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《Environmental Science & Technology》 2013-S1
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Study on the Characteristics of Harmful Gas Distribution of Welding Semi-closed Field

QI Shun-shun,CHEN Shu-jin,ZHU Wen-qi(Provincial Key Lab of Advanced Welding Technology,Jiangsu University of Science and Technology,Zhenjiang 212003,Chian)  
In order to reveal the harmful gas distribution characteristics of welding semi-closed field,established a welding workshop computer model.Under conditions of natural and mixed convection,the flow state of CO generated in the welding process within the workshop was simulated based on the zero-equation turbulence model.The distribution of CO was analyzed under the conditions of different exhaust rate and different number of work welder.Studies have shown that higher concentration CO appears in the region of 0.6 m to 1.5 m from the ground;it is necessary to adjust the nuumber of air vents when the number of welder is changing.In addition,the asymmetric structure of workshop also affect the distribution of CO.The simulation results not only can evaluate the pros and cons of the workshop structure and ventilation system,but also provide a theoretical basis for hazardous gas detection and alarm strategy designed for further the purposes.
【Fund】: 江苏省大学生科技创新训练重点资助项目(20120136)
【CateGory Index】: R134
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