CN110961257A - Device and method for metering, adjusting and adding chemicals of coal flotation machine - Google Patents
Device and method for metering, adjusting and adding chemicals of coal flotation machine Download PDFInfo
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- CN110961257A CN110961257A CN201911177722.3A CN201911177722A CN110961257A CN 110961257 A CN110961257 A CN 110961257A CN 201911177722 A CN201911177722 A CN 201911177722A CN 110961257 A CN110961257 A CN 110961257A
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
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Abstract
A device and a method for metering, adjusting and adding a medicament of a coal flotation machine belong to the technical field of coal flotation machine equipment and methods, and are used for optimizing, adjusting and controlling the addition amount of the medicament of the coal flotation machine. The technical scheme is as follows: level sensor fixes the upper end at the medicament container, and there is the medicament pipeline in the bottom of medicament container to be connected with clear water pipeline, and clear water pipeline is connected with the emulsion pump through clear water pipeline pump, and the output of emulsion pump is connected with the emulsion medicament pipeline, and the emulsion medicament pipeline is connected with the dosing pipe, and the front end of dosing pipe is relative with the dosing point of flotation machine, installs the medicament governing valve in the medicament pipeline, installs the flowmeter in the dosing pipe and adds the medicine governing valve. The invention can accurately measure and adjust the total chemical adding amount of the flotation system and the chemical flow of each chemical adding point in real time, controls the chemical flow in a reasonable interval required by the flotation production process, ensures that clean coal can be efficiently and selectively floated and scraped, and improves the yield of concentrate and the product percent of pass.
Description
Technical Field
The invention relates to a device and a method for metering, adjusting and adding a medicament of a coal flotation machine, belonging to the technical field of coal flotation machine equipment and methods.
Background
Flotation is a method for separating useful minerals from useless minerals according to the difference of the surface properties of the minerals under the action of a medicament. Flotation concentrate is attached to a foam layer on the surface layer of ore pulp in a flotation machine, and the foam layer is separated from the ore pulp through overflow or a concentrate foam scraper, so that the accurate metering of flotation reagents and the control of the reagent quantity in a reasonable dosage range in the flotation production process are very critical.
The foaming agent in the flotation agent is a surface active substance, and is mainly used for reducing the interfacial tension on an air-water interface, promoting air to form small bubbles in coal slurry, expanding a separation interface, preventing the bubbles from merging, improving the stability of the bubbles in the mineralization and floating processes, and ensuring the bubbles to rise to form a foam layer. In the flotation process, an effective foam layer cannot be formed due to too low addition of a foaming agent, and concentrate in ore pulp cannot be fully floated; if the addition amount of the foaming agent in the flotation process is too high, the foam property in the flotation machine is subjected to virtual floating, the attachment capacity of the concentrate is reduced, and the foam subjected to virtual floating is extremely easy to break, so that the floated concentrate falls back into the ore pulp and cannot be scraped out by a concentrate scraper, and the concentrate loss is caused.
The collector in the flotation reagent changes the hydrophobicity of the surface of the mineral in the flotation process, so that the mineral to be floated is adhered to the surface of the air bubble and floats, and the purpose of mineral separation is achieved. In the flotation production process, the additive amount of the collecting agent is too low, so that the adhesion force of the coal slime concentrate on the foam surface is poor, and the coal slime concentrate falls back into the ore pulp in the upward floating process and cannot be fully floated; in the flotation production process, the ore substances in the ore pulp with too high addition of the collecting agent have too strong adhesive force in bubbles, and more impurities such as gangue are brought out from the ore concentrate product, so that the ash content of the ore concentrate product is too high, and the product quality requirement cannot be met.
Therefore, whether the flotation reagent can be accurately metered, regulated and added is a key factor influencing the yield and quality grade of the concentrate product.
The existing method for metering, adjusting and adding the chemicals in the mechanical stirring type flotation machine for coal mainly adopts two modes of metering and adjusting by matching a frequency converter with a metering pump and manually adjusting a manual valve of a chemical adding point, so that the chemicals are added to the flotation chemicals at the chemical adding point of the mechanical stirring type flotation machine. Because adjust measuring pump operating frequency and add dose not strict linear relation through the converter, thereby and make metering error very big because the locellus adds the dose less, and the measuring pump carries out the dose and adds and belongs to open loop control, do not carry out flotation reagent flow measurement before measuring pump export and dosing point again, measuring pump wearing and tearing or diaphragm measuring pump diaphragm damage can't carry out the medicament and add the time also can't carry out real-time supervision, only can realize the dose is inaccurate or the medicament can't add when the field worker discovers that the flotation effect is relatively poor, thereby seriously influence product yield and product quality. And when a needle valve is arranged at a dosing point for manual medicine dosage adjustment, no flow detection process is available, the manual medicine dosage adjustment can be only carried out according to the visual observation of an operator, and the flotation effect of the flotation machine is seriously influenced because the real-time adjustment is inconvenient to carry out when the flotation feeding is changed.
Because the existing method for metering, adjusting and adding the chemicals of the mechanical stirring type flotation machine for coal cannot meet the requirement of rapid development of production and influences the normal production, the device and the method for metering, adjusting and adding the chemicals of the flotation machine are necessarily improved to achieve the effects of rapidness and accuracy.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for metering, adjusting and adding a medicament of a coal flotation machine, wherein the device and the method can simply, quickly and accurately meter, adjust and add the medicament of the coal flotation machine, ensure that clean coal can be efficiently and selectively floated and scraped out, and improve the yield of concentrate and the qualified rate of products.
The technical scheme for solving the technical problems is as follows:
the utility model provides a coal is with flotation device medicament measurement, regulation, add device, it includes the medicament container, level sensor, the floater, the medicament pipeline, the clear water pipeline pump, the emulsification medicament pipeline, the dosing pipe, the medicament holds in the medicament container, level sensor fixes the upper end at the medicament container, the floater floats on the medicament liquid level, the floater is connected with level sensor, the bottom of medicament container has the medicament pipeline to be connected with the clear water pipeline, the clear water pipeline is connected with the emulsification pump through clear water pipeline pump, the output of emulsification pump is connected with the emulsification medicament pipeline, the emulsification medicament pipeline is connected with the dosing pipe, the front end of dosing pipe is relative with the dosing point of flotation device, install the medicament governing valve in the medicament pipeline, install flowmeter and dosing governing valve in the dosing pipe, level sensor, clear water pipeline pump, the emulsification pump, the medicament governing valve, The flowmeter and the medicine adding regulating valve are respectively connected with the control device through signal cables.
According to the device for metering, adjusting and adding the coal flotation machine medicament, the medicament container is a regular container with the same upper and lower sectional areas.
Above-mentioned device of flotation device for coal medicament measurement, regulation, interpolation, it is a plurality of to add the pencil, and a plurality of pencil is relative with a plurality of dosing points of flotation device respectively, installs the flowmeter respectively in every pencil and adds the medicine governing valve, and each flowmeter and add the medicine governing valve and all be connected through signal cable with controlling means.
A method for metering, regulating and adding a chemical agent of a coal flotation machine by using the device comprises the following steps:
a. defining a digital or analog flotation reagent liquid level height signal 1 detected by a liquid level sensor as H1Defining the outputted liquid level height signal 2 as H2The signal H is transmitted through a signal cable1、H2Respectively transmitting to a control device, collecting time difference delta t twice, and because the flotation liquid medicine is contained in a regular medicament container, the liquid level height change is delta H = H1- H2The total amount of the drug flux is measured as Ycv= Δ H × S/Δ t, S being the cross-sectional area of the regular medicament container;
b. according to the dry coal slime amount of the fed ore pulp, a reasonable numerical value Y is set for the total adding amount of the flotation reagentspThe set value is also input into the control device through a digital or analog signal;
c. calculating the total flow set value Y of the flotation reagentspWith the current measurement value Y of the total flow of the flotation agentcvWhen the difference value delta Y is greater than + X, the control device drives the medicament regulating valve to increase the opening degree so as to increase the medicament flow and enable the delta Y to fall back into the dead zone interval +/-X; when the delta Y is smaller than-X, the control device drives the medicament regulating valve to reduce the opening degree so as to reduce the medicament flow and enable the delta Y to fall back to the dead zone interval +/-X;
d. after the flotation reagent with accurately measured total amount passes through an emulsification system consisting of a clear water pipeline pump and an emulsification pump, the emulsification reagent is fully dispersed into clear water, and the fluid flow mixed with the emulsification reagent is multiple times of that of the emulsification reagent, so that convenience is brought to the emulsification systemThe total flow of the mixture of the clear water and the emulsifying agent is measured by a flowmeter, the flowmeters are respectively arranged at each chemical adding point for flotation to measure the flow of the mixed emulsifying agent at each chemical adding point to be Y1CV…YNCVAnd transmitting the data to the control device;
e. the chemical adding amount of each chemical adding point is set to be Y1 according to the requirement of the flotation production processSP…YNSPAnd c, the control device repeats the step c, drives the dosing adjusting valve to adjust the flow of the emulsified medicament at each dosing point, and enables the dosing flow to stably track the set value.
The invention has the beneficial effects that:
the coal flotation machine medicament metering, adjusting and adding device is characterized in that a medicament container is provided with a liquid level sensor, the medicament container is a container with a regular shape, and the medicament flow is measured through the liquid level sensor and the medicament container; a medicament regulating valve, a flowmeter and a dosing regulating valve are arranged on the medicament pipeline and the dosing pipe to control and regulate the flow of the medicament; the clear water pipeline pump and the emulsification pump are adopted to enlarge the adding flow of the medicament, so that the flow of the medicament can be more accurately detected in real time.
The invention is the initiative of metering, adjusting and adding the medicament of the coal flotation machine, can accurately meter and adjust the total medicament adding amount of a flotation system and the medicament flow of each medicament adding point in real time, controls the medicament flow within a reasonable interval required by a flotation production process, ensures that clean coal can be efficiently and selectively floated and scraped, and improves the yield of concentrate and the qualified rate of products.
Drawings
FIG. 1 is a schematic structural diagram of a device for metering, regulating and adding chemicals in a coal flotation machine.
The figures are labeled as follows: the device comprises a medicament container 1, a liquid level sensor 2, a floating ball 3, a medicament pipeline 4, a medicament regulating valve 5, a clean water pipeline 6, a clean water pipeline pump 7, an emulsification pump 8, an emulsification medicament pipeline 9, a medicament feeding pipe 10, a flowmeter 11, a medicament feeding regulating valve 12, a medicament feeding point 13, a flotation machine 14, a signal cable 15, a terminal wiring row or branch box 16 and a control device 17.
Detailed Description
The device for metering, adjusting and adding the coal flotation machine comprises a medicament container 1, a liquid level sensor 2, a floating ball 3, a medicament pipeline 4, a medicament adjusting valve 5, a clean water pipeline 6, a clean water pipeline pump 7, an emulsification pump 8, an emulsification medicament pipeline 9, a medicament adding pipe 10, a flowmeter 11 and a medicament adding adjusting valve 12.
The medicament container 1 is shown as a regular container having the same upper and lower sectional areas, and may be a cylindrical, oval or rectangular container having circular, oval or square cross sections for easy area and volume calculation.
The figure shows that the medicament is liquid, the medicament is contained in the medicament container 1, the liquid level sensor 2 is fixed at the upper end of the medicament container 1, the floating ball 3 floats on the liquid level of the medicament, the floating ball 3 is connected with the liquid level sensor 2, and the liquid level sensor 2 is connected with the control device 17 through a signal cable 15 through a terminal wiring row or a branch box 16.
The liquid level sensor can also adopt liquid level meters such as a pressure type liquid level meter, an electronic ruler liquid level meter, an ultrasonic liquid level meter, a laser ranging liquid level meter, a radar liquid level meter and a magnetostrictive liquid level meter, and can be selected according to actual conditions.
The bottom of the medicament container 1 is shown to be connected with a clean water pipeline 6 through a medicament pipeline 4, a medicament regulating valve 5 is installed in the medicament pipeline 4, the medicament regulating valve 5 is connected with a control device 17 through a signal cable 15 through a terminal connecting row or a branch box 16, and the control device 17 controls the opening degree of the medicament regulating valve 5, so that the medicament flow flowing out of the medicament pipeline 4 is regulated and controlled.
The figure shows that the total amount of the metered emulsion agents is uniformly dispersed into clear water through a high-shear emulsion pump 8, so that the flow of the measured fluid is doubled, the aim of facilitating measurement is fulfilled, and the addition amount of the flotation agents of each dosing point can be converted according to the measured amount of the emulsion agents as the average value of the agents is dispersed in the clear water. Clear water pipeline 6 is connected with emulsification pump 8 through clear water pipeline pump 7, and the clear water in medicament and the clear water pipeline is mixed the back and is emulsified by emulsification pump 8, has enlarged the flow of medicament after medicament and the clear water are mixed, can carry out real-time detection to the medicament flow more accurately.
The figure shows that an emulsion agent pipeline 9 is connected with a plurality of dosing pipes 10, the plurality of dosing pipes 10 are respectively opposite to a plurality of dosing points 13 of a flotation machine 14, and the dosing points 13 are respectively dosed. Each dosing pipe 10 is provided with a flow meter 11 and a dosing regulating valve 12, and each flow meter 11 and each dosing regulating valve 12 are connected with a control device 17 through a signal cable 15. The flow meter 11 records the flow of each dosing pipe 10, feeds information back to the control device 17, and the control device 17 then transmits a control signal to the dosing regulating valve 12 to regulate the opening of the dosing regulating valve 12, so that the purpose of controlling the dosing flow is achieved.
The flow meter can be selected according to requirements, and comprises a turbine flow meter, a vortex shedding flow meter, a pore plate flow meter, an electromagnetic flow meter and other various flow meters capable of detecting the liquid flow of the pipeline.
The invention relates to a method for metering, adjusting and adding a medicament of a coal flotation machine, which comprises the following steps of:
a. defining the digital or analog flotation agent liquid level height signal 1 detected by the liquid level sensor 2 as H1Defining the outputted liquid level height signal 2 as H2The signal H is transmitted via a signal cable 151、H2Respectively transmit to the control device 17, collect time difference Δ t twice, because the flotation liquid medicine holds in regular medicament container 1, the liquid level height change is Δ H = H1- H2The total amount of the drug flux is measured as Ycv= Δ H × S/Δ t, S is the cross-sectional area of the regular medicament container 1;
b. according to the dry coal slime amount of the fed ore pulp, a reasonable numerical value Y is set for the total adding amount of the flotation reagentspThe set value is also input to the control device 17 by a digital or analog signal;
c. calculating the total flow set value Y of the flotation reagentspWith the current measurement value Y of the total flow of the flotation agentcvThe dead zone section + -X of DeltaY is set, and when DeltaY is greater than + X, the control device 17 drives the chemical regulating valve 5 to increase the opening degree to increaseAdding the medicament flow to enable the delta Y to fall back to the range +/-X of the dead zone; when the delta Y is smaller than-X, the control device 17 drives the medicament regulating valve 5 to reduce the opening degree so as to reduce the medicament flow and enable the delta Y to fall back to the dead zone interval +/-X;
d. after the flotation reagent with accurately measured total amount passes through an emulsification system consisting of a clear water pipeline pump 7 and an emulsification pump 8, the emulsification reagent is fully dispersed into clear water, the flow rate of the fluid mixed with the emulsification reagent is multiple times of that of the emulsification reagent, the total flow rate of the clear water and the emulsification reagent mixed is conveniently measured through a flow meter, the flow meters 11 are respectively arranged at each flotation dosing point 13 to measure that the flow rates of the mixed emulsification reagents at each dosing point 13 are respectively Y1CV…YNCVAnd transmits the data to the control device 17;
e. and c, setting the dosing amount of each dosing point 13 as Y1SP … YNSP according to the requirement of the flotation production process, repeating the step c by the control device, and driving the dosing adjusting valve 12 to adjust the emulsified medicament flow of each dosing point 13 by the control device 17 so that the dosing flow stably tracks the set value.
One embodiment of the invention is as follows:
the medicament container 1 is a cylinder, the diameter is 325mm, and the height is 2000 mm;
the liquid level sensor 2 is a floating ball liquid level sensor with the model of SFMSE-1787-A11N-MEPSZ-AXXX;
the diameter of the medicament pipeline 4 is 26.7 mm;
the model of the medicament regulating valve 5 is BSDR-16P, Dn 20;
the diameter of the clean water pipeline 6 is 47 mm;
the model of the clear water pipeline pump 7 is ISW-160;
the model of the emulsification pump 8 is AYG-410-3;
the diameter of the emulsifying agent pipeline 9 is 47 mm;
the diameter of the medicine feeding pipe 10 is 26.7mm, and the number of the medicine feeding pipes is 3;
the flow meter 11 is of the UVMT-ANC3FAMDAA type;
the model of the dosing control valve 12 is BSDR-16P, Dn 20.
Claims (4)
1. The utility model provides a flotation device for coal agent measurement, regulation, interpolation device which characterized in that: it comprises a medicament container (1), a liquid level sensor (2), a floating ball (3), a medicament pipeline (4), a clean water pipeline (6), a clean water pipeline pump (7), an emulsification pump (8), an emulsification medicament pipeline (9), a medicament feeding pipe (10), a medicament regulating valve (5), a flow meter (11), a medicament feeding regulating valve (12), medicaments are contained in the medicament container (1), the liquid level sensor (2) is fixed at the upper end of the medicament container (1), the floating ball (3) floats on the liquid level of the medicaments, the floating ball (3) is connected with the liquid level sensor (2), the medicament pipeline (4) is arranged at the bottom of the medicament container (1) and is connected with the clean water pipeline (6), the clean water pipeline (6) is connected with the emulsification pump (8) through the clean water pipeline pump (7), the output end of the emulsification pump (8) is connected with the emulsification medicament pipeline (9), the emulsification medicament pipeline (9) is connected with the medicament feeding pipe, the front end of the dosing pipe (10) is opposite to a dosing point (13) of the flotation machine (14), a medicament adjusting valve (5) is installed in the medicament pipeline (4), a flow meter (11) and a dosing adjusting valve (12) are installed in the dosing pipe (10), and the liquid level sensor (2), the clean water pipeline pump (7), the emulsification pump (8), the medicament adjusting valve (5), the flow meter (11) and the dosing adjusting valve (12) are respectively connected with a control device (17) through signal cables (15).
2. The coal flotation machine reagent metering, adjusting and adding device according to claim 1, characterized in that: the medicament container (1) is a regular container with the same upper and lower sectional areas.
3. The coal flotation machine reagent metering, adjusting and adding device according to claim 1, characterized in that: the chemical feeding pipe (10) is provided with a plurality of chemical feeding pipes (10) which are opposite to a plurality of chemical feeding points (13) of the flotation machine (14), a flow meter (11) and a chemical feeding regulating valve (12) are respectively arranged in each chemical feeding pipe (10), and each flow meter (11) and each chemical feeding regulating valve (12) are connected with a control device (17) through a signal cable (15).
4. A method for metering, adjusting and adding a chemical agent of a coal flotation machine by using the device is characterized by comprising the following steps: the method comprises the following steps:
a. defining the digital or analog flotation reagent liquid level height signal 1 detected by the liquid level sensor (2) as H1Defining the outputted liquid level height signal 2 as H2The signal H is transmitted via a signal cable (15)1、H2Respectively transmit to controlling means (17), two acquisition time difference deltat, because the flotation liquid medicine holds in regular medicament container (1), the liquid level altitude variation is delta H = H1- H2The total amount of the drug flux is measured as Ycv- Δ H/Δ t, S being the cross-sectional area of the regular medicament container (1);
b. according to the dry coal slime amount of the fed ore pulp, a reasonable numerical value Y is set for the total adding amount of the flotation reagentspThe set value is also input into the control device (17) by a digital or analog signal;
c. calculating the total flow set value Y of the flotation reagentspWith the current measurement value Y of the total flow of the flotation agentcvWhen the difference value delta Y is greater than + X, the control device (17) drives the medicament regulating valve (5) to increase the opening degree so as to increase the medicament flow and enable the delta Y to fall back into the dead zone interval +/-X; when the delta Y is smaller than-X, the control device (17) drives the medicament regulating valve (5) to reduce the opening degree so as to reduce the medicament flow and enable the delta Y to fall back to the dead zone interval +/-X;
d. after the flotation agents with accurately metered total amount pass through an emulsification system consisting of a clear water pipeline pump (7) and an emulsification pump (8), the emulsification agents are fully dispersed into clear water, the emulsification agents and the fluid flow which is mixed with the emulsification agents are multiple times, the total flow of the clear water and the emulsification agents can be conveniently measured through a flow meter, the flow meter (11) is arranged at each flotation dosing point (13) to measure the flow of the emulsification agents after the mixing of the dosing points (13) to be Y1 respectivelyCV…YNCVAnd transmits the data to the control device (17);
e. the chemical adding amount of each chemical adding point () is set to be Y1 according to the requirement of the flotation production processSP…YNSPAnd c, repeating the step c by the control device (17), and driving the dosing regulating valve (12) by the control device (17) to regulate the flow of the emulsified medicament at each dosing point (13) so that the dosing flow stably tracks the set value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911177722.3A CN110961257A (en) | 2019-11-27 | 2019-11-27 | Device and method for metering, adjusting and adding chemicals of coal flotation machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911177722.3A CN110961257A (en) | 2019-11-27 | 2019-11-27 | Device and method for metering, adjusting and adding chemicals of coal flotation machine |
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| CN201911177722.3A Withdrawn CN110961257A (en) | 2019-11-27 | 2019-11-27 | Device and method for metering, adjusting and adding chemicals of coal flotation machine |
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| CN208512803U (en) * | 2017-12-31 | 2019-02-19 | 天津美腾科技有限公司 | A kind of flotation intelligent dosing station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU952342A2 (en) * | 1980-06-24 | 1982-08-23 | Pushko Andrej K | Liquid flow distributor |
| SU1678457A1 (en) * | 1989-12-25 | 1991-09-23 | Научно-исследовательский и проектно-конструкторский институт обогащения твердых горючих ископаемых | Apparatus for controlling column flotation process |
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Application publication date: 20200407 |