Title:
METHOD AND A PLANT FOR THERMALLY DRYING WET-GROUND RAW MEAL
Document Type and Number:
WIPO Patent Application WO2004103927
Kind Code:
A3
Abstract:
The aim of said invention is to reduce equipment for dehydrating and drying sludge for producing cement clinker from wet-ground cement raw meal in the form of sludge, in particular during transformation of existent sludge dewatering equipment into sludge drying equipment and, first of all during thermal drying sludge in order to maintain the heat loss associated with the formation of exhaust vapours as low as possible. For this purpose, raw meal sludge is dried in a vapour flow dryer (15) by circulating exhaust vapour which, prior to introduction thereof into the low part of the dryer (15), is heated by indirect heat transmission from gaseous flows of a pre-heating system by suspending in a gas cyclone of a clinker production line. A partial vapour flow (25) corresponding to water evaporated during raw meal sludge drying is removed from the steam circuit and extracted in the form of a condensate (28) after increasing the vapour temperature by a vapour condenser (26) and the passage of vapour arranged in the dryer (15) through the heating surface (27) of the vapour condenser.
Inventors:
JOCHEM MATTHIAS (DE)
KUEHNE KLAUS (DE)
KUEHNE KLAUS (DE)
Application Number:
PCT/EP2004/005116
Publication Date:
January 27, 2005
Filing Date:
May 13, 2004
Export Citation:
Assignee:
KLOECKNER HUMBOLDT WEDAG (DE)
JOCHEM MATTHIAS (DE)
KUEHNE KLAUS (DE)
JOCHEM MATTHIAS (DE)
KUEHNE KLAUS (DE)
International Classes:
C04B7/40; F26B17/10; F26B23/00; F27B7/20; (IPC1-7): C04B7/40; F26B17/10; F26B23/00; F27B7/20
Foreign References:
| DE2400100A1 | 1974-07-25 | |||
| DE2364796A1 | 1974-07-25 | |||
| GB199056A | 1923-06-19 | |||
| DE4340382A1 | 1994-06-16 | |||
| DE3711145A1 | 1988-10-13 |
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