Reverse osmosis water-saving and capacity-expanding system

Abstract

The invention relates to a reverse osmosis water-saving and capacity-expanding system which comprises a primary reverse osmosis system and a secondary reverse osmosis system, wherein the water inlet end of a second high-pressure pump is respectively connected with a primary reverse osmosis concentrated wastewater tank and a water outlet pipe of a carbon filter device. According to the reverse osmosis water-saving and capacity-expanding system, when the second high-pressure pump pumps water in the first-stage reverse osmosis concentrated wastewater tank into the second-stage reverse osmosis device for reverse osmosis treatment; the system can recycle first-stage reverse osmosis concentrated wastewater, concentrated wastewater is produced through second-stage reverse osmosis, and the water consumption is reduced; when the second high-pressure pump pumps water in a tap water raw water tank into the second-stage reverse osmosis device for reverse osmosis treatment, the system can realize water production capacity expansion and increase the water yield; a water saving mode and a capacity expansion mode can be freely switched.

Description

technical field [0001] The invention relates to the technical field of reverse osmosis, in particular to a reverse osmosis water saving and capacity expansion system. Background technique [0002] The reverse osmosis system consists of a reverse osmosis membrane (RO), a high-pressure pump and a security filter set up to protect the reverse osmosis membrane. [0003] The basic working principle of reverse osmosis is: use a special high-pressure water pump to add raw water to a pressure of 6-20 kg, so that the raw water will permeate through the reverse osmosis membrane with a pore size of only 0.0001 micron under the action of pressure. Chemical ions, bacteria, fungi, and virus bodies cannot pass through, and are discharged with wastewater, and only water molecules and solvents with a volume smaller than 0.0001 microns are allowed to pass through. In the existing reverse osmosis design, both the first-level concentrated wastewater and the second-level concentrated wastewater...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a reverse osmosis water-saving and capacity expansion system in view of the waste of water resources in the existing reverse osmosis system where both the first-level concentrated wastewater and the second-level concentrated wastewater are discharged.

Images