JP4679336B2 - Kitchen garbage dryer - Google Patents

Description

The present invention relates to a garbage dryer .

  2. Description of the Related Art Conventionally, a garbage dryer that heats and drys garbage using high-temperature steam is known. In this type of garbage dryer, steam containing moisture is used as a heating source, so when heating garbage, not only sensible heat of steam but also latent heat can be used. Therefore, the garbage can be efficiently heated.

  By the way, since garbage contains a lot of moisture, steam is generated with heating and drying of the garbage. In this way, the steam generated from garbage also contains a lot of latent heat energy. Therefore, in order to effectively use energy, a drying apparatus that reuses steam generated from garbage (hereinafter referred to as “garbage steam”) as a heating source for garbage has been proposed (for example, see Patent Document 1). ).

However, it is difficult for the waste vapor to generate a sufficient amount of heat as a heating source as it is. Therefore, in the drying apparatus disclosed in Patent Document 1, after the sensible heat of the steam is increased by heating the waste steam with a heater, the condensation of the waste steam is promoted by pressurizing with the pressurizer, and the latent heat The amount is going to increase.
JP 2002-243365 A

  As described above, in the drying apparatus described in Patent Document 1, the amount of heat that is insufficient with the waste steam itself is compensated by heating and pressurizing the steam. Therefore, in the said drying apparatus, the large sized heater and pressurizer were required separately from the dryer. Therefore, the apparatus is expensive and may be increased in size.

  By the way, in a small dryer, since a drying route is short, it is considered that drying of garbage becomes incomplete when continuously operated. Therefore, a small dryer often performs a batch operation in which a predetermined amount of waste is sufficiently dried and then the next waste is dried. However, in such a small dryer, when the waste steam is reused as described above, the amount of generated waste steam is uneven in the batch operation. Therefore, when the waste steam is reused in a small dryer, there is a problem that it is difficult to stably supply heat and it takes time to dry.

This invention is made | formed in view of this point, The place made into the objective is providing the garbage dryer which is small or cheap, has little fuel consumption, and has high drying performance.

A garbage dryer according to the present invention surrounds a first cylindrical body extending in a vertical direction for defining a garbage flow path through which garbage is circulated, and a periphery of the first cylindrical body. A second cylindrical body that defines a flow path between the cylindrical body, a rotary shaft provided in the first cylindrical body, a rotary shaft provided on the rotary shaft, and spirally disposed upward. And at least a first flow path, a conveying blade having a plurality of blade members separated from each other, a rotation drive mechanism for conveying the garbage upward by rotating the rotating shaft, and the flow path. road and said a first flow path and the partitioning member partitioning the second flow path adjacent the vertical direction, but with the.

The said garbage flow path is provided with the garbage inflow part into which garbage flows in, and the garbage outflow part which flows out garbage, and the said garbage outflow part is provided above the said garbage inflow part. . The rotation drive mechanism is configured to rotate the rotation shaft at least at a first rotation speed and a second rotation speed larger than the first rotation speed. The first rotation speed is set so that part of the garbage falls from between the blade members, while the remaining garbage is conveyed upward by the blade members. The second rotation speed is set so that substantially all garbage is conveyed upward by the blade member.

  According to the said garbage dryer, when the garbage in a garbage flow path is conveyed by a conveyance blade, while being stirred by the said conveyance blade, while passing through a 1st cylindrical body, a 1st flow path It is heated by the fluid in the second channel and also heated by the fluid in the second channel. Therefore, the garbage is heated by at least two kinds of fluids from the outside of the first cylindrical body while being stirred, and is efficiently dried. Therefore, a garbage dryer with a small size and high drying performance can be realized.

  Moreover, according to the said garbage dryer, a conveyance blade rotates with rotation of a rotating shaft, and the garbage of a garbage flow path is conveyed. At this time, the garbage receives centrifugal force due to the rotation of the conveying blades and moves to the radially outer side (the inner wall side of the first cylindrical body) in the first cylindrical body. Moreover, the channel (the 1st channel and the 2nd channel) divided into two is formed in the outside of the 1st cylindrical object in which the garbage channel was formed. Therefore, according to the said garbage dryer, a garbage and the fluid in each flow path will adjoin via a 1st cylindrical body, and can perform heat exchange efficiently between both.

  Further, according to the above garbage dryer, since the first flow path and the second flow path are partitioned by the partition member, for example, the heated fluid in the first flow path, the second flow path By allowing a low-temperature fluid to flow in the flow path, it is possible to use it by cooling the garbage after it has been dried. In the above garbage dryer, various fluids such as steam, exhaust gas, and liquid can be used as a heating (or cooling) medium. Therefore, it is possible to change the heating (or cooling) medium corresponding to the dried product.

  The garbage is heated and dried by the fluid, and rotated according to the rotation of the blade member, and dehydrated by receiving centrifugal force. Moreover, in the garbage channel, the garbage is conveyed upward by the blade member. Here, the blade members are separated from each other, and a gap is formed between the blade members. Therefore, a part of the garbage being transported falls from the gap and is transported again from below to above. Therefore, the garbage is vigorously stirred and the drying efficiency is improved.

  During normal drying operation, the garbage can be efficiently dried by rotating the rotating shaft at the first rotation speed. On the other hand, after drying is completed, the rotational speed of the rotating shaft is increased to the second rotational speed, so that the garbage remaining in the garbage flow path is applied to the inner surface of the first cylindrical body by centrifugal force. It can be forcibly discharged along.

  Preferably, the garbage dryer includes a fluid supply pipe that is connected to the second cylindrical body and supplies fluid to the second channel from a tangential direction.

  Accordingly, the fluid is supplied from the fluid supply pipe to the second flow path from the tangential direction. Therefore, it becomes easy to distribute | circulate the fluid uniformly in the 2nd flow path, and a drying efficiency improves.

The first flow path and the second flow path preferably each include an inflow portion and an outflow portion located below the inflow portion .

  As a result, the fluids in the first and second flow paths and the garbage in the garbage flow path flow in directions opposite to each other. Therefore, the heat exchange efficiency between each fluid and garbage is improved.

  It is preferable that the said garbage dryer is equipped with the discharge outlet which supplies air to the garbage flow path in the said 1st cylindrical body.

  The lower the water vapor partial pressure in the garbage flow path, the easier the moisture contained in the garbage is evaporated. However, when the garbage is dried, a large amount of steam is generated from the garbage, so that the partial pressure of water vapor in the garbage channel is high. Therefore, in the above garbage dryer, air is supplied to the garbage flow path to lower the water vapor partial pressure. Therefore, according to the said garbage dryer, the water | moisture content contained in garbage becomes easy to evaporate, and drying efficiency improves.

  The rotating shaft is composed of a third cylindrical body that defines an air flow path on the inner side, and the discharge port communicates the inside and the outside of the third cylindrical body. It is preferable to be formed.

  Thus, the discharge port that supplies air to the garbage flow path rotates as the rotation shaft rotates. Therefore, air is uniformly supplied to the garbage channel. Moreover, since the conveyance blade | wing is helically attached to the rotating shaft, it conveys garbage in the direction opposite to the rotation direction of a rotating shaft with rotation of a rotating shaft. Therefore, the rotation direction of the discharge port is opposite to the rotation direction of the garbage, and air is uniformly supplied to the garbage. Therefore, according to the said dryer, drying efficiency improves more.

As described above, according to the present invention, it is possible to realize a garbage dryer that is small or inexpensive, has low fuel consumption, and has high drying performance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the garbage processing apparatus 1 according to the embodiment includes a garbage pulverizing system 2 and a garbage drying system 3. The garbage processing apparatus 1 is an apparatus that pulverizes and refines the garbage in the garbage crushing system 2, then heats and drys the garbage in the garbage drying system 3 and discharges it as dried garbage.

  The garbage pulverizing system 2 includes a pulverizer 4 for pulverizing the garbage, and a garbage hopper 5 for collecting the garbage crushed by the pulverizer 4. The garbage hopper 5 is connected to the garbage flow path 52 of the dryer 6 via the garbage supply pipe 16.

  The garbage drying system 3 includes a dryer 6, a boiler 7, a wet dust collector 8, a deodorizing device 20, and heat exchangers 22 and 23.

  Inside the dryer 6, a steam channel 50 and a garbage channel 52 through which the garbage is distributed are partitioned. The steam channel 50 is divided into a first steam channel 51 and a second steam channel 53 by a partition member 43 described later. Further, an air flow path 54 for supplying external air into the garbage flow path 52 is defined in the dryer 6. The detailed configuration of the dryer 6 will be described later.

  Fuel such as kerosene is used for the boiler 7. Although illustration is omitted, the boiler 7 is provided with an air intake part for taking in combustion air and a water supply part for taking in water. The boiler 7 generates steam by boiling water taken from the water supply unit.

  A steam discharge part (not shown) of the boiler 7 and the first steam flow path 51 of the dryer 6 are connected via a first steam pipe 11. The first steam channel 51 and the water supply unit of the boiler 7 are connected via the first water distribution pipe 12.

  The garbage flow path 52 of the dryer 6 and the gas inflow portion of the wet dust collector 8 are connected via the second steam pipe 13. The second steam channel 53 of the dryer 6 and the water storage part of the wet dust collector 8 are connected via the second water distribution pipe 14.

  The gas outflow part of the wet dust collector 8 and the heat exchanger 23 are connected via a first steam return pipe 85. The first steam return pipe 85 is provided with an intake fan 40. The heat exchanger 23 includes a low temperature side flow path and a high temperature side flow path, and exchanges heat between the fluid in the low temperature side flow path and the fluid in the high temperature side flow path. The first steam return pipe 85 is connected to the upstream end of the low-temperature channel of the heat exchanger 23. On the other hand, the other end side of the low temperature side flow path of the heat exchanger 23 is connected to the deodorizing device 20 via the second steam return pipe 86.

  The deodorization apparatus 20 is an apparatus for contacting a vapor containing odor supplied from the second vapor return pipe 86 (hereinafter referred to as “odorous exhaust gas”) with an oxidation catalyst to oxidatively decompose harmful gas in the odorous exhaust gas. It is. In order to exert the catalytic function of the oxidation catalyst, it is necessary to heat the odor exhaust gas to around 300 degrees Celsius in advance. Therefore, the deodorizing apparatus 20 includes a heater 24 that preheats the odorous exhaust gas, and a catalyst tank 25 that oxidatively decomposes the odorous exhaust gas using an oxidation catalyst. In addition, the heater 24 may be integrally formed with the deodorizing apparatus 20, and is good also as a different body. Further, as the heater 24, any heater that heats steam, such as a thermal heater or a heat exchanger, may be used. As the oxidation catalyst, a noble metal such as platinum or palladium and an oxide such as iron, manganese or nickel are appropriately used depending on the kind of harmful gas contained in the odor exhaust gas.

  The deodorizing device 20 and the upstream end of the high-temperature side flow path of the heat exchanger 23 are connected via a third steam return pipe 87. As a result, the high-temperature steam heated and deodorized by the deodorizing device 20 is supplied into the high-temperature channel of the heat exchanger 23. Further, the downstream end of the high-temperature channel of the heat exchanger 23 and the heat exchanger 22 are connected via a fourth steam return pipe 88.

  Similar to the heat exchanger 23, the heat exchanger 22 includes a low temperature side flow path and a high temperature side flow path, and exchanges heat between the fluid in the low temperature side flow path and the fluid in the high temperature side flow path. is there. The fourth steam return pipe 88 is connected to the upstream end of the high temperature side flow path of the heat exchanger 22. On the other hand, the other end side of the high temperature side channel of the heat exchanger 22 is connected to the second steam channel 53 of the dryer 6 via a fifth steam return pipe 89.

  An inlet pipe 26 that introduces external air into the low temperature side flow path of the heat exchanger 22 is connected to the upstream end of the low temperature side flow path of the heat exchanger 22. On the other hand, the downstream end of the low temperature side flow path of the heat exchanger 22 is connected to the upstream end of the air flow path 54 of the dryer 6 via the intake pipe 21.

  An exhaust pipe 18 is connected to the second steam channel 53 of the dryer 6. The exhaust pipe 18 is provided with an exhaust fan 39. Thereby, the used steam in the second steam channel 53 is exhausted to the outside through the exhaust pipe 18 by the exhaust fan 39. Note that the exhaust fan 39 is not always necessary, and the used steam in the second steam channel 53 can be exhausted to the outside through the exhaust pipe 18 without providing the exhaust fan 39.

  The garbage path 52 of the dryer 6 is connected to the collector 10 via the garbage discharge pipe 17. The collector 10 temporarily stores dry waste after drying.

  Next, the configuration of the dryer 6 will be described.

  As shown in FIG. 2, the dryer 6 is provided in the drying part 31 which dries garbage inside, the base part 41 which supports the drying part 31, and the drying part 31, and the rotating shaft 36 (FIG. 3) mentioned later. And a motor 71 for rotationally driving. The base part 41 includes a plurality of horizontal members, and includes a base part 41a to which the drying part 31 is attached and a leg part 41b that includes four vertical members and is attached to the lower part of the base part 41a. With such a configuration, the base part 41 supports the drying part 31 from below.

  As shown in FIG. 3, the drying unit 31 includes an inner cylinder 32, an outer cylinder 33 that surrounds the inner cylinder 32, a circular top plate 34 that covers the inner cylinder 32 and the upper end of the outer cylinder 33, and an inner cylinder 32. And a circular bottom plate 30 that covers the lower end of the outer cylinder 33. The inner cylinder 32 is provided inside the outer cylinder 33 and is arranged coaxially with the outer cylinder 33. A partition member 43 that divides the space between the inner cylinder 32 and the outer cylinder 33 into two upper and lower layers is attached to the central portion in the vertical direction and the outer peripheral surface of the inner cylinder 32.

  With the above configuration, the interior of the drying unit 31 includes the garbage flow path 52 inside the inner wall 32, the first steam flow path 51 between the inner cylinder 32 and the outer cylinder 33 and below the partition member 43, A second steam channel 53 is defined between the inner cylinder 32 and the outer cylinder 33 and above the partition member 43.

  A rotation shaft 36 is provided at the center of the inner cylinder 32. The rotating shaft 36 extends in the vertical direction in the garbage flow path 52. The rotary shaft 36 is formed of a cylindrical body that forms an air flow path 54 therein, and a plurality of discharge ports 56 are formed in the lower portion of the outer peripheral surface.

  The upper end portion of the rotating shaft 36 extends further upward through the top plate 34 and is rotatably supported by a bearing 62 attached to the fixing member 35. The fixing member 35 is a plate-like body having a U-shaped cross section and is attached to the top plate 34 (see FIG. 2). A mounting portion 35a made of a cylindrical body is provided on the upper portion of the fixing member 35, and the intake pipe 21 (see FIG. 1) is connected to the mounting portion 35a. Further, the air flow path 54 inside the rotary shaft 36 penetrates through the bearing 62 and the fixed member 35 and reaches the mounting portion 35a. With such a configuration, the air supplied to the air flow path 54 by the intake pipe 21 passes through the rotary shaft 36 and is guided into the garbage flow path 52 through the discharge port 56.

  On the other hand, the lower end portion of the rotating shaft 36 is in the inner cylinder 32 and opens downward at a position above the bottom plate 30. A rotation shaft 73b is fitted into the lower end portion so as to rotate integrally with the rotation shaft 36. The rotating shaft 73b is rotatably supported by a bearing 62 attached to the center portion of the bottom plate 30. As described above, the rotary shaft 36 and the rotary shaft 73b are rotatably supported by the bearings 62 attached to the top plate 34 and the bottom plate 30. The rotary shaft 36b and the rotary shaft 73b are driven to rotate. To rotate together.

  A dust supply port 42 is provided at the lower end of the inner cylinder 32. A dust supply pipe 16 penetrating the outer cylinder 33 is connected to the dust supply port 42. In addition, although illustration is abbreviate | omitted, in the inside of the garbage supply pipe | tube 16, the screw which conveys garbage from the garbage hopper 5 (refer FIG. 1) is installed. The screw quantitatively feeds garbage into the garbage channel 52.

  A dust discharge port 48 is provided in the inner cylinder 32 for discharging the dust inside. In addition, a chute 47 for guiding the waste discharged from the waste discharge port 48 to the collector 10 (see FIG. 1) is provided at the waste discharge port 48. The chute 47 is provided so as to penetrate each of the inner cylinder 32 and the outer cylinder 33, and is fixed to the top plate 34. In the chute 47, a lid 48a for opening and closing the dust discharge port 48 is provided. The lid 48 a is supported by an opening / closing device 48 b attached on the top plate 34.

  A discharge port 37 for discharging steam generated in the garbage flow path 52 is formed in the top plate 34, and the second steam pipe 13 (see FIG. 1) is connected to the discharge port 37.

  As shown in FIG. 2, a steam inlet 43 that opens into the second steam channel 53 is formed in the upper part of the outer cylinder 33, and a fifth steam return pipe 89 is connected to the steam inlet 43. Yes. Therefore, the steam from the fifth steam return pipe 89 is introduced into the second steam channel 53 through the steam inlet 43. The fifth steam return pipe 89 extends in the tangential direction of the outer cylinder 33 and is formed so as to introduce steam along the tangential direction (see FIG. 5).

  On the other hand, an exhaust port 44 for discharging the steam that has flowed through the second steam channel 53 is formed at the center of the outer cylinder 33, and the exhaust pipe 18 is connected to the exhaust port 44. Further, the outer cylinder 33 is formed with a discharge port (not shown) for discharging condensed water generated in the second steam channel 53, and the second distribution pipe 14 (see FIG. 1) is formed in this discharge port. ) Is connected.

  A steam inflow portion 45 that opens into the first steam channel 51 is formed at the center of the outer cylinder 33, and the first steam pipe 11 (see FIG. 1) is connected to the steam inflow portion 45. Yes. Therefore, the steam from the first steam pipe 11 is introduced into the first steam channel 51 through the steam inflow portion 45. On the other hand, a discharge portion 46 for discharging condensed water generated in the first steam flow path 51 is formed at the lower portion of the outer cylinder 33, and the first distribution pipe 12 (see FIG. 1) is formed in the discharge portion 46. Is connected.

  As shown in FIG. 3, a plurality of spiral blades 77 are provided on the outer peripheral surface of the rotation shaft 36 in a spiral manner upward. These spiral blades 77 include a support member 77a attached to the rotary shaft 36 and a blade 77b attached to the support member 77a. The blade 77b is formed so as to convey the garbage upward. A gap is provided between the blade 77 b and the inner wall of the inner cylinder 32.

  The spiral blades 77 are provided such that the blades 77b are arranged at regular intervals along the spiral direction. In the present embodiment, the spiral blade 77 is formed every 45 degrees around the rotation center in a plan view, and rotates clockwise as the rotation shaft 36 rotates. However, the shape, arrangement angle, and rotation direction of the spiral blade 77 are not limited to those described above.

  As shown in FIG. 2, the motor 71 is attached to the drying unit 31 and the base unit 41 via an angle 38. A sprocket 74 a is fixed to the rotating shaft 73 a of the motor 71. The motor 71 is a motor whose rotational speed can be freely controlled, and is connected to the controller 76. The controller 76 executes ON / OFF control, rotation speed control, and the like of the motor 71.

  As described above, the rotation shaft 73b is provided at the center of the bottom plate 30 (see FIG. 3). A sprocket 74b is fixed to the rotating shaft 73b. A chain 75 is wound around the sprocket 74a of the motor 71 and the sprocket 74b. As a result, when a switch (not shown) of the controller 76 is turned ON, the motor 71 is started and the rotary shaft 36 is rotationally driven via the chain 75.

  The above is the configuration of the garbage disposal apparatus 1. Next, the operation of the garbage disposal apparatus 1 will be described.

  In addition, the dryer 6 which concerns on this embodiment is a small dryer, and a drying path | route (the length by which garbage is conveyed with the conveyance blade 77) is short. For this reason, in continuous operation, drying of garbage may be incomplete. Therefore, in the dryer 6 according to the present embodiment, after a predetermined amount of waste is sufficiently dried, batch operation is performed in which the next waste is dried.

  As shown in FIG. 1, the high-temperature steam supplied from the boiler 7 flows through the first steam pipe 11 and then flows into the first steam channel 51 of the dryer 6. The steam flowing downward in the first steam channel 51 exchanges heat with the garbage in the garbage channel 52 and heats the garbage. At this time, the steam is cooled and condensed to become condensed water. The condensed water is discharged through the discharge port 46 (see FIG. 2), and returned to the water supply unit (not shown) of the boiler 7 through the first water distribution pipe 12. The condensed water returned to the boiler 7 is heated and evaporated by the boiler 7, and becomes steam again, and is supplied to the first steam flow path 51 of the dryer 6 through the first steam pipe 11.

  The garbage to be treated is first put into the pulverizer 4, pulverized by the pulverizer 4, and then collected in the garbage hopper 5. The garbage collected in the garbage hopper 5 is conveyed to the garbage flow path 52 of the dryer 6 by a screw (not shown). In addition, in order to perform the above-described batch operation, it is assumed that the lid 48a of the dryer 6 is previously closed by the opening / closing device 48b (see FIG. 3). When a predetermined amount of garbage is conveyed to the garbage channel 52, the screw is stopped and a normal operation described later is performed.

  When the normal operation is started, the garbage in the garbage channel 52 is conveyed upward in the garbage channel 52. At this time, the garbage is heated by the steam in the first steam channel 51 through the wall surface of the inner cylinder 32 and is also heated by the steam in the second steam channel 53. The garbage is agitated in the garbage channel 52. As a result, water contained in the garbage is evaporated and the garbage is dried.

  When the garbage is dried, the lid 48a is opened by the opening / closing device 48b, and a high-speed operation described later is started (see FIG. 3). Thus, the dried garbage is discharged through the garbage discharge pipe 17 and collected in the collector 10. And the garbage collected by the collector 10 is processed as dry garbage.

  On the other hand, the steam generated in the garbage flow path 52 is led to the wet dust collector 8 through the second steam pipe 13 and is removed by the wet dust collector 8. The steam after the dust removal passes through the first steam return pipe 85 and performs heat exchange with the steam discharged from the deodorizing device 20 in the heat exchanger 23. At this time, since the steam discharged from the deodorizing device 20 is in a high temperature state of about 300 degrees Celsius due to heating before the deodorizing in the deodorizing device 20, the steam after passing through the wet dust collector 8 is heated. Thereafter, the heated steam in the first steam return pipe 85 passes through the second steam return pipe 86 and is introduced into the heater 24 of the deodorizing apparatus 20. The steam heated to around 300 degrees Celsius in the heater 24 is sent into the catalyst tank 25 and deodorized.

  The deodorized steam passes through the third steam return pipe 87 and exchanges heat with the steam after passing through the wet dust collector 8 described above in the heat exchanger 23. After the heat exchange, the deodorized steam passes through the fourth steam return pipe 88 and exchanges heat with the air (air from outside) introduced into the heat exchanger 22 by the introduction pipe 26 in the heat exchanger 22. . After the heat exchange, the steam discharged from the heat exchanger 22 passes through the fifth steam return pipe 89 and is supplied into the second steam channel 53 of the dryer 6.

  The steam is supplied into the second steam channel 53 from above the outer cylinder 33 and from the tangential direction of the outer cylinder 33. Therefore, the steam flows downward and spirally in the second steam channel 53 and heats the garbage in the garbage channel 52 through the wall surface of the inner cylinder 32. The steam cooled by heating is exhausted to the outside through the exhaust pipe 18. Moreover, a part of the steam that heated the garbage is condensed to become condensed water. The condensed water is supplied to the wet dust collector 8 through the second water distribution pipe 14 and reused in the wet dust collector 8.

  On the other hand, the air heated in the heat exchanger 22 passes through the intake pipe 21 and is supplied into the air flow path 54 of the dryer 6. The air supplied to the air flow path 54 is supplied into the garbage flow path 52 via the discharge port 56 (see FIG. 3), and directly contacts the garbage to heat the garbage without passing through the medium. To do.

  During the above operation, the dryer 6 is controlled by the controller 76. In addition to the normal operation described below, the controller 76 also executes a high-speed operation described later.

  In the normal operation, after a predetermined amount of garbage is supplied to the garbage channel 52 by the screw, the rotating shaft 36 rotates to convey the garbage from the lower part to the upper part of the garbage channel 52, while the support member 77 a In this operation, the dust is dropped from the gap (the inner part of the garbage flow path 52) or the gap of the blade 77b, and dried while stirring. In normal operation, the controller 76 operates the motor 71 at a predetermined rotation speed (hereinafter referred to as the first rotation speed).

  Specifically, in normal operation, the garbage pushed into the garbage flow path 52 is rotated by the blade 77b of the conveying blade 77 that rotates integrally with the rotation shaft 36 as the rotation shaft 36 rotates. It is conveyed spirally upward.

  By the way, the conveyance blade 77 includes a support member 77a attached to the rotary shaft 36 and a blade 77b attached to the support member 77a. The blades 77b are arranged at regular intervals in plan view. Therefore, some garbage on the blade 77b naturally falls through the gap between the support members 77a or the gap between the blades 77b. As a result, the garbage is effectively agitated by repeating upward conveyance and dropping. Further, the garbage is dried by absorbing heat from the steam of the first steam channel 51 and the second steam channel 53 while being conveyed by the blade 77b.

  By the way, in the normal operation, the garbage is agitated by transporting it upward while dropping, so in the operation as it is, the garbage after drying from the garbage flow path 52 (hereinafter referred to as “dry garbage”). ) Cannot be discharged smoothly. That is, at the rotational speed of the blade 77b in the normal operation, the dry waste falls downward from the gap of the support member 77a or the gap of the blade 77b, so that the dry waste in the garbage flow path 52 can be discharged smoothly. Can not. Therefore, in the present dryer 6, in the discharge stage after drying, the following high-speed operation is executed to smoothly discharge the dry waste from the dryer 6.

  In the high-speed operation, first, the controller 76 controls the rotation shaft 36 to rotate at a high speed. That is, the rotational speed of the motor 71 is set to a predetermined rotational speed (hereinafter referred to as the second rotational speed) that is larger than the first rotational speed. As a result, the blade 77b provided on the rotating shaft 36 also rotates at a high speed, so that the dry waste in the garbage flow path 52 is conveyed at a higher speed. Further, a greater centrifugal force is applied to the dry waste than during normal operation. Therefore, the dry waste rises smoothly along the inner peripheral surface of the inner cylinder 32. As a result, although the gap is formed between the support members 77a or the blades 77b, all or almost all of the dry waste in the garbage flow path 52 reaches the top of the garbage flow path 52, The waste is discharged from the waste outlet 48 to the outside.

  As described above, according to the present embodiment, the steam generated from the garbage at the time of drying the garbage is reused as a heat source for drying garbage, so that the fuel consumption of the boiler 7 can be reduced.

  In the present embodiment, not only the steam generated from the garbage is used as a heat source for drying garbage, but the steam is used in combination with the steam generated by the boiler 7. Therefore, stable heat supply is possible as compared with the case where only steam generated from garbage is used as a heat source for drying.

  By the way, when only the steam generated from the garbage is used as a heat source for drying, the steam generated from the garbage has an insufficient amount of heat as a heating source of the garbage, and it is necessary to separately heat and pressurize the steam. On the other hand, in the garbage drying system 3 according to the present embodiment, when the odor exhaust gas is deodorized, catalyst deodorization using an oxidation catalyst is performed. In order to exert the catalytic function of the oxidation catalyst, it is necessary to heat the odor exhaust gas to around 300 degrees Celsius in advance. Therefore, the steam after deodorization has a very high temperature, which is around 300 degrees Celsius.

  Therefore, in the present embodiment, the heater 24 provided in the deodorizing apparatus 20 is used as a heating source by focusing on the waste heat generated by the deodorization and deodorizing the steam generated from the garbage before returning it to the dryer 6. It is said. Therefore, waste heat due to deodorization can be used effectively. In addition, it is necessary to provide separate heating sources for the deodorizing device 20 and the piping (in this embodiment, the first steam return pipe 85 to the fifth steam pipe 89) for returning the dust-removed steam to the dryer 6. Therefore, the system can be reduced in size and the fuel consumption can be reduced.

  During operation of the dryer 6, the garbage receives centrifugal force due to the rotation of the conveying blades 77 and moves to the inner wall side (outer in the radial direction) of the inner cylinder 32. In the present embodiment, a steam channel (first steam channel 51 and second steam channel) divided into two is provided outside the inner cylinder 32 in which the garbage channel 52 is formed. Therefore, according to the dryer 6 which concerns on this embodiment, the heat exchange with the steam which distribute | circulates the outer side of the inner cylinder 32, and the garbage which distribute | circulates the inside of the inner cylinder 32 is performed efficiently using the inner cylinder 32 as a medium. be able to.

  In the present embodiment, outside air is supplied into the garbage flow path 52. When the garbage is dried, a large amount of steam is generated from the garbage. Therefore, the partial pressure of water vapor in the garbage flow path 52 is high, and the moisture contained in the garbage is difficult to evaporate. However, in the present embodiment, air is supplied into the garbage flow path 52 to lower the water vapor partial pressure in the garbage flow path 52 so that the water contained in the garbage is easily evaporated. Therefore, according to this embodiment, the drying efficiency of the dryer 6 can be improved.

  In this embodiment, in the heat exchanger 22, the air taken in from the outside and the steam after deodorization are heat-exchanged to heat the air taken in from the outside. Therefore, according to the present embodiment, by supplying air into the garbage flow path 52, not only the water vapor partial pressure can be lowered, but also the amount of heat can be directly applied, and the drying performance can be improved. . Furthermore, since the waste heat due to deodorization can be used effectively, the fuel consumption of the system can be reduced.

  Furthermore, according to the present embodiment, the discharge port 56 that supplies air to the garbage flow path 52 is formed in the rotary shaft 36. Therefore, the discharge port 56 rotates as the rotation shaft 36 rotates. Therefore, air is uniformly supplied to the garbage flow path 52. Further, since the rotation direction of the discharge port 56 (same as the rotation direction of the rotary shaft 36) is opposite to the rotation direction of the garbage conveyed by the conveying blades 77, air is uniformly supplied to the garbage. . Therefore, according to this embodiment, the drying efficiency of the dryer 6 can be further improved.

  Further, according to the present embodiment, the flow direction of the steam in the second steam flow path 53 and the flow direction of the waste in the garbage flow path 52 are opposed to each other inside the dryer 6. That is, steam and garbage that exchange heat with each other are made to flow counter-currently. Therefore, the garbage can be efficiently heated.

  In the present dryer 6, the conveying blade 77 includes a support member 77a attached to the rotary shaft 36 and a blade 77b attached to the support member 77a, and the blade 77b is arranged in a spiral shape with a certain interval. It was decided to. Therefore, as the rotating shaft 36 rotates, the dust naturally falls through the gap between the support members 77a or the gap between the blades 77b while being conveyed to the blade 77b. By repeating this conveyance and dropping at each stage, waste can be frequently stirred, so that more efficient drying can be performed.

  Further, in the present dryer 6, the fifth steam return pipe 89 is formed so as to supply steam into the second steam channel 53 from the tangential direction of the outer cylinder 33. Therefore, it becomes easy to supply steam uniformly in the 2nd steam flow path 53, and it can improve the drying efficiency of garbage.

  Further, according to the present embodiment, the steam generated from the garbage is not supplied to the second steam channel 53 as it is, but is removed from the wet dust collector 8 and then supplied to the second steam channel 53. Yes. Therefore, the amount of dust flowing into the second steam channel 53 can be reduced, and adhesion of scale to the inner wall of the outer cylinder 33 and the outer wall of the inner cylinder 32 can be suppressed. Therefore, it is possible to suppress a decrease in heat exchange efficiency due to the adhesion of scale.

  Further, since the wet dust collector 8 is particularly used as the dust collector, the condensed water generated in the second steam channel 53 can be reused by the wet dust collector 8.

  In this embodiment, the generated steam of the boiler 7 is used as a heat source for drying. However, the supply source of the steam is not limited to the boiler 7, and it is possible to use surplus steam discharged from other devices or the like. . In that case, further fuel reduction is possible.

  Further, as shown in FIG. 3, the waste supply pipe 16 of the dryer 6 is provided with a discharge portion 57 for taking air into the waste supply pipe 16. In the present embodiment, the intake pipe 21 is connected to the attachment portion 35 a and air is supplied into the garbage flow path 52 through the inside of the rotary shaft 36. However, it is also possible to connect the intake pipe 21 to the discharge part 57 and supply air into the garbage flow path 52 via the garbage supply pipe 16. Even with such a configuration, the above-described effects can be obtained.

  In the dryer 6 according to the present embodiment, a partition member 43 that divides the space between the inner cylinder 32 and the outer cylinder 33 into a first steam channel 51 and a second steam channel 53 is provided. Yes. However, the use of the space defined by the partition member 43 is not limited to these, and may be divided into, for example, a first steam channel 51 and an air channel through which heated air or cooling air is circulated. Thereby, heating or cooling can be changed corresponding to an object to be dried, and a medium (vapor, air, liquid, etc.) to be heated or cooled can be changed.

As described above, the present invention is useful for a garbage dryer .

It is a block diagram of a garbage disposal apparatus. It is a left view of a dryer. It is front sectional drawing of a dryer. It is a right view of a dryer. It is a top view of a dryer.

DESCRIPTION OF SYMBOLS 7 Boiler 8 Wet dust collector 11 1st steam piping 12 1st water distribution pipe 14 2nd water distribution pipe 20 Deodorizing device 22 Heat exchanger 23 Heat exchanger 24 Heater 25 Catalyst tank 32 Inner cylinder (1st cylindrical body, partition member)
33 Outer cylinder (second cylindrical body)
36 Rotating shaft (Rotating shaft, third cylindrical body)
43 partition member 50 steam channel 51 first steam channel (first channel)
52 Garbage channel 53 Second steam channel (second channel)
54 Air channel 56 Discharge port 71 Motor (rotary drive mechanism)
77 Conveying blade 77b Blade (blade member)
85 1st steam return pipe 86 2nd steam return pipe 87 3rd steam return pipe 88 4th steam return pipe 89 5th steam return pipe

Claims (5)

A first tubular body extending in the vertical direction for defining a garbage flow path for distributing the garbage on the inside;
A second tubular body surrounding the first tubular body and defining a flow path between the first tubular body;
A rotating shaft provided in the first cylindrical body;
A conveying blade provided with a plurality of blade members provided on the rotating shaft and spirally arranged upward and separated from each other ;
A rotation drive mechanism for conveying the garbage upward by rotating the rotating shaft;
The flow path, at least, includes a first flow path, and a partition member partitioning into a first flow path and second flow path adjacent the vertical direction,
The garbage flow path is provided with a garbage inflow portion for allowing the garbage to flow in, and a garbage outflow portion for allowing the garbage to flow out, and the garbage outflow portion is provided above the garbage inflow portion,
The rotation drive mechanism is configured to rotate the rotation shaft at least at a first rotation speed and a second rotation speed larger than the first rotation speed,
The first rotation speed is set so that a part of the garbage falls from between the blade members, while the remaining garbage is conveyed upward by the blade members,
The second rotating speed is a garbage drying machine in which substantially the whole garbage is set to be conveyed upward by the blade member . Connected to said second tubular body, said with a fluid supply pipe for supplying the fluid tangentially into the second flow path, garbage dryer of claim 1. The garbage drying machine according to claim 1 or 2, wherein each of the first flow path and the second flow path includes an inflow portion and an outflow portion positioned below the inflow portion. With a discharge port for supplying air to the garbage flow path of the first cylindrical body, garbage dryer according to any one of claims 1 to 3. The rotating shaft is composed of a third cylindrical body that defines an air flow path inside,
The discharge port so as to communicate the inside and the outside of the third cylindrical member, and is formed on the third tubular member, garbage dryer of claim 4.