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Water Treatment Works Integrated Application of Comprehensive Water-saving Model

Author: JiangJinZuo
Tutor: XuYongPeng
School: Harbin Institute of Technology
Course: Urban Water Resources
Keywords: Urban water plants Since water Water-saving Model
CLC: TU991.64
Type: Master's thesis
Year: 2010
Downloads: 99
Quote: 0
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Abstract

Urban water plants is an important infrastructure in the national economy, urban water plants in the process of production of tap water since the water will consume a large amount. Existing water supply plant, the prevalence of water use efficiency is not high, wasting more serious phenomenon, China's urban water supply plant has a large water-saving potential. First surveys since water consumption of urban water supply plants in different regions of China, summed up the water process since the law of water consumption, water saving, the structures proposed cost-effective water-saving strategy; Secondly, to study the construction of a wastewater recycling The laws governing the operation of the water supply plant, to supplement and improve urban water plants water-saving model; Finally, integrated water-saving model study was carried out in three has a water supply plant recycling system, to verify the accuracy of the model, sensitive and guidance. The study of water supply plants to reduce water consumption, save energy, reduce production costs, etc. to promote the significance. This paper since the water consumption of 47 water supply plants collected in the eastern part of the investigation, analysis 1) different regional urban water plants since the type of process units of water consumption characteristics, since water consumption characteristics, analyze the impact of factors; 2 water plants since the water consumption rate of) water supply plant in the flocculation and sedimentation tanks pool-type structure and the row of mason conditions, sludge water containing solid rate; 3) a pool-type structure of the water supply plant filter backwash proportion of backwash water consumption rate, backwash effect; 4) at this stage of urban water plants built since water wastewater reuse process and process characteristics. The survey results show that: the smaller coagulation pool of mud water, minimum water consumption rate, excluding the northeast region low temperature and low turbidity large amount of dosage, the coagulation tank water consumption rate is generally less than 0.5%; the precipitated mud water center water consumption rate is generally in the range of 0.6% -3%; filtered water backwash water up, generally higher than 2.5%. Advection sedimentation pond water consumption rate of between 1.0% -3.0% the inclined plate inclined tube sedimentation tank water consumption rate of 0.5% -2.0%, the use of mechanical mud sedimentation tanks, water consumption rate is less than gravity mud The water consumption rate. V filter water consumption rate to less than Pukuai / double valve filter. Pukuai filter transformation into the air-water backwash water consumption rate has dropped by nearly 1%. Built back to imbalances in the distribution system of water supply plant, mainly concentrated in the economically more developed regions, and most of them are using direct reuse. The comparative analysis of several regions, the average of the highest urban water plants in Northeast China's water consumption rate, up to 6%, the Shenzhen area's average water consumption rate is relatively low, about 3%. Urban water supply plants since water consumption research and analysis on the basis of in-depth study of the urban water plants since the water main unit consumption optimization of water-saving strategies, and to further improve the water-saving model of the original urban water plants, and added on reuse content of the system is assessed. Improve integrated water-saving model of urban water plants three basic modules: (1) since the water status quo comprehensive evaluation module, mainly including sludge water backwash water consumption rate of calculation reuse water reuse rate is calculated, as well as analysis and evaluation of the processing unit water consumption rate of water-saving potential. (2) processing unit to optimize the water-saving control module, the module including mud mud cycle unit, which lasted optimization and mud, filter backwash cycle duration and backwash mode optimization, as well as the reuse unit reuse process selection and reuse the optimization of operating parameters. (3) After the transformation efficiency indicators assessment module, including before and after reconstruction of water treatment plant wastewater emissions changes caused by the assessment of the environmental benefits and economic benefits, as well as urban water supply plant has a recycling unit to save water by calculating its resource costs, consumption running costs, and to assess the water plant back to the economic benefits of the unit. Shenzhen area S, L, M three water supply plants in the urban water plants water-saving model results show that, by adjusting the process operating parameters of the unit, as well as run-control unit on the main water, urban water supply production plants since water a comprehensive reduction target. Component units due to the scale of construction of three water reuse systems are different, so the economic benefits of the three water reuse process compared assessment results show that the environmental and economic benefits of the transformation M waterworks made M waterworks reduce mud water 4.7041 million m3 / a, saving production costs 4.1912 million yuan / a, to produce a cubic meter of water costs by 0.026 yuan. L waterworks reuse process economic benefits the most obvious recovery of 75.01% since water savings of 1,264,300 yuan annually for the water plant, system water costs by 0.025 yuan / m3. The results show that in the raw water costs, long-distance water diversion areas, the design of the water supply plant construction should adopt the reuse process, not only can save more than 60% since water waterworks solve also bring greater economic benefits. Further improve the integrated water-saving models fully embodies the production application functionality, accurate, sensitive and highly instructive model applied research is also further evidence of the feasibility of its application in the production of a water supply plant.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works ) > Operation and management of the waterworks ( water supply system,water plant ) > Water conservation measures
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