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  本文選題：濕式金屬網(wǎng)除塵器　切入點：除塵效率　出處：《東北大學(xué)》2013年碩士論文

【摘要】：隨著礦井采掘機械化程度的不斷提高,煤礦塵害問題日益突出。煤塵不僅危害作業(yè)人員的身體健康,引發(fā)塵肺病,而且有可能引起煤塵爆炸,釀成礦井重大災(zāi)害事故。在煤礦的生產(chǎn)過程中,尤其以機掘工作面和綜采工作面粉塵濃度最高,從保護現(xiàn)場作業(yè)人員職業(yè)安全健康以及企業(yè)安全生產(chǎn)的角度考慮,必須將粉塵濃度控制在可容許的范圍以內(nèi)。濕式除塵器是礦井常用的除塵設(shè)備,我國對濕式金屬網(wǎng)的研究尚處在起步階段,為了彌補我國在這方面的不足,本論文研發(fā)了濕式金屬網(wǎng)除塵器,并就其除塵性能進行測試,尋找除塵器的最優(yōu)工作條件。本文首先分別對噴嘴霧化機理和經(jīng)典粒子捕集機理作了分析,研究了水滴、水膜作用于礦塵的濕式除塵機理以及影響除塵效果的因素；在此基礎(chǔ)上,設(shè)計了系統(tǒng)的實驗方案和實驗裝置,分別制作了基于20層和40層金屬網(wǎng)的濕式除塵器；通過實驗研究了處理風(fēng)量、風(fēng)速、噴水量和金屬網(wǎng)層數(shù)對除塵效率、運行阻力的影響,找到了除塵器運行的最優(yōu)參數(shù)。通過本實驗可以發(fā)現(xiàn)濕式金屬網(wǎng)除塵器的阻力受風(fēng)速影響較大,噴水量影響較��；除塵效率隨著水量的增加而增加,但不是線性變化,增加到一定值時,增加速率減慢,隨著風(fēng)速的增加除塵效率先增大后減小。因為風(fēng)速和水量是影響阻力和效率的主要因素,對這兩個參數(shù)同時優(yōu)化通過試驗得到了最佳入口風(fēng)速為2m/s,最佳噴水量為14L/min,在該條件下除塵器的效率高為達(dá)95.05%、阻力僅為71.17pa,具備節(jié)水節(jié)能的功效,可以在礦山、煤炭、冶金等多個行業(yè)中進行推廣應(yīng)用。
[Abstract]:With the increasing mechanization of mine excavation, the problem of coal dust damage is becoming more and more serious. Coal dust not only harms the health of workers and causes pneumoconiosis, but also may cause coal dust explosion. In the process of coal mine production, especially in mechanized working face and fully mechanized mining face, the dust concentration is the highest, considering from the angle of protecting the occupational safety and health of the workers in the field and the safe production of the enterprise, The dust concentration must be controlled within the allowable range. Wet dust collector is a commonly used dust removal equipment in mines. The research on wet metal mesh in our country is still in its infancy, in order to make up for the deficiency of our country in this respect, In this paper, a wet metal mesh dust collector is developed, and its dust removal performance is tested to find the optimal working conditions. Firstly, the atomization mechanism of the nozzle and the classical particle capture mechanism are analyzed, and the water droplets are studied. The wet dust removal mechanism of water film acting on mine dust and the factors influencing the dust removal effect are also discussed. On this basis, the experimental scheme and experimental device are designed, and the wet dust collector based on 20 layers and 40 layers metal mesh is made, respectively. The effects of air volume, wind speed, water spray rate and the number of metal mesh layers on the dust removal efficiency and running resistance were studied experimentally. The optimum parameters for the operation of the dust collector are found. It is found that the resistance of the wet metal mesh precipitator is greatly affected by the wind speed and the amount of water sprayed, and the dust removal efficiency increases with the increase of water content, but it is not a linear change. When increasing to a certain value, the increase rate slows down, and with the increase of wind speed, the dust removal efficiency increases first and then decreases, because wind speed and water volume are the main factors affecting resistance and efficiency. The optimum inlet wind speed is 2 m / s, and the best water injection rate is 14 L / min. Under this condition, the efficiency of the dust collector is 95.05, the resistance is only 71.17 pa. it has the function of saving water and energy, and it can be used in mines and coal. Metallurgy and other industries to promote the application.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD714.4

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本文編號：1677032