... loss of incompletely burning6) Adopt big grate, leak no coal, ventilate equally, clear airway itself,burn steadily7) All single ... national standard8) Soot idiomatically separate at the exit of boiler furnace, reduce ashcontent and lessen abrasion of back heat ... period and reduces the cost of boiler house10) Big water volume benefits for power-off protection, fits load waving Coal Fired Steam Boiler