CN109945192B - High-calorific-value fuel concentric jet air single-heat-storage burner - Google Patents
High-calorific-value fuel concentric jet air single-heat-storage burner Download PDFInfo
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- CN109945192B CN109945192B CN201910183293.4A CN201910183293A CN109945192B CN 109945192 B CN109945192 B CN 109945192B CN 201910183293 A CN201910183293 A CN 201910183293A CN 109945192 B CN109945192 B CN 109945192B
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- 239000000446 fuel Substances 0.000 title claims abstract description 33
- 238000005338 heat storage Methods 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 27
- 239000011449 brick Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000012774 insulation material Substances 0.000 claims abstract description 7
- 238000004873 anchoring Methods 0.000 claims abstract description 6
- 239000002737 fuel gas Substances 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 47
- 230000001172 regenerating effect Effects 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- -1 metallurgy Substances 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
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to a high-calorific-value fuel concentric jet air single heat storage burner, which is characterized in that: comprises a shell, a refractory heat insulation material, anchoring parts, a heat accumulating honeycomb body, a baffle brick and a burner block; according to the invention, the circulation stroke of the gas in the combustion space can be designed according to the combustion space, so that the combustion can be effectively organized, and the high-temperature flue gas is filled in the hearth, so that the secondary combustion of the fuel entering the heat storage box due to insufficient combustion can be avoided, and the heat storage body can be prevented from directly receiving high-temperature radiation, thereby protecting the baffle bricks and the honeycomb body; the air channel and the center of the burner are at an angle, so that the heat radiation of high-temperature flue gas to the heat accumulator can be blocked; the air nozzle and the gas nozzle of the regenerative combustion system are mutually independent, and through the nozzle form of the invention, the full combustion of fuel is beneficial to forming the low-oxygen atmosphere in the furnace, and the multistage combustion can expand the flame boundary, thereby avoiding influencing the heating quality or causing NO due to the overhigh local temperature x And the phenomenon of exceeding standard and the like.
Description
Technical Field
The invention relates to the field of industrial furnace heat supply equipment, in particular to a high-calorific-value fuel concentric jet air single heat storage burner.
Background
The heat accumulating combustion technology, also called high temperature air combustion technology (HTAC), is a new combustion technology which is promoted in developed countries in the 90 th century, has the advantages of high efficiency of flue gas waste heat recovery, high air and gas preheating temperature and low emission of nitrogen oxides, and is mainly used in the industrial departments of iron and steel, metallurgy, chemical industry, building materials and the like. The method has the characteristics of energy conservation, environmental protection and the like, has wide application in the industries in China, and obtains high economic and environmental benefits.
The regenerative burner is core equipment for implementing regenerative combustion technology. The heat accumulating chamber and the burner nozzles are organically combined into a whole, and the heat accumulating chamber is characterized in that each burner nozzle is an independent heat accumulating unit and can be independently adjusted.
The combustion nozzle is a key part of a combustion system, a reasonable combustion structure depends on the key part, the combustion structure ensures that fuel gas is fully combusted in the furnace, the fuel gas cannot be damaged due to secondary combustion in an opposite heat accumulator, meanwhile, the realization of low-oxygen combustion is reasonably promoted, local high-temperature overheating is avoided, the uniformity of the furnace temperature is enhanced, the generation of harmful gases such as NOx is reduced, and the occurrence of decarburization at high temperature is reduced. Therefore, the optimum gas outlet velocity and mixing injection angle are selected in the nozzle design.
Currently, a low-heating-value double-heat-accumulation type combustion system is mature. With the increasing stringent national requirements for environmental protection, industrial furnaces using clean high heating value fuels are increasing. There is a need to develop regenerator combustion systems that use clean high heating value fuels such as natural gas.
However, the single heat storage technology of the high-calorific-value fuel is still immature, and the double heat storage combustion mode of the low-calorific-value gas is used for reference; one of them adopts a combustion method (shown in fig. 1) of a left-right cross jet flow as in a double heat accumulation combustion method, in which fuel and hot air are ejected from two nozzles, and the mixing distance between the two is long. In the combustion process, the phenomenon of black smoke is easy to appear due to incomplete mixing of air and fuel gas, the combustion in a combustion chamber (in a hearth) is insufficient, and secondary combustion of fuel in a heat storage box is easy to occur. The gas channel has the defects of burner blockage and the like caused by carbon deposition phenomenon due to overhigh temperature generated by secondary combustion. The service life of the burner and adjacent equipment is also seriously affected by fuel waste. If the furnace is small in furnace width, even a large amount of fuel gas is discharged directly due to poor mixing effect, so that the fuel is seriously wasted. The other mode adopts a concentric jet flow single heat storage combustion mode, the fuel mixing mode is better than the former mode, but when the heat value of the fuel is higher, the phenomenon of insufficient combustion can still occur in a single nozzle, the phenomenon of black smoke is easy to occur due to incomplete mixing of air and fuel gas in the combustion process, the insufficient combustion is caused in a combustion chamber (in a hearth), and the secondary combustion of the fuel in a heat storage box is easy to occur. The gas channel has the defects of burner blockage and the like caused by carbon deposition phenomenon due to overhigh temperature generated by secondary combustion. The service life of the burner and adjacent equipment is also seriously affected by fuel waste. If the furnace is small in furnace width, even a large amount of fuel gas is discharged directly due to poor mixing effect, so that the fuel is seriously wasted. Meanwhile, in the concentric jet box structure, as the base wall provided with the jet opening is arranged in the box body, the volume of the inner cavity of the box body is reduced due to phase change, and the heat storage area is reduced, so that the energy-saving effect is directly influenced.
The temperature difference of the cold and hot air flows of the burner block is large (such as 1200 ℃ furnace temperature and about 1000 ℃ temperature difference), the burner block is alternately commutated once for about 60 seconds, the frequent commutation has extremely strict requirements on the thermal shock resistance of the refractory, and the service life of the burner block is short.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flame combustion device which can better organize flame combustion effect, namely realize energy saving and consumption reduction effects and simultaneously reduce NO by realizing multi-stage combustion x The production of the high-calorific-value fuel concentric jet air single-heat-storage burner is effectively prolonged, and the service lives of the baffle bricks, the honeycomb bodies, the burners and the burner bricks are prolonged.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a high calorific value fuel concentric jet air list regenerative burner which innovation point lies in: comprises a shell, a refractory heat insulation material, anchoring parts, a heat accumulating honeycomb body, a baffle brick and a burner block;
the shell is arranged above the burner block and communicated with the burner block, the inside and the outside of the shell are filled with refractory heat insulation materials, a burner cavity is formed in the shell, and the refractory heat insulation materials are connected to the shell through anchoring pieces;
the heat storage honeycomb body and the baffle brick are arranged at the bottom end of the inner wall of the burner cavity, and a smoke diffusion cavity is formed in the burner cavity above the heat storage honeycomb body and the baffle brick;
the outer wall of the burner block is also provided with a refractory heat-insulating material and is integrally formed with the refractory heat-insulating material of the outer wall of the shell; an air channel and a gas channel are arranged in the burner block; the air channels are arranged around the center line of the burner block along the vertical direction at an inclined angle, and the axes of the air nozzles of the air channels point to the center line of the burner block; the gas channel is provided with a plurality of gas channels, is arranged around the central line of the burner block along the vertical direction and is positioned at the inner side of the air channel.
Further, an air connecting pipe is connected to the outer side edge of the shell; and a gas connecting pipe communicated with the gas channel is connected to the outer wall of the burner block.
Further, the air channel comprises a diffusion section and a straight-through section, the diffusion section is connected with the straight-through section through a necking, and the diffusion section is a nozzle of the air channel.
Further, the number of the air channels and the fuel gas channels is at least two.
Further, the outlet of the air channel and the outlet of the gas channel are mutually spiral at an angle of 0-60 degrees or the air channel is parallel to the gas channel.
The invention has the advantages that:
1) According to the invention, the circulation stroke of the gas in the combustion space can be designed according to the combustion space, the combustion can be effectively organized, and the high-temperature flue gas is filled in the hearth, so that the secondary combustion of the fuel entering the heat storage box due to insufficient combustion can be avoided, and the heat storage body can be prevented from directly receiving high-temperature radiation, thereby protecting the baffle bricks and the honeycomb body.
2) The fuel can be fully mixed with air in multiple strands, so that multi-stage combustion is realized; therefore, the mixing path of the fuel and the combustion air can be shortened, the fuel is ensured to be completely mixed and combusted in a limited space, and the waste of the fuel is avoided.
3) The air channel and the center of the burner are at an angle, so that the heat radiation of high-temperature flue gas to the heat accumulator can be blocked, and the service lives of the burner block and the heat accumulator can be prolonged; the air nozzle and the gas nozzle of the regenerative combustion system are mutually independent and pass through the nozzle of the inventionIn the form, the full combustion of the fuel is beneficial to forming the low-oxygen atmosphere in the furnace, and the multi-stage combustion can expand the flame boundary to avoid influencing the heating quality or causing NO due to the overhigh local temperature x And the phenomenon of exceeding standard and the like.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a diagram of a single regenerative combustion structure in the conventional art.
FIG. 2 is a front view of a concentric jet air single heat accumulation burner for high heating value fuel.
FIG. 3 is a side view of a concentric jet air single heat accumulation burner of a high heating value fuel of the present invention.
FIG. 4 is a schematic diagram of a nozzle structure of a concentric jet air single heat accumulation burner for high heating value fuel.
Detailed Description
The following examples will provide those skilled in the art with a more complete understanding of the present invention and are not intended to limit the invention to the embodiments described.
The high-calorific-value fuel concentric jet air single heat accumulating burner shown in fig. 2 to 4 comprises a shell 1, a refractory heat insulating material 2, anchoring pieces 3, a heat accumulating honeycomb body 4, a baffle brick 5 and a burner block 6.
The casing 1 sets up in the top of burner block 6 and communicates between casing 1 and the burner block 6, the inside and the outside of casing 1 are all filled with refractory and heat insulating material 2, form the nozzle chamber in the inside of casing 1, refractory and heat insulating material 2 passes through anchor part 3 to be connected on casing 1.
The heat accumulating honeycomb body 4 and the baffle bricks 5 are arranged on the bottom end of the inner wall of the burner cavity, and a smoke diffusion cavity is formed in the burner cavity above the heat accumulating honeycomb body 4 and the baffle bricks 5.
The outer wall of the burner block 6 is also provided with a refractory heat-insulating material 2 and is integrally formed with the refractory heat-insulating material 2 on the outer wall of the shell 1; an air channel 61 and a fuel gas channel 62 are arranged in the burner block 6; the air channels 61 are provided with a plurality of air nozzles and are arranged around the central line of the burner block 6 at an inclined angle along the vertical direction, and the axes of the air nozzles of the air channels 61 are directed to the central line of the burner block 6; the gas passage 62 is provided in a plurality around the center line of the burner block 6 in the vertical direction and is located inside the air passage 61.
An air connecting pipe 63 is connected to the outer side edge of the shell 1; the outer wall of the burner block 6 is connected with a fuel gas connecting pipe 64 communicated with the fuel gas channel 62.
The air passage 61 includes a diffuser section and a straight-through section connected by a constriction, the diffuser section being the orifice of the air passage.
At least two air channels 61 and gas channels 62 are provided.
The outlet of the air passage 61 and the outlet of the gas passage 62 are mutually spiral at an angle of 0 to 60 or the air passage 61 is parallel to the gas passage 62.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A high-calorific-value fuel concentric jet air single heat accumulation burner is characterized in that: comprises a shell, a refractory heat insulation material, anchoring parts, a heat accumulating honeycomb body, a baffle brick and a burner block;
the shell is arranged above the burner block and communicated with the burner block, the inside and the outside of the shell are filled with refractory heat insulation materials, a burner cavity is formed in the shell, and the refractory heat insulation materials are connected to the shell through anchoring pieces;
the heat storage honeycomb body and the baffle brick are arranged at the bottom end of the inner wall of the burner cavity, and a smoke diffusion cavity is formed in the burner cavity above the heat storage honeycomb body and the baffle brick;
the outer wall of the burner block is also provided with a refractory heat-insulating material and is integrally formed with the refractory heat-insulating material of the outer wall of the shell;
an air channel and a gas channel are arranged in the burner block; the air channels are arranged around the center line of the burner block along the vertical direction at an inclined angle, and the axes of the air nozzles of the air channels point to the center line of the burner block; the gas channels are arranged around the central line of the burner block along the vertical direction and are positioned at the inner side of the air channel;
an air connecting pipe is connected to the outer side edge of the shell; the outer wall of the burner block is connected with a gas connecting pipe communicated with the gas channel;
the air channel comprises a diffusion section and a straight-through section, wherein the diffusion section is connected with the straight-through section through a necking, and the diffusion section is a nozzle of the air channel.
2. The high heating value fuel concentric jet air single heat storage burner of claim 1, wherein: the number of the air channels and the fuel gas channels is at least two.
3. The high heating value fuel concentric jet air single heat storage burner of claim 1, wherein: the outlet of the air channel and the outlet of the gas channel are mutually spiral at an angle of 0-60 degrees or the air channel is parallel to the gas channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910183293.4A CN109945192B (en) | 2019-03-12 | 2019-03-12 | High-calorific-value fuel concentric jet air single-heat-storage burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910183293.4A CN109945192B (en) | 2019-03-12 | 2019-03-12 | High-calorific-value fuel concentric jet air single-heat-storage burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109945192A CN109945192A (en) | 2019-06-28 |
| CN109945192B true CN109945192B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910183293.4A Active CN109945192B (en) | 2019-03-12 | 2019-03-12 | High-calorific-value fuel concentric jet air single-heat-storage burner |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500584A (en) * | 2019-09-29 | 2019-11-26 | 山东万方窑炉工程科技有限责任公司 | The low nitrogen single regenerative burner of exotic fuels |
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| Publication number | Publication date |
|---|---|
| CN109945192A (en) | 2019-06-28 |
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