KR100991719B1 - Manufacturing method of solid fuel using food waste - Google Patents

Abstract

PURPOSE: A manufacturing method of solid fuel using food waste is provided to collect the energy and resource by recycling the waste food as solid fuel because the method shows how to effectively dry the waste food including high moisture to be used as a raw material of a solid fuel. CONSTITUTION: A manufacturing method of solid fuel using food waste includes next step; a step of generating the dry food waste which removed the moisture by indirectly heating the food waste in drier with stream(S10), a step of putting the dried food waste by heating the oil to high temperature which can evaporate the steam, a step of decomposing the dried food waste into small particles by stirring it and evaporating the moisture included in the food waste by frying with the heated oil with steam, a step of extracting included oil by compressing the solid part of the food waste, a step of manufacturing the solid gasoline by using the solid part which oil is extracted. The drier includes a drum which food waste is put, a shaft comprised into pipe structure to inject the steam inside, a plurality of disc to connected the inside of the shaft to inject steam inside, a jacket forming a constant space between the jacket and the outer surface of the drum, and a inhaling pan which inhales the moisture which evaporated from the food waste heated by the steam.

Description

Manufacturing method of solid fuel using food waste

The present invention relates to a method for producing solid fuel using food waste, and more particularly, to dry food waste containing high moisture discharged from a home or a restaurant with hot steam, and then mixed with pork oil or fried in oil. It relates to a method for producing a solid fuel using food waste that can be produced with a solid fuel.

As food waste from general households or restaurants is highlighted as a cause of serious environmental pollution, technologies for disposing of such food waste are continuously being developed.

Recently, many researches and efforts have been made on the treatment of such food wastes. For example, food wastes are fermented and recycled into animal feed or organic fertilizers, or water contained in food wastes is incinerated, such as general waste. The main way is to use it.

However, the water content of the food waste is generally about 80 to 90%, and even if the food waste is dehydrated in a conventional dehydration device, the water content of about 30 to 40% is still maintained. When the water content of the dehydrated food waste is high, drying or fermentation proceeds slowly, and provides a suitable environment for bacteria to propagate when dried or fermented, and contaminates the surrounding soil and generates odors.

Recently, the development of alternative energy has been actively discussed as a way to solve the problem of depletion of fossil fuels and environmental pollution. Therefore, recycling of the food waste into solid fuel may be considered.

However, in order to produce solid fuel using food waste, the moisture content of food waste is so high that it is necessary to develop a drying method that can lower the moisture content of food waste appropriately. The problem of not high should be solved.

The present invention was created in view of the above-mentioned problems in the prior art, and is designed to solve this problem, and to efficiently dry food wastes containing high moisture discharged from homes and restaurants, and to increase the amount of heat generated in the dried food wastes. The main problem is that by mixing the auxiliary materials for recycling to recycle the solid fuel, it is possible to recover the energy and resources, and to prevent the environmental pollution caused by the disposal of food waste.

Solid fuel manufacturing method using the food waste according to the present invention as a means for solving the above problems, the step of indirectly heating the food waste from the dryer to steam, generating a dry food waste from which moisture is removed; Preparing a food waste-oil dough by mixing the dry food waste discharged from the dryer and the pork oil extracted from the pig processing residue; The food waste-oil dough is pressed to form a solid fuel of a pallet structure; is configured to include.

In another aspect, the present invention, the step of indirectly heating the food waste to the steam in the dryer, producing a dry food waste from which moisture is removed; Preparing a food waste-oil dough by mixing the dry food waste discharged from the dryer and the pork oil extracted from the pig processing residue; Firstly drying the sludge generated in the treatment of waste water with steam in a dryer; Mixing the food waste-oil dough with the first dried sludge to form a food waste-sludge mixture while secondaryly drying the sludge; Compressing the food waste-sludge mixture to form a solid fuel of the pallet structure; may be configured to include.

In another aspect, the present invention, the step of indirectly heating the food waste to the steam in the dryer, producing a dry food waste from which moisture is removed; Injecting dry food waste by heating the oil to a high temperature capable of vapor evaporation; Agitating the dried food waste put into the heated oil with a rotating stirrer to decompose it into small particles, and frying with heated oil to evaporate the water contained in the dried food waste into steam; Extracting the oil contained by compressing the solid content of the food waste from which water is evaporated; It may be configured to include a; producing a solid fuel using the solid extracted oil.

And in the present invention, the dryer, the drum is inserted into the food waste, the shaft is installed in the transverse direction at the center of the drum is made of pipe structure so that the steam can be injected into the inside, fixedly coupled to the outer periphery of the shaft therein In order to inject steam, a plurality of disks communicated inside the shaft, a jacket surrounding the outside of the drum and forming a space between the outer peripheral surface of the drum so that steam can be injected, and food waste heated indirectly by steam. Characterized in that it comprises an intake fan for sucking the evaporated water to the outside of the drum.

According to the present invention, it is possible to recover the energy and resources by recycling the high-moisture-containing food waste discharged from the home or restaurant as a solid fuel.

In addition, according to the present invention, it is possible to efficiently dry food waste containing high moisture to be used as a raw material of solid fuel.

1 is a flow chart showing a method of manufacturing a solid fuel according to the first embodiment of the present invention.
2 and 3 are a front view and a side view showing the configuration of the dryer according to the present invention.
Figure 4 is a side view showing the disk configuration of the dryer according to the present invention.
5 is a flow chart showing a method of manufacturing a solid fuel according to a second embodiment of the present invention.
6 is a flow chart showing a method of manufacturing a solid fuel according to a third embodiment of the present invention.
7 is a block diagram showing an apparatus for manufacturing solid fuel according to a third embodiment of the present invention.
8 to 10 are cross-sectional views showing the configuration of the oil extractor in the solid fuel production apparatus according to a third embodiment of the present invention.

Hereinafter will be described in detail a preferred embodiment of the solid fuel manufacturing method using food waste according to the present invention.

First, with reference to FIGS. 1 to 4 looks at a first embodiment of a solid fuel manufacturing method using food waste according to the present invention.

1 shows a method for producing a solid fuel using food waste according to a first embodiment of the present invention, Figures 2 and 3 are shown the configuration of the dryer according to the invention, Figure 4 in the present invention The disc configuration of the dryer is shown.

Referring to FIG. 1, in the method of manufacturing solid fuel using food waste according to the first embodiment of the present invention, a step of generating dry food waste from which moisture is removed by indirectly heating food waste with steam in a dryer (S10) is described. ), And mixing the dried food waste discharged from the dryer and the pork oil extracted from the pig processing residue (S12) to prepare a food waste-oil dough, and the food waste-oil dough is pressed to compress the solid fuel of the pallet structure It is configured to include a step (S14).

2 to 4, the dryer for drying the food waste with steam is installed in the drum 10 and the drum 10 into which the food waste of high moisture content discharged from a home or a restaurant is introduced. It comprises a rotating shaft 30, a plurality of disks 40 fixedly coupled to the outer periphery of the shaft 30, more preferably the motor 50, the shaft 30 for rotating the shaft 30 It is preferably configured to include a shaft inlet 32 for injecting steam into the inside, and an intake fan (not shown) for discharging moisture evaporated from the food waste to the outside.

The drum 10 has a space formed therein so that food waste for water removal may be temporarily stored therein, an inlet 12 for feeding food waste, and a dry food waste from which moisture is removed. It has a structure having a discharge port (14). At this time, in order to discharge the food waste to the outside of the drum 10, in addition to the outlet 14 may be further provided with an auxiliary outlet 16, the auxiliary outlet 16 is the food waste remaining in the drum (10) It serves to discharge the remaining amount to the outside of the drum (10).

And the shaft 30 is installed in the transverse direction at the center of the drum 10 rotates, it is made of a pipe structure so that hot steam can be injected therein. That is, the outside of the drum 10 is provided with a motor 50 for generating a rotational force, a chain gear 52 for transmitting the rotational force of the motor 50 to an appropriate gear ratio to the shaft 30, etc. The rotational force of the motor 50 is transmitted to the shaft 30 through the chain gear 52 to rotate the shaft 30.

The shaft inlet 32 for injecting steam into the shaft 30 is connected to one end of the shaft 30, and the steam deprived of heat while passing through the shaft 30 is condensed to the other end of the shaft 30. The shaft outlet 34 for discharging in the form is connected. Therefore, when the high temperature steam is injected into the shaft 30 through the shaft inlet 32, the steam injected into the shaft 30 is deprived of heat in the process of vaporizing the water contained in the food waste to change into a condensed water form. Then, it is discharged to the outside of the drum 10 through the shaft outlet 34.

On the other hand, since only the heat generated from the steam injected into the shaft 30 can vaporize the water contained in the food waste located around the shaft 30, the heat of vaporization to all the food waste introduced into the drum 10. In order to supply, in the present invention, a plurality of disks 40 are fixedly coupled to the outer circumference of the shaft 30.

Referring to FIG. 4, each disk 40 fixedly coupled to the outer circumference of the shaft 30 has a structure in communication with the inside of the shaft 30 to allow steam to be injected therein. That is, each disk 40 is fixedly coupled to the outer periphery of the shaft 30 to rotate together with the shaft 30, and also the structure in which the inside of each disk 40 and the inside of the shaft 30 communicate with each other Consisting of high temperature steam injected into the shaft 30 is also injected into the disk (40).

Therefore, when hot steam is injected into the shaft 30 through the shaft inlet 32, the steam injected into the shaft 30 is also injected into each of the disks 40, and thus, the inside of the shaft 30 and the disk ( 40) The steam injected into the steam is taken out of the food waste while evaporating the heat and converted into condensed water, and then discharged to the outside of the drum 10 through the shaft outlet 34. In addition, since the disk 40 having a large surface area rotates together with the shaft 30, the vaporization heat of steam injected into the disk 40 can be transmitted to most of the food waste introduced into the drum 10.

To this end, the disk 40 has a structure in which two thin plates 42 constituting a conical structure are opposed to each other, and the shaft 30 penetrates the center thereof, and the inside of the disk 40 and the shaft 30 are formed. It is preferable that the inside of the is communicated with each other so that the steam passing through the inside of the shaft 30 can be configured to be injected into the disc 40.

In addition, the dryer according to the present invention, in order to more efficiently remove the moisture contained in the food waste, the jacket 20 surrounding the outside of the drum 10, and the space (A) between the jacket 20 and the drum 10 Preferably, the jacket further includes a jacket inlet 22 through which steam is injected.

That is, the drum 10 is seated inside the jacket 20, and a space A is formed between the inner circumferential surface of the jacket 20 and the outer circumferential surface of the drum 10, and formed on one side of the jacket 20. The hot steam injected through the jacket inlet 22 is injected into the space A between the jacket 20 and the drum 10 to supply the vaporization heat to the drum 10.

Therefore, the steam injected into the space A between the jacket 20 and the drum 10 through the jacket inlet 22, and the steam injected into the shaft 30 and the disk 40 through the shaft inlet 32. By indirectly heating the food waste introduced into the drum 10, the water contained in the food waste can be more efficiently evaporated and removed.

On the other hand, in order for the water contained in the food waste to evaporate, since the temperature at which the water can evaporate, that is, a boiling point of water of 100 ° C. or more, heat must be applied to the food waste, the interior of the shaft 30 and the disk 40, and the jacket 20. The temperature of the steam injected into the space A between the drum and the drum 10 to supply the vaporization heat to the food waste is preferably heated to about 100 ° C. to 120 ° C., more preferably about 110 ° C.

In addition, the intake fan (not shown) is a component provided to discharge moisture evaporated from the food waste inside the drum 10 to the outside of the drum 10. That is, the water contained in the food waste is evaporated in the form of water vapor by the high temperature steam injected into the shaft 30 and the disk 40. Thus, the water evaporated in the food waste is the drum 10 by the intake fan. It is discharged to the outside.

Therefore, food waste of high moisture content discharged from the home or restaurant is subjected to the following drying process in the dryer.

First, food waste having a high moisture content is introduced into the drum 10 through the inlet 12. In addition, when hot steam is injected through the shaft inlet 22, the injected steam is injected into the shaft 30 and the disk 40. In addition, when hot steam is injected through the jacket inlet 22, the injected steam is injected into the space A between the jacket 20 and the drum 10. Thereafter, when the shaft 30 is rotated by driving the motor 50, the shaft 30 and the disk 40 rotate together.

By the steam injected into the rotating shaft 30 and the disk 40 and the steam injected into the space (A) between the jacket 20 and the drum 10, the food waste inside the drum 10 By indirect heating, the water contained in the food waste is evaporated, and the evaporated water is discharged to the outside by the intake fan. In addition, the water vapor discharged to the outside of the drum 10 goes through a process of condensation by water at room temperature.

In addition, steam injected into the shaft 30 and the disk 40 to indirectly heat food waste is discharged to the outside of the drum 10 through the shaft outlet 34 to condense, and moisture is removed from the drum 10. The dry food waste is discharged out of the drum 10 through the outlet 14 and the auxiliary outlet 16.

That is, through the above water removal process, the food waste put into the dryer is generated as dry food waste having a low moisture content and then discharged to the outside of the drum 10.

And the dry food waste treated and discharged by the dryer configured as described above contains about 10% to 15% of moisture so that it is suitable for use as a raw material of solid fuel rather than being completely removed.

However, when the fuel is molded using only the dried food waste, it is difficult to form fuel by itself because the amount of heat is reduced, so it is preferable to mix the fuel with food waste to add additional materials that can increase the amount of heat.

To this end, the present invention is configured to be able to fuel by mixing the pork oil extracted from the pig processed residue to the dry food waste of which the moisture content is significantly lowered through the dryer. This pig oil is an oil component extracted from pig processing residue (bone, oil, internal organs, leather, etc.) generated during the slaughter or processing of pigs, and shows a calorific value of approximately 10,000 kcal / kg, so that the calorific value is relatively high. It can be a good supplement for fueling low food waste.

Therefore, the food waste-oil dough is prepared by mixing the low moisture dry food waste discharged from the dryer and the pork oil extracted from the pig processing residue.

At this time, it is preferable that the amount of dry food waste and pork oil added for the production of food waste-oil dough is set at a ratio of about 7 to 3. However, the amount of pork oil can be adjusted according to the type of dry food waste, moisture content, and calorific value.

The food waste-oil dough thus prepared is compressed to undergo a process of being formed into a solid fuel of a pallet structure.

Next, with reference to Figure 5 looks at a second embodiment of a solid fuel manufacturing method using food waste in accordance with the present invention.

Figure 5 shows a method for producing a solid fuel using food waste according to a second embodiment of the present invention.

Referring to FIG. 5, in the manufacturing method of the solid fuel using the food waste according to the second embodiment of the present invention, dry food in which moisture is removed by indirectly heating food waste with steam in a dryer as in the first embodiment described above. Generating garbage (S10), and mixing the dried food waste discharged from the dryer and the pork oil extracted from the pig processing residue to prepare a food waste-oil dough (S12), after which the treatment of waste water Drying the sludge produced in the process by steam in a dryer (S16) and mixing the food waste-oil dough for the first dried sludge to form a food waste-sludge mixture while drying the sludge second Step (S18), and further comprising the step of pressing the food waste-sludge mixture to form a solid fuel of the pallet structure (S20) .

On the other hand, the process of producing the dried food waste (S10) and the configuration of the dryer for this, and the process of producing a food waste-oil dough by mixing the dry food waste and pork oil (S12) and the first embodiment Since the same, detailed description is omitted.

In the second embodiment of the present invention, sludge generated during the treatment of wastewater is used as an additional material for increasing the calorific value of food waste. The sludge has a very high moisture content and its calorific value is only 2,000kcal / kg or less. However, the dry sludge, which has greatly reduced the moisture content during the drying process, exhibits a calorific value of approximately 4,000kcal / kg, thereby fueling the food waste. It can be a good auxiliary material for you.

In addition, by using the sludge as a solid fuel material as described above, it is possible to recover energy and resources without treating in a manner that may cause environmental pollution such as landfilling or dumping at sea.

In addition, the first drying process of the sludge generated during the treatment of wastewater will be described in more detail.

The first drying process of the sludge is made in the same manner as the drying process of the food waste described above by the dryer shown in Figs.

That is, the sludge of high moisture content is introduced into the drum 10 through the inlet 12. In addition, when hot steam is injected through the shaft inlet 22, the injected steam is injected into the shaft 30 and the disk 40. In addition, when hot steam is injected through the jacket inlet 22, the injected steam is injected into the space A between the jacket 20 and the drum 10. Thereafter, when the shaft 30 is rotated by driving the motor 50, the shaft 30 and the disk 40 rotate together.

The sludge in the drum 10 is indirectly caused by the steam injected into the rotating shaft 30 and the disk 40 and the steam injected into the space A between the jacket 20 and the drum 10. By heating, the primary drying process in which the water contained in the sludge is evaporated proceeds.

In addition, steam injected into the shaft 30 and the disk 40 to indirectly heat the sludge is discharged to the outside of the drum 10 through the shaft outlet 34 and condensed. Dried sludge remains.

When the sludge containing high moisture of about 80 to 90% is introduced into the drum 10 of the dryer and first dried by high temperature steam, the sludge is in the form of a dough containing about 40 to 50% of moisture. Will remain in the drum (10).

And when mixing the food waste-oil dough produced before the first dried sludge in this way, the water inside the sludge is agglomerated by the oil, and at the same time the internal temperature of the sludge is heated to 100 ° C or more to vapor evaporation by the oil As a result, a secondary drying process is performed in which water in the sludge is evaporated.

That is, when the food waste-oil dough containing oil is mixed with the sludge heated to 80 to 95 ° C. by the high temperature steam in the first drying process, the moisture content is reduced to about 5 to 15% as the moisture inside the sludge evaporates. A secondary drying process will take place.

When the secondary drying process is completed, a food waste-sludge mixture with significantly reduced moisture content is produced and discharged from the dryer.

Thereafter, the food waste-sludge mixture subjected to the second drying process is compressed to form a solid fuel having a pallet structure.

Next, with reference to Figures 6 to 10 looks at a third embodiment of a solid fuel manufacturing method using food waste according to the present invention.

6 and 7 illustrate a method and apparatus for manufacturing a solid fuel according to a third embodiment of the present invention, respectively, and FIGS. 8 to 10 show oils in the solid fuel manufacturing apparatus according to the third embodiment of the present invention. The configuration of the extractor is shown.

Referring to FIG. 6, in the method of manufacturing solid fuel using food waste according to the third embodiment of the present invention, dried foods in which moisture is removed by indirectly heating food waste with steam in a dryer as in the first embodiment described above. It includes a step (S10) of generating waste, and then heating the oil to a high temperature capable of vapor evaporation to inject dry food waste (S22), by stirring the dry food waste put into the heated oil with a stirrer to rotate Decomposing into small particles, fried with heated oil to evaporate the water contained in the dry food waste with water vapor (S24), extracting the oil contained by compressing the solid content of the food waste evaporated water (S32) And, and further comprising the step (S36, S42) for producing a solid fuel using the solid extracted oil.

On the other hand, the process of generating the dry food waste (S10) and the configuration of the dryer for this is the same as the first embodiment described above, detailed description thereof will be omitted.

In the third embodiment of the present invention, unlike the above-described first and second embodiments, a method of frying in heated oil is used, as opposed to the first and second embodiments, as a means for increasing the amount of dry food waste. That is, by drying the dry food waste in the heated oil, the moisture content of the dry food waste is further lowered and at the same time, the oil content is increased.

As such, the configuration of the manufacturing apparatus for manufacturing the solid fuel according to the third embodiment of the present invention is as follows.

Referring to FIG. 7, in the solid fuel production apparatus using the food waste of the third embodiment, the hopper 1 into which the dry food waste is put and the dry food waste transferred from the hopper 1 are splashed with hot oil to remove moisture. It comprises a oil extractor (6) for extracting the oil contained in the solids by pressing the water remover (2) to remove, the food waste solids (hereinafter referred to as 'solid content') evaporated water in the water remover (2).

In addition, before the solids discharged from the water remover 2 are immediately sent to the oil extractor 6 to extract the contained oil, it is preferable that the oil can be extracted in advance as follows.

To this end, the solid fuel production apparatus according to the third embodiment of the present invention, the mesh separator (3), the mesh separator (3) for filtering out relatively fine solids and oil from the solids and oil discharged from the water remover (2) Centrifuge (4), which separates only the oil from the oil and fine solids filtered out from the oil), relatively large solids not filtered out from the mesh separator (3) and relatively fine solids separated from the centrifuge (4). It is preferably configured to further comprise a temporary storage (5) for storing and transferring to the oil extractor (6).

In addition, the hopper 1 into which the dry food waste is input, has a large space therein so that a large amount of dry food waste, which has been dried by steam in a dryer, is formed, and a relatively large inlet is formed at the top. In the lower part, a relatively small outlet is formed to discharge a certain amount of dry food waste.

And a large amount of oil is stored in the moisture remover 2, the oil stored in the moisture remover 2 is heated to a high temperature capable of vapor evaporation. Therefore, the dry food waste transferred from the hopper 1 to the moisture remover 2 is fried by oil heated to a high temperature, and in the process, most of the moisture contained in the dry food waste is evaporated and removed.

In this case, when the dry food waste is fried as it is, only the outside of the dry food waste may be fried and the inside may not be fried, and in this case, moisture may remain in the inside of the dry food waste. In order to prevent this, in the present invention, a stirrer (not shown) that is rotated in a horizontal or vertical direction is installed inside the moisture remover 2, and the dry food waste is decomposed into small particles by the rotating stirrer, and dried. Even inside the food waste, it is preferable that all of the food is fried so that the water can evaporate.

The moisture removed from the dried food waste is evaporated in the form of water vapor, and the vaporized water vapor is discharged to the outside by a fan (not shown) that sucks internal air to the outside. At this time, the water vapor discharged to the outside is preferably condensed by water at room temperature, it is preferably configured to be discharged to the waste water.

On the other hand, the oil stored in the water remover (2) and used to fry the dry food waste, oil extracted from animal products such as pigs, waste cooking oil, oil extracted from fish may be used.

The oil heated in the moisture remover 2 should be heated to a temperature at which water contained in the dry food waste can evaporate, that is, a high temperature of 100 ° C. or higher, which is the boiling point of water, and preferably heated to 110 ° C. to 140 ° C., more preferably. Preferably it is heated to about 120 ℃.

On the other hand, in the third embodiment, unlike the first embodiment described above, the water content of the dried food waste discharged from the dryer may be somewhat higher. And the food waste solids discharged after being fried by the heated oil in the water remover (2) will contain about 3 to 4% of water. Therefore, the food waste solids evaporated while passing through the water remover 2 contain only a minimum of moisture, so that the calorific value is increased, and thus it can be used as a better solid fuel raw material.

On the other hand, the dry food waste put into the moisture remover (2) is splashed by hot oil, the contained moisture is evaporated, and at the same time is decomposed into various sizes by a stirrer and discharged. In this way, among the food waste solids and oils of various sizes discharged from the water remover 2, the relatively fine solids and oil are filtered out by the mesh separator 3, and the relatively large solids are not filtered out. It is transferred to) and stored temporarily. As such, the mesh separator 3 has a screen structure in the form of a mesh so that solids and oil can be separated according to the size.

That is, while solids and oils of various sizes discharged from the water remover 2 pass through the mesh separator 3 of the screen structure, solids large enough to not pass through the screen are not filtered out of the mesh separator 3 as they are. The solids and oil that are fine enough to be transferred to the reservoir 5 and pass through the screen are passed through the screen of the mesh separator 3 and filtered down.

In this way, the fine solids and oil filtered down to the bottom of the mesh separator 3 are separated into solids and oil in the centrifuge 4 again. To this end, the centrifuge 4 is configured to operate in a centrifugal manner, so that the fine solids and oil filtered out of the mesh separator 3 are separated from each other by centrifugal separation in the centrifuge 4.

And the oil separated in the centrifuge (4) is again transferred to the water remover (2) joined to the oil to fry the dry food waste is recycled, the fine solids separated in the centrifuge (4) to the temporary storage (5) It is transported and temporarily stored with relatively large solids that are not filtered out of the mesh separator 3.

As described above, the temporary storage 5 is a device in which relatively large solids not filtered out of the mesh separator 3 and relatively fine solids separated from the centrifuge 4 are temporarily collected and stored together. The reason why the solids are temporarily stored in the temporary storage 5 is because a certain amount of solids must be gathered together and transferred to the oil extractor 6 to be used in the compression process.

A certain amount of solids collected in the temporary storage (5) is transferred to the oil extractor (6) to undergo a compression process, through which the oil contained in the solid content is extracted. The oil extracted from the oil extractor 6 is transferred to the water remover 2 again and joined to the oil to fry the dry food waste, and recycled.

Meanwhile, the present invention extracts most of the oil from the fried food waste solids, and sends the oil extracted from the solids to the water remover (2) to increase energy efficiency, and also remove most of the water and oil from the food waste. It is preferable that it is comprised so that solid content may be utilized as a raw material of solid fuel.

To this end, in the present invention, the oil is firstly extracted from the mesh separator 3 and the centrifugal separator 4 with respect to the food waste solids fried with oil in the water remover 2, and again in the oil extractor 6. To extract the remaining oil.

In order to efficiently extract oil from the fried food waste solids, the oil extractor 6 according to the present invention is preferably configured as follows.

8 to 10, the oil extractor 6 constituting the solid fuel production apparatus according to the third embodiment of the present invention, the storage unit for receiving the solid (A) transferred from the temporary storage (5) ( 61 and the cylinder 63, which is in communication with the lower side of the storage portion 61, and the solids are introduced, and penetrated at one end of the cylinder 63 so that the oil separated from the solids can flow out of the cylinder 63. A first piston 65 for compressing solids by moving forward and backward within the deoiling hole 64, the cylinder 63, and an agent for advancing to one end of the cylinder 63 to support the first piston 65. It consists of two pistons 66.

The storage unit 61 has a structure in which the solids transferred from the temporary storage 5 are accommodated, and an injection hole 62 for penetrating the solids through the cylinder 63 is formed therethrough.

Here, the solid content (A) accommodated in the storage unit 61 is broken into small particles by the stirrer rotating in the water remover (2) is splashed by oil to remove the water, the mesh separator (3) And the food waste solids in which oil was separated primarily by the centrifuge (4).

In addition, the cylinder 63 communicates with the lower side of the storage portion 61 through the injection hole 62, therein, the solid content introduced from the storage portion 61 is accommodated, and the first piston 65 reciprocates. It is made of a structure in which an empty space is formed in the longitudinal direction to enable.

In addition, at one end of the starch thin solid content in the cylinder 63 is compressed by the first piston 65 and the second piston 66, the oil extracted from the solid content through the compression can escape to the outside of the cylinder 63. The deoiling hole 64 is formed so as to penetrate, and the oil extracted from the solid content is discharged to the outside of the cylinder 63 through the deoiling hole 64 and then transferred to the water remover 2 and recycled.

In addition, the first piston 65 moving back and forth within the cylinder 63 moves backward in the other direction, as shown in FIG. 8, to allow the reservoir 61 and the cylinder 63 to communicate with each other. It is configured to allow the solid content A to be introduced from the storage portion 61 into the cylinder 63 by opening the mold, and to move forward in one direction to compress the solid content as shown in FIG. 9.

9, the second piston 66 moves forward to one end of the cylinder 63 to close one end of the cylinder 63 and simultaneously compresses the solids as shown in FIG. 9. 10, one end of the cylinder 63 is opened so that the compressed solid B may move back out of the cylinder 63 as shown in FIG. 10.

In addition, the oil extractor 6 according to the present invention further includes a first pump 67 and a second pump 68 for moving the first piston 65 and the second piston 66 back and forth, respectively. It is desirable to be.

On the other hand, the food waste solids discharged from the water remover (2) contains about 40 to 50% of the oil content, the solids through the oil extraction process is about 10 to 20 to be suitable as a raw material of the solid fuel It is preferably configured to contain about% oil.

In this way, the oil is extracted from the oil extractor 6, and food waste solids containing a certain amount of oil may be used as solid fuels, or auxiliary materials for increasing calories in food waste solids containing a certain amount of oil may be used. It may be mixed to produce a solid fuel.

And it looks at the operation of the solid fuel manufacturing apparatus according to a third embodiment configured as described above.

First, the oil is heated to a high temperature capable of vapor evaporation. After the oil is heated to a high temperature capable of vapor evaporation, the dried food waste is put into the heated oil (S22).

Then, the dried food waste introduced into the heated oil is fried to evaporate the water contained in the steam (S24). As such, the dry food waste introduced into oil is broken down into small particles by a rotating stirrer, splashed by heated oil to remove moisture, and then discharged into solids and oil of various sizes. And by filtering the relatively fine solids and oil from the solids and oils of various sizes discharged from the above, leaving only a relatively large solids (S26). Separation of solids and oils according to this size is achieved through a screen of the mesh structure.

Subsequently, the first solidification process removes only oil from the fine solids and oil filtered through the screen, and the fine solids and the oil are separated from each other by centrifugation (S28). The oil extracted first from the fine solids is transferred to the process of frying the first dry food waste and joined with the fried oil to be recycled.

The large solids not filtered through the screen and the fine solids filtered off the screen and separated from the oil again are collected in a temporary storage for temporary storage (S30). In this way, the solids of various sizes temporarily stored in the temporary storage, that is, the relatively large solids not filtered out by the screen, and the fine solids separated from the oil after being filtered out of the screen are pressed together, and the oil contained in the solids is extracted secondarily. (S32).

Thus, the process of secondary extraction of the oil contained by compressing the solid content is carried out as follows.

First, as shown in FIG. 8, the food waste solids transferred from the temporary storage 5 are transferred to the storage 61, and then the first piston 65 moves backward in the cylinder 63 to insert the injection hole ( When the 62 is opened, the solid content A stored in the storage 61 is introduced into the cylinder 63 through the injection hole 62. At this time, the second piston 66 is moved forward to close one side of the cylinder 63, it is preferable that the solid content introduced into the cylinder 63 is not configured to escape to the outside.

As shown in FIG. 9, the first piston 65 is moved forward in the cylinder 63 in the direction of the second piston 66 to compress the solids to extract oil from the solids. At this time, the oil extracted from the compressed solid content (B) exits the cylinder 63 through the deoiling hole (64).

As shown in FIG. 10, after all of the oil is extracted from the solids by pressing the first piston 65 and the second piston 66, the second piston 66 is moved backward to move the cylinder 63. One end is opened, and then the first piston 65 is moved forward to discharge the solids B from which oil is extracted to the outside of the cylinder 63.

And the oil extracted by the secondary through the compression and exited to the outside of the cylinder 63 is transferred to the process of frying the first dry food waste is joined to the fried oil is recycled.

As such, the food waste solids containing a certain ratio of oil through the first and second oil extraction processes are used as solid fuels or mixed with additives to increase calories.

On the other hand, in the third embodiment of the present invention, pork oil may be used as an auxiliary material added to increase calories in the food waste solids containing the oil at a predetermined ratio. That is, food waste-oil dough is prepared by mixing the food waste solids and the pork oil extracted from the processed pig residue after the first and second oil extraction process (S34). And the food waste-oil dough thus prepared is compressed to form a solid fuel of the pallet structure (S36).

Here, the process of preparing food waste-oil dough (S34) and the process of producing a solid fuel of the pellet structure by pressing the same (S36) is the same as the first embodiment described above.

In addition, in the third embodiment of the present invention, the sludge dried as an auxiliary material added to increase calories in the food waste solids containing a certain ratio of oil may be used. That is, after the sludge generated during the treatment of waste water is first dried by steam in a dryer (S38), the food waste solids are mixed by mixing the food waste solids with respect to the first dried sludge and at the same time, food waste-sludge Form a mixture (S40). The food waste-sludge mixture is compressed to form a solid fuel having a pallet structure (S42).

Here, the dryer for primary drying the sludge is the same as the configuration of the dryer for drying the food waste as described above. And the first step of drying the sludge (S38), the step of forming a food waste-sludge mixture (S40) and the process of forming a solid fuel of the pellet structure (S42) is the same as the second embodiment described above It is done.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.

One; Hopper 2; Moisture Remover
3; Mesh separator 4; Centrifuge
5; Temporary storage 6; Oil extractor
10; Drum 20; jacket
30; Shaft 40; disk

Claims (8)

delete delete Indirectly heating food waste with steam in a dryer to produce dry food waste from which moisture has been removed;
Injecting dry food waste by heating the oil to a high temperature capable of vapor evaporation;
Agitating the dried food waste put into the heated oil with a rotating stirrer to decompose it into small particles, and frying with heated oil to evaporate the water contained in the dried food waste into steam;
Extracting the oil contained by compressing the solid content of the food waste from which water is evaporated;
Preparing a solid fuel using the solid extracted oil;
Including,
The dryer is fixed to the drum and the outer periphery of the shaft, which is installed in the transverse direction at the center of the drum and the pipe structure so that the steam is injected into the drum, and the steam is injected therein A plurality of disks communicated with the inside of the shaft to cover the outer surface of the drum, the jacket to form a space between the outer circumference of the drum so that the steam can be injected, the moisture evaporated from the food waste heated indirectly by the steam Solid fuel production method using a food waste, characterized in that it comprises an intake fan for suction to the outside of the drum. The method according to claim 3, wherein before the oil is extracted by squeezing the solids of the food waste having evaporated water,
Filtering the solids of the food waste from which water has evaporated through a screen of a network structure;
Separating only oil from the solids and oil filtered by the screen by centrifugation;
Collecting solids not filtered out by the screen and solids separated from oil by the centrifugal separation method in a temporary storage;
Solid fuel production method using food waste, characterized in that it further comprises. According to claim 3, wherein the solids of the food waste water is evaporated is compressed by the oil extractor containing the extracted oil,
The oil extractor,
A storage unit in which water is evaporated and the solid content is received, and a through hole for penetrating the solid content is formed at a lower side thereof;
A cylinder communicating with the lower side of the storage through the injection hole and having an empty space formed in a longitudinal direction therein;
Deoiling hole formed to penetrate at one end of the cylinder so that the oil separated from the solid content can escape to the outside of the cylinder;
A first piston that moves backward in the cylinder to open the input hole and moves forward to squeeze the solids;
A second piston for moving forward to one end of the cylinder to support the first piston for compressing the solids, and for opening the one end of the cylinder so that the compressed solids can escape to the outside;
Solid fuel production method using food waste, characterized in that comprising a. According to any one of claims 3 to 5, wherein the step of producing a solid fuel using the solid extracted oil,
Preparing a food waste-oil dough by mixing the solid extracted oil and the pork oil extracted from the processed pork residue;
Compressing the food waste-oil dough to form a solid fuel having a pallet structure;
Solid fuel manufacturing method using food waste, characterized in that comprising a. According to any one of claims 3 to 5, wherein the step of producing a solid fuel using the solid extracted oil,
Firstly drying the sludge generated during the treatment of the waste water with steam in the dryer;
Mixing the oil-derived food waste solids with respect to the first dried sludge to form a food waste-sludge mixture while secondaryly drying the sludge;
Compressing the food waste-sludge mixture to form a solid fuel having a pallet structure;
Solid fuel manufacturing method using food waste, characterized in that comprising a. The disk of the dryer according to any one of claims 3 to 5,
A method for manufacturing solid fuel using food waste, characterized in that two thin plates forming a conical structure are opposed to each other so as to form a space into which steam is injected, and the shaft penetrates a central portion thereof.

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