Double-alkali flue gas desulfurization oxidation tank

Abstract

The invention relates to the field of flue gas desulfurization equipment for medium and small coal-fired boilers, and in particular discloses a double-alkali flue gas desulfurization oxidation tank. The double-alkali flue gas desulfurization oxidation tank comprises an aeration region and a settling region which are arranged vertically. The oxidation tank is characterized in that: an oxidation air main pipe and a plurality of primary branched pipes which are uniformly distributed and communicated with the oxidation air main pipe are arranged above the liquid level of the oxidation tank, the primary branched pipes are connected with secondary branched pipes which are uniformly distributed in the aeration region, the secondary branched pipes are connected through flanges, an aerator is arranged at the tail end of each secondary branched pipe, each aerator is a cross porous pipe, a reflecting plate is arranged on the upper part of each aerator, and a flat straight oar type stirrer is arranged in the settling region. The oxidation tank is unique in structure; and through the oxidation tank, air is distributed uniformly, the gas-liquid contact area is enlarged, and the oxidation efficiency is remarkably improved.

Description

(1) Technical field [0001] The invention relates to the field of flue gas desulfurization equipment for small and medium-sized coal-fired boilers, in particular to a double-alkali flue gas desulfurization oxidation tank. (2) Background technology [0002] At present, the desulfurization process of small and medium-sized coal-fired power plants in my country is constantly developing. The double-alkali desulfurization process occupies a large proportion in the market due to its advantages of high desulfurization efficiency and low investment cost. However, the oxidation link in the double-alkali desulfurization process There have always been some insurmountable problems. [0003] The oxidation aeration of the traditional double-alkali method adopts the method of opening holes in the bottom of the tank. This method is extremely prone to blockage and difficult to maintain, resulting in uneven distribution of oxidized air and poor oxidation effect. The follow-up research of l...

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Problems solved by technology

[0002] At present, the desulfurization process of small and medium-sized coal-fired power plants in my country is constantly developing. The double-alkali desulfurization process occupies a large proportion in the market due to its advantages of high desulfurization efficiency and low investment cost. However, the oxidation link in the double-alkali desulfurization process There have been some insurmountable problems

[0003] The oxidation aeration of the traditional double-alkali method adopts the method of opening holes in the bottom of the tank. This method is extremely prone to blockage and difficult to maintain, resulting in uneven distribution of oxidized air and poor oxidation effect. The follow-up research of legal engineering found that the oxidation air utilization rate is generally lower than 20%, the gypsum oxidation efficiency is less than 60%, and the continuous operation does not exceed 2500h

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