Three-stage Circulating Flue Gas Desulfurization

The unique integrated solution of three-stage circulating flue gas desulfurization, denitration and dust removal of Shandong Greenism Environmental Protection Technology Co., Ltd. is to build a desulfurization, denitration and dust removal integrated tower, the tower body is composed of stage one circulating desulfurization part, stage two circulating denitration and oxidation part, stage three circulating denitration absorption part and ultra clean demister from bottom to top, and the original flue gas passes through the integrated tower to realize SO2 removal and ultra-low emission of NOx and dust. Among them, limestone gypsum wet desulfurization process is used in the first stage circulating desulfurization part, compound double oxygen oxidation denitration process is used in the second stage circulating denitration oxidation part, and sodium alkali absorption denitration process is used in the third stage circulating denitration absorption part.

Process features:

            (1) It solved the problem of denitration of chain furnace, and created the first integrated solution of desulfurization, denitration and dust removal in chain furnace, kiln, incinerator and other fields.

            (2) The efficiency of desulfurization and denitration is high. The treated flue gas can reach the most stringent ultra-low emission standards of air pollutants: SO2 ≤ 35mg / Nm3; NOx ≤ 50mg / Nm3; dust ≤ 5mg / Nm3.

            (3) Low investment. Under the premise of the same effect of flue gas desulfurization and denitration, compared with the separate treatment of flue gas desulfurization and denitration, our unique three-stage circulating desulfurization, denitration and dust removal integration scheme reduces the investment for users.

            (4) The operation cost is low. Desulfurization comes first, then oxidation, which can save a lot of oxidants and reduce the operation cost of oxidants. In addition, cheap limestone, magnesia and other absorbents are used in the first stage of circulating desulfurization, and expensive NaOH is used in the third stage of denitration, which not only achieves the purpose of desulfurization and denitration, but also reduces the operation cost of desulfurization and denitration.

            (5) Reduce the floor space of the flue gas desulfurization, denitration and dust removal device. The three-stage circulating desulfurization, denitration and dust removal integrated tower has the advantages of small floor area, compact layout and simple installation. It is especially suitable for the desulfurization, denitration and dust removal reconstruction project in the built plant area with small reserved space and limited site location.