JPS62218715A - Garbage disposing device - Google Patents

Abstract

PURPOSE:To provide a energy-saving type garbage disposing device which enables purification of exhaust gas without reheating exhaust gas generated during disposal of garbage, by a method wherein an air inlet and an air outlet are formed in a body serving as a microwave resonator, and a catalyst oxide generating heat by means of microwaves is situated to the air outlet. CONSTITUTION:With a magnetron device 5 energized, microwaves are generated, and are exerted directly on garbage 4. The microwave momentarily heats the garbage 4 all the way through to the interior thereof, and simultaneously, are also exerted on a heat generating container 2. Further, the whole of a heat generating container 7 having excellent thermal conductivity is heated. Upon completion of dehydration, temperature is increased for combustion. At a point of time of transfer from dehydration to ignition, smoke and odor are produced. The exhaust gas is sucked through the working of an exhaust gas blower 102, and is fed to a catalyst oxide 100. In this case, since CO and HC concentration in exhaust gas is relatively high, oxidation combustion occurs simultaneously with purification to generate heat, and the temperature of the catalyst oxide 100 is increased to a high temperature exceeding temperature generated resulting from microwave heat generation, resulting in complete decomposition of odor components.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a kitchen waste processing device for reducing the amount of food waste by incinerating it using microwaves.

2. Description of the Related Art Conventionally, as shown in FIG. 3, this type of kitchen waste processing apparatus has a heat-generating container 2 that generates heat using microwaves disposed at the inner bottom of a box-shaped main body 1 which is a microwave resonator. Further, an input port 3 for garbage 40 is provided on one side of the main body 1, and this input port 3
is opened and closed by a lid 16 that can be opened and closed. A supply port 6 is provided on the other side of the main body 1, and a magnetron device 6 for generating microwaves for sending microwaves into the main body 1 is attached facing the supply port 6. An air supply lower is provided below the supply port 6 and is connected to an air supply blower 8 to supply air necessary for combustion into the main body 1. The supply air blower 8 also branches to the magnetron device 5 side and sends cooling air. The upper part of the main body 1 is provided with an exhaust port 9 for exhaust gas generated by combustion of garbage, and this exhaust port 9 is connected to an exhaust gas purification unit 12 via a flue 9a.
, are connected to the exhaust blower 13. The exhaust gas purification unit 12 includes a heater 1o and an oxidation catalyst 11. These exhaust gas purification unit 12, exhaust blower 1
3 is attached to the upper part of an outer shell 14 that covers the main body 1.

With the above configuration, when food waste 4 is placed in the heat-generating container 2 and microwaves are radiated, the food waste is burned by heating due to internal heat generation of the food waste itself and heating due to heat generation from the heat-generating container 2. At this time, the generated exhaust gas is transferred to the exhaust gas purification unit. Pass 12. This exhaust gas purification unit heats the exhaust gas with a heater 1o to enhance the catalytic action, and then purifies and discharges the exhaust gas with an oxidation catalyst 11.

Problems to be Solved by the Invention In such a conventional configuration, exhaust gas that is sufficiently hot due to combustion heat is cooled while passing through the flue 9a. It was necessary to reheat the catalyst using the heater 10 to the functional temperature (250° C. or higher).

Therefore, additional heating energy is required to reheat the exhaust gas, which is not suitable for energy saving. Further, there was a problem in that structures such as the flue 9a and the heater 1o were required.

The present invention is intended to solve these problems, and aims to provide an energy-saving and economical kitchen waste processing device that can purify the exhaust gas generated during food waste processing without reheating it. be.

Means for solving the problem In order to solve this problem, the kitchen waste processing apparatus of the present invention has the following features:
The main body is a microwave resonator with an air supply port and an exhaust port.
The exhaust port is provided with an oxide catalyst that generates heat by microwaves.

Function: With this configuration, when microwaves are radiated into the main body, exhaust gas is generated due to the combustion of garbage, which passes through the exhaust port and is discharged to the outside. When this exhaust gas is discharged, it is oxidized and decomposed into water, carbon dioxide, etc. by the oxide catalyst body which self-heats by microwaves and reaches the catalytic function temperature.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. Note that parts that are the same as those in the conventional configuration are given the same numbers, and their explanations will be omitted.

In the figure, a microwave resonator and a main body 1 are provided in an outer shell 14, and a heat generating container 2 is provided at the inner bottom of the main body 1.
is located. Then, a door 15 attached to one side of the main body 1 so as to be openable and closable is opened, and the garbage 4 is put into the heat generating container 2 through the input port 3. In addition, a supply port 6 is opened on the other side of the main body 1, and a magnetron device 6 is provided at the back of the 6 waveguides 6a connected to the supply port 6. An air supply lower is provided below the supply port 6 and is connected to an air supply blower 8. Further, the discharge side of the supply air blower 8 is branched to supply cooling air to the magnetron device 5. The heat generating container 2 is made of a sintered body of silicon carbide and barium titanate, has a heat resistance of 100° C. or higher, and generates heat by microwaves. An oxide catalyst body 10o formed in a honeycomb shape is attached to an exhaust port 101 provided on the upper side surface of the main body 1. This exhaust port 101 is connected to the exhaust blower 10 via the flue 101a.
2 are connected. Note that each opening of the main body 1, except for the microwave supply port 6, is provided with means for preventing leakage of radio waves.

In the above configuration, when the garbage 4 is energized to the netron device S at the input port of the main body 1, microwaves are generated and introduced into the main body 1 from the supply port 6 through the waveguide 6a. The microwave acts directly on the garbage 4.

In general, food waste 4 has a high water content and low thermal conductivity, and there are many spaces between the food wastes, so it is very difficult to externally heat the food waste. However, microwaves instantly heat the inside of the food waste 4. Heat it up. Moreover, it also acts on the heat generating container 2 at the same time. The heat generating container 2 is composed of a sintered body of silicon carbide and barium titanate, which is a ferroelectric substance, so it generates heat equivalent to the dielectric loss of barium titanate, and due to the good thermal conductivity of silicon carbide, it generates heat equivalent to the dielectric loss of barium titanate. The entire heat generating container 7 is heated. As a result,
As shown in FIG. 2, inside the heat-generating container 2, a high-temperature part 103 with extremely high temperature is formed by the heat generated by the internal heating of the food waste 4 and the heat from the heat-generating container 2, and the food waste 4 is almost completely burnt and only a small amount of heat is generated. Only white ash remains. On the other hand, as the heating by the microwave progresses, the garbage 4 is initially heated to the boiling point of water and is gradually dehydrated. Once dehydration is complete, the boiling point begins to be exceeded. When dehydration leads to ignition, a smoldering state occurs, producing smoke and odor. This is co.

The main components are unburned hydrocarbons in the form of HC and tar.

This exhaust gas is sucked by an exhaust blower 102, and the oxide catalyst body 1 has a honeycomb structure and has many cylindrical holes.
Sent to 00. The oxide catalyst body 100 contains fused silica, barium titanate,
A carrier made by sintering a mixture of silicon carbide and titanium dioxide is formed into a honeycomb structure, with titanium dioxide used as a support base material and platinum group metal supported as a catalyst. For this reason, when exposed to microwaves, the oxide catalyst body 1oO itself is heated to the functional temperature of the catalyst (approximately 2
The exhaust gas is heated to a temperature of 60°C or higher), and the exhaust gas that is sent is also heated, and the exhaust gas is oxidized by the catalytic effect, converting it into water or carbon dioxide gas and purifying it. At this time, since the concentration of Co and HC, which are unburned and burned products in the exhaust gas, is relatively high, catalytic oxidation combustion occurs along with purification and generates heat, so the temperature of the oxide catalyst body 1oo decreases due to microwave heat generation. reaches a high temperature (approximately 80°C) far above the temperature. Therefore, odor components in the exhaust gas that are not suitable for oxidation treatment are almost completely decomposed in this temperature range, and good deodorization can be achieved. The purified exhaust gas is then exhausted by the exhaust blower 102.

In addition, in the present invention, even if the garbage becomes ash and the load becomes zero, the heat generating container 2 and the oxide catalyst body 1o.

remains as a load, so the magnetron device 5 is not damaged in the so-called dry state. Furthermore, although barium titanate was used as the material for the microwave heat generating vessel, any ferroelectric material having heat resistance may be used. Although an oxide catalyst was used in this example, a ceramic catalyst such as a deolite catalyst or an intercalation (layering) compound can also produce similar effects.

Effects of the Invention As described above, according to the present invention, garbage is heated twice by direct internal heating by microwaves and heat from a heat-generating container and self-combusts, and the exhaust gas generated at that time is an oxide medium. Since it self-heats, it is completely decomposed without reheating with an auxiliary heater. Therefore, efficient exhaust gas treatment with less thermal energy loss is possible, and the heater that was conventionally required is not required, making it possible to reduce manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a kitchen waste processing apparatus according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view showing a processing state of a heat-generating container of the same kitchen waste processing apparatus, and FIG. 3 is a longitudinal cross-sectional view showing a conventional kitchen waste processing apparatus. 1... Body, 2... Heat generating container, 3...
...Input port, 6...Magnetron device, 6
...... Supply port, 7... Air supply port, 10o.
... Oxide catalyst body, 101 ... Exhaust port. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
11 Rekai 2-・Henku calculation each- 3--1 input ℃ 5---vri° Netron fhi 1 (0 E-1-z (τ co)

Claims (2)

[Claims] (1) A main body configured as a microwave resonator, an air supply port and an exhaust port provided in the main body, and arranged within the main body,
A kitchen waste processing device comprising a heat generating container that generates heat by microwaves, and a catalyst body that generates heat by microwaves provided at the exhaust port. (2) The catalytic body is an oxide catalytic body, and the oxide catalytic body is composed of a support made of lime aluminate, fused silica, barium titanate, silicon carbide, and titanium dioxide, and a platinum group metal is supported as a catalyst. A kitchen waste processing apparatus according to claim 1.