Views: 101
During the chemical production process, a large amount of volatile organic compounds (VOCs) are emitted into the atmosphere as exhaust gases. These VOCs are complex in composition and contain various harmful substances such as benzene, toluene, xylene, formaldehyde, etc. They not only have irritating odors, but also cause direct damage to human health. VOCs are key precursors for the formation of ozone (O3) and fine particulate matter (PM2.5). Under sunlight, VOCs undergo photochemical reactions with nitrogen oxides to generate ozone, leading to a decrease in air quality and triggering photochemical smog events. Meanwhile, VOCs also participate in the formation of PM2.5 through a series of complex atmospheric reactions, further exacerbating the frequency and severity of haze weather.
Adsorption method is currently one of the widely used VOCs treatment technologies. The principle is to use the porous structure of adsorbents (such as activated carbon, molecular sieves, etc.) to adsorb VOCs molecules on their surfaces, thereby achieving the separation and enrichment of VOCs in exhaust gas. Activated carbon has a large specific surface area and rich microporous structure, and has good adsorption performance for most VOCs, especially suitable for the treatment of low concentration and high air volume chemical tail gas. After the adsorbent is saturated with adsorption, desorption regeneration can be carried out through heating, pressure reduction, and other methods to restore the adsorption capacity of the adsorbent and recover high concentrations of VOCs, achieving resource recycling.
Catalytic combustion technology involves the oxidation and decomposition of VOCs into carbon dioxide and water at lower temperatures under the action of a catalyst. Compared with traditional thermal combustion, catalytic combustion has the advantages of low ignition temperature, low energy
consumption, high treatment efficiency, and no secondary pollution. The commonly used catalysts mainly include precious metal catalysts (such as platinum, palladium, etc.) and non precious metal catalysts (such as transition metal oxides, etc.). Precious metal catalysts have high activity and good selectivity, but their cost is relatively high; Non precious metal catalysts have lower costs, but their activity and stability are relatively poor. In recent years, the continuous improvement of the performance of non precious metal catalysts through modification and optimization of catalysts has become one of the research hotspots.
Thermal storage incinerator (RTO) is also an important technical means for the treatment of VOCs in chemical tail gas. As a one-stop supplier for VOCs industrial waste gas treatment, San Ti Environment has rich experience and professional technology in the application of thermal storage incinerators. The working principle of RTO is to heat organic waste gas to above 760 ℃, so that VOCs in the waste gas are oxidized and decomposed into carbon dioxide and water. At the same time, ceramic thermal storage bodies are used to store the heat generated during the oxidation and decomposition of exhaust gas, which is used to preheat newly introduced organic exhaust gas, thereby achieving the goal of energy conservation and emission reduction. This technology has high purification efficiency, generally reaching over 99%, and can treat high concentration, high-volume organic waste gases. And due to its high heat recovery efficiency, it can effectively reduce operating costs.
With the increasingly strict environmental requirements and people's increasing attention to air quality, the VOCs treatment technology for chemical exhaust will develop towards a more efficient, energy-saving, and environmentally friendly direction. Developing new, efficient, and low-cost catalysts and adsorbents to improve the adaptability and stability of treatment technologies is an important research direction for the future. At the same time, suppliers like Santi Environment will continue to optimize existing technologies such as thermal storage incinerators, strengthen technological innovation, and provide better solutions for the treatment of VOCs in chemical tail gas. In addition, real-time monitoring and intelligent control of chemical exhaust emissions to achieve precise governance, improve governance efficiency and management level are also future development trends
