JP3689288B2 - Solid waste treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste solidification processing apparatus in which combustible waste such as dust is dehydrated and then solidified to be used as fuel.
[0002]
[Prior art]
Conventionally, what is shown in FIG. 4 is known as said waste solidification processing apparatus.
[0003]
In this apparatus, a moisture absorbent supply device S ′ is disposed above a conveyor C ′ that transports the waste W ′, and moisture such as slaked lime ejected from the spray nozzle 014 of the moisture absorbent supply device S ′. The absorbent is sprayed on the waste W ′ on the conveyor C ′, transported while removing moisture from the absorbent, put into the molding machine M ′, and the dried and solidified waste W ′ is formed into pellets. And reused as fuel.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional solidification processing device of waste, since the moisture absorbent such as slaked lime is sprayed on the waste on the conveyor from above,
a. The moisture absorbent adheres to accessory devices such as the conveyor main body and the guide member of the conveyor, making cleaning difficult.
[0005]
b. On the waste that is placed in a lump on the conveyor, the moisture absorbent adheres only to the surface (no moisture absorbent adheres to the side in contact with the conveyor), and the waste Moisture inside is left without being sufficiently absorbed, and the solidified waste is spoiled while being stored for reuse as fuel after being solidified by a molding machine.
[0006]
There is a problem.
[0007]
The present invention has been made in view of such circumstances, and in the middle of the waste falling from the conveyor to the molding machine, the moisture absorbent is sprayed on the waste substantially perpendicularly to the flow direction of the waste. It is an object of the present invention to provide a novel waste solidification processing apparatus that can reliably remove the moisture of the waste with the moisture absorbent without causing the conveyor to become dirty. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, while transporting waste such as dust from the transport conveyor to the molding machine, the water absorbent is applied to the waste from the spray nozzle of the water absorbent supply device. In the solidification processing equipment for waste,
The waste is dropped into the molding machine (M) from a carry-out portion of the conveyor through a dropping passage, the spray nozzle is provided in the middle of the dropping passage , In the passage, it is characterized by being opened substantially orthogonal to the dropping passage, and according to such a feature, the moisture absorbent is sprayed substantially orthogonal to the flow direction of waste, The transport conveyor is not fouled by the moisture absorbent, and the waste after the solidification treatment by reliably absorbing and removing moisture in the waste does not rot during storage. Even after long-term storage, it can be reused as fuel.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.
[0010]
FIG. 1 is an overall side view of a solidification treatment apparatus for waste according to the present invention, FIG. 2 is an enlarged cross-sectional view of a virtual line encircled portion taken along line 2 in FIG. 1, and FIG. 3 is a line 3-3 in FIG. FIG.
[0011]
In FIG. 1, an endless conveyor main body 1 is suspended between a drive unit 2 and a guide unit 3 in a transport conveyor C for waste W supported by a gantry (not shown), and the direction indicated by the arrow in FIG. The entire length from the carry-in part 1i to the carry-out part 1o is covered with a hermetic conveyor cover 4. An entrance 5 for the waste W is opened at the base end of the conveyor cover 4 above the carry-in portion 1i of the transport conveyor C, and flammable materials such as dust separated from the carry-in port 5 by a cyclone (not shown). The waste W is dropped onto the carry-in part 1i of the conveyor C. In addition, an outlet 6 for the waste W is opened at the front end of the conveyor cover 4 below the unloading section 1o of the conveyor C, and the inlet 8i of the discharge passage 8 for the waste W is communicated with the outlet 6. The unloading section 1o of the conveyor C faces the entrance 8i. The waste W dropping passage 8 extends in the vertical direction, and an outlet 8o at the lower end thereof communicates with a hopper 18 of a molding machine M to be described later, which solidifies and molds the waste W into a pellet. The waste W transported by the transport conveyor C is dropped into the dropping passage 8 from the carrying-out portion 1o. At that time, the lump-like waste W is thrown out into the air and broken up into pieces in the dropping passage 8. To fall.
[0012]
In the middle of the dropping passage 8, a moisture absorbent supply machine, that is, slaked lime supply machine S is arranged. The slaked lime feeder S includes a slaked lime tank 10, a compressor 12 communicated with a stirring chamber 11 formed in a lower portion of a porous bottom plate 10 a in the tank 10, and a pump 13 communicated with an outlet of the stirring chamber 11. , A motor 15 for driving the pump 13 and a spray nozzle 14 connected to the discharge port of the pump 13. The spray nozzle 14 is provided in the middle of the dropping passage 8, The outlet is opened in the dropping passage 8 substantially perpendicular to the passage 8. In the stirring chamber 11, dry air from the compressor 12 and slaked lime falling from the slaked lime tank 10 through the porous bottom plate 10 a are mixed to fluidize the slaked lime, and the fluidized slaked lime is driven by the pump 13. From the spray nozzle 14, it is ejected into the dropping passage 8.
[0013]
Incidentally, the diffusing nozzle 14 provided in the middle of dropping communication path 8 may be a plurality in a single, in the case of multiple, provided at intervals in the circumferential direction of the dropping passages 8. In this case, it may be shifted in the vertical direction of the dropping passage 8.
[0014]
Slaked lime has a function of chemically reacting with moisture in the waste W and promoting evaporation of the moisture, and is widely used as a moisture absorbent for the waste W.
[0015]
By the way, the combustible waste W conveyed on the conveyor C as a lump is dropped into the dropping passage 8 from the carry-out portion 1o, and flows down in the dropping passage 8 due to gravity. At this time, the lump-like waste W is broken into pieces and dispersed, and passes through the dropping passage 8.
[0016]
On the other hand, the slaked lime mixed with dry air becomes a fluid and is ejected from the spray nozzle 14 into the dropping passage 8 substantially perpendicular to the flow direction of the waste W, and falls in the dropping passage 8. It is sprayed on and adheres to it. In this case, since the waste W is broken apart as described above, slaked lime is uniformly attached to the entire periphery of the waste W, and further enters the inside of the waste W. The contained moisture can be efficiently evaporated and absorbed.
[0017]
Moreover, since the slaked lime ejected from the spray nozzle 14 does not adhere to the conveyance conveyor C and its accessory devices, it is not difficult to clean them.
[0018]
At the outlet 8o at the lower end of the dropping passage 8 extending in the vertical direction, a molding machine M for solidifying and molding the waste W from which moisture has been removed into a pellet form is disposed. As shown in FIGS. 2 and 3, the molding machine M includes a molding machine main body 16 and a motor 17 that drives the molding machine 16. The molding machine main body 16 has an inlet at an outlet 8 o of the dropping passage 8. A hopper 18 communicated with the hopper 18 is provided to receive the waste W falling in the dropping passage 8. The molding machine body 16 includes a drive shaft 19 driven by the motor 17, a die 20 rotatable around a rotation axis that is offset from the drive shaft 19, and a holding means 21 that rotatably holds the die 20. A pressing roller 22 is provided that is fixed to the other end of the drive shaft 19 and abuts against the inner surface of the die 20, and the molding machine main body 16 is fixed on a gantry 33.
[0019]
Inner teeth 23 are engraved on the inner surface of the die 20, and a plurality of die holes 24 are formed in the valleys of the inner teeth 23 between the inner surface and the outer surface of the die 20, and these die holes. 24 gradually decreases in diameter along the radial direction of the die 20. The holding means 21 includes three circumscribed rollers 25 arranged circumferentially so as to circumscribe the die 20, and each circumscribed roller 25 rotates on a shaft 26 supported by the molding machine body 16. It is supported freely. Each circumscribed roller 25 holds the die 20 while rotating around each axis 26 according to the rotation of the die 20. The pressing roller 22 is fixed to the other end of the drive shaft 19 in the die 20, and external teeth 28 that mesh with the inner surface of the die 20 are engraved on the pressing roller 22. Therefore, the die 20 is rotated by the pressing roller 22 that rotates integrally with the drive shaft 19. In the die 20, a cutter 29 is fixed to the molding machine main body 16, and the cutting edge of the cutter 29 is disposed at a position spaced apart from the outer surface of the die 20.
[0020]
Further, a cover 30 is fixed to the molding machine main body 16, and a chute 31 communicating with the hopper 18 is provided at an upper part of the cover 30, and this chute 31 faces the inside of the die 20, and a lower part of the cover 30. Is provided with a discharge port 32.
[0021]
The combustible waste W such as dust that has fallen through the dropping passage 8 and has been dehydrated by adhering slaked lime from the ejection nozzle 14 is supplied into the hopper 18. On the other hand, in the molding machine M, the pressure roller 22 is rotated by the rotation of the drive shaft 19 driven by the motor 17, and the die 20 is further rotated. The waste W is caught between the pressing roller 22 and the die 20 and is pushed into the die hole 24 from the valley of the inner teeth 23 of the die 20. The pushing of the waste W into the die hole 24 is sequentially performed every time the die 20 rotates once, and the waste W moves outward in the die hole 24 along the radial direction of the die 20. , Extruded from the outer surface of the die 20. At this time, the portion protruding from the outer surface of the die 20 is sequentially cut by the cutter 29 according to the rotation of the die 20 and solidified into a pellet.
[0022]
Since the waste W solidified and formed into pellets has been sufficiently dehydrated by slaked lime as described above, there is no fear of decay during storage. Even after storage, it can be effectively reused as fuel.
[0023]
As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.
[0024]
For example, in the above embodiment, slaked lime is used as the moisture absorbent, but it goes without saying that other known moisture absorbents may be used instead. Instead, other conventionally known molding machines may be used.
[0025]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the waste solidifying apparatus, the waste is dropped from the carry-out portion of the conveyor to the molding machine through the drop passage, and the drop In the passage, the spray nozzle is arranged substantially orthogonal to the flow direction of the waste flowing therethrough, so that the conveyor is not fouled by the moisture absorbent, and its cleaning is not difficult. The water contained in the waste is reliably absorbed and removed, and the solid-molded waste can be reused as fuel over a long period of time without being spoiled during storage.
[Brief description of the drawings]
1 is an overall side view of a waste solidification processing apparatus. FIG. 2 is an enlarged cross-sectional view of a portion surrounded by an imaginary line indicated by arrow 2 in FIG. 1. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 4] Overall side view of a conventional waste solidification processing apparatus [Explanation of symbols]
1o ······························································································ Machine (slaked lime feeder)
W ... Waste

Claims (1)

While transporting the waste (W) such as dust from the conveyor (C) to the molding machine (M), the water absorbent from the spray nozzle (14) of the water absorbent supply machine (S) is transferred to the waste (W). In the solidification processing equipment for waste,
The waste is dropped into the molding machine (M) from the unloading part (1o) of the conveyor (C) through the dropping passage (8), and the spray nozzle (14) is connected to the dropping passage (8). ), And the outlet thereof is opened in the dropping passage (8) substantially orthogonally to the dropping passage (8). .

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