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Combustion of solid fuel in a hybrid porous reactor

机译：固体燃料在杂交多孔反应器中的燃烧

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One of the most significant human-made methane emission sources is the municipal solid waste (MSW), deposited on sanitary landfills and open dumps [1,2].Within this work, an alternative MSW treatment concept is presented, which could provide a relatively clean waste/biomass-to-energy transformation. The proposed procedure comprises of a combustionand agasification (or pyrolysis) step, which are consecutively taking placein atwo-stage hybrid porous reactor system. The core of the system are two packed bed reactors, in which solid fuel (waste or biomass) is mixed with inert ceramic particles of similar size. This paper overviews the initial experimental investigation of the combustion stepof a hybrid mixture, composed of wood pellets (fuel) and alumina balls (inert ceramic particles) in a 250 mm-high batch reactor. The temperature profile along the reactor, the concentration of CO and the flame front propagation velocity were measured as a function of the ceramic particlesize (11 and 20 mm), the inert-to-fuel mass ratio (0:1, 2:1, 3:1) and the airflow rate (30, 42, 60 1/min). Experiments indicate that an increase of the mass ratio of inert-to-fuel material and a decrease of the inert ceramic particles size lead to a decrease of the maximum temperatureof the packed hybrid bed. Measured CO concentrations showed strong dependence on the inert ceramic particle size, i.e. the particle size reduction from 20 to 11 mm resulted in a significant reduction of CO-emission peaks. The maximum flame front propagation velocityof 0.2 mm/sec was detected for the airflow of 42 1/min, the particle size of 20 mm and the mass ratio of 3:1.
机译：最重要的人造甲烷排放来源之一是市政固体废物（MSW），沉积在卫生垃圾填埋场和开放式倾卸[1,2]。在这项工作中，提出了另一种备用MSW治疗理念，可以提供相对的清洁废物/生物质 - 能量变换。所提出的方法包括燃烧和嗜氨酸化（或热解）步骤，其连续采用ATWO-阶段杂化多孔反应器系统。该系统的核心是两个填充床反应器，其中固体燃料（废物或生物质）与惰性陶瓷颗粒相似的相似尺寸。本文概述了由250mM高批量反应器中的木质粒料（燃料）和氧化铝球（惰性陶瓷颗粒）组成的杂交混合物的初始试验研究。沿反应器的温度曲线，CO的浓度和火焰前传播速度作为陶瓷颗粒化（11和20mm），惰性至燃料质量比（0：1,2：1， 3：1）和气流速率（30,42,601 / min）。实验表明，惰性至燃料材料的质量比和惰性陶瓷颗粒尺寸的降低的增加导致填充杂交床的最大温度降低。测量的CO浓度显示对惰性陶瓷粒度的强依赖性，即粒径从20-11mm降低导致共发射峰的显着降低。检测到0.2mm /秒的最大火焰前传播速度为42 1 / min，粒径为20mm，质量比为3：1。

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