本文選題：黃河泥沙分離　切入點(diǎn)：斜板間距　出處：《內(nèi)蒙古農(nóng)業(yè)大學(xué)》2014年碩士論文

【摘要】：水資源分布不均勻和農(nóng)業(yè)灌溉用水之間的矛盾制約著社會(huì)的發(fā)展,充分利用灌區(qū)周邊各種水資源是解決矛盾的最有效方法。黃河是我國北方農(nóng)業(yè)主要灌溉水源,然而黃河水泥沙含量大,不能直接用滴灌系統(tǒng)灌溉農(nóng)田,因此急需我們?nèi)パ芯績艋吆沉克难b置。 本文結(jié)合前期初步試驗(yàn)結(jié)果,深入研究多級斜板分離裝置在改變斜板間距組合和角度后對泥沙分離效率的影響；在不同濃度和流量的動(dòng)水試驗(yàn)條件下,分析各級分離裝置溢流濃度、泥沙分離率和中值粒徑；采用正交試驗(yàn)、方差分析和極差分析本裝置各個(gè)試驗(yàn)參數(shù)的最優(yōu)組合,為以后制作大流量的分沙裝置提供借鑒。 本次試驗(yàn)主要研究內(nèi)容有：首先根據(jù)斜板傾角與泥沙受力情況計(jì)算出斜板理論分離率為65.1%,要小于試驗(yàn)結(jié)果中絕大部分的總分離率,驗(yàn)證了該裝置對于泥沙分離的優(yōu)越性；其次用四種斜板組合分別進(jìn)行不同濃度和流量的試驗(yàn),確定出第一級、第二級和第三級斜板間距分別為8mm、5mm和3mm為該裝置最優(yōu)斜板組合,并且調(diào)整斜板寬方向傾斜角度,得到斜板在長寬方向分別為45°和60°有利于泥沙沉降；最后采用正交試驗(yàn)、方差分析和極差分析研究了裝置各參數(shù)對分離率的影響,結(jié)果得出影響分離率參數(shù)主次排列為斜板間距、進(jìn)流口流量和泥沙濃度。 進(jìn)行全部內(nèi)容概括,在分析得出結(jié)論的同時(shí),利用相似原理對裝置進(jìn)行理論擴(kuò)大,計(jì)算出設(shè)備各個(gè)參數(shù)相應(yīng)放大后的值,以期在將來制作大流量分離裝置時(shí)提供借鑒,并對有待深入研究的問題進(jìn)行探討。
[Abstract]:The contradiction between the uneven distribution of water resources and agricultural irrigation water restricts the development of society. The most effective way to solve the contradiction is to make full use of all kinds of water resources around irrigation areas.The Yellow River is the main irrigation water source for agriculture in the north of China. However, the content of cement sediment in the Yellow River is so large that the drip irrigation system cannot be directly used to irrigate farmland. Therefore, it is urgent for us to study the equipment for purifying high sediment content water.Based on the preliminary experimental results, this paper studies the effect of multi-stage inclined plate separation device on sediment separation efficiency after changing the combination and angle of inclined plate spacing, and under the conditions of dynamic water test with different concentration and flow rate.The overflow concentration, sediment separation rate and median particle size of each stage separation device are analyzed, and the optimum combination of each test parameter of the device is analyzed by orthogonal test, variance analysis and range analysis, which provides a reference for making the sand separation device with large discharge in the future.The main contents of this experiment are as follows: firstly, the theoretical separation rate of inclined plate is 65.1, which is smaller than the total separation rate of most of the test results, according to the inclined angle of inclined plate and the stress of sediment, which verifies the superiority of the device for sediment separation.Secondly, the experiments of different concentration and flow rate were carried out with four kinds of sloping plate combinations, and it was determined that the first stage, the second stage and the third stage were 8 mm / 5 mm and 3mm, respectively, as the optimal inclined plate combination, and the inclined angle of the wide direction of the inclined plate was adjusted.The results show that 45 擄and 60 擄of inclined plate in the direction of length and width are favorable to sediment sedimentation. Finally, the effects of the parameters of the device on the separation rate are studied by orthogonal test, variance analysis and range analysis.The results show that the main and secondary parameters affecting the separation rate are inclined plate spacing, inlet discharge and sediment concentration.The whole content is summarized, and at the same time, the principle of similarity is used to expand the theory of the device and calculate the corresponding magnified value of each parameter of the equipment, in order to provide reference for the manufacture of the large flow separation device in the future.The problems to be further studied are also discussed.
【學(xué)位授予單位】：內(nèi)蒙古農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV149

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