JP2012081464A - Fluidized-bed apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluidized-bed apparatus in which a gas pulsating wave is used, the vibration of which is suppressed and the energy efficiency of which is improved.SOLUTION: The fluidized-bed apparatus includes: a fluidized-bed vessel 1; a plurality of gas supply chambers 2 (2b, 2c); a gas supply line 3; one pulsating wave production unit 4 interposed on the gas supply line 3; and a blower 6. The gas supply line 3 comprises an upstream-side gas supply line 3a arranged on the upstream side of the pulsating wave production unit 4, a first gas supply line 3b for connecting the pulsating wave production unit 4 to the gas supply chamber 2b, and a second gas supply line 3c for connecting the pulsating wave production unit 4 to the gas supply chamber 2c. The pulsating wave production unit 4 is operated so that flow passages are changed gradually from/to such a state that the upstream-side gas supply line 3a is communicated with only one of the first gas supply line 3b and the second gas supply line 3c to/from such a state that the upstream-side gas supply line 3a is communicated with only the other thereof via such a state that the upstream-side gas supply line 3a is communicated with both thereof. As a result, a first gas pulsating wave is produced in the first gas supply line 3b and a second gas pulsating wave is produced in the second gas supply line 3c. The first and the second gas pulsating waves are supplied to the fluidized-bed vessel 1 through the gas supply chambers 2b, 2c when the blower 6 and the pulsating wave production unit 4 are operated thus.

Description

  The present invention relates to a fluidized bed apparatus used when producing fine granules, granules and the like of pharmaceuticals, agricultural chemicals, foods and the like.

  In general, a fluidized bed apparatus forms a fluidized bed by floating and flowing powder particles in a fluidized bed container with a fluidized gas such as hot air introduced from the bottom of the fluidized bed container. A film agent solution, a binder solution, etc.) are sprayed to perform granulation or coating treatment.

  Further, in the above fluidized bed apparatus, in order to easily and efficiently produce a granulated product having uniform properties and a small specific volume, a granulation using air pulsation waves as a fluidized gas introduced from the bottom of the fluidized bed container is used. A grain method has been proposed (Patent Documents 1 to 3 below). For example, in Patent Document 3, in the fluidized bed apparatus, the bottom ventilation portion is divided into two regions, a central region and a peripheral region, and fluid flows into one or both of the air supply paths for supplying fluidized gas to each region. Pulsating wave generating means for converting the gas into a gas pulsating wave is provided.

Japanese Patent Laid-Open No. 10-329136 Japanese Unexamined Patent Publication No. 7-19728 JP 2008-229603 A

  However, when an air pulsating wave is used in the fluidized bed apparatus, vibration is generated in the fluidized bed apparatus due to the pulsating wave. Further, in the mechanism that generates the air pulsation wave, when the pulsation wave is generated, a part of the airflow from the upstream pipe is discharged, so that the energy efficiency of the fluidized bed apparatus is not good.

  In addition, when air pulsation waves are used in a fluidized bed apparatus with a conventional apparatus configuration, an air flow with a high wind speed is intermittently passed through a wide area ventilation section (so-called eye plate, ventilation board) In addition, there is a problem that drift (bias) of the ventilation air velocity is likely to occur. For the same reason, there is a problem that the powder layer (fluidized bed) is also likely to blow through. Also from this viewpoint, the energy efficiency of the fluidized bed apparatus is not good.

  In view of the above circumstances, an object of the present invention is to suppress vibrations and improve energy efficiency in a fluidized bed apparatus using gas pulsation waves.

  In order to solve the above problems, a fluidized bed apparatus of the present invention includes a fluidized bed container having a vent at the bottom, a plurality of air supply chambers provided at the lower part of the fluidized bed container, and connected to these air supply chambers. An air supply path, one pulsation wave generating means interposed in the air supply path, and a gas suction means connected to the fluidized bed container, wherein the air supply path generates the pulsating wave generation An upstream air supply path upstream of the means, a first air supply path connecting the pulsating wave generating means and a part of the air supply chamber, and connecting the pulsating wave generating means and the rest of the air supply chamber. The pulsating wave generating means includes a state in which the upstream air supply path communicates with only one of the first air supply path and the second air supply path; The first gas pulsation wave is generated in the first air supply path by operating so as to switch to the state of communicating only with the gas. In addition, a second gas pulsation wave is generated in the second air supply path, and the first and second gas pulsation waves are generated through the air supply chambers by the operation of the gas suction means and the pulsation wave generation means. It is supplied to the fluidized bed container.

  With this configuration, the first gas pulsation wave and the second gas pulsation wave are generated by distributing the airflow from the upstream air supply path by the pulsation wave generator. Accordingly, when the first gas pulsation wave and the second gas pulsation wave merge in the fluidized bed container, the air flow has a substantially constant wind speed. Therefore, it is possible to suppress the vibration caused by the pulsating wave in the downstream pipe after the fluidized bed container. This also reduces the load caused by pulsating waves in the downstream piping after the fluidized bed container, leading to improved durability.

  Further, all of the airflow that has entered the pulsating wave generator from the upstream air supply path is supplied to the fluidized bed container as pulsating waves. Therefore, most of the energy of the airflow flowing inside the upstream side air supply path can be utilized for floating and flowing the granular material in the fluidized bed container. That is, the energy efficiency of the whole fluidized bed apparatus can be improved.

Furthermore, since the area of the ventilation section that supplies pulsation can be reduced, the drift of the ventilation air speed is suppressed, and the fluidized bed is prevented from being blown out, thereby improving the drying capacity and the energy of the entire fluidized bed apparatus. Efficiency can be improved.

  The said structure WHEREIN: The partition plate which partitions off the said 1st gas pulsation wave and the said 2nd gas pulsation wave mutually in the said fluidized bed container shall be provided in the bottom part side of the said fluidized bed container.

  When such a partition plate is not provided in the fluidized bed container, the pulsating waves introduced from the respective air supply chambers into the fluidized bed container are likely to come into contact with each other in the fluidized bed container. The pulsating wave introduced from one side of the air supply chamber and the pulsating wave introduced from the other side of the air supply chamber are originally generated by the distribution of the air flow in the upstream air supply path. Counteract with each other. For this reason, it cannot be said that the pulsating wave introduced into the fluidized bed container from each air supply chamber is sufficiently utilized for floating and flowing the powdery raw material.

  On the other hand, if the partition plate as described above is provided in the fluidized bed container, the pulsating wave introduced from each air supply chamber into the fluidized bed container becomes difficult to contact in the fluidized bed container. . Therefore, the pulsating wave introduced from each air supply chamber into the fluidized bed container is effectively used to float and flow the granular material.

  Further, in any one of the above-described configurations, a communication path that connects the air supply chamber connected to the first air supply path and the air supply chamber connected to the second air supply path is provided. Can do.

  When the communication path is not provided, when one of the first air supply path and the second air supply path is not in communication with the upstream air supply path by the pulsation wave generating means, Airflow stops in the connected air supply chamber. For this reason, in the air supply chamber in which the airflow is stopped, there is a possibility that fine powder particles enter through the ventilation portion.

  On the other hand, if the communication passage is provided, even when the air flow stops in one of the air supply chambers, the air flow of the other air supply chamber is introduced into the one air supply chamber via the communication passage. . By this introduced air flow, it is possible to suppress the minute powder particles from entering the one air supply chamber.

  In any of the above-described configurations, the gas pulsation wave supplied from at least one supply chamber to the fluidized bed container may be configured to be ejected in an oblique direction with respect to a direction perpendicular to the ventilation portion. it can.

  When the gas pulsation wave is ejected in an oblique direction with respect to the direction perpendicular to the ventilation portion, the powder raw material is promoted to move or disperse in this ejection direction. Therefore, it is possible to float and flow the granular material efficiently by the gas pulsation wave. That is, the gas pulsation wave introduced from the air supply chamber into the fluidized bed container is effectively used to float and flow the granular material, thereby improving the energy efficiency of the fluidized bed apparatus as a whole. it can.

  Further, in this configuration, each gas pulsation wave supplied from the supply chambers adjacent to each other to the fluidized bed container is ejected in an oblique direction with respect to a direction perpendicular to the ventilation portion, and the ejection direction is It can be configured to be different from each other.

  If it is this structure, it can be expected that a granular material raw material moves to various directions, or disperses. Therefore, it can be expected that the granular raw material is suspended and flowed more efficiently by the gas pulsation wave, and the energy efficiency of the whole fluidized bed apparatus is improved.

  According to the present invention, in a fluidized bed apparatus using a gas pulsation wave, vibration can be suppressed and energy efficiency can be improved.

It is a figure which shows typically the example of 1 structure of the fluidized-bed apparatus which concerns on 1st Embodiment. It is a figure which shows the peripheral part of a pulsation wave generator. (A) is a figure which shows typically the principal part of the one structural example of the fluidized-bed apparatus which concerns on 2nd Embodiment, (b) shows the principal part of 1 structural example of the fluidized-bed apparatus which concerns on 3rd Embodiment. It is a figure shown typically. It is a cross-sectional view of the structural example of the air supply chamber in a fluidized bed apparatus. It is a cross-sectional view of the structural example of the air supply chamber in a fluidized bed apparatus. It is a figure which shows typically the modification of a structure of a fluidized bed apparatus. It is a figure for demonstrating the ejection direction to the fluidized bed container of a pulsation wave, (a) is a longitudinal cross-sectional view of a ventilation part periphery, (b) is a top view of a ventilation part. It is a top view of the ventilation part for demonstrating the ejection direction to the fluidized bed container of a pulsating wave. It is a top view of the ventilation part for demonstrating the ejection direction to the fluidized bed container of a pulsating wave.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a configuration example of a fluidized bed apparatus according to the first embodiment.

  The fluidized bed apparatus of this embodiment is connected to a fluidized bed container 1 having a ventilation part 1 a at the bottom, two air supply chambers 2 provided at the lower part of the fluidized bed container 1, and two air supply chambers 2. Supplied air path 3, one pulsating wave generator 4 as pulsating wave generating means interposed in the air supplying path 3, an exhaust path 5 connected to the upper part of the fluidized bed container 1, and an exhaust path And a blower 6 as a gas suction means connected to 5.

  The ventilation part 1a at the bottom of the fluidized bed container 1 is composed of a gas dispersion plate made of a perforated plate such as punching metal and a mesh, for example, and has a disk shape in this embodiment. A filter system 8 is installed in the upper space of the fluidized bed container 1, and a spray nozzle 9 for spraying a spray liquid, for example, a binder liquid, is installed in a space below the filter system 8.

  The two air supply chambers 2 are adjacent to each other via a partition plate 2a, and are hereinafter referred to as a first air supply chamber 2b and a second air supply chamber 2c.

  The air supply path 3 includes an upstream air supply path 3a upstream of the pulsating wave generator 4, and second and second air supply paths 3b and 3c on the downstream side. An air conditioner 7 that adjusts the temperature of gas, for example, air, an anemometer 10 that measures the speed of air, and an air supply damper 11 are interposed in the upstream air supply path 3a. One end of the upstream air supply path 3a is connected to the inlet 4a (see FIG. 2) of the pulsating wave generator 4, and the other end communicates with the atmosphere via a filter (not shown).

  One end of the first air supply path 3b is connected to the first discharge port 4b (see FIG. 2) of the pulsating wave generator 4, and the other end is connected to the first air supply chamber 2b. One end of the second air supply path 3c is connected to the second discharge port 4c (see FIG. 2) of the pulsating wave generator 4, and the other end is connected to the second air supply chamber 2c.

  The exhaust path 5 is connected to a space (exhaust chamber) above the filter system 8 of the fluidized bed container 1, and is connected to the blower 6 via the exhaust damper 12 and the dust collector 13.

  As shown in FIG. 2 in an enlarged manner, the pulsating wave generator 4 includes a casing 4d having a circular cross section having an inlet 4a, a first outlet 4b, and a second outlet 4c on the peripheral wall, and an inner surface of the peripheral wall of the casing 4d. And a rotary valve 4e that rotates in sliding contact. As described above, the upstream air supply path 3a is connected to the inlet 4a, the first air supply path 3b is connected to the first discharge port 4b, and the second air supply path 3c is connected to the second discharge port 4c. The The rotary valve 4e is rotationally driven by a driving means (not shown).

  By the rotation of the rotary valve 4e, the upstream air supply path 3a communicates only with the first air supply path 3b (the state of FIG. 2A), and the upstream air supply path 3a becomes the second air supply path 3c. And the state where only the upstream air supply path 3a communicates with the state where the upstream air supply path 3a communicates with the first and second air supply paths 3b, 3c, and the state where only the communication is established {the state shown in FIG. 2B} Switch over. During the gradual change from the state of FIG. 2A to the state of FIG. 2B, the gas flow from the upstream air supply path 3a gradually proceeds from the first air supply path 3b to the second air supply path 3c. Will be distributed. That is, in the state of FIG. 2A, the entire amount of the gas flow from the upstream air supply path 3a flows to the first air supply path 3b. From this state, the upstream side air supply is performed by the rotation of the rotary valve 4e. In a state where a part of the gas flow from the path 3a is gradually increased and distributed to the second air supply path 3c and the rotary valve 4e reaches the position of FIG. 2B, the upstream air supply path The total amount of gas flow from 3a flows to the second air supply path 3c. Further, during the gradual change from the state of FIG. 2B to the state of FIG. 2A, the gas flow from the upstream air supply path 3a is changed from the second air supply path 3c to the first air supply path 3b. Will be gradually distributed. That is, in the state of FIG. 2B, the entire amount of the gas flow from the upstream air supply path 3a flows to the second air supply path 3c. From this state, the upstream side air supply is performed by the rotation of the rotary valve 4e. In a state where a part of the gas flow from the path 3a is gradually increased and distributed to the first air supply path 3b and the rotary valve 4e reaches the position of FIG. 2 (a), the upstream air supply path The total amount of gas flow from 3a flows to the first air supply path 3b.

  By the operation of the pulsation wave generator 4 as described above, the gas flow from the upstream air supply path 3a flows into the first air supply path 3b as a first gas pulsation wave accompanied by a periodic air volume change. . That is, the wind speed of the gas flowing through the first air supply path 3b via the pulsating wave generator 4 is the largest in the state of FIG. 2A (maximum passing wind speed) and the smallest in the state of FIG. (Minimum passing wind speed), the maximum passing wind speed and the minimum passing wind speed appear continuously in a predetermined cycle according to the rotation of the rotary valve 4e.

Further, the flow rate of the gas flowing through the first air supply path 3b gradually changes between the maximum passing wind speed and the minimum passing wind speed, and according to the change in the wind speed of the first gas pulsation wave, the upstream air supply path. Part or all of the gas flow from 3a flows through the pulsation wave generator 4 to the second air supply path 3c. In other words, by the operation of the pulsation wave generator 4, the gas flow from the upstream air supply path 3a flows into the second air supply path 3c as a second gas pulsation wave accompanied by a periodic air volume change. . That is, the wind speed of the gas flowing through the second air supply path 3c via the pulsating wave generator 4 is the largest in the state of FIG. 2B (maximum passing wind speed) and the smallest in the state of FIG. (Minimum passing wind speed), the maximum passing wind speed and the minimum passing wind speed appear continuously in a predetermined cycle according to the rotation of the rotary valve 4e.

  In the above configuration, when the blower 6 and the pulsating wave generating device 4 are operated, the gas suction force by the blower 6 causes the exhaust path 5, the inside of the fluidized bed container 1, the first supply chamber 2b, the first supply path 3b, Via the path of the pulsating wave generator 4, the upstream of the exhaust path 5, the inside of the fluidized bed container 1, the second air supply chamber 2 c, the second air supply path 3 c and the path of the pulsating wave generator 4. It acts on the side air supply path 3a. And by the function of said pulsation wave generator 4, the 1st air supply chamber 2b is connected via the upstream air supply path 3a, the pulsation wave generator 4, and the 1st air supply path 3b and the 2nd air supply path 3c. The first gas pulsation wave and the second gas pulsation wave are supplied to the second air supply chamber 2c. Each of the first and second gas pulsation waves supplied to the first and second air supply chambers 2b and 2c is adjusted to a temperature of, for example, 25 to 200 ° C. by the air conditioner 7, and the air supply damper 11 and the exhaust gas are exhausted. The damper 12 is adjusted to an average passing wind speed of 0.25 to 1.5 m / sec, and the pulsating wave generator 4 is adjusted to a frequency of 0.5 to 5 Hz.

  The first and second gas pulsation waves supplied to the first and second air supply chambers 2b and 2c are ejected into the fluidized bed container 1 through the ventilation portion 1a, and powder is generated by the ejection of these gas pulsation waves. The granular material floats and flows in the fluidized bed container 1 to form a fluidized bed. And a binder liquid is sprayed from the spray nozzle 9 with respect to the fluidized bed of this granular material raw material. The granular raw material that has been sprayed with the binder liquid has a particle diameter that grows due to the bonding of the particles, and is dried by the first and second gas pulsation waves to become a granulated product having a predetermined particle diameter. .

  The first gas pulsation wave and the second gas pulsation wave introduced into the first air supply path 3b and the second air supply path 3c respectively distribute the airflow from the upstream air supply path 3a by the pulsation wave generator 4. It is caused by that. Therefore, when the first gas pulsation wave and the second gas pulsation wave introduced into the fluidized bed container 1 are merged in the fluidized bed container 1, an air flow having a substantially constant wind speed is obtained. Therefore, the vibration resulting from the pulsation wave in the downstream pipe after the fluidized bed container 1 can be suppressed. Moreover, since the load by the pulsation wave in the downstream piping after the fluidized bed container 1 is reduced by this, it leads to durability improvement.

  Further, a part or all of the gas flow from the upstream air supply path 3a is caused by the change in the wind speed of the gas pulsation wave flowing through one of the first air supply path 3b and the second air supply path 3c. The other inside flows as a pulsating wave through the pulsating wave generator 4. As a result, a gas pulsation wave is always introduced into the fluidized bed container 1. Therefore, a phenomenon in which an excessive negative pressure acts on the inside of the fluidized bed container 1 due to the gas suction force of the blower 6 can be prevented. Also by this, the vibration generated in the fluidized bed container 1 can be suppressed. Moreover, the load of the fluidized bed container 1 can be reduced and durability can be improved.

  Further, all of the airflow that has entered the pulsating wave generator 4 from the upstream air supply path 3 a is used as a pulsating wave and introduced into the fluidized bed container 1. Therefore, most of the energy of the airflow flowing in the upstream side air supply path 3a can be used to float and flow the granular material in the fluidized bed container 1. That is, the energy efficiency of the whole fluidized bed can be improved.

  Fig.3 (a) shows typically the principal part of one structural example of the fluidized-bed apparatus which concerns on 2nd Embodiment. This embodiment is different from the first embodiment in that a partition plate 1b is disposed above the ventilation portion 1a at the bottom of the fluidized bed container 1.

  The partition plate 1b is disposed so as to be flush with the partition plate 2a between the first supply chamber 2b and the second supply chamber 2c. In other words, the lower portions of the spaces in the fluidized bed container 1 partitioned by the partition plate 1b coincide with the upper portions of the first air supply chamber 2b and the second air supply chamber 2c, respectively.

  In the first embodiment, the fluidized bed container 1 is not partitioned in this way. For this reason, the first pulsating wave and the second pulsating wave introduced into the fluidized bed container 1 from the first air supply chamber 2b and the second air supply chamber 2c through the ventilation portion 1a are respectively generated in the fluidized bed container 1. It is easy to touch each other. The first pulsation wave introduced from the first supply chamber 2b and the second pulsation wave introduced from the second supply chamber 2c are originally generated by distributing the air flow in the upstream supply passage 3a. Therefore, they will cancel each other when they come into contact. For this reason, it cannot be said that the pulsating wave introduced into the fluidized bed container 1 from the first air supply chamber 2b and the second air supply chamber 2c is sufficiently utilized to float and flow the granular material.

  On the other hand, in the second embodiment, since the partition plate 1b is provided in the fluidized bed container 1, each of the first air supply chamber 2b and the second air supply chamber 2c passes through the ventilation portion 1a. The first pulsating wave and the second pulsating wave introduced into the fluidized bed container 1 are partitioned by the partition plate 1b. That is, the first pulsating wave and the second pulsating wave are unlikely to contact each other in the fluidized bed container 1. Therefore, the first pulsating wave and the second pulsating wave introduced into the fluidized bed container 1 are effectively used for floating and flowing the granular material. Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted.

  FIG.3 (b) shows typically the principal part of one structural example of the fluidized-bed apparatus which concerns on 3rd Embodiment. This embodiment is different from the first embodiment in that a partition plate 2a between the first supply chamber 2b and the second supply chamber 2c has a first supply chamber 2b and a second supply chamber 2c. A communication hole 2d is provided as a communication path that communicates with each other.

  As in the first embodiment, when the communication path that connects the first supply chamber 2b and the second supply chamber 2c to each other is not provided, the pulsation wave generator 4 causes the first and second When one of the two air supply paths 3b and 3c is not in communication with the first air supply path 3c, the airflow is stopped in the air supply chamber connected to the one air supply path. For this reason, in the air supply chamber where the air flow is stopped, there is a possibility that minute powder particles enter through the ventilation portion 1a.

  In contrast, in the third embodiment, since the communication plate 2a is provided with the communication hole 2d, the air flow in the other air supply chamber is communicated even when the air flow is stopped in one air supply chamber. It is introduced into one of the air supply chambers through the hole 2d. This introduced air flow suppresses minute powder particles from entering the air supply chamber on the side where the air flow is stopped. Since other configurations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted.

  In the first to third embodiments, the air supply chamber 2 has been described as two, that is, one first air supply chamber 2b and one second air supply chamber 2c. It is not limited. For example, 2n (even) air supply chambers 2 including n first air supply chambers 2b and n second air supply chambers 2c may be provided. Here, n is an integer, for example, 1 to 4, and 1 to 2 is preferable.

  As shown in FIGS. 4A to 4C, for example, the n first supply chambers 2b and the n second supply chambers 2c are provided with partition plates 2a so as to be radial in cross section. It may be formed by arranging a plurality (n = 2 in the same figure (a), n = 3 in the same figure (b), n = 4 in the same figure (c)). When the partition plates 2a are arranged in a radial manner in this way, the cross-sectional areas of the first air supply chamber 2b and the second air supply chamber 2c are made the same in order to equalize the effect of the air pulsation wave in the circumferential direction. The first supply chamber 2b and the second supply chamber 2c are preferably formed alternately in the circumferential direction. However, the present invention is not limited to this, and the cross-sectional areas of the first supply chamber 2b and the second supply chamber 2c may be different. Further, the first supply chamber 2b and the second supply chamber 2c need not be alternately arranged in the circumferential direction.

  In addition, the n first supply chambers 2b and the n second supply chambers 2c are divided so as to be concentric in cross section as shown in FIGS. 5 (a) to 5 (c), for example. 2a may be provided (n = 1 in the same figure (a), n = 2 in the same figure (b), n = 3 in the same figure (c)). When the partition plates 2a are arranged concentrically as described above, the first air supply chamber 2b and the second air supply chamber 2c are alternately formed in the radial direction in order to improve the effect of the air pulsation wave. It is preferable to do. Of course, the present invention is not limited to this, and the first supply chamber 2b and the second supply chamber 2c do not have to be alternately arranged in the radial direction.

  As shown schematically in FIG. 6, the piping for providing the n first supply chambers 2b and the n second supply chambers 2c includes a first supply passage 3b and a second supply passage 3c. Each of them may be branched into n pieces (n = 3 in the illustrated example).

  Here, the case where 2n (even) supply chambers 2 of n first supply chambers 2b and n second supply chambers 2c are provided has been described, but the present invention is limited to this. Without limitation, the first supply chamber 2b and the second supply chamber 2c may be an odd number in total. That is, in the present invention, it is only necessary that the first supply chamber 2b and the second supply chamber 2c are combined in plural.

  Further, when the first and second gas pulsation waves supplied from the first and second air supply chambers 2b and 2c to the fluidized bed container 1 are ejected into the fluidized bed container 1 through the ventilation portion 1a, Although it can be configured to eject in a direction perpendicular to the plate surface of the ventilation portion 1a, the present invention is not limited to this. For example, the first or second gas pulsation wave supplied from at least one supply chamber 2b, 2c to the fluidized bed container 1 is ejected in an oblique direction with respect to a direction perpendicular to the plate surface of the ventilation portion 1a. It may be configured. Usually, the ventilation part 1a is horizontal, and in that case, the first or second gas pulsation wave is ejected in an oblique direction with respect to the vertical direction.

  For example, as shown in FIG. 7, a case will be described in which the first and second supply chambers 2b and 2c are each one, and the partition plate 2a is disposed along the diameter of the ventilation portion 1a. In the illustrated example of FIG. 7A, each of the plurality of holes 1c formed in the ventilation portion 1a gradually approaches a plane passing through the center in the thickness direction of the partition plate 2a as it moves to the fluidized bed container 1 side. Thus, the plane is symmetrical with the plane as a plane of symmetry. As a result, the first and second gas pulsation waves supplied from the air supply chambers 2b and 2c to the fluidized bed container 1 are ejected in an oblique direction with respect to the direction perpendicular to the ventilation portion 1a. Specifically, as indicated by an arrow in FIG. 7B, the first gas pulsation wave supplied from the first air supply chamber 2b to the fluidized bed container 1 is ejected toward the partition plate 2a in plan view. To do. On the other hand, the second gas pulsation wave supplied from the second air supply chamber 2c to the fluidized bed container 1 is also ejected toward the partition plate 2a in plan view. That is, the first gas pulsation wave and the second gas pulsation wave are ejected in opposite directions in plan view.

  In this case, the granular material in the left and right regions corresponding to each of the first and second air supply chambers 2b and 2c floats and flows while changing places. Therefore, the first and second gas pulsation waves are effectively used to float and flow the powder material, and the energy efficiency of the entire fluidized bed apparatus can be improved.

  Further, as shown by arrows in FIG. 8A, the first gas pulsation wave and the second gas pulsation wave are configured to be jetted in opposite directions along the partition plate 2a in a plan view. Also good. In this case, the first gas pulsation wave and the second gas pulsation wave each collide with the peripheral wall of the fluidized bed container 1 and then move along the peripheral wall. As a result, the granular material in the left and right regions corresponding to each of the first and second air supply chambers 2b and 2c float and flow while changing places with each other while moving so as to form a swirling flow. Therefore, the energy efficiency of the whole fluidized bed apparatus can be improved as described above.

  In the case where the first and second supply chambers 2b and 2c have the configuration shown in FIG. 4A, as shown by arrows in FIG. 8B, the first gas pulsation wave and the second gas pulsation wave are It can comprise so that it may eject along the circumferential direction in the ventilation | gas_flowing part 1a by planar view. If it is this structure, the granular material raw material of each area | region corresponding to each of the 1st and 2nd air supply chambers 2b and 2c will carry out a floating flow, changing a place mutually while moving so that a swirl | flow may be formed. . Therefore, the energy efficiency of the whole fluidized bed apparatus can be improved as described above. In the configurations of FIGS. 4B and 4C, the same effect can be enjoyed if configured in the same manner.

  When the first and second air supply chambers 2b and 2c have the configuration shown in FIG. 5A, the second gas supplied from the second air supply chamber 2c is indicated by an arrow in FIG. 9A. The pulsating wave can be configured to be ejected radially inward in the ventilation portion 1a in a plan view. On the other hand, the first gas pulsation wave supplied from the first supply chamber 2b is configured to be ejected in a direction perpendicular to the ventilation portion 1a in this illustrated example. As a result, the powdery raw material moves from the outside in the radial direction to the inside in the vicinity of the aeration part 1a of the fluidized bed container 1, and accordingly, the part separated from the aeration part 1a of the fluidized bed container 1 from the inside in the radial direction. The granular material moves to the outside and floats and flows so that the granular material circulates as a whole. Therefore, the energy efficiency of the whole fluidized bed apparatus can be improved as described above.

  When the first and second supply chambers 2b and 2c have the configuration shown in FIG. 5B, the first gas pulsation wave and the second gas pulsation wave are ejected as shown by arrows in FIG. 9B. Can be configured to. That is, the second gas pulsation wave supplied from the second air supply chamber 2c is ejected radially inward in the ventilation portion 1a in plan view. The first gas pulsation wave supplied from the first supply chamber 2b on the center side of the ventilation portion 1a is ejected in a direction perpendicular to the ventilation portion 1a. On the other hand, the first gas pulsation wave supplied from the first air supply chamber 2b formed between the two second air supply chambers 2c is ejected toward the outside in the radial direction in the ventilation portion 1a in a plan view. Thereby, the granular material raw material of the radial direction outer side and radial direction inner side of the fluidized-bed container 1 carries out a floating flow, changing a place mutually. Therefore, the energy efficiency of the whole fluidized bed apparatus can be improved as described above. Even in the configuration of FIG. 5C, the same effect can be obtained if the configuration is the same.

  When the first and second supply chambers 2b and 2c have the configuration shown in FIG. 5B, the first gas pulsation wave and the second gas pulsation wave are indicated by arrows in FIG. 9C. Can be configured to erupt. The difference from the configuration shown in FIG. 9B is that the first gas pulsation wave supplied from the first air supply chamber 2b formed between the two second air supply chambers 2c has a diameter in the ventilation portion 1a. It is a point that spouts inward. In this case, as in the case of the configuration shown in FIG. 9A, the powder raw material floats and flows so as to circulate. Therefore, the energy efficiency of the whole fluidized bed apparatus can be improved as described above. Even in the configuration of FIG. 5C, the same effect can be obtained if the configuration is the same.

  In addition, in each example demonstrated based on FIGS. 7-9, if the number of the 1st and 2nd air supply chambers 2b and 2c is increased, dispersion | distribution accompanying the movement of a granular material raw material will be accelerated | stimulated. Therefore, the first and second gas pulsation waves are effectively used to float and flow the powder material, and the energy efficiency of the entire fluidized bed apparatus can be improved.

  The present invention is not limited to the above description, and various modifications are possible within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Fluidized bed container 1a Ventilation part 1b Partition plate 2 Air supply chamber 2a Partition plate 2b 1st air supply chamber 2c 2nd air supply chamber 2d Communication hole 3 Air supply path 3a Upstream air supply path 3b 1st air supply path 3c 1st 2 Air supply path 4 Pulsating wave generator 5 Exhaust path 6 Blower (gas suction means)

Claims (5)

A fluidized bed container having a ventilation part at the bottom, a plurality of air supply chambers provided in the lower part of the fluidized bed container, an air supply path connected to these air supply chambers, and an air supply path A single pulsating wave generating means, and a gas suction means connected to the fluidized bed container,
The air supply path includes an upstream air supply path upstream of the pulsating wave generating means, a first air supplying path connecting the pulsating wave generating means and a part of the air supply chamber, and the pulsating wave generating means. And a second air supply path connecting the remainder of the air supply chamber,
The pulsating wave generating means switches between a state in which the upstream air supply path communicates with only one of the first air supply path and the second air supply path and a state in which the upstream air supply path communicates only with the other. By operating as described above, the first gas pulsation wave is generated in the first air supply path, and the second gas pulsation wave is generated in the second air supply path,
The fluidized bed apparatus according to claim 1, wherein the first and second gas pulsation waves are supplied to the fluidized bed container through the air supply chambers by the operation of the gas suction means and the pulsation wave generation means.   The fluidized-bed apparatus of Claim 1 which provided the partition plate which partitions off the said 1st gas pulsation wave and the said 2nd gas pulsation wave mutually in the said fluidized-bed container in the bottom part side of the said fluidized-bed container.   3. The fluidized bed apparatus according to claim 1, further comprising a communication path that connects the air supply chamber connected to the first air supply path and the air supply chamber connected to the second air supply path.   The gas pulsation wave supplied from at least one air supply chamber to the fluidized bed container is ejected in an oblique direction with respect to a direction perpendicular to the ventilation portion. Fluidized bed apparatus as described.   Each gas pulsation wave supplied to the fluidized bed container from mutually adjacent air supply chambers is ejected in an oblique direction with respect to a direction perpendicular to the ventilation portion, and the ejection directions are different from each other. The fluidized bed apparatus according to claim 4.

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