CN105973954A - Oxygen content calibration gas sampling device and online oxygen content calibration method - Google Patents
Oxygen content calibration gas sampling device and online oxygen content calibration method Download PDFInfo
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- CN105973954A CN105973954A CN201610576108.4A CN201610576108A CN105973954A CN 105973954 A CN105973954 A CN 105973954A CN 201610576108 A CN201610576108 A CN 201610576108A CN 105973954 A CN105973954 A CN 105973954A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
Abstract
The invention relates to the technical field of precise instruments and in particular to an oxygen content calibration gas sampling device and an online oxygen content calibration method. The online oxygen content calibration method provided by the invention comprises the following steps: S1, allowing ambient air to flow into a second preprocessing module by virtue of a pipeline; S2, treating the ambient air flowing into the second preprocessing module by virtue of a filtering device, thereby obtaining clean air; S3, controlling a three-way valve or two two-way valves so that the clean air in the step S2 flows into a calibration pipeline, and measuring the actual oxygen content value of the clean air flowing into the calibration pipeline by virtue of an oxygen sensor, thereby obtaining an oxygen content calibration value in the calibration pipeline; and S4, discharging the clean air measured by an oxygen sensor module in the step S3 by virtue of a sampling pump. The online calibration method provided by the invention is high in accuracy, high in stability and high in controllability, and is safe and reliable; and moreover, whether a zero point of an analyzer drifts can be monitored when the oxygen sensor module is calibrated, so that the practicability is high.
Description
Technical field
The present invention relates to precision instrument technical field, particularly relate to a kind of oxygen content calibration gas and adopt
Sampling device and oxygen content on-line calibration method, be specifically related to a kind of monitoring essence that can improve oxygen content
Spend the oxygen content calibration gas sampling apparatus with stability and oxygen content on-line calibration method.
Background technology
Currently, in conventional flue gas composition in-line analyzer, oxygen content is essential
One of monitoring parameter.And for the detection of oxygen content, generally in normal temperature environment, use electricity
Chemical formula oxygen sensor；And in hot environment, use zirconium oxide formula oxygen sensor.For this two
Plant sensor, during using for a long time, by ambient temperature and pipeline blockage (pipeline gas
Pressure increase) impact, the accuracy of its test result can have greatly changed.In addition,
Owing to the medium (such as electrolyte etc.) required for principle that realizes of sensor can be with its use time
Increase and gradually decrease, so that the long-time stability of oxygen sensor are poor.
From the point of view of the design conditions of existing analyser, it primarily focuses on other gas componants of raising
The monitoring precision of (such as sulfur dioxide, nitric oxide etc.), seldom goes to pay close attention to oxygen content monitoring
Accuracy.Meanwhile, from the point of view of on-the-spot service condition, for improving the test essence of oxygen sensor
Degree, and compensate it and affected by temperature and pressure, generally use the air near polluter to carry out
Oxygen sensor is calibrated, and the oxygen of little configuration standard concentration calibrates oxygen sensor, calibration error
Bigger than normal, degree of accuracy is low, can affect user to the error of measured value at this, is likely to result in tight
Weight consequence.
Summary of the invention
(1) to solve the technical problem that
It is an object of the invention to: a kind of monitoring accuracy that can improve oxygen content and stability are provided
Oxygen content calibration gas sampling apparatus and oxygen content on-line calibration method, to solve existing gas
To there is degree of accuracy in analyser low and stablize poor problem when carrying out and calibrating oxygen sensor.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of oxygen content on-line calibration method,
It includes following operating procedure:
S1, surrounding air flow into the second pretreatment module by pipeline；
After S2, the surrounding air flowed in the second pretreatment module are processed by defecator,
To pure air；
S3, control three-way valve or two two-port valves so that the pure air in step S2 flows into school
Quasi-pipeline, and contained by the actual oxygen of the pure air in oxygen sensor measurement inflow calibration pipeline
Value, obtains calibrating the oxygen content calibration value in pipeline；
S4, by step S3 through oxygen sensor module measure after pure air device by analysis
It is emitted in air by sampling pump afterwards.
Present invention also offers a kind of oxygen content calibration gas sampling apparatus, respectively with control device
And analytical equipment connects, for checking the accuracy of detection of oxygen sensor, it includes valve module, oxygen
Sensor assembly and sampling pump, described valve module is connected with oxygen sensor module, and described oxygen senses
Device module is connected with described sampling pump by described analytical equipment；Described valve module and described control
Device connects, and the input of described valve module connects gas input block to be measured and surrounding air
Input block, described surrounding air input block includes that be connected with described valve module second locates in advance
Reason module, described second pretreatment module is provided with the air inlet being connected with surrounding air and described the
It is provided with defecator in two pretreatment module.
Wherein, it is provided with, in described oxygen sensor module, the pressure sensing being connected with described control device
Device.
Wherein, it is provided with, in described oxygen sensor module, the temperature sensing being connected with described control device
Device.
Wherein, described valve module is three-way valve or two two-port valves.
Wherein, described gas input block to be measured includes that be connected with described valve module first locates in advance
Reason module, described first pretreatment module is provided with the air inlet being connected with gas source to be measured.
Wherein, this oxygen content calibration gas sampling apparatus also includes one end and described gas source to be measured
Connect, the flow feedback adjustment module that the other end is connected with described sampling pump, described flow feedback
Adjustment module is for regulating the flow of the gas to be measured flowing into described gas input block to be measured.
(3) beneficial effect
The technique scheme of the present invention has the advantage that and the invention provides a kind of oxygen content
On-line calibration method, flows into second including following operating procedure: S1, surrounding air by pipeline
Pretreatment module；S2, the surrounding air flowed in the second pretreatment module are by defecator
After reason, obtain pure air；S3, control three-way valve or two two-port valves so that in step S2
Pure air flow into calibration pipeline, and by oxygen sensor measure flow into calibration pipeline in clean
The actual oxygen content value of net air, obtains calibrating the oxygen content calibration value in pipeline；S4, general's step
Rapid S3 passes through sampling pump after pure air device by analysis after oxygen sensor module is measured
It is emitted in air.The application is by utilizing the pure air after the second pretreatment module processes
Oxygen sensor module is calibrated, self is influenced by temperature with online compensation sensor, essence
Exactness is high, improves its stability being monitored oxygen content in gas to be measured for a long time simultaneously, can
Control property is high, safe and reliable.It addition, the oxygen content on-line calibration method operation step that the application provides
The most simple and convenient, and whether the zero point of monitoring analysis instrument while to oxygen sensor modular calibration
Drift about, practical, it is beneficial to be standardized producing and promoting.
Accompanying drawing explanation
Fig. 1 is oxygen content calibration gas sampling apparatus, analytical equipment and the control of the embodiment of the present invention
The structured flowchart of connected mode between device processed；
Fig. 2 is the inside composition structure of the oxygen content calibration gas sampling apparatus of the embodiment of the present invention
Block diagram.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
It is fully described by, it is clear that described embodiment is a part of embodiment of the present invention, and not
It it is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
There is on the premise of making creative work the every other embodiment obtained, broadly fall into the present invention
The scope of protection.
As shown in Figure 1 to Figure 2, the invention provides a kind of oxygen content on-line calibration method, its
Including following operating procedure:
S1, surrounding air flow into the second pretreatment module by pipeline；Wherein, the second pretreatment
Module is provided with the air inlet being connected with surrounding air；
After S2, the surrounding air flowed in the second pretreatment module are processed by defecator,
To pure air；Wherein, pure air refers to unpolluted air, and it forms Ying Yuzheng
Often consistent in air, generally makes comparisons by the local value of air composition, clean to discriminate whether
Clean or contaminated degree；
S3, control three-way valve or two two-port valves so that the pure air in step S2 flows into school
Quasi-pipeline, and contained by the actual oxygen of the pure air in oxygen sensor measurement inflow calibration pipeline
Value, obtains calibrating the oxygen content calibration value in pipeline；Pure air is used to check oxygen sensing
Whether device module is in standard value, and degree of accuracy is high；Control oxygen by control device to sense simultaneously
Device module, improves its stability being monitored oxygen content in gas to be measured for a long time, controllability
Height, safe and reliable；
S4, by step S3 through oxygen sensor module measure after pure air device by analysis
(i.e. aerofluxus) it is emitted in air afterwards by sampling pump.Wherein, analytical equipment and sampling pump it
Between also can be provided with cooling de-watering subelement, by using cooling de-watering subelement and conventional sampling
After pump processes, it is to avoid the use in disposal of pollutants source, improve stability and the controllability of sampling,
Enhance the environmental suitability of system.
Present invention also offers a kind of oxygen content calibration gas sampling apparatus, respectively with control device
And analytical equipment connects, for checking the accuracy of detection of oxygen sensor, it includes valve module, oxygen
Sensor assembly and sampling pump, valve module is connected with oxygen sensor module, and oxygen sensor module is led to
Cross analytical equipment to be connected with sampling pump；Valve module is connected with controlling device, the input of valve module
Connect and have gas input block to be measured and surrounding air input block, surrounding air input block bag
Including the second pretreatment module being connected with valve module, the second pretreatment module is provided with and surrounding air
It is provided with defecator in the air inlet connected and the second pretreatment module.In the present embodiment, mistake
Filter device can configure be used for accordingly according to the composition of site environment pollutants in air and content
Filter the device of tie element；Preferably, valve module can use two two-port valves or a threeway
Valve.Wherein, two-port valve or three-way valve are electromagnetic valve or machinery valve.For adapting to omnidistance high temperature
Sampling, need to be placed in room temperature district by the coil of valve module, and electromagnetic valve body base is placed in high-temperature region.
Specifically, the oxygen content calibration gas analyser that the application provides is pre-through second by utilizing
Oxygen sensor module is calibrated by the pure air after processing module processes, and passes with online compensation
Sensor is influenced by temperature self, and degree of accuracy is high, improves it simultaneously and contains in gas to be measured for a long time
The stability that oxygen amount is monitored, controllability is high, safe and reliable.It addition, what the application provided
Oxygen content calibration gas sampling apparatus, simple in construction, easy to operate, and to oxygen sensor mould
While block calibration, whether the zero point of monitoring analysis device drifts about, practical, be beneficial to into
Column criterion metaplasia is produced and is promoted.
Further, it is provided with in oxygen sensor module and controls the pressure transducer that device is connected.
From existing analysis of experimental data, the output signal strength of oxygen sensor is linear with pressure,
Therefore in oxygen sensor module, pressure transducer is increased, to monitor the pressure of inflow gas in real time
Value, and then the impact that online compensation loine pressure is brought to measurement result.
Further, it is provided with in oxygen sensor module and controls the temperature sensor that device is connected.
For adapting to changeable ambient temperature, the switching time of in good time control valve module, at oxygen sensor
Module increases temperature sensor, to monitor the temperature value of inflow gas in real time, and then is easy to
When varying more than certain limit of ambient temperature, OnNow is calibrated.
Particularly, in the present embodiment, be simultaneously provided with in oxygen sensor module pressure transducer and
Temperature sensor, has not only carried out pressure compensation to oxygen sensor, is simultaneously also beneficial to promote oxygen
The ambient temperature of sensor adapts to ability, and then further increasing the monitoring essence of oxygen sensor
Degree, the correctness of beneficially maintenance test result.
Specifically, in the present embodiment, gas input block to be measured includes being connected with valve module
First pretreatment module, the first pretreatment module is provided with the air inlet being connected with gas source to be measured.
Wherein, for being applicable to the analysis demand of different component, the first pretreatment module of setting can be
Simple filter dirt processes, it is also possible to be to do interference deduction to process.
Further, in the present embodiment, this oxygen content calibration gas sampling apparatus also includes one
End is connected with gas source to be measured, the flow feedback adjustment module that the other end is connected with sampling pump, stream
Amount feedback regulation module is for regulating the flow of the gas to be measured flowing into gas input block to be measured.
Wherein, flow feedback adjusting means can be the three way cock being provided with electromagnetic valve, in conjunction with controlling dress
Put interior gas flow parameter, to realize the particular flow rate flowed in gas input block to be measured
Gas be analyzed.Particularly, flow feedback adjusting means both can be with Non-follow control, it is possible to
To automatically control, need to select corresponding regulative mode according to actual implementation condition.
Particularly, in the present embodiment, control device, oxygen content calibration gas sampling apparatus and
Analytical equipment is detachable module, is applicable not only to on-line monitoring, is simultaneously applicable to just
Take formula monitoring, and by analytical equipment is replaced, can realize being applicable to the overwhelming majority and take out
Modus ponens fume component analysis instrument, enhances the versatility of flue gas analysis system in the application.
Particularly, in the present embodiment, device is controlled all by push-in electrical connector respectively
It is attached with oxygen content calibration gas sampling apparatus and analytical equipment.Easy accessibility, it is simple to and
Analytical equipment described in Shi Genghuan, quickly to realize the analysis of heterogeneity.
Present invention also offers the gas measuring method of a kind of oxygen content calibration gas sampling apparatus,
It includes following operating procedure:
Gas to be measured in S1, gas source to be measured flows into the first pretreatment module；Wherein, first
Pretreatment module is provided with the air inlet being connected with gas source to be measured；
S2, by regulation flow feedback adjustment module so that a part of gas stream in step S1
Entering gas input block to be measured, residual gas is discharged by sampling pump；
S3, open electromagnetic valve so that the gas flowing into gas input block to be measured in step S2 depends on
Secondary after oxygen sensor module, analytical equipment and cooling de-watering subelement process, and by adopting
Sample pump is discharged.Wherein, the application by using cooling de-watering subelement and conventional sampling pump,
Avoid the use in disposal of pollutants source, improve stability and the controllability of sampling, enhance and be
The environmental suitability of system.
In sum, the invention provides a kind of oxygen content on-line calibration method, including grasping as follows
Make step: S1, surrounding air flows into the second pretreatment module by pipeline；S2, inflow second
After surrounding air in pretreatment module is processed by defecator, obtain pure air；S3、
Control three-way valve or two two-port valves so that the pure air in step S2 flows into calibration pipeline,
And by the actual oxygen content value of the pure air in oxygen sensor measurement inflow calibration pipeline,
Oxygen content calibration value in calibration pipeline；S4, will in step S3 through oxygen sensor module measure
After pure air device by analysis after be emitted in air by sampling pump.The application passes through
Utilize the pure air after the second pretreatment module processes that oxygen sensor module is calibrated,
Self being influenced by temperature with online compensation sensor, degree of accuracy is high, improves it the most right simultaneously
The stability that in gas to be measured, oxygen content is monitored, controllability is high, safe and reliable.It addition,
The oxygen content on-line calibration method operating procedure that the application provides is simple and convenient, and is sensing oxygen
While device modular calibration, whether the zero point of monitoring analysis instrument drifts about, practical, is beneficial to
It is standardized producing and promoting.
Last it is noted that above example is only in order to illustrate technical scheme, and
Non-to its restriction；Although the present invention being described in detail with reference to previous embodiment, ability
The those of ordinary skill in territory is it is understood that it still can be to the skill described in foregoing embodiments
Art scheme is modified, or wherein portion of techniques feature is carried out equivalent；And these are repaiied
Change or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical side
The spirit and scope of case.
Claims (7)
1. an oxygen content on-line calibration method, it is characterised in that: include following operating procedure:
S1, surrounding air flow into the second pretreatment module by pipeline；
After S2, the surrounding air flowed in the second pretreatment module are processed by defecator,
To pure air；
S3, control three-way valve or two two-port valves so that the pure air in step S2 flows into school
Quasi-pipeline, and contained by the actual oxygen of the pure air in oxygen sensor measurement inflow calibration pipeline
Value, obtains calibrating the oxygen content calibration value in pipeline；
S4, by step S3 through oxygen sensor module measure after pure air device by analysis
It is emitted in air by sampling pump afterwards.
2. an oxygen content calibration gas sampling apparatus, connects with control device and analytical equipment respectively
Connect, for checking the accuracy of detection of oxygen sensor, it is characterised in that: include that valve module, oxygen pass
Sensor module and sampling pump, described valve module is connected with oxygen sensor module, described oxygen sensor
Module is connected with described sampling pump by described analytical equipment；Described valve module controls dress with described
Putting connection, the input of described valve module connects has gas input block to be measured and surrounding air defeated
Entering unit, described surrounding air input block includes the second pretreatment being connected with described valve module
Module, described second pretreatment module is provided with the air inlet being connected with surrounding air and described second
Defecator it is provided with in pretreatment module.
Oxygen content calibration gas sampling apparatus the most according to claim 2, it is characterised in that:
The pressure transducer being connected with described control device it is provided with in described oxygen sensor module.
4. according to the oxygen content calibration gas sampling apparatus described in Claims 2 or 3, its feature
It is: in described oxygen sensor module, be provided with the temperature sensor being connected with described control device.
Oxygen content calibration gas sampling apparatus the most according to claim 2, it is characterised in that:
Described valve module is three-way valve or two two-port valves.
Oxygen content calibration gas sampling apparatus the most according to claim 2, it is characterised in that:
Described gas input block to be measured includes the first pretreatment module being connected with described valve module, institute
State the first pretreatment module and be provided with the air inlet being connected with gas source to be measured.
Oxygen content calibration gas sampling apparatus the most according to claim 6, it is characterised in that:
Also include that one end is connected with described gas source to be measured, the flow that the other end is connected with described sampling pump
Feedback regulation module, it is defeated that described flow feedback adjustment module is used for regulating the described gas to be measured of inflow
Enter the flow of the gas to be measured of unit.
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| CN201610576108.4A CN105973954A (en) | 2016-07-20 | 2016-07-20 | Oxygen content calibration gas sampling device and online oxygen content calibration method |
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Cited By (9)
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| CN109620597A (en) * | 2018-11-27 | 2019-04-16 | 济南昆仲信息科技有限公司 | Simultaneously automatic control pneumatic and the low atmospheric pressure test device of oxygen content can be set |
| CN110456007A (en) * | 2019-09-12 | 2019-11-15 | 中国原子能科学研究院 | The mechanically calibrated device of oxygen analyzer |
| CN110568047A (en) * | 2019-09-12 | 2019-12-13 | 中国原子能科学研究院 | multifunctional oxygen measuring control device |
| CN112858581A (en) * | 2020-12-31 | 2021-05-28 | 天津森罗科技股份有限公司 | Calibration method for oxygen sensor of high-pressure nitrogen making equipment |
| CN113588883A (en) * | 2021-08-02 | 2021-11-02 | 中科三清科技有限公司 | Ambient air quality monitoring device for automatic calibration |
| CN114113484A (en) * | 2021-11-26 | 2022-03-01 | 上海交通大学 | Real-time oxygen concentration measuring device under liquid drop environment |
| CN114609315A (en) * | 2022-03-16 | 2022-06-10 | 安徽大学 | Online flue gas analysis equipment |
| CN114623254A (en) * | 2020-12-10 | 2022-06-14 | 中国科学院大连化学物理研究所 | High-temperature-resistant corrosion-resistant valve for sampling flue gas and application thereof |
| WO2023035386A1 (en) * | 2021-09-10 | 2023-03-16 | 山东省科学院海洋仪器仪表研究所 | Method and apparatus for calibrating optical dissolved oxygen sensor |
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| CN113588883A (en) * | 2021-08-02 | 2021-11-02 | 中科三清科技有限公司 | Ambient air quality monitoring device for automatic calibration |
| WO2023035386A1 (en) * | 2021-09-10 | 2023-03-16 | 山东省科学院海洋仪器仪表研究所 | Method and apparatus for calibrating optical dissolved oxygen sensor |
| CN114113484A (en) * | 2021-11-26 | 2022-03-01 | 上海交通大学 | Real-time oxygen concentration measuring device under liquid drop environment |
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