Study On Ventilation And Deodorization Technology In Dehydration Room Of Underground Sewage Treatment Plant

Ventilation technology has been playing an important role in improving the indoor environment.With the proliferation of underground sewage treatment plants,the distance between sewage treatment plants and people is getting closer and closer,making people pay more attention to the environmental problems brought.The odor gases emitted can lead nausea to people and poison the human body.Therefore,necessary ventilation measures must be taken to control the concentration of odor in the sewage treatment plant.And it is necessary to thoroughly study the influence of ventilation on the odor pollution of underground sewage treatment plants and the ventilation and energy-saving control strategies.In order to analyze the distribution characteristics of odor in underground sewage treatment plants,the dissertation took the sludge dewatering equipment room with the most serious foul odor in the underground sewage treatment plant as the research object,and analyzed the distribution characteristics of NH₃ in the dehydration engine room using on-site sampling measurement and numerical simulation.Severe NH₃ distribution area and maximum concentration.In order to better control the odor concentration in the dehydration room and determine the key factors that affect the odor concentration,the paper used the orthogonal test and numerical simulation method to analyze the temperature,humidity and exhaust capacity of the sludge dewatering plant in the underground sewage treatment plant.The impact weight of concentration,after determining the most influencing factors,further analyzed the relationship between the main influencing factors and the dehydration room NH₃ concentration and ventilation energy consumption,and then optimized the exhaust air volume through a comprehensive evaluation index.Finally,a reasonable amount of air flow in the sludge dewatering plant was determined.Finally,a technical and economic analysis was performed by means of fuzzy mathematics.In order to further improve the deodorization efficiency and improve the air quality of underground sewage treatment plants,the effect of air supply on the odor control of underground sewage treatment plants was investigated.On the basis of conventional air supply forms,a three-dimensional air supply system was introduced.The numerical simulation method was used to compare and analyze the deodorization effect of three-dimensional air supply and conventional airflow organization in the dehydration engine room.The effects of different delivery and exhaust moded on the emission efficiency and odor concentration in the engine room were studied,and the dewatering room of the underground sewage treatment plant was finally determined.The best form of air supply.For achieving the same indoor environment quality,the required air supply volume,exhaust air volume,and other technical input cost vary widely.Therefore,the technical and economical analysis of the ventilation and deodorization system was particularly important.Moreover,from the perspective of fuzzy mathematics,the paper carried out a scientific comprehensive evaluation of the ventilation system's plan from the five goals of the discharge efficiency,the average concentration of the environment,the average concentration of the work area,energy consumption and investment,to adapt to different needs.