An electrolysis device for treating ship ballast water

Abstract

The invention discloses an electrolysis device for ship ballast water treatment, including an electrolysis power source, an electrode group module group composed of a plurality of electrode group modules, and non-concentric variable-diameter water inlets and non-concentric variable-diameter water outlets respectively located at both ends of the electrode group module group; the electrode group modules, the electrode group modules and the non-concentric variable-diameter water inlets, and the electrode group modules and the non-concentric variable-diameter water outlets are all sealed and connected by flanges. The invention adopts a modular design, and the number of electrode group modules can be determined according to the water treatment volume requirements, so that the equipment is easy to standardize, and a fiberglass shell is adopted, which is light in weight and easy to assemble and maintain.

Description

Technical Field

[0001] The invention relates to the field of marine environmental protection, and more specifically to an electrolysis device for treating ship ballast water. Background Art

[0002] Ship ballast water refers to the water and suspended matter added to a ship to control the ship's heel, trim, draft, stability or stress. Ship ballast water often brings invasive aquatic organisms to a new environment, thereby destroying the normal survival of the new environment's food chain. In order to prevent the spread of harmful aquatic organisms in ship ballast water and cause potential destructive effects, the International Maritime Organization (IMO) passed the "International Convention for the Control and Management of Ships' Ballast Water and Sediments (Draft)" (hereinafter referred to as the Convention) in 2004 to manage and control ship ballast water. The Convention clearly stipulates the treatment standards for ballast water, that is, the types and numbers of survivable organisms in the treated water.

[0003] The mainstream method currently used for ship ballast water treatment technology at home and abroad is electrolysis. The principle of electrolysis is to add oxidizing fungicides to the ballast water to make the residual oxides in the water reach a certain level and maintain it for a certain period of time to kill harmful aquatic organisms in the water, thereby achieving the ballast water performance standard (D-2 standard) specified by the International Maritime Organization (IMO). The shell of the electrolysis device of the ballast water treatment system installed on ships is mostly welded with metal as a whole, which is bulky and inconvenient to install. At the same time, in order to enhance electrical insulation, a layer of rubber or plastic is usually lined on the inner surface of the shell. Due to the low bonding strength between rubber and plastic and the metal shell, cracking and damage often occur, and it is difficult to repair. In addition, the metal material has poor creep resistance. Under high temperature and vibration working conditions, water seepage often occurs in the cover plate and electrode guide column, affecting the normal use of the equipment.

[0004] Therefore, there is an urgent need for an electrolysis device for treating ship ballast water that is light, easy to install, and reliably sealed. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention adopts fiberglass to make a new shell of the electrolysis device to replace the metal shell of the traditional electrolysis device, giving full play to the excellent properties of fiberglass such as small specific gravity, high strength, thermal insulation, ablation resistance and electrical insulation, and provides a ship ballast water treatment electrolysis device that is easy to install and maintain, has reliable sealing and high electrolysis efficiency.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An electrolysis device for treating ship ballast water, comprising an electrolysis power source, an electrode group module group consisting of a plurality of electrode group modules, and a non-concentric variable-diameter water inlet and a non-concentric variable-diameter water outlet respectively located at two ends of the electrode group module group; the electrode group modules, the electrode group modules and the non-concentric variable-diameter water inlet, and the electrode group modules and the non-concentric variable-diameter water outlet are all sealed and connected by flanges;

[0008] The electrode group in the electrode group module includes a plurality of electrode plates, the electrode plates include a cathode plate and an anode plate, the cathode plate and the anode plate are respectively welded to corresponding side plates, the cathode plate and the anode plate are spaced apart and arranged in parallel and plug-in style, the corresponding electrode guide columns are welded to the top surface of the corresponding side plate, and the electrode guide columns are electrically connected to the electrolysis power supply;

[0009] Blind threaded holes are arranged on the top surface of the side plate, and the blind threaded holes are distributed around the electrode guide column. The side plate is fixed to the cover plate by screws matching the blind threaded holes, and a sealing gasket is arranged between the side plate and the cover plate; an O-ring seal is also arranged between the electrode guide column and the cover plate, and the pressure plate presses the O-ring by connecting screws; the cover plate is connected to the outer shell of the electrode group module.

[0010] Furthermore, the interval between adjacent anode plates and cathode plates is 3-15 mm.

[0011] Furthermore, the sealing gasket is a rubber gasket or a polytetrafluoroethylene gasket.

[0012] Furthermore, the non-concentric variable diameter water inlet, the non-concentric variable diameter water outlet and the outer shell of the electrode group module are all made of glass fiber reinforced plastic material.

[0013] Furthermore, the non-concentric variable-diameter water inlet and the non-concentric variable-diameter water outlet have the same structural dimensions, and the installation positions can be adjusted as required; when the electrolysis device is installed horizontally, adjusting the installation positions of the non-concentric variable-diameter water inlet and outlet can allow water to enter from a low position and flow out from a high position, thereby ensuring that the inside of the electrolysis device is in a full tube state, and avoiding that part of the electrode group is not immersed in water when the equipment is running, thereby affecting the water treatment efficiency;

[0014] Furthermore, the number of electrode group modules can be combined according to the water treatment flow requirements.

[0015] The beneficial effects of the present invention are:

[0016] (1) The ship ballast water treatment electrolysis device provided by the present invention adopts a modular design. The number of electrode group modules can be determined according to the water treatment volume requirements, making the equipment easy to standardize. The fiberglass shell is light in weight and easy to assemble and maintain. When the equipment is installed horizontally, the eccentric variable-diameter inlet and outlet can be adjusted to ensure that the equipment is in a full-tube state, overcoming the disadvantage of traditional equipment that the tube is not full and improving the efficiency of the electrode plate.

[0017] (2) In the present invention, the connection between the electrode plate and the side plate, and the connection between the side plate and the electrode guide column are all welded, which ensures good conductivity and avoids local heating caused by poor conductivity and excessive local resistance. Reasonable plate spacing can reduce the resistance to water flow and ensure high electrolysis efficiency. The double sealing structure of the electrode group and the good creep resistance of the stainless steel material greatly reduce the probability of water leakage in high temperature and vibration environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 It is a right view of the electrode group module in the embodiment of the present invention;

[0020] Figure 3 A top view of an electrode group module in an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of an electrode group module in an embodiment of the present invention;

[0022] Figure 5 Schematic diagram of the top surface structure of the electrode group module in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the connection between the electrode group and the cover plate of the electrode group module in an embodiment of the present invention;

[0024] In the figure: 1. non-concentric variable diameter water inlet; 2. non-concentric variable diameter water outlet; 3. electrode group module; 4. electrode guide column; 5. side plate; 6. electrode plate; 7. cover plate; 8. pressure plate; 9. O-ring; 10. screw; 11. sealing gasket; 12. blind threaded hole. Specific embodiments

[0025] The present invention is further described below in conjunction with the accompanying drawings. Example

[0026] like Figures 1 to 6As shown, the ship ballast water electrolysis device of this embodiment includes an eccentric variable diameter water inlet 1, an eccentric variable diameter water outlet 2, and an electrode group module 3. The eccentric variable diameter water inlet 1 and the water outlet 2 are connected to the electrode group module 3 by flange sealing. The number of electrode group modules 3 can be combined according to the actual water treatment flow. In this embodiment, three electrode group modules 3 are combined to form an electrode group module group, and the electrode group modules 3 are connected by flange sealing. The water flow rate treated in this embodiment is 1000 tons / hour, and 3 electrode group modules are used. The outer shell of the electrode group module 3 adopts a DN500 pipe. The eccentric variable diameter water inlet 1 and the water outlet 2 and the outer shell of the electrode group module 3 are made of fiberglass. The electrode group in the electrode group module 3 includes a plurality of electrode plates 6, and the electrode plates 6 include cathode plates and anode plates. The anode plates are made of the same material with the same size, and the cathode plates are made of the same material with the same size. The cathode plates and the anode plates are respectively welded on the corresponding side plates 5, and the cathode plates and the anode plates are arranged in parallel with each other with a spacing of 3 mm; the corresponding electrode guide columns 4 are welded on the top surface of the corresponding side plates 5.

[0027] In order to prevent the anode plate and the cathode plate from contacting each other under the impact of water flow and causing a short circuit during operation, insulating isolation columns are installed on the anode plate and the cathode plate.

[0028] Electrode guide posts 4 are welded on the top surface of the side plate 5. Each electrode guide post 4 of the electrode group module 3 is connected to the electrolytic power source in series or in parallel by connecting copper bars or cables. Blind threaded holes 12 are processed on the top surface of the side plate 5 welded with the electrode guide posts 4. The blind threaded holes 12 are distributed around the electrode guide posts 4. The side plate 5 of the electrode group is fixed to the cover plate 7 by screws 10 matched with the blind threaded holes 12. The sealing surface between the side plate 5 and the cover plate 7 is sealed with a rubber pad 11. In order to ensure reliable sealing, an O-ring 9 is also used for double sealing between the electrode guide posts 4 and the cover plate 7. The pressure plate 8 presses the O-ring 9 by connecting screws 10. The cover plate 7 is connected to the outer shell of the electrode group module 3 by bolts.

[0029] The above description is only for illustrating the present invention. It should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. An electrolysis device for treating ship ballast water, comprising an electrolysis power source, characterized in that: It also includes an electrode group module group composed of a plurality of electrode group modules, and a non-concentric variable diameter water inlet and a non-concentric variable diameter water outlet respectively located at both ends of the electrode group module group; the electrode group modules, the electrode group modules and the non-concentric variable diameter water inlet, and the electrode group modules and the non-concentric variable diameter water outlet are all sealed and connected by flanges; The electrode group in the electrode group module includes a plurality of electrode plates, the electrode plates include a cathode plate and an anode plate, the cathode plate and the anode plate are respectively welded to corresponding side plates, the cathode plate and the anode plate are spaced apart and arranged in parallel and plug-in style, the corresponding electrode guide columns are welded to the top surface of the corresponding side plate, and the electrode guide columns are electrically connected to the electrolysis power supply; Blind threaded holes are arranged on the top surface of the side plate, and the blind threaded holes are distributed around the electrode guide column. The side plate is fixed to the cover plate by screws matching the blind threaded holes, and a sealing gasket is arranged between the side plate and the cover plate; an O-ring seal is also arranged between the electrode guide column and the cover plate, and the pressure plate presses the O-ring by connecting screws; the cover plate is connected to the outer shell of the electrode group module.

2. The electrolysis device according to claim 1, characterized in that: The spacing between adjacent anode plates and cathode plates is 3-15 mm.

3. The electrolysis device according to claim 2, characterized in that: The sealing pad is a rubber pad or a polytetrafluoroethylene pad.

4. The electrolysis device according to claim 3, characterized in that: The non-concentric variable diameter water inlet, the non-concentric variable diameter water outlet and the outer shell of the electrode group module are all made of glass fiber reinforced plastic material.

5. The electrolysis device according to claim 4, characterized in that The non-concentric variable diameter water inlet and the non-concentric variable diameter water outlet have the same structural dimensions.

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