KR100557676B1 - Method for carbonizing organic waste and the apparatus therefor - Google Patents

Abstract

The present invention relates to an organic waste carbonization method and apparatus, and more particularly, to slowly dry organic waste in an indirect slow-drying method in a low temperature and high temperature drying furnace to sufficiently dry the organic waste to the inside of the organic waste, followed by external air in a carbonization furnace. Carbonization is carried out by indirect heating method while maintaining the airtightness and the carbonized high temperature carbide is cooled and discharged to the outside to produce high quality carbides with greatly reduced volume and weight. Exhaust gas and carbonized dry gas in low temperature and high temperature drying process and carbonization process are burned in a combustion furnace to reduce odor, and recycle high temperature combustion gas as carbon source, high temperature drying furnace, and low temperature drying furnace heat source. Organic waste that can maximize energy efficiency The present invention relates to a carbonization method and apparatus therefor.

Organic waste, carbonization, low temperature drying, high temperature drying, combustion, heat exchange, air purification

Description

Organic waste carbonization method and apparatus therefor {Method for carbonizing organic waste and the apparatus therefor}

1 is a block diagram showing an organic waste carbonization method according to the present invention.

2 is an overall configuration diagram of an organic waste carbonization apparatus according to the present invention.

3 is a cross-sectional view showing the configuration of a drying furnace installed in an organic waste carbonization apparatus according to the present invention.

4 is a cross-sectional view showing the configuration of a carbonization furnace and a carbide discharge facility installed in an organic waste carbonization apparatus according to the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a cross-sectional view showing another embodiment of the organic waste carbonization apparatus according to the present invention.

<Explanation of symbols for main parts of drawing>

1: organic waste storage and input process 2: drying process

2a: low temperature drying process 2b: high temperature drying process

3: carbonization process 3a: carbide cooling and discharge process

4: brackish separation process 5: combustion process

6: heat exchange process 7: air purification and discharge process

9: organic waste carbonization device 10: organic waste storage facility

20: drying furnace 30: carbonization furnace

40; Separation Facility 50: Combustion Furnace

60: heat exchanger 70: air purification

80: low temperature drying furnace 90: high temperature drying furnace

100: carbide discharge equipment

The present invention relates to an organic waste carbonization method and apparatus, and more particularly, to slowly dry organic waste in an indirect slow-drying method in a low temperature and high temperature drying furnace to sufficiently dry the organic waste to the inside of the organic waste, followed by external air in a carbonization furnace. Carbonization is carried out by indirect heating method while maintaining the airtightness and the carbonized high temperature carbide is cooled and discharged to the outside to produce high quality carbides with greatly reduced volume and weight. Exhaust gas and carbonized dry gas in low temperature and high temperature drying process and carbonization process are burned in a combustion furnace to reduce odor, and recycle high temperature combustion gas as carbon source, high temperature drying furnace, and low temperature drying furnace heat source. Organic waste that can maximize energy efficiency The present invention relates to a carbonization method and apparatus therefor.

In general, organic wastes such as sewage and wastewater sludge and food waste are easily rotted due to high water content. Therefore, when they are buried in the ground, they can cause serious environmental pollution such as soil pollution and groundwater pollution by leachate. In addition, when these organic wastes are incinerated, not only air pollutants such as dioxins may be generated, but a large amount of fuel must be consumed to incinerate organic wastes having high water content.

In order to solve various problems caused by landfilling and incineration of organic wastes, a method of carbonizing organic wastes and recycling them as carbides has been devised.In the carbonization of such organic wastes, organic wastes contain a large amount of water. When the carbonization treatment is carried out in an intact state, as with incineration treatment, a lot of fuel is still consumed, and organic waste having a high water content is burned without being properly carbonized, thereby generating dioxins as incineration treatment. There was this.

Therefore, in order to solve the problems caused by the organic waste carbonization treatment method, the organic waste is contacted with hot hot air before being introduced into the carbonization furnace or dried in a short time (about 30 to 50 minutes) with a water content of 10% or less in a direct flame method. The method of carbonizing dried organic waste in a carbonization furnace has been conceived. While this carbonization method has the advantage of saving thermal efficiency and processing time, it does not sufficiently dry the organic waste inside by rapid surface drying. If the organic wastes that are not sufficiently dried inside are carbonized in the carbonization furnace, the flammable components of the organic wastes are incinerated, which causes incineration and cause odors. It contained a problem that was required.

In order to solve the problems of the conventional organic waste carbonization method as described above, the applicant has filed for the organic waste carbonization method known as Patent Publication No. 2005-96673 (published date 2005.10.06.).

However, although the organic waste carbonization method pre- filed by the applicant has been improved from the prior art, some organic wastes are burned in the carbonization process to generate odor or recycle due to insufficient drying to the inside of the organic waste in the drying process of the organic waste. Not only is the yield of high-quality carbides low, but the carbonized carbides are discharged as they are at the same temperature as the temperature in the carbonization furnace, so the packaging work cannot be carried out immediately. There was a problem in that the efficiency of the work is deteriorated, such as leaving the air in the air and waiting for cooling and then proceeding with packing of carbides.

The present invention has been made to solve the above problems, the present invention is to slowly dry the organic waste in an indirect slow drying method in a low temperature and high temperature drying furnace to sufficiently dry the organic waste to the inside of the organic waste to maintain airtightness with the outside air By indirect heating in one carbonization furnace, the carbonized hot carbide is discharged to the outside in a cooled state to produce high quality carbides with greatly reduced volume and weight. The exhaust gas and carbonized dry gas produced during the high temperature drying process and the carbonization process can be burned in the combustion furnace to reduce odor, and the high temperature combustion gas can be recycled as a heat source for carbonization, high temperature drying and low temperature drying furnace. To maximize energy efficiency Zero.

The organic waste carbonization method according to the present invention for solving the above technical problem is an organic waste storage and input step of quantitatively introducing the organic waste stored in the storage hopper into the drying furnace by a quantitative supply means, and the organic waste storage and input step Drying process in which the organic waste quantified into the drying furnace is indirectly heated and dried by the heat of combustion gas or auxiliary burner supplied from the combustion furnace in the drying furnace, and the organic waste quantified into the carbonization furnace through the drying process is externally The carbonization process indirectly heated and carbonized by the heat of the combustion gas or auxiliary burner supplied from the combustion furnace while maintaining airtightness with air, and the water condensation device and the separator of water separated from the moisture contained in the exhaust gas generated in the drying process. The water separation process and the water separation process to remove the The exhaust gas from which water is removed and the carbonized dry gas generated in the carbonization process are burned in a combustion furnace by a burner to generate combustion gas of 850 to 950 ° C., and then the combustion gas is sequentially supplied to a carbonization furnace and a drying furnace. A heat exchange process in which a combustion gas used as a heat source of a carbonization furnace and a drying furnace through the combustion process is introduced into a heat exchanger to exchange heat with air introduced from the outside, and then supply heated external air to the drying furnace; In the air purifying and discharging process of purifying the combustion gas passed through the heat exchange process by the air purifying apparatus and then discharging it to the air, the drying process is carried out by storing the organic waste quantified into the low temperature drying furnace through the organic waste storage and input process. Between the combustion gas supplied from the combustion furnace or the heat of the auxiliary burner in the low temperature drying furnace A low temperature drying process for drying the water content of organic waste to 65 ± 3% or less by heating it to a temperature of 150 to 200 ° C. for 1.5 hours, and supplying the organic waste that has undergone the low temperature drying process from a combustion furnace in a high temperature drying furnace. Indirect heating by the heat of combustion gas or auxiliary burner and drying for 1.5 hours at a temperature of 200 ~ 350 ℃ to dry the water content of organic waste to 35 ± 3% or less, the carbonization process is the low temperature drying process And 550 to 650 ° C by the heat of the combustion gas or auxiliary burner supplied from the combustion furnace while keeping the organic waste dried to a water content of 35 ± 3% or less through a high temperature drying process in a carbonization furnace while maintaining airtightness with external air. Indirect heating to temperature to carbonize, and the carbonization process is followed by a carbonization process, the carbide is reduced in volume and weight is equipped with a cooling device Screen is characterized in that the cooling and discharge step of discharging the carbide in a state cooled by the discharge facilities added.

In addition, the organic waste carbonization apparatus according to the present invention comprises an organic waste storage facility comprising a storage hopper for storing various organic wastes, a quantitative input means for quantitatively supplying the stored organic wastes to a drying furnace, and the organic waste storage facility quantitatively supplied from the organic waste storage facility. Combustion of organic waste quantitatively supplied by means of a quantitative input means connected to the exhaust end of the drying furnace and the drying furnace for drying the organic waste with the combustion gas or auxiliary burner heat supplied from the combustion furnace, while keeping the airtight airtight. Carbonization furnace that carbonizes with the heat of the combustion gas supplied from the furnace or the heat of the auxiliary burner, and a water separation unit for separating the moisture from the exhaust gas generated in the drying process of the drying furnace and then supplying the exhaust gas from which the moisture is removed to the combustion furnace. And exhaust gas and the coal supplied from the water separation unit. Combustion furnace which sequentially supplies the high temperature combustion gas obtained by burning carbonized dry gas generated in the carbonization process of the furnace through the inside of the carbonization furnace and into the drying furnace, and the combustion gas passing through the interior of the carbonization furnace and the drying furnace. A heat exchange facility for heating the air introduced from the outside by heat exchange with the air and blowing the heated external air to the inside of the drying furnace, and an air purifier for filtering the combustion gas cooled through the heat exchange facility and then discharging it into the atmosphere In the organic waste carbonization apparatus consisting of a facility, the drying furnace is installed at the top to dry the organic waste by the low-temperature combustion gas, and the lower portion to dry the low-temperature dried organic waste by the high-temperature combustion gas It consists of a high temperature drying furnace to be installed, the inside of the jacket of the low temperature drying furnace, both ends An input end and an discharge end connected to the organic waste storage facility are respectively provided, and roller support parts supported by the support rollers are fixedly installed on the outer circumferential surfaces of both ends and the central part, respectively, and a driving gear part is fixed to one outer peripheral surface of the roller support part installed in the center part. A drive motor for interlocking driving gears is provided by a low-speed drying slow rotating drum in which a feeding screw plate is fixed in a spiral shape on an inner circumferential side of the input end side, and a plurality of stirring blades are fixed in a spiral shape on the entire inner circumferential surface. Each rotatably installed by the drive, inside the input end side of the slow drying drum for low temperature drying, a crushing double screw for crushing the organic waste quantitatively supplied from the organic waste storage facility is rotatably installed by the drive motor, Both ends of the inside of the jacket of the high temperature drying furnace An injection end and an discharge end respectively connected to the discharge end of the slow-driving drum for low temperature drying are respectively provided, and roller support portions supported by the support rollers are fixedly installed on the outer peripheral surfaces of both ends and the central portion, respectively. The drive gear part is fixedly installed on one side of the outer circumference, and the screw plate for feeding is fixed on the inner circumference of the input end side in a spiral manner, and a slow rotating drum for high temperature drying is provided with a plurality of agitating blades spirally fixed on the entire inner circumference. It is rotatably installed by a drive motor for interlocking with fishermen, and a crushing double screw for crushing the organic waste conveyed from the discharge end of the low-temperature drying slow rotating drum is driven inside the high-speed drying slow rotating drum. It is rotatably installed by a motor, and inside the jacket of the carbonization furnace The cross-sectional shape is formed into a reverse heart shape, an organic waste inlet and a dry gas exhaust hole are formed on one side, a carbide outlet is formed on the other side, and a pair of screw conveyors are rotatable by a driving motor on both sides. The carbide tube is fixedly installed, and at the rear end of the carbonization furnace, a carbide inlet connected to the carbide outlet of the carbide tube is formed at one upper portion, and a carbide outlet for discharging the cooled carbide is formed at the other lower portion, The screw conveyor is configured to be connected to the carbide discharge facility consisting of a carbide discharge inner cylinder rotatably installed by the drive motor and the carbide cooling outer cylinder is installed to surround the outer side of the carbide discharge inner cylinder.

In addition, another embodiment of the organic waste carbonization apparatus according to the present invention is characterized in that the brush made of a metal material is fixed to each end of the screw blades provided in the pair of screw conveyors installed in the carbonization pipe. .

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 6 to achieve the above object.

1 is a block diagram showing an organic waste carbonization method according to the present invention, Figure 2 is an overall configuration diagram of an organic waste carbonization apparatus according to the present invention, Figure 3 is a drying furnace installed in the organic waste carbonization apparatus according to the present invention 4 is a cross-sectional view showing the configuration of a carbonization furnace and a carbide discharge apparatus installed in the organic waste carbonization apparatus according to the present invention, FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, and FIG. Is a cross-sectional view showing another embodiment of the organic waste carbonization apparatus.

Organic waste carbonization method according to the present invention is organic waste storage and input step (1), drying step (2), carbonization step (3), carbide cooling and discharge step (3a), water separation as shown in FIG. It consists of a process (4), a combustion process (5), a heat exchange process (6), an air purification and discharge process (7).

In the organic waste storage and input process (1), various organic wastes, such as sewage and wastewater sludge or food waste, are stored in a storage hopper, and the organic wastes are quantitatively inputted to a drying furnace using a quantitative supply means such as a screw conveyor. Done.

The drying step (2) consists of a low temperature drying step (2a) and a high temperature drying step (2b), in the low temperature drying step (2a) through the organic waste storage and input step (1), the organic waste quantitatively introduced into the low temperature drying furnace Is indirectly heated by the combustion gas supplied from the combustion furnace or the auxiliary burner in a low temperature drying furnace and dried at a temperature of 150 to 200 ° C. for 1.5 hours to dry the water content of the organic waste to 65 ± 3% or less.

At this time, the lower limit of the temperature range of the low temperature drying process (2a) is maintained at 150 ℃ or more because the drying time is less than 150 ℃ takes too much drying time and the work efficiency is lowered, the upper limit of the temperature range 200 The reason for keeping it below ℃ is to allow the organic waste having a high water content to be sufficiently dried to the inside by allowing it to be naturally connected to the high temperature drying process (2b) after the low temperature drying process (2a) without a sudden temperature change. to be.

In addition, the reason for limiting the drying time of the low temperature drying process 2a to 1.5 hours is to dry as slowly as possible while maintaining the above temperature conditions so that the organic waste having a high water content can be sufficiently dried to the inside thereof. For sake.

In the high temperature drying process (2b), the organic waste that has passed through the low temperature drying process (2a) is indirectly heated by the heat of the combustion gas or the auxiliary burner supplied from the combustion furnace in the high temperature drying furnace and dried at a temperature of 200 to 350 ° C. for 1.5 hours. The water content of organic wastes will be dried below 35 ± 3%.

At this time, the reason for maintaining the lower limit of the temperature range of the high temperature drying process (2b) to 200 ℃ or more is that the low-temperature drying process (2a) and high temperature drying process (2b) can be naturally connected without a sudden temperature change, high organic content The reason is that the waste can be sufficiently dried to the inside, and the reason why the upper limit of the temperature range is kept below 350 ° C is to reduce the odor occurrence by heating below the volatilization temperature of the odor component.

In addition, the reason for limiting the drying time of the high temperature drying step 2b to 1.5 hours is to dry as slowly as possible while maintaining the temperature condition as described above, so that the organic waste having a high water content is evenly distributed to the inside without volatilizing dust. This is to allow sufficient drying.

As such, the organic waste is classified into low temperature and high temperature drying processes (2a) and (2b), respectively, and is slowly dried over 3 hours at low and high temperature conditions. Thus, only the surface of the organic waste is dried or scattered dust due to the conventional rapid drying. It can be sufficiently dried to the inside of the organic waste without generating volatilization or odor.

The carbonization process (3) is carried out by the heat of the combustion gas or auxiliary burner supplied from the combustion furnace in the state of maintaining the airtightness of the organic waste quantitatively injected into the carbonization furnace through the drying process (2) in the carbonization furnace in the carbonization furnace. In the carbonization process (3), in this carbonization process (3), organic wastes dried at a water content of 35 ± 3% or less through the low temperature drying process (2a) and the high temperature drying process (2b) are treated with external air in a carbonization furnace. The carbon is indirectly heated to a temperature of 550 to 650 ° C. by the heat of the combustion gas or the auxiliary burner supplied from the combustion furnace while maintaining the airtightness.

When the organic waste dried at a moisture content of 35 ± 3% is carbonized at a temperature of 550 to 650 ° C., more hydrogen and carbon dioxide (carbon) are produced by vaporized water vapor than the conventional drying method of rapidly drying the water content below 10%. Since carbon dioxide is generated and the activity of carbonized dry gas is improved, the carbonized dry gas can be burned in a combustion furnace to suppress odor generation, and can be recycled as a heat source of carbonization furnace, high temperature drying furnace and low temperature drying furnace. It is possible to greatly improve the energy efficiency.

In the carbide cooling and discharging step 3a following the carbonization step 3, a high temperature carbide whose volume and weight are reduced through the carbonization step 3 is cooled by a carbonization discharge facility equipped with a cooling device. To be discharged.

As such, the carbide discharged at a high temperature equal to the temperature in the carbonization furnace through the carbonization process (3) can be cooled and discharged to a temperature that is easy to handle by a carbonization discharge facility equipped with a cooling device, thereby Since it is possible to carry out packing work on the carbides discharged at the same time, the work time can be drastically shortened and the work efficiency can be greatly improved.

In the water separation process (4), the water contained in the exhaust gas generated in the drying process (2), that is, the low temperature drying process (2a) and the high temperature drying process (2b) is removed by using a water condenser and a separator. After the moisture is removed exhaust gas is sent to the combustion furnace.

In the combustion process (5), the exhaust gas from which water is removed through the water separation process (4) and the carbonized dry gas generated in the carbonization process (3) are burned in a combustion furnace with a burner to burn 850 to 950 ° C. After generating the gas, the combustion gas is sequentially supplied to the carbonization furnace, the high temperature drying furnace, and the low temperature drying furnace.

At this time, the reason why the temperature range of the combustion process (5) is maintained at 850 to 950 ° C. is that when the temperature is less than 850 ° C., the exhaust gas and carbonized dry gas are incompletely burned to generate odors or generate air pollutants. This is because, when the temperature exceeds 950 ° C, the heat loss is increased and the energy efficiency is significantly lowered.

In this way, the combustion gas generated in the combustion furnace is sequentially passed through a carbonization furnace requiring a heat source of 550 to 650 ° C., and a high temperature drying furnace requiring a heat source of 200 to 350 ° C. and a low temperature drying furnace requiring a heat source of 150 to 200 ° C. By allowing it to flow naturally according to the cooling process, it is possible to make the best use of the waste heat of the combustion gas, thereby significantly reducing the fuel used.

In the heat exchange process (6) through the combustion process (5), the combustion gas used as a heat source of the carbonization furnace and the drying furnace is introduced into the heat exchanger to exchange heat with the air introduced from the outside, and then the heated external air to the drying furnace. Will be supplied.

Even after using the combustion gas generated in the combustion furnace as a heat source for the carbonization furnace, the high temperature drying furnace, and the low temperature drying furnace, the combustion gas is introduced into the heat exchanger again to exchange heat with the air introduced from the outside to waste heat remaining in the combustion gas. It is possible to recover as much as possible, and by supplying the external air heated by the heat exchange with the combustion gas to the drying furnace it is possible to significantly reduce the fuel required for the drying process.

In the air purifying and discharging step 7, the combustion gas passed through the heat exchange step 6 is purified by an air purifying device and then discharged into the atmosphere.

Hereinafter, the organic waste carbonization apparatus using the organic waste carbonization method according to the present invention configured as described above is as follows.

Organic waste carbonization apparatus according to the present invention is largely organic waste storage facility 10, drying furnace 20, carbonization furnace 30, water separation equipment 40, combustion furnace 50 as shown in FIG. , Heat exchanger 60, air purification 70, and carbide discharge 100.

The organic waste storage facility 10 includes a well-known storage hopper 11 in which various organic wastes such as sewage and wastewater sludge and food waste are stored, and a well-known screw conveyor for quantitatively supplying the stored organic waste to the drying furnace 20. It is made of the same metering means 12.

The drying furnace 20 is for drying the organic waste quantitatively supplied from the organic waste storage facility 10 by the heat of the combustion gas or the auxiliary burner 21 supplied from the combustion furnace 50, and by the low temperature combustion gas. It consists of a low temperature drying furnace 80 installed at the top for drying the organic waste, and a high temperature drying furnace 90 installed at the bottom for drying the low temperature dried organic waste with a high temperature combustion gas.

As shown in FIG. 3, the inner end of the jacket 80a of the low temperature drying furnace 80 is provided with an input end 81a and an discharge end 81b connected to the organic waste storage facility 10 at both ends, respectively. The roller support portion 83 supported by the support roller 82 is fixedly installed on the outer circumferential surface of the and central portion, and the driving gear portion 84 is fixedly installed on one side outer circumferential surface of the roller support portion 83 installed on the central portion, and the input end portion 81a is fixed. On the inner circumferential side of the feed screw plate 85 is helically fixed, and the entire inner circumferential surface is a low-temperature drying slow rotating drum 87 in which a plurality of agitating blades 86 are spirally fixed to the driving gear. 84 is rotatably installed by a drive motor 88 for interlocking, and the organic matter quantitatively supplied from the organic waste storage facility 10 in the input end portion 81a side of the low-temperature drying slow rotating drum 87.A crushing double screw 89 for crushing the waste is rotatably installed by the drive motor 89a.

Inside the jacket 90a of the high temperature drying furnace 90, an input end 91a and an discharge end 91b connected to the discharge end 81b of the slow-driving slow rotating drum 87 for low temperature drying are provided at both ends, respectively. The roller support portion 93 supported by the support roller 92 is fixedly installed on the outer circumferential surface of the and central portion, and the driving gear portion 94 is fixedly installed on one side outer circumferential surface of the roller support portion 93 installed on the central portion. On the inner circumferential side of the feed screw plate 95 is fixedly installed in a spiral, and the entire inner circumferential surface is a high-speed drying slow rotating drum 97, in which a plurality of agitating blades 96 are spirally fixed to the driving gear. 94 is rotatably installed by the drive motor 98 for interlocking, and the discharge end of the low-temperature drying slow rotating drum 87 inside the input end 91a side of the high-temperature drying slow rotating drum 97 Organic waste transported from A crushing double screw 99 for crushing is rotatably installed by the drive motor 99a.

The low-temperature drying slow rotating drum 87 and the high-temperature drying slow rotating drum 97 installed in the low temperature drying furnace 80 and the high temperature drying furnace 90 respectively support the roller support parts 83 and 93. The rollers 82 and 92 are rotated slowly by the drive motors 88 and 98 which interlock the drive gears 84 and 94 while maintaining the horizontal state, so that a uniform load is distributed to the drive portion and abrasion, etc. Not only the durability is greatly improved, but also the maintenance is easy.

The carbonization furnace 30 burns the organic waste quantitatively supplied by the quantitative input means 22, such as a known screw conveyor, connected to the discharge end of the drying furnace 20 while maintaining airtightness with external air. It is for carbonizing with the heat of the combustion gas supplied from the furnace 50 or the heat of the auxiliary burner 31, and the inside of the jacket 30a of this carbonization furnace 30 has a cross-sectional shape as shown in FIG. 4 and FIG. It is formed in the form of a reverse heart, and an organic waste inlet 31 and a dry gas exhaust hole 32 are formed on one side, and a carbide outlet 33 is formed on the other side, and a pair of screw conveyors 34 and 35 are formed on both sides of the inside. Is fixed to the carbide tube 37 rotatably installed by the drive motor 36.

At the rear end of the carbonization furnace 30, a carbide inlet 101 is formed at one side and connected to a carbide outlet 33 of the carbide tube 37, and a carbide outlet 102 through which the cooled carbide is discharged at the other side. Carbide cooling outer cylinder 106 is formed and installed so as to surround the outer side of the carbide discharge inner cylinder 105 and the carbide discharge inner cylinder 105, the screw conveyor 103 is rotatably installed by the drive motor 104 therein. Carbide discharge facility consisting of 100 is installed. At this time, the cooling water is stored inside the carbide cooling outer cylinder 106, or a known cooling device is installed.

The water separation equipment 40 is to separate the moisture from the exhaust gas generated in the drying process, and then supply the exhaust gas from which the moisture is removed to the combustion furnace 50, a well-known water condenser commonly used in incinerators ( 41) and a known separator 42 are used.

The combustion furnace 50 is a high temperature combustion gas obtained by burning the exhaust gas supplied from the water separation equipment 40 and the carbonized dry gas generated in the carbonization process of the carbonization furnace 30 of the carbonization furnace 30. As for supplying sequentially into the drying furnace 20 through the inside, the well-known combustion furnace normally used for an incinerator etc. is used.

The heat exchange facility (60) warms the air introduced from the outside by heat exchange between the carbonization furnace (30) and the combustion gas passing through the interior of the drying furnace (20). In order to blow into the inside of 20), the well-known heat exchange facilities normally used for an incinerator etc. are used.

The air purifying facility 7 is for filtration of the combustion gas cooled through the heat exchange facility 60 and then discharged into the atmosphere. A known air purifying facility commonly used in an incinerator or the like is used.

Referring to the functional relationship of the organic waste carbonization apparatus according to the present invention configured as described above are as follows.

First, when various organic wastes to be carbonized are stored in the storage hopper 11 provided in the organic waste storage facility 10, the stored organic wastes are transferred to the interior of the low temperature drying furnace 80 by the metering means 12. Quantitatively charged.

Organic waste quantitatively introduced into the low-temperature drying furnace 80 is crushed by the crushing double screw 89 installed inside the input end 81a side of the low-temperature drying slow rotating drum 87, and the low-temperature drying slow rotating drum. Into the inside of the 87, the organic waste introduced into the slow drying drum 87 for low temperature drying is the combustion supplied from the combustion furnace 50 into the jacket 80a of the low temperature drying furnace 80. The inlet end 81a side inside the low-temperature drying slow rotating drum 87 which is slowly rotated by the driving motor 88 while being indirectly heated to a temperature of 150 to 200 ° C. by the heat of the gas or the auxiliary burner 21. During the section in which the conveying screw plate 85 is spirally installed on the inner circumferential surface, it is rapidly conveyed by the conveying screw plate 85, and then a plurality of stirring portions whose ends are bent upward on the inner circumferential surface of the low-temperature drying slow rotating drum 87 While the blade 86 is installed, Slowly moving up and down by slow rotation of the slow rotating drum 87 for drying while slowly moving to the discharge end 81b side of the low temperature dry slow rotating drum 87 for 1.5 hours, so that the water content is 65 ± 3. It is dried up to%.

The organic waste having low temperature drying in the low temperature drying furnace 80 is introduced into the high temperature drying furnace 90 through the discharge end 81b of the slow rotating drum 87 for low temperature drying, and the high temperature drying furnace 90 The organic waste quantitatively injected into the inside is crushed by the crushing double screw (99) installed inside the input end portion (91a) side of the high-temperature drying slow rotating drum (97) to the inside of the high-temperature drying slow rotating drum (97). In this way, the organic waste introduced into the slow drying drum 97 for high temperature drying is the combustion gas or auxiliary burner 21 supplied from the combustion furnace 50 into the jacket 90a of the high temperature drying furnace 90. Transfer screw plate to the inner peripheral surface of the feed end 91a side in the inside of the high temperature drying slow rotating drum 97 which is slowly rotated by the drive motor 98 while being indirectly heated to a temperature of 200 to 350 ° C by the heat of During the spirally installed section (95) After the rapid transfer by the plate 95 is installed in the inner circumferential surface of the slow drying drum 97 for high temperature drying, a plurality of agitating blades 96 whose ends are bent upwards are installed in the slow drying drum 97 for high temperature drying. Slowly moving up and down by slow rotation, slowly moving to the discharge end 91b of the slow drying drum 97 for high temperature drying while slowly stirring over 1.5 hours, thereby drying to a water content of 35 ± 3% or less.

As such, the organic waste is slowly dried over three hours at low and high temperature conditions by the low temperature and high temperature drying furnaces 80 and 90, whereby only the surface of the organic waste is dried or volatilized by fly dust due to conventional rapid drying. It can be sufficiently dried to the inside of the organic waste without generating odors or odors.

The organic wastes which have been dried by the low temperature and high temperature drying furnaces 80 and 90 are removed from the discharge end 91b of the slow rotating drum 97 for high temperature drying by means of a metering means 22 such as a screw conveyor. 30) is dosed into the interior.

The organic waste quantitatively introduced into the carbonization furnace 30 is introduced into the carbonization pipe 37 through the organic waste inlet 31 formed on one side of the carbonization pipe 37 and into the carbonization pipe 37. The introduced organic waste is agitated and transferred by a pair of screw conveyors 34 and 35 installed inside the carbonization pipe 37 and is supplied from the combustion furnace 50 into the jacket 30a of the carbonization furnace 30. It is carbonized by indirect heating at a temperature of 550 to 650 ° C by the combustion gas or the heat of the auxiliary burner 21. In this case, since the cross section is formed in a reverse heart shape, the carbide tube 37 has a heat transfer area of the combustion gas supplied from the combustion furnace 50 or the auxiliary burner 21 in a larger heat transfer area. It can be delivered to the can significantly improve the energy efficiency.

Carbide in the high temperature state carbonized through the carbonization furnace (30) is transferred to the carbide discharge facility (100) connected to the rear end of the carbonization furnace (30) through the carbide outlet (33) formed on the other side lower portion of the carbonization pipe (37) And, the carbide transported to the carbide discharge facility 100 is introduced into the inside of the carbide discharge inner cylinder 105 through the carbide inlet 101 formed on the upper side of the carbide discharge inner cylinder 105, the carbide discharge inner cylinder ( Carbide introduced into the inside of the 105 is carried by the screw conveyor 103 installed inside the carbide discharge inner cylinder 105 while inside the carbide cooling outer cylinder 106 installed outside the carbide discharge inner cylinder 105. The packaging for the carbide is easily cooled by the provided cooling water or the cooling device, and is discharged to the outside through the carbide discharge port 102 formed at the other side of the lower side of the carbide discharge inner cylinder 105.

On the other hand, the exhaust gas generated in the drying process of the low temperature drying furnace 80 and the high temperature drying furnace 90 is removed by the water condenser 41 and the water separator (42) provided in the water separation facility (40). It is sent to the combustion furnace 50 in the opened state and the combustion gas of 850 ~ 950 ℃ is generated by the burner in the combustion furnace 50 together with the carbonized dry gas generated in the carbonization process of the carbonization furnace 30. The combustion gas generated in this way is sequentially supplied to the carbonization furnace 30, the high temperature drying furnace 90, and the low temperature drying furnace 80.

In this way, the combustion gas generated in the combustion furnace 50 passes through a carbonization furnace 30 requiring a heat source of 550 to 650 ° C, and a high temperature drying furnace 90 and a heat source of 150 to 200 ° C that require a heat source of 200 to 350 ° C. Since the low-temperature drying furnace 80, which requires a heat source, can be naturally supplied according to its cooling process, the waste heat of the combustion gas can be utilized to the maximum, thereby greatly reducing the fuel used.

In addition, the combustion gas used as a heat source of the carbonization furnace 30, the high temperature drying furnace 90, and the low temperature drying furnace 80 is introduced into the heat exchange facility 60 and heat exchanged with air introduced from the outside, followed by an air purification facility. The outside air discharged into the atmosphere via 70 and warmed by heat exchange with the combustion gas is supplied to the heat sources of the low temperature drying furnace 80 and the high temperature drying furnace 90.

Thus, even after using the combustion gas generated in the combustion furnace 50 as a heat source of the carbonization furnace 30, the high temperature drying furnace 90 and the low temperature drying furnace 80 is introduced into the heat exchange facility 60 again to be introduced from the outside The heat exchange with the air allows the waste heat remaining in the combustion gas to be recovered as much as possible, while the external air heated by the heat exchange with the combustion gas is a heat source of the low temperature drying furnace 80 and the high temperature drying furnace 90. By making it possible, the fuel required for the drying process can be greatly reduced.

In addition, as another embodiment of the organic waste carbonization apparatus according to the present invention, as shown in FIG. 6, a pair of screw conveyors 34 and 35 installed in the carbonization pipe 37 of the carbonization furnace 30 are provided. The shafts of the carbide tube 37 and the screw conveyors 34 and 35 are configured by fixing the metal brushes 38 and 39 to the ends of the provided screw blades 34a and 35a, respectively. Since friction between the screw blades 34a and 35a and the inner circumferential surface of the carbide tube 37 due to deformation or sag can be minimized, durability can be greatly improved.

As described above, the organic waste carbonization method and apparatus according to the present invention are slowly dried in an indirect slow-drying method in a low-temperature and high-temperature drying furnace to sufficiently dry the organic waste to the inside of the organic waste, and to maintain airtightness with external air. By indirect heating in the furnace, the carbonized hot carbide is discharged to the outside in a cooled state to produce high quality carbides with a significant reduction in volume and weight. Also, low temperature and high temperature drying of organic waste The exhaust gas and carbonized dry gas generated in the process and carbonization process are burned in the combustion furnace to reduce odor, and the high temperature combustion gas can be sequentially recycled as a heat source for carbonization, high temperature drying and low temperature drying. By supplying the energy efficiency can be maximized.

Claims (3)

An organic waste storage and input process (1) for quantitatively introducing organic waste stored in a storage hopper into a drying furnace by a quantitative supply means; A drying step (2) of drying the organic wastes quantitatively introduced into the drying furnace through the organic waste storage and input step (1) by indirect heating with heat of combustion gas or auxiliary burner supplied from the combustion furnace in the drying furnace; Carbonization process in which the organic waste quantitatively introduced into the carbonization furnace through the drying step (2) is carbonized by indirectly heating by the heat of the combustion gas or auxiliary burner supplied from the combustion furnace while maintaining airtightness with external air in the carbonization furnace. (3) and Water separation process (4) for removing the water contained in the exhaust gas generated in the drying step (2) by a water condenser and a water separator; The exhaust gas from which water is removed through the water separation process (4) and the carbonized dry gas generated in the carbonization process (3) are burned in a combustion furnace with a burner to generate a combustion gas having a temperature of 850 to 950 ° C. A combustion step 5 of sequentially supplying gas to a carbonization furnace and a drying furnace, Heat exchange process (6) through the combustion process (5) to introduce the combustion gas used as a heat source of the carbonization furnace and drying furnace to the heat exchanger to exchange heat with the air introduced from the outside to supply the heated external air to the drying furnace (6) and, In the air purification and discharge step (7) consisting of purifying the combustion gas passed through the heat exchange step (6) by the air purifier and then discharged into the air, The drying step (2) is indirectly heated by the heat of the combustion gas or auxiliary burner supplied from the combustion furnace in the low-temperature drying furnace through the organic waste storage and input step (1) to the organic waste quantitatively input to 150 ~ 200 ℃ A low temperature drying process (2a) for drying the water content of the organic waste to 65 ± 3% or less by drying at a temperature of 1.5 hours, and the combustion of the organic waste that has passed the low temperature drying process (2a) from the combustion furnace in a high temperature drying furnace. Indirect heating by heat of gas or auxiliary burner and drying for 1.5 hours at a temperature of 200 ~ 350 ℃ to dry the water content of organic waste to 35 ± 3% or less, consisting of a high temperature drying process (2b), The carbonization process (3) burns the organic waste dried at a water content of 35 ± 3% or less through the low temperature drying process (2a) and the high temperature drying process (2b) while maintaining airtightness with external air in a carbonization furnace. By indirect heating to a temperature of 550 ~ 650 ℃ by the combustion gas or the heat of the auxiliary burner supplied from the furnace is carbonized, After the carbonization process (3), a carbide cooling and discharging process (3a) for discharging the carbide having a reduced volume and weight through the carbonization process (3) while being cooled by a carbonization discharge facility equipped with a cooling device is added. Organic waste carbonization method characterized in that. Organic waste storage facility (10) consisting of a storage hopper (11) for storing various organic wastes, quantitative input means 12 for quantitatively supplying the stored organic waste to the drying furnace 20, and the organic waste storage facility (10) And a quantitative input means connected to a drying furnace 20 for drying the organic waste quantitatively supplied from the furnace by the heat of the combustion gas or the auxiliary burner 21 supplied from the combustion furnace 50 and the discharge end of the drying furnace 20. A carbonization furnace 30 for carbonizing the organic waste quantitatively supplied by the 22 with heat of the combustion gas supplied from the combustion furnace 50 or heat of the auxiliary burner 31 while maintaining airtightness with the external air; Separation equipment 40 for separating the moisture from the exhaust gas generated in the drying process of the drying furnace 20 and supplying the exhaust gas from which the moisture is removed to the combustion furnace 50, and the water separation equipment 40 Exhaust gas supplied from Combustion furnace 50 for sequentially supplying a high temperature combustion gas obtained by burning carbonized dry gas generated in the carbonization process of the furnace 30 through the inside of the carbonization furnace 30 to the interior of the drying furnace 20 and After heating the air introduced from the outside by heat exchange between the carbonization furnace 30 and the combustion gas passing through the interior of the drying furnace 20, the heated external air is blown into the interior of the drying furnace 20. In the organic waste carbonization apparatus consisting of a heat exchanger (60) to make, and an air purifier (70) for filtering the combustion gas cooled through the heat exchanger (60) and then discharges it into the atmosphere. The drying furnace 20 is a low temperature drying furnace 80 is installed at the top to dry the organic waste by the low temperature combustion gas, and a low temperature drying organic waste is installed at the lower portion to dry the high temperature combustion gas It consists of a high temperature drying furnace (90), Inside the jacket 80a of the low temperature drying furnace 80, an input end 81a and an discharge end 81b connected to the organic waste storage facility 10 are provided at both ends, respectively, and are supported on the outer peripheral surfaces of both ends and the center. The roller support portions 83 supported by the rollers 82 are fixedly installed, and the drive gear portion 84 is fixedly installed on one side outer circumferential surface of the roller support portion 83 provided at the center portion, and on the inner circumferential surface of the feed end portion 81a side. A low speed drying slow rotating drum 87, in which a screw plate 85 for screwing is fixed in a spiral shape and a plurality of stirring blades 86 whose ends are upwardly bent in a spiral shape, is installed in the entire inner circumferential surface of the driving gear 84. Rotating by the drive motor 88 for interlocking with each other, the organic waste which is quantitatively supplied from the organic waste storage facility 10 inside the input end 81a side of the low-temperature drying slow rotating drum 87 For shredding Double screw 89 is rotatably installed by the drive motor (89a), Inside the jacket 90a of the high temperature drying furnace 90, an input end 91a and an discharge end 91b connected to the discharge end 81b of the low-temperature drying slow rotating drum 87 are respectively provided at both ends. The roller support portion 93 supported by the support rollers 92 is fixedly installed on the outer circumferential surfaces of both ends and the center portion, and the driving gear portion 94 is fixedly installed on one side outer circumferential surface of the roller support portion 93 installed at the center portion. On the inner circumferential surface of the end portion 91a side, a screw plate 95 for conveying is fixed in a spiral shape, and a slow rotating drum for high temperature drying in which a plurality of stirring blades 96 whose ends are upwardly bent are fixed in a spiral shape is installed on the entire inner circumferential surface. ) Is rotatably installed by the drive motor 98 for interlocking the drive gear 94, and inside the input end 91a side of the slow drying drum 97 for high temperature drying, a slow rotating drum 87 for low temperature drying. Organic waste conveyed from the discharge end 81b of Crushing double screw 99, for which the fracturing is pivotally mounted by a drive motor (99a), Inside the jacket 30a of the carbonization furnace 30, the cross-sectional shape is formed in an inverted heart shape, and an organic waste inlet 31 and a dry gas exhaust hole 32 are formed at one upper side thereof, and a carbide is formed at the other side. A discharge opening 33 is formed, and a pair of screw conveyors 34 and 35 are rotatably installed by a drive motor 36 on both sides thereof, and a carbon pipe 37 is fixedly installed. At the rear end of the carbonization furnace 30, a carbide inlet 101 is formed at one upper portion and connected to a carbide outlet 33 of the carbide tube 37, and a carbide outlet 102 at which the cooled carbide is discharged to the other lower side. And a screw conveyor 103 is formed therein, the carbide cooling inner cylinder 105 is installed so as to surround the outer side of the carbide discharge inner cylinder 105, rotatably installed by the drive motor 104 for the carbide cooling The organic waste carbonization apparatus, characterized in that the carbide discharge facility consisting of the outer cylinder 106 is configured to be connected. The brush 38 of claim 2, wherein the end of the screw blades 34a and 35a provided in the pair of screw conveyors 34 and 35 installed inside the carbide tube 37 is made of a metal brush 38. Organic waste carbonization apparatus, characterized in that 39 is configured to be fixed respectively.

Images