CN202166609U - Ultraviolet difference smoke density monitoring system using hot wet extraction method - Google Patents
Ultraviolet difference smoke density monitoring system using hot wet extraction method Download PDFInfo
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- CN202166609U CN202166609U CN2011201856232U CN201120185623U CN202166609U CN 202166609 U CN202166609 U CN 202166609U CN 2011201856232 U CN2011201856232 U CN 2011201856232U CN 201120185623 U CN201120185623 U CN 201120185623U CN 202166609 U CN202166609 U CN 202166609U
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Abstract
An ultraviolet difference smoke density monitoring system using a hot wet extraction method belongs to smoke monitoring devices. A probe is directly inserted in a smoke channel to be connected with a heater in a heat tracing box, a filter and a measuring tank, and measuring light paths and spectrum are not affected by temperature, smoke dust, humidity and the like in the smoke channel. Complete filtering of dust and other solid impurities can be ensured. The heat tracing box well controls that the temperature of extracted gas and the temperature of the gas in the smoke channel are consistent and ensures the size of absorption sections is consistent. The system is provided with a calibration device to achieve online zero and full calibration. A measuring area cannot deform caused by the temperature of the smoke channel, and the spectrum is simple to adjust. Ultraviolet difference removes disturbance of moisture in the smoke to achieve conversion between standard state and drying state. The system has low requirements for onsite environments and is suitable for more sites.
Description
Technical field
The utility model belongs to a kind of flue gas on-Line Monitor Device, particularly a kind of heat extraction method ultraviolet difference flue gas concentration monitor system that wets.
Background technology
The harmful gas of fixed-contamination source emission is mainly by sulphuric dioxide SO
2And oxides of nitrogen (NOx) formation, they are to cause the main dusty gas of air-polluting, country progressively increases for the input and the attention degree of flue gas monitoring.At present, the monitoring method that fume continuous monitoring system is taked mainly contains three kinds: the one, and the dilution extraction method, this method outside flue, is diluted fume extraction simultaneously, thereby is utilized dilution to measure to extracting gas, and advantage is that precision is good.The 2nd, direct extraction method, this method equally with fume extraction outside flue, but do not dilute extracting gas, extract the pneumatolytic branch but utilize various analytical instrument directly to analyze.These two kinds all are based on extraction method and measure.The third is a direct insertion method, and it is that probe is directly inserted in the flue, and the extracting gases sensor does not directly contact with the interior flue gas of flue, measures.See from the detection principle of sulphuric dioxide and oxides of nitrogen, preceding two kinds based on removable method, often adopt electrochemical method to measure, then a kind of card edge type often adopts the ultraviolet difference absorption spectroscopy to measure.These three kinds of methods respectively have relative merits (seeing table 1):
Three kinds of monitoring method contrasts of table 1
There is following several problem simultaneously in direct insertion method:
One, technical elements
1, directly insert difficult realization of on-line calibration of metering system, be the technical barrier of this industry always.
2, it is high temperature resistant to solve probe, and scene temperature is high, surpasses 200 ℃, and instrument in use following problem can occur:
A, probe distortion because the flue-gas temperature height adds sonde configuration and installation question, can cause the probe distortion, and this moment, spectrum descended seriously, on-the-spot spectrum debug difficulties, and head it off needs to improve sonde configuration;
B, gather PTFE and melt, temperature is too high, can cause and gather tetrafluoro deliquescing, distortion, causes light path to stop up, and head it off, needs more conversion materials.
3, the probe gas consumption is big, and source of the gas is unclean, causes probe to pollute
Existing probe uses pressurized air, and gas consumption is bigger, and the scene provides the problem of clean gas source little, if on-the-spot no source of the gas provides the source of the gas maintenance issues big, the scene has source of the gas can not guarantee the cleaning of source of the gas, makes the maintenance of instrument very big.
When 4, steam was big, light signal was seriously decayed.
5, during the water-vapo(u)r saturation state, water exists with two kinds of forms of gaseous state with liquid, and there is certain error in the moisture measurement meeting, and the hygronom of on-line measurement at present can't address this problem, and the moisture that can only measure gaseous form how much.
Two, rig-site utilization aspect
1, the on-the-spot more complicated of installing, large-scale monitoring platform and Control Room need be built in the scene.
2, based on the restriction of spectrometer signal wire length, probe and mainframe need be placed on the same monitoring platform, and very inconvenient client checks data, parameter and maintenance are set.
3, under the wet desulphurization situation, eyeglass is prone to pollute.
4, site environment is abominable, and vibrations are big, the pollution of dirt and sulfide, and when equipment was placed on the scene, can shorten greatly serviceable life, and deuterium lamp, paraboloidal mirror, optical fiber, electron device life-span seriously shorten.
5, analytic system (DAS) operation stability is poor.
6, during frequent maintenance, can't guarantee 45 minutes valid data of one hour.
Three, maintenance aspect
1, under high humidity, the high dirt situation, steam is big, and spectrum descends fast, and maintenance is big, causes measuring accuracy to descend.
2,, when installing, eminence bothers relatively during maintenance, repair because of mainframe can't separate with probe.
Generally speaking, the influence of the interference component in the flue is avoided in the measurement of extraction method easily, thereby obtains higher measuring accuracy; The advantage of direct insertion method is relatively simple for structure, is easy to realize.
The utility model content
The purpose of the utility model is to the defective of existing card edge type fume continuous monitoring system; Mainly contain interference component, gas temperature, gas pressure in the tested gas based on environment for the influence of difference ultraviolet absorption spectroscopy; Design the wet extraction method fume continuous monitoring system of a kind of heat based on difference ultraviolet absorption spectroscopy measuring principle, its filtration system has guaranteed the abundant filtration of dust and other solid impurities; It is consistent with the temperature of gas in flue to accompany hot case can control the temperature of extracting gases well, has guaranteed that the size of absorption cross-section is consistent.
The purpose of the utility model realizes through following technical scheme: a kind of heat extraction method ultraviolet difference flue gas concentration monitor system that wets, and it is characterized in that: it comprises probe, measuring cell, caliberating device and dust-collecting bucket;
The front end of probe is shaped on the hot flange of the companion who is connected with flue; The rear end of probe is provided with air intake opening and gas outlet; Air intake opening is connected purification of compressed air through pipeline with valve; The gas outlet is connected electric tracing pipe and pressurized air pilot piping respectively through pipeline and valve, and the pressurized air pilot piping connects purification of compressed air;
Accompany in the hot case and install and measure the pond, deuterium lamp is installed in the front end of measuring cell, and spectrometer is connected through optical fiber with the measuring cell rear end; Measuring cell is cylindric, and the lining of inner installation and its uniform internal diameter, the front end of measuring cell are installed flat mirror; Convex lens are installed in the rear end, are provided with input pipe and efferent duct at the back and on the sidewall of the measuring cell of the front of convex lens at flat mirror, and the input pipe of measuring cell connects filtrator and well heater successively through pipeline; Well heater connects the electric tracing pipe through pipeline, is connected with the probe gas outlet, and well heater is through pipeline parallel connection caliberating device; Caliberating device comprises demarcation pipeline and the purification of compressed air pipeline that is connected in parallel, and on the demarcation pipeline flow is installed and is taken into account valve, connects calibrating gas; Purification of compressed air pipeline mounted valve connects purification of compressed air; The efferent duct of measuring cell connects oxygen level sensor, pressure transducer and the Temperature Humidity Sensor that parallel connection is provided with through pipeline; Oxygen level sensor connect successively installation gravity condenser that parallel connection is provided with and peristaltic pump discharge pipe line, be provided with the exhaust pipe of diaphragm pump and be provided with the gas exhaust piping of valve, be connected with dust-collecting bucket respectively.
The heating box temperature alarm is installed in the hot case of said companion.
Temperature controller is installed in the hot case of said companion.
The advantage and the beneficial effect of the utility model are:
1, can realize online zero, the full calibration of system;
2, adopt the measurement of bleeding, measuring cell is measured light path and spectrum and not influenced by the interior temperature of flue, flue dust, humidity etc. not in flue;
3, the compressed gas consumption significantly reduces, and the source of the gas cleanliness factor is required to reduce;
4, measured zone can be because of flue temperature be out of shape, and the spectrum adjustment is simple than card edge type;
5, on-the-spot platform building is required to reduce, site environment is required to reduce, more on-the-spotly can adapt to;
6, adopt hot wet method, the humidity on-line measurement does not exist the cold dried component that causes of cryochem to lose problem, and ultraviolet difference can be got rid of the interference of moisture in the flue gas, can realize marking simultaneously doing and change.
7, for the wet extraction method of heat, filtering system has guaranteed the abundant filtration of dust and other solid impurities.
8, owing to designed the hot case of companion, the temperature that can control extracting gases well is consistent with the temperature of gas in flue, has guaranteed that the size of absorption cross section is consistent.
Description of drawings
Fig. 1 is the utility model structural representation.
Wherein: 1-accompanies hot case, the 2-measuring cell, and the 3-deuterium lamp, the 4-spectrometer, 5-optical fiber, the 6-lining, 7-puts down mirror; The 8-convex lens, the 9-pipeline, the 10-filtrator, the 11-well heater, 12-electric tracing pipe, the 13-probe, 14-accompanies hot flange; The 15-pneumatic valve, 16-solenoid valve, 17-flowmeter, 18-oxygen level sensor, 19-pressure transducer, 20-Temperature Humidity Sensor; 21-gravity condenser, 22-peristaltic pump, 23-diaphragm pump, 24-dust-collecting bucket, 25-heating box temperature alarm, 26-temperature controller.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Embodiment: as shown in Figure 1, a kind of heat extraction method ultraviolet difference flue gas concentration monitor system that wets accompanies in the hot case 1 and installs and measures pond 2; Deuterium lamp 3 is installed in the front end of measuring cell 2, and spectrometer 4 is connected with measuring cell 2 rear end optical fiber 5, and measuring cell 2 is cylindric; The lining 6 of uniform internal diameter is installed in the measuring cell 2, and the front end of measuring cell 2 is installed flat mirror 7, and convex lens 8 are installed in the rear end; On the sidewall of the measuring cell 2 of the front of the back of flat mirror 7 and convex lens 8, be provided with input pipe and efferent duct, the input pipe of measuring cell 2 connects filtrators 10 through pipeline 9, and filtrator 10 passes through pipeline 9 and is connected with well heater 11; The gas access that well heater 11 is provided with on the hot case 1 of companion connects electric tracing pipe 12, and the front end of probe 13 is installed the hot flange 14 of companion, inserts in the flue; The rear end of probe 13 is provided with air intake opening and gas outlet; The gas outlet connects pneumatic valve 15 interface A, and electric tracing pipe 12 connects pneumatic valve 15 interface B, and pneumatic valve 15 interface C connect purification of compressed air through pipeline 9, solenoid valve DCF216; Probe 13 terminal air intake openings connect purification of compressed air through pipeline 9, solenoid valve DCF1 16; The pipeline 9 that parallel connection is connected with calibrating gas on the pipeline 9 between well heater 11 and the gas access, this pipeline 9 is provided with two-way electromagnetic valve DCF816 and flowmeter 17, and connection calibrating gas SO
2With NOx and N; The pipeline 9 that parallel connection is connected with purification of compressed air on the pipeline 9 that connects calibrating gas; Two-way electromagnetic valve DCF6 16 is installed on this pipeline 9; The efferent duct of measuring cell 2 connects oxygen level sensor 18, pressure transducer 19 and the Temperature Humidity Sensor 20 that parallel connection is provided with through pipeline 9; Oxygen level sensor 18 connect successively installation gravity condenser 21 that parallel connection is provided with and peristaltic pump 22 discharge pipe line 9, be provided with the exhaust pipe 9 of diaphragm pump 23 and be provided with the gas exhaust piping 9 of two-way electromagnetic valve DCF7 16, be connected with dust-collecting bucket 24 respectively; Accompany in the hot case 1 heating box temperature alarm 25 and temperature controller 26 are installed.
Principle of work:
Hot wet method is divided into measurement state, align mode, probe blowback state and measuring cell blowback state when working; The effect of diaphragm pump provides the power of bleeding, and the effect of peristaltic pump is to be discharged to the condensate water of gravity condenser in the dust-collecting bucket;
(1) measurement state:
Turn-off solenoid valve DCF1, DCF2, DCF6, DCF7 and DCF8, connect diaphragm pump, begin to bleed; Flue gas gets into from probe, and the electric tracing pipe of flowing through gets into the hot case of companion; Companion's heater temperature is controlled by temperature controller, and gas flows through well heater in the hot case of companion, and well heater makes the temperature constant of the hot case of companion on the flue actual temperature; The gas that extracts is removed impurity such as dust via filtrator, fume extraction is sent ultraviolet-visible light by the ultraviolet source deuterium lamp in the measuring cell of the hot case of companion; This light beam incides the flat mirror of measuring cell, and the light beam planoconvex lens of after smoke absorption, decaying converges at optical fiber and imports spectrometer into, carries out SO according to ultraviolet difference absorption spectrum ratio juris
2, NO, N
2Ultraviolet spectroscopy measure; Simultaneously measure temperature, humidity, oxygen amount and pressure and other parameters by corresponding pressure, Temperature Humidity Sensor and oxygen level sensor; Final tail gas by the measuring cell efferent duct by pipeline after the gravity condenser condenses; Condensate water is discharged into the dust-collecting bucket from peristaltic pump, and the gas part is discharged from diaphragm pump.
(2) align mode
Close diaphragm pump earlier, again according to the requirement of demarcating, corresponding calibrating gas SO
2, NO, N
2Receive on the pipeline, turn-off solenoid valve DCF1 and DCF6, connect solenoid valve DCF2, DCF7 and DCF8; At this moment, the gas circuit at flue gas probe place is disconnected, and gas can't circulate; Gas gets into flowmeter, gets into the hot case of companion through solenoid valve DCF8, and companion's heater temperature is controlled by temperature controller; Gas flows through well heater in the hot case of companion, well heater makes the temperature constant of the hot case of companion on the flue actual temperature, and the gas of extraction is removed impurity such as dust via filtrator; Fume extraction is sent ultraviolet-visible light by the ultraviolet source deuterium lamp in the measuring cell of the hot case of companion, this light beam incides the flat mirror of measuring cell; The light beam planoconvex lens of after smoke absorption, decaying converges at optical fiber and imports spectrometer into, carries out SO according to ultraviolet difference absorption spectrum ratio juris
2, NO, N
2Ultraviolet spectroscopy measure, measure temperature, humidity, oxygen amount and pressure and other parameters by corresponding pressure, Temperature Humidity Sensor and oxygen level sensor simultaneously, then, DCF7 is discharged in the dust-collecting bucket through solenoid valve.
(3) probe blowback state
Close diaphragm pump, turn-off solenoid valve DCF6, DCF7, DCF8, connect solenoid valve DCF1, DCF2, wherein DCF2 keeps connecting always, and DCF1 connected one second, turn-offed 5 seconds, so repeatedly.
(4) measuring cell blowback state:
Close diaphragm pump, turn-off solenoid valve DCF1, DCF8, connect solenoid valve DCF2, DCF6, DCF7; At this moment; The gas circuit at flue gas probe place is disconnected, and gas can't circulate, and purification of compressed air gets into the hot case of companion through solenoid valve DCF6; In the hot case of companion, flow through well heater, filtrator, measuring cell, pressure transducer, Temperature Humidity Sensor and oxygen level sensor, DCF7 is discharged in the dust-collecting bucket through solenoid valve.
Claims (3)
1. the wet extraction method ultraviolet difference flue gas concentration monitor system of a heat, it is characterized in that: it comprises probe, measuring cell, caliberating device and dust-collecting bucket;
The front end of probe is shaped on the hot flange of the companion who is connected with flue; The rear end of probe is provided with air intake opening and gas outlet; Air intake opening is connected purification of compressed air through pipeline with valve; The gas outlet is connected electric tracing pipe and pressurized air pilot piping respectively through pipeline and valve, and the pressurized air pilot piping connects purification of compressed air;
Accompany in the hot case and install and measure the pond, deuterium lamp is installed in the front end of measuring cell, and spectrometer is connected through optical fiber with the measuring cell rear end; Measuring cell is cylindric, and the lining of inner installation and its uniform internal diameter, the front end of measuring cell are installed flat mirror; Convex lens are installed in the rear end, are provided with input pipe and efferent duct at the back and on the sidewall of the measuring cell of the front of convex lens at flat mirror, and the input pipe of measuring cell connects filtrator and well heater successively through pipeline; Well heater connects the electric tracing pipe through pipeline, is connected with the probe gas outlet, and well heater is through pipeline parallel connection caliberating device; Caliberating device comprises demarcation pipeline and the purification of compressed air pipeline that is connected in parallel, and on the demarcation pipeline flow is installed and is taken into account valve, connects calibrating gas; Purification of compressed air pipeline mounted valve connects purification of compressed air; The efferent duct of measuring cell connects oxygen level sensor, pressure transducer and the Temperature Humidity Sensor that parallel connection is provided with through pipeline; Oxygen level sensor connect successively installation gravity condenser that parallel connection is provided with and peristaltic pump discharge pipe line, be provided with the exhaust pipe of diaphragm pump and be provided with the gas exhaust piping of valve, be connected with dust-collecting bucket respectively.
2. a kind of heat as claimed in claim 1 extraction method ultraviolet difference flue gas concentration monitor system that wets is characterized in that: the heating box temperature alarm is installed in the hot case of said companion.
3. a kind of heat as claimed in claim 1 extraction method ultraviolet difference flue gas concentration monitor system that wets is characterized in that: temperature controller is installed in the hot case of said companion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201856232U CN202166609U (en) | 2011-06-03 | 2011-06-03 | Ultraviolet difference smoke density monitoring system using hot wet extraction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201856232U CN202166609U (en) | 2011-06-03 | 2011-06-03 | Ultraviolet difference smoke density monitoring system using hot wet extraction method |
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| CN202166609U true CN202166609U (en) | 2012-03-14 |
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| CN2011201856232U Expired - Fee Related CN202166609U (en) | 2011-06-03 | 2011-06-03 | Ultraviolet difference smoke density monitoring system using hot wet extraction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018164A (en) * | 2012-12-06 | 2013-04-03 | 深圳市南油诺安电子有限公司 | Automatic cleaning and zero setting system for light ion organic volatile gas detector |
| CN104407161A (en) * | 2014-11-24 | 2015-03-11 | 汇众翔环保科技河北有限公司 | Smoke gas on-line monitoring system and smoke gas on-line monitoring method |
| CN105806770A (en) * | 2016-04-29 | 2016-07-27 | 河南省日立信股份有限公司 | Instrument testing device capable of generating high temperature and high humidity |
-
2011
- 2011-06-03 CN CN2011201856232U patent/CN202166609U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018164A (en) * | 2012-12-06 | 2013-04-03 | 深圳市南油诺安电子有限公司 | Automatic cleaning and zero setting system for light ion organic volatile gas detector |
| CN104407161A (en) * | 2014-11-24 | 2015-03-11 | 汇众翔环保科技河北有限公司 | Smoke gas on-line monitoring system and smoke gas on-line monitoring method |
| CN104407161B (en) * | 2014-11-24 | 2016-01-13 | 汇众翔环保科技河北有限公司 | Smoke on-line monitoring system and monitoring method |
| CN105806770A (en) * | 2016-04-29 | 2016-07-27 | 河南省日立信股份有限公司 | Instrument testing device capable of generating high temperature and high humidity |
| CN105806770B (en) * | 2016-04-29 | 2018-07-24 | 河南省日立信股份有限公司 | A kind of instrument experimental rig that high temperature and humidity occurs |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20120603 |