CN209764710U - Ultraviolet water quality on-line monitoring appearance - Google Patents
Ultraviolet water quality on-line monitoring appearance Download PDFInfo
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- CN209764710U CN209764710U CN201822217575.5U CN201822217575U CN209764710U CN 209764710 U CN209764710 U CN 209764710U CN 201822217575 U CN201822217575 U CN 201822217575U CN 209764710 U CN209764710 U CN 209764710U
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Abstract
The utility model provides an ultraviolet quality of water on-line monitoring appearance, including hollow casing, be equipped with the sample cell in the casing, be equipped with the detection room in the sample cell, detection room both sides side is equipped with the detection window respectively, one side of sample cell is equipped with first detector, the opposite side of sample cell is equipped with lens, second detector, first illumination unit, second illumination unit. The utility model provides a pair of ultraviolet quality of water on-line monitoring appearance can detect out the COD parameter of quality of water, can be long-time from the operation, and the maintenance cost is low, and the light path is simplified, small-size convenient, the energy wavelength is stable, sensitivity and detection cycle satisfy trade application demand, realize the real-time quick monitoring to quality of water.
Description
Technical Field
The utility model belongs to the technical field of water quality monitoring, a ultraviolet quality of water on-line monitoring appearance is related to.
Background
Human life and production activities can not be kept away from boiling water, and various pollutants are mixed in drinking water and are prevented from being polluted. The following indexes are usually used for testing sewage: COD, BOD, chromaticity, suspended matters, heavy metals and the like. Wherein, the chemical oxygen Content (COD) is the amount of oxidant consumed when a certain strong oxidant is adopted to treat a water sample under a certain condition. It is an index showing the amount of reducing substances in water. The reducing substances in the water include various organic substances, nitrites, sulfides, ferrous salts, and the like, but the reducing substances are mainly organic substances. Therefore, the chemical oxygen Content (COD) is usually used as an index to measure the content of organic substances in water. The higher the chemical oxygen content is, the more serious the water body is polluted by organic matters.
The COD measurement method mainly comprises a chemical method and a physical method. The physical method is mainly an Ultraviolet absorbance method based on Lambert-Boe e's law, namely, the UV (Ultraviolet) method. The chemical method is to oxidize the reducing substances in the water sample by using a strong oxidant, then calculate the consumption of the oxidant and finally convert the consumption into the consumption of oxygen. The potassium dichromate and potassium permanganate index methods are typical methods for measuring COD in current chemical methods. The potassium permanganate method is mostly used for analyzing cleaner surface water, underground water and drinking water, namely, the low-concentration COD measurement: the potassium dichromate method is mostly used for the analysis of industrial wastewater and domestic sewage, i.e. the measurement of COD at higher concentration. The method is widely used for COD measurement in laboratories and comprises coulometry, colorimetry, catalytic digestion, TOC algorithm changing, microwave digestion and the like. At present, the COD chemical test method mostly adopts a potassium dichromate method, secondary chemical pollution is necessarily introduced when an instrument of the test method is applied, and real-time monitoring cannot be realized due to long reaction time. The method for testing the physical parameters of the sewage uses a sensor for on-line testing at present, and the optical testing can realize high-speed and real-time detection and is the development direction of the on-line monitoring of the water quality COD. Specifically, for example, chinese patent document CN201974376U discloses a small-sized device for measuring the COD of a water body, which measures the chemical oxygen content value through the change of the color of a water sample.
At present, no ultraviolet optical test tester and test method for monitoring COD performance parameters on line by using a dual-wavelength ultraviolet LED lamp are available. Therefore, the portable LED ultraviolet COD online water quality monitoring device has important significance for mastering COD performance parameters and improving the quick monitoring effect of the domestic water quality.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide an ultraviolet quality of water on-line monitoring appearance integrates the ultraviolet part of monitoring quality of water in small-size structure for solve and lack among the prior art and need not any reagent and sample pretreatment, analysis time is short, and energy stability is high, and the measurement process is accurate reliable, can be in real time, the problem of the ultraviolet quality of water on-line monitoring appearance of high-efficient detection COD sewage parameter.
in order to achieve the above and other related objects, the utility model provides an ultraviolet water quality on-line monitor, which comprises a hollow shell, a sample cell is arranged in the shell, two ends of the sample cell are respectively communicated with the side surfaces of two sides of the shell, a detection chamber is arranged in the sample cell, the side surfaces of both sides of the detection chamber are respectively provided with a detection window, the detection windows respectively penetrate through the side surfaces of both sides of the sample cell, a first detector is arranged on one side of the sample cell, a lens, a second detector, a first illumination unit and a second illumination unit are arranged on the other side of the sample cell, the first illumination unit, the second illumination unit, the lens, the detection window and the first detector are sequentially arranged along a first light path of ultraviolet light emitted by the first illumination unit and the second illumination unit, the second detector is arranged on a second light path which emits ultraviolet light along the first illumination unit and the second illumination unit.
Preferably, the casing is the rectangle, the casing is including two liang of relative long limit sides and short side, two liang of relative set up the sample cell between the long limit side, the both ends of sample cell are linked together with two liang of relative long side sides respectively.
Preferably, the shells are connected into a whole through bolts at corner positions.
More preferably, the ratio of the length of the long side to the short side is 80-85: 50-55.
Further preferably, the ratio of the length of the long side face to the short side face is 82: 52.
Preferably, the ratio of the height of the housing to the length of the long side is 30-40: 80-85.
More preferably, the ratio of the height of the housing to the length of the long side is 34: 82.
Preferably, the ratio of the area of the two sides of the sample cell in the shell is 1: 2-4.
More preferably, the ratio of the area of the two sides of the sample cell in the housing is 1: 3.
Preferably, one end of the sample cell is provided with a sample inlet, and the other end of the sample cell is provided with a sample outlet.
More preferably, be equipped with the kind arm between introduction port and the sample cell, the kind arm cavity just advance kind arm both ends and are linked together with introduction port, sample cell respectively.
Further preferably, the ratio of the length of the sample feeding arm to the short side is 25-30: 50-55.
Still further preferably, the ratio of the length of the sample arm to the short side is 28: 52.
More preferably, a sample outlet arm is arranged between the sample outlet and the sample cell, the sample outlet arm is hollow, and two ends of the sample outlet arm are respectively communicated with the sample outlet and the sample cell.
Further preferably, the ratio of the length of the sampling arm to the short side is 25 to 30: 50-55.
Still further preferably, the ratio of the length of the sampling arm to the short side is 28: 52.
further preferably, the length of the sample inlet arm is equal to that of the sample outlet arm.
More preferably, the sample inlet is communicated with the sewage tank through a sewage pipe. The sewage tank is used for placing sewage to be detected.
More preferably, the sample outlet is communicated with a water outlet pipe.
Preferably, the detection chamber is cylindrical in shape. The detection chamber serves as a communication cell. The detection chamber is a black opaque metal box.
Preferably, the diameter of the detection chamber is larger than the inner diameter of the sample feeding arm, and the diameter of the detection chamber is larger than the inner diameter of the sample discharging arm.
Preferably, the detection windows are respectively located at opposite positions of two side surfaces of the detection chamber.
Preferably, the detection window is circular in shape. The detection window is convenient for the ultraviolet light that first light source, second light source emitted to permeate through to make the water route in the detection room can be shone by ultraviolet light.
Preferably, the ratio of the diameter of the detection window to the length of the short side face is 25-30: 50-55.
More preferably, the ratio of the diameter of the detection window to the length of the short side face is 26: 52.
Preferably, the material of the detection window is quartz glass. More preferably, the material of the detection window is ultraviolet optical quartz glass (JGS 1).
Preferably, the first detector and the second detector are both photodetectors. The photodetector is a conventionally used ultraviolet detector, and is commercially available. In particular, the photodetector has natural ultraviolet band selectivity without the need for additional filters, and the response bands cover the UVA, UVB and UVC spectral ranges. The photoelectric detector can work in a photovoltaic mode and has the characteristics of high temperature resistance, high sensitivity, high response speed, low dark current and the like. In particular a photodetector of type uv035DQ, made by OSI Optoelectronics.
Preferably, the lens is an ultraviolet collimating plano-convex lens. The incident surface of the ultraviolet collimation plano-convex lens is a plane, and the emergent surface of the ultraviolet collimation plano-convex lens is a condensing convex lens. The light transmittance of the lens is more than or equal to 90 percent.
Preferably, the lens is made of quartz glass. More preferably, the lens is made of ultraviolet optical quartz glass (JGS 1). The ultraviolet optical quartz glass is optical quartz glass melted by high-purity oxyhydrogen. Has excellent ultraviolet transmitting performance, especially in short wave ultraviolet region, has transmittance far superior to that of other glass, and has transmittance up to 90% at 185nm, and is excellent optical material in 185-2500nm wavelength range.
Preferably, the first illumination unit comprises a first light source and a first baffle plate, and the first light source is fixed on the first baffle plate; the second illumination unit comprises a second light source and a second baffle, the second light source is fixed on the second baffle, and the second baffle is provided with a first light hole and a second light hole; the first light source emits ultraviolet light through the first light hole and the second light hole respectively, the first light hole is arranged on a second light path where the first light source emits ultraviolet light, and the second light hole is arranged on a first light path where the first light source emits ultraviolet light.
More preferably, the first baffle is parallel to the second baffle, and two ends of the first baffle and the second baffle are respectively connected with the long side surface and the short side surface adjacent to each other in the casing.
More preferably, the ratio of the vertical distance between the first baffle and the second baffle to the length of the short side is 10-15: 50-55.
most preferably, the ratio of the vertical distance between the first baffle and the second baffle to the length of the short side is 13: 52.
More preferably, the ratio of the length of the first baffle to the short side is 25-35: 50-55.
Most preferably, the ratio of the length of the first baffle to the short side is 30: 52.
More preferably, the ratio of the length of the second baffle to the short side is 45-50: 50-55.
Most preferably, the ratio of the length of the second baffle to the short side is 48: 52.
More preferably, the included angle between the first baffle and the long side surface is 55-65 degrees.
Most preferably, the first baffle is at an angle of 60 ° to the long side surface.
More preferably, the ratio of the aperture of the first light-transmitting hole to the diameter of the detection chamber is 0.9-1.1: 25-30.
Most preferably, the ratio of the aperture of the first light-transmitting hole to the diameter of the detection chamber is 1: 26.
More preferably, the ratio of the aperture of the second light-transmitting hole to the diameter of the detection chamber is 0.9-1.1: 25-30.
most preferably, the ratio of the aperture of the second light-transmitting hole to the diameter of the detection chamber is 1: 26.
More preferably, the first light-transmitting hole and the second light-transmitting hole have the same aperture.
More preferably, the splitting ratio of the first light transmission hole or the second light transmission hole is 40-60%.
More preferably, the first light source and the second light source are LED lamp light sources. The LED lamp is a conventionally used LED lamp and can be purchased in the market. Specifically, Qingdao Jersey company produces LED lamp of 257nm model.
More preferably, the first light source has a wavelength of 397-399 nm. Further preferably, the first light source has a wavelength of 398 nm. The wavelength of the first light source can generate absorbance of turbidity. The light intensity of the first light source at a wavelength is used to compensate for the effect of turbidity, which is not substantially absorbed by the organic matter but only characteristic of the turbidity content, so that the extinction value of the second light source can be turbidity corrected by measuring the extinction value at this wavelength, and the correct content of organic matter can be calculated.
more preferably, the wavelength of the second light source is 253-258 nm. Further preferably, the wavelength of the second light source is 257 nm. The wavelength of the second light source can generate the total absorbance of the ultraviolet light. And subtracting the absorbance of the turbidity from the total absorbance of the ultraviolet light to obtain the actual absorbance of the component to be measured to the ultraviolet light.
More preferably, the first light source and the second light source are externally connected with a power switch. Used for turning on or off the first light source and the second light source.
preferably, in the first optical path, the first light source in the first illumination unit, the second light transmission hole and the second light source in the second illumination unit, the lens center point, the central axis of the detection window in the detection chamber, and the first detector center position are on the same horizontal line.
More preferably, the ratio of the vertical distance between the second light-transmitting hole and the lens to the length of the short side face is 10-11: 50-55.
Most preferably, the ratio of the vertical distance between the second light-transmitting aperture and the lens to the length of the short side is 10.5: 52.
More preferably, the ratio of the vertical distance between the lens and the detection chamber to the length of the short side is 2.2-2.6: 50-55.
Most preferably, the ratio of the vertical distance between the lens and the detection chamber to the length of the short side is 2.4: 52.
Preferably, in the second optical path, the first light-transmitting hole is located at a focal point of the second detector.
Preferably, the ratio of the vertical distance between the first light-transmitting hole and the second detector to the length of the short side face is 41-45: 50-55.
More preferably, the ratio of the vertical distance between the first light-transmitting hole and the second detector to the length of the short side face is 43: 52.
Preferably, the first detector and the second detector are externally connected with an input/output module. The input and output module is selected from one or more of a display screen, a keyboard, a mouse and a touch screen. The input and output module is used for inputting a detection instruction and receiving detection result data output by the first detector and the second detector.
More preferably, the input/output module is connected to a power switch.
The measurement principle of the ultraviolet water quality on-line monitor is based on the absorption of organic matters in water to ultraviolet light, namely, the ultraviolet light is absorbed through a sample cell (a detection chamber), so that substances in a water body are detected and analyzed. It is calculated according to the beer-lambert (beer lambert) law, a ═ KCL, where a is absorbance, C is solution concentration, L is liquid layer thickness, and K is a proportionality constant. Based on the absorption of unsaturated organic molecules at a certain Ultraviolet (UV) wavelength, the absorption amount of ultraviolet light can be measured due to the strong spectral absorption of chemical oxygen Content (COD) in water in the UV region, and the content of unsaturated organic molecules in water, namely the chemical oxygen Content (COD), can be further analyzed. In the law, A is in direct proportion to C, a proportionality coefficient K is obtained by measuring A of a known C solution, a linear straight line between A and C is determined, and a concentration value can be obtained as long as an absorbance value is known. According to the law, the light absorption values of a group of water samples with different concentrations are measured, the data are fitted by a linear regression method by taking the light absorption values as horizontal coordinates and COD as vertical coordinates, and the correlation coefficient is calculated. Experiments prove that the linear relation between the two is good.
As above, the utility model provides a pair of online monitor of ultraviolet quality of water has following beneficial effect:
(1) The utility model provides a pair of online monitor of ultraviolet quality of water utilizes the absorption characteristic of UV method survey organic matter, adopts the ultraviolet LED lamp as the light source, and is more stable, the light beam quality is reliable than traditional xenon lamp mercury lamp. Meanwhile, a new light path design idea that two LED lamps emit two beams of ultraviolet light with the wavelengths of 253-258nm and 397-399nm is adopted to obtain two beams of monochromatic light with different wavelengths, the two beams of light are enabled to alternately irradiate the same absorption cell at a certain frequency by utilizing exquisite light path design and a switch, and then the two beams of light are respectively received by a detector. The signal is processed by a processing system to obtain the absorbance difference of the two wavelengths, and the absorbance difference is directly proportional to the concentration of the detected sample. The problem that the wavelength and the energy stability of a mercury lamp light source are poor is solved.
(2) The utility model provides a pair of ultraviolet quality of water on-line monitoring appearance, small makes mechanical design miniaturized, uses portably simply, and the LED lamp volume of its adoption is little makes mechanical design miniaturized, uses portably simply.
(3) The utility model provides a pair of online ultraviolet quality of water monitor can be under the condition that does not introduce secondary pollution quick, accurate sign aquatic organic matter content, need not any reagent and sample pretreatment, and analysis time is short, and measurement cycle is shorter, and the suitability is stronger, and the measurement process is accurate reliable to factors such as the colour of analyte, gloss are less to the influence that detects.
(4) The utility model provides a pair of online ultraviolet quality of water monitor can be long-time from the operation, and the maintenance cost is low, satisfies trade application demand, and then realizes the real-time quick monitoring to quality of water.
(5) The utility model provides a pair of online ultraviolet quality of water monitor selects the wavelength peak value to be 253-258nm, preferably 257 nm's ultraviolet spectrum, and this wave band has very high energy, can destroy the nucleic acid structure of microorganism, has strong bactericidal action to reach sterile purpose, can satisfy the special needs and the installation requirement of resident and municipal drinking water, waste water treatment, industrial water, swimming pool and other leisure facility water.
Drawings
Fig. 1 shows a schematic diagram of the ultraviolet water quality on-line monitor of the utility model.
fig. 2 shows the overall structure schematic diagram of the ultraviolet water quality on-line monitor of the utility model.
Reference numerals
1 casing
11 long side surface
12 short side face
2 sample cell
21 detection chamber
211 detecting window
22 sample inlet
23 sample introduction arm
24 sample outlet
25 sample outlet arm
3 first detector
4 lens
5 second detector
6 first illumination unit
61 first light source
62 first baffle
7 second illumination unit
71 second light source
72 second baffle
73 second light hole
74 first light hole
A first light path
B second light path
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
please refer to fig. 1-2. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1-2, the utility model provides an ultraviolet quality of water on-line monitoring appearance, including hollow casing 1, be equipped with sample cell 2 in the casing 1, the both ends of sample cell 2 are linked together with casing 1's both sides side respectively, be equipped with detection room 21 in the sample cell 2, detection room 21 both sides side is equipped with detection window 211 respectively, detection window 211 runs through sample cell 2's both sides side respectively, one side of sample cell 2 is equipped with first detector 3, the opposite side of sample cell 2 is equipped with lens 4, second detector 5, first illumination unit 6, second illumination unit 7, lens 4, detection window 211, first detector 3 set gradually along first illumination unit 6 and the first light path A of second illumination unit 7 transmission ultraviolet ray, second detector 5 is located and is followed first illumination unit 6 and second illumination unit 7 transmission ultraviolet ray on the second light path B .
In a preferred embodiment, as shown in fig. 1-2, the housing 1 is rectangular, the housing 1 includes two opposite long side surfaces 11 and short side surfaces 12, a sample cell 2 is disposed between the two opposite long side surfaces 11, and two ends of the sample cell 2 are respectively communicated with the two opposite long side surfaces 11. Wherein, the shell 1 is connected into a whole through bolts at corner positions.
Further, the ratio of the length of the long side surface 11 to the short side surface 12 is 80 to 85: 50-55, preferably 82: 52.
In a preferred embodiment, as shown in fig. 1-2, the ratio of the height of the housing 1 to the length of the long side 11 is 30-40: 80-85, preferably 34: 82.
In a preferred embodiment, as shown in fig. 1-2, the ratio of the area of the two sides of the sample cell 2 in the housing 1 is 1:2-4, preferably 1: 3.
In a preferred embodiment, as shown in fig. 2, one end of the sample cell 2 is provided with a sample inlet 22, and the other end of the sample cell 2 is provided with a sample outlet 24.
Further, as shown in fig. 2, a sample injection arm 23 is disposed between the sample injection port 22 and the sample cell 2, the sample injection arm 23 is hollow, and two ends of the sample injection arm 23 are respectively communicated with the sample injection port 22 and the sample cell 2. Specifically, the ratio of the length of the sample feeding arm 23 to the length of the short side 12 is 25-30: 50-55, preferably 28: 52.
Further, as shown in fig. 2, a sample outlet arm 25 is disposed between the sample outlet 24 and the sample cell 2, the sample outlet arm 25 is hollow, and two ends of the sample outlet arm 25 are respectively communicated with the sample outlet 24 and the sample cell 2. Specifically, the ratio of the length of the sampling arm 25 to the short side 12 is 25 to 30: 50-55, preferably 28: 52.
Further, as shown in fig. 2, the length of the sample inlet arm 23 is equal to that of the sample outlet arm 25.
Further, the sample inlet 22 is communicated with a sewage tank through a sewage pipe. The sewage tank is used for placing sewage to be detected. The sample outlet 24 is communicated with a water outlet pipe.
In a preferred embodiment, the detection chamber 21 is cylindrical in shape, as shown in FIGS. 1-2. The detection chamber 21 functions as a communication cell. The detection chamber 21 is a black opaque metal box.
In a preferred embodiment, as shown in fig. 1-2, the diameter of the detection chamber 21 is larger than the inner diameter of the sample arm 23, and the diameter of the detection chamber 21 is larger than the inner diameter of the sample arm 25.
in a preferred embodiment, as shown in fig. 1-2, the detection windows 211 are located at opposite positions on both side surfaces of the detection chamber 21, respectively.
In a preferred embodiment, the detection window 211 is circular in shape, as shown in fig. 1-2. The detection window 211 facilitates the transmission of the ultraviolet light emitted by the first light source 61 and the second light source 71, and enables the water path in the detection chamber 21 to be irradiated by the ultraviolet light. The ratio of the diameter of the detection window 211 to the length of the short side 12 is 25-30: 50-55, preferably 26: 52. the detection window 211 is made of quartz glass, preferably ultraviolet optical quartz glass (JGS 1).
In a preferred embodiment, the first detector 3 and the second detector 5 are both photodetectors. The photodetector is a conventionally used ultraviolet detector, and is commercially available. In particular, the photodetector has natural ultraviolet band selectivity without the need for additional filters, and the response bands cover the UVA, UVB and UVC spectral ranges. The photoelectric detector can work in a photovoltaic mode and has the characteristics of high temperature resistance, high sensitivity, high response speed, low dark current and the like. In particular a photodetector of type uv035DQ, made by OSI Optoelectronics.
In a preferred embodiment, the lens 4 is an ultraviolet collimating plano-convex lens. The incident surface of the ultraviolet collimation plano-convex lens is a plane, and the emergent surface of the ultraviolet collimation plano-convex lens is a condensing convex lens. The lens 4 is made of quartz glass, preferably ultraviolet optical quartz glass (JGS 1).
In a preferred embodiment, as shown in fig. 1-2, the first illumination unit 6 comprises a first light source 61, a first baffle 62, and the first light source 61 is fixed on the first baffle 62; the second illumination unit 7 comprises a second light source 71 and a second baffle 72, the second light source 71 is fixed on the second baffle 72, and the second baffle 72 is provided with a first light hole 74 and a second light hole 73; the first light source 61 emits ultraviolet light through the first light hole 74 and the second light hole 73, the first light hole 74 is arranged on a second light path B of the first light source 61 emitting ultraviolet light, and the second light hole 73 is arranged on a first light path A of the first light source 61 emitting ultraviolet light.
Further, as shown in fig. 1-2, the first baffle 62 is parallel to the second baffle 72, and both ends of the first baffle 62 and the second baffle 72 are respectively connected to the long side surface 11 and the short side surface 12 adjacent to each other in the housing 1.
Further, the ratio of the vertical distance between the first baffle 62 and the second baffle 72 to the length of the short side 12 is 10-15: 50-55, preferably 13: 52. the ratio of the length of the first baffle 62 to the short side 12 is 25-35: 50-55, preferably 30: 52. the ratio of the length of the second baffle 72 to the short side 12 is 45-50: 50-55, preferably 48: 52. the angle between the first baffle 62 and the long side surface 11 is 55-65 degrees, preferably 60 degrees.
Further, the ratio of the aperture of the first light-transmitting hole 74 to the diameter of the detection chamber 21 is 0.9-1.1: 25-30, preferably 1: 26. the ratio of the aperture of the second light-transmitting hole 73 to the diameter of the detection chamber 21 is 0.9-1.1: 25-30, preferably 1: 26. the first light-transmitting hole 74 and the second light-transmitting hole 73 have the same aperture.
Further, as shown in fig. 1-2, the first light source 61 and the second light source 71 are LED light sources.
Further, the wavelength of the first light source 61 is 397-399nm, preferably 398 nm. The wavelength of the first light source 61 is capable of generating absorbance of turbidity. The light intensity of the first light source 61 at a wavelength that compensates for the effects of turbidity is capable of characterizing only the turbidity content without being substantially absorbed by the organic matter, so that the extinction value of the second light source 71 can be turbidity corrected by measuring the extinction value at this wavelength, and the correct content of organic matter can be calculated.
Further, the wavelength of the second light source 71 is 253-258nm, preferably 257 nm. The wavelength of the second light source 71 is capable of producing a total absorbance of ultraviolet light. And subtracting the absorbance of the turbidity from the total absorbance of the ultraviolet light to obtain the actual absorbance of the component to be measured to the ultraviolet light.
Further, the first light source 61 and the second light source 71 are externally connected with a power switch. For turning on or off the first light source 61 and the second light source 71.
In a preferred embodiment, as shown in fig. 1-2, in the first optical path a, the first light source 61 in the first illumination unit 6, the second light-transmitting hole 73 and the second light source 71 in the second illumination unit 7, the center point of the lens 4, the center axis of the detection window 211 in the detection chamber 21, and the center position of the first detector 3 are on the same horizontal line.
further, as shown in fig. 1-2, the ratio of the vertical distance between the second light-transmitting hole 73 and the lens 4 to the length of the short side 12 is 10-11: 50-55, preferably 10.5: 52. the ratio of the vertical distance between the lens 4 and the detection chamber 21 to the length of the short side 12 is 2.2-2.6: 50-55, preferably 2.4: 52.
In a preferred embodiment, as shown in fig. 1-2, the first light-transmissive hole 74 is located at the focal point of the second detector 5 in the second light path B.
Further, as shown in fig. 1-2, the ratio of the vertical distance between the first light-transmitting hole 74 and the second detector 5 to the length of the short side 12 is 41-45: 50-55, preferably 43: 52.
In a preferred embodiment, the first detector 3 and the second detector 5 are externally connected with an input/output module. The input and output module is selected from one or more of a display screen, a keyboard, a mouse and a touch screen. The input and output module is used for inputting a detection instruction and receiving detection result data output by the first detector 3 and the second detector 5. The input and output module is connected with the power switch.
The following describes the usage of the ultraviolet water quality on-line monitor of the present invention with reference to fig. 1-2.
After a user obtains the ultraviolet water quality on-line monitor shown in the figure 1-2, the size is as follows: the length of the long side 11 of the shell 1 is 80-85mm, and the length of the short side 12 is 50-55 mm. The height of the housing 1 is 30-40 mm. The area ratio of two sides of the sample cell 2 in the shell 1 is 1: 2-4. The length of the sample feeding arm 23 is 25-30mm, the length of the sample discharging arm 25 is 25-30mm, and the length of the sample feeding arm 23 is equal to that of the sample discharging arm 25. The diameter of the detection window 211 is 25-30 mm. The vertical distance between the first baffle 62 and the second baffle 72 is 10-15 mm. The length of the first baffle 62 is 25-35mm and the length of the second baffle 72 is 45-50 mm. The angle between the first baffle 62 and the long side surface 11 is 55-65 degrees. The aperture of the first light hole 74 is 0.9-1.1mm, the aperture of the second light hole 73 is 0.9-1.1mm, and the apertures of the first light hole 74 and the second light hole 73 are equal. The first light source 61 has a wavelength of 397-399nm and the second light source 71 has a wavelength of 253-258 nm. The vertical distance between the second light hole 73 and the lens 4 is 10-11 mm. The vertical distance between the lens 4 and the detection chamber 21 is 2.2-2.6 mm. The vertical distance between the first light-transmitting hole 74 and the second detector 5 is 41-45 mm.
Preferred dimensions are as follows: the length of the long side surface 11 of the case 1 is 82mm, and the length of the short side surface 12 is 52 mm. The height of the housing 1 is 34 mm. The area ratio of the two sides of the sample pool 2 in the shell 1 is 1: 3. The length of the sample inlet arm 23 is 28mm, the length of the sample outlet arm 25 is 28mm, and the lengths of the sample inlet arm 23 and the sample outlet arm 25 are equal. The diameter of the detection window 21 is 26 mm. The vertical distance between the first baffle 62 and the second baffle 72 is 13 mm. The first baffle 62 is 30mm in length and the second baffle 72 is 48mm in length. The first stop 62 forms an angle of 60 ° with the long side surface 11. The aperture of the first light hole 74 is 1mm, the aperture of the second light hole 73 is 1mm, and the apertures of the first light hole 74 and the second light hole 73 are equal. The wavelength of the first light source 61 is 398nm and the wavelength of the second light source 71 is 257 nm. The vertical distance between the second light-transmitting hole 73 and the lens 4 is 10.5 mm. The vertical distance between the lens 4 and the detection chamber 21 is 2.4 mm. The vertical distance between the first light-transmitting hole 74 and the second detector 5 is 43 mm.
Sewage is input into the shell 1 from a sewage tank through a sewage pipe through the sample inlet 22 and is input into the sample tank 2 through the sample inlet arm 23, the sewage flows through the detection chamber 21 and is discharged from the sample outlet 24 through the water outlet pipe through the sample outlet arm 25, and the detection chamber 21 is filled with flowing sewage samples in the flowing process. In the above process, the first illumination unit 6 and the second illumination unit 7 are started, the first light source 61 and the second light source 71 are firstly turned on and then continuously emit ultraviolet light, the ultraviolet light passes through the lens 4 on the first optical path a, then passes through the detection window 211 of the detection chamber 21, and the total absorbance data of the sewage is obtained after the detection by the first detector 3. And then the ultraviolet light is emitted in a continuous emission mode after the second light source 71 is lightened, and the absorbance data of the sewage turbidity is obtained after the ultraviolet light passes through the second detector 5 on the second light path B. Wherein, the first light source 61 and the second light source 71 are LED lamp light sources, the wavelength of the first light source 61 is 397-399nm, preferably 398 nm; the wavelength of the second light source 71 is 253-258nm, preferably 257 nm. In the irradiation process, the first illumination unit 6 splits light through the first light hole 74 and the second light hole 73, and the splitting ratio of the first light hole 74 or the second light hole 73 is 40-60%. The light transmittance of the lens 4 is more than or equal to 90 percent.
And then subtracting the absorbance data of the turbidity of the sewage from the total absorbance data of the sewage to obtain the actual absorbance data of the sewage to the ultraviolet light, and calculating according to a calculation formula to obtain the COD content in the sewage. The calculation formula of the COD content in the sewage is C/KL (A1-A2)/KL, wherein C is the content of the COD component, A is the actual absorbance value of the COD component to ultraviolet light, A1 is the total absorbance value of the COD component to the ultraviolet light, A2 is the absorbance value of the turbidity of the COD component, K is a proportionality constant, and L is the thickness of the liquid layer.
to sum up, the utility model provides a pair of ultraviolet quality of water on-line monitoring appearance can detect out the COD parameter of quality of water, can be long-time from the operation, and the maintenance cost is low, and the light path is simplified, small-size convenient, the energy wavelength is stable, sensitivity and detection cycle satisfy trade application demand, realize the real-time rapid monitoring to quality of water. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
the above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides an ultraviolet quality of water on-line monitoring appearance, its characterized in that, including hollow casing (1), be equipped with sample cell (2) in casing (1), the both ends of sample cell (2) are linked together with the both sides side of casing (1) respectively, be equipped with in sample cell (2) and detect room (21), it is equipped with detection window (211) respectively to detect room (21) both sides side, the both sides side that sample cell (2) are run through respectively to detection window (211), one side of sample cell (2) is equipped with first detector (3), the opposite side of sample cell (2) is equipped with lens (4), second detector (5), first illumination unit (6), second illumination unit (7), lens (4), detection window (211), first detector (3) are followed first illumination unit (6) and second illumination unit (7) first light path (A) of launching ultraviolet ray The second detector (5) is arranged on a second light path (B) which emits ultraviolet light along the first illumination unit (6) and the second illumination unit (7).
2. The ultraviolet water quality on-line monitor according to claim 1, wherein the shell (1) is rectangular, the shell (1) comprises two opposite long side surfaces (11) and two opposite short side surfaces (12), a sample cell (2) is arranged between the two opposite long side surfaces (11), and two ends of the sample cell (2) are respectively communicated with the two opposite long side surfaces (11).
3. The ultraviolet water quality on-line monitor according to claim 1, wherein one end of the sample cell (2) is provided with a sample inlet (22), and the other end of the sample cell (2) is provided with a sample outlet (24).
4. The ultraviolet water quality on-line monitor according to claim 3, wherein a sample introduction arm (23) is arranged between the sample introduction port (22) and the sample cell (2), the sample introduction arm (23) is hollow, and two ends of the sample introduction arm (23) are respectively communicated with the sample introduction port (22) and the sample cell (2); be equipped with out appearance arm (25) between appearance mouth (24) and sample cell (2), go out appearance arm (25) cavity just go out appearance arm (25) both ends and be linked together with appearance mouth (24), sample cell (2) respectively.
5. the ultraviolet water quality on-line monitor as set forth in claim 4, wherein the sample inlet (22) is communicated with a sewage tank through a sewage pipe; the sample outlet (24) is communicated with the water outlet pipe.
6. The ultraviolet water quality on-line monitor as set forth in claim 1, wherein the detection windows (211) are respectively located at opposite positions on both side surfaces of the detection chamber (21).
7. The ultraviolet water quality on-line monitor according to claim 1, wherein the first illumination unit (6) comprises a first light source (61) and a first baffle plate (62), and the first light source (61) is fixed on the first baffle plate (62); the second illumination unit (7) comprises a second light source (71) and a second baffle (72), the second light source (71) is fixed on the second baffle (72), and the second baffle (72) is provided with a first light hole (74) and a second light hole (73); first light source (61) are respectively through first light trap (74), second light trap (73) emission ultraviolet ray, first light trap (74) are located on first light source (61) emission ultraviolet ray's second light path (B), second light trap (73) are located on first light source (61) emission ultraviolet ray's first light path (A).
8. The ultraviolet water quality on-line monitor according to claim 7, wherein the first baffle (62) is parallel to the second baffle (72), and two ends of the first baffle (62) and the second baffle (72) are respectively connected with the adjacent long side surface (11) and the short side surface (12) in the shell (1).
9. An ultraviolet water quality on-line monitor as set forth in claim 7, characterized in that the wavelength of the first light source (61) is 397-399 nm; the wavelength of the second light source (71) is 253-258 nm.
10. The ultraviolet water quality on-line monitor as set forth in claim 7, wherein the first light source (61) and the second light source (71) are externally connected with a power switch.
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| CN201822217575.5U CN209764710U (en) | 2018-12-27 | 2018-12-27 | Ultraviolet water quality on-line monitoring appearance |
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| CN201822217575.5U CN209764710U (en) | 2018-12-27 | 2018-12-27 | Ultraviolet water quality on-line monitoring appearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650141A (en) * | 2020-07-06 | 2020-09-11 | 湖南大学 | Water quality monitoring method, apparatus and system based on multi-wavelength absorbance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650141A (en) * | 2020-07-06 | 2020-09-11 | 湖南大学 | Water quality monitoring method, apparatus and system based on multi-wavelength absorbance |
| CN111650141B (en) * | 2020-07-06 | 2021-06-22 | 湖南大学 | Water quality monitoring method, apparatus and system based on multi-wavelength absorbance |
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Granted publication date: 20191210 Termination date: 20211227 |