CN204063109U - The mixing arrangement of a kind of pure oxygen and flue gas and oxygen enrichment boiler - Google Patents
The mixing arrangement of a kind of pure oxygen and flue gas and oxygen enrichment boiler Download PDFInfo
- Publication number
- CN204063109U CN204063109U CN201420450287.3U CN201420450287U CN204063109U CN 204063109 U CN204063109 U CN 204063109U CN 201420450287 U CN201420450287 U CN 201420450287U CN 204063109 U CN204063109 U CN 204063109U
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- CN
- China
- Prior art keywords
- oxygen
- flue gas
- filling container
- mixing arrangement
- main body
- Prior art date
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 239000001301 oxygen Substances 0.000 title claims abstract description 138
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 138
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000003546 flue gas Substances 0.000 title claims abstract description 103
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 36
- 230000003134 recirculating effect Effects 0.000 claims abstract description 36
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 239000002671 adjuvant Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229940063821 oxygen 21 % Drugs 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 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
- Y02E20/32—Direct CO2 mitigation
-
- 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
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- Air Supply (AREA)
Abstract
The utility model discloses mixing arrangement and the oxygen enrichment boiler of a kind of pure oxygen and flue gas, described mixing arrangement comprises recirculating gas duct (1) and oxygen filling container (2), the flue gas mixing unit (3) of cydariform is formed in described recirculating gas duct (1), described oxygen filling container (2) comprises the oxygen filling container main body (21) and note oxygen interface (22) that are connected, described oxygen filling container main body (21) is arranged in described flue gas mixing unit (3), described note oxygen interface (22) is protruding through the outer tube wall of described flue gas mixing unit (3), multiple note oxygen holes (5) of injecting pure oxygen to described flue gas mixing unit (3) are provided with in described oxygen filling container main body (21).This mixing arrangement can make pure oxygen and flue gas mix, and ensures the security of this mixing arrangement.
Description
Technical field
The utility model relates to boiler manfacturing and transformation field, particularly, relates to the mixing arrangement of a kind of pure oxygen and flue gas and has the oxygen enrichment boiler of described mixing arrangement.
Background technology
Oxygen-enriched combusting burns with than usual air (containing the oxygen 21%) oxygen-enriched air that oxygen concentration is high, mainly replaces air to carry out fuel combustion, to obtain the CO of high concentration with pure oxygen
2; For controlling boiler flame temperature and maintaining suitable heat-transfer character, partial fume is needed to recycle.Oxygen-enriched combustion technology, as a kind of novel clean fired coal combustion technology, can not only realize CO
2extensive trapping, can also NO be reduced
xand SO
2generation, thus reach the object of energy-saving and emission-reduction and reducing enterprise cost.
Oxygen enrichment boiler has used oxygen-enriched combustion technology to reach the object of saving the energy, decreasing pollution, the combustion adjuvant that oxygen enrichment boiler generally adopts the mode of pure oxygen and flue gas mixing to be formed is to make fired coal combustion, the mode of mixing pure oxygen and flue gas is divided into the non-premix of premix two kinds usually, if obtain the higher combustion adjuvant of oxygen content by the mode of premix, just need suitable mixing arrangement, pure oxygen is fully mixed with flue gas, while ensureing to mix, owing to having the imperfect combustion things such as coke in flue gas, go back the requirement of demand fulfillment security.
Utility model content
The purpose of this utility model is to provide the mixing arrangement of a kind of pure oxygen and flue gas, and this mixing arrangement can make pure oxygen and flue gas mix, and ensures the security of this mixing arrangement.
To achieve these goals, according to one side of the present utility model, provide the mixing arrangement of a kind of pure oxygen and flue gas, described mixing arrangement comprises recirculating gas duct and oxygen filling container, the flue gas mixing unit of cydariform is formed in described recirculating gas duct, described oxygen filling container comprises the oxygen filling container main body and note oxygen interface that are connected, described oxygen filling container main body is arranged in described flue gas mixing unit, described note oxygen interface is protruding through the outer tube wall of described flue gas mixing unit, is provided with the multiple note oxygen holes injecting pure oxygen to described flue gas mixing unit in described oxygen filling container main body.
Preferably, the described flue gas mixing unit of cydariform comprises the conical section of middle flared section and both sides, and described oxygen filling container is arranged in described middle flared section.
Preferably, the caliber of described middle flared section is not less than the twice of the minimum pipe of described conical section.
Preferably, described oxygen filling container main body is the hollow ring part arranged around the internal face of described flue gas mixing unit.
Preferably, described note oxygen interface is multiple, the plurality of note oxygen interface on the outer tube wall of described flue gas mixing unit circumferentially equably interval arrange, and be communicated with the cavity of described oxygen filling container main body respectively.
Preferably, along on the flow of flue gas direction of described recirculating gas duct, described note oxygen hole is formed on the lee face of described oxygen filling container main body.
Preferably, the area sum in the described note oxygen hole in described oxygen filling container main body is equal with the area sum of described note oxygen interface.
Preferably, multiple described note oxygen hole is formed on the wall of described oxygen filling container main body, and is greater than the aperture in the described note oxygen hole of the central axis near described recirculating gas duct away from the aperture in the described note oxygen hole of the central axis of described recirculating gas duct.
In addition, according to another aspect of the present utility model, provide a kind of oxygen enrichment boiler, the air preheater that described oxygen enrichment boiler comprises combustion adjuvant entrance and is connected with this combustion adjuvant entrance, described oxygen enrichment boiler also comprises pure oxygen described above and the mixing arrangement of flue gas, and the outlet of described mixing arrangement connects described air preheater.
Pass through technique scheme, a kind of pure oxygen provided according to the utility model and the mixing arrangement of flue gas, this mixing arrangement comprises recirculating gas duct and oxygen filling container, the flue gas mixing unit of cydariform is formed in recirculating gas duct, oxygen filling container comprises the oxygen filling container main body and note oxygen interface that are connected, oxygen filling container main body is arranged in flue gas mixing unit, and note oxygen interface is protruding through the outer tube wall of flue gas mixing unit, is provided with the multiple note oxygen holes injecting pure oxygen to flue gas mixing unit in oxygen filling container main body.Owing to being formed with the flue gas mixing unit of cydariform in recirculating gas duct, the mixing not being only pure oxygen and flue gas provides space, and make the flow velocity of the flue gas of the flue gas mixing unit of cydariform can not change excessive, again because pure oxygen enters by note oxygen interface the oxygen filling container main body communicated with it, being sprayed equably by pure oxygen by multiple note oxygen holes of being provided with in oxygen filling container main body enters in flue gas, and pure oxygen and flue gas are mixed within the very short Distance geometry time.In addition, be arranged in flue gas mixing unit by oxygen filling container, note oxygen interface is protruding through the outer tube wall of flue gas mixing unit, what adopt is the interior pouring-in of pure oxygen, when pure oxygen is entered in recirculating gas duct, pure oxygen can not be caused in the enrichment of flue near wall, prevent mixed flue gas and flue wall friction and the potential safety hazard that produces, ensure the safety of mixing arrangement.
Other feature and advantage of the present utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the pure oxygen of preferred embodiment of the present utility model and the mixing arrangement of flue gas;
Fig. 2 is the A-A sectional view of Fig. 1.
Description of reference numerals
1 recirculating gas duct 2 oxygen filling container
3 flue gas mixing unit 4 note oxygen holes
21 oxygen filling container main body 22 note oxygen interfaces
31 middle flared section 32 conical sections
BB ' central axis
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
In the utility model, when not doing contrary explanation, the noun of locality of use as " upper and lower, top, the end " normally for direction shown in the drawings or for each parts mutual alignment relationship description word vertically, on vertical or gravity direction.
As illustrated in fig. 1 and 2, the utility model provides the mixing arrangement of a kind of pure oxygen and flue gas, described mixing arrangement comprises recirculating gas duct 1 and oxygen filling container 2, the flue gas mixing unit 3 of cydariform is formed in recirculating gas duct 1, oxygen filling container 2 comprises the oxygen filling container main body 21 and note oxygen interface 22 that are connected, oxygen filling container main body 21 is arranged in flue gas mixing unit 3, note oxygen interface 22 is protruding through the outer tube wall of flue gas mixing unit 3, is provided with the multiple note oxygen holes 4 injecting pure oxygen to flue gas mixing unit 3 in oxygen filling container main body 21.Owing to being formed with the flue gas mixing unit 3 of cydariform in recirculating gas duct 1, the mixing not being only pure oxygen and flue gas provides space, and make the flow velocity of the flue gas of the flue gas mixing unit 3 of cydariform can not change excessive, again because pure oxygen enters by note oxygen interface 22 the oxygen filling container main body 21 communicated with it, being sprayed equably by pure oxygen by multiple note oxygen holes 4 of being provided with in oxygen filling container main body 21 enters in flue gas, and pure oxygen and flue gas are mixed within the very short Distance geometry time.In addition, be arranged in flue gas mixing unit 3 by oxygen filling container 2, note oxygen interface 22 is protruding through the outer tube wall of flue gas mixing unit 3, what adopt is the interior pouring-in of pure oxygen, when pure oxygen is entered in recirculating gas duct 1, pure oxygen can not be caused in the enrichment of flue near wall, prevent mixed flue gas and flue wall friction and the potential safety hazard that produces, ensure the safety of mixing arrangement.
Especially, the flue gas mixing unit 3 of cydariform comprises the conical section 32 of middle flared section 31 and both sides, and oxygen filling container 2 is arranged in middle flared section 31.Recirculating gas duct 1 adopts the mode of reducing, ensure on the position in the cross section of oxygen filling container 2, the flow velocity of the flue gas of recirculating gas duct 1 can not change excessive, thus makes the time of staying of flue gas in middle flared section 31 increase, thus make pure oxygen and flue gas mix evenly.
Especially, the caliber of middle flared section 31 is not less than the twice of the minimum pipe of conical section 32, middle flared section 31 provides larger space for the mixing of pure oxygen and flue gas, in conical section 32, along with the increase gradually of caliber, the flow velocity of flue gas also reduces thereupon, by the transition of conical section 32, flue gas is substantially steady at the flow velocity of middle flared section 31, flue gas was increased in the time of staying of middle flared section 31, thus improves the mixed effect of pure oxygen and flue gas.
Especially, oxygen filling container main body 21 is the hollow ring part arranged around the internal face of flue gas mixing unit 3, pure oxygen enters hollow ring part by note oxygen interface 22, because annular element makes the contact area of pure oxygen and flue gas more greatly, thus make pure oxygen and flue gas mix evenly.Again because oxygen filling container main body 21 arranges around the internal face of flue gas mixing unit 3, therefore the interior injection of pure oxygen is realized, by structure pouring-in in this, pure oxygen is more uniformly mixed with flue gas, and pure oxygen can not be caused in the enrichment of the near wall of recirculating gas duct 1, due to imperfect combustion things such as coke in flue gas, avoid the mixing flue gas of pure oxygen and the wall friction of recirculating gas duct 1 and the safety problem that produces, ensure that the safety of the mixing arrangement of pure oxygen and flue gas.
Especially, note oxygen interface 22 be multiple, the plurality of note oxygen interface 22 on the outer tube wall of flue gas mixing unit 3 circumferentially equably interval arrange, and the cavity of connection oxygen filling container main body 21 respectively.Because note oxygen interface 22 is multiple, therefore can select according to Production requirement the quantity noting oxygen interface 22, multiple note oxygen interface 22 on the outer tube wall of flue gas mixing unit 3 circumferentially equably interval arrange, the pure oxygen injected in flue gas mixing unit 3 is flowed evenly, more easily makes pure oxygen mix with flue gas.To inject the amount of pure oxygen by controlling note oxygen interface 22 to the cavity of oxygen filling container main body 21, regulating the mixed proportion of pure oxygen and flue gas, thus the demand of combustion adjuvant oxygen content under meeting different load.
As shown in Figure 1, the direction of arrow indication is the flow of flue gas direction of recirculating gas duct 1.In order to avoid due to inverse flow of flue gas direction, the pure oxygen being injected into recirculating gas duct 1 is blown back in oxygen filling container 2 due to the flowing of flue gas, pure oxygen is caused to inject, do not reach the effect of mixing, therefore, especially, as illustrated in fig. 1 and 2, in the preferred embodiment, along on the flow of flue gas direction of recirculating gas duct 1, note oxygen hole 4 is formed on the lee face of oxygen filling container main body 21, the pure oxygen being injected into recirculating gas duct 1 can be ejected in flue gas equably, thus improve the mixed effect of pure oxygen and flue gas.
Especially, as shown in Figure 2, the area sum in the note oxygen hole 4 in oxygen filling container main body 21 is equal with the area sum of note oxygen interface 22.Make to be injected into pure oxygen amount in oxygen filling container main body 21 with roughly equal by noting the pure oxygen amount that oxygen hole 4 is injected in recirculating gas duct 1 by note oxygen interface 22, ensure that excessive change can not occur the flow velocity of pure oxygen when injecting, being ejected in flue gas with making pure oxygen even.
Especially, multiple note oxygen hole 4 is formed on the wall of oxygen filling container main body 21, and is greater than the aperture in the note oxygen hole 4 of the central axis BB ' near recirculating gas duct 1 away from the aperture in the note oxygen hole 4 of the central axis BB ' of recirculating gas duct 1.The space contacted due to the note oxygen hole 4 of the central axis BB ' away from recirculating gas duct 1 is greater than the space contacted near the note oxygen hole 4 of the central axis BB ' of recirculating gas duct 1, therefore must be larger than the aperture in the note oxygen hole 4 of the central axis BB ' of close recirculating gas duct 1 by the aperture design in the note oxygen hole 4 of the central axis BB ' away from recirculating gas duct 1, thus pure oxygen was increased in the time of staying of flue gas mixing unit 3, ensure that pure oxygen and the good mixed effect of flue gas.
In addition, the utility model additionally provides a kind of oxygen enrichment boiler, the air preheater that oxygen enrichment boiler comprises combustion adjuvant entrance and is connected with this combustion adjuvant entrance, oxygen enrichment boiler also comprises pure oxygen described above and flue gas mixing arrangement, and the outlet of mixing arrangement connects air preheater.Air preheater utilizes the flue gas heat of boiler back end ductwork to heat the air entering boiler, thus reduce flue gas loss, improves EAT, improves the efficiency of boiler.In order to the safety of the mixing arrangement and oxygen enrichment boiler that ensure pure oxygen and flue gas, due to air preheater be connected with the entrance of mixing arrangement time, now the temperature of flue gas is higher, easily potential safety hazard is produced when mixing with the pure oxygen injected, therefore, in the utility model, air preheater is connected with the outlet of mixing arrangement, flue-gas temperature is now lower, ensure that the mixing arrangement of pure oxygen and flue gas and the security of oxygen enrichment boiler.
Below preferred embodiment of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (9)
1. the mixing arrangement of a pure oxygen and flue gas, it is characterized in that, described mixing arrangement comprises recirculating gas duct (1) and oxygen filling container (2), the flue gas mixing unit (3) of cydariform is formed in described recirculating gas duct (1), described oxygen filling container (2) comprises the oxygen filling container main body (21) and note oxygen interface (22) that are connected, described oxygen filling container main body (21) is arranged in described flue gas mixing unit (3), described note oxygen interface (22) is protruding through the outer tube wall of described flue gas mixing unit (3), multiple note oxygen holes (4) of injecting pure oxygen to described flue gas mixing unit (3) are provided with in described oxygen filling container main body (21).
2. mixing arrangement according to claim 1, it is characterized in that, the described flue gas mixing unit (3) of cydariform comprises the conical section (32) of middle flared section (31) and both sides, and described oxygen filling container (2) is arranged in described middle flared section (31).
3. mixing arrangement according to claim 2, is characterized in that, the caliber of described middle flared section (31) is not less than the twice of the minimum pipe of described conical section (32).
4. mixing arrangement according to claim 1, is characterized in that, described oxygen filling container main body (21) is the hollow ring part arranged around the internal face of described flue gas mixing unit (3).
5. mixing arrangement according to claim 4, it is characterized in that, described note oxygen interface (22) is for multiple, the plurality of note oxygen interface (22) on the outer tube wall of described flue gas mixing unit (3) circumferentially equably interval arrange, and be communicated with the cavity of described oxygen filling container main body (21) respectively.
6. mixing arrangement according to claim 1, is characterized in that, along on the flow of flue gas direction of described recirculating gas duct (1), described note oxygen hole (4) is formed on the lee face of described oxygen filling container main body (21).
7. mixing arrangement according to claim 6, is characterized in that, the area sum of the described note oxygen hole (4) on described oxygen filling container main body (21) is equal with the area sum of described note oxygen interface (22).
8. mixing arrangement according to claim 6, it is characterized in that, multiple described note oxygen hole (4) is formed on the wall of described oxygen filling container main body (21), and is greater than the aperture of the described note oxygen hole (4) of the central axis (BB ') near described recirculating gas duct (1) away from the aperture of the described note oxygen hole (4) of the central axis (BB ') of described recirculating gas duct (1).
9. an oxygen enrichment boiler, the air preheater that described oxygen enrichment boiler comprises combustion adjuvant entrance and is connected with this combustion adjuvant entrance, it is characterized in that, described oxygen enrichment boiler also comprises the mixing arrangement of pure oxygen in the claims 1-8 described in any one and flue gas, and the outlet of described mixing arrangement connects described air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420450287.3U CN204063109U (en) | 2014-08-11 | 2014-08-11 | The mixing arrangement of a kind of pure oxygen and flue gas and oxygen enrichment boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420450287.3U CN204063109U (en) | 2014-08-11 | 2014-08-11 | The mixing arrangement of a kind of pure oxygen and flue gas and oxygen enrichment boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204063109U true CN204063109U (en) | 2014-12-31 |
Family
ID=52204614
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420450287.3U Active CN204063109U (en) | 2014-08-11 | 2014-08-11 | The mixing arrangement of a kind of pure oxygen and flue gas and oxygen enrichment boiler |
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| CN (1) | CN204063109U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674322A (en) * | 2016-04-11 | 2016-06-15 | 中国神华能源股份有限公司 | Oxygen injection device of oxygen-enriched combustion boiler and oxygen-enriched combustion boiler |
| CN113531519A (en) * | 2021-07-01 | 2021-10-22 | 中国轻工业武汉设计工程有限责任公司 | Smoke recirculation nozzle device for preventing slagging and abrasion of boiler water-cooled wall |
-
2014
- 2014-08-11 CN CN201420450287.3U patent/CN204063109U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674322A (en) * | 2016-04-11 | 2016-06-15 | 中国神华能源股份有限公司 | Oxygen injection device of oxygen-enriched combustion boiler and oxygen-enriched combustion boiler |
| CN113531519A (en) * | 2021-07-01 | 2021-10-22 | 中国轻工业武汉设计工程有限责任公司 | Smoke recirculation nozzle device for preventing slagging and abrasion of boiler water-cooled wall |
| CN113531519B (en) * | 2021-07-01 | 2023-06-30 | 中国轻工业武汉设计工程有限责任公司 | Flue gas recirculation nozzle device for preventing boiler water-cooled wall from slagging and wearing |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |