生活垃圾焚烧炉烟气脱酸——“半干法 - 干法”组合工艺的特征研究

洪权 周(上海环境卫生工程设计院有限公司，中国;同济大学热能与环境工程研究所，中国;)

摘要

生活垃圾焚烧炉烟气中的SO2和HCl排放，可以通过“半干法-干法”组合工艺来进行脱除。本文对某500t/d焚烧炉，进行了烟道中不同位置的酸性气体浓度测试和飞灰组成测试，来展现该组合工艺的技术特征。主要实验结论有：用化学法烟气取样、配合离子色谱测试，可以有效测试高水分烟气中的SO2和HCl浓度。焚烧炉烟气中富含O2和水分，会引起半干法塔内脱酸倾向生成CaSO4, 而抑制CaCl2的生成，且飞灰中生成的氯盐主要是NaCl和KCl。组合工艺展现了“先半干法塔主要脱SO2，后干法技术侧重脱HCl”的先后步骤特征，研究结论对后续开展脱酸技术的优化与升级，有一定的基础实验数据的参考价值。

关键词

垃圾焚烧；SO2；HCl；飞灰；半干法-干法组合工艺

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DOI: http://dx.doi.org/10.12345/gcjsygl.v9i14.30486