CN117270591A - Extraction production line monitoring method and system - Google Patents
Extraction production line monitoring method and system Download PDFInfo
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- CN117270591A CN117270591A CN202311232004.8A CN202311232004A CN117270591A CN 117270591 A CN117270591 A CN 117270591A CN 202311232004 A CN202311232004 A CN 202311232004A CN 117270591 A CN117270591 A CN 117270591A
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- extraction
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- balance point
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- 238000000605 extraction Methods 0.000 title claims abstract description 182
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 238000002835 absorbance Methods 0.000 claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000013507 mapping Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000012074 organic phase Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 6
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 6
- 229910052684 Cerium Inorganic materials 0.000 description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/139—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring a value related to the quantity of the individual components and sensing at least one property of the mixture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a method and a system for monitoring an extraction production line. The extraction production line comprises a plurality of extraction tanks in cascade connection, and the extraction production line monitoring method comprises the following steps: the absorbance of the liquid in each extraction tank to the light with the same set wavelength is obtained in real time; mapping the obtained absorbance information into the concentration of the set element in the liquid in each extraction tank, and determining the position of the balance point according to the distribution of the concentration of the set element in the liquid in each extraction tank; and generating prompt information for regulating the process or regulating the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position. The method can realize real-time monitoring and control of the extraction production line, and the monitoring effect is stable and reliable.
Description
Technical Field
The invention relates to the technical field of hydrometallurgy, in particular to a method and a system for monitoring an extraction production line.
Background
Hydrometallurgy has long been difficult to achieve automatic control, and the key problem is that online detection cannot be achieved, feedback signals are not available, and automatic control is not from talk. The existing detection method is to analyze the components of the extraction solution by using an X-RAY detection method, but the method has high cost, cannot be used in a large amount, and cannot acquire the changes of all the components in the extraction tank in real time.
CN1076135a proposes an automatic control method of the fractionation extraction flow, wherein the distribution of the components of the liquid at the monitoring point position needs to be controlled.
Disclosure of Invention
The invention provides a method and a system for monitoring an extraction production line.
The invention provides the following technical scheme: an extraction line monitoring method, the extraction line comprising a plurality of extraction tanks in cascade, the extraction line monitoring method comprising:
the absorbance of the liquid in each extraction tank to the light with the same set wavelength is obtained in real time;
mapping the obtained absorbance information into the concentration of the set element in the liquid in each extraction tank, and determining the position of the balance point according to the distribution of the concentration of the set element in the liquid in each extraction tank;
and generating prompt information for regulating the process or regulating the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position.
Optionally, adjusting the flow rate of the liquid flowing into the extraction tank according to the relationship between the balance point position and the preset position includes:
at least one of the injection amount of the organic phase and the injection amount of the washing liquid in the at least one stage extraction tank is adjusted.
Optionally, the method further comprises:
and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
Optionally, the balance point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position of the 3 continuous extraction tanks.
The invention provides the following technical scheme: an extraction line monitoring system, the extraction line comprising a plurality of extraction tanks in cascade, the extraction line monitoring system comprising: the system comprises a plurality of sensors, a workstation and a control system, wherein the sensors are arranged in one-to-one correspondence with the plurality of extraction tanks, the workstation is in communication connection with the plurality of sensors, and the control system is in communication connection with the workstation;
the sensor is used for detecting the absorbance of the liquid in the corresponding extraction tank to the light with the same set wavelength in real time and sending absorbance data to the workstation in real time;
the workstation is used for mapping the received absorbance data into the concentration of the set element in the liquid in each extraction tank, determining the position of an equilibrium point according to the distribution of the concentration of the set element in the liquid in each extraction tank, and sending the distribution of the concentration of the set element in the liquid in each extraction tank and the current equilibrium point to the control center;
the control center is used for generating prompt information for adjusting the process or adjusting the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position.
Optionally, the control center is specifically configured to:
and adjusting at least one of the injection quantity of the organic phase and the injection quantity of the washing liquid of the at least one stage of extraction tank according to the relation between the balance point position and the preset position.
Optionally, the control center is further configured to:
and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
Optionally, the balance point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position of the 3 continuous extraction tanks.
Optionally, the sensor is a spectrophotometer, and a detection wavelength of the spectrophotometer is set by the workstation.
Optionally, the device further comprises a first pipeline for communicating the inlet of the spectrophotometer with the corresponding extraction tank, a second pipeline for communicating the outlet of the spectrophotometer with the corresponding extraction tank, and a power device for controlling the liquid in the extraction tank to flow into the corresponding spectrophotometer and flow back to the extraction tank from the spectrophotometer.
The invention analyzes the concentration distribution of the same element in each extraction tank in real time, on one hand, the data acquisition can be realized easily, and on the other hand, the monitoring result is accurate and efficient.
Drawings
FIG. 1 is a schematic diagram of an extraction line monitoring system and a monitored extraction line according to the present invention.
FIG. 2 is a flow chart of the method for monitoring an extraction line according to the present invention.
Detailed Description
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto.
FIG. 1 is a schematic diagram of an extraction line monitoring system and a monitored extraction line according to the present invention. FIG. 2 is a flow chart of the method for monitoring an extraction line according to the present invention.
Referring to fig. 2 in combination with fig. 1, an embodiment of the present invention provides an extraction line monitoring method, where an extraction line includes a plurality of extraction tanks (e.g., extraction tank 1, extraction tank 2 to extraction tank n in fig. 1) in cascade, and the extraction line monitoring method includes:
step 101, acquiring the absorbance of liquid in each extraction tank to light with the same set wavelength in real time;
102, mapping the obtained absorbance information into the concentration of the set element in the liquid in each extraction tank, and determining the position of an equilibrium point according to the distribution of the concentration of the set element in the liquid in each extraction tank;
step 103, generating prompt information for adjusting the process or adjusting the flow of the liquid flowing into the extraction tank according to the relationship between the balance point position and the preset position under the condition that the balance point position is not the preset position.
In the case of stable production process of the extraction production line, the position of the balance point is also stable. When the position of the balance point changes, the fluctuation of the production process of the extraction production line is indicated, and the extraction production line is required to be interfered by the outside in time.
The method realizes the real-time control of the extraction production line process by monitoring the absorbance of the liquid in each extraction tank to the light with the same set wavelength in real time. On one hand, the data acquisition can be realized easily, and on the other hand, the monitoring result is accurate and efficient.
Optionally, adjusting the flow rate of the liquid flowing into the extraction tank according to the relationship between the equilibrium point position and the preset position includes:
at least one of the injection amount of the organic phase and the injection amount of the washing liquid in the at least one stage extraction tank is adjusted.
Taking an extraction process for separating cerium from praseodymium as an example, the concentration of praseodymium in each extraction tank is monitored in real time. When the balance point moves to the first-stage extraction tank, the injection amount of the organic phase needs to be regulated up or the injection amount of the washing liquid needs to be regulated down; when the equilibrium point moves to the last stage extraction tank, it is necessary to either increase the injection amount of the wash liquid or decrease the injection amount of the organic phase.
The organic phase and the washing liquid are adjusted differently in different production processes and are related to the selection of the kind of the detected element.
Optionally, the method further comprises: and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
The concentration of the element being monitored is steep near the equilibrium point. Outside the equilibrium point and the extraction cells directly connected to the equilibrium point, the concentration of the element to be monitored varies only to a limited extent between adjacent extraction cells. If the concentration difference of the monitored elements in the adjacent extraction tanks is too large, the production or detection is abnormal, and the maintenance is needed. For example, it may be that a sensor for measuring absorbance of light malfunctions.
The two extraction tanks are connected, which means that no other extraction tank is connected between the two extraction tanks.
Optionally, the balance point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position in the 3 continuous extraction tanks.
Taking the extraction process of separating cerium from praseodymium as an example, the extraction process is monitored to enable the cerium element to be in cascade connection with the extraction tanks in the order from small to large, and the extraction tank with the concentration of the cerium element being suddenly reduced is taken as the balance point.
Taking the extraction process of separating cerium from praseodymium as an example, the method is monitored to enable the praseodymium element to be in cascade connection with the extraction tank in the order from small to large, and the extraction tank with the concentration of the praseodymium element being increased suddenly is taken as a balance point.
Based on the same inventive concept, referring to fig. 1, an extraction line monitoring system according to an embodiment of the present invention includes a plurality of extraction tanks cascaded, the extraction line monitoring system including: the system comprises a plurality of sensors, a workstation and a control system, wherein the plurality of sensors are arranged in one-to-one correspondence with the plurality of extraction tanks, the workstation is in communication connection with the plurality of sensors, and the control system is in communication connection with the workstation;
the sensor is used for detecting the absorbance of the liquid in the corresponding extraction tank to the light with the same set wavelength in real time and sending absorbance data to the workstation in real time;
the workstation is used for mapping the received absorbance data into the concentration of the set element in the liquid in each extraction tank, determining the position of the balance point according to the distribution of the concentration of the set element in the liquid in each extraction tank, and sending the distribution of the concentration of the set element in the liquid in each extraction tank and the current balance point to the control center;
the control center is used for generating prompt information for adjusting the process or adjusting the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position.
The control center can send a prompt message for adjusting the process to an operator, so that the operator can manually adjust the process parameters according to the position of the balance point. Or the control center runs a specific program and automatically generates an instruction for adjusting the process parameters.
Optionally, the control center is specifically configured to:
and adjusting at least one of the injection amount of the organic phase and the injection amount of the washing liquid of the at least one stage of extraction tank according to the relation between the balance point position and the preset position.
Optionally, the control center is further configured to:
and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
Optionally, the balance point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position in the 3 continuous extraction tanks.
Optionally, the sensor is a spectrophotometer, and the detection wavelength of the spectrophotometer is set by the workstation.
Optionally, the system further comprises a first pipeline L1 for communicating the inlet of the spectrophotometer with the corresponding extraction tank, a second pipeline L2 for communicating the outlet of the spectrophotometer with the corresponding extraction tank, and a power device (not shown) for controlling the liquid in the extraction tank to flow into the corresponding spectrophotometer and flow back to the extraction tank from the spectrophotometer. The power device is, for example, a pump.
The liquid in the extraction tank continuously flows through the spectrophotometer, so that the spectrophotometer can monitor the absorbance of the liquid in the extraction tank to the light with the set wavelength in real time.
Only the existing production line is simply modified, and the real-time monitoring and control of the extraction production line can be realized.
The workstation is, for example, a computer or Programmable Logic Controller (PLC). The workstation is communicatively coupled to the sensor, for example, via a serial communication interface, a field industrial bus port, or a network interface. The workstation may, for example, set the detection wavelength of the sensor.
The extraction tank may specifically be a box-type extraction tank or a centrifugal extraction tank.
The embodiments of the present invention are described in a progressive manner, and the same and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described in the differences from the other embodiments.
The scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the invention. It is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. An extraction line monitoring method, the extraction line comprising a plurality of extraction tanks in cascade, the extraction line monitoring method comprising:
the absorbance of the liquid in each extraction tank to the light with the same set wavelength is obtained in real time;
mapping the obtained absorbance information into the concentration of the set element in the liquid in each extraction tank, and determining the position of the balance point according to the distribution of the concentration of the set element in the liquid in each extraction tank;
and generating prompt information for regulating the process or regulating the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position.
2. The method according to claim 1, wherein adjusting the flow rate of the liquid flowing into the extraction tank according to the relationship between the equilibrium point position and the preset position comprises:
at least one of the injection amount of the organic phase and the injection amount of the washing liquid in the at least one stage extraction tank is adjusted.
3. The method as recited in claim 1, further comprising:
and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
4. The method of claim 1, wherein the equilibrium point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position in the 3 continuous extraction tanks.
5. An extraction line monitoring system, the extraction line comprising a plurality of extraction tanks in cascade, the extraction line monitoring system comprising: the system comprises a plurality of sensors, a workstation and a control system, wherein the sensors are arranged in one-to-one correspondence with the plurality of extraction tanks, the workstation is in communication connection with the plurality of sensors, and the control system is in communication connection with the workstation;
the sensor is used for detecting the absorbance of the liquid in the corresponding extraction tank to the light with the same set wavelength in real time and sending absorbance data to the workstation in real time;
the workstation is used for mapping the received absorbance data into the concentration of the set element in the liquid in each extraction tank, determining the position of an equilibrium point according to the distribution of the concentration of the set element in the liquid in each extraction tank, and sending the distribution of the concentration of the set element in the liquid in each extraction tank and the current equilibrium point to the control center;
the control center is used for generating prompt information for adjusting the process or adjusting the flow of the liquid flowing into the extraction tank according to the relation between the balance point position and the preset position under the condition that the balance point position is not the preset position.
6. The system according to claim 5, wherein the control center is specifically configured to:
and adjusting at least one of the injection quantity of the organic phase and the injection quantity of the washing liquid of the at least one stage of extraction tank according to the relation between the balance point position and the preset position.
7. The system of claim 5, wherein the control center is further configured to:
and generating information for prompting overhaul when the concentration difference between any one of the extraction tanks and the set element in the liquid in any one of the adjacent extraction tanks exceeds a preset range for the balance point and the extraction tanks outside the extraction tank directly connected with the balance point.
8. The system of claim 5, wherein the balance point is determined as follows:
and selecting 3 continuous extraction tanks, wherein the concentration difference of the set elements in the liquid in any adjacent 2 extraction tanks is larger than a set value, the concentration of the set elements in the liquid in the 3 continuous extraction tanks accords with a preset continuous increasing rule or a preset continuous decreasing rule, and determining the balance point as the extraction tank positioned in the middle position of the 3 continuous extraction tanks.
9. The system of claim 5, wherein the sensor is a spectrophotometer whose detection wavelength is set by the workstation.
10. The system of claim 9, further comprising a first conduit communicating the inlet of the spectrophotometer with a corresponding extraction tank, a second conduit communicating the outlet of the spectrophotometer with a corresponding extraction tank, and a power device controlling the flow of liquid in the extraction tank into the corresponding spectrophotometer and back from the spectrophotometer to the extraction tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311232004.8A CN117270591A (en) | 2023-09-22 | 2023-09-22 | Extraction production line monitoring method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311232004.8A CN117270591A (en) | 2023-09-22 | 2023-09-22 | Extraction production line monitoring method and system |
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| Publication Number | Publication Date |
|---|---|
| CN117270591A true CN117270591A (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311232004.8A Pending CN117270591A (en) | 2023-09-22 | 2023-09-22 | Extraction production line monitoring method and system |
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| Country | Link |
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| CN (1) | CN117270591A (en) |
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- 2023-09-22 CN CN202311232004.8A patent/CN117270591A/en active Pending
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