Secondary chlorination method based on node water age

Abstract

The invention provides a secondary chlorination method based on node water age. The method comprises the following steps: optimizing the water-weighted residual chlorine age of a whole pipeline network as a minimum target function under a given number of chlorination points to obtain an optimal secondary chlorination location; then optimizing the minimum chlorination amount by taking the percentage of qualified water and the economic type as objective functions to obtain a Pareto curve of the relationship between chlorination amount and qualified water; finally, realizing specific reliabilityof the water quality of the pipeline network and the minimum chlorination amount at least when the qualified water amount is specified under uncertain conditions.

Description

technical field [0001] The invention relates to a method for optimizing the secondary chlorine addition of a water supply pipe network, in particular to a method for effectively selecting a chlorine addition point and a chlorine addition amount of a water supply pipe network based on node water age. Background technique [0002] In 1974, Rook and others detected trichloromethane (THMs) in chlorinated high-color water and confirmed its carcinogenicity. Subsequently, the U.S. Environmental Protection Agency investigated tap water from different water sources in more than 80 major cities in the United States. , and finally confirmed the widespread presence of THMs in tap water after chlorination. Since then, researchers have begun to conduct a large number of studies on chlorine disinfection and disinfection by-products (DBPs). So far, more than 500 types of disinfection by-products in drinking water have been discovered and are still increasing. In addition, a number of studi...

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Problems solved by technology

However, in the actual secondary chlorination process, a very small number of them select the chlorine dosing point with better properties and optimize the chlorine dosing amount through theoretical calculations. Most of them directly set the dosing point at the pump station because of the convenience of operation. Although this This method is simple and easy to implement, but from a long-term point of view, it does not fully bring out the advantages of secondary chlorination. Therefore, according to a suitable method, select a suitable chlorination position to ensure that the amount of chlorination is saved and at the same time ensure The safety of water supply is a problem worth studying

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