The content of the second information announcement of our company's new materials and cemented carbide technical transformation projects
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Constructor: Jinan Institute Of Metallurgical Science Co,ltd. Project Name: New Materials and Carbide Technology Transformation Project
Jinan Institute Of Metallurgical Science Co,ltd. New Materials and Cemented Carbide
The content of the second information announcement of the technical renovation project
I. Name and summary of the construction project
Constructor: Jinan Institute Of Metallurgical Science Co,ltd.
Project Name: New Materials and Carbide Technology Transformation Project
Construction Nature: Technical Improvement
Construction address: No. 18111, Jingshi East Road, Jinan City
Project Overview: The existing project is a new material and cemented carbide project, covering an area of 47583m2, with an annual output of 1000 tons of cemented carbide. The construction content includes main works, public works and environmental protection works . The technical renovation project is in the existing workshop, and no new land is used; the technical renovation includes the elimination of old equipment and processes (liquid ammonia hydrogen production process and equipment), the original coal-fired boilers are changed to 2 gas-fired boilers, and 12 new ones are added. Production equipment (5 sets of polyurethane mold equipment, 3 sets of grinding machine equipment, 1 set of cutting machine, 3 sets of spray dryer), and some equipment are updated and upgraded. The production scale remains unchanged after the technical transformation.
II. The possible environmental impact of the construction project and environmental protection measures
(1) Exhaust —Organized Exhaust
The organized waste gas of the project after technical transformation includes: ingredient waste gas (G2-1), alcohol waste gas (G2-2), sintering waste gas (G2-3), surface treatment dust (G2- 4), gas boiler flue gas (G2-5).
① Batching waste gas (G2-1): The batching process of tungsten carbide, cobalt powder and other powders of the project adopts the form of manual weighing, and the feeding process is all airtight, negative pressure feeding, basically No dust is generated. The total consumption of powder materials in the project is about 404t/a. Referring to the "Manual of Pollution Coefficient of Industrial Pollution Source Production for the First National Pollution Source Census" (revised in 2010), the pollution production coefficient of powder batching and other processes is 0.8kg/t raw material, then the project The production of batching dust is about 0.32t/a (0.26kg/h, annual work is 300 days, 2 hours per day). The batching equipment is sealed as a whole, collected by negative pressure, and the collection efficiency is not less than 95%. The waste gas is treated by a bag filter. The dust removal efficiency is 95%, and the emission is 0.016 t/a (0.013kg/h, 300 days of work per year, 2 hours a day) through a 15-meter-high exhaust pipe.
①Alcohol waste gas (G2-2): The volatilization of alcohol gas mainly comes from wet grinding and filtration. The alcohol recovery system built in the equipment is used. The recovery rate of alcohol is 99%. 15m high exhaust pipe discharge, the discharge is about 0.09 t/a.
②Sintering waste gas (G2-3): The waste gas in the vacuum sintering process consists of two parts, one part is the protective gas, and the other part is a small amount of volatile waste gas generated by the failure to collect all paraffin wax. In the process of degreasing in the vacuum furnace, the recovery rate of paraffin wax is 99%, and the remaining 1% is discharged into the air. Its main components are organic molecules and non-methane total hydrocarbons. is 0.1 t/a.
③Surface treatment dust (G2-4): The dust mainly comes from various production equipment in the mold workshop, extrusion workshop, deep processing workshop and sintering workshop, mainly including trimmers, pellets Bar machines, lathes, cutting machines, bench drilling and milling machines, sharpening machines, chamfering machines, and double-gun drum sandblasting machines are all equipped with dust collectors. The number of dust collectors is 50, and the average daily After running for 4 hours, the collection efficiency is 100%. The dust is discharged through the 15m high exhaust pipe after being dedusted by the built-in dust collector. The annual dust emission is about 0.08 t/a.
④ Gas-fired boiler waste gas (G2-5): The technical transformation project is to replace the existing one coal-fired boiler with two natural gas boilers, and the transformation has been completed. Natural gas is a clean energy source, and combustion produces less pollutants, and generally does not require treatment. After being diluted by the external ambient air, the impact on the regional ambient air quality is small. After the technical transformation, the natural gas is used as the fuel for the environmental protection boiler, the natural gas consumption is 300,000 m3/year, the boiler adopts the low nitrogen burner, and the boiler exhaust gas is discharged up to the standard through the 15m high exhaust pipe.
According to the company's 2018 routine monitoring report, the monitoring date was September 30, 2018, and the SO2, NOx, and smoke emission concentrations of natural gas boilers were divided into 20.8mg/m3 and 32.5mg/m3 , 2.9mg/m3, and the discharge rates were 0.00815kg/h, 0.01274kg/h, and 0.00114kg/h, respectively.
It can be seen from the data that the emission concentrations of soot, sulfur dioxide and nitrogen oxides in the exhaust gas of the gas boiler after the technical transformation all meet the "Shandong Province Boiler Air Pollutant Emission Standard" (DB37/2374-2018) The standard requirements of key control areas are SO2 50mg/m3, NOx 100mg/m3, particulate matter 10 mg/m3”.
(2) Exhaust gas——unorganized exhaust gas
①Exhaust gas from batching workshop (G’2-1)
There is feeding dust in the batching process. The batching equipment is integrally sealed and collected by negative pressure. The collection efficiency is not less than 95%, and 5% is dissipated, and the dissipated amount is 0.016t/a (0.013kg/h, working 300 days a year, 2h a day).
②Ball Milling Workshop Exhaust Gas (G’2-2)
The ball milling process of the project is mainly the waste gas of ethanol volatilization, and the dust is basically not dissipated. According to the experience data provided by the company, the volatilization of ethanol in the ball milling process is estimated at 0.1%, and the annual consumption of ethanol in the project is 10t/a, then the ethanol (non-methane total hydrocarbons) produced in the ball milling process is about 0.01t/a ( 0.008kg/h, working 300 days a year, 4h a day).
There is no new domestic sewage of workers and new workshop washing wastewater in this project. Boiler sewage relies on the original boiler sewage system, and the water discharge does not increase, which is 100m³/a. The soft water system relies on the original soft water system, and its water consumption does not increase, so the drainage does not increase, which is 20m³/a. The total sewage discharge is 6120 m³/a (the sewage discharge and the sewage discharge before the technical upgrading have not increased).
Sewage treatment relies on the existing sewage treatment station in the factory area and is used for greening and watering of the factory area, and no waste water is discharged.
The main sources of noise pollution in the production process are boilers, grinders, cutting machines, vibrating screens, etc.
(4) Solid waste
This project is a technical renovation project and no new solid waste is generated. Because of the elimination of outdated processes, waste catalysts and coal-fired boiler ash are no longer produced in the plant. The solid wastes produced by the whole plant after the technical transformation are mainly production waste, domestic waste, sludge, waste ion exchange resin and waste lubricating oil.
III. Environmental Impact Assessment Conclusions in the Environmental Impact Report
The project conforms to the national industrial policy and is an encouraged project with good social and economic benefits; it conforms to the local development plan; the site selection is feasible; At an advanced level; overall, the pollution degree is relatively light, and the pollutant discharge is less. The project's "three wastes" pollutants can be discharged up to the standard. Under the condition of strictly implementing various pollution prevention measures and risk prevention measures proposed in the report, from the perspective of environmental protection, the project construction is feasible.
IV. Name and contact information of construction unit
Constructor: Jinan Institute Of Metallurgical Science Co,ltd.
Contact: Manager Sun
V. Name of the environmental impact assessment agency undertaking the assessment work
Environmental Assessment Unit: Shandong Daiquan Environmental Protection Technology Co., Ltd.
VI. Public Comments
Public Comment Form for Environmental Impact Assessment of Construction Projects. Download address https://pan.baidu.com/s/1OI-ynCDCqvIRWm_5y7024w Extraction code: ttds
7. Ways and channels for public comments
This announcement starts from the date of publication to the beginning of the third information announcement. The public can express their opinions on the project and the EIA work by filling in the public opinion form and sending emails to the designated mailbox for public notice within this time limit.
Jinan Institute Of Metallurgical Science Co,ltd.
June 15, 2020
Tel : +86-0531-58672336
Fax : +86-0531-58679328
Email : email@example.com
Address: No. 18111, Jingshi East Road, Zhangqiu City, Shandong Province
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