CN105668692A - Photocatalytic water treatment device capable of magnetically recovering catalyst and control method thereof - Google Patents

Abstract

The invention discloses a photocatalytic water treatment device for magnetic recovery catalyst and a control method thereof, belonging to the technical field of photocatalytic sewage treatment. The key points of the technical solution of the present invention are: a photocatalytic water treatment device for magnetically recovering catalysts. The inside of the box is divided into a reaction chamber and a light source chamber by a transparent baffle. There is a feeding port on the cover, a liquid inlet and a liquid outlet are respectively provided at the lower part of the reaction chamber, and an aeration device is provided at the bottom of the reaction chamber, and the aeration device is connected to the air compressor through a gas flow meter and a buffer bottle in turn. A plurality of solenoids surrounding the box are axially distributed on the outer side of the box, and coils are respectively wound on the solenoids. The invention realizes rapid separation and recovery of the magnetic photocatalyst by controlling the opening and closing of the coil control switch, the device structure and control principle are simple, the operation is simple and convenient, and the design cost is low.

Description

A photocatalytic water treatment device with magnetic recovery catalyst and its control method

technical field

The invention belongs to the technical field of photocatalytic sewage treatment, and in particular relates to a photocatalytic water treatment device for magnetic recovery catalyst and a control method thereof.

Background technique

With the rapid development of modern industry in the world, the discharge of refractory and persistent organic pollutants is becoming more and more serious. These organic pollutants widely exist in water, soil and atmospheric environment, only a small part can be degraded in nature, most of them are difficult to degrade in general treatment process, even if they can be degraded, most of them will cost a lot of money. , The processing speed is slow, the purification is not thorough, and it is easy to cause secondary pollution and other problems. Therefore, it has become a consensus to coordinate environmental protection, sustainable development, and explore new treatment technologies that are more economical, effective, and easy to promote and apply.

An important way to solve the above problems is photocatalytic oxidation technology. Photocatalytic reactions have broad and potential application prospects in the fields of chemical industry, energy and environmental air purification, fine ceramics, water purification, sterilization, deodorization and purification, energy batteries and gas sensor components.

In the water treatment problem, one of the difficulties is to deal with the organic pollutants that are harmful and difficult to degrade naturally. Because such pollutants are harmful to the environment and last for a long time, researchers have been looking for new materials to solve this problem. . As a kind of advanced technology, the photocatalytic oxidation method is based on the principle of using light to generate strong oxidants to completely oxidize organic pollutants into corresponding small molecules. The advantages of photocatalysts are very obvious. It has stable performance, non-toxicity and high activity; however, because its particle size is too small, it is not easy to recycle, and it is easy to agglomerate during use, resulting in reduced activity, unfavorable recycling and even secondary pollution.

In recent years, many researchers have carried out a large number of research experiments on how to realize the rapid and effective separation of magnetic catalysts, and invented many photocatalytic processes and methods for wastewater treatment, but there are still many defects. Among the currently widely used photocatalytic reactors, there is a lack of special reactors for magnetic catalysts. Usually, external magnets are needed to realize the separation and recovery of catalysts, and the separation efficiency is not ideal, which brings inconvenience to the operation.

With the continuous development of photocatalytic technology and the continuous invention and improvement of its processes and methods, it is of great practical significance to study a magnetically separable photocatalytic reactor and its control method.

Although the traditional photocatalytic reactor has improved the efficiency of photocatalytic reaction to a certain extent and achieved the goal of high efficiency of photocatalytic oxidation technology, however, its efficiency, energy saving, operation, reaction conditions, pollution conditions, etc. are still far from the actual situation. There is a certain gap in the demand for large-scale production applications. Especially in how to achieve effective separation of catalyst and treatment liquid, there is still the problem that the catalyst cannot be separated or is difficult to separate, and technical improvement is urgently needed.

Contents of the invention

The technical problem solved by the present invention is to provide a photocatalytic water treatment device and its control method for magnetically recovering catalysts, which introduce magnetism into the photocatalytic reactor in the form of an external electromagnetic field, and then realize the full play of the catalytic effect of the magnetic catalyst and its control method. The processing liquid is separated more quickly and efficiently.

In order to solve the above technical problems, the present invention adopts the following technical scheme, a photocatalytic water treatment device for magnetic recovery catalyst, including a box body and an upper cover, characterized in that: the inside of the box body is divided into a reaction chamber and a light source chamber by a transparent baffle , the inside of the light source chamber is provided with a light source, the light source is electrically connected to the power supply through the light source control switch, the upper cover opposite to the reaction chamber is provided with a feeding port, and the lower part of the reaction chamber is respectively provided with a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are respectively connected with a liquid inlet pipe and a liquid outlet pipe. An aeration device is installed at the bottom of the reaction chamber. The aeration device is connected to the air compressor through a gas flow meter and a buffer bottle in turn. The press control switch is electrically connected to the power supply. There are several solenoids surrounding the box along the axial direction on the outside of the box. The solenoids are respectively wound with coils. After the coils are connected in parallel, the coil control switch is connected to the power supply. Sexual connection, the outside of the box is coated with polyethylene coating.

The control method of the photocatalytic water treatment device for magnetic recovery catalyst according to the present invention is characterized in that the specific steps are: (1) Add the magnetic photocatalyst into the reaction chamber of the box from the feeding port, and the sewage passes through the inlet below the reaction chamber The liquid port is injected into the reaction chamber, and at the same time, the air compressor is turned on through the air compressor control switch to start aeration, the gas is discharged from the feeding port, and then the light source is turned on through the light source control switch to start photocatalytic degradation of sewage; (2) The photocatalytic reaction ends Finally, the coil is turned on through the coil control switch, and the coil generates a magnetic field to adsorb the magnetic photocatalyst to the inner wall of the reaction chamber, and then discharges the treated sewage from the liquid outlet at the bottom of the reaction chamber, completing a cycle process.

Compared with the prior art, the present invention has the following beneficial effects: 1. The rapid separation and recovery of the magnetic photocatalyst is realized by controlling the opening and closing of the coil control switch; 2. The equipment structure and control principle are simple, easy to operate and low in design cost; 3. , While maintaining the processing efficiency, reduce the loss of catalyst, simplify the experimental process, and promote the industrial application of photocatalytic technology.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. Light source, 2. Transparent baffle, 3. Feeding port, 4. Box, 5. Liquid inlet, 6. Liquid outlet, 7. Aeration device, 8. Gas flow meter, 9. Buffer Bottle, 10, air compressor, 11, coil, 12, polyethylene coating, 13, upper cover.

detailed description

The specific content of the present invention will be described in detail in conjunction with the accompanying drawings. A photocatalytic water treatment device for magnetically recovering catalysts, comprising a box body 4 and an upper cover 13, the inside of the box body 4 is divided into a reaction chamber and a light source chamber by a transparent baffle 2, and a light source 1 is arranged inside the light source chamber, the light source 1. The light source control switch is electrically connected to the power supply. The upper cover 13 opposite to the reaction chamber is provided with a feeding port 3. The lower part of the reaction chamber is respectively provided with a liquid inlet 5 and a liquid outlet 6. The liquid inlet 5 and the liquid outlet The inlet 6 is respectively connected with a liquid inlet pipe and a liquid outlet pipe, and an aeration device 7 is provided at the bottom of the reaction chamber. 10. The control switch of the air compressor is electrically connected to the power supply. There are a plurality of solenoids surrounding the box in the axial direction on the outside of the box 4. Coils 11 are wound on the solenoids. The coils 11 are connected in parallel and passed through The coil control switch is electrically connected to the power supply, and the outside of the box body 4 is coated with a polyethylene coating 12 .

The control process of the present invention is as follows: (1) Add the magnetic photocatalyst into the reaction chamber of the box from the feeding port, the sewage is injected into the reaction chamber through the liquid inlet below the reaction chamber, and at the same time, the air compressor is turned on by the air compressor control switch to start Aeration, the gas is discharged from the feeding port, and then the light source is turned on through the light source control switch to start photocatalytic degradation of sewage; (2) After the photocatalytic reaction is completed, the coil is turned on through the coil control switch, and the coil generates a magnetic field to adsorb the magnetic photocatalyst to the inner wall of the reaction chamber, and then the treated sewage is discharged from the liquid outlet at the lower part of the reaction chamber to complete a cycle process.

The above embodiments have described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What are described in the above embodiments and description are only to illustrate the principles of the present invention. Without departing from the scope of the principle of the present invention, there will be various changes and improvements in the present invention, and these changes and improvements all fall within the protection scope of the present invention.

Claims (2)

1. the photocatalytic water treatment device of a magnetic recovery catalyzer, comprise casing and upper cover, it is characterized in that: the inside of casing is separated into reaction chamber and light-source chamber by transparent baffle, the inside of light-source chamber is provided with light source, this light source is electrically connected by light control switch and power supply, cover on relative with reaction chamber and it is provided with charging opening, the bottom of reaction chamber is respectively equipped with fluid inlet and liquid outlet, fluid inlet and liquid outlet are connected to liquid-inlet pipe and drain pipe, the bottom of reaction chamber is provided with aerating apparatus, this aerating apparatus is connected with air compressor machine by gas meter and surge flask successively, air compressor machine is electrically connected by air compressor machine trip switch and power supply, the outside of casing is distributed with multiple solenoid coil being surrounded on casing vertically, this solenoid coil is wound with coil respectively, it is electrically connected by coil trip switch and power supply after coils from parallel connection of coils, the outside of casing scribbles polyethylene coating.

2. the control method of the photocatalytic water treatment device of a magnetic recovery catalyzer according to claim 1, it is characterized in that concrete steps are: magnetic photocatalyst is added the reaction chamber of casing by (1) from charging opening, sewage injects reaction chamber by the fluid inlet below reaction chamber, open air compressor machine by air compressor machine trip switch simultaneously and start aeration, gas is discharged by charging opening, then open light source by light control switch, start sewage is carried out photocatalytic degradation; (2) after light-catalyzed reaction terminates, by coil trip switch conducting coil, coil produces magnetic field and is adsorbed onto by magnetic photocatalyst on reaction chamber inwall, is then discharged from the liquid outlet of reaction chamber bottom by the sewage after process, completes a working cycle.