CN103940550A - Device for measuring air leakage of power station boiler air pre-heater - Google Patents
Device for measuring air leakage of power station boiler air pre-heater Download PDFInfo
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- CN103940550A CN103940550A CN201410140235.0A CN201410140235A CN103940550A CN 103940550 A CN103940550 A CN 103940550A CN 201410140235 A CN201410140235 A CN 201410140235A CN 103940550 A CN103940550 A CN 103940550A
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Abstract
The invention discloses a device for measuring air leakage of a power station boiler air pre-heater. The device comprises at least one gas sampling gun, two gas mixers, a gas sampling switchover tee joint communicated with the gas mixers, a sucking pump communicated with the switchover tee joint and an oxymeter connected with the sucking pump, the gas sampling guns are arranged at an inlet flue and an outlet flue of the boiler air pre-heater respectively, and the two gas mixers are communicated with the gas sampling gun at the inlet flue and the gas sampling gun at the outlet flue respectively. The gas sampling guns are arranged, multi-point simultaneous sampling on the flues is achieved, the measurement result is more accurate, and the device can meet testing regulation requirements. Control sampling on different gas inlet pipes can be achieved through the gas mixers, the air leakage problem of the mixers can be effectively and completely eradicated through sealing liquid, and measurement reliability is improved. The oxymeter is adopt to measure inlet and outlet gas components, measurement errors caused by instrument precision are eliminated, and measurement precision is improved.
Description
Technical field
The present invention relates to the device that a kind of coal-fired boiler air preheater is measured, in particular, relate to a kind of apparatus and method that meet the carried out multiple spot gas collecting of standard-required and the measurement of the coal-fired boiler air preheater of measurement.
Background technology
Air preheater is as the heat-exchange apparatus in Rear of Utility Boiler flue, and its effect is, is the heat in recovered flue gas on the one hand, reduces exhaust gas temperature, improves boiler thermal output; Because air is preheated, improve the initial temperature of fuel and air on the other hand, strengthened catching fire and combustion process of fuel, reduced non-complete combustion of fuel loss.Boiler air preheater leaks out affects the performance driving economy of unit, and the shape body that leaks out of measuring air preheater is very important.Because the cross section of the import and export flue of air preheater is larger, smoke components is inhomogeneous, and generally air-heater leakage test Adoption Network method is measured the smoke components of each measuring point.Point-to-point measurement smoke components, the large and length consuming time of workload can not guarantee to measure simultaneously, and measuring accuracy is difficult to guarantee.In addition, because air preheater is imported and exported measuring point apart from longer, generally air preheater import and export smoke components adopts two oxygen flowmeter measurements, and the precision of surveying instrument is larger on the impact of air leak rate of air curtain result.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of boiler air preheater easy to operate, that measurement result can be carried out multiple spot gas collecting and composition measurement accurately and reliably measurement mechanism that leaks out.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the device that a kind of station boiler air-heater leakage is measured, its gordian technique is: it comprises at least one the gas sampling gun that is arranged at respectively boiler air preheater inlet flue duct and exhaust pass place, two gas mixers that are communicated with respectively with the gas sampling gun at inlet flue duct place and the gas sampling gun at exhaust pass place, the gas sampling switching three-way being communicated with gas mixer, the aspiration pump being communicated with switching three-way and the oxygen amount meter being connected with aspiration pump.
Preferably, described gas sampling gun comprises sampling pipe, circular base, sleeve pipe and the fixed pin that length does not wait, and described sleeve pipe is positioned on circular base, and described sampling pipe is positioned on sleeve pipe by fixed pin.
Preferably, described gas mixer comprises the hydrostatic column that a material transparent material and that be not subject to sample gas corrosion is made, and is provided with identical draft tube and the gas fairlead of at least two structures being communicated with it in described hydrostatic column;
Described hydrostatic column is provided with gland bonnet, and the height of described gland bonnet, lower than the bucket wall of hydrostatic column, is provided with sealing liquid above described gland bonnet, and the bottom of hydrostatic column is provided with filtered fluid;
The air intake opening of described draft tube is positioned at outside hydrostatic column, and its other end is positioned at filtered fluid below through its gas outlet after gland bonnet, and described draft tube is provided with flow control valve and flowmeter;
Described gas fairlead is arranged on gland bonnet, and its one end, gas outlet extends in air after passing gland bonnet and sealing liquid;
The bottom of described cylindrical container is provided with filtrate exhaust valve.
The beneficial effect that adopts technique scheme to produce is: the present invention arranges a plurality of gas sampling guns, realizes the multiple spot of flue is sampled simultaneously, and measurement result is more accurate, makes its Pass Test rules requirement; Gas mixer of the present invention can be realized the control sampling to various inlet pipe, and sealing liquid can effectively be stopped mixer Air Leakage, improves the reliability of measuring; The present invention adopts the import of an oxygen flowmeter measurement and exit gas composition, has eliminated the measuring error that accuracy of instrument causes, and has improved the precision of measuring.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of gas sampling gun of the present invention;
Fig. 3 is the structural representation of gas mixer of the present invention;
Wherein, 1, gas sampling gun, 2, gas mixer, 3, valve, 4, switching three-way, 5, aspiration pump, 6, oxygen amount meter (being also oxygen analyzer, by combustion measurement composition), 7, circular base, 8, fixed pin, 9, sleeve pipe, 10, sampling pipe, 12, draft tube, 13, flow control valve, 14, flowmeter, 15, gas fairlead, 16, mixer peripheric surface, 17, gland bonnet, 18, filtered fluid, 19, sealing liquid, 20, air preheater.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to accompanying drawing 1, the present embodiment comprises that at least one the gas sampling gun that is arranged at boiler air preheater inlet flue duct place and at least one the gas sampling gun 1 that is arranged at exhaust pass place, the gas sampling gun of two gas mixer 2(1 being communicated with respectively with the gas sampling gun 1 at inlet flue duct place and the gas sampling gun 1 at exhaust pass place are communicated with a gas mixer 2), the gas sampling switching three-way 4 that is communicated with gas mixer 2, with the aspiration pump 5 of switching three-way 4 connections and the oxygen amount meter 6 being connected with aspiration pump 5.
Referring to accompanying drawing 2, described gas sampling gun 1 comprises sampling pipe 10, circular base 7, sleeve pipe 9 and the fixed pin 8 that length does not wait, and described sleeve pipe 9 is positioned on circular base 7, and described sampling pipe 10 is positioned on sleeve pipe 9 by fixed pin 8.Sampling pipe 10 inserts in the sleeve pipe 9 on circular base 7 according to the length requirement of site test, and fixing with fixed pin 8.Many above-mentioned gas sampling guns are set on the same cross section of inlet flue duct and exhaust pass, realize network technique multi-point sampling, guarantee the accuracy of sample gas.
Referring to accompanying drawing 3, described gas mixer 2 comprises the hydrostatic column 16 that a material transparent material and that be not subject to sample gas corrosion is made, and is provided with identical draft tube 12 and the gas fairlead 15 of at least two structures being communicated with it in described hydrostatic column 16; Described hydrostatic column 16 is provided with gland bonnet 17, and the height of described gland bonnet 17, lower than the bucket wall of hydrostatic column 16, is provided with sealing liquid 19 above described gland bonnet 17, and the bottom of hydrostatic column 16 is provided with filtered fluid 18;
The air intake opening of described draft tube 12 is positioned at outside hydrostatic column 16, and its other end is positioned at filtered fluid 18 belows through rear its gas outlet of gland bonnet 17, and described draft tube 12 is provided with flow control valve 13 and flowmeter 14;
Described gas fairlead 15 is arranged on gland bonnet 17, and its one end, gas outlet extends in air after passing gland bonnet 17 and sealing liquid 17; The bottom of described cylindrical container 16 is provided with filtrate exhaust valve.Filtered fluid 18 in cylindrical container 16 can adopt saturated brine.The outlet of draft tube 12 is stretched into below the liquid level of filtered fluid 18, and the air intake opening of gas fairlead 15 is positioned at the top of filtered fluid 18 liquid levels.In draft tube 12, be provided with flowmeter 14 and flow control valve 13, realize the adjusting of flow indication and uninterrupted.The upper surface of sealing lid 17 is lower than the surrounding wall of cylindrical container 16, and gland bonnet 17 injects sealing liquid 19 above, prevents that the inwall junction of draft tube 12 and gas fairlead 15 and cylindrical container 16 through parts and gland bonnet and cylindrical container 16 from revealing.
When testing, gas sampling gun is placed into respectively in the gaging hole on air preheater 20 inlet flue ducts and exhaust pass, the output terminal of gas sampling gun is connected with the draft tube 12 of gas mixer 2, the gas fairlead 15 of the gas mixer 2 of inlet flue duct and exhaust pass is connected with two entrances of switching three-way 4 respectively, switching three-way 4(T-valve) outlet is connected with the input end of oxygen amount meter 6 after aspiration pump 5, realize the measurement of smoke components, and then calculate air leak rate of air curtain.
Switching three-way 4 of the present invention and aspiration pump 5 can be realized with an oxygen amount meter 6 and alternately measure air preheater import and exit gas composition, the measuring error that the precision of elimination oxygen amount meter causes.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. the device that station boiler air-heater leakage is measured, is characterized in that: it comprises at least one the gas sampling gun (1) that is arranged at respectively boiler air preheater inlet flue duct and exhaust pass place, two gas mixers (2) that are communicated with respectively with the gas sampling gun (1) at inlet flue duct place and the gas sampling gun at exhaust pass place, the gas sampling switching three-way (4) being communicated with gas mixer (2), the aspiration pump (5) being communicated with switching three-way (4) and the oxygen amount meter (6) being connected with aspiration pump (5).
2. the device that station boiler air-heater leakage according to claim 1 is measured, it is characterized in that: described gas sampling gun (1) comprises sampling pipe 10, circular base (7), sleeve pipe (9) and the fixed pin (8) that length does not wait, it is upper that described sleeve pipe (9) is positioned circular base (7), and described sampling pipe (10) is positioned on sleeve pipe (9) by fixed pin (8).
3. the device that station boiler air-heater leakage according to claim 1 is measured, it is characterized in that: described gas mixer (2) comprises the hydrostatic column (16) that a material transparent material and that be not subject to sample gas corrosion is made, and is provided with identical draft tube (12) and the gas fairlead (15) of at least two structures being communicated with it in described hydrostatic column (16);
Described hydrostatic column (16) is provided with gland bonnet (17), the height of described gland bonnet (17) is lower than the bucket wall of hydrostatic column (16), in described gland bonnet (17) top, be provided with sealing liquid (19), the bottom of hydrostatic column (16) is provided with filtered fluid (18);
The air intake opening of described draft tube (12) is positioned at outside hydrostatic column (16), and its other end is positioned at filtered fluid (18) below through its gas outlet after gland bonnet (17), and described draft tube (12) is provided with flow control valve (13) and flowmeter (14);
It is upper that described gas fairlead (15) is arranged in gland bonnet (17), and its one end, gas outlet extends in air after passing gland bonnet (17) and sealing liquid (17);
The bottom of described cylindrical container (16) is provided with filtrate exhaust valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140235.0A CN103940550A (en) | 2014-04-09 | 2014-04-09 | Device for measuring air leakage of power station boiler air pre-heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140235.0A CN103940550A (en) | 2014-04-09 | 2014-04-09 | Device for measuring air leakage of power station boiler air pre-heater |
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| CN103940550A true CN103940550A (en) | 2014-07-23 |
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| CN201410140235.0A Pending CN103940550A (en) | 2014-04-09 | 2014-04-09 | Device for measuring air leakage of power station boiler air pre-heater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021357A (en) * | 2015-06-24 | 2015-11-04 | 华北电力科学研究院有限责任公司 | Air preheater air leakage rate determination method and device |
| CN105043689A (en) * | 2015-06-24 | 2015-11-11 | 华北电力科学研究院有限责任公司 | Method and device for determining air leakage rate of air pre-heater |
| CN105388258A (en) * | 2015-12-21 | 2016-03-09 | 中国神华能源股份有限公司 | Gas pipeline wind leakage apparatus and oxygen-rich combustion system |
| CN106124259A (en) * | 2016-06-15 | 2016-11-16 | 安徽省绿巨人环境技术有限公司 | A kind of device testing air quality |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105021357A (en) * | 2015-06-24 | 2015-11-04 | 华北电力科学研究院有限责任公司 | Air preheater air leakage rate determination method and device |
| CN105043689A (en) * | 2015-06-24 | 2015-11-11 | 华北电力科学研究院有限责任公司 | Method and device for determining air leakage rate of air pre-heater |
| CN105043689B (en) * | 2015-06-24 | 2017-05-10 | 华北电力科学研究院有限责任公司 | Method and device for determining air leakage rate of air pre-heater |
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| CN105388258A (en) * | 2015-12-21 | 2016-03-09 | 中国神华能源股份有限公司 | Gas pipeline wind leakage apparatus and oxygen-rich combustion system |
| CN106124259A (en) * | 2016-06-15 | 2016-11-16 | 安徽省绿巨人环境技术有限公司 | A kind of device testing air quality |
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Application publication date: 20140723 |
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