CN104388608A - Dry granulation waste heat recovering and grinding treatment system - Google Patents

Dry granulation waste heat recovering and grinding treatment system Download PDF

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Publication number
CN104388608A
CN104388608A CN201410655012.8A CN201410655012A CN104388608A CN 104388608 A CN104388608 A CN 104388608A CN 201410655012 A CN201410655012 A CN 201410655012A CN 104388608 A CN104388608 A CN 104388608A
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China
Prior art keywords
granulation
outlet
air
rotating shaft
waste heat
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CN201410655012.8A
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Chinese (zh)
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CN104388608B (en
Inventor
朱恂
谭煜
王宏
吴君军
廖强
丁玉栋
李俊
叶丁丁
黄云
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Chongqing University
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Chongqing University
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B3/00General features in the manufacture of pig-iron
    • C21B3/04Recovery of by-products, e.g. slag
    • C21B3/06Treatment of liquid slag
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies

Abstract

The invention discloses a dry granulation waste heat recovering and grinding treatment system. The system comprises a slag storage bin, a granulation cavity, a granulator, a fluidized bed and a ball mill. The system is characterized in that a first air outlet is formed in the top of the granulation cavity, and is connected with a high-temperature booster fan by virtue of a pipeline; the granulator is arranged in the granulation cavity, and is positioned under a feeding pipe; an air flue is formed in the side wall of the granulation cavity along the circumference, and a plurality of air openings formed in the air flue are communicated with the granulation cavity; the fluidized bed is arranged at the lower part of the granulation cavity, and a slag outlet pipe is arranged at the bottom of the fluidized bed; the slag outlet pipe is communicated with the ball mill; and the outlet of the ball mill is connected with a tailing classifier. According to the system, a granulation device, a heat recovery device and a ball mill device are combined to realize a dry granulation function and effective waste heat recovery, and the produced granules can be directly used as raw materials of cement and the like without treatment and can be widely applied to steel, metallurgy and other fields.

Description

Dry granulation waste heat recovery with grind treatment system
Technical field
The present invention relates to waste heat recovery and grind process, be specifically related to dry granulation waste heat recovery and grind treatment system.
Background technology
Blast furnace slag is in blast furnace ironmaking process, and the by product formed by the non-volatilization component in the gangue in ore, the ash content in fuel and flux, blast furnace slag main component is CaO, SiO 2, A1 2o 3, Fe 2o 3, MgO, MnO, TiO 2deng, China's pig iron output about 7.5 hundred million t in 2013, even if produce 0.3 ton of slag calculating by often producing 1 ton of pig iron, blast furnace slag output is about 2.25 hundred million t.The heat contained by about l500 DEG C, the 1t blast furnace slag of tapping temperature of blast furnace slag is equivalent to 64kg standard coal, and the heat in the annual blast furnace slag produced is equivalent to 1.44 × 10 7t standard coal, if the Btu utilization in blast furnace slag can be got up, can produce considerable energy conservation benefit.
Traditional Treating Methods for BF Slag is that the material adopting water quenching technology to realize blast furnace slag utilizes, namely be carry out chilling with a large amount of cold water to high-temperature slag make slag be broken into particle and form the blast furnace slag after shrend, can be used as the Some substitute product of silicate cement, produce ordinary Portland cement.But this method has many shortcomings, not only the sensible heat of blast furnace slag cannot be recycled, and causes a large amount of wastes of water resources, also can produce serious pollution, adverse condition to air, water and soil.In order to overcome the shortcomings of Water Quenching; investigators propose the blast furnace slag treatment process of dry granulation in conjunction with waste heat recovery, can reclaim the heat in blast furnace slag, obtain the slag particle of high vitreum content; and energy-conserving and environment-protective, obtain general concern of Chinese scholars.
Blast furnace slag to be used as the raw material of manufacture of cement, blast furnace slag is needed to wear into micro mist, a large amount of heats will be produced in the process ground, the heat of this part is difficult to be utilized, if process will be ground reasonably to be joined inside residual neat recovering system, the heat grinding generation can be reclaimed while recovery waste heat, considerable economic benefit will be produced, and the raw material that can be directly used in manufacture of cement can be obtained.
Summary of the invention
Technical problem to be solved by this invention is provide dry granulation waste heat recovery and grind treatment system.
According to technical scheme of the present invention, dry granulation waste heat recovery with grind treatment system, comprise sludge-store cabin, granulation chamber, pelletizer, fluidized-bed, ball mill; Described sludge-store cabin is connected with granulation chamber by filling tube; It is characterized in that: the top of described granulation chamber is provided with the first air outlet, this first air outlet connects high temperature pressurised blower fan by pipeline; Arrange pelletizer in described granulation chamber, this pelletizer is positioned at the below of filling tube; The sidewall of described granulation chamber is circumferentially provided with air channel, this air channel is provided with multiple air port and is connected with granulation chamber; The bottom of described granulation chamber arranges described fluidized-bed, and the bottom of described fluidized-bed is provided with residue outlet, and this residue outlet is connected with described ball mill; Described ball mill outlet is connected with mill separator; The bottom meal outlet of described mill separator is connected with residue outlet by feed back pipe, and fine powder outlet in top is connected with primary cyclone; Described primary cyclone outlet at bottom connects slag ladle, top exit by high-temperature blower be arranged on the air channel being granulated chamber sidewall and be connected;
Described pelletizer comprises revolving cup and rotating-disk, and described revolving cup is solidly set in interior rotating shaft, and this interior rotating shaft is located in hollow rotating shaft; Described rotating-disk is arranged on the below of described revolving cup, and is solidly set on described hollow rotating shaft; Described hollow rotating shaft is supported mutually by bearing and described interior rotating shaft; Described interior rotating shaft is driven by motor one, and described hollow rotating shaft is driven by motor two, and described revolving cup is contrary with rotating-disk sense of rotation; Described rotating-disk is circumferentially provided with cutting tip, and described cutting tip is positioned at the outside of described revolving cup.
Wherein, the effect of pelletizer makes molten blast furnace slag form tiny melt granules, achieves dry granulation function, protection of the environment, saving water resource; Revolving cup can realize the movement velocity even variation of liquid film; to ensure that liquid film has longer run duration in revolving cup; liquid film is impelled to obtain larger speed; thus reduction thickness of liquid film; formed at revolving cup edge and be once granulated; granulated product continues motion, secondary granulation occurs after striking the broken blade of rotation, thus makes the granulated particles size of formation less.When slag flow sharply increases, cause being full of slag in revolving cup, slag will overflow revolving cup, flow to rotating-disk, and it can ensure that the slag overflowed completes centrifugal granulation process; Rotating-disk can hinder the freezing air and brin or liquid film generation heat exchange that pass into bottom warehouse effectively, can ensure that brin or liquid film complete centrifugal granulation process in molten state, simultaneously, for " cotton slag " or block that part slag is formed because of heat exchange after coagulation, also can be cut blade cut and become small-particle, thus ensure in granulated product without " cotton slag " or block; The effect of fluidized-bed is by the intense mixing between high-temperature particle and Cryogenic air, completes the removal process of heat; The effect of ball mill is by further for slag granules refinement, and the particle after refinement does not need to carry out process and just directly as the raw material of cement etc., and can realize particle heat and grind the removal process producing heat.
Granulating device combines with steel mill apparatus by the present invention; molten blast furnace slag and air are being granulated in chamber, fluidized-bed and ball mill respectively through repeatedly heat exchange; heat recuperation rate is high; the quality of warm air is high; achieve efficient waste heat to reclaim; and high-quality warm air is entered in hotblast stove as high temperature combustion air after the compression of high temperature pressurised blower fan; the heat of recovery is reasonably used; and the powder of output does not need to carry out process just can directly as the raw material of cement etc.; production efficiency is high, and cost is low.
According to dry granulation waste heat recovery of the present invention and the preferred version grinding treatment system, the entrance of described residue outlet is provided with mechanical slag off apparatus, and residue outlet tube wall is provided with high-pressure air Apparatus for spraying and jetting particulate materials.Wherein, the effect of mechanical slag off apparatus forces particle to enter in residue outlet, and one-level waste heat recovery unit and secondary waste heat recovery unit can be separated; The effect of high-pressure air Apparatus for spraying and jetting particulate materials is cleaned residue outlet with the high-pressure air of pulsation, prevents residue outlet from blocking.
According to dry granulation waste heat recovery of the present invention and the preferred version grinding treatment system, described in cut oblique blade and circumferentially arrange by different radii layering on described rotating-disk.For ensureing that macrobead is cut, obtain the little slag particle of high vitreous state content; Broken blade installation site on a rotary disc can be set according to brin or liquid film length, to cut brin head particle, thus the effective macrobead reduced in granulated product, make granulated particles more even.
According to dry granulation waste heat recovery of the present invention and the preferred version grinding treatment system, fluidized-bed is wind-cowl air distribution plate fluidized-bed.
According to dry granulation waste heat recovery of the present invention and the preferred version grinding treatment system, be connected with two pole cyclonic separators between described primary cyclone and high-temperature blower, described granulation chamber air outlet is outside equipped with three-stage cyclone separator.
Dry granulation waste heat recovery of the present invention with the beneficial effect grinding treatment system is: the present invention is by granulating device, heat reclaim unit combines with ball mill device, both dry granulation function had been achieved, protection of the environment, saving water resource, molten blast furnace slag and air is made again to be granulated chamber respectively, through repeatedly heat exchange in fluidized-bed and ball mill, heat recuperation rate is high, the quality of warm air is high, achieve efficient waste heat to reclaim, and high-quality warm air is entered in hotblast stove as high temperature combustion air after the compression of high temperature pressurised blower fan, the heat of recovery is reasonably used, and the particle of output does not need to carry out process just can directly as the raw material of cement etc., there is efficiency high, cost is low, structure is simple, energy-conserving and environment-protective, heat recuperation rate is high, the feature of stable and reliable operation, native system can be widely used in the fields such as iron and steel, metallurgy, electric power.
Accompanying drawing explanation
Fig. 1 is dry granulation waste heat recovery of the present invention and the structural representation grinding treatment system.
Fig. 2 is the scheme of installation of revolving cup 31 and rotating-disk 32
Fig. 3 is rotating-disk schematic diagram in specific embodiment.
Fig. 4 is the structural representation of broken blade in specific embodiment.
Embodiment
See Fig. 1 to Fig. 4, dry granulation waste heat recovery with grind treatment system, comprise sludge-store cabin 1, granulation chamber 2, pelletizer 3, fluidized-bed 4, ball mill 5; Described sludge-store cabin 1 is connected with granulation chamber 2 by filling tube 10; It is characterized in that: the top of described granulation chamber 2 is provided with the first air outlet, this first air outlet connects high temperature pressurised blower fan 14 by pipeline; Arrange pelletizer 3 in described granulation chamber 2, this pelletizer 3 is positioned at the below of filling tube 10; The sidewall of described granulation chamber 2 is circumferentially provided with air channel, this air channel is provided with multiple air port 12 and is connected with granulation chamber 2; The bottom of described granulation chamber 2 arranges described fluidized-bed 4, and fluidized-bed 4 blasts air by blower fan 11, and the bottom of described fluidized-bed 4 is provided with residue outlet 7, and this residue outlet 7 is connected with described ball mill 5; Described ball mill 5 exports and is connected with mill separator 17, and ball mill 5 blasts air by blower fan 13; The bottom meal outlet of described mill separator 17 is connected with residue outlet 7 by feed back pipe 15, and fine powder outlet in top is connected with primary cyclone 18; Described primary cyclone 18 outlet at bottom connects slag ladle 6, top exit by high-temperature blower 19 be arranged on the air channel being granulated chamber 2 sidewall and be connected;
Described pelletizer 3 comprises revolving cup 31 and rotating-disk 32, and described revolving cup 31 is solidly set in interior rotating shaft 34, and this interior rotating shaft 34 is located in hollow rotating shaft 35; Described rotating-disk 32 is arranged on the below of described revolving cup 31, and is solidly set on described hollow rotating shaft 35; Described hollow rotating shaft 35 is supported with described interior rotating shaft 34 phase by bearing 38; The lower end of described interior rotating shaft 34 and hollow rotating shaft 35 is all stretched out bottom fluidized-bed 4, and described interior rotating shaft 34 is driven by motor 1, and described hollow rotating shaft 35 is driven by motor 2 37, and described revolving cup 31 is contrary with rotating-disk 32 sense of rotation; Described rotating-disk 32 is circumferentially provided with cutting tip 33, and described cutting tip 33 is positioned at the outside of described revolving cup 31, and described revolving cup 31 inside is hemispherical cavity, and the top of described cutting tip 33 is triangular prism-shaped.Cutting tip 33 circumferentially can be pressed different radii layering and arrange on described rotating-disk 32, makes granulated product produce secondary, even repeatedly be granulated for three times, can obtain the granulated particles that size is less.
The entrance of described residue outlet 7 is provided with mechanical slag off apparatus 8, and residue outlet 7 tube wall is provided with high-pressure air Apparatus for spraying and jetting particulate materials 9; Fluidized-bed 4 is wind-cowl air distribution plate fluidized-bed, is operated in bubbling fluidized bed state; Be connected with two pole cyclonic separators 21 between described primary cyclone 18 and high-temperature blower 19, the first air outlet of described granulation chamber 2 is outside equipped with three-stage cyclone separator 20.
Working process of the present invention is: the molten blast furnace slag be stored in sludge-store cabin 1 enters granulation chamber 2; tiny melt granules is formed under the effect of pelletizer 3; and heat exchange is carried out in granulating Yu from the air of primary cyclone 18 and the high-temperature gas of fluidized-bed 4, complete cooled and solidified process.Particle temperature after cooled and solidified is still very high, particle drops in the fluidized-bed 4 of bottom, heat exchange is carried out with from the air in gas blower 11, the temperature of particle reduces further, and residue outlet 7 is entered under the effect of mechanical slag off apparatus 8, the high-pressure air of the high-pressure air Apparatus for spraying and jetting particulate materials 9 meeting pulsation that residue outlet 7 tube wall is arranged cleans residue outlet 7, prevents residue outlet 7 from blocking.Particle is discharged from residue outlet 7 and is entered ball mill 5, ball mill 5 pairs of particles carry out grinding, and in ball mill 5, carry out heat exchange with the high velocity air of gas blower 13, simultaneously under the winding-up effect of blower fan 13 high velocity air, powder is carried to mill separator 17, meal returns in ball mill 5, and the fine powder after heat exchange enters in slag ladle 6 through primary cyclone 18.
The flowing-path of air is: air is sent in fluidized-bed 4 by gas blower 11, high-temperature gas is obtained after carrying out heat exchange with particle, this high-temperature gas carries out heat exchange with the melt granules in granulating again in granulation chamber 2, and discharges from first air outlet at granulation chamber 2 top; Air is sent in ball mill 5 by gas blower 13, high-temperature gas is obtained after carrying out heat exchange with particle, this high-temperature gas is through mill separator 17 and primary cyclone 18, and enter in granulation chamber 2 under the effect of high-temperature blower 19, carry out heat exchange with the melt granules in granulating again at granulation chamber 2, and discharge from first air outlet at granulation chamber 2 top; The air of the high-temperature that the first air outlet is discharged through three-stage cyclone separator 20 dedusting, then enters in hotblast stove as high temperature combustion air after high temperature pressurised blower fan 14 pressurizes.

Claims (4)

1. dry granulation waste heat recovery with grind treatment system, comprise sludge-store cabin (1), granulation chamber (2), pelletizer (3), fluidized-bed (4), ball mill (5); Described sludge-store cabin (1) is connected with granulation chamber (2) by filling tube (10); It is characterized in that: the top of described granulation chamber (2) is provided with the first air outlet, this first air outlet connects high temperature pressurised blower fan (14) by pipeline; Arrange pelletizer (3) in described granulation chamber (2), this pelletizer (3) is positioned at the below of filling tube (10); The sidewall of described granulation chamber (2) is circumferentially provided with air channel, this air channel is provided with multiple air port (12) and is connected with granulation chamber (2); The bottom of described granulation chamber (2) arranges described fluidized-bed (4), the bottom of described fluidized-bed (4) is provided with residue outlet (7), and this residue outlet (7) is connected with described ball mill (5); Described ball mill (5) outlet is connected with mill separator (17); The bottom meal outlet of described mill separator (17) is connected with residue outlet (9) by feed back pipe (15), and fine powder outlet in top is connected with primary cyclone (18); Described primary cyclone (18) outlet at bottom connects slag ladle (6), top exit by high-temperature blower (19) be arranged on the air channel being granulated chamber (2) sidewall and be connected;
Described pelletizer (3) comprises revolving cup (31) and rotating-disk (32), described revolving cup (31) is solidly set in interior rotating shaft (34), and this interior rotating shaft (34) is located in hollow rotating shaft (35); Described rotating-disk (32) is arranged on the below of described revolving cup (31), and is solidly set on described hollow rotating shaft (35); Described hollow rotating shaft (35) is supported mutually by bearing (38) and described interior rotating shaft (34); Described interior rotating shaft (34) is driven by motor one (36), and described hollow rotating shaft (35) is driven by motor two (37), and described revolving cup (31) is contrary with rotating-disk (32) sense of rotation; Described rotating-disk (32) is circumferentially provided with cutting tip (33), described cutting tip (33) is positioned at the outside of described revolving cup (31).
2. dry granulation waste heat recovery according to claim 1 with grind treatment system; it is characterized in that: the entrance of described residue outlet (7) is provided with mechanical slag off apparatus (8), and residue outlet (7) tube wall is provided with high-pressure air Apparatus for spraying and jetting particulate materials (9).
3. dry granulation waste heat recovery according to claim 1 and 2 with grind treatment system, it is characterized in that: described in cut oblique blade (33) and circumferentially arrange by different radii layering on described rotating-disk (32).
4. dry granulation waste heat recovery as claimed in claim 3 with grind treatment system; it is characterized in that: be connected with two pole cyclonic separators (21) between described primary cyclone (18) and high-temperature blower (19), described granulation chamber (2) air outlet is outside equipped with three-stage cyclone separator (20).
CN201410655012.8A 2014-11-14 2014-11-14 Dry granulation waste heat recovery with grind processing system Active CN104388608B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105498906A (en) * 2015-12-31 2016-04-20 江苏宁绿节能环保有限公司 Device and method for finely crushing high-temperature dry ash of boiler
CN105755188A (en) * 2016-03-11 2016-07-13 西安交通大学 Moving bed device for granulating high-temperature liquid slag and recovering high-temperature sensible heat
CN107955847A (en) * 2018-01-13 2018-04-24 吕家环 A kind of slag treatment and residual neat recovering system
CN108165686A (en) * 2018-01-13 2018-06-15 秦皇岛点知汇科技有限公司 A kind of drum-type slag granulation and residual neat recovering system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5268896A (en) * 1975-12-06 1977-06-08 Mitsubishi Heavy Ind Ltd Method for treatment of slag
CN201648407U (en) * 2010-03-19 2010-11-24 昆明阳光基业股份有限公司 Liquid blast furnace slag granulating device
CN102912044A (en) * 2012-10-22 2013-02-06 李玉亮 Novel efficient and energy-saving dry type granulating system of slag and method thereof
CN103924012A (en) * 2014-05-05 2014-07-16 重庆大学 Device and method for recovering residual heat by dry-process granulation of metallurgical slag

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5268896A (en) * 1975-12-06 1977-06-08 Mitsubishi Heavy Ind Ltd Method for treatment of slag
CN201648407U (en) * 2010-03-19 2010-11-24 昆明阳光基业股份有限公司 Liquid blast furnace slag granulating device
CN102912044A (en) * 2012-10-22 2013-02-06 李玉亮 Novel efficient and energy-saving dry type granulating system of slag and method thereof
CN103924012A (en) * 2014-05-05 2014-07-16 重庆大学 Device and method for recovering residual heat by dry-process granulation of metallurgical slag

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105498906A (en) * 2015-12-31 2016-04-20 江苏宁绿节能环保有限公司 Device and method for finely crushing high-temperature dry ash of boiler
CN105498906B (en) * 2015-12-31 2018-03-09 江苏宁绿节能环保有限公司 Boiler high temperature dry ash slag device and method in small, broken bits
CN105755188A (en) * 2016-03-11 2016-07-13 西安交通大学 Moving bed device for granulating high-temperature liquid slag and recovering high-temperature sensible heat
CN105755188B (en) * 2016-03-11 2018-03-02 西安交通大学 It is a kind of to be used to be granulated high-temperature liquid state slag and reclaim the mobile bed apparatus of high temperature sensible heat
CN107955847A (en) * 2018-01-13 2018-04-24 吕家环 A kind of slag treatment and residual neat recovering system
CN108165686A (en) * 2018-01-13 2018-06-15 秦皇岛点知汇科技有限公司 A kind of drum-type slag granulation and residual neat recovering system

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