Pre-approval public notice for the hydrogen peroxide project at Anhui Jinmei Zhongneng Chemical Industry

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Public Notice Prior to Approval of the Hydrogen Peroxide Project at Anhui Jinmei Zhongneng Chemical Industry Author/Source: Fuyang People’s Government Office Date: 2020-03-10 Clicks: 107 In accordance with the relevant regulations regarding the approval of environmental impact assessments for construction projects, after examination, our department intends to issue an approval decision regarding the \"Environmental Impact Assessment Report for the Green and Intelligent Comprehensive Utilization of Syngas Resources by Anhui Jinmei Zhongneng Chemical Co., Ltd.\" To ensure the seriousness and fairness of the approval process as well as to uphold the public’s right to be informed, the basic information regarding the environmental impact assessment documents for this project is being made public for a period of 10 working days. If you have any comments, please submit them in writing to the Environmental Protection Bureau counter at the Municipal Government Service Center during the public comment period. Project Name: Green and Intelligent Comprehensive Utilization Project of Syngas Resources
Construction Unit: Anhui Jinmei Zhongneng Chemical Co., Ltd.
Location of Construction: Linquan County, Anhui Province
Environmental Impact Assessment Report Prepared By: Anhui Chemical Industry Research Institute
Project Overview: The project is located within the existing factory complex of Anhui Jinmei Zhongneng Chemical Co., Ltd. It makes use of air released from ammonia synthesis systems, vapor from storage tanks, gas emitted from ammonia storage tanks, as well as gas obtained from the purification and degassing processes of ammonia synthesis to efficiently purify hydrogen for use as a raw material in the production of hydrogen peroxide. This approach transforms traditional ammonia and urea products into green hydrogen peroxide products ； This project is planned to be implemented in two phases. In the first phase, a hydrogen peroxide production facility with a capacity of 200,000 tons per year (27.5%) is to be built, along with a facility for producing 50% hydrogen peroxide with a capacity of 60,000 tons per year. Additionally, utility and auxiliary facilities such as a cooling water circulation system, air compressor stations, sewage pretreatment units, and intermediate storage tanks will also be constructed. In the second phase, a new hydrogen peroxide production facility with a capacity of 200,000 tons per year (27.5%) will be built, along with a supporting facility for the production of 50% hydrogen peroxide with a capacity of 60,000 tons per year. The utility systems, auxiliary facilities, and wastewater pretreatment units will primarily rely on those from the first phase. Environmental impacts and countermeasures: 1. Exhaust gases: (1) Exhaust gases from the 27.5% hydrogen peroxide production unit – vacuum non-condensable exhaust gases from the catalyst stripping in the hydrogenation tower, vacuum non-condensable exhaust gases from the activated alumina stripping in the hydrogenation tower’s clay bed, vacuum non-condensable exhaust gases from the activated alumina stripping in the post-treatment clay bed, exhaust gases generated during catalyst regeneration, and exhaust gases from tank ventilation. These gases are collected through exhaust ducts and, together with the exhaust gases from the oxidation tower, are processed using an expansion refrigeration unit for deep cooling followed by secondary adsorption using activated carbon fibers. The treated exhaust gases are then released through exhaust stacks that are 30 meters high. (2) Non-condensable gases from the hydrogenation liquid storage tank and those from methanol distillation. The main pollutant in the non-condensable gases from the hydrogenation liquid storage tank in this project is heavy aromatics; these gases are treated using activated carbon adsorption before being released through an exhaust stack 20 meters high. The non-condensable off-gases from methanol distillation are first treated with two stages of water absorption; thereafter, together with the non-condensable off-gases from the hydrogenation liquid tank, they are subjected to activated carbon adsorption before being released through a 20-m-high exhaust stack. The methanol emission concentration meets the emission limit requirements specified in Table 6 of the \"Emission Standards for Pollutants in the Petrochemical Industry\" (GB31571-2015) ； The emission concentration of non-condensable gases, expressed as total hydrocarbons other than methane, meets the emission limits specified in Table 5 of the \"Emission Standards for Pollutants in the Petrochemical Industry\" (GB31571-2015). The environmental protection distance for this project is 300 meters. Given that the environmental protection distance for the \"Energy-Saving Technical Transformation Project for the Adjustment of the Raw Material Route for 600,000 tons/year of synthetic ammonia\" is 800 meters, the environmental protection distance for this project falls within this range; therefore, no new environmental protection distance needs to be established, and the environmental protection distance around the factory site remains 800 meters. 2. Wastewater: The wastewater generated in this project includes wastewater from working fluid washing, wastewater from aromatic hydrocarbon intermediate tanks, wastewater from the evaporation and condensation of dilute alkaline solutions, wastewater from the regeneration of catalysts, clay beds, and activated carbon fibers, wastewater from floor cleaning, wastewater from the regeneration of resins in purification units, wastewater from exhaust gas absorption systems, wastewater from the replacement cycle of the cooling system, as well as initial rainwater. All of this wastewater first passes through the pretreatment station designed for hydrogen peroxide-related wastewater before being sent to the company’s No. 3 sewage treatment plant for further processing. The quality of the effluent water meets the indirect emission limit requirements specified in Table 2 of the \"Emission Standards for Water Pollutants in the Synthetic Ammonia Industry\" (GB13458-2013), as well as the requirements set for the wastewater treatment plant in Linquan Economic Development Zone. 3. Solid waste: Waste activated alumina, waste resin, and waste catalysts are considered hazardous waste; they are entrusted to qualified entities for transportation and disposal, and are not stored temporarily on site. The residue from methanol distillation consists mainly of methanol and is considered a hazardous solid waste; it is planned to be sent to the company’s wastewater treatment plant for use as a carbon source. Waste activated carbon, physical-chemical sludge from wastewater pretreatment units, and major components such as heavy aromatics and carbon fibers are classified as hazardous waste. After being replaced regularly, they are temporarily stored in the company’s existing hazardous waste storage area, where they are then disposed of by qualified entities.