KR20030072284A - Method for treating agricultural chemicals residue and for sterilization using ozone with microwave oven function and the apparatus therefor - Google Patents

Abstract

PURPOSE: Provided are a method for treating residue of agricultural chemicals and for sterilization using ozone with microwave oven function and an apparatus therefor, thereby completely removing used ozone using manganese oxide catalyst. CONSTITUTION: A method for treating residue of agricultural chemicals and for sterilization using ozone with microwave oven function comprises the steps of: placing an object to be treated in a microwave oven; injecting ozone thereinto and removing agricultural chemicals residue by reaction of the ozone and the agricultural chemicals; and decomposing and removing autoexhaust by using catalyst.

Description

Method for treating sterilization and pesticide using ozone with microwave function {Method for treating agricultural chemicals residue and for sterilization using ozone with microwave oven function and the apparatus therefor}

The present invention relates to a method and apparatus for removing microwave pesticides remaining in fruits and vegetables using ozone, which is capable of cooking using microwaves. In particular, the ozone used for removing residual pesticides is manganese oxide. A method and apparatus for complete removal using a system catalyst are disclosed.

Through the rapid development of current industrial technology, mass cultivation is being carried out in agricultural technology. This is possible through large-scale input of pesticides. In general, pesticides administered to agricultural products are distributed without being completely processed. In recent years, as environmental concerns have increased, particularly, the effects of pesticides on the human body have been reported one after another, and regulations on pesticides have begun to be implemented in the 1960s in Korea.

However, cultivated farmers are using pesticides in excess of the regulations in order to extend the shelf life of agricultural products or to maximize production. Since such an excessive amount of pesticides is surely harmful to the human body, it must be processed and consumed, but practically, pesticides administered to agricultural products are not easily dissolved in water, so it is impossible to remove them simply by washing with water. In addition, a large amount of pesticides are a major cause of environmental pollution polluting the soil.

Recently, many studies have been conducted on the use of ozone to remove these residual pesticides.

Most conventional techniques are related to dissolving ozone in water to wash vegetables or fruits using so-called ozone water. Utility Model Registration No. 20-216131 connects an ozone generator to a washing water supply line to supply ozone with washing water. Patent Application Publication No. 2003-7245 discloses a method of washing vegetables by washing with ionized water in ozone water at a concentration of 3 ppm, and Utility Model No. 20-315960 is provided on a vibrating mesh board. It is a device that can accumulate vegetables, spray ozone water, and control the concentration of ozone.

However, in such a case, ozone dissolved in water may return to the atmosphere, or there is no separate ozone treatment device, and it is inevitable to release ozone harmful to the human body. The treatment to prevent the release into the atmosphere is very important.

In addition, there is a problem that the treatment apparatus is large by treating ozone with water, and its treatment efficiency is low, making it difficult to apply commercially.

On the other hand, Korean Utility Model Registration No. 20-297010 relates to a food sterilization device having a purification tank for injecting ozone gas into the sterilization device in the form of a gas, and at the rear thereof, purifying the discharged ozone gas using a vacuum pump. There is a problem that it is difficult to expect a complete purification of the ozone discharged from the design or the purification tank.

There are various methods of treating ozone, but among them, a method using a manganese oxide catalyst is known to be effective.

The present inventors have already applied for an invention on a manganese oxide catalyst prepared using potassium permanganate through the application No. 10-2003-30145, and the manganese oxide catalyst developed using potassium permanganate has a fine particle catalyst. It is distributed uniformly in the sieve, and the efficiency is much superior to the conventional manganese oxide catalyst.

The present invention has been devised to include a microwave function, and has been devised to solve the above-mentioned problems of the prior art, and treats pesticides remaining on the surface of agricultural products in a short time using ozone, and at the same time sterilizes them. The purpose of the unused ozone is to provide a residual pesticide treatment method and apparatus for treating with an ozone treatment catalyst.

1 is a block diagram illustrating a processing method of the present invention;

2 is an internal view of the treatment apparatus of the present invention;

3 is an external view of the treatment apparatus of the present invention.

4 is an external perspective view of the treatment apparatus of the present invention.

<Description of the symbols for the main parts of the drawings>

One ; Container 2; Ozone generator 3; Ozone Exhaust Department

5; Circulating fan 6; Exhaust valve 8; Ozone Treatment Catalyst

10; Ozone treatment fan 11; Ozone sensor 23; Operation switch

24; Exhaust switch 25; Timer 26; Ozone indicator

27; Operation display window

In order to achieve the above technical problem, the present invention comprises the steps of: depositing an untreated material in a closed space of a microwave oven; Introducing and circulating the ozone generated from the ozone source into the sealed space and reacting with the residual pesticide; It provides a sterilization and residual pesticide treatment method using ozone, characterized in that for treating the exhaust gas remaining ozone using an ozone treatment catalyst.

In the present invention, the step of treating the exhaust gas provides a sterilization and residual pesticide treatment method using ozone, characterized in that using a manganese oxide ozone treatment catalyst.

In addition, the present invention provides a method for treating sterilization and residual pesticides using ozone, characterized in that by continuously detecting the concentration of ozone in the step of treating the exhaust gas to stop the treatment of the exhaust gas when ozone falls below a certain concentration.

On the other hand, the present invention is a box-type container that can be sealed in the microwave; An ozone generator (2) installed at an upper side of the inside of the container; A plurality of ozone discharge units (3) installed in the longitudinal direction from the ozone generator via a pipe; A gas discharge passage provided at opposite ends of the container with an ozone discharge fan, and an ozone treatment fan at a rear side of the upper exhaust valve; The intermediate portion of the gas discharge passage is provided with an ozone treatment catalyst to provide a sterilization and residual pesticide treatment apparatus using ozone, characterized in that for treating the exhaust gas remaining ozone.

In addition, the present invention provides a sterilization and residual pesticide treatment apparatus using ozone, characterized in that the upper center of the container is further provided with a circulation fan 10 for increasing the reaction rate by the ozone is diffused.

In addition, the ozone treatment catalyst employed in the present invention provides a sterilization and residual pesticide treatment apparatus using ozone, characterized in that the manganese oxide and potassium oxide coexist.

In addition, the present invention provides a sterilization and residual pesticide treatment apparatus using ozone, further comprising an ozone sensor for detecting the concentration of ozone in the upper inside of the container.

In addition, the present invention provides a sterilization and residual pesticide treatment apparatus using ozone, further comprising a timer for setting the treatment time of the object on the outer front of the container.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

1 is a flowchart of a processing method of the present invention.

The method of the present invention consists of two stages: a first step of treating a to-be-processed object such as fruits and vegetables with pesticide remaining on the surface of ozone, and a second step of treating the remaining ozone.

In the first step, the workpiece is first placed in a closed space. Because ozone is used, a closed space is essential.

Thereafter, ozone generated from a normal ozone generating source is introduced into an enclosed space in which the object is stored. At this time, the introduced ozone reacts with the residual pesticides to remove the pesticides on the surface of the object through the reaction and also sterilize. The ozone generator can be applied by the silent discharge method or the photochemical reaction method using an ultraviolet lamp, which is most used in the industrial field. The silent discharge method is most commonly used in industrial sites. The interior of the discharge tube made of glass or ceramic becomes a high voltage electrode, and the part where the coolant outside contacts the ground electrode becomes a ground electrode. Corona discharge occurs between the ground electrodes and when oxygen or air is introduced in this interval, ozone is generated. The photochemical reaction method is the same as the method of generating ozone in the stratosphere, and when ozone is irradiated with ultraviolet rays of 175 to 255 nm, the dissociated oxygen atoms and oxygen molecules react to generate ozone. The photochemical reaction method is advantageous for the production of low-capacity ozone, and the silent discharge method is advantageous when producing a large-capacity ozone. In the present invention, depending on the object to which the space sterilizer is applied, the photochemical reaction method can be applied in the case of a small space, and the ozone generator of the silent discharge method can be installed in the larger space.

In order to improve the reaction rate, a fan may be used to circulate ozone in a closed space.

Ozone has 6 times the sterilizing power and oxidizing power than chlorine used for tap water sterilization, and can easily treat bacteria, viruses, etc. present in the air. In general, UV sterilization is the most widely used method of air sterilization. However, since the ultraviolet sterilization method has a sterilizing effect only within the effective range reached by the ultraviolet light, the sterilizing effect is relatively low compared to ozone because the application range is limited. Generally, more than 90% of the causes of food spoilage and deterioration in the food manufacturing process are caused by Chubu bacteria and falling bacteria. In this case, when 1.2 ppm of ozone is introduced into the manufacturing process, the airborne bacteria of the food processing plant are 62% treated and sterilized within 5 minutes, and show more than 86% sterilization effect within 30 minutes. Ozone shows excellent performance in the treatment of pesticides remaining in agricultural products in agricultural products or agricultural chemicals. Generally, chlorine pesticides, organophosphorus pesticides, phenokee clock pesticides, carbamate pesticides, urea pesticides, and phenolic pesticides, which are known to cause visual impairment, delirium, heart failure, genetic variation, and tumor induction, are 1 to 80 ppm. Treatment with ozone is known to remove more than 90% of pesticide residues. Ozone acts on the double bond of residual pesticides and converts harmlessly through various reactions such as oxidation reaction, ring opening of aromatic compounds and oxidation of side chain sites. Parathion, an organophosphorus pesticide, is easily converted to paraoxone when treated with 3 ppm of ozone. At this time, ozone decomposes the S = P bond of parathion, and even in the case of malathion, another organophosphorus pesticide, the S = P bond is converted to P = O bond and converted into harmless maloxon as follows. Residual pesticides will be removed.

C10H14O5PS (parathione) + O3 ----> C10H14O6P (paraoxone)

C10H19O6PS2 (malathion) + O3 -----> C10H19O7PS (malaoxone)

After circulating ozone for a certain period of time to react with the object to be treated, stop the operation of the ozone generator and proceed to step 2.

In the second step, after the reaction is completed, ozone remaining in the exhaust gas is treated.

The exhaust gas generated in the reaction is inhaled by installing a fan, passed through an ozone treatment catalyst, and the exhaust gas passed back to a closed place is circulated to continuously remove ozone from the exhaust gas.

At this time, the concentration of ozone is continuously detected, and ozone is removed from the exhaust gas, and when ozone falls below a certain concentration, the treatment of the exhaust gas is stopped.

In addition, the ozone treating catalyst may be any catalyst, but in particular manganese oxide, and vanadium oxide, copper oxide, silver oxide, cerium oxide, lanthanum oxide, and the like are added as ingredients to enable activated carbon, silica, alumina, zeolite, and the like. It is preferable that it is supported on and manufactured. In the method of preparing such a manganese oxide catalyst, potassium permanganate is first dissolved in distilled water, a metal nitrate selected from at least one of copper nitrate, cerium nitrate, zinc nitrate, and lanthanum nitrate is prepared and dissolved in an aqueous solution of potassium permanganate. At this time, the concentration of potassium permanganate or metal nitrate, which can be changed depending on the final product, is preferably about 20 ~ 200g / L. This is because crystals precipitate at 200 g / l or more, and are unsuitable at 20 g / l or less because the amount of metal supported is too small. When potassium permanganate and metal nitrate are completely dissolved, the solution is impregnated with a carrier selected from activated carbon, activated alumina, activated silica, zeolite, diatomaceous earth and cordierite honeycomb. After a certain period of impregnation, the solution is removed by filtration and the carrier is dried. At this time, the drying temperature and time depends on the type of carrier, and typically 5 to 10 hours at 50 to 150 ° C. is preferable because the drying time is too long at 50 ° C. or lower, and potassium permanganate is more than 150 ° C. Because it starts to decompose. The dried manganese oxide is obtained through a calcination step, and a final manganese oxide catalyst body is obtained. The calcination temperature and time also depend on the type of the carrier. Usually, 3 to 10 hours is preferable at 150 to 600 ° C. This is because potassium permanganate is not converted to manganese oxide and potassium oxide at 150 ° C. or lower, and is explosive. In the manganese oxide catalyst prepared by the above-described method, fine manganese oxide and potassium oxide are distributed on the surface of the catalyst body, and when another metal nitrate is added, the manganese oxide catalyst is converted into a metal oxide and mixed with manganese oxide. Since manganese oxide and potassium oxide thus obtained are very small particles of atomic scale, fine and uniformly distributed particles on the entire surface of the carrier can be obtained. This surface structure makes it possible to effectively decompose residual ozone. The ozone decomposition catalyst material used in the ozone decomposer relating to the present invention (the same applicant as the present invention in the patent application) used a catalyst prepared by the above-described preparation method.

The decomposition principle by the ozone decomposition catalyst is decomposed by the following reaction in the presence of a manganese oxide catalyst.

2O3 + MnO2-> 3O2 + MnO2 ------------ (1)

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the apparatus and operation of the present invention will be described in detail with reference to the drawings.

3 is a conceptual diagram of the apparatus of the present invention, for example, the installation method of a fan, an exhaust valve, etc., according to a conventional method, and a detailed description thereof is omitted.

An ozone generator 2 is installed on the upper side of the sealable microwave oven 1 and a plurality of ozone discharge units 3 are provided through a tube so that ozone can be uniformly discharged from the ozone generator 2 over an upper and lower length. Is installed.

At the bottom of the microwave oven 1, a processing container 4 on which the object is to be placed is placed. In the upper center, ozone is diffused inside the container 1 so that a circulation fan 5 may be mounted to increase the reaction speed. have.

On the opposite side of the ozone exhaust section 3 of the microwave oven 1, gas exhaust passages 7 having exhaust valves 6 and 9 are provided at both ends, respectively, and an ozone treatment fan 10 behind the upper exhaust valve 6. Is installed to suck the exhaust gas, and the sucked exhaust gas treats the exhaust gas in which ozone remains in the ozone treatment catalyst 8 provided in the middle portion of the gas discharge passage 7, and the exhaust gas returns the exhaust valve 9 at the lower end. It is returned to the inside of the container 1 and circulated.

The ozone sensor 11 is installed inside the microwave oven container 1 so that the ozone indicator lights when the ozone reacts inside the microwave container 1, and the circulated exhaust gas is treated to increase the concentration of ozone. When the concentration falls below a certain concentration, the ozone sensor 11 detects this and turns off the light of the ozone indicator to signal that the container 1 may be opened. The ozone sensor may use one of a semiconductor type, a thermal conductivity type, an absorption method or an electrochemical sensor.

The ozone treating catalyst 8 may be used as long as it is a catalyst capable of decomposing ozone, but in particular, the catalyst prepared in the above-described method for preparing a manganese oxide catalyst may have a more preferable effect.

3 is a conceptual diagram showing an external operation panel portion of the apparatus of the present invention.

The front of the microwave oven container 1 is provided with a door 21 and a power switch 22 for storing or carrying out the object.

The operation switch 23 for operating the ozone generator 2 and the circulation fan 5 while the power is on and the exhaust switch for opening the exhaust valves 6 and 9 and operating the ozone treatment fan 10 after the reaction is completed. There is 24.

There is a timer 25 for appropriately setting the reaction time between the object and ozone. When the reaction is completed, the process of switching on the exhaust switch 24 to the ozone treatment operation is automatically performed when ozone in the exhaust gas is turned on. When the concentration falls below a certain concentration, the ozone indicator 26 is turned off by the ozone sensor 11 and the container 1 can be opened.

The operation display window 27 may be manufactured as an LCD window to display the current work. 4 is an overall perspective view of the treatment apparatus of the present invention.

According to the present invention, the microwave microwave oven, which is widely used in general homes, is equipped with an ozone generator and an ozone treatment unit, and thus, cooking, sterilization, and pesticide treatment may be performed in a single apparatus, and thus the apparatus has various application ranges. The gaseous ozone removes pesticides and sterilizes fruit or vegetables with residual pesticides, which reduces the cost and lowers the cost of treatment. It can completely remove harmful ozone. After this sterilization treatment, microwaves can be used for simple cooking.

Claims (10)

In the method of processing a fruit or vegetable having a microwave function and a residual pesticide on the surface, Placing the workpiece in an enclosed space of the microwave oven; Introducing and circulating ozone generated from an ozone source into the sealed space and reacting with the residual pesticide to remove the residual pesticide; Sterilization and residual pesticide treatment method using ozone comprising the step of decomposing and removing the exhaust gas remaining ozone used in the removal of the residual pesticide using an ozone treatment catalyst. The method according to claim 1, The step of decomposing and removing the exhaust gas remaining in ozone is based on manganese oxide, and as an ingredient, one or more of vanadium oxide, copper oxide, silver oxide, cerium oxide, and lanthanum oxide is added to activated carbon and silica, alumina, and zeolite. Sterilization and residual pesticide treatment method using ozone comprising the step of passing the ozone decomposition catalyst material. The method according to claim 1, The step of decomposing and removing the remaining flue gas by ozone includes continuously detecting the concentration of ozone during processing of the flue gas and stopping the treatment of the flue gas when ozone falls below a certain concentration (almost zero). Sterilization and residual pesticide treatment method using ozone. Apparatus for processing fruits and vegetables with a microwave function and residual pesticides on the surface, A sealable box-shaped container (1) carrying the fruits and vegetables (or contents); An ozone generator (2) installed at an upper side of the inside of the container (1) to generate ozone for sterilization and residual pesticide treatment of the fruits and vegetables; An ozone discharge unit (3) installed in the longitudinal direction from the ozone generator (2) via a pipe to discharge ozone generated from the ozone generator; On the opposite side of the ozone discharge unit (3) of the container (1) is provided with an exhaust valve and a fan for sucking ozone, and after the sterilization and residual pesticide treatment with ozone generated in the ozone discharge unit to decompose the remaining ozone A gas discharge passage 7 installed for the purpose; An ozone treatment catalyst (8) for decomposing and treating ozone remaining in the exhaust gas in an intermediate portion of the gas discharge passage (7); Sterilization and residual pesticide processing apparatus using ozone, characterized in that it comprises an electronic control unit for controlling the ozone generator and ozone suction fan. The method according to claim 4, Sterilization and residual pesticide treatment apparatus using ozone, characterized in that the upper center of the container (1) is further provided with a circulation fan (5) to increase the reaction rate by diffusing ozone. The method according to claim 4 or 5, The ozone treatment catalyst (8) is a sterilization and residual pesticide treatment apparatus using ozone, characterized in that the manganese oxide catalyst. The method according to claim 4 or 5, Sterilization and residual pesticide treatment apparatus using ozone on the top of the container (1) further comprises an ozone sensor (11) for detecting the concentration of ozone present in the container. The method according to any one of claims 4 to 7, The ozone discharging unit using a ozone sterilization and residual pesticide processing apparatus, characterized in that it comprises a plurality of ozone outlet for injecting ozone evenly over a wider area. The method according to claim 4, The electronic control unit includes a timer 25 for setting a processing time of the object to be processed, a display unit for displaying the ozone concentration detected by the ozone detecting sensor and a necessary message, and a control button, and operate in conjunction with a microcomputer. Sterilization and residual pesticide treatment apparatus using ozone. The method according to claim 4, Process the sterilization and residual pesticides of the vegetables or fruits (contents) and decompose and remove the ozone remaining in the exhaust gas, and then operate directly without the user's manual operation, or cooking the user wants using a general microwave function Sterilization and residual pesticide treatment apparatus using ozone, characterized in that it further comprises a means for selecting.