JP2001260133A - Method for heating blade melt treating for plastic waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute a treatment of a plastic waste to be discharged in a large quantity without generating harmful dioxins, a carbonic acid gas or the like with a small energy at a low cost so as to solve problems that there have been difficulties in sorting and thermal conduction and in treating a large volume. SOLUTION: A method for heating blade melt treating for a plastic waste comprises the steps of partly melting the plastic waste at respective positions at free speeds of many heating blades (heating cutting blades) by about 30% of a completely melting energy, compression molding the waste and blocking the waste. The method further comprises the step of making stones heated a an unmelted surface of the block to a rigid fusion bonded gardening block or the like. In this case, a harmful gas is not generated. The waste is dispersed by the heating blade melting machine A having a low facility cost to alleviate a storage, collecting, transporting and treating costs to solve a problem of a final place of disposition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the recycling of plastic waste such as styrofoam and polyvinyl chloride discharged in large quantities from homes and the like.

[0002]

2. Description of the Related Art Conventionally, plastic waste is melted and molded with heated asphalt, adhered with fine stones, and used in small quantities in building materials and pavement materials. (See, for example, Japanese Patent Publication No. 48-5114.) In the pyrolysis treatment, the energy cost and the gas neutralization treatment cost are high, and the value of the produced oil is low. Recycled products that have been heat-melted or solvent-treated have poor quality and require high processing costs. Vinyl chloride sheets, which generate toxic gases such as dioxin when incinerated, were buried and discarded.

[0003]

SUMMARY OF THE INVENTION In order to prevent global warming and protect the natural environment, there is a demand for resource-saving treatment that does not generate dioxin or carbon dioxide from plastic waste.

[0004] Styrofoam, thin polyethylene film, and molded containers of plastic waste discharged in large quantities from homes may have an apparent specific gravity of 0.01 or less, and when melted by heat, have poor heat conduction and are thermally decomposed. Even if packed, there is little volume shrinkage due to elasticity.
It is difficult to process mixed wood chips.

Currently, recycling of some items is being promoted in accordance with the Packaging Container Recycling Law, which is based on the premise that thorough separation and discharge and separate collection are required. Insufficient collection systems, burden of recycling costs, dry distillation costs due to enormous equipment, etc., and the problem of securing final disposal sites are occurring.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a large amount of non-burnable plastic waste, which is discharged in large quantities, can be freely treated with a large number of heated cutting blades having a large heating area while compressing (see Japanese Patent Publication No. 53-33629). It has been discovered that partial heat melting at a high speed is most effective,
And efficiently melt shrink it to form a molded block.

Large-volume styrofoam packaging waste, such as styrofoam, may have an apparent specific gravity of 0.01 or less.
% To reduce transportation costs and facilitate storage.

[0008] Polyvinyl chloride has a peculiar property that it does not adhere to metal even when heated and pressed at 100 to 250 ° C. When thermally decomposed at a high temperature, hydrochloric acid gas is generated. The high-temperature heating section of the blade A moves back and forth while melting and cutting to prevent partial decomposition and pyrolysis and charring. Also, no dioxin is generated because it is not burned.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Each part will be described with reference to the drawings. FIG. 1 is a front view of the hot blade melting machine A of the present invention. The hot blade (heat cutting blade) 1 heats and melts and cuts the plastic waste B at a free speed while compressing the plastic waste B supplied to the hot blade melter A by the compression press 2. The hot blade 1 is composed of a large number and melts the plastic waste B at a free speed by each pressure device / hot blade press 3. The hot blade 1 is pulled up and reciprocally heated, compression-molded by a molding press 4 and discharged. Since the surface of the block is unfused, deep heating is easy and the baked stone is deeply and firmly fused. Also, the blocks are easily fused by heating with a hot plate or the like. The hot blade 1 uses electric heat with a built-in nichrome wire or combustion energy of combustion gas. The compression press 2 compresses the plastic waste and scrapes off the molten resin adhering to the hot blade 1 with the second compression plate. The hot blade press 3 sets each hot blade to a free speed by combining air pressure, hydraulic pressure and a spring. The molding press 4 is retracted by the pressure difference of the unmelted portion of the block surface. The supply press 5 supplies plastic waste.

[0011]

The present invention is configured as described above, and has the following effects.

The plastic waste is partially melted and molded at about 30% of the energy for completely melting it with the hot blade melting machine A, and the unmelted surface becomes a block that is deeply fused to the heated stone.

[0013] Polyvinyl chloride has a property of not fusing to the hot blade. The high temperature portion of the hot blade reciprocates, and heating from the deformation temperature to partial melting does not generate toxic gas due to thermal decomposition, and does not carbonize and burn.

For plastic waste that is difficult to separate, the material and density of the plastic and the stone,
The melting rate of each part is different due to mixing of paper, wood chips, moisture, metal pieces, etc.A large number of hot blades penetrate at free speed, reciprocate over a wide area and make partial melting, heating efficiency is small and volume is small I do.

[0015] Even if the material of the plastic is different, it is partially melted at many places to become a strong material. If the surface of the block is made unmelted, it is easy to release the mold, and irregular blocks are crushed and laid on the road, and when asphalt is sprayed, the baked stone is welded firmly and a paved road is easily formed.

When polyvinyl chloride or polyethylene is mixed and melted in styrofoam, it has an effect of kneading with a large number of hot blades, and has an effect of melting and mixing to make a polystyrene resin into a material having impact resistance.

If there is moisture in the part of the hot-blade melting machine A where the hot blade has reached, melting is difficult due to loss of evaporation heat, and the approach speed is slowed down. Is melted. In accordance with the present invention, plastic waste that is not sufficiently separated does not undergo thermal decomposition, the processing speed is tripled or more, partially melt-compressed efficiently with little energy, stored as fuel and plastic recycled materials, and crushed. When paving stones, water becomes a simple pavement material that penetrates, and becomes an effective resource for gardening materials such as lightweight garden stones. In addition, it will prevent global warming due to toxic gas such as dioxin and carbon dioxide gas by incineration, and solve the problem of landfill sites.

[0018]

[Brief description of the drawings]

FIG. 1 is a schematic front view of a main part of a hot blade melting machine according to the present invention.

FIG. 2 is a schematic side view of the hot blade melting machine of the present invention.

FIG. 3 is a side view of the partial melting block of the present invention.

FIG. 4 is a side view of a block in which stones are fused.

[Explanation of symbols]

 A Hot Blade Melter B Plastic Waste C Partially Fused Block D Stone Fused Block 1 Hot Blade 2 Compression Press 3 Hot Blade Press 4 Molding Press 5 Feed Press 6 Outlet 7 Unfused Surface 8 Stone

Claims (3)

[Claims] 1. A hot-blade melting machine for reciprocally heating plastic waste, which is difficult to separate and has a large volume and poor thermal conductivity, with a large number of hot blades (heating cutting blades) for heating and cutting at a free speed. A) In order to prevent thermal decomposition, partial melting is performed at about 30% of the energy of complete melting, the surface is adjusted to an unmelted state to form a compression molded block, and the block surface is heated to melt between blocks and stones firmly. A hot blade melting method for plastic waste that can be used as a gardening block that can be worn. 2. The plastic waste is partially melted by a number of hot blades (heated cutting blades) for reciprocatingly heating the plastic waste at a free speed, and the unmelted surface is adjusted by adjusting a molding press, and the mold is released without cooling. The structure of the hot-blade melting machine (A), which shortens the processing time by making the process easier and saves energy and converts it into a compression molded block. 3. Hot-blade melting machine for plastic waste (A)
A gardening block in which stones are firmly fused to the unmelted surface of a partially melt-molded block.