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First Public Announcement of the Environmental Impact Assessment Information for the Flare Gas Recycling Project of Shaanxi Shenhua Coal Chemical Group Co., Ltd. Author/Source: Shaanxi Shenhua Coal Chemical Group Co., Ltd. Date: 2021-08-23 Clicks: 32 I. Overview and Scale of the Construction Project Proposed Project Name: Flare Gas Recycling Project Location: Guapo Town, Huazhou District, Weinan City, Shaanxi Shenhua Coal Chemical Group Co., Ltd. Nature of the Project: Technical renovation Project Overview: The existing flare gas is to be thoroughly purified in order to recover and utilize the hydrogen contained in it； Optimize the internal components of some existing equipment to improve operational efficiency. The total estimated investment for the project is around 40 million yuan, and hydrogen can be recovered at a rate of 6,214 Nm3 per hour through transformation and PSA. Current engineering status and environmental protection measures Project name: Energy conservation and emission reduction technology upgrade project of Shaanxi Shenhua Coal Chemical Co., Ltd. Construction status: The production capacity is 600,000 tons of synthetic ammonia and 520,000 tons of urea per year; as by-products, 23,527 tons of sulfuric acid, 511.34 million Nm3 of oxygen, and 20,000 tons of liquid argon are produced ； The production facilities include units for coal preparation, gasification, shift conversion, gas purification, gas refining, ammonia synthesis, air separation, urea production, as well as the retrofitting of existing urea plants ； The utility systems include solid material storage and transportation, on-site thermal power plants, refrigeration systems, a central control room, a circulating water system, a sewage treatment plant, storage and transportation facilities, flares, and a comprehensive office building. At present, the energy conservation and emission reduction technical renovation project of Shaanxi Shenhua Coal Chemical Co., Ltd. has been completed, and the environmental protection acceptance inspection following completion was carried out in March 2016. Environmental protection status: ① Exhaust gases: In the ammonia synthesis plant, the coal dust generated in the raw coal silos, coal crushing units, and limestone powder silos is treated by bag filters before being discharged in an organized manner ； The off-gas from the deaerator for gray water treatment is discharged as vacuum flash steam at a high altitude through a 30-meter exhaust stack ； The stripping gas from the conversion section and the non-condensable gas exhaust from the ammonia compressor are sent to the flare system for combustion disposal, and then discharged through exhaust stacks ； The exhaust gas from the low-temperature methanol washing unit is desulfurized by washing it with sulfur-free methanol, and then discharged into the atmosphere through a 60m high exhaust stack ； The tail gas washed with liquid nitrogen is sent to the fuel gas system without being released ； The flue gas from the sulfuric acid production section is incinerated at high temperatures in an incinerator, and then discharged into the atmosphere through a 60-m tall exhaust stack ； New urea plant: The exhaust gases from the atmospheric and low-pressure absorption towers are discharged at high altitudes through exhaust stacks ； The exhaust gas from the granulation tower is discharged from the top of the 110m granulation tower ； Expansion of urea plant: Ammonia-containing inert gases are discharged through an 80m exhaust stack ； The granulation exhaust is discharged through an 80m granulation tower ； Thermal power plant: The boiler exhaust gas is subjected to SCR denitration, bag filter dust removal, and ammonia-based desulfurization before being released through the chimney ； Flare system: Gas released during startup/shutdown and in case of accidents is burned and discharged through an 80m high flare system. ②Wastewater: The domestic wastewater generated by this project is pre-treated in septic tanks, and then together with the small amount of wastewater from ash treatment, the wastewater discharged from the methanol/water separation tower in the low-temperature methanol washing section of the synthetic ammonia plant, the wastewater from ammonia synthesis, the water used for cleaning the plant floors, and the water from the WSA sulfuric acid section, it is sent to the plant’s wastewater treatment station for processing. The treated wastewater is then sent to the recirculation water station and the desalinated water station, where it undergoes further treatment at the reclaimed water treatment station. 70% of the water processed by this station is reused, while 30% is discharged into the Mayu River. ③Solid waste: The coarse slag from the gasification furnace is entrusted to Shaanxi Chengdetai Industrial Co., Ltd. for comprehensive utilization ； The fine slag from the gasifier is fed to the boiler at a ratio of 30% based on the amount of coal used as raw material, to serve as an auxiliary fuel for combustion ； Moderate-temperature and low-temperature shift catalysts, waste molecular sieve adsorbents, waste ceramic balls, waste catalysts from ammonia synthesis towers, dehydrogenation catalysts, desulfurization catalysts, and aluminum gel – all of these should be disposed of by qualified entities ； Boiler (coal ash) is disposed of by Shaanxi Piersen Chemical Co., Ltd ； The boiler slag is entrusted to Shaanxi Chengde Tai Industrial Co., Ltd. for comprehensive utilization ； Landfilling of sludge in the sewage treatment system’s sludge disposal site ； Household waste is collected uniformly by the sanitation department. ④Noise: The noise generated during the production process mainly comes from equipment such as pumps, compressors, air separation units, and boiler exhausts. During project construction, low-noise equipment is selected for use. The main noise protection measures in the installation area include sound insulation of buildings, with the equipment placed in enclosed factories or indoor spaces ； Install soundproof enclosures and silencers, and equip all rotating mechanical parts with vibration-damping and sound-insulating devices ； Noise reduction measures such as soundproof enclosures have been installed for other dispersed compressors, pumps, and similar equipment that generate significant noise. II. Name and contact information of the project owner Project owner: Shaanxi Shanhua Coal Chemical Group Co., Ltd. Address: Shaanxi Shanhua Coal Chemical Group Co., Ltd., Guapo Town, Huazhou District, Weinan City