KR102472926B1 - Food waste disposal device - Google Patents

Abstract

The present invention relates to a food waste disposal device. More particularly, the present invention relates to a food waste disposal device which uses pellets for heating to facilitate drying and fermentation of introduced food waste, uses a helical or spiral blade to increase stirring efficiency, and removes moisture and odor of gas discharged from the food waste through a cooler and reheating. The food waste disposal device of the present invention comprises: a stirring tank; a rotating shaft rotating at the center of the stirring tank; a blade coupled so as to be perpendicular to the rotating shaft while causing agitation inside the stirring tank; a heat exchanger communicating with an upper part of the stirring tank to cool the gas discharged from the upper part of the stirring tank; and a combustion chamber formed on a lower part of the stirring tank to communicate with the heat exchanger, and heating the stirring tank by burning gas cooled in the heat exchanger and pellets supplied from the outside.

Description

Food waste disposal device {Food waste disposal device}

The present invention relates to a food waste treatment apparatus, and more particularly, to heat food waste using pellets to facilitate drying and fermentation of food waste, increase stirring efficiency by using a helical or spiral blade, and provide a cooler and reheating system. The present invention relates to a food waste treatment device in which moisture and odor of gas discharged from food waste are removed through the process.

According to the statistics of 'National Waste Generation and Treatment Status' issued by the Ministry of Environment, about 5 million tons of food waste was generated in 2019 alone.

Converted to a daily average, it is about 14,314 tons, accounting for 24.7% of the total household waste.

Since Korean food waste contains a large amount of water, about 80% of it is treated as wastewater after being brought into a resource recovery facility.

In addition, food waste in Korea is difficult to treat because it contains salt, and emits a large amount of carbon dioxide.

Only a small portion of such food waste is recycled as livestock feed and compost, and the rest is disposed of in a landfill or the like.

As a result, an annual cost of 800 billion won is being input only for the disposal of food waste such as landfill and incineration.

Currently used food waste disposal apparatuses simply do not completely remove moisture and odor from food waste and exhaust gas by simply dehydrating and drying.

In addition, in order to remove moisture and odor, expensive devices are added or a removal step is added, but questions are raised about the efficiency.

Accordingly, there is a need for a food waste disposal apparatus that is simple in processing food waste and highly efficient at a low cost.

(Patent Document 1) KR 10-1366338 B1

(Patent Document 2) KR 10-1448503 B1

The present invention was invented to solve the above problems, and low-cost and high-efficiency heating is possible using inexpensive pellets, the blade is configured in a helical or spiral shape to enable efficient stirring, and a removal table is further provided to prevent blade deposition. To provide a food waste treatment device that can be easily stirred by removing water, removes moisture from gas generated from food waste using a cooler, and removes odor by heating the dehydrated gas in a combustion chamber. There is a purpose.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood from the description below.

In the food waste treatment apparatus according to the present invention for achieving the above object, in the food waste treatment apparatus, the stirring tank; a rotating shaft rotating at the center of the stirring bath; Doedoe coupled so as to be perpendicular to the rotating shaft, the blade causing agitation inside the stirring tank; a heat exchanger communicating with the top of the stirring tank to cool the gas discharged from the top of the stirring tank; and a combustion chamber formed under the stirring tank to communicate with the heat exchanger and heating the stirring tank by combustion of gas cooled in the heat exchanger and pellets supplied from the outside. It is a technical feature that consists of.

In addition, the blade may include: a first horizontal portion having one end coupled to the upper side of the rotation shaft; a second horizontal portion having one end coupled to the lower side of the rotation shaft; And doedoe connected to each other end of the first horizontal portion and the second horizontal portion, it is composed of a connection portion configured in a helical form is characterized by a technical feature.

In addition, the technical feature is that the other ends of the first horizontal part and the second horizontal part are not on the same vertical line.

In addition, the plurality of blades are provided inside the stirring tank, and are characterized in that they are provided to be symmetrical to each other with respect to the rotating shaft.

In addition, it is characterized by a technical feature that a removal table is further provided horizontally disposed inside the stirring tank so that contents deposited on the first horizontal portion and the second horizontal portion are removed by contact.

The present invention according to the above configuration can expect the following effects.

Using inexpensive pellets, it becomes possible to dry food waste at a lower cost than conventional heating methods.

In addition, a heating method using pellets is used, but a device for automatically supplying pellets is further provided, making it possible to easily maintain a constant temperature.

The blade used in the present invention is configured in a helical or spiral shape, so that food waste can be stirred relatively more efficiently than in the prior art.

In addition, it is possible to efficiently stir the whole without generating food waste deposited through the blades connected to the bottom.

In the prior art, when processing food waste, an odor was generated or an additional device was required to remove the odor, but the present invention removes the odor by using a combustion chamber for fermenting and drying food waste to heat exhaust gas, It becomes possible to remove the odor of the exhaust gas without the device.

In addition, a cooler is further provided, so that moisture in the gas discharged from the food waste can be removed.

In the prior art, damage and deformation of the blades frequently occurred due to food waste deposited on the blades, but the present invention further provided a removal table to remove food waste deposited on the blades, thereby preventing problems occurring in the blades in advance. Therefore, it is possible to reduce cost and time by reducing repair and replacement time of the device.

1 is a block diagram of a food waste disposal apparatus according to a preferred embodiment of the present invention.
2 is a detailed view of a food waste disposal apparatus according to a preferred embodiment of the present invention.
3 is a schematic diagram showing the shape of a blade of a food waste disposal apparatus according to a preferred embodiment of the present invention.
4 is a schematic diagram showing the location of the removal table of the food waste disposal apparatus according to a preferred embodiment of the present invention.

Hereinafter, a food waste disposal apparatus according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram of a food waste treatment device according to a preferred embodiment of the present invention, FIG. 2 is a detailed view of a food waste treatment device according to a preferred embodiment of the present invention, and FIG. 3 is a preferred embodiment of the present invention 4 is a schematic diagram showing the shape of a blade of a food waste disposal apparatus according to the present invention, and FIG.

As shown in FIG. 1 , the food waste disposal apparatus according to a preferred embodiment of the present invention may include a stirring tank 100, a rotating shaft 200, blades 300, a cooler 400, and a combustion chamber 500.

First, look at the stirring tank 100.

The stirring tank 100 serves as a place where food waste is put and stirred, but it may be possible to dry the food waste.

In detail, food waste put into the stirring tank 100 may be agitated by a blade 300 to be described later and heated by a combustion chamber 500 to be described later, thereby drying the food waste.

The stirring tank 100 may include a stirring container 110, an inlet 120, a blower 130, an outlet 140, and a removal table 150.

The stirring tub 110 forms the outer shape of the stirring tub 100, but may be configured in a hollow cylindrical shape in which food waste can be stored.

In addition, it may be possible that the lower part of the agitating cylinder 110 is configured in a cone structure that narrows in the direction of the ground.

The inlet 120 is positioned at one end of the upper surface of the agitation bin 110 and is configured in a funnel shape so that food waste can be easily introduced into the agitation bin 110 .

The blower 130 may be positioned on the side of the agitating barrel 110 and configured at the top so that gas is discharged smoothly.

The blower 130 is configured to suck gas using a propeller, so that gas generated in the stirring tank 100 can be easily discharged to a cooler 400 to be described later.

The discharge port 140 is located on one side of the lower part of the agitator 110, and may be configured at the lowermost end so that processed food waste can be easily discharged.

The outlet 140 is configured to be closed while the food waste is being processed and opened when the processing is completed, and both automatic and manual opening/closing methods may be used.

In addition, a discharge screw 141 may be extended to the discharge port 140 so that the discharged food waste may be moved to a desired location.

Accordingly, it may be possible to easily discharge the processed food waste to the outside.

A plurality of removal tables 150 are provided inside the agitating bucket 110 and may serve to remove food waste deposited on the blade 300 to be described later.

In detail, the removal table 150 is configured in the form of a pipe that is horizontal to the ground, but is slanted to one side from the center of the stirring container 110 so that problems such as interference and friction with the rotating shaft 200 to be described later do not occur. It is configured so that the upper surface of the blade 300 to be described later and the removal table 150 are in contact with each other so that food waste deposited on the upper surface of the blade 300 to be described later can be removed.

In addition, it may be possible to prevent food waste from being deposited on the blade 300 to be described later, thereby preventing the blade 300 from being corroded, deformed, and damaged.

Components of the above-described stirring bath 100 may preferably be made of materials having strong heat resistance so as to withstand high temperatures.

In addition, it may be preferable to use a material resistant to corrosion as a part that directly contacts high-salinity food waste.

Next, look at the rotating shaft 200.

The rotating shaft 200 is coupled to the center of the stirring tank 100 in a direction perpendicular to the ground, and is configured in the form of a relatively longer circular pipe than the stirring tank 100, and both ends are connected to a rotation motor 230 to be described later It may be possible to be coupled and rotated.

A space is formed inside the rotating shaft 200 and may serve as a flue for gas discharged to the outside.

A suction hole 210, a gas exhaust port 220, and a rotation motor 230 may be further configured on the rotation shaft 200.

The suction hole 210 is formed with a plurality of holes open to the rotating shaft protruding from the lower part of the stirring tank 100, and is located inside the combustion chamber 500 to be described later, and may serve to suck heated gas.

In detail, it may be possible that the gas generated in the stirring tank 100 passes through a cooler 400 to be described later, is heated in a combustion chamber 500 to be described later, and is sucked into the suction hole 210 of the rotating shaft 200. .

The suction hole 210 is generally composed of an open hole, but a mesh may be further configured so that foreign substances other than gas are not sucked.

In addition, by further configuring a trap inside the rotating shaft 200, it may be possible to prevent the inhaled gas from being discharged in reverse through the suction hole 210.

The gas exhaust port 220 is located at one end of the upper portion of the rotating shaft 200 and may serve to discharge gas passing through the inside of the rotating shaft 200 to the outside.

In detail, it may be possible for the gas sucked into the rotating shaft 200 from the suction hole 210 to be discharged to the outside through the gas exhaust port 220, one end of which is open, communicating with the upper part of the rotating shaft 200.

A nitrogen oxide catalytic device (not shown) may be further provided inside the gas exhaust port 220 , and it may be possible to additionally remove the odor of the gas discharged through the gas exhaust port 220 .

In addition, a hood cap may be further provided at an end of the gas exhaust port 220 to block inflow of foreign substances such as rain, dust, and insects, thereby stabilizing the exhaust.

The rotating shaft 200 according to the above-described configuration is a part in which direct rotation is operated in the stirring tank 100, and it is preferable to use a material that has strong resistance to heat and is resistant to deformation and damage due to rotational force. can

In addition, since food waste contains a large amount of salt, it may be possible to increase corrosion resistance to salt by using a material resistant to corrosion and forming a passivation film on the surface through polishing.

A plurality of rotary motors 230 are provided above and below the rotary shaft 200 and may serve to rotate the rotary shaft 200 .

The rotary motor 230 is composed of a rigid coupling such as a gear coupling with the rotary shaft 200, and it may be possible that a slip phenomenon does not occur.

In addition, the rotational motor 230 may be able to change the capacity of the motor according to the output required for rotation.

Next, look at the blade 300.

The blade 300 is configured to be coupled to the rotary shaft 200 inside the stirring tank 100, and may serve to agitate food waste.

In addition, a plurality of blades 300 may be provided vertically to increase food waste agitation efficiency, and may be configured in a symmetrical structure facing each other with respect to the rotating shaft 200.

The blade 300 may include a first horizontal portion 310 , a second horizontal portion 320 and a connecting portion 330 .

The first horizontal part 310 is configured horizontally on the upper part of the blade, and one end may be coupled to the rotational shaft 200 .

The second horizontal part 320 is configured horizontally at the lower part of the blade, and one end is coupled to the rotating shaft 200, and it may be possible to be coupled to one end biased on the same vertical line as the first horizontal part 310.

The first horizontal portion 310 and the second horizontal portion 320 are basically configured in a straight line shape, but may be configured in a curved shape if necessary.

The connection part 330 connects each free end of the first horizontal part 310 and the second horizontal part 320 that are not coupled to the rotating shaft 200, and is configured in a helical or spiral shape to facilitate stirring. It could be possible.

In detail, one end of the connection part 330 is made of a hook-shaped surface bent in the rotational direction, and food waste rises in the rotational direction along the curved surface of the connection part 330 by the rotation of the blade 300 when the food waste is stirred. it may be possible to become

Accordingly, the food waste may be easily moved from the outside to the center of the mixing tank 100 so that the food waste is efficiently stirred.

A stirring blade 340 may be further provided at the lower end of the rotating shaft 200 .

The stirring blade 340 serves to stir food waste under the stirring tank 100, but may have a shape different from that of the blade 300 in consideration of the shape of the lower part of the stirring tank 100.

Accordingly, the stirring blade 340 is provided in a right-angled triangle shape, and is generally configured in a linear shape, but may be configured in a helical or spiral shape like the blade 300.

Through the above-described components, it may be possible to evenly stir the food waste put into the stirring tank 100 from the top to the bottom without depositing.

In addition, it may be desirable to use a material resistant to breakage and deformation as the above-described components directly contact with food waste and generate loads.

In addition, it may be preferable to use a material resistant to corrosion in order to prevent corrosion due to salt in food waste, but to increase corrosion resistance by forming a film through a polishing operation.

Next, look at the heat exchanger 400.

The heat exchanger 400 is positioned outside the stirring tank 100 and may serve to cool the high-temperature gas.

In detail, the high-temperature gas generated in the stirring tank 100 may be discharged to the blowing pipe 410 through the blower 130 and cooled while passing through the heat exchanger 400 so that moisture may be removed. .

The heat exchanger 400 may be connected to the blowing pipe 410 so that high-temperature gas is sucked in and cooled gas is discharged to a combustion chamber 500 to be described later.

Accordingly, the heat exchanger 400 may be further provided with a communication pipe 430 connected to the combustion chamber 500 to be described later.

The heat exchanger 400 may remove moisture from gas discharged from food waste, and thus, it may be possible to primarily remove odors generated in the process of treating food waste.

The capacity of the heat exchanger 400 may be increased or a plurality of heat exchangers 400 may be used to increase food waste treatment capacity and efficiency.

In addition, several types of cooling methods can be used for the heat exchanger 400, but it is preferable to use a shell-and-tube method that has high heat transfer power, long lifespan because it is made of steel, and high heat exchange efficiency by using turbulent flow. can

An oxygen supply device 420 may be separately provided outside the heat exchanger 400, so that combustion efficiency in the combustion chamber 500 to be described later may be increased.

In detail, the cooled gas discharged from the heat exchanger 400 is discharged to the combustion chamber 500 to be described later, and the cooled gas can lower the combustion efficiency of the combustion chamber 500 to be described later, so the oxygen supply device 420 It may be possible to increase the combustion efficiency of the pellets in the combustion chamber 500 to be described later by mixing with oxygen generated in the.

As the oxygen supply device 420, it may be preferable to use a device using a pressure swing adsorption (PSA) method using air in the atmosphere.

Next, look at the combustion chamber 500.

The combustion chamber 500 is positioned outside the lower part of the stirring tank 100 and may serve to dry and ferment stored food waste by heating the stirring tank 100 using pellets.

The combustion chamber 500 may be heated and maintained at a temperature of 700 to 800 degrees using pellets for drying and fermentation of food waste.

In addition, by heating the cooled gas discharged from the heat exchanger 400 to a temperature of 700 to 800 degrees in the combustion chamber 500, it may be possible to completely burn the odor contained in the gas.

The combustion chamber 500 may be configured in a form surrounding the lower part of the stirring tank 100, but configured in a closed structure so that heat is not lost to the outside.

In addition, the combustion chamber 500 is generally configured in a cylindrical shape, but it may be possible to change the shape depending on the installation place and environment.

In addition, the combustion chamber 500 uses a material that retains heat and has an excellent heat preservation ability, but all materials such as bricks and steel may be used.

In order to efficiently heat the stirring tank 100, the combustion chamber 500 may be supplied with pellets using a pellet storage 510 and a pellet supply screw 520 provided separately outside the combustion chamber 500. .

The pellet storage 510 is a device for storing pellets used in the combustion chamber 500, and it may be possible to automatically supply necessary pellets to the combustion chamber according to the temperature of the stirring bath 100.

The pellet supply screw 520 may be able to move the pellets discharged from the pellet storage 510 to a desired position.

Accordingly, it is possible to automatically maintain the temperature of the stirring bath 100 and reduce the time and manpower required.

Based on the above configuration, the operating state of the present invention will be examined.

Food waste can be introduced through the inlet 120 and stored in the stirring tank 100 .

In order to heat the stirring bath 100, it is possible to automatically supply pellets to the combustion chamber 500 from the pellet storage 510 and the pellet supply screw 520.

In the combustion chamber 500, the stirring tank 100 is heated using pellets to raise the temperature to a set value, and the rotating shaft 200 can be rotated by the rotating motor 230.

When the rotating shaft 200 is rotated, the blade 300 coupled to the rotating shaft 200 can agitate the food waste inside the mixing tank 100 .

By applying a helical or spiral shape to the blades 300 and agitating blades 340 coupled to the top, middle, and bottom of the rotating shaft 200, the agitation efficiency of food waste is increased, and food waste is deposited inside the agitation tank 100. What doesn't happen becomes possible.

In addition, a removal table 150 is provided inside the stirring tank 100 so that food waste is not deposited on the blade 300, so that food waste is not deposited on the upper surface of the rotating blade 300. .

When food waste is stirred, gas is generated, and the generated gas rises, is discharged from the inside of the stirring tank 100 to the blowing pipe 410 through the blower 130, and is sucked into the heat exchanger 400. do.

The gas sucked into the heat exchanger 400 is cooled to remove moisture, and it is possible to first remove odor.

The gas from which moisture and odor are primarily removed is mixed with oxygen generated in the oxygen supply device 420 and introduced into the combustion chamber 500 through the communication pipe 430.

The mixed gas introduced into the combustion chamber 500 can increase the combustion efficiency of the combustion chamber 500 due to the influence of oxygen.

In addition, the introduced mixed gas is heated at 700 to 800 degrees in the combustion chamber 500 to allow complete combustion in which odor is secondarily removed.

Secondarily, the gas from which the odor is removed is introduced into the suction hole 210 formed in the rotating shaft 200, and is allowed to rise through the passage formed in the center of the rotating shaft 200.

The elevated gas is discharged to the outside through the gas exhaust port 220, and the odor can be removed tertiarily by a nitrogen oxide catalytic device (not shown) provided in the gas exhaust port 220.

Accordingly, in the present invention, it is possible to remove and discharge odors from gas generated during food waste treatment.

During stirring, when the temperature of the stirring tank 100 is lowered, it is possible to automatically supply pellets from the pellet storage 510 and the pellet supply screw 520 to the combustion chamber 500 to maintain the set temperature.

When the stirring is completed, it is possible to ferment and dry the food waste inside the stirring tank 100 .

The fermented and dried food waste is discharged through the discharge port 140 provided at the bottom of the stirring tank 100, and can be moved to a desired location through the discharge screw 141.

The above embodiment is merely an example, and other embodiments variously modified therefrom are possible to those skilled in the art.

Therefore, the true technical protection scope of the present invention should include not only the above embodiments but also variously modified other embodiments according to the technical spirit of the invention described in the claims below.

100: stirring tank
110: agitator
120: inlet
130: blower
140: outlet
141: discharge screw
150: removal table
200: axis of rotation
210: suction hole
220: gas exhaust port
230: rotation motor
300: blade
310: first horizontal part
320: second horizontal part
330: connection part
340: stirring blade
400: heat exchanger
410: blowing pipe
420: oxygen supply device
430: communication pipe
500: combustion chamber
510: pellet storage
520: pellet supply screw

Claims (5)

In the apparatus for treating food waste,
A stirring tank having a cone structure in which food waste is stored, formed in the shape of a hollow cylinder, and whose lower part narrows toward the ground;
a rotary shaft in the form of a circular pipe which is positioned at the center of the stirring tank and rotates, and is formed relatively longer than the stirring tank and has a heating function added through passing of the heated exhaust gas;
It is coupled to be perpendicular to the rotating shaft, and is composed of a first horizontal portion positioned above the rotating shaft, a second horizontal portion positioned below the rotating shaft, and a helical connection portion to cause agitation of food waste inside the mixing tank. blade;
a heat exchanger communicating with the top of the stirring tank to cool the gas discharged from the top of the stirring tank; and
A combustion chamber formed at the bottom of the stirring tank to communicate with the heat exchanger, heating the stirring tank by burning pellets supplied from the outside, and heating and removing odors from the gas cooled in the heat exchanger;
Inside the stirring tank, the object to be treated deposited on the first horizontal portion and the second horizontal portion of the blade is removed, and a plurality of blades are placed horizontally so that they can be removed by contact. Food waste disposal apparatus, characterized in that the removal table is further provided. delete delete delete delete

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