固体废弃物焚烧过程中铬的释放及脱除研究  

Release and Removal of Chromium During Municipal Solid Waste Incineration

作　　者：吴沛东[1] 张军营[1] 赵永椿[1] 袁媛[1] 李小龙[1] 郑楚光[1] 

机构地区：[1]煤燃烧国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2014年第8期1238-1244,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51176060;41172140);国家重点基础研究发展计划项目(973计划)(2011CB201504)~~

摘　　要：固体废弃物焚烧中Cr的排放会危害环境。文中采用立式管式炉作为实验装置,通过模拟固体废弃物中添加定量不同形态含铬化合物,采用氧化铝、氧化钙、沸石和膨润土作为吸附剂,研究不同热力学条件、氯含量对固体废弃物焚烧过程中总Cr和Cr(VI)形态迁移转化及脱除效率的影响。结果表明温度的提高、停留时间的增加、氯含量的增加会促进总Cr和Cr(VI)的释放,O2和CaO会促进Cr(III)向Cr(VI)转化。对总铬的脱除效率:膨润土>沸石>氧化钙>氧化铝;对六价铬的脱除效率:氧化钙>沸石>膨润土>氧化铝。除氧化钙之外,温度对总Cr和Cr(VI)的脱除效率影响较小,氯会减弱吸附剂的脱除能力。Chromium released during municipal solid waste （MSW） incineration is highly toxic and carcinogenic. Effects of temperature, residue time and chlorine on release and removal of different forms of chromium during MSW incineration were investigated in a drop tube furnace. The results show that the higher temperature, more residue time and more chlorine increase the release of total chromium, 02 and CaO accelerate Cr（Ⅲ） transformation to Cr（Ⅵ）. The retention rate of the four sorbents for total-Cr follows the sequence of bentonite 〉 zeolite 〉 CaO 〉 Al203, while the retention rate of the four sorbents for Cr（Ⅵ） follows the sequence of CaO 〉 zeolite 〉 bentonite 〉 A1203. The removal rate of the sorbent is also influenced by temperature and chlorine.

关 键 词：固体废弃物焚烧 铬 六价铬 释放 脱除 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]