本文選題：高溫?zé)煔膺^(guò)濾 + 陶瓷過(guò)濾器�。� 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：先進(jìn)發(fā)電系統(tǒng)以及清潔煤技術(shù),特別是先進(jìn)發(fā)電系統(tǒng),如整體煤氣化聯(lián)合循環(huán)發(fā)電系統(tǒng)(IGCC)和增壓流化床燃燒技術(shù)(PFBC)等,需要在高溫條件下有效地去除顆粒物,以保護(hù)下游渦輪機(jī)和滿足日趨嚴(yán)格的排放標(biāo)準(zhǔn),因此高溫氣體過(guò)濾已經(jīng)成為了這些系統(tǒng)中的一個(gè)基本組成部分。同時(shí),由于冶金行業(yè)PM2.5細(xì)顆粒物排放量大、腐蝕性強(qiáng)、傳統(tǒng)除塵工藝凈化率低等特點(diǎn),也急需發(fā)展高溫?zé)煔膺^(guò)濾深度凈化技術(shù)。陶瓷過(guò)濾器作為最具有發(fā)展?jié)摿Φ母邷責(zé)煔膺^(guò)濾設(shè)備,可用于清除煙氣中5μm以下的超細(xì)顆粒,且過(guò)濾效率可達(dá)99%以上,在化工、煉油、焚化、金屬冶煉、金屬回收工業(yè)以及先進(jìn)發(fā)電系統(tǒng)中具有廣泛的應(yīng)用前景。陶瓷過(guò)濾器作為高溫?zé)煔膺^(guò)濾系統(tǒng)中最主要的設(shè)備,當(dāng)含塵氣體進(jìn)入過(guò)濾器內(nèi),通過(guò)截留捕捉、慣性碰撞捕捉以及擴(kuò)散捕捉等過(guò)程,實(shí)現(xiàn)粉塵顆粒與氣體的高效分離。為了延長(zhǎng)陶瓷濾芯的使用壽命,同時(shí)保證過(guò)濾系統(tǒng)的正常運(yùn)行,需要對(duì)濾芯進(jìn)行清灰并使濾芯再生。和靜電除塵及布袋除塵相比,其過(guò)程更為復(fù)雜,因此針對(duì)多種影響因素開(kāi)展系統(tǒng)研究和設(shè)計(jì)至關(guān)重要。本文針對(duì)陶瓷過(guò)濾器的除塵和清灰再生過(guò)程,通過(guò)壁厚計(jì)算、熱力計(jì)算等,設(shè)計(jì)了一臺(tái)具有100m3/h處理能力,工作壓力為5kPa,工作溫度為550℃,并安裝有四根燭狀陶瓷濾芯的陶瓷過(guò)濾系統(tǒng),主要由進(jìn)氣系統(tǒng)、凈化系統(tǒng)、反吹清灰系統(tǒng)三大部分構(gòu)成。同時(shí)利用Geometry和Pro/Engineer軟件建立了陶瓷過(guò)濾器的三維模型,利用ICEM劃分網(wǎng)格,導(dǎo)入Fluent軟件,進(jìn)行了數(shù)值計(jì)算。數(shù)值模擬過(guò)程中選擇Realizable k-e模型,將陶瓷過(guò)濾濾芯多孔介質(zhì)部分設(shè)置為porous-jump壁面條件,其表面滲透率設(shè)定為5.5×10-1 2m2,對(duì)不同進(jìn)氣速度、進(jìn)氣方式、過(guò)濾器內(nèi)壓力和溫度進(jìn)行了模擬,根據(jù)多次模擬計(jì)算結(jié)果,揭示了進(jìn)氣管內(nèi)氣流分布的規(guī)律,并據(jù)此優(yōu)化了進(jìn)氣管的設(shè)計(jì);通過(guò)對(duì)濾芯內(nèi)外壓力以及氣流速度的模擬結(jié)果的分析,并基于對(duì)過(guò)濾器內(nèi)部氣流流動(dòng)狀態(tài)的研究,得到速度場(chǎng)和壓力場(chǎng)對(duì)陶瓷濾芯除塵過(guò)程的影響規(guī)律;通過(guò)對(duì)800K(526.85℃)入口氣流溫度條件下,過(guò)濾器內(nèi)及濾芯內(nèi)外溫度分布模擬結(jié)果的分析,得到溫度場(chǎng)對(duì)陶瓷過(guò)濾器除塵過(guò)程的影響規(guī)律。本文研究結(jié)果為陶瓷過(guò)濾器的實(shí)際應(yīng)用與優(yōu)化設(shè)計(jì)提供了有益的參考。
[Abstract]:Advanced power generation systems and clean coal technologies, especially advanced power generation systems, such as integrated coal gasification combined cycle power generation (IGCC) and pressurized fluidized bed combustion (PFBC), require the effective removal of particulate matter at high temperatures. To protect downstream turbines and meet increasingly stringent emission standards, high temperature gas filtration has become an essential part of these systems. At the same time, due to the characteristics of high emission of PM2.5 fine particles in metallurgical industry, strong corrosion and low purification rate of traditional dust removal process, it is urgent to develop the technology of high temperature flue gas filtration and deep purification. As the most promising high-temperature flue gas filtration equipment, ceramic filter can be used to remove ultrafine particles below 5 渭 m in flue gas, and the filtration efficiency can reach more than 99%. It can be used in chemical industry, refining, incineration and metal smelting. Metal recovery industry and advanced power generation systems have a wide range of applications. Ceramic filter is the most important equipment in high temperature flue gas filtration system. When the dust gas enters into the filter, the separation of dust particles and gas can be realized through the processes of retention and capture, inertial collision capture and diffusion capture. In order to prolong the service life of the ceramic filter and ensure the normal operation of the filter system, it is necessary to clean the dust and regenerate the filter. Compared with electrostatic dust removal and cloth bag dust removal, the process is more complex, so it is very important to carry out systematic research and design for a variety of influencing factors. In this paper, according to the process of dust removal and ash removal and regeneration of ceramic filter, through wall thickness calculation, thermodynamic calculation and so on, a 100m3/h treatment machine is designed. The working pressure is 5 KPA and the working temperature is 550 鈩，

本文編號(hào)：2110883