JP2003103203A - Two-fluid-spraying nozzle, granulation apparatus and granulation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-fluid-spraying nozzle of which sections to be brought into contact with a liquid and gas passing sections can be efficiently washed and reliably steam-disinfected by taking out the nozzle from an apparatus main body, with no need of disassembling a two-fluid-spraying nozzle main body itself. SOLUTION: The two-fluid-spraying nozzle comprises the first flow path 103 for introducing the first fluid (a liquid-state material) into a tip end opened part 100a and the second flow path 104 for introducing the second fluid (compressed air) into the tip end opened part 100a. Further, a fluid finely granulation flow pass is formed in a manner that it can move between the first position and the second position of the first flow path 103 and the second flow path 104 and is provided with an aperture with a diameter necessary to spray respective fluids led from the first flow path 103 and the second flow path 104 and a flow path forming member 106 for forming an opened path having an aperture with a diameter larger than that of the fluid finely granulating path is formed at the second position.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention particularly performs washing and sterilization in the field of atomizing a liquid, that is, in a wide range of fields such as spray drying, fluidized bed coating / granulation, jet cooling, and humidity control. The present invention relates to a required two-fluid spray nozzle that is preferably used in a pharmaceutical manufacturing apparatus, a food manufacturing apparatus, a granulating apparatus including the two-fluid spray nozzle, and a granulating system.

[0002]

2. Description of the Related Art Conventionally, a granulating apparatus sprays various materials into the inside of a granulating chamber to produce granular or granular products made of the materials.

For example, in the granulating apparatus disclosed in Japanese Unexamined Patent Publication No. 2000-31817, a liquid material is sprayed into the inside of the granulating chamber by a spray nozzle, and particles formed by drying inside the granulating chamber are formed. The fluidized bed provided in the lower part of the granulation chamber receives the particles and further sprays a liquid material on the particles to granulate the particles. An air supply unit is provided at the bottom of the fluidized bed, and the particles are made to dry and solidify while being made to flow by the flowing air supplied from the air supply unit. By using the granulating apparatus, particles whose size is controlled to some extent can be manufactured.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The granulating apparatus disclosed in the above publication is used for cleaning a pharmaceutical manufacturing apparatus, a food manufacturing apparatus, etc.
When used in a device that requires sterilization, it is necessary to thoroughly wash and sterilize not only the inside of the granulation chamber but also the spray nozzle after granulation.

By the way, in the granulating apparatus disclosed in the above publication, a two-fluid spray nozzle for mixing liquid and gas at high speed is used as the spray nozzle for the purpose of atomizing the liquid. In this case, the smallest opening (orifice) in each of the liquid and gas channels has a circle equivalent diameter of φ.
It is about 0.4 to 2.6 mm. This orifice part is for spraying a fluid.

As described above, since the two-fluid spray nozzle has an orifice portion having a very small diameter for spraying, each of the two fluid spray nozzles is used for the purpose of wet heat sterilization (high pressure steam sterilization) operation generally applied as a sterilization method. Even if an attempt is made to pass saturated steam (or aseptic steam) in the flow path and maintain the flow path at 121 ° C., which is a sterilization condition, the steam flow rate becomes insufficient and steam drain occurs, This causes a decrease in temperature, which causes a problem that the inside of the channel cannot be sterilized sufficiently.

Further, if the orifice portion of the flow path is small as described above, the flow rate of the cleaning liquid at the time of cleaning becomes small, the flow rate of the cleaning liquid in the flow path decreases, and the cleaning effect also deteriorates.

From these facts, when the granulating apparatus disclosed in the above-mentioned publication is used in a pharmaceutical manufacturing apparatus or a food manufacturing apparatus which requires sterilization, conventionally, the two-fluid spray nozzle is removed from the apparatus main body and disassembled. Then, the method of washing and sterilizing has been adopted.

However, if the two-fluid spray nozzle is detached from the main body of the apparatus and disassembled for cleaning and sterilization each time cleaning and sterilization are performed, there is a problem that the efficiency becomes extremely low.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to remove a part from the apparatus main body and disassemble the two-fluid spray nozzle main body itself, and a portion in contact with a liquid or a gas passage portion. (EN) Provided are a two-fluid spray nozzle capable of efficiently cleaning and efficiently sterilizing with steam, and a granulating apparatus and a granulating system equipped with the two-fluid spray nozzle.

[0011]

In order to solve the above-mentioned problems, a two-fluid spray nozzle according to the invention of claim 1
In a two-fluid spray nozzle that mixes two types of fluid and sprays from the tip opening, a first flow path for guiding one fluid to the tip opening and a second flow path for guiding the other fluid to the tip opening. A second flow path is provided, and further the first flow path is provided.
A first outlet for discharging the fluid from the flow path to the tip opening and a second outlet for discharging the fluid from the second flow path to the tip opening are provided from the respective outlets when spraying each fluid. It is characterized in that a discharge opening area adjusting means for adjusting the discharge opening area is provided so as to be larger.

According to the above construction, the discharge opening area adjusting means allows the discharge opening area for discharging the fluid guided from each flow path to the tip opening portion at the time of cleaning and sterilizing to be a material spraying time (hereinafter, simply referred to as a spraying time). The flow rate of the fluid passing through each discharge port can be made larger than that during spraying.

With this arrangement, when the discharge opening area is increased, for example, when steam (water vapor) is circulated in each flow path, steam drain does not occur on the wall surface of the flow path, so the steam supply port in the flow path is It is possible to maintain the steam temperature from the end to the opening of the two-fluid spray nozzle, and the temperature required for sterilization (for example, 1
21 ° C.) can be stably maintained for the required time (20 minutes).

As described above, according to the two-fluid spray nozzle having the above-mentioned structure, since it can be sterilized by the wet heat sterilization (high pressure steam sterilization) operation generally applied as a sterilization method, the sterilization treatment can be performed without disassembling the nozzle. it can.

Further, the discharge opening area adjusting means adjusts the discharge opening area for discharging the fluid guided from each flow path to the tip opening so as to be larger than that at the time of spraying. The decrease in the flow velocity of the fluid from the inlet to the tip opening can be made smaller than that during spraying.

Thus, the flow rate of the cleaning liquid in the channel can be maintained at a desired value, so that the cleaning liquid can flow from the fluid inlet of the channel to the tip opening at the flow rate required for cleaning. For example, the average liquid velocity in the channel is 1 to 3 m /
A turbulent flow can be obtained with s.

As described above, according to the above-mentioned two-fluid spray nozzle, since the flow velocity required for cleaning the flow passage can be maintained from the fluid inlet of the flow passage to the tip opening portion, the flow passage is efficiently washed. can do.

In order to solve the above-mentioned problems, a two-fluid spray nozzle according to a second aspect of the present invention is a two-fluid spray nozzle in which two kinds of fluids are mixed and sprayed from a tip opening portion. First for guiding to the tip opening
An inner pipe forming a flow passage, an outer pipe provided on the outer peripheral surface side of the inner pipe and forming a second flow passage for guiding the other fluid to the tip opening, Between the first position and the second position, it is provided so as to be relatively movable with respect to the inner pipe and the outer pipe, and for spraying the respective fluids guided from the inner pipe and the outer pipe at the first position. While forming a fluid atomization channel having an opening of the required diameter,
The second position is characterized in that a flow path forming member forming an open flow path having an opening having a diameter larger than that of the fluid atomization flow path is provided.

Here, the flow passage forming member being movable relative to the inner pipe and the outer pipe means that the flow passage forming member moves relative to the fixed inner pipe and outer pipe, and the fixed flow passage. It includes a configuration in which the inner tube and the outer tube move with respect to the forming member, and a configuration in which both move together.

According to the above construction, when the flow passage forming member is moved to the second position relative to the outer pipe and the inner pipe when not spraying, the diameter of the fluid atomization flow passage is larger than that of the fluid atomization flow passage. Since the opening channel having the opening is formed, the flow rate of the fluid discharged from each outlet of the outer tube and the inner tube is made larger than that in the case where the fluid is flown in the fluid atomization channel. be able to.

As a result, for example, when steam is circulated in each flow path, it becomes possible to maintain the steam temperature from the steam supply port in the flow path to the tip opening of the two-fluid spray nozzle. Inside, the temperature required for sterilization (for example, 121 ° C.) can be stably maintained for the required time (20 minutes).

As described above, according to the two-fluid spray nozzle having the above-mentioned structure, since it can be sterilized by the wet heat sterilization (high pressure steam sterilization) operation generally applied as a sterilization method, the sterilization treatment can be performed without disassembling the nozzle. it can.

If the flow path forming member is relatively moved to the second position with respect to the outer tube and the inner tube when not spraying,
Since an opening channel having an opening with a diameter larger than that of the fluid atomization channel is formed, a decrease in the flow velocity of the fluid from the fluid inlet to the tip opening is reduced by the fluid atomization channel in each channel. Can be smaller.

Thus, the flow rate of the cleaning liquid in the channel can be maintained, so that the cleaning liquid can flow from the fluid inlet of the channel to the tip opening at the flow rate required for cleaning.

As described above, according to the above-mentioned two-fluid spray nozzle, since the flow velocity required for cleaning the flow passage can be maintained from the fluid inlet of the flow passage to the tip opening portion, the flow passage can be efficiently washed. can do.

The flow path forming member and each flow path (fluid atomization flow path and opening flow path) may be configured as follows.

That is, as described in claim 3, the flow path forming member includes a first forming member forming a discharge port for the fluid introduced from the inner pipe, and a discharge port for the fluid introduced from the outer pipe. And a second forming member that forms a fluid-atomization flow path when the flow path forming member relatively moves to the first position and the first forming member is in close contact with the inner pipe. At the same time, a fluid atomization flow path is formed between the second forming member and the outer tube, and the flow path forming member is the second flow path forming member.
When the second forming member moves relatively to the position, the first forming member separates from the inner pipe to form an opening channel, and
An open channel may be formed between the forming member and the outer tube.

As means for moving the flow path forming member, a bellows or a diaphragm valve is preferably used as described in claim 4 or 5.

In particular, the bellows is not wound around a column or a rod of a piston mechanism like a spring,
Since it can be installed so as to cover the support column or rod and to completely separate the periphery of the bellows from the drive section of the bellows, cleaning can be performed without mixing external bacteria and dirt into the inner and outer tubes. -Suitable for use in equipment that requires sterilization.

The above-mentioned two-fluid spray nozzle may be used in a granulating apparatus and a granulating system as shown below.

That is, the granulating apparatus according to the invention of claim 6 sprays two kinds of fluid into the granulating chamber for producing target particles from the two kinds of fluid sprayed inside. In a granulating device provided with a two-fluid spray nozzle for supplying, the two-fluid spray nozzle according to any one of claims 1 to 5 is used as the two-fluid spray nozzle.

According to the above construction, the granulating apparatus of the present invention uses the two-fluid spray nozzle which can be efficiently washed and can be surely sterilized.
It is suitable for applications that require sterilization, such as the production of food and foodstuffs.

The granulating system according to the invention of claim 7 is the granulating apparatus according to claim 6, and the first fluid supply for supplying the first fluid to the two-fluid spray nozzle provided in the granulating apparatus. An apparatus, a second fluid supply device that supplies a second fluid to the two-fluid spray nozzle, and a first cleaning device that supplies at least one of a cleaning liquid and steam to a first flow path in the two-fluid spray nozzle. The second flow path in the two-fluid spray nozzle is provided with a second cleaning device that supplies at least one of cleaning liquid and steam, and a third cleaning device that supplies at least one of cleaning liquid and steam to the granulating device. It is characterized by that.

Since the granulating system having the above structure has the granulating apparatus according to claim 6, that is, the two-fluid spray nozzle according to any one of claims 1 to 5, it can be used for medicines, medicinal materials, It is suitable for applications that require sterilization, such as the production of food and foodstuffs.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION The following will describe one embodiment of the present invention.

The granulating system according to this embodiment is shown in FIG.
As shown in FIG. 4, the raw material supply unit 2 (first fluid supply device), compressed air supply unit 3 (second fluid supply device), flowing air supply unit 4, exhaust unit 5, 1 wash
Sterilization unit 6 (third cleaning device), second cleaning / sterilization unit 7 (third cleaning device)
A cleaning device), a third cleaning / sterilization unit 8 (first cleaning device), and a fourth cleaning / sterilization unit 9 (second cleaning device) are arranged.

The granulating apparatus 1 is provided with a substantially cylindrical granulating chamber 200 having a two-fluid spray nozzle 100 at the bottom thereof.

The two-fluid spray nozzle 100 mixes the liquid material 20 (first fluid) from the raw material supply section 2 and the compressed air (second fluid) from the compressed air supply section 3 to open the tip. It sprays from the part 100a into the granulation chamber 200.

The granulation chamber 200 has an opening 200a at the bottom for taking in the flowing air supplied from the flowing air supply unit 4, and the liquid such as water accumulated in the granulating chamber 200 is drained. And an opening 200c for discharging the air in the granulation chamber 200 to the external exhaust part 5 is formed in the upper part.

In the granulating apparatus 1 having the above structure, the flowing air is blown upward from the flowing air supply unit 4 into the granulating chamber 200, and the liquid material 20 is caused to flow from the two-fluid spray nozzle 100. Similarly, it is sprayed upward in the air for use, and while the fine particles of the sprayed liquid material 20 are suspended inside the granulation chamber 200, the water content of the liquid material 20 is evaporated and granulated. At this time, the fine particles are the liquid material 20 sprayed from the two-fluid spray nozzle 100.
It is intermittently coated and grows. By repeating such a process, particles having a predetermined particle size are manufactured.

In the granulation system having the above-mentioned structure, although not shown, in order to optimize the temperature of the liquid material 20 to be sprayed and supplied into the granulation chamber 200, the outer peripheral portion of the two-fluid spray nozzle 100 is A jacket is provided over almost the entire surface to allow the fluid to flow. By heating or cooling the two-fluid spray nozzle 100 by circulating a temperature control medium in the jacket, the temperature and viscosity of the liquid material 20 to be sprayed are optimized, and the particle diameter of the sprayed liquid material 20 is made uniform. To do. As a result, the degree of aggregation and growth of the sprayed liquid material 20 can be made uniform, and product particles having a narrow particle size distribution can be obtained.

Further, in the granulating apparatus having the above structure, as shown in FIG. 2, in order to prevent particles or the like in the middle of granulation from being discharged from the opening 200b serving as an air discharge port, the filter is used. 201 and the filter 20
A removing means for removing particles adhered to No. 1 and a pressure applying means for instantaneously increasing the internal pressure of the granulation chamber 200 are added.

By providing the filter 201,
Since the discharge of particles can be prevented, the volume of the granulation chamber 200 can be configured to be relatively small, and by providing the pressure applying means, particles in the middle of granulation can be compacted to form heavy product particles. Obtainable.

The individual members constituting the granulating system having the above construction will be described below.

The raw material supply section 2 is, as shown in FIG.
It is composed of a container 21 containing the liquid material 20 and a pump 22 for pushing out the liquid material 20 contained in the container 21 by air pressure. The liquid material 20 from the raw material supply unit 2 is supplied to the two-fluid spray nozzle 100 via a switching valve 10 that switches a common flow path with a third cleaning / sterilization unit 8 described later.

The compressed air supply unit 3 is provided with a compressor 31 and compresses the air taken in from the outside and supplies it to the two-fluid spray nozzle 100 via the switching valve 12. The compression condition at this time is 0.4MP
a, 100 NL / min.

In the two-fluid spray nozzle 100, the liquid material 20 supplied from the raw material supply section 2
The compressed air supplied from the compressed air supply unit 3 is introduced into a separate flow path, and finally mixed to be mixed with the tip opening 1.
It is designed to be sprayed from 00a. Details of the two-fluid spray nozzle 100 will be described later.

The flow air supply unit 4 supplies the flow air whose temperature is set to a predetermined temperature and humidity to the opening 200a.
The powder is supplied upward to the granulation chamber 200 via. The temperature / humidity mainly depends on the inner wall 20 of the granulation chamber 200.
Measurement is performed using a thermometer / hygrometer (not shown) provided at 0d.

The flow air supply unit 4 includes a blower 41 for taking in air from the outside, an air tank 42 for storing the air taken in by the blower 41, and a dryer 43 for drying the air stored in the air tank 42. , A heater 44 for heating the air dried by the dryer 43 to a predetermined temperature. That is, the dryer 43 adjusts the humidity of the air and the heater 44 adjusts the temperature of the air, so that the air having a predetermined temperature and humidity is supplied to the granulation chamber 200.

The pressure of the flowing air is preferably such that individual particles flow inside the granulation chamber 200.
In the present embodiment, an example is shown in which the particles are grown inside the granulation chamber 200 only by spraying the liquid material 20, for example, but in that case, the particles do not aggregate at the initial stage of granulation. Adjust the flow rate of the flow air. Further, the temperature and humidity of the flowing air are such that when the particles are slowly dried, aggregation of the particles is likely to occur and the particle size distribution of the obtained particles is widened. Adjust accordingly.

The flow air is blown out generally upward, but the direction may be blown upward in the vertical direction, or it may be blown obliquely upward so that the granulating chamber 200 is blown upward. A swirling flow of flowing air may be formed inside. When the swirl flow is formed, the particles are more positively wound upward, so that the dry solidification of the particles can be further promoted.

The exhaust unit 5 is provided with an exhaust device 51 for exhausting air during or after granulation in the granulation chamber 200.

Granulation can be performed in the granulating apparatus 1 by using the above-mentioned raw material supply unit 2, compressed air supply unit 3, flowing air supply unit 4, and exhaust unit 5.

On the other hand, after granulation, the inner wall 2 of the granulation chamber 200
00d or the filter 201 has a residue attached thereto. Moreover, when the granulating apparatus 1 is used in a pharmaceutical manufacturing apparatus or a food manufacturing apparatus, it is necessary to perform sterilization treatment in addition to washing.

Therefore, on the surface of the granulation chamber 200, at least one of the cleaning liquid and steam (steam) is formed.
Injecting holes 202 and 203 for introduction into the inside of the granulation chamber 00 are formed, and a cleaning nozzle 204 for cleaning and sterilizing the filter 201 is provided above the inside of the granulation chamber 200. The injection hole 202 is used in the granulation chamber 200.
The inner wall 200d is used mainly for cleaning and sterilization, and the injection hole 204 is used for cleaning and sterilization centering on the filter 201 in the granulation chamber 200.
Is used to clean and sterilize the entire inner surface of the filter (201) and the upper part of the filtration (air) inside the granulation chamber 200.

The injection holes 202 and 203 are used for the second cleaning and
The cleaning nozzle 204 is connected to the sterilization unit 7, and the cleaning nozzle 204 is connected to the first cleaning / sterilization unit 6.

The first cleaning / sterilization unit 6 is made up of PS (pure s
steam supply unit 61 for supplying a team) and PW (pure water)
It is composed of a pure water supply unit 62 for supplying N2 and a clean air supply unit 63 for supplying N2 (clean air). The second cleaning / sterilization unit 7 has basically the same configuration as the first cleaning / sterilization unit 6, and includes a steam supply unit 71 and a pure water supply unit 72.
And a clean air supply unit 73. Nitrogen may be used in place of N2 (clean air), and a cleaning liquid may be used in place of PW.

The third cleaning / sterilizing unit 8 is connected to the first inlet 100b of the two-fluid spray nozzle 100 via the switching valve 10 and the liquid material 20 in the two-fluid spray nozzle 100 after granulation. The channel (first channel) is cleaned and sterilized.

Further, like the third cleaning / sterilizing unit 8, the fourth cleaning / sterilizing unit 9 is connected to the second inlet 100c of the two-fluid spray nozzle 100 via the switching valve 12 for granulation. The compressed air flow path (second flow path) in the subsequent two-fluid spray nozzle 100 is cleaned and sterilized.

Details of the cleaning and sterilization of the two-fluid spray nozzle 100 will be described later.

Further, the third cleaning / sterilizing section 8 and the fourth
The cleaning / sterilization unit 9 also has the same configuration as the first cleaning / sterilization unit 6 and the second cleaning / sterilization unit 7, and the steam supply units 81 and 91.
A pure water supply unit 82, 92, a clean air supply unit 83,
And 93.

As described above, if the first cleaning / sterilizing unit 6, the second cleaning / sterilizing unit 7, the third cleaning / sterilizing unit 8 and the fourth cleaning / sterilizing unit 9 have the same configuration, they may not be provided separately. Without
You may make it common. By doing so, it is possible to save the space of the entire granulation system, control of each supply unit in each cleaning / sterilization unit can be unified, and complicated operations can be reduced.

Here, the above-mentioned two-fluid spray nozzle 100
Will be described below.

As shown in FIG. 1, the two-fluid spray nozzle 100 has a double casing structure in which a first flow path 103 is formed in an inner casing 101 which is an inner pipe, and the inner casing 101 and the outer pipe are The second flow path 104 is formed between the outer casing 102 and the outer casing 102.

The liquid material 20 or at least one of the cleaning agent (cleaning liquid) and steam is introduced into the first flow path 103 through the first inlet 100b provided below.

On the other hand, compressed air or at least one of a cleaning agent (cleaning liquid) and steam is introduced into the second flow path 104 from a second inlet 100c provided below.

Tip portion 101 of the inner casing 101
a has a tapered shape that is inclined inward toward the tip. As a result, the diameter of the first flow path 103 is gradually reduced at the tip portion 101a.

The tip portion 102a of the outer casing 102 is also tapered so as to be inclined at substantially the same inclination angle as the tip portion 101a of the inner casing 101.
As a result, the diameter of the second flow path 104 is also reduced to the tip portion 102.
It becomes gradually smaller at a.

First channel 1 in the inner casing 101
03 is provided with a rod 105 that vertically penetrates the first flow path 103. At the tip of this rod 105, a flow path forming member 106 is provided as a discharge opening area adjusting means for adjusting the opening area of the discharge port of the fluid sent from the first flow path 103 and the second flow path 104. .

The flow path forming member 106 is the first flow path 10
First adjusting member (first forming member) 106a that adjusts the size of the discharge port of the fluid sent from No. 3, and the second adjusting member (the first adjusting member that adjusts the size of the discharge port of the fluid sent from the second flow path 104 ( Second forming member) 106b.

The first adjusting member 106a has the same shape as the tip portion 101a of the inner casing 101, that is, a tapered shape, and a plurality of slits 107 are formed on the surface thereof along the vertical direction of the tapered surface. ing. Then, the first adjusting member 106a is the casing 1
When the state of being hooked by the tip portion 101a of 01, that is, the state shown in FIG.
The liquid material (liquid) sent from the inside of 03 is the first adjusting member 1
The fluid atomizing flow path formed by the slit 106a formed on the surface of the inner surface of the inner casing 101 and the slit 106a is ejected toward the tip opening 100a of the two-fluid spray nozzle 100.

The second adjusting member 106b of the flow path forming member 106 is provided on the extension of the rod 105.
When the fluid is sprayed from the second flow path 104, the tip surface 108 is formed so as to project from 6a, and the tip surface 108 is the two-fluid spray nozzle 1.
00 is formed so as to be flush with the apex of the front end opening portion 100a of 00 to form a fluid atomization flow path with the front end portion of the outer casing 102. For example, in FIG.
As shown in (a), during spraying, the diameter of the rod 105,
That is, when the diameter of the second adjusting member 106b is φ5 mm,
The diameter of the tip opening portion 100a is preferably φ5.3 mm.

Below the rod 105, an air piston 11 for moving the rod 105 downward is provided as shown in FIG. The flow path forming member 1
06 is a state in which the first adjusting member 106a is inscribed in the front end portion 101a of the inner casing 101, as shown in FIG.
That is, the bellows 109 as an elastic member is attached to the rod 105 so as to be maintained in a fluid spray state.

That is, the rod 105 is composed of the bellows 109.
Therefore, when the air piston 11 is driven, the rod 105 is moved downward against the urging force of the bellows 109. That is, the bellows 109 functions as a driving unit that returns the flow path forming member 106 to the upper direction via the rod 105.

In addition to the bellows 109, a diaphragm valve may be used.

In the state in which the rod 105 is moved downward, as shown in FIG. 3B, the tip end portion 101a of the inner casing 101 and the first adjusting member 1 of the flow path forming member 106.
The state of being hooked with 06a is released, and the tip surface 108 of the second adjusting member 106b becomes lower than the tip opening portion 100a formed in the upper portion of the tip portion 102a of the outer casing 102.

That is, as shown in FIG. 3B, as the flow path forming member 106 moves downward,
When moving downward, compared to the case shown in FIG.
The discharge opening area of the fluid in the first channel 103 and the second channel 104
The discharge opening area of the fluid is large.

As described above, the flow path forming member 106, the rod 105, the bellows 109, and the air piston 11 constitute a discharge opening area adjusting means for adjusting the discharge opening area of the discharge port.

However, for the two-fluid spray nozzle of the present invention, it is not important to move the flow path forming member 106 up and down, and the respective discharge opening areas of the first flow path 103 and the second flow path 104 are made larger than during spraying. It is important to. Therefore, the first channel 103 and the second channel 104
If each discharge opening area of is larger than when spraying,
An inner casing 101 and an outer casing 102,
A configuration in which either the flow path forming member 106 moves relatively is included in the technical scope of the present invention.

As shown in FIG. 3B, the first flow path 103
If the discharge opening area of the fluid and the discharge opening area of the fluid of the second flow path 104 are increased, for example, high-temperature steam is first added.
Even if it flows through the flow path 103 or the second flow path 104, it can be discharged from the front end opening portion 100a without lowering the temperature. That is, the flow path forming member 10 is provided at the position shown in FIG.
If 6 is arranged, the first flow path 103 and the second flow path 10
The cleaning and sterilization of 4 can be reliably performed.

As described above, the flow path forming member 106 is formed.
Is movably provided in the two-fluid spray nozzle 100 between a first position and a second position. That is, as shown in FIG. 3A, the first position means that the first adjustment member 106a is the inner casing 1 during spraying.
The flow path forming member 1 so as to be inscribed in the front end portion 101a of 01.
06 indicates the position where the second position is arranged, and the second position is the position shown in FIG.
As shown in (b), the position where the flow path forming member 106 is arranged so that the first adjusting member 106a is detached downward from the tip portion 101a during cleaning / sterilization is shown.

The first position is the inner casing 10
1 and the shape of the flow path forming member 106,
At the second position, the flow path forming member 106 descends and each flow path 1
The diameter of the discharge opening of 03.104 is not particularly limited as long as it is a position where it can be surely washed and sterilized.

By the way, when the granulation system having the above structure is applied to a pharmaceutical manufacturing apparatus, in addition to a large volume of infusion solution and a small volume of antibiotics for injection, hormone preparations, protein preparations, enzymes, vaccines, serum A liquid pharmaceutical raw material, such as a physiologically active substance, which needs to be dried in a conventionally freeze-dried aseptic environment is supplied as the liquid material 20 to the first channel 103 of the two-fluid spray nozzle 100.

When the granulation system having the above-mentioned structure is applied to a food production apparatus, the liquid material 20 necessary for producing food additives, health foods, etc. is supplied with the two-fluid spray nozzle 10.
It is adapted to be supplied to the first channel 103 of 0.

Usually, in the granulating system having the above structure,
After the granulation, it is necessary to clean and sterilize the two-fluid spray nozzle 100 and the granulation chamber 200 of the granulator 1.

Here, as shown in FIG. 2, the first cleaning /
By the sterilization unit 6 and the second cleaning / sterilization unit 7, the injection hole 2
By supplying a cleaning liquid or steam into the granulation chamber 200 through 02 and 203 and the cleaning nozzle 204, the raw material adhering to the filter 201 is removed and cleaning and sterilization are performed, and further the cleaning and sterilization of the granulation chamber 200 is performed. I do.

Furthermore, the third cleaning / sterilizing unit 8 and the fourth cleaning / sterilizing unit 9 clean and sterilize the two-fluid spray nozzle 100.

For example, the above-mentioned two-fluid spray nozzle 100
In FIG. 3B, as shown in FIG.
When 6 is moved downward, that is, when the discharge opening area of each fluid is larger than during spraying, the flow paths are switched by the switching valves 10 and 12,
The cleaning liquid or steam from the third cleaning / sterilization unit 8 is supplied into the first flow path 103, while the cleaning liquid or steam from the fourth cleaning / sterilization unit 9 is supplied into the second flow path 104.

Here, the temperature rise in the nozzle during the sterilization operation in the two-fluid spray nozzle having the above-mentioned structure (this application) and the temperature rise in the nozzle in the conventional spray nozzle (conventional)
The results of comparison between and are shown in FIG. The sterilization operation was held at 121 ° C. for 20 minutes. According to this sterilization condition, the lethality probability of thermostable spores can be set to a level of 10 ⁻⁶ .

First, 121 ° C. saturated steam (steam) was supplied to each nozzle of the present invention and the conventional nozzle, and the temperature rise of the nozzle outer peripheral wall at this time was measured. Here, in the period A (preparation period) of 0.5 minutes from the start of steam supply, since the steam is supplied while the cleaning liquid still remains in the nozzle, the temperature in the nozzle is not stable, In the B period (temperature rising period) of the next 1 minute, it can be seen that the cleaning liquid in the nozzle is exhausted and the temperature is raised by steam. Then, in the next 20-minute C period (holding period), steam is stably supplied and the nozzle sterilization process is performed.

From the graph shown in FIG. 4, it can be seen from the conventional nozzle that the liquid outlet, that is, the tip opening is narrow (φ0.4 mm).
When the temperature exceeded 100 ° C, steam mixed with water due to dew condensation was ejected from the nozzle outlet, and steam drain was clearly generated inside the nozzle, and the temperature could not be raised to the predetermined 121 ° C. It is considered that this is because the steam flow resistance was increased due to the outlet diameter being too small, and the heat released from the nozzle to the outside was higher than the heat input from the steam to the nozzle.

On the other hand, in the two-fluid spray nozzle of the present application, as shown in FIG.
Is moved downward, the fluid outlets of the first channel 103 and the second channel 104 in the tip opening 100a are sufficiently large, and for example, a sufficient steam outlet (diameter φ
5 mm) was formed, it was confirmed that there was no steam drain formation and the temperature was smoothly raised to 121 ° C., and then it was maintained at a constant temperature.

Next, with respect to the cleaning effect of the nozzle with the cleaning water, the results of comparison between the nozzle of the present application and the commercially available nozzle are shown below.

In the commercially available nozzle used, the diameter of the liquid supply pipe portion was φ4 mm, and the leading end portion (liquid outlet diameter) was φ.
It is 0.97 mm. Without disassembling this nozzle, wash water of 3 kgf / cm ² from the liquid supply pipe to the most distal end.
When it is supplied at a water pressure of 0, the flow rate is 0.
It became 8 L / min. Here, the diameter of the tip is φ0.
Since it is 97 mm, the liquid flow velocity is about 18 m / s, but the average velocity of 0.68 m / s in the liquid supply pipe, and the flow velocity of 1 to 3 m / s or more required for cleaning the inner wall of the pipe. It can be seen that the cleaning effect is insufficient.

On the other hand, in the two-fluid spray nozzle of the present application, as shown in FIG.
Is moved downward, the fluid outlets of the first channel 103 and the second channel 104 in the tip opening 100a are sufficiently large, and a liquid outlet of φ5.3 mm in terms of diameter is formed. Become. The liquid supply pipe opening is φ6m.
Since m is m, when the washing water is supplied under the same conditions as in the case of the above-mentioned commercially available nozzle, it becomes 28 L / min. Here, the tip portion has a flow velocity of 21 m / s, and the liquid supply pipe opening has a flow velocity of 16 m / s. In this way, it is clear that the cleaning effect can be sufficiently obtained, since it is much higher than 1 to 3 m / s required for cleaning the deposits on the inner wall of the pipe.

As described above, the flow velocity required for cleaning the deposits on the inner wall of the pipe is 1 to 3 m / s, so a flow velocity higher than this can be obtained. Therefore, the above 3k
A large water pressure such as gf / cm ² is not required, and a sufficient cleaning effect can be obtained with a lower water pressure.

Further, although the above description has been made with respect to the liquid flow section, that is, the first flow path 103, the second flow section which is the air flow section.
Also in the flow path 104, since the air outlet which is a fluid becomes large at the time of cleaning / sterilization, the same cleaning effect can be obtained.

As described above, since the two-fluid spray nozzle of the present invention is sterilized by steam, it is processed by using a material having corrosion resistance capable of preventing the corrosive action of steam, or the corrosion resistance is improved. It is necessary to process the steam contact surface to have

For example, each surface of the inner casing 101, the outer casing 102, the rod 105, and the flow path forming member 106 is buffed and then electropolished to form a passivity. This can prevent corrosion due to steam.

In addition to processing the surface as described above,
Even if the inner casing 101, the outer casing 102, the rod 105, and the flow path forming member 106 are made of a corrosion-resistant material such as stainless SUS316L or Hastelloy, corrosion due to steam can be prevented.

In this embodiment, as shown in FIGS. 3A and 3B, an example in which the first adjusting member 106a having a plurality of slits 107 formed on the surface thereof is used as the flow path forming member 106 is shown. However, the present invention is not limited to this, and any structure may be used as long as the fluid atomization flow path is formed in the hooked state at the tip portion 101a of the inner casing 101.

For example, as shown in FIGS.
Instead of forming a slit on the surface like the first adjusting member 106a, a flow path forming member having a first adjusting member 301 in which a plurality of fine pores 301a are formed as fluid atomizing flow paths inside. 300 (FIG. 5B) may be used. The outer peripheral surface of the first adjusting member 301 is a tapered surface, a part or all of which is in close contact with the inner wall surface of the front end portion 101 a of the inner casing 101. Here, FIG.
In FIG. 3C, the flow path forming member 10 shown in FIGS.
6 is changed to the flow path forming member 300, and other configurations are basically the same.

Also in this case, the first adjusting member 301 is
The rod 105 is attached to the rod 105, and when the rod 105 is moved downward, the rod 105 moves downward as shown in FIG. Can be larger than when sprayed,
The same effect as that of the flow path forming member 106 shown in FIGS.

In the example showing the above two two-fluid spray nozzles, only the rod 105 is driven to adjust the discharge opening area of each flow path, but the present invention is not limited to this, and, for example, a rod and The discharge opening area of each flow path may be adjusted by driving the outer tube. For this example,
This will be described below with reference to FIGS. 6 and 7.

As shown in FIG. 6, the two-fluid spray nozzle 400 includes an inner casing 401 forming an inner pipe, an outer casing 402 forming an outer pipe, a rod 500 penetrating the inside casing 401, and an outer casing. It is composed of a bellows 600 and a cylinder 601 which constitute a driving means for driving the casing 402. The rod 500 is also vertically driven by a cylinder (not shown) like the bellows 600.

The tip portion 500a of the rod 500 has a substantially conical shape, and four concave portions 5 are formed on the surface 500b.
00c are formed at equal intervals along the circumferential direction. The tip portion 500a has a larger inclination angle below the surface 500b than the other, and the inner casing 401
There is formed a hooking portion 500d (see FIG. 7) that contacts the inner surface of the rod 500 and locks the upward movement of the rod 500.

The inner casing 401 forms a first flow path 403 between the rod 500 and the liquid material, which is the first fluid.

Tip portion 401 of the inner casing 401
a is inclined at substantially the same angle as the inclination angle of the tip portion 500a of the rod 500, and when the liquid material is ejected, the hook portion 500 below the tip portion 500a is a.
It is formed so as to come into contact with d and to stop the upward movement of the rod 500.

The tip portion 401 of the inner casing 401
a and the hook 500 on the surface 500b of the rod 500
In the state in which d is locked, that is, in the state shown in FIG. 6 (hereinafter, referred to as a spray state), the tip portion 401a and the surface 5
The first discharge port 403a for ejecting the liquid material from the first flow path 403 is formed between the concave portion 500c and the concave portion 500c of 00b. In this state, the first outlet 403
The a is formed by the number of the concave portions 500c (here, four). That is, the four first discharge ports 403a form a fluid atomization flow path necessary for spraying the liquid material that is the first fluid.

Therefore, in the spraying state shown in FIG. 6, the liquid material sent from the first flow path 403 is ejected from the four first discharge ports 403a to the tip opening portion 400a of the two-fluid spray nozzle 400, and the second material is discharged. It is mixed with compressed air that is a fluid and atomized.

The compressed air is supplied to the inner casing 4
01 and the outer casing 402 through a second flow path 404 formed between the inner casing 401 and the inner casing 401.
The second discharge port 404a formed between a and the tip portion 402a of the outer casing 402 ejects to the tip opening portion 400a of the two-fluid spray nozzle 400.

Here, the tip portion 402a of the outer casing 402 is such that the inner surface thereof is the tip portion 4 of the inner casing 401.
In the sprayed state shown in FIG. 6, the tip end portion 402a of the outer casing 402 is hooked on the tip end portion 401a of the inner casing 401 in a state of being inclined along the outer surface shape of 01a.

Tip portion 402 of the outer casing 402
When the a and the front end portion 401a of the inner casing 401 are in the hooked state, a second discharge port 404a for ejecting compressed air from the second flow path 404 is formed in the hooked portion. In this case, the tip portion 500 of the rod 500 described above
As in the relationship between a and the tip portion 401a of the inner casing 401, a predetermined number of concave portions (not shown) are formed on the surface of the tip portion 401a of the inner casing 401 on the outer casing 402 side.
Forming an outer casing 402 and an inner casing 40.
The second outlet 404a may be formed between the outer casing 402 and the outer casing 402, or a predetermined number of recesses (not shown) may be formed on the surface of the tip end portion 402a of the outer casing 402 on the inner casing 401 side. The second outlet 404a may be formed between the inner casing 401 and the inner casing 401.

Even if the first discharge port 403a and the second discharge port 404a are not formed by the above-described forming method, the sprayed state shown in FIG. 6, that is, the inner casing of the tip portion 500a of the rod 500 is formed. 401 tip portion 401a
If a fluid atomization flow path that allows each fluid to be sprayed can be formed in the state where the tip portion 402a of the outer casing 402 is in contact with the tip portion 401a of the inner casing 401, Any forming method may be used.

The outer casing 402 has a bellows 600 formed below, and is in a state of being urged downward by the bellows 600 in a spray state as shown in FIG. A cylinder 601 provided on the outer peripheral surface can move upward against the urging force of the bellows 600. In addition, as a means for driving the outer casing 402,
In addition to the bellows 600, a diaphragm valve may be used.

When the outer casing 402 is moved upward by the bellows 600, the movement is interlocked with this movement.
The rod 500 is moved downward by a cylinder (not shown).

FIG. 7 shows a state in which the outer casing 402 has moved upward and the rod 500 has moved downward as described above. In this state, the discharge opening areas of the first discharge port 403a and the second discharge port 404a are larger than in the sprayed state shown in FIG. This state is called a washing / sterilization state. That is, the first discharge port 403a and the second discharge port 404a have a discharge opening area that forms a fluid atomization channel in the spray state shown in FIG. 6, and the above-mentioned fluid in the cleaning / sterilization state shown in FIG. The movement of the outer casing 402 and the rod 500 is adjusted so that the discharge opening area is larger than that of the atomization channel.

First outlet 4 in the above-mentioned washed and sterilized state
The respective discharge opening areas of 03a and the second discharge port 404a are not particularly limited as long as they are large enough to wash and sterilize the respective flow paths of the first flow path 403 and the second flow path 404. . That is, the first in the cleaning / sterilization state
The respective discharge opening areas of the discharge port 403a and the second discharge port 404a may be set so that the cleaning level and sterilization level required for each flow path can be achieved.

In the two-fluid spray nozzle 400 having the above structure, the outer casing 402 and the rod 500 are moved to switch between the spraying state and the washing / sterilizing state. The flow path forming member 106 such as the two-fluid spray nozzle 100.
It is possible to easily adjust the discharge opening area of the discharge opening of each flow path, as compared with the case where the rod 105 is separately provided and only the rod 105 is moved.

Also in the two-fluid spray nozzle 400 having the above-described structure, the first discharge port 403a and the second discharge port 404 for discharging the fluid at the time of spraying and at the time of cleaning / sterilization.
Since the discharge opening area of a is different and the discharge opening area is larger in the cleaning / sterilization state than in the case of spraying, the same effect as that of the above-mentioned two-fluid spray nozzle 100, that is, the following effect can be obtained. You can

As described above, in the two-fluid spray nozzle of the present invention, at the time of cleaning / sterilization, the discharge opening of the flow channel can be made sufficiently large as necessary for cleaning / sterilization. There is almost no decrease in the flow velocity of steam, and there is almost no decrease in the steam temperature in the flow path.

Therefore, according to the two-fluid spray nozzle of the present invention, the flow rate of any cleaning liquid is not lowered, and the temperature of steam of any temperature is not lowered. This allows
Not only the cleaning conditions and sterilization conditions set in the present embodiment are effective, but also various cleaning conditions and sterilization conditions can be applied.

In this embodiment, as an example of the sterilization condition, the flow path is maintained at 121 ° C. for 20 minutes, but in practice, the sterilization level is set depending on the sterilization level, that is, the degree of sterilization. As temperature and maintenance time change,
The set temperature and maintenance time of the flow path may be changed each time. However, as described above, according to the two-fluid spray nozzle of the present invention, a desired level of sterilization can be effectively performed under any sterilization condition.

Further, in the above embodiment, as an example of sterilizing the two-fluid spray nozzle, an example of flowing steam through each flow path has been shown, but the present invention is not limited to this.
Depending on the desired sterilization level, for example, sterile water (pure water)
Water) may be supplied to each flow path in a large amount at a high flow rate. Even in such a case, in the above-mentioned two-fluid spray nozzle, water can be caused to flow at a stable flow rate, and the desired sterilization level can be reliably achieved.

[0125]

As described above, the two-fluid spray nozzle according to the first aspect of the present invention is a two-fluid spray nozzle that mixes two kinds of fluids and sprays them from the tip opening portion. A first flow path for guiding the other fluid to the tip opening, and a second flow path for guiding the other fluid to the tip opening, and further discharging a fluid from the first flow path to the tip opening. A discharge opening for adjusting the discharge opening area so that the discharge opening 1 and the second discharge opening for discharging the fluid from the second flow path to the tip opening are larger than the respective discharge openings when spraying each fluid. This is a configuration in which area adjusting means is provided.

Therefore, the discharge opening area adjusting means adjusts the discharge opening area for discharging the fluid guided from each flow path to the tip opening so as to be larger than that at the time of spraying, so that the discharge opening areas are discharged. The flow rate of the generated fluid can be made larger than that during spraying.

Thus, for example, when steam is circulated in each channel, the temperature required for sterilization can be stably maintained in each channel for a required time.
A sterilization process can be performed without disassembling the nozzle by a wet heat sterilization (high-pressure steam sterilization) operation generally applied as a sterilization method.

Further, the discharge opening area adjusting means adjusts the discharge opening area for discharging the fluid guided from each flow path to the tip opening so as to be larger than that at the time of spraying. Can be maintained at the desired value. Therefore, the cleaning liquid can be flowed from the fluid inlet of the flow path to the tip opening portion at a flow rate required for cleaning, so that the flow path can be efficiently cleaned.

As described above, the two-fluid spray nozzle according to the second aspect of the present invention is a two-fluid spray nozzle that mixes two kinds of fluids and sprays them from the tip opening portion. An inner pipe forming a first flow path for guiding, an outer pipe provided on the outer peripheral surface side of the inner pipe and forming a second flow path for guiding the other fluid to the tip opening, Between the first position and the second position in the pipe and the outer pipe, provided so as to be movable relative to the inner pipe and the outer pipe, and guided from the inner pipe and the outer pipe at the first position, respectively. A fluid atomization channel having an aperture having a diameter necessary for atomizing the fluid is formed, and an opening channel having an aperture having a diameter larger than that of the fluid atomization channel is formed at the second position. And a flow path forming member to be provided.

Therefore, when the flow path forming member is relatively moved to the second position with respect to the outer tube and the inner tube when not spraying, an opening having a diameter larger than that of the fluid atomization flow path is provided. Since the opening channel is formed, the flow rate of the fluid discharged from each outlet of the outer tube and the inner tube can be made larger than that in the case where the fluid is allowed to flow in the fluid atomization channel.

With this, as in the case of the first aspect of the present invention, since it can be sterilized by a wet heat sterilization (high pressure steam sterilization) operation generally applied as a sterilization method for a two-fluid spray nozzle, the sterilization is performed without disassembling the nozzle. be able to.

If the flow path forming member is relatively moved to the second position with respect to the outer tube and the inner tube when not spraying,
Since an opening channel having an opening with a diameter larger than that of the fluid atomization channel is formed, a decrease in the flow velocity of the fluid from the fluid inlet to the tip opening is reduced by the fluid atomization channel in each channel. Can be smaller.

Therefore, since the flow velocity required for cleaning the flow passage in the two-fluid spray nozzle can be maintained from the fluid inlet of the flow passage to the tip opening, the flow passage can be efficiently cleaned. The effect is played together.

The flow channel forming member and each flow channel (fluid atomization flow channel and opening flow channel) may be configured as follows.

That is, as described in claim 3, the flow path forming member includes a first forming member forming a discharge port for the fluid introduced from the inner pipe, and a discharge port for the fluid introduced from the outer pipe. And a second forming member that forms a fluid-atomization flow path when the flow path forming member relatively moves to the first position and the first forming member is in close contact with the inner pipe. At the same time, a fluid atomization flow path is formed between the second forming member and the outer tube, and the flow path forming member is the second flow path forming member.
When the second forming member moves relatively to the position, the first forming member separates from the inner pipe to form an opening channel, and
An open channel may be formed between the forming member and the outer tube.

As means for moving the flow path forming member, a bellows or a diaphragm valve is preferably used as described in claim 3 or 4.

In particular, the bellows is preferably used in an apparatus that requires cleaning and sterilization without invading bacteria and dirt from the outside into the inner tube and the outer tube.

Further, the above-mentioned two-fluid spray nozzle may be used in a granulating apparatus and a granulating system as described below.

That is, the granulating apparatus according to the invention of claim 6 sprays two kinds of fluid into the granulating chamber for producing target particles from the two kinds of fluid sprayed inside. In a granulating apparatus having a two-fluid spray nozzle for supplying, the two-fluid spray nozzle according to any one of claims 1 to 5 is used as the two-fluid spray nozzle.

According to the above-mentioned constitution, the granulating apparatus of the present invention uses the two-fluid spray nozzle which can be efficiently washed and can be surely sterilized.
It has the effect of being suitable for applications that require sterilization, such as the production of food and foodstuffs.

The granulating system according to the invention of claim 7 is the granulating apparatus according to claim 6, and the first fluid supply for supplying the first fluid to the two-fluid spray nozzle provided in the granulating apparatus. An apparatus, a second fluid supply device that supplies a second fluid to the two-fluid spray nozzle, and a first cleaning device that supplies at least one of a cleaning liquid and steam to a first flow path in the two-fluid spray nozzle. The second flow path in the two-fluid spray nozzle is provided with a second cleaning device that supplies at least one of cleaning liquid and steam, and a third cleaning device that supplies at least one of cleaning liquid and steam to the granulating device. It is a composition.

Since the granulating system having the above-mentioned constitution has the granulating apparatus according to claim 6, that is, the two-fluid spray nozzle according to any one of claims 1 to 5, pharmaceuticals, pharmaceutical materials, It has the effect of being suitable for applications that require sterilization, such as the production of food and foodstuffs.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a two-fluid spray nozzle of the present invention.

FIG. 2 is a schematic configuration block diagram of a granulation system including a granulation apparatus including the two-fluid spray nozzle shown in FIG. 1 as a component.

3 (a) is an explanatory diagram showing a state of the two-fluid spray nozzle shown in FIG. 1 during spraying, and FIG. 3 (b) shows a state of the two-fluid spray nozzle shown in FIG. 1 during washing / sterilization. It is an explanatory view shown.

FIG. 4 is a graph showing the relationship between time and temperature inside the two-fluid spray nozzle shown in FIG. 1 and a conventional two-fluid spray nozzle.

5 shows another example of the flow path forming member in the two-fluid spray nozzle shown in FIG. 1, (a) is an explanatory view showing a state at the time of spraying, and (b) is shown in (a). It is a top view of the 1st adjustment member of the flow path formation member, and (c) is an explanatory view showing the state at the time of washing and sterilization.

FIG. 6 is a schematic cross-sectional view showing a fluid spraying state of a two-fluid spray nozzle according to another embodiment of the present invention.

FIG. 7 is a schematic sectional view showing a cleaning / sterilizing state of the two-fluid spray nozzle shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Granulator 2 Raw material supply part (1st fluid supply device) 3 Compressed air supply part (2nd fluid supply device) 4 Flowing air supply part 5 Exhaust part 6 1st washing / sterilization part (3rd washing device) 7 Second cleaning / sterilization unit (third cleaning device) 8 Third cleaning / sterilization unit (first cleaning device) 9 Fourth cleaning / sterilization unit (second cleaning device) 11 Air piston (discharging opening area adjusting means) 100 2 Fluid spray nozzle 100a Tip opening 101 Inner casing (inner tube) 102 Outer casing (outer tube) 103 First channel 104 Second channel 105 Rod (discharging opening area adjusting means) 106 Channel forming member (discharging opening area adjustment) Means) 106a First adjusting member (first forming member) 106b Second adjusting member (second forming member) 107 Slit 109 Bellows 200 Granulation chamber 300 Flow path forming member 301 First adjusting member ( 1 forming member) 301a pore 400 two-fluid spray nozzle 400a tip opening 401 inner casing (inner pipe) 402 outer casing (outer pipe, discharge opening area adjusting means) 403 first flow passage 404 second flow passage 500 rod (discharge) Opening area adjusting means) 600 Bellows

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Enomura             5-60 Minamitsumori, Nishinari-ku, Osaka-shi, Osaka Prefecture               M Technique Co., Ltd. (72) Inventor Masashi Saito             3-9-7 Itabashi, Itabashi-ku, Tokyo Hosoka             Wamicron Co., Ltd. (72) Inventor Naoshitoshi Kinoshita             Hosokata, Hirakata, Osaka             Kawamicron Co., Ltd. F term (reference) 3B201 AA48 BB38 BB82 BB90 BB92                       BB98                 4C058 AA12 AA24 BB05                 4F033 QA08 QA09 QB02Y QB03X                       QB12Y QB15X QB15Y QB17                       QD02 QD19 QE06 QE09 QF07Y                       QF08X                 4G004 EA02 EA06

Claims (7)

[Claims] 1. A two-fluid spray nozzle which mixes two kinds of fluid and sprays from the tip opening, and a first flow path for guiding one fluid to the tip opening, and the other fluid to the tip opening. A second flow path for guiding the fluid to the end portion, a first discharge port for discharging fluid from the first flow path to the tip opening, and a fluid from the second flow path to the tip opening. A two-fluid spray nozzle, characterized in that a discharge opening area adjusting means for adjusting the discharge opening area is provided so that the second discharge outlet is larger than the respective discharge openings when the respective fluids are sprayed. 2. A two-fluid spray nozzle which mixes two kinds of fluid and sprays from the tip opening, and an inner tube forming a first flow path for guiding one fluid to the tip opening, An outer pipe provided on the outer peripheral surface side of the pipe and forming a second flow path for guiding the other fluid to the tip opening, and a first position and a second position in the inner pipe and the outer pipe. Between the inner pipe and the outer pipe, and at the first position, the fluid atomization having openings having a diameter necessary for spraying the respective fluids introduced from the inner pipe and the outer pipe. A flow path forming member that forms a flow path and that forms an opening flow path having an opening having a larger diameter than the fluid atomization flow path is provided at the second position. Two-fluid spray nozzle. 3. The flow path forming member comprises a first forming member forming a discharge port for a fluid introduced from the inner pipe and a second forming member forming a discharge port for a fluid introduced from the outer pipe. When the flow path forming member relatively moves to the first position, the first forming member comes into close contact with the inner pipe to form a fluid atomization flow path, and the second forming member and the above When the fluid atomization flow path is formed between the outer tube and the flow path forming member relatively moves to the second position, the first forming member separates from the inner tube to form an open flow path. The two-fluid spray nozzle according to claim 2, wherein an opening channel is formed between the second forming member and the outer tube. 4. A two-fluid spray nozzle according to claim 2, wherein a bellows is used as a means for moving the flow path forming member. 5. The two-fluid spray nozzle according to claim 2 or 3, wherein a diaphragm valve is used as a means for moving the flow path forming member. 6. Granulation provided with a granulation chamber for producing target particles from two kinds of fluid sprayed inside, and a two-fluid spray nozzle for spraying two kinds of fluid into the granulation chamber. In the apparatus, the two-fluid spray nozzle according to any one of claims 1 to 5 is used as the two-fluid spray nozzle. 7. A granulating apparatus according to claim 6, and a two-fluid spray nozzle provided in the granulating apparatus, wherein
A first fluid supply device for supplying a fluid, a second fluid supply device for supplying a second fluid to the two-fluid spray nozzle, and a first flow path in the two-fluid spray nozzle with at least one of a cleaning liquid and steam. A first cleaning device for supplying, a second cleaning device for supplying at least one of a cleaning liquid and steam to a second flow path in the two-fluid spray nozzle, and a first cleaning device for supplying at least one of a cleaning liquid and steam to the granulating device. 3. A granulation system comprising: a cleaning device.