JP3867267B2 - Powder production apparatus using liquid raw material and method for producing powder using this apparatus - Google Patents

Description

[0001]
TECHNICAL FIELD The present invention relates to the production of a granular material using a liquid raw material, and in particular, the production of a granular material using a liquid raw material that prevents generation of contamination and does not cause quality deterioration, and further has good production efficiency. The present invention relates to an apparatus and a method for producing a granular material using the apparatus.
[0002]
BACKGROUND OF THE INVENTION
Conventionally, in the processing of granular materials such as foods, pharmaceuticals, agricultural chemicals, feeds, chemicals, etc., when obtaining the granular materials by drying the liquid raw material, it is possible to dry with a shelf-type vacuum freeze dryer or freezing chamber A dryer (for example, Japanese Examined Patent Publication No. 42-9719) or the like provided with a vibration conveyor in the drying chamber is used.
However, in drying and granulating liquid raw materials using these types of dryers, there are the following problems.
[0003]
First, in the case of a shelf-type vacuum freeze dryer, since the liquid raw material is input and the dried product is taken out manually, the manufacturing cost increases. Further, when the liquid raw material is charged and the dried product is taken out, dust is mixed in the drying chamber and contamination occurs. Furthermore, since a heating shelf, a cooling shelf, a heat medium circulation pipe and a machine frame for supporting these are arranged in the apparatus, the sanitary property is insufficient.
[0004]
Further, as shown in FIG. 5, the apparatus disclosed in the above Japanese Patent Publication No. 42-9719 uses the radiant heat of the heater provided in the drying chamber 10 'as the sublimation heat necessary for drying. It is necessary to set to a high temperature, and the granular material in the middle of drying may be burnt and thermally deteriorated. Further, since the nozzle 51 'for spraying the liquid raw material L is provided in an upward state at the lower part of the freezing portion 5', the frozen material G tends to adhere to the nozzle 51 ', and as a result, the sizes of the sprayed droplets are uneven. Thus, when the deposit grows and falls into the drying chamber 10 ', drying unevenness is caused. Furthermore, since the freezing section 5 'is forcibly cooled using a freezing and condensing coil, the freezing section 5' chamber is complicated and enlarged, resulting in an increase in cost and a large installation space. Furthermore, the friction part of the link mechanism involved in the vibration of the vibration conveyor and the scorch by the heater fall on the conveyance part of the vibration conveyor that conveys the object to be processed, resulting in contamination. Furthermore, since the vibration conveyor is located in the drying chamber 10 ', the sanitary property is insufficient, and therefore, it is not suitable for continuously processing different types of liquid raw materials.
[0005]
[Technical problem to be solved]
The present invention has been made in view of such a background, prevents the occurrence of contamination, does not cause quality deterioration due to heat, and further reduces the cost required for drying and granulation processing. It is an object of the present invention to develop a granular material manufacturing apparatus using a novel liquid raw material and a manufacturing method of the granular material using this apparatus.
[0006]
[Means for Solving the Problems]
That is, the granular material manufacturing apparatus using the liquid raw material according to claim 1 includes a casing having an internal space as a drying chamber with an elastic body interposed on a base, and the casing is vibrated by a vibrator unit. Thus, in the apparatus for drying the object to be processed while flowing the object to be processed put into the drying chamber, the drying chamber is an indirect heating type using a heating medium, and the drying chamber A vacuum pump for depressurizing the inside, a freezing portion in communication with the inlet in the housing, and a nozzle for spraying a liquid raw material on the freezing portion. It consists of features .
According to the present invention, since no foreign matters are mixed into the liquid raw material and the frozen material, the occurrence of contamination can be prevented. In addition, since no manual operation is required to input the liquid raw material and discharge the dried product, the cost is not increased. Furthermore, since drying is performed by indirect heating using a heating medium, thermal deterioration does not occur. Furthermore, since the sanitary property of the drying chamber is good, it is possible to realize use in which different types of liquid raw materials are continuously processed.
In addition, since a space in which the liquid raw material sprayed from the nozzle is self-frozen is secured, the liquid raw material can be supplied to the drying chamber as a granular frozen material, and the flow state of the object to be processed in the drying chamber can be improved. Can be.
[0007]
In addition to the above requirements , the granular material manufacturing apparatus using the liquid raw material according to claim 2 is characterized in that the frozen portion and the casing are connected by a flexible tube.
According to the present invention, the vibration of the casing transmitted to the freezing portion can be mitigated, so that the influence of the casing vibration on the spraying of the liquid raw material from the nozzle and the self-freezing of the liquid raw material is avoided. can do.
[0008]
Furthermore, the method for producing a granular material according to claim 3 uses the granular material production apparatus according to claim 1 or 2 to evacuate the inside of the freezing part and the drying chamber, and from the nozzle to the freezing part. In this freezing part, the liquid raw material is self-frozen into a fine granule, and then the frozen product is guided into a drying chamber and sublimated and dried while applying vibration.
According to the present invention, since a space for self-freezing the liquid raw material sprayed from the nozzle is secured, the liquid raw material can be supplied to the drying chamber as a granular frozen material, and the flow of the object to be processed in the drying chamber A state can be made favorable.
The above problems can be solved by using the configuration of the invention described in each of the claims as a means.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the powder manufacturing apparatus using the liquid raw material of the present invention and the manufacturing method of the powder using the apparatus will be described. After describing the configuration of the powder manufacturing apparatus, the operation mode of the apparatus and The manufacturing method of the granular material of this invention is demonstrated collectively.
In addition, about the structure of a granular material manufacturing apparatus, since several forms can be taken according to the property of the liquid raw material L, etc., it demonstrates below for every granular material manufacturing apparatus from which a structure was varied.
[0010]
Embodiment 1
1 and 2 is a powder body manufacturing apparatus of the present invention, which is a base 1 with a housing 1 having an internal space as a drying chamber 10 with an elastic body 2 interposed therebetween. The vibrator unit 4 is provided on the mount bracket 3 attached to the housing 1 while being placed. Further, the freezing section 5 is in communication with the insertion port 15 in the housing 1. Furthermore, the granular material manufacturing apparatus D includes a vacuum generator 6 including a condenser and a vacuum pump and a heat medium circulating machine 7 as peripheral devices, and the inside of the freezing unit 5 and the drying chamber 10 is evacuated. In addition, the inside of the drying chamber 10 is indirectly heated. The granular material manufacturing apparatus D configured as described above self-freezes the liquid raw material L sprayed in the freezing section 5 to obtain a fine granular frozen material G, and subsequently puts this frozen material G into the drying chamber 10. Then, the frozen material G is dried while flowing by vibrating the casing 1 with the vibrator unit 4 to obtain a granular material.
[0011]
Hereinafter, various members constituting the powder particle manufacturing apparatus D will be described in detail.
First, the base B will be described. As an example, as shown in FIGS. 1 and 2, the base B is constructed by appropriately combining steel materials, and four support columns C are erected on the base B. Is done.
The elastic body 2 is a columnar member formed of an elastic member such as a spring or a vibration proof rubber.
[0012]
Next, the case 1 will be described. This is a horizontally-placed cylindrical member having an internal space as a drying chamber 10, four fixed legs 11 are formed on the side periphery of the case 1, and both cylindrical openings are formed. The side plate 12 is provided to be freely opened and closed.
Further, an inner jacket plate 13 is provided inside the casing 1 and the side plate 12, and a heat medium nozzle 14 is attached to the heat medium nozzle 14, and a heat medium circulator 7 such as hot water is connected to the heat medium nozzle 14.
[0013]
In addition, an inlet 15 is formed in the side periphery of the casing 1, an outlet 16 is formed in the side plate 12 located on the opposite side, and an outlet 17 is formed in the approximate center of the casing 1. The vacuum generator 6 is connected to the exhaust port 17 using a flexible pipe F or the like. In addition, a measurement port 18 is formed at an appropriate location of the casing 1, and a temperature sensor, a humidity sensor, and the like are attached to the measurement port 18 and connected to an appropriate control panel (not shown).
[0014]
The discharge port 16 is opened and closed by a lid body 16a. The lid body 16a approaches and separates from the discharge port 16 by operating a handle 16c provided in the duct 16b. Of course, the lid 16a can be opened and closed by using a motor as appropriate so that no manual operation is required.
Further, a drain port 19 is formed in the lower part of the housing 1. In this embodiment, the drying chamber 10 is installed on the base B with the discharge port 16 side inclined downward by 1 to 2 ° with respect to the horizontal line.
[0015]
A cylindrical freezing portion 5 is provided for the charging port 15, and the freezing portion 5 is in communication with the drying chamber 10 and the upper end is closed.
In addition, an upper portion in the freezing section 5 is provided with a nozzle 51 to which a spray nozzle or the like is applied as an example. In this embodiment, the nozzle 51 is installed so that the jet outlet faces downward. A pipe line is connected to the nozzle 51, and a raw material tank 52, a pump 53, and a valve 54 are provided to the pipe line, so that the liquid raw material L charged into the raw material tank 52 is frozen. It was configured so that it could be sprayed inside. Furthermore, when a fluororesin is used as the material of the nozzle 51 or when the nozzle 51 is coated with a fluororesin, it is effective for preventing the liquid material L from adhering.
[0016]
As shown in FIG. 1, the mount bracket 3 is fixed to the lower part of the outer periphery of the housing 1, and the vibrator unit 4 having an eccentric weight is fixed to the mount bracket 3.
[0017]
The granular material manufacturing apparatus D of the present invention is configured as described above as an example. Hereinafter, the method for manufacturing the granular material of the present invention will be described together with the operation mode of the granular material manufacturing apparatus D. To do.
(1) Setting of the device First, prior to the operation of the granular material manufacturing device D, both side openings of the casing 1 are closed by the side plate 12, and the discharge port 16 is closed by the lid 16a. Further, the number of rotations of the vibrator unit 4 is determined according to the shape, particle size, weight, etc. of the frozen material G put into the drying chamber 10, and the vibration cycle and amplitude are set. In this embodiment, as an example, the rotation speed is 1800 rpm.
Furthermore, the pressure in the drying chamber 10 is set by the vacuum generator 6, and the temperature and flow rate of the heat medium circulated by the heat medium circulator 7 are set.
[0018]
(2) Self-freezing of liquid raw material Then, the vacuum generator 6 is activated to bring the drying chamber 10 and the freezing part 5 into a vacuum state, and the heating medium circulator 7 is activated to start circulating supply of the heating medium. Further, the vibrator unit 4 is activated to vibrate the housing 1.
Subsequently, the pump 53 is started and the opening degree of the valve 54 is appropriately adjusted to spray the liquid raw material L into the freezing part 5 from the nozzle 51. In the process of falling inside 5, it becomes self-freezing and becomes a fine frozen material G having a diameter of about 0.3 to 1.5 mm. Thereafter, the frozen material G falls into the drying chamber 10 through the inlet 15.
At this time, the vibration of the vibration unit 4 is transmitted to the nozzle 51. Therefore, even if the frozen material G adheres to the nozzle 51, the nozzle 51 before it grows. Since it leaves | separates from 51, it can avoid that the spraying state of the liquid raw material L deteriorates.
[0019]
(3) Drying operation Next, the frozen material G that has reached the inside of the drying chamber 10 is distributed over a wide area in the longitudinal direction of the drying chamber 10 while flowing under the vibration force from the vibration unit 4. Is indirectly sublimated and dried.
Further, the water vapor generated at this time reaches the vacuum generator 6 from the exhaust port 17 and is appropriately discharged to the outside.
[0020]
(4) Discharge operation When the moisture content of the frozen material G eventually becomes a desired value by a temperature sensor or the like, or when a preset processing time has elapsed, the discharge port 16 is opened. It is opened and discharged to the outside as a granular material in a desired dry state.
[0021]
(5) Cleaning operation In addition, when processing different types of liquid raw materials L continuously, cleaning of the granular material manufacturing apparatus D is necessary. However, the granular material manufacturing apparatus D of the present invention includes the drying chamber 10. And since the internal structure of the freezing part 5 is simple and can be washed with water, it is possible to process different types of liquid raw materials L continuously.
[0022]
As described above, according to the granular material manufacturing apparatus D of the present invention and the granular material manufacturing method using this apparatus, only the frozen material G in which the liquid raw material L is frozen in a fine granular form is supplied into the drying chamber 10. In addition, since no dust or the like is mixed in and no burning occurs, no contamination occurs.
Furthermore, since the liquid raw material L can be input into the granular material manufacturing apparatus D and the obtained granular material can be discharged without manual operation, the manufacturing cost of the granular material can be suppressed.
[0023]
Embodiment 2
Subsequently, a powder particle manufacturing apparatus D configured as shown in FIG. 3 and a powder particle manufacturing method using this apparatus will be described.
The granular material manufacturing apparatus D shown in FIG. 3 includes a freezing portion in communication with the insertion port 15 in the housing 1, and a flexible tube is provided between the freezing portion 5 and the housing 1. 55 is connected. In addition, since the other structure is common with the granular material manufacturing apparatus D shown in the said Embodiment 1, description is abbreviate | omitted.
Moreover, the granular material manufacturing apparatus D shown by this embodiment becomes a suitable structure, when using the highly viscous liquid raw material L so that it may mention later.
[0024]
The granular material manufacturing apparatus D of the present invention is configured as described above as an example. Hereinafter, the method for manufacturing the granular material of the present invention will be described together with the operation mode of the granular material manufacturing apparatus D. To do. In this embodiment as well, as in the first embodiment, “(1) Setting of apparatus”, “(2) Self-freezing of liquid raw material”, “(3) Drying operation”, “(4) The granular material is manufactured in the order of “discharging operation” and “(5) cleaning operation”, and the duplicated contents will be described just in case.
[0025]
(1) Setting of the device First, prior to the operation of the granular material manufacturing device D, both side openings of the casing 1 are closed by the side plate 12, and the discharge port 16 is closed by the lid 16a. Further, the number of rotations of the vibrator unit 4 is determined according to the shape, particle size, weight, etc. of the frozen material G put into the drying chamber 10, and the vibration cycle and amplitude are set. In this embodiment, as an example, the rotation speed is 1800 rpm.
Furthermore, the pressure in the drying chamber 10 is set by the vacuum generator 6, and the temperature and flow rate of the heat medium circulated by the heat medium circulator 7 are set.
[0026]
(2) Self-freezing of liquid raw material Then, the vacuum generator 6 is activated to bring the drying chamber 10 and the freezing part 5 into a vacuum state, and the heating medium circulator 7 is activated to start circulating supply of the heating medium. Further, the vibrator unit 4 is activated to vibrate the housing 1.
Subsequently, the pump 53 is started and the opening degree of the valve 54 is appropriately adjusted to spray the liquid raw material L into the freezing part 5 from the nozzle 51. In the process of falling inside 5, it becomes self-freezing and becomes a fine frozen material G having a diameter of about 0.3 to 1.5 mm. Thereafter, the frozen material G falls into the drying chamber 10 through the inlet 15.
At this time, the vibration of the vibration unit 4 transmitted to the freezing section 5 is alleviated, and the casing is used for spraying the liquid raw material L (particularly high viscosity) from the nozzle 51 and self-freezing the liquid raw material L. It is possible to avoid the influence of the vibration of 1 from being affected.
[0027]
(3) Drying operation Next, the frozen material G that has reached the inside of the drying chamber 10 is distributed over a wide area in the longitudinal direction of the drying chamber 10 while flowing under the vibration force from the vibration unit 4. Is indirectly sublimated and dried.
Further, the water vapor generated at this time reaches the vacuum generator 6 from the exhaust port 17 and is appropriately discharged to the outside.
[0028]
(4) Discharge operation When the moisture content of the frozen material G eventually becomes a desired value by a temperature sensor or the like, or when a preset processing time has elapsed, the discharge port 16 is opened. It is opened and discharged to the outside as a granular material in a desired dry state.
[0029]
(5) Cleaning operation In addition, when processing different types of liquid raw materials L continuously, cleaning of the granular material manufacturing apparatus D is necessary. However, the granular material manufacturing apparatus D of the present invention includes the drying chamber 10. And since the internal structure of the freezing part 5 is simple and can be washed with water, it is possible to process different types of liquid raw materials L continuously.
[0030]
As described above, according to the granular material manufacturing apparatus D of the present invention and the granular material manufacturing method using this apparatus, only the frozen material G in which the liquid raw material L is frozen in a fine granular form is supplied into the drying chamber 10. In addition, since no dust or the like is mixed in and no burning occurs, no contamination occurs. Furthermore, since the liquid raw material L can be input into the granular material manufacturing apparatus D and the obtained granular material can be discharged without manual operation, the manufacturing cost of the granular material can be suppressed.
[0031]
[ Reference examples related to the present invention ]
Next, a powder particle manufacturing apparatus D having a configuration related to the present invention as shown in FIG. 4 and a powder particle manufacturing method using this apparatus will be described.
The granular material manufacturing apparatus D shown in FIG. 4 is configured such that the nozzle 51 is arranged in the upper part of the drying chamber 10 near the discharge port 16 without providing the cylindrical freezing section 5 and the input port 15. This nozzle 51 was installed so as to be oriented sideways so that the jet outlet directed toward the exhaust port 17.
In addition, since the other structure is common in the granular material manufacturing apparatus D shown in the said Embodiment 1 or Embodiment 2, description is abbreviate | omitted.
Moreover, the granular material manufacturing apparatus D shown by this reference example becomes a suitable structure when attaching importance to cost performance.
[0032]
The granular material manufacturing apparatus D shown in this reference example is configured as described above as an example. Hereinafter, a method for manufacturing the granular material will be described together with the operation mode of the granular material manufacturing apparatus D. . In this reference example , as in the first and second embodiments, “(1) Setting of the apparatus”, “(2) Self-freezing of liquid raw material”, “(3) Drying operation”, “(4 )) Discharge operation "and" (5) Cleaning work "are performed in order, and the part where the contents overlap is also explained just in case.
[0033]
(1) Setting of the device First, prior to the operation of the granular material manufacturing device D, both side openings of the casing 1 are closed by the side plate 12, and the discharge port 16 is closed by the lid 16a. Further, the number of rotations of the vibrator unit 4 is determined according to the shape, particle size, weight, etc. of the frozen material G put into the drying chamber 10, and the vibration cycle and amplitude are set. In this reference example , the rotation speed was set to 1800 rpm as an example.
Furthermore, the pressure in the drying chamber 10 is set by the vacuum generator 6, and the temperature and flow rate of the heat medium circulated by the heat medium circulator 7 are set.
[0034]
(2) Self-freezing of the liquid raw material Then, the vacuum generator 6 is activated to bring the inside of the drying chamber 10 into a vacuum state, the heat medium circulator 7 is activated to start circulation supply of the heat medium, and the vibrator unit 4 Is activated to vibrate the housing 1.
Subsequently, the pump 53 is started, and the opening degree of the valve 54 is adjusted as appropriate to spray the liquid material L into the drying chamber 10 from the nozzle 51. In the process of falling while proceeding in the longitudinal direction in 10, it becomes self-freezing and becomes a fine granular frozen material G having a diameter of about 0.3 to 1.5 mm.
At this time, the vibration of the vibration unit 4 is transmitted to the nozzle 51. Therefore, even if the frozen material G adheres to the nozzle 51, the nozzle 51 before it grows. Since it leaves | separates from 51, it can avoid that the spraying state of the liquid raw material L deteriorates.
[0035]
(3) Drying operation Next, the frozen material G is distributed over a wide area in the longitudinal direction of the drying chamber 10 while flowing under the vibration force from the vibration unit 4, and in this state indirectly receives heat from the heating medium and sublimates. It is something to dry.
Further, the water vapor generated at this time reaches the vacuum generator 6 from the exhaust port 17 and is appropriately discharged to the outside.
[0036]
(4) Discharge operation When the moisture content of the frozen material G eventually becomes a desired value by a temperature sensor or the like, or when a preset processing time has elapsed, the discharge port 16 is opened. It is opened and discharged to the outside as a granular material in a desired dry state.
[0037]
(5) Cleaning operation In addition, when processing different types of liquid raw materials L continuously, cleaning of the granular material manufacturing apparatus D is necessary. However, the granular material manufacturing apparatus D of the present invention includes the drying chamber 10. The internal structure is simple and can be washed with water, so that different types of liquid raw materials L can be processed successively.
[0038]
As described above, according to the granular material manufacturing apparatus D having the configuration related to the present invention and the granular material manufacturing method using this apparatus, the liquid raw material L is frozen in the drying chamber 10 in a fine granular form. Since only the object G is supplied and no dust or the like is mixed in, and no burning or the like occurs, no contamination occurs. Furthermore, since the liquid raw material L can be input into the granular material manufacturing apparatus D and the obtained granular material can be discharged without manual operation, the manufacturing cost of the granular material can be suppressed.
[0039]
【The invention's effect】
According to the present invention, it is possible to prevent the occurrence of contamination, cause no deterioration in quality due to heat, and further reduce the cost required for the drying / granulation treatment.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a side view showing a partially broken powder manufacturing apparatus of the present invention.
FIG. 2 is a front view and a rear view of the same.
FIG. 3 is a side view showing a partially broken view of the apparatus for producing a granular material of the present invention with different forms.
FIG. 4 is a side view showing a partially broken powder manufacturing apparatus having a configuration related to the present invention .
FIG. 5 is a longitudinal sectional view showing an existing powder particle manufacturing apparatus.
[Explanation of symbols]
D Powder and Particle Manufacturing Device 1 Case 10 Drying Room 11 Fixed Leg 12 Side Plate 13 Jacket Inner Plate 14 Heat Medium Nozzle 15 Input Port 16 Discharge Port 16a Lid 16b Duct 16c Handle 17 Exhaust Port 18 Measurement Port 19 Drain Port 2 Elastic Body 3 Mount Bracket 4 Vibrator Unit 5 Freezing Section 51 Nozzle 52 Raw Material Tank 53 Pump 54 Valve 55 Flexible Tube 6 Vacuum Generator 7 Heating Medium Circulator B Base C Support Column F Flexible Pipe G Frozen Material L Liquid Raw Material

Claims (3)

A housing having an internal space as a drying chamber with an elastic body interposed on the base, and vibrating the casing by a vibrator unit, while flowing the object to be processed put into the drying chamber In the apparatus for drying an object to be treated, the drying chamber is of an indirect heating type using a heating medium, and a vacuum pump for reducing the inside is connected to the drying chamber, and the casing An apparatus for producing a granular material using a liquid material, comprising: a freezing portion in communication with the charging port in the first portion; and a nozzle for spraying the liquid raw material on an upper portion of the freezing portion. The frozen portion and granular material manufacturing apparatus using the liquid material according to claim 1, characterized in that connected by a flexible tube between housing. Using the apparatus for producing a granular material according to claim 1 or 2 , the inside of the freezing part and the drying chamber is evacuated, and the liquid raw material is sprayed into the freezing part from the nozzle so that the liquid raw material is finely granulated in the freezing part. A method for producing a granular material, wherein the frozen material is self-frozen and then sublimated and dried while guiding the frozen material into a drying chamber and applying vibration.

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