【摘要】：南疆地區(qū)降水稀少,水資源匱乏,灌區(qū)排出的鹽堿水不僅造成水資源浪費,而且引發(fā)一系列生態(tài)環(huán)境問題。因此,南疆鹽堿水資源化利用的研究具有十分重要的意義。論文根據(jù)排堿渠中鹽堿水的分層特點,發(fā)明了基于浮力原理的物理分流裝置,其兩個浮力球帶動左右閘門工作,可將排堿渠上層低鹽度水體和下層較高鹽度的水體分流。浮力球和閘門分別采用耐蝕性好的中空玻璃微珠復合材料與蒙乃爾合金。整個裝置具有結構簡單、造價低廉的優(yōu)點。發(fā)明了自動控制鹽水分流裝置,對物理分流裝置作了改進,以提高鹽堿水分流的精度,并實現(xiàn)完全自動化。用兩個傳感器對排堿渠中上下層鹽堿水的鹽度分別進行實時監(jiān)測,然后驅動左右閘門上升和下降,從而使得符合設定閾值要求的鹽堿水流過,進而達到上下層鹽堿水分流的目的。引入鹽度控制方程和邊界條件的自定義函數(shù)(UDF),用FLUENT軟件對鹽堿水分流過程進行數(shù)值模擬,結果表明,分流裝置確能將不同鹽度的水體分流。上導流槽得到低鹽度水體,下導流槽得到較高鹽度水體。分流的效率和效果取決于裝置尺寸、分層流流速和鹽度分布等因素。應根據(jù)實際情況進行調整和優(yōu)化。
[Abstract]:In southern Xinjiang, precipitation is scarce and water resources are scarce. Saline-alkali water discharged from irrigated areas not only causes waste of water resources, but also causes a series of ecological and environmental problems. Therefore, the study on the utilization of saline-alkali water in southern Xinjiang is of great significance. According to the delamination characteristics of saline-alkali water in the drainage canal, a physical distributary device based on buoyancy principle is invented in this paper. The two buoyancy spheres drive the work of the left and right gates, which can separate the upper low salinity water body of the drainage canal from the lower higher salinity water body. The buoyancy ball and gate were made of hollow glass bead composite and Monel alloy with good corrosion resistance respectively. The whole device has the advantages of simple structure and low cost. An automatic control brine shunt device is invented and the physical shunt device is improved to improve the accuracy of saline-alkali water flow and to realize complete automation. Two sensors are used to monitor the salinity of the upper and lower layers of saline-alkali water in the drainage channel in real time, and then drive the left and right gates to rise and decrease, thus making the saline-alkali water flow through the required threshold. Then the purpose of saline-alkali water flow in the upper and lower layers is achieved. The salinization control equation and the self-defined function of boundary condition (UDF), are introduced to simulate the saline-alkali water diversion process by using FLUENT software. The results show that the distributary device can actually distribute the water body with different salinity. Low salinity water was obtained in the upper channel and higher salinity water in the lower channel. The efficiency and effect of the distributary depend on the size of the unit, the velocity of stratified flow and the distribution of salinity. Should be adjusted and optimized according to the actual situation.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TV213.9

【參考文獻】

相關期刊論文 前10條

1 楊軍;孫兆軍;劉吉利;馬飛;;脫硫石膏糠醛渣對新墾龜裂堿土的改良洗鹽效果[J];農業(yè)工程學報;2015年17期

2 吳軍虎;陶汪海;王海洋;王全九;;羧甲基纖維素鈉對土壤團粒結構及水分運動特性的影響[J];農業(yè)工程學報;2015年02期

3 加孜拉·阿山;王修貴;姚宛艷;;新疆土壤鹽堿化治理技術初步研究[J];節(jié)水灌溉;2011年11期

4 張金龍;張清;王振宇;;天津濱海鹽堿土灌排改良工程技術參數(shù)估算方法[J];農業(yè)工程學報;2011年08期

5 張江輝;白云崗;張勝江;曹偉;;兩種化學改良劑對鹽漬化土壤作用機制及對棉花生長的影響[J];干旱區(qū)研究;2011年03期

6 馬鳳嬌;譚莉梅;劉慧濤;于淑會;劉宏娟;元媛;劉金銅;;河北濱海鹽堿區(qū)暗管改堿技術的降雨有效性評價[J];中國生態(tài)農業(yè)學報;2011年02期

7 王玉江;吳濤;吳杰;;磷石膏改良鹽堿地的研究進展[J];安徽農業(yè)科學;2008年17期

8 包蕓;任杰;;伶仃洋鹽度高度層化現(xiàn)象及鹽度鋒面的研究[J];水動力學研究與進展(A輯);2005年06期

9 魏云杰;許模;;新疆土壤鹽漬化成因及其防治對策研究[J];地球與環(huán)境;2005年S1期

10 王金滿,楊培嶺,張建國,石懿;脫硫石膏改良堿化土壤過程中的向日葵苗期鹽響應研究[J];農業(yè)工程學報;2005年09期

，

本文編號：2163246