CN105276996A - Flue gas circulation sintering air mixing system - Google Patents
Flue gas circulation sintering air mixing system Download PDFInfo
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- CN105276996A CN105276996A CN201510872962.0A CN201510872962A CN105276996A CN 105276996 A CN105276996 A CN 105276996A CN 201510872962 A CN201510872962 A CN 201510872962A CN 105276996 A CN105276996 A CN 105276996A
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- flue gas
- guide plate
- used heat
- pipeline
- central cooler
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Abstract
The invention discloses a flue gas circulation sintering air mixing system. The system comprises a circulating flue gas pipeline, an annular cooler waste heat flue, and an air mixer arranged on the joint of the circulating flue and the annular cooler waste heat flue, wherein the air mixer comprises a cylindrical shell and a spiral guiding plate arranged in the shell, flue gas in the circulating flue generates rotational flow under the action of the spiral guiding plate, and strong turbulent flow is formed after the flue gas is mixed with waste heat air.
Description
Technical field
The invention belongs to metallurgical equipment and process regime, is the important step of Ferrous Metallurgy flue gas recirculation sintering process.On its flue gas recirculation airduct between sintering machine flue to pallet upper smoke gas hood.
Background technology
SINTERING PRODUCTION is when adopting flue gas recirculation sintering technology, usually by temperature in the sinter fume of originally all outer row and the relatively high partial fume of oxygen content, turn back to flue gas cover on sintering pallet through circulating fan to recycle, its objective is and reduce outer waste air total amount, the dual purpose recycled sensible heat and the latent heat of sinter fume simultaneously, reach energy-conservation, reduce discharging.According to the research report of domestic authoritative unit, when adopting flue gas recirculation sintering technology, ensure that the quality index of sintering deposit is unaffected, oxygen content in circulating flue gas must not lower than 18%, for reaching this guarantee value, usually require the part used heat air being mixed into central cooler discharge in the flue gas of low oxygen content.
Therefore, when adopting flue gas recirculation sintering technology, the Blending Efficiency of Blending of circulating flue gas and used heat air is directly connected to the quality index of sintering deposit.
The current domestic existing flue gas recirculation sintering air mixing device used as shown in Figure 1, from the circulating flue gas of circulating flue gas pipe 1 after entering mixed flue gas pipe 3, converge with the hot-air from used heat air hose 2, be then sent to the flue gas cover being positioned at sintering pallet top and use.The principle of this kind of flue gas air mixing device utilizes two kinds of flue gas flowings in the duct to carry out nature generation to interpenetrate, mix, its disadvantage is that mixing is uneven, especially within the scope of limited duct length, effective mixing is difficult to, thus cause mixed flue gas oxygen content on flue gas cover length direction uneven, and then affect the quality uniformity of sintering deposit.
Summary of the invention
For the problems referred to above, the invention provides a kind of mixing degree improving mixed flue gas, ensure the mixed wind system of flue gas recirculation sintering of the sinter quality of flue gas recirculation sintering process.
For achieving the above object, the present invention includes circulating flue gas pipeline, central cooler used heat pipeline and be arranged on the wind-mixer of described circulating flue gas pipeline and central cooler used heat pipeline junction, wherein said wind-mixer comprises cylinder-like shell and is arranged on the spiral guide plate in described shell, described central cooler used heat pipeline is set in described shell, described central cooler used heat pipeline and described shell are coaxially arranged, described circulating flue gas pipeline and the tangent setting of described shell, described circulating flue gas pipeline is communicated with described enclosure, described circulation guide plate is looped around described central cooler used heat pipeline, the outside of described circulation guide plate is connected with the inwall of described shell, the inner side of described circulation guide plate is connected with the outer wall of described central cooler used heat pipeline, flue gas in described cycle flue produces eddy flow under the effect of spiral guide plate, the rear turbulent flow that formed is converged by being connected with the mixed flue gas passage that described shell is connected with used heat air.
Further, the outer centrosymmetric structure of structure of described spiral guide plate, the helical angle of described spiral guide plate is 45 °.
The mixed wind system of flue gas recirculation sintering of the present invention, establishes a whirlwind guide way in the junction of circulating flue gas and used heat air, first circulating flue gas is formed eddy flow, and then converge the strong turbulent flow of rear formation with used heat air, thus obtain the mixed flue gas of highly mixing.Compared with sintering air mixing device with existing flue gas recirculation, adopt the advantage of novel air mixing device of the present invention to be the mixing degree greatly improving mixed flue gas, thus ensure that sintering process equilibrium is carried out, and then improve the quality of sintering deposit.
Accompanying drawing explanation
Fig. 1 is the mixed wind system structural representation of flue gas recirculation of the prior art sintering;
Fig. 2 is the mixed wind system structural representation of flue gas recirculation of the present invention sintering.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
Embodiment
As shown in Figure 2, the mixed wind system of the present embodiment flue gas recirculation sintering, comprise circulating flue gas pipeline 1, central cooler used heat pipeline 2 and be arranged on the wind-mixer 4 of described circulating flue gas pipeline and central cooler used heat pipeline junction, wherein said wind-mixer comprises cylinder-like shell and is arranged on the spiral guide plate 3 in described shell, described central cooler used heat pipeline is set in described shell, described central cooler used heat pipeline and described shell are coaxially arranged, described circulating flue gas pipeline and the tangent setting of described shell, described circulating flue gas pipeline is communicated with described enclosure, described circulation guide plate is looped around described central cooler used heat pipeline, the outside of described circulation guide plate is connected with the inwall of described shell, the inner side of described circulation guide plate is connected with the outer wall of described central cooler used heat pipeline, flue gas in described cycle flue produces eddy flow under the effect of spiral guide plate, the strong turbulent flow of rear formation is converged with used heat air, enter mixed flue gas pipeline 5.
The course of work of the present embodiment is: the circulating flue gas from sintering flue tangentially blasts circular wind-mixer by circulating fan via circulating flue gas pipe, eddy flow is produced under the effect of spiral guide plate, then converge with the used heat air axially entering wind-mixer and enter mixed flue gas pipe, there is strong immixture in the process, thus the mixed flue gas of height of formation mixing.
Further, the outer centrosymmetric structure of structure of described spiral guide plate, the helical angle of described spiral guide plate is 45 °.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.
Claims (2)
1. the mixed wind system of flue gas recirculation sintering, it is characterized in that: comprise circulating flue gas pipeline, central cooler used heat pipeline and be arranged on the wind-mixer of described circulating flue gas pipeline and central cooler used heat pipeline junction, wherein said wind-mixer comprises cylinder-like shell and is arranged on the spiral guide plate in described shell, described central cooler used heat pipeline is set in described shell, described central cooler used heat pipeline and described shell are coaxially arranged, described circulating flue gas pipeline and the tangent setting of described shell, described circulating flue gas pipeline is communicated with described enclosure, described circulation guide plate is looped around described central cooler used heat pipeline, the outside of described circulation guide plate is connected with the inwall of described shell, the inner side of described circulation guide plate is connected with the outer wall of described central cooler used heat pipeline, flue gas in described cycle flue produces eddy flow under the effect of spiral guide plate, the rear turbulent flow that formed is converged by being connected with the mixed flue gas passage that described shell is connected with used heat air.
2. the mixed wind system of flue gas recirculation sintering according to claim 1, is characterized in that: the outer centrosymmetric structure of structure of described spiral guide plate, the helical angle of described spiral guide plate is 45 °.
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CN201510872962.0A CN105276996B (en) | 2015-11-30 | 2015-11-30 | The mixed wind system of flue gas recirculation sintering |
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CN201510872962.0A CN105276996B (en) | 2015-11-30 | 2015-11-30 | The mixed wind system of flue gas recirculation sintering |
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CN105276996A true CN105276996A (en) | 2016-01-27 |
CN105276996B CN105276996B (en) | 2017-09-01 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113237347A (en) * | 2021-04-19 | 2021-08-10 | 北京首钢国际工程技术有限公司 | Sintering flue gas circulating air mixing method |
Citations (4)
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JP2000226618A (en) * | 1999-02-04 | 2000-08-15 | Kawasaki Steel Corp | Method for recovering exhaust heat in cooler for sintered ore and cooler for sintered ore |
CN103240014A (en) * | 2013-05-30 | 2013-08-14 | 中冶华天南京工程技术有限公司 | Flue gas mixing device |
CN104019672A (en) * | 2014-06-06 | 2014-09-03 | 上海金自天正信息技术有限公司 | Sintering flue gas treatment and cyclic utilization method |
CN205156632U (en) * | 2015-11-30 | 2016-04-13 | 中冶华天工程技术有限公司 | Flue gas recirculation sintering mixes wind system all |
-
2015
- 2015-11-30 CN CN201510872962.0A patent/CN105276996B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000226618A (en) * | 1999-02-04 | 2000-08-15 | Kawasaki Steel Corp | Method for recovering exhaust heat in cooler for sintered ore and cooler for sintered ore |
CN103240014A (en) * | 2013-05-30 | 2013-08-14 | 中冶华天南京工程技术有限公司 | Flue gas mixing device |
CN104019672A (en) * | 2014-06-06 | 2014-09-03 | 上海金自天正信息技术有限公司 | Sintering flue gas treatment and cyclic utilization method |
CN205156632U (en) * | 2015-11-30 | 2016-04-13 | 中冶华天工程技术有限公司 | Flue gas recirculation sintering mixes wind system all |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113237347A (en) * | 2021-04-19 | 2021-08-10 | 北京首钢国际工程技术有限公司 | Sintering flue gas circulating air mixing method |
CN113237347B (en) * | 2021-04-19 | 2022-12-13 | 北京首钢国际工程技术有限公司 | Sintering flue gas circulating air mixing method |
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Address after: Jianye District of Nanjing City, Jiangsu province 210019 the Fuchun River Street No. 18 Patentee after: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Address before: 243005 No. 699 West Hunan Road, Anhui, Ma'anshan Patentee before: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC |