JP2001227862A - Drying and sorting apparatus for rdf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for drying and sorting RDF in a compact structure. SOLUTION: The apparatus is provided with an RDF discharging portion 24 in the bottom of a vertical cylinder, and an air supplying pipe 27 tangentially connected to an air blower 28 in the lower portion of a separator side 23 having an outlet 25 in its top. A screw feeder 29 is connected to the upper side wall of the separator side 23. The RDF 14 including a defective mold 17 supplied from a compressor mold in an RDF manufacturing facility is fed in the screw feeder 29. A trap 31 is provided in the downstream side of the outlet 25 of the separator side 23. A circulating flow is generated from the upper to the lower outlet 25 in the separator side 23 by the airflow blown into the air supplying pipe 27, and the RDF 14 is gradually lowered due to its gravity in the circulating airflow, followed by collecting from the RDF discharging portion 24 after cooling and drying during lowering of the RDF 14. A lighter defective mold 17 is blown out by the circulating airflow and sent to the trap. Thereafter, the mold is separated for collection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RDF drying and sorting apparatus used for drying and sorting RDF after compression molding in an RDF manufacturing facility.

[0002]

2. Description of the Related Art In recent years, it has been attempted to recycle resources by treating and processing municipal solid waste (combustible waste).
(Garbage solid fuel).

As shown in FIG. 6, an RDF manufacturing facility that manufactures such RDF receives refuse 2 collected by a refuse collection vehicle 1 or the like, and receives refuse pits 3 of a supply facility.
The garbage 2 stored in the garbage pit 3 is sent to the primary crusher 5 by the garbage conveyor 4 for primary crushing, and the crushed garbage 2 is sent to the secondary crusher 7 by the conveyor 6.
The secondary crusher 7 performs secondary crushing to a size suitable for solid fuel conversion, and then sends the secondary crushed refuse 2 to a noncombustible material sorter 9 by a conveyor 8, and the noncombustible material sorter 9. In order to remove heavy non-combustible materials, for example, metals, glass, ceramics, etc., the combustible waste after the non-combustible materials are removed 2
To the main reactor (kneader) 11 on the conveyor 10,
The pH is adjusted by adding and kneading CaO or Ca (OH) ₂ as an additive, and the pH-adjusted refuse 2 is sent to a compression molding machine 13 by a compression molding machine supply feeder 12 to be solidified into a required shape. The RDF 14 is used.

Further, since the RDF 14 compression-molded by the compression molding machine 13 is at a high temperature, the compression-molded RDF 14 is passed through a conveyor 15 to a ventilation type dryer 1.
6 in the dryer 16, while the RDF 14 is slowly dropped downward from above by an internal fin operated by an electric motor (not shown), the RDF 14 is cooled by cold air at the atmospheric temperature, and the water content is reduced to, for example, 10%. %
It is made to dry as follows. The RDF 14 molded by the compression molding machine 13 contains about 20% of RDF defective molded bodies 17 that do not meet predetermined specifications due to cracking or breaking. The RDF 14 after the drying process is sent to an RDF sorter 19 of an electric vibration sieving type by a conveyor 18 and the RDF
In the DF sorter 19, the defective molded product 1 is sifted through an electric sieve (not shown) such as a 10 mm mesh.
7 to be removed by filtration.
4 is sent to an RDF stock yard 21 by a conveyor 20 for storage. On the other hand, defective moldings 17 selected from the RDF 14 are sent to a garbage pit 3 or a compression molding machine supply feeder 12 by a return conveyor 22. It is used again as a raw material for manufacturing RDF14.

[0005]

However, in the above-mentioned conventional RDF manufacturing facility, the drying process of the RDF 14 and the RDF
Since the process of sorting the defective compact 17 from the DF 14 is performed as a separate process by the independent dryer 16 and the RDF sorter 19, the dryer 16 and the RDF sorter 1
It takes a lot of space to install 9 and each,
In addition, there is a problem that maintenance must be performed individually, and equipment cost increases because a conveyor 18 for sending the RDF 14 after the drying process by the dryer 16 to the RDF sorting machine 19 is required. ,
Further, the dryer 14 has an electric motor for operating the internal fins, and the RDF sorter 19 has an electric sieve. Therefore, electric power is required, the electricity cost is increased, and there are many movable parts. There is a problem that the failure rate may increase. Further, since the return conveyor 22 is used to send the defective molded body 17 to the waste pit 3 or the compression molding machine supply feeder 12, the return conveyor 22 Motive power is also required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an RDF drying / sorting apparatus which can simultaneously perform drying of RDF and sorting of defective moldings and can be installed in a narrow space. .

[0007]

According to the present invention, in order to solve the above-mentioned problems, a required length in the vertical direction is set at a bottom, and
An RDF supply device in which a DF discharge section is provided and an air supply pipe is tangentially connected to a lower portion of a cylindrical separation body having an air outlet at the top, and a defective molded article is mixed, It is installed at the upper position of the separating body, and the RDF and the defective molded body supplied from the supply device are blown into the separating body from the air supply pipe and lifted based on the weight difference in the air. It is configured to be sorted, cooled and dried.

[0008] By blowing air into the separation body from the air supply pipe, a swirling flow of air from below to the upper outlet is formed in the separation body, and a defective molded body is formed in the separation body. When mixed RDF is input, RD
F is retained in the swirling flow of the air for a required time and is gradually lowered toward the bottom of the separation body, whereupon it is cooled and dried by the passing air, and thereafter, The RDF that has reached the bottom is collected from the RDF discharge section. On the other hand, since the weight of the defective molded body is lighter than that of the RDF, it is blown off by the swirling flow of the air and discharged together with the air from the outlet of the separation body. Sorting and separation of the compact are performed.

Further, if a plurality of air supply pipes are tangentially connected to the lower part of the separation body so as to have the same swirling flow, more air can be blown into the separation body and the air can be blown into the separation body. Can be formed more uniformly in the circumferential direction.

[0010] Further, by providing the RDF supply device to be installed upward so as to penetrate the bottom of the separation body, the RDF containing the defective molded body can be swirled by the swirling air of air formed in the separation body. Can be uniformly introduced in the circumferential direction, and the deviation can be prevented.

Further, a collector is provided downstream of the air outlet of the separating body for collecting the defective compact discharged together with the air from the outlet. Thereby, the defective molded body can be collected and collected.

Further, the air outlet of the separating body is connected to the RDF.
By connecting to one or both of the waste pit of the manufacturing facility and the upstream position of the compression molding machine, when the recovered defective molded body is used again as RDF raw material, it can be transported without the need for driving power. Can be done.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 (a) and 1 (b) show an embodiment of an RDF drying / sorting apparatus according to the present invention, which has a required length in the vertical direction and has a discharge part 24 for the RDF 14 at the bottom. At the same time, a cylindrical separating body 23 having an outlet 25 for air 26 at the top is installed, and at a lower position of the separating body 23,
The other end of the air supply pipe 27 whose one end is connected to the blower 28 is tangentially connected, and the air 26 pressurized by the blower 28 is sent into the separation body 23 from the tangential direction, so that the separation cylinder A swirling flow of the air 26 toward the outlet 25 from above is formed in the portion 23, and the swirling flow of the air 26 is formed at an upper position of the side wall of the separation body 23, for example, at a height of about 2 m from the bottom. For example, a screw-type supply device 29 is connected, and the RDF 14 in which the defective molded bodies 17 are mixed is supplied from the outlet 30 of the screw-type RDF etc. supply device 29 to the inside of the separation body 23,
The air can be injected into the swirling flow of the air 26 in the separation body 23.

Further, a cyclone-shaped collector 31 is connected to the outlet 25 of the separating body 23 via a discharge pipe 32, and the defective molded body 17 transferred from the outlet 25 to the discharge pipe 32 together with the air 26 is removed. , And are separated from the air 26 and collected.

The collector 31 is connected to the discharge pipe 32 at the top of a cyclone-shaped body 33, and the defective molded body discharge section 34 for discharging the defective molded body 17 to the bottom.
And a lateral air outlet 3 at the top of the side wall.
5, the outlet 2 of the separating body 23 is provided.
The defective molded body 17 discharged together with the air flow from 5 is received in the body 33 of the collector 31 through the discharge pipe 32 so as to be separated from the air 26 and collected. In addition, the RDF discharge part 24 provided in the separation body part 23, the collector 3
Each of the defective molded body discharge sections 34 is configured to discharge the RDF 14 and the defective molded body 17 to the outside in a state where blow-off of the air 26 is prevented.

The air supply pipe 27 is provided with a flow meter 36, a pressure gauge 37, and a supply air thermometer 38 for detecting a supply state of the air 26 to the separation body 23. The discharge pipe 32 is provided with air 2 discharged from the separation body 23.
6 is provided with a moisture meter 39 and a discharge air thermometer 40 for detecting the drying state and the temperature of the air, and the flow rate of the air 26 detected by the flow meter 36 is a predetermined flow rate, that is, RDF1.
4 is gradually lowered, but the RDF defective molded body 17 that has been lightened due to cracking or breaking can be blown up and the surface of the RDF can be cooled so that it can be cooled. The amount of air 26 supplied from the blower 28 is adjusted by a non-controller. The pressure gauge 37 is provided with the air supply pipe 27 and the discharge pipe 3.
2 is detected, or a change in air pressure that occurs when the blower 28 fails or the like is detected. Further, when the RDF 14 is dried in the separation body 23, the amount of moisture in the discharged air 26 changes. Therefore, the RDF 14 is appropriately dried in accordance with the amount of moisture detected by the moisture meter 39. The flow of the air 26 is changed so as to be performed. Reference numeral 41 denotes a hopper of the screw-type supply device 29.

The RDF drying / sorting device of the present invention comprises:
As shown in FIG. 2, similarly to the RDF manufacturing facility shown in FIG. 6, a refuse pit 3 for storing refuse 2 collected by a refuse collection vehicle 1, a primary crusher 5, a secondary crusher 7, and a noncombustible material A sorter 9, a main reactor 11 for kneading with the additives and adjusting the pH of the refuse 2, and a compression molding machine feeder 12.
And a compression molding machine 13 in that order.
The RDF 14 which is disposed at a position downstream of the compression molding machine 13 in the F manufacturing facility and contains the defective molded body 17 molded by the compression molding machine 13 is transferred by the conveyor 15 to the hopper 41 of the screw type feeding device 29. The feeding device 29 feeds the toner into the separating body 23. On the other hand, the air 26 is supplied from the blower 28 to the separation body 23 to form a swirling flow of the air 26 from below toward the upper outlet 25 in the separation body 23. The rising air 26 is brought into contact with the RDF 14 and the defective molded body 17 supplied from the supply device 29 into the separation body 23 so that the RDF 14 is dried and sorted at the same time.

That is, the RDF 14 containing the defective molded body 17 is separated by the screw type feeding device 29 into the separating body 2.
3, the RDF 14 stays in the separation barrel 23 for a required time by being lowered in the swirling flow of the air 26 overcoming the air flow. As a result, the RDF 14 is cooled and dried by the airflow of the air 26 while descending. After that, the RDF 14 that has reached the bottom of the separation trunk 23 is recovered by being discharged from the RDF discharge unit 24. on the other hand,
The defective compact 17 is cracked or broken, and its weight is lighter than that of the RDF 14.
6 is blown off by the swirling flow and blown up to the outlet 25 of the separation body 23, sent to the collector 31 through the discharge pipe 32 by the air 26 exiting from the outlet 25, and separated from the air 26 in the collector 31. As a result, it collects at the bottom of the collector 31 and is discharged from the defective molded body discharge section 34 and collected. In addition, the recovered defective molded body 17 is sent to the waste pit 3 or the compression molding machine supply feeder 12 by the return conveyor 22 in the same manner as in the related art, and is again used for manufacturing the RDF 14.

As described above, the defective compact 17 contained in the RDF 14 molded by the compression molding machine 13 is
Sorted based on the difference in weight with DF14, RDF14
And the defective molded body 17 can be separated and collected, and at the same time, the RDF 14 can be cooled and dried by staying in the airflow of the air 26 for a required time. And the RDF sorter 19 do not need to be installed separately, so that the space required for the installation can be reduced, and the RDF 14 after the drying process can be conventionally separated from the RDF sorter 1.
The conveyor 18 required for transporting to the conveyor 9 can be eliminated, and equipment costs can be reduced.
Furthermore, since the sorting is performed by wind power, the blower 2
Since there is no need to provide an electric part other than the above-mentioned 8, and the number of movable parts can be greatly reduced, it is possible to reduce the electricity cost and the failure rate.

Next, FIG. 3 shows another embodiment of the present invention. In an RDF drying / sorting apparatus having the same structure as that shown in FIGS. A plurality (two in the figure) of air supply pipes 27 are connected tangentially at equal circumferential positions below the portion 23 so as to have the same swirling flow. In addition, Fig. 1 (a) (b)
Are denoted by the same reference numerals.

According to the present embodiment, more air 26 can be blown into the separation body 23 and the swirling flow of the air 26 can be formed more uniformly in the circumferential direction. This can be advantageous when the size of the portion 23 is increased.

FIG. 4 shows still another embodiment of the present invention. In an RDF drying / sorting apparatus having the same configuration as that shown in FIGS. Instead of attaching the supply device 29 to the upper side wall of the separation body 23, the bottom of the separation body 23 is axially penetrated and installed upward, and the outlet 3 serving as the upper end is provided.
Numeral 0 is arranged at an upper position in the separating body 23. At the bottom of the separating body 23, a chute 42 inclined in one direction is provided, and at the lower end of the chute 42, an RDF discharge part 24 is provided.
The F discharge section 24 and the screw-type supply device 29 do not interfere with each other. In addition, the same components as those shown in FIGS. 1A and 1B are denoted by the same reference numerals.

According to the present embodiment, since the outlet 30 of the screw-type supply device 29 is arranged upward on the axis of the separation body 23, the screw-type supply device 29
When the RDF 14 containing the defective molded body 17 is put into the separating body 23, the RDF 14 and the defective molded body 1
7 is uniformly injected in the circumferential direction with respect to the swirling flow of the air 26, so that it is possible to prevent the occurrence of deviation.

FIG. 5 shows still another embodiment of the present invention. In an RDF drying / sorting apparatus having a structure similar to that shown in FIGS. Instead of connecting the other end of the discharge pipe 32 having one end connected to the outlet 25 of the part 23 to the collector 31, the discharge pipe 3
2 is connected to a waste pit 3 in an RDF manufacturing facility having a configuration similar to that shown in FIG.

In addition, the same components as those shown in FIGS. 1A, 1B and 2 are denoted by the same reference numerals.

According to the present embodiment, the defective compact 17 separated and separated from the RDF 14 in the separation barrel 23 is subjected to the flow of the air 26 used for sorting discharged from the outlet 25 of the separation barrel 23. And transported to the garbage pit 3 so that it can be used again as a raw material for manufacturing the RDF 14. At this time, the defective molded body 17 can be transported only by the flow of the sorting air 26. It is possible to eliminate the need for the return conveyor 22 conventionally used for transporting the defective molded body 17, and therefore, the power for driving the return conveyor 22 is not required.

The present invention is not limited to the above embodiment. The collector 31 shown in FIGS. 1A and 1B separates the defective molded body 17 from the air 26. As long as it can be recovered, it may be of a type other than the cyclone type, and a screw type is shown as the supply device 29 of the RDF 14 including the defective molded body 17, but it is not limited to this, and FIG. , Separation trunk 23
Fig. 2 shows a structure in which two air supply pipes 27 are connected.
The number of the air supply pipes 27 to be connected may be three or more according to the size of the separation body 23. In FIG. 5, the other end of the discharge pipe 32 is connected to the dust pit 3. As shown by a two-dot chain line in FIG. 5, the defective molding 17 may be connected to the compression molding machine supply feeder 12 to directly convey the defective molding 17 to one or both of the dust pit 3 and the compression molding machine supply feeder 12. Of course, various changes can be made without departing from the spirit of the present invention.

[0029]

As described above, according to the RDF drying / sorting apparatus of the present invention, a cylindrical shape having an RDF discharge portion at the bottom and an air outlet at the top has a required length in the vertical direction. RDF with an air supply pipe tangentially connected to the lower part of the separating body of
Is installed at the upper position of the separating body, and the RDF and the defective molded body supplied from the supply device are
The air is blown into the separation body from the air supply pipe, and is selected based on the weight difference in the air that is raised, and is configured to be cooled and dried, so that it is molded by the compression molding machine in the RDF manufacturing facility. The RDF and the defective molded body can be sorted out based on the difference in weight, and at the same time, the RDF can be cooled and dried, so that it is necessary to install the dryer and the sorter separately as in the related art. And the space required for installation can be reduced, and the conveyor required for transporting the RDF after the drying process to the sorting machine can be eliminated, thereby reducing equipment costs. Can be
Since the sorting is performed by wind power, electric parts other than the blower can be eliminated, and the number of movable parts can be greatly reduced, thereby reducing the electricity bill and the failure rate. Demonstrate the excellent effect of being able to,
In addition, by configuring a plurality of air supply pipes tangentially connected at the lower position of the separation body so as to have the same swirling flow, more air can be blown into the separation body and air can be blown. The swirling flow can be formed more evenly in the circumferential direction, and the RDF supply device is configured to be installed upward by penetrating the bottom of the separation body, so that the RDF containing the defective molded body can be formed. It can be uniformly injected in the circumferential direction with respect to the swirling flow of air formed in the separation body, can prevent the occurrence of deviation in the separation body, and can also provide an air outlet for the separation body. On the downstream side, a collector for collecting the defective molded body discharged together with the air from the outlet is provided, so that the defective molded body can be collected by the collector. or,
The air outlet of the separating body is connected to one or both of the waste pit of the RDF manufacturing facility and the upstream position of the compression molding machine, so that the recovered defective molded body can be recycled again.
When used as a raw material for DF, the DF can be transported without the need for driving power.

[Brief description of the drawings]

FIG. 1 shows an embodiment of an RDF drying / sorting apparatus according to the present invention, in which (a) is a partially cut-away schematic side view, and (b).
FIG. 3 is a view taken in the direction of arrows AA in FIG.

FIG. 2 is a schematic diagram showing an example of an RDF manufacturing facility using the apparatus of the present invention shown in FIG.

FIG. 3 shows another embodiment of the present invention.
It is a cut-away plan view corresponding to (b).

FIG. 4 is a partially cut-away schematic side view showing still another embodiment of the present invention.

FIG. 5 is a schematic side view showing still another embodiment of the present invention.

FIG. 6 is a diagram schematically illustrating an example of a conventional RDF manufacturing facility.

[Explanation of symbols]

 Reference Signs List 3 Garbage pit 12 Compression molding machine supply feeder 13 Compression molding machine 14 RDF 17 Defective molded body 23 Separator body 25 Outlet 26 Air 27 Air supply pipe 29 Supply device 31 Collector 32 Discharge pipe

Claims (5)

[Claims] 1. A required length in the vertical direction, and a bottom
An RDF supply device in which a DF discharge section is provided and an air supply pipe is tangentially connected to a lower portion of a cylindrical separation body having an air outlet at the top, and a defective molded article is mixed, It is installed at the upper position of the separating body, and the RDF and the defective molded body supplied from the supply device are blown into the separating body from the air supply pipe and lifted based on the weight difference in the air. An RDF drying / sorting device characterized in that it is configured to be sorted and cooled and dried. 2. A plurality of air supply pipes are tangentially connected at a lower position of the separation body so as to have the same swirling flow.
An RDF drying / sorting apparatus as described in the above. 3. The RD according to claim 1, wherein the RDF supply device is installed upward so as to penetrate the bottom of the separation body.
Drying and sorting device for F. 4. The RDF according to claim 1, further comprising a collector downstream of the air outlet of the separation body for collecting the defective molded body discharged together with the air from the outlet. Drying and sorting equipment. 5. The RDF drying / drying apparatus according to claim 1, wherein the air outlet of the separation body is connected to one or both of a waste pit of the RDF manufacturing facility and an upstream position of the compression molding machine.
Sorting device.