Co-combustion of wet sewage sludge in a coal-fired circulating fluidised-bed combustor

摘要

ERmissions of Co, NO_x and N_2O were measured during co-combustion of a mechanically de-watered sewage sludge in a coal-fired circulating-fluidsed-bed combustor (CFBC). The test facility had a height of 15 m and was operated at a gas velocity of about 6.3 m s~1 so that gas residence times similar to those in large-scale combusors were achieved. The combustion chamber, the primary cyclone and the downcomer were heated electrically to compensate for heat losses and thus to ensure uniform temperature throughout the system.