CN102182928B - Intelligent measuring system and method for transport volume of ore pulp pipes - Google Patents
Intelligent measuring system and method for transport volume of ore pulp pipes Download PDFInfo
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- CN102182928B CN102182928B CN 201110026592 CN201110026592A CN102182928B CN 102182928 B CN102182928 B CN 102182928B CN 201110026592 CN201110026592 CN 201110026592 CN 201110026592 A CN201110026592 A CN 201110026592A CN 102182928 B CN102182928 B CN 102182928B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 202
- 239000012141 concentrate Substances 0.000 claims abstract description 104
- 229910052742 iron Inorganic materials 0.000 claims abstract description 101
- 238000004519 manufacturing process Methods 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 claims description 3
- 238000010009 beating Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000013055 pulp slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
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Abstract
The invention relates to an intelligent measuring system and method for transport volume of ore pulp pipes. The intelligent measuring system for the transport volume of the ore pulp pipes comprises a ore pulp pipe (1), a positive displacement piston diaphragm pump (2), a concentration measuring apparatus (3), a belt conveyer scale (4), a PLC (programmable logic control) system (5), an SCADA (supervisory control and data acquisition) control system (6), an integrative management and control system (7), an intelligent measuring system (8) and a pipe pulp delivering and measuring system displaying interface (9). The intelligent measuring system collects the data of ore pulp concentration and ore pulp volume through the positive displacement piston diaphragm pump, the concentration measuring apparatus and the PLC system, and obtains the volume and quality of iron ore concentrate pulp in one section of the pipe, the quality of iron ore concentrate in the whole pipe and the quality of production water in the whole pipe according to a computational formula, therefore, all parameters for transportation in the whole pipe are monitored precisely.
Description
Technical Field
The invention relates to an intelligent measuring system and a measuring method for ore pulp pipeline transportation capacity, in particular to an intelligent measuring system and a measuring method for iron ore concentrate pipeline transportation flow.
Background
In the process of transporting the iron ore concentrate pipeline, because the ore pulp slurry is the special physical property of the mixture of the solid iron ore concentrate and the liquid water, the transportation, flow measurement and metering of the long-distance ore pulp pipeline are always the problems which are difficult to solve in the industry. At present, no instrument can accurately measure the flow of the iron ore concentrate pulp slurry worldwide. If a traditional flow meter for measuring water is used, the content, the volume and the specific content of each component of the mixture of the solid iron concentrate and the liquid water cannot be accurately measured.
The slurry flow is necessary monitoring data in the ore pulp conveying process, and is particularly important for safe and stable operation of iron ore concentrate pipeline transportation. The iron ore concentrate pulp passing through the pulp pipeline usually undergoes a dehydration process, and the dehydrated ore powder is subjected to bearing by a belt weigher, so that the mass of the iron ore concentrate powder is calculated. If a fault occurs in pipeline transportation, part of iron ore concentrate is left in the pipeline and is not transported out, the fault of the whole transportation system and even a safety accident can be caused.
Therefore, it is very important to design an intelligent measuring system and method for the ore pulp pipeline transportation volume.
Disclosure of Invention
The invention designs an intelligent measuring system and a measuring method for the transportation volume of an ore pulp pipeline, which solve the technical problems that (1) the flow measurement and the component measurement of iron ore concentrate ore pulp in the pipeline cannot be carried out in the long-distance solid material pipeline conveying process; (2) it is not possible to determine whether the iron concentrate in the pipeline is completely transported out of the transport pipeline, and it is not possible to ensure the safety and stability of the entire transport pipeline.
In order to solve the technical problems, the invention adopts the following scheme:
the utility model provides an intelligence measurement system of ore pulp pipeline fortune volume which characterized in that: comprises that
One or more slurry pipes (1), wherein the slurry pipes (1) are used for conveying iron ore concentrate slurry;
one or more positive displacement piston diaphragm pumps (2), wherein the positive displacement piston diaphragm pumps (2) are used for pressurizing ore pulp in the ore pulp pipeline (1), and the fixed pump cavity of the positive displacement piston diaphragm pumps is used for measuring the volume of iron ore concentrate pulp pumped by the iron ore concentrate pulp in a certain time or a certain stroke;
one or more concentration meters (3) for metering the iron concentrate pulp concentration in the pulp conduit (1);
a PLC control system (5) for controlling the positive displacement piston diaphragm pump (2) and the concentration meter (3) and collecting iron concentrate slurry volume and iron concentrate slurry concentration values measured by the positive displacement piston diaphragm pump (2) and the concentration meter (3);
and the SCADA control system (6) is used for receiving the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value acquired by the PLC control system (5), and calculating the iron ore concentrate slurry volume and the iron ore concentrate slurry mass in the first section of the slurry pipeline (1), the iron ore concentrate mass in the whole pipeline and the mass of the production water in the whole pipeline.
Further, the system also comprises a belt scale (4) which is used for metering the dehydrated iron ore concentrate; the belt weigher (4) sends the quality data of the anhydrous iron ore concentrate to the SCADA control system (6) through the PLC control system (5), and the SCADA control system (6) compares the measured value of the belt weigher (4) with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline.
Further, the system comprises a management and control integrated system (7), wherein the management and control integrated system (7) is in remote monitoring and management with the SCADA control system (6) through a network.
Further, still include long-range intelligent measurement system (8), long-range intelligent measurement system (8) pass through the network with PLC control system (5) are connected, and direct collection the iron ore concentrate ore pulp volume and the iron ore concentrate ore pulp concentration numerical value that PLC control system (5) gathered to calculate the quality of iron ore concentrate ore pulp volume, iron ore concentrate ore pulp quality, the iron ore concentrate quality in the whole pipeline and the interior production water of whole pipeline.
Further, the belt weigher (4) sends the quality data of the anhydrous iron ore concentrate to the remote intelligent metering system (8) through the PLC control system (5), and the remote intelligent metering system (8) compares the measured value of the belt weigher (4) with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline.
Further, the remote intelligent metering system (8) also comprises a pipeline slurry conveying metering system display interface (9).
Further, the concentration meter (3) is an ultrasonic concentration meter.
An intelligent measurement method for the transportation quantity of a pulp pipeline comprises the following steps:
step I: the PLC control system (5) collects the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value measured by the positive displacement piston diaphragm pump (2) and the concentration measuring instrument (3);
step II: the SCADA control system (6) or the remote intelligent metering systemThe system (8) performs the following calculation according to the values and obtains the following formula: due to the density of the pulp
Pulp and its production processContinuously changing with different working conditions (such as beating water, beating and mixing pulp water), thereby
Pulp and its production processIs time of day
Function of (2)
Pulp and its production process(t); the number S of piston strokes of the positive displacement piston diaphragm pump (2) is continuously increased, and S is continuously changed to replace the increasing of the time t, so that the positive displacement piston diaphragm pump (2) has the advantages of simple structure, low cost and high efficiency
Pulp and its production process(t) can be rewritten as
Pulp and its production process(S) ；
Through dSOne stroke (i.e. d)tTime), the volume of slurry pumped is:
Wherein: v0-the desired pumping volume for a single stroke of the piston; η -stroke volume empirical coefficient (efficiency of piston pumping); vPulp and its production process-pulp volume;
then in s strokes (i.e. t time), the total volume and the total mass of the slurry pumped are respectively:
equation 2
VPulp and its production processThe stroke number s required by the calculation comes from the collection of the PLC control system (5) on the stroke number of the main pump 2;
and MPulp and its production processCalculating the required real-time pulp density
Pulp and its production process(S) is not directly measured, and the real-time pulp mass concentration acquired from the concentration meter 3 by the PLC control system 5 is required
Or
To calculate; namely, it is
Pulp and its production process(S)= f(
) Or
Pulp and its production process(t) = f()；
Based on the parameters of formulas 1, 2 and 3, the dry ore quality in the whole pipeline can be deduced by combining the real-time data collected by the PLC control system (5):
Wherein:-the number of pipe sections;
-a homogeneous fluid segment number;
-a pipe section
To middle
Length of each (dynamically calculated according to the running history of the pipeline)
）；
-a conduit cross-sectional area;
-a pipe section
To middle
Density of individual homogeneous fluid segments;
-a pipe section
To middleThe solids mass concentration of the individual homogeneous fluid segments;-a pipe section
The number of middle fluid stages;
production water quality in the whole pipeline (without water in the pulp):
Wherein:
-a switching value for controlling whether the water in the slurry is counted in the total mass of water in the pipe, whereby the total amount of water in the slurry is counted out of the pipe,
the value taking method comprises the following steps: when the pipe section
To middle
When each homogeneous fluid section is water, the value is 1; when the slurry is slurry, the value is 0;
wherein,M pulp and its production process=M Mine in pipe+M Water in the pipe。
Further, it is characterized byThe SCADA control system (6) or the remote intelligent metering system (8) calculatesM Mine in pipeThe mass of the iron ore concentrate calculated by the belt weigher (4) is compared, and when the two values are the same or have a difference within a safety value, the pipeline transportation safety of the iron ore concentrate is proved; when the difference value of the two values is larger than the safety value, a certain amount of iron ore concentrate is proved to be remained in the pipeline, and fault removal is needed.
The intelligent measuring system and the measuring method for the ore pulp pipeline transportation quantity have the following beneficial effects:
(1) according to the invention, the pulp concentration and pulp volume data are acquired through the positive displacement piston diaphragm pump, the concentration meter and the PLC control system, and the iron ore concentrate pulp volume and the iron ore concentrate pulp quality in a section of pulp pipeline, the iron ore concentrate quality in the whole pipeline and the quality of the production water in the whole pipeline are obtained according to the calculation formula, so that various parameters in the whole pipeline transportation are precisely monitored.
(2) The invention can also compare the calculated dry ore mass in the whole pipeline with the iron ore concentrate calculated by the belt weigher to determine whether the iron ore concentrate in the pipeline is completely transported out or not, so as to determine whether the whole pipeline transportation is safe and stable or not.
(3) The invention also establishes a remote intelligent metering system through a network, and the system not only can receive the calculation result sent by the working site SCADA control system, but also can directly read related data from the PLC control system and carry out calculation so as to ensure the accuracy and precision of the calculated value and avoid distortion or error.
(4) The invention can accurately measure the instantaneous flow of the conveyed substances in the pipeline no matter whether water or ore pulp runs in the pipeline.
Drawings
FIG. 1: the invention relates to an intelligent measuring system and a measuring method for the ore pulp pipeline transportation volume, which are connected with a graph;
FIG. 2: the invention is a display interface diagram of the intelligent measuring system of the ore pulp pipeline transportation amount.
Description of reference numerals:
1-a pulp conduit; 2-positive displacement piston diaphragm pump; 3-concentration meter; 4, a belt weigher; 5-a PLC control system; 6-SCADA control system; 7, managing and controlling an integrated system; 8, a remote intelligent metering system; and 9, displaying an interface of the pipeline slurry conveying and metering system.
Detailed Description
The invention is further illustrated below with reference to fig. 1 and 2:
as shown in fig. 1, an intelligent measuring system for pulp pipeline transportation capacity includes one or more pulp pipelines 1, one or more positive displacement piston diaphragm pumps 2, one or more concentration meters 3, a PLC control system 5, and an SCADA control system 6.
The pulp conduit 1 is used for transporting iron concentrate pulp.
The positive displacement piston diaphragm pump 2 is used to pressurize the pulp in the pulp conduit 1 and its fixed pump chamber is used to measure the volume of iron concentrate pulp pumped in a certain time or a certain stroke.
This concentration meter 3 its iron concentrate ore pulp concentration that is arranged in measuring ore pulp pipeline 1, this concentration meter 3 is ultrasonic wave concentration meter.
The PLC control system 5 is used for controlling the positive displacement piston diaphragm pump 2 and the concentration meter 3 and collecting the volume of the iron ore concentrate pulp and the concentration value of the iron ore concentrate pulp measured by the positive displacement piston diaphragm pump 2 and the concentration meter 3.
The SCADA control system 6 is used for receiving the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value collected by the PLC control system 5, and calculating the iron ore concentrate slurry volume and the iron ore concentrate slurry quality in the first section of the slurry pipeline 1, the iron ore concentrate quality in the whole pipeline and the quality of the production water in the whole pipeline.
According to the components and the functions thereof, the volume of the iron ore concentrate pulp, the quality of the iron ore concentrate in the whole pipeline and the quality of the water produced in the whole pipeline can be calculated at the pipeline conveying site.
In addition, the system also comprises a belt scale 4, wherein the belt scale 4 is used for measuring the mass of the dehydrated iron ore concentrate; the belt weigher 4 sends the quality data of the anhydrous iron ore concentrate to the SCADA control system 6 through the PLC control system 5, and the SCADA control system 6 compares the measured value of the belt weigher 4 with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline.
Therefore, the invention can also compare the calculated dry ore mass in the whole pipeline with the iron ore concentrate calculated by the belt weigher to determine whether the iron ore concentrate in the pipeline is completely transported out, so as to determine whether the whole pipeline transportation is safe and stable.
As shown in a dotted line box of fig. 1, the present invention further includes a management and control integrated system 7 and a remote intelligent metering system 8, wherein the management and control integrated system 7 performs remote monitoring and management with the SCADA control system 6 through a network.
Furthermore, the system also comprises a remote intelligent metering system 8, wherein the remote intelligent metering system 8 is connected with the PLC control system 5 through a network, directly collects the iron ore concentrate pulp volume and the iron ore concentrate pulp concentration value acquired by the PLC control system 5, and calculates the iron ore concentrate pulp volume, the iron ore concentrate pulp quality, the iron ore concentrate quality in the whole pipeline and the quality of the water produced in the whole pipeline. The invention also establishes a remote intelligent metering system 8 through a network, and the remote intelligent metering system 8 not only can receive the calculation result sent by the working site SCADA control system, but also can directly read related data from the PLC control system 5 and carry out calculation so as to ensure the accuracy and precision of the calculated value and avoid distortion or error.
The belt weigher 4 sends the mass data of the anhydrous iron ore concentrate to the remote intelligent metering system 8 through the PLC control system 5, and the remote intelligent metering system 8 compares the measured value of the belt weigher 4 with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline. Thus, it is also possible to clearly know at the remote control end whether there is iron ore concentrate that has not been completely carried out in the pipe transportation.
The remote intelligent metering system 8 also comprises a pipeline slurry conveying metering system display interface 9 which can be directly managed by operators and managers.
The working principle of the intelligent measuring system for the ore pulp pipeline transportation amount is as follows:
step I: the PLC control system 5 collects the volume of the iron ore concentrate pulp and the concentration value of the iron ore concentrate pulp measured by the positive displacement piston diaphragm pump 2 and the concentration meter 3;
step II: the SCADA control system 6 or the remote intelligent metering system 8 performs the following calculation according to the values and obtains the following formula: due to the density of the pulp
Pulp and its production processContinuously changing with different working conditions (such as beating water, beating and mixing pulp water), thereby
Pulp and its production processIs time of day
Function of (2) Pulp and its production process(t); the number S of piston strokes of the positive displacement piston diaphragm pump 2 is continuously increased, S is continuously changed instead of increasing the time t, so
Pulp and its production process(t) can be rewritten as
Pulp and its production process(S) ；
Through dSOne stroke (i.e. d)tTime), the volume of slurry pumped is:
Wherein: v0-the desired pumping volume for a single stroke of the piston; η -stroke volume empirical coefficient (efficiency of piston pumping); vPulp and its production process-pulp volume;
then in s strokes (i.e. t time), the total volume and the total mass of the slurry pumped are respectively:
equation 2
VPulp and its production processThe stroke number s required by the calculation comes from the collection of the stroke number of the main pump 2 by the PLC control system 5;
and MPulp and its production processCalculating the required real-time pulp density
Pulp and its production process(S) is not directly measured, and the real-time pulp mass concentration acquired from the concentration meter 3 by the PLC control system 5 is requiredOr
To calculate; namely, it is Pulp and its production process(S)= f() Or
Pulp and its production process(t) = f(
)；
Based on the parameters of formulas 1, 2 and 3, the dry ore quality in the whole pipeline can be deduced by combining the real-time data collected by the PLC control system 5:
Wherein:
-the number of pipe sections;
-a homogeneous fluid segment number;-a pipe section
To middle
Length of each (dynamically calculated according to the running history of the pipeline)
）；
-a conduit cross-sectional area;
-a pipe section
To middle
Density of individual homogeneous fluid segments;
-a pipe section
To middle
The solids mass concentration of the individual homogeneous fluid segments;-a pipe section
The number of middle fluid stages.
It should be noted that the iron ore concentrate pipeline transportation is generally composed of connecting pipelines between a plurality of base stations, so that during transportation, in order to ensure the pressure of the whole pipeline transportation, different fluids can be conveyed in different pipe sections, namely, some pipe sections are iron ore concentrate pulp, and some pipe sections are only used for conveying clean water.
Production water quality in the whole pipeline (without water in the pulp):
equation 5
Wherein:
-a switching value for controlling whether the water in the slurry is counted in the total mass of water in the pipe, whereby the total amount of water in the slurry is counted out of the pipe,
the value taking method comprises the following steps: when the pipe section
To middle
When each homogeneous fluid section is water, the value is 1; when the slurry is slurry, the value is 0;
wherein,M pulp and its production process=M Mine in pipe+M Water in the pipe。
Finally, the SCADA control system 6 or the remote intelligent metering system 8 calculatesM Mine in pipeComparing the calculated mass of the iron ore concentrate with the mass of the belt scale 4, and when the two values are the same or have a difference within a safety value, the pipeline transportation safety of the iron ore concentrate is proved; when the difference value of the two values is larger than the safety value, a certain amount of iron ore concentrate is proved to be remained in the pipeline, and fault removal is needed.
As shown in fig. 2, the interface shown in fig. 2 is a display interface of the intelligent metering system for solid transportation according to the present invention. Which shows various parameters of various substances in the pipeline.
The invention is described above with reference to the accompanying drawings, it is obvious that the implementation of the invention is not limited in the above manner, and it is within the scope of the invention to adopt various modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (9)
1. The utility model provides an intelligence measurement system of ore pulp pipeline fortune volume which characterized in that: comprises that
One or more slurry pipes (1), wherein the slurry pipes (1) are used for conveying iron ore concentrate slurry;
one or more positive displacement piston diaphragm pumps (2), wherein the positive displacement piston diaphragm pumps (2) are used for pressurizing ore pulp in the ore pulp pipeline (1), and the fixed pump cavity of the positive displacement piston diaphragm pumps is used for measuring the volume of iron ore concentrate pulp pumped by the iron ore concentrate pulp in a certain time or a certain stroke;
one or more concentration meters (3) for metering the iron concentrate pulp concentration in the pulp conduit (1);
a PLC control system (5) for controlling the positive displacement piston diaphragm pump (2) and the concentration meter (3) and collecting iron concentrate slurry volume and iron concentrate slurry concentration values measured by the positive displacement piston diaphragm pump (2) and the concentration meter (3);
the SCADA control system (6) is used for receiving the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value collected by the PLC control system (5), and calculating the iron ore concentrate slurry volume and the iron ore concentrate slurry mass in a section of the slurry pipeline (1), the iron ore concentrate mass in the whole pipeline and the mass of the production water in the whole pipeline;
the PLC control system (5) collects the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value measured by the positive displacement piston diaphragm pump (2) and the concentration measuring instrument (3);
the SCADA control system (6) or the remote intelligent metering system (8) performs the following calculation according to the values and obtains the following formula:
through dSOne stroke, i.e. dtTime, the volume of slurry pumped is:
formula 1;
wherein: v0-the desired pumping volume for a single stroke of the piston; η -stroke volume empirical coefficient, efficiency of piston pumping; vPulp and its production process-pulp volume;
then in s strokes, i.e. t time, the total volume and total mass of the slurry pumped are respectively:
Vpulp and its production processThe stroke number s required by the calculation is acquired from the PLC control system (5) to the stroke number of the positive displacement piston diaphragm pump (2);
and MPulp and its production processCalculating the required real-time pulp density
Pulp and its production process(S) is not directly measured, and the real-time pulp mass concentration acquired from the concentration meter (3) by the PLC control system (5) is required
OrTo calculate; namely, it is
Pulp and its production process(S)= f(
) Or
Pulp and its production process(t) = f(
)；
Based on the parameters of formulas 1, 2 and 3, the dry ore quality in the whole pipeline can be deduced by combining the real-time data collected by the PLC control system (5):
wherein:
-the number of pipe sections;-a homogeneous fluid segment number;
-a pipe sectionTo middleThe length of each of the pipes is dynamically calculated according to the operation history of the pipe
；
-a conduit cross-sectional area;
-a pipe section
To middle
Density of individual homogeneous fluid segments;
-a pipe section
To middleThe solids mass concentration of the individual homogeneous fluid segments;
-a pipe section
The number of middle fluid stages;
the production water quality in the whole pipeline does not contain water in the ore pulp:
wherein:-a switching value for controlling whether the water in the slurry is counted in the total mass of water in the pipe, whereby the total amount of water in the slurry is counted out of the pipe,
the value taking method comprises the following steps: when the pipe section
To middle
When each homogeneous fluid section is water, the value is 1; when the slurry is slurry, the value is 0;
wherein,M pulp and its production process=M Mine in pipe+M Water in the pipe。
2. The intelligent pulp pipe capacity metering system of claim 1, characterized in that: the system also comprises a belt scale (4) which is used for metering the dehydrated iron ore concentrate; the belt weigher (4) sends the quality data of the anhydrous iron ore concentrate to the SCADA control system (6) through the PLC control system (5), and the SCADA control system (6) compares the measured value of the belt weigher (4) with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline.
3. The intelligent metering system for the pulp pipeline transportation amount according to claim 1 or 2, characterized in that: the system is characterized by further comprising a management and control integrated system (7), wherein the management and control integrated system (7) is in remote monitoring and management with the SCADA control system (6) through a network.
4. The intelligent pulp pipe capacity metering system of claim 2, characterized in that: still include long-range intelligent measurement system (8), long-range intelligent measurement system (8) pass through the network with PLC control system (5) are connected, and direct collection the iron ore concentrate ore pulp volume and the iron ore concentrate ore pulp concentration numerical value that PLC control system (5) gathered to calculate the quality of the interior iron ore concentrate quality of iron ore concentrate ore pulp volume, iron ore concentrate ore pulp quality, whole pipeline and the interior production water of whole pipeline.
5. The intelligent pulp pipe capacity metering system of claim 4, characterized in that: the belt weigher (4) sends the quality data of the anhydrous iron ore concentrate to the remote intelligent metering system (8) through the PLC control system (5), and the remote intelligent metering system (8) compares the measured value of the belt weigher (4) with the calculated value of the belt weigher to determine whether the iron ore concentrate which is not output exists in the pipeline.
6. The intelligent pulp pipe capacity metering system of claim 1, characterized in that: the remote intelligent metering system (8) also comprises a pipeline slurry conveying metering system display interface (9).
7. The intelligent pulp pipe capacity metering system of claim 1, characterized in that: the concentration meter (3) is an ultrasonic concentration meter.
8. A method for intelligent metering of pulp piping capacity according to claims 1 to 7, comprising the steps of:
step I: the PLC control system (5) collects the iron ore concentrate slurry volume and the iron ore concentrate slurry concentration value measured by the positive displacement piston diaphragm pump (2) and the concentration measuring instrument (3);
step II: the SCADA control system (6) or the remote intelligent metering system (8) performs the following calculation according to the values and obtains the following formula:
through dSOne stroke, i.e. dtTime, the volume of slurry pumped is:
formula 1;
wherein: v0-the desired pumping volume for a single stroke of the piston; η -stroke volume empirical coefficient, efficiency of piston pumping; vPulp and its production process-pulp volume;
then in s strokes, i.e. t time, the total volume and total mass of the slurry pumped are respectively:
Vpulp and its production processThe number s of strokes required for calculation is obtained from the PLC control system (5) for the positive displacement piston diaphragm pump(2) Acquiring stroke number;
and MPulp and its production processCalculating the required real-time pulp density Pulp and its production process(S) is not directly measured, and the real-time pulp mass concentration acquired from the concentration meter (3) by the PLC control system (5) is requiredOr
To calculate; namely, it is
Pulp and its production process(S)= f(
) Or
Pulp and its production process(t) = f(
)；
Based on the parameters of formulas 1, 2 and 3, the dry ore quality in the whole pipeline can be deduced by combining the real-time data collected by the PLC control system (5):
wherein:-the number of pipe sections;
-a homogeneous fluid segment number;
-a pipe section
To middle
The length of each of the pipes is dynamically calculated according to the operation history of the pipe；
-a conduit cross-sectional area;
-a pipe section
To middle
Density of individual homogeneous fluid segments;-a pipe section
To middle
The solids mass concentration of the individual homogeneous fluid segments;
-a pipe section
The number of middle fluid stages;
the production water quality in the whole pipeline does not contain water in the ore pulp:
wherein:
-a switching value for controlling whether the water in the slurry is counted in the total mass of water in the pipe, whereby the total amount of water in the slurry is counted out of the pipe,
the value taking method comprises the following steps: when the pipe section
To middle
When each homogeneous fluid section is water, the value is 1; when the slurry is slurry, the value is 0;
wherein,M pulp and its production process=M Mine in pipe+M Water in the pipe。
9. The intelligent metering method of the pulp pipeline transportation volume according to claim 8, characterized in that: the SCADA control system (6) or the remote intelligent metering system (8) calculatesM Mine in pipeThe mass of the iron ore concentrate calculated by the belt weigher (4) is compared, and when the two values are the same or have a difference within a safety value, the pipeline transportation safety of the iron ore concentrate is proved; when the difference value of the two values is larger than the safety value, a certain amount of iron ore concentrate is proved to be remained in the pipeline, and fault removal is needed.
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|---|---|---|---|
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|---|---|---|---|
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| CN102928559B (en) * | 2012-10-30 | 2014-12-31 | 云南大红山管道有限公司 | Monitoring method of slurry pipe conveying medium characteristics |
| CN106525167A (en) * | 2016-10-25 | 2017-03-22 | 洛阳栾川钼业集团股份有限公司 | Rough scheelite concentrate measurement method based on electromagnetic wave flowmeter and ultrasonic concentration meter |
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| CN109945940A (en) * | 2019-03-29 | 2019-06-28 | 包头钢铁（集团）有限责任公司 | A kind of pulp conveying metering device |
| CN110895867A (en) * | 2019-11-13 | 2020-03-20 | 鞍钢集团矿业有限公司 | Tailing conveying pipeline dynamic alarm method based on pressure signals |
| CN117367464B (en) * | 2023-10-10 | 2024-07-19 | 中煤科工集团武汉设计研究院有限公司 | Automatic pricing device and method for multi-source iron concentrate pulp collection system |
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| AU2006238583A1 (en) * | 2005-04-20 | 2006-10-26 | Csir | Control of slurry flow |
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| CN1395055A (en) * | 2001-07-06 | 2003-02-05 | 肖诗忠 | Method for measuring concentration of pipeline slurry body and multi-phase flow solid content and its equipment |
| CN1940490A (en) * | 2005-10-01 | 2007-04-04 | 白建忠 | Continuous on-line measuring equipment for controlling parameter by iron-mine pulp process |
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