A water-saving nanofiltration membrane element

Abstract

The invention discloses a water-saving nanofiltration membrane element, which comprises a membrane element body, and the membrane element body consists of a central tube, a through hole, a winding jacket, a water inlet wind flow grid one, a diaphragm, a permeation collection grid and an inlet water Two wind flow grids, the central tube is provided with a through hole, the water inlet air flow grid two is arranged outside the central tube, and a diaphragm is arranged outside the water inlet air flow grid two, and the diaphragm is dislocated and folded in half into two pieces, the permeation collection grid is placed between the folded diaphragms, the diaphragm is provided with a water inlet wind flow grid one, and a winding jacket is arranged outside the water inlet wind flow grid one; the present invention adjusts the two The distance between the movable plates, together with the guide wheels, is convenient for guiding the components of different widths, so that the winding effect is better; by rotating the adjusting bolt, the height of the pressure roller is adjusted so that the spring is in a natural state, and the pressure roller and the components are in contact with each other. Hold, so that the components are rolled more tightly and not loose.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membrane elements, in particular to a water-saving nanofiltration membrane element. Background technique [0002] In recent years, the membrane separation process, as a new type of high separation, concentration, purification, and purification technology, has been widely used in seawater purification, sewage treatment, and pure water manufacturing. Membrane separation technology is a separation method that uses a specially manufactured membrane with selective permeation performance to separate, purify and concentrate the mixture under the push of an external force. The property that a substance cannot pass through. Membrane separation technologies are generally divided into four categories: microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). Nanofiltration membrane is a functional semi-permeable membrane that allows solvent molecules or some low-mole...

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Problems solved by technology

[0003] In the existing nanofiltration membrane elements, since the grid-shaped plastic net and the membrane are directly wound on the plastic tube, the pure water is transmitted and collected slowly during use, and the utilization rate of the membrane is low, resulting in unnecessary Necessary waste of resources, slow flow rate, and low water production efficiency; and when making nanofiltration membrane elements, a winding mechanism is required to wind it, but the existing winding mechanism is not convenient for winding two sets of elements at the same time, and does not It is convenient to adjust the height of the pressure roller, so that the element winding is more compact and not loose, and it is not suitable for elements of different widths

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