John Zink, of Tulsa, OK, is one of the best (if not THE best) manufacturers of flares and incinerators in the world. Their site is
www.johnzinc.com
Also Sulzer, from Switzerland, is an excellent manufacturer of horizontal incinerators. Their site is www.sulzer.com
Let me know whether in those sites you've found out what you were serching.
Giovanni S. Crisi
Sao Paulo - Brazil