A method for optimizing the matching of the flow component of a high-pressure seawater desalination pump

Abstract

A method for optimizing the matching of flow component of reverse osmosis seawater desalination high-pressure pump features that the geometrical parameters of impeller, guide vane and anti-guide vaneare optimized. The method includes the following steps: first, the Latin square test design is used to obtain the multi-scheme design of the high-pressure seawater desalination pump, and then the sensitivity analysis of the pump multi-parameters is carried out, and the rule that the optimization objective is affected by the variation of these factors is explained by changing the numerical value ofthe relevant design variables one by one. At the same time, the response surface test design method is used to design several groups of test plans, and the function of the quadratic term between theoptimization objective and the design variables is established, and the quadratic regression analysis is carried out, so as to obtain the design variables which significantly affect the pump performance and remove the design parameters which have little influence on the pump performance. Thirdly, a PSO intelligent optimization algorithm is used to realize the automatic optimization of the performance. After many iterative calculations, the optimal parameter combination of the over-current components can be obtained in the global scope, and the performance matching design of the over-current components can be realized.

Description

technical field [0001] The invention relates to the field of seawater desalination systems, in particular to a matching optimization design method for flow-passing components of a reverse osmosis seawater desalination high-pressure pump. Background technique [0002] Seawater desalination is an important way for coastal countries around the world to solve the shortage of freshwater resources. With the rapid development of island development, ocean-going ships, drilling platforms and other fields, the demand for seawater desalination devices has soared. Reverse osmosis seawater desalination equipment has become the most commonly used seawater desalination equipment because of its small footprint, low energy consumption, and low driving energy demand. Seawater desalination high-pressure pump is one of the three key equipment in reverse osmosis seawater desalination. Its operating energy consumption accounts for 40% to 80% of the total energy consumption of the device, and is ...

AI Technical Summary

Problems solved by technology

However, the core technology of high-pressure multi-stage centrifugal pumps is monopolized by foreign countries, and the pump equipment is very expensive. Therefore, large-scale seawater desalination high-pressure centrifugal pumps are one of the key equipment that urgently needs to be overcome in the development of large-scale reverse osmosis seawater desalination technology in my country.

[0003] The semi-empirical and semi-theoretical design method cannot meet the high-efficiency design requirements of pumps, especially for multi-stage centrifugal pump structures, resulting in problems such as mismatched hydraulic design of flow-passing parts, large flow losses, and high energy consumption in operation.

In addition, the current optimization design research mainly focuses on the optimization of the geometric parameters of a single hydraulic component under the design conditions of the pump, and the performance matching optimization design of the flow-passing components is not perfect, resulting in large flow losses and failure to achieve efficient operation.

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