CN109540288B - Flame observation device of rotary kiln - Google Patents
Flame observation device of rotary kiln Download PDFInfo
- Publication number
- CN109540288B CN109540288B CN201811473131.6A CN201811473131A CN109540288B CN 109540288 B CN109540288 B CN 109540288B CN 201811473131 A CN201811473131 A CN 201811473131A CN 109540288 B CN109540288 B CN 109540288B
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- Prior art keywords
- flame
- rotary kiln
- burner
- camera
- pore canal
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- 239000011148 porous material Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims 2
- 230000004313 glare Effects 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Radiation Pyrometers (AREA)
Abstract
The invention provides a flame observing device of a rotary kiln, which comprises: the device comprises a first flame camera device and a second flame camera device, wherein the first flame camera device is arranged in a rotary kiln door, a burner is arranged on the rotary kiln door, the second flame camera device is arranged in a pore canal arranged in the burner, the pore canal is axially arranged by the end part of the burner, and the pore canal is communicated with an injection air channel or a rotary air channel in the burner. According to the rotary kiln flame observation device, the first flame photographing device is arranged on the outer side of the burner, and the second flame photographing device is additionally arranged on the burner, so that comprehensive observation of the characteristics of the outer part and the inner part of the flame is achieved, meanwhile, the colorimetric pyrometer is additionally arranged, the temperature gradient of the flame is observed to form three-dimensional display of the flame, the flame can be observed and evaluated in an omnibearing manner, the combustion efficiency of fuel is better optimized, and the device is environment-friendly and special limited, is completely suitable for industrial production occasions, and is safe and reliable to use.
Description
Technical Field
The invention relates to the technical field of flame observation, in particular to a flame observation device of a rotary kiln.
Background
The burner at the end of the rotary kiln is an essential and important device for the cement industry. The high temperature flame close to 2000 ℃ is generated by the burner, the combustion effect of the flame is directly related to the combustion efficiency of the fuel, the quality and the yield of the calcined material of the rotary kiln, and the consumption of the fuel and the pollution emission to the atmosphere. Therefore, the flame combustion condition is reliably observed in real time, and relevant adjustment is very important according to the flame, so that the method has important guiding significance for energy conservation, emission reduction, quality improvement and synergy.
At present, a rotary kiln head is widely used to be provided with a high-temperature-resistant television camera, and the appearance shape of flame is transmitted to a control center through a cable. From the position where the camera is installed and the shape of the flame displayed, only the external shape of the flame and the combustion condition are displayed, and the combustion condition inside the flame cannot be observed.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a flame observing device of a rotary kiln, which aims to solve the problem that the existing flame observing device cannot observe the external and internal combustion conditions of flame at the same time.
(II) technical scheme
In order to solve the technical problem, the invention provides a rotary kiln flame observation device, which comprises a first flame shooting device, wherein the first flame shooting device is arranged in a rotary kiln door, a burner is arranged on the rotary kiln door, and the end part of the burner is positioned in the rotary kiln door, and the rotary kiln flame observation device further comprises: the second flame camera device is arranged in a pore canal formed in the combustor, the pore canal is formed by the end part of the combustor along the axial direction, and the pore canal is communicated with an injection air channel or a rotary air channel in the combustor.
Preferably, the burner comprises a plurality of layers of sleeves, the pore canal is arranged in the sleeve adjacent to the jet air duct or the cyclone air duct, an air inlet is arranged on the sleeve between the jet air duct or the cyclone air duct and the pore canal, and the second flame camera device is positioned between the air inlet and the end part of the burner.
Preferably, the air inlet is located at an end of the duct remote from the end of the burner.
Preferably, the radiation temperature measuring device is further arranged in the pore canal.
Preferably, a bracket is arranged in the duct, and the second flame camera device and the radiation temperature measuring device are fixedly arranged on the bracket.
Preferably, the bracket comprises: the support rings are fixedly connected with the inner walls of the pore channels, the support bars are arranged along the radial direction of the support rings and form nodes at the circle center of the support rings, and the second flame photographing device and the radiation temperature measuring device are fixed at the positions of the nodes.
Preferably, the radiation temperature measuring device is a colorimetric pyrometer.
Preferably, the first flame camera device adopts a high-temperature optical camera or a strong light suppression camera, and the second flame camera device adopts a strong light suppression camera.
(III) beneficial effects
According to the rotary kiln flame observation device provided by the invention, on the basis of installing the first flame photographing device at the outer side of the existing burner, the duct is formed in the sleeve of the burner, and the second flame photographing device is arranged in the duct, so that the comprehensive observation of the combustion characteristics of the outer part and the inner part of the flame is realized, and the combustion efficiency of fuel is better optimized.
In addition, a radiation temperature measuring device is added in the pore canal, the temperature gradient of the flame is observed to form a three-dimensional display of the flame, the flame can be observed and evaluated in an omnibearing manner, the combustion efficiency of the fuel is further optimized, and the device has no environmental protection and special limitation, is completely suitable for industrial production occasions and is safe and reliable to use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the installation position of a flame observing device of a rotary kiln according to an embodiment of the invention;
FIG. 2 is a schematic view of the structure of the combustor according to the embodiment of the present invention;
FIG. 3 is a cross-sectional view of a bracket and tunnel mounting in accordance with an embodiment of the present invention;
in the figure:
1-a first flame camera device; 2-a second flame camera device; 3-a rotary kiln door; 4-a rotary kiln; a 5-burner; 6-pore canal; 7-spraying air duct; 8-rotating the air duct; 9-a sleeve; 10-an air inlet; 11-radiation temperature measuring device; 12-a bracket; 13-a support ring; 14-supporting bars.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 3, an embodiment of the present invention provides a flame observing apparatus for a rotary kiln, including: the first flame camera device 1 and the second flame camera device 2, the first flame camera device 1 is installed in the rotary kiln door 3 for observe the outside combustion condition of flame, rotary kiln door 3 plays sealed effect for rotary kiln 4, and current combustor 5 is generally installed in the central point of rotary kiln door 3, and the tip of combustor 5 is located rotary kiln door 3, and the flame is through the tip blowout of combustor 5 and burns the material in the rotary kiln 4. The first flame camera device 1 has a relatively high mounting position selectivity, and only needs to use a common high-temperature optical camera, and can also use a strong light inhibition camera, so that the effect is better.
The burner 5 generally comprises a multi-layered steel sleeve 9 separating the high pressure air from the pulverized coal feed air, and is at a high temperature of up to approximately 2000 c 0.5 m and more beyond the end of the burner 5, but inside the burner 5, the inside of the burner 5 is maintained at a normal temperature of several tens of c because of the high pressure and high speed jet air and the rotating air. Wherein, the jet wind is introduced into the end part of the burner 5 through the jet wind channel 7, and the rotary wind is introduced into the end part of the burner 5 through the rotary wind channel 8.
In order to observe the combustion condition inside the flame, in the embodiment of the present invention, the second flame camera device 2 is installed in a duct 6 formed in the burner 5 and aligned to the flame inside, the duct 6 is formed by the end of the burner 5 along the axial direction of the burner 5 inwards, and the duct 6 is communicated with an injection duct 7 inside the burner 5 or is communicated with a rotating duct 8. The second flame camera device 2 in the duct 6 is cooled by the jet air duct 7 or the rotary air duct 8 so as to ensure the normal operation of the second flame camera device 2. The figure illustrates the communication between the duct 6 and the jet air duct 7. The second flame camera device 2 adopts strong light to restrain the camera, and is small in size and convenient to install.
On the basis of the above embodiment, in particular, since the burner 5 comprises a plurality of layers of steel sleeves 9, the duct 6 is specifically opened in the sleeves 9, and the sleeve 9 in which the duct 6 is positioned is disposed adjacent to the jet air duct 7 or the cyclone air duct 8. An air inlet 10 is arranged on the sleeve 9 between the jet air duct 7 or the cyclone air duct 8 and the duct 6, and the second flame camera device 2 is positioned between the air inlet 10 and the end part of the burner 5 so as to ensure that the flame enters from the air inlet 10.
On the basis of the above embodiments, the air inlet 10 is located at one end of the duct 6 far away from the end of the burner 5, so as to ensure that a cooling air inlet channel with enough length is provided in the duct 6, and fully cool the second flame camera device 2.
On the basis of the above embodiments, in order to test the distribution of flame temperature so as to evaluate and improve the flame combustion deeply, the flame observation device of the rotary kiln provided by the embodiment of the invention further comprises a radiation temperature measuring device 11, wherein the radiation temperature measuring device 11 is used for measuring the temperature distribution of high-temperature flame, and the radiation temperature measuring device 11 is also installed in the duct 6 where the second flame photographing device 2 is located; of course, a hole may be formed in addition, and only the hole needs to be ensured to be communicated with one of the jet air duct 7 or the cyclone air duct 8, so that the radiation temperature measuring device 11 and the second flame camera device 2 are separately installed.
In the above embodiments, the signals collected by the radiation temperature measuring device 11 and the second flame camera device 2 in the duct 6 are all transmitted to the outside through cables or optical cables.
On the basis of the above embodiments, in order to better achieve the fixation of the second flame camera device 2 and the radiation temperature measuring device 11, a good ventilation cooling effect is ensured. In the embodiment of the invention, a bracket 12 is arranged in the pore canal 6, and the second flame camera device 2 and the radiation temperature measuring device 11 are fixedly arranged on the bracket 12.
To further enhance the ventilation cooling effect, the bracket 12 specifically includes: the support ring 13 and the support bars 14 are fixedly connected with the inner wall of the duct 6, and the support ring 13 and the inner wall of the duct 6 can be in interference fit, so long as the disturbance of high-pressure high-speed jet wind or rotary wind can be satisfied. The supporting strips 13 are arranged along the radial direction of the supporting ring 14, and are converged at the center of the supporting ring 13 to form a node, the second flame camera device 2 and the radiation temperature measuring device 11 are fixed at the node position, and jet wind or rotary wind passes through gaps between the supporting strips, so that the second flame camera device 2 and the radiation temperature measuring device 11 are cooled.
Based on the above embodiments, the radiation temperature measuring device 11 in the embodiments of the present invention may specifically be a colorimetric pyrometer, which is one type of radiation pyrometer, and is manufactured according to the principle that the ratio of radiation intensities at two wavelengths in radiation emitted by a heated object changes with the actual temperature of the object. The temperature of the heated object can be known by measuring the ratio of the radiation intensities at the two wavelengths. Compared with an optical pyrometer, the colorimetric pyrometer measures the temperature of a real object, and the measurement result is more accurate without correction.
According to the rotary kiln flame observation device provided by the embodiment of the invention, holes are drilled at any suitable position on the circumference of the steel sleeve pipe adjacent to the jet wind or the rotary wind on the end face of the burner, a pore canal is drilled along the axial direction of the burner and communicated with the high-pressure wind for cooling, a circular ring bracket is arranged, strong light inhibition cameras and a colorimetric pyrometer inside and outside the burner are fixed on the bracket, the internal combustion condition of the flame can be directly observed, meanwhile, the temperature distribution condition of the flame is tested, the temperature distribution of the flame can be corresponding to the shape of the flame, and three-dimensional temperature reproduction display and temperature description are formed at a display terminal.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model provides a rotary kiln flame observation device, includes first flame camera device, first flame camera device installs in the rotary kiln door, install the combustor on the rotary kiln door, the tip of combustor is located in the rotary kiln door, its characterized in that still includes: the second flame camera device is arranged in a pore canal formed in the combustor, the pore canal is formed by the end part of the combustor along the axial direction, and the pore canal is communicated with an injection air channel or a rotary air channel in the combustor.
2. The rotary kiln flame observing device according to claim 1, wherein the burner comprises a plurality of layers of sleeves, the pore canal is arranged in the sleeve adjacent to the jet air duct or the cyclone air duct, an air inlet is arranged on the sleeve between the jet air duct or the cyclone air duct and the pore canal, and the second flame camera device is positioned between the air inlet and the end part of the burner.
3. The rotary kiln flame viewing device of claim 2, wherein the air inlet is located at an end of the duct remote from the end of the burner.
4. The rotary kiln flame viewing device of claim 2, further comprising a radiation temperature measurement device mounted within the tunnel.
5. The rotary kiln flame observing device according to claim 4, wherein a bracket is arranged in the pore canal, and the second flame photographing device and the radiation temperature measuring device are fixedly arranged on the bracket.
6. The rotary kiln flame observing apparatus of claim 5, wherein the bracket comprises: the support rings are fixedly connected with the inner walls of the pore channels, the support bars are arranged along the radial direction of the support rings and form nodes at the circle center of the support rings, and the second flame photographing device and the radiation temperature measuring device are fixed at the positions of the nodes.
7. The rotary kiln flame viewing device of any of claims 4 to 6, wherein the radiation temperature measurement device is a colorimetric pyrometer.
8. The rotary kiln flame viewing device of any of claims 1 to 6, wherein the first flame camera device employs a high temperature optical camera or a glare suppression camera, and the second flame camera devices each employ a glare suppression camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473131.6A CN109540288B (en) | 2018-12-04 | 2018-12-04 | Flame observation device of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811473131.6A CN109540288B (en) | 2018-12-04 | 2018-12-04 | Flame observation device of rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109540288A CN109540288A (en) | 2019-03-29 |
| CN109540288B true CN109540288B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811473131.6A Active CN109540288B (en) | 2018-12-04 | 2018-12-04 | Flame observation device of rotary kiln |
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| Country | Link |
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| CN (1) | CN109540288B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114353952B (en) * | 2021-12-04 | 2023-10-20 | 河南鼎力电气科技有限公司 | Ring main unit cable head temperature measuring device and monitoring method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1429093A (en) * | 1965-04-05 | 1966-02-18 | Babcock & Wilcox Co | Flame detector |
| CN1186195A (en) * | 1996-11-28 | 1998-07-01 | Bfi明德曼自动化有限责任公司 | Flame monitoring apparatus |
| US6142665A (en) * | 1996-07-18 | 2000-11-07 | Abb Alstom Power Ltd | Temperature sensor arrangement in combination with a gas turbine combustion chamber |
| CN201582844U (en) * | 2009-10-14 | 2010-09-15 | 上海涌能能源科技发展有限公司 | Cooling purger for flame monitoring device of boiler burner |
| KR20120002312A (en) * | 2010-06-30 | 2012-01-05 | 한국전력공사 | Burner monitoring system |
| CN103982909A (en) * | 2014-05-23 | 2014-08-13 | 新兴铸管股份有限公司 | Monitoring device for flames inside heating furnace |
| CN206310539U (en) * | 2016-11-16 | 2017-07-07 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of flame monitoring apparatus of combustion chamber |
| CN207162590U (en) * | 2017-08-31 | 2018-03-30 | 江苏凯弘新能源管理有限公司 | Boiler flame monitoring device |
| CN209432284U (en) * | 2018-12-04 | 2019-09-24 | 北京建筑材料科学研究总院有限公司 | A kind of rotary kiln flame observation device |
-
2018
- 2018-12-04 CN CN201811473131.6A patent/CN109540288B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1429093A (en) * | 1965-04-05 | 1966-02-18 | Babcock & Wilcox Co | Flame detector |
| US6142665A (en) * | 1996-07-18 | 2000-11-07 | Abb Alstom Power Ltd | Temperature sensor arrangement in combination with a gas turbine combustion chamber |
| CN1186195A (en) * | 1996-11-28 | 1998-07-01 | Bfi明德曼自动化有限责任公司 | Flame monitoring apparatus |
| CN201582844U (en) * | 2009-10-14 | 2010-09-15 | 上海涌能能源科技发展有限公司 | Cooling purger for flame monitoring device of boiler burner |
| KR20120002312A (en) * | 2010-06-30 | 2012-01-05 | 한국전력공사 | Burner monitoring system |
| CN103982909A (en) * | 2014-05-23 | 2014-08-13 | 新兴铸管股份有限公司 | Monitoring device for flames inside heating furnace |
| CN206310539U (en) * | 2016-11-16 | 2017-07-07 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of flame monitoring apparatus of combustion chamber |
| CN207162590U (en) * | 2017-08-31 | 2018-03-30 | 江苏凯弘新能源管理有限公司 | Boiler flame monitoring device |
| CN209432284U (en) * | 2018-12-04 | 2019-09-24 | 北京建筑材料科学研究总院有限公司 | A kind of rotary kiln flame observation device |
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| CN109540288A (en) | 2019-03-29 |
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