CN200950228Y - Equipment for controlling coagulant dosage - Google Patents
Equipment for controlling coagulant dosage Download PDFInfo
- Publication number
- CN200950228Y CN200950228Y CN 200620054363 CN200620054363U CN200950228Y CN 200950228 Y CN200950228 Y CN 200950228Y CN 200620054363 CN200620054363 CN 200620054363 CN 200620054363 U CN200620054363 U CN 200620054363U CN 200950228 Y CN200950228 Y CN 200950228Y
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- China
- Prior art keywords
- coagulant
- processor
- dosage
- alumen ustum
- water
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- Expired - Lifetime
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Abstract
The utility model discloses a coagulation dosage control equipment. The utility model comprises a Video camera device for capturing the images of the alum features, a coagulant supplementation device and a processor. The video camera device and the coagulant supplementation device are connected respectively with the processor. The utility model is characterized in that: the video camera device captures the images of the alum features and carries the images of the alum features to the processor, which calculates the point of dimension D<f> of the alum, determines the coagulant supplementation amount P according to the corresponding relation between the coagulant supplementation amount P and the point of dimension of the alum D<f>, that is, P=F(D<f>), and finally carries the instruction of the coagulant supplementation amount P to the coagulant supplementation device which receives the instruction of the supplementation amount P and supplements coagulant into the reaction tank.
Description
Technical field
The utility model relates to a kind of administration apparatus of engineering of water treatment, specifically relates to a kind of coagulation administration opertaing device, the control to offeing medicine when mainly being applicable to the coagulating treatment of carrying out water in the engineering of water treatment.
Background technology
In water treatment plant's coagulation process process, how reasonably determine the dosage of coagulant according to the requirement of the variation of former water condition (water quality, the water yield) and settled water turbidity, realize optimum control, promptly under the prerequisite that guarantees heavy back water water quality, make the consumption minimum of coagulant, reduce water producing cost, be the critical problem of coagulation process control always.For this reason, existing several different methods is used for coagulation administration to be controlled automatically, as the mathematics modelling, and on-the-spot midget plant simulation, streaming current (SCD) method and display type flocculation dispensing control method (FCD) etc.
The foundation of mathematical model often needs long-term a large amount of test figure, but numerous because of the factor that influences coagulation administration, as the water yield, organic content, pH value, temperature and the illumination etc. of former water, the variation of these conditions all will directly have influence on the coagulating treatment effect.In the water preparation process process, for the detection of these parameters and judge the dosage more complicated of coagulant according to the variation of these parameters, system is difficult to provide comprehensive reference, and for the water body of heavy contamination or change bigger water quality, its reliability is also relatively poor.Adopt on-the-spot midget plant simulation can make control procedure that arranged 10～20 minutes retardation time, inapplicable for water quality jumpy; And be difficult to provide the on all four simulation of actual production settling basin treatment conditions.Streaming current method (SCD) is the variation according to water-borne glue body particle Zeta potential behind the coagulant dosage, thereby cause the variation of streaming current, what of dose variation by the sensor streaming current to add in the reflection water, and by transmitting signal to detecting controller, adjust the dosage of dosing pump, make it to reach optimum value, but SCD has relatively high expectations to control system, because of the sensor of streaming current control system pick-up unit is directly to contact with water sample, very easily polluted, the wearing and tearing of probe, dirty and obstruction etc., detection signal is drifted about, fluctuation or sensitivity reduce, thereby cause the control system cisco unity malfunction, need consider the pre-service of water sample and the regular cleaning and the replacing of probe for this reason, the line service workload is big like this, the expense height.Therefore, the development trend of coagulation administration control at present mainly is to concentrate on by setting up can reflect well on the alumen ustum characteristic parameter of coagulation effect, characterizes coagulation degree and treatment effect by characteristic parameter, and optimizes the dosage of coagulant with this.The display type of prior art flocculation dispensing control method (FCD) is by the flocculate image of velvet-like body of underwater sensor collection, pass through computer image treatment, calculate its " equivalent diameter " and reflect settling velocity, and compare with this numerical value and setting value, after PID calculates, regulate the dosage of coagulant.But display type flocculation dispensing control method (FCD), its sensor is provided with the current deceleration, thereby fails to reflect truly streamflow regime, very easily sticks particle when current from top to down process viewfinder, thereby influence the statistics and the analysis result of controlled variable, mislead dispensing; The only terminal 20cm of its probe can immerse in the water, can not stretch into fully under water, and the installation site is restricted; During Long-distance Control, anti-interference is poor; The alumen ustum particle diameter of FCD control increases along with the increase of dosage within the specific limits, in case exceed this scope, the alumen ustum particle diameter can diminish, and is inconsistent with its control principle, thereby causes the serious excessive problem of coagulant dosage.
Therefore, in the coagulation administration control procedure of reality, said method all exists such or such problem, make water treatment plant in actual moving process, mostly be the dosage of testing or rely on the practical experience manual shift coagulant of tradesman's long-term accumulation by beaker, realize that truly adding automatically of coagulant is also few, therefore automatic control and the adjusting for coagulation administration is still waiting further solution and perfect.
Summary of the invention
The purpose of this utility model is to provide a kind of coagulation administration opertaing device, the utility model is by measuring the signal directly related with coagulation effect, thereby control dosage more accurately and efficiently, improve the stability of coagulating treatment quality and dispensing control, realize more effective dosage control, save dosage.
For achieving the above object, the utility model has been taked following technical scheme:
A kind of coagulation administration control system, comprise video camera device, coagulant dosage device and the processor of catching the alumen ustum feature image, the video camera device is connected with processor respectively with the coagulant dosage device, the video camera device is caught the alumen ustum feature image, and the alumen ustum feature image is flowed to processor; Processor calculates the branch dimension D of alumen ustum
f, and according to the dosage P of coagulant and the branch dimension D of alumen ustum
fBetween corresponding relation P=F (D
f), determine coagulant charging quantity P, the instruction with coagulant charging quantity P at last flows to the coagulant dosage device; The coagulant dosage device receives the instruction of dosage P, dosing coagulant in reaction tank.
Described coagulation administration opertaing device also comprises the flowmeter that is connected with processor, and flowmeter is measured former water water yield Q earlier, and former water water yield Q is flowed to processor; Processor is determined coagulant plan dosage P according to the corresponding relation P=F (Q) between coagulant charging quantity P and the former water water yield Q
1Determine coagulant charging quantity then with the following method:
P＝P
1+P
2，
P
2=F (| D
f-D
0|), when | D
f-D
0|＜Δ D
0The time, P
2=0
Following formula is described: the P-coagulant charging quantity,
P
1-coagulant is intended dosage;
P
2-coagulant is adjusted dosage
D
fThe branch dimension of-alumen ustum
D
0The branch dimension desired value of-alumen ustum;
Δ D
0The D of-permission
fWith respect to D
0Undulating quantity.
Described coagulation administration opertaing device also comprises the turbidity detector that is connected with processor, and the turbidity detector is measured the turbidity T of heavy back water, and the turbidity T of water flows to processor after will sinking; Processor is according to the target turbidity T of heavy back water
0, the branch dimension desired value D of feedback regulation alumen ustum
0
Utilize the utility model can realize a kind of coagulation administration control method, a kind ofly mainly determine coagulant charging quantity according to the variation of alumen ustum branch dimension, the method for controlling automatically, this method mainly comprises the steps:
1, dosing coagulant, the branch dimension D of alumen ustum in the assaying reaction process
f,
2, according to the dosage P of coagulant and the branch dimension D of alumen ustum
fBetween corresponding relation P=F (D
f), determine coagulant charging quantity P,
3, the coagulant charging quantity P that determines according to second step, dosing coagulant among the Xiang Yuanshui.
Compared with prior art, coagulation administration opertaing device of the present utility model and control method thereof are in the process of water treatment, by measuring the branch dimension D of the alumen ustum directly related with coagulation effect
fThereby, control dosage more accurately and efficiently, improve the coagulating sedimentation effect, also improve the stability of dispensing control in addition, realize more effective dosage control, save dosage.
Description of drawings
Fig. 1 is the structural representation of the utility model coagulation administration control system;
Fig. 2 is the process flow diagram of the coagulation administration control method of the utility model realization.
Embodiment
The utility model is described in further detail below in conjunction with Figure of description, but the utility model scope required for protection is not limited to the scope that embodiment is described.
Accompanying drawing 1 is the structural representation of the utility model coagulation administration control system;
As shown in Figure 1, a kind of coagulation administration control system, comprise video camera device, coagulant dosage device and the processor of catching the alumen ustum feature image, the video camera device is connected with processor respectively with the coagulant dosage device, it is characterized in that, the video camera device is caught the alumen ustum feature image, and the alumen ustum feature image is flowed to processor; Processor calculates the branch dimension D of alumen ustum
f, and according to the dosage P of coagulant and the branch dimension D of alumen ustum
fBetween corresponding relation P=F (D
f), determine coagulant charging quantity P, the instruction with coagulant charging quantity P at last flows to the coagulant dosage device; The coagulant dosage device receives the instruction of dosage P, dosing coagulant in reaction tank.
Above-mentioned coagulation administration control system also comprises the flowmeter that is connected with processor, and flowmeter is measured former water water yield Q earlier, and former water water yield Q is flowed to processor; Processor is determined coagulant plan dosage P according to the corresponding relation P=F (Q) between coagulant charging quantity P and the former water water yield Q
1Determine coagulant charging quantity then with the following method:
P＝P
1+P
2，
P
2=F (| D
f-D
0|), when | D
f-D
0|＜Δ D
0The time, P
2=0
The described P-coagulant charging quantity of following formula,
P
1-coagulant is intended dosage;
P
2-coagulant is adjusted dosage
D
fThe branch dimension of-alumen ustum
D
0The branch dimension desired value of-alumen ustum;
Δ D
0The D of-permission
fWith respect to D
0Undulating quantity.
Above-mentioned coagulation administration control system also comprises the turbidity detector that is connected with processor, and the turbidity detector is measured the turbidity T of heavy back water, and the turbidity T of water flows to processor after will sinking; Processor is according to the target turbidity T of heavy back water
0, the branch dimension desired value D of feedback regulation alumen ustum
0
Accompanying drawing 2 is the process flow diagram of the coagulation administration control method of the utility model realization.
As shown in Figure 2, the coagulation administration control method comprises following technical step:
1, dosing coagulant, the branch dimension D of alumen ustum in the assaying reaction process
f
2, according to the dosage P of coagulant and the branch dimension D of alumen ustum
fBetween corresponding relation P=F (D
f), determine coagulant charging quantity P;
3, the coagulant charging quantity P that determines according to second step, dosing coagulant among the Xiang Yuanshui.
In order to obtain better effect, above-mentioned coagulation administration control method can be measured described former water water yield Q earlier, according to the corresponding relation P=F (Q) between coagulant charging quantity P and the former water water yield Q, determines coagulant plan dosage P
1Carry out the branch dimension D of alumen ustum in the described first step assaying reaction process then
fDescribed second step determines that the method for coagulant charging quantity P is:
P＝P
1+P
2，
P
2=F (| D
f-D
0|), when | D
f-D
0|＜Δ D
0The time, P
2=0
The described P-coagulant charging quantity of following formula,
P
1-coagulant is intended dosage;
P
2-coagulant is adjusted dosage
D
fThe branch dimension of-alumen ustum
D
0The branch dimension desired value of-alumen ustum;
Δ D
0The Df of-permission is with respect to D
0Undulating quantity.
Above-mentioned coagulation administration control method can also be after measuring described former water water yield Q, becomes controlled variable when determining according to the changes delta Q of the former water water yield, becomes the branch dimension desired value D of controlled variable adjusting alumen ustum when described
0
Above-mentioned coagulation administration control method also can be after described the 3rd step, will add coagulant former water through mix, reaction and precipitation, obtain heavy back water; Measure the turbidity T of heavy back water, then the target turbidity T of the heavy back of basis water
0, feedback regulation alumen ustum branch property dimension desired value D
0
Coagulation administration control system of the present invention, be called for short FDA (Fractal Dimension Analyzer) system, its essence is according to fractal theory, by fractal tectonic analysis, utilize fractal dimension to describe the structure and the form of alumen ustum quantitatively, the random degree of reflection alumen ustum.And then, determine coagulant charging quantity according to the random degree of alumen ustum and the closely related property between the coagulant charging quantity.
In the coagulation process process, the variation of caused coagulation degree of the variation of former water condition and treatment effect all can be reflected by the alumen ustum structure that forms behind the dosing coagulant and the variation of form.The formation of alumen ustum has fractal characteristic, by fractal tectonic analysis, utilizes fractal dimension to provide quantitative description to the structure and the form of alumen ustum, the random degree of reflection alumen ustum.At the variation of former water condition, change the dosage of coagulant, the fractal dimension of alumen ustum also changes thereupon, and shows good correlationship with settled water turbidity.The utility model is realized the automatic control of coagulant dosage by setting up the corresponding relation between coagulant charging quantity, alumen ustum fractal dimension and the settled water turbidity three.
FDA coagulation administration control system mainly comprises former water water yield feedforward control, the control of alumen ustum fractal dimension rear feed, reaches three ingredients of settled water turbidity feedback regulation.The alumen ustum picture intelligence is gathered by the video camera device by system, simultaneously with raw water flow signal and settled water turbidity signal input microprocessor system, by model control analysis output dosage control signal, regulates the dosage of coagulant.
In the control procedure, system at first tentatively determines the dosage of coagulant according to certain proportionate relationship according to the variation of raw water flow, on this basis, gather the alumen ustum picture intelligence by the video camera device, calculate the fractal dimension of alumen ustum by image analysis, according to the fractal dimension of alumen ustum and the corresponding relation of settled water turbidity, further regulate the dosage of coagulant.In the coagulation process process, because of changing the deposition condition that causes, various conditions change, all will bring the variation of the fractal dimension desired value of alumen ustum, system will come the fractal dimension desired value of feedback regulation alumen ustum according to the variation of settled water turbidity, thereby the variation that makes control system adapt to the variation of various conditions in the coagulation process process more exactly and cause to the coagulant demand, the dosage of adjusting coagulant.
In view of the complicacy of water treatment plant's coagulation process operation and the demand of adaptation different situations, dispensing control can be divided into control and non-control two states, and the FDA system can realize automatic control and manual shift dual mode.
The FDA system at first tentatively determines the dosage of coagulant with the former water water yield.Microprocessor system is gathered former water water yield signal by electromagnetic flowmeter, and tentatively determines the plan dosage P of coagulant according to the proportionate relationship of the dosage of coagulant and the former water water yield
1Consider the influence of the variation of the water yield to the settling basin operating load, simultaneously in order to shorten with settled water turbidity feedback regulation alumen ustum fractal dimension desired value than long retardation time, become controlled variable when flow is set, regulate the variation of the fractal dimension desired value that the variation because of the water yield causes.
The video camera device can be gathered a width of cloth alumen ustum feature picture per 5 seconds, calculates the alumen ustum fractal dimension by picture analyzing, and is reflected in real time on the control interface, can observe the state of alumen ustum online.When catching image, because the unevenness that alumina blossom particles distributes in the viewfinder, the detected value random fluctuation is for eliminating the influence of accidentalia, to 5 minutes 60 FRACTAL DIMENSION numerical value D
fWith fractal dimension desired value D
0Compare, as the D that detects
fWith D
0Difference when fluctuating within the specific limits, that is:, be the stable operation that guarantees system, then needn't adjust the size of dosage, P
2=0, the dosage of coagulant is P
1
When, FDA system start-up model is controlled, and determines the adjustment amount P of coagulant
2And the coagulant charging quantity P definite according to raw water flow
1With the coagulant adjustment amount P that determines according to the alumen ustum fractal dimension
2, determine final coagulant charging quantity P, P=P
1+ P
2, export the adding amount of regulating volume pump with the form of control signal.
The advantage of FDA of the present invention system:
1, the FDA system has adopted the alumen ustum structure and the morphological feature parameter-fractal dimension that can reflect flocculating degree and treatment effect preferably to carry out the automatic control and the adjusting of coagulant charging quantity as main contral parameter.
Traditional coagulation theory is on the basis of classical colloidal chemistry, supposes that colloidal particle is spherical foundation, but alumina blossom particles different in the reality be not spheroid, and the structural form of alumen ustum is the key factor of decision coagulation degree and treatment effect.The FDA system is according to fractal theory, by fractal tectonic analysis, calculate the fractal dimension of alumen ustum, reflect the random degree of irregular alumen ustum with this, for seeming complex-shaped and irregular alumen ustum formation, these provide a kind of mathematical framework, provide quantitative description, thereby more can reflect the real structure feature of alumen ustum exactly, and the coagulation administration treatment effect.
2, the coagulation administration control system is a kind of non-linear, the control system of large time delay, FDA system adopt the model control of neural network, self study that it is stronger and adaptive ability, can realize prediction, thereby more traditional control mode shows remarkable advantages to coagulant charging quantity.
3, the FDA system feedforward ratio of introducing the former water water yield adds control, thereby the instantaneous variation that can adapt to the water yield, shorten the adjusting time, and the dosage of coagulant is controlled in the scope of fine tune, improved the stability of system's operation and saved dosage.
4, the FDA system carries out the correction of fractal dimension desired value from two aspects, become controlled variable and turbidity feedback regulation parameter when promptly introducing flow respectively, thereby can reflect the variation of goal-setting value under the technology service condition more accurately and rapidly, to realize more effective dosage control.
5, the FDA system also provides the analyzing and processing function of alumen ustum image, except that fractal dimension, also can measure the granule number in the viewfinder area, diameter of equivalent circle and size distribution thereof, thereby describe the feature in many ways of alumen ustum in the coagulation process quantitatively, realized understanding in many ways and grasp the coagulating state.
FDA coagulation administration control system is except that the feature picture and fractal dimension thereof of online demonstration alumen ustum, also in the dispensing control procedure, the variation of raw water flow, settled water turbidity and dosage provides instantaneous value and statistical value and change trend curve, and the Excel chart output of data and the storage of alumen ustum feature picture are provided.
Claims (7)
1, a kind of coagulation administration opertaing device, comprise video camera device, coagulant dosage device and the processor of catching the alumen ustum feature image, the video camera device is connected with processor respectively with the coagulant dosage device, it is characterized in that video camera device seizure alumen ustum feature image, and the alumen ustum feature image is flowed to processor; Processor calculates the branch dimension D of alumen ustum
f, and according to the dosage P of coagulant and the branch dimension D of alumen ustum
fBetween corresponding relation P=F (D
f), determine coagulant charging quantity P, the instruction with coagulant charging quantity P at last flows to the coagulant dosage device; The coagulant dosage device receives the instruction of dosage P, dosing coagulant in reaction tank.
2, coagulation administration opertaing device according to claim 1 is characterized in that also comprising the flowmeter that is connected with processor, and flowmeter is measured former water water yield Q earlier, and former water water yield Q is flowed to processor; Processor is determined coagulant plan dosage P according to the corresponding relation P=F (Q) between coagulant charging quantity P and the former water water yield Q
1
3, coagulation administration opertaing device according to claim 2 is characterized in that also comprising the turbidity detector that is connected with processor, and the turbidity detector is measured the turbidity T of heavy back water, and the turbidity T of water flows to processor after will sinking; Processor is according to the target turbidity T of heavy back water
0, the branch dimension desired value D of feedback regulation alumen ustum
0
4, coagulation administration opertaing device according to claim 3 is characterized in that described coagulation administration opertaing device has adopted the alumen ustum structure and the morphological feature parameter-fractal dimension that can reflect flocculating degree and treatment effect preferably to carry out the automatic control and the adjusting of coagulant charging quantity as main contral parameter.
5, coagulation administration opertaing device according to claim 3 is characterized in that described coagulation administration opertaing device is a kind of non-linear, and the control system of large time delay, FDA system adopt the model control of neural network.
6, coagulation administration opertaing device according to claim 3 is characterized in that described coagulation administration opertaing device introduces the feedforward ratio of the former water water yield and add control.
7, coagulation administration opertaing device according to claim 3 is characterized in that described coagulation administration opertaing device carries out the correction of fractal dimension desired value from two aspects, becomes controlled variable and turbidity feedback regulation parameter when promptly introducing flow respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620054363 CN200950228Y (en) | 2006-01-27 | 2006-01-27 | Equipment for controlling coagulant dosage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620054363 CN200950228Y (en) | 2006-01-27 | 2006-01-27 | Equipment for controlling coagulant dosage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200950228Y true CN200950228Y (en) | 2007-09-19 |
Family
ID=38892770
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|---|---|---|---|
| CN 200620054363 Expired - Lifetime CN200950228Y (en) | 2006-01-27 | 2006-01-27 | Equipment for controlling coagulant dosage |
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| CN (1) | CN200950228Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385315A (en) * | 2011-09-01 | 2012-03-21 | 深圳市开天源自动化工程有限公司 | Intelligent coagulation chemical dosing control system for water plant and control method thereof |
| CN103708592A (en) * | 2013-12-23 | 2014-04-09 | 华东交通大学 | Novel water treatment method based on machine vision and device thereof |
| CN108975553A (en) * | 2018-08-03 | 2018-12-11 | 华电电力科学研究院有限公司 | A kind of thermal power plant's coal-contained wastewater processing coagulant charging quantity accuracy control method |
| CN111966053A (en) * | 2020-07-09 | 2020-11-20 | 上海威派格智慧水务股份有限公司 | Intelligent flocculant decision making system |
| CN112441654A (en) * | 2020-11-02 | 2021-03-05 | 广州晋合水处理设备有限公司 | Control system and method suitable for coagulating sedimentation |
| CN112456621A (en) * | 2020-11-24 | 2021-03-09 | 四川齐力绿源水处理科技有限公司 | Intelligent flocculation dosing control system and control method |
| CN113705898A (en) * | 2021-08-30 | 2021-11-26 | 上海昊沧系统控制技术有限责任公司 | Method and system for predicting dosage of tap water coagulant |
-
2006
- 2006-01-27 CN CN 200620054363 patent/CN200950228Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385315A (en) * | 2011-09-01 | 2012-03-21 | 深圳市开天源自动化工程有限公司 | Intelligent coagulation chemical dosing control system for water plant and control method thereof |
| CN102385315B (en) * | 2011-09-01 | 2013-05-01 | 深圳市开天源自动化工程有限公司 | Intelligent coagulation chemical dosing control system for water plant and control method thereof |
| CN103708592A (en) * | 2013-12-23 | 2014-04-09 | 华东交通大学 | Novel water treatment method based on machine vision and device thereof |
| CN108975553A (en) * | 2018-08-03 | 2018-12-11 | 华电电力科学研究院有限公司 | A kind of thermal power plant's coal-contained wastewater processing coagulant charging quantity accuracy control method |
| CN111966053A (en) * | 2020-07-09 | 2020-11-20 | 上海威派格智慧水务股份有限公司 | Intelligent flocculant decision making system |
| CN112441654A (en) * | 2020-11-02 | 2021-03-05 | 广州晋合水处理设备有限公司 | Control system and method suitable for coagulating sedimentation |
| CN112456621A (en) * | 2020-11-24 | 2021-03-09 | 四川齐力绿源水处理科技有限公司 | Intelligent flocculation dosing control system and control method |
| CN113705898A (en) * | 2021-08-30 | 2021-11-26 | 上海昊沧系统控制技术有限责任公司 | Method and system for predicting dosage of tap water coagulant |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wan Ruyi Inventor after: Wu Jiang Inventor after: Luo Jiahong Inventor after: Ye Debin Inventor after: Xing Minli Inventor after: Li Zhengguo Inventor after: Lu Hongjia Inventor before: Wan Ruyi Inventor before: Wu Jiang Inventor before: Luo Jiahong Inventor before: Ye Debin Inventor before: Xin Minli Inventor before: Li Zhengguo Inventor before: Lu Hongjia |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WAN RUYI WU JIANG LUO JIAHONG YE DEBIN XIN MINLI LI ZHENGGUO LU HONGJIA TO: WAN RUYI WU JIANG LUO JIAHONG YE DEBIN XING MINLI LI ZHENGGUO LU HONGJIA |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070919 |
|
| EXPY | Termination of patent right or utility model |