JPS643471A - Direct firing generator - Google Patents

Abstract

PURPOSE: To increase a heat exchange amount of a liquid with a combustion gas as an overall generator by arranging a solution tube group provided near both side inner walls of a combustion gas passage in more concentrated manner than a solution tube group provided at the other part of the passage. CONSTITUTION: A combustion gas inverted from a flue 4 via a smoke chamber 5 and introduced into a combustion gas passage 6 is partly fed along both side inner walls of the passage 6 on the way of moving from an upstream side to a downstream side of the passage, but fed while heat exchanging with absorption liquids in solution tubes 9a, 9b arranged mostly near both sides of the passage 6 and a center. And, since an arranging pitch of the tubes 9a, 9b near both sides of the passage 6 is constituted smaller than that of the tubes 9a, 9b, heat exchange of the gas near both sides of the passage 6 with the absorption liquid is expedited, and an amount of the gas flowing along both side inner walls of the passage 6 as remained at a high temperature is reduced. Further, since a heat exchanger area of the combustion gas with the liquid near both sides of the passage 6 is increased, a heat exchange heat amount is also increased.