CN111790336A - Novel multipoint photoreactor and application method thereof - Google Patents

Abstract

The invention provides a novel multipoint photoreactor and a using method thereof, and the multipoint photoreactor comprises a magnetic stirrer, a shell, a lampshade, a reactor and a circulating cooling water device, wherein the shell is a cylindrical outer cover which is covered outside the reactor, the magnetic stirrer is arranged at the bottom of the reactor and the shell, the two opposite sides of the reactor are respectively communicated with a water inlet pipe and a water outlet pipe, the other ends of the water inlet pipe and the water outlet pipe are respectively connected with a water inlet and a water outlet of the circulating cooling water device, the lampshade is transversely arranged above the reactor in the shell, a reaction lamp is arranged at the lower side of the lampshade, and the lampshade is vertically arranged on the shell in a sliding manner. By adopting multi-point magnetic stirring, multiple groups of experiments can be performed simultaneously, and errors are reduced; the light energy and the illumination intensity are controlled by changing the distance, and the illumination is uniform and is not influenced by stray light; the reaction device has simple structure and convenient use, and is suitable for photochemical reaction research of various media such as water, air, heavy metal, biology and the like. Belongs to the technical field of photoreaction.

Description

A new type of multi-point photoreactor and method of using the same

technical field

The invention provides a novel reactor and a using method thereof, belonging to the field of test reaction devices.

Background technique

Photochemical reaction refers to a chemical reaction that occurs when a substance absorbs photons under the irradiation of sunlight and makes the substance molecule in a certain electronic excited state, thereby causing a chemical reaction with other substances. Photochemical reactions are mainly divided into two categories: photosynthesis and photolysis. Compared with other chemical reactions, photochemical reactions have the characteristics of good selectivity, economical and practical, mild reaction conditions, and favorable control, and have a very important position in the field of chemistry.

At the end of the 18th century, people first proposed photosynthesis and began to study the effect of light on matter. In the 1980s, photochemical reactions developed rapidly, and picosecond, pulsed light sources, and pulsed laser technologies were introduced. At present, photochemical reaction research has become a hot spot in this era. For example, under the action of photochemical reaction, complex compounds are synthesized; under the action of photocatalysis, toxic and harmful organic substances are degraded; in clinical medicine, photochemical therapy is used to treat intractable diseases. With the in-depth study of photochemical reactions, it extends to the fields of synthesis technology, solar energy utilization, photofunctional materials, photobiochemistry and environmental photochemistry. Especially in the field of environmental chemistry, light can cause a series of photochemical reactions and phenomena, which are closely related to environmental pollution and pollution control. Photochemistry is an important part of environmental chemistry and a branch of environmental science. Using photochemistry to control the environment is an important method to control environmental pollution. In the study of the photochemical reaction process, the photochemical reactor is the key equipment in the photochemical production, and its performance plays an important role in the application of the photochemical reaction process.

Compared with other fields, photochemical research started late, the research depth is shallow, high-end and sophisticated photochemical research instruments and equipment are in short supply and expensive, so it is difficult to widely promote. The previous photochemical reactors have the following shortcomings: First, the previous photoreactors were mainly based on a single experiment, and multiple sets of experiments could not be carried out. If multiple sets of experiments were required, they needed to be carried out under different lamps. However, even if the same type of lamp has a certain degree of difference due to different use times and methods of use, for photochemical experiments that are particularly sensitive to light intensity, experimental errors may be unavoidable; the second is safety, due to the general design of the reactor. It is an open type, and when the reaction is carried out for a long time, the local temperature will rise. If you are not careful, the liquid will splash on the surface of the bulb, causing it to be partially cooled and smashed and burst. There is a certain risk. In addition, the temperature rises , it is easy to turn the reaction into a thermochemical reaction, which affects the experimental results; third, the previous photoreactors mostly use different lamps to obtain different light energies, which reduces the accuracy of the experiment; fourth, most of the current reaction devices take up space Large volume, not easy to move, weak illumination performance of the light source, small illumination area, difficult to irradiate uniformly, and poor applicability to the reaction vessel; Fifth, the photoreactor with the light source in the center needs to rotate to ensure uniform light, while the solution Or the suspension can only be stirred evenly by aeration, which is costly and complicated. Therefore, it is urgent to develop new photochemical reactors.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel multi-point photoreactor and a method for using the same, so as to solve the above-mentioned deficiencies of the existing photochemical reactors.

In order to solve the above problems, it is proposed to adopt such a new type of multi-point photoreactor, including a magnetic stirrer, a shell, a lampshade, a reactor and a circulating cooling water device. The agitator is arranged at the bottom of the reactor and the shell, the opposite sides of the reactor are respectively connected with a water inlet pipe and a water outlet pipe, and the other ends of the water inlet pipe and the water outlet pipe are respectively connected with the water inlet and outlet of the circulating cooling water device. A lampshade is arranged horizontally above the reactor, a reaction lamp is arranged on the lower side of the lampshade, and the lampshade is vertically slidably arranged on the outer shell.

In the aforementioned photoreactor, guide grooves are vertically opened on opposite sides of the outer shell, and screws are fixed in the horizontal direction at the corresponding guide grooves on the lampshade, and the screws are vertically slid in the corresponding guide grooves. And one end of the screw rod extends to the outside of the casing, and a positioning nut is fastened and fixed on the screw rod outside the casing, and the vertical position of the lampshade is limited by the friction between the positioning nut and the outer surface of the casing;

In the aforementioned photoreactor, the upper end of the reactor is provided with a plurality of reactor grooves for placing beakers;

In the aforementioned photoreactor, an openable sampling door is provided on one side of the lower part of the casing;

In the aforementioned photoreactor, the reactor has a square structure, and the outer shell is a square cylinder whose circumferential dimension is larger than that of the reactor.

The specific operation process is as follows:

1. Turn on the circulating cooling water device;

2. Turn on the reaction lamp and measure the average irradiance energy of the reaction device;

3. Mix several groups of arsenous acid and goethite suspension with a certain concentration, adjust the pH value, pour the prepared solution into a beaker, and put the beaker into the reactor groove in turn;

4. Turn on the magnetic stirrer to mix the solution evenly;

5. Collect samples at different times and measure the concentration of reactants or products.

Compared with the prior art, the present invention has the following advantages: firstly, multiple groups of experiments can be carried out under the same environmental condition, so as to improve the accuracy of the experiments and save time and cost; secondly, during the reaction of the solution, the intensity of illumination can be controlled at any time , time, the reaction solution is not affected by temperature, to ensure the uniformity of the reaction medium receiving light; the third is to control the light energy reaching the solution by changing the distance between the lampshade and the reaction solution placement device; the fourth is the temperature control of the reaction vessel, sample addition Operations such as sampling are not limited by photochemical reactors. Fifth, the price is cheap.

Description of drawings

Fig. 1 is the structural representation of the present invention;

FIG. 2 is a schematic structural diagram of the reactor in FIG. 1 .

Detailed ways

In order to make the description of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

Example

1 and 2, the present embodiment provides a novel multi-point photoreactor, including a magnetic stirrer 1, an outer shell 2, a lampshade 3, a reactor 7 and a circulating cooling water device 12, the outer shell 2 is located in a The cylindrical outer cover outside the reactor 7, the magnetic stirrer 1 is arranged at the bottom of the reactor 7 and the shell 2, the opposite sides of the reactor 7 are respectively connected with the water inlet pipe 5 and the water outlet pipe 6, and the water inlet pipe 5 and the water outlet pipe 6 are respectively connected. The other end is respectively connected with the water inlet and the water outlet of the circulating cooling water device 12 (both sides of the outer casing 2 are respectively provided with water inlet holes and water outlet holes for the water inlet pipe 5 and the water outlet pipe 6 to pass through), and the outer casing 2 is located in the reactor 7 A lampshade 3 is arranged horizontally above the upper part of the lamp, and the lampshade 3 can use the existing reaction lampshade, that is, a lamp board, a current stabilizer is installed on the upper part of the lamp board, and a reaction lamp is installed in the lower part of the lamp board. That is, the lampshade 3 is vertically slidably arranged on the casing 2 , and an openable sampling door 8 is opened on one side of the lower part of the casing 2 .

The opposite sides of the housing 2 are provided with guide grooves 4 in the vertical direction, and the corresponding guide grooves 4 on the lampshade 3 are fixed with screws 31 in the horizontal direction. One end of the screw rod 31 extends to the outside of the housing 2, and the positioning nut 15 is fastened and fixed on the screw rod 31 outside the housing 2, and the vertical position of the lampshade 3 is limited by the friction between the positioning nut 15 and the outer surface of the housing 2;

The reactor 7 is a hollow box-like structure, and the upper end of the reactor 7 is provided with a plurality of reactor grooves 14 for placing the beaker 13. The reactor 7 is a rectangular parallelepiped with a bottom area equal to the size of the magnetic stirrer. The experiment needs to design different numbers of reactor grooves 14, and place the beaker 13 in the reaction liquid placement groove 14; the reactor groove 14 is a cylinder, and the beaker 13 is higher than the reactor groove 14 for easy removal and placed, the outer shell 2 is a square cylinder whose circumferential dimension is larger than that of the reactor 7 .

In the novel photoreactor provided by the present invention, the circulating cooling water device 12 is turned on when in use, and the cooling water enters from the water inlet pipe 5, flows out from the water outlet pipe 6, and circulates continuously to keep the temperature in the reactor 7 unchanged; then according to the experimental design The required illumination intensity and light energy adjust the distance between the lampshade 3 and the reactor 7, and the shortest distance between the reaction solution and the lampshade 3 is 20cm, and the lamp board is energized; the reaction raw materials are placed in the beaker 13, and the sampling door 8 is opened, Put multiple groups of beakers 13 into the reactor groove 14, close the sampling door 8 to avoid light leakage; finally set up a magnetic stirrer 1, turn on the power switch, and the magnetic stirrer 1 starts to work.

The following takes the photo-oxidation process of arsenous acid in goethite suspension as an example, and the specific operation process of the device is as follows:

1. Turn on the circulating cooling water device 1;

2. Turn on the UV lamp (reaction lamp) and measure the average radiation energy of the reaction device;

3. Mix several groups of arsenous acid and goethite suspension with a certain concentration, adjust the pH value, pour the prepared solution into the beaker 13, and put the beaker 13 into the reactor groove 14 in turn;

4. Turn on the magnetic stirrer 1 to mix the solution evenly;

5. Collect samples at different times and measure the concentration of reactants or products.

It was found that the results of multiple groups of reactions carried out on the arsenous acid-containing solution under the same conditions had high reproducibility and small deviation, indicating that the device had good stability.

The above-mentioned embodiments are merely illustrative of the invention, and the description of the illustrative embodiments in the specification and the accompanying drawings should not limit the protection scope of the patent right.

The preferred specific embodiments and embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments and embodiments. Various changes are made under the premise of the inventive concept.

Claims (6)

1. a novel multi-point photoreactor, it is characterized in that: comprise magnetic stirrer (1), shell (2), lampshade (3), reactor (7) and circulating cooling water device (12), described shell (2) is a cylindrical outer cover that is placed on the outside of the reactor (7), the magnetic stirrer (1) is placed on the bottom of the reactor (7) and the outer shell (2), and the opposite sides of the reactor (7) are communicated respectively There is a water inlet pipe (5) and a water outlet pipe (6), and the other ends of the water inlet pipe (5) and the water outlet pipe (6) are respectively connected with the water inlet and outlet of the circulating cooling water device (12), and the inner casing (2) is located at the water inlet and outlet of the circulating cooling water device (12). A lampshade (3) is arranged horizontally above the reactor (7), a reaction lamp is arranged on the lower side of the lampshade (3), and the lampshade (3) is vertically slidably arranged on the casing (2). 2. A novel multi-point photoreactor according to claim 1, characterized in that: the opposite sides of the outer shell (2) are provided with guide grooves (4) along the vertical direction, and corresponding guide grooves (4) are provided on the lampshade (3) The grooves (4) are fixed with screws (31) in the horizontal direction, and the screws (31) are vertically slidably arranged in the corresponding guide grooves (4), and one end of the screw rods (31) extends to the end of the casing (2). Externally, a positioning nut (15) is fastened and fixed on the screw rod (31) outside the casing (2). 3 . The novel multi-point photoreactor according to claim 1 , wherein the upper end of the reactor 7 is provided with a plurality of reactor grooves ( 14 ) for arranging the beakers ( 13 ). 4 . 4 . The novel multi-point photoreactor according to claim 1 , wherein an openable sampling door ( 8 ) is opened on one side of the lower part of the casing ( 2 ). 5 . 5. A novel multi-point photoreactor according to claim 1, characterized in that: the reactor (7) is a square structure, and the outer shell (2) has a circumferential dimension larger than the circumferential dimension of the reactor (7). Square cylinder. 6. the using method of the multi-point photoreactor described in any one of claim 1-5, is characterized in that, concrete operation process is as follows: 1. Open the circulating cooling water device (1); 2. Turn on the reaction lamp and measure the average irradiance energy of the reaction device; 3. Mix several groups of arsenous acid and goethite suspension with a certain concentration, adjust the pH value, pour the prepared solution into the beaker (13), and put the beaker (13) into the reactor groove (14) in turn. )inside; 4. Turn on the magnetic stirrer (1) to mix the solution evenly; 5. Collect samples at different times and measure the concentration of reactants or products.

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