Recycling device for bright aluminum foil corrosion waste acid

Abstract

The utility model discloses a recovery device of aluminum plain foil corrosion waste acid, which belongs to the technical field of waste acid recovery, and particularly comprises a main condensation tank and a pre-cooling box, the main condensation tank is fixedly connected with a first air inlet pipe, a second exhaust pipe and a first liquid collecting pipe; a second air inlet pipe and a second exhaust pipe are fixedly connected to the pre-cooling box, a steam pipeline is fixedly connected to the interior of the pre-cooling box, the air inlet end of the steam pipeline is communicated with the second air inlet pipe, and the air outlet end of the steam pipeline is communicated with the second exhaust pipe; the air outlet end of the second exhaust pipe is communicated with the air inlet end of the first air inlet pipe through a liquid tank; through the arrangement of the pre-cooling box and the steam pipeline, cooling water in the pre-cooling box cools the outer wall of the steam pipeline, acid steam flowing in the steam pipeline is cooled, and the cooled acid steam enters the main condensation tank to be condensed; therefore, the load of the cold main condensation tank is reduced, and the acid steam condensation efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of waste acid recovery technology, specifically relating to a device for recovering waste acid from aluminum foil corrosion. Background Technology

[0002] In the production of aluminum electrolytic capacitors, anodic corrosion is a critical step, in which corrosive acids (usually nitric acid or hydrochloric acid) are used to etch aluminum foil to increase its surface area, thereby improving the capacitor's capacitance. The corrosion process generates waste acid containing aluminum ions and other impurities, which needs to be recycled to reduce environmental pollution and resource waste.

[0003] The prior art discloses a Chinese utility model patent with application number 201820471450.2, which discloses a device for reducing the volume of high-concentration sulfuric acid aluminum foil pickling waste liquid, belonging to the field of waste sulfuric acid treatment equipment. This utility model's device for reducing the volume of high-concentration sulfuric acid aluminum foil pickling waste liquid utilizes a four-effect evaporation system to thermally reduce the sulfuric acid volume. The raw material liquid sequentially enters a second-effect evaporator, a third-effect evaporator, and a fourth-effect evaporator before entering a first-effect evaporator. The first-effect evaporator uses positive pressure evaporation and concentration to ensure the temperature and pressure of the secondary steam, fully utilize the thermal energy of the saturated steam, and achieve sufficient waste heat recovery. This waste sulfuric acid reduction device reduces acid gas pollution, and is simple and safe to operate, with high overall efficiency, reducing the treatment cost of high-concentration sulfuric acid aluminum foil pickling waste liquid.

[0004] The existing technology has some shortcomings: the acid vapor from the last stage enters the condenser, which is cooled and condensed into acidic water containing hydrochloric acid. The collected water is then reused in production to achieve zero emissions. However, the acid vapor is directly cooled by the condenser without pre-cooling, which results in the acid vapor being too hot, increasing the load on the condenser and reducing the condensation efficiency of the acid vapor. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a device for recovering waste acid from aluminum foil corrosion. This device features pre-cooling of the acid vapor, reducing the load on the main condenser and improving the condensation efficiency of the acid vapor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for recovering waste acid from aluminum foil corrosion, comprising a main condenser and a pre-cooling tank, wherein a first air inlet pipe, a first exhaust pipe and a first liquid collection pipe are fixedly connected to the main condenser;

[0007] The precooling tank is fixedly connected to a second air inlet pipe and a second air outlet pipe. A steam pipe is fixedly connected inside the precooling tank. The air inlet end of the steam pipe is connected to the second air inlet pipe, and the air outlet end of the steam pipe is connected to the second air outlet pipe. The air outlet end of the second air outlet pipe is connected to the air inlet end of the first air inlet pipe through a liquid tank.

[0008] Preferably, the liquid tank is fixedly connected to a third air inlet pipe, a third exhaust pipe, and a second liquid collection pipe. The air inlet end of the third air inlet pipe is connected to the second exhaust pipe, and the third exhaust pipe is connected to the first air inlet pipe.

[0009] Preferably, a condenser tube is fixedly connected inside the main condenser tank, a first inlet pipe is fixedly connected to the water inlet end of the condenser tube, and a first outlet pipe is fixedly connected to the water outlet end of the condenser tube.

[0010] Preferably, the condenser tube has a spiral structure.

[0011] Preferably, a second water inlet pipe is fixedly connected to the bottom of one side of the precooling tank, and a second water outlet pipe is fixedly connected to the top of one side of the precooling tank.

[0012] Preferably, multiple steam pipes are provided, and the multiple steam pipes are fixedly connected at intervals inside the precooling box. The air inlet end of the multiple steam pipes is connected to the second air inlet pipe, and the air outlet end of the multiple steam pipes is connected to the second air outlet pipe.

[0013] Preferably, the steam pipe includes multiple inclined pipes, with adjacent inclined pipes connected by a straight pipe, wherein the air inlet end of the uppermost inclined pipe is connected to a second air inlet pipe, and the air outlet end of the lowermost inclined pipe is connected to a second air outlet pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a pre-cooling tank and a steam pipeline to cool the outer wall of the steam pipeline with cooling water in the pre-cooling tank, thereby cooling the acid vapor flowing in the steam pipeline. The cooled acid vapor then enters the main condenser for condensation, thus reducing the load on the main condenser and improving the acid vapor condensation efficiency. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 3 This is a side view of the structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0021] In the diagram: 100, main condenser; 101, first air inlet pipe; 102, first exhaust pipe; 103, first liquid collection pipe; 104, condenser pipe; 105, first water inlet pipe; 106, first water outlet pipe; 200, pre-cooling tank; 201, second air inlet pipe; 202, second exhaust pipe; 203, steam pipe; 2031, inclined pipe; 2032, straight pipe; 204, second water inlet pipe; 205, second water outlet pipe; 300, liquid tank; 301, third air inlet pipe; 302, third exhaust pipe; 303, second liquid collection pipe. Detailed Implementation

[0022] 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. Example

[0023] Please see Figure 1-4 This embodiment provides the following technical solution: a device for recovering waste acid from aluminum foil corrosion, comprising a main condenser 100 and a pre-cooling tank 200. The main condenser 100 is fixedly connected to a first air inlet pipe 101, a first exhaust pipe 102, and a first liquid collection pipe 103. In some embodiments, the first air inlet pipe 101 is disposed on the side wall of the main condenser 100, allowing acid vapor to enter the main condenser 100 through the first air inlet pipe 101. The first exhaust pipe 102 is disposed on the top of the main condenser 100, allowing adjustment of the gas pressure inside the main condenser 100. The first liquid collection pipe 103 is disposed on the bottom of the main condenser 100, allowing the acidic water containing hydrochloric acid after condensation to be discharged from the main condenser 100.

[0024] A condenser pipe 104 is fixedly connected inside the main condenser tank 100. A first inlet pipe 105 is fixedly connected to the water inlet end of the condenser pipe 104, and a first outlet pipe 106 is fixedly connected to the water outlet end of the condenser pipe 104. Through the condenser pipe 104, the first inlet pipe 105, and the first outlet pipe 106, the cooling water can circulate inside the main condenser tank 100. During the circulation of the cooling water, it exchanges heat with the acid evaporator inside the main condenser tank 100 and further condenses into acidic water.

[0025] In some embodiments, the condenser tube 104 has a spiral structure, which can increase the contact between cooling water and acid vapor, thereby increasing the efficiency of heat exchange.

[0026] A second air inlet pipe 201 and a second air outlet pipe 202 are fixedly connected to the precooling box 200. A steam pipe 203 is fixedly connected inside the precooling box 200. The air inlet end of the steam pipe 203 is connected to the second air inlet pipe 201, and the air outlet end of the steam pipe 203 is connected to the second air outlet pipe 202. Through the second air inlet pipe 201, the second air outlet pipe 202 and the steam pipe 203, acid vapor can enter the precooling box and be precooled.

[0027] In some embodiments, the precooling tank 200 and the steam pipe 203 are configured to allow the cooling water in the precooling tank 200 to cool the outer wall of the steam pipe 203, thereby cooling the acid vapor flowing in the steam pipe 203. The cooled acid vapor then enters the main condenser 100 for condensation, thereby reducing the load on the main condenser 100 and improving the acid vapor condensation efficiency.

[0028] A second water inlet pipe 204 is fixedly connected to the bottom of one side of the precooling tank 200, and a second water outlet pipe 205 is fixedly connected to the top of one side of the precooling tank 200. Through the second water inlet pipe 204 and the second water outlet pipe 205, cooling water can enter or exit the precooling tank 200 to cool the steam pipe 203 inside the precooling tank 200.

[0029] The outlet of the second exhaust pipe 202 is connected to the inlet of the first inlet pipe 101 via a liquid tank 300. A third inlet pipe 301, a third exhaust pipe 302, and a second liquid collection pipe 303 are fixedly connected to the liquid tank 300. The inlet of the third inlet pipe 301 is connected to the second exhaust pipe 202, and the third exhaust pipe 302 is connected to the first inlet pipe 101. Through the third inlet pipe 301 and the third exhaust pipe 302, the pre-cooled acid vapor can enter the liquid tank 300 and then enter the first inlet pipe 101 through the third exhaust pipe. This also prevents the liquid generated after heat exchange from remaining in the steam pipe 203. Through the second liquid collection pipe 303, the residual liquid collected in the liquid tank 300 can be discharged from the liquid tank 300.

[0030] In some embodiments, multiple steam pipes 203 are provided, and the multiple steam pipes 203 are fixedly connected at intervals inside the precooling box 200. The air inlet end of the multiple steam pipes 203 is connected to the second air inlet pipe 201, and the air outlet end of the multiple steam pipes 203 is connected to the second exhaust pipe 202. By providing multiple steam pipes 203, the acid vapor in the second air inlet pipe 201 can simultaneously enter the interior of each steam pipe 203, increasing the efficiency of heat exchange between the cooling water and the steam pipes 203. The pre-cooled acid vapor then simultaneously gathers into the interior of the second exhaust pipe 202, facilitating the entry of the cooled acid vapor into the liquid tank 300.

[0031] The steam pipe 203 includes multiple inclined pipes 2031. Two adjacent inclined pipes 2031 are connected by a straight pipe 2032. The air inlet end of the uppermost inclined pipe 2031 is connected to the second air inlet pipe 201, and the air outlet end of the lowermost inclined pipe 2031 is connected to the second exhaust pipe 202. The inclined pipes 2031 and the straight pipe 2032 facilitate the discharge of residual liquid in the steam pipe 203, so that the residual liquid can be collected into the liquid tank 300.

[0032] The working principle of this utility model is as follows: During use, cooling water enters the pre-cooling tank 200 through the second inlet pipe 204. After the cooling water in the pre-cooling tank 200 reaches the upper limit, it is discharged from the pre-cooling tank 200 through the second outlet pipe 205, realizing the circulation of cooling water between the cooling tank and the external cooling equipment. The acid vapor that has not yet been used enters the interior of multiple steam pipes 203 through the second air inlet pipe 201. During the process of exchanging the acid vapor with the cooling water in the pre-cooling tank 200, the acid vapor in the steam pipes 203 is cooled down. The cooled acid vapor enters the liquid tank 300 through the second exhaust pipe 202.

[0033] Meanwhile, cooling water enters the condenser tube 104 through the first inlet pipe 105. After circulating, the cooling water in the condenser tube 104 is discharged from the first outlet pipe 106 and cooled by external cooling equipment, so that the cooling water circulates in the condenser tube 104. The cooled acid vapor enters the main condenser tank 100 through the third exhaust pipe 302 and the first inlet pipe 101. The cooled acid vapor comes into contact with the condenser tube 104 and undergoes further condensation to form acidic water containing hydrochloric acid.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for recovering waste acid from aluminum foil corrosion, characterized in that: It includes a main condenser (100) and a pre-cooling tank (200), wherein a first air inlet pipe (101), a first exhaust pipe (102) and a first liquid collection pipe (103) are fixedly connected to the main condenser (100). The precooling tank (200) is fixedly connected to a second air inlet pipe (201) and a second exhaust pipe (202). A steam pipe (203) is fixedly connected inside the precooling tank (200). The air inlet end of the steam pipe (203) is connected to the second air inlet pipe (201), and the air outlet end of the steam pipe (203) is connected to the second exhaust pipe (202). The air outlet end of the second exhaust pipe (202) is connected to the air inlet end of the first air inlet pipe (101) through a liquid tank (300).

2. The device for recovering waste acid from aluminum foil corrosion according to claim 1, characterized in that: The liquid tank (300) is fixedly connected to a third air inlet pipe (301), a third exhaust pipe (302), and a second liquid collection pipe (303). The air inlet end of the third air inlet pipe (301) is connected to the second exhaust pipe (202), and the third exhaust pipe (302) is connected to the first air inlet pipe (101).

3. The device for recovering waste acid from aluminum foil corrosion according to claim 1, characterized in that: A condenser tube (104) is fixedly connected inside the main condenser tank (100). A first water inlet pipe (105) is fixedly connected to the water inlet end of the condenser tube (104), and a first water outlet pipe (106) is fixedly connected to the water outlet end of the condenser tube (104).

4. The device for recovering waste acid from aluminum foil corrosion according to claim 3, characterized in that: The condenser tube (104) has a spiral structure.

5. The device for recovering waste acid from aluminum foil corrosion according to claim 1, characterized in that: A second water inlet pipe (204) is fixedly connected to the bottom of one side of the precooling tank (200), and a second water outlet pipe (205) is fixedly connected to the top of one side of the precooling tank (200).

6. The device for recovering waste acid from aluminum foil corrosion according to claim 1, characterized in that: Multiple steam pipes (203) are provided, and the multiple steam pipes (203) are fixedly connected at intervals inside the precooling box (200). The air inlet end of the multiple steam pipes (203) is connected to the second air inlet pipe (201), and the air outlet end of the multiple steam pipes (203) is connected to the second exhaust pipe (202).

7. The device for recovering waste acid from aluminum foil corrosion according to claim 6, characterized in that: The steam pipe (203) includes multiple inclined pipes (2031), and two adjacent inclined pipes (2031) are connected by a straight pipe (2032). The air inlet end of the uppermost inclined pipe (2031) is connected to the second air inlet pipe (201), and the air outlet end of the lowermost inclined pipe (2031) is connected to the second exhaust pipe (202).

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