Synthetic gas radiant cooler with internal quenching and purging facilities

A radiant syngas cooler for treating a stream of hot, particulate-containing synthesis gas effluent, which cooler comprises

• an elongated upright shell (11),
• a water bath (12) at the shell lower end,
• a first dip tube (27) depending from said shell and defining a disengagement zone at the shell lower end above said water bath,
• a water wall (13) extending internally of said shell forming an internal chamber (14) and being spaced from the inner wall of said shell to define an elongated annulus (17) therebetween,
• inlet means in said shell communicated with said internal chamber (14) to conduct said stream of hot particulate-containing syngas thereto,
• a second dip tube (19) depending from said water wall (13), spaced inwardly of said first dip tube (27) to define a constricted annulus (31) therebetween which terminates in said water bath(12),
• flow control means for communicating said annulus (17) with a pressurized source of a purge gas,
• whereby said purge gas and said particulate-carrying synthesis gas will enter said bath concurrently, and
• at least one gas discharge port communicated with said disengagement zone to conduct cooled gas therefrom.