Infinitely Variable Injector For Improved SNCR Performance

摘要

A system for controlling a reagent flow to a furnace in a SCNR process includes at least one injection distribution module (IDM) for supplying water to a plurality of injection lances, metering valves for supplying a NOx reducing agent to the plurality of injection lances, wherein the reagent injection rate of each injection lance is controlled by one metering valve such that a reagent concentration in each injection lance is adjustable and variable from one another. A method for controlling a reagent flow to a furnace includes providing at least one IDM, and for each IDM, providing a plurality of injection lances in communication with the IDM, supplying water to the plurality of injection lances through the IDM and supplying a NOx reducing agent through metering valves, wherein each metering valve controls the reagent injection rate to one injection lance.

主权项

1. A system for controlling a reagent flow to a furnace during fuel combustion in a selective non-catalytic reduction (SNCR) process, said system comprising:
at least one injection distribution module connected to a water supply, wherein each injection distribution module is in communication with a plurality of injection lances and supplies water from the water supply, through said injection distribution module, to said plurality of injection lances, wherein each of said plurality of injection lances is in communication with a metering valve mounted on a waterline upstream of said injection lance and downstream of said injection distribution module, and wherein said metering valve supplies a reagent solution and controls the reagent injection rate to said injection lance such that a reagent concentration in each of said plurality of injection lances is adjustable and variable from one another.