CN100489536C - Integrated probe used for gas on-line analysis - Google Patents

Integrated probe used for gas on-line analysis Download PDF

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Publication number
CN100489536C
CN100489536C CNB2007100682918A CN200710068291A CN100489536C CN 100489536 C CN100489536 C CN 100489536C CN B2007100682918 A CNB2007100682918 A CN B2007100682918A CN 200710068291 A CN200710068291 A CN 200710068291A CN 100489536 C CN100489536 C CN 100489536C
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gas
integrated probe
assembly
inlet channel
passage
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CNB2007100682918A
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CN101042409A (en
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王健
于志伟
孟晓
杨松杰
韩双来
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Focused Photonics Hangzhou Inc
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王健
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Abstract

This invention discloses one integral detector for gas online analysis, which comprises test head and its connection sample tube, wherein, the said test head is set with test chamber and its gas-in channel an exit channel; the said measurement chamber two sides are fixed with optical parts; the said exit channel is set with radio device composed of gas absorb channel, spray gas channel and incidence channel set inside exit channel; the incidence channel and absorptive channel is at acute angle.

Description

A kind of integrated probe that is used for gas on-line analysis
Technical field
The present invention relates to a kind of gas measurement device, more particularly, relate to a kind of integrated probe that is used for gas on-line analysis.
Background technology
In industrial processes, can produce or use a lot of gases, these gases are carried out on-line analysis for realizing that production technology optimization, security control or environment protection emission control are most important.For example in Crouse's recovery technology of sulfur, reach optimum efficiency in order to make the sulphur recovery process, need the mol ratio of sulfuretted hydrogen and sulfur dioxide gas in the measuring channel, and feed back to DCS air inflow is controlled, making described mol ratio is 2:1.Measuring method commonly used is, mode as the employing of Brimstone company, as shown in Figure 1, use probe 52 sampling from tested pipeline 51, be passed into the sulfur vapor that complicated pretreatment system 53 is removed wherein through long gas line then, and then feeding measurement in the measuring chamber 54, optical device is installed in the both sides of measuring chamber 54.Be ejector 6 to be installed in the described system, thereby extract the gas in the tested pipeline 51 out in the downstream of measuring chamber 54.Described ejector 6 comprises suction gas passage 61, sprays the gas passage 63 and the passage 62 of going into to emanate, and the described passage 62 of going into to emanate is collinear with injection gas passage 63, is 90 ° and suck gas passage 61 with the angle that sprays gas passage 63.In order to reduce the danger that gas circuit condensation sulphur stops up, also need gas circuit (comprising gas line, pretreatment system, measuring chamber, ejector etc.) is heated to higher temperature, as 150 ℃, comprise zeroing and demarcation gas line in the system.
Technique scheme has following shortcoming: 1) utilize discrete device to realize tested gas sampling, pipeline transmission, sulfur vapor filtration, concentration analysis, flow back to pipeline at last, system adopts omnidistance companion's heat, complex structure, and reliability is low; 2) gas in the tested pipeline will could feed measuring chamber through long gas pipeline, and response speed is slow; 3) the suction gas passage of ejector is 90 ° with the angle that sprays the gas passage, and sulphur residual in the gas easily stops up ejector, causes system normally to sample; 4) easily deposit the sulphur powder on the optical device of measuring chamber, can't remove, need regularly to clean, maintenance workload is big.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides a kind of simple and compact for structure, reliability is high, response speed is fast, be difficult for to stop up, the integrated probe that is used for gas on-line analysis that the system maintenance amount is little.
The objective of the invention is to be achieved by following technical proposals:
A kind of integrated probe that is used for gas on-line analysis, comprise measuring head and be attached thereto the sampling pipe that connects, be provided with measuring chamber in the described measuring head and be attached thereto logical inlet channel and outlet passageway, optical device is installed in the both sides of described measuring chamber, measuring beam arrives another optical device after passing the optical device of a side and entering measuring chamber; On the described outlet passageway fluidic device is installed, described fluidic device comprises suction gas passage, sprays the gas passage and the passage of going into to emanate, described suction gas passage and spray the gas passage and be located in the described outlet passageway, described go into to emanate passage and the interchannel angle of described suction gas are acute angle.
Described measuring head comprises first assembly and second assembly, the both sides of first assembly are installed second assembly and sampling pipe respectively, described measuring chamber is located in described second assembly, described fluidic device is located in described first assembly, and described inlet channel, outlet passageway are located in first assembly and second assembly.
As preferably, described inlet channel leads directly to, and described outlet passageway leads directly to.
As preferably, blow device also is installed on the described measuring chamber, described blow device has air intake opening and gas outlet, and described optical device is aimed in described gas outlet.
Be provided with the scrubbing passage that is communicated with described inlet channel, outlet passageway respectively on the top of described measuring chamber.
As preferably, an end of described inlet channel also is mounted on the draft tube in the sampling pipe, and described draft tube is crooked or tilts.
As preferably, the air-flow stop valve is installed on described inlet channel and outlet passageway.
As preferably, the sidepiece of described measuring chamber also is provided with and adds zone of heat liberation.
As preferably, an end of described sampling pipe is provided with the otch of inclination, the flow direction of described otch gas in the tested gas pipeline.
As preferably, filtrator is installed also on the described inlet channel.
Compared with prior art, the present invention has following advantage: 1) system is simple, the integrated probe of compact conformation is directly installed on the tested pipeline, need not the complicated pretreatment system, do not need simultaneously omnidistance companion's heat yet, and only need to accompany heat to measuring chamber, to avoid condensate moisture in the gas on optical device; 2) response speed is fast, and the gas in the tested pipeline only needs can arrive measuring chamber through very short sampling pipe; 3) the suction gas passage of ejector has guaranteed that with spraying the interchannel acute angle design of gas gas communication is smooth and easy, and residual particles in the gas such as sulphur are difficult for stopping up outlet passageway; 4) system maintenance amount is little, and the filtrator on the inlet channel is with most residual particles such as sulphur filtering, and the residual particles such as the sulphur that enter measuring chamber on a small quantity purge removal automatically by blow device, can also be by the closed gas flow stop valve, pull down assembly and safeguard.
Description of drawings
Fig. 1 is a kind of prior art constructions synoptic diagram;
Fig. 2 is a kind of structural representation that is used for the integrated probe of gas on-line analysis of the present invention;
Fig. 3 is the structural representation of the blow device in Fig. 2 integrated probe;
Fig. 4 is the structural representation of another kind of fluidic device.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment 1:
As shown in Figure 2, a kind of integrated probe that is used for gas on-line analysis, be applied in the Sulfur Recovery Unit process tail gas sulphur ratio Analysis, comprise sampling pipe 1, measuring head, described measuring head comprises first assembly 2 and second assembly 3 that is assembled together with it.Described first assembly 2 is connected with described sampling pipe 1, and described sampling pipe 1 is installed on the tested pipeline 11.
Be provided with measuring chamber 38 and be attached thereto logical inlet channel 31, outlet passageway 32 in described second assembly 3.Optical device 35,36 is installed in the both sides of described measuring chamber 38.The sidepiece of measuring chamber 38 also is provided with and adds zone of heat liberation 39.Also be provided with respectively the scrubbing passage 33,34 that connects with described inlet channel 31, outlet passageway 32 in described second assembly 3, the import of described scrubbing passage 33,34 is sealed at ordinary times.As shown in Figure 3, at the sidepiece of second assembly 3 blow device 4 is installed also, described blow device 4 has air intake opening 41 and gas outlet 42,43.Described gas outlet 42 is tiltedly facing to described optical device 35, and described gas outlet 43 is tiltedly facing to optical device 36.
As Fig. 2, the outlet passageway 22 that is provided with the inlet channel 21 that connects with described inlet channel 31 in described first assembly 2, connects with described outlet passageway 32.Wherein, on described inlet channel 21, also be provided with air-flow stop valve 23, on outlet passageway 22, also be provided with air-flow stop valve 24.Also be provided with fluidic device in described first assembly 2, described fluidic device comprises suction gas passage 26, sprays the gas passage 27 and the passage 25 of going into to emanate, described suction gas passage 26 and injection gas passage 27 are located in the straight-through outlet passageway 22, be beneficial to the unimpeded of gas, avoid crooked gas flow path to cause sulphur to stop up stream.The angle of described go into to emanate 26 in passage 25 and described suction gas passage is an acute angle.The air intake opening 37 of the described passage 25 of going into to emanate is located on second assembly 3.Also be provided with the filtrator of being convenient to take out 29 on the described inlet channel 21, be used for filtering out the sulphur of gas.
Terminal crooked draft tube 28 is installed in the described sampling pipe 1, and described draft tube 28 is communicated with described inlet channel 21.The bending of draft tube 28 ends helps avoiding the sulphur in the gas directly to be brought into inlet channel 21,31 by air-flow.One end of described sampling pipe 1 is provided with the otch of inclination, described otch in the tested pipeline gas flow to 12, avoid the dust in the tested pipeline 11 to enter sampling pipe 1.
The course of work of above-mentioned integrated probe is: during the mol ratio of sulfuretted hydrogen and sulphuric dioxide, described air-flow stop valve 23,24 is opened in needing measuring channel 11, described fluidic device work, and pressure-air enters in the passage 25 of emanating from described air intake opening 37.At this moment, gas in the tested pipeline 11 enters under the effect of fluidic device in the described sampling pipe 1, most sulfur vapor in the gas is condensed and at the action of gravity tested pipeline that falls back, gas enters in the inlet channel 21 by terminal crooked draft tube 28 then, entered in the described measuring chamber 38 by inlet channel 31 after described filtrator 29 filters, the described fluid that adds in the zone of heat liberation 39 heats the gas in the described measuring chamber 38.Measuring beam is received after passing tested gas in the optical device 36, measuring chamber 38, optical device 35, thereby by analyzing the mol ratio that is recorded measuring chamber 38 interior sulfuretted hydrogen and sulphuric dioxide by the spectrum after the tested gas absorption, gas in the measuring chamber 38 is expelled back in the described sampling pipe 1 by outlet passageway 22,32, and then flows back in the tested pipeline.
After described integrated probe work a period of time, can deposit a spot of sulphur powder on the described optical device 35,36, at this moment, described blow device 4 work, sweep gas tiltedly purges described optical device 35,36 from described gas outlet 42,43, thereby blows off attached to the sulphur powder on the optical device 35,36.In the time of can't using above-mentioned purging mode thoroughly to remove when depositing more amount sulphur powder in measuring chamber 38 or inlet channel 21,31 or the outlet passageway 22,32, can close described air-flow stop valve 24, purge inlet channel 21,31 then; Close described air-flow stop valve 23 then, purge outlet passageway 22,32.When if aforesaid way still can't be removed fully, can open described scrubbing passage 33,34, use the scrubbing part to remove inner sulphur powder or sulphur liquid.When second assembly 3 need be safeguarded, close described air-flow stop valve 23,24, pull down second assembly 3 and safeguard that the gas in the tested pipeline 11 can not leak yet this moment.When described filtrator 29 needs to clean, close described air-flow stop valve 23,24, extract described filtrator 29 out and clean.
Embodiment 2:
A kind of integrated probe that is used for gas on-line analysis is applied in the PVC industry, is used for the ducted HCl concentration of on-line measurement.As different from Example 1, the outlet passageway in the described measuring head does not lead directly to; As shown in Figure 4, injection gas passage 53 in the fluidic device and the angle of going into to emanate between the passage 51 are still acute angle, but suction gas passage 52 is no longer collinear with injection gas passage 53, but an obtuse angle is arranged.
It is pointed out that above-mentioned embodiment should not be construed as limiting the scope of the invention.As in an embodiment, the present invention is applied in the measurement of the HCl in Sulfur Recovery Unit process tail gas sulphur ratio Analysis, the PVC industry, can also be applied in certainly in other field, as the measurement of sulphuric dioxide, NOx in the fume emission continuous monitoring etc.Key of the present invention is, the integrated probe that is used for gas on-line analysis comprises measuring head and is attached thereto the sampling pipe that connects, be provided with measuring chamber in the described measuring head and be attached thereto logical inlet channel and outlet passageway, optical device is installed in the both sides of described measuring chamber; On the described outlet passageway fluidic device is installed, described fluidic device comprises suction gas passage, sprays the gas passage and the passage of going into to emanate, described suction gas passage and spray the gas passage and be located in the described outlet passageway, described go into to emanate passage and the interchannel angle of described suction gas are acute angle.Under the situation that does not break away from spirit of the present invention, any type of change that the present invention is made all should fall within protection scope of the present invention.

Claims (10)

1, a kind of integrated probe that is used for gas on-line analysis, it is characterized in that: described integrated probe comprises measuring head and is attached thereto the sampling pipe that connects, be provided with measuring chamber in the described measuring head and be attached thereto logical inlet channel and outlet passageway, optical device is installed in the both sides of described measuring chamber, measuring beam arrives another optical device after passing the optical device of a side and entering measuring chamber; On the described outlet passageway fluidic device is installed, described fluidic device comprises suction gas passage, sprays the gas passage and the passage of going into to emanate, described suction gas passage and spray the gas passage and be located in the described outlet passageway, described go into to emanate passage and the interchannel angle of described suction gas are acute angle.
2, integrated probe according to claim 1, it is characterized in that: described measuring head comprises first assembly and second assembly, the both sides of first assembly are installed second assembly and sampling pipe respectively, described measuring chamber is located in described second assembly, described fluidic device is located in first assembly, and described inlet channel, outlet passageway are located in first assembly and second assembly.
3, integrated probe according to claim 1 and 2 is characterized in that: described inlet channel leads directly to, and described outlet passageway leads directly to.
4, integrated probe according to claim 1 and 2 is characterized in that: blow device also is installed on the described measuring chamber, and described blow device has air intake opening and gas outlet, and described optical device is aimed in described gas outlet.
5, integrated probe according to claim 1 and 2 is characterized in that: be provided with the scrubbing passage that is communicated with described inlet channel, outlet passageway respectively on the top of described measuring chamber.
6, integrated probe according to claim 1 and 2 is characterized in that: an end of described inlet channel also is mounted on the draft tube in the sampling pipe, and described draft tube is crooked or tilts.
7, integrated probe according to claim 1 and 2 is characterized in that: the air-flow stop valve is installed on described inlet channel and outlet passageway.
8, integrated probe according to claim 1 and 2 is characterized in that: the sidepiece of described measuring chamber also is provided with and adds zone of heat liberation.
9, integrated probe according to claim 1 and 2 is characterized in that: an end of described sampling pipe is provided with the otch of inclination, the flow direction of described otch gas in the tested gas pipeline.
10, integrated probe according to claim 1 and 2 is characterized in that: filtrator also is installed on the described inlet channel.
CNB2007100682918A 2007-04-30 2007-04-30 Integrated probe used for gas on-line analysis Active CN100489536C (en)

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Families Citing this family (10)

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CN102279119B (en) * 2011-03-23 2014-12-10 上海北分仪器技术开发有限责任公司 High temperature smoke detecting and sampling system
CN102692442B (en) * 2011-03-23 2014-07-02 上海北分仪器技术开发有限责任公司 Thermal power plant high-temperature flue gas detection sampling system
CN103149056A (en) * 2013-01-31 2013-06-12 上海凯源仪器技术有限公司 High-temperature smoke detecting and sampling device
CN104266991A (en) * 2014-10-22 2015-01-07 中山欧麦克仪器设备有限公司 Portable gas detector
CN106596200B (en) * 2016-12-29 2020-07-07 中国环境科学研究院 Airborne sampling head capable of preventing water from flowing backwards and application thereof
CN106525518B (en) * 2016-12-29 2020-07-07 中国环境科学研究院 Airborne sampling system capable of automatically changing pressure of sampling system and application thereof
CN106769251B (en) * 2016-12-29 2020-07-31 中国环境科学研究院 Automatic sampling system and application thereof
CN106596201B (en) * 2016-12-29 2020-07-07 中国环境科学研究院 Airborne sampling head capable of preventing water vapor from condensing and application thereof
CN107271227A (en) * 2017-07-20 2017-10-20 江苏舒茨测控设备股份有限公司 A kind of non-isometric sampling backflow double hose sampling probe
JP6933053B2 (en) * 2017-08-24 2021-09-08 株式会社島津製作所 Gas sampling probe

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Patentee before: Juguang Sci. & Tech. (Hangzhou) Co., Ltd.