Anodizing solution aluminum removal and recovery recycling system

Abstract

The utility model relates to wastewater recovery treatment technical field, especially a kind of anodic oxidation liquid aluminium removal recovery circulation system.It is the system including anode tank, filter equipment, coarse acid tank, high pressure membrane equipment, mother liquor transfer tank, column chromatography aluminium removal equipment and acid production tank;Anode tank containing anodic oxidation liquid is sequentially connected with filter equipment, coarse acid tank, mother liquor transfer tank, column chromatography aluminium removal equipment and acid production tank by pipeline, acid production tank is connected anode tank by back acid pipeline, to form circulation system;Coarse acid tank is connected high pressure membrane equipment by high pressure membrane pipeline, and the outlet of high pressure membrane equipment is connected acid production tank by pipeline.The system uses high pressure membrane and column chromatography to carry out aluminium removal and acid concentration treatment to the anodic oxidation liquid that has not met the requirements, then concentrated acid is returned to anode tank and recycled, the whole system forms a cycle, to realize the auxiliary stable maintenance to the anodic oxidation liquid in anode tank, to improve resource utilization, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater recycling and treatment technology, and in particular to an aluminum removal and recycling system for anodizing solution. Background Technology

[0002] Anodizing is a conventional metal processing technique. Over time, the aluminum content in the anodizing solution used in this process increases, eventually causing it to fail to meet process requirements and become waste liquid. This waste liquid is a complex and highly polluting industrial wastewater. This wastewater poses numerous hazards. The most significant hazards are as follows: Extremely high acidity or alkalinity: This mainly originates from cleaning water in processes such as oxidation tanks, neutralization tanks, and sealing tanks. High-concentration acidic or alkaline wastewater can corrode sewer pipes, wastewater treatment facilities, and buildings. When discharged into natural water bodies, it drastically alters the pH level, causing mass mortality of aquatic organisms and severely disrupting the balance of the aquatic ecosystem. Excessively high acidity or alkalinity can severely interfere with the activity of microorganisms in subsequent biological treatment systems, leading to the failure of the entire wastewater treatment system.

[0003] High concentrations of aluminum pollution primarily occur because aluminum and its alloys are the substrates used in anodizing. During oxidation and subsequent dyeing and sealing processes, aluminum dissolves into the wastewater in various forms. Aluminum is not an essential element for the human body, and excessive aluminum has a clear toxic effect on the nervous system, skeletal system, and hematopoietic function. For aquatic organisms, especially fish, aluminum ions can damage their gill function, leading to suffocation and death. Irrigation with aluminum-containing wastewater can acidify and compact the soil, and aluminum ions can inhibit plant root growth, affecting crop yields.

[0004] Therefore, acid and aluminum removal from this type of wastewater is not only a requirement for meeting discharge standards, but also an inevitable choice for environmental protection, human health, and sustainable resource development. Acid and aluminum removal is also the most important and fundamental requirement for treating this type of wastewater.

[0005] The treatment of anodizing wastewater is currently quite complex. However, given that this wastewater is rich in acids and aluminum, it has certain recycling value. Therefore, the applicant has proposed to improve the treatment process and equipment for this wastewater in response to the current problems. Utility Model Content

[0006] The purpose of this invention is to solve the aforementioned technical problems and provide an aluminum removal and recycling system for anodizing solutions. Using this system, aluminum is removed from the anodizing waste liquid, thereby enabling the recovery and reuse of acid, and discharging a portion of the wastewater in a manner that meets environmental protection requirements.

[0007] Specifically, this utility model adopts the following technical solution: An anode oxide solution aluminum removal and recycling system includes an anode tank, a fine filter, a coarse acid tank, a high-pressure membrane device, a mother liquor transfer tank, a column chromatography aluminum removal device, and an acid-producing tank. The anode tank, which holds the anode oxide solution, is connected sequentially to the fine filter, the coarse acid tank, the mother liquor transfer tank, the column chromatography aluminum removal device, and the acid-producing tank via pipelines. The acid-producing tank is connected to the anode tank via a return acid pipeline, thus forming a recycling system. The coarse acid tank is connected to the high-pressure membrane device via a high-pressure membrane pipeline, and the outlet of the high-pressure membrane device is connected to the acid-producing tank via a pipeline.

[0008] Preferably, the mother liquor transfer tank is connected to the column chromatography aluminum removal equipment via a circulation pipeline, which includes an acid inlet pipeline from the mother liquor transfer tank to the column chromatography aluminum removal equipment and an acid reflux pipeline from the column chromatography aluminum removal equipment back to the mother liquor transfer tank.

[0009] Preferably, the column chromatography aluminum removal equipment is connected to the crude acid tank via a concentrated liquid pipeline for the recovery of the concentrated liquid.

[0010] Preferably, the column chromatography aluminum removal equipment is connected to the acid production tank via an acid production pipeline for acid recovery.

[0011] Preferably, a metering pump is installed between the anode tank and the fine filtration equipment.

[0012] Preferably, a metering pump is installed between the acid production tank and the anode tank.

[0013] Preferably, the column chromatography aluminum removal equipment is connected to a water source tank via an inlet water pipe and an outlet water pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This application utilizes high-pressure membrane and column chromatography to remove aluminum and concentrate acid from anodic oxide solutions that no longer meet the requirements, thereby enabling the waste anodic oxide solution to be recycled and reused, saving energy to a certain extent, reducing production costs, and avoiding environmental pollution caused by the discharge of harmful wastewater. This circulation system helps maintain the stability of the liquid in the anode tank, thereby improving the overall utilization efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the circulatory system of this utility model.

[0016] In the diagram: 1 Anode tank, 2 Fine filtration equipment, 3 Coarse acid tank, 4 High-pressure membrane equipment, 5 Mother liquor transfer tank, 6 Column chromatography aluminum removal equipment, 7 Acid production tank, 8 Acid return pipeline, 9 High-pressure membrane pipeline, 10 Acid inlet pipeline, 11 Acid reflux pipeline, 12 Concentrate pipeline, 13 Acid production pipeline, 14 Metering pump, 15 Water inlet pipeline, 16 Water return pipeline, 17 Water source tank. Detailed Implementation

[0017] The representative embodiments shown in the accompanying drawings will now be further refined. It should be understood that the following description is not intended to limit the embodiments to a single preferred embodiment. Rather, it is intended to cover alternatives, modifications, and equivalents that may be included within the substance and scope of the embodiments defined by the appended claims.

[0018] Our company has developed an aluminum removal and recycling system for anodizing solution. The system includes an anode tank 1, a fine filter 2, a coarse acid tank 3, a high-pressure membrane device 4, a mother liquor transfer tank 5, a column chromatography aluminum removal device 6, and an acid production tank 7. The anode tank 1, which holds the anodizing solution, is connected to the fine filter 2, the coarse acid tank 3, the mother liquor transfer tank 5, the column chromatography aluminum removal device 6, and the acid production tank 7 in sequence through pipelines. The acid production tank 7 is connected to the anode tank 1 through a return acid pipeline 8, thus forming a recycling system. The coarse acid tank 3 is connected to the high-pressure membrane device 4 through a high-pressure membrane pipeline 9, and the outlet of the high-pressure membrane device 4 is connected to the acid production tank 7 through a pipeline.

[0019] The specific details for each part are as follows: The mother liquor transfer tank 5 is connected to the column chromatography aluminum removal equipment 6 via a circulation pipeline. The circulation pipeline includes an acid inlet pipe 10 from the mother liquor transfer tank 5 to the column chromatography aluminum removal equipment 6 and an acid reflux pipe 11 returning from the column chromatography aluminum removal equipment 6 to the mother liquor transfer tank 5. The column chromatography aluminum removal equipment 6 is connected to the crude acid tank 3 via a concentrate pipe 12 for recovering the concentrate; the column chromatography aluminum removal equipment 6 is connected to the acid production tank 7 via an acid production pipe 13 for recovering the acid; the column chromatography aluminum removal equipment 6 is connected to a water source tank 17 via an inlet water pipe 15 and a return water pipe 16.

[0020] A metering pump 14 is installed between the anode tank 1 and the fine filtration equipment 2, and a metering pump 14 is installed between the acid production tank 7 and the anode tank 1.

[0021] The specific steps are as follows: The feed liquid in anode tank 1 is pumped by metering pump 14 and piped into fine filtration equipment 2, where it is filtered to obtain clean filtrate, which then flows into crude acid tank 3. After a certain time T1, when the liquid level in crude acid tank 3 reaches height H1, feeding is stopped; then, high-pressure membrane equipment 4 is activated for circulation and concentration. The filtrate in crude acid tank 3 flows through high-pressure pipeline into high-pressure membrane equipment 4 for processing, and the produced acid flows through pipeline into acid production tank 7. The returned material returns to crude acid tank 3. When the liquid level drops from H1 to H2, high-pressure membrane equipment 4 stops processing, and concentrated mother liquor is obtained in crude acid tank 3.

[0022] The mother liquor is pumped into the mother liquor transfer tank 5 through a pipeline. The mother liquor transfer tank 5 then circulates the mother liquor into the column chromatography aluminum removal equipment 6 for aluminum removal treatment. The product after column chromatography treatment is then rinsed with water provided by the water source tank 17. Wastewater meeting the requirements is discharged, and the concentrated liquid in the remaining mother liquor is returned to the crude acid tank 3. The concentrated acid produced is input into the acid production tank 7.

[0023] Regarding the column chromatography aluminum removal equipment 6, the water in the water source tank 17 is connected to the column chromatography aluminum removal equipment 6 through the inlet water pipe 15 and the return water pipe 16 to treat the mother liquor in the column chromatography equipment.

[0024] Finally, the acid production tank 7 is connected to the anode tank 1 via the metering pump 14. When the acid in the acid production tank 7 is delivered to the anode tank 1 via the metering pump 14.

[0025] By adjusting the overall parameters, the outflow and inflow of anode tank 1 are kept in balance, thus forming a complete circulation system. This circulation system can remove aluminum from the anodizing solution, thereby maintaining the recycling of the anodizing solution.

[0026] It will be obvious to those skilled in the art that, based on the above teachings, certain modifications, combinations, and variations can be made.

Claims

1. An aluminum removal and recycling system for anodizing solution, characterized in that: The system includes an anode tank (1), a fine filter (2), a crude acid tank (3), a high-pressure membrane device (4), a mother liquor transfer tank (5), a column chromatography aluminum removal device (6), and an acid production tank (7). The anode tank (1), which holds the anodic oxide solution, is connected to the fine filter (2), the crude acid tank (3), the mother liquor transfer tank (5), the column chromatography aluminum removal device (6), and the acid production tank (7) in sequence through pipelines. The acid production tank (7) is connected to the anode tank (1) through a return acid pipeline (8), thereby forming a circulation system. The crude acid tank (3) is connected to the high-pressure membrane device (4) through a high-pressure membrane pipeline (9), and the outlet of the high-pressure membrane device (4) is connected to the acid production tank (7) through a pipeline.

2. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: The mother liquor transfer tank (5) is connected to the column chromatography aluminum removal equipment (6) through a circulation pipeline. The circulation pipeline includes an acid inlet pipe (10) from the mother liquor transfer tank (5) to the column chromatography aluminum removal equipment (6) and an acid reflux pipe (11) from the column chromatography aluminum removal equipment (6) back to the mother liquor transfer tank (5).

3. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: The column chromatography aluminum removal equipment (6) is connected to the crude acid tank (3) through the concentrated liquid pipeline (12) for the recovery of concentrated liquid.

4. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: The column chromatography aluminum removal equipment (6) is connected to the acid production tank (7) through the acid production pipeline (13) for acid recovery.

5. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: A metering pump (14) is installed between the anode tank (1) and the fine filtration equipment (2).

6. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: A metering pump (14) is installed between the acid production tank (7) and the anode tank (1).

7. The aluminum removal and recycling system for anodizing solution according to claim 1, characterized in that: The column chromatography aluminum removal equipment (6) is connected to a water source tank (17) through an inlet water pipe (15) and a return water pipe (16).

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