In accordance with the requirements of the "Environmental Protection Law of the People's Republic of China", the Environmental Impact Assessment Law of the People's Republic of China and the "Measures for Public Participation in Environmental Impact Assessment" (Ministry of Ecology and Environment Order No. 4), the environmental impact assessment information of the "(omitted) Joint (omitted) Annual Production of 40,000 tons of flame retardants, 51,000 tons of surfactants, 29,800 tons of additives and 9,600 tons of water-based resins and water-based curing agents construction project" is now publicized as follows:

1. Information related to project environmental impact assessment

1. Introduction to construction projects

(omitted) Joint (omitted) It is planned to invest 510 million yuan (omitted) to build a construction project with an annual output of 40,000 tons of flame retardants, 51,000 tons of surfactants, 29,800 tons of additives and 9,600 tons of water-based resins and water-based curing agents in the northwest of the intersection of Baocheng Road and Coal Chemical Avenue in the Baoshan Circular Economy Industry Cluster.

2. Main environmental impacts of the project and pollution prevention and control measures

(1) Exhaust gas

According to the classification of waste gas pollution characteristics, the waste gas generated by this project can be divided into dust-containing waste gas, organic waste gas, and acid-containing (HCL) waste gas. The dusty waste gas is mainly the dust generated during the unpacking and loading process of powdery materials and the dust generated during the packaging process of powdery products; organic waste gas includes VOCS-containing waste gas collected in the barreled organic chemical raw material feeding room, process organic waste gas generated by each production line, and VOCS-containing waste collected in the liquid product filling workshop. Organic waste gas generated by the three-effect evaporation of high-salt wastewater in gas and sewage treatment stations, VOCS-containing waste gas collected in the temporary storage room of hazardous waste, organic waste gas generated in the storage tank area, and waste gas containing VOCS and odor factors collected in the sewage treatment station; HCL-containing waste gas is mainly waste gas generated by the BDP acyl chlorination and esterification process.

After the dusty waste gas from each workshop of this project is collected, it will be treated with a set of bag dust collectors built outside each workshop (4 sets in total).

According to the design treatment plan for organic waste gas in the plant, all organic waste gases (high concentration and low concentration) in the whole plant are collected through pipelines and then treated with a set of 30,000m3/h RTO (regenerative incinerator) device before being discharged after meeting the standards.

The exhaust gas containing a large amount of HCL gas generated during the BDP acyl chlorination and esterification process is absorbed by three-stage falling film water to produce industrial hydrochloric acid. The exhaust gas is treated by alkali spray absorption.

The exhaust gas that meets the standard for dust-containing waste gas treatment and the exhaust gas that meets the standard for hydrogen chloride-containing waste gas treatment in this project are all led to the RTO exhaust pipe and discharged into the atmosphere. That is, the entire plant is equipped with a 25m high exhaust pipe.

The exhaust gas that meets the standard for dust-containing waste gas treatment and the exhaust gas that meets the standard for hydrogen chloride-containing waste gas treatment in this project are all led to the RTO exhaust pipe and discharged into the atmosphere. That is, the entire plant is equipped with a 25m high exhaust pipe.

The maximum emission concentration of particulate matter in the exhaust gas of the external membrane filter bag dust collector in the first workshop of this project is 5.6mg/m3, and the maximum emission rate is 0.031kg/h, which can meet the standard requirements of Table 5 (particulate matter ≤ 20mg/m3) of the "Synthetic Resin Industrial Pollutant Emission Standard" (GB31572-2015). The maximum emission concentration and rate of particulate matter in the exhaust gas of the external membrane filter bag dust collector in the second workshop, the third workshop, and the fourth workshop are 6.3mg/m3 (0.025kg/h), 5.9mg/m3 (0.0047kg/h), and 7.2mg/m3 respectively. (0.014kg/h), all of which can meet the secondary standard in Table 2 of the "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996) (particulate matter 120mg/m3, the allowable emission rate of the 25m high exhaust pipe is 14.45kg/h).

The hydrogen chloride-containing waste gas produced by the acyl chloride and esterification reaction units in the BDP production process of the fourth workshop is absorbed by the two-stage alkali spray tower. The hydrogen chloride emission concentration in the waste gas is 8.92mg/m3, and the emission rate is 0.0223kg/ h, can meet the secondary standards in Table 2 of the "Comprehensive Emission Standards for Air Pollutants" (GB16297-1996) (hydrogen chloride 100mg/m3, 25m high exhaust pipe allowable emission rate 0.915kg/h).

The pollutant concentration in the exhaust gas of the organic waste gas incineration device of this project is 16.23 mg/m3 of total non-alkanes, 0.4 mg/m3 of styrene, 2.14 mg/m3 of phenol, 0.6 mg/m3 of ethanoic acid ester, 0.26 mg/m3 of ethanoic acid ester, 0.11 mg/m3 of ethanoic acid ester, 1.69 mg/m3 of benzene, and epoxy. Chloro*ane 6.0mg/m3, particulate matter 3.5mg/m3, meet the standard requirements of Table 5 of the "Emission Standard of Pollutants for the Synthetic Resin Industry" (GB31572-2015); SO23mg/m3, NOX55mg/m3, meet the standard requirements of Table 6 of the "Emission Standard of Pollutants for the Synthetic Resin Industry" (GB31572-2015). The NH3 emission rate is 0.112k/h, which meets the limit requirements in Table 2 of GB14554-93 "Odor Pollutant Emission Standard" (when the exhaust pipe is 25m high, the emission rate is NH314kg/h). The hydrogen chloride emission rate and concentration meet the emission limit requirements of the second level standard in Table 2 of the "Comprehensive Emission Standard of Air Pollutants" (GB16297-1996).

(2) Wastewater

The wastewater generated by this project mainly includes production wastewater and drainage from public auxiliary facilities. The production wastewater mainly includes flame retardant product process wastewater, auxiliary product process wastewater, water-based resin and water-based curing agent product process wastewater, a small amount of process wastewater, workshop floor cleaning wastewater, product replacement equipment cleaning wastewater, waste gas pretreatment scrubber drainage, vacuum pump drainage; public auxiliary facility wastewater mainly includes concentrated brine discharged from pure water preparation facilities, circulating cooling system drainage; and domestic sewage.

After the flame retardant high-salt wastewater is treated with salt by the three-effect forced circulation evaporator, the sewage condensate and other wastewater enter the self-built 100m3/d sewage treatment station in the plant for treatment. The treatment process adopts the "Fenton oxidation + UASB + hydrolysis acidification + A/O + phosphorus removal filter (Biological Aerated Filter BAF)" combined process. The effluent water quality of the sewage treatment station meets the indirect discharge concentration limit of water pollutants in the "Indirect Discharge Standard of Water Pollutants in the Chemical Industry" (DB41/1135-2016), and also meets the design inlet water quality requirements of the "Synthetic Resin Industrial Pollutant Discharge Standard" (GB31572-2015) Table 2 (omitted) for the design of inlet water quality of the sewage treatment plant in Baoshan Industrial Cluster Area. The effluent from the sewage treatment station and the clean water in the factory (omitted) are the political sewage pipe network and (omitted) the sewage treatment plant in Baoshan Circular Economy Industrial Cluster Zone. After further treatment to meet the standards, it is discharged into the Si River, and then discharged into the Tang River through the Si River.

(3) Solid waste

The solid waste generated by this project mainly includes filter residue generated during the production process of each product, dust collected by the dust collector, residual salt generated by the three-effect evaporator of high-salt wastewater, waste packaging materials, sewage treatment station sludge and domestic garbage.

The amount of hazardous waste produced in the entire plant is 1795.342t/a, which is temporarily stored in the 459m2 hazardous waste temporary storage room in the plant and is entrusted to a qualified unit for processing. Generally, the amount of solid waste generated is 21.589t/a. Domestic waste is produced and cleaned by the environmental sanitation department on a daily basis; sludge and other domestic waste are sent to the garbage incineration plant for incineration and disposal.

(4) Noise

The high-noise equipment in this project mainly includes various types of pumps, fans, circulating water cooling towers, air compressors, etc. The sound source value of the equipment is between 75 and 95dB (A). Through noise reduction measures such as silencing and vibration reduction, the noise at the factory boundary is predicted to meet the Class 3 standard requirements of the "Environmental Noise Emission Standard for Industrial Enterprises at Factory Boundaries" (GB12348-2008).

3. Conclusion of environmental impact assessment