Photocatalytic waste gas treatment system

Abstract

The utility model relates to the technical field of photocatalysis, and discloses a photocatalytic waste gas treatment system which comprises a conveying pipe, a plurality of photocatalytic modules and a communicating pipe, one end of the conveying pipe is provided with a gas inlet, the other end of the conveying pipe is provided with a gas outlet, and the photocatalytic modules are sequentially installed in the conveying pipe in the conveying direction of the conveying pipe. A gap exists between every two adjacent photocatalytic modules to form a communicating area, each photocatalytic module comprises a photocatalytic assembly and a fan, the communicating pipe is communicated with the communicating area through a connecting pipe, the communicating pipe is provided with a first air vent and a second air vent, the first air vent is communicated with the outside, a first pressure valve is arranged at the first air vent, and a second pressure valve is arranged at the second air vent. The circulation direction of the first pressure valve is from the outside to the inside of the conveying pipe, the second ventilation opening is communicated with the air inlet, a second pressure valve is arranged at the second ventilation opening, and the circulation direction of the second pressure valve is from the communicating pipe to the air inlet. The air volume of each fan can be basically kept consistent, and the working efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of photocatalysis, in particular to a photocatalytic waste gas treatment system. Background Art

[0002] Photocatalytic technology is an advanced waste gas treatment technology. It mainly uses photocatalysts to produce catalytic oxidation under the action of light (especially ultraviolet light) to decompose harmful substances in waste gas into harmless substances, such as water and carbon dioxide. It has the advantages of low energy consumption, high efficiency, wide application range, no secondary pollution, no ozone release, etc., and is increasingly attracting attention. The existing photocatalytic module includes a fan and a photocatalytic component. The photocatalytic component includes a photocatalytic plate provided with a photocatalyst and a light source for irradiating the catalytic plate. Driven by the fan, the waste gas passes through the photocatalytic plate of the photocatalytic component, thereby being decomposed and treated. When the concentration of VOCs is high, multiple photocatalytic modules are usually used in series. In order to ensure the efficiency of the work, the air volume of each fan should be as similar as possible. However, when the organic gas is decomposed, its total molar number will basically change, so its volume and air pressure will also change accordingly. It is impossible to achieve the same air volume of each fan, which affects the efficiency of the work, and will cause the local fan to be overloaded and leak, etc., which poses a safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a photocatalytic waste gas treatment system which can keep the air pressure in the conveying pipe consistent, thereby helping to keep the air volume of each fan consistent and having high working efficiency.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a photocatalytic waste gas treatment system, including a delivery pipe, a photocatalytic module and a connecting pipe, one end of the delivery pipe is provided with an air inlet, the other end of the delivery pipe is provided with an air outlet, a plurality of the photocatalytic modules are arranged and are installed in the delivery pipe in sequence along the delivery direction of the delivery pipe, and a spacing exists between two adjacent photocatalytic modules to form a connecting area, the photocatalytic module includes a photocatalytic component and a fan, the fan is located on the side of the photocatalytic module away from the air inlet, the connecting pipe is connected to the connecting area through a connecting pipe, the connecting pipe is provided with a first air vent and a second air vent, the first air vent is connected to the outside world, a first pressure valve is provided at the first air vent, and the flow direction of the first pressure valve is from the outside world to the delivery pipe, the second air vent is connected to the air inlet, a second pressure valve is provided at the second air vent, and the flow direction of the second pressure valve is from the connecting pipe to the air inlet.

[0005] As a preferred embodiment of the present invention, the photocatalytic component includes a frame, a photocatalytic plate and a lamp board. The photocatalytic plate is covered on one lateral side of the frame close to the air outlet. The lamp board is fixed on one lateral side of the frame close to the air inlet. The lamp board is provided with a light source capable of irradiating the photocatalytic plate.

[0006] As a preferred solution of the utility model, the top cover of the frame is provided with a detachable cover plate, the longitudinal sides of the frame are respectively provided with mounting grooves, the top of the mounting grooves are open, and the two sides of the photocatalytic plate are respectively inserted into the mounting grooves.

[0007] As a preferred solution of the utility model, the light board is arranged in the longitudinal direction, both ends of the light board are respectively fixedly connected to the frame, and a plurality of light boards are provided and are arranged at intervals in the vertical direction.

[0008] As a preferred solution of the present utility model, the photocatalytic module includes a plurality of the photocatalytic components, and the photocatalytic components are arranged in sequence along the conveying direction of the conveying pipe.

[0009] The utility model embodiment of a photocatalytic waste gas treatment system has the following beneficial effects compared with the prior art: when working, the waste gas is transported into the delivery pipe through the air inlet, and under the action of the fan, the waste gas is transported in the direction of the air outlet. During the transportation process, the waste gas passes through a plurality of photocatalytic components in sequence, thereby achieving decomposition and treatment of harmful substances in the waste gas; during the transportation of the waste gas, when the waste gas is transported to the connecting area through the photocatalytic module, if the organic gas in the waste gas is decomposed and the pressure of the waste gas is reduced, the air pressure in the connecting area is adjusted by the first pressure valve and the second pressure valve at this time, so that the air pressure in each connecting area in the delivery pipe is basically consistent, so that the air volume of each fan is basically consistent, thereby ensuring the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a structural diagram of the photocatalytic component of the utility model;

[0012] Figure 3 This is a structural diagram of the photocatalytic component of the utility model without the cover plate;

[0013] In the figure, 1. delivery pipe; 11. air inlet; 12. air outlet; 13. connecting area; 2. photocatalytic module; 21. photocatalytic component; 211. frame; 212. photocatalytic plate; 213. lamp board; 214. light source; 215. cover plate; 216. mounting groove; 22. fan; 3. connecting pipe; 31. first air vent; 311. first pressure valve; 32. second air vent; 321. second pressure valve; 4. connecting pipe. DETAILED DESCRIPTION

[0014] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0016] like Figure 1-3As shown, a photocatalytic waste gas treatment system of a preferred embodiment of the utility model includes a delivery pipe 1, a photocatalytic module 2 and a connecting pipe 3, one end of the delivery pipe 1 is provided with an air inlet 11, the other end of the delivery pipe 1 is provided with an air outlet 12, a plurality of photocatalytic modules 2 are provided and are sequentially installed in the delivery pipe 1 along the delivery direction of the delivery pipe 1, and a spacing is provided between two adjacent photocatalytic modules 2 to form a connecting area 13, specifically, a photocatalytic component 21 of the previous photocatalytic module 2 and a fan 22 of the next photocatalytic module 2 A connecting area 13 is formed between the photocatalytic module 2, the photocatalytic module 2 includes a photocatalytic component 21 and a fan 22, the fan 22 is located on the side of the photocatalytic module 2 away from the air inlet 11, it can be understood that the end of the fan 22 close to the air inlet 11 is the exhaust end, and the end of the fan 22 close to the air outlet 12 is the blowing end, the connecting pipe 3 is connected to the connecting area 13 through the connecting pipe 4, the number of the connecting pipes 4 is consistent with the number of the connecting areas 13, the connecting pipes 4 are connected to the connecting areas 13 one by one, and the connecting pipe 3 is provided with a first vent 31 and a second vent The vent 32, the first vent 31 is connected to the outside, and a first pressure valve 311 is provided at the first vent 31. The flow direction of the first pressure valve 311 is from the outside to the inside of the delivery pipe 1. The second vent 32 is connected to the air inlet 11. Under normal circumstances, the first pressure valve 311 is in a closed state. When the difference between the air pressure in the connecting pipe 3 and the air pressure in the outside is less than the set value of the first pressure valve 311, the first pressure valve 311 is opened, and the outside air can enter the connecting pipe 3 through the first pressure valve 311. For example, the second vent 32 is connected to the air inlet 11. A pressure valve 311 is a negative pressure prevention valve, and a second pressure valve 321 is provided at the second air vent 32. The flow direction of the second pressure valve 321 is from the connecting pipe 3 to the air inlet 11. Similarly, under normal circumstances, the second pressure valve 321 is in a closed state. When the difference between the air pressure in the connecting pipe 3 and the air pressure at the air inlet 11 is greater than the set value of the second pressure valve 321, the second pressure valve 321 opens, and the connecting pipe 3 can enter the delivery pipe 1 through the first pressure valve 311. For example, the second pressure valve 321 is a pressure release valve.

[0017] The working principle of this embodiment is as follows: when working, the exhaust gas is transported to the delivery pipe 1 through the air inlet 11, and under the action of the fan 22, the exhaust gas is transported in the direction of the exhaust port 12. During the transportation process, the exhaust gas passes through multiple photocatalytic components 21 in sequence, thereby achieving the decomposition and treatment of harmful substances in the exhaust gas; during the transportation process of the exhaust gas, when the exhaust gas is transported to the connecting area 13 through the photocatalytic module 2, if the organic gas in the exhaust gas is decomposed and the pressure of the exhaust gas is reduced, the air pressure in the connecting area 13 and the connecting pipe 3 is reduced. When the air pressure in the connecting pipe 3 is less than the set value, the first pressure valve 311 opens , the outside air enters the connecting area 13 through the first pressure valve 311 and the connecting pipe 3; if the organic gas in the exhaust gas is decomposed and the pressure of the exhaust gas increases, the air pressure in the connecting area 13 and the connecting pipe 3 increases. When the air pressure in the connecting pipe 3 is greater than the set value, the second pressure valve 321 opens, and the gas in the connecting pipe 3 is transported to the air inlet 11; the air pressure in the connecting area 13 is adjusted by the first pressure valve 311 and the second pressure valve 321, so that the air pressure in each connecting area 13 in the delivery pipe 1 is basically consistent, so that the air volume of each fan 22 is basically consistent, ensuring work efficiency.

[0018] Exemplarily, the photocatalytic component 21 includes a frame 211, a photocatalytic plate 212 and a lamp board 213. The photocatalytic plate 212 is covered on one lateral side of the frame 211 close to the air outlet 12. Generally, the photocatalytic plate 212 is a mesh plate, which helps the exhaust gas to pass through the photocatalytic plate 212. The mesh plate is coated with a photocatalyst (such as titanium dioxide). The lamp board 213 is fixed on one lateral side of the frame 211 close to the air inlet 11. The lamp board 213 is provided with a light source 214 capable of irradiating the photocatalytic plate 212.

[0019] Exemplarily, the top cover of the frame 211 is provided with a removable cover plate 215, and mounting grooves 216 are respectively provided on both longitudinal sides of the frame 211. The top of the mounting groove 216 is open, and both sides of the photocatalytic plate 212 are respectively inserted into the mounting groove 216. After removing the cover plate 215, the photocatalytic plate 212 can be pulled out, which facilitates the disassembly and assembly of the photocatalytic plate 212.

[0020] Exemplarily, the lamp board 213 is arranged longitudinally, and both ends of the lamp board 213 are respectively fixedly connected to the frame 211. A plurality of lamp boards 213 are arranged vertically at intervals, so that the photocatalytic plate 212 can be fully illuminated, and the exhaust gas can be transported from between two adjacent lamp boards 213 to the photocatalytic plate 212.

[0021] Exemplarily, the photocatalytic module 2 includes a plurality of photocatalytic components 21, and the photocatalytic components 21 are arranged in sequence along the conveying direction of the conveying pipe 1, that is, a plurality of photocatalytic components 21 used in series are arranged in one photocatalytic module 2, which helps to improve the treatment efficiency of the exhaust gas.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A photocatalytic exhaust gas treatment system, characterized in that: It includes a delivery pipe, a photocatalytic module and a connecting pipe, one end of the delivery pipe is provided with an air inlet, the other end of the delivery pipe is provided with an air outlet, a plurality of the photocatalytic modules are provided and are installed in the delivery pipe in sequence along the delivery direction of the delivery pipe, and a distance exists between two adjacent photocatalytic modules to form a connecting area, the photocatalytic module includes a photocatalytic component and a fan, the fan is located on the side of the photocatalytic module away from the air inlet, the connecting pipe is connected with the connecting area through a connecting pipe, the connecting pipe is provided with a first air vent and a second air vent, the first air vent is connected with the outside, a first pressure valve is provided at the first air vent, the flow direction of the first pressure valve is from the outside to the delivery pipe, the second air vent is connected with the air inlet, a second pressure valve is provided at the second vent, and the flow direction of the second pressure valve is from the connecting pipe to the air inlet.

2. The photocatalytic exhaust gas treatment system according to claim 1, characterized in that: The photocatalytic component includes a frame, a photocatalytic plate and a lamp board. The photocatalytic plate is covered on one lateral side of the frame close to the air outlet. The lamp board is fixed on one lateral side of the frame close to the air inlet. The lamp board is provided with a light source capable of irradiating the photocatalytic plate.

3. The photocatalytic exhaust gas treatment system according to claim 2, characterized in that: The top cover of the frame is provided with a detachable cover plate, and the longitudinal sides of the frame are respectively provided with mounting grooves, the tops of the mounting grooves are open, and the two sides of the photocatalytic plate are respectively inserted into the mounting grooves.

4. The photocatalytic exhaust gas treatment system according to claim 2, characterized in that: The light board is arranged in the longitudinal direction, and both ends of the light board are respectively fixedly connected to the frame. A plurality of light boards are provided and are arranged at intervals in the vertical direction.

5. The photocatalytic exhaust gas treatment system according to claim 2, characterized in that: The photocatalytic module includes a plurality of the photocatalytic components, and the photocatalytic components are arranged in sequence along the conveying direction of the conveying pipe.

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