本文選題：微細(xì)粉塵 + 高壓水霧��； 參考：《武漢工程大學(xué)》2015年碩士論文

【摘要】：近年來(lái),隨著我國(guó)工業(yè)飛速發(fā)展,越來(lái)越多的工業(yè)廢氣與汽車尾氣被產(chǎn)生并排放到大氣中,這些導(dǎo)致了大氣的嚴(yán)重污染。其中粉塵污染為大氣污染中較為種的部分。粉塵污染在我國(guó)非常嚴(yán)重,人們迫切需要一種能夠有效凈化空氣中懸浮粉塵顆粒的方案。在對(duì)粉塵污染進(jìn)行沉降中,較難以去除的是微細(xì)粉塵(PM2.5),這種粉塵由于粒徑小、重量輕,可以長(zhǎng)期懸浮于空氣中,并且很難被人工捕捉沉降。對(duì)此,人們做了大量研究,同時(shí)也提出了很多降塵方案。本問(wèn)研究課題在前人研究理論的基礎(chǔ)上,提出采用高壓細(xì)水霧除塵的方案。與傳統(tǒng)水霧除塵相比,課題方案由于采用高壓,可以使水霧荷電,荷電后的水霧對(duì)微細(xì)粉塵有更強(qiáng)的捕捉能力;并且在高壓下,水霧水粒直徑會(huì)更加小,這對(duì)微細(xì)粉塵的捕捉有積極作用。本研究課題將從以下幾個(gè)方面對(duì)課題展開(kāi)研究并得出結(jié)論:深入闡述大氣的嚴(yán)重污染程度,以及其對(duì)人體的危害來(lái)突出本課題對(duì)人類產(chǎn)生的積極作用。重點(diǎn)分析水壓與除塵效率之間的關(guān)系。首先通過(guò)研究水粒破碎數(shù)、水粒最終破碎直徑、水霧出射速度與噴霧水壓的關(guān)系,說(shuō)明水壓對(duì)設(shè)備的微細(xì)粉塵捕捉效率影響;再通過(guò)FLUENT驗(yàn)證噴霧水壓與水霧出射速度的關(guān)系;通過(guò)分析水霧水粒直徑與粉塵顆粒直徑的大小對(duì)去除微細(xì)粉塵的影響,得出最佳除塵水壓;最后解釋了高壓水霧的凝結(jié)與靜電作用,并且說(shuō)明高壓水霧除塵的優(yōu)點(diǎn)。充分驗(yàn)證了設(shè)備采用高壓的必要性,為設(shè)備方案的選擇奠定堅(jiān)實(shí)基礎(chǔ)。分析水霧除塵機(jī)理,闡明水霧水粒在除塵過(guò)程中的作用,理論驗(yàn)證高壓水霧除塵在理論上的可行性,為課題提供理論支持。設(shè)計(jì)設(shè)備結(jié)構(gòu),理清設(shè)備除塵過(guò)程;對(duì)設(shè)備各組成件進(jìn)行分析,通過(guò)計(jì)算,選擇合適水泵與電機(jī),并且選擇合適配件類型。對(duì)不同噴嘴孔徑與水壓下的除塵效率展開(kāi)實(shí)驗(yàn),驗(yàn)證上述各項(xiàng)的正確性,檢驗(yàn)設(shè)備除塵效率是否達(dá)到設(shè)計(jì)要求達(dá)到國(guó)家《環(huán)境空氣質(zhì)量標(biāo)準(zhǔn)》要求(日均濃度≤753?mg);對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行分析,提出設(shè)備的改進(jìn)方案,為設(shè)備的改進(jìn)做好準(zhǔn)備。
[Abstract]:In recent years, with the rapid development of industry in China, more and more industrial exhaust gas and automobile exhaust gas are produced and put into the atmosphere side by side, which leads to serious air pollution. Dust pollution is the part of air pollution. Dust pollution is very serious in China. In the deposition of dust pollution, it is more difficult to remove the fine dust (PM 2.5), which can be suspended in the air for a long time because of its small particle size and light weight, and is difficult to be captured and deposited manually. In this regard, people have done a lot of research, but also put forward a lot of dust control programs. On the basis of previous theories, a scheme of high pressure water mist dust removal is put forward in this paper. Compared with the traditional water mist dust removal, the project can make water mist charged by high pressure, the water mist after charging has stronger capture ability to fine dust, and under high pressure, the diameter of water mist water particle will be smaller. This has a positive effect on the capture of fine dust. This research will be carried out from the following aspects and draw a conclusion: the degree of serious atmospheric pollution and its harm to the human body to highlight the positive role of this topic to human beings. The relationship between water pressure and dust removal efficiency is analyzed. Firstly, by studying the relationship between water particle breaking number, water particle final crushing diameter, water mist ejection velocity and spray water pressure, the effect of water pressure on fine dust capture efficiency of equipment is explained, and the relationship between spray water pressure and water mist ejection velocity is verified by FLUENT. By analyzing the influence of water mist diameter and dust particle diameter on the removal of fine dust, the optimum water pressure of dust removal is obtained, and the condensation and electrostatic action of high pressure water mist are explained, and the advantages of high pressure water mist dust removal are explained. It fully verifies the necessity of using high voltage, and lays a solid foundation for the selection of equipment scheme. The mechanism of water mist dust removal is analyzed and the role of water mist particles in the process of dust collection is clarified. The theoretical feasibility of high pressure water mist dust removal is verified theoretically and the theoretical support is provided for the subject. Design the structure of the equipment, clear the dust removal process of the equipment, analyze the components of the equipment, select the appropriate pump and motor through calculation, and select the appropriate type of accessories. Experiments on dust removal efficiency under different nozzle orifices and water pressure have been carried out to verify the correctness of the above mentioned items. To test whether the dedusting efficiency of the equipment meets the design requirements (daily average concentration 鈮，

本文編號(hào)：1954385