JPS5839594B2 - Garbage processing method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the treatment of garbage discharged from ordinary households, and more specifically, the present invention relates to the treatment of garbage discharged from ordinary households, and more specifically, the various steps of stirring and mixing, separation, compression dehydration, oxygen aeration, and sedimentation of garbage discharged from ordinary households. The present invention relates to a method and apparatus for processing.

Most of the garbage discharged from ordinary households is food residue, with grains, vegetables, seafood, etc. accounting for the majority.

Currently, this garbage is transported by car from each household to a garbage treatment plant, where it is incinerated in a general furnace.

However, since these dusts are comprised of 80 to 90% water by weight, the heat of evaporation is taken away during incineration, requiring an enormous amount of heat.

Therefore, a large amount of incineration fuel is required.

Also, since it contains a lot of water, it undergoes chemical changes when heated during incineration, resulting in a foul odor.

These two inventions were devised to overcome these deficiencies.

The following two inventions will be explained based on the drawings.

FIG. 1 is a flowchart illustrating two inventions.

The garbage collected and transported from ordinary households is first collected in the mixing pit 1.
is put into the.

Here, the dust becomes semi-fluid due to the action of water added through the two pipes and the stirring blade 20.

The amount of water added is about 70 to 90%, and the addition of this water has the effect of preventing dust from scattering.

The waste in a semi-liquid state in the mixing pit is sent to a separation tank 3 located at the bottom of the mixing pit.In the separation tank 3, a conveyor 4 with endlessly connected magnetic plates 6 is installed vertically or slightly It is arranged at an angle, and iron pieces in the garbage are removed here.

The removed iron pieces are collected in a metal piece storage box 5.

The garbage from which the iron pieces have been removed flows into the garbage gutter 6.

The waste trough 6 is adapted to supply waste to several upright compression dehydrators 7.

FIG. 2 is an enlarged view of one arbitrary compression dehydrator 7 and the garbage gutter 6, and the cylinder 8 and the garbage gutter 6 are shown along the line A-A' in FIG.

In FIG. 2, the semi-liquid waste stream flows into a cylinder 8 whose bottom is closed by a stainless steel plate 9 which is pushed up from below by hydraulic pressure.

Next, the piston 10 is pushed up from above by hydraulic pressure, first closing the inlet 11 of the garbage trough, and then compressing the garbage in the cylinder.

Since the stainless steel plate 9 has many holes vertically,
Moisture in the dust flows out of the cylinder through the holes.

The pressure when the piston 10 compresses the garbage in the cylinder 8 is about 1 ton/crti, which lowers the moisture content of the garbage by about 1.
It can be reduced to 6%.

- The amount of garbage flow supplied to the cylinder 8 at each time can be maintained at an appropriate level by arbitrarily changing the flow rate of the garbage and the time during which the piston 10 opens the inlet 11 of the garbage gutter 6. .

” When the compression is finished, raise the piston 10 again,
A suitable amount of the dust flow is introduced into the cylinder 8, and the compression is repeated again.

By repeating this process several times, a disk-shaped compressed garbage with a moisture content of about 16% is formed at the bottom of the cylinder 8.

After the final compression is completed, the piston 10 is not raised;
By lowering the lower stainless steel plate 9 and further pushing up the piston 10, solidified dust is discharged from the cylinder.

This solid waste is collected by a conveyor.

Sewage separated from dust by the compression dehydrator is led to a pipe through a hole in a stainless steel plate 9 at the bottom of the cylinder 8, where it is collected and falls into a reaction tank 12.

In the reaction tank 12, oxygen aeration is performed using an activated sludge method.

That is, in FIG. 1, compressed air is sent into the reaction tank by an air pump 13, and oxidation treatment is performed by adding ammonia or urea or the like from a chemical tank 14.

This treatment can be made more effective by the action of the stirring blade 150.

The oxidized urine water is then sent to the sedimentation tank 16.

In the sedimentation tank, clean water and sludge are separated by the action of several inclined plates 17 arranged alternately to prevent the coagulated substances from floating and a nonionic flocculant sent from the chemical tank 18.

Clean water enters water storage tanks 19 arranged next to each other.

On the other hand, the sludge settles in the lower part of the settling tank, and is sent into the pit 1 again by the pressure pump 20, where it is further mixed with the newly added dust, and undergoes agitation mixing, separation, compression dehydration, oxidation, and precipitation. The steps will be repeated.

Some or all of the water stored in the water storage tank can be added back to the mixing pit to help semi-fluidize the new waste.

The waste treatment according to these two inventions first produces solid compressed waste, which has a moisture content of about 16% and a small volume, so it is easy to transport and burn, and an incinerator is used as the apparatus shown in the present invention. There is little resistance to installing it in a different location, and incineration fuel can be significantly saved.

Furthermore, rather than simply incinerating it, it can also be used as a solid fuel by subjecting it to some natural or artificial drying.

Furthermore, since solid compressed dust is less likely to generate water vapor when burned, it produces significantly less bad odor than before.

The sludge at the bottom of the sedimentation tank, which is ultimately produced by this waste treatment, is thrown into the mixing pit again, so it does not cause secondary pollution.

In this process, the processing capacity of the compression dehydrator 7, which is the main part, can be changed arbitrarily by arbitrarily combining the diameter and number of cylinders 8.

As described above, the garbage processing method according to the specified invention has the effect of saving incineration fuel during incineration and producing solid compacted garbage that does not generate bad odor, and the manufacturing apparatus according to other inventions does not generate secondary pollution. , which has the effect of easily changing processing capacity.

[Brief explanation of the drawing]

Fig. 1 is a flowchart for explaining the two inventions, and Fig. 2 shows the main parts for explaining the principle of the compression dehydrator. A cross section along the line is shown. The names of each part are as follows. 1.--.-mixing focus, 2.--.--stirring blade, 3.
・・・・Separation tank, 4・・・・Magnetic conveyor, 5・・・・Metal piece storage box, 6・・・・Garbage gutter, 7・・・・・・・Compression dehydrator , 8...°Cylinder, 9...°Lower stainless steel plate, 10...- Piston, 11...-Inlet, 12 Reaction tank, 13...
--- Air pump, 14 --- Chemical tank, 15
...------ Stirring blade, 16...- Sedimentation tank, 1
7-...- inclined plate, 18...- chemical tank, 19...
・−・・Water tank, 2゜・・・・Pressure pump.

Claims (1)

[Claims] 1. Dust is put into a mixing pit, water is added and stirred to make it semi-fluid, sent to a separation tank, iron pieces are removed by a magnetic conveyor, and fed to a compression dehydrator via a trash gutter. death,
The water is compressed and dehydrated using a piston pressurized by hydraulic pressure in a cylinder, separated into solid compacted waste and sewage, the sewage is aerated with oxygen in a reaction tank, and a flocculant is added in a settling tank to separate sludge and clean water. A waste treatment method characterized by separating the sludge into water and sending the sludge back to the mixing pit. 2 Place a mixing tank equipped with a water addition pipe and stirring blades,
A separation tank equipped with a magnetic conveyor is installed at the bottom.
A garbage gutter is connected to feed the semi-liquid material from the separation tank to the compression dehydrator, and the lower part is closed with a porous stainless steel plate that moves up and down using hydraulic pressure, and the upper part is equipped with a piston that compresses the material in the cylinder using hydraulic pressure. One or several compression dehydrators are installed, a pipe is installed to lead the dehydrated water to a reaction tank, a reaction tank is installed with an air pump and stirring blades, and a number of inclined plates are installed at the bottom of the reaction tank. What is claimed is: 1. A garbage processing device comprising: a sedimentation tank having a sedimentation tank, a water storage tank for storing supernatant liquid from the sedimentation tank on the side thereof, and a pressure pump and a pipe for feeding sludge at the bottom of the sedimentation tank to a mixing pit again.