CN110484928B

CN110484928B - Vertical sodium hypochlorite electrolytic cell

Info

Publication number: CN110484928B
Application number: CN201910835212.4A
Authority: CN
Inventors: 杨民生
Original assignee: Sunrui Marine Environment Engineering Co ltd
Current assignee: Sunrui Marine Environment Engineering Co ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-11-20
Anticipated expiration: 2039-09-05
Also published as: CN110484928A

Abstract

The utility model provides a vertical sodium hypochlorite electrolysis trough, includes casing, plate electrode, insulating pad, conducting rod, sets up first compartment in the casing bottom, and the casing top is equipped with the second compartment, and a plurality of plate electrodes pile up in proper order and are listed as between first compartment and second compartment, and the plate electrode periphery supports and leans on shells inner wall, separates by insulating pad between the plate electrode, and adjacent two plate electrodes and insulating pad in the middle of it enclose into the cavity of holding electrolyte, and adjacent two plate electrodes and electrolyte between them constitute an electrolysis unit, be equipped with the limbers on the plate electrode, connect the cavity of two adjacent electrolysis units. Electrolyte flows from bottom to top, and the perpendicular to plate electrode passes through in the hole on the plate electrode, and the hydrogen that the in-process produced is from upwards moving down, through shortening the water flow path, shortens electrolyte and passes through the polar plate time, reduces the electrolyte temperature rise, has improved current efficiency, and gas is discharged by the top, accords with natural law, makes hydrogen and electrolyte change the separation, avoids gaseous influence electrolysis efficiency.

Description

Vertical sodium hypochlorite electrolytic cell

The technical field is as follows:

the invention belongs to the technical field of electrolytic cell design, and particularly relates to a vertical sodium hypochlorite electrolytic cell.

Background art:

the hypochlorous acid and hypochlorite are commonly called as effective chlorine, has strong oxidizing property, can effectively kill and prevent organisms from growing and breeding in the system, and plays a role in preventing biofouling. At present, sodium hypochlorite generated by electrolyzing saline solution is used for preventing biological growth and propagation in a water treatment system, and the method is generally accepted and applied, and has wide application value in the aspects of water treatment such as cooling water of thermal power plants and petrochemical plants, ship and swimming pool sterilization, drinking water disinfection, oil field reinjection water treatment, hospital sewage treatment, food industry disinfection and sterilization, wastewater treatment, bleaching and dyeing color treatment and the like. The electrolytic bath for the existing sodium hypochlorite generating device is divided into a tubular electrolytic bath and a plate electrolytic bath. The plate type electrolytic cell can improve the yield of a single cell by changing the real number or the area of the polar plate, but the electrolytic cell with the original structure has the defects of difficult sealing, easy leakage of electrolyte, incapability of quickly separating generated gas, reduced current efficiency and the like. Therefore, the currently widely used sodium hypochlorite generator is a tubular electrolytic cell (for example, patent CN 102762773B). However, the electrode plates in the tubular electrolytic cell are horizontally arranged and vertically arranged, the electrolytic brine flows through the gaps of the electrode plates along the horizontal direction, and the generated hydrogen is discharged to the upper part of the tubular electrolytic cell. The disadvantages of the method are large volume, difficult discharge of hydrogen, complex structure, complex installation and disassembly and high temperature of electrolyte. Patent CN2359298Y discloses a vertical electrolytic cell, but the installation of the electrode plate of the electrolytic cell is complicated, and the anode plate (or cathode plate) is inserted into the U-shaped cathode plate (or anode plate), and the electrode plate is net-shaped, which reduces the effective area of electrolysis.

The invention content is as follows:

the invention aims to overcome the defects in the prior art, and seeks to design a vertical sodium hypochlorite electrolytic cell, which solves the problem that the electrode plate of the conventional vertical electrolytic cell is difficult to mount and dismount.

The technical scheme of the invention is as follows: a vertical sodium hypochlorite electrolytic cell comprises a shell, electrode plates, insulating gaskets and conducting rods, wherein a water inlet, an air outlet and a water outlet are formed in the shell, anode plates and cathode plates of the electrode plates are alternately arranged and are respectively connected with one conducting rod to be led out of the shell; two adjacent electrode plates and an insulating gasket between the two adjacent electrode plates enclose a chamber for containing electrolyte, and the chamber and the electrolyte flowing through the chamber form an electrolysis unit; and the electrode plates are provided with water through holes, and the chambers of two adjacent electrolysis units are connected in the vertical direction, so that the electrolyte flows upwards perpendicular to the electrode plates.

The limbers are discontinuously arranged around the center of the electrode plate in a ring shape, and the limbers between two adjacent rings are arranged in a staggered way.

The water inlet is arranged at the bottom of the first compartment, and the air outlet and the water outlet are both fixedly arranged on the second compartment.

The conducting rod comprises a lower conducting rod and an upper conducting rod, the lower conducting rod extends out of the shell after being connected with the electrode plate at the lowest part, and the upper conducting rod extends out of one side of the shell after being connected with the electrode plate at the uppermost part.

5. The vertical sodium hypochlorite electrolytic cell according to claim 4, wherein the exhaust port is provided at the top of the housing and above the water outlet, and the upper conductive rod is disposed below the water outlet.

The shell consists of a tubular body, an upper cover plate and a lower cover plate which are hermetically connected at two ends of the tubular body; the middle part of the electrode plate is provided with a central hole; the insulating gasket comprises a plane annular gasket and an annular gasket with a T-shaped section, the section of the annular gasket with the T-shaped section is of a transverse T-shaped structure, the thickness of the transverse part of the annular gasket is the same as that of the plane annular gasket, the annular gasket is arranged between the peripheries of two adjacent electrode plates, the transverse part of the annular gasket with the T-shaped section is arranged between the peripheries of central holes of the adjacent electrode plates, and the longitudinal two ends of the annular gasket with the T-shaped section are respectively inserted into the inner peripheries of the central holes of the electrode plates; the planar annular gasket is replaced by an annular rim that wraps around the perimeter of the electrode plate.

A support frame is provided below the lowermost electrode plate.

The insulating gasket is made of fluororubber; the shell is made of transparent materials.

Compared with the existing electrolytic cell, the invention has the following beneficial effects: (1) the treatment capacity of the device is adjusted by adjusting the number of the electrode plates, so that the structure is simple and the disassembly is convenient; (2) electrolyte flows from bottom to top, and the perpendicular to plate electrode passes through in the hole on the plate electrode, and the hydrogen that the in-process produced is from upwards moving down, through shortening the water flow path, shortens electrolyte and passes through the polar plate time, reduces the electrolyte temperature rise, has improved current efficiency, and gas is discharged by the top, accords with natural law, makes hydrogen and electrolyte change the separation, avoids gaseous influence electrolysis efficiency.

Description of the drawings:

fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

FIG. 3 is a schematic view of the electrode plate of the present invention in a circular configuration.

Fig. 4 is a schematic structural view of the support frame of the present invention.

The specific implementation mode is as follows:

the invention is further illustrated by the following specific examples in combination with the accompanying drawings.

Example 1

As shown in figures 1 and 2, the invention relates to a vertical sodium hypochlorite electrolytic cell, which comprises a shell, electrode plates, an insulating gasket, an upper conducting rod 3 and a lower conducting rod 7, wherein the shell is a tubular sealed shell formed by a transparent tubular body 9 (both ends of which are provided with flanges 8) and a flange upper cover plate 17 and a flange lower cover plate 18, the bottom end of the shell is provided with a first compartment 5, the top end of the shell is provided with a second compartment 2, a plurality of electrode plates are sequentially stacked between the first compartment 5 and the second compartment 2, the peripheries of the electrode plates are abutted against the inner wall of the tubular body 9, adjacent electrode plates are separated by the insulating gasket, the insulating gasket between the peripheries of the adjacent electrode plates encloses a chamber 15 for containing electrolyte, the adjacent electrode plates and the electrolyte between the adjacent electrode plates form an electrolytic unit, the electrode plates are provided with water through holes 14, the chambers of the adjacent two electrolytic units are directly connected in the vertical direction, the electrolyte flows upwards perpendicular to the electrode plates, a water inlet 6 is arranged on a lower cover plate 18 at the bottom of a first compartment 5, the first compartment 5 ensures that the entering electrolyte can uniformly rise, an exhaust port 1 and a water outlet 10 are arranged on a second compartment 2, specifically, the exhaust port 1 is arranged on an upper cover plate 17 at the top of a shell, the water outlet 10 is arranged at the upper part of a transparent tubular body 9, a lower conducting rod 7 is connected with the electrode plate (including an anode plate 11 or a cathode plate 11 ') at the lowest part and then extends out of the shell from the lower cover plate 18 and is then connected with the anode or the cathode of a direct current power supply, a conducting rod 3 at the upper part is connected with the electrode plate (the anode plate 11 or the cathode plate 11') at the highest part and then extends out of one side of the tubular body 9 and is then connected with the cathode or the anode of the direct current, thereby ensuring the generation of H₂No explosion occurs in contact with the upper conductive rod 3.

The electrode plate is square, round (with a central hole 111 in the middle), or other structures that can implement its application. The upper and lower electrode plates can be an anode plate 11 and a cathode plate 11 '(or arranged in an interchangeable way), wherein the anode plate 11 is a titanium-coated noble metal coating, and the cathode plate 11' is made of titanium; or the upper and lower electrode plates are bipolar plates, wherein the anode surfaces of two adjacent bipolar plates correspond to the cathode surfaces.

As an implementation manner of this embodiment, the insulating gasket includes a planar annular gasket 4 and an annular gasket 13 with a T-shaped cross section, the cross section of the annular gasket 13 with the T-shaped cross section is a transverse T-shaped structure, the transverse portion of the annular gasket 13 with the T-shaped cross section has the same thickness as that of the planar annular gasket 4, the planar annular gasket 4 is disposed between the peripheries of two adjacent electrode plates, the transverse portion of the annular gasket 13 with the T-shaped cross section is disposed between the peripheries of the central holes of the adjacent electrode plates, and the two longitudinal ends of the annular gasket 13 with the T-shaped cross section are respectively inserted into the inner peripheries of the central holes.

As another implementation manner of this embodiment, the insulating spacers are annular spacers (corresponding to the frames of the electrode plates) surrounding the peripheries of the electrode plates and annular spacers with T-shaped cross sections, which can ensure the distance between adjacent electrode plates and prevent the adjacent electrode plates from contacting and short-circuiting due to deformation.

The water through holes 14 are discontinuously arranged in a ring shape around the centers of the electrode plates (as shown in fig. 3), the water through holes 14 between two adjacent rings are arranged in a staggered manner, and the water through holes 14 between two adjacent electrode plates are also arranged in a staggered manner, so that the turbulence degree of the electrolyte is increased, and the electrolysis efficiency is improved.

In order to ensure the stability of the apparatus, a "rice" -shaped fixed support frame 12 (shown in fig. 4) is provided under the lowermost electrode plate for supporting the electrode plate.

The working process of the invention is as follows: sodium chloride enters the first compartment 5 from the water inlet 6, vertically enters the electrolysis chamber from the electrode plate limber hole 14 after being filled with the first compartment 5, and after electrolyte flows over the upper conductive rod 3 and can flow out of the water outlet 10, the upper conductive rod and the lower conductive rod are respectively connected with a direct current power supply and are electrified to electrolyze the electrolyte, gas generated in the process is discharged from the gas outlet 1, and generated sodium hypochlorite is discharged from the water outlet 10.

Compared with a tubular electrolytic cell, the vertical electrolytic cell has the characteristics of reduced volume, reduced temperature rise, improved electrolysis efficiency and reduced cost under the same treatment capacity.

Claims

1. A vertical sodium hypochlorite electrolytic cell comprises a shell, electrode plates, insulating gaskets and conducting rods, wherein a water inlet, an air outlet and a water outlet are formed in the shell, anode plates and cathode plates of the electrode plates are alternately arranged and are respectively connected with one conducting rod to be led out of the shell; two adjacent electrode plates and an insulating gasket between the two adjacent electrode plates enclose a chamber for containing electrolyte, and the chamber and the electrolyte flowing through the chamber form an electrolysis unit; the electrode plates are provided with water through holes, and chambers of two adjacent electrolysis units are connected in the vertical direction, so that the electrolyte flows upwards perpendicular to the electrode plates;

the limber holes are discontinuously distributed in a ring shape around the center of the electrode plate, and the limber holes between two adjacent rings are staggered;

the conducting rods comprise a lower conducting rod and an upper conducting rod, the lower conducting rod is connected with the electrode plate at the lowest part and then extends out of the shell, and the upper conducting rod is connected with the electrode plate at the uppermost part and then extends out of one side of the shell;

the water inlet is arranged at the bottom of the first compartment, the exhaust port and the water outlet are fixedly arranged on the upper portion, the exhaust port is arranged at the top of the shell and located above the water outlet, and the upper conductive rod is arranged below the water outlet.

2. The vertical sodium hypochlorite electrolytic cell according to claim 1, wherein the housing is composed of a tubular body and an upper cover plate and a lower cover plate hermetically connected at both ends thereof; the middle part of the electrode plate is provided with a central hole; the insulating gasket comprises a plane annular gasket and an annular gasket with a T-shaped section, the section of the annular gasket with the T-shaped section is of a transverse T-shaped structure, the thickness of the transverse part of the annular gasket is the same as that of the plane annular gasket, the annular gasket is arranged between the peripheries of two adjacent electrode plates, the transverse part of the annular gasket with the T-shaped section is arranged between the peripheries of central holes of the adjacent electrode plates, and the longitudinal two ends of the annular gasket with the T-shaped section are respectively inserted into the inner peripheries of the central holes of the electrode plates; the planar annular gasket is replaced by an annular rim that wraps around the perimeter of the electrode plate.

3. The vertical sodium hypochlorite electrolytic cell according to claim 1, wherein a support frame is provided under the lowermost electrode plate.

4. The vertical sodium hypochlorite electrolytic cell according to claim 1, wherein the insulating gasket is made of fluororubber; the shell is made of transparent materials.