Numerical simulation on low NO<sub>x</sub> combustion of pulverized coal by low temperature pre-combustion

LIU Changchun; HUI Shien; DENG Jun

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Numerical simulation on low NO_x combustion of pulverized coal by low temperature pre-combustion

更新时间：2025-09-28

- Numerical simulation on low NO_x combustion of pulverized coal by low temperature pre-combustion
- Thermal Power Generation Vol. 46, Issue 7, Pages: 54-59(2017)
- 作者机构：
  
  1. 西安科技大学安全科学与工程学院
  2. 西安交通大学能源与动力学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK16
- Published：2017
- 稿件说明：
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LIU Changchun, HUI Shien, DENG Jun. Numerical simulation on low NO_x combustion of pulverized coal by low temperature pre-combustion[J]. Thermal power generation, 2017, 46(7): 54-59.
DOI：

LIU Changchun, HUI Shien, DENG Jun. Numerical simulation on low NO_x combustion of pulverized coal by low temperature pre-combustion[J]. Thermal power generation, 2017, 46(7): 54-59. DOI：

摘要

为解决煤粉低温预燃低NO_x燃烧技术整体仿真建模难的问题

采用化学动力学简化模型和三维CFD计算模型2种方法计算了预燃室出口烟气成分

并将结果作为已知值输入炉膛燃烧的CFD仿真模型中

基于已有实验参数的模拟结果与实验值的对比证明此耦合仿真计算方法可靠。为获得烟气停留时间对脱硝效率的影响规律

对4种二级主燃区长度工况(900、1 200、1 500、1 800 mm)下的燃烧情况进行模拟。结果表明

NO排放随着烟气在主燃区停留时间的增加

近似线性地减少

原因是在二级主燃区内主要靠碳烟颗粒将NO还原为N_2。本文的结论可适用于其他气体燃料作为预燃室预热燃料的情况。

Abstract

In order to solve the difficult problems occurred during numerical simulation modeling of low temperature pre-combustion

the chemical kinetic simplified model and three-dimensional CFD model were used to calculate the composition of flue gas at outlet of the pre-combustion chamber. Then

the obtained flue gas compositions were introduced into the furnace combustion simulation study as known values. Comparison between the simulation results and the experimental data proved that this simulation method is reliable. In order to obtain the effect of flue gas residence time on denitrification efficiency

the furnace combustion with four secondary main combustion zone lengths(900 mm

1 200 mm

1 500 mm and 1 800 mm) were simulated. The results show that the NO emissions decrease linearly with the increasing residence time in the main combustion zone. The reason is that NO is reduced to N2 mainly by soot in the secondary main combustion zone. The conclusion is suitable to situations that other gases are used as the preheating fuels in the pre-combustion chamber.

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Numerical simulation on low NOx combustion of pulverized coal by low temperature pre-combustion

DOI：

摘要

Abstract

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references

Numerical simulation on low NO_x combustion of pulverized coal by low temperature pre-combustion