The dust removal method of the bag filter is another important factor in selecting the filter structure type. Different bag filter types with different cleaning methods should use different structural filter materials due to different cleaning energy and deformation characteristics of the filter bag.
(1) The mechanical vibration type bag filter is a bag filter that uses a mechanical device (including manual, electromagnetic vibration, and pneumatic) to cause the filter bag to vibrate and dust. This type of dust collector is characterized by less kinetic energy applied to the dust layer and more times. Should choose to use chemical fiber satin or twill fabric, thickness 0.3 ~ 0.7mm, mass per unit area 300 ~ 350g/m. The filtration speed is 0.6-1.0m/min; for small units it can be increased to 1.0-1.5m/min.
(2) The sub-room counter-blowing bag type dust collector adopts a sub-compartment structure and uses a valve to switch from room to room to form a counter-blowing air in a reverse direction, so that the filter bag shrinks or swells and removes baghouse dust remover. It has two-state and three-state distinctions, cleaning times 3 to 5 times / h, cleaning power comes from the dust collector body pressure, only in the special site in the back with anti-blowing power; belong to the type of low kinetic energy cleaning.
(3) Vibrating back-flushing and bag-type dust collectors refer to bag dust collectors that have the dual action of vibration and reverse air flow. The vibration causes the dust cake to loosen, and the counter-air current causes the dust to separate. The two methods cooperate with each other to improve the cleaning effect, and is particularly suitable for fine-grained viscous dust. The principle of filter material selection for such dust collectors is generally the same as that of chamber-type back-flushing dust collectors, and satin (or twill) woven filter materials are mainly used.