CN113913568B - Granulation chamber of granulation device - Google Patents

Granulation chamber of granulation device Download PDF

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Publication number
CN113913568B
CN113913568B CN202111326539.2A CN202111326539A CN113913568B CN 113913568 B CN113913568 B CN 113913568B CN 202111326539 A CN202111326539 A CN 202111326539A CN 113913568 B CN113913568 B CN 113913568B
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China
Prior art keywords
cone
water
cooling
granulating
granulation
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CN202111326539.2A
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CN113913568A (en
Inventor
朱立江
张富信
张金良
路凯华
黄超
黄忠源
刘猛
柏赟
张�杰
马煜真
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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
    • 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
    • C21B2400/052—Apparatus features including rotating parts
    • C21B2400/054—Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis
    • 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
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Abstract

The invention discloses a granulating chamber of a granulating device, which comprises a water-cooling top plate, an upper cone, an inner cone, a middle ring section and a lower cone, wherein the upper cone is in an annular frustum shape, the inner cone is in a cone shape, the upper cone and the inner cone are coaxially arranged at intervals up and down, the lower cone surrounds the outer side of the inner cone, a discharge port for discharging granulated slag is connected between the lower cone and the inner cone, a middle ring section is arranged between the lower cone and the upper cone, an annular space for granulating the molten slag is formed among the upper cone, the inner cone, the lower cone and the middle ring section, the water-cooling top plate is connected with the top end of the upper cone in a sealing manner, an opening for allowing the molten slag to enter the granulating chamber is arranged in the center of the water-cooling top plate, the granulating disc extends upwards from the top of the inner cone, the top end of the granulating disc is provided with a disc surface for receiving the molten slag, the granulating disc is driven to rotate by a driving mechanism, and the middle ring section is provided with a first blast port for feeding first cooling air into the granulating chamber. The invention can avoid the slag adhesion phenomenon of the upper cone manufactured by welding during dry granulation.

Description

Granulation chamber of granulation device
Technical Field
The invention relates to the technical field of smelting slag treatment, in particular to a granulating chamber of a granulating device.
Background
In the production process of the steel industry, a large amount of waste heat and residual energy is generated, most of the waste heat and residual energy is well utilized, but sensible heat and low-temperature waste heat resources of high-temperature liquid slag are not well recycled, the high-temperature liquid slag is a byproduct in the steel production process, the discharge temperature of the high-temperature liquid slag is as high as 1500 ℃, and a large amount of high-temperature waste heat is contained.
The current waste heat recovery method adopts dry granulation, as shown in fig. 1, a rotating disc 1 rotating at a high speed in a granulation chamber 2 is utilized to expand and throw high-temperature liquid slag flowing from the upper part of the rotating disc from the center of the disc to the periphery, the high-temperature liquid slag is crushed, torn and contracted into fine liquid particles under the multiple actions of viscous force, surface tension, gravity, air resistance and the like at the moment of leaving the edge of the rotating disc, and the liquid particles exchange heat with cold air around the liquid particles in the flying process and are solidified to form solid particles or semi-solid particles. In the process, the heat of the high-temperature liquid slag is absorbed by the heat-exchanged air, so that the waste heat is recovered.
However, most of the existing granulating chambers are installed on the top by welding, the welding workload is large, and the granulating chambers cannot be disassembled after welding. Moreover, because the structure and material properties of the weld joint are changed, the cooling of the weld joint may be different from other positions, which may result in the incomplete cooling of the weld joint, and the weld joint has a relatively high roughness and is not smooth enough, so that slag colliding with the weld joint is adhered and cannot be granulated effectively.
Disclosure of Invention
In order to solve the problems, the invention provides a granulating chamber of a granulating device, which comprises a water-cooling top plate, an upper cone, an inner cone, a middle ring section and a lower cone, wherein the upper cone is in an annular frustum shape, the inner cone is in a cone shape, the upper cone and the inner cone are coaxially arranged at intervals up and down, the lower cone surrounds the outer side of the inner cone, a discharge port for discharging granulated slag is connected between the lower cone and the inner cone, the middle ring section is arranged between the lower cone and the upper cone, and an annular space for granulating the molten slag is formed among the upper cone, the inner cone, the lower cone and the middle ring section,
the water-cooling top plate is connected with the top end of the upper cone in a closed mode, an opening for enabling molten slag to enter the granulating chamber is formed in the center of the water-cooling top plate, the granulating disc extends upwards from the top of the inner cone, the top end of the granulating disc is provided with a disc surface used for containing the molten slag, the granulating disc is driven to rotate by the driving mechanism, and the middle ring section is provided with a first blast hole used for feeding first cooling air into the granulating chamber.
Optionally, the upper cone comprises an upper cone frame and a water-cooling baffle, the upper cone frame is in an annular frustum shape and is provided with an upper circular ring and a lower circular ring which are used for bearing the upper end and the lower end of the water-cooling baffle, a plurality of hollow areas are uniformly distributed in the circumferential direction between the upper circular ring and the lower circular ring, connecting ribs are arranged between the hollow areas, so that a connecting structure with the water-cooling baffle is formed between the upper circular ring and the lower circular ring and between the upper circular ring and the connecting ribs, and the water-cooling baffle is installed on the upper cone frame through a fastener upwards from the inside of the upper cone frame.
Optionally, the water-cooling baffle includes by lower supreme first bottom plate, first water tank, and the width of first bottom plate surpasss one section distance in bottom surface one side of first water tank, forms to press and folds the border, is provided with the first sealing material of round at the top surface of first water tank, and first sealing material forms low avris and high avris at the width direction of water-cooling baffle, just high avris with the same one side of the width direction at the water-cooling baffle is followed to the fold limit for the slope of water-cooling baffle and the fold limit are followed and are folded on adjacent water-cooling baffle, thereby form the form of in turn pressing along the circumferencial direction.
Optionally, the water-cooled baffle is installed in such a way that the direction from the lower side to the upper side is the same as the rotation direction of the granulating disk.
Optionally, the water-cooled top plate comprises a second bottom plate and a second water tank from bottom to top, a circle of second sealing material is arranged on the top surface of the second water tank, and the water-cooled top plate is fixed on the upper cone frame through a fastener from the inside of the upper cone frame.
Optionally, the bottom of the first base plate is a polished smooth flat surface.
Optionally, the inner face of the inner cone is cooled by a water cooled jacket or coil.
Optionally, a second air blowing port is further disposed on the lower cone, and a second cooling air is blown into the granulating chamber through the second air blowing port.
Optionally, the plate surface of the water-cooling baffle is trapezoidal.
Optionally, the bottom of the second base plate is a polished smooth flat surface.
The granulating chamber of the granulating device has the following beneficial effects:
(1) When the upper cone manufactured by adopting a welding mode is granulated, the welding seam is not cooled in place due to the change of the thickness and the material performance of the welding seam and other areas of the upper cone, the roughness of the welding seam is large and not smooth enough, and the slag adhesion phenomenon is easy to occur. .
(2) A large amount of welding operation work is reduced, and the danger of high-altitude welding operation is avoided.
(3) The whole structure is compact, and the occupied space is small.
(4) Because the upper cone is formed by adopting the fasteners to be pressed and overlapped one by one, the installation and the disassembly are convenient, and the granulation chamber can be conveniently displaced.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic diagram showing a prior art granulation apparatus;
FIG. 2 is a schematic view showing a granulating chamber of a granulating apparatus according to an embodiment of the present invention;
FIG. 3 is a top view of an upper cone frame illustrating an embodiment of the present invention;
FIG. 4 is a plan view showing a water-cooled damper according to an embodiment of the present invention in an installed state;
FIG. 5 is a front view of a water-cooled baffle plate illustrating an embodiment of the present invention;
FIG. 6 is a schematic diagram showing a water-cooled baffle stack according to an embodiment of the present invention;
FIG. 7 is a front view of a water-cooled roof panel showing an embodiment of the present invention;
fig. 8 is a side view showing a water-cooled ceiling plate according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive on the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
The granulation chamber of the granulation apparatus of the present embodiment, as shown in fig. 2, includes an upper cone 10, a water-cooled top plate 20, a granulation disc 30, an inner cone 40, an intermediate ring section 60, and a lower cone 70, where the upper cone 10 is in a circular frustum shape, the inner cone 40 is also in a conical shape, and both are in a form gradually rising from the periphery to the center, and the upper cone 10 and the inner cone 40 are coaxially arranged at an interval from top to bottom, forming a space between the inner cone 40 and the upper cone 10. The lower cone 70 surrounds the outer side of the inner cone 40 below the upper cone 10, and a discharge opening 71 for discharging granulated slag is connected between the lower cone and the inner cone 40. Between the lower cone 70 and the upper cone 10 is the middle ring section 60, an annular space is formed between the upper cone 10, the inner cone 40, the lower cone 70 and the middle ring section 60, and the middle ring section 60 has a first blast port 61 for feeding a first cooling air (which is a circumferential air in the annular space) into the granulating chamber.
At the top end of the upper cone 10, a water-cooled roof 20 is coaxially connected to the top end of the upper cone 10 for plugging the top surface of the granulation chamber. The water-cooled roof 20 is a ring-shaped structure, which can be made into an integral type or a split type, and the structure is schematically shown in fig. 3, and the center of the water-cooled roof is used for supplying high-temperature molten slag into the granulating chamber.
The inner cone 40 is a conical structure with a smooth outer surface to facilitate the sliding of the granulated slag off its surface after granulation. The granulating disk 30 extends from the top of the inner cone 40 and has a disk surface at the top for receiving molten slag, and the disk surface can be horizontal or concave. The granulating disk 30 is rotated by a driving mechanism thereof, and the inner surface of the inner cone 40 is cooled by a water-cooling jacket or a water-cooling coil.
In fig. 2, solid arrows indicate a flow path of the air supply, dotted arrows indicate a movement path of the molten slag, and the molten slag having a high temperature enters the granulation chamber from the center of the water-cooled ceiling 20, falls on the upper surface of the granulation disk 30, flies out from the edge thereof with the rotation of the granulation disk 30, and exchanges heat with the first cooling air, thereby completing primary granulation. The slag continues to fly and undergoes secondary granulation after collision with the upper cone 10 while exchanging heat with the water-cooled baffles, and the granulated slag subsequently falls downward under the action of gravity, wherein the granulated slag falling onto the inner cone slides downward on its smooth surface. During the dropping process, heat exchange is continued with the first cooling air introduced into the granulation chamber.
Further, a second blast hole 72 is further formed in the lower cone 70, and second cooling air can be fed into the granulating chamber 2 through the second blast hole 72, so that granulated slag falling from the granulating chamber can be continuously blown to move circularly, accumulation and adhesion of particles are prevented, and heat exchange with the cooling air is more sufficient.
The upper cone 10 is of a laminated structure without a welding seam, a plurality of water-cooling baffles 11 are sequentially stacked in the circumferential direction, specifically, the water-cooling baffles 11 are installed by using an upper cone frame 50, as shown in fig. 3, the upper cone frame 50 serves as a framework of the upper cone 10, and the upper cone frame can be made into an integral type or a split type. The upper cone frame 50 is in an annular frustum shape, and has an upper circular ring 53 and a lower circular ring 54 for receiving the upper end and the lower end of the water-cooling baffle 11, a plurality of hollow areas 51 are uniformly distributed in the circumferential direction between the upper circular ring 53 and the lower circular ring 54, and connecting ribs 52 are arranged between the hollow areas, so that a connecting structure with the water-cooling baffle 11 is formed between the upper circular ring 53, the lower circular ring 54 and the connecting ribs 52.
As shown in fig. 4 to 6, the shape of the plate surface of the water-cooled baffle is trapezoidal, and the water-cooled baffle 11 includes a first bottom plate 111 and a first water tank 112 from bottom to top, wherein the first bottom plate 111 is a polished smooth plane, so that the slag particles are not easy to adhere when colliding with the first bottom plate 111. The width of the first bottom plate 111 exceeds a side of the bottom surface of the first water tank 112 by a distance to form a stacking edge 116. The first water tank 112 may be a shell structure welded by steel plates, and has a first water inlet 114 and a second water outlet 115 at the top end thereof, and may be cooled by introducing circulating cooling water, and flow channels of different structures may be provided inside the tank body to increase the cooling effect. A first sealing groove is formed in the top surface of the first water tank 112, a first sealing material 113 is installed in the first sealing groove, and the first sealing groove has different groove depths at both sides of the water-cooling baffle plate 11 in the width direction, so that the heights of both sides are different after the first sealing material 113 is installed. The water-cooled baffle 11 is mounted on the upper cone frame 50 from the inside of the upper cone frame 50 upward so that the sealing material is attached to the upper cone frame 50. Specifically, the water-cooled panels 11 are each fixed by bolts to be fitted with the connecting ribs 52 and the upper and lower rings 53 and 54, thereby pressing the sealing material. Due to the different heights of the sealing material, the water-cooled baffles 11 are inclined when being attached to the upper cone frame, and the overlapping edge 116 presses upwards on the side, opposite to the overlapping edge, of the adjacent water-cooled baffle 11, and is overlapped for a circle in the circumferential direction in sequence, so that the effect of pressing one water-cooled baffle against the other water-cooled baffle is achieved. The gap between the adjacent water-cooled baffles 11 is related to the difference in height between the two sides of the first sealing material 113.
Preferably, the water-cooled baffle 11 is installed such that the direction from the lower side to the upper side of the first sealing material 113 coincides with the rotation direction of the granulating disk, as indicated by the arrow in fig. 2, so that the slag particles collide only with the plate surface of the water-cooled baffle and do not collide with the side surface of the water-cooled baffle 11 in flight.
As shown in fig. 7 to 8, the water-cooled top plate 20 may be fixed to the upper cone frame by bolts. The water-cooled top plate 20 comprises a second bottom plate 21 and a second water tank 22, wherein the bottom of the second bottom plate 21 is a polished smooth plane, and the purpose of polishing is that slag particles are not easy to adhere. The second water tank 22 is a shell structure welded by steel plates on the upper surface of the first bottom plate 21, and has a second water inlet 24 and a second water outlet 25, and cooling is performed by introducing circulating cooling water, and flow channels with different structures can be arranged inside the tank body to increase the cooling effect. A second sealing groove is formed in the top surface of the second water tank 22, a second sealing material 23 is placed in the second sealing groove, and the water-cooled top plate 20 is sealed by the second sealing material 23 after being installed upward from the inside of the upper conical frame 50.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A granulating chamber of a granulating device is characterized by comprising a water-cooling top plate, an upper cone, an inner cone, a middle ring section and a lower cone, wherein the upper cone is in an annular frustum shape, the inner cone is in a cone shape, the upper cone and the inner cone are coaxially arranged at intervals up and down, the lower cone surrounds the outer side of the inner cone, a discharge outlet for discharging granulated slag is connected between the lower cone and the inner cone, the middle ring section is arranged between the lower cone and the upper cone, and an annular space for granulating the molten slag is formed among the upper cone, the inner cone, the lower cone and the middle ring section,
the water-cooled top plate is connected with the top end of the upper cone in a closed manner, the center of the water-cooled top plate is provided with an opening for slag to enter the granulating chamber, the granulating disc extends upwards from the top of the inner cone, the top end of the granulating disc is provided with a disc surface for receiving the slag, the granulating disc is driven to rotate by the driving mechanism, the middle ring section is provided with a first blast port for feeding first cooling air into the granulating chamber,
the upper cone comprises an upper cone frame and a water-cooling baffle, the upper cone frame is in an annular frustum shape, and is provided with an upper circular ring and a lower circular ring which are used for bearing the upper end and the lower end of the water-cooling baffle, a plurality of hollow areas are uniformly distributed on the circumference between the upper circular ring and the lower circular ring, and connecting ribs are arranged between the hollow areas, so that a connecting structure with the water-cooling baffle is formed between the upper circular ring and the lower circular ring and between the upper circular ring and the connecting ribs, the water-cooling baffle is upwards installed on the upper cone frame through a fastener by the inside of the upper cone frame, and the upper cone is formed by the fact that a plurality of water-cooling baffles are sequentially pressed and overlapped along the circumferential direction.
2. The granulation chamber of the granulation apparatus as claimed in claim 1,
the water-cooling baffle includes by lower supreme first bottom plate, first water tank, and the width of first bottom plate surpasss one section distance in bottom surface one side of first water tank, forms to press and folds the border, is provided with round first sealing material at the top surface of first water tank, and first sealing material forms low avris and high avris at the width direction of water-cooling baffle, just high avris with press the limit along the same one side at the width direction of water-cooling baffle for the slope of water-cooling baffle just presses the limit along pressing and folds on adjacent water-cooling baffle, thereby forms the form of pressing in proper order along the circumferencial direction.
3. The granulation chamber of the granulation apparatus as claimed in claim 2,
when the water-cooling baffle plate is installed, the direction from the low side to the high side is consistent with the rotating direction of the granulating disc.
4. The granulation chamber of the granulation apparatus as claimed in claim 1,
the water-cooling top plate comprises a second bottom plate and a second water tank from bottom to top, a circle of second sealing material is arranged on the top surface of the second water tank, and the water-cooling top plate is fixed on the upper cone frame through a fastening piece from the inside of the upper cone frame.
5. The granulation chamber of the granulation apparatus as claimed in claim 2,
the bottom of the first base plate is a polished smooth flat surface.
6. The granulation chamber of the granulation apparatus as claimed in claim 1,
the inner surface of the inner cone is cooled by a water-cooling jacket or a water-cooling coil pipe.
7. The granulation chamber of the granulation apparatus as claimed in claim 1,
and a second blast hole is also arranged on the lower cone, and second cooling air is sent into the granulating chamber through the second blast hole.
8. The granulation chamber of the granulation apparatus as claimed in claim 1,
the surface of the water-cooling baffle is trapezoidal.
9. The granulation chamber of the granulation apparatus as claimed in claim 4,
the bottom of the second base plate is a polished smooth flat surface.
CN202111326539.2A 2021-11-10 2021-11-10 Granulation chamber of granulation device Active CN113913568B (en)

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Publication number Priority date Publication date Assignee Title
CN114849588B (en) * 2022-05-18 2023-04-07 西安交通大学 Fly ash slag solidification molding granulation recovery system

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CN105624347B (en) * 2016-03-11 2018-12-07 西安交通大学 A kind of liquid high-temperature slag granulation and waste-heat recovery device
CN105779673A (en) * 2016-05-09 2016-07-20 于良富 Blast furnace slag thermal fracture centrifugal drying method granulation device and method
CN109385496B (en) * 2018-10-24 2020-06-23 青岛大学 Liquid slag mechanical centrifugal granulation anti-bonding device and preheating method thereof
CN112808161A (en) * 2020-12-30 2021-05-18 北京中冶设备研究设计总院有限公司 Granulation cooling device and granulation cooling method for molten material
CN112675781A (en) * 2020-12-30 2021-04-20 北京中冶设备研究设计总院有限公司 Granulation device and granulation method for molten material

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