JP2005103344A - Garbage treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a garbage treatment apparatus in which garbage can efficiently be heated indirectly by heating air while restraining the generation of a bad smell. <P>SOLUTION: Air from a fan 20 is made to pass through an electric heater 26 to become heating air, which is then introduced into an air heating chamber 16. The garbage agitated by an agitation blade 12 in a treatment tank 10 is heated uniformly by the indirect heating of the heating air in the air heating chamber 16. The malodorous gas generated from the garbage while heating the garbage in the treatment tank 10 is heated by the heater 26 together with the outdoor air passing through an outdoor air introducing passage 18 to the active temperature of a catalyst, the heated malodorous gas is then deodorized in a catalyst apparatus 28. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a garbage processing apparatus of a type that indirectly heats garbage with heated air.

  Many types of garbage processing apparatuses that dry garbage with heated air dry the garbage by directly introducing heated air into the garbage in the treatment tank. However, when direct heating of garbage is performed, it is difficult to uniformly heat the garbage, and even though localized carbonization has occurred, it is easy to cause heating spots, such as partial drying. There was a problem that could not be done. Therefore, there is one that performs indirect heating with heated air. The heated air is obtained by exchanging heat between the outside air and the fuel gas generated by fuel combustion, and the heated air is introduced into an indirect heating chamber around the processing chamber. The air from the processing chamber during the drying of the garbage is used as combustion air, and the off-flavor components such as water vapor therein are burned together with the fuel to suppress the generation of odor (Patent Document 1).

JP-A-9-229556

  In the prior art, fuel is burned to obtain warm air, but the combustion air at that time is obtained from the processing chamber during drying of garbage, so by burning the odor component together with the fuel, Occurrence of off-flavors that can occur if the air in the processing chamber is directly discharged to the outside is suppressed. However, since the air obtained from the garbage processing chamber contains a considerable amount of water vapor, it is not suitable as combustion air, has poor combustion efficiency, and cannot be efficiently heated, and has incomplete combustion. Odor might be generated due to this. The present invention has been made in view of the problems of the prior art, and an object thereof is to enable efficient heating while suppressing the generation of a strange odor.

  According to the first aspect of the present invention, there is provided a treatment tank for containing and drying garbage, and air heating that is provided on the outer peripheral side of the treatment tank and indirectly heats the garbage in the treatment tank with heated air. A chamber, one end opened to the outside air, the downstream side opened to the space above the garbage being dried in the treatment tank, the other end opened to the air heating chamber, one end opened to the treatment tank, etc. An air discharge passage having an end opened to the outside, an air flow forming means for forming an air flow from the outside air introduction passage to the outside air through the air heating chamber and the air discharge passage, and the outside air introduction passage from the garbage together with the outside air A heating means that heats the generated gas prior to introduction into the air heating chamber, and a deodorizing catalyst device installed between the heating means and the air heating chamber are provided. A garbage disposal apparatus is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the air flow forming means is a blower fan installed on the one end side of the outside air introduction passage. Is provided.

  According to a third aspect of the present invention, there is provided a garbage disposal apparatus according to the first or second aspect, wherein the heating means is an electric heater.

  According to the invention described in claim 4, in the invention described in any one of claims 1 to 3, the other end of the outside air introduction passage is opened only in the air heating chamber, and only indirect heating by heated air is performed. The garbage processing apparatus characterized by performing heating of garbage by is provided.

  The air flow forming means forms a flow of heated outside air to the air heating chamber through the outside air introduction passage, the heating means, and the catalyst device, and indirectly in the garbage in the treatment tank. Heat. Since the odor component gas contained in the water vapor generated from the garbage by heating is heated by the heating means in advance and reaches the activation temperature and then processed by the catalyst device, ideal deodorization can be performed. Combines both heating of the outside air and heating of the odor component gas for deodorization, which can be done with a single heater, and is structurally simple, realizing cost reduction without sacrificing processing performance. Can do.

  The operation and effect of the invention of claim 2 will be described. The odor component gas contained in the steam discharged from the garbage by the outside air and heating by the blower fan can be efficiently sent.

  The operation and effect of the invention of claim 3 will be described. The odor component gas contained in the water vapor discharged from the garbage can be heated to the activation temperature of the catalyst without fear of incomplete combustion by the electric heater.

  The action and effect of the invention of claim 4 will be described. The heating of garbage is performed only by indirect heating with air, and heating without uniform spots can be performed without fear of carbonization.

  Hereinafter, an embodiment of the garbage processing apparatus of the present invention will be described. In FIG. 1, reference numeral 10 denotes a treatment tank for containing and drying garbage, and the upper surface of the treatment tank 10 is completely closed by an upper lid 11. A stirring blade 12 is disposed inside the processing tank 10, and a plurality of stirring blades 12 are provided on the rotating shaft 14, and both ends of the rotating shaft 14 are pivotally supported by bearings (not shown) on the side walls of the processing tank 10 and are not shown. It is connected to a rotary drive electric motor. An air heating chamber 16 for indirectly heating the garbage in the treatment tank 10 with heated air is formed on the outer periphery of the lower front surface of the treatment tank 10. The outside air introduction passage 18 is provided with a blower fan 20 at one end. The blower fan 20 sucks outside air, and the sucked outside air is introduced into the outside air introduction passage 18 as indicated by an arrow a. A space 22 above the garbage G in the treatment tank 10 is opened in the outside air introduction passage 18 at a site downstream of the blower fan 20, and water vapor and odor generated from the garbage during drying of the garbage G in the treatment tank 10. The component gas is introduced into the outside air introduction passage 18 as indicated by an arrow b, and is sent to the heater side along with the outside air as indicated by an arrow c. The downstream end of the outside air introduction passage 18 is connected to the air heating chamber 16. Reference numeral 24 denotes a discharge passage. One end of the discharge passage 24 is connected to the air heating chamber 16, and the other end 24A is open to the outside air.

  The electric heater 26 is disposed in a portion of the outside air introduction passage 18 near the air heating chamber 16 and heats the gas (arrow d) generated from the garbage together with the outside air before introducing it into the air heating chamber 16. A catalyst device 28 is provided in the outside air introduction passage 18 on the downstream side of the electric heater 26. The catalyst device 28 includes, for example, a platinum-based catalyst, and reacts with odorous component gas generated during heating of garbage to perform deodorization. It functions and is introduced into the air heating chamber 16 as shown by an arrow e after deodorization.

  In FIG. 1, an opening 32 is formed in the lower part of the side wall on one side of the treatment tank 10 for taking out garbage after drying is completed. The opening 32 is normally closed by a lid, but when the garbage drying process is completed, the stirring blade 12 rotates to move the dried garbage in the axial direction, thereby not disposing the garbage. The collection box is collected by opening the lid, and the collection box is pulled out so that the garbage after drying can be easily taken out.

  The air from the blower fan 20 is heated to a temperature of 300 to 400 ° C. when passing through the electric heater 26 from the outside air introduction passage 18 and is introduced into the air heating chamber 16 through the catalyst device 28 as indicated by an arrow e. As shown in FIG. Garbage in the air heating chamber 16 stirred by the stirring blades 12 can receive uniform heating without causing carbonization due to local overheating due to indirect heating by the heated air in the air heating chamber 16, and for 6 to 8 hours. It is dried to a moisture content of 5 to 15% over time. The odor gas generated from the garbage during the heating of the garbage in the treatment tank 10 is heated to the catalyst activation temperature by being heated by the heater together with the outside air passing through the outside air introduction passage 18. It can be removed efficiently. Therefore, no off-flavor is generated in the exhaust gas from the discharge passage 24.

  In the garbage processing apparatus of the present invention, the garbage in the treatment tank 10 is heated only indirectly by the heated air in the air heating chamber 16 outside the treatment tank 10, so that the garbage is heated and heated uniformly and without unevenness. In addition, since local overheating does not occur, carbon content is small, and it can be made suitable for the use of fertilizer and the like in terms of recycling. Further, water vapor generated during the drying of the garbage in the treatment tank 10 and the odor gas component contained therein are heated to the catalyst 28 after being heated by the heater 26 together with the air from the blower fan 20. Therefore, it can be efficiently removed by the catalyst 28. Further, since the heating of the odor gas component generated by the heating of the garbage and the heating for drying the garbage are shared by the single heater 26, the efficient heating can be performed. Further, the reaction with the odor gas component in the catalyst 28 made of a platinum catalyst generates heat by itself and can contribute to raising the temperature of the air somewhat.

FIG. 1 is a schematic sectional view of a garbage disposal apparatus of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Processing tank 11 ... Upper lid 12 ... Stirring blade 14 ... Rotating shaft 16 ... Air heating chamber 18 ... Outside air introduction passage 20 ... Blower fan 24 ... Discharge passage 26 ... Electric heater 28 ... Catalyst device

Claims (4)

A treatment tank for storing and drying garbage, an air heating chamber provided on the outer peripheral side of the treatment tank for indirectly heating the garbage in the treatment tank with heated air, and one end opened to the outside and downstream The side opens to the space above the garbage being dried in the treatment tank, the other end opens to the air heating chamber, the one end opens to the treatment tank and the other end opens to the outside, An air flow forming means for forming an air flow from the outside air introduction passage to the outside air through the air heating chamber and the air discharge passage, and a gas generated in the outside air introduction passage along with the outside air from the garbage is introduced into the air heating chamber. A garbage disposal apparatus comprising: a heating means for heating in advance; and a deodorizing catalyst device installed between the heating means and the air heating chamber. 2. The garbage processing apparatus according to claim 1, wherein the air flow forming means is a blower fan installed on the one end side of the outside air introduction passage. 3. The garbage disposal apparatus according to claim 1, wherein the heating means is an electric heater. In the invention according to any one of claims 1 to 3, the other end of the outside air introduction passage is opened only in the air heating chamber, and the garbage is heated only by indirect heating with heated air. Garbage disposal equipment.

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