CN208140564U - Water quality on-line monitoring instrument and measuring unit - Google Patents
Water quality on-line monitoring instrument and measuring unit Download PDFInfo
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- CN208140564U CN208140564U CN201820786048.3U CN201820786048U CN208140564U CN 208140564 U CN208140564 U CN 208140564U CN 201820786048 U CN201820786048 U CN 201820786048U CN 208140564 U CN208140564 U CN 208140564U
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Abstract
The utility model relates to a kind of water quality on-line monitoring instruments comprising for the measuring unit that the water quality to water sample measures, which includes：Measuring cell (22), the measuring cell (22) are configured to accommodate water sample to be monitored；Light supply apparatus, the light supply apparatus are configured to emit the light for monitoring the water sample to be monitored to the measuring cell (22)；Temperature control device, the temperature control device are constructed to be permeable to for the temperature of the water sample to be monitored in the measuring cell being maintained in the water sample to be monitored within the temperature range of will not generating sediment or crystal.In addition, the utility model further relates to a kind of measuring unit.By them, accurate COD test result can be obtained, measurement process is significantly simplified and significantly improves measurement efficiency.
Description
Technical field
The utility model relates to a kind of water quality on-line monitoring instrument, which includes for the water quality to water sample
The measuring unit measured.In addition, the utility model is related to a kind of measuring unit, also in particular for water quality on-line monitoring instrument
Measuring unit.
Background technique
Currently, water pollution problems increasingly causes to pay close attention to as an environmental protection problem outstanding.In order to protect the mankind to rely
With the water environment of existence, ensure people's drinking water hygiene, on the one hand needs to detect the water quality in production, life, another party
Face must also reinforce the monitoring to various productions and sanitary sewage discharge.
During being monitored to water environment, water quality detecting device is generallyd use, has been widely used for generating electricity
Factory, sewage treatment plants, textile mills, pharmaceutical factory, environmental protection administration, epidemic prevention department, hospital etc..Especially, Water Test Kits
Quality monitoring water environment is played a crucial role.
Currently, China's water pollution is serious, COD (COD) is the normal survey item that organic matter is characterized in water quality monitoring
Mesh, and have become an important water quality monitoring index.The national standard detection method of COD is potassium bichromate reflux
Method, this method accurate, high repeatability and other advantages with measurement result.
Existing COD water quality online monitoring instruments are with potassium dichromate method to surface water, sanitary sewage and industrial wastewater etc.
The water quality of every profession and trade carries out the on-line monitoring of COD content of material.Its main test philosophy is with spectrophotometry.
The COD water quality online monitoring instruments being currently known mainly use 450nmLED for light source, are oxidation with potassium bichromate
Agent, and it is aided with mercuric sulfate and silver sulfate.In resolution oxidation process, dichromate ion is consumed, thus the face of dichromate ion
Color can subside, and by digestion solution cooling and be transferred in measuring cell, with the color of 450nmLED detection digestion solution.According to test weight chromium
The content of acid group color changed to determine COD in water, the basic range of test are 0~200mg/L, when the high COD sample of test
When product, highly diluted multiple and multiple testing ranges is needed to meet the needs of market.
However, there is high chlorine in above-mentioned COD water quality online monitoring instruments：In current COD water quality In-circiut tester,
Reagent 1 includes oxidant and chloride ion screening agent, includes catalyst in reagent 2 and provides strong acid media.Chloride ion screening agent institute
The metering that maximum masking chloride ion can be provided is 500mg/L.Thus, when sample concentration is higher than 500mg/L, in actual water sample
Chlorine ion concentration can be up to 3000mg/L, and chloride ion can generate silver nitride precipitation with the catalyst silver ion in reagent 2, so that
Digestion solution after cooling becomes muddy, thus is unable to measure accurate shading value.Meanwhile excess of chloride ion also can be anti-with oxidant
Answer, consume potassium bichromate, 1mg/L chloride ion consumption dichromate ion and generate the COD of about 0.226mg/L, thus generate false sun
Property test result.
In addition, the problem that current COD water quality on-line computing model is narrow there is also testing range：When use 450nmLED for
When light source, the light of 450nm is very sensitive to dichromate ion, and extinction coefficient is higher, thus when sensitive component is photosensitive close to when being saturated
216mg/L COD can only theoretically be aoxidized by obtaining maximum oxidant concentration.Under the premise of guaranteeing test accuracy, pass through dilution
(for example, it is desired to 10 times of dilutions) could be by Range Extension to 2000mg/L.But in actual field water sample, COD concentration may reach
To 5000mg/L, thus product is unable to satisfy the application of these occasions at present.
In addition, the problem that current COD water quality on-line computing model is low there is also oxidation efficiency：About the main phase of oxidation efficiency
The factor of pass is the amount of digestion condition and oxidant.As the COD tested in used water difficult to degradate, as waste water from dyestuff, slaughterhouse are useless
Water, waste water of paper mill etc. are often in the presence of that COD test result is serious relatively low, the main reason is that detecting based on 450nm
The limitation of light, oxidant concentration are low.
Especially, there is also the higher problems of wastewater flow rate for current COD water quality on-line computing model：Inspection based on current COD
The limitation of 450nm detection light and the requirement of detection cell in survey method need sample after large volume sample injection and resolution to dilute, therefore
Excessive poisonous and harmful waste water is generated, user's wastewater treatment difficulty is increased.
Finally, the testing range automatic switchover of current COD water quality on-line computing model is also complex.For example, current water
Matter on-line computing model have basic, normal, high three measuring ranges respectively correspond 0~200mg/L, 200~800mg/L and 800~
The test scope of 2000mg/L.When automatic switching range, needs to design a large amount of range switch logics to complete to switch, need sometimes
Accurate result can just be obtained by carrying out 3 switchings.In this way, test needs 1 hour every time, needed when completing a sample test
3 hours, greatly sample test interval time of 2 hour time on site, thus generate test error.
For this purpose, being measured always in the presence of obtaining accurate COD test result, significantly simplify in monitoring water quality on line field
Journey, the demand for significantly improving measurement efficiency.
Utility model content
The utility model relates to a kind of water quality on-line monitoring instrument, which includes for the water quality to water sample
The measuring unit measured, measuring unit include：Measuring cell, measuring cell are configured to accommodate water sample to be monitored；Light supply apparatus,
Light supply apparatus is configured to emit the light for monitoring water sample to be monitored to measuring cell；Temperature control device, temperature control device
It is constructed to be permeable to for the temperature of the water sample to be monitored in the measuring cell being maintained in water sample to be monitored and will not generate sediment
Or within the temperature range of crystal.
By the water quality on-line monitoring instrument, accurate COD test result can be obtained and significantly improve measurement efficiency.
Preferably, which is configured to the temperature of the water sample to be monitored in measuring cell being maintained at 80
DEG C or more.It may insure that sediment or crystal will not be generated in water sample to be monitored by the temperature control device, to make
It is more accurate to obtain test result.
It is highly preferred that temperature control device is configured to for the temperature of the water sample to be monitored in measuring cell being maintained at
100 ± 2 DEG C, to ensure that water sample to be monitored will not boil.It can ensure that digestion solution will not boil and evaporate at this temperature as a result,
Moisture and cause false positive test error.
Especially, water quality on-line monitoring instrument is used to monitor the COD in water sample, which can be configured to
Its greatest measurement is in the range of the COD of 1500-2500 mg/litre.Accordingly, for the water to be monitored of high concentration
Sample can significantly simplify measurement process by this high range and significantly improve measurement efficiency.
Particularly advantageously, light supply apparatus includes the light source component for the light that launch wavelength is 610 nanometers.Using 610nm's
The trivalent chromium concentration that optical tests generate, extinction coefficient ratio potassium bichromate want low 7 times, thus will survey in identical range of absorbency
It tries range and expands 7 times or more.
In particular, water quality on-line monitoring instrument can also include valve, measuring cell is associated with the valve, which is configured to for making
Dilution selectively flows into measuring cell, to be diluted to water sample to be detected.By the valve, it is selectively right to may be implemented
Water sample to be monitored is diluted, to further increase test efficiency.
In addition, measuring unit can also include at least one optical receiver, the optical receiver for receive be transmitted through to
The light of the water sample of monitoring, optical receiver is associated with ADC sampler, in order to which the signal of optical receiver is carried out analog-to-digital conversion,
To carry out real-time control to online water quality monitoring.
Advantageously, water quality on-line monitoring instrument can also include controller, which can be associated with ADC sampler,
Aforementioned valve is activated when being higher than threshold value with the monitoring result exported in ADC sampler, so that dilution is to be detected in measuring cell
Water sample.By the operation so automated, entire measurement process can be made easily operated, and efficiency greatly improves.
It is also conceivable that light supply apparatus can also include beam splitter, which is configured to make from light source component
Light in a part be transmitted through beam splitter, and another part in light is reflected via beam splitter, one through transmiting
Light splitting is perpendiculared to one another with another part light through reflection.Thus, it is possible to change of the real-time absorbance avoided with environment temperature
Change and changes.
In addition, the utility model further relates to a kind of measuring unit, measuring unit, should for measuring to the water quality of water sample
Measuring unit includes：Measuring cell, measuring cell are configured to accommodate water sample to be monitored；Light supply apparatus, light supply apparatus are configured to survey
Amount pond emits the light for monitoring water sample to be monitored；And temperature control device, temperature control device are constructed to be permeable to be in
The temperature of water sample to be monitored in measuring cell is maintained in water sample to be monitored the temperature that will not generate sediment or crystal
In range.
Detailed description of the invention
Fig. 1 schematically illustrates the structure chart of the measuring unit according to the present utility model for water quality on-line monitoring instrument；
Fig. 2 schematically illustrates the chlorine ion concentration digestion solution of measuring unit according to the present utility model at different temperatures
Absorbance curve；
Fig. 3 schematically illustrates the light source and ADC in 610 nano wave lengths of use of measuring unit according to the present utility model
COD calibration curve in the case where sampler.
Specific embodiment
In each attached drawing of the utility model, all parts of COD water quality on-line computing model 100 are only symbolically shown
Between it is basic fluidly connect relationship, without specifically illustrating other necessary parts in fluid circuit (for example, control unit
Part, power supply part, driving part etc.).But one of skill in the art will understand that unshowned component is not that this is practical new
The key content of type, thus hereinafter repeat no more.
Water quality on-line monitoring instrument 100 according to the present utility model may include resolution unit, the water for water quality monitoring
Sample body, one or more reaction reagents, air etc. can successively flow into the resolution unit and be chemically reacted.
It, can be (all by the oxidant in reagent 1 according to the utility model in order to solve the problems, such as aforementioned oxidation low efficiency
Such as, K2Cr2O7) content increases more times, such as 20 times (such as 80-84g/L).
In particularly advantageous embodiment, the sample volume of water sample can be such as 2.80 to 3.10 milliliters.At this point, reagent
1 dosage can be 0.87 milliliter to 1.0 milliliters, wherein including 84g/L K2Cr2O7+ 75~100g/L HgSO4(in 10% sulphur
In acid solution).Thus, it is possible to obtain enough HgSO4To shelter the chloride ion of 3000mg/L.In addition, the dosage of reagent 2 can be with
For example, 2.0 milliliters to 2.24 milliliters, it includes the Ag that concentration is 12g/L2SO4(in concentrated sulfuric acid).It will be understood that this
Utility model is not limited to the above-mentioned example capacity of water sample and each reagent.
Water quality on-line monitoring instrument 100 according to the present utility model should also include measuring unit 20.For example, being configured to comprising surveying
The measuring unit 20 in amount pond 22 receives the liquid that chemical reaction is had already passed through in resolution unit, thus to the liquid
Learn the monitoring of oxygen demand or the monitoring of ammonia-nitrogen content.Advantageously, measuring cell 22 is mainly used for accommodating water sample to be monitored.
In the present invention, term " water sample to be monitored " be it is reacted after water sample, such as be added various reagents it
Water sample (that is, water sample in the state of being able to carry out monitoring) afterwards, rather than enter original in water quality on-line monitoring instrument
Water sample.
It is understood that resolution unit and measuring unit 20 can integrate as a module, for example clear up measurement module, i.e.,
Water sample can be chemically reacted in the module, such as clear up and measure in the same module.But it also will be understood that
Arrive, clearing up unit and measuring unit 20 is two units independent of each other, i.e., only in measuring unit 20 to the water quality of water sample into
Row measurement.
When using spectrophotometry test COD, which includes at least one light supply apparatus.Preferably, should
Light supply apparatus includes the light source component 24 of such as LED, but it is also contemplated that other common visible or sightless light source components
24.The light supply apparatus is mainly used for emitting the light for detecting water sample to be monitored to measuring cell 22.
It is understood that the measuring cell 22 of measuring unit 20 includes the pool wall material that can pass through light, especially at least part
The material of light transmission, especially transparent material.It is not the key content of the utility model in view of light-transmitting materials, therefore no longer superfluous
It states.
Correspondingly with light supply apparatus, measuring unit 20 can also include at least one optical receiver.For example, at least one light
Receiver includes the first optical receiver 28, and first optical receiver 28 is for receiving the water to be monitored being transmitted through in measuring cell 22
The light of sample.The optical receiver can be associated with the ADC sampler being further described below.
Advantageously, first optical receiver 28 and light supply apparatus relative positioning are diametrically about measuring cell 22 at them
Relative position is separated from each other 180 degree around measuring cell 22.It will be understood that their relative to each other other
Position is also feasible.
Light supply apparatus according to the present utility model can also include beam splitter 26 other than light source component 24.The light splitting
Element 26 may be configured so that a part in the light from light source component 24 be transmitted through the liquid in measuring cell 22 and
Reach the first optical receiver 28, and another part in the light from light source component 24 is reflected into second via the beam splitter 26
Optical receiver 29.Preferably, the optical path of a part of light and another part light through reflection through transmiting extends perpendicular to each other.
As shown in fig. 1, specific beam splitting system can be used according to the utility model, it will be from light source component 24, such as
In a part of light light splitting to the second optical receiver 29 for measuring 90 degree with sample of LED.As reference, by designing specific light splitting
The beam splitter 26 of ratio, such as light splitting piece and the first optical receiver 28 and the second optical receiver 29 arrive beam splitter 26
Distance, with the voltage that ensures to measure at the first optical receiver 28 and the second optical receiver 29 with its environment temperature change rate with
Ratio between the two is consistent.The real-time absorbance obtained in this way does not just change with the variation of environment temperature substantially.
Particularly advantageously, the light source component 24 of light supply apparatus according to the present utility model uses wavelength for 610 nanometers
The light of light, especially LED.The trivalent chromium concentration generated using the optical tests of 610nm, extinction coefficient ratio potassium bichromate want low 7
Times, thus test scope is expanded 7 times or more in identical range of absorbency, i.e., basic range can survey COD test scope
It tries to 1500 to 2500mg/L, such as 2000mg/L.In the present invention, the maximum value of range can be referred to as measuring unit
Greatest measurement.
According to the utility model, measuring unit further includes temperature control device, which is constructed to be permeable to locate
The temperature of sediment or crystal will not be generated in the water sample that the temperature of the water sample to be monitored in measuring cell is maintained to be monitored
It spends in range, such as 80 DEG C or more.Water sample to be monitored is kept in measuring cell 80 DEG C or more can thus prevent chloride ion with
Silver ion in conjunction with and generate sediment or other substances and crystallized because of temperature change, interference optical system to resolution product survey
Examination.
For example, temperature control device may include heating device, especially electric heater unit, such as heating wire, but unlimited
In this, it is also possible to those skilled in the art and is contemplated that other appropriate devices for being used to keep temperature.
In special preferred embodiment, temperature control device is configured to will be described to be monitored in the measuring cell
The temperature of water sample be maintained at 100 ± 2 DEG C, so that meeting prevents chloride ion and silver ion from generating the temperature of precipitating, while by energy
Ensure at this temperature digestion solution will not boil and evaporation water and cause false positive test error.
In addition, measuring unit according to the present utility model can also include ADC sampler, the ADC sampler be chosen to
Maximum absorbance can be increased to 1.75 less, thus 2000mg/L, even can be improved in the range of basic test range
2500mg/L, and have 20% leeway for meeting the requirement of testing progress when range switching.
Here, term " absorbance " refer to light by incident intensity before solution or substance and light by solution or
The denary logarithm of the ratio of transmitted intensity after a certain substance.As shown in Figure 2, absorbance is generally with solution temperature
Raising and reduce.The not solution of chloride ion and chlorine ion concentration are compared in the example graph is up to 3000mg/L
Solution absorbance with solution temperature situation of change.
Also as shown in Figure 3, in the case where the light using 610 nano wave lengths is as light source, especially according to this reality
In the case where novel ADC sampler, absorbance with COD concentration changing condition.Such as following table it is found that using 610 nanometer waves
Long light can make the error under various COD concentration keep as light source (and optionally with new ADC sampler)
In a lesser, satisfactory range.
Table 1：The light of 610 nano wave lengths as light source in the case where be directed to various COD concentration error
In addition, measuring unit according to the present utility model no longer needs to make since the light using 610 nano wave lengths is as light source
With Macrodilution liquid, such as deionized water, this dilution is admitted in measuring cell by pipeline, valve etc., to dilute wait supervise
The water sample of survey.Therefore, the volume of water sample to be monitored according to the present utility model can reduce approximately half of or at least three points
One of, waste liquid discharge capacity is thus greatly reduced, simplifies the liquid waste processing amount of whole system.Meanwhile the ratio between sulfuric acid and chloride ion
It is higher than the prior art, it is possible thereby to improve the chloride ion ability sheltered under high temperature, shelter as much as possible at concentrations up to
The chloride ion of 3000mg/L.
In addition, can provide a kind of new testing process by the measuring unit of the utility model, which is significantly simplified
Measurement process saves time of measuring, ensures measurement accuracy less by the influence of time fluctuation.
Following table illustratively lists between testing process according to the present utility model and the testing process of the prior art
Specific difference.
Table 2：The comparison of existing measurement procedure and new measurement procedure
| Step | Existing procedure | Process according to the present utility model |
| 1 | Initialization | Initialization |
| 2 | Blank detection | Blank detection |
| 3 | Sample introduction | Sample introduction |
| 4 | Add reagent 1 | Add reagent 1 |
| 5 | It is reacted under room temperature | It is reacted at 50~70 DEG C |
| 6 | Add reagent 2 | Add reagent 2 |
| 7 | Resolution | Resolution |
| 8 | It is cooled to<65℃ | Cool to 100 DEG C |
| 9 | Digestion solution transfer | Digestion solution transfer |
| 10 | Photometric detection under room temperature | Photometric detection at 100 DEG C |
| 11 | Waste discharge under room temperature | Waste discharge at 100 DEG C |
| 12 | Cleaning | Cleaning |
More specifically, compared by upper table and changed in reagent 1 (i.e. R1) in testing process according to the present utility model
HgSO4With the reaction condition of chloride ion, so as to HgSO4More preferably play the role of shielding chloride ion.In addition, absorbance measurement and
Discharge waste liquid is also carried out in the case where being higher than 80 DEG C (such as, in this embodiment use 100 DEG C), to avoid it is following the occurrence of：
That is, generating precipitating during absorbance is tested and discharges waste liquid, test result and blocking instrument flow pipeline system are seriously affected
System, and then damage instrument and equipment.
The basic range of measuring unit according to the present utility model is 0~2000mg/L (even up to 2500mg/L), together
More times of Shi Caiyong, such as 3 times or 4 times of diluted methods, further can be increased to 5000mg/L for range.Additionally it is possible to
Save the time of instrument calibration and range switching.For example, common prover time was reduced to 90 minutes by original 3 hours, range
Time of measuring is also by 3 hours compared with as low as 90 minutes when switching, to reduce the influence of water sample to be monitored by the time.
In the following, illustrating the measurement stream for the COD measurement that measuring unit according to the present utility model obtains by an example
The result of journey and acquisition.In this example, in varying environment temperature and long-time life test, using high-precision syringe pump
For sample introduction, 5 times or less dilution bring dilution errors can be according to ignoring.In this example, can be expired using 2 ranges
The measurement of the live COD of 0~5000mg/L of foot.
Table 3：Syringe body 4 DEG C with 40 DEG C when different extension rates volume error
Shown volume error can be calculated by following formula and be obtained in the table：
Error %=(V40℃-V5℃)/V20℃× 100% formula 1
Wherein, V40℃Volume when being 40 DEG C, V5℃Volume and V when being 5 DEG C20℃Volume when being 20 DEG C.
Assuming that the attainable basic range of measuring unit according to the present utility model institute is 0~2000mg/L, and the survey
Amount unit design has high range, and high range coefficient can be, for example, 3, that is, carries out 3 times of dilutions.But it is also contemplated that other multiples are dilute
It releases.
As can be seen from the above table, when extension rate is not more than 4, dilution error can be controlled within 5%.Therefore,
Tested after sample is diluted within the scope of basic range, then with basic range, test result directly multiplied by 3 (or
The other corresponding multiples of person) be exactly afterwards COD in authentic sample result.
In terms of instrument calibration, only need to calibrate basic range in this example.
Water quality on-line monitoring instrument according to the present utility model can also include controller, the controller for basic range and
Switching between high range.For example, when current range is basic range, if test result is higher than first threshold, such as
2400mg/L, then controller can instruct into high range mode, such as carry out more times, such as 3 times dilutions to water sample to be monitored.
Then, when current range is high range, if test result is lower than second threshold, such as 1600mg/L, controller can be with
It instructs again and returns to basic range.
First threshold is usually different from second threshold, this is because considering to avoid controller due to numerical value minor fluctuations (example
Such as, caused by temperature) and the case where switch repeatedly.
For this purpose, water quality on-line monitoring instrument can also include valve, measuring cell is associated with the valve.In the present invention, art
Language " associated " refer to generation connection (but the physical link for being not necessarily entity), such as can be therebetween for directly or
Person is indirectly connected with, and is also possible to one of them and include/is integrated into another one, or it may occur to persons skilled in the art that other
Interrelational form.
The valve is configured to for making dilution selectively flow into measuring cell, to be diluted to water sample to be detected.Cause
This, when controller instruction enters high range from basic range, it can activate valve, so that dilution is to be checked in measuring cell
The water sample of survey.
For example, the valve can be connected with the deionized water reservoir of water quality on-line monitoring instrument either internally or externally is located at,
So that deionized water can be introduced into measuring cell as dilution.The water sample through monitoring after measurement test is together with dilution
Liquid is discharged measuring unit together and water quality on-line monitoring instrument is discharged if possible.
In contrast to this, in existing water quality on-line monitoring instrument, lower range, middle range and the high range generallyd use is amounted to
Three kinds of ranges.Firstly, needing to calibrate three ranges respectively when to instrument calibration, time-consuming consumption reagent again.Turn secondly, carrying out range
It carries out just obtaining correct result after attempting at least twice when changing.
Actual test data is listed in the following table.It is clear that measuring unit according to the present utility model can lead to
The monitoring for crossing the COD water sample of various concentration, that is, meet defined experimental error.Test result verifying uses completely new calibrating mode
(using lower than 5 times dilutions), directly using basic range and high range coefficient (using 4 times of dilutions in this example), test result
Accuracy and accuracy all comply with the national standard requirements.
Table 4：The monitoring result of COD water sample
Although the water quality on-line monitoring instrument of the utility model is described according to chemical requirement, it is not excluded for pair
The application that other amounts of water quality, such as ammonia-nitrogen content measure.
Heretofore described specific embodiment is only preferable embodiment, is not intended to limit by following the claims
Protection scope defined by book.Those skilled in the art can according to the present invention described in content make equivalence changes and remodeling, this
Both fall within protection scope of the present invention.
Claims (10)
1. a kind of water quality on-line monitoring instrument (100), the water quality on-line monitoring instrument include measuring for the water quality to water sample
Measuring unit (20), which is characterized in that the measuring unit (20) includes：
Measuring cell (22), the measuring cell (22) are configured to accommodate water sample to be monitored；
Light supply apparatus, the light supply apparatus are configured to emit to the measuring cell (22) for monitoring the water sample to be monitored
Light；
Temperature control device, the temperature control device are constructed to be permeable to the water sample to be monitored in the measuring cell
Temperature be maintained in the water sample to be monitored and will not generate sediment or crystal within the temperature range of.
2. water quality on-line monitoring instrument as described in claim 1, which is characterized in that the temperature control device is configured to be in
The temperature of the water sample to be monitored in the measuring cell is maintained at 80 DEG C or more.
3. water quality on-line monitoring instrument as claimed in claim 2, which is characterized in that the temperature control device is configured to be in
The temperature of the water sample to be monitored in the measuring cell is maintained at 100 ± 2 DEG C, to ensure that the water sample to be monitored will not
Boiling.
4. water quality on-line monitoring instrument as claimed in claim 3, which is characterized in that the water quality on-line monitoring instrument is for monitoring water
COD in sample, the measuring unit are configured to its greatest measurement in the COD of 1500-2500 mg/litre
In the range of.
5. water quality on-line monitoring instrument as claimed in claim 4, which is characterized in that the light supply apparatus includes that launch wavelength is
The light source component (24) of 610 nanometers of light.
6. water quality on-line monitoring instrument as claimed in claim 5, which is characterized in that it further include valve, the measuring cell and the valve
Associated, the valve is configured to for making dilution selectively flow into the measuring cell, with to the water sample to be detected into
Row dilution.
7. water quality on-line monitoring instrument as claimed in claim 6, which is characterized in that the measuring unit further includes at least one light
Receiver (28), the optical receiver is for receiving the light for being transmitted through the water sample to be monitored, the optical receiver and ADC
Sampler is associated.
8. water quality on-line monitoring instrument as claimed in claim 7, which is characterized in that the water quality on-line monitoring instrument includes control
Device, the controller is associated with the ADC sampler, when being higher than threshold value with the monitoring result exported in the ADC sampler
The valve is activated, so that dilution is located at the water sample to be detected in the measuring cell.
9. water quality on-line monitoring instrument as claimed in claim 8, which is characterized in that the light supply apparatus further includes beam splitter
(26), the beam splitter (26) is configured to make a part in the light from the light source component (24) to be transmitted through described point
Optical element (26), and another part in the light is reflected via the beam splitter (26), a part of light and warp through transmiting
Another part light of reflection is perpendicular to one another.
10. a kind of measuring unit (20), the measuring unit is for measuring the water quality of water sample, which is characterized in that described
Measuring unit includes：
Measuring cell (22), the measuring cell (22) are configured to accommodate water sample to be monitored；
Light supply apparatus, the light supply apparatus are configured to emit to the measuring cell (22) for monitoring the water sample to be monitored
Light；
Temperature control device, the temperature control device are constructed to be permeable to the water sample to be monitored in the measuring cell
Temperature be maintained in the water sample to be monitored and will not generate sediment or crystal within the temperature range of.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514641A (en) * | 2019-08-16 | 2019-11-29 | 上海化工研究院有限公司 | A kind of Raman spectroscopy measures the device and its application method of microprecipitation object in water |
| WO2024046369A1 (en) * | 2022-08-31 | 2024-03-07 | 上海博取仪器有限公司 | Anti-interference water quality analysis instrument test method |
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2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514641A (en) * | 2019-08-16 | 2019-11-29 | 上海化工研究院有限公司 | A kind of Raman spectroscopy measures the device and its application method of microprecipitation object in water |
| CN110514641B (en) * | 2019-08-16 | 2022-03-18 | 上海化工研究院有限公司 | Device for measuring trace precipitates in water by Raman spectroscopy and using method thereof |
| WO2024046369A1 (en) * | 2022-08-31 | 2024-03-07 | 上海博取仪器有限公司 | Anti-interference water quality analysis instrument test method |
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