Ningbo Huaxing Technology Co., Ltd. 160,000-ton/year Melt-Spinning Differentiated Polyester Pre-Oriented (POY) Fine Denier Filament Production Line Technical Upgrade Project
Environmental Impact Assessment Public Notice
In accordance with the "Interim Measures for Public Participation in Environmental Impact Assessment" issued by the State Environmental Protection Administration and the "Measures for Environmental Protection Management of Construction Projects in Zhejiang Province," to enable various social organizations and the public to understand and participate in the environmental impact assessment of this project, the following public notice is hereby issued. Enterprises, institutions, social organizations, and the general public are welcome to provide valuable opinions and suggestions on the environmental protection issues of this project.
I. Project Construction Overview
1. Project Name: Upgrading Project for a 160,000-ton/year Melt-Spinning Differentiated Polyester Pre-Oriented (POY) Fine Denier Filament Production Line
2. Construction Unit: Ningbo Huaxing Technology Co., Ltd.
3. Construction Location: Haidianrong Village, Longshan Town, Ningbo City, Zhejiang Province
4. Construction Scale and Content:
Ningbo Huaxing Technology Co., Ltd. plans to invest RMB 86.5 million to acquire 19,109 m² of new land north of its existing plant in Haidianrong Village, Longshan Town, Cixi City. The project will construct a new plant with a total building area of 29,356.38 m², adding one set of continuous melt-spinning polymerization equipment for polyester, four melt-spinning polyester staple fiber pre-spinning lines, five polyester staple fiber post-spinning lines, and supporting auxiliary production equipment and utilities. The project will implement a upgrading project for a 160,000-ton/year melt-spinning differentiated polyester pre-oriented (POY) fine denier filament production line.
5. Total Project Investment: The total project investment is 86.5 million yuan, with 81.5 million yuan in fixed assets and 5 million yuan in working capital.
II. Pollution Source Generation and Control Measures:
1. Waste Gas
1) PTA Feeding Dust
The main pollutant is particulate matter, which is collected, treated by a bag filter, and then discharged through a 15m high exhaust stack.
2) Polyester Process Waste Gas, EG Storage Tank Breathing Waste Gas, and Wastewater Treatment Plant Waste Gas
Polyester process waste gas includes catalyst and slurry preparation waste gas, EG/H2O separation tower waste gas, stripping tower tail gas, liquid ring vacuum pump I tail gas, liquid ring vacuum pump II tail gas, and vacuum liquid seal tank and hot well waste gas. The main pollutants are acetaldehyde, ethylene glycol, and non-methane total hydrocarbons. The main pollutant in EG storage tank breathing waste gas is ethylene glycol. The main pollutants in the wastewater treatment plant's exhaust gas are acetaldehyde, ethylene glycol, H2S, and NH3. These gases are incinerated at the existing heat transfer station and then discharged through a 45m high exhaust stack.
3) Organic waste gas from the pre-spinning workshop and oily waste gas from the post-spinning workshop
The main pollutant is non-methane total hydrocarbons. After collection, they are treated by a water spray + electrostatic precipitator and then discharged through a 15m exhaust stack, totaling two sets.
4) Exhaust gas from the heat transfer circulation system
The main pollutant is non-methane total hydrocarbons. This is addressed by enhancing forced ventilation in the workshop.
2. Wastewater
The wastewater from this project mainly consists of process wastewater, auxiliary facility drainage, and domestic sewage.
High-concentration wastewater, such as EG/H2O separation tower drainage, is pretreated in an air stripping tower. Wastewater from the polyester unit's air stripping tower, filter cleaning, polyester workshop floor flushing, oil tank wastewater,
spinning assembly cleaning, spinning workshop floor flushing, post-spinning extension wastewater, spinning workshop air conditioning drainage, domestic sewage, initial rainwater, circulating water system drainage, and concentrated wastewater from the demineralization station are all treated at the plant's wastewater treatment station to meet the direct discharge limits in Table 1 of the "Emission Standard of Pollutants for Synthetic Resin Industry" (GB31572-2015) before being discharged into the municipal sewage network. Finally, it is treated at the Cixi Eastern Wastewater Treatment Plant before being discharged. Chemical oxygen demand (COD), ammonia nitrogen, total nitrogen, and total phosphorus comply with Table 1 of the "Emission Standard of Major Water Pollutants for Urban Wastewater Treatment Plants" (DB33/2169-2018), while other water pollutant control items comply with the Class A standard of the "Emission Standard of Pollutants for Urban Wastewater Treatment Plants" (GB18918-2002). 3. Solid Waste
The solid waste from this project mainly consists of esterified and oligomer slurries, PET melt and waste blocks, waste filter cartridges, waste oil agents, spinning waste and waste fibers, component cleaning and calcination slag, waste heat transfer fluid, waste packaging materials, sewage sludge, and domestic waste.
Esterified and oligomer slurries, waste oil agents, component cleaning and calcination slag, and waste heat transfer fluid are classified as hazardous solid waste and will be entrusted to qualified units for harmless disposal. General solid waste will be sold to relevant recycling units for comprehensive utilization, and domestic waste will be entrusted to the sanitation department for timely collection and disposal.
4. Noise
The noise pollution sources of the polyester and spinning units in this project are mainly the noise from the polyester workshop, spinning equipment, power station, air compressors, and other equipment. To ensure that noise levels meet standards, the following prevention and control measures are adopted:
① Strictly adhere to the "Design Code for Noise Control of Industrial Enterprises" during the design phase; during the equipment procurement stage, pay attention to selecting advanced low-noise power equipment to reduce the intensity of noise sources. ① For example, low-noise explosion-proof YB series motors should be selected for all pumps and motors;
② In the overall layout, the principle of "separating noisy and quiet areas" should be adopted for reasonable arrangement, and high-noise equipment should be placed on the north side of the plant area as much as possible, away from residential areas on the south side;
③ Silencing and sound insulation measures should be taken for high-noise equipment. Existing heat medium boilers and integrated power stations should be enclosed by solid walls at the plant boundary; silencers should be installed on existing heat medium boiler fans; pumps, fans, and other equipment in the sewage treatment plant should be placed in soundproof rooms with good sound insulation. If outdoor installation is necessary, soundproof covers or silencers should be installed on the noisy equipment;
④ Regulate valves and variable frequency speed control motors should be selected reasonably to avoid high noise caused by excessive voltage drop;
⑤ Strengthen daily equipment maintenance to ensure good equipment operation and avoid high noise caused by abnormal equipment operation.
After taking the above measures, the noise at the plant boundary of this project can meet the Class 3 and Class 2 standards of the "Emission Standard for Industrial Enterprises Noise at Boundary" (GB12348-2008), and the impact on the surrounding acoustic environment is minimal. III. Potential Environmental Impacts of the Project
1) According to the prediction results, after the implementation of this project, the maximum hourly ground-level concentrations of acetaldehyde, non-methane hydrocarbons, and ethylene glycol at all points of interest and grid points will meet the standards after overlaying background levels. Specifically, the maximum ground-level concentrations of acetaldehyde will meet the standard at 77.85%, non-methane hydrocarbons at 4.21%, and ethylene glycol at 5.26%. After overlaying, the daily and annual average concentrations of PM10 at all points of interest and grid points will meet the standards, with no exceedances. The daily average PM10 concentration at the maximum ground-level concentration in the region will meet the standard at 0.33% and the annual average at 0.14%, indicating a relatively small overall impact.
2) High-concentration wastewater, such as EG/H2O separation tower drainage, is pretreated by an air stripping tower. Wastewater from the polyester unit's air stripping tower, filter cleaning, polyester workshop floor flushing, oil tank wastewater,
spinning component cleaning, spinning workshop floor flushing, post-spinning extension wastewater, spinning workshop air conditioning drainage, domestic sewage, initial rainwater, circulating water system drainage, and concentrated water from the demineralization station are all treated at the plant's wastewater treatment station to meet the direct discharge limits in Table 1 of the "Synthetic Resin Industry Pollutant Discharge Standard" (GB31572-2015) before being discharged into the municipal sewage network. Finally, it is treated at the Cixi Eastern Wastewater Treatment Plant before discharge. Chemical oxygen demand (COD), ammonia nitrogen, total nitrogen, and total phosphorus comply with Table 1 of the "Major Water Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (DB33/2169-2018), while other water pollutant control items comply with the Class A standard of the "Urban Wastewater Treatment Plant Pollutant Discharge Standard" (GB18918-2002). 3) The noise generated by this project contributes to the plant boundary in a manner that generally meets the Class 3 and Class 2 standards of the "Emission Standard for Industrial Enterprises Noise at Boundary" (GB12348-2008).
4) After harmless treatment and reasonable utilization, the solid waste from the project will meet relevant regulatory requirements and will not cause secondary pollution, resulting in minimal environmental impact.
5) Environmental Risk Assessment:
① The butanol, xylene, and butyl acetate involved in this project are flammable, explosive, or toxic and hazardous substances, posing certain potential dangers.
② The construction project carries certain potential accident risks. The construction unit must strengthen risk management in accordance with the relevant management requirements for major hazard sources and earnestly implement various risk prevention measures, minimizing the probability of risk occurrence through appropriate technical means. In the event of a risk accident, the emergency response plan should be activated immediately to evacuate personnel from the pollutant hazard area within a short period of time, effectively controlling the accident. Under the condition of strengthened risk management and ensuring the implementation of environmental risk prevention measures and emergency response plans, the project's site selection and construction are acceptable from an environmental risk perspective.
IV. Key Environmental Impact Conclusions of the Project:
The Ningbo Huaxing Technology Co., Ltd.'s 160,000-ton/year melt-spun differentiated polyester pre-oriented (POY) fine denier filament production line upgrade project is located in Haidianrong Village, Longshan Town, Ningbo City, Zhejiang Province. The project site selection complies with the Cixi City "Three Lines and One List" ecological environment zoning control plan requirements; the project complies with national and Zhejiang Province industrial policies, and the adopted processes and equipment meet clean production requirements; pollutant emissions meet pollutant emission standards and major pollutant emission total control indicators. Based on the predicted results, the environmental impact of this project basically meets the environmental quality requirements determined by the environmental functional zoning of the project location; from an environmental perspective, the implementation of this project at this site is feasible.
V. Methods and Time Limits for Public Access to the Simplified Environmental Impact Report
Within ten working days from the date of this announcement, the public may request a simplified version of the report directly from the environmental impact assessment (EIA) unit or the construction unit. If the public has any opinions on environmental protection aspects of the construction project, they may submit them to the local environmental protection authority, the construction unit, or the EIA report preparation unit within ten working days from the date of this announcement. Written opinions may also be copied to the environmental protection administrative department responsible for approving the construction project.
VI. Scope and Main Issues for Public Consultation
Public participation in this project's EIA will solicit opinions and suggestions from representatives of citizens, legal persons, or other organizations within the project's assessment scope. The main content of the public consultation includes major environmental issues of public concern, the potential impacts of the project construction on the surrounding environment, and other opinions or suggestions regarding the project's environmental protection work.
VII. Specific Forms for Soliciting Public Opinions
After the release of this EIA information, the public can submit opinions or suggestions to the construction unit and the EIA unit via telephone, email, or letter.
VIII. Public Comment Period
The public can submit their opinions from August 19, 2021 to September 1, 2021 (a period of 10 working days).
IX. Contact Information
Construction Unit: Ningbo Huaxing Technology Co., Ltd.
Contact Person: Chen Bisheng Contact Number: 15212048288
Environmental Impact Assessment Unit: Zhejiang Renxin Environmental Science Research Institute Co., Ltd.
Contact Person: Engineer Ding Contact Number: 0574-55000320
Announcement Issuing Unit: Ningbo Huaxing Technology Co., Ltd.
Announcement Date: August 19, 2021
2021-08-20
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