JP4261658B2 - Stir processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agitation processing apparatus that performs processing such as mixing or drying of a material to be processed at normal pressure or vacuum, and more specifically, supplying a gas to the vicinity of an inner peripheral wall of an inverted conical container. The present invention relates to an agitation processing apparatus that performs efficient mixing or drying while preventing adhesion to a peripheral wall.
[0002]
[Prior art]
In the case where the temperature cannot be increased or the organic solvent is removed as a drying apparatus for the powder and granular material, a vacuum type stirring type drying apparatus, for example, Japanese Patent Publication No. 1-56808, Japanese Patent Publication No. 2-331303, etc. Such a device is used.
The apparatus disclosed in Japanese Patent Publication No. 1-56808 is provided with a stirrer that stirs the material charged in the vertical mold dryer and, if necessary, a jacket that heats up to the processing temperature, on the outer periphery. A decompression source for decompressing the inside of the dryer is provided, a nozzle for introducing an inert gas into the interior is provided at the bottom, and a heater for heating the inert gas is provided. Then, the powder particles to be treated are charged into a vertical mold dryer, heated while circulating hot water or water vapor in the jacket while stirring with a stirrer, and the inside of the dryer is depressurized by operating a vacuum pump, Heated hot air, nitrogen gas, carbon dioxide gas, etc. are treated while being introduced from the bottom nozzle. Thereby, the residual quantity of the organic solvent of the granular material containing a small amount of residual organic solvent can be removed below the regulation value of food additives and the like.
[0003]
Further, the apparatus shown in the latter Japanese Examined Patent Publication No. 2-331303 has a main body of a bowl-shaped conical shape, and a stirring blade whose blade width is wider toward the top of the container is provided close to the inner wall of the container. A jacket for flowing a heat medium to heat the inside of the container is provided on the outer periphery, a vacuum generation source for reducing the pressure inside is provided, and the position of the stirring blade can be changed up and down. Then, the dryer is heated to a required temperature, and after the raw materials are charged, the pressure is reduced and drying is performed while stirring and mixing for a predetermined time. Thereby, the adhesion of the material to the heating wall surface can be prevented, the mixing in the radial direction is promoted, and even a highly adherent material can be processed.
[0004]
[Problems to be solved by the invention]
The apparatus disclosed in the above Japanese Patent Publication No. 1-56808 stirs the powder with a stirrer, but since it is formed in an inverted cone shape, the powder with poor flow is poorly replaced and stays. . In addition, a shearing force is applied to the granular material by stirring, and physical properties such as a shape change sometimes change. Further, even in the apparatus disclosed in Japanese Patent Publication No. 2-331303, in the same manner as the apparatus disclosed in Japanese Patent Publication No. 1-56808, in a granular material having poor flow, stagnation occurs and shear force is applied to the material. In some cases, the physical properties such as the shape change may change due to the deformation. The inventor of the present invention has been devised to cope with the above-described problems, and has studied a device for mixing or drying while stirring various inverted conical shapes, and by ejecting gas to a place where it tends to stay in a container. The inventors have found that it is possible to prevent the particles from staying on the inner wall surface, to increase the stirring effect, and to minimize the shearing force on the material.
[0005]
The object of the present invention is to prevent adhesion of powder particles (also called materials to be treated) to the inner wall surface of the container, minimize deformation due to shearing of the powder particles, and perform mixing or drying efficiently. The object is to provide an agitation processing apparatus.
[0006]
[Means for Solving the Problems]
The stirrer according to claim 1 of the present invention as means for achieving the above object comprises a container main body for storing the material to be processed, and an agitating mechanism provided in the container main body for stirring the material to be processed. An agitation processing apparatus provided with an exhaust device for taking out a material to be agitated by providing a take-out device at the lower part of the container body and exhausting the material from the container body, wherein a gas supply pipe for supplying gas to the container body is provided. The stirring mechanism is provided with a hollow gas passage and connected to the gas supply pipe, and at least the arm tip extended in the radial direction of the stirring mechanism located in the vicinity of the peripheral wall of the container body or connected to the arm tip A gas injection hole is provided in the peripheral surface of the connecting arm, and a material to be processed is processed by supplying gas through the gas passage from the gas injection hole to the peripheral wall portion of the container body.
[0007]
According to a second aspect of the present invention, there is provided the agitation processing apparatus according to the first aspect, wherein a gas ejection hole is provided in a lower portion of the container body. The stirring treatment apparatus according to claim 3 is the stirring treatment apparatus according to claim 1 or 2, wherein the container body is provided with a jacket connected to a heat medium supply pipe, and the gas supply pipe communicates with an inert gas supply pipe. The unloader and the stirring mechanism are provided in an airtight manner in the container body, and the material to be treated is mixed or dried. According to a fourth aspect of the present invention, there is provided the agitation processing apparatus according to the first to third aspects, wherein the evacuation device is a vacuum pump for processing in vacuum.
[0008]
The stirrer in the present invention can be used for operations such as heating, cooling, heat treatment, sterilization, egg killing, reaction, purification, etc. in addition to mixing operation and drying operation. The material to be processed in the present invention includes not only so-called powder particles but also various shapes such as flakes and leaves, and examples of applications include electronic materials, ceramics, magnetic materials, silicon carbide, Examples include fermentation promoters, traditional Chinese medicines, seasonings, feeds, resin powders, resin pellets, pharmaceuticals, cellulose, animal and vegetable residues, starches, confectionery ingredients, spices, wakame, health foods, and inorganic chlorides.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 3 show one embodiment of the present invention, FIG. 1 is a schematic diagram showing the configuration of the main part of the stirring treatment apparatus according to the present invention, and FIG. 2 shows the configuration of the rear part of the stirring processing apparatus. FIG. 3 and FIG. 4 are diagrams for explaining the stirring mechanism.
[0010]
An agitation processing apparatus according to this embodiment includes an inverted conical container body 1 for processing a material to be processed such as a granular material, an agitator 2 provided in the container body 1 for agitating the material to be processed, and an agitator 2. A drive motor 16 for driving, an unloader 3 provided at the lower part of the container body 1 for taking out the processed material, a gas supply pipe 4 for supplying gas to the container body 1, and exhausting from the container body 1 and an exhaust system 5. The container body 1 and the exhaust device 5 are connected by an exhaust pipe 6, and a separation device 7 that removes solids from the exhaust gas and an exhaust treatment device 8 that processes the exhaust gas are provided in the exhaust pipe 6, and the outer periphery of the container body 1 is heated or cooled. A jacket 9 through which a heat medium flows is provided so as to process the gas, and a gas injection hole 10 for jetting gas is provided at the tip of the arm 18 of the stirrer 2 so as to prevent the material to be processed from staying.
[0011]
The container body 1 is arranged in an inverted conical shape, a product outlet is formed on the lower diameter side of the lower portion, the take-out machine 3 is provided, the upper portion can be hermetically closed with a lid, and a jacket 9 is provided around. A material charging port 11 is provided at the upper part of the container body 1 so as to be able to be sealed, and the material is charged so as to be sealed. Further, an exhaust pipe 6 is connected to the upper part to discharge the jet gas or discharge the atmosphere to reduce the pressure. Further, a bypass pipe 12 is provided in the upper part of the container body 1 so that the exhaust gas is sent directly to the exhaust treatment device 8. A gas ejection hole 13 for injecting gas is provided at the lower part of the container body 1, the gas ejection hole 13 and the gas supply pipe 4 are communicated with each other by a gas pipe 14, and a valve 15 is provided in the gas pipe 14 to supply the gas into the container body 1. The gas supply is adjusted, and the material accumulated in the lower part is caused to flow by this gas supply. The unloader 3 uses a vacuum valve, a rotary valve, a butterfly valve or the like that can be hermetically sealed so that the container body 1 can be evacuated. And the to-be-processed material supplied to the container main body 1 processes, stirring with the stirrer 2. FIG.
[0012]
The stirrer 2 is a follower of a stirring mechanism, and an attachment shaft 17 connected to a drive motor 16 installed outside hangs down from the central portion of the container body 1 and extends radially from the attachment shaft 17 to the inner wall. Has been. As shown in FIG. 3, the mounting shaft 17 and the arm 18 of the stirrer 2 are formed in a hollow shape so that the hollow portion communicates with each other and a gas passage is formed so that gas flows through the hollow portion. The arm 18 is provided with a gas injection hole 10 at the tip thereof so as to communicate with the hollow portion. The arm 18 is composed of 18a, 18b, 18c, 18e, and 18f sequentially from above, and the longer the arm 18 is attached so as to be close to the inner wall of the container body 1, the longer the upper and lower directions. The distance between the arms attached adjacent to each other is increased upward. Further, the cross-sectional dimension of the arm 18 is small, and 18f is formed to have a smaller cross-sectional area than 18a. By comprising in this way, the efficiency of the process of a to-be-processed material is improved and the effect | action of a shear force is reduced. A drive motor 16 that rotationally drives the stirrer 2 is installed outside the container body 1 and is variable in speed so that the speed can be adjusted. The mounting shaft 17 is attached to the lid while ensuring airtightness. The gas supply pipe 4 is connected to the mounting shaft 17 and gas is supplied to the hollow gas passage.
[0013]
The gas supply pipe 4 is provided with a control valve 20 that regulates the supply of gas, an inert gas pipe 21 that communicates with an inert gas supply source (not shown), an air pipe 22 that communicates with an air supply source (not shown), and a vacuum pump 5. It connects to the circulation piping 23 connected to. The pipes 21, 22 and 23 are provided with shut-off valves 24, 25 and 26 which are turned on and off, respectively, and the inert gas pipe 21 and the air pipe 22 are provided with pressure regulating valves 27 and 28, respectively. The container body 1 is supplied independently or mixed. Each pipe 21, 22, 23 may be provided with a heating device, a cooling device, or the like, if necessary, so that a gas having a required temperature is supplied to the container body 1. The material to be treated is stirred and flowed by the stirrer 2 with the gas ejected from the gas injection hole 10 of the stirrer 2 and / or the gas ejection hole 13 provided in the lower part of the container main body 1 at normal pressure or vacuum in the container main body 1. However, drying, mixing, etc. are performed. When the processing is completed, the unloader 3 provided at the lower part (conical top) of the container body 1 is opened to take out the product. The unloader 3 provided at the lower part of the container body 1 can be appropriately opened and closed by flowing compressed air through an air cylinder, by a drive motor, or by a manual valve.
[0014]
The jacket 9 provided in the container body 1 is connected to the upper connecting pipe 31 and the lower connecting pipe 32, and the lid upper connecting pipe 33 and the lid lower connecting pipe 34 are connected to the lid. The lid upper connecting pipe 33 branches off from the upper connecting pipe 31, communicates with the steam pipe 35 and the hot water outlet pipe 36 via the upper connecting pipe 31, and a safety valve 37 is provided in the steam pipe 35, so that the water vapor pressure becomes excessive. Is preventing. The lid lower connecting pipe 34 branches from the lower connecting pipe 32 and is connected to the hot water pipe 38 and the steam drain pipe 39 through the lower connecting pipe 32. The processing temperature of the container body 1 is determined by flowing a heat medium through the upper connection pipe 31 and the upper lid connection pipe 33 or the lower connection pipe 32 and the lower lid connection pipe 34 in the jacket 9. When water vapor is used as the heat medium, water vapor is supplied from the water vapor pipe 35 to the upper connecting pipe 31 and the lid upper connecting pipe 33, and is discharged from the steam drain pipe 39 through the lower connecting pipe 32 and the lid lower connecting pipe 34 as steam drain. To do. When hot water is used as the heat medium, hot water is supplied from the lower connecting pipe 32 and the lid lower connecting pipe 34 and discharged from the upper connecting pipe 31 and the lid upper connecting pipe 33 as exhaust hot water. Further, the upper connecting pipe 31 is connected to the separator upper connecting pipe 40 connected to the upper part of the heating device of the separator 7. Similarly, the lower connecting pipe 32 is connected to the lower part of the heating device of the separator 7. The connecting pipe 41 is connected. In the container main body 1, the material to be treated is maintained at a predetermined temperature by flowing a heat medium through the jacket 9 and the lid at normal pressure or vacuum, and the gas injection hole 10 of the stirrer 2 and / or the lower part of the container main body 1. Processing such as drying and mixing is performed while stirring and flowing with the gas ejected from the gas ejection hole 13 provided and the agitator 2. The gas supplied from the gas supply pipe 4 and injected into the container body 1 is sucked into the exhaust device 5 and discharged from the upper exhaust port through the exhaust pipe 6.
[0015]
The exhaust device 5 uses a fan to operate the container body 1 at normal pressure, and uses a vacuum pump or the like when processing in vacuum. In this embodiment, a vacuum pump is used so that the inside of the container body 1 can be decompressed to a vacuum. The exhaust pipe 6 is provided with a separation device 7 and an exhaust treatment device 8 so as to process the gas exhausted from the container body 1. Separation device 7 is a device that removes solids accompanying the exhaust gas, and the type and the like are not particularly limited, and a known separation device can be used. In a dry type, a cyclone, bag filter, etc. do not require wastewater treatment. preferable. The separation device 7 of the present embodiment has a structure in which warm water or water vapor can flow as a heat medium so as to heat the organic solvent using a bag filter in order to prevent condensation. When the exhaust gas from which the solid content has been removed by the separation device 7 contains a condensable organic solvent or the like, the exhaust gas is condensed and removed by the exhaust treatment device 8 and discharged by the exhaust device 5. Alternatively, when an inert gas or the like is used and the cost increases when it is discarded, the circulation pipe 23 is branched from the exhaust pipe 6 on the discharge side of the exhaust device 5 so as to be circulated. The pipe 23 is connected to the supply pipe 4. The exhaust pipe 6 and the circulation pipe 23 are provided with shut-off valves 44 and 45, respectively, so that the circulation can be adjusted. The exhaust treatment device 8 is composed of a condenser, and removes a condensable component such as an organic solvent in the exhaust to discharge clean exhaust.
[0016]
The exhaust gas treatment device 8 for treating the exhaust gas is connected to a cooling water pipe 46 and a cooling drain pipe 47, is cooled by flowing cooling water from the cooling water pipe 46, condenses and separates condensed components, and is used for cooling to increase the temperature. The cooled water is discharged from the cooling drain pipe 47. A drain tank 48 for storing the liquid condensed and separated from the exhaust gas in the exhaust treatment device 8 is provided to temporarily store the condensate. The drain tank 48 is connected to a cold water pipe 46a branched from the cooling water pipe 46, and a drain pipe 47a for draining the used cooling water. The drain pipe 47 a is connected to the cooling drain pipe 47 and drains from the cooling drain pipe 47. The cooling water used for cooling may be used again after cooling by providing a cooling device in the cooling drain pipe 47 or may be discarded.
[0017]
Below, the driving | running method which vacuum-drys by steam heating using the stirring processing apparatus comprised as mentioned above is demonstrated. First, the valve of the steam pipe for heating the container main body 1 and the separator 7 is opened, and water vapor is supplied from the steam pipe 35 to the upper connecting pipe 31, the lid upper connecting pipe 33, and the separator upper connecting pipe 40. Is preheated to a required temperature, and the steam used for the preheating is discharged through the lower connecting pipe 32 as a steam drain. In the exhaust treatment device 8, cooling water is supplied to the cooling water pipe 46 to start cooling, and the used cooling water is discharged from the cooling drain pipe 47.
[0018]
Next, after the material to be treated is introduced into the material container body 1 from the material supply port 11 and sealed, the drive motor 16 is operated to operate the stirrer 2, and the valve 20 of the gas supply pipe 4, the inert gas pipe. 21 and the valve 15 of the gas pipe 14 are opened, inert nitrogen gas is supplied as gas from the gas injection hole 10 and the gas injection hole 13, and the exhaust device 5 is operated to decompress the container body 1. To process. When the exhaust gas sucked into the exhaust device 5 passes through the separator 7, particulate components are removed. Further, the exhaust component is condensed and removed by the exhaust treatment device 8, cleaned, and exhausted through the exhaust device 5.
[0019]
When the vacuum drying is performed for a predetermined time or when the measurement value by the measuring device reaches a predetermined value, the supply of the inert gas is reduced or the exhaust amount of the exhaust device 5 is increased, and processing is performed at a low pressure. When the treatment is completed, the exhaust device 5 is stopped, the inside of the container body 1 is filled with an inert gas to normal pressure, the gas is supplied, the water vapor is supplied, the stirrer 2 is operated, the separator 7 and the exhaust treatment device 8 are operated. The product obtained by drying the material to be treated by operating the unloader 3 with or without cooling, and taking out the product. Thereafter, the operation for processing the next material to be processed is repeated as described above.
[0020]
According to the agitation processing apparatus configured as described above, an inert gas is supplied from the gas injection hole 10 of the agitator 2 and the gas injection hole 13 at the lower part of the container body 1, and the agitator 2 and the supply gas are used. Since the material to be treated is agitated, a specific effect can be obtained that the material can be fluidized well and the shearing force applied to the material to be treated can be reduced.
[0021]
In addition, this invention is not limited to the embodiment mentioned above, The thing which can be deform | transformed within the range which does not change the main point of this invention is included. Incidentally, in the above description, the stirrer has been described as an example in which the stirring arm radially extends in the radial direction. However, as shown in FIG. 4, the arms 18a and 18b are radially extended from the mounting shaft 17 in the radial direction. The hollow connecting arms 50 and 50 are attached to 18b, and these hollow portions are connected to form a gas flow path, and the peripheral surface of the connecting arm 50 is connected to the gas flow path to form a plurality of gas injection holes 51. You may make it provide. In addition, although vacuum drying is described as an example in which nitrogen gas is always used as an inert gas, it has been explained, but when the influence of shearing force on the material to be processed is reduced, drying by an inert gas is intermittently performed. It may be carried out in an arbitrary process such as stopping in the first step, or initially flowing air and supplying an inert gas as finish drying. Moreover, although explanation of the adjusting device is omitted, it is needless to say that various amounts can be adjusted by providing a measuring device and adjusting device at a required place. Furthermore, although the configuration of the exhaust treatment is shown as an example of the dry separator and the condenser, other treatment methods may be used. Although an example in which a heating medium is supplied to the supply jacket is shown, a cooling medium may be used when cooling is required.
[0022]
【The invention's effect】
Since gas is jetted into the material to be treated from the stirring mechanism in the inverted conical container body, the adhesion of the material to be treated on the inner wall surface of the container body can be prevented, and the flow of the material to be treated is improved. As a result, the shearing force acting on the material to be treated can be reduced, deformation can be prevented, and mixing can be performed well. Since mixing is improved, the heat transfer coefficient can be increased. Further, since the gas is supplied, the drying can be satisfactorily performed, and in the case of removing the solvent, the amount of the solvent remaining in the product can be reduced.
[0023]
According to the agitation processing apparatus of the second aspect, since the gas ejection holes are provided in the lower part of the container main body and mixed, the material to be treated staying in the lower part of the container main body is made to flow more efficiently and the processing such as mixing is made efficient. be able to. According to the agitation processing apparatus of the third aspect, it is possible to process the material to be processed in a required atmosphere without leaking of the solvent and the like, and it is possible to safely process the material without deteriorating the quality of the material to be processed. According to the stirring processing apparatus of claim 4, the stirring processing apparatus of claim 4 can process in vacuum, and can efficiently remove the residual concentration of moisture and organic solvent to a low concentration.
[Brief description of the drawings]
[0024]
FIG. 1 is a schematic diagram showing a configuration of a main part of a stirring treatment apparatus according to the present invention.
FIG. 2 is a schematic view showing a configuration of a rear portion of the stirring processing apparatus.
FIGS. 3A and 3B are diagrams illustrating a stirrer, in which FIG. 3A is a front view of a main part with a part broken away, and FIG. 3B is a cross-sectional view taken along line BB in FIG.
4A and 4B are diagrams for explaining another example of a stirrer, in which FIG. 4A is a front view of a main part, and FIG. 4B is a bottom view.
[Explanation of symbols]
[0025]
1: Container body 2: Stirrer 3: Unloader 4: Gas supply piping 5: Exhaust device 6: Exhaust tube 7: Separation device 8: Exhaust treatment device 9: Jacket 10: Gas injection hole 11: Material inlet 12: Bypass piping 13: Gas ejection hole 14: Gas piping 15: Valve 16: Drive motor 17: Mounting shaft 18: Arm 20: Control valve 21: Inert gas piping 22: Air piping 23: Circulation piping 24, 25, 26: Shut-off valve 27 28: Control valve 31: Upper connecting pipe 32: Lower connecting pipe 33: Upper lid connecting pipe 34: Lower lid connecting pipe 35: Steam pipe 36: Hot water outlet 37: Safety valve 38: Hot water pipe 39: Steam drain 40: Separator Upper connecting pipe 41: Separator lower connecting pipe 44, 45: Shut-off valve 46: Cooling water pipe 47: Cooling drain pipe 48: Drain tank

Claims (4)

A container main body for storing the material to be processed, and a stirring mechanism provided in the container main body to stir the material to be processed, and a take-out processing material was taken out by providing a take-out device at the bottom of the container main body, and exhausted from the container main body a stirring apparatus comprising an exhaust system provided for the gas supply pipe for supplying gas provided in the container main body, as well as connected to a gas supply pipe provided with a hollow gas passage to the stirring mechanism, at least the A gas injection hole is provided in the distal end of the stirring mechanism located in the vicinity of the peripheral wall of the container main body in the radial direction or in the peripheral surface of the connecting arm connected to the front end of the arm , and gas is passed through the gas passage from the gas injection hole to the container main body. An agitation processing apparatus, wherein the material to be processed is processed by being supplied to the peripheral wall portion.  The agitation processing apparatus according to claim 1, wherein a gas ejection hole is provided in a lower portion of the container body. The container body is connected to a heat medium supply pipe, a jacket is provided, the gas supply pipe is communicated with an inert gas supply pipe, the unloader and the stirring mechanism are provided in the container body in an airtight manner, and a material to be processed is provided. The agitation processing apparatus according to claim 1 or 2, which is mixed or dried.  The stirring treatment apparatus according to claim 1, wherein the exhaust device is a vacuum pump.

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