立体送风气流组织对地下污水厂除臭效果的影响
Effects of the three-dimensional air distribution on deodorization in the underground wastewater treatment plant
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摘要: 为研究立体送风气流组织在地下污水厂除臭效果，以NH3为示踪气体，采用数值仿真的方法，对比分析了立体送风及常规气流组织在脱水机房中的除臭效果，并研究了不同送、排风形式对脱水机房的排污效率和恶臭浓度的影响规律。结果表明，竖管立体送风在地下污水厂脱水机房环境的改善效果上存在优势，与原通风形式相比排污效率提高了40%，机房恶臭浓度和工作区恶臭浓度分别降低了43.7%、62.9%。立体送风气流组织下送风量对脱水机房除臭效率影响不明显；而增大排风量，排污效率明显提高。立体送风气流组织可以有效提高地下污水厂的除臭效果，合理地增大排风量、降低送风量可以提高除臭效果，同时实现降低通风能耗。Abstract: In order to study the deodorizing effect of three-dimensional air supply in the underground sewage plant, NH3 was taken as a tracer gas, and the numerical simulation method was used to compare the deodorizing effects between the three-dimensional air supply and the conventional airflow organization in the dewatering machine room. The influences of different air supply and exhaust forms on sewage discharge efficiency and odor concentration in the dewatering machine room were also studied. The results show that three-dimensional air supply with vertical pipes has an advantage in environmental quality improvement for the dewatering machine room of an underground sewage plant, and its deodorization efficiency increased by 40% than that of the original ventilation form. The average odor concentrations in the dewatering machine room and work area decreased by 43.7% and 62.9%, respectively. In addition, the three-dimensional air supply volume has slight effect on the deodorization efficiency in the dewatering machine room, but the deodorization efficiency significantly increased with the increase of the exhaust air flow. The three-dimensional air supply structure could effectively improve the deodorization effect of the underground sewage plant, and a reasonable increase in the exhaust air flow and reduction in air supply flow could also improve the deodorization effect and reduce the ventilation energy consumption.
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[1] 孙世昌, 汪翠萍, 王凯军. 地下式污水处理厂的研究现状及关键问题探讨[J]. 给水排水, 2016, 42(6): 37-41. [2] 林冰洁. 污水处理厂的土地利用现状及节地措施[J]. 建设科技，2015, 14(13): 35-37. [3] LEWKOWSKA P, CIESLIK B, DYMERSKI T, et al. Characteristics of odors emitted from municipal wastewater treatment plant and methods for their identification and deodorization techniques [J]. Environmental Research, 2016, 151(50): 573-586. [4] 刘承东, 杨鹏, 刘雪峰, 等. 地下污水处理厂恶臭污染物空间分布特性仿真分析[J]. 制冷与空调, 2017, 28(1): 79-87. [5] ZHANG C, WANG L, WANG X, et al. Odor emission impact assessment of Zhengwangfen Wastewater Treatment Plant in Beijing [J]. Desalination and Water Treatment, 2016, 57(38): 17901-17910. [6] 韩宗伟, 王嘉, 邵晓亮, 等. 城市典型地下空间的空气污染特征及其净化对策[J]. 暖通空调, 2009, 39(11): 21-30. [7] 凌继红, 于会洋, 李猛, 等. 气流组织对负压隔离病房排污效率的影响[J]. 天津大学学报(自然科学与工程技术版), 2014, 60(2): 174-179. [8] 杨苹, 肖莹, 简弃非, 等. 通信机房的气流组织特性与空调冷量调配方案[J]. 华南理工大学学报(自然科学版), 2009, 37(11): 107-111. [9] 齐欣, 张晓明. 地铁车厢中通风对污染物的模拟分析[J]. 节能, 2016, 35(2): 18-21. [10] 邓元媛, 周吉日, 姚宁. 多晶硅生产还原厂房置换通风气流组织研究[J]. 暖通空调, 2014, 44(1): 80-82. [11] LI Y, HUANG X, YU I, et al. Role of air distribution in SARS transmission during the largest nosocomial outbreak in Hong Kong[J]. Indoor Air, 2005, 15(2): 83-95. [12] CHEONG K, PHUA S Y. Development of ventilation design strategy for effective removal of pollutant in the isolation room of a hospital [J]. Building and Environment, 2006, 41(9): 1161-1170. [13] 刘洪波, 邓特刚, 李小松. 基于CFD的污泥脱水机房恶臭扩散分布规律研究[J]. 环境工程学报, 2009, 3(5): 875-880. [14] 郭栋鹏, 乔清党, 姚仁太. κ-ε(RNG)、LES模拟建筑物周围气流特征及湍流扩散的风洞试验验证[J]. 实验流体力学, 2011, 25(5): 55-63. [15] HE G, YANG X, SREBRIC J. Removal of contaminants released from room surfaces by displacement and mixing ventilation: Modeling and validation[J]. Indoor Air, 2005, 15(5): 367-380. [16] 王华平，范存养. 室内换气排污效果的评价指标[J]. 暖通空调, 2005, 27(1): 29-34. -
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