燃用高硫煤火电机组旋流雾化超洁净排放试验研究  

Experimental study on ultra-low emission of high-sulfur coal combustion in thermal unit by swirl atomization

作　　者：刘定平[1] 马佩佩 周俊 LIU Dingping;MA Peipei;ZHOU Jun(School of Electric Power,South China University of Technology,Guangzhou 510640,China;Guangdong Essen Environmental Technology Co.,Ltd.,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东埃森环保科技有限公司,广东广州510640

出　　处：《洁净煤技术》2018年第6期101-106,共6页Clean Coal Technology

基　　金：国家自然科学基金资助项目(51576072);广州市科技计划资助项目(201604020130)

摘　　要：针对脱硫塔直径小、烟气流速高,燃用高硫煤时烟气脱硫除尘难以超洁净排放的难题,以某300 MW火力发电机组为例,采用旋流雾化脱硫除尘一体化技术进行改造,研究液气比、入口烟气温度对脱硫效率和除尘效率的影响。结果表明,采用旋流雾化脱硫除尘一体化技术,脱硫塔入口粉尘浓度为30 mg/Nm^3时,脱硫塔出口粉尘浓度实现小于5 mg/Nm^3的超洁净排放要求,不需在脱硫塔后加装湿电除尘器,即可在脱硫单塔协同完成脱硫除尘。在一定液气比下,烟气入口温度及SO2浓度对脱硫塔的效率影响不大,脱硫效率稳定在99. 29%以上,脱硫塔除尘效率高达90. 84%,旋流雾化脱硫除尘一体化技术具有较好的工况适应性和系统稳定性。Due to small diameter of desulfurization tower and high flow rate of flue gas,the flue gas desulfurization and de-dusting are difficult to achieve ultra-low emission.Taking a 300 MW thermal power generating unit as example,the swirling atomization desulphurization and de-dusting integrated technology was upgraded to study the effects of liquid-gas ratio and inlet flue gas temperature on desulfurization efficiency and dust removal efficiency.The results show that the dust concentration of inlet and outlet in desulfurization tower are 30 mg/Nm^3 and less than 5 mg/Nm^3 ,respectively with the swirling atomization desulphurization and de-dusting integrated technology,and desulfurization and de-dusting can complete in the single desulfurization tower without humidification.At a certain liquid-gas ratio,the flue gas inlet temperature and SO2 concentration have little effect on the efficiency of desulfurization tower,the desulfurization efficiency can be stabilized above 99.29%,and the desulfurization tower dust removal efficiency is as high as 90.84%,indicating the swirling atomization desulphurization and de-dusting integrated technology has good adaptability and system stability.

关 键 词：烟气超低排放 高硫煤 脱硫除尘一体化 旋流雾化 

分 类 号：X773[环境科学与工程—环境工程]