JP2006266552A - Drying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying apparatus capable of preventing thermal denaturation of a treated material, and capable of rapidly and sufficiently drying the treated material. <P>SOLUTION: A drier 14 is equipped with an inverted conical drying chamber 151, and the drying apparatus 1 includes the drier 14 equipped with a hot blast supplying pipe 143 as a hot blast circling means for generating hot blast circling and rising inside the drying chamber 151, and a chain 154 fixed on a rotary shaft 152 rotating to the opposite direction from the hot blast. The hot blast supplying pipe 143 blows the hot blast from a tangential direction of a circular outer end of a drier body 142. Thus, a hot airstream cyclone circling and rising is formed in the drying chamber 151. The treated material rides on the flow of the hot airstream cyclone, and is crushed by the chain 154 confronted to the hot airstream cyclone, and is rapidly dried. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drying apparatus including a dryer having a crushing mechanism, and more particularly to a drying apparatus including a dryer that dries while dropping an organic residue containing moisture.

  2. Description of the Related Art Conventionally, a dryer having a cylindrical dryer body and a heat supply means is known as a dryer for drying food and feed, or organic residues discharged from various factories. For example, Patent Document 1 discloses a dryer including an inverted conical dryer body whose diameter decreases toward the bottom of the dryer, and heat supply means for heating the inside of the dryer.

  In the dryer disclosed in Patent Document 1, the treatment tank provided inside the dryer body is covered with a jacket, and a heating medium such as hot air is supplied from the heat supply means between the treatment tank and the jacket. This is an indirect heating type dryer that heats the inside of the treatment tank and dries the object to be treated. A rotating shaft extending in the vertical direction and a rotating blade fixed to the rotating shaft are provided in the treatment tank of the dryer.

  In the dryer, the object to be processed is supplied into the treatment tank from the upper side of the dryer, and is heated and dried while dropping in the treatment tank in the vertical direction. Since the material to be treated is crushed and broken into pieces by the rotary blades provided inside the treatment tank while falling inside the dryer, it is possible to efficiently dry even the material to be treated that is subjected to a drying process in a lump. Can do.

Further, Patent Document 2 discloses, as an apparatus for drying general waste including raw garbage discharged from a household, a dryer in which a hot air supply means is connected to a substantially cylindrical dryer body, and a downstream of the dryer. And a cyclone is disclosed. Inside the dryer of this drying device is provided a blow crushing chain fixed to the rotating shaft, and the general waste thrown in from the top of the dryer is blown down and crushed while being supplied from the hot air supply means. Dried with hot air.
JP 2002-204970 A JP 2002-11365 A

  However, the dryer of patent document 1 is an indirect heating system, and its thermal efficiency is bad. Moreover, since a heating medium is supplied from the lower part of the dryer main body made into the shape of a mortar, the to-be-processed object is exposed to high temperature in contact with an outer wall at the process tank lower part side. For this reason, when a to-be-processed object contains the substance which denatures easily with a heat | fever, the property of a to-be-processed object may be changed. Furthermore, when the object to be processed is relatively small in particle size, such as teacup or okara, the object to be processed adheres to the rotor blades provided to crush the object to be processed. However, there is also a problem that it takes time to peel off the deposits.

  On the other hand, the drying device of Patent Document 2 is for throwing out general waste in a garbage bag and crushing and drying, and the object crushed by the striking chain is blown from the lower part of the substantially cylindrical dryer body. However, the behavior of hot air inside the drying chamber is not controlled. For this reason, it is difficult to dry a substance used as food or the like with high quality even though the object to be treated is not efficiently contacted with hot air and drying is not sufficient and waste can be reduced. there were.

  This invention is made | formed in view of the said subject, and it aims at providing the drying apparatus provided with the dryer which prevents the thermal denaturation of a to-be-processed object and can dry a to-be-processed object quickly and fully.

  The present invention is a dryer having an inverted conical drying chamber, which is fixed to a hot air swirling means for generating hot air that swirls and rises inside the drying chamber, and preferably a rotating shaft that rotates in a direction opposite to the hot air. A drying apparatus is provided that includes a dryer having a chain. More specifically, the present invention provides the following.

  (1) A dryer body in which a drying chamber having a substantially cylindrical shape with one end face as a ceiling and the other end face as a bottom is formed, and hot air generating means for generating hot air supplied to the drying chamber of the dryer body. The dryer further includes hot air swirling means for raising the hot air while swirling the interior of the drying chamber, and the dryer body is disposed inside the drying chamber. A drying apparatus comprising: a rotary shaft that is provided and extends from the bottom side to the ceiling side; a chain having one end fixed to the rotary shaft; and a rotating means that rotates the rotary shaft.

  The dryer according to the present invention is a hot air drying type dryer in which a space provided in the inside of the dryer body is used as a drying chamber, and a drying process is performed with the drying chamber as a drying atmosphere by blowing hot air into the drying chamber. . The outer shape of the dryer main body is not particularly limited, and for example, the outside of the cylindrical container may be covered with a heat insulating material having an arbitrary shape.

  The shape of the drying chamber is a substantially circular cylindrical shape that is long in the direction perpendicular to the installation surface (ground) of the dryer body. In addition, a shape in which one side edge is narrowed toward the tip is included. Examples of the shape in which the one side edge of the cylinder becomes narrower toward the tip include a substantially conical shape.

  The dryer is installed with one of the opposite end faces of the drying chamber as the ceiling and the other as the bottom, and the processing object supplied from the supply port provided on the ceiling side of the drying chamber is dried with hot air while dropping in the drying chamber. . The supply port may be provided on the side close to the ceiling of the cylindrical side wall constituting the drying chamber, or may be provided on a cylindrical end surface serving as the ceiling. On the other hand, the hot air vent is preferably provided on the bottom side of the cylindrical side wall in order to easily generate hot air that swirls and rises in the drying chamber (hereinafter referred to as “hot air cyclone”).

  A rotation shaft substantially perpendicular to the ground is provided at the approximate center in the drying chamber, and one end of the chain is fixed to this rotation shaft. The chain is preferably provided in multiple stages at different positions in the length direction of the rotating shaft. Further, a plurality of chains may be provided at the same position in the length direction of the rotating shaft, and in this case, the plurality of chains are preferably fixed at equal intervals. That is, for example, when two chains are fixed at the same position, they are preferably provided at positions facing each other with the rotating shaft in between, and when three chains are provided at the same position, it is preferably provided at 120 ° intervals. In addition, the chain is preferably about 2 to 15 mm shorter than the length from the rotating shaft to the side wall of the drying chamber, particularly about 5 to 10 mm, and is preferably 5 to 50 cm when provided in multiple stages along the longitudinal direction of the rotating shaft. .

  The rotating shaft is connected to rotating means for rotating the rotating shaft so as to be switchable in the same direction, the reverse direction, or the forward / reverse direction with respect to the turning direction of the hot air current cyclone. In particular, the rotating means preferably rotates the rotating shaft in the direction opposite to the turning direction of the hot air cyclone, and can be constituted by a driving means such as a motor.

  As the hot air swirl means, there is a hot air supply pipe connected so as to extend in the tangential direction of the outer peripheral circle on the drying chamber bottom side.

  According to the present invention, the hot air stream which is broken up by hitting and crushing the workpiece supplied from the upper part of the dryer with a rotating chain and swirling along the wall surface of the drying chamber and rising inside the drying chamber. Contact with cyclone. In the present invention, since the hot air is swirled in the drying chamber, the object to be processed is easily broken into pieces by the chain, and the contact efficiency with the hot air is high. Therefore, according to this invention, a to-be-processed object can be dried efficiently in a short time.

  Since the chain is easier to rotate than a plate-like rotary blade and can be rotated at a high speed, the workpiece can be broken into pieces in a short time. Also, if the rotation of the rotating shaft is stopped, the chain hangs along the rotating shaft, so that it can be cleaned together with the rotating shaft by pouring a cleaning liquid on the rotating shaft. The need to wash each of them becomes unnecessary.

  Furthermore, in the present invention, the object to be processed is supplied from the upper part of the dryer and is fragmented and dropped in the drying chamber, so that the object to be processed fragmented in a moisture-containing state has a high temperature supplied from the lower part of the drying chamber. It is dried in a short time in contact with hot air, and the temperature of the hot air is lowered. On the other hand, the object to be processed, which has been dried and has a reduced specific gravity, is blown up to the upper part of the drying chamber by a hot air cyclone, and is reliably dried while staying in the upper part of the drying chamber for about 2 to 30 minutes. Here, since the temperature of the hot air on the upper side of the drying chamber is lowered, the object to be processed is prevented from being thermally denatured by being exposed to the hot air for a long time. Therefore, the present invention can be particularly suitably used for drying organic residues such as teacups, okara, and shochu squeezed rice cakes that are reused as objects to be processed.

  In this specification, “organic residue” means reused as feed or industrial raw materials such as tea residue, coffee bean cake, shochu rice cake, beverage manufacturing residue such as sake lees, food residue such as okara and vegetable waste, etc. It shall mean possible organic waste. The present invention is particularly suitable for drying to recycle the organic residue, but the object to be treated is not limited to the above organic residue, and raw materials such as food, feed and medicine can be dried, It is not excluded to dry organic waste such as organic sludge generated by biological treatment of raw garbage and wastewater, and inorganic waste such as bottom mud as the object to be treated.

  (2) The drying apparatus according to (1), wherein the drying chamber has an inverted conical shape in which a bottom end edge of a cylinder is narrowed.

  According to the present invention, since the shape of the drying chamber is an inverted conical shape that narrows toward the bottom side into which hot air is blown, a hot airflow cyclone rising from the bottom side can be easily created.

  (3) The drying chamber is provided on the ceiling side and supplied with an object to be processed, an exhaust port that is provided on the ceiling and discharges gas in the drying chamber, and the hot air generation is provided on the bottom side of the side wall. A hot air outlet through which hot air supplied from the means is blown, and the hot air swirling means is connected to the hot air generating means and the hot air outlet of the drying chamber, and is tangent to the outer edge of the dryer main body that is substantially circular The drying apparatus according to (1) or (2), which is a hot air supply pipe extending in a direction.

  In the invention described in (3), the hot air supply pipe extends in the tangential direction of the substantially circular outer edge of the dryer main body. That is, in the present invention, the hot air supply pipe is attached in an eccentric state with respect to the drying chamber having a substantially circular horizontal cross section, so that the hot air swirls and rises along the outer wall of the substantially circular drying chamber. Therefore, according to the present invention, it is possible to simplify the configuration of the dryer and generate a hot air current cyclone without providing a rotating means inside the dryer body or the drying chamber. In particular, it is preferable that the shape of the drying chamber is a substantially conical shape whose diameter increases toward the upper side, because the swirling hot air flow is likely to rise.

  (4) The drying device according to any one of (1) to (3), wherein the rotation unit includes a speed switching mechanism that changes a rotation speed of the rotation shaft.

  The speed switching mechanism is preferably capable of changing the operating speed in two or more stages. The rotation speed of the rotating shaft is preferably set to a high speed rotation of 300 to 600 rpm during normal processing, and a slow operation of 30 to 100 rpm is preferable when the object to be processed attached to the side wall of the drying chamber is peeled off. By providing the speed switching mechanism in this manner, the height of the tip of the rotating chain can be changed by rotating the rotating shaft at a slow speed, so that the deposits attached to the side wall of the drying chamber can be easily peeled off.

  The rotating means preferably rotates the rotating shaft in the direction opposite to the turning direction of the hot air cyclone, and it is preferable that the rotating direction of the rotating shaft can be switched between forward and reverse. By rotating the rotating shaft in the direction opposite to the swirling direction of the hot-air cyclone, the contact efficiency between the workpiece flowing along the hot-air cyclone flow and the chain rotating opposite the hot-air cyclone increases. The to-be-processed object can be dried more rapidly.

  (5) The drying device according to any one of (1) to (4), wherein the rotation unit includes an upper rotary blade fixed to a ceiling side end of the rotation shaft.

  The rotary shaft may also be provided with an upper rotor blade that generates a swirling flow upward on the ceiling side end portion side. The upper rotor blade is preferably rotated in the same direction as the rotation axis, particularly in the direction opposite to the swirling direction of the hot air cyclone, so as to generate a discharge air swirling in the direction opposite to the hot air cyclone. In addition, in the upper part of the drying chamber, in order to efficiently suck and discharge the discharged airflow with dust, an umbrella-shaped hood that opens downward and opens in the drying chamber and an exhaust pipe that is connected to this hood and extends to the outside through the exhaust port Are preferably provided.

  (6) The drying apparatus according to any one of (1) to (5), wherein the rotating unit includes a lower rotary blade fixed to a bottom side end of the rotating shaft.

  Furthermore, it is preferable to provide a lower rotating blade on the bottom side of the drying chamber on the rotating shaft. The lower rotor blade is rotated when the object to be processed accumulates at the bottom of the drying chamber due to the operation of the dryer being stopped, etc., to crush the aggregated object to be processed and generate an upward air flow Thus, the object to be processed deposited on the bottom of the drying chamber is raised. The lower rotor blade only needs to be rotated when deposits are deposited on the bottom of the drying chamber, and may be configured to move without interlocking with the rotating shaft so as not to hinder the flow of the hot air cyclone. preferable.

  (7) The drying chamber is provided on the ceiling side and supplied with an object to be processed; an exhaust port provided on the ceiling for exhausting gas in the drying chamber; and a hot air generation provided on the bottom side of the side wall And a dehydrator connected to the supply port of the drying chamber and dehydrated to be processed and supplied to the drying chamber (1). ) To (6).

  It is preferable that the material to be treated is dehydrated before being supplied to the dryer to reduce the water content. In the invention described in (7), a dehydrator is provided upstream of the dryer to supply the outlet of the dehydrator and the drying chamber. Connect the mouth. The object to be processed, which has been squeezed and dehydrated by the dehydrator, is agglomerated and supplied from the supply port of the dryer to the inside of the drying chamber. In the present invention, since a chain that rotates at high speed is provided inside the drying chamber, The object to be processed is quickly broken into pieces.

  (8) The drying chamber is provided on the ceiling side and supplied with an object to be processed; an exhaust port provided on the ceiling for exhausting gas in the drying chamber; and the hot air generation provided on the bottom side of the side wall And an exhaust pipe provided with a hood connected to the exhaust port and extending into the drying chamber and having a widened tip, and exhausted from the drying chamber connected to the exhaust pipe. Any one of (1) to (7), further comprising a dust separator provided with dust separation means for separating the dust and the gas contained in the generated gas and discharging the moisture-containing gas from which the dust has been removed A drying apparatus according to claim 1.

  Since the dried processed product obtained by drying the object to be processed together with the exhaust gas containing moisture is discharged as dust from the dryer, a dust separator is provided at the subsequent stage of the dryer to separate dust and gas. Is preferred. The dust separator can be composed of a cyclone separator in which exhaust gas swirls and descends in the separation chamber. The cyclone separator is composed of a main body having a separation chamber in which gas and dust are separated, a collecting tank connected to the lower part of the main body to accumulate dried processed products, and a moisture-containing air connected to the upper part of the main body to remove dust. It is preferable to provide a moisture-containing gas pipe for discharging the body.

  (9) The apparatus further comprises a dehumidifier provided downstream of the dust separation means to obtain a dry gas by cooling and dehumidifying the moisture-containing gas, and the dehumidifier and the hot air generating means are discharged from the dehumidifier The drying apparatus according to (8), wherein the drying apparatus is connected by a gas circulation pipe for circulating the dried gas to the hot air generating means.

  In the invention described in (9), a dehumidifier for removing moisture from the moisture-containing gas is provided at the subsequent stage of the dust separator, and most of the dry gas dehumidified by the dehumidifier is circulated to the hot air generating means. That is, a part of the dry gas may be discharged out of the system of the drying apparatus and a part of the external air may be newly supplied to the hot air generating means, but most of the dehumidified dry gas (for example, 90 to 90%). 99% by volume) is preferably circulated to the hot air generating means. Such circulation is particularly effective when it contains components that are oxidized and deteriorated by air or heat.

  As described above, the gas used in the dryer is circulated in the dryer using the drying device as a substantially closed system, thereby reducing the oxygen content of the gas supplied to the dryer and preventing oxidation of the workpiece. . In addition, since the gas with a constant temperature and humidity can be supplied to the hot air generating means throughout the year regardless of changes in the temperature and humidity of the outside air, the amount of energy required to heat the gas with the hot air generating means must be reduced. Can do. Furthermore, since the temperature and humidity of the hot air supplied from the hot air generating means are stable throughout the year, the properties of the workpiece are stabilized. Also, the working environment is improved without discharging fine dust.

  (10) A dryer body in which a drying chamber having a substantially cylindrical shape with one end face as a ceiling and the other end face as a bottom is formed therein, and hot air generating means for generating hot air supplied to the drying chamber of the dryer body. , A drying process product for supplying a processed product containing moisture to the drying chamber of the dryer, and drying the processed product to obtain a dried process product. A chain attached to a rotating shaft extending from the ceiling to the ceiling side is rotated in a predetermined direction, and a hot air cyclone that rises in the drying chamber is formed while the hot air swirls in a direction opposite to the rotation direction of the chain, thereby forming the drying A method for producing a dried processed product, wherein the processed product is supplied from a ceiling side of the chamber.

  According to the invention described in (10), the processed material is dried quickly, sufficiently dried so that the water content is about 5 to 15% by weight, and further, heat-treated by a hot air tube tank is suppressed. Is obtained.

  ADVANTAGE OF THE INVENTION According to this invention, a to-be-processed object can be dried easily and rapidly, preventing the thermal denaturation of a to-be-processed object, and a high quality dry-processed object can be obtained.

  Hereinafter, the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic view of a drying apparatus 1 according to an embodiment of the present invention. The drying apparatus 1 includes a dehydrator 12, a dryer 14, a dust separator 16, and a dehumidifier 18 connected in this order. As shown in FIG. 1, the dryer 14 has a drying chamber 151 formed in a substantially conical shape by constricting one end of the cylinder. The dryer 14 is an inverted cone type that is installed in a state where the cone is inverted with the one side end portion side of the drying chamber 151 being the bottom side. Hereinafter, terms indicating directions such as up, down, left, and right are used for convenience on the basis of the case where the dryer 14 is installed in this state. Moreover, the same code | symbol is attached | subjected to the same member and description is abbreviate | omitted or simplified.

  The dehydrator 12 includes a hopper 121 and a dehydrator main body 122 that is connected to the hopper 121 and includes a screw 126 inside. The hopper 121 is supplied with teacups and the like generated during the tea beverage production process as a processing object from a supply mechanism 125 constituted by a belt conveyor or the like. The object to be processed supplied to the hopper 121 is sent to the dehydrator main body 122 by a predetermined amount by natural dropping or a screw (not shown) provided in the hopper 121.

  In the present embodiment, the dehydrator main body 122 includes a substantially cylindrical inner space extending in the horizontal direction, and a screw 126 provided in the inner space is connected to driving means 127 such as a motor. The object to be processed supplied to the dehydrator main body 122 is squeezed and dehydrated while the object to be processed is moved from one end side to the other end side when the screw 126 is rotated by the driving means 127. In this embodiment, the dehydrator 12 is configured as a screw press type dehydrator. However, the dehydrator 12 is not limited to this, and for example, centrifugal filtration type and centrifugal sedimentation type centrifugal dehydrators, belt press type dehydrators, and Any dehydrator such as a filter press mold can be used.

  A mesh body 128 is provided below the screw 126, and the dehydrated filtrate dehydrated from the object to be processed passes through the mesh body 128 and is discharged from the drain outlet 129. On the other hand, the dehydrated material is supplied in a lump form to the dryer 14.

  FIG. 2 is a perspective view showing the internal configuration of the dryer 14. The dryer 14 includes a dryer main body 142, hot air generating means 141 connected to the dryer main body 142, and hot air supply pipes 143 as hot air swirling means. Inside the dryer main body 142 is formed a drying chamber 151 composed of a substantially cylindrical upper drying chamber 151a and a substantially conical lower drying chamber 151b. The hot air generating means 141 includes a heater 131 that indirectly heats a gas, and a fan 132 that is a blower that sends hot air heated by the heater to the drying chamber 151.

  The hot air generating means 141 is connected to a hot air supply pipe 143 located on the opposite side of the fan 132 with the heater 131 interposed therebetween, and the hot air heated by the heater 131 is blown into the drying chamber 151 by the fan 132. The hot air supply pipe 143 extends in the tangential direction of the substantially circular outer edge of the dryer main body 142 in the vicinity of the lowermost portion of the lower drying chamber 151b which is shaped like a mortar in this embodiment. That is, the hot air supply pipe 143 is connected to supply hot air to a position that is biased toward the wall side from the vertical center line of the drying chamber 151.

  The drying chamber 151 has a supply port 155 on the side wall on the side with the larger horizontal cross-sectional area (ceiling side), a hot air port 157 on the side wall on the side with the smaller horizontal cross-sectional area (bottom side), and an exhaust on the end surface that becomes the ceiling. A mouth 159 is formed. The supply port 155 is connected to the outlet of the dehydrator 12, and the hot air port 157 is connected to the hot air generating means 141 via the hot air supply pipe 143. Further, an exhaust pipe 172 described later extends from the exhaust port 159, and the dryer 14 and the dust separator 16 are connected.

  The dryer main body 142 includes a rotating shaft 152 provided substantially at the center in the drying chamber 151 and extending in a substantially vertical direction, a rotating unit 153 for rotating the rotating shaft, and a plurality of end edges fixed to the rotating shaft 152. The chain 154 is provided. The length of the chain 154 is about 5 to 10 mm shorter than the distance from the rotating shaft 152 to the side wall of the drying chamber 151. In this embodiment, the drying chamber 151 is tapered toward the bottom side. The lengths of the plurality of chains 154 fixed at different height positions are different from each other, specifically, become shorter toward the bottom side.

  A lower rotary blade 133 and an upper rotary blade 135 are provided on both ends of the rotary shaft 152, respectively. Each of these rotary blades 133 and 135 has four blades attached at an angle of about 90 °. It is a configuration. Each wing is attached at an angle of about 45 ° with respect to the direction in which the axis of the rotary shaft 152 extends so as to incline toward the edge in the same direction, specifically the upper rotor blade 133 side.

  The rotating shaft 152 is attached to the inside of the drying chamber 151 with the side on which the upper rotating blades 135 are provided as the upper side (ceiling side), and both the rotating blades 133 and 135 generate an upward flow in the drying chamber 151. The rotating shaft 152 is supported by three bearing plates 158 attached at equal intervals. The bearing plate 158 is inclined at an angle of 30 to 60 °, for example, about 45 ° in this embodiment, with respect to the direction in which the shaft extends to the rotation shaft 152 so as not to hinder the flow of the airflow inside the drying chamber 151. And attached to the side wall of the drying chamber 151.

  When the dryer 12 is operated to perform the drying process, the rotating shaft 152 is rotated in the direction opposite to the swirling direction of the hot air cyclone described later, so that the lower rotary blade 133 is rotated independently of the rotating shaft 152. It is preferable to configure so that. That is, it is preferable not to rotate the lower rotary blade 133 during a normal drying process.

  For this purpose, for example, a substantially cylindrical tube body 152b that covers the rotation shaft 152 is provided, a part of the rotation shaft 152 has a double structure, and the lower rotary blade 133 is fixed to the tube body 152b. Further, a driving means (not shown) for rotating the tube body 152b in the direction opposite to the rotation shaft 152 may be connected to the tube body 152b separately from the rotation means 153. In this way, when the driving means is provided in the tube body 152b and the lower rotary blade 133 is rotated in the direction opposite to the rotary shaft 152, the lower rotary blade 133 forms a hot air current cyclone that rotates in the direction opposite to the rotary shaft 152. Therefore, the hot air swirling means can be constituted by the lower rotary blade 133, the tube body 152b, and the driving means.

  The rotating means 153 is composed of a driving means such as a motor. In the present invention, a speed switching mechanism (not shown) having a control function for controlling the rotational speed of the rotating shaft 152 in conjunction with the fan 132 of the hot air generating means 141 is provided. The configuration is attached to the motor. In the present embodiment, the rotation means 153 is configured to be able to arbitrarily change the rotation speed of the rotating shaft 152 by inverter control, but the rotation speed may be changed in at least two stages.

  An exhaust pipe 172 connected to one end of a hood 171 that spreads toward the front end also extends inside the drying chamber 151. The exhaust pipe 172 extends from the exhaust port 159 to the outside of the drying chamber 151, and the other end is connected to the dust separator 16. The dust separator 16 has a separator main body 162 provided with a separation chamber 161 having a mortar-shaped bottom portion that gradually becomes thinner like the dryer 14, and a collecting tank 163 provided at the lower part of the separator main body 162. And a humidified gas pipe 164 extending from the upper part of the separator main body 162.

  The exhaust pipe 172 is connected to the upper side wall of the separation chamber 161, the moisture-containing gas pipe 164 is connected to the ceiling of the separation chamber 161, and the gas containing dust supplied from the exhaust pipe 172 swirls in the separation chamber 161. Descend. The wind speed of the gas decreases downward, is separated from the dried processed product discharged from the dryer 14 together with the gas, and the dust-removed gas (humid gas) is in a state containing moisture. To the dehumidifier 18.

  The dehumidifier 18 is a heat exchanger having a cooling mechanism, and a dry gas from which moisture has been removed is obtained by cooling the moisture-containing gas. Condensed water obtained by cooling the moisture-containing gas by the dehumidifier 18 is discharged from the drain pipe, and the dried gas is circulated from the gas circulation pipe 19 to the hot air generating means 141.

  Hereinafter, the drying method which dries a teacup as a to-be-processed object using the drying apparatus 1 which concerns on this embodiment is demonstrated. First, teacups (water content of about 70 to 85%) discharged from the tea beverage production process are sent from the supply mechanism 125 to the hopper 121 and introduced into the dehydrator main body 122 from the hopper 121 by a predetermined amount. Inside the dehydrator 12, the tea bowl is squeezed and dehydrated in the process of being sent in the right direction in FIG. 1 as the screw 126 rotated by the driving means 127 rotates. The dehydrated filtrate falls from the mesh body 128 and is discharged from the drain outlet 129. On the other hand, the tea bowl is dehydrated to a moisture content of about 75% and becomes a lump with a diameter of about 2 to 10 cm and enters the drying chamber 151 of the dryer 14 from the supply port 155.

  Hot air is supplied to the drying chamber 151 from the hot air supply pipe 143, and the rotating shaft 152 is rotated, whereby the chain 154 is rotated, and the lump-shaped teacup is blown and crushed and falls into the drying chamber 151 while being crushed. . Here, the hot air supply pipe 143 is provided on the bottom side wall of the dryer main body 142 so as to supply hot air from the tangential direction to the inside of the drying chamber having a substantially circular horizontal cross section. For this reason, the hot air sent from the hot air supply pipe 143 comes into contact with the side wall of the drying chamber 151 in the vicinity of the hot air outlet 157 and turns up in the drying chamber 151. In this embodiment, the lower drying chamber 151b has a substantially conical shape that widens upward, so that the hot air can be easily swirled by attaching the hot air supply pipe 143 so as to extend in the tangential direction of the dryer main body 142. (Hot air cyclone).

  In the present embodiment, the hot air supply pipe 143 is connected so as to supply hot air to a position biased to the right side from the vertical center of the drying chamber 151, and the hot air sent from the fan 132 is indicated by an arrow in the figure. Thus, it becomes a hot air current cyclone that turns counterclockwise and rises. On the other hand, the rotating shaft 152 is rotated clockwise, and the chain 154 rotates clockwise to face the hot air cyclone. The tea bowl supplied into the drying chamber 151 contacts a chain 154 that rotates clockwise while turning counterclockwise on a hot air current cyclone. For this reason, in the drying apparatus 1 of this embodiment, the contact frequency of the teacup and the chain is high, and the teacup is quickly broken into pieces.

  The crushed teacup is dried from the surface, and the dried teacup is pulverized into a hot air current cyclone and floats on the upper portion of the drying chamber 151 to enter a substantially cylindrical upper drying chamber 151a. It stays for about 30 minutes. On the other hand, the massive teacup containing water drops below the lower drying chamber 151b and is crushed while coming into contact with a high-temperature hot-air cyclone to evaporate the water and dry the hot-air temperature at about 95 ° C. To lower.

  As described above, in the present invention, a teacup containing a lot of water is dried on the bottom side of the drying chamber 151 in contact with hot air of high temperature (for example, about 150 to 250 ° C.), while the dried teacup is dusty. Then, it rises to the upper drying chamber 151a side, and is further dried by a relatively low temperature (for example, about 80 to 95 ° C.) hot air current cyclone. In the present embodiment, the height of the lower drying chamber 151b in the vertical direction is 2 to 5 m, the height of the upper drying chamber 151a is 1 to 2 m, and the dried processed product raised to the upper drying chamber 151a side is the upper portion. It is surely dried in the drying chamber 151a. For this reason, according to this invention, a teacup can be dried reliably in a short time, and also decomposition | disassembly of catechin etc. by a hot air can be suppressed.

  Since the upper drying chamber 151 a has a low wind speed of the hot air flow cyclone, the dried product floating in the upper drying chamber 151 a is discharged from the exhaust pipe 172 on the exhaust air flow generated in the upper rotor blade 135 provided below the hood 171. Is done. The upper rotor blade 135 generates a discharge airflow opposite to that of the thermal airflow cyclone, so that the dried processed material floating in the vicinity of the upper rotor blade 135 is sucked and sent to the exhaust pipe 172. Here, since the wind speed in the drying chamber 151 is higher near the outer edge and the wind speed is lower in the center, the airflow near the center of the upper drying chamber 151a is weak, and the dust that has become lighter as the drying progresses is selective. Into the exhaust pipe 172. For this reason, according to this invention, the quality of the dried processed material discharged | emitted from the exhaust pipe 172 can be homogenized.

  The dried processed material that has entered the dust separator 16 from the exhaust pipe 172 weakens the momentum of the airflow swirling and descending in the dust separator 16 and spontaneously falls and accumulates in the accumulation tank 163. On the other hand, the gas that has been separated from the dried product and dedusted contains moisture, and is discharged from the moisture-containing gas pipe 164 and supplied to the dehumidifier 18 via the fan 165. In the dehumidifier 18, the moisture-containing gas is indirectly cooled using a cooling medium such as cooling water to condense the moisture contained in the moisture-containing gas, and the moisture is discharged out of the system as condensed water, and the moisture is removed. Thus, a dry gas having a temperature of about 40 to 60 ° C. and a humidity of about 20 to 50% is obtained.

  In the present embodiment, the dehumidifier 18 and the hot air generating means 141 are connected via the gas circulation pipe 19, and most of the dry gas obtained by the dehumidifier 18 is sent to the hot air generating means 141 and heated. It is circulated and supplied into the drying chamber 151 as hot air. In the present invention, since the drying gas is circulated and used, the temperature and humidity of the gas supplied to the hot air generating means 141 are substantially constant within the above range throughout the year. For this reason, energy consumption for gas heating can be reduced, and the processing conditions in the drying chamber 151 can be stabilized. In addition, since the circulated gas has a low oxygen content, oxidation of an object to be processed such as teacups can be suppressed. For this reason, according to this invention, the quality of a dried processed material can be stabilized and quality deterioration can be suppressed. In addition, when the oxidation of a to-be-processed object does not become a problem, it is advantageous to discharge | emit directly, without using the dehumidifier 18. FIG.

  In the present embodiment, a teacup is used as an object to be processed, but the teacup has a relatively uniform particle size and includes various components, and thus tends to adhere to the drying chamber 151. In particular, a lump with teacups may grow on the wall surface of the drying chamber 151 located between the chains 154 provided in multiple stages. In such a case, the present invention changes the height at which the free end of the chain 154 rotates by switching the rotational speed of the rotating shaft 152 to a slow speed operation, and drops the bowl of teacups attached to the wall surface.

  FIG. 3 is a schematic cross-sectional view of the dryer 14 in a state where a slow speed operation is performed. As shown in FIG. 3, when performing a slow speed operation, the rotational speed of the rotating shaft 152 is decreased to make the angle between the chain 154 and the rotating shaft 152 be about 30 to 50 °, so that the chain 154 The height where the tip of is located is changed. On the side wall of the drying chamber 151, the teacup 20 is attached except for the side wall portion at the height where the tip of the chain 154 is positioned in the normal drying process. The bowl 20 and the chain 154 come into contact with each other and the lump of the bowl 20 is crushed.

  Further, when the rotation of the rotating shaft 152 is stopped, the chain 154 hangs down along the rotating shaft 152. Therefore, if the rotating shaft 152 and the side wall of the drying chamber 151 are washed with the cleaning liquid, the inside of the drying chamber 151, the chain 154, and the rotation The shaft 152 can be cleaned at the same time.

  When the dryer 14 is stopped due to a power failure or the like and the operation is restarted, such as when the bowl is accumulated in the bottom of the drying chamber 151, the lower rotary blade 133 is rotated. As a result, the deposit is broken up and the teacup is wound up to the upper side of the drying chamber 151 by the rising airflow. The lower rotor 133 preferably rotates independently from the rotary shaft 152 so as not to hinder the movement of the hot air cyclone, but the hot air current is adjusted while moving the lower rotor 133 by adjusting the amount of hot air blown in. It is not excluded to create a cyclone and perform a drying process.

  The present invention can be used for drying and reusing organic residues such as teacups generated in the production of tea beverages, for example.

It is a figure which shows the drying apparatus which concerns on one Embodiment of this invention. It is a figure which shows the internal structure of the dryer which concerns on the said embodiment. It is a figure which shows the state which is carrying out the slow speed operation | movement of the dryer which concerns on the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying device 12 Dehydrator 14 Dryer 16 Dust separator 18 Dehumidifier 133 Lower rotary blade 135 Upper rotary blade 141 Hot air generating means 142 Dryer main body 143 Hot air supply pipe (hot air swirling means)
151 Drying chamber 152 Rotating shaft 153 Rotating means 154 Chain 155 Supply port 157 Hot air port 159 Exhaust port

Claims (10)

A drier body having a substantially cylindrical shape and having a drying chamber with a ceiling on one end and a bottom on the other end formed therein, and hot air generating means for generating hot air to be supplied to the drying chamber of the drying apparatus main body. A drying device including a dryer,
The dryer further comprises hot air swirling means for raising the hot air while swirling inside the drying chamber,
The dryer body includes a rotating shaft provided in the drying chamber and extending from the bottom side to the ceiling side, a chain having one end fixed to the rotating shaft, and a rotating means for rotating the rotating shaft. Feature drying equipment.   The drying apparatus according to claim 1, wherein the drying chamber has an inverted conical shape in which a bottom end edge of a cylinder is narrowed. The drying chamber is provided on the ceiling side and supplied with an object to be processed; an exhaust port provided on the ceiling for exhausting gas in the drying chamber; and provided on the bottom side of the side wall and supplied from the hot air generating means A hot air outlet through which hot air is blown,
The hot air swirling means is a hot air supply pipe connected to the hot air generating means and a hot air outlet of the drying chamber and extending in a tangential direction of an outer edge of the dryer main body that is substantially circular. Drying equipment.   The drying apparatus according to claim 1, wherein the rotation unit includes a speed switching mechanism that changes a rotation speed of the rotation shaft.   The drying device according to any one of claims 1 to 4, wherein the rotating means includes an upper rotary blade fixed to a ceiling side end of the rotating shaft.   The drying device according to any one of claims 1 to 5, wherein the rotating means includes a lower rotary blade fixed to a bottom side end of the rotary shaft. The drying chamber is provided on the ceiling side and supplied with an object to be processed; an exhaust port provided on the ceiling for exhausting gas in the drying chamber; and provided on the bottom side of the side wall and supplied from the hot air generating means A hot air outlet through which hot air is blown,
The drying apparatus according to claim 1, further comprising a dehydrator connected to a supply port of the drying chamber and dewatering an object to be processed and supplying the processed material to the drying chamber. The drying chamber is provided on the ceiling side and supplied with an object to be processed; an exhaust port provided on the ceiling for exhausting gas in the drying chamber; and provided on the bottom side of the side wall and supplied from the hot air generating means A hot air outlet through which hot air is blown,
An exhaust pipe having a hood connected to the exhaust port and extending to the inside of the drying chamber and having a widened tip, and dust and gas contained in the gas connected to the exhaust pipe and discharged from the drying chamber are separated. The drying apparatus according to any one of claims 1 to 7, further comprising a dust separator including dust separation means for discharging the removed moisture-containing gas. Further comprising a dehumidifier provided downstream of the dust separation means to obtain a dry gas by cooling and dehumidifying the moisture-containing gas;
The drying apparatus according to claim 8, wherein the dehumidifier and the hot air generating unit are connected by a gas circulation pipe that circulates the dry gas discharged from the dehumidifier to the hot air generating unit. A drier body having a substantially cylindrical shape and having a drying chamber having a ceiling on one end and a bottom on the other end formed therein, and hot air generating means for generating hot air supplied to the drying chamber of the drying apparatus main body. A method for producing a dried processed product by supplying a processed product containing moisture to the drying chamber of a dryer and drying the processed product to obtain a dried processed product,
A hot air stream that rotates in a predetermined direction in a chain attached to a rotating shaft extending from the bottom side to the ceiling side in the drying chamber, and the hot air is swirled in a direction opposite to the rotation direction of the chain and rises in the drying chamber A method for producing a dried product, wherein a cyclone is formed and the workpiece is supplied from the ceiling side of the drying chamber.

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