CN107906971B - High, medium and low waste heat recycling system for solidification heat of blast furnace ore slag - Google Patents
High, medium and low waste heat recycling system for solidification heat of blast furnace ore slag Download PDFInfo
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- CN107906971B CN107906971B CN201711284871.0A CN201711284871A CN107906971B CN 107906971 B CN107906971 B CN 107906971B CN 201711284871 A CN201711284871 A CN 201711284871A CN 107906971 B CN107906971 B CN 107906971B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a high, middle and low waste heat recycling system for solidifying hot slag of a blast furnace, in particular to a high, middle and low waste heat recycling system for solidifying hot slag of a blast furnace and a ferronickel smelting submerged arc furnace, belonging to the technical field of waste heat recycling of slag. The device comprises a blast furnace, an ore-smelting furnace, an integrated pagoda type spiral vaporization slag runner heat outlet device, a cyclone dust collector, a fin type waste heat boiler, a steam drum, a pulse bag filter type dust collector, a coiled pipe heat exchanger, a steam turbine, a generator, a distribution chamber and a condenser, wherein a crescent vaporization slag runner device with a spiral structure is arranged at the center of a slag discharging platform, and a fan-shaped blowing mechanism is arranged above a slag runner opening of the crescent vaporization slag runner device. The invention can recycle the waste heat of the blast furnace slag and the ferronickel dissolved ore smelting furnace slag to generate electricity and remove dust to pollutants in the recycling process, thereby meeting the environmental protection requirement and producing economic benefit by utilizing the slag.
Description
Technical Field
The invention relates to a high, middle and low waste heat recycling system for solidifying hot slag of a blast furnace, in particular to a high, middle and low waste heat recycling system for solidifying hot slag of a blast furnace and a ferronickel smelting submerged arc furnace, belonging to the technical field of waste heat recycling of slag.
Background
At present, due to the requirements on environment, energy conservation, cost reduction and the like, various iron and steel plants at home and abroad pay great attention to the research on the comprehensive utilization technology of secondary resources.
The blast furnace slag is a kind of slag discharged from a blast furnace when smelting pig iron. Due to the development of modern ore dressing and iron making technologies, the amount of blast furnace slag produced per ton of pig iron has been greatly reduced, and in general, the grade of furnace burden is 60% -66%, and 250-300kg of slag can be produced per 1t of pig iron. Because the blast furnace slag is produced in a large amount, if not well utilized, not only is the secondary resource wasted greatly, but also the pollution to the environment is great. Many iron and steel companies have studied the comprehensive utilization of blast furnace slag.
At present, dozens of countries in the world use blast furnace slag as a material, but the problem of recovering sensible heat is not solved, and currently, most blast furnaces use water slag flushing, and the sensible heat of the blast furnace slag is used for heating, power generation and the like. However, in summer and in the place where there is no heating facility, this energy is only wasted, and in the field of blast furnace waste heat recovery, sensible heat recovery of blast furnace slag is the last and greatest goal, but because of the specificity of blast furnace slag, it is difficult to solve this problem. Every 1t of pig iron is produced, 0.3-0.6 steel slag is produced as a byproduct, each ton of slag contains (126-188) x104Kj sensible heat, and the sensible heat corresponds to 30-40 Kg of heavy oil, and the sensible heat of the slag is high in energy value from the aspects of quantity and quality. The recovery of this part of waste heat can save a great deal of energy.
Since the 70 s of the 20 th century, some major steel-producing countries in the world, such as japan, united states, united kingdom, germany and sweden, have actively developed the utilization of slag resources for the purpose of energy conservation and environmental protection, and some countries have established specialized institutions for this purpose, such as the steel slag sensible heat comprehensive utilization technical commission in japan, and have also listed the slag comprehensive utilization technology as an important scientific subject for general production and conservation.
Blast furnace slag is a substance formed from gangue in iron ore, ash in fuel and non-volatile components in solvent (typically limestone), and its main components are calcium oxide, magnesium oxide, aluminum oxide, and silicon dioxide, accounting for about 95% of the total amount of blast furnace slag. The blast furnace slag belongs to silicate materials, has similar chemical composition to natural ore and silicate cement, and can replace natural rock and be used as cement production raw material. Domestic blast furnace slag will be mainly used as a cement raw material for a long period of time. At present, the blast furnace slag after water quenching treatment is used for preparing cement, and has the problems of high new water consumption, incapability of recovering physical heat of slag, and emission of pollutants such as sulfur dioxide, hydrogen sulfide and the like, so that the development trend of blast furnace slag treatment is to utilize sensible heat of slag efficiently while granulating slag by a dry method as a cement raw material.
Some researches have been made on heat recovery and dry granulation of blast furnace slag in China. 20. In the 50 th century, compressed air or high-pressure steam was introduced into a nozzle at the end of a blast furnace slag channel to directly blow slag into slag wool fibers without any tempering treatment. Although the method fully utilizes the sensible heat of slag, has low production cost and low price, the domestic blast furnace slag is alkaline slag and has short material property and is not suitable for direct fiber forming, so the diameter of the slag cotton fiber is short and thick, and the production and construction processes of the slag cotton fiber have serious environmental pollution and have been eliminated. Simulation experiments were carried out in the 80 s by the Pan Steel institute. At that time, a way was mainly found for titanium-containing blast furnace slag which could not be used as a cement raw material, and the titanium-containing slag treated by the dry method was crushed to a certain extent to produce slag sand for construction, irrespective of the glass phase (amorphous) content required as a cement raw material. Therefore, this work has only been done in part in laboratory with cold (paraffin) simulations, and has not been studied in depth. In view of the problems of the existing blast furnace slag treatment method and the current research situation of blast furnace slag dry granulation, a brand new blast furnace slag dry granulation and sensible heat recovery technology thereof needs to be developed, namely, granulated slag meets the requirements of slag cement and can efficiently recover slag sensible heat. The general idea is the current situation and development direction of blast furnace slag treatment and heat energy recovery by a method combining a rotating disc and air cooling.
In recent years, with the gradual expansion of the scale of laterite-ore pyrometallurgy of ferronickel alloys, the discharge amount of waste residues of laterite-nickel ore smelting (nickel-iron residues for short) is gradually increased. The yield of the nickel-iron alloy in 2011 in China is up to 25 ten thousand tons (nickel content), the accompanying solid waste slag is more than 1500 ten thousand tons, and in 2015, the total discharge amount of the nickel-iron slag is estimated to be close to one hundred million tons, exceeds the total discharge amount of metallurgical slag such as copper slag and manganese slag, and accounts for about one fifth of the total discharge amount of the metallurgical slag. Compared with other metallurgical slag, the nickel-iron slag has low recovery value and large slag discharge amount, and becomes a great difficulty in metallurgical slag treatment gradually. The piling and landfill of a large amount of electric furnace smelting nickel-iron slag not only occupies land and pollutes the environment, but also brings serious challenges to the sustainable development of the nickel-iron smelting. Therefore, the nickel iron smelting industry is urgently required to carry out comprehensive utilization research of a scientific system for solving the problem of open circuit of nickel iron smelting slag. The comprehensive utilization research of the ferronickel smelting waste slag provides a solid foundation for harmless and recycling treatment of a large amount of ferronickel smelting waste slag in the whole country and even the whole world.
Disclosure of Invention
The invention aims to overcome the defects, thereby providing a high, middle and low waste heat recycling system for solidifying hot blast furnace slag, which can recycle the waste heat of the blast furnace slag and ferronickel smelting furnace slag to generate electricity and remove dust from pollutants in the recycling process, thereby meeting the environmental protection requirement and producing economic benefit by utilizing the slag.
According to the technical scheme provided by the invention, the high, middle and low waste heat recycling system for solidifying heat of blast furnace ore-smelting furnace slag comprises a blast furnace, an ore-smelting furnace, an integrated pagoda type spiral vaporization slag runner heat outlet device, a cyclone dust collector, a fin type waste heat boiler, a steam drum, a pulse bag filter dust collector, a coiled pipe heat exchanger, a steam turbine, a generator, a distribution room and a condenser, wherein a slag conveying vehicle is arranged between the blast furnace, the ore-smelting furnace and the integrated pagoda type spiral vaporization slag runner heat outlet device, and is characterized in that slag produced by the blast furnace and the ore-smelting furnace is conveyed into the integrated pagoda type spiral vaporization slag runner heat outlet device by the slag conveying vehicle: the integrated pagoda type spiral vaporization slag runner heat remover comprises a guide rail type reinforced upright post, a lifting mechanism, a movable telescopic type large-sized traveling crane, a crescent type vaporization slag runner device, a fan-shaped blowing mechanism, a slag discharging platform, an air outlet and collecting bag of the vaporization slag runner device and an air inlet and collecting bag of the vaporization slag runner device, wherein the lifting mechanism is arranged right above the guide rail type reinforced upright post, the upper end of the guide rail type reinforced upright post is connected with the slag discharging platform, the movable telescopic type large-sized traveling crane is arranged at the upper end of the slag discharging platform, the crescent type vaporization slag runner device with a spiral structure is arranged at the center of the slag discharging platform, and the fan-shaped blowing mechanism is arranged above a slag runner opening of the crescent type vaporization slag runner device;
the side surface of the crescent vaporization slag runner device is connected with a plurality of vaporization slag runner device gas outlet gas collecting bags and vaporization slag runner device gas inlet gas collecting bags, and the vaporization slag runner device gas outlet gas collecting bags and the vaporization slag runner device gas inlet gas collecting bags are connected with the steam bag through gas pipes; the top of the crescent vaporization slag runner device is provided with a fume collecting hood, the fume collecting hood is connected with the air inlet end of the cyclone dust collector through a fume pipeline, the air outlet end of the cyclone dust collector is connected with the air inlet end of the fin type waste heat boiler, the air outlet end of the fin type waste heat boiler is connected with the air inlet end of the pulse bag type dust collector through a fume pipeline, and the air outlet end of the pulse bag type dust collector is connected with the coiled pipe heat exchanger through a pipeline; the low-temperature steam outlet end and the high-temperature steam inlet end of the fin type waste heat boiler are connected with the inlet and outlet ports of the steam wrap heat exchange tube through steam pipelines; the high-temperature steam outlet end of the steam bag is sequentially connected with a front sub-cylinder, a heat accumulator, a rear sub-cylinder, a steam-water separator and a steam turbine through a steam pipeline, the power output end of the steam turbine is connected with a generator, and the power output end of the generator is connected with a distribution room;
the steam outlet end of the steam turbine is connected with the steam inlet end of the condenser through a steam pipeline, and the steam outlet end of the condenser is connected with the heat exchange pipe port of the coiled pipe heat exchanger through a steam pipeline; the low-temperature steam inlet end of the steam bag is connected with the thermal deaerator through a steam pipeline, the thermal deaerator is connected with the water tank through a pipeline, a water tank water pump is arranged on a pipeline between the thermal deaerator and the water tank, and the thermal deaerator is connected with the heat exchange pipe port of the serpentine pipe heat exchanger through a pipeline.
Further, the slag runner cross section of the crescent vaporization slag runner device is arc-shaped, the slag runner of the crescent vaporization slag runner device comprises a water vapor collecting pipe layer, a circulating pipe layer and a wear-resistant protection layer which are sequentially arranged from outside to inside, a nitrogen nozzle is arranged on the surface of the wear-resistant protection layer, the tail end of the nitrogen nozzle is connected with a nitrogen pipe assembly, and the water vapor collecting pipe layer is communicated with an air outlet and collecting bag of the vaporization slag runner device and an air inlet and collecting bag of the vaporization slag runner device.
Further, the crescent vaporization slag runner device center is equipped with package flame retardant clay and leads to the post, and the package flame retardant clay leads to and leads to a post and set gradually a plurality of flame retardant clay reinforcing steel structures along the direction of height on the post, and flame retardant clay reinforcing steel structure supports and connects crescent vaporization slag runner device, and every layer flame retardant clay reinforcing steel structure department is equipped with the access door, is equipped with the maintenance elevator in the package flame retardant clay leads to the post.
Further, the bottom of crescent vaporization slag runner device is equipped with ventilation and releases the sediment hourglass head, and ventilation is released sediment hourglass head discharge end and is connected sediment ash conveying mechanism, and sediment ash conveying mechanism connects the ash bin feed end, is equipped with the cooling pipe in the ash bin, and the ash bin discharge end is equipped with the unloading truck.
Further, the air outlet of the slag ash conveying mechanism is connected with a main fan through an air pipe, and the main fan is connected with a serpentine pipe heat exchanger through the air pipe.
Further, a booster water pump is arranged on a pipeline between the air outlet gas collecting bag of the vaporization slag runner device and the air inlet gas collecting bag and the steam bag of the vaporization slag runner device.
Further, a condenser water pump is arranged on a steam pipeline between the condenser and the coiled pipe heat exchanger.
Further, an air outlet port of the crescent vaporization slag runner device is connected with a cooling fan through an air pipe, and the cooling fan is connected with a serpentine pipe heat exchanger through the air pipe.
Further, the inlet and outlet ends of the heat exchange tube of the condenser are connected with the inlet and outlet ends of the condensing tower through pipelines, and a condensing tower water pump is arranged on the pipeline between the condenser and the condensing tower.
Further, a steam pocket water pump is arranged on a pipeline between the steam pocket and the thermal deaerator.
Compared with the prior art, the invention has the following advantages:
the invention has simple, compact and reasonable structure, can recycle the waste heat of the blast furnace slag and the ferronickel smelting ore smelting furnace slag to generate electricity, and remove dust to pollutants in the recycling process, thereby not only meeting the environmental protection requirement, but also producing economic benefit by utilizing the slag.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is an enlarged view at a in fig. 1.
Fig. 3 is an enlarged view at B in fig. 1.
FIG. 4 is a cross-sectional view of the crescent vaporization slag runner apparatus of the present invention.
FIG. 5 is a front view of the crescent vaporization slag runner apparatus of the present invention.
Reference numerals illustrate: 1-blast furnace, 2-submerged arc furnace, 3-integral pagoda type spiral vaporization slag runner heat-discharging device, 4-guide rail type reinforced upright post, 5-lifting mechanism, 6-movable telescopic large-scale crane, 7-crescent vaporization slag runner device, 8-fan-shaped blowing mechanism, 9-slag discharging platform, 10-vaporization slag runner device air outlet gas collecting bag, 11-vaporization slag runner device air inlet gas collecting bag, 12-bag fire clay passing ceiling column, 13-fire clay reinforced steel structure, 14-access door, 15-access elevator, 16-fume collecting hood, 17-ventilation slag discharging head, 18-slag ash conveying mechanism, 19-cooling pipe, 20-ash bin, 21-discharging truck, 22-cyclone dust collector 23-fin type waste heat boiler, 24-steam drum, 25-thermal deaerator, 26-pulse bag filter type dust remover, 27-serpentine heat exchanger, 28-front air separating cylinder, 29-heat accumulator, 30-rear air separating cylinder, 31-steam-water separator, 32-steam turbine, 33-generator, 34-distribution room, 35-condenser, 36-condensing tower, 37-condenser water pump, 38-condensing tower water pump, 39-steam drum water pump, 40-water tank water pump, 41-water tank, 42-main fan, 43-cooling fan, 44-booster water pump, 45-water collecting steam pipe layer, 46-circulating pipe layer, 47-wear-resisting protective layer, 48-nitrogen nozzle and 49-nitrogen pipe assembly.
Detailed Description
The invention will be further described with reference to examples of embodiments in the accompanying drawings, in which:
as shown in fig. 1-3, the invention mainly comprises a blast furnace 1, a submerged arc furnace 2, an integrated pagoda type spiral vaporization slag runner heat outlet device 3, a cyclone dust collector 22, a fin type waste heat boiler 23, a steam drum 24, a pulse bag filter dust collector 26, a coiled pipe heat exchanger 27, a steam turbine 32, a generator 33, a distribution room 34 and a condenser 35.
A slag conveying vehicle is arranged among the blast furnace 1, the submerged arc furnace 2 and the integrated pagoda type spiral vaporization slag pit heat extractor 3, and conveys slag generated by the blast furnace 1 and the submerged arc furnace 2 into the integrated pagoda type spiral vaporization slag pit heat extractor 3.
The integrated pagoda type spiral vaporization slag runner heat outlet device 3 comprises a guide rail type reinforced upright post 4, a lifting mechanism 5, a movable telescopic large-sized traveling crane 6, a crescent vaporization slag runner device 7, a fan-shaped blowing mechanism 8, a slag discharging platform 9, an air outlet and collection bag 10 of the vaporization slag runner device and an air inlet and collection bag 11 of the vaporization slag runner device.
The lifting mechanism 5 is arranged right above the guide rail type reinforced upright post 4, the upper end of the guide rail type reinforced upright post 4 is connected with the slag discharging platform 9, the upper end of the slag discharging platform 9 is provided with the movable telescopic large-sized traveling crane 6, the center of the slag discharging platform 9 is provided with the crescent vaporization slag runner device 7 with a spiral structure, and the slag enters the crescent vaporization slag runner device 7 for heat dissipation and cooling.
As shown in fig. 4-5, the slag runner of the crescent vaporization slag runner device 7 is spirally distributed from top to bottom, the cross section of the slag runner of the crescent vaporization slag runner device 7 is arc-shaped, the slag runner of the crescent vaporization slag runner device 7 comprises a water-collecting steam pipe layer 45, a circulating pipe layer 46 and a wear-resistant protection layer 47 which are sequentially arranged from outside to inside, a nitrogen nozzle 48 is arranged on the surface of the wear-resistant protection layer 47, and the tail end of the nitrogen nozzle 48 is connected with a nitrogen pipe assembly 49. The vapor collecting pipe layer 45 is communicated with the vaporization slag pit device air outlet air collecting bag 10 and the vaporization slag pit device air inlet air collecting bag 11. Nitrogen in the nitrogen pipe assembly 49 is sprayed into the slag runner through the nitrogen nozzle 48 to blow hot gas in the upward direction of the fume collecting hood 16.
A fan-shaped blowing mechanism 8 is arranged above the slag runner opening of the crescent vaporization slag runner device 7, and the fan-shaped blowing mechanism 8 performs water spraying auxiliary cooling on slag in the slag runner. After being conveyed to the guide rail type reinforced upright post 4, the slag is lifted to a slag discharging platform 9 by a lifting mechanism 5, then the slag is poured into a crescent vaporization slag runner device 7 by a movable telescopic large-scale crane 6, and a fan-shaped blowing mechanism 8 sprays water to cool the slag in a slag runner in the crescent vaporization slag runner device 7.
The center of the crescent vaporization slag runner device 7 is provided with a fire clay wrapping through column 12, a plurality of fire clay reinforcing steel structures 13 are sequentially arranged on the fire clay wrapping through column 12 along the height direction, and the fire clay reinforcing steel structures 13 are in supporting connection with the crescent vaporization slag runner device 7. An access door 14 is arranged at the position of each layer of fire clay reinforced steel structure 13, an access elevator 15 is arranged in the covered fire clay through post 12, and an access person can reach each layer of fire clay reinforced steel structure 13 for access after passing through the access elevator.
The side surface of the crescent vaporization slag runner device 7 is connected with a plurality of vaporization slag runner device air outlet and collection bags 10 and vaporization slag runner device air inlet and collection bags 11. The gasification slag runner device gas outlet gas collecting bag 10 and the gasification slag runner device gas inlet gas collecting bag 11 are connected with a steam bag 24 through gas pipes. A booster water pump 44 is arranged on the pipeline between the gasification slag runner device air outlet gas collecting bag 10, the gasification slag runner device air inlet gas collecting bag 11 and the steam drum 24.
The bottom of crescent vaporization slag runner device 7 is equipped with ventilation and puts sediment weeping head 17, and ventilation and put sediment weeping head 17 discharge end and connect sediment ash conveying mechanism 18, and sediment ash conveying mechanism 18 connects ash bin 20 feed end, is equipped with cooling tube 19 in the ash bin 20, and ash bin 20 discharge end is equipped with discharge truck 21. The ash slag generated in the crescent vaporization slag runner device 7 enters the air slag discharging leakage head 17, is conveyed into the ash bin 20 by the slag ash conveying mechanism 18, is cooled again by the cooling pipe 19 in the ash bin 20, and is finally conveyed into the discharging truck 21.
The top of crescent vaporization slag runner device 7 is equipped with collection petticoat pipe 16, and collection petticoat pipe 16 passes through the gas piping connection cyclone 22's inlet end, and cyclone 22's end of giving vent to anger is connected fin formula exhaust-heat boiler 23 inlet end, and fin formula exhaust-heat boiler 23 gives vent to anger the end and passes through the gas piping connection pulse bag filter dust collector 26 inlet end, and pulse bag filter dust collector 26 gives vent to anger the end and passes through the pipe connection coiled pipe heat exchanger 27. The high-temperature flue gas generated by the crescent vaporization slag runner device 7 is dedusted by a cyclone dust collector 22 and a pulse bag filter type dust collector 26.
The low-temperature steam outlet end and the high-temperature steam inlet end of the fin type waste heat boiler 23 are connected with the inlet and outlet ports of the heat exchange tube of the steam drum 24 through steam pipelines, high-temperature flue gas enters the fin type waste heat boiler 23 and then exchanges heat with steam, and the low-temperature steam is subjected to heat exchange in the fin type waste heat boiler 23 to become high-temperature steam which enters the steam drum 24.
The high-temperature steam outlet end of the steam drum 24 is sequentially connected with a front sub-cylinder 28, a heat accumulator 29, a rear sub-cylinder 30, a steam-water separator 31 and a steam turbine 32 through steam pipelines, the power output end of the steam turbine 32 is connected with a generator 33, and the power output end of the generator 33 is connected with a distribution room 34. The high-temperature flue gas generated in the crescent vaporization slag runner device 7 is subjected to heat exchange through the fin type waste heat boiler 23, the generated high-temperature steam enters the steam drum 24, then sequentially passes through the front air dividing cylinder 28, the heat accumulator 29, the rear air dividing cylinder 30 and the steam-water separator 31, and enters the steam turbine 32 to do work, so that the generator 33 is driven to generate electricity, and the generated electricity is distributed by the distribution room 34. The low-temperature steam in the steam drum 24 enters the slag runner of the crescent-shaped vaporization slag runner device 7, and the high-temperature steam generated by heating the hot slag in the slag runner of the crescent-shaped vaporization slag runner device 7 returns to the steam drum 24 again.
The steam outlet end of the steam turbine 32 is connected with the steam inlet end of the condenser 35 through a steam pipeline, the steam outlet end of the condenser 35 is connected with the heat exchange pipe port of the coiled pipe heat exchanger 27 through a steam pipeline, and a condenser water pump 37 is arranged on the steam pipeline between the condenser 35 and the coiled pipe heat exchanger 27. The inlet and outlet ends of the heat exchange tubes of the condenser 35 are connected with the inlet and outlet ends of the condensing tower 36 through pipelines, and a condensing tower water pump 38 is arranged on the pipeline between the condenser 35 and the condensing tower 36. The low-temperature steam generated by the steam turbine 32 sequentially enters a condenser and a condensing tower for cooling.
The low-temperature steam inlet end of the steam drum 24 is connected with the thermal deaerator 25 through a steam pipeline, a steam drum water pump 39 is arranged on a pipeline between the steam drum 24 and the thermal deaerator 25, the thermal deaerator 25 is connected with a water tank 41 through a pipeline, and a water tank water pump 40 is arranged on a pipeline between the thermal deaerator 25 and the water tank 41. The thermal deaerator 25 is connected with the heat exchange tube port of the serpentine tube heat exchanger 27 through a pipeline.
The air outlet of the slag ash conveying mechanism 18 is connected with a main fan 42 through an air pipe, and the main fan 42 is connected with the serpentine heat exchanger 27 through an air pipe. The air outlet of the crescent vaporization slag runner device 7 is connected with a cooling fan 43 through an air pipe, and the cooling fan 43 is connected with the serpentine heat exchanger 27 through an air pipe.
The cyclone dust collector 22 is a high-temperature resistant centrifugal cyclone dust collector, and the pulse bag filter dust collector 26 is a powerful ash-cleaning type high-temperature low-pressure off-line pulse bag filter dust collector.
The working principle of the invention is as follows: when the main fan of the dust removal system works, high-temperature flue gas is brought out by ventilation, slag discharging and head leakage to an integrated pagoda type spiral vaporization slag runner heat outlet device, then enters a fin type waste heat boiler system to generate steam after coarse dust removal by a high-temperature-resistant centrifugal cyclone dust remover, and the temperature of the flue gas is reduced to meet the condition of entering a powerful ash removal type high-temperature low-pressure off-line pulse bag dust remover for fine dust removal, and the flue gas with residual temperature after fine dust removal passes through a serpentine pipe heat exchanger and mainly acts on heating the condensed sewage of a steam turbine.
The invention also comprises a waste heat system which generates two paths of waste heat: one path of fin type waste heat boiler is generated, and the other path of crescent vaporization slag runner device is generated. The fin type waste heat boiler is characterized in that high-temperature hot flue gas enters a steam drum to separate steam from water under the action of steam heat lifting force generated after radiation heat exchange and convection heat exchange of the waste heat boiler, enters a front air dividing cylinder to balance pressure, enters a heat accumulator to store steam energy, enters a rear air dividing cylinder to balance pressure, enters a steam-water separator to separate water, steam enters a steam turbine to do work, the steam doing work is condensed into water by a condenser, condensed water is pumped into a coiled pipe heat exchanger to exchange heat under the action of a circulating water pump, the condensed water is heated, a thermal deaerator enters and exits to thermally deoxidize, deoxidized water is pumped into the steam drum through a circulating water pump, and hot water is sent into the fin type waste heat boiler to heat under the action of gravity, so that the whole process is circulated. Crescent vaporization slag runner device: hot water in the steam drum is pumped into a crescent vaporization slag runner air inlet steam collecting drum and a crescent vaporization slag runner water collecting pipe through a pressurizing circulating water pump to perform split-flow heat exchange, so that steam is generated and is sent into the steam drum after passing through the water collecting pipe to the crescent vaporization slag runner air outlet steam collecting drum, and the steam is sent to a steam turbine to perform work. The invention also comprises a waste heat power generation system, and a steam turbine of the waste heat power generation system drives a generator to generate electricity to enter a distribution room and then to be connected with each power utilization unit. The invention also comprises a turbine cooling system, the turbine cooling system carries out steam-water heat exchange on low-pressure steam from the turbine through a condenser, the heat exchanged water with temperature is pumped into a cooling tower through a circulating water pump to cool the water, and heat is discharged from the air. The invention also comprises an ash conveying system, wherein hot slag from the blast furnace and the submerged arc furnace is conveyed to the middle of the upper and lower guide rail type reinforced upright post through the blast furnace slag filling vehicle and the submerged arc slag filling vehicle and is positioned and hooked; lifting the slag pot to a slag discharging platform through a reinforced lifting device, pouring the slag into a crescent vaporization slag runner device through a movable telescopic type traveling crane to cool the slag, simultaneously enabling a fan-shaped blowing device to enter and exit for auxiliary heat dissipation, cooling the slag to a ventilation slag discharging leakage head, and then to a conveying system, a cooling pipe, an ash bin and a discharging truck. The air path system of the invention has two paths, one path is a fan-shaped blowing device, clean air after dust removal is conveyed to the fan-shaped blowing device through an air blowing pipeline under the action of a cooling fan to blow out hot air; the other path is a nitrogen pipe assembly, and the nitrogen nozzle always sprays nitrogen from the nozzle through the nitrogen pipe and blows out hot gas through the anti-sticking wear-resistant protective layer and the liquid steel slag.
Claims (7)
1. The utility model provides a hot high low waste heat recovery system of blast furnace ore deposit heat slag solidification, including blast furnace (1), hot stove in ore deposit (2), integrative pagoda formula spiral vaporization slag runner goes out hot ware (3), cyclone (22), fin formula exhaust-heat boiler (23), steam pocket (24), pulse bag filter dust collector (26), coiled pipe heat exchanger (27), steam turbine (32), generator (33), electricity distribution room (34), condenser (35), be equipped with the slag delivery wagon between blast furnace (1), hot stove in ore deposit (2) and integrative pagoda formula spiral vaporization slag runner goes out hot ware (3), slag delivery wagon carries the slag that blast furnace (1) and hot stove in (2) produced integrative pagoda formula spiral vaporization slag runner goes out hot ware (3), characterized by: the integrated pagoda type spiral vaporization slag runner heat remover (3) comprises a guide rail type reinforced upright post (4), a lifting mechanism (5), a movable telescopic large-sized crane (6), a crescent vaporization slag runner device (7), a fan-shaped blowing mechanism (8), a slag discharging platform (9), a vaporization slag runner device air outlet gas collecting bag (10) and a vaporization slag runner device air inlet gas collecting bag (11), wherein the lifting mechanism (5) is arranged right above the guide rail type reinforced upright post (4), the upper end of the guide rail type reinforced upright post (4) is connected with the slag discharging platform (9), the movable telescopic large-sized crane (6) is arranged at the upper end of the slag discharging platform (9), the crescent vaporization slag runner device (7) with a spiral structure is arranged at the center of the slag discharging platform (9), and the fan-shaped blowing mechanism (8) is arranged above a slag runner opening of the crescent vaporization slag runner device (7);
the side surface of the crescent vaporization slag runner device (7) is connected with a plurality of vaporization slag runner device air outlet gas collecting bags (10) and vaporization slag runner device air inlet gas collecting bags (11), and the vaporization slag runner device air outlet gas collecting bags (10) and the vaporization slag runner device air inlet gas collecting bags (11) are connected with a steam bag (24) through air pipes; the top of the crescent vaporization slag runner device (7) is provided with a fume collecting hood (16), the fume collecting hood (16) is connected with the air inlet end of a cyclone dust collector (22) through a fume pipeline, the air outlet end of the cyclone dust collector (22) is connected with the air inlet end of a fin type waste heat boiler (23), the air outlet end of the fin type waste heat boiler (23) is connected with the air inlet end of a pulse bag type dust collector (26) through a fume pipeline, and the air outlet end of the pulse bag type dust collector (26) is connected with a coiled pipe heat exchanger (27) through a pipeline; the low-temperature steam outlet end and the high-temperature steam inlet end of the fin type waste heat boiler (23) are connected with the inlet and outlet ports of the heat exchange tubes of the steam drum (24) through steam pipelines; the high-temperature steam outlet end of the steam drum (24) is sequentially connected with a front sub-cylinder (28), a heat accumulator (29), a rear sub-cylinder (30), a steam-water separator (31) and a steam turbine (32) through a steam pipeline, the power output end of the steam turbine (32) is connected with a generator (33), and the power output end of the generator (33) is connected with a distribution room (34);
the steam outlet end of the steam turbine (32) is connected with the steam inlet end of the condenser (35) through a steam pipeline, and the steam outlet end of the condenser (35) is connected with the heat exchange pipe port of the coiled pipe heat exchanger (27) through a steam pipeline; the low-temperature steam inlet end of the steam drum (24) is connected with the thermal deaerator (25) through a steam pipeline, the thermal deaerator (25) is connected with the water tank (41) through a pipeline, a water tank water pump (40) is arranged on a pipeline between the thermal deaerator (25) and the water tank (41), and the thermal deaerator (25) is connected with the heat exchange pipe end opening of the serpentine pipe heat exchanger (27) through a pipeline;
the slag runner cross section of the crescent vaporization slag runner device (7) is arc-shaped, the slag runner of the crescent vaporization slag runner device (7) comprises a water vapor collecting pipe layer (45), a circulating pipe layer (46) and a wear-resistant protection layer (47) which are sequentially arranged from outside to inside, a nitrogen nozzle (48) is arranged on the surface of the wear-resistant protection layer (47), the tail end of the nitrogen nozzle (48) is connected with a nitrogen pipe assembly (49), and the water vapor collecting pipe layer (45) is communicated with an air outlet and collecting bag (10) of the vaporization slag runner device and an air inlet and collecting bag (11) of the vaporization slag runner device;
the bottom of the crescent vaporization slag runner device (7) is provided with a ventilation slag discharge head (17), the discharge end of the ventilation slag discharge head (17) is connected with a slag ash conveying mechanism (18), the slag ash conveying mechanism (18) is connected with the feed end of an ash bin (20), a cooling pipe (19) is arranged in the ash bin (20), and the discharge end of the ash bin (20) is provided with a discharge truck (21);
the air outlet of the crescent vaporization slag runner device (7) is connected with a cooling fan (43) through an air pipe, and the cooling fan (43) is connected with a serpentine pipe heat exchanger (27) through an air pipe.
2. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: crescent vaporization slag runner device (7) center is equipped with package flame retardant clay and leads to post (12), and a plurality of flame retardant clay are strengthened steel construction (13) along the direction of height in proper order on the package flame retardant clay leads to post (12), and flame retardant clay is strengthened steel construction (13) and is supported and connect crescent vaporization slag runner device (7), and every layer flame retardant clay is strengthened steel construction (13) department and is equipped with access door (14), is equipped with in the package flame retardant clay leads to post (12) and overhauls elevator (15).
3. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: the air outlet of the slag ash conveying mechanism (18) is connected with a main fan (42) through an air pipe, and the main fan (42) is connected with a serpentine pipe heat exchanger (27) through an air pipe.
4. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: a booster water pump (44) is arranged on a pipeline among the gasification slag runner device air outlet gas collecting bag (10), the gasification slag runner device air inlet gas collecting bag (11) and the steam drum (24).
5. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: a condenser water pump (37) is arranged on a steam pipeline between the condenser (35) and the serpentine heat exchanger (27).
6. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: the inlet and outlet ends of the heat exchange tubes of the condenser (35) are connected with the inlet and outlet ends of the condensing tower (36) through pipelines, and a condensing tower water pump (38) is arranged on a pipeline between the condenser (35) and the condensing tower (36).
7. The blast furnace submerged arc furnace slag-solidifying heat high-middle-low waste heat recycling system according to claim 1, which is characterized in that: a steam ladle water pump (39) is arranged on a pipeline between the steam ladle (24) and the thermal deaerator (25).
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| CN108929925B (en) * | 2018-10-09 | 2020-04-21 | 青岛特殊钢铁有限公司 | High-temperature liquid blast furnace slag waste heat recovery device and waste heat recovery method thereof |
| CN109611210B (en) * | 2019-02-13 | 2024-03-15 | 国能南京电力试验研究有限公司 | Gas turbine inlet air temperature control system |
| CN111579710A (en) * | 2020-07-03 | 2020-08-25 | 国消(天津)检测技术有限公司 | Energy-saving and environment-friendly fire-fighting product fire resistance test system and test method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54161596A (en) * | 1978-06-12 | 1979-12-21 | Sumitomo Metal Ind Ltd | Heat recovering method for molten slag |
| CN202350559U (en) * | 2011-12-09 | 2012-07-25 | 昆明理工大学 | Organic working medium supercritical generating system utilizing blast furnace slag and slag washing water waste heat |
| CN102787187A (en) * | 2012-08-31 | 2012-11-21 | 上海宝钢节能技术有限公司 | System and method for generating power with blast-furnace slag washing water and exhaust steam low-temperature waste heat |
| CN203037088U (en) * | 2013-01-14 | 2013-07-03 | 南京圣诺热管有限公司 | Waste heat recovery device of high-temperature melted slag in water quenching method |
| JP2015178913A (en) * | 2014-03-18 | 2015-10-08 | 地方独立行政法人青森県産業技術センター | Slag heat recovering device, slag heat recovering method, and heat generating method |
| CN106834571A (en) * | 2017-01-20 | 2017-06-13 | 同济大学 | A kind of blast-furnace cement sensible heat reclaims slag cooler |
-
2017
- 2017-12-07 CN CN201711284871.0A patent/CN107906971B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54161596A (en) * | 1978-06-12 | 1979-12-21 | Sumitomo Metal Ind Ltd | Heat recovering method for molten slag |
| CN202350559U (en) * | 2011-12-09 | 2012-07-25 | 昆明理工大学 | Organic working medium supercritical generating system utilizing blast furnace slag and slag washing water waste heat |
| CN102787187A (en) * | 2012-08-31 | 2012-11-21 | 上海宝钢节能技术有限公司 | System and method for generating power with blast-furnace slag washing water and exhaust steam low-temperature waste heat |
| CN203037088U (en) * | 2013-01-14 | 2013-07-03 | 南京圣诺热管有限公司 | Waste heat recovery device of high-temperature melted slag in water quenching method |
| JP2015178913A (en) * | 2014-03-18 | 2015-10-08 | 地方独立行政法人青森県産業技術センター | Slag heat recovering device, slag heat recovering method, and heat generating method |
| CN106834571A (en) * | 2017-01-20 | 2017-06-13 | 同济大学 | A kind of blast-furnace cement sensible heat reclaims slag cooler |
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