脱硫装置脱硫效率影响因素分析.doc

脱硫装置脱硫效率影响因素分析.doc: .
脱硫装置脱硫效率影响因素分析*
张宽友
中电投远达环保工程有限公司，重庆市401122
Influencing Factor Analysis for Desulphurization Efficiency of
a 360MW Power Plant
Zhang Kuanyou
Jjnyu Rd. Chongqing North Zone Chongqing China, 401122
国家科技支撑计划资助(2007BAC24B00)
ABSTRACT: The desulphurization efficiency of FGD plant of a certain power plant descended after near ten-years operation, which was mainly caused by changes of design coal. Through technical retrofit, the efficiency has been improved and reached 93%〜95%. This thesis focused on analyzing the main influencing factors of the desulphurization efficiency: power of generator, oxidation air, absorber liquid level, slurry pH value, flue gas temperature, nozzle verticality etc.. Measures to improve defoam in slurry tank and to add the absorber internals for improving G/L mass transfer were suggested for increasing the desulphurization efficiency further.
KEY WORDS: Desulphurization Efficiency; Influencing Factor; Analysis
摘要：某电厂脱硫装置运行近十年后，脱硫效率下降， 主要为设计煤种改变所致，经过技改后脱硫效率有所提 高，达到93%~95%。本文就影响脱硫效率的主要因素： 发电机功率、氧化空气、吸收塔液位、浆液pH值、烟 气温度、喷嘴垂直度等进行分析，建议采取改善浆液池 切泡、增加塔内构件改善气液传质等措施进一步提高脱 硫效率。
关键词：脱硫效率；影响因素；分析
1概述
某2X360MW燃煤机组脱硫装置采用 石灰石湿法脱硫液柱塔技术，-炉一塔配 置，单台脱硫装置设计处理能力为对应机组 锅炉烟气量的85% ,即烟气量 915500m3N/H(w), SO2 3 500ppm(w)，烟气温 度142°C, FGD脱硫效率不低于95%。
图1原装置设计系统图
原装置工艺流程如下：锅炉引风机后的烟气 经换热器降温后进入顺流塔预