关键词: 锅炉烟气, 湿法脱硫, 旋流, 雾化, 节能

Abstract: In order to solve the problem of low desulfurization efficiency caused by the uneven flow field, small gas-liquid contact area and short contact time in the mass transfer between flue gas and slurry in the tranditional absorption tower, the efficient in-depth desulfurization with swirl spray technology is proposed, which makes full use of the two-phase spray for ultra-fine atomizing and achieves the goals of improving desulfurization efficiency and saving energy. This technology is applied in the desulfurization modification project of a power plant with the flue gas volume of 460 000-m3/h, that is, a slurry swirl spraying layer is added to the original absorption tower. The measurement results show that the desulfurization efficiency is increased by about 6.5% with the outlet SO2 mass concentration lower than 20 mg/m3. In addition, the spraying layer and the swirl spraying layer can be adjusted according to the sulfur contents in the coal to save the system energy consumption.

Key words: flue gas, wet flue gas desulfurization (WFGD), swirl, atomization, energy saving