化工学报 ›› 2019, Vol. 70 ›› Issue (5): 1991-1998.doi: 10.11949/j.issn.0438-1157.20181327

• 能源和环境工程 • 上一篇    下一篇

民用解耦燃煤炉中的NO x 和CO同时减排

韩健1,2(),刘新华1(),何京东3,李虹嶙1,张楠1   

  1. 1. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190
    2. 中国科学院大学化学工程学院,北京 100049
    3. 中国科学院,北京 100864
  • 收稿日期:2018-11-14 修回日期:2019-02-14 出版日期:2019-05-05 发布日期:2019-05-10
  • 通讯作者: 刘新华 E-mail:hanjian@ipe.ac.cn;xhliu@ipe.ac.cn
  • 作者简介:<named-content content-type="corresp-name">韩健</named-content>(1993—),男,博士研究生,<email>hanjian@ipe.ac.cn</email>|刘新华(1974—),男,博士,研究员,<email>xhliu@ipe.ac.cn</email>
  • 基金资助:
    中国科学院A类战略性先导科技专项(XDA21040400)

Simultaneous reduction of NO x and CO emissions in domestic decoupling coal-fired stoves

Jian HAN1,2(),Xinhua LIU1(),Jingdong HE3,Honglin LI1,Nan ZHANG1   

  1. 1. State Key Laboratory of Multiphase Complicated Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
    3. Chinese Academy of Sciences, Beijing 100864, China
  • Received:2018-11-14 Revised:2019-02-14 Online:2019-05-05 Published:2019-05-10
  • Contact: Xinhua LIU E-mail:hanjian@ipe.ac.cn;xhliu@ipe.ac.cn

摘要:

典型民用解耦燃煤炉具有底部连通的两个分别被称为热解室和燃烧室的并列炉膛,煤炭从热解室上部加入,空气通过热解室底部的倾斜炉排引入。结合煤炭燃烧过程中的氮转移路线与解耦炉中的气体循环流动特征,定性分析了民用解耦燃煤炉中的NO x 和CO同时减排机理,并在此基础上对配风和煤种等因素对NO和CO排放的影响进行了定量实验研究。结果表明,民用解耦燃煤炉特有的结构特征和通风方式有利于NO x 和CO的同时减排,解耦炉具与洁净型煤匹配可显著降低综合污染物排放。

关键词: 煤燃烧, 污染, 氮氧化物, 一氧化碳, 民用炉具

Abstract:

A typical civil decoupling coal-fired stove has two parallel furnaces, called a pyrolysis chamber and a combustion chamber, which are connected at the bottom, coal is introduced from the upper part of the pyrolysis chamber, and air is introduced through the inclined grate at the bottom of the pyrolysis chamber. Based on the profound understanding of both the nitrogen transformation route in coal combustion and the characteristics of gas flow circulation in decoupling stoves, the mechanisms of simultaneous reduction of NO x and CO emissions in domestic decoupling coal-fired stoves were qualitatively analyzed in this paper. The influences of draft type and coal property on NO and CO emissions were experimentally studied further. The results indicate that the simultaneous suppression of NO x and CO emissions in a domestic decoupling coal-fired stove can be mainly attributed to its unique geometry structure and draft type. Burning clean briquettes in decoupling stoves helps to reduce pollutant emissions significantly.

Key words: coal combustion, pollution, nitrogen oxide, carbon monoxide, domestic stove

中图分类号: 

  • TQ 534

图1

民用解耦燃煤炉典型结构示意图"

表1

三种烟煤型煤的性质"

燃料 工业分析(收到基)/% 元素分析(收到基)/% 收到基低位发热量/(MJ/kg)
水分 挥发分 固定碳 灰分
1# 5.0 22.7 51.5 20.8 61.0 3.4 7.9 1.1 0.8 22.55
2# 2.4 26.8 34.2 36.6 46.4 3.2 9.6 0.9 0.9 17.84
3# 2.2 29.2 48.9 19.7 63.7 4.5 8.1 1.2 0.6 25.18

图2

解耦炉中燃料N的转化路线"

图3

解耦炉内气体流线图"

图4

不同还原作用下民用解耦燃煤炉内的NO浓度分布"

图5

民用解耦燃煤炉内的CO浓度分布"

图6

调节风Ⅰ对污染物排放的影响"

图7

调节风Ⅱ对污染物排放的影响"

图8

三种型煤稳定燃烧时的污染物排放"

图9

点火、旺火、稳定燃烧全过程的污染物排放"

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