CN112228870B - Flameless burner for forming neutral borosilicate glass tube - Google Patents
Flameless burner for forming neutral borosilicate glass tube Download PDFInfo
- Publication number
- CN112228870B CN112228870B CN202011126675.2A CN202011126675A CN112228870B CN 112228870 B CN112228870 B CN 112228870B CN 202011126675 A CN202011126675 A CN 202011126675A CN 112228870 B CN112228870 B CN 112228870B
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- CN
- China
- Prior art keywords
- burner
- combustion chamber
- pipe
- combustion
- borosilicate glass
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
Abstract
The invention discloses a flameless burner for forming a neutral borosilicate glass tube, which comprises: a combustion chamber; the premixer is injected with mixed gas for combustion; the upper ends of the connecting pipes are connected with the lower end of the premixer; the lower ends of the connecting pipes are connected with the upper end of a connecting elbow, and the lower ends of the connecting elbows are arranged towards one side of the combustion chamber in a bending way; the combustor main part, the combustor main part all is cylindrical structure, and the one end of combustor main part all is connected with the lower extreme of connecting the elbow, and the other end of combustor main part all installs in one side of combustion chamber with inserting. By applying the burner block, gas and air are mixed in advance, the mixed gas enters the combustion chamber through the burner main body, the combustion speed of the sprayed mixed gas is extremely high, the combustion process can be finished in the burner block, the flame is short, and the combustion pulsation is eliminated; the resistance loss is small during working, the adjusting range is large, and the temperature distribution is uniform and stable.
Description
Technical Field
The invention relates to the technical field of glass tube forming, in particular to a flameless burner for forming a neutral borosilicate glass tube.
Background
At present, in China, in the process of forming production of a neutral borosilicate glass tube, a muffle furnace is generally used for heating the rotary tube, specifically, a low-pressure spray gun burner is often used in a limited space to transfer heat to glass liquid on the rotary tube, so that the glass liquid flows downwards on the rotary tube and forms temperature gradient, and then the glass liquid is separated from the rotary tube and is formed by free falling bodies to prepare a hollow or solid glass tube. The heating mode has great influence on the uniformity of the glass liquid due to the uneven spatial temperature distribution of the flame of the burner and poor thermal stability,
disclosure of Invention
In view of the above, in order to solve the above problems, the present invention provides a flameless burner for forming a neutral borosilicate glass tube, comprising:
the glass forming device comprises a combustion chamber, a rotary pipe and a forming device, wherein the combustion chamber is internally provided with the rotary pipe, and molten glass to be formed flows upwards the rotary pipe;
the premixer is arranged on one side of the combustion chamber and is of a cylindrical tank structure, the axis of the premixer is arranged along the horizontal direction, and mixed gas for combustion is injected into the premixer;
the upper end of each connecting pipe is connected with the lower end of the premixer;
the lower end of each connecting pipe is connected with the upper end of one connecting elbow, and the lower end of each connecting elbow is bent towards one side of the combustion chamber;
the combustor comprises a plurality of combustor main bodies, each combustor main body is of a cylindrical structure, one end of each combustor main body is connected with the lower end of a connecting elbow, the other end of each combustor main body is installed on the combustion chamber in an inserted mode, the other end of each combustor main body is communicated with the inside of the combustion chamber, and a certain distance is reserved between the other end of each combustor main body and the inner wall of the combustion chamber.
In another preferred embodiment, the burner body comprises: the material spraying pipe is of a hollow pipe body structure, a cavity is formed inside the material spraying pipe, one end of the material spraying pipe is fixedly connected with the lower end of the connecting elbow, the lower end of the connecting elbow is connected with one end of the material spraying pipe, and the other end of the material spraying pipe is connected with the material spraying head.
In another preferred embodiment, the injector head is a conical structure protruding towards the interior of the combustion chamber.
In another preferred embodiment, the material spraying head is uniformly provided with a plurality of spraying holes, and the central line of at least one spraying hole is coincided with the central line of the material spraying pipe.
In another preferred embodiment, the centerline of each of the orifices is perpendicular to the outer surface of the jet head.
In another preferred embodiment, the material spraying head is provided with nine spraying holes, and the diameter of each spraying hole is 1.5 mm-3 mm.
In another preferred embodiment, the combustion chamber comprises: frame main part and burner block, the frame main part is hollow structure, install in the frame main part the swivelling duct, the burner block inlays to be located in the frame main part, spout the material pipe install with inserting in the burner block, a mounting hole and a diffusion hole have been seted up on the burner block, the mounting hole is the setting of circular hole shape and is in the outside of burner block forms an installation passageway, the diffusion hole is seted up in the other end of mounting hole forms a combustion path in the inboard of burner block, combustion path with the coaxial setting of installation passageway, spout the material pipe install in the installation passageway, spout the stub bar orientation the combustion path sets up.
In another preferred embodiment, the diameter of one end of the combustion channel close to the inner side of the burner block is larger than that of one end of the combustion channel close to the outer side of the burner block, and the combustion channel is arranged in a funnel shape.
In another preferred embodiment, the taper of the combustion passage is between 30 ° and 60 °.
In another preferred embodiment, the method further comprises: and each sealing ring is sleeved at one end of the material spraying pipe, and one side of each sealing ring is fixedly arranged on the outer side of the burner block.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects: through the application of the invention, the gas and the air are fully mixed in advance before entering the combustion chamber, meanwhile, the temperature in the combustion chamber is kept far higher than the spontaneous combustion temperature of the gas, the mixed gas enters the combustion chamber through the burner body, the combustion speed of the sprayed mixed gas is extremely high, the whole combustion process can be finished in the burner block, the flame is very short, even the flame cannot be seen, and the combustion pulsation is eliminated; the flameless combustor has the advantages of small resistance loss during working, large adjusting range and uniform temperature distribution, and the flameless combustor can form a temperature gradient of 300 ℃ in a combustion chamber and keep stable by adjusting the installation position.
Drawings
FIG. 1 is a schematic view of a flameless burner for forming a neutral borosilicate glass tube according to the present invention;
FIG. 2 is an installation view of a flameless burner for forming a neutral borosilicate glass tube according to the present invention;
FIG. 3 is a partial cross-sectional view of a flameless burner for forming a neutral borosilicate glass tube in accordance with the present invention.
In the drawings:
1. a combustion chamber; 2. a premixer; 3. a connecting pipe; 4. connecting an elbow; 5. a burner body; 51. a material spraying head; 52. a material spraying pipe; 521. a cavity; 511. spraying a hole; 11. a frame body; 12. a burner block; 13. mounting holes; 14. a diffusion hole; 15. and (5) sealing rings.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1 to 3, there is shown a flameless burner for forming a neutral borosilicate glass tube according to a preferred embodiment, comprising: the glass forming device comprises a combustion chamber 1, wherein a rotating pipe is installed in the combustion chamber 1, and molten glass to be formed flows upwards from the rotating pipe; the premixer 2 is arranged on one side of the combustion chamber 1, the premixer 2 is of a cylindrical tank structure, the axis of the premixer 2 is arranged along the horizontal direction, and mixed gas for combustion is injected into the premixer 2; the upper end of each connecting pipe 3 is connected with the lower end of the premixer 2; the lower end of each connecting pipe 3 is connected with the upper end of one connecting elbow 4, and the lower end of each connecting elbow 4 is bent towards one side of the combustion chamber 1; a plurality of combustor main parts 5, each combustor main part 5 all is cylindrical structure, each the one end of combustor main part 5 all with the lower extreme of connecting elbow 4 is connected, each the other end of combustor main part 5 all install with inserting on the combustion chamber 1, each the other end of combustor main part 5 all with the inside intercommunication of combustion chamber 1, and each the other end of combustor main part 5 all with leave certain distance between the inner wall of combustion chamber 1. Further, the mixed gas is preferably a mixture of natural gas and air, the natural gas and the air are sufficiently mixed by the premixer 2, the temperature in the combustion chamber 1 is kept far higher than the self-ignition temperature of the natural gas, rapid combustion is started at the moment when the mixed gas enters the combustion chamber 1 through the burner body 5, the whole combustion process is completed on the path between the other end of the burner body 5 and the inner wall of the combustion chamber 1, the flame is short, and the flame cannot be seen even in the actual use process; the upper part of the combustion chamber 1 should be provided with a molten glass supply channel which is arranged opposite to the rotary pipe and supplies the required molten glass to be formed, and the rotary pipe is driven by an external motor to rotate so that the molten glass is uniformly formed on the rotary pipe to form a glass pipe, and the glass pipe is preferably a borosilicate glass pipe for neutral glass.
Further, as a preferred embodiment, the burner body 5 includes: the material spraying device comprises a material spraying head 51 and a material spraying pipe 52, wherein the material spraying pipe 52 is of a hollow pipe body structure, a cavity 521 is formed inside the material spraying pipe 52, one end of the material spraying pipe 52 is fixedly connected with the lower end of the connecting elbow 4, the lower end of the connecting elbow 4 is connected with one end of the material spraying pipe 52, and the other end of the material spraying pipe 52 is connected with the material spraying head 51. Further, the cavity 521 forms a circular cross-section channel for the mixed gas to enter the combustion chamber 1, so that the mixed gas is further uniformly mixed in the cavity 521 and is preheated to a certain extent by the temperature of the combustion chamber 1, and combustion can be started immediately when the material spraying head 51 sprays out.
Further, as a preferred embodiment, the injector head 51 has a conical structure protruding toward the inside of the combustion chamber 1. Furthermore, the end of the material spraying head 51 facing the combustion chamber 1 is diffused more uniformly when spraying the mixed gas, so that the combustion pulsation is greatly eliminated; preferably, the nozzle 51 may also have a hemispherical surface structure.
Further, as a preferred embodiment, the material spraying head 51 is uniformly provided with a plurality of spraying holes 511, and a center line of at least one spraying hole 511 coincides with a center line of the material spraying pipe 52.
Further, as a preferred embodiment, the center line of each of the injection holes 511 is perpendicular to the outer surface of the material injection head 51.
Further, as a preferred embodiment, the material spraying head 51 is provided with nine spraying holes 511, and the diameter of each spraying hole 511 is 1.5mm to 3mm.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope and the implementation manner of the present invention.
The present invention also has the following embodiments in addition to the above:
in a further embodiment of the invention, said combustion chamber 1 comprises: frame main part 11 and burner block 12, frame main part 11 is hollow structure, install in frame main part 11 the rotatory pipe, burner block 12 inlays to be located on frame main part 11, spout material pipe 52 install insertingly in burner block 12, a mounting hole 13 and a diffusion hole 14 have been seted up on burner block 12, mounting hole 13 is the setting of round hole shape and is in the outside of burner block 12 forms an installation passageway, diffusion hole 14 sets up in the other end of mounting hole 13 forms a burning passageway in burner block 12's inboard, burning passageway with the coaxial setting of installation passageway, spout material pipe 52 install in the installation passageway, spout stub bar 51 orientation burning passageway sets up. Further, the mounting holes 13 and the diffusion holes 14 are integrally connected and formed on the burner block 12; the spray pipe 52 is installed through the installation hole 13, and the outer wall of the spray pipe 52 is tightly attached to the installation hole 13 to avoid the heat in the combustion chamber 1 from flowing out; the combustion channel is a path for the mixed gas to complete the whole combustion process, the mixed gas sprayed from the material spraying head 51 completes the whole combustion process in the combustion channel, and the heat is radiated from one end of the combustion channel close to the inside of the combustion chamber 1, so that the generation of combustion pulsation is avoided as much as possible.
In a further embodiment of the present invention, the diameter of the end of the combustion channel close to the inner side of the burner block 12 is larger than the diameter of the end of the combustion channel close to the outer side of the burner block 12, and the combustion channel is arranged in a funnel shape. Further, the mixed gas is caused to start to diffuse and burn in the combustion passage at the moment of being ejected out of the material injection head 51, and the temperature distribution in the combustion chamber 1 is kept stable by rapidly diffusing the temperature generated by the combustion through the approximately funnel-shaped combustion passage.
In a further embodiment of the invention, the taper of the combustion passage is between 30 ° and 60 °.
In a further embodiment of the present invention, the method further comprises: each sealing ring 15 is sleeved at one end of the material spraying pipe 52, and one side of each sealing ring 15 is fixedly installed on the outer side of the burner block 12. Further, the sealing between the burner block 12 and the material spraying pipe 52 is enhanced.
In a further embodiment of the present invention, the flameless burner for forming a neutral borosilicate glass tube as described above comprises a plurality of burner blocks 12 and a plurality of burner bodies 5 correspondingly mounted on each burner block 12, wherein the plurality of burner blocks 12 are arranged around the entire combustion chamber 1, so that a temperature gradient of 300 degrees centigrade is formed in the space of the combustion chamber 1 to facilitate the forming of the glass tube and is kept stable.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A flameless burner for forming neutral borosilicate glass tubes, comprising:
the glass forming device comprises a combustion chamber, a rotary pipe and a forming device, wherein the combustion chamber is internally provided with the rotary pipe, and molten glass to be formed flows upwards the rotary pipe;
the premixer is arranged on one side of the combustion chamber and is of a cylindrical tank structure, the axis of the premixer is arranged along the horizontal direction, and mixed gas for combustion is injected into the premixer;
the upper end of each connecting pipe is connected with the lower end of the premixer;
the lower end of each connecting pipe is connected with the upper end of one connecting elbow, and the lower end of each connecting elbow is bent towards one side of the combustion chamber;
the combustor comprises a plurality of combustor main bodies, a plurality of connecting elbows and a plurality of connecting pipes, wherein each combustor main body is of a cylindrical structure, one end of each combustor main body is connected with the lower end of the connecting elbow, the other end of each combustor main body is inserted and installed on the combustion chamber, the other end of each combustor main body is communicated with the inside of the combustion chamber, and a certain distance is reserved between the other end of each combustor main body and the inner wall of the combustion chamber;
the burner main body includes: the spray pipe is of a hollow pipe body structure, a cavity is formed inside the spray pipe, one end of the spray pipe is fixedly connected with the lower end of the connecting elbow, the lower end of the connecting elbow is connected with one end of the spray pipe, and the other end of the spray pipe is connected with the spray head;
the material spraying head is of a conical structure protruding towards the inside of the combustion chamber;
the combustion chamber includes: frame main part and burner block, the frame main part is hollow structure, install in the frame main part the rotatory pipe, the burner block inlays to be located in the frame main part, spout the material pipe install with inserting in the burner block, a mounting hole and a diffusion hole have been seted up on the burner block, the mounting hole is the setting of round hole shape and is in the outside of burner block forms an installation passageway, the diffusion hole is seted up in the other end of mounting hole and at the inboard formation burning passageway of burner block, burning passageway with the coaxial setting of installation passageway, spout the material pipe install in the installation passageway, spout the stub bar orientation burning passageway sets up, spout the outer wall of material pipe with the mounting hole closely laminates.
2. The flameless burner for forming a neutral borosilicate glass tube according to claim 1, wherein the nozzle head has a plurality of nozzles uniformly formed thereon, and a center line of at least one of the nozzles coincides with a center line of the nozzle tube.
3. The flameless burner for forming a neutral borosilicate glass tube according to claim 2 wherein the centerline of each of said orifices is perpendicular to the outer surface of said jet head.
4. The flameless burner for forming a neutral borosilicate glass tube according to claim 2, wherein nine injection holes are formed in the injection head, and each injection hole has a diameter of 1.5mm to 3mm.
5. The flameless burner for forming a neutral borosilicate glass tube according to claim 1, wherein a diameter of an end of said combustion channel adjacent to an inner side of said burner block is larger than a diameter of an end of said combustion channel adjacent to an outer side of said burner block, and said combustion channel is funnel-shaped.
6. The flameless burner for forming neutral borosilicate glass tubes according to claim 1, wherein the taper of said combustion channel is in the range of 30 ° to 60 °.
7. The flameless burner for forming neutral borosilicate glass tubes according to claim 1, further comprising: and each sealing ring is sleeved at one end of the material spraying pipe, and one side of each sealing ring is fixedly arranged on the outer side of the burner block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126675.2A CN112228870B (en) | 2020-10-20 | 2020-10-20 | Flameless burner for forming neutral borosilicate glass tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011126675.2A CN112228870B (en) | 2020-10-20 | 2020-10-20 | Flameless burner for forming neutral borosilicate glass tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112228870A CN112228870A (en) | 2021-01-15 |
| CN112228870B true CN112228870B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011126675.2A Active CN112228870B (en) | 2020-10-20 | 2020-10-20 | Flameless burner for forming neutral borosilicate glass tube |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5256058A (en) * | 1992-03-30 | 1993-10-26 | Combustion Tec, Inc. | Method and apparatus for oxy-fuel heating with lowered NOx in high temperature corrosive environments |
| DE102004047443B3 (en) * | 2004-09-28 | 2006-03-23 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Flame lance inlet to furnace chamber for melting e.g. steel, non-ferrous metals, glass and ceramics has conical surround with convex profile |
| EP2392857A1 (en) * | 2010-06-07 | 2011-12-07 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Oxy-fuel burner |
| CN203656919U (en) * | 2013-11-18 | 2014-06-18 | 浙江善力高科新材料有限公司 | Gas proportion premixing flameless combustion device |
| CN206831503U (en) * | 2017-03-15 | 2018-01-02 | 佛山市东鹏陶瓷有限公司 | It is a kind of efficiently kiln burning bocca and use its kiln |
| CN208295917U (en) * | 2017-12-29 | 2018-12-28 | 天津燃洁斯工业设备有限公司 | A kind of release formula spray nozzle device for burner |
| CN209639000U (en) * | 2019-01-31 | 2019-11-15 | 高邑县北方窑业工程有限公司 | A kind of industrial kiln combustion gas and Combustion of Premixed device |
-
2020
- 2020-10-20 CN CN202011126675.2A patent/CN112228870B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5256058A (en) * | 1992-03-30 | 1993-10-26 | Combustion Tec, Inc. | Method and apparatus for oxy-fuel heating with lowered NOx in high temperature corrosive environments |
| DE102004047443B3 (en) * | 2004-09-28 | 2006-03-23 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Flame lance inlet to furnace chamber for melting e.g. steel, non-ferrous metals, glass and ceramics has conical surround with convex profile |
| EP2392857A1 (en) * | 2010-06-07 | 2011-12-07 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Oxy-fuel burner |
| CN203656919U (en) * | 2013-11-18 | 2014-06-18 | 浙江善力高科新材料有限公司 | Gas proportion premixing flameless combustion device |
| CN206831503U (en) * | 2017-03-15 | 2018-01-02 | 佛山市东鹏陶瓷有限公司 | It is a kind of efficiently kiln burning bocca and use its kiln |
| CN208295917U (en) * | 2017-12-29 | 2018-12-28 | 天津燃洁斯工业设备有限公司 | A kind of release formula spray nozzle device for burner |
| CN209639000U (en) * | 2019-01-31 | 2019-11-15 | 高邑县北方窑业工程有限公司 | A kind of industrial kiln combustion gas and Combustion of Premixed device |
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| CN112228870A (en) | 2021-01-15 |
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