CN113466153A - Pipe network phosphate on-line monitoring instrument - Google Patents
Pipe network phosphate on-line monitoring instrument Download PDFInfo
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- CN113466153A CN113466153A CN202110799645.6A CN202110799645A CN113466153A CN 113466153 A CN113466153 A CN 113466153A CN 202110799645 A CN202110799645 A CN 202110799645A CN 113466153 A CN113466153 A CN 113466153A
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- metering
- pipe
- digestion device
- pressure valve
- light source
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 17
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 15
- 239000010452 phosphate Substances 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 title claims abstract description 9
- 230000029087 digestion Effects 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 22
- 239000003814 drug Substances 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 11
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 7
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 6
- 239000011609 ammonium molybdate Substances 0.000 claims description 6
- 229940010552 ammonium molybdate Drugs 0.000 claims description 6
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 239000011668 ascorbic acid Substances 0.000 claims description 5
- 229960005070 ascorbic acid Drugs 0.000 claims description 5
- 235000010323 ascorbic acid Nutrition 0.000 claims description 5
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 6
- 239000011574 phosphorus Substances 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 14
- 239000003153 chemical reaction reagent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000002798 spectrophotometry method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011964 heteropoly acid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012482 calibration solution Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- CZMCJOKDDOIMHO-UHFFFAOYSA-L potassium;2,3-dihydroxybutanedioate;oxostibanylium Chemical compound [K+].[Sb+]=O.[O-]C(=O)C(O)C(O)C([O-])=O CZMCJOKDDOIMHO-UHFFFAOYSA-L 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000004448 titration Methods 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
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Abstract
The invention discloses an online phosphate monitoring instrument for a pipe network, wherein a mounting back plate is fixedly arranged in an electric pump cabinet body, an electric pump water sampler is fixedly arranged on the outer side wall of the electric pump cabinet body, a liquid inlet and a liquid outlet of an eight-way valve of an electric pump are respectively communicated with the water sampler through a guide pipe, a plurality of medicament tanks, a pure water tank, a waste liquid tank and the bottom end of a metering pipe of a metering device and a liquid inlet of a first high-pressure valve, valves are arranged at the joints, the top end of the metering pipe of the electric pump metering device is connected with an electric pump peristaltic pump through a guide pipe, the liquid outlet end of the first high-pressure valve of the electric pump is communicated with the bottom end of the electric pump digestion device, and the top end of the electric pump digestion device is communicated with a second high-pressure valve of the electric pump through a guide pipe. The invention judges the position of the liquid level by detecting the change of the received light intensity in real time, is used for accurately metering the liquid to be measured, and then adopts a digestion device to calculate the phosphorus content by utilizing the transmittance of a read water sample and a regression equation of a standard curve, thereby realizing the real-time online detection of the total phosphorus content in the water quality.
Description
Technical Field
The invention relates to a pipe network phosphate on-line monitoring instrument, and belongs to the field of water quality detection.
Background
Regarding the quantitative technique: the water quality analyzers at home and abroad mainly adopt the following quantitative principles: peristaltic pump metering, photoelectric metering, pulse diaphragm pump metering, plunger pump metering. When the peristaltic pump is used for metering, the roller of the peristaltic pump is utilized to extrude liquid formed by the hose to flow, theoretically, the flow of the liquid and the rotation angle of the roller of the peristaltic pump are in a direct proportion relation, and the peristaltic pump is generally used in the industries of chemical engineering, medical treatment and the like.
Regarding the measurement technique: in the technical aspect, the analysis principle adopted by the current domestic and foreign water quality analysis is basically as follows: spectrophotometry, titration, electrochemical analysis. The method has the advantages that the consumption of reagents, the generation amount of secondary pollution and the maintenance convenience degree of the instrument are comprehensively considered, and the application of the spectrophotometry method in the field of online analyzers is adopted.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the pipe network phosphate on-line monitor, which judges the position of a liquid level by detecting the change of received light intensity in real time and is used for accurately metering liquid to be measured, and then adopts a digestion device to calculate the phosphorus content by utilizing the transmittance of a read water sample and a regression equation of a standard curve, thereby realizing the real-time on-line detection of the total phosphorus content in water quality.
The invention mainly adopts the technical scheme that:
an online monitor for phosphate in a pipe network comprises a cabinet body, a water sampler, a peristaltic pump, a metering device, an eight-way valve, a digestion device, a first high-pressure valve and a second high-pressure valve, the cabinet body is internally and fixedly provided with a mounting back plate, the water sampler is fixedly arranged on the outer side wall of the cabinet body, the peristaltic pump, the metering device, the eight-way valve, the digestion device, the first high-pressure valve and the second high-pressure valve are all arranged on the front surface of the mounting back plate, the liquid inlet and outlet of the eight-way valve are respectively communicated with the water sampler, a plurality of medicament tanks, a pure water tank, a waste liquid tank arranged outside the cabinet body, the bottom end of the metering pipe of the metering device and the bottom end of the digestion device through guide pipes, and the joints are provided with valves, the top end of a metering tube of the metering device is connected with the peristaltic pump through a conduit, the first high-pressure valve is installed on a guide pipe which is connected with the eight-way valve and the digestion device, and the top end of the digestion device is communicated with the second high-pressure valve through the guide pipe.
Preferably, the metering device includes a metering tube mounting bracket, a metering tube and a plurality of groups of photoelectric locators, the metering tube mounting bracket is fixedly mounted inside the cabinet body, the metering tube is mounted in the metering tube mounting bracket, the photoelectric locators include a photoelectric emitter and a photoelectric receiver, the photoelectric emitter and the photoelectric receiver are respectively symmetrically mounted on two sides of the metering tube mounting bracket, photoelectric signals emitted by the photoelectric emitter are received by the photoelectric receiver after passing through the metering tube, and the plurality of groups of photoelectric locators are vertically arranged on the metering tube mounting bracket and correspond to different measuring ranges.
Preferably, the digestion device comprises a digestion device mounting support, a digestion device and a spectrum detector, the digestion device mounting support is fixedly mounted inside the cabinet body, the digestion device is fixedly mounted in the digestion device mounting support, the bottom end and the top end of the digestion device are respectively communicated with the first high-pressure valve and the second high-pressure valve through a guide pipe, the spectrum detector comprises an emission light source, a measurement light source receiving head, a reference light source receiving head and a light splitting crystal, the emission light source and the measurement light source receiving head are respectively arranged on two sides outside the digestion device mounting support, the light splitting crystal and the reference light source receiving head are both arranged on the outer side of the digestion device mounting support and are located on the same side as the emission light source, and the reference light source receiving head is located at a light outlet above the light splitting crystal.
Preferably, the emission light source is an LED monochromatic light source, the wavelength error is +/-3 nm, and the bandwidth is less than or equal to 15 nm.
Preferably, a plurality of medicament tanks arranged outside the cabinet body are respectively filled with potassium persulfate solution, ammonium molybdate solution and ascorbic acid solution.
Preferably, still include burglar alarm and 24V lithium cell, the 24V lithium cell pass through the link with the cabinet body coupling, burglar alarm installs on the link, the 24V lithium cell is the power supply of whole monitor.
Preferably, the mounting backboard further comprises a measuring circuit device and a control device, wherein the measuring circuit device and the control device are both mounted on the back face of the mounting backboard.
Has the advantages that: the invention provides a pipe network phosphate on-line monitor, which has the following advantages compared with the prior art:
(1) the invention integrates and installs the metering device and the analysis device in the shell, is convenient for installation, carrying and transportation, and simultaneously realizes real-time transmission of detection data by utilizing the wireless module.
(2) The invention controls the width of the slit to 1mm by adopting the metering detection pipeline with a slit structure, and controls the metering error to be 0.005ml by adopting a method of dynamically comparing real-time light intensity, thereby ensuring the metering precision of sampling.
(3) According to the invention, the digestion tube is used for heating at a constant temperature, the solution temperature is controlled, and the temperature of the calibration solution is kept consistent with that of the measurement solution.
(4) The colorimetric light path in the invention adopts a double-light-path design, the light source emitting light is divided into two parts by utilizing the light splitting crystal, the emitting light source is driven by adopting a DA digital-analog circuit, the reference light source receiving head measures the light intensity, the size of the driving current is automatically adjusted according to the feedback value of the measured light intensity, and the light intensity is ensured to be stabilized within the range of the design value.
(5) The invention can switch the range mode, automatically switch to the high range mode when the absorbance is too high, automatically dilute the water sample when metering and sampling, and ensure that the concentration of the reaction solution is lower than 0.01 mol/L.
(6) The invention can be installed in a pipeline to sample and detect water quality in real time, and realizes online monitoring of phosphate in a water sample in a pipe network.
(7) The anti-theft device is arranged in the invention, so that the safety of the equipment is ensured.
Drawings
FIG. 1 is a block diagram of the apparatus of the present invention;
FIG. 2 is a back view of the apparatus of the present invention;
FIG. 3 is a schematic view of the internal structure of the digestion apparatus according to the present invention;
FIG. 4 is a simplified schematic diagram of the detecting device of the present invention;
fig. 5 is a schematic view of the installation of the present invention.
In the figure: the device comprises a cabinet body 1, a water sampler 2, a peristaltic pump 3, a metering device 4, a metering tube 4-1, a metering tube mounting bracket 4-2, a photoelectric positioner 4-3, a photoelectric emitter 4-31, a photoelectric receiver 4-32, an eight-way valve 5, a digestion device 6, a digestion device mounting bracket 6-1, a digestion device 6-2, a spectrum detector 6-3, an emission light source 6-31, a measurement light source receiving head 6-32, a reference light source receiving head 6-33, a beam splitter crystal 6-34, a first high-pressure valve 7, a second high-pressure valve 8, a mounting back plate 9, an anti-theft alarm device 10, a 24V lithium battery 11, a connecting frame 12, a measurement circuit device 13 and a control device 14.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1-3, an online monitor for phosphate in pipe network comprises a cabinet 1, a water sampler 2, a peristaltic pump 3, a metering device 4, an eight-way valve 5, a digestion device 6, a first high-pressure valve 7 and a second high-pressure valve 8, wherein an installation back plate 9 is fixedly arranged in the cabinet 1, the water sampler 2 is fixedly installed on the outer side wall of the cabinet 1, the peristaltic pump 3, the metering device 4, the eight-way valve 5, the digestion device 6, the first high-pressure valve 7 and the second high-pressure valve 8 are all arranged on the front surface of the installation back plate 9, liquid inlet and outlet ports of the eight-way valve 5 are respectively communicated with the water sampler 2, the metering pipe 4-1 bottom end and the digestion device 6 bottom end of a plurality of medicament tanks, a pure water tank, a waste liquid tank and the metering device 4 arranged outside the cabinet 1, and the connection positions are all provided with valves for controlling the opening and closing of a channel in a peristaltic manner, the top end of the metering pipe 4-1 of the metering device 4 is connected with the pump 3 through a conduit, the first high-pressure valve 7 is arranged on a conduit which connects the eight-way valve 5 with the digestion device 6, and the top end of the digestion device 6 is communicated with the second high-pressure valve 8 through a conduit.
Preferably, the metering device 4 comprises a metering tube mounting bracket 4-2, a metering tube 4-1 and a plurality of groups of photoelectric locators 4-3, the metering tube mounting bracket 4-2 is fixedly mounted on a mounting backboard 9 inside the cabinet body 1, the metering tube 4-1 is mounted in the metering tube mounting bracket 4-2, the photoelectric locators 4-3 comprise photoelectric emitters 4-31 and photoelectric receivers 4-32, the photoelectric emitters 4-31 and the photoelectric receivers 4-32 are respectively and symmetrically mounted on two sides of the metering tube mounting bracket 4-2, photoelectric signals emitted by the photoelectric emitters 4-31 pass through the metering tube 4-1 and then are received by the photoelectric receivers 4-32, the plurality of groups of photoelectric locators 4-3 are vertically arranged on the metering tube mounting bracket, corresponding to different ranges.
Preferably, the digestion device 6 comprises a digestion device mounting bracket 6-1, a digestion device 6-2 and a spectrum detector 6-3, the digestion device mounting bracket 6-3 is fixedly mounted on a mounting back plate 9 inside the cabinet body 1, the digestion device 6-2 is fixedly mounted in the digestion device mounting bracket 6-1, the bottom end and the top end of the digestion device 6-2 are respectively communicated with a first high-pressure valve 7 and a second high-pressure valve 8 through a conduit, the spectrum detector 6-3 comprises an emission light source 6-31, a measurement light source receiving head 6-32, a reference light source receiving head 6-33 and a spectroscopic crystal 6-34, the emission light source 6-31 and the measurement light source receiving head 6-32 are respectively arranged at two sides outside the digestion device mounting bracket 6-1, and the spectroscopic crystal 6-34 and the reference light source receiving head 6-33 are both arranged at the digestion device mounting bracket 6-1 The outer side of the mounting bracket 6-1 is positioned at the same side as the emission light source 6-31, and the reference light source receiving head 6-33 is positioned at the light outlet above the light splitting crystal 6-34.
Preferably, the emission light sources 6-31 are LED monochromatic light sources, the wavelength error is +/-3 nm, and the bandwidth is less than or equal to 15 nm.
Preferably, a plurality of chemical tanks arranged outside the cabinet body 1 are respectively filled with potassium persulfate solution, ammonium molybdate solution and ascorbic acid solution. In the invention, the concentrations of the potassium persulfate solution, the ammonium molybdate solution and the ascorbic acid solution in each medicament pot are configured according to the detection standard. Belongs to the conventional technical means, so the detailed description is not added.
Preferably, still include burglar alarm 10 and 24V lithium cell 11, 24V lithium cell 11 through link 12 with the cabinet body 1 is connected, burglar alarm 10 installs on the link, 24V lithium cell 11 is the power supply of whole monitor.
Preferably, the device further comprises a measuring circuit device 13 and a control device 14, wherein the measuring circuit device 13 and the control device 14 are both mounted on the back surface of the mounting backboard 9. The specific measurement circuit in the present invention can be designed by those skilled in the art according to the actual situation. The control device 14 is used for controlling the peristaltic pump, the first high-pressure valve, the second high-pressure valve, the valve corresponding to each device, the digestion device and the metering device to work, and a specific control structure can be designed by a person skilled in the art according to a specific measurement technical scheme recorded in the invention, belongs to a conventional technical means, and therefore, detailed description is not provided.
As shown in figure 5, the invention can be installed in a pipeline to perform real-time online monitoring on the water quality in a pipeline network.
The working principle of the invention is as follows:
as shown in FIG. 4, the phosphorus-containing compound in the water is digested at high temperature by a reagent A (potassium persulfate) and then converted into orthophosphate, the orthophosphate can react with a reagent B (ammonium molybdate and potassium antimony oxide tartrate mixed solution) in an acidic medium to generate phosphomolybdic heteropoly acid, and then the phosphomolybdic heteropoly acid and a reagent C (ascorbic acid) undergo a reduction reaction to generate dark phosphomolybdic blue, and the absorbance of the sample is measured at a wavelength of 700nm and compared with a standard curve to calculate the concentration of the sample.
Taking the measurement of a water sample as an example, the specific measurement process is as follows:
step 1: under the condition of only opening a water sample valve (namely a valve for controlling the communication of a water sampler), controlling the peristaltic pump to rotate anticlockwise to generate negative pressure, sucking the water sample to be detected into the metering tube, and accurately controlling the entering amount through the photoelectric positioner;
step 2: and under the condition that only the first high-pressure valve 7 and the second high-pressure valve 8 at the upper end and the lower end of the digestion device are opened, the peristaltic pump is controlled to rotate clockwise to generate positive pressure, and the water sample in the metering pipe is pumped into the digestion device 6-2.
When reagents or other liquids are metered, the valves corresponding to the reagents are opened in the step 1, and the actions of other components are the same, so that the metering process of the reagents can be completed.
And after the detection is finished, only opening the first high-pressure valve 7 and a valve connected with the waste liquid tank, and pumping the waste liquid in the digestion device 6-2 into the waste liquid tank through the peristaltic pump 3 for periodic recovery.
In the invention, all liquid pumping in and out is realized by adopting a peristaltic pump.
The total phosphorus determination process comprises the following steps:
starting the peristaltic pump 3, starting the first high-pressure valve 7, conveying the liquid to be detected in the metering device 4 into a digestion device, utilizing the digestion device 6-2 to heat and pressurize for digestion, adding quantitative other reagents after cooling, measuring absorbance after full reaction, and comparing with a standard curve to calculate the concentration of a water sample.
The invention adopts ammonium molybdate spectrophotometry for determination, and the adopted medicines and the specific detection process belong to conventional technical means.
In the invention, light emitted by the emission light source 6-31 is divided into two paths by the light splitting crystal, one path passes through the digestion device and is received by the measuring light source receiving head 6-32, and the other path is directly received by the reference light source receiving head 6-33, thereby realizing the real-time monitoring of the emission light source. The reference light source receiving heads 6-33 feed back the detected light source light intensity to the control device 14, and the control device 14 automatically adjusts the driving current of the DA digital-analog circuit according to the feedback value of the measured light intensity, so as to ensure that the luminous intensity is stabilized within the range of the design value. The emission light sources 6-31 are driven by DA digital-analog circuit, which belongs to the conventional technical means and is not detailed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a pipe network phosphate on-line monitoring appearance, its characterized in that includes the cabinet body, adopts hydrophone, peristaltic pump, metering device, eight logical valve, digestion device, first high-pressure valve and second high-pressure valve, the internal fixed installation backplate that is equipped with of cabinet, adopt hydrophone fixed mounting on the lateral wall of the cabinet body, peristaltic pump, metering device, eight logical valve, digestion device, first high-pressure valve and second high-pressure valve all set up in the front of installation backplate, the business turn over liquid mouth of eight logical valve communicates through the pipe respectively adopts hydrophone, sets up at a plurality of medicament jars of cabinet body outside, pure water jar, waste liquid jar, the metering tube bottom end and the digestion device bottom, and the junction all is equipped with the valve, metering tube top of metering device pass through the pipe with the peristaltic pump is connected, first high-pressure valve is installed eight logical valve with the pipe that digestion device connects, the top end of the digestion device is communicated with the second high-pressure valve through a conduit.
2. The online phosphate monitoring instrument for the pipe network according to claim 1, wherein the metering device comprises a metering pipe mounting bracket, a metering pipe and a plurality of groups of photoelectric locators, the metering pipe mounting bracket is fixedly mounted inside the cabinet body, the metering pipe is mounted in the metering pipe mounting bracket, the photoelectric locators comprise photoelectric emitters and photoelectric receivers, the photoelectric emitters and the photoelectric receivers are symmetrically mounted on two sides of the metering pipe mounting bracket respectively, photoelectric signals emitted by the photoelectric emitters pass through the metering pipe and then are received by the photoelectric receivers, and the plurality of groups of photoelectric locators are vertically arranged on the metering pipe mounting bracket and correspond to different ranges.
3. The on-line phosphate monitor for pipe networks according to claim 1, the digestion device comprises a digestion device mounting bracket, a digestion device and a spectrum detector, the digestion device mounting bracket is fixedly mounted in the cabinet body, the digestion device is fixedly arranged in the digestion device mounting bracket, the bottom end and the top end of the digestion device are respectively communicated with the first high-pressure valve and the second high-pressure valve through guide pipes, the spectrum detector comprises an emission light source, a measuring light source receiving head, a reference light source receiving head and a light splitting crystal, the transmitting light source and the measuring light source receiving head are respectively arranged at two sides outside the digester mounting bracket, the spectroscope and the reference light source receiving head are both arranged on the outer side of the digestion device mounting bracket, and the reference light source receiving head is positioned at a light outlet above the light splitting crystal.
4. The pipe network phosphate on-line monitor of claim 3, wherein the emission light source is an LED monochromatic light source, the wavelength error is +/-3 nm, and the bandwidth is less than or equal to 15 nm.
5. The pipe network phosphate on-line monitor of claim 4, wherein a plurality of chemical tanks arranged outside the cabinet body are respectively filled with potassium persulfate solution, ammonium molybdate solution and ascorbic acid solution.
6. The online monitor of claim 1, further comprising an anti-theft alarm device and a 24V lithium battery, wherein the 24V lithium battery is connected with the cabinet body through a connecting frame, the anti-theft alarm device is mounted on the connecting frame, and the 24V lithium battery supplies power to the whole monitor.
7. The on-line phosphate monitor as claimed in claim 1, further comprising a measurement circuit device and a control device, wherein the measurement circuit device and the control device are both mounted on the back of the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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