Operation optimization method of full flow roll type reverse osmosis seawater desalination system

Abstract

The invention discloses an operation optimization method of a full flow roll type reverse osmosis seawater desalination system. According to the reverse osmosis mechanism of the seawater desalination system and structure of the whole process, the method establishes an accurate model of whole process reverse osmosis water production and storage process in a strict mechanism mode, the model is described by differential algebraic equations, the water production process and the water supply process are connected, and buffer action of the reservoir and step change of power price are used to reduce overall operating costs. In order to solve the optimized proposition described in a differential algebraic form brought by precise modeling, simultaneous solution technique is employed to solve the optimized proposition. The invention integrally considers a variety of variable parameters influencing factors of the seawater desalination system, a whole process system process model with variable parameters is established, and simultaneous solution technique is used for researching operation optimization of the seawater desalination system, so as to further reduce the operation cost of the seawater desalination system.

Description

Technical field [0001] The invention belongs to the treatment field of water, waste water, sewage or sludge, and specifically relates to optimizing the operation of a roll-type reverse osmosis seawater desalination system to make the system run at the most economical operating point, so that the average daily operating cost of the system is the lowest. Background technique [0002] Desalination technology is one of the most effective ways to alleviate the freshwater crisis. The technology is mainly divided into two categories: distillation and reverse osmosis. Distillation is mainly used in large-scale desalination treatment and places with abundant heat energy. The reverse osmosis membrane method is widely used due to its wide application area and high efficient salt rejection rate. [0003] Reverse osmosis uses a semi-permeable membrane to separate two solutions of different concentrations. The solvent in the low-concentration solution automatically permeates through the semi-...

AI Technical Summary

Problems solved by technology

However, the existing research mainly considers the optimization of system design, less about the operation optimization, and insufficient consideration of the dynamic changes and uncertainties of various operating conditions of the existing seawater desalination system

For the actual seawater desalination system, both seawater temperature and salt content fluctuate with time; electricity prices also have great time differences; and in order to avoid the complexity of modeling and the difficulty of solving, in the past, the model description generally Using a simple lumped parameter method to describe, although simple but with low precision, the accuracy of the optimization results is not enough

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