CN114832630A - Stacking method of electric deionized water filtering membrane - Google Patents

Abstract

The invention discloses a stacking method of an electrodeionization water filtering membrane, which comprises the steps of alternately stacking anion and cation membranes and interlayers, taking two surfaces as a group, sequentially and alternately adding welding materials, and then bonding the membranes by corresponding technology to form an isolated multilayer water channel. The stacking method solves the problems of ion content and water flow in water filtration, can effectively control the content of metal ions in domestic water, and achieves the purpose of large-flux healthy water.

Description

A kind of stacking method of electrodeionized water filtration membrane

technical field

The invention belongs to the field of water purifiers, in particular to a stacking method of electrodeionized water filtration membranes.

Background technique

In common membrane filters, in order to achieve the degree of purity, RO membrane occupies an important position, but when RO membrane filters water, it is easy to filter out 80% to 99% of the substances, including all elements that are beneficial to the human body. The phenomenon is not conducive to the growth and development of young users. And limited by the RO membrane material and usage, the effluent flow is relatively small, and the purpose of domestic water cannot be achieved. The existing domestic water filtration methods cannot effectively remove calcium, magnesium and heavy metals in the water, which makes the water equipment such as heaters or boilers easily produce scale. At present, the widely used water softener uses sodium to convert calcium and magnesium in water to achieve the purpose of soft water descaling, but it will discharge high-sodium salt water into the sewers, which will salinize the soil and cause damage to the environment.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a method for stacking electrodeionized water filtration membranes, which can not only solve the problem of effectively controlling the proportion of ions contained in the water flow, but also meet the requirements of large flux of water flow, and can also ensure that water mixing does not occur. sealing effect.

In order to achieve the above object, the method that the present invention takes is as follows:

A method for stacking electrodeionized water filtration membranes, that is, the steps of bonding all membrane sheets and interlayers in sequence to obtain an initial ionized water filtration membrane stack include:

Further, the stacking order of all membrane sheets and spacers is anion membrane, spacer, cationic film, spacer, anion film, spacer, cationic film..., or cationic film, spacer, anion film, spacer, Cationic membrane….

Further, the minimum unit of the above stacking method is an anion membrane, a spacer, and a cationic membrane, and the spacer is between the two minimum units.

Further, the welding material is added to the edges of the two opposite sides of the interlayer respectively;

Further, the welding material is added to the edges of the other opposite sides of the next layer of the interlayer respectively, and the previous operation and this operation are repeated in this way.

Further, the spacer layer and the adjacent diaphragms are sequentially bonded by means of hot melt or ultrasonic welding or gluing.

Further, the welding material can be PE, PP or other thin plastics or colloids.

Further, the membrane stack can realize infinite stacking of the smallest unit according to actual needs.

Further, put the bonded membrane stack into a sealed container with a water channel, and connect the positive and negative electrodes to filter the ions of the water flow.

Further, the ion content of the filtered water stream can be controlled by controlling the current intensity or voltage intensity.

Further, keep gaps at the four corners of the membrane stack, and fill the gaps completely with glue when the membrane stack is placed in a sealed container

The beneficial effects of the invention are: forming a membrane stack by sealing the ionized membrane, which can effectively increase the sealing effect of the membrane, increase the flux and improve the filtration efficiency; and adjust the content of ionized water in the purified water by controlling the current.

Description of drawings

Figure 1 is a structural diagram of an ionized water filtration membrane

1. Anionic membrane, 2. Interlayer, 3. Cationic membrane, 4. Welding material, 5. Welding material.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention that are presented in the accompanying drawings are not intended to limit the scope of the invention as claimed, but are merely to identify selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

First, the diaphragms 1, 3 and the interlayer 2 are bonded in sequence. The diaphragms here are mainly the anionic membrane 1 and the cationic membrane 3, and the anionic membrane and the cationic membrane can also be placed upside down. The interlayer 2 is mainly composed of Nylon mesh or other non-metal mesh, the shape of the diaphragm and the spacer is generally quadrilateral, and its corners are notched. The stacking sequence of membranes and spacers is anion membrane 1, spacer 2, cationic film 3, spacer 2, and can be placed cyclically.

Next, add a welding material to the opposite edge of the said partition 2, and add a welding material to the other opposite edge of the next partition 2. The welding materials 4 and 5 are generally PE, PP or other thin plastics or colloids.

Again, repeat the above operation.

Then, the interlayer 2 and the adjacent membrane sheets 1 and 3 are sequentially bonded together by means of thermal fusion.

Finally, the formed film stack can be put into a sealed and fixed container as a whole, and the corresponding corners are filled with glue, and the glue can be epoxy resin.

In the specific operation, a water channel is formed between the smallest unit of anion and cation membranes 1 and 3, the water flow passes between the anion membrane 1 and the cation membrane 3, and the positive and negative ions in the water flow penetrate the anion and cation membranes to the adjacent water channels respectively, but The water flow will not penetrate the anion and cation membranes to the adjacent water channels, and the sealing effect of the purified water flow is realized.

In the specific operation, a completely isolated cross-shaped upper and lower water channel is formed in the membrane stack by means of thermal fusion or ultrasonic bonding. There will be no water mixing phenomenon in the waterway in the membrane stack.

In the specific operation, through the matching and docking of the water channels in the membrane stack and the sealed container, the water flow through the membrane stack can go to different drains according to the purified water and waste water, so as to ensure that the water flow will not be mixed with water after passing through the membrane stack.

In the specific operation, the content of the electric ions in the water passing through the membrane stack can be controlled by controlling the magnitude of the passing current/or the magnitude of the voltage of the positive and negative electrodes connected to the sealed container.

In the specific operation, the gaps at the four corners of the membrane stack are filled with glue, which can improve the firmness of the membrane stack in the sealed container, and can also ensure that the passing water flow will not mix water at the four corners of the membrane stack.

Claims (6)

1. The stacking method of the electrodeionization water filtration membrane is characterized in that the step of sequentially bonding all membranes and interlayers to obtain an initial electrodeionization water filtration membrane stack comprises the following steps:

s1: all the membrane sheets and the interlayer are stacked in sequence to form an anion membrane, an interlayer, a cation membrane, an interlayer, an anion membrane, an interlayer and a cation membrane … …, or form a cation membrane, an interlayer, an anion membrane, an interlayer and a cation membrane … ….

S2: the minimum units of the stacking method are an anion membrane (1), an interlayer (2) and a cation membrane (3), and the interlayer (2) is arranged between the two minimum units;

s3: adding welding materials (4) on the edges of the two opposite sides of the interlayer respectively;

s3: respectively adding welding materials (5) to the edges of the other two opposite sides of the next interlayer, and repeating the previous operation and the current operation in a crossed manner;

s4: the interlayer and the adjacent membranes are sequentially bonded by hot melting or ultrasonic welding or gluing.

2. The stacking method of electrodeionization water filtration membranes as claimed in claim 1, wherein the frit is PE, PP or other thin plastic or gel.

3. The stacking method of electrodeionization water filtration membranes according to claim 1, wherein infinite stacking of the smallest unit can be achieved according to practical needs.

4. The stacking method of electrodeionization water filtration membranes according to claim 1, wherein the bonded membrane stack is placed in a sealed container having water paths, and the positive and negative electrodes are connected to filter the electric ions of the water flow.

5. The stacking method of electrodeionization water filtration membranes according to claim 1, wherein the ion content of the filtered water stream is controlled by controlling the current/voltage intensity.

6. The stacking method of electrodeionization water filtration membranes according to claim 1, wherein notches are reserved at four corners of the membrane stack, and the notches are completely filled with the glue when the membrane stack is placed in the sealed container.

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