Treatment of exhaust gases in the adipic acid production process
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The current mainstream process for producing adipic acid is the cyclohexane and cyclohexene method, but this process has certain drawbacks, as it generates waste liquids, waste gases, and waste residues during production. These days, the issue of global warming is becoming increasingly prominent. What are your insights on how to handle the exhaust gases generated during the production of adipic acid?
Waste gas treatment for nitric acid plants: The NOx content in the gas emitted from the top of the absorption tower is approximately 1300 ppm. After passing through a secondary air cooler, an exhaust gas preheater, and a high-temperature gas-to-gas heat exchanger, the temperature is raised to 360°C before the gas enters the ammonia conversion and reduction reactor, where it reacts with ammonia gas from the ammonia evaporator to remove NOx from the exhaust gas, resulting in a NOx content of ≤200 ppm(v) in the exhaust gas. The exhaust gas enters an exhaust gas expander for energy recovery; the temperature of the gas exiting the expander drops to around 110°C, and it is then discharged through a high chimney to meet the requirements for atmospheric pollutant emissions. As people’s demands for the quality of their living environment increase and environmental standards become stricter, it is necessary to start researching technologies for the recovery and treatment of NOx.
The exhaust gases in nitric acid plants are mainly removed through ammonia reduction. The remainder is then fed into incineration equipment, where it is saponified and the diester is recovered. That’s all I know; I’m not sure if it’s correct, hehe.
The exhaust gases in acid plants are primarily treated using selective catalytic reduction technology, namely the SCR process
I would like to ask what the exhaust volume is for a 150,000 tons per year adipic acid plant?
Adipic acid also contains another important greenhouse gas, N2O. The treatment of this gas does not rely on the SCR process using reducing agents, as is the case with common NOx gases such as NO and NO2; instead, a catalyst is used directly.
Reply to 1# BGLG, hello! Is our factory also building an exhaust gas treatment system? Could you please send me your information on the treatment of nitrogen oxides? Thank you so much! 5651106.love@163.com
Reply to 2# BGLG, hello! Is our factory also building an exhaust gas treatment system? Could you please send me your information on the treatment of nitrogen oxides? Thank you so much! 5651106.love@163.com
Reply to 3# tsxysxl: Hello! Is our factory also building an exhaust gas treatment system? Could you please send me your information on the treatment of nitrogen oxides? Thank you so much! 5651106.love@163.com
Reply to 4# wbch520: Hello! Is our factory also building an exhaust gas treatment system? Could you please send me your information on the treatment of nitrogen oxides? Thank you so much! 5651106.love@163.com
Reply to 6# will-wang: Could you provide a detailed explanation of the SCR method? Thank you