| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for multi-point measuring gas component concentration in gas, capable of stably measuring gas composition in flue gas.SOLUTION: A boiler system 100 comprises: an ammonia injection unit 104 which is reducing agent supply means for supplying a reducing agent into flue gas 102 from a boiler 101; a denitration unit 105 having a denitrification catalyst 106 for denitrating NOx in the flue gas 102 including the reducing agent; devices 50A to 50C for measuring gas component concentration provided at the entrance side and the outlet side of the denitration unit 105, for measuring gas component concentration by laser measurement means which measures NOx concentration distribution in flue gas at multiple points; and an aperture setting unit 109 which measures NOx concentration at multiple points according to the measurement results of the devices 50A to 50C for measuring gas component concentration and which is control means for adjusting the amount of ammonia supplied from the ammonia injection unit 104 when any of the measured NOx concentration at multiple points is a predetermined value or higher. |
