CN211697518U - Seawater ammonia nitrogen concentration on-line measuring device - Google Patents
Seawater ammonia nitrogen concentration on-line measuring device Download PDFInfo
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- CN211697518U CN211697518U CN202020179812.8U CN202020179812U CN211697518U CN 211697518 U CN211697518 U CN 211697518U CN 202020179812 U CN202020179812 U CN 202020179812U CN 211697518 U CN211697518 U CN 211697518U
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Abstract
The utility model provides a sea water ammonia nitrogen concentration on-line measuring device, including syringe pump, multichannel diverter valve, reaction color developing device, air cooling plant, pure water solenoid valve, exhaust three-way valve, flowing back three-way valve, check valve, air pump, light source, photoreceiver and signal processing system. The utility model discloses based on GB17378.4-2007 "ocean monitoring Specification part 4: the indophenol blue spectrophotometry method in seawater analysis tests the ammonia nitrogen principle, introduces a catalyst system, greatly shortens the color reaction time, has simple operation, high automation degree and good comparability of the test result with the manual test result, and can be used for automatically and continuously measuring the ammonia nitrogen concentration in the near-shore seawater and the ocean water.
Description
Technical Field
The utility model relates to a sea water quality testing field especially relates to a sea water ammonia nitrogen concentration testing arrangement.
Background
The seawater ammonia nitrogen is an important component of the ocean nitrogen cycle and is one of the essential nutrients of the ocean phytoplankton. The ammonia nitrogen in seawater is mainly free ammonia (NH)3) And ionic ammonium (NH)4 +) Ammonia in the form of NH4 +、NH3·H2O and NH3The ratio varies with the pH salinity and temperature of the seawater, and exists primarily as free ammonia above pH 9.75 and primarily as ionic ammonium below pH 8.75. .
Ammonia nitrogen is taken as a conventional monitoring index of marine environment monitoring, manual sampling and laboratory analysis are mainly used, and the method is carried out according to GB17378.4-2007 part 4 of the marine monitoring specification: sea water analysis, and the laboratory test methods of sea water ammonia nitrogen are hypobromite oxidation method and indophenol blue spectrophotometry. Part of reagents of the hypobromite oxidation method need to be prepared in situ when used, the operation is complicated, and the requirement on the test environment is strict. The indophenol blue spectrophotometry has the characteristics of simplicity and sensitivity in operation, has the advantages of low blank value, good reproducibility, no amino acid interference and the like, is a standard method and a classical method for ammonia nitrogen analysis, can be used for measuring fresh water and seawater samples, but has long color development time (the fresh water sample needs 3 hours, and the seawater sample needs 6 hours), and is not beneficial to the rapid analysis of a large number of samples. The ammonia nitrogen concentration is closely related to the life activities of marine organisms, and the normal life activities of the marine organisms can be directly influenced, so that the rapid and accurate detection of the ammonia nitrogen concentration of the seawater and the change thereof are important for researching the marine nitrogen circulation and carrying out marine ecological environment monitoring.
In patent 1: CN105866088A proposes a device and a method for detecting the content of ammonia nitrogen in seawater on line, which realize the detection of the content of ammonia nitrogen in seawater solution based on a fluorescence spectrophotometry. The flow injection technology is combined with a fluorescence spectrophotometry, and the online detection of the ammonia nitrogen content in the seawater is realized by controlling two three-way electromagnetic valves and a peristaltic pump to sample in sequence, so that the method has the advantages of high integration level, simple operation, single mixed reagent, short reaction time and quick time effect. Through adopting the hybrid heating device to pump into the flow path in sea water sample solution and OPA mixed reagent heat to realize the intensive mixing of the two at the in-process of heating, thereby realized mixing and heating and united two into one, guaranteed the completeness of reaction when reducing the volume, help improving the accuracy of testing result.
In patent 2: CN209432704U mentions a device for detecting the content of ammonia nitrogen in seawater, which comprises a filter flask, a distillation flask and a colorimetric cylinder; the filter bottle is internally provided with a plurality of layers of filter screens for filtering the sample, and then the gas in the sample is separated by the internal baffles which are arranged in the filter bottle and distributed in a staggered way; and then distilling the sample in a distillation flask, wherein a partition plate is arranged in the distillation flask, so that interference ions in a water sample can not enter a distillate when the boiling bubble is heated and cracked, the distilled sample flows into a colorimetric tube, and the next step is carried out by adopting a Nashin colorimetric method. The utility model discloses filtration in the furthest with clear away impurity and the gas that contains in the sample, the influence of impurity and gas to the testing result is eliminated in the furthest.
In relation to patent 1: the method for detecting ammonia nitrogen in seawater adopts an OPA fluorescence spectrophotometry, the test principle does not conform to the ocean monitoring standard requirement, the method is inconsistent with a laboratory manual method, and the result comparability is poor.
In relation to patent 2: the operation is complicated, the method is not suitable for on-site ammonia nitrogen real-time on-line monitoring, the testing principle does not accord with the ocean monitoring standard requirement, the method is inconsistent with a laboratory manual method, and the result comparability is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sea water ammonia nitrogen concentration on-line measuring device, based on GB17378.4-2007 ocean monitoring standard part 4: the indophenol blue spectrophotometry method in seawater analysis tests the ammonia nitrogen principle, introduces a catalyst system, greatly shortens the chromogenic reaction time, has simple operation, high automation degree and good comparability of the test result with the manual test result.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
an online detection device for the concentration of ammonia nitrogen in seawater comprises an injection pump, a multi-channel switching valve, a reaction color development device, an air cooling device, a pure water electromagnetic valve, an exhaust three-way valve, a liquid discharge three-way valve, a one-way valve, an air pump, a light source, a light receiver and a signal processing system.
The injection pump is a high-precision industrial injection pump and comprises a sample feeding channel and a sample discharging channel; the central channel of the multi-channel switching valve is connected with a stock discharge channel of the injection pump, and one channel is connected with a top cover of the reaction color developing device; the reaction color developing device comprises a quartz glass tank, a top cover and a bottom cover, wherein a heating wire is wound outside the quartz glass tank; the air cooling device is fixed on one side of the reaction color development device; the air pump is connected with the top cover and the bottom cover of the reaction color developing device; the light source is over against the light incident port of the quartz glass tank of the reaction color developing device, the light receiver is over against the light emergent port of the quartz glass tank of the reaction color developing device, and the light receiver is connected with the signal processing system.
The upper cover of the reaction color developing device is connected with an exhaust three-way valve, and a normally closed channel of the exhaust three-way valve is connected with an air pump, and a normally open channel of the exhaust three-way valve is connected with an exhaust pipe.
The lower cover of the reaction color developing device is connected with a liquid discharge three-way valve, a normally closed channel of the reaction color developing device is connected with a waste liquid discharge pipe, and a normally open channel of the reaction color developing device is connected with the air pump through a one-way valve.
The utility model has the advantages that:
the utility model discloses based on GB17378.4-2007 "ocean monitoring Specification part 4: the indophenol blue spectrophotometry method in seawater analysis tests the ammonia nitrogen principle, introduces a catalyst system, greatly shortens the color reaction time, has simple operation, high automation degree and good comparability of the test result with the manual test result, and can be used for automatically and continuously measuring the ammonia nitrogen concentration in the near-shore seawater and the ocean water.
Drawings
In order to illustrate the embodiments of the present invention or the technical embodiments in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the device for on-line detection of ammonia nitrogen concentration in seawater of the present invention.
In the figure, 1-injection pump, 2-liquid storage ring, 3-multi-channel switching valve, 4-electromagnetic valve, 5-reaction color developing device top cover, 6-quartz glass tank, 7-cooling fan, 8-light source, 9-heating wire, 10-reaction color developing device bottom cover, 11-three-way electromagnetic valve, 12-three-way electromagnetic valve, 13-air pump, 14-light receiver, 15-temperature sensor, 16-reaction color developing device supporting side plate and 17-one-way valve.
Detailed Description
In order to make the objects, technical embodiments and advantages of the present invention clearer, the technical embodiments of the present invention will be described in detail and completely through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figure 1, the on-line analysis device for seawater ammonia nitrogen comprises an injection pump 1, a liquid storage ring 2, a multi-channel switching valve 3, an electromagnetic valve 4, a reaction color development device top cover 5, a quartz glass tank 6, a cooling fan 7, a light source 8, a heating wire 9, a reaction color development device bottom cover 10, a three-way electromagnetic valve 11, a three-way electromagnetic valve 12, an air pump 13, a light receiver 14, a temperature sensor 15, a reaction color development device supporting side plate 16 and a one-way valve 17.
And a sample introduction channel of the injection pump 1 is connected with a pure water electromagnetic valve 4 and used for extracting pure water. And a sample discharge channel of the injection pump 1 is connected with the liquid storage ring 2 and used for pumping pure water.
The liquid storage ring 2 is connected with a central channel of the multi-channel switching valve 3 and is used for extracting reagents and samples.
One channel of the multi-channel switching valve 3 is connected with the reaction color development device and is used for adding samples and reagents, and the other channels are respectively connected with air and different reaction reagents.
The reaction color developing device comprises a reaction color developing device top cover 5, a quartz glass tank 6, a heating wire 9, a reaction color developing device bottom cover 10 and a reaction color developing device supporting side plate 16. The reaction color development device top cover 5 is connected with a three-way electromagnetic valve 12.
The quartz glass jar 6 twine heater strip 9, inside concave yield is placed temperature sensor 15, both sides symmetry respectively set up light source 8 and photoreceiver 14 and reaction developing device and support curb plate 16, cooling fan 7, reaction developing device bottom 10 are placed to quartz glass jar 6 rear side.
The light source 8 is opposite to the light incident port of the quartz glass tank 6, and the emitted light irradiates the liquid in the quartz glass tank. The light receiver 14 faces the light exit port of the quartz glass jar 6, receives the light emitted through the light exit port, converts the light into an electrical signal, and outputs the electrical signal to the signal processing system.
The three-way electromagnetic valve 11 is a liquid discharge three-way valve, a normally closed channel of the three-way electromagnetic valve is connected with a waste liquid discharge pipe, a normally open channel of the three-way electromagnetic valve is connected with a one-way valve 17, and the other channel of the three-way electromagnetic valve is connected with a reaction color developing device bottom cover 10.
The three-way electromagnetic valve 12 is an exhaust three-way valve, a normally closed channel of the three-way electromagnetic valve is connected with the air pump 13, a normally open channel of the three-way electromagnetic valve is connected with the exhaust pipe, and the other channel of the three-way electromagnetic valve is connected with the reaction color developing device top cover 5.
And the air pump 13 is used for blowing air into the reaction color development device through the three-way valve 11 and the three-way valve 12.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (3)
1. An online detection device for the concentration of ammonia nitrogen in seawater is characterized by comprising an injection pump with a sample feeding channel and a sample discharging channel, a multi-channel switching valve, a reaction color developing device, an air cooling device, a pure water electromagnetic valve, an exhaust three-way valve, a liquid discharge three-way valve, a one-way valve, an air pump, a light source, a light receiver and a signal processing system; a sample discharge channel of the injection pump is connected with a central channel of the multi-channel switching valve, and one channel of the multi-channel switching valve is connected with a top cover of the reaction color developing device; the reaction color developing device comprises a quartz glass tank, a top cover and a bottom cover, wherein a heating wire is wound outside the quartz glass tank; the air cooling device is fixed on one side of the reaction color development device; the air pump is connected with the top cover and the bottom cover of the reaction color developing device; the light source is over against the light incident port of the quartz glass tank of the reaction color developing device, the light receiver is over against the light emergent port of the quartz glass tank of the reaction color developing device, the light receiver is connected with the signal processing system, and the top cover and the bottom cover of the reaction color developing device are respectively connected with the air pump.
2. The on-line detection device for seawater ammonia nitrogen concentration according to claim 1, wherein a liquid discharge three-way valve is connected to the bottom cover of the reaction color development device, a normally closed channel thereof is connected to a waste liquid discharge pipe, and a normally open channel thereof is connected to the air pump through a one-way valve.
3. The on-line detection device for the concentration of ammonia nitrogen in seawater as claimed in claim 1, wherein the upper end of the reaction color development device is connected with an exhaust three-way valve, and a normally closed channel of the exhaust three-way valve is connected with an air pump and a normally open channel is connected with an exhaust pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020179812.8U CN211697518U (en) | 2020-02-18 | 2020-02-18 | Seawater ammonia nitrogen concentration on-line measuring device |
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| CN202020179812.8U CN211697518U (en) | 2020-02-18 | 2020-02-18 | Seawater ammonia nitrogen concentration on-line measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337483A (en) * | 2020-02-18 | 2020-06-26 | 青岛卓建海洋装备科技有限公司 | Seawater ammonia nitrogen concentration online detection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337483A (en) * | 2020-02-18 | 2020-06-26 | 青岛卓建海洋装备科技有限公司 | Seawater ammonia nitrogen concentration online detection device and method |
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