Industrial Boiler Case Studies (Using Double Herringbone Furnace Arches) A Stoker Boiler in a Paper Mill after retrofitting furnace arches and duct system 。 steam capacity increases from 28t/h to 38t/h can burn cheap,local coal saves about 200,000 RMB per month,1 month ROl A Stoker Boiler in a Shipbuilding Company after retrofitting furnace arches thermal efficiency increases from 69.3%to 77.6% coal saving 2925 t/a;CO2 reduction 5639 t/a 。6 month ROlIndustrial Boiler Case Studies (Using Double Herringbone Furnace Arches) ■ A Stoker Boiler in a Paper Mill after retrofitting furnace arches and duct system ● steam capacity increases from 28t/h to 38t/h ● can burn cheap, local coal ● saves about 200,000 RMB per month, 1 month ROI ■ A Stoker Boiler in a Shipbuilding Company after retrofitting furnace arches ● thermal efficiency increases from 69.3% to 77.6% ● coal saving 2925 t/a; CO2 reduction 5639 t/a ● 6 month ROI