Metal ladder ring opening is a new type of filler. It is about half the diameter of the high, while a tapered flange, ring wall has opened windows, and a curved blade extending toward the ring center. Reduce the height and the special structure of cone-shaped flange, not only to improve the gas-liquid distribution of the filler layer, and increased gas-liquid contact is conducive to spread the liquid and membrane surface of the pool constantly updated, so that mass transfer have been strengthened, separated Efficiency is greatly improved.
     General Powell ladder ring packing ring packing than the flux can increase 10-20%, 30-40% lower pressure drop, separation efficiency, as the technology has improved to varying degrees. So far, the world has more than 1,000 in the absorption tower ladder ring packing, steam and distillation operations applications. Depending on the circumstances, may be able to step ring Raschig rings, Pall ring, blister board, floating valve plate and the sieve, to achieve efficient, high-yield and energy saving.