A water purifier and its reverse osmosis membrane element

Abstract

The invention discloses a reverse osmosis membrane element, comprising a water inlet screen, a reverse osmosis membrane and a pure water diversion cloth superimposed and wound on a central water production pipe. The grid of the flow channel, the thickness of the flow channel grid of the water inlet screen near the water production end is not less than the thickness of the flow channel grid of the water inlet screen near the water inlet end. The thickness of the flow channel grid of the water inlet screen close to the water production end is set to be no less than the thickness of the flow channel grid of the water inlet screen close to the water inlet end, so as to improve the anti-pollution ability of the water production end. When working, when the raw water passes through the inlet screen, due to the different thickness of the wire, it is easy to form turbulent flow, which accelerates the driving force and mass transfer effect of solute transfer, and improves the separation efficiency of the reverse osmosis membrane. Turbulent flow can prevent the deposition of pollutants, reduce concentration polarization, improve the anti-pollution performance of the membrane, and prolong the life of reverse osmosis membrane elements. The invention also discloses a water purifier with a reverse osmosis membrane element.

Description

technical field [0001] The invention relates to the technical field of drinking water purification, in particular to a water purifier and a reverse osmosis membrane element thereof. Background technique [0002] Household reverse osmosis membrane elements use ultra-static pressure pumps to generate high-pressure osmosis, allowing water molecules and ionic mineral elements to pass through the reverse osmosis membrane, while most of the heavy metals, organic matter, bacteria, and viruses dissolved in water cannot pass through. The reverse osmosis membrane is intercepted, and the impure substances contained in the water, such as pyrogens, filtering viruses, bacteria, toxins, compounds, heavy metals (arsenic, cobalt, cadmium, mercury, etc.) , free ions and other substances harmful to human health. The reverse osmosis membrane isolates the impurities from the pure water and produces pure drinking water. [0003] At present, the commonly used roll-type reverse osmosis membrane e...

AI Technical Summary

Problems solved by technology

[0004] Since the concentration of concentrated water at the product water end of the reverse osmosis membrane element is higher than that at the water inlet end, and the water inflow at the water product end is smaller than that at the water inlet end, the concentration polarization phenomenon of the membrane surface at the water product end is more serious than that at the water inlet end. Accelerated fouling of membrane components, resulting in attenuation of performance, decreased quality of purified water, and reduced service life

Images