Zero discharge technology of flue gas evaporation and crystallization desulfurization wastewater in an ultra-supercritial 660 MW unit

HE Jiwang; LI Tao; DANG Xiaojian; WANG Hongyu

doi:10.19666/j.rlfd.201807125

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Zero discharge technology of flue gas evaporation and crystallization desulfurization wastewater in an ultra-supercritial 660 MW unit

Thermal Power Generation Vol. 48, Issue 1, Pages: 110-114(2019)

更新时间：2025-09-28

- Zero discharge technology of flue gas evaporation and crystallization desulfurization wastewater in an ultra-supercritial 660 MW unit
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201807125
  CLC： TM628
- Published Online：05 January 2019，
  
  Published：2019
- 稿件说明：
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HE Jiwang, LI Tao, DANG Xiaojian, et al. Zero discharge technology of flue gas evaporation and crystallization desulfurization wastewater in an ultra-supercritial 660 MW unit[J]. Thermal Power Generation, 2019, 48(1): 110-114.
DOI：

HE Jiwang, LI Tao, DANG Xiaojian, et al. Zero discharge technology of flue gas evaporation and crystallization desulfurization wastewater in an ultra-supercritial 660 MW unit[J]. Thermal Power Generation, 2019, 48(1): 110-114. DOI： 10.19666/j.rlfd.201807125.

摘要

介绍了华能某发电公司新建超超临界660 MW机组烟道(主烟道和旁路烟道)蒸发结晶脱硫废水零排放技术的工艺流程、控制策略

调试期间现场试验研究了投运该零排放技术前后

空气预热器(空预器)参数、一级省煤器后给水温度、低温省煤器参数和机组主参数的变化

分析了该脱硫废水零排放系统对电除尘、脱硫水耗、输灰流动性和灰品质的影响。结果表明:该烟道蒸发结晶脱硫废水零排放技术对一级省煤器后给水温度、热一、二次风温、空预器出口排烟温度和灰品质均有一定影响

但影响较小;有利于提高电除尘效率

烟道蒸发结晶脱硫废水零排放技术安全、节能、高效

具有推广应用价值。

Abstract

For the desulfurization wastewater zero discharge technology of evaporation and crystallization in flue gas in main flue duct and bypass of a newly built ultra-supercritial 660 MW unit belonging to Huaneng Group Co.

Ltd.

the technological process and control strategy of this technology are depicted at first. Then

the changes of parameters with the operating of zero discharge technology

including air preheater

feed water after the primary economizer

low-temperature economizer and the main steam

are studied by tests during the commissioning. The effect of this desulfurization waste water zero discharge system on the electric precipitator

water consumption of desulfurization system

liquidity and quality of coal ash are analyzed finally. The results show that

this technology has limited effect on temperature of the feed water behind the primary economizer

flue gas at outlet of the air preheater

hot primary and second wind

as well as the quality of coal ash. Therefore

this zero discharge technology is of extensive value and worthy of promotion with the advantages of safety

energy conservation and high efficiency.

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