CN1670646A - Rare earth cascade extraction separation intelligence control system and method - Google Patents
Rare earth cascade extraction separation intelligence control system and method Download PDFInfo
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Abstract
This invention discloses a rare earth series extraction intelligent control system, which comprises operation station and spot executive system and is characterized by the following: fixing model station, together with operation, connected to the OPC communication module, wherein, the above two and the PLC controller are connected to the spot executive system through industry Ethernet and Profibus-DP. The invention also provides one method to execute the control system, which is characterized by the following: the model station feedbacks the difference value between the optimization parameter by experiences with spot parameters as the basis of the operation station. The invention also discloses one multi-media monitoring system to real time display the spot situations in workshops.
Description
Technical field
The extraction that the invention belongs to rare earth metal is particularly by using the technical field of solution of organic compound to rare earth extraction. specifically, the invention provides the intelligence control system that a kind of rare-earth cascade extraction separates.
Background technology
Rare earth metal family comprises 17 kinds of elements, and its chemical property is very similar, always exists with the form of mineral intergrowth again at occurring in nature, so its separation and purifying is very difficult.Since last century the seventies, invented the technology that the method for taking cascade extraction is come separating rare-earth metal, promptly utilized the fine difference that exists between the rare-earth metals element on the performance, extracted over and over again, to obtain pure product.Rare-earth cascade extraction detachment process technological process as shown in Figure 1, whole piece extraction production line is composed in series by the multitple extraction groove, is followed successively by the stripping section that the extraction section that is made of n level extraction tank, washing section that m level extraction tank constitutes and L level extraction tank constitute from left to right and forms.T is a storage tank among Fig. 1, is used to store organic, ammoniacal liquor, feed liquid, washes acid, sour regurgitation and exported product; M is a stirring motor, is placed in the mixing chamber, by beating action water is fully contacted with organic phase.
Extraction tank is made up of mixing chamber and clarifying chamber, in the rare earth extraction detachment process, by dynamic action, make organic phase and water at mixing chamber, clarifying chamber and stream, and integral body produce reverse flow to stirring motor in extraction cell body special structure design and the extraction process mixing chamber.Be that organic phase totally is mobile from left to right, water totally is mobile from right to left, as shown in Figure 2.Solution in the clarifying chamber is divided into two-layer according to organic extractant and the immiscible principle of water: the upper strata is an organic phase, and lower floor is a water.According to the different characteristics of rare earth component percentage extraction, rare earth element is divided into easy collection component A and difficult collection B component.The operator is according to the cascade extraction principle, according to certain balanced proportions relation, organic, ammoniacal liquor, the feed liquid among the control storage tank T, washes liquid such as acid, sour regurgitation and injects the extraction production line continuously according to certain flow.The effect of extraction section is the most A in the aqueous phase liquid and small part B to be come together obtain load organic phases into organic phase; The effect of washing section is by cleansing solution and organic phase MULTI CONTACT, and the overwhelming majority of B in the load organic phases is washed water.Because organic phase is different with water proportion and immiscible, the effect by means of stirring motor M in extraction tank special structure design and the multistage mixing chamber makes organic phase fully contact step by step with water, enters clarifying chamber's clarification after the overflow and separates.(water from right to left in the reverse flow of process organic phase and water, organic phase is from left to right), and extraction section and washing section exchange and purifying at different levels, make the difficult collection of aqueous phase B component purity improve step by step, reach the technic index requirement at last, export by extraction section water products export.And the component A that easily comes together in the rare earth is taken away by organic phase, separates from organic phase through the cleansing solution effect at stripping section, is exported by washing section organic phase products export.
For guaranteeing product purity, need in the production run product design and controlled stage rare earth concentration in the outlet of extraction production line water are chemically examined, and extraction choose on the production line highly sensitive, response soon, level point that can the reaction, extraction procedural information is as check point, carries out the chemical examination of component purity.The operator adjusts flow setting value according to concentration laboratory values and component purity laboratory values, to guarantee the product purity and the feed liquid treatment capacity of productive target defined.Problem on the more control, the new difficult point that also can occur controlling.
The development of rare-earth cascade extraction isolation technics on the one hand because production scale is very big, requires to realize that the robotization chain of command of production run is very big; Because its parameter is more, control procedure is very complicated on the other hand, so the control difficulty is very big.These integrate the very big obstacle that has formed China's rare-earth industry development.For this reason, Ministry of Science and Technology's approval project verification is tackled key problems to rare earth extraction detachment process on-line analysis and closed-loop control industrialization technology, require exploitation to have the crucial automatic technology of Rare Earth Separation and the equipment of autonomous property right, and the applied research achievement is set up rare earth extraction separation automation production line in the demonstration base, progressively apply, promote China's rare-earth industry great-leap-forward development in each Rare Earth Production producer.
Summary of the invention
The present invention is one of main contents of " carrying out high-purity Rare Earth Production new equipment and automatic control technology and rare earth extraction detachment process online monitoring system and automatic Control Study " in the above-mentioned brainstorm project, and its objective is provides a kind of rare earth cascade extraction separation intelligence control system.
The present invention has designed the controlling schemes that two covers cooperatively interact; one of them is to be responsible for production run normal loop closed-loop control; another is the intelligent optimization control of carrying out with Optimization Model form the basis work under supervision process; the high-level efficiency of rare-earth cascade extraction separation of produced, stable suitable row, product quality conformance with standard are guaranteed in both cooperations.
Rare earth cascade extraction separation intelligence control system provided by the present invention, it includes active station and by at least one frequency converter, at least one the on-the-spot executive system that parts such as volume pump, at least one flowmeter, at least one liquid level gauge and at least one stirring motor are formed, it is characterized in that:
(1) is equipped with the model station in addition.Active station and model station are connected with (OPC) communication module of telescopiny control criterion and are connected to meet object.
(2) active station carries out communication with on-the-spot executive system and is connected with the fieldbus that is exclusively used in the high speed data transfer between dispersing apparatus (being called for short the Profibus-DP bus) network by Industrial Ethernet with model station and programmable logic controller (hereinafter to be referred as PLC).
The present invention also provides a kind of method that is used to implement rare earth cascade extraction separation intelligence control system, it is characterized in that:
(1) the model station feeds back to active station with the parameters optimization that rule of thumb be drawn with the deviate between the field measurement parameter, assigns the foundation of instruction as active station;
(2) active station and model station are adopted Control Software and Optimization Software executive routine respectively.
The Control Software that active station adopted is made up of main program module, Level Detection module, apparatus logic start and stop module, equipment operation fault diagnosis module, flow value detection module, flow circuit control module, volume pump frequency setting module and communication module, and it is as follows that its master routine is carried out flow process:
(1) liquid level and flow value detection module are at first called in beginning, and the analog signal conversion of spot sensor collection is become actual liquid level value or flow value;
(2) judge the power-off restarting zone bit, if reboot flag then the communication module between initialization PLC and the frequency converter connect, dispose the reboot flag position simultaneously;
(3) judge motor start and stop state, the invocation facility logic starts module;
(4) judge whether flow (feedback) value reads and finish that if do not run through as yet, termination routine is in advance then got back to the program switch execution that circulates again;
(5) if flow value has read to finish and then called the flow circuit control module, up to EOP (end of program), return information is initial to be re-executed.
Above-mentioned said flow circuit control module is to be made up of flow failure prediction submodule, flow quantity intelligent controlling sub and time delay module, and it has flow set and two kinds of control modes of frequency setting, and it is as follows that its control program is carried out flow process:
(1) direct input flow rate setting value judges whether flow setting value variation has taken place, and then calls time delay module if taken place to change, if flow value no longer changes when the time comes, then leaps to flow quantity intelligent control module return information and initially re-executes;
(2) if flow value then calls the pre-utmost point submodule of flow fault and judged whether fault still changing in the time-delay process, if no non-fault is then called the flow quantity intelligent controlling sub, return information initially re-executes;
(3) if fault is arranged, call time delay module once more, in the time-delay process, fault is eliminated (non-fault), then calls the flow quantity intelligent controlling sub, and return information initially re-executes; If still have fault then invocation facility logic start and stop control module termination of pumping and termination routine after the time-delay.
The Optimization Software that the model station is adopted is made up of flow optimization computing module and soft measurement module, and output signal is connected to flow circuit control module input end, and its program implementation flow process is as follows:
(1) at first according to output, product purity index, product recovery rate requirement and duty parameter etc., calls the flow optimization computing module, flow is set for the first time, the flow signal of setting is input in the flow control circuit;
(2) regularly call soft measurement module the elementary composition situation at importance level point place is carried out on-line analysis, determine that it is whether in the value range of regulation;
(3) if bias free illustrates that flow set is reasonable, otherwise with the input signal of this deviate as the flow control circuit control module.
In a single day guaranteeing can not break down for better enforcement rare earth cascade extraction separation intelligence control system of the present invention, also can be that operating personnel find and break down in time, obtain punishment rapidly, effectively.The present invention also is equipped with a cover multimedia monitor system in addition, it adopts monitoring software control, form by Flame Image Process, pick-up lens control, three parts of remote image transmission, and monitor by the microcomputer chamber, show the work picture of on-the-spot executive system (extraction plant) in real time, comprising: parameter setting and record; Automatic or manual control; Running status and fault alarm, the program implementation flow process of monitoring software is as follows:
(1) supervisory system starts;
(2) start production control system;
(3) start the processing parameter interface;
(4) start the extraction plant display interface;
(5) transfer parameter setting, reference record, control automatically, manually control, running status and fault alarm interface successively.
Wherein parameter setting mainly contains: frequency setting; Flow set and stream ratio setting frequently, reference record comprises: frequency values record, flow value record, flow accumulated value record, flow set value record and flow fault alarm record.Fault alarm then comprises: motor fault warning, volume pump fault alarm and flow fault alarm.
Multimedia monitor system makes the operating personnel can be in the indoor situations such as extraction tank phase-splitting, apparatus for production line operation that monitor in real time of microcomputer, thereby in time find and get rid of fault, reduce operating personnel working strength, raise the efficiency to production line stabilization operation provides very effectively and ensure.
Rare earth cascade extraction separation intelligence control system of the present invention has following advantage:
(1) economic, practical, the safety and reliable of native system;
(2) native system has good adaptability and opening;
(3) because system adopts distributed frame, has the good communication ability;
(4) native system has good man computer interface and good back-up capability;
(5) native system has good fault diagnosis functions and alarm logging function;
(6) system also has the good network structure.
Description of drawings
Fig. 1 is the process chart of rare earth extraction detachment process;
Fig. 2 flows to synoptic diagram for the extraction tank inner fluid;
Fig. 3 is a hardware structure diagram of the present invention, wherein the 1-active station; The 2-prototype; 3-PLC; 4 Ethernets; The 5-Profibus-DP bus; The 6-frequency converter; The 7-pump; The 8-flowmeter; The 9-liquid level gauge; 10 stirring motors;
Fig. 4 is the Control Software program structure diagram;
Fig. 5 is the main program module program execution flow figure of Control Software;
Fig. 6 is flow circuit control module program execution flow figure;
Fig. 7 is the flow control system hardware structure diagram;
Fig. 8 is flow circuit control structure figure;
Fig. 9 is an Optimization Software modular concept block diagram;
Figure 10 is the hardware structure diagram of band multimedia monitor system of the present invention, wherein the 1-active station; The 2-prototype; 3-PLC; 4 Ethernets; The 5-Profibus-DP bus; The 6-frequency converter; The 7-pump; The 8-flowmeter; The 9-liquid level gauge; 10 stirring motors; The 11-multimedia monitor system;
Figure 11 is the monitoring software structural drawing;
Figure 12 is that the discharge record curve map is not (before a uses native system; After b uses native system);
Figure 13 controls design sketch in real time for flow;
Figure 14 lanthanum product purity curve record figure.
Embodiment
The prerequisite that content of the present invention is performed sufficient technical know-how below in conjunction with specific embodiment has obtained practical application and has obtained significant effect in the workshop of Rare Earth Production factory.
On the production line of extract and separate extraction yttrium, implement.
Have 54 grades of cascade extraction grooves on this production line, 12 groups of totally 68 stirring motors, 5 flowmeters, 5 volume pumps and 5 frequency converters etc., these have constituted on-the-spot executive system.
The present invention has designed active station and model station, both are connected with (hereinafter to be referred as OPC) communication module of telescopiny control criterion in order to meet the object connection, and are connected with each parts of on-the-spot executive system with the fieldbus networks that is exclusively used in the high speed data transfer between dispersing apparatus by Industrial Ethernet by 1 programmable logic controller (hereinafter to be referred as PLC).
It is indoor that active station and model station all are arranged on the centralized control that extracts workshop.The computing machine of active station sends the PLC controller to model station computing machine by the flow detection value that Profibus-DP transmits through the OPC communication module; Assign as shown in Figure 3 and will receive the flow optimization result to the PLC controller from prototype.The PLC controller by the dynamic adjustment of frequency control motor realization to the loop flow, is stabilized on the setting value it to the flow closed-loop control.
Earlier softwares such as main program module (comprising the flow circuit control program module) and Level Detection module, apparatus logic start and stop control module, equipment operation fault diagnosis module, flow value detection module, volume pump frequency setting module and communication module are assembled in the control computer of active station, and program integrated successively again adjust one by one.
Again softwares such as soft-sensing model and flow optimization setting module are assembled in the computing machine at model station, the adjustment program, making itself and the computing machine of active station set up the OPC communication is connected, realization is carried out the normal read write operation to the flow variable in the flow circuit controls module, and the software configuration of active station computing machine as shown in Figure 4.Soft Survey Software is installed and moved to the computing machine at adjustment model station, and the program circuit of its primary module is as follows:
(1) initialization algorithm module;
(2) create the component concentration soft-sensing model;
(3) read the input data;
(4) start clock;
(5) the monitoring point component content soft is measured;
(6) storage data is to database file;
(7) closing database file;
(8) finish once soft measurement.
Various modules in its algoritic module comprise:
(1) data acquisition module;
(2) data processing module;
(3) identification of Model Parameters module;
(4) soft measuring and calculating module;
(5) parameter correction model;
(6) discriminating data module;
(7) unusual service condition processing module;
(8) operational support module.
The flow optimization setting module software of model station computing machine uses based on the flow optimization of reasoning by cases and expertise and sets scheme, and its collaborative computer with the biconditional operation station moves, and with the soft-sensing model use that combines.
With the tandem separating and extracting Based Intelligent Control of system implementation of the present invention to yttrium, try to achieve the cluster centre of historical data and determine its model parameter with soft-sensing model by the model station earlier, see Table 1.
| The center | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Y content (%) | The α value | The β value | The γ value |
| ????1 | ????50 | ????5.7 | ????4.5 | ????10 | ??89.3 | ??0.125 | ??0.0393 | ??0.059 |
| ????2 | ????30 | ????3.3 | ????2 | ????6 | ??87.6 | ??0.265 | ??0.0621 | ??0.153 |
| ????3 | ????72 | ????7.5 | ????6.8 | ????14 | ??84.2 | ??0.323 | ??0.022 | ??0.093 |
| ????4 | ????40 | ????4.3 | ????4 | ????8.5 | ??87.6 | ??0.143 | ??0.04 | ??0.159 |
| ????5 | ????60 | ????6.5 | ????5 | ????13.5 | ??82.5 | ??0.137 | ??0.0265 | ??0.132 |
| ????6 | ????30 | ????2.6 | ????4 | ????2 | ??87.3 | ??0.314 | ??0.052 | ??0.156 |
| ????7 | ????40 | ????4.3 | ????2 | ????7.5 | ??82.5 | ??0.165 | ??0.048 | ??0.137 |
| ????8 | ????60 | ????6.4 | ????5.4 | ????11 | ??85.6 | ??0.185 | ??0.0353 | ??0.152 |
Table 1 cluster centre and model parameter (δ
aValue 4.2)
With cluster centre and model parameter substitution soft-sensing model, calculate the predicted value of the elementary composition percentage composition of place, monitoring point yttrium.
Call the optimization setting value that flow optimization set-up and calculated module draws organic (extract) flow, ammoniacal liquor flow, feed liquid flow and the acid solution flow of extraction tank, and with this setting value as the bare flow loop, and send this setting value to the active station computing machine by OPC, active station calculation machine downloads to setting value in the PLC controller then, the PLC master routine is carried out flow process as shown in Figure 5, that is:
(1) liquid level and flow value detection module are at first called in beginning, and the analog signal conversion of spot sensor collection is become actual liquid level value or flow value;
(2) judge the power-off restarting zone bit, if reboot flag then the communication module between initialization PLC and the frequency converter connect, dispose the reboot flag position simultaneously;
(3) judge motor start and stop state, the invocation facility logic starts module;
(4) judge whether flow (feedback) value reads and finish that if do not run through as yet, termination routine is in advance then got back to the program switch execution that circulates again;
(5) if flow value has read to finish and then called the flow circuit control module, up to EOP (end of program), return information is initial to be re-executed.
The program of flow circuit control as shown in Figure 6.That is:
(1) direct input flow rate setting value judges whether flow setting value variation has taken place, and then calls time delay module if taken place to change, if flow value no longer changes when the time comes, then leaps to flow quantity intelligent control module return information and initially re-executes;
(2) if flow value then calls the pre-utmost point submodule of flow fault and judged whether fault still changing in the time-delay process, if no non-fault is then called the flow quantity intelligent controlling sub, return information initially re-executes;
(3) if fault is arranged, call time delay module once more, in the time-delay process, fault is eliminated (non-fault), then calls the flow quantity intelligent controlling sub, and return information initially re-executes; If still have fault then invocation facility logic start and stop control module termination of pumping and termination routine after the time-delay.
Its flow control system is controlled to be example with feed liquid, and hardware configuration as shown in Figure 7.Opening inlet valve pumps in the extraction tank with the various liquid circulation inflow-rate of water turbine meters of volume pump with the feed liquid storage tank, the flow value of feed liquid feeds back in the PLC controller by flowmeter and contrasts with flow setting value, with both frequencies of difference control of conversion device, pass through the operation of Frequency Converter Control volume pump again, determine the running status of volume pump, to reach the purpose of flow control.Such control system has four classes, controls organic liquor, ammoniacal liquor, feed liquid and acid solution respectively, the continuous operation of common guarantee extraction production line.
More detailed flow circuit control structure then as shown in Figure 8, its running program is as follows:
(1) earlier parameters such as product purity desired value, feed liquid component concentration, feed liquid treatment capacity desired value, boundary condition are input in the flow optimization setting module, this module is located in the prototype.The output of flow optimization setting module is connected to the flow quantity intelligent controlling sub of the flow circuit control system of active station computing machine, this module receives the flow setting value of flow optimization setting module, calculate the corresponding measuring pump setpoint frequency by intelligent optimization algorithm, by the operation of Frequency Converter Control volume pump.Delivery rate converts digital signal to by the flow transmitting module and feeds back to flow optimization setting value relatively after flowmeter detects, thereby realizes the closed circuit control of flow.
Intelligence control system realizes the flow control of solution such as extraction tank is organic, ammoniacal liquor, feed liquid, acid solution product.The control curve as shown in figure 12, a be the flow curve before the not control among the figure, the curve of b after for control can obviously be found out the effect of control, flow actual value and setting value be fine reaches stablize identical.And the closed circuit control effect of flow as shown in figure 13, and be 2 days its writing time, and the closed loop of flow is controlled effect as shown in figure 12 in real time, and be 2 days writing time.Wherein, public horizontal ordinate is writing time, and ordinate is a flow value.Curve is followed successively by one section feed liquid, sour regurgitation, organic extractant, ammoniacal liquor and yttrium product (two sections feed liquids) from top to bottom.Continuous two days operation result demonstration stability of flow and control accuracy are higher.The purity measured value of a period of time monitoring point yttrium and soft measurement predicted value are as shown in table 2.
| Numbering | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Y content (%) | Monitoring point Y content assay value (%) | Monitoring point Y content model predication value (%) |
| ????1 | ????50 | ????6.8 | ????3 | ????15 | ??84.5 | ????96.3 | ????96.13 |
| ????2 | ????50 | ????6.8 | ????3 | ????15 | ??83.1 | ????96.5 | ????95.66 |
| ????3 | ????50 | ????6.8 | ????3 | ????10 | ??79.7 | ????89.7 | ????89.09 |
| ????… | ????… | ????… | |||||
| ????48 | ????30 | ????2.6 | ????4.5 | ????2 | ??89.5 | ????97.8 | ????97.99 |
| ????49 | ????40 | ????2.6 | ????4.5 | ????2.5 | ??84.1 | ????96.5 | ????94.7 |
| ????50 | ????50 | ????3.5 | ????6.5 | ????3 | ??82.3 | ????94.3 | ????91.64 |
Table 2 monitoring point Y
2O
3Purity laboratory values and predicted value contrast
The intelligence control system that the cascade extraction of rare earth cerium separates.
This intelligence control system as shown in figure 10.It has 54 grades of extraction tanks, has 54 stirring motors, 5 flowmeters, 5 volume pumps and 5 frequency converters etc., and they have constituted the on-the-spot topworks of extracting cerium.
The same with above-mentioned embodiment, also designed active station and model station, between them interconnect and they also take the mode identical with embodiment 1 with the connection between the on-the-spot executive system, repeat no more herein.
In order to guarantee the safe operation of system of the present invention better, even if in case break down and also can obtain punishment quickly and effectively in time for operating personnel find.Be added with a cover multimedia monitor system in the present embodiment in addition.It adopts monitoring software control, and this software is made up of Flame Image Process, pick-up lens control and three parts of remote image transmission, and by the monitoring of microcomputer chamber, shows the work picture of on-the-spot executive system (extraction plant) in real time.This system comprises as shown in figure 12
Parameter setting and record; Automatic or manual control; Running status and fault alarm, the program implementation flow process of monitoring software is as follows:
(1) starts;
(2) start production control system;
(3) start the processing parameter interface;
(4) start the extraction plant display interface;
(5) transfer parameter setting, reference record, control automatically, manually control, running status and fault alarm interface successively.
Wherein parameter setting mainly contains: frequency setting; Flow set and stream ratio setting frequently, reference record comprises: frequency values record, flow value record, flow accumulated value record, flow set value record and flow fault alarm record.Fault alarm then comprises: motor fault warning, volume pump fault alarm and flow fault alarm.
Multimedia monitor system makes the operating personnel can be in the indoor situations such as extraction tank phase-splitting, apparatus for production line operation that monitor in real time of microcomputer, thereby in time find and get rid of fault, reduce operating personnel working strength, raise the efficiency to production line stabilization operation provides very effectively and ensure.
The same with embodiment 1, when adopting system of the present invention, try to achieve the cluster centre and the model parameter (as shown in table 3) of historical data earlier with soft-sensing model by the model station, calculating the purity predicted value by soft-sensing model, is the optimal control value that the basis obtains organic (extraction) liquid, ammoniacal liquor, feed liquid and each flow of acid solution of extraction tank with this predicted value.
| The center | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Ce content (%) | The α value | The β value | The γ value |
| ????1 | ????77 | ????6.15 | ????6.55 | ????2.1 | ????45.5 | ?0.049 | ?0.0204 | ?0.0351 |
| ????2 | ????75 | ????6 | ????6.73 | ????2.4 | ????44.4 | ?0.0542 | ?0.0214 | ?0.043 |
| ????3 | ????73 | ????6.2 | ????6.75 | ????2.3 | ????52.1 | ?0.0552 | ?0.0211 | ?0.0412 |
| ????4 | ????75 | ????6 | ????6.5 | ????2.4 | ????42.5 | ?0.0526 | ?0.0221 | ?0.044 |
| ????5 | ????71 | ????5.7 | ????7 | ????2.4 | ????55.1 | ?0.0509 | ?0.0231 | ?0.047 |
| ????6 | ????75 | ????6 | ????6.3 | ????2.1 | ????42.2 | ?0.0519 | ?0.0221 | ?0.0454 |
Table 3 cluster centre and model parameter (δ
aValue 2.45)
This setting value is as the flow setting value of flow circuit control module.Below the 1 described program with embodiment is all adopted in operation.
Different is in operating process, and operating personnel can extraction tank be clearly demarcated, the ruuning situation of apparatus for production line by monitoring in real time, intuitively as Figure 11 and multimedia monitor system shown in Figure 12.
Final operating personnel contrast (seeing Table 4) from the monitoring point with the actual laboratory values of the purity of cerium with the model optimal value, and its error meets the determined index of technical standard of enterprise fully.
| Numbering | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Ce content (%) | Monitoring point Ce content assay value (%) | Monitoring point Ce content model predication value (%) |
| ????1 | ????75 | ????6 | ????6.4 | ????2.3 | ??45 | ????66.4 | ????67.92 |
| ????2 | ????75 | ????6 | ????5.95 | ????2 | ??50.8 | ????71.6 | ????70.34 |
| ????3 | ????75 | ????6 | ????6.03 | ????2 | ??51.1 | ????72.6 | ????71.78 |
| ????… | ????… | ????… | |||||
| ????48 | ????74 | ????5.9 | ????6.4 | ????2 | ??47.2 | ????73.7 | ????74.7 |
| ????49 | ????74 | ????5.95 | ????6.27 | ????1.9 | ??48.3 | ????73.7 | ????69.17 |
| ????50 | ????74 | ????5.95 | ????6.27 | ????1.9 | ??47.6 | ????74.5 | ????67.5 |
Table 4 monitoring point CeO
2Purity laboratory values and predicted value contrast
The intelligence control system that the cascade extraction of praseodymium separates.
This intelligence control system can adopt as Fig. 3 or shown in Figure 10, and it has 54 grades of extraction tanks, has 54 stirring motors; 5 flowmeters and 5 frequency converters etc., they have constituted the on-the-spot topworks of extracting cerium.
The same with above-mentioned embodiment, also designed active station and model station, between them interconnect and they also take the mode identical with embodiment 1 with the connection between the on-the-spot executive system, repeat no more herein.
In order to guarantee the safe operation of system of the present invention better, even if in case break down and also can obtain punishment quickly and effectively in time for operating personnel find.Be added with a cover multimedia monitor system in the present embodiment in addition.
The same with above-mentioned embodiment, earlier try to achieve the cluster centre and the model parameter (as shown in table 5) of historical data with soft-sensing model by the model station, draw the optimal control value of organic (extraction) liquid, ammoniacal liquor, feed liquid and each flow of acid solution of each monitoring point then.
| The center | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Pr content (%) | The α value | The β value | The γ value |
| ????1 | ????75 | ????6 | ????6.45 | ????2.2 | ????8.1 | ??0.045 | ??0.025 | ??0.016 |
| ????2 | ????71 | ????5.9 | ????6.8 | ????2.4 | ????4.7 | ??0.049 | ??0.0265 | ??0.021 |
| ????3 | ????75 | ????6 | ????6.4 | ????2.1 | ????9.6 | ??0.053 | ??0.023 | ??0.022 |
| ????4 | ????71 | ????5.7 | ????6.9 | ????2.4 | ????5.1 | ??0.054 | ??0.0247 | ??0.037 |
| ????5 | ????75 | ????6.15 | ????6.65 | ????2.2 | ????5.4 | ??0.041 | ??0.0233 | ??0.032 |
| ????6 | ????75 | ????6.1 | ????6.95 | ????2.4 | ????9 | ??0.047 | ??0.0226 | ??0.043 |
Table 5 cluster centre and model parameter (δ
aValue 2.2)
This setting value is as the flow setting value of flow circuit control module.Below the 1 described program with embodiment is all adopted in operation.
Final operating personnel contrast (seeing Table 6) from the monitoring point with the actual laboratory values of the purity of praseodymium with the model optimal value, and its error meets the determined index of technical standard of enterprise fully.
| Numbering | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging Pr content (%) | Monitoring point Pr content assay value (%) | Monitoring point Pr content model predication value (%) |
| ????1 | ????75 | ????6 | ????6.3 | ????2 | ????8.4 | ????3.4 | ????3.11 |
| ????2 | ????75 | ????5.95 | ????6.3 | ????2 | ????6.4 | ????2 | ????1.99 |
| ????3 | ????73 | ????5.9 | ????6.3 | ????2 | ????7.5 | ????2.3 | ????2.31 |
| ????… | ????… | ????… | |||||
| ????48 | ????69 | ????5.15 | ????5.8 | ????1.85 | ????5.6 | ????1.5 | ????1.63 |
| ????49 | ????69 | ????5.15 | ????5.8 | ????1.85 | ????5.4 | ????1.5 | ????1.61 |
| ????50 | ????69 | ????5.15 | ????5.8 | ????1.85 | ????5.1 | ????1.4 | ????1.51 |
Table 6 monitoring point Pr
6O
11Purity laboratory values and predicted value contrast
Embodiment 4
The intelligence control system that the cascade extraction of Rare Earth Lanthanum separates.
This intelligence control system as shown in figure 10.It has 54 grades of extraction tanks, has 54 stirring motors, 5 flowmeters, 5 volume pumps and 5 frequency converters etc., and they have constituted the on-the-spot topworks of extracting cerium.
The same with above-mentioned embodiment, also designed active station and model station, between them interconnect and they also take the mode identical with embodiment 1 with the connection between the on-the-spot executive system, repeat no more herein.
In order to guarantee the safe operation of system of the present invention better, even if in case break down and also can obtain punishment quickly and effectively in time for operating personnel find.Be added with a cover multimedia monitor system in the present embodiment in addition.
The same with above-mentioned embodiment, earlier try to achieve the cluster centre and the model parameter (as shown in table 7) of historical data with soft-sensing model by the model station, draw the optimal control value of organic (extraction) liquid, ammoniacal liquor, feed liquid and each flow of acid solution of each monitoring point then.
| The center | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging La content (%) | The α value | The β value | The γ value |
| ????1 | ????75 | ????5.95 | ??6.95 | ??2.5 | ??26.1 | ?0.0321 | ?0.0221 | ?0.0473 |
| ????2 | ????71 | ????5.9 | ??6.8 | ??2.4 | ??25.6 | ?0.0331 | ?0.0237 | ?0.0453 |
| ????3 | ????75 | ????6 | ??6.3 | ??2.1 | ??30.3 | ?0.0338 | ?0.0235 | ?0.0452 |
| ????4 | ????75 | ????6 | ??6.7 | ??2.4 | ??38.8 | ?0.0343 | ?0.0235 | ?0.047 |
| ????5 | ????75 | ????6.1 | ??6.95 | ??2.5 | ??28.1 | ?0.0343 | ?0.0236 | ?0.043 |
| ????6 | ????73 | ????6.2 | ??6.75 | ??2.3 | ??24.2 | ?0.0359 | ?0.0224 | ?0.051 |
| ????7 | ????75 | ????6 | ??6.73 | ??2.4 | ??39.7 | ?0.0362 | ?0.0242 | ?0.0465 |
| ????8 | ????75 | ????6 | ??6.6 | ??2.4 | ??35.9 | ?0.0317 | ?0.023 | ?0.0418 |
Table 7 cluster centre and model parameter (δ
aValue 2.4)
This setting value is as the flow setting value of flow circuit control module.Below the 1 described program with embodiment is all adopted in operation.
Final operating personnel contrast (seeing Table 8) from the monitoring point with the actual laboratory values of the purity of lanthanum with the model optimal value, and its error meets the determined index of technical standard of enterprise fully.
| Numbering | Organic flow | The ammoniacal liquor flow | The feed liquid flow | The acid solution flow | Charging La content (%) | Monitoring point La content assay value (%) | Monitoring point La content model predication value (%) |
| ????1 | ????75 | ????6 | ????6.4 | ????2.3 | ??26.6 | ????26.1 | ????27.06 |
| ????2 | ????75 | ????6 | ????5.95 | ????2 | ??24 | ????23.1 | ????24.28 |
| ????3 | ????75 | ????6 | ????6.03 | ????2 | ??22.6 | ????22.5 | ????22.95 |
| ????… | ????… | ????… | |||||
| ????48 | ????74 | ????5.9 | ????6.4 | ????2 | ??23.6 | ????21.9 | ????23.99 |
| ????49 | ????74 | ????5.95 | ????6.27 | ????1.9 | ??24.1 | ????23.6 | ????24.25 |
| ????50 | ????74 | ????5.95 | ????6.27 | ????1.9 | ??25.6 | ????23.2 | ????23.64 |
Table 8 monitoring point La
2O
3Purity laboratory values and predicted value contrast
Figure 14 is lanthanum component product purity curve record figure, wherein horizontal ordinate be the time (my god); Ordinate is the percent by weight of product purity.As can be seen from the figure half wheat harvesting period is continuous 20 days, and product purity satisfies production requirement fully all greater than 99.5%, and this explanation the present invention get a desired effect, and created good social benefit and economic benefit.
Claims (7)
1, a kind of rare earth cascade extraction separation intelligence control system, include active station, by the on-the-spot executive system that at least one frequency converter, at least one volume pump, at least one flowmeter, at least one liquid level gauge and at least one stirring motor etc. are formed, it is characterized in that:
(1) be equipped with the model station in addition, active station and model station are connected with (OPC) communication module of telescopiny control criterion and are connected to meet object;
(2) active station and model station and programmable logic controller (PLC) carry out communication with the fieldbus networks that is exclusively used in the high speed data transfer between dispersing apparatus with on-the-spot executive system by Industrial Ethernet and are connected.
2, a kind of method that is used to implement the described rare earth cascade extraction separation intelligence control system of claim 1 is characterized in that:
(1) the model station feeds back to active station with the parameters optimization that rule of thumb be drawn with the deviate between the field measurement parameter, assigns the foundation of instruction as active station;
(2) active station and model station are adopted Control Software and Optimization Software executive routine respectively.
3, by the described rare-earth cascade extraction separated intelligent of claim 2 control method, it is characterized in that said Control Software is made up of main program module, Level Detection module, apparatus logic start and stop module, equipment operation fault diagnosis module, flow value detection module, flow circuit control module, volume pump frequency setting module and communication module, it is as follows that its master routine is carried out flow process:
(1) liquid level and flow value detection module are at first called in beginning, and the analog signal conversion of spot sensor collection is become actual liquid level value or flow value;
(2) judge the power-off restarting zone bit, if reboot flag then the communication module between initialization PLC and the frequency converter connect, dispose the reboot flag position simultaneously;
(3) judge motor start and stop state, the invocation facility logic starts module;
(4) judge whether the flow value of feedback reads and finish, if do not run through as yet, termination routine in advance then, the program of getting back to begins the execution that circulates again;
(5) if flow value has read to finish and then called the flow circuit control module, up to EOP (end of program), return information is initial to be re-executed.
3, by claim 2,3 described rare earth cascade extraction separation intelligence control systems, it is characterized in that said flow circuit control module is made up of flow failure prediction submodule, flow quantity intelligent controlling sub and time delay module, flow circuit control comprises flow set and two kinds of control modes of frequency setting, and it is as follows that its control program is carried out flow process:
(1) direct input flow rate setting value judges whether flow setting value variation has taken place, and then calls time delay module if taken place to change, if flow value no longer changes when the time comes, then leaps to flow quantity intelligent control module return information and initially re-executes;
(2) if flow value then calls flow failure prediction submodule and judged whether fault still changing in the time-delay process, if no non-fault is then called the flow quantity intelligent controlling sub, return information initially re-executes;
(3) if fault is arranged, call time delay module once more, in the time-delay process, fault is eliminated (non-fault), then calls the flow quantity intelligent controlling sub, and return information initially re-executes; If still have fault then invocation facility logic start and stop control module termination of pumping and termination routine after the time-delay.
4, by the described rare-earth cascade extraction separated intelligent of claim 2 control method, it is characterized in that said Optimization Software is made up of flow optimization set-up and calculated module and soft measurement module, its output signal is connected to flow circuit control module input end, and its program implementation flow process is as follows:
(1) at first according to output, product purity index, product recovery rate requirement and duty parameter etc., calls the flow optimization computing module, flow is set for the first time, the flow signal of setting is input in the flow control circuit;
(2) regularly call soft measurement module the elementary composition situation at importance level point place is carried out on-line analysis, determine that it is whether in the value range of regulation;
(3) if bias free illustrates that flow set is reasonable, otherwise with the input signal of this deviate as the flow control circuit control module.
5, by the described rare earth cascade extraction separation intelligence control system of claim 1, it is characterized in that being equipped with in addition one and overlap the multimedia monitor system that is used with active station, it is connected with on-the-spot executive system with PLC with Industrial Ethernet, the control of employing monitoring software, form by Flame Image Process, pick-up lens control, three parts of remote image transmission, and, show the work picture at extraction plant scene on the spot by the monitoring of microcomputer chamber.
6, by the described rare earth cascade extraction separation intelligence control system of claim 5, it is characterized in that said monitoring software comprises: parameter setting and record; Automatic or manual control; Running status and fault alarm, the program implementation flow process of monitoring software is as follows:
(1) supervisory system starts;
(2) start production control system;
(3) start the processing parameter interface;
(4) start the extraction plant display interface;
(5) transfer parameter setting, reference record, control automatically, manually control, running status and fault alarm interface successively.
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| CN102004444A (en) * | 2010-11-23 | 2011-04-06 | 华东交通大学 | Multi-model predictive control method for component content in process of extracting rare earth |
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| CN1060966C (en) * | 1993-02-12 | 2001-01-24 | 李英杰 | Autocontrol method for fractional extraction process |
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| CN111142582B (en) * | 2020-01-13 | 2021-04-13 | 东北大学 | Intelligent control system of rare earth extraction production process |
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