CN113957184B - Slag granulating primary cooling section device and method - Google Patents

Slag granulating primary cooling section device and method Download PDF

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Publication number
CN113957184B
CN113957184B CN202111328359.8A CN202111328359A CN113957184B CN 113957184 B CN113957184 B CN 113957184B CN 202111328359 A CN202111328359 A CN 202111328359A CN 113957184 B CN113957184 B CN 113957184B
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China
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cooling
water
wall
outer ring
turning plate
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CN113957184A (en
Inventor
朱立江
张金良
张富信
路凯华
黄超
费利东
张磊
黄忠源
刘猛
薛曼龄
陈欣舒
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Beijing Metallurgical Equipment Research Design Institute Co Ltd
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Beijing Metallurgical Equipment Research Design Institute Co Ltd
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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
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • 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 slag granulating primary cooling section device and a slag granulating primary cooling section method. The primary cooling section device of slag granulation sets up between granulation room and discharging equipment, includes: the inner ring and the outer ring are both of jacket structures, cooling water is introduced into the jacket, an annular space is formed between the outer wall of the inner ring and the inner wall of the outer ring, a plurality of water-cooling turning plate structures are arranged in the annular space, the plurality of water-cooling turning plate structures are sequentially and alternately arranged on the outer wall of the inner ring and the inner wall of the outer ring from top to bottom, cooling water is introduced into the water-cooling turning plate structures, and slag particles are enabled to be folded line-shaped to descend and cooled in the annular space from top to bottom through the water-cooling turning plate structures. The invention can further cool the high-temperature slag particles after granulating and cooling in the granulating chamber, and avoids the situation that the slag particles are secondarily adhered due to short accumulation of overhigh temperature.

Description

Slag granulating primary cooling section device and method
Technical Field
The invention relates to the technical field of slag granulating devices, in particular to a slag granulating primary cooling section device and a slag granulating primary cooling section method.
Background
The main equipment for slag granulation generally comprises: granulating chamber (provided with granulating rotary table) and discharging device. In the actual use process, the inventor finds that the particle size of slag particles thrown out of the granulating turntable is often larger due to the influence of factors such as slag temperature, viscosity, rotating speed of the granulating turntable and the like, the cooling of the slag particles in the granulating chamber is insufficient, the temperature in the particles is still higher, and the problem that high-temperature slag particles are easily subjected to secondary adhesion and the like in a short time of accumulation in the discharging equipment is solved.
Disclosure of Invention
Based on the above, the invention aims to provide a slag granulating primary cooling section device and a slag granulating primary cooling section method, so as to solve the problems that the slag granulating cooling is insufficient, the temperature of slag particles is too high, and secondary adhesion is easy to occur due to short accumulation in the prior art.
The above object of the present invention is achieved by the following technical solutions:
according to a first aspect of the present invention, there is provided a slag granulating primary cooling stage apparatus, arranged between a granulating chamber and a discharging device, comprising: an inner ring and an outer ring, wherein,
the inner ring and the outer ring are both of jacket structures, and cooling water is filled in the jackets;
an annular space is formed between the outer wall of the inner ring and the inner wall of the outer ring, a multi-ring water-cooling turning plate structure is arranged in the annular space, the multi-ring water-cooling turning plate structure is sequentially and alternately arranged on the outer wall of the inner ring and the inner wall of the outer ring from top to bottom, cooling water is introduced into the water-cooling turning plate structure, and slag particles are enabled to be folded line-shaped to descend and cool in the annular space from top to bottom through the water-cooling turning plate structure.
Optionally, the water-cooling panel turnover structures are integrated annular structures, and one water-cooling panel turnover structure forms one circle on the outer wall of the inner ring/the inner wall of the outer ring.
Optionally, the water-cooling panel turnover structure is a fan-shaped structure, and a plurality of fan-shaped water-cooling panel turnover structures are circumferentially arranged along the outer wall/the inner wall of the inner ring to form a complete circumference.
Optionally, the water-cooling panel turnover structure includes: the device comprises a turning plate and a turning plate water cooling cavity for containing cooling water, wherein the turning plate water cooling cavity is positioned on the lower surface of the turning plate; the flap is inclined from its mounting wall towards below the centre of the annular space.
Optionally, the turning plate and the turning plate water cooling cavity are integrally formed. Optionally, the inner ring outer wall and the outer ring inner wall are both provided with a fixing device for fixing the water-cooling turning plate structure and a supporting frame for supporting the water-cooling turning plate structure, and the bottom of the turning plate water cooling cavity of the water-cooling turning plate structure is provided with a shape matched with the supporting frame.
Optionally, a first cooling water circulation channel is arranged in the flap water cooling cavity, and the tail end of the first cooling water circulation channel passes through the jacket of the inner ring/outer ring, so that an inlet and an outlet of the first cooling water circulation channel are positioned on one side of the inner wall/outer wall of the inner ring, which is fixedly installed by the water cooling flap structure.
Optionally, a space is formed between the tail end of the water-cooling turning plate structure on the outer wall of the inner ring and the tail end of the water-cooling turning plate structure on the inner wall of the outer ring in the vertical direction.
Optionally, the jackets of the inner ring and the outer ring are respectively provided with a second cooling water circulation channel for cooling water circulation. Optionally, the outlet of the second cooling water circulation channel is provided with an exhaust box, the longitudinal section of the exhaust box is L-shaped, the exhaust box comprises a side wall and a bottom edge, and the exhaust box is used for enabling the liquid level of the cooling water in the second cooling water circulation channel and the outlet to form a height difference so as to exhaust most of air remained at the outlet.
Optionally, the water inlet of the second cooling water circulation channel is located at the lower parts of the inner ring and the outer ring, the water outlet is located at the upper parts of the inner ring and the outer ring, the top end of the side wall of the exhaust box is higher than the water outlet, and the bottom edge is located below the water outlet and on the wall of the second cooling water circulation channel located at one side of the water outlet.
According to a second aspect of the present invention, there is provided a slag granulation primary cooling method comprising: the slag particles are cooled by the granulating chamber and then enter an annular space of the slag granulating primary cooling section device together with cold air, and the slag particles sequentially contact a water-cooling turning plate structure at the outer wall of the inner ring and a water-cooling turning plate structure at the inner wall of the outer ring, and continuously fall in a zigzag shape under the guiding action of the multi-ring water-cooling turning plate structure; the slag particles descend and contact and exchange heat with the water-cooling turning plate structure, the inner ring and the outer ring, so that a supplementary cooling process is completed before entering the discharging equipment.
Compared with the prior art, the primary cooling section device is additionally arranged between the granulating chamber and the discharging equipment, so that the temperature of slag particles treated in the granulating chamber can be further reduced through the primary cooling section device, the supplementary cooling is provided for high-temperature slag discharged from the granulating chamber, the cooling effect of the slag particles is integrally improved, and the problem of secondary adhesion caused by short accumulation of the slag particles is solved.
Drawings
FIG. 1 is a schematic diagram of the connection of a granulating chamber to a discharge apparatus without the addition of a primary cooling stage apparatus;
FIG. 2 is a schematic view of the installation structure of the primary cooling section device in the invention;
FIG. 3 is a top view of a slag granulation primary cooling stage apparatus in accordance with an embodiment of the present invention;
FIG. 4 is a schematic partial cross-sectional view of a slag granulation primary cooling stage apparatus in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the exhaust box in an embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of a slag granulating primary cooling apparatus according to an embodiment of the present invention.
In fig. 1-6, 10 granulation chamber, 11 granulation carousel; 20 primary cooling section device; 30 discharging equipment; 40 slag particles; 50, cold air; 21 inner ring, 22 outer ring, 23 second cooling water circulation channel, 231 water inlet, 232 water outlet, 233 exhaust box; 24 water-cooling plate structure, 241 plate, 242 plate water-cooling cavity, 243 inlet, 244 outlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 schematically shows the connection structure of the granulating chamber 10 and the discharging apparatus 30 without adding the primary cooling stage device 20. As shown in fig. 1, the slag granulating apparatus includes a granulating chamber 10 and a discharging apparatus 30 communicating with the granulating chamber 10. Wherein, the granulating chamber 10 is internally provided with a granulating rotary table 11, and the granulating chamber 10 is also provided with a cold air inlet. Specifically, as shown in fig. 1, the granulating rotary table 11 is disposed at the left side of the granulating chamber 10, and the cool air inlet is disposed at the right side of the granulating chamber 10. In the slag granulating device, in the using process, slag particles 40 are thrown out at a high speed through a granulating rotary table 11, the thrown slag particles 40 exchange heat with cold air 50 in a granulating chamber 10, the slag particles 40 enter a discharging device 30 after being cooled down, the cooled slag particles can be discharged from a finished slag outlet positioned at the bottom of the discharging device 30, and hot air after heat exchange can be discharged from a hot air outlet at the right side of the discharging device 30.
The present application recognizes the existence of granulation with the slag granulation apparatus described above: the cooling of the slag particles 40 in the granulating chamber 10 is insufficient, the temperature of the particles is high, and particularly, the temperature inside the particles is high, and secondary adhesion is very likely to occur when the high-temperature slag particles 40 are accumulated in a short time into the discharging device 30. Based on this, the inventors of the present application add the primary cooling stage device 20 between the granulating chamber 10 and the discharging apparatus 30. Fig. 2 schematically illustrates the mounting structure of the additional primary cooling stage apparatus 20. As shown in fig. 2, the primary cooling section device 20 is engaged between the granulating chamber 10 and the discharging apparatus 30. The upper and lower ends of the primary cooling section device 20 are respectively connected with the granulating chamber 10 and the discharging device 30 through flanges, and the flanges are preferably specially-made circular wide flanges so as to increase the connection area.
The invention provides a slag granulating primary cooling section device, which is shown by referring to fig. 2 and 4 and comprises an inner ring 21 and an outer ring 22, wherein the inner ring 21 and the outer ring 22 are of jacket structures, and cooling water is filled in a jacket; an annular space is formed between the outer wall of the inner ring 21 and the inner wall of the outer ring 22, a plurality of circles of water-cooling turning plate structures 24 are arranged in the annular space, the plurality of circles of water-cooling turning plate structures 24 are alternately arranged on the outer wall of the inner ring 21 and the inner wall of the outer ring 22 from top to bottom, cooling water is filled in the water-cooling turning plate structures 24, and slag particles 40 are enabled to fall in a fold line from top to bottom in the annular space and cooled through the water-cooling turning plate structures 24.
In the present invention, the first case: each turn on the inner and outer ring walls may be a turn formed by a separate annular water-cooled flap structure 24. Second case: each of the outer and inner ring walls may be formed into a complete perimeter by a plurality of fan-shaped water-cooled flap structures 24. Specifically, in the first case, the water-cooling flap structure 24 is an integral annular structure, and is sleeved on the outer wall of the inner ring or circumferentially mounted on the inner wall of the outer ring to form a complete circumferential ring. In the second case, that is, each ring is formed by a plurality of fan-shaped water-cooling plate structures 24, the plurality of fan-shaped water-cooling plate structures 24 are circumferentially arranged along the outer wall of the inner ring/the inner wall of the outer ring to form a complete circumference, as shown in fig. 3, the fan-shaped water-cooling plate structures 24 are preferably in close contact with each other, which is not limited to this, and a small gap can be reserved for installation convenience.
Fig. 4 schematically illustrates a partial cross-sectional structure of the primary cooling stage apparatus 20 in an embodiment of the present invention. As shown in fig. 4, the water-cooled flap structure 24 includes a flap 241 and a flap water-cooled cavity 242. Wherein, the panel turnover water cooling cavity 242 is positioned on the lower surface of the panel turnover 241 for containing circulating cooling water. The water cooling cavity and the turning plate 241 are preferably of an integral structure. The flap 241 is inclined from its installed wall to below the center of the annular space, specifically, the flap 241 on the outer wall of the inner ring is directed toward the outer ring 22, the flap 241 on the inner wall of the outer ring is directed toward the inner ring 21, that is, the flaps 241 in each turn on the outer wall of the inner ring 21 are arranged in a straight splayed shape, and the flaps 241 in each turn on the inner wall of the outer ring 22 are arranged in an inverted splayed shape. In order to ensure the cooling effect, in the present invention, it is preferable to provide at least two water-cooling flap structures 24 on the inner ring 21 or the outer ring 22.
The water-cooling turning plate structure 24 is fixedly connected with the outer wall of the inner ring or the inner wall of the outer ring through a fixing device. In an alternative embodiment, in order to improve the stability of the water-cooling panel turnover structure 24, a supporting frame may be further disposed on the outer wall of the inner ring and the inner wall of the outer ring, and the supporting frame is used to play an auxiliary supporting role on the water-cooling panel turnover structure 24. The support frame structure may be a common triangular or trapezoidal structure, see fig. 6. The bottom of the water cooling cavity 242 of the water cooling plate structure 24 has a shape adapted to the supporting frame. For example, as shown in fig. 4, the water cooling cavity 242 of the turning plate may be formed by connecting a cross plate, a first inclined plate and a second inclined plate, wherein an end of the first cross plate is installed on an outer wall of the inner ring or an inner wall of the outer ring, an end of the second inclined plate is in closed connection with an end of the turning plate 241, and an inclination of the first inclined plate may be the same as an inclination of the turning plate 241. The structure of the water cooling cavity 242 of the turning plate can be adapted to a common supporting frame, and a larger cavity is formed on one side of the water cooling turning plate structure 24 and the wall surface, so that more cooling water circulation pipelines can be contained, and more cold sources can be provided, so that particles can exchange heat.
In a preferred embodiment, as shown in fig. 4, the end of the water-cooling flap structure 24 on the outer wall of the inner ring and the end of the water-cooling flap structure 24 on the inner wall of the outer ring form a certain interval in the vertical direction, and the interval can make the high-temperature slag particles more effectively perform the fold line descending motion, and can avoid the phenomenon that the particles are accumulated on the flap 241.
In the water-cooling flap structure 24 of the present invention, a first cooling water circulation channel is disposed in the flap water cooling cavity 242, as shown in fig. 4, and the end of the first cooling water circulation channel passes through the jacket of the inner ring 21/outer ring 22, so that the inlet 243 and the outlet 244 of the first cooling water circulation channel are located on one side of the inner wall/outer wall of the inner ring where the water-cooling flap structure 24 is mounted and fixed, so as to facilitate operation.
As shown in fig. 4 and 5, the jackets of the inner ring 21 and the outer ring 22 are respectively provided with a second cooling water circulation channel 23 for circulating cooling water, so that a further water cooling cavity for circulating cooling water is formed. The cooling water is circulated in the device, so that the device/equipment can be protected from high-temperature ablation and deformation; on the other hand, the surfaces of the equipment with lower temperature, such as the outer wall of the inner ring and the inner wall of the outer ring, form contact cooling effect on the high-temperature granulated slag so as to supplement cooling on the high-temperature granulated slag discharged from the granulating chamber 10. Specifically, the slag particles 40 contact with the outer wall of the inner ring and the inner wall of the outer ring in the annular space while descending, and the particles exchange heat with the pipe wall cooled by the circulating cooling water, so that the slag particles 40 can exchange heat with the pipe wall and the water-cooling turning plate structure 24 in the annular space in a double manner, and after entering the discharging equipment 30 after heat exchange cooling, the possibility of secondary adhesion of the particles in the discharging equipment 30 is reduced or even avoided.
Fig. 5 schematically shows the structure of the exhaust box 233 in the slag granulation primary cooling stage apparatus of the present invention. In an alternative embodiment, as shown in fig. 5, in order to avoid air stagnation at the drain port 232 of the second cooling water circulation channel 23 of the jacket of the inner race 21 or the outer race 22, affecting the heat exchange effect of this region, a vent box 233 may also be provided at the drain port 232 of the second cooling water circulation channel 23. The cooling water in the second cooling water circulation passage 23 is made to be level-different from the drain port 232 by the air discharge box 233 to discharge most of the air trapped at the drain port 232. For example, the venting cassette 233 has an L-shaped longitudinal section, including a side wall and a bottom edge. The exhaust box 233 is preferably of a ring-shaped structure to be adapted to the shape of the inner ring 21 or the outer ring 22, thereby further securing the air-discharging effect.
In the present invention, it is preferable that the circulating cooling water in the second cooling water circulation passage 23 is in a lower-in upper-out form. Specifically, as shown in fig. 4, the water inlet 231 of the circulating cooling water of the second cooling water circulation channel 23 is located at the lower part of the inner ring 21/outer ring 22, the water outlet 232 is located at the upper part of the inner ring 21/outer ring 22, the top end of the side wall of the air outlet box 233 is higher than the water outlet 232, and the bottom edge is connected with the wall of the second cooling water circulation channel located below the water outlet 232 and at one side of the water outlet 232. The circulating cooling water can reach the drain port 232 (drain pipe is discharged) by first crossing the upper edge of the side wall of the exhaust box 233, so that the liquid level higher than the drain port 232 is formed in the second cooling water circulation channel 23, and the stagnant air above the drain port 232 can be forcibly discharged.
In an alternative embodiment, to reduce equipment process difficulties, the slag granulation primary cooling zone device 20 of the present invention may be a prismatic or cylindrical structure formed by splicing a plurality of unit structures. Fig. 3 and 6 schematically show a top view and a cross-sectional structure view, respectively, of a slag granulation primary cooling stage apparatus in an embodiment. As shown in fig. 3 and 6, the prism structure is specifically a prism structure formed by splicing a plurality of unit structures and having a polygonal cross section. The unit structure may include: the fan-shaped water-cooling turnover plate structure is arranged on the inner ring plate and the outer ring plate; the inner ring plates are spliced to form an inner ring 21, the outer ring plates are spliced to form an outer ring 22, and the fan-shaped water-cooling turnover plate structures positioned on the outer wall/the inner wall of the inner ring at the same height form a circle. Preferably, the inner ring plate and the outer ring plate are in a straight plate shape which is more convenient to process, and a plurality of inner ring plates and outer ring plates form a polygonal prismatic structure, so that the processing difficulty of equipment is greatly reduced. Of course, the shape of the inner ring plate and the outer ring plate is not limited to a straight plate shape, and the inner ring plate and the outer ring plate can be spliced to form a cylindrical structure. In this embodiment, the movement direction of the slag particles 40 through the primary cooling zone is changed continuously, thereby prolonging the residence time of the slag particles 40 in the annular space to some extent and prolonging the heat exchange time. In addition, the primary cooling section device 20 formed by splicing can be conveniently detached and cleaned subsequently, so that the time required for maintenance and replacement is reduced, and the production efficiency is further improved.
As shown in fig. 6, the fan-section water-cooling flap structures 24 of each unit structure have flap water-cooling cavities 242, and each flap water-cooling cavity 242 has a separate first cooling water circulation channel therein, that is, each fan-section water-cooling flap structure 24 has an inlet 243 and an outlet 244. The water-cooling turning plates 241 units located at the same height are in seamless connection after being spliced, so that all slag particles 40 are subjected to material ramming operation, and adhesion caused by the fact that the slag particles 40 directly fall to the discharging equipment 30 from the gaps under the condition that the gaps exist is avoided.
In an alternative embodiment, as shown in fig. 3, two inner rings 21 are formed into a group, and the groups are connected and fixed by using a connecting piece, and the connecting piece can be a flange, a bolt, or the like. Further, a support for installation and fixation is arranged at the joint of the two inner ring plates of each group and on the inner wall of the inner ring, and the support is connected with a steel structure support for fixation, so that the whole fixation of the inner ring 21 is realized. For example, the holders at both ends of the diameter of the inner ring 21 may be connected to be fixed. More preferably, a fixing frame may be disposed in the inner ring 21, for example, a polygonal prismatic structure having a smaller size than the inner ring 21 may be disposed, with the side surfaces of the fixing frame being opposite to the supports, and each support being fixedly connected to the fixing frame, thereby achieving fixing of the post-splicing primary cooling section device 20. The embodiment facilitates the installation and the disassembly through the two-by-one group, reduces the time required for maintenance and replacement, and further improves the cooling efficiency.
The invention provides a slag granulating and primary cooling method, which comprises the following steps: slag particles 40 enter an annular space of the primary cooling section device 20 together with cold air 50 after being cooled by the granulating chamber 10, sequentially contact a water-cooling turning plate structure 24 at the outer wall of the inner ring and the water-cooling turning plate structure 24 at the inner wall of the outer ring, and continuously fall in a zigzag shape under the guiding action of the water-cooling turning plate structures 24 at a plurality of circles; the slag particles 40 descend and simultaneously contact and exchange heat with the water-cooling turning plate structures 24, the inner ring 21 and the outer ring 22 in the annular space, so that a supplementary cooling process is completed before entering the discharging equipment 30, and secondary adhesion can not occur after the particles subjected to delayed heat exchange cooling enter the discharging equipment 30.
In the invention, the circulating cooling water in the water-cooling turning plate structure 24 can protect devices/equipment from high-temperature ablation and deformation on one hand; on the other hand, the surface of the equipment with lower temperature, such as the upper surface of the water-cooling turnover plate structure 24, has a contact cooling effect on the high-temperature granulated slag so as to supplement and cool the high-temperature granulated slag discharged from the granulating chamber 10. In the present invention, the water-cooled flap structure 24 has a guiding effect on the descending slag particles 40 in addition to the contact cooling effect through its upper surface. Specifically, the slag particles 40 are tamped sequentially through the water-cooling flap structures 24 on the outer wall of the inner ring and the inner wall of the outer ring, so that the high-temperature particles falling into the primary cooling section device 20 from the granulating chamber 10 change the movement path from original straight line falling to continuous repeated fold line falling, thereby prolonging the residence time of the high-temperature slag particles 40 in the device/equipment, in other words, prolonging the contact time of the granulated slag particles 40 with surrounding cold air 50. In addition, since the high temperature particles are continuously heat-exchanged with the surrounding cool air 50 while descending, the heat exchange time between the high temperature particles and the cool air 50 is prolonged. The high temperature slag particles 40 pass through the delayed heat exchange of the primary cooling section device 20, and no secondary adhesion occurs after reaching the discharging equipment 30.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (7)

1. The utility model provides a slag granulation primary cooling section device, its characterized in that sets up between granulation room and discharge equipment for receive granulation room exhaust high temperature slag and cold wind and carry out the supplementary cooling to high temperature slag, granulation room one side is equipped with cold wind import, discharge equipment one side is equipped with hot-blast export, slag granulation primary cooling section device includes: an inner ring and an outer ring, wherein,
the inner ring and the outer ring are both of jacket structures, and second cooling water circulation channels through which cooling water flows are arranged in the jackets;
an annular space is formed between the outer wall of the inner ring and the inner wall of the outer ring, the upper end of the annular space is connected with the bottom end of the granulating chamber through a flange, and the lower end of the annular space is connected with the discharging equipment through a flange; a plurality of circles of water-cooling turning plate structures are arranged in the annular space, and are alternately arranged on the outer wall of the inner circle and the inner wall of the outer circle from top to bottom in sequence, and the tail ends of the water-cooling turning plate structures positioned on the outer wall of the inner circle and the tail ends of the water-cooling turning plate structures positioned on the inner wall of the outer circle form a space in the vertical direction; cooling water is filled in the water-cooling turning plate structure, and slag particles are enabled to descend in the annular space from top to bottom in a fold line through the water-cooling turning plate structure and cooled;
the slag granulating primary cooling section device is formed by splicing a plurality of unit structures, wherein the unit structures comprise an inner ring plate, an outer ring plate and a fan-shaped water-cooling turning plate structure arranged on the inner ring plate and the outer ring plate; the inner ring plates are spliced to form an inner ring, the outer ring plates are spliced to form an outer ring, and a plurality of fan-shaped water-cooling turning plate structures positioned at the same height on the outer wall of the inner ring/the inner wall of the outer ring are spliced to form a ring in a seamless manner; each fan-shaped water-cooling turning plate structure is provided with an independent first cooling water circulation channel for internally communicating cooling water.
2. The apparatus of claim 1, wherein the water-cooled flap structure comprises: the device comprises a turning plate and a turning plate water cooling cavity for containing cooling water, wherein the turning plate water cooling cavity is positioned on the lower surface of the turning plate; the flap is inclined from its mounting wall towards below the centre of the annular space.
3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
the turning plate and the turning plate water cooling cavity are integrally formed;
the water-cooling turnover plate comprises an inner ring and an outer ring, wherein the inner wall of the inner ring is provided with a water-cooling turnover plate structure, the outer ring is provided with a water-cooling turnover plate structure, the water-cooling turnover plate structure is arranged on the inner ring, the outer ring is provided with a water-cooling turnover plate structure, the water-cooling turnover plate structure is arranged on the outer ring, the outer ring is provided with a fixing device for fixing the water-cooling turnover plate structure, and a supporting frame for supporting the water-cooling turnover plate structure is arranged on the inner ring, and the bottom of the water-cooling turnover plate.
4. The apparatus of claim 2, wherein the end of the first cooling water circulation channel passes through the jacket of the inner/outer ring such that the inlet and outlet of the first cooling water circulation channel is located on the side of the inner/outer ring wall to which the water-cooled flap structure is mounted.
5. The apparatus of claim 1, wherein a vent box is provided at the drain port of the second cooling water circulation passage, the vent box having an L-shaped longitudinal section including a side wall and a bottom edge, and a level difference between the cooling water level in the second cooling water circulation passage and the drain port is formed by the vent box to discharge air retained at the drain port.
6. The apparatus of claim 5, wherein the water inlet of the second cooling water circulation passage is located at lower portions of the inner ring and the outer ring, the water discharge opening is located at upper portions of the inner ring and the outer ring, the top end of the side wall of the air discharge box is higher than the water discharge opening, and the bottom edge is located at the wall of the second cooling water circulation passage below the water discharge opening and at one side of the water discharge opening.
7. A method of primary cooling using the apparatus of any one of claims 1-6, comprising:
splicing a plurality of unit structures into a slag granulating primary cooling section device, and respectively connecting the upper end and the lower end of the slag granulating primary cooling section device with a granulating chamber and a discharging device; slag particles are cooled by the granulating chamber and then enter the annular space together with cold air, and sequentially contact the water-cooling turning plate structure at the outer wall of the inner ring and the water-cooling turning plate structure at the inner wall of the outer ring, and continuously fall in a zigzag shape under the guiding action of the multi-ring water-cooling turning plate structure;
the slag particles descend and contact with the water-cooling turning plate structure, the inner ring and the outer ring for heat exchange, so that supplementary cooling is completed before entering the discharging equipment, the slag particles after supplementary cooling enter the discharging equipment, and hot air is discharged from a hot air outlet on one side of the discharging equipment after heat exchange.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190228256A (en) * 1902-12-22 1903-12-22 Hermann Passow An Improved Process and Means for the Treatment of Blast Furnace and other Slags.
KR101173498B1 (en) * 2010-12-28 2012-08-14 재단법인 포항산업과학연구원 Apparatus for granulation and sensible heat collection of melting slag
CN102268495B (en) * 2011-07-20 2013-01-02 北京中冶设备研究设计总院有限公司 Process technology and equipment for granulating blast-furnace slag and utilizing waste heat
CN209162105U (en) * 2018-12-12 2019-07-26 安徽工业大学 The blast furnace melt cinder baffling cooling treatment device of recyclable waste heat
CN112094967A (en) * 2020-08-19 2020-12-18 中冶南方都市环保工程技术股份有限公司 High-temperature slag disc slag cooler

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