JP3398256B2 - Fluidized bed apparatus and method of cleaning bag filter thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluidized bed apparatus for easily cleaning a bag filter and a method for cleaning the bag filter.

[0002]

2. Description of the Related Art For example, while a powder or granule such as powder or granules used for pharmaceuticals or foods is in a fluid state, a binder liquid or a coating liquid is sprayed on the powder or granule to perform granulation or coating of the granule. Alternatively, a fluidized bed apparatus is used to perform the drying process of the powder and granules. In this fluidized bed apparatus, a bag filter is installed so as not to let the fine powder or powder rising suddenly out of the system in order to perform various treatments while making the powder or granular material in a fluidized state by air. ing.

The powder adhering to the bag filter is wiped off during operation by an appropriate method such as shaking which applies mechanical vertical vibration to the bag filter or pulse jet which backwashes by blowing compressed air. However, they cannot be completely removed, and they gradually accumulate to increase the air flow resistance. Further, when it is necessary to process different types of powder or granules using the same fluidized bed device or to spray different binder liquids or coating liquids on each other, when performing different treatments , It will be necessary to clean the bag filter.

Generally, the cleaning of the bag filter is performed manually by removing the bag filter from the fluidized bed apparatus, but this requires a lot of manpower and time. For this reason,
Several automatic cleaning devices have been proposed. For example,
Japanese Utility Model Application Laid-Open No. 60-176240 discloses a device in which a bag filter is lowered in a fluidized bed apparatus and is washed by a lower fixed cleaning nozzle and a lower upper cleaning nozzle which are waiting. There is. JP-A-3-80908
Japanese Patent Laid-Open Publication No. Hei 5-218353 discloses a cleaning device in which air outlets are formed in the upper and lower portions of a cleaning tank. In Japanese Patent Laid-Open No. 5-228353, the technique described in Japanese Utility Model Laid-Open No. 60-176240 is improved. However, there is disclosed a device in which a dedicated cleaning container is attached to the lower part of the fluidized bed device at the time of cleaning, and the number of cleaning nozzles is increased and the cleaning nozzle is rotated two-dimensionally or three-dimensionally.

[0005]

However, in the device disclosed in Japanese Patent Laid-Open No. 3-80908, the bag filter must be removed from the support seat to which it is attached. In addition, there is a drawback that the inner surface of the bag filter cannot be completely cleaned, and in particular, the powder insoluble in the water that has fallen off the inner surface cannot be sufficiently washed out.

The biggest problem with these devices is that
The problem is that the bag filter cannot be completely cleaned.

That is, the nozzle of the apparatus described in Japanese Utility Model Laid-Open No. 60-176240 has a fixed upper and lower part, and in particular, since the lower nozzle is installed under the sintered wire mesh unit, the inner surface of the bag filter is Washing is incomplete. Further, since the upper and lower nozzles are also fixed, there are many portions where the jetted liquid does not reach directly. The apparatus described in Japanese Patent Laid-Open No. 5-228353 has improved this point considerably, but the cleaning of the side surface of the bag filter is extremely incomplete, and the liquid jetted from above also causes the nozzle and bag filter Since the relative position is fixed, it is inevitable that a blind spot will occur even if a three-dimensional rotary nozzle is used.

In the devices disclosed in Japanese Utility Model Laid-Open No. 60-176240 and Japanese Patent Laid-Open No. 5-228353, it is not necessary to remove the bag filter from the support seat. However, in the method of removing the bag filter, after cleaning and drying the fluidized bed apparatus main body which is completed in a short time, it is possible to operate by immediately installing a spare bag filter,
These methods have a drawback that they cannot be operated during cleaning of a bag filter which requires a long time. In particular, JP-A-5-22
In the apparatus described in Japanese Patent No. 8353, after cleaning the main body,
Since the bag filter is subsequently washed, it takes extra time.

All of these devices have a complicated mechanism and the cleaning operation is complicated, but the cleaning effect is not perfect, and in particular, the strict validation standard required in the pharmaceutical industry is used. No bag filter cleaning device to satisfy has been developed.

An object of the present invention is to provide a technique for surely cleaning a bag filter with a simple device and operation.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0012]

The typical ones of the inventions disclosed in the present application will be outlined below.

That is, the fluidized bed apparatus of the present invention comprises a tubular main body having a filter chamber in which a filter member is incorporated, and the tubular main body is formed by a plurality of tubular bodies connected to each other by connecting portions, A watertight partition member is removably provided at the connecting portion of the tubular body.

Further, the bag filter cleaning method of the present invention comprises a step of mounting a watertight partition member on a cylindrical main body having a filter chamber in which a filter member is incorporated, and a cleaning chamber formed above the partition member. And a step of supplying a cleaning liquid to the filter member, and the filter member is cleaned with the cleaning liquid.

[0015]

According to the above-mentioned technique, the filter chamber formed in the cylindrical main body at the time of cleaning the filter member becomes the cleaning chamber by the partition member having the watertight structure, and the cleaning liquid is injected into the cleaning chamber to filter the filter member. Can be washed. When treating a granular material using a fluidized bed apparatus, a partition member is removed from a cylindrical main body and fine particle particles are removed by a filter member. When the filter member is provided with a mechanism for shaking the granular material in a fluidized state, the mechanism may be used to shake the filter member when cleaning. Further, the cleaning liquid may be stirred. In a fluidized bed apparatus including a tubular body for filtering and a tubular body for fluidization, the tubular bodies of which are separable from each other, a partition member is watertightly sandwiched between the tubular bodies.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a front view showing the appearance of a fluidized bed apparatus which is an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.

The fluidized bed apparatus shown in the drawing is used for coating the surface of powder particles, and the filter cylinder 11 in which the filter chamber 11a is formed and the spray chamber, that is, the fluid chamber 12a, is disposed below this. The filter cylinder 11 is provided with an openable / closable top plate 13, and the top plate 13 closes the upper end of the filter cylinder 11. These cylinders 11, 12
Are clamped together by a clamp member 14 to form a tubular body 15. Thus, in the illustrated case, the tubular main body 15 includes the filter tubular body 11 and the flow tubular body 12.
It is formed of two tubular bodies, and the lower end portion of the filter tubular body 11 serves as a connecting portion, and the upper end portion of the flow tubular body 12 serves as a connecting portion.
Are connected.

The filter cylinder 11 is fixedly supported by a column 17 via a fixing member 16. Flow cylinder 1
Reference numeral 2 is a slider 1 slidably provided on the column 17.
8 is attached via a connecting member 19 and is vertically movable.

As shown in FIG. 2, an air supply section 21 having an air supply chamber 21a therein is installed below the cylindrical main body 15, and between the air supply section 21 and the cylindrical main body 15. A raw material container 22 having a raw material storage chamber 22a is arranged therein. The raw material container 22 is fastened to the flow cylinder 12 by a clamp member 23. The raw material container 22 is formed in a cylindrical shape having a smaller diameter toward the lower side and has wheels 24 for traveling. It is attached to a carriage 25 and is movable. In the raw material container 22,
As shown in FIG. 2, a rectifying member 26 made of wire mesh and having air permeability is provided.
It is thrown into a and supported on the rectifying member 26.

The air supply unit 21 is connected to an air supply duct 27 communicating with the air supply chamber 21a, and the air supply unit 21 has a vertically movable annular frame 28 and a bellows portion 2 which is vertically expandable and contractible.
9 and 9. The pneumatic cylinder 3 is provided in the air supply unit 21.
0 is arranged, and the rod 31 of the pneumatic cylinder 30 is connected to the annular frame 28 by a plurality of connecting members 32 extending in the radial direction. Pneumatic cylinder 30 and rod 3
1 is shielded from the air supply chamber 21a by the shield member 34 having the bellows portion 33.

Therefore, when the pneumatic cylinder 30 is driven to lower the annular frame 28 with the clamp member 23 removed, the wheels 24 come into contact with the floor surface and the trolley 25 becomes runnable, and the powder particles are removed. Raw material container 2 after processing
2 can be carried out, or the raw material container 22 in which the unprocessed powder or granular material is charged can be carried in. Cylindrical body 15 and air supply unit 2
1, the pneumatic cylinder 30 is driven in a state where the raw material container 22 is carried in, and the annular frame 28 is raised.
The raw material container 22 and the flow cylinder 1 using the clamp member 23.
When 2 and 2 are fastened to each other, the fluidized bed apparatus is in a processable state as shown in the figure.

The flow tube 12 is provided with a spray nozzle 35 for spraying a binder liquid or a coating liquid onto the powder particles. In addition, the filter unit 3 is provided in the filter chamber 11a of the filter cylinder 11.
6 is provided, and an exhaust duct 37 is connected to the filter cylinder 11 so as to communicate with the filter chamber 11a.

3 and 4 show a filter unit 36.
FIG. 3 is a diagram showing the details of the above, and the filter unit 36 has a plurality of bag filters 40. Each bag filter 40 has a cylindrical shape with an upper end closed and a lower end opened, and each lower end is attached to a disc-shaped base 41 having a plurality of holes corresponding to the openings of the bag filter 40. It is one. The bag filter 40 and the base 41 are each formed of a filter material such as cloth, and the base 4
An annular reinforcing wire made of metal, resin, or the like is sewn on the outer peripheral portion of 1, and the outer peripheral portion of the filter cylinder 11 is
And the flow tube 12 are sandwiched and fixed.

As shown in FIG. 4, each bag filter 40 is suspended from a plurality of concentric annular frame members 42 by suspenders 43, and each annular frame member 42 is connected in the radial direction. It is integrated by 44.
A drive shaft 45 is rotatably attached to the filter cylinder 11, and a suspension fitting 47 for suspending the annular frame 42 is pin-connected to the tip of a swing arm 46 fixed to the drive shaft 45. Has been done.

In order to swing the drive shaft 45 back and forth at a predetermined turning angle, a pneumatic cylinder 49 is attached to a supporting plate 48 fixed to the filter cylinder 11 by a supporting bracket 51, and the pneumatic cylinder 49 is attached. A lever 53, which is pin-connected to the rod 52, is fixed to the drive shaft 45. Thus, by driving the pneumatic cylinder 49, the upper end of each bag filter 40 vibrates vertically between the position shown by the solid line and the position shown by the chain double-dashed line in FIG.

In order to perform granulation or coating treatment of powder or granules using such a fluidized bed apparatus, the raw material container 22 containing the powder or granules is installed in the state shown in FIGS. 1 and 2, and air is supplied. The gas supplied from the duct 27 to the air supply unit 21 is supplied into the raw material container 22 through the gap between the flow regulating members 26. As a result, the powder and granules become the raw material container 22 and the flow cylinder 12.
Inside, a fluid state is established, and under this state, the coating liquid is sprayed from the spray nozzle 35, so that the powder or granular material is coated.

The binder liquid is sprayed from the spray nozzle 35 in the case of granulating the powder or granules, and the spray nozzle 35 is in a rest state in the case of drying the powder or granules. In this way, the same fluidized bed apparatus can be used to perform granulation of powder, granule coating, and drying.

The gas in which the powder and granules are in a fluid state is discharged through the exhaust duct 37 after the fine solid particles are removed and cleaned by the bag filter 40. In the process of granulating and coating with the granules in a fluid state,
By swinging the swing arm 46 to perform the shaking operation, the fine particles attached to the bag filter 40 are dropped and wiped off, and the bag filter 40 is prevented from being clogged.

FIGS. 5A and 5B are views showing a partition plate 55. As shown in the drawing, the partition plate 55 has a flat surface and a drain pipe 57 having an opening / closing cock 56. It is provided on the lower surface of the partition plate 55. This partition plate 55 is provided between the filter cylinder 11 and the flow cylinder 12 when the bag filter 40 is washed, that is, both cylinders 1
It is attached to the connecting portion of 1, 12. When installed,
The partition plate 55 is in close contact with the filter cylinder 11 via a sealing material or the like so as not to create a gap, and has a watertight structure.

The filter cylinder 11 is provided with a supply pipe 58 for injecting a cleaning liquid into the cleaning chamber formed in the cylindrical main body 15 by mounting the partition plate 55. As the cleaning liquid, clean water, warm water, water containing a detergent, or the like can be used. The partition plate 55 may be made of any material such as metal or synthetic resin, and may be rigid or flexible such as a film.

Next, the procedure for cleaning the bag filter 40 will be described with reference to FIG.

First, as shown in FIG. 6A, the clamp member 14 is removed from the tubular main body 15 and the flow tube 12 is separated from the filter tube 11. Next, as shown in FIG. 6B, the base portion 41 of the filter unit 36 is sandwiched between the two cylindrical bodies 11 and 12, and the partition plate 5 is inserted.
5 is attached so that the lower part of the filter cylinder 11 has a watertight structure. As a result, the lower end of the filter chamber 11a in the filter cylinder 11 is closed to serve as a cleaning chamber. The base 4
1 may not be sandwiched between the two cylinders 11 and 12. In FIG. 3, the partition plate 55 mounted between both the cylinders 11 and 12 is shown by a chain double-dashed line.

As shown in FIG. 6C, the cleaning liquid L is injected into the cleaning chamber from the supply pipe 58. When the cleaning liquid L is injected up to a predetermined liquid level, as shown in FIG. 6D, when the pneumatic cylinder 49 is driven to swing the swing arm 46, the bag filter 40 has the upper end portion of the cleaning liquid L. L
Shaking operation, that is, vibrating operation, is performed so as to move up and down. As a result, foreign matter such as fine particles attached to the bag filter 40 is removed from the bag filter 40.

After performing the shaking operation for a predetermined time,
As shown in FIG. 6E, the opening / closing cock 56 is opened to discharge the cleaning liquid L. In this way, one washing operation is completed, and if necessary, FIG. 6 (c) to FIG. 6 (e).
The washing process of is repeated a predetermined number of times. While the bag filter 40 is being cleaned, the inside of the flow tube 12 and the raw material container 22 may be simultaneously cleaned by spraying a cleaning liquid from a cleaning nozzle (not shown). After the bag filter 40 is cleaned, the partition plate 55 is removed and the drying gas is supplied from the air supply duct 27 to the cylindrical main body 1.
The bag filter 40 is dried by pouring into the bag 5.

Although the partition plate 55 shown in the figure has a flat plate shape, it may have a funnel shape as shown in FIG. 5C, and may have another arbitrary cross-sectional shape. Further, the partition plate 55 is slidably installed in a horizontal manner with respect to the flow cylinder 12 by using a guide rail or the like, and the partition plates are automatically separated in a state where both the cylinder bodies 11 and 12 are separated from each other. 55
May be attached and detached.

In the illustrated embodiment, the partition plate 55
Although it is mounted between the filter cylinder 11 and the flow cylinder 12, it may be mounted between the flow cylinder 12 and the raw material container 22. Further, the bag filter 40 has its lower end outer peripheral portion sandwiched between the cylindrical bodies 11 and 12 together with the partition plate 55, but may be washed in a free state. Further, in the case shown in the drawing, the shaking operation at the time of cleaning the bag filter 40 is performed by using the pneumatic cylinder 49 in order to vibrate the bag filter 40 in the process of processing the powder and granules. The bag filter 40 may be vibrated only during cleaning. And the bag filter 40
It is also possible to blow the liquid jet into the cleaning liquid L or rotate the stirring blades to stir the cleaning liquid without performing the shaking operation at the time of cleaning, thereby performing the cleaning.

FIG. 7 is a schematic sectional view showing a part of a fluidized bed apparatus according to another embodiment of the present invention, in which a base 41 of the bag filter 40 is provided with an annular stopper 61.
The stopper 61 is fixed to the filter cylinder 11 by a hollow seal member 62 provided between the stopper 61 and the filter cylinder 11. The hollow seal member 62 is made of an elastic member such as rubber, is formed of a tubular member having a hollow inside, and is expanded and contracted by an air supply pipe.

By expanding the bag filter 40, the stopper portion 61 of the bag filter 40 is fixed to the filter cylinder 11 to prevent air from leaking when the powder particles are coated, and the bag filter 40 is also prevented. At the time of cleaning, the bag filter 40 is in a state where the lower end portion is fixed by the fastening portion 61. On the other hand, when replacing the filter unit 36, the fixed state is released by discharging the air inside the hollow seal member 62. As in the embodiment shown in FIG. 2, the hollow seal member 62 is used as shown in FIG. 7 without sandwiching the base portion 41 between the filter cylinder 11 and the flow cylinder 12, and the lower end of the filter unit 36 is used. The parts may be fixed.

In the fluidized bed apparatus shown in FIG. 7, the drainage pipe 57a having the opening / closing cock 56a is provided with the filter cylinder 11.
The drainage pipe is not provided in the partition plate 55 unlike the fluidized bed apparatus shown in FIG. In this case, when the cleaning liquid is discharged to the outside after the cleaning work of the bag filter 40 is completed, the filter cylinder 1 forming the cylindrical body 15 does not pass through the flow cylinder 12 and the like.
The cleaning liquid can be directly discharged from 1.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, although the present embodiment shows a fluidizing device for applying a coating to a powder or granular material, the present invention can be applied to a device for granulating or drying the powder or granular material. . Further, in this embodiment, the bag filter 40 is shaken by using a pneumatic cylinder, but various driving means such as a motor can be used. Further, as a bag filter that can be used, various types such as a square plate shape can be used in addition to the cylindrical shape shown.

In order to move the filter unit 36 up and down when cleaning the bag filter 40, the fluid bed apparatus shown in FIG. 7 uses a wire 63 for suspending the filter unit 36. The wire 63 is reciprocally moved in a linear direction with a predetermined stroke as shown by an arrow to move the filter unit 36 up and down, whereby the bag filter 40
Is washed. However, the swing arm 46 may be swung like the fluidized bed apparatus of FIG.

[0044]

The effects obtained by the typical ones of the inventions disclosed in this application will be briefly described as follows.

(1). The filter can be cleaned easily and surely in a short time with an extremely simple and inexpensive device.

(2). The lower part of the partition member can be cleaned simultaneously with the filter using a cleaning nozzle or the like.

[Brief description of drawings]

FIG. 1 is a schematic front view showing a fluidized bed apparatus which is an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the side surface of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5A is a perspective view showing a partition plate, and FIG.
Is a sectional view of a partition plate, and (c) is a sectional view of another type of partition plate.

6 (a) to 6 (e) are process diagrams showing a cleaning procedure of the fluidized bed apparatus.

FIG. 7 is a schematic sectional view showing a part of a fluidized bed apparatus which is another embodiment of the present invention.

[Explanation of symbols]

11 Filter cylinder 12 Flow cylinder 13 Top plate 14 Clamp member 15 Tubular body 16 Fixed member 17 props 18 slider 19 Connection member 21 Air supply unit 22 Raw material container 23 Clamping member 24 wheels 25 dolly 26 Straightening member 27 Air supply duct 28 annular frame 29 Bellows 30 pneumatic cylinders 31 rod 32 Connection member 33 Bellows 34 Shielding member 35 spray nozzles 36 Filter Unit 37 Exhaust duct 40 Bug Filter 41 base 42 annular frame 43 Hanging equipment 44 Connection member 45 drive shaft 46 swing arm 47 Hanging bracket 48 Support plate 49 Pneumatic cylinder 51 support bracket 52 rod 53 lever 55 Partition plate (partition member) 56,56a Open / close cock 57, 57a drainage pipe 58 supply pipe (cleaning liquid supply means) 61 Fastening part 62 Hollow seal member 63 wire

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jun Hishida 588 Kanayagawara, Kanaya-cho, Haibara-gun, Shizuoka Daiichi Pharmaceutical Co., Ltd. Shizuoka Factory, Formulation Technology Center (72) Inventor Takei Narimichi Takadanobaba, Shinjuku-ku, Tokyo 2-14-2 Freund Sangyo Co., Ltd. (72) Inventor Kazuomi Uno 2-14-2 Takadanobaba, Shinjuku-ku, Tokyo Inside Freund Sangyo Co., Ltd. (56) Reference JP-A-5-228353 (JP , A) JP-A-54-25571 (JP, A) Actually opened 60-176240 (JP, U) Actually opened 62-126216 (JP, U) Actually opened 3-3420 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B01D 46/04 B01J 2/00

Claims (6)

(57) [Claims] 1. A fluidized bed apparatus comprising a tubular main body having a plurality of tubular bodies connected to each other by a connecting portion and having a filter chamber in which a filter member is incorporated, the fluidized bed apparatus comprising: A fluidized bed apparatus characterized in that a watertight partition member is detachably provided at a connecting portion. 2. A tubular main body having a filter chamber containing a filter member and a flow chamber located below the filter chamber, an air supply unit disposed below the tubular main body, and the tubular member. A raw material container disposed between the main body, a partition member that is attached to the tubular main body when cleaning the filter member and forms a cleaning chamber in the tubular main body, and a partition member formed above the partition member. And a cleaning liquid supply means for supplying a cleaning liquid for cleaning the filter member into the cleaning chamber. 3. The fluidized bed apparatus according to claim 1, wherein the partition member or the cylindrical main body is provided with a drainage means. 4. The fluidized bed apparatus according to any one of claims 1 to 3, wherein the fluidized bed apparatus has a blow-off means for shaking the filter member. 5. A step of mounting a watertight partition member on a tubular main body having a filter chamber in which the filter member is incorporated,
And a step of supplying a cleaning liquid to a cleaning chamber formed on the upper side of the partition member, and cleaning the filter member with the cleaning liquid. 6. The method for cleaning a bag filter according to claim 5, wherein the filter member is shaken while being immersed in the cleaning liquid.