CN106226257A - COD on-Line Monitor Device and monitoring method thereof in a kind of water - Google Patents
COD on-Line Monitor Device and monitoring method thereof in a kind of water Download PDFInfo
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- CN106226257A CN106226257A CN201610544995.7A CN201610544995A CN106226257A CN 106226257 A CN106226257 A CN 106226257A CN 201610544995 A CN201610544995 A CN 201610544995A CN 106226257 A CN106226257 A CN 106226257A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000012544 monitoring process Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 18
- 239000000523 sample Substances 0.000 claims abstract description 59
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 18
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 230000003595 spectral effect Effects 0.000 claims abstract description 8
- 238000002835 absorbance Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000013178 mathematical model Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical group [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- DOBUSJIVSSJEDA-UHFFFAOYSA-L 1,3-dioxa-2$l^{6}-thia-4-mercuracyclobutane 2,2-dioxide Chemical compound [Hg+2].[O-]S([O-])(=O)=O DOBUSJIVSSJEDA-UHFFFAOYSA-L 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000876446 Lanthanotidae Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910000372 mercury(II) sulfate Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3155—Measuring in two spectral ranges, e.g. UV and visible
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention relates to COD on-Line Monitor Device in a kind of water, including gauge outfit and probe two parts, wherein gauge outfit includes display module, data processing module and control module;Wherein probe segment includes: light source module, lens, flow cell module, spectrometer module, described light source module, lens, flow cell module, spectrometer module are by order arrangement the most successively, probe is immersed in water sample to be measured by this device, by the xenon source full spectral measurement to water sample to be measured in probe, utilize grating, spectrogrph, detector etc., optical signal is changed into the signal of telecommunication, calculates the concentration of COD in water sample to be measured finally according to the water quality model built up.Reliability of the present invention is high, the suitability strong, low cost, pollution-free.
Description
Technical field
The present invention is applied to the monitoring fields such as surface water, subsoil water, waste water, and the lowest COD high-chloride wastewater is monitored, and relates to
COD on-Line Monitor Device and monitoring method thereof in a kind of water.
Background technology
COD, as the index of measurement water body organism relative amount, is one of important indicator evaluating degree of water pollution,
Therefore it is a big event of water quality monitoring.Current most of COD on-line monitoring instrument is to use potassium dichromate as oxidation
Agent, aoxidizes water sample under certain condition, is calculated the amount of the oxidant of consumption by photometer, is converted into the value of COD further.
Owing in water sample, partial organic substances is difficult to by potassium dichromate oxidation, and there is chloride ion interference in potassium dichromate method, when chlorine from
When sub-concentration is more than 1000mg/L, need to shelter to resist certain density chloride ion by dilution and addition Mercury bisulfate..Work as chlorine
When ion concentration is more than 10000mg/L, the accuracy of potassium dichromate method is the most unreliable.Therefore, traditional potassium dichromate method
Poor for applicability in the monitoring of high-chloride wastewater, highly basic sewage and surface water.From the point of view of in terms of on the affecting of environment, there is chromium, hydrargyrum
Secondary pollution;From safeguarding, reagent expense and maintenance workload are big.
There is the problems such as poor for applicability, cost is high, poor reliability in method in sum.
Summary of the invention
The invention provides on-line monitoring COD device and monitoring method thereof in a kind of water, probe immersed in water sample to be measured,
By the xenon source full spectral measurement to water sample to be measured in probe, utilize grating, spectrogrph, detector etc., optical signal is turned
The chemical conversion signal of telecommunication, calculates the concentration of COD in water sample to be measured finally according to the water quality model built up.
The present invention is achieved by the following technical solutions: COD on-Line Monitor Device in a kind of water, including gauge outfit and probe
Two parts, wherein table header is divided and is included:
Display module, for showing the COD concentration value of water body to be detected to user;
Data processing module, calculates the concentration of COD in water sample to be measured according to the water quality model built up:
Control module, is used for controlling described data processing module, described display module completes to work accordingly;
Wherein probe segment includes:
Light source module, i.e. xenon source, function is that xenon source sends ultraviolet-visible light under specific high pressure;
Lens;
Flow cell module, the region that water sample to be measured flows through;
Spectrometer module, including grating, detector, on the light of grating beam splitting and reflection 200-800nm wave band to detector,
Then the signal of telecommunication is converted optical signals to by cable transmission in gauge outfit;
Described light source module, lens, flow cell module, spectrometer module are by order arrangement the most successively;
Described grating is arranged on spectrometer module by regulation screw, and described detector is arranged on described spectrometer module
Lower half, front end.
Further, the bottom of described flow cell arranges blow valve port, for automatically cleaning lens.At measurement interval phase instrument
Can automatically clean lens, to prevent foul to be deposited on lens surface, affect the accuracy of monitoring device.
A kind of use the monitoring method of COD on-Line Monitor Device in above-mentioned water, including:
Step one, immerses water sample to be measured by probe, sends ultraviolet-visible light by specific high voltage startup xenon source;
Step 2, this light beam is through the flow cell being full of water sample to be measured;
Step 3, light beam enters spectrometer module, beats after grating beam splitting on array detector;
Step 4, the optical signal being loaded with water sample to be measured absorption information is changed into the signal of telecommunication and sends into data by array detector
Processing unit;
Step 5, data processing unit is quantitative with COD according to using weighting multi-wavelength absorbance detection method to set up absorbance
The water quality model of algorithm, by the change of energy COD concentration value during i.e. absorbance size calculates water sample to be measured;
Further, step one, described xenon source is full spectral measurement to water sample to be measured, between 200nm to 800nm
Wavelength.According to the absorbance of other specific wavelength points in full spectrum and the mathematical model of tie substance, can monitor BOD, SS and
Other water quality index such as colourity.
Further, beat modulating voltage and number of times by regulation xenon source, and the angles and positions of regulation grating, use
Can normally monitor along with the change of water sample operating mode to be measured in meeting monitoring device.
Further, the distance scalable between described spectrometer module and light source, for the monitoring of machine with wide range COD
Demand.
This invention takes above-mentioned corrective measure to carry out, its beneficial effect is notable: probe is immersed water sample to be measured by the present invention
In, by the xenon source full spectral measurement to water sample to be measured in probe, utilize grating, spectrogrph, photoelectric sensor etc., by light
Signal changes into the signal of telecommunication, finally uses weighting multi-wavelength absorbance detection method to set up the water quality model that absorbance is quantitative with COD,
By the change size of energy concentration value of COD during i.e. absorbance calculates water sample, reliability of the present invention is high, the suitability is strong, become
This is low, pollution-free, is particularly well-suited to the monitoring of low COD high-chloride wastewater
Accompanying drawing explanation
Fig. 1 is the structural representation of probe segment of the present invention;
Fig. 2 is the structural representation of spectrometer module of the present invention;
In figure, 1 is light source module, and 2 is lens, and 3 is flow cell module, and 4 is blow valve port, and 5 is spectrometer module, and 6 is light
Grid, 7 is regulation screw, and 8 is detector.
Detailed description of the invention
Below against accompanying drawing, the present invention is further illustrated in conjunction with the embodiments:
With reference to shown in Fig. 1-Fig. 2, COD on-Line Monitor Device in a kind of water, including gauge outfit and probe two parts, gauge outfit is the most aobvious
Showing, process signal of telecommunication part, probe i.e. puts into measurement change in optical signal part in water sample to be measured, and wherein table header is divided and included:
Display module, for showing the COD concentration value of water body to be detected to user;
Data processing module, calculates the concentration of COD in water sample to be measured according to the water quality model built up:
Control module, is used for controlling described data processing module, described display module completes to work accordingly;
Wherein probe segment includes:
Light source module, i.e. xenon source, function is that xenon source sends ultraviolet-visible light under specific high pressure;
Lens;
Flow cell module, the region that water sample to be measured flows through;
Spectrometer module, including grating, detector, on the light of grating beam splitting and reflection 200-800nm wave band to detector,
Then the signal of telecommunication is converted optical signals to by cable transmission in gauge outfit;
Described light source module, lens, flow cell module, spectrometer module are by order arrangement the most successively;
Described grating is arranged on spectrometer module by regulation screw, and described detector is arranged on described spectrometer module
Lower half, front end.Grating angle adjustable, makes light beam to be received by detector to greatest extent.
The monitoring method utilizing above-mentioned monitoring device includes:
Step one, immerses water sample to be measured by probe, sends ultraviolet-visible light by specific high voltage startup xenon source,
Spectral measurement complete to water sample to be measured, described full spectral measurement, for the wavelength between 200nm to 800nm;
Step 2, the above-mentioned light beam sent is through the flow cell being full of water sample to be measured;
Step 3, light beam enters spectrometer module, beats after grating beam splitting on array detector;
Step 4, the optical signal being loaded with water sample to be measured absorption information is changed into the signal of telecommunication and sends into data by array detector
Processing unit;
Step 5, data processing unit is quantitative with COD according to using weighting multi-wavelength absorbance detection method to set up absorbance
The water quality model of algorithm, by the change of energy COD concentration value during i.e. absorbance size calculates water sample to be measured.Weighting multi-wavelength
Detection method, i.e. monitors 5 organic absorption spectrums having the type of representative between 243nm-290nm, selects and the phase relation of COD
The weight coefficient of the optimal each wavelength of number, then by maximum weight coefficient combination, founding mathematical models.
The present invention can beat modulating voltage and number of times by regulation xenon source, and the angles and positions of regulation grating, use
Can normally monitor along with the change of water sample operating mode to be measured in meeting monitoring device.
The present invention can realize the monitoring of machine with wide range COD by regulating the distance between spectrometer module and light source to be needed
Ask.
According to the absorbance of other specific wavelength points in full spectrum and the mathematical model of tie substance, can monitor BOD, SS and
Other water quality index such as colourity.
Light source module in present invention probe sends ultraviolet-visible light by specific high voltage startup xenon source, passes through
Being full of the flow cell of water sample to be measured, light beam enters spectrometer module subsequently, beats after grating beam splitting on array detector, should
Array detector absorbs the data process mould that the optical signal of information changes in signal of telecommunication send being loaded with water sample to be measured into gauge outfit
Block, according to the water quality model using weighting multi-wavelength absorbance detection method to set up absorbance and COD Quantitative algorithm, by energy
Change COD concentration value during i.e. absorbance size calculates water sample to be measured.
The listed above specific embodiment being only the present invention, it is clear that the invention is not restricted to above example, this area
All deformation that those of ordinary skill can directly derive from present disclosure or associate, all should belong to the guarantor of the present invention
Protect scope.
Claims (7)
1. a COD on-Line Monitor Device in water, including gauge outfit and probe two parts, it is characterised in that wherein table header subpackage
Include:
Display module, for showing the COD concentration value of water body to be detected to user;
Data processing module, calculates the concentration of COD in water sample to be measured according to the water quality model built up:
Control module, is used for controlling described data processing module, described display module completes to work accordingly;
Wherein probe segment includes:
Light source module, i.e. xenon source, function is that xenon source sends ultraviolet-visible light under specific high pressure;
Lens;
Flow cell module, the region that water sample to be measured flows through;
Spectrometer module, including grating, detector, on the light of grating beam splitting and reflection 200-800nm wave band to detector, then
Convert optical signals to the signal of telecommunication by cable transmission in gauge outfit;
Described light source module, lens, flow cell module, spectrometer module are by order arrangement the most successively;
Described grating is arranged on spectrometer module, before described detector is arranged on described spectrometer module by regulation screw
End lower half.
COD on-Line Monitor Device in a kind of water the most according to claim 1, it is characterised in that the bottom of described flow cell
Blow valve port is set, for automatically cleaning lens.
3. the monitoring method of COD on-Line Monitor Device in the water using described in claim 1 or 2, it is characterised in that bag
Include:
Step one, immerses water sample to be measured by probe, sends ultraviolet-visible light by specific high voltage startup xenon source;
Step 2, this light beam is through the flow cell being full of water sample to be measured;
Step 3, light beam enters spectrometer module, beats after grating beam splitting on array detector;
Step 4, the optical signal being loaded with water sample to be measured absorption information is changed into the signal of telecommunication and sends into data process by array detector
Unit;
Step 5, data processing unit sets up absorbance and COD Quantitative algorithm according to employing weighting multi-wavelength absorbance detection method
Water quality model, by the change of energy COD concentration value during i.e. absorbance size calculates water sample to be measured.
The monitoring method of COD on-Line Monitor Device in a kind of water the most according to claim 3, it is characterised in that step one,
Described xenon source is full spectral measurement to water sample to be measured.
The monitoring method of COD on-Line Monitor Device in a kind of water the most according to claim 4, it is characterised in that described
Full spectral measurement, for the wavelength between 200nm to 800nm.
The monitoring method of COD on-Line Monitor Device in a kind of water the most according to claim 3, it is characterised in that by adjusting
That saves xenon source beats modulating voltage and number of times, and the angles and positions of regulation grating, is used for meeting monitoring device along with to be measured
The change of water sample operating mode can normally be monitored.
The monitoring method of COD on-Line Monitor Device in water the most according to claim 3, it is characterised in that described spectrogrph
Distance scalable between module and light source, for the monitoring requirements of machine with wide range COD.
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106596460A (en) * | 2016-12-22 | 2017-04-26 | 江苏国泰环境监测有限公司常熟分公司 | Infrared spectroscopy oil measuring device |
CN108872144A (en) * | 2018-09-13 | 2018-11-23 | 中国农业大学 | A kind of on-Line Monitor Device for anaerobic digestion process |
CN108996676A (en) * | 2018-09-18 | 2018-12-14 | 许东俊 | A kind of sewage aeration processing unit |
CN109142247A (en) * | 2018-08-20 | 2019-01-04 | 山东润智能科技有限公司 | COD monitors system in spectrochemistry oxygen demand sensor and medical waste water |
CN110082302A (en) * | 2019-05-28 | 2019-08-02 | 艾西姆(辽宁)环境技术有限公司 | A kind of landfill leachate biochemical tail water COD on-line monitoring method |
CN111060453A (en) * | 2019-12-23 | 2020-04-24 | 江西省水投江河信息技术有限公司 | Multi-parameter water body monitoring device and method |
CN113984671A (en) * | 2021-09-27 | 2022-01-28 | 苏州雷博亚仪器有限公司 | Multi-index detector and method for online or real-time detection of water quality |
CN114184549A (en) * | 2021-12-10 | 2022-03-15 | 西湖大学 | Aquatic TOC and COD quick detection device based on AI degree of depth study |
CN114577742A (en) * | 2022-03-04 | 2022-06-03 | 武汉理工大学 | Method and device for detecting pollutants in water |
CN114814071A (en) * | 2022-06-17 | 2022-07-29 | 武汉正元环境科技股份有限公司 | Water quality detection method based on ion chromatography |
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CN102661923A (en) * | 2012-05-03 | 2012-09-12 | 四川碧朗科技有限公司 | Complex monitor for automatically monitoring multiple parameters of water on line |
CN105259129A (en) * | 2015-11-12 | 2016-01-20 | 浙江微兰环境科技有限公司 | Probe type water quality multi-parameter online monitor and monitoring method thereof |
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Patent Citations (2)
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CN102661923A (en) * | 2012-05-03 | 2012-09-12 | 四川碧朗科技有限公司 | Complex monitor for automatically monitoring multiple parameters of water on line |
CN105259129A (en) * | 2015-11-12 | 2016-01-20 | 浙江微兰环境科技有限公司 | Probe type water quality multi-parameter online monitor and monitoring method thereof |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106596460A (en) * | 2016-12-22 | 2017-04-26 | 江苏国泰环境监测有限公司常熟分公司 | Infrared spectroscopy oil measuring device |
CN109142247A (en) * | 2018-08-20 | 2019-01-04 | 山东润智能科技有限公司 | COD monitors system in spectrochemistry oxygen demand sensor and medical waste water |
CN108872144A (en) * | 2018-09-13 | 2018-11-23 | 中国农业大学 | A kind of on-Line Monitor Device for anaerobic digestion process |
CN108872144B (en) * | 2018-09-13 | 2021-02-12 | 中国农业大学 | A on-line monitoring device for anaerobic digestion process |
CN108996676A (en) * | 2018-09-18 | 2018-12-14 | 许东俊 | A kind of sewage aeration processing unit |
CN110082302A (en) * | 2019-05-28 | 2019-08-02 | 艾西姆(辽宁)环境技术有限公司 | A kind of landfill leachate biochemical tail water COD on-line monitoring method |
CN111060453A (en) * | 2019-12-23 | 2020-04-24 | 江西省水投江河信息技术有限公司 | Multi-parameter water body monitoring device and method |
CN113984671A (en) * | 2021-09-27 | 2022-01-28 | 苏州雷博亚仪器有限公司 | Multi-index detector and method for online or real-time detection of water quality |
CN114184549A (en) * | 2021-12-10 | 2022-03-15 | 西湖大学 | Aquatic TOC and COD quick detection device based on AI degree of depth study |
CN114577742A (en) * | 2022-03-04 | 2022-06-03 | 武汉理工大学 | Method and device for detecting pollutants in water |
CN114577742B (en) * | 2022-03-04 | 2024-09-03 | 武汉理工大学 | Method and device for detecting pollutants in water |
CN114814071A (en) * | 2022-06-17 | 2022-07-29 | 武汉正元环境科技股份有限公司 | Water quality detection method based on ion chromatography |
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Application publication date: 20161214 |