【摘要】：當(dāng)前環(huán)境問題越來越嚴(yán)重,引發(fā)了公眾的持續(xù)關(guān)注。近年來,許多大型火電廠、水泥廠、輪胎廠等污染企業(yè)大量排放粉塵及各種污染物,導(dǎo)致空氣中污染物濃度過大,嚴(yán)重影響大氣質(zhì)量。因此,我國對(duì)大氣污染污染物排放標(biāo)準(zhǔn)也越來越高,各大廠家逐漸加大對(duì)除塵器的研發(fā)和投入。旋風(fēng)除塵器和濾筒除塵器作為目前使用比較廣泛的兩種除塵器,單一使用往往難以滿足生產(chǎn)排放需要。旋風(fēng)除塵器雖然具有結(jié)構(gòu)簡單,制造方便等優(yōu)點(diǎn),但對(duì)細(xì)微粉塵的除塵效果差強(qiáng)人意;濾筒除塵器除塵效率高,但普遍存在的糊袋問題嚴(yán)重影響了濾筒的使用壽命。雖然可以將多級(jí)除塵器并聯(lián)使用達(dá)到除塵目的,但也存在設(shè)備占地面積大,造價(jià)高等問題。因此對(duì)旋風(fēng)濾筒復(fù)合除塵器的研究具有一定的意義。通過借助Ansys、Fluent等模擬軟件對(duì)復(fù)合除塵器內(nèi)部復(fù)雜的氣固兩相流動(dòng)進(jìn)行模擬分析,探索影響復(fù)合除塵器除塵效率的因素,并對(duì)除塵器的結(jié)構(gòu)進(jìn)行優(yōu)化設(shè)計(jì)。研究發(fā)現(xiàn),旋風(fēng)濾筒復(fù)合除塵器在氣流分散均勻性以及上升氣速方面存在較大缺陷,通過對(duì)復(fù)合除塵器結(jié)構(gòu)的優(yōu)化以及加裝導(dǎo)流元件的形式,對(duì)上述問題有了較好的改善。
[Abstract]:The current environmental problems are becoming more and more serious, which has aroused the public's continuous concern. In recent years, a large number of polluting enterprises, such as power plants, cement plants and tire factories, have discharged a large amount of dust and various pollutants, resulting in excessive concentration of pollutants in the air, which seriously affects the air quality. Therefore, the emission standards of atmospheric pollutants in China are higher and higher. Cyclone precipitator and filter drum precipitator are two kinds of precipitators which are widely used at present. Although the cyclone dust collector has the advantages of simple structure and convenient manufacture, the dust removal effect on fine dust is not satisfactory. The filter drum dust collector has a high dust removal efficiency, but the widespread paste bag problem seriously affects the service life of the filter tube. Although the multistage dust collector can be used in parallel to achieve the purpose of dust removal, there are some problems such as large area of equipment and high cost. Therefore, the study of cyclone filter composite dust collector has certain significance. The complex gas-solid two-phase flow in composite precipitator was simulated and analyzed by means of Ansys,Fluent and other simulation softwares. The factors affecting the dust removal efficiency of composite precipitator were explored and the structure of the dust collector was optimized. It is found that the cyclone filter tube composite precipitator has great defects in the uniformity of air flow dispersion and the rising gas velocity. By optimizing the structure of the composite dust collector and adding the form of diversion elements, the above problems have been improved.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X701.2

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