TWO-STEP CATALYTIC COMBUSTION APPARATUS, COMBINED GENERATION SYSTEM AND METHOD THEREOF

摘要

A two-stage catalyst combustion apparatus, a combined generating system and a method thereof are provided to prevent environmental pollution by efficiently burning biomass mixed fuel containing ammonia with two-stage catalytic combustion, and to cut down management expenses by simplifying a biomass gas treatment system. A two-stage catalyst combustion apparatus(10) includes a first catalyst combustion unit(20) performing catalytic reduction combustion in reduction by mixing low calorific value fuel containing ammonia with mixed air at a rich phase of fuel, a second catalyst combustion unit(30) performing high temperature catalytic combustion by mixing a rich reaction product with air at a lean phase of fuel, and a CST(Catalytically Stabilized Thermal) combustion chamber(40) burning unreacted products from the second catalyst combustion unit at high temperature with the catalyst. The first catalyst combustion unit has a first mixing chamber(21) spraying fuel through a fuel spray nozzle(22) and flowing mixed air with a first mixed air control damper(26), a first turning mixer(23) mixing fuel with air at the excess air ratio of 0.85 5 to 1.0, and a reduction combustion catalyzing unit(25) formed of a honeycomb coated by catalyst oxidized with ammonia among fuel to burn mixed gas.