Double-light-source photocatalytic wastewater degradation device

Abstract

The invention relates to the related technical field of wastewater treatment, in particular to a double-light-source photocatalytic wastewater degradation device which comprises an outer-layer tank body, a photocatalytic mechanism is arranged in the outer-layer tank body, and a mechanical catalytic mechanism is arranged in the outer-layer tank body. According to the device, the photocatalysis mechanism is arranged, the ultraviolet LED lamp belts and the blue light LED lamp belts are adopted, the ultraviolet LED lamp belts are arranged in a surrounding mode with the center axis of the inner-layer tank body as the circle center, the blue light LED lamp belts are embedded in the spiral lamp grooves, and the blue light LED lamp belts and the lamp grooves form a sliding rail structure, so that light rays can be evenly distributed in the device, it is guaranteed that all parts of waste water can fully receive illumination, and the waste water treatment effect is improved. In the mechanical catalysis mechanism, catalysis discs rotate and are arranged in six layers along a rotating shaft, the intervals are reasonable, stirring plates reversely move, a rotational flow plate strengthens rotational flow, turbulence shear force is generated by the wastewater under the combined action, the contact frequency and degree of the wastewater, the catalysis discs and a catalyst are increased, and the catalysis reaction is more sufficient in cooperation with a photocatalysis mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a dual-light-source photocatalytic wastewater degradation device. Background Art

[0002] With the enhancement of environmental awareness and the development of industrialization, wastewater treatment has become a key environmental protection issue. Traditional biological treatment methods have limited capabilities in treating wastewater containing difficult-to-biodegrade organic matter and often require the combination of physical or chemical pretreatment methods. As a green advanced oxidation technology, ultraviolet photocatalysis does not produce secondary pollution during the reaction process and is a promising wastewater treatment method. Moreover, most photocatalytic reaction devices use a single light source. Therefore, there is a particular need for a dual-light-source photocatalytic wastewater degradation device.

[0003] However, existing photocatalytic reactors have defects. The contact area between the catalyst and pollutants is small, the utilization rate of the catalyst is low, and the distribution is uneven. Small molecules in the water body are easily adsorbed on the surface of the catalyst, resulting in passivation phenomena, leading to poor stability of the catalytic system and unable to achieve high-efficiency catalytic effects.

[0004] In view of the above problems, a dual-light-source photocatalytic wastewater degradation device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-light-source photocatalytic wastewater degradation device to solve the existing dual-light-source photocatalytic wastewater degradation device mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A dual-light-source photocatalytic wastewater degradation device, including an outer tank body, a photocatalytic mechanism is arranged inside the outer tank body, a mechanical catalytic mechanism is arranged inside the outer tank body, and a tank cover is arranged on the top of the outer tank body;

[0007] The photocatalytic mechanism includes an inner tank body installed on the inner side of the outer tank body, an intermediate tank body is arranged between the outer tank body and the inner tank body, a heat preservation interlayer is filled between the outer tank body and the intermediate tank body, an ultraviolet LED light strip is installed between the inner tank body and the intermediate tank body, and a blue light LED light strip is built in the inner wall of the inner tank body;

[0008] The mechanical catalytic mechanism includes a catalytic disk installed above the bottom of the inner tank body, a stirring plate is arranged above the catalytic disk, and a swirling plate is arranged above the stirring plate.

[0009] Preferably, the photocatalytic mechanism further includes a sinking groove opened at the top of the inner tank body, a spiral lamp groove is arranged around the side of the intermediate tank body close to the inner tank body, a sealing gasket is arranged at the top of the sinking groove, and an annular pressing plate is arranged at the top of the sealing gasket.

[0010] Preferably, the blue light LED light strip is embedded in the inner wall of the spiral lamp groove, and the spiral lamp groove and the installation surface of the blue light LED light strip form a slide rail structure.

[0011] Preferably, the top connection end of the ultraviolet LED light strip is connected to the annular pressing plate, and the annular pressing plate is snap-connected to the inner layer of the tank.

[0012] Preferably, the ultraviolet LED light strip passes through the gasket and is installed on the inner wall of the inner layer of the tank through the annular pressing plate.

[0013] Preferably, both the middle layer of the tank and the outer layer of the tank are made of stainless steel, the inner layer of the tank is made of transparent quartz glass, and the heat preservation interlayer is filled with aerogel material.

[0014] Preferably, the ultraviolet LED light strip is arranged in a circle around the central axis of the inner layer of the tank, and a total of ten groups are provided.

[0015] Preferably, the mechanical catalytic mechanism further includes a first driving motor installed at the bottom of the outer layer of the tank, a stirring shaft is installed at the central connection point of the stirring plate, a rotating shaft is installed at the top output end of the first driving motor, a second driving motor is installed at the top connection end of the stirring shaft, and the second driving motor is installed on the top of the tank cover.

[0016] Preferably, the catalytic disc is sleeved on the surface of the rotating shaft, and six layers of the catalytic disc are installed along the central axis of the rotating shaft, and the distance between each layer is ten centimeters.

[0017] Preferably, the first driving motor drives the catalytic disc to rotate, and the second driving motor drives the stirring plate to move in the opposite direction.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The dual-light-source photocatalytic wastewater degradation device is provided with a photocatalytic mechanism, which uses an ultraviolet LED light strip and a blue light LED light strip. The dual-band light excites the catalyst, broadening the light response range. Different wavelengths of light can excite the catalyst to generate a variety of active species, which can more comprehensively attack the chemical bonds of pollutant molecules in the wastewater, improving the photocatalytic degradation efficiency. The ultraviolet LED light strip is arranged in a circle around the central axis of the inner layer of the tank in ten groups, and the blue light LED light strip is embedded in the spiral lamp groove and forms a slide rail structure with the lamp groove, which can make the light evenly distributed in the device, ensuring that all parts of the wastewater can fully receive light, avoiding the problem of insufficient local degradation, and improving the overall degradation effect;

[0020] In the mechanical catalytic mechanism, the catalytic disc rotates and six layers are arranged along the rotating shaft with a reasonable interval, the stirring plate moves in the opposite direction, and the swirl plate strengthens the swirl. Together, they make the wastewater generate turbulent shear force, increasing the contact frequency and degree of the wastewater with the catalytic disc and the catalyst, promoting the mass transfer of pollutants to the surface of the catalyst, and cooperating with the photocatalytic mechanism to make the catalytic reaction more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0022] Figure 2 is a schematic exploded view of the photocatalytic mechanism of the present invention;

[0023] Figure 3 is a schematic diagram of the connection structure between the blue LED strip and the spiral lamp groove in the photocatalytic mechanism of the present invention;

[0024] Figure 4 is a schematic diagram of the structure between the outer tank body, the inner tank body and the middle tank body of the present invention;

[0025] Figure 5 is a schematic sectional view of the mechanical catalytic mechanism of the present invention;

[0026] Figure 6 is a schematic diagram of the structure between the swirl plate and the rotating shaft in the mechanical catalytic mechanism of the present invention.

[0027] In the figures: 1. Outer tank body; 2. Photocatalytic mechanism; 201. Inner tank body; 202. Middle tank body; 203. Heat preservation interlayer; 204. Ultraviolet LED strip; 205. Blue LED strip; 206. Sinking groove; 207. Spiral lamp groove; 208. Sealing gasket; 209. Annular pressing plate; 3. Mechanical catalytic mechanism; 301. Catalytic disc; 302. Stirring plate; 303. Swirl plate; 304. First driving motor; 305. Stirring shaft; 306. Rotating shaft; 307. Second driving motor; 4. Tank cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention.

[0029] Embodiment

[0030] As Figures 1-4As shown in the figure, it includes an outer tank body 1. Inside the outer tank body 1, a photocatalytic mechanism 2 is provided, and a mechanical catalytic mechanism 3 is provided. At the top of the outer tank body 1, a tank cover 4 is provided. The photocatalytic mechanism 2 includes an inner tank body 201 installed on the inner side of the outer tank body 1. Between the outer tank body 1 and the inner tank body 201, an intermediate tank body 202 is provided. Between the outer tank body 1 and the intermediate tank body 202, a heat-insulating interlayer 203 is filled. Between the inner tank body 201 and the intermediate tank body 202, an ultraviolet LED light strip 204 is installed. Inside the inner wall of the inner tank body 201, a blue-light LED light strip 205 is built in. The photocatalytic mechanism 2 further includes a sunken groove 206 opened at the top of the inner tank body 201. On one side of the intermediate tank body 202 close to the inner tank body 201, a spiral lamp groove 207 is arranged in a surrounding manner. At the top of the sunken groove 206, a gasket 208 is provided. On the top of the gasket 208, an annular pressing plate 209 is provided.

[0031] It should be noted that in this embodiment, first, the pretreated wastewater is transported into the reactor, that is, inside the inner tank body 201, through the water inlet pipe at the top of the tank cover 4 by an external water pump. After the wastewater enters, it first passes through the swirl plate 303 installed on the tank cover 4 and forms a swirl. The formation of the swirl helps the wastewater to be more evenly distributed in the device, creating good conditions for subsequent reactions. Subsequently, the ultraviolet LED light strip 204 and the blue-light LED light strip 205 are turned on simultaneously. The ultraviolet LED light strip 204 is arranged in a surrounding manner with the central axis of the inner tank body 201 as the center, a total of ten groups. The blue-light LED light strip 205 is embedded in the spiral lamp groove 207 on the inner wall of the inner tank body 201. The light of the two bands irradiates the catalytic disc 301, activating the catalyst activity. The activated catalyst can undergo a photochemical reaction with the pollutants in the wastewater. Under the action of photocatalysis, the pollutants in the wastewater are continuously degraded. After a certain period of reaction, it can be discharged from the device through the drainage channel at the bottom of the outer tank body 1;

[0032] Among them, when maintaining the ultraviolet LED light strip 204, since the annular pressing plate 209 is snap-connected to the inner tank body 201 at the beginning, first disassemble the annular pressing plate 209. Since the bottom of the annular pressing plate 209 is connected to the ultraviolet LED light strip 204, when pulling out the annular pressing plate 209, the ultraviolet LED light strip 204 is pulled out from the inner tank body 201 together with the annular pressing plate 209. Then, pull out the ultraviolet LED light strip 204 passing through the gasket 208 from the gasket 208, and pay attention not to over-pull to prevent damage to the light strip circuit. At this time, after the ultraviolet LED light strip 204 is taken out, it can be maintained and replaced. When maintaining the blue-light LED light strip 205, since the blue-light LED light strip 205 is embedded in the inner wall of the spiral lamp groove 207 and the two form a slide rail structure, it can be carefully slid out from the spiral lamp groove 207 along the slide rail direction to be maintained and replaced;

[0033] Furthermore, the outer tank body 1 and the inner tank body 201 are hermetically connected and detachable, which is convenient for the maintenance and replacement of the light strip;

[0034] Moreover, the thermal insulation interlayer 203 filled between the outer tank body 1 and the middle layer tank body 202 is an aerogel filling material, which can effectively maintain the temperature stability inside the device, provide a suitable temperature environment for the photocatalysis and mechanical catalysis reactions, and is beneficial to improving the reaction efficiency.

[0035] As Figure 5 、 6 shown, the mechanical catalysis mechanism 3 includes a catalytic disk 301 installed above the bottom of the inner tank body 201. Above the catalytic disk 301, there is a stirring plate 302, and above the stirring plate 302, there is a swirl plate 303. The mechanical catalysis mechanism 3 also includes a first driving motor 304 installed at the bottom of the outer tank body 1. A stirring shaft 305 is installed at the central connection point of the stirring plate 302. The top output end of the first driving motor 304 is installed with a rotating shaft 306. The top connecting end of the stirring shaft 305 is installed with a second driving motor 307, and the second driving motor 307 is installed on the top of the tank cover 4.

[0036] It should be noted that in this embodiment, first, the first driving motor 304 at the bottom of the outer tank body 1 is started to drive the rotating shaft 306 to rotate, so that the catalytic disk 301 sleeved on the rotating shaft 306 rotates. The catalytic disk 301 is installed with six layers along the central axis of the rotating shaft 306, and the interval between each layer is ten centimeters. On the one hand, the rotating catalytic disk 301 increases the contact area with the wastewater, enabling more wastewater to fully contact with the catalyst; on the other hand, the mechanical force generated by its rotation can promote the adsorption and catalytic degradation process of the catalyst to the pollutants. Synchronously, the second driving motor 307 on the top of the tank cover 4 is started to drive the stirring shaft 305 and the stirring plate 302 to move in the opposite direction. The stirring plate 302 stirs the wastewater, causing turbulence in the device, further enhancing the contact frequency and degree between the wastewater and the catalytic disk 301 and the catalyst. At the same time, the swirl plate 303 above the stirring plate 302 further strengthens the swirling effect of the wastewater. Acting together with the stirring plate 302, the wastewater forms a complex flow field in the device, generating turbulent shear force. The turbulent shear force can destroy the agglomeration state of the pollutant particles, increase the contact opportunities between the pollutants and the catalyst and light, and can also promote the mass transfer process, accelerating the photocatalysis and mechanical catalysis reaction rates;

[0037] Among them, five catalytic disks 301 are grouped together, jointly installed on the connecting piece, and installed on the rotating shaft 306 through the connecting piece, and a group of catalytic disks 301 can be directly removed from the rotating shaft 306 for easy replacement.

[0038] The working principle of the present invention:

[0039] Refer to the attached instructions Figures 1-6, first, the pretreated wastewater is transported into the reactor, i.e., inside the inner tank body 201, through the water inlet pipe at the top of the tank cover 4 by an externally connected water pump. After the wastewater enters, it first passes through the swirl plate 303 installed on the tank cover 4 and forms a swirl. The formation of the swirl helps the wastewater to be more evenly distributed in the device, creating good conditions for subsequent reactions. Subsequently, the ultraviolet LED strip 204 and the blue light LED strip 205 are simultaneously turned on. The ultraviolet LED strip 204 is arranged in a circle around the central axis of the inner tank body 201, with a total of ten groups. The blue light LED strip 205 is embedded in the spiral lamp groove 207 on the inner wall of the inner tank body 201. The light of the two bands irradiates the catalytic disc 301, activating the catalyst activity. The activated catalyst can undergo a photocatalytic reaction with the pollutants in the wastewater;

[0040] Subsequently, the first drive motor 304 at the bottom of the outer tank body 1 is started to drive the rotating shaft 306 to rotate, causing the catalytic disc 301 sleeved on the rotating shaft 306 to rotate. The catalytic disc 301 is installed in six layers along the central axis of the rotating shaft 306, with a spacing of ten centimeters between each layer. On the one hand, the rotating catalytic disc 301 increases the contact area with the wastewater, enabling more wastewater to come into full contact with the catalyst; on the other hand, the mechanical force generated by its rotation can promote the adsorption and catalytic degradation process of the catalyst on the pollutants. Synchronously, the second drive motor 307 at the top of the tank cover 4 is started to drive the stirring shaft 305 and the stirring plate 302 to move in the opposite direction. The stirring plate 302 stirs the wastewater, generating turbulence in the device, further enhancing the contact frequency and degree between the wastewater and the catalytic disc 301 and the catalyst. At the same time, the swirl plate 303 above the stirring plate 302 further strengthens the swirl effect of the wastewater. Acting together with the stirring plate 302, a complex flow field is formed in the device, generating turbulent shear force. The turbulent shear force can break the agglomeration state of the pollutant particles, increase the contact opportunities between the pollutants and the catalyst and light, and also promote the mass transfer process, accelerating the photocatalysis and mechanical catalysis reaction rates;

[0041] The thermal insulation interlayer 203 filled between the outer tank body 1 and the intermediate tank body 202 is an aerogel filling material, which can effectively maintain the temperature stability inside the device, providing a suitable temperature environment for the photocatalysis and mechanical catalysis reactions and being conducive to improving the reaction efficiency;

[0042] Under the synergistic effect of the photocatalytic mechanism 2 and the mechanical catalytic mechanism 3, the pollutants in the wastewater are continuously degraded. After a certain period of reaction, they can finally be discharged from the device through the drainage channel at the bottom of the outer tank body 1.

[0043] Although embodiments of the present invention have been shown and described, the specific embodiments are merely explanations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations that do not make a creative contribution to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A dual-light-source photocatalytic wastewater degradation device, comprising an outer tank body (1), characterized in that: Inside the outer tank body (1), a photocatalytic mechanism (2) is provided. Inside the outer tank body (1), a mechanical catalytic mechanism (3) is provided. At the top of the outer tank body (1), a tank cover (4) is provided. The photocatalytic mechanism (2) includes an inner tank body (201) installed on the inner side of the outer tank body (1). Between the outer tank body (1) and the inner tank body (201), an intermediate tank body (202) is provided. Between the outer tank body (1) and the intermediate tank body (202), a heat-insulating interlayer (203) is filled. Between the inner tank body (201) and the intermediate tank body (202), an ultraviolet LED light strip (204) is installed. Inside the inner wall of the inner tank body (201), a blue-light LED light strip (205) is built in. The mechanical catalytic mechanism (3) includes a catalytic disc (301) installed above the bottom of the inner tank body (201). Above the catalytic disc (301), a stirring plate (302) is provided. Above the stirring plate (302), a swirl plate (303) is provided.

2. The dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The photocatalytic mechanism (2) further includes a sunken groove (206) opened at the top of the inner tank body (201). On the side of the intermediate tank body (202) close to the inner tank body (201), a spiral lamp groove (207) is arranged in a surrounding manner. At the top of the sunken groove (206), a sealing gasket (208) is provided. At the top of the sealing gasket (208), an annular pressing plate (209) is provided.

3. The dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The blue-light LED light strip (205) is embedded in the inner wall of the spiral lamp groove (207). The spiral lamp groove (207) and the installation surface of the blue-light LED light strip (205) form a slide rail structure.

4. A dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The top connection end of the ultraviolet LED light strip (204) is connected to the annular pressing plate (209), and the annular pressing plate (209) is snap-connected to the inner tank body (201).

5. A dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The ultraviolet LED light strip (204) passes through the sealing gasket (208) and is installed on the inner wall of the inner tank body (201) through the annular pressing plate (209).

6. The dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: Both the intermediate tank body (202) and the outer tank body (1) are made of stainless steel. The inner tank body (201) is made of transparent quartz glass. The heat-insulating interlayer (203) is an aerogel filling material.

7. A dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The ultraviolet LED light strip (204) is arranged in a surrounding manner with the central axis of the inner tank body (201) as the center of the circle, and there are a total of ten groups.

8. A dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The mechanical catalytic mechanism (3) further includes a first driving motor (304) installed at the bottom of the outer tank body (1). At the middle connection point of the stirring plate (302), a stirring shaft (305) is installed. At the top output end of the first driving motor (304), a rotating shaft (306) is installed. At the top connection end of the stirring shaft (305), a second driving motor (307) is installed, and the second driving motor (307) is installed on the top of the tank cover (4).

9. A dual-light-source photocatalytic wastewater degradation device according to claim 1, characterized in that: The catalytic disc (301) is sleeved on the surface of the rotating shaft (306), and the catalytic disc (301) is installed in six layers along the central axis of the rotating shaft (306), and the interval between each layer is ten centimeters.

10. A dual-light-source photocatalytic wastewater degradation device according to claim 8, characterized in that: The first drive motor (304) drives the catalytic disk (301) to rotate, and the second drive motor (307) drives the stirring plate (302) to move in the opposite direction.

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