ANALYSIS OF GAS DIFFUSION PROCESS OF FURNACE SMOKE AND OPTIMIZATION OF DUST COLLECTING HOOD
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摘要: 基于焦炉炉头烟扩散过程的分析研究,提出栅网状抽吸面以及侧吸式抽吸结构的炉头烟集尘罩结构,并通过计算机仿真的方法进行分析。结果表明:栅网结构的抽吸形式增加了有效抽吸面积,优化了抽吸风量分布,解决了传统集尘罩有效抽吸截面小及风量分配不合理的问题;集尘罩前端的侧吸式抽吸结构,对沿顶板向两侧扩散烟气形成一种侧吸的效果,解决了炉头烟在冲击导烟板后向两侧排放的问题;优化后集尘罩结构,在风机风量降低30%时,依然能够对焦炉炉头烟实现有效治理,提高了集尘设备的运行效率。Abstract: Based on the analysis and research of the diffusion process of the flue gas in the coke oven head, this paper presented dust collecting hood with a grid mesh suction surface and a side suction structure to control the flue gas and analyzed through the method of computer simulation. The results showed that the suction form of the grid structure increased the effective suction area, optimized the distribution of the suction volume, and solved the problems of small effective suction section and unreasonable air volume distribution of the traditional dust collection hood. The suction structure at the front end of the dust collection hood could form a side suction effect for the smoke moving along the smoke guide plate to both sides, and that realized the collection of the smoke, and solved the problem of smoke discharged to both sides after impacting the smoke guide plate. The new dust collection hood structure could still effectively control the flue gas when the air volume of the fan was reduced by 30%, thus improving the dust collection efficiency.
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Key words:
- furnace smoke /
- buoyancy jet /
- dust collecting hood /
- grid bar /
- side suction dust collection
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刘洪春. 中国焦炉的大型化之路[C]//第七届中国钢铁年会. 2009. 胡学毅, 薄以匀. 焦炉炼焦除尘[M]. 北京:化学工业出版社, 2010. 王素菡. 焦炉作业工人多环芳烃、重金属暴露与肺功能降低的队列研究[D]. 武汉:华中科技大学, 2016. MU L, PENG L, LIU X F, et al. Emission characteristics of heavy metals and their behavior during coking processes[J]. Environmental Science & Technology, 2012, 46(11):6425-6430. MU L, PENG L, CAO J J, et al. Emissions of polycyclic aromatic hydrocarbons from coking industries in China[J]. Particuology, 2013, 11(1):86-93. 王怡, 黄艳秋, 杨洋,等. 大型工业建筑中高温含尘气流的流动规律及控制方法[J]. 科学通报, 2015,60(18):1690-1697. 王怡, 疏艺波, 黄艳秋,等.浮射流速度场和断面流量规律特性的研究[J]. 西安建筑科技大学学报(自然科学版), 2014, 46(6):839-843. LIST E J. Turbulent buoyant jets and plumes[J]. Annual Review of Fluid Mechanics, 2003, 14(1):189-212. RIM D, WALLACE L, NABINGER S, et al. Reduction of exposure to ultrafine particles by kitchen exhaust hoods:the effects of exhaust flow rates, particle size, and burner position[J]. Science of the Total Environment, 2012, 432:350-356. 王怡, 刘秋寒, 黄艳秋,等. 浮射流上方排风罩的捕集效率分析及优化设计[J]. 环境工程, 2015, 33(1):90-94. 魏培恒. 火灾状况下船舶厨房烟气控排的数值模拟研究[D].哈尔滨:哈尔滨工业大学,2017. HUANG Y Q, LU K, WANG Y,et al. Study on limit flow ratio method for a lateral exhaust hood above high-temperature buoyant jets[J]. Sustainable Cities and Society,2020,54(3):101969. VLADAS V, INA T, VADIM M. Investigation of the efficiency of the lateral exhaust hood enhanced by aeroacoustic air flow[J]. Process Safety & Environmental Protection, 2017, 109:224-232. 黄艳秋, 李满堂, 王怡, 等. 炼钢电炉高温烟气流场特性及侧吸罩的优化研究[J]. 暖通空调, 2018, 48(11):7-13. 茅靳丰, 余南田, 周进, 等. 机械排烟量对防护工程走廊烟气扩散的影响[J]. 工程热物理学报, 2018,39(7):1614-1620. 李炜, 槐文信. 浮力射流的理论及应用[M]. 北京:科学出版社, 1997. 林大建, 黎良飞, 周红. 旋幕式排风罩收集电焊烟尘的数值模拟[J]. 安全与环境学报, 2019, 19(1):232-237. WANG Y, HUANG Y Q, LIU J P, et al. Flow-field characteristics of high-temperature annular buoyant jets and their development laws influenced by ventilation system[J]. The Scientific World Journal, 2013, 2013:1-11. GONZALEZ E, MARZAL F, MINANA A, et al. Influence of exhaust hood geometry on the capture efficiency of lateral exhaust and push-pull ventilation systems in surface treatment tanks[J]. Environmental Progress, 2008, 27(3):405-411. 第五徐涛. 多热源作用下侧吸罩流场及捕集效率特性的研究[D]. 西安:西安建筑科技大学,2016. 左斌祥, 潘建明. 皮托管平行测速法烟气监测方法的改进[J]. 中国环境监测, 2005, 21(6):37-39.
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