Marine electrolyzer shell and manufacturing process

Abstract

A marine electrolytic cell shell and manufacturing process, wherein the electrolytic cell cylinder (1) is composed of an inner cylinder main pipe (12) and a cylinder glass fiber reinforced plastic reinforcement layer (13) compounded on the outer side thereof; the end flange (3) is composed of an inner end plate (31) and an end plate glass fiber reinforced plastic reinforcement layer (32) compounded on the outer side thereof. The advantages of the present invention are: the electrolytic cell shell is manufactured by using a standard UPVC / PVC pipe and a glass fiber reinforced plastic composite process, and the electrolytic cell shell is ensured to meet the requirements of the use conditions from the aspects of the structural form and the manufacturing process, and has the characteristics of high strength, good insulation, good corrosion resistance, anti-leakage, light weight, simple process, reliable quality and low price. According to the actual ship use, the electrolytic cell shell has good insulation performance, corrosion resistance and seismic effect, and fully meets the use requirements of the ship engine room.

Description

Technical Field

[0001] The invention relates to a structural form and a manufacturing process of an electrolytic cell shell, which is applied to an electrolytic ship ballast water management system. Background Art

[0002] The application medium of the shell of the marine electrolytic cell is a strong oxidizing medium. During use, the electrolytic cell is often damaged due to the superposition of vibration conditions and strong corrosion. Pure fiberglass products will leak under low stress; steel-lined rubber / plastic products are prone to delamination, and the leakage point problem during the production process is difficult to control; polyvinyl chloride products have low strength and are prone to deformation and damage during use. Summary of the invention

[0003] The purpose of the present invention is to provide a marine electrolytic cell shell and a manufacturing process to solve the above problems existing in the prior art.

[0004] The technical solution of the present invention is:

[0005] A marine electrolytic cell shell comprises an electrolytic cell cylinder, a slip-on flange and an end flange, wherein an inlet and an outlet are respectively arranged on the cylinder wall near both ends of the electrolytic cell cylinder, a slip-on flange is respectively mounted on both ends of the electrolytic cell cylinder, and conical end heads are arranged at both ends of the electrolytic cell cylinder; end flanges matching the end flanges are respectively arranged on the outer sides of the slip-on flanges at both ends, and the two are connected to each other by connecting bolts when in use, and is characterized in that the electrolytic cell cylinder is composed of an inner cylinder main pipe and a cylinder glass fiber reinforced plastic reinforcement layer compounded on its outer side; and the end flange is composed of an inner end plate and an end plate glass fiber reinforced plastic reinforcement layer compounded on its outer side.

[0006] The inlet and outlet are composed of an inlet and outlet pipe and an inlet and outlet flange. One end of the inlet and outlet pipe is connected to the cylinder wall of the electrolytic cell cylinder, and the other end of the inlet and outlet pipe is connected to the inlet and outlet flange.

[0007] A manufacturing process of the marine electrolytic cell shell is characterized by comprising the following steps:

[0008] (1) Prepare the mold and spray the gel coat: Design and process the mold, spray the gel coat on the inside of the mold to form a gel coat mold, and then make 2-3 layers of hand-laid resin build-up on the inside of the gel coat mold. After each layer of resin build-up is completed, polish its surface to ensure reliable bonding between adjacent layers;

[0009] (2) Processing of the electrolytic cell cylinder: The cylinder main pipe, cone end, inlet and outlet pipes, and inlet and outlet flanges are welded together to form the electrolytic cell cylinder. After pressure testing to find no leakage, the outer surface is roughened to remove floating dust, and the activator is evenly applied to the outer surface of the cylinder main pipe;

[0010] (3) After the activator is dried, the outer surface of the semi-finished electrolytic cell cylinder processed in the previous step is coated with adhesive (RM-EJ epoxy two-component interface agent): the adhesive must have a large adhesion work and a surface energy lower than the cylinder material. After the adhesive is dried, it is coated with a layer of medium alkali untwisted cloth, and then a layer of unsaturated polyester resin is coated on the surface of the untwisted cloth, and then multiple layers of glass fiber cloth are wrapped;

[0011] (4) Laying vacuum bag materials, sealing system and vacuum system: Lay release cloth, guide cloth and vacuum diaphragm on the outer surface of the semi-finished electrolytic cell cylinder processed in the previous step in sequence. The entire shell structure is completely covered with release cloth, backflow cloth and vacuum diaphragm. A plurality of resin inlet pipes are arranged on the surface of the vacuum diaphragm, and vacuum extraction interfaces are arranged at both ends and connected to the vacuum pump;

[0012] (5) Close each resin inlet pipe, turn on the vacuum pump to continuously evacuate the entire system, and ensure that the pressure loss does not exceed 10% within half an hour of pressure maintenance;

[0013] (6) Introducing resin: After the vacuum inspection is qualified, do not turn off the vacuum pump. Connect the resin inlet pipe to the container with the resin through the injection switch. Open the injection switches from the middle to both sides of the electrolytic cell cylinder in turn to allow the resin to enter the mold cavity from the injection port until the resin completely impregnates the glass fiber cloth and fills the mold cavity. After the mold filling is completed, close the injection port.

[0014] (7) Curing and demoulding: The ambient temperature is controlled between 10℃ and 35℃, and the relative humidity is less than 80%.

[0015] During the curing period, vacuum is continuously drawn to maintain the vacuum pressure in the mold cavity for 5-7 hours to complete the curing and molding. The vacuum diaphragm is removed and the product is taken out of the mold.

[0016] (8) After the surface of the product is polished and smoothed, it is coated with unsaturated resin and molded with the gel coat mold prepared in advance. The mold is opened after 6 hours to complete the preparation of the electrolytic cell shell;

[0017] (9) The end flange and slip-on flange are manufactured using conventional processes. After manufacturing, they are assembled with the electrolytic cell cylinder. After the 7.5 bar pressure test shows no leakage, the preparation of the electrolytic cell shell is completed.

[0018] In the step (2), the activation agent is acetone or other agents that can change the wetting properties of the adhesive on UPVC.

[0019] In the step (3), the thickness of the medium alkali untwisted fabric is 0.1-0.3 mm; the performance of the unsaturated polyester resin must meet the following requirements: Barcol hardness ≥35, heat deformation temperature ≥55°C, bending strength ≥80MPa, bending elastic modulus ≥2700MPa; the winding thickness of the glass fiber cloth is 3-6 mm.

[0020] The advantages of the present invention are: the electrolytic cell shell is made by using a composite process of standard UPVC / PVC pipes and glass fiber reinforced plastics, and the electrolytic cell shell is ensured to meet the requirements of the use conditions from the aspects of structural form and manufacturing process, and has the characteristics of high strength, good insulation, good corrosion resistance, anti-leakage, light weight, simple process, reliable quality and low price. According to the actual ship use, the electrolytic cell shell has good insulation performance, corrosion resistance and earthquake resistance, and fully meets the use requirements of the ship engine room. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the appearance structure of the electrolytic cell shell made by the process of the present invention;

[0022] Figure 2 yes Figure 1 An axial cross-sectional view of the cylinder of the middle electrolytic cell;

[0023] Figure 3 yes Figure 1 Axial section view of the middle flange;

[0024] Figure 4 Figure 3 Right view of;

[0025] Figure 5 yes Figure 1 Schematic diagram of the end face structure of the middle slip-on flange;

[0026] Figure 6 It is a schematic diagram of the structure during vacuum packaging and resin introduction in the manufacturing process of the present invention.

[0027] Explanation of the reference numerals: 1-electrolytic cell cylinder; 11, inlet and outlet; 111-inlet and outlet connecting pipes; 112-inlet and outlet flanges; 12-cylinder main pipe; 13-cylinder FRP reinforcement layer; 14-conical end; 2-slip-on flange; 21-mounting hole; 22-jointing tongue and groove; 3-end flange; 31-end plate; 32-end plate FRP reinforcement layer; 4-connecting bolts; 5, vacuum interface; 6, resin inlet pipe; 7, vacuum diaphragm. DETAILED DESCRIPTION

[0028] See also Figure 1-Figure 5A marine electrolytic cell shell, characterized in that it includes an electrolytic cell cylinder 1, a slip-on flange 2 and an end flange 3, an inlet and outlet 11 are respectively provided on the cylinder wall near the two ends of the electrolytic cell cylinder 1, a slip-on flange 2 is respectively mounted on the two ends of the electrolytic cell cylinder 1, and conical end heads 14 are provided at the two ends of the electrolytic cell cylinder 1; the outer sides of the slip-on flanges 2 at the two ends are respectively provided with end flanges 3 matched therewith, and the two are connected to each other by connecting bolts 4 when used, characterized in that the electrolytic cell cylinder 1 is composed of an inner cylinder main pipe 12 and a cylinder glass fiber reinforced plastic reinforcement layer 13 compounded on the outer side thereof; the end flange 3 is composed of an inner end plate 31 and an end plate glass fiber reinforced plastic reinforcement layer 32 compounded on the outer side thereof.

[0029] The inlet and outlet 11 is composed of an inlet and outlet pipe 111 and an inlet and outlet flange 112 . One end of the inlet and outlet pipe 111 is connected to the cylinder wall of the electrolytic cell cylinder 1 , and the other end of the inlet and outlet pipe 111 is connected to the inlet and outlet flange 112 .

[0030] The materials of each part are as follows:

[0031] The electrolytic cell body 1 and the end flange 3 are made of PVC / UPVC and glass fiber reinforced plastic composite technology.

[0032] Cylinder main pipe 12, inlet and outlet pipes 111: use PVC / UPVC standard pipes.

[0033] Cone end 14 and end plate 3: are processed parts of PVC / UPVC plates.

[0034] Inlet and outlet flanges 112: PVC / UPVC standard flanges.

[0035] The slip-on flange 2 is made of metal.

[0036] The base resin of the cylinder glass fiber reinforced plastic reinforcement layer 13 and the end plate glass fiber reinforced plastic reinforcement layer 32 is unsaturated polyester resin; the glass fiber is filament fiber, chopped strand mat or woven fabric.

[0037] See also Figure 6 The present invention provides a marine electrolytic cell shell and a manufacturing process as follows:

[0038] (1) Prepare the mold and spray the gel coat. Design and process the Figure 1 For the rigid mold shown, the surface of the mold needs to have higher hardness and higher gloss. After spraying the gel coat, do 2-3 layers of hand-layup. The laminated resin needs to be polished to ensure the bonding between the two layers.

[0039] (2) The main pipe of the cylinder, the cone end, the inlet and outlet pipes, and the inlet and outlet flanges are welded and formed. After being pressurized to find no leakage, they are roughened with iron sandpaper to remove floating dust, and the surface is activated with acetone or other chemical reagents;

[0040] (2) Apply adhesive to the surface of the cylinder. The adhesive must have a large adhesion work and a surface energy lower than that of the cylinder material. After the adhesive dries, it is covered with a layer of 0.2 mm medium alkali untwisted cloth and coated with a layer of unsaturated polyester resin.

[0041] (4) Laying out the vacuum bag material, sealing system and vacuum system: first lay out the release cloth, then the guide cloth, and finally the vacuum bag. The entire shell structure should be completely covered by the vacuum bag film.

[0042] (5) After vacuuming and laying the reinforcing materials and vacuum bags, clamp the resin inlet pipes and use a vacuum pump to vacuum the entire system to ensure that the pressure loss does not exceed 10% within half an hour of pressure maintenance.

[0043] (6) After the resin is introduced and the vacuum degree is checked to be qualified, do not turn off the vacuum pump. Insert the injection port into the prepared resin barrel and open the injection port switches in sequence according to the feeding order to allow the resin to enter the mold cavity from the injection port until the resin completely impregnates the permeable medium and fills the mold cavity. Pay attention to the amount of resin during the feeding process. After the mold is filled, close the injection port.

[0044] (7) Curing and demolding. During the curing period, the vacuum pump is not turned off to maintain the vacuum pressure in the mold cavity. The curing and molding are completed according to the curing process of the resin curing system. After the resin gel is cured, the vacuum bag material is removed and the product is taken out of the mold.

[0045] (8) After the surface of the product is polished and smooth, it is coated with unsaturated resin and molded with the gel coat mold prepared in advance. After 6 hours, the mold is opened to complete the preparation of the electrolytic cell shell.

[0046] Specific application examples of the marine electrolytic cell shell made by the present invention:

[0047] Embodiment 1:

[0048] A VLCC ship has a ballast pump parameter of 3000m3 / h*35m and adopts BC3000*2 ballast water treatment system. By using this patent, the electrolyzer shell has good insulation performance, corrosion resistance and earthquake resistance, meeting the requirements for ship engine room use.

[0049] Embodiment 2:

[0050] A 110,000-ton oil tanker has a ballast pump parameter of 2000m3 / h*30m and adopts BC4000*1 ballast water treatment system. By using this patent, the electrolytic cell shell has good insulation performance, corrosion resistance, and earthquake resistance, meeting the requirements for ship engine room use.

[0051] Embodiment 3:

[0052] A 400,000-ton bulk carrier has a ballast pump parameter of 3000m3 / h*35m and adopts BC3000*2 ballast water treatment system. By using this patent, the electrolytic cell shell has good insulation performance, corrosion resistance and earthquake resistance, meeting the requirements for ship engine room use.

Claims

1. A manufacturing process for a marine electrolytic cell shell, the marine electrolytic cell shell comprising: An electrolytic cell cylinder (1), a slip-on flange (2) and an end flange (3), wherein an inlet and outlet (11) are respectively arranged on the cylinder wall near both ends of the electrolytic cell cylinder (1), a slip-on flange (2) is respectively mounted on both ends of the electrolytic cell cylinder (1), and conical end heads (14) are provided at both ends of the electrolytic cell cylinder (1); the outer sides of the slip-on flanges (2) at both ends are respectively provided with end flanges (3) matched therewith, and the two are connected to each other by connecting bolts (4) when in use, and the electrolytic cell cylinder (1) is characterized in that the electrolytic cell cylinder (1) is composed of an inner cylinder main pipe (12) and a cylinder glass fiber reinforced plastic reinforcement layer (13) compounded on the outer side thereof; and the end flange (3) is composed of an inner end plate (31) and an end plate glass fiber reinforced plastic reinforcement layer (32) compounded on the outer side thereof; The inlet and outlet (11) is composed of an inlet and outlet pipe (111) and an inlet and outlet flange (112); one end of the inlet and outlet pipe (111) is connected to the wall of the electrolytic cell cylinder (1), and the other end of the inlet and outlet pipe (111) is connected to the inlet and outlet flange (112); It is characterized in that the manufacturing process of the marine electrolytic cell shell comprises the following steps: (1) Prepare the mold and spray the gel coat: Design and process the mold, spray the gel coat on the inside of the mold to form a gel coat mold, and then make 2-3 layers of hand-laid resin build-up on the inside of the gel coat mold. After each layer of resin build-up is completed, polish its surface to ensure reliable bonding between adjacent layers; (2) Processing of the electrolytic cell cylinder: The cylinder main pipe, cone end, inlet and outlet pipes, and inlet and outlet flanges are welded together to form the electrolytic cell cylinder. After pressure testing to find no leakage, the outer surface is roughened to remove floating dust, and the activator is evenly applied to the outer surface of the cylinder main pipe; (3) After the activator is dried, the outer surface of the semi-finished electrolytic cell cylinder processed in the previous step is coated with adhesive (RM-EJ epoxy two-component interface agent): the adhesive must have a large adhesion work and a surface energy lower than the cylinder material. After the adhesive is dried, it is coated with a layer of medium alkali untwisted cloth, and then a layer of unsaturated polyester resin is coated on the surface of the untwisted cloth, and then multiple layers of glass fiber cloth are wrapped; (4) Laying vacuum bag materials, sealing system and vacuum system: Lay release cloth, guide cloth and vacuum diaphragm on the outer surface of the semi-finished electrolytic cell cylinder processed in the previous step in sequence. The entire shell structure is completely covered with release cloth, backflow cloth and vacuum diaphragm. A plurality of resin inlet pipes are arranged on the surface of the vacuum diaphragm, and vacuum extraction interfaces are arranged at both ends and connected to the vacuum pump; (5) Close each resin inlet pipe, turn on the vacuum pump to continuously evacuate the entire system, and ensure that the pressure loss does not exceed 10% within half an hour of pressure maintenance; (6) Introducing resin: After the vacuum inspection is qualified, do not turn off the vacuum pump. Connect the resin inlet pipe to the container with the resin through the injection switch. Open the injection switches from the middle to both sides of the electrolytic cell cylinder in turn to allow the resin to enter the mold cavity from the injection port until the resin completely impregnates the glass fiber cloth and fills the mold cavity. After the mold filling is completed, close the injection port. (7) Curing and demolding: The ambient temperature is controlled between 10°C and 35°C, and the relative humidity is lower than 80%. During the curing period, vacuum is continuously drawn to maintain the vacuum pressure in the mold cavity for 5-7 hours to complete the curing and molding. The vacuum diaphragm is removed and the product is taken out of the mold. (8) After the surface of the product is polished and smooth, it is coated with unsaturated resin and molded with the gel coat mold prepared in advance. The mold is opened after 6 hours to complete the preparation of the electrolytic cell shell; (9) The end flange and slip-on flange are manufactured using conventional processes. After manufacturing, they are assembled with the electrolytic cell cylinder. After the 7.5 bar pressure test shows no leakage, the preparation of the electrolytic cell shell is completed.

2. The manufacturing process of the marine electrolytic cell shell according to claim 1, characterized in that: In the step (2), the activator is acetone or other reagents that can change the wetting properties of the adhesive on UPVC.

3. The manufacturing process of the marine electrolytic cell shell according to claim 1, characterized in that: In the step (3), the thickness of the medium alkali untwisted fabric is 0.1-0.3 mm; the performance of the unsaturated polyester resin must meet the following requirements: Barcol hardness ≥35, heat deformation temperature ≥55°C, bending strength ≥80MPa, bending elastic modulus ≥2700MPa; the winding thickness of the glass fiber cloth is 3-6 mm.

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