A light-adjustable photoelectrocatalytic reactor

Abstract

The invention discloses a photoelectrocatalytic reactor with adjustable light. A top plate cover is fixed on the upper opening of the reactor. A plurality of luminous spherical lamps are built in the reactor. A feed inlet pipe is provided on one side wall of the reactor. A first control valve is installed on the feed inlet pipe. A sampling inlet pipe is provided on the other side wall of the reactor. A second control valve is installed on the sampling inlet pipe. An iron screening plate is installed on the inner wall of the reactor. Screen holes are evenly distributed on the iron screening plate. A solenoid is fixed on the outside of the bottom of the reactor. The solenoid is fixed on a bracket. The bracket is placed on a magnetic stirrer. A gas storage tank is passed into the reactor through an air pipe. The electrodes include a cathode and an anode. The cathode is connected to the negative pole of a power supply. The anode is connected to the positive pole of the power supply. The power supply is connected to the solenoid. The power supply is provided with buttons for controlling the on and off of the power supply of the electrode and the solenoid respectively. The structure is simple. Photoelectrocatalysis is realized to improve the catalytic efficiency through the synergy of power supply and photocatalysis. The light source of the whole device is provided by a quartz glass ball. The social and economic benefits are remarkable.

Description

Technical Field

[0001] The invention relates to a photoelectric catalytic reactor, in particular to a photoelectric catalytic reactor capable of adjusting light. Background Art

[0002] Photocatalysis refers to the process in which, when light with photon energy higher than the semiconductor absorption threshold is irradiated on a semiconductor, the valence band electrons of the semiconductor undergo inter-band transition, that is, transition from the valence band to the conduction band, thereby generating photogenerated electrons (e - ) and holes (h + At this time, the dissolved oxygen adsorbed on the surface of the nanoparticles captures electrons to form superoxide anions (·O 2- ), and the holes oxidize the hydroxide ions and water adsorbed on the catalyst surface into hydroxyl radicals (·OH). Superoxide anions and hydroxyl radicals have strong oxidizing properties and can oxidize most organic matter to the final product CO 2 and H 2 O, and can even completely decompose some inorganic substances. However, the quantum efficiency of the catalyst used in photocatalysis is low, and in order to improve the catalytic efficiency during the reaction, the catalyst is mixed with the reactant, which makes it difficult to separate, recover and reuse the catalyst, especially the ultrafine powder catalyst.

[0003] Photoelectrocatalysis is a new technology based on improving the traditional photocatalytic process. The catalyst is attached to the surface of the metal electrode, and the electrons generated by light excitation flow to the cathode through an external circuit by applying an external anode bias, reducing the probability of recombination of photogenerated electrons and holes, allowing more holes to exist in the system, thereby generating more ·OH, improving the efficiency of photons, and achieving the purpose of improving photocatalytic efficiency. However, traditional photocatalysis faces the difficulty of how to increase the light intensity and the catalyst may fall off during the reaction, flowing out with the liquid and causing resource waste. Therefore, there is an urgent need for a reactor that can quickly and efficiently realize catalytic reactions. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a light-adjustable photoelectrocatalytic reactor, which can effectively solve the problems of inability to increase light intensity, catalyst waste and low reaction efficiency in photocatalytic reactions.

[0005] To achieve the above purpose, the solution of the present invention is a photoelectrocatalytic reactor with adjustable light, comprising a reactor, a gas storage tank and electrodes, wherein the reactor is a hollow body with an upper opening, a top plate cover is fixed on the upper opening, a plurality of luminous spherical lamps are built into the reactor, a feed port pipe connected to the interior of the reactor is provided on the upper part of one side wall of the reactor, a first control valve is installed on the feed port pipe, a sampling port pipe connected to the interior of the reactor is provided on the lower part of the other side wall of the reactor, a second control valve is installed on the sampling port pipe, an iron sieve plate placed on the sampling port pipe is installed on the inner wall of the reactor corresponding to the sampling port pipe, sieve holes for filtering magnetic photocatalysts and magnetic photosensitizers are evenly distributed on the iron sieve plate, a solenoid is fixed outside the bottom of the reactor, the solenoid is fixed to a bracket by rivets, the bracket is placed on a magnetic stirrer, and the gas storage tank passes through the top plate cover through an air pipe into the reactor;

[0006] The electrode comprises a cathode and an anode, which are placed in a reaction kettle, the cathode is connected to the negative pole of a power source via an electrode lead, the anode is connected to the positive pole of a power source via an electrode lead, the power source is connected to the power input end of a solenoid via a wire, and buttons for controlling the on and off of the power of the electrode and the solenoid are provided on the power source.

[0007] The present invention has a simple structure and is easy to operate. It realizes photoelectrocatalysis and improves catalytic efficiency through the synergy of power supply and photocatalysis. The light source of the entire device is provided by a quartz glass ball, and the oxidant required for the entire reaction is provided by a gas storage tank, thereby realizing efficient catalysis without secondary pollution, and having significant social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention.

[0009] Figure 2 It is a structural schematic diagram of the luminous spherical lamp of the present invention. DETAILED DESCRIPTION

[0010] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings and specific circumstances.

[0011] In conjunction with the accompanying drawings, a light-adjustable photoelectrocatalytic reactor is provided, comprising a reactor, a gas storage tank and electrodes, wherein the reactor 1 is a hollow body with an upper opening, a top plate cover 3 is fixed on the upper opening, a plurality of luminous spherical lamps 2 are built into the reactor 1, a feed port pipe 4 connected to the interior of the reactor 1 is provided on the upper part of one side wall of the reactor 1, a first control valve 6 is installed on the feed port pipe 4, a sampling port pipe 5 connected to the interior of the reactor 1 is provided on the lower part of the other side wall of the reactor 1, a second control valve 7 is installed on the sampling port pipe 5, an iron sieve plate 8 placed on the sampling port pipe 5 is installed on the inner wall of the reactor 1 corresponding to the sampling port pipe 5, sieve channels for filtering magnetic photocatalysts and magnetic photosensitizers are evenly distributed on the iron sieve plate 8, a solenoid 9 is fixed to the outside of the bottom of the reactor 1, the solenoid 9 is fixed to the bracket 16 by rivets, the bracket 16 is placed on the magnetic stirrer 11, and the gas storage tank 10 passes through the top plate cover 3 through the air pipe into the interior of the reactor 1;

[0012] The electrodes include a cathode 13 and an anode 14, which are placed in a reactor 1. The cathode 13 is connected to the negative electrode of a power source 15 via an electrode lead, and the anode 14 is connected to the positive electrode of the power source 15 via an electrode lead. The power source 15 is connected to the power input end of the solenoid 9 via a wire, and buttons for controlling the power on and off of the electrode and the solenoid 9 are provided on the power source 15.

[0013] To ensure better implementation effects, the luminous spherical lamp 2 comprises a lampshade 203, a lamp tube 202 and a lamp holder 201. The lampshade 203 is a hollow spherical body made of transparent quartz glass. The lamp holder 201 is mounted at the lower portion of the lampshade 203. A sealing gasket 17 is mounted between the lampshade 203 and the lamp holder 201. The outer surface of the lampshade 203 is coated with a plurality of magnetic photosensitizers which are unevenly distributed at intervals. The lamp tube 202 is fixedly mounted in the lampshade 203 in a spiral shape. The lamp holder 201 is a hollow square body. A rechargeable battery 204 connected to the lamp tube 202 and a wireless receiving module 205 connected to the rechargeable battery 204 are mounted in the lamp holder 201.

[0014] The wireless receiving module 205 is a HSWG-LA wireless receiving module.

[0015] The diameter of the luminous spherical lamp 2 is 2-5 cm, and the thickness of the lampshade 203 is 0.2-0.5 cm.

[0016] The lamp tube 202 is an LED lamp tube, an ultraviolet lamp tube or an infrared lamp tube, but is not limited to these three types. Different lighting types are selected according to different experiments.

[0017] The solenoid 9 is composed of a metal core and multiple coils wound around the metal core.

[0018] The top cover 3 is provided with a plurality of through holes, and the gas pipe of the gas storage tank 10 and the electrode lead of the electrode respectively pass through the through holes on the top cover 3 and extend into the reactor 1. The contact points between the gas pipe and the electrode lead and the through holes on the top cover 3 are provided with sealing rings for sealing.

[0019] The reactor 1 is equipped with a temperature sensor 12 (a known commercial product), which is connected to a temperature display screen 12-1 (a known commercial product) placed outside the reactor 1 via a wire passing through a through hole on the top cover 3. A sealing ring is provided at the contact point between the wire and the through hole on the top cover 3 for sealing.

[0020] The cathode 13 and the anode 14 are attached with magnetic photocatalysts. The cathode 13 is a rod-shaped body made of titanium, and the anode 14 is a rod-shaped body made of conductive oxide.

[0021] The reactor 1 is a hollow body made of quartz glass with an opening at the top.

[0022] During the specific implementation of the present invention, the reaction solution is manually poured into the reactor 1 from the feed inlet pipe 4, and the first control valve 6 can be adjusted to adjust the amount of the reaction solution entering. The luminous spherical lamp 2 is equipped with a wireless receiving module, and the luminous spherical lamp 2 is turned on by an external remote control to provide a light source. At the same time, the heat dissipated by the light source can heat the device and accelerate the catalytic reaction. The button for controlling the electrode on the power supply 15 is turned on to energize the cathode 13 and the anode 14. The electrons generated by the anode 14 flow to the cathode 13 through the external circuit, so that there are more holes and electrons in the system. At the same time, the electrodes and catalysts can also inhibit the recombination of holes and electrons, accelerating the catalytic reaction. Then, according to the reaction needs, the gas storage tank 10 is opened to input into the reactor 1 through the gas pipe. Oxygen provides the oxidant required for the entire reaction. The temperature of the reaction device is monitored at any time by the temperature sensor 12. The magnetic stirring of the magnetic stirrer 11 during the reaction process fully allows the reaction materials to contact with oxygen, catalyst, photosensitizer and light source. When sampling is required, the button for controlling the solenoid 9 on the power supply 15 is turned on a few minutes in advance. The solenoid 9 provides a uniform magnetic field. The sampling port tube 5 is equipped with a second control valve 7 to control the output of the reaction solution. The reaction solution flows out through the sieve holes on the sieve plate 8. The sieve holes can filter the magnetic photocatalyst and magnetic photosensitizer in the water to prevent the photocatalyst and photosensitizer from flowing away with the liquid, thereby facilitating the reuse of the magnetic photocatalyst and photosensitizer, and ensuring the quality of the discharged liquid for subsequent determination.

[0023] The outer cover of the luminous spherical lamp 2 is a hollow sphere made of transparent quartz glass, which improves the transmittance and reduces the light loss rate. The internal lamp tube adopts a spiral shape to increase the luminous area and improve the light intensity. There is a gap between the lamp tube and the lampshade to facilitate the replacement of the lamp tube. The luminous spherical lamp 2 can choose different lighting types according to different experiments, and the light source type can be disassembled and replaced by itself. In addition to increasing or decreasing the number of luminous spherical lamps 2 in the reactor to control the light intensity, the light intensity can also be controlled by changing the position of the luminous spherical lamp 2 in the reactor. By changing the diameter and thickness of the luminous spherical lamp 2, the gravity and buoyancy of the luminous spherical lamp 2 are determined, so as to adjust the position of the luminous spherical lamp in the reactor to achieve the purpose of controlling the light intensity. When the luminous spherical lamp 2 is under balanced force, the gravity is equal to the buoyancy, and the density of the liquid is ρ 液 , the density of the spherical lamp is ρ 灯 , the total mass of the spherical lamp is recorded as m, R / r = [ρ 灯 / (ρ 灯 -ρ 液 )] 1 / 3 (R, r see attached Figure 2 ), the luminous ball lamp moves at a constant speed in the reactor; when R / r>[ρ 灯 / (ρ 灯 -ρ 液 )] 1 / 3 When the gravity is greater than the buoyancy, the luminous ball lamp sinks to the bottom of the reactor; when R / r<[ρ 灯 / (ρ 灯 -ρ 液 )] 1 / 3 When the gravity is less than the buoyancy, the luminous ball lamp floats on the upper part of the reactor solution and is not completely immersed; R / r≥[ρ 灯 / (ρ 灯 -ρ 液 )] 1 / 3 When the luminous spherical lamp is completely immersed in the reactor, sufficient light can be provided to accelerate the reaction, and the purpose of controlling the light intensity can be achieved according to different immersion degrees.

[0024] The force calculation formula of the luminous ball lamp is:

[0025] F 1 =F 2

[0026] Among them, F 1 , F 2 They are the gravity and buoyancy of the spherical lamp, unit: N;

[0027] F 1 =mg

[0028] Wherein, m is the mass of the spherical lamp, unit: kg;

[0029] F2 =ρ 液 V 2

[0030] Among them, ρ 液 is the liquid density, unit: kg / m 3 ; g = 10N / kg; V 2 The volume of water displaced by the spherical lamp, unit: m 3 ;

[0031]

[0032] Wherein, R is the outer radius of the spherical lamp, unit: m;

[0033] Right now

[0034] have to Among them, the mass m of the spherical lamp is:

[0035] m=ρ 灯 V 1

[0036] Among them, ρ 灯 The density of the ball lamp is calculated according to the density of the material of the ball lamp. The unit is kg / m 3 ; V 1 is the volume of the spherical lamp, unit: m 3 ;

[0037]

[0038] Where r is the inner radius of the spherical lamp, unit: m;

[0039] have to:

[0040] Finally, we get:

[0041] (1) Gravity ≥ buoyancy

[0042]

[0043] (2) Gravity < buoyancy:

[0044]

[0045] It should be pointed out that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession can make changes or modify the technical contents disclosed above into equivalent embodiments with equivalent changes without departing from the scope of the technical solution of the present invention, which all fall within the protection scope of the present invention.

[0046] The invention has a simple structure and is easy to operate. It includes photocatalysis, power supply, stirring and detection. Each device can be disassembled and cleaned, and is easy to install. Through the synergy of power supply and photocatalysis, photoelectrocatalysis is achieved to improve the catalytic efficiency. The power supply supplies power to the cathode, anode electrodes and the solenoid. The quartz glass ball provides the light source for the entire device. At the same time, the heat dissipated by the lamp source can heat the device, accelerate the catalytic reaction, and improve the catalytic efficiency by more than 40%. The oxidant required for the entire reaction is provided by a gas storage tank. The temperature of the reaction device can be monitored at any time by a temperature sensor. The magnetic photocatalyst and photosensitizer can be reused to achieve efficient catalysis without secondary pollution, and the social and economic benefits are remarkable.

Claims

1. A light-adjustable photoelectrocatalytic reactor, comprising a reactor, a gas storage tank and electrodes, characterized in that: The reactor (1) is a hollow body with an upper opening, a top plate cover (3) is fixed on the upper opening, a plurality of luminous spherical lamps (2) are built into the reactor (1), a feed inlet pipe (4) connected to the interior of the reactor (1) is provided on the upper part of one side wall of the reactor (1), a first control valve (6) is installed on the feed inlet pipe (4), a sampling inlet pipe (5) connected to the interior of the reactor (1) is provided on the lower part of the other side wall of the reactor (1), a second control valve (7) is installed on the sampling inlet pipe (5) The inner wall of the reaction kettle (1) corresponding to the sampling port tube (5) is provided with an iron sieve plate (8) placed on the sampling port tube (5), and sieve holes for filtering the magnetic photocatalyst and the magnetic photosensitizer are evenly distributed on the iron sieve plate (8). A solenoid (9) is fixed to the outside of the bottom of the reaction kettle (1), and the solenoid (9) is fixed to the bracket (16) by rivets. The bracket (16) is placed on the magnetic stirrer (11), and the gas storage tank (10) passes through the top plate cover (3) through the gas pipe and enters the interior of the reaction kettle (1); The electrode comprises a cathode (13) and an anode (14), the cathode (13) and the anode (14) are placed in a reaction kettle (1), the cathode (13) is connected to the negative electrode of a power source (15) via an electrode lead, the anode (14) is connected to the positive electrode of the power source (15) via an electrode lead, the power source (15) is connected to the power input end of the solenoid (9) via a wire, and buttons for controlling the power on and off of the electrode and the solenoid (9) are provided on the power source (15); The luminous spherical lamp (2) comprises a lampshade (203), a lamp tube (202) and a lamp holder (201); the lampshade (203) is a hollow spherical body made of transparent quartz glass; the lamp holder (201) is mounted at the lower part of the lampshade (203); a sealing gasket (17) is mounted between the lampshade (203) and the lamp holder (201); the outer surface of the lampshade (203) is coated with a plurality of magnetic photosensitizers which are unevenly distributed at intervals; the lamp tube (202) is fixedly mounted in the lampshade (203) in a spiral shape; the lamp holder (201) is a hollow square body; a rechargeable battery (204) connected to the lamp tube (202) and a wireless receiving module (205) connected to the rechargeable battery (204) are mounted in the lamp holder (201); The cathode (13) and the anode (14) are attached with a magnetic photocatalyst. The cathode (13) is a rod-shaped body made of titanium, and the anode (14) is a rod-shaped body made of a conductive oxide.

2. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The wireless receiving module (205) is a HSWG-LA wireless receiving module.

3. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The diameter of the luminous spherical lamp (2) is 2-5 cm, and the thickness of the lampshade (203) is 0.2-0.5 cm.

4. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The lamp tube (202) is an LED lamp tube, an ultraviolet lamp tube or an infrared lamp tube.

5. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The solenoid (9) is composed of a metal core and multiple coils wound around the metal core.

6. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The top plate cover (3) is provided with a plurality of through holes, and the gas pipe of the gas storage tank (10) and the electrode lead wire of the electrode respectively pass through the through holes on the top plate cover (3) and extend into the reactor (1). Sealing rings for sealing are provided at the contact points between the gas pipe and the electrode lead wire and the through holes on the top plate cover (3).

7. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The reactor (1) is equipped with a temperature sensor (12), which is connected to a temperature display screen (12-1) outside the reactor (1) via a wire passing through a through hole on the top cover (3), and a sealing ring for sealing is provided at the contact point between the wire and the through hole on the top cover (3).

8. The light-adjustable photoelectrocatalytic reactor according to claim 1, characterized in that: The reaction kettle (1) is a hollow body made of quartz glass with an opening at the top.

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