本文關鍵詞：旋風除塵器提高微細粉塵除塵效率的研究　出處：《武漢科技大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 旋風除塵器 噴霧 仿真優(yōu)化 復合形法

【摘要】：旋風除塵器作為一種常用的除塵設備，提高其對粉塵分離效率問題一直是國內外研究的熱點。對于8～10μm以上的顆粒，，現(xiàn)代的旋風除塵器能夠基本除盡。而對于5μm以上的顆粒粉塵，旋風除塵器也擁有較好的除塵效率，能夠在工業(yè)上得到普遍應用。但是針對5μm以下的微細粉塵，由于其較低分離效率，還不能廣泛應用于工業(yè)上。 本論文針對微細粉塵除塵效率不高的問題及旋風除塵器尺寸優(yōu)化主要做了以下工作： （1）通過在旋風除塵器頂端安裝噴頭,將旋風除塵和噴霧降塵相結合。高速旋流提高了霧滴碰撞并捕集微塵粒子的概率，而霧滴則增加了微塵粒子的離心力，致使微塵粒子更容易被甩向器壁。利用CFX仿真計算出除塵器的可噴霧空間，發(fā)現(xiàn)可噴霧區(qū)間只與旋風除塵器的筒體直徑有關，與入口氣速及粉塵粒徑無關。并并通過數(shù)學方法計算出噴霧過程中壓力與捕捉效率的數(shù)學關系進而求解壓力對噴霧型旋風除塵器性能的影響。同時考慮噴霧液滴因旋轉氣流的熱傳導而造成的蒸發(fā)現(xiàn)象，計算出了噴霧液滴粒徑與含塵氣體溫度的關系。 (2）針對小筒徑的旋風除塵器，排氣管的直徑及插入深度均會對其除塵效率造成比較明顯的影響。本文通過利用ANSYS CFX流體仿真軟件的多相流模塊對排氣管的直徑，插入深度及筒體直徑進行仿真，并分析其影響旋風除塵器除塵效率的原因。結果表明筒體直徑為30mm，排氣管插入深度為60mm時旋風除塵器的除塵效率較好。 （3）以ANSYS軟件為工具，利用復合形法對排氣管插入深度及筒體直徑進行聯(lián)合仿真優(yōu)化，求解了旋風除塵器除塵效率關于以上兩個參數(shù)的局部最優(yōu)解，為以后多參數(shù)的仿真優(yōu)化提供參考。
[Abstract]:As a kind of commonly used dust removal equipment, cyclone dust collector has been a hot spot in domestic and international research for improving its dust separation efficiency. The modern cyclone dust collector can be basically eliminated, and for the particle dust above 5 渭 m, the cyclone dust collector also has a better dust removal efficiency. It can be widely used in industry, but for fine dust below 5 渭 m, it can not be widely used in industry because of its low separation efficiency. In this paper, aiming at the problem that the dust removal efficiency of fine dust is not high and the size optimization of cyclone dust collector, the main work is as follows: By installing a sprinkler at the top of the cyclone dust collector, the cyclone dedusting is combined with the spray dust fall. The high speed swirl increases the probability of droplets colliding and catching dust particles. The droplet increases the centrifugal force of the dust particles, which makes the dust particles easier to be thrown to the wall of the device. The spray space of the dust collector can be calculated by CFX simulation. It is found that the spray zone is only related to the diameter of the cylinder of the cyclone precipitator. It is independent of inlet gas velocity and dust particle size. The mathematical relationship between pressure and capture efficiency in spray process is calculated by mathematical method, and the influence of pressure on the performance of spray type cyclone dust collector is solved. Evaporation caused by the heat conduction of a rotating airstream. The relationship between the droplet size and the temperature of the dust-containing gas was calculated. Cyclone dust collector for small diameter. The diameter and insertion depth of exhaust pipe will have a significant effect on the dust removal efficiency. In this paper, the diameter of exhaust pipe is affected by the multiphase flow module of ANSYS CFX fluid simulation software. The insertion depth and the diameter of the cylinder are simulated, and the reasons that affect the dust removal efficiency of the cyclone dust collector are analyzed. The results show that the diameter of the cylinder is 30 mm. The dust removal efficiency of cyclone dust collector is better when the depth of exhaust pipe insertion is 60 mm. Using the ANSYS software as the tool, the exhaust pipe insertion depth and the tube diameter are simulated and optimized by using the complex method. The local optimal solution of the dust removal efficiency of cyclone precipitator with respect to the above two parameters is solved, which provides a reference for the simulation and optimization of multiple parameters in the future.
【學位授予單位】：武漢科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X701.2

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本文編號：1406298