Patent ID: 9644511
Date: 2017-05-09
CPC Classifications: B01D,F01N

Claim:
1. A combustion gas cooling apparatus, comprising: a first duct including a first flow inlet into which a combustion gas travels, and a first flow outlet which allows the combustion gas traveling from the first flow inlet to exhaust; a cooling duct arranged in the first duct which introduces a cooling gas to the first duct at a temperature lower than the combustion gas to generate a mixed gas in which the combustion gas and the coolant gas are mixed; and a second duct including a second flow inlet which is connected to the first duct and into which flow the mixed gas, and a second flow outlet which allows the mixed gas flowing from the second flow inlet to flow out, wherein conditional expression (1″) is satisfied: wherein H 1 is maximum width of the first flow inlet in a first direction orthogonal to the combustion gas flow; H 2 is maximum width of the first flow outlet in the first direction; H 3 ″ is maximum width of the second flow inlet in the first direction; H 4 ″ is maximum width of the second flow outlet in the first direction; L 1 is passage length of the first duct and L 2 is passage length of the second duct; and wherein (H