Numerical study of NOx reduction by reburning mechanically-activated micronized coal in a full-scale tangentially-fired boiler

被引：0

作者：

Chernetskiy, M. ^{[1
,2
]}

Dekterev, A. ^{[1
,2
]}

Hanjalic, K. ^{[3
,4
]}

机构：

[1] SB RAS, Kutateladze Inst Thermophys, Novosibirsk, Russia

[2] Siberian Fed Univ, Krasnoyarsk, Russia

[3] Novosibirsk State Univ, Novosibirsk, Russia

[4] Delft Univ Technol, Chem Eng Dept, Delft, Netherlands

来源：

PROCEEDINGS OF THE EIGHTH INTERNATIONAL SYMPOSIUM ON TURBULENCE HEAT AND MASS TRANSFER (THMT-15) | 2015年

基金：

俄罗斯科学基金会;

关键词：

COMBUSTION;

D O I：

10.1615/ICHMT.2015.THMT-15.1750

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The paper presents some results of numerical simulation of the effects of reburning of mechanically-activated micronized coal on NOx reduction in a tangentially fired boiler of 500 t/h steam production. The conventional RANS approach was used to compute two-phase (reactive dispersed particles in gaseous medium) multi-component system, with some modifications of models of particle heat transfer and their reactions. The comprehensive model was earlier verified in simulation of an 5 MW experimental combustor as well as in a full-scale real boiler. The comparison with the standard firing with pulverized coal showed that reburning of non-activated fine coal leads to a NOx reduction by about 20%, but increases the unburnt carbon residual by 23%. However, reburning of mechanically-activated coal of the same granulation reduces NOx by 30% and also diminishes the unburnt residual by 35%, demonstrating that reburning in general, but especially of activated micronized coal, is a feasible option for achieving significant reduction in NOx emission.

引用

页码：779 / 782

页数：4

共 4 条

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Shen, Jun ;

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