CN220958461U - Oxygen-enriched burner with fin bionic structure - Google Patents
Oxygen-enriched burner with fin bionic structure Download PDFInfo
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- CN220958461U CN220958461U CN202322982050.1U CN202322982050U CN220958461U CN 220958461 U CN220958461 U CN 220958461U CN 202322982050 U CN202322982050 U CN 202322982050U CN 220958461 U CN220958461 U CN 220958461U
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- pipe
- oxygen
- fin
- mixing section
- burner
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 49
- 239000001301 oxygen Substances 0.000 title claims abstract description 47
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 15
- 210000004690 animal fin Anatomy 0.000 claims abstract description 8
- 230000003592 biomimetic effect Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 20
- 239000007789 gas Substances 0.000 abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Air Supply (AREA)
Abstract
The utility model relates to the technical field of heating furnace burners, in particular to an oxygen-enriched burner with a fin bionic structure, which comprises a burner body, wherein the front end of the burner body is connected with an oxygen spray pipe and a flue gas duct, the rear end of the burner body is provided with a burner nozzle, the burner body comprises a straight pipe mixing section, a supporting rod is arranged on the central axis of the burner body, a plurality of fin bionic structures are arranged on the supporting rod positioned on the straight pipe mixing section, a plurality of rows of triangular ribs are arranged on the inner wall of the straight pipe mixing section, and a fuel duct is connected with the rear end of the straight pipe mixing section. According to the utility model, through the fish fin bionic structure and the triangular ribs, the gas is more uniformly mixed, and through the three-stage reducing pipe, the gas flow velocity is increased, and the combustion efficiency of the burner is improved.
Description
Technical Field
The utility model relates to the technical field of heating furnace burners, and particularly provides an oxygen-enriched burner with a fin bionic structure.
Background
With the development of industry, the productivity is greatly improved, so that the carbon dioxide emitted by industry is increased, and the greenhouse effect is induced. The carbon emission in the steel industry is about 8% of the total national emission, and the conversion to green low carbon is urgently needed. The world carbon emissions in the previous years are in an increasing situation year by year, and the world economy growth is largely replaced by environmental sacrifice. Industry emissions reduction is therefore urgent, and among them, oxyfuel combustion is a combustion technology that can achieve energy conservation and reduced pollutant emissions.
The CO 2 emission reduction mode is quite various, wherein the carbon trapping and sealing technology is widely applied, and the cost for directly trapping CO 2 from the air is quite high, so the thought of improving the concentration of CO 2 is developed, the concentration of CO 2 is improved first, and then the CO is collected and treated, so that the cost can be greatly reduced. In order to realize the trapping and sealing of the high-concentration CO 2, pure oxygen is used as an oxidant in the oxygen-enriched combustion, so that the combustion products of the fuel only comprise H 2 O and CO 2, H 2 O in the products can be removed through dehydration, the dehydrated flue gas recovery is called dry flue gas recovery, and the residual high-purity CO2 is easy to realize the trapping and sealing, thereby reducing the influence of the CO2 on the environment. Oxygen-enriched combustion may be suitable for combustion of a variety of fuels. The O 2/CO2 combustion technology belongs to one of the oxygen-enriched combustion technologies. The principle is that O 2 and N 2 are separated from air by an air separator, pure oxygen is introduced into a combustion chamber as an oxidant to burn with fuel, and a mixture of combustion products H 2 O and CO 2 is used as circulating smoke gas to participate in combustion again. Thus, after the CO 2 is captured, the CO 2 can not be discharged into the atmosphere, and the emission of greenhouse gases is reduced. And the waste heat of the flue gas can be utilized to preheat the oxygen, so that the combustion efficiency is improved, the collection cost of the high-concentration CO 2 is lower, and the method is more in line with the economy. It is therefore highly desirable to develop new types of devices for oxycombustion in order to realize the advantages of oxycombustion technology.
The existing burner has a plurality of problems, namely, the energy consumption is high, a large amount of fuel is required to be consumed in the operation process, so that the energy consumption is high, the old burner does not conform to the new combustion technology, the efficiency is low, the energy cost and the consumption are increased, and the environmental problem is influenced. And secondly, the problem of environmental protection is that a large amount of harmful gases, solid particles and the like can be generated by a plurality of traditional combustion technologies, so that serious damage is caused. Third, the maintenance cost is high, and the problems of nozzle damage and the like caused by the local overhigh temperature of the nozzle can be caused in long-term operation.
Aiming at the industrial background, most of the existing combustors have the characteristics of insufficient mixing, uneven heat exchange, complex part mechanisms and the like.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the oxygen-enriched combustor with the fish fin bionic structure, the recycled flue gas and oxygen are fully premixed through the fish fin bionic structure and the triangular rib structure, the heat of the recycled flue gas is fully utilized, the temperature in the furnace is improved, and the fuel combustion utilization rate is improved. The reducer accelerates different objects, flame is formed in the tail end of the mixer, and a negative pressure area is formed finally through the reducer, so that smoke is refluxed, and the flame temperature is reduced. The utility model can fully improve the fuel utilization rate and the CO 2 capturing rate, better realize energy conservation and emission reduction and promote industrial development.
The utility model provides an oxygen-enriched combustor with a fin bionic structure, which comprises a combustor body, wherein the front end of the combustor body is connected with an oxygen spray pipe and a flue gas guide pipe, the rear end of the combustor body is provided with a combustor nozzle, the combustor body comprises a straight pipe mixing section, a supporting rod is arranged on the central axis of the combustor body, a plurality of fin bionic structures are arranged on the supporting rod positioned on the straight pipe mixing section, a plurality of rows of triangular ribs are arranged on the inner wall of the straight pipe mixing section, and a fuel guide pipe is connected with the rear end of the straight pipe mixing section.
Preferably, each fin bionic structure comprises four fin-like spoilers uniformly distributed along the circumference.
Further preferably, the fin biomimetic structure at the rear end is deflected 30 ° in a clockwise direction than the sequence at the front end in a front-to-back order.
Further preferably, the front end of the straight pipe mixing section is provided with a first reducing pipe, one end pipe diameter of the first reducing pipe connected with the straight pipe mixing section is small, the first reducing pipe is connected with the oxygen spray pipe and the flue gas guide pipe through the front end straight pipe section, the rear end of the straight pipe mixing section is provided with a second reducing pipe, one end pipe diameter of the second reducing pipe connected with the straight pipe mixing section is large, the rear end of the second reducing pipe is connected with a third reducing pipe through the rear end straight pipe section, and the rear end of the third reducing pipe is provided with the burner nozzle.
Further preferably, the oxygen spray pipe and the flue gas guide pipe are both provided with two oxygen spray pipes and two flue gas guide pipes, and the two oxygen spray pipes and the two flue gas guide pipes are symmetrically arranged by taking the central axis of the oxygen-enriched combustor as a symmetrical axis.
Further preferably, the fuel guide pipes are arranged in two, and are symmetrically arranged on the upper side and the lower side of the straight pipe mixing section.
Further preferably, the four fin bionic structures are arranged, and the maximum height of each fin bionic structure is 1/4-1/3 of the pipe diameter of the straight pipe mixing section; the triangular ribs are arranged in two rows and symmetrically arranged on the upper and lower parts of the inner wall of the straight pipe mixing section, and the height of each triangular rib is 1/6-1/5 of the pipe diameter of the straight pipe mixing section.
Compared with the prior art, the utility model has the advantages that:
1) In order to solve the problem of insufficient mixing, the utility model uses the fish fin bionic structure to fully mix the recycled flue gas and oxygen, the fish fin bionic structure and the triangular ribs enhance the turbulent mixing effect of the mixer, so that the waste heat of the flue gas is utilized more fully, the fully mixed fuel-oxygen mixture can enhance the combustion efficiency, and the pure oxygen is used as the combustion improver, so that the combustion efficiency is higher;
2) The utility model is provided with three sections of reducers, and the first reducer accelerates the mixture of the smoke and the oxygen; the second reducer increases the fuel passage, accelerates the three-gas mixture and ignites there; the third reducing pipe accelerates the mixed gas to roll up a large amount of smoke at the burner nozzle, a strong rolling effect is formed at the nozzle, the three-section reducing pipe accelerates the mixed gas to change into a high-speed jet flow to form a negative pressure area at the burner outlet, so that a large amount of smoke is rolled up and flows back, the flame temperature is reduced, the temperature control in the furnace is realized, the burning loss of a burner nozzle and a burner brick due to overheat is avoided, the refractory material requirement in the furnace is reduced, and the production cost is reduced.
Drawings
The utility model will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of a connection of a fin biomimetic structure to a support rod;
Fig. 3 is a schematic side view of fig. 2.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, 2 and 3, the utility model provides an oxygen-enriched combustor with a fin bionic structure, which comprises a combustor body 10, wherein the front end of the combustor body 10 is connected with an oxygen spray pipe 1 and a flue gas duct 2, the rear end of the combustor body is provided with a combustor nozzle 9, the combustor body 10 comprises a straight pipe mixing section 11, a supporting rod 12 is arranged on the central axis of the combustor body 10, a plurality of fin bionic structures 4 are arranged on the supporting rod 12 positioned on the straight pipe mixing section 11, a plurality of rows of triangular ribs 5 are arranged on the inner wall of the straight pipe mixing section 11, and the fuel duct 3 is connected with the rear end of the straight pipe mixing section 11.
The oxygen lance 1 is adapted to deliver pure oxygen at an oxygen flow rate u >60m/s and less than the speed of sound. The flue gas duct 2 is for transporting recycled flue gas, which has been subjected to a dehydration and impurity removal process, most of which are high temperature CO2 flue gas, also at a flow rate less than sonic velocity. The fuel channel delivers a gaseous fuel, one or more gases, the particular gaseous fuel being a matter of practical use.
The method comprises the following steps:
Step one: oxygen and flue gas are sprayed out of the oxygen spray pipe 1 and the flue gas guide pipe 2 and are sprayed into the burner, then flow into the straight pipe mixing section 11, and are uniformly mixed through the fin bionic structure 4 and the triangular ribs 5 to form flue gas-oxygen mixed gas, so that the mixing time is short, the efficiency is high, the full combustion of fuel is facilitated, and the utilization rate is improved;
Step two: the mixed fuel is sprayed into a burner at the rear section of the straight pipe mixing section 11 to be mixed with the smoke-oxygen mixed gas phase, and flame is generated in the mixer;
Step three: the mixture is sprayed out from the nozzle 9 by acceleration, a strong entrainment effect is formed at the nozzle, the entrainment effect causes a large amount of smoke to flow back, the flame temperature is reduced, the burning loss of a burner nozzle and a burner block due to overheating is avoided, the requirement on refractory materials in a furnace is reduced, and the production cost is reduced.
As a specific implementation manner of the fin bionic structures 4, each fin bionic structure 4 includes four fin-shaped spoilers 401 uniformly distributed along the circumference. Turbulence is achieved on the oxygen-flue gas mixture by the fish-like fin spoiler 401.
In order to further increase the turbulence effect, as an improvement, the fin-shaped bionic structure 4 at the rear end is deflected by 30 ° in the clockwise direction than the sequence of the front end in the order from front to rear.
The arrangement of the arc-shaped structure of the fin-shaped spoiler 401 can enable air to flow smoothly on the premise of spoiler.
For accelerating the flow of gas in the burner, as the improvement of technical scheme the front end of straight tube mixed section 11 is equipped with first pyrocondensation pipe 6, and the one end pipe diameter that first pyrocondensation pipe 6 and straight tube mixed section 11 are connected is little, and first pyrocondensation pipe 6 passes through front end straight tube section 13 and connects oxygen spray tube 1 with flue gas pipe 2, be equipped with second pyrocondensation pipe 7 at the rear end of straight tube mixed section 11, and the one end pipe diameter that second pyrocondensation pipe 7 and straight tube mixed section 11 are connected is big, and the rear end of second pyrocondensation pipe 7 passes through rear end straight tube section 14 and connects third pyrocondensation pipe 8, and the rear end of third pyrocondensation pipe 8 sets up burner spout 9.
The flue gas and the oxygen are accelerated through the first reducing pipe 6 to form a flue gas-oxygen mixed gas, the fuel and the flue gas-oxygen mixed gas are mixed and then are accelerated through the second reducing pipe 7, and the mixed gas is accelerated for the third time through the third reducing pipe 8 and is sprayed out of the nozzle 9.
Preferably, the oxygen spray pipe 1 and the flue gas guide pipe 2 are both provided with two, and the two oxygen spray pipes 1 and the two flue gas guide pipes 2 are symmetrically arranged by taking the central axis of the oxygen-enriched combustor as a symmetrical axis.
For uniform fuel intake, as an improvement, the fuel guide pipe 3 is provided with two fuel guide pipes symmetrically arranged on the upper side and the lower side of the straight pipe mixing section 11.
Preferably, in order to not affect the flow speed while turbulent flow is performed, the number of the fin bionic structures 4 is four, and the maximum height of each fin bionic structure 4 is 1/4-1/3 of the pipe diameter of the straight pipe mixing section 11; the triangular fins 5 are provided with two rows and are symmetrically arranged on the upper and lower parts of the inner wall of the straight pipe mixing section 11, and the height of each triangular fin 5 is 1/6-1/5 of the pipe diameter of the straight pipe mixing section 11.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (7)
1. Oxygen-enriched burner with fish fin bionic structure, a serial communication port, including combustor body (10), oxygen spray tube (1) and flue gas pipe (2) are connected to the front end at combustor body (10), and the rear end is combustor spout (9), and combustor body (10) are including straight tube mixed section (11), establish bracing piece (12) on the axis of combustor body (10), are equipped with a plurality of fish fin bionic structure (4) on bracing piece (12) that lie in straight tube mixed section (11), are equipped with a plurality of triangle-shaped fins (5) at the inner wall of straight tube mixed section (11), and fuel pipe (3) are connected at the rear end of straight tube mixed section (11).
2. The oxygen-enriched burner provided with the fin-shaped bionic structure according to claim 1, wherein each fin-shaped bionic structure (4) comprises four fin-shaped spoilers (401) uniformly distributed along the circumference.
3. The oxyfuel burner provided with a fin biomimetic structure according to claim 2, wherein the fin biomimetic structure (4) at the rear end is deflected 30 ° in clockwise direction than the sequence of the front end in the sequence from front to back.
4. The oxygen-enriched burner with the fish fin bionic structure according to claim 1, wherein the front end of the straight pipe mixing section (11) is provided with a first reducing pipe (6), one end pipe diameter of the first reducing pipe (6) connected with the straight pipe mixing section (11) is small, the first reducing pipe (6) is connected with the oxygen spray pipe (1) and the flue gas duct (2) through a front end straight pipe section (13), the rear end of the straight pipe mixing section (11) is provided with a second reducing pipe (7), one end pipe diameter of the second reducing pipe (7) connected with the straight pipe mixing section (11) is large, the rear end of the second reducing pipe (7) is connected with a third reducing pipe (8) through a rear end straight pipe section (14), and the rear end of the third reducing pipe (8) is provided with the burner nozzle (9).
5. The oxygen-enriched burner with the fin bionic structure according to claim 1, wherein two oxygen spray pipes (1) and two flue gas ducts (2) are respectively arranged, and the two oxygen spray pipes (1) and the two flue gas ducts (2) are symmetrically arranged by taking the central axis of the oxygen-enriched burner as a symmetry axis.
6. The oxygen-enriched burner with the fin bionic structure according to claim 1, wherein two fuel conduits (3) are symmetrically arranged on the upper side and the lower side of the straight pipe mixing section (11).
7. The oxygen-enriched burner provided with the fin bionic structure according to claim 1, wherein the number of the fin bionic structures (4) is four, and the maximum height of each fin bionic structure (4) is 1/4-1/3 of the pipe diameter of the straight pipe mixing section (11); the triangular ribs (5) are arranged in two rows and symmetrically arranged on the upper and lower sides of the inner wall of the straight pipe mixing section (11), and the height of each triangular rib (5) is 1/6-1/5 of the pipe diameter of the straight pipe mixing section (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322982050.1U CN220958461U (en) | 2023-11-06 | 2023-11-06 | Oxygen-enriched burner with fin bionic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322982050.1U CN220958461U (en) | 2023-11-06 | 2023-11-06 | Oxygen-enriched burner with fin bionic structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220958461U true CN220958461U (en) | 2024-05-14 |
Family
ID=91009398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322982050.1U Active CN220958461U (en) | 2023-11-06 | 2023-11-06 | Oxygen-enriched burner with fin bionic structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220958461U (en) |
-
2023
- 2023-11-06 CN CN202322982050.1U patent/CN220958461U/en active Active
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