Method and system for removing sulfur, phosphorus and nitrogen oxides in yellow phosphorus tail gas gas-fired boiler from ground phosphate rock

The invention relates to the technical field of phosphorus chemical industry and environmental protection, in particular to a method and system for removing sulfur, phosphorus and nitric oxide in a yellow phosphorus tail gas gas-fired boiler through ground phosphate rock. The method comprises the fo...

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Bibliographische Detailangaben
Hauptverfasser: LI FUJIN, LI ZHAOXI, XIE DELONG, SHI YUANLIANG, ZHU YUAN, NIE YUNXIANG, MEI YI
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to the technical field of phosphorus chemical industry and environmental protection, in particular to a method and system for removing sulfur, phosphorus and nitric oxide in a yellow phosphorus tail gas gas-fired boiler through ground phosphate rock. The method comprises the following steps: (1) carrying out combustion reaction on yellow phosphorus tail gas and oxygen-containing gas to obtain high-temperature flue gas; (2) under the thermal action of the combustion reaction, enabling powdered rock phosphate to be in a fluidized state, carrying out a calcination reaction, carrying out dephosphorization treatment on the obtained calcination reaction product and P2O5 in the high-temperature flue gas, and carrying out heat exchange on the obtained high-temperature dephosphorized flue gas to obtain low-temperature dephosphorized flue gas; (3) mixing the dephosphorized slag obtained by dephosphorizing treatment with slurry containing elemental phosphorus to obtain a desulfurization and denitri