1. With the development of bag filter technology and the increasing progress of environmental protection requirements, the application range of bag filter is more and more extensive. In terms of the current bag filter technology, it has solved the problems of high humidity, adhesion, low temperature, turbid smoke, explosion, and even can widely filter the air with fine dust.
2. The cohesive dust is easy to gather and accumulate on the surface of the filter bag. The bag filter can deal with the cohesive dust in time through the adsorption principle, so the waste can be treated in time. It is suggested that you can mix appropriate amount of powder with porous gap in the system pipe, and use the appropriate powder to absorb the cohesive dust, so as to achieve obvious observability effect. Then the bag filter is used for purification. For example, the refractory plant uses dolomite powder to absorb and purify asphalt smoke, aluminum plant uses alumina to absorb asphalt and hydrogen oxide, road company asphalt concrete workshop uses limestone powder to absorb asphalt smoke, and the adsorption efficiency can reach 90-98%. The above is the example of how to control cohesive dust explained by oasis company.
3. The main corrosive media of bag filter are gas and dust, such as sulfuric acid gas formed by sulfur molecule in coal and heavy oil fuel, or dust of various salts when meeting water. Since the corrosion phenomenon in flue gas purification occurs when the flue gas temperature is below the acid dew point, it is necessary to ensure that the system flue gas operates above the dew point temperature. Therefore, oasis company suggests that the important parts of bag filter should be made of stainless steel or coated with anti-corrosion coating. It can prolong the service life greatly.
4. The flue gas from submerged arc furnace, ferrosilicon furnace, calcium carbide furnace, ferroalloy furnace, boiler and dryer are all high-temperature flue gas. The bag filter can handle the flue gas with temperature below 290 ℃. If the temperature exceeds 300 ℃, oasis recommends high-voltage electrostatic precipitator equipment. If the temperature is higher than 300 ℃, it is recommended to install electrostatic precipitator for high temperature Smoke control. It is more and more common to use bag filter to treat flue gas from steam boiler, cement kiln, metallurgical furnace, incinerator and other high-temperature kilns at home and abroad.
5. In the treatment of grinding pecking dust, such as alumina, silica, sinter, etc., the coarse particles in the dust and the velocity of airflow in the bag filter are too high, resulting in strong wear on the filter bag and shell of the dust remover. Therefore, the corresponding measures should be taken to reduce the absolute quantity of coarse particle dust in the flue gas and reduce the velocity of dust containing gas For example, the pre dust removal device is set before the flue gas enters the bag filter, the flow rate at the inlet of the filter bag is strictly controlled, and wear-resistant materials are added at the grindable part of the airflow inlet.
