Xinjiang Xinhuixia Clean Energy Co., Ltd. 600,000-ton crude aromatic hydrocarbons hydrogenation technology optimization project

Main environmental impacts and strategies and measures to prevent or mitigate adverse environmental impacts 1. Air pollution control measures: During the construction period, enclosed barriers are installed at the construction site, and measures such as covering the area, scheduling construction at appropriate times, and spraying water to suppress dust are taken. Operation period: The heating furnaces use desulfurized dry gas as fuel, and low-nitrogen combustion technology is employed; the flue gases resulting from this combustion are discharged in compliance with regulations through 2 exhaust stacks. The flue gases from the phenol removal feed heating furnace and the vacuum feed heating furnace are discharged together through a 56.2-m-high exhaust stack (exhaust outlet DA001), while the flue gases from the pre-hydrogenation feed heating furnace, the cracking feed heating furnace, and the distillation feed heating furnace are discharged together through a 42.2-m-high exhaust stack (exhaust outlet DA002) ； The exhaust gases from the loading and unloading station are treated using an oil and vapor recovery system (two-stage condensation + activated carbon adsorption) before being discharged through a 15-meter-high exhaust stack (DA003 emission outlet). The ammonia gas produced in the ammonia removal tower of the acidic water stripping unit is transported via pipelines to the ammonia recovery unit at the wastewater treatment plant of the clean refining facility, where it is used to produce liquid ammonia. The acidic gas removed by the hydrogen sulfide removal tower is sent via pipelines to the coal gas hydrogen production unit, where sulfur is added back to it before it enters the desulfurization system to produce sulfur; this project does not have any emission outlets ； Fixed-roof storage tanks employ oil-gas balance measures, while internal floating-roof storage tanks use high-efficiency sealing combined with oil-gas balance measures to reduce uncontrolled emissions ； Organic waste gases generated at the static and dynamic sealing points of equipment and pipelines are subject to LDAR operations in accordance with the \"Guidelines for Leak Detection and Repair in Petrochemical Enterprises\", and an LDAR information management platform is established ； Production wastewater is transported through sealed pipelines to the sewage treatment plant at the clean refining facility for treatment; all types of tanks there are enclosed, and organic waste gas treatment systems have been installed.

2. Waste water pollution control measures: During the construction period, construction waste water is reused after sedimentation treatment, while domestic sewage is sent to the Clean Refining and Chemicals Sewage Treatment Plant for processing. During operation: Phenol-ammonia wastewater is sent directly through overhead pipelines to the pretreatment and phenol-ammonia recovery unit at Stage 1 of the sewage treatment plant in the refining facility for treatment, while sulfur-containing wastewater is sent to the acidic water stripping unit in the project area for ammonia and sulfur removal ； The water purified by the acidic water stripping unit, as well as the wastewater from the circulating water station and domestic sewage, are sent to the second-stage biological treatment unit of the clean refining plant’s wastewater treatment facility for processing. The purified water is reused to replenish the circulating water system within the clean refining plant, while the highly concentrated brine is sent through pipelines to the anti-seepage storage tanks designated for such brine at the clean refining plant, where it undergoes natural evaporation. 3. Noise pollution control measures: During the construction period, the noise is mainly generated by construction machinery and transport vehicles; measures such as using low-noise equipment, conducting regular maintenance of construction equipment, and scheduling construction activities appropriately are taken. During the operation period, measures such as using low-noise equipment, basic vibration reduction, and sound insulation for the building are taken. 4. Measures for preventing and controlling solid waste pollution: During the construction period, construction waste is transported to local construction waste landfills for disposal ； Household waste is collected in trash bins and then removed and disposed of regularly by the sanitation department. During the operation period of this project, the main types of general industrial solid waste are spent molecular sieves and spent alumina, which are replaced by the manufacturer and then recycled or disposed of ； Hazardous waste mainly includes waste adsorbents, waste catalysts, waste detoxifiers, refined waste catalysts, cracking waste catalysts, waste ceramic balls, waste activated carbon, waste additive containers, waste lubricants, waste lubricant containers, waste lead-acid batteries, and waste paint containers. All of this hazardous waste is stored in existing hazardous waste storage facilities, and is disposed of by qualified hazardous waste disposal companies ； Household waste is collected in the waste bins within the factory area, and is removed uniformly by the park’s sanitation services.

Zhongzhi Weiye News | Approval Granted for New 600,000-ton Coal Chemicals Project in Xinjiang 2025-08-25 17:44 · Chemical365 Project Name: Xinjiang Xinhuixia Clean Energy Co., Ltd.’s 600,000-ton Crude Aromatic Hydrocarbons Hydrogenation Technology Optimization Project Location: Namao Lake Coal Chemicals Circular Economy Industrial Park, Yiwu Industrial Park Developer: Xinjiang Xinhuixia Clean Energy Co., Ltd. Project Overview: This project is a technical upgrade initiative; it uses waste gas and coal tar as raw materials to produce phenol oil, naphtha, diesel, No. 1 light coal tar, No. 2 light coal tar, and LPG. Main technical upgrades for the project: The main plant includes the addition of detoxification furnaces, intermediate tanks, sulfur melting vessels, and pumping equipment to the raw gas hydrogen production unit, thereby enhancing the desulfurization capacity of the off-gas ； A side extraction line was added to the raw material pretreatment unit of the coal tar hydrogenation plant to produce phenol oil; equipment such as cross-connections, steam generators, and pumps were installed in other units. Meanwhile, the process parameters of each unit were adjusted, a new naphtha product was introduced, and a diesel blending system was added to produce additional diesel products. The storage and transportation project mainly adds 2 new 1,000 m3 phenol oil storage tanks; all other tanks make use of those already existing. All public auxiliary projects rely on existing facilities. Upon completion of the project, it will produce 72,000 tons per year of phenol oil, 86,800 tons per year of naphtha, 294,300 tons per year of diesel, 22,400 tons per year of No. 1 light coal tar, 73,600 tons per year of No. 2 light coal tar, and 7,100 tons per year of LPG. The total investment for the project is 10.78 million yuan, of which 2.82 million yuan is allocated to environmental protection measures, accounting for approximately 26.2% of the total investment. Main environmental impacts and strategies and measures to prevent or mitigate adverse environmental impacts 1. Air pollution control measures: During the construction period, enclosed barriers are installed at the construction site, and measures such as covering the area, scheduling construction at appropriate times, and spraying water to suppress dust are taken. Operation period: The heating furnaces use desulfurized dry gas as fuel, and low-nitrogen combustion technology is employed; the flue gases resulting from this combustion are discharged in compliance with regulations through 2 exhaust stacks. The flue gases from the phenol removal feed heating furnace and the vacuum feed heating furnace are discharged together through a 56.2-m-high exhaust stack (exhaust outlet DA001), while the flue gases from the pre-hydrogenation feed heating furnace, the cracking feed heating furnace, and the distillation feed heating furnace are discharged together through a 42.2-m-high exhaust stack (exhaust outlet DA002) ； The exhaust gases from the loading and unloading station are treated using an oil and vapor recovery system (two-stage condensation + activated carbon adsorption) before being discharged through a 15-meter-high exhaust stack (DA003 emission outlet). The ammonia gas produced in the ammonia removal tower of the acidic water stripping unit is transported via pipelines to the ammonia recovery unit at the wastewater treatment plant of the clean refining facility, where it is used to produce liquid ammonia. The acidic gas removed by the hydrogen sulfide removal tower is sent via pipelines to the coal gas hydrogen production unit, where sulfur is added back to it before it enters the desulfurization system to produce sulfur; this project does not have any emission outlets ； Fixed-roof storage tanks employ oil-gas balance measures, while internal floating-roof storage tanks use high-efficiency sealing combined with oil-gas balance measures to reduce uncontrolled emissions ； Organic waste gases generated at the static and dynamic sealing points of equipment and pipelines are subject to LDAR operations in accordance with the \"Guidelines for Leak Detection and Repair in Petrochemical Enterprises\", and an LDAR information management platform is established ； Production wastewater is transported through sealed pipelines to the sewage treatment plant at the clean refining facility for treatment; all types of tanks there are enclosed, and organic waste gas treatment systems have been installed. 2. Waste water pollution control measures: During the construction period, construction waste water is reused after sedimentation treatment, while domestic sewage is sent to the Clean Refining and Chemicals Sewage Treatment Plant for processing. During operation: Phenol-ammonia wastewater is sent directly through overhead pipelines to the pretreatment and phenol-ammonia recovery unit at Stage 1 of the sewage treatment plant in the refining facility for treatment, while sulfur-containing wastewater is sent to the acidic water stripping unit in the project area for ammonia and sulfur removal ； The water purified by the acidic water stripping unit, as well as the wastewater from the circulating water station and domestic sewage, are sent to the second-stage biological treatment unit of the clean refining plant’s wastewater treatment facility for processing. The purified water is reused to replenish the circulating water system within the clean refining plant, while the highly concentrated brine is sent through pipelines to the anti-seepage storage tanks designated for such brine at the clean refining plant, where it undergoes natural evaporation. 3. Noise pollution control measures: During the construction period, the noise is mainly generated by construction machinery and transport vehicles; measures such as using low-noise equipment, conducting regular maintenance of construction equipment, and scheduling construction activities appropriately are taken. During the operation period, measures such as using low-noise equipment, basic vibration reduction, and sound insulation for the building are taken. 4. Measures for preventing and controlling solid waste pollution: During the construction period, construction waste is transported to local construction waste landfills for disposal ； Household waste is collected in trash bins and then removed and disposed of regularly by the sanitation department. During the operation period of this project, the main types of general industrial solid waste are spent molecular sieves and spent alumina, which are replaced by the manufacturer and then recycled or disposed of ； Hazardous waste mainly includes waste adsorbents, waste catalysts, waste detoxifiers, refined waste catalysts, cracking waste catalysts, waste ceramic balls, waste activated carbon, waste additive containers, waste lubricants, waste lubricant containers, waste lead-acid batteries, and waste paint containers. All of this hazardous waste is stored in existing hazardous waste storage facilities, and is disposed of by qualified hazardous waste disposal companies ； Household waste is collected in the waste bins within the factory area, and is removed uniformly by the park’s sanitation services. 5. Risk prevention measures: (1) Adopt zoned leakage prevention, designating the raw material tank area, product tank area, accident pool, and hazardous waste storage area as key leakage prevention zones; the raw gas hydrogen production unit area, coal tar hydrogenation unit area, acidic water stripping unit area, desulfurization unit area, and circulating water station as general leakage prevention zones; and areas outside these key and general leakage prevention zones as simple leakage prevention zones. (2) Establish a three-level prevention and control system, strengthen the management of storage, transportation, and use of chemical materials and hazardous substances, and install alarm, emergency shutdown, and emergency stop systems in accordance with relevant standards. Additionally, gas monitoring and alarm systems for flammable and toxic gases, as well as systems for dealing with accidents related to fire, explosion, and poisoning, should be put in place. (3) Regular inspections of material storage and conveying pipelines are necessary; any signs of aging or damage must be addressed promptly to prevent potential accidents. (4) Revise the emergency response plan for sudden environmental incidents, establish an emergency coordination mechanism between the project and the park management committee, local government authorities, and relevant departments, conduct regular emergency drills for such incidents, and enhance capabilities for environmental risk prevention and emergency response.

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