CN211553896U - Seawater COD online analysis device - Google Patents
Seawater COD online analysis device Download PDFInfo
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- CN211553896U CN211553896U CN201922157267.2U CN201922157267U CN211553896U CN 211553896 U CN211553896 U CN 211553896U CN 201922157267 U CN201922157267 U CN 201922157267U CN 211553896 U CN211553896 U CN 211553896U
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- 239000013535 sea water Substances 0.000 title claims abstract description 46
- 238000004458 analytical method Methods 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000004448 titration Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 230000029087 digestion Effects 0.000 claims description 66
- 239000000523 sample Substances 0.000 claims description 17
- 239000002585 base Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 238000011109 contamination Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 238000012544 monitoring process Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000012286 potassium permanganate Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
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- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
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- 239000012086 standard solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The utility model discloses a seawater COD online analysis device, which comprises a sample introduction unit, a reaction detection unit and a display control unit; the sampling unit comprises an injection pump 1 for extracting a sample, a liquid storage ring 2, an electromagnetic valve 4 and a ten-channel switching valve 3 are connected with the sampling pump, and the ten-channel switching valve 3 is sequentially connected with each reagent and the reaction detection unit through pipelines; the reaction detection unit is used for digesting the tank top cover 5, the tank 6, the cooling fan 7, the light source 8, the heating wire 9, the tank base 10, the three-way electromagnetic valve 11 for discharging waste liquid, the three-way electromagnetic valve 12 for exhausting, the air pump 13, the color recognition device 14, the temperature sensor 15, the tank supporting side plate 16 and the one-way valve 17. The seawater COD online analysis device provided by the utility model has simple design, small and compact whole and convenient maintenance; the device cost and the maintenance cost are low; the stirring and mixing action and the waste liquid discharging action of titration are realized by adopting an air pump, and the operation is simple and reliable.
Description
Technical Field
The utility model relates to a sea water COD online analysis device belongs to online water quality analysis field, especially relates to the COD online analysis technical field who is applicable to survey nearly bank sea water, ocean sea water.
Background
Chemical Oxygen Demand (COD) is the amount of reducing substances to be oxidized in a water sample measured by a Chemical method, is used as an important index for evaluating water quality, and can reflect the degree of pollution of a water body by the reducing substances.
The method for monitoring seawater COD in China adopts an alkaline potassium permanganate method, and the method is part 4 of ocean monitoring specifications: the standard method specified in seawater analysis (GB 17378.4-2007) has the following principle: oxidizing the aerobic substance in seawater by using a known amount of excess potassium permanganate under the alkaline heating condition, reducing the excess potassium permanganate and manganese dioxide by using potassium iodide under the sulfuric acid acidic condition, and titrating the generated free iodine by using a sodium thiosulfate standard solution. The method is generally adopted in a laboratory, has the characteristics of accurate measurement result and good reproducibility, but has the defects of complicated steps, complex operation, time and labor waste due to the need of manual on-site sampling, and incapability of detecting the COD of the ocean water in real time and meeting the requirement of modern ocean environment monitoring.
With the rapid development of economy in China, the problem of environmental pollution is increasingly serious, and long-term real-time monitoring on marine environment becomes more and more important. Therefore, seawater COD online analysis and monitoring is gradually a research focus, compared with the foreign technologies, the seawater COD online analysis technology in China is generally backward, the marketable seawater COD online analyzer is rare, and the domestic seawater COD online analyzer capable of realizing long-term real-time and accurate measurement is few, which greatly affects the monitoring, prevention and control of seawater COD in marine environment in China.
In patent 1: CN207528618U has mentioned a dual wavelength sea water COD on-line measuring device, including control and signal processing unit, light source and the signal acquisition unit that sets up in casing and the casing, the below of casing sets up the collection pond that has open import and export, the top in collection pond is the inclined plane, and the quartz optical window in the both sides in collection pond sets up the cleaning brush, the cleaning brush is by motor drive. The seawater COD online analysis device adopts the transmission light signal intensity measurement to invert COD and turbidity, can realize the direct measurement of seawater COD, has high detection speed, avoids the complex steps, does not need chemical reagents, and avoids the secondary pollution to the seawater quality.
In patent 2: the seawater COD measuring device is mentioned in CN206804530U, and the measuring device includes advance kind unit, digestion unit, condensing unit and titration unit, still includes the colour and judges the device, the colour is judged the device and is included to set up the area source and the colour sensor of titration tank both sides of titration unit, the liquid quilt that the light that the area source sent passes in the container colour sensor receives, reads when the colour is white when colour sensor, judges that blue just fades, titrates and finishes.
In relation to patent 1: the measuring device still has certain defects: the principle of detection adopts a dual-wavelength method, deviates from the ocean monitoring code part 4: seawater analysis (GB 17378.4-2007) regulates the method, and when the method is applied to high-turbidity seawater, the absorption spectrum is seriously affected, and the detection error is large.
In relation to patent 2: there are the following problems:
(1) reagents and samples of the device need to be transferred in each module, the cleaning is incomplete, residues and attachment are easy to occur, errors are increased possibly, and uncertain factors are large;
(2) the whole device is divided into a plurality of modules, so that the whole device is complex, large in size, complex in process, inconvenient to assemble and not beneficial to forming products;
(3) the failure rate of each module is high, once a certain module fails, the troubleshooting is not convenient, and the maintenance workload is increased;
(3) the consumption of reagents, pure water and samples is large, so that the waste liquid amount is large;
(4) the heating time is longer by adopting a far infrared thermal radiation mode, and the detection time is prolonged.
The above conditions are not favorable for realizing the on-line analysis and monitoring of seawater COD.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the seawater COD online analysis device meets the requirements of ocean monitoring standards, and integrates a liquid inlet function, a heating digestion function, a cooling function, a titration end point color identification function and an online analysis function.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a seawater COD on-line analysis device comprises a sample introduction unit, a reaction detection unit and a display control unit. The sample introduction unit comprises an injection pump 1 for extracting a sample, a liquid storage ring 2, an electromagnetic valve 4 and a ten-channel switching valve 3 are connected with the injection pump 1, and the ten-channel switching valve 3 is sequentially connected with each reagent and the reaction detection unit through pipelines; the reaction detection unit comprises a digestion tank top cover 5, a digestion tank 6, a cooling fan 7, a light source 8, a heating wire 9, a digestion tank base 10, a three-way electromagnetic valve 11 for waste liquid discharge, a three-way electromagnetic valve 12 for exhaust, an air pump 13, a color recognition device 14, a temperature sensor 15, a digestion tank supporting side plate 16 and a one-way valve 17; the display control unit (not shown) is a single chip microcomputer and a touch screen, the single chip microcomputer controls the opening and closing of the injection pump 1, the switching valve 3, the electromagnetic valve 4, the three-way electromagnetic valve 11, the three-way electromagnetic valve 12, the fan 7, the light source 8, the heating wire 9, the air pump 13, the color recognition sensor 14 and the temperature probe 15, and the touch screen is responsible for interacting with the single chip microcomputer, receiving and sending instructions.
Preferably, the syringe pump 1 is a high-precision industrial syringe pump, and is used for quantitative sampling and titration of samples and reagents.
Preferably, the two ends of the liquid storage ring 2 are respectively connected with the injection pump 1 and the ten-channel switching valve 3 for storing reagents and samples, and the material is polytetrafluoroethylene and has the characteristics of acid and alkali corrosion resistance and contamination resistance.
Preferably, the ten-channel switching valve 3 is an industrial-grade switching valve.
Preferably, the top cover 5 of the digestion tank is provided with three through ports which are respectively connected with the ten-channel switching valve 3, the digestion tank 6 and the three-way electromagnetic valve 12, and the sample and the reagent enter the digestion tank 6 from the upper end of the top cover 5 of the digestion tank.
Preferably, the digestion tank 6 is wound with a heating wire 9, a temperature sensor 15 is arranged in the digestion tank in a concave manner, a light source 8, a color recognition sensor 14 and a digestion tank supporting side plate 16 are respectively and symmetrically arranged on two sides of the digestion tank 6, a cooling fan 7 is arranged on the rear side of the digestion tank 6, and the lower end of the digestion tank is connected with a digestion tank base 10.
Preferably, when the three-way electromagnetic valve 12 is not electrified, the digestion tank is connected with the external atmosphere to balance the pressure in the digestion tank, when the three-way electromagnetic valve is electrified, the external atmosphere is isolated, and the air pump 13 is electrified to add air into the digestion tank so as to discharge the liquid in the digestion tank from the outlet at the lower end.
Preferably, after the three-way electromagnetic valve 11 is powered on, the air pump 13 blows air to the digestion tank 6 to mix the liquid in the digestion tank uniformly, and the one-way valve 17 only allows the air of the air pump to pass through.
Preferably, the display control unit (not shown) uses a single chip microcomputer based on an ARM core control chip as a main control unit, and embeds a real-time operating system in the touch screen to create a plurality of operation tasks.
The utility model provides a match "ocean monitoring standard part 4: the seawater COD on-line analysis device of the alkaline potassium permanganate method, the chemical oxygen demand in seawater analysis (GB 17378.4-2007), in correcting the interference problem of the high turbidity seawater, can realize the on-line monitoring device which does not need to be attended by people and can automatically detect in real time for a long time; meanwhile, the problems of high assembly and maintenance cost and large measurement error caused by the complex structure of the existing seawater COD analysis device conforming to the national standard method are solved.
Has the following innovation points:
(1) the reaction detection unit integrates blank correction, heating digestion, cooling, titration, color judgment and liquid discharge functions.
(2) The design of the whole system refers to section 4 of ocean monitoring code: chemical oxygen demand-alkaline potassium permanganate method in seawater analysis (GB 17378.4-2007).
(3) And (3) simulating human eyes to judge the change of the solution color in the process of COD detection titration by identifying RGB values through images.
The utility model has the advantages that:
the seawater COD online analysis device of the utility model has simple design, small and compact whole and convenient maintenance; the adopted injection pump and the ten-channel switching valve do not need to be specially customized, are of conventional industrial grade, and have lower device cost and maintenance cost; the stirring and mixing action and the waste liquid discharging action of titration are realized by an air pump, so that the method is simple and reliable; blank correction and color judgment of titration are realized only by adjusting the brightness of a light source and a color identification sensor, so that measurement errors caused by high-turbidity seawater and water color can be effectively reduced, the measurement precision is higher, and the method has the characteristics of simplicity in operation and stability in operation; the functions of heating digestion, cooling, titration and color judgment are integrated in the reaction detection module, so that the automation degree is higher, the cleaning is more thorough, and the instability caused by liquid transfer is avoided.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1-injection pump, 2-liquid storage ring, 3-ten-channel switching valve, 4-electromagnetic valve, 5-top cover of digestion tank, 6-digestion tank, 7-cooling fan, 8-light source, 9-heating wire, 10-base of digestion tank, 11-three-way electromagnetic valve, 12-three-way electromagnetic valve 12, 13- air pump 13, 14 color identification sensor, 15-temperature sensor, 16-side support plate of digestion tank, and 17-one-way valve.
Detailed Description
As shown in fig. 1, the seawater COD on-line analyzer provided by this embodiment includes a sample introduction unit, a reaction detection unit, and a display control unit. The sample introduction unit comprises an injection pump 1 for extracting a sample, a liquid storage ring 2, an electromagnetic valve 4 and a ten-channel switching valve 3 are connected with the injection pump 1, and the ten-channel switching valve 3 is sequentially connected with each reagent and the reaction detection unit through pipelines; the reaction detection unit comprises a digestion tank top cover 5, a digestion tank 6, a cooling fan 7, a light source 8, a heating wire 9, a digestion tank base 10, a three-way electromagnetic valve 11 for waste liquid discharge, a three-way electromagnetic valve 12 for exhaust, an air pump 13, a color recognition device 14, a temperature sensor 15, a digestion tank supporting side plate 16 and a one-way valve 17; the display control unit (not shown) is a single chip microcomputer and a touch screen, the single chip microcomputer controls the opening and closing of the injection pump 1, the switching valve 3, the electromagnetic valve 4, the three-way electromagnetic valve 11, the three-way electromagnetic valve 12, the fan 7, the light source 8, the heating wire 9, the air pump 13, the color recognition sensor 14 and the temperature probe 15, and the touch screen is responsible for interacting with the single chip microcomputer, receiving and sending instructions.
The injection pump 1 is a high-precision industrial injection pump and is used for quantitative sample introduction and titration of samples and reagents.
Two ends of the liquid storage ring 2 are respectively connected with the injection pump 1 and the ten-channel switching valve 3 for storing reagents and samples, and the material is polytetrafluoroethylene and has the characteristics of acid and alkali corrosion resistance and contamination resistance.
The ten-channel switching valve 3 is an industrial-grade switching valve.
Clear up jar top cap 5 set up three opening, connect ten passageway diverter valves 3 respectively, clear up jar 6 and three-way solenoid valve 12, sample and reagent enter into from clearing up jar top cap 5 upper end and clear up jar 6 in.
The digestion tank 6 is wound with a heating wire 9, a temperature sensor 15 is placed in the concave part, a light source 8 and a color recognition sensor 14 are symmetrically arranged on two sides of the digestion tank respectively, a support side plate 16 of the digestion tank is arranged on the rear side of the digestion tank 6, a cooling fan 7 is placed on the rear side of the digestion tank 6, and a digestion tank base 10 is connected with the lower end of the digestion tank.
When the three-way electromagnetic valve 12 is not electrified, the digestion tank is connected with the external atmosphere to balance the pressure in the digestion tank, when the three-way electromagnetic valve is electrified, the external atmosphere is isolated, and the air pump 13 is electrified to aerate the digestion tank so as to ensure that the liquid in the digestion tank is discharged from the outlet at the lower end.
The air pump 13 is used for blowing air to the digestion tank 6 after the three-way electromagnetic valve 11 is electrified, so that the liquid in the digestion tank is uniformly mixed, and the check valve 17 only allows the air of the air pump to pass through.
The display control unit (not shown) takes a single chip microcomputer based on an ARM core control chip as a main control unit, and a real-time operating system is embedded in the touch screen to create a plurality of operation tasks.
This example matches section 4 of the ocean monitoring Specification: the seawater COD on-line analysis device of the alkaline potassium permanganate method, the chemical oxygen demand in seawater analysis (GB 17378.4-2007), in correcting the interference problem of the high turbidity seawater, can realize the on-line monitoring device which does not need to be attended by people and can automatically detect in real time for a long time; meanwhile, the problems of high assembly and maintenance cost and large measurement error caused by the complex structure of the existing seawater COD analysis device conforming to the national standard method are solved.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also understand that the changes, modifications, additions or substitutions made within the scope of the present invention should belong to the protection scope of the present invention.
Claims (9)
1. A seawater COD online analysis device is characterized by comprising a sample introduction unit, a reaction detection unit and a display control unit; the sample introduction unit comprises an injection pump (1) for extracting a sample, a liquid storage ring (2), an electromagnetic valve (4) and a ten-channel switching valve (3) are connected with the injection pump (1), and the ten-channel switching valve (3) is sequentially connected with each reagent and the reaction detection unit through pipelines; the reaction detection unit comprises a digestion tank top cover (5), a digestion tank (6), a cooling fan (7), a light source (8), a heating wire (9), a digestion tank base (10), a three-way electromagnetic valve (11) for waste liquid discharge, a three-way electromagnetic valve (12) for exhaust, an air pump (13), a color recognition device (14), a temperature sensor (15), a digestion tank supporting side plate (16) and a one-way valve (17); the display control unit is a single chip microcomputer and a touch screen, the single chip microcomputer controls opening and closing of the injection pump (1), the switching valve (3), the electromagnetic valve (4), the three-way electromagnetic valve (11), the three-way electromagnetic valve (12), the fan (7), the light source (8), the heating wire (9), the air pump (13), the color recognition sensor (14) and the temperature probe (15), and the touch screen is responsible for interacting with the single chip microcomputer, receiving and giving out instructions.
2. The seawater COD online analysis device according to claim 1, wherein the injection pump (1) is a high-precision industrial-grade injection pump, and is used for quantitative sampling and titration of samples and reagents.
3. The seawater COD online analysis device according to claim 1, wherein the two ends of the liquid storage ring (2) are respectively connected with the injection pump (1) and the ten-channel switching valve (3) for storing reagents and samples, and the material is polytetrafluoroethylene which has the characteristics of acid and alkali corrosion resistance and contamination resistance.
4. The seawater COD on-line analyzer according to claim 1, wherein the ten-channel switching valve (3) is an industrial-grade switching valve.
5. The seawater COD online analysis device according to claim 1, wherein the top cover (5) of the digestion tank is provided with three through ports which are respectively connected with the ten-channel switching valve (3), the digestion tank (6) and the three-way electromagnetic valve (12), and the sample and the reagent enter the digestion tank (6) from the upper end of the top cover (5) of the digestion tank.
6. The seawater COD online analysis device according to claim 1, wherein the digestion tank (6) is wound with a heating wire (9), a temperature sensor (15) is arranged in the digestion tank in a concave manner, a light source (8), a color recognition sensor (14) and a digestion tank supporting side plate (16) are respectively and symmetrically arranged at two sides of the digestion tank, a cooling fan (7) is arranged at the rear side of the digestion tank (6), and the lower end of the digestion tank is connected with a digestion tank base (10).
7. The seawater COD online analysis device according to claim 1, wherein when the three-way solenoid valve (12) is not energized, the digestion tank is connected with the external atmosphere to balance the pressure in the digestion tank, when the three-way solenoid valve is energized, the external atmosphere is isolated, and the air pump (13) is energized to aerate the digestion tank so as to discharge the liquid in the digestion tank from the lower end outlet.
8. The seawater COD online analysis device according to claim 1, wherein the air pump (13) blows air to the digestion tank (6) after the three-way electromagnetic valve (11) is electrified, so as to realize the uniform mixing of liquid in the digestion tank, and the one-way valve (17) only allows the air of the air pump to pass through.
9. The seawater COD online analysis device of claim 1, wherein the display control unit uses a single chip microcomputer based on an ARM core control chip as a main control unit, and a real-time operating system is embedded in a touch screen to create a plurality of operation tasks.
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| CN201922157267.2U CN211553896U (en) | 2019-12-05 | 2019-12-05 | Seawater COD online analysis device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611833A (en) * | 2020-12-28 | 2021-04-06 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
| CN112730525A (en) * | 2020-12-25 | 2021-04-30 | 杭州绿洁环境科技股份有限公司 | Low-concentration trace water sample pH conductivity detector |
| CN114029102A (en) * | 2021-12-09 | 2022-02-11 | 河北百斛环保科技有限公司 | A multifunctional liquid reaction device |
-
2019
- 2019-12-05 CN CN201922157267.2U patent/CN211553896U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112730525A (en) * | 2020-12-25 | 2021-04-30 | 杭州绿洁环境科技股份有限公司 | Low-concentration trace water sample pH conductivity detector |
| CN112730525B (en) * | 2020-12-25 | 2024-01-16 | 杭州绿洁科技股份有限公司 | Low-concentration trace water sample pH conductivity detector |
| CN112611833A (en) * | 2020-12-28 | 2021-04-06 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
| CN112611833B (en) * | 2020-12-28 | 2022-08-23 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
| CN114029102A (en) * | 2021-12-09 | 2022-02-11 | 河北百斛环保科技有限公司 | A multifunctional liquid reaction device |
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