废轮胎热解富芳烃油燃烧温度与烟气污染物排放特性

殷志童; 吕洪炳; 张东明; 许姣; 黄群星; 钟浥柳; 黄平安; 潘宇涵

doi:10.13205/j.hjgc.202210014

废轮胎热解富芳烃油燃烧温度与烟气污染物排放特性

doi: 10.13205/j.hjgc.202210014

1. 浙江大学热能工程研究所能源清洁利用国家重点实验室, 杭州 310013;
2. 浙江浙能兴源节能科技有限公司, 杭州 311121

基金项目:

浙江省重点研发计划项目(2020C03084)

详细信息

作者简介:
殷志童(1997-),男,硕士研究生在读,主要研究方向为废轮胎热解油雾化燃烧。21927012@zju.edu.cn

通讯作者:
黄群星(1977-),男,教授,主要研究方向为燃烧诊断、废弃物热解气化、废橡塑废弃物热解、废弃物制氢。hqx@ zju.edu.cn

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出版历程
- 收稿日期: 2021-11-16

COMBUSTION TEMPERATURE AND EMISSION CHARACTERISTICS OF FLUE GAS POLLUTANTS OF WASTE TIRES PYROLYSIS OIL RICH IN AROMATICS

1. State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310013, China;
2. Zhejiang Zheneng Xingyuan Energy Saving Technology Co., Ltd, Hangzhou 311121, China

摘要

摘要: 清洁燃烧是各类有机固废热解油高效能源化利用的主要途径。全钢废轮胎热解油产物中芳香烃含量约占30%,其热值及黏度与柴油相似,但闪点偏低,仅为20℃。在自建燃烧炉膛中进行燃烧实验,研究了废轮胎热解油的燃烧温度及烟气排放特性。实验发现,当过量空气系数为1.3时,热解油燃烧温度最高;当过量空气系数为1.4时,烟气中CO浓度降至0;NO_x浓度随着过量空气系数增大而升高;过量空气系数超过1.3后,SO₂浓度大幅降低。喷射油压提升可提高燃烧温度,使热解油燃烧更加充分,同时可降低烟气中CO浓度,促进热力型NO_x生成。当压力由1.5 MPa升至1.75 MPa时,燃烧温度、CO浓度与NO_x浓度变化幅度最大。喷嘴喷孔直径增大会使雾化锥角增大,燃油雾束更易展开与空气接触反应,CO浓度随之降低;同时雾化锥角的增大可减小喷雾贯穿距,缩短火焰长度,减少烟气在高温区的停留时间,降低NO_x浓度。
- 热解富芳烃油 /
- 过量空气系数 /
- 油压 /
- 喷嘴 /
- 燃烧温度 /
- 烟气污染物
Abstract: Clean combustion is the main way for the efficient energy utilization of pyrolysis oil of organic solid wastes. The content of aromatic hydrocarbons accounted for about 30% of pyrolysis oil from all-steel waste tires. The thermal value and viscosity of the pyrolysis oil were similar to that of diesel, but the flash point was much lower, only 20℃. In this study, combustion experiments were carried out in a self-designed furnace, and the characteristics of the combustion temperature and flue gas emission of pyrolysis oil were studied. It was found that the combustion temperature reached the highest when the excess air ratio was 1.3. When the excess air ratio increased to 1.4, CO content in the flue gas dropped to 0. NO_x content increased with the increase of excess air ratio. When the excess air ratio exceeded 1.3, SO₂ content decreased substantially. The increase of injection oil pressure could increase the combustion temperature, making the combustion more adequate, reducing CO content in the flue gas, and promoting the generation of thermal NO_x. When the pressure rose from 1.5 MPa to 1.75 MPa, the combustion temperature, the CO content and the NO_x content varied the most. The increase of the nozzle orifice diameter could increase the atomization cone angle, expand the oil fog to contact with the air at a larger angle, and CO content dropped accordingly. Meanwhile, the increase of atomization cone angle could reduce the spray penetration distance, which shortened the flame length and the residence time of flue gas in high-temperature area, and reduced NO_x content.
- pyrolysis aromatic-enriched oil /
- excess air ratio /
- oil pressure /
- nozzle /
- combustion temperature /
- flue gas pollutant

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