Treatment of desulfurization wastewater with TMT and performance analysis on the precipitates

LIAO Dongmei; WANG Zhengjiang; GUO Jingdong; WANG Xiaowei; CHEN Zhigang

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Treatment of desulfurization wastewater with TMT and performance analysis on the precipitates

Thermal Power Generation Vol. 45, Issue 9, Pages: 122-127(2016)

更新时间：2025-09-28

- Treatment of desulfurization wastewater with TMT and performance analysis on the precipitates
- 作者机构：
  
  1. 武汉大学动力与机械学院
  2. 西安热工研究院有限公司
  3. 华能海口电厂
  4. 武汉中伟化工科技有限责任公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X703
- Published：2016
- 稿件说明：
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LIAO Dongmei, WANG Zhengjiang, GUO Jingdong, et al. Treatment of desulfurization wastewater with TMT and performance analysis on the precipitates[J]. Thermal Power Generation, 2016, 45(9): 122-127.
DOI：

LIAO Dongmei, WANG Zhengjiang, GUO Jingdong, et al. Treatment of desulfurization wastewater with TMT and performance analysis on the precipitates[J]. Thermal Power Generation, 2016, 45(9): 122-127. DOI：

摘要

针对湿法脱硫废水的特点

研究了三巯基均三嗪三钠盐(TMT)去除重金属的原理与工艺流程。合成并表征了镉、铅等金属TMT沉淀物;采用电厂实际脱硫废水制备了以金属TMT混合沉淀物为主的脱硫废水泥渣。用等离子发射光谱仪、热重分析仪和X射线衍射等对金属TMT沉淀物的浸出毒性和热稳定性作了初步研究。结果表明:TMT能与多种重金属离子强力结合;产生的金属TMT沉淀物在硫酸硝酸、纯水中的浸出毒性低

可作为第Ⅰ类一般工业固体废物直接填埋;金属TMT沉淀物的热稳定性较高

在250~300℃左右开始分解

730~740℃时结束

分解产物为相应的硫化物。研究结果对选择脱硫废水泥渣的处置方式有指导意义。

Abstract

On the basis of the properties of the flue gas desulfurization(FGD)wastewater

the principle and process flow of wastewater treatment with the environment-friendly reagent TMT were investigated.The Cd/Pb/Ni/Cu/Zn-TMT were synthetized and characterized by elemental analysis and IR.The sludge made of the metal-TMT precipitates was prepared by the FGD wastewater from a coal-fired power plant.The leaching toxicity and thermal stability of the metal-TMT precipitates were studied by ICP-AES

TG and XRD.The results show that

the TMT is a very advantageous chelating agent in precipitating metal ions.The metal-TMT precipitates can enter the landfill as the first kind of general industrial solid wastes because of the low leachability in H_2SO_4-HNO_3 agent and pure water.The metal-TMT precipitates have high thermal stability

they start decomposition at temperatures from 250 ℃ to 300 ℃ and ends at 730 ℃ to740 ℃.The breakdown products are the corresponding sulfides.The results are significant for the post disposal of FGD wastewater sludge.

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