KR20170006173A - System for reducing weight of organized sludge by fermentation and dry - Google Patents

Abstract

The present invention relates to a system for reducing the weight of waste, whereby organic waste is fermented, dried and processed into pellets. The system of the present invention comprises: a fermentation weight reduction device (200) which reduces the weight of organic waste via fermentation and drying; a pellet molding device (252) which forms pellets with a treated material discharged from the fermentation weight reduction device; and a dryer (254) which dries the pellets formed in the pellet molding device. The fermentation weight reduction device comprises: a fermentation chamber (10) which receives an organic waste; a stirring device (20) which includes a cylinder (22) which is installed vertically in the middle of the fermentation chamber and has open top and bottom ends, and a screw conveyor (24) which is installed inside the stirring cylinder, conveys the organic waste from the bottom to the top through the open bottom end, and discharges the organic waste through the open top end; a plurality of air supply holes (19) which introduce air into the fermentation chamber from the outside; a discharge opening (18) which is formed on one side of a lower part (16) of the fermentation chamber to discharge the treated organic waste; and a scrapper (40) which is installed inside the lower part of the fermentation chamber and rotates such that the organic waste on the periphery gathers to the center of the inside the fermentation chamber.

Description

[0001] The present invention relates to an organic waste fermentation system,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system for reducing weight of organic wastes, and more particularly, to an organic waste fermentation weight reduction apparatus capable of reducing the volume and weight of wastes through decomposition and drying of organic matter by fermentation, .

Organic wastes are collectively referred to as solids including water, animal wastes including food, wastewater sludge, and dehydrated cakes in which water is firstly removed from such wastes. These organic wastes may be disposed of or recycled through a certain treatment because they are substantially contaminated materials.

The organic wastes as described above contain substantially water and are decayed, so that a predetermined treatment must be carried out. Prior art for the treatment of such wastes has been proposed in Korean Patent Registration No. 10-1190186. According to this prior art, it is understood that the organic wastes are treated by fermenting and drying the wastes. However, in the treatment of organic wastes, it is a well-known principle to perform the drying treatment for decomposing organic matter and evaporating moisture by fermentation using microorganisms.

Therefore, in an apparatus for treating organic wastes, an important point is that it is the most efficient configuration for efficient fermentation and drying, and for such fermentation and drying. According to the above-described prior art, a plurality of impellers are configured to rotate around a central axis in order to stir waste in a fermenter. However, since organic wastes have a certain water content, they are substantially in the form of sludge. Therefore, a large load is required in the process of stirring using a plurality of impellers, and the impeller wear and damage due to contact with waste It is inevitably a problem.

According to the conventional structure as described above, since the plurality of impellers rotate in the horizontal direction, the stirring of the waste around the impeller can be easily proceeded, but the stirring in the up-and-down direction does not progress smoothly within the fermenter can not do it. In other words, since the waste in the upper part and the waste in the lower part can not be effectively mixed in the inside of the fermentation tank, the overall treatment efficiency is also somewhat problematic.

Korean Patent Registration No. 10-1350238 also discloses a weight reduction treatment apparatus using fermentation, but it is considered that the contents are not sufficiently agitated in the inside of the container, so that it is difficult to reduce the weight efficiently. Furthermore, in the prior art as described above, it can be said that certain limitations are pointed out to the efficient treatment of the treated product.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a fermentation and reduction system capable of maintaining the durability of a stirring device for fermentation and drying and improving fermentation and drying efficiency.

It is another object of the present invention to provide a system in which processing is completed most efficiently through filletting of a processed product.

In order to solve the above problems, an organic waste fermentation and reduction system according to the present invention comprises: a fermentation reduction device for reducing organic wastes through fermentation and drying; A fillet molding machine for filling the processed material discharged from the fermentation remainder into a fillet; And a dryer for drying the fillet produced by the fillet molding machine.

According to an embodiment of the fermentation retentive, a fermentation tank into which organic waste is introduced; An agitating cylinder provided in the vertical direction at the center of the fermentation tank and opened at upper and lower ends thereof and a screw conveyor for discharging organic wastes at the lower portion through the lower end portion provided inside the agitating cylinder upward and discharging the organic waste upward to the opened upper end portion Stirring device; A plurality of air supply holes for injecting outside air into the fermenter; A discharge port formed at a lower side of the fermentation tank and capable of discharging processed organic wastes to the outside; And a scraper installed inside the lower portion of the fermentation tank and collecting the organic waste outside the inside of the fermentation tank by the rotation into a central portion.

According to another embodiment of the present invention, the lower portion of the fermenter is formed in an inverted conical shape, the outlet is formed on one side of the lower portion, and the lower end of the stirring device extends to the lower portion of the fermenter .

According to another embodiment of the present invention, the scraper includes at least one frame close to the inner surface of the lower portion of the fermentation tank, and a plurality of scraping blades installed in the frame and transporting the organic waste to the inner center of the fermentation tank .

According to another embodiment of the present invention, the apparatus further comprises a high-on-line for supplying high-temperature air from the fermentation re- duction unit to the dryer, and further comprises a filter for removing moisture, A fan is installed.

According to another embodiment of the present invention, the fermentation and reduction device may further include a feed line for feeding high-temperature air, a heater provided on the feed line, and a blower for blowing air heated in the heater by the fermentation remainder .

Here, it is also preferable that a high-on-line La for supplying high-temperature air from the fermentation re- ductor to the dryer and a high-temperature connecting line branched from the high-online La and joining to the inflow line .

According to the present invention as described above, since the stirring device is provided in the vertical direction inside the fermenter, it can be seen that the stirring in the up and down direction is remarkably smooth in the inside of the fermenter. This means that the efficiency of the treatment by stirring is further improved.

In addition, according to the present invention, the load exerted by the screw conveyor installed in the agitating cylinder in the stirring process is remarkably reduced as compared with that of the conventional screw conveyor. In addition, the screw blades, which are connected in a streamlined manner as a whole, Can be improved.

According to the present invention, the contents of the outer portion of the agitating cylinder can be easily introduced into the central portion by the scrapers in the fermenter, thereby enabling efficient stirring as a whole. This means that efficient fermentation and reduction can be practically achieved in the fermentation tank.

Further, in the present invention, it can be seen that the complete finishing treatment of the waste can be accomplished very efficiently through the filleting apparatus. It will be appreciated that the overall system of the present invention is substantially maximizing efficiency in each part.

1 is an exemplary configuration diagram of a system of the present invention;
Fig. 2 is a sectional view showing an exemplary configuration of a fermentation reinsurer according to the present invention. Fig.
Figure 3 is a plan view of a fermentation recketer according to the present invention.
4 is a plan view showing a structure of a scraper of the present invention.
5 is an exemplary plan view showing a configuration for supplying air into the fermenter of the present invention.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. First, the overall configuration of the system of the present invention will be described based on FIG.

As shown in the figure, the fermentation and reduction system of the present invention comprises a sludge storage tank 100 storing sludge which can be referred to as organic waste, a fermentation re- duction unit 200 for receiving sludge from the sludge storage tank 100 ). The sludge storage tank 100 can be said to temporarily store the waste requiring treatment. The sludge of the storage tank 100 is supplied to the inside of the fermentation re- duction unit 200 through various conveying devices.

Next, the internal structure of the fermentation remainder 200 used in the present invention will be described with reference to FIG. 2 to FIG. The fermentation remainder 200 of the illustrated embodiment includes a fermentation tank 10 for treating organic waste and a stirring device 20 installed vertically inside the fermentation tank 10.

The fermentation tank 10 is provided so as to have a predetermined height in the vertical direction, and can be said to be a space where fermentation and drying of the organic waste supplied into the fermentation tank 10 can proceed. The fermentation tank 10 has an inlet 12 through which organic waste can be injected and an outlet 14 through which gas generated in the fermentation process and the like can be discharged to the outside. The sludge in the storage tank (100) flows through the inlet (12).

The stirring device 20 installed in the vertical direction inside the fermenter 10 is a device for efficiently contacting organic wastes and microorganisms and at the same time being able to make contact with the air supplied into the fermenter 10 It can be said that the agitation is performed for the waste. The stirring device 20 includes a stirring cylinder 22 provided in a vertical direction and having a predetermined diameter and a screw blade 24 installed inside the stirring cylinder 22 and conveying the organic waste upward from below, .

The agitating cylinder 22 is supported in the fermenter 10 with the upper and lower ends thereof being open. Further, the screw blade 24 is equipped with a spiral blade around the shaft so as to move the organic waste upward, and may be referred to as a screw conveyor. The screw blade 24 is rotated by a driving source (motor) M provided at the upper portion. For example, by receiving the rotational power from the driving source Ma through a speed reducer, And the desired amount of organic waste is transferred from the lower part to the upper part through the agitating cylinder 22.

Since the organic waste is moved upward in the stirring cylinder 22 and mixed with the screw blade 24 and discharged through the upper portion of the stirring cylinder 22, the organic waste flows outward in all directions, The organic waste in the cylinder 22 can be agitated more efficiently. By using the agitating cylinder 22 as described above, it is possible to carry out the process of distributing the organic waste at the bottom bottom to the outside while transferring the organic waste to the upper end, so that evenly stirring can be performed as a whole.

At the same time, the screw blade 24 inside the stirring cylinder 22 is rotated in the stirring cylinder 22 while agitating a sufficient amount of the organic waste, And the specification, it is expected that the adverse effect due to the load and abrasion occurring during stirring can be minimized.

It is preferable that the lower end of the screw blade 24 is designed to be positioned in the vicinity of the inverted conical lower portion 16 of the fermenter 10, as in the illustrated embodiment. That is, the lower portion 16 of the fermentation tank 10 is designed to have an inverted conical shape so that the organic waste can be concentrated, and the screw blade 24 can be stirred into the lower portion 16 of the fermentation tank 10 Thereby improving the stirring performance as much as possible. In the inverted conical lower side 16a of the fermentation tank 10, an outlet 18 through which the processed material can be discharged downward is provided in the inverted conical side surface 16a.

A plurality of air supply openings 19 are provided on one side of the fermentation tank 10 for fermentation and drying of the organic waste in the process of stirring the organic waste in the fermentation tank 10 as described above. The air supply port 19 is connected to an unillustrated blower or the like so that external air can be supplied into the fermentation tank 10 at a predetermined pressure. As shown in Fig. 5, nozzle portions 19a and 19b in which a plurality of nozzle holes are formed are provided in the air supply port 19. As shown in Fig.

In order to supply air as much as possible to the nozzles 19a and 19b, the nozzle portion 19a arranged in the x-axis direction and the nozzle portion 19b arranged in the y-axis direction are arranged in a lattice . ≪ / RTI > The nozzle portions 19a and 19b are provided so as to communicate with the air supply port 19 so that the air supplied from the air supply port 19 can be ejected through a nozzle hole formed in the outer side surface It would be natural. It is a matter of course that arranging the nozzle portions 19a and 19b in a lattice shape will enable air to be supplied over as wide a range as possible within the fermenter 10. [

It is preferable that the air supply port 19 and the nozzle portions 19a and 19b are formed in multiple stages having various heights in the inside of the fermenter and that a plurality of the air supply ports 19 and the nozzle portions 19a and 19b are also provided at the same height . The air supplied through the nozzle units 19a and 19b serves to further activate microbial activity in the fermentation tank 10 and to dry organic wastes.

That is, in the process of fermentation in the fermentation tank 10, microorganisms are further activated by the air supplied through the air supply port 19 and the nozzle units 19a and 19b. The fermentation by the microorganism means that the organic matter contained in the organic waste is substantially decomposed, and heat is generated in the decomposition process. For example, the heat generated in the decomposition process of the organic material causes internal Lt; RTI ID = 0.0 > 90 C. < / RTI > When air is supplied into the fermentation tank 10 as described above, the moisture of the organic waste is discharged to the outlet 14 as well.

When the fermentation process proceeds, the weight and volume of the fermentation tank 10 are significantly reduced after a certain period of time due to the decomposition of organic substances in the fermentation tank 10 and the removal of moisture in organic wastes, that is, the decrease of the water content. For example, when compared with the initial charge, the weight or volume is reduced to 70% or more, so that a sufficient weight reduction can be achieved.

A scraper 40 is installed inside the lower portion 16 of the fermentation tank 10 in order to more efficiently concentrate the organic waste in the central portion during the fermentation process in the fermentation tank 10. Such a scraper 40 can be said to have a function of scraping the organic waste located in the outer portion of the inner lower portion of the fermentation tank 10 to the central portion thereof. That is, the scraper 40 functions to scrape down or collect the waste attached to the outer side of the bottom of the fermenter 10 or the lower side of the side of the fermenter.

As can be seen from FIG. 3, the frame 42 has a straight or cruciform shape and is provided so as to approach the inner surface of the inverted conical lower portion 16 of the fermentation tank 10, And a plurality of scraping blades 44 to be installed. A plurality of scraping blades 44 are installed on the frame 42 such that the scrapping blades 44 are inclined to guide the organic waste to the central portion of the fermentation tank 10 in accordance with the rotation of the frame 42.

In the illustrated embodiment, the frame 42 is formed in a cross shape and includes a plurality of auxiliary frames 46 for supporting the frames 42 in a mutually connected relationship so as to be sufficiently supported by resistance during rotation . 2, the frame 42 of the scraper 40 has a V shape having a constant angle so as to be close to the inner surface of the inverted conical lower portion 16 when viewed from the front or side .

Accordingly, organic wastes located near the side wall of the fermentation tank 10 are collected at the central portion of the fermentation tank in accordance with the rotation of the scrapers 40. The organic waste collected at the central portion of the fermentation liquor 10 is moved upward by the screw blades 24 of the agitator 20. It is needless to say that such a scraper 40 can be variously changed in shape within a range in which the outer portion of the scraper 40 substantially in the lower portion inside the stirring device 20 can be collected in the central portion of the fermenter.

The scraper 40 is rotated by a scraper driving motor Mb provided outside the lower portion of the fermentation tank 10. For example, the deceleration mechanism that decelerates the rotational force in the scraper driving motor Mb. It is preferable that the rotating speed of the scraper 40 rotated by the scraper driving motor Mb is controlled to be a speed different from that of the screw blade 24 of the stirring device 20. [

When the above-mentioned process is performed for a predetermined time, the organic waste in the fermentation tank 10 is completely decomposed as the organic matter is completely decomposed, and the treatment is substantially completed. The processed material thus processed is discharged through the discharge port 18 provided on the lower surface 16 of the inverted conical shape of the fermentation tank 10.

The processed material discharged through the discharge port (18) is discharged to an appropriate place or position through the discharge mechanism (30). The discharge mechanism 30 includes a discharge pipe 32 formed of a cylindrical pipe and a screw conveyor 34 installed inside the discharge pipe 32. The screw conveyor 34 rotates using a drive motor 36 installed at one side of the discharge pipe 32 as a drive source. The screw conveyor 34 is decelerated at a desired speed and rotated, for example, through a speed reducer. In FIG. 1, reference numeral 50 denotes a ladder which can be climbed by the user for repair and management.

The processed material discharged from the fermentation remainder 200 is stored in the storage tank 218 using a conveyor or a screw conveyor 210 and then sent to the fillet molding machine 252 (pelletizer) in the storage tank 218 again. Here, the fillet molding machine 252 itself is widely used, and is a molding device for making a processed product having a predetermined humidity (for example, 30 to 35%) into a fillet.

The fillet produced by the fillet molding machine 252 is introduced into the dryer 254 through the conveyor 256. The fillet completely dried in the dryer 254 is discharged to the lower part. At this time, the powder or the like which is not completely filletted by the plate 260 disposed at the lower part of the dryer 254 falls downward, And the completely filletted material is collected in the fillet vessel 264 through the conveyor 262 or the like.

Since the dryer 254 is substantially for drying the fillet made in the fillet molding machine 252, it is preferable that air is supplied at a high temperature. Therefore, it is preferable that the high temperature air flowing out through the outlet 14 of the fermentation decanter 200 flows into the dryer 254 through the high on-line La. A bag filter 272 and a fan 274 for forming an air flow. If necessary, it is also preferable to provide a valve for discharging air to the outside from one point of the high online La.

As described above, it is preferable for the high-temperature air to be introduced into the fermentation re- duction unit 200 for the fermentation treatment. Therefore, high-temperature air must be introduced through the air supply port 19. In this embodiment, the input line Lb for supplying high-temperature air is connected to the air supply port 19. [ The blow line Lb is provided with a blower 276 for forming an air flow and a heater (not shown) for heating the air to be introduced. However, such a heater can be said to be used preliminarily.

On the downstream side of the high on-line La, a high-temperature connection line Lc is branched, and the high-temperature connection line Lc is connected to the input line Lb. According to this configuration, it can be seen that some of the high temperatures branched off from the high on-line La are supplied to the inside of the fermentation re- duction unit 200 through the high-temperature connecting line Lc and the input line Lb again. Therefore, it is sufficient that the heater that can be installed in the input line does not always need to be operated, and selectively operates only when the temperature inside the fermentation reductor 200 is low.

Since the fillet or powder obtained through the dryer 254 is substantially dried, the water content is very low, for example, about 10%. Here, the water content of the processed product in the fillet molding machine 252 is preferably about 20 to 25%, but the water content of the processed product fed from the actual fermentation product 200 is about 30 to 35%. Therefore, it can be seen that the processed water supplied from the fermentation re- ductor 200 has a somewhat higher humidity to fillet.

Therefore, in the present invention, powder or fillet in the powder container 266 or the fillet container 264 may be put into the fillet molding machine 252 again. The powder or fillet in the powder container 266 or the fillet container 264 is supplied to the reservoir 218 via the line Le3 through a transfer device (conveyor, screw conveyor, etc.) ) Can best be adjusted to the fillet forming.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It is natural that it should be interpreted on the basis of.

10 ..... fermentation tank
12 .... entrance
Exit 14 .....
16 ..... lower
18 ..... outlet
19 ..... Air supply port
20 ..... stirring device
22 ...... stirring cylinder
24 ..... Screw conveyor
30 ..... discharge device
32 ..... discharge pipe
34 ..... Screw conveyor
35 ..... outlet
36 ..... drive motor
38 ..... loading
40 ..... scraper
42 ..... frame
44 ..... Scraper blade
46 ..... Auxiliary frame
100 ..... Sludge storage tank
200 ..... fermentation reducing scale
252 .... Fillet molding machine
254 ..... dryer
256 ..... Conveyor
260 ..... Screening plate
264 ..... Fillet container
266 ..... powder container
272 ..... bag filter
274 ..... fans
La ..... online
Lb ..... input line
Lc ..... High temperature connection line

Claims (7)

A fermentation remainder which is reduced through fermentation and drying of organic waste;
A fillet molding machine for filling the processed material discharged from the fermentation remainder into a fillet; And
And a dryer for drying the fillet made in the fillet molding machine.
The fermentation apparatus according to claim 1,
A fermenter (10) into which organic waste is fed;
An agitating cylinder 22 installed vertically at the center of the fermentation tank and having upper and lower ends opened; and a screw 22 for transferring the lower organic waste through the lower end portion provided inside the agitating cylinder, A stirring device (20) having a conveyor (24);
A plurality of air supply holes 19 for injecting outside air into the fermenter;
An outlet 18 formed at one side of the lower portion 16 of the fermentation tank for discharging the processed organic waste to the outside; And
And a scraper (40) installed inside the lower part of the fermentation tank and collecting the organic waste outside the inside of the fermentation tank into a central part by rotation.

3. The apparatus according to claim 2, wherein the lower portion (16) of the fermenter is formed in an inverted conical shape and the outlet (18) is formed on one side (16a) of the lower portion (16) Extends to the lower portion (16) of the fermenter (18) proximate to the outlet (18).
4. The method of claim 3, wherein the scraper comprises: one or more frames proximate to an inner surface of a bottom portion (16) of the fermenter; and a plurality of scraping blades installed in the frame and transporting organic wastes to the inner center of the fermenter A system for organic waste fermentation loss.
5. The method according to any one of claims 1 to 4,
(La) for supplying high-temperature air from the fermentation remainder to the dryer, and a filter for removing moisture and a fan for forming an air flow are installed in the high-online La, Organic waste fermentation loss system.
5. The method according to any one of claims 1 to 4,
And a blower for blowing air heated by the heater to the fermentation remainder, and a blower for blowing air heated by the heater to the fermentation remainder.
The method according to claim 6,
(La) for supplying high-temperature air from the fermentation remainder to the dryer, and a high-temperature connection line branching from the high-on-line La and joining to the charging line, system.

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