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Title:
DRYING AND CARBONIZING SYSTEM FOR TREATING ORGANIC AND WASTE
Document Type and Number:
WIPO Patent Application WO/2006/104298
Kind Code:
A1
Abstract:
Disclosed herein is a drying and carbonizing system for treating organic and waste matter. The system includes a drying furnace (3) which is connected to a screw conveyor (2), with a connection pipe (31) coupled to the drying furnace (3), and both a support (32) and a plate (33) placed in the drying furnace and provided on an outer surface of a communicating pipe (6). The system further includes a carbonizing furnace (4) which communicates with the drying furnace and has a discharge pipe (41) coupled to the carbonizing furnace (4), and a combustion furnace (5) which communicates with the carbonizing furnace. The combustion furnace has a primary combustion chamber (51) connected to the discharge pipe (41), and a secondary combustion chamber (52) connected to the connection pipe (31). The system further includes the communicating pipe (6) which is coupled both to the combustion furnace and to a cyclone (7) and axially passes through the drying furnace and the carbonizing furnace.

Inventors:
KIM CHANG JUN (KR)
Application Number:
PCT/KR2005/002259
Publication Date:
October 05, 2006
Filing Date:
July 14, 2005
Export Citation:
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Assignee:
GREEN TECHNOLOGY ENGINEERING C (KR)
KIM CHANG JUN (KR)
International Classes:
B09B3/00; F23G5/00; F23G5/027; F23G5/16; F23G5/20; F23M20/00; (IPC1-7): F23G5/00
Foreign References:
KR20040083231A2004-10-01
JP2001288473A2001-10-16
JPH10330760A1998-12-15
Attorney, Agent or Firm:
Yun, Young Han (Hiberas Bldg D 1062, Gyesan4-don, Gyeyang-gu Incheon 407-784, KR)
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Claims:
Claims
1. A drying and carbonizing system for treating organic and waste matter, including a screw conveyor carrying organic matter input through a hopper, a rotary kiln drying furnace, a rotary kiln carbonizing furnace and a combustion furnace, wherein the drying and carbonizing system comprises: a drying furnace connected to the screw conveyor, with a connection pipe coupled to both ends of the drying furnace; a carbonizing furnace communicating with the drying furnace, with a discharge pipe coupled to both ends of the carbonizing furnace , and a carbide storage tank provided below an end of the carbonizing furnace; a combustion furnace communicating with the carbonizing furnace, with an ash container provided on a lower end of the combustion furnace, the combustion furnace comprising: a primary combustion chamber connected to the discharge pipe of the carbonizing furnace; and a secondary combustion chamber connected to the connection pipe of the drying furnace; and a communicating pipe coupled at a first end thereof to the combustion furnace and coupled at a second end thereof to a cyclone, the communicating pipe axially passing through the drying furnace and the carbonizing furnace, with both a support and a plate provided on an outer surface of the communicating pipe such that the support and the plate are placed in the drying furnace. [Fig. 1] 10 11 Induction Bag filter Chimney fan stack VOC gas and steam Food waste Drying Carbonizing Combustion R.P.F input furnace furnace furnace Refined oil, B/C oil T] Carbide storage tank N) Discharge.
Description:
Description

DRYING AND CARBONIZING SYSTEM FOR TREATING

ORGANIC AND WASTE

Technical Field

[1] The present invention relates, in general, to a drying and carbonizing system for treating organic and waste matter, such as sludge, food waste and other domestic refuse and, more particularly, to a drying and carbonizing system which uses waste gas, generated during the process of drying and carbonizing the organic matter input through the hopper, as a fuel, and in which a combustion furnace is directly connected to a carbonizing furnace so that the high temperature heat generated from the combustion furnace passes through both the carbonizing furnace and a drying furnace, thus reducing fuel consumption, enhancing heat efficiency, and completely treating wastewater generated from organic matter. Background Art

[2] Generally, food waste has been treated by incineration or landfill disposal or has been transformed into feed or compost.

[3] In the case of incineration, there is a problem of the occurrence of odor and harmful substances such as dioxine.

[4] In the case of landfill disposal, odor is generated from food waste and, as well, such a landfill disposal method causes secondary pollution in which soil and water are polluted by leachate flowing from the food wastes. Due to this, ground subsidence may occur.

[5] Furthermore, because inhabitants strongly object to the construction of waste incineration plants and landfills due to the above-mentioned problems, it has been very difficult to secure sites for constructing waste incineration plants or landfills.

[6] Meanwhile, among food waste treatment methods, there are methods of reusing food waste as compost or feed after fermenting the food waste. As such, in the case that food waste is reused as compost or feed, first, a preliminary treatment process including a process of removing impurities from the food waste is executed. Subsequently, the food waste is fermented and is then used as compost or feed for domestic animals.

[7] Here, solid of the food waste is fermented and reused as compost or feed, but water flowing from the food waste during every treatment stage may cause secondary pollution.

[8] Furthermore, during a landfill disposal treatment or incinerating treatment process in an initial stage, many problems arise having a negative influence on the en-

vironment. In addition, valuable food resources have been squandered. [9] Particularly, food waste includes 80% or more water and has perishable organic materials. Therefore, if food waste is buried in the ground, odor occurs due to nitrogen and sulfur compounds, and vermin propagate. In addition, due to the occurrence of highly concentrated leachate, excessive expenses for treatment are incurred. Moreover, if food waste is treated by typical incineration equipment, incomplete combustion results, so that various harmful materials may be emitted. Disclosure of Invention

Technical Problem

[10] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a drying and carbonizing system which has a structure capable of treating organic matter, such as sludge or food waste, and waste matter, such as waste wood or waste vinyl, through a simple treatment process, and in which fuel is used only at an initial ignition stage and during a temperature increasing time, but gas and steam occurring when drying and carbonizing organic and waste matters are used as fuel after that time and, as well, any kind of inexpensive fuel can be used as fuel, thus being highly economical in this age of high oil prices.

[11] Another object of the present invention is to provide a drying and carbonizing system for treating organic and waste matter in which high temperature is maintained during the treatment process, thus perfectly treating organic hazardous gas and odor generated from organic matter when drying and carbonizing the organic matter.

[12]

Technical Solution

[13] In order to accomplish the above objects, the present invention provides a drying and carbonizing system for treating organic and waste matter, having a screw conveyor carrying organic matter input through a hopper, a rotary kiln drying furnace, a rotary kiln carbonizing furnace and a combustion furnace, wherein the drying and carbonizing system includes: a drying furnace connected to the screw conveyor, with a connection pipe coupled to both ends of the drying furnace and connected to a secondary combustion chamber, and both a support and a plate placed in the drying furnace and provided on an outer surface of a communicating pipe; a carbonizing furnace communicating with the drying furnace, with a discharge pipe coupled to both ends of the carbonizing furnace and connected to a primary combustion chamber, and a carbide storage tank provided below an end of the carbonizing furnace; a combustion furnace communicating with the carbonizing furnace, with an ash container provided on a lower end of the combustion furnace, the combustion furnace having the primary

combustion chamber connected to the discharge pipe of the carbonizing furnace, and the secondary combustion chamber connected to the connection pipe of the drying furnace; and the communicating pipe coupled at a first end thereof to the combustion furnace and coupled at a second end thereof to a cyclone, the communicating pipe axially passing through the drying furnace and the carbonizing furnace.

Advantageous Effects

[14] In the present invention, a drying and carbonizing system has a structure capable of treating organic matter, such as sludge or food waste, and waste matter, such as waste wood or waste vinyl, through a simple treatment process. Furthermore, fuel is used only at an initial ignition stage and during a temperature increasing time, but gas and steam occurring when drying and carbonizing organic and waste matter are used as fuel after that time. As well, any kind of inexpensive fuel can be used as fuel. Accordingly, the present invention is economical. Furthermore, because a high temperature is maintained during the treatment process, the present invention can completely neutralize organic hazardous gas and odors generated from organic matter when drying and carbonizing the organic matter, thus being environmentally friendly. Moreover, the present invention can ensure the stability and reliability of output matter, and can be used in a variety of industrial fields. Brief Description of the Drawings

[15] FIG. 1 is a view showing the construction of a drying and carbonizing system according to the present invention;

[16] FIG. 2 is a block diagram showing a procedure of using the drying and carbonizing system according to the present invention;

[17] FIG. 3 is a perspective view showing a drying furnace of the drying and carbonizing system according to the present invention; and

[18] FIG. 4 is a sectional view of the drying furnace of the drying and carbonizing system according to the present invention. Best Mode for Carrying Out the Invention

[19] Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

[20] The present invention provides a drying and carbonizing system which has a screw conveyor carrying organic matter input through a hopper, a rotary kiln drying furnace, a rotary kiln carbonizing furnace and a combustion furnace. In detail, as shown in the drawings, the drying and carbonizing system of the present invention includes a drying furnace 3 which is connected to a screw conveyor 2. A connection pipe 31 is coupled to both ends of the drying furnace 3 and is connected to a secondary combustion chamber 52, and both a support 32 and a plate 33 are placed in the drying furnace 3

and provided on an outer surface of a communicating pipe 6. The drying and carbonizing system further includes a carbonizing furnace 4 which communicates with the drying furnace 3. A discharge pipe 41 is coupled to both ends of the carbonizing furnace 4 and connected to a primary combustion chamber 51, and a carbide storage tank 42 is provided below an end of the carbonizing furnace 4. The drying and carbonizing system further includes a combustion furnace 5 which communicates with the carbonizing furnace 4, with an ash container 54 provided on a lower end of the combustion furnace 5. The combustion furnace 5 includes the primary combustion chamber 51 which is connected to the discharge pipe 41 of the carbonizing furnace 4, and the secondary combustion chamber 52 which is connected to the connection pipe 31 of the drying furnace 3. The drying and carbonizing system further includes the communicating pipe 6 which is coupled at a first end thereof to the combustion furnace 5 and coupled at a second end thereof to a cyclone 7. The communicating pipe 6 axially passes through the drying furnace 3 and the carbonizing furnace 4.

[21] The drying furnace 3 is coupled at both ends thereof to the connection pipe 31, which is connected to the secondary combustion chamber 52 of the combustion furnace 5, so that hazardous gas and steam, occurring when drying organic matter, are drawn into the combustion furnace 5.

[22] Furthermore, at least one support 32 is mounted to the outer surface of the communicating pipe 6, which axially passes through the drying furnace 3. The plate 33 is fastened to an end of the support 32. Both the support 32 and the plate 33 are placed in the drying furnace 3.

[23] Here, the plate 33 is constructed to be in close contact with an inner surface of the drying furnace 3 so as to scrape organic matter residue stuck to the inner surface of the drying furnace 3.

[24] The carbonizing furnace 4 is coupled at both ends thereof to the discharge pipe 41 which is connected to the primary combustion chamber 51 of the combustion furnace 5, such that gas occurring when carbonizing organic matter, which is drawn into the carbonizing furnace 4 after being dried in the drying furnace 3, is send into the combustion furnace 5.

[25] The carbide storage tank 42 is provided below the end of the carbonizing furnace 4 so that carbide, which is incompletely carbonized through a process of carbonizing the organic matter, is stored in the carbide storage tank 42.

[26] The combustion furnace 5 consists of the primary combustion chamber 51 and the secondary combustion chamber 52 which are connected to each other. A fuel supply screw conveyor 53 is mounted to the primary combustion chamber 51.

[27] Furthermore, the ash container 54 is mounted to the lower end of the primary combustion chamber 51 so as to receive impurities such as ash arising from incomplete

combustion.

[28] The present invention having the above-mentioned structure can treat organic matter, such as sludge or food waste, through a drying and carbonizing process and, as well, can treat waste matter, such as waste construction materials or waste vinyl, through the same drying and carbonizing process.

[29] In the drawings, the reference numeral 8 is a cooling tower, 9 is a bag filter, 10 is an induction fan, and 11 is a chimney stack.

[30] The operation and effect of the present invention having the above-mentioned structure will be described herein below.

[31] Organic matter, drawn into the drying furnace 3 by the hopper 1 and the screw conveyor 2, are dried in the drying furnace 3. At this time, organic hazardous gas and steam generated by the drying process are drawn into the combustion furnace 5 through the connection pipe 31. The organic matter, dried in the drying furnace 3, is carried into the carbonizing furnace 4 and carbonized in the carbonizing furnace 4. Gas occurring when carbonizing the organic matter is drawn into the combustion furnace 5 through the discharge pipe 41.

[32] The combustion furnace 5 uses a fuel, such as an R.P.F (recycled plastic fuel) or refined oil, at an initial ignition stage, but the combustion furnace 5 uses gas and steam, which are drawn from the drying furnace 3 and the carbonizing furnace 4 into the combustion furnace 5, as a fuel after the initial ignition stage.

[33] As such, the present invention uses fuel only when igniting the combustion furnace

5 and only during a temperature increasing time, thus reducing fuel consumption, thereby minimizing fuel expenses.

[34] Furthermore, because hazardous gas and steam occurring when drying and carbonizing organic matter are used as fuel in the primary and secondary combustion chambers 51 and 52 of the combustion furnace 5, environmental pollution is prevented and, as well, energy can be efficiently used.

[35] Moreover, high heat, generated by burning gas and steam in the primary and secondary combustion chambers 51 and 52, is discharged through the communicating pipe 6 which axially passes through the carbonizing furnace 4. Thus, the high heat is transferred from the communicating pipe 6 to the carbonizing furnace 4. As a result, solids of the organic matter, carried after being dried, may be carbonized by the high heat to be discharged through the communicating pipe 6. Therefore, the present invention is able to minimize the consumption of fuel for carbonizing the organic matter in the carbonizing furnace.

[36] In addition, because the combustion furnace 5 is directly connected to the end of the carbonizing furnace 4, heat generated in the combustion furnace 5 can be directly transferred to the carbonizing furnace 4 and the drying furnace 3, thus increasing heat

efficiency.

[37] As well, because the communicating pipe 6 axially passes through the drying furnace 3, organic matter can be dried in the drying furnace 3 by high heat to be discharged through the communicating pipe 6 in the same manner as that described for the carbonizing furnace 4.

[38]

Industrial Applicability

[39] As describe above, the present invention provides a drying and carbonizing system which has a structure capable of treating organic matter, such as sludge or food waste, and waste matter, such as waste wood or waste vinyl, through a simple treatment process. Furthermore, fuel is used only at an initial ignition stage and during a temperature increasing time, but gas and steam occurring when drying and carbonizing organic and waste matter are used as fuel after that time. As well, any kind of inexpensive fuel can be used as a fuel. Accordingly, the present invention is economical. Furthermore, because high temperature is maintained during the treatment process, the present invention can completely neutralize organic hazardous gas and odors generated from organic matter when drying and carbonizing the organic matter, thus being environmentally-friendly. Moreover, the present invention can ensure the stability and reliability of output matter, and can be used in a variety of industrial fields.