This project contract was signed on May 21, 2020. The project commenced production in July 2020 and completed the manufacturing, installation, and commissioning of devices within 50 days.

The project handles waste gases generated by the rare gas processing room using nitric acid silver solution reactors, with nitrogen oxide concentrations reaching 25,000 mg/m³. The required emission concentration is less than 100 mg/m³.

The treatment process involves a two-stage bubble absorption system, three-stage spray system, and two-stage alkaline solution mist treatment system.

After three months of operation, Hefei Qidu Membrane Co., Ltd., a subsidiary of Qidu Group, signed a nitrogen oxide waste gas treatment contract with our company. This is the highest recognition of our company's capabilities in handling high-concentration nitrogen oxide waste gases.