EP 0459603 B1 19931110 - Process and apparatus for continuous drying of wood chips, wood fibres or other bulk materials.
Title (en)
Process and apparatus for continuous drying of wood chips, wood fibres or other bulk materials.
Title (de)
Verfahren und Anlage zur kontinuierlichen Trocknung von Holzspänen, Holzfasern oder anderen Schüttgütern.
Title (fr)
Procédé et dispositif pour le séchage continu de copeaux de bois, de fibres de bois ou d'autres matières en vrac.
Publication
Application
Priority
DE 4017806 A 19900601
Abstract (en)
[origin: EP0459603A1] The process according to the invention, in which the heat from flue gases generated in a combustion chamber is utilised in a drier charged with the material to be dried, is characterised in that the flue gas-free vapours leaving the drier are recirculated to the drier and, upstream of the drier, heated indirectly by the flue gases leaving the combustion chamber to the temperature required for drying the material to be dried, a vapour part-stream being branched off from this circulation and taken to the combustion chamber. <??>The apparatus for carrying out the process provides that, from the cyclone or cyclones (12) used in such processes for precipitating the dry material, a pipe (13) for the vapours leads back to the drier (8), that a heat exchanger (7) for the indirect heating of the vapours by the flue gases leaving the combustion chamber (1) is arranged in the pipe (13), and that a line (6), branching off from the pipe (13) upstream of the heat exchanger (7) in the direction of flow and leading to the combustion chamber (1), is provided. This invention makes it possible, at low cost, to maintain lower pollutant emission limits than those hitherto prescribed, to improve the efficiency and at the same time to reduce the explosion risk. <IMAGE>
IPC 1-7
IPC 8 full level
C02F 11/12 (2006.01); F01N 3/02 (2006.01); F26B 3/02 (2006.01); F26B 21/00 (2006.01); F26B 21/02 (2006.01); F26B 21/04 (2006.01); F26B 23/02 (2006.01); F26B 23/10 (2006.01)
CPC (source: EP US)
F26B 21/04 (2013.01 - EP US); F26B 23/022 (2013.01 - EP US); F26B 2200/24 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI SE
DOCDB simple family (publication)
EP 0459603 A1 19911204; EP 0459603 B1 19931110; AT E97225 T1 19931115; AU 7806091 A 19911205; CA 2043681 A1 19911202; CS 163591 A3 19920219; CZ 280448 B6 19960117; DE 4017806 A1 19911205; DE 59100574 D1 19931216; ES 2046848 T3 19940201; FI 912615 A0 19910531; FI 912615 A 19911202; JP H04227464 A 19920817; RU 2023964 C1 19941130; US 5237757 A 19930824; ZA 914130 B 19920325
DOCDB simple family (application)
EP 91250134 A 19910515; AT 91250134 T 19910515; AU 7806091 A 19910530; CA 2043681 A 19910531; CS 163591 A 19910531; DE 4017806 A 19900601; DE 59100574 T 19910515; ES 91250134 T 19910515; FI 912615 A 19910531; JP 12793091 A 19910530; SU 4895596 A 19910531; US 70668791 A 19910528; ZA 914130 A 19910530