Electric furnace dust collector

Electric furnace dust collectors are highly favored by users due to their small footprint, large air processing capacity, and purification capabilities. This equipment has been widely used in industries such as electric furnace steelmaking, blast furnace coal injection, sintering, carbon black, cement, etc., and has achieved good results. Compared with anti blowing bag filters under the same processing air volume, it has significantly reduced investment, operating power consumption, footprint, and equipment weight, making it an ideal dust removal equipment for steelmaking enterprises.

The components of the intermediate frequency furnace dust collector include the shell, filter bag, ash hopper, ash discharge device, bracket, and pulse cleaning system. When the dusty gas enters the dust collector through the air inlet, it will hit the inclined partition in the middle of the air inlet, and the airflow will turn and flow into the ash hopper. At the same time, the airflow speed will slow down. Due to the effect of gravity settling, the coarse particles of dust in the gas will directly fall into the ash hopper, playing a role in pre dust collection. The airflow entering the ash hopper then bends upwards and passes through the filter bag with a metal frame inside. The dust is captured on the outer surface of the filter bag, and the purified gas enters the clean room at the upper part of the filter bag chamber, where it is collected and discharged through the air outlet pipe.

Electric furnace dust collector converts iron furnace powder, dust collection hood extracts flue gas, main smoke pipeline, settling chamber, cold air, chimney exhaust, exhaust, induced draft fan, bag filter, intermediate frequency steelmaking flue gas purification system process overview: During the electric furnace smelting process, a large amount of smoke and dust will be emitted into the air, seriously polluting the environment and affecting the health of workers. From the design perspective of the electric furnace smelting process, the use of a low-level mobile dust collection hood with feeding equipment, steel equipment, and dust removal equipment can be used to treat the flue gas throughout the electric furnace smelting process. The electric furnace bag filter is a combination of a low-level mobile dust collection hood, feeding equipment, steel tapping equipment, and dust removal equipment for the flue gas capture system. The low-level mobile dust hood covers the entire operation platform and steel tapping pit, allowing the electric furnace smelting production process to be carried out entirely inside the low-level mobile dust hood, achieving the full process capture of flue gas. When adding materials, they are added through feeding equipment and filled up several times according to production needs, solving the problem of difficult smoke capture during vehicle feeding. During the steel tapping process, the electric furnace platform is flipped and directly discharged into the steel ladle on the tapping track flat car. The tapping process is completed inside the hood, which solves the problem of partial leakage of flue gas during tapping from the local dust collection hood.

The capture technology of electric furnace dust collector:

The semi closed cover consists of a fixed cover and a movable cover, and the movable cover can be moved to the top of the transformer room. In recent years, semi enclosed hoods have been widely used in small and medium-sized electric furnace dust removal systems. Compared with roof hoods, their advantages are mainly: smaller system exhaust volume, higher flue gas capture efficiency, and relatively lower investment and operating costs. A semi closed hood can capture the flue gas during electric furnace smelting, but its efficiency in capturing the flue gas generated during feeding and steelmaking is not high. The switch of the semi closed hood has an impact on the smelting cycle.

The electric furnace dust collector can eliminate the flue gas generated during various smelting processes, which is conducive to meeting environmental protection requirements and is easy to operate. When adding materials, the feeding device is used for feeding, and the material can be filled up by repeating several times, solving the problem of difficult smoke capture during feeding. During steel tapping, the energy-saving electric furnace platform flips directly into the ladle on the tapping flat car, and the tapping process is completed inside the hood, achieving the full process capture of flue gas. At present, the main form of flue gas capture for energy-saving electric furnaces in China is the umbrella shaped rotating cover. The umbrella shaped rotating cover is assumed to be located above the furnace mouth and rotates back and forth along the centerline of two energy-saving electric furnaces. When adding materials, the rotating cover is moved away and the material is directly added through the crane; During steelmaking, the energy-saving electric furnace platform is flipped forward, and the furnace mouth is located outside the umbrella shaped cover. In both cases, the umbrella shaped cover is in a displaced state and cannot extract the smoke, causing the smoke to directly rush towards the roof. Due to frequent feeding, the working time of the umbrella shaped cover is very short, and the capture rate is about 50%. In the current market, some manufacturers are considering using secondary dust removal on the roof to solve the problem of residual smoke emitted in the workshop due to the failure of umbrella shaped covers to capture it. Secondary dust removal is to install several suction hoods on the roof of the factory building, and extract residual smoke through independent dust collectors. In actual use, the following problems are prone to occur: high system air volume requirements, large equipment investment, slow wind speed at the mouth of the suction hood, unclear smoke removal effect, especially in winter when the atmospheric pressure is low, the residual smoke emitted accumulates at the bottom of the workshop and cannot reach the roof, and the suction hood on the roof is virtually useless.