CN207703712U - COD on-line detector in a kind of water quality - Google Patents
COD on-line detector in a kind of water quality Download PDFInfo
- Publication number
- CN207703712U CN207703712U CN201721666806.XU CN201721666806U CN207703712U CN 207703712 U CN207703712 U CN 207703712U CN 201721666806 U CN201721666806 U CN 201721666806U CN 207703712 U CN207703712 U CN 207703712U
- Authority
- CN
- China
- Prior art keywords
- cod
- reaction tank
- electrode
- water
- partition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The utility model discloses COD on-line detectors in a kind of water quality, belong to water quality detection equipment technical field.The present apparatus is made of reaction tank, electrode group and lighting module；The electrode group is including a semi-conducting electrode and one to electrode；Two electrodes are placed in the reaction tank, and are linked to be circuit；One side of the reaction tank is equipped with optical transmission window, makes the light that the lighting module is sent out that can put into and be radiated on the semi-conducting electrode；Water sample to be measured flows into the reaction tank and submerges the electrode group, and the electrode reaction of oxidation organic pollution occurs under illumination and generates electric signal, detects the electric signal to correspond to the COD value of water sample, realizes the real-time detection of water-quality COD.
Description
Technical field
The utility model is related to COD on-line detectors in a kind of water quality, belong to water quality inspection technique field.
Background technology
Water security is concerning life and health, and monitoring water quality is the key problem for ensureing water safety.The chemical oxygen demand of water body
Amount (COD) is an important indicator for evaluating the contaminated degree of water body, is one of the core parameter in Water Quality Evaluation,
Timely and accurately the COD value of monitoring water body is of great significance.
In the prior art, water-quality COD index still relies primarily on chemical titration and is measured, including is used for drinking water quality
Both national standard methods of the Permanganate Index Method and potassium dichromate oxidation of calibrating.Such method is cumbersome, analysis time
It is difficult that long, batch measures, and there are serious secondary pollutions, it is difficult to meet the detection demand of various water bodies quality.
It is feasible program to be detected to water-quality COD using the photoelectrochemistrpool pool built based on semi-conducting electrode, under illumination,
Semi-conducting electrode generates high energy hydroxyl radical free radical (OH), and oxidability is extremely strong, may participate in the electricity of Organic Pollutants In Water
Pole oxidation reaction.Based on this, can be achieved to detect the real-time online of COD value by the electric signal monitoring of photoelectrochemistrpool pool.It utilizes
The advantage that the water quality sensor of electrical signal detection has quick response, is easily integrated.For the difficulty for overcoming COD real-time onlines to detect
Topic considers practical situations using the principle, and it is to release feasible production to design convenient applicable water body COD real-time detection apparatus
The key of product achievement.
Invention content
To solve the above problems, the utility model discloses a kind of COD on-line checkings of optical electro-chemistry sensing
Instrument.Used technical solution is：
COD on-line detector in a kind of water quality, the present apparatus includes reaction tank, electrode group and lighting module；It is described
Electrode group is including a semi-conducting electrode and one to electrode；Two electrodes are placed in the reaction tank, and are linked to be circuit；Institute
A side for stating reaction tank is equipped with optical transmission window, makes the light that the lighting module is sent out that can put into and be radiated at described partly to lead
On body electrode.
Water sample to be measured flows into the reaction tank and submerges the electrode group, and the electricity of oxidation organic pollution occurs under illumination
Electric signal is reacted and generated in pole, detects the electric signal to correspond to the COD value of water sample.Faradic currents reflection electrode such as electrode is anti-
Answer situation；The nonfaradaic current that interfacial electric double layer is formed under electric field action reflects electrode surface attachment characteristic；By simulating electricity
The analysis method on road obtains multiple measurement data such as solution conductivity, interface capacitance simultaneously；And illumination, to many conditions such as electric control
Means of testing get back more rich data, there are correspondences with organic pollution concentration for each signal.
Further, the upper end of the side of the reaction tank is equipped with water inlet, and is provided inwardly with first partition, and described first
The lower end of partition board is equipped with trepanning；The lower end of the opposite other side of reaction tank is equipped with water outlet, and is provided inwardly with second partition, described
The height of second partition is less than reaction tank periphery.
The reaction tank is divided into water buffering area, reaction zone, catchment by the first partition with the second partition；
Water sample flows into buffering area from water inlet, then to be detected from the bottom of first partition inflow reaction zone, keeps waterflow stabilization；It has more
Water sample is spilt into catchment by second partition and is discharged from discharge outlet, to keep the water for participating in reaction constant.
Further, the Ti net electrodes of the semi-conductor electricity extremely area load TiO2 film of Nano tube array.Described
Semi-conducting electrode is matrix by ti-alloy mesh, by the Anodic Oxidation of electrolyte containing F, in Surface Creation TiO2Nano-tube array
Film layer, then it is changed into crystalline state through high temperature sintering.TiO2Nano-tube array film layer stabilization, nontoxic, opto-electronic conversion strong to light absorption
Efficiency and charge mobility are high, and generated hydroxyl radical free radical oxidability is extremely strong, easily aoxidizes organic pollution.
Further, described is the Ti net electrodes of area load Pt to electrode；It is described to electrode and the semi-conducting electrode
It is parallel and place vertically.Because electrode occurring the reduction reaction of H2, Pt has lower overpotential of hydrogen evolution, keeps reduction reaction high
Effect carry out, avoid electronics can not effective mobility to limit the progress of semi-conducting electrode oxidation reaction.
Further, the lighting module includes ultraviolet lamp, and the emission wavelength of the ultraviolet lamp is less than 380nm.
Further, the lighting module includes prefocus cup, and the prefocus cup is shining into anti-after converging ultraviolet lamp wiring
Ying Chizhong front illuminateds are on the semi-conducting electrode.
Further, the optical transmission window of the reaction tank is silica glass window.
Compared with prior art, COD on-line detector is applicable to various water quality in the water quality of the utility model
The real-time detection of COD in analysis.By building efficient photoelectrochemistrpool pool measure loop, as long as the anti-raw reaction of organic pollution,
It will generate corresponding electric charge transfer, and generate faradic currents.To the detection of Weak current without technology barrier, therefore this dress
The COD detection demands of degree of precision can be met by setting.
In addition, special reaction tank design ensure that the stabilization of water environment and sustainable progress, avoid making electric signal
At violent disturbance, accuracy of detection is influenced；The online lasting detection of flow can be realized simultaneously.
COD on-line detector stability height, high sensitivity, realization are online real-time in the water quality of the utility model
The high-precision of water-quality COD is examined and determine, and has splendid application value.
Description of the drawings
Fig. 1 is a kind of positive structure schematic of COD on-line detector in water quality in the utility model；
Fig. 2 is a kind of side structure schematic diagram of COD on-line detector in water quality in the utility model.
Specific implementation mode
COD in the water quality based on optical electro-chemistry sensing in the utility model is examined online below in conjunction with attached drawing
Instrument is surveyed to be described further：
The positive structure schematic of COD on-line detector as shown in Figure 1, the device by reaction tank (1),
Electrode group and lighting module composition；Electrode group includes to electrode (2) and semi-conducting electrode (3), and parallel vertical is placed on instead
In Ying Chi (1) and it is linked to be circuit；One side of reaction tank is equipped with the optical transmission window being made of quartz glass plate (4)；Illumination mould
Block includes a ultraviolet lamp (6) and a prefocus cup (5), and the emission wavelength of ultraviolet lamp (6) is less than 380nm；Prefocus cup (5) is by light
After the congruence is poly- through quartz glass plate (4) front illuminated on semi-conducting electrode (3).
To the Ti net electrodes that electrode (2) is area load Pt, by the way that Ti nets are placed in catholyte in chloroplatinic acid aqueous solution
Deposition Pt is prepared.
Semi-conducting electrode (3) is the Ti net electrodes of area load TiO2 film of Nano tube array, using ti-alloy mesh as matrix,
By in the Anodic Oxidation of electrolyte containing F, being changed into crystallization in Surface Creation TiO2 nano-tube array film layers, then through high temperature sintering
Thus state is prepared.
As shown in the side structure schematic diagram of device in Fig. 2, the right side upper end of reaction tank (1) is equipped with water inlet (1d), and
It is provided inwardly with first partition (1c), the lower end of first partition (1c) is equipped with trepanning.The left side lower end of reaction tank (1) is equipped with water outlet
(1a), and it is provided inwardly with second partition (1b), the height of second partition is less than the periphery of reaction tank (1).First partition (1b) with
Reaction tank (1) is divided into water buffering area, reaction zone, catchment by second partition (1c).
Water sample to be measured is flowed into buffering area from water inlet by water pump periodical feeding, then is flowed into from the bottom first partition (1c)
Reaction zone is to be detected；The water sample having more is spilt into catchment by second partition (1b) and is discharged from discharge outlet (1a), to keep joining
It is constant with the water reacted.
Illumination lower semiconductor electrode (3) generates electron-hole pair, and photohole migrates to electrode surface and generates high energy hydroxyl
And organic pollution is aoxidized, light induced electron, which is transferred to, to be participated in the reduction reaction of H2 to electrode (2) and generates electric current, and the electric current is detected
Value, there are correspondences with the COD value of water sample.
Electric current carries out processing by I/V conversion circuits and four bandpass filter of low order and reduces noise jamming；The electricity of gained
Signal is transported to microcontroller STM32, and digital signal is converted to by A/D, and host computer is sent to by serial ports or USB, realizes
Data display and save.
Before practical test sample, first prepares the standard analog solution of COD value known to one group and be detected using the device, obtained
The correspondence of COD value and current value is obtained to make standard curve.When test sample, sample to be tested kinetic current value is detected, compares mark
Directrix curve can be obtained water sample COD testing results.
Above description is specific embodiment of the present utility model, each to illustrate not in the essence of the utility model
Appearance is construed as limiting.
Claims (8)
1. COD on-line detector in a kind of water quality, which is characterized in that including reaction tank, electrode group and lighting module；
The electrode group is including a semi-conducting electrode and one to electrode；Two electrodes are placed in the reaction tank, and even
At circuit；
The reaction tank, one side are equipped with optical transmission window, make the light that the lighting module is sent out that can put into and be radiated at
On the semi-conducting electrode；
Water sample to be measured flows into the reaction tank and submerges the electrode group, and the electrode that oxidation organic pollution occurs under illumination is anti-
Electric signal should and be generated, detects the electric signal to correspond to the COD value of water sample.
2. COD on-line detector as described in claim 1, which is characterized in that the upper end of the side of the reaction tank
Equipped with water inlet, and it is provided inwardly with first partition, the lower end of the first partition is equipped with trepanning；The opposite other side of reaction tank
Lower end is equipped with water outlet, and is provided inwardly with second partition, and the height of the second partition is less than reaction tank periphery；
The reaction tank is divided into water buffering area, reaction zone, catchment by the first partition with second partition；Water sample from into
The mouth of a river flows into buffering area, then to be detected from the bottom of first partition inflow reaction zone, keeps waterflow stabilization；The water sample having more is by
Two partition boards spill into catchment and are discharged from discharge outlet, keep the water for participating in reaction.
3. COD on-line detector as claimed in claim 1 or 2, which is characterized in that the semi-conductor electricity is extremely
The Ti net electrodes of area load TiO2 film of Nano tube array.
4. COD on-line detector as claimed in claim 3, which is characterized in that the Ti net electrodes, mesh number
For 80-100 mesh.
5. COD on-line detector as claimed in claim 3, which is characterized in that described is area load Pt to electrode
Ti net electrodes；It is described parallel with the semi-conducting electrode to electrode and place vertically.
6. COD on-line detector as described in claim 4 or 5, which is characterized in that the lighting module includes
The emission wavelength of ultraviolet lamp, the ultraviolet lamp is less than 380nm.
7. COD on-line detector as claimed in claim 6, which is characterized in that the lighting module further includes gathering
Light cup, the prefocus cup will the ultraviolet lamp light converge after be shining into reaction tank front illuminated in the semi-conducting electrode
On.
8. COD on-line detector as claimed in claim 6, which is characterized in that the optical transmission window of the reaction tank is
Silica glass window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721666806.XU CN207703712U (en) | 2017-12-05 | 2017-12-05 | COD on-line detector in a kind of water quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721666806.XU CN207703712U (en) | 2017-12-05 | 2017-12-05 | COD on-line detector in a kind of water quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207703712U true CN207703712U (en) | 2018-08-07 |
Family
ID=63024814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721666806.XU Active CN207703712U (en) | 2017-12-05 | 2017-12-05 | COD on-line detector in a kind of water quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207703712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941731A (en) * | 2017-12-05 | 2018-04-20 | 海南聚能科技创新研究院有限公司 | COD on-line detector in a kind of water quality |
-
2017
- 2017-12-05 CN CN201721666806.XU patent/CN207703712U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941731A (en) * | 2017-12-05 | 2018-04-20 | 海南聚能科技创新研究院有限公司 | COD on-line detector in a kind of water quality |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100585392C (en) | Silk screen printing electrode and producing process, and sensor and detecting method | |
| CN102495119A (en) | Multi-parameter water quality monitoring integrated microarray electrodes and preparation method | |
| CN101788522B (en) | Chemical oxygen demand (COD) on-line monitoring device and method based on boron-doped diamond membrane electrode | |
| CN102798657B (en) | Site fast detection method for copper, zinc, lead and cadmium as heavy metals in seawater | |
| CN104697917B (en) | The impedance bioelectrical measurement system anomaly detection method and system combined based on multiple features | |
| CN101694471A (en) | Drinking water COD online automatic detection method and detection instrument | |
| CN106841334A (en) | It is a kind of can real time on-line monitoring contents of many kinds of heavy metal ion detecting system and method | |
| CN110057396B (en) | Continuous monitoring system and early warning method for volatile organic compounds in soil and underground water | |
| CN210401311U (en) | Portable COD detector | |
| CN107576716A (en) | A kind of acupuncture needle base working electrode electrochemical sensor for detecting trace heavy metal | |
| CN107576704A (en) | Microcysin LR molecular engram optical electro-chemistry sensor and its preparation and application | |
| CN107941731A (en) | COD on-line detector in a kind of water quality | |
| CN207703712U (en) | COD on-line detector in a kind of water quality | |
| CN111398549A (en) | Reagent-free multi-parameter water quality in-situ monitor | |
| CN101028573A (en) | Water conductivity monitoring circuit for use with a steam generator | |
| CN103575794B (en) | Detecting method of iodide ions based on graphene/DNA (Deoxyribonucleic Acid)/sliver nano composite material | |
| CN109916983B (en) | Three-electrode system, electrochemical sensor and preparation method thereof, electrochemical workstation and application thereof | |
| CN206684096U (en) | It is a kind of can real time on-line monitoring contents of many kinds of heavy metal ion detecting system | |
| CN100429500C (en) | Method for detecting chemical oxygen demand of water body | |
| CN201497706U (en) | COD on-line automatic detector for drinking water | |
| CN206096028U (en) | Micro -fluidic displaceable cavity structures's self calibration ocean multi -parameter chemical sensor | |
| CN105510423A (en) | Automatic on-line monitor for measuring water body COD (chemical oxygen demand) | |
| CN113155231A (en) | Monitoring method and monitoring device for increasing amount of sediment level of black and odorous water body | |
| CN103402327B (en) | A kind of manufacture method printed electrode for Portable heavy metal detection | |
| Yin et al. | A batch microfabrication of a microfluidic electrochemical sensor for rapid chemical oxygen demand measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |