| 摘要 |
The present invention relates to an apparatus for mixing and introducing gas into a body of liquid comprising: a main shaft having a substantially vertical longitudinal axis, said shaft mounted to said frame and extending downward into said body of liquid; a drive assembly mounted to said frame and coupled to said shaft for rotating said shaft about said axis at a rate of rotation; and a plurality of elongated spaced-apart radially-extending discharge members mounted to said shaft at a depth below a surface of said body of liquid, wherein said plurality of discharge members are rotatable about said axis of said shaft, wherein each of said discharge members has a generally planer, upwardly facing discharge surface that has a leading and a trailing edge and a closed lower portion, wherein each discharge member has a first interior passageway in communication with a source of gas under pressure, wherein each discharge surface has perforations that communicate with said first interior passageway, wherein each discharge surface is inclined at an angle with said leading edge lower than said trailing edge, wherein said angle combined with said rate of rotation causes an angle of attack of said liquid relative to said discharge surfaces to be generally zero or somewhat greater, and wherein said rotation of said discharge members causes said liquid flowing across said discharge surfaces to shear said gas flowing out of said perforations to form bubbles of said gas, characterised in that the apparatus further comprises: an admixture source; and a second interior passageway within said discharge members in communication with said admixture source, wherein said discharge members include a plurality of admixture outlets in communication with said second interior passageway for releasing said admixture into said liquid body as said discharge members rotate. <IMAGE> |
