The invention discloses a condensing dioxygen method desulfuration denitration integration device and a process thereof. The integration device comprises a boiler room
smoke vent, a first level dry type dust removing device, an induced draft fan, a second level wet type dust removing device, a comprehensive desulfuration denitration
tower and a
chimney which are sequentially connected through flues. An
ozone filling device is disposed on the
flue on which the first level dry type dust removing device is connected with the induced draft fan. A liquid inlet of the second level wet type dust removing device and a liquid inlet of the comprehensive desulfuration denitration
tower are both connected with a circulating water tank. A liquid outlet of the second level wet type dust removing device is connected with a
precipitation water tank. A liquid outlet of the comprehensive desulfuration denitration
tower and a liquid outlet of the
precipitation water tank are both connected with the circulating water tank. A liquid outlet of the circulating water tank is connected with a
crystallization tower, and a liquid outlet of the
crystallization tower is connected with the circulating water tank. By means of a set of device, the process adopts the dry and wet method for desulfurating, denitrating and dedusting
smoke of
coal-fired boilers, and has the advantages of being high in energy efficiency, stable in operation, little in investment, low in operation cost, strong in applicability and free of secondary
pollution, treating wastes with processes of wastes, recycling by-products and the like.