A reverse osmosis system and concentrated water circulation control method

Abstract

The invention provides a reverse osmosis system comprises a water inflow solenoid valve (hereinafter referred to as valve), a storage tank, a high-pressure pump (hereinafter referred to as pump), a reverse osmosis device, a detection device (hereinafter referred to as detection device), and a controller. The storage tank is connected with the reverse osmosis device via the pump. The reverse osmosis device is connected with the storage tank via a pipeline. The valve, the detection device, and the pump are connected with the controller. The controller, when receiving a water production control instruction, switches on the valve, and the detection device detects and receives a water production volume parameter. A method comprises steps of: sending to the pump a Nth operating pressure signal (a) in order that the pump operates according to the Nth operating pressure signal; computing the water production volume of the pump operating according to the Nth operating pressure signal depending on the water production volume parameter; when the water production volume reaches a preset water production volume corresponding to the Nth operating pressure signal, regulating the output pressure of the pump to the output pressure corresponding to a (N+1)th operating pressure signal; repeating the (a) until the water production volume reaches a preset value corresponding to a Mth operating pressure signal and then stopping operating. The method saves power consumption.

Description

Technical field [0001] The invention relates to the technical field of reverse osmosis, in particular to a reverse osmosis system and a method for controlling concentrated water circulation. Background technique [0002] The acquisition of water resources and energy utilization have become important factors affecting the development of human civilization. Whether it is from the perspective of scientific and technological progress, economic globalization, or rapid population growth and per capita resource consumption, the world is now in an era of rapid development. Therefore, the use of water resources and energy consumption will become the focus of scientific and technological development. [0003] The recycling of sewage and the development and utilization of new water sources such as brackish water and seawater will become important development areas to alleviate or even solve the water crisis in my country and the world. Membrane treatment technology is currently widely used ...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing RO systems adopt single-stage direct filtration mode, such as attached figure 1 as shown, figure 1 Medium Feed is raw water inflow, Permeate is fresh water outflow, and Brine is concentrated water. Its high energy consumption leads to a lack of competitiveness in operating costs. Therefore, energy consumption has become a bottleneck restricting reverse osmosis technology.

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