本文關(guān)鍵詞：配風(fēng)方式對(duì)層燃爐燃燒特性影響的試驗(yàn)研究，，由筆耕文化傳播整理發(fā)布。

網(wǎng)友gd433近日為您收集整理了關(guān)于配風(fēng)方式對(duì)層燃爐燃燒特性影響的試驗(yàn)研究的文檔，希望對(duì)您的工作和學(xué)習(xí)有所幫助。以下是文檔介紹：上海交通大學(xué)碩士學(xué)位論文配風(fēng)方式對(duì)層燃爐燃燒特性影響的試驗(yàn)研究姓名:常兵申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):熱能工程指導(dǎo)教師:虞亞輝;羅永浩20070225上海交通大學(xué)碩士學(xué)位論文I配風(fēng)方式對(duì)層燃爐燃燒特性影響的試驗(yàn)研究摘 要我國(guó)大部分的層燃鍋爐長(zhǎng)期處于熱效率低下、污染物排放嚴(yán)重的運(yùn)行狀態(tài),已經(jīng)成為國(guó)家近年來要重點(diǎn)治理的高能耗設(shè)備。配風(fēng)的研究對(duì)層燃爐提高效率具有舉足輕重的意義。本文以一臺(tái)鏈條爐為例進(jìn)行了實(shí)爐試驗(yàn),并通過單元體爐試驗(yàn)臺(tái)研究不同煤種的配風(fēng)特性,再輔以數(shù)值模擬,主要針對(duì)以下三個(gè)問題開展研究:首先是橫向配風(fēng)均勻性問題:通過實(shí)爐冷態(tài)配風(fēng)試驗(yàn),結(jié)合數(shù)值模擬和熱態(tài)運(yùn)行測(cè)試,發(fā)現(xiàn)了配風(fēng)系統(tǒng)存在的問題,為風(fēng)室的改造提出了可行性建議。其次是縱向配風(fēng)對(duì)燃燒特性的影響:在實(shí)爐上進(jìn)行了均勻配風(fēng)、盡早配風(fēng)和推遲配風(fēng)三個(gè)工況的試驗(yàn),得到了煤層表面的H2、O2、CH4、CO、CO2等氣體成分以及溫度沿爐排長(zhǎng)度方向變化的規(guī)律;然后用時(shí)間模擬空間的方法,采用單元體爐試驗(yàn)臺(tái)研究動(dòng)力#2煤和神木煤在不同配風(fēng)方式下的燃燒特性。最后是縱向配風(fēng)對(duì)NOx生成的影響:在實(shí)爐上對(duì)尾部煙氣中的NOx成分進(jìn)行測(cè)量,得到了不同配風(fēng)方式下的NOx生成規(guī)律。上海交通大學(xué)碩士學(xué)位論文II試驗(yàn)結(jié)果表明,針對(duì)此臺(tái)鏈條爐,在較高負(fù)荷下,采用推遲配風(fēng)方式,再結(jié)合特定的“雙人字型”爐拱,可以達(dá)到提高鍋爐效率、降低NOx排放的較好效果。關(guān)鍵詞:配風(fēng)方式,層燃爐,燃燒特性,單元體爐,NOx上海交通大學(xué)碩士學(xué)位論文IIIEXPERIMENTAL STUDY OF THE INFLUENCE ON BUSTION CHARICTERISTICS IN THE STOKER BOILER BY AIR DISTRIBUTION MODES ABSTRACT Most of the stoker boilers in China are operated under low efficiency situation and release a great deal of pollutants, so they have already been the high energy-consumption facilities that our country intends to bring under control in recent years. Research of air distribution modes plays an important role in increasing the efficiency of stoker boilers. Taking a chain grate stoker for example, experiments are carried out on this stoker and unit furnace, together with numerical simulation, in order to research air distribution characteristics for different coal types. Three problems are studied as follows. The first problem is related to transverse air flow distribution. Through cold test of air distribution on the stoker bined with numerical simulation and hot operation test, problems of air system are found. And feasible suggestions are put forward for the modification of wind box. 上海交通大學(xué)碩士學(xué)位論文IVThe second problem is concerning the influence on bustion characteristics by longitudinal air distribution. Three experiments are conducted on the chain grate stoker under uniform, front-enhanced and rear-enhanced modes. And the laws of H2、O2、CH4、CO、CO2 and temperature along the length of grate are obtained. Then, the method of time simulating space is adopted in order to study bustion characteristics of dongli #2and shenmu coal under different air distribution modes in the unit furnace. The last one is the influence on the generation of NOx by longitudinal air distribution. The amount of NOx in tail flue gas of the chain grate stoker is measured and the generation law of NOx under different air distribution modes is attained. The results show that for this stoker boiler, when operated under high load, rear-enhanced air distribution mode can increase the boiler efficiency and decrease NOx bined with double herringbone arch. KEY WORDS: air distribution mode, stoker boiler, combustion characteristics, unit furnace, NOx上海交通大學(xué)碩士學(xué)位論文VII主要符號(hào)說明符號(hào)定義α過�？諝庀禂�(shù)2q排煙熱損失(%)3q化學(xué)不完全燃燒熱損失(%)4q機(jī)械不完全燃燒熱損失(%)5q散熱損失(%)6q灰渣物理熱損失(%)pη爐排橫向配風(fēng)不均勻系數(shù)0kV理論空氣量(Nm3/kg)L 鏈條爐排移動(dòng)距離(m)v爐排移動(dòng)的平均速度(m/s)t 時(shí)間(s)T 熱力學(xué)溫度(K)下標(biāo)定義i 通用變量j 通用變量max 最大值min 最小值上海交通大學(xué)學(xué)位論文原創(chuàng)性聲明本人鄭重聲明:所呈交的學(xué)位論文,是本人

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  本文關(guān)鍵詞：配風(fēng)方式對(duì)層燃爐燃燒特性影響的試驗(yàn)研究，由筆耕文化傳播整理發(fā)布。