CN211586550U

CN211586550U - Improved photochemical reaction device

Info

Publication number: CN211586550U
Application number: CN201922118892.6U
Authority: CN
Inventors: 郑春苗; 赵婷; 裘文慧
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology; Southern University of Science and Technology
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-09-29
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a modified photochemical reaction device, including photochemical reactor, low temperature circulation water bath, photochemical reactor passes through a nitrogen cylinder of gas shunt connection. The photochemical reaction instrument comprises a base, a magnetic stirrer fixed on the base, a cold trap and a plurality of reaction tubes. The bottom of the cold trap is fixed on the magnetic stirrer, and the reaction tubes are fixed on the same circumference through flange plates to surround the cold trap at the center. The cold trap contains a mercury lamp that provides a light source. The low-temperature circulating water bath tank provides cooling water for the cold trap, so that the excessive temperature of the mercury lamp is avoided. The gas splitter is provided with a plurality of channels to ensure the nitrogen atmosphere required by the quenching reaction in each reaction tube; the nitrogen conditions were selected by a manual control valve on each diverter passage. The utility model discloses simple structure, easily operation can study the mechanism influence of different quenchers to the photodegradation reaction simultaneously.

Description

Improved photochemical reaction device

Technical Field

The utility model relates to a photochemical reaction instrument especially relates to a modified photochemical reaction device.

Background

Antibiotics are widely used in the fields of medicine, aquaculture and the like as one of the most widely used and most used medicines in the world. However, in addition to disease control effects, antibiotics also have toxic effects on other organisms, such as aquatic microorganisms, plants and animals, during use. The presence of antibiotics in the environment induces resistance in bacteria, which leads to an increasing effective dose of antibiotics that can kill bacteria, and thus to abuse.

Residual antibiotics in the environment can be removed by a variety of methods, among which photodegradation reactions are of interest due to their simplicity of operation and low cost.

Photodegradation generally refers to a decomposition reaction of organic substances caused by absorption of photons, and belongs to a photochemical reaction. The mechanism of the photodegradation reaction is mainly that molecules absorb light energy to become excited states to initiate various reactions. However, the reaction mechanism of photodegradation of antibiotics is influenced by various factors, and thus there are many obstacles in the mechanical research.

Experimental research shows that the degradation mechanism can be further studied by adding a quenching agent in the photodegradation reaction. Different quenching agents have different influences on the reaction mechanism, but the quenching reaction needs to be completed in the presence of nitrogen, so that the nitrogen atmosphere encloses an important influencing factor for researching the photodegradation reaction mechanism.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the above problems in the prior art, the present invention provides an improved photochemical reaction apparatus.

(II) technical scheme

In order to achieve the above object, the utility model discloses a main technical scheme include:

an improved photochemical reaction device comprises a photochemical reactor and a low-temperature circulating water bath, wherein the photochemical reactor is connected with a nitrogen cylinder through a gas splitter;

the gas splitter has a plurality of channels;

the photochemical reaction instrument comprises a base, a magnetic stirrer fixed on the base, a cold trap and a plurality of reaction tubes;

the bottom of the cold trap is fixed on the magnetic stirrer, the reaction tubes are fixed on the same circumference through a flange plate, the cold trap is fixed at the central position of the flange plate, and the cold trap is surrounded at the center by the reaction tubes; a mercury lamp is placed in the cold trap, and a power line of the mercury lamp is connected with a main machine of the photochemical reactor;

each channel of the gas splitter is connected with a PVC pipe, the PVC pipes are communicated into the corresponding reaction pipes, and the channels of the gas splitter correspond to the reaction pipes one to one.

The upper part of the cold trap is connected with a water outlet pipe, and the lower part of the cold trap is connected with a water inlet pipe; the water inlet pipe and the water outlet pipe are connected with the low-temperature circulating water bath tank; the cold trap is made of quartz.

Furthermore, the gas splitter is provided with 8 channels, and each channel is provided with a control valve which is manually switched.

(III) advantageous effects

The utility model has the advantages that: the photochemical reaction refitting device is simple and easy to operate, can ensure the nitrogen atmosphere when the antibiotics are subjected to photodegradation, and simultaneously, different quenchers are added into a reaction tube to further research the degradation mechanism of the antibiotics. The utility model discloses simple structure, easily operation both can be used as ordinary photochemical reaction appearance, can be used for studying multiple influence factor of antibiotic photodegradation mechanism again.

Drawings

FIG. 1 is a schematic structural diagram of an improved photochemical reaction apparatus;

fig. 2 shows a specific structure of the gas splitter.

[ description of reference ]

1: a nitrogen gas cylinder; 2: a gas splitter; 3: a photochemical reaction instrument; 4: a low-temperature circulating water bath; 5: cold trap; 6: a gas splitter channel; 7: a reaction tube; 8: a magnetic stirrer; 9: mercury lamps; 10: a base; 11: a water inlet pipe; 12: and (5) discharging a water pipe.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

An improved photochemical reaction device comprises a photochemical reactor 3 and a low-temperature circulating water bath 4, wherein the photochemical reactor 3 is connected with a nitrogen cylinder 1 through a gas splitter 2. The nitrogen bottle 1 provides necessary nitrogen atmosphere for the research of the antibiotic photodegradation reaction mechanism process.

The photochemical reaction instrument 3 comprises a base 10, a magnetic stirrer 8 fixed on the base, a cold trap 5 and a plurality of reaction tubes 7. The magnetic stirrer 8 makes the solution in the reaction tube 7 uniformly distributed, which is beneficial to the photochemical reaction.

The bottom of the cold trap 5 is fixed on the magnetic stirrer 8, a flange plate is arranged on the magnetic stirrer 8, the reaction tubes 7 are fixed on the same circumference through the flange plate, the cold trap 5 is fixed at the central position of the flange plate, and the cold trap 5 is surrounded at the center by the reaction tubes 7; the cold trap 5 is provided with a mercury lamp 9, and the power line of the mercury lamp 9 is connected with the main machine of the photochemical reaction instrument 3.

The upper part of the cold trap 5 is connected with a water outlet pipe 12, and the lower part of the cold trap is connected with a water inlet pipe 11; the water inlet pipe 11 and the water outlet pipe 12 are connected with the low-temperature circulating water bath 4; the cold trap 5 is made of quartz.

The mercury lamp 9 provides a required light source for photochemical reaction/photodegradation reaction, but the mercury lamp 9 generates heat to generate high temperature after being used for a long time, so that the temperature in the reaction tube 7 is influenced, the reaction is influenced, and the stability of experimental conditions in the whole reaction process is not facilitated. Therefore, the utility model adds the transparent quartz cold trap 5 outside the mercury lamp 9, on one hand, the circulating cooling water is continuously provided for the cold trap 5 through the low-temperature circulating water bath 4, and the temperature in the reaction tube 7 is ensured to be stable; on the other hand, since the cold trap 5 is made of transparent quartz, the intensity of the light source in the reaction tube 7 is not affected.

The gas splitter 2 has several channels 6. As shown in figure 2, the gas splitter is directly connected with the gas outlet of the nitrogen gas bottle 1 through the pipe orifice, and nitrogen is guided due to the arrangement of the channel 6 of the gas splitter.

Each channel 6 of the gas splitter 2 is connected with a PVC pipe, the PVC pipe is led into the corresponding reaction pipe 7, and each channel 6 of the gas splitter corresponds to the reaction pipe 7 one by one; each channel 6 of the multi-channel gas splitter is provided with a control valve which is manually switched on and off.

Each channel 6 of the gas splitter is externally connected with a thin tube, and then the thin tube is led into a reaction tube 7 to provide nitrogen required for quenching reaction. The manual control valve arranged on each channel 6 of the gas splitter can control the nitrogen introduction of each reaction tube according to requirements, and the required nitrogen atmosphere is ensured. Different quenchers are added into different reaction tubes 7, and quenching reaction occurs under the atmosphere of nitrogen, so that the reaction mechanism of the antibiotic photodegradation can be researched.

The above embodiments are only for explaining the present invention, and do not constitute the limitation of the protection scope of the present invention, and those skilled in the art can make various changes or modifications within the scope of the claims, all of which belong to the essence of the present invention.

Claims

1. An improved photochemical reaction device comprises a photochemical reactor (3) and a low-temperature circulating water bath (4), and is characterized in that the photochemical reactor (3) is connected with a nitrogen cylinder (1) through a gas splitter (2);

the gas splitter (2) has several channels (6);

the photochemical reactor (3) comprises a base (10), a magnetic stirrer (8) fixed on the base, a cold trap (5) and a plurality of reaction tubes (7);

the bottom of the cold trap (5) is fixed on the magnetic stirrer (8), the reaction tubes (7) are fixed on the same circumference through a flange plate, the cold trap (5) is fixed at the central position of the flange plate, and the cold trap (5) is surrounded at the center by the reaction tubes (7); a mercury lamp (9) is placed in the cold trap (5), and a power line of the mercury lamp (9) is connected with a main machine of the photochemical reactor (3);

every passageway (6) of gas shunt (2) all connect a PVC pipe, the PVC pipe leads to the correspondence in reaction tube (7), a plurality of passageways (6) of gas shunt with reaction tube (7) one-to-one.

2. The improved photochemical reaction apparatus of claim 1 wherein: the upper part of the cold trap (5) is connected with a water outlet pipe (12), and the lower part of the cold trap is connected with a water inlet pipe (11); the water inlet pipe (11) and the water outlet pipe (12) are connected with the low-temperature circulating water bath (4); the cold trap (5) is made of quartz.

3. Improved photochemical reaction device according to claim 1 or 2, characterized in that the gas splitter has 8 channels (6) and that a manually switched control valve is arranged in each channel (6) of the gas splitter.