(19)

(11)

EP 0 640 003 A1

(12)

(43) Date of publication: 01.03.1995 Bulletin 1995/09 (21) Application number: 94912832.0 (22) Date of filing: 22.03.1994

(51) International Patent Classification (IPC):  F23C 99/ 00( . ) F23C 6/ 04( . ) F23C 9/ 00( . ) F23L 7/ 00( . ) B01D 53/ 56( . ) F23C 7/ 00( . ) F23D 14/ 00( . ) (86) International application number: PCT/US1994/003072 (87) International publication number: WO 1994/021357 (29.09.1994 Gazette 1994/22)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 22.03.1993 US 19930034327 (71) Applicant: HOLMAN BOILER WORKS, INC. Dallas, TX 75212 (US)	(72) Inventors: LANG, Jerry, M. Lindale, TX 75771 (US) SCOTT, David, W. Garland, TX 75042 (US) (74) Representative: Schwan, Gerhard, Dipl.-Ing.  Elfenstrasse 32 D-81739 München D-81739 München (DE)