Method and device for detecting density of coal dressing suspension
By installing pressure and flow rate sensors on the coal preparation suspension flow channel, combining the flow rate-pressure difference relationship model and the correspondence between the initial pressure difference and the density value, real-time, dynamic and accurate detection of the density of coal preparation suspension is achieved, and the current solution is solved There are problems in the art that the real-time and accuracy of density detection are insufficient.
Patent Information
- Application Number
- CN202411747117.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-02-14
AI Technical Summary
The existing coal preparation suspension density detection methods are difficult to achieve real-time, dynamic and accurate density detection in actual production environments, and cannot meet the demand for real-time density monitoring during production.
By installing pressure sensors and flow rate sensors on the coal preparation suspension flow channel, flow rate and pressure data are collected in real time, and combined with the pre-established flow rate-pressure difference relationship model and the first correspondence between the initial pressure difference and the density value, the suspension is quickly calculated. Density value of liquid.
Real-time, dynamic and accurate detection of the density of coal preparation suspension is achieved, timely reflects density changes, provides reliable data support for the optimization of coal preparation process, and improves the accuracy of density detection by dynamically correcting the resistance coefficient along the route.
Smart Images
Figure CN119437993A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of coal preparation suspension density detection, in particular to a coal preparation suspension density detection method and device. Background Art
[0002] In the process of coal washing and processing, the density control of coal suspension plays a vital role in ensuring the quality of clean coal and coal washing efficiency. Coal suspension is a mixture of water, weighting materials (such as magnetite powder, etc.) and other additives. Its density directly affects the separation effect of coal particles in the suspension.
[0003] Density detection of suspensions usually relies on traditional density measuring instruments, which show high accuracy under laboratory conditions. However, in the actual coal preparation production environment, the properties of the suspension will change due to many factors, such as temperature, pressure, concentration and particle size distribution of solid particles in the suspension. Existing density detection methods can provide high accuracy under laboratory conditions, but in the actual production process, due to the fluctuation of the properties of the suspension and the influence of environmental factors, the real-time and accuracy of the detection results often cannot meet the production needs. Summary of the invention
[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a method and device for detecting the density of a coal preparation suspension.
[0005] To achieve the above object, the present invention provides the following technical solution: a method for detecting the density of a coal preparation suspension, comprising the following steps: Step 1: Select two measuring points on the flow channel of the coal preparation suspension, install pressure sensors at the two measuring points respectively to measure the pressure values at the corresponding measuring points in real time, and install a flow velocity sensor in the flow channel; Step 2: When the coal preparation suspension is in a static state, the initial pressure difference between two measuring points is obtained by two pressure sensors, and the initial density value of the coal preparation suspension in the static state is measured to establish a first corresponding relationship between the initial pressure difference and the initial density value; Step 3: Use a flow rate sensor to measure the flow rate value of the coal preparation suspension to obtain real-time flow rate data of the suspension in a flowing state; Step 4: Establish a velocity-pressure difference relationship model. The velocity-pressure difference relationship model is used to calculate the pressure change caused by the velocity change during the flow of the coal preparation suspension. The expression formula is as follows:
[0006] in, is the theoretical pressure difference caused by the change in flow rate (unit: Pa), is the initial density of the coal preparation suspension at rest (unit: kg / m 3 ), which has been measured in step 1, and are the flow velocity values (in m / s) at two measuring points respectively, measured by the flow velocity sensor, is the gravitational acceleration, and the standard gravitational acceleration is 9.81m / s 2 , and are the heights of the two measuring points relative to the reference horizontal plane (unit: m), is the resistance coefficient along the way, is the distance between two measuring points (unit: m), is the equivalent diameter of the flow channel (unit: m), is the average flow velocity between two measuring points (unit: m / s); Step 5: Based on the velocity-pressure difference relationship model established in step 4 and the velocity value measured in step 3, calculate the actual additional pressure difference caused by the velocity change. ; Step 6: sum the initial pressure difference obtained in step 2 and the actual additional pressure difference caused by the flow rate change calculated in step 5 to obtain the actual total pressure difference; Step 7: Based on the first corresponding relationship established in step 2, the actual density value of the coal preparation suspension is calculated using the actual total pressure difference obtained in step 6, and the density value is output.
[0007] As a preferred solution of the present invention, the flow velocity sensor is an electromagnetic flow velocity sensor, and its measurement accuracy is within ±0.5%, and the measurement accuracy of the pressure sensor is within ±10Pa.
[0008] As a preferred solution of the present invention, in step one, the distance between the two measuring points ranges from 0.5m to 2m, and step one also includes an equipment pre-calibration step, in which the pressure sensor and flow rate sensor are calibrated using a standard pressure source and a stable fluid with a known flow rate.
[0009] As a preferred solution of the present invention, in step 4, the drag coefficient along the way is The determination method is: through experimental measurement of the pressure loss of coal preparation suspensions with different concentrations and viscosities flowing in a specific flow channel, combined with the flow rate data, the relationship expression between the suspension characteristics and the flow channel parameters is obtained by fitting using the least squares method, and the result is calculated based on the suspension concentration, viscosity and flow channel parameters during actual measurement.
[0010] As a preferred solution of the present invention, the viscosity of the coal preparation suspension is measured by a rotational viscometer. The viscosity value of the coal preparation suspension is measured before each density test, and the viscosity value is used for the drag coefficient along the way in step 4. Calculation.
[0011] As a preferred solution of the present invention, the average flow rate in step 4 is The calculation method is weighted average calculation, and the weight is determined according to the ratio of the flow channel cross-sectional area at the two measurement points. The expression is as follows:
[0012] in, and are the pipe cross-sectional areas at the two measuring points (unit: m²).
[0013] As a preferred solution of the present invention, the method for establishing the first corresponding relationship between the initial pressure difference and the initial density value in step 2 is: when the coal preparation suspension is in a static state, by changing the density of the suspension, measuring the initial pressure difference between two measuring points corresponding to multiple groups of different densities, and using a linear regression algorithm to establish a linear relationship between the pressure difference and the density value as the first corresponding relationship.
[0014] As a preferred solution of the present invention, the actual additional pressure difference caused by the flow rate change is calculated in step 5. When the resistance coefficient along the way The dynamic correction method is adopted, that is, the pre-established Database related to temperature and concentration The value is updated in real time and then substituted into the formula for calculation .
[0015] The present invention also provides a coal preparation suspension density detection device, comprising: A measuring module, the measuring module includes a pressure sensor and a flow rate sensor, and is used to obtain pressure data and flow rate data of the coal preparation suspension in the flow channel; A calibration module, used for pre-calibrating the pressure sensor and the flow rate sensor; A data processing module is used to calculate the average flow rate of the coal preparation suspension according to the flow rate data measured by the flow rate sensor, and to establish a flow rate-pressure difference relationship model according to the Bernoulli equation in fluid mechanics based on the initial pressure difference measured by the pressure sensor and the first corresponding relationship between the initial pressure difference and the initial density value established in advance; A density calculation module is used to sum the initial pressure difference and the actual additional pressure difference to obtain an actual total pressure difference, calculate an actual density value of the coal preparation suspension according to a first corresponding relationship between the actual total pressure difference and the initial pressure difference and the initial density value, and output the density value; The viscosity measurement module is used to measure the viscosity of the coal preparation suspension using a rotational viscometer before each density test, and use the viscosity value as the drag coefficient along the way. Calculation of The user interface module is used to display information such as detection results, sensor status, detection parameters, etc., and provide a user operation interface.
[0016] As a preferred solution of the present invention, it also includes a database module for storing data on the relationship between the along-the-way resistance coefficient and the suspension temperature and concentration. The data processing module is also used to dynamically correct the along-the-way resistance coefficient based on the real-time measured coal preparation suspension temperature and concentration. The database module provides parameter support required for dynamic correction.
[0017] Compared with the prior art, the method and device for detecting the density of coal preparation suspension have the following beneficial effects: 1. The present invention provides a method and device for detecting the density of a coal preparation suspension, the core of which is to realize real-time, dynamic and accurate detection of the density of the suspension. Traditional methods usually rely on laboratory measurements, and the detection results are delayed, which cannot meet the demand for real-time monitoring of density in the production process. The present invention installs a pressure sensor and a flow rate sensor on the flow channel of the coal preparation suspension to collect flow rate and pressure data in real time, and combines the pre-established flow rate-pressure difference relationship model and the first corresponding relationship between the initial pressure difference and the density value to quickly calculate the density value of the suspension and output it to the user. This method can timely reflect the changes in the density of the suspension and provide reliable data support for the optimization of the coal preparation process; in addition, the present invention also considers the influence of factors such as the temperature and concentration of the suspension on the density, and adopts a dynamic correction method to update the along-the-way resistance coefficient in real time. By establishing a relationship database between the temperature, concentration and the along-the-way resistance coefficient, and dynamically adjusting the model parameters according to the real-time measured temperature and concentration data, the accuracy of density detection is improved; this dynamic correction mechanism can effectively respond to changes in the properties of the suspension during the coal preparation production process and ensure the reliability of the detection results.
[0018] 2. The coal preparation suspension density detection device provided by the present invention integrates a measurement module, a calibration module, a data processing module, a density calculation module, a viscosity measurement module, a user interface module and a database module, etc., to realize the full process automation from data acquisition, processing to result output; the calibration module of the device can automatically calibrate the pressure sensor and the flow rate sensor to ensure the measurement accuracy; the database module stores a wealth of data on the relationship between the along-the-way resistance coefficient and the suspension temperature and concentration, providing reliable support for data processing and density calculation; the user interface module displays the test results in the form of intuitive numbers and charts, which is convenient for users to view and analyze; the viscosity measurement module can automatically measure the viscosity value of the suspension and use it for the calculation of the along-the-way resistance coefficient, further improving the automation level of density detection.
[0019] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the process steps of the method of the present invention; Figure 2 It is a logical schematic diagram of the device architecture of the present invention. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.
[0022] like Figure 1-Figure 2 As shown, the present invention provides a technical solution: a method for detecting the density of a coal preparation suspension, comprising the following steps: Step 101: Calibrate the pressure sensor and the flow rate sensor using a standard pressure source and a stable fluid with a known flow rate; In this application, a high-precision standard pressure source is used to apply a series of known pressure values to the pressure sensor, and the output value of the pressure sensor is recorded and compared with the standard pressure value. The internal parameters of the sensor are adjusted to make its measurement error within the allowable range. For the flow rate sensor, a stable fluid with a known flow rate (such as water) is used to allow the fluid to flow through the flow rate sensor under specific conditions (such as constant temperature, standard pipe diameter, etc.). The flow rate value measured by the sensor is compared with the actual flow rate value, and the calibration operation is also performed until the accuracy requirements are met.
[0023] Step 102: Select two measuring points on the flow channel of the coal preparation suspension, install pressure sensors at the two measuring points respectively to measure the pressure values at the corresponding measuring points in real time, and install a flow velocity sensor in the flow channel; By carefully selecting two measuring points on the flow channel of the coal preparation suspension, the distance between the two measuring points is set between 0.5m and 2m, for example, two positions with a distance of 1m are selected, and a pressure sensor is firmly installed at the selected measuring points. The measurement accuracy of the pressure sensor is controlled within ±10Pa to accurately obtain the pressure value at the measuring point; at the same time, the flow rate sensor is correctly installed in the flow channel. In this application, an electromagnetic flow rate sensor is used, and its measurement accuracy can reach within ±0.5%, thereby ensuring the accuracy of the flow rate measurement.
[0024] Step 201: when the coal preparation suspension is in a static state, the initial pressure difference between two measuring points is obtained by two pressure sensors, and the initial density value of the coal preparation suspension in the static state is measured to establish a first corresponding relationship between the initial pressure difference and the initial density value; In this application, the coal preparation suspension is stopped between two measuring points to stop the flow. After it is completely in a static state, the judgment of this state can be determined by the flow rate sensor measuring a value close to zero and being stable for a period of time; the initial pressure difference between the two measuring points is obtained by two pressure sensors, and the initial density value of the coal preparation suspension in this static state is accurately measured. The specific operation is as follows: Prepare several coal preparation suspension samples of different densities, and change the density by accurately adding different proportions of weighting materials (such as magnetite powder, pyrite powder, etc.) to the basic suspension.
[0025] In this application, suspension samples with densities of 1200kg / m³, 1300kg / m³, 1400kg / m³, 1500kg / m³ and 1600kg / m³ are configured.
[0026] For each density sample, inject it into the flow channel and let it stand still, and record the measured values of the two pressure sensors to obtain the initial pressure difference. .
[0027] Linear regression algorithm is used to analyze multiple sets of data , , ..., Perform analysis to establish a linear relationship between pressure difference and density value , this linear relationship is the first corresponding relationship, which is used for the subsequent calculation of the actual density of the suspension.
[0028] Step 301: using a flow velocity sensor to measure the flow velocity value of the coal preparation suspension to obtain real-time flow velocity data of the suspension in a flowing state; By using the flow velocity sensor to measure the flow velocity value of the coal preparation suspension in real time, the flow velocity sensor continuously collects the flow velocity changes of the coal preparation suspension in the flow channel and transmits the flow velocity data to the data processing module. For example, in the actual production process of a coal preparation plant, the flow velocity sensor collects flow velocity data every 1 second to timely grasp the flow state of the suspension.
[0029] Step 401: Determine the drag coefficient along the way : The viscosity of the coal preparation suspension was measured using a rotational viscometer. The measurement was performed before each density test to ensure that the viscosity value obtained could accurately reflect the characteristics of the current suspension. In a specific flow channel (such as a circular flow channel with a diameter of 0.3 m and a length of 5 m), the coal preparation suspensions with different concentrations (such as 10%, 20%, 30%, etc.) and different viscosities (adjusted by adding different additives) were allowed to flow at different flow rates, and their pressure losses were measured. Combined with the flow rate data, the least squares method was used to fit the flow rate data. and suspension density , Viscosity , equivalent flow channel diameter , measurement point distance The relationship expression between: .
[0030] Step 402: Calculate average flow rate : Accurately measure the flow channel cross-sectional area at two measuring points and , calculated by weighted average Calculate the average flow velocity, where and The flow velocity values at the two measuring points are respectively the flow velocity values at the two measuring points.
[0031] The expression formula of the flow rate-pressure difference relationship model is:
[0032] in, is the theoretical pressure difference caused by the change in flow rate (unit: Pa), is the initial density of the coal preparation suspension at rest (unit: kg / m 3 ), which has been measured in step 1, and are the flow velocity values (in m / s) at two measuring points respectively, measured by the flow velocity sensor, is the gravitational acceleration, and the standard gravitational acceleration is 9.81m / s 2 , and are the heights of the two measuring points relative to the reference horizontal plane (unit: m), is the resistance coefficient along the way, is the distance between two measuring points (unit: m), is the equivalent diameter of the flow channel (unit: m), is the average flow velocity between two measuring points (unit: m / s).
[0033] Step 501: Dynamically correct the drag coefficient along the way : Real-time measurement of the temperature and concentration of the coal preparation suspension, using the pre-established database of temperature and concentration relationships to find the corresponding correction coefficient , will soon Updated to .
[0034] Step 502: Based on the velocity-pressure difference relationship model established in step 4 and the velocity value measured in step 3, the actual additional pressure difference caused by the velocity change is calculated. ;
[0035] Among them, each parameter represents a parameter of the expression formula of the same flow rate-pressure difference relationship model.
[0036] Step 601: The initial pressure difference obtained in step 201 The actual additional pressure difference caused by the flow rate change calculated in step 5 Sum and get the actual total pressure difference .
[0037] Step 701: Calculate and output the actual density value of the coal preparation suspension according to the first corresponding relationship established in step 201 , the actual total pressure difference obtained in step 601 Substituting this relationship, the actual density of the coal preparation suspension is calculated as follows:
[0038] The calculated density value is output and displayed.
[0039] Furthermore, as a specific implementation of the above-mentioned method for detecting the density of a coal preparation suspension, the present application also provides a device for detecting the density of a coal preparation suspension, such as Figure 2 As shown, the device comprises: Measuring module: The pressure sensor and flow rate sensor in the measuring module are installed at two measuring points of the coal preparation suspension flow channel. The pressure sensor converts the real-time measured pressure value into an electrical signal and transmits it to the data processing module through a shielded cable to ensure the stability and anti-interference of the signal transmission; the flow rate sensor also transmits the measured flow rate signal to the data processing module to provide basic data for subsequent calculations.
[0040] The calibration module starts the calibration procedure after the initial installation of the equipment, during regular maintenance or when abnormal measurement data is found, uses a standard pressure source to generate accurate pressure values, calibrates the pressure sensor, and adjusts the sensor's zero point, gain and other parameters to make its measurement error meet the requirements; for the flow rate sensor, a stable fluid with a known flow rate is allowed to flow through the sensor in the calibration device, and the calibration coefficient inside the sensor is adjusted according to the measurement error to ensure the accuracy of the flow rate measurement. The calibration data is recorded during the calibration process for subsequent analysis and traceability.
[0041] The data processing module receives the flow rate data from the flow rate sensor and calculates the average flow rate of the coal preparation suspension according to the ratio of the flow channel cross-sectional area at the two measuring points using the weighted average calculation method. , and is also used to receive the initial pressure difference measured by the pressure sensor , and read the first correspondence between the initial pressure difference and the initial density value pre-established from the database module In the process of data processing, a velocity-pressure difference relationship model is established. According to the real-time measured temperature and concentration of the coal preparation suspension, the correction data of the resistance coefficient along the way is obtained from the database module, and dynamic correction is performed to improve the accuracy of the model calculation.
[0042] The density calculation module converts the initial pressure difference from the data processing module into The actual additional pressure difference caused by the calculated flow rate change Sum to get the actual total pressure difference According to the first corresponding relationship in the data processing module, the actual total pressure difference Substitute the value into the calculation to obtain the actual density of the coal preparation suspension.
[0043] The viscosity measurement module starts the rotary viscometer before each density test, inserts the measuring probe of the rotary viscometer into the coal preparation suspension, and measures the viscosity value of the coal preparation suspension according to the predetermined measurement procedure. For example, before each test, the viscometer is rotated at a speed of 100 rpm to measure the resistance torque of the suspension to the probe, and the viscosity value is calculated according to the calibration curve of the viscometer. The measured viscosity value is transmitted to the data processing module for the drag coefficient along the way. Calculation.
[0044] The user interface module is used to display the test results, including important parameters such as the actual density value, flow rate value, pressure value of the coal preparation suspension, and present them to the operator in the form of intuitive numbers and charts.
[0045] Database module for storing resistance coefficients along the way Data related to the temperature and concentration of the suspension, which are obtained through a large number of experimental measurements and analyses. The data is stored in the form of a table or function expression, for example, storing values corresponding to different temperature ranges (such as 0-50°C, with each interval being 5°C) and different concentration ranges (such as 5%-35%, with each interval being 5%). When the data processing module calculates the velocity-pressure difference relationship model and dynamically corrects the resistance coefficient along the process, it searches and obtains relevant data from the database module based on the real-time measured temperature and concentration. The database module can be updated regularly. For example, when a new coal preparation process is adopted, a different weighting material is used, or the flow channel conditions change, the experimental measurement is repeated to obtain new data and update the database to ensure the accuracy and reliability of the test results.
[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for detecting the density of a coal preparation suspension, characterized in that: The steps include: Step 1: Select two measuring points on the flow channel of the coal preparation suspension, install pressure sensors at the two measuring points respectively to measure the pressure values at the corresponding measuring points in real time, and install a flow velocity sensor in the flow channel; Step 2: When the coal preparation suspension is in a static state, the initial pressure difference between two measuring points is obtained by two pressure sensors, and the initial density value of the coal preparation suspension in the static state is measured to establish a first corresponding relationship between the initial pressure difference and the initial density value; Step 3: Use a flow rate sensor to measure the flow rate value of the coal preparation suspension to obtain real-time flow rate data of the suspension in a flowing state; Step 4: Establish a velocity-pressure difference relationship model. The velocity-pressure difference relationship model is used to calculate the pressure change caused by the velocity change during the flow of the coal preparation suspension. The expression formula is as follows: in, is the theoretical pressure difference caused by the change in flow rate (unit: Pa), is the initial density of the coal preparation suspension at rest (unit: kg / m 3 ), which has been measured in step 1, and are the flow velocity values (in m / s) at two measuring points respectively, measured by the flow velocity sensor, is the gravitational acceleration, and the standard gravitational acceleration is 9.81m / s 2 , and are the heights of the two measuring points relative to the reference horizontal plane (unit: m), is the resistance coefficient along the path, is the distance between two measuring points (unit: m), is the equivalent diameter of the flow channel (unit: m), is the average flow velocity between two measuring points (unit: m / s); Step 5: Based on the velocity-pressure difference relationship model established in step 4 and the velocity value measured in step 3, calculate the actual additional pressure difference caused by the velocity change. ; Step 6: sum the initial pressure difference obtained in step 2 and the actual additional pressure difference caused by the flow rate change calculated in step 5 to obtain the actual total pressure difference; Step 7: Based on the first corresponding relationship established in step 2, the actual density value of the coal preparation suspension is calculated using the actual total pressure difference obtained in step 6, and the density value is output.
2. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: The flow velocity sensor is an electromagnetic flow velocity sensor, and its measurement accuracy is within ±0.5%, and the measurement accuracy of the pressure sensor is within ±10Pa.
3. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: In the step one, the distance between the two measuring points ranges from 0.5m to 2m. The step one also includes an equipment pre-calibration step, in which the pressure sensor and the flow rate sensor are calibrated using a standard pressure source and a stable fluid with a known flow rate.
4. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: In step 4, the resistance coefficient along the way The determination method is: through experimental measurement of the pressure loss of coal preparation suspensions with different concentrations and viscosities flowing in a specific flow channel, combined with the flow rate data, the relationship expression between the suspension characteristics and the flow channel parameters is obtained by fitting using the least squares method, and the result is calculated based on the suspension concentration, viscosity and flow channel parameters during actual measurement.
5. A method for detecting density of a coal preparation suspension according to claim 4, characterized in that: The viscosity of the coal preparation suspension is measured by a rotational viscometer. The viscosity value of the coal preparation suspension is measured before each density test, and the viscosity value is used for the drag coefficient along the way in step 4. Calculation.
6. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: The average flow rate in step 4 The calculation method is weighted average calculation, and the weight is determined according to the ratio of the flow channel cross-sectional area at the two measurement points. The expression is as follows: in, and are the pipe cross-sectional areas at the two measuring points (unit: m²).
7. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: The method for establishing the first corresponding relationship between the initial pressure difference and the initial density value in step 2 is: when the coal preparation suspension is in a static state, by changing the density of the suspension, measuring the initial pressure difference of two measuring points corresponding to multiple groups of different densities, and using a linear regression algorithm to establish a linear relationship between the pressure difference and the density value as the first corresponding relationship.
8. A method for detecting density of a coal preparation suspension according to claim 1, characterized in that: The actual additional pressure difference caused by the change in flow rate is calculated in step 5 When the resistance coefficient along the way The dynamic correction method is adopted, that is, the pre-established Database related to temperature and concentration The value is updated in real time and then substituted into the formula for calculation .
9. A detection device applicable to the method for detecting density of a coal preparation suspension according to any one of claims 1 to 8, characterized in that: include: A measuring module, the measuring module includes a pressure sensor and a flow rate sensor, and is used to obtain pressure data and flow rate data of the coal preparation suspension in the flow channel; A calibration module, used for pre-calibrating the pressure sensor and the flow rate sensor; A data processing module is used to calculate the average flow rate of the coal preparation suspension according to the flow rate data measured by the flow rate sensor, and to establish a flow rate-pressure difference relationship model according to the Bernoulli equation in fluid mechanics based on the initial pressure difference measured by the pressure sensor and the first corresponding relationship between the initial pressure difference and the initial density value established in advance; A density calculation module is used to sum the initial pressure difference and the actual additional pressure difference to obtain an actual total pressure difference, calculate an actual density value of the coal preparation suspension according to a first corresponding relationship between the actual total pressure difference and the initial pressure difference and the initial density value, and output the density value; The viscosity measurement module is used to measure the viscosity of the coal preparation suspension using a rotational viscometer before each density test, and use the viscosity value as the drag coefficient along the way. Calculation of The user interface module is used to display information such as detection results, sensor status, detection parameters, etc., and provide a user operation interface.
10. A coal preparation suspension density detection device according to claim 9, characterized in that: It also includes a database module for storing data on the relationship between the along-the-way resistance coefficient and the suspension temperature and concentration. The data processing module is also used to dynamically correct the along-the-way resistance coefficient based on the real-time measured coal preparation suspension temperature and concentration. The database module provides parameter support required for dynamic correction.