| 面向物质资源化的燃煤电厂脱硫废水零排放工艺研究 |
| |
| 引用本文： | 徐敏,杜洪宇,郭家明,赵晓丹,卢卫,孙超,陈宇,周振.面向物质资源化的燃煤电厂脱硫废水零排放工艺研究[J].环境工程,2022,40(10):169-175. |
| |
| 作者姓名： | 徐敏 杜洪宇 郭家明 赵晓丹 卢卫 孙超 陈宇 周振 |
| |
| 作者单位： | 1. 华能国际电力江苏能源开发有限公司 南通电厂, 江苏 南通 226003; |
| |
| 基金项目： | 上海市教委曙光计划(19SG49)华能南通电厂污泥、固废特性分析与污泥资源化关键技术研究(HNKJ19-G02)国家自然科学基金项目(51878403) |
| |
| 摘 要： | 基于水质特性分析,以物质资源化为核心,构建了脱硫废水强化递级分盐预处理-膜浓缩电解制氯零排放工艺,并进行了35 d的中试试验(500 L/d)。结果表明:该工艺能够在稳定运行的基础上实现污染物的高效去除和物质的充分资源化。预处理模块出水SS、Mg2+、SO2-4和Ca2+去除率分别为100%、96.6%、99.8%和98.9%;各处理单元沉淀物分别为CaSO4、Mg(OH)2、钙矾石和CaCO3,其纯度可分别达到86.9%、99.8%、88.3%和99.9%,可作为脱硫石膏、除磷剂、阻燃剂和脱硫剂进行资源化利用;膜浓缩电解制氯模块所得次氯酸钠符合GB 19106-2013《次氯酸钠》中A型Ⅲ级要求,可用于消毒、杀菌与水处理。
|
| 关 键 词： | 脱硫废水 零排放 递级分盐 资源化 电解制氯 |
| 收稿时间： | 2021-08-06 |
A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS |
| |
| Affiliation: | 1. Nantong Power Plant, Huaneng International Power Jiangsu Energy Development Co., Ltd, Nantong 226003, China;2. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China |
| |
| Abstract: | Based on characteristics of wastewater and resource recovery, a zero liquid discharge process of flue gas desulfurization wastewater, combined with graded salt separation pretreatment, membrane concentration and electrolytic chlorine production unit, was constructed. A pilot-scale experiment was conducted for 35 d at a flow rate of 500 L/d. The results suggested that effective removal of pollutants and resource recovery could be achieved with suspended solid, Mg2+, SO2-4 and Ca2+ removal of 100%, 96.6%, 99.8% and 98.9%. The purity of CaSO4, Mg(OH)2, ettringite and CaCO3 precipitate were 86.9%, 99.8%, 88.3% and 99.9%, which were suitable to be utilized as desulfurization gypsum, dephosphorization agent, flame retardant and desulfurizer. NaClO obtained from electrolytic chlorine production could satisfy the requirement of type A, class Ⅲ in China's National Standard GB 19106-2013, which was applicable to disinfection, sterilization and water treatment. |
| |
| Keywords: | |
|
| 点击此处可从《环境工程》浏览原始摘要信息 |
|
点击此处可从《环境工程》下载全文 |
|
