Public notice on the environmental impact assessment for the 1 million-ton coal-to-oil demonstration project in Yitai Yili

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This post was last edited by liaifeng on 2018-9-10 at 20:18. Public notice regarding the environmental impact assessment of the 1 million tons per year coal-to-oil demonstration project in Yitai Ili. Author/Source: Date: 2017-02-04. Views: 54. In accordance with the relevant regulations regarding the approval process for environmental impact assessments of construction projects, the Ministry of Environmental Protection plans to review the environmental impact assessment documents for the 1 million tons per year coal-to-oil demonstration project carried out by Yitai Ili Energy Co., Ltd. To ensure the seriousness and fairness of the review process, the basic information regarding the environmental impact assessment document to be reviewed is being made public. The public display period is from January 18, 2017, to January 24, 2017 (5 working days). It is understood that the total investment in this project amounts to 1,632,218.96 million yuan. The project is located within the \"Yitai Yili Industrial Park\" in Hainuk Township, Chabuchar Xibe Autonomous County, Yili Kazakh Autonomous Prefecture, Xinjiang Uygur Autonomous Region. The production capacity is 1 million tons of petroleum products per year, with the main products being liquefied petroleum gas, naphtha, diesel, etc. The main process units include facilities for air separation, coal gasification, gas purification, oil synthesis, hydrogen production from exhaust gases, and oil processing; the utility systems comprise thermal power plants, water treatment plants, circulating cooling water systems, chemical water treatment stations, air compression stations, and substation; the storage and transportation systems include systems for storing and transporting raw coal, intermediate tank areas, finished product tank areas, and oil loading systems. In December 2015, the environmental impact assessment report for Yitai Ili Energy Co., Ltd.’s 1 million tons per year coal-to-oil demonstration project was accepted by the **Ministry of Environmental Protection. In July 2014, the **Development and Reform Commission granted Xinjiang’s first coal-to-oil demonstration project – Yitai Yili Energy Co., Ltd.’s 1 million tons per year coal-to-oil demonstration project – the approval needed to carry out the preliminary work. Furthermore, on October 10, 2016, a final review meeting for the application report of Inner Mongolia Yitai Coal-to-Oil Co., Ltd.’s 2 million tons per year coal indirect liquefaction demonstration project was held in Beijing. It is understood that this project uses the coal resources owned by Yitai Group as raw materials, and through advanced coal-to-oil technologies, it produces oil products such as diesel and naphtha as its main outputs. The annual production capacity of the main products is 2.1535 million tons, of which 1.3891 million tons are diesel, 480,400 tons are naphtha, 176,300 tons are LPG, and 107,700 tons are LNG. In addition, 157,700 tons of by-products such as mixed alcohols, sulfur, and ammonium sulfate are produced each year. Publication status: Project name: Itai Ili Energy Co., Ltd. 1 million tons/year coal-to-oil demonstration project. Location: Chabuchar Xibe Autonomous County, Ili Kazakh Autonomous Prefecture, Xinjiang Uygur Autonomous Region. Constructor: Itai Ili Energy Co., Ltd. Environmental impact assessment agency: China National Petroleum Corporation Northeast Refining & Chemical Engineering Co., Ltd. Project overview: The project uses local coal as raw material and employs processes such as water-coal slurry gasification and Fischer-Tropsch synthesis to produce 687,000 tons/year of diesel, 244,100 tons/year of naphtha, and 84,100 tons/year of liquefied petroleum gas. The construction contents mainly include: (1) Main plant: production units such as air separation, coal gasification, purification, oil synthesis, exhaust gas hydrogen production, and oil processing. (2) Utility systems: thermal power plants (coal-fired boilers, etc.), water treatment plants, circulating cooling water systems, chemical water treatment stations, etc. (3) Storage and transportation engineering: coal preparation systems, tank farms, warehouses, etc. (4) Environmental protection projects: wastewater treatment systems, recycled water systems, exhaust gas treatment facilities, flare systems, etc. The total investment for the project is 16.322 billion yuan, of which 2.30752 billion yuan is allocated to environmental protection measures, accounting for 14.14% of the total investment. Main environmental impacts and countermeasures to prevent or mitigate adverse environmental impacts: Main environmental impacts and measures: (1) Air: The dust-containing exhaust gas from the coal preparation system of thermal power plants is treated using bag filters, and is discharged after meeting the secondary standards set by the \"Integrated Emission Standards for Air Pollutants\" (GB16297-1996). The exhaust gas from low-temperature methanol washing is washed with water, and is discharged after meeting the special emission limits specified in the \"Emission Standards for Pollutants in the Petrochemical Industry\" (GB131571-2015). Acidic gases are treated using a two-stage Claus process plus incineration, and the flue gas from incineration is sent to the desulfurization system of the thermal power plant boiler. The boiler flue gas is desulfurized using the limestone-gypsum method, denitrified via SCR, and cleaned through high-efficiency bag filters combined with wet electrostatic precipitators; it is then released after meeting ultra-low emission standards. The foul gases generated by the sewage treatment equipment and the production wastewater storage tanks are collected in a sealed manner, and after being treated through spraying, biological deodorization, and activated carbon adsorption, they are discharged after meeting the requirements of the \"Emission Standards for Pollutants in the Petroleum Refining Industry\" (GB131570-2015) and the \"Emission Standards for Foul Smelling Pollutants\" (GB14554-93). A Leak Detection and Repair (LDAR) program is implemented in the plant area, and oil vapor recovery facilities are installed in the oil storage tanks and loading/unloading areas. During abnormal operating conditions such as startup, shutdown, and maintenance, process waste gases are sent to the flare system for combustion. (2) Surface water: Under normal operating conditions, the wastewater generated on site is subjected to pretreatment, biological treatment, and advanced treatment before being reused entirely, with no discharge outside the facility. High-concentration brine is treated using membrane concentration and evaporation crystallization processes, and the resulting crystallized salt is utilized in a resource-efficient manner. Under abnormal operating conditions, the wastewater is sent to a temporary wastewater storage tank; once the wastewater treatment system returns to normal, it is sent back to the relevant treatment units for further processing. The process system shuts down when the level in the temporary storage tank reaches 90%. (3) Groundwater: On the basis of zone-based seepage control in accordance with the \"Technical Specifications for Seepage Control in Petrochemical Projects\" (GB/T 50934-2013), the seepage control level for the floors and production wastewater ditches in the oil product production areas, oil product storage and transportation areas, chemical storage and transportation areas, and acid-base tank areas, where organic liquid materials are handled, is upgraded from a regular seepage control area to a high-priority seepage control area. A total of 11 groundwater monitoring wells have been installed in the factory area and its surrounding areas. (4) Environmental risks: Level-3 prevention and control facilities for environmental risk incidents are installed at the plant site; in the event of an incident, wastewater is directed into the accident tank. It proposes the principles and general requirements for formulating emergency plans for environmental risks, and establishes an emergency response coordination mechanism between the project developer and local relevant departments. A flood diversion channel will be installed on the south side of the South Ring Road in the park. The park is equipped with an accident pool with a total volume of 600,000 cubic meters. Shut-off gates are installed at the rainwater discharge pipelines on the north side of the plant, at the point where the rainwater diversion channels flow into the Gursuhu Gully, and in front of the culvert where the Gursuhu Gully crosses the Ikhan Highway. (5) Solid waste: Boiler ash and slag are utilized comprehensively; waste catalysts and waste lubricating oil are recovered by the manufacturers. Residues from oil product synthesis such as stable waxes, biochemical sludge, and contaminated oil are sent to the Qinghua Hazardous Waste Disposal Center in Ili Prefecture for incineration, while other solid wastes are disposed of in the designated landfills within the industrial park. Public participation: Public participation is facilitated through methods such as newspaper and online announcements, holding symposiums, posting notices, and conducting surveys, with the full report also being made available to the public. A total of 35 group opinion questionnaires and 520 individual opinion questionnaires were distributed. The survey results show that 35 organizations and 451 respondents supported the project construction, 69 respondents said it didn’t matter to them, and no one was opposed. Process Technical Solution The key technologies for this project include high-temperature slurry-bed F-T synthesis technology and the processing technology for F-T synthesized oil products (HTSFTP?). The F-T synthesis technology and the processing technology for F-T synthesized oils are coal-to-oil technologies with independent intellectual property rights, developed by China Science Synthetic Oil Technology Co., Ltd. (referred to as HTSFTP?). The coal gasification unit employs the water-coal slurry gasification process, with the multi-nozzle coal gasification technology developed by East China University of Science and Technology being chosen for this purpose. Aside from these three key technologies, the other technologies utilized in this project are all mature and advanced ones available both domestically and internationally. The energy conversion efficiency of this project is as high as 42.47%; 3.65 tons of raw coal (on a standard coal basis) are required per ton of oil produced, and 6.59 cubic meters of water are needed per ton of oil. All these parameters meet the requirements set out in the \"Guiding Principles for Regulating Coal-based Fuel Demonstration Projects\". Overall processing flow: This project includes 6 production units for air separation, hydrogen production from exhaust gas, coal gasification, purification, oil synthesis, and oil processing, along with the supporting utility systems and plant-wide facilities. Status of the main project: Air separation unit. The scale of this project is 1 million tons per year of coal-to-oil production; 3 sets of air separation units will be constructed, with each set having an oxygen production capacity of 108,000 standard cubic meters per hour. There is also a backup system consisting of two liquid nitrogen storage tanks with a capacity of 2,500 cubic meters each. The device's load adjustment range is 75~105%. An air separation unit includes air compression, air purification, air separation, liquid product storage, and gas processing steps. The coal gasification unit utilizes the multi-nozzle opposed water-coal slurry gasification technology jointly developed by East China University of Science and Technology and Yankuang Group; the designed processing capacity per furnace for raw coal is 3,465 tons per day. It is planned to install 5 multi-nozzle gasification furnaces of model Ф4200 (4 in operation and 1 as backup), with a gasification pressure of 4.2 MPa(G); the effective gas production capacity of each furnace is 169,000 standard cubic meters per hour ； The coal slurry preparation section is equipped with 7 rod mill systems (6 in operation and 1 as backup). To increase the concentration of the coal slurry, 9 CYM-11000 type fine mills have been added to work in conjunction with the 6 rod mills ； The graywater treatment section is equipped with 5 sets of flash vaporization systems. Purification unit: This unit consists of 2 sets of conversion units, 2 sets of low-temperature methanol washing units, 2 sets of desulfurization units, 2 sets of refrigeration units, 1 set of acid water stripping unit, and 2 sets of sulfur recovery units with a processing capacity of 2×80 tons per day. Oil synthesis unit: The oil synthesis unit includes units for F-T synthesis, reduction, wax filtration, decarburization, etc. F-T synthesis reactor, 1 wax filtration system, 1 decarburization system, 1 reduction system. Exhaust gas hydrogen production system: The various units of the exhaust gas hydrogen production system are as follows: 1 series of membrane separation units, 1 series of exhaust gas conversion units, 1 series of exhaust gas transformation units, and 2 series of PSA units. The oil processing facilities at Yili Yitai Engineering include: 1 set of hydrorefining units (1.05 million tons per year), 1 set of hydrocracking units (0.719 million tons per year), 1 set of low-temperature oil washing units (0.2757 million tons per year), and 1 set of synthetic water treatment units (1.3 million tons per year).