本文選題：高溫煙氣過濾 + 陶瓷過濾器　； 參考：《華北電力大學》2015年碩士論文

【摘要】：先進發(fā)電系統(tǒng)以及清潔煤技術(shù),特別是先進發(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,以保護下游渦輪機和滿足日趨嚴格的排放標準,因此高溫氣體過濾已經(jīng)成為了這些系統(tǒng)中的一個基本組成部分。同時,由于冶金行業(yè)PM2.5細顆粒物排放量大、腐蝕性強、傳統(tǒng)除塵工藝凈化率低等特點,也急需發(fā)展高溫煙氣過濾深度凈化技術(shù)。陶瓷過濾器作為最具有發(fā)展?jié)摿Φ母邷責煔膺^濾設備,可用于清除煙氣中5μm以下的超細顆粒,且過濾效率可達99%以上,在化工、煉油、焚化、金屬冶煉、金屬回收工業(yè)以及先進發(fā)電系統(tǒng)中具有廣泛的應用前景。陶瓷過濾器作為高溫煙氣過濾系統(tǒng)中最主要的設備,當含塵氣體進入過濾器內(nèi),通過截留捕捉、慣性碰撞捕捉以及擴散捕捉等過程,實現(xiàn)粉塵顆粒與氣體的高效分離。為了延長陶瓷濾芯的使用壽命,同時保證過濾系統(tǒng)的正常運行,需要對濾芯進行清灰并使濾芯再生。和靜電除塵及布袋除塵相比,其過程更為復雜,因此針對多種影響因素開展系統(tǒng)研究和設計至關重要。本文針對陶瓷過濾器的除塵和清灰再生過程,通過壁厚計算、熱力計算等,設計了一臺具有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濾系統(tǒng),主要由進氣系統(tǒng)、凈化系統(tǒng)、反吹清灰系統(tǒng)三大部分構(gòu)成。同時利用Geometry和Pro/Engineer軟件建立了陶瓷過濾器的三維模型,利用ICEM劃分網(wǎng)格,導入Fluent軟件,進行了數(shù)值計算。數(shù)值模擬過程中選擇Realizable k-e模型,將陶瓷過濾濾芯多孔介質(zhì)部分設置為porous-jump壁面條件,其表面滲透率設定為5.5×10-1 2m2,對不同進氣速度、進氣方式、過濾器內(nèi)壓力和溫度進行了模擬,根據(jù)多次模擬計算結(jié)果,揭示了進氣管內(nèi)氣流分布的規(guī)律,并據(jù)此優(yōu)化了進氣管的設計;通過對濾芯內(nèi)外壓力以及氣流速度的模擬結(jié)果的分析,并基于對過濾器內(nèi)部氣流流動狀態(tài)的研究,得到速度場和壓力場對陶瓷濾芯除塵過程的影響規(guī)律;通過對800K(526.85℃)入口氣流溫度條件下,過濾器內(nèi)及濾芯內(nèi)外溫度分布模擬結(jié)果的分析,得到溫度場對陶瓷過濾器除塵過程的影響規(guī)律。本文研究結(jié)果為陶瓷過濾器的實際應用與優(yōu)化設計提供了有益的參考。
[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：2110883