JOSEPH B ADAMS
Engineers in Ironton, PA
License number
Pennsylvania PE035998E
Category
Engineers
Type
Professional Engineer
Address
Address
Ironton, PA 18037
Professional information
Control Of Nitric Acid Plant Stack Opacity During Start-Up And Shutdown
US Patent:
4869890, Sep 26, 1989
Filed:
Apr 5, 1988
Appl. No.:
7/177713
Inventors:
Joseph B. Adams - Coplay PA
James A. Gaspar - Houston TX
Paul J. Stash - Houston TX
James A. Gaspar - Houston TX
Paul J. Stash - Houston TX
Assignee:
Air Products and Chemicals, Inc. - Allentown PA
International Classification:
C01B 2140
US Classification:
423392
Abstract:
The present invention is a process for the control of nitric acid plant stack opacity in the range from 0 to 10 percent during plant startup and shutdown. The process is a series of sequential steps which encompass maximizing pressure, water and air flow to the absorber and adding ammonia upstream of the catalytic combustor. The process is typically accomplished through an automatic control system.