CONSTANT DIRECTION REGENERATIVE SELECTIVE CATALYTIC REDUCTION

摘要

A regenerative selective catalytic reduction process includes providing a gas stream to be treated containing NOX, introducing a reactant into the gas stream, and directing the gas stream into contact with a catalyst to cause at least some of the NOX contained in the gas stream to be reduced, wherein the gas stream is adapted to flow past the catalyst along the same flow direction throughout the process in a substantially continuous manner. The process also includes heating the gas stream with a heater upstream of the catalyst to provide supplemental heat to the gas stream from a first heat exchanger during a first cycle, and to provide supplemental heat to the gas stream from a second heat exchanger using the same heater during a second cycle.

主权项

1. A regenerative selective catalytic reduction process, comprising:
providing a gas stream to be treated containing NOX; introducing a reactant into the gas stream; directing the gas stream into contact with a catalyst to cause at least some of the NOX contained in the gas stream to be reduced, wherein the gas stream is adapted to flow past the catalyst along the same flow direction throughout the process in a substantially continuous manner wherein:
the gas stream is heated by directing the gas stream through a first heat exchanger, and the gas stream is cooled by directing the gas stream through a second heat exchanger during a first system cycle, andthe gas stream is heated by directing the gas stream through the second heat exchanger, and the gas stream is cooled by directing the gas stream through the first heat exchanger during a second system cycle; and heating the gas stream with a heater upstream of the catalyst to provide supplemental heat to the gas stream from the first heat exchanger during the first cycle, and to provide supplemental heat to the gas stream from the second heat exchanger using the same heater during the second cycle.