Automatic online metering device for magnetite powder addition in coal preparation plant and medium consumption monitoring method
By detecting the real-time flow rate of the mixed liquid and the content of magnetite powder on the Internet, calculating the amount of magnetite powder added by computer programming and integral formulas, and combining the method of medium consumption calculation, the problems of lag, large error and high manual labor intensity in the measurement of magnetite powder addition and medium consumption monitoring in the coal preparation plant are solved, real-time and accurate magnetite powder addition measurement and accurate medium consumption calculation are achieved.
Patent Information
- Application Number
- CN202510320173.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-06-06
AI Technical Summary
The existing coal preparation plants have lag and errors in magnetite powder addition measurement and dielectric consumption monitoring methods, and the manual measurement method has a large labor intensity, and the dielectric consumption calculation does not take into account the impact of magnetite stock fluctuations, resulting in inaccurate calculation.
By detecting the real-time flow rate of the mixed liquid and the real-time content of magnetite powder on the online basis, the accumulated amount of magnetite powder addition is calculated through the integral formula, and combining the liquid volume and magnetic content in the qualified medium barrel required for the medium consumption, the consumption of magnetite powder ton is calculated to be calculated. The cumulative amount of magnetite powder ton is calculated through the weighted average method.
Real-time accuracy of magnetite powder addition measurement is achieved, measurement errors are reduced, labor intensity is reduced, and the accuracy and timeliness of on-site consumption management are improved by accurately calculating the consumption.
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Figure CN120101910A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of intelligent coal preparation plants, and in particular relates to an automatic online metering device for adding magnetite powder to coal preparation plants and a medium consumption monitoring method. Background Art
[0002] At present, the commonly used methods for measuring the addition of magnetite powder and monitoring medium consumption in coal preparation plants are: stage metering method (after the magnetite powder measured and put into storage is consumed, the amount of magnetite powder put into storage is used as the consumed magnetite powder), manual metering method (using manual weighing or metering containers to measure the consumed magnetite powder), mechanical automatic metering method (using electromagnetic suction cups with sensors and other mechanical means to measure the consumed magnetite powder), and then calculate the medium consumption during this period by the amount of raw coal washed and the magnetite powder consumption during this period; the above three methods all have the problems of delayed measurement results and large errors in magnetite powder addition, and the manual metering method also has the disadvantages of high labor intensity; in addition, the medium consumption calculation does not take into account the impact of the fluctuation of the magnetite inventory in the qualified medium barrel on the consumption of magnetite powder, which leads to inaccurate calculation of medium consumption indicators and failure to timely guide on-site medium consumption management. Summary of the invention
[0003] In view of the current status and problems of magnetite powder addition metering and medium consumption monitoring methods in coal preparation plants, the present invention is to detect the real-time flow rate of mixed liquor (mixture of magnetite powder and water) and the real-time content of magnetite in the mixed liquor and a medium adding cycle (the period from the start to the stop of the medium adding pump is considered as a medium adding cycle) online, and use computer programming to calculate the cumulative amount of magnetite powder added in one medium adding cycle through an integral formula (because the real-time flow rate of the mixed liquor and the real-time content of magnetite powder in the mixed liquor are fluctuating variables, so the amount of magnetite powder added should be calculated through an integral formula by computer programming); when calculating the medium consumption, according to a certain amount required for the medium consumption calculation, The volume of the suspension in the qualified medium barrel before and after the start and end of the period (which can be calculated by the historical data of the liquid level height in the qualified medium barrel detected online by the qualified medium barrel level meter) and the historical data of the magnetic content in the suspension detected online by the qualified suspension magnetic content meter, as well as the cumulative mass of all magnetite powder added in each medium adding cycle during a certain period corresponding to it, are used to determine the magnetite powder consumption during this period using a computer program, and combined with the raw coal washing volume during this period, the magnetite powder consumption per ton of raw coal (i.e., medium consumption) during this period is calculated; and then the weighted average cumulative algorithm is used to calculate the cumulative magnetite powder consumption per ton of raw coal for the whole day, month, or year. The specific calculation formula is as follows: Formula 1: In formula 1: M magnetite powder - the cumulative amount of magnetite powder added in one medium addition cycle (unit: kg); C Magnetism - Real-time content of magnetic material (i.e. magnetite powder) (unit: kg / L); Qmix - real-time flow rate of mixed liquid (unit: liter / second); T - the interpolation time of an interpolation cycle (unit: seconds).
[0004] Formula 2: In formula 2: W dielectric consumption - the consumption of magnetite powder per ton of raw coal in a certain period of time required for dielectric consumption calculation (unit: kg / ton); --The total mass of magnetite powder added in each adding cycle within a certain period of time required for medium consumption calculation (unit: kilogram); Q Raw coal - the amount of raw coal washed within a certain period required for medium consumption calculation (unit: tons); C1--The content of magnetic substances in the qualified suspension in the qualified medium barrel at the beginning of a certain period required for the calculation of medium consumption (unit: kg / L); V1--The volume of qualified suspension in the qualified medium barrel at the beginning of a certain period required for medium consumption calculation (unit: liter); C2--The content of magnetic substances in the qualified suspension in the qualified medium barrel at the end of a certain period required for the medium consumption calculation (unit: kg / L); V2--The volume of qualified suspension in the qualified medium barrel at the end of a certain period required for medium consumption calculation (unit: liter). BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Further features and advantages of the invention are apparent from the following description, which explains the invention in more detail based on exemplary embodiments in conjunction with the accompanying drawings.
[0006] Figure 1 It is a schematic diagram of an automatic online metering device for adding magnetite powder to a coal preparation plant according to the present invention; Figure 2 It is a schematic diagram of the raw coal belt metering device in the production system of a coal preparation plant.
[0007] Attached Figure 1 Marking description: 1--magnetic content measuring instrument, 2--electromagnetic flowmeter, 3--medium pump discharge pipeline riser, 4--medium pump, 5--aggregate tank, 6--mixture of magnetite powder and water, 7--medium magnetic separator, 8--magnetic separator tailings pipe, 9--magnetic separator concentrate pipe, 10--qualified medium barrel, 11--qualified suspension, 12--liquid level meter, 13--qualified medium pump, 14--magnetic content measuring instrument, 15--qualified medium pipe riser.
[0008] Attached Figure 2Marking description: 16--raw coal washing belt, 17--electronic belt scale. DETAILED DESCRIPTION
[0009] The following is the attached Figure 1 , Attachment Figure 2 The embodiment of the present invention is described. A magnetite powder collection pool 5 is arranged in a magnetite powder medium storehouse of a coal preparation plant. The magnetite powder pile is flushed with water by manual or automatic means. The magnetite powder is mixed with water and enters the collection pool 5. The mixed liquid 6 of the magnetite powder and water is pumped into the medium adding magnetic separator 7 through the medium adding pump 4. A magnetic content measuring instrument 1 and an electromagnetic flowmeter 2 are added to the position of the medium adding pump discharge pipeline riser 3. The discharge pipe of the medium adding pump 4 contains the mixed liquid 6 of the magnetite powder and water. The magnetic content measuring instrument 1 can measure the mixed liquid of the magnetite powder and water in the discharge pipe online. 6, the real-time magnetic substance (i.e., magnetite powder) content Cmagnetic (unit: kg / L), and the real-time flow rate Qmix (unit: L / s) of the mixed solution 6 of magnetite powder and water in the tube can be measured online by the electromagnetic flowmeter 2. In addition, the medium addition time T (unit: second) in a medium addition cycle can be calculated by starting and stopping the medium addition pump 4. The cumulative mass of magnetite powder added in a medium addition cycle is calculated by computer programming through the above real-time online data and the medium addition time T (see Formula 1 for details). After the mixed liquid 6 of magnetite powder and water is pumped into the medium adding magnetic separator 7 by the medium adding pump 4, the mixed liquid 6 of magnetite powder and water is magnetically separated by the medium adding magnetic separator 7, and the magnetite enters the qualified medium barrel 10 through the magnetic separator concentrate pipe 9, and the water and impurities are discharged through the magnetic separator tailing pipe 8; when calculating the medium consumption, the volume V1 and V2 of the qualified suspension 11 in the qualified medium barrel 10 before and after a certain period of time required for the medium consumption calculation (which can be calculated by the historical liquid level height data of the qualified suspension 11 detected online by the qualified medium barrel liquid level meter 12) and the historical magnetic content data C1 and C2 in the qualified suspension detected online by the magnetic content measuring instrument 14 installed on the qualified medium pipe riser 15, as well as the cumulative mass of all magnetite powder added in each medium adding cycle during this period Then, the computer program is used to determine the consumption of magnetite powder during this period, and combined with the raw coal washing volume Q raw coal during this period, the magnetite powder consumption per ton of raw coal during this period W medium consumption (i.e. medium consumption, see formula 2 for details) is calculated; then, the weighted average cumulative algorithm is used to calculate the cumulative magnetite powder consumption per ton of raw coal for the whole day, month or year.
Claims
1. A method for automatic online metering and medium consumption monitoring of magnetite powder addition in a coal preparation plant, characterized in that: include: S1. Obtain the real-time operation data of the coal preparation plant's medium addition system based on the automatic online metering device for adding magnetite powder; S2. Based on the qualified medium online detection device of the production system, the real-time operation data of the liquid level in the qualified medium barrel and the content of magnetic substances in the suspension are obtained; S3. Obtaining real-time measurement data of the amount of raw coal to be washed based on the raw coal metering device of the production system; S4. Using the real-time operating data of the coal preparation plant's medium addition system, the real-time data of the liquid level in the qualified medium barrel and the magnetic content in the suspension, and the real-time operating data of the washing volume, the medium consumption monitoring results of the coal preparation plant within a certain period are automatically calculated through a computer program.
2. The method for automatic online metering and medium consumption monitoring of magnetite powder addition in a coal preparation plant according to claim 1, characterized in that: The method of obtaining real-time operation data of the coal preparation plant adding medium system based on the automatic online metering device for adding magnetite powder includes: S1-1, obtaining the start time of the medium pump as the start collection time t1, and the stop time of the medium pump as the stop collection time t2; S1-2, using a flow meter and a magnetic content measuring instrument installed on the discharge riser of the medium pump to obtain the real-time flow rate of the mixed liquid of magnetite powder and water and the real-time content data of the magnetic matter in the mixed liquid during the operation of the medium pump; S1-3, using the real-time flow rate of the mixed solution, the real-time content data of magnetite in the mixed solution, and the running time of the medium adding pump, the mass M of magnetite powder added in one medium adding cycle from t1 to t2 is automatically calculated by a computer program 磁铁矿粉 .
3. The method for automatic online metering and medium consumption monitoring of magnetite powder addition in a coal preparation plant according to claim 1, characterized in that: The online detection device for qualified medium in the production system obtains the real-time operation data of the liquid level of the qualified medium barrel and the content of magnetic substances in the suspension; including: S2-1. Use the qualified medium barrel liquid level meter to obtain the real-time operating data of the liquid level in the qualified medium barrel; S2-2, using a magnetic content measuring instrument installed on a qualified medium pipeline to obtain real-time operating data on the magnetic content in the qualified suspension; S2-3. Calculate the change in mass of magnetite powder in the qualified suspension in the qualified medium barrel within a certain period of time by using the real-time operating data of the liquid level in the qualified medium barrel and the real-time operating data of the magnetic material content in the qualified suspension.
4. As claimed in claim 3, characterized in that Based on the qualified medium online detection device of the production system, the real-time operation data of the liquid level in the qualified medium barrel and the content of magnetic substances in the suspension are obtained, and the change in the mass of the magnetite powder in the qualified suspension in the qualified medium barrel within a certain period is calculated by using the real-time operation data of the liquid level in the qualified medium barrel and the real-time operation data of the content of magnetic substances in the qualified suspension; including: S2-3-1 Use the qualified medium barrel level gauge to obtain the real-time operating data of the liquid level in the qualified medium barrel, and calculate the qualified medium suspension volume V1 and V2 in the front and rear qualified medium barrels within a certain period; S2-3-2 Use the magnetic content measuring instrument installed on the qualified medium pipeline to obtain the real-time operation data of the magnetic content in the qualified suspension, and obtain the magnetic content C1 and C2 contained in the qualified medium suspension in the front and rear qualified medium barrels within a certain period; S2-3-3 According to the calculation formula: Δ=V1×C1-V1×C1, calculate the change Δ in the mass of magnetite powder contained in the qualified suspension in the qualified medium barrel within a certain period of time.
5. The method for automatic online metering and medium consumption monitoring of magnetite powder addition in a coal preparation plant according to claim 1, characterized in that: The method of obtaining real-time measurement data of the amount of raw coal washed based on the raw coal metering device of the production system includes: S3-1. Use the electronic belt scale metering device installed on the raw coal washing belt in the production system to obtain real-time measurement data on the amount of raw coal entering the washing belt.
6. The method for automatic online metering and medium consumption monitoring of magnetite powder addition in a coal preparation plant according to claim 1, characterized in that: The real-time operation data of the coal preparation plant's medium addition system, the real-time data of the liquid level in the qualified medium barrel and the magnetic content in the suspension, and the real-time operation data of the amount of raw coal entering the washing are automatically calculated by a computer program to obtain the coal preparation plant's medium consumption monitoring results within a certain period; including: S4-1. Use a computer program to automatically calculate the total mass of magnetite powder added in all the adding cycles within a certain period of time required for the medium consumption. Add the change in the mass of magnetite powder contained in the qualified suspension in the qualified medium barrel within a certain period of time Δ, and divide the sum by the corresponding amount of raw coal entering the washing process Q within a certain period of time. 原煤 , so according to the calculation formula: Thus, the consumption of magnetite powder (i.e. medium consumption) within a certain period can be obtained.