CN209584384U - A kind of novel tube-plate type sodium hypochlorite electrolytic cell - Google Patents

Abstract

The present disclosure discloses a kind of novel tube-plate type sodium hypochlorite electrolytic cells, including shell and electrode group, the shell includes flange A, flange B, tube faucet and tubular shell, the both ends of the tubular shell are fixedly connected sequentially tube faucet and flange B, the flange B at both ends is tightly connected flange A respectively, and the electrode group is set to tubular shell center；By sealing end flanges A and flange B that PVC material is arranged, by the way that the flange with the through-hole cooperation on flange B is arranged on flange A, realizes the sealing of electrolytic cell end face, there is good corrosion-and high-temp-resistant energy, the risk for greatly reducing groove body leakage improves the security performance of electrolytic cell operation.And the structure of the electrode group of the disclosure can guarantee the reliable insulation of cathode plate face and anode plate face, electrolysis performance with higher.

Description

A New Type of Tube Sheet Sodium Hypochlorite Electrolyzer

technical field

The present disclosure relates to the related technical field of salt water electrolytic cells, and relates to a novel tube-sheet type sodium hypochlorite electrolytic cell, which is mainly used in water treatment and disinfection.

Background technique

The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

The molecular formula of sodium hypochlorite is NaClO, which is a broad-spectrum high-efficiency disinfectant, which is widely used in drinking water disinfection, sewage treatment, livestock and poultry farm disinfection and other places. At present, the main sources of sodium hypochlorite are finished sodium hypochlorite and on-site preparation of sodium hypochlorite. The concentration of finished sodium hypochlorite is about 10%, which is a hazardous chemical, which is cumbersome and inconvenient to transport, and decomposes quickly and is not easy to store for a long time. Moreover, because it is a by-product of chlor-alkali, the solution composition is complex, so sodium hypochlorite is more The on-site preparation of electrolyzed low-concentration salt water can achieve accurate dosage (volume), safe operation, convenient use, and can be added under any environmental working conditions. The safety hazard of leakage is far lower than other chemical disinfectants.

Sodium hypochlorite electrolytic cells are divided into tubular electrolytic cells and tube sheet electrolytic cells. The tubular electrolyzer is composed of a cathode outer tube and an anode inner tube. Due to the uneven distribution of current density and small output, it is rarely used in the market. At present, the tube-sheet type electrolyzer is the mainstream. The tube-sheet type means that the electrode group in the electrolyzer is a plate-type electrode, and the electrolyzer shell is a tubular structure. The main function of the shell of the electrolytic cell is to provide a place for the electrolysis reaction. Since hydrogen and sodium hypochlorite will be generated during the reaction, the sealing method of the electrolytic cell is particularly important. At present, most of the tube-sheet type electrolyzers on the market are sealed by bolts fastened with silicone pads or rubber pads at both ends. Due to thermal expansion and contraction, the silicone pads or rubber pads are easily deformed, coupled with the corrosion of sodium hypochlorite brine and other solutions. It is easy to cause the leakage of hydrogen or sodium hypochlorite in the electrolyzer, which is dangerous.

Therefore, how to design an electrolytic cell so that it has better sealing performance, can achieve long-term sealing, reduce the risk of leakage of the electrolytic cell, and has high electrolytic performance, which is an urgent problem for those skilled in the art to solve .

Utility model content

In order to solve the above-mentioned problems, the present disclosure proposes a new type of tube-sheet type sodium hypochlorite electrolytic cell. By setting the sealing end flange A and flange B of PVC material, the flange A is provided with a through hole on the flange B. The flange realizes the sealing of the end face of the electrolytic cell, and has good high temperature resistance and corrosion resistance, which greatly reduces the risk of leakage of the cell body and improves the safety performance of the electrolytic cell. In addition, the structure of the electrode group of the present disclosure can ensure reliable insulation of the cathode plate surface and the anode plate surface, and has high electrolysis performance.

In order to achieve the above object, the present disclosure adopts the following technical solutions:

One or more embodiments provide a novel tube-sheet type sodium hypochlorite electrolytic cell, including an outer shell and an electrode group, the outer shell including a flange A, a flange B, a pipe socket and a tubular shell, the tubular shell has Both ends of the connection pipe socket and flange B are fixed in sequence, the flanges B at both ends are sealed and connected to the flange A respectively, and the electrode group is arranged in the center of the tubular casing;

The flange A includes a flange plate, a flange provided on the flange plate and a terminal mounting hole in the center of the flange plate, and the flange B is a flange plate with a through hole in the middle. The inner diameter of the through hole matches the outer diameter of the flange of flange A, and the flange of flange A is connected to the through hole of flange B through a sealing ring; the electrode group includes a positive terminal and a negative terminal, and the tubular The terminal installation holes of the flange A at both ends of the housing are respectively connected to the positive terminal and the negative terminal of the electrode group through sealing rings, and the positive terminal and the negative terminal of the electrode group are respectively connected to the positive and negative terminals of the electrolytic power supply.

Further, the electrode group also includes a cathode plate, a bipolar plate, an anode plate, a separator, an insulating connecting rod, a cathode titanium end flange C and an anode titanium end flange C, and the cathode plate and the negative terminal are respectively fixed on the On the two end faces of the cathode titanium end flange C, the anode plate and the positive terminal are respectively fixed and arranged on the two end faces of the anode titanium end flange C, and the bipolar plate is respectively connected with the anode plate and the cathode plate through the separator and insulation. Connecting rods, the bipolar plates are connected by separators and insulating connecting rods, the bipolar plates are staggered and interspersed in the middle to form intermediate transition electrodes, and the cathode part of the electrode group is arranged opposite to the anode part.

Further, an insulating gasket is arranged between the two pole plates on the insulating connecting rod.

Further, the flange A and the flange B are made of PVC.

Further, the material of the pipe socket is PVC material, and the tubular casing is a transparent plexiglass pipe.

Further, the pipe socket and the transparent plexiglass pipe are connected by means of adhesive.

Further, the glue is PVC glue or chloroform.

Further, the pipe socket is made of the same material as the flange B, and is connected by welding or casting.

Further, the sealing ring between the flange A and the flange B and the sealing ring between the flange A and the electrode assembly terminal are O-rings.

Further, the O-ring is made of fluorine rubber.

Compared with the prior art, the beneficial effects of the present disclosure are:

(1) The novel tube sheet type sodium hypochlorite electrolytic cell provided by the utility model, by setting the sealing end flange A and flange B of PVC material, by setting the flange matching the through hole on the flange B on the flange A, It realizes the sealing of both ends of the tube-sheet type electrolytic cell, has good high temperature and corrosion resistance, greatly reduces the risk of cell leakage, and is easy to assemble, improving the safety performance of the electrolytic cell.

(2) The fluorine rubber O-ring adopted in the present disclosure not only has good sealing effect and good high temperature and corrosion resistance, but also has a simple structure and is easy to install, which greatly simplifies the installation of the electrolytic cell.

(3) In the present disclosure, the transparent material is used as the material of the shell, so that the reaction situation inside the electrolytic cell can be observed, and the timing of pickling can be judged in time.

(4) The electrode group structure provided in the present disclosure can reliably separate the oppositely arranged anode plate surface and cathode plate surface at equal intervals, which can improve the efficiency of electrolysis.

Description of drawings

The accompanying drawings that constitute a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute a limitation to the present application.

1 is a schematic structural diagram of an electrolytic cell according to an embodiment of the present disclosure;

2 is a schematic structural diagram of a flange A according to an embodiment of the present disclosure;

3 is a schematic structural diagram of a flange B according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an electrode group according to an embodiment of the present disclosure;

5 is a schematic diagram of a detailed structure of an electrode group according to an embodiment of the present disclosure;

Among them: 1. Flange A, 1-1, flange, 1-2, terminal mounting hole, 1-3, hole of flange A, 2. flange B, 2-1, through hole, 2-2 , Eyelet of flange B, 3, Pipe socket, 4, Tubular shell, 5, Electrode group, 5-1, Terminal post, 5-2, Flange C, 5-3, Cathode plate, 5-4, Bipolar Plates, 5-41, First Set of Bipolar Plates, 5-42, Second Set of Bipolar Plates, 5-4-1, Anode Section of Bipolar Plates, 5-4-2, Cathode of Bipolar Plates Part, 5-5, Anode Plate, 5-6, Separator, 5-6-1 Fixed Teeth, 5-6-2 Hydrogen Channel, 5-7, Insulation Connecting Rod, 6, Liquid Inlet, 7, Outlet liquid port.

Detailed ways:

The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

In the technical solutions disclosed in one or more embodiments, as shown in FIG. 1 , a novel tube-sheet type sodium hypochlorite electrolytic cell includes an outer casing and an electrode group 5, and the outer casing includes a flange A1, a flange B2, a pipe bearing The mouth 3 and the tubular casing 4, the two ends of the tubular casing 4 are fixedly connected to the pipe socket 3 and the flange B2 in turn, and the flanges B2 at both ends are respectively sealed and connected to the flange A1, and the electrode group 5 is arranged in the tubular casing. Shell 4 is in the center.

As shown in Figures 2 and 3, the flange A includes a flange 1-4, a flange 1-1 provided on the flange 1-4, a hole 1-3 of the flange A, and a hole in the center of the flange Terminal mounting holes 1-2, the flange B is a flange plate with a through hole 2-1 in the middle, and the inner diameter of the through hole 2-1 of the flange B is the same as the outer diameter of the flange 1-1 of the flange A. Matching, the flange 1-1 of the flange A and the through hole 2-1 of the flange B are sealed and connected by a sealing ring; the sealing ring between the flange A and the flange B can be an O-ring, The O-ring may be made of fluorine rubber. The flange 1-1 of flange A is set with an O-ring, and then the hole 1-3 of flange A and the hole 2-2 of flange B are fixed by fastening bolts.

As shown in FIG. 4 , the electrode group includes a positive terminal and a negative terminal, and the terminal installation holes of the flange A at both ends are respectively connected to the positive terminal and the negative terminal of the electrode group through sealing rings. The positive and negative terminals shown are the terminals 5-1 arranged at both ends of the electrode group. After the flange A is sealed with the positive terminal and the negative terminal, the electrolysis group is arranged in the center of the tubular casing 4, and the electrode group is The positive terminal and the negative terminal are respectively connected to the positive and negative poles of the electrolytic power supply. The casing and the electrode assembly terminal are sealed to form a complete electrolytic cell structure through the sealing between the sealing end flange A and the electrode assembly terminal. The sealing ring between the flange A and the electrode assembly terminal can be an O-ring, and the O-ring can be made of fluorine rubber. The fluorine rubber O-ring not only has a good sealing effect, but also has good high temperature and corrosion resistance, and has a simple structure and is easy to install, which greatly simplifies the installation of the electrolytic cell.

As shown in Figures 4 and 5, the electrode group further comprises a cathode plate 5-3, a bipolar plate 5-4, an anode plate 5-5, a separator 5-6, an insulating connecting rod 5-7, a cathode titanium end method The flange C and the anode titanium end flange C, the cathode plate 5-3 and the negative terminal are respectively fixed on the two end faces of the cathode titanium end flange C, and the anode plate 5-5 and the positive terminal are respectively fixed on the anode titanium terminal. On the two end faces of the flange C, the bipolar plates are respectively connected with the anode plate 5-5 and the cathode plate 5-3 through the separator 5-6 and the insulating connecting rod 5-7, and the bipolar plates are connected by The separators 5-6 are connected to the insulating connecting rods 5-7, the bipolar plates are staggered and inserted in the middle to form intermediate transition electrodes, and the cathode part of the electrode group is arranged opposite to the anode part. The material of the insulating connecting rods 5-7 can be polytetrafluoroethylene.

The bipolar plate is also known as a composite electrode, that is, half of the electrode plate is the cathode and the other half is the anode. As shown in Figure 5, the bipolar plate can be made of pure titanium, and the plate surface on the side of the anode part of the bipolar plate is coated A layer of noble metal oxide, the noble metal can be a mixture of ruthenium and iridium, as a distinction between the anode part and the anode plate of the bipolar plate in FIG. The cathode part 5-4-2, the anode part of the electrode group includes the anode plate 5-5 and the anode part 5-4-1 of the bipolar plate, the cathode part of the electrode group is arranged opposite to the anode part plate surface means: all The anode plate is arranged opposite to the cathode part of the adjacent bipolar plate, the cathode plate is arranged opposite to the anode part of the adjacent bipolar plate, and the anode part of the bipolar plate is opposite to the adjacent bipolar plate. The plates of the cathode part of the plate are arranged opposite to each other.

Teeth 5-6-1 and hydrogen gas channels 5-6-2 are arranged on the separator 5-6. Teeth 5-6-1 are used to fix the electrode plates, and anode plates are arranged at intervals on the teeth 5-6-1. surface and cathode plate surface. The hydrogen channel 5-6-2 is convenient for the gas to be discharged from the electrolyzer in time.

The cathode titanium end flange C and the anode titanium end flange C can be of the same structure, both of which are flange C5-2. The main function of flange C5-2 is to fix the cathode and anode plates and the terminals, which are connected to the power supply and are the electrolytic cell. Provide the DC current required for the reaction. In terms of mechanical connection, the cathode plate 5-3 and the negative terminal can be welded on the two end faces of the cathode titanium end flange C respectively, and the anode plate and the positive terminal can be welded on the two end faces of the anode titanium end flange C respectively. , the bipolar plates are staggered and interspersed between the cathode and anode to form an intermediate transition electrode.

Figure 5 is a schematic structural diagram of a connection method of electrode plate connection. Only one separator and insulating connecting rod are shown. The specific connection method is that one end of the cathode plate 5-3 is fixed on the flange C5-2. The anode part of the first group of bipolar plates 5-41 is inserted between the plate surfaces of the two cathode plates 5-3, and the boundary between the cathode and anode of the first group of bipolar plates and the other end of the cathode plate 5-3 are alternately clamped. Connected to the teeth 5-6-1 of the first partition plate 5-6, insulating connecting rods 5-7 are arranged on the left and right sides of the partition plate 5-6, and through holes are arranged on the surfaces of each cathode and anode plate, Pass the insulating connecting rod 5-7 through, and set insulating spacers 5-8 between each pole plate. The thickness of the insulating spacers 5-8 is equal to the distance between the teeth 5-6-1. The sheet 5-8 and the teeth 5-6-1 make a certain gap between the cathode and anode plates, so that the anode plate surface and the cathode plate surface can be reliably insulated. The second separator can be arranged at the boundary between the cathode and anode of the second group of bipolar plates 5-42, and the cathode and anode boundary of the second group of bipolar plates 5-42 and the right end of the first group of bipolar plates are alternately clamped on On the teeth 5-6-1 of the second separator, an electrolysis unit is formed between two adjacent separators. The cathode plate 5-3 is connected with the anode part of the bipolar plate through an insulating connecting rod 5-7, the anode plate 5-4 is connected with the cathode part of the bipolar plate through an insulating connecting rod 5-7, and the electrode plates are arranged vertically. , and finally the whole electrode group is fixed through the separators 5-6. The bipolar plate is not connected to the power supply. After the power supply is turned on, an electric field is formed in the electrolytic cell. Under the action of the electric field, the positive and negative ions in the electrolyte between the electrolytic cell gaps move in a direction, and electrochemical reactions occur on the cathode and anode respectively. So that the entire circuit is turned on.

As a further improvement, the material of flange A and flange B can be PVC material. The material of the pipe socket may be PVC material. In order to improve the sealing performance of the electrolytic cell, the pipe socket and the flange B can be fixedly connected, and the pipe socket and the flange B are both made of PVC material, and can be connected by welding or casting. The tubular casing is made of a transparent material, which can be a transparent plexiglass tube, and the wall thickness can be 6-10 mm. Within this thickness range, the strength requirements of the entire device can be met. The transparent material can observe the internal reaction of the electrolytic cell and judge the timing of pickling in time. The pipe socket of PVC material and the transparent plexiglass pipe can be connected by adhesive, and the adhesive can be PVC glue or chloroform . The main function of the pipe socket is to connect the sealing end flange B and the organic transparent glass pipe to enhance the overall strength of the electrolytic cell.

The liquid feeding method of the electrolytic cell is bottom in and top out, that is, the electrolyte enters the electrolytic cell from the liquid inlet 6, and the produced sodium hypochlorite solution and hydrogen enter the sodium hypochlorite solution storage tank from the liquid outlet 7.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Although the specific embodiments of the present disclosure are described above in conjunction with the accompanying drawings, they do not limit the protection scope of the present disclosure. Those skilled in the art should understand that on the basis of the technical solutions of the present disclosure, those skilled in the art do not need to pay creative efforts. Various modifications or variations that can be made are still within the protection scope of the present disclosure.

Claims (10)

1. a kind of novel tube-plate type sodium hypochlorite electrolytic cell, it is characterized in that: including shell and electrode group, the shell includes flange A, flange B, tube faucet and tubular shell, the both ends of the tubular shell are fixedly connected sequentially tube faucet and flange B, the method at both ends Blue B is tightly connected flange A respectively, and the electrode group is set to tubular shell center；

The flange A include ring flange, on ring flange the flange being arranged and ring flange center binding post mounting hole, the flange B is the ring flange that there is through-hole in centre, and the through-hole internal diameter and flange A flange outside diameter of the flange B matches, the flange A flange It is tightly connected with the through-hole of flange B by sealing ring；The electrode group includes positive terminal and negative terminal, the tubular shell The binding post mounting hole of the flange A at both ends is tightly connected the positive terminal and negative terminal of electrode group, institute by sealing ring respectively The positive terminal and negative terminal of stating electrode group are separately connected the positive and negative anodes of electrolysis power.

2. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as described in claim 1, it is characterized in that: the electrode group further includes Cathode plate, bipolar plates, anode plate, partition, insulated connecting rod, cathode titanium end flanges C and anode titanium end flanges C, cathode plate and negative Binding post is respectively fixedly disposed on two end faces of cathode titanium end flanges C, and anode plate and positive terminal are respectively fixedly disposed at On two end faces of anode titanium end flanges C, the bipolar plates pass through partition and insulated connecting rod with anode plate and cathode plate respectively It connects, is connected by partition with insulated connecting rod between the bipolar plates, the bipolar plates are staggered to be interspersed in intermediate formed Between transition electrode, cathode portion plate face and the anode part plate face of electrode group be oppositely arranged.

3. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as claimed in claim 2, it is characterized in that: in the insulated connecting rod Insulation spacer is set between upper two pole plates.

4. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as described in claim 1, it is characterized in that: the flange A and flange B Material is PVC material.

5. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as described in claim 1, it is characterized in that: the tube faucet material is PVC material, the tubular shell are transparent organic glass pipe.

6. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as claimed in claim 5, it is characterized in that: tube faucet with it is transparent organic Glass tube is attached by the way of viscose glue.

7. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as claimed in claim 6, it is characterized in that: the viscose glue is PVC glue It or is chloroform.

8. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as described in claim 1, it is characterized in that: the tube faucet and method Blue B material is identical, is connected by the way of welding or casting one.

9. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as described in claim 1, it is characterized in that: the flange A and method The sealing ring between sealing ring and flange A and electrode group binding post between blue B is O-ring.

10. a kind of novel tube-plate type sodium hypochlorite electrolytic cell as claimed in claim 9, it is characterized in that: the O-ring is fluorine glue Material.