本文選題：發(fā)酵槽　切入點：吹吸式通風　出處：《西安建筑科技大學》2015年碩士論文　論文類型：學位論文

【摘要】：城鎮(zhèn)生活污水的急劇增加,導致污水處理產(chǎn)生的污泥也越來越多,而污泥堆肥處理技術(shù)因符合我國國情備受關(guān)注,但因其臭氣捕集效率較低,成為這項技術(shù)難以普及的關(guān)鍵。本課題以鄭州市某污泥處理廠為背景,研究其污泥堆肥發(fā)酵車間內(nèi)臭氣捕集的問題。目前常用于發(fā)酵車間的排風系統(tǒng)形式有上部吸氣罩排風、誘導通風以及全面排風,還未有實際工程在單個發(fā)酵槽上應用吹吸式通風系統(tǒng)。而吹吸式通風系統(tǒng)常用于工業(yè)槽,但像發(fā)酵槽這類超大尺度陣發(fā)性污染源的槽子,有關(guān)設計計算方法還有待研究,這也是本課題研究的問題所在。首先,通過介紹吹吸式通風的流場理論,分析和對比現(xiàn)有吹吸式通風系統(tǒng)理論計算方法,總結(jié)出每種方法適用范圍以及特點。其次,以本課題工程背景為算例,用現(xiàn)有吹吸式通風系統(tǒng)理論計算方法進行計算,將計算出的各個參數(shù)值建立不同的工況。最后,用CFD數(shù)值模擬技術(shù)建立發(fā)酵槽的幾何模型,在單個發(fā)酵槽上建立吹吸式通風系統(tǒng),對每種方法計算出的不同工況進行模擬分析。本課題主要研究的結(jié)論如下:1、針對現(xiàn)有幾種有關(guān)吹吸式通風設計計算方法,將其計算結(jié)果對應的不同工況進行模擬,分析其主要污染氣體的濃度分布云圖和速度分布云圖,找出可以應用在這種大尺度污泥發(fā)酵槽上的吹吸式通風計算方法,其中新流量比法較適合本工程應用;2、對新流量比法計算結(jié)果的工況進行優(yōu)化設計,改變吹吸式通風系統(tǒng)的影響因素,建立不同的工況,對比不同工況捕集臭氣的模擬結(jié)果得出最佳參數(shù)值:最佳吹風口下沿距槽面距離為0.5m、最佳吸風口下沿距槽面距離為0.3m、最佳出流角度α為20°、最小新流量比為0.4。3、在這類超大尺度的發(fā)酵槽上建立雙側(cè)吹吸式通風系統(tǒng),對比單側(cè)吹吸式通風系統(tǒng)最佳工況的臭氣捕集效率,得出雙側(cè)系統(tǒng)不如單側(cè)系統(tǒng)效率高。
[Abstract]:Urban sewage has increased dramatically, resulting in sewage sludge is also increasing, while the sludge composting was in line with China's national conditions of concern, but because of the odor trapping efficiency is low, become the key of this technology is difficult to spread. Subject to the Zhengzhou city sewage treatment plant sludge as the background, the research sludge compost fermentation workshop odor trapping problem. Commonly used in fermentation workshop exhaust system forms the upper suction hood ventilation, ventilation and induced complete exhaust, there is no practical application in a single fermentation tank push-pull ventilation system. The push-pull ventilation system commonly used in industrial trough, but like the fermentation tank this kind of ultra large scale Paroxysmal Pollution Source trough, the design calculation method remains to be studied, which is also the subject of research. Firstly, through the introduction of push-pull ventilation flow theory, analysis and comparison The existing push-pull ventilation system theory calculation method, summed up the scope of each method and characteristics. Secondly, with the project background as an example, calculated by the existing push-pull ventilation system theory calculation method, the parameters will be calculated to establish different conditions. Finally, simulation geometric model of fermentation tank technology the CFD is used, establishment of push-pull ventilation system in a fermentation tank, simulation analysis is carried out on different working conditions of each method are calculated. The main research topics are as follows: 1, in view of several calculating methods for push-pull ventilation design, the calculation results corresponding to different conditions were simulated, analyzed the main air pollution concentration distribution and velocity distribution, find out the calculation method of push-pull ventilation can be used in the large scale sludge fermentation groove, the new flow ratio method is more suitable for The application of this project; 2, optimize the design of the new method than the calculation results of traffic conditions, changing the influence factors of push-pull ventilation system, the establishment of different working conditions, comparing the simulation results under different conditions to capture odor optimum parameters: the best blowing port along the groove surface distance is 0.5m, the optimal suction outlet the distance from the groove surface is 0.3m, the best flow angle is 20 degrees, the new flow ratio is 0.4.3, the establishment of bilateral push-pull ventilation system in the fermentation tank, this kind of ultra large scale, compared to unilateral optimal conditions for blowing odor suction ventilation system the trapping efficiency, the system is better than unilateral bilateral high efficiency of the system.

【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X703;TU834

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