CN102322971A - Long service life wall temperature measuring device of boiler tube in boiler - Google Patents

Long service life wall temperature measuring device of boiler tube in boiler Download PDF

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Publication number
CN102322971A
CN102322971A CN201110233385A CN201110233385A CN102322971A CN 102322971 A CN102322971 A CN 102322971A CN 201110233385 A CN201110233385 A CN 201110233385A CN 201110233385 A CN201110233385 A CN 201110233385A CN 102322971 A CN102322971 A CN 102322971A
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CN
China
Prior art keywords
thermocouple
boiler tube
tube
boiler
temperature measuring
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Application number
CN201110233385A
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Chinese (zh)
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CN102322971B (en
Inventor
贾建民
马红
贺锡鹏
姚兵印
张磊
刘福广
李太江
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Priority to CN201110233385.2A priority Critical patent/CN102322971B/en
Publication of CN102322971A publication Critical patent/CN102322971A/en
Application granted granted Critical
Publication of CN102322971B publication Critical patent/CN102322971B/en
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Abstract

The invention discloses a long service life wall temperature measuring device of a boiler tube in a boiler, which comprises a thermocouple protecting tube fastened on the outer wall of the boiler tube, wherein a thermocouple connected with a thermotechnical terminal box penetrates into one end of the thermocouple protecting tube and extend out from the other end of the thermocouple protecting tube; and the out-extending thermocouple, i.e., a temperature measuring terminal of the thermocouple, is fastened onto the outer wall of the boiler tube through a temperature measuring terminal device of the thermocouple. The temperature measuring terminal of the thermocouple of the long service life wall temperature measuring device is placed in the temperature measuring terminal device of the thermocouple, and the temperature measuring terminal device of the thermocouple is fixed on the outer wall of the boiler tube in a comprehensive metallurgical bonding manner, so the temperature measuring terminal of the thermocouple is guaranteed to be closely combined with the outer wall of the boiler tube and is difficult to fall off during operation; since the temperature measuring terminal of the thermocouple is closely combined with the outer wall of the boiler tube, the measuring accuracy is guaranteed; meanwhile, by adopting the mounting manner, the oxidation, the corrosion and the erosion of flue gas are completely cut off, so the long service life of the measuring device is guaranteed; and the thermocouple protecting tube is firmly fixed on the outer wall of the boiler tube, so the thermocouple protecting tube and the thermocouple can be cooled by media in the boiler tube and cannot be damaged due to over high temperature, so the long service life of the measuring device can be guaranteed.

Description

Boiler tube long-life wall temperature measurement device in the stove
Technical field
The invention belongs to temperature measuring equipment, be specifically related to boiler tube long-life wall temperature measurement device in a kind of stove.
Background technology
Great deal of research results shows; In the boiler heating surface pipe furnace pipe overtemperature or metal temperature level too high be that steam side oxide skin takes place to grow fast and brings out the underlying cause that peels off in early days; And start and stop stove excessive velocities is to cause one of most important factor that the oxide skin large tracts of land peels off; Therefore; How the running temperature level of pipe and control start and stop stove speed are to prevent that boiler tube inner wall oxide skin from early stage large tracts of land taking place peel off and cause the most effectively one of preventive measure that boiler heating surface lost efficacy in the effective monitoring stove, also are prevention boiler tube overtemperatures, ensure the effective measures of unit safety operation.
The wall temperature measurement device of present domestic most heat power plant boiler pipes mainly is arranged in burner hearth outer (in the big bag), and the wall temperature measuring point is owing to the reason of high temperature easy burn-out is then installed seldom in the stove; It is to use when making an experiment that wall temperature measurement device in the minority boiler is arranged; Thermometric end and outer surface of tube wall are the modes that adopts mechanical fixation; Can not the accurate response pipe surface temperature and operational process in come off easily, generally have only the life-span of some months, generally have only the life-span of some months; Also having the interior wall temperature measurement device of minority stove is with the stupalith protection, and same serviceable life is very short because the measurement mechanism temperature is too high.
The temperature monitoring point of current most boiler of power plant pipes all is arranged on burner hearth outer (in the big bag) pipeline section that directly is not heated; Because the temperature that these measuring points are monitored only is the temperature of this pipe outlet, can not reflect the actual motion temperature levels of stove inner tubal wall exactly; The rising or falling speed of reasonable control stove inner tubal wall metal temperature brought very big difficulty when the hysteresis quality of wall temperature measuring point monitor temperature was also given the start and stop furnace operating in the big bag.
Summary of the invention
The object of the present invention is to provide a kind of metal temperature that can show the stove inner tubal wall intuitively; Grasp boiler tube pipe surface temperature in the stove exactly; Monitor the running temperature level of pipe in the stove effectively; The difference of overall understanding boiler tube different parts temperature, for the operations staff in time grasp heating surface working condition, avoid long-time overtemperature of metal pipe-wall or serious overheating problem, ensure boiler tube long-life wall temperature measurement device in the stove of unit safety operation.
For achieving the above object; The technical scheme that the present invention adopts is: comprise the protecting tube that is fastened on the boiler tube outer wall; The thermopair that is connected with thermal technology's terminal box from thermopair protection tube one end penetrate, the other end stretches out, the thermopair that stretches out is that thermopair thermometric end is fastened on the boiler tube outer wall through the thermocouple temperature measurement end device.
Thermopair of the present invention adopts K type armoured thermocouple.
Protecting tube is drawn by furnace roof, and the furnace interior branch is welded on the boiler tube outer wall.
The thermocouple temperature measurement end device is welded on the boiler tube outer wall with the mode of comprehensive metallurgical binding, in the oblique insertion thermocouple temperature measurement of the thermocouple temperature measurement end end device.
Have the following advantages aspect the serviceable life of the present invention's wall temperature measurement device in guaranteeing stove and the accuracy: the thermocouple temperature measurement end places the thermocouple temperature measurement end device; The thermometric end device has adopted specific structure pattern and mounting means: the thermocouple temperature measurement end device is fixed on the boiler tube outer wall through comprehensive metallurgical binding mode; Guaranteed that the thermocouple temperature measurement end combines difficult drop-off tight and in service with the boiler tube outer wall, also owing to thermocouple temperature measurement end and the tight accuracy that guarantees measurement of boiler tube outer wall combination; This mounting means oxidation, corrosion and the erosion that have completely cut off flue gas simultaneously guaranteed long-life of measurement mechanism.Protecting tube fastens on the boiler tube outer wall, guaranteed protecting tube and thermopair receive medium in the boiler tube cooling and can be because of the too high damage of temperature, thereby can guarantee long-life of measurement mechanism.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
Referring to Fig. 1; The present invention includes by furnace roof and draw the protecting tube 2 that is welded on the boiler tube outer wall 1; The less K type armoured thermocouple 4 of the diameter that is connected with thermal technology's terminal box 6 from thermopair protection tube 2 one ends penetrate, the other end stretches out; Thermocouple temperature measurement end device 3 is welded on the boiler tube outer wall 1, and the thermopair 4 that stretches out is in the oblique insertion thermocouple temperature measurement of the thermopair thermometric end end device 3.
Advantage applies of the present invention exists:
1) thermopair 4 adopts the less K type armoured thermocouple of diameters, can guarantee that on the one hand thermopair is difficult for being blown, breaking, and can avoid the excessive and accuracy of influence measurement of thermometric end and boiler tube outer wall 1 contact on the other hand;
2) in the oblique insertion thermocouple temperature measurement of the thermocouple temperature measurement end end device; The thermometric end device has specific structure pattern and installation method; Adopt welding manner that thermocouple temperature measurement end device 3 is fixed on the boiler tube outer wall 1; Can guarantee that like this thermocouple temperature measurement end and boiler tube outer wall 1 are comprehensive metallurgical binding, this combination makes the thermometric end reflect the temperature of tube wall truly; This mounting means oxidation, corrosion and the erosion that have completely cut off flue gas simultaneously guaranteed long-life of measurement mechanism, and the thermocouple temperature measurement end combines closely to be in operation difficult drop-off with the boiler tube outer wall.
3) protecting tube 2 adopts welding manner to be fixed on the boiler tube outer wall 1; And draw by furnace roof; Guaranteed protecting tube 2 and thermopair 4 receive medium in the boiler tube cooling and can be because of the too high damage of temperature in the stove, thereby can guarantee long-life of measurement mechanism.
Through application of the present invention; The metal temperature that can show the stove inner tubal wall intuitively; Grasp the situation of boiler tube pipe surface temperature in the stove exactly; Can monitor the running temperature level of pipe in the stove effectively, the difference condition of overall understanding boiler tube different parts temperature, for the operations staff in time grasp heating surface working condition, avoid long-time overtemperature of metal pipe-wall or serious overheating problem, ensure that unit safety operation provides advantageous methods.

Claims (4)

1. boiler tube long-life wall temperature measurement device in the stove; It is characterized in that: comprise the protecting tube (2) that is fastened on the boiler tube outer wall (1); The thermopair (4) that is connected with thermal technology's terminal box (6) from thermopair protection tube (2) one ends penetrate, the other end stretches out, the thermopair that stretches out (4) is that thermopair thermometric end is fastened on the boiler tube outer wall (1) through thermocouple temperature measurement end device (3).
2. boiler tube long-life wall temperature measurement device in the stove according to claim 1 is characterized in that: described thermopair (4) adopts K type armoured thermocouple.
3. boiler tube long-life wall temperature measurement device in the stove according to claim 1, it is characterized in that: described protecting tube (2) is drawn by furnace roof, and the furnace interior branch is welded on the boiler tube outer wall (1).
4. boiler tube long-life wall temperature measurement device in the stove according to claim 1; It is characterized in that: described thermocouple temperature measurement end device (3) is welded on the boiler tube outer wall (1) with the mode of comprehensive metallurgical binding, in the oblique insertion thermocouple temperature measurement of the thermocouple temperature measurement end end device (3).
CN201110233385.2A 2011-08-16 2011-08-16 Long service life wall temperature measuring device of boiler tube in boiler Active CN102322971B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110233385.2A CN102322971B (en) 2011-08-16 2011-08-16 Long service life wall temperature measuring device of boiler tube in boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110233385.2A CN102322971B (en) 2011-08-16 2011-08-16 Long service life wall temperature measuring device of boiler tube in boiler

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CN102322971A true CN102322971A (en) 2012-01-18
CN102322971B CN102322971B (en) 2014-07-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103727521A (en) * 2014-01-20 2014-04-16 河南华润电力首阳山有限公司 Temperature-measuring element fixing device and boiler
CN103983369A (en) * 2014-06-05 2014-08-13 上海望特能源科技有限公司 Multiple-point fume temperature monitoring device for power station boiler flue and realizing method of device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040037350A1 (en) * 2002-08-26 2004-02-26 Parmicza Charles William Thermocouple holder for furnance tube
CN2916602Y (en) * 2006-02-27 2007-06-27 王衡 External wall temperature measuring point structure for boiler super-heater/reheater with reduced measuring error
CN101017112A (en) * 2006-12-12 2007-08-15 郑溪民 Thermocoupleassembly capable of being changed online
JP2010122232A (en) * 2010-01-08 2010-06-03 Sumitomo Metal Ind Ltd Heating furnace and thermometer
CN202204611U (en) * 2011-08-16 2012-04-25 西安热工研究院有限公司 Wall temperature measurement device with long service life for boiler tube in boiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040037350A1 (en) * 2002-08-26 2004-02-26 Parmicza Charles William Thermocouple holder for furnance tube
CN2916602Y (en) * 2006-02-27 2007-06-27 王衡 External wall temperature measuring point structure for boiler super-heater/reheater with reduced measuring error
CN101017112A (en) * 2006-12-12 2007-08-15 郑溪民 Thermocoupleassembly capable of being changed online
JP2010122232A (en) * 2010-01-08 2010-06-03 Sumitomo Metal Ind Ltd Heating furnace and thermometer
CN202204611U (en) * 2011-08-16 2012-04-25 西安热工研究院有限公司 Wall temperature measurement device with long service life for boiler tube in boiler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103727521A (en) * 2014-01-20 2014-04-16 河南华润电力首阳山有限公司 Temperature-measuring element fixing device and boiler
CN103983369A (en) * 2014-06-05 2014-08-13 上海望特能源科技有限公司 Multiple-point fume temperature monitoring device for power station boiler flue and realizing method of device
CN103983369B (en) * 2014-06-05 2016-10-26 上海望特能源科技有限公司 Station boiler flue multipoint mode cigarette temperature monitoring device and implementation method

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