LIYang-yang,PENGWen-feng,LEILin-hui,et al.Simulation Effect of Ductless Ventilation System in Underground Wastewater Treatment Plants Based on CFD[J].China Water & Wastewater,2024,40(17):104-110.
Simulation Effect of Ductless Ventilation System in Underground Wastewater Treatment Plants Based on CFD
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第17期
Page:
104-110
Column:
Date of publication:
2024-09-01
- Keywords:
- underground wastewater treatment plant; ductless ventilation system; piston flow; computational fluid dynamics (CFD)
- Abstract:
- The traditional duct ventilation system of underground wastewater treatment plants features a complex structure and occupies a considerable space with the duct. As a novel ventilation mode, the duct less ventilation system can curtail the construction of the duct, decrease the buried depth of the box, and possesses a wide application space. Taking an underground wastewater treatment plant in Hebei Province as the research subject, a model was constructed to analyze the advantages and disadvantages of the air flow organization and the air age distribution of the traditional duct ventilation system and the ductless ventilation system under the conditions of 4 times, 6 times, 8 times, and 10 times air changes per hour. The ductless ventilation system demonstrated the merits of a more stable air flow organization and a shorter air age under diverse working conditions, and the ventilation performance was superior. Under the same working condition, the wind speed of the ductless ventilation system distributed at each monitoring point was higher than that of the duct ventilation system, and the overall wind speed difference at each measuring point was approximately 0.2 m/s. The air age of the duct ventilation system was mostly above 500 seconds, while that of the ductless ventilation system could be maintained below 200 seconds.
Last Update:
2024-09-01