Process and apparatus for reducing pollutant emissions in flue g

Details Process and apparatus for reducing pollutant emissions in flue g Process and apparatus for reducing pollutant emissions in flue g

1991-05-13

1992-04-21

Yuen, Henry C.

Furnaces

Process

Treating fuel constituent or combustion product

110244, 110245, F23J 1100

Patent

active

051057476

ABSTRACT:
A combustion process and apparatus for simultaneously reducing nitrogen oxides, sulfur oxides and hydrogen chloride in a high temperature furnace. A combustible material is introduced and combusted within the furnace, forming a primary combustion zone. Combustion air, sorbent and a first portion of hydrocarbon fuel are mixed and combusted within a calciner to form a product gas/calcined sorbent mixture. The product gas/calcined sorbent mixture and a remaining portion of fuel are injected into the furnace, forming an oxygen deficient secondary combustion downstream of the primary combustion zone. Overfire air is injected into the furnace, forming an oxidizing tertiary combustion zone downstream of the oxygen deficient secondary combustion zone.

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