[Haichuan Chemical News] Baota Petrochemical’s 600,000-ton-per-year catalytic cracking flue gas regeneration unit has been successfully put into operation

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On October 16, the desulfurization-treated regenerated flue gas system of Baota Petrochemical Energy & Chemical Company’s 600,000 tons per year catalytic cracking unit successfully passed the inspection by the third-party company Ningxia Weierkang Environmental Testing Co., Ltd. The test results show that the sulfur dioxide content in the flue gas after passing through the desulfurization and denitrification devices is less than 50 mg/Nm3, the nitrogen oxide content is less than 100 mg/Nm3, and the flue gas dust content is less than 30 mg/Nm3; all of these values meet the environmental emission standards. This result marks the successful one-time commissioning of the 600,000 tons per year catalytic cracking regenerated flue gas desulfurization and denitrification unit at Baota Petrochemical Energy & Chemical Company. It is reported that at 8:30 a.m. on the 13th of this month, with all necessary support measures in place—including water, electricity, wind power, steam, tools, personnel, and relevant auxiliary materials—employees from the catalysis workshop at Baota Petrochemical Energy & Chemical Company followed the trial operation plan for desulfurization and denitrification. They poured water into the desulfurization tower, started its circulation pump and mixer, activated the oxidation fan, used cooling water for the oxidation air, fed catalytic flue gas into the system, and added alkaline solution to the tower to maintain a pH level of 5.5–6.5. The temperature before dust removal was 185°C. After three hours of adjustments, the desulfurization and denitrification system operated properly, preparing it for subsequent tests. The 600,000 tons per year catalytic cracking regenerated flue gas desulfurization, denitrification, and dust removal facility was a key technical renovation project for Baota Petrochemical Energy & Chemical Company during the 2017–2018 period. Construction began on October 25, 2017, and it was successfully completed on May 25 of this year. The engineering project adopts a process route of \"high-efficiency bag dust removal + ozone oxidation for denitration + wet desulfurization using sodium hydroxide solution\", and is composed of units such as the dust removal system, desulfurization system, denitration system, and supporting facilities. It features a simple process, rational layout, automated operation, and easy maintenance. It is capable of handling 100,000 Nm3/h of catalytic flue gas, and can significantly reduce sulfides and nitrogen oxides in such gas, ensuring emissions meet regulatory standards. As an important part of a company’s sustainable development, the 600,000 tons per year catalytic cracking regenerated flue gas desulfurization and denitrification facility has received strong support from Baota Petrochemical Industry Group and relevant departments at every stage, from initial exploration and design to equipment ordering, construction organization, and commissioning. In particular, after this year’s Spring Festival, the employees of the Energy and Chemicals Company overcame various difficulties related to personnel and technology, and took every effort to accelerate the construction and commissioning of the facility, enabling it to operate successfully with flue gas emissions that meet **environmental protection standards. The successful first operation of this device is encouraging and boosts morale. It also provides valuable experience for subsequent updates and upgrades to production technologies, thereby enhancing the prospects for success.