Cement, Energy and Environment

with 20 vertical AISI 304 L wires with an anti-cutting bottom. In order to hold the bags and mm1m1ze filtering media abrasion/wearing due to dynamic stress during the process, the bag cages' installation/extraction is manual and does not require any special tools. ~ Figure 2. View of stack and preheater tower. The filters will work with a bag cleaning system in online mode without exclusion of any compartment. An electronic sequencer for automatic control of the cleaning compress air electrovalves is provided with adjustable jet impulse to regulate cleaning time and interval time. ESP technology by means of a new bag filter. By exploiting the existing external structural work and only replacing the inside technology, it was possible to achieve high technical performances while controlling costs. Hascon constructed a new plenum filter, which was welded to the existing ESP above the bag plate . The plate was manufactured in Corten and is equipped with a walking-type roof, with wide access doors for manual extraction of bags from the top. The filter was completed with electro-pneumatic poppet valves installed on the outlet collector, subdividing the filter into three filtering sections. This allows the exclusion of one compartment at a time for easier maintenance during operation. To accommodate the high temperature of the fumes, Hascon selected a fibreglass material with PTFE microporose membrane (770 gr/m 2 weight), which can withstand a continuous operating temperature of 260' C. The bags have been manufactured with a reinforced bottom and a snap– ring fixing system on the top. The company also provided a set of bag cages manufactured ·- Table-3 Bag filter technical data Type AJ-S-05-M-12x16-6, 5-3135 j Quantity 1 Effective flow rate after fresh air damper 183000Am% j system Operating temperature 220'C Installation Indoor Overall pressure drop during 80 ..;-.200 mbar Operation Total filtering surface 3135 m 2 Filtering surface with one compartment 2508 m 2 in maintenance Filtering surface per compartment 627m 2 I Number of compartments 5 Bags total quantity and dimension 960 bags ! 160 mm dia. X 6500 mm ....__. Bag quantity per compartment 192 Filtering velocity 0.97m/min Filtering velocity with one compartment 1.22 m/min in maintenance Bag filtering media Fibreglass with PTFE =:J Membrane 750 g/m 2 Dry and without oil compressed air 200-220Nm% consumption Compressed air pressure 5..;-7 bar l Electrovalves quantity (2 in.dia) 60 ~ Dust outlet concentration s_10mg/m 3 Bag filter dimensions (length x width x 13800 x 5500x13000 mm height) --, Hopper clearance 1500mm - - 34