| 摘要 |
<p>The invention relates to a circulation gas-liquid mixer with a rotor (6) which is submerged in the liquid, has vanes on both sides, draws in gas on its upper side via a plunge pipe (5), draws in liquid at its underside, and disperses both media at the rotor outlet. The rotor, in the manner of a double-entry, radially traversed pump or blower rotor, has a closed wheel disc body (19), which carries vanes (20, 21) on both sides and has a diameter (dr) which is greater than the internal diameter (di) of the plunge pipe. The plunge pipe (5) is surrounded, in the vicinity of the rotor, by a screen (26) which runs perpendicular to the axis and whose external diameter (DS) is substantially greater than the external diameter of the rotor (da). On the inside, the screen (26) extends continuously, both axially and radially, as far as the top side rotor vanes (20) without touching them. This construction permits low-energy gas introduction. The gas passes into the liquid with a high velocity through a narrow slit at the circumference of the wheel disc body, thus producing fine gas bubbles. The screen causes strong turbulence of the dispersion and prevents said gas bubbles from coalescing and rising, as a result of which bubble dispersion over a large volume is achieved. <IMAGE></p> |
