JPH0240929B2 - - Google Patents

Description

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

Conventionally, as shown in FIG. 2, in this type of kitchen waste processing apparatus, a heat generating container 7 that generates heat by microwaves is placed at the inner bottom of a box body 1 which is a microwave resonator. An input port 9 for garbage 8, which can be opened and closed with a lid 9a that can be opened and closed, is provided on one side, and a supply port 4 is provided on the other side. The supply port 4 is connected to a microwave generator 2 via a waveguide 3, and is configured to supply microwaves into the main body 1. An air supply port 6 is provided below the supply port 4 and is connected to an air supply blower 5 that supplies air necessary for combustion into the main body 1 . The discharge side of the supply air blower 5 branches to the microwave generator 2 side, and supplies cooling air. The upper surface of the main body 1 is provided with an exhaust port 10 for exhaust gas generated by combustion of trash.
This exhaust port 10 is connected to an exhaust gas purification unit 13 consisting of an exhaust gas heater 11 and an oxidation catalyst 12, and further connected to an exhaust blower 14.

With the above configuration, when the garbage 8 is placed in the heat-generating container 7 and microwaves are radiated, the garbage 8 is heated by internal heat generation of itself and heated by the heat generated by the heat-generating container 7, and is burned to generate exhaust gas. When the generated exhaust gas passes through the exhaust gas purification unit 13, it is heated by the heater 11 to enhance the catalytic action, and then
It was purified and discharged by the oxidation catalyst 12.

Problems to be Solved by the Invention However, with such a conventional configuration, food waste 8
When the food waste is heated and dehydration progresses, the moisture generated from the food waste is transferred to the oxidation catalyst 12 in the exhaust gas purification unit 13.
There was a problem in that the efficiency of purifying smoke and odor generated by smoke and ignition after dehydration was completed until the water evaporated from the oxidation catalyst 12 deteriorated. Note that the oxidation catalyst 12 becomes active again when the attached moisture disappears.

The present invention solves these problems,
It is an object of the present invention to provide a kitchen waste treatment device with high exhaust purification efficiency by providing a catalyst activation function.

Means for Solving the Problem In order to solve this problem, the kitchen waste processing apparatus of the present invention includes a main body that is a microwave resonator, a microwave generator that radiates microwaves into the main body, and a microwave generator that emits microwaves into the main body. a heat-generating container disposed inside the main body that generates heat by microwaves; an exhaust port for discharging the gas in the main body; an exhaust gas purification unit that communicates with the exhaust port and includes an exhaust heater and a catalyst; a humidity detection unit that detects when the dehydration of food waste in the main body is completed;
The kitchen waste processing apparatus includes a control section that stops the microwave generator for a predetermined period of time in response to a signal from the humidity detection section and operates the blower to blow air onto the catalyst.

Effect With this configuration, the moisture that evaporates from the garbage during the initial heating stage adheres to the catalyst in the exhaust gas purification unit and becomes inactive, but the humidity detection unit installed inside the main body detects the point at which the dehydration is completed, that is, smoke, smoke, etc. The controller detects when an odor is about to occur, stops the microwave generator, and operates the blower connected to the purification unit for a set period of time to blow only air to disperse moisture adhering to the catalyst and restore the activated state. After that, the microwave control section energizes the microwave generator again, so the generated smoke, odor, and catalyst can be efficiently purified.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIG. Note that parts that are the same as those in the conventional configuration are given the same numbers, and detailed explanation thereof will be omitted.

In the figure, a main body 1 as a microwave resonator is provided inside an outer shell 17, and inside this main body 1 there is a sintered body made of a sintered body of silicon carbide and barium titanate.
A heat generating container 7 having the above heat resistance is placed. An input port 9 for garbage 8 is provided on one side of the main body 1, and a supply port 4 is provided on the other side. This supply port 4 is connected to the microwave generator 2 via the waveguide 3.
is connected to. An air supply port 6 communicating with a supply air blower 5 is provided below the supply port 4, and
The discharge side of the supply air blower 5 branches to the microwave generator 2 side, and an exhaust port 10 is provided on the top surface of the main body 1 that supplies cooling air. An exhaust gas purification unit 13 is connected thereto, and an exhaust blower 14 is further connected thereto. A humidity detection section 15 consisting of a humidity sensor is attached below the air supply port 6 to detect the humidity inside the main body 1 and send a signal to the microwave control section 16 to control the microwave generator 2. . Each opening of the main body 1, except for the supply port 4, is provided with means for preventing leakage of radio waves.

With the above configuration, when microwaves are radiated to the food waste 8 in the heat-generating container 7, the food waste 8, which has a high water content, low thermal conductivity, and is difficult to heat from the outside because there are many spaces between the waste particles, is instantly removed. At the same time, the heating container 7 is heated to heat and dehydrate the garbage 8. Considering the humidity change inside the main body 1, dehydration starts when the microwave generator 2 is energized and the humidity inside the main body 1 increases rapidly. Then, as the dehydration progresses and the moisture in the garbage 8 disappears, the humidity decreases, and the temperature of the garbage 8, which was almost constant during dehydration, rises, leading to smoke and ignition. This change in humidity inside the main body 1 is detected by the humidity detection section 15 using a humidity sensor inside the main body 1, and the microwave control section 16 detects the change in humidity in the main body 1 at the point when the humidity increases once and then decreases, that is, immediately before smoke or ignition occurs. The microwave generator 2 is stopped, and only air is blown for a preset time to evaporate and remove moisture adhering to the oxidation catalyst 12 in the exhaust gas purification unit 13, returning the oxidation catalyst 12 to an active state. Then, the microwave generator 2 is energized again to raise the temperature of the garbage 8, and the air supply blower 5 supplies air from the air supply port 6 to ignite and burn it. The exhaust gas generated by this combustion enters the exhaust gas purification unit 13, is heated to the catalytic reaction temperature by the exhaust gas heating heater 11, is purified by the activated oxidation catalyst 12, and is exhausted by the exhaust blower 14.

As described above, according to the present invention, it is possible to avoid the adverse effect of moisture from the garbage 8 on the catalyst, and it is possible to improve the purification efficiency of exhaust gas.

The sensor used in the humidity detection section 15 may be an infrared sensor, a weight sensor, etc., as long as it can detect when the dehydration of the garbage 8 has been completed, for example, when the weight of the garbage has stopped decreasing. It may also be something that can detect the location.

Further, while the microwave generator 2 is stopped and the air is being blown, the heater 11 can be energized to quickly remove water adhering to the catalyst.

Furthermore, the catalyst may be a ceramic-based catalyst such as a deolite-based catalyst.

Effects of the Invention As described above, according to the present invention, by detecting the end of dehydration of garbage and only blowing air, the moisture that has evaporated and adhered to the catalyst up to that point is removed.
The catalyst is returned to an active state and then reheated to allow the exhaust gas to flow into the catalyst, making it possible to improve the purification efficiency of the exhaust gas.Especially after the dehydration is completed, high concentration exhaust gas is generated, which then gradually decreases. It is possible to respond to the exhaust gas generation situation and improve the purification efficiency at the time when a high concentration is generated.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a kitchen waste processing apparatus according to an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a conventional kitchen waste processing apparatus. 1...Main body, 2...Microwave generator, 7...
... Heat generating container, 10 ... Exhaust port, 11 ... Exhaust gas heating heater, 12 ... Oxidation catalyst, 13 ... Exhaust gas purification unit, 15 ... Humidity detection section, 16 ... Microwave control section.

Claims (1)

[Claims] 1. A main body as a microwave resonator, a microwave generator that radiates microwaves into the main body,
A heat-generating container disposed in the main body and generating heat by microwaves, an exhaust port for discharging gas in the main body, an exhaust gas purification unit communicating with the exhaust port and comprising a heater for heating the exhaust gas and a catalyst, and the exhaust gas It is equipped with an air blower communicating with the purification unit, a humidity detection section that detects when the dehydration of food waste in the main body is completed, and a control section that receives a signal from the humidity detection section, and the control section receives a signal from the humidity detection section. A kitchen waste processing apparatus characterized in that the microwave generator is stopped for a predetermined period of time in response to a signal from the above, and the blower is operated to blow air to the catalyst.