高盐废水回用于脱硫系统对脱硫性能影响的实验研究  

Experimental Study on the Effects of High Brine Reuse in Desulphurization System on Desulfurization Performance

作　　者：马双忱[1] 李洋[1] 辜涛 龚春琴 何川 樊帅军 徐昉 MA Shuangchen;LI Yang;GU Tao;GONG Chunqin;HE Chuan;FAN Shuaijun;XU Fang(Department of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China;FuyangHuarun Power Co.,Ltd.,Fuyang,236000,Anhui Province,China)

机构地区：[1]华北电力大学环境科学与工程系,河北保定071003 [2]阜阳华润电力有限公司,安徽阜阳236000

出　　处：《动力工程学报》2022年第1期56-66,共11页Journal of Chinese Society of Power Engineering

摘　　要：针对脱硫系统废水零排放中高盐废水重复利用的问题,通过搭建小型实验台,研究高盐废水回用于脱硫系统对其脱硫效率、石膏品质、浆液黏度及石灰石活性等的影响规律。结果表明:在脱硫效率实验中,石灰石浆液中添加单盐分后,浆液对酸性气体SO_(2)的缓冲性能提高,pH波动范围更小,脱硫效率提高;在相同浓度下,钠盐促进SO_(2)吸收传质效果更明显,尤其是Na_(2)SO_(4);相比不加盐分的石膏晶体,增加单种盐分后脱硫石膏晶体的形貌品质更好;从黏度影响气液传质系数的角度出发,盐分中的镁盐对传质影响显著,应控制镁盐浓度低于1 mol/L;浆液中的盐分NaCl能够促进石灰石溶解,而MgCl_(2)、CaCl_(2)对石灰石的溶解具有抑制作用,且不同盐分对石灰石离解效果的影响差异较大。According to the reuse problem of high salt wastewater from zero discharge of desulfurization wastewater,a small-scale experimental platform was built to investigate the effects of reuse of high salt wastewater in the desulfurization system on its desulfurization performance,such as desulfurization efficiency,gypsum quality,slurry viscosity and limestone activity.Results show that in desulfurization efficiency experiments,the limestone slurry with salt added can improve the buffering performance of acid gas SO_(2),and the pH fluctuation range is smaller,which improves the desulfurization efficiency;the sodium salt can promote the SO_(2) absorption and mass transfer effect at the same concentration,especially for the divalent sodium salt Na_(2)SO_(4);the gypsum crystals with single salt addition have a better crystal morphology and quality than those without salt addition;from the perspective of the salt viscosity affecting the gas-liquid mass transfer,magnesium salt has a significant impact,so the magnesium salt concentration should be controlled below 1 mol/L;NaCl in slurry can promote the dissolution of limestone,while MgCl_(2) and CaCl_(2) have an inhibitory effect.Different salinities have different effects on limestone dissociation.

关 键 词：高盐废水 黏度 脱硫效率 石膏品质 石灰石活性 

分 类 号：X703[环境科学与工程—环境工程]