CN104611501A - Equipment for recovering waste heat at converter first-flue-gas low-temperature segment and method - Google Patents
Equipment for recovering waste heat at converter first-flue-gas low-temperature segment and method Download PDFInfo
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- CN104611501A CN104611501A CN201410759531.9A CN201410759531A CN104611501A CN 104611501 A CN104611501 A CN 104611501A CN 201410759531 A CN201410759531 A CN 201410759531A CN 104611501 A CN104611501 A CN 104611501A
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- flue
- flue gas
- economizer
- vaporizer
- converter
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Abstract
The invention relates to equipment for recovering waste heat at a converter first-flue-gas low-temperature segment. The equipment is connected with an evaporation cooling flue, and comprises an evaporation cooling flue extending segment; one end of the evaporation cooling flue extending segment is connected with the evaporation cooling flue, and the other end is connected with a thermal-insulation flue; the thermal-insulation flue is connected with an evaporator, the evaporator is connected with a coal economizer, the coal economizer is connected with an inertia-force dust collector, and the inertia-force dust collector is connected with an outlet flue-gas pipeline; the evaporation cooling flue extending segment and the evaporator are both communicated with the coal economizer via pipelines; after hot water in the coal economizer enters the evaporation cooling flue extending segment and the evaporator, hot water is heated by flue gas with heat in the extending segment and the evaporator and forms saturated water vapour; and an evaporation cooler is provided with an explosion venting valve, and the outlet flue-gas pipeline is provided with a double-medium spray gun device used for spraying atomized liquid drops. The invention also provides a recovery method by using the equipment for recovering waste heat at the converter first-flue-gas low-temperature segment. The equipment for recovering waste heat at the converter first-flue-gas low-temperature segment is relatively safe to use and relatively low in cost.
Description
Technical field
The present invention relates to a kind of converter flue gas low-temperature section waste heat recovery apparatus and method.
Background technology
Converter Residual Heat Boiler back-end ductwork due to existing technique exports a flue-gas temperature still about 900 DEG C, no matter that wet method or dry cleaning and recovery process all do not reclaim this partial heat again, cause partial heat to lose, do not have the reason reclaimed to be worry the safety problem of waste heat recovery.
But residual heat and energy is recycled will effectively reduce steel products production cost, therefore need recycle this partial heat under the prerequisite solving safety problem.
Therefore be necessary to design a kind of converter flue gas low-temperature section waste heat recovery apparatus and method, to overcome the problems referred to above.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide a kind of security higher converter flue gas low-temperature section waste heat recovery apparatus and method.
The present invention is achieved in that
The invention provides a kind of converter flue gas low-temperature section waste heat recovery apparatus, be connected to gasification cooling flue, comprise gasification cooling flue extension, adiabatic flue, vaporizer, economizer, mass force cleaning apparatus and exiting flue gas pipeline; One end of described gasification cooling flue extension is connected with described gasification cooling flue, the other end is connected with described adiabatic flue, described adiabatic flue is connected with described vaporizer, described vaporizer is connected with described economizer, described economizer is connected with described mass force cleaning apparatus, described mass force cleaning apparatus and described exiting flue gas pipeline; Wherein, described gasification cooling flue extension and described vaporizer pass through pipeline connection with described economizer respectively, after hot water in described economizer enters described gasification cooling flue extension and described vaporizer, by the flue gas heating generation saturated steam of its inside with heat; Described evaporative cooler is provided with explosion venting valve, described exiting flue gas pipeline is provided with two medium spray gun device, for jet atomization drop.
Further, described mass force cleaning apparatus is built-in with scraper ash-transmission machine.
Further, described vaporizer and described economizer are equipped with long telescopic soot blower.
Further, described long telescopic soot blower adopts nitrogen as blowing grey source of the gas.
Further, described exiting flue gas pipeline is connected to follow-up dust removal installation by cleaning shaft.
The present invention also provides the recovery method of a kind of converter flue gas low-temperature section waste heat recovery apparatus, comprise the following steps: step one: during converter smelting, gasification cooling flue afterbody temperature out is that the flue gas of 900 DEG C enters into gasification cooling flue extension, through radiation heat transfer in this equipment, flue-gas temperature is cooled in the scope of 660 DEG C-680 DEG C, wherein, changing thermogenetic heat for heating the hot water from economizer, making it produce saturated steam; Step 2: from gasification cooling flue extension flue gas out after adiabatic flue, enter in vaporizer, through indirect heat exchange in vaporizer, flue-gas temperature after heat exchange is in the scope of 300 DEG C-320 DEG C, changing thermogenetic heat for heating the hot water from economizer, making it produce saturated steam; Wherein, described vaporizer is provided with explosion venting valve; Step 3: the flue gas after evaporator heat exchange enters into economizer, the heat of flue gas carries out heat exchange by the service water of 25-35 DEG C, flue-gas temperature be reduced in the scope of 200 DEG C-250 DEG C, the hot water of 100 DEG C-110 DEG C that are formed by service water enters into gasification cooling flue extension by pipeline and vaporizer produces saturated steam; Step 4: enter into mass force cleaning apparatus from economizer flue gas out, thick dedusting is carried out to ash-laden gas; Step 5: the flue gas after thick dedusting enters in exiting flue gas pipeline, the atomizing droplet sprayed with the two medium spray gun devices be arranged in described exiting flue gas pipeline carries out direct heat exchange, temperature is reduced within the scope of 180 ~ 200 DEG C; Step 6: carry out follow-up dedusting by cleaning shaft from exiting flue gas pipeline flue gas out.
Further, described vaporizer and described economizer are equipped with long telescopic soot blower.
Further, described long telescopic soot blower adopts nitrogen as blowing grey source of the gas.
The present invention has following beneficial effect:
Described vaporizer is provided with explosion venting valve, when blasting, explosion venting valve is opened and makes pressure release, ensure device security; After hot water simultaneously in described economizer enters described gasification cooling flue extension and described vaporizer, by the flue gas heating generation saturated steam of its inside with heat, thus the abundant recycling achieved fume afterheat, effectively reduce production cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the converter flue gas low-temperature section waste heat recovery apparatus that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
As Fig. 1, the embodiment of the present invention provides a kind of converter a flue gas low-temperature section waste heat recovery apparatus, be connected to gasification cooling flue 1, comprise gasification cooling flue extension 2, adiabatic flue 3, vaporizer 4, economizer 6, mass force cleaning apparatus 7 and exiting flue gas pipeline 8.
As Fig. 1, one end of described gasification cooling flue extension 2 is connected with described gasification cooling flue 1, the other end is connected with described adiabatic flue 3, described adiabatic flue 3 is connected with described vaporizer 4, described vaporizer 4 is connected with described economizer 6, described economizer 6 is connected with described mass force cleaning apparatus 7, and described mass force cleaning apparatus 7 and described exiting flue gas pipeline 8, described mass force cleaning apparatus 7 is built-in with scraper ash-transmission machine.Wherein, described gasification cooling flue extension 2 and described vaporizer 4 pass through pipeline connection with described economizer 6 respectively, after hot water in described economizer 6 enters described gasification cooling flue extension 2 and described vaporizer 4, by the flue gas heating generation saturated steam of its inside with heat, thus the abundant recycling achieved fume afterheat, effectively reduce production cost.Described evaporative cooler is provided with explosion venting valve, when blasting, explosion venting valve is opened and makes pressure release, ensure device security.Described exiting flue gas pipeline 8 is provided with two medium spray gun device 9, for jet atomization drop, atomizing spray plays the modified effect to flue gas, is convenient to follow-up smart dedusting; Described exiting flue gas pipeline 8 is connected to follow-up dust removal installation by cleaning shaft, carries out purifying and coal-gas recovering etc.
As Fig. 1, in addition, described vaporizer 4 and described economizer 6 are equipped with long telescopic soot blower 5, ensure the heat exchange efficiency of heat-transfer surface, described long telescopic soot blower 5 adopts nitrogen as blowing grey source of the gas.
As Fig. 1, the present invention also provides the recovery method of a kind of converter flue gas low-temperature section waste heat recovery apparatus, and it comprises the following steps:
Step one: during converter smelting, gasification cooling flue 1 afterbody temperature out is that the flue gas of 900 DEG C enters into gasification cooling flue extension 2, through radiation heat transfer in this equipment, flue-gas temperature is cooled in the scope of 660 DEG C-680 DEG C, wherein, changing thermogenetic heat for heating the hot water from economizer 6, making it produce saturated steam;
Step 2: from gasification cooling flue extension 2 flue gas out after adiabatic flue 3, enter in vaporizer 4, through indirect heat exchange in vaporizer 4, flue-gas temperature after heat exchange is in the scope of 300 DEG C-320 DEG C, changing thermogenetic heat for heating the hot water from economizer 6, making it produce saturated steam; Wherein, in order to ensure security of system, vaporizer 4 is provided with explosion venting valve; When blasting, explosion venting valve is opened pressure release, ensures device security;
Step 3: the flue gas after evaporator 4 heat exchange enters into economizer 6, the heat of flue gas carries out heat exchange by the service water of 25-35 DEG C, flue-gas temperature be reduced in the scope of 200 DEG C-250 DEG C, the hot water of 100 DEG C-110 DEG C that are formed by service water enters into gasification cooling flue extension 2 by pipeline and vaporizer 4 produces saturated steam;
Step 4: enter into mass force cleaning apparatus 7 from economizer 6 flue gas out, thick dedusting is carried out to ash-laden gas;
Step 5: the flue gas after thick dedusting enters in exiting flue gas pipeline 8, the atomizing droplet sprayed with the two medium spray gun devices 9 be arranged in described exiting flue gas pipeline 8 carries out direct heat exchange, temperature is reduced within the scope of 180 ~ 200 DEG C; Atomizing spray plays the modified effect to flue gas, is convenient to follow-up smart dedusting.
Step 6: carry out follow-up dedusting from exiting flue gas pipeline 8 flue gas out by cleaning shaft, specifically refer to an access follow-up dust removal installation, carries out purifying and coal-gas recovering etc.
In sum, explosion venting valve, by being provided with explosion venting valve on vaporizer 4, when blasting, being opened and being made pressure release by described converter flue gas low-temperature section waste heat recovery apparatus, ensures device security; After hot water simultaneously in described economizer 6 enters described gasification cooling flue extension 2 and described vaporizer 4, by the flue gas heating generation saturated steam of its inside with heat, thus the abundant recycling achieved fume afterheat, effectively reduce production cost.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. converter flue gas low-temperature section waste heat recovery apparatus, is connected to gasification cooling flue, it is characterized in that, comprise gasification cooling flue extension, adiabatic flue, vaporizer, economizer, mass force cleaning apparatus and exiting flue gas pipeline;
One end of described gasification cooling flue extension is connected with described gasification cooling flue, the other end is connected with described adiabatic flue, described adiabatic flue is connected with described vaporizer, described vaporizer is connected with described economizer, described economizer is connected with described mass force cleaning apparatus, described mass force cleaning apparatus and described exiting flue gas pipeline;
Wherein, described gasification cooling flue extension and described vaporizer pass through pipeline connection with described economizer respectively, after hot water in described economizer enters described gasification cooling flue extension and described vaporizer, by the flue gas heating generation saturated steam of its inside with heat;
Described evaporative cooler is provided with explosion venting valve, described exiting flue gas pipeline is provided with two medium spray gun device, for jet atomization drop.
2. converter flue gas low-temperature section waste heat recovery apparatus as claimed in claim 1, is characterized in that: described mass force cleaning apparatus is built-in with scraper ash-transmission machine.
3. converter flue gas low-temperature section waste heat recovery apparatus as claimed in claim 1, is characterized in that: described vaporizer and described economizer are equipped with long telescopic soot blower.
4. converter flue gas low-temperature section waste heat recovery apparatus as claimed in claim 3, is characterized in that: described long telescopic soot blower adopts nitrogen as blowing grey source of the gas.
5. converter flue gas low-temperature section waste heat recovery apparatus as claimed in claim 1, is characterized in that: described exiting flue gas pipeline is connected to follow-up dust removal installation by cleaning shaft.
6. the recovery method of the flue gas low-temperature section waste heat recovery apparatus of the converter as described in any one of claim 1-5, is characterized in that, comprise the following steps:
Step one: during converter smelting, gasification cooling flue afterbody temperature out is that the flue gas of 900 DEG C enters into gasification cooling flue extension, through radiation heat transfer in this equipment, flue-gas temperature is cooled in the scope of 660 DEG C-680 DEG C, wherein, changing thermogenetic heat for heating the hot water from economizer, making it produce saturated steam;
Step 2: from gasification cooling flue extension flue gas out after adiabatic flue, enter in vaporizer, through indirect heat exchange in vaporizer, flue-gas temperature after heat exchange is in the scope of 300 DEG C-320 DEG C, changing thermogenetic heat for heating the hot water from economizer, making it produce saturated steam; Wherein, described vaporizer is provided with explosion venting valve;
Step 3: the flue gas after evaporator heat exchange enters into economizer, the heat of flue gas carries out heat exchange by the service water of 25-35 DEG C, flue-gas temperature be reduced in the scope of 200 DEG C-250 DEG C, the hot water of 100 DEG C-110 DEG C that are formed by service water enters into gasification cooling flue extension by pipeline and vaporizer produces saturated steam;
Step 4: enter into mass force cleaning apparatus from economizer flue gas out, thick dedusting is carried out to ash-laden gas;
Step 5: the flue gas after thick dedusting enters in exiting flue gas pipeline, the atomizing droplet sprayed with the two medium spray gun devices be arranged in described exiting flue gas pipeline carries out direct heat exchange, temperature is reduced within the scope of 180 ~ 200 DEG C;
Step 6: carry out follow-up dedusting by cleaning shaft from exiting flue gas pipeline flue gas out.
7. recovery method as claimed in claim 6, is characterized in that: described vaporizer and described economizer are equipped with long telescopic soot blower.
8. recovery method as claimed in claim 7, is characterized in that: described long telescopic soot blower adopts nitrogen as blowing grey source of the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759531.9A CN104611501B (en) | 2014-12-12 | 2014-12-12 | Flue gas low-temperature section waste heat recovery apparatus of converter and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410759531.9A CN104611501B (en) | 2014-12-12 | 2014-12-12 | Flue gas low-temperature section waste heat recovery apparatus of converter and method |
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| Publication Number | Publication Date |
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| CN104611501A true CN104611501A (en) | 2015-05-13 |
| CN104611501B CN104611501B (en) | 2016-11-30 |
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| CN201410759531.9A Active CN104611501B (en) | 2014-12-12 | 2014-12-12 | Flue gas low-temperature section waste heat recovery apparatus of converter and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107164599A (en) * | 2017-06-23 | 2017-09-15 | 中冶赛迪技术研究中心有限公司 | A kind of high-temperature combustible gas body residual neat recovering system and method |
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| CN1962884A (en) * | 2006-12-07 | 2007-05-16 | 昆明阳光数字技术股份有限公司 | Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas |
| CN1971191A (en) * | 2006-12-07 | 2007-05-30 | 昆明阳光数字技术股份有限公司 | Process for recovery of excess energy of flue gas from converter |
| CN101691624A (en) * | 2009-09-21 | 2010-04-07 | 无锡市东方环境工程设计研究所有限公司 | Purifying and recovering process of absolute dry bag-type converter gas negative energy |
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN104004879A (en) * | 2014-06-11 | 2014-08-27 | 中冶南方工程技术有限公司 | Equipment and method for recovering low-temperature-section waste heat of primary converter flue gas |
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2014
- 2014-12-12 CN CN201410759531.9A patent/CN104611501B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962884A (en) * | 2006-12-07 | 2007-05-16 | 昆明阳光数字技术股份有限公司 | Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas |
| CN1971191A (en) * | 2006-12-07 | 2007-05-30 | 昆明阳光数字技术股份有限公司 | Process for recovery of excess energy of flue gas from converter |
| CN101691624A (en) * | 2009-09-21 | 2010-04-07 | 无锡市东方环境工程设计研究所有限公司 | Purifying and recovering process of absolute dry bag-type converter gas negative energy |
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN104004879A (en) * | 2014-06-11 | 2014-08-27 | 中冶南方工程技术有限公司 | Equipment and method for recovering low-temperature-section waste heat of primary converter flue gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107164599A (en) * | 2017-06-23 | 2017-09-15 | 中冶赛迪技术研究中心有限公司 | A kind of high-temperature combustible gas body residual neat recovering system and method |
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| CN104611501B (en) | 2016-11-30 |
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Inventor after: Wang Liang Inventor after: Liu Changjian Inventor after: Wang Yonggang Inventor after: Ge Lei Inventor before: Ji Shichang Inventor before: Wang Liang Inventor before: Wang Yonggang Inventor before: Ge Lei |
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