Development of a probe for in-situ gasifier corrosion testing

Nexterra Systems Corp.是一家总部位于不列颠哥伦比亚省的加拿大公司，是垃圾气化能源领域的全球领先者 系统。Nexterra面临的持续挑战之一是气化炉锅炉系统的严重腐蚀。腐蚀在 气化炉锅炉受锅炉热侧气体成分和温度的影响。这个 成分和温度的组合会影响锅炉管子表面的盐析出速率，因为 以及发生的化学反应(和电化学反应)的性质。帮助它的设计和材料 根据规范程序，Nexterra需要样品架探头，以促进气化炉的就地腐蚀。 可以复制过热器中使用的材料所经历的热条件的测试。它 从以往的研究中观察到，风冷探头沿线存在温差 从一个样品到另一个样品。由于温度是评价各种材料耐腐蚀性的关键因素 对于合金，重要的是使探头表面温度既可控又均匀。拟议中的工作 旨在通过一种组合的数学方法开发一种温度可调的风冷探头 建模和工厂内测试。最终目标是开发一种温度可调的风冷样品保持器 Nexterra可以在其加拿大和其他地方的各种设施中实施的调查。

Nexterra Systems Corp. is a BC-based Canadian company and a global leader in waste-to-energy gasification systems. One of Nexterra's on-going challenges is severe corrosion in their gasifier boiler systems. Corrosion in gasifier boilers is influenced by the gas composition and temperature on the hot side of the boiler. The combination of composition and temperature will affect the rate of salt deposition on the boiler tube surface as well as the nature of the chemical (and electrochemical) reactions that occur. To aid in it's design and materials specification procedures, Nexterra is in need of a sample holder probe to facilitate in-situ gasifier corrosion testing that can duplicate the thermal conditions experienced by the materials employed in the superheater. It has been observed from previous studies that along the air-cooled probe there exist temperature differences from sample to sample. Since temperature is a key factor for evaluating the corrosion resistance of various alloys, it is important to make the probe surface temperature both controllable and uniform. The proposed work is aimed at developing a temperature-tuneable air-cooled probe through a combined approach of mathematical modeling and in-plant testing. The end goal is to develop a temperature tuneable air-cooled sample holder probe that Nexterra can implement at its various facilities in Canada and elsewhere.