Energy cascade release of coal in different oxidation environment

YAN Qiuhui; HOU Yanwan; LUO Jieren; MIAO Haijun

doi:10.11949/j.issn.0438-1157.20161011

您当前的位置：

首页 >

文章列表页 >

Energy cascade release of coal in different oxidation environment

更新时间：2025-11-26

- Energy cascade release of coal in different oxidation environment
- CIESC Journal Issue 12, Pages: 5305-5310(2016)
- 作者机构：
  
  西安建筑科技大学环境与市政工程学院,陕西,西安,710055
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161011
  CLC： K16TQ534TQ536
- Online First：05 December 2016，
  
  Published：05 December 2016
- 稿件说明：
移动端阅览
YAN Qiuhui, HOU Yanwan, LUO Jieren, et al. Energy cascade release of coal in different oxidation environment[J]. CIESC Journal, 2016, (12): 5305-5310.
DOI：

YAN Qiuhui, HOU Yanwan, LUO Jieren, et al. Energy cascade release of coal in different oxidation environment[J]. CIESC Journal, 2016, (12): 5305-5310. DOI： 10.11949/j.issn.0438-1157.20161011.

摘要

针对传统煤燃烧能量利用效率低、污染严重等问题，将超临界水氧化技术应用于煤的清洁燃烧过程，分析了煤在空气和超临界水两种不同的氧化氛围中的反应特性。进而，基于不同的反应路径，利用图像(火用)分析法，剖析了煤在两种氧化氛围中的能量转换特点，揭示了煤在水相氧化氛围中的能量释放新机理，最后对煤在超临界水氧化反应器和传统锅炉中的实际过程进行了(火用)分析。结果表明，水相氧化将煤的化学能品位从1降低到0.83，并且减小了煤的化学能品位与热源品位之差，从而降低了煤中化学能向物理能转变的不可逆损失，(火用)损失减少了6.04%，热(火用)增加了5.25%，而且水相氧化没有传热(火用)损失；运用(火用)分析理论，计算得到超临界水氧化反应器(火用)效率高达80.1%，高出传统锅炉(火用)效率24.2%。

Abstract

Introducing the supercritical water oxidation technology into the clean combustion of coal to solve serious problems of low combustion efficiency and pollution of traditional coal combustion

this paper analyzed the reaction characteristics of coal in two different oxidizing atmosphere of air and supercritical water. Furthermore

based on different reaction paths and by means of the energy utilization diagram methodology

the energy conversion characteristics of coal oxidizing in different atmosphere were analyzed

and the new mechanism of energy release of coal oxidizing in aqueous phase was revealed. Finally

the exergy analysis of practical application process of two kinds of oxidation was carried out. The results showed that the aqueous phase oxidation of coal reduced chemistry exergy level from 1 to 0.83

this is to say

the grade difference between chemistry energy and heat source was decreased

indicating that it reduced the irreversible loss of the conversion process from chemical energy into physical energy

exergy losses decreased about 6.04% and thermal exergy increased by 5.25%. The exergy efficiency of coal oxidation in supercritical water was as high as 80.1% about 24.2% higher than oxidation in air

and thus it can greatly improve the exergy efficiency.

关键词

Keywords

references

Views

245

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research and progress of volatile-char interaction during biomass and coal (co-)pyrolysis/gasification process

Origin of low productivity of underground coal gasification: diffusion and reaction in stagnant boundary layer and gasification tunnel

Fluidized bed two-stage gasification of coal with steam/O2 for production of low-tar syngas

Fundamentals and pilot demonstration of coal directional pyrolysis to high quality tar and gas products based on process intensification and reaction regulation

Synthesis of N-doped carbon micro-nanotubes using coal-based polyaniline as a carbon and nitrogen source

Related Author

MA Meng

BAI Yonghui

WEI Juntao

YAN Lunjing

LYU Peng

WANG Jiaofei

SONG Xudong

SU Weiguang

Related Institution

Institute of Clean Coal Technology, East China University of Science and Technology

State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology

State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University

College of Materials Science and Engineering, Nanjing Forestry University

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology

⁰