CN100378450C - In-position gas analyzing system with in-position calibrating function - Google Patents
In-position gas analyzing system with in-position calibrating function Download PDFInfo
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- CN100378450C CN100378450C CNB2005100607797A CN200510060779A CN100378450C CN 100378450 C CN100378450 C CN 100378450C CN B2005100607797 A CNB2005100607797 A CN B2005100607797A CN 200510060779 A CN200510060779 A CN 200510060779A CN 100378450 C CN100378450 C CN 100378450C
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Abstract
The present invention discloses an on-site gas analyzing system with an on-site calibrating function. The present invention has the technical scheme that the on-site gas analyzing system comprises a light emitting device, a light receiving device, a signal analyzing device, a mechanical connection structure and a measuring pipe, wherein the light emitting device and the light receiving device are connected with a measured gas pipeline by matching. The present invention also comprises an additional pipe for a basic closed pipeline which is formed with the measuring pipe and is isolated from the measured gas on a measuring light path, a controlling device for controlling the basic closed pipeline which is formed from the additional pipe and the measuring pipe and is isolated by the measured gas and a gas replacing device composed of a known concentration gas air source, a valve and a gas venting joint. The gas venting joint is communicated with the formed basic closed pipeline. The present invention has the advantages of simple structure, low requirement for manufacture and installation precision, convenient installation and debugging and real-time on-site calibration and is suitable for carrying out on-site measurement for the process gas in a gas pipeline and carrying out on-site calibration for the gas analyzing system.
Description
Technical field
The present invention relates to formula gas analysis system on the throne, particularly a kind of formula gas analysis system on the throne with calibrating function on the throne.
Background technology
Formula gas analysis system on the throne is different with traditional sampling mode gas analysis system, it does not need sampling and preprocessing process, overcome a lot of defectives of traditional sampling mode gas analysis system, it is simple to have system, the reliability height, the measurement response speed is fast, the analysis precision height, advantage such as concentration that can measurement gas and speed is at modern industry, scientific research, fields such as environmental protection have obtained application more and more widely.Formula gas analysis system on the throne can adopt multiple absorption spectrum technology to realize, as Non-Dispersive Infra-red (NDIR) spectrum (NDIR) technology, and differential optical absorption spectrum (DOAS) technology, tunable semiconductor laser absorption spectrum (TDLAS) technology.
Formula gas analysis system on the throne has following several structural shape:
(1) formula gas analysis system on the throne is shown in Figure 1, and light emitting devices 1 and optical pickup apparatus 9 comprise that by mechanical connecting structure flange connects body 2 valves 3 and connects on tested process gas pipeline 4.Also be provided with the light path adjustment structure on the mechanical connecting structure, the combination of elastic caoutchouc O shape circle and fastening bolt 10 is used to regulate light emitting devices 1 to the light path between the optical pickup apparatus 9. Inner core 13,14 is installed on mechanical connecting structure, and distance is to measure light path between two inner cores.When containing particles such as dust, drop at tested process gas, also dispose the purging system of forming by ventilating joint 41, valve 45, gas pipeline and source purge gas 53.If when containing particle such as more dust, drop in the tested process gas, can be in tested process gas pipeline measuring beam provided upstream one block body device, stop that particles such as dust, drop arrive the transmittance that measuring beams improve measuring beam.
(2) formula gas analysis system on the throne comprises light emission, receiving trap, signal analysis device, the light device of turning back.Open two holes on tested gas pipeline, electroplating equipment wielding machine syndeton such as flange on the hole, light emission, receiving trap and the light device of turning back is installed on the tested gas pipeline by mechanical connecting structure respectively.Contain particles such as dust, drop in tested process gas, system also is furnished with purging system.
(3) formula gas analysis system on the throne comprises light emission and optical pickup apparatus, signal analysis device and measuring sonde.On tested gas pipeline, have a hole, electroplating equipment wielding machine syndeton such as flange on the hole, light emission, receiving trap are installed on the tested gas pipeline by mechanical connecting structure, measuring sonde stretches in the tested process gas pipeline, the light device of turning back is installed in the measuring sonde end, and measuring sonde is provided with opening and makes process air-flow and measuring beam effect.Contain particles such as dust, drop in tested process gas, system also is furnished with purging system.
The aging meeting of light source and electronic devices and components etc. causes the slow drift of analytic system parameter, and therefore the accuracy that influence is measured need periodically demarcate formula gas analysis system on the throne.There is a few to have the gas analysis system on the throne of calibrating function on the throne at present.
The patent No. is that 5517314 US Patent specification discloses a kind of gas analysis system on the throne with calibrating function on the throne, comprises light emitting devices, demarcates and the measurement component road optical pickup apparatus, analytical equipment; Principle of work is as follows: the light that light source sends is reflected into two bundle directional lights through two concave mirrors, pass through closed conduct and measurement component road respectively, enter into optical pickup apparatus, reflect into optical receiver, send the analytical equipment analysis by optical fiber afterwards through two concave mirrors.On demarcating light path, outside the tested gas pipeline marked gas chamber is arranged, chamber also can be placed in the tested process gas pipeline and allow the demarcation light beam pass through, the tested gas of zero gas or concentration known charges into chamber by valve control, and purge gas feeds the measurement component road by ventilating joint; When the needs timing signal, the computer control motor is seated in block body and measures on the light path, opens valve, charges into the tested gas of zero gas or concentration known at chamber, demarcates the light of light path and sends into analytical equipment by receiver.During measurement, the computer control motor is seated in block body and demarcates on the light path, and measuring beam is sent into analytical equipment by receiver.
This patented technology can realize demarcation on the throne, but the device complexity of this technology, such as: in the Optical Transmit Unit the inside, the light that light source sends becomes two bundle directional lights through the concave mirror back reflection, reflect into a receiver by concave mirror again, this exigent machining and assembly precision at this two bundles directional light of light receiving unit; Have, demarcate and measure and need independently carry out in two pipelines, can not effectively utilize the measurement component road and demarcate, causing increases difficulty when installing and debug; Also have,, block body well to block measuring beam, enter optical receiver, reduce stated accuracy otherwise have measuring beam at timing signal.
Also have another to have the gas analysis system on the throne of calibrating function on the throne, it is on existing formula gas analysis system on the throne basis, is being provided with closed chamber near light emitting devices or optical pickup apparatus place.When the tested process gas pipelines of situation such as running into maintenance need be stopped the supple of gas or steam, the tested gas that charges into zero gas and concentration known in chamber respectively carried out zero setting and demarcation.This technology can not be used at any time, because situations such as pipeline maintenance seldom run into after all, can not just stop the supple of gas or steam at the needs timing signal, otherwise cost is too big; Have, even pipeline is stopped the supple of gas or steam, tested gas pipeline the inside also can residual tested process gas, can influence the precision of demarcation so again.
Summary of the invention
The invention provides a kind of gas analysis system on the throne with calibrating function on the throne, overcome existing gas analysis system device complexity on the throne, processing and installation accuracy with calibrating function on the throne require high, shortcoming such as the Installation and Debugging difficulty is big.
The technical solution used in the present invention is: a kind of formula gas analysis system on the throne with calibrating function on the throne, comprise light emitting devices, optical pickup apparatus, signal analysis device, mechanical connecting structure and measuring tube, light emitting devices and optical pickup apparatus connect on tested gas pipeline by mechanical connecting structure; Described analytic system also comprises tube-carrier, control device and gas displacement apparatus; Wherein, described measuring tube comprises first measuring tube and second measuring tube, the socket slidably of described tube-carrier is installed on described first measuring tube, the external part of described tube-carrier and second measuring tube connect in tested gas pipeline and are measuring formation and tested gas-insulated closed conduit on the light path, make gas analysis system be in demarcation or measurement state by making described tube-carrier put in second measuring tube or being retracted into described first measuring tube; Described control device is used to control described tube-carrier and second measuring tube forms and tested gas-insulated closed conduit, and the gas displacement device of being made up of concentration known gas source of the gas 40, valve 45 and ventilating joint 41 is communicated with the closed conduit that forms.
As preferred a kind of scheme: control device is a pneumatic means: the two ends in first measuring tube are equipped with detachable end block 52, and keep sealing with tube-carrier, and the outer rim of tube-carrier has a projection 54, projection and the sealing of first measuring tube; Between the detachable end block 52 at projection 54 and two ends is two annular seal spaces, has ventilating joint 42,43 to be communicated with two annular seal spaces respectively on first measuring tube, drives source of the gas 49 and connects by valve 46 and ventilating joint 42,43.
Further, the chamber 8 of a sealing is arranged in the junction that optical pickup apparatus and flange connect body, ventilating joint 44,48 is arranged on the chamber, demarcate source of the gas 57 and be connected with ventilating joint 44 by valve 47.
Further again, temperature sensor and pressure transducer are installed on measuring tube.
Compare with existing formula gas analysis system on the throne with calibrating function on the throne, beneficial effect of the present invention is: (1) device is simple, utilizes the measurement component road to carry out demarcation on the throne; (2) requirement of the assembly precision of device is low than prior art, and Installation and Debugging are easy; (3) whole calibrating procedure has fully taken into account the influence of temperature and pressure, the stated accuracy height; (4) the demarcation light path is longer, and calibration result is reliable; (5) can accomplish real-time demarcation on the throne; (6) end block between tube-carrier and the Outer Tube can be dismantled, and therefore can also pull down tube-carrier and safeguard.
Description of drawings
Fig. 1 is a kind of structural representation of existing formula gas analysis system on the throne;
Fig. 2 is the structural representation of a kind of implementation of the present invention;
Fig. 3 is the structural representation of second kind of implementation of the present invention;
Fig. 4 is the structural representation of the third implementation of the present invention;
Fig. 5 is a kind of diagrammatic cross-section of controllable device;
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done further detailed description.
Embodiment 1:
As Fig. 2, shown in Figure 5, gas analysis system on the throne is Non-Dispersive Infra-red (NDIR) spectrum (NDIR) gas analysis system.Light emitting devices 1 and optical pickup apparatus 9 comprise that by mechanical connecting structure flange connects body 2 valves 3 and connects on tested process gas pipeline 4.Connecting body 2 middle O shapes circles by the 10 extruding flanges of the bolt on the adjusting mechanical connecting structure can regulate to the light path between the optical pickup apparatus 9 light emitting devices 1.
Optional feature is that tube-carrier 5 is installed in first measuring tube, 13 inside that are connected with mechanical connecting structure, and tube-carrier 5 usefulness pneumatic mode drive, and the tube-carrier xsect is circular, and this structure is easy to processing and installs.Control device is: detachable end block 52 is installed on the inwall of first measuring tube 13, has O shape circle 51 to make the detachable end block and first measuring tube 13 and tube-carrier 5 keep sealing above; The outer rim of tube-carrier has a projection 54, and 13 sealings of O shape circle 58 and first measuring tube are arranged on the projection; Projection 54 is divided into two chambeies that link to each other with ventilating joint 42,43 respectively to the chamber that forms between the tube-carrier 5 and first measuring tube 13.Valve 46 links to each other with ventilating joint 42,43, charges into to an above-mentioned chamber by valve 46 control that zero gas removes to drive tube-carrier 5 flexible (specifically flexible direction depends on a chamber inflation, another chamber exhaust) in zero gas and another chamber of emptying.The gas displacement device is made of concentration known gas source of the gas 40 (comprising zero gas and gas), valve 45 and ventilating joint 41.
The course of work is: the measuring beam 11 that light emitting devices 1 sends enters into optical pickup apparatus 9, received signal feed signals analytical equipment after passing internal holes, tube-carrier 5 and the tested gas 7 of mechanical connecting structure and inner core 13,14.During measurement, in control tube-carrier 5 indentations first measuring tube 13, measuring beam 11 passes tested process air-flow 7; For avoiding particles such as dust, drop in the tested process air-flow to pollute optical window on light emitting devices 1 and the optical pickup apparatus 9, by-pass valve control 45 passes through ventilating joint 41 to mechanical connecting structure and inner core 13,14 aperture, inside charges into than the big zero gas of pressure in the tested process gas pipeline, the process air-flow of making can't flow into inner core 13,14, this has also guaranteed to measure the accuracy of light path simultaneously.Timing signal, control tube-carrier 5 makes it to enter in second measuring tube 14; At this moment, the tube-carrier that stretches out 5 intactly centers on the measuring beams of measuring in the light path scope, and tube-carrier 5 and first measuring tube 13, second measuring tube 14 form a basic closed conduit that centers on measuring beam 11; Charging in this basic closed conduit than the big zero gas of pressure in the tested process gas pipeline by ventilating joint 41, is the uncertain gas displacement of concentration in this basic closed conduit zero gas, then to the analytic system operation of returning to zero; Then by-pass valve control 45 charges in this basic closed conduit than the big gas of pressure in the tested process gas pipeline by ventilating joint 41, is gas displacement in this basic closed conduit gas, then analytic system is carried out proving operation.After demarcation is finished, by-pass valve control 45 passes through ventilating joint 41 to mechanical connecting structure and inner core 13,14 aperture, inside charges into than the big zero gas of pressure in the tested process gas pipeline, controls tube-carrier simultaneously and makes it to make analytic system revert to the measurement state in indentation first measuring tube 13.
As Fig. 3, shown in Figure 5, embodiment 1 described analytic system on the throne with calibrating function on the throne is being provided with a gas chamber 8 near optical pickup apparatus 9 places, ventilating joint 44,48 is arranged on the chamber, demarcate source of the gas 57 (comprising zero gas and gas) and be connected with ventilating joint 44 by valve 47.
The course of work is: during measurement, in the control tube-carrier 5 indentation light emitting devices side inner cores 13, the zero gas that pressure is big in charging into than tested process gas pipeline by ventilating joint 41 in the aperture, inside of mechanical connecting structure and inner core 13,14 is not contaminated with the protection optical window, guarantees to measure the accuracy of light path simultaneously; In chamber 8, charge into zero gas by valve 47 controls.Timing signal, control tube-carrier 5 puts in second measuring tube 14, charges into the zero gas bigger than pressure in the tested gas pipeline, the operation of returning to zero then by ventilating joint 41; Then in chamber 8, charge into gas, carry out proving operation then by valve 47 controls.After demarcation is finished, control in tube-carrier 5 indentations first measuring tube 13, and in chamber 8, charge into zero gas, make analytic system revert to the measurement state by valve 47 controls.
Embodiment 3:
As Fig. 4, shown in Figure 5, light emission, receiving trap 71 and light are turned back device 72 by mechanical connecting structure, comprise that flange connects body 2 valves 3 and connects on tested process gas pipeline 4.Other are identical with embodiment 3 described gas analysis systems.
Claims (4)
1. formula gas analysis system on the throne with calibrating function on the throne, comprise light emitting devices, optical pickup apparatus, signal analysis device, mechanical connecting structure and measuring tube, light emitting devices and optical pickup apparatus connect on tested gas pipeline by mechanical connecting structure; It is characterized in that: described analytic system also comprises tube-carrier, control device and gas displacement apparatus;
Wherein, described measuring tube comprises first measuring tube and second measuring tube, the socket slidably of described tube-carrier is installed on described first measuring tube, the external part of described tube-carrier and second measuring tube connect in tested gas pipeline and are measuring formation and tested gas-insulated closed conduit on the light path, make gas analysis system be in demarcation or measurement state by making described tube-carrier put in second measuring tube or being retracted into described first measuring tube;
Described control device is used to control described tube-carrier and second measuring tube forms and tested gas-insulated closed conduit, and the gas displacement device of being made up of concentration known gas source of the gas (40), valve (45) and ventilating joint (41) is communicated with the closed conduit that forms.
2. the formula gas analysis system on the throne with calibrating function on the throne according to claim 1, it is characterized in that: control device is a pneumatic means: the two ends in first measuring tube are equipped with detachable end block (52), and keep sealing with tube-carrier, the outer rim of tube-carrier has a projection (54), projection and the sealing of first measuring tube; Between the detachable end block (52) at projection (54) and two ends is two annular seal spaces, has ventilating joint (42,43) to be communicated with two annular seal spaces respectively on first measuring tube, drives source of the gas (49) and connects by valve (46) and ventilating joint (42,43).
3. the formula gas analysis system on the throne with calibrating function on the throne according to claim 1 and 2, it is characterized in that: the chamber (8) that a sealing is arranged in the junction that optical pickup apparatus and flange connect body, ventilating joint (44 is arranged on the chamber, 48), demarcating source of the gas (57) is connected with ventilating joint (44) by valve (47).
4. the formula gas analysis system on the throne with calibrating function on the throne according to claim 1 and 2 is characterized in that: temperature sensor and pressure transducer are installed on measuring tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100607797A CN100378450C (en) | 2005-09-15 | 2005-09-15 | In-position gas analyzing system with in-position calibrating function |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100607797A CN100378450C (en) | 2005-09-15 | 2005-09-15 | In-position gas analyzing system with in-position calibrating function |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101473943A Division CN101281129B (en) | 2005-09-15 | 2005-09-15 | On-position type gas analysis system with on-position calibration function |
| CN2007101473939A Division CN101281128B (en) | 2005-09-15 | 2005-09-15 | On-position type gas analysis system with on-position calibration function |
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| CN1740775A CN1740775A (en) | 2006-03-01 |
| CN100378450C true CN100378450C (en) | 2008-04-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441173B (en) * | 2007-11-21 | 2010-10-06 | 重庆川仪自动化股份有限公司 | Laser absorption spectrum trace amount gas analysis method and apparatus using the same |
| CN102661921B (en) * | 2012-05-24 | 2014-03-26 | 南京国电环保科技有限公司 | Full-system online calibration device of flue gas analyzer utilizing direct measurement method |
| CN102734414B (en) * | 2012-05-24 | 2014-09-10 | 南京国电环保科技有限公司 | Planar transmission steering device |
| CN102809543A (en) * | 2012-07-23 | 2012-12-05 | 河南平高电气股份有限公司 | Gas concentration detection system and detection equipment and detection precision adjustment mechanism thereof |
| CN103487593B (en) * | 2013-09-18 | 2014-06-18 | 中国科学院微电子研究所 | Gas analysis device and method |
| CN105388112A (en) * | 2015-12-15 | 2016-03-09 | 郑州光力科技股份有限公司 | Diffusion-type laser gas concentration measuring tube and measuring system for high temperature environment |
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| US4381153A (en) * | 1980-08-28 | 1983-04-26 | The Babcock & Wilcox Company | Opacity monitor |
| CN2213335Y (en) * | 1994-12-16 | 1995-11-22 | 张尧海 | Portable universal infrared gas analyser |
| US5517314A (en) * | 1991-12-04 | 1996-05-14 | Opsis Ab | Optical analysing equipment for determining parameters of gaseous substances flowing through a duct |
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2005
- 2005-09-15 CN CNB2005100607797A patent/CN100378450C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4381153A (en) * | 1980-08-28 | 1983-04-26 | The Babcock & Wilcox Company | Opacity monitor |
| US5517314A (en) * | 1991-12-04 | 1996-05-14 | Opsis Ab | Optical analysing equipment for determining parameters of gaseous substances flowing through a duct |
| CN2213335Y (en) * | 1994-12-16 | 1995-11-22 | 张尧海 | Portable universal infrared gas analyser |
Non-Patent Citations (1)
| Title |
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| 半导体激光工业现场在线气体分析仪的研制及其性能分析. 王欣等.现代仪器，第5期. 2004 * |
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Address after: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Patentee after: Focused Photonics (Hangzhou) Inc. Address before: Hangzhou City, Zhejiang province Binjiang District 310012 shore road 1180 No. 3 Patentee before: Juguang Sci. & Tech. (Hangzhou) Co., Ltd. |