CN213942198U - Automatic early warning device for muddy running of flotation phosphate concentrate thickener - Google Patents
Automatic early warning device for muddy running of flotation phosphate concentrate thickener Download PDFInfo
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- CN213942198U CN213942198U CN202022871115.1U CN202022871115U CN213942198U CN 213942198 U CN213942198 U CN 213942198U CN 202022871115 U CN202022871115 U CN 202022871115U CN 213942198 U CN213942198 U CN 213942198U
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Abstract
The utility model discloses an automatic early warning device that flotation phosphate concentrate thickener ran muddy belongs to phosphoric acid production machinery technical field. The device comprises a thickener, a siphon, a controller and an overflow tank, wherein the thickener comprises a clarification layer, a water suction end and a water outlet end of the siphon are respectively positioned in the clarification layer and the overflow tank, the height of the water outlet end of the siphon is lower than that of the water suction end of the siphon, a back flushing pipe and a first control valve are arranged on the siphon, and a second control valve is arranged on the back flushing pipe; the controller comprises an audible and visual alarm and a signal operation control unit which are electrically connected; the water outlet end of the siphon is provided with a water outlet pipe for measurement, a water quality detector is arranged on the water outlet pipe for measurement, and the water quality detector is electrically connected with the controller. The utility model has the advantages that: the water quality detector is adopted to detect and compare overflow water of the siphon pipe and give an early warning on the running and mixing conditions, so that the loss caused by running and mixing can be avoided; the water quality detector is arranged on the outer side of the thickener, and is convenient to overhaul and replace.
Description
Technical Field
The utility model belongs to the technical field of phosphoric acid production machinery, specifically be a flotation phosphate concentrate thickener runs muddy automatic early warning device.
Background
The thickener (also called thickener) is suitable for dewatering concentrate and tailings in concentrating mill, and can raise the solid content of concentrate and tailings by means of gravitational settling principle. During the production of phosphate concentrate, a thickener is used to increase the solid content of phosphate concentrate (from 20% to 55% and then to the subsequent stages). The thickener has larger volume, is generally operated in the open air and has poorer environment; the phosphate concentrate slurry is acidic. When the water body is observed manually, the water body condition at the depth of 30cm can be seen. The sampling pot is adopted for measurement, and the water body condition of 80cm depth can be detected at most. The original muddy running early warning meter for the phosphate concentrate slurry has the advantages that the service life is short due to slurry siltation and easy rusting of the wall of the thickener, the damage failure frequency is high, once the alarm is damaged, the alarm cannot be put into use again, the height of a clear water layer in the thickener does not have an effective monitoring measure, the early warning and the real-time monitoring on the muddy running of the concentrate are basically lost, and the concentrate is lost.
The document application of a thickener overflow muddy-running early warning device introduces a simple prevention device, the device siphons out liquid in a clarification layer of the thickener by utilizing a siphoning principle, the clarity of overflow water in the clarification layer is manually monitored, muddy running can be prevented in advance by 1-1.5 hours, but people must be dispatched to regularly patrol whether the drainage at an outlet of a siphon is clear, the technology solves the prevention problem, but the automatic alarm function is not realized, and the problem of manual regular monitoring is needed.
Chinese patent: a submerged type acousto-optic early warning device (application number 202010573108.5) for preventing the thickener from running muddy is disclosed, a luminous source and a photoresistor are fixed in a pool of the thickener through a floating box, and whether the thickener runs muddy or not is judged by measuring the light transmittance of water in the pool. The detection part of the early warning device is positioned underwater, and the early warning device needs to be lifted out during inspection and maintenance, so that the inspection and maintenance are inconvenient, and the overwater operation is dangerous to some extent.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flotation phosphate concentrate thickener runs muddy automatic early warning device solves traditional thickener and runs muddy early warning table life weak point, damages the problem that the frequency of failure is high and can not realize automatic alarm and automatic early warning device and has the device inspection, maintain inconvenient, and the operation on water has certain dangerous problem.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
an automatic early warning device for muddy running of a flotation phosphate concentrate thickener comprises the thickener, a siphon, a controller and an overflow pool, wherein the thickener comprises a clarification layer, the water suction end of the siphon is positioned in the clarification layer, the water outlet end of the siphon is positioned in the overflow pool, the height of the water outlet end of the siphon is lower than that of the water suction end of the siphon, a back-flushing pipe and a first control valve are arranged on the siphon, and a second control valve is arranged on the back-flushing pipe; the controller comprises an audible and visual alarm and a signal operation control unit, the audible and visual alarm and the signal operation control unit are electrically connected, a water outlet pipe for measurement is installed at the water outlet end of the siphon pipe, a water quality detector is installed on the water outlet pipe for measurement, and the water quality detector is electrically connected with the controller.
Furthermore, the water quality detector comprises a penetration hole and a detection hole, the axes of the penetration hole and the detection hole are positioned on the same cross section of the water outlet pipe for measurement, transparent plates are arranged on the inner sides of the penetration hole and the detection hole, an incident light source is arranged in the incident hole, a silicon photocell is arranged in the detection hole, and the incident light source and the silicon photocell are electrically connected with the controller. The light emitted by the incident light source is obtained by the silicon photocell after being projected or diffracted, and the silicon photocell emits a voltage signal corresponding to the light intensity to the controller.
Furthermore, the end part of the water outlet pipe for measurement is provided with a 90-degree elbow. Avoid the external light pollution at the water outlet.
Furthermore, the conducting wires of the silicon photocell are provided with electromagnetic shielding layers. And the misjudgment caused by the interference of an external electromagnetic disturbance source on the signal output by the silicon photocell is avoided.
Furthermore, two siphons are adopted, the water absorbing end of one siphon is positioned at the lower part of the clarification zone, the water absorbing end of the other siphon is positioned at the upper part of the clarification zone, and the water outlet ends of the two siphons are both positioned in the overflow tank. The overflow water discharged from the siphon pipe with the water suction end positioned at the upper part of the clarification zone is used as the contrast of the overflow water discharged from the siphon pipe with the water suction end positioned at the lower part of the clarification zone, so that the influence caused by water quality change can be eliminated, and the early warning is more accurate.
Furthermore, the water outlet ends of the two siphons are provided with flow rate meters. The water outlet speeds of the two siphons are ensured to be equal, and the water quality detector is convenient to detect and compare the clarity of the overflow water.
After having adopted above technical scheme, the beneficial effects of the utility model are that:
1. the overflow water of the siphon pipe is detected in real time through the water quality detector, and the running muddy state is pre-warned through the audible and visual alarm, so that the loss caused by the running muddy state can be avoided.
2. The water quality detector is arranged outside the thickener, is safe and convenient to overhaul and is quick to replace.
3. When two siphons are adopted, the false alarm caused by water quality change and the influence of system errors can be eliminated, and the measurement is more accurate.
Drawings
Fig. 1 is a schematic view of embodiment 1 of the present invention.
Fig. 2 is a schematic cross-sectional view of a water quality detector in embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional view of a water quality detector in embodiment 2 of the present invention.
Fig. 4 is a schematic view of embodiment 3 of the present invention.
In the figure: 1-a thickener, 11-a clarification layer, 2-a siphon pipe, 21-a first backwashing pipe, 211-a second control valve, 22-a first control valve, 3-a controller, 4-an overflow tank, 5-a water pipe for measurement, 6-a water quality detector, 61-an incident hole, 62-a detection hole and 7-a flow meter.
Detailed Description
The technical solution of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
Example 1
Fig. 1 shows an automatic early warning device for muddy running of a flotation phosphate concentrate thickener, which comprises a thickener 1, a siphon 2, a controller 3 and an overflow tank 4, wherein the thickener 1 comprises a clarification layer 11, the water suction end of the siphon 2 is positioned in the clarification layer 11, the water outlet end of the siphon 2 is positioned in the overflow tank 4, the height of the water outlet end of the siphon 2 is lower than that of the water suction end of the siphon 2, a back-flushing pipe 21 and a first control valve 22 are arranged on the siphon 2, and a second control valve 211 is arranged on the back-flushing pipe 21; the controller 3 comprises an audible and visual alarm 32 and a signal operation control unit 31, the audible and visual alarm 32 is electrically connected with the signal operation control unit 31, a water outlet pipe 5 for measurement is installed at the water outlet end of the siphon pipe 2, a water quality detector 6 is installed on the water outlet pipe 5 for measurement, and the water quality detector 6 is electrically connected with the controller 3.
The depth of the siphon 2 inserted into the clarification layer 11 from the overflow water surface of the thickener is 1.5m, and the water outlet end of the siphon 2 is positioned in the overflow tank 4. The siphon 2 adopts DN30 steel skeleton composite pipe, and the back-flushing pipe 21 adopts DN20 steel skeleton composite pipe. The first control valve 22 and the second control valve 211 are ball valves.
The water quality detector 6 comprises an incident hole 61 and a detection hole 62, the axes of the incident hole 61 and the detection hole 62 are positioned on the same cross section of the water outlet pipe 5 for measurement, transparent plates are respectively arranged on the inner sides of the incident hole 61 and the detection hole 62, an incident light source is arranged in the incident hole 61, a photoelectric conversion device is arranged in the detection hole 62, and the incident light source and the photoelectric conversion device are electrically connected with the controller 3.
In the present embodiment, as shown in fig. 2, the incident hole 61 and the detection hole 62 are located on a straight line, and the photoelectric converter is used to detect the intensity of the transmitted light in the gap between the solid particles in the overflow water.
The transparent plates arranged at the inner sides of the entry hole 61 and the detection hole 62 are made of acrylic resin glass. The incident light source adopts a laser diode, the wavelength is 650nm, and the input voltage is 5V.
The photoelectric conversion device adopts a TCZ6 multiplied by 6 silicon photocell which has the advantage that the short-circuit current and the incident light intensity have good linear relation.
The signal operation control unit adopts a C8051F020 singlechip, and the singlechip amplifies and compares current signals output by the silicon photocell.
The audible and visual alarm operating voltage is preferably DC12V in view of near water operation.
The end part of the water outlet pipe 5 for measurement is provided with a 90-degree elbow, so that the external light pollution at the water outlet is avoided.
The wire of the silicon photocell is provided with an electromagnetic shielding layer, so that the misjudgment caused by the interference of an external electromagnetic disturbance source on the signal output by the silicon photocell is avoided.
The working process of the embodiment is as follows:
establishing a working state of a siphon: the first control valve 22 is closed, and the second control valve 211 is opened to fill the siphon tube 2 with water. After the siphon 2 is filled with water, the second control valve 211 is closed, the first control valve 22 is opened, and the water in the clarification layer 11 flows along the siphon into the overflow tank 4, and the siphon starts to operate.
Starting running and muddy early warning: the controller 3 is powered on, the laser diode emits light, the silicon photocell receives the transmitted light of the overflow water, the water quality detector 6 starts to work, and the transmitted light is converted into an electric signal to be sent to the signal operation control unit 31.
A run-muddy early warning judgment process: first, the signal of the clear water transmitted light is set in the signal arithmetic control unit 31 as a reference signal for comparison of the running and muddy signal. When the thickener does not run muddy, the solid content of the overflow water discharged by the siphon 2 is close to that of clear water, the difference between the transmission light signal of the overflow water sent by the water quality detector 6 and the comparison reference signal is small, and the signal operation control unit 31 judges that the thickener does not run muddy according to the difference. When the solid content of the water discharged from the siphon tube 2 is increased, the difference between the transmission light signal of the water discharged from the siphon tube 2 and the reference signal is larger, the signal operation control unit 31 judges that the thickener runs muddy, and controls the audible and visual alarm 32 to send out an alarm signal to remind a worker to take measures to prevent the running muddy, so that the loss of the phosphate concentrate is avoided.
Because the height difference of 1.5m is formed between the water suction end of the siphon 2 and the overflow water surface of the thickener, the processing time of 2-2.5 hours is left for operators.
Example 2
Other conditions were the same as in example 1, and only the angles of the entry hole 61 and the detection hole 62 were changed. As shown in fig. 3, the incident hole 61 and the detection hole 62 have axes perpendicular to each other, and are used to detect the intensity of diffracted light of solid particles in overflow water. The detection mode is less influenced by the size of solid particles in the overflow water, and higher accuracy can be obtained even if particles with different sizes exist in the overflow water sample.
Example 3
Other conditions were the same as in example 2, and two siphon tubes 2 were used. As shown in fig. 4, each siphon pipe 2 is provided with a flow rate meter, which is of a turbine type. The first control valve 22 is adjusted so that the flow rate of water in the two siphon tubes 2 is the same. The suction inlet of one siphon 2 is inserted into the upper part of the clarification layer 11 and is 1.1m away from the water surface, and the suction inlet of the other siphon 2 is inserted into the lower part of the clarification layer 11 and is 1.5m away from the water surface. The clarity of the overflow water discharged by the two siphons 2 is close to that of the overflow water discharged by the thickener under the condition that the thickener does not run and mix, the transmission light signals of the overflow water sent by the water quality detectors 6 on the two siphons 2 are close to that of the overflow water, and the signal operation control unit 31 judges that the thickener does not run and mix; the clarity of the overflow water discharged by the two siphons 2 has larger deviation under the condition that the thickener runs and mixes, the numerical value of the overflow water transmission light signal sent by the water quality detectors 6 on the two siphons 2 has larger deviation, and the signal operation control unit 31 judges that the thickener runs and mixes and informs the acousto-optic alarm 32 to send an alarm signal to remind a worker to take measures to prevent running and mixing and avoid loss of phosphate concentrate. The two siphons 2 have a height difference of 0.4m (1.5 m-1.1m) at their water suction ends, which leaves the operator with a treatment time of 1-1.5 hours.
In this embodiment, two siphon pipes 2 are used to eliminate the false alarm caused by the water quality variation and the influence of the system error.
The utility model has the advantages that:
1. whether the overflow water of the siphon pipe runs muddy in the thickener is judged by detecting the overflow water of the siphon pipe through the water quality detector 6, and the running muddy condition is pre-warned through the audible and visual alarm, so that the loss caused by the running muddy condition is avoided. Through practice, before the device is installed, the thickener runs muddy to cause 16 times of shutdown every year, the shutdown time due to the muddy influence is 38.72 hours, the phosphate concentrate loss is 321.36t, the average phosphate concentrate loss after the device is installed is reduced to 29.56t, and the loss is reduced by 22 ten thousand yuan every year.
2. The water quality detector 6 is arranged on the siphon 2 outside the thickener 1, so that inspection, overhaul and replacement are convenient, and potential safety hazards of overwater operation do not exist.
3. When two siphons 2 are adopted, the false alarm caused by water quality change and the influence of system errors can be eliminated, and the measurement is more accurate.
The first and second ordinal modifiers in the description of the invention are used only to indicate the distinction between parts for convenience of description and should not be construed as limitations on the claims of the invention.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. The automatic early warning device for muddy running of the flotation phosphate concentrate thickener comprises the thickener (1), a siphon (2), a controller (3) and an overflow tank (4), wherein the thickener (1) comprises a clarification layer (11), the water absorption end of the siphon (2) is positioned in the clarification layer (11), the water outlet end of the siphon (2) is positioned in the overflow tank (4), the height of the water outlet end of the siphon (2) is lower than that of the water absorption end of the siphon (2), a back flushing pipe (21) and a first control valve (22) are arranged on the siphon (2), and a second control valve (211) is arranged on the back flushing pipe (21); the method is characterized in that: the controller (3) contain audible-visual annunciator (32) and signal operation the control unit (31), the electricity is connected between audible-visual annunciator (32) and signal operation the control unit (31), outlet pipe (5) are installed to the play water end of siphon (2) and are used in the measurement, install water quality detector (6) on outlet pipe (5) are used in the measurement, water quality detector (6) are connected with controller (3) electricity.
2. The automatic early warning device for the running muddy of the flotation phosphate concentrate thickener according to claim 1, wherein the automatic early warning device comprises: the water quality detector (6) comprises an inlet hole (61) and a detection hole (62), the axes of the inlet hole (61) and the detection hole (62) are located on the same cross section of the water outlet pipe (5) for measurement, transparent plates are arranged on the inner sides of the inlet hole (61) and the detection hole (62), an incident light source is arranged in the inlet hole (61), a photoelectric conversion device is arranged in the detection hole (62), and the incident light source and the photoelectric conversion device are electrically connected with the controller (3).
3. The automatic early warning device for the running muddy of the flotation phosphate concentrate thickener according to claim 1, wherein the automatic early warning device comprises: the end part of the water outlet pipe (5) for measurement is provided with a 90-degree elbow.
4. The automatic early warning device for the running muddy of the flotation phosphate concentrate thickener according to claim 2, wherein the automatic early warning device comprises: the transmission wire of the photoelectric conversion device is provided with an electromagnetic shielding layer.
5. The automatic early warning device for the running muddy of the flotation phosphate concentrate thickener according to claim 1, wherein the automatic early warning device comprises: the two siphons (2) are adopted, the water absorbing end of one siphon (2) is positioned at the lower part of the clarification layer (11), the water absorbing end of the other siphon (2) is positioned at the upper part of the clarification layer (11), and the water outlet ends of the two siphons (2) are both positioned in the overflow tank (4).
6. The automatic early warning device for the running muddy of the flotation phosphate concentrate thickener according to claim 5, wherein the automatic early warning device comprises: and flow velocity meters (7) are respectively installed at the water outlet ends of the two siphons (2).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307264A (en) * | 2021-12-17 | 2022-04-12 | 中国矿业大学 | Device and method for rapidly detecting height of clarified water layer of slime water thickener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307264A (en) * | 2021-12-17 | 2022-04-12 | 中国矿业大学 | Device and method for rapidly detecting height of clarified water layer of slime water thickener |
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