Alkali washing device for aluminum material

Abstract

The utility model is suitable for the technical field of aluminum material surface treatment devices, and discloses an aluminum material alkali washing device which comprises an alkali washing tank, a liquid outlet pipe, a filter, a first alkali-resisting pump, a plate heat exchanger, a primary filtering assembly and a liquid return pipe. When alkali liquor in the alkali washing tank needs to be heated, the alkali-resisting pump pumps the alkali liquor in the alkali washing tank into the filter through the liquor outlet pipe, and impurities and aluminum scraps generated by alkali washing of aluminum materials in the alkali liquor are intercepted in the filter through the interception effect of the filter, so that the impurities and the aluminum scraps cannot be pumped into a flow channel in the plate heat exchanger along with the alkali liquor; impurities and aluminum scraps are not prone to being accumulated on the inner surface of the plate heat exchanger runner, heat transfer cannot be hindered, and the heat exchange efficiency of the heat exchanger cannot be reduced. The primary filtering assembly is arranged at the first liquid outlet, so that the alkali liquor filtering efficiency is improved, the burden of the filter can be reduced, and the cleaning and replacing frequency of the filter can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum surface treatment devices, and in particular to an aluminum alkaline washing device. Background Technology

[0002] During the production and processing, the aluminum materials (including aluminum tubes and plates) used to assemble supermarket shelves will be contaminated with various oil stains and some insoluble impurities. Therefore, in order to achieve a high degree of cleanliness on the aluminum surface and provide a good foundation for subsequent coating and other treatments, the aluminum materials need to undergo surface treatment operations such as alkaline washing, primary water washing, acid washing, and secondary water washing. Among them, alkaline washing can decompose and remove the oil stains on the surface of the aluminum materials, bringing the surface to a preliminary clean state.

[0003] To improve the decomposition rate of oil stains and achieve better cleaning results in a shorter time, the temperature of the alkaline solution used for alkaline cleaning of aluminum is typically required to be between 40℃ and 70℃. To maintain the alkaline solution within this temperature range, it can be circulated to a heat exchanger. Through heat exchange, the alkaline solution returned to the alkaline cleaning tank is heated and maintained within the appropriate temperature range.

[0004] However, during the alkaline washing of aluminum, impurities and solid particles such as aluminum shavings generated will be transported to the heat exchanger along with the alkaline solution. Larger impurity particles will block the flow channels of the heat exchanger, and impurities are prone to accumulate on the inner surface of the flow channels, hindering heat transfer and reducing heat exchange efficiency. The heat exchanger requires higher energy consumption to ensure that the alkaline solution is heated and maintained within a suitable temperature range.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] The present invention provides an alkaline washing device for aluminum materials, which aims to solve the problem that impurities and aluminum shavings generated during the alkaline washing process will clog the flow channels of the heat exchanger, and that impurities and aluminum shavings will easily accumulate on the inner surface of the flow channels, hindering heat transfer.

[0007] To achieve the above objectives, the solution provided by this utility model is as follows:

[0008] An alkaline washing device for aluminum includes an alkaline washing tank and an outlet pipe connected to a first outlet at the bottom of the alkaline washing tank; it also includes:

[0009] A filter, wherein the inlet and outlet pipes of the filter are connected;

[0010] The first alkali-resistant pump is connected to the second outlet of the filter.

[0011] A plate heat exchanger, wherein the alkaline inlet of the plate heat exchanger is connected to the output end of a first alkali-resistant pump;

[0012] A primary filter assembly is disposed in the alkaline washing tank and located at the first liquid outlet, and the primary filter assembly is evenly distributed with a plurality of first filter holes.

[0013] The return pipe has one end connected to the alkaline outlet of the plate heat exchanger and the other end extending into the alkaline washing tank.

[0014] Optionally, the primary filtration assembly is covered at the first liquid outlet, and the primary filtration assembly includes a first filter screen plate in the shape of an inverted L and a second filter screen plate vertically arranged on both sides of the first filter screen plate.

[0015] Optionally, two lifting rods are connected to the top of the first filter screen; both lifting rods are inverted L-shaped and are placed on top of the alkaline washing tank.

[0016] Optionally, the top surface of the alkaline washing tank is provided with a U-shaped groove for supporting the lifting rod, a fastening screw is inserted into the upper part of the lifting rod, and a threaded hole for inserting the fastening screw is opened on the bottom wall of the U-shaped groove.

[0017] Optionally, the filter includes:

[0018] The filter body has an alkaline solution channel inside.

[0019] A cover plate, which is installed on the filter body;

[0020] The third filter screen is vertically inserted into the alkaline solution channel and faces the inlet.

[0021] A sealing gasket is attached to the bottom of the cover plate and contacts the top surface of the filter body.

[0022] Optionally, the third filter screen is provided with a plurality of second filter holes, the inner diameter of which is smaller than that of the first filter hole.

[0023] Optionally, a screw that is threaded to the top surface of the filter body is inserted into the cover plate, and a hole is provided on the sealing gasket for the screw to pass downward.

[0024] Optionally, the aluminum alkaline washing device further includes a drain pipe and a second alkali-resistant pump; the drain pipe is connected to a third outlet at the bottom of the alkaline washing tank, and the input and output ends of the second alkali-resistant pump are respectively connected to the drain pipe and the wastewater treatment device.

[0025] Optionally, the outlet pipe is equipped with an outlet control valve, and the drain pipe is equipped with a drain control valve.

[0026] Beneficial effects:

[0027] This utility model provides an aluminum alkaline washing device. When it is necessary to heat the alkaline solution in the alkaline washing tank, the alkali-resistant pump draws the alkaline solution from the alkaline washing tank into the filter through the outlet pipe. Through the interception effect of the filter, the impurities and aluminum shavings generated in the alkaline solution due to the alkaline washing of aluminum are intercepted in the filter, so that they will not be drawn into the flow channel of the plate heat exchanger along with the alkaline solution. This makes it difficult for impurities and aluminum shavings to accumulate on the inner surface of the flow channel of the plate heat exchanger, and will not hinder the heat transfer or reduce the heat exchange efficiency of the heat exchanger.

[0028] By setting a primary filter component at the first outlet, large-particle impurities and aluminum shavings in the alkaline solution can be initially intercepted. Then, small-particle impurities and aluminum shavings in the alkaline solution are filtered out by the filter. This not only improves the filtration efficiency of the alkaline solution but also reduces the burden on the filter, thus reducing the frequency of filter cleaning and replacement. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the aluminum alkaline washing device provided by this utility model. Figure 1 .

[0030] Figure 2 yes Figure 1 Enlarged view of section A.

[0031] Figure 3 This is a partial schematic diagram of the top of the alkaline washing tank.

[0032] Figure 4 This is a schematic diagram of the structure of the aluminum alkaline washing device provided by this utility model. Figure 2 .

[0033] Figure 5 This is a schematic diagram showing the connection between the primary filter assembly and the lifting rod.

[0034] Figure 6 This is a schematic diagram of the filter structure.

[0035] Explanation of icon numbers:

[0036] 1-Alkali washing tank; 101-First outlet; 102-U-shaped groove; 1021-Threaded hole; 103-Third outlet;

[0037] 2-Discharge pipe;

[0038] 3-Filter; 31-Filter body; 311-Inlet; 312-Second outlet; 313-Alkali solution channel; 32-Cover plate; 33-Third filter screen; 331-Second filter hole; 34-Sealing gasket; 341-Hole position;

[0039] 4-First alkali-resistant pump;

[0040] 5-Plate heat exchanger;

[0041] 6-Primary filter assembly; 60-First filter hole; 61-First filter screen; 62-Second filter screen;

[0042] 7-Lifting rod; 8-Fasting screw; 9-Return pipe; 10-Drain pipe; 11-Discharge control valve; 12-Drain control valve; 13-Screw. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0045] It should also be noted that when a component is referred to as "fixed to" or "attached to" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0046] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] Please see Figures 1 to 6 This utility model provides an aluminum alkaline washing device, including an alkaline washing tank 1, an outlet pipe 2, a filter 3, a first alkali-resistant pump 4, a plate heat exchanger 5, a primary filter assembly 6, and a return pipe 9.

[0048] Specifically, the alkaline washing tank 1 is filled with an alkaline solution for washing aluminum materials. The alkaline solution is usually an aqueous solution of sodium hydroxide or sodium carbonate. In order to deliver the alkaline solution to the plate heat exchanger 5, the bottom of the alkaline washing tank 1 has a first outlet 101. The outlet pipe 2 is connected to the first outlet 101. The inlet 311 of the filter 3 is connected to the outlet pipe 2. The input end of the first alkali-resistant pump 4 is connected to the second outlet 312 of the filter 3. The alkaline solution inlet of the plate heat exchanger 5 is connected to the output end of the first alkali-resistant pump 4 through an alkali-resistant pipeline (which can be a polyethylene pipe, a polypropylene pipe, or a polytetrafluoroethylene pipe, and the material of other pipes is the same as that of the alkali-resistant pipeline).

[0049] Specifically, the primary filter assembly 6 is located inside the alkaline washing tank 1 and at the first liquid outlet 101, and multiple primary filter assemblies 6 are evenly distributed on the primary filter assembly 6. One end of the return pipe 9 is connected to the alkaline outlet of the plate heat exchanger 5, and the other end of the return pipe 9 extends into the alkaline washing tank 1.

[0050] When the alkaline solution in the alkaline washing tank 1 needs to be heated, the first alkali-resistant pump 4 (the outlet pipe 2 upstream of the inlet of the filter 3 can also be connected to the alkali-resistant pump) pumps the alkaline solution in the alkaline washing tank 1 into the filter 3 through the outlet pipe 2. Through the interception effect of the filter 3, the impurities and aluminum shavings generated in the alkaline solution due to the alkaline washing of aluminum are intercepted in the filter 3, so that they will not be pumped into the flow channel of the plate heat exchanger 5 with the alkaline solution. This makes it difficult for impurities and aluminum shavings to accumulate on the inner surface of the flow channel of the plate heat exchanger 5, and will not hinder the heat transfer or reduce the heat exchange efficiency of the heat exchanger.

[0051] By setting a primary filter assembly 6 at the first outlet 101, large-particle impurities and aluminum shavings in the alkaline solution can be initially intercepted by the primary filter assembly 6. Then, small-particle impurities and aluminum shavings in the alkaline solution are filtered by the filter 3. This not only improves the filtration efficiency of the alkaline solution, but also reduces the burden on the filter 3, thereby reducing the frequency of cleaning and replacement of the filter 3.

[0052] like Figure 1 As shown, in an optional embodiment, the primary filter assembly 6 is disposed over the first outlet 101, and the primary filter assembly 6 includes an inverted L-shaped first filter screen 61 and second filter screens 62 vertically disposed on both sides of the first filter screen 61. The first filter screen 61 and the second filter screens 62 form a semi-enclosed structure, allowing the primary filter assembly 6 to filter the alkaline solution from multiple directions. The first filter screen 61 can intercept impurities flowing horizontally, while the second filter screens 62 on both sides can intercept impurities approaching the first outlet 101 from the sides, forming a relatively three-dimensional filtration space. Compared with a single-structure filter screen, this can more comprehensively filter impurities in the alkaline solution, improve the filtration effect, and ensure that the impurity content in the alkaline solution entering the outlet pipe 2 is as low as possible.

[0053] like Figures 1 to 3 As shown, in an optional embodiment, two lifting rods 7 are detachably connected to the top of the first filter screen 61; both lifting rods 7 are inverted L-shaped and rest on the top of the alkaline washing tank 1. The inverted L-shaped lifting rods 7 provide operators with convenient leverage points. When it is necessary to clean, maintain, or replace the primary filter assembly 6, operators do not need to use additional complicated tools; they can easily lift the primary filter assembly 6 from the alkaline washing tank 1 by simply holding the lifting rods 7.

[0054] Since the lower end of the lifting rod 7 is connected to the first filter screen 61, when the two lifting rods 7 are placed on top of the alkaline washing tank 1, they provide stable support for the primary filter assembly 6, so that the primary filter assembly 6 can be firmly covered at the first liquid outlet 101, avoiding displacement of the primary filter assembly 6 due to water flow impact and other factors during the flow of alkaline solution, and ensuring that the primary filter assembly 6 always maintains a good filtration state.

[0055] like Figures 1 to 3 As shown, in an optional embodiment, the top surface of the alkaline washing tank 1 is provided with a U-shaped groove 102 for supporting the lifting rod 7. A fastening screw 8 is inserted into the upper part of the lifting rod 7, and a threaded hole 1021 for inserting the fastening screw 8 is opened on the bottom wall of the U-shaped groove 102. The U-shaped groove provides a stable support structure for the lifting rod 7, so that the primary filter assembly 6 at the lower end of the lifting rod 7 can be accurately covered at the first liquid outlet 101, preventing it from shifting or shaking under the impact of the alkaline liquid flow, and ensuring that the primary filter assembly 6 always maintains a good filtration state. After the fastening screw 8 is tightened in conjunction with the threaded hole 1021, the lifting rod 7 is firmly fixed in the U-shaped groove, which further enhances the stability of the primary filter assembly 6, ensuring that the alkaline liquid always passes through the primary filter assembly 6 before entering the liquid outlet pipe 2, and can effectively intercept impurities and aluminum chips of large particle size.

[0056] like Figure 6 As shown, in an optional embodiment, the filter 3 includes a filter body 31, a cover plate 32, a third filter screen 33, and a sealing gasket 34. Specifically, the filter body 31 has an alkaline solution channel 313 inside; the cover plate 32 covers the filter body 31; the third filter screen 33 is vertically inserted into the alkaline solution channel 313, and the third filter screen 33 faces the liquid inlet 311; the sealing gasket 34 is attached to the bottom of the cover plate 32, and the sealing gasket 34 is in contact with the top surface of the filter body 31.

[0057] By providing an alkali solution channel 313 inside the filter body 31, a path can be provided for the flow of alkali solution, allowing it to pass through the third filter screen 33 in an orderly manner. The third filter screen 33 is vertically inserted into the alkali solution channel 313 and faces the inlet 311, so that when the alkali solution enters the filter 3 from the inlet 311, the third filter screen 33 can effectively intercept small-diameter impurities and aluminum shavings in the alkali solution.

[0058] By covering the filter body 31 with a cover plate 32 and attaching a sealing gasket 34 to the bottom of the cover plate 32, a good seal is formed between the cover plate 32 and the filter body 31, ensuring that the alkali solution can only flow in the alkali solution channel 313 along a predetermined path and be filtered through the third filter screen plate 33, thus ensuring the stability of the filtration effect.

[0059] Specifically, in order to allow the third filter screen 33 to be vertically inserted into the alkali channel 313, the inner wall of the alkali channel 313 can be provided with a slot (not shown in the attached figure) that mates with the third filter screen 33. Of course, the third filter screen 33 can also be detachably installed at the bottom of the cover plate 32, so that when the cover plate 32 is placed on the filter body 31, the third filter screen 33 can be vertically inserted into the alkali channel 313.

[0060] It should be noted that the first filter plate 61, the second filter plate 62, and the third filter plate 33 can all be stainless steel filter plates, which can resist the corrosion of alkaline solutions, thus allowing the filter plates to be used for a longer period of time.

[0061] like Figure 6 As shown, in an optional embodiment, the third filter plate 33 is provided with a plurality of second filter holes 331. The inner diameter of the second filter holes 331 is smaller than the inner diameter of the primary filter assembly 60, so that the third filter plate 33 can further filter out the fine impurities that still exist after being filtered by the primary filter assembly 60, ensuring that the alkaline solution entering the flow channel of the plate heat exchanger 5 is cleaner, preventing impurities from accumulating in the flow channel, and maintaining the heat exchange efficiency of the plate heat exchanger 5.

[0062] like Figure 6As shown, in an optional embodiment, a screw 13 is inserted into the cover plate 32 and threadedly connected to the top surface of the filter body 31, and a hole 341 is provided on the sealing gasket 34 for the screw 13 to pass downwards. The screw 13 threadedly connected to the top surface of the filter body 31 can tightly fix the cover plate 32 to the filter body 31. During the flow of alkaline solution, there is a certain pressure inside the filter 3, and the threaded connection can effectively resist the pressure, prevent the cover plate 32 from loosening or falling off, and ensure the stability of the entire filter 3 structure. Compared with other connection methods, the threaded connection has a better fastening effect, ensuring that the cover plate 32 and the filter body 31 are always tightly connected during long-term use, maintaining good filtration performance.

[0063] The hole 341 on the sealing gasket 34 allows the screw 13 to pass through. When the screw 13 is tightened, the sealing gasket 34 is pressed between the cover plate 32 and the filter body 31. The sealing gasket 34 itself has good elasticity and sealing performance. When pressed, it can fill the tiny gaps between the cover plate 32 and the filter body 31, effectively preventing alkali leakage.

[0064] like Figure 1 As shown, in an optional embodiment, the aluminum alkaline washing device further includes a drain pipe 10 and a second alkali-resistant pump (not shown in the attached diagram); the drain pipe 10 is connected to a third outlet 103 at the bottom of the alkaline washing tank 1, and the input and output ends of the second alkali-resistant pump are respectively connected to the drain pipe 10 and the wastewater treatment device. The wastewater treatment device can be the oily wastewater treatment device disclosed in CN208454691U. When the oil and impurities in the alkaline solution reach a certain concentration, affecting the alkaline washing effect, the second alkali-resistant pump is activated, and the waste alkaline solution is transported to the wastewater treatment device through the drain pipe 10 for treatment, reducing the environmental impact of the wastewater.

[0065] like Figure 1 As shown, in an optional embodiment, the outlet pipe 2 is equipped with an outlet control valve 11, and the drain pipe 10 is equipped with a drain control valve 12. By controlling the outlet control valve 11 and the drain control valve 12, the alkaline solution in the alkaline washing tank 1 can selectively flow to the plate heat exchanger 5 or the wastewater treatment device.

[0066] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An apparatus for caustic washing of aluminum material, comprising a caustic washing tank (1) and a liquid outlet pipe (2) connected with a first liquid outlet (101) at the bottom of the caustic washing tank (1); characterized in that, Also includes: The filter (3) is connected to the inlet (311) and outlet (2); The first alkali-resistant pump (4) is connected to the input end of the first alkali-resistant pump (4) and the second outlet (312) of the filter (3); Plate heat exchanger (5), the alkaline inlet of the plate heat exchanger (5) is connected to the output end of the first alkali-resistant pump (4); Primary filter assembly (6), the primary filter assembly (6) is disposed in the alkaline washing tank (1) and located at the first liquid outlet (101), and a plurality of first filter holes (60) are evenly distributed on the primary filter assembly (6). The return pipe (9) is connected at one end to the alkaline outlet of the plate heat exchanger (5), and the other end of the return pipe (9) extends into the alkaline washing tank (1).

2. The apparatus according to claim 1, wherein The primary filter assembly (6) is covered at the first liquid outlet (101), and the primary filter assembly (6) includes a first filter screen plate (61) in the shape of an inverted L and a second filter screen plate (62) vertically arranged on both sides of the first filter screen plate (61).

3. The apparatus according to claim 2, wherein The top of the first filter screen (61) is connected to two lifting rods (7); both lifting rods (7) are inverted L-shaped and are placed on the top of the alkaline washing tank (1).

4. The apparatus according to claim 3, wherein The top surface of the alkaline washing tank (1) is provided with a U-shaped groove (102) for supporting the lifting rod (7), and a fastening screw (8) is inserted into the upper part of the lifting rod (7). A threaded hole (1021) for inserting the fastening screw (8) is opened on the bottom wall of the U-shaped groove (102).

5. The apparatus according to claim 1, wherein The filter (3) includes: The filter body (31) has an alkaline channel (313) inside. A cover plate (32) is provided on the filter body (31); The third filter plate (33) is vertically inserted into the alkaline solution channel (313) and faces the liquid inlet (311). A sealing gasket (34) is attached to the bottom of the cover plate (32) and the sealing gasket (34) is in contact with the top surface of the filter body (31).

6. The apparatus according to claim 5, wherein The third filter plate (33) has a plurality of second filter holes (331) evenly distributed on it, and the inner diameter of the second filter hole (331) is smaller than the inner diameter of the first filter hole (60).

7. The apparatus according to claim 6, wherein The cover plate (32) is fitted with a screw (13) that is threaded to the top surface of the filter body (31), and the sealing gasket (34) is provided with a hole (341) for the screw (13) to pass downward.

8. The apparatus according to claim 1, wherein It also includes a drain pipe (10) and a second alkali-resistant pump; the drain pipe (10) is connected to the third outlet (103) at the bottom of the alkali washing tank (1), and the input end and output end of the second alkali-resistant pump are respectively connected to the drain pipe (10) and the wastewater treatment device.

9. The apparatus according to claim 8, wherein The outlet pipe (2) is equipped with an outlet control valve (11), and the drain pipe (10) is equipped with a drain control valve (12).

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