EP0845636A2 - A flame monitoring apparatus - Google Patents
A flame monitoring apparatus Download PDFInfo
- Publication number
- EP0845636A2 EP0845636A2 EP97120145A EP97120145A EP0845636A2 EP 0845636 A2 EP0845636 A2 EP 0845636A2 EP 97120145 A EP97120145 A EP 97120145A EP 97120145 A EP97120145 A EP 97120145A EP 0845636 A2 EP0845636 A2 EP 0845636A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat sink
- tube
- video camera
- support tube
- module
- 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.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
- F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
- F23M11/04—Means for supervising combustion, e.g. windows
- F23M11/045—Means for supervising combustion, e.g. windows by observing the flame
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2229/00—Flame sensors
- F23N2229/20—Camera viewing
Definitions
- the present invention relates to an optical flame monitoring apparatus housed in a lance.
- Previous flame monitor designs of the prior art produced only signals representative of presence and absence of the flame. More recent designs attempt to collect as much information as possible concerning the combustion itself so as to be able to affect the combustion towards a desired optimum. Such optimum may be seen in maximum efficiency or minimum air pollution or even other parameters.
- the present invention provides a flame monitoring apparatus capable to produce such supplemental information in real time.
- the apparatus comprises a lance adapted to be mounted on a furnace wall such that it is directed or aimed towards a flame.
- the lance houses a video camera and, in addition, light inlet ends of a plurality of light guide fibers. Light from the fibers may then be processed e.g. by means of a spectrum analyzer.
- the lance illustrated in Fig. 1 comprises adjacent its end facing the flame a circular cover plate or protective disk 10 which is designed as a part subject to wear. It may easily be separated from the remainder of the lance and replaced with a fresh one.
- Disk 10 has three light inlet openings: A central circular aperture 12 axially aligned with a tubus 14 of a video camera 16 plus two slots 18, 20. These slots extend from the circumference of the disk inwards, are parallel to one another and offset relative to aperture 12.
- Disk 10 is shown as circumferentially welded to a heat sink member 22. However, other fastening means could be provided so as to simplify its replacement.
- Heat sink member 22 is welded to an intermediate flange 24 which in turn is welded to a twin-walled heat sink tube comprising an inner tube 26 and an outer tube 28.
- the heat sink tube is supplied via a first fitting 30 with cooling liquid, preferably cooling water, drained via a second fitting 32.
- support tube 34 Within the inner tube 26 there is a support tube 34 through which the power and signal lines (not shown) of camera 16 extend. Further, support tube 34 houses the light guide fibers which are glass fibers.
- the other end of the support tube opposite to the flame is held by means of a flange 36 screw-connected to an end flange 38 of the heat sink tube and to a lid plate 40.
- the inner tube 26 extends beyond the end of the outer tube 28 and is provided with a fitting 42 permitting to inject pressurized air into the annular space between the inner tube 26 and the support tube 34. The air stream cleans the light transparent openings in disk 10 and contributes to cooling.
- the annular heat sink member 22 has two diametrically opposite notches 44, 46 aligned with the slots of disk 10, i.e. each slot and an associated notch have a common central plane. On its side facing away from disk 10 the heat sink member has two recesses 48 each extending from one notch defining wall 50 to that wall which defines the other notch.
- the heat sink member is welded to the intermediate flange 24.
- the latter forms a crown having two pairs of openings 52, 54 which when flange 24 is connected to the heat sink member 22 open into the recesses 48 laterally with respect to one of the notches 44, 46.
- the intermediate flange is welded with its side opposite the heat sink member to inner tube 26 and outer tube 28.
- the annular space between inner tube and outer tube is divided by two separating walls 56 extending parallel to the axis so as to form two halves one of which communicating with the inflow fitting 30 while the other communicates with the drain fitting 32.
- Inflowing cooling water flows through one of the halves of the annular space to the intermediate flange and through openings 52 into the recesses 48 and from there through the associated opening 54 into the other half of the annular space.
- No sealing is provided between intermediate flange 24 and the end edges of separating walls 56 as a small leakage at this site is tolerable.
- a light guide holder 60 is fastened, preferably clamped on the tubus 14 of video camera 16; in Fig. 2 holder 60 is shown axially offset for sake of clarity.
- Holder 60 comprises clamp body 62 and two light guide carriers 62, 64 mounted thereon e.g. by means of screws.
- Each light guide carrier is L-shaped and provided with throughbores 68 each receiving a light guide, for example a glass fiber which is held preferably by clamp means, not shown.
- the light inlet ends of the light guides are disposed such that their axes extend in the central plane of notches 44, 46 and the axes are directed such that the light guides cover a large angle of preferably 90° but at least 75°. If each light guide has an aperture angle of, say, 20° five ore four light guides, respectively, will be necessary.
- Fig. 4 illustrates such a light guide carrier in partial section view.
- Fig. 3 shows the video camera 16 and its tubus 14 and socket 70, the latter being held in a camera mount 72.
- the latter is tripod shaped, the legs thereof being in heat-conducting abutment on the inner tube 26 of the heat sink tube.
- the light guides extend through the interstices between the legs.
- Each leg of the mount is connected, by means of a bolt 74, to support tripod 76 which has in its center a through-hole provided with nut screw threads 78 for connecting it to the end of the support tube.
- the support tripod 76 too, is in heat conducting abutment with inner tube 26 of the heat sink tube.
- the light guides extend from their carriers into the support tube. At its end facing away from the flame the support tube has a branch 80 through which the light guides extend e.g. to spectroscopes while the camera cable extends through the support tube itself.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Studio Devices (AREA)
- Control Of Combustion (AREA)
Abstract
Description
- Fig. 1
- is an axial section view of the lance,
- Fig. 2
- is a partially sectioned isometric explosion view of an end of the lance,
- Fig. 3
- illustrates support means of the optical parts in a manner similar to Fig. 2, and
- Fig. 4
- illustrates a partially sectioned plan view of a light fiber carrier.
Claims (18)
- An apparatus for optically monitoring a flame, comprising:a lance having a first end and a second end, said first end being adapted to be mounted on a furnace wall,a support module disposed in said lance adjacent said first lance end,a video camera supported by said module and directed towards a flame in a furnace,light guide fibers having light inlet ends, said light inlet ends being mounted in said module and directed towards flame surroundings.
- The apparatus of claim 1, further comprising a support tube, said module being fixed to said support tube, a video camera cable extending through said support tube, and said light guide fibers extending through said support tube.
- The apparatus of claim 1, further comprising a heat sink member housing said module.
- The apparatus of claim 3, further comprising a twin-walled heat sink tube, said heat sink member being disposed adjacent an end of said heat sink tube, and cooling liquid flowing through said heat sink tube.
- The apparatus of claim 4, further comprising at least two separating walls extending between an inner wall and an outer wall of said heat sink tube thereby defining an inflow string and a drain string.
- The apparatus of claim 5 wherein said heat sink member has at least one recess, each recess connecting an inflow string to a drain string.
- The apparatus of claim 3, further comprising a protective disk mounted on said heat sink member.
- The apparatus of claim 3 wherein said heat sink member has notches through which light may impinge on said light inlet ends.
- The apparatus of 8, further comprising a protective disk mounted on said heat sink member and having slots aligned with said heat sink member notches.
- The apparatus of claim 1 wherein said video camera has a tubus and said module comprises:a video camera mount,a support block mounted on said video camera tubus,at least one light guide fiber carrier fixed to said support block and having bores receiving individual light guide fibers.
- The apparatus of claim 10 wherein said bores are disposed in a common plane but angularly offset to one another.
- The apparatus of claim 11, further comprising a heat sink member surrounding said module and having notches, a protective disk mounted on said heat sink member and having slots aligned with said notches, and said bores having axes extending in a common central plane of said slots and notches.
- The apparatus of claim 10 wherein said video camera mount defines openings, and said light guide fibers extending through said openings.
- The apparatus of claim 13 wherein said video camera mount is tripod shaped.
- The apparatus of claim 13, further comprising a support tube, a tripod member screwed to said support tube, and bolts connecting said video camera mount to said tripod member.
- The apparatus of claim 15 wherein said support tube is centered within a heat sink tube by means of said tripod member.
- The apparatus of claim 16 wherein said support tube and said heat sink tube define an annular space adapted to be supplied with pressurized air.
- The apparatus of claim 11 comprising two fiber carriers, the bores of said fiber carriers commonly defining a sight angle of at least 150°, preferably 165°, and more preferably 180°.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19649264A DE19649264A1 (en) | 1996-11-28 | 1996-11-28 | Flame observation device |
DE19649264 | 1996-11-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0845636A2 true EP0845636A2 (en) | 1998-06-03 |
EP0845636A3 EP0845636A3 (en) | 1999-07-07 |
Family
ID=7812987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97120145A Ceased EP0845636A3 (en) | 1996-11-28 | 1997-11-18 | A flame monitoring apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0845636A3 (en) |
CN (1) | CN1186195A (en) |
CA (1) | CA2221328A1 (en) |
DE (1) | DE19649264A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2378239A (en) * | 2001-05-14 | 2003-02-05 | Pia Procede Ind Automatise Inc | Detecting the presence of a burner flame |
EP1621813A1 (en) * | 2004-07-27 | 2006-02-01 | Powitec Intelligent Technologies GmbH | Observation apparatus with push-through device |
WO2008034266A1 (en) * | 2006-09-19 | 2008-03-27 | Abb Research Ltd | Flame detector for monitoring a flame during a combustion process |
CN101839652B (en) * | 2009-03-17 | 2011-12-28 | 中国钢铁股份有限公司 | Double monitoring device for working furnace |
JP2015169365A (en) * | 2014-03-06 | 2015-09-28 | 日本電気硝子株式会社 | In-furnace monitoring device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1156149C (en) | 2002-06-25 | 2004-06-30 | 北京科技大学 | Plug-in kiln video camera and its image processing method |
KR101396036B1 (en) * | 2009-12-30 | 2014-05-16 | 창젱 엔지니어링 씨오., 엘티디. | A flame detection device |
CN103343979A (en) * | 2013-06-25 | 2013-10-09 | 合肥金星机电科技发展有限公司 | High-temperature probe cooling device |
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 |
CN104406190A (en) * | 2014-11-21 | 2015-03-11 | 张家港格林沙洲锅炉有限公司 | Observation device used on fire observation opening of furnace hearth |
CN109540288B (en) * | 2018-12-04 | 2024-04-09 | 北京建筑材料科学研究总院有限公司 | Flame observation device of rotary kiln |
CN109654529B (en) * | 2018-12-26 | 2020-04-21 | 国网河北省电力有限公司电力科学研究院 | Furnace chamber combustion observation instrument |
CN109905673A (en) * | 2019-03-08 | 2019-06-18 | 江苏能建机电实业集团有限公司 | The cooling device of thermal-flame monitoring probe |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150269B (en) * | 1983-11-25 | 1986-10-15 | Tolltreck Limited | Metallurgical lance with flame detector |
JPS60263013A (en) * | 1984-06-07 | 1985-12-26 | Babcock Hitachi Kk | Flame detector |
JPS61218737A (en) * | 1985-03-23 | 1986-09-29 | Kawasaki Heavy Ind Ltd | Combustion photographing apparatus for internal-combustion engine |
JPH0650177B2 (en) * | 1986-04-09 | 1994-06-29 | 株式会社日立製作所 | Multi-burner combustion condition monitoring method |
DD261290A3 (en) * | 1986-11-11 | 1988-10-26 | Freiberg Brennstoffinst | COMBINED FUTURE AND MONITORING DEVICE FOR BURNERS |
DE9111701U1 (en) * | 1991-09-19 | 1991-12-05 | Marai Mechanik Und Elektronik Gmbh, 3015 Wennigsen, De | |
DE4332044A1 (en) * | 1993-09-21 | 1995-03-23 | Klaus Hallmann | Furnace probe camera with technoscope |
DE19615141A1 (en) * | 1996-04-17 | 1997-10-23 | Bfi Automation Gmbh | Method and device for controlling a combustion process in a boiler |
-
1996
- 1996-11-28 DE DE19649264A patent/DE19649264A1/en not_active Withdrawn
-
1997
- 1997-11-17 CA CA002221328A patent/CA2221328A1/en not_active Abandoned
- 1997-11-18 EP EP97120145A patent/EP0845636A3/en not_active Ceased
- 1997-11-18 CN CN97123106A patent/CN1186195A/en active Pending
Non-Patent Citations (1)
Title |
---|
None |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2378239A (en) * | 2001-05-14 | 2003-02-05 | Pia Procede Ind Automatise Inc | Detecting the presence of a burner flame |
GB2378239B (en) * | 2001-05-14 | 2005-03-16 | Pia Procede Ind Automatise Inc | Apparatus and method for detecting the presence of a burner flame |
EP1621813A1 (en) * | 2004-07-27 | 2006-02-01 | Powitec Intelligent Technologies GmbH | Observation apparatus with push-through device |
US7520744B2 (en) | 2004-07-27 | 2009-04-21 | Powtec Intelligent Technologies Gmbh | Monitoring device with scraper unit |
WO2008034266A1 (en) * | 2006-09-19 | 2008-03-27 | Abb Research Ltd | Flame detector for monitoring a flame during a combustion process |
CN101512227B (en) * | 2006-09-19 | 2011-11-16 | Abb研究有限公司 | Flame detector for monitoring flame during combustion process |
US8274560B2 (en) | 2006-09-19 | 2012-09-25 | Abb Research Ltd | Flame detector for monitoring a flame during a combustion process |
CN101839652B (en) * | 2009-03-17 | 2011-12-28 | 中国钢铁股份有限公司 | Double monitoring device for working furnace |
JP2015169365A (en) * | 2014-03-06 | 2015-09-28 | 日本電気硝子株式会社 | In-furnace monitoring device |
Also Published As
Publication number | Publication date |
---|---|
EP0845636A3 (en) | 1999-07-07 |
CN1186195A (en) | 1998-07-01 |
DE19649264A1 (en) | 1998-06-10 |
CA2221328A1 (en) | 1998-05-28 |
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