本文選題：垃圾 + 富氧焚燒　； 參考：《華中科技大學(xué)》2015年碩士論文

【摘要】：垃圾焚燒處理是實(shí)現(xiàn)無害化、減量化和資源化的最有效手段之一。隨著環(huán)境問題的日益凸顯,愈發(fā)嚴(yán)格的環(huán)保標(biāo)準(zhǔn)將會(huì)大大限制常規(guī)垃圾焚燒技術(shù)的發(fā)展,因此,開發(fā)一種新型潔凈高效的垃圾焚燒技術(shù)將是垃圾焚燒行業(yè)的必然發(fā)展趨勢(shì)。本文基于CFD技術(shù)進(jìn)行了垃圾爐排焚燒爐富氧焚燒技術(shù)的開發(fā)以及富氧焚燒注氧器的優(yōu)化設(shè)計(jì)。首先,通過數(shù)值模擬對(duì)垃圾焚燒爐在常規(guī)空氣焚燒、富氧焚燒無煙氣再循環(huán)、富氧焚燒有煙氣再循環(huán)三種工況下的重要信息進(jìn)行預(yù)測(cè),結(jié)果顯示,富氧焚燒有煙氣再循環(huán)時(shí),可燃?xì)怏w與氧氣混合良好;爐內(nèi)溫度分布均勻,燃燒更完全;焚燒爐內(nèi)的流場(chǎng)組織較好,采用煙氣再循環(huán)有效的提高了煙氣在爐內(nèi)的停留時(shí)間。其次,應(yīng)用數(shù)值模擬對(duì)富氧焚燒垃圾爐排焚燒爐進(jìn)行局部優(yōu)化研究,結(jié)果表明:在合理范圍內(nèi),適當(dāng)提高循環(huán)煙氣量的比例,調(diào)整前后墻循環(huán)煙氣量的配比和改變前后墻噴嘴角度的布置,均可獲得更好的流場(chǎng)分布和燃燒傳熱效果。再次,應(yīng)用CFD方法對(duì)不同類型的注氧裝置的速度場(chǎng)、溫度場(chǎng)、濃度場(chǎng)等進(jìn)行研究,結(jié)果表明:環(huán)式注氧器達(dá)到了很好的混合效果,且阻力壓降最小,相比噴管式注氧器和擴(kuò)壓式注氧器兩種類型更能滿足工程實(shí)際需要。最后,研究調(diào)節(jié)部分結(jié)構(gòu)參數(shù)對(duì)混合氣體溫度分布、速度分布和濃度分布等的影響,實(shí)現(xiàn)對(duì)環(huán)式注氧器的結(jié)構(gòu)優(yōu)化。結(jié)果表明:注氧環(huán)直徑取0.7071D,空氣管道長度達(dá)到1.4D,注氧環(huán)外孔取0.28d,內(nèi)孔取0.4d時(shí)注氧效果最好。
[Abstract]:Incineration is one of the most effective methods to realize harmless, minimization and reuse. With the increasingly prominent environmental problems, more stringent environmental standards will greatly limit the development of conventional MSW incineration technology. Therefore, the development of a new clean and efficient MSW incineration technology will be the inevitable development trend of MSW incineration industry. In this paper, the development of oxygen-enriched incineration technology and the optimization design of oxygen-enriched incinerator for MSW grate incinerator are carried out based on CFD technology. Firstly, the important information of MSW incinerator under conventional air incineration, oxygen-enriched incineration without flue gas recirculation and oxygen-enriched incineration with flue gas recirculation is predicted by numerical simulation. The results show that when oxygen-enriched incineration has flue gas recirculation, The combustible gas is well mixed with oxygen; the temperature distribution in the furnace is uniform and the combustion is more complete; the flow field in the incinerator is well organized and the residence time of the flue gas in the furnace is effectively increased by flue gas recirculation. Secondly, the local optimization of the waste grate incinerator for oxygen-enriched incineration is studied by numerical simulation. The results show that the proportion of circulating flue gas is properly increased within a reasonable range. Better flow field distribution and combustion heat transfer can be obtained by adjusting the ratio of circulating flue gas and changing the arrangement of nozzle angle. Thirdly, the velocity field, temperature field and concentration field of different types of oxygen injection devices are studied by CFD method. The results show that the ring oxygen injector achieves a good mixing effect, and the resistance pressure drop is minimum. Compared with two types of nozzle oxygen injector and diffuser oxygen injector, it can meet the practical engineering needs more. Finally, the effects of adjusting some structural parameters on the temperature distribution, velocity distribution and concentration distribution of the mixed gas are studied to optimize the structure of the annular oxygen injector. The results show that the oxygen injection effect is the best when the diameter of oxygen injection ring is 0.7071D, the length of air pipe is 1.4 D, the outer hole of oxygen injection ring is 0.28 days, and the inner hole is 0.4 days.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X705

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李龍君;馬曉茜;黃闊;馮超;;一、二次風(fēng)配比對(duì)75t/h循環(huán)流化床的影響[J];能源環(huán)境保護(hù);2013年05期

2 林海;馬曉茜;;大型城市生活垃圾焚燒爐燃盡風(fēng)的優(yōu)化布置[J];華東電力;2011年11期

3 賴志q，

本文編號(hào)：1780012