CN101071043A - Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine - Google Patents
Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine Download PDFInfo
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- CN101071043A CN101071043A CNA2007100658586A CN200710065858A CN101071043A CN 101071043 A CN101071043 A CN 101071043A CN A2007100658586 A CNA2007100658586 A CN A2007100658586A CN 200710065858 A CN200710065858 A CN 200710065858A CN 101071043 A CN101071043 A CN 101071043A
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- 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
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Abstract
This invention involves a pure low temperature afterheat generating system, particularly the necessary steel mill burns the kink cold machine use the pure low temperature afterheat generating system. The steel-making burns in kink Leng Ji the low temperature afterheat generating system, burns the kink cold machine steam turbine, the generator, the first-level economizer, the second-level economizer, the evaporator, the first-level superheater including the steel-making, its characteristic lies in burns the kink coldly machine place above from to enter the material mouth along the red ore transportation direction high temperature, warm, on the low temperature three heat sources to arrange the first-level superheater, the evaporator + first-level economizer, the second-level economizer in turn, after first-level superheater the establishment has makes up burns the type second-level superheater, the merit lies in the structure to be simple, fully from the coal gas which produces and burns the kink cold machine waste gas afterheat using the steel mill maximum limit to transform into the electrical energy, afterheat power capacity and the existing fever kink is coldMachine the pure low temperature saturated steam afterheat power technology compares enhances above 50%, and improved the emissions to the environment the influence.
Description
Technical field
The present invention relates to a kind of pure middle and low temperature afterheat generating system, the pure middle and low temperature afterheat generating system that especially supporting steel mill sintering circular-cooler uses.
Background technology
Existing comparatively ripe sintering circular-cooler pure middle and low temperature afterheat generating system, its characteristics are:
1, make water pipe or finned tube as the residual heat boiler for exchanging heat element;
2, produce the steam of saturated vapor or low overheat;
3, adopt the saturated vapor generating, generating steam consumption height, generated output is low.
Above-mentioned three problems cause existing sintering circular-cooler pure middle and low temperature afterheat generating system: one, and the heat exchange element heat exchange efficiency is not high; Its two, waste heat can only be produced low-pressure low-temperature steam; Its three, circulation system can only adopt the low-pressure low-temperature parameter.Aforementioned three factors make the waste gas residual heat generating capacity fail to be not fully exerted, i.e. cogeneration amount can not reach should level.
Summary of the invention
Technical problem to be solved by this invention provides a kind of improvement of sintering circular-cooler pure middle and low temperature afterheat generating system, this system should be able to overcome disadvantages of background technology, the waste heat amount of being utilized is bigger, can produce the more steam of high pressure temperature grade, after being used for cogeneration, can increase substantially the cogeneration ability.
Technical scheme of the present invention is: steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation system, comprise the steel smelting sintering ring-cooling machine steam turbine, generator, the one-level economizer, the secondary economizer, evaporimeter, primary superheater, it is characterized in that above sintering circular-cooler the high temperature along red ore deposit throughput direction from feeding mouth, middle temperature, arrange primary superheater successively on low temperature three place's thermals source, evaporimeter+one-level economizer, the secondary economizer, after primary superheater, be provided with the compensation combustion type two-stage superheater, by the steam of further heating such as burning blast furnace gas or diesel oil from primary superheater.Described one-level is overheated, the heat transfer space in the evaporimeter, one-level economizer, secondary economizer is connected in series with the central cooler chimney.Described evaporimeter, one-level economizer, secondary economizer adopt heat pipe device heat exchange element.In the described central cooler cover waste gas baffle plate is set.Warm low pressure parameter steam turbine generator during described steam turbine generator is selected for use.
Arranging primary superheater, evaporimeter+one-level economizer, secondary economizer from feeding mouth successively on high temperature along red ore deposit throughput direction, middle temperature, the low temperature three place's thermals source above the sintering circular-cooler.Perforate above the central cooler cover, the former hot flue gas that enters atmosphere from the central cooler chimney is introduced heat exchanger, and the heat exchange element of evaporimeter, one-level economizer, secondary economizer adopts heat pipe, and it is poor to effectively reduce heat transfer temperature, by the cascade utilization heat, utilize flue gas heat to greatest extent.Waste gas after the heat exchange of process heat exchanger is still through original chimney emptying.In the central cooler cover, add dividing plate, guarantee the correct flow direction of the hot flue gas of high, medium and low temperature three place's thermals source a little more than the bed of material; Simultaneously, on the heat exchanger entrance flue, air-valve is set, does not influence the central cooler ordinary production when making the heat exchanger off-the-line.
Pass through the steam of further heating such as burning blast furnace gas or diesel oil at the compensation combustion type two-stage superheater from primary superheater.
The effect that the present invention can obtain is: under the condition that does not influence the sintering circular-cooler ordinary production, one adopts heat-pipe heat exchanger, waste heat can produce the superheated steam of 1.5MPa low pressure saturation temperature to 320 ℃, after process compensation combustion type two-stage superheater was overheated, vapor (steam) temperature can reach 400 ℃; Its two, warm low pressure parameter had improved circulation system efficient during circulation system can adopt; Its three, made full use of the waste heat of sintering circular-cooler different temperatures section waste gas, and realized that by the waste gas residual heat Temperature Distribution heat should carry out the principle of cascade utilization according to its temperature; Its four, aforesaid three factors, the present invention makes the sintering circular-cooler waste gas residual heat transform into electric energy to greatest extent, the cogeneration ability is compared with existing sintering circular-cooler pure middle and low temperature saturated steam afterheat generating technology and is improved more than 50%.
The invention has the advantages that simple in structure, make full use of self-produced coal gas of steel mill and sintering circular-cooler waste gas residual heat and transform into electric energy to greatest extent, the cogeneration ability is compared with existing sintering circular-cooler pure middle and low temperature saturated steam afterheat generating technology and is improved more than 50%, and has improved the influence of discharging to environment.
Description of drawings
Fig. 1 is existing not with the pure middle and low temperature afterheat generating system schematic diagram of compensation combustion type two-stage superheater.
Fig. 2 is the pure middle and low temperature afterheat generating system schematic diagram of band compensation combustion type two-stage superheater of the present invention.
Fig. 3 is a central cooler heat exchanger layout drawing.
1 is steam turbine among the figure, 2 is the one-level economizer, 3 is the secondary economizer, 4 is evaporimeter, 5 is drum, 6 is primary superheater, 7 is high-temperature flue gas, 8 is middle temperature flue gas, 9 is low-temperature flue gas, 10 is two-stage superheater, 11 is coal gas, 12 is diesel oil, 13 is surrounding air, 14 is primary superheater heat-obtaining mouth, 15 is evaporimeter+one-level economizer heat-obtaining mouth, 16 is secondary economizer heat-obtaining mouth, 17 is waste gas baffle plate 1,18 is waste gas baffle plate 2,19 is waste gas baffle plate 3,20 is material inlet, 21 is the mass transport direction, 22 is the central cooler cover.
The specific embodiment
As shown in Figure 3, the red ore deposit of sintering feed is from charging aperture in the process to discharging opening in the central cooler, and the surrounding air that blasts by air blast is cooled to its temperature below 150 ℃ gradually from about 650 ℃, produces 420 ℃, 370 ℃, 225 ℃ three strands of hot flue gases after the heat exchange.Wherein 420 ℃ flue gas enters original electric dust removing system, and 370 ℃ and 225 ℃ of flue gases enter atmosphere by chimney on the sintering circular-cooler.The solution of the present invention is a cascade utilization flue gas resource, and place, warm source arranges evaporimeter and one-level economizer in 370 ℃, locates to arrange the secondary economizer for 225 ℃ at low-temperature heat source, arranges primary superheater at 420 ℃ of high temperature heat source places.By heat exchange, the hot flue gas of central cooler can be produced 1.5MPa-320 ℃ superheated steam.
For keeping the stability of three place's thermal source EGTs and tolerance, improve heat utilization ratio, the waste gas baffle plate is set in the central cooler cover, baffle position as shown in Figure 3, height of baffle plate is controlled its lower edge a little more than bed of material top.
For further improving the efficient of steam turbine generator, compensation combustion type two-stage superheater system is set vapor (steam) temperature is increased to 400 ℃, afterburning is fuel used for steel mill blast furnace gas more than needed, replenishes a small amount of diesel oil when the blast furnace gas quantity not sufficient.
Warm low pressure parameter steam turbine during steam by secondary after overheated is suitable is compared with saturated vapor or low-temp low-pressure parameter steam turbine, and circulation system efficient is significantly improved, and to greatest extent waste heat is converted to electric energy.
Claims (5)
1, steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation system, comprise steel smelting sintering ring-cooling machine steam turbine, generator, one-level economizer, secondary economizer, evaporimeter, primary superheater, it is characterized in that arranging primary superheater, evaporimeter+one-level economizer, secondary economizer from feeding mouth successively on the high temperature along red ore deposit throughput direction, middle temperature, the low temperature three place's thermals source above the sintering circular-cooler, after primary superheater, be provided with the compensation combustion type two-stage superheater, by the steam of further heating such as burning blast furnace gas or diesel oil from primary superheater.
2, steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation according to claim 1 system is characterized in that described one-level is overheated, the heat transfer space in the evaporimeter, one-level economizer, secondary economizer is connected in series with the central cooler chimney.
3, steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation according to claim 1 system is characterized in that described evaporimeter, one-level economizer, secondary economizer adopt heat pipe device heat exchange element.
4, steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation according to claim 1 system is characterized in that in the described central cooler cover waste gas baffle plate being set.
5, steel smelting sintering ring-cooling machine middle and low temperature waste heat power generation according to claim 1 system, it is characterized in that described steam turbine generator select for use in warm low pressure parameter steam turbine generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100658586A CN100487350C (en) | 2007-05-09 | 2007-05-09 | Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100658586A CN100487350C (en) | 2007-05-09 | 2007-05-09 | Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine |
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| Publication Number | Publication Date |
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| CN101071043A true CN101071043A (en) | 2007-11-14 |
| CN100487350C CN100487350C (en) | 2009-05-13 |
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| CNB2007100658586A Expired - Fee Related CN100487350C (en) | 2007-05-09 | 2007-05-09 | Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871369A (en) * | 2010-05-28 | 2010-10-27 | 河北理工大学 | Overheating turbine generating system for recovering sensible heat of converter gas |
| CN101344359B (en) * | 2008-08-20 | 2011-04-20 | 首钢总公司 | Sintered ring cold exhaust heat stepped recovery power generation system and technique |
| CN101709918B (en) * | 2009-12-10 | 2011-07-20 | 浙江大学 | Integral cascade recovery system of associated energy sources during iron-making production |
| CN102243023A (en) * | 2011-04-20 | 2011-11-16 | 南志远 | Pure medium- and low-temperature residual heat power generation system for steel equipment |
| CN115654951A (en) * | 2022-12-27 | 2023-01-31 | 思源交大河北科技有限公司 | Heat accumulating type electric furnace flue gas waste heat recycling system |
-
2007
- 2007-05-09 CN CNB2007100658586A patent/CN100487350C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344359B (en) * | 2008-08-20 | 2011-04-20 | 首钢总公司 | Sintered ring cold exhaust heat stepped recovery power generation system and technique |
| CN101709918B (en) * | 2009-12-10 | 2011-07-20 | 浙江大学 | Integral cascade recovery system of associated energy sources during iron-making production |
| CN101871369A (en) * | 2010-05-28 | 2010-10-27 | 河北理工大学 | Overheating turbine generating system for recovering sensible heat of converter gas |
| CN101871369B (en) * | 2010-05-28 | 2013-06-19 | 河北理工大学 | Overheating turbine generating system for recovering sensible heat of converter gas |
| CN102243023A (en) * | 2011-04-20 | 2011-11-16 | 南志远 | Pure medium- and low-temperature residual heat power generation system for steel equipment |
| CN115654951A (en) * | 2022-12-27 | 2023-01-31 | 思源交大河北科技有限公司 | Heat accumulating type electric furnace flue gas waste heat recycling system |
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| CN100487350C (en) | 2009-05-13 |
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Owner name: YUNNAN SUNWISE ENERGY MANAGEMENT + CONTROL TECHNOL Free format text: FORMER OWNER: KUNMING SUNLIGHT JIYE CO.,LTD Effective date: 20140513 |
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Effective date of registration: 20140513 Address after: 650500 Xiangyang Road, information industry base, Kunming economic and Technological Development Zone, Yunnan Patentee after: Yunnan sunshine foundation energy control technology Limited by Share Ltd Address before: 650202 No. 2, tobacco road, Shibei District, Kunming, Yunnan Patentee before: Kunming Sunlight Jiye Co.,Ltd |
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