Flue gas desulfurization and denitration integrated system of sintering machine

The invention discloses a flue gas desulfurization and denitration integrated system of a sintering machine. The flue gas desulfurization and denitration integrated system comprises a pretreatment chamber, an absorption tower and demister outside a tower, wherein the pretreatment chamber comprises a flue gas inlet, a wetting, cooling, pre-dusting and desulfurization area, an oxidation reaction area and a primary absorption area; the pretreatment chamber is internally provided with a guide wall; a plurality of nozzles are arranged in the wetting, cooling, pre-dusting and desulfurization area and the oxidation reaction area; the oxidation reaction area is arranged between the wetting, cooling, pre-dusting and desulfurization area and the primary absorption area to form an independent reaction zone; and low-valence insoluble nitric oxide in flue gas is fully oxidized into high-valence soluble nitric oxide. The flue gas desulfurization and denitration integrated system has the beneficial effects that a novel flue gas purifying technology for integration of desulfurization and denitration is researched and developed and is obviously better than a single desulfurization technology and a single denitration technology in technological aspect and economical efficiency, and the flue gas desulfurization and denitration integrated system is a new generation of flue gas purifying technology with bright prospect and promotional value.