(19)

(11)

EP 0 393 115 A1

(12)

(43) Date of publication: 24.10.1990 Bulletin 1990/43 (21) Application number: 89900416.0 (22) Date of filing: 19.10.1988

(51) International Patent Classification (IPC):  C01B 5/ 00( . ) F28D 15/ 02( . ) (86) International application number: PCT/US1988/003636 (87) International publication number: WO 1990/004748 (03.05.1990 Gazette 1990/10)

(84) Designated Contracting States: DE FR GB IT NL (71) Applicant: ABB AIR PREHEATER, INC. Wellsville, NY 14895 (US)	(72) Inventors: CHEN, En-jian Guangzhou Inst.Energy Conversion P.O Box 1254 Guangzhou (CN) LIN, Zao-rong Guangzhou Inst.Energy Conversion P.O Box Box 1254 Guangzhou (CN) CHEN, Li-ying Guangzhou Inst. Energy Conversion P.O Box 1254 Guangzhou (CN) (74) Representative: Gross, Gernot K. Rechtsanwalt  Kleiberweg 5 D-6200 Wiesbaden D-6200 Wiesbaden (DE)