METHOD FOR CONTROLLING CALORIFIC VALUE OF GAS AND APPARATUS FOR CONTROLLING CALORIFIC VALUE OF GAS

摘要

A gas calorific value control method is provided which is capable of suppressing a calorific value fluctuation of a fuel gas and supplying the fuel gas as a stabilized fuel gas. The gas calorific value control method includes the steps of suppressing a calorific value fluctuation of a fuel gas to be supplied to a combustion system (2) by subjecting the fuel gas to time-lag mixing within a tank (5) formed with a gas inlet (6) and a gas outlet (7) separately; measuring a calorific value fluctuation of the fuel gas having been thus suppressed; and decreasing or increasing a calorie of the fuel gas at a location downstream of the tank (5) so that the calorific value fluctuation thus measured falls within an allowable fluctuation range for the fuel gas to become usable in the combustion system (2).