Steel plants should choose what kind of material of dust filter bag? Dust filter bag selection method

With different materials, different production methods of dust filter bag have different applicable conditions. Therefore, adopt what kind of filter bag should be according to the using conditions of different users to choose carefully.

choose dust filter bag conditions to consider mainly has the following kinds.

filter processing by the characteristics of dust and gas

a. Temperature: because with dust filter bag is made of different materials can withstand temperature is different for a long time continuously, if using a temperature higher than the dust filter bag can afford, filter material will soon be damaged.

b。 Humidity, moisture content in the gas to the dew point. Moisture content is high, the dew point is high, easy to condensation inside the bag filter, so that the dust is easy to teach the knots on the filter bag and influence soot cleaning effect. Sometimes if filter often run up and down, the dew point temperature is higher than the dew point, sometimes is lower than the dew point, filter material would be brittle and easy to damage. If there is another important problem, is the bag filter in is under the condition of high temperature and contains quite a lot of water, some of the filter material will soon damaged by hydrolysis.

c。 Flammability and organ fry: if the dust in the air containing combustible gas such as hydrogen, carbon monoxide, methane and acetylene or grains, aluminum dust reaches a certain concentration range, meet fire can produce severe explosion. In this case it should be chosen of flame retardant, can eliminate electrostatic filter material.

d。 Chemical composition: if used in removing dust filter bag handle dust gas containing acid, alkali or organic solvent, should choose can respectively the material corrosion resistance of filter material. If the handle is hot gas and dust can contain a certain amount of oxygen or oxidation, some filter material is easy to damage. Gas sealed sulfur, can make the dew point greatly improve

the ideal filter material should be dust catching ability, large amount of dust, permeability is good, easy to clear ash, dimension stability, can work under various adverse conditions, long service life. Cost is not high. But unfortunately, there is no can fully meet the requirements of filter material, therefore, in the design and selection of bag filter, a very important content is to choose an appropriate filter material. If improper selection filter material, the effect may not be ideal when using; Or it is easy to damage and should be changed frequently, so as to greatly increase the operation cost of the filter.