Patent ID: 7056478

Claim:
An emission treatment system for removing NO x from flue gas emitted through an outlet end of a vertically extending stack from one or more burners disposed at an inlet end of the stack, the system comprising: a diversion member disposed in the stack and adapted for closing the stack at a position intermediate the inlet and outlet ends; a major component module including a first sub-module having an inlet and an SCR segment, at second sub-module having a heat exchange segment, and a third sub-module having an ID fan and an outlet, each of the sub-modules having a size and weight within size and weight limitations or a conventional flat-bed tractor trailer, the second sub-module being mountable between the first and third sub-modules, whereby the major component module defines a flue gas flow path extending from the inlet of the first sub-module to the outlet of the third sub-module; inlet ductwork adapted for providing a passageway from the stack to the inlet of the first sub-module, the inlet ductwork being attached to the stack at a position intermediate the inlet end of the stack and the diversion member; outlet ductwork adapted for providing a passageway from the outlet of the third sub-module to the stack, the outlet ductwork being attached to the stack at a position intermediate the diversion member and the outlet end of the stack; and an ammonia addition subsystem adapted for injecting ammonia vapor into the inlet ductwork.