JPH0652929U - Processing liquid supply device for particle processing equipment - Google Patents

Abstract

(57) [Summary] [Objective] The spray direction of droplets can be freely changed, and a wide spray zone formation area is ensured to prevent early contact between droplets and granular material. [Structure] Through hole (16) in swing member (15) having a spherical shape
And a diametrically expanded portion (17) diverging toward the end is provided at one end of the through hole (16). An annular gap is provided between the through hole (16) and the inner diameter surface of the swing member (15), and the injection port (21) is retracted from the opening (17a) of the expanded diameter portion (17). The spray nozzle (20). A secondary gas flow path (36) is formed between the swing member (15) and the spray nozzle (20). One end of the secondary gas flow path (36) is connected to the secondary air supply source, and the other end of the secondary gas flow path (36) communicates with the expanded diameter section (17). The swinging member (15) is supported by a guide member (41) having an inner diameter surface formed into a continuous concave spherical surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a particle processing apparatus widely used in the pharmaceutical industry, the food industry, and other industries that require particle processing (granulation, coating, etc.). , Coating liquid, etc.).

[0002]

[Prior art]

 A fluidized bed apparatus has been widely used as an apparatus for granulating and coating powder particles. In this fluidized bed apparatus, a breathable member such as a perforated plate or a wire net is arranged at the lower part of the processing container, and a filter cloth for preventing scattering of powdery particles is arranged at the upper part. By ejecting an air flow from the lower part of this processing container or rotating a rotating body / stirring blade, the powder and granules in the processing container are levitated and suspended in a suspended state to form a fluidized bed, which is then bonded. A desired particle is processed by spraying a liquid or a coating liquid and further supplying a powder if necessary.

In a fluidized bed apparatus of this type, a spray nozzle for spraying a binding liquid or the like is fixed by a top spray method in which droplets are sprayed downward from the top, and a droplet is sprayed upward from the bottom. There is a bottom spray method that is fixed so that it is fixed, and a side spray method that is fixed so that droplets are sprayed from the lower side surface of the processing container toward the center.

[0004]

[Problems to be solved by the device]

 Among the fixing methods described above, in the top spray method and the bottom spray method, since there is a distance between the spray nozzle and the granules, some of the sprayed droplets are dried before coming into contact with the granules. As a result, there is a problem that a loss occurs, or the viscosity of the droplet changes, and sufficient granulation or a coating effect cannot be expected. On the other hand, the side spray method is an excellent fixing method in that the above-mentioned problems such as drying of droplets are less likely to occur because the spray is performed from the lower side surface of the granular material, which has a high density. Since the droplets come into contact with the granular material in the vicinity of the nozzle tip in a state where they are not sufficiently dispersed and atomized, there are many cases in which the droplets locally adhere to form coarse particles.

This problem can be solved by using the spray nozzle disclosed in Japanese Patent Application Laid-Open Nos. 2-90957 and 4-145937. That is, a secondary air flow passage is provided around the spray nozzle, and an air flow is ejected from the secondary air flow passage to form a spray zone near the tip of the nozzle in which the density of powder particles is low. This spray zone prevents contact between the particles and the droplets in the vicinity of the tip of the nozzle, so that the droplets that have been sufficiently dispersed and atomized can be brought into contact with the particles.

However, in the spray nozzle of Japanese Patent Application Laid-Open No. 2-90957, the tip of the nozzle is located inward of the processing container rather than the support that supports the nozzle. Therefore, the distance from the tip of the nozzle to the contact area between the powder and granules and the liquid droplet is relatively short, and the liquid droplet may come into contact with the powder or granular material before being sufficiently dispersed and atomized. In addition, since the tip of the secondary air flow path is narrowed down according to the shape of the nozzle tip, the spray zone formation area becomes narrower, which may reduce the contact blocking function of the spray zone. .

On the other hand, the spray nozzle disclosed in Japanese Patent Laid-Open No. 4-145937 has a drawback that the area where the spray zone is formed is narrow as in the case of the above. Also, the optimum spray position of the liquid droplets varies depending on the amount of powder particles charged, the particle size, the specific gravity, etc. Since the mounting position must be changed, complicated replacement work is required.

Therefore, the present invention provides a treatment liquid supply device of a particle processing device capable of arbitrarily selecting the spraying direction of droplets, ensuring a wide spray zone forming region, and sufficiently dispersing and atomizing the droplets. For the purpose of providing.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the device of the present invention is a processing liquid supply device of a particle processing device that performs processing such as granulation and coating on powder particles contained in the processing container, and is an internal space of the processing container. A spherical swing member having a through hole communicating with the through hole, and a diverging diameter expanding portion formed at the end of the through hole on the processing container side; and the swing member fixed to the processing container with an inner diameter surface. A guide member for slidingly guiding the outer surface of the injection member, and a treatment liquid such as a binder liquid or a coating liquid, which is accommodated in the through hole of the swing member by retracting the injection port from the opening of the expanded diameter portion. Is provided between the spray nozzle and the spray nozzle and the inner diameter surface of the oscillating member, one end of which is connected to the gas supply source and the other end of which is connected to the enlarged diameter part. And a secondary gas flow path.

Further, a powder supply port is provided in the secondary gas flow path.

Further, the swing member and the spray nozzle are configured to be disassembled.

[0012]

[Action]

 The secondary gas flow introduced from the secondary gas passage into the expanded diameter portion is guided by the expanded diameter portion to form a spray zone in a wide space in front of the spray nozzle injection port. This spray zone prevents a wider range of early contact between the droplet and the granular material near the nozzle tip. Further, since the injection port of the spray nozzle is set back from the opening of the expanded diameter portion, the distance from the injection port to the contact area between the powder and granules and the droplet becomes large. Further, the rocking member has a spherical shape, and the outer surface thereof is slidably guided by the inner diameter surface of the guide member. Therefore, the swinging member can be swung in any direction up, down, left or right.

Further, by providing the powder supply port in the secondary gas flow passage, the powder flowing into the secondary gas flow passage is directed from the expanded diameter portion toward the internal space of the processing container together with the secondary air flow. Blown out.

[0014]

【Example】

 An embodiment in which the present invention is applied to a rolling fluidized bed granulating apparatus which is one of particle processing apparatuses will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a vertical cross-sectional view showing the entire structure of a rolling fluidized bed granulator. The schematic structure of this device will be described below.

A bottom plate (2) having an opening (2a) in the center is fixed to the bottom of the cylindrical processing container (1), and a frustoconical ventilation is provided in the opening (2a) of the bottom plate (2). The member (3) is fitted. This ventilation member (3) is made of a perforated plate, a wire mesh or other suitable air-permeable material. A hollow column (4) is erected in the center of the ventilation member (3), and a pivot (6) connected to a drive source (not shown) is rotatably housed in the column (4). Has been. The rotating body (7) is mounted on the top of the pivot (6) by fastening means such as a nut. This rotating body (7) is in the shape of a truncated cone with a sloping wall that widens toward the end, and a plurality of radially extending stirring blades (9) are provided at the bottom of the sloping wall at the tip of the processing container (1). ) Is installed close to the side wall (1a) and is slightly separated from the bottom plate of the processing container. Below the ventilation member (3), an air flow path (10) connected to an air supply source (not shown) is provided.

The air supplied from the air supply source passes through the air passage (10), the ventilation member (3), and flows into the internal space of the rotating body (7). Then, it spouts into the internal space of the processing container (1) from the gap between the bottom end of the rotator (7) and the bottom plate (2) of the processing container (1). Due to the cooperation of this air flow and the rotating operation of the rotating body (7), the particles contained in the internal space of the processing container (1) are swirled up while floating and flowing to form a rolling fluidized bed. The jetted air flow is discharged from an exhaust port (11) provided in the upper part of the processing container (1). At this time, the granular material mixed in the air flow is collected by the filter cloth (12).

The treatment liquid supply device (13) according to the present invention is provided on the side wall (1a) of the treatment container (1). By supplying the processing liquid (binding liquid, coating liquid, etc.) from the processing liquid supply device (13) into the tumbling fluidized bed, the target powder or granular material is processed, that is, granulated or coated. It will be possible. The structure of the treatment liquid supply device (13) will be described below with reference to FIG.

The swing member (15) having a spherical shape is formed with a through hole (16) whose one end is expanded in diameter toward the end (hereinafter, this expanded end portion is referred to as an expanded diameter part (17)). . Inside the through hole (16), a spray nozzle (20) in which a tubular outer member (18) and a tubular outer member (19) are concentrically arranged is provided with the inner diameter surface of the rocking member (15). An annular gap is provided therebetween, and the injection port (21) is retracted from the opening (17a) of the expanded diameter portion (17) and stored. The outer member (18) is composed of an outer cylinder (22) fitted and fixed by a disassembleable hook and an outer nozzle cap (23). Further, the inner member (19) is also composed of an inner cylinder (25) and an inner nozzle insert (26) fitted and fixed by a disassembleable hook eye, like the outer member (18). The inner nozzle insert (26) is integrally formed with an annular protrusion (27) that comes into contact with the inner diameter surface of the outer nozzle cap (23), and the outer peripheral surface of this annular protrusion (27) is shown in FIG. Thus, a plurality of spiral grooves (28) are formed.

A base end portion of the outer cylinder (22) is fitted and fixed to a primary air inlet (31) provided on one end surface of the nozzle support member (30) by a disassembleable hook eye. Further, the base end portion of the inner cylinder (25) is fitted and fixed to the processing liquid supply port (32) provided at the position facing the primary air inlet port (31) by the above-mentioned clasp eye. The primary air inlet (31) and the processing liquid supply port (32) are connected to an air supply source and a processing liquid supply source (neither shown).

A tubular intermediate member (34) is mounted between the swinging member (15) and the nozzle supporting member (30) by fastening means (not shown) such as a screw. Inside the intermediate member (34), the base end portion of the spray nozzle (20) is housed with an annular gap provided between the intermediate member (34) and the inner diameter surface of the intermediate member (34). Further, the intermediate member (34) is provided with a secondary gas supply port (35) communicating with the annular gap. When compressed gas, such as compressed air (secondary air), is supplied from this secondary gas supply port (35), the secondary air is generated in the annular gap of the inner diameter surface of the intermediate member (34) and the inner diameter of the rocking member (15). It sequentially passes through the annular gap in the surface and jets into the expanded diameter portion (17). In the following description, the flow path of the secondary air, that is, the annular gap formed on the inner diameter surfaces of the intermediate member (34) and the swing member (15) will be referred to as the secondary gas flow path (36). .

The swing member (15) has its tip end fitted into the opening (38) provided in the side wall (1a) of the processing container (1), and then fixed to the side wall (1a). The inner guide member (39) and the outer guide member (40) attached to the inner guide member (39) by fastening means such as screws are supported by the guide member (41). The separation surface of the inner and outer guide members (39) (40) is provided at a position passing through the maximum outer diameter portion of the swinging member (15). The inner diameter surfaces of the inner and outer guide members (39) (40) are formed as continuous concave spherical surfaces capable of making surface contact with the outer surface of the swing member (15). With this configuration, the outer surface of the swing member (15) is guided by the inner diameter surfaces of the guide members (39) (40), so that the swing member (15), the intermediate member (34), and the nozzle support member (30). ) Becomes a swinging movement integrally in the vertical and horizontal directions.

The device of the present invention has the above configuration. The operation and effect of the device of the present invention will be described below.

The processing liquid supplied from the processing liquid supply source flows into the inner cylinder (25) from the processing liquid supply port (32) and is ejected from the tip of the inner nozzle insert (26). On the other hand, the primary air supplied from the air supply source flows into the gap between the outer cylinder (22) and the inner cylinder (25) from the primary air inlet (31), and the spiral groove (28) of the annular protrusion (27). ) And becomes a swirl flow, which acts on the droplets ejected from the inner nozzle insert (26) to atomize them. Here, when the secondary air flow is ejected from the secondary gas flow path (36) into the expanded diameter portion (17), the space (S) having a low density of the granular material (43) in front of the injection port (21) (S ) (Hereinafter referred to as a spray zone) is formed.

By forming such a spray zone (S), contact between the liquid droplets (44) and the granular material (43) in the vicinity of the injection port (21) of the spray nozzle (20) is prevented. In other words, the contact area between the droplet (44) and the granular material (43) moves from the vicinity of the injection port (21) toward the inside of the processing container (1). As a result, the droplets (44) that have been sufficiently dispersed and atomized can be brought into contact with the granular material (43).

According to the present invention, the following unique effects can be exhibited.

Since the secondary air flow is introduced into the radially expanded portion (17) that spreads toward the end, the area where the spray zone (S) is formed is smaller than that of the conventional products (JP-A-2-90957 and JP-A-4-145937). Widely secured. As a result, early contact between the droplet (44) and the granular material (43) is prevented in a wider range, and it becomes possible to more reliably prevent the generation of coarse particles.

Since the injection port (21) of the spray nozzle (20) is provided at a position retracted from the opening (17a) of the expanded diameter part (17), the distance from the injection port (21) to the contact area can be reduced. It can be secured large. Therefore, it becomes possible to sufficiently disperse and atomize the droplets.

Since the treatment liquid can be sprayed in any direction of up, down, left and right, it is possible to freely select a spray position suitable for the charging amount, particle diameter, specific gravity and the like of the powdery particles (43).

By loosening the screw and removing the outer guide member (40) from the inner guide member (39), the swing member (15), the nozzle support member (30), the intermediate member (34), and the spray nozzle (20). The main part of the device can be easily removed from the processing container (1). Moreover, this main part can be easily disassembled into the respective elements (the swinging member (15), the nozzle supporting member (30), the intermediate member (34), and the spray nozzle (20)). 20) can also be disassembled into an inner cylinder (25), an inner nozzle insert (26), an outer cylinder (22) and an outer nozzle cap (23). In this way, since each component can be completely disassembled, maintenance work such as cleaning can be performed easily and surely.

Since the oscillating member (15) protruding from the side wall (1a) of the processing container (1) is spherical, the powder or granules dropped on the oscillating member (15) will not be affected by the oscillating member (15). Stays on the outer surface of 15) ・ Slides off smoothly without adhering. Therefore, it is possible to improve the recovery rate and quality of the product after the processing is completed.

FIG. 4 shows another embodiment of the device of the present invention. This is the one in which the powder supply hopper (45) is newly installed in the intermediate member (34) and the powder supply port (46) is provided in the secondary gas flow path (36), especially on the surface of the granular material. This is an apparatus suitable for performing layered modified granulation on. When the powder is supplied to the powder supply hopper (45), the powder flows into the secondary gas flow path (36) from the powder supply port (46) and enters the inner space of the processing container (1) together with the secondary air flow. Blown out. The secondary gas supply port (35) is not shown in the figure.

[0033]

[Effect of device]

 As described above, according to the device of the present invention, since the secondary air flow is introduced into the radially expanded portion that is widened toward the end, a wide spray zone forming area is secured. As a result, early contact between the droplet and the granular material is blocked in a wider range, and it becomes possible to more reliably prevent the generation of coarse particles.

Further, since the injection port of the spray nozzle is set back from the opening of the expanded diameter portion, it is possible to secure a large distance from the injection port to the region where the powdery particles and the droplets come into contact with each other. Therefore, it becomes possible to sufficiently disperse and atomize the droplets.

Furthermore, since the treatment liquid can be sprayed in any direction, including the tangential direction, up, down, left, and right, it becomes possible to freely select a spray position that suits the charged amount of powdered particles, particle size, specific gravity, and the like.

Further, by providing the powder supply port in the secondary gas flow path, the powder supplied to the powder supply port passes through the secondary gas flow path and extends from the diverging portion of the end to a wide range within the processing container. It is blown out to the wall. Therefore, it becomes possible to more efficiently perform the modified granulation on the granular material.

Furthermore, by making the swinging member and the spray nozzle completely disassembled, maintenance work such as cleaning can be performed easily and surely.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a tumbling fluidized bed granulator having a treatment liquid supply device according to the present invention.

FIG. 2 is a cross-sectional view of the processing liquid supply apparatus taken along the line AA in FIG.

FIG. 3 is an enlarged plan view (a) near the inner nozzle insert and a cross-sectional view (b) taken along line BB.

FIG. 4 is a vertical sectional view showing another embodiment of the processing liquid supply apparatus according to the present invention.

[Explanation of symbols]

 1 Processing Container 15 Swing Member 16 Through Hole 17 Expanded Portion 21 Opening 20 Spray Nozzle 21 Injection Port 36 Secondary Gas Flow Path 41 Guide Member

Claims (3)

[Scope of utility model registration request] 1. Granulation into a granular material contained in a processing container,
A processing liquid supply device of a particle processing device for performing processing such as coating, which has a through hole communicating with the internal space of the processing container, and has a diverging expanded portion at the end of the through hole on the processing container side. The formed spherical rocking member, a guide member that is fixed to the processing container and slides and guides the outer surface of the rocking member by the inner diameter surface, and the injection port is expanded in the through hole of the rocking member. A spray nozzle that is retracted from the opening of the diameter portion and is sprayed with a treatment liquid such as a binder liquid and a coating liquid from the injection port, and is provided between the spray nozzle and the inner diameter surface of the swing member, and has one end portion. Is connected to a gas supply source, and the other end portion is composed of a secondary gas flow path communicating with the expanded diameter portion. 2. The treatment liquid supply apparatus for a particle processing apparatus according to claim 1, wherein a powder supply port is provided in the secondary gas flow path. 3. The treatment liquid supply apparatus for a particle processing apparatus according to claim 1, wherein the swing member and the spray nozzle are configured to be disassembled.