CN204625269U - There is the tap water electrolysis reactor of self-purification function - Google Patents

Abstract

The utility model provides a drinking water electrolysis reactor with self-purification function, which includes a reaction electrode assembly, a reactor shell assembly, a flushing assembly, and a controller; wherein, the reaction electrode assembly is arranged on the reactor shell assembly inside; the controller is respectively connected to the flushing connection port of the flushing assembly and the automatic control valve, and the controller is connected to the electrode terminal of the reactor shell assembly; the controller controls the electrolysis current, voltage, electrode of the reaction electrode assembly) Polarity conversion; at the same time control the opening or closing of the solenoid valve of the automatic control valve, and use the water flow to backwash the reaction electrode assembly. The utility model has the functions of electrode conversion and automatic flushing, and uses titanium-based composite material electrodes to purify raw water without adding any chemical additives, removes pollutants such as heavy metals and microorganisms in raw water, increases dissolved oxygen, improves water quality, and retains raw water Minerals and trace elements beneficial to human health.

Description

Drinking water electrolysis reactor with self-purification function

technical field

The utility model belongs to the technical field of electrolytic reactors for drinking water, and relates to a large-flow controllable self-purifying fast drinking water treatment device without a diaphragm, in particular to a drinking water electrolytic reactor with a self-purifying function.

Background technique

As an electrolyte and solvent, water can be purified by electrochemical methods because it contains a large number of ions and colloidal charged groups. Its basic purification reaction mechanism is:

Cathodic reduction: 2H ₂ O+2e ^- → 2OH ^- +H ₂ ↑

Anodizing: 2H ₂ O-4e ^- → 4H ⁺ +O ₂ ↑

2Cl ^- -2e ^- → Cl ₂

CL ₂ undergoes a disproportionation reaction:

Cl ₂ +H ₂ O→HClO+HCl

Due to the use of iron-based or other electrodes for electrolytic treatment, the electrode reaction is accompanied by other corresponding products, such as the dissolution of the iron electrode, etc., which vary due to different electrode materials. The O ₂ produced by the electrolysis reaction can inhibit the growth of anaerobic microorganisms. HClO has a strong ability to sterilize and kill algae, and can be used for sterilization and disinfection; part of the O ₂ dissolved in water increases the dissolved oxygen content of the produced water. For example, with iron electrodes, the following reactions also occur:

Fe-2e ^- → Fe ²⁺

Fe ²⁺ -e ^- → Fe ³⁺

Fe ³⁺ +3OH ^- →Fe(OH)3↓

At present, there are two common processes for water treatment by electrolysis: one is the use of sacrificial anodes, that is, electrolytic cells made of graphite, iron, stainless steel and other metal electrodes are widely used in the field of sewage treatment, which can play a role in flocculation, Aeration and other functions can effectively reduce the chemical oxygen demand (referred to as "COD") and turbidity and other indicators of sewage, and have the effect of sterilization and disinfection. However, due to the precipitation or dissolution of the anode in the electrolysis reaction, and the low overall treatment selectivity, it is not suitable for the field of drinking water purification. The second is to use the noble metal inert electrode to make an electrodialysis electrolyzer with a diaphragm. Its products are mostly called electrolytic water machines. The cathode produces alkaline water, and the anode produces acidic water. The semipermeable diaphragm is used to separate the acid and alkali water , and then lead out for different purposes. Due to the high requirements for the electrolytic electrodes of water purification and the high price, electrolytic water machines are mostly used for small-capacity production of functional water in households, rather than pure drinking water.

Electrode switching and automatic flushing functions are also not found in the prior art.

Utility model content

The utility model adopts the principle of electrochemistry, and uses titanium-based composite material electrodes, titanium-based precious metal material coating layer electrodes or noble metal (such as platinum) electrodes to purify the raw water within a specific index, without adding any chemical additives, and removes the raw water. Heavy metals, microorganisms and other pollutants can increase dissolved oxygen, improve water quality, retain minerals and trace elements in raw water that are beneficial to human health, and increase electrode conversion and flushing functions. The specific technical solutions are:

A drinking water electrolysis reactor with self-purification function, comprising a reaction electrode assembly (1) and a reactor shell assembly (2), characterized in that:

It also includes a flushing component (3) and a controller (4); wherein,

The reaction electrode assembly (1) includes a reaction electrode (5), an electrode fixing seat (6) and an electrode terminal (8) connected in sequence;

The reactor shell assembly (2) includes a shell (9), a top cover (10), a water inlet pipeline (11), a water outlet pipeline (12), and a flushing connection port (13); wherein, the The top cover (10) is detachably covered on the housing (9), and the water outlet pipeline (12) and the electrode terminal (8) respectively pass through the top cover (10);

The flushing assembly (3) includes an automatic control valve (14) and a flushing water outlet (15) connected to each other;

The reaction electrode assembly (1) is arranged inside the reactor shell assembly (2); the controller (4) is connected to the flushing connection port (13) and the flushing assembly (3) respectively. The automatic control valve (14) is connected, and the controller (4) is connected with the electrode terminal (8) of the reactor shell assembly (2) simultaneously;

The controller (4) controls the electrolysis current, voltage, and electrode polarity conversion of the reaction electrode assembly (1); simultaneously controls the opening or closing of the solenoid valve of the automatic control valve (14), and utilizes water flow to the The reaction electrode assembly (1) is backwashed;

The lower part of the housing (9) communicates with the water inlet pipeline (11) and the flushing assembly (3);

The top cover (10) is insulated and sealed with the electrode terminal (8), and the water outlet pipeline (12) is sealed with the top cover (10).

Further, the controller (4) includes a constant current regulated DC power supply module (16), an electrode polarity conversion module (17), and a backwash control module (18); wherein, the constant current regulated DC power supply module (16) Power can be supplied to the electrode polarity conversion module (17) according to the water quality; the electrode polarity conversion module (17) can freely control the electrode polarity of the reaction electrode assembly (1) according to the preset time , and transmit the positive and negative conversion signals to the backwash control module (18) at the same time; the backwash control module (18) can control the water flow to the reaction The electrode assembly (1) is backwashed, and the time and frequency of backwashing can be set freely.

Further, the constant-current regulated DC power supply module (16) can provide any value between 0A～30A/-100V～+100V-DC range; the electrode polarity conversion time of the backwashing can be set freely, including Any value between 0 and 48h.

Further, the reaction electrode (5) is composed of one or more sets of electrode plates (19); each group of electrode plates (19) is used in pairs and alternately has a positive pole and a negative pole; the electrode plate (19) Between them are supported and fixed by electrode fixing blocks (7) and isolated and insulated.

Further, the reaction electrode (5) is composed of two sets of the electrode plates (19).

Further, the electrode plate (19) may have holes, and the holes may be circular, oval or polygonal.

Further, the shape of the electrode plate (19) can be plate-shaped, and can also be rod-shaped, cylindrical, mesh-shaped, honeycomb-shaped or other structures that can increase the reaction contact area; the plate-shaped electrode plate (19) It can also be a mesh, microwell or multiwell plate.

Further, the material of the electrode plate (19) is a titanium-based composite material, a noble metal material or a material with a coating layer of a titanium-based noble metal material.

Further, the noble metal material is platinum, ruthenium or iridium.

Further, the reaction electrode (5) is connected to the electrode holder (6) by welding or plugging; The card slot; the electrode plate (19) is insulated and electrically connected to the electrode column (8) through the card slot; the material of the electrode fixing block (7) and the card slot is an insulating material.

Further, the water outlet pipeline (12) is also connected with a section of water pipe or union; the material of the reactor shell (9) is transparent polysulfone, UPVC, plexiglass or metal material.

Further, the water flow direction of the water inlet pipeline (11) and the water outlet pipeline (12) can be exchanged with each other, and the reverse flow method is adopted to enter water from the water outlet pipeline (12) and from the water outlet pipeline (12). The water inlet pipeline (11) is discharged.

Basic purifying reaction mechanism of the present utility model is:

Cathodic reduction: 2H ₂ O+2e ^- → 2OH ^- +H ₂ ↑

M ⁿ⁺ +nOH ^- →M(OH) _n ↓ (precipitation of insoluble metal ions),

M ⁿ⁺ +ne ^- →M↓ (precipitation of heavy metal ions);

Anodizing: 2H ₂ O-4e ^- → 4H ⁺ +O ₂ ↑

2Cl ^- -2e ^- → Cl ₂

CL ₂ undergoes a disproportionation reaction:

Cl ₂ +H ₂ O→HClO+HCl

Wherein, M ⁿ⁺ represents metal ions (represented by heavy metal ions and metal ions such as calcium, magnesium, and iron).

Due to the electrolysis of water at the cathode, more OH ^- ions are produced near the electrode, and OH ^- can react with heavy metal ions to form M(OH) _n , which is insoluble in water, and precipitate out (a small amount of metal ions such as calcium, magnesium, iron, etc. Hydroxide can be produced and precipitated), and some inactive heavy metal ions will be reduced to simple substances by electrons; O ₂ and O , HO free radicals generated during the reaction have strong oxidizing properties and can degrade organic matter in water. HClO has a strong Sterilization ability, can be used for sterilization; part of _O2 dissolved in water increases the dissolved oxygen content of the produced water. Therefore, the electrolysis reaction can achieve the functions of degrading organic matter, sterilizing, removing heavy metal ions, and increasing dissolved oxygen in water.

After the electrode has reacted for a period of time, some deposits will adhere to the electrode plate. After the polarity of the electrode plate is changed, the deposits deposited and attached to the surface of the cathode will fall off quickly and be washed away by the flushing water flow at the same time.

The beneficial technical characteristics of the utility model are: using titanium-based composite material electrode, titanium-based noble metal material coating layer electrode or noble metal (such as platinum) electrode, which has the advantages of insoluble electrode material, no self-reaction, low oxygen and chlorine evolution potential and catalytic At the same time, an electric field environment is provided in the electrolytic reaction, and an oxidation, reduction environment, and acid-base environment are provided near the positive and negative electrodes, which is conducive to the electrochemical reaction, that is, the generation of oxygen and chlorine, the reduction and precipitation of heavy metals, and the oxidation of insoluble metals. Deposition of substances such as pollutants and hydroxides, oxidation-reduction degradation of toxic and harmful organic substances, and rearrangement of water molecular groups become smaller. The utility model has electrode switching and flushing functions at the same time, can be applied to the core component devices of various water purification equipment, has strong processing capacity, long service life, and controllable self-purification.

The technical effect of the utility model is: when the temperature is constant, the raw water within a specific index is introduced into the drinking water electrolysis reactor, the water flow enters the reactor shell through the water inlet, and the flow rate of the water flow, the current and voltage applied by the reaction electrode plate are controlled, The electrochemical redox reaction can be rapidly performed on the raw water in the reactor shell. Due to the high flow rate of the water flow in the shell, the polar plate as a spoiler, and the cancellation of the diaphragm design, it can be considered that the flow pattern of the water flow in it is turbulent, and the reaction solution is fully mixed and reacted, and the reaction is uniform.

The raw water after the electrolysis reaction can effectively remove organic pollutants, toxic and harmful ions or groups of metals such as nickel and arsenic, non-metals, and pathogenic bacteria such as Escherichia coli and Staphylococcus aureus.

The external regulated DC power supply can set the electrode polarity switching time within 0~48h. Through electrode switching, the electrolytic precipitates and sediments attached to the plate can be effectively removed to ensure electrode cleanliness and reactivity.

The utility model can be widely used in various drinking water purification fields.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a functional block diagram of the controller of the present invention.

Fig. 3 is a structural schematic diagram of the reaction electrode assembly of the present invention.

Fig. 4 is a schematic structural view of the reaction electrode plate of the present invention.

Among them, 1--electrode assembly, 2--reactor shell assembly, 3--flushing assembly, 4--controller, 5--reaction electrode, 6--electrode fixing seat, 7--electrode fixing block, 8 --electrode terminal, 9--shell, 10--top cover, 11--water inlet pipeline, 12--water outlet pipeline, 13--flushing connection port, 14--automatic control valve, 15- -Rinse water outlet, 16-constant current and voltage stabilized DC power supply module, 17-electrode polarity conversion module, 18-backwash control module, 19-electrode plate.

Detailed ways

Below in conjunction with accompanying drawing, the embodiment of the utility model is described in detail.

As shown in Figure 1, it is a structural representation of the utility model. The direction of the arrow in the figure is the water flow direction when the reactor is working, that is, the general water flow flows from top to bottom, and it can also flow from bottom to top. The material of the reactor shell 9 is made of transparent polysulfone, UPVC, plexiglass or metal material, heat-resistant and pressure-resistant, and the upper part is connected with the top cover 10 by threads and sealing rings. The reaction electrode 5 is fixed on the electrode holder 6 and is in the center of the reactor shell 9, and the water flow passes through the reactor shell 9 from bottom to top, and completely submerges the reaction electrode 5, making turbulent flow therein. The reaction electrode 5 is powered and controlled by the controller 4, an electrochemical redox reaction occurs in the reactor shell 9, and the polarity of the electrode is switched within a predetermined time, so that the precipitates generated by the electrolytic reaction dissolve and fall off the protective electrode, and Rinse the electrode to prolong its service life. The water outlet 12 leads the reacted water out of the utility model, and is connected with other rear equipments for further filtration and purification. The flushing connection port 13 can be connected with an automatic control valve 14 such as a solenoid valve. Under the control of the controller 4, it is opened when the polarity of the electrode is changed, and the eluted and shed harmful substances are flushed and discharged.

The raw water is preliminarily filtered through the prefabricated water purification device, and the raw water meeting the water quality requirements of the utility model is introduced into the utility model. The water inlet pipeline 11 is connected with the raw water inlet pipeline, and can be glued (PVC-U), hot-melt (PPR), welded (metal), union connection or flange connection according to the material type.

The electrode terminal 8 and the electrode fixing seat 6 are fixed on the top cover 10, the electrode terminal 8 is exposed to the outer insulating layer, the electrode terminal 8 is connected to the controller 4, the electrode fixing seat 6 is inside the top cover, and the reaction electrode assembly 1 can be fixed ; The electrode fixing block 7 ensures the electrode spacing.

As shown in Figure 2, it is a functional block diagram of the controller of the present utility model. The external current is input to the constant current regulated DC power supply module 16, and the constant current regulated DC power supply module 16 provides current to the reaction electrode 5 through the electrode polarity conversion module 17; the electrode polarity conversion module 17 controls the positive and negative current conversion; the electrode polarity When the polarity conversion module 17 converts the positive and negative poles of the current, it sends a positive and negative pole conversion signal to the backwash control module 18, and the backwash control module 18 controls the automatic control valve 14 to open for flushing, and the flushing time can be set; when the flushing is completed, the automatic control Valve 14 is closed.

As shown in Figures 3 to 4, they are respectively a structural schematic diagram of the reaction electrode assembly and a structural schematic diagram of the reaction electrode plate of the present invention. The reaction electrode 5 is made of a titanium-based composite material, a titanium-based noble metal material coating layer electrode or a noble metal (such as platinum) material. The positive and negative electrode materials have the same specifications, and are installed in pairs through the slots of the electrode plate 19 and connected to the electrode column 8. Multiple pairs can be installed according to the water treatment capacity. The shape of the electrode plate 19 can be rod, sheet, cylindrical, mesh, honeycomb or other shapes. In order to increase the reaction contact area, holes can be opened on the electrode plate 19, and the holes can be rectangular, circular, hexagonal or other. shape, the electrode plate 19 can also be a mesh plate, a microporous plate, a porous plate or other materials with a larger surface area. The reaction electrode 5 may consist of one set (one anode, one cathode) of electrode plates 19 , or two, three or more sets of electrode plates 19 .

This example is only an embodiment of the utility model. If it is necessary to further improve the flow pattern in the reactor shell to make the reaction more uniform, the countercurrent water inlet and outlet method can also be adopted, that is, water is fed from the lower water inlet and the upper water outlet The water outlet can be changed according to the needs of engineering design.

Compared with the prior art, the drinking water electrolysis reactor described in this embodiment has the functions of purifying the raw water within a specific index, degrading organic matter, reducing heavy metals, and sterilizing and disinfecting, and has the functions of large processing capacity, simple equipment structure, It has the characteristics of good flow pattern without diaphragm, and the electrode can be protected and self-purified through an external controllable voltage-stabilized DC power supply.

Claims (12)

1. Drinking water electrolysis reactor with self-purification function, including reaction electrode subassembly (1), reactor housing assembly (2), its characterized in that:

the washing device also comprises a washing component (3) and a controller (4); wherein,

the reaction electrode assembly (1) comprises a reaction electrode (5), an electrode fixing seat (6) and an electrode binding post (8) which are connected in sequence;

the reactor shell assembly (2) comprises a shell (9), a top cover (10), a water inlet pipeline (11), a water outlet pipeline (12) and a flushing connecting port (13); the top cover (10) is detachably covered on the shell (9), and the water outlet pipeline (12) and the electrode binding post (8) respectively penetrate through the top cover (10);

the flushing assembly (3) comprises an automatic control valve (14) and a flushing water outlet (15) which are connected with each other;

the reaction electrode assembly (1) is arranged inside the reactor shell assembly (2); the controller (4) is respectively connected with the flushing connecting port (13) of the flushing assembly (3) and the automatic control valve (14), and meanwhile, the controller (4) is connected with the electrode binding post (8) of the reactor shell assembly (2);

the controller (4) controls the electrolysis current, voltage and electrode polarity conversion of the reaction electrode assembly (1); meanwhile, the opening or closing of an electromagnetic valve of the automatic control valve (14) is controlled, and the reaction electrode assembly (1) is backwashed by water flow;

the lower part of the shell (9) is communicated with the water inlet pipeline (11) and the flushing assembly (3);

the top cover (10) and the electrode binding post (8) are sealed in an insulating mode, and the water outlet pipeline (12) and the top cover (10) are sealed.

2. The drinking water electrolysis reactor with self-purification function according to claim 1, characterized in that: the controller (4) comprises a constant-current voltage-stabilizing direct-current power supply module (16), an electrode polarity conversion module (17) and a backwashing control module (18); the constant-current voltage-stabilizing direct-current power supply module (16) can supply power to the electrode polarity conversion module (17) according to the water quality condition; the electrode polarity conversion module (17) can freely control the electrode polarity of the reaction electrode assembly (1) according to preset time and simultaneously transmit a positive and negative conversion signal to the back washing control module (18); the back-washing control module (18) can control water flow to back wash the reaction electrode assembly (1) when the polarity of the electrodes of the reaction electrode assembly (1) is switched, and the time and frequency of the back washing can be freely set.

3. The drinking water electrolysis reactor with self-purification function according to claim 2, characterized in that: the constant-current voltage-stabilizing direct-current power supply module (16) can provide any value in the range of 0A-30A/-100V- + 100V-DC; the electrode polarity conversion time of the back washing is freely set and comprises any value within the range of 0-48 h.

4. The drinking water electrolysis reactor with self-purification function according to claim 1, characterized in that: the reaction electrode (5) is composed of one or more groups of electrode plates (19); each group of the electrode plates (19) are used in pairs in a staggered manner and are provided with a positive electrode and a negative electrode; the electrode plates (19) are supported, fixed, isolated and insulated by the electrode fixing blocks (7).

5. The drinking water electrolysis reactor with self-purification function according to claim 4, characterized in that: the reaction electrode (5) is composed of 2 groups of electrode plates (19).

6. The drinking water electrolysis reactor with self-purification function according to claim 4 or 5, characterized in that: the electrode plate (19) can be provided with holes which can be round, oval or polygonal.

7. The drinking water electrolysis reactor with self-purification function according to claim 6, characterized in that: the shape of the electrode plate (19) can be plate-shaped, and also can be a rod-shaped structure, a cylindrical structure, a net-shaped structure, a honeycomb-shaped structure or other structures which can increase the reaction contact area; the plate shape of the electrode plate (19) can also be a screen plate, a micro-porous plate or a multi-porous plate.

8. The drinking-water electrolysis reactor with self-purification function according to claim 4, 5 or 7, characterized in that: the electrode plate (19) is made of a titanium-based composite material, a noble metal material or a material with a titanium-based noble metal material coating layer.

9. The drinking water electrolysis reactor with self-purification function according to claim 8, characterized in that: the noble metal material is platinum, ruthenium or iridium.

10. The drinking-water electrolysis reactor with self-purification function according to claim 4, 5, 7 or 9, characterized in that: the reaction electrode (5) is connected with the electrode fixing seat (6) in a welding or inserting manner; the electrode fixing seat (6) is provided with a clamping groove which is correspondingly connected with the electrode plate (19); the electrode plate (19) is mutually insulated and electrically connected with the electrode binding post (8) through the clamping groove; the electrode fixing block (7) and the clamping groove are made of insulating materials.

11. The drinking water electrolysis reactor with self-purification function according to claim 10, characterized in that: the water outlet pipeline (12) is also connected with a section of water pipe or a movable joint; the reactor shell (9) is made of transparent polysulfone, UPVC, organic glass or metal materials.

12. The drinking-water electrolysis reactor with self-purification function according to claim 1, 2, 3, 4, 5, 7, 9 or 11, characterized in that: the water flow directions of the water inlet pipeline (11) and the water outlet pipeline (12) can be mutually exchanged, and water enters from the water outlet pipeline (12) and exits from the water inlet pipeline (11) in a counter-current water mode.