Waste tyre rubber as a secondary fuel for power plants

Waste tyre rubber as a secondary fuel for power plants
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废轮胎橡胶作为发电厂的二次燃料

DOI:
10.1016/j.fuel.2009.02.026
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发表时间:
2009
期刊:
影响因子:
7.4
通讯作者:
Singh S
Singh S
中科院分区:
工程技术1区
文献类型:
--
作者:
Singh S

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全世界每年大约产生10亿个废轮胎,其中美国产生3亿个,欧盟产生2.6亿个,这代表了一个巨大的废物管理问题。与此同时,发电厂的排放控制指标也越来越严格。发展洁净煤燃烧的科学和技术对于依赖各种能源生产系统的可持续环境至关重要。在这个中试规模的研究中,我们已经表明,轮胎橡胶可以与煤粉一起燃烧,并且可能在全面规模的发电厂锅炉的共烧配置中发挥作用,因为废物开始在减少二氧化碳的“燃料转换”方案中发挥作用。在燃煤厂利用废轮胎可以一步减少氮氧化物排放,并有效地从废轮胎中回收能源。因此,通过这个过程,一个问题废物流被有效地利用,以帮助解决一个重大的环境污染问题。我们提出的数据显示再燃烧和共烧配置利用废轮胎橡胶。当使用挥发性较低的南非煤作为主要燃料时,可以实现低水平的NO排放(在再燃烧燃料馏分<12%时减少高达80%)。将轮胎再燃烧的结果与一套不同挥发性烃含量的再燃烧燃料的性能进行了比较。轮胎与煤直接共烧也可以降低NO水平,但降低的程度取决于煤的反应性和混合燃料火焰主要区域的普遍燃烧条件。
Approximately 1 billion waste tyres are generated worldwide each year, with the US producing 300 million and the EU 260 million tyres, representing an enormous waste management problem. At the same time, increasingly stringent emission control targets are being imposed on electric power generating plants. The development of science and technology for clean coal combustion is crucial for a sustainable environment which is dependent on a mix of energy production systems. In this pilot scale study we have shown that tyre rubber can be fired with pulverised coal and may have a role to play in co-firing configurations in full scale power plant boilers as wastes are beginning to feature in ‘fuel switching’ scenarios for CO2mitigation. Utilisation of waste tyres in a coal combustion plant can, in one step, reduce NO emissions and recover energy from waste tyres, efficiently. Therefore, through this process, a problem waste stream is effectively utilised to help solve a major environmental pollution problem. We present data demonstrating reburning and co-firing configurations utilising waste tyre rubber. Low levels of NO emission (up to 80% reduction at reburning fuel fractions <12%th) can be achieved, when using a lower volatile South African coal as the primary fuel. The results for tyre reburning are compared with the performance of a suite of reburning fuels with differing volatile hydrocarbon contents. Direct co-firing of tyre with coal can also reduce NO levels but the degree of reduction is dependent on the reactivity of the coal and the prevailing combustion conditions in the primary zone of the mixed fuel flame.
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