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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
gas
communicated
sampling
air
gland bonnet
Prior art date
Application number
CN201410140235.0A
Other languages
Chinese (zh)
Inventor
张勇胜
闫慧博
张万德
贾永会
刘文献
Original Assignee
国家电网公司
国网河北省电力公司电力科学研究院
河北省电力建设调整试验所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 国家电网公司, 国网河北省电力公司电力科学研究院, 河北省电力建设调整试验所 filed Critical 国家电网公司
Priority to CN201410140235.0A priority Critical patent/CN103940550A/en
Publication of CN103940550A publication Critical patent/CN103940550A/en

Links

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

The device that a kind of station boiler air-heater leakage is measured
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.
CN201410140235.0A 2014-04-09 2014-04-09 Device for measuring air leakage of power station boiler air pre-heater CN103940550A (en)

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

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
CN103940550A true CN103940550A (en) 2014-07-23

Family

ID=51188314

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410140235.0A CN103940550A (en) 2014-04-09 2014-04-09 Device for measuring air leakage of power station boiler air pre-heater

Country Status (1)

Country Link
CN (1) CN103940550A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2575672Y (en) * 2002-09-26 2003-09-24 马克文 Inverted antisand wind speed sensor
JP3512556B2 (en) * 1996-03-22 2004-03-29 日本碍子株式会社 Dust concentration measurement device
CN101556220A (en) * 2009-05-26 2009-10-14 郑州市光力科技发展有限公司 Air pumping, sampling and detecting device and quick pumping and sampling system and method
CN202089386U (en) * 2011-05-24 2011-12-28 山东新康恒工贸有限公司 Liquid seal emulsion barrel
CN202141562U (en) * 2011-07-26 2012-02-08 山东电力研究院 Coal-fired boiler air preheater air leakage on-line monitoring device
CN102671418A (en) * 2012-05-31 2012-09-19 江西稀有金属钨业控股集团有限公司 Extraction tank with tank cover sealing device
CN202844630U (en) * 2012-05-31 2013-04-03 江西稀有金属钨业控股集团有限公司 Extraction groove with groove cover sealing device
CN103472187A (en) * 2013-08-29 2013-12-25 国家电网公司 Movable detection device of boiler combustion
CN203432825U (en) * 2013-09-23 2014-02-12 国家电网公司 Flow-equalized anti-blocking flue gas sampling gun
CN204085789U (en) * 2014-04-09 2015-01-07 国家电网公司 Coal-fired boiler air preheater measuring system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3512556B2 (en) * 1996-03-22 2004-03-29 日本碍子株式会社 Dust concentration measurement device
CN2575672Y (en) * 2002-09-26 2003-09-24 马克文 Inverted antisand wind speed sensor
CN101556220A (en) * 2009-05-26 2009-10-14 郑州市光力科技发展有限公司 Air pumping, sampling and detecting device and quick pumping and sampling system and method
CN202089386U (en) * 2011-05-24 2011-12-28 山东新康恒工贸有限公司 Liquid seal emulsion barrel
CN202141562U (en) * 2011-07-26 2012-02-08 山东电力研究院 Coal-fired boiler air preheater air leakage on-line monitoring device
CN102671418A (en) * 2012-05-31 2012-09-19 江西稀有金属钨业控股集团有限公司 Extraction tank with tank cover sealing device
CN202844630U (en) * 2012-05-31 2013-04-03 江西稀有金属钨业控股集团有限公司 Extraction groove with groove cover sealing device
CN103472187A (en) * 2013-08-29 2013-12-25 国家电网公司 Movable detection device of boiler combustion
CN203432825U (en) * 2013-09-23 2014-02-12 国家电网公司 Flow-equalized anti-blocking flue gas sampling gun
CN204085789U (en) * 2014-04-09 2015-01-07 国家电网公司 Coal-fired boiler air preheater measuring system

Cited By (6)

* Cited by examiner, † Cited by third party
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
CN105021357B (en) * 2015-06-24 2017-05-10 华北电力科学研究院有限责任公司 Air preheater air leakage rate determination method and device
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
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

Similar Documents

Publication Publication Date Title
JP2008544281A (en) Mass velocity and area weighted averaging fluid composition sampling device and mass flow meter
EP2801797A1 (en) Steam flow metering device and metering method therefor
CN203432825U (en) Flow-equalized anti-blocking flue gas sampling gun
CN205562498U (en) Sealed pH meter interface
CN202304903U (en) Exact air quantity measuring system
CN103454383A (en) Dynamic response performance test system for gas sensor
CN202584505U (en) Test instrument for venturi and orifice plate flowmeters
CN203321939U (en) Hydraulic cylinder internal leakage composite detection system
CN203420702U (en) Coal bed gas shaft gas-liquid two-phase flow simulation device
Kabaciński et al. Numerical and experimental research on new cross-sections of averaging Pitot tubes
CN104330320B (en) Device for measuring combined action of washout and high-temperature corrosion of oil well tubular column
CN102269690A (en) Method and device for testing frictional drag coefficient of inner wall of pipeline
CN106683722B (en) Cluster passage flows pressure measurement experimental provision
CN203178161U (en) Fracturing fluid pipeline friction measuring device
CN102798511A (en) Test unit for refining test of flow field in hydraulic machine
CN103471686B (en) A kind of gas flow standard device and application process thereof
CN105628858A (en) Catalyst performance testing system
CN204882168U (en) Large -sized boiler flue net sampling device
CN103335939B (en) Pipe flow type inner wall erosion corrosion test device
CN201732497U (en) Reynolds experimental apparatus
CN205300835U (en) Flow flow resistance coefficient detection device of valve
CN203299030U (en) Integrated flue gas collecting and testing device with sealing part
CN202141562U (en) Coal-fired boiler air preheater air leakage on-line monitoring device
CN102680545A (en) Test instrument for detecting electrolyte item and total carbon dioxide
CN202075022U (en) On-line real-flow verification device for small natural gas flow meter

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20140723

RJ01 Rejection of invention patent application after publication