本文關(guān)鍵詞：除塵器進(jìn)氣口氣流分布數(shù)值模擬及設(shè)計(jì)　出處：《河北科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電除塵器 除塵效率 數(shù)值模擬 氣流分布板 流動(dòng)狀態(tài)

【摘要】：隨著鋼鐵產(chǎn)量的高速發(fā)展,大氣環(huán)境的惡化加劇,人們的生存和居住環(huán)境正面臨著挑戰(zhàn)。鋼鐵行業(yè)生產(chǎn)鋼鐵的過(guò)程中將產(chǎn)生大量的煙氣粉塵等副產(chǎn)品,對(duì)大氣環(huán)境造成嚴(yán)重的污染。鋼鐵企業(yè)應(yīng)在發(fā)展冶煉鋼鐵的主業(yè)時(shí),下大力對(duì)鋼鐵生產(chǎn)中產(chǎn)生的副產(chǎn)品進(jìn)行回收利用,增加企業(yè)的非鋼效益。無(wú)論煙氣是排放還是回收利用,煙氣的除塵凈化都是重中之重。環(huán)保對(duì)煙氣排放有嚴(yán)格的要求,冶金行業(yè)的煙氣進(jìn)行粗除塵后再進(jìn)一步精除塵才能夠排放。電除塵器是現(xiàn)代工業(yè)甚至是鋼鐵行業(yè)用于精除塵的主要設(shè)備,它除塵效率高,除塵量較傳統(tǒng)除塵器也比較顯著,企業(yè)需求也就越來(lái)越大。在煙氣粉塵含量較低的情況下,濕式電除塵器效果也比較好。但是國(guó)內(nèi)企業(yè)都是模仿國(guó)外除塵器結(jié)構(gòu)思路對(duì)產(chǎn)品進(jìn)行改造,不斷探索以加強(qiáng)除塵器的除塵效率,除塵器內(nèi)理想的氣流分布狀態(tài)是均勻流動(dòng)的層流。煙氣流動(dòng)的分布狀態(tài)是除塵器提高除塵效率的重要參數(shù),故本論文將如何得到理想的氣流分布作為研究?jī)?nèi)容,通過(guò)在除塵器內(nèi)架設(shè)布置氣流分布板來(lái)改變除塵器內(nèi)部的流場(chǎng)流動(dòng)。采用計(jì)算機(jī)數(shù)值模擬軟件建立三維幾何數(shù)值模型,加載多相流和多介質(zhì)物理模型對(duì)問(wèn)題進(jìn)行求解,得出除塵器進(jìn)氣入口和內(nèi)部流場(chǎng)。通過(guò)改變導(dǎo)流板在除塵器進(jìn)氣口的位置和開(kāi)口率,模擬出不同的流動(dòng)狀態(tài),截取不同點(diǎn)的氣流速度數(shù)值,根據(jù)一定的評(píng)估方法得出最優(yōu)的設(shè)置參數(shù),并對(duì)試驗(yàn)結(jié)果進(jìn)行分析和驗(yàn)證。
[Abstract]:With the rapid development of iron and steel production and the deterioration of atmospheric environment, people's survival and living environment are facing challenges. A large number of flue gas dust and other by-products will be produced in the process of iron and steel production in iron and steel industry. The iron and steel enterprises should make great efforts to recycle the by-products of iron and steel production when developing the main industry of smelting iron and steel. Increase the non-steel benefits of enterprises. No matter whether the flue gas is discharged or recycled, the dust removal and purification of flue gas is the most important. Environmental protection has strict requirements for flue gas emissions. The flue gas of metallurgical industry can only be discharged after coarse dedusting and then fine dust.Electrostatic precipitator (ESP) is the main equipment used for fine dust removal in modern industry and even in iron and steel industry, and its dust removal efficiency is high. Compared with the traditional dust collector, the amount of dust removal is more and more significant, and the demand of the enterprise is also increasing. In the case of low dust content of flue gas. The effect of wet electrostatic precipitator is also good, but domestic enterprises are imitating the structure of foreign dust collector to reform the product, and constantly explore to enhance the dust removal efficiency of the dust collector. The ideal airflow distribution state in the dust collector is laminar flow and the flue gas flow distribution state is an important parameter to improve the dust removal efficiency, so how to get the ideal flow distribution is considered as the research content in this paper. In order to change the flow field of the dust collector, the three-dimensional geometric numerical model is established by installing the airflow distribution plate in the dust collector. The problem is solved by loading multi-phase flow and multi-medium physical model, and the inlet and internal flow field of the dust collector are obtained. Different flow states are simulated by changing the position and opening rate of the guide plate in the inlet of the dust collector. The airflow velocity values of different points are intercepted and the optimal setting parameters are obtained according to certain evaluation methods and the experimental results are analyzed and verified.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X787

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本文編號(hào)：1387071