Coating construction method for ship desulfurization port

Abstract

The invention belongs to the technical field of ship manufacturing, and discloses a ship desulfurization port coating construction method which comprises the following steps: trimming and cleaning a to-be-coated area of a desulfurization port; carrying out sand blasting treatment on the finished and cleaned desulfurization port; preparing a vinyl ester glass flake coating; spraying the to-be-coated area of the desulfurization port subjected to sand blasting; and the sprayed desulfurization port is inspected and repaired. According to the coating construction method for the ship desulfurization port, the vinyl ester glass flake coating is sprayed to the ship desulfurization port to serve as an anti-corrosion coating of the desulfurization port, the anti-corrosion capacity of the desulfurization port is effectively enhanced, and the maintenance cost of the desulfurization port is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a painting construction method for a ship desulfurization port. Background Art

[0002] In the prior art, in order to ensure the anti-corrosion performance of the ship desulfurization port, an anti-corrosion layer needs to be provided at the desulfurization port. Rubber lining, epoxy resin or ordinary fiberglass materials are generally used for the anti-corrosion layer, but these anti-corrosion methods have disadvantages such as insufficient heat resistance, poor anti-permeability and low mechanical strength. In addition, the shipbuilding industry is required to reduce carbon emissions throughout the life cycle, and the frequent replacement of the desulfurization port coating will significantly increase carbon emissions. Therefore, there is an urgent need to develop an anti-corrosion technology for ship desulfurization ports with long life and low maintenance requirements. Summary of the Invention

[0003] The purpose of the present invention is to provide a painting construction method for a ship desulfurization port, spraying the ship desulfurization port with vinyl ester glass flake coating as the anti-corrosion coating of the desulfurization port, effectively enhancing the anti-corrosion ability of the desulfurization port and reducing the maintenance cost of the desulfurization port.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A painting construction method for a ship desulfurization port includes the following steps:

[0006] S100. Trim and clean the area to be painted of the desulfurization port;

[0007] S200. Blast the trimmed and cleaned desulfurization port;

[0008] S300. Prepare the vinyl ester glass flake coating;

[0009] S400. Spray the area to be painted of the blasted desulfurization port;

[0010] S500. Inspect and repair the sprayed desulfurization port.

[0011] Preferably, in step S100, trimming the area to be painted of the desulfurization port includes: grinding the gaps, pits, burrs and sharp corners on the area to be painted of the desulfurization port to a smooth state, and finally making the edge of the desulfurization port a smooth arc surface.

[0012] Preferably, in step S100, cleaning the area to be painted of the desulfurization port includes: flushing the desulfurization port with high-pressure water added with a cleaning agent, then flushing the desulfurization port with high-pressure water without the cleaning agent, and then drying the cleaned area.

[0013] Preferably, in step S200, the desulfurization port is sandblasted in a process that goes from bottom to top and from the edge to the middle.

[0014] Preferably, in step S200, the sandblasting pressure range is set to 0.65 MPa - 0.75 MPa, and the roughness range after sandblasting remains at 50 μm - 75 μm.

[0015] Preferably, the vinyl ester glass flake coating is prepared by mixing a base material and a catalyst. The base material is stored in a ventilated and dry place, and the catalyst is stored in a cooling environment below 5°C;

[0016] Step S300 specifically includes:

[0017] S310. Cool down the base material;

[0018] S320. Stir the cooled base material, and add the catalyst during the stirring process, and continue to stir and mix to form the vinyl ester glass flake coating.

[0019] Preferably, in step S400, the vinyl ester glass flake coating is sprayed using a spraying device. The spraying device includes a spraying pump, a spraying gun, and a hose connected between the spraying pump and the spraying gun;

[0020] During the spraying process of the spraying device, the downtime of the spraying device between two adjacent spraying operations is not higher than 5 minutes, and the spraying pump needs to be cleaned regularly.

[0021] Preferably, it further includes a cleaning device for cleaning the spraying device.

[0022] Preferably, in step S500, a high-pressure leak detection point detector is used to inspect the sprayed desulfurization port;

[0023] For the first defect area with insufficient paint thickness, the first defect area needs to be polished to form a smooth and gradually changing slope surface, and then the spraying device is used to perform supplementary spraying on the first defect area;

[0024] For the second defect area where the base material is exposed, the second defect area needs to be supplemented with sandblasting treatment, and then the spraying device is used to perform supplementary spraying on the second defect area.

[0025] Preferably, in steps S200 to S500, the humidity requirement of the construction environment is not higher than 85%, and the base material temperature of the desulfurization port is required to be at least 3°C higher than the real-time dew point temperature of the construction environment.

[0026] Beneficial effects:

[0027] The coating construction method for the ship desulfurization port provided by the present invention first trims and cleans the area to be coated of the desulfurization port. After the trimming and cleaning are completed, the desulfurization port is subjected to sandblasting. After the sandblasting is completed, the prepared vinyl ester glass flake coating is sprayed on the area to be coated of the desulfurization port, and the desulfurization port is inspected and repaired after the spraying is completed. Finally, the spraying work of the anti-corrosion layer for the entire ship desulfurization port is completed. This method sprays the ship desulfurization port with vinyl ester glass flake coating as the anti-corrosion coating of the desulfurization port, effectively enhancing the anti-corrosion ability of the desulfurization port and reducing the maintenance cost of the desulfurization port. Description of the Drawings

[0028] Figure 1 It is a schematic flow chart of the coating construction method for the ship desulfurization port provided by the present invention. Detailed Embodiments

[0029] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0030] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", and other orientation or position relationships are based on the orientation or position relationships shown in the drawings. They are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meaning.

[0033] The present invention provides a coating construction method for a ship desulfurization port. Refer to Figure 1 As shown, the coating construction method for the ship desulfurization port mainly includes the following steps:

[0034] S100. Trim and clean the area to be coated of the desulfurization port;

[0035] S200. Blast the desulfurization port after trimming and cleaning;

[0036] S300. Prepare the vinyl ester glass flake coating;

[0037] S400. Spray the area to be coated of the desulfurization port after blasting;

[0038] S500. Inspect and repair the desulfurization port after spraying.

[0039] In this embodiment, first, the area to be coated of the desulfurization port is trimmed and cleaned. After the trimming and cleaning are completed, the desulfurization port is blasted. After the blasting is completed, the prepared vinyl ester glass flake coating is used to spray the area to be coated of the desulfurization port. And after the spraying is completed, the desulfurization port is inspected and repaired, and finally the spraying work of the anticorrosive layer of the entire ship desulfurization port is completed. This method uses the vinyl ester glass flake coating to spray the ship desulfurization port to serve as the anticorrosive coating of the desulfurization port, effectively enhancing the anticorrosive ability of the desulfurization port and reducing the maintenance cost of the desulfurization port.

[0040] Specifically, the vinyl ester glass flake is a low-VOC environmental protection coating with extremely low permeability and excellent temperature resistance, chemical resistance, abrasion resistance, and impact resistance. It is suitable for a variety of substrates and greatly enhances the anticorrosive ability of the desulfurization port. And the vinyl ester glass flake coating also has reparability, greatly reducing the maintenance cost of the desulfurization port.

[0041] In this embodiment, in step S100, trimming the area to be coated of the desulfurization port includes: grinding the gaps, pits, burrs, and sharp corners on the area to be coated of the desulfurization port to a smooth state, and finally making the edge of the desulfurization port a smooth arc surface.

[0042] Specifically, during the trimming process of the area to be coated at the desulfurization port, it is necessary to grind and trim all surface structural defects such as splashes, gaps, bites, and deep pitting pits, as well as all defects such as burrs, bites, and sharp corners generated by cutting, to achieve a smooth and even state.

[0043] Exemplarily, the edge of the desulfurization port is a circular arc surface with a radius of at least 3 mm.

[0044] In this embodiment, in step S100, cleaning the area to be coated of the desulfurization port includes: flushing the desulfurization port with high-pressure water added with a cleaning agent, then flushing the desulfurization port with high-pressure water without the cleaning agent, and then drying the cleaning area. Specifically, the desulfurization port is flushed with high-pressure hot water added with a cleaning agent, and then the surface is thoroughly rinsed with clean fresh water. After cleaning, the surface of the desulfurization port is required to be free of oil, grease, and other pollutants, reaching a clean and dry state.

[0045] Exemplarily, after cleaning, the salt content on the surface of the area to be coated of the desulfurization port is required to be less than 50 mg / m2.

[0046] In this embodiment, in step S200, the desulfurization port is sandblasted in a process of starting from the bottom and then going up, and starting from the edge and then moving to the middle. Specifically, during the sandblasting construction, the spraying personnel need to first debug the sandblasting gun, adjust the sandblasting gun to the best state, and then select the spraying angle for sandblasting construction.

[0047] In this embodiment, in step S200, the sandblasting pressure range is set to 0.65 MPa - 0.75 MPa, and the roughness range after sandblasting remains at 50 μm - 75 μm. Further, after the sandblasting is completed, it is necessary to clean the surrounding area and blow out the abrasive in the gaps of the scaffolding. The scaffolding boards need to be protected with a film at the bottom to prevent particle pollution during the construction process.

[0048] In this embodiment, the vinyl ester glass flake coating is prepared by mixing a base material and a catalyst. The base material is stored in a ventilated and dry place, and the catalyst is stored in a cooling environment below 5°C.

[0049] Step S300 specifically includes:

[0050] S310, cooling the base material;

[0051] S320, stirring the cooled base material, and adding the catalyst during the stirring process, and continuing to stir and mix to form the vinyl ester glass flake coating.

[0052] Specifically, the base material is stored in a well-ventilated and dry place to prevent direct sunlight, and the catalyst is stored in a refrigerator below 5°C. The vinyl ester glass flake coating is only taken to the site when in use. The base material is placed in a base material barrel, and a temperature strip is randomly placed at the bottom of the base material barrel to monitor the maximum temperature during transportation. The mixing is carried out in a sheltered place. Specifically, a paddle stirrer in the shape of a blade is selected for mechanical stirring. The base material is stirred for more than 5 minutes first, and several sets of base materials are stirred well before spraying. After the spraying personnel are in place, the catalyst is added for mixing, and another person is arranged to time and pay attention to the state of the mixed coating.

[0053] In this embodiment, in step S400, a painting device is used for spraying the vinyl ester glass flake coating. The painting device includes a paint spraying pump, a paint spraying gun, and a hose connected between the paint spraying pump and the paint spraying gun. During the spraying process of the painting device, the downtime of the painting device between two adjacent spraying operations is not higher than 5 minutes, and the paint spraying pump needs to be cleaned regularly. And a cleaning device is also included, which is used for cleaning the painting device.

[0054] Specifically, thinner is also needed during the spraying process, and the thinner is used for cleaning the paint spraying pump. The thinner is stored in a well-ventilated and dry place to prevent direct sunlight.

[0055] Specifically, before spraying, use styrene to circulate the spraying equipment, and do not circulate the paint back to the original barrel. Also, prepare an empty barrel and a barrel of clean thinner for cleaning the paint spraying pump hose and the disassembled paint spraying gun. In addition, two airless spraying devices need to be equipped. While one is used for spraying operations, the other is used to circulate and clean with thinner beside, and is ready to switch to the spraying state at any time.

[0056] Furthermore, the airless spraying device should select a paint spraying pump with a pressure ratio of at least 60:1 and a working flow rate of 4 L / min. All the paint filters in the whole paint spraying pump system should be removed from the paint spraying pump. The hose for transporting the paint is required to be a nylon flow hose with an inner diameter of 10 mm, and hoses with an inner diameter smaller than this size are not suitable for this construction.

[0057] Furthermore, it is necessary to ensure good ventilation during the spraying process, the worker protection measures are in place, and the painting plan is made in advance. Do not leave or interrupt the spraying after the paint is mixed and prepared, otherwise the gun, pipe, and pump will be blocked soon, and the interruption time should not exceed 5 minutes. And use the previously prepared thinner to clean the equipment. Exemplarily, the paint spraying pump needs to be cleaned every 40 minutes of spraying, and the equipment needs to be cleaned every time 2 barrels of paint are sprayed in an environment of 30 - 40°C, and the process takes about 15 minutes.

[0058] Further, before spraying, prepare a smooth test gun board, get familiar with the gun movement, and avoid sagging. For difficult-to-spray parts, pre-coat with a brush. Use the cross-cross method for coating spraying construction to effectively avoid missed coating points. Each barrel of coating should be sprayed within ten minutes, that is, within 20 minutes after the catalyst is added. And it is required that the film thickness of the coating reaches 1000 μm.

[0059] In this embodiment, in step S500, use a high-pressure missed coating point detector to inspect the sprayed desulfurization port; for the first defect area with insufficient paint thickness, the first defect area needs to be polished to form a smooth and gradually changing slope surface, and then use a painting device to supplement the spraying of the first defect area; for the second defect area where the base material is exposed, the second defect area needs to be supplemented with sandblasting treatment, and then use a painting device to supplement the spraying of the second defect area.

[0060] In this embodiment, in steps S200 to S500, the humidity requirement of the construction environment is not higher than 85%, and the base material temperature of the desulfurization port is required to be at least 3°C higher than the real-time dew point temperature of the construction environment.

[0061] In this embodiment, during construction, minimize the storage amount in the workplace as much as possible, just meet the current work requirements, and during construction, the operators should always wear masks and gloves dedicated to chemical protection.

[0062] In this embodiment, after step S500 is completed, it further includes:

[0063] S600. Dispose of the remaining vinyl ester glass flake coating and coating barrels.

[0064] Specifically, dispose of the remaining coating and coating barrels: Use water bath cooling to eliminate the activity of the remaining coating. Do not stack the coating barrels directly together. They must be cooled with water. The containers of the catalyst are also placed together after adding water and cannot be mixed.

[0065] In summary, the coating construction method for the ship desulfurization port provided in this embodiment uses vinyl ester glass flake coating to spray the ship desulfurization port as an anti-corrosion coating for the desulfurization port, effectively enhancing the anti-corrosion ability of the desulfurization port and reducing the maintenance cost of the desulfurization port.

[0066] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A coating construction method for a ship's desulfurization port, characterized in that, It includes the following steps: S100. Trim and clean the area to be coated at the desulfurization port; S200. Conduct sandblasting on the desulfurized port after trimming and cleaning; S300. Prepare vinyl ester glass flake coating; S400. Spray the area to be coated of the sandblasted desulfurization port; S500. Inspect and repair the desulfurization port after spraying.

2. The painting construction method of the ship desulfurization port according to claim 1, characterized in that, In step S100, trimming the area to be coated of the desulfurization port includes: grinding the gaps, pits, burrs, and sharp corners at the area to be coated of the desulfurization port to a smooth state, and finally making the edge of the desulfurization port a smooth arc surface.

3. The painting construction method of the ship's desulfurization port according to claim 1, characterized in that In step S100, cleaning the area to be coated of the desulfurization port includes: flushing the desulfurization port with high-pressure water added with a cleaning agent, then flushing the desulfurization port with high-pressure water without a cleaning agent, and then drying the cleaned area.

4. The painting construction method of the ship's desulfurization port according to claim 1, characterized in that, In step S200, sandblast the desulfurization port in the process of from bottom to top and from edge to middle.

5. The painting construction method of the ship's desulfurization port according to claim 4, characterized in that, In step S200, the sandblasting pressure range is set to 0.65 MPa - 0.75 MPa, and the roughness range after sandblasting remains at 50 μm - 75 μm.

6. The painting construction method of the ship's desulfurization port according to claim 1, characterized in that, The vinyl ester glass flake coating is prepared by mixing a base material and a catalyst. The base material is stored in a ventilated and dry place, and the catalyst is stored in a cooling environment below 5°C; Step S300 specifically includes: S310. Cool down the base material; S320. Stir the cooled base material, and add the catalyst during the stirring process, and continue to stir and mix to form the vinyl ester glass flake coating.

7. The painting construction method of the ship's desulfurization port according to claim 1, characterized in that, In step S400, spray the vinyl ester glass flake coating by using a spraying device. The spraying device includes a spraying pump, a spraying gun, and a hose connected between the spraying pump and the spraying gun; During the spraying process of the spraying device, the downtime of the spraying device between two adjacent spraying operations is not higher than 5 min, and the spraying pump needs to be cleaned regularly.

8. The painting construction method of the ship's desulfurization port according to claim 7, characterized in that, It also includes a cleaning device for cleaning the spraying device.

9. The painting construction method of the ship's desulfurization port according to claim 1, characterized in that, In step S500, use a high-pressure leak detection point detector to inspect the desulfurization port after spraying; For the first defective area with insufficient paint surface thickness, it is necessary to grind a smooth and gradually changing slope surface for the first defective area, and then use a spraying device to supplement the spraying of the first defective area; For the second defective area where the base material is exposed, it is necessary to conduct supplementary sandblasting on the second defective area, and then use a spraying device to supplement the spraying of the second defective area.

10. The painting construction method of the ship desulfurization port according to claim 1, characterized in that, In steps S200 to S500, the humidity requirement of the construction environment is not higher than 85%, and the base material temperature of the desulfurization port is required to be at least 3°C higher than the real-time dew point temperature of the construction environment.

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