Metas dust collector bag in normal flue gas temperature conditions, bag type dust collector for dust filter bag temperature requirements below 150℃, and in the flue gas temperature is higher occasions. Because these dust containing smoke and gas dust is not suitable for the collection of electric dust collector due to the specific resistance limit, it can only be collected by cloth bags or other ways; If it is necessary to reduce the temperature containing dust to below 150℃, the investment is higher or subject to the restrictions of the site site; Because the dust gas contains sulfur components, dust gas has acid “dew point”, can only be above the acid dew point that is, the temperature is high in the state of filtration and separation and other factors, so you need to have a kind of resistance to high temperature chemical fiber used to make filter materials, metas needled felt filter bag is suitable for these occasions.