CN112610893A - Ore pulp pipeline conveying protection and control system - Google Patents
Ore pulp pipeline conveying protection and control system Download PDFInfo
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- CN112610893A CN112610893A CN202011472413.1A CN202011472413A CN112610893A CN 112610893 A CN112610893 A CN 112610893A CN 202011472413 A CN202011472413 A CN 202011472413A CN 112610893 A CN112610893 A CN 112610893A
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- feeding
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- stirring tank
- pipe
- conveying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/088—Pipe-line systems for liquids or viscous products for solids or suspensions of solids in liquids, e.g. slurries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/17—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by mixing with another liquid, i.e. diluting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Paper (AREA)
Abstract
The invention discloses an ore pulp pipeline conveying protection and control system which is characterized by comprising a feeding section, a conveying pipeline section, a dewatering section and a PLC (programmable logic controller), wherein the feeding section comprises an ore pulp feeding pipe, a feeding stirring tank discharging pipe, a feeding pump discharging pipe and a diaphragm pump, a sodium sulfite solution adding mechanism and a lime emulsion adding mechanism are arranged at the upper part of the feeding stirring tank, the ore pulp feeding pipe is arranged at the upper part of the feeding stirring tank, a concentration meter and a process water replenishing pipe are arranged on the feeding stirring tank discharging pipe, and an electric regulating valve I is arranged on the process water replenishing pipe. The invention has the advantages that: by adopting the ore pulp pipeline conveying protection system, the leakage and burst accidents of the conveying section are effectively avoided, the stability and the reliability of the system operation are improved, and the safety accidents are prevented.
Description
Technical Field
The invention belongs to the technical field of ore dressing plant pipelines, and particularly relates to an ore pulp pipeline conveying protection and control system.
Background
Currently, in the mine industry, the transportation of iron ore concentrate products mainly adopts the modes of belt conveying, train conveying and automobile conveying. The adoption of the modes has the characteristics of high energy consumption, large investment, poor terrain adaptability and the like and high labor cost. Therefore, a conveying mode with low energy consumption, small investment and good terrain adaptability is urgently needed to be found in the current mine.
The pipeline conveying can be overhead or buried due to small occupied area along the line, can be laid on mountains and mountains, and has good adaptability to complex terrains. By adopting the mode, the longest conveying of the ore pulp can reach hundreds of kilometers only by arranging a feeding pump at the source, a pressurizing facility is not needed, and a feeding and conveying energy supply system is simple, low in cost and low in investment. And the pipeline conveying mode is adopted, and compared with the belt, automobile or train conveying mode, the conveying cost can be reduced by 30-50%.
However, when the pipeline transportation system is adopted, the distance of the whole pipeline system can reach hundreds of kilometers, most of the pipeline system passes through mountains and mountains in the middle, and even is buried, so that the whole pipeline system is required to be free of maintenance within the service life of 20 years to 30 years, namely, the pipeline can be free of maintenance and can be used for the whole service life. The iron ore concentrate has the characteristics of high specific gravity and high particle hardness, so that the pipeline is easily abraded, and the pipeline can be corroded by dissolved oxygen in the ore pulp for a long time to cause pipeline corrosion and pipeline damage. And the pressure of the pipeline conveying process is often over 20Mpa, and the pipeline is required to be prevented from bursting due to misoperation. In addition, effective measures must be taken to prevent the slurry from leaking in the conveying section.
In summary, there is a need to develop a protection and control system that can effectively prevent the iron ore concentrate from being transported and worn, corroded, burst and leaked.
Disclosure of Invention
The invention aims to provide ore pulp pipeline conveying protection which can effectively prevent abrasion, corrosion, bursting and leakage during iron ore concentrate conveying.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a pulp pipeline conveying protection and control system which is characterized by comprising a feeding section, a conveying pipeline section, a dewatering section and a PLC (programmable logic controller),
the feeding section comprises an ore pulp feeding pipe, a feeding stirring tank discharging pipe, a feeding pump connected with the feeding stirring tank discharging pipe, a feeding pump discharging pipe and a diaphragm pump connected with the feeding pump discharging pipe, wherein a sodium sulfite solution adding mechanism and a lime emulsion adding mechanism are arranged at the upper part of the feeding stirring tank;
the conveying pipeline is a conveying pipeline section, the length of the conveying pipeline is set according to actual production requirements, the feeding end of the conveying pipeline is connected with the outlet of the diaphragm pump, and a pressure gauge is arranged on the conveying pipeline every 20km-30 km;
the dehydration section is arranged at the tail end of the conveying pipeline and comprises a stirring tank, a filter and a thickener, a stirring tank feeding branch pipe, a filter branch pipe and a thickener feeding branch pipe are arranged at the tail end of the conveying pipeline, the stirring tank feeding branch pipe is arranged corresponding to the stirring tank, the filter branch pipe is arranged corresponding to the filter, the thickener feeding branch pipe is arranged corresponding to the thickener, and electric switch valves are respectively arranged on the three feeding branch pipes;
the pressure gauge, the diaphragm pump and the electric switch valve are all connected with the PLC.
Preferably, ore pulp pipeline transportation protection and control system, its characterized in that, sodium sulfite solution add mechanism by sodium sulfite solution storage tank, arrange the material pipe with the sodium sulfite solution that sodium sulfite solution storage tank is connected sodium sulfite solution, set up eccentric screw pump I, flowmeter I and electrical control valve II on sodium sulfite solution row material pipe, the export and the feed stirred tank of sodium sulfite solution row material pipe are connected, eccentric screw pump I, flowmeter I and electrical control valve II be connected with the PLC controller.
Preferably, the lime milk adding mechanism comprises a lime milk solution storage tank, a lime milk solution discharging pipe connected with the lime milk solution storage tank, an eccentric screw pump II arranged on the lime milk solution discharging pipeline, a flow meter II and an electric regulating valve III, wherein the outlet of the lime milk solution discharging pipe is connected with the feeding stirring tank, and the eccentric screw pump II, the flow meter II and the electric regulating valve III are electrically connected with the PLC.
Preferably, a filter with mesh of 2mm-3mm is arranged on the conveying pipeline at the outlet of the diaphragm pump, and isolation valves are arranged in front of and behind the filter 11.
Preferably, the volume of the stirred tank is stored for 6 to 8 hours of the delivery volume of the delivery line.
Preferably, the pressure gauge is provided with a low-pressure alarm and a high-pressure alarm, and the low-pressure alarm pressure value is set to be 70% -80% of the normal pressure value.
Preferably, the eccentric screw pump I and the eccentric screw pump II are driven by variable frequency motors.
The invention has the advantages that:
by adopting the ore pulp pipeline conveying protection system, the leakage and burst accidents of the conveying section are effectively avoided, the stability and the reliability of the system operation are improved, the safety accidents are prevented, and meanwhile, the components in the system are monitored by designing devices such as a concentration meter, a manometer and a related electric regulating valve, so that the service life of the system is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and fig. 2, the ore pulp pipeline conveying protection and control system of the invention is characterized by comprising a feeding section, a conveying pipeline section, a dewatering section and a PLC controller,
the feeding section comprises an ore pulp feeding pipe 6, a feeding stirring tank 1, a feeding stirring tank discharging pipe 2, a feeding pump 3 connected with the feeding stirring tank discharging pipe 2, a feeding pump discharging pipe 4 and a diaphragm pump 5 connected with the feeding pump discharging pipe 4, wherein a sodium sulfite solution adding mechanism 7 and a lime emulsion adding mechanism 8 are arranged at the upper part of the feeding stirring tank 1, and the ore pulp feeding pipe 6 is arranged at the upper part of the feeding stirring tank 1; a concentration meter 21 and a process water replenishing pipe 19 are arranged on the discharging pipe 2 of the feeding stirring tank, an electric regulating valve I20 is arranged on the process water replenishing pipe 19, and the volume of the feeding stirring tank 1 is stored for 6-8 hours of ore pulp pipeline conveying capacity.
Because the iron ore concentrate has high specific gravity and is easy to deposit at the lower part of the feeding stirring tank, the discharging concentration of the feeding stirring tank is higher than the conveying concentration, and the abrasion of a pipeline can be increased when the conveying concentration is too high. Therefore, the system provided by the invention has the advantages that the concentration meter is arranged on the discharge pipe of the feeding stirring tank of the feeding section, the concentration of discharged materials is monitored in real time, and the water supplementing quantity is adjusted by automatically interlocking and adjusting the opening degree of the electric adjusting valve I on the process water supplementing pipe, so that the concentration of discharged materials is controlled at the set concentration, the abrasion of the pipeline is favorably reduced, the automatic interlocking control is realized, the control precision is high, and the manual operation is not needed.
The sodium sulfite solution adding mechanism 7 comprises a sodium sulfite solution storage tank 71, a sodium sulfite solution discharging pipe 72 connected with the sodium sulfite solution storage tank, an eccentric screw pump I73, a flow meter I74 and an electric regulating valve II 75 which are arranged on the sodium sulfite solution discharging pipe 72, wherein the outlet of the sodium sulfite solution discharging pipe is connected with the feeding stirring tank 1, and the eccentric screw pump I73, the flow meter I74 and the electric regulating valve II 75 are also connected with a PLC controller.
Be equipped with sodium sulfite solution at the feeding section and add the mechanism, through adding 1% -2% sodium sulfite solution to the feeding section feed stirred tank in the concentration, the dissolved oxygen in the absorption ore pulp that this part sodium sulfite can be abundant has avoided the corruption of dissolved oxygen's existence to the pipeline transportation, the pipeline of favorable protection.
The lime emulsion adding mechanism 8 comprises a lime emulsion solution storage tank 81, a lime emulsion solution discharge pipe 82 connected with the lime emulsion solution storage tank 81, an eccentric screw pump II 83, a flow meter II 84 and an electric regulating valve III 85 arranged on the lime emulsion solution discharge pipe 82, wherein the outlet of the lime emulsion solution discharge pipe is connected with the feeding stirring tank 1, and the eccentric screw pump II 83, the flow meter II 84 and the electric regulating valve III 85 are also electrically connected with a PLC (programmable logic controller).
The eccentric screw pump I73 and the eccentric screw pump II 83 are driven by variable frequency motors.
According to the system, the feeding section is provided with the lime emulsion adding mechanism, the lime emulsion with the concentration of 5% -10% is added into the feeding section feeding stirring tank, and the lime emulsion is added, so that calcium hydroxide reacts to form calcium carbonate to form a scale layer on the inner wall of the pipeline in the conveying process, the contact between ore particles and the metal inner wall of the pipeline can be favorably prevented, and the abrasion of the pipeline is effectively prevented.
The conveying pipeline section is a conveying pipeline 9, the length of the conveying pipeline 9 is set according to actual production requirements, the feed end of the conveying pipeline 9 is connected with the outlet of a diaphragm pump 5, and a pressure gauge 10 is arranged on the conveying pipeline 9 every 20km-30 km; the pressure gauge 10 is provided with a low-pressure alarm and a high-pressure alarm, and the low-pressure alarm pressure value is set to be 70% -80% of the normal pressure value.
In the system, a filter 11 with mesh of 2mm-3mm is arranged on a conveying pipeline 9 at the outlet of the diaphragm pump 5, and isolation valves 12 are arranged in front of and behind the filter 11. The device effectively prevents overlarge particles and sundries from entering the pipeline, effectively prevents the pipeline from being worn by the overlarge and overhigh sundries, and protects the pipeline. And the isolating valves are arranged in front of and behind the filter, so that when the filter is blocked, the filter can be quickly replaced by closing the isolating valves.
A pressure gauge 10 is arranged on the conveying pipeline 9 every 20-30km, when the pipeline leaks, the pressure is reduced to 70% -80% of the normal pressure value, automatic alarming is carried out, and signals are transmitted to a control room, so that the PLC can automatically judge the conveying section where the leakage point is located, the leakage point investigation time is greatly reduced, the pipeline repair is facilitated as soon as possible, and the pipeline is protected.
The dehydration section is arranged at the tail end of a conveying pipeline 9 and comprises a stirring tank 16, a filter 17 and a concentrator 18, the tail end of the conveying pipeline 9 is provided with a stirring tank feeding branch pipe 13, a filter branch pipe 14 and a concentrator feeding branch pipe 15, the stirring tank feeding branch pipe 13 is arranged corresponding to the stirring tank 16, the filter branch pipe 14 is arranged corresponding to the filter 17, the concentrator feeding branch pipe 15 is arranged corresponding to the concentrator 18, and three feeding branch pipes are respectively provided with an electric switch valve;
the working mode of the dehydration section is as follows:
1) when the electric switch valves of the filter and the thickener are not opened once in misoperation, the system automatically opens the electric switch valve arranged on the stirring tank material feeding branch pipe, and ore pulp can be discharged to the stirring tank in an emergency manner;
2) during normal production, the stirring tank feeding branch pipe and the electric switch valve of the thickener are closed, the electric switch valve on the filtering machine feeding branch pipe is opened, ore pulp is fed into the filtering machine for dehydration operation, and a filtering product is a final product;
3) when the filter stops due to a fault, the electric switch valves on the feeding branch pipes of the filter and the feeding branch pipes of the concentrator are closed, the electric switch valve of the stirring tank is opened, ore pulp is fed into the stirring tank for buffering, the buffering time is 6-8 hours, the filter is overhauled by utilizing the time, if the time is 6-8 hours, the filter still cannot normally work, and the whole conveying system stops; when the production of the filtering workshop is recovered, the ore pulp is conveyed to the filtering machine through the conveying pump in the stirring tank;
4) when the pipeline is washing water, the valves on the feeding branch pipes of the filtering machine and the stirring tank are closed, the valve on the feeding branch pipe of the thickener is opened, ore pulp is fed to the thickener, and the concentrated bottom flow is conveyed to the filtering machine through the bottom flow pump.
According to the system disclosed by the invention, when the electric switch valves of the filter and the thickener are not opened once in misoperation, the system automatically opens the electric switch valve arranged on the feeding branch pipe of the stirring tank, so that ore pulp can be discharged to the stirring tank in an emergency manner. The automatic interlocking detection ensures that at least one ore pulp outlet is arranged at the tail end of the pipeline, so that the pipeline burst caused by the continuous increase of the pressure in the pipeline due to the totally closed tail end of the pipeline is avoided, and the conveying pipeline is favorably protected.
The pressure gauge 10, the motor of the diaphragm pump 5, the variable frequency motor of the eccentric screw pump, the motor of the delivery pump, the flow meter, the pressure gauge, the electric regulating valve I, the electric regulating valve II, the electric regulating valve III and each electric switch valve are connected with the PLC.
The PLC controller is used as a control center of the system, mainly manages and controls related components of the system, and is responsible for reading data, transmitting information and analyzing and judging related data to form a control instruction. The coordination management and control of the whole ore pulp pipeline conveying system are formed, so that the operation of the ore pulp pipeline conveying system is more reliable and stable, the remote operation can be realized, the automation degree is high, no field operator needs to be arranged, and the labor cost is reduced.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or 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.
Claims (7)
1. A pulp pipeline conveying protection and control system is characterized by comprising a feeding section, a conveying pipeline section, a dewatering section and a PLC (programmable logic controller),
the feeding section comprises an ore pulp feeding pipe, a feeding stirring tank discharging pipe, a feeding pump connected with the feeding stirring tank discharging pipe, a feeding pump discharging pipe and a diaphragm pump connected with the feeding pump discharging pipe, wherein a sodium sulfite solution adding mechanism and a lime emulsion adding mechanism are arranged at the upper part of the feeding stirring tank;
the conveying pipeline is a conveying pipeline section, the length of the conveying pipeline is set according to actual production requirements, the feeding end of the conveying pipeline is connected with the outlet of the diaphragm pump, and a pressure gauge is arranged on the conveying pipeline every 20km-30 km;
the dehydration section is arranged at the tail end of the conveying pipeline and comprises a stirring tank, a filter and a thickener, a stirring tank feeding branch pipe, a filter branch pipe and a thickener feeding branch pipe are arranged at the tail end of the conveying pipeline, the stirring tank feeding branch pipe is arranged corresponding to the stirring tank, the filter branch pipe is arranged corresponding to the filter, the thickener feeding branch pipe is arranged corresponding to the thickener, and electric switch valves are respectively arranged on the three feeding branch pipes;
the pressure gauge, the diaphragm pump and the electric switch valve are all connected with the PLC.
2. The ore pulp pipeline transportation protection and control system of claim 1, wherein the sodium sulfite solution adding mechanism comprises a sodium sulfite solution storage tank, a sodium sulfite solution discharge pipe connected with the sodium sulfite solution storage tank, an eccentric screw pump I, a flow meter I and an electric control valve II arranged on the sodium sulfite solution discharge pipe, wherein an outlet of the sodium sulfite solution discharge pipe is connected with the feeding stirring tank, and the eccentric screw pump I, the flow meter I and the electric control valve II are connected with the PLC.
3. The ore pulp pipeline conveying protection and control system according to claim 1, wherein the lime milk adding mechanism comprises a lime milk solution storage tank, a lime milk solution discharging pipe connected with the lime milk solution storage tank, an eccentric screw pump II, a flow meter II and an electric regulating valve III which are arranged on the lime milk solution discharging pipe, an outlet of the lime milk solution discharging pipe is connected with the feeding stirring tank, and the eccentric screw pump II, the flow meter II and the electric regulating valve III are electrically connected with the PLC.
4. The pulp pipeline transportation protection and control system according to claim 1, wherein a filter with mesh size of 2mm-3mm is arranged on the transportation pipeline at the outlet of the diaphragm pump, and isolation valves are arranged in front of and behind the filter.
5. The pulp pipeline transportation protection and control system of claim 1, wherein the volume of the agitation tank stores the transportation volume of the pipeline for 6-8 hours.
6. The pulp pipeline transportation protection and control system according to claim 1, wherein a low pressure alarm and a high pressure alarm are provided on the pressure gauge, and the low pressure alarm pressure value is set to 70% -80% of the normal pressure value.
7. The pulp pipeline transportation protection and control system according to claim 1, wherein the eccentric screw pump I and the eccentric screw pump II are driven by variable frequency motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011472413.1A CN112610893A (en) | 2020-12-15 | 2020-12-15 | Ore pulp pipeline conveying protection and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011472413.1A CN112610893A (en) | 2020-12-15 | 2020-12-15 | Ore pulp pipeline conveying protection and control system |
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| Publication Number | Publication Date |
|---|---|
| CN112610893A true CN112610893A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011472413.1A Pending CN112610893A (en) | 2020-12-15 | 2020-12-15 | Ore pulp pipeline conveying protection and control system |
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| CN (1) | CN112610893A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114791088A (en) * | 2022-04-06 | 2022-07-26 | 云南大红山管道有限公司 | Adding device and adding control method for lime milk in slurry pipeline |
-
2020
- 2020-12-15 CN CN202011472413.1A patent/CN112610893A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114791088A (en) * | 2022-04-06 | 2022-07-26 | 云南大红山管道有限公司 | Adding device and adding control method for lime milk in slurry pipeline |
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