本文選題：煤巖混合粉塵　切入點(diǎn)：粉塵云　出處：《遼寧工程技術(shù)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：粉塵云最低著火溫度是粉塵爆炸中的一個(gè)非常重要的特征參數(shù)。為研究煤巖混合型粉塵的粉塵云最低著火溫度的影響因素,探究煤的工業(yè)分析參數(shù)與煤塵云最低著火溫度的關(guān)系、混合粉塵中巖粉含量與混合粉塵云最低著火溫度關(guān)系和外加水分對(duì)混合粉塵云最低著火溫度的影響。本文選取了10種工業(yè)分析參數(shù)有一定差距的煤樣,利用粉塵云最小點(diǎn)火溫度測定儀測試純煤粉的最低著火溫度,并在上述煤樣中選出5種揮發(fā)分含量差距較大的煤樣和巖粉以不同的巖粉含量(20%、30%、40%、50%、60%、70%和80%)配制煤巖混合型粉塵,測試混合型粉塵云最低著火溫度,通過外加水分的方式向混合粉塵中加入質(zhì)量分?jǐn)?shù)為5%~35%的水分,測試其混合粉塵云最低著火溫度。實(shí)驗(yàn)結(jié)果表明:煤的揮發(fā)分與粉塵云最低著火溫度在整體趨勢上呈線性相關(guān),而煤的內(nèi)在水分和內(nèi)在灰分對(duì)粉塵云最低著火溫度影響相對(duì)較小;對(duì)于混合粉塵來說,巖粉含量低于40%時(shí),巖粉的混合會(huì)導(dǎo)致混合型粉塵云最低著火溫度的小幅度的變化,當(dāng)巖粉含量高于40%時(shí),煤巖混合型粉塵最低著火溫度會(huì)隨巖粉含量的增加而大幅度升高;揮發(fā)分含量越小的煤粉,其混合粉塵云最低著火溫度受到巖粉含量的影響越明顯;外加水分含量的增加會(huì)使混合型粉塵云最低著火溫度顯著升高,揮發(fā)分含量越小的混合煤粉,對(duì)巖粉含量和水分含量的變化越敏感。
[Abstract]:The minimum ignition temperature of dust cloud is a very important characteristic parameter in dust explosion. The relationship between the industrial analysis parameters of coal and the minimum ignition temperature of coal dust cloud is studied. The relationship between rock powder content in mixed dust and minimum ignition temperature of mixed dust cloud and the effect of added moisture on minimum ignition temperature of mixed dust cloud are discussed. Ten coal samples with different industrial analysis parameters are selected in this paper. The minimum ignition temperature of pure pulverized coal was measured by using the dust cloud minimum ignition temperature tester, and five kinds of coal and rock powder with big difference in volatile content were selected out of the above coal samples to prepare coal and rock mixed dust with different rock powder content (20%) and different rock powder content (20%, 40%, 50%, 70% and 80%). The minimum ignition temperature of the mixed dust cloud was measured, and the water content of 5% was added to the mixed dust by adding additional moisture. The experimental results show that there is a linear correlation between the volatile matter of coal and the minimum ignition temperature of dust cloud in the whole trend. For mixed dust, when the content of rock powder is lower than 40, the mixing of rock powder will result in a small change of minimum ignition temperature of mixed dust cloud. When the content of rock powder is higher than 40, the minimum ignition temperature of coal and rock mixed dust increases greatly with the increase of rock powder content, the lower the volatile content is, the more obvious is the minimum ignition temperature of mixed dust cloud affected by rock powder content. The minimum ignition temperature of mixed dust cloud increases significantly with the increase of water content. The lower the volatile content is, the more sensitive the mixture is to the change of rock powder content and water content.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD714.5

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本文編號(hào)：1617398