Abstract: A flow channel forming plate has a gas path surface which comes into contact with combustion gas, an opposite gas path surface which faces a side opposite to the gas path surface, an end surface formed at a circumferential edge on the gas path surface, and a lateral passage formed between the gas path surface and the opposite gas path surface and in which cooling air flows. The end surface has a rear end surface, a front end surface, and a lateral end surface. The lateral passage has, along the gas path surface and the lateral end surface, a main passage portion extending in a direction in which the lateral end surface extends, and one or more narrow passage portions extending from an end of the main passage portion on a downstream side toward the rear end surface and opening on the rear end surface.

Abstract: A fluidized bed combustor wherein a combustion chamber and a regeneration chamber are both contained in a single hollow body is provided. These two chambers are formed by vertically partitioning the body by a partition wall, which has an upper opening and a lower one, and also each have a perforated plate at the bottom part thereof on which a heat transfer medium containing a desulfurizing agent is placed and fluidized. The desulfurizing agent is transferred from the combustion chamber through the lower opening to the regeneration chamber and circulated by overflow through the upper opening again to the combustion chamber. Various modifications of the above-mentioned fundamental embodiment are proposed. Combustion and desulfurization are automatically and effectively carried out in a single apparatus to give a high percentage desulfurization, make the apparatus compact, and reduce the initial cost and the running cost thereof.

Abstract: A fluidized bed combustor wherein a combustion chamber and a regeneration chamber are both contained in a single hollow body is provided. These two chambers are formed by vertically partitioning the body by a partition wall, which has an upper opening and a lower one, and also each have a perforated plate at the bottom part thereof on which a heat transfer medium containing a desulfurizing agent is placed and fluidized. The desulfurizing agent is transferred from the combustion chamber through the lower opening to the regeneration chamber and circulated by overflow through the upper opening again to the combustion chamber. Various modifications of the above-mentioned fundamental embodiment are proposed. Combustion and desulfurization are automatically and effectively carried out in a single apparatus to give a high percentage desulfurization, make an apparatus compact, and reduce an initial cost and a running cost thereof.