Measures for reducing station auxiliary power rate of WFGD system in a supercritical coal-fired unit

XU Peng; YAN Jianwen; WU Shun

doi:10.19666/j.rlfd.202104061

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Measures for reducing station auxiliary power rate of WFGD system in a supercritical coal-fired unit

更新时间：2025-09-28

- Measures for reducing station auxiliary power rate of WFGD system in a supercritical coal-fired unit
- Thermal Power Generation Vol. 50, Issue 11, Pages: 165-169(2021)
- 作者机构：
  
  江西赣能股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202104061
  CLC： X773
- Published：2021
- 稿件说明：
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XU Peng, YAN Jianwen, WU Shun. Measures for reducing station auxiliary power rate of WFGD system in a supercritical coal-fired unit[J]. Thermal power generation, 2021, 50(11): 165-169.
DOI：

XU Peng, YAN Jianwen, WU Shun. Measures for reducing station auxiliary power rate of WFGD system in a supercritical coal-fired unit[J]. Thermal power generation, 2021, 50(11): 165-169. DOI： 10.19666/j.rlfd.202104061.

摘要

介绍了脱硫系统的设计特点、运行情况及优化方案。对某电厂700 MW燃煤机组湿法烟气脱硫系统厂用电率主要影响因素

包括耗电设备、入炉煤含硫量、脱硫效率、脱硫系统运行方式、石灰石品质等进行分析

试验确定了脱硫系统降低厂用电率具体措施:调整2台锅炉的配煤方式;确定了不同负荷下脱硫效率及循环浆液泵最佳运行组合

将单台锅炉脱硫系统中循环浆液泵运行数量由原来的3～5台调整为2台;对吸收塔浆液喷嘴及支管进行清理疏通

降低循环浆液泵运行出口压力

有效提高了脱硫系统运行液气比

满负荷情况下吸收塔适应含硫量由0.87%提升到1.24%。优化措施实施后

全厂脱硫系统厂用电率从1.038%降至0.733%

脱硫系统运行经济性得到了改善。

Abstract

The design characteristics

operation situation and optimization scheme of the desulfurization system are introduced. Taking the wet flue gas desulfurization(WFGD) system of a 700 MW coal-fired unit as an example

the main factors affecting the station auxiliary power rate

including the power consumption equipment

sulfur content in the coal

desulfurization efficiency

desulfurization system operation mode

limestone quality

and so on

are analyzed. The specific measures to reduce the station auxiliary power rate of desulfurization system are determined

namely

adjusting the coal distribution mode of two boilers

determining the desulfurization efficiency and optimal operation combination of circulating slurry pump at different loads

adjusting the number of circulating slurry pump in a single boiler desulfurization system from 3～5 to 2

and clearing the slurry nozzle and branch nozzle of absorption tower

reducing the pressure at the circulating slurry pump outlet. After these measures were implimented

the liquid/gas ratio of the desulfurization system was effectively improved

the sulfur capacity of the absorption tower increased from 0.87% to 1.24% at full load

and the station auxiliary power rate of the WFGD system reduced from 1.038% to 0.733%. The operation economy of the WFGD system was improved.

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