CN108285942B - Granulator with cooling function and driving system thereof - Google Patents
Granulator with cooling function and driving system thereof Download PDFInfo
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- CN108285942B CN108285942B CN201810160126.3A CN201810160126A CN108285942B CN 108285942 B CN108285942 B CN 108285942B CN 201810160126 A CN201810160126 A CN 201810160126A CN 108285942 B CN108285942 B CN 108285942B
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- granulator
- air
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- fixing device
- rotating shaft
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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
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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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- 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 granulator with a cooling function and a driving system thereof, comprising a granulator, a granulator fixing device and a granulator driving device; the granulator is disc-shaped or cup-shaped, the edge inclination angle is 30-60 degrees, the center is provided with a guide cone, and the granulator is fixed on a granulator fixing device; an airflow channel is arranged in the granulator fixing device, and an expanded heating surface is arranged at the bottom of the granulator fixing device, which is in contact with the granulator; the top of the granulator fixing device is provided with a plurality of air ports; the granulator driving device is used for driving the granulator to rotate; the cooling of the rotating shaft adopts air cooling, water cooling or oil cooling. The invention can reduce the working temperature of the motor, the rotating shaft and the granulator fixing device and ensure the long-time normal operation of the granulator, thereby ensuring the safe and stable driving of the granulator, better realizing the granulation effect and improving the granulation efficiency.
Description
Technical Field
The invention relates to the technical field of high-temperature liquid slag waste heat recovery, in particular to a granulator with a cooling function and a driving system thereof.
Technical Field
At present, China is the largest iron and steel producing country in the world, and the iron and steel yield is the first place in the world. The pig iron yield in 2015 in China reaches 6.91 hundred million tons, which accounts for about 60% of the total world production. The pig iron yield in China in 10 months in 2016 is 5.86 hundred million tons, which accounts for about 60% of the total world production. 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 ℃, and each ton of slag contains (1260-1880) × 103The sensible heat of kJ, corresponds to 60kg of standard coal. Under the existing iron-making technology in China, 0.3 ton blast furnace slag is produced as a byproduct for producing 1 ton of pig iron, the blast furnace slag with the sensible heat equivalent to 1050 ten thousand tons of standard coal can be produced by folding and calculating according to 5.86 hundred million tons of pig iron output in China at present.
The dry slag pit cooling method and the water slag flushing method are the current onesThe most common blast furnace slag treatment method in China. 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 slag flushing process is continuously developed, the core of the technology is to perform water spraying and water quenching on high-temperature liquid slag so as to achieve the purposes of cooling and granulating, then perform water slag separation, and recycle the water for flushing slag after precipitation and filtration. Although the vitreous slag produced by the method can be applied to the cement industry for resource utilization, a large amount of water resources are wasted in the treatment process, and SO is produced2And H2S and other harmful gases can not effectively recover high-quality waste heat resources contained in the high-temperature liquid slag. The dry processing technology utilizes the indirect or direct contact of high-temperature blast furnace slag and a heat transfer medium to carry out slag granulation and sensible heat recovery, does not consume precious water resources in the processing process, and hardly releases H2S and SO2And the like. With the full promotion of energy conservation and emission reduction work of the steel industry in China, the high-temperature blast furnace slag dry-method centrifugal granulation technology is highly concerned in the industry.
In the dry centrifugal granulation process, high-temperature and high-viscosity slag is thrown away from the surface interface of a rotating disc by the rotating disc rotating at a high speed to form liquid drops in the air, the tiny liquid drops and a heat transfer medium in the space, generally air, carry out strong direct heat exchange to reduce the temperature of the liquid drops, enable the surface of the liquid drops to generate phase change to form a solidified layer, and the liquid drops are gradually changed into solid small particles along with further reduction of the temperature. However, since the temperature of the liquid blast furnace slag is above 1350 ℃, the heat of the blast furnace slag is transferred from the granulator to the tray and then transferred to the rotating shaft, so that the temperature of the granulator tray and the rotating shaft is too high, the strength is reduced, deformation is generated, the granulation effect of the driven granulator is affected, meanwhile, the continuous operation of the motor also causes the temperature rise, the motor failure is easily caused, the service life is shortened, and in addition, due to structural reasons, the shaft can shake back and forth during rotation, and the granulation effect of the granulator is affected.
Disclosure of Invention
The object of the present invention is to provide a granulator with cooling function and its driving system to solve the above technical problems. The invention can reduce the working temperature of the motor, the granulator fixing device and the rotating shaft, stabilize the rotation of the rotating shaft, ensure the safety and stability of the granulator drive and better realize the granulation effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a granulator with cooling function and a driving system thereof comprise a granulator, a granulator fixing device and a granulator driving device; the granulator is disc-shaped or cup-shaped, the edge inclination angle is 30-60 degrees, the center is provided with a guide cone, and the granulator is fixed on a granulator fixing device; an airflow channel is arranged in the granulator fixing device, and an expanded heating surface is arranged at the bottom of the granulator fixing device, which is in contact with the granulator; the top of the granulator fixing device is provided with a plurality of first air ports, and the air outlet angle of the first air ports at the top is intersected with the edge inclination angle of the granulator and used for carrying out external force crushing on a liquid film or a liquid wire formed in the granulation process; a plurality of second air ports are arranged on the side surface of the granulator fixing device, and the second air ports are parallel to or crossed with the edge of the granulator in an inclined angle and are used for cooling liquid drops formed by liquid filament breakage in the granulation process; the first air port and the second air port are communicated with the air flow channel; the granulator driving device is used for driving the granulator to rotate.
Further, the device also comprises a shaft cooling air duct; the granulator driving device comprises a motor and a rotating shaft; the output shaft of the motor is fixedly connected with the lower end of the rotating shaft; the upper end of the rotating shaft is fixedly connected with the bottom of the granulator fixing device; a plurality of temperature-resistant blades are arranged on the rotating shaft; the shaft cooling air duct comprises a motor sealing cover, an air pipe inner sleeve and a shaft sleeve; the sealing cover surrounds the periphery of the motor, and the air pipe inner sleeve and the shaft sleeve are sleeved on the periphery of the rotating shaft; inner rings of the temperature-resistant thrust bearing and the temperature-resistant positioning bearing are fixed on the rotating shaft, and outer rings of the temperature-resistant thrust bearing and the temperature-resistant positioning bearing are fixed on the inner wall of the air pipe inner sleeve; the shaft sleeve is fixed between the outer ring of the topmost temperature-resistant thrust bearing and the outer ring of the bottommost temperature-resistant positioning bearing, and surrounds the temperature-resistant blades; airflow channels are arranged on the temperature-resistant thrust bearing and the temperature-resistant positioning bearing; the sealing cover is fixedly connected with the air pipe inner sleeve and communicated with the air pipe inner sleeve through a vent; an air pipe outer sleeve is arranged on the periphery of the air pipe inner sleeve, an annular cooling air channel is formed between the air pipe outer sleeves on the periphery of the air pipe inner sleeve, and a plurality of air caps are annularly arranged at the top of the annular cooling air channel; the bottom of the air pipe outer sleeve is provided with an annular cooling air duct air inlet.
Further, shaft cooling air enters from air openings of the sealing cover, most of the shaft cooling air enters into an air flow channel of the granulator fixing device after passing through the shaft sleeve to cool the shaft, a plurality of first air openings and second air openings which are annularly and uniformly distributed on the top and the side wall of the granulator fixing device enter into the granulation bin, and a small part of the shaft cooling air enters into the granulation bin from a narrow gap between the granulator fixing device and the air pipe inner sleeve.
Further, the air outlet of the blast cap is lower than the air outlets of the first air port and the second air port.
Furthermore, the included angle between the first air port and the horizontal plane is 45-90 degrees.
Further, there are three ways of generating shaft cooling air:
the method comprises the following steps that firstly, cooling air is generated by a fan and enters from an air port of a sealing cover, most of the cooling air flows out through an air flow channel of a granulator fixing device, and the small cooling air flows out from a narrow gap between the fixing device and an inner sleeve of an air pipe;
in the second mode, the temperature-resistant blades on the rotating shaft rotate at high speed along with the rotating shaft to generate cooling air, most of the cooling air flows out through the airflow channel of the granulator fixing device, and a small part of the cooling air flows out from a narrow gap between the fixing device and the air pipe inner sleeve;
and in the third mode, the air outlet of the fan is matched with the high-speed rotating air outlet of the temperature-resistant blade to serve as shaft cooling air, and the shaft cooling air duct and the rotating shaft are cooled.
Further, a shaft cooling flow channel can be adopted;
the granulator driving device comprises a motor and a rotating shaft; the output shaft of the motor is fixedly connected with the lower end of the rotating shaft; the upper end of the rotating shaft is fixedly connected with the bottom of the granulator fixing device;
the shaft cooling flow passage comprises a water/oil jacket; the water/oil sleeve is arranged on the periphery of the rotating shaft and is sealed; when water/oil cooling is carried out, water/oil enters the water/oil sleeve from a water/oil inlet at the bottom of the water/oil sleeve, is discharged from a water/oil outlet at the upper part after the rotating shaft is cooled, enters an oil/water cooling and power system for cooling, and participates in circulation again to cool the rotating shaft.
Further, the granulator fixing device consists of a left part and a right part which are fixed through pins and hoops.
Further, fixed brackets are fixed on the periphery of the outer sleeve of the air pipe at intervals; the outer wall of the air pipe outer sleeve is provided with a wedge-shaped fixing block; the lower part of the wedge-shaped fixed block is supported with a sliding block, and the fixed bracket is connected with the sliding block through a bolt; the granulator, the granulator fixing device and the granulator driving device are supported on the sliding block, and the height of the granulator can be adjusted by adjusting the distance between the sliding block and the fixing support through the rotating bolt.
Compared with the prior art, the invention has the following beneficial effects:
1) the rotating shaft can adopt air cooling or water/oil cooling, and when the air cooling is carried out, the rotating shaft is provided with one-stage, two-stage or multi-stage temperature-resistant blades, in the granulating process, the rotating shaft rotates to drive the temperature-resistant blades to rotate to generate flowing power of a shaft cooling air channel, and in the granulating process, shaft cooling air is generated along with the granulating process, so that the requirement on equipment is reduced, the system is simpler and more convenient, and meanwhile, the temperature-resistant blades can also be used as fin structures to strengthen the heat dissipation of the whole rotating shaft; the rotating shaft can also be cooled by oil or water, water/oil enters the water/oil sleeve from the water/oil inlet at the bottom, the water/oil is discharged from the water/oil outlet at the upper part after the rotating shaft is cooled and enters the oil/water cooling and power system for cooling, and the cooled water/oil participates in circulation again to cool the rotating shaft. The cooling of the motor and the rotating shaft is facilitated, the temperature of the rotating shaft can be prevented from being increased due to the fact that heat generated during the operation of the motor is transferred to the rotating shaft, and meanwhile the operation reliability and the service life of the motor and the rotating shaft are improved.
2) In the invention, one or more temperature-resistant positioning bearings are arranged at the part of the rotating shaft close to the granulator fixing device, so that the shaking of the rotating shaft in the granulation process due to the insufficient precision of a mechanical structure can be greatly reduced, the service life of equipment is prolonged, the granulation effect is improved, the particle size distribution of granulated particles is more stable, and the operation of the granulator is more stable.
3) In the invention, the interior of the granulator fixing device is provided with the streamline airflow channel and the annular fin structure is arranged to strengthen heat exchange, so that the granulator fixing device is better cooled; after passing through the air pipe inner sleeve and the shaft sleeve, shaft cooling air enters the flow channel from the lower part of the granulator fixing device and is divided into two air streams, the two air streams respectively enter the granulation bin from the side surface and the top part of the granulator fixing device, the included angle between the air port at the top part and the horizontal direction can be 45-90 degrees, the granulation air stream can perform the wind crushing function on granulated particles in the granulation process, the included angle between the air stream at the side surface and the granulator fixing device can be 30-60 degrees and is parallel to the track of the granulated particles, and the wind quenching function can be performed on the granulated particles in the granulation process. Is beneficial to cooling the granulator fixing device and improves the granulation effect.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of a granulator with cooling function and its driving system according to the present invention;
FIG. 2 is a schematic diagram of a granulator oil/water cooling configuration;
fig. 3 is a schematic view of a granulator and granulator fixture.
209-motor; 210-a sealing cover; 211-a coupling; 212-temperature resistant thrust bearings; 213-wedge-shaped fixed block; 214-a slider; 215-a fixed support; 216-air duct outer sleeve; 217-air duct inner sleeve; 218-a vent; 219-a granulator; 220-blast cap; 221-temperature resistant positioning bearing; 222-a shaft sleeve; 223-a rotating shaft; 224-blades; 225-air inlet; 226-a vent; 227-tuyere; 228-water/oil outlet; 229-water/oil through; 230-water/oil jacket; 231-water inlet/oil outlet; 232-granulator fixing means; 233-a flow channel; 234-extended heated surface; 235-a second tuyere; 236-first tuyere.
Detailed Description
Referring to fig. 1 and 2, a granulator with a cooling function and a driving system thereof according to the present invention includes a granulator 219, a granulator fixing device 232, and a granulator driving device.
The granulator 219 is disc-shaped or cup-shaped, the edge inclination angle is 30-60 degrees, and the center is provided with a guide cone; the granulator 219 is fixed to a granulator fixing device 232; an airflow channel 233 is arranged in the granulator fixing device 232; an extended heated surface 234, such as annular fins, is provided in the bottom of the granulator fixture 232 that contacts the granulator 219 to better cool the granulator fixture; the top of the granulator fixing device 232 is provided with a plurality of air ports 236, the air outlet angle of the air ports at the top is intersected with the edge inclination angle of the granulator, and the liquid film or the liquid filaments formed in the granulation process can be crushed by external force, so that the granulation effect is enhanced; the lateral surface of the granulator fixing device 232 is provided with a plurality of air ports 235, the air ports are parallel to or crossed with the edge inclination angle of the granulator, and can cool liquid drops formed by liquid filament breakage in the granulation process, so that the glass body conversion rate of the liquid drops is improved. The tuyere 236 and the tuyere 235 communicate with the air flow passage 233.
The granulator driving means includes a motor 209, a sealing cap 210, a rotating shaft 223, a shaft sleeve 222, an air duct inner sleeve 217, an air duct outer sleeve 216, a hood 220, and the like. The motor 209 is connected with the rotating shaft 223 through a coupler 211; the rotating shaft is provided with a plurality of temperature-resistant blades 224; the bottom of the rotating shaft 223 is provided with a temperature-resistant thrust bearing 212, the middle part and the upper part of the rotating shaft are provided with one or more temperature-resistant positioning bearings 221, wherein the positioning bearing at the uppermost part should be as close to the bottom of the granulator fixing device 232 as possible, so that the situation that the granulation effect is influenced by the swinging of the rotating shaft rotating at a high speed due to the inaccurate mechanical structure can be improved, and the service life of the equipment can be prolonged.
The shaft cooling air duct includes a motor can 210, an air duct inner sleeve 217, and a shaft sleeve 222. The sealing cover 210 surrounds the periphery of the motor 209, and the air duct inner sleeve 217 and the shaft sleeve 222 are sleeved on the periphery of the rotating shaft 223; inner rings of the temperature-resistant thrust bearing 212 and the temperature-resistant positioning bearing 221 are fixed on the rotating shaft 223, and outer rings of the temperature-resistant thrust bearing and the temperature-resistant positioning bearing are fixed on the inner wall of the air pipe inner sleeve 217; the shaft sleeve 222 is fixed between the outer ring of the topmost temperature-resistant thrust bearing 212 and the outer ring of the bottommost temperature-resistant positioning bearing 221, and encloses most of the temperature-resistant blades 224 therein; the temperature-resistant thrust bearing 212 and the temperature-resistant positioning bearing 221 are respectively provided with an air supply flow channel. The granulator fixing device 232 is fixed to the top of the rotating shaft 223.
The sealing cover 210 is fixedly connected with the air pipe inner sleeve 217 and is communicated with the air vent 226, shaft cooling air enters from an air port 227 of the sealing cover, after cooling the rotating shaft 223 through the inside of the shaft sleeve 222, most of the shaft cooling air enters into an air flow channel 233 of the granulator fixing device 232, a plurality of air ports 236 and air ports 235 which are annularly and uniformly distributed on the top and the side wall of the granulator fixing device 232 enter into a granulation bin, and a small part of the shaft cooling air enters into the granulation bin from a narrow gap between the granulator fixing device 232 and the air pipe inner sleeve 217. An air pipe outer sleeve 216 is arranged on the periphery of the air pipe inner sleeve 217, an annular cooling air duct is formed between the air pipe outer sleeves 216 and arranged on the periphery of the air pipe inner sleeve 217, a plurality of air caps 220 are annularly arranged on the top of the annular cooling air duct, and air outlets of the air caps 220 are lower than air outlets 236 and 235. An annular cooling air duct air inlet 225 is formed at the bottom of the air duct outer sleeve 216.
The fixed brackets 215 are fixed on the periphery of the air duct outer sleeve 216 at intervals; the outer wall of the air pipe outer sleeve 216 is provided with a wedge-shaped fixing block 213; the lower part of the wedge-shaped fixed block 213 is supported with a sliding block 214, and the fixed bracket 215 is connected with the sliding block 214 through a bolt; the granulator 219, the granulator fixing device 232 and the granulator driving device are supported on the sliding block 214, and the distance between the sliding block 214 and the fixing support 215 is adjusted by rotating the bolts, so that the distance between the granulator 219 and the upper slag falling pipe can be adjusted, and the slag granulation condition can be adjusted.
There are three ways of generating shaft cooling air: in the first mode, cooling air is generated by a fan and enters from an air opening 227 of a sealing cover, most of the cooling air enters a granulating bin through an annular air duct of a fixing device of the granulator, and the small cooling air enters the granulating bin from a narrow gap between the fixing device and an inner sleeve 217 of an air pipe; in the second mode, the one-stage, two-stage or multi-stage small temperature-resistant blades 224 are arranged on the rotating shaft 223, cooling air is generated by high-speed rotation of the rotating shaft, most of the cooling air enters the granulating bin through the annular air duct of the granulator fixing device 232, and the small cooling air enters the granulating bin from a narrow gap between the fixing device and the air pipe inner sleeve 217. The rotating shaft 223 is provided with one-stage, two-stage or multi-stage small temperature-resistant blades 224 which rotate at high speed along with the rotating shaft 223, on one hand, the flowing power of a shaft cooling air channel can be generated, the cooling of shaft cooling air to the shaft and the granulator fixing device is accelerated, and on the other hand, the temperature-resistant blades 224 can also be used as a fin structure, so that the integral heat dissipation of the rotating shaft 223 is enhanced; and in the third mode, the air outlet of the fan is matched with the high-speed rotating air outlet of the small temperature-resistant blade to serve as shaft cooling air, and parts such as a shaft cooling air channel, a rotating shaft and the like are cooled.
The rotary shaft 223 may be cooled by water or oil, in addition to air. Relative to the air cooling structure, the shaft sleeve 222 is replaced by a water/oil sleeve 230, and is arranged on the periphery of the rotating shaft 223 and sealed; when water/oil cooling is performed, water/oil enters the water/oil sleeve 230 from the water/oil inlet 231 at the bottom of the water/oil sleeve 230, is discharged from the upper water/oil outlet 228 after cooling the rotating shaft 223, enters the oil/water cooling and power system for cooling, and participates in circulation again to cool the rotating shaft 223.
In the present invention, the granulator securing device 232 is composed of a left and a right part, and is secured by pins and hoops. When the granulator 219 is damaged, the pins are removed, the granulator 219 and the granulator fixing device 232 can be removed, the pins and the anchor ear are removed, the left and right parts of the granulator fixing device 232 can be detached, and the granulator 219 can be removed after the annular hoop is removed. When the granulator 219 cracks, the cracked granulator 219 cannot be thrown away due to the existence of the granulator base and the fixing device, and meanwhile, liquid slag cannot directly drip on the transmission device and the motor 209, so that the system safety is ensured before shutdown and overhaul. Meanwhile, only the granulator 219 needs to be replaced, thereby reducing the cost of replacing the whole granulation device due to damage of the conventional granulator 219. A streamline flow channel 233 is arranged in the granulator fixing device 232; meanwhile, the gap between the side surface of the bottom of the granulator base and the air duct inner sleeve 217 is small, so that most of the air sent from the lower part of the granulator base can enter the streamline flow channel 233 to cool the granulator fixing device 232, and the air sent from the granulator base can blow to the edge of the granulator 219 to strengthen granulation.
In the invention, the hollow flange is adopted to connect the rotating shaft 223 and the granulator fixing device 232, and the hollow flange ensures that an air heat insulation layer is arranged between the granulator base and the rotating shaft 223 to block heat transfer between the granulator 219 and the rotating shaft 223, so that the heat of the granulator base is not transferred to the rotating shaft 223, the granulator 219 is ensured to run safely and stably, and the granulation effect is better realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention; thus, while the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.
Claims (5)
1. A granulator with cooling function and a driving system thereof are characterized by comprising a granulator (219), a granulator fixing device (232) and a granulator driving device;
the granulator (219) is disc-shaped or cup-shaped, the edge inclination angle is 30-60 degrees, the center is provided with a guide cone, and the granulator (219) is fixed on a granulator fixing device (232);
an air flow channel (233) is arranged in the granulator fixing device (232), and an expanded heating surface (234) is arranged at the bottom of the granulator fixing device (232) contacting with the granulator (219); the top of the granulator fixing device (232) is provided with a plurality of first air ports (236), and the air outlet angle of the first air ports (236) at the top is intersected with the edge inclination angle of the granulator and is used for carrying out external force crushing on a liquid film or a liquid wire formed in the granulation process; a plurality of second air ports (235) are arranged on the side surface of the granulator fixing device (232), and the second air ports (235) are parallel to or crossed with the edge of the granulator in an inclined angle and are used for cooling liquid drops formed by liquid filament breakage in the granulation process; the first tuyere (236) and the second tuyere (235) are communicated with the air flow channel (233);
the granulator driving device (232) is used for driving the granulator (219) to rotate;
the shaft cooling air duct is also included;
the granulator driving device comprises a motor (209) and a rotating shaft (223); the output shaft of the motor (209) is fixedly connected with the lower end of the rotating shaft (223); the upper end of the rotating shaft (223) is fixedly connected with the bottom of the granulator fixing device (232); a plurality of temperature-resistant blades (224) are arranged on the rotating shaft (223);
the shaft cooling air duct comprises a motor sealing cover (210), an air duct inner sleeve (217), a shaft sleeve (222) and a rotating shaft (223); the sealing cover (210) surrounds the periphery of the motor (209), and the air pipe inner sleeve (217) and the shaft sleeve (222) are sleeved on the periphery of the rotating shaft (223); inner rings of the temperature-resistant thrust bearing (212) and the temperature-resistant positioning bearing (221) are fixed on the rotating shaft (223), and outer rings of the temperature-resistant thrust bearing and the temperature-resistant positioning bearing are fixed on the inner wall of the air pipe inner sleeve (217); the shaft sleeve (222) is fixed between the outer ring of the top temperature-resistant thrust bearing (212) and the outer ring of the lowest temperature-resistant positioning bearing (221), and surrounds the temperature-resistant blades (224); airflow channels are arranged on the temperature-resistant thrust bearing (212) and the temperature-resistant positioning bearing (221);
the sealing cover (210) is fixedly connected with the air pipe inner sleeve (217) and is communicated with the air pipe inner sleeve through a vent (226);
an air pipe outer sleeve (216) is arranged on the periphery of the air pipe inner sleeve (217), an annular cooling air channel is formed between the air pipe inner sleeve (217) and the air pipe outer sleeve (216), and a plurality of air caps (220) are annularly arranged at the top of the annular cooling air channel; the bottom of the air pipe outer sleeve is provided with an annular cooling air duct air inlet (225);
shaft cooling air enters from an air port (227) of a sealing cover, most of the shaft cooling air enters an air flow channel of a granulator fixing device (232) after cooling a rotating shaft (223) through the inside of a shaft sleeve, a plurality of first air ports (236) and second air ports (235) which are annularly and uniformly distributed from the top and the side wall of the granulator fixing device enter a granulation bin, and the small part of the shaft cooling air enters the granulation bin from a narrow gap between the granulator fixing device (232) and an air pipe inner sleeve (217);
the air outlet of the blast cap (220) is lower than the air outlets of the first air port (236) and the second air port (235);
the included angle between the first air port (236) and the horizontal plane is 45-90 degrees.
2. The granulator and its driving system with cooling function as claimed in claim 1, wherein: there are three ways of generating shaft cooling air:
in the first mode, cooling air is generated by a fan and enters from an air port (227) of a sealing cover, most of the cooling air flows out through an air flow channel (233) of a granulator fixing device, and the small cooling air flows out from a narrow gap between the fixing device and an inner sleeve (217) of an air pipe;
in the second mode, the temperature-resistant blades (224) on the rotating shaft (223) rotate at high speed along with the rotating shaft to generate cooling air, most of the cooling air flows out through the air flow channel (233) of the granulator fixing device (232), and the small part of the cooling air flows out from a narrow gap between the fixing device and the air pipe inner sleeve (217);
and in the third mode, the air outlet of the fan is matched with the high-speed rotating air outlet of the temperature-resistant blade (224) to serve as shaft cooling air, and the shaft cooling air duct and the rotating shaft (223) are cooled.
3. The granulator and its driving system with cooling function as claimed in claim 1, wherein: a shaft cooling flow channel is adopted;
the granulator driving device comprises a motor (209) and a rotating shaft (223); the output shaft of the motor (209) is fixedly connected with the lower end of the rotating shaft (223); the upper end of the rotating shaft (223) is fixedly connected with the bottom of the granulator fixing device (232);
the shaft cooling flow passage includes a water/oil jacket (230); the water/oil sleeve (230) is arranged on the periphery of the rotating shaft and sealed; when water/oil cooling is carried out, water/oil enters the water/oil sleeve (230) from a water/oil inlet (229) at the bottom of the water/oil sleeve (230), is discharged from an upper water/oil outlet (228) after the rotating shaft (223) is cooled, enters an oil/water cooling and power system for cooling, and participates in circulation again to cool the rotating shaft (223).
4. The granulator and its driving system with cooling function as claimed in claim 1, wherein: the granulator fixing device (232) consists of a left part and a right part and is fixed by pins and hoops.
5. The granulator and its driving system with cooling function as claimed in claim 1, wherein: the periphery of the air duct outer sleeve (216) is fixed with fixed brackets (215) at intervals; the outer wall of the air pipe outer sleeve (216) is provided with a wedge-shaped fixing block (213); the lower part of the wedge-shaped fixed block (213) is supported with a sliding block (214), and the fixed bracket (215) is connected with the sliding block (214) through a bolt; the granulator (219), the granulator fixing device (232) and the granulator driving device are supported on the sliding block (214), and the height of the granulator (219) can be adjusted by adjusting the distance between the sliding block (214) and the fixing bracket (215) through rotating bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810160126.3A CN108285942B (en) | 2018-02-26 | 2018-02-26 | Granulator with cooling function and driving system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810160126.3A CN108285942B (en) | 2018-02-26 | 2018-02-26 | Granulator with cooling function and driving system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108285942A CN108285942A (en) | 2018-07-17 |
| CN108285942B true CN108285942B (en) | 2020-05-22 |
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| CN109371185A (en) * | 2018-11-14 | 2019-02-22 | 重庆大学 | A kind of granulation system with thermal protection function |
| CN110455094B (en) * | 2019-07-18 | 2021-08-03 | 派罗特克（广西南宁）高温材料有限公司 | Molten metal stirring mechanism with flow guide heat dissipation ring |
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| CN106282447A (en) * | 2016-09-21 | 2017-01-04 | 重庆大学 | There is the slag dry granulation waste-heat recovery device of self-regulation and Anti-slagging function |
| CN106939363A (en) * | 2017-02-28 | 2017-07-11 | 西安交通大学 | For molten slag dry-type centrifugal granulation and the system and control method of waste heat recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106282447A (en) * | 2016-09-21 | 2017-01-04 | 重庆大学 | There is the slag dry granulation waste-heat recovery device of self-regulation and Anti-slagging function |
| CN106939363A (en) * | 2017-02-28 | 2017-07-11 | 西安交通大学 | For molten slag dry-type centrifugal granulation and the system and control method of waste heat recovery |
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