Patent ID: 6279495
Filing Date: 2001-08-28
Classification: D21C,F23C,F23L

Abstract:
A method of optimizing the combustion air system of a four wall recovery boiler having primary and secondary air flow elevations, said method comprising:a) introducing air flow at the primary and secondary elevations through air ports on all four walls of the boiler; andb) interlacing air flow at the secondary elevation by alternately opening wide and partly closing port dampers of said air ports on each wall to establish wide open air ports and partially open air ports, so that wide open dampers on one wall oppose partly closed dampers on the opposite wall and wherein the air flow at the primary elevation is balanced by adjusting port dampers and windbox pressures so that the air flow is evenly distributed between opposing walls, between all four walls and, between individual air ports on each wall of the boiler at said primary elevation.