公开(公告)号：US3920774A

公开(公告)日：1975-11-18

申请号：US43231974

申请日：1974-01-10

Applicant: STANDARD HAVENS

Inventor： REIGEL STANLEY A ,  DOYLE CHARLES D

IPC: B01D51/10 ,  F28C3/08 ,  C10K1/06

CPC classification number: F28C3/08 ,  B01D51/10

Abstract: A cooling tower for reducing process gas temperature by vaporization of liquid water while maintaining a dry bottom operation. The gas discharge duct is located in the lower hopper of the tower and a preferred orientation of spray nozzles insures minimum condensation of the atomized water spray. The water supply is regulated by a cascade control system employing both proportional and derivative modes of control during steady state operation and only proportional control during start-up operation.