High capacity dry separation apparatus with air-heavy medium fluidized bed

A high capacity dry separation apparatus with air-heavy medium fluidized bed, the apparatus comprising a separation chamber (3) with fluidized bed, an air distributor (4), an air chamber (5), a pipeline (6), a scraper conveyer (2) in the separation chamber (3), a sink discharge outlet (8) at one lateral side of the separation chamber (3), a dedusting outlet (9) at the top of the separation chamber (3), an up-floating materials discharge outlet (11) and a feed inlet (12), wherein:

• (a):
• the feed inlet (12) and the up-floating materials outlet (11) are arranged on two opposite sides of the separation chamber (3) while a discharge wheel (10) is provided at the up-floating materials discharge outlet (11) in the separation chamber (3);
• (b):
• the scraper conveyer (2) comprises two parallel columns of scrapers moving side by side;
• each column of scrapers comprises a series of sets of lapped chain boards (18) and scrapers (20) fastened together with bolts (19);
• each scraper (20) is formed with a series of holes (22) therein having diameters of 6 mm to 13 mm and arranged equidistantly and in a staggered manner relative to one another;
• the upper part of the scraper conveyer (2) is exposed above the fluidized bed (1) in the separation chamber (3) and the lower part is immersed at its bottom;
• the scraper conveyer (2) moves in a direction perpendicular to the moving direction of the up-floating materials;
• (c):
• at one lateral side of the separation chamber (3), an inner circulator (7) for heavy medium is provided with a certain inclination, the inner circulator comprises an air inlet tube (13), a cone-shaped buffer chamber (14), a sieve layer (15), a multilayer fabric (16) and a sintered metal plate (17).