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过程工程学报 ›› 2015, Vol. 15 ›› Issue (3): 443-450.DOI: 10.12034/j.issn.1009-606X.215105CSTR: 32067.14.jproeng.215105

• 过程与工艺 • 上一篇    下一篇

煤拔头工艺中煤与生物质快速热解的气体产物分布

金会心 吴复忠 王洋 王眉龙   

  1. 贵州大学材料科学与冶金工程学院 东北大学国家环境保护生态重点实验室
  • 收稿日期:2015-01-13 修回日期:2015-03-05 出版日期:2015-06-20 发布日期:2015-06-20
  • 通讯作者: 金会心

Distributions of Gaseous Products from the Flash Pyrolysis of Coal and Biomass in Coal Topping Process

JIN Hui-xin WU Fu-zhong WANG Yang WANG Mei-long   

  1. School of Material and Metallurgy,Guizhou university Key Laboratory on Eco-Industry, Northeastern University College of Materials and Metallurge, Guizhou University College of Materials and Metallurge, Guizhou University
  • Received:2015-01-13 Revised:2015-03-05 Online:2015-06-20 Published:2015-06-20
  • Contact: JIN Hui-xin

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被引次数

2

摘要： 在模拟煤拔头快速热解条件下，实验研究了煤、生物质及其混合物热解产物的产率、气体组成及气体热值随热解温度的变化规律. 结果表明，褐煤与生物质混合热解遵循单一物质的热解规律，但生物质配入比例对混合热解产物产率有一定影响；其质量配入比例低于50%时，随生物质配入量增加，气体产率增加，800℃时气体产率可从50%以下增加到60%以上；其配入比例增大至50%以上时，气体产率下降5%. 褐煤与生物质混合物热解产物的气体组成与原料单独热解时相似，均以CO2为主，其次为CO, H2，烃类组分中以CH4和C3H6为主，C2H4, C2H6, C3H8次之，C4H8略少，混合物热解气体中CH4含量比褐煤单独热解时高7%以上. 热解温度对气体的热值影响较明显，高温下热解气体热值高，热解温度500~800℃、生物质与褐煤质量配比为1:2时，热解气体的热值从11.38升至16.10 MJ/m3. 拔头条件下，褐煤与生物质混合快速热解的气体产率较高，有利于提高热解气体热值.

关键词: 煤, 生物质, 拔头工艺, 快速热解, 产物, 热值

Abstract: The flash pyrolysis experiments of coal, biomass and their mixture under the simulative conditions of coal topping process were carried out. The effects of pyrolysis temperature and samples on the yield of products, compositions of gas and net calorific value of gas were studied. The results showed that pyrolysis of the mixture of lignite and biomass obeyed the pyrolysis law of single substance, but the additive amount of biomass affected the yield of pyrolysis products. When the mass ratio of biomass to lignite was less than 1:1, the yield of gas increased from below 50% to above 60%, however, while the addictive amount of biomass increased to over 50%, the yield of gas decreased 5%. For the gaseous compositions of pyrolysis of lignite, biomass and their mixture, there were similar changing rules, CO2 was the main component, followed by CO, H2 and hydrocarbon gases. Among hydrocarbon gases, the content of CH4 and C3H6 was higher than that of C2H4, C2H6 and C3H8, and that of C4H8 the least. In addition, the content of CH4 in the gas from the mixture pyrolysis was 20% higher than that from lignite pyrolysis. Pyrolysis temperature had a significant effect on net calorific value of gas, which was increased at high temperature. Under the condition of 500~800℃ of pyrolysis temperature and mass ratio of biomass to lignite at 1:2, the net calorific value of gas increased from 11.38 to 16.10 MJ/m3. Therefore, high yield and calorific value of gas could be obtained for flash pyrolysis of the mixture of lignite and biomass in coal topping process.

Key words: coal, biomass, topping process, flash pyrolysis, product, calorific value

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