Method based on intermediate water channel for determing impurity concentration and water supply network

Abstract

A method for determining impurity concentration on the basis of intermediate water way includes such steps as calculating the fresh water volume needed by all the units, calculating the water-saving potential of the whole water network, sorting all the units according their extreme concentrations of discharged water, accumulating the maximal water consumption, calculating the difference between the said water-saving potential and the accumulated value, determining the imtial concentration of each component in intermediate water way by the maximal concentration value of each component when the absolute different is minimal, configuring the network according to the said initial concentration, and regulating the concentration in intermediate water way. Its advantages are no direct link between units, and simple design and control of the water network.

Description

1. Technical field [0001] The invention belongs to process system integration technology, and in particular relates to a method for determining the impurity concentration based on an intermediate water channel and an intermediate water channel network structure. 2. Background technology [0002] The current water network structure is to directly connect each unit with pipes, and there are two main design methods used: graphic method (pinch method) and mathematical programming method. These two methods cannot guarantee the optimal solution for large multi-component impurity systems. And for large-scale water networks with many water units, the water network is too complex and inconvenient to operate and control. When the water quantity and water quality of one water unit change during production, it will affect the operation of other water units. Water is adjusted, and the water-saving effect is reduced. The disadvantages of the above two methods are: 1. The design work is ...

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Problems solved by technology

Neither of these two methods can guarantee optimal solutions for large multi-component impurity systems.

And for large-scale water networks with many water units, the water network is too complex and inconvenient to operate and control. When the water quantity and water quality of one water unit change during production, it will affect the operation of other water units. The water is adjusted, and the water saving effect is reduced

The disadvantages of the above two methods are: 1. The design work is more difficult: the use of the graphical method (pinch method) needs to draw a pinch diagram, which is a very complicated task for a multi-component system, and the designed network It is necessary to break the loop for simplification, and the quality of this work largely depends on the experience of the designer; the mathematical programming method is not only computationally intensive but also cannot guarantee optimality; 2. For large-scale systems, the obtained network It is very complicated and difficult to control; 3. Insufficient network elasticity: the direct connection between the units means that the local changes require the corresponding changes of the whole, which is not advisable for an actual operation process

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