UREA DIRECT-INJECTION PYROLYSIS DENITRIFICATION DEVICE ARRANGED INSIDE OUTLET FLUE DUCT OF GAS TURBINE

摘要

Provided is a urea direct-injection pyrolysis denitrification device arranged inside of an outlet flue duct of a gas turbine. The outlet flue duct of the gas turbine is connected to the inlet of a chimney by means of a waste heat boiler. A catalyst module is provided in the waste heat boiler. Urea direct-injection pyrolysis spray guns are all located in the outlet flue duct of the gas turbine, and the urea direct-injection pyrolysis spray guns are evenly distributed along the same cross-section of the outlet flue duct of the gas turbine. One metering module corresponds to one urea direct-injection pyrolysis spray gun. Each metering module comprises a mixer, a first manual valve, a second manual valve, an automatic regulating valve and a self-operated pressure reducing valve. A urea solution input pipeline is in communication with the inlet of the mixer by means of the first manual valve and the automatic regulating valve. A demineralized water input pipeline is in communication with the inlet of the mixer by means of the second manual valve and the self-operated pressure reducing valve. The outlet of the mixer is in communication with the inlet of a urea direct-injection pyrolysis spray gun. The device may implement automatic partitioning and adjustment and has low energy consumption.