本文選題：螺帶槳　切入點：粉體　出處：《北京化工大學(xué)》2015年碩士論文

【摘要】：本文在直徑為0.476 m的標(biāo)準(zhǔn)橢圓封底的透明有機玻璃槽內(nèi),對粉體攪拌進(jìn)行了功率特性和混合性能的研究。實驗過程中以樹脂顆粒與玻璃珠顆粒為實驗原料,通過改變攪拌槳組合方式、填料高度、轉(zhuǎn)速等探究粉體攪拌功率的變化規(guī)律,并對功率準(zhǔn)數(shù)關(guān)聯(lián)式進(jìn)行推導(dǎo)并給出計算公式。在功率特性研究的基礎(chǔ)上,選取四種螺帶式攪拌槳對粉體混合性能進(jìn)行研究,探討了轉(zhuǎn)速,填料高度對粉體混合性能的影響狀況,并通過ANOVA分析法研究徑向與軸向截面粉體的混合性能,對四種攪拌槳的混合性能進(jìn)行了定量描述并對每種槳型的適用環(huán)境做了簡單總結(jié)。實驗結(jié)果表明攪拌功率與轉(zhuǎn)速幾乎呈現(xiàn)線性關(guān)系,即粉體體系的扭矩值與轉(zhuǎn)速無關(guān)；填料高度增大,攪拌功率與扭矩值均增大,而對于同一槳型,攪拌功率隨著轉(zhuǎn)速的增加,其增加的幅度明顯增加,探究了P／N與填料高度的關(guān)系,發(fā)現(xiàn)幾乎呈現(xiàn)線性關(guān)系,但是攪拌槳不同,比例系數(shù)不同。通過對粉體混合實驗,發(fā)現(xiàn)轉(zhuǎn)速,填料高度都是粉體混合的重要參數(shù),轉(zhuǎn)速越快,達(dá)到混合要求的混合時間越短；較低的填料高度可以實現(xiàn)快速高效的混合,但是不同的槳型影響效果不同,剪切作用強的攪拌槳,填料高度的影響作用較弱。通過對四種攪拌槳混合速率的定量計算,發(fā)現(xiàn)槳型四的混合性能最好,可以適用于全槽的混合,槳型二的混合速率最大,混合性能最差,不適合大型生產(chǎn)設(shè)備的應(yīng)用,槳型一與槳型三的混合速率相差不大,但槳型一適用于靠近壁面處的較低轉(zhuǎn)速的混合,槳型三適用于靠近壁面處的較高轉(zhuǎn)速的混合。本課題給出的結(jié)果可以作為指導(dǎo)開發(fā)合適的螺帶式粉體混合設(shè)備。
[Abstract]:In this paper, the power characteristics and mixing properties of powder agitation were studied in a transparent plexiglass tank with a standard elliptical bottom of 0.476 m in diameter.In the course of the experiment, using resin particles and glass beads as raw materials, the changing law of powder stirring power was studied by changing the combination of agitator, packing height and rotating speed, and the correlation formula of power criterion was deduced and the calculation formula was given.On the basis of the study of power characteristic, four kinds of propeller were selected to study the mixing performance of powder, and the influence of rotating speed and packing height on the mixing performance of powder was discussed.The mixing performance of radial and axial cross-section powder is studied by ANOVA analysis. The mixing performance of four kinds of impellers is quantitatively described and the suitable environment for each type of impeller is simply summarized.The relationship between P / N and packing height was found to be almost linear, but the ratio coefficient was different with different impeller.Through the powder mixing experiment, it is found that the speed and the height of the filler are the important parameters of powder mixing, the faster the speed, the shorter the mixing time, and the lower the height of the filler can be, the faster and more efficient the mixing can be.However, the effects of different propeller types are different, and the effect of packing height is weak for the strong shear impeller.Through the quantitative calculation of the mixing rate of four kinds of impellers, it is found that the four propellers have the best mixing performance and can be applied to the mixing of the whole tank. The mixing rate of the propeller type 2 is the largest, and the mixing performance is the worst, which is not suitable for the application of the large production equipment.The mixing rate of propeller type 1 and propeller type 3 is not different, but propeller type one is suitable for mixing at lower rotational speed near the wall, and propeller type three is suitable for mixing at higher speed near the wall.The results of this paper can be used as a guide to develop a suitable screw belt powder mixing equipment.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ027

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 馬青山,馮連芳,顧雪萍,王凱;臥式單軸粉體攪拌反應(yīng)器的攪拌功率[J];高�；瘜W(xué)工程學(xué)報;1999年01期

2 黃雄斌,閆憲斌,施力田,祝鈴鈺;固液攪拌槽內(nèi)液相速度的分布[J];化工學(xué)報;2002年07期

3 謝剛,李霞,田國輝,臧福學(xué);固體物料混合過程中混合度的研究[J];黑龍江大學(xué)自然科學(xué)學(xué)報;2003年02期

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本文編號：1728633