CN112486228A - Control system and method for flotation machine - Google Patents
Control system and method for flotation machine Download PDFInfo
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- CN112486228A CN112486228A CN202011215479.2A CN202011215479A CN112486228A CN 112486228 A CN112486228 A CN 112486228A CN 202011215479 A CN202011215479 A CN 202011215479A CN 112486228 A CN112486228 A CN 112486228A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a control system for a flotation machine, wherein a signal input end of a detection system is connected with a signal output end of a machine to be floated, the detection system comprises a server terminal, a PC (personal computer) operation end, a control switch module, a detection component and a ray ash detector, the PC operation end and the control switch module are both connected to a network signal source, the signal output end of the control switch module is connected with the detection component, the PC operation end controls the opening and closing of the detection component through the control switch module, the PC operation end is connected with the server terminal through network communication, the other signal output end of the PC operation end is connected to the ray ash detector, and the detection component comprises different signal input ends connected with an ultrasonic liquid level meter and a flow detector; the scheme also discloses a signal detection method for the multi-channel flotation machine; by adopting the technical scheme, the control efficiency is improved, and the automatic regulating valve can roughly regulate the addition amount of the flotation reagent.
Description
Technical Field
The invention belongs to the field of flotation machines, and particularly relates to a control system and a control method for a flotation machine.
Background
At present, the floating fine ash detection in the production process of the current melt coal preparation plant mainly depends on manual sampling and assay, a group of data is obtained every hour, the production operation guidance is relatively lagged, and the stable control of product indexes and the yield potential are influenced; at the present stage, the addition of the sluice plate and the medicament of the tailing of the flotation machine is mainly controlled manually by experience, and uncertain factors are more. In order to improve the timeliness and the accuracy of the float detection, effectively guide the control of the production process, and realize the optimal product quality and the maximum yield.
Disclosure of Invention
The invention aims to provide an automatic control system and method for a multi-channel flotation machine.
In order to achieve the purpose, the invention adopts the technical scheme that:
a control system for a flotation machine is characterized in that a signal input end of a detection system is connected with a signal output end of a machine to be floated, the detection system comprises a server terminal and a PC operation end, control switch module, detect components and parts and ray ash detector, PC operation end and control switch module are all connected in the network signal source, the signal output part of control switch module links to each other with detection components and parts, the switching that PC operation end passes through control switch module control detection components and parts, link to each other through network communication between PC operation end and the server terminal, another signal output part of PC operation end is connected in ray ash detector, it includes the different signal input part that links to each other with supersound level gauge and flow detector to detect components and parts, detect components and parts pass through supersound level gauge and flow detector respectively with the flotation machine links to each other, liquid level information and flow information in the flotation machine are received and are transmitted in the server terminal.
The control switch module integrates various testing interfaces of the flotation machine, and is connected to the detection component through the corresponding testing interface.
The invention discloses a control system for a flotation machine, wherein a control switch module comprises a main control chip, a signal switching chip set and a power supply conversion chip, each chip in the signal switching chip set is respectively provided with different corresponding detection components and is respectively triggered by different high and low levels of the signal switching chip set, and the main control chip is electrically connected with an external power supply through the power supply conversion chip.
The invention discloses a control system for a flotation machine, wherein a signal switching chip set comprises a first signal switching chip and a second signal switching chip, the first signal switching chip and the second signal switching chip are respectively provided with a connecting port corresponding to different detection components, so that the first signal switching chip and the second signal switching chip are correspondingly communicated and connected with the corresponding detection components by connecting the connecting ports of the first signal switching chip and the second signal switching chip, and different detection components are connected with a main control chip by the signal switching chip and transmit signals to a server terminal.
The invention discloses a control system for a flotation machine, wherein a first module port triggered and conducted by a high level and a second module port triggered and conducted by a low level are arranged in a first signal switching chip, so that the corresponding flotation machine is connected to a main control chip through the first signal switching chip and a bus signal is transmitted to a server terminal.
The invention discloses a control system for a flotation machine, wherein a first module port triggered and conducted by a high level and a second module port triggered and conducted by a low level are arranged in a second signal switching chip, so that a corresponding detection component is connected to a main control chip through the first signal switching chip and transmits a signal to a server terminal.
The invention discloses a control system for a flotation machine, wherein an Ethernet signal is adopted as a network signal.
The control switch module adopts a matrix switch, and a plurality of testing interfaces of the flotation machine are integrated in the matrix switch and are correspondingly connected with the detection component.
The invention discloses a signal detection method for a multi-channel flotation machine, which further comprises the following steps:
s1, detecting elements in the corresponding flotation machine are connected through the PC operation end, and the PC end controls the opening and closing of a signal circuit corresponding to the control switch module;
and S2, comparing the flotation machine signal received by the server terminal with a set value, and transmitting the obtained detection result to a PC operation terminal.
By adopting the technical scheme, the feed flow and the concentration of the flotation machine are controlled to be stabilized in a certain range in a closed-loop manner by using the variable-frequency feed pump; the opening of a flotation tailing flashboard is controlled in a closed loop mode through the detected liquid level of the cell body of the flotation machine, so that the stability of the liquid level and the moderate thickness of a foam layer are ensured; establishing a mathematical model of the correlation between the dosage of the flotation reagent and the coal slime amount by the detected float coal slime amount and by means of a step-by-step release experiment result, and roughly adjusting the dosage of the flotation reagent by an automatic adjusting valve; the flotation clean coal ash content measured by the ash content meter automatically finely adjusts a medicament system (dosage and oil ratio) by means of an intelligent control theory and a machine learning principle.
The concentration, the flow, the floating fine ash content and the dosage of the medicament of the feed can be quickly detected, and the influence of human factors is eliminated; and the labor intensity of worker operation is reduced by advanced detection and control means. Meanwhile, workers are prevented from directly contacting with the flotation reagent, and the post occupational health environment is improved; the concentration and the flow of the flotation feed can be automatically adjusted according to the treatment capacity and the change of the coal slime content of different raw coal; the stable clean coal ash content can be ensured by using an intelligent control means, and the clean coal yield is improved.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of a master control signal connection of a control switch module according to the present invention;
fig. 2 is a hardware connection diagram of the control system of the present invention.
Labeled as: 1. a first signal switching chip; 2. a second signal switching chip; 3. a main control chip; 4. a network signal source; 5. a control switch module; 6. detecting a component; 7. a server terminal; 8. a PC operation terminal; 9. ray ash detector.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.
Fig. 2 is a hardware connection diagram of the control system of the present invention, and as shown in fig. 2, the control system for a flotation machine includes a signal input end of a detection system connected to a signal output end of a machine to be floated, the detection system includes a server terminal 7, a PC operation end 8, a control switch module 5, a detection component 6 and a ray gray scale detector 9, the PC operation end and the control switch module are both connected to a network signal source, the signal output end of the control switch module is connected to the detection component, the PC operation end controls the detection component to be turned on and off through the control switch module, the PC operation end is connected to the server terminal through network communication, another signal output end of the PC operation end is connected to the ray gray scale detector, and the network signal may adopt ethernet signal, internet signal, etc.
The control switch module integrates various testing interfaces of the flotation machine, is an optimal method, is connected to the detection component through the corresponding testing interfaces, realizes various testing of different interfaces, can be completed only by one-time installation and connection, and is distributed to products according to the sequence of the interfaces to complete the testing of the products. The omnidirectional antenna replaces a probe mode, the distance and the angle between the antenna and a product are fixed, and deviation caused by human factors is avoided.
Fig. 1 is a schematic diagram of connection of a master control signal of a control switch module according to the present invention, where the control switch module shown in fig. 1 is another method, and the control switch module further includes a master control chip, a signal switching chipset, and a power conversion chip, where each chip in the signal switching chipset is respectively provided with different corresponding detection components, and is respectively triggered by different high and low levels of the signal switching chipset, and the master control chip is electrically connected to an external power supply through the power conversion chip.
The signal switching chip set comprises a first signal switching chip and a second signal switching chip, the first signal switching chip and the second signal switching chip are respectively provided with connecting ports corresponding to different detection components, so that the connecting ports are correspondingly communicated and connected with the corresponding detection components, and the different detection components are connected with the main control chip through the signal switching chip and transmit signals to the server terminal; the first signal switching chip is provided with a first module port which is triggered and conducted by a high level and a second module port which is triggered and conducted by a low level, so that the corresponding flotation machine is connected to the main control chip through the first signal switching chip and transmits a bus signal to the server terminal, the second signal switching chip is provided with a first module port which is triggered and conducted by a high level and a second module port which is triggered and conducted by a low level, and the corresponding detection component is connected to the main control chip through the first signal switching chip and transmits a signal to the server terminal.
The control switch module of this case can also adopt the matrix switch, has integrateed the multiple test interface of flotation device in the matrix switch and correspond connect in detect components and parts.
The detection component comprises an ultrasonic liquid level meter and a flow detection meter, and the ultrasonic liquid level meter and the flow detection meter are respectively connected with the flotation machine so as to receive liquid level information and flow information in the flotation machine and transmit the liquid level information and the flow information to the server terminal.
The scheme also discloses a corresponding signal detection method, which further comprises the following steps:
s1, detecting elements in the corresponding flotation machine are connected through the PC operation end, and the PC end controls the opening and closing of a signal circuit corresponding to the control switch module;
and S2, comparing the flotation machine signal received by the server terminal with a set value, and transmitting the obtained detection result to a PC operation terminal.
The server terminal is mainly used for compiling indexes and steps in a background mode, a plurality of sets of systems can be used at the same time, the test consistency is guaranteed by compiling the indexes in a unified mode, the command right control of software programs, all devices and instruments is achieved, the background server can give on-off commands or reading commands to all devices (instruments) in sequence through the networking of the switch, and whether the test values are qualified or not is judged. Meanwhile, the test result is collected, the test equipment is changed from a single machine mode to a networking mode, and the test equipment is changed from single manual operation to centralized program control.
Closed-loop control of flotation: the concentration and the flow of the feed material of the flotation machine are controlled to be stable, and the dosage of the medicament is controlled by adopting a feedforward and feedback control scheme. The feed-forward control mainly calculates the real-time dry coal slurry amount entering and exiting the flotation machine according to the concentration and the flow rate entering the flotation machine, and according to the coal chemical consumption of each ton of the coal under the flotation machine, the chemical addition amount is the dry coal slurry amount and each ton of the coal chemical consumption plus a correction value; the feedback control is to introduce the ash content of the flotation clean coal into the control to form closed-loop control of the quality of the flotation clean coal, study the relation between the deviation of the ash content of the flotation clean coal (the difference between the feedback ash content and the set ash content) and the medicament amount according to the step-by-step release test, construct the medicament dosage deviation under the ash content deviation, and adjust the current medicament flow according to the medicament dosage deviation.
The system has three control modes, and operators in the manual mode can directly set the flow values of the two current reagents, and the influence of dry coal slime quantity and clean coal ash content is ignored. The automatic mode is mainly realized by a feedforward control mode. The intelligent mode is a combination of a feedforward control mode and a feedback control mode.
A detection unit section:
1. respectively detecting the concentration and the flow rate of a flotation feed by using an E + H concentration meter and a flow meter;
the density meter adopts a differential pressure densimeter to calculate the density through conversion, because the height difference of two pressure detection elements is known and constant when the differential pressure densimeter is installed, the corresponding density can be converted by measuring the pressure difference according to a formula delta p & ltrho & gt, and the density is converted into the corresponding density through a density-density conversion relation. The flow of the coal slime water fed currently is detected in real time through a flow meter arranged on a pipeline, and the floating concentration and the flow are known currently, so that the floating dry coal slime amount of the current flotation machine can be calculated.
2. Measuring the ash content of the flotation clean coal by using an online gamma-ray ash meter;
and a gamma-ray ash detector is arranged on a belt conveyor at the downstream of the pressure filter to detect the ash content of the flotation clean coal which is fed currently in real time. The properties such as granularity, moisture, shape and the like of the flotation clean coal are stable, so that the influence on the measurement of a gamma-ray ash meter can be eliminated after the flotation clean coal is corrected; the thickness of the flotation clean coal on the belt conveyor has great influence on the measurement of the ash content of the clean coal, and in order to realize the uniformity of the flotation clean coal blanking, the blanking of the pressure filter is uniformly blanked by the disc feeder; meanwhile, the feeding of the dosing filter is discontinuous, in order to enable the gamma-ray ash detector to accurately detect the ash content of the flotation clean coal, the detection algorithm of the ash detector is upgraded, and the ash algorithm calculation is carried out through the feeding period of the pressure filter, so that the real-time accurate detection of the ash content of the flotation clean coal is ensured.
3. Detecting the liquid level of a cell body of the flotation machine by using an ultrasonic liquid level meter:
the liquid level of the flotation machine is monitored in real time through the ultrasonic liquid level meter, and the liquid level of the flotation machine is monitored in real time in order to enable the flotation machine to operate under the optimal working condition because the flotation working condition of the flotation machine including the thickness of a foam layer, underflow roughing, secondary enrichment and the like can be influenced by the liquid level.
4. Detecting the dosage of the flotation reagent by using an E + H mass flow meter:
the addition of the flotation reagent is controlled and detected through an electromagnetic valve and a mass flow meter, the reagent flow is controlled through the valve opening, and the reagent flow is monitored in real time through the mass flow meter, so that the current reagent flow is the required flow.
By adopting the technical scheme, the feed flow and the concentration of the flotation machine are controlled to be stabilized in a certain range in a closed-loop manner by using the variable-frequency feed pump; the opening of a flotation tailing flashboard is controlled in a closed loop mode through the detected liquid level of the cell body of the flotation machine, so that the stability of the liquid level and the moderate thickness of a foam layer are ensured; establishing a mathematical model of the correlation between the dosage of the flotation reagent and the coal slime amount by the detected float coal slime amount and by means of a step-by-step release experiment result, and roughly adjusting the dosage of the flotation reagent by an automatic adjusting valve; the flotation clean coal ash content measured by the ash content meter automatically finely adjusts a medicament system (dosage and oil ratio) by means of an intelligent control theory and a machine learning principle.
The concentration, the flow, the floating fine ash content and the dosage of the medicament of the feed can be quickly detected, and the influence of human factors is eliminated; and the labor intensity of worker operation is reduced by advanced detection and control means. Meanwhile, workers are prevented from directly contacting with the flotation reagent, and the post occupational health environment is improved; the concentration and the flow of the flotation feed can be automatically adjusted according to the treatment capacity and the change of the coal slime content of different raw coal; the stable clean coal ash content can be ensured by using an intelligent control means, and the clean coal yield is improved.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (9)
1. A control system for a flotation machine, the signal input of the detection system being connected to the signal output of the flotation machine, characterized in that: including the server terminal among the detecting system, the PC operation end, the control switch module, detect components and parts and ray ash detector, PC operation end and control switch module all are connected in the network signal source, the signal output part of control switch module links to each other with detection components and parts, the PC operation end passes through the switching that control switch module control detected components and parts, link to each other through network communication between PC operation end and the server terminal, another signal output part of PC operation end connects in ray ash detector, it includes the different signal input part that links to each other with supersound level gauge and flow detection meter to detect components and parts, detect components and parts pass through supersound level gauge and flow detection meter respectively with the flotation machine links to each other to receive liquid level information and flow information in the flotation machine and transmit in the server terminal.
2. The control system of claim 1, wherein the control switch module integrates multiple test interfaces of the flotation machine, and the control switch module is connected to the detection component through the corresponding test interface.
3. The control system of claim 1, wherein: the control switch module comprises a main control chip, a signal switching chip set and a power supply conversion chip, wherein each chip in the signal switching chip set is provided with corresponding different detection components and parts respectively, the detection components and parts are triggered through different high and low levels of the signal switching chip set respectively, and the main control chip is electrically connected with an external power supply through the power supply conversion chip.
4. The control system according to claim 3, wherein the signal switching chip set comprises a first signal switching chip and a second signal switching chip, the first signal switching chip and the second signal switching chip are respectively provided with a connection port corresponding to different detection components, so as to be correspondingly connected to the corresponding detection components in a communication manner by turning on the connection ports, and the different detection components are connected with the main control chip through the signal switching chip and transmit signals to the server terminal.
5. The control system of claim 3, wherein a first module port which is triggered to be conducted by high level and a second module port which is triggered to be conducted by low level are arranged in the first signal switching chip, so that the corresponding flotation machine is connected to the main control chip through the first signal switching chip and a bus signal is transmitted to the server terminal.
6. The control system according to claim 3, wherein the second signal switching chip is provided with a first module port which is triggered to be conducted at a high level and a second module port which is triggered to be conducted at a low level, so that the corresponding detection component is connected to the main control chip through the first signal switching chip and transmits a signal to the server terminal.
7. The control system of claim 1, wherein the network signal is an ethernet network signal.
8. The control system of claim 1, wherein the control switch module is a matrix switch, and a plurality of testing interfaces of the flotation machine are integrated in the matrix switch and are correspondingly connected to the detection component.
9. A control method for a flotation machine comprising the control system of any one of claims 1 to 8, characterized by the further steps of:
s1, detecting elements in the corresponding flotation machine are connected through the PC operation end, and the PC end controls the opening and closing of a signal circuit corresponding to the control switch module;
and S2, comparing the flotation machine signal received by the server terminal with a set value, and transmitting the obtained detection result to a PC operation terminal.
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Application publication date: 20210312 |