WO2009035187A1

WO2009035187A1 - Waste's carbonization device

Info

Publication number: WO2009035187A1
Application number: PCT/KR2007/006268
Authority: WO
Inventors: Dong-Wan Lee
Original assignee: Dong-Wan Lee
Priority date: 2007-09-12
Filing date: 2007-12-05
Publication date: 2009-03-19
Also published as: KR100789703B1

Abstract

The present invention relates to an organic waste carbonization device, to which primarily dried and comminuted organic waste is fed to be heated in a hostile temperature environment, while being transferred at a high speed, and carbonized. The organic waste carbonization device comprises a barrel-shaped carbonization housing (20) fixed to or installed on a base (11), a transfer loader (30) which is rotatably supported on the carbonization housing (20) and driven by a drive transmission means (C1) such as a chain and a chain sprocket that are operatively connected to a driving motor (Ml), a supply housing (40) which is installed at the front end of the transfer loader (30) and has on its top a feed pipe (41) with a hopper (42), and a discharge housing (50) which is installed at the rear end of the transfer loader (30) and has on its bottom a downwardly extending discharge pipe (51). The present invention for producing fuel char by carbonizing organic waste is, therefore, keeps high thermal efficiency, which consequently reduces energy consumption. Moreover, it collects dry distilled gases produced in the process of carbonization and burns them again to suppress generation of offensive odors to minimum. Further, it achieves uniform and superior carbonization on the organic waste to get good quality fuel char.

Description

WASTE S CARBONIZATION DEVICE

Technical Field

[1] The present invention relates to a carbonization device for heating and carbonizing organic waste such as sewage sludge and food garbage at a fixed temperature, more specifically, to an organic waste carbonization device, to which primarily dried and comminuted organic waste is fed to be heated in a hostile temperature environment, while being transferred at a high speed, and carbonized. Background Art

[2] As treatment of organic waste such as sewage sludge and food garbage has come to the front as a social issue, a number of proposals have been made for efficient treatment of sewage sludge and food garbage.

[3] Among many treatment methods of organic waste materials, two methods are presently practiced the most: First, organic waste is reduced to its minimum volume and then landfilled or incinerated or gets thrown away into the ocean; and second, organic waste is processed (carbonized) to be recycled as char fuel.

[4] The former method where organic waste is landfilled or incinerated or gents thrown away into the ocean may cause many social problems. For example, the burying of organic waste in landfill areas not only contaminates the environment nearby the landfill areas, but also is gradually limited because of the scarcityof possible landfill areas. The conventional incineration of organic waste raises problems in that it consumes a considerable amount of fuel for incineration and releases vast amounts of pollutants (fumes and smoke) from the incineration process. Moreover, when organic waste is thrown away into the ocean, it obviously causes ocean pollution. As more nations enters into an agreement on the prohibition of the disposable of waste into the oceans, efficient treatment of vast amounts of organic waste discarded every single day is now urgently required more than ever.

[5] To meet such needs, methods of carbonizing organic waste to produce char fuel are under active study, and some of carbonization devices are already in market stages and used for carbonization of organic waste.

[6] carbonization devices currently being used are either direct heating or indirect heating carbonization devices. What happens in direct heating carbonization devices is that organic waste is fed into a directly heated rotary plate that rotates by a drive motor or the like, and then the organic waste is pushed outward from the rotary plate by the centrifugal force and carbonized by direct heat. Although the direct heating carbonization devices are useful for large-scale carbonization, their equipment is expensive, they have high maintenance costs, and there is high possibility that the carbonization by direct heating can cause a fire.

[7] Meanwhile, in case of indirect heating carbonization devices, organic waste is fed into a barrel-shaped transfer pipe where transfer screws are installed, so that the organic waste (e.g. food garbage) is transferred with the help of the transfer screwsand carbonized by externally applied heat to the transfer pipe. Although the indirect heating carbonization devices are relatively cheaper than the direct heating carbonization devices and reduce offensive odors, food garbage therein drags along the pipe or moves unsteadily so that organic waste cannot be carbonized uniformly withlow carbonization efficiency. When the incompletely carbonized organic waste is incinerated, a large amount of pollutants (e.g., dioxins) and offensive smell are produced in the process of incineration.

[8] Same proposed to recycle food garbage among organic waste to animal feed, but it requires a considerable amount of moneyto construct and install proper equipment and all kinds of subsidiary materials in the process, only creating the financial burden of expenses for facilities and maintenance thereof. Besides, many consumers are not much attracted to animal feed made of food garbage as main ingredient, which is another reason why this approach is not used as much as desired. Disclosure of Invention Technical Problem

[9] The present invention is therefore directed to resolve all kinds of problems found in the conventional organic waste treatment methods and suggest a novel organic waste carbonization device, in which primarily dried and comminuted organic waste being fed is completely dried with dry comminuting means before it is discharged such that good quality fuel char can be produced, dry distilled gases (including offensive odors) produced in the process of carbonization are burned again to create a pleasant environment for work place and nearby areas, and wasteheat generated in the process of carbonization is recovered or recycled, thereby improving thermal efficiency and cutting down maintenance costs. Technical Solution

[10] To achieve the technical object described above, there is provided an organic waste carbonization device, comprising: a barrel-shaped carbonization housing which is secured onto a base and has diaphragms to divide an interior space thereof, a transfer loader which is rotatably supported on the carbonization housing and driven by a drive transmission means such as a chain and a chain sprocket that are operatively connected to a driving motor, carbonization pipes installed in the transfer loader, and a supply housing and a discharge housing installed at the front and rear ends of the transfer loader, respectively. As such, organic waste that is fed into the supply housing goes through the carbonization pipes of the transfer loader and is discharged through the discharge housing.

Advantageous Effects

[11] The carbonization device proposed by the present invention heats, in a hostile temperature environment, the incoming organic waste (food garbage, sewage sludge, etc.)that is primarily dried with a separate means (dryer) and comminuted while transferring the organic waste. In this way, troublesome problems in the treatment of organic waste can be resolved by one effort.

[12] The carbonization device of the present invention is configured not only to recover waste heat generated in the process of carbonization, but also to discharge heat that is supplied into the carbonization housing through vertical convention with a diaphragm. Therefore, heat is retained inside the carbonization housing over a long period of timeto keep high thermal efficiency, which consequently reduces energy consumption. As the carbonization device of the present invention is configured to collect dry distilled gases produced in the process of carbonization and burn them with heat of fire generated in a burner, generation of offensive odors can be suppressed to minimum.

[13] In the carbonization device of the present invention, organic waste spreads by elongated concave scoops and transferred, at a fixed amount, into the respective high- temperature carbonization pipes of the rotary transfer loader. Inside the pipes, the organic waste runs along the wall and is continually turned over downward to achieve uniform carbonization on the organic waste and get good quality fuel char. Overall, the present invention is indeed advantageous to attain superior performance. Brief Description of the Drawings

[14] The above and other objects and features of the present invention will become apparent from the following description of the preferred embodiments given in conjunction with the accompanying drawings, in which:

[15] Fig. 1 is a front view showing a carbonization device in accordance with a preferred embodiment of the present invention; [16] Fig. 2 is a cross-sectional view showing the internal structure of a carbonization housing in accordance with the present invention;

[17] Fig. 3 is a perspective view of a transfer loader in accordance with the present inventi on;

[18] Fig. 4 is a cross-sectional view for explaining, as a reference, an example of how a carbonization housing, a transfer loader and a supply housing are assembled, in accordance with the present invention;

[19] Fig. 5 is a cross-sectional view for illustrating, as a reference, another embodiment of a feed pipe in accordance with the present invention;

[20] Fig. 6 is a cross-sectional view for explaining, as a reference, an example of how a carbonization housing, a transfer loader and a discharge housing are assembled, in accordance with the present invention; and

[21] Fig. 7 is a cross-sectional view for illustrating, as a reference, another embodiment of a discharge pipe in accordance with the present invention.

[22] D Numeral Description of Main Part of the Drawings D

[23] 10: carbonization device 11: base

[24] 20: barrel-shaped carbonization housing 21: exhaust duct

[25] 22: supply duct 30: transfer loader

[26] 31,31a: front, rear side support plate 32: hollow carbonization pipe

[27] 40: supply housing 41: feed pipe

[28] 44: feed tube 50: discharge housing

[29] 60: carbonization burner Ml: driving motor

[30] M2: supply motor S : feed screw

Mode for the Invention

[31] Fig. 1 shows a carbonization device 10 in accordance with a preferred embodiment of the present invention, and Fig. 2 is a cross-sectional view showing the internal structure of a carbonization housing 20 in accordance with the present invention. As shown, the present invention includes a barrel-shaped carbonization housing 20 fixed to or installed on a base 11, a transfer loader 30 which is rotatably supported on the carbonization housing 20 and driven by a drive transmission means Cl such as a chain and a chain sprocket that areoperatively connected to a driving motor Ml, a supply housing 40 which is installed at the front end of the transfer loader 30 and has on its top a feed pipe 41 with a hopper 42, a discharge housing 50 which is installed at the rear end of the transfer loader 30 and has on its bottom a downwardly extending discharge pipe 51, and a carbonization burner 60 having a blower 61. [32] The carbonization housing 20 has on its front and rear sides an exhaust duct 21 and a supply duct 22, in which one end of the supply duct 22 is connected to the front end of the blower 61 of the carbonization burner 60 so as to guide hot wind produced from combustion in the carbonization burner 60 towards the rear side of the carbonization housing 20,and one end of the exhaust duct 21 is connected to an external device (not shown, a dryer for example) so as to supply air (including heat) having gone through the carbonization housing 20 to the external device. Also, the discharge housing 50 is provided witha discharge duct 54 whose one end is connected to the blower 61 such that dry distilled gases (including offensive odors) produced in the process of carbonization are discharged to the blower 61 and combusted by heat of fire in the carbonization burner 60.

[33] As depicted in Fig. 2, the transfer loader 30 is installed, crossing the carbonization housing 20. Inside the carbonization housing 20, thereare plural diaphragms 23 encompassing the outer circumference of the transfer loader 30, and the diaphragms 23 are open alternately at their tops and bottoms, so the hot wind that is supplied into the carbonization housing 20 via the supply duct 22 is convected vertically until it is discharged through the exhaust duct 21 after traveling inside the carbonization housing 20 for a long period of time.

[34] The transfer loader 30 gradually becomes less inclined backward. Thus, food garbage that is fed to the transfer loader 30 naturally moves backward down the slope of the transfer loader 30.

[35] Preferably, the transferloader 30 is tilted at an angle of 1.5° to 3° because if it is tilted by a small angle, the target (food garbage) does not move smoothly; if it is tilted too much, a load is leaned to one side of the equipment, causing burden to all driving regions.

[36] Fig. 3 shows a perspective view of the transfer loader 30 in aαjordance with the present invention. Front and rear side support plates 31 and 31a are connected with a plurality of hollow carbonization pipes 32, and a plurality of reinforcements 320 are formed on the outer circumference of each of the carbonization pipes 32 to prevent the twist deformation of the carbonization pipes 32. Also, feed openings and discharge openings 33 and 33a are formed in contact areas between each of the carbonization pipes 32 and the front/rear support plates 31 and 31a, respectively, and semicircular (the configuration when seen from the front side and the lateral direction) elongated concave scoops 330 that protruded forward are formed on the circumference of the feed openings 33 inthe front side support plate 31. While rotating following the rotation drive of the transfer loader 30, the elongated concave scoops 330 each scoop a fixed amount of the target (food garbage) underneath them and feed it into the carbonation pipes 32.

[37] The elongated concave scoop 330 disposed at the feed opening 33 of the transfer loader 30 takes the form of a spiral protruded plate that gradually protrudes starting from the outside point of the feed opening 33 which is closest to the inner circumference of the front side support plate 31. This particular configuration of the elongated concave scoop 330 minimizes a load on it in the process of scooping organic waste and feeds a somewhat small amount of the organic waste into the respective carbonization pipes 32. That is, with this configuration, even if the efficiency in carbonizing work may be lowered to some extent, a load from the organic waste onto the elongated concave scoops 330 of the transfer load 30 during the operation of the transfer loader 30 is reduced, thereby improving durability of the equipment. And moreover, because a small amount of organic waste is fed and carbonized, superior carbonization effects are maintained.

[38] Fig. 4 is a cross-sectional view for explaining, as a reference, an example of how the carbonization housing 20, the transfer loader 30 and the supply housing 40 are assembled, in accordance with the present invention. As shown, a rotary drum 34 is coupled, through flanges 310 and 340, to the front end of the front side support plate 31 of the transfer loader 30, and a support drum 35 is coupled, through flanges 340 and 350, to the front end of the rotary drum 34, so the front end portion of the support drum 35 is positioned inside the supply housing 40. Further, an inwardly bent restriction plate 352 is formed at the front side of the support drum 35, and a through hole 351 is formed in an inside area of the restriction plate 352. The flanges 310 and 340 used to maintain a coupled state between the front side support plate 31 and the rotary drum 34 are inserted and supported rotatably in support grooves 240 ofa rotary support body 24 that is fixed to or installed in the carbonization housing 20. The flanges 340 and 350 used to maintain a coupled state between the rotary drum 34 and the support drum 35 are inserted and supported rotatably in support grooves 430 of a rotary support body 43that is fixed to or installed in the supply housing 40.

[39] A feed tube 44 having a feed opening 45 and a discharge opening 46 on the rear end is installed in the supply housing 40 in such a manner that the discharge opening 46 of the feed tube 44 is disposed at the front end of the transfer loader 30, going through the through hole 351 of the support drum 35, and that the feed pipe 41 is fitted into the feed opening 45 to deliver food garbage to the feed tube 44. A feed screw S, which is connected to a supply motor M2 with a drive transmission means C2 such as a chain and a chain sprocket, is installed in the feed tube 44.

[40] Here, forwardly and backwardly protruding guide plates 311, 341 and 351 are formed at the flanges 310, 340 and 350 of the front side support plate 31, the rotary drum 34 and the support drum 35, and high heat resistant Teflon blocks T are interposed in spaces betweenthe guide plates 311, 341 and 351, the front support plate 31, the rotary drum 34 and the support drum 36. Preferably, the outer diameter of each of the flanges 310, 340 and 350 is made smaller than the inner diameter of a support groove 430 of a rotation support body 43, and the interpined flanges 310, 340 and 350 are made to have a smaller thickness than the support groove 430 of the rotation support body 43. In so doing, thermal expansion of the transfer loader 30 in the axial direction caused by high heat can be accommodated or taken in by flexibility of the Teflon blocks T and marginal gap width of the support groove 430, and thermal expansion of the transfer loader 30 in the perpendicular direction to the axis can be accommodated or taken in by the difference of the outer diameter of the respective flanges 310, 340 and 350 and the inner diameter of the support groove 430.

[41] Fig. 5 shows another embodiment of the feed pipe 41 of the present invention. Upper and lower supply covers 47 and 47 a are hinged to the inside of the feed pipe 41 having the hopper 42, and the upper and lower supply covers 47 and 47a are open or closed independently under the control of upper and lower supply cylinders 48 and 48a that are fixed to or installed at the outside of the feed pipe 41.

[42] On one side of the lower supply cover 47a is a sensor (not shown) that senses a load of organic waste stacked up on the lower supply cover 47a and generates a sensor signal, if the load reaches a designated level. The lower supply cylinder 48a opens the lower supply cover 48a in response to a sensor signal from the sensor and operates reversibly, after a predetermined amount of time has lapsed (an amount of time to completely discharge the stacked organic waste), to close the lower supply cover 47a. The upper supply cylinder 48 operates in a manner opposite to the lower supply cylinder 48a, it also being constituted to open or close the upper supply cover 47.

[43] With the configuration of the feed pipe 41 discussed above, when the lower supply cover 44a is open the upper supply cover 47 remains closed, and when the lower supply cover 44a is closed the upper supply cover 47 is open. Therefore, despite a continuous supply of organic waste through the hopper 42, offensive odors that are generated inside the carbonization device 10 are not released to outside. Also, since oxygen is not supplied into the carbonization pipes 32 of the transfer loader 30, an oxygen-free state is maintained inside, thereby preventing the combustion of organic waste in the process of carbonization.

[44] Fig. 6 is a cross-sectional view for explaining, as a reference, an example of how the carbonization housing 20, the transfer loader 30 and the discharge housing 50 are assembled, in accordance with the present invention. A connection drum 36 is coupled, through flanges 310a and 360, to the rear end of the rear side support plate 31a of the transfer loader 30, and a support drum 37 is coupled, through flanges 360 and 370, to the rear end of the connection drum 36, so the rear end portion of the support drum 37 is positioned inside the discharge housing 50. The flanges 310aand 360 used to maintain a coupled state between the rear side support plate 31a and the connection drum 36 are inserted and supported rotatably in support grooves 240a of a rotary support body 24a that is fixed to or installed in the carbonization housing 20. The flanges 360 and 370 used to maintain a coupled state between the connection drum 36 and the support drum 37 are inserted and supported rotatably in support grooves 550 of a rotary support body 55 that is fixed to or installed in the discharge housing 50.

[45] Here, forwardly and backwardly protruding guide plates 31 Ia, 361 and 371 are formed at the flanges 310a, 360 and 370 of the rear side support plate 31a, the connection drum 36 and the support drum 37, and high heat resistant Teflon blocks T are interposed in spaces between the guide plates 31 Ia, 361 and 371, the rear support plate 31a, the connection drum 36 and the support drum 37. Preferably, the outer diameter of each of the flanges 310a, 360 and 370 is made smaller than the inner diameter of a support groove 550 of a rotation support body 55, and the interpined flanges 310a, 360 and 370 are made to have a smaller thickness than the support groove 550 of the rotation support body 55. In so doing, thermal expansion of the transfer loader 30 in the axial direction caused by high heat can be accommodated or taken in by flexibility of the Teflon blocks T and marginal gap width of the support groove 550, and thermal expansion of the transfer loader 30 in the perpendicular direction to the axis can be accommodated or taken in by the difference of the outer diameter of the respective flanges 310a, 360 and 370 and the inner diameter of the support groove 550.

[46] Fig. 7 shows another embodiment of the discharge pipe 51 of the present invention.

Upper and lower discharge covers 52 and 52a are hinged to the inside of the discharge pipe 51, and the upper and lower supply covers 52and 52a are open or closed independently under the control of upper and lower discharge cylinders 53 and 53a that are fixed to or installed at the outside of the discharge pipe 51. [47] One side of the lower discharge cover 52a is a sensor (not shown) that senses a load of organic waste stacked on the lower discharge cover 52a and generates a sensor signal, if the load reaches a designated level. The lower discharge cylinder 53aopens the lower discharge cover 52a in response to a sensor signal from the sensor and operates reversibly, after a predetermined amount of time has lapsed (an amount of time to completely discharge the stacked organic waste), to close the lower discharge cover 52a. The upper supply cylinder 53 operates in a manner opposite to the lower supply cylinder 53a, it also being constituted to open or close the upper discharge cover 52.

[48] With the configuration of the discharge pipe 51 discussed above, when the lower discharge cover 52a is open the upper discharge cover 52 remains closed, and when the lower discharge cover 52a is closed the upper discharge cover 52 is open. Therefore, despite a continuous discharge of organic waste, offensive odors that are generated inside the carbonization device 10 are not released to outside. Also, since oxygen is not supplied into the carbonization pipes 32 of the transferloader 30, an oxygen-free state is maintained inside, thereby preventing the combustion of organic waste in the process of carbonization.

[49] In the present invention with the configuration discussed above, when the driving motor Ml rotates and drives the transfer loader 30 and the supply motor M2 drives the feed screw S, hot wind generated by the carbonization burner 60 flows, by the blower, towards the rear side of the carbonization housing 20 and convects vertically, through the diaphragms 23, inside of the carbonization housing 20. After heating the carbonization pipes 32 to high temperature, the hot wind having passed through the inside of the carbonization housing 20 is then discharged through the exhaust duct 21 that is formed on the front side of the carbonization housing 20. At this time, since the end portion of the discharge duct 54 which is installed at the discharge housing 50 is connected to the blower 61, dry distilled gases generated in the process of carbonization are supplied to the blower 61 and the gases together with offensive odors are combusted. The exhaust duct 21 reclaims the hot wind having passed through the carbonization housing 20 and supplies it to the equipment (dryer) that needs it, thereby improving the thermal efficiency of the system.

[50] Having the equipment in operation mode, primarily dried and comminuted organic waste is fed through the hopper 42 which is provided to the feed pipe 41 of the carbonization device 10. The organic waste is then stacked up on the lower supply cover 47a installed inside the feed pipe 41 (at this time, the upper supply cover 47 is in open state). When a predetermined amount of the organic waste is stacked up on the lower supply cover 47a, the sensor (not shown) detects its weight and generates a sensor signal accordingly. In response to the sensor signal, the upper supply cylinder 48 operates to close the upper supply cover 47 and, at the same time, the lower supply cylinder 48a operates to open the lower supply cover 47a, such that the organic waste which isstacked up on the lower supply cover 47a is discharged downwardly and fed into the feed tube 44. When the supply of the organic waste is complete, the lower supply cylinder 48a operates to close the lower supply cover 47a, followed by the upper supply cylinder 48a operating to open the upper supply cover 48, so as to initiate the supply of the organic waste.

[51] The organic waste having fed into the feed tube 44 is transferred by the operation of the feed screw S driven by the supply motor M2 and falls down to the front end of the transfer loader 30 through the discharge opening 46. The restriction plate 352 at the front side of the support drum 35 prevents the organic waste having been dropped on the front end of the transfer loader 30 from flowing towards the front.

[52] In the process of the supply of organic waste described above, the upper and lower supply covers 47 and 47a installed inside of the feed pipe 41 are open or closed inter- operately, so the inside of the supply housing 40 is always blocked from outside by the upper and lower supply covers 47 and 47a for the supply of the organic waste. In this manner, the present invention blocks outside air (oxygen) from getting into the carbonization pipes 32 of the transfer loader 30 to prevent the combustion of the organic waste in the process of carbonization and keeps dry distilled gases (including offensive odors) generated from the carbonization process of organic waste from releasing to outside.

[53] Next, the elongated concave scoops 33 formed in the outer circumference of the feed openings 33 of the rotationally driving transfer loader 30 each scoop a suitable amount of the organic waste that has been dropped and stacked up on the front end of the transfer loader 30. As noted earlierin the previous embodiment, the transfer loader 30 gradually becomes less inclined backward (towards the discharge opening 33a), so the organic waste scooped by the elongated concave scoops 330 during the rotational drive of the transfer loader 30 is supplied into the carbonization pipes 32 through the feed opening 33. While being transferred inside the heated pipes 32, the organic waste runs along the wall and is continually turned over downward to achieve uniform carbonization on the organic waste and get good quality fuel char. Overall, uniform carbonization is achieved. [54] The carbonized organic waste by going through the carbonization pipes 32 is discharged to the discharge housing 50 through the discharge opening 33a. The carbonized organic waste gathered in the discharge housing 50 is then discharged through the discharge pipe51 to be stacked up on the lower discharge cover 52a which is installed inside the discharge pipe 51 (at this time, the upper discharge cover 52 is in open state). When a predetermined amount of the carbonized organic waste is stacked up on the lower discharge cover 52a, the sensor (not shown) detects its weight and generates a sensor signal aαjordingly. In response to the sensor signal, the upper dis- chargecylinder 53 operates to close the upper discharge cover 52and, at the same time, the lower discharge cylinder 53a operates to open the lower discharge cover 52a, such that the carbonized organic waste which is stacked up on the lower discharge cover 52a is discharged downwardly. When the discharge of the carbonized organic waste is complete, the lower discharge cylinder 53a operates to close the lower discharge cover 52a, followed by the upper discharge cylinder 53 operating to open the upper discharge cover 52, so as to initiate the discharge of the carbonized organic waste.

[55] In the process of the discharge of the carbonized organic waste described above, the upper and lower discharge covers 52 and 52a installed inside of the discharge pipe 51 are open or closed interoperately, so the inside of the discharge housing 50 is always blocked from outside by the upper and lower discharge covers 52and 52a for the discharge of the organic waste. In this manner, the present invention blocks outsideair (oxygen) from gettinginto the carbonization pipes 32 of the transferloader 30 to prevent the combustion of the organic waste in the process of carbonization and keeps dry distilled gases (including offensive odors) generated from the carbonization process of organic waste from releasing to outside.

[56] In the present invention with the configuration discussed above, when the driving motor Ml rotates and drives the transfer loader 30 and the supply motor M2 drives the feed screw S, hot wind generated by the carbonization burner 60 flows, by the blower, towards the rear side of the carbonization housing 20 and convects vertically, through the diaphragms 23, inside of the carbonization housing 20. After heating the carbonization pipes 32 to high temperature, the hot wind having passed through the inside of the carbonization housing 20 is then discharged through the exhaust duct 21 that is formed on the front side of the carbonization housing 20. At this time, since the end portion of the discharge duct 54which is installed at the discharge housing 50 is connected to the blower 61, dry distilled gases generated in the process of carbonization are supplied to the blower 61 and the gases together with offensive odors are combusted. The exhaust duct 21 reclaims the hot wind having passed through the carbonization housing 20 and supplies it to the equipment (dryer) that needs it, thereby improving the thermal efficiency of the system.

[57] Having the equipment in operation mode, primarily dried and comminuted organic waste is fed through the hopper 42 which is provided to the feed pipe 41 of the carbonization device 10. The organic waste is then stacked up on the lower supply cover 47a installed inside the feed pipe41 (at this time, the upper supply cover 47 isin open state). When a predetermined amount of the organic waste is stacked up on the lower supply cover 47a, the sensor (not shown) detects its weight and generates a sensor signal accordingly. In response to the sensor signal, the upper supply cylinder 48 operates to close the upper supply cover 47 and, at the same time, the lower supply cylinder 48a operates to open the lower supply cover 47a, such that the organic waste which is stacked up on the lower supply cover 47 a is discharged downwardly and fed into the feed tube44. When the supply of the organic waste is complete, the lower supply cylinder 48a operates to close the lower supply cover 47a, followed by the upper supply cylinder 48a operating to open the upper supply cover 48, so as to initiate the supply of the organic waste.

[58] The organic waste having fed into the feed tube44 is transferred by the operation of the feed screw S driven by the supply motor M2 and falls down to the front end of the transfer loader 30 through the discharge opening 46. The restriction plate 352 at the front side of the support drum 35 prevents the organic waste having been dropped on the front end of the transfer loader 30 from flowing towards the front.

[59] In the process of the supply of organic waste described above, the upper and lower supply covers 47 and 47a installed inside of the feed pipe 41 are open or closed inter- operately, so the inside of the supply housing 40 is always blocked from outside by the upper and lower supply covers 47 and 47a for the supply of the organic waste. In this manner, the present invention blocks outside air (oxygen) from getting into the carbonization pipes 32 of the transfer loader 30 to prevent the combustion of the organic waste in the process of carbonization and keeps dry distilled gases (including offensive odors) generated from the carbonization process of organic waste from releasing to outside.

[60] Next, the elongated concave scoops 33 formed in the outer circumference of the feed openings 33 of the rotationally driving transfer loader 30 each scoop a suitable amount of the organic waste that has been dropped and stacked up on the front end of the transfer loader 30. As noted earlier in the previous embodiment, the transfer loader 30 gradually becomes less inclined backward (towards the dischargeopening 33a), so the organic waste scooped by the elongated concave scoops 330 during the rotational drive of the transfer loader 30 is supplied into the carbonization pipes 32 through the feed opening 33. While being transferred inside the heated pipes 32, the organic waste runs along the wall and is continually turned over downward to achieve uniform carbonization on the organic waste and get good quality fuel char. Overall, uniform carbonization is achieved.

[61] The carbonized organic waste by going through the carbonization pipes 32 is discharged to the discharge housing 50 through the discharge opening 33a. The carbonized organic waste gathered in the discharge housing 50 is then discharged through the discharge pipe 51 to be stacked up on the lower discharge cover 52a which is installed inside the discharge pipe51 (at this time, the upper dischargecover 52 is in open state). When a predetermined amount of the carbonized organic waste is stacked up on the lower discharge cover 52a, the sensor (not shown) detects its weight and generates a sensor signal aαjordingly. In response to the sensor signal, the upper discharge cylinder 53 operates to close the upper discharge cover 52 and, at the same time, the lower discharge cylinder 53a operates to open the lower discharge cover 52a, such that the carbonized organic waste which is stacked up on the lower discharge cover 52a is discharged downwardly. When the discharge of the carbonized organic waste is complete, the lower discharge cylinder 53a operates to close the lower discharge cover 52a, followed by the upper discharge cylinder 53 operating to open the upper discharge cover 52, so as to initiate the discharge of the carbonized organic waste.

[62] In the process of the discharge of the carbonized organic waste described above, the upper and lower discharge covers 52 and 52a installed inside of the discharge pipe 51 are open or closed interoperately, so the inside of the discharge housing 50 is always blocked from outside by the upper and lowerdischarge covers 52 and 52a for the discharge of the organic waste. In this manner, the present invention blocks outside air (oxygen) from getting into the carbonization pipes 32 of the transfer loader 30 to prevent the combustion of the organic waste inthe process of carbonization and keeps dry distilled gases (including offensive odors) generated from the carbonization process of organic waste from releasing to outside.

[63] While the present invention has been described with respect to certain preferred embodiments, it will be apparent to those skilled in the art that various changes and modi- ficationsmay be made without departing from the scope of the invention as defined in the following claims.

Claims

[1] An organic waste carbonization device comprising a barrel-shaped carbonization housing (20) fixed to or installed on a base (11), a transfer loader (30) which is installed crossing the carbonization housing (20) and driven by a drive transmission means (C Imperatively connected to a driving motor (Ml), a supply housing (40) which is installed at the front end of the transfer loader (30) and has on its top a feed pipe (41) with a hopper (42), a discharge housing (50) which is installed at the rear end of the transfer loader (30) and has on its bottom a downwardly extending discharge pipe (51), and a carbonization burner (60) having a blower (61), wherein, the carbonization housing (20)has on its front and rear sides an exhaust duct (21) and a supply duct (22), in which one end of the supply duct (22)is connected to the front end of the blower (61) of the carbonization burner (60), one end of the exhaust duct (21) is connected to an external device such as a dryer, and a discharge duct (54) whose one end is connected to the blower (61) is installed at the discharge housing (50); and wherein, the transfer loader (30) has carbonization pipes (32) for transferring organic waste, the transfer loader (30) gradually becoming less inclined backward to let food garbage that is fed to the transfer loader (30) naturally move backward down the slope of the transfer loader (30).

[2] The carbonization device of claim 1, wherein the carbonization housing (20) has its inside plural diaphragms (23) encompassing the outer circumference of the transfer loader (30), the diaphragms (23) beingopen alternately at their tops and bottoms to allow the hot wind that is supplied into the carbonization housing (20) via the supply duct (22) to convect vertically while travelling inside the carbonization housing (20).

[3] The carbonization device of claim 1, wherein, as for the transfer loader (30), front and rear side support plates (31, 31a) are connected with a plurality of hollow carbonization pipes (32), openings (33, 33a) are formed in contact areas between each of the carbonization pipes (32) and the front/rear support plates (31, 31a), respectively, semicircular elongated concave scoops (330) that protruded forward are formed on the circumference of the openings (33) in the front side support plate (31), and a reinforcement (320) are formed on the outer circumference of each of the carbonization pipes (32).

[4] The carbonization device of claim 1, wherein a feed tube (44) having a feed opening (45) and a discharge opening (46) on the rear end is installed in the supply housing (40)in such a manner that the discharge opening (46) of the feed tube (44) is disposed at the front end of the transfer loader (30), going through a through hole (351) of asupport drum (35), and that the feed pipe (41) is fitted into the feed opening (45) to deliver food garbage to the feed tube (44), and wherein a feed screw (S) being connected to a supply motor (M2) with a drive transmission means (C2)is installed in the feed tube 44.

[5] The carbonization device of claim 1, wherein upper and lower supply covers (47,

47a) are hinged to the inside of the feed pipe (41), the upper and lower supply covers (47, 47 a) each being open or closed independently under the control of upper and lower supply cylinders (48, 48a) that are fixed to or installed at the outside of the feed pipe (41), a sensor being installed on one side of the lower supply cover (47a) to sense a load of organic waste stacked up on the lower supply cover (47a) and generating a sensor signal, if the load reaches a designated level, the lower supply cylinder (48a) opening the lower supply cover (48a) in response to a sensor signal from the sensor and operating reversibly, after a predetermined amount of time to completely discharge the stacked organic waste has lapsed to close the lower supply cover (47a), and the upper supply cylinder (48) operatingin a manner opposite to the lower supply cylinder (48a) and being constituted to open or close the upper supply cover (47); and wherein, upper and lower discharge covers (52, 52a) are hinged to the inside of the discharge pipe (51), the upper and lower supply covers (52, 52a) each beingopen or closed independently under the control of upper and lower discharge cylinders (53, 53a) that are fixed to or installed at the outside of the discharge pipe (51), a sensor being installed on one side of the lower discharge cover (52a) to sensea load of organic waste stacked on the lower discharge cover (52a) and generatinga sensor signal, if the load reaches a designated level, the lower discharge cylinder (53a) openingthe lower discharge cover 52a in response to a sensor signal from the sensor and operates reversibly, after a predetermined amount of time to completely discharge the stacked organic waste has lapsed, to close the lower discharge cover (52a), and the upper supply cylinder (53) operating in a manner opposite to the lower supply cylinder (53a) and being constituted to open or close the upper discharge cover (52).

[6] The carbonization device of claim 1 or claim 3, wherein a rotary drum (34) is coupled, through flanges (310, 340), to the front end of the front side support plate (31) of the transfer loader (30), a support drum (35) is coupled, through flanges (340, 350), to the front end of the rotary drum (34), and a through hole (351) is formed in an inside area of the restriction plate (352) that is formed at the front side of the support drum (35), and the flanges 310 and 340 used to maintain a coupled state between the front side support plate 31 and the rotary drum 34 being inserted and supported rotatably in support grooves (240) of a rotary support body (24) that is fixed to or installed in the carbonization housing (20), the flanges (340, 350) used to maintain a coupled state between the rotary drum (34) and the support drum (35) being inserted and supported rotatably in support grooves (430) of a rotary support body (43) that is fixed to or installed in the supply housing (40); and wherein, a connection drum (36)is coupled, through flanges (310a, 360), to the rear end of the rear side support plate (31a) of the transfer loader (30), and a support drum (37)is coupled, through flanges (360, 370), to the rear end of the connection drum (36) so as to position the rear end portion of the support drum (37) inside the discharge housing (50), the flanges (310a, 360) used to maintain a coupled state between the rear side support plate (31a) and the connection drum (36) being inserted and supported rotatably in support grooves (240a) of a rotary support body (24a) that is fixed to or installed in the carbonization housing (20), and the flanges (360, 370) used to maintain a coupled state between the connection drum (36) and the support drum (37) being inserted and supported rotatably in support grooves (550) of a rotary support body (55) that is fixed to or installed in the discharge housing (50). [7] The carbonization device of claim 6, wherein forwardly and backwardly protruding guide plates (311, 341, 351) are formed at the flanges (310, 340, 350) of the front side support plate (31), the rotary drum (34) and the support drum (35), and high heat resistant Teflonblocks T are interposed in spaces between the guide plates (311, 341, 351), the front support plate (31), the rotary drum (34) and the support drum (36), an outer diameter of each of the flanges (310, 340, 350) being smaller than the inner diameter of a support groove (430) of a rotation support body (43), and the interjoined flanges (310, 340, 350) having a smaller thickness than the support groove (430)of the rotation support body (43); and wherein, forwardly and backwardly protruding guide plates (311a, 361, 371) are formed at the flanges (310a, 360, 370) of the rear side support plate (31a), the connection drum (36) and the support drum (37), and high heat resistant Teflon blocks T are interposed in spaces between the guide plates (311a, 361, 371), the rear support plate (31a), the connection drum (36) and the support drum (37), an outer diameter of each of the flanges (310a, 360, 370) being smaller than an inner diameter of a support groove (550) of a rotation support body 55, and the interjoined flanges (310a, 360, 370) havinga smaller thickness than the support groove (550) of the rotation support body (55).