Method for controlling stability of water quality of desalinated sea water and tap water mixed in municipal water supply network
A technology of water quality stability and control method, which is applied in the direction of water supply equipment, water supply equipment, neutralized water/sewage treatment, etc., can solve the problems of difficulty in ensuring the water quality safety of municipal pipe networks, lack of water quality stability control technology, etc., to achieve Realize the control of water quality stability and the effect of high practical value
Inactive Publication Date: 2013-09-04
TIANJIN UNIV
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Problems solved by technology
[0005] Due to the influence of factors such as the source of tap water, changes in water quality, and the degree of corrosion of the existing pipe network, it is difficult to ensure the safety of the water quality of the municipal pipe network when desalinated water and tap water are mixed into the municipal water supply pipe network. There is a lack of effective water quality stability control technology, and there are few examples of successful application in actual desalinated water transmission and distribution
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[0039] Take the seawater desalinated water produced by low-temperature multi-effect distillation of Tianjin SDIC Beijiang Power Plant and the tap water produced by the traditional treatment process of Hangu Water Plant as examples.
[0040] 1. Carry out pipe network test to determine the blending ratio and pH conditioning range.
[0041] Simulate the actual pipe network and build a small-scale test pipeline. The pipe material is cast iron pipe. The raw water is desalinated water produced by low-temperature multi-effect distillation of Beijiang Power Plant and tap water produced by traditional treatment process of Hangu Water Plant. The mixing ratio of desalinated water and tap water is from 1:1 to 1:5, while taking pure desalinated water and pure tap water as references, adjust the pH to 7.5, 8.0, and 8.5, respectively. The running time of the pipeline is 12 hours, and samples are taken every 1 to 2 hours. The main detection indicators of water samples include: turbidity, tota...
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The invention provides a method for controlling stability of water quality of desalinated sea water and tap water mixed in a municipal water supply network. The control method comprises the following steps: firstly, simulating an actual pipe network by constructing a small-size test pipe network, and determining a mixing ratio and a pH adjusting scope; on the basis of data of the test pipe network, utilizing a multiple linear regression method to establish a multiple linear relation model between an iron releasing rate of water in the pipe network and multiple water quality indexes, wherein the multiple linear relation model is used to forecast the water quality of water in pipe network after the desalinated sea water enters the municipal water supply network and supply a technical measure for controlling the release of iron in water in the pipe network. After the technical scheme provided by the invention is successfully applied to a demonstration project of transferring and distributing the desalinated sea water produced from Tianjin Guotou Beijiang power plant to the Hangu municipal pipe network, the desalinated sea water and tap water are successfully mixed in the municipal pipe network. According to the method provided by the invention, the stability of water quality of the water in the pipe network is controlled after the desalinated sea water and the tap water are mixed, and meanwhile, the innovation of a technical method for mixing the desalinated sea water and the tap water in the municipal pipe network is realized.
Description
technical field [0001] The invention belongs to the technical field of water quality stability control of municipal water supply pipe networks. It is especially suitable for the water quality stability control method of mixing desalinated water and tap water into the municipal water supply pipe network. Background technique [0002] my country is a country with a shortage of water resources. In coastal areas, various new water sources are being developed to replace traditional surface water and groundwater, such as diverted water from the Yellow River, diverted river water, and desalinated water. Among them, in addition to traditional surface water, seawater is an important choice for coastal cities to choose alternative water sources. Therefore, with the sustainable development of cities in our country, the utilization of desalinated water will become the development trend of comprehensive utilization of multiple water sources in many cities, especially coastal cities. ...
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IPC IPC(8): E03B1/02C02F1/66
Inventor 赵鹏黄纯凯田一梅董琪张宏伟
Owner TIANJIN UNIV