Boiler flue gas circulation system, control method thereof and boiler

The invention relates to a boiler flue gas circulation system, a control method thereof and a boiler, and the boiler flue gas circulation system comprises an air pre-heater; the primary air fan is used for introducing primary air into the air pre-heater; the inlet end of the air inducing pipeline is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ZHU XINLONG, WANG MIN, SONG LINBO, ZHANG TAO, WANG JIAXING, DONG YONGSHENG, LI QIANG, ZHUANG XUZENG, CUI JIEMING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AIR AIR SUPPLY BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES DRAUGHT-INDUCING HEATING LIGHTING MECHANICAL ENGINEERING METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a boiler flue gas circulation system, a control method thereof and a boiler, and the boiler flue gas circulation system comprises an air pre-heater; the primary air fan is used for introducing primary air into the air pre-heater; the inlet end of the air inducing pipeline is communicated with the air pre-heater, the outlet end of the air inducing pipeline is communicated with the chimney, and an induced draft fan is arranged on the air inducing pipeline; the inlet end of the flue gas recirculation pipeline is connected to the induced draft pipeline and located between the outlet of the induced draft fan and the chimney, a gas taking point is formed, and the outlet end of the flue gas recirculation pipeline is connected to the inlet of the primary fan; the first isolation door is arranged at the position, close to the gas taking point, of the flue gas recirculation pipeline in an on-off mode; the second isolation door is arranged at the position, close to the primary air fan, of the fl