JP2023130200A - Particulate matter processing device cleaning system - Google Patents

Abstract

To provide a particulate matter processing device cleaning system which can automatically clean the inside and outside of a device including an auxiliary facility thoroughly and efficiently.SOLUTION: A cleaning system 1 performs automatic cleaning processing of a device body of a pan coating device 2 and a liquid feed line 17 of coating liquid and an air supply and exhaust system members including an air supply duct 12 and the like. Spray nozzles 4 connected to the liquid feed line 17 and an in-pan cleaning nozzle 22 connected to a cleaning liquid supply line 30 are provided in a coating pan 3. Cleaning nozzles 21, 23-29 connected to the cleaning liquid supply line 30 are provided in a housing 5 or each air supply and exhaust system member. An ultra fine bubble generation device 31 is provided for the liquid feed line 17 and the cleaning liquid supply line 30. In cleaning processing, a cleaning liquid containing ultra fine bubbles with diameters less than 200 nm is supplied to the spray nozzles 4 and the respective cleaning nozzles 21-29.SELECTED DRAWING: Figure 1

Description

The present invention relates to cleaning technology for powder processing equipment such as pan coating equipment, stirring granulators, and fluidized bed granulation coating equipment, and in particular to cleaning technology for powder processing equipment that can automatically clean the inside and outside of the equipment, including ancillary equipment. Regarding cleaning systems.

In powder processing equipment, such as granulation coating equipment, used in the production of pharmaceuticals, foods, etc., after the granulation and coating processing of the powder, the equipment is cleaned to prevent contamination, etc. . Conventionally, in this cleaning process, cleaning liquid such as city water (tap water), hot water, chemical solution, purified water, etc. is sprayed from a cleaning nozzle placed inside the device, or cleaning water is stored inside the device. One method is to wash the water in a pool under such conditions. Furthermore, there are various forms of cleaning processing, such as fixed cleaning in which the device is cleaned without disassembling it, manual cleaning by an operator, and automatic cleaning using a nozzle installed in the device.

Japanese Patent Application Publication No. 2013-208537

However, conventional cleaning processing mainly focuses on cleaning the inside of the device, and cleaning of the equipment incidental to the device, such as the liquid tank and the liquid sending lines such as piping, is not necessarily sufficient. In addition, the cleaning action is limited to the effect of separating dirt by the impact force of the nozzle jet, or the effect of dissolving dirt with hot water or chemical solutions, and it takes a considerable amount of time to thoroughly clean the equipment, and the attached equipment There was a problem in that it was not possible to efficiently and automatically clean the inside and outside of the device, including the inside and outside of the device.

In this case, for example, the liquid tank can only be cleaned by installing a cleaning nozzle inside it, and the liquid supply line can only be cleaned with purified water, making it very difficult to clean it thoroughly. It's hard to say that there are. For this reason, conventional powder and granule processing equipment, especially those that handle pharmaceuticals and foods, use the same liquid delivery line for the same product or replace it with a new one for each processing batch. However, there were issues in terms of cost and production efficiency. Furthermore, since there is no concept of cleaning the drainage pipes, the cleaning process itself is not performed, which is not preferable from a GMP perspective.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning system for a powder processing apparatus that can automatically and efficiently clean the inside and outside of the apparatus including auxiliary equipment.

A powder and granular material processing apparatus cleaning system of the present invention includes a processing container that accommodates a powder and granular material, and a spray nozzle that sprays a predetermined processing liquid onto the powder and granular material in the processing container. A cleaning system that performs a cleaning process for an apparatus, comprising: a liquid feeding line that supplies the processing liquid to the spray nozzle; and a cleaning nozzle that is disposed within the processing container and injects a cleaning liquid that cleans the inside of the processing container. and a cleaning liquid supply line that supplies the cleaning liquid to the cleaning nozzle;
an ultra-fine bubble generator that is disposed in each path of the liquid feeding line and the cleaning liquid supply line and that forms bubbles with a diameter of less than 200 nm; and a cleaning liquid containing ultra-fine bubbles with a diameter of less than 200 nm is supplied to the cleaning nozzle.

In the present invention, an ultra-fine bubble generator is placed in the path of the liquid feeding line and the cleaning liquid supply line, and when cleaning the powder/granular material processing equipment, ultra-fine bubbles with a diameter of less than 200 nm are applied to the spray nozzle and cleaning nozzle. Supply cleaning solution containing fine bubbles. As a result, the combined effect of ultra-fine bubbles and nozzle spray automatically cleans the inside and outside of the device, including the auxiliary equipment. In this case, the ultra-fine bubble generator can be retrofitted to the existing liquid delivery line or cleaning liquid supply line, so it can automatically clean the powder processing equipment without changing the conventional system configuration or cleaning process. It becomes possible to do so.

In the powder processing equipment cleaning system, the liquid supply line includes a liquid tank in which the processing liquid is stored, a pump that feeds the processing liquid in the liquid tank to the nozzle, and a water supply line to the liquid tank. and a second pipe connecting the liquid tank and the pump, and the pump and the spray nozzle, respectively, and connecting the ultra fine bubble generator to the first pipe. It may be arranged inside.

Further, the powder and granular material processing apparatus includes a casing that houses the processing container, and an air supply/exhaust system member for supplying processing gas into the processing container and exhausting the processing gas from the processing container. The cleaning nozzle is disposed within the housing, the processing container, and the supply/exhaust system member, and when cleaning the powder/granular material processing apparatus, the cleaning nozzle is disposed within the housing, the processing container, and the supply/exhaust system member. A cleaning liquid containing the ultra-fine bubbles may be sprayed from the cleaning nozzle during the cleaning process. In this case, the granular material processing apparatus may be a pan coating apparatus including a coating pan, which is rotatably provided around a rotation axis and accommodates the granular material to be treated, as a processing container.

Furthermore, the powder processing apparatus may be an agitation granulation apparatus equipped with a substantially cylindrical vessel with a bottom as the processing container, and the cylindrical container is arranged vertically as the processing container. A fluidized bed apparatus may also be used.

On the other hand, the cleaning nozzle may be a low-speed rotating nozzle whose nozzle tip rotates when water flows through it, a three-dimensional nozzle that can spray the cleaning liquid in vertical and horizontal directions, or a shower ball with a spherical head. good.

In addition, as the cleaning liquid, any one of city water, hot water, chemical solution, and purified water containing ultra-fine bubbles with a diameter of less than 200 nm may be used.

According to the powder processing equipment cleaning system of the present invention, an ultra-fine bubble generator is disposed in the route of the liquid feeding line and the cleaning liquid supply line of the powder processing equipment, and when cleaning the powder processing equipment, A cleaning solution containing ultra-fine bubbles with a diameter of less than 200 nm is supplied to the spray nozzle and cleaning nozzle, so the combined effect of ultra-fine bubbles and nozzle jetting makes it possible to clean the inside and outside of the equipment, including incidental equipment. becomes. As a result, it becomes possible to automatically clean the inside and outside of the device, including the ancillary equipment, which could not be achieved with conventional microbubbles.

1 is a sectional view showing the configuration of a cleaning system according to a first embodiment of the present invention. 2 is a table showing the results of a cleaning test using microbubbles and ultrafine bubbles. It is an explanatory view showing the composition of the cleaning system which is Embodiment 2 of the present invention. It is an explanatory view showing the composition of the washing system which is Embodiment 3 of the present invention.

(Embodiment 1)
Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram showing the configuration of a powder processing apparatus cleaning system according to Embodiment 1 of the present invention. The cleaning system 1 in Fig. 1 cleans a pan coating device 2, which is one of the powder processing devices, and cleans not only the device itself, but also the coating liquid supply line, supply and exhaust ducts, etc. Exhaust system components can also be automatically cleaned.

The pan coating device 2 is a device that performs a coating process such as sugar coating on a powder or granular material to be processed, such as a tablet, accommodated in a coating pan (rotating drum: processing container) 3. A spray nozzle 4 for spraying a coating liquid is housed in the coating pan 3 (hereinafter abbreviated as pan 3), and the coating liquid (processing liquid) is sprayed from the spray nozzle 4 while rotating the pan 3. By doing so, the object to be processed in the pan 3 is coated.

As shown in FIG. 1, the bread coating device 2 has a structure in which a bread 3 is rotatably installed in a bread chamber 6 of a housing 5. The pan 3 rotates around a substantially horizontal axis of rotation O with its front side (right side in the figure) supported by a pan receiving roll 7, and a workpiece such as a tablet is thrown into the pan 3. . The center of the bread 3 is a body part 8 having a circular cross section, and the body part 8 is provided with a large number of ventilation holes 9 over the entire circumference. A front door 11 whose interior space is an air supply chamber 10 is provided on the front side of the housing 5. Hot air and cold air (processing gas) are supplied to the air supply chamber 10 from an external air supply duct (not shown) via an air supply duct 12 . The processing gas supplied to the air supply chamber 10 is introduced into the pan 3, used for drying the object to be processed, etc., and then discharged from the pan 3 through the ventilation hole 9.

The housing 5 is further provided with an exhaust duct 13 for leading the processing gas out of the apparatus. The exhaust duct 13 communicates with an exhaust chamber 14 located at the bottom of the bread chamber 6. The exhaust chamber 14 is in contact with the lower part of the pan 3 , and the processing gas supplied into the pan 3 flows into the exhaust chamber 14 through the vent hole 9 . The processing gas discharged outside the pan 3 is introduced into the exhaust duct 13 from the exhaust chamber 14. An external exhaust duct (not shown) is connected to the exhaust duct 13, and the process gas in the exhaust duct 13 is sent to the external exhaust duct and exhausted to the outside of the apparatus. Note that the housing 5 is also provided with a housing drying air duct 15 through which dry air for drying the inside of the housing is supplied.

A spray nozzle 4 for spraying a coating liquid is arranged inside the pan 3. The spray nozzle 4 is attached to the gun holder 16 and inserted into the pan 3 through the front opening 3a. Coating liquid and spray air are supplied to the spray nozzle 4 via a liquid supply hose (not shown) housed in the gun holder 16 . The liquid supply hose inside the gun holder 16 is connected to a liquid supply line 17 outside the apparatus, and the coating liquid is supplied to the spray nozzle 4 via this liquid supply line 17.

The liquid supply line 17 is provided with a liquid tank 18 for storing the coating liquid and a pump 19 for feeding the coating liquid from the liquid tank 18 to the spray nozzle 4 . Water is supplied to the liquid tank 18 from a water supply pipe (first pipe) 20a, where it is stirred and mixed with the coating agent to form a coating liquid. The coating liquid in the liquid tank 18 is supplied by the pump 19 from the connecting pipe (second pipe) 20b to the spray nozzle 4 via the hose in the gun holder 16, and is sprayed onto the powder or granular material to be treated in the pan 3. Ru.

On the other hand, in the cleaning system 1, a plurality of nozzles for spraying cleaning liquid are provided in order to clean various parts of the pan coating apparatus 2. Specifically, for bread cleaning, an outside pan cleaning nozzle 21 for cleaning the outside of the pan 3 and an inside pan cleaning nozzle 22 for cleaning the inside of the pan 3 are provided in the housing 5. ing. The pan outside cleaning nozzle 21 is arranged at the top of the housing 5 and also serves to clean the inside of the housing 5. Both the cleaning nozzles 21 and 22 are low-speed rotating cleaning nozzles, and when water flows through them, the tips of the nozzles rotate to clean the 360° surrounding area. The pan cleaning nozzle 22 is placed outside the pan during the coating process to prevent liquid dripping, and can also be inserted through the front opening 3a of the pan 3 during cleaning. Furthermore, a bread receiving roll cleaning nozzle 23 for cleaning the bread receiving roll 7 is provided on the front side of the bread 3.

Next, for cleaning the supply/exhaust system, nozzles are installed inside each supply/exhaust system member such as the supply air duct 12, the air supply chamber 10, the exhaust chamber 14, and the exhaust duct 13 for cleaning each duct and chamber. is set up. That is, the supply air duct 12 has a supply air duct cleaning nozzle 24 , the supply air chamber 10 has an air supply chamber cleaning nozzle 25 , the exhaust chamber 14 has an exhaust chamber cleaning nozzle 26 , and the exhaust duct 13 has an exhaust duct cleaning nozzle 27 . Each is provided. Furthermore, an exhaust chamber outer cleaning nozzle 28 is installed outside the exhaust chamber 14 . Furthermore, a housing drying air duct cleaning nozzle 29 is also provided within the housing drying air duct 15. Each of the nozzles 21 to 29 is also a low-speed rotating cleaning nozzle, and the cleaning liquid is supplied through a cleaning liquid supply line 30.

In such a pan coating apparatus 2, after coating a tablet or the like, the cleaning system 1 automatically cleans the apparatus main body, the supply/exhaust duct/chamber, and the liquid feeding line which is ancillary equipment. At this time, in the cleaning system 1 according to the present invention, cleaning water containing ultra-fine bubbles (hereinafter abbreviated as UFB), which are ultrafine bubbles with a diameter of less than 200 nm, is used as the cleaning liquid. Therefore, in the cleaning system 1, a UFB generator 31 is attached to the water supply pipe 20a of the liquid supply line 17 and the cleaning liquid supply line 30. This UFB generator 31 is installed in-line (in the middle of the route) and can be added to the conventional existing liquid feeding line 17 or cleaning liquid supply line 30 by retrofitting. Note that UFB is extremely small and colorless and transparent and cannot be visually recognized, and the cleaning liquid containing UFB (hereinafter abbreviated as UFB-containing water) is not cloudy and looks the same as normal water.

In this case, in the liquid supply line 17, water is supplied to the liquid tank 18 without operating the UFB generator 31 during the coating process, and a predetermined coating liquid is supplied from the liquid tank 18 to the spray nozzle 4. On the other hand, when performing a cleaning process, water (which may be city water, warm water, chemical solution, or purified water) is supplied to the liquid tank 18 while operating the UFB generator 31. At this time, no coating agent is supplied to the liquid tank 18. Then, UFB-containing water is generated using the UFB generator 31 and supplied to the liquid tank 18, and the pump 19 is operated. As a result, the UFB-containing water is supplied as a cleaning liquid to the spray nozzle 4 and is sprayed into the pan 3. As a result, the liquid tank 18, the liquid supply line 17 such as the connecting pipe 20b, the liquid supply hose, and the spray nozzle 4 are cleaned by the UFB-containing water.

On the other hand, the cleaning liquid supply line 30 is used only during cleaning processing. In the cleaning liquid supply line 30, a cleaning liquid is supplied by a pump (not shown), and UFB-containing water is generated by an in-line UFB generator 31. The generated UFB-containing water is supplied to each of the cleaning nozzles 21 to 29 as a cleaning liquid. Then, UFB-containing water is injected from each of the cleaning nozzles 21 to 29 to clean the inside and outside of the pan 3 and the air supply and exhaust system.

That is, the inside and outside of the pan 3 and the inside of the casing 5 are cleaned by the cleaning nozzles 21 to 23, and the ducts 12, 13, 15 and the chambers 10, 14 are cleaned by the cleaning nozzles 24 to 29, respectively, with UFB-containing water. At this time, the cleaning liquid injected into the bread chamber 6 is directly discharged from the drain pipe 32 provided at the bottom of the bread chamber 6 to the outside of the apparatus (in the case of running water cleaning). In addition, UFB-containing water can be stored in the lower part of the bread chamber 6 and the pan 3 can be rotated in this state to perform pool washing, and the cleaning liquid after the pool washing is discharged from the drain pipe 32.

As described above, in the cleaning system 1 according to the present invention, by installing the UFB generator 31 in-line in the liquid feeding line 17 and the cleaning liquid supply line 30, the liquid feeding line 17, the inside and outside of the pan 3, the supply and exhaust system, and the drainage piping 32, etc., the inside and outside of the device are washed with UFB-containing water. In this case, the liquid tank 18 of the liquid supply line 17, the connecting pipe 20b, etc. are cleaned by the minute vibrations (Brownian motion) of the UFB in the cleaning liquid. Further, the inside of the pan 3, the inside of the housing 5, each of the ducts 12, 13, 15, and the chambers 10, 14 are cleaned by the combined effect of the impact pressure effect caused by the bursting of bubbles of the UFB-containing water and the nozzle injection. Note that even when washing in a pool, the cleaning power increases due to the Brownian motion effect of UFB. Furthermore, the cleaning effect due to Brownian motion is also exhibited in the drain pipe 32.

Therefore, due to the action of UFB, the cleaning system 1 achieves a higher cleaning effect than the conventional system using bubbles with a diameter of 200 nm or more (microbubbles: hereinafter abbreviated as MB). becomes possible. FIG. 2 is a table showing the results of a cleaning test conducted by the inventors using MB and UFB.

As shown in FIG. 2, with MB-containing water, dirt remained in the corners and corners even after 15 minutes of running hot water (approximately 40 to 50°C), resulting in incomplete cleaning. On the other hand, with UFB-containing water, even after 15 minutes of washing with running city water (approximately 15°C), most of the dirt was removed from the area where the jet hit, and by performing an additional 15 minutes of washing, there was no remaining dirt. I was able to complete the cleaning. Therefore, in the cleaning system 1, it is possible to completely automatically clean the inside and outside of the pan coating apparatus, including the liquid supply line 17 and the supply/exhaust system, without performing manual operations such as finishing cleaning.

As described above, according to the cleaning system of the present invention, since the UFB generator 31 is installed in-line, the combined effect of the UFB action and nozzle jetting can efficiently and automatically It becomes possible to wash. As a result, it becomes possible to realize completely automatic cleaning of the inside and outside of the device, including the ancillary equipment, which has not been possible with MB in the past. Moreover, the UFB generator 31 can be retrofitted to the conventional existing liquid feeding line 17 and cleaning liquid supply line 30, and the cleaning effect of UFB can be improved from that of the conventional device without changing the conventional cleaning process (cleaning flow). It can be obtained as a synergistic effect. Therefore, it is possible to automate the cleaning process without causing a large increase in cost, and it is possible to realize efficiency in processing powder and granular materials such as tablet coating.

(Embodiment 2)
Next, a cleaning system according to a second embodiment of the present invention will be described. FIG. 3 is an explanatory diagram showing the configuration of a cleaning system 40 according to the second embodiment of the present invention, and shows the configuration during cleaning processing. In addition, in the following embodiments, the same parts and members as those in the cleaning system 1 of Embodiment 1 are given the same reference numerals, and the description thereof will be omitted.

A cleaning system 40 in FIG. 3 is an application of the present invention to an agitation granulation device. The stirring granulation device 41 shown in FIG. 3 is equipped with a bottomed, substantially cylindrical vessel (processing container) 42 into which powder and granules are fed and processed. Stir and granulate. A stirring blade 44 rotationally driven by a motor 43 is arranged at the center of the bottom of the vessel 42 . A side wall 42a of the vessel 42 is provided with a discharge section 45 for discharging the processed powder and granules, and a chopper 46 for crushing the powder and granules. An upper lid 47 is attached to the upper end of the vessel 42 so as to be openable and closable, and a spray nozzle 48 is attached to the upper lid 47.

Binder liquid is supplied to the spray nozzle 48 via the liquid feed line 17 . The liquid supply line 17 is provided with a liquid tank 18 for storing the binder liquid and a pump 19 for feeding the binder liquid from the liquid tank 18 to the spray nozzle 48 . Water is supplied to the liquid tank 18 from the water supply pipe 20a, where it is stirred and mixed with the binder agent to form a binder liquid. The binder liquid in the liquid tank 18 is supplied by the pump 19 to the spray nozzle 48 via the connecting pipe 20b, and is sprayed onto the powder or granular material to be treated in the vessel 42.

In such an agitation granulation device 41, processes such as agitation and granulation of powder and granules are performed in the following manner. Here, first, powder or granular material to be treated is charged from the upper end of the vessel 42. Next, the motor 43 is driven to rotate the stirring blades 44. At this time, a binder liquid is appropriately supplied into the vessel 42 through the spray nozzle 48, and the powder and granular material within the vessel 42 is stirred by the stirring blade 44 to be granulated. Note that purge air may be supplied from the bottom of the vessel 42. The granular material that has been subjected to processes such as stirring, mixing, and granulation in the vessel 42 is appropriately crushed by the chopper 46. Thereby, the powder is granulated in the stirring granulator 41, and a desired granular product is manufactured. The product that has been subjected to processes such as mixing and granulation is discharged from the discharge section 45.

Also in the agitation granulation device 41, after the granulation process of powder and granules, etc., the cleaning system 40 automatically cleans the liquid feeding line 17 and the vessel 42. Also in this case, UFB-containing water is used as the cleaning liquid. Therefore, in the cleaning system 40 as well, the UFB generator 31 is attached to the water supply pipe 20a of the liquid supply line 17. As in the case of Embodiment 1, in the liquid feeding line 17, water is supplied to the liquid tank 18 without operating the UFB generator 31 during processing such as granulation, and a predetermined binder liquid is supplied from the liquid tank 18. is supplied to the spray nozzle 48.

On the other hand, when performing a cleaning process, water is supplied to the liquid tank 18 while operating the UFB generator 31, and UFB-containing water is supplied to the liquid tank 18. Then, the pump 19 is operated to supply UFB-containing water to the spray nozzle 48 as a cleaning liquid. As a result, UFB-containing water is sprayed from the spray nozzle 48, and the liquid tank 18, the liquid feeding line 17 such as the connecting pipe 20b, and the spray nozzle 48 are cleaned with the UFB-containing water.

Further, in the cleaning system 40, a cleaning nozzle 49 is attached to the upper lid 47 to clean the inside of the vessel 42 during the cleaning process. A low-speed rotation type cleaning nozzle is used as the cleaning nozzle 49, and cleaning liquid is supplied through the cleaning liquid supply line 30. In the cleaning liquid supply line 30 , UFB-containing water is generated by an in-line UFB generator 31 and supplied to the cleaning nozzle 49 . The UFB-containing water supplied to the cleaning nozzle 49 is injected into the vessel 42 from the cleaning nozzle 49, and the inside of the vessel 42 is cleaned.

The UFB-containing water injected from the cleaning nozzle 49 is stored in the vessel 42 together with the UFB-containing water injected from the spray nozzle 48. Then, the vessel 42 is filled with UFB-containing water, and the inside of the vessel 42 is washed. At that time, the stirring blades 44 and the chopper 46 are operated. As a result, the side wall 42a of the vessel 42, the inside of the top lid 47, the stirring blade 44, the chopper 46, etc. are cleaned. While operating the stirring blades 44 and the chopper 46, the vessel 42 is pooled for a predetermined period of time, and after the pooling cleaning is completed, the cleaning liquid in the vessel 42 is discharged from the discharge section 45. In this case as well, the inside of the vessel 42 may be washed with running water by pouring the washing liquid from the spray nozzle 48 or the washing nozzle 49.

In this way, in the cleaning system 40, by installing the UFB generator 31 in-line in the liquid feeding line 17 and the cleaning liquid supply line 30, the inside and outside of the device, such as the liquid feeding line 17, the inside of the vessel 42, and the discharge part 45, are exposed to UFB. Washed with water containing water. In this case, as described above, the liquid feeding line 17 is cleaned by the Brownian motion of the UFB, and the inside of the vessel 42 is cleaned by the combined effect of the impact pressure effect due to the bursting of bubbles of the UFB-containing water and the nozzle injection. Further, the discharge section 45 is also cleaned by the Brownian motion of the UFB.

Therefore, according to the cleaning system 40, by installing the UFB generator 31 in-line, the combined effect of the UFB action and the nozzle jet can be used to completely automatically clean the inside and outside of the device, including the ancillary equipment, which could not be achieved with the MB. It becomes possible to realize this. Moreover, the UFB generator 31 can be retrofitted to the conventional existing liquid feeding line 17 and cleaning liquid supply line 30, and the cleaning effect of UFB can be improved from that of the conventional device without changing the conventional cleaning process (cleaning flow). It can be obtained as a synergistic effect. Therefore, it is possible to automate the cleaning process without causing a large increase in cost, and it is possible to improve the efficiency of powder processing such as agitation granulation.

(Embodiment 3)
Furthermore, a cleaning system according to a third embodiment of the present invention will be explained. FIG. 4 is an explanatory diagram showing the configuration of a cleaning system 50 according to Embodiment 3 of the present invention. A cleaning system 50 in FIG. 4 is an application of the present invention to a fluidized bed apparatus. As shown in FIG. 4, the fluidized bed apparatus 51 has a processing container 52 in which a powder or granule material to be processed is accommodated and subjected to granulation coating processing, drying processing, etc. A granulation coating process is performed on the object to be treated.

The processing container 52 is formed in a cylindrical shape, and has a configuration in which a filter casing 53, a spray casing 54, a raw material container container 55, and an air supply unit 56 are vertically stacked one on top of the other in order from the top. An exhaust port 57 is formed at the upper end of the filter casing 53, and the exhaust port 57 is connected to an exhaust facility (not shown). A filter 58 is attached to the lower end of the filter casing 53 and between it and the spray casing 54 . A cleaning shower ball (cleaning nozzle) 59 is installed inside the filter casing 53 . The shower ball 59 has a spherical head and can spray cleaning liquid 360°. A cleaning liquid is supplied to the shower ball 59 via a cleaning liquid supply line 30 .

The inside of the spray casing 54 is a flow chamber 60. A spray nozzle 61 is installed in the flow chamber 60 for spraying a binder liquid or a coating liquid (hereinafter abbreviated as binder liquid or the like) onto the powder material. Binder liquid and the like are supplied to the spray nozzle 61 via the liquid feed line 17 . The liquid feeding line 17 is provided with a liquid tank 18 that stores a binder liquid and the like, and a pump 19 that feeds the binder liquid and the like from the liquid tank 18 to the spray nozzle 61. Water is supplied to the liquid tank 18 from a water supply pipe 20a, where it is stirred and mixed with a binder agent and a coating agent to form a binder liquid and the like. The binder liquid and the like in the liquid tank 18 are supplied by the pump 19 to the spray nozzle 61 via the connecting pipe 20b, and are sprayed onto the granular material to be treated in the spray casing 54.

Further, in the cleaning system 50, a three-dimensional nozzle (cleaning nozzle) 62 for spraying a cleaning liquid is provided in the spray casing 54 in order to clean the spray casing 54 and the raw material container container 55. The three-dimensional nozzle 62 is capable of spraying cleaning liquid in vertical and horizontal directions, and is inserted into the spray casing 54 during cleaning processing. Cleaning liquid is supplied to the three-dimensional nozzle 62 via the cleaning liquid supply line 30.

A raw material container 55 is disposed below the spray casing 54, and powder and granular material to be treated is put into the raw material container 55. An air supply unit 56 is installed below the raw material container 55. The interior of the air supply unit 56 is an air supply chamber 63. An air supply duct 64 communicating with the air supply chamber 63 is attached to the air supply unit 56 . The air supply duct 64 is connected to an air supply source (not shown) provided outside the device. A processing gas (fluidizing air) for fluidizing the powder is supplied into the air supply chamber 63 through the air supply duct 64 .

In such a fluidized bed device 51, fluidized air is supplied from the air supply duct 64 to the air supply chamber 63. The fluidized air forms a swirling airflow within the processing container 52 and blows up the powder and granular material within the processing container 52. The blown up powder and granules become fluidized in the fluidization chamber 60 and are stirred and mixed. Then, a suitable binder liquid or the like is sprayed from the spray nozzle 61 onto the fluidized powder or granular material. As a result, the fluidized bed device 51 performs granulation and coating of the powder. On the other hand, the processing gas that has made the powder into a fluidized state is purified by removing fine solid particles by the filter 58, and then is discharged from the apparatus through the exhaust port 57.

In the fluidized bed apparatus 51 as well, the cleaning system 50 automatically cleans the liquid feeding line 17 and the processing container 52 after the granulation process of the powder and granules. Also in this case, UFB-containing water is used as the cleaning liquid. For this reason, the cleaning system 50 also includes a UFB generator 31 attached to the water supply pipe 20a of the liquid supply line 17 and the cleaning liquid supply line 30.

In the liquid supply line 17, water is supplied to the liquid tank 18 without operating the UFB generator 31 during processing such as granulation, and a predetermined amount of water is supplied from the liquid tank 18, as in the first and second embodiments. Binder liquid and the like are supplied to the spray nozzle 61. On the other hand, when performing a cleaning process, water is supplied to the liquid tank 18 while operating the UFB generator 31. At this time, no binder agent or the like is supplied to the liquid tank 18. Then, UFB-containing water is generated using the UFB generator 31 and supplied to the liquid tank 18, and the pump 19 is operated. As a result, UFB-containing water is supplied to the spray nozzle 61 as a cleaning liquid and is injected into the flow chamber 60 . As a result, the liquid tank 18, the liquid feeding line 17 such as the connecting pipe 20b, and the spray nozzle 61 are cleaned by the UFB-containing water.

Further, in the fluidized bed apparatus 51 as well, a UFB generator 31 is attached to the cleaning liquid supply line 30. In the cleaning liquid supply line 30 , UFB-containing water is generated by an in-line UFB generator 31 and supplied to the shower ball 59 and the three-dimensional nozzle 62 . As a result, UFB-containing water is sprayed from the shower ball 59, and the inside of the filter casing 53 and the upper surface of the filter 58 are cleaned. Further, the cleaning liquid is also sprayed from the three-dimensional nozzle 62 in the vertical and horizontal directions, and not only the inside of the spray casing 54 but also the lower surface side of the filter 58 and the raw material container 55 are cleaned with the UFB-containing water. Note that cleaning nozzles may also be provided in the exhaust port 57 and the air supply duct 64, and the cleaning liquid may be supplied from the cleaning liquid supply line 30.

In this way, in the cleaning system 50, the cleaning liquid containing UFB is sprayed from the three-dimensional nozzle 62 and the shower ball 59 arranged in the processing container 52, and the filter casing 53, the spray casing 54, and the raw material container 55 are sprayed with the UFB-containing water. Wash at The UFB-containing water sprayed from the three-dimensional nozzle 62 and the shower ball 59 flows into the air supply unit 56 together with the UFB-containing water sprayed from the spray nozzle 61. The inside of the air supply unit 56 is also cleaned with the UFB-containing water, and the cleaning liquid that cleaned the inside of the air supply unit 56 is discharged from the drain pipe 65. Note that during the cleaning process, the drainage pipe 65 may be closed and the inside of the processing container 52, such as the inside of the air supply unit 56 or the inside of the raw material container 55 or the spray casing 54 thereon, may be pooled and washed as appropriate. Furthermore, the inside of the air supply duct 64 may also be cleaned.

Also in the cleaning system 50, as in the first and second embodiments, by installing the UFB generator 31 in-line in the liquid feeding line 17 and the cleaning liquid supply line 30, the liquid feeding line 17, the processing container 52, etc. is washed with UFB-containing water. In this case, as described above, the liquid feeding line 17 is cleaned by the Brownian motion of the UFB, and the inside of the processing container 52 is cleaned by the combined effect of the impact pressure effect due to the bursting of bubbles of the UFB-containing water and the nozzle jetting. Furthermore, the air supply unit 56 is also cleaned by the Brownian motion of the UFB.

Therefore, according to the cleaning system 50, by installing the UFB generator 31 in-line, the combined effect of the UFB action and nozzle jetting allows for completely automatic cleaning of the inside and outside of the device, including the ancillary equipment, which could not be achieved with the MB. It becomes possible to realize this. Moreover, the UFB generator 31 can be retrofitted to the conventional existing liquid feeding line 17 and cleaning liquid supply line 30, and the cleaning effect of UFB can be improved from that of the conventional device without changing the conventional cleaning process (cleaning flow). It can be obtained as a synergistic effect. Therefore, it is possible to automate the cleaning process without causing a large increase in cost, and it is possible to improve the efficiency of powder processing such as agitation granulation.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the gist thereof.
For example, in the embodiments described above, the cleaning system according to the present invention is applied to a pan coating device, an agitation granulation device, or a fluidized bed device, but the cleaning system of the present invention can be applied to a pan coating device having a configuration other than the above embodiments. It is also applicable to powder processing devices other than the embodiments, such as a coating device, an agitation granulation device, a fluidized bed device, a centrifugal rolling granulation device, and a pulverization device. Moreover, the nozzles used in each embodiment are also examples, and each cleaning nozzle is not limited to a low-speed rotation type cleaning nozzle, a shower ball, or a three-dimensional nozzle. For example, a shower ball or a three-dimensional nozzle may be used as the above-mentioned cleaning nozzles 21 to 29, 49, or a low-speed rotating cleaning nozzle may be used in place of the shower ball 59 or the three-dimensional nozzle 62. It is also possible to use types of nozzles other than those described above, such as common injection nozzles. In addition, the various numerical values shown in the above-described embodiments are merely examples, and the present invention is not limited to the above numerical values.

The present invention is applicable not only to cleaning systems for powder and granular material processing equipment, but also to cleaning lines for semiconductor manufacturing equipment and the like.

1 Cleaning system 2 Pan coating device 3 Coating pan 3a Front opening 4 Spray nozzle 5 Housing 6 Bread chamber 7 Bread receiving roll 8 Body 9 Ventilation hole 10 Air supply chamber 11 Front door 12 Air supply duct 13 Exhaust duct 14 Exhaust chamber 15 Housing drying air duct 16 Gun holder 17 Liquid feeding line 18 Liquid tank 19 Pump 20a Water feeding piping (first piping)
20b Connection piping (second piping)
21 Pan outside cleaning nozzle 22 Pan inside cleaning nozzle 23 Pan receiving roll cleaning nozzle 24 Supply air duct cleaning nozzle 25 Supply air chamber cleaning nozzle 26 Exhaust chamber cleaning nozzle 27 Exhaust duct cleaning nozzle 28 Exhaust chamber outside cleaning nozzle 29 Housing dry air duct cleaning Nozzle 30 Cleaning liquid supply line 31 UFB generator 32 Drain piping 40 Cleaning system 41 Stirring granulation device 42 Vessel 42a Side wall 43 Motor 44 Stirring blades 45 Discharge section 46 Chopper 47 Upper lid 48 Spray nozzle 49 Cleaning nozzle 50 Cleaning system 51 Fluidized bed device 52 Processing container 53 Filter casing 54 Spray casing 55 Raw material container 56 Air supply unit 57 Exhaust port 58 Filter 59 Shower ball 60 Flow chamber 61 Spray nozzle 62 Three-dimensional nozzle 63 Air supply chamber 64 Air supply duct 65 Drainage pipe O Rotation axis

Claims (10)

A cleaning system that performs a cleaning process for a powder or granular material processing apparatus having a processing container that accommodates a powder or granular material, and a spray nozzle that sprays a predetermined treatment liquid onto the powder or granular material in the processing container,
a liquid feeding line that supplies the processing liquid to the spray nozzle;
a cleaning nozzle disposed within the processing container and spraying a cleaning liquid for cleaning the inside of the processing container;
a cleaning liquid supply line that supplies the cleaning liquid to the cleaning nozzle;
an ultra-fine bubble generator that is disposed in each path of the liquid feeding line and the cleaning liquid supply line and forms bubbles with a diameter of less than 200 nm,
A cleaning system for a powder or granular material processing apparatus, characterized in that a cleaning liquid containing ultra-fine bubbles with a diameter of less than 200 nm is supplied to the spray nozzle and the cleaning nozzle during cleaning of the powder or granular material processing apparatus. The powder processing equipment cleaning system according to claim 1,
The liquid supply line includes a liquid tank in which the processing liquid is stored, a pump that feeds the processing liquid in the liquid tank to the nozzle, a first pipe that supplies water to the liquid tank, and a first pipe that supplies water to the liquid tank. a second pipe connecting the tank and the pump, and the pump and the spray nozzle, respectively;
A cleaning system for a powder or granular material processing apparatus, wherein the ultra-fine bubble generator is disposed in a path of the first pipe. The granular material processing equipment cleaning system according to claim 1 or 2,
The granular material processing device includes:
a casing that accommodates the processing container;
an air supply and exhaust system member for supplying processing gas into the processing container and exhausting the processing gas from the processing container,
disposing the cleaning nozzle within the housing, within the processing container, and within the supply/exhaust system member;
During the cleaning process of the powder processing apparatus, a cleaning liquid containing the ultra-fine bubbles is injected from the cleaning nozzle into the housing, the processing container, and the air supply/exhaust system member. Body treatment equipment cleaning system. The granular material processing equipment cleaning system according to claim 3,
The powder or granular material processing apparatus is a pan coating apparatus that is equipped with a coating pan as a processing container that is rotatably provided around a rotation axis and accommodates the powder or granular material to be processed. Processing equipment cleaning system. The granular material processing equipment cleaning system according to claim 1 or 2,
A cleaning system for a powder/granular material processing apparatus, wherein the powder/granular material processing apparatus is an agitation granulation apparatus equipped with a bottomed substantially cylindrical vessel as a processing container. The granular material processing equipment cleaning system according to claim 1 or 2,
A cleaning system for a powder/granular material processing apparatus, wherein the powder/granular material processing apparatus is a fluidized bed apparatus in which a cylindrical container is vertically arranged as a processing container. In the powder processing equipment cleaning system according to any one of claims 1 to 6,
A cleaning system for a powder processing device, wherein the cleaning nozzle is a low-speed rotating nozzle whose tip rotates when water flows through it. In the powder processing equipment cleaning system according to any one of claims 1 to 6,
A cleaning system for a powder processing apparatus, wherein the cleaning nozzle is a three-dimensional nozzle that can spray the cleaning liquid in up, down, left and right directions. In the powder processing equipment cleaning system according to any one of claims 1 to 6,
A cleaning system for a powder processing apparatus, wherein the cleaning nozzle is a shower ball having a spherical head. In the powder processing equipment cleaning system according to any one of claims 1 to 9,
A cleaning system for a granular material processing apparatus, characterized in that the cleaning liquid contains ultra-fine bubbles with a diameter of less than 200 nm in any one of city water, hot water, chemical solution, and purified water.

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