The utility model provides a
flue gas circulation
oxygen-rich
incineration system for nitrogenous organic
waste gas and / or waste liquid, which comprises an incinerator, a
combustion-supporting
gas burner, a waste liquid burner and / or
waste gas burner are arranged on the incinerator, the
combustion-supporting
gas burner is connected with a gas delivery
pipe through a pipeline, and the
flue gas circulation
oxygen-rich
incineration system further comprises a
waste heat boiler connected with the incinerator through a pipeline. The
waste heat boiler is connected with a
flue gas conveying pipeline and a low-pressure steam or high-temperature hot water recycling conveying pipeline; a gas inlet of the
flue gas drying tower is communicated with a
flue gas conveying pipeline, a gas outlet of the
flue gas drying tower is connected with a first output
pipe, the first output
pipe is connected with a first three-way valve, and the first three-way valve is respectively connected with a first conveying pipe and a second conveying pipe; the
oxygen supply unit is connected with a mixer through a pipeline, the mixer is connected with a first conveying pipe, and an outlet of the mixer is connected with the
combustion-supporting
gas burner, the waste liquid burner and / or the
waste gas burner through pipelines. According to the utility model, the heat
utilization rate is improved, and the flue gas denitration cost is reduced.