Oxy hóa nhiệt Kiểm soát VOC Các hợp chất hữu cơ dễ bay hơi (VOC) nói chung là nhiên liệu được dễ dàng gây cháy. Thông qua quá trình đốt cháy, đó là synomonous với quá trình oxy hóa nhiệt và incinceration, các hợp chất hữu cơ bị oxy hóa thành CO2 và nước, trong khi các nguyên tố vi lượng như lưu huỳnh và clo được oxy hóa thành các loài như SO2 và HCl. Ba quá trình đốt có kiểm soát khí thải hơi bằng cách tiêu diệt hơi thu thập để ngăn chặn thải ra môi trường là. | Thermal Oxidation for VOC Control Volatile organic compounds VOCs generally are fuels that are easily combustible. Through combustion which is synomonous with thermal oxidation and incincera-tion the organic compounds are oxidized to CO2 and water while trace elements such as sulfur and chlorine are oxidized to species such as SO2 and HCl. Three combustion processes that control vapor emissions by destroying collected vapors to prevent release to the environment are a thermal oxidation flares b thermal oxidation and incineration and c catalytic oxidation. Each of these processes has unique advantages and disadvantages that require consideration for proper application. For example flares are designed for infrequent large volumes of concentrated hydrocarbon emissions while thermal oxidizers are designed for high-efficiency treatment of continuous mixed-hydrocarbon gas streams and catalytic oxidizers are designed to minimize fuel costs for continuous low-concentration emissions of known composition. The design of the basic processes can be modified for specific applications resulting in the overlap of the distinctions between processes. For example ground flares are basically thermal oxidizers without heat recovery that frequently are used for intermittent flow of relatively low volumes of concentrated VOC streams. COMBUSTION BASICS As every Boy Scout Girl Scout and firefighter knows combustion requires the three legs of the fire triangle illustrated in Figure . The oxidizer and fuel composition . air-to-fuel ratio is critical to combustion. If the fuel concentration in air is below the Lower Flammability Limit LFL also known as the Lower Explosive Limit LEL the mixture will be too lean to burn. If it is above the Upper Flammability Limit UFL it will be too rich to burn. Fuels with a wide range of flammability limits burn more easily than those with a narrow range. With a narrow range the flame is more unstable since the interior of the flame can easily be
