Application and comparison of'zero discharge'technology for desulfurization waste water

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Application and comparison of'zero discharge'technology for desulfurization waste water

更新时间：2025-09-28

- Application and comparison of'zero discharge'technology for desulfurization waste water
- Thermal Power Generation Vol. 43, Issue 12, Pages: 114-117(2014)
- 作者机构：
  
  神华国华(北京)电力研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2014
- 稿件说明：
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LIU Qiusheng. Application and comparison of'zero discharge'technology for desulfurization waste water[J]. Thermal power generation, 2014, 43(12): 114-117.
DOI：

LIU Qiusheng. Application and comparison of'zero discharge'technology for desulfurization waste water[J]. Thermal power generation, 2014, 43(12): 114-117. DOI：

摘要

燃煤电厂烟气脱硫废水具有高含盐量、成分复杂、腐蚀性和结垢性的特征

回用困难

成为制约电厂废水"零排放"实现的关键因素之一。介绍了脱硫废水的排放特征及回用现状

并对国内已投运的2种脱硫废水"零排放"方案的技术与经济性进行了分析比较。结果表明:机械蒸汽压缩技术较多效蒸发技术可以显著降低运行能耗;在蒸发系统前设置水质软化系统

能显著降低蒸发系统的结垢倾向

提高系统运行可靠性和稳定性。因此

建议脱硫废水"零排放"技术采用预处理系统(石灰和碳酸钠两级澄清软化+过滤处理)+蒸发浓缩系统(MVR/MVC)工艺。

Abstract

Due to such features as high salt content

complicated composition and corrosive character

the desulfurization waste water in coal-fired power plant is hard to reuse.This has become the bottleneck to achieve'zero discharge'for the power plant.On the basis of analyzing emission characteristics and reuse status of the desulfurization waste water

two'zero discharge'technologies serving for two power plants separately had been compared.The results indicate that

compared to the multiple-effect distillation(MED)method

the mechanical vapor recompression(MVC)technology can save energy significantly.In addition

the water softening equipment installed before the evaporation facility can suppress the scale formation

improve the operational reliability and stability.Therefore

a combined technology

including pretreatment system(such as defeco-carbonation process or filtration)and evaporation system(such as MVR or MVC)

is suggested to treat the desulfurization waste water to achieve'zero discharge'.

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