Design and operation characteristics of limestone-gypsum desulfurization double-tower series system

YU Zhao; HE Yudong; LI Xinghua; CAO Chenjun

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Design and operation characteristics of limestone-gypsum desulfurization double-tower series system

更新时间：2025-09-28

- Design and operation characteristics of limestone-gypsum desulfurization double-tower series system
- Thermal Power Generation Issue 1, (2016)
- 作者机构：
  
  1. 西安热工研究院有限公司,陕西,西安,710032
  2. 华能铜川照金电厂,陕西,铜川,727100
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published Online：15 February 2016，
  
  Published：2016
- 稿件说明：
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YU Zhao, HE Yudong, LI Xinghua, et al. Design and operation characteristics of limestone-gypsum desulfurization double-tower series system[J]. Thermal power generation, 2016, (1).
DOI：

YU Zhao, HE Yudong, LI Xinghua, et al. Design and operation characteristics of limestone-gypsum desulfurization double-tower series system[J]. Thermal power generation, 2016, (1). DOI：

摘要

燃用高硫煤的机组

采用单塔脱硫系统时的脱硫效率仅为90％～95％。为满足烟气排放的新标准

石灰石-石膏法串联脱硫塔系统逐渐被采用。本文介绍了石灰石-石膏法脱硫技术的发展历程以及串联脱硫塔系统与单脱硫塔的不同，分析了pH值、一级塔效率、烟气流速、液气比和浆池容积等因素对串联脱硫塔系统设计与运行的影响。同时提出以下建议：对于燃用高硫煤锅炉的脱硫系统一级塔的脱硫效率宜取70％～80％

对于燃用中高硫煤锅炉的脱硫系统一级塔的脱硫效率宜取80％～90％；一级塔烟气流速取4.0～4.5 m/s

二级塔烟气流速应低于3.6 m/s；一、二级脱硫塔液气比的选择要考虑到低pH值的影响，其中二级塔的液气比取5～10 L/m3较经济合理。

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