JP2006122815A - Garbage drier and garbage drying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and inexpensive garbage drier with less fuel consumption. <P>SOLUTION: This drier 6 is provided with a rotatable inner cylinder 32 and an outer cylinder 33 surrounding the inner cylinder 32. The outer cylinder 33 has hollow double tube structure comprising an outer wall 33a and an intermediate wall 33b. A first steam passage 51 is formed inside an inner wall 32a of the inner cylinder 32. A garbage passage 52 is formed between the inner wall 32a and intermediate wall 33b. A second steam passage 53 is formed between the intermediate wall 33b and outer wall 33a. Spirally disposed multiple blades 70 are provided on the outer periphery of the inner wall 32a. High temperature steam from a boiler is supplied to the first steam passage 51. Steam generated from garbage in the garbage passage 52 is heated and supplied to the second steam passage 53. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a garbage dryer and a garbage drying system.

  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. Then, in order to use energy effectively, the drying apparatus which reuses the vapor | steam generated from garbage as a heating source of garbage is proposed (for example, refer patent document 1).

  The drying apparatus disclosed in Patent Document 1 is provided in a dryer in which a garbage flow path and a steam flow path are defined, a steam pipe connecting the garbage flow path and the steam flow path, and a steam pipe. And a pressurizer provided in the steam pipe. In the drying apparatus, the steam generated from the garbage flows out of the garbage flow path of the dryer, and is heated and pressurized by the heater and the pressurizer to become high-temperature and high-pressure steam. It flows into the road and heats the garbage in the garbage channel.

However, it is difficult for the steam generated from the garbage to generate a sufficient amount of heat as a heating source. Therefore, in the drying apparatus, the sensible heat of the steam is increased by heating the steam flowing through the steam pipe with a heater. Further, by pressurizing the steam flowing through the steam pipe with a pressurizer, condensation of the steam in the steam channel is promoted, and the amount of latent heat is increased.
JP 2002-243365 A

  As described above, in the drying apparatus, the amount of heat that is insufficient with the steam generated from the garbage 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. In addition, since the steam needs to be heated and pressurized significantly, the fuel consumption of the entire apparatus increases. Therefore, although the steam generated from the garbage is reused, a sufficient energy saving effect cannot be expected.

  This invention is made | formed in view of this point, The place made into the objective is providing the garbage drying machine and garbage drying system which are small or cheap and have little fuel consumption.

  A garbage dryer according to the present invention includes a first cylindrical body having a first steam flow path defined on the inside thereof, and surrounds the first cylindrical body, between the first cylindrical body and the first cylindrical body. A second cylindrical body that partitions and forms a garbage flow path for circulating the raw garbage, and a second steam flow path is defined between the second cylindrical body and surrounding the second cylindrical body. A third cylindrical body to be formed; conveying blades spirally arranged in the axial direction on the outer peripheral surface of the first cylindrical body or the inner peripheral surface of the second cylindrical body; and the first cylindrical body A rotation drive mechanism that conveys the garbage by rotating the tubular body provided with the conveying blades of the body or the second tubular body.

  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, it is a 1st steam flow path via a 1st cylindrical body. While being heated by the steam inside, it is heated by the steam in the second steam flow path via the second cylindrical body. Therefore, the garbage is heated from both sides of the first cylindrical body and the second cylindrical body while being stirred, and is efficiently dried. Therefore, it is possible to realize a garbage dryer with a small size and low fuel consumption.

  The first to third cylindrical bodies extend in the vertical direction, the rotational drive mechanism conveys garbage upward, and the first cylindrical body and the second cylindrical body are located on the upper side. Is preferably formed in a reverse tapered shape having a larger diameter than the lower side.

  Garbage is heat-dried by steam, rotates according to the rotation of the cylindrical body, and dehydrates under centrifugal force. According to the said garbage dryer, since the 1st cylindrical body and the 2nd cylindrical body are formed in reverse taper shape, the centrifugal force which acts on garbage becomes large, so that it goes to the upper side. For this reason, the garbage receives a large centrifugal force as it goes downstream in the conveying direction, and thus is efficiently dried.

  It is preferable that the conveyance blade includes a plurality of blade members that are spirally arranged upward and separated from each other.

  Thus, the garbage is conveyed upward by the blade member in the garbage flow path. 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.

  The garbage dryer is provided at a position higher than the suction port in the first steam flow path, and a siphon tube having a suction opening that opens in the first steam flow path. And a steam inflow portion for introducing steam into the steam flow path.

  Thus, when the steam in the first steam channel is condensed, the condensed water receives the pressure of the steam and is discharged through the siphon tube.

  The garbage dryer preferably includes a steam supply pipe connected to the third cylindrical body and configured to supply steam from a tangential direction to the second steam flow path.

  As a result, the steam is supplied from the steam supply pipe to the second steam channel from the tangential direction. Therefore, it becomes easy to distribute | circulate a vapor | steam uniformly in the 2nd steam flow path.

  The garbage flow path includes a garbage inflow portion provided on one end side of the first to third cylindrical bodies and a garbage outflow portion provided on the other end side of the first to third cylindrical bodies. The first and second steam flow paths are provided with a steam inflow portion provided on the other end side of the first to third tubular bodies, and one end side of the first to third tubular bodies. It is preferable to provide each with the steam outflow part provided in each.

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

  The rotational drive mechanism is configured to rotate the cylindrical body at least at a first rotational speed and a second rotational speed greater than the first rotational speed, and the first rotational speed is A part of the garbage falls from between the blade members, while the remaining garbage is set to be conveyed upward by the blade member, and the second rotation speed is set so that substantially all the garbage is the blades. It is preferably set so as to be conveyed upward by the member.

  Thus, during normal drying operation, the garbage can be efficiently dried by rotating the cylindrical body at the first rotation speed. On the other hand, at the end stage of the drying operation or the like, the rotational speed of the cylindrical body is increased to the second rotational speed, so that the garbage remaining in the garbage flow path is removed from the second cylindrical body by centrifugal force. It can be forcibly discharged along the inner surface.

  The garbage drying system which concerns on this invention partitions off the 1st partition member which partitions off the 1st steam flow path and the garbage flow path which distribute | circulates garbage, the 2nd steam flow path, and the said garbage flow path. A second partition member, and heating the garbage in the garbage channel with the steam in the first steam channel via the first partition member, and via the second partition member A dryer for drying by heating with steam in the second steam channel; a steam supply source for supplying steam to the first steam channel; and steam generated from the garbage in the garbage channel. A steam return passage that leads to the second steam flow path; and a heater that heats the steam in the steam return passage.

  According to the above garbage drying system, the steam generated from the garbage flows out from the garbage channel to the steam return passage, is heated by the heater, and then flows into the second steam channel. And the said steam heats the garbage in a garbage flow path through the 2nd partition member. Therefore, steam generated from garbage (hereinafter referred to as recovered steam) can be reused as a heating source. Further, since the garbage is heated by both the steam in the first steam channel and the recovered steam, the garbage can be sufficiently heated and dried even if the amount of recovered steam heated is relatively small. Therefore, a large heater and a pressurizing machine are unnecessary, and the fuel consumption of the entire apparatus can be suppressed to a small level. Therefore, it is possible to realize a garbage drying system that is small or inexpensive and consumes little fuel.

  The garbage drying system includes a steam supply passage that guides the steam supplied from the steam supply source to the first steam flow path, and the heater includes the steam in the steam supply path and the steam return path. It is preferable to provide a heat exchanger that exchanges heat with steam.

  Thus, the steam in the steam return passage can be heated using the steam in the steam supply passage as a heating source. Therefore, a separate new heating source is unnecessary, and the system can be downsized and the fuel consumption can be reduced.

  The garbage drying system includes a first condensed water channel that guides condensed water generated by condensation of the vapor in the first vapor channel to the vapor supply source, and the vapor supply source is the first condensed water channel. It is preferable that the condensed water is evaporated and supplied to the first steam flow path.

  As a result, the condensed water generated in the first steam channel is supplied again to the first steam channel as steam. Therefore, the condensed water can be reused as a heating source for garbage.

  It is preferable that the garbage drying system includes a dust collector for removing dust from the steam return passage.

  Thus, the steam generated from the garbage is supplied to the second steam flow path after being removed by the dust collector. Therefore, it is possible to clean the second steam flow path, and it is possible to suppress a decrease in efficiency of heat exchange via the second partition member.

  The dust collector is a wet dust collector, and the garbage drying system includes a second condensate channel that guides condensed water generated by condensation of steam in the second steam channel to the wet dust collector. preferable.

  Thereby, the condensed water produced in the second steam channel can be reused as treated water for dust collection.

  In addition, it is preferable that the said garbage drying system is equipped with the said garbage dryer as said dryer.

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

  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 drying system 3 includes a dryer 6, a boiler 7, and a wet dust collector 8.

  Inside the dryer 6, a first steam channel 51, a garbage channel 52 through which raw garbage flows, and a second steam channel 53 are partitioned. 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.

  The steam discharge part (not shown) of the boiler 7 and the first steam flow path 51 of the dryer 6 are communicated with each other via the 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 waste passage 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 gas outflow part of the wet dust collector 8 and the second steam channel 53 of the dryer 6 are connected via a third steam pipe 15. 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 first steam pipe 11 and the third steam pipe 15 are provided with a heat exchanger 9 that exchanges heat between the steam flowing in the first steam pipe 11 and the steam flowing in the third steam pipe 15.

  An exhaust pipe 18 is connected to the second steam channel 53 of the dryer 6. An exhaust fan 39 is provided on the downstream side of the exhaust pipe 18.

  The waste flow path 52 of the dryer 6 is connected to the collector 10 via the waste discharge pipe 17.

  Next, the configuration of the dryer 6 will be described. As shown in FIG. 2, the dryer 6 includes a dryer body 30 that heats and drys garbage and a collector 10 that stores the dried waste.

  The dryer main body 30 includes a cylindrical portion 31 including an inner cylinder 32, an outer cylinder 33 having a hollow double structure surrounding the inner cylinder 32, and a circular top plate 34 covering the upper ends of the inner cylinder 32 and the outer cylinder 33. It has. The inner cylinder 32 is formed in a reverse taper shape whose upper side has a larger diameter than the lower side. Specifically, as shown in FIG. 5, the inner cylinder 32 is a cylindrical body composed of an inverted frustoconical inner wall 32a having an apex angle of about 10 degrees and a circular bottom plate 32b having a depression 32c at the center. is there. On the other hand, the outer cylinder 33 is a cylindrical body composed of a cylindrical outer wall 33a, an inverted frustoconical inner wall 33b having an apex angle of about 10 degrees, and a circular bottom plate 33c.

  The outer diameter of the inner wall 32 a of the inner cylinder 32 is smaller than the inner diameter of the inner wall 33 b 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. The inner cylinder 32 is rotatably supported by a bearing (not shown). On the other hand, the outer cylinder 33 is fixed so as not to rotate.

  With the above configuration, the inside of the cylindrical portion 31 is between the first steam channel 51 inside the inner wall 32a, the dust channel 52 between the inner wall 32a and the middle wall 33b, and the middle wall 33b and the outer wall 33a. The second steam flow path 53 is partitioned.

  An opening 41 is formed at the center of the top plate 34, and a joint 35 is attached to the opening 41. The joint 35 has a double tube structure, and a siphon tube 36 is inserted into the joint 35. A gap between the inner peripheral surface of the joint 35 and the outer peripheral surface of the siphon tube 36 is a gas flow path that guides the steam from the first steam pipe 11 to the first steam flow path 51. Between the opening 41 of the top plate 34 and the outer peripheral surface of the siphon tube 36, an inflow port that guides steam to the first steam channel 51 is formed. As shown in FIG. 5, the siphon tube 36 extends in the vertical direction in the first steam channel 51. The opening 36a at the lower end of the siphon tube 36 enters the inside of the recess 32c of the circular bottom plate 32b and opens downward.

  As shown in FIG. 5, a dust supply port 42 is provided at the lower end of the inner wall 33 b of the outer cylinder 33. The dust supply port 16 is connected to the dust supply port 16 penetrating the outer wall 33a. In addition, although illustration is abbreviate | omitted, the screw which conveys garbage from the garbage hopper 5 is installed in the garbage supply pipe | tube 16 inside. The screw quantitatively feeds garbage into the garbage flow path 52.

  As shown in FIG. 2, a dust discharge port 48 is formed at the upper end of the inner wall 33 b of the outer cylinder 33. A waste discharge pipe 17 is connected to the waste discharge port 48. The upper top plate 34 is formed with a discharge port 37 for discharging the steam generated in the garbage flow path 52, and the second steam pipe 13 is connected to the discharge port 37.

  As shown in FIG. 3, a steam inlet 43 is formed in the upper part of the outer wall 33 a of the outer cylinder 33, and the third steam pipe 15 is connected to the steam inlet 43. Therefore, the steam from the third steam pipe 15 is introduced into the second steam channel 53 through the steam inlet 43. The third steam pipe 15 extends in the tangential direction of the outer wall 33a. The third steam pipe 15 is formed so as to introduce steam along the tangential direction.

  As shown in FIG. 5, the circular bottom plate 33c is formed with a discharge port (not shown) for discharging condensed water generated in the second steam flow path 53, and the second distribution pipe is formed in this discharge port. 14 is connected.

  As schematically shown in FIG. 6, a plurality of blades 70 spirally arranged upward are provided on the outer peripheral surface of the inner wall 32 a of the inner cylinder 32. These blades 70 are formed so as to convey the garbage upward. The outer edge of the blade 70 is slightly separated from the middle wall 33b of the outer cylinder 33, and a gap is provided between the blade 70 and the middle wall 33b. Since the blade 70 is provided on the outer peripheral surface of the inner wall 32a of the inner cylinder 32, the blade 70 is arranged according to the reverse tapered shape of the inner wall 32a. For this reason, the distance (rotation radius) between the rotation center and the blade 70 increases toward the upper side.

  Further, these blades 70 are arranged at regular intervals along the spiral direction. As shown in FIG. 7, in the present embodiment, the length L1 along the spiral direction of the blade 70 is equal to the length L2 of the gap between the blades 70. That is, in the plan view, the ratio between the area of the blade 70 and the area of the gap is 1: 1. The blade 70 is formed every 45 degrees around the center of rotation. However, the arrangement angle and area ratio of the blade 70 are not limited at all.

  As shown in FIG. 3, a motor 72 is attached to the side portion of the cylindrical portion 31 via an angle 38. A sprocket 74 a is fixed to the rotating shaft 73 a of the motor 72. The motor 72 is a motor whose rotation 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 72.

  As shown in FIG. 5, a rotating shaft 73 b is attached to the lower end portion of the inner cylinder 32. A sprocket 74b is fixed to the rotating shaft 73b. As shown in FIG. 3, a chain 75 is wound around the sprocket 74a of the motor 72 and the sprocket 74b. Thereby, when a switch (not shown) of the controller 76 is turned ON, the motor 72 is started and the inner cylinder 32 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.

  As shown in FIG. 1, the high-temperature steam supplied from the boiler 7 flows through the first steam pipe 11, heats the steam in the third steam pipe 15 in the heat exchanger 9, and then the second steam of the dryer 6. 1 flows into the steam channel 51. The steam that has flowed 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 siphon pipe 36 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).

  The garbage is conveyed upward in the garbage flow path 52. At this time, the garbage is heated by the steam in the first steam channel 51 through the inner wall 32a and is also heated by the steam in the second steam channel 53 through the inner wall 33b. The garbage is agitated in the garbage flow path 52. As a result, water contained in the garbage is evaporated and the garbage is dried.

  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 dust channel 52 is led to the wet dust collector 8 through the second steam pipe 13, and is dedusted and deodorized in the wet dust collector 8. The dust-removed steam flows through the third steam pipe 15 and exchanges heat with the high-temperature steam in the first steam pipe 11 in the heat exchanger 9. As a result, the steam in the third steam pipe 15 is heated, the temperature rises, and becomes high-temperature steam that is introduced into the second steam channel 53 of the dryer 6. The steam flows downward in the second steam flow path 53 and heats the garbage in the waste flow path 52 through the middle wall 33b. The steam which heated the garbage is cooled, and a part or all of it is condensed to become condensed water. The condensed water in the second steam channel 53 is supplied to the wet dust collector 8 through the second water distribution pipe 14 and reused in the wet dust collector 8.

  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, the dust is conveyed from the lower part to the upper part of the garbage channel 52 by the quantitative supply of the garbage to the garbage channel 52 by the screw and the rotation of the inner cylinder 32, and continuously from the garbage outlet 48. It is the operation to discharge to. In normal operation, the controller 76 operates the motor 72 at a predetermined rotation speed (hereinafter referred to as the first rotation speed).

  Specifically, in normal operation, the garbage stored in the garbage hopper 5 is conveyed by the screw and pushed into the garbage flow path 52 through the garbage supply port 42. The garbage once pushed into the garbage flow path 52 is also conveyed upward by the garbage pushed in later. Further, when the inner cylinder 32 is rotated, the blade 70 is also rotated integrally with the cylinder 32 and conveys waste upward.

  By the way, as described above, a gap is formed between the adjacent blades 70. Therefore, some garbage on the blade 70 naturally falls through the gap between the blades 70. As a result, the garbage is effectively agitated by repeating conveyance and dropping.

  The garbage is dried by absorbing heat from the steam in the first steam channel 51 and the second steam channel 53 while being conveyed by the blade 70. Then, the dried raw garbage is conveyed to the uppermost part of the garbage flow path 52 and is collected by the collector 10 through the garbage discharge pipe 17.

  By the way, in normal operation, when the garbage is discharged from the garbage flow path 52, the conveying force of the garbage by the screw is used. For this reason, when the conveyance of the garbage from the screw is completed, it becomes difficult to smoothly discharge the garbage from the garbage channel 52 thereafter. That is, in the final stage of processing, the discharge speed of the garbage from the dryer 6 becomes slow. Further, if the supply of garbage by the screw is stopped at the time of inspection or the like, it becomes difficult to discharge garbage after that. In this case, the garbage inside the dryer 6 must be removed manually, which requires troublesome work. Therefore, in the present dryer 6, in the above-described case, waste is smoothly discharged from the dryer 6 by executing the following high-speed operation.

  In high-speed operation, first, the screw 61 is stopped and the supply of dust is stopped. Thereafter, the controller 76 controls the inner cylinder 32 to rotate at a high speed. That is, the rotational speed of the motor 72 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, since the blade 70 provided in the inner cylinder 32 also rotates at a high speed, the garbage in the garbage flow path 52 is conveyed at a higher speed. Further, a greater centrifugal force is applied to the garbage than during normal operation. Therefore, garbage rises smoothly along the inner peripheral surface of the inner wall 33b. As a result, even though a gap is formed between the blades 70, all or almost all of the garbage in the garbage flow path 52 reaches the top of the garbage flow path 52, and the waste discharge port 48 is connected to the outside. Will be discharged.

  As described above, according to the present embodiment, the steam generated from the garbage when 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 heat and pressurize the steam separately. However, in the present garbage drying system 3, the generated steam of the boiler 7 is used together, and the heat of the generated steam of the boiler 7 is used for heating the steam generated from the garbage by the heat exchanger 9. Therefore, it is possible to obtain a sufficient amount of heat as a waste heat source without using a large apparatus such as a heater or a pressurizer. Therefore, the apparatus can be reduced in size.

  Further, according to the present embodiment, the flow direction of each steam in the first steam flow path 51 and the second steam flow path 53 and the flow direction of the waste in the waste flow path 52 inside the dryer 6, It was decided to face each other. 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 blades 70 are arranged in a spiral shape with a certain interval, so that the dust naturally falls through the gap while being transported to the blades 70 by the rotation of the inner cylinder 32. By repeating this conveyance and dropping at each stage, waste can be frequently stirred, so that more efficient drying can be performed.

  Since the inner wall 32a of the inner cylinder 32 and the inner wall 33b of the outer cylinder 33 are formed in a reverse taper shape and the waste is transported upward, the waste is disposed toward the downstream side of the garbage flow path 52 in the transport direction. The peripheral speed of becomes faster. Therefore, the stirring effect can be improved. In addition, the dust is well stirred in the upper portion of the dust flow path 52 that is at a higher temperature, so that the drying efficiency can be increased.

  Moreover, in this dryer 6, the 3rd steam piping 15 which supplies a vapor | steam to the 2nd steam flow path 53 is formed so that a vapor | steam may be supplied from the tangential direction of the outer wall 33a. Therefore, it becomes easy to supply steam uniformly in the 2nd steam flow path 53, and the drying efficiency of garbage can be improved.

  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 the steam is removed by 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 the scale can be prevented from adhering to the inner wall 33b. 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.

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

It is a block diagram of a garbage disposal apparatus. It is a longitudinal cross-sectional view of a dryer. It is a side view of a dryer. It is a top view of a dryer. FIG. 3 is an enlarged view of the vicinity of part A in FIG. 2. It is the perspective view which represented the principal part of the dryer notionally. It is a cross-sectional view of the main part of a dryer.

Explanation of symbols

7 Boiler (steam supply source)
11 First steam pipe (steam supply passage)
12 1st water pipe (1st condensed water channel)
14 Second water pipe (second condensate channel)
15 3rd steam pipe (steam return passage)
32a Inner wall (first cylindrical body, first partition member)
33a outer wall (third cylindrical body)
33b Middle wall (second cylindrical body, second partition member)
51 First steam channel 52 Garbage channel 53 Second steam channel 70 Blade (conveying blade, blade member)
72 Motor (rotary drive mechanism)

Claims (13)

A first tubular body having a first steam flow path defined inside;
A second cylindrical body that surrounds the periphery of the first cylindrical body and defines a garbage flow path for distributing the garbage between the first cylindrical body;
A third cylindrical body surrounding the second cylindrical body and defining a second steam flow path between the second cylindrical body;
Conveying blades arranged spirally in the axial direction on the outer peripheral surface of the first cylindrical body or the inner peripheral surface of the second cylindrical body;
A rotation drive mechanism for conveying the garbage by rotating the cylindrical body provided with the conveying blades of the first cylindrical body or the second cylindrical body;
Garbage dryer equipped with. The first to third cylindrical bodies extend in the vertical direction,
The rotational drive mechanism conveys garbage upward,
2. The garbage dryer according to claim 1, wherein the first cylindrical body and the second cylindrical body are formed in a reverse taper shape having a larger diameter on the upper side than on the lower side.   The garbage dryer according to claim 2, wherein the conveying blade includes a plurality of blade members that are spirally arranged upward and separated from each other. A siphon tube having an inlet opening in the first steam flow path;
A steam inflow portion that is provided at a position higher than the suction port in the first steam flow path, and introduces steam into the first steam flow path;
The garbage dryer of Claim 2 or 3 provided with these.   The garbage drying machine as described in any one of Claims 1-3 provided with the vapor | steam supply pipe | tube connected to a said 3rd cylindrical body and supplying a vapor | steam to a said 2nd vapor flow path from a tangential direction. . The garbage flow path includes a garbage inflow portion provided on one end side of the first to third cylindrical bodies and a garbage outflow portion provided on the other end side of the first to third cylindrical bodies. And
The first and second steam flow paths are provided on the steam inflow portion provided on the other end side of the first to third cylindrical bodies and on one end side of the first to third cylindrical bodies. The garbage dryer as described in any one of Claims 1-3 each provided with a steam outflow part. The rotational drive mechanism is configured to rotate the cylindrical body at least at a first rotational speed and a second rotational speed greater than the first rotational 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,
4. The garbage dryer according to claim 3, wherein the second rotation speed is set so that substantially all garbage is conveyed upward by the blade member. A first partition member that partitions the first steam channel and the garbage channel that circulates garbage, and a second partition member that partitions the second steam channel and the garbage channel, The garbage in the garbage channel is heated with the steam in the first steam channel via the first partition member, and with the steam in the second steam channel via the second partition member. A dryer to dry by heating;
A steam supply source for supplying steam to the first steam flow path;
A steam return passage for guiding the steam generated from the garbage in the garbage channel to the second steam channel;
A heater for heating the steam in the steam return passage;
Garbage drying system equipped with. A steam supply passage for guiding the steam supplied from the steam supply source to the first steam flow path;
The garbage drying system according to claim 8, wherein the heater includes a heat exchanger that exchanges heat between the steam in the steam supply passage and the steam in the steam return passage. Comprising a first condensate channel that leads condensed water generated by condensation of steam in the first steam channel to the steam supply source;
The said garbage supply source is a garbage drying system of Claim 8 or 9 which evaporates the condensed water of a said 1st condensed water path, and supplies it to a said 1st steam flow path.   The garbage drying system as described in any one of Claims 8-10 provided with the dust collector which removes the vapor | steam of the said vapor | steam return path. The dust collector is a wet dust collector,
The garbage drying system of Claim 11 provided with the 2nd condensed water path which guides the condensed water produced by the vapor | steam in the said 2nd steam flow path to the said wet dust collector. The garbage drying system as described in any one of Claims 8-12 provided with the garbage dryer as described in any one of Claims 1-7 as said dryer.

Images