發(fā)布時間：2019-06-02 23:13

【摘要】：近年來,我國的廢舊輪胎數(shù)量在逐年上升,如果不加以回收利用,那么不僅造成資源的浪費,還會帶來一系列環(huán)境問題;同時,隨著車輛的增加,人們對路面性能的要求也在不斷提高,而橡膠瀝青則可以很好地解決這兩個問題。因此,本文對橡膠瀝青制備技術(shù)及其生產(chǎn)設(shè)備進(jìn)行了研究,具體研究的內(nèi)容及思路如下:(1)對橡膠瀝青的性能、影響因素及改性機(jī)理進(jìn)行分析研究,確定橡膠瀝青制備技術(shù)中最佳的工藝參數(shù);(2)介紹了橡膠瀝青的兩種基本生產(chǎn)工藝,并通過對濕法工藝中的機(jī)械攪拌法和高速剪切法進(jìn)行分析比較,確定采用機(jī)械攪拌法;(3)根據(jù)制定的生產(chǎn)工藝以及得到的相關(guān)工藝參數(shù),以生產(chǎn)率為20t/h的橡膠瀝青設(shè)備為例,對其關(guān)鍵設(shè)備進(jìn)行設(shè)計計算,確定結(jié)構(gòu)參數(shù),并對反應(yīng)罐和發(fā)育罐進(jìn)行熱平衡計算;(4)通過計算機(jī)數(shù)值模擬技術(shù)對攪拌罐和發(fā)育罐內(nèi)的流場進(jìn)行仿真分析,首先對比分析單、雙層攪拌葉片對攪拌效果的影響,得出雙層攪拌葉片在高液位區(qū)的攪拌效果要明顯優(yōu)于單層攪拌葉片的攪拌效果,然后以雙層攪拌葉片的布局形式為例,分析不同攪拌轉(zhuǎn)速對罐內(nèi)流場的影響效果,得出攪拌器轉(zhuǎn)速越高,物料混合效果越好。本文通過對橡膠瀝青制備技術(shù)的研究,為該生產(chǎn)設(shè)備的設(shè)計提供一定的理論依據(jù),并通過CFD數(shù)值模擬技術(shù),為攪拌罐和發(fā)育罐提出了優(yōu)化改進(jìn),因此本文的研究具有一定的理論和實際意義。
[Abstract]:In recent years, the number of waste tyres in China is increasing year by year. If it is not recycled, it will not only cause the waste of resources, but also bring a series of environmental problems. At the same time, with the increase of vehicles, people's requirements for pavement performance are also improving, and rubber asphalt can solve these two problems. Therefore, the preparation technology and production equipment of rubber asphalt are studied in this paper. the contents and ideas of the specific research are as follows: (1) the properties, influencing factors and modification mechanism of rubber asphalt are analyzed and studied. The optimum technological parameters in the preparation technology of rubber asphalt were determined. (2) two basic production processes of rubber asphalt are introduced, and the mechanical mixing method and high speed shear method in wet process are analyzed and compared, and the mechanical mixing method is determined. (3) according to the production process and the related process parameters, taking the rubber asphalt equipment with productivity of 20t/h as an example, the key equipment is designed and calculated, and the structural parameters are determined. The heat balance of the reaction tank and the development tank was calculated. (4) the flow field in the mixing tank and the development tank is simulated and analyzed by computer numerical simulation technology. firstly, the influence of single and double layer stirring blades on the stirring effect is compared and analyzed. It is concluded that the stirring effect of the double-layer stirring blade in the high liquid level region is obviously better than that of the single-layer stirring blade. Then, taking the layout of the double-layer stirring blade as an example, the influence of different stirring speed on the flow field in the tank is analyzed. It is concluded that the higher the rotating speed of the agitator, the better the mixing effect of the material. In this paper, the preparation technology of rubber asphalt is studied to provide a certain theoretical basis for the design of the production equipment, and through CFD numerical simulation technology, the optimization and improvement of mixing tank and development tank are put forward. Therefore, the research of this paper has certain theoretical and practical significance.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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本文編號：2491491