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Research on Characteristics of Baffled Homogenize Pool

Author: HuXuLiang
Tutor: ZhangXinXi
School: Anhui University of
Course: Environmental Engineering
Keywords: Baffled Quenched pool Structure Mathematical model The effect of quenched and tempered
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 18
Quote: 0
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Abstract

Urban sewage emissions and water quality fluctuates with the rest rules, industrial wastewater emissions and water quality will fluctuate with the production process, such water quality, water fluctuations sewage purification facilities will have varying degrees of impact. To adjust pool as regulating water quality, quantity structures, its regulation will directly affect the performance advantages and disadvantages of the treatment effect of subsequent treatment facilities. Existing regulation pool design is mainly based on statistical models or materials constant calculation model, these models ignore constructed swapped qualitative effect of the cell body, not an accurate description of the various pool-quenched and effect. In order to improve the effect of quenched and tempered, design a variety of different structures of quenched and tempered pool, but not established to meet the specific structure of the pool-quenched and principles and the corresponding mathematical model. In this paper, three different internal structure Baffled Quenched pool as the research object to establish the mathematical model contains a the Quenched pool structure parameters; production of the corresponding test device; validation test, and emphasis on the tracer diffusion and dead zones be amended; compared using analysis of variance on different internal structure Baffled quenching and tempering of quenched and tempered pool effect; transformation of a coking plant and the research applied to adjust the pool. Through research and practical engineering applications to the following conclusions: 1) different runner mid-stream along which lasted different decomposition of the impact load to reach the time of export, streaming Quenched three different internal structure in the form of discount pool for the object were established export concentration with imports mathematical model of the impact load changes; these models reflect different structural features of the flow channel geometry parameters are included; 2) mass balance model calculation results with reciprocating baffle pool, perforated opposite side baffle pool perforation ipsilateral baffle pool single segment influent test results compared to the deviation of 44%, 33.8% and 26.9%, respectively; compared with four water, the deviations were 16%, 11.2% and 10.9%. Differ from each other by a greater description of the the Quenched pool quenching and tempering effects related to its internal structure, mass balance model is not universally applicable in a variety of pool-type; 3) after the correction of the new mathematical model of diffusion and dead zones, three baffle pool deviation between the calculated and experimental results in the single-stage water by 36% of the pre-revised 27.2% and 30.9%, reduced corrected 14.8%, 14%, 8.7%; the four paragraphs water deviation by 21.4%, 15.2%, 12.1 % to 8.7%, 4.2% and 4%. Corrected deviation decreased significantly, indicating that their impact is significant, wherein the dead zone is the main reason for generating error; 4) in the pool of three deflector, through experiments, when using the single segment influent, modified after the new mathematical model only mass balance model calculated deviation 0.34,0.41,0.32 times; When using four water down at times 0.54,0.38,0.37 deviation. New mathematical model, as amended, to more accurately reflect Baffled pool of quenched and tempered Quenched law; 5) influent concentration was serrated fluctuations, when the influent concentration variance to 1021.1, reciprocating baffle pool, perforation of the opposite side corresponding effluent concentration variance the baffle pool, the perforated the ipsilateral baffle pool single-stage water 197.2,90.98 and 41.9; four water variance 46.39,38.57 and 36.93. Thus, the pool-type structure unchanged, four water quenching and tempering effect is better than single-stage water plus perforated wall can improve the effect of quenched and tempered the the influent same way, under the test conditions, perforation ipsilateral pool four baffle influent best when quenched and effect; 6) a coking plant reciprocating baffle pool implement multi influent, the vertical uniform water distribution transformation, the transformation of the former, the influent COD concentration fluctuations of less than 150mg / L, the effluent COD concentration Basic fluctuations; influent COD concentration fluctuations of more than 400mg / L, the effluent COD concentration with the fluctuations, and fluctuations in the basic rate is not reduced. After the transformation, about 500mg / L influent COD concentration fluctuations reduced to 200mg / L effluent COD concentration fluctuations, the crest the number reduced from six to one, quenching and tempering effect significantly improved.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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