CN103645388A - Online streaming potential measuring instrument - Google Patents
Online streaming potential measuring instrument Download PDFInfo
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- CN103645388A CN103645388A CN201310636860.XA CN201310636860A CN103645388A CN 103645388 A CN103645388 A CN 103645388A CN 201310636860 A CN201310636860 A CN 201310636860A CN 103645388 A CN103645388 A CN 103645388A
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Abstract
The invention provides an online streaming potential measuring instrument which comprises the following aspects: (1) online measurement determining: in order to realize online measurement sampling water continuously flows through a probe of a measuring device (sensor), new sampling water constantly replaces old sampling water, and a detection signal of the measuring instrument is ensured to always track change of residual charge in measured water, namely, the effect of flocculating agent adding; and (2) accurate residual charge measurement: work is done on charge according to the principle of electromotive force in the theory of electronics to enable the charge to directionally move between two electrodes, the two electrodes generate voltage, and in order to detect residual charge in the measured water, a detection device (probe) needs to drive the measured water to continuously move between the two electrodes, the residual charge in the water correspondingly moves to form current, and the current flows through the two electrodes to generate potential, which is called streaming potential in the invention. The device of the invention is called an online streaming potential measuring instrument. The instrument provided by the invention can be adopted to realize online detection and optimal control on flocculating agent adding.
Description
Technical field
The present invention relates to a kind of online measuring technique, relate in particular to a kind of streaming potential on-line measurement instrument, in real time the residual charge in detection ring water conservation.This technology can be applied in environment-protective water and process, and comprises water treatment, wastewater treatment, and generating papermaking, weaving, printing and dyeing, oil, food, the industry such as pharmacy, realize flocculant concentration and detect online and optimum control.
Background technology
Theoretical according to flocculation, in environment-protective water processing procedure by add flocculating agent make water in suspended particles precipitate.Reaction mechanism is as follows:
Suspended particles in environment-protective water, with negative charge, because same sex electric charge repels each other, cannot precipitate suspended particles voluntarily.In environment-protective water processing procedure, need to add flocculating agent with positive charge go in and the negative charge of suspended particles, make suspended particles be electric neutrality state.Universal gravitation is by the suspended particles of electric neutrality state flock together (flocculation).When the weight of the suspended particles (flocculated colloid) of assembling surpasses its floating force, flocculated colloid starts precipitation, reaches the purification object of water treatment.
Above reaction mechanism shows, it is as follows that the dosage of flocculating agent directly affects the treatment effect of water:
1. the flocculating agent amount of owing adds: the positive charge that flocculating agent brings be less than suspended particles in water with negative charge, after neutralization, negative charge is superfluous.The repulsive force of residual negative electric charge has negative function to universal gravitation, flocculating effect variation, and precipitation is not exclusively.
2. flocculating agent excess adds: the positive charge that flocculating agent brings more than suspended particles in water with negative charge, neutralization after positive excess.The repulsive force of residue positive charge has negative function to universal gravitation, flocculating effect variation, and precipitation is not exclusively.
3. flocculating agent optimum adds: the positive charge equivalent that flocculating agent brings in water suspended particles with negative charge, neutralization after suspended particles be electric neutrality state.Universal gravitation effect is maximum, and flocculating effect is best, and sedimentation effect is best.
Flocculant concentration is the bottleneck of water treatment, directly affects the treatment effect of water.
Summary of the invention
1, technical matters to be solved
In order to measure in real time flocculant concentration effect, need to design a kind of on-line measurement device, detect in real time the residual charge in water after flocculant concentration.The measuring-signal of this device (positive-negative polarity and the amplitude that comprise signal), directly reflects flocculant concentration effect, as follows:
(1) when detection signal is greater than zero, show positive excess in tested water, flocculating agent excess adds.
(2) when detection signal is less than zero, show that in tested water, negative charge is superfluous, the flocculating agent amount of owing adds.
(3) when detection signal equals zero, show that in tested water, residual charge is zero, flocculating agent optimum adds.
Flocculant concentration curve is shown in Fig. 1.
2, technical scheme
In order to overcome the above problems, the invention provides a kind of streaming potential on-line measurement instrument, comprising:
(1) determining of in real time/on-line measurement:
In order to realize real-time measurement, need sample water continuous stream to cross measurement mechanism (sensor) probe, new sample water ceaselessly replaces old sample water, guarantees that the detection signal of this measurement mechanism follows the tracks of the variation of residual charge in tested water always---flocculating agent add effect.
(2) residual charge Measurement accuracy:
According to the electromotive force principle in theory of electronics: to electric charge acting, make its displacement in two electrodes, two point poles produce voltages.
In order to detect the residual charge in tested water, the tested water of pick-up unit (probe) demand motive continuous moving between two electrodes, the residual charge in water is also done corresponding movement.Electric charge moves formation electric current, and electric current flows through two electrodes and produces current potential, is called in the present invention streaming potential, and apparatus of the present invention are called streaming potential on-line measurement instrument, refers to figure bis-(surveying instrument schematic diagram).
3, beneficial effect:
Instrument provided by the invention can be realized the online detection of flocculant concentration and optimum control.
accompanying drawing explanation
Fig. 1 flocculant concentration curve
Fig. 2 surveying instrument schematic diagram
Fig. 3 streaming potential surveying instrument design (cut-open view)
34. direct current generators; 28. rotors; 16. light sensation devices; 30. semicircle metal parts; 29. cams; 32. connect hinge; 54,50,38. probe retaining parts; Probe water delivering orifice; On 20. electrodes; Under 22. electrodes; 52. measuring chambers; 40. lower pistons; 18. upper pistons; 64. bases; 46,48. electrode cables; 36. signal processing units; 14. probe water inlets; 44. light sensation device wires.
Embodiment
Below the present invention is described in detail.
1. streaming potential on-line measurement Instrument Design
(1) signal measurement part
Figure tri-is complete design of streaming potential on-line measurement instrument: tested water is imported into surveying instrument by sampling from entrance 14 and pops one's head in, and from probe outlet 10, discharges.In the space of probe measurement chamber 52,42 are full of tested water.The tested water moving up and down in driving measuring chamber of lower piston 40 is done corresponding lower upper movement, and the residual charge in tested water is lower mobile along with doing, generation current.When electric current flows through two electrodes (20,22), produce current potential (streaming potential).This streaming potential is delivered to signal processing unit 36 by wire (46,48), and the original signal that this signal processing unit produces streaming potential on-line measurement instrument is converted to the industrial signal of standard, 4-20 milliampere, 4-5 volt.
(2) gear train part
Parts in figure tri-: 34,28,29,32,18th, Mechanical Driven-gear train, drive lower piston reciprocally to move up and down continuously, direct current generator 34 drives its rotor 28 by rotating continuously with certain rotating speed clockwise, and by cam 29, and hinge 32 drags the motion continuously up and down of upper piston 18 dos, moving up and down of upper piston drives moving up and down of lower piston, and upper piston and lower piston are threaded connection.
(3) probe mount
The base 64 of probe measurement chamber 52 is used for sealing measuring chamber, stops tested water to flow out from measuring chamber bottom.
(4) probe retaining parts
(5) the light sensation parts 16 acquisition electric signal that combines with semi-circular features 30, processes for signal, and 44 is connection wire.
Claims (6)
1. the present invention relates to a kind of online measuring technique, relate in particular to a kind of streaming potential on-line measurement instrument, comprise following aspect: one, in real time/on-line measurement determines, in order to realize real-time measurement, need sample water continuous stream to cross measurement mechanism probe, new sample water ceaselessly replaces old sample water, guarantees that the detection signal of this measurement mechanism follows the tracks of the variation of residual charge in tested water always---flocculating agent add effect; Two, residual charge Measurement accuracy, according to the electromotive force principle in theory of electronics: electric charge is done work, make its displacement in two electrodes, two point poles produce voltage, in order to detect the residual charge in tested water, the tested water of pick-up unit demand motive continuous moving between two electrodes, residual charge in water is also done corresponding movement, electric charge moves formation electric current, electric current flows through two electrodes and produces current potential, be called in the present invention streaming potential, apparatus of the present invention are called streaming potential on-line measurement instrument.
2. a kind of streaming potential on-line measurement instrument as claimed in claim 1, it is characterized in that: tested water is imported into surveying instrument probe by sampling from entrance (14), from probe outlet (10), discharge, in the space of probe measurement chamber (52), (42) are full of tested water, the tested water driving in measuring chamber that moves up and down of lower piston (40) is done corresponding lower mobile, residual charge in tested water is lower mobile along with doing, generation current, when electric current flows through two electrodes (20), (22) time, produce streaming potential, this streaming potential is by wire (46), (48) be delivered to signal processing unit (36), the original signal that this signal processing unit produces streaming potential on-line measurement instrument is converted to the industrial signal of standard, 4-20 milliampere, 4-5 volt.
3. a kind of streaming potential on-line measurement instrument as described in claim 1-2, it is characterized in that: drive lower piston reciprocally to move up and down continuously, direct current generator (34) drives its rotor (28) by rotating continuously with certain rotating speed clockwise, by cam (29), and hinge (32) drags the motion continuously up and down of upper piston (18) do, moving up and down of upper piston drives moving up and down of lower piston, and upper piston and lower piston are threaded connection.
4. a kind of streaming potential on-line measurement instrument as described in claim 1-3, is characterized in that: the base (64) of probe measurement chamber (52) is used for sealing measuring chamber, stops tested water to flow out from measuring chamber bottom.
5. a kind of streaming potential on-line measurement instrument as described in claim 1-4, is characterized in that: probe retaining parts (54), (50), and (38) are same parts, its effect comprises: the feedwater of probe (14), draining (10); For measuring chamber provides a certain amount of tested water, guarantee measuring chamber stably measured.
6. a kind of streaming potential on-line measurement instrument as described in claim 1-5, is characterized in that: light sensation parts (16) the acquisition electric signal that combines with semi-circular features (30), for signal, process, and (44) are connection wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310636860.XA CN103645388A (en) | 2013-12-03 | 2013-12-03 | Online streaming potential measuring instrument |
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| CN201310636860.XA CN103645388A (en) | 2013-12-03 | 2013-12-03 | Online streaming potential measuring instrument |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958114A (en) * | 2016-01-12 | 2017-07-18 | 青岛海尔洗衣机有限公司 | A kind of control method and washing machine of the washing machine that flocculates |
| CN107032461A (en) * | 2016-02-03 | 2017-08-11 | 青岛海尔洗衣机有限公司 | A kind of service water process control method and its device |
| CN107462781A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential desktop analytical instrument |
| CN107462783A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential on-line measurement instrument |
| CN107462603A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential on-line measurement instrument bypass drainage channel improves |
| CN109521285A (en) * | 2017-09-20 | 2019-03-26 | 南京国能环保工程有限公司 | One kind is based on travelling charge measurement technological system |
| CN111762997A (en) * | 2020-06-30 | 2020-10-13 | 绍兴市城投再生资源有限公司 | Flocculant quantity control method for waste slurry treatment |
| CN118130923A (en) * | 2024-05-07 | 2024-06-04 | 巴倍尔特仪表有限公司 | Current detector for accurate control of coagulation and dosing |
Citations (2)
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|---|---|---|---|---|
| US6107803A (en) * | 1997-10-31 | 2000-08-22 | Wang; Junli | Streaming current sensor |
| CN102879451A (en) * | 2012-09-28 | 2013-01-16 | 无锡旭野科技有限公司 | Multiparameter water quality analyzer |
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2013
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Patent Citations (2)
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|---|---|---|---|---|
| US6107803A (en) * | 1997-10-31 | 2000-08-22 | Wang; Junli | Streaming current sensor |
| CN102879451A (en) * | 2012-09-28 | 2013-01-16 | 无锡旭野科技有限公司 | Multiparameter water quality analyzer |
Non-Patent Citations (3)
| Title |
|---|
| JUNLI WANG: "Finding the optimal flocculation with a streaming potential instrument", 《JOURNAL AWWA》 * |
| JUNLI WANG: "Finding the optimal flocculation with a streaming potential instrument", 《JOURNAL AWWA》, 30 November 2001 (2001-11-30), pages 54 - 56 * |
| 王建平: "PLC在水厂加药自动控制系统中的应用", 《科技资讯》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958114A (en) * | 2016-01-12 | 2017-07-18 | 青岛海尔洗衣机有限公司 | A kind of control method and washing machine of the washing machine that flocculates |
| WO2017121325A1 (en) * | 2016-01-12 | 2017-07-20 | 青岛海尔洗衣机有限公司 | Method for controlling flocculation washing machine, and washing machine |
| CN107032461A (en) * | 2016-02-03 | 2017-08-11 | 青岛海尔洗衣机有限公司 | A kind of service water process control method and its device |
| CN107462781A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential desktop analytical instrument |
| CN107462783A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential on-line measurement instrument |
| CN107462603A (en) * | 2016-06-02 | 2017-12-12 | 镇江腾龙智能科技有限公司 | Streaming potential on-line measurement instrument bypass drainage channel improves |
| CN109521285A (en) * | 2017-09-20 | 2019-03-26 | 南京国能环保工程有限公司 | One kind is based on travelling charge measurement technological system |
| CN111762997A (en) * | 2020-06-30 | 2020-10-13 | 绍兴市城投再生资源有限公司 | Flocculant quantity control method for waste slurry treatment |
| CN118130923A (en) * | 2024-05-07 | 2024-06-04 | 巴倍尔特仪表有限公司 | Current detector for accurate control of coagulation and dosing |
| CN118130923B (en) * | 2024-05-07 | 2024-07-12 | 巴倍尔特仪表有限公司 | Current detector for accurate control of coagulation and dosing |
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Application publication date: 20140319 |