A C-band microwave ultraviolet light catalytic waste gas purification equipment without ozone
By combining C-band microwave ultraviolet photocatalysis equipment with pretreatment and a manganese oxide filter layer, the problems of ozone byproducts and catalyst activity decline were solved, achieving ozone-free emissions and efficient waste gas purification, while reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG RUIJING ENERGY ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-23
AI Technical Summary
Existing ultraviolet lamp catalytic waste gas treatment technologies suffer from ozone byproduct pollution and reduced catalyst activity, resulting in high maintenance costs and low purification efficiency.
The C-band microwave ultraviolet photocatalysis equipment, combined with a pretreatment unit, a manganese oxide filter layer and a specific wavelength ultraviolet lamp array, removes particulate matter through a primary filter and an electrostatic dust removal module, removes ozone using the manganese oxide filter layer to ensure zero or minimal ozone emissions, and uses a modified titanium dioxide catalyst to improve photocatalytic efficiency.
It achieves zero ozone emissions, extends catalyst life, improves purification efficiency, reduces maintenance costs, and enhances equipment operational stability.
Smart Images
Figure CN224388422U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air pollution control technology, and in particular to an ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device. Background Technology
[0002] In existing ultraviolet (UV) catalytic oxidation waste gas treatment technologies, traditional UV lamps using the 185nm wavelength generate ozone byproducts during photocatalyst excitation, causing secondary pollution. Furthermore, during long-term treatment of complex waste gases, the photocatalyst is easily covered by dust, oil mist, and other substances contained in the waste gas, leading to a significant decrease in catalyst activity and consequently affecting waste gas treatment efficiency. In addition, frequent cleaning of the catalyst layer is required, resulting in high maintenance costs.
[0003] Therefore, there is an urgent need for an ultraviolet photocatalytic purification device with zero or low ozone emissions and a long catalyst lifespan. Utility Model Content
[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide an ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device.
[0005] The technical solution adopted by this utility model to solve its technical problem is: an ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device, including a shell, a pretreatment unit, a photocatalytic reaction unit, and a manganese oxide filter layer. The shell is provided with an air inlet and an air outlet. The pretreatment unit includes a primary filter and an electrostatic dust removal module. The photocatalytic reaction unit includes an ultraviolet lamp array and a photocatalyst module. The primary filter, electrostatic dust removal module, ultraviolet lamp array, photocatalyst module, and manganese oxide filter layer are arranged sequentially from the air inlet to the air outlet inside the shell.
[0006] As a further improvement of this utility model: the air inlet and the air outlet are arranged opposite to each other, and the air inlet side of the housing is provided with a plurality of spaced-apart flow guide baffles, the flow guide baffles having an S-shaped structure.
[0007] As a further improvement of this utility model: the wavelength range of the ultraviolet lamp array is 254±5nm, and the power density is 80-120W / m². 3 .
[0008] As a further improvement of this utility model: the photocatalyst module is provided with a multilayer honeycomb ceramic carrier and titanium dioxide, and the surface of the honeycomb ceramic carrier is loaded with titanium dioxide.
[0009] As a further improvement of this utility model: the surface of the honeycomb ceramic carrier is loaded with Fe... 3+ / Graphene-modified titanium dioxide.
[0010] As a further improvement of this utility model: the housing is also provided with a first inspection door, which is located opposite to the electrostatic dust removal module.
[0011] As a further improvement of this utility model: the housing is also provided with a second inspection door, which is located opposite to the photocatalytic reaction unit and the manganese oxide filter layer.
[0012] As a further improvement of this utility model: the photocatalyst module and the ultraviolet lamp array are respectively installed in a sliding groove on the inner wall of the housing.
[0013] As a further improvement of this utility model: the air outlet is connected to the discharge pipe and the circulation pipe, an ozone sensor is provided at the air outlet, the outlet of the circulation pipe is connected to the processing port on the housing, and when the ozone detection value of the ozone sensor exceeds the set threshold, the valve of the discharge pipe is closed and the valve of the circulation pipe is opened.
[0014] As a further improvement of this utility model: the processing port is located between the housing and the photocatalyst module and the manganese oxide filter layer.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention achieves efficient degradation of waste gas through an ultraviolet lamp array and a photocatalyst module. It uses a manganese oxide filter layer to remove ozone generated by the photocatalyst excited by the ultraviolet lamp, preventing ozone emissions from exceeding the standard and achieving zero or minimal ozone generation. A pretreatment unit is also set up before the photocatalyst module, using a primary filter and an electrostatic dust removal module to remove particulate matter and oil mist, preventing dust and oil mist contained in the waste gas from covering the photocatalyst and reducing its activity. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model.
[0018] Figure label:
[0019] 1. Housing; 11. Air inlet; 12. Air outlet; 13. Inspection door; 14. Flow guide baffle; 2. Pretreatment unit; 21. Primary filter; 22. Electrostatic dust removal module; 3. Photocatalytic reaction unit; 31. Honeycomb ceramic carrier; 32. Ultraviolet lamp array; 4. Manganese oxide filter layer. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] In order to solve the technical problems in the prior art, the present invention will be further described in conjunction with the accompanying drawings and embodiments:
[0022] like Figure 1 As shown, this utility model discloses an ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device, including a shell 1, a pretreatment unit 2, a photocatalytic reaction unit 3, and a manganese oxide filter layer 4. The shell 1 is provided with an air inlet 11 and an air outlet 12. The pretreatment unit 2 includes a primary filter 21 and an electrostatic dust removal module 22. The photocatalytic reaction unit 3 includes an ultraviolet lamp array group 32 and a photocatalyst module. The primary filter 21, the electrostatic dust removal module 22, the ultraviolet lamp array group 32, the photocatalyst module, and the manganese oxide filter layer 4 are arranged sequentially from the air inlet 11 to the air outlet 12 inside the shell 1.
[0023] The ultraviolet lamp array 32 generates C-band microwave ultraviolet light. Through the synergistic effect of the ultraviolet lamp array 32 and the photocatalyst module, it can rapidly and efficiently degrade various pollutants in the exhaust gas. At the same time, with the help of the manganese oxide filter layer 4, the ozone generated during the ultraviolet lamp excitation of the photocatalyst can be effectively removed, ensuring that the final exhaust gas of the equipment is free of ozone pollution, avoiding the risk of secondary pollution, and achieving the dual goals of efficient degradation of exhaust gas and ozone-free emission.
[0024] A pretreatment unit 2 is installed at the front end of the photocatalyst module. A primary filter 21 initially intercepts larger particles in the exhaust gas, while an electrostatic precipitator 22 further removes fine dust and oil mist. These two stages of pretreatment effectively prevent pollutants in the exhaust gas from covering the active sites on the photocatalyst surface, thereby reducing the reduction in photocatalyst activity caused by contamination, significantly extending the photocatalyst's lifespan, and ensuring long-term stable purification efficiency of the equipment.
[0025] In some embodiments, the wavelength range of the ultraviolet lamp array 32 is 254±5nm, and the power density is 80-120W / m². 3 .
[0026] A C-band ultraviolet lamp array 32 with a wavelength range of 254±5nm is employed. This wavelength of ultraviolet light significantly reduces ozone generation during photocatalyst excitation compared to the traditional 185nm band, minimizing the risk of ozone formation at the source. Simultaneously, the synergistic effect of the ultraviolet lamp array 32 and the photocatalyst module enables rapid and efficient degradation of various pollutants in the exhaust gas. Combined with the manganese oxide filter layer 4, trace amounts of ozone that may be generated during ultraviolet lamp excitation are effectively removed, ensuring that the final exhaust gas from the equipment is free of ozone pollution and avoiding the risk of secondary pollution.
[0027] In some embodiments, the photocatalyst module is provided with a multilayer honeycomb ceramic carrier 31 and titanium dioxide, with titanium dioxide loaded on the surface of the honeycomb ceramic carrier 31.
[0028] The C-band ultraviolet lamp array 32 has ultraviolet light wavelengths arranged in an alternating pattern within the carrier gaps, combined with 80-120W / m 3 The power density design enables ultraviolet light to form a uniform and efficient radiation field in the reaction space, significantly increasing the contact area between the photocatalyst and ultraviolet light.
[0029] Furthermore, the surface of the honeycomb ceramic carrier 31 is loaded with Fe-containing materials. 3+ Graphene-modified titanium dioxide. The modified TiO2 catalyst exhibits a quantum efficiency improvement of over 40% under C-band UV light.
[0030] In some embodiments, the air inlet 11 and the air outlet 12 are arranged opposite to each other, and the air inlet side of the housing 1 is provided with a plurality of spaced-apart baffles 14, which are S-shaped.
[0031] Multiple S-shaped baffles 14 arranged at intervals on the air inlet side of the housing 1 can guide the exhaust gas entering the housing 1 in an orderly manner, forcing the gas to flow in an "S" shaped path inside the equipment. This "S" shaped gas flow improves the utilization efficiency of ultraviolet light. The S-shaped baffles 14 make the distribution of exhaust gas inside the housing 1 more uniform, and allow pollutants in the exhaust gas to have more opportunities for contact and reaction with the photocatalyst.
[0032] The air inlet 11 is located on the left or right side, and the air outlet 12 is located on the left or right side. The air outlet 12 and the air inlet 11 are opposite to each other to form an airflow channel.
[0033] In some embodiments, the housing 1 is further provided with a first inspection door 13, which is located opposite to the electrostatic dust removal module 22.
[0034] When the electrostatic dust removal module 22 accumulates a lot of dust due to long-term use and needs cleaning or maintenance due to malfunction, the staff can directly open the first maintenance door 13 to quickly operate the electrostatic dust removal module 22 without disassembling the entire equipment, which greatly shortens the maintenance time and improves the maintenance efficiency.
[0035] The housing 1 is also provided with a second inspection door 13, which is located opposite to the photocatalytic reaction unit 3 and the manganese oxide filter layer 4.
[0036] Furthermore, when it is necessary to replace the ultraviolet lamp, clean or replace the photocatalyst module, and replace the manganese oxide filter layer 4, these components can be directly accessed through the second inspection door 13, simplifying the maintenance process, reducing equipment downtime for maintenance, ensuring the continuous and stable operation of the equipment, and further reducing the maintenance cost and workload of the equipment.
[0037] In some embodiments, the photocatalyst module and the ultraviolet lamp array 32 are respectively mounted in a sliding groove on the inner wall of the housing 1. The honeycomb ceramic carrier 31 and the ultraviolet lamp array can be quickly disassembled and replaced, reducing maintenance costs.
[0038] The inner wall of the housing 1 is provided with a horizontally extending groove at the corresponding position. The edge of the photocatalyst module and the edge of the mounting bracket of the ultraviolet lamp array 32 are provided with slide rails that are adapted to the groove. The slide rails can slide smoothly along the groove to realize the quick assembly and disassembly of the photocatalyst module, the ultraviolet lamp array 32 and the housing 1.
[0039] When it is necessary to clean or replace the photocatalyst module, or to replace or repair the lamps of the UV lamp array 32, no complicated tools are needed. The photocatalyst module or UV lamp array 32 can be easily removed from the housing 1 by simply pulling it out. The operation is simple and efficient, and the overall maintenance cost of the equipment is greatly reduced.
[0040] In some embodiments, the outlet 12 is connected to an exhaust pipe and a recirculation pipe. An ozone sensor is installed at the outlet 12. The outlet of the recirculation pipe is connected to a processing port on the housing 1. When the ozone detection value of the ozone sensor exceeds a set threshold, the valve of the exhaust pipe is closed and the valve of the recirculation pipe is opened. Conversely, when the ozone sensor detects that the ozone concentration at the outlet 12 does not exceed the set threshold, the valve of the exhaust pipe is opened and the valve of the recirculation pipe is closed.
[0041] The exhaust pipe and recirculation pipe connected to the outlet 12, together with the ozone sensor and corresponding valve control mechanism, form a reliable exhaust gas emission protection system. When the ozone sensor detects that the ozone concentration at the outlet 12 exceeds the set threshold, the system automatically closes the valve of the exhaust pipe and opens the valve of the recirculation pipe, allowing the substandard gas to be re-transported to the treatment port on the housing 1 through the recirculation pipe. In some embodiments, the treatment port is located on the housing 1 between the photocatalyst module and the manganese oxide filter layer 4.
[0042] The treatment port is located in the housing 1 between the photocatalyst module and the manganese oxide filter layer 4. Gas containing trace amounts of ozone can re-enter the area between the photocatalytic reaction unit 3 and the manganese oxide filter layer 4. The ozone is completely removed through the deep adsorption and decomposition of the manganese oxide filter layer 4, ensuring that the gas recirculated to the outlet 12 fully meets the emission standards and achieves zero ozone emissions.
[0043] The waste gas treatment process is as follows:
[0044] (1) The waste gas to be treated enters the pretreatment unit through the air inlet on the shell. In the pretreatment unit, the waste gas first passes through the primary filter, where larger dust particles are initially intercepted; then it enters the electrostatic dust removal module, where fine dust, oil mist and other impurities contained in the waste gas are further removed, and the clean gas after pretreatment enters the next treatment stage.
[0045] (2) Clean gas enters the photocatalytic reaction unit. The C-band ultraviolet lamp array in the unit emits ultraviolet light, which excites the photocatalyst module to generate hydroxyl radicals. Hydroxyl radicals have extremely strong oxidizing ability and can efficiently decompose pollutants such as VOCs in the exhaust gas into harmless CO2 and H2O.
[0046] (3) During the process of gas flowing through the photocatalytic reaction unit, multiple S-shaped baffles arranged at intervals on the air inlet side of the shell guide the gas to flow in an “S” shape, so that ultraviolet light can be utilized more fully and the gas can be in contact with the photocatalyst more fully.
[0047] (4) The gas processed by the photocatalytic reaction unit continues to flow to the manganese oxide filter layer, which will efficiently filter out the trace amount of ozone that may be generated during the excitation of the photocatalyst by the C-band ultraviolet lamp, ensuring that the ozone content in the gas meets the emission requirements.
[0048] (5) When the purified gas reaches the outlet, the ozone sensor at the outlet detects the ozone concentration in the gas in real time. If the detected value does not exceed the set threshold, the valve of the discharge pipe opens and the gas is discharged through the discharge pipe in compliance with the standard; if the detected value exceeds the set threshold, the valve of the discharge pipe closes and the valve of the circulation pipe opens, and the gas is transported through the circulation pipe to the treatment port located in the shell between the photocatalyst module and the manganese oxide filter layer, and re-enters the treatment process, passing through the photocatalytic reaction unit and the manganese oxide filter layer again until the ozone concentration reaches the standard and is discharged through the discharge pipe.
[0049] The main functions of this utility model are:
[0050] Using a 254nm C-band ultraviolet light source, ozone generation is avoided by traditional 185nm light sources. The modified TiO2 catalyst has a quantum efficiency of more than 40% under C-band ultraviolet light. An integrated manganese oxide filter layer filters out ozone and prevents ozone emissions from exceeding the standard.
[0051] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.
Claims
1. An ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device, characterized in that, The device includes a housing, a pretreatment unit, a photocatalytic reaction unit, and a manganese oxide filter layer. The housing has an air inlet and an air outlet. The pretreatment unit includes a primary filter and an electrostatic dust removal module. The photocatalytic reaction unit includes an ultraviolet lamp array and a photocatalyst module. Inside the housing, from the air inlet to the air outlet, the primary filter, the electrostatic dust removal module, the ultraviolet lamp array, the photocatalyst module, and the manganese oxide filter layer are arranged in sequence.
2. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The air inlet and air outlet are arranged opposite to each other, and the air inlet side of the housing is provided with a plurality of spaced-apart baffles, which are S-shaped.
3. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The wavelength range of the array of UV lamps is 254 ± 5 nm, with a power density of 80-120 W / m 3 .
4. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The photocatalyst module is provided with a multilayer honeycomb ceramic carrier and titanium dioxide, and the surface of the honeycomb ceramic carrier is loaded with titanium dioxide.
5. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 4, characterized in that, The honeycomb ceramic carrier surface is loaded with Fe 3+ Titanium dioxide modified with graphene.
6. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The housing is also provided with a first inspection door, which is located opposite to the electrostatic dust removal module.
7. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device according to claim 6, characterized in that, The housing is also provided with a second inspection door, which is located opposite the photocatalytic reaction unit and the manganese oxide filter layer.
8. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The photocatalyst module and the ultraviolet lamp array are respectively installed in a sliding groove on the inner wall of the housing.
9. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification equipment according to claim 1, characterized in that, The outlet is connected to the discharge pipe and the circulation pipe. An ozone sensor is installed at the outlet. The outlet of the circulation pipe is connected to the processing port on the housing. When the ozone detection value of the ozone sensor exceeds a set threshold, the valve of the discharge pipe is closed and the valve of the circulation pipe is opened.
10. The ozone-free C-band microwave ultraviolet photocatalytic waste gas purification device according to claim 9, characterized in that, The processing port is located between the housing and the photocatalyst module and the manganese oxide filter layer.