Abstract: The invention improves system efficiency with no waste of heat held by a stopped boiler. A boiler system includes a boiler group having a plurality of boilers and a controller for controlling a combustion state of the boiler group. The controller includes a heat release determiner for determining whether or not the plurality of boilers includes a boiler releasing heat, a boiler increase determiner for determining, when the heat releasing boiler starts combustion and the heat releasing boiler and the other combusting boilers are combusted at equal load factors, whether or not the load factor is higher than a predetermined load factor, and an output controller for combusting the heat releasing boiler when the load factor is determined to be higher than the predetermined load factor.

Abstract: A boiler steam amount measuring method for continuously measuring a temporal change in an amount of steam from a steam boiler, includes: first measuring a differential pressure between a pressure at a first detection position that is a predetermined position in a can body of the steam boiler or a steam outflow path, and a pressure at a second detection position in the steam outflow path separated from the first detection position toward a downstream side; first calculating a pressure loss coefficient based on the differential pressure measured by flowing a predetermined flow rate of steam or fluid instead of steam into the steam outflow path, and the predetermined flow rate; and second calculating continuously the amount of steam based on the differential pressure measured in the first measuring and the pressure loss coefficient calculated in the first calculating, and outputting the calculated amount of steam as a measurement value.

Abstract: The invention improves system efficiency with no waste of heat held by a stopped boiler. A boiler system includes a boiler group having a plurality of boilers and a controller for controlling a combustion state of the boiler group. The controller includes a heat release determiner for determining whether or not the plurality of boilers includes a boiler releasing heat, a boiler increase determiner for determining, when the heat releasing boiler starts combustion and the heat releasing boiler and the other combusting boilers are combusted at equal load factors, whether or not the load factor is higher than a predetermined load factor, and an output controller for combusting the heat releasing boiler when the load factor is determined to be higher than the predetermined load factor.

Abstract: A combustion apparatus for boiler includes an air supply device that varies a supply amount of combustion air, a fuel supply device that varies a supply amount of fuel, and a control device that controls the air supply device and the fuel supply device, obtains the supply amounts in accordance with respective combustion stages, and realizes the multiple combustion stages. The the control device controls the air supply device and the fuel supply device so as to return to a predetermined combustion stage when a request for transition cancel is received during transition from the predetermined combustion stage to another combustion stage, and controls so as not to perform the transition to the other combustion stage until a predetermined time period has elapsed.

Abstract: A boiler steam amount measuring method for continuously measuring a temporal change in an amount of steam from a steam boiler, includes: first measuring a differential pressure between a pressure at a first detection position that is a predetermined position in a can body of the steam boiler or a steam outflow path, and a pressure at a second detection position in the steam outflow path separated from the first detection position toward a downstream side; first calculating a pressure loss coefficient based on the differential pressure measured by flowing a predetermined flow rate of steam or fluid instead of steam into the steam outflow path, and the predetermined flow rate; and second calculating continuously the amount of steam based on the differential pressure measured in the first measuring and the pressure loss coefficient calculated in the first calculating, and outputting the calculated amount of steam as a measurement value.

Abstract: There is provided a boiler capable of preventing occurrence of a trouble accompanying transition cancel while enabling the transition cancel between combustion stages, in the boiler that controls a combustion amount in multiple combustion stages.