Filtration Performance Optimization Of Rapid Filter Under The Condition Of Influent With Low-turbidity

As China’s economy continues to develop, urban construction is picking up speedly and the people improve drinking water safety awareness gradually, to further improve the water quality and water purification plant has become the trend, the state in 2012 to enforce "Life Drinking water hygiene- standards " promulgated early in 2006, the new water quality standards set forth in the finished water turbidity to control the 1NTU below which the corresponding need for improved filter design parameters and operating parameters of the experiment will be the northeast region of the actual Z Waterworks production operation and the establishment of pilot systems combine to give existing plants renovation and new plant operators can refer to the data.First, Pukuai filter air- water backwashing process optimization, this experiment take L18(37) orthogonal experiment to determine the impact factor orthogonal experiment, corresponding to different levels and evaluation of various factors, the use of poor law conduct analysis, the corresponding optimal backwash parameters: first air impact Q gas = 13.02L/(s?m2), T gas = 5min, Q Aiki = 10.85 L/(s?m2), Q combined water = 2.6 L/(s?m2), T co = 1min, Q water = 3.47 L/(s ? m2) and T water = 10 min. And in the best backwash parameters, verify the regeneration filter filtering capabilities, while early drainage water filtration process analysis.Secondly, the optimum operating point filter to optimize research, conducted experiments at different filtration rate, taking the water at different depths and analyze the water quality, according to the water quality after water samples was analyzed for optimum filtration rate obtained to 9m / h, is determined to reach a pressure filter at the same time period and water cycle, filter the highest economic operation, and the water quality is better this principle, the drawing and other turbidity curve and the curve of the head, etc., to find the optimal work point, considering the cycle of water production this factor is given the most work points corresponding parameters: filter diameter of 0.95 mm, filtration rate of 9m/h, filter thickness of 80 cm, filtration cycle is 51.7h, turbidity is 1NTU, head loss is 150 cm.Finally, the establishment of evaluation index π Theorem FS filter filtration performance, and give their assessment of the pilot system with FS filtration performance, determine the best sample performance on the 16 th, while taking advantage of the filter backwash way to classify different filter technical economic analysis, the production capacity in the filter run the same age and the same equipment, filter arrangement and related technical conditions are the same, gas- water backwash highest economy, the overall cost is 91.63%% of the homogeneous media filter 55.86% of the ordinary rapid filter.