JPS60147496A - Processing of plastic-containing waste into solid fuel and device therefor - Google Patents

Abstract

PURPOSE:To reduce water content of waste, to prevent occurrence of harmful gas caused by combustion, and to process plastic-containing waste into a solid fuel, by feeding the plastic-containing waste and slaked lime or quick lime to a kneading and compressing device. CONSTITUTION:Waste containing a large amount of plastic is fed from the feed opening 2 of the kneading and compressing device 1. Meanwhile, slaked lime or quick lime in an amount corresponding to the content of the plastic is fed from the outlets 3a and 4a of the constant delivery feeders 3 and 4, and they are uniformly kneaded at the feeder part 7. In the operation, the plastic is melted by frictional heat, and the blend is then extruded from the tip of the nozzle part 8 to give the cylindrical solid fuel 31, the modified star-shaped solid fuel 41, etc.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention can appropriately reduce the moisture content of garbage containing a large amount of plastic and prevent the generation of harmful gases due to combustion, thereby turning it into solid fuel. The present invention relates to a method and apparatus for doing so.

[Prior art and its problems]

Garbage that contains a large amount of plastic has a large thermal calorie content, so it is desirable to use it as fuel, but when the garbage is burned, it generates harmful gases such as hydrogen chloride (HCL), so an exhaust gas treatment device is required, and it is generally was disposed of in a landfill unused. Furthermore, when the plastic is melted and compacted using a cross-contact compression device, if the water content of the waste is high, cross-contact occurs, which is a drawback.

[Purpose of the invention]

In order to eliminate the above-mentioned drawbacks, this invention provides a method for turning plastic-containing waste into solid fuel by appropriately reducing the moisture content and preventing the generation of harmful gases associated with combustion (ζ). The purpose is to provide equipment.

[Key points of the invention]

In order to achieve the above-mentioned object, the present invention includes a cross-wire compression device that solidifies garbage together with slaked lime or quicklime, and a predetermined amount of slaked lime or quicklime, which is approximately corresponding to the plastic content of the garbage, in this cross-wire compression device. The aim is to turn waste into solid fuel by installing a fixed quantity supply device.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the method of the present invention, in which garbage containing a large amount of plastic is crushed by a crusher, and then fed in a predetermined amount from a hopper to a cross-wire compression device by a quantitative feeder.
Slaked lime (CB(OI()z) or Danhe. 8 a month kneading unit, 2 constant supply unit!! F above.

supplied in a predetermined amount that approximately corresponds to the plastic content of the plastic. The garbage and slaked lime or quicklime are uniformly mixed and compressed in a mixed line compression device, and the plastic is melted and reduced in volume by the frictional heat caused by the mixed line and compression, and then assimilated and transported as solid fuel.

According to the above embodiment, the chemical reaction between slaked lime or quicklime and moisture in the air (OaO+Hg0-4CB (OH)
! The slaked lime produced in ) absorbs the water content of the waste, so it is possible to appropriately reduce the moisture content of the waste and generate appropriate frictional heat due to crosstalk and compression. The slaked lime absorbs moisture without generating heat, so it is not dangerous. Furthermore, when the solid fuel is burned, a chemical reaction between hydrogen chloride and slaked lime (2HOL+OB (OH) z→(38(!L*+
It is possible to prevent the generation of harmful gases by producing calcium chloride that decomposes only at high temperatures of about 1600° C. or higher.

FIG. 2 shows an embodiment of the apparatus of the present invention, in which the input port 2 of the cross-conductor compression device 1 is connected to the discharge ports 8a, 4a of a quantitative supply device 8.4 for garbage and slaked lime or quicklime.

The fixed amount supply device 8 supplies a predetermined amount of garbage stored in the hopper 5 through a cross-wire compression device IIζ screw conveyor 8b, and the fixed amount feed device 4 stores the waste in the hopper 6 to produce 7 slaked lime 1 saturated lime 4
A predetermined amount approximately corresponding to the plastic content of the waste is supplied to the kneading and compacting device 2 by means of a screw conveyor 4b. The screw conveyor Bb.

For 4b, a rotary feeder or a conveyor can also be used. The kneading and compacting device 1 is composed of a large-diameter cylindrical feeder section 7 having an input port 2, a small-diameter cylindrical nozzle section 8, and a cone section 9 that connects these parts, and waste, slaked lime, or quicklime input through the input port 2. is uniformly kneaded in the feeder section 7 and then compressed in the cone section 9. The plastic is melted and reduced in volume by the frictional heat caused by the crosstalk and compression, which is then assimilated and discharged from the tip of the nozzle part 8 as solid fuel 81141 in the shape of a cylinder as shown in FIG. 8 or an irregular star shape as shown in FIG. . The shape of the solid fuel 31, 41 is intended to improve air permeability during combustion.

Since the plastic content of the waste is generally within the range of 20% to 40% in large-scale waste treatment plants, the ratio of slaked lime or quicklime to the waste may be kept approximately constant; Since the supply devices 8 and 4 are provided for the waste and slaked lime or quicklime, respectively, it is possible to adjust the transfer speed of 8b which requires changing the ratio.

〔Effect of the invention〕

According to the present invention, a solid kneading and compacting device for plastic-containing waste is provided with a metering supply device that supplies a predetermined amount of slaked lime or quicklime together with the waste in a manner approximately corresponding to the plastic content of the waste, thereby converting the waste into solid fuel. As a result, it is possible to appropriately reduce the moisture content of the waste and prevent the generation of harmful gases due to combustion.

[Brief explanation of drawings]

FIG. 1 is a flow explanatory diagram of an embodiment of the method of this invention, and FIG.
The figure is a longitudinal sectional view of an embodiment of the apparatus of the present invention, and FIGS. 8 and 4 are perspective views of solid fuel. 1... Cross-wire compression device, 2... Inlet, 8.4...
Quantitative supply device, 9a, 4a...discharge port, 81.41.
...Solid fuel. □ Figure 1 Figure 2 Figure 3 Figure 4 f

Claims (1)

[Scope of Claims] 1) A method for solidifying waste containing a large amount of plastic into solid fuel using a cross-track compression device, in which slaked lime, quickstone, and ash are mixed together with the waste. 2) In an apparatus for solidifying waste containing a large amount of plastic into solid fuel using a cross-conductor compression apparatus, a fixed quantity supply apparatus is provided for supplying a predetermined amount of the waste and slaked lime or quicklime, and a discharge outlet of this supply apparatus and A device for turning plastic-containing waste into solid fuel, characterized in that it is connected to an input port of the cross-conductor compression device.