Method for removing aluminum oxide film of spraying plate

Abstract

The invention belongs to the technical field of aluminum oxide film removal processes, and provides a method for removing an aluminum oxide film on a spraying plate. The removal method comprises the following steps: (1) removing an aluminum oxide film on the surface of a spraying plate through sand blasting; (2) removing the aluminum oxide film on the hole wall of the spraying hole of the spraying plate through liquid medicine; the liquid medicine comprises the following components in parts by weight: 55-65 parts of ammonia water with the concentration of 25-28%, 18-22 parts of hydrogen peroxide with the concentration of 25-70%, 12-18 parts of acetic acid with the concentration of 2-10% and 2-7 parts of hydrofluoric acid with the concentration of 30-33%; (3) a plug gauge is adopted to detect the injection holes until it is ensured that each injection hole can pass through the plug gauge; and (4) drying the spraying plate. According to the removing method, the time for removing the aluminum oxide film layer of the spraying plate can be remarkably shortened by adopting the special liquid medicine and combining the special jig, aluminum oxide films on the surface of the spraying plate and the spraying holes are thoroughly removed, the spraying plate is not damaged, and the cleaning efficiency of the spraying plate is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum oxide film removal technology, and in particular relates to a method for removing an aluminum oxide film from a shower plate. Background Art

[0002] In solar energy devices, there is an aluminum material equipment that needs to be sprayed with aluminum oxide after running on the machine for a period of time. The aluminum material equipment is equipped with a spray plate, and there are multiple spray holes on the spray plate for spraying aluminum oxide. However, the aperture of the spray hole is very small. After long-term use, a layer of aluminum oxide will adhere to the surrounding and inner wall of the spray hole. If it is not handled in time, the hole will be blocked and cannot be used. Therefore, cleaning the spray plate is particularly important.

[0003] The main steps of cleaning the spray plate include: removing the aluminum oxide film on the surface of the spray plate and the inner wall of the spray hole without damaging the aluminum equipment.

[0004] In the entire cleaning and regeneration industry, due to the special location of the injection hole and the stable film quality, the removal process of aluminum oxide on the inner wall of the injection hole is very difficult. Since the body is made of aluminum, strong acids and strong alkalis cannot be used.

[0005] At present, the cleaning is usually carried out by sandblasting the surface of the spray plate and forcibly opening the spray hole with a plug gauge. However, the above method not only has a low aluminum oxide removal rate, but also easily breaks the plug gauge in the pore, making it difficult to remove, causing pore blockage. In addition, it takes about 1 day to open a spray plate.

[0006] Therefore, there is an urgent need for a more efficient cleaning method to improve the cleaning effect and cleaning performance of the spray plate. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a method for removing the aluminum oxide film on the spray plate. The removal method adopts a special potion in combination with a specific fixture, which can not only significantly shorten the time for removing the aluminum oxide film layer on the spray plate, but also completely remove the aluminum oxide film on the surface of the spray plate and the injection hole without any damage to the spray plate, thereby significantly improving the cleaning efficiency of the spray plate.

[0008] In order to achieve the above object, the solution adopted by the present invention is:

[0009] A method for removing aluminum oxide film from a spray plate comprises: (1) removing the aluminum oxide film on the surface of the spray plate by sandblasting; (2) removing the aluminum oxide film on the hole wall of the spray hole of the spray plate by using a chemical solution; the chemical solution comprises, by weight, 55-65 parts of ammonia water with a concentration of 25-28%, 18-22 parts of hydrogen peroxide with a concentration of 25-70%, 12-18 parts of acetic acid with a concentration of 2-10%, and 2-7 parts of hydrofluoric acid with a concentration of 30-33%; (3) detecting the spray hole by using a plug gauge to ensure that each spray hole can pass the plug gauge; and (4) drying the spray plate.

[0010] Furthermore, in a preferred embodiment of the present invention, by weight, the ammonia water is 60 parts, the hydrogen peroxide is 20 parts, the acetic acid is 15 parts and the hydrofluoric acid is 5 parts.

[0011] Furthermore, in a preferred embodiment of the present invention, step (2) includes: placing the spray plate in a jig and using a chemical solution to rinse and remove the aluminum oxide film; the jig includes a rectangular containing frame, and partition plates arranged in the containing frame at intervals along the length direction of the containing frame; a containing groove for placing the spray plate is formed between the first partition plate and the side wall of the containing frame, between the last partition plate and the other side wall of the containing frame, and between two adjacent partition plates; a connecting hole is opened at a position corresponding to the partition plate and the injection hole; and a liquid inlet hole and a liquid outlet hole are respectively opened on the two side walls.

[0012] Furthermore, in a preferred embodiment of the present invention, the thickness of the aluminum oxide film is 0.3-2 mm.

[0013] Furthermore, in a preferred embodiment of the present invention, the area of ​​the aluminum oxide film is 0.1-0.3m 2 .

[0014] Furthermore, in a preferred embodiment of the present invention, the pressure of the liquid medicine during inlet is 0.3-0.5 MPa, and the flushing time is 1.5-2.5 hours.

[0015] Furthermore, in a preferred embodiment of the present invention, in step (1), the sandblasting pressure is 3-5 bar, and the sandblasting time is 60-85 min.

[0016] Furthermore, in a preferred embodiment of the present invention, in step (1), glass beads with a diameter of G220 are used for sandblasting.

[0017] Furthermore, in a preferred embodiment of the present invention, in step (4), the drying conditions include: constant temperature of 150-200° C. for 1.5-2.5 hours.

[0018] Furthermore, in a preferred embodiment of the present invention, in step (3), the diameter of the plug gauge is 0.45 mm.

[0019] The beneficial effects of the method for removing aluminum oxide film from a shower plate provided by the present invention are:

[0020] (1) The method for removing the aluminum oxide film on the spray plate provided by the present invention adopts a combination of sandblasting and special potions to remove the aluminum oxide film. The product surface is first sandblasted to remove the film, and then the injection hole is flushed with special potions to completely remove the aluminum oxide film on the wall of the injection hole, thereby achieving the purpose of quickly and efficiently removing the aluminum oxide film on the spray plate, and can significantly shorten the time for removing the aluminum oxide film layer on the spray plate without causing any damage to the spray plate.

[0021] (2) The method for removing the aluminum oxide film on the spray plate provided by the present invention uses a special potion in a fixture with a specific structure to flush the walls of the spray holes in the spray plate. This not only enables flushing of multiple spray plates at one time, but also facilitates pressurizing the potion to achieve the purpose of quickly and thoroughly cleaning the aluminum oxide film in the spray holes, thereby significantly improving the efficiency of film removal.

[0022] (3) In the method for removing the aluminum oxide film on the spray plate provided by the present invention, the sandblasting pressure is controlled within a specific range during the sandblasting removal process, which can not only quickly remove the aluminum oxide film on the surface of the spray plate but also cause no damage to the spray plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a three-dimensional diagram of a shower plate provided in Experimental Example 1 of the present invention;

[0025] Figure 2 is a three-dimensional diagram of the fixture provided in Experimental Example 1 of the present invention;

[0026] Figure 3 is a perspective view of the first part of the fixture provided in Experimental Example 1 of the present invention with the shower plate placed thereon;

[0027] Figure 4 is a perspective view of the second part of the fixture provided in Experimental Example 1 of the present invention with the shower plate placed thereon;

[0028] Icon: 10-spray plate, 100-injection hole, 20-jig, 210-receiving frame, 220-partition plate, 230-receiving groove, 240-connecting hole, 250-liquid inlet hole, 260-liquid outlet hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0030] The following is a detailed description of a method for removing an aluminum oxide film on a shower plate provided by an embodiment of the present invention.

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] Example 1

[0033] This embodiment provides a method for removing an aluminum oxide film on a shower plate 10, comprising:

[0034] (1) The aluminum oxide film on the surface of the shower plate 10 is removed by sandblasting with glass beads having a diameter of G220. The sandblasting pressure is 4 bar and the sandblasting time is 75 min.

[0035] (2) The spray plate 10 is placed in a fixture 20 and rinsed with liquid medicine to remove the aluminum oxide film on the hole wall of the injection hole 100 of the spray plate 10; the fixture 20 includes a rectangular container frame 210, and partition plates 220 arranged in the container frame 210 at intervals along the length direction of the container frame 210; a container groove 230 for placing the spray plate 10 is formed between the first partition plate 220 and the side wall of the container frame 210, between the last partition plate 220 and the other side wall of the container frame 210, and between two adjacent partition plates 220; a connecting hole 240 is opened at the position corresponding to the injection hole 100 of the partition plate 220; a liquid inlet hole 250 and a liquid outlet hole 260 are opened on the two side walls respectively; the pressure of the liquid medicine during the injection is 0.4MPa, and the rinsing time is 2h;

[0036] In terms of weight, the medicine solution includes 55 parts of 25% ammonia water, 22 parts of 70% hydrogen peroxide, 12 parts of 2% acetic acid, and 7 parts of 33% hydrofluoric acid;

[0037] (3) Use a plug gauge with a diameter of 0.45 mm to inspect the injection hole 100 to ensure that each injection hole 100 can pass the 0.45 mm plug gauge;

[0038] (4) Dry the spray plate 10 at a constant temperature of 180° C. for 2 h.

[0039] Example 2

[0040] This embodiment provides a method for removing the aluminum oxide film on the spray plate, which is different from Embodiment 1 in that: in step (2), the chemical solution includes, by weight, 65 parts of 28% ammonia water, 18 parts of 25% hydrogen peroxide, 18 parts of 10% acetic acid, and 2 parts of 30% hydrofluoric acid.

[0041] Example 3

[0042] This embodiment provides a method for removing the aluminum oxide film on the spray plate, which is different from Embodiment 1 in that: in step (2), the chemical solution includes, by weight, 60 parts of 26% ammonia water, 20 parts of 50% hydrogen peroxide, 15 parts of 5% acetic acid, and 5 parts of 32% hydrofluoric acid.

[0043] Example 4

[0044] This embodiment provides a method for removing aluminum oxide film on a spray plate, which is different from Embodiment 3 in that: in step (2), the pressure of the liquid when the medicine is introduced is 0.3 MPa, and the flushing time is 1.5 h.

[0045] Example 5

[0046] This embodiment provides a method for removing aluminum oxide film on a spray plate, which is different from Embodiment 3 in that: in step (2), the pressure of the liquid when the medicine is introduced is 0.5 MPa, and the flushing time is 2.5 h.

[0047] Example 6

[0048] This embodiment provides a method for removing an aluminum oxide film on a shower plate, which is different from Embodiment 3 in that: in step (1), the sandblasting pressure is 3 bar and the sandblasting time is 85 min.

[0049] Example 7

[0050] This embodiment provides a method for removing aluminum oxide film on a spray plate, which is different from Embodiment 3 in that: in step (1), the sandblasting pressure is 5 bar and the sandblasting time is 60 min.

[0051] Example 8

[0052] This embodiment provides a method for removing the aluminum oxide film on the spray plate, which is different from Embodiment 3 in that: in step (4), the drying condition is to dry the spray plate at a constant temperature of 150° C. for 2.5 hours.

[0053] Example 9

[0054] This embodiment provides a method for removing aluminum oxide film from a spray plate, which is different from Embodiment 3 in that: in step (4), the drying condition is to dry the spray plate at a constant temperature of 200° C. for 1.5 hours.

[0055] Comparative Example 1

[0056] This comparative example provides a method for removing aluminum oxide film from a spray plate. This comparative example provides a method for removing aluminum oxide film from a spray plate. The difference from Example 3 is that in step (2), a plug gauge with a diameter of 0.45 mm is used to knock and remove the residual film in each spray hole of each spray plate.

[0057] Comparative Example 2

[0058] This comparative example provides a method for removing the aluminum oxide film on the spray plate, which is different from Example 3 in that: in step (2), the chemical solution includes, by weight, 50 parts of 20% ammonia water, 25 parts of 80% hydrogen peroxide, 10 parts of 1% acetic acid, and 10 parts of 34% hydrofluoric acid.

[0059] Comparative Example 3

[0060] This comparative example provides a method for removing aluminum oxide film on a spray plate, which is different from Example 3 in that: in step (2), the pressure of the liquid when the medicine is introduced is 0.2 MPa, and the flushing time is 3 hours.

[0061] Comparative Example 4

[0062] This comparative example provides a method for removing the aluminum oxide film on the spray plate, which is different from Example 3 in that: in step (1), the sandblasting pressure is 2 bar and the sandblasting time is 100 min.

[0063] Experimental Example 1

[0064] Experimental method: Observe the removal of aluminum oxide on the surface of the spray plates of Examples 1-9 and Comparative Examples 1-4 (taking the treatment of one spray plate as an example) and the time consumed. The results are shown in Table 1:

[0065] Table 1

[0066]

[0067]

[0068] The results in Table 1 show that the method for removing the aluminum oxide film of the shower plate provided in Examples 1-9 of the present application can completely remove the aluminum oxide film layer of the shower plate. Compared with the traditional method (Comparative Example 1), not only is the removal complete, but the time consumption is significantly shortened without any damage to the surface of the substrate. Compared with Comparative Examples 2-4, Examples 1-9 of the present application can completely remove the aluminum oxide film layer of the shower plate without any damage to the surface of the substrate.

[0069] In summary, the method for removing the aluminum oxide film on the spray plate provided by the present invention is adopted; the removal method can not only significantly shorten the time for removing the aluminum oxide film layer on the spray plate, but also completely remove the aluminum oxide film on the surface of the spray plate and the injection hole without any damage to the spray plate, thereby significantly improving the cleaning efficiency of the spray plate.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for removing aluminum oxide film from a shower plate, characterized in that: include: (1) removing the aluminum oxide film on the surface of the shower plate by sandblasting; (2) removing the aluminum oxide film on the hole wall of the spray hole of the spray plate by using a liquid medicine; the liquid medicine comprises, by weight, 55-65 parts of ammonia water with a concentration of 25-28%, 18-22 parts of hydrogen peroxide with a concentration of 25-70%, 12-18 parts of acetic acid with a concentration of 2-10%, and 2-7 parts of hydrofluoric acid with a concentration of 30-33%; (3) using a plug gauge to inspect the injection holes to ensure that each of the injection holes can pass through the plug gauge; (4) Drying the spray plate.

2. The method for removing aluminum oxide film from a shower plate according to claim 1, characterized in that: In parts by weight, the aqueous ammonia is 60 parts, the hydrogen peroxide is 20 parts, the acetic acid is 15 parts, and the hydrofluoric acid is 5 parts.

3. The method for removing aluminum oxide film from a shower plate according to claim 1, characterized in that: Step (2) includes: placing the spray plate in a fixture and using the liquid medicine to rinse and remove the aluminum oxide film; The fixture includes a rectangular containing frame, and partition plates arranged in the containing frame at intervals along the length direction of the containing frame; a containing groove for placing the spray plate is formed between the first partition plate and the side wall of the containing frame, between the last partition plate and the other side wall of the containing frame, and between two adjacent partition plates; a connecting hole is opened at the position of the partition plate corresponding to the injection hole; and a liquid inlet hole and a liquid outlet hole are respectively opened on the two side walls.

4. The method for removing aluminum oxide film from a shower plate according to claim 3, characterized in that: The thickness of the aluminum oxide film is 0.3-2 mm.

5. The method for removing aluminum oxide film from a shower plate according to claim 4, characterized in that: The area of ​​the aluminum oxide film is 0.1-0.3m 2 .

6. The method for removing aluminum oxide film from a shower plate according to claim 5, characterized in that: The pressure of the medicine solution during liquid inflow is 0.3-0.5MPa, and the flushing time is 1.5-2.5h.

7. The method for removing aluminum oxide film from a shower plate according to claim 5, characterized in that: In step (1), the sandblasting pressure is 3-5 bar, and the sandblasting time is 60-85 min.

8. The method for removing aluminum oxide film from a shower plate according to claim 1, characterized in that: In step (1), glass beads with a diameter of G220 are used for sandblasting.

9. The method for removing aluminum oxide film from a shower plate according to claim 1, characterized in that: In step (4), the drying conditions include: constant temperature of 150-200° C. for 1.5-2.5 hours.

10. The method for removing aluminum oxide film from a shower plate according to claim 1, characterized in that: In step (3), the diameter of the plug gauge is 0.45 mm.

Images