To control air pollution emanating from EAF furnaces, use an appropriate air pollution control system which includes devices such as scrubbers, baghouses, or electrostatic precipitators, cyclones, high efficiency blowers to capture and remove pollutants from the furnace exhaust. The use of most appropriate filter media can help reduce the amount of dust and particulate matter in the exhaust.
Description
To control air pollution emanating from EAF furnaces, use an appropriate air pollution control system which includes devices such as scrubbers, baghouses, or electrostatic precipitators, cyclones, high efficiency blowers to capture and remove pollutants from the furnace exhaust. The use of most appropriate filter media can help reduce the amount of dust and particulate matter in the exhaust.
Fair Engineering Co. (FEC’s) designed FES system which is useful to capture high temperature fumes emanating from EAF are sucked from the water-cooled elbow provided on its 4th hole. Water-cooled ducting is provided to convey the fumes. A suitable water-cooled moving sleeve or alternatively a fixed water-cooled duct with a fixed specified gap between elbow flange and duct can be made to facilitate the EAF roof movements. The water-cooled ducting can be of double walled or tubular. The tubular ducting will have longer life as proper water conveying velocities can be maintained as there will be no short circuiting of water unlike in the double walled water-cooled ducts. It is necessary to have treated cooling water circulation in water-cooled circuit. The water must be treated for TSS, TDS and hardness etc.
During extracting the fumes, it contains very high temperature which needs to be cooled down. The dust concentration in the fume is in the order of 2 to 3g/Nm3. The initial fumes coming out from the AOD will be cooled down by water cooled ducting, later it will be cooled down by Forced Draft Cooler (FDC) to suit the temperature for filter bags and protect them from burning. Once the desired temperature reduction is achieved, the fumes will be directed towards bag filter and then fumes will get filtered up to concentration level of less than 50mg/Nm3.
Finally, proper maintenance of the air pollution control system is essential for ensuring the system is working properly and providing adequate air pollution control. This includes regular cleaning of the system components, regular testing, and replacement of worn parts, as well as scheduled maintenance of all components.
In conclusion, air pollution control from EAF furnaces is an important process that requires careful attention, as many of the pollutants released by these furnaces are hazardous to human health. By ensuring the FES system is properly maintained and by upgrading system spare parts after service life, can help reduce the amount of air pollution produced by EAF furnace.
