过热器腐蚀问题与有效防范措施

针对某生物质发电厂链条炉排高温高压锅炉过热器发生的腐蚀现象,在分析腐蚀产物、腐蚀机理的基础上,从设计、运行与燃料管理3个角度提出可行的预防腐蚀的防范措施。

碱回收锅炉过热器腐蚀的方式

浅谈碱回收锅炉在运行中过热器出现的几种腐蚀方式及预防措施。

垃圾焚烧电厂过热器管腐蚀泄漏机制研究

本文主要结合垃圾的成分特性,利用多种分析测试手段对发生腐蚀部位的成分和结构进行分析,从而判断腐蚀发生的机理过程。总体而言,过热器管壁发生腐蚀的情况主要与气相氯和碱金属腐蚀有关,通过本文分析可以进行针对性的防腐蚀措施的控制,提升电厂设备的稳定运行。

Corrosion Behavior of TP316L of Superheater in Biomass Boiler with Simulated Atmosphere and Deposit

Corrosion behavior of TP316L was investigated with simulated atmosphere and ash deposition for the superheater in biomass boiler.Corrosion dynamic curves were plotted by mass gain.The results showed that the corrosion was dependent on temperature and was greatly accelerated by ash deposition.The mass gain was distinctly reduced in the presence of SO2 with and without ash deposition on the specimens.Corrosion rates with ash deposit at different temperatures were calculated.Two feasible methods were provided to avoid serious high-temperature corrosion in the biomass boiler.

城镇生活垃圾焚烧炉受热面积灰对换热器温度场的影响及改进分析

本文以某350 t·d^(-1)垃圾焚烧炉为研究对象,采用数值模拟方法,分析一级蒸发器下部集箱积灰对蒸发器以及高温过热器周围温度与流场分布的影响;并提出将一级蒸发器前两排管改造至第三烟道处,优化烟气流场分布和受热面的换热特性。结果表明:蒸发器管道下部集箱积灰对高温过热器烟气走廊处流场和温度分布存在明显影响,管道积灰不仅增加灰垢热阻,降低了其自身换热能力,热负荷向后偏移;且导致周界烟气温度升高。排管优化改造后,一级蒸发器的积灰影响减弱,流场趋于正常,高温过热器烟气走廊处的流场流速和温度有明显下降,高温过热器烟气走廊处的绕流减少且整体换热特性有明显提升,降低了高温过热器高温腐蚀风险,对实际运行起到改善作用。