Dry granulation device

Abstract

The utility model discloses a dry granulation device, which relates to the technical field of ceramic powder granulation and comprises a granulation tower. A distributor is arranged on the upper side of the granulation tower and comprises an outer cylindrical part and an inner cylindrical part; the outer side of the outer cylindrical part is connected with a high-pressure air inlet pipe and a feeding fan; a high-pressure water injection pipe is arranged on the upper side of the inner cylindrical part, and the lower side of the high-pressure water injection pipe serves as an output side and is provided with an atomizing nozzle; a granulation disc and a granulation disc motor are arranged on the lower side of the granulation tower; by adopting the design that the distributor injects high-pressure air flow for feeding and high-pressure water forms spray, the high-pressure air flow drives material powder to enter an annular cavity of the distributor for stable rotational flow to be fully blown away, and then the material powder is fully combined in an atomizing area formed by the atomizing nozzle through the high-pressure water, so that enough uniform and stable particles are formed; and then the particles fall onto the granulation disc and are integrated into better solid particles by being matched with hot air of the hot air injection port, so that the granulation effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic powder granulation, in particular to a dry granulation device. Background Art

[0002] There are two common ceramic tile production processes: wet powder making and dry powder making. Since the dry powder making process is more energy-saving and environmentally friendly than the traditional wet powder making process, it is increasingly used. However, the current dry powder making process is mainly achieved through disc granulators, stirring granulators and other devices, and the granulation effect (including particle size, hardness, etc.) is not stable enough, which not only affects the particle strength, but also leads to the molding effect of subsequent ceramic workpieces and products. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a dry granulation device.

[0004] The utility model solves the technical problem by adopting the following technical solution: providing a dry granulation device, including a granulation tower, wherein the upper side of the granulation tower is the granulation tower inlet, and the lower side of the granulation tower is the granulation tower outlet; a distributor is arranged on the upper side of the granulation tower, and the distributor comprises an outer cylindrical part and an inner cylindrical part, and an annular cavity is formed between the outer cylindrical part and the inner cylindrical part; a high-pressure air intake pipe and a feed fan are connected to the outer side of the outer cylindrical part, and a feeder is arranged on the high-pressure air intake pipe, and the high-pressure air intake pipe inputs high pressure into the annular cavity The air forms an annular airflow; a high-pressure water injection pipe is arranged on the upper side of the inner cylindrical part, and the lower side of the high-pressure water injection pipe passes through the inner cylindrical part, and an atomizing nozzle is arranged on the lower side of the high-pressure water injection pipe as the output side, and the atomizing nozzle sprays water mist in the granulation tower to form an atomization zone, and the atomization zone is on the lower side of the annular cavity; a granulation disk and a granulation disk motor are arranged on the lower side of the granulation tower, and a hot air injection port and a granulation tower discharge port are arranged on the side wall of the lower side of the granulation tower, and the hot air injection port and the granulation tower discharge port are located on the upper side of the granulation disk.

[0005] According to the dry granulation device provided by the utility model, by adopting the design of injecting high-pressure airflow into the distributor to feed the material and forming the spray with high-pressure water, at least the following technical effects are achieved: the high-pressure airflow drives the powder to enter the annular cavity of the distributor and is fully blown away in the stable vortex, and then is fully combined in the atomization area formed by the atomization nozzle through the high-pressure water to form sufficiently uniform and stable particles, and then falls onto the granulation disk and is integrated into better solid particles with the hot air from the hot air injection port, which greatly improves the granulation effect and ensures that the prepared particles are of stable quality and have higher strength.

[0006] As some preferred embodiments of the utility model, an atomization zone airflow injection pipe is arranged on the side wall of the granulation tower corresponding to the position of the atomization zone, and the atomization zone airflow injection pipe is connected to the atomization zone air intake fan, and the atomization zone airflow injection pipe inputs high-pressure air into the atomization zone to form a vortex in the atomization zone.

[0007] As some preferred embodiments of the present utility model, a guide plate is provided on the inner wall of the granulation tower.

[0008] As some preferred embodiments of the present utility model, the side wall of the granulation tower is provided with a turning surface, and the turning surface is provided with a dust collecting port.

[0009] As some preferred embodiments of the utility model, a pressurizing port and a pressurizing fan are provided at the lower side of the granulation tower, and the pressurizing port is located at the lower side of the granulation disk.

[0010] As some preferred embodiments of the utility model, the discharge port of the granulation tower is connected to a fluidized bed, the lower side of the fluidized bed is connected to a fluidized bed hot air pipe and a hot air furnace, the upper side of the fluidized bed is provided with a dust return pipe, and the dust return pipe is connected to the granulation tower.

[0011] As some preferred embodiments of the utility model, the fluidized bed is provided with a plurality of fluidized bed heating zones in sequence from front to back, each of the fluidized bed heating zones has the fluidized bed hot air duct connected to the hot air furnace, and a fluidized bed exhaust pipe is provided on the upper side of each of the fluidized bed heating zones and connected to the dust return pipe.

[0012] As some preferred embodiments of the utility model, the dust return pipe includes a dust return pipe outer layer pipe and a dust return pipe inner layer pipe, and an insulation layer is formed between the dust return pipe outer layer pipe and the dust return pipe inner layer pipe.

[0013] As some preferred embodiments of the utility model, an air distribution plate is provided in the fluidized bed, the air distribution plate has air distribution holes, the air distribution plate includes a first layer of air distribution plates and a second layer of air distribution plates from top to bottom, the aperture diameter and hole spacing of the air distribution holes on the first layer of air distribution plates are larger than the aperture diameter and hole spacing of the air distribution holes on the second layer of air distribution plates.

[0014] As some preferred embodiments of the present invention, the fluidized bed is equipped with a fluidized bed screen.

[0015] The beneficial effects of the utility model are:

[0016] 1. The dry granulation device of the utility model adopts a dry granulation process to prepare ceramic particles. Compared with the traditional wet powder making technology, it can reduce the equipment land area, reduce labor costs, save energy, and meet the requirements of energy conservation and emission reduction;

[0017] 2. The annular cavity of the distributor is on the upper side of the atomization area formed by the atomizing nozzle, so that the high-pressure airflow drives the powder into the annular cavity of the distributor and is fully dispersed in the stable swirl, and then fully combined in the atomization area formed by the atomizing nozzle through high-pressure water, so that the formed particles are more uniform and stable;

[0018] 3. The rotation of the granulating disc and the hot air from the hot air injection port can integrate the particles on the granulating disc into more optimized solid particles, which can improve the strength of the particles;

[0019] 4. The air distribution plate of the fluidized bed guides the hot air to form a strong airflow to disperse the particles, ensuring that the particles are dried more fully.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a three-dimensional diagram of the dry granulation device of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of the granulation tower in the utility model;

[0024] Figure 3 It is a structural sectional view of a granulation tower in the utility model;

[0025] Figure 4 It is a structural sectional view of the distributor in the utility model;

[0026] Figure 5 It is a three-dimensional diagram of the fluidized bed in the utility model;

[0027] Figure 6 It is a structural cross-sectional view of the fluidized bed in the utility model;

[0028] Figure 7 It is a partial cross-sectional view of the fluidized bed in the utility model.

[0029] Reference numerals:

[0030] Granulation tower 100, granulation disk 110, granulation disk motor 111, granulation tower discharge port 120, hot air injection port 130, atomization zone air flow injection pipe 140, atomization zone air intake fan 141, guide plate 150, turning surface 160, dust collection port 161, pressurization port 170, pressurization fan 171; distributor 200, outer cylindrical part 210, inner cylindrical part 220, high-pressure air intake pipe 230, feed fan 231, feeder 232, high-pressure water injection pipe 240, atomizing nozzle 241; fluidized bed 300, fluidized bed heating zone 310, air distribution plate 320, first layer of air distribution plate 321, second layer of air distribution plate 322, fluidized bed screen 330, mechanical vibration device 340; hot air furnace 400, fluidized bed hot air pipe 410; dust return pipe 500, fluidized bed exhaust pipe 510, dust return pipe outer layer pipe 520, dust return pipe inner layer pipe 530, insulation layer 540. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present utility model, the meaning of "a plurality" is more than two, and "greater than", "less than", "exceed" etc. are understood to exclude the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model, referring to Figure 1 One embodiment of the utility model provides a dry granulation device for preparing ceramic particles through a dry powder making process.

[0036] Further, see Figure 2 , Figure 3 The dry granulation device of the utility model comprises a granulation tower 100, the upper side of the granulation tower 100 is a granulation tower inlet, and the lower side of the granulation tower 100 is a granulation tower outlet. The granulation tower 100 has a cavity for granulation.

[0037] Further, refer to Figure 4 A distributor 200 is provided on the upper side of the granulation tower 100, and the distributor 200 includes an outer cylindrical portion 210 and an inner cylindrical portion 220, and an annular cavity is formed between the outer cylindrical portion 210 and the inner cylindrical portion 220. The outer cylindrical portion 210 and the inner cylindrical portion 220 of the distributor 200 are relatively fixed, so the annular cavity does not need to be movable.

[0038] Furthermore, the outer side of the outer cylindrical portion 210 is connected to a high-pressure air intake pipe 230 and a feed fan 231, and a feeder 232 is provided on the high-pressure air intake pipe 230. The high-pressure air intake pipe 230 inputs high-pressure air into the annular cavity to form an annular airflow, and the feeder 232 is responsible for feeding the raw materials into the high-pressure air intake pipe 230. The raw materials enter the annular cavity along the high-pressure air intake pipe 230 and are blown away by the annular airflow in the annular cavity.

[0039] Furthermore, a high-pressure water injection pipe 240 is provided on the upper side of the inner cylindrical portion 220, and the lower side of the high-pressure water injection pipe 240 passes through the inner cylindrical portion 220. An atomizing nozzle 241 is provided on the lower side of the high-pressure water injection pipe 240 as the output side, and the atomizing nozzle 241 sprays water mist in the granulation tower 100 to form an atomizing zone, that is, after the high-pressure water injection pipe 240 is connected to the high-pressure water, water mist is sprayed out through the atomizing nozzle 241. The atomizing zone is at the lower side of the annular cavity.

[0040] Further, refer to Figure 3 A granulation disk 110 and a granulation disk motor 111 are provided at the lower side of the granulation tower 100. The granulation disk motor 111 is used to drive the granulation disk 110 to rotate. Figure 2 , Figure 3 The side wall of the lower side of the granulation tower 100 is provided with a hot air injection port 130 and a granulation tower discharge port 120. The hot air injection port 130 is used to inject hot air into the granulation tower 100. The granulation tower discharge port 120 is used to discharge the granules prepared in the granulation tower 100. The hot air injection port 130 and the granulation tower discharge port 120 are located on the upper side of the granulation disk 110.

[0041] In actual operation, after the feed fan 231 is turned on, a high-pressure airflow is formed to drive the raw material (powder) into the distributor 200. The powder is fully blown away in the stable vortex in the annular cavity in the distributor 200, and then falls under the action of gravity. At the same time, high-pressure water is sprayed in the granulation tower 100 through the atomizing nozzle 241. At the same time, the suspension fan 13 provides an airflow to blow the powder upward, so that the powder is fully combined in the atomization area in the granulation tower 100 to form sufficiently uniform and stable particles.

[0042] The particles fall onto the rotating granulation disk 110 under the action of gravity. The granulation disk 110 cooperates with the hot air from the hot air injection port 130 to continuously integrate the particles on the granulation disk 110 into better solid particles. As the solid particles gradually increase in size and weight, the solid particles are discharged from the granulation tower discharge port 120 under the influence of the centrifugal force of the rotation of the granulation disk 110, completing the granulation work.

[0043] Some embodiments, see Figure 2 The side wall of the granulation tower 100 is provided with an atomization zone airflow injection pipe 140 corresponding to the atomization zone, and the atomization zone airflow injection pipe 140 is connected to an atomization zone air intake fan 141, and the atomization zone airflow injection pipe 140 inputs high-pressure air into the atomization zone to form a swirl in the atomization zone. The swirl in the atomization zone enables the particles to collide and combine more fully with the water mist in the atomization zone, and the more stable swirl can ensure that the formed particles are more uniform.

[0044] In this embodiment, optionally, refer to Figure 3 A guide plate 150 is provided on the inner wall of the granulation tower 100 to guide the airflow entering the granulation tower 100 from the airflow injection pipe 140 in the atomization zone to form a reliable swirl.

[0045] Some embodiments, see Figure 2 , Figure 3 The side wall of the granulation tower 100 is provided with a turning surface 160, and a dust collecting port 161 is provided on the turning surface 160. The turning surface 160 is designed to ensure that the particles fall under the action of gravity and do not reach the turning surface 160, and only tiny dust that is not combined with water mist will be sucked away by the dust collecting port 161, thereby achieving the dust removal effect of the granulation tower 100.

[0046] In some embodiments, a pressurizing port 170 and a pressurizing fan 171 are provided at the lower side of the granulation tower 100, and the pressurizing port 170 is located at the lower side of the granulation disk 110. The pressurizing fan 171 is used to inject pressurized air into the pressurizing port 170, so that a positive pressure is formed at the lower side of the granulation disk 110 relative to the upper side of the granulation disk 110, so as to prevent the particles from falling from the gap between the granulation disk 110 and the inner wall of the granulation tower 100, causing blockage or waste.

[0047] Some embodiments, see Figure 1The granulation tower discharge port 120 is connected to a fluidized bed 300 for heating and drying the solid particles entering the fluidized bed 300. Figure 5 The lower side of the fluidized bed 300 is connected with a fluidized bed hot air pipe 410 and a hot air furnace 400. The hot air generated by the hot air furnace 400 is injected into the lower side of the fluidized bed 300 through the fluidized bed hot air pipe 410. A dust return pipe 500 is arranged on the upper side of the fluidized bed 300. The dust return pipe 500 is connected to the granulation tower 100. The waste gas and dust generated by heating and drying in the fluidized bed 300 are returned to the granulation tower 100 through the dust return pipe 500 to form a cycle.

[0048] In some embodiments, the fluidized bed 300 generates a mechanical vibration effect through the mechanical vibration device 340, so that the fluidized bed 300 has an effect similar to that of a vibrating screen, thereby ensuring that the particles are fully heated.

[0049] Some embodiments, see Figure 5 , Figure 6 The fluidized bed 300 is provided with a plurality of fluidized bed heating zones 310 from front to back, each fluidized bed heating zone 310 has a fluidized bed hot air duct 410 connected to the hot air furnace 400, and each fluidized bed heating zone 310 is provided with a fluidized bed exhaust pipe 510 connected to the dust return pipe 500 on the upper side, thereby ensuring that the solid particles in the fluidized bed heating zones 310 at various locations in the fluidized bed 300 can be fully and evenly heated.

[0050] Some embodiments, see Figure 7 The dust return pipe 500 includes an outer dust return pipe 520 and an inner dust return pipe 530. An insulation layer 540 is formed between the outer dust return pipe 520 and the inner dust return pipe 530 to prevent the exhaust gas entering the dust return pipe 500 from forming condensed water and affecting the drying work of the fluidized bed 300 on the solid particles.

[0051] Some embodiments, see Figure 6 , Figure 7 The fluidized bed 300 is provided with an air distribution plate 320, which has air distribution holes for guiding the hot air from the fluidized bed hot air pipe 410 into the fluidized bed 300. The air distribution plate 320 includes a first layer of air distribution plates 321 and a second layer of air distribution plates 322 from top to bottom. The aperture and hole spacing of the air distribution holes on the first layer of air distribution plates 321 are larger than the aperture and hole spacing of the air distribution holes on the second layer of air distribution plates 322. The second layer of air distribution plates 322 on the lower layer is used to evenly distribute the hot air in the space between the first layer of air distribution plates 321 and the second layer of air distribution plates 322, and then the first layer of air distribution plates 321 on the upper layer forms a strong airflow to disperse the solid particles, thereby ensuring that the solid particles are fully dried.

[0052] Some embodiments, see Figure 6The fluidized bed 300 is built with a fluidized bed screen 330. The solid granular material is on the fluidized bed screen 330. With the high-pressure hot air passing through the fluidized bed screen 330, the solid granular material can be dried more efficiently.

[0053] In the description of this specification, the description with reference to the terms "some embodiments" or "it is conceivable that" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dry granulation device, comprising a granulation tower (100), wherein the upper side of the granulation tower (100) is a granulation tower inlet, and the lower side of the granulation tower (100) is a granulation tower outlet, characterized in that: A distributor (200) is arranged on the upper side of the granulation tower (100), and the distributor (200) comprises an outer cylindrical portion (210) and an inner cylindrical portion (220), and an annular cavity is formed between the outer cylindrical portion (210) and the inner cylindrical portion (220); The outer side of the outer cylindrical portion (210) is connected to a high-pressure air intake pipe (230) and a feed fan (231); a feeder (232) is provided on the high-pressure air intake pipe (230); the high-pressure air intake pipe (230) inputs high-pressure air into the annular cavity to form an annular airflow; A high-pressure water injection pipe (240) is arranged on the upper side of the inner cylindrical portion (220), and the lower side of the high-pressure water injection pipe (240) passes through the inner cylindrical portion (220). An atomizing nozzle (241) is arranged on the lower side of the high-pressure water injection pipe (240) as an output side. The atomizing nozzle (241) sprays water mist in the granulation tower (100) to form an atomizing zone, and the atomizing zone is located at the lower side of the annular cavity; A granulation disk (110) and a granulation disk motor (111) are arranged at the lower side of the granulation tower (100), and a hot air injection port (130) and a granulation tower discharge port (120) are arranged on the side wall at the lower side of the granulation tower (100), and the hot air injection port (130) and the granulation tower discharge port (120) are located at the upper side of the granulation disk (110).

2. A dry granulation device according to claim 1, characterized in that: An atomization zone airflow injection pipe (140) is arranged on the side wall of the granulation tower (100) at a position corresponding to the atomization zone. The atomization zone airflow injection pipe (140) is connected to an atomization zone air intake fan (141). The atomization zone airflow injection pipe (140) inputs high-pressure air into the atomization zone to form a swirl flow in the atomization zone.

3. A dry granulation device according to claim 1, characterized in that: The inner wall of the granulation tower (100) is provided with a guide plate (150).

4. A dry granulation device according to claim 1, characterized in that: The side wall of the granulation tower (100) is provided with a turning surface (160), and the turning surface (160) is provided with a dust collecting port (161).

5. A dry granulation device according to claim 1, characterized in that: A pressurizing port (170) and a pressurizing fan (171) are provided at the lower side of the granulation tower (100), and the pressurizing port (170) is located at the lower side of the granulation disk (110).

6. A dry granulation device according to claim 1, characterized in that: The granulation tower discharge port (120) is connected to a fluidized bed (300), the lower side of the fluidized bed (300) is connected to a fluidized bed hot air pipe (410) and a hot air furnace (400), and the upper side of the fluidized bed (300) is provided with a dust return pipe (500), and the dust return pipe (500) is connected to the granulation tower (100).

7. A dry granulation device according to claim 6, characterized in that: The fluidized bed (300) is provided with a plurality of fluidized bed heating zones (310) in sequence from front to back, each of the fluidized bed heating zones (310) has a fluidized bed hot air pipe (410) connected to the hot air furnace (400), and each of the fluidized bed heating zones (310) is provided with a fluidized bed exhaust pipe (510) on the upper side thereof connected to the dust return pipe (500).

8. A dry granulation device according to claim 6, characterized in that: The dust return pipe (500) comprises a dust return pipe outer layer pipe (520) and a dust return pipe inner layer pipe (530), and a heat preservation layer (540) is formed between the dust return pipe outer layer pipe (520) and the dust return pipe inner layer pipe (530).

9. A dry granulation device according to claim 6, characterized in that: An air distribution plate (320) is arranged in the fluidized bed (300), and the air distribution plate (320) has air distribution holes. The air distribution plate (320) comprises a first layer of air distribution plates (321) and a second layer of air distribution plates (322) from top to bottom, and the aperture and hole spacing of the air distribution holes on the first layer of air distribution plates (321) are larger than the aperture and hole spacing of the air distribution holes on the second layer of air distribution plates (322).

10. A dry granulation device according to claim 6, characterized in that: The fluidized bed (300) is internally provided with a fluidized bed screen (330).

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