Method for regulating flux balance degree of components in cascade pressurized seawater desalination system

A system component and cascade technology, applied in general control systems, control/regulation systems, chemical instruments and methods, etc., can solve problems such as flux imbalance and uncontrollability in reverse osmosis desalination systems

Active Publication Date: 2020-07-28
TIANJIN CHENGJIAN UNIV
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Problems solved by technology

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for regulating the flux balance degree of cascade pressurized seawater desalination system components, so as to solve the problem of unbalanced and uncontrollable flux of reverse osmosis seawater desalination system

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  • Method for regulating flux balance degree of components in cascade pressurized seawater desalination system
  • Method for regulating flux balance degree of components in cascade pressurized seawater desalination system
  • Method for regulating flux balance degree of components in cascade pressurized seawater desalination system

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Embodiment Construction

[0030] The method for adjusting and controlling the flux balance degree of elements of the cascaded pressurized seawater desalination system according to the present invention will be described below with reference to the accompanying drawings.

[0031] Because the flux slope range designed in the method for adjusting and controlling the flux balance degree of cascade pressurized seawater desalination system components of the present invention is between -2.5 and 0, different flux slopes are selected in this range, and the calculation methods are all consistent. This method can achieve the purpose of regulating the flux balance of the components of the cascade pressurized seawater desalination system.

[0032] Therefore, in the example, multiple system flux slopes are not selected for calculation, and only the system flux slope -0.60 is set as a representative for calculation. The specific calculation process is as follows:

[0033] Such as figure 1 As shown, on the basis of ...

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Abstract

The invention provides a method for regulating the degree of flux balance of components of a cascade pressurized seawater desalination system. On the basis of the structure of the cascade pressurized seawater desalination system, for the outer diameter of an impeller of a cascade pressurized pump, cutting volumes of the outer diameter of the cascade pump under different operating conditions and at different pressurized positions are calculated and a centrifugal pump motor is used for variable frequency auxiliary adjustment so that the system component flux is in linear distribution and the component flux slope is controllable. The method of the invention has the effect of achieving the purpose of regulating the flux of each component by the way of cutting the outer diameter of the impeller of the cascade pressurized centrifugal pump in the system and the frequency modulation of the motor. The method of the invention can be applied to effectively solve the problem of flux imbalance and uncontrollable component flux balance degree of the cascade pressurized seawater desalination system, is conducive to optimizing the flux balance of a reverse osmosis seawater desalination system, and plays an active role in the development of the reverse osmosis seawater desalination system.

Description

technical field [0001] The invention relates to the field of seawater desalination, and relates to a method for adjusting and controlling the flux balance degree of components in a cascade pressurized seawater desalination system. Background technique [0002] As an irreplaceable natural resource, water resources play an important role in economic development and people's lives. my country is a serious water-short country, and a large amount of industrial and agricultural sewage is discharged into natural water bodies, causing huge environmental problems and making the supply and demand of water resources more tense. Seawater desalination technology is committed to solving the shortage of fresh water resources. In recent years, the reverse osmosis membrane method has been widely used as a major seawater desalination technology because of its stable and reliable engineering and low cost. [0003] However, there is a serious flux imbalance problem in the reverse osmosis syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04C02F1/44C02F103/08
CPCC02F1/441C02F2103/08G05B13/042Y02A20/131
Inventor 苑宏英陈玉坤靖大为许尧
Owner TIANJIN CHENGJIAN UNIV
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