KR101314519B1 - Drying arrangement of food garbage - Google Patents

Abstract

PURPOSE: A food sludge drying machine is provided to evenly supply steam heat to food sludge and to supply air heated appropriately for removing water in the food sludge to a dry drum. CONSTITUTION: A food sludge drying machine comprises a dry drum (10); a sludge stirrer (20); a steam supplier (30); an air supplier (40); and a vapor outlet (50). The dry drum comprises a food sludge accommodation part (14) and a steam accommodation part (16) arranged on the outer wall of the food sludge accommodation part. The sludge accommodation part and the steam accommodation part are formed in a cylinder shape having a mutuality concentric circle. The sludge stirrer is rotatably equipped in the sludge accommodation part. The air supplier comprises an air supply pipe (42) of which the part of the pipe is combined in a double pipe structure with a steam pipe (32), and an air compressor (44) that supplies air of high pressure to the air supply pipe. A branch pipe (43) is formed at an end of the air supply pipe and inserted at a lower surface of the sludge accommodation part. The vapor outlet comprises a vapor exhaust pipe (52) of which the end is inserted to the sludge accommodation part and a vacuum pump (54) connected to the vapor exhaust pipe.

Description

Drying Arrangement of Food Garbage

The present invention relates to a food sludge drying apparatus, and more particularly, to a food sludge drying apparatus capable of improving drying efficiency by allowing high temperature and high pressure air to be injected into a drying drum which removes water from food sludge by steam heat and stirring. It is about.

As a conventional method of food sludge treatment, landfill or ocean dumping is a treatment method that is gradually being avoided as a problem causing secondary environmental pollution. In particular, Korea's dumping of food sludge has been banned since 2013 when the London Convention, an international ocean dumping convention, entered into force.

As an alternative to landfill or ocean dumping methods, there is a food sludge treatment method using microorganisms, but the method is in progress in commercialization due to the lack of technology development. At present, food sludge is applied with hot steam to remove moisture, and then the residue is recycled to compost or the like.

However, the technology has a problem that the operating cost of the drying apparatus is increased due to the fuel consumption for steam production. Korean Patent No. 10-1082508 (Registration Date: 2011.11.04.) Has been disclosed as a prior art for reducing the operation cost as described above, and FIG. 1 is a schematic diagram showing an implementation state of the prior art.

Referring to FIG. 1, the prior art includes a first drying drum 1 provided horizontally and a second drying drum 2 provided in an inclined state at one end of the first drying drum 1. The food sludge introduced through the hopper 3 of the first drying drum 1 is transported by the screw 4 and mixed with the superheated steam sprayed through the nozzle 5, thereby reducing preheating time.

However, the prior art has to absorb the heat of the saturated steam for the water evaporation of food sludge in the second drying drum (2), but to form a jacket (6) of a complicated shape to prevent the moisture of the saturated steam is mixed. Therefore, there is a disadvantage in that the manufacturing of the second drying drum (2) is cumbersome. In addition, since the preheating process and the water removal process are performed by the first drying drum 1 and the second drying drum 2, a wide installation site is required, thereby increasing the construction cost.

KR 10-1082508 B1 2011.11.04.

The present invention has been made to solve the problems of the prior art, the problem to be solved in the present invention is to provide a food sludge drying apparatus that can be evenly transferred steam heat to the food sludge.

In addition, an object of the present invention is to provide a food sludge drying apparatus that is easy to manufacture a drying drum and can supply the air heated at an optimal temperature for removing water from food sludge to the drying drum.

The food sludge drying apparatus of the present invention for solving the above problems consists of a sludge accommodating part for accommodating food sludge and a steam accommodating part formed on the outside of the sludge accommodating part, and the sludge accommodating part and the steam accommodating part have a cylindrical concentric circle. Dry drum formed into; A sludge stirrer rotatably provided in the sludge accommodating part and having a steam flow hole formed therein; A steam supply unit including a steam pipe for supplying steam to the steam accommodating part and the steam flow hole, a steam generator connected to the steam pipe, and a boiler for providing heat to the steam generator; Part of the air supply pipe coupled to the steam pipe and the double pipe structure and the air compressor for supplying high-pressure air to the air supply pipe, the end of the air supply pipe is formed with a branch pipe is inserted into the lower surface of the sludge receiving portion A fixed air supply unit; And a steam discharge part having one end of the steam discharge pipe connected to the sludge accommodating part and a vacuum pump connected to the steam discharge pipe.

In addition, the drying drum of the present invention, the sludge inlet for food sludge inlet is formed on the upper side, the sludge transport means for transporting the dried food sludge to the outside is formed on the lower side, the steam supply unit on both sides and up and down , Characterized in that a plurality of pipe fasteners are formed for fixing the pipe of the air supply and the steam discharge.

In addition, the double pipe of the present invention is made of a plurality of unit double pipe, characterized in that the unit double pipe is detachably coupled to each other in order to control the temperature of the air flowing into the drying drum.

According to the present invention, as the air supply pipe is inserted into the lower part of the sludge accommodating part of the drying drum, the water evaporation of the food sludge is performed quickly, thereby improving the drying efficiency of the drying apparatus.

In addition, according to the present invention, the drying drum is easy to manufacture the drying drum is provided in the form in which the tubular fixture is formed on the upper and lower sides of the sludge accommodating portion while the sludge accommodating portion and the steam accommodating portion maintain the concentric structure by the support piece. In this way, it is possible to reduce the manufacturing cost of the drying apparatus.

In addition, according to the present invention, as the double pipe is made of a detachable unit double pipe, it is possible to quickly remove the water from the food sludge, thereby improving the drying efficiency of the drying apparatus.

1 is a schematic diagram showing an embodiment of a food sludge drying apparatus according to the prior art.
Figure 2 is a schematic diagram showing an embodiment of the food sludge drying apparatus according to the present invention.
Figure 3 is a perspective view showing the main portion of the food sludge drying apparatus according to the present invention.
Figure 4 is a perspective view showing a drying drum of the food sludge drying apparatus according to the present invention.
5 is a schematic view showing an embodiment of the air supply unit according to the present invention.
Figure 6 is a front view showing a double pipe of the food sludge drying apparatus according to the present invention.

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

Figure 2 is a schematic diagram showing an embodiment of the food sludge drying apparatus according to the present invention. Referring to FIG. 2, the present invention includes a drying drum 10, a sludge stirrer 20, a steam supply unit 30, an air supply unit 40, and a steam discharge unit 50, and includes a sludge stirrer 20. By stirring the food sludge by the stirring action and the scattering action of the air supply unit 40 is characterized in that the drying time and drying cost can be reduced.

Figure 3 is a perspective view showing the main portion of the food sludge drying apparatus according to the present invention. 2 and 3, the drying drum 10 is installed and fixed on the ground in a state in which the cylindrical body is inverted, the sludge inlet 11 for food sludge input is formed on the top. In addition, the lower side of the drying drum 10 is formed with a sludge conveying means 12 for discharging the dried food sludge, the pipe for inserting and fixing the steam pipe 32 of the steam supply unit 30 on both sides The fixture 13 is formed. In addition, a plurality of pipe fixtures 13 ′ for fixing the air supply pipe 42 of the air supply part 40 and the vapor discharge pipe 52 of the vapor discharge part 50 also in the vertical direction of the drying drum 10. , 13 ") is formed.

The interior of the drying drum 10 is a place where the heating and stirring of the food sludge is made, for this purpose is composed of a sludge accommodating portion 14 and a steam accommodating portion 16 having a concentric cross section.

Food sludge is accommodated in the sludge accommodating part 14, and steam supplied by the steam supply part 30 flows into the steam accommodating part 16. In addition, the sludge accommodating part 14 is provided with a sludge stirrer 20 at the center so that steam heat can be evenly spread to the food sludge through stirring.

The drying drum 10 is made of a metal material with excellent thermal conductivity so that steam heat diffusion to the food sludge is effectively performed, but the outside of the drying drum 10 is preferably wrapped with a heat insulating material in order to prevent heat loss.

Figure 4 is a perspective view showing a drying drum of the food sludge drying apparatus according to the present invention. 2 and 4, a plurality of supports 15 are formed in the internal space of the steam accommodating part 16 so that the sludge accommodating part 14 is maintained at a predetermined distance, and the support is used for the flow of steam. Ensure that the disturbance is formed in a form that is minimal. As an example, as shown in Figure 4, the support 15 is formed of a square plate, it may be formed in the form of heating in the steam flow direction.

The sludge agitator 20 is provided in the sludge accommodating portion 14 as described above to agitate the food sludge. To this end, both ends of the rotating shaft of the sludge stirrer 20 are supported at both ends of the drying drum 10, and one end thereof is geared or chain-coupled with the driving motor 21 in a state in which the drum is protruded to the outside of the drying drum 10. .

In addition, a stirring blade 23 in the form of a screw or disc is formed on the rotating shaft, and a steam flow hole 22 is formed inside the rotating shaft and the stirring blade 23. By supplying steam to the steam flow hole 22, the stirring blade 23 has become a high temperature to transfer heat evenly to the food sludge.

The steam supply unit 30 to heat the food sludge to remove the water contained in the food sludge evaporated, for this purpose consists of a steam pipe 32, steam generator 34 and a boiler.

The steam generator 34 receives steam from the boiler and heats the water contained therein to generate steam, and the generated steam 10 and the air supply unit to be described later through the steam pipe 32. It supplies to the air supply pipe 42 of 40).

The steam pipe 32 is composed of a first steam pipe 32a and a second steam pipe 32b branched from the steam generator 34. The first steam pipe (32a) is formed to supply steam to the drying drum 10, the steam is circulated by being connected to the steam accommodating portion (16) in the state inserted into both ends of the drying drum (10) do. Therefore, the high temperature steam heat is stably provided to the drying drum 10 to improve the drying efficiency of the food sludge drying apparatus. The second steam pipe (32b) is formed to heat the air flowing into the drying drum 10, a description thereof will be described later.

5 is a schematic diagram showing an embodiment of an air supply unit according to the present invention. 2 and 5, the air supply part 40 injects high pressure air into the lower side of the sludge accommodating part 14, so that the food sludge is scattered by the high pressure air. That is, by further activating the evaporation of water through the scattering of food sludge can improve the drying efficiency of the drying apparatus.

To this end, the air supply unit 40 supplies air of high pressure to the air supply pipe 42 and the air supply pipe 42 which are inserted into and connected to the pipe fixing tool 13 ′ formed on the lower surface of the sludge accommodating part 14. It consists of the compressor 44.

In this case, since the food sludge needs to be evenly scattered along the longitudinal direction of the drying drum 10, a branch pipe 43 corresponding to the pipe stop 13 'is formed at one end of the air supply pipe 42. .

6 is a front view showing a double pipe of the food sludge drying apparatus according to the present invention. When air at room temperature is injected into the drying drum 10, the drying efficiency of the food sludge drying apparatus may be lowered. Therefore, the air to be injected into the drying drum 10 needs to be raised above a predetermined temperature. To this end, a portion of the air supply pipe 42 is coupled to the second steam pipe 32b and the double pipe (A) structure, as shown in FIG. According to the structure, the air at room temperature passing through the double pipe (A) absorbs the heat of steam is injected into the drying drum 10 in a high temperature state.

The longer the length of the double pipe (A) can increase the temperature of the air, while the evaporation rate of the water increases as the temperature of the air increases, while the discharge rate of the water through the steam discharge unit 50 to be described later to decrease do.

Therefore, it is necessary to adjust the length of the double pipe (A) so that the air at a temperature at which the evaporation rate and the discharge rate of the moisture is optimally introduced into the drying drum 10 according to the scale of the drying drum 10. To this end, the double pipe (A) is to be made of a plurality of unit double pipe (a), each unit double pipe (a) to be detachable from each other so that the length of the double pipe (a) can be adjusted.

The steam discharge unit 50 serves to discharge the water evaporated from the food sludge by the stirring action and steam heat. To this end, the steam discharge unit 50 includes a steam discharge pipe 52 having a branch pipe 53 formed at one end thereof and a vacuum pump 54 connected to the steam discharge pipe 52. The branch pipe 53 is discharged by the vacuum pump 54 in a state in which the branch pipe 53 is inserted into the tube fixture (13 ") formed on the upper portion of the sludge receiving portion (14).

In general, the gas is difficult to discharge to the general pump due to the activation of the gas molecules as the temperature increases. Therefore, the vacuum pump 54 is operated to bring the upper space of the sludge accommodating portion 14 into a negative pressure state, so that the evaporated water is smoothly discharged through the distribution pipe. The discharged water is liquefied when passing through a condenser (not shown) connected to the vacuum pump 54, and purification is performed through subsequent processing such as pH adjustment.

According to the present invention, the food sludge of the sludge accommodating part 14 is caused by the steam heat provided from the steam supply part 30, the stirring action of the sludge agitator 20, and the high temperature and high pressure air provided from the air supply part 40. Moisture is quickly removed through the scattering action can improve the drying efficiency of the food sludge drying apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: drying drum
11: sludge inlet 12: sludge conveying means
13: Tube fixture 14: Sludge container
16: steam container
20: sludge agitator
22: steam flow hole
30: steam supply
32: steam piping 34: steam generator
36: boiler
40: air supply unit
42: air supply pipe 44: air compressor
50: steam outlet
52: steam discharge pipe 54: vacuum pump

Claims (3)

Sludge accommodating part 14 for receiving food sludge and a steam accommodating part 16 formed outside the sludge accommodating part 14, the sludge accommodating part 14 and the steam accommodating part 16 mutually A drying drum 10 formed in a cylindrical shape having concentric circles;
A sludge stirrer 20 rotatably provided in the sludge accommodating part 14 and having a steam flow hole 22 formed therein;
Provides heat to the steam pipe 32 for supplying steam to the steam accommodating part 16 and the steam flow hole 22, the steam generator 34 and the steam generator 34 connected to the steam pipe 32 Steam supply unit 30 made of a boiler 36;
A portion of the pipe is composed of an air supply pipe 42 coupled to the steam pipe 32 and the double pipe (A) structure and an air compressor 44 for supplying high pressure air to the air supply pipe 42, the air An end of the supply pipe 42 has an branch pipe 43 is formed air supply unit 40 is fixed to the lower surface of the sludge receiving portion 14; And
Food and beverage characterized in that consisting of; steam discharge pipe 52, one end of which is connected to the steam discharge pipe 52 is inserted into the sludge receiving portion 14 and the vacuum pump 54 connected to the steam discharge pipe 52; Sludge drying equipment.
The method of claim 1,
The drying drum 10,
Sludge inlet 11 for food sludge input is formed on the upper side, sludge conveying means 12 for transporting the dried food sludge to the outside is formed, the steam supply unit 30 on both sides and up and down Food sludge drying apparatus, characterized in that a plurality of pipe fixing fixtures (13, 13 ', 13 ") for fixing the pipe of the air supply unit 40 and the steam discharge unit (50) is formed.
The method of claim 1,
The double pipe (A),
Food sludge drying apparatus comprising a plurality of unit double pipe (a), the unit double pipe (a) is detachably coupled to each other in order to control the temperature of the air flowing into the drying drum (10).

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