CN114011567A - Suspension density control method, device, server and system - Google Patents

Suspension density control method, device, server and system Download PDF

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Publication number
CN114011567A
CN114011567A CN202210007726.2A CN202210007726A CN114011567A CN 114011567 A CN114011567 A CN 114011567A CN 202210007726 A CN202210007726 A CN 202210007726A CN 114011567 A CN114011567 A CN 114011567A
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liquid level
suspension
medium
density
barrel
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CN114011567B (en
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梁兴国
冯化一
楚遵勇
巩斌
张海运
张秀峰
韩兴伟
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Tianjin Meiteng Technology Co Ltd
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Tianjin Meiteng Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
    • B03B13/005—Methods or arrangements for controlling the physical properties of heavy media, e.g. density, concentration or viscosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions

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Abstract

The application provides a suspension density control method, a suspension density control device, a suspension density control server and a suspension density control system, and relates to the field of dense medium coal separation. The method comprises the following steps: reading the measured density of the suspension liquid measured by the densimeter, the liquid level of the medium-combining barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller; calculating the target opening degree of a water replenishing valve according to the measured density of the suspension; calculating the target opening degree of a flow divider according to the measured density of the suspension, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel; and controlling the opening of the water replenishing valve and the opening of the flow dividing valve to be adjusted by the programmable controller according to the target opening of the water replenishing valve and the target opening of the flow dividing valve. The suspension density control method can improve the accuracy and stability of suspension density control.

Description

Suspension density control method, device, server and system
Technical Field
The application relates to the field of dense medium coal separation, in particular to a suspension density control method, a suspension density control device, a suspension density control server and a suspension density control system.
Background
In the dense medium separation process of a coal preparation plant, raw coal is put into a suspension, coal with the density higher than that of the suspension sinks, coal with the density lower than that of the suspension floats, density separation is realized, and the stability of the density of the suspension must be ensured in order to obtain a good separation effect.
In the prior art, in order to realize stable control of the density of the suspension, the opening of a water replenishing valve is usually calculated and controlled by a programmable controller, a shunt loop is not provided or the opening of a shunt valve is fixed, the efficiency of internal operation of the programmable controller is low, meanwhile, the fluctuation and the nonuniformity exist in raw coal washed in a coal preparation plant, the accuracy and the stability of the density of the suspension are poor due to the fact that the shunt valve is not controlled or the raw coal is controlled singly, and the separation effect is reduced.
Disclosure of Invention
The invention aims to provide a suspension density control method, a suspension density control device, a suspension density control server and a suspension density control system, aiming at solving the problems of poor suspension density accuracy and stability and the like in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in a first aspect, an embodiment of the present application provides a suspension density control method, including:
reading the measured density of the suspension liquid measured by the densimeter, the liquid level of the medium-combining barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller;
calculating the target opening degree of a water replenishing valve according to the measured density of the suspension;
calculating the target opening degree of a flow divider according to the measured density of the suspension, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel;
and controlling the opening of the water replenishing valve and the opening of the flow dividing valve to be adjusted by the programmable controller according to the target opening of the water replenishing valve and the target opening of the flow dividing valve.
Optionally, the calculating a target opening degree of a water replenishing valve according to the measured density of the suspension includes:
calculating the target opening degree of the water replenishing valve according to the measured density of the suspension, the set density of the suspension and the density difference value of the previous adjustment;
optionally, obtaining, by the programmable controller, a magnetic content measured by a magnetic content meter;
calculating the content of the coal slime according to the content of the magnetic substances and the measured density of the suspension;
the calculating the target opening degree of the flow divider according to the suspension measured density, the combined medium barrel liquid level and the dilute medium barrel liquid level comprises the following steps:
and calculating the target opening degree of the diverter valve according to a preset calculation period according to the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content.
Optionally, calculating the target opening degree of the diverter valve according to the suspension measured density, the combined medium bucket liquid level, the dilute medium bucket liquid level and the coal slurry content according to a preset calculation cycle, including:
respectively determining a shunt opening corresponding to the suspension liquid measurement density, a shunt opening corresponding to the liquid level of the medium combining barrel, a shunt opening corresponding to the liquid level of the dilute medium barrel and a shunt opening corresponding to the coal slime content;
according to the preset calculation period, according to the respective corresponding weights, weighting and calculating the shunt opening corresponding to the suspension measured density, the shunt opening corresponding to the combined medium barrel liquid level, the shunt opening corresponding to the dilute medium barrel liquid level and the shunt opening corresponding to the coal slime content to obtain the target opening of the shunt valve.
Optionally, before obtaining the target opening degree of the diverter valve, the method further includes the steps of weighting and calculating a diversion opening degree corresponding to the measured density of the suspension, a diversion opening degree corresponding to the liquid level of the medium combining barrel, a diversion opening degree corresponding to the liquid level of the dilute medium barrel, and a diversion opening degree corresponding to the coal slime content according to respective corresponding weights:
and determining the weights corresponding to the suspension liquid measurement density, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the preset priority order of the coal slime content.
Optionally, the preset priority order is, from high to low: the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, the coal slime content and the measured density of the suspension liquid.
Optionally, calculating the dielectric loss condition in the suspension according to the content of the magnetic substance;
judging whether medium addition is needed or not according to the medium loss condition;
if the medium needs to be added, a reminding message is sent out to indicate the medium needs to be added and the number of the added media.
In a second aspect, an embodiment of the present application provides a suspension density control device, including:
the first acquisition module is used for reading the measured density of the suspension liquid measured by the density meter, the liquid level of the medium-containing barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller;
the second acquisition module is used for calculating the target opening of the water replenishing valve according to the measured density of the suspension;
the third acquisition module is used for calculating the target opening degree of the flow divider valve according to the measured density of the suspension, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel;
and the control module is used for controlling the water replenishing valve and the flow dividing valve to adjust the opening degree respectively through the programmable controller according to the target opening degree of the water replenishing valve and the target opening degree of the flow dividing valve.
In a third aspect, an embodiment of the present application provides a server, including: a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, when the server runs, the processor communicates with the storage medium through the bus, and the processor executes the machine-readable instructions to execute the suspension density control method of the first aspect.
In a fourth aspect, an embodiment of the present application provides a density control system, including: the device comprises a server, a programmable controller, a water replenishing valve, a flow dividing valve, a density meter, a first liquid level meter and a second liquid level meter; the water inlet of the medium combining barrel is communicated with the water supplementing valve, the water outlet of the medium combining barrel is communicated with a medium combining recovery pipe through sorting equipment, the flow dividing valve is positioned on the medium combining recovery pipe and is communicated with the feeding port of the dilute medium barrel through a medium combining flow dividing pipe, the density meter is arranged in a pipeline between the water supplementing valve and the sorting equipment, the first liquid level meter is arranged in the medium combining barrel, and the second liquid level meter is arranged in the dilute medium barrel;
the water replenishing valve, the flow divider valve, the density meter, the first liquid level meter and the second liquid level meter are all connected with the programmable controller, the programmable controller is connected with the server, and the server is used for executing the suspension density control method of the first aspect.
Optionally, the system further comprises a data display module, wherein the data display module is connected to the server and is used for displaying a variation curve of the measured density of the suspension, a variation curve of the opening degree of the water replenishing valve and a variation curve of the opening degree of the flow dividing valve.
Optionally, the system further includes a relational database and a non-relational database, both the relational database and the non-relational database are connected to the server, the relational database is used for storing preset key parameters required for executing the suspension density control method, and the non-relational database is used for storing measurement data and valve opening during executing the suspension density control method; wherein, the preset key parameters include: the method comprises the steps of collecting preset parameters required by the measurement data, calculating preset parameters required by the target opening degree of the water replenishing valve and calculating preset parameters required by the target opening degree of the flow dividing valve.
Compared with the prior art, the method has the following beneficial effects:
the embodiment of the application provides a suspension density control method, which comprises the steps of reading a suspension measured density measured by a density meter, a medium-combining barrel liquid level measured by a first liquid level meter and a dilute medium barrel liquid level measured by a second liquid level meter through a programmable controller; calculating the target opening degree of the water replenishing valve according to the measured density of the suspension; calculating the target opening degree of the flow divider according to the measured density of the suspension, the liquid level of the medium-combining barrel and the liquid level of the dilute medium barrel; and respectively controlling the water replenishing valve and the flow dividing valve to adjust the opening degree through the programmable controller according to the target opening degree of the water replenishing valve and the target opening degree of the flow dividing valve. This application is through controlling water supply valve and flow divider regulating aperture respectively, has realized water supply valve and flow divider's common control, secondly, at the in-process of calculating the target aperture of this flow divider, has considered multiple factor, like suspension measured density, close and have situated between bucket liquid level, rare and situated between bucket liquid level, compare in the flow divider uncontrollable or control singlely, control split flow that can be more sensitive improves the accuracy and the stability of suspension density, further promotes and selects separately the effect.
In addition, the regulation aperture of moisturizing valve in this application is server self based on the measured data who gathers, the target aperture of calculation, adopts server internal computation and obtains the target aperture of moisturizing valve, compares and uses the inside CPU of programmable controller, and calculation efficiency is higher, and the moisturizing is more nimble.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic hardware structure diagram of a suspension density control system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a software system for controlling the density of a suspension according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a suspension density control system according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of a suspension density control method according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart illustrating another process of calculating a target opening of a diverter valve in a suspension density control method according to an embodiment of the present application;
fig. 6 is a schematic flow chart illustrating another process of calculating a target opening of a diverter valve in a suspension density control method according to an embodiment of the present application;
fig. 7 is a schematic flow chart illustrating a medium management in a suspension density control method according to an embodiment of the present disclosure;
FIG. 8 is a schematic flow chart of another method for controlling the density of a suspension according to an embodiment of the present disclosure;
FIG. 9 is a schematic diagram of a suspension density control device according to an embodiment of the present disclosure;
fig. 10 is a schematic diagram of a server according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In order to realize the control of the density of the suspension, so that the density of the suspension is more stable and accurate, the invention provides a suspension density control system. A suspension density control system provided in the embodiments of the present application is explained below by way of specific examples. Fig. 1 is a schematic hardware configuration diagram of a suspension density control system according to an embodiment of the present disclosure, where the suspension density control system includes a server 10, a programmable controller 20, and a plurality of devices, where the plurality of devices includes a water replenishment valve 31, a flow dividing valve 32, a density meter 33, a first liquid level meter 34, and a second liquid level meter 35. The water inlet of the medium combining barrel is communicated with a water replenishing valve 31, and the density of the suspension can be regulated and controlled by regulating the water replenishing valve 31, if the water replenishing amount is regulated to be large, the density of the suspension is rapidly reduced; the water outlet of the medium combining barrel is connected with a separation device such as a heavy medium shallow groove or a heavy medium cyclone, the separation device is connected with a medium combining recovery pipe, the medium combining suspension returns to the medium combining barrel through the medium combining recovery pipe, the flow dividing valve is positioned on the medium combining recovery pipe and is connected with a thin medium barrel feeding port through the medium combining flow dividing pipe, a thin medium barrel discharging port is connected with a magnetic separator, and the magnetic separator recovers the medium and then sends the medium to the medium combining barrel so as to regulate and control the density of the suspension; the density meter 33 is arranged in a pipeline between the water replenishing valve 31 and the sorting equipment, the first liquid level meter 34 is arranged in the medium combining barrel, the density meter 33 is used for measuring the density of the suspension liquid, namely the density of the suspension liquid, and the first liquid level meter 34 is used for measuring the liquid level of the suspension liquid in the medium combining barrel, namely the liquid level of the medium combining barrel; a second level gauge 35 is arranged in the dilute tank for measuring the dilute tank level.
As shown in fig. 1, a plurality of devices are connected to a programmable controller 20, and the programmable controller 20 is also connected to a server 10. Alternatively, the server 10 and the programmable controller 20 are connected through a network using a high-speed network switch, and the programmable controller 20 is connected to a plurality of devices through signal lines. The server can be integrated with a density control program, namely a density control software system, and the software system can utilize virtualization technologies such as docker and docker-compound and autonomously developed system-level keep-alive services, so that the stable operation of the system can be ensured. A density control software system provided in the embodiments of the present application is explained below by way of specific examples. Fig. 2 is a software schematic diagram of a suspension density control software system according to an embodiment of the present disclosure, and as shown in fig. 2, the suspension density control software system includes an intelligent security service, a data acquisition service, and an intelligent display service, where the data acquisition service acquires measurement data in a plurality of devices through a programmable controller 20 and transmits the measurement data to the intelligent security service and the intelligent display service; the intelligent secret control service calculates target opening degrees of the water replenishing valve and the flow dividing valve according to the measured data, transmits target opening degree information to the intelligent display service, and simultaneously transmits the target opening degree information to the programmable controller 20 through the data acquisition service, and the programmable controller 20 adjusts the opening degrees of the water replenishing valve and the flow dividing valve according to the target opening degree information; the intelligent display service stores the data information transmitted by the intelligent secret control service and the data acquisition service and provides a display interface.
In specific implementation, the intelligent security control service in the server 10 issues a control instruction for reading data to the programmable controller 20 through the data acquisition service, the programmable controller 20 acquires and collects data measured by the density meters 33, the first liquid level meters 34 and the second liquid level meters 35 in the multiple devices by using a communication protocol, and the data acquisition service transmits the measured data to the intelligent security control service and the intelligent display service; the intelligent secret control service analyzes and calculates the measured data to obtain target opening degrees of the water replenishing valve 31 and the flow dividing valve 32, the target opening degree information is transmitted to the intelligent display service, meanwhile, a target opening degree control instruction is issued to the programmable controller 20 through the data acquisition service, the programmable controller 20 converts the control instruction into a numerical value to be written into each point in the programmable controller 20, the numerical value is finally converted into a corresponding control signal to enter the water replenishing valve 31 and the flow dividing valve 32 in a plurality of devices, and the water replenishing valve 31 and the flow dividing valve 32 execute opening degree adjusting operation corresponding to the control signal; the intelligent display service stores data information transmitted by the intelligent secret control service and the data acquisition service and provides a display interface, wherein the data information comprises but is not limited to measurement data and target opening.
Optionally, the programmable controller 20 may construct a communication protocol using Java language, and may construct data reading and writing channels of common protocols such as Step7, ethernet IP, and Modbus, so as to facilitate reading of real-time measurement data and writing of control instructions, where each type of communication protocol communicates with the programmable controller 20 through information such as protocol type and IP address, port number, rack number, and slot of the programmable controller 20, reads data according to a point address in the programmable controller 20, and reads or writes points according to different read/write types of each point inside the programmable controller 20.
Alternatively, the Programmable Controller 20 may be, for example, a Programmable Logic Controller (PLC).
On the basis of the hardware structure schematic diagram of a suspension density control system shown in fig. 1, the embodiment of the present application further provides an implementation example of the suspension density control system. Fig. 3 is a schematic view of a suspension density control system according to an embodiment of the present disclosure, and as shown in fig. 3, the suspension density control system further includes a data display module 40.
The server 10 is connected to the data display module 40, and the intelligent display service in the server 10 can control the data display module to provide a data display interface. The server 10 may control the data display module 40 to provide a data display interface through a restful interface and using front-end display technologies such as nodejs, and the data display interface may be displayed through an interactive (UI) picture and a preset display style. The data display module 40 can display a variation curve of the measured density of the suspension, a variation curve of the opening of the water replenishing valve and a variation curve of the opening of the flow divider valve in the suspension density control process through a data display interface. The data display interface can also provide a setting function of preset key parameters, and the preset key parameters comprise: the method comprises the steps of collecting preset parameters required by measurement data, calculating preset parameters required by the target opening degree of a water replenishing valve, and calculating preset parameters required by the target opening degree of a flow dividing valve, such as suspension set density and the like. The data display module 40 can also check information such as alarm records, operation records, system logs, system versions and the like through a data display interface, so that the man-machine interaction is more convenient.
The data display interface provided by the intelligent display service control data display module 40 can be displayed on an upper computer connected with the server, so that the user can operate and check related data conveniently. The upper computer and the server 10 are communicated through a network by using a high-speed network switch. In specific implementation, the data display interface displayed by the upper computer can provide three density control modes: the system comprises a collection mode, a manual mode and a full-automatic mode, and each density control mode can visually check data such as a density curve, a valve opening curve, a liquid level, magnetic substance content and the like. In the acquisition mode, the server only acquires data and does not control related components; in the manual mode, a simple and direct valve control interface is also provided on the interface, and the opening degrees of the water replenishing valve 31 and the flow dividing valve 32 can be manually adjusted; in the full-automatic mode, the interface provides a density setting function, after a user inputs the set density of the suspension, the density control system automatically operates, and the opening of the valve is automatically adjusted based on the operation result.
With continued reference to FIG. 3 above, the suspension density control system may further comprise: a relational database 50 and a non-relational database 60. A relational database 50 and a non-relational database 60, both connected to the server 10. The relational database 50 is used for storing preset key parameters required for executing the suspension density control method, such as suspension set density and the like, and the non-relational database 60 is used for storing measurement data and valve opening degrees in the process of executing the suspension density control method, such as suspension measured density, target opening degree of a shunt valve and target opening degree of a water replenishing valve.
The suspension density control method provided by the embodiment of the application can be executed by the server by running the integrated suspension density control program of the server. The suspension density control method provided by the embodiments of the present application is specifically illustrated below with reference to a plurality of examples.
Fig. 4 is a schematic flow chart of a suspension density control method according to this embodiment, which is applied to the density control system and can be executed by a server in the density control system. The specific steps and flow of a suspension density control method will be described in detail below with reference to fig. 4. As shown in fig. 4, the method includes:
s401, reading the measured density of the suspension liquid measured by the density meter, the liquid level of the medium-containing barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller.
The server 10 issues a control instruction for data reading to the programmable controller 20 according to the data acquisition frequency information, the programmable controller 20 obtains and collects data measured by the density meters 33, the first liquid level meters 34 and the second liquid level meters 35 in the multiple devices by using a communication protocol, transmits the measured data to the server 10, and the server 10 receives the measured data and stores the measured data in a first preset database such as a mongoDB database.
The data acquisition frequency information of the read data and the information such as the IP address, the port number, the rack number, the slot position, the point location address, etc. of the programmable controller 20 are stored in a second preset database such as a MySQL database, the server 10 reads the information from the second preset database, and then reads the measurement data such as the density measured by the density meter, the liquid level of the medium-containing bucket measured by the first liquid level meter, and the liquid level of the thin medium bucket measured by the second liquid level meter by the programmable controller 20 using the information read from the second preset database.
The second preset database is used as a relational database, the stored data is safe and accurate, and is suitable for storing key set parameters such as rules and configuration, so that the set parameters such as the data acquisition frequency information are stored in the second preset database, and meanwhile, the information of the programmable controller 20 required by the server 10 must be accurate and atomicity is guaranteed, so that the information such as an IP address, a port number, a frame number, a slot position and a point address of the programmable controller 20 is also stored in the second preset database.
According to the measurement data read by the data acquisition frequency information, the characteristics of large data volume and flexible structure exist, the second preset database is not suitable for storing or reading a large amount of data due to rollback, meanwhile, the first preset database is used as a non-relational database, although the consistency of the data cannot be guaranteed, the performance of the first preset database is approximately 10000 times higher than that of the second preset database in the aspect of storing or reading the large amount of data, and therefore the measurement data are stored in the first preset database.
Optionally, the first preset database further stores record information such as an alarm record and a system operation record, and the second preset database further stores key parameter information such as a system log and a system authority.
And S402, calculating the target opening of the water replenishing valve according to the measured density of the suspension.
The server 10 calculates and obtains the target opening degree of the water replenishing valve 31 by using the CPU inside the server 10 according to the measured density of the suspension, and performs caching by using the memory, so that the calculation efficiency is higher compared with the conventional programmable controller 20 in which the CPU is used for performing calculation.
And S403, calculating the target opening degree of the flow divider according to the measured density of the suspension, the liquid level of the medium-combining barrel and the liquid level of the dilute medium barrel.
The server 10 determines whether the liquid level of the medium-combining barrel is greater than or equal to a first preset alarm liquid level, whether the liquid level of the medium-combining barrel is less than a second preset alarm liquid level, whether the liquid level of the dilute medium barrel is greater than or equal to a third preset alarm liquid level, whether the liquid level of the dilute medium barrel is less than a fourth preset alarm liquid level, compares the suspension measured density with the suspension set density, and then obtains the target opening degree of the flow divider valve 32 according to the liquid level determination result of the liquid level of the medium-combining barrel, the liquid level determination result of the liquid level of the dilute medium barrel, and the density comparison result.
During specific implementation, if the liquid level of the medium mixing barrel is too high and is more than or equal to a first preset alarm liquid level, the opening degree of the flow dividing valve 32 is determined to be opened or increased, and if the liquid level of the medium mixing barrel is too low and is less than a second preset alarm liquid level, the opening degree of the flow dividing valve 32 is determined to be closed or decreased, wherein the first preset alarm liquid level is higher than the second preset alarm liquid level; if the liquid level of the dilute medium barrel is too high and is more than or equal to a third preset alarm liquid level, the opening degree of the flow dividing valve 32 is determined to be closed or reduced, and if the liquid level of the dilute medium barrel is too low and is less than a fourth preset alarm liquid level, the opening degree of the flow dividing valve 32 is determined to be opened or increased, wherein the third preset alarm liquid level is higher than the fourth preset alarm liquid level; the opening of the diverter valve 32 is opened or increased if the measured density of the suspension is lower than the set density of the suspension and the opening of the diverter valve 32 is closed or decreased if the measured density of the suspension is higher than the set density of the suspension. The adjusting direction of the opening degree is respectively determined according to the liquid level judging result of the combined medium barrel liquid level, the liquid level judging result of the dilute medium barrel liquid level and the density comparing result, and then the target opening degree is obtained based on the adjusting direction and the preset adjusting step length. And storing the suspension liquid with the set density into a second preset database.
Because it can not all be too high or cross lowly to close a bucket liquid level and a weak medium bucket liquid level in process of production, the liquid level appears overflowing the bucket phenomenon easily too high, and the liquid level crosses lowly and appears the bucket and is taken out the dry condition easily, at the in-process of calculating the target aperture, except that carry out the liquid level and judge in order to guarantee the safety in production state, still need carry out the density comparison, consequently, adjust the aperture of flow divider valve based on the target aperture, can effectively stabilize suspension density.
And S404, controlling the water replenishing valve and the flow dividing valve to adjust the opening degree respectively through the programmable controller according to the target opening degree of the water replenishing valve and the target opening degree of the flow dividing valve.
The server 10 issues the target opening control commands of the water replenishing valve 31 and the flow dividing valve 32 to the programmable controller 20, and the programmable controller 20 converts the target opening control commands into control signals, that is, electrical signals, which enter the water replenishing valve 31 and the flow dividing valve 32 to control the water replenishing valve 31 and the flow dividing valve 32 to execute corresponding opening operations.
In summary, according to the suspension density control method provided by the application, the target opening degree of the water replenishing valve can be calculated according to the suspension measured density, the target opening degree of the flow dividing valve 32 can be calculated according to the suspension measured density, the liquid level of the medium combining barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter, then the water replenishing valve and the flow dividing valve are respectively controlled to adjust the opening degrees according to the target opening degrees of the water replenishing valve and the flow dividing valve, so that the common control of the water replenishing valve and the flow dividing valve is realized, and secondly, in the process of calculating the target opening degree of the flow dividing valve, various factors such as the suspension measured density, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel are considered, compared with the case that the flow dividing valve is not controlled or is controlled singly, the flow dividing amount can be more sensitively controlled, the accuracy and the stability of the suspension density are improved, and the sorting effect is further improved.
In addition, in the method, the adjusting opening degree of the water replenishing valve is a target opening degree calculated by the server based on the acquired measurement data, and the target opening degree of the water replenishing valve is calculated and obtained by adopting the inside of the server.
On the basis of the suspension density control method shown in fig. 4, an embodiment of the present application further provides an implementation method for calculating a target opening of the water replenishing valve in the suspension density control method. Optionally, as shown in the method S402, calculating the target opening of the water replenishing valve according to the measured density of the suspension includes:
and calculating the target opening of the water replenishing valve according to the measured density of the suspension, the set density of the suspension and the density difference value adjusted in the previous time. And storing the set density of the suspension into a second preset database, wherein the difference value of the density adjusted at the previous time is the difference value between the measured density of the suspension measured at the previous time and the set density of the suspension.
That is, in the embodiment of the present application, the target opening degree of the water replenishment valve 31 may be calculated and obtained by the measured density of the suspension, the set density of the suspension, and the previously recorded density difference value ldiff. In the specific implementation, first, the difference diff between the suspension set density and the suspension measured density is calculated, and then the adjustment amplitude output of the water replenishing valve 31 is calculated and obtained according to the following formula (1).
output = Kp × diff + Ki × (diff + ldiff) + Kd × (diff-ldiff) + Km equation (1)
Where Kp denotes a proportional coefficient, Ki denotes an integral coefficient, Kd denotes a differential coefficient, and Km denotes an adjustment constant. The above-described method of calculating the target opening degree of the water replenishment valve 31 is also referred to as a PID algorithm.
If the measured density of the suspension is smaller than the set density of the suspension, the opening of the water replenishing valve 31 is reduced according to the adjustment amplitude output, and if the measured density of the suspension is larger than the set density of the suspension, the opening of the water replenishing valve 31 is increased according to the adjustment amplitude output, so that the water replenishing valve 31 reaches the target opening.
Through the suspension measured density, the suspension set density and the density difference ldiff recorded in the previous time, the target opening degree of the water replenishing valve 31 can be accurately calculated, the water replenishing amount of the water replenishing valve 31 is accurately adjusted, and the suspension density is quickly reduced by increasing the water replenishing amount.
Optionally, in a case where the adjusting force of the water replenishment valve 31 is insufficient, that is, if the density adjustment is performed for a preset time, the suspension density is not yet reached, at this time, the suspension density is adjusted by a second water replenishment valve having a larger pipe diameter than the water replenishment valve 31. The second water replenishing valve can be arranged at the upper end of the medium combining barrel, water is directly added into the medium combining barrel, and the second water replenishing valve is larger in pipe diameter, so that the water replenishing effect is more obvious. The water replenishing valve 31 and the second water replenishing valve replenish water at the same time, so that the adjusting speed of the density of the suspension can be accelerated.
On the basis of the suspension density control method shown in fig. 4, an embodiment of the present application further provides an implementation method for calculating a target opening of the splitter valve in the suspension density control method. In this embodiment, the target opening of the diverter valve may be calculated, for example, based on the measured suspension density, the merge drum liquid level, the lean drum liquid level, and the coal slurry content. This embodiment is explained in detail below with reference to the drawings. Fig. 5 is a schematic flow chart illustrating another process of calculating a target opening degree of the diverter valve in a suspension density control method according to this embodiment. As shown in fig. 5, in the method S403, calculating the target opening degree of the flow dividing valve according to the measured density of the suspension, the liquid level of the mixing tank, and the liquid level of the dilute tank may include:
and S501, acquiring the content of the magnetic substance measured by the magnetic substance content meter through a programmable controller.
The server 10 sends a control command of data reading to the programmable controller 20 according to the data acquisition frequency information, the programmable controller 20 acquires and collects data measured by the magnetic content meter by using a communication protocol, the measured data is transmitted to the server 10, and the server 10 receives the measured data and stores the measured data in the MongoDB database.
And S502, calculating the coal slime content according to the magnetic substance content and the measured density of the suspension.
In specific implementation, the coal slime content is obtained through calculation according to the magnetic substance content, and the coal slime content G is calculated and obtained according to the following formula (2).
G = A (rho-1000) -B F formula (2)
Wherein, A represents the coal slime correlation coefficient, rho represents the measured density of the suspension, B represents the correlation coefficient of the coal slime and the magnetic substances, and F represents the content of the magnetic substances.
If the coal slime content is too high, if the coal slime content is more than or equal to the preset coal slime content, the opening degree of the shunt valve 32 needs to be opened or increased, and if the coal slime content is too low, if the coal slime content is less than the preset coal slime content, the opening degree of the shunt valve 32 can be closed or decreased.
S503, calculating the target opening of the shunt valve according to the suspension measured density, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content and a preset calculation period.
And each calculation period obtains the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content, so as to determine the target opening of the diverter valve 32 and adjust the opening of the diverter valve 32 according to the adjustment step length. Alternatively, the adjustment step size is manually set, and may be a fixed parameter.
The method for calculating the target opening degree of the diverter valve 32 is also referred to as a time-series algorithm, and compared with the existing diverter valve 32 control method, the time-series algorithm takes fixed time as a calculation period, and takes more considered factors, so that the method is more comprehensive, and the density control is more accurate and stable.
On the basis of another method for calculating the target opening degree of the diverter valve in the suspension density control method shown in fig. 5, the embodiment of the present application further provides an implementation method for calculating the target opening degree of the diverter valve in the method. In this embodiment, for example, the target opening degree of the diverter valve may be obtained by performing a weighted sum operation on the diversion opening degrees of the suspension measured density, the combined medium bucket liquid level, the dilute medium bucket liquid level, and the coal slurry content according to weights respectively corresponding to the suspension measured density, the combined medium bucket liquid level, the dilute medium bucket liquid level, and the coal slurry content. This embodiment is explained in detail below with reference to the drawings. Fig. 6 is a schematic flow chart illustrating another process of calculating a target opening degree of the diverter valve in a suspension density control method according to this embodiment. As shown in fig. 6, in the method S503, calculating the target opening degree of the diverter valve according to a preset calculation cycle based on the measured density of the suspension, the liquid level of the mixing tank, the liquid level of the dilute medium tank, and the coal slurry content includes:
s601, respectively determining a shunt opening corresponding to the suspension liquid measurement density, a shunt opening corresponding to the liquid level of the medium combining barrel, a shunt opening corresponding to the liquid level of the dilute medium barrel and a shunt opening corresponding to the coal slime content.
Firstly, the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the corresponding shunt opening degree of the coal slime content are respectively determined, namely four same or different shunt opening degrees are obtained, and then the target opening degree of the shunt valve 32 is comprehensively judged through a plurality of shunt opening degrees.
And S602, according to a preset calculation period, according to respective corresponding weights, weighting and calculating a shunt opening corresponding to the suspension measured density, a shunt opening corresponding to the liquid level of the medium combining barrel, a shunt opening corresponding to the liquid level of the dilute medium barrel and a shunt opening corresponding to the coal slime content to obtain a target opening of the shunt valve.
In a specific implementation, optionally, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, the coal slime content and the measured density of the suspension may be calculated according to a weight of 4:3:2:1, and if the split openings corresponding to the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, the coal slime content and the measured density of the suspension are: when the adjustment is carried out, the opening degree corresponding to the liquid level of the medium mixing barrel, the coal slime content and the suspension measured density is increased, the weight for increasing the opening degree is 7 (4 +2+ 1), and the weight for decreasing the opening degree is 3 because the opening degree corresponding to the liquid level of the dilute medium barrel is decreased, so that the weight for increasing and decreasing the opening degree of the shunt valve 32 obtained according to the weighting and operation of the weight is 7:3, and finally, the condition that the opening degree of the shunt valve 32 is increased is judged, namely, the opening degree of the shunt valve 32 is increased according to the adjustment step length.
Optionally, weights corresponding to the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content are preset key parameters and are stored in a second preset database.
By setting the weight, various factors for controlling the suspension density can be treated differently, that is, the greater the weight, the higher the importance degree of the factor, and in the actual implementation process, the importance degree of each factor is generally different, so according to the actual production needs, the greater the importance degree of the factor is given, and the lower the importance degree of the factor is given, and further, the suspension density can be controlled more accurately in the actual production.
On the basis of another method for calculating the target opening degree of the diverter valve in the suspension density control method shown in fig. 6, the embodiment of the present application further provides an implementation method for determining weights respectively corresponding to the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, and the coal slurry content in the method. Optionally, in the method S602 as described above, before performing a weighted sum operation on the split opening corresponding to the measured density of the suspension, the split opening corresponding to the liquid level of the medium combining bucket, the split opening corresponding to the liquid level of the dilute medium bucket, and the split opening corresponding to the coal slurry content according to the respective weights, the method further includes:
and determining respective corresponding weights according to preset priority sequences of the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content. According to the preset priority order, the data with higher priority is given larger weight, and the data with lower priority is given smaller weight.
In this embodiment, the preset priority order is, from high to low, that: the liquid level of the medium mixing barrel, the liquid level of the dilute medium barrel, the coal slime content and the suspension liquid measurement density are set to be 4:3:2:1 respectively. It is understood that the priority order in this embodiment is only an example, and other priority orders may also be included, such as the preset priority order is, from high to low: the coal slurry content, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the suspension liquid measurement density are measured, meanwhile, the weight proportion is only set for showing, and other corresponding weights can be set, such as 5:4:2: 1.
The corresponding weights of the suspension density control method are determined according to the preset priority sequence, wherein the preset priority can be set with different priorities according to actual needs, the determined weights can be set according to the importance degree of each factor, the priorities and the weights can be set manually, different priorities and weights are set according to different actual conditions, actual production is more appropriate, and the universality of the suspension density control method is improved.
On the basis of another flow chart for calculating the target opening degree of the diverter valve in the suspension density control method shown in fig. 5 described above. Optionally, after the implementation method S501 of calculating the target opening degree of the shunt valve in a suspension density control method, that is, after the content of the magnetic substance measured by the magnetic substance content meter is obtained by the programmable controller, medium management may be further included according to the content of the magnetic substance, where the medium, that is, the content of the magnetic substance, in the suspension has a very large influence on the density of the suspension, so that the embodiment of the present application provides a medium management method to control the density of the suspension. This embodiment is explained in detail below with reference to the drawings. Fig. 7 is a schematic flow chart of a medium management in a suspension density control method according to an embodiment of the present application, and as shown in fig. 7, after the method S501, that is, after obtaining the content of the magnetic substance measured by the magnetic substance content meter through the programmable controller, the method further includes:
and S701, calculating the dielectric loss condition in the suspension according to the content of the magnetic substance.
Obtaining the content of the magnetic substance measured by the magnetic substance content meter through the programmable controller 20, obtaining a reading every hour, calculating the difference between the last reading and the current reading, and obtaining the dielectric loss condition, wherein the unit is as follows: ton/hour.
S702, judging whether to add medium according to the medium loss condition.
If the dielectric loss is larger, the dielectric needs to be increased.
And S703, if the medium needs to be added, sending out a reminding message to indicate the medium needs to be added and the medium adding quantity.
The influence of the magnetic substance content on the suspension density is very large, and if the consumption of the magnetic substance content is too large, there is not enough magnetic substance for sorting, so the magnetic substance should be appropriately increased to control the suspension density.
Alternatively, all calculations of the entire density control system should be of first importance for production safety, and in particular implementations, the medium management method has priority over the opening adjustment methods of the make-up valve 31 and the diverter valve 32.
On the basis of the suspension control methods provided in the above embodiments of the present application in fig. 4, 5, 6 and 7, the suspension density control method is specifically explained in a complete embodiment with reference to the following drawings. Fig. 8 is a schematic flow chart of another suspension density control method according to an embodiment of the present disclosure. As shown in fig. 8, the method includes:
s801, reading the measured density of the suspension liquid measured by the density meter, the liquid level of the medium-combining barrel measured by the first liquid level meter, the liquid level of the dilute medium barrel measured by the second liquid level meter and the content of the magnetic substance measured by the magnetic substance content meter through the programmable controller.
The specific implementation and effect description of S801 refer to S401 in fig. 4 and S501 in fig. 5, which are not described herein again.
S802, according to the content of the magnetic substance, medium management is carried out.
The specific implementation and effect description of S802 refer to S701 to S703 in fig. 7, which are not described herein again.
And S803, calculating the target opening of the water replenishing valve according to the measured density of the suspension.
The specific implementation and effect description of S803 are referred to as S402 in fig. 4, and are not described herein again.
S804, calculating the target opening degree of the shunt valve through weighting and operation according to the suspension measured density, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content and a preset calculation period.
The specific implementation and effect description of S804 refer to S602 in fig. 6, which is not described herein again.
And S805, controlling the opening of the water replenishing valve and the opening of the flow dividing valve respectively through the programmable controller according to the target opening of the water replenishing valve and the target opening of the flow dividing valve.
The specific implementation and effect description of S805 are described in reference to S404 in fig. 4, and are not described herein again.
Compared with the existing density control method, the other suspension density control method provided by the embodiment of the application prioritizes the medium management and the opening degree adjustment of each valve (the water replenishing valve 31 and the flow dividing valve 32), and prioritizes the relative parameters in the flow dividing valve 32: the suspension liquid is used for measuring the density, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content, priority division is also carried out, and corresponding weights are added, so that the accuracy and the stability of the density control system are improved.
The following describes a suspension control apparatus and a server for implementing the suspension control apparatus provided in the present application, and specific implementation processes and technical effects thereof are referred to above, and will not be described again below.
Fig. 9 is a schematic view of a suspension density control device according to an embodiment of the present application, and as shown in fig. 9, the suspension density control device includes:
the first obtaining module 901 is configured to read, by a programmable controller, a measured density of the suspension measured by the density meter, a liquid level of the medium-containing tank measured by the first liquid level meter, and a liquid level of the dilute medium tank measured by the second liquid level meter.
And a second obtaining module 902, configured to calculate a target opening of the water replenishing valve according to the measured density of the suspension.
And a third obtaining module 903, configured to calculate a target opening degree of the shunt valve according to the suspension measured density, the liquid level of the medium-combining barrel, and the liquid level of the dilute medium barrel.
And the control module 904 is configured to control the opening adjustment of the water replenishing valve and the flow dividing valve through the programmable controller according to the target opening of the water replenishing valve and the target opening of the flow dividing valve.
Optionally, the second obtaining module 902 is specifically configured to calculate the target opening of the water replenishing valve according to the measured density of the suspension, the set density of the suspension, and the difference between the densities adjusted in the previous time.
And a fourth obtaining module 905, configured to obtain, by using the programmable controller, the content of the magnetic substance measured by the magnetic substance content meter, and calculate the coal slurry content according to the content of the magnetic substance and the measured density of the suspension.
Optionally, the third obtaining module 903 is specifically configured to calculate the target opening degree of the diverter valve according to a preset calculation period according to the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, and the coal slurry content.
Optionally, the third obtaining module 903 is specifically configured to determine a splitting opening corresponding to the measured density of the suspension, a splitting opening corresponding to the liquid level of the close bucket, a splitting opening corresponding to the liquid level of the dilute bucket, and a splitting opening corresponding to the coal slurry content, and perform weighting and operation on the splitting opening corresponding to the measured density of the suspension, the splitting opening corresponding to the liquid level of the close bucket, the splitting opening corresponding to the liquid level of the dilute bucket, and the splitting opening corresponding to the coal slurry content according to respective corresponding weights according to a preset calculation period, so as to obtain a target opening of the diverter valve.
Optionally, the third obtaining module 903 is specifically configured to determine respective corresponding weights according to a preset priority order of the suspension measured density, the combined medium bucket liquid level, the dilute medium bucket liquid level, and the coal slurry content.
Optionally, the third obtaining module 903 is specifically configured to preset that the priority order sequentially from high to low is: and the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, the coal slime content and the suspension liquid measurement density.
Optionally, the fourth obtaining module 905 is further specifically configured to calculate a dielectric loss condition in the suspension according to the content of the magnetic substance, determine whether medium addition is needed according to the dielectric loss condition, and send a prompt message to indicate that medium addition is needed and the medium addition amount if medium addition is needed.
These above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Fig. 10 is a schematic diagram of a server according to an embodiment of the present application, where the server 10 may be integrated into a device or a chip of a device, and the device may be a computing device with a computing processing function.
The server 10 includes: a processor 11, a storage medium 12 and a bus 13, wherein the storage medium 12 stores machine-readable instructions executable by the processor 11, and when the server 10 runs, the processor 11 communicates with the storage medium 12 through the bus 13, and the processor 11 executes the machine-readable instructions to execute the above-mentioned method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Optionally, the invention also provides a program product, for example a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A method of controlling the density of a suspension, the method comprising:
reading the measured density of the suspension liquid measured by the densimeter, the liquid level of the medium-combining barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller;
calculating the target opening degree of a water replenishing valve according to the measured density of the suspension;
calculating the target opening degree of a flow divider according to the measured density of the suspension, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel;
and controlling the opening of the water replenishing valve and the opening of the flow dividing valve to be adjusted by the programmable controller according to the target opening of the water replenishing valve and the target opening of the flow dividing valve.
2. The method of claim 1, wherein calculating a target opening of a water replenishment valve based on the measured density of the suspension comprises:
and calculating the target opening of the water replenishing valve according to the measured density of the suspension, the set density of the suspension and the density difference value adjusted in the previous time.
3. The method of claim 1, further comprising:
acquiring the content of the magnetic substance measured by the magnetic substance content meter through the programmable controller;
calculating the content of the coal slime according to the content of the magnetic substances and the measured density of the suspension;
the calculating the target opening degree of the flow divider according to the suspension measured density, the combined medium barrel liquid level and the dilute medium barrel liquid level comprises:
and calculating the target opening degree of the diverter valve according to a preset calculation period according to the measured density of the suspension, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the coal slime content.
4. The method according to claim 3, wherein calculating the target opening degree of the flow dividing valve according to a preset calculation cycle according to the measured suspension density, the combined medium barrel liquid level, the dilute medium barrel liquid level and the coal slurry content comprises:
respectively determining a shunt opening corresponding to the suspension liquid measurement density, a shunt opening corresponding to the liquid level of the medium combining barrel, a shunt opening corresponding to the liquid level of the dilute medium barrel and a shunt opening corresponding to the coal slime content;
according to the preset calculation period, according to the respective corresponding weights, weighting and calculating the shunt opening corresponding to the suspension measured density, the shunt opening corresponding to the combined medium barrel liquid level, the shunt opening corresponding to the dilute medium barrel liquid level and the shunt opening corresponding to the coal slime content to obtain the target opening of the shunt valve.
5. The method according to claim 4, wherein before the weighting and calculating a splitting opening corresponding to the measured density of the suspension, a splitting opening corresponding to the liquid level of the medium combining barrel, a splitting opening corresponding to the liquid level of the dilute medium barrel, and a splitting opening corresponding to the coal slurry content according to the respective weights to obtain the target opening of the splitting valve, the method further comprises:
and determining the weights corresponding to the suspension liquid measurement density, the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel and the preset priority order of the coal slime content.
6. The method of claim 5, wherein the predetermined priority order is, in order from high to low: the liquid level of the medium combining barrel, the liquid level of the dilute medium barrel, the coal slime content and the measured density of the suspension liquid.
7. The method of claim 3, further comprising:
calculating the dielectric loss condition in the suspension according to the content of the magnetic substance;
judging whether medium addition is needed or not according to the medium loss condition;
if the medium needs to be added, a reminding message is sent out to indicate the medium needs to be added and the number of the added media.
8. A suspension density control device, comprising:
the first acquisition module is used for reading the measured density of the suspension liquid measured by the density meter, the liquid level of the medium-containing barrel measured by the first liquid level meter and the liquid level of the dilute medium barrel measured by the second liquid level meter through the programmable controller;
the second acquisition module is used for calculating the target opening of the water replenishing valve according to the measured density of the suspension;
the third acquisition module is used for calculating the target opening degree of the flow divider valve according to the measured density of the suspension, the liquid level of the medium combining barrel and the liquid level of the dilute medium barrel;
and the control module is used for controlling the water replenishing valve and the flow dividing valve to adjust the opening degree respectively through the programmable controller according to the target opening degree of the water replenishing valve and the target opening degree of the flow dividing valve.
9. A server, comprising a processor, a storage medium and a bus, wherein the storage medium stores machine-readable instructions executable by the processor, and when the server is running, the processor communicates with the storage medium via the bus, and the processor executes the machine-readable instructions to perform the suspension density control method according to any one of claims 1-7.
10. A suspension density control system, comprising: the device comprises a server, a programmable controller, a water replenishing valve, a flow dividing valve, a density meter, a first liquid level meter and a second liquid level meter; the water inlet of the medium combining barrel is communicated with the water supplementing valve, the water outlet of the medium combining barrel is communicated with a medium combining recovery pipe through sorting equipment, the flow dividing valve is positioned on the medium combining recovery pipe and is communicated with the feeding port of the dilute medium barrel through a medium combining flow dividing pipe, the density meter is arranged in a pipeline between the water supplementing valve and the sorting equipment, the first liquid level meter is arranged in the medium combining barrel, and the second liquid level meter is arranged in the dilute medium barrel;
the water replenishing valve, the flow divider valve, the density meter, the first liquid level meter and the second liquid level meter are all connected with the programmable controller, the programmable controller is connected with the server, and the server is used for executing the suspension density control method of any one of the claims 1 to 7.
11. The system of claim 10, further comprising a data display module, wherein the data display module is connected to the server and configured to display a variation curve of the measured density of the suspension, a variation curve of the opening of the water replenishing valve, and a variation curve of the opening of the flow dividing valve.
12. The system according to claim 10, further comprising a relational database and a non-relational database, wherein the relational database and the non-relational database are both connected to the server, the relational database is used for storing preset key parameters required for executing the suspension density control method, and the non-relational database is used for storing measurement data and valve opening during executing the suspension density control method; wherein, the preset key parameters include: the method comprises the steps of collecting preset parameters required by the measurement data, calculating preset parameters required by the target opening degree of the water replenishing valve and calculating preset parameters required by the target opening degree of the flow dividing valve.
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