Garbage disposal system

A garbage disposal system includes a garbage classifier unit, which consists of a cutting mechanism, a separation water trough, squeezers, and a blower separator, and is controlled to separate plastics and mineral from garbage; a garbage furnace controlled to burn garbage being delivered from the garbage classifier unit, a waste gas treatment unit controlled to treat exhaust gas from the garbage furnace, and a sewage treatment unit controlled to treat waste water from the garbage classifier unit and the waste gas treatment unit for a repeat use.

BACKGROUND OF THE INVENTION 
The present invention relates to an economic garbage disposal system for 
disposing of garbage effectively. 
Various methods are known and widely used in garbage disposal. These 
methods include burning, embedding, compost forming, etc. The most 
accepted garbage disposing method is to burn garbage. However, 
conventional garbage furnaces are still not satisfactory in function 
because they do not separate waste plastics and mineral from the garbage 
to be disposed of. According to statistics, family garbage contains about 
15% of waste plastics, about 60% of water, and about 18% of non-flammable 
solid substances such as metals, glass, stones, etc. Burning waster 
plastics will produce toxic gas causing a secondary pollution. 
Furthermore, molten plastic will cover over the garbage causing the 
garbage not to be completely burnt out. Because family garbage contains 
about 60% of water, directly burning the garbage consumes much fuel. 
Therefore, the performance and service life of the garbage furnace are 
badly affected, and the disposal cost is greatly increased. Because family 
garbage contains much non-flammable solid substances, the size of the 
collection of ash left after burning may be as much as 40% the original 
volume of the garbage. 
SUMMARY OF THE INVENTION 
The present invention has been accomplished under the aforesaid 
circumstances. It is therefore one object of the present invention to 
provide a garbage disposal system which separates non-flammable matters 
and plastic materials from the garbage before burning. It is another 
object of the present invention to provide a garbage disposal system which 
is economic and durable in use. It is still another object of the present 
invention to provide a garbage disposal system which provides a high 
performance. 
To achieve the aforesaid objects, there is provided a garbage disposal 
system which is generally comprised of a garbage classifier unit 
controlled to separate plastics and mineral from garbage, which consists 
of a cutting mechanism, a separation water trough, squeezers, and a blower 
separator, a garbage furnace controlled to burn garbage being delivered 
from the garbage classifier unit, a waste gas treatment unit controlled to 
treat exhaust gas from the garbage furnace, and a sewage treatment unit 
controlled to treat waste water from the garbage classifier unit and the 
waste gas treatment unit for a repeat use.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to the annexed drawings in detail and turning now first to FIG. 
1, a garbage disposal system in accordance with the present invention is 
generally comprised of a classifier unit 1, a garbage furnace 2, a waste 
gas treatment unit 3, and a sewage treatment unit 4. 
Referring to FIGS. 2 and 3 and FIG. 1 again, the classifier unit 1 
comprises a cutting mechanism 12 disposed at the bottom outlet of the 
garbage gathering trough 11 thereof. The cutting mechanism 12 comprises 
two sets of cutter blades 121;122 alternatively arranged and turned in the 
reversed directions, and a set of rods 123 alternatively set behind the 
cutter blades 121 and turned in the same direction relative to the cutter 
blades 121. When plastic garbage bags are dumped in the garbage gather 
trough 11, they are cut by the cutter blades 121;122 causing the garbage 
dropped to a separation water trough 13, and at the same time, the empty 
plastic garbage bags are removed by the rods 123 and separately collected 
for further making reclaimed plastics. 
The separation water trough 13, as shown in FIG. 4, comprises a 
sedimentation basin 131 where metals, stones, glasses, and other 
non-flammable things are settled to the bottom of a liquid contained in 
the sedimentation basin and then delivered away from the separation water 
trough 13 by a first conveyer system 132; things of low specific gravity 
are floated on the liquid. There are three parallel impellers 14 disposed 
on the surface of the liquid in the separation water trough 13, having 
each a revolving shaft 141 and a plurality of blades 142 around the 
respective revolving shaft 141. As the impellers 14 are turned, the 
floated garbage is propelled toward the rear side of the separation water 
trough 13 and then carried to squeezers 16 by a second conveyer system 15. 
While the floated garbage is propelled toward the rear side of the 
separation water trough 13, it is softened by the liquid in the separation 
water trough 13. The second conveyer system 15 comprises a meshed 
conveying belt 151 moved to carry the floated garbage out of the 
separation water trough 13, a solid conveying belt 152 moved to carry the 
gathered garbage from the meshed conveying belt 151 to each squeezer 16, 
and a rotary wheels 153 disposed above the solid conveying belt 152 and 
turned in the reversed direction relative to the solid conveying belt 152 
to spread out the garbage being carried so as to control the garbage 
output to either squeezer 16. 
The squeezer 16 comprises a hydraulic buffer mechanism 164 disposed at the 
top, and three rollers, namely, the first roller 161, the second roller 
162, and the third roller 163 respectively disposed below the hydraulic 
buffer mechanism 164. The first and third rollers 161;163 are bilaterally 
disposed at the bottom. The second roller 162 is disposed between the 
hydraulic buffer mechanism 164 and the first and third rollers 161;163. 
The pitch between the first and second rollers 161;162 is longer than that 
between the second and third rollers 162;163 (because the garbage is 
delivered through the pitch between the first and second rollers 161;162 
toward the pitch between the second and third rollers 162;163). When the 
collected garbage is delivered through the squeezer 16, water is squeezed 
away. The hydraulic buffer mechanism 164 protects the squeezer 16 when a 
hard object is crushed between the rollers 161;162;163. 
The output of the squeezers 16 is connected to a blower separator 17. The 
blower separator 17, as shown in FIGS. 6 and 7, comprises a perforated 
cylinder 171 having a plurality of axial bumper ribs 172 spaced on the 
inside, and a blower 173 driven to send currents of air toward the inside 
of the perforated cylinder 171. The holes on the perforated cylinder 171 
are made gradually bigger toward the rear end. The perforated cylinder 171 
is disposed in a sloping position and turned to stir the garbage, 
permitting plastic films and sheets to be blown to a fixed location by the 
blower 173 for further collection. The other garbage separated from the 
blower separator 17 is then delivered by a third conveyer system 18 to a 
garbage furnace 2 for burning. 
Referring to FIG. 1 again, the waste gas treatment unit 3 is mounted on the 
garbage furnace 2 at the top. The garbage furnace 2 has an ash outlet 21 
at the bottom. The collection of garbage ash left after burning is 
collected and delivered to a collecting place. 
The waste gas treatment unit 3 comprises a sprinkling filter 31, a dust 
collector 32 connected to the sprinkling filter 31, and a chimney 33 
connected to the dust collector 32. The sprinkling filter 31 and the dust 
collector 32 are further linked by a waste gas return pipe 3 to the 
garbage furnace 2 for guiding waste gas to the garbage furnace. Because 
the temperature of the waste gas from the sprinkling filter 31 and the 
dust collector 32 is as high as about 200.degree. C. it can be used to 
accelerate the burning of the garbage. 
The classifier unit 1 further comprises a water sprayer device 41 disposed 
above the cutting mechanism 12 and controlled to spray water over the 
garbage being dumped in the gathering trough 11. Waste water from the 
gathering trough 11, the squeezers 16, the separation water trough 13, and 
the sprinkling filter 31 is guided by a waste water pipe 42 to the sewage 
treatment unit 4. The sewage treatment unit 4 has an output port connected 
to a water supply system by a return water pipe 43 for repeated use. The 
garbage furnace 2, the sprinkling filter 31, the dust collector 32, and 
the chimney 33 are of known devices, therefore they are not described 
herein in detail. 
While only one embodiment of the present invention has been shown and 
described, it will be understood that various modifications and changes 
could be made without departing from the spirit and scope of the 
invention. For example, a washing machine 5 may be installed and 
controlled to wash the plastic garbage separated from the blower separator 
17, and a compactor 51 may be installed and controlled to compact the 
plastic garbage being washed through the washing machine 5 for permitting 
the compacted plastic garbages to be collected for making reclaimed 
plastics.