Environmental impact assessment for Xinjiang Xinxinxin’s 60,000 tons/year polyoxymethylene project approved!
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Environmental impact assessment for Xinjiang Xinxinxin’s 60,000 tons/year polyoxymethylene project approved! Author/Source: Yahuahua Coal Chemical Industry. Date: 2021-01-07. Clicks: 20. On January 5, 2021, the Environmental Impact Assessment and Emission Management Department of the Xinjiang Uygur Autonomous Region’s Department of Ecology and Environment issued a public notice regarding the decision to approve the environmental impact assessment documents for the proposed construction projects. The public notice period is from January 5, 2021, to January 11, 2021 (5 working days). Project Name: 60,000 tons/year Polyoxymethylene Project of Xinjiang Xinlianxin Energy and Chemical Co., Ltd.Location: Tahe Industrial Park, Manas County, Changji Hui Autonomous Prefecture
Developer: Xinjiang Xinlianxin Energy and Chemical Co., Ltd.
Environmental Impact Assessment Agency: Urumqi Hengda Lan Tian Environmental Protection Technology Co., Ltd.
Project Overview: This project is of the renovation and expansion type. The main construction is a polyoxymethylene resin production line with an annual production capacity of 60,000 tons. Main environmental impacts and strategies and measures to prevent or mitigate adverse environmental impacts: 1. The main air pollution control measures to be adopted are as follows: During the construction period, dust generated by transport vehicles will be controlled primarily by reducing vehicle speeds and using water to suppress dust. To address diesel engine exhaust emissions, high-quality diesel is primarily used. Operation period: (1) The formaldehyde absorption tower in the formaldehyde production unit fails to absorb the waste gas; the main pollutants are formaldehyde, methanol, and non-methane hydrocarbons, which are sent to the ECS catalytic incineration system for treatment. ⑵Non-condensable gases from the methanol scrubber in the formaldehyde concentration unit, as well as those from the formaldehyde scrubber; the main pollutants are formaldehyde and methanol ； Non-condensable gases from the polyoxymethylene production and dilute aldehyde recovery units, exhaust gases from the extraction towers, non-condensable gases from the light boiling tower, non-condensable gases from the heavy boiling tower, non-condensable gases from the polyoxymethylene recovery tower, non-condensable gases from the methanol recovery tower, and non-condensable gases from the formaldehyde recovery tower; the main pollutants are formaldehyde, methanol, polyoxymethylene, benzene, and total non-methane hydrocarbons ； Dioxolane unit reactions include non-condensable vapor from reaction, non-condensable vapor from concentration, non-condensable vapor from reboiling, and non-condensable vapor from light boiling; the main pollutants are formaldehyde and total non-methane hydrocarbons. The aforementioned waste gas is treated in the triomethylene formaldehyde unit waste gas recovery tower; the removal rates for the main pollutants are ≥85% for methanol and formaldehyde, ≥60% for triomethylene formaldehyde, and ≥5% for benzene. The waste gas is then sent to the ECS incineration system for further treatment. ⑶The gas phase from the cyclone separator in the polymerization and post-treatment unit (unreacted gas from polymerization), whose main pollutants are formaldehyde, total non-methane hydrocarbons, and trimethylolpropane, is sent to the ECS incineration system for treatment. The ECS catalytic incineration system achieves a removal rate of 95% for the main pollutants. The exhaust gases are released through a 30-meter-high exhaust stack, and the methanol emission concentration complies with the emission limits specified in Table 6 of the \"Emission Standards for Pollutants in the Petrochemical Industry\" (GB31571-2015). The emission concentrations of formaldehyde, non-methane hydrocarbons, and benzene meet the emission limits set out in Table 5 of the \"Emission Standards for Pollutants in the Synthetic Resin Industry\" (GB31572-2015). ⑷The condensation of non-condensable gases in the polymerization and post-treatment units, as well as the vacuum exhaust gas from the extruder (formaldehyde-containing exhaust), have formaldehyde and total non-methane hydrocarbons as the main pollutants; these gases are sent to a scrubber for treatment. ⑸The dried exhaust gas from the POM particle polymerization and post-treatment unit, as well as the exhaust gas collected in the packaging workshop, contain particulate matter, formaldehyde, total non-methane hydrocarbons, and benzene as the main pollutants. These gases are treated using bag filters, with a dust removal efficiency of ≥99%; thereafter, the exhaust gas is sent to a scrubber for further treatment. The dust removal efficiency of the scrubber is ≥50%, the formaldehyde removal rate is ≥85%, and the removal rate of non-methane hydrocarbons is ≥60%. The exhaust gases are discharged through a 35-meter-high exhaust stack, and the emission concentrations of particulate matter, formaldehyde, and non-methane hydrocarbons meet the emission limits specified in Table 5 of the \"Emission Standards for Pollutants in the Synthetic Resin Industry\" (GB31572-2015). ⑹A new wastewater treatment plant is constructed to capture waste gases; the main pollutants involved are hydrogen sulfide, ammonia, formaldehyde, and non-methane hydrocarbons. Through a treatment process of \"pre-washing + biological filter\", 90% of ammonia and hydrogen sulfide are removed, while 60% of formaldehyde and non-methane hydrocarbons are removed. The waste gases are discharged through exhaust stacks 15 meters high. The emission rates of ammonia and hydrogen sulfide comply with the standards specified in Table 2 of the \"Emission Standards for Odorous Pollutants\" (GB14554-93), whereas the emission concentrations of formaldehyde and non-methane hydrocarbons meet the limits set out in Table 5 of the \"Emission Standards for Pollutants in the Synthetic Resin Industry\" (GB31572-2015). II. The main water environment protection measures to be adopted are: the construction wastewater will be settled during the construction period and then reused, while domestic sewage will be treated at the existing project sewage treatment plant. During the operation period, 43 cubic meters per hour of wastewater flows from the bottom of the formaldehyde recovery tower; the main pollutants are chemical oxygen demand, formaldehyde, and suspended solids. ⑵The reaction waste liquid containing dioxolane units amounts to 0.2 cubic meters per hour; the main pollutants are formaldehyde, dioxolane, and ethylene glycol ； Alkali recovery organic waste liquid: 0.003 cubic meters per hour; the main pollutants are methanol and dioxolane. ⑶The wastewater from the polymerization and post-treatment units as well as that from the scrubber towers amounts to 21 cubic meters per hour; the main pollutants are chemical oxygen demand, methanol, and suspended solids. ⑷The amount of domestic wastewater is 20,000 cubic meters per year; the main pollutants are chemical oxygen demand, five-day biochemical oxygen demand, and ammonia nitrogen. This wastewater is sent to the newly built wastewater treatment plant for treatment. ⑸The dioxolane unit’s concentration tower discharges 0.06 cubic meters per hour of dilute formaldehyde; the main pollutants are formaldehyde, methanol, dioxolane, formic acid, and ethylene glycol, which are sent to the formaldehyde recovery tower for treatment. ⑹The alkaline solution at the bottom of the dioxolane unit’s alkali recovery tank, whose main contaminant is sodium hydroxide, is sent to the buffer tank at the bottom of the absorption tower as a neutralizing agent for wastewater. ⑺The reconstituted fraction from the dioxolane unit’s reboiler is 0.03 cubic meters per hour; the main pollutants are dioxolane and salts, which are sent to the formaldehyde recovery system in the triomethylenemethane unit for treatment. III. The main noise pollution prevention measures to be taken are: the use of low-noise equipment ； High-noise equipment should be placed in a separate machine room, and vibration-damping, sound-insulating, sound-absorbing, and noise-reducing devices should be installed for such equipment ； The factory building uses sound-insulating building materials, sound-insulating windows, and sound-insulating doors ； A green belt is installed at the factory boundary. The predicted values of environmental noise at the factory boundary during day and night meet the limits set for Class 3 sound function areas in the \"Standards for Environmental Noise Emissions at the Boundaries of Industrial Enterprises\" (GB12348-2008). IV. The main measures to be taken for the prevention and control of solid waste pollution are as follows: construction waste during the construction period will be transported to the Jiarun Solid Waste Storage Facility in Manas County for disposal, while domestic waste will be collected and handed over to the sanitation department for removal and disposal. The solid waste generated during the operation period mainly includes 6 tons per year of sludge from the sewage treatment plant, which falls under hazardous waste category HW13. 2. Waste packaging materials and waste personal protective equipment amount to 15 tons per year, and are classified as hazardous waste of category HW49. The aforementioned hazardous waste is temporarily stored in the existing hazardous waste storage area for construction projects, and is then handed over to a qualified hazardous waste disposal facility for treatment. 3. 30 tons of used heat transfer oil per 5 years is classified as hazardous waste of type HW10; it is not stored on-site but is handed over to qualified hazardous waste treatment facilities for disposal. 4. 9.6 tons of spent molybdenum catalyst per 2 years, and 0.5 tons of spent platinum-palladium catalyst per 5 years; these are classified as hazardous waste of type HW50 and are recovered by the catalyst manufacturers. 59.2 tons of household waste per year are collected and then handed over to the sanitation department for disposal. V. The main environmental risk prevention measures to be adopted are: rational layout of the general plan ； Standardize the storage and transportation of hazardous materials ； The production process makes use of automatic control systems, and detection and alarm systems for flammable and toxic gases, as well as automatic interlock protection or emergency shutdown systems, are installed; gas safety valves are provided for each device ； Interception ditches are installed around the production unit area, while cofferdams are set up in the tank area ； Suppose fire prevention, explosion protection, lightning protection, static electricity prevention, and fire-fighting facilities ； Accident wastewater is collected in the existing accident tanks for the project and then sent to wastewater treatment facilities for processing ； Develop comprehensive emergency plans for environmental risks, and activate them immediately in the event of an accident.
Korla also has a polyoxymethylene project
On June 10, the polyoxymethylene production project of Xinjiang Guozhong Xinxing New Materials Technology Co., Ltd., which involves an investment of 1.489 billion yuan and a annual production capacity of 80,000 tons, began construction in the Zhundong Development Zone. This is one of the important outcomes of the development zone’s efforts to attract investments, improve the business environment, and facilitate the implementation of such projects. The project covers an area of 200 mu. It relies primarily on Xinjiang Yihua Chemical’s 30,000-ton methanol production capacity and the steam from power plants that supply electricity to other areas in Xinjiang to build a first-phase production facility capable of manufacturing 40,000 tons per year of polyoxymethylene, as well as a 130,000-ton per year facility for producing formaldehyde. Additionally, there are various auxiliary production devices and facilities such as those for wastewater treatment, refrigeration, incineration, nitrogen production, air compression, and packaging. Once completed, each phase of this facility will be able to produce 40,000 tons of polyoxymethylene per year. It is understood that polyoxymethylene is the third most widely used engineering plastic, with production capacity only surpassed by nylon and polycarbonate; it is known as a material that can replace steel. It can be used extensively as a substitute for metal materials such as steel, copper, zinc, and aluminum. Currently, it is primarily utilized in industries such as automobiles, electrical equipment, machinery manufacturing, precision instruments, military applications, construction, and sports.
On June 1, 2020, Wang Guojian, Deputy Secretary of the Yiwu County Party Committee, visited the company to discuss the implementation of the 60,000 tons per year polyoxymethylene project carried out by Henan Energy in Hami. Shang Guan Shumin, Secretary of the Party Committee and Chairman of the Xinjiang Company, had in-depth discussions with the visiting guests. Both sides stated that they would enhance communication and cooperation to accelerate the preliminary work for the project and facilitate its early commencement. From May 29th to 31st, a research team from Henan Energy visited Yiwu County and the Naomaohu Industrial Park to investigate matters related to the implementation of the polyoxymethylene project, and held discussions with the relevant authorities in Yiwu County, Xinjiang Guanghui New Energy, and Jiangna New Materials Company. Yiwu County provided detailed answers to questions regarding issues such as environmental capacity, pollutant emissions, site selection for the Henan Energy polyoxymethylene project, overall energy consumption, and guarantees for industrial water and electricity supply. It also established a project coordination and promotion leadership team ； Henan Energy and Guanghui New Energy have reached a cooperation agreement on ensuring the supply of 80,000 tons per year of methanol raw materials ； Henan Energy has also reached a preliminary agreement with Jiangna New Materials Company on a joint venture for steam supply and the polyoxymethylene project. Through this investigation, all the external conditions necessary for the implementation of Henan Energy’s 60,000 tons per year polyoxymethylene project have been met. Next, Henan Energy will accelerate its internal decision-making process and expedite the completion of preliminary procedures such as project registration, so as to start construction as soon as possible. Another update: On June 1, a 10-member delegation from Henan Energy’s research team focused on the chemical industry development in Xinjiang visited Zhongrun Coal Industry and Jundong Hezhu No. 4 Company for inspections. Wang Liwei, the deputy general manager of the Xinjiang company, participated in the research. The inspection team focused on learning about the progress of projects such as the 4 billion cubic meter coal-to-natural gas project in Zhundong, the Jijihu West mine, the Longyu Erdaoshalang mine, and the Shalhu mining area plan, and also conducted a visit to Xinyou Power Plant for investigations. (Source: Henan Energy Group)
On March 4, 2020, Yuntianhua issued a announcement regarding the investment in a new polyoxymethylene production project. The main contents of the announcement are as follows: To leverage Yuntianhua’s leading advantages in polyoxymethylene production technology, further strengthen the company’s market competitiveness in the polyoxymethylene industry, accelerate the adjustment of the company’s product portfolio by increasing the share of high-value chemical products such as polyoxymethylene, and enhance the company’s sustainable development capabilities and overall competitive strength. Xinjiang Yunjutian New Materials Co., Ltd., a wholly-owned subsidiary of the company (hereinafter referred to as “Xinjiang Yunjutian”), plans to invest 1.36588 billion yuan to build a project with an annual production capacity of 60,000 tons of polyoxymethylene. Project Name: 60,000 tons/year Polyoxymethylene Project ； Investing entity: Xinjiang Yunju Tian New Materials Co., Ltd., a wholly-owned subsidiary of the company ； Main contents of the project investment: construction of a 200,000-ton/year formaldehyde plant and a 60,000-ton/year polyformaldehyde plant ； Project investment amount and source of funds: The total investment for the project is 1,365.88 million yuan, with the funds coming from raised capital as well as the company’s own funds ； Project location: Shihu Tan New Materials Industrial Park, Shihezi, Xinjiang ； Investment progress and project construction period: The project will be advanced as soon as possible based on the project feasibility study report, with an estimated construction period of 2 years.