concentration relationship is used for calculation, which is more convenient and quick. Moreover, the coal slurry concentration relationship uses the historical reaction parameters and the historical coal slurry concentration to be related, so it is more accurate to use the coal slurry concentration relationship to determine the coal slurry concentration, which improves the quality of coal slurry products.

[0064] Based on the above embodiments:

[0065] In some embodiments, obtaining various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry includes:

[0066] Obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency;

[0067] Among them, the frequency of the low-pressure coal slurry pump and the operating current of the secondary drum screen are positively correlated with the coal slurry concentration, the coal weighing load is positively correlated with the frequency of the low-pressure coal slurry pump, the amount of additives added and the concentration of additives are negatively correlated with the frequency of the low-pressure coal slurry pump, and the liquid level of the coal slurry discharge trough is positively correlated with the coal slurry concentration.

[0068] The biggest factors that can reflect the concentration of coal slurry are: low-pressure coal slurry pump frequency, secondary drum screen operating current. As the coal slurry concentration increases, the low-pressure coal slurry pump frequency increases, and the secondary drum screen operating current increases. This is because after the coal slurry concentration increases, the coal slurry is difficult to transport and pass through the secondary drum screen. When the coal weighing load increases, the frequency of the low-pressure coal slurry pump will also increase when the coal slurry concentration remains unchanged. The amount of additives added and the concentration of additives will affect the change in the viscosity of the entire coal slurry. After the total amount of additives increases, the viscosity of the coal slurry will decrease. Although the coal slurry concentration remains unchanged, it will cause the frequency conversion of the low-pressure coal slurry pump to decrease. If the liquid level of the coal slurry discharge trough increases, although the low-pressure coal slurry frequency conversion does not change much, it can also reflect the increase in the concentration of the coal slurry.

[0069] In some embodiments, constructing a coal slurry concentration relationship includes:

[0070] Construct the coal slurry concentration relationship, the expression of the coal slurry concentration relationship is:

[0071] Coal slurry concentration = A×X1+B×X2+C×X3+D×X4+E;

[0072] Among them, A, B, C, D and E are the coefficients of each independent variable, X1 is the frequency of the low-pressure coal slurry pump / coal weighing load, X2 is the amount of additive added × additive concentration × low-pressure coal slurry pump frequency conversion, X3 is the liquid level change rate of the coal slurry discharge trough, and X4 is the operating current of the coal slurry secondary drum screen.

[0073] Through the analysis of the coal slurry production process and coal slurry concentration mechanism, a large amount of experimental data is used to determine the relationship category between each parameter and coal slurry concentration, and a basic model is constructed based on the coal weighing load of the coal grinding system, the amount of additive added, the additive concentration, the frequency of the low-pressure coal slurry pump, the rate of change of the coal slurry discharge trough liquid level, the coal slurry discharge trough current, and the coal slurry secondary drum screen operating current. Finally, the basic model of coal slurry concentration is selected: coal slurry concentration = A×X1+B×X2+C×X3+D×X4+E, where A, B, C, D and E refer to constants. The basic model is assumed first and then fitted by the least squares method.

[0074] In some embodiments, obtaining at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in a control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency includes:

[0075] Determine the time point for coal slurry sampling;

[0076] Determine a preset time range that includes the time point;

[0077] Respectively obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system within a preset time range in the historical production process of the coal slurry;

[0078] Taking an average value of at least two of the coal weighing load, the amount of additive added, the concentration of additive, the frequency of the low-pressure coal slurry pump, the rate of change of the liquid level of the coal slurry discharge tank, and the operating current of the coal slurry secondary drum screen within a preset time range;

[0079] The respective average values ​​are taken as historical response parameters.

[0080] The production site of the coal slurry preparation unit is generally deployed with a DCS (Distributed Control System) for real-time production control and process historical data storage. According to the process analysis, firstly, the minute-level historical data of the process variables related to the coal grinding system and the coal slurry concentration are obtained from the DCS system, one piece of data per minute, and at least three months of historical data are used for modeling. Correspondingly, the laboratory analysis value of the water-coal slurry concentration in the same time interval is obtained, and the laboratory analysis is generally performed once every 4 hours. The data collected by the DCS system and the laboratory analysis data have different sampling frequencies. The DCS system is once every 1 minute, and the laboratory analysis data is once every 4 hours. Considering the difference between the sampling time and the recording time, the actual results of the laboratory analysis of the coal slurry concentration sampling, the grinding time of the raw coal in the drum screen and the residence time of the coal slurry discharge trough, the average value in the time period of 20 minutes before sampling and 10 minutes after sampling is used as the reference value.

[0081] In some embodiments, data cleaning of historical reaction parameters includes:

[0082] Delete all historical reaction parameters at the time point where the historical reaction parameters are interrupted;

[0083] Deleting all historical reaction parameters of time points where the difference between the historical reaction parameters of adjacent time points is greater than a preset difference;

[0084] All historical reaction parameters at time points where the historical reaction parameters are higher than the corresponding preset parameter range are deleted, and each historical reaction parameter corresponds to a preset parameter range.

[0085] Taking into account the impact of the start and stop, maintenance and coal quality changes of the coal mill during normal production, and comparing the analysis results, abnormal data needs to be eliminated. Specifically, abnormal values ​​such as data interruptions, large data changes, and exceeding indicators need to be eliminated in a timely manner.

[0086] In some embodiments, constructing a coal slurry concentration relationship includes:

[0087] According to the raw coal material combinations consisting of the coal mine where the coal raw material is located, the coal type of the coal raw material and the production batch of the coal raw material, a coal slurry concentration relationship is constructed for each coal raw material combination;

[0088] Determine each historical coal feedstock combination during historical production;

[0089] Based on the historical reaction parameters and historical coal slurry concentrations after data cleaning under each historical coal raw material combination, the data of the coal slurry concentration relationship is fitted to obtain the coefficients of the independent variables in the coal slurry concentration relationship of each historical coal raw material combination;

[0090] According to the relationship between coal slurry concentration and current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained, including:

[0091] Determine the coal slurry concentration relationship corresponding to the current coal raw material combination in the current production process;

[0092] According to the relationship between the coal slurry concentrations corresponding to the current coal raw material combination and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained.

[0093] Taking into account the impact of changes in coal quality on the system, different coal qualities are used to divide the system into groups. In actual production, coal chemical enterprises will purchase coal from different types of coal mines at the same time. There are certain differences between the types of coal from different coal mines. The coal from different coal mines or different batches are classified and counted, and the coal quality data of different groups are modeled separately.

[0094] That is, if any of the three properties of coal type, coal mine and batch is different, the coal quality will be different, so it is necessary to construct the coal slurry concentration relationship according to the combination of coal raw materials of coal mine, coal type and batch.

[0095] In some embodiments, after data fitting of the coal slurry concentration relationship based on the historical reaction parameters and historical coal slurry concentrations after data cleaning for each historical coal raw material combination, the method further includes:

[0096] Using the historical reaction parameters after data cleaning to input into the coal slurry concentration relationship, to obtain the coal slurry concentration output by the coal slurry concentration relationship;

[0097] When the difference between the coal slurry concentration obtained by the coal slurry concentration relationship and the historical coal slurry concentration is less than a preset value, it is determined that the coal slurry concentration relationship is successfully constructed.

[0098] By using the least squares method to fit the relationship between various variables and verifying it with laboratory data, the coal slurry concentration relationship is finally obtained.

[0099] For example, the present application provides a coal slurry concentration = 4.49 × (low-pressure coal slurry pump frequency / coal weighing load) + 0.0156 × additive addition amount × additive concentration × low-pressure coal slurry pump frequency conversion + 0.58 × coal slurry discharge trough liquid level change rate + 0.32 × coal slurry secondary drum screen operating current + 53.2305.

[0100] In some embodiments, after obtaining the coal slurry concentration corresponding to the current reaction parameter according to the relationship between the coal slurry concentration and the current reaction parameter, the method further includes:

[0101] Based on the coal slurry concentration obtained by coal slurry sampling, the reaction parameters within the preset time range of the sampling time, the historical coal slurry concentration before the sampling time and the corresponding historical reaction parameters, the coal slurry concentration relationship is refitted to obtain updated coefficients of each reaction parameter to correct the coal slurry concentration relationship.

[0102] During the use of the soft instrument, it is continuously calibrated with actual test data to improve the accuracy of the coal slurry concentration relationship.

[0103] Specifically, taking the sampling frequency of once every four hours as an example, after the coal slurry concentration relationship is corrected based on the results of this sampling, the corrected coal slurry concentration relationship is used for prediction within four hours from this sampling to the next sampling. After the next sampling, the next corrected coal slurry concentration is used to predict the coal slurry concentration for the next four hours.

[0104] Figure 3 A schematic diagram of the structure of a coal slurry concentration measurement system provided by the present invention, the coal slurry concentration measurement system comprising:

[0105] An acquisition unit 31 is used to acquire various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry. Each historical reaction parameter will affect the historical coal slurry concentration.

[0106] A data cleaning unit 32, used for performing data cleaning on each historical reaction parameter;

[0107] A construction unit 33 is used to construct a coal slurry concentration relationship, in which the independent variables are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning;

[0108] The measuring unit 34 is used to obtain the coal slurry concentration corresponding to the current reaction parameters according to the relationship between the coal slurry concentration and the current reaction parameters in the current production process.

[0109] Based on the above embodiments:

[0110] The acquisition unit 31 is specifically used to acquire at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank liquid level change rate and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by sampling the coal slurry at a preset frequency;

[0111] Among them, the frequency of the low-pressure coal slurry pump and the operating current of the secondary drum screen are positively correlated with the coal slurry concentration, the coal weighing load is positively correlated with the frequency of the low-pressure coal slurry pump, the amount of additives added and the concentration of additives are negatively correlated with the frequency of the low-pressure coal slurry pump, and the liquid level of the coal slurry discharge trough is positively correlated with the coal slurry concentration.

[0112] The construction unit 33 is specifically used to construct the coal slurry concentration relationship, and the expression of the coal slurry concentration relationship is:

[0113] Coal slurry concentration = A×X1+B×X2+C×X3+D×X4+E;

[0114] Among them, A, B, C, D and E are the coefficients of each independent variable, X1 is the frequency of the low-pressure coal slurry pump / coal weighing load, X2 is the amount of additive added × additive concentration × low-pressure coal slurry pump frequency conversion, X3 is the liquid level change rate of the coal slurry discharge trough, and X4 is the operating current of the coal slurry secondary drum screen.

[0115] The acquisition unit 31 is specifically used to acquire at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by sampling the coal slurry at a preset frequency and testing, including:

[0116] Determine the time point for coal slurry sampling;

[0117] Determine a preset time range that includes the time point;

[0118] Respectively obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system within a preset time range in the historical production process of the coal slurry;

[0119] Taking an average value of at least two of the coal weighing load, the amount of additive added, the concentration of additive, the frequency of the low-pressure coal slurry pump, the rate of change of the liquid level of the coal slurry discharge tank, and the operating current of the coal slurry secondary drum screen within a preset time range;

[0120] The respective average values ​​are taken as historical response parameters.

[0121] A data cleaning unit 32, specifically used to delete all historical reaction parameters at the time point where there is a historical reaction parameter interruption;

[0122] Deleting all historical reaction parameters of time points where the difference between the historical reaction parameters of adjacent time points is greater than a preset difference;

[0123] All historical reaction parameters at time points where the historical reaction parameters are higher than the corresponding preset parameter range are deleted, and each historical reaction parameter corresponds to a preset parameter range.

[0124] The construction unit 33 is specifically used to construct the coal slurry concentration relationship for each coal raw material combination according to the coal mine where the coal raw material is located, the coal type of the coal raw material and the coal raw material production batch;

[0125] Determine each historical coal feedstock combination during historical production;

[0126] Based on the historical reaction parameters and historical coal slurry concentrations after data cleaning under each historical coal raw material combination, the data of the coal slurry concentration relationship is fitted to obtain the coefficients of the independent variables in the coal slurry concentration relationship of each historical coal raw material combination;

[0127] The measuring unit 34 is specifically used to determine the coal slurry concentration relationship corresponding to the current coal raw material combination in the current production process;

[0128] According to the relationship between the coal slurry concentrations corresponding to the current coal raw material combination and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained.

[0129] Also includes:

[0130] A verification unit, used for inputting the historical reaction parameters after data cleaning into the coal slurry concentration relationship to obtain the coal slurry concentration output by the coal slurry concentration relationship;

[0131] When the difference between the coal slurry concentration output by the coal slurry concentration relationship and the historical coal slurry concentration is less than a preset value, it is determined that the coal slurry concentration relationship is successfully constructed.

[0132] The correction unit is used to refit the coal slurry concentration relationship based on the coal slurry concentration obtained by coal slurry sampling, the reaction parameters within a preset time range of the sampling time, the historical coal slurry concentration before the sampling time and the corresponding historical reaction parameters, so as to obtain updated coefficients of each reaction parameter and correct the coal slurry concentration relationship.

[0133] For an introduction to the coal slurry concentration measurement system provided in the present application, please refer to the above-mentioned embodiments, which will not be described in detail here.

[0134] Figure 4 A schematic diagram of the structure of a coal slurry concentration measuring device provided by the present invention, the coal slurry concentration measuring device comprising:

[0135] A memory 41, used for storing computer programs;

[0136] The processor 42 is used to implement the steps of the above-mentioned method for measuring the coal slurry concentration when executing the computer program.

[0137] For an introduction to the coal slurry concentration measuring device provided in the present application, please refer to the above-mentioned embodiments, which will not be described in detail here.

[0138] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0139] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0140] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for measuring coal slurry concentration, characterized in that: include: Obtaining various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry, wherein each of the historical reaction parameters will affect the historical coal slurry concentration; Performing data cleaning on each of the historical reaction parameters; Constructing a coal slurry concentration relationship, wherein the independent variables in the coal slurry concentration relationship are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning; According to the coal slurry concentration relationship and the current reaction parameters in the current production process, the coal slurry concentration corresponding to the current reaction parameters is obtained.

2. The method for measuring coal slurry concentration according to claim 1, characterized in that: Obtain various historical reaction parameters and historical coal slurry concentrations during the historical production process, including: Obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency; Among them, the low-pressure coal slurry pump frequency and the secondary drum screen operating current are positively correlated with the coal slurry concentration, the coal weighing load is positively correlated with the low-pressure coal slurry pump frequency, the additive addition amount and the additive concentration are negatively correlated with the low-pressure coal slurry pump frequency, and the coal slurry discharge trough liquid level is positively correlated with the coal slurry concentration.

3. The method for measuring coal slurry concentration according to claim 2, characterized in that: Construct coal slurry concentration relationships, including: A coal slurry concentration relationship is constructed, and the expression of the coal slurry concentration relationship is: Coal slurry concentration = A×X1+B×X2+C×X3+D×X4+E; Among them, A, B, C, D and E are the coefficients of each independent variable, X1 is the frequency of the low-pressure coal slurry pump / coal weighing load, X2 is the amount of additive added × additive concentration × low-pressure coal slurry pump frequency conversion, X3 is the liquid level change rate of the coal slurry discharge trough, and X4 is the operating current of the coal slurry secondary drum screen.

4. The method for measuring coal slurry concentration according to claim 2, characterized in that: Obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system during the historical production process of the coal slurry, and the historical coal slurry concentration obtained by testing after sampling the coal slurry at a preset frequency, including: Determining the time point of the coal slurry sampling; Determining a preset time range including the time point; Respectively obtain at least two of the coal weighing load, additive addition amount, additive concentration, low-pressure coal slurry pump frequency, coal slurry discharge tank level change rate, and coal slurry secondary drum screen operating current of each coal grinding system stored in the control system within a preset time range in the historical production process of the coal slurry; Taking an average value of at least two of the coal weighing load, the amount of additive added, the concentration of additive, the frequency of the low-pressure coal slurry pump, the rate of change of the liquid level of the coal slurry discharge trough, and the operating current of the coal slurry secondary drum screen within a preset time range; The respective average values ​​are taken as the historical reaction parameters.

5. The method for measuring coal slurry concentration according to claim 1, characterized in that: Performing data cleaning on the historical reaction parameters, including: Delete all historical reaction parameters at the time point where the historical reaction parameters are interrupted; Deleting all historical reaction parameters of time points where the difference between the historical reaction parameters of adjacent time points is greater than a preset difference; All historical reaction parameters at time points where the historical reaction parameters are higher than the corresponding preset parameter range are deleted, and each of the historical reaction parameters corresponds to a preset parameter range.

6. The method for measuring coal slurry concentration according to claim 1, characterized in that: Construct coal slurry concentration relationships, including: According to the coal raw material combinations consisting of the coal mine where the coal raw material is located, the coal type of the coal raw material and the production batches of the coal raw material, a coal slurry concentration relationship is constructed for each coal raw material combination; determining each historical coal feedstock combination during the historical production process; Performing data fitting on the coal slurry concentration relationship based on the historical reaction parameters and historical coal slurry concentrations after data cleaning for each historical coal raw material combination, and obtaining the coefficient of the independent variable in the coal slurry concentration relationship for each historical coal raw material combination; According to the coal slurry concentration relationship and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained, including: Determine the coal slurry concentration relationship corresponding to the current coal raw material combination in the current production process; According to the relationship between the coal slurry concentrations corresponding to the current coal raw material combination and the current reaction parameters, the coal slurry concentration corresponding to the current reaction parameters is obtained.

7. The method for measuring coal slurry concentration according to claim 6, characterized in that: After data fitting of the coal slurry concentration relationship based on the historical reaction parameters and historical coal slurry concentrations after data cleaning for each historical coal raw material combination, the method further includes: Inputting the historical reaction parameters after data cleaning into the coal slurry concentration relationship to obtain the coal slurry concentration output by the coal slurry concentration relationship; When the difference between the coal slurry concentration output by the coal slurry concentration relationship and the historical coal slurry concentration is less than a preset value, it is determined that the coal slurry concentration relationship is successfully constructed.

8. The method for measuring coal slurry concentration according to any one of claims 1 to 7, characterized in that: After obtaining the coal slurry concentration corresponding to the current reaction parameter according to the coal slurry concentration relationship and the current reaction parameter, the method further includes: Based on the coal slurry concentration obtained by coal slurry sampling, the reaction parameters within the preset time range of the sampling time, the historical coal slurry concentration before the sampling time and the corresponding historical reaction parameters, the coal slurry concentration relationship is refitted to obtain updated coefficients of each of the reaction parameters to correct the coal slurry concentration relationship.

9. A coal slurry concentration measurement system, characterized in that: include: An acquisition unit, used to acquire various historical reaction parameters and historical coal slurry concentrations during the historical production process of the coal slurry, wherein each of the historical reaction parameters will affect the historical coal slurry concentration; A data cleaning unit, used for performing data cleaning on each of the historical reaction parameters; A construction unit is used to construct a coal slurry concentration relationship, wherein the independent variables in the coal slurry concentration relationship are various reaction parameters, the dependent variable is the coal slurry concentration, and the coefficients of various reaction parameters are obtained according to various historical reaction parameters and historical coal slurry concentrations after data cleaning; The measuring unit is used to obtain the coal slurry concentration corresponding to the current reaction parameters according to the relationship between the coal slurry concentration and the current reaction parameters in the current production process.

10. A device for measuring coal slurry concentration, characterized in that: include: Memory for storing computer programs; A processor is used to implement the steps of the method for measuring coal slurry concentration as described in any one of claims 1 to 8 when executing the computer program.

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