JP2592162Y2 - Waste plastic processing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste plastic processing apparatus for feeding hot air to waste plastic for heating and melting.

[0002]

2. Description of the Related Art As a waste plastic processing apparatus, there is a waste plastic processing apparatus for crushing waste plastic and subjecting the crushed waste plastic to heat melting treatment.

In this type of waste plastic processing apparatus, a crusher with a built-in cutter is provided, and the waste plastic is fed after being crushed. A vertical feed screw conveyor is connected to the crusher, and a melter is also provided on the vertical feed screw conveyor. The waste plastic crushed by the crusher is conveyed by a vertical feed screw conveyor and sent to the melting machine.

[0004] The melting machine is provided with a heating and melting section.
In addition, a burner is installed. The crushed waste plastic conveyed into the melter is heated and melted by hot air from a burner, and the molten waste plastic is dropped from the dropper of the melter, stored in a container, and cooled and solidified. .

By the way, in this type of conventional waste plastic processing apparatus, as described above, the respective processing sections for melting and processing the waste plastic are configured separately and independently, so that a large and wide arrangement space is required as a whole. There are drawbacks such as the necessity and easy handling.

In this case, if each of the above-described processing sections is simply miniaturized independently, the heat-melting performance and the transporting performance (processing capacity of waste plastic) themselves are reduced, and a large amount of waste plastic cannot be processed.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to obtain a waste plastic processing apparatus having a simple and small structure while securing waste plastic processing ability such as heating and melting performance. .

[0008]

The waste plastic processing apparatus according to the present invention comprises a box-shaped apparatus body, and supplies hot air to the waste plastic to heat and melt the waste plastic. In the device, provided at the upper front corner of the device body, an input port for charging waste plastic into the device body, provided near the input port and on the rear side of the device body, from the input port A crushing unit for crushing the waste plastic that has been input, and provided near the crushing unit and directly in communication with the crushing unit on the rear side of the apparatus body with respect to the crushing unit, and provided in the crushing unit. A preheating unit that receives and preheats the crushed waste plastic, a melting unit that is provided directly below the preheating unit, and that heats and melts the waste plastic sent from the preheating unit; Department A storage unit that accumulates waste plastic that is melted and falls and cools and solidifies, and a hot air supply unit that is provided close to the melting unit and directly below the input port and supplies hot air to the melting unit. , Is characterized.

[0009]

[0010]

In the waste plastic processing apparatus according to the first aspect,
Waste plastic is introduced into the apparatus body from the inlet and reaches the crushing unit, where it is finely crushed. The waste plastic crushed in the crushing unit is sequentially sent to the melting unit via the preheating unit and deposited. Further, in the melting section, hot air is sent from the hot air feeding section, and the hot air is sent to the waste plastic in the melting section, and the waste plastic is heated and melted. Waste plastic melted in the melting section
It falls and accumulates in the storage part, cools and solidifies.

Here, in this waste plastic processing apparatus, the above-mentioned charging port, crushing section, preheating section, melting section, storage section and hot air supply section are provided adjacent to each other (separate and independent from each other). Since the processing units are not simply arranged), a compact configuration is obtained as a whole, and a large arrangement space is not required and the handling is easy. Further, since each processing section is not simply made smaller independently, the heat melting performance (processing capacity of waste plastic) does not decrease.

Further, since the crushing portion is located on the side of the preheating portion and the melting portion where the temperature is high, the waste plastic softened does not adhere unnecessarily, and the crushing performance of the crushing portion is reduced. Not even.

[0013]

[0014]

[0015]

[0016]

FIG. 1 is a sectional view showing the entire structure of a waste plastic processing apparatus 10 according to the present invention. FIG. 2 is a partially cutaway side view of the waste plastic processing apparatus 10. ing. FIG. 3 is an external view of the waste plastic processing apparatus 10.

The waste plastic processing apparatus 10 has a body 12 in the form of a box as a whole. The body 12 has an input port 14 at the upper front portion thereof and an opening / closing lid 15 attached thereto. Inside the body 12, processing units of a crushing unit 16, a preheating unit 18, a melting unit 20, a storage unit 22, and a hot air supply unit 24 are arranged, and the processing units are adjacent to each other and separated by a partition. ing. Here, FIG.
The left side of the drawing is referred to as a front side of the apparatus, and the right side of the drawing is referred to as a rear side of the apparatus.

The crushing unit 16 is located on the rear side of the charging port 14 and has a cutter 3 comprising a rotary blade 26 and a fixed blade 28.
0 is arranged. The plurality of rotary blades 26 are fixed at regular intervals along the longitudinal direction of a horizontal shaft 32 rotatably supported on the side wall of the crushing unit 16. The axis 32 is the body 12
The rotary blade 26 is driven to rotate by a motor (not shown) disposed therein. On the other hand, the fixed blade 28 is fixed corresponding to the rotary blade 26 so that the rotary blade 26 enters.
Therefore, when the rotary blade 26 is rotated, the rotary blade 2
The waste plastic P is roughly crushed between the fixed blade 6 and the fixed blade 28.

A preheating section 18 is arranged behind the crushing section 16 (cutter 30). The preheating unit 18 is located near the crushing unit 16 and communicates with the preheating unit 18.
The waste plastic P crushed by the above is fed.

An exhaust chamber 34 is provided near the corner on the opposite side of the charging port 14 above the preheating section 18. The exhaust chamber 34 is provided with the crushing unit 16 communicating with the preheating unit 18 and the exhaust hole 3.
6 through which air in the preheating unit 18 can flow. A filter 38 is attached to the exhaust hole 36.

In the exhaust chamber 34, a blower 40 is arranged. The blower 40 includes a pair of fans 42 and 44 that are rotated by a motor (not shown).
Is connected to a feed pipe 48. Thus, the blower 40 is configured to distribute the air from the preheating unit 18 in a predetermined amount (for example, by half) and to independently supply the air.

On the other hand, below the preheating section 18, a melting section 20 is provided.
Is provided. Inside the melting part 20, a funnel-shaped melting furnace 50 whose opening cross section decreases downward is provided. A drop port 52 is formed at the lower end of the melting furnace 50, and a hot air inlet port 54 elongated in the horizontal direction is formed in the furnace wall.
Are formed in large numbers. At the upper end of the hot-air inlet 54, a hot-air inlet cover plate 56 projecting obliquely downward toward the inside of the melting furnace 50 is formed. From melting furnace 50
To prevent them from jumping outside. The melting furnace 5
0 and the side wall 20A of the fusion zone 20, there is a hot air stagnation chamber 5
8 are formed.

Immediately below the melting section 20 (melting furnace 50), a storage section 22 for cooling and solidifying the molten waste plastic P is provided. Inside the accommodating part 22, a container 64 is placed on a receiving plate 62 which is made movable by a hinge 60, and accommodates the waste plastic P flowing down from the falling port 52 of the melting furnace 50. I have. Also,
A sensor 66 is arranged corresponding to the tip of the receiving plate 62, and can detect that the waste plastic P stored in the container 64 has reached a full state.

Further, a hot air supply section 24 is disposed in front of the melting section 20 (hot air stagnation chamber 58) and below the inlet 14. The hot air supply unit 24 includes a substantially cylindrical furnace 68, and the furnace 68 is connected to the hot air stagnation chamber 58 of the melting unit 20. A burner 70 is attached to the outer wall of the furnace 68, and a fuel tank 71 is arranged below the burner 70. The tip of the burner 70 projects into the furnace 68, and the combustion furnace 72 is fixed inside the furnace 68 so as to cover the tip of the burner 70. The combustion furnace 72 is formed in a cylindrical shape, and has a pair of shielding plates 74 and 76 disposed therein. Through holes 78 and 80 and feed holes 82 are formed in these shielding plates 74 and 76 and the bottom wall 72A of the combustion furnace 72, respectively.
This allows the air heated by the burner 70 to pass through the through holes 7.
After passing through the feed holes 82 and 80, the hot air is sent from the furnace 68 to the hot air stagnation chamber 58, and is further fed from the hot air stagnation chamber 58 to the inside of the melting furnace 50 through the hot air inlet 54. ing.

Further, the above-mentioned feed pipe 48 is connected to the furnace 68. Therefore, the blower 4 is installed in the furnace 68.
The configuration is such that the air from the preheating unit 18 is distributed and fed by 0. On the other hand, the above-described feed pipe 46 is spirally wound around the outer periphery of the combustion furnace 72, and
4. For this reason, the air distributed from the preheating unit 18 by the blower 40 is sent to the reheating unit 84, where the air is heated again by the heat from the combustion furnace 72.

A catalytic combustion device 86 is arranged near the upper side of the hot air supply section 24. This catalytic combustion device 86
The above-mentioned reheating unit 84 (feed pipe 46) via the connection pipe 88
, And the air heated in the reheating unit 84 is sent in. As shown in FIG.
Is composed of a pair of ceramic portions 90, 92 and a platinum portion 94 disposed between the ceramic portions 90, 92, and can catalytically burn the air sent through the connection pipe 88. Further, the medium-fuel combustion device 86
Is connected to an exhaust pipe 96, and the exhaust gas after the catalytic combustion can be exhausted to the outside of the apparatus.

Next, the operation of this embodiment will be described. In the waste plastic processing apparatus 10 having the above configuration, the waste plastic P
When the waste plastic P such as styrene foam, polyethylene, polyvinyl chloride, or polypropylene is introduced into the crushing unit 16 through the inlet 14 when the melting process of the cutter 30 is started, the rotary blade 26 of the cutter 30 rotated by the motor is rotated.
These waste plastics P are sandwiched between and the fixed blade 28 to be roughly crushed.

The crushed waste plastic P is supplied to the crushing section 1
It is sent to the preheating section 18 directly communicating with 6 and further falls into the melting furnace 50 of the melting section 20. In the melting furnace 50, a predetermined amount of crushed waste plastic P is deposited.

On the other hand, in the hot air supply section 24, the air is heated by the burner 70 to generate high-temperature hot air (for example, about 280 ° C.). The high-temperature hot air is sent from the furnace 68 to the hot-air stagnant chamber 58 after passing through the through holes 78 and 80 and the feed hole 82, and further sent from the hot-air stagnant chamber 58 to the melting furnace 50 through the hot-air inlet 54. (At this point, the high-temperature hot air is, for example, about 235 ° C.). At the same time, the high-temperature hot air heats the furnace wall of the melting furnace 50 itself. Therefore, the waste plastic P is melted by receiving a direct heating action by high-temperature hot air and an indirect heating action by heat transmitted through the furnace wall of the melting furnace 50. The molten waste plastic P flows from the falling port 52 of the melting furnace 50 to the storage section 22 by its own weight. The molten waste plastic P that has flowed down into the storage section 22 accumulates in the container 64, where it is naturally cooled by air and solidified.

On the other hand, the exhaust gas such as the gas generated from the waste plastic P upon melting, that is, the low-temperature exhaust air in the preheating section 18 passes through the filter 38 of the exhaust hole 36 and exhaust gas 34.
(At this time, the low-temperature exhaust hot air is, for example, about 90 ° C.), is distributed by the exhaust blower 40, and is independently supplied by the feed pipe 46 and the feed pipe 48, respectively.

Of the two divided low-temperature exhaust hot airs,
One of the low-temperature exhaust air supplied by the supply pipe 46 is supplied to the reheating unit 84 spirally wound around the outer periphery of the combustion furnace 72.
In the reheating section 84, the reheated portion is heated again by the heat from the combustion furnace 72 and the high-temperature exhaust hot air (for example, 250 ° C.)
Degree). Next, the high-temperature exhaust hot air in the reheating unit 84 is sent to the medium-fuel combustion device 86 via the connection pipe 88.

In the medium-fuel combustion device 86, the sent high-temperature exhaust hot air is subjected to catalytic combustion. That is, for example, when styrofoam used for a fish box for packing fish is treated as waste plastic P, chlorine, nitrogen oxides, sulfur oxides, and the like are removed by the ceramic parts 90 and 92, and further, Styrene, which is a cause of foul odor and is a toxic component, is combined with oxygen by the platinum portion 94 and decomposed into carbon dioxide and water. In the medium-fuel combustion device 86, the exhaust gas after the catalytic combustion is exhausted from the exhaust pipe 96 to the outside. Since the exhaust gas is carbon dioxide and water as described above, it is harmless and odorless.

On the other hand, of the two divided low-temperature exhaust air streams, the other low-temperature exhaust air stream supplied by the feed pipe 48 is again fed into the furnace 68 as secondary air and heated by the burner 70. The fuel is completely burned together with the high-temperature hot air in the furnace 68 and reused.

Here, in the waste plastic processing apparatus 10, the above-mentioned charging port 14, crushing section 16, preheating section 18,
Since the melting section 20, the accommodating section 22, and the hot-air supply section 24 are provided adjacent to each other, the apparatus has a compact configuration as a whole, does not require a large arrangement space, and can be easily handled. Further, since the processing units are not simply miniaturized independently, the heating and melting performance (processing capacity of the waste plastic P) does not decrease.

In the waste plastic processing apparatus 10,
Since the crushing unit 16 is located on the side of the preheating unit 18 and the melting unit 20 which are in a high temperature state as described above, the rotary blade 26 and the fixed blade 28 of the cutter 30 are not heated. Therefore, the softened waste plastic P is supplied to the rotary blade 26 or the fixed blade 2.
8 without being unnecessarily attached to the crushing portion 16 (cutter 3).
The crushing performance of 0) does not decrease.

Further, in the waste plastic processing apparatus 10, a part of the low-temperature exhaust hot air after melting the waste plastic P is re-heated by the exhaust blower 40 and the feed pipe 46 to the reheating section 84.
And then heated again by the heat of the combustion furnace 72 to produce high-temperature exhaust hot air, so that there is no need to provide a new heating device or the like for catalytic combustion by the catalytic combustion device 86 thereafter. The temperature can be raised by the heat of the (burner 70), the heat efficiency of the combustion furnace 72 (burner 70) can be improved without waste, and the cost is reduced and the apparatus is not enlarged. . Also, a part of the low-temperature exhaust hot air after melting the waste plastic P (feed pipe 4
6 to perform catalytic combustion on the low-temperature exhaust hot air sent to the reheating unit 84, so that the catalytic combustion device 86 is downsized compared to the case where all the low-temperature exhaust hot air after melting the waste plastic P is catalytically combusted. You can also.

Further, another part of the low-temperature exhaust hot air after melting the waste plastic P (the furnace 6
The low-temperature exhaust hot air sent into the furnace 8 has already been heated and heated to some extent, and is sent as secondary air to the high-temperature hot air in the furnace 68 and reused. Complete combustion is promoted with hot hot air (from 70), which increases thermal efficiency and lowers cost.

Further, since the catalytic combustion device 86 is disposed near the furnace 68 (combustion furnace 72) and covered with the inside of the apparatus body, the catalytic combustion device 86 itself removes the heat of the furnace 68. Received and heated. Therefore, the efficiency of catalytic combustion can be improved by using the heat of the furnace 68 (combustion furnace 72) without waste without providing a new heating device or the like,
The cost is reduced and the device is not enlarged. Further, since the catalytic combustion device 86 is covered inside the device body, an operator does not accidentally touch the catalytic combustion device 86 which is in a high temperature state, and safety can be ensured.

[0039]

As described above, the waste plastic processing apparatus according to the present invention has an excellent effect of achieving a simple and compact structure while securing waste plastic processing performance such as heat melting performance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an entire configuration of a waste plastic processing apparatus according to the present invention.

FIG. 2 is a partially cutaway side view of the waste plastic processing apparatus.

FIG. 3 is an external view of a waste plastic processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Waste plastic processing apparatus 14 Input port 16 Crushing part 18 Preheating part 20 Melting part 22 Storage part 24 Hot air supply part 34 Exhaust chamber 40 Blower 50 Melting furnace 68 Fire furnace 70 Burner 72 Combustion furnace 86 Catalytic combustion device P Waste plastic

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B29B 17/00-17/02 B09B 3/00 303 C08J 11/00-11/06

Claims (1)

(57) [Scope of request for utility model registration] 1. A waste plastic processing apparatus comprising a box-shaped apparatus body for feeding hot air to waste plastics to heat and melt the waste plastic, wherein the waste plastic processing apparatus is provided at an upper front corner of the apparatus body. An inlet for introducing the waste plastic into the apparatus body; a crushing unit provided near the input port and on the rear side of the apparatus body for crushing waste plastic introduced from the input port; A preheating unit provided in direct communication with the crushing unit near the unit and on the rear side of the apparatus body with respect to the crushing unit, for receiving and preheating waste plastic crushed by the crushing unit; and the preheating unit. And a melting section for heating and melting the waste plastic fed from the preheating section, and a melting section provided immediately below the melting section for melting in the melting section.
Waste plastic that is dropped and collected is cooled and solidified
A storage portion , provided near the melting portion and directly below the input port,
A hot air supply unit for supplying hot air to the melting unit .