KR101988159B1 - Apparatus for food waste drying - Google Patents

Abstract

The present invention relates to an apparatus for drying food waste, which separates moisture from food waste including moisture and discharges the food waste. The apparatus for drying food waste comprises: an insertion part of a rotary type through which food waste is inserted; a crushing part which is arranged on a lower part of the insertion part, crushes the food waste inserted into the insertion part into a uniform size, and discharges the crushed food waste; a dehydrating part which is arranged on a lower part of the crushing part, discharges moisture by applying pressure to the food waste, and moves the food waste to one side to discharge the same; a drying part which crushes the food waste discharged from the dehydrating part, and discharges the food waste after drying the same by air of high temperature; a pulverizing means which crushes and pulverizes the food waste by a ring-shaped chain mounted on a rotary shaft arranged inside the drying part; a condensing part which generates condensed water by condensing the air discharged after drying the food waste in the drying part, discharges the generated condensed water, and discharges remaining air; and an air supply part which supplies air of high temperature used in drying of the food waste to the inside of the drying part. The air supply part includes a circulation pipe for circulating air discharged from the condensing part to the drying part, and a turbo fan arranged on the circulation pipe, providing power to the air circulated through the circulation pipe, and raises the temperature of the air by frictional heat generated by friction between the surface and the air.

Description

Apparatus for food waste drying

The present invention relates to a food waste drying apparatus, and more particularly, to a food waste drying apparatus for supplying hot air heated by friction heat between a turbo fan and air to dry food wastes. .

Food waste, consisting of agricultural, water and livestock waste and leftovers from food production, distribution, processing and cooking, continues to increase due to the increase in population, living conditions, and quality of food. It is recognized as one of the major causes of pollution problems.

Based on 2015 domestic food waste is about 5.6 million tons / year processing cost about 1 trillion won, about 20 trillion won when estimating the economic value of food resources and to waste, and greenhouse gas emissions of approximately nine million tons or more, such as CO ₂ to be.

At present, food waste is recycled into feed and compost, and non-recyclable food waste is mainly treated with anaerobic digestion to produce methane gas and to treat residual sludge.

However, not only is the efficiency of anaerobic digestion facilities low, there is a problem that the utilization and economic value is low because the generated methane gas content is low. In addition, more than 90% of the remaining food waste that occurs after the digestion process also has to be reprocessed.

Since the food waste generated in the early days contains a large amount of various proteins, it is easy to corrode. Therefore, it is considered an economical and environmentally friendly method to use the collected food waste as feed, compost, and dry it as fuel.

Using food waste as feed, compost and fuel requires the separation of water from the food waste.

Referring to Korean Patent No. 2016-41279 'Food Waste Drying Apparatus, it can be seen that the food waste is dried inside the main body housing heated by the heating heater.

As described above, in order to dry the food waste, a component must be used using energy supplied from the outside, such as a heating heater, and thus, a large amount of energy is required.

In addition, during the food waste drying operation, the food waste should be uniformly in contact with heat, and for this purpose, it is necessary to grind and mix the food waste.

Referring to the Utility Model Registration No. 20-0421159, it can be seen that the stirring rod is rotated inside the digestion tank and configured to stir the food waste.

In addition, referring to Korean Patent Publication No. 2015-56994, it can be seen that the food waste is configured to be crushed and stirred by using a stirring blade in the form of a cutter and a rod.

In the above technique, there is a problem in that the operation of the blade is stopped due to food waste being caught between the stirring blade and the strainer in the process of crushing and stirring the food waste. In addition, there is a problem that the stirring blade hits the solids such as the bones of the animal contained in the food waste and is damaged to reduce the stirring and grinding effect.

The present invention is to solve the above problems, by increasing the temperature of the air supplied by the frictional heat generated by friction with the air during operation of the turbofan for supplying air to supply it to the food waste to be dried It is an object of the present invention to provide a food waste drying apparatus that allows drying of food waste.

In addition, the present invention by the plurality of annular chain mounted in the radial direction on the central axis that rotates at high speed inside the cylindrical drying body so that the food waste can be smoothly contacted with the air supplied by the elevated temperature by crushing and crushing It is an object of the present invention to provide a food waste drying apparatus in which the drying speed is improved.

In order to achieve the above object, the present invention provides a food waste drying apparatus for separating and discharging water from food waste containing water, a rotary type input unit into which food waste is input; A crushing unit disposed under the input unit and crushing and discharging the food waste introduced into the input unit to a uniform size; A dehydration unit disposed under the crushing unit to apply pressure to the food waste so that water is discharged, and move the food waste to one side to discharge the food waste; A drying unit for pulverizing the food waste discharged from the dewatering unit and discharging the food waste to be dried by hot air; Grinding means for crushing and pulverizing the food waste by an annular chain mounted on a rotating shaft disposed inside the drying unit; Condensing the air discharged after drying the food waste in the drying unit to generate and discharge condensed water, and the hot air used for drying the food waste into the condensation unit and the drying unit for discharging the remaining air An air supply unit for supplying; It includes, The air supply unit, the circulation pipe for circulating the air discharged from the condensation unit to the drying unit, disposed on the circulation pipe, provides power to the air circulated through the circulation pipe, the surface And it provides a food waste drying apparatus comprising a turbo fan for raising the air by the frictional heat generated by the friction with the air.

The crushing unit may include a crushing unit body that provides a crushing space, and a pair of crushing gears disposed inside the crushing unit body, and having a crushing blade protruding from the surface to engage with each other and crushing the food waste.

The dewatering part is formed in a predetermined size and shape, and provides a dewatering part main body for providing a space for dehydration of the food waste, and the food waste which is disposed inside the dewatering part main body and flows into the dewatering part main body. A screw convair for discharging the food waste by moving pressure and discharging the food waste from one side to the other side of the main body, and disposed at a predetermined height in the lower portion of the inner side of the dehydrating unit, is lower than the screw conveyor. It may include a dewatering net including a mesh net disposed.

The drying unit has a cylindrical shape that provides a space therein and is disposed inclined such that a rear end of the food waste is discharged 3 to 5 degrees lower than a tip from which the food waste is introduced, and is discharged from the dewatering unit and introduced into the inside. The dried food waste is dried by contact with air heated by the air supply unit, and a drain hole disposed under the drying body to discharge moisture discharged from the food waste to the outside of the drying body. And an exhaust port disposed at one end of the drying body to exhaust steam and odor gas generated during drying of the food waste to the outside of the drying body, and disposed at one end of the drying body to dry the interior of the drying body. It may include an outlet for discharging the made food waste.

The drying body may include a cylindrical outer body, an inner body disposed inside the outer body, and an outer circumferential surface spaced apart from the inner circumferential surface of the outer body by a predetermined distance, and formed of a mesh net.

The spaced space between the outer body and the inner body may communicate with the spaced space between the dewatering unit body and the dewatering net.

The grinding means may include a rotating shaft disposed on the inner central axis of the inner body and the annular chain is disposed at regular intervals, and a motor connected to the rotating shaft to rotate the rotating shaft.

The rotation speed of the rotating shaft may be 300 ~ 600 RPM.

The grinding chain may be in the form of a chain in which metal rings are continuously connected.

An end of the grinding chain may be spaced apart from the inner circumferential surface of the inner body.

The condensation unit may further include a chiller.

The circulation pipe, one end may be connected to the air discharge side of the condensation unit, the other end may be connected to one side of the outer body.

The turbofan may include an impeller having a plurality of protrusions protruding from a surface thereof.

The turbofan may have a triangular pyramid having a height of 1 to 3 mm.

The turbofan may include an impeller having a surface having a surface roughness of Ra100a (400S, 400Z) to Ra200a (800S, 800Z).

The rotation speed of the turbofan may be 10,000 to 70,000 rpm.

The present invention as described above, by increasing the temperature of the air supplied by using the friction heat generated by friction with the air during operation of the turbofan for supplying air to supply it to the food waste to be dried to dry food waste Can be done.

In addition, the present invention by the plurality of annular chain mounted in the radial direction on the central axis that rotates at high speed inside the cylindrical drying body so that the food waste can be smoothly contacted with the air supplied by the elevated temperature by crushing and crushing This improves the drying speed.

1 is a view showing the configuration of a food waste drying apparatus according to an embodiment of the present invention.
2 is a plan view illustrating an example of a configuration of a crushing unit used in the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the configuration of a food waste drying apparatus according to an embodiment of the present invention.

1, the food waste drying apparatus 100 according to an embodiment of the present invention is a rotary type input unit 110, crushing unit 120, dehydration unit 130, drying unit 140, grinding means 150, a condenser 160, and an air supply 170.

Rotary-type input unit 110 is made of a funnel shape having a predetermined size.

Rotary waste input unit 110 is a food waste is a drying object.

The crushing unit 120 is disposed below the rotary type feeding unit 110 to crush the food waste into a predetermined size in a predetermined size, and then discharge it to the dehydrating unit 130 described later.

2 is a plan view illustrating an example of a configuration of a crushing unit used in the present invention.

Referring to FIG. 2, the crushing unit 120 includes a crushing unit body 122 and a crushing gear 124.

The crushing unit body 122 provides a space in which food waste is crushed into a hexahedral shape having a predetermined size.

The crushing gear 124 is disposed in parallel in a pair inside the crushing unit body 122. On the surface of the crushing gear 124, a spiral crushing blade 126 having a predetermined height protrudes from one end to the other end.

The first motor M1 is connected to the central axis of any one of the crushing gears 124. Then, one end of the drive shaft of the crushing gear 124 is disposed with the rotary gears 125 engaged with each other. Therefore, the driving force of the first motor M1 is transmitted to the pair of crushing gears 124 by the rotary gear 125, whereby the pair of crushing gears 124 rotate in opposite directions to each other.

In the present embodiment, the shredding gear 124 is a shape in which a predetermined shredding blade 126 protrudes, but may be formed in the form of a helical gear, a spur gear, or the like, if the food waste can be shredded to a uniform size.

The dewatering unit 130 is disposed below the crushing unit 120 to apply a predetermined pressure to the food waste discharged from the crushing unit 120 to separate the water contained in the food waste. In addition, the dehydration unit 130 allows the food waste to move to the drying unit 140 which will be described later while the dehydration in the food waste proceeds.

The dewatering unit 130 may include a dewatering unit body 132, a screw conveyor 134, and a dewatering net 136.

The dewatering unit body 132 is formed in a predetermined size and shape, and provides a space in which water separation of food waste is performed by the screw conveyor 134 described later.

The crushing unit 120 is disposed above one end of the dehydrating unit body 132 so that the food waste crushed and discharged from the crushing unit 120 may be introduced into the dehydrating unit body 132.

The screw conveyor 134 is disposed horizontally in the dehydration unit body 132.

The second motor M2 is connected to one end of the rotating shaft in the center of the screw conveyor 134, so that the screw conveyor 134 rotates by the second motor M2 and with respect to the food waste introduced into the dehydrating unit body 132. A predetermined pressure is applied to allow for water separation from the food waste.

In addition, the screw conveyor 134 separates the food waste from the water, and moves the food waste to the other side of the dehydration unit body 132 to be discharged to the drying unit 140 to be described later.

Since the screw conveyor 134 is a well known technique, a detailed description thereof will be omitted.

The dewatering net 136 is disposed at a predetermined height at an inner lower portion of the dewatering part main body 132. Here, the dewatering net 136 is disposed lower than the screw conveyor 134.

The dewatering net 136 includes a mesh net in which a plurality of holes having a predetermined size are formed.

The dewatering network 136 discharges the water separated from the food waste by the screw conveyor 134. Water passing through the dehydration net 136 is discharged to the outside through the drain 144B to be described later.

The drying unit 140 is dehydrated in the dewatering unit 130, so that the drying is supplied by supplying hot air to the food waste discharged.

The drying unit 140 includes a drying body 142, an outlet 144A, a drain 144B, and an exhaust 144C.

The drying body 142 is formed in a cylindrical shape having a predetermined length and diameter and providing a space therein.

When the food waste discharged from the dehydration unit 130 is introduced into the drying body 142, the drying body 142 provides a space in which the food waste is dried by hot air supplied through the air supply unit 170, which will be described later. In addition, the drying body 142 provides a space in which crushing and pulverization of the food waste introduced into the interior by the crushing means 150 to be described later.

The drying body 142 may be disposed to be inclined. That is, the drying body 142 may be disposed at one end of the food waste to be dried is higher than the other end of the food waste is dried and discharged. By the inclined arrangement of the drying body 142, the food waste is crushed by the grinding means 150 described later and can move from the inflow side to the discharge side by gravity. The degree of inclination of the lower portion of the drying body 142 may be set to 3 to 5 degrees, it may be set in various ways depending on the needs of the user.

The drying body 142 includes an outer body 142A and an inner body 142B.

The outer body 142A may be cylindrical in shape having a predetermined length and diameter and providing a space therein.

The inner body 142B is rotatably disposed inside the outer body 142A. The inner body 142B may have a cylindrical shape corresponding to the shape of the outer body 142A.

Here, the outer circumferential surface of the inner body 142B is spaced between the inner circumferential surface of the outer body 142A is connected to the separation space between the dewatering unit body 132 and the dewatering net 136 included in the dewatering unit 130.

The inner body 142B may include a mesh net in which a plurality of predetermined holes are formed.

The outlet 144A is disposed at the other end of the drying body 142, that is, the lower side opposite to the portion where the food waste flows from the drying body 142, and discharges the food waste from which water is separated. One end of the outlet 144A is disposed to one side of the inner body 142B, and the other end extends to the outer bottom of the outer body 142A.

One end of the drain port 144B is disposed in the spaced space between the inner body 142B and the outer body 142A, and the other end extends to the outer lower portion of the outer body 142A. The drain 144B drains the water discharged through the inner body 142B of the food waste from the inside of the drying body 142 to the outside.

Here, the water drained through the dehydration net 136 and the water drained through the inner body 142B may be drained to the drain 144B.

The exhaust port 144C is disposed at the other end of the drying body 142, that is, opposite to the portion where the food waste flows from the drying body 142, thereby discharging saturated air and odor gas generated during food waste drying.

The grinding means 150 is disposed inward of the inner body 142B. The grinding means 150 applies an impact force to the food waste introduced into the inner body 142B using an annular chain to crush the food waste into smaller sizes.

The grinding means 150 includes a rotating shaft 152, an annular chain 154 and a third motor M3.

The rotating shaft 152 is disposed on the central axis of the inner body 142B. One end of the rotating shaft 152 may be connected to the third motor M3 for driving the rotating shaft 152. According to the figure, one end of the rotating shaft 152 appears to be connected to the rotating shaft of the screw conveyor 134, but is not actually connected and operates independently of each other.

By the operation of the third motor M3, the rotating shaft 152 may rotate at 300 to 600 RPM.

The annular chain 154 is disposed at regular intervals along the rotation shaft 152 to apply an impact force to the food waste in accordance with the rotation of the rotation shaft 152. The annular chain 154 may have a shape in which metal rings having a predetermined size and load are continuously connected. Here, the size and shape of the metal ring included in the annular chain 154 may be variously set according to the needs of the user.

The length of the annular chain 154 corresponds to the radius of the inner body 142B, but is set such that the end of the annular chain 154 is spaced apart from the inner circumferential surface of the inner body 142B by a predetermined distance (for example, 3 mm). .

The operation of the annular chain 154 will be described.

The annular chain 154 is unfolded in a straight line by centrifugal force in accordance with the rotation of the rotary shaft 152, and impacts the food waste in the unfolded state so that the food waste is crushed to a smaller size. In addition, when an impact is applied to the food waste by the annular chain 154, the food waste may be crushed and moisture may be separated from the food waste at the same time. At this time, the separated water is discharged through the inner body (142B).

In addition, the annular chain 154 stirs the crushed food waste and makes uniform contact with the air inside the inner body 142B so that the food waste is dried.

The condenser 160 is disposed on the exhaust port 144C to condense the saturated air and the malodorous gas exhausted through the exhaust port 144C. Condensed water may be generated and discharged by the condensation of saturated air. Since condensate generation in the condenser 160 is a well-known technique, a detailed description thereof will be omitted.

Here, the condensation unit 160 may further include a chiller (not shown) to facilitate the generation of condensed water and to improve the drying effect in the drying body 142.

A chiller is a cooler that cools a fluid to a low temperature using a solvent such as ammonia or furon to a low temperature which cannot be achieved by cooling water alone. The chiller cools the air exhausted from the exhaust port 144C to a predetermined temperature.

After the condensation water is generated in the condensation unit 160, the air having a predetermined temperature (15 to 20 ° C.) is supplied to the drying unit 140 through an air supply unit 170 to be described later. In this case, the air supplied to the drying unit 140 may be heated up by the frictional heat generated during the operation of the turbo fan to be described later.

The air supply unit 170 generates condensed water in the condensation unit 160, applies predetermined heat to the air discharged from the condensation unit 160, and then supplies it back into the inner body 142B, thereby drying the body ( 142) Allow food waste to dry inside.

The air supply unit 170 includes a circulation pipe 172 and a turbo fan 174.

One end of the circulation pipe 172 is connected to the condensation unit 160, and the other end thereof is connected to one side of the drying body 142 to supply air generated from the condensation unit 160 to the drying body 142.

The turbo fan 174 is disposed on the circulation pipe 172, and rotates and applies a predetermined pressure to the air supplied through the circulation pipe 172 so that the air is more easily supplied. The turbofan 174 may rotate at 10,000 to 70,000 rpm.

In addition, the turbo fan 174 applies a predetermined heat to the air supplied through the circulation pipe 172 to raise the temperature about 40 ~ 60 ℃ than the temperature at the time of inflow, food waste in the drying body 142 To facilitate the drying of the.

Heat application in the turbofan 174 may be performed as follows.

The turbo fan 174 may have an impeller (not shown) of a predetermined shape disposed therein.

An impeller is a mechanism having a plurality of vanes along the periphery of the body and configured to supply fluid in one direction by the vanes as the body rotates. Here, the surface of the components constituting the impeller is processed to have a predetermined roughness (roughness), so that the air supplied through the impeller is in contact with the surface of the components included in the impeller and a predetermined friction is generated, accordingly the friction heat The temperature may rise by applying.

Here, the surface roughness of the components is preferably Ra100a (400S, 400Z) to Ra200a (800S, 800Z).

And, if the surface of the components can have a predetermined roughness, various processing methods can be applied according to the needs of the user.

In addition, the impeller may protrude a plurality of projections in the form of a triangular pyramid having a predetermined height on the surface. Here, the height of the protrusions may be 1 to 3mm, but may be variously set according to the needs of the user.

In this case, the protrusion may be formed by performing a process of forming an unevenness, such as a stepping process.

In the present exemplary embodiment, the impeller is used in the turbo fan 174, but a predetermined pressure may be applied to the supplied air, and the surface of the components may be processed into a roughness or a protrusion may protrude from the surface. If possible, other configurations than impellers may be used.

 The air supplied through the circulation pipe 172 may be applied with a predetermined pressure by the turbofan 174. At this time, the air is rubbed with the surface of the components of the turbofan 174, the temperature of the air rises by the frictional heat generated at this time.

An operation of the present invention configured as described above will be described.

For the treatment of food waste, the drying apparatus according to the invention can be used as follows.

The user inputs the food waste to be dried into the rotary input unit 110.

The injected food waste is introduced into the crushing unit 120 through the rotary type feeding unit 110.

Shred gear 124 shreds food waste. In addition, the crushing gear 124 may crush the food waste uniformly to a predetermined size, so that subsequent dehydration and drying can be performed more easily.

Food waste crushed in the crushing unit 120 is introduced into the dehydration unit (130).

Food waste introduced into the dewatering unit 130 is compressed by a screw conveyor 134 at a predetermined pressure and dewatered. Here, the dehydrated water is discharged downward through the dehydration network 136, and then drained through the drain 144B. The screw conveyor 134 performs dehydration of the food waste by compression, and at the same time, the dehydrated food waste is discharged to the outside of the dehydration unit 130.

Food waste discharged from the dewatering unit 130 is introduced into the drying unit 140.

Food waste introduced into the inner body 142B is crushed by the impact force applied by the annular chain 154, which is the grinding means 150, rotates.

Then, the crushed food waste hits the inner circumferential surface of the inner body 142B and water may be separated.

In particular, when the food waste contains animal bones, shells, etc., it may be crushed to a smaller size by the ring-shaped chain 154 to be dried more easily.

On the other hand, a high temperature dry air is supplied into the drying body 142 through the circulation pipe 172, and used for drying food waste.

And, the food waste dried in the drying body 142 is discharged to the outside through the outlet 144A, the saturated air and odor gas generated in the drying process is discharged through the exhaust port (144C).

Here, the moisture content according to the temperature of the saturated air discharged through the exhaust port 144C is as described in the following [Table 1].

Air temperature (℃) Water vapor content of saturated air (g / Nm ³ ) 15 12.9 20 17.3 25 23.0 30 30.4 35 39.6 40 52 50 83 60 132 70 198 80 293 90 423 100 597

As described in Table 1, it can be seen that the higher the temperature of the air discharged through the exhaust port 144C, the larger the amount of water separation from the food waste.

The air discharged through the exhaust port 144C is condensed in the condenser 160. Here, the condensed water generated in the condensation process is discharged to the outside, the air remaining in the condensation process is supplied back into the drying body 142 through the circulation pipe 172.

At this time, the air supplied through the circulation pipe 172 may pass through the turbo fan 174 and the temperature may increase. The air whose temperature is raised may be supplied to the drying body 142 through the circulation pipe 172 and used for drying.

[Table 2] and [Table 3] are the temperature of the air supplied to the turbo fan 174, the temperature of the air discharged from the turbo fan 174, the amount of air used to dry food waste in a unit, the impeller Rotational speed and surface roughness of the impeller are shown.

Flowing into the turbofan
Air temperature (℃) Turbofan Outlet Air Temperature (℃) The amount of air needed to evaporate 1 kg of water in food waste (kg / min) (Nm ³ / min) Impeller Rotational Speed (rpm) Surface of impeller components
Roughness 15 60 8.40 15,000 Ra100a 15 70 5.40 28,000 Ra100a 15 80 3.57 40,000 Ra150a 15 90 2.44 60,000 Ra200a

Flowing into the turbofan
Air temperature (℃) Turbofan Outlet Air Temperature (℃) The amount of air needed to evaporate 1 kg of water in food waste (kg / min) (Nm ³ / min) Impeller Rotational Speed (rpm) Surface of impeller components
Roughness 20 60 8.72 12,000 Ra100a 20 70 5.53 25,000 Ra100a 20 80 3.63 38,000 Ra150a 20 90 2.47 52,000 Ra200a

Referring to [Table 2] and [Table 3], when the air having a temperature of 15 ° C. is raised to a temperature of 90 degrees in the turbofan 174, it is necessary to evaporate water 1 (kg / min) contained in the food waste. The amount of air is 2.44 (Nm ³ / min), but if the air temperature of 20 ° C is raised to 90 degrees in the turbofan 174, the amount of air required to evaporate 1 (kg / min) of water contained in the food waste is It can be seen that it is 2.47 (Nm ³ / min).

As can be seen from the above [Table 2] and [Table 3], even if the temperature of the air supplied into the drying body 142 is the same, if the temperature rising degree is large, the unit evaporation amount (water 1kg / min) It can be seen that the amount of air to be obtained is small.

Therefore, the condensation in the condensation unit 160 is to be made as low as possible, so that the temperature of the air discharged from the condensation unit 160 is lowered.

The user may continue to feed the food waste through the rotary input unit 110, the air discharged from the condensation unit 160 is heated to be supplied into the drying body 142, so that the food waste can be dried. .

The present invention as described above, by increasing the temperature of the air supplied by using the friction heat generated by friction with the air during operation of the turbofan for supplying air to supply it to the food waste to be dried to dry food waste The food waste may be crushed and crushed by a plurality of annular chains mounted radially on a central axis rotating at a high speed inside the cylindrical drying body, so that contact with the supplied air may be smoothly performed. Due to this, the drying speed can be improved.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

100: food waste drying apparatus 110: rotary input unit
120: crushing unit 130: dewatering unit
140: drying unit 150: grinding means
160: condenser 170: air supply

Claims (16)

Food waste drying apparatus that separates and discharges water from food waste containing water,
Rotary type feeding section for feeding food waste;
A crushing unit disposed under the input unit and crushing and discharging the food waste introduced into the input unit to a uniform size;
A dehydration unit disposed under the crushing unit to apply pressure to the food waste so that water is discharged, and move the food waste to one side to discharge the food waste;
A drying unit configured to discharge the food waste discharged from the dewatering unit so as to be dried by hot air;
Grinding means for crushing and pulverizing the food waste by an annular chain mounted on a rotating shaft disposed inside the drying unit;
A condensation unit for condensing saturated air discharged after drying the food waste in the drying unit to generate and discharge condensate, and discharging the remaining air;
An air supply unit supplying high temperature air used to dry the food waste into the drying unit; Including,
The air supply unit,
A circulation tube circulating air discharged from the condensation unit to the drying unit;
A turbofan disposed on the circulation pipe to provide power to the air circulated through the circulation pipe and to heat up the air by frictional heat generated by friction between the surface and the air,
The dewatering part,
A dewatering unit body having a predetermined size and shape and providing a space for dehydration of the food waste;
A screw conveyor disposed inside the main body of the dehydration unit and applying pressure to the food waste flowing into the main body of the dehydration unit to dehydrate the food waste, and moving the food waste from one side of the dehydration unit body to the other side and discharging the screw conveyor. convair),
Is disposed at a predetermined height on the inner lower portion of the dewatering unit body, including a dewatering net including a mesh net disposed lower than the screw conveyor,
The drying unit,
The food waste is provided in a cylindrical shape arranged to be inclined so as to be 3 to 5 degrees lower than the front end to the food waste is introduced into the space, the food waste is discharged from the dewatering portion introduced into the inside The drying body is dried by the contact with the air heated by the air supply,
A drain hole disposed below the drying body to discharge moisture discharged from the food waste to the outside of the drying body;
An exhaust port disposed at one end of the drying body to exhaust steam and odor gas generated during drying of the food waste to the outside of the drying body;
The food waste drying apparatus is disposed to one end of the drying body, the outlet for discharging the food waste is dried in the drying body. The method of claim 1,
The shredding part,
A shredding unit body providing a shredding space,
And a pair of crushing gears disposed in the crushing unit body, and having a crushing blade protruding from the surface thereof to engage with each other and crushing the food waste. delete delete The method of claim 1,
The drying body,
Cylindrical outer body,
It is disposed inside the outer body, the outer peripheral surface food waste drying apparatus comprising an inner body made of a mesh net spaced apart from the inner peripheral surface of the outer body by a predetermined distance. The method of claim 5,
The space between the outer body and the inner body is the food waste drying apparatus in communication with the space between the dewatering unit body and the dewatering net. The method of claim 5,
The grinding means,
A rotation shaft disposed on an inner central axis of the inner body and the annular chains are arranged at regular intervals;
Food waste drying apparatus comprising a motor connected to the rotary shaft to rotate the rotary shaft. The method of claim 7, wherein
Rotational speed of the rotating shaft is 300 ~ 600 RPM food waste drying apparatus. The method of claim 7, wherein
The annular chain is,
Food waste drying device in the form of a chain consisting of a metal ring connected continuously. The method of claim 9,
End of the annular chain food waste drying apparatus is spaced apart from the inner peripheral surface of the inner body. The method of claim 1,
The condensation unit,
Food waste drying apparatus further comprises a chiller (Chiller). The method of claim 5,
The circulation pipe,
One end is connected to the air discharge side of the condensation, the other end food waste drying apparatus is connected to one side of the outer body. The method of claim 1,
The turbo fan,
Food waste drying apparatus comprising an impeller protruding a plurality of projections on the surface. The method of claim 13,
The turbo fan,
The protrusion is a food waste drying device of the form of a triangular pyramid of 1 to 3mm in height. The method of claim 1,
The turbo fan,
Food waste drying apparatus comprising an impeller having a surface roughness Ra100a (400S, 400Z) to Ra200a (800S, 800Z). The method according to claim 13 or 15,
The rotation speed of the turbo fan is 10000 to 70000 rpm food waste drying apparatus.

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