摘要
为解决传统吸收塔内烟气与浆液传质过程中流场不均匀、气液接触面积小、接触时间短所导致的脱硫效率低问题,提出一种基于旋流雾化的高效深度脱硫技术。该技术利用两相流喷嘴的超细雾化喷射作用,可达到提高脱硫效率和降低系统能耗目的。采用该技术对广东某电厂烟气量(标准状态)为464 000 m3/h的脱硫工程进行了改造,即在原脱硫吸收塔基础上新增1层浆液旋流雾化喷射层,实测结果表明,脱硫效率可提高约6.5%,出口SO2质量浓度(标准状态)可低于20 mg/m3。此外,可根据煤中硫分调整喷淋层与旋流雾化喷射层的组合,以降低系统能耗。
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-m^3/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 SO, mass concentration lower tban 20 mg/m^3. 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.
出处
《中国电力》
CSCD
北大核心
2015年第8期130-134,140,共6页
Electric Power
关键词
锅炉烟气
湿法脱硫
旋流
雾化
节能
title gas
wet flue gas desulfurization （WFGD）
swirl
atomization
energy saving
