Centrifugal granulating device capable of preventing high-temperature melt slip and blocking

Abstract

The application discloses a centrifugal granulation device capable of preventing high-temperature melt slip and blocking and clogging, wherein high-temperature liquid melt flows to a rotating cup of a granulation unit from a melt storage unit through a flow guide mechanism, and the high-temperature liquid melt is granulated into small droplets by centrifugal force of the high-speed rotating cup; the small droplets perform flight heat exchange in a granulation bin with a heated surface and are solidified into particles; heat recovery of the high-temperature melt particles is completed by spraying far-infrared paint and installing a water-cooled wall with an anti-abrasion grid in the granulation bin, so that water-cooled wall abrasion and semi-melted particle wall sticking are prevented. In addition, by means of a special rotating cup mechanism, the high-temperature melt slip phenomenon on the rotating cup is prevented, so that the granulation effect is poor. The device adopts the flow guide mechanism and the special rotating cup structure and the recovery heat exchange device, so that the problems of high-temperature melt slip and wall sticking in the centrifugal granulation process are avoided, and the device can be effectively applied to high-temperature liquid melt granulation and waste heat recovery.

Description

Technical Field

[0001] This invention belongs to the field of high-temperature liquid melt waste heat recovery technology, specifically relating to a centrifugal granulation device for preventing high-temperature melt slippage and adhesion blockage. Background Technology

[0002] Dry slag granulation and waste heat recovery technology is a treatment method that rapidly breaks down and solidifies liquid melt into small particles with minimal water consumption, and utilizes air as a heat storage medium to fully contact and exchange heat with the slag particles, thereby recovering waste heat. Among these methods, centrifugal granulation is the most promising slag treatment method due to its advantages of low energy consumption, good granulation effect, simple and compact equipment, and controllable particle size and morphology.

[0003] A common dry centrifugal granulation waste heat recovery process consists of two parts: a granulation chamber and a heat exchange bed. The basic process is as follows: high-temperature melt is injected from the top of the device and impacts a high-speed rotating granulator, which is granulated under centrifugal action. The granulated melt particles are then initially cooled in the granulation chamber and finally enter the heat exchange bed for secondary cooling and waste heat recovery.

[0004] Currently, during centrifugal granulation, low-viscosity and high-surface-tension melts tend to slip on the high-speed granulator, resulting in poor granulation. Conversely, high viscosity and low surface tension can easily lead to slag and fiber buildup, causing motor jamming. Furthermore, the height of the centrifuged melt particles makes semi-molten particles highly susceptible to adhering to the granulation chamber wall, deteriorating heat exchange. After granulation, the particles bounce off the wall and tend to concentrate near the chamber wall, increasing the probability of semi-molten particle adhesion and severely impacting the system's heat exchange efficiency. Therefore, preventing melt slippage on the granulator and enhancing melt particle size are crucial for stable melt granulation and ensuring the safe and stable operation of the dry granulation system, as well as guaranteeing the uniformity of the melt particles. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a centrifugal granulation device for preventing slippage and adhesion of high-temperature melts, which addresses the shortcomings of the prior art and solves the technical problems of preventing slippage, adhesion and improving granulation efficiency during the centrifugal granulation of high-temperature liquid melts.

[0006] The present invention adopts the following technical solution:

[0007] A centrifugal granulation device for preventing high-temperature melt slippage and adhesion blockage includes a high-temperature melt storage unit disposed at the top of the granulation chamber, the high-temperature melt storage unit being used to keep the high-temperature melt at a certain temperature, a granulation unit for granulating the high-temperature melt into droplets disposed in the granulation chamber below the high-temperature melt storage unit, and a heat recovery unit for reducing the temperature of the particles and recovering the particles disposed inside the granulation chamber.

[0008] Preferably, the high-temperature melt storage unit includes a storage unit disposed at the top of the granulation chamber, and the bottom of the storage unit is connected to the interior of the granulation chamber through a flow guiding mechanism.

[0009] More preferably, the outlet of the flow guiding mechanism is directly opposite the center of the granulation unit.

[0010] Preferably, the granulation unit includes a rotating cup, the lower part of which is connected to a motor via a rotating shaft and a coupling.

[0011] More preferably, a liquid-breaking cone is provided at the center of the rotating cup, and edge serrations are provided at intervals along the outer circumference of the rotating cup.

[0012] More preferably, grooves are provided at intervals on the outer circumference of the rotor.

[0013] Preferably, the heat recovery unit includes a water-cooled wall and a particle heat exchange and collection device. The water-cooled wall is arranged on the wall of the granulation chamber, and the particle heat exchange and collection device is located at the bottom of the granulation chamber.

[0014] More preferably, a sidewall air device is provided on the water-cooled wall.

[0015] More preferably, the inner surface of the water-cooled wall is coated with far-infrared paint or carbide paint.

[0016] More preferably, the particle heat exchange collection device adopts a mechanical grate or a drum cooler.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] This invention discloses a centrifugal granulation device for preventing slippage and adhesion of high-temperature melt. A high-temperature melt storage unit is used to keep the high-temperature melt warm and is located at the top of the granulation chamber. A granulation unit is used to granulate the high-temperature melt flowing out of the storage unit into droplets and is located at the center of the granulation chamber. A heat recovery unit is used to reduce the temperature of the particles and recover the particles. This invention solves the problems of slippage and adhesion during the centrifugal granulation of high-temperature melt and recovers high-quality waste heat during the granulation process.

[0019] Furthermore, in order to achieve good granulation and avoid slippage of the high-temperature melt, the outlet of the flow guiding mechanism is directly opposite the center of the rotating cup.

[0020] Furthermore, the rotor employs methods including, but not limited to, increasing surface roughness, adding grooves, and edge serrations to prevent the high-temperature melt from slipping and sticking.

[0021] Furthermore, the water-cooled wall is coated with materials including but not limited to far-infrared coatings and carbide coatings; and anti-wear beams, anti-wear grids, and side wall ventilation are added to enhance heat exchange between the water-cooled wall and the high-temperature melt and prevent high-temperature melt particles from wearing off and sticking to the water-cooled wall.

[0022] Furthermore, the heat collection device for the particles employs devices including, but not limited to, mechanical grates and drum coolers to recover waste heat from the particles.

[0023] In summary, this invention avoids the problems of slippage and adhesion to the wall that occur during the centrifugal granulation of high-temperature melts, and can be effectively applied to the granulation of high-temperature liquid melts and the recovery of residual heat.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the system of the present invention;

[0026] Figure 2 A schematic diagram of a rotating cup with serrated edges and a liquid-breaking cone;

[0027] Figure 3 This is a schematic diagram of a grooved rotor.

[0028] The components include: 1. Melt storage unit; 2. Flow guiding mechanism; 3. Granulation bin; 4. Water-cooled wall; 5. Side wall air device; 6. Rotary cup; 601. Edge serration; 602. Liquid breaking cone; 603. Groove; 7. Rotary shaft; 8. Coupling; 9. Motor; 10. Particle heat exchange and collection device. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "one side," "one end," and "one side," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0033] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0034] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0035] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0036] This invention provides a centrifugal granulation device to prevent slippage and adhesion / blockage of high-temperature melt. High-temperature liquid melt flows from a melt storage unit to a rotating cup in the granulation unit via a flow guiding mechanism. The centrifugal force of the high-speed rotating cup granulates the high-temperature liquid melt into small droplets. These droplets undergo heat exchange in the granulation chamber, which has a heated surface, and then solidify into particles. Heat recovery of the high-temperature melt particles is achieved within the granulation chamber through a water-cooled wall coated with far-infrared paint and fitted with anti-wear grids, preventing water-cooled wall wear and adhesion of semi-molten particles. Furthermore, a special rotating cup mechanism prevents slippage of the high-temperature melt on the rotating cup, which would otherwise result in poor granulation. This invention's device, employing a flow guiding mechanism, a specially designed rotating cup structure, and a heat recovery and exchange device, avoids the problems of slippage and adhesion of the high-temperature melt during centrifugal granulation, and can be effectively applied to the granulation of high-temperature liquid melts and the recovery of residual heat.

[0037] Please see Figure 1 The present invention provides a centrifugal granulation device for preventing high-temperature melt slippage and adhesion blockage, comprising a high-temperature melt storage unit, a granulation unit, and a heat recovery unit.

[0038] The high-temperature melt storage unit is located at the top of the granulation chamber 3 to keep the high-temperature melt warm. The granulation unit is located at the center of the granulation chamber 3 to granulate the high-temperature melt flowing out of the storage unit into droplets. The heat recovery unit is located inside the granulation chamber 3 to reduce the temperature of the particles and to recover the particles.

[0039] The high-temperature melt storage unit includes a storage unit 1 and a flow guiding mechanism 2; the storage unit 1 is located at the top of the granulation chamber 3, and the bottom of the storage unit 1 is connected to the interior of the granulation chamber 3 through the flow guiding mechanism 2.

[0040] The granulation unit includes a rotating cup 6, a rotating shaft 7, a coupling 8, and a motor 9. The rotating cup 6 is located directly below the flow guiding mechanism 2, and the bottom of the rotating cup 6 is connected to the motor 9 via the rotating shaft 7 and the coupling 8.

[0041] Preferably, in order to achieve good granulation and avoid slippage of the high-temperature melt, the outlet of the flow guiding mechanism 2 is directly opposite the center of the rotating cup 6.

[0042] Please see Figure 2 and Figure 3 The surface of the rotating cup 6 is protected against slippage and adhesion of the high-temperature melt by means including but not limited to increasing surface roughness, adding grooves 603 and edge serrations 601.

[0043] Specifically, a liquid-breaking cone 602 is provided at the center of the rotating cup 6, and edge serrations 601 or grooves 603 are provided at intervals along the outer circumference of the rotating cup 6.

[0044] The heat recovery unit includes a water-cooled wall 4, a side wall air device 5, and a particle heat exchange collection device 10 located at the bottom of the granulation chamber 3, arranged on the wall of the granulation chamber 3.

[0045] High-temperature liquid melt enters the granulation chamber 3 from the melt storage unit 1 through the flow guiding mechanism 2, and falls into the rotating cup 6 for granulation. The granulated high-temperature liquid melt droplets fly and exchange heat in the granulation chamber 3. The high-temperature liquid melt droplets are cooled by the water-cooled wall 4 and the side wall air 5, causing the droplets to solidify into particles. After the particles recover residual heat at the bottom, they are discharged from the system through the particle heat recovery device 10.

[0046] Preferably, the water-cooled wall 4 is coated with, but is not limited to, far-infrared coatings and carbide coatings; and the water-cooled wall 4 is enhanced by adding anti-wear beams, anti-wear grids, and side wall air devices 5, etc., to prevent the high-temperature melt particles from wearing away and sticking to the water-cooled wall 4.

[0047] Far-infrared coating is an energy-saving coating with special functions. It can withstand high temperatures, up to 1700℃, and has a high emissivity (0.95), good corrosion resistance, and high wear resistance. This coating is mainly used to coat the inner wall of kilns. Through the infrared radiation of the coating, it improves heat exchange in the furnace, increases the temperature field strength and uniformity in the furnace, and makes the fuel burn more completely, thereby increasing thermal efficiency, reducing energy consumption, saving energy, and extending the service life of the furnace lining.

[0048] Carbide coatings are a type of coating with special functions, typically used to prevent carbonization of metal surfaces or to provide a protective carbide layer. These coatings can form a hard, protective carbide layer at high temperatures to prevent oxidation, corrosion, or wear on metal surfaces.

[0049] Wear-resistant beams are used to reduce or avoid wear problems in boiler water-cooled wall tubes. They are usually made of refractory and wear-resistant materials, such as wear-resistant castables, and their structure is generally a beam-like structure protruding from the surface of the water-cooled wall tube.

[0050] Abrasion gratings are devices used to prevent materials or gases from causing wear on equipment surfaces. They are typically made of wear-resistant materials, such as wear-resistant alloy steel or ceramics, and are characterized by their durability, wear resistance, and corrosion resistance. The structural design of abrasion gratings optimizes the flow field, reduces the impact and cutting forces of material particles on the equipment surface, thereby reducing wear and extending the service life of the equipment.

[0051] Furthermore, the particle heat exchange collection device 10 employs devices including but not limited to mechanical grates and drum coolers to recover waste heat from the particles.

[0052] Mechanical grates use mechanical movement to agitate and mix waste, and control its residence time within the furnace to ensure complete combustion. They offer advantages such as large processing capacity, high operational reliability, short processing cycles, significant waste reduction, thorough waste neutralization, and the ability to recover waste heat from incineration.

[0053] A drum cooler, also known as a drum slag cooler or drum-type slag cooler, is an important auxiliary device in circulating fluidized bed boilers. Its main function is to cool the high-temperature slag discharged from the boiler to meet the requirements for slag treatment and comprehensive utilization. The working principle of a drum cooler is to use the flue gas or water cooling system in the boiler's tail flue as the cooling medium. The rotation of the drum facilitates heat exchange between the high-temperature slag and the cooling medium, thereby achieving the cooling purpose.

[0054] The working principle of the centrifugal granulation device for preventing high-temperature melt slippage and adhesion blockage of the present invention is as follows:

[0055] High-temperature liquid melt enters the granulation chamber from the melt storage unit through the flow guiding mechanism, falls into the rotating cup for granulation, and the granulated high-temperature liquid melt droplets fly and exchange heat in the granulation chamber. The high-temperature molten droplets are cooled by water-cooled walls and side wall air in the granulation chamber, and the cooling causes the droplets to solidify into particles. By coating with far-infrared coating and adding anti-wear beams, the heat exchange between the particles and the water-cooled walls is enhanced and the wear of the particles on the water-cooled walls is reduced. After the particles recover residual heat at the bottom, they are discharged from the system through the particle heat exchange recovery device.

[0056] In summary, the present invention provides a centrifugal granulation device for preventing high-temperature melt slippage and adhesion blockage. It employs a flow guiding mechanism, a specially designed rotating cup structure, and a heat recovery and exchange device to avoid the problems of slippage and wall adhesion of high-temperature melt during centrifugal granulation. It can be effectively applied to the granulation of high-temperature liquid melt and the recovery of residual heat.

[0057] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A centrifugal granulation apparatus for preventing high temperature melt slip and blocking, characterized by, The high-temperature melt storage unit is arranged on the top of the granulation bin (3) and is used for heat preservation of the high-temperature melt; the granulation bin (3) below the high-temperature melt storage unit is provided with a granulation unit for granulating the high-temperature melt into liquid drops; the inside of the granulation bin (3) is provided with a heat recovery unit for reducing the temperature of the particles and recovering the particles; The granulation unit comprises a rotating cup (6), the lower portion of the rotating cup (6) is connected with a motor (9) through a rotating shaft (7) and a coupling (8), the center of the rotating cup (6) is provided with a liquid breaking cone (602), the outer side of the rotating cup (6) is circumferentially and interval provided with edge serrations (601), and the outer side of the rotating cup (6) is circumferentially and interval provided with grooves (603); The heat recovery unit comprises a water-cooled wall (4) and a particle heat exchange collecting device (10), the water-cooled wall (4) is arranged on the wall of the granulation bin (3), the particle heat exchange collecting device (10) is located at the lower portion of the granulation bin (3), the water-cooled wall (4) is provided with a side wall air device (5), and the inner side surface of the water-cooled wall (4) is provided with a far infrared paint.

2. The centrifugal granulation apparatus for preventing high temperature melt slip and blocking clogging according to claim 1, characterized by, The high-temperature melt storage unit comprises a storage unit (1), the storage unit (1) is arranged on the top of the granulation bin (3), and the bottom of the storage unit (1) is communicated with the inside of the granulation bin (3) through a flow guide mechanism (2).

3. The centrifugal granulation apparatus for preventing high temperature melt slip and blocking clogging according to claim 2, characterized by, The outflow port of the flow guide mechanism (2) is opposite to the center of the granulation unit.

4. The high temperature melt slip and blocking plug resistant centrifugal granulation apparatus of claim 1, wherein, The particle heat exchange collecting device (10) adopts a mechanical grate or a drum cooler.

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