CN220968704U - Photocatalytic reactor - Google Patents

Abstract

The utility model relates to the technical field of photo-thermal catalytic equipment, in particular to a photo-catalytic reactor, which comprises a heater, wherein a temperature control box is arranged on the heater, a reaction kettle is arranged in the temperature control box, an upper cover is arranged on the temperature control box, a quartz window is arranged at the top of the upper cover, and an air inlet, an air outlet, a standby port, a temperature sensor and a pressure buffer device are also arranged at the top of the upper cover; the reaction kettle is internally provided with a first catalyst load net, a second catalyst load net and a third catalyst load net from top to bottom respectively, wherein the aperture of the first catalyst load net is larger than that of the second catalyst load net, and the aperture of the second catalyst load net is larger than that of the third catalyst load net. The three-layer catalyst loading net arranged in the photocatalytic reactor ensures that the catalyst is uniformly spread, can achieve the effects of full contact between the solid catalyst and the reactant gas molecules in the whole kettle body and uniform illumination, and improves the reaction efficiency.

Description

A photocatalytic reactor

Technical Field

The utility model relates to the technical field of photothermal catalytic equipment, in particular to a photocatalytic reactor.

Background technique

The principle of photocatalysis is based on the redox ability of photocatalysts under light conditions, which can achieve the purpose of purifying pollutants, synthesizing and converting substances. Usually, photocatalytic oxidation reactions use semiconductors as catalysts and light as energy to degrade organic matter into carbon dioxide and water. Therefore, photocatalytic technology, as an efficient, safe and environmentally friendly environmental purification technology, has been recognized by the international academic community for improving indoor air quality.

The use of photothermal catalysts to convert carbon dioxide and hydrogen into hydrocarbons (i.e., methane and C2 ₊ products) has attracted the attention of many researchers in recent years because it can improve the utilization of solar energy, reduce carbon dioxide emissions, and produce value-added chemicals.

Photothermal carbon dioxide hydrogenation reaction is generally carried out in a kettle photothermal reactor. The solid catalyst and gas phase reactants are mixed in the kettle photothermal reactor for subsequent photothermal catalytic reaction. In the existing kettle photothermal reactor, the solid catalyst and gas phase reactants are mixed unevenly, which affects the reaction efficiency and the conclusion of the catalytic effect of the photothermal catalyst. In many cases, the gas reaction needs to be temperature controlled and can only react at a certain temperature. Therefore, a new type of kettle reactor is urgently needed to solve this problem.

Chinese patent CN207576137 U discloses a photocatalytic reactor for gas purification, comprising: a built-in light source and an inner-finned photocatalytic reaction container, wherein the inner-finned photocatalytic reaction container comprises a container body, an inner bracket, a light source support, a plurality of inner fins, an inlet pipe, an outlet pipe, an opening for inserting the built-in light source at the top, a fixing device and a wire joint, the inner fins on the same horizontal plane in the container body are distributed at intervals, and the upper and lower adjacent rows of inner fins are distributed alternately; the inlet pipe and the outlet pipe are respectively located on the upper and lower sides of the container body to facilitate the gas to flow through the entire container body; the built-in light source is located at the center of the container body, and the light emitted by the light source can irradiate the gas and the catalyst.

The photocatalytic reactor provided by the above patent has high photocatalytic efficiency, but is not suitable for gas reaction sites that require temperature control, and the control accuracy is not high.

Utility Model Content

In view of the deficiencies of the prior art, the purpose of the utility model is to propose a photocatalytic reactor for solving the problems of insufficient contact between solid catalysts and gas-phase reactants in kettle-type photothermal reactors in the prior art, and the need to control temperature and keep warm.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A photocatalytic reactor, comprising a heater, characterized in that: a temperature control box is arranged on the heater, a reaction kettle is arranged in the temperature control box, an upper cover is arranged on the temperature control box, a quartz window is arranged on the top of the upper cover, an air inlet, an air outlet, a spare port, a temperature sensor and a pressure buffer device are also arranged on the top of the upper cover;

The reactor is provided with a first catalyst-supporting net, a second catalyst-supporting net and a third catalyst-supporting net from top to bottom, respectively. The pore size of the first catalyst-supporting net is larger than that of the second catalyst-supporting net, and the pore size of the second catalyst-supporting net is larger than that of the third catalyst-supporting net.

Preferably, the meshes of the first catalyst-supporting mesh, the second catalyst-supporting mesh and the third catalyst-supporting mesh are grooved meshes, the grooves of the grooved meshes are arranged upward, and catalysts are placed in the grooves.

Preferably, the pressure buffer device comprises a pressure gauge buffer tube, one end of the pressure gauge buffer tube is connected to the upper cover, the other end of the pressure gauge buffer tube is connected to a pressure gauge, and the middle part of the pressure gauge buffer tube is also connected to an explosion-proof plate.

Preferably, the heater is provided with a display screen and control adjustment buttons.

Preferably, the quartz window is circular.

Preferably, a sealing ring is provided at the connection between the temperature control box and the upper cover.

Preferably, valves are installed on the air inlet, air outlet and spare port.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The photocatalytic reactor of the utility model is equipped with a heating furnace and a temperature control box, which can control the temperature required for the reaction in the reactor and keep it warm. A temperature sensor is provided for real-time monitoring, so the temperature control accuracy is high and the reaction effect is better.

(2) The photocatalytic reactor of the utility model is provided with a three-layer catalyst loading net for placing the catalyst. The apertures of the three-layer catalyst loading net are from large to small from top to bottom. Light can shine through the pores to the three-layer catalyst loading net. When the gas is introduced to react with the catalyst, the solid catalyst can be fully in contact with the reaction gas molecules in the entire reactor body and the light can be evenly irradiated, thereby improving the reaction efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a photocatalytic reactor proposed by the present invention;

FIG2 is a schematic diagram of the internal structure of a reactor of a photocatalytic reactor proposed by the present invention;

FIG3 is a schematic structural diagram of a catalyst-supporting network of a photocatalytic reactor proposed in the present invention;

FIG4 is a schematic diagram of the overall structure of a mesh of a photocatalytic reactor proposed by the present invention;

In the figure: Among them: 1. heater; 2. temperature control box; 3. reactor; 4. upper cover; 5. quartz window; 6. air inlet; 7. air outlet; 8. spare port; 9. temperature sensor; 10. first catalyst loading net; 11. second catalyst loading net; 12. third catalyst loading net; 13. pressure gauge buffer tube; 14. pressure gauge; 15. explosion-proof disk; 16. display screen; 17. control adjustment button.

Detailed ways

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Example

A photocatalytic reactor, comprising a heater 1, characterized in that: a temperature control box 2 is arranged on the heater 1, a reaction kettle 3 is arranged in the temperature control box 2, an upper cover 4 is arranged on the temperature control box 2, a quartz window 5 is arranged on the top of the upper cover 4, and an air inlet 6, an air outlet 7, a spare port 8, a temperature sensor 9 and a pressure buffer device are also arranged on the top of the upper cover 4;

The heater 1 heats the reactor 3 to control the temperature, and the temperature control box 2 keeps it warm. The temperature sensor 9 monitors the temperature of the reactor 3 in real time to ensure the temperature required for a full reaction in the reactor 3. The quartz window 5 arranged on the upper cover 4 has good light transmittance and provides a high-quality light source for photocatalytic catalysis. The air inlet 6 serves as a gas inlet, the air outlet 7 serves as a gas outlet, and the spare port 8 can be selected as a gas inlet or a gas outlet as needed.

The reactor 3 is provided with a first catalyst-supporting net 10, a second catalyst-supporting net 11 and a third catalyst-supporting net 12 from top to bottom. The pore size of the first catalyst-supporting net 10 is larger than that of the second catalyst-supporting net 11, and the pore size of the second catalyst-supporting net 11 is larger than that of the third catalyst-supporting net 12.

In this embodiment, the meshes of the first catalyst-supporting net 10 , the second catalyst-supporting net 11 and the third catalyst-supporting net 12 are grooved meshes, the grooves of which are arranged upward, and catalysts are placed in the grooves.

The mesh grooves of the first catalyst-loaded net 10, the second catalyst-loaded net 11 and the third catalyst-loaded net 12 are used to place catalysts in the grooves. Catalysts are placed in the three layers of catalyst-loaded nets, and the apertures of the three layers of catalyst-loaded nets decrease from large to small from top to bottom, so that the catalysts can better receive light. The setting of the three layers of catalyst-loaded nets makes the reaction of solid catalysts and gas molecules more uniform and the contact more sufficient, thereby improving the reaction efficiency.

In this embodiment, the pressure buffer device includes a pressure gauge buffer tube 13, one end of the pressure gauge buffer tube 13 is connected to the upper cover 4, the other end of the pressure gauge buffer tube 13 is connected to a pressure gauge 14, and the middle of the pressure gauge buffer tube 13 is also connected to an explosion-proof plate 15.

The pressure gauge 14 monitors the pressure in the reactor 3 in real time, and the explosion-proof disc 15 can prevent the risk of explosion due to excessive pressure.

In this embodiment, the heater 1 is provided with a display screen 16 and control adjustment buttons 17 .

In this embodiment, the quartz window 5 is circular.

In this embodiment, a sealing ring is provided at the connection between the temperature control box 2 and the upper cover 4.

The sealing ring ensures the airtightness of the reaction in the reactor 3.

In this embodiment, valves are installed on the air inlet 6, the air outlet 7 and the standby port 8.

The working principle of a photocatalytic reactor of the utility model is as follows:

Turn on the heater 1, heat the reactor 3 to a suitable temperature, keep it warm, place a photocatalyst on the catalyst loading net, cover it with the upper cover 4, introduce gas, aim the light source at the quartz window 5, and the gas molecules in the reactor 3 react with the photocatalyst. The setting of the catalyst loading net makes the catalyst distribution more uniform, which provides a good guarantee for the full contact between the gas molecules and the photocatalyst.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims (7)

1. A photocatalytic reactor, comprising a heater (1), characterized in that: a temperature control box (2) is arranged on the heater (1), a reaction kettle (3) is arranged in the temperature control box (2), an upper cover (4) is arranged on the temperature control box (2), a quartz window (5) is arranged on the top of the upper cover (4), and an air inlet (6), an air outlet (7), a spare port (8), a temperature sensor (9) and a pressure buffer device are also arranged on the top of the upper cover (4); The reactor (3) is provided with a first catalyst-supporting net (10), a second catalyst-supporting net (11) and a third catalyst-supporting net (12) from top to bottom, respectively; the pore size of the first catalyst-supporting net (10) is larger than the pore size of the second catalyst-supporting net (11), and the pore size of the second catalyst-supporting net (11) is larger than the pore size of the third catalyst-supporting net (12). 2. A photocatalytic reactor according to claim 1, characterized in that the meshes of the first catalyst-loaded net (10), the second catalyst-loaded net (11) and the third catalyst-loaded net (12) are grooved meshes, the grooves of the grooved meshes are arranged upward, and catalysts are placed in the grooves. 3. A photocatalytic reactor according to claim 1, characterized in that: the pressure buffer device includes a pressure gauge buffer tube (13), one end of the pressure gauge buffer tube (13) is connected to the upper cover (4), the other end of the pressure gauge buffer tube (13) is connected to a pressure gauge (14), and the middle part of the pressure gauge buffer tube (13) is also connected to an explosion-proof plate (15). 4. A photocatalytic reactor according to claim 1, characterized in that: a display screen (16) and control adjustment buttons (17) are provided on the heater (1). 5. A photocatalytic reactor according to claim 1, characterized in that: the quartz window (5) is circular. 6. A photocatalytic reactor according to claim 1, characterized in that a sealing ring is provided at the connection between the temperature control box (2) and the upper cover (4). 7. A photocatalytic reactor according to claim 1, characterized in that valves are installed on the air inlet (6), the air outlet (7) and the standby port (8).