Global Patent Index - EP 0363812 A3

EP 0363812 A3 19910227 - METHOD AND INSTALLATION FOR GENERATING STEAM, ESPECIALLY IN HEAT POWER PLANTS

Title (en)

METHOD AND INSTALLATION FOR GENERATING STEAM, ESPECIALLY IN HEAT POWER PLANTS

Publication

EP 0363812 A3 19910227 (DE)

Application

EP 89118445 A 19891004

Priority

DE 3834801 A 19881010

Abstract (en)

[origin: EP0363812A2] The fluidised bed technique is used in generating steam in heat power plants in order to avoid the aftertreatment of flue gases for the purpose of reducing toxic constituents. In this process, the coal is burned at relatively low temperatures of around 850 DEG C, none or scarcely any thermal nitrogen oxide being formed in the fluidised bed of coal and lime, and SO2 which forms being converted to calcium sulphate. However, due to the low temperatures there is a higher emission of CO, especially in part-load operation. In order to reduce the latter, heat is additionally supplied to the free space above the fluidised bed, with the result that it is possible to achieve the purpose of influencing the temperature of the free space independently of that of the fluidised bed, and substantially to increase the conversion of CO to CO2. A reduction in the NOx values can further be achieved by restricting the quantity of air to be supplied to the fluidised bed below the stoichiometrically necessary additional supply of air to the free space while simultaneously supplying heat. <IMAGE>

IPC 1-7

F23C 11/02

IPC 8 full level

F23C 10/00 (2006.01)

CPC (source: EP)

F23C 10/002 (2013.01)

Citation (search report)

  • [Y] US 4308810 A 19820105 - TAYLOR THOMAS E
  • [Y] GB 2192141 A 19880106 - POLITECHNIKA SLASKA IM WINCENT
  • [A] US 4543894 A 19851001 - GRISWOLD CHARLES F [US], et al
  • [A] GB 2023268 A 19791228 - WORSLEY & CO LTD G P
  • [A] PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 22 (M-354)[1745], 30. Januar 1985; & JP-A-59 167 608 (BABCOCK) 21-09-1984
  • [A] PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 191 (M-322)[1628], 4. September 1984; & JP-A-59 81 408 (BABCOCK) 11-05-1984
  • [A] PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 381 (M-547)[2438], 19. Dezember 1986; & JP-A-61 173 012 (HITACHI) 04-08-1986

Designated contracting state (EPC)

AT BE CH DE ES FR GB GR IT LI LU NL SE

DOCDB simple family (publication)

EP 0363812 A2 19900418; EP 0363812 A3 19910227

DOCDB simple family (application)

EP 89118445 A 19891004