Relying on its advantages of efficiently degrading organic pollutants, removing odors, and adapting to complex working conditions, UV photo-oxidation catalysis technology is widely applied in three core scenarios: industrial waste gas treatment, odor control in the environmental protection field, and civil & commercial air purification.
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Core Working Principle: Two-Step Synergy of "Photolysis + Catalysis"
The essence of UV photo-oxidation catalysis is to use ultraviolet rays to provide energy and catalysts to activate active substances, ultimately achieving the complete degradation of pollutants. It is specifically divided into two key stages:
UV Photolysis: Breaking Down the Molecular Structure of Pollutants
The equipment emits dual-wavelength ultraviolet rays of 185nm (high-energy short-wave) and 254nm (medium-wave):
- UV light at 185nm has extremely high energy (approximately 647kJ/mol), which can directly "cleave" the chemical bonds of organic pollutants (such as C-C and C-H bonds in VOCs). It breaks down macromolecules like benzene, toluene, and formaldehyde into small molecular fragments (e.g., hydrocarbon free radicals). At the same time, it damages the DNA of microorganisms (bacteria, molds) to eliminate biological odors.
- UV light at 254nm assists in enhancing sterilization and provides part of the energy for the subsequent catalytic reaction.
Catalytic Oxidation: Generating Active Substances to Degrade Pollutants
The system is equipped with semiconductor catalysts such as nano-sized titanium dioxide , which undergoes a "photocatalytic reaction" under UV irradiation:
- After being excited by UV light, the catalyst generates positively charged "holes " and negatively charged "electrons ".
- The holes react with water molecules in the air to produce hydroxyl radicals (with an oxidation potential of 2.8V, stronger than ozone and chlorine, and capable of oxidizing almost all organic compounds).
- The electrons react with oxygen molecules to generate superoxide anions and ozone .
- These strong oxidizing substances react with the small molecular fragments produced in the first step, and finally oxidize them completely into carbon dioxide , water , and harmless inorganic salts (for example, sulfur-containing pollutants are converted into sulfates).
1. Core Components (Taking UV Photo-Oxidation Catalytic Purifier as an Example)
The realization of the equipment's functions depends on the collaboration of the following core components:
- High-Energy UV Lamps: Provide dual-wavelength ultraviolet light of 185nm/254nm, serving as the "energy source" for the reaction, with a service life usually ranging from 8,000 to 12,000 hours.
- Catalyst Carrier: Mostly honeycomb ceramic/metal mesh (with large specific surface area and good air permeability), used to load the TiO2 catalyst to ensure full contact with waste gas.
- Flow Guiding Device: Guides the waste gas to flow evenly through the reaction zone to avoid "short-circuiting" (direct discharge without reaction).
- Protective Enclosure: Made of stainless steel (corrosion-resistant) to prevent UV leakage (short-wave UV is harmful to the human body).
2. Core Technical Advantages
Compared with traditional technologies such as activated carbon adsorption and plasma purification, UV photo-oxidation catalysis has significant advantages:
- High Purification Efficiency: The removal rate of VOCs (formaldehyde, benzene series) and odorous gases (hydrogen sulfide, ammonia) reaches over 90%, and it achieves simultaneous sterilization.
- Low Operating Cost: No mechanical components (no noise), no need for chemical agents, only consumes electricity. Daily maintenance only requires regular lamp replacement and catalyst cleaning.
- Strong Adaptability: Capable of treating high-concentration (≤2000mg/m³) and large-air-volume (1000-100000m³/h) waste gas, and can withstand temperatures from -30ºC to 95ºC and humidity from 40% to 98% without pre-treatment.
- No Secondary Pollution: The final products are CO2 and water, without generating "spent activated carbon hazardous waste" or nitrogen oxides (NOx)
Supplementary Notes on Key Expressions:
- "Catalyst Carrier": The term accurately conveys the function of "bearing and fixing the catalyst". "Honeycomb ceramic" (honeycomb ceramic) and "metal mesh" (metal mesh) are direct translations of common carrier materials, which are in line with international industrial terminology.
- Unit and Symbol Standardization: Symbols such as "≤2000mg/m³" (concentration), "1000-100000m³/h" (air volume), and "CO2" (carbon dioxide) retain the original technical notation to ensure the accuracy of parameter transmission, which is consistent with the expression habits of global environmental protection equipment documents.
- "Short-Circuiting": This is a professional term in waste gas treatment, referring to the phenomenon that waste gas is discharged without sufficient reaction. The quotation marks in the original text are retained in the translation to emphasize the special meaning of the term in this technical scenario.
- Industrial Field: Spray-painting workshops (furniture/automotive painting), printing factories (ink waste gas), chemical plants (organic solvents), rubber factories (vulcanization odor), pharmaceutical factories (pharmaceutical intermediates).
- Environmental Protection Field: Sewage treatment plants (aeration tank odor), garbage transfer stations (leachate odor), kitchen waste treatment plants (decay odor).
- Civil/Commercial Field: Large-scale kitchens (auxiliary treatment of oil fume odor), laboratories (organic reagent waste gas), breeding farms (livestock manure odor).
Address: Huji Industrial Park, Deshang Expressway, Mudan District, Heze City, Shandong Province, China
Business type: Manufacturer/factory, trading company
Business scope: manufacturing and processing machinery
Management system certification: ISO9001:2015 ISO45001:2018 ISO14001:2015
Main products: Ground flare, Biogas flares, flare stack,
Thermal Oxidation Furnace, Flue gas purification equipment
Heze Zexuan Equipment Manufacturing Co., Ltd. is an enterprise engaged in the manufacture of special equipment for environmental protection; sales of special equipment for environmental protection; application of industrial automation technology; sales of power electronic components; research and development of mechanical equipment; sales of intelligent instruments and meters; manufacturing of intelligent instruments and meters; research and development and promotion of comprehensive utilization of waste gas and VOCs treatment technology.
The company's main products and service directions: manufacturing of ground torches, elevated torches, waste gas venting torches, biogas torches, three waste incinerators, and wastewater treatment equipment, industrial automation and DCS system applications, wastewater treatment projects, VOCs treatment equipment and engineering construction, petrochemical accessories and instrument sales, petrochemical equipment installation, maintenance and repair, etc.; support product customization services and OEM services in the same industry, from design to manufacturing, installation, commissioning, and after-sales one-stop service.
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