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Fine particle collection of an electrostatic precipitator in CO_2-rich gas conditions for oxy-fuel combustion

机译:富氧气体条件下用于氧气燃料燃烧的静电除尘器的细颗粒收集

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摘要

The collection of particles in CO_2-enriched environments has long been important for the capture of CO_2 in order to clean gases via oxy-fuel combustion. We here report on the collection characteristics of fine and ultrafine particles using an electrostatic precipitator (ESP) in a CO_2-enriched atmosphere. In order to understand the characteristics of particle collection in CO_2-rich gas mixtures, the ionic properties of a CO_2-enriched atmosphere was also investigated. The electrical mobility of the ions in a CO_2-enriched atmosphere was found to be about 0.56 times that found in a conventional air atmosphere, due to the higher mass of CO_2 gas compared to that of air. The low electrical mobility of ions resulted in a low corona current under CO_2-enriched conditions. The collection efficiency of particles in a CO_2-rich atmosphere for a given power consumption was thus somewhat lower than that found in air, due to the low quantity of particle charging in CO_2-enriched air. At the same time, higher temperatures led to the higher electrical mobility of ions, which resulted in a greater collection efficiency for a given power. The presence of a negative corona also led to a greater collection efficiency of particles in an ESP than that achieved for a positive corona.
机译:长期以来,在富含CO_2的环境中收集颗粒对于捕获CO_2以便通过含氧燃料燃烧净化气体非常重要。我们在这里报告了在富含CO_2的气氛中使用静电除尘器(ESP)收集的细颗粒和超细颗粒的特征。为了了解富含CO_2的气体混合物中颗粒收集的特性,还研究了富含CO_2的气氛的离子性质。由于与空气相比,CO_2气体的质量更高,因此在富含CO_2的气氛中离子的电迁移率约为传统空气气氛的0.56倍。离子的低电迁移率导致在富含CO_2的条件下电晕电流较低。对于给定的功耗,在富含CO_2的气氛中颗粒的收集效率因此略低于空气中的收集效率,这是由于富含CO_2的空气中的颗粒电荷量较低。同时,较高的温度导致离子的较高的电迁移率,这导致给定功率下的收集效率更高。与正电晕相比,负电晕的存在还导致ESP中颗粒的收集效率更高。

著录项

  • 来源
    《Science of the total environment》 |2010年第21期|p.5158-5164|共7页
  • 作者单位

    Environment and Energy Systems Research Division, Korea Institute of Machinery and Materials, 104 Sinseongno, Yuseong-gu, Daejeon, 305-343, Republic of Korea;

    rnEnvironment and Energy Systems Research Division, Korea Institute of Machinery and Materials, 104 Sinseongno, Yuseong-gu, Daejeon, 305-343, Republic of Korea;

    rnEnvironment and Energy Systems Research Division, Korea Institute of Machinery and Materials, 104 Sinseongno, Yuseong-gu, Daejeon, 305-343, Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    submicron; aerosol; electrostatic precipitator (ESP); carbon dioxide (CO_2); oxy-fuel;

    机译:亚微米气雾剂;静电除尘器(ESP);二氧化碳(CO_2);含氧燃料;
  • 入库时间 2022-08-17 13:56:24

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