EP 0348603 A3 19920102 - CONTROL SYSTEM FOR A COUNTER-CURRENT OPERATED TUNNEL FURNACE
Title (en)
CONTROL SYSTEM FOR A COUNTER-CURRENT OPERATED TUNNEL FURNACE
Publication
Application
Priority
DE 3821858 A 19880629
Abstract (en)
[origin: EP0348603A2] Control system for a countercurrent-operated tunnel furnace with smoke-gas control by vacuum in the heating zone and with an upper and a lower temperature limitation carrying out the control of the smoke-gas line, furthermore with a combustion zone regulated as a function of temperature, with rapid cooling regulated as a function of temperature and located at the start of the cooling zone, and with direct suction regulated as a function of temperature and an inflow-air fan regulated as a function of pressure and located at the end of the cooling zone, wherein, according to the invention, when an upper or a lower limit value of the temperature is reached at a point of the cooling zone between the rapid cooling (8) and first direct suction (9), the desired pressure value of the inflow-air fan (11) is adjusted upwards or downwards and thus ensures a variation of the pressure gradient in the furnace, by means of which the control of the smoke-gas fan is influenced. <IMAGE>
IPC 1-7
IPC 8 full level
F27B 9/40 (2006.01); F27D 19/00 (2006.01); F27B 9/12 (2006.01); F27B 9/30 (2006.01)
CPC (source: EP)
F27B 9/40 (2013.01); F27D 19/00 (2013.01); F27B 9/3005 (2013.01); F27B 2009/124 (2013.01); F27D 2019/0018 (2013.01); F27D 2019/0031 (2013.01)
Citation (search report)
- [A] US 3142884 A 19640804 - CROSS OWEN H
- [A] FR 2251790 A1 19750613 - LEISENBERG MANFRED [DE]
- [A] FR 1517633 A 19680315 - KELLER OFENBAU G M B H
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0348603 A2 19900103; EP 0348603 A3 19920102; EP 0348603 B1 19940601; AT E106538 T1 19940615; DE 3821858 C1 19891123; DE 58907741 D1 19940707
DOCDB simple family (application)
EP 89105526 A 19890329; AT 89105526 T 19890329; DE 3821858 A 19880629; DE 58907741 T 19890329