CN104459075B - The detection method of online TOC monitor - Google Patents
The detection method of online TOC monitor Download PDFInfo
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- CN104459075B CN104459075B CN201410839950.3A CN201410839950A CN104459075B CN 104459075 B CN104459075 B CN 104459075B CN 201410839950 A CN201410839950 A CN 201410839950A CN 104459075 B CN104459075 B CN 104459075B
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Abstract
In order to improve TOC measurement accuracy, the invention provides the detection method of a kind of online TOC monitor, this online TOC monitor includes that the first total carbon measures system, the second total carbon measures system, data handling system, network transmission system, purging system, control system；This detection method includes: when data handling system judges that the first total carbon measures the measured value of system more than predetermined threshold value, start the second total carbon measurement system to measure, utilize purging system that the first total carbon is measured system to be carried out simultaneously, and when the second total carbon measures the measured value of system still beyond predetermined threshold value, measure system again with the first total carbon to measure, when the measured value that this first total carbon measures system and the second total carbon measurement system all exceedes predetermined threshold, the measured value that system of being measured by first total carbon again is measured for the last time is transmitted by network transmission system.The present invention is conducive to online, works for a long time, and improves the accuracy of long-range monitoring client data acquisition.
Description
Technical field
The present invention relates to water analysis technical field, more particularly, to the inspection of a kind of online TOC monitor
Survey method.
Background technology
Organic carbon refers to the carbon being present in rock in Organic substance.It does not include the carbon in carbonate rock, graphite.
Generally represent with the percentage ratio of rock quality.It is, in principle, that amount organic in rock also should include H,
The total amount of all elements being present in organic matter such as O, N, S
Total Organic Carbon (TOC) total organic carbon refers to dissolubility and suspension Organic substance in water body
The total amount of carbon containing.The kind of Organic substance in water is a lot, can't all carry out isolation identification at present.Often with " TOC "
Represent.TOC is the aggregative indicator of a rapid verification, and it represents in water containing organic total amount with the quantity of carbon.
But owing to it can not reflect kind and the composition of Organic substance in water, thus identical the most organic of total amount can not be reflected
The different pollution effects that carbon is caused.Usually used as the important evidence evaluating water body organism pollution level.
When the component of certain industrial wastewater is stablized relatively, can according to the total organic carbon of waste water with Biochemical oxygen demand and
Relativity between COD carrys out the discharge standard of regulation TOC, so can be greatly improved monitoring work
The efficiency made.During mensuration, first with catalysis burning or wet oxidation method, the organic carbon in sample is completely converted into
Carbon dioxide, the carbon dioxide of generation directly can be measured with infrared detector, also can be converted into methane, use
Flame ionization ditector is measured, and then carbon dioxide content is converted to phosphorus content.Refer at 900 DEG C high
Under temperature, make catalyst with platinum, make water sample oxidizing fire, measure the increment of CO2 in gas, so that it is determined that water
Phosphorus content total in sample, represents the aggregative indicator of total amount of organic in water sample.Owing to the mensuration of TOC uses height
Temperature burning, therefore Organic substance all can be aoxidized, it than BOD5 or COD more can directly represent organic always
Amount.The most often it is used to the degree of Organic Pollution in water body of evaluating.
In prior art, the application for a patent for invention of Application No. CN201110393659.4 discloses a kind of infrared
TOC analyser, it is characterised in that include total carbon measure system, DIC measure system, data handling system,
Control system forms；Total carbon is measured system by described control system, DIC is measured system process and is controlled,
And output signal is passed to described data handling system.But, in the environment being only concerned total carbon measurement result,
When utilizing its long-term work, owing to the stability of Instrument sensor limits, it is impossible to guarantee truly may be used of data
By property.The most in practice, it use DIC and measure system, this measurement system and organic measurement
System works together and can make that TOC analyser is as easy as rolling off a log to be contaminated, and then causes DATA REASONING inaccurate generally
Rate is bigger.
Summary of the invention
In order to overcome the above-mentioned weak point of prior art, the invention provides a kind of online TOC monitor
Detection method, this online TOC monitor includes that the first total carbon measures system, the second total carbon measures system, number
According to processing system, network transmission system, purging system, control system composition；Described control system is to total carbon
Measurement system is controlled, and the first total carbon measures system and the second total carbon is measured system and is used to TOC detection,
And first total carbon measure system than second total carbon measurement system certainty of measurement low, this detection method includes: when
Data handling system judges, when the first total carbon measures the measured value of system more than predetermined threshold value, to start the second total carbon
Measurement system measures, and utilizes purging system that the first total carbon is measured system simultaneously and is carried out, and works as
When second total carbon measures the measured value of system still beyond predetermined threshold value, measure system again with the first total carbon
Measure, when the measured value of this first total carbon measurement system and the second total carbon measurement system all exceedes predetermined threshold
During value, then the measured value that system of being measured by the first total carbon is measured for the last time is passed by network transmission system
Defeated.
Further, described total carbon measurement system includes: temperature probe, auto injection unit, heating burning
Unit, optical measurement unit.
Further, described auto injection unit includes: gas circuit travel mechanism, water sample bindiny mechanism, crucible
Combustion mechanism；Described heating fuel element is produced circuit, high-voltage electrical tube, high-frequency electrical magnetic control by high frequency voltage
Circuit processed, high-frequency heating serpentine pipe, quartz ampoule combustor are constituted；Prepurge unit by pressure control mechanism,
Combustor, except water pipe, adsorption tube, optical absorption pipe, air valve, connecting line constitute；Optical measurement unit
By infrared light supply, optical absorption pipe, infrared receiver sensor, photoelectric conversion circuit, signal modulating system,
Signal amplification circuit is constituted.
Further, described data handling system include signal processing and amplifying circuit, analog to digital conversion circuit,
Single chip circuit.
Further, described gas circuit travel mechanism is by air cock, mobile cylinder, air cylinder support and connecting line
Composition；Described water sample bindiny mechanism is by water sample mouth, electromagnetic valve, water sample pump, water sample walkthrough, connecting line group
Become；Burning crucible mechanism is made up of the cup-shaped crucible of platinum material, crucible bracket, rising cylinder.
Further, described heating fuel element is combustion furnace.
Further, described combustion furnace includes: heater block and combustion tube, and described heater block is heating wire,
Described combustion tube is quartz glass.
Further, when measured value is not less than predetermined threshold, then purging system removes online TOC monitor
Pipeline in deposition impurity and combustion furnace burning postadhesion impurity.
Beneficial effects of the present invention is as follows: can be conducive to system online, work for a long time continuously, and
And improve the accuracy of long-range monitoring client data acquisition.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the detection method of the TOC monitor according to the present invention.
Detailed description of the invention
As it is shown in figure 1, online TOC monitor includes that the first total carbon measures system, the second total carbon measures system,
Data handling system, network transmission system, purging system, control system form；Described control system is to always
Carbon is measured system and is controlled, and the first total carbon measures system and the second total carbon is measured system and is used to TOC detection,
And first total carbon measure system than second total carbon measurement system certainty of measurement low, this detection method includes: when
Data handling system judges, when the first total carbon measures the measured value of system more than predetermined threshold value, to start the second total carbon
Measurement system measures, and utilizes purging system that the first total carbon is measured system simultaneously and is carried out, and works as
When second total carbon measures the measured value of system still beyond predetermined threshold value, measure system again with the first total carbon
Measure, when the measured value of this first total carbon measurement system and the second total carbon measurement system all exceedes predetermined threshold
During value, then the measured value that system of being measured by the first total carbon is measured for the last time is passed by network transmission system
Defeated.
Described total carbon is measured system and is all included: temperature probe, auto injection unit, heating fuel element, light
Learn measuring unit.Wherein temperature probe is for detecting the temperature of heating fuel element, in order to suitable,
Just detect at a temperature of being basically unchanged, to improve accuracy in detection.Auto injection unit includes three parts,
One is gas circuit travel mechanism, and two is water sample bindiny mechanism, and three is crucible combustion mechanism.
Gas circuit travel mechanism is made up of air cock, mobile cylinder, air cylinder support and connecting line；Water sample connects
Mechanism is made up of water sample mouth, electromagnetic valve, water sample pump, the pre-heat-extraction system of water sample, connecting line；Burning crucible machine
Structure is made up of the cup-shaped crucible of molybdenum gold copper-base alloy, crucible bracket, rising cylinder.
Because the burning of water sample is at high temperature carried out, if sample introduction mouth and combustion system are put together, hold
Yielding and blocking；In view of above-mentioned factor, determine sampling system to be designed to isolating construction, start sample introduction
Time first promoted cylinder sample introduction mouth to be delivered to the top of crucible by air-channel system, restart entering of water sample connection system
Sample pump joins water sample in crucible, adds after water sample completes, and air-channel system promotes cylinder that water sample mouth is sent back to
Position originally, is delivered to crucible to burn in combustion system by crucible bracket.
The advantage of auto injection unit is: be automatically performed sample introduction；Sample introduction mouth separates with combustion cell and ensure that sample introduction
Mouth is indeformable, and sample introduction mouth is not easy blocking；The diameter of sample introduction mouth is bigger, need not be formed vaporific during sample introduction,
Water sample high speed pulverization, filtration need not be more beneficial for organic measurement.
Heating fuel element mainly by high frequency voltage produce circuit, high-voltage electrical tube, high-frequency electromagnetic control circuit,
High-frequency heating serpentine pipe, quartz ampoule combustor form.Amount and ignition temperature (1200 degree) according to water sample are adjusted
The frequency of whole high-frequency electromagnetic；Quartz ampoule combustor sealing to be ensured, does not allow gas leakage.
After water sample adds crucible, control system starts high-frequency electromagnetic oven, and the high frequency voltage of generation passes through spiral
Pipe is added on molybdenum gold crucible, and according to eddy current effect, crucible temperature in several seconds is increased to 1200 degree, water sample meeting
Deflagrate, carbon therein and oxygen reaction generate carbon dioxide, and the carbon dioxide of generation delivers to optical measurement list
Unit measures.Heating fuel element is airtight, and burning is to carry out in the combustor that quartz ampoule is made,
Burning just carries out oxygen blast before starting, the carbon dioxide that burning produces is delivered in measuring chamber.
The advantage of heating fuel element is: uses molybdenum gold copper-base alloy to manufacture crucible, can play catalysis in combustion process
The effect of oxidation, is more beneficial for burning；Water sample is that liquid form joins in crucible, and the volume of addition is big,
Being usually ten times of Sprayable, can add 100 microlitres, water sample is representative strong, and the accuracy of measurement is more
High；Crucible can reuse, and is conducive to the quick measurement of different water sample.
Prepurge unit by pressure control mechanism, combustor, except water pipe, adsorption tube, optical absorption pipe, gas
Valve, connecting line form.
Pressure control mechanism mainly controls the pressure of whole oxygen blast gas circuit, make pressure be maintained at one stable
Level, it is ensured that the stability of air-flow, is conducive to the stability measured.Combustor is a part for gas circuit, is
The place of water sample burning.Except water pipe is connected on the rear portion of combustor, the carbon dioxide that burning produces contains greatly
The steam of amount, uses electronic cooling to produce sub-zero low-temperature space, will place wherein except water pipe, dioxy
Change carbon gas to discharge through forming water except the chance condensation of water pipe steam, reach the purpose except water.Adsorption tube
Being connected on the rear portion except water pipe, after except water pipe, in carbon dioxide, major part water is removed, and there is also
The steam of trace, cleaner after the desiccant in adsorption tube adsorbs.Optical absorption pipe is two
Carbon oxide gas absorbs the place of infrared light, and optical absorption pipe one end connects infrared light supply, and the other end connects red
Outer reception sensor, the infrared light that light source produces is irradiated to the infrared sensor of the other end through optical absorption pipe
On, carbon dioxide enters from one end, removes from the other end, and period, a part of infrared light was absorbed.Gas
The effect of valve is the break-make controlling gas.The effect of connecting line be combustor, except water pipe, adsorption tube,
Optical absorption pipe, air valve link together, and form an airtight air-channel system, make the carbon dioxide of generation
Gas is discharged after each several part.
Optical measurement unit includes infrared light supply, optical absorption pipe, infrared receiver sensor, photoelectric conversion electricity
Road, signal modulating system, signal amplification circuit.
Infrared light supply is the device producing infrared light, it is possible to produce the infrared light of required specific wavelength, it is desirable to
Produce the wavelengths centered frequency stable of light, the power stability of light.Optical absorption pipe is by glass tubing surface gold-plating system
Become, it is desirable to smooth surface, cleaning, reduce loss and the refraction of optical signal, make signal propagate in a linear fashion.
The effect of infrared receiver sensor is that optical signal is transformed into the signal of telecommunication, and sensor receives the scope of signal and to accord with
Close the adsorption frequency of carbon dioxide.The effect of photoelectric conversion circuit is the current signal conversion of sensor conversion
Become voltage signal, and the signal of telecommunication is filtered, stabilized treatment.Signal modulating system turns DC signal
Change AC signal into.The effect of signal amplification circuit is the signal of telecommunication to carry out primary amplification, to adapt at data
The requirement of reason system.
Data handling system includes: the amplification of data and collection, data calculate, data show and export.
The signal of telecommunication to reach the requirement to signal through amplifying and filtering, analogue signal carried out digital signal
Conversion, is acquired signal by single-chip microcomputer.
Data calculate data operation to be completed, and according to optical laws, calculate the concentration of surveyed solution.
Data show and export and mainly complete the display of data, print, store, liquid crystal display display survey
The data of amount, are realized the instant printing of data by mini-printer, and data can be stored by instrument self, it is possible to
To transmit data to PC.
The signal that pre-amplification circuit is mainly sent here by signal processing and amplifying circuit is filtered and signal is put
Greatly, adaptive circuit requirement is carried out.Analog to digital conversion circuit is converted into numeral the signal of telecommunication after process by analogue signal
Signal, adapts to the requirement of single-chip microcomputer.Single chip circuit Main Function be signal is simply calculated and
Process, be fabricated to packet, send external computer to calculate；The control instruction that computer is also sent here by single-chip microcomputer
Process, perform corresponding action.The Main Function of external computer is that the data sending instrument here are carried out point
Class, calculate, process, result is exported and stores, video data waveform.
Control system is made up of two parts, and one is the control of instrumentation, and two is each electromagnetic valve of instrument and motor
Control.
Instrumentation controls to be completed by computer instruction, and the individual event to instrument controls, by the phase of operating instrument
Menu is answered to perform.To each electromagnetic valve of instrument and the control of motor, computer control instruction is sent to instrument
The single-chip microcomputer of device, single-chip microcomputer, after instruction being explained, be converted into control signal, carry out the control of corresponding actions.
After Based Intelligent Control signal is gathered by single-chip microcomputer, sending computer processes, and computer send instrument to perform after processing.
With above-mentioned foundation the preferred embodiments of the present invention for enlightenment, by above-mentioned description, related work
Personnel can carry out various change and amendment completely in the range of without departing from this invention technological thought.
The content that the technical scope of this invention is not limited in description, it is necessary to according to right
Determine its technical scope.
Claims (8)
1. the detection method of an online TOC monitor, it is characterised in that this online TOC
Monitor include first total carbon measure system, second total carbon measure system, data handling system,
Network transmission system, purging system, control system form；Total carbon is measured by described control system
System is controlled, and the first total carbon measures system and the second total carbon is measured system and is used to TOC
Detection, and the first total carbon measurement system is lower than the certainty of measurement that the second total carbon measures system, this inspection
Survey method includes: when data handling system judges that the first total carbon measures the measured value of system more than pre-
If during threshold value, start the second total carbon and measure system and measure, utilize purging system to the simultaneously
One total carbon is measured system and is carried out, and when the measured value of the second total carbon measurement system still surpasses
When going out predetermined threshold value, measure system again with the first total carbon and measure, when this first total carbon
When the measured value of measurement system and the second total carbon measurement system all exceedes predetermined threshold, then by first
The measured value that total carbon measurement system is measured for the last time is transmitted by network transmission system, with
It is easy to beneficially system and online, work for a long time continuously, and improves long-range monitoring client
The accuracy of data acquisition.
The detection method of online TOC monitor the most according to claim 1, its feature
Being, described total carbon is measured system and is included: temperature probe, auto injection unit, heating burning
Unit, optical measurement unit.
The detection method of online TOC monitor the most according to claim 2, its feature
Being, described auto injection unit includes: gas circuit travel mechanism, water sample bindiny mechanism, crucible
Combustion mechanism；Described heating fuel element is produced circuit, high-voltage electrical tube, height by high frequency voltage
Frequently electromagnetic control circuit, high-frequency heating serpentine pipe, quartz ampoule combustor are constituted；Prepurge unit
By pressure control mechanism, combustor, except water pipe, adsorption tube, optical absorption pipe, air valve, company
Adapter road is constituted；Optical measurement unit is by infrared light supply, optical absorption pipe, infrared receiver sensing
Device, photoelectric conversion circuit, signal modulating system, signal amplification circuit are constituted.
The detection method of online TOC monitor the most according to claim 1, its feature
Be, described data handling system include signal processing and amplifying circuit, analog to digital conversion circuit,
Single chip circuit.
The detection method of online TOC monitor the most according to claim 3, its feature
Being, described gas circuit travel mechanism is by air cock, mobile cylinder, air cylinder support and connecting line
Composition；Described water sample bindiny mechanism is by water sample mouth, electromagnetic valve, water sample pump, water sample walkthrough, company
Adapter road composition；Burning crucible mechanism is by the cup-shaped crucible of platinum material, crucible bracket, rising
Cylinder forms.
The detection method of online TOC monitor the most according to claim 3, its feature
Being, described heating fuel element is combustion furnace.
The detection method of online TOC monitor the most according to claim 6, its feature
Being, described combustion furnace includes: heater block and combustion tube, and described heater block is heating wire,
Described combustion tube is quartz glass.
The detection method of online TOC monitor the most according to claim 6, its feature
Being, when measured value is not less than predetermined threshold, then purging system removes online TOC monitoring
The impurity deposited in the pipeline of instrument and the impurity of combustion furnace burning postadhesion.
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| CN105842370A (en) * | 2016-05-27 | 2016-08-10 | 鼎泰（湖北）生化科技设备制造有限公司 | Fixed-nitrogen analysis equipment with series and parallel connection water removal mechanisms |
| CN106970012B (en) * | 2017-05-02 | 2024-02-20 | 湖南建研信息技术股份有限公司 | Dual-sensor dust detection device and method |
| CN112969917A (en) * | 2018-12-21 | 2021-06-15 | 株式会社岛津制作所 | Water quality analyzer |
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| US6451613B1 (en) * | 2000-09-06 | 2002-09-17 | Anatel Corporation | Instruments for measuring the total organic carbon content of water |
| SE525860C2 (en) * | 2003-09-19 | 2005-05-17 | Delaval Holding Ab | Test of cleaning results |
| US20130045540A1 (en) * | 2011-08-19 | 2013-02-21 | Hach Company | Method and apparatus for capturing and retesting an online toc excursion sample |
| CN102410988A (en) * | 2011-12-02 | 2012-04-11 | 泰安市科瑞光学仪器有限公司 | Infrared TOC (total organic carbon) analyzer |
| CN103175941B (en) * | 2012-12-29 | 2016-01-20 | 聚光科技(杭州)股份有限公司 | The judgment means of analytical equipment data validity and method |
| CN103293194A (en) * | 2013-05-09 | 2013-09-11 | 闻路红 | Pure water detection device and pure water detection method |
| CN103728429B (en) * | 2013-12-25 | 2016-06-01 | 力合科技（湖南）股份有限公司 | On-line water quality monitoring method and Monitoring systems |
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Inventor after: Zhao Jianyong Inventor after: Yu Zhiwei Inventor after: Wang Fang Inventor after: Wang Shuyan Inventor after: Ning Wei Inventor after: Yang Lu Inventor after: Wang Zhaolong Inventor before: Li Jinqiang Inventor before: Wang Xuepeng |
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Effective date of registration: 20160905 Address after: 014030 light industrial training building, No. 19, Jianhua Road, Qingshan District, the Inner Mongolia Autonomous Region, Baotou Applicant after: Inner Mongolia Louis Precision Detection Technology Co., Ltd. Address before: 610000, No. 20, building 8, No. 1, 8 South Celestial tree road, Chengdu hi tech Development Zone, Sichuan, 4 Applicant before: CHENGDU LANYU KEWEI TECHNOLOGY CO., LTD. |
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