大型污泥脱水车间除臭送排风模拟和优化研究

Study on Simulation and Optimization of Deodorization, Air Supply and Exhaust for Large Sludge Dewatering Workshop

摘要:

以白龙港污泥处理处置二期工程污泥脱水车间为例，通过计算流体动力学（Computational Fluid Dynamics, CFD）理论并采用分析软件scSTREAM对初始设计方案中车间内送排风流场进行模拟，掌握速度场分布情况，从而对通风除臭效果进行仿真分析。结果表明，初始设计中送排风管道布置及风口设置均存在不合理影响车间内送新风的效果，人员操作层的空气无法得到有效置换，且臭气不能及时有效收集和排出。通过模型的针对性地优化后，送排风效果得到了很大改善。工程建成投产后，第三方检测结果表明，无论是脱水车间内还是配套的除臭设施排口，各项臭气污染物指标均达到排放标准要求。在工程设计过程中有必要对臭气源强和送排风系统进行气流组织模拟以验证设计的合理性。

Abstract:

Taking the sludge dewatering workshop of Bailonggang Sludge Treatment and Disposal Phase II Project as an example, the flow field of air supply and exhaust in the workshop in the initial design scheme is simulated by using the computational fluid dynamics (CFD) theory and analysis software scSTREAM to master the distribution of velocity field and analyze the ventilation and deodorization effects. The results show that the layout of air supply and exhaust duct and the setting of air outlet in the initial design are unreasonable to affect the fresh air supply in the workshop. The air in the personnel operation layer cannot be effectively replaced, and the odor cannot be effectively collected and discharged in time. After the targeted optimization of the model, the effect of air supply and exhaust is greatly improved. After the project was completed and put into operation, the third-party test results show that whether it is in the dewatering workshop or the discharge outlet of supporting deodorization facilities, the odor pollutant indicators all meet the emission standards. In the process of engineering design, it is necessary to simulate the air distribution of odor source and emission system to verify the rationality of the design.