CN105738359A - Online detector for water hardness - Google Patents
Online detector for water hardness Download PDFInfo
- Publication number
- CN105738359A CN105738359A CN201610251035.1A CN201610251035A CN105738359A CN 105738359 A CN105738359 A CN 105738359A CN 201610251035 A CN201610251035 A CN 201610251035A CN 105738359 A CN105738359 A CN 105738359A
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- hardness
- way valve
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- tank
- pipeline
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Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1853—Water hardness of water
Abstract
The invention discloses an online detector for water hardness.The online detector comprises a to-be detected water sample feeding system, a reagent feeding system, an effluent removing system, a PLC and a color measurement system.The PLC pumps a to-be-detected water sample, a buffer solution, a coordination agent and an indicator into a cuvette for a reaction by controlling three-way valves and diaphragm pumps in all the systems, a light source and a color sensor work together to collect the color of the water sample in the cuvette and transmit a color value to a measurement and control system in a frequency mode simultaneously, the measurement and control system converts the frequency into an RGB value and then converts the RGB value into an HSB value, and the frequency is output in an RS485 signal mode at last.The detector not only can online monitor the water hardness, but also has the advantages of being high in precision, high in sensitivity and large in measurement range, and the precision of detection on the water hardness can reach 0.005 mol/L.
Description
Technical field
The present invention relates to a kind of water hardness detector, particularly relate to a kind of water hardness on-line detector, it is possible to on-line monitoring water hardness.
Background technology
Hardness of water is closely bound up with our life, people also have developed the method for the various mensuration water hardness, generally having compleximetry, spectrophotography, atomic absorption method, the chromatography of ions etc., in order to improve production efficiency, researcher have developed various water hardness on-line computing model in succession.So-called " online ", it is embodied in the automatization of hardness monitor, relative to traditional artificial measuring water hardness, the generation of hardness on-line computing model, is truly realized unattended intelligent operation.The hardness on-line computing model sold on market is of a great variety, is generally divided into lower range hardness tester (measurement range 0.5～10mg/L, in CaCO3, lower same) and high range hardness tester (measurement range 10～1000mg/L).The method of the mensuration hardness used is generally spectrophotography.But, current this kind of water hardness monitor, its price is sufficiently expensive, constrains the extensive use of this quasi-instrument.Being additionally, since the limitation of spectrophotography, when in sample containing some special material, can not draw absorbance accurately under the light of specific wavelength irradiates, this is the another big key factor limiting this instrument application.
Summary of the invention
In order to solve the deficiency that in prior art, water hardness on-line detector certainty of measurement is not high, measurement range is little, it is an object of the invention to provide a kind of water hardness on-line detector.Described detector can not only realize on-line monitoring water hardness, and has pinpoint accuracy, high sensitivity, feature that range is big, and the accuracy of detection of the water hardness can be reached 0.005mol/L.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that
A kind of water hardness on-line detector, it is characterised in that described on-line detector includes water sample feed system to be measured, feed system, waste liquid removal system, PLC and colour developing measurement system；
Described colour developing measurement system includes membrane pump, cuvette, light source, color sensor and TT&C system, described barrier film delivery side of pump is connected with the import of cuvette by pipeline, the outlet of cuvette is connected with waste liquid removal system by pipeline, described cuvette both sides are oppositely arranged two transparent apertures, one transparent apertures arranged outside light source, the arranged outside color sensor of another transparent apertures, light source is connected with TT&C system by holding wire with color sensor；Described water sample feed system to be measured includes low-hardness water surge tank and high hardness water surge tank, described low-hardness water surge tank and high hardness water surge tank have sample introduction pipeline respectively that arrange electromagnetic valve, and two entrances of three-way valve V1 it are connected to respectively through pipeline, the outlet of three-way valve V1 is connected to an entrance of three-way valve V2 by pipeline；
Described reagent feeds system includes buffering flow container, low concentration complexant tank, high concentration complexant tank, indicator tank and one group of three-way valve, wherein buffering flow container is connected to another entrance of three-way valve V2 by pipeline, described high concentration complexant tank, low concentration complexant tank is connected to two entrances of three-way valve V4 respectively through pipeline, the outlet of three-way valve V2 and three-way valve V4 is connected to two entrances of three-way valve V3 respectively through pipeline, the outlet of a three-way valve V3 entrance by pipeline connecting tee valve V5, indicator tank another entrance by pipeline connecting tee valve V5, the outlet of described three-way valve V5 is connected to the import of membrane pump by pipeline；
Described waste liquid removal system includes peristaltic pump, three-way valve V6 and waste liquid tank；Described one end of peristaltic pump pump line is connected by pipeline with the outlet of cuvette, and the other end of peristaltic pump pump line is connected with waste liquid tank by three-way valve V6；
Described PLC is connected with the electromagnetic valve in water sample feed system to be measured, reagent feeds system and colour developing measurement system, three-way valve, membrane pump and peristaltic pump by holding wire.
Described low-hardness water surge tank is provided with pipeline connecting tee valve V6.
Described low-hardness water surge tank, high hardness water surge tank bottom be respectively provided with a discharge pipe with electromagnetic valve.
The NH that buffer is pH=10 in described buffering flow container3-NH4Cl；Complexant in high concentration complexant tank is concentration is the EDTA of 0.04mol/L, and the complexant in low concentration complexant tank is concentration is the EDTA of 0.002mol/L；Indicator in described indicator tank is C.I. 14645..
In described high hardness water surge tank, high rigidity hardness of water is 0.2-5mg/L, and in low-hardness water surge tank, soft hardness of water is 0.005-0.2mg/L.
In on-line computing model of the present invention, TT&C system controls three-way valve V1, three-way valve V2, three-way valve V3, the Guan Bi of three-way valve V4, three-way valve V5 and membrane pump or switch by PLC and is pumped in cuvette by the reagent (buffer, complexant and indicator) of required water sample to be measured and correspondence and react, light source and color sensor cooperating gather the color of water sample in cuvette simultaneously, and color value is inputted TT&C system with frequency quantity, TT&C system first converts frequency quantity to rgb value, rgb value is converted HSB value again to, to improve the degree of accuracy of detector.Because when the reaction in cuvette reaches titration end-point, color (rgb value) is still changing, but, after HSB value, HSB value will remain unchanged after reaching titration end-point.HSB value is converted to 4-20mA electric current and exports with RS485 signal by TT&C system again, and current value can reflect hardness of water.Display screen and control panel on detector shell are connected with TT&C system, and user can pass through the display screen on shell and control panel operation controls this water hardness on-line detector.
Beneficial effect: water hardness detector of the present invention can not only realize on-line monitoring water hardness, and there is pinpoint accuracy, high sensitivity, feature that range is big, the accuracy of detection of the water hardness can be reached 0.005mol/L, and detection range span is big, upper limit of detection can to 5mol/L, and simple to operate, production cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of water hardness on-line detector.
Detailed description of the invention
Below by specific embodiment, technical solutions according to the invention are further described in detail, but it is necessary to note that once embodiment be served only for the description to summary of the invention, be not intended that limiting the scope of the invention.
A kind of water hardness on-line detector of the present invention, structural representation is as shown in Figure 1, wherein 1 is electromagnetic valve, 2 is electromagnetic valve, 3 is low-hardness water surge tank, 4 is high hardness water surge tank, 5 is three-way valve V1, 6 is three-way valve V2, 7 is three-way valve V3, 8 is three-way valve V4, 9 is three-way valve V5, 10 is buffering flow container, 11 is low concentration complexant tank, 12 is high concentration complexant tank, 13 is indicator tank, 14 is PLC, 15 is membrane pump, 16 is cuvette, 17 is light source, 18 is color sensor, 19 is TT&C system, 20 is peristaltic pump, 21 is three-way valve V6, 22 is waste liquid tank, 23 is electromagnetic valve, 24 is electromagnetic valve.
A kind of water hardness on-line detector, described on-line detector has a control panel, a display screen and a power interface, inside described on-line detector, includes water sample feed system to be measured, reagent feeds system, waste liquid removal system, PLC14 and colour developing measurement system；Described colour developing measurement system includes membrane pump 15, cuvette 16, light source 17, color sensor 18 and TT&C system 19, the outlet of described membrane pump 15 is connected by the import of pipeline with cuvette 16, the outlet of cuvette 16 is connected with waste liquid removal system by pipeline, described cuvette 16 both sides are oppositely arranged two transparent apertures, one transparent apertures arranged outside light source 17, the arranged outside of another transparent apertures has color sensor 18, it addition, light source 17 is connected with TT&C system 19 by holding wire with color sensor 18.
Described water sample feed system to be measured include electromagnetic valve 1,2, low-hardness water surge tank 3 (wherein soft hardness of water is 0.005-0.2mg/L), high hardness water surge tank 4 (wherein high rigidity hardness of water is 0.2-5mg/L), three-way valve V1, low-hardness water feeding line, high hardness water feeding line；The import of the described low-hardness water feeding line and low-hardness water surge tank 3 top being provided with electromagnetic valve 2 is connected, the low-hardness water feeding line other end connects the water sample needing detection, and described low-hardness water surge tank 3 top is additionally provided with a mouth of two pipelines c mouth of connecting tee valve V6, three-way valve V1 respectively.Being provided with electromagnetic valve 1 on described high hardness water feeding line and the import with high hardness water surge tank 4 top is connected, the other end connects the water sample needing detection, and described high hardness water surge tank 4 is additionally provided with the c mouth of pipeline connecting tee valve V1；Described low-hardness water surge tank 3, high hardness water surge tank 4 bottom be respectively provided with a pipeline with electromagnetic valve 23,24, described pipeline interflow is to a total discharge pipe.
Described reagent feeds system includes the buffering flow container 10 (NH of pH=103-NH4Cl), low concentration complexant tank 11 (EDTA of 0.002mol/L), high concentration complexant tank 12 (EDTA of 0.04mol/L), indicator tank 13 (C.I. 14645 .) and one group of three-way valve V2, V3, V4, V5.The b mouth of described three-way valve V1, buffering flow container 10 outlet be connected to the c mouth of three-way valve V2, a mouth；Described high concentration complexant tank 12, low concentration complexant tank 11 are connected with a mouth of three-way valve V4, c mouth respectively, the b mouth of described three-way valve V4, three-way valve V2 b mouth be connected with a mouth of three-way valve V3, c mouth respectively；Described indicator tank, three-way valve V3 b mouth be connected with a mouth of three-way valve V5, c mouth respectively, the b mouth of described three-way valve V5 by pipeline connect membrane pump 15 import.
Described waste liquid removal system includes peristaltic pump 20, three-way valve V6, waste liquid tank 22；The import of described peristaltic pump 20 is connected by pipeline with the outlet of cuvette 16, and the other end outlet of peristaltic pump 20 and the import of waste liquid tank 22 are connected with the b mouth of three-way valve V6, a mouth respectively.
Described PLC is connected by holding wire electromagnetic valve all with detector, all three-way valve, membrane pump 15 and peristaltic pump 21.
TT&C system 19 controls the Guan Bi of three-way valve V1, three-way valve V2, three-way valve V3, three-way valve V4, three-way valve V5 and membrane pump 15 by PLC14 or switchs reagent (EDTA, C.I. 14645., the NH of required water sample and correspondence3-NH4Cl buffer solution) pump in cuvette 16 and react, light source 17 and color sensor 18 cooperating gather the color of water sample in cuvette simultaneously, and color value is passed to TT&C system 19 with frequency quantity, frequency quantity is first converted to rgb value by TT&C system 19, then rgb value converts to HSB value；HSB value is converted to 4-20mA electric current and exports with RS485 signal by TT&C system 19 again, and current value reflects the hardness of water quality.The conversion method of above-mentioned signal and modular structure can adopt existing techniques in realizing.When the reaction in cuvette 16 reaches titration end-point, color (rgb value) is still changing, but, after HSB value, HSB value will remain unchanged after reaching titration end-point.Display screen and control panel on shell are connected with TT&C system 19, and user can pass through the display screen on shell and control panel operation controls this water hardness on-line detector.
Claims (5)
1. a water hardness on-line detector, it is characterised in that described on-line detector includes water sample feed system to be measured, reagent feeds system, waste liquid removal system, PLC (14) and colour developing measurement system；
Described colour developing measurement system includes membrane pump (15), cuvette (16), light source (17), color sensor (18) and TT&C system (19), the outlet of described membrane pump (15) is connected by the import of pipeline with cuvette (16), the outlet of cuvette (16) is connected with waste liquid removal system by pipeline, described cuvette (16) both sides are oppositely arranged two transparent apertures, one transparent apertures arranged outside light source (17), the arranged outside of another transparent apertures has color sensor (18), light source (17) is connected with TT&C system (19) by holding wire with color sensor (18)；
Described water sample feed system to be measured includes low-hardness water surge tank (3) and high hardness water surge tank (4), described low-hardness water surge tank (3) and high hardness water surge tank (4) there is the sample introduction pipeline arranging electromagnetic valve (1,2) respectively, and two entrances of three-way valve V1 (5) it are connected to respectively through pipeline, the outlet of three-way valve V1 (5) is connected to an entrance of three-way valve V2 (6) by pipeline；
nullDescribed reagent feeds system includes buffering flow container (10)、Low concentration complexant tank (11)、High concentration complexant tank (12)、Indicator tank (13) and one group of three-way valve，Wherein cushion flow container (10) and be connected to another entrance of three-way valve V2 (6) by pipeline，Described high concentration complexant tank (12)、Low concentration complexant tank (11) is connected to two entrances of three-way valve V4 (8) respectively through pipeline，The outlet of three-way valve V2 (6) and three-way valve V4 (8) is connected to two entrances of three-way valve V3 (7) respectively through pipeline，The outlet of three-way valve V3 (7) entrance by pipeline connecting tee valve V5 (9)，Indicator tank (13) is by another entrance of pipeline connecting tee valve V5 (9)，The outlet of described three-way valve V5 (9) is connected to the import of membrane pump (15) by pipeline；
Described waste liquid removal system includes peristaltic pump (20), three-way valve V6 (21) and waste liquid tank (22)；One end of described peristaltic pump (20) pump line is connected by pipeline with the outlet of cuvette (16), and the other end of peristaltic pump (20) pump line is connected with waste liquid tank (22) by three-way valve V6 (21)；
Described PLC (14) is connected with the electromagnetic valve (1,2) in water sample feed system to be measured, reagent feeds system and colour developing measurement system, three-way valve (5,6,7,8,9,21), membrane pump (15) and peristaltic pump (21) by holding wire.
2. a kind of water hardness on-line detector according to claim 1, it is characterised in that described low-hardness water surge tank (3) is provided with pipeline connecting tee valve V6 (21).
3. a kind of water hardness on-line detector according to claim 1, it is characterized in that, described low-hardness water surge tank (3), high hardness water surge tank (4) bottom be respectively provided with a discharge pipe with electromagnetic valve (23,24).
4. a kind of water hardness on-line detector according to claim 1, it is characterised in that the NH that buffer is pH=10 in described buffering flow container (10)3-NH4Cl；Complexant in high concentration complexant tank (12) is concentration is the EDTA of 0.04mol/L, and the complexant in low concentration complexant tank (11) is concentration is the EDTA of 0.002mol/L；Indicator in described indicator tank (13) is C.I. 14645..
5. a kind of water hardness on-line detector according to claim 1, it is characterized in that, in described high hardness water surge tank (4), high rigidity hardness of water is 0.2-5mg/L, and in low-hardness water surge tank (3), soft hardness of water is 0.005-0.2mg/L.
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| CN201610251035.1A CN105738359A (en) | 2016-04-21 | 2016-04-21 | Online detector for water hardness |
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| CN201610251035.1A CN105738359A (en) | 2016-04-21 | 2016-04-21 | Online detector for water hardness |
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| CN201610251035.1A Pending CN105738359A (en) | 2016-04-21 | 2016-04-21 | Online detector for water hardness |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770923A (en) * | 2017-03-07 | 2017-05-31 | 李刚 | A kind of oil field wet steam generator water quality automatic detection device and method |
| CN107991255A (en) * | 2018-01-18 | 2018-05-04 | 广东科贸职业学院 | The self-operated measuring unit and measuring method of SOD contents in beverage |
| CN108645844A (en) * | 2018-01-22 | 2018-10-12 | 河海大学 | A kind of automation solution chromogenic reaction sensor |
| CN112147136A (en) * | 2020-10-19 | 2020-12-29 | 黑龙江峰向标科技有限公司 | Photoelectric colorimetric measuring device for water quality analysis and measuring method thereof |
| RU2741308C1 (en) * | 2020-05-19 | 2021-01-25 | Общество с ограниченной ответственностью "Научно-производственное объединение "АМБ" | Device for integrated water quality monitoring in stationary and field conditions |
| CN112782159A (en) * | 2021-02-05 | 2021-05-11 | 明物科技(北京)有限公司 | Water hardness detector and detection method thereof |
| CN113711049A (en) * | 2019-05-10 | 2021-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Sample detection device and method for operating sample detection device |
| CN113941458A (en) * | 2020-06-30 | 2022-01-18 | 芜湖美的厨卫电器制造有限公司 | Shower head, water heater and control method thereof |
| CN114034812A (en) * | 2021-11-11 | 2022-02-11 | 国网四川省电力公司电力科学研究院 | Device and method for online monitoring of hardness of external chilled water of ultra-high voltage converter station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106770923A (en) * | 2017-03-07 | 2017-05-31 | 李刚 | A kind of oil field wet steam generator water quality automatic detection device and method |
| CN107991255A (en) * | 2018-01-18 | 2018-05-04 | 广东科贸职业学院 | The self-operated measuring unit and measuring method of SOD contents in beverage |
| CN107991255B (en) * | 2018-01-18 | 2020-08-11 | 广东科贸职业学院 | Automatic measuring device and method for SOD content in beverage |
| CN108645844A (en) * | 2018-01-22 | 2018-10-12 | 河海大学 | A kind of automation solution chromogenic reaction sensor |
| CN113711049A (en) * | 2019-05-10 | 2021-11-26 | 深圳迈瑞生物医疗电子股份有限公司 | Sample detection device and method for operating sample detection device |
| RU2741308C1 (en) * | 2020-05-19 | 2021-01-25 | Общество с ограниченной ответственностью "Научно-производственное объединение "АМБ" | Device for integrated water quality monitoring in stationary and field conditions |
| CN113941458A (en) * | 2020-06-30 | 2022-01-18 | 芜湖美的厨卫电器制造有限公司 | Shower head, water heater and control method thereof |
| CN112147136A (en) * | 2020-10-19 | 2020-12-29 | 黑龙江峰向标科技有限公司 | Photoelectric colorimetric measuring device for water quality analysis and measuring method thereof |
| CN112782159A (en) * | 2021-02-05 | 2021-05-11 | 明物科技(北京)有限公司 | Water hardness detector and detection method thereof |
| CN114034812A (en) * | 2021-11-11 | 2022-02-11 | 国网四川省电力公司电力科学研究院 | Device and method for online monitoring of hardness of external chilled water of ultra-high voltage converter station |
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