本文選題：煤泥 + 離心過濾　； 參考：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文

【摘要】：本文針對(duì)煤泥離心過濾濾餅結(jié)構(gòu)及滲流規(guī)律研究現(xiàn)狀,分析了離心過濾濾餅層的顆粒分布、孔隙分布及阻力分布規(guī)律;探討了離心過濾滲流規(guī)律;探索了離心過濾與加壓協(xié)同作用下濾餅脫水極限。首先,基于離心沉降的原理,對(duì)煤泥離心過濾濾餅形成過程中的液相流動(dòng)和固體沉降行為進(jìn)行了分析,揭示了離心過濾中固體顆粒沉降和液體壓力的分布規(guī)律。其次,設(shè)計(jì)開發(fā)了煤泥離心過濾脫水工藝試驗(yàn)裝置,在煤泥離心過濾成餅規(guī)律研究的基礎(chǔ)上,對(duì)不同條件下形成的濾餅進(jìn)行徑向分層,分析其粒度分布,揭示了離心過濾濾餅層的顆粒粒度沿濾餅厚度方向的分布規(guī)律,探討了粒度分布對(duì)濾餅孔隙結(jié)構(gòu)及阻力分布的影響機(jī)制。然后,基于毛細(xì)管模型探討了離心過濾過程的飽和滲流及非飽和滲流特征,并對(duì)影響離心過濾過程液體滲流的主導(dǎo)因素進(jìn)行了分析。最后,開展了離心過濾與氣體加壓脫水試驗(yàn),研究了離心過濾與加壓作用下脫水效果,探討了氣體穿流作用對(duì)毛細(xì)孔隙水流動(dòng)的影響機(jī)制,揭示了煤泥離心過濾與氣體加壓作用及濾餅脫水極限之間的關(guān)系。
[Abstract]:In this paper, the particle distribution, pore distribution and resistance distribution of centrifugal filter cake layer are analyzed according to the present situation of research on the structure and percolation law of centrifugal filter cake, and the seepage law of centrifugal filtration is discussed. The dehydration limit of filter cake under the synergistic action of centrifugal filtration and pressure was explored. Firstly, based on the principle of centrifugal sedimentation, the liquid phase flow and solid settlement behavior during the formation of coal slime filter cake are analyzed, and the distribution of solid particle sedimentation and liquid pressure in centrifugal filtration is revealed. Secondly, the experimental equipment of coal slime centrifugal filtration and dehydration process is designed and developed. On the basis of the study of cake forming law of coal slime centrifugal filtration, the filter cake formed under different conditions is sliced in radial direction, and its particle size distribution is analyzed. The distribution of particle size along the thickness of filter cake is revealed, and the influence mechanism of particle size distribution on pore structure and resistance distribution of filter cake is discussed. Then, based on the capillary model, the characteristics of saturated and unsaturated percolation in centrifuge filtration process are discussed, and the main factors affecting liquid seepage in centrifugal filtration process are analyzed. Finally, the experiments of centrifugal filtration and gas pressure dehydration were carried out, and the effect of centrifugal filtration and pressure on dehydration was studied, and the influence mechanism of gas flow on capillary pore water flow was discussed. The relationship between the centrifugal filtration of coal slime and the pressure of gas and the dehydration limit of filter cake is revealed.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD94

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