煤粉爐C型直流燃燒器的燃燒數(shù)值模擬
[Abstract]:Burner is an important device of boiler organization combustion in power plant. Main pulverized coal direct current burner. The flow and combustion of gas-solid two-phase flow of pulverized coal particles in furnace plays an important role in the study of combustion efficiency and steady combustion of pulverized coal. In recent years, more strict environmental protection standards have been established for thermal power plants, and low nitrogen combustion emissions have become the focus of research in scientific research institutions and actual production of power plants. In this paper, the combustion numerical simulation of new type C direct current burner and C type direct current burner in power plant boiler is carried out by commercial software CFDs. Firstly, the numerical simulation of a single C-type direct current burner is carried out to study the temperature cloud pattern of pulverized coal particles burning through the C-type burner and the ignition of the pulverized coal particles in the direction of injection. The pulverized coal can form a C-shaped pulverized coal jet in the furnace through the C-type direct current burner and form a small flame ignition area at the two ends of the pulverized coal. The relative surface area is large and the relative concentration of the pulverized coal is relatively high. Because of the large surface area of the two tip regions and the high temperature smoke around it, the maximum smoke entrainment per unit volume is formed, which forms a small flame ignition area with superior ignition performance, which makes the pulverized coal easily ignite and stable. Secondly, the effect of different tip angle on the performance of C type DC burner is studied separately in this paper. It can be found that the smaller the angle of the tip, the more obvious the effect of small flame and double side ignition. Finally, using RNG-turbulence model, the C type direct current burner is applied to the boiler of a 300MW power plant, and the combustion of pulverized coal and the emission of pollutants are numerically simulated. Promoting pulverized coal combustion stability and flammability in furnace has obvious effect, and can promote the reduction of nitrogen oxide emission to some extent.
【學(xué)位授予單位】:上海交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類(lèi)號(hào)】:TM621.2
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 趙旺初;集富型直流燃燒器可節(jié)省燃油[J];節(jié)能;2000年05期
2 趙旺初;集富型直流燃燒器可節(jié)省燃油[J];鍋爐制造;1999年04期
3 蔡斌,楊建華,薛立軍;豐鎮(zhèn)發(fā)電廠直流燃燒器布置方式的改進(jìn)[J];內(nèi)蒙古電力技術(shù);2003年02期
4 王春昌;屈衛(wèi)海;;一種中心風(fēng)可調(diào)的直流燃燒器設(shè)想[J];熱力發(fā)電;2007年12期
5 趙振興;曹子棟;常勇強(qiáng);;高爐煤氣直流燃燒器的試驗(yàn)研究[J];動(dòng)力工程學(xué)報(bào);2010年02期
6 張濟(jì)顯;陳天順;;直流燃燒器過(guò)熱變形的原因及對(duì)策[J];電力安全技術(shù);2011年09期
7 丁玉輝;船型直流燃燒器在鍋爐上的應(yīng)用[J];中氮肥;1995年01期
8 高松松;四角布置直流燃燒器的燃燒淺析[J];東北電力技術(shù);2005年09期
9 陳玉忠;石踐;羅小鵬;侯玉波;;新型縫隙式直流燃燒器的研究與應(yīng)用[J];中國(guó)電力;2012年04期
10 曾瑞良,徐秀清;富集型煤粉直流燃燒器的穩(wěn)燃原理及應(yīng)用[J];中國(guó)電力;1999年03期
相關(guān)會(huì)議論文 前1條
1 隋金雪;楊莉;華臻;張?chǎng)?;改進(jìn)的BP網(wǎng)絡(luò)在火焰燃燒狀態(tài)識(shí)別中的應(yīng)用[A];第二十七屆中國(guó)控制會(huì)議論文集[C];2008年
相關(guān)博士學(xué)位論文 前1條
1 夏振海;煤粉濃淡直流燃燒器氣固多相流動(dòng)的數(shù)值試驗(yàn)研究[D];浙江大學(xué);2002年
相關(guān)碩士學(xué)位論文 前5條
1 彭彬彬;煤粉爐C型直流燃燒器的燃燒數(shù)值模擬[D];上海交通大學(xué);2015年
2 秦建新;660MW機(jī)組“W”火焰改直流燃燒器燃燒狀況調(diào)整研究[D];華北電力大學(xué)(河北);2010年
3 王凌力;煤與生物質(zhì)在撞擊塊式低NO_X濃淡直流燃燒器中運(yùn)動(dòng)特性的研究[D];浙江大學(xué);2015年
4 田宏亮;豐鎮(zhèn)發(fā)電廠670t/h鍋爐直流燃燒器改造及運(yùn)行優(yōu)化[D];華北電力大學(xué);2011年
5 張紅泉;直流燃燒器一次風(fēng)通道內(nèi)氣固兩相流動(dòng)數(shù)值模擬[D];上海交通大學(xué);2008年
,本文編號(hào):2156003
本文鏈接:http://sikaile.net/kejilunwen/dianlilw/2156003.html