CN114965922A - Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof - Google Patents

Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof Download PDF

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Publication number
CN114965922A
CN114965922A CN202210523103.0A CN202210523103A CN114965922A CN 114965922 A CN114965922 A CN 114965922A CN 202210523103 A CN202210523103 A CN 202210523103A CN 114965922 A CN114965922 A CN 114965922A
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peristaltic pump
detection
water
digestion
digestion chamber
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陈科
张笑维
王建雨
李小伟
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Zhejiang Veelang Environment Technology Co ltd
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Zhejiang Veelang Environment Technology Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18Water
    • G01N33/1893Water using flow cells
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20Controlling water pollution; Waste water treatment

Abstract

The invention provides a small-sized multi-parameter water quality on-line monitoring system, a method and application of an integrated flow path, comprising a sample introduction flow path module, a chemical pretreatment module and a spectrum detection module, wherein the sample introduction flow path module comprises a pneumatic device, a multi-way valve, a peristaltic pump and a connecting pipeline thereof, wherein the pneumatic device, the multi-way valve and the peristaltic pump are formed by a plurality of air valves, so that effective switching, sequential sample introduction and waste discharge of a water sample to be detected, a standard solution, a chemical reagent and pure water are realized; the chemical pretreatment module comprises an ammonia nitrogen digestion chamber, a permanganate index digestion chamber and a total nitrogen/total phosphorus digestion chamber, wherein total phosphorus enters the ammonia nitrogen digestion chamber for spectrum detection and analysis after the total phosphorus and the total nitrogen are digested in the same digestion chamber. The invention realizes the synchronous measurement of four chemical module parameters, namely ammonia nitrogen, total phosphorus and total nitrogen permanganate indexes, by three digestion/colorimetric devices; therefore, multiple parameters are integrated in the integrated flow path, and the complexity of the whole detection device is reduced.

Description

Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof
Technical Field
The invention relates to the technical field of water quality monitoring, in particular to a small-sized multi-parameter water quality online monitoring system and method of an integrated flow path and application thereof.
Background
The water quality monitoring mainly comprises the steps of monitoring and measuring the types of pollutants in the water body, the concentrations and the variation trends of various pollutants, and evaluating the conditions of water quality conditions.
The water quality monitoring contents are more, and the water quality monitoring contents comprise uncontaminated and contaminated natural water, various industrial drainage water and the like. The main monitoring items of water quality monitoring include the following two categories: one is a comprehensive index reflecting the water quality conditions, such as temperature, chroma, turbidity, pH value, conductivity, suspended matters, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand and the like; the other is some toxic substances, such as phenol, cyanogen, arsenic, lead, chromium, cadmium, mercury, organic pesticides and the like. The most important thing in water quality monitoring is to objectively evaluate the water quality conditions of rivers, oceans and the like.
The traditional environmental water quality detection work mainly takes manual sampling and laboratory instrument analysis. The method has complete analysis means only in a perfect laboratory, the existing detection requirement usually requires higher monitoring frequency, and the pollution change condition is reflected by smaller sampling error, so that the method conforms to the real detection requirement. According to the existing monitoring requirements, the perfection and the striction of national corresponding policy laws and regulations, the concepts of high-quality instruments, micro-scale design, multi-parameter simultaneous measurement, modular thought and network informatization become the development trend of new-generation instruments.
Current on-line monitoring system mostly is single parameter or two parameters, and the multi-parameter needs the integration of a plurality of flow paths can realize complete detection function usually, consequently causes the whole volume of equipment too big, and it is few to be suitable for the operating mode, and the place requires highly, and the characteristics that equipment integration degree is low. And because the repeated tedious process of the sample introduction, the crossing of various reagents and the sharing of the quantitative system are easy to cause long testing process, and the stability and accuracy of the measurement are influenced.
The existing water quality detector can only detect one kind of parameters generally, if the existing water quality detector needs a plurality of controllers to control a plurality of kinds of sensors to detect a plurality of kinds of parameters, the function is single, and the observability of data is poor.
The existing water quality multi-parameter online monitoring instruments need a plurality of instruments or a plurality of instruments integrating a plurality of flow paths to complete multi-parameter measurement, and the corresponding accessory usage amount and the occupied area of equipment are large. The small multi-parameter detector disclosed by the invention has the advantages that the same digestion conditions and oxidants for total nitrogen and total phosphorus can share the same digestion chamber, so that the consumption of the digestion chamber and oxidants is reduced; the digestion and measurement of a plurality of parameters can be completed under the same flow path, the floor area of the equipment is effectively reduced, and the integrity and the mobility of the equipment are improved.
The existing multi-parameter online monitoring instrument needs repeated quantitative sampling of reagents, time superposition of multiple parameters, low detection speed and low efficiency.
As a water quality monitoring instrument for detecting various parameters, how to solve the problems of complicated detection system and large volume of the water quality monitor, and realizing the stable measurement of the miniaturization and the accuracy of the detection of the multiple parameters is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to solve the above problems, a first object of the present invention is to provide a small-sized multi-parameter online water quality monitoring system with an integrated flow path.
Therefore, the above purpose of the invention is realized by the following technical scheme:
the utility model provides a small-size multi-parameter water quality on-line monitoring system of integration flow path which characterized in that: the system comprises a sample introduction flow path module, a chemical pretreatment module and a spectrum detection module, wherein the sample introduction flow path module comprises a pneumatic device consisting of a plurality of air valves, a multi-way valve, a peristaltic pump and a connecting pipeline thereof, and realizes effective switching, sequential sample introduction and waste discharge of a water sample to be detected, a standard solution, a chemical reagent and pure water; a water sample to be detected and a chemical reagent are sent into a chemical pretreatment module by a sample introduction flow path module to carry out high-temperature high-pressure on-line digestion and spectral detection and analysis, the chemical pretreatment module comprises an ammonia nitrogen digestion chamber, a permanganate index digestion chamber and a total nitrogen/total phosphorus digestion chamber, wherein after total phosphorus and total nitrogen are digested in the same digestion chamber, the total phosphorus enters the ammonia nitrogen digestion chamber to carry out spectral detection and analysis.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: the upper ports of the ammonia nitrogen digestion chamber and the permanganate index digestion chamber are connected with a pneumatic device and a multi-peristaltic pump which are formed by a plurality of air valves, pressure relief vent openings are arranged at the same time, ammonia nitrogen, total phosphorus and permanganate reagents are accurately quantified at the same time through the multi-peristaltic pump and are sent into the corresponding digestion chambers through the pneumatic device and a second peristaltic pump which are formed by the plurality of air valves, and digestion pipes of the digestion chambers are provided with temperature control heating devices and fans.
As a preferred technical scheme of the invention: and optical fibers and spectrum detectors corresponding to the wavelengths of the detection light sources are arranged on the two sides of each digestion chamber outside the digestion tubes for spectrum detection and analysis.
As a preferred technical scheme of the invention: and after the ammonia nitrogen spectrum detection and analysis are completed, the liquid in the total nitrogen/total phosphorus digestion chamber is sent to the ammonia nitrogen digestion chamber through a second peristaltic pump to test the total phosphorus.
It is a further object of the present invention to provide a small scale multi-parameter online water quality monitoring method using the integrated flow path of the system described above.
Therefore, the invention is realized by the following technical scheme:
water samples are pumped by a first peristaltic pump and quantitatively enter an ammonia nitrogen digestion chamber, a permanganate index digestion chamber and a total nitrogen/total phosphorus digestion chamber by a second peristaltic pump, pure water is pumped by the first peristaltic pump to clean the total nitrogen/total phosphorus digestion chamber, and waste liquid is discharged by the peristaltic pump;
the ammonia nitrogen digestion chamber carries out ammonia nitrogen blank detection, an ammonia nitrogen reagent is fed in through a second peristaltic pump and starts digestion, a total nitrogen/total phosphorus digestion chamber pumps the reagent through a first peristaltic pump, total nitrogen quantitatively enters through the second peristaltic pump and starts digestion, and a permanganate index digestion chamber enters a permanganate reagent through the second peristaltic pump and starts digestion;
the ammonia nitrogen digestion chamber finishes ammonia nitrogen detection, waste liquid is discharged through a peristaltic pump, pure water is pumped through a second peristaltic pump to clean the ammonia nitrogen digestion chamber, and the waste liquid is discharged through the peristaltic pump again; finishing total nitrogen color comparison in the total nitrogen/total phosphorus digestion chamber, pumping digestion liquid into the ammonia nitrogen digestion chamber through a second peristaltic pump, carrying out total phosphorus blank detection, and feeding a total phosphorus reagent through the second peristaltic pump to carry out total phosphorus color comparison;
pure water is pumped by a second peristaltic pump to clean the total nitrogen/total phosphorus digestion chamber, and the total nitrogen blank detection is completed; permanganate index is cleared up the room and is accomplished the permanganate color comparison and through first peristaltic pump extraction waste liquid discharge second multi-way valve waste liquid department, extract the pure water through first peristaltic pump and wash ammonia nitrogen and clear up the room and accomplish the blank detection of permanganate, extract the waste liquid through second peristaltic pump once more and discharge second multi-way valve waste liquid department, ammonia nitrogen clears up the room and accomplishes total phosphorus and detect, arrange the waste liquid through the peristaltic pump outward, extract the pure water through first peristaltic pump and arrange the waste liquid through the peristaltic pump outward, chemical module flow measurement finishes.
A third object of the present invention is to provide an application of the small-sized multi-parameter water quality on-line monitoring system using the integrated flow path used in the system described above.
Therefore, the invention is realized by the following technical scheme:
the water quality monitoring system comprises a case, a preposed waterway, a water distribution unit, a detection module, a data acquisition and transmission unit and a control unit, wherein the preposed waterway acquires a required water sample from a water body to be monitored for detection and analysis; the water distribution unit distributes the water sample collected by the front waterway to the detection module for detection and analysis; the detection module comprises a chemical detection module and a conventional five-parameter detection pool, a data acquisition and transmission unit acquires and transmits detection data and operation parameters to an upper computer in a preset mode, the data acquisition and transmission unit acquires and transmits the detection data and the operation parameters to the upper computer through transmission, the control unit comprises a touch screen and a single-chip microcomputer control system, the touch screen displays all detection parameters in real time and operates and detects through the single-chip microcomputer control system, the machine box is arranged in layers, a preposed water path is arranged at the lowest layer, the conventional five-parameter detection pool and the chemical detection module are sequentially arranged on the preposed water path, and the preposed water path penetrates through laminates of all layers through a water distribution unit to provide detection water samples for the five-parameter detection pool and the chemical detection module.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: the front water path comprises a water taking pump and a water taking pipeline, the water taking pipeline is connected with the water distribution unit, and the water samples of the five-parameter detection pool and the chemical detection module are subjected to sample introduction, emptying and cleaning.
As a preferred technical scheme of the invention: the machine case is provided with an air conditioner for adjusting the internal environment temperature of the machine case, and an air outlet of the air conditioner is communicated with the side wall of the machine case.
As a preferred technical scheme of the invention: the touch screen is arranged at the upper end of the front cover of the case and is connected with the single chip microcomputer control system through a circuit, and the single chip microcomputer control system is arranged on the uppermost layer of the case.
The invention has the following technical effects:
(1) the synchronous measurement of four chemical module parameters, namely ammonia nitrogen, total phosphorus and total nitrogen permanganate indexes can be realized through three digestion/colorimetric devices; therefore, multiple parameters are integrated in the integrated flow path, and the complexity of the whole detection device is reduced.
(2) The integrated flow path has the functions of simultaneously accurately and stably measuring the permanganate index, the ammonia nitrogen, the total nitrogen and the total phosphorus, the integration degree of the equipment is improved, meanwhile, the equipment has the conventional five-parameter measuring function, the integral integration degree is high, the occupied area of the equipment is small, and the application scene and the working condition are wider.
(3) The integrated flow path has high detection speed, and various reagents are quantitatively finished at one time, so that the multi-parameter test time is shortened. The peristaltic pump air-pushing system ensures a small dead volume and an ultrahigh synchronization rate, ensures the stability and accuracy of quantitative sample injection, and finally ensures the accuracy and stability of test data.
(4) The small-sized multi-parameter water quality on-line monitoring system of the integrated flow path is applied to a small-sized outdoor water quality monitoring station and is used as a chemical detection module of the small-sized outdoor water quality monitoring station. The water body carries out five-parameter turbidity, conductivity, dissolved oxygen, temperature, pH's detection through leading water route promptly to it gets into integration chemical module to detect to pump water through the peristaltic pump, ammonia nitrogen, total phosphorus, total nitrogen, permanganate index accomplish synchronous detection in same flow path system, wherein the color comparison is accomplished in independently clearing up the room to the permanganate index, total phosphorus, total nitrogen is accomplished in same room of clearing up and is cleared up, and total nitrogen accomplishes the color comparison, and total phosphorus and ammonia nitrogen after clearing up share the same color comparison device, accomplish the ammonia nitrogen earlier and clear up, carry out the color comparison of total phosphorus after the color comparison.
(5) The small-sized multi-parameter water quality online monitoring system with the integrated flow path has the advantages that the water sample pipe, the pure water pipe and the waste liquid pipe are shared, the number of water samples in various water quality analyses is reduced, the total amount of waste liquid is reduced, and the consumption of consumables during maintenance is reduced. Each chemical module supports independent operation detection, avoids reagent interference, and promotes detection accuracy and detection combination flexibility of equipment.
(6) The optical fiber (total nitrogen xenon lamp), the spectrum detector and the digestion system in each digestion system are integrated, the digestion process is convenient, the measurement is completed in the digestion system, and the measurement time and the flow path space are saved.
(7) The device has the functions of testing the five-parameter probe and the chemical module, the maintenance of each detection function is centralized and convenient, the replacement and maintenance of pure water, waste liquid and reagents are more centralized, the convenience of device management is improved, and the maintenance and starting speed of device detection is increased.
(8) The quantitative sampling mode has the advantages of simple structure, good repeatability and stability, convenient replacement, low maintenance cost and wider applicable platform of the quantitative mode.
Drawings
FIG. 1 is a flow diagram of a small multi-parameter water quality on-line monitoring system of the integrated flow path of the present invention;
FIG. 2 is an open front view of a cabinet of a small outdoor water quality monitoring station of the present invention;
FIG. 3 is a rear view of the small outdoor water quality monitoring station of the present invention with the rear cover of the cabinet open;
in the figure, a front waterway 1; a water intake pipe 102; a water distribution unit 2; a conventional five-parameter detection cell 3; a chemical detection module 4; a touch screen 5; a chassis 6; a peristaltic pump 7; an air conditioner 8; a refrigerator 9; an air pump 10; a single chip microcomputer control system 11; the system comprises a multi-peristaltic pump 12, a pneumatic device 13 consisting of multi-way air valves, an ammonia nitrogen digestion chamber 14, a permanganate index digestion chamber 15, a total nitrogen/total phosphorus digestion chamber 21, a first peristaltic pump 16, a second peristaltic pump 17 (air pump), a second peristaltic pump 18, a first multi-way valve 19, a second multi-way valve 20 and a liquid level meter 22.
Detailed Description
The invention is described in further detail with reference to the figures and specific embodiments.
The invention relates to a small-sized multi-parameter water quality on-line monitoring system of an integrated flow path, as shown in figure 1, which comprises a sample introduction flow path module, a chemical pretreatment module and a spectrum detection module, wherein the sample introduction flow path module comprises a pneumatic device, a multi-way valve, a peristaltic pump and a connecting pipeline thereof, wherein the pneumatic device is formed by a plurality of air valves, and the pneumatic device, the multi-way valve, the peristaltic pump and the connecting pipeline thereof realize effective switching, sequential sample introduction and waste discharge of a water sample to be detected, a standard solution, a chemical reagent and pure water; a water sample to be detected and a chemical reagent are sent into a chemical pretreatment module by a sample introduction flow path module to carry out high-temperature high-pressure on-line digestion and spectral detection and analysis, the chemical pretreatment module comprises an ammonia nitrogen digestion chamber 14, a permanganate index digestion chamber 15 and a total nitrogen/total phosphorus digestion chamber 21, wherein after total phosphorus and total nitrogen are digested in the same digestion chamber, the total phosphorus enters the ammonia nitrogen digestion chamber to carry out spectral detection and analysis.
The invention relates to a small-sized multi-parameter water quality online monitoring system of an integrated flow path, wherein the flow path comprises a pneumatic device consisting of a plurality of air valves, a digestion chamber and an air blowing pipeline consisting of a multi-peristaltic pump air valve; the second peristaltic pump 16 is connected with a first multi-way valve 19, mainly serves as a total nitrogen reagent and waste liquid channel, and is connected with the lower ends of the ammonia nitrogen digestion chamber 14, the permanganate index digestion chamber 15 and the total nitrogen/total phosphorus digestion chamber 21, and the common end of a second multi-way valve 20 is connected with the first multi-way valve 19, mainly serves as a water sample, a standard liquid, pure water and a waste liquid channel; the second multi-way valve 20 to the liquid level meter 21 at the second peristaltic pump 17 function as a dosing function for the liquid in the multi-way valve.
The upper ports of the ammonia nitrogen digestion chamber 14 and the permanganate index digestion chamber 15 are connected with a pneumatic device 13 consisting of a plurality of air valves and a multi-connection peristaltic pump 12, and pressure relief vent openings are arranged at the same time; ammonia nitrogen, total phosphorus and permanganate reagents are simultaneously and accurately quantified through a multi-peristaltic pump 12, and are sent into corresponding digestion chambers through air valves in a pneumatic device 13 consisting of a plurality of air valves and a second peristaltic pump 17, wherein each digestion chamber digestion tube is provided with a temperature control heating device and a fan, and simultaneously, optical fibers and a spectrum detector which correspond to the wavelength of a detection light source are arranged on the two sides outside the digestion tube.
The total nitrogen is completely digested in the total nitrogen/total phosphorus digestion chamber 21 because the oxidant and the digestion condition are the same as the total phosphorus, the total nitrogen is tested, then the total nitrogen is discharged into the ammonia nitrogen digestion chamber 14 through the second peristaltic pump 17 to test the total phosphorus, meanwhile, because the ammonia nitrogen test flow is faster and the wavelength of the light source of the main channel is consistent with the total phosphorus, the ammonia nitrogen test flow can be executed before the total phosphorus is digested and enters the ammonia nitrogen digestion chamber 14, and meanwhile, in order to prevent the reagent from influencing the quantitative loop from the second multi-way valve 20 to the second peristaltic pump 17, the waste liquid in the ammonia nitrogen digestion chamber 14 is directly discharged through the peristaltic pump 18.
According to the invention, the ammonia nitrogen digestion chamber increases direct discharge and improves the operation stability of the equipment, the peristaltic pump is arranged in the ammonia nitrogen digestion chamber according to the mutual influence of the oxidation reduction action among reagents, so that the reaction reagents and the cleaning waste liquid from an ammonia nitrogen test and a total phosphorus test can be directly emptied, the mutual influence among parameters is avoided without passing through a public quantitative ring, the using amount of cleaning liquid is reduced, the testing time is saved, and meanwhile, the accurate quantitative mode of taking a multi-connected pump-gas pushing as a core is combined, so that the operation stability and the accuracy of the equipment are ensured.
The invention discloses a small-sized multi-parameter online measuring method of an integrated flow path, which comprises the following steps:
feeding the reagent (ammonia nitrogen, total phosphorus and permanganate) into a multi-connected peristaltic pump 12, and emptying each digestion tube; a water sample is extracted through a first peristaltic pump 16, quantitatively enters an ammonia nitrogen digestion chamber 14, a permanganate index digestion chamber 15 and a total nitrogen/total phosphorus digestion chamber 21 through a second peristaltic pump 17, pure water is extracted through the first peristaltic pump 16 to clean the total nitrogen/total phosphorus digestion chamber 21, and waste liquid is discharged through a peristaltic pump 18.
The ammonia nitrogen digestion chamber 14 performs ammonia nitrogen blank detection, ammonia nitrogen reagent enters through the second peristaltic pump 17 and starts digestion, the total nitrogen/total phosphorus digestion chamber 21 extracts the reagent through the first peristaltic pump 16, the total nitrogen quantitatively enters through the second peristaltic pump 17 and starts digestion, and the permanganate index digestion chamber 15 enters the permanganate reagent through the second peristaltic pump 17 and starts digestion.
The ammonia nitrogen digestion chamber 14 completes ammonia nitrogen detection, waste liquid is discharged through a peristaltic pump 18, pure water is extracted through a second peristaltic pump 17 to clean the ammonia nitrogen digestion chamber 14, and the waste liquid is discharged through the peristaltic pump 18 again; and (3) finishing total nitrogen color comparison in the total nitrogen/total phosphorus digestion chamber 21, pumping digestion liquid into the ammonia nitrogen digestion chamber 14 through a second peristaltic pump 17, carrying out total phosphorus blank detection, and feeding a total phosphorus reagent through the second peristaltic pump 17 for total phosphorus color comparison.
Pure water is pumped by a second peristaltic pump 17 to clean the total nitrogen/total phosphorus digestion chamber 21, and the total nitrogen blank detection is completed; permanganate index is cleared up room 15 and is accomplished the permanganate color comparison and extract the waste liquid through first peristaltic pump 16 and discharge into second multi-way valve 20 waste liquid department, extract pure water through first peristaltic pump 16 and wash ammonia nitrogen and clear up room 14 and accomplish the blank detection of permanganate, draw the waste liquid through second peristaltic pump 17 once more and discharge into second multi-way valve 20 waste liquid department, ammonia nitrogen clears up room 14 and accomplishes total phosphorus and detect, discharge the waste liquid through peristaltic pump 18, extract the pure water through first peristaltic pump 16 and discharge the waste liquid through peristaltic pump 18.
The invention relates to a small-sized multi-parameter water quality on-line monitoring system and a method of an integrated flow path, which utilize the same oxidant and digestion conditions of total phosphorus and total nitrogen to realize that the total phosphorus and the total nitrogen share a digestion tube of the same digestion chamber, simultaneously utilize the characteristic that the testing flow of ammonia nitrogen is faster and the characteristic that the wavelength of a main channel light source of the ammonia nitrogen is consistent with that of the total phosphorus, utilize the total phosphorus and the ammonia nitrogen to share the same spectrum detection module, realize that three flow paths carry out chemical pretreatment and spectrum analysis on water samples with four water quality parameters, and simplify a sample introduction flow path module, a chemical pretreatment module and a spectrum detection module of small-sized multi-parameter water quality on-line monitoring system equipment of the integrated flow path; the usage amount of water samples and reagents is reduced, the water quality monitoring cost is reduced, and the waste discharge cost and the subsequent waste water treatment cost are also reduced; the invention discloses a small multi-parameter water quality online monitoring system of an integrated flow path. According to the invention, the integration of the control system of the water quality analysis module is realized, and the control system of the water quality analysis module is set to be one, so that the three digestion module units can be simultaneously controlled to measure the high-manganese-acid-salt index, ammonia nitrogen, total nitrogen and total phosphorus, and the integration degree of the integrated flow path equipment is improved; through setting the script, can realize that the interlude moves between each parameter of integration flow path, when having saved multi-parameter measurement time, has kept the independence that single parameter accurately measured again.
Compared with multiple parameters, the integrated flow path with the multi-pump-air-pushing technology as the core has the advantages of high integration degree of the system, high detection speed, one-time quantitative completion of multiple reagents and reduction of multi-parameter test time, and the synchronous measurement function of multiple parameters can be realized through one flow path.
According to the small-sized multi-parameter water quality online monitoring system and method of the integrated flow path, the sampling precision is guaranteed in a gas pushing mode; due to the shunt sample introduction of the multi-connection peristaltic pump, the reagent liquid mixing risk and interference are avoided, and the multi-connection peristaltic pump is suitable for detection of various parameters; based on the multi-connection peristaltic pump-air pump quantitative system, the synchronous rate is ensured, and the stability and the accuracy of the test are ensured.
According to the small-sized multi-parameter water quality online monitoring system and method of the integrated flow path, reagents are synchronously quantified through the synchronous multi-peristaltic pump, and the reagent pipelines corresponding to each air impeller are independent, so that the replacement of redundant reagents is avoided, and the overall reagent consumption is reduced.
According to the small-sized multi-parameter water quality on-line monitoring system and method of the integrated flow path, waste liquid is directly discharged in the ammonia nitrogen digestion chamber according to the mutual influence of the redox effect among the reagents, the mutual influence among all parameters is avoided through a quantitative ring, and the stability and the accuracy of the operation of equipment are ensured.
The invention discloses application of a small-sized multi-parameter water quality on-line monitoring system of an integrated flow path, which is applied to a small-sized outdoor water quality monitoring station and is used as a chemical detection module of the small-sized outdoor water quality monitoring station.
A small outdoor water quality monitoring station applied to a small multi-parameter water quality online monitoring system of an integrated flow path comprises a case, a preposed waterway, a water distribution unit, a detection module, a data acquisition and transmission unit and a control unit, wherein the preposed waterway acquires a required water sample from a water body to be monitored for detection and analysis; the water distribution unit distributes the water sample collected by the front waterway to the detection module for detection and analysis; the detection module comprises a chemical detection module and a conventional five-parameter detection pool, a data acquisition and transmission unit acquires and transmits detection data and operation parameters to an upper computer in a preset mode, the data acquisition and transmission unit acquires and transmits the detection data and the operation parameters to the upper computer through transmission, the control unit comprises a touch screen and a single-chip microcomputer control system, the touch screen displays all detection parameters in real time and operates and detects through the single-chip microcomputer control system, the machine box is arranged in layers, a preposed water path is arranged at the lowest layer, the conventional five-parameter detection pool and the chemical detection module are sequentially arranged on the preposed water path, and the preposed water path penetrates through laminates of all layers through a water distribution unit to provide detection water samples for the five-parameter detection pool and the chemical detection module.
In the invention, the conventional five parameters in the conventional five-parameter detection cell 3 refer to pH, conductivity, dissolved oxygen, turbidity and temperature.
In the invention, the front water channel, the conventional five-parameter detection pool and the chemical detection module are installed in the case 6 in a layered manner in a partition mode, and the modular design is convenient for installation and disassembly. Leading water route 1 sets up at quick-witted case 6 bottommost, and the upper end divides two-layer to set up chemical detection module 4 and conventional five parameter detection pond 3, provides quick, the easy to assemble detection module according to the demand, and reasonable subregion is arranged and is made the shared area in the detection station horizontal direction little, has realized the miniaturization of water quality testing station, has integrated.
In the invention, the preposed waterway 1 comprises a water taking pump and a water taking pipeline 102, the water taking pipeline 102 is connected with the water distribution unit 2, and samples, empties and cleans water samples of the five-parameter detection pool 3 and the chemical monitoring module 4.
The case 6 is provided with an air conditioner 8 for adjusting the internal environment temperature of the case 6, and an air outlet of the air conditioner 8 is communicated through the side wall of the case 6.
The touch screen 5 is arranged at the upper end of the front cover of the case 6, the touch screen 5 is connected with the single chip microcomputer control system through a circuit, and the single chip microcomputer control system is arranged on the uppermost layer of the case 6.
In the invention, the water distribution unit 4 comprises a peristaltic pump 7 arranged on the side wall of the case 6, and the peristaltic pump is provided with an air pump 10 for pushing a chemical reagent to be sent into the chemical detection module 4 through the peristaltic pump.
The refrigerator 9 is also arranged for storing reagent required by chemical detection, and the refrigerator 9 is arranged in the case 6 close to the back and is arranged at the lower end of the chemical detection module 4.
The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path is applied to a small-sized outdoor water quality monitoring station, and is used as a chemical detection module of the small-sized outdoor water quality monitoring station.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.

Claims (10)

1. The utility model provides a small-size multi-parameter water quality on-line monitoring system of integration flow path which characterized in that: the system comprises a sample introduction flow path module, a chemical pretreatment module and a spectrum detection module, wherein the sample introduction flow path module comprises a pneumatic device consisting of a plurality of air valves, a multi-way valve, a peristaltic pump and a connecting pipeline thereof, and realizes effective switching, sequential sample introduction and waste discharge of a water sample to be detected, a standard solution, a chemical reagent and pure water; a water sample to be detected and a chemical reagent are sent into a chemical pretreatment module by a sample introduction flow path module to carry out high-temperature high-pressure on-line digestion and spectral detection and analysis, the chemical pretreatment module comprises an ammonia nitrogen digestion chamber, a permanganate index digestion chamber and a total nitrogen/total phosphorus digestion chamber, wherein after total phosphorus and total nitrogen are digested in the same digestion chamber, the total phosphorus enters the ammonia nitrogen digestion chamber to carry out spectral detection and analysis.
2. The small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 1, wherein: the upper ports of the ammonia nitrogen digestion chamber and the permanganate index digestion chamber are connected with a pneumatic device and a multi-peristaltic pump which are formed by a plurality of air valves, pressure relief vent openings are arranged at the same time, ammonia nitrogen, total phosphorus and permanganate reagents are accurately quantified at the same time through the multi-peristaltic pump and are sent into the corresponding digestion chambers through the pneumatic device and a second peristaltic pump which are formed by the plurality of air valves, and digestion pipes of the digestion chambers are provided with temperature control heating devices and fans.
3. The small-sized multi-parameter water quality on-line monitoring system of the integrated flow path according to claim 2, characterized in that: and optical fibers and spectrum detectors corresponding to the wavelengths of the detection light sources are arranged on the two sides of each digestion chamber outside the digestion tubes for spectrum detection and analysis.
4. The small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 3, wherein: and after the ammonia nitrogen spectrum detection and analysis are completed, the liquid in the total nitrogen/total phosphorus digestion chamber is sent to the ammonia nitrogen digestion chamber through a second peristaltic pump to test the total phosphorus.
5. A small-sized multi-parameter water quality on-line monitoring method using the integrated flow path of any one of claims 1 to 4, characterized in that: water samples are pumped by a first peristaltic pump and quantitatively enter an ammonia nitrogen digestion chamber, a permanganate index digestion chamber and a total nitrogen/total phosphorus digestion chamber by a second peristaltic pump, pure water is pumped by the first peristaltic pump to clean the total nitrogen/total phosphorus digestion chamber, and waste liquid is discharged by the peristaltic pump;
the ammonia nitrogen digestion chamber carries out ammonia nitrogen blank detection, an ammonia nitrogen reagent is fed in through a second peristaltic pump and starts digestion, a total nitrogen/total phosphorus digestion chamber pumps the reagent through a first peristaltic pump, total nitrogen quantitatively enters through the second peristaltic pump and starts digestion, and a permanganate index digestion chamber enters a permanganate reagent through the second peristaltic pump and starts digestion;
the ammonia nitrogen digestion chamber finishes ammonia nitrogen detection, waste liquid is discharged through a peristaltic pump, pure water is extracted through a second peristaltic pump to clean the ammonia nitrogen digestion chamber, and the waste liquid is discharged through the peristaltic pump again; finishing total nitrogen color comparison in the total nitrogen/total phosphorus digestion chamber, pumping digestion liquid into the ammonia nitrogen digestion chamber through a second peristaltic pump, carrying out total phosphorus blank detection, and feeding a total phosphorus reagent through the second peristaltic pump to carry out total phosphorus color comparison;
pure water is pumped by a second peristaltic pump to clean the total nitrogen/total phosphorus digestion chamber, and the total nitrogen blank detection is completed; permanganate index is cleared up the room and is accomplished the permanganate color comparison and through first peristaltic pump extraction waste liquid discharge second multi-way valve waste liquid department, extract the pure water through first peristaltic pump and wash ammonia nitrogen and clear up the room and accomplish the blank detection of permanganate, extract the waste liquid through second peristaltic pump once more and discharge second multi-way valve waste liquid department, ammonia nitrogen clears up the room and accomplishes total phosphorus and detect, arrange the waste liquid through the peristaltic pump outward, extract the pure water through first peristaltic pump and arrange the waste liquid through the peristaltic pump outward, chemical module flow measurement finishes.
6. The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path in any claim of 1 to 4 is applied to a small-sized outdoor water quality monitoring station and used as a chemical detection module of the small-sized outdoor water quality monitoring station.
7. The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 6, is characterized in that: the water quality monitoring system comprises a case, a preposed waterway, a water distribution unit, a detection module, a data acquisition and transmission unit and a control unit, wherein the preposed waterway acquires a required water sample from a water body to be monitored for detection and analysis; the water distribution unit distributes the water sample collected by the front waterway to the detection module for detection and analysis; the detection module comprises a chemical detection module and a conventional five-parameter detection pool, a data acquisition and transmission unit acquires and transmits detection data and operation parameters to an upper computer in a preset mode, the data acquisition and transmission unit acquires and transmits the detection data and the operation parameters to the upper computer through transmission, the control unit comprises a touch screen and a single-chip microcomputer control system, the touch screen displays all detection parameters in real time and operates and detects through the single-chip microcomputer control system, the machine box is arranged in layers, a preposed water path is arranged at the lowest layer, the conventional five-parameter detection pool and the chemical detection module are sequentially arranged on the preposed water path, and the preposed water path penetrates through laminates of all layers through a water distribution unit to provide detection water samples for the five-parameter detection pool and the chemical detection module.
8. The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 6, is characterized in that: the front water path comprises a water taking pump and a water taking pipeline, the water taking pipeline is connected with the water distribution unit, and the water samples of the five-parameter detection pool and the chemical detection module are subjected to sample introduction, emptying and cleaning.
9. The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 6, is characterized in that: the machine case is provided with an air conditioner for adjusting the internal environment temperature of the machine case, and an air outlet of the air conditioner is communicated with the side wall of the machine case.
10. The application of the small-sized multi-parameter water quality on-line monitoring system of the integrated flow path as claimed in claim 6, is characterized in that: the touch screen is arranged at the upper end of the front cover of the case and is connected with the single chip microcomputer control system through a circuit, and the single chip microcomputer control system is arranged on the uppermost layer of the case.
CN202210523103.0A 2022-05-13 2022-05-13 Small-sized multi-parameter water quality online monitoring system and method of integrated flow path and application thereof Pending CN114965922A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115575459A (en) * 2022-12-08 2023-01-06 中国核动力研究设计院 Miniaturized modular water quality on-line monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115575459A (en) * 2022-12-08 2023-01-06 中国核动力研究设计院 Miniaturized modular water quality on-line monitoring system

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