CN210065268U

CN210065268U - Advanced oxidation device for removing pesticide residues on fruits and vegetables

Info

Publication number: CN210065268U
Application number: CN201822188919.4U
Authority: CN
Inventors: 徐尚元; 康轩齐; 冯庆; 周小康; 万江凯
Original assignee: Xian Taijin Industrial Electrochemical Technology Co Ltd
Current assignee: Xian Taijin Xinneng Technology Co Ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2020-02-14
Anticipated expiration: 2028-12-25

Abstract

The utility model belongs to advanced oxidation technology application relates to a get rid of melon and fruit vegetables pesticide residue's advanced oxidation unit, include: one end of the oxidation device shell is provided with a water inlet, and the other end of the oxidation device shell is provided with a water outlet; the inside of the shell of the oxidation device is respectively provided with a melon, fruit and vegetable placing area and a reaction area connected with the melon, fruit and vegetable placing area; a circulating pressure pump is connected between the water inlet and the water outlet through a pipeline. This advanced oxidation unit, through the electrocatalysis of advanced oxidation subassembly, the active species who generates to have strong oxidizing property, under the effect of circulating pressure pump, the pesticide residue in melon and fruit vegetables disperses to the aqueous solution, is by active species oxidative decomposition to reach the purpose of getting rid of pesticide residue.

Description

Advanced oxidation device for removing pesticide residues on fruits and vegetables

Technical Field

The utility model belongs to advanced oxidation technology application relates to an advanced oxidation unit, especially relates to an get rid of melon and fruit vegetables pesticide residue's advanced oxidation unit.

Background

With the rapid development of economy in China, the living standard of people is higher and higher, people not only pay attention to the nutrient contents of melons, fruits and vegetables, but also pay more attention to the quality safety problem of melons, fruits and vegetables. At present, melons, fruits and vegetables are mostly planted in greenhouses, greenhouses and the like, and people use a large amount of pesticides in the prevention and treatment of diseases and insect pests of the melons, the fruits and the vegetables. To date, chemical pesticides have been produced in the world at an annual yield of approximately 200 million tons, and approximately 1000 or more synthetic compounds have been used as pesticides such as insecticides, fungicides, algicides, insecticides, defoliants, and the like. The pesticide, especially the organic pesticide, is applied in large amount, which causes serious pesticide pollution problem and becomes a serious threat to human health. Moreover, the problem of overproof pesticide residue in melons, fruits and vegetables is obvious due to continuous use of land and pesticides. The pesticide can be added into grains, vegetables, fruits, fish, shrimp, meat, eggs and milk to cause food pollution and harm human health. In general, organochlorine pesticides are metabolized slowly in human bodies and accumulate for a long time. Organic chlorine remains in the human body and is mainly concentrated in fat. For example, the content ratio of DDT in blood, brain, liver and fat tissue of a human is 1:4:30: 300; the dieldrin is 1:5:30: 150. Because pesticide residues are harmful to human beings and organisms, the application of pesticides is strictly managed in various countries, and the allowable amount of the pesticide residues in food is regulated. For example, in Japan, a registration system is applied to agricultural chemicals, and once it is confirmed that a certain agricultural chemical is harmful to humans and animals, the government restricts or prohibits the sale and use.

The residual pesticide in melons and fruits and vegetables has two residual forms: one is to keep the original chemical structure; the other remains in the form of its chemical conversion products or biodegradation products. Because of its chemical stability and biological toxicity, it is difficult to be mineralized completely by conventional oxidants including ozone, so the conventional ozone oxidation process cannot meet the treatment requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an get rid of melon and fruit vegetables pesticide residue's senior oxidation unit, under senior oxidation electrode subassembly's effect, constantly generate the hydroxyl free radical in the solution of continuous flow, simultaneously continuously get rid of melon and fruit vegetables's pesticide residue, at last with melon and fruit, vegetables and solution after pesticide residue gets rid of separately, solution continuation recycle does not have secondary pollution's problem.

In order to achieve the above object, the present invention provides the following technical solutions:

an advanced oxidation device for removing pesticide residues on fruits and vegetables, comprising: the device comprises an oxidation device shell, wherein one end of the oxidation device shell is provided with a water inlet, and the other end of the oxidation device shell is provided with a water outlet; a melon, fruit and vegetable placing area and a reaction area connected with the melon, fruit and vegetable placing area are respectively arranged in the shell of the oxidation device; and a circulating pressure pump is connected between the water inlet and the water outlet through a pipeline.

Furthermore, the reaction zone comprises a plurality of reaction tanks, the sides of the reaction tanks are provided with titanium conducting rods, and diaphragms are arranged inside the reaction tanks; the diaphragm divides the reaction tank into an upper area and a lower area, and an advanced oxidation electrode assembly is arranged in the area below the diaphragm.

Furthermore, the water inlet is connected with tap water through a water inlet pipeline, and a water inlet valve is arranged on the water inlet pipeline.

Further, get rid of melon and fruit vegetables pesticide residue's senior oxidation unit, still include the buffer pool, the delivery port still is connected with the buffer pool through the pipeline.

Furthermore, the buffer pool is connected with the water inlet through a pipeline and a circulating pressure pump, so that the recycling of the aqueous solution is realized.

Compared with the prior art, the utility model discloses following beneficial effect has: active species with strong oxidizing property are generated through the electrocatalysis of the advanced oxidation component, and pesticide residues in fruits and vegetables are dispersed into the aqueous solution and are oxidized and decomposed by the active species under the action of the circulating pressure pump, so that the aim of removing the pesticide residues is fulfilled.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic structural view of the advanced oxidation device for removing pesticide residues on fruits and vegetables provided by the present invention;

fig. 2 is a cross-sectional view of the reaction tank provided by the present invention.

Wherein: 1 is a water inlet; 2 is a melon, fruit and vegetable placing area; 3 is a reaction zone; 4 is the shell of the oxidation device; 5 is a water outlet; 6 is a circulating pressure pump; 7 is a titanium conductive rod; 8 is an advanced oxidation electrode assembly; 9 is a diaphragm; 10 is a reaction tank.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the following claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments.

Referring to fig. 1-2, the utility model provides an advanced oxidation device for removing pesticide residues on fruits and vegetables, comprising: the device comprises an oxidation device shell 4, wherein one end of the oxidation device shell 4 is provided with a water inlet 1, and the other end of the oxidation device shell 4 is provided with a water outlet 5; the inside of the shell 4 of the oxidation device is respectively provided with a melon, fruit and vegetable placing area 2 and a reaction area 3 connected with the melon, fruit and vegetable placing area 2; a circulating pressure pump 6 is connected between the water inlet 1 and the water outlet 5 through a pipeline.

Further, the reaction zone 3 comprises a plurality of reaction tanks 10, the sides of the reaction tanks 10 are provided with titanium conducting rods 7, and the reaction tanks 10 are internally provided with diaphragms 9; the diaphragm 9 divides the reaction tank 10 into an upper region and a lower region, and the advanced oxidation electrode assembly 8 is arranged in the lower region of the diaphragm 9.

Further, the water inlet 1 is connected with tap water through a water inlet pipeline, and a water inlet valve is arranged on the water inlet pipeline.

Further, this get rid of advanced oxidation unit of melon and fruit vegetables pesticide residue still includes the buffer pool, and delivery port 5 still passes through the pipeline and is connected with the buffer pool.

Furthermore, the buffer pool is connected with the water inlet 1 through a pipeline and a circulating pressure pump 6, so that the recycling of the aqueous solution is realized.

Because the oxidation-reduction potential of the traditional ozone is 2.07V, the traditional ozone has selectivity on organic pesticide residues, and organic pollutants cannot be mineralized completely; and the utility model provides a get rid of melon and fruit vegetables pesticide residue's senior oxidation unit, wherein the active species that senior oxidation electrode subassembly produced, the redox potential of hydroxyl free radical is 2.8V, and oxidizing power is extremely strong, can oxidize almost all organic matters, and can thoroughly mineralize the organic matter into CO₂And H₂And O. The generation of hydroxyl free radicals comes from high-efficiency electrocatalytic oxidation reaction, and the novel DSA anode or the titanium-plated Pt anode is adopted as the electrocatalytic oxidation reaction anode to generate a large amount of hydroxyl free radicals under the action of an external electric field, so that pesticide residual pollutants dispersed in a circulating system are degraded and removed. The pesticide residue mainly comprises some organic matters with stable structures, such as phenolic organic matters, and benzene rings exist in the chemical structures of the organic matters, so that the properties of the organic matters are very stable. Researchers used advanced oxidation units to degrade phenol and found that the degradation process of phenol is shown in fig. 1:

FIG. 1 phenol degradation pathway

The device not only can decompose and mineralize stable pesticide residue substances, but also has the sterilization and disinfection effects. In the process of cleaning vegetables, melons and fruits by using tap water, chloride ions contained in the tap water can generate hypochlorite with strong oxidizing property in the electrochemical reaction process; the anode also has an ozone-generating reaction. Ozone and hypochlorous acid have good fire extinguishing effect on microorganisms and bacteria. According to the reaction principle, the anode reacts as follows in the electrolytic process:

2Cl^--2e^-→Cl₂

Cl₂+H₂O→HClO+HCl

3H₂O-6e^-→O₃+6H⁺

OH^-the ions diffuse into the liquid layer around the anode and react further to produce chloric acid.

HClO+OH^-→H₂O+ClO^-

12ClO^-+6H₂O-12e→4HClO₃+8HCl+3O₂

Therefore, compared with other oxidation methods, the electrochemical advanced oxidation process has the following characteristics: (1) producing a large amount of very reactive OH, which is an intermediate product of the reaction and can induce the subsequent chain reaction; (2) OH is not selected to directly react with pesticide residues to degrade the pesticide residues into carbon dioxide, water and harmless salt, so that secondary pollution is avoided; (3) because it is a physical-chemical treatment process, it is easy to control to meet the treatment requirements; (4) the active species ozone, chloric acid and the like generated by the method have good inactivation effect on microorganisms and bacteria.

The utility model provides a get rid of melon and fruit vegetables pesticide residue's senior oxidation unit, when in-service use, its specific working process as follows: tap water is introduced into the water inlet 1, a proper amount of vegetables and fruits are placed in the fruit and vegetable placing area 2, and the water inlet valve is closed after the whole oxidation device is filled with the tap water. Then starting the power supply of the advanced oxidation assembly 8 and the circulating pressure pump 6 in the reaction area, generating active species (OH) with strong oxidation property under the electrocatalysis action of the advanced oxidation assembly 8, dispersing pesticide residues in vegetables and fruits into aqueous solution under the action of the circulating pressure pump 6, and oxidizing and decomposing the pesticide residues by the active species, thereby achieving the purpose of removing the pesticide residues.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An advanced oxidation device for removing pesticide residues on fruits and vegetables is characterized by comprising: the device comprises an oxidation device shell (4), wherein one end of the oxidation device shell (4) is provided with a water inlet (1), and the other end of the oxidation device shell is provided with a water outlet (5); a melon and fruit and vegetable placing area (2) and a reaction area (3) connected with the melon and fruit and vegetable placing area (2) are respectively arranged in the oxidation device shell (4); and a circulating pressure pump (6) is connected between the water inlet (1) and the water outlet (5) through a pipeline.

2. An advanced oxidation device for removing pesticide residues on fruits and vegetables according to claim 1, wherein said reaction zone (3) comprises a plurality of reaction tanks (10).

3. The advanced oxidation device for removing pesticide residues on fruits and vegetables according to claim 2, wherein a titanium conducting bar (7) is arranged at the edge of the reaction tank (10), and a diaphragm (9) is arranged inside the reaction tank (10); the membrane (9) divides the reaction tank (10) into an upper area and a lower area, and the area below the membrane (9) is provided with the advanced oxidation electrode assembly (8).

4. The advanced oxidation device for removing pesticide residues on fruits and vegetables according to claim 1, wherein the water inlet (1) is connected with tap water through a water inlet pipeline, and a water inlet valve is arranged on the water inlet pipeline.

5. The advanced oxidation device for removing pesticide residues on fruits and vegetables according to claim 1, further comprising a buffer pool, wherein the water outlet (5) is further connected with the buffer pool through a pipeline.

6. The advanced oxidation device for removing pesticide residues on fruits and vegetables according to claim 5, wherein the buffer tank is connected with the water inlet (1) through a pipeline and a circulating pressure pump (6).