Photocatalysis device for waste gas treatment

Abstract

The photocatalytic device comprises a shell, a base is arranged at the bottom end of the shell, a gas inlet is formed in one end of the shell, a gas outlet is formed in the other end of the shell, and the shell is sequentially provided with a filtering module and a mixing module from the gas inlet to the gas outlet. Photocatalysis modules and ultraviolet lamp modules are sequentially and alternately arranged from the mixing module to the air outlet, an ozone generator is arranged on the side, close to the air inlet, of the shell, the ozone generator is connected with an air outlet pipe, and the air outlet pipe extends into the part, between the filtering module and the photocatalysis modules, of the shell. According to the photocatalytic device for waste gas treatment provided by the invention, ozone oxidation and photocatalytic technologies are combined together, and ozone is added into photocatalytic reaction as an oxidizing agent, so that the efficiency of separating light residual electrons from holes is greatly improved, the catalytic performance is enhanced, and the capability of decomposing pollutants is improved.

Description

Technical Field

[0001] The present invention belongs to the field of waste gas purification devices, and in particular relates to a photocatalytic device for waste gas treatment. Background Art

[0002] Today, environmental pollution has become a global issue that needs to be addressed urgently, among which air pollution is one of the most prominent problems in my country. With the rapid development of the economy, the emission of polluting waste gas has continued to increase. These waste gases often contain difficult-to-degrade organic matter, which has carcinogenic, teratogenic, and toxic hazards and is difficult to treat. Photocatalytic technology has attracted widespread attention due to its green and non-toxic characteristics. Photocatalytic technology mainly refers to the generation of electron-hole pairs inside the catalyst under the irradiation of ultraviolet light or visible light, thereby generating free radicals such as hydroxyl radicals and superoxide radicals on the catalyst surface, and then oxidizing and decomposing organic matter in contact with the catalyst into small molecular inorganic substances such as carbon dioxide and water. Although photocatalytic technology has many advantages, not only can it decompose most organic matter, but it is also highly safe, but its reaction rate will be limited when treating organic pollutants with high concentrations. At present, the catalytic efficiency of photocatalytic devices is low, the reaction speed is slow, and the waste gas treatment efficiency is low. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention discloses a photocatalytic device for exhaust gas treatment, comprising a shell, a base is provided at the bottom end of the shell, an air inlet is provided at one end of the shell, and an air outlet is provided at the other end of the shell, the shell is provided with a filter module and a mixing module in sequence from the air inlet to the air outlet, and a photocatalytic module and an ultraviolet lamp module are alternately provided in sequence from the mixing module to the air outlet, an ozone generator is provided on the side of the shell close to the air inlet, the ozone generator is connected to an outlet pipe, and the outlet pipe extends to the inside of the shell between the filter module and the photocatalytic module.

[0004] Preferably, the filtering module, mixing module, photocatalytic module and UV lamp module are all installed in the housing in a drawer-type structure for easy installation. A sealing structure, which can be a sealing strip, is also provided between the drawer-type structure and the housing to ensure the airtightness of the entire device.

[0005] Preferably, the air outlet pipe is provided with a plurality of aeration holes, so that ozone and exhaust gas can be mixed more easily.

[0006] Preferably, the filter module comprises a first support frame, wherein a filter is provided in the first support frame to filter out solid particles in the exhaust gas.

[0007] Preferably, the mixing module includes a second supporting frame, a fan is provided in the second supporting frame, and the filtered gas is mixed with ozone and enters the photocatalytic module and the ultraviolet lamp module through the mixing of the fan.

[0008] Preferably, the photocatalytic module includes a third support frame, in which a photocatalytic plate is provided. The photocatalytic plate is a honeycomb aluminum plate or a nickel plate loaded with titanium dioxide. Suitable photocatalysts and carriers can be selected according to different treatment conditions.

[0009] Preferably, the ultraviolet lamp module includes a fourth supporting frame, and a plurality of ultraviolet lamps are arranged in the fourth supporting frame.

[0010] The first supporting frame, the second supporting frame, the third supporting frame and the third supporting frame are all slidably connected to the inner side of the shell through a drawer-type structure, and the drawer-type structure can adopt existing technology.

[0011] Preferably, a plurality of spray heads are provided at the top of the shell near the air outlet, and a waste liquid tank is provided at the bottom of the shell. The upper side of the waste liquid tank is connected to the bottom of the shell. The treated gas is sprayed by the spray heads, and the soluble gas in the waste gas can be dissolved in water and collected in the waste liquid tank.

[0012] The beneficial effects of the present invention are:

[0013] The photocatalytic device for waste gas treatment provided by the present invention combines ozone oxidation with photocatalytic technology. Ozone is added to the photocatalytic reaction as an oxidant, which greatly improves the efficiency of separating photogenerated electrons and holes and enhances the catalytic performance. It can not only expand the range of target organic matter types for degradation, but also improve the ability to decompose pollutants. By providing a plurality of aeration holes and fans on the outlet pipe, the mixing of ozone and pollution is promoted, and by setting a spray head, soluble small molecule gases can be further removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a structural diagram of the filtering module;

[0017] Figure 3 Schematic diagram of the structure of the photocatalytic module;

[0018] Figure 4 It is a structural diagram of the UV lamp module.

[0019] Reference numerals:

[0020] 1-shell; 11-air inlet; 12-air outlet; 13-base; 2-filtration module; 21-first support frame; 22-filter; 3-mixing module; 31-second support frame; 32-fan; 4-photocatalytic module; 41-third support frame; 42-photocatalytic plate; 5-UV lamp module; 51-fourth support frame; 52-UV lamp; 6-ozone generator; 61-exhaust pipe; 62-aeration hole; 7-nozzle; 8-waste liquid tank. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0024] like Figure 1-4 As shown, a photocatalytic device for exhaust gas treatment includes a shell 1, a base 13 is provided at the bottom end of the shell, an air inlet 11 is provided at one end of the shell 1, and an air outlet 12 is provided at the other end of the shell 1. The shell 1 is provided with a filter module 2 and a mixing module 3 in sequence from the air inlet 11 to the air outlet 12, and a photocatalytic module 4 and an ultraviolet lamp module 5 are alternately provided in sequence from the mixing module 3 to the air outlet 12. An ozone generator 6 is provided on the side of the shell 1 close to the air inlet 11, and the ozone generator 6 is connected to an outlet pipe 61, which extends to the inside of the shell 1 between the filter module 2 and the photocatalytic module 4.

[0025] The filter module 2, mixing module 3, photocatalytic module 4 and UV lamp module 5 are all installed in the housing 1 in a drawer-type structure for easy installation. A sealing structure, which can be a sealing strip, is also provided between the drawer-type structure and the housing 1 to ensure the airtightness of the entire device.

[0026] The outlet pipe 61 is provided with a plurality of aeration holes 62 to facilitate mixing of ozone and exhaust gas.

[0027] The filter module 2 includes a first support frame 21 , in which a filter screen 22 is provided for filtering and removing solid particles in the exhaust gas.

[0028] The mixing module 3 includes a second support frame 31 , in which a fan 32 is provided. The filtered gas is mixed with ozone and then enters the photocatalytic module 4 and the ultraviolet lamp module 5 through the mixing of the fan 32 .

[0029] The photocatalytic module 4 includes a third support frame 41, in which a photocatalytic plate 42 is mounted. The photocatalytic plate 42 is a honeycomb aluminum plate or a nickel plate loaded with titanium dioxide. Suitable photocatalysts and carriers can be selected according to different treatment conditions.

[0030] The ultraviolet lamp 52 module 5 includes a fourth support frame 51 , and a plurality of ultraviolet lamps 52 are disposed in the fourth support frame 51 .

[0031] The first support frame 21 , the second support frame 31 , the third support frame 31 and the third support frame 41 are all slidably connected to the inner side of the housing 1 through a drawer-type structure, and the drawer-type structure can adopt existing technology.

[0032] Several spray heads are also provided at the top of the shell 1 near the air outlet 12, and a waste liquid tank 8 is provided at the bottom of the shell 1. The upper side of the waste liquid tank 8 is connected to the bottom of the shell 1. The treated gas is sprayed by the spray heads, and the soluble gas in the waste gas can be dissolved in water and collected in the waste liquid tank 8.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. In addition, the technical solutions of the various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually inconsistent or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A photocatalytic device for exhaust gas treatment, characterized in that: It includes a shell, a base is provided at the bottom end of the shell, an air inlet is provided at one end of the shell, and an air outlet is provided at the other end of the shell, the shell is provided with a filtering module and a mixing module in sequence from the air inlet to the air outlet, a photocatalytic module and an ultraviolet lamp module are alternately provided in sequence from the mixing module to the air outlet, an ozone generator is provided on the side of the shell close to the air inlet, the ozone generator is connected to an outlet pipe, and the outlet pipe extends to the inside of the shell between the filtering module and the photocatalytic module.

2. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The filtering module, mixing module, photocatalytic module and ultraviolet lamp module are all installed in the shell in a drawer-type structure.

3. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The air outlet pipe is provided with a plurality of aeration holes.

4. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The filter module includes a first support frame, and a filter screen is arranged in the first support frame.

5. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The mixing module includes a second supporting frame, and a fan is provided in the second supporting frame.

6. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The photocatalytic module includes a third supporting frame, in which a photocatalytic plate is arranged. The photocatalytic plate is a honeycomb aluminum plate or a nickel plate loaded with titanium dioxide.

7. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The ultraviolet lamp module comprises a fourth supporting frame, in which a plurality of ultraviolet lamps are arranged.

8. The photocatalytic device for exhaust gas treatment according to claim 1, wherein: The top of the shell body close to the air outlet is also provided with a plurality of spray heads, the bottom of the shell body is provided with a waste liquid tank, and the upper side of the waste liquid tank is communicated with the bottom of the shell body.

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