JP2006095437A - Vibration fluidizing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel vibration fluidizing device with a less required driving force of a vibrator (vibrating means) for the large output of which the size can be enlarged with respect to a vibration fluidizing device. <P>SOLUTION: In this vibration fluidizing device M, a vessel body 12 supports independently a member 16 integrating a vibration perforated plate 14 vibration-fluidizing powder (perforated plate integrated member) 16 and a vessel body excluding the integrated perforated plate (vessel body residual part) 26, and the integrated perforated plate 16 and the vessel body residual part 18 (26) are air-tightly connected by a bellows 22 in a vibration insulating manner. For example, the perforated plate integrated member 16 is formed of the vibration perforated plate 14, an air flow-in chamber 20 and the bottom part of a treating chamber 24 positioned at the upper part of the vibration perforated plate 14 and attached with a vibrating means (vibrating motor) at the outside. The upper part of the treating chamber 26 is the vessel body residual part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration flow device having a novel configuration and a humidity control / drying plant for a granular material using the vibration flow device.

  Vibration flow devices are widely used because of their good drying efficiency and easy humidity control (see Patent Document 1, Non-Patent Document 1, etc.).

However, it has been considered difficult to increase the size of the vibration flow device. As the weight increases, it is necessary to make the oscillator (oscillation means) have a large power (there are few vibration motors with large power), and the safety strength (including the case of resonance) due to vibration exceeds the weight increase. This is because it was necessary to design.
Japanese Patent No. 34399796 Kazuaki Isshiki "Chemical equipment March issue; Volume 35 issue No. 3" published on March 1, 1993, p.

  In view of the above, the inventors of the present invention provide a novel vibration flow device that requires less power for a large output oscillator (oscillation means) and can be enlarged in the vibration flow device. The purpose (problem).

  In order to solve the above-mentioned problems, the present inventors made independent efforts to make the vibrating perforated plate member in the vibratory flow device main body independent of the rest of the tank body of the vibratory fluidized tank (the tank main body remaining part) in the process of diligent development. The inventors have found that the above problems can be solved by supporting and isolating vibration, and have come up with a vibration flow device having the following configuration.

In the vibratory flow device equipped with a tank body that puts powder particles and vibrates and flows,
A member integrated with a vibrating perforated plate that vibrates and flows powder particles (hereinafter referred to as “porous plate integrated member”) and a tank body excluding the porous plate integrated member (hereinafter referred to as “tank main body remainder”). It is independently supported and is hermetically connected to the perforated plate integrated member and the remaining layer main body so as to be able to block vibration.

  The perforated plate integrated member is supported independently from the remainder of the tank body so that vibration can be isolated, and at least the upper part of the processing chamber does not need to be vibrated. For this reason, it is not necessary to use a vibration motor with a large output, and as a result, the design safety strength can be reduced. Therefore, it is possible to design a large-capacity vibration flow device that has been conventionally considered difficult or impossible from the viewpoint of the output of the oscillator (oscillating means) and the design safety strength.

  The connection capable of isolating vibration is usually a flexible cylinder. By using a flexible cylindrical body, the hermetic connection between the vibrating perforated plate and the remaining portion of the tank body can be facilitated, and replacement is also easy. It is also possible to form a multistage structure in which the tank body remaining portion (upper part of the processing chamber) located above the porous plate integrated member is further divided in the horizontal direction and connected by vibration damping means such as a hard bellows tube. . Then, a vibration part is formed also in the upper stage side, and it can be expected to contribute to the improvement of the fluidity of the upper part.

  The vibration flow device can have the following specific configuration, for example.

  The perforated plate integrated member is formed in the air inflow chamber located below the vibrating perforated plate and the lower part of the processing chamber located on the upper side of the vibrating perforated plate and to which the oscillating means is attached to the outside. It is formed in the upper part of the processing chamber connected through a cylindrical tube.

  And it is desirable to install the bag filter which protrudes in the tank main body at the upper exhaust port of the process chamber upper main body remainder. The powder particles adhered to the bag filter can be removed by reverse pressure, and the powder particles can be collected in the tank body without discharging the product (powder particles) to the outside. improves.

  And in each said structure, it is desirable to provide the structure which provided the several air blowing inlet with respect to the perforated board part of a perforated board integrated member, and was divided suitably corresponding to this air blowing inlet. Even if the area (flow area) of the vibrating perforated plate is large, the occurrence of a ubiquitous flow of air for flow can be suppressed and vibration fluidization is facilitated.

  In each of the above configurations, the stirring device is supported independently of the porous plate integrated member so as to have a stirring portion directly above the vibrating porous plate, and the porous plate integrated member and the stirring device are connected so as to be able to block vibration. It is desirable that The input raw material (powder body) can be pre-fluidized, and treatment such as drying / humidification becomes easy.

  It is desirable to dispose the granular material hitting means on each outer periphery of the porous plate integrated member and / or the remaining portion of the tank body above the porous plate integrated member. It becomes easy to collect the powder and the tank body can be easily cleaned.

  In the vibration and flow apparatus having the above-described configurations, the tank body is usually provided with temperature control means on the outside and / or inside. It is possible to improve the humidity conditioning / drying processing efficiency of the granular material.

  Moreover, the humidity control / drying plant using the vibration flow device having the above-described configurations has the following configuration.

  The bottom of the tank body and the gas transporter are connected via an air pipe provided with a humidifier and an air heater so that humidity control air can be fed into the lower part of the vibrating perforated plate in the vibration flow device having the above-described configurations. Connected. By adjusting the humidity of the flowing air, as described later, it is possible to perform high-level drying, and it can also be used as a humidity control device.

  In the humidity control / drying plant with the above configuration, the powder product after humidity control / drying can be sucked and discharged, and connected to the suction discharge pipe with the suction port directly above the vibrating perforated plate and the suction side of the pneumatic transporter. It is desirable that the product recovery cyclone be connected by a product recovery pipe having a flexible pipe. It is excellent in handling properties (handleability) when the granular product is a fine powder.

  By virtue of the configuration in which the vibrating porous plate integrated part and the tank body remaining part formed in the fluidized bed of the present invention are independently supported and both are vibrated and cut off, the following effects are obtained.

    1) The mass of the vibrating member can be reduced, and the power can be reduced.

    2) The risk of mechanical breakage can be reduced.

    3) The vibration flow device can be enlarged.

    4) Disassembly and cleaning of the device becomes easy.

    5) The equipment is also disassembled and installed, and the installation weight can be relatively small.

  Next, the present invention will be described in detail based on the best embodiment.

The overall configuration of the vibration and flow device of the present embodiment is as follows shown in FIGS. In the present embodiment, a case where the tank main body specification is about 3 m in total height, about 1.7 m in outer diameter, and about 8 m ³ in total capacity is mounted on a two-level structure base (the height on the second floor is about 3 m) will be described as an example. However, it is not limited to this.

  The vibration flow device M includes a member (hereinafter referred to as a “porous plate integrated member”) 16 in which a tank body 12 is integrated with a vibrating porous plate (dispersion plate) 14 that vibrates and flows powder particles, and the porous plate is integrated. A tank main body (hereinafter referred to as “tank main body remaining portion”) 18 excluding the members is independently supported, and the perforated plate integrated member 16 and the tank main body remaining portion 18 are interposed through a flexible cylindrical body 22 such as a bellows tube so that vibration can be cut off. Are connected hermetically.

  Specifically, the porous plate integrated member 16 is positioned on the lower side of the vibrating porous plate 14 and on the upper side of the vibrating porous plate 14, and an oscillation means (vibration motor) is attached to the outside. It is formed by the processing chamber lower part 24. The tank main body remaining portion 18 becomes the processing chamber upper portion 26.

  At this time, the volume ratio between the processing chamber lower portion 24 and the processing chamber upper portion 26 is not particularly limited, but a larger processing chamber upper portion 26 can use a relatively small oscillator. However, when processing a raw material having a high water content, it is desirable to make the processing chamber lower portion 24 larger than the processing chamber upper portion 26. This is because if the raw material having a high water content is added to the height of the processing chamber lower part 24 and the flexible cylindrical body (bellows tube) 22 or more, the vibrational fluidity of the upper part is lowered. In this case, the lower part of the processing chamber (perforated plate integrated member) 24 may be divided in the horizontal direction and may have a multistage structure connected by vibration damping means such as a hard bellows tube.

  At this time, the aperture ratio of the vibrating perforated plate and the size of each flow vent hole (small hole) vary depending on the type of raw material, but for example, the aperture ratio: 1 to 50% (preferably 5 to 10%), small Pore diameter: 1 to 100 μm (preferably 5 to 50 μm). If the opening ratio and the hole diameter are too small, it is difficult to obtain the amount of air necessary for flow and the pressure loss increases. In addition, if the aperture ratio is too large, it is necessary to thicken the vibrating perforated plate from the viewpoint of strength, and if the hole diameter is large, there is a risk of falling when the air feed to prevent the treated powder particles from falling is stopped. Therefore, it is necessary to always send in predetermined air, which increases the running cost.

  And in this embodiment, it is the structure by which the whole tank main body, ie, not only a surrounding wall but the bottom wall and the ceiling wall is covered with the temperature control jacket 28 which can pass warm water as a temperature control means. In addition, temperature control means such as a steam heating coil or a sheathed heater may be arranged further inside (inside). Then, in order to allow hot water to flow through the temperature control jacket 28 through the same path, the air inlet chamber 20 and the processing chamber lower portion 24 and the processing chamber lower portion 24 and the processing chamber upper portion 26 are respectively connected to the first The second flexible communication pipes (high pressure rubber hoses) 30 and 32 communicate with each other. In order to ensure sealing performance, the vibration porous plate 14 is sandwiched between the processing chamber lower portion 24 and the air inflow chamber 20 through gaskets 15 and 15. At this time, the perforated plate 14 has a configuration in which the perforated plate body is sandwiched between two flange portions in the illustrated example. The perforated plate body is made of, for example, a filter cloth, a sintered metal plate, a punching metal plate, a metal / resin net, or the like.

  The temperature adjustment jacket 28 has a hot water inlet 28a on the bottom side and a hot water outlet 28b on the ceiling side, and although not shown in the figure, porous diffusion is performed on the bottom side and the ceiling side so that the temperature adjustment water does not short pass each. A board is installed inside.

  Furthermore, the connection between the processing chamber lower portion 24 and the processing chamber upper portion 26 is not particularly limited in the present embodiment, and the flexible cylindrical body (flexible tube) 22 is not limited to a rubber tube, an internal coating cloth, and a bellows metal tube. Etc. are arbitrary. If a predetermined vibration can be cut off, it is also possible to connect with an elastic ring (ring-shaped vibration isolating rubber) instead of the flexible cylindrical body.

  The lower support frame 33 is formed by arranging lower support columns (circles) 33a at four corners of a square of about 2 m via a square base plate 33b and connecting the support columns 33a to each other by a channel 33c. And the lower spring seat 35 is formed in the upper surface of the lower support pillar (square pillar) 33a.

  On the other hand, on the peripheral wall of the processing chamber lower part 24, a set of two bracket reinforcing ribs 36c arranged radially at a spring receiving position between a substantially square bracket lower plate 36a and a ring-shaped bracket upper plate 36b. A support bracket 36 is formed. Upper spring seats 38 are formed at the four corners (spring receiving positions) of each bracket lower plate portion 36. A hanging metal fitting 39 is attached to each reinforcing rib 36c forming position of the bracket upper plate 36b.

  A support spring (support spring) 40 is interposed between the upper spring seat 38 and the lower spring seat 35. The support spring 40 is usually a compression coil spring, but may be formed of a leaf spring, an air spring, or a rubber elastic body.

  Further, a first electromagnetic hammer (maghammer) 46 for hitting the lower part of the lower part 24 of the processing chamber is attached to the lower base 33 through a hammer seat pillar 44 extending upward from a cross beam 42 extending from the lower support pillar 33a. It has been. This is because the granular material adhering to the inner wall is dropped (hereinafter, the operation of the maghammer is the same).

  A pair of vibration motors (oscillating means) 48 are attached between the spring receiving positions of the lower mounting bracket 36 of the lower portion 24 of the processing chamber via a portal motor seat 37 formed on the support bracket 36. Here, instead of the vibration motor (vibration motor type) 48, when the apparatus is small, an electromagnetic oscillator (electromagnetic vibration type) may be used.

  A product discharge member 50 is attached to the side wall of the processing chamber lower portion 24. The product discharge member 50 is connected to a suction port 50a located directly above the vibrating porous plate 14 and a product discharge port 50b by a connecting hose 50c. It is what has been.

  As shown in FIG. 4, the stirrer 52 includes a stirrer 52 (stirring blade in the illustrated example) 52a directly above the vibrating porous plate 14, and the stirrer 52 includes the porous plate integrated member 16 (in the air inflow chamber 20, in the illustrated example). The processing chamber lower portion 24 and the processing chamber upper portion 26) are supported independently (in the example, the second floor 2FL), and the porous plate integrated member 16 and the stirring device 52 are connected to each other by a bellows tube 52b so as to be able to block vibration. It can also be set as the structure which is. By doing so, even if the charged granular material contains agglomerates (aggregates), the pretreatment for unraveling the charged raw material can be performed in the lower part 24 of the processing chamber by stirring while applying a vibration force.

  On the other hand, the upper part 26 of the processing chamber is an upper support frame 54 composed of a square base plate 54a and an upper support column (cylinder) 54b formed on the second floor 2FL at square corners slightly smaller than the lower base 33 on the first floor 1FL. In addition, an upper mounting bracket 56 composed of a bracket horizontal plate portion 56a and a bracket rib reinforcement portion 56b having a substantially rectangular planar outer shape is coupled and supported on the side wall of the upper portion of the processing chamber 26. A second electromagnetic hammer (mag hammer) 58 is attached to the second floor 2FL for hitting the protruding side wall of the processing chamber lower part 24 from the second floor 2FL. Further, a third electromagnetic hammer 59 that hits the side wall of the processing chamber upper portion 26 is attached via the upper mounting bracket 56.

  A raw material input member (raw material input pipe) 60 is attached to the raw material input side of the processing chamber upper portion 26. A bag filter device 62 is mounted on the exhaust side of the processing chamber upper part 26 so that the filter main body 62 a protrudes into the processing chamber upper part 26. The bag filter device 62 includes a reverse-pressure air-type dropping means (high-pressure air tank 62b) so that the powder particles attached to the filter body can be dropped.

  In the above description, the air inflow chamber (bottom tank) 20 is a vibration porous plate integrated member forming portion that vibrates integrally with the processing chamber lower portion 24 integrated with the vibration porous plate 14, but the air inflow chamber 20 is also treated. As with the chamber upper part 26, as a separate support, the bottom tank may be vibration-isolated by a vibrating fluidized bed forming perforated plate and a bellows tube at the lower part of the processing chamber. Further, the bracket can be protruded outward from the vibrating perforated plate 14 to be supported by a spring and connected to the oscillating means (vibration generating means), and further, the vibration can be cut off from the upper tank body.

  The tank body and the vibrating perforated plate are preferably formed of a member that does not generate rust, such as a stainless steel plate, and the tank body is preferably covered with Teflon (registered trademark). This is from the viewpoint of preventing contamination of processed products.

  Next, the usage mode of the vibration flow device will be described with reference to the flowchart shown in FIG. 5 showing the humidity control / drying plant for granular materials.

  This humidity conditioning / drying plant is provided with a bottom side of the tank body 12 and a discharge gas transporter (push-in blower) 72 so that humidity conditioning / temperature-controlled air can be fed into the lower part of the vibrating perforated plate 14 of the vibration flow device M. Are connected via an air pipe 78 having a humidifier 74 and an air heater 76. In the humidifier 74, a first water circulation path 90 is formed between a bottom water storage part 74a and an upper watering part (spray pipe) 74b via a circulation pump 75 and a first hot water heater (for humidifier) 88. Yes. Further, similarly, a second water circulation path 92 is formed between the bottom water storage section 74a and the position directly above the water storage section, passing through the temperature control jacket of the vibration and flow device via the circulation pump 75 and the second hot water heater 92. Yes.

  In addition, the product recovery device connected to the suction / discharge pipe (product discharge member) 50 of the vibration flow device M and the suction side of the gas transporter 80 for exhaust so that the particulate product after humidity control / drying can be sucked and discharged ( Cyclone) 82 is connected by a product recovery pipe 86 having a flexible pipe 84. A product bagging portion 82b is provided on the lower side of the cyclone 82a of the product recovery device 82.

  For example, the humidity control / drying treatment of the granular material using this plant is performed as follows.

  First, the discharge gas transporter (push-in blower) 72 is operated, and air (air) having an appropriate humidity by the humidifier 74 is sent to the air heater 76. The humidity-controlled air sent to the air heater 76 is heated to an appropriate temperature, and flows into the air inflow chamber (bottom tank) 20 of the vibration fluidizer M through the pair of butterfly valves 96, 96.

  Also, the warm water is stored water at the bottom of the humidifier 74 via the circulation pump 75, one via the first warm water heater 88 to the shower part 74b of the humidifier 74, and the other is the second warm water. It is circulated through the heater 92 through the temperature control jacket 28 of the apparatus main body 12 and directly above the water storage part 74 a of the humidifier 74.

In this state, the vibration motor 48 is driven, and further, the granular material is charged into the processing chambers 24 and 26 from the raw material charging member 60. At this time, the vibration operation condition is appropriately selected within the range of vibration frequency: 1000 to 1500 min ⁻¹ and total amplitude: 2 to 8 mm, although it depends on the kind of raw material and the filling amount. Further, the raw material filling amount is set to about 1/3 to 1/2 of the volume of the processing chambers 24 and 26 depending on the kind of the raw material. If the filling amount is too large, it is difficult to form a vibrating fluidized bed, and if it is too small, the productivity is lowered. The height of the vibrating fluidized bed depends on the type and moisture content of the raw material, but is generally 1.2 to 1.5 times the height when the input raw material is allowed to stand.

  Then, the raw material is in a fluid state suitable for drying by the air flowing from the bottom side of the vibrating porous plate 14 and the vibration received from the porous plate 14. At this time, highly dry moisture (0.001% or less), which has been regarded as impossible in the past, is possible by setting the operating conditions as follows.

1) Initially, air with high humidity (temperature 20 to 100 ° C., humidity 20 to 80%) is blown (2000 to 5000 dm ³ / min per 1 m ^{3 of} raw material) to wet the surface of the dry raw material granules (10 to 12 h) )
2) Next, a minimum amount of hot air (temperature: 20 to 100 ° C., humidity: 10 to 50%) is blown (1000 to 3000 dm ³ / min per 1 m ^{3 of} raw material) and gradually dried. In this way, it can be gradually dried from the inside of the fine particles, and finally high drying is possible.

  When a large amount of dry air is used for drying instantaneously, a dry film is formed on the surface of the fine particles, the internal moisture does not evaporate, and high-level drying becomes impossible. On the other hand, with the surface of the particles moistened, the air volume can be reduced and the gradual drying can be performed, and high drying can be achieved.

By the way, 6 kg of wheat flour with a moisture content of 40% (humidity standard) is used with a vibration flow device (tank specification: 205φ500L, 5 μm perforated plate), frequency 1500 m ⁻¹ , total amplitude 3 mm, air volume (60 ° C., humidity) 60%) When a drying test was performed under the condition of 20 m ³ min ⁻¹ × 12 h, a highly dry product of 0.001% or less was obtained.

  When the drying is completed, the operation of the vibration fluidizer is stopped and the exhaust blower 80 is operated. Then, the product powder is packed in a bag by the product recovery device (cyclone) 82.

It is an elevation view which is a right diagonal arrow half view and a left left side half view of the vibration and flow device according to the embodiment of the present invention. FIG. 2 is a view taken along arrow 2 in FIG. 1 (upper support frame omitted). FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1 (lower support frame omitted). It is a schematic external view which shows another embodiment in the vibration flow apparatus of this invention. It is a humidity control / drying flow sheet incorporating the vibration flow device of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Tank main body 14 Vibrating porous plate 16 Porous plate integrated member 20 Air inflow chamber 22 Flexible cylinder 24 Lower processing chamber 26 Upper processing chamber 28 Temperature control jacket 48 Vibration motor (oscillator)

Claims (10)

In the vibratory flow device equipped with a tank body that puts powder particles and vibrates and flows,
A member integrated with a vibrating perforated plate that vibrates and flows powder particles (hereinafter referred to as “porous plate integrated member”), and the tank body excluding the porous plate integrated member (hereinafter referred to as “tank main body remainder”). Is independently supported, and the perforated plate integrated member and the tank body remaining portion are hermetically connected so as to be able to block vibration.   2. The vibration flow device according to claim 1, wherein the vibration-tight sealing connection is formed of a flexible cylindrical body.   The perforated plate integrated member is formed in an air inflow chamber located below the vibrating perforated plate, and a lower part of the processing chamber located above the vibrating perforated plate and having an oscillating means attached to the outside. 3. The vibration and flow device according to claim 2, wherein the remaining portion is formed at an upper portion of the processing chamber connected via a flexible cylindrical body.   4. The vibration and flow device according to claim 3, wherein the upper exhaust port in the upper part of the processing chamber is provided with a bag filter device provided with a reverse pressure air type wipe-out means.   5. The vibration and flow device according to claim 4, wherein the air inflow chamber includes a plurality of air blowing ports with respect to the perforated plate portion, and is appropriately partitioned in correspondence with the air blowing ports.   The stirring device is supported independently of the porous plate integrated member so as to have a stirring portion directly above the vibrating perforated plate, and the porous plate integrated member and the stirring device are connected so as to be able to block vibration. The vibration flow device according to claim 1, wherein the vibration flow device is provided.   The powder percussion means is disposed on each outer periphery of the perforated plate integrated member and / or the remaining portion of the tank main body above the perforated plate integrated member. Vibration fluid equipment.   The vibration flow device according to any one of claims 1 to 7, wherein the tank body includes temperature control means on the outside and / or the inside. A humidity control / drying plant for a granular material using the vibration and flow device according to claim 1,
Through the air pipe provided with a humidifier and an air heater, the bottom side of the tank body and the discharge gas transporter are capable of sending humidity-controlled air to the lower part of the vibrating perforated plate of the vibration flow device. A humidity control and drying plant for granular materials, characterized by being connected. Flexible suction and discharge pipe with a suction port directly above the vibrating perforated plate and product recovery cyclone connected to the suction side of the exhaust gas transporter to enable suction and discharge of powder products after humidity conditioning and drying 10. A powdery humidity conditioning / drying plant according to claim 9, wherein the plant is connected by a product recovery pipe having a conductive pipe.

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