CN112725554A - High-temperature liquid dilute slag air quenching granulation and waste heat recovery system - Google Patents
High-temperature liquid dilute slag air quenching granulation and waste heat recovery system Download PDFInfo
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- CN112725554A CN112725554A CN202110180717.9A CN202110180717A CN112725554A CN 112725554 A CN112725554 A CN 112725554A CN 202110180717 A CN202110180717 A CN 202110180717A CN 112725554 A CN112725554 A CN 112725554A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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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
- Y02P10/20—Recycling
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a high-temperature liquid dilute slag air quenching granulation and waste heat recovery system, which belongs to the field of high-temperature liquid dilute slag, and adopts the technical scheme that the system comprises a feeding device, an emergency cooling granulation device, a full waste heat recovery water vapor system, a constant-temperature flue gas filtering device and a fin waste heat recovery device; the feeding device comprises a feeding groove, the rapid cooling granulation device comprises a storage bin, the feeding groove is formed in the side wall of the storage bin, the rapid cooling granulation device is communicated with the full waste heat recovery water vapor system through a plurality of connecting pipes, and the full waste heat recovery water vapor system recovers waste heat in molten slag.
Description
Technical Field
The invention relates to the technical field of high-temperature liquid dilute slag, in particular to a high-temperature liquid dilute slag air granulation and waste heat recovery system.
Background
Blast furnace slag containing huge heat is generated in the process of smelting pig iron. The tapping temperature of the blast furnace slag is generally 1400-1550 ℃, each ton of slag contains 1260-1880 multiplied by 103kJ sensible heat, which is equivalent to 60kg of standard coal. Under the existing smelting technology in China, 0.3 ton of blast furnace slag is produced as a byproduct for producing 1 ton of pig iron, the blast furnace slag with the pig iron yield of 8.09 million tons in China in 2019 can be folded to produce more than 2.43 million tons of blast furnace slag, and the sensible heat of the blast furnace slag is equivalent to 1458 ten thousand tons of standard coal.
The dry slag pit cooling method and the water slag flushing method are the most common blast furnace slag treatment methods in China at present. The dry slag pit cooling method directly discharges high-temperature liquid slag into a dry slag pit for air cooling and auxiliary water cooling. When the method is used for cooling, a large amount of water vapor is generated, and a large amount of H is released simultaneously2S and SO2Gases, corrosion of buildings, destruction of equipment and deterioration of the working environment, which is generally used only in the event of accident. 90% of blast furnace slag in China is treated by a water flushing slag method. The slag flushing method is that low-temperature cooling water is directly mixed with high-temperature liquid slag, so that the temperature of the liquid slag is rapidly reduced and vitreous slag particles are formed. The water-slag-flushing method can be divided into a Ciba method, a Tura method, a bottom filtration method, a Lasa method and a Mintck method according to different process flows. Although the water-jet process is continuously developed, the core of the technology is to spray water and quench high-temperature liquid slag to achieve the purposes of cooling and granulating, then carry out water-slag separation, and recycle the water for slag flushing after precipitation and filtration, but the treatment process wastes a large amount of water resources and generates H2S and SO2And the harmful gases cause serious smoke plume problems, and high-quality waste heat resources contained in the high-temperature liquid slag cannot be effectively recovered.
The necessity of utilizing the heat energy of the high-temperature slag is mainly reflected in energy conservation and emission reduction, energy waste is reduced, meanwhile, great comprehensive benefits are achieved in the aspects of environmental protection and the like, the sensible heat of the blast furnace slag, the converter slag, the electric furnace slag and the like is recovered with high quality and high efficiency, the sensible heat can also become an important means for reducing comprehensive energy consumption of iron and steel enterprises, and low-carbon economy is achieved while great economic benefits are brought to the enterprises.
The high-temperature liquid diluted slag is a byproduct generated in the steel-making process, and the treatment method of the high-temperature liquid diluted slag mainly comprises the following steps: the cold discard method, the hot pour method, the disc water cooling method, the water quenching method, the air quenching method, the slag smoldering method, and the like, which are all techniques of cooling, solidifying and granulating the molten steel slag by using air and water. Therefore, the heat energy of the steel slag is completely released into the air and cannot be recycled, so that the environment is polluted and energy waste is caused.
In summary, the treatment process commonly adopted by the high-temperature liquid diluted molten slag at present not only wastes all high-quality waste heat resources contained in the high-temperature liquid molten slag, but also consumes a large amount of water resources, and causes serious pollution to the environment, and the treatment modes are not suitable for the urgent requirements of energy conservation and emission reduction in the steel industry at present. An efficient and pollution-free new technology must be found for effectively recovering the blast furnace slag waste heat resources.
With the continuous development of the steel industry, the production amount of steel slag is continuously increased. Therefore, the improvement of the capability and the technical level of steel slag treatment is not only an important content of national energy conservation and emission reduction and circular economy, but also 1 important measure of improving the steelmaking production capability, reducing the smelting cost and realizing the comprehensive utilization of the steel slag.
Disclosure of Invention
The invention aims to provide a high-temperature liquid dilute slag air quenching granulation and waste heat recovery system, which is used for carrying out gas-solid separation on high-temperature liquid dilute slag, and on one hand, filtering, purifying and recycling waste heat on high-temperature flue gas; on the other hand, the slag is cooled, wind quenching is assisted on the basis of centrifugal treatment, and the slag is crushed by using mechanical force and wind power at the same time, so that the defects of high energy consumption and large wind quantity of a pure wind quenching and granulating process are avoided, and the vitrification rate of the slag after quenching and granulating is effectively improved; and the heat of the high-temperature liquid dilute slag is replaced by the internal energy of the flue gas, the heat energy utilization rate of the slag is improved, the slag waste heat can be used for power generation, and can also be used in the fields of heat supply, water supply, gas supply and the like of a waste heat boiler, so that the recycling of clean energy is really realized, and the purposes of energy conservation and environmental protection are achieved.
The technical purpose of the invention is realized by the following technical scheme:
a high-temperature liquid dilute slag air quenching granulation and waste heat recovery system comprises a feeding device, an air quenching granulation device, a full waste heat recovery water vapor system, a constant-temperature flue gas filtering device and a fin waste heat recovery device; the feeding device comprises a feeding groove, the quenching and granulating device comprises a storage bin, the feeding groove is arranged on the side wall of the storage bin, and the molten slag enters the storage bin through the feeding groove; the upper part of the storage bin is communicated with a vaporization cooling flue, and flue gas in the molten slag enters a constant-temperature flue gas filtering device through the vaporization cooling flue; the upper part of the high-temperature flue gas filtering device is connected with a gas conveying pipe, and the filtered flue gas enters the fin waste heat recovery device through the gas conveying pipe; the quenching and granulating device is communicated with a full waste heat recovery water vapor system through a plurality of connecting pipes, and the full waste heat recovery water vapor system recovers waste heat in the molten slag.
Further, the feeding device comprises a double-station pouring device and a granulating and blowing device; the double-station pouring device is arranged at the upper part of the feed chute and is used for conveying molten slag into the feed chute; the granulation blowing device is arranged below the feeding groove and used for blowing compressed nitrogen or compressed air into the storage bin.
Further, the storage bin comprises a fluidized cooling bed device and a uniform discharging device, the fluidized cooling bed device is positioned below the feeding chute in the storage bin, and the fluidized cooling bed device comprises an air distribution assembly, a high-pressure air blower communicated with the air distribution assembly and a high-pressure evaporator arranged below the air distribution assembly; the uniform discharging device is arranged at the bottom of the storage bin, a discharging hopper and a vibrating screen are arranged below the uniform discharging device, and the vibrating screen is arranged below the discharging hopper.
Further, the gas distribution assembly comprises a main gas inlet pipe, a distribution gas pipe, branch gas pipes and gas nozzles, the main gas inlet pipe is communicated with the outlet of the high-pressure air blower, the distribution gas pipe is communicated with the main gas inlet pipe, the branch gas pipes are provided with a plurality of gas inlets, one end of each branch gas pipe is communicated with the distribution gas pipe, the branch gas pipes are arranged in parallel, and the branch gas pipes are provided with a plurality of gas nozzles.
Further, the uniform discharging device comprises bin bottom plates, chute sections and bottom supporting plates, wherein the bin bottom plates are arranged in a gap mode, the bottom supporting plates are connected to the lower portions of the gaps of the two bin bottom plates, the chute sections are connected between the bin bottom plates and the bottom supporting plates, boosting nozzles are arranged on the bottom supporting plates in a penetrating mode, the lower ends of the boosting nozzles are connected with boosting air pipes, and the boosting air pipes are communicated with an external air supply system.
Furthermore, a coarse material hopper and a fine material pneumatic conveying and sending device are respectively arranged below the vibrating screen.
Further, constant temperature flue gas filter equipment includes the casing, sets up phase change heat accumulation stick, the ash bucket of setting in the casing lower part at casing middle part, air inlet, gas outlet have been seted up on the casing, the air inlet is seted up on the casing, the gas outlet sets up on casing upper portion, and the flue gas discharges along the gas outlet after filtering, then gets into fin waste heat recovery device.
Furthermore, be provided with the deashing pipe in the casing, the deashing pipe is located phase transition heat accumulation stick top, the one end and the outside air supply system intercommunication of deashing pipe, the intercommunication has a plurality of deashing shower nozzles on the deashing pipe.
Furthermore, the full waste heat recovery water vapor system is connected with a high-pressure steam drum, a heat accumulator, a low-pressure steam drum, a water diversion header, a pressure pump, a deaerator and a soft water tank through pipelines, a gas mixture enters the high-pressure steam drum, and steam enters the heat accumulator after the steam-water separation of the high-pressure steam drum.
In conclusion, the invention has the following beneficial effects:
1. the system effectively improves the waste heat recovery efficiency, and the molten slag is easy to use due to high temperature and high energy level, firstly, the double-station pouring device pours the molten slag into the storage bin, the granulating and blowing device carries out centrifugal granulation on the molten slag, and meanwhile, the air quenching is added for cooling treatment, so that on one hand, the hot slag of a vitreous body is prevented from being sticky, and meanwhile, the quenching effect can be effectively strengthened to ensure the crystal quality of the granulated slag; the hot slag materials are discharged uniformly through the uniform discharging device, so that the hot slag in the whole storage bin is discharged uniformly, the temperature balance of each layer section area in the storage bin is ensured, and high-efficiency heat exchange is facilitated;
2. the constant-temperature flue gas filtering device in the system is arranged, high-temperature flue gas passes through the device, the device effectively filters and purifies the flue gas, the phase-change heat storage rod absorbs heat of the high-temperature flue gas by generating phase change, when the temperature in the device is lower than a set high-temperature section, the phase-change heat storage rod generates phase change to emit heat and ensures that the temperature in the device is constant in the high-temperature section, so that the phenomenon that the phase-change heat storage rod is broken under the action of alternating thermal stress is avoided, the service life of the phase-change heat storage rod is effectively prolonged, the workload of daily maintenance and repair is reduced to the greatest extent, and the reliable and stable operation of the whole system is realized;
3. the system can save energy by 25-45kg of standard coal for each ton of high-temperature molten slag, does not spray water in the granulating process of the molten slag, basically eliminates the discharge of sulfide, and is an environment-friendly treatment process.
Drawings
FIG. 1 is a schematic view showing the overall structure of the system according to the embodiment;
FIG. 2 is an enlarged schematic structural view of a portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of a uniform discharge device in the embodiment;
FIG. 4 is a schematic structural diagram of an embodiment of an air distribution assembly;
FIG. 5 is a schematic structural diagram of a system for recovering water vapor by using full waste heat in the embodiment;
in the figure, 1, a feeding device; 101. a double-station pouring device; 102. a granulation blowing device; 2. a quenching and granulating device; 3. a full waste heat recovery water vapor system; 301. a high pressure steam drum; 302. a heat accumulator; 303. a low pressure steam drum; 304. a water diversion header; 305. a pressure pump; 306. a deaerator; 307. a soft water tank; 4. a constant temperature flue gas filtering device; 401. a housing; 402. a phase change heat storage rod; 403. an ash hopper; 5. a fin waste heat recovery device; 7. a feed chute; 8. a storage bin; 9. a vaporizing cooling flue; 10. a gas delivery pipe; 11. a connecting pipe; 12. a fluidized cooling bed device; 13. a uniform discharge device; 1301. a bin floor; 1302. a pipe sliding section; 1303. a bottom pallet; 14. a gas distribution assembly; 1401. a main air inlet pipe; 1402. distributing the air pipes; 1403. a branch air pipe; 1404. an air nozzle; 15. a high pressure blower; 16. a high pressure evaporator; 17. a discharge hopper; 18. a vibratory screen; 19. a coarse material hopper; 20. a fine material pneumatic conveying and sending device; 21. a boost nozzle; 22. boosting the air pipe; 23. an air inlet; 24. an air outlet; 25. a dust removal pipe; 26. a dust cleaning spray head.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example (b):
a high-temperature liquid dilute slag air quenching granulation and waste heat recovery system is shown in figures 1 and 5 and comprises a feeding device 1, an emergency cooling granulation device 2, a full waste heat recovery water vapor system 3, a constant-temperature flue gas filtering device 4 and a fin waste heat recovery device 5.
As shown in fig. 1 and 5, the feeding device 1 comprises a feeding chute 7, the quenching and granulating device 2 comprises a storage bin 8, the feeding chute 7 is arranged on the side wall of the storage bin 8, and the molten slag enters the storage bin 8 through the feeding chute 7. The upper part of the storage bin 8 is communicated with a vaporization cooling flue 9, flue gas in molten slag enters a constant-temperature flue gas filtering device 4 through the vaporization cooling flue 9, the upper part of the high-temperature flue gas filtering device is connected with a gas conveying pipe 10, the filtered flue gas enters a fin waste heat recovery device 5 through the gas conveying pipe 10, the rapid cooling granulation device 2 is communicated with a full waste heat recovery water vapor system 3 through a plurality of connecting pipes 11, and the full waste heat recovery water vapor system 3 recovers waste heat in the molten slag.
As shown in fig. 1, the feeding device 1 includes a double-station pouring device 101 and a granulation blowing device 102. The double-station pouring device 101 is arranged at the upper part of the feed chute 7 and used for conveying molten slag into the feed chute 7, and the double-station pouring device 101 is arranged, namely when the molten slag of one station is poured, the molten slag of the other station is simultaneously changed, so that the continuous operation of the granulation treatment and the waste heat recovery of the molten slag is realized, and therefore, on one hand, the continuous output of steam is facilitated, and on the other hand, the thermal shock impact caused by temperature fluctuation is also reduced.
As shown in fig. 1, a granulation blowing device 102 is provided below the feed chute 7, and the granulation blowing device 102 is used to blow compressed nitrogen gas into the storage bin 8.
As shown in fig. 1 and 3, a fluidized cooling bed device 12 and a uniform discharge device 13 are arranged in the storage bin 8, the fluidized cooling bed device 12 is positioned below the feed chute 7 in the storage bin 8, and the fluidized cooling bed device 12 comprises an air distribution assembly 14, a high-pressure air blower 15 communicated with the air distribution assembly 14 and a high-pressure evaporator 16 arranged below the air distribution assembly 14. The uniform discharging device 13 is arranged at the bottom of the storage bin 8, a discharging hopper 17 and a vibrating screen 18 are arranged below the uniform discharging device 13, and the vibrating screen 18 is arranged below the discharging hopper 17.
As shown in figure 1, the molten slag is discharged into a vibrating screen 18 through a discharge hopper 17, the vibrating screen 18 screens the molten slag into coarse slag and fine slag, the coarse slag enters a coarse material hopper 19, and the fine slag is conveyed to a corresponding position through a fine material pneumatic conveying and sending device 20.
As shown in fig. 1 and 4, to achieve uniform gas injection of the slag by the gas distribution assembly 14, the efficiency of the fluidization cooling is increased. The gas distribution assembly 14 comprises a total gas inlet pipe 1401, a distribution gas pipe 1402, a branch gas pipe 1403 and gas nozzles 1404, wherein the total gas inlet pipe 1401 is communicated with the outlet of the high-pressure blower 15, the distribution gas pipe 1402 is communicated with the total gas inlet pipe 1401, the branch gas pipe 1403 is provided with a plurality of gas pipes, one end of the branch gas pipe 1403 is communicated with the distribution gas pipe 1402, the branch gas pipes 1403 are arranged in parallel, and the branch gas pipe 1403 is provided with a plurality of gas nozzles 1404. The high-pressure blower 15 blows air, which is ejected along the air nozzle 1404 through the main air intake pipe 1401, the distribution air pipe 1402, and the branch air pipe 1403.
As shown in fig. 1 and 3, since steam escapes during the discharging process, the temperature in the storage bin 8 is maintained in a stable state in order to achieve uniform discharging. The uniform discharging device 13 comprises bin bottom plates 1301, chute sections 1302 and bottom supporting plates 1303, wherein the bin bottom plates 1301 are arranged in a clearance mode, the bottom supporting plates 1303 are connected to the lower portions of the clearances of the two bin bottom plates 1301, the chute sections 1302 are connected between the bin bottom plates 1301 and the bottom supporting plates 1303, and the chute sections 1302 on the two sides of the clearances form a channel. The bottom supporting plate 1303 is provided with a boosting nozzle 21 in a penetrating manner, the lower end of the boosting nozzle 21 is connected with a boosting air pipe 22, and the boosting air pipe 22 is communicated with an external air supply system. The boosting nozzle 21 blows the gas source vertically upwards, and the molten slag is discharged from the storage bin 8 layer by layer stably and uniformly under the boosting action of the gas source.
As shown in fig. 1, the constant temperature flue gas filtering device 4 includes a casing 401, a phase change heat storage rod 402 disposed in the middle of the casing 401, and an ash bucket 403 disposed in the lower portion of the casing 401, wherein the casing 401 has an air inlet 23 and an air outlet 24, the air inlet 23 is disposed on the casing 401, the air outlet 24 is disposed on the upper portion of the casing 401, the filtered flue gas is discharged along the air outlet 24 and then enters the fin waste heat recovery device 5, and the outlet end of the fin waste heat recovery device 5 is connected with a heat exchanger, an exhaust fan and an exhaust chimney.
As shown in fig. 1, in order to prevent the dust carried away by the rising of the flue gas from accumulating in the phase change heat storage rods 402, an ash removal pipe 25 is arranged in the casing 401, the ash removal pipe 25 is positioned above the phase change heat storage rods 402, one end of the ash removal pipe 25 is communicated with an external air supply system, a plurality of ash removal nozzles 26 are communicated with the ash removal pipe 25, and the ash removal nozzles 26 blow air between the phase change heat storage rods 402 to blow out the dust between the phase change heat storage rods 402.
As shown in fig. 1 and 5, the full waste heat recovery water vapor system 3 is connected with a high-pressure steam drum 301, a heat accumulator 302, a low-pressure steam drum 303, a water diversion header tank 304, a pressure pump 305, a deaerator 306 and a soft water tank 307 through pipelines, the high-pressure steam drum 301 is simultaneously communicated with the vaporization cooling flue 9, the storage bin 8 and the high-pressure evaporator 16, so that a gas mixture enters the high-pressure steam drum 301, and steam enters the heat accumulator 302 after the steam-water separation of the high-pressure steam drum 301.
The specific implementation process comprises the following steps: when the system starts to work, firstly, the double-station pouring device 101 pours the molten slag into the feeding chute 7, the molten slag enters the storage bin 8 along the feeding chute 7, the flue gas in the storage bin 8 enters the constant-temperature flue gas filtering device 4 through the vaporization cooling flue 9, the molten slag in the storage bin 8 is granulated and cooled through the rapid cooling granulation device 2, and then the molten slag is discharged through the uniform discharging device 13 and respectively enters the coarse material hopper 19 and the fine material pneumatic conveying and sending device 20. Hot flue gas generated in the vaporization cooling flue 9, the storage bin 8 and the high-pressure evaporator 16 simultaneously enters the high-pressure steam drum 301, waste heat recovery is carried out through the heat accumulator 302 and the like, and meanwhile, the filtered flue gas enters the fin waste heat recovery device 5 through the gas conveying pipe 10, so that waste heat in the slag is further recovered.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A high-temperature liquid dilute slag air quenching granulation and waste heat recovery system is characterized by comprising a feeding device (1), an emergency cooling granulation device (2), a full waste heat recovery water vapor system (3), a constant-temperature flue gas filtering device (4) and a fin waste heat recovery device (5); the feeding device (1) comprises a feeding groove (7), the quenching and granulating device (2) comprises a storage bin (8), the feeding groove (7) is arranged on the side wall of the storage bin (8), and molten slag enters the storage bin (8) through the feeding groove (7); the upper part of the storage bin (8) is communicated with a vaporization cooling flue (9), and flue gas in the slag enters the constant-temperature flue gas filtering device (4) through the vaporization cooling flue (9); the upper part of the constant-temperature flue gas filtering device (4) is connected with a gas conveying pipe (10), and the filtered flue gas enters the fin waste heat recovery device (5) through the gas conveying pipe (10); the quenching and granulating device (2) is communicated with the full waste heat recovery water vapor system (3) through a plurality of connecting pipes (11), and the full waste heat recovery water vapor system (3) recovers waste heat in the molten slag.
2. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 1, wherein: the feeding device (1) comprises a double-station pouring device (101) and a granulation blowing device (102); the double-station pouring device (101) is arranged at the upper part of the feed chute (7) and is used for conveying molten slag into the feed chute (7); the granulation blowing device (102) is arranged below the feed chute (7), and the granulation blowing device (102) is used for blowing compressed nitrogen or compressed air into the storage bin (8).
3. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 1, wherein: the storage bin (8) comprises a fluidized cooling bed device (12) and a uniform discharging device (13), the fluidized cooling bed device (12) is positioned below a feeding groove (7) in the storage bin (8), and the fluidized cooling bed device (12) comprises an air distribution assembly (14), a high-pressure air blower (15) communicated with the air distribution assembly (14) and a high-pressure evaporator (16) arranged below the air distribution assembly (14); even discharge apparatus (13) set up in the bottom of storing storehouse (8), even discharge apparatus (13) below is provided with discharge hopper (17), vibratory screen (18) set up in discharge hopper (17) below.
4. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 3, wherein: the gas distribution assembly (14) comprises a total gas inlet pipe (1401), a distribution gas pipe (1402), branch gas pipes (1403) and gas nozzles (1404), the total gas inlet pipe (1401) is communicated with an outlet of a high-pressure blower (15), the distribution gas pipe (1402) is communicated with the total gas inlet pipe (1401), the branch gas pipes (1403) are provided with a plurality of gas nozzles, one end of each branch gas pipe (1403) is communicated with the distribution gas pipe (1402), the branch gas pipes (1403) are arranged in parallel, and the branch gas pipes (1403) are provided with the gas nozzles (1404).
5. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 3, wherein: even discharge apparatus (13) are including storehouse bottom plate (1301), elephant trunk section (1302) and bottom plate (1303), storehouse bottom plate (1301) clearance is arranged, bottom plate (1303) are connected in two storehouse bottom plate (1301) clearance lower parts, be connected with swift current pipeline section (1302) between storehouse bottom plate (1301) and bottom plate (1303), wear to be equipped with boosting nozzle (21) on bottom plate (1303), the lower extreme of boosting nozzle (21) is connected with boosting trachea (22), boosting trachea (22) and outside air supply system intercommunication.
6. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 3, wherein: and a coarse material hopper (19) and a fine material pneumatic conveying and sending device (20) are respectively arranged below the vibrating screen (18).
7. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 1, wherein: constant temperature flue gas filter equipment (4) include casing (401), set up phase change heat storage stick (402) at casing (401) middle part, set up ash bucket (403) in casing (401) lower part, air inlet (23), gas outlet (24) have been seted up on casing (401), air inlet (23) are seted up on casing (401), gas outlet (24) set up on casing (401) upper portion, and the flue gas is discharged along gas outlet (24) after filtering, then gets into fin waste heat recovery device (5).
8. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 7, wherein: be provided with deashing pipe (25) in casing (401), deashing pipe (25) are located phase change heat accumulation stick (402) top, the one end and the outside air supply system intercommunication of deashing pipe (25), the intercommunication has a plurality of deashing shower nozzles (26) on deashing pipe (25).
9. The high-temperature liquid dilute molten slag air quenching granulation and waste heat recovery system as claimed in claim 1, wherein: the full waste heat recovery water vapor system (3) is connected with a high-pressure steam drum (301), a heat accumulator (302), a low-pressure steam drum (303), a water diversion header tank (304), a pressure pump (305), a deaerator (306) and a soft water tank (307) through pipelines, a gas mixture enters the high-pressure steam drum (301), and steam enters the heat accumulator (302) after the steam-water separation of the high-pressure steam drum (301).
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| CN202110180717.9A CN112725554A (en) | 2021-02-09 | 2021-02-09 | High-temperature liquid dilute slag air quenching granulation and waste heat recovery system |
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| CN202110180717.9A CN112725554A (en) | 2021-02-09 | 2021-02-09 | High-temperature liquid dilute slag air quenching granulation and waste heat recovery system |
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| CN (1) | CN112725554A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725553A (en) * | 2021-02-09 | 2021-04-30 | 无锡红旗除尘设备有限公司 | High-temperature liquid dilute slag quenching dry type granulation and waste heat recovery system |
| CN115094168A (en) * | 2022-06-02 | 2022-09-23 | 中节能工业节能有限公司 | Slag recovery system |
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2021
- 2021-02-09 CN CN202110180717.9A patent/CN112725554A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725553A (en) * | 2021-02-09 | 2021-04-30 | 无锡红旗除尘设备有限公司 | High-temperature liquid dilute slag quenching dry type granulation and waste heat recovery system |
| CN115094168A (en) * | 2022-06-02 | 2022-09-23 | 中节能工业节能有限公司 | Slag recovery system |
| CN115094168B (en) * | 2022-06-02 | 2024-02-20 | 中节能工业节能有限公司 | Slag recovery system |
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