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Fouling and Its Mitigation in PC Boilers Co-Firing Forestry and Agricultural Biomass

机译：林业和农业生物质同时燃烧的燃煤锅炉污垢及其缓解

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摘要

This paper presents a study of the fouling properties of solid fuels based on analyses of ashes from hard coal, forestry biomass, and agricultural biomass, ash deposits collected directly from the boiler surfaces, and ash deposits collected from a deposition probe. All samples were collected in the area of the steam superheater/reheater of a OP 380 pulverized-coal boiler co-firing forestry and agricultural biomass. In addition, the study concerns mitigation of unwanted fouling through application of a silica-based fireside additive. An analysis was carried out to obtain the following information: physical and chemical properties of ash produced during co-firing of a biomass mixture (50 wt.% forestry/50 wt.% agricultural biomass) and coal in order to determine its propensity for fouling and slagging without the use of a fireside additive; slagging/fouling indices during co-firing of a biomass mixture (50 wt.% forestry/50 wt.% agricultural biomass) and coal with the use of a fireside additive; and slagging/fouling indices during co-firing of pure agricultural biomass (sunflower husk) and coal with the use of a fireside additive. The mass flow of co-fired biomass fuel supplied to the boiler during reference measurements and mass flow when the additive was fed were the same and amounted to 33 wt.% of the total fuel mass flow. Finally, the effectiveness of fouling mitigation is determined by comparing the results of the deposition rate obtained with the use of a deposition probe for all three cases of co-firing.
机译：本文基于硬煤，林业生物量和农业生物量的灰分，直接从锅炉表面收集的灰渣和通过沉积探针收集的灰渣的分析，对固体燃料的结垢特性进行了研究。所有样品均收集在OP 380煤粉锅炉的蒸汽过热器/再热器区域，该锅炉将林业和农业生物质同时燃烧。此外，该研究还涉及通过使用基于二氧化硅的炉膛添加剂来减轻有害污垢。进行分析以获得以下信息：在生物质混合物（50 wt。％林业/ 50 wt。％农业生物质）和煤的共烧过程中产生的灰分的物理和化学性质，以确定其结垢的倾向不使用火边添加剂的排渣；使用火边添加剂共烧生物量混合物（50 wt。％林业/ 50 wt。％农业生物量）和煤炭时的结渣/结垢指数；和纯净的农业生物质（向日葵皮）和煤炭使用炉边添加剂共烧时的结渣/结垢指数。在参考测量期间供应到锅炉的共燃生物质燃料的质量流量与进料添加剂时的质量流量相同，并占总燃料质量流量的33 wt。％。最后，通过比较在所有三种共烧情况下使用沉积探针获得的沉积速率结果，来确定减轻结垢的有效性。

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  • 来源
    《Heat Transfer Engineering》 |2015年第8期|763-770|共8页
  • 作者

    SYLWESTER KALISZ; SZYMON CIUKAJ; MATEUSZ TYMOSZUK; HENRYK KUBICZEK;

  • 作者单位

    Silesian University of Technology, Konarskiego 20, 44-100 Gliwice, Poland;

    Silesian University of Technology, Gliwice, Poland;

    Silesian University of Technology, Gliwice, Poland;

    EDF Polska S.A., Krakow, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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