Acid liquor recycling system

Abstract

The utility model discloses an acid liquor recycling system. Belongs to the technical field of lead-acid storage batteries. The device mainly solves the problem that the existing device cannot directly use the sulfuric acid which is collected and poured out in the production field for acidification. The device is mainly characterized by comprising an acid liquor collection pool, an acid liquor delivery pump, an acid preparation tank, an acid liquor dilution tank, a heat exchanger, an acid storage tank and acid liquor pipelines connected among the above parts, the acid liquor delivery pump, the acid liquor dilution tank and the heat exchanger are sequentially connected through an acid liquor pipeline, and a second valve is arranged between the acid liquor delivery pump and the acid liquor dilution tank; and a third valve is arranged between the acid liquor delivery pump and the acid preparation tank. The device has the characteristics that a part of recycled acid liquor can be diluted and then used for acidification on the spot, and the other part of surplus recycled acid liquor and a sulfuric acid solution with higher concentration are prepared into acid liquor with proper concentration to be used for adjusting the liquid level of a battery or used for mixing paste and adding acid; the method is mainly used for in-situ recovery and cyclic utilization of the formed low-density sulfuric acid solution.

Description

Technical Field

[0001] This utility model belongs to the field of lead-acid battery technology, specifically relating to an acid recycling system. Background Technology

[0002] The internal formation of lead-acid batteries includes two process paths: the first is a single-stage acid addition formation process, and the second is an acid addition formation + acid dumping + acid mixing process. For the "acid addition formation + acid dumping + acid mixing" process, the acid dumped from the battery after formation is generally recycled. The conventional method is to collect the sulfuric acid dumped during formation at the production site and then transport it to the acid mixing station via acid transfer pumps and pipelines. At the acid mixing station, the recycled acid is mixed to the specified density in the mixing tanks. Then, the qualified mixed acid is transported to the acid storage tank. After the acid temperature in the storage tank drops to the range required by the process, it can be transported to the formation site for use as sulfuric acid in the acid addition formation.

[0003] The drawback of the conventional method is that the sulfuric acid collected and poured out during the formation process cannot be directly used for acid formation. This results in low recycling efficiency of the sulfuric acid solution poured out from the battery after formation, the need for more acid mixing tanks at the acid mixing station, relatively low production efficiency, and relatively high production costs. Utility Model Content

[0004] The purpose of this invention is to provide an acid recycling system that improves the recycling efficiency of the sulfuric acid solution poured out of the battery after formation, reduces the demand for acid tanks at the acid mixing station, and ultimately helps to improve production efficiency and reduce production costs.

[0005] The technical solution of this utility model is: an acid recycling system for on-site recovery and recycling of low-density sulfuric acid solution after formation, comprising an acid collection tank, an acid delivery pump, an acid mixing tank, and acid pipelines connecting them, characterized in that: it further includes an acid dilution tank, a heat exchanger, and an acid storage tank; wherein, the acid delivery pump, the acid dilution tank, and the heat exchanger are sequentially connected by acid pipelines, and a second valve is provided between the acid delivery pump and the acid dilution tank; a third valve is provided between the acid delivery pump and the acid mixing tank; the acid mixing tank and the acid storage tank are connected by acid pipelines.

[0006] In the technical solution of this utility model, a first valve is provided between the acid collection tank and the acid delivery pump.

[0007] In the technical solution of this utility model, the acid collection tank, acid transfer pump, acid dilution tank and heat exchanger are located inside or around the battery production formation workshop; the acid mixing tank and acid storage tank are located at the acid mixing station.

[0008] In the technical solution of this utility model, the acid dilution tank and the acid collection pool are installed nearby; the acid mixing tank and the acid storage tank are installed nearby.

[0009] In the technical solution of this utility model, the acid mixing tank is installed close to the concentrated acid tank of the acid mixing station and is connected to the concentrated acid tank through an acid pipeline.

[0010] In the technical solution of this utility model, the heat exchanger is connected to the acid adding machine through an acid liquid pipeline; the acid storage tank is connected to the paste adding equipment or the liquid level adjustment station before the battery formation line through an acid liquid pipeline.

[0011] The acid dilution tank described in this utility model's technical solution is equipped with a pure water pipeline and connected to a pure water filling device.

[0012] This invention employs an acid recycling system comprising an acid collection tank, an acid delivery pump, an acid mixing tank, an acid dilution tank, a heat exchanger, an acid storage tank, and connecting acid pipelines. This system is used for the on-site recovery and recycling of low-density sulfuric acid solution after it has been formed. The acid delivery pump, acid dilution tank, and heat exchanger are sequentially connected via acid pipelines. A second valve is installed between the acid delivery pump and the acid dilution tank, and a third valve is installed between the acid delivery pump and the acid mixing tank. The acid mixing tank and the acid storage tank are connected via acid pipelines. Therefore, during use, the low-density sulfuric acid solution can be recycled... The acid (density 1.06g / ml-1.14g / ml) is collected on-site and pumped to an acid dilution tank. After dilution with pure water (density 1.01g / ml-1.05g / ml) and cooling by a heat exchanger, it is directly used on-site for acidification. If on-site acidification cannot completely consume the recovered acid, the excess recovered acid is pumped to an acid mixing tank. In the acid mixing tank, the recovered acid is mixed with a high-concentration sulfuric acid solution to prepare an acid solution of appropriate concentration, which is then transported to the corresponding workstation for battery fluid level adjustment or for adding acid to battery paste.

[0013] This invention features the ability to dilute a portion of the recovered acid solution for on-site acidification, and to prepare a suitable concentration of acid solution by mixing the surplus recovered acid solution with a higher concentration sulfuric acid solution for use in adjusting battery electrolyte levels or adding acid to battery paste, thereby improving production efficiency and reducing production costs. It is mainly used for on-site recycling of low-density sulfuric acid solution after formation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention.

[0015] Attached reference numerals: 1-Acid collection tank; 2-Acid transfer pump; 3-Acid dilution tank; 4-Heat exchanger; 5-Acid mixing tank; 6-Acid storage tank; 7-First valve; 8-Second valve; 9-Third valve. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1 This utility model provides an acid recycling system, which includes an acid collection tank 1, an acid transfer pump 2, an acid dilution tank 3, a heat exchanger 4, an acid mixing tank 5, an acid storage tank 6, a first valve 7, a second valve 8, a third valve 9, and acid pipelines connecting them, for on-site recycling of low-density sulfuric acid solution after formation.

[0018] Acid collection tank 1, acid dilution tank 3, and heat exchanger 4 are located inside or around the battery production formation workshop. Acid dilution tank 3 is installed close to acid collection tank 1, and heat exchanger 4 is installed immediately after acid dilution tank 3. Acid transfer pump 2, acid dilution tank 3, and heat exchanger 4 are connected sequentially by acid pipelines. A second valve 8 is installed between acid transfer pump 2 and acid dilution tank 3, and a first valve 7 is installed between acid collection tank 1 and acid transfer pump 2. Acid dilution tank 3 is equipped with a pure water pipeline connected to pure water filling equipment. Heat exchanger 4 is connected to an acid filling machine via an acid pipeline.

[0019] Acid mixing tank 5 and acid storage tank 6 are located in the acid mixing station, with acid mixing tank 5 installed close to the concentrated acid tank of the station. Acid transfer pump 2, acid mixing tank 5, and acid storage tank 6 are connected sequentially via acid pipelines. Acid mixing tank 5 and acid storage tank 6 are also connected via acid pipelines, and a third valve 9 is installed between acid transfer pump 2 and acid mixing tank 5. Acid storage tank 6 is connected via acid pipelines to the paste adding equipment or to the corresponding workstation where the liquid level needs to be adjusted.

[0020] Open the first valve 7 and the second valve 8 on the pipeline between acid collection tank 1 and acid dilution tank 3, and close the third valve 9 on the pipeline between acid transfer pump 2 and acid mixing tank 5. Collect the low-density (1.06g / ml-1.14g / ml) sulfuric acid solution poured out of the battery into acid collection tank 1. Turn on acid transfer pump 2 to transfer the low-density sulfuric acid solution in acid collection tank 1 to acid dilution tank 3. Add pure water to dilute the sulfuric acid solution in dilution tank 3 (dilution density to 1.01g / ml-1.05g / ml). Then, the diluted sulfuric acid solution is cooled to 5-25℃ by heat exchanger 4 and finally delivered to the acid adding machine for battery acid addition.

[0021] If this method cannot completely consume the recovered low-density acid, close the second valve 8 on the pipeline between acid transfer pump 2 and dilution tank 3, open the third valve 9 on the pipeline between acid transfer pump 2 and acid mixing tank 5, and turn on acid transfer pump 2 to transport the recovered acid to acid mixing tank 5. After the recovered low-density sulfuric acid solution is pumped into acid mixing tank 5, add an appropriate amount of concentrated sulfuric acid to acid mixing tank 5 to adjust the sulfuric acid solution concentration to 1.24g / ml-1.40g / ml, and then transport it to acid storage tank 6 for storage. When the acid temperature drops below 35℃, transport the acid in acid storage tank 6 to the corresponding workstation for battery fluid level adjustment or for adding acid to paste.

[0022] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. An acid recycling system for on-site recovery and recycling of low-density sulfuric acid solution after formation, comprising an acid collection tank (1), an acid transfer pump (2), an acid mixing tank (5), and acid pipelines connecting them, characterized in that: It also includes an acid dilution tank (3), a heat exchanger (4), and an acid storage tank (6); wherein the acid delivery pump (2), the acid dilution tank (3), and the heat exchanger (4) are connected in sequence by an acid pipeline, and a second valve (8) is provided between the acid delivery pump (2) and the acid dilution tank (3); a third valve (9) is provided between the acid delivery pump (2) and the acid mixing tank (5); the acid mixing tank (5) and the acid storage tank (6) are connected by an acid pipeline.

2. The acid recycling system according to claim 1, characterized in that: A first valve (7) is provided between the acid collection tank (1) and the acid delivery pump (2).

3. An acid recycling system according to claim 1 or 2, characterized in that: The acid collection tank (1), acid transfer pump (2), acid dilution tank (3) and heat exchanger (4) are located inside or around the battery production formation workshop; the acid mixing tank (5) and acid storage tank (6) are located at the acid mixing station.

4. The acid recycling system according to claim 3, characterized in that: The acid dilution tank (3) and the acid collection tank (1) are installed close to each other; the acid mixing tank (5) and the acid storage tank (6) are installed close to each other.

5. An acid recycling system according to claim 4, characterized in that: The acid mixing tank (5) is installed near the concentrated acid tank of the acid mixing station and is connected to the concentrated acid tank through an acid pipeline.

6. An acid recycling system according to any one of claims 1-2 and 4-5, characterized in that: The heat exchanger (4) is connected to the acid adding machine through an acid pipe; the acid storage tank (6) is connected to the paste adding equipment or the liquid level adjustment station before the battery formation line through an acid pipe.

7. An acid recycling system according to any one of claims 1-2 and 4-5, characterized in that: The acid dilution tank (3) is equipped with a pure water pipeline and is connected to a pure water filling device.

8. An acid recycling system according to claim 6, characterized in that: The acid dilution tank (3) is equipped with a pure water pipeline and is connected to a pure water filling device.

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