Research progress of charcoal production

doi:10.16085/j.issn.1000-6613.2015.08.015

Abstract

Abstract: Cooling seawater is used generally in petrochemical industry, power generation and shipping, however crystallization fouling of seawater would deteriorate heat transfer and increase energy consumption. The experiments of crystallization-fouling by seawater were conducted under static condition. The crystallization fouling composition was analyzed by XRD, and the results showed that seawater fouling was CaSO₄·2H₂O and Mg(OH)₂. A crystallization-fouling growth model was proposed as m=ke^-bt+M₀, and the experimental data of different roughness metal at 80℃ was fitted to the correlation with maximum relative error of 15.7%. The crystallization-fouling correlation and the growth curve showed that induction period, growth rate and mass of seawater crystallization-fouling were closely related to fouling-ions properties, super-saturation and metal surface roughness. When roughness of metal decreased, induction period of crystallization fouling became longer and grown rate became lower.

Key words: charcoal, carbonization technology, production equipments, biomass, pyrolysis, renewable energy

摘要： 木炭作为一种重要的生产、生活原料,在工业生产和家庭生活中应用广泛。现有的木炭生产技术主要有内热式炭化、外热式炭化和循环气流加热式炭化技术,本文概述了3种炭化技术与设备的研发现状,并总结了炭化工艺改进的理论研究进展:长低温停留时间,然后快速升温到高温段保温的加热工艺有利于提高木炭产率和品质,同时节省炭化时间和能量;适当提高原料湿度和炭化压力将促进木材热解,增大压力还能提高木炭得率;减小原料尺寸可以提升炭化速率,但会使得炭得率降低。最后指出当前国内木炭生产主要存在工业化水平低、理论研究滞后和缺乏相关的生产使用标准等问题,未来的木炭生产将沿着工业化、高效化和标准化方向发展。

关键词: 木炭, 炭化工艺, 生产设备, 生物质, 热解, 再生能源

CLC Number:

HUANG Bolin, CHEN Xiaoge, ZHANG Yikun, ZHENG Yijun, LIU Baoqing. Research progress of charcoal production[J]. Chemical Industry and Engineering Progree, 2015, 34(08): 3003-3008.

黄博林, 陈小阁, 张义堃, 郑毅骏, 刘宝庆. 木炭生产技术研究进展[J]. 化工进展, 2015, 34(08): 3003-3008.

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