CN104132749A - Device for measuring furnace hearth temperature through sound waves and measuring method - Google Patents

Device for measuring furnace hearth temperature through sound waves and measuring method Download PDF

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Publication number
CN104132749A
CN104132749A CN201410420675.1A CN201410420675A CN104132749A CN 104132749 A CN104132749 A CN 104132749A CN 201410420675 A CN201410420675 A CN 201410420675A CN 104132749 A CN104132749 A CN 104132749A
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China
Prior art keywords
temperature
gas
sound wave
receiver
measuring
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CN201410420675.1A
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Chinese (zh)
Inventor
吕实诚
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Harbin Lida Shengyuan Technology Development Co Ltd
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Harbin Lida Shengyuan Technology Development Co Ltd
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Priority to CN201410420675.1A priority Critical patent/CN104132749A/en
Publication of CN104132749A publication Critical patent/CN104132749A/en
Withdrawn legal-status Critical Current

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Abstract

The invention relates to a device for measuring furnace hearth temperature through sound waves and a measuring method. The device and method aim to solve the problems that a traditional device for measuring the furnace hearth temperature and a traditional measuring method are inaccurate in measurement, the purposes of reducing energy consumption and prolonging service life of a boiler are not achieved, the device and method are limited in actual application, popularization of the device for measuring the furnace hearth temperature is restrained, and meanwhile certain electrical elements are poor in sensitivity due to being heated. The device for measuring the furnace hearth temperature comprises a receiver 1. The receiver is communicated with an instrument air source and is connected with a signal processor 2, the signal processor is connected with a trigger 4, the trigger is connected with a sound wave generator 3, and the sound wave generator is connected with an air source 5. The device and method are used for measuring the temperature inside the furnace hearth of the boiler.

Description

Sound wave measurement fire box temperature device and assay method
technical field:
the present invention relates to a kind of Sound wave measurement fire box temperature device and assay method.
background technology:
tradition temperature measuring device for hearth mainly contains contact (telescopic thermometer) and contactless two classes, and contactless common have radiation thermometer and spectrographic images detection system, the shortcoming that these technology exist is:
1) contact (telescopic thermometer)
at present the boiler of 300MW and above unit is all joined the telescopic thermometer that is provided with expensive measurement flue gas temperature of hearth outlet, but due to probe very long, heavy, the yielding bite that gos deep into burner hearth, failure rate is high, and therefore, many power plant are in fact inactive.In addition, probe is limited by heatproof, generally only in the time of boiler startup, stretches into burner hearth and measures exit gas temperature, in the time that cigarette temperature reaches certain value, must exit burner hearth at once, and therefore, it allows serviceability temperature scope and acts on also limited.
2) radiation thermometer
well-known burner hearth gas radiation is scarcely in visible-range, and therefore, common radiation thermometer is mainly infrared type thermometer at present, the infrared light intensity in its measurement surface or region.Because burner hearth flue gas is that gaseous state is luminous, temperature distributing disproportionation is even, and composition is unfixing, adds the existence of fly ash granule radiation, and therefore, spectral wavelength and the penetration power etc. of composition are uncertain, thereby cause tested region uncertain, and measuring error is large.Due to above-mentioned disadvantages affect the application of radiation thermometer in boiler furnace smoke temperature measurement field.
3) fly ash granule radiation spectrum is measured
this class temperature measurement system is that to utilize in image detection burner hearth flue gas be mainly visible ray (bag Chinese juniper certain wavelength infrared light of fly ash granule radiation, to improve the temperature survey upper limit), machine carries out extremely complicated image processing as calculated, thereby obtains the Temperature Distribution of flue gas in burner hearth.Owing to being subject to the impact of fly ash granule constituent concentration and distribution, the impacts such as camera lens pollution and complex image Processing Algorithm, measuring error is large; Also there is very large uncertainty in measured region.Add lighting system complexity, coking or dust stratification make camera lens maintenance difficulty, and poor reliability is expensive.Thereby this type systematic is restricted in the practical implementation of burner hearth flue gas temperature measurement.
summary of the invention:
the object of this invention is to provide a kind of Sound wave measurement fire box temperature device and assay method.
above-mentioned object realizes by following technical scheme:
a kind of Sound wave measurement fire box temperature device, its composition comprises: receiver, described receiver communicates with instrument air, described receiver is connected with signal processor, described signal processor is connected with trigger, described trigger is connected with sonic generator, and described sonic generator is connected with air-source.
the assay method of described Sound wave measurement fire box temperature device, the method comprises the following steps:
(1) velocity of sound that the ultimate principle of acoustic measurement fire box temperature is based upon in gas is on the fact changing like that according to the function of a temperature, and is further subject to along the impact of the gas ingredients of sound travel, and opening relationships equation is:
?c?=?d/t=sqrt[rRT/M]
here r is the specific heat of gas, and under normal pressure, the specific heat of gas is a constant, M gas molal weight Kg/mol), R is gas law constant (8.314J/K-MOL), T absolute temperature Calvin;
(2) sonic generator is arranged on to one side of stove or boiler, receiver is arranged on to opposite side, an acoustic signals just can be transmitted device transceiver and survey, distance between forwarder and receiver is known fixing, and the measurement in the travel-time of acoustic signals allows to carry out the calculating of gas medial temperature according to the path between forwarder and receiver.
the assay method of described Sound wave measurement fire box temperature device, for the certain output of heating furnace, realizes the reduction of fuel consumption by the space temperature condition that allows thermal radiation field approach even and balance.
the assay method of described Sound wave measurement fire box temperature device, the calculating of gas medial temperature is by computer generated image technology, and several two radiation images of picked-up, carry out calculation system according to the decay of Fire Radiation from different directions.
the assay method of described Sound wave measurement fire box temperature device, conversion through application from from absolute temperature to Fahrenheit temperature, obtain the relational expression of a Qi Ti Wen Du ℉ and travel-time, propagation distance, gas componant, in TF=(d/Bt) 2 × 106-460 formulas: TF=Qi Ti Wen Du ℉ d=propagation distance ft, B=sound wave constant=sqrt[rR/M] the t=travel-time, (ms) equation below of application, temperature also can be by TC=(d/Bt) 2 × 106-273.16 d=propagation distance here of expressing Celsius.
beneficial effect of the present invention:
1, the present invention can monitor heat spot, and protection body of heater and workpiece reduce unplanned property and shut down, and realize safety in production.Due in stove combustion process, sound wave gas temperature measurement system can provide accurate real-time temperature profile data and warning function for us, for the control of temperature provides valuable data information.We can, according to these data, monitor the phenomenon that has or not the direct flush water cold wall pipe of flame, adjust flame location to avoid direct flush water cold wall pipe, avoid the damage of water screen tube, improve stove water circulation and improve operational efficiency.Supervision has or not low-temperature space is identified obstruction according to this or abnormal burner of working, thereby improves its air/burning ratio, improve oil spout or burning distribution, mixing and stove water circulation, improves heating power and distributes and operational efficiency.Increase the service life and reduce hear rate.
, the present invention can save energy and reduce the cost, reduce flying dust and soot emissions, can make us pass through control set for adjusting, reasonably change ratio and other factors of fuel and air, stove is worked under the most reasonable optimized burning condition, realize optimization burning (perfect combustion), reach energy-saving and cost-reducing, reduce flying dust and soot emissions, reduce the object of operating cost.
, the present invention can extend serviceable life of stove, reduce consuming cost, cut down expenses, the present invention is a kind of one-time investment, the permanent non-intrusion measurement instrument using, its use, makes us can substitute the temperature element of thermopair and so on the one hand, there is no the long-term consumption of these components and parts, saved spending.On the other hand, make us avoid the burning of body of heater, extended the serviceable life of body of heater.Meanwhile, also avoided because body of heater burning damages the caused loss that stops production.
, the present invention's rate of can reducing the number of rejects and seconds, improve the quality of products, reduce production costs in hot-working, user can be according to temperature data provided by the invention, correct furnace temperature and the Temperature Distribution controlled, provide reliable technology ensuring for producing qualified product, improved product quality and production efficiency, reduced again production cost.Passing through control device, reasonably change Temperature Distribution, make within temperature is controlled in rational scope, avoided the phenomenons such as too high or too low for temperature, local burning, so just can avoid the damage producing due to stove and product burning, reduce unacceptable product.For safety in production provides Reliable guarantee.
brief description of the drawings:
accompanying drawing 1 is structural representation of the present invention.
embodiment:
embodiment 1:
a kind of Sound wave measurement fire box temperature device, its composition comprises: receiver 1, described receiver communicates with instrument air, described receiver is connected with signal processor 2, described signal processor is connected with trigger 4, described trigger is connected with sonic generator 3, and described sonic generator is connected with air-source 5.
embodiment 2:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 1, the method comprises the following steps:
(1) by the fact of function, opening relationships equation is:
?c?=?d/t=sqrt[rRT/M]
here r is the specific heat of gas, and under normal pressure, the specific heat of gas is a constant, M gas molal weight Kg/mol), R is gas law constant (8.314J/K-MOL), T absolute temperature Calvin;
(2) sonic generator is arranged on to one side of stove or boiler, receiver is arranged on to opposite side, an acoustic signals just can be transmitted device transceiver and survey, distance between forwarder and receiver is known fixing, and the measurement in the travel-time of acoustic signals allows to carry out the calculating of gas medial temperature according to the path between forwarder and receiver.
embodiment 3:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 2, for the certain output of heating furnace, realize the reduction of fuel consumption by the space temperature condition that allows thermal radiation field approach even and balance.
embodiment 4:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 2, the calculating of gas medial temperature is by computer generated image technology, and several two radiation images of picked-up, carry out calculation system according to the decay of Fire Radiation from different directions.
embodiment 5:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 2, conversion through application from from absolute temperature to Fahrenheit temperature, obtain the relational expression of a Qi Ti Wen Du ℉ and travel-time, propagation distance, gas componant, in TF=(d/Bt) 2 × 106-460 formulas: TF=Qi Ti Wen Du ℉ d=propagation distance ft, B=sound wave constant=sqrt[rR/M] the t=travel-time, (ms) equation below of application, temperature also can be by TC=(d/Bt) 2 × 106-273.16 d=propagation distance here of expressing Celsius.
embodiment 6:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 1, " (200.03mm), length 12.78 " (324.62mm) flange: be 3 according to ASTM standard " 150lb pipe flange weight: 11.8kg working temperature: flange-maximal value is 450 ℉ (232 DEG C) environment-maximal value 130 ℉ (54 DEG C) storage temperature: 15 ℉-150 ℉ (9 DEG C-65 DEG C) humidity: splashproof (non-waterproof) that receiver is Stainless steel 316 L alloy (also can order other material) size: diameter 7.88.
embodiment 7:
according to the assay method of the Sound wave measurement fire box temperature device described in embodiment 1, sonic generator utilizes the common compressed-air actuated inflatable sound source of factory, and sound source is used air pressure: 80-120psig (5.5-8.3Bar).

Claims (5)

1. a Sound wave measurement fire box temperature device, its composition comprises: receiver, it is characterized in that: described receiver communicates with instrument air, described receiver is connected with signal processor, described signal processor is connected with trigger, described trigger is connected with sonic generator, and described sonic generator is connected with air-source.
2. an assay method that utilizes the Sound wave measurement fire box temperature device described in claim 1, is characterized in that: the method comprises the following steps:
(1) velocity of sound that the ultimate principle of acoustic measurement fire box temperature is based upon in gas is according to the function of a temperature. change, and be further subject to along the impact of the gas ingredients of sound travel, opening relationships equation is:
c?=?d/t=sqrt[rRT/M]
In formula: r is the specific heat of gas, under normal pressure, the specific heat of gas is a constant, M gas molal weight Kg/mol, and R is gas law constant 8.314J/K-MOL, T absolute temperature Calvin;
(2) sonic generator is arranged on to one side of stove or boiler, receiver is arranged on to opposite side, an acoustic signals just can be transmitted device transceiver and survey, distance between forwarder and receiver is known fixing, and the measurement in the travel-time of acoustic signals allows to carry out the calculating of gas medial temperature according to the path between forwarder and receiver.
3. the assay method of Sound wave measurement fire box temperature device according to claim 2, is characterized in that: for the certain output of heating furnace, realize the reduction of fuel consumption by the space temperature condition that allows thermal radiation field approach even and balance.
4. the assay method of Sound wave measurement fire box temperature device according to claim 2, it is characterized in that: the calculating of gas medial temperature is by computer generated image technology, several two radiation images of picked-up, carry out calculation system according to the decay of Fire Radiation from different directions.
5. the assay method of Sound wave measurement fire box temperature device according to claim 2, it is characterized in that: the conversion through application from absolute temperature to Fahrenheit temperature, obtain a Qi Ti Wen Du ℉ and travel-time, propagation distance, the relational expression of gas componant, in TF=(d/Bt) 2 × 106-460 formulas: TF=Qi Ti Wen Du ℉ d=propagation distance ft, B=sound wave constant=sqrt[rR/M] the t=travel-time, (ms) application equation below, temperature also can be by TC=(d/Bt) 2 × 106-273.16 d=propagation distance here of expressing Celsius.
CN201410420675.1A 2014-08-25 2014-08-25 Device for measuring furnace hearth temperature through sound waves and measuring method Withdrawn CN104132749A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104881535A (en) * 2015-05-21 2015-09-02 东南大学 Improved thermal power plant boiler temperature field reconstruction temperature measuring algorithm
CN107389220A (en) * 2017-07-06 2017-11-24 中国船舶重工集团公司第七〇九研究所 The detection method of thermo parameters method in a kind of boiler
CN107917768A (en) * 2017-10-18 2018-04-17 华北电力大学 A kind of air themperature measuring device and method based on low-frequency sound wave
CN111123115A (en) * 2019-12-20 2020-05-08 上海纳米技术及应用国家工程研究中心有限公司 Battery module safety monitoring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104881535A (en) * 2015-05-21 2015-09-02 东南大学 Improved thermal power plant boiler temperature field reconstruction temperature measuring algorithm
CN107389220A (en) * 2017-07-06 2017-11-24 中国船舶重工集团公司第七〇九研究所 The detection method of thermo parameters method in a kind of boiler
CN107389220B (en) * 2017-07-06 2019-07-16 中国船舶重工集团公司第七一九研究所 The detection method of thermo parameters method in a kind of boiler
CN107917768A (en) * 2017-10-18 2018-04-17 华北电力大学 A kind of air themperature measuring device and method based on low-frequency sound wave
CN111123115A (en) * 2019-12-20 2020-05-08 上海纳米技术及应用国家工程研究中心有限公司 Battery module safety monitoring system

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Application publication date: 20141105