Electrochemical softening reactor

Abstract

The invention provides an electrochemical softening reactor, and relates to the technical field of electrochemical softening, the electrochemical softening reactor comprises a shell, an electrolysis zone is arranged in the shell, a connecting slide rail is arranged above the electrolysis zone, the connecting slide rail is used for being electrically connected with a power supply, and an aeration zone connected with the electrolysis zone is arranged below the electrolysis zone; the water outlet area is arranged at the upper end of the shell and is connected with the electrolysis area; the polar plate is inserted into the electrolysis area, and the upper end of the polar plate is slidably and electrically connected with the connecting sliding rail through a connecting part; a traditional plug flow type water inlet mode is changed into an upward flow type water inlet mode, a water flow dead zone is avoided, the polar plates are electrically connected through the connecting sliding rails and the connecting parts, and under the condition that it is guaranteed that the distance between the polar plates is adjustable, the polar plates and a power source are electrically connected conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of electrochemical softening, and more specifically, relates to an electrochemical softening reactor. Background Art

[0002] Calcium and magnesium ions are commonly found in natural water, whether it is groundwater or surface water. Many salts of calcium and magnesium are sparingly soluble salts. Scaling may occur if the solubility product of the sparingly soluble salts is exceeded. In industrial production, scaling will increase the thermal resistance of the heat conduction process and reduce the heat transfer efficiency of the heat exchanger; in wastewater treatment, scaling will clog pipes and equipment; in addition, scaling on the surface of the reverse osmosis membrane will affect the water production and quality. Therefore, it is necessary to remove calcium and magnesium ions from the water, that is, to remove the hardness. Common methods for removing hardness include chemical dosing, ion exchange, and electrochemical softening. Compared with the other two methods, the electrochemical softening method does not require the addition of chemicals, has a high degree of automation, and is easy to separate scale bodies, showing good application prospects. Electrochemical softening technology is a typical active descaling technology, which mainly relies on the water decomposition reaction to create a local strong alkaline environment on the cathode plate. Ca 2+ Mg 2 + With CO3 2- and OH - The reaction generates CaCO3 and Mg(OH)2 precipitates, which are deposited on the cathode plate in solid form. Although electrochemical softening equipment has been industrialized, there are still problems such as unstable water quality, insufficient effectiveness, and high cost in actual application, which limit its application and promotion in industry. Therefore, the research on electrochemical softening technology and the improvement of equipment have never stopped. The research direction of electrochemical softening technology in the prior art is mainly the descaling of cathode materials to ensure the long-term stable operation of the equipment. There is little research on the structure of electrochemical softening devices, such as the layout between the electrolysis zone and other zones, the installation of the plates, the connection structure between the plates and the power supply, etc. During the electrochemical softening process, Ca 2+ Mg 2+ HCO3 is transported from the bulk solution to the cathode plate by convection, diffusion, and electromigration. - It moves to the cathode mainly by convection, so a reasonable reactor design is important for Ca 2+ Mg 2+ 、HCO3 - OH - The full contact has a significant driving effect, which is conducive to achieving the best treatment effect. Summary of the invention

[0003] The purpose of the present invention is to provide an electrochemical softening reactor, which changes the traditional plug-flow water inlet method to an upward flow water inlet method to avoid water flow dead zones, and adopts connecting slide rails and connecting components to realize the electrical connection of the electrode plates, ensuring that the distance between the electrode plates is adjustable, and facilitating the electrical connection between the electrode plates and the power supply.

[0004] In order to achieve the above object, the present invention provides an electrochemical softening reactor, comprising:

[0005] A shell, wherein an electrolysis zone is disposed inside the shell, a connecting slide rail is disposed above the electrolysis zone, the connecting slide rail is used to be electrically connected to a power source, and an aeration zone connected to the electrolysis zone is disposed below the electrolysis zone;

[0006] A water outlet zone, which is arranged at the upper end of the shell and connected to the electrolysis zone;

[0007] The pole plate is inserted in the electrolysis area, and the upper end of the pole plate is slidably and electrically connected to the connecting slide rail through a connecting component.

[0008] Optionally, a vertical partition is provided inside the shell, and the vertical partition divides the inside of the shell into the electrolysis zone and a water inlet zone located on one side of the electrolysis zone, and the lower end of the water inlet zone is connected to the aeration zone.

[0009] Optionally, a water distribution plate is provided at the bottom of the electrolysis zone, the water distribution plate is connected to the lower end of the vertical partition and the inner wall of the shell, and the water distribution plate is provided with a plurality of air distribution holes.

[0010] Optionally, an aeration pipe is provided in the aeration zone, and the aeration pipe extends out of the shell and is used to connect to an aeration device.

[0011] Optionally, a plurality of mounting grooves are respectively provided on opposite side walls of the electrolysis zone, and each of the electrode plates can be inserted into two opposite mounting grooves.

[0012] Optionally, the extending direction of the connecting slide rail is perpendicular to the surface of the electrode plate.

[0013] Optionally, both ends of the connecting slide rail are respectively connected to the shell, and the connecting slide rail is provided with a slide groove along its length direction.

[0014] Optionally, the connecting component is a spring clip, a planar portion is provided at one end of the spring clip, a connecting hole is opened in the planar portion, the planar portion can be fastened to the connecting slide rail by a bolt fastener passing through the connecting hole and the slide groove, and a clamp structure is provided at the other end of the spring clip, and the clamp structure can clamp the pole plate.

[0015] Optionally, the electrode plate comprises a cathode plate and an anode plate, and the upper ends of the cathode plate and the anode plate are provided with conductive connecting parts extending upward, and the conductive connecting parts are electrically connected to the connecting component.

[0016] Optionally, an overflow weir is provided on the side of the upper end of the shell away from the water inlet area, a water outlet trough is provided outside the overflow weir, the water outlet area is formed in the water outlet trough, and a water outlet pipe is provided at the bottom of the water outlet trough.

[0017] The invention provides an electrochemical softening reactor, which has the beneficial effects that: an electrolysis zone is arranged in the shell of the electrochemical softening reactor, a pole plate is installed in the electrolysis zone, an aeration zone is arranged below the electrolysis zone, aerated influent water enters the electrolysis zone from below the electrolysis zone, flows from bottom to top in the electrolysis zone, and discharges water after electrolysis, thereby avoiding water flow dead zone, and for Ca 2+ Mg 2+ 、HCO3 - OH - The full contact has a significant driving effect, thereby improving the treatment effect. The electrode plates are vertically fixed in the electrolysis zone. In order to adjust the distance between the electrode plates, each electrode plate can be inserted in different positions. In order to facilitate the access to the power supply, the connecting slide rail is fixed above the electrolysis zone. The electrode plate is electrically connected to the sliding of the connecting slide rail through the connecting component, which is convenient for adjusting the insertion position of the electrode plate while still being able to conveniently maintain electrical connection with the connecting slide rail and the power supply. This makes the electrochemical softening reactor not only simple in structure, but also convenient for connecting the electrode plate to the power supply and adjusting the distance between the electrode plates.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0020] Figure 1 A schematic diagram of the main structure of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0021] Figure 2 A schematic diagram of the top structure of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic structural diagram of a water distribution plate of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0023] Figure 4A schematic structural diagram of an aeration zone of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0024] Figure 5 A schematic structural diagram of a connecting slide rail of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0025] Figure 6 A schematic diagram of the main structure of the connecting components of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0026] Figure 7 A schematic top view of the structure of the connecting components of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0027] Figure 8 A schematic structural diagram of a cathode plate of a connecting component of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0028] Fig. 9 A schematic structural diagram of an anode plate of a connecting component of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0029] Fig.10 A schematic structural diagram of an overflow weir of an electrochemical softening reactor according to an embodiment of the present invention is shown.

[0030] Description of reference numerals:

[0031] 1. Shell; 2. Electrolysis zone; 3. Connecting slide rail; 4. Aeration zone; 5. Water outlet zone; 6. Connecting parts; 7. Vertical partition; 8. Water inlet zone; 9. Water inlet pipe; 10. Water distribution plate; 11. Water distribution hole; 12. Aeration pipe; 13. Aeration hole; 14. Mounting groove; 15. Slide; 16. Plane part; 17. Clip structure; 18. Connecting hole; 19. Cathode plate; 20. Anode plate; 21. Conductive connecting part; 22. Overflow weir; 23. Water outlet trough; 24. Water outlet pipe. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0033] like Figure 1 and Figure 2 As shown, the present invention provides an electrochemical softening reactor, comprising:

[0034] A shell 1, wherein an electrolysis zone 2 is disposed inside the shell 1, a connecting slide rail 3 is disposed above the electrolysis zone 2, and the connecting slide rail 3 is used to be electrically connected to a power source, and an aeration zone 4 connected to the electrolysis zone 2 is disposed below the electrolysis zone 2;

[0035] The water outlet area 5 is arranged at the upper end of the shell 1 and connected to the electrolysis area 2;

[0036] The pole plate is inserted in the electrolysis area 2, and the upper end of the pole plate is slidably electrically connected to the connecting slide rail 3 through the connecting component 6.

[0037] Specifically, the electrochemical softening reactor shell 1 provided by the present invention is provided with an electrolysis zone 2, and a pole plate is installed in the electrolysis zone 2. The aeration zone 4 is arranged below the electrolysis zone 2. The aerated influent enters the electrolysis zone 2 from below the electrolysis zone 2 and flows from bottom to top in the electrolysis zone 2. The water is discharged after electrolysis to avoid the formation of a dead zone of water flow. It has a significant promoting effect on the full contact of Ca2+, Mg2+, HCO3-, and OH-, thereby improving the treatment effect. The pole plate is vertically fixed in the electrolysis zone 2. In order to adjust the distance between the pole plates, Each electrode plate can be inserted in a different position. In order to facilitate the access of the power supply, the connecting slide rail 3 is fixedly arranged above the electrolysis area 2. The electrode plate is electrically connected to the connecting slide rail 3 through the connecting component 6. It is convenient to maintain electrical connection with the connecting slide rail 3 and the power supply when adjusting the insertion position of the electrode plate. This makes the electrochemical softening reactor not only simple in structure, but also convenient for connecting the electrode plate and the power supply, and for adjusting the spacing between the electrode plates. It can facilitate the electrical connection between the electrode plates and the power supply while ensuring that the spacing between the electrode plates is adjustable.

[0038] Optionally, a vertical partition 7 is provided inside the shell 1 , and the vertical partition 7 divides the inside of the shell 1 into an electrolysis zone 2 and a water inlet zone 8 located on one side of the electrolysis zone 2 , and the lower end of the water inlet zone 8 is connected to the aeration zone 4 .

[0039] Specifically, the two ends of the vertical partition 7 are connected to a pair of opposite side walls of the shell 1, and a gap is formed between the lower end thereof and the bottom plate of the shell 1. An electrolysis zone 2 is formed on one side of the vertical partition 7, and a water inlet zone 8 is formed on the other side of the vertical partition 7. Water can enter the water inlet zone 8 from the upper end, and the water flows downward into the aeration zone 4 after entering. After aeration, the water enters the electrolysis zone 2 from the bottom of the electrolysis zone 2 and forms a flow from bottom to top in the electrolysis zone 2.

[0040] In this embodiment, a water inlet pipe 9 is provided at one side of the upper end of the water inlet area 8 .

[0041] Optionally, a water distribution plate 10 is provided at the bottom of the electrolysis zone 2 , the water distribution plate 10 is connected to the lower end of the vertical partition 7 and the inner wall of the shell 1 , and the water distribution plate 10 is provided with a plurality of air distribution holes.

[0042] Specifically, Figure 3 As shown, the water distribution plate 10 is a perforated plate, so that the water distribution is more uniform.

[0043] Optionally, an aeration pipe 12 is provided in the aeration zone 4, and the aeration pipe 12 extends out of the shell 1 and is used to connect to an aeration device.

[0044] Specifically, Figure 4 As shown, a plurality of aeration pipes 12 are provided in the aeration zone 4, and air is supplied through the aeration device to achieve aeration of the incoming water.

[0045] In this embodiment, the aeration device includes an air pump.

[0046] Optionally, a plurality of mounting grooves 14 are respectively provided on opposite side walls of the electrolysis zone 2 , and each electrode plate can be inserted into two opposite mounting grooves 14 .

[0047] Specifically, a plurality of mounting plates are respectively disposed on a pair of opposite side walls of the electrolysis area 2, and a mounting groove 14 is formed between two adjacent mounting plates for inserting the electrode plates.

[0048] Optionally, the extending direction of the connecting rail 3 is perpendicular to the surface of the electrode plate.

[0049] Specifically, the mounting grooves 14 are arranged along a first direction, and the connecting rails 3 extend along a second direction perpendicular to the first direction.

[0050] Optionally, both ends of the connecting slide rail 3 are respectively connected to the housing 1 , and a slide groove 15 is provided along the length direction of the connecting slide rail 3 .

[0051] Specifically, Figure 5 As shown, the slide groove 15 in the connecting slide rail 3 extends along its length direction, so that the connecting component 6 can slide along the slide groove 15.

[0052] Optionally, the connecting component 6 is a spring clip, a plane portion 16 is provided at one end of the spring clip, and a connecting hole 18 is opened in the plane portion 16. The plane portion 16 can be fastened to the connecting slide rail 3 by a bolt fastener passing through the connecting hole 18 and the slide groove 15. The other end of the spring clip is provided with a clamp structure 17, and the clamp structure 17 can clamp the pole plate.

[0053] Specifically, Figure 6 and Figure 7 As shown, two ends of the flat plate are integrally connected with clamping plates, and a pair of clamping plates are gradually closed to form a clamp structure 17.

[0054] In this embodiment, a guide bending portion is provided at one end of each clamping plate away from the flat plate portion, and a pair of guide bending portions form a gradually expanding structure to facilitate the insertion of the electrode plate.

[0055] Optionally, the electrode plate includes a cathode plate 19 and an anode plate 20 , and the upper ends of the cathode plate 19 and the anode plate 20 are provided with a conductive connection portion 21 extending upward, and the conductive connection portion 21 is electrically connected to the connection component 6 .

[0056] Specifically, Figure 8 and Fig. 9 As shown, the upper ends of the cathode plate 19 and the anode plate 20 are provided with conductive connecting parts 21, which function as terminal blocks. The clamp structure 17 is clamped on the conductive connecting parts 21 to achieve electrical connection between the plates and the power supply.

[0057] In this embodiment, the electrode plates are fixed by upper and lower electrode plate grooves, and the distance between the electrode plates is adjusted by placing the electrode plates in different electrode plate grooves. The material of the anode plate 20 can be graphite, precious metals (such as Pt electrodes, etc.), doped boron diamond (BDD electrodes) electrodes and titanium-based metal oxide electrodes (DSA electrodes), and the material of the cathode plate 19 can be stainless steel, cast iron, carbon steel, etc.

[0058] Optionally, an overflow weir 22 is provided on the side of the upper end of the shell 1 away from the water inlet area 8, a water outlet trough 23 is provided outside the overflow weir 22, a water outlet area 5 is formed in the water outlet trough 23, and a water outlet pipe 24 is provided at the bottom of the water outlet trough 23.

[0059] Specifically, after the influent is aerated and distributed into the electrolysis zone 2 for treatment, it overflows from the overflow weir 22 at the upper end of the electrolysis zone 2 , and the effluent enters the outlet trough 23 and can be discharged through the outlet pipe 24 .

[0060] In this embodiment, the water inlet pipe 9, the aeration pipe 12, and the water outlet pipe 24 can be made of polyvinyl chloride PVC, polyethylene PE, etc. The water inlet flow rate of the water inlet pipe 9 is 0.8-1.2m / s; the gas flow rate in the aeration pipe 12 is 4-5m / s, and the aeration hole 13 is opened directly above the aeration pipe 12. The aperture of the aeration hole 13 is 2mm-4mm, the hole spacing is 10mm-20mm, and the through-hole flow rate is 10-15m / s; the diameter of the water distribution holes 11 on the water distribution plate 10 is 3-5mm, the hole spacing is 10-20mm, and the rectangular array arrangement has a through-hole flow rate of 0.15-0.2m / s; Fig.10 As shown, the overflow weir 22 is a triangular weir, and the load on the weir is 1.7-2.9 L / (m / s).

[0061] In summary, when the electrochemical softening reactor provided by the present invention is used, the requirements for the treated liquid are: electrochemical softening is suitable for water with high hardness and high alkalinity, and contains a certain amount of salt; first connect the peripheral equipment: the water inlet pipe 9 is connected to the water inlet pump, the water outlet pipe 24 is connected to the water production container, the aeration pipe 12 is connected to the air pump, the electrode plate is placed in the electrode plate slot, each electrode plate is connected to the connecting slide rail 3 through the connecting component 6, and the power supply is electrically connected to the connecting slide rail 3; operation: start the water inlet pump, the liquid enters the water inlet area 8 of the electrochemical softening reactor from the water inlet pipe 9, and then Then it flows through the aeration zone 4, passes through the water distribution plate 10 and enters the electrolysis zone 2, and is discharged through the overflow outlet pipe 24 after the electrolysis is completed; during this process, the aeration pump is started, and the gas passes through the water distribution plate 10 through the aeration pipe 12 and the aeration hole 13, enters the electrolysis zone 2, and continues to be aerated on the surface of the electrode plate; and the electrode plate is powered by a DC power supply, which can operate in a steady current mode or a steady voltage mode, and is adjusted to the designed voltage and current through the voltage and current adjustment knobs; when the slurry treatment is completed, the voltage and current of the DC power supply are gradually reduced to 0, and then the aeration pump and the water inlet pump are turned off.

[0062] Take the treatment of sewage in a metal deep processing industrial park as an example: the total hardness of the incoming water is relatively high. In order to ensure the stable operation of the subsequent reverse osmosis system, the sewage needs to be softened and pre-treated. The conventional method uses lime and soda ash to add to the high-density clarification tank to reduce the hardness of the incoming water. Lime and soda ash react with the carbonate hardness in the water to generate CaCO3 and Mg(OH)2 precipitates. The dosage of the agent is generally 1.3-1.4 times the theoretical dosage, and the hardness removal rate is also low. The electrochemical softening reactor of the present invention is used for treatment. The material of the anode plate 20 is selected as DSA electrode, and the material of the cathode plate 19 is selected as stainless steel. The steady flow mode, the current is selected as 2.0A, the plate spacing is 8mm, and the electrolysis time is 10min, 20min and 30min respectively. The test results are shown in the following table.

[0063]

[0064] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An electrochemical softening reactor, characterized in that: include: A shell, wherein an electrolysis zone is disposed inside the shell, a connecting slide rail is disposed above the electrolysis zone, the connecting slide rail is used to be electrically connected to a power source, and an aeration zone connected to the electrolysis zone is disposed below the electrolysis zone; A water outlet zone, which is arranged at the upper end of the shell and connected to the electrolysis zone; The pole plate is inserted in the electrolysis area, and the upper end of the pole plate is slidably and electrically connected to the connecting slide rail through a connecting component.

2. The electrochemical softening reactor according to claim 1, characterized in that: A vertical partition is arranged inside the shell, and the vertical partition divides the inside of the shell into the electrolysis zone and a water inlet zone located on one side of the electrolysis zone, and the lower end of the water inlet zone is connected to the aeration zone.

3. The electrochemical softening reactor according to claim 1, characterized in that: A water distribution plate is arranged at the bottom of the electrolysis zone, the water distribution plate is connected to the lower end of the vertical partition plate and the inner wall of the shell, and the water distribution plate is provided with a plurality of air distribution holes.

4. The electrochemical softening reactor according to claim 1, characterized in that: An aeration pipe is arranged in the aeration zone, and the aeration pipe extends out of the shell and is used to connect an aeration device.

5. The electrochemical softening reactor according to claim 1, characterized in that: A plurality of mounting grooves are respectively arranged on opposite side walls of the electrolysis zone, and each of the electrode plates can be inserted into two opposite mounting grooves.

6. The electrochemical softening reactor according to claim 1, characterized in that: The extending direction of the connecting slide rail is perpendicular to the surface of the electrode plate.

7. The electrochemical softening reactor according to claim 1, characterized in that: Both ends of the connecting slide rail are respectively connected to the housing, and a slide groove is provided along the length direction of the connecting slide rail.

8. The electrochemical softening reactor according to claim 7, characterized in that: The connecting component is a spring clip, one end of which is provided with a planar portion, and the planar portion is provided with a connecting hole. The planar portion can be fastened to the connecting slide rail by a bolt fastener passing through the connecting hole and the slide groove, and the other end of the spring clip is provided with a clamp structure, and the clamp structure can clamp the pole plate.

9. The electrochemical softening reactor according to claim 1, characterized in that: The electrode plate includes a cathode plate and an anode plate. The upper ends of the cathode plate and the anode plate are provided with conductive connecting parts extending upward, and the conductive connecting parts are electrically connected to the connecting component.

10. The electrochemical softening reactor according to claim 1, characterized in that: An overflow weir is arranged on one side of the upper end of the shell away from the water inlet area, a water outlet trough is arranged outside the overflow weir, the water outlet area is formed in the water outlet trough, and a water outlet pipe is arranged at the bottom of the water outlet trough.

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