基于Ventsim原尺度模拟强化通风前后污水管道内有害气体迁移扩散规律

张志强; 赵磊; 王佳豪; 袁宏林; 卢金锁

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (9) : 4896-4903.

水污染与控制

基于Ventsim原尺度模拟强化通风前后污水管道内有害气体迁移扩散规律

张志强^1,2, 赵磊¹, 王佳豪¹, 袁宏林¹, 卢金锁¹

作者信息 +

Prototype Scale Simulation on hazardous gas advection and diffusion affected by enhanced ventilation in sewage networks using Ventsim

ZHANG Zhi-qiang^1,2, ZHAO Lei¹, WANG Jia-hao¹, YUAN Hong-lin¹, LU Jin-suo¹

Author information +

文章历史 +

摘要

以西安某生活区污水管网为研究对象,利用Ventsim软件模拟预测了污水管道中硫化氢(H₂S)气体在自然和强化通风条件下的迁移扩散规律.结果表明,模拟与实测结果偏差小于10%,证明了Ventsim模拟方法的可靠性.相比于自然通风条件,强化通风作用下管段风速提高了8.8%,单一设置进气或排气风机有害气体完全排出污水管网需108和105s,同时设置进气和排气风机能够进一步提升有害气体迁移速率,有害气体排出污水管网需55s,仅设置进气风机会使H₂S逸散出检查井小孔.以上研究结果可为预测和控制污水管道中的有害气体以及管道安全运维提供技术方法支持.

Abstract

This study investigated the advection and diffusion patterns of hydrogen sulfide (H₂S) in a prototype sewer network of a residential area in Xi'an, using Ventsim to simulate both natural and forced ventilation conditions. The results show that the simulated and measured values are within 10% difference, which confirms the reliability of the Ventsim simulation method. Forced ventilation increased the air velocity in sewer pipes by 8.8% compared to natural ventilation conditions. It was further found that utilizing only an intake or exhaust fan required 108s and 105s, respectively to completely expel hazardous gases from the sewage network. Simultaneous operation of both intake and exhaust fans significantly enhanced the migration rate of harmful gases, reducing the expulsion time to 55s. Nevertheless, using only an intake fan may cause H₂S to escape through small openings on manhole covers. These findings provide technical support for predicting and controlling hazardous gases within sanitary sewer networks, contributing to infrastructure safety and operational maintenance.

导出引用

张志强, 赵磊, 王佳豪, 袁宏林, 卢金锁. 基于Ventsim原尺度模拟强化通风前后污水管道内有害气体迁移扩散规律[J]. 中国环境科学. 2025, 45(9): 4896-4903

ZHANG Zhi-qiang, ZHAO Lei, WANG Jia-hao, YUAN Hong-lin, LU Jin-suo. Prototype Scale Simulation on hazardous gas advection and diffusion affected by enhanced ventilation in sewage networks using Ventsim[J]. China Environmental Science. 2025, 45(9): 4896-4903

中图分类号： X506

参考文献

[1] 刘伟,石烜,徐栋伟,等.流速对污水管道中甲烷与硫化物生成的影响 [J].中国环境科学, 2023,43(6):2938-2947. Liu W, Shi X, Xu D W, et al. Effect of flow velocity on methane and sulfide formation in sewage pipes [J]. China Environmental Science, 2023,43(6):2938-2947.
[2] Cao J, Zhang L, Hong J, et al. Different ferric dosing strategies could result in different control mechanisms of sulfide and methane production in sediments of gravity sewers [J]. Water Research, 2019,164.DOI:10.1016/j.watres.2019.114914.
[3] Jiang G, Sharma K R, Yuan Z. Effects of nitrate dosing on methanogenic activity in a sulfide-producing sewer biofilm reactor [J]. Water Research, 2013b,47(5):1783-1792.
[4] Wu M, Wang T, Wu K, et al. Microbiologically induced corrosion of concrete in sewer structures: A review of the mechanisms and phenomena [J]. Construction and Building Materials, 2020,239.DOI: 10.1016/j.conbuildmat.2019.117813.
[5] Salehi R, Chaiprapa T S. Single-/triple-stage biotricklingfilter treating a H₂S-rich biogas stream: statistical analysis of theeffeet of empty bed retention time and liquid recirculation velocity [J]. Journal of the Air & Waste Management Association, 2019,69(12):1429-1437.
[6] Sun Y, Terheijne A, Rijnaarts H, et al. The effect of anode potential on electrogenesis, methanogenesis and sulfidogenesis in a simulated sewer condition [J]. Water Research, 2022,226.DOI:10.1016/j.watres. 2022.119229.
[7] 廖足良,张勤.建筑排水系统气压波动原因剖析 [J].给水排水, 1996,(1):39-40. Liao Z L, Zhang Q. Analysis on the causes of air pressure fluctuation in building drainage system [J]. Water & Wastewater Engineering, 1996,(1):39-40.
[8] Cheng C L, Lu W H, Shen M D. An empirical approach: Prediction method of pressure distribution on building vertical drainage stack [J]. Journal of the Chinese Institute of Engineers, 2005,28(2):205-217.
[9] 彭海龙,张勤,赵世明,等.关于单立管系统通气流量影响因素的试验研究 [J].中国给水排水, 2016,32(5):127-30. Peng H L, Zhang Q, Zhao S M, et al. Experimental study on Influencing Factors of ventilation flow in single riser system [J]. China Water & Wastewater, 2016,32(5):127-30.
[10] Zhang W M, Asce A M, Zhu Z D, et al. Use of Air Circulation Pipes in Deep Dropshafts for Reducing Air Induction into Sanitary Sewers [J]. Journal of Environmental Engineering, 2016,142(4):04015092.
[11] Qian Y, Zhu Z D, Yue D. Effect of pump operation on headspace air pressure variation in sanitary sewer systems [J]. Journal of Environmental Engineering, 2021,147(3):06021001.
[12] Edwinibonsu S, Steffler P. A physically-based model for computing natural ventilation rate in sanitary sewer atmosphere [J]. Proceedings of the Water Environment Federation, 2004,2004(3):788-810.
[13] Ward, Matthew, Corsi, et al. Characterization of natural ventilation in wastewater collection systems [J]. Water Environment Research, 2011, 83(3):265-273.
[14] Lu J S, Zhang E, Li K. Enhancing the ventilation of sewers by using inhaled air in the vertical stack of a building [J]. Water Practice & Technology, 2018,13(3):555-565.
[15] 张二飞,卢金锁.建筑排水立管直接接入污水管网的通风性能分析 [J].中国给水排水, 2018,34(17):112-115. Zhang E F, Lu J S. Improvement of sewer ventilation performance by directly linking with building vertical pipe [J]. China Water & Wastewater, 2018,34(17):112-115.
[16] 袁宏林,樊政鑫,卢金锁,等.污水管道强化通风技术的CFD模拟及现场验证 [J].环境工程学报, 2022,16(3):1048-1054. Yuan H L, Fan Z X, Lu J S, Simulation and experimental study on reinforced ventilation of sewage pipelines [J]. Chinese Journal of Environmental Engineering, 2022,16(3):1048-1054.
[17] 肖梦辉,于涛,常宝孟,等.基于Ventsim的复杂矿井火灾数值模拟研究 [J].矿业研究与开发, 2021,41(12):129-134. Xiao M H, Yu T, Chang M B, et al. Numerical simulation study on complex mine fire based on ventsim [J]. Mining Research and Development, 2021,41(12):129-134.
[18] 田晓波.基于矿井三维通风的火灾模拟研究 [J].当代化工研究, 2023,(2):141-143. Tian X B. Study of fire simulation based on three-dimensional ventilation in mines [J]. Modern Chemical Research, 2023,(2):141-143.
[19] 郝海清,蒋曙光,王凯,等.基于Ventsim的矿井运输巷火灾风烟流应急调控技术 [J].煤矿安全, 2022,53(9):38-46. Hao H Q, Jiang S G, Wang K, et al. Emergency control technology of air and smoke flow in mine belt roadway fire based on ventsim software [J]. Safety in Coal Mines, 2022,53(9):38-46.
[20] 周亚鹏.城镇排水系统通风效应分析及增强通风试验研究 [D].西安:西安建筑科技大学, 2020. Zhou Y P. Analysis of ventilation effect of urban drainage system and experimental research on enhanced ventilation [D]. Xi'an: Xi'an University of Architecture and Technology, 2020.
[21] 刘艳涛,卢金锁,闫帅军.污水检查井盖调研及其预留孔对井内气体组分影响 [J].中国给水排水, 2017,33(3):97-101. Liu Y T, Lu J S, Yan S J. Survey on sewage manhole cover and impact of its reserved holes on gas components in manhole [J]. China Water & Wastewater, 2017,33(3):97-101.