Combustion device

Abstract

[Object] To provide a combustion device capable of suppressing poisoning and deterioration of a CO oxidation catalyst due to adhesion of S (sulfur) to the CO oxidation catalyst, which is provided in the combustion device such as a boiler for the purpose of reducing and removing the CO in the combustion gas. [Solving Means] Provided is a combustion device including at least one can body which has a gas flow passage R allowing passage of a combustion gas G 1 generated at a burner 16 and which heats a heat medium through heat exchange with the combustion gas G 1 passing through the gas flow passage R, in which, in the gas flow passage R, a CO oxidation catalyst C 1 is arranged in a region corresponding to a temperature range at the time of passing of the combustion gas G 1 where adhesion of S (sulfur) contained in the combustion gas G 1 to the CO oxidation catalyst C 1 is suppressed.

1 . A combustion device comprising at least one can body which has a gas flow passage allowing passage of a combustion gas generated at a burner and which heats a heat medium through heat exchange with the combustion gas passing through the gas flow passage,
 wherein, in the gas flow passage, a CO oxidation catalyst is arranged in a region corresponding to a temperature range at the time of passing of the combustion gas where adhesion of S (sulfur) contained in the combustion gas to the CO oxidation catalyst is suppressed.   
   
   
       2 . A combustion device according to  claim 1 , wherein the CO oxidation catalyst is formed by connecting together adjacent water tubes of a water tube group constituting the can body. 
   
   
       3 . A combustion device according to  claim 1 , wherein the CO oxidation catalyst is arranged in a space formed in a water tube group constituting the can body. 
   
   
       4 . A combustion device according to  claim 3 , wherein the can body has an opening in a side thereof, and wherein the CO oxidation catalyst can be inserted into and extracted from the opening. 
   
   
       5 . A combustion device according to  claim 1 , wherein the CO oxidation catalyst is arranged so as to divide the gas flow passage into an upstream side portion and a downstream side portion, and wherein all the combustion gas passing through the gas flow passage passes through the CO oxidation catalyst. 
   
   
       6 . A combustion device according to  claim 1 , wherein the CO oxidation catalyst is arranged in the gas flow passage in the can body.