Organic matter photocatalytic degradation device and system

Abstract

The present application discloses an organic matter photocatalytic degradation device and system, and relates to the technical field of organic wastewater treatment. The device comprises a reaction chamber and a water storage chamber, wherein a fluid inlet is arranged at the upper part of the reaction chamber, and the lower part of the reaction chamber is connected with the water storage chamber through a fluid channel, and a fluid outlet is arranged at the lower part of the water storage chamber, and the fluid outlet is higher than the fluid channel. The system comprises a plurality of organic matter photocatalytic degradation devices which are connected in sequence, and the reaction chamber is used to install a photocatalytic light source and store photocatalytic particles. Organic wastewater is introduced and gas is passed through the fluid inlet, so that sufficient oxygen can be provided for the photocatalytic particles and excess water near the photocatalytic light source can be taken away, and gas flows into the reaction chamber from the direction of the fluid outlet, so that the organic wastewater in the reaction chamber is pushed to roll and shift the photocatalytic particles and clean the outer wall of the photocatalytic light source, so that the organic matter in the organic wastewater is fully adsorbed and degraded, and the efficiency of photocatalytic degradation of organic matter is improved.

Description

Technical Field

[0001] This application relates to the technical field of organic wastewater treatment, and specifically relates to an organic matter photocatalytic degradation device and system.

Background Art

[0002] In the production processes of many chemical or pharmaceutical enterprises, some refractory organic wastewater is often generated. The chemical components in these organic wastewaters are complex and cannot be treated by conventional means. If directly discharged without treatment, it will cause serious pollution to the water environment and directly threaten human health. Therefore, the treatment of such organic wastewater has become one of the hotspots in the current environmental protection research field. Currently, the more commonly used methods for treating organic wastewater are incineration method, chemical precipitation method, and photocatalytic degradation method.

[0003] Among them, the incineration method is to oxidize and decompose the wastewater containing organic matter at high temperature to convert the organic matter into water, carbon dioxide, etc.; the chemical precipitation method generates ·OH free radicals by adding ferrous ions and hydrogen peroxide to the wastewater to achieve the degradation of organic matter. Although these two methods have a certain effect on reducing the COD of organic wastewater, when treating organic wastewater by the incineration method, some ash will remain on the inner wall of the incinerator during the incineration process, which causes relatively serious corrosion to the equipment, and the treatment cost is very high. While using the chemical dosing method will produce a large amount of precipitation, which is likely to cause secondary pollution.

[0004] The photocatalytic degradation method for treating organic wastewater is a new technology for treating organic wastewater that has emerged in the past ten years. Its basic principle is that under the illumination of a photocatalytic light source, the photocatalyst generates highly active photo-generated holes and photo-generated electrons, forming an oxidation-reduction system, and can generate ·OH free radicals with extremely strong oxidation ability in water, thereby oxidizing and decomposing the pollution components contained in the organic wastewater, making some difficult reactions proceed smoothly, so as to greatly improve the oxidation degradation rate. Compared with methods such as the incineration method and the chemical precipitation method, the photocatalytic degradation method structurally destroys the organic matter components and decomposes organic pollutants relatively more thoroughly, with advantages such as high efficiency, energy saving, environmental protection, and no secondary pollution.

[0005] When degrading organic wastewater, the photocatalyst needs to contact with organic matter, light, oxygen, and water at the same time to react. However, the traditional photocatalytic treatment method has the following problems: the photocatalytic light source can only irradiate the nearby photocatalyst, and the photocatalyst far from the photocatalytic light source cannot be fully irradiated, resulting in uneven illumination. In addition, due to the barrier of organic wastewater between the photocatalytic light source and the photocatalyst and the barrier of dirt precipitation on the outer wall of the photocatalytic light source, the light source is blocked, and there is no oxygen supplement in the traditional photocatalytic degradation method, resulting in an oxygen-deficient problem. The above problems cause low photocatalytic efficiency. Therefore, how to reasonably treat organic wastewater by the photocatalytic degradation method to improve the efficiency of the photocatalytic reaction is an urgent problem to be solved.

Summary of the Invention

[0006] This application provides an organic matter photocatalytic degradation device to solve the technical problem of low efficiency in the existing photocatalytic treatment of organic wastewater, thereby improving the degradation efficiency of photocatalytic organic wastewater.

[0007] Another object of this application is to provide an organic matter photocatalytic degradation system, which can fully adsorb and degrade organic matter in water, thereby improving the efficiency of the photocatalytic reaction.

[0008] To solve the above technical problems, this application adopts the following technical solutions:

[0009] An organic matter photocatalytic degradation device includes a reaction chamber and an intermediate chamber provided on one side of the reaction chamber. A fluid inlet is provided at the upper part of the reaction chamber, a fluid channel communicating with the intermediate chamber is provided at the lower part of the reaction chamber, a fluid outlet is provided at the lower part of the intermediate chamber, and the height of the fluid outlet is higher than that of the fluid channel.

[0010] For the organic matter photocatalytic degradation device as described above, the intermediate chambers are provided on both sides of the lower part of the reaction chamber and are connected through fluid channels.

[0011] For the organic matter photocatalytic degradation device as described above, the shape of the reaction chamber is generally wider at the top and narrower at the bottom.

[0012] An organic matter photocatalytic degradation system includes multiple layers of the above-mentioned organic matter photocatalytic degradation devices. In adjacent two layers of the organic matter photocatalytic degradation devices, the fluid outlet on the upper-layer organic matter photocatalytic degradation device corresponds to and communicates with the fluid inlet on the adjacent lower-layer organic matter photocatalytic degradation device.

[0013] For the organic matter photocatalytic degradation system as described above, a water inlet mechanism is provided on the organic matter photocatalytic degradation system. The water inlet mechanism communicates with the fluid inlet on the topmost organic matter photocatalytic degradation device and is used to introduce organic wastewater into the reaction chamber.

[0014] For the organic matter photocatalytic degradation system as described above, the water inlet mechanism includes a water inlet pipe communicating with the fluid inlet on the topmost organic matter photocatalytic degradation device and used to introduce organic wastewater, and a water distribution tank provided on the lower side of the water inlet pipe. A plurality of water distribution holes are provided on the water distribution tank at intervals and communicate with the fluid inlet on the topmost organic matter photocatalytic degradation device.

[0015] For the organic matter photocatalytic degradation system as described above, an air supply mechanism and a tumbling mechanism are provided on the organic matter photocatalytic degradation system;

[0016] The air supply mechanism is connected to the fluid inlet on the uppermost organic matter photocatalytic degradation device, and is used to introduce gas so that the gas passes through multiple layers of the organic matter photocatalytic degradation device from top to bottom in sequence;

[0017] The tumbling mechanism is connected to the fluid outlet on the lowermost organic matter photocatalytic degradation device, and is used to introduce gas so that the gas passes through the tumbling mechanisms of multiple layers of the organic matter photocatalytic degradation device from bottom to top in sequence.

[0018] For the organic matter photocatalytic degradation system as described above, the air supply mechanism includes an air supply pipe connected to the fluid inlet on the uppermost organic matter photocatalytic degradation device, an air supply pump connected to the air supply pipe, and a positive air blowing control system for controlling the air supply pump;

[0019] The back-blowing tumbling mechanism includes a tumbling pipe connected to the fluid outlet on the lowermost organic matter photocatalytic degradation device, a tumbling pump connected to the tumbling pipe, and a tumbling control system for controlling the tumbling pump.

[0020] For the organic matter photocatalytic degradation system as described above, the organic matter photocatalytic degradation system further includes a photocatalytic light source provided in the reaction chamber and photocatalytic particles for adsorbing and degrading organic matter.

[0021] For the organic matter photocatalytic degradation system as described above, the photocatalytic particles are nano-photocatalytic gel particles with a particle size of 0.01 - 10 mm.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows:

[0023] 1. An organic matter photocatalytic degradation device of the present application includes a reaction chamber and an intermediate chamber. A fluid inlet is provided at the upper part of the reaction chamber. The lower part of the reaction chamber is communicated with the intermediate chamber through a fluid channel. A fluid outlet is provided at the lower part of the intermediate chamber, and the fluid outlet is higher than the fluid channel. The reaction chamber is used for installing a photocatalytic light source and storing photocatalytic particles. Organic wastewater is introduced onto the photocatalytic particles through the fluid inlet. The gas introduced through the fluid inlet can provide sufficient oxygen for the photocatalytic particles, and the introduced gas can take away the excess moisture near the photocatalytic light source, enabling the photocatalytic particles adsorbed with organic matter to be degraded under sufficient light source irradiation and oxygen conditions, strengthening the oxidation treatment effect of the photocatalytic particles and increasing the oxidation degradation rate of pollutants. Periodically stop blowing air from the fluid inlet, and then introduce gas into the intermediate chamber in the reverse direction through the fluid outlet, and blow the organic wastewater from the intermediate chamber back into the reaction chamber through the fluid channel. Together with the organic wastewater in the reaction chamber, the photocatalytic particles are tumbled and displaced, removing the reacted photocatalytic particles near the photocatalytic light source, so that the photocatalytic particles farther away from the photocatalytic light source can be fully irradiated after being filled in, improving the use efficiency of the photocatalyst. At the same time, the organic wastewater is used to clean the outer wall of the photocatalytic light source through back blowing, maintaining the effective irradiation of the light source. The organic matter photocatalytic degradation device of the present application can fully adsorb and degrade the organic matter in the organic wastewater, improving the efficiency of photocatalytic degradation of organic matter.

[0024] 2. The organic matter photocatalytic degradation system of the present application includes multiple layers of organic matter photocatalytic degradation devices. The fluid outlet on the upper-layer organic matter photocatalytic degradation device is correspondingly connected to the fluid inlet on the lower-layer organic matter photocatalytic degradation device. After the organic wastewater enters through the fluid inlet on the topmost layer, it successively passes through multiple layers of organic matter photocatalytic degradation devices and is adsorbed and degraded layer by layer by the photocatalytic particles arranged on the reaction chamber. At the same time, gas is introduced through the fluid inlet on the topmost organic matter photocatalytic degradation device. The gas passes through multiple layers of organic matter photocatalytic degradation devices from top to bottom, providing sufficient oxygen for the photocatalytic particles on multiple layers of organic matter photocatalytic degradation devices. Moreover, the introduced gas can carry away the excess moisture near the photocatalytic light source, enabling the photocatalytic particles adsorbed with organic matter to be degraded under sufficient light source irradiation and oxygen conditions, strengthening the oxidation treatment effect of the photocatalytic particles, accelerating the oxidation degradation of pollutants. And gas is regularly introduced through the fluid outlet on the lowermost organic matter photocatalytic degradation device. The gas surges from bottom to top through the fluid outlet of each layer into the reaction chamber of each layer through the fluid channel, pushing the organic wastewater in the reaction chamber of each layer to tumble and displace the photocatalytic particles, removing the reacted photocatalytic particles near the photocatalytic particles, maintaining the radiation intensity of the photocatalytic light source, enabling the photocatalytic particles farther away from the photocatalytic light source to be fully irradiated after being supplemented, improving the use efficiency of the photocatalyst. At the same time, the organic wastewater is used to clean the outer wall of the photocatalytic light source through backwashing, maintaining the effective irradiation of the light source. By arranging multiple layers of successively connected organic matter photocatalytic degradation devices, the present application can fully adsorb and degrade the organic matter in the organic wastewater, improving the efficiency of photocatalytic degradation of organic matter.

[0025] 3. The organic matter photocatalytic degradation system of the present application is also provided with a water inlet mechanism, a gas supply mechanism and a tumbling mechanism. The organic wastewater is introduced into the reaction chamber through the water inlet mechanism from the fluid inlet on the topmost layer. The organic wastewater flows into the lower-layer organic matter photocatalytic degradation devices layer by layer through the air pressure difference, enabling the organic matter not adsorbed by the upper layer to be adsorbed and degraded layer by layer from top to bottom, improving the degradation effect of the system. The gas supply mechanism introduces gas from top to bottom through the fluid inlet on the topmost layer, providing sufficient oxygen for the photocatalytic particles, removing the moisture near the photocatalytic light source at the same time, increasing the radiation intensity, and strengthening the oxidation treatment effect of the photocatalytic particles. The tumbling mechanism introduces gas from bottom to top through the fluid outlet on the lowermost layer, removing the reacted photocatalytic particles near the photocatalytic light source, so that the gas tumbles the photocatalytic particles in the reaction chamber and cleans the outer wall of the photocatalytic light source, enhancing the radiation intensity of the light source and improving the efficiency of photocatalytic degradation of organic matter.

Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below.

[0027] Figure 1It is a schematic structural diagram of an organic matter photocatalytic degradation device of the present application.

[0028] Figure 2 It is a schematic principle diagram of an organic matter photocatalytic degradation device of the present application when gas is introduced from the fluid inlet 110.

[0029] Figure 3 It is a schematic principle diagram of an organic matter photocatalytic degradation device of the present application when gas is introduced from the fluid outlet 120.

[0030] Figure 4 It is a schematic structural diagram of an organic matter photocatalytic degradation system of the present application.

Specific Embodiments

[0031] 1. Please refer to Figures 1-4 , an organic matter photocatalytic degradation device, including a reaction chamber 11 and an intermediate chamber 12 provided on one side of the reaction chamber 11. A fluid inlet 110 is provided at the upper part of the reaction chamber 11, a fluid channel 100 communicating with the intermediate chamber 12 is provided at the lower part of the reaction chamber 11, a fluid outlet 120 is provided at the lower part of the intermediate chamber 12, and the height of the fluid outlet 120 is higher than the height of the fluid channel 100.

[0032] An organic matter photocatalytic degradation device of the present application includes a reaction chamber 11 and an intermediate chamber 12. A fluid inlet 110 is provided at the upper part of the reaction chamber 11. The lower part of the reaction chamber 11 is communicated with the intermediate chamber 12 through a fluid channel 100. A fluid outlet 120 is provided at the lower part of the intermediate chamber 12. During use, a photocatalytic light source 13 and photocatalytic particles 14 are installed in the reaction chamber 11. Organic wastewater can be introduced through the fluid inlet 110. Then, the organic wastewater falls on the photocatalytic particles 14 in the reaction chamber 11. Part of the organic matter is adsorbed and degraded by the photocatalytic particles 14 and is degraded under the photocatalytic action of the photocatalytic light source 13. The organic wastewater that is not adsorbed and degraded flows into the intermediate chamber 12 through the fluid channel 100 and then flows out from the fluid outlet 120. In the present application, the fluid outlet 120 is set higher than the fluid channel 100, so that the organic wastewater flowing in from the fluid inlet 110 can have sufficient contact time with the photocatalytic particles 14. Subsequently, the organic matter can be fully adsorbed and degraded by the photocatalytic particles 14. When the liquid level is higher than the fluid outlet 120, the organic wastewater flows out from the fluid outlet 120. At the same time, gas can be introduced into the reaction chamber 11 through the fluid inlet 110 to provide sufficient oxygen for the photocatalytic particles 14, and the introduced gas can take away the excess moisture near the photocatalytic light source 13 in the reaction chamber 11, so that the photocatalytic particles 14 adsorbed with organic matter can be degraded under sufficient light source irradiation and oxygen conditions, strengthening the oxidation treatment effect of the photocatalytic particles and improving the oxidation degradation rate of pollutants. Periodically stop blowing air from the fluid inlet, and then introduce gas into the intermediate chamber 12 through the fluid outlet 120 to blow the organic wastewater from the intermediate chamber 12 back into the reaction chamber 11 through the fluid channel, and roll and displace the photocatalytic particles 14 together with the organic wastewater in the reaction chamber 11, removing the reacted photocatalytic particles near the photocatalytic light source 13, so that the photocatalytic particles 14 farther away from the photocatalytic light source 13 can be fully irradiated by light after being supplemented, improving the use efficiency of the photocatalyst. At the same time, the organic wastewater can clean the outer wall of the photocatalytic light source 13 through back blowing, maintaining the effective irradiation of the light source. The organic matter photocatalytic degradation device of the present application can fully adsorb and degrade the organic matter in the organic wastewater, improving the efficiency of photocatalytic degradation of organic matter.

[0033] Both sides of the lower part of the reaction chamber 11 are provided with the intermediate chambers 12 communicated through the fluid channel 100. The purpose of this design is that the fluid can flow in or out through both sides of the lower part of the reaction chamber 11, increasing the fluidity to improve the rolling effect, and thus improving the photocatalytic efficiency.

[0034] The reaction chamber 11 is integrally shaped like a wide upper part and a narrow lower part. Preferably, it is an inverted trapezoid. The purpose of setting the side wall of the reaction chamber 11 to be inclined is that when gas is introduced, the inclined surface can improve the rolling effect, and at the same time, it is also convenient for the water flow to flow to clean the photocatalytic light source.

[0035] An organic matter photocatalytic degradation system includes multiple layers of the above-mentioned organic matter photocatalytic degradation devices. In adjacent two layers of the organic matter photocatalytic degradation devices, the fluid outlet 120 on the upper-layer organic matter photocatalytic degradation device corresponds to and communicates with the fluid inlet 110 on the adjacent lower-layer organic matter photocatalytic degradation device.

[0036] The organic matter photocatalytic degradation system of the present application includes multiple layers of organic matter photocatalytic degradation devices. The fluid outlet 120 on the upper-layer organic matter photocatalytic degradation device corresponds to and communicates with the fluid inlet 110 on the lower-layer organic matter photocatalytic degradation device. A reaction chamber 11 for installing a photocatalytic light source 13 and storing photocatalytic particles 14 is provided on the organic matter photocatalytic degradation device. After the organic wastewater enters through the fluid inlet 110 of the topmost layer, it sequentially passes through multiple layers of organic matter photocatalytic degradation devices and is adsorbed and degraded layer by layer by the photocatalytic particles 14 arranged on the reaction chamber 11 layer by layer. At the same time, a gas is introduced through the fluid inlet 110 of the topmost organic matter photocatalytic degradation device. The gas passes through multiple layers of organic matter photocatalytic degradation devices from top to bottom, providing sufficient oxygen for the photocatalytic particles 14 on multiple layers of organic matter photocatalytic degradation devices. And the introduced gas can take away the excess moisture near the photocatalytic light source 13, enabling the photocatalytic particles 14 adsorbed with organic matter to be degraded under sufficient light source irradiation and oxygen conditions, strengthening the oxidation treatment effect of the photocatalytic particles 14 and accelerating the oxidation degradation of pollutants. By regularly introducing a gas through the fluid outlet 120 of the lowermost organic matter photocatalytic degradation device, the gas rushes into the reaction chamber 11 of each layer from bottom to top through the fluid channel 100 from the fluid outlet 120 of each layer, pushing the organic wastewater in the reaction chamber 11 of each layer to tumble and shift the photocatalytic particles 14, removing the reacted photocatalytic particles 14 near the photocatalytic particles 14, maintaining the radiation intensity of the photocatalytic light source 13, enabling the photocatalytic particles 14 farther away from the photocatalytic light source 13 to be fully illuminated after being supplemented, improving the use efficiency of the photocatalyst. At the same time, the outer wall of the photocatalytic light source 13 is cleaned by back blowing with the organic wastewater, maintaining the effective irradiation of the light source. By arranging multiple layers of sequentially connected organic matter photocatalytic degradation devices, the organic matter in the organic wastewater can be fully adsorbed and degraded, improving the efficiency of photocatalytic degradation of organic matter.

[0037] An inlet mechanism 3 is provided on the organic matter photocatalytic degradation system. The inlet mechanism 3 communicates with the fluid inlet 110 on the topmost organic matter photocatalytic degradation device and is used to introduce organic wastewater into the reaction chamber 11. By introducing organic wastewater into the reaction chamber 11 from the fluid inlet 110 of the topmost layer through the inlet mechanism 3, the organic wastewater flows into the lower-layer organic matter photocatalytic degradation devices layer by layer by gravity and air pressure difference, enabling the organic matter not adsorbed by the upper layer to be adsorbed layer by layer from top to bottom, improving the degradation effect.

[0038] The water inlet mechanism 3 includes a water inlet pipe 31 that communicates with the fluid inlet 110 on the uppermost organic matter photocatalytic degradation device and is used to introduce organic wastewater, and a water distribution tank 32 provided on the lower side of the water inlet pipe 31. A plurality of water distribution holes are provided on the water distribution tank 32 at intervals and communicate with the fluid inlet 110 on the uppermost organic matter photocatalytic degradation device. By providing the water distribution tank 32, the introduced organic wastewater can be evenly spread on the photocatalytic particles 14, and at the same time, it is also convenient to control the water flow.

[0039] An air supply mechanism 4 is provided on the organic matter photocatalytic degradation system. The air supply mechanism 4 communicates with the fluid inlet 110 on the uppermost organic matter photocatalytic degradation device and is used to introduce gas so that the gas passes through multiple layers of the organic matter photocatalytic degradation devices from top to bottom in sequence. Through the air supply mechanism 4, gas can be introduced from top to bottom through the uppermost organic matter photocatalytic degradation device, providing sufficient oxygen for the photocatalytic particles 211, removing the moisture near the photocatalytic light source 13 at the same time, increasing the radiation intensity, and enhancing the oxidation treatment effect of the photocatalytic particles 14.

[0040] A tumbling mechanism 5 is provided on the organic matter photocatalytic degradation system. The tumbling mechanism 5 communicates with the fluid outlet 120 on the lowermost organic matter photocatalytic degradation device and is used to introduce gas so that the gas passes through the tumbling mechanism 5 of multiple layers of the organic matter photocatalytic degradation devices from bottom to top in sequence. Through the tumbling mechanism 5, gas can be introduced from bottom to top through the fluid outlet 120 on the lowermost organic matter photocatalytic degradation device, removing the reacted photocatalytic particles near the photocatalytic light source, tumbling the photocatalytic particles 14 in the reaction chamber 11 with the gas, and cleaning the outer wall of the photocatalytic light source 13, strengthening the radiation intensity of the light source.

[0041] The air supply mechanism 4 includes an upper intake pipe 41 communicating with the fluid inlet 110 on the uppermost organic matter photocatalytic degradation device, an upper air intake pump (not shown in the figure) connected to the upper intake pipe 41, and an upper air intake control system (not shown in the figure) for controlling the upper air intake pump; the tumbling mechanism 5 includes a lower intake pipe 51 communicating with the fluid outlet 120 on the lowermost organic matter photocatalytic degradation device, a lower air intake pump (not shown in the figure) connected to the lower intake pipe 51, and a lower air intake control system (not shown in the figure) for controlling the lower air intake pump. Preferably, when the air supply mechanism 4 and the tumbling mechanism 5 are operating, they are controlled regularly and at intervals through the upper air intake control system and the lower air intake control system. When the air supply mechanism 4 is enabled, the air flow passes through the multi-layer organic matter photocatalytic degradation devices from top to bottom in sequence and discharges air from the tumbling mechanism 5. Subsequently, sufficient oxygen is provided for the photocatalytic reaction of the photocatalytic particles 14. At the same time, the liquid level of the multi-layer organic matter photocatalytic degradation devices changes through the air supply mechanism 4, taking away the moisture near the photocatalytic light source 13, so that the moist photocatalytic particles 14 degrade the adsorbed organic matter under the conditions of sufficient oxygen and irradiation by the photocatalytic light source. By introducing gas through the tumbling mechanism 5, the air flow circulates upward along the connected multi-layer organic matter photocatalytic degradation devices and is discharged through the air supply mechanism 4. The organic wastewater remaining on the reaction chamber 11 is pushed by the gas to cause tumbling displacement of the photocatalytic particles 14, so that all the photocatalytic particles 14 can receive irradiation from the photocatalytic light source. At the same time, the organic wastewater is mixed and contacted with the photocatalytic particles 14 again sufficiently, further strengthening the adsorption of the photocatalytic particles 14 to the organic matter, and cleaning the outer wall of the photocatalytic light source 13 under the action of the tumbling mechanism 5, enhancing the light radiation intensity, strengthening the oxidation treatment effect of the photocatalytic particles 14, accelerating the oxidation degradation of pollutants, and greatly improving the oxidation degradation rate.

[0042] The organic matter photocatalytic degradation system further includes a photocatalytic light source 13 disposed in the reaction chamber 11 and photocatalytic particles 14 for adsorbing and degrading organic matter. Preferably, the photocatalytic light source 13 is an ultraviolet light source, and the ultraviolet light source radiation is used to enhance the oxidation treatment effect and accelerate the oxidation degradation of pollutants.

[0043] The photocatalytic particles 14 are nano-photocatalytic gel particles with a particle size of 0.01 - 10 mm. The gel particles used in this application have larger pores and are loaded with a semiconductor photocatalyst (such as nano-titanium dioxide), which further improves the adsorption capacity of organic substances and has better redox ability under the illumination of a photocatalytic light source, so as to achieve the purpose of degrading organic substances. Preferably, the preparation method of the photocatalytic particles 14 is to use acidic silica sol as the mother liquor and nano-titanium dioxide solution as the additive. The titanium dioxide solution is added to the acidic silica sol, and through stirring, the titanium dioxide fine particles are evenly distributed in the silica sol to form a gel, and after drying, it is coagulated to obtain the product.

[0044] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An organic matter photocatalytic degradation system, characterized in that: The invention comprises a multi-layer organic matter photocatalytic degradation device, wherein the organic matter photocatalytic degradation device comprises a reaction chamber (11), wherein the reaction chamber (11) is generally wide at the top and narrow at the bottom, wherein a fluid inlet (110) is provided at the top of the reaction chamber (11), and intermediate chambers (12) connected via a fluid channel (100) are provided at both sides of the lower part of the reaction chamber (11), wherein a fluid outlet (120) is provided at the lower part of the intermediate chamber (12), and the height of the fluid outlet (120) is higher than the height of the fluid channel (100); In two adjacent layers of the organic matter photocatalytic degradation devices, the fluid outlet (120) on the organic matter photocatalytic degradation device on the upper layer is correspondingly connected to the fluid inlet (110) on the organic matter photocatalytic degradation device on the adjacent lower layer; The organic matter photocatalytic degradation system is provided with a water inlet mechanism (3), an air supply mechanism (4) and a tumbling mechanism (5); The water inlet mechanism (3) is connected to the fluid inlet (110) on the uppermost layer of the organic matter photocatalytic degradation device, and is used to introduce organic wastewater into the reaction chamber (11); The gas supply mechanism (4) is in communication with the fluid inlet (110) on the topmost layer of the organic matter photocatalytic degradation device, and is used to introduce gas so that the gas passes through the multiple layers of the organic matter photocatalytic degradation device in sequence from top to bottom; The tumbling mechanism (5) is in communication with the fluid outlet (120) on the bottommost layer of the organic matter photocatalytic degradation device, and is used to introduce gas so that the gas passes through the multiple layers of the organic matter photocatalytic degradation device in sequence from bottom to top.

2. The organic matter photocatalytic degradation system according to claim 1, characterized in that: The water inlet mechanism (3) comprises a water inlet pipe (31) connected to the fluid inlet (110) on the topmost layer of the organic matter photocatalytic degradation device and used for introducing organic wastewater, and a water distribution trough (32) arranged at the lower side of the water inlet pipe (31), wherein the water distribution trough (32) is provided with a plurality of water distribution holes arranged at intervals and connected to the fluid inlet (110) on the topmost layer of the organic matter photocatalytic degradation device.

3. The organic matter photocatalytic degradation system according to claim 1, characterized in that: The air supply mechanism (4) comprises an air supply pipe (41) connected to the fluid inlet (110) on the uppermost layer of the organic matter photocatalytic degradation device, an air supply pump connected to the air supply pipe (41), and a positive air blowing control system for controlling the air supply pump; The tumbling mechanism (5) comprises a tumbling tube (51) connected to the fluid outlet (120) on the lowest layer of the organic matter photocatalytic degradation device, a tumbling pump connected to the tumbling tube (51), and a tumbling control system for controlling the tumbling pump.

4. The organic matter photocatalytic degradation system according to claim 1, characterized in that: The organic matter photocatalytic degradation system also includes a photocatalytic light source (13) arranged in the reaction chamber (11) and photocatalytic particles (14) used for adsorbing and degrading organic matter.

5. The organic matter photocatalytic degradation system according to claim 4, characterized in that: The photocatalytic particles (14) are nanometer photocatalytic gel particles with a particle size of 0.01-10 mm.

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