JP3155528B2 - Flash dryer with wind sorting function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a method of wind-sorting crushed material or the like by an air flow, and floating the dried material which is separated and conveyed by the air flow, while drying it while passing through a spiral path. The present invention relates to a flash drying device having a wind sorting capability.

[0002]

2. Description of the Related Art The Packaging Recycling Law was enacted in 2000, and there has been a long-awaited need for the development of a sorting apparatus for selecting various types of packages according to their materials. In order to respond to this, the object to be treated obtained by crushing the object into small pieces is sorted out by, for example, a rising duct by wind force, and a cyclone separator is used to separate lightweight objects including plastic, paper, cloth, and the like. A technology for reusing waste, which is formed by molding such a lightweight material into pellets and effectively utilizing it as a raw material for recycled fuel, various recycled molded products, and the like, has been developed.

[0003]

However, in such waste recycling technology, water is often mixed and wetted under various conditions regardless of general garbage or industrial waste, and drying is also an important subject. It has become. In particular, an efficient and simple device for wind sorting and drying a large amount of waste has not yet been developed. The present invention has been proposed in view of the above-mentioned conventional circumstances, and its purpose is to air-select and dry a large amount of waste with an air stream and to dry the material. Accordingly, there is provided an airflow drying apparatus with a wind separation function that can set a sufficiently long drying passage length while maintaining a compact structure, can be configured to be easily monitored and maintained, and can further increase the effective use efficiency of heat. Things.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, an airflow drying apparatus with a wind separation function according to the present invention comprises a heater for heating an air flow used for wind separation, and a lower part connected to the heater. A wind separation pipe equipped with a seal valve for discharging heavy loads at a lower end thereof, a feeder connected to an intermediate portion of the wind separation pipe and supplying a selected object to the wind separation pipe, A vortex airflow path is formed by a partition plate that is connected to the upper end of the pipe at an inlet and is spirally bent between a pair of plates, and is formed by the partition plate at the vortex outer peripheral portion of the airflow path or formed on the plate. It has an outer peripheral opening formed and a central opening formed in the plate at the center of the vortex, and the air flow and the object to be dried conveyed by the air flow are supplied from either one of the openings. A flash dryer for drying the object to be dried while being discharged from the other outlet of the opening, and a suction blower connected to the outlet of the flash dryer and generating the air flow, The flash dryer is
A plurality of plates are separably stacked, and the plates to be stacked are formed of a common plate. In the case of an odd number, the other one pair of adjacent outer peripheral openings is communicated with each other, leaving one outer open outer peripheral opening, A pair of adjacent central openings are communicated from the central opening side corresponding to the open outer peripheral opening, and the remaining central openings are open to the outside, and in the case of a plurality, two outer peripheral openings on both outer sides. , The other pair of adjacent outer peripheral openings on the other inner side are communicated with each other, and the pair of adjacent central openings are sequentially communicated with each other at the central opening.

[0005] Therefore, the air stream is heated by the heater and then used for air separation, and the object to be dried is dried in advance during the air separation in order to dry the object through the flash dryer as it is. It is possible to perform a process suitable for the next process operation that dislikes moisture. In addition, because of the use of an air flow, a large amount of wind separation and drying can be performed with a simple configuration. Since the vertical pipe for wind power sorting is equipped with a seal valve for discharging heavy loads at the lower end, there is almost no disturbance of the air flow when discharging the wind-selected heavy loads. The material that has been sorted by the wind, conveyed by an air stream, and dried by a flash dryer can be separated by a cyclone separator or discharged from a suction blower.

In the flash dryer, a long spiral air flow passage is formed by a spirally bent partition plate between a pair of plates, so that a compact structure can be maintained.
Even if the material to be dried conveyed by the airflow is wet, it is dried in advance from the air separation even if it is wet, and a sufficient drying time is secured in a longer airflow passage to completely dry the material. The inlet of the air flow is formed by a partition plate at the outer periphery of the vortex,
Alternatively, the device can be set to either an outer peripheral opening formed in the plate at the outer peripheral portion thereof, or a central opening formed in the plate at the center of the vortex, and the other opening can be set as an air flow outlet. Can be properly adapted to the installation conditions. In addition, the length of the airflow passage can be increased by stacking the airflow drying devices according to the degree of wetting and the amount of the object to be dried. An inlet and an outlet can be set, and when a plurality of them are overlapped, either one of the outer peripheral openings on both outer sides can be set as an inlet and an outlet of an air flow. Inspection and cleaning are also performed on the inner air flow passage by separating each common plate.

[0007]

[0008]

In the flash drying apparatus with a wind separation function according to the present invention, each of the above-mentioned plates is configured to be separable, and at least one of the outer plates may be provided with an inspection window. Is inspected and the plate is released as needed for cleaning.

[0010]

[0011] In the flash drying apparatus with a wind separation function of the present invention, the wind separation vertical pipe and the flash drying apparatus may be configured such that their outer surfaces are covered with a heat insulating material. Radiation cooling from the outside can be prevented by the heat insulating material on the outer surface, and the effective use efficiency of heat can be increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail below with reference to the accompanying drawings by way of an example of a flash drying apparatus having a wind separation function. FIG. 1 is a partially cutaway elevation view of a flash drying apparatus with a wind separation function according to a representative embodiment of the present invention, and FIG. 2 is a schematic perspective view of a double-flow flash drying apparatus incorporated in the flash drying apparatus. 3 is a schematic perspective view showing a basic structure of the flash dryer, FIG. 4 is a plan view of a triple flash dryer, and FIG. 5 is a plan view of a quadruple flash dryer.

As shown in FIG. 1, a flash drying apparatus 1 having a wind sorting function includes a heater 41 for heating an air flow A1 used for wind sorting, and a lower header 51 attached to the heater 41.
And a lower end 52 having a zigzag-shaped wind separation passage 55 equipped with a rotary seal valve or a double damper valve V1 at the lower end 52 for discharging heavy pieces H such as iron pieces such as pots and blades and stones and glass. And a feeder 45 connected to the intermediate portion 53 of the vertical pipe 50 and supplying the object W to the vertical pipe 50, and connected to the upper end 54 of the vertical pipe 50 at the inlet at the inlet, and the air flow A1 Dryer 20 for drying the light-weight material L conveyed by the dryer, and an inlet 6 at an outlet 25 of the dryer 20.
1, a cyclone separator 60 that separates and collects the dried lightweight material L from the air flow A1,
And a suction blower 65 which is connected to the air outlet 62 for generating the air flow A1. The useful materials in the heavy goods H are sorted out in a separate process, such as iron, aluminum, and brass.

The heater 41 for heating the air flow A1 uses steam, electricity, combustion gas such as oil or gas, hot water, or the like as a heat source, and the heating temperature is set according to the type of the material W to be dried. For example, if the material to be dried includes a sheet of paper, cloth, or low-density polyethylene, or if it is wood flour or grain, the sheet may be melted so as not to adhere to the walls of the passages 14 and 55 and a fire or a fire may occur. Set to about 60 ° C to avoid burning, about 90 ° C to about 110 ° C for wood chips, sludge, and sand
, But the set temperature can be changed as appropriate. A suction type blower can be combined with the heater, but the suction type is advantageous because the inside of the passages 14 and 24 is slightly negative pressure, and drying of the object to be dried is promoted.

The wind separation vertical pipe 50 is formed by a pair of zigzag bent plates 5 between a pair of vertically long plates 56.
7 form a zigzag-shaped wind sorting path 55. The plate 56 is detachable, so that cleaning can be appropriately performed when cleaning through the inspection window 58 is necessary. The vertical pipe 50 is connected to the heater 41 by a header 51 at a lower portion thereof, and has a lower end 52 mounted with a rotary seal valve or a double damper valve V1 for discharging heavy materials H. The vertical pipe 50 is kept warm by a heat insulating material 59 over the entire outer surface. The vertical pipe is formed into a spiral shape or a straight tube in addition to the zigzag shape. The feeder 45 that supplies the selected material W to the vertical pipe 50 is a screw that supplies the selected material W supplied from the quantitative supply device 49 to the intermediate portion 53 of the vertical pipe 50 via the rotary seal valve or the double damper valve V3. It consists of a feeder. The material to be sorted W is continuously supplied to the quantitative feeder 49 from the crusher.

As shown in FIG. 2, a double type flash dryer 2
Reference numeral 0 denotes a first air flow path 1 in which a pair of plates 11, 21 and 21, 22 form spiral air flow paths 14, 24 for drying by partition plates 13, 23 bent in a spiral shape.
The outer peripheral opening 15 of the inlet formed by the partition plate 13 at the outer peripheral part of the vortex 4 is the upper end 5
4 is connected. A central opening 16 formed in the intermediate plate 21 at the center of the vortex so as to form an outlet of the first airflow passage 14 serves as an inlet of the second airflow passage 24. The outer peripheral opening 25 at the outlet of the second airflow passage 24 is connected to the inlet 61 of the cyclone separator 60. The outlet 62 of the cyclone separator 60 is connected to a suction blower 65 that generates the air flow A1, and the air flow A1 is discharged through a silencer 69. The dried lightweight material L is taken out from the rotary seal valve V2 at the lower end of the cyclone separator 60 without disturbing the air flow A1.

In the above configuration, the air flow A1 is supplied to the heater 41.
In order to dry the relatively light object L to be dried, which is used in the air separation after being heated in the air flow A1 through the flash dryer 20, the object to be dried is also subjected to the air separation in advance during the air separation. (Lightweight material) L can be dried, and a process suitable for the next process operation that dislikes moisture can be performed. In addition, since the air flow A1 is used as the transport medium, a large amount of wind separation and drying can be continuously performed with a simple configuration. Since the vertical pipe 50 for performing the wind separation has the seal valve V1 for discharging the heavy material at the lower end, the air flow is hardly disturbed when the heavy material H that has been subjected to the wind separation is discharged.

The material L, which is separated by wind, conveyed by an air stream and dried by the flash dryer 20, is supplied to a cyclone separator 60.
Separated by In the flash dryer 20, a pair of plates 1
Long spiral air flow path 1 between 1, 21 and 21, 22
The compact structure can be maintained due to the formation of 4, 24, and the object to be dried L conveyed by the air flow is dried in advance from the wind separation even if it is wet, so that it is sufficient in the long air passage. Drying time is ensured, and drying is completed.

As shown in FIG. 3, in the flash drying apparatus 10 having a basic configuration, a pair of parallel substantially rectangular plates 11 are provided.
A vortex airflow passage 14 is formed between the 12 by a partition plate 13 that is vortex-shaped like a mosquito coil. At the outer peripheral portion of the vortex of the air flow passage 14, an outer peripheral portion opening 15 is formed by the extension portion 13 </ b> A of the partition plate 13 and the auxiliary plate 13 </ b> B.
Are formed. A central opening 16 is formed in one plate 11 at the center of the vortex, and a short pipe 16A is connected to the central opening 16. As shown by a solid arrow YI, when the inlet for supplying the dry air flow together with the object to be dried is the outer peripheral opening 15, the central opening 16 serves as an outlet to allow the dried object to dry together with the air flow. It comes out as shown by. The plates 11 and 12 are separable, and have a configuration in which the passage 14 can be cleaned. In addition, an inspection window 18 of the passage 14 is provided on one of the plates 11 and 12.
Is provided as appropriate.

The air flow passage 14 is formed so as to have a substantially constant cross-sectional area over the entire length in order to keep the air flow velocity substantially constant so that the material to be dried does not stay. A long spiral airflow passage 14 is formed by a partition plate 13 that is spirally bent between the pair of plates 11 and 12,
It has a compact structure due to its spiral shape.
Further, even if the material to be dried conveyed by the dry air flow is wet, a sufficient drying time is ensured in the long air flow passage and the material to be dried is completely dried. In addition to this, the central opening 16 can be used as an inlet and the outer peripheral opening 15 can be used as an outlet, as indicated by phantom arrows ZI and ZO, depending on installation and piping conditions.
The outer periphery opening can be provided in one or both plates 11 and 12 at the outer periphery of the vortex, and the central opening can be provided in both plates 11 and 12. The plates 11 and 12 do not necessarily have to be parallel, but are preferably parallel because they do not significantly change the airflow velocity.

The flash dryer 20 having the most practical configuration shown in FIG. 2 has a configuration in which two units of the above-described basic configuration are separated from each other so as to communicate with each other through a central opening 26. Although the members having the same function are denoted by the same reference numerals, description will be made mainly on different configurations. In the illustrated example, the first side of the inlet side is used to turn the inlet and the outlet to opposite sides.
In the unit and the second unit on the outlet side, a spiral partition plate 1
Reference numerals 3 and 23 are reversed for right and left winding. When the inlet and the outlet are provided on the same side, the winding directions of the partition plates 13 and 23 may be the same. The plates to be stacked are constituted by a common plate 21, and a connection central portion opening 26 of each unit is formed in the central portion thereof. This configuration,
When the amount of the material to be dried is large and the degree of wetting is severe, the length of the air flow passages 14 and 24 can be increased, which is advantageous for drying. Inspection and cleaning of the air flow passages 14 and 24 are performed by separating the plates 11, 21 and 22.

As shown in FIG. 4, the flash drying apparatus 30 having a triple structure has an entrance and an exit formed by an outer peripheral opening 15 and a central opening 36. As shown in the drawing, when the outer peripheral opening 15 is used as an inlet and the central opening 36 is used as an outlet, the first central opening 16 and the second central opening 26 communicate with each other in the common plate 21 through the communicating central opening. 26 are integrally formed. The outer peripheral opening 25 of the second stage and the outer peripheral opening 35 of the third stage are connected by a connecting pipe 29,
The third-stage central opening 36 is an outlet. Of course, the inlet may be the central opening 36 and the outlet may be the outer peripheral opening 15. As shown in FIG. 5, the flash drying device 40 having a quadruple configuration is configured by connecting the outer peripheral openings 25 and 35 of the two devices 2 having the double configuration in FIG.

In any of the above arrangements, a heater for replenishing heating is provided on the outer plate in accordance with the degree of wetting of the object to be dried.
The outer surfaces of the plates 0 to 40 and the partition plate can be covered with a heat insulating material, so that radiant cooling can be prevented and the drying efficiency can be increased.

[0024]

As is apparent from the above description, according to the flash drying apparatus with a wind sorting function according to claim 1 of the present invention, a heater for heating an air flow used for wind sorting is provided;
A wind-selecting vertical pipe connected to the heater at the lower portion and mounted at the lower end with a seal valve for discharging heavy loads, and a supply connected to an intermediate portion of the wind-selecting vertical pipe to supply the selected articles to the wind-selecting vertical pipe. Machine, connected at the inlet to the upper end of the wind separation vertical pipe at the inlet, forming a spiral airflow path by a partition plate bent in a spiral between a pair of plates, by the partition plate at the vortex outer peripheral portion of the airflow path Having an outer peripheral opening formed or formed in the plate and a central opening formed in the plate at the center of the vortex, the air flow and the conveyed by the air flow from one of the inlets of these openings. An airflow dryer for drying the object to be dried while the object to be dried is supplied and discharged from the other outlet of the opening, and a suction blower connected to the outlet of the airflow dryer to generate the air flow. Structure Since the airflow is heated by a heater and then used for air separation, the object to be dried is passed through a flash dryer to dry the object during air separation in advance. It is possible to perform a process suitable for the next process operation that dislikes moisture.

Further, since an air flow is used, a large amount of wind separation and drying can be performed with a simple structure. Since the vertical pipe that performs the wind separation has a seal valve for discharging a heavy load at the lower end, there is almost no disturbance of the air flow when discharging the heavy load that has been subjected to the wind separation. The material that has been sorted by the wind, conveyed by an air stream, and dried by a flash dryer can be separated by a cyclone separator or discharged from a suction blower. In a flash dryer, a long spiral airflow path is formed by a spirally bent partition plate between a pair of plates, so that a compact structure can be maintained. However, drying is performed in advance during the air separation, and a sufficient drying time is secured in a longer airflow passage to completely dry the air. The inlet of the air flow can be formed by a partition plate at the outer periphery of the vortex, or can be set to either an outer peripheral opening formed at the outer peripheral portion of the plate or a central opening formed at the plate at the center of the vortex. In addition, the remaining other opening can be set as an outlet of the air flow, and can be appropriately adapted to the installation conditions of the present apparatus.

Further, according to the flash drying apparatus having the wind separation function, a plurality of the flash drying apparatuses are stacked so as to be separable, and the stacked plates are constituted by common plates.
In the case of an odd number, a pair of adjacent outer peripheral openings are communicated with each other while leaving one outer open outer peripheral opening, and a pair of adjacent central portions from the central opening side corresponding to the open outer peripheral opening. The central opening is open to the outside, the remaining central opening is open to the outside, and in the case of a plurality, the adjacent two outer peripheral openings are connected to each other except for two outer peripheral openings on both outer sides. Since the central opening is characterized by the fact that a pair of adjacent ones are sequentially communicated with each other, the length of the air flow passage is increased by stacking the air flow drying devices according to the degree of wetting of the material to be dried and the amount thereof. When an odd number is overlapped, either the outer peripheral opening or the central opening can be set as the inlet and outlet of the air flow. And exit can be set. Inspection and cleaning are also performed on the inner air flow passage by separating each common plate.

[0027]

Each of the above-mentioned plates is configured to be separable, and at least one of the outer plates may be provided with an inspection window. Done.

[0029]

The above-mentioned wind separation vertical pipe and the flash dryer are
The outer surfaces thereof can be configured to be covered with a heat insulating material, and radiant cooling from the wind-selecting vertical pipe and the flash dryer can be prevented by the heat insulating material on the outer surface, so that the effective use of heat can be increased.

[Brief description of the drawings]

FIG. 1 is a partially cutaway elevation view of a flash drying apparatus with a wind separation function according to a representative embodiment of the present invention.

FIG. 2 is a schematic perspective view of a double-layer flash dryer incorporated in the flash dryer.

FIG. 3 is a schematic perspective view showing a basic configuration of the flash dryer.

FIG. 4 is a plan view of the flash dryer having the triple configuration.

FIG. 5 is a plan view of the flash dryer having the same four-layer configuration.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Flash-flow drying apparatus with a wind separation function 10 Basic-structure flash-dryer 20 Double-structure flash-dryer 30 Triple-layer flash-dryer 40 Quadruple-structure flash-dryer 11, 12 Plate 13 Partition plate 14 Air-flow path 15 Outer peripheral opening 16 Central opening 18 Inspection window 21 Shared plate 22 Plate 25 Second stage outer peripheral opening 26 Communication center opening 41 Heater 45 Feeder 50 Wind separation vertical pipe 51 Lower part 52 Lower end 53 Middle part 54 Upper end 53 Middle Part 59 Insulation material 60 Cyclone separator 65 Suction blower A1 Air flow V1, V3 Rotary seal valve (or double damper valve) W Sorted material L Dry material (light weight)

Claims (3)

(57) [Claims] 1. A heater for heating an air flow used for wind separation, a wind separation pipe connected to the heater at a lower portion, and having a seal valve for discharging a heavy material at a lower end, and a wind separation pipe. And a feeder connected to the middle part of the wind-selecting vertical pipe for supplying the object to be sorted, and a feeder connected to the upper end of the wind-selecting vertical pipe at the inlet and swirled by a spirally bent partition plate between a pair of plates. Having an outer peripheral opening formed by the partition plate or formed in the plate at a vortex outer peripheral portion of the air flow passage, and a central opening formed in the plate at a vortex central portion. A flash dryer for drying the object to be dried while the airflow and the object to be dried conveyed thereby are supplied together from one of the inlets of the openings and discharged from the other outlet of the opening; Flash drying And a suction blower connected to the outlet of the device and configured to generate the airflow.In the flash drying device with a wind separation function, a plurality of the flash dryers are stacked so as to be separable, and the stacked plates are formed from a common plate. In the case of an odd number, a pair of adjacent outer peripheral openings are communicated with each other while leaving one open outer peripheral opening on the outside, and a pair of adjacent outer peripheral openings from the central opening corresponding to the open outer peripheral opening is formed. Are connected to each other, and the remaining central openings are open to the outside.
A pair of adjacent outer peripheral openings on the other inner side are communicated with each other while leaving the outer peripheral openings, and a pair of adjacent central openings are sequentially communicated with each other at the central opening. Flash drying equipment. 2. Each of the plates is configured to be separable,
The apparatus according to claim 1, wherein at least one of the outer plates is provided with an inspection window. 3. The apparatus according to claim 1, wherein the wind-screening vertical pipe and the flash dryer have outer surfaces covered with a heat insulating material.