不同送排风量下脱水机房竖直离子风管的通风除臭效果
Ventilation and deodorizing effect of vertical ionizing air duct in dewatering room under different air supply volume and exhaust volume
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摘要: 以地埋式污水处理厂的通风排污系统为研究对象，污水处理时产生的恶臭气体严重影响室内外环境，通风系统中排风与送风风量的合理匹配对于改善厂区内部空气品质至关重要。以空气品质最差的脱水机房为例，对传统的无组织渗风以及竖直管侧向离子风下不同风量进行数值模拟，从速度场分布，氨气敏感浓度面积占比，工作区域平均空气龄，以及通风除臭效果进行仿真分析。结果表明，竖直管侧向送离子风比传统无组织渗风对改善脱水机房空气品质作用更显著，提高排风风量和新风比可以有效降低室内恶臭浓度和提高排污效率，并且提高新风比对提高排污效率的影响更为显著，给工作人员提供更好的风感和更新鲜的空气。Abstract: Taking the ventilation and blowdown system of buried water treatment plant as the research object, foul gas produced by sewage treatment seriously affects indoor and outdoor environment. The reasonable matching of exhaust air volume and air supply volume in the ventilation system is essential for the improvement of air quality inside the plant area. Take the dewatering room which has the worst air quality as an example, numerical simulation of the traditional air supply model and the situation of different air flow within the ion wind from the sides of vertical tubes were made. And simulation analysis was made from the perspective of velocity field distribution, area ratio of ammonia sensitive concentration, mean air age in the work area , and ventilation deodorization effect. The results showed that relative to the traditional air supply mode, the effect of the composite air supply mode on the improvement of the air quality of the dewatering room can be more significant. Increasing the exhaust air volume and the fresh air ratio can effectively reduce the indoor odor concentration and improve the contaminant removal efficiency. Improving fresh air ratio can have a more significant impact on improving the contaminant removal efficiency, and it can give the staff a better sense of wind and fresh air.
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