Emissions from liquefied gas refining and gasoline refining

The exhaust gases generated from liquefied gas refining and gasoline refining in refineries are usually treated through several steps to reduce their impact on the environment and human health. The general process for exhaust gas treatment is as follows: 1. **Pre-treatment**: The exhaust gases generated from the refining of liquefied gas and gasoline are first subjected to pre-treatment to remove large particles and oil vapors from them. 2. **Primary treatment**: The pretreated exhaust gas then enters a primary treatment unit, which is usually a catalytic combustion device or a desulfurization device. This step is primarily aimed at removing harmful gases from exhaust fumes, such as sulfur dioxide, nitrogen oxides, and volatile organic compounds. 3. **Secondary treatment**: If the exhaust gas after primary treatment still contains harmful substances, secondary treatment is required. Secondary treatment usually includes processes such as absorption, adsorption, condensation, and catalytic oxidation to further purify exhaust gases. 4. **Emissions**: The treated exhaust gases are finally released into the atmosphere through chimneys. Before emission, refineries typically test their exhaust gases to ensure that the concentration of pollutants in them is within specified limits. In addition to the aforementioned physical and chemical treatment methods, some refineries also employ biological treatment techniques, such as microbial treatment, to further purify exhaust gases. .

1. If the oxygen content in the exhaust gas is within the acceptable range, it can be sent to the low-wattage system. 2. If the oxygen content is high, consideration can be given to using a CO incinerator or an exhaust gas incinerator for sulfur removal