主動(dòng)配氣式生物質(zhì)氣化爐流場(chǎng)模擬與試驗(yàn)

doi:10.6041/j.issn.1000-1298.2012.03.018

首頁 > 過刊瀏覽>2012年第43卷第3期 >93-96， 102. DOI:10.6041/j.issn.1000-1298.2012.03.018

主動(dòng)配氣式生物質(zhì)氣化爐流場(chǎng)模擬與試驗(yàn)
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                        10.6041/j.issn.1000-1298.2012.03.018
                    
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基金項(xiàng)目:山東省自然科學(xué)基金資助項(xiàng)目（ZR2009EZ001）;山東大學(xué)研究生自主創(chuàng)新基金資助項(xiàng)目（31360071613057）

Flow Fields Simulation of Biomass Gasifier under Active Air Distribution

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摘要:

對(duì)下吸式固定床氣化爐采用兩層配氣口實(shí)現(xiàn)氣化劑進(jìn)給量的主動(dòng)控制，利用Fluent軟件對(duì)爐內(nèi)氣壓分布和速度進(jìn)行模擬分析，結(jié)果表明氣化爐主要反應(yīng)區(qū)氣壓場(chǎng)呈現(xiàn)“梯級(jí)分布、層界分明”規(guī)律，速度場(chǎng)由上而下逐漸遞增，同一截面流場(chǎng)具有較高的均勻性。以玉米秸稈為原料，對(duì)本氣化爐壓力場(chǎng)和溫度場(chǎng)進(jìn)行了試驗(yàn)研究，結(jié)果表明采取主動(dòng)配氣有利于促進(jìn)氣化爐的均勻反應(yīng)，同一反應(yīng)截面反應(yīng)溫度相對(duì)穩(wěn)定，燃?xì)饨M分波動(dòng)較小，熱值保持在5500kJ/m3以上。

Abstract:

Two layers of air distribution were designed to actively control the agent feed in down-draft fixed bed biomass gasifier. The pressure and velocity distribution inside the gasifier were studied by simulation analysis. The pressure field displayed the law of step distribution and obvious boundaries. The velocity pattern was higher from top to down with high level of uniformity in the same section. Experiments were done to test the pressure and temperature distribution in the gasifier by using corn stalk as materials. The results showed that it had an important effect of active air distribution on promoting the reaction uniformity. The temperature kept stability at the same section with little changes of the gas components, and calorific value kept above 5 500kJ/m3.This method can provide a new way to improve the working performance of the fixed gasifier.

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郭飛強(qiáng),董玉平,景元琢,董磊,王慧,杜紅光.主動(dòng)配氣式生物質(zhì)氣化爐流場(chǎng)模擬與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(3):93-96， 102. Guo Feiqiang, Dong Yuping, Jing Yuanzhuo, Dong Lei, Wang Hui, Du Hongguang. Flow Fields Simulation of Biomass Gasifier under Active Air Distribution[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(3):93-96， 102.

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