CN101532924A - Filtering, dehumidifying and sampling probe for fixed pollution source smoke discharge and working method thereof - Google Patents
Filtering, dehumidifying and sampling probe for fixed pollution source smoke discharge and working method thereof Download PDFInfo
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- CN101532924A CN101532924A CN200910025297A CN200910025297A CN101532924A CN 101532924 A CN101532924 A CN 101532924A CN 200910025297 A CN200910025297 A CN 200910025297A CN 200910025297 A CN200910025297 A CN 200910025297A CN 101532924 A CN101532924 A CN 101532924A
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Abstract
The invention relates to a filtering, dehumidifying and sampling probe for fixed pollution source smoke discharge and a working method thereof. The probe comprises a three-way switching valve, a thermostatic heating device, a smoke filter, a back blowing electromagnetic valve and a dehumidifier, wherein the thermostatic heating device is arranged inside the smoke filter, an inlet of the smoke filter is connected with a sample gas inlet outside a shell, an outlet of the smoke filter is connected with a first interface of the three-way switching valve, a second interface of the three-way switching valve is connected with an inlet of the dehumidifier, an outlet of the dehumidifier is connected with a sample gas outlet outside the shell, and a third interface of the three-way switching valve is connected with a back blowing inlet through the back blowing electromagnetic valve; and the smoke filter and the dehumidifier are communicated by the three-way switching valve when the probe is in a normal working state, and the smoke filter and the back blowing inlet are communicated when the probe is in a back blowing state. Most of smoke and moisture are removed during sampling; and the method is suitable for national dry-based environmental protection standard, and overcomes the defects of large analysis error, high cost, difficult technical assurance and high failure rate brought by other methods.
Description
Technical field
Discussion of the present invention be a kind of new method of fixed pollution source smoke discharge continuous detecting.Belong to on-line analysis system and contain SO soluble in water at fixed-contamination source emission flue gas
2The new sampling detection technique field of characteristics.
Background technology
At present, fixed pollution source smoke discharge has three kinds of methods, i.e. heating piping method, dilution method and direct analysis in the world.
Traditional dilution method is with 100 times of sample gas dilutions, thereby reduces absolute liquid water content and dust in the analytical gas, just represents exhaust gas components and concentration but analysis result also need multiply by 100 times, must make the analytical instrument error also enlarge 100 times.And " zero air " assurance that is difficult to be in operation that is used for diluted sample gas contains SO anything but
2, O
2Therefore, compositions such as NO, apparatus expensive but also be difficult to reliably guarantee analysis precision not only.Moreover this method incompatibility China butt environmental protection standard.
Direct analysis adopts luminescence unit and the receiving element that is installed on the flue, detect luminous energy and change the variation that causes because of composition, owing to be difficult to break through light path pollution that complex backgrounds such as flue dust, oily vapour cause, promote in the world by still immature being difficult to of technology for this method.
The most heating piping methods that adopt of China only remove dust when sampling at present, and the gas transmission process is for guaranteeing not cause SO
2Loss, the employing price is high and be difficult to accomplish that the high temperature that performance guarantees heats sampling line.Because it is outdoor that pipeline is installed in, and is subjected to climate effect can occur local line temperature inevitably and do not reach high temperature more than 140 ℃, thereby guided SO
2Analyze distortion, do not remove moisture content during owing to sampling, only before instrument, dewater, then cause and give the processing valve member, sampling pump etc. are subjected to seriously corroded and cause system reliability to reduce, and maintenance work is many, problems such as the continuous online pollution detection time is few, and the environment monitoring data are imperfect.These have exposed the defective on this field detection method.
Summary of the invention
The invention provides a kind of fixed pollution source smoke discharge filtering, dehumidifying sampling probe, have filtrating smoke dust and dehumidification function simultaneously, it goes for the butt environmental protection standard of China and international most countries, it is big to overcome the analytical error that other method brings again, cost height, technology are difficult to guarantee the shortcoming that failure rate is high.In addition, the present invention also provides the method for work of this probe.
The present invention adopts following scheme:
A kind of fixed pollution source smoke discharge filtering, dehumidifying sampling probe, comprise the three-way switch valve, constant temperature heating device, smoke filter, blowback solenoid valve and the dehumidifier that are positioned at housing, described constant temperature heating device is installed in smoke filter inside, the smoke filter inlet connects the outer sample gas import of housing, outlet connects first interface of three-way switch valve, second interface of three-way switch valve connects the dehumidifier inlet, the dehumidifier outlet connects the outer sample gas outlet of housing, and the 3rd interface of three-way switch valve connects the blowback air import by the blowback solenoid valve; Three-way switch valve makes smoke filter be communicated with dehumidifier when the probe normal operating conditions, and smoke filter is communicated with the blowback air import.
Above-mentioned dehumidifier is the semi-conductor dehumidifying device, in the hot-side heat dissipation sheet corresponding position of semiconductor cooler the vortex-induced cooler is installed and carries out gas cooled.In addition, dehumidifier also communicates with standard gas gas piping.
The method of work of said fixing pollution source fume emission filtering, dehumidifying sampling probe may further comprise the steps:
Duty: sample gas at first enters the smoke filter filtering smoke, constant temperature heating device is housed in the smoke filter simultaneously keeps 130 ℃ of constant temperature, make not condensation of gas also be difficult for stopping up, sample gas enters dehumidifier refrigerated dehumidification behind the three-way switch valve from smoke filter outlet afterwards, cryogenic temperature is 9 ℃, discharges from the probe outlet then;
The blowback state: three-way switch valve cuts off sample gas, makes it not enter dehumidifier, and blowback this moment solenoid valve is opened, and carries out reverse gas cleaning, and dehumidifier links to each other with the standard source of the gas simultaneously, carries out system and proofreads its precision of analysis.
Be provided with smoke filter in the filtering, dehumidifying sampling probe of the present invention, smoke filter has constant temperature heating device, makes not condensation of gas in the filtrator, is difficult for stopping up.The smoke filter outlet is connected to solenoid valve and the three-way switch valve that is used to control the blowback source of the gas.During analysis state, sample gas enters semi-conductor dehumidifying device behind the three-way switch valve from filter outlet, and the refrigeration dehumidifying is discharged from the probe outlet at last.During the blowback state, three-way switch valve cuts off sample gas, makes it not to be communicated with dehumidifier, and this moment, back-flushing valve was opened, and carried out reverse gas cleaning.Simultaneously, dehumidifier communicates with standard gas gas piping, can carry out system and proofread its precision of analysis.
For the heat that the semiconductor cooler hot junction is produced effectively sheds, the present invention adopts vortex tube refrigeration mode, with cold air cooling semiconductor cooler hot-side heat dissipation sheet.
Dehumidifying element of the present invention abandons adopting the exhaust fan mode to cool off the refrigerator hot junction, transfers to adopt vortex tube two ultimate attainment cold, thereby has reduced volume, realizes microminiaturized frigorific unit, has improved the probe reliability simultaneously, can bear near the rugged surroundings of flue.
Description of drawings
Fig. 1 is a filtering, dehumidifying sonde configuration schematic diagram,
Fig. 2 is the rear view of Fig. 1;
Fig. 3 is a filtering, dehumidifying method CEMS system flowchart.Among Fig. 3: T-heats dust arrester, the 2YV1-three-way switch valve, and the 2YV2-back-flushing valve, 2YV3-vortex refrigeration valve, CG-750 partly leads, refrigerator, 2Pu1-peristaltic pump, W-vortex refrigerator, L-flowmeter.
Embodiment
Filtering, dehumidifying sampling probe structure of the present invention, as depicted in figs. 1 and 2, comprise the three-way switch valve 1 that is positioned at housing 9, constant temperature heating device 2, smoke filter 3, blowback solenoid valve 4 and dehumidifier 7, described constant temperature heating device 2 is installed in smoke filter 3 inside, smoke filter 3 inlets connect the sample gas import outside the housing 9, outlet connects first interface of three-way switch valve 1, second interface of three-way switch valve 1 connects dehumidifier 7 inlets, dehumidifier 7 outlets connect housing 9 outer sample gas and export, and the 3rd interface of three-way switch valve 1 connects the blowback air imports by blowback solenoid valve 4; Three-way switch valve 1 makes smoke filter 3 be communicated with dehumidifier 7 when the probe normal operating conditions, and smoke filter 3 is communicated with the blowback air import.
The course of work is: sample gas enters smoke filter 3 from sampling probe, in the smoke filter 3 constant temperature heating device is housed, and makes not condensation of gas be difficult for stopping up.Filter outlet is connected to the solenoid valve 4 and the three-way switch valve 1 of blowback source of the gas control, and during analysis state, sample gas enters semi-conductor dehumidifying device refrigerated dehumidification behind the three-way switch valve from filter outlet, discharges from the probe outlet then.During the blowback state, three-way switch valve cuts off sample gas, makes it not to be communicated with dehumidifier, and this moment, back-flushing valve was opened, and carried out reverse gas cleaning, and dehumidifier is imported and exported with standard gas 5,6 and linked to each other simultaneously, can carry out system and proofread its precision of analysis.Other adopts 8 pairs of ZD750 semiconductor refrigeratings of vortex refrigerator dehumidifier, 7 heat radiator secondarys refrigeration, to guarantee its dehumidification rate.
Analytical approach of the present invention is seen shown in Figure 3, the necessary cold well principle of compliance with system of system, be that the gas transmission course can only be at the local cooling de-watering of CG1 and two Dehumidifying elements of CG2, and in other pipeline, valve member and pretreatment component, be to be in heated condition, to guarantee not condensation in transmission, can not cause SO
2Analyze distortion.The filtering, dehumidifying system work process is such: sample gas dehumidifies after filtration and pops one's head in 1,130 ℃ of probe internal filter constant temperature, and sample gas refrigeration temperature is 9 ℃, semiconductor cooler hot junction limit temperature is no more than 26 ℃.Remove dust and most of moisture content, through the hot gas piping of companion, rough constant temperature to 130 ℃ accompanies hot error requirements not high, is higher than 9 ℃ because guarantee companion's heat, and dew point is more than 40 ℃, and promptly to be higher than 50 ℃ be to guarantee very easily to companion's heat.
Sample gas enters instrument cabinet after SO
3Filtrator, heated at constant temperature to 70 ℃～80 ℃ enters second level semi-conductor dehumidifying device through aspiration pump again, refrigeration to 5 ℃, the dehumidifying back forms dry gas and passes through the NOx transducer heat again, converts NOx to NO simultaneously, enters SO
2, the NO analytical instrument.
Standard gas is directly proofreaded instrument, also standard gas can be introduced probe, carries out system's check and correction, and it is undesired to judge whether system has, and can guarantee the accuracy of assay value in system check and correction back.
Claims (5)
1, a kind of fixed pollution source smoke discharge filtering, dehumidifying sampling probe, it is characterized in that: comprise the three-way switch valve (1) that is positioned at housing (9), constant temperature heating device (2), smoke filter (3), blowback solenoid valve (4) and dehumidifier (7), described constant temperature heating device (2) is installed in smoke filter (3) inside, smoke filter (3) inlet connects the outer sample gas import of housing (9), outlet connects first interface of three-way switch valve (1), second interface of three-way switch valve (1) connects dehumidifier (7) inlet, dehumidifier (7) outlet connects the outer sample gas outlet of housing (9), and the 3rd interface of three-way switch valve (1) connects the blowback air import by blowback solenoid valve (4); Three-way switch valve (1) makes smoke filter (3) be communicated with dehumidifier (7) when the probe normal operating conditions, and smoke filter (3) is communicated with the blowback air import.
2, fixed pollution source smoke discharge filtering, dehumidifying sampling probe according to claim 1, it is characterized in that: dehumidifier (7) is the semi-conductor dehumidifying device.
3, fixed pollution source smoke discharge filtering, dehumidifying sampling probe according to claim 1 is characterized in that: in the hot-side heat dissipation sheet corresponding position of semiconductor cooler vortex-induced cooler (8) is installed heat radiator is cooled off.
4, according to claim 1,2 or 3 described fixed pollution source smoke discharge filtering, dehumidifying sampling probes, it is characterized in that: dehumidifier (7) communicates with standard gas gas piping.
5, the method for work of the described fixed pollution source smoke discharge filtering, dehumidifying of a kind of claim 1 sampling probe is characterized in that may further comprise the steps:
Duty: sample gas at first enters smoke filter (3) filtering smoke, constant temperature heating device (2) is housed in the smoke filter (3) simultaneously keeps 130 ℃ of constant temperature, make not condensation of gas also be difficult for stopping up, sample gas enters dehumidifier (7) refrigerated dehumidification behind the three-way switch valve from smoke filter (3) outlet afterwards, cryogenic temperature is 9 ℃, discharges from the probe outlet then;
The blowback state: three-way switch valve cuts off sample gas, makes it not enter dehumidifier (7), and blowback solenoid valve this moment (4) is opened, and carries out reverse gas cleaning, and dehumidifier (7) links to each other with the standard source of the gas simultaneously, carries out system and proofreads its precision of analysis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910025297A CN101532924A (en) | 2009-03-06 | 2009-03-06 | Filtering, dehumidifying and sampling probe for fixed pollution source smoke discharge and working method thereof |
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| CN200910025297A CN101532924A (en) | 2009-03-06 | 2009-03-06 | Filtering, dehumidifying and sampling probe for fixed pollution source smoke discharge and working method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435470A (en) * | 2011-11-25 | 2012-05-02 | 北京雪迪龙科技股份有限公司 | Sampling probe |
| CN104390836A (en) * | 2014-11-24 | 2015-03-04 | 中国科学院沈阳自动化研究所 | Copper smelting smoke analysis and sample injection processing system and method |
| CN105277396A (en) * | 2014-07-10 | 2016-01-27 | 新疆科力新技术发展有限公司 | Portable rapid sampling device for samples of large-tank gas and flue gas in oil field |
| CN106153405A (en) * | 2016-08-29 | 2016-11-23 | 洛阳三隆安装检修有限公司 | A kind of on-line gas analysis instrument forward type sampling probe |
| CN106248445A (en) * | 2016-08-30 | 2016-12-21 | 中煤科工集团重庆研究院有限公司 | Extraction method high-temperature flue gas discharge on-line analysis system in situ |
| CN107631916A (en) * | 2017-09-12 | 2018-01-26 | 南京友智科技有限公司 | A kind of more dot matrix high-temperature sampling probes of gaseous contaminant |
| CN108593367A (en) * | 2018-04-28 | 2018-09-28 | 南京新瓦特智控科技有限公司 | A kind of flue gas multicomponent multidraw measuring system and method |
| CN109239274A (en) * | 2018-09-27 | 2019-01-18 | 彭力 | A kind of gas sample injection device measuring stationary source total organic carbon |
| CN110261540A (en) * | 2019-04-01 | 2019-09-20 | 南京安荣信电子科技有限公司 | Gaseous pollutant sampling probe and its application method with motoring condition switching valve |
| CN113804511A (en) * | 2020-05-29 | 2021-12-17 | 同方威视技术股份有限公司 | Handheld gas sampling device and gas detection system |
-
2009
- 2009-03-06 CN CN200910025297A patent/CN101532924A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435470A (en) * | 2011-11-25 | 2012-05-02 | 北京雪迪龙科技股份有限公司 | Sampling probe |
| CN105277396A (en) * | 2014-07-10 | 2016-01-27 | 新疆科力新技术发展有限公司 | Portable rapid sampling device for samples of large-tank gas and flue gas in oil field |
| CN104390836A (en) * | 2014-11-24 | 2015-03-04 | 中国科学院沈阳自动化研究所 | Copper smelting smoke analysis and sample injection processing system and method |
| CN106153405A (en) * | 2016-08-29 | 2016-11-23 | 洛阳三隆安装检修有限公司 | A kind of on-line gas analysis instrument forward type sampling probe |
| CN106248445A (en) * | 2016-08-30 | 2016-12-21 | 中煤科工集团重庆研究院有限公司 | Extraction method high-temperature flue gas discharge on-line analysis system in situ |
| CN106248445B (en) * | 2016-08-30 | 2019-07-26 | 中煤科工集团重庆研究院有限公司 | Extraction method high-temperature flue gas in situ discharges on-line analysis system |
| CN107631916A (en) * | 2017-09-12 | 2018-01-26 | 南京友智科技有限公司 | A kind of more dot matrix high-temperature sampling probes of gaseous contaminant |
| CN108593367A (en) * | 2018-04-28 | 2018-09-28 | 南京新瓦特智控科技有限公司 | A kind of flue gas multicomponent multidraw measuring system and method |
| CN109239274A (en) * | 2018-09-27 | 2019-01-18 | 彭力 | A kind of gas sample injection device measuring stationary source total organic carbon |
| CN110261540A (en) * | 2019-04-01 | 2019-09-20 | 南京安荣信电子科技有限公司 | Gaseous pollutant sampling probe and its application method with motoring condition switching valve |
| CN113804511A (en) * | 2020-05-29 | 2021-12-17 | 同方威视技术股份有限公司 | Handheld gas sampling device and gas detection system |
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Open date: 20090916 |