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Melting processes lead to generation of air pollution at the following stages
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Initial heating and melting generates fumes
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Drossing with sulphur, wooden powder and coke breeze generates lot of smoke and dust particles
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Further heating for Refining and Alloying with different chemicals generates fumes and dust particles.
Hence, to meet various goals of maintaining employees' health, factory environments as well as regulatory requirements, it becomes imperative to get high end Air Pollution Control Systems to be installed with the Melting Pots. Characteristics of Air Pollution generated in Melting Pot
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Dust
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500-600 mg/Nm3
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Temperature
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60-80C
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Gases
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Fumes and Dust
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Discharge Characteristics required as per Norms
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Dust
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Less than 50 mg/Nm3
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Lead ( Pb)
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Less than 10 mg/Nm3
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Temperature
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50-60 C
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Gases
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Not Detectable
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Selection of Technology for Air Pollution Control Based on the Parameters and the Standards mentioned, the following technology is adopted for Air Pollution Control System in Melting Pot: Details of Air Pollution Control Device with functions Suction Hood Aerodynamically designed suction hoods are provided to capture flue gases generated at source itself. Duct & Bends Ducts and bends are required to convey flue gases from point of suction to final top of the chimney and connect various equipments like suction hood, bag house, ID fan and chimney. All bends and reducers are aerodynamically designed and have provision of manhole cleaning mechanism. Bag Filtration System: It is used for final filtration of flue gases to remove fine dust particulate matter using Pulse Jet Technology. Treated gases from all the bags are collected at top of bag house and passed through ID Fan to exhaust the same to chimney. The dust is collected at bottom of hopper and is discharged through Rotary Air Lock Valve. Bag Filtration System It is used for final filtration of flue gases to remove fine dust particulate matter using Pulse Jet Technology. Treated gases from all the bags are collected at top of bag house and passed through the ID Fan to exhaust the same through chimney. The dust is collected at bottom of hopper and is discharged through Rotary Air Lock Valve. ID Fan ID Fan provides necessary driving force to convey flue gases from top of furnace to top of the chimney. The volume sucked overcome the total resistance offered by equipment and duct with the help of fluid horse power provided by ID Fan driven by suitable motor. Stack (Chimney) The generated gases are passed to atmosphere after treatment through chimney of suitable height and diameter.
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