BAG FILTER FOR AIR PURIFICATION OF IMPURITIES Russian patent published in 2000 - IPC

FIELD: purification of impure air picked off the wood-working machines, containing shavings, wood sawdust, and abrasive particles, prior to its recirculation to the shop, applicable in other branches of industry. SUBSTANCE: filter has at least two rows of parallel-installed modules with single-thickness walls, each row of modules is additionally furnished with a pressure recirculation air conduit and connected to it through a tee-piece, and the latter is connected to the inlet end of the scavenging air manifold and to the outlet pipe connection of the centrifugal fan installed near the front end of each row of modules; tube plates are installed in the upper part of the dust-collecting chambers, and filter bags are attached to them with the ends open upwards, valve boxes with their open part are located on the tube plates and furnished with inspection holes, and a sealed service chamber is installed on the valve boxes, the hoppers of each row of modules are furnished with a screw conveyer with a lock material unloader, and in the adjacent rows of modules the lock unloaders are staggered, the openings for inlet of impure air to the hoppers are furnished with vertical guide shields, and louver panels are installed in the upper part of the hoppers, between their lateral walls and guide shields. Besides, each valve box is furnished with a differential pressure pickup connected to the actuator of the shut-off valve of the scavenging air conduit, each filter bag is furnished with a frame. EFFECT: expanded functional abilities, reduced power consumption and expenditures connected with maintenance. 7 cl, 12 dwg, 1 tbl