本文關(guān)鍵詞：復(fù)合齒形微氣泡發(fā)生裝置的設(shè)計(jì)與實(shí)驗(yàn)研究　出處：《北京化工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 曝氣 微氣泡發(fā)生裝置 組合齒形 氣液兩相流 實(shí)驗(yàn)研究

【摘要】：隨著城鎮(zhèn)人口增加,城市污水處理要求逐步提高,為符合國(guó)家排放標(biāo)準(zhǔn),污水處理廠對(duì)污水進(jìn)行曝氣處理,提升水體含氧量,為生化分解提供有氧環(huán)境。微氣泡發(fā)生裝置是應(yīng)用在污水處理過(guò)程中曝氣環(huán)節(jié)的一種水力設(shè)備。相比于鼓風(fēng)、表面、射流等現(xiàn)存曝氣方式,微氣泡曝氣方式具有氧利用率高,能耗低,低污染等特點(diǎn)。由于現(xiàn)存微氣泡理論和可借鑒的設(shè)計(jì)經(jīng)驗(yàn)不足,螺旋式微氣泡發(fā)生裝置的研發(fā)一直停留在變工況不變?cè)O(shè)備結(jié)構(gòu)的階段。針對(duì)這一問(wèn)題,本文提出一種不同螺紋復(fù)合齒形的新型微氣泡發(fā)生裝置。從理論研究和實(shí)驗(yàn)方面展開(kāi)工作,具體內(nèi)容如下：(1)研究微氣泡發(fā)生裝置的基本原理,分析影響裝置性能的設(shè)計(jì)參數(shù)�；诂F(xiàn)存理論指導(dǎo)相似設(shè)備設(shè)計(jì),設(shè)計(jì)并搭建復(fù)合齒形微氣泡發(fā)生裝置實(shí)驗(yàn)平臺(tái)。(2)通過(guò)Workbench進(jìn)行幾何建模,使用Fluent軟件對(duì)微氣泡發(fā)生裝置全流域進(jìn)行水力性能模擬和曝氣性能分析。(3)通過(guò)復(fù)合齒形微氣泡發(fā)生裝置實(shí)驗(yàn)平臺(tái),分別對(duì)三角形、半圓形及組合齒形的微氣泡發(fā)生裝置在不同真空度下的曝氣性能進(jìn)行了研究。通過(guò)以上工作,得出關(guān)于復(fù)合齒形微氣泡發(fā)生裝置的相關(guān)結(jié)論如下：(1)提出的新型微氣泡發(fā)生裝置具有良好曝氣能力,水力性能符合傳統(tǒng)葉輪泵揚(yáng)程曲線。經(jīng)過(guò)實(shí)驗(yàn)驗(yàn)證,該設(shè)備能夠作為微氣泡發(fā)生裝置應(yīng)用于污水曝氣工藝環(huán)節(jié)當(dāng)中。(2)復(fù)合齒形能夠整合各單一齒形泵送性能特點(diǎn)。相比于單一齒形微氣泡發(fā)生裝置,復(fù)合齒形靈活性高,拆裝方便,能夠根據(jù)不同工況及泵送要求更換轉(zhuǎn)子和定子組合,達(dá)到一套裝置多用的目的。(3)相比于單一齒形微氣泡發(fā)生裝置,同樣的曝氣要求下,復(fù)合齒形微氣泡發(fā)生裝置能夠?qū)⑵貧庑侍岣?5%左右,減少了污水處理的整體耗能。復(fù)合齒形能夠提高曝氣設(shè)備氣流的震蕩性,對(duì)氣液兩相間氧傳質(zhì)具有提升作用。
[Abstract]:With the increase of urban population, the requirement of urban sewage treatment is gradually raised. In order to meet the national discharge standards, sewage treatment plant aeration treatment of sewage, enhance the water oxygen content. Microbubble generator is a kind of hydraulic equipment used in aeration process of sewage treatment. Compared with existing aeration methods such as blast, surface, jet and so on. Microbubble aeration mode has the characteristics of high oxygen utilization, low energy consumption, low pollution and so on. The research and development of spiral micro bubble generator has been staying at the stage of constant equipment structure under variable working conditions. In this paper, a new type of micro bubble generating device with different screw thread composite tooth profile is proposed. The basic principle of the micro bubble generator is studied from the aspects of theoretical research and experiment, as follows: (1) study the basic principle of the micro bubble generating device. The design parameters that affect the performance of the device are analyzed. The design of similar equipment is guided based on the existing theory. Design and build the experimental platform of composite toothed micro bubble generator. 2) geometric modeling is carried out by Workbench. Fluent software was used to simulate the hydraulic performance and aeration performance of the whole basin of the micro-bubble generator. The aeration performance of semicircular and combined tooth shaped micro bubble generator under different vacuum degree was studied. The conclusions of this paper are as follows: (1) the new micro bubble generator has good aeration capacity and its hydraulic performance accords with the traditional impeller pump lift curve. The equipment can be used as a micro-bubble generator in the process of wastewater aeration. The composite tooth profile can integrate the characteristics of the pump performance of each single tooth shape, compared with the single-tooth micro-bubble generating device. The combination of rotor and stator can be changed according to different working conditions and pump requirements, which can achieve the purpose of multi-use of a set of devices. It is compared with a single toothed micro-bubble generator. Under the same aeration requirement, the aeration efficiency can be increased by about 15%, and the overall energy consumption of wastewater treatment can be reduced. The composite tooth profile can improve the turbulence of aeration equipment. It can enhance the oxygen mass transfer between gas and liquid phase.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 李龍濱;;羅茨鼓風(fēng)機(jī)在污水處理中的應(yīng)用及維護(hù)[J];廣西輕工業(yè);2008年09期

2 溫國(guó)強(qiáng);李翠丹;紀(jì)傳偉;張艷芳;劉治猛;;純氧曝氣在城市污水處理中的應(yīng)用前景[J];廣東化工;2012年16期

3 王春林;張浩;彭娜;趙佰通;鄭海霞;;三角形迷宮螺旋泵內(nèi)部流場(chǎng)數(shù)值計(jì)算及試驗(yàn)[J];排灌機(jī)械;2009年02期

4 王少艮;張會(huì)敏;;造紙廢水處理工程曝氣器優(yōu)選[J];中國(guó)造紙;2013年02期

5 侯玉良;;氧化溝曝氣設(shè)備的性能比較和發(fā)展方向[J];知識(shí)經(jīng)濟(jì);2013年20期

相關(guān)碩士學(xué)位論文 前1條

1 李輝;基于CFD方法的全方向推進(jìn)器水動(dòng)力性能研究[D];哈爾濱工程大學(xué);2009年

，

本文編號(hào)：1412263