CN201532256U - Boiler furnace outlet smoke temperature on-line monitoring system - Google Patents

Boiler furnace outlet smoke temperature on-line monitoring system Download PDF

Info

Publication number
CN201532256U
CN201532256U CN2009203139311U CN200920313931U CN201532256U CN 201532256 U CN201532256 U CN 201532256U CN 2009203139311 U CN2009203139311 U CN 2009203139311U CN 200920313931 U CN200920313931 U CN 200920313931U CN 201532256 U CN201532256 U CN 201532256U
Authority
CN
China
Prior art keywords
temperature
target
data
boiler
computer
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN2009203139311U
Other languages
Chinese (zh)
Inventor
肖炜
陈帮海
王维礼
张雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SICHUAN DONGNAO ELECTRONICAL ENGINEERING Co Ltd
Original Assignee
SICHUAN DONGNAO ELECTRONICAL ENGINEERING Co Ltd
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 SICHUAN DONGNAO ELECTRONICAL ENGINEERING Co Ltd filed Critical SICHUAN DONGNAO ELECTRONICAL ENGINEERING Co Ltd
Priority to CN2009203139311U priority Critical patent/CN201532256U/en
Application granted granted Critical
Publication of CN201532256U publication Critical patent/CN201532256U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model discloses a boiler furnace outlet smoke temperature on-line monitoring system, which comprises a target, a near-infrared imager, a data computer, an upper computer and an integrated controller. The target is arranged on a perpendicular section approaching a boiler smoke window and used for sensing temperature, the near-infrared imager is arranged on a lateral wall of a boiler horizontal flue and used for collecting target radiation energy within a viewing field range of the near-infrared imager, the data computer is connected with the near-infrared imager and used for processing data collected by the near-infrared imager and obtaining temperature data of the target, the upper computer is connected with the data computer and used for processing temperature data of the target, and the integrated controller is used as a bridge for the data computer, the upper computer and a portable computer for field debugging. The boiler furnace outlet smoke temperature on-line monitoring system has the advantages that the on-line monitoring system can on-line continuously monitor average temperature of a furnace outlet section, average temperature of the upper/lower side and left/right side and the highest/lowest temperature, can draw section temperature distribution curves, can set multiple alarming functions, and is favorable for safe and economical operation of large-capacity and high-parameter boilers.

Description

Boiler furnace outlet flue-gas temperature on-line monitoring system
Technical field
The utility model relates to a kind of boiler furnace outlet flue-gas temperature on-line monitoring system.
Background technology
The flue gas temperature of hearth outlet on-line monitoring system is used for large-sized station boiler furnace outlet section temperature distribution measuring.The outlet section is meant the outlet smokestack that is positioned at boiler horizontal gas pass, and the position that tangential firing mode, opposed firing mode, front wall firing mode and w flame combustion mode export smokestack has nothing in common with each other.It is very important to satisfying boiler design performance and operational reliability that furnace outlet cross section flue-gas temperature (hereinafter to be referred as the cigarette temperature) reaches design load.Factors such as the quantity of the total input heat of combustion system, burner hearth physical dimension, burner hearth, burner hearth soot blower and layout will influence the cigarette temperature, and excess air, burner hearth stain situation, burner and coal pulverizer and cut factors such as throwing array mode, ature of coal and also will influence the cigarette temperature during boiler operatiopn.If be subjected to the influence of above-mentioned certain factor, during furnace outlet gas temperature off-design value, will influence the security and the economy of boiler operatiopn.Before flue gas enters horizontal flue, through large-size screen monitors and upper furnace water-cooling wall absorption portion heat, when arriving the furnace outlet section, the gentle cigarette speed of cigarette presents the uneven distribution state along the short transverse and the Width of horizontal flue, according to the relevant run book demonstration of the mid-90 in 20th century, very its both sides cigarette temperature deviation of person can reach 100 ~ 200 ℃.Tangential firing boiler particularly, because it is to form a huge air-flow by four jiaos of peripheric jet flows in Furnace Aerodynamic Field, when arriving the outlet section, flue gas still has the particle asymmetric distribution on this section in residual rotation and the Dual-Phrase Distribution of Gas olid, make the temperature and the cigarette speed of outlet section that deflection take place, it is more inhomogeneous to cause the cigarette temperature to distribute.From the front wall of boiler, the cigarette temperature of this section one side, cigarette speed height, opposite side is then low.Because this cause can cause the heat again of both sides and temperature deviation appears in superheated vapor and the creep of tube panel overtemperature damages, the appearance booster that overtemperature is serious.While may cause the softening coking of flue dust on the heat interchange screen because temperature is too high, to the security and the economy generation significant impact of boiler operatiopn.
In the prior art, usually adopt cigarette temperature probe to monitor the boiler furnace outlet flue-gas temperature, cigarette temperature probe can only be monitored a point on the furnace outlet, can not effectively monitor furnace outlet whole, the Temperature Distribution situation that can't accurate response goes out whole of furnace outlet reduces with reference to property greatly to boiler attendance personnel's operation; And the complicated in mechanical structure of cigarette temperature probe is damaged easily.
Conventional flue gas temperature of hearth outlet on-line monitoring system is near the outer left and right sides, the furnace wall perforate installation sound wave emissions and the receiving transducer of the vertical profile the boiler smokestack, every pair of transducer composition line thermometric degree is right, measures with per second pulsed sound once; Some that the measurement of respective numbers (select for use according to boiler to) formed a complexity and temperature are relevant line temperature net in real time, draws temperature altitude matrix on the temperature face according to the temperature net; A monitoring element that is used for temperature correction is not installed in the routine monitoring system, is caused measuring error bigger.
Conventional system monitoring error mainly depends near pneumatic noise and the flame noise the boiler horizontal gas pass, and will overcome numerous interference is very difficult, and the routine monitoring system mainly adopts multifrequency point, sound phaselocked loop, wavelet transform filtering, digital signal time frequency analysis or the like technical finesse undesired signal.Because on-the-spot boiler noise is big, noise source is many and change with the variation of boiler operatiopn state, handles undesired signal and often can not reach good effect.
The utility model content
The utility model has overcome shortcoming of the prior art, a kind of boiler furnace outlet flue-gas temperature on-line monitoring system is provided, can on-line continuous monitoring furnace outlet section medial temperature, on/downside and a left side/right side medial temperature, the highest/minimum temperature, and can draw the section temperature distribution curve.The coal softening temperature (≤ST-100 ℃) (ST for coal-fired softening temperature) and the left and right sides temperature difference functions such as (Δ T 〉=50 ℃) warning that transfinite can be set.
The technical solution of the utility model is: a kind of boiler furnace outlet flue-gas temperature on-line monitoring system, be included in the target of arranging near the vertical profile of boiler smokestack, and be used for temperature-sensitive; The near infrared imaging instrument of installing on the side wall of boiler horizontal gas pass is used to gather the target emittance in its field range; With the data computer that described near infrared imaging instrument links to each other, be used to handle the data that the near infrared imaging instrument is gathered, obtain the temperature data of target; With the host computer that described data computer links to each other, be used for the temperature data of target is handled.
At the front end of described near infrared imaging instrument, being furnished with does not influence optical fiber and the cooling system that infrared ray passes through.
Described target is arranged near the smokestack cross section of furnace arch, furnace nose top, makes its radiation heat transfer surface be parallel to furnace wall; Target is made by carbofrax material; Separate with the high-performance thermal insulation material between target and the installation accessories.
The high precision thermal sensing element is installed in described target.
Near described near infrared imaging instrument, dispose a verification color comparison temperature measurement instrument, and image data is transferred to data computer.
On the side wall of boiler horizontal gas pass, respectively adorn a thermal resistance thermometer.
Adopt integrated controller, as data computer, host computer and field adjustable bridge circuit with laptop computer; Described integrated controller is contained in the field control cabinet.
Compared with prior art, the utility model has the advantages that: can on-line continuous monitoring furnace outlet section medial temperature, on/downside and a left side/right side medial temperature, the highest/minimum temperature, and can draw the section temperature distribution curve, multiple warning function can be set, the user can according to monitoring result judge tangential firing fireball center whether out of position, burner hearth and the tube panel zone soot blower etc. that whether should in time come into operation; Help safety, the economical operation of high capacity, high parameter boiler.Be in particular in:
1) by adopting the near infrared imaging instrument, and improve its sensitivity, the effective aperture that increases its optical system increases signal, and the noise that reduces signal Processing to be improving signal to noise ratio (S/N ratio), thereby reduces the monitoring error of system, improves temperature resolution, improves monitoring accuracy.
2) by the image recognition and the infrared tracer technique of computing machine, can overcome the trouble of bringing to measurement because of thermal expansion.
3) by front end optical fiber and cooling system are set, can guarantee the normal transmission of optical signalling better at the near infrared imaging instrument.
4) utilization computer picture recognition and infrared tracer technique automatic focus, each target radiation intensity that grasps all is the greatest irradiation value of corresponding target, keeps the consistance of continuous coverage.
5) target adopts the carbofrax material extruding to form by a firing, and can guarantee in environment for use the not factor affecting serviceable life of Yin Wendu, wearing and tearing.
6) by high precision thermal sensing element, configuration verification color comparison temperature measurement instrument are installed, be used to proofread and correct near infrared imaging instrument measuring error in target, guarantee that the temperature measurement accuracy of system reaches 1.5%.
7) by adopting following means, further improved the accuracy of systematic survey: target is arranged near the smokestack cross section of furnace arch, furnace nose top, and the radiation heat transfer surface is parallel to furnace wall, makes target and furnace wall that radiation heat transfer be arranged; Separate with the high-performance thermal insulation material between target and the installation accessories; On the horizontal flue both walls, respectively adorn a thermal resistance thermometer.
8) by the setting of warning system, can be achieved as follows function:
(1) in the boiler startup stage, before the red switch, the monitoring flue gas temperature of hearth outlet is not no more than 540 ℃ to steam turbine, the protection reheater.
(2) when temperature reaches (ST-100 ℃), in time drop into the burner hearth soot blower, increase burner hearth heat absorption share, reduce flue-gas temperature, the while also in time drops into the purging device in horizontal flue zone, reduces the coking of water-cooling wall and horizontal flue tube bank.
When (3) an outlet section left side/right temperature deviation is big, adjust air-supply, reduce a left side/right flue-gas temperature deviation.
When (4) the cigarette temperature is higher, reduce air output, reduce flue gas loss, improve unit efficiency.
9) output of native system can be used as the input data of repair based on condition of component system of power plant, for the expected life of judging superheater and reheater screen pipe provides data.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a system chart of the present utility model.
Embodiment
Disclosed all features in this instructions, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
A kind of boiler furnace outlet flue-gas temperature on-line monitoring system comprises: a plurality of targets that are used for temperature-sensitive of arranging near the vertical profile the boiler smokestack; On the side wall of boiler horizontal gas pass, four near infrared imaging instrument installing, be used to gather the interior target emittance of its field range and carry out data processing via data computer (band monitor), obtain the temperature data of target, then, the temperature data of target is converted into the flue-gas temperature of target position, the data processing of the line correlation of going forward side by side by host computer (band mouse, keyboard, monitor).
At the front end of near infrared imaging instrument, being furnished with does not influence optical fiber and the cooling system that infrared ray passes through, in order to guarantee the normal transmission of optical signalling.
Target adopts carbofrax material, and extruding forms by a firing, to guarantee in environment for use the not factor affecting serviceable life of Yin Wendu, wearing and tearing.
Since contain in the flue gas a certain amount of dust (<200g/m3), can the blocks infrared radiation wave propagation.For the temperature measurement accuracy of guaranteeing system reaches 1.5%, the high precision thermal sensing element is installed in target, be used to proofread and correct near infrared imaging instrument measuring error; Also dispose a verification color comparison temperature measurement instrument, guarantee employed wavelength and near infrared imaging instrument consistent wavelength, full scale precision≤0.5%.When on measuring path, existing smog, dust that emittance is caused decay, can not exert an influence to measurement result.The temperature signal of verification color comparison temperature measurement instrument enters computing machine, revises the temperature radiation strength relationship curve of near infrared imaging instrument in 800 ~ 1200 ℃ measurement range, makes measuring accuracy satisfy system requirements.
Target is arranged near the smokestack cross section of furnace arch, furnace nose top, make the radiation heat transfer surface be parallel to furnace wall, the flame in the burner hearth " is can't see " on the radiation heat transfer surface, " can't see " tube panel, " can only see " side wall of horizontal flue, promptly target and furnace wall have radiation heat transfer.Separate with the high-performance thermal insulation material between target and the installation accessories, and ignore conduction error.
Respectively adorn a thermal resistance thermometer on the horizontal flue both walls, during with box lunch (Tijk-50)=TQ, final temperature field measurement, Tijk are the temperature value of target, and TQ is the mean value of two thermometers.
As shown in Figure 1, purge and cooled compressed air in order to guarantee that the near infrared imaging instrument provides, guarantee the reliability of power supply etc., native system disposes integrated controller, as data computer, host computer, field adjustable is with the bridge circuit of laptop computer with integrated controller.Integrated controller is contained in the field control cabinet, being responsible for power supply in the field control cabinet inserts, the power supply redundancy configuration, the distribution and the supervision of power supplys such as near infrared imaging instrument, data computer, valve sets, temperature of furnace wall transmitter, the relevant control of valve sets, temperature of furnace wall, verification inserts with colorimetric infrared thermometer signal.Integrated controller has independent data collection, device control and construction of computer network ability easily.The I/O point is that bleed pressure, valve reach the signal that position/pass puts in place, and these signals are determined the resultant fault signal of native system in integrated controller.Switch board also provides 24VDC signal for native system, is used for temperature transmitter.
Native system also is provided with warning device, all can send alerting signal under following situation:
1) in the boiler startup stage, steam turbine is not before the red switch, when certain measuring point temperature equals 540 ℃.
When 2) medial temperature is greater than (ST-100 ℃).
When 3) an outlet section left side/right temperature difference is greater than 50 ℃.
When 4) system does not put into operation.
When 5) resultant faults such as near infrared imaging instrument power supply forfeiture, forfeiture cooling source of the gas and cooling bleed pressure be low occurring.
Principle of work of the present utility model: by the temperature-sensitive of target, the target emittance that the near infrared imaging instrument is gathered, and carry out data processing via data computer, obtain the temperature data of target, be converted into the flue-gas temperature of target position then by host computer, the data processing of being correlated with simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims (7)

1. a boiler furnace outlet flue-gas temperature on-line monitoring system is characterized in that: be included in the target of arranging near the vertical profile of boiler smokestack, be used for temperature-sensitive; The near infrared imaging instrument of installing on the side wall of boiler horizontal gas pass is used to gather the target emittance in its field range; With the data computer that described near infrared imaging instrument links to each other, be used to handle the data that the near infrared imaging instrument is gathered, obtain the temperature data of target; With the host computer that described data computer links to each other, be used for the temperature data of target is handled.
2. boiler furnace outlet flue-gas temperature on-line monitoring system according to claim 1 is characterized in that: at the front end of described near infrared imaging instrument, being furnished with does not influence optical fiber and the cooling system that infrared ray passes through.
3. boiler furnace outlet flue-gas temperature on-line monitoring system according to claim 1 is characterized in that: described target is arranged near the smokestack cross section of furnace arch, furnace nose top, makes its radiation heat transfer surface be parallel to furnace wall; Target is made by carbofrax material; Separate with the high-performance thermal insulation material between target and the installation accessories.
4. boiler furnace outlet flue-gas temperature on-line monitoring system according to claim 1 is characterized in that: the high precision thermal sensing element is installed in described target.
5. boiler furnace outlet flue-gas temperature on-line monitoring system according to claim 1 is characterized in that: dispose a verification color comparison temperature measurement instrument near described near infrared imaging instrument, and image data is transferred to data computer.
6. boiler furnace outlet flue-gas temperature on-line monitoring system according to claim 1 is characterized in that: respectively adorn a thermal resistance thermometer on the side wall of boiler horizontal gas pass.
7. according to the described boiler furnace outlet flue-gas temperature of each claim on-line monitoring system in the claim 1 to 6, it is characterized in that: adopt integrated controller, as data computer, host computer and field adjustable bridge circuit with laptop computer; Described integrated controller is contained in the field control cabinet.
CN2009203139311U 2009-11-03 2009-11-03 Boiler furnace outlet smoke temperature on-line monitoring system Expired - Fee Related CN201532256U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009203139311U CN201532256U (en) 2009-11-03 2009-11-03 Boiler furnace outlet smoke temperature on-line monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009203139311U CN201532256U (en) 2009-11-03 2009-11-03 Boiler furnace outlet smoke temperature on-line monitoring system

Publications (1)

Publication Number Publication Date
CN201532256U true CN201532256U (en) 2010-07-21

Family

ID=42527659

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009203139311U Expired - Fee Related CN201532256U (en) 2009-11-03 2009-11-03 Boiler furnace outlet smoke temperature on-line monitoring system

Country Status (1)

Country Link
CN (1) CN201532256U (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101806626A (en) * 2010-03-03 2010-08-18 四川东脑电气工程有限公司 Online monitoring method for flue gas temperature of hearth outlet of power station boiler
CN103791515A (en) * 2014-02-19 2014-05-14 上海交通大学 Hearth outlet smoke temperature on-line soft-measurement system of coal-fired boiler
CN105021028A (en) * 2015-08-10 2015-11-04 宜兴福鼎环保工程有限公司 Rotary kiln
CN105509890A (en) * 2015-11-25 2016-04-20 南京建磊电力技术有限公司 On-line infrared measurement apparatus for hearth flue-gas temperature
CN105758208A (en) * 2016-03-18 2016-07-13 沈阳飞机工业(集团)有限公司 High-temperature heat treatment non-contact temperature uniformity detection system and method
CN105940277A (en) * 2014-02-10 2016-09-14 霍尼韦尔国际公司 Multi resolution, hierarchical radiance field estimation
CN108254080A (en) * 2018-02-01 2018-07-06 天津德尔泰热控系统有限公司 The system and method in station boiler temperature field is established using gas infra-red radiation superimposed characteristics
CN111736637A (en) * 2020-05-20 2020-10-02 山东中实易通集团有限公司 Steam temperature control system and method based on hearth temperature measurement

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101806626A (en) * 2010-03-03 2010-08-18 四川东脑电气工程有限公司 Online monitoring method for flue gas temperature of hearth outlet of power station boiler
CN105940277B (en) * 2014-02-10 2018-07-17 霍尼韦尔国际公司 Multiresolution, layering radiation field estimation
CN105940277A (en) * 2014-02-10 2016-09-14 霍尼韦尔国际公司 Multi resolution, hierarchical radiance field estimation
CN103791515A (en) * 2014-02-19 2014-05-14 上海交通大学 Hearth outlet smoke temperature on-line soft-measurement system of coal-fired boiler
CN103791515B (en) * 2014-02-19 2016-05-04 上海交通大学 Coal-burning boiler burner hearth exit gas temperature online soft sensor system
CN105021028A (en) * 2015-08-10 2015-11-04 宜兴福鼎环保工程有限公司 Rotary kiln
CN105509890A (en) * 2015-11-25 2016-04-20 南京建磊电力技术有限公司 On-line infrared measurement apparatus for hearth flue-gas temperature
CN105758208A (en) * 2016-03-18 2016-07-13 沈阳飞机工业(集团)有限公司 High-temperature heat treatment non-contact temperature uniformity detection system and method
CN105758208B (en) * 2016-03-18 2019-01-15 沈阳飞机工业(集团)有限公司 High-temperature heat treatment non-contact temperature uniformity detection system and its detection method
CN108254080A (en) * 2018-02-01 2018-07-06 天津德尔泰热控系统有限公司 The system and method in station boiler temperature field is established using gas infra-red radiation superimposed characteristics
CN108254080B (en) * 2018-02-01 2020-06-30 天津德尔泰热控系统有限公司 System and method for establishing power station boiler temperature field by using gas infrared radiation superposition characteristics
CN111736637A (en) * 2020-05-20 2020-10-02 山东中实易通集团有限公司 Steam temperature control system and method based on hearth temperature measurement

Similar Documents

Publication Publication Date Title
CN201532256U (en) Boiler furnace outlet smoke temperature on-line monitoring system
CN101806626A (en) Online monitoring method for flue gas temperature of hearth outlet of power station boiler
CN105276563B (en) A kind of furnace outlet gas temperature flexible measurement method based on the real-time slagging scorification situation of burner hearth
CN106247308B (en) Boiler scaling condition monitoring based on furnace exit temperature and control method
US20190113417A1 (en) Method for acquiring thermal efficiency of a boiler
CN101393436A (en) dual model approach for boiler section cleanliness calculation
CN109189020A (en) A kind of Large-sized Coal-fired Power group combustion system integrated monitoring based on static and dynamic performance Cooperative Analysis
CN104697911A (en) Device and method for continuous online measurement of concentration of wet flue gas particles in coal-fired power plant
Guo et al. Experimental and numerical investigations on heat transfer characteristics of a 35MW oxy-fuel combustion boiler
CN105698158A (en) Method for detecting four-tube leak of circulating fluidized bed boiler
Costa et al. Combustion characteristics of a front-wall-fired pulverized-coal 300 MWe utility boiler
CN106066208A (en) A kind of device and method of coal-fired power station boiler high temperature superheater wall surface temperature on-line monitoring
CN102226772B (en) Device for measuring carbon content of fly ash in boiler of electric power plant
CN104132749A (en) Device for measuring furnace hearth temperature through sound waves and measuring method
CN108645571A (en) The device and method of coal-powder boiler or circulating fluidized bed boiler tiny leakage for identification
CN106932100A (en) A kind of air preheater device for detecting temperature
CN106872049A (en) A kind of turbine blade surface temperature measuring equipment
Butler et al. Measurement of time-resolved local particle cloud temperature in a full-scale utility boiler
CN206724998U (en) A kind of heat recovery heat exchanger work condition inspection system
CN207112772U (en) Boiler hearth temperature on-line prediction system based on core offset minimum binary
CN110411397A (en) A kind of on-Line Monitor Device and method of horizontal flue bottom dust stratification thickness
CN103791515A (en) Hearth outlet smoke temperature on-line soft-measurement system of coal-fired boiler
CN205227276U (en) Spectrum formula boiler anti -coking system
CN106017693B (en) The On-line Measuring Method of flying dust image collecting device and Spectrum attenuation coefficient and scattering albedo in station boiler flue
CN103822857A (en) Online measurement method of fineness of boiler coal powder, apparatus thereof and inductive charge sensor

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100721

Termination date: 20151103

EXPY Termination of patent right or utility model