| 摘要 |
A prebox receptacle is mounted in a pan of a distributor which distributes liquid onto a bed of packing media in a gas-liquid contact column. The pan has a substantially horizontal deck surrounded by sidewalls, and outlet openings are formed in the deck to discharge liquid from the deck onto packing media therebelow. The prebox receptacle is mounted on and supported by the pan. The prebox has a bottom wall with a liquid-receiving upper surface, and openings which feed liquid into a deceleration space located between the bottom wall of the prebox and the deck of the pan. The openings in the prebox bottom wall are horizontally displaced from the outlet openings of the deck. The boundary of the deceleration space lies between the inlet openings and the outlet openings, and the vertical area of this boundary is substantially greater than the total area of all inlet openings which feed the deceleration space, so that liquid flowing through the boundary to the outlet openings has a substantially lower velocity than liquid flowing through the inlet openings into the deceleration space. Mixing vane units are mounted in spaces between the pans to produce eddys in the ascending vapors. At least some pans have outlet openings which lead to extension troughs which themselves have liquid outlets located in areas which are not served by any outlet openings of the pans.
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