Reverse osmosis water purification machine and reverse osmosis water purification system

Abstract

The invention discloses a reverse osmosis water purification system which comprises a preprocessing device, a pressurizing device and a reverse osmosis membrane filtration device which are sequentially connected in series with a raw water passage, wherein a thick water branch and a clear water branch are arranged on the reverse osmosis membrane filtration device. The system also comprises a water quality detection device which is connected in series with the raw water passage, is arranged behind the preprocessing device and is used for detecting the TDS (total dissolved solid) value of raw water, an opening-adjustable flow valve arranged on the thick water branch, an adjusting device for adjusting the opening of the flow valve, and a controller for controlling the flow valve to keep first opening when the TDS value is not more than a preset value and controlling the flow valve to keep second opening when the TDS value is more than the preset value. According to the system, the waste of water resources can be effectively avoided and the service life of a reverse osmosis membrane can be effectively prolonged. The invention further discloses a reverse osmosis water purification machine provided with the reverse osmosis water purification system.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a reverse osmosis water purifier and a reverse osmosis water purification system. Background technique [0002] Reverse osmosis technology is a membrane separation technology that uses pressure difference as the driving force to separate the solvent from the solution. Apply pressure to the solution on one side of the membrane. When the pressure exceeds its osmotic pressure, the solvent will permeate against the direction of natural infiltration, so that the permeated solvent, that is, the permeate, will be obtained on the low pressure side of the membrane; the high pressure side will obtain A concentrated solution is a concentrated solution. [0003] The reverse osmosis water purification system is a system that uses reverse osmosis technology for water purification treatment. Usually, the reverse osmosis water purification system includes a pretreatment device, a booste...

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Problems solved by technology

[0004] The current reverse osmosis water purification system generally adopts a fixed wastewater ratio. The ratio of wastewater to purified water in different reverse osmosis water purification systems is about 1:3-1:1, but this ratio is not universally applicable. In areas with good water quality, it will cause waste of water resources, while in areas with poor water quality, the proportion of wastewater is relatively small, which will lead to insufficient rapid and thorough flushing of reverse osmosis membranes, and accelerated pollution, thus making the reverse osmosis membranes The lifespan is shortened. Even if the ratio of wastewater to clean water is adjusted in advance according to the differences in water quality in various regions, it will inevitably lead to waste of water resources and reverse osmosis due to changes in water quality in the system caused by regional water quality fluctuations or concentrated water backflow. Unreasonable use of membrane

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