Connected combustion system

Abstract

A connected combustion system detects a failure in any of combustors connected in the system and each including a burner with its combustion state used for feedback. Each combustor includes a combustion sensor that detects the combustion state in the burner, and a detection value is used for feedback. When the detection value deviates from a predetermined normal range, at least one of a fuel gas supply or an air supply is corrected to cause the detection value to be within the normal range. The combustion state in the burner is thus adjusted. When the combustion sensor in any of the combustors has a detection value deviating from the normal range and the combustion sensor in another combustor operating simultaneously with the above combustor has a detection value within the normal range, the combustor having the detection value deviating from the normal range is determined to have a failure.

1 . A connected combustion system, comprising:
 a plurality of combustors connected in parallel to receive fuel gas from a same gas source, each of the plurality of combustors including a burner and having a combustion amount controllable based on a total amount of heat to be used, each of the plurality of combustors including
 a gas regulator configured to regulate a supply of the fuel gas to the burner based on the combustion amount, 
 an air regulator configured to regulate a supply of air to the burner based on the combustion amount, 
 a combustion sensor configured to detect a combustion state in the burner, and 
 a corrector configured to correct, when the combustion sensor has a detection value deviating from a predetermined normal range, at least one of the supply of the fuel gas or the supply of the air to cause the detection value to be within the normal range; and 
   a determiner configured to determine that a first combustor of the plurality of combustors has a failure when the combustion sensor in the first combustor has a detection value deviating from the normal range and the combustion sensor in a second combustor of the plurality of combustors operating simultaneously with the first combustor has a detection value within the normal range.   
     
     
         2 . The connected combustion system according to  claim 1 , wherein
 when the combustion sensor in the first combustor has a detection value deviating from the normal range after correction is performed by the corrector, the determiner determines that the first combustor has a failure of a first level and prohibits an operation of the first combustor, and   when the combustion sensor in the first combustor has a detection value within the normal range after correction is performed by the corrector, the determiner determines that the first combustor has a failure of a second level and permits an operation of the first combustor.   
     
     
         3 . The connected combustion system according to  claim 2 , further comprising:
 a storage configured to store information about the first combustor determined to have the failure of the second level by the determiner; and   a display configured to display the information stored in the storage.   
     
     
         4 . The connected combustion system according to  claim 1 , wherein
 when the combustion sensor in the first combustor has a detection value deviating from the normal range and the combustion sensor in the second combustor operating simultaneously with the first combustor has a detection value deviating from the normal range, the determiner determines that at least one of a composition of the fuel gas or a density of the air has an anomaly.   
     
     
         5 . The connected combustion system according to  claim 2 , wherein
 when the combustion sensor in the first combustor has a detection value deviating from the normal range and the combustion sensor in the second combustor operating simultaneously with the first combustor has a detection value deviating from the normal range, the determiner determines that at least one of a composition of the fuel gas or a density of the air has an anomaly.   
     
     
         6 . The connected combustion system according to  claim 3 , wherein
 when the combustion sensor in the first combustor has a detection value deviating from the normal range and the combustion sensor in the second combustor operating simultaneously with the first combustor has a detection value deviating from the normal range, the determiner determines that at least one of a composition of the fuel gas or a density of the air has an anomaly.