GAS TURBINE APPARATUS, LOW CALORIE CONTENT GAS FEEDING APPARATUS, AND METHOD OF SUPPRESSING RISE OF CALORIE CONTENT OF THE GAS

摘要

A gas turbine apparatus, a low calorie content gas feeding apparatus capable of feeding a low calorie content gas as a fuel for gas turbine stabilized by suppressing the sudden rise of its calorie content, and a method of suppressing the rise of calorie content of the gas. The low calorie content gas feeding apparatus comprises a low calorie content gas feed pipe (3) feeding the low calorie content gas to a gas turbine (2), an exhaust gas feed pipe (4) feeding exhaust gas to the low calorie content gas feed pipe (3), a first mixer (6) disposed in a connection part between the low calorie content gas feed pipe (3) and the exhaust gas feed pipe (4), a calorimeter (11) disposed in the low calorie content gas feed pipe (3) and detecting a heated value in the gas, an oxygen analyzer (15) installed on the downstream side of the first mixer (6) in the low calorie content gas feed pipe (3), and a controller (100). The controller (100) feeds the exhaust gas from the exhaust gas feed pipe (4) when the detection value of the calorimeter (11) exceeds a reference value, and based on the detected results of the oxygen analyzer (15), controls an exhaust gas mixing ratio so that it does not come into the inflammable limit of the low calorie content gas.