Release of nitrogen during coal water slurry gasification in entrained-flow gasifier

CHEN Zhong; YUAN Shuai; LIANG Qinfeng; WANG Fuchen; YU Zunhong

您当前的位置：

首页 >

文章列表页 >

Release of nitrogen during coal water slurry gasification in entrained-flow gasifier

更新时间：2025-12-10

- Release of nitrogen during coal water slurry gasification in entrained-flow gasifier
- CIESC Journal Issue 11, Pages: 2884-2890(2008)
- 作者机构：
  
  华东理工大学煤气化教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 November 2008，
  
  Published：05 November 2008
- 稿件说明：
移动端阅览
CHEN Zhong, YUAN Shuai, LIANG Qinfeng, et al. Release of nitrogen during coal water slurry gasification in entrained-flow gasifier[J]. CIESC Journal, 2008, (11): 2884-2890.
DOI：

CHEN Zhong, YUAN Shuai, LIANG Qinfeng, et al. Release of nitrogen during coal water slurry gasification in entrained-flow gasifier[J]. CIESC Journal, 2008, (11): 2884-2890. DOI：

摘要

在四喷嘴对置式气流床气化炉中，考察了水煤浆在不同氧碳比气化条件下HCN、NH3、NO和N2的轴径向浓度。结果表明：氮污染物(HCN、NH3、NO)在喷嘴平面处即产生并浓度最高，其主要来源于煤粒快速热解时析出的挥发分，远离喷嘴平面时三者浓度大幅降低并大多转化为N2，且氧碳比增高有利于N2的生成，气化室出口处浓度N2>HCN>NH3>NO；流场分布使气化室出口附近径向浓度基本一致，而其上部各平面位置靠近炉壁处浓度较低；煤浆中的适量水分有利于HCN和NH3生成，但过量水分不利于挥发氮析出，使HCN、NH3和NO生成量降低。

Abstract

Various axial and radial concentrations of HCN

NH3

NO and N2 were measured during the gasification of coal water slurry (CWS) in a laboratory opposed multi-burner gasifier.The results showed that the majority of nitrogen pollutants (HCN

NH3 and NO) came from the release of volatile nitrogen of coal during the rapid heating process of devolatilization.The maximum concentrations of nitrogen pollutants were produced at the nozzle plane and decreased away from the plane; moreover

the ordering in the aft-region was N2>HCN>NH3>NO.Increase of O2/C ratio tended to favor the formation of N2.Flow field distribution led to uniform radial concentrations at the exit and low concentrations near the side-wall in other axial positions.A proper amount of water in CWS tended to favor the formation of HCN and NH3.However

the introduction of excessive steam played a role in restraining the release of volatile nitrogen and reducing the concentrations of HCN

NH3 and NO.

关键词

Keywords

references

Views

262

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Primary breakup characteristics of air-blast atomization of coal-water slurry

Transport of PAHs in soils with action of microorganisms

Properties of fly ash in opposed multi-burner gasifier

Hot water treatment of low rank coal in high temperature and high pressure reactor and its slurry ability

Controlled synthesis of Bi2MoO6/MoO3 composite fibers via in-situ hydrothermal method and their high-efficiency photocatalytic hydrogen production performance

Related Author

LIU Haifeng

XU Jianliang

LI Weifeng

MENG Qinwei

ZHAO Hui

CHENG Wei

ZHENG Lei

TAN Wenjie

Related Institution

北京师范大学水科学研究院水沙科学教育部重点实验室

能源清洁利用国家重点实验室(浙江大学)

⁰