CN206223771U - A kind of seawater total alkalinity on-line monitoring system - Google Patents
A kind of seawater total alkalinity on-line monitoring system Download PDFInfo
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- CN206223771U CN206223771U CN201621212531.8U CN201621212531U CN206223771U CN 206223771 U CN206223771 U CN 206223771U CN 201621212531 U CN201621212531 U CN 201621212531U CN 206223771 U CN206223771 U CN 206223771U
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Abstract
The utility model belongs to marine monitoring technology field, and in particular to a kind of instrument and equipment that can be used for seawater total alkalinity on-line monitoring.Seawater total alkalinity on-line monitoring system, mainly including flow path system, monitoring device and control system；Described flow path system is used to complete sample introduction, titration, calibration, waste discharge, the flushing process of seawater sample；Described monitoring device is connected with flow path system, the solution state for monitoring flow path system, and temperature, salinity, the pH data is activations to control system that will be monitored；Described control system is connected with flow path system and monitoring device, the work for controlling flow path system, and the data that monitoring device is transmitted are processed, and completes on-line monitoring, externally the monitoring result of output seawater total alkalinity.Seawater total alkalinity on-line monitoring system of the present utility model, it is possible to achieve the on-line monitoring analysis of seawater total alkalinity, without artificial operation, increasingly automated, certainty of measurement is high.
Description
Technical field
The utility model belongs to marine monitoring technology field, and in particular to a kind of to can be used for what seawater total alkalinity was monitored on-line
Instrument and equipment.
Background technology
Total alkalinity (Total Alkalinity, TA) is an important parameter for characterizing seawater carbonate system, accurate to survey
Dinghai water TA is significant to understanding the marine biogeochemistry processes such as ocean carbon cycle, seawater acidifying.Seawater total alkalinity
Assay method mainly have single-point pH determination methods, iodimetric titration, neutralization titration and pH potentiometric titrations etc..Compared to other
Method, potentiometric titration is widely used because of precision and degree of accuracy highest.China's ocean professional standard《HY/T 178-
The measure of 2014 alkalinity of seawater》The assay method of middle recommendation is both pH potentiometric titrations.The seawater total alkalinity instrument commonly used at present
Main AS-ALK2, the VINDTA 3S of German Marianda for having an Apollo companies of the U.S., and Japan Kimoto companies
ATT-15 etc., above product is all based on potentiometric titration design, but is only capable of in experiment indoor application, it is impossible to completes seawater and exists
Line analysis is monitored.The domestic total alkalinity measurer for mainly having Xiamen University currently for seawater total alkalinity in-situ monitoring（Patent
Publication number：CN101221131）, the device accurately determines pH using photometry, then calculates and obtains total alkali angle value, equivalent to pH
Single-point method.Separately there is total alkalinity online testing device（Authorization Notice No.：CN 201926626 U）Although the device can complete alkali
The on-line monitoring of degree, but limited by method, the degree of accuracy of device and precision is not high, and does not relate to seawater salinity
To H+The influence of the factors such as activity, therefore it is unsuitable for the analysis of seawater sample.Not yet having at present more ripe can complete sea
The instrument of water total alkalinity on-line measurement.
Utility model content
Not enough for existing instrument, the utility model is based on pH potentiometric titration principles, there is provided a kind of high degree of automation,
The seawater total alkalinity on-line measurement system that response time is short, the precision degree of accuracy is good, it is adaptable to seawater total alkalinity it is long-term
The real-time research and application of line.Meanwhile, the correction of trip temperature and salinity is entered by the seawater salinity sensor of instrument internal, this practicality is new
The instrument of type is equally applicable to the more serious region of river mouth and seawater pollution.
The technical solution adopted in the utility model is：A kind of seawater total alkalinity on-line monitoring system, mainly includes stream system
System, monitoring device and control system；Described flow path system be used to completing the sample introduction of seawater sample, titration, calibration, waste discharge,
Flushing process；Described monitoring device is connected with flow path system, the solution state for monitoring flow path system, and will monitor
Temperature, salinity, pH data is activations to control system；Described control system is connected with flow path system and monitoring device system, uses
Processed in the work of control flow path system, and the data that monitoring device is transmitted, completed on-line monitoring, externally exported seawater
The monitoring result of total alkalinity.
Described flow path system include reaction tank, sampling device, pH cushioning liquid calibrating installation, reaction tank cleaning device,
Agitating device, waste discharge and waste collecting device；Described sampling device, pH cushioning liquid calibrating installation, reaction tank cleaning device
And waste discharge and waste collecting device are connected with reaction tank；Agitating device is arranged on reaction tank bottom.
Described sampling device includes seawater sample sampling device and HCl solution sampling device.
Seawater sample sampling device is made up of plunger displacement pump, multiple-way valve and pipeline, completes sampling, seawater sample is injected and is reacted
Pond.
HCl solution sampling device uses plunger displacement pump, extracts HCl solution, injects reaction tank, completes titration work.
Described pH cushioning liquid calibrating installation is made up of peristaltic pump and multiple-way valve, successively by different pH cushioning liquid schools
It is accurate（It is various）Injection reaction tank, carries out the calibration of pH/ potential measurement systems.
Described reaction tank cleaning device is made up of peristaltic pump and multiple-way valve, for flushing liquor to be injected into reaction tank, is stirring
Mix completion cleaning under the stirring of device.Meanwhile, the plunger that cleaning fluid completes seawater sample sampling device can be switched by multiple-way valve
The cleaning of pump.In addition, by reaction tank cleaning device, also electrode soak can be injected into reaction tank, kept in the gap of measurement
The moistening of electrode, electrode is preserved with long-time, realizes pH electrodes maintenances.
Described agitating device includes electromagnetic mixing apparatus and stirring magneton.
Described waste discharge and waste collecting device is made up of magnetic valve, peristaltic pump and waste liquid tank, by the waste liquid in reaction tank
Waste liquid tank is expelled to, to recycle.
Described monitoring device includes thermohaline sensor and pH/ potential electrodes, and described pH/ potential electrodes can be to H+Quickly
Response, can continuously monitor on-line for a long time after primary calibration, without frequent maintenance, be adapted to on-line monitoring.Sensed more than
Device monitors flow path system solution state, and monitoring system is by the data is activations such as temperature, salinity, pH to machine system.
Described control system completes calibration, sample introduction, drop by controlling the plunger displacement pump of flow path system, peristaltic pump, magnetic valve
Fixed, waste discharge, the process rinsed；The data message that the HCl volumes of record and monitoring device are transmitted is carried out into data processing simultaneously, is led to
The volume that built-in Gran mappings processing routine judges the HCl of titration end-point is crossed, is subject to temperature and salt correction, calculate out seawater total
The numerical value of basicity, completes on-line monitoring, externally the monitoring result of output seawater total alkalinity.
Seawater total alkalinity on-line monitoring system of the present utility model, it is possible to achieve the on-line monitoring analysis of seawater total alkalinity,
Without manually operating, increasingly automated, certainty of measurement is high, can be integrated in large-scale on-line monitoring system, such as station, buoy.
And the system has modular feature, can independently arrange in pairs or groups, wide adaptation range.
Brief description of the drawings
Fig. 1 is the structure chart of seawater total alkalinity on-line monitoring system of the present utility model.
Specific embodiment
Seawater total alkalinity on-line monitoring system of the present utility model is described in detail with reference to the accompanying drawings and examples
And elaboration.
As shown in figure 1, the seawater total alkalinity on-line monitoring system of utility model, mainly by flow path system, monitoring device, with
And control system composition.
Flow path system includes reaction tank 1, the first multiple-way valve 2, the first plunger displacement pump 3, the second plunger displacement pump 4, electromagnetic mixing apparatus
7th, the first peristaltic pump 8, the second multiple-way valve 9, the second peristaltic pump 10, the 3rd multiple-way valve 11, the 3rd peristaltic pump 12, waste liquid tank 13,
One magnetic valve 14 and the second magnetic valve 15.
Reaction tank 1 is the reaction vessel of the processes such as system calibration, titration, by the quartz glass of firm super-hydrophobic oleophobic property
Material completes.One piece of magneton is placed in reaction tank inside, during reaction in the presence of electromagnetic mixing apparatus 7, completes Beater operator
Make.
The seawater sample being made up of the first plunger displacement pump 3, the first multiple-way valve 2, the first magnetic valve 14 and polyfluortetraethylene pipe enters
Sampling device, completes precisely sampling high, and seawater sample is injected in reaction tank 1.
The HCl solution sampling device being made up of the second plunger displacement pump 4, can accurately extract HCl solution（About 0.100 mol/L, carries
Preceding Na2CO3Standardization of solution）, under control of the control system, have in the injection reaction tank 1 of step, complete titration work.
The reaction tank cleaning device being made up of the first peristaltic pump 8 and the second multiple-way valve 9 is by flushing liquor（Low CO2Content）Injection
Reaction tank, completes cleaning under the stirring of magneton and electromagnetic mixing apparatus.Meanwhile, cleaning fluid can be switched by the first multiple-way valve 2
Complete the cleaning of the first plunger displacement pump 3.
Reaction tank cleaning device again can be as pH electrodes maintenance devices, by the first peristaltic pump 8 and the second multiple-way valve 9 by electricity
Pole soak injection reaction tank 1, in the moistening of the gap holding electrode of measurement, electrode is preserved with long-time.
The pH cushioning liquid calibrating installation being made up of the second peristaltic pump 10 and the 3rd multiple-way valve 11 successively delays different pH
Rush solution calibration（It is various）In injection reaction tank 1, the calibration of pH/ potential measurement systems is carried out.
Waste liquid tank 13 is connected with reaction tank, is arranged the waste liquid in reaction tank by the second magnetic valve 14 and the 3rd peristaltic pump 12
Go out to waste liquid tank, to recycle.
Monitoring device is made up of high accuracy thermohaline sensor 6 and high accuracy pH/ potential electrodes 5, pH/ potential electrodes used
5 can be to H+Quick response, can continuously monitor on-line for a long time after primary calibration, without frequent maintenance, be adapted to on-line monitoring.It is logical
Above Sensor monitoring flow path system solution state is crossed, the data is activations such as temperature, salinity, pH to whole machine are controlled system by monitoring system
System.
Control system is by controlling high accuracy number plunger displacement pump, high precision peristaltic pump, multiple-way valve, the magnetic valve of flow path system
Deng the process for completing calibration, sample introduction, titration, waste discharge, flushing；The data for simultaneously transmitting the HCl volumes of record and monitoring device
Information carries out data processing, and the volume of the HCl of titration end-point is judged by modes such as Gran mappings, second differentials, is subject to temperature
And salt correction, the numerical value of seawater total alkalinity is calculated out, on-line monitoring is completed, externally the monitoring result of output seawater total alkalinity.
Plunger displacement pump in flow path system uses high accuracy number plunger displacement pump, and peristaltic pump is high precision peristaltic pump.
Seawater total alkalinity on-line monitoring system of the present utility model, its first test process is as follows：
1st, removal waste fluid：Using preceding, there are pH electrode soaks in reaction tank 1, it is therefore desirable to discharge and rinse, by the second electricity
The peristaltic pump 12 of magnet valve 15 and the 3rd is drained liquid in reaction tank.
2nd, rinse：Flushing liquor injects reaction tank 1 by the first multiple-way valve 2 by the first plunger displacement pump 3 and the first magnetic valve 14,
The flushing of the first plunger displacement pump 3 and reaction tank is completed in the presence of electromagnetic mixing apparatus 7 and magneton, the second magnetic valve 15 and the 3rd is compacted
The dynamic control of pump 12 discharge.
3rd, calibrate：PH cushioning liquid is implanted sequentially under the control of the second peristaltic pump 10 and the 3rd multiple-way valve 11 carries out pH electricity
Pole is calibrated, and after the completion of calibration, the second magnetic valve 15 and the control of the 3rd peristaltic pump 12 are discharged.
4th, seawater sample injects reaction tank by the first plunger displacement pump 3 and the first magnetic valve 14, then discharges.
5th, flushing liquor injects reaction tank by the first peristaltic pump 8 by the second multiple-way valve 9, in electromagnetic mixing apparatus 7 and magneton
In the presence of complete reaction tank, pH/ points position electrode 5 and thermohaline sensor 6 flushing.Solution conductivity is monitored by thermohaline sensor
Rate changes, and checks whether pipeline is rinsed well with reaction tank.
6th, seawater sample injects reaction tank by the first multiple-way valve 2 by the first plunger displacement pump 3, by the slow note of the second plunger displacement pump 4
Enter HCl, record adds the volume of HCl solution, while pH/ potential electrodes and temperature, the change of salinity sensor are monitored, it is excessive
It is 2.50 to be titrated to pH.Control system is by VHClWith the mapping of pH/ potential datas, processed by built-in Gran plotting programs, dripped
The data of terminal are determined, while according to the monitoring result of thermohaline sensor, final Inversion Calculation goes out total alkalinity numerical value.
During first measurement, three titration can be carried out, when three result errors of measure are less than 0.2%, whole on-line monitoring system
System can be continued to run with according to setting.If result error is larger, electrode is recalibrated, and repeat to titrate, until three results are inclined
Difference is less than 0.2%.
It is qualified to monitor for the first time, and whole on-line monitoring system monitors seawater total alkalinity according to automatic running is set.
During system continuous monitoring, complete once to monitor according to 4 → 5 → 6 order.If there is abnormal, system report in result
It is alert.
After completing test, flushing liquor injects reaction tank by the first multiple-way valve 2 by the first plunger displacement pump 3, makees in electromagnetic agitation
Rinsed with lower completion flow path system.By the first peristaltic pump 8 and the second multiple-way valve 9, electrode soak injects reaction tank to protect
Electrode.
Because the pH/ potential electrodes for using are the pH electrodes of high stability, without frequent calibration.Situation about applying for a long time
Under, system will irregularly be calibrated before test sample according to test frequency, sea state and using setting to pH electrodes.
Claims (8)
1. a kind of seawater total alkalinity on-line monitoring system, it is characterised in that：Mainly include flow path system, monitoring device and control
System processed；Described flow path system is used to complete sample introduction, titration, calibration, waste discharge, the flushing process of seawater sample；Described prison
Survey device to be connected with flow path system, the solution state for monitoring flow path system, and temperature, salinity, the pH data that will be monitored
Send to control system；Described control system is connected with flow path system and monitoring device, the work for controlling flow path system,
And the data for transmitting monitoring device are processed, on-line monitoring is completed, externally the monitoring result of output seawater total alkalinity.
2. seawater total alkalinity on-line monitoring system according to claim 1, it is characterised in that：Described flow path system includes
Reaction tank, sampling device, pH cushioning liquid calibrating installation, reaction tank cleaning device, agitating device, waste discharge and waste collection dress
Put；Described sampling device, pH cushioning liquid calibrating installation, reaction tank cleaning device and waste discharge and waste collecting device with instead
Pond is answered to connect；Agitating device is arranged on reaction tank bottom.
3. seawater total alkalinity on-line monitoring system according to claim 2, it is characterised in that：Described sampling device is main
It is made up of plunger displacement pump, including seawater sample sampling device and HCl solution sampling device.
4. seawater total alkalinity on-line monitoring system according to claim 3, it is characterised in that：Described seawater sample sample introduction
Device also includes multiple-way valve, magnetic valve.
5. seawater total alkalinity on-line monitoring system according to claim 2, it is characterised in that：Described pH cushioning liquid school
Standard apparatus and reaction tank cleaning device are constituted by peristaltic pump and multiple-way valve.
6. seawater total alkalinity on-line monitoring system according to claim 2, it is characterised in that：Described agitating device includes
Electromagnetic mixing apparatus and stirring magneton.
7. seawater total alkalinity on-line monitoring system according to claim 2, it is characterised in that：Described waste discharge and waste liquid are received
Acquisition means are made up of magnetic valve, peristaltic pump and waste liquid tank, and the waste liquid in reaction tank is expelled into waste liquid tank, to recycle.
8. the seawater total alkalinity on-line monitoring system according to claim any one of 1-7, it is characterised in that：Described monitoring
Device includes thermohaline sensor and pH/ potential electrodes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621212531.8U CN206223771U (en) | 2016-11-10 | 2016-11-10 | A kind of seawater total alkalinity on-line monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621212531.8U CN206223771U (en) | 2016-11-10 | 2016-11-10 | A kind of seawater total alkalinity on-line monitoring system |
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| CN206223771U true CN206223771U (en) | 2017-06-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645614A (en) * | 2016-11-10 | 2017-05-10 | 山东省科学院海洋仪器仪表研究所 | A seawater total alkalinity on-line monitoring system |
| CN109425688A (en) * | 2017-08-31 | 2019-03-05 | 孔燕 | Examine profession substance combustion gas examination device |
| WO2020028175A1 (en) * | 2018-07-30 | 2020-02-06 | Lixivia, Inc. | Compositions and methods for controlling ph in metal floatation processes |
| CN113551942A (en) * | 2020-04-23 | 2021-10-26 | 中国石油化工股份有限公司 | System and method for monitoring acidity of oxidizing liquid in device for producing hydrogen peroxide by anthraquinone process |
| CN113551944A (en) * | 2020-04-23 | 2021-10-26 | 中国石油化工股份有限公司 | System and method for monitoring acidity of oxidizing liquid in device for producing hydrogen peroxide by anthraquinone process |
-
2016
- 2016-11-10 CN CN201621212531.8U patent/CN206223771U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645614A (en) * | 2016-11-10 | 2017-05-10 | 山东省科学院海洋仪器仪表研究所 | A seawater total alkalinity on-line monitoring system |
| CN109425688A (en) * | 2017-08-31 | 2019-03-05 | 孔燕 | Examine profession substance combustion gas examination device |
| WO2020028175A1 (en) * | 2018-07-30 | 2020-02-06 | Lixivia, Inc. | Compositions and methods for controlling ph in metal floatation processes |
| CN113551942A (en) * | 2020-04-23 | 2021-10-26 | 中国石油化工股份有限公司 | System and method for monitoring acidity of oxidizing liquid in device for producing hydrogen peroxide by anthraquinone process |
| CN113551944A (en) * | 2020-04-23 | 2021-10-26 | 中国石油化工股份有限公司 | System and method for monitoring acidity of oxidizing liquid in device for producing hydrogen peroxide by anthraquinone process |
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