隨著我國城鎮(zhèn)污水處理廠的大規(guī)模建設(shè)，其產(chǎn)生的污泥已成為 新的環(huán)境污染源，這些污泥具有高含水率等問題，所以對這些污泥的 深度脫水成為人們重點(diǎn)研究的課題之一。研究發(fā)現(xiàn)，對城市污泥經(jīng)藥 劑改性后，用廂式隔膜壓濾機(jī)對污泥進(jìn)行深度脫水處理，能形成含水 率低的污泥濾餅，實現(xiàn)污泥減量化。本文應(yīng)用模擬仿真與實驗相結(jié)合 的方法，對廂式隔膜壓濾機(jī)的污泥過濾過程及過濾特性進(jìn)行了深入的 研究。主要工作如下：

1、建立廂式隔膜壓濾機(jī)單個濾室的物理模型，在CFD仿真軟件 Fluent中采用標(biāo)準(zhǔn)七一占模型、混合模型、多孔介質(zhì)模型等建立單個 濾室內(nèi)污泥固液兩相流場的數(shù)學(xué)模型，為固液兩相流進(jìn)行模擬仿真提 供條件、應(yīng)用上述建立的模型對廂式隔膜壓濾機(jī)單個濾室內(nèi)固液兩相 流場的速度分布、壓力分布、濃度場分布進(jìn)行模擬仿真，得到了濾餅 兩端壓降變化規(guī)律、濾餅的形成規(guī)律以及濾室內(nèi)污泥兩相流的基本流 動規(guī)律等；

3、不同過濾壓力下的仿真分析。研究了不同過濾壓力下濾室中 的速度分布以及形成濾餅的含水率的變化規(guī)律；

4、不同進(jìn)料方式下的仿真分析。對比污泥由濾室中心進(jìn)料方式 與由濾室上部進(jìn)料方式，研究其濾餅形成規(guī)律以及形成濾餅的均勻 性，結(jié)果表明污泥由濾室中心進(jìn)料方式優(yōu)于由濾室上部進(jìn)料方式；

5、最佳濾室厚度的確定。研究了不同濾室厚度下形成的濾餅含 水率以及單位時間濾餅量產(chǎn)率，綜合分析發(fā)現(xiàn)本研究模型的最佳濾室 厚度為12mm；

6、對廂式隔膜壓濾機(jī)進(jìn)行過濾性能實驗，并將得到的實驗結(jié)果 與仿真結(jié)果進(jìn)行對比，發(fā)現(xiàn)最大誤差在10％以內(nèi)，驗證了仿真結(jié)果的 正確性；通過終止進(jìn)料后進(jìn)行壓榨脫水處理，使得濾餅的含水率進(jìn)一 步降低，同時，該過程也找到了合適的壓榨起始時間點(diǎn)。 論文的研究結(jié)果可用于指導(dǎo)廂式隔膜壓濾機(jī)的設(shè)計和使用。

關(guān)鍵詞：廂式隔膜壓濾機(jī)；濾餅含水率；數(shù)值模擬；過濾壓力；濾室

Abstract：晰m the large．scale construction of urban sewage treatment plant in our COUlltry,sludge generated has become a new source of environmental pollution，which have a high moisture content sludge and other issues，SO the depth of the sludge dewatering become one of these key research topics．111e study found that when the agents modified of urban sludge finished，sludge dewatering depth by Van membrane filter press sludge Can form cake with low moisture content，thus achieving sludge reduction．In this paper,sludge filtration process and filter characteristics of filtration chamber in Van membrane filter press were studied by the method of the numerical simulation combined with experimental validation．The main work is as follows： Firstly,the paper establishes the physical model of single filtration chamber in Van membrane filter press．within fluent of the FLUENT simulation software，using the standard k-s model，hybrid model and porous media models，the mathematical model of the solid—liquid two．phase flow in single filtration chamber of Van membrane filter press has been built，which provided the conditions for the solid-liquid two-phase flow numerical simulation． Secondly,application of the above physical and mathematical models，speed distribution，pressure distribution，concentration field distribution in two-phase flow field of single filtration chamber in Van membrane filter press have simulated and got the changes law in pressure drop across the filter cake，analysed the pattern of filter cake was formed and the basic flow law of sludge two—phase field in filtration chamber, etc．； Thirdly,simulation analysis under different filtration pressures． studing the law of velocity distribution and the moisture content of cake formed under different filtration pressure； Fourth，simulation analysis under different feeding methods． Comparison of sludge from the filter chamber center feeding mode and the upper feeding mode，studying the formation of the cake and the uniformity of cake formed．The results show that the center feed way is better than the upper feed way． FifHl，determine the optimum thickness of filter chamber．studying the moisture content of cake formed and the cake volume yield per unit of time under different thickness of the filter chamber,comprehensive analysis to select 1 2ram as the best filter chamber thickness of the research modle； Sixth，F(xiàn)ilter performance test is taken on Van membrane filter press， experimental results obtained are compared with the simulation results， the maximum error iS less than 1 0％，to verify the correctness of the simulation；squeeze dewatering after feed finished，SO further reducing the moisture content of the cake，by experiment to find the right time as the press start point． T】。 search results l research Can guide guide th,de：”g the desima and use of the vailIllS membrane fiiter press． This article has forty—one pictures，seven tables，seventy．one references．