Production water control method and device based on electric ball valve adjustment, ultrapure water preparation system

Abstract

The invention discloses a water production control method and device based on electric ball valve adjustment, and an ultrapure water preparation system. The method includes: an initialization step, detecting the full opening and closing time of the concentrated water side drain electric ball valve and the return water electric ball valve, Obtain the unit opening and closing degree of the concentrated water side drainage electric ball valve and the return water electric ball valve; the opening and closing control step is to control the opening and closing of the concentrated water side drainage electric ball valve and the return water electric ball valve according to the unit opening and closing degree, and record the real-time opening and closing degree, And correct the real-time and unit opening and closing degree through the feedback of the detection signal; in the pressure difference calibration step, by adjusting the opening and closing degree of the concentrated water side drainage electric ball valve and return water electric ball valve, the concentrated water side of the reverse osmosis membrane reaches the target flow rate The pressure difference between the inlet side and concentrated water side of the reverse osmosis membrane is used as the target pressure difference; in the linkage adjustment step, the target pressure difference and target flow rate are achieved by adjusting the opening and closing degree of the high-pressure pump, the drainage of the concentrated water side and the electric ball valve of the return water . The invention reduces the cost and improves the control precision.

Description

technical field [0001] The invention relates to the technical field of ultrapure water preparation for medical use, in particular to a water production control method based on electric ball valve adjustment, a water production control device, and an ultrapure water preparation system with the water production control device. Background technique [0002] The ultrapure water preparation system for hemodialysis (referred to as the ultrapure water preparation system in this manual) needs to control the reverse osmosis membrane inlet side pressure and the reverse osmosis membrane concentrated water side flow and pressure to achieve the best use of the reverse osmosis membrane. state, to ensure the quality of ultrapure water for hemodialysis, and to improve the service life of the reverse osmosis membrane. [0003] The existing ultrapure water preparation system uses a manual ball valve on the concentrated water side of the reverse osmosis membrane to control the opening of each ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a water production control method to solve the technical problem that the ultrapure water preparation system in the prior art cannot balance cost reduction and control precision improvement

[0008] Another object of the present invention is to provide a water production control device to solve the technical problem that the ultrapure water preparation system in the prior art cannot balance cost reduction and control accuracy improvement

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