CN101699038A - Sintering ore cooling waste gas full combustion-supporting generating set - Google Patents
Sintering ore cooling waste gas full combustion-supporting generating set Download PDFInfo
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- CN101699038A CN101699038A CN200910223749A CN200910223749A CN101699038A CN 101699038 A CN101699038 A CN 101699038A CN 200910223749 A CN200910223749 A CN 200910223749A CN 200910223749 A CN200910223749 A CN 200910223749A CN 101699038 A CN101699038 A CN 101699038A
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Abstract
The invention relates to a method for reclaiming sintering ore cooling waste gas low-temperature waste heat, in particular to a sintering ore cooling waste gas full combustion-supporting generating set, which comprises a fuel supply system forming a conventional fuel boiler generating system, a generating boiler, a steam turbine, a generator, a condenser, a circulating water pump, a cooling tower, a water supplementing pump, a condensed water pump, a low-pressure heater, a deaerator, a water supply pump, a draft fan and a chimney, and also comprises a sintering ore cooling waste gas collector and a waste gas pressurizer, wherein the waste gas collector is placed above a sintering machine of which a water gas output pipe is connected with a combustion chamber of the generating boiler, and the water gas output pipe is provided with the waste gas pressurizer. The device has the advantages that: the reclaiming rate of the waste heat of the sintering ore cooling waste gas is greatly improved, the waste heat grade of the sintering ore cooling waste gas is greatly improved, the basic Rankine cycle efficiency of the generating system is greatly improved, the vast disposable investment and precious land resources are saved, the running expense of the generating system is greatly reduced, and the management fee of the generating system is greatly reduced.
Description
Technical field:
The present invention relates to sintering ore cooling waste gas low temperature exhaust heat recovery method, particularly a kind of sintering ore cooling waste gas full combustion-supporting generating set that sintering ore cooling waste gas all is used for the conventional power generation usage boiler auxiliary combustion.
Background technique:
At present, the method that reclaims the sintering ore cooling waste gas low temperature exhaust heat has two kinds, and the one, the Steam Recovery method: give the water generates low pressure steam with the sintering ore cooling waste gas heating boiler, low pressure steam is supplied with technology and life vapour.The 2nd, the power recovery method: with the feedwater of sintering ore cooling waste gas heating boiler, the low pressure steam pushing turbine generating that utilizes its low temperature exhaust heat to produce.
Because Steam Recovery method technology is simple, investment is less, it is the highest sintering ore cooling waste gas low temperature exhaust heat recovery method of present utility ratio, but because sintering circuit is lower with the vapour parameter, steam consumption is less, and life has seasonality or discontinuity again with vapour, the situation that exists the waste heat grade in utilizing process, to be lowered in the production, and have steam productive rate situation on the low side or that diffuse in a large number because steam toos many or too much for use.Statistics shows that the average heat recovery rate of the sintering ore cooling waste gas in this recovery technology is no more than 40%.
There is following shortcoming in power recovery technology:
(1) because the fluctuating range of sintering ore cooling waste gas parameter (exhaust gas temperature, exhaust gas flow) is bigger; so the stability of sintering ore cooling waste gas low-temperature cogeneration system is lower; outage rate, low-load rate; especially the low service system failure rate is higher; even the situation that exists low service system to stop using fully, thereby the real economy that causes sintering ore cooling waste gas low-temperature cogeneration system is well below design load.
(2) because sintering ore cooling waste gas temperature lower (generally having only 300-360 ℃), so the main steam condition that is produced by the sintering ore cooling waste gas exhaust heat boiler is also lower, cause the efficiency of thermal cycle of sintering ore cooling waste gas low-temperature cogeneration system lower, and because sintering ore cooling waste gas exhaust heat boiler temperature of exhaust fume is higher, so the sintering ore cooling waste gas exhaust heat boiler is also lower to the recovery rate of sintering ore cooling waste gas low temperature exhaust heat.Although present sintering ore cooling waste gas low-temperature cogeneration system has all adopted dual pressure system, but the actual efficiency of thermal cycle of sintering ore cooling waste gas low pressure afterheat generating system has only 23%-28%, the recovery rate of sintering ore cooling waste gas low temperature exhaust heat is had only about 60%, therefore, comprehensive thermoelectrical efficiency (thermoelectrical efficiency=heat recovery rate * efficiency of thermal cycle) has only 13.8%-16.8%.Moreover these data are not also considered outage rate, low-load rate, the low service system failure rate of sintering ore cooling waste gas low-temperature cogeneration system.
According to above analysis, it still is not very perfect that known sintering ore cooling waste gas low-temperature waste heat power reclaims technology itself, it is low to exist heat recovery rate and efficiency of thermal cycle, problems such as power generation system poor stability have seriously restricted the Economy that the sintering ore cooling waste gas low-temperature waste heat power reclaims technology.According to theoretical calculation; the ton sintering ore cooling waste gas carries the low temperature exhaust heat amount and is converted to electric weight and can reaches 150-200KWh; and the theoretical annual mean ton sintering ore cooling waste gas power recovery amount of known sintering ore cooling waste gas low pressure afterheat generating system has only 15-18KWh; after the outage rate of consideration sintering ore cooling waste gas low-temperature cogeneration system, low-load rate, the low service system failure rate, above-mentioned power recovery amount also can descend to some extent.
Summary of the invention:
The present invention is intended to solve the defective of prior art, and a kind of sintering ore cooling waste gas full combustion-supporting generating set that can increase substantially sintering ore cooling waste gas low-temperature cogeneration system heat recovery rate, efficiency of thermal cycle and power generation system stability is provided.
The technological scheme that the present invention addresses the above problem employing is: a kind of sintering ore cooling waste gas full combustion-supporting generating set, comprise the fuel system that constitutes conventional fuel boiler power generation system, electricity generation boiler, steam turbine, generator, vapour condenser, circulating water pump, cooling tower, small pump, condensate pump, low-pressure heater, oxygen-eliminating device, feed water pump, induced draught fan, chimney, it also comprises sintering ore cooling waste gas trap and waste gas pressurizer, described sintering ore cooling waste gas trap places the sintering machine top, its exhaust output tube road is connected in the electricity generation boiler firing chamber, and this exhaust output tube road is provided with the waste gas pressurizer.
The present invention compared with prior art, its outstanding technical advantage has:
1. the heat recovery rate of sintering ore cooling waste gas can increase substantially.
In the pure combustion blast furnace gas power generation system of routine, the combustion-supporting air that enters system is the air under the ambient temperature, and the heat that products of combustion obtains all is the chemical heat from fuel basically.In the present invention, the sintering cooled exhaust air that will have a large amount of sensible heats is directly sent in the boiler combustion-supporting.Then under the certain situation of working medium caloric receptivity, the whole physics sensible heats that are equivalent to carry with waste gas substitute the chemical heat of part blast furnace gas.Therefore, sintering cooling waste gas full combustion-supporting power generation system can all be recycled the sintering ore cooling waste gas low temperature exhaust heat, so technology of the present invention can bring up to 100% with the heat recovery rate.
2. the waste heat grade of tying the ore deposit cooled exhaust air can increase substantially.
Sintering ore cooling waste gas all is used for combustion-supporting, can make the theoretical temperature combustion of fuel improve about 150 ℃, promptly by combustion process, low-grade sintering ore cooling waste gas waste heat is converted into high-grade products of combustion sensible heat.According to the engineering thermodynamics principle as can be known, the grade of heat energy is relevant with temperature, and temperature is high more, and fire is with high more, and the heat energy grade is high more.
3. the basic Lang Ken cycle efficiency of power generation system increases substantially.
Known pure low-temperature cogeneration circuit circulation poor quality, basic Lang Ken cycle efficiency generally has only 23%-25%.In the sintering ore cooling waste gas full combustion-supporting power generation system, because the thermodynamic cycle that sintering waste heat has entered the conventional power generation usage system, so waste heat is changed to electric energy with the efficiency of thermal cycle of conventional power generation usage system, therefore, in the invention system, the basic Lang Ken cycle efficiency of waste heat can reach more than 35%, improves 10%-13% than known pure low-temperature cogeneration circuit cycle efficiency.
4. can save huge one-time investment and valuable land resources.
The essence of sintering ore cooling waste gas full combustion-supporting power generation system is that pure low-temperature cogeneration system and the coupling of conventional fuel power generation system that will split become single power generation system, compare with original separately placed type power generation system, the present invention has cancelled the nearly all equipment such as exhaust heat boiler, steam turbine, generator, oxygen-eliminating device, various pump class, carbonated drink pipe network, water-treating equipment, electrical distribution system and control corresponding system that are used for the working medium power generation cycle in the former pure low-temperature cogeneration system.So sintering cooling waste gas full combustion-supporting power generation system can be saved the one-time investment expense of almost whole pure low-temperature cogeneration system, the amount of economizing on the use of funds is very huge.Simultaneously, the merging of two cover systems can be saved the land resources and the civil engineering costs of plant area's preciousness.
5. can reduce the operating cost of power generation system significantly.
The sintering ore cooling waste gas full combustion-supporting electrification technique as well as is compared with the separately placed type electrification technique as well as, when adopting high-temperature air combustion promoter can save a large amount of fuel costs, by the decline of exhaust gas volumn and the reduction of air consumption coefficient, boiler exhaust gas thermal loss and heat loss due to unburned gas are reduced, improve boiler thermal output, further reduced fuel consumption.According to measuring and calculating, reclaim entirely in the combustion-supporting power generation system of coupling at the sintering ore cooling waste gas low temperature exhaust heat, the fuel consumption ratio of boiler can reduce about 15% with the fuel consumption of the conventional pure blast furnace gas boiler of capacity.In addition, in the sintering ore cooling waste gas full combustion-supporting power generation system, cancelled all water pumps of former pure low-temperature cogeneration system, and the power of the water pump of pure blast furnace gas power generation system does not have substantially to change, be equivalent to the power consumption of all water pumps of pure low-temperature cogeneration system is saved.Therefore, invented technology reduces significantly than the operating cost of separately placed type electrification technique as well as.
6. can reduce the administration expenses of power generation system significantly.
Compare with the separately placed type power generation system, two cover power generation systems are merged into a cover system, and production, management position are provided with and can suitably merge, and administration expenses reduce significantly.
According to above-mentioned technical advantage analysis, the present invention merges by the coupling to the system of splitting, can save the land resources of huge one-time investment and plant area's preciousness, degree reduces operating cost, administration expenses significantly, farthest improve Economy, stability, the Security of power generation system, and reduce the accident rate of system significantly.According to calculating, same waste heat quantity and grade, the generated energy of waste heat in system of the present invention is higher about 3 times than the generated energy in known pure low-temperature cogeneration circulation.Therefore, the present invention can be enterprise and creates great economic benefit, for national energy-saving and emission-reduction cause is made major contribution.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Among the figure: sintering machine 1, exhaust gas collector 2, waste gas pressurizer 3, fuel system 4, electricity generation boiler 5, steam turbine 6, generator 7, vapour condenser 8, circulating water pump 9, cooling tower 10, small pump 11, condensate pump 12, low-pressure heater 13, oxygen-eliminating device 14, feed water pump 15, induced draught fan 16, chimney 17.
Embodiment:
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Referring to Fig. 1, a kind of sintering ore cooling waste gas full combustion-supporting generating set is made up of conventional fuel boiler power generation system and sintering ore cooling waste gas collecting system.
Conventional fuel boiler power generation system is made of fuel system 4, electricity generation boiler 5, steam turbine 6, generator 7, vapour condenser 8, circulating water pump 9, cooling tower 10, small pump 11, condensate pump 12, low-pressure heater 13, oxygen-eliminating device 14, feed water pump 15, induced draught fan 16, chimney 17.
The sintering ore cooling waste gas collecting system is made of sintering machine 1, exhaust gas collector 2, waste gas pressurizer 3.
In this device, exhaust gas collector 2 places sintering machine 1 top, and its exhaust output tube road is connected in the firing chamber of the electricity generation boiler 5 of conventional fuel boiler power generation system, on this exhaust output tube road waste gas pressurizer 3 is housed.The sintering deposit bed of material that cool air passes in the sintering machine 1 forms the sintering ore cooling waste gas with uniform temperature, collect the sintering ore cooling waste gas that is carrying a large amount of waste heats through exhaust gas collector 2, again after 3 pressurizations of waste gas pressurizer, carrying the fuel of coming to be delivered in the burner hearth of electricity generation boiler 5 with fuel system 4 burns, products of combustion is respectively organized heating surface (burner hearth electricity generation boiler 5, superheater, economizer) in to the cycle fluid release heat, enter gas preheating device preheating gas then, form smoke evacuation at last, smoke evacuation is introduced chimney 17 by induced draught fan 16 and is entered atmosphere.
In this device, cycle fluid is under the effect of feed water pump 15, enter in the electricity generation boiler 5, respectively organizing therein absorbs the main steam that preheating heat, vaporization heat, overheated thermosetting have certain acting ability in the heating surface, main steam enters steam turbine 6 acting of expanding, the heat energy that steam is carried changes the mechanical energy of steam turbine rotor into, in order to reduce the cold source energy of power generation cycle, draw gas (its objective is the backheat heating is carried out in feedwater) in appropriate location at steam turbine 6, steam acting the finishing back after the main steam deduction draws gas forms exhaust steam.Simultaneously, change the mechanical energy of steam turbine rotor into electric energy with the coaxial generator 7 of steam turbine 6, and give the power transformation system power delivery.Exhaust steam is left steam turbine 6 and is entered vapour condenser 8, and in vapour condenser 8, exhaust steam forms condensed water after recirculated cooling water is emitted the latent heat of vaporization, and condensed water leaves vapour condenser 8 under the effect of condensate pump 12.Circulating water enters cooling tower 10 absorb the latent heat of vaporization of exhaust steam in vapour condenser 8 after under the effect of circulating water pump 9, institute's caloric receptivity is discharged in the environment, enters vapour condenser 8 heat absorptions afterwards once more, carries out cool cycles next time.The condensed water that leaves vapour condenser 8 at first mixes with moisturizing and enters low-pressure heater 13 then, mixing water mixes with low pressure steam from steam turbine 6 low-pressure pumping steam mouths in low-pressure heater 13 and enters 14 kinds of deoxygenations of oxygen-eliminating device after heating up, the deoxygenation thermal source is for from the bleeding of steam turbine 6, and the oxygen-removing water that oxygen content is qualified enters electricity generation boiler 5 once more and carries out the next one thermodynamic cycle of generating electricity under the effect of boiler feed pump 15.
Claims (1)
1. sintering ore cooling waste gas full combustion-supporting generating set, comprise the fuel system that constitutes conventional fuel boiler power generation system, electricity generation boiler, steam turbine, generator, vapour condenser, circulating water pump, cooling tower, small pump, condensate pump, low-pressure heater, oxygen-eliminating device, feed water pump, induced draught fan, chimney, it is characterized in that, it also comprises sintering ore cooling waste gas trap and waste gas pressurizer, described sintering ore cooling waste gas trap places the sintering machine top, its exhaust output tube road is connected in the electricity generation boiler firing chamber, and this exhaust output tube road is provided with the waste gas pressurizer.
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| CN200910223749A CN101699038A (en) | 2009-11-19 | 2009-11-19 | Sintering ore cooling waste gas full combustion-supporting generating set |
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| CN200910223749A CN101699038A (en) | 2009-11-19 | 2009-11-19 | Sintering ore cooling waste gas full combustion-supporting generating set |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589305A (en) * | 2012-02-24 | 2012-07-18 | 思安新能源股份有限公司 | Sintering waste heat generating system |
| CN102840573A (en) * | 2011-06-24 | 2012-12-26 | 同方节能工程技术有限公司 | Water replenishing preheating system of thermal power plant |
| CN103017132A (en) * | 2013-01-06 | 2013-04-03 | 徐海军 | Electric steam boiler system |
| CN116747658A (en) * | 2023-08-16 | 2023-09-15 | 华能太原东山燃机热电有限责任公司 | Boiler waste gas treatment device of gas power plant |
-
2009
- 2009-11-19 CN CN200910223749A patent/CN101699038A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840573A (en) * | 2011-06-24 | 2012-12-26 | 同方节能工程技术有限公司 | Water replenishing preheating system of thermal power plant |
| CN102589305A (en) * | 2012-02-24 | 2012-07-18 | 思安新能源股份有限公司 | Sintering waste heat generating system |
| CN103017132A (en) * | 2013-01-06 | 2013-04-03 | 徐海军 | Electric steam boiler system |
| CN103017132B (en) * | 2013-01-06 | 2014-11-05 | 徐海军 | Electric steam boiler system |
| CN116747658A (en) * | 2023-08-16 | 2023-09-15 | 华能太原东山燃机热电有限责任公司 | Boiler waste gas treatment device of gas power plant |
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| ASS | Succession or assignment of patent right |
Owner name: TANGSHAN IRON AND STEEL GROUP CO., LTD. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yuzhu Inventor after: Yu Yong Inventor after: Wang Zibing Inventor after: Zhao Bin Inventor after: Hu Changqing Inventor after: Sun Weihua Inventor after: Yan Yongxin Inventor after: Wang Baojun Inventor before: Zhang Yuzhu Inventor before: Wang Zibing Inventor before: Zhao Bin Inventor before: Hu Changqing Inventor before: Sun Weihua Inventor before: Yan Yongxin |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG YUZHU WANG ZIBING ZHAO BIN HU ZHANGQING SUN WEIHUA YAN YONGXIN TO: ZHANG YUZHU YU YONG WANG ZIBING ZHAO BIN HU ZHANGQING SUN WEIHUA YAN YONGXIN WANG BAOJUN |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20101122 Address after: Xinhua Xidao 063000 Hebei province Tangshan City Lunan District No. 46 Applicant after: Hebei Univ. of Science & Technology Co-applicant after: Tangshan Iron and Steel Group Co., Ltd. Address before: Xinhua Xidao 063000 Hebei province Tangshan City Lunan District No. 46 Applicant before: Hebei Univ. of Science & Technology |
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Open date: 20100428 |