CN117571946A - Multi-parameter water quality on-line monitoring system and method - Google Patents
Multi-parameter water quality on-line monitoring system and method Download PDFInfo
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- CN117571946A CN117571946A CN202311530626.9A CN202311530626A CN117571946A CN 117571946 A CN117571946 A CN 117571946A CN 202311530626 A CN202311530626 A CN 202311530626A CN 117571946 A CN117571946 A CN 117571946A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 348
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012544 monitoring process Methods 0.000 title claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 160
- 238000005259 measurement Methods 0.000 claims abstract description 68
- 238000004140 cleaning Methods 0.000 claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 47
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 14
- 229910052801 chlorine Inorganic materials 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 14
- 239000010865 sewage Substances 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 3
- 238000000790 scattering method Methods 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 5
- 238000009614 chemical analysis method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000001223 reverse osmosis Methods 0.000 description 4
- 239000003651 drinking water Substances 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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Abstract
The invention relates to a multi-parameter water quality on-line monitoring system and a method, wherein the system comprises a cabinet, and the cabinet is internally provided with: the sampling module is used for extracting and storing the water sample at the sampling point; the diaphragm pump module is used for extracting the water sample stored by the sampling module; the electrode measuring module is used for detecting a water sample, and an electrode measuring water inlet of the electrode measuring module is connected with a diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve; the cleaning and calibrating module is used for processing the water sample to generate pure water and carrying out cleaning and calibrating on the light measuring module; the optical measurement module is used for detecting a water sample, the optical measurement water inlet of the optical measurement module is connected with the cleaning calibration water outlet of the cleaning calibration module through a third electromagnetic valve, and the optical measurement water outlet of the optical measurement module is connected with the system water outlet through a pipeline; the controller module is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the diaphragm pump module, the electrode measuring module and the light measuring module.
Description
Technical Field
The invention relates to the technical field of water quality monitoring, in particular to a multi-parameter water quality on-line monitoring system and method.
Background
Common monitoring parameters of the water quality online monitoring system are turbidity, residual chlorine, PH and conductivity, and lack of monitoring of organic matters and chromaticity in water. In organic matter monitoring, TOC and BOD parameters are important indexes, the conventional detection method is to measure the TOC and the BOD parameters by a chemical analysis method, but the measurement period is long, the cost is high, the accuracy is low, the water sample to be monitored is directly connected to the water inlet of the water quality online monitoring system by the water quality online monitoring system, but the water quality online monitoring system and the monitored water sample lack of physical isolation, when the water supply pressure is insufficient, the water monitored in the water quality online monitoring system has a backflow risk, secondary pollution is easily caused to the monitored water sample after detection, and the operation cost is increased by using chemical reagents. Meanwhile, when the water quality on-line monitoring system works, water is continuously fed to monitor and then discharged, the water consumption is large, and the water resource waste is serious, so that the system is not suitable for the scene of lack of water resource.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multi-parameter water quality on-line monitoring system and a multi-parameter water quality on-line monitoring method, and aims to solve the problems of long measurement period, high cost, low accuracy and serious water resource waste.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, a multiparameter water quality on-line monitoring system includes a cabinet, the cabinet internally mounted has:
the sampling module is used for extracting and storing water samples of sampling points, and a sampling water inlet of the sampling module is connected with an external water inlet pipe through a first electromagnetic valve;
the diaphragm pump module is used for extracting the water sample stored by the sampling module, and a diaphragm water inlet of the diaphragm pump module is connected with a sampling water outlet of the sampling module through a pipeline;
the electrode measuring module is used for detecting the water sample, and an electrode measuring water inlet of the electrode measuring module is connected with a diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve;
the cleaning and calibrating module is used for processing the water sample to generate pure water, a cleaning and calibrating water inlet of the cleaning and calibrating module is connected with a diaphragm water outlet of the diaphragm pump module through a pipeline, and a sewage outlet of the cleaning and calibrating module is connected with a system water outlet through a fourth electromagnetic valve;
the light measuring module is used for detecting the water sample, a light measuring water inlet of the light measuring module is connected with an electrode measuring water outlet of the electrode measuring module through a pipeline, a light measuring water inlet of the light measuring module is connected with a cleaning and calibrating water outlet of the cleaning and calibrating module through a third electromagnetic valve, and a light measuring water outlet of the light measuring module is connected with a system water outlet through a pipeline;
and the control module is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the diaphragm pump module, the electrode measuring module and the light measuring module.
Further, the sampling module includes:
the sampling tank is used for storing the collected water sample, and the top and the bottom of the sampling tank are respectively provided with the sampling water inlet and the sampling water outlet; the sampling tank is also provided with an air inlet and a sampling overflow port, and the air inlet is arranged at the top of the sampling tank and is connected with the pneumatic pump through a one-way air inlet valve; the sampling overflow port is arranged at the side part of the sampling tank and is connected with the system water outlet through a one-way valve;
the liquid level meter is used for monitoring the sampling water level in the sampling tank, the liquid level meter is installed in the sampling tank, and the liquid level meter is electrically connected with the controller.
Further, the method further comprises the following steps:
the water sample volume measuring device comprises a flow meter module, a controller module and a controller module, wherein the flow meter module is used for detecting the volume of a water sample discharged by the system, a water inlet of the flow meter module is connected with a light measuring outlet of the light measuring module through a pipeline, a water outlet of the flow meter module is connected with a water outlet of the system through a pipeline, and the flow meter module is electrically connected with the controller module.
Further, the method further comprises the following steps:
the touch display screen is electrically connected with the controller and used for interacting with a user.
Further, the method further comprises the following steps:
the water leakage detection module is used for detecting whether water is accumulated in the cabinet or not, the water leakage detection module is electrically connected with the controller module, when water leakage occurs to a component arranged in the cabinet, the water sample can be accumulated in the cabinet, the liquid level can be gradually raised, the water leakage detection module is triggered, the controller can stop all measurement actions after receiving signals, and water leakage alarm information is displayed on the touch display screen; the liquid level in the cabinet is continuously increased and flows out from the system overflow port of the cabinet, so that the interior of the cabinet is ensured not to be completely submerged by the water sample.
Further, the electrode measurement module comprises one or more electrodes of different types and a corresponding number of electrode circulation grooves, the electrodes are arranged in the electrode circulation grooves, the bottom of each electrode circulation groove is provided with the electrode measurement water inlet, and the side part of each electrode circulation groove is provided with the electrode measurement water outlet;
wherein the types of the electrodes comprise residual chlorine electrodes, PH electrodes and conductivity electrodes;
when the electrode measuring module only comprises one electrode, the electrode measuring water inlet is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the electrode measuring water outlet is connected with the light measuring water inlet through a pipeline;
when the electrode measuring module comprises two electrodes of different types, the two electrode flow grooves are sequentially connected in series, wherein the electrode measuring water inlet of one electrode flow groove is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the electrode measuring water outlet of the other electrode flow groove is connected with the light measuring water inlet through a pipeline;
when the electrode measuring module comprises three electrodes of different types, the three electrode circulating grooves are sequentially connected in series, the first electrode measuring water inlet of the electrode circulating groove is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the last electrode measuring water outlet of the electrode circulating groove is connected with the light measuring water inlet through a pipeline.
In a second aspect, a multi-parameter water quality online monitoring method includes a sampling cleaning calibration process and a sampling measurement process;
the sampling, cleaning and calibrating process comprises the following steps:
step one: the user gives a sampling measurement instruction to the controller, the controller module opens the first electromagnetic valve, and the sampling module opens sampling;
step two: the liquid level meter monitors the sampling water level in the sampling module, when the sampling water level reaches the highest liquid level, the liquid level meter sends a signal to the controller module, and the controller module closes the first electromagnetic valve to finish sampling;
step three: after the sampling is finished, the controller module starts the diaphragm pump module to pump the water sample in the sampling module and convey the water sample to the self-cleaning calibration module;
step four: pure water is generated from the cleaning and calibrating module, the controller module opens the third electromagnetic valve, the pure water washes the ultraviolet visible light module, and the controller module reads the data of the ultraviolet visible light module and performs zero calibration;
step five: the controller opens a fourth electromagnetic valve connected with the sewage outlet of the cleaning and calibrating module to carry out sewage discharge, and after the sewage discharge is completed, the controller closes the fourth electromagnetic valve;
step six: finishing cleaning and zeroing;
wherein the sampling measurement process comprises the steps of:
step seven: repeating the first and second steps, and after sampling, starting the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve by the controller module, extracting a water sample in the sampling module, and sequentially introducing the water sample into the electrode measuring module and the light measuring module;
step eight: the electrode measuring module and the light measuring module monitor water samples, and the controller reads data of the electrode and the ultraviolet-visible light module to finish measuring water quality parameters;
step nine: and closing the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve, and waiting for a next sampling measurement instruction by the controller.
Further, in the sampling cleaning calibration process, the user can selectively issue the instruction of repeatedly executing the third step to the fifth step to the controller module.
Further, in the steps three to five repeatedly executed for a plurality of times, the liquid level meter monitors the sampling water level in the sampling module, and when the sampling water level reaches the lowest liquid level, the liquid level meter sends a signal to the controller module, and the controller module executes the steps one to two.
Further, in the sampling measurement process, the light measurement module measures a water sample by using a multi-wavelength technology, emits ultraviolet light wavelength, and measures organic parameters based on a spectrum absorption method; the light measuring module emits visible light wavelength and measures chromaticity parameters based on a spectrum absorption method; the light measurement module emits visible light wavelength, and turbidity parameters are measured based on a 90-degree scattering method.
The invention relates to a multiparameter water quality on-line monitoring system and a multiparameter water quality on-line monitoring method, which have the beneficial effects that:
the water sample is collected through the sampling module, and when the water sample needs to be measured, the water sample collected by the sampling module is extracted through the diaphragm pump module, so that the risk of water backflow of monitoring is avoided. Compared with the conventional chemical analysis method, the method has the advantages that the electrode measuring module and the light measuring module are used for detecting the water sample in the measuring process, the measuring period is shortened, the chemical reagent is not needed, the running cost is reduced, meanwhile, before the measurement, the light measuring module is cleaned and calibrated by the pure water generated by the cleaning and calibrating module, so that the accuracy of water quality parameter data is improved, the chemical reagent is not used in the detecting process, and the cleaning and calibrating module cleans part of the water sample into the pure water to clean the light measuring module, and therefore, the waste and pollution of water resources are not caused. Meanwhile, the electrode measuring module and the light measuring module are arranged to detect various parameters of the water sample.
Drawings
FIG. 1 is a schematic perspective view of a multi-parameter on-line monitoring system for water quality according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the internal structure of the multi-parameter on-line monitoring system for water quality according to the embodiment of the invention.
FIG. 3 is a schematic diagram of an electrical connection structure of a multi-parameter water quality on-line monitoring system according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of water sample flow through the multi-parameter on-line water quality monitoring system according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a sampling module according to an embodiment of the present invention.
Fig. 6 is a top view of a sampling module according to an embodiment of the present invention.
Fig. 7 is a schematic perspective view of an electrode measurement module according to an embodiment of the invention.
FIG. 8 is a flow chart of a method of a multi-parameter water quality on-line monitoring system according to an embodiment of the present invention.
Reference numerals illustrate:
1. a cabinet; 11. a system water inlet; 12. a system water outlet; 13. a system overflow port; 14. an embedded handle; 2. a sampling module; 21. a sampling water inlet; 22. sampling overflow port; 23. sampling a water outlet; 24. an air inlet; 25. a liquid level gauge; 3. a diaphragm pump module; 4. an electrode measurement module; 41. a PH electrode; 42. residual chlorine electrodes; 43. a conductivity electrode; 44. an electrode flow channel; 45. an electrode measuring water inlet; 46. an electrode measuring water outlet; 5. cleaning the calibration module; 6. a light measurement module; 71. a first electromagnetic valve; 72. a second electromagnetic valve; 73. a third electromagnetic valve; 74. a fourth electromagnetic valve; 75. a one-way valve; 8. a controller module; 81. a flow meter module; 82. a water leakage detection module; 83. and touching the display screen.
Detailed Description
The invention will be further described with reference to the drawings and the specific embodiments.
As shown in the figure, the invention discloses a multi-parameter water quality online monitoring system, which comprises a cabinet 1, wherein the cabinet 1 is internally provided with:
the sampling module 2 is used for extracting and storing the water sample at the sampling point, and a sampling water inlet 21 of the sampling module 2 is connected with an external water inlet pipe through a first electromagnetic valve 71;
the diaphragm pump module 3 is used for extracting the water sample stored in the sampling module 2, and a diaphragm water inlet of the diaphragm pump module 3 is connected with a sampling water outlet 23 of the sampling module 2 through a pipeline;
the electrode measurement module 4 is used for detecting a water sample, and an electrode measurement water inlet 45 of the electrode measurement module 4 is connected with a diaphragm water outlet of the diaphragm pump module 3 through a second electromagnetic valve 72;
the cleaning and calibrating module 5 is used for processing a water sample to generate pure water, a cleaning and calibrating water inlet of the cleaning and calibrating module 5 is connected with a diaphragm water outlet of the diaphragm pump module 3 through a pipeline, and a sewage outlet of the cleaning and calibrating module 5 is connected with the system water outlet 12 through a fourth electromagnetic valve 74;
the light measurement module 6 is used for detecting a water sample, a light measurement water inlet of the light measurement module 6 is connected with an electrode measurement water outlet 46 of the electrode measurement module 4 through a pipeline, a light measurement water inlet of the light measurement module 6 is connected with a cleaning calibration water outlet of the cleaning calibration module 5 through a third electromagnetic valve 73, and a light measurement water outlet of the light measurement module 6 is connected with a system water outlet 12 through a pipeline;
the controller module 8 is electrically connected with the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the fourth electromagnetic valve 74, the diaphragm pump module 3, the electrode measuring module 4 and the light measuring module 6.
The water sample is collected through the sampling module 2, and when the water sample needs to be measured, the water sample collected by the sampling module 2 is extracted through the diaphragm pump module 3, so that the risk of water backflow of monitoring is avoided. Compared with the conventional chemical analysis method, the method has the advantages that the electrode measuring module 4 and the optical measuring module 6 are used for detecting the water sample in the measuring process, the measuring period is shortened, the chemical reagent is not needed, the running cost is reduced, meanwhile, before the measurement, the optical measuring module 6 is cleaned and calibrated through the pure water generated by the cleaning and calibrating module 5, so that the accuracy of water quality parameter data is improved, the chemical reagent is not used in the detecting process, and the cleaning and calibrating module 5 cleans part of the water sample into the pure water to clean the optical measuring module 6, and therefore, the waste and pollution of water resources are not caused.
During the sampling process of the sampling module 2, the controller module 8 controls the second electromagnetic valve 72, the third electromagnetic valve 73 and the fourth electromagnetic valve 74 to be in a closed state, the diaphragm pump is also in a closed state, the electrode measuring module 4 and the light measuring module 6 are in a standby state, and the controller does not collect measurement data.
It should be noted that, in some embodiments, the cleaning calibration module 5 is a small composite filter membrane composed of sintered carbon and an RO membrane (reverse osmosis membrane). The collected water sample is firstly subjected to the removal of suspended matters, chromaticity and other substances in the water sample by sintered carbon, and then is subjected to RO (reverse osmosis) membrane, so that pure water is separated. When the system works, only the light measurement module 6 is cleaned and calibrated, and the required water sample is smaller than 100mL each time, so the self-cleaning self-calibration module can be miniaturized.
It should be noted that, the light measurement module 6 may emit ultraviolet light and visible light for detecting organic matter parameters, chromaticity parameters and turbidity parameters of the water sample. The electrode measuring module 4 can measure residual chlorine parameters, PH value parameters and conductivity parameters of the water sample.
As shown in fig. 2 to 6, the sampling module 2 in the present embodiment includes:
the sampling tank is used for storing collected water samples, and a sampling water inlet 21 and a sampling water outlet 23 are respectively arranged at the top and the bottom of the sampling tank; the sampling tank is also provided with an air inlet 24 and a sampling overflow port 22, and the air inlet 24 is arranged at the top of the sampling tank and is connected with a pneumatic pump through a one-way air inlet valve; the sampling overflow port 22 is arranged at the side part of the sampling tank and is connected with the system water outlet 12 through a one-way valve 75;
the liquid level meter 25 is used for monitoring the sampling water level in the sampling tank, the liquid level meter 25 is installed in the sampling tank, and the liquid level meter 25 is electrically connected with the controller.
The sampling water inlet 21 and the sampling water outlet 23 are respectively arranged at the top and the bottom of the sampling tank, so that the sampling module 2 collects water samples in an upper water inlet and lower water outlet mode, the water level is measured through the liquid level meter 25, the liquid level meter 25 feeds back measured liquid level data to the controller, and the highest sampled water level is determined. When the diaphragm pump pumps the water sample in the sampling tank to measure, the water level is still measured through the liquid level meter 25, the liquid level meter 25 feeds back the measured liquid level data to the controller module 8, and the lowest water level of the pumped water sample is determined. The water inlet of the sampling module 2 is isolated from the highest water level by a certain distance by air, so that the collected water sample and the water source are physically isolated. The side of the sampling module 2 is provided with a sampling overflow port 22 at an upper position, when the first electromagnetic valve 71 fails to sample or the liquid level meter 25 measures the failure, the water sample can be discharged through the sampling overflow port 22, the overflow port is connected with a one-way valve 75, and the one-way valve 75 is connected to the system water outlet 12. The top of the sampling module 2 is also provided with an air inlet hole, the air inlet hole is internally provided with a one-way air inlet valve, only outside air is allowed to enter the sampling module 2, but air or water sample in the sampling module 2 is not allowed to flow out, and the air is introduced through the air inlet 24, so that the collected water sample and a water source are always ensured to be physically isolated, secondary pollution to the monitored water sample after water source water quality detection caused by backflow risk is avoided, and meanwhile, the air pressure in the sampling tank can be maintained when the water sample in the sampling tank is pumped by the diaphragm pump for measurement.
As shown in fig. 2, 3 and 4, in some embodiments, the multi-parameter water quality online monitoring system further includes a flow meter module 81 for detecting the volume of the water sample discharged by the system, the water inlet of the flow meter module 81 is connected with the light measuring outlet of the light measuring module 6 through a pipeline, the water outlet of the flow meter module 81 is connected with the water outlet 12 of the system through a pipeline, and the flow meter module 81 is electrically connected with the controller module 8.
As shown in fig. 1 and 3, in some embodiments, the multi-parameter water quality online monitoring system further includes a touch display screen 83, the touch display screen 83 being electrically connected to the controller, the touch display screen 83 being configured to interact with a user.
The touch display screen 83 can display the water quality parameters of the water sample detected by the electrode measuring module 4 and the light measuring module 6, and can also display the working conditions of the liquid level meter 25, the flowmeter, the cleaning and calibrating module 5, the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the fourth electromagnetic valve 74 and the diaphragm pump module 3. The user can give the instruction to the controller module 8 through the touch display screen 83, control the work of the cleaning calibration module 5, the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the fourth electromagnetic valve 74 and the diaphragm pump module 3, for example, through giving the instruction to the controller module 8, set the cleaning calibration times, make the controller control the cleaning calibration module 5 to carry out the cleaning calibration of the set times, thereby the residue in the last measurement can be better removed, the measurement error of the light measurement module 6 is reduced, and the accuracy of the data is ensured.
As shown in fig. 1 to 4, in some embodiments, the multi-parameter water quality online monitoring system further includes a water leakage detection module 82, configured to detect whether water is accumulated in the cabinet 1, where the water leakage detection module 82 is electrically connected to the controller module 8, when a water leakage occurs in a component installed in the cabinet 1, a water sample is accumulated in the cabinet 1, a liquid level is gradually raised, the water leakage detection module 82 is triggered, and after receiving a signal, the controller stops all measurement actions and displays water leakage alarm information on the touch display screen 83; the liquid level in the cabinet 1 continues to rise and flows out from the system overflow port 13 of the cabinet 1, so that the interior of the cabinet 1 is not completely submerged by the water sample.
It should be noted that, the water leakage detection module 82 may be a float switch, where the float switch is connected to the controller, when some part in the system leaks, the water sample will accumulate in the system, the liquid level will rise gradually, the float switch is triggered, the controller will stop all measurement actions after receiving the signal, and the water leakage alarm information is displayed on the touch display 83. The liquid level in the system continues to rise and then flows out from the overflow port, so that the system is ensured not to be completely submerged by the water sample.
As shown in fig. 2, 4 and 7, in some embodiments, the electrode measurement module 4 includes one or more different types of electrodes, and a corresponding number of electrode flow channels 44, the electrodes are mounted in the electrode flow channels 44, an electrode measurement water inlet 45 is disposed at the bottom of the electrode flow channels 44, and an electrode measurement water outlet 46 is disposed at the side of the electrode flow channels 44;
wherein the types of the electrodes comprise residual chlorine electrode 42, PH electrode 41 and conductivity electrode 43;
there is an embodiment that the electrode measuring module 4 only comprises one electrode, the electrode measuring water inlet 45 is connected with the diaphragm water outlet of the diaphragm pump module 3 through the second electromagnetic valve 72, and the electrode measuring water outlet 46 is connected with the light measuring water inlet through a pipeline;
there is an embodiment that the electrode measuring module 4 comprises two different types of electrodes, two electrode flow grooves 44 are sequentially connected in series, wherein an electrode measuring water inlet 45 of one electrode flow groove 44 is connected with a diaphragm water outlet of the diaphragm pump module 3 through a second electromagnetic valve 72, and an electrode measuring water outlet 46 of the other electrode flow groove 44 is connected with an optical measuring water inlet through a pipeline;
there is an embodiment that the electrode measuring module 4 includes three different types of electrodes, the three electrode flow channels 44 are sequentially connected in series, the electrode measuring water inlet 45 of the first electrode flow channel 44 is connected with the diaphragm water outlet of the diaphragm pump module 3 through the second electromagnetic valve 72, and the electrode measuring water outlet 46 of the last electrode flow channel 44 is connected with the light measuring water inlet through a pipeline.
Chlorine is added, and is still used by more than 80% of water plants worldwide as an effective sterilization and disinfection means. A certain amount of residual chlorine must be maintained in municipal tap water to ensure the microbial indicator safety of the drinking water.
However, when chlorine reacts with organic acids, many carcinogenic byproducts such as trihalomethanes and the like are produced. Over a certain amount of chlorine, the chlorine can generate a lot of harm to human bodies, and has unpleasant smell commonly known as 'bleaching powder smell'. Residual chlorine content data in the water sample can thus be measured by residual chlorine electrode 42 and fed back to controller module 8.
The pH value of the drinking water is between 6.5 and 8.5, and the optimal value of normal drinking water is 7.4. The PH data of the water sample can thus be measured by the PH electrode 41 and fed back to the controller module 8.
Conductivity of a water sample is an important indicator for measuring the salt-containing component, ion-containing component, impurity-containing component, and the like of water. Conductivity data of the water sample can thus be measured by the conductivity electrode 43 and fed back to the controller.
After receiving the data, the controller can send the data to the touch display screen 83, and a user can obtain the water quality parameters of the water sample by looking up the touch display screen 83.
It should be noted that, when the electrode measuring module 4 includes three different types of electrodes, the water sample passes through the residual chlorine electrode 42, then the PH electrode 41, and finally the conductivity electrode 43 when the water sample is measured.
As shown in fig. 8, the invention also discloses a multi-parameter water quality on-line monitoring method, which comprises a sampling cleaning calibration process and a sampling measurement process;
the sampling, cleaning and calibrating process comprises the following steps:
step one: the user gives a sampling measurement instruction to the controller, the controller module opens the first electromagnetic valve, and the sampling module opens sampling;
step two: the liquid level meter monitors the sampling water level in the sampling module, when the sampling water level reaches the highest liquid level, the liquid level meter sends a signal to the controller module, and the controller module closes the first electromagnetic valve to finish sampling;
step three: after the sampling is finished, the controller module starts the diaphragm pump module to pump the water sample in the sampling module and convey the water sample to the self-cleaning calibration module;
step four: pure water is generated from the cleaning and calibrating module, the controller module opens the third electromagnetic valve, the pure water washes the ultraviolet visible light module, and the controller module reads the data of the ultraviolet visible light module and performs zero calibration;
step five: the controller opens a fourth electromagnetic valve connected with the sewage outlet of the cleaning and calibrating module to carry out sewage discharge, and after the sewage discharge is completed, the controller closes the fourth electromagnetic valve;
step six: finishing cleaning and zeroing;
the sampling measurement process comprises the following steps:
step seven: repeating the first and second steps, and after sampling, starting the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve by the controller module, extracting a water sample in the sampling module, and sequentially introducing the water sample into the electrode measuring module and the light measuring module;
step eight: the electrode measuring module and the light measuring module monitor water samples, and the controller reads data of the electrode and the ultraviolet-visible light module to finish measuring water quality parameters;
step nine: and closing the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve, and waiting for a next sampling measurement instruction by the controller.
The water sample is collected through the sampling module, and when the water sample needs to be measured, the water sample collected by the sampling module is extracted through the diaphragm pump module, so that the risk of water backflow of monitoring is avoided. Compared with the conventional chemical analysis method, the method has the advantages that the electrode measuring module and the light measuring module are used for detecting the water sample in the measuring process, the measuring period is shortened, the chemical reagent is not needed, the running cost is reduced, meanwhile, before the measurement, the light measuring module is cleaned and calibrated by the pure water generated by the cleaning and calibrating module, so that the accuracy of water quality parameter data is improved, the chemical reagent is not used in the detecting process, and the cleaning and calibrating module cleans part of the water sample into the pure water to clean the light measuring module, and therefore, the waste and pollution of water resources are not caused.
Further, in the process of sampling, cleaning and calibrating, the user can selectively give the controller module instructions for repeatedly executing the steps three to five.
Through carrying out step three and step five many times to can be better with the residual water sample clean up of system when measuring the last time, and then reduce the measuring error of light measurement module, guarantee the accuracy of data. If the system is moved to the next measuring point, the initial use can manually wash the default sampling for 1 time and increase the default sampling for 3 times, so as to ensure that the residual of sampling measurement before the calibration module can be washed away by the light measuring module.
Further, in the steps three to five repeatedly executed, the liquid level meter monitors the sampling water level in the sampling module, and when the sampling water level reaches the lowest liquid level, the liquid level meter sends a signal to the controller module, and the controller module executes the steps one to two.
Because the cleaning calibration module cleans the light measurement module for many times, more water samples can be consumed, the water samples can be insufficient for subsequent measurement, therefore, the sampling water level in the sampling module is monitored through the liquid level meter, when the sampling water level reaches the minimum liquid level, the liquid level meter sends a signal to the controller module, and the controller module executes the steps one to two, so that the sufficiency of the water samples is ensured.
Specifically, in the sampling measurement process, the optical measurement module uses a multi-wavelength technology to measure a water sample, and the optical measurement module emits ultraviolet light wavelength to measure organic parameters based on a spectrum absorption method; the light measuring module emits visible light wavelength and measures chromaticity parameters based on a spectrum absorption method; the light measurement module emits visible light wavelength, and turbidity parameters are measured based on a 90-degree scattering method.
The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a multiparameter water quality on-line monitoring system, includes the rack, its characterized in that, rack internally mounted has:
the sampling module is used for extracting and storing water samples of sampling points, and a sampling water inlet of the sampling module is connected with an external water inlet pipe through a first electromagnetic valve;
the diaphragm pump module is used for extracting the water sample stored by the sampling module, and a diaphragm water inlet of the diaphragm pump module is connected with a sampling water outlet of the sampling module through a pipeline;
the electrode measuring module is used for detecting the water sample, and an electrode measuring water inlet of the electrode measuring module is connected with a diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve;
the cleaning and calibrating module is used for processing the water sample to generate pure water, a cleaning and calibrating water inlet of the cleaning and calibrating module is connected with a diaphragm water outlet of the diaphragm pump module through a pipeline, and a sewage outlet of the cleaning and calibrating module is connected with a system water outlet through a fourth electromagnetic valve;
the light measuring module is used for detecting the water sample, a light measuring water inlet of the light measuring module is connected with an electrode measuring water outlet of the electrode measuring module through a pipeline, a light measuring water inlet of the light measuring module is connected with a cleaning and calibrating water outlet of the cleaning and calibrating module through a third electromagnetic valve, and a light measuring water outlet of the light measuring module is connected with a system water outlet through a pipeline;
and the control module is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the diaphragm pump module, the electrode measuring module and the light measuring module.
2. The multi-parameter online water quality monitoring system of claim 1, wherein the sampling module comprises:
the sampling tank is used for storing the collected water sample, and the top and the bottom of the sampling tank are respectively provided with the sampling water inlet and the sampling water outlet; the sampling tank is also provided with an air inlet and a sampling overflow port, and the air inlet is arranged at the top of the sampling tank and is connected with the pneumatic pump through a one-way air inlet valve; the sampling overflow port is arranged at the side part of the sampling tank and is connected with the system water outlet through a one-way valve;
the liquid level meter is used for monitoring the sampling water level in the sampling tank, the liquid level meter is installed in the sampling tank, and the liquid level meter is electrically connected with the controller.
3. The multi-parameter online water quality monitoring system of claim 1, further comprising:
the water sample volume measuring device comprises a flow meter module, a controller module and a controller module, wherein the flow meter module is used for detecting the volume of a water sample discharged by the system, a water inlet of the flow meter module is connected with a light measuring outlet of the light measuring module through a pipeline, a water outlet of the flow meter module is connected with a water outlet of the system through a pipeline, and the flow meter module is electrically connected with the controller module.
4. The multi-parameter online water quality monitoring system of claim 1, further comprising:
the touch display screen is electrically connected with the controller and used for interacting with a user.
5. The multi-parameter online water quality monitoring system of claim 4, further comprising:
the water leakage detection module is used for detecting whether water is accumulated in the cabinet or not, the water leakage detection module is electrically connected with the controller module, when water leakage occurs to a component arranged in the cabinet, the water sample can be accumulated in the cabinet, the liquid level can be gradually raised, the water leakage detection module is triggered, the controller can stop all measurement actions after receiving signals, and water leakage alarm information is displayed on the touch display screen; the liquid level in the cabinet is continuously increased and flows out from the system overflow port of the cabinet, so that the interior of the cabinet is ensured not to be completely submerged by the water sample.
6. The multi-parameter online water quality monitoring system according to claim 1, wherein the electrode measuring module comprises one or more electrodes of different types and a corresponding number of electrode flow grooves, the electrodes are installed in the electrode flow grooves, the bottom of the electrode flow grooves is provided with the electrode measuring water inlet, and the side parts of the electrode flow grooves are provided with the electrode measuring water outlet;
wherein the types of the electrodes comprise residual chlorine electrodes, PH electrodes and conductivity electrodes;
when the electrode measuring module only comprises one electrode, the electrode measuring water inlet is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the electrode measuring water outlet is connected with the light measuring water inlet through a pipeline;
when the electrode measuring module comprises two electrodes of different types, the two electrode flow grooves are sequentially connected in series, wherein the electrode measuring water inlet of one electrode flow groove is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the electrode measuring water outlet of the other electrode flow groove is connected with the light measuring water inlet through a pipeline;
when the electrode measuring module comprises three electrodes of different types, the three electrode circulating grooves are sequentially connected in series, the first electrode measuring water inlet of the electrode circulating groove is connected with the diaphragm water outlet of the diaphragm pump module through a second electromagnetic valve, and the last electrode measuring water outlet of the electrode circulating groove is connected with the light measuring water inlet through a pipeline.
7. The multi-parameter water quality on-line monitoring method is characterized by comprising a sampling, cleaning and calibrating process and a sampling and measuring process;
the sampling, cleaning and calibrating process comprises the following steps:
step one: the user gives a sampling measurement instruction to the controller, the controller module opens the first electromagnetic valve, and the sampling module opens sampling;
step two: the liquid level meter monitors the sampling water level in the sampling module, when the sampling water level reaches the highest liquid level, the liquid level meter sends a signal to the controller module, and the controller module closes the first electromagnetic valve to finish sampling;
step three: after the sampling is finished, the controller module starts the diaphragm pump module to pump the water sample in the sampling module and convey the water sample to the self-cleaning calibration module;
step four: pure water is generated from the cleaning and calibrating module, the controller module opens the third electromagnetic valve, the pure water washes the ultraviolet visible light module, and the controller module reads the data of the ultraviolet visible light module and performs zero calibration;
step five: the controller opens a fourth electromagnetic valve connected with the sewage outlet of the cleaning and calibrating module to carry out sewage discharge, and after the sewage discharge is completed, the controller closes the fourth electromagnetic valve;
step six: finishing cleaning and zeroing;
wherein the sampling measurement process comprises the steps of:
step seven: repeating the first and second steps, and after sampling, starting the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve by the controller module, extracting a water sample in the sampling module, and sequentially introducing the water sample into the electrode measuring module and the light measuring module;
step eight: the electrode measuring module and the light measuring module monitor water samples, and the controller reads data of the electrode and the ultraviolet-visible light module to finish measuring water quality parameters;
step nine: and closing the diaphragm pump module, the second electromagnetic valve and the third electromagnetic valve, and waiting for a next sampling measurement instruction by the controller.
8. The method according to claim 7, wherein the user can selectively issue the instructions for repeatedly executing the third to fifth steps to the controller module a plurality of times during the sampling cleaning calibration process.
9. The on-line monitoring method of multi-parameter water quality according to claim 8, wherein in the steps three to five repeatedly performed a plurality of times, the liquid level meter monitors the sampling water level in the sampling module, and when the sampling water level reaches the lowest liquid level, the liquid level meter sends a signal to the controller module, and the controller module performs the steps one to two.
10. The multi-parameter online monitoring method of water quality according to claim 7, wherein in the sampling measurement process, an optical measurement module measures a water sample by using a multi-wavelength technology, the optical measurement module emits ultraviolet light wavelength, and the organic matter parameter is measured based on a spectrum absorption method; the light measuring module emits visible light wavelength and measures chromaticity parameters based on a spectrum absorption method; the light measurement module emits visible light wavelength, and turbidity parameters are measured based on a 90-degree scattering method.
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| CN202311530626.9A CN117571946A (en) | 2023-11-16 | 2023-11-16 | Multi-parameter water quality on-line monitoring system and method |
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| CN202311530626.9A CN117571946A (en) | 2023-11-16 | 2023-11-16 | Multi-parameter water quality on-line monitoring system and method |
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