The Function of Bag Filter in Electric Furnace Steelmaking

The components of electric furnace flue gas mainly include nitrogen, carbon dioxide, carbon monoxide, oxygen, and there are also very small amounts of nitrogen oxides and sulfur oxides. Among them, nitrogen oxides are generated by heating nitrogen and oxygen in the high-temperature arc of the furnace, while sulfur oxides are generated by some electric furnaces using heavy oil to support combustion. The temperature of the flue gas is very high, usually around 30 tons of electric furnaces, with a flue gas temperature of 1200-1400 degrees Celsius at the furnace mouth. If it is an ultra high power electric furnace, the flue gas temperature can reach 1600 degrees Celsius. The particle size of dust inside an electric furnace is generally between 0.1 and 100 μ m. These dust mainly include water, volatile matter, calcium oxide, magnesium oxide, iron oxide, iron oxide, aluminum oxide, tin oxide, etc. The characteristics of electric furnace flue gas are small particle size, high dust concentration, large flue gas volume, and high temperature. The flue gas contains combustible gases and water vapor, and the dust has high iron content, which has recycling value. Box furnace. One ton of dust can produce 12-18 kilograms of dust, and the gas contains harmful substances such as dioxins, which seriously pollute the environment. When choosing a dust collector for this situation, it is generally necessary to first understand the main components and properties of this type of gas in order to choose a suitable dust collector.
Electrostatic precipitators may exhibit excessive resistance due to excessively high furnace gas temperature, which seriously affects purification efficiency. Wet dust collectors, on the other hand, should have the presence of sulfides and nitrides, which can easily produce sulfuric acid and nitric acid, resulting in serious corrosion effects on the equipment. Bag type dust collectors can capture various types of inductive dust, especially high specific resistance dust. The efficiency of using bag type dust collectors is much higher than that of electric dust collectors, and the operation is very simple without generating problems such as sludge and corrosion.
Add an activated carbon filter layer to reduce the concentration of PCDDs. When designing a dust removal system and selecting a dust collector, factors such as temperature and gas properties should be considered. The most suitable one is the bag type dust collector. The bag type dust collector is currently a more suitable choice, and the bag type dust collector has a certain advantage in purifying flue gas. The tubular furnace bag type dust collector can achieve a high purification efficiency of 99% for purifying dust in the micron and submicron scale, A very precise bag filter with an ash removal efficiency of even 99.99%.

The above content is organized by Superb heater Company, super heater. Mainly professional production: industrial heating elements, temperature measuring elements, production equipment, accessories, and raw materials such as tubular heaters, tubular heaters, belt heaters, ceramic heaters, silicone rubber heaters, thermocouples, etc.

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