A battery sulfuric acid production line

Abstract

The utility model relates to the field of sulfuric acid production, especially relates to a battery sulfuric acid production line, including diluter, carry out secondary mixing with desalted water after mixing concentrated sulfuric acid and battery sulfuric acid once, and output, cooler, its pipe course entrance connects the outlet of diluter, its pipe course export connects battery sulfuric acid storage tank with battery sulfuric acid inlet of diluter, its shell course is connected with cooling water. The utility model solves the problem that the graphite diluter is used in the existing battery sulfuric acid production process, and the graphite and sealing material are corroded by sulfuric acid and enter the sulfuric acid due to the nature and structure of the diluter, which affects the quality of the acid. At the same time, the traditional battery sulfuric acid production process adopts manual operation, which is complicated and not conducive to saving manpower and reducing labor cost.

Description

Technical Field

[0001] This utility model relates to the field of sulfuric acid production, and in particular to a sulfuric acid production line for storage batteries. Background Technology

[0002] Battery sulfuric acid, also known as electrolyte sulfuric acid or battery acid, has higher purity requirements compared to the preparation process of ordinary sulfuric acid. This is because any impurities can seriously affect battery performance (such as self-discharge, short circuit, capacity reduction, and plate corrosion). Therefore, the core of the production process of battery sulfuric acid lies in deep purification, which usually uses industrial sulfuric acid as raw material and goes through multiple refining steps.

[0003] In the traditional process of producing sulfuric acid for batteries, graphite diluents are used for dilution. While graphite can withstand a certain concentration of sulfuric acid corrosion, it also has limitations. For example, many types of graphite can only withstand sulfuric acid concentrations below 60%, making them unsuitable for producing concentrations above 60%. The resin sealing between graphite blocks also challenges their sulfuric acid resistance. In actual production, graphite and sealing materials are frequently corroded by sulfuric acid. Prolonged exposure to sulfuric acid can cause some graphite or sealing materials to enter the sulfuric acid, affecting its quality. Improper operation can lead to a large amount of concentrated sulfuric acid entering the diluent, potentially damaging the equipment. Furthermore, the production process of sulfuric acid for batteries releases a significant amount of heat. If not dissipated promptly, the high temperature of the sulfuric acid when it is stored in tanks can cause it to evaporate, resulting in a decrease in acid concentration. The high temperature also increases its corrosiveness, posing a challenge to the corrosion resistance of equipment and pipelines. Additionally, the traditional sulfuric acid production process for batteries is manual, cumbersome, and not conducive to saving manpower or reducing labor costs. Therefore, this utility model proposes a sulfuric acid production line for storage batteries. Utility Model Content

[0004] The utility model of this invention is to provide a sulfuric acid production line for storage batteries. It mainly solves the problem that the existing sulfuric acid production process for storage batteries uses a graphite diluent. Due to the nature and structure of the diluent, graphite and sealing materials are often corroded by sulfuric acid and enter the sulfuric acid, affecting the quality of the acid. At the same time, the traditional sulfuric acid production process for storage batteries is manually operated, which is cumbersome and not conducive to saving manpower and reducing labor costs.

[0005] This utility model proposes a sulfuric acid production line for storage batteries, comprising: The diluent mixes concentrated sulfuric acid with battery sulfuric acid in one step, then mixes it a second time with demineralized water before outputting the solution. The cooler has its tube-side inlet connected to the outlet of the diluent, and its tube-side outlet connected to the battery sulfuric acid storage tank and the battery sulfuric acid inlet of the diluent; its shell side is connected to cooling water.

[0006] Preferably, the diluent comprises: The throat chamber is tubular and extends into the chamber of the diluent; the throat chamber is provided with a concentrated sulfuric acid inlet and a battery sulfuric acid inlet; The chamber is provided with a desalination inlet, and the desalination inlet and outlet are located on opposite sides of the laryngeal chamber outlet.

[0007] Preferably, the diluent further includes: A baffle plate is disposed on the output path from the chamber to the outlet of the diluter to change the flow direction of the secondary mixed liquid and further mix it.

[0008] Preferably, there are several baffles, which are respectively disposed on the inner top surface and inner bottom surface of the chamber; the baffles disposed on the inner bottom surface and inner top surface are arranged parallel to each other and spaced apart; there are channels between adjacent baffles for secondary mixing liquid to pass through.

[0009] Preferably, it further includes: A demineralized water storage tank, connected to the diluent, is used to supply demineralized water to the diluent; A concentrated sulfuric acid storage tank, connected to the diluent, is used to supply concentrated sulfuric acid to the diluent.

[0010] Preferably, a regulating valve is provided between the diluent and the demineralized water storage tank, the concentrated sulfuric acid storage tank, and the battery sulfuric acid storage tank.

[0011] Preferably, it further includes: The transfer tank is located between the cooler and the sulfuric acid storage tank of the battery.

[0012] Preferably, both the diluent and the transfer tank are provided with U-shaped exhaust ports.

[0013] Preferably, the diluent further includes: A bellows expansion joint is located outside the chamber outlet of the diluent.

[0014] As can be seen from the above, the following beneficial effects can be obtained by applying the technical solution provided by this utility model: First, the battery sulfuric acid production line proposed in this utility model completes primary and secondary mixing in the diluent, reducing the boiling degree and heat dissipation during the mixing process, and improving the safety and stability of the mixing process. Secondly, the diluent of the battery sulfuric acid production line proposed in this utility model achieves primary and secondary mixing through the setting of throat chamber and cavity chamber. By circulating and disturbing a large amount of battery sulfuric acid, the mixing temperature is reduced in time to ensure the temperature of the mixer. Third, the diluent on the battery sulfuric acid production line proposed in this utility model is equipped with multiple baffles to ensure that the sulfuric acid and demineralized water are fully and evenly mixed, thus guaranteeing the concentration of the output battery sulfuric acid. Fourth, the battery sulfuric acid output from the cooler in the battery sulfuric acid production line proposed in this utility model is diverted to the diluent and the battery sulfuric acid storage tank, ensuring the effect of agitation and cooling and rapid mixing by the battery sulfuric acid in the diluent, while ensuring the output of battery sulfuric acid. Fifth, the acid-related equipment on the battery sulfuric acid production line proposed in this utility model is equipped with a U-shaped liquid seal to prevent air leakage and pressure equalization, ensuring that the equipment is in a closed environment and no air enters, thus improving the safety of the production line. Sixth, the battery sulfuric acid production line proposed in this utility model is equipped with a corrugated expansion joint at the outlet of the diluent, which effectively absorbs the stress generated by thermal expansion and maintains the airtightness of the diluent. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of the battery sulfuric acid production line in this embodiment of the utility model; Figure 2 This is a structural diagram of the diluent in the battery sulfuric acid production line of this utility model embodiment. Detailed Implementation

[0017] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] The existing sulfuric acid production process for storage batteries uses a graphite diluent. Due to the nature and structure of this diluent, graphite and sealing materials are often corroded by sulfuric acid and enter the sulfuric acid, affecting the quality of the acid. At the same time, the traditional sulfuric acid production process for storage batteries is manually operated, which is cumbersome and does not help to save manpower or reduce labor costs.

[0019] like Figure 1 and Figure 2As shown, in order to solve the above problems, this embodiment proposes a battery sulfuric acid production line, including a diluent 10 and a cooler 20; the diluent 10 mixes concentrated sulfuric acid and battery sulfuric acid once, and then mixes it a second time with demineralized water and outputs it; the tube side inlet of the cooler 20 is connected to the outlet of the diluent 10, the tube side outlet is connected to the battery sulfuric acid storage tank 80 and the battery sulfuric acid inlet of the diluent 10, and the shell side is connected to cooling water.

[0020] Preferably, in this embodiment, the diluent 10, cooler 20 and connecting pipes are all made of PTFE to improve corrosion resistance and ensure that the acid quality is not contaminated.

[0021] Preferably, in this embodiment, the concentrated sulfuric acid input to the diluent 10 is 98% sulfuric acid at a temperature of 40°C, the battery sulfuric acid input to the diluent 10 is also at a temperature of 40°C, the demineralized water input to the diluent 10 is at a temperature of 30°C, and the battery sulfuric acid output from the diluent 10 is at a temperature of 80°C; the cooling water connected to the shell side of the cooler 20 is 32°C supply water and 37°C return water.

[0022] Preferably, in this embodiment, the demineralized water is pure demineralized water, and the concentrated sulfuric acid is a high-quality reagent acid.

[0023] Preferably, in this embodiment, a bellows expansion joint 11 is provided at the outlet of the diluent 10 to the cooler 20 to effectively absorb the force brought by thermal expansion, ensure the overall airtightness of the diluent 10, ensure the safety of the production line, and ensure the quality of the acid.

[0024] In this embodiment, the process of primary and secondary dilution within the diluent 10 can effectively reduce heat generation and improve the mixing uniformity of the liquid during the dilution process, thereby ensuring the production quality of sulfuric acid for batteries.

[0025] More specifically, the diluter 10 includes a throat chamber 12 and a cavity 13; the throat chamber 12 is tubular and extends into the cavity 13 of the diluter 10; the throat chamber 12 is provided with a concentrated sulfuric acid inlet and a battery sulfuric acid inlet; the cavity 13 is provided with a demineralized water inlet, and the demineralized water inlet and outlet are located on opposite sides of the outlet of the throat chamber 12.

[0026] Preferably, in this embodiment, the flow direction of the liquid in the laryngeal chamber 12 is perpendicular to the flow direction of the liquid in the cavity 13. It is not limited to the flow direction of the liquid in the laryngeal chamber 12 being vertical, while the flow direction of the liquid in the cavity 13 is horizontal.

[0027] Preferably, in this embodiment, concentrated sulfuric acid and battery sulfuric acid are mixed in the throat chamber 12, so that the liquid entering the chamber 13 from the throat chamber 12 is dilute sulfuric acid. Then, through a secondary mixing of dilute sulfuric acid and demineralized water, battery sulfuric acid of appropriate concentration is prepared. Not limited to, in this embodiment, during the mixing process in the chamber 13, the throat chamber 12 continues to output battery sulfuric acid to disturb the secondary mixing.

[0028] In this embodiment, the first mixing in the throat chamber 12 of the diluent 10 allows for a stable pre-mixing with dilute sulfuric acid, unlike the violent boiling and heat release during the mixing process with water, ensuring a safe and stable mixing process. In addition, the large flow rate of 40°C battery-grade sulfuric acid can quickly remove the heat from the dilution and mixing process, preventing a rapid temperature rise. The second mixing process involves circulating and agitating the mixture with a large amount of 40°C battery-grade sulfuric acid during production, which promptly reduces the mixing temperature and prevents the mixer from overheating.

[0029] More specifically, the diluter 10 also includes a baffle 14 disposed on the output path from the chamber 13 to the outlet of the diluter 10, for changing the flow direction of the secondary mixed liquid and further mixing.

[0030] The chamber 13 comprises several baffles 14, which are respectively disposed on the inner top and inner bottom surfaces. The baffles 14 disposed on the inner top and inner bottom surfaces are arranged parallel to each other and spaced apart. There are channels between adjacent baffles 14 for secondary mixed liquids to pass through. It is not limited to six baffles 14, which are arranged in a three-fold repeating order on the inner top and inner bottom surfaces.

[0031] Preferably, in this embodiment, the demineralized water inlet of chamber 13 is located near the bottom surface of chamber 13, so the baffle plate 14 near the demineralized water inlet of chamber 13 is protruding perpendicular to the inner bottom surface of chamber 13.

[0032] Preferably, in this embodiment, the baffle plate 14 and the diluter 10 are integrally formed, which effectively improves the rigidity of the baffle plate 14 and thus maintains the function of the baffle plate 14 in further enhancing the mixing effect in the chamber 13.

[0033] Preferably, in this embodiment, the outlet of chamber 13 is located near the bottom of chamber 13, and a U-shaped exhaust port 30 is also provided on the top of the end face where the outlet is located to prevent air leakage and ensure pressure balance, thereby ensuring the airtightness of the diluter 10.

[0034] In this embodiment, after secondary mixing in chamber 13 of diluent 10, the liquid will move from the outlet of diluent 10 to cooler 20. The output path is provided with baffles 14, which can change the flow direction of the liquid multiple times and backflow for uniform mixing again. The multiple baffles 14 can realize multiple backflows for uniform mixing, thereby improving the mixing degree of dilute sulfuric acid and demineralized water.

[0035] More specifically, it also includes a transfer tank 40 located between the cooler 20 and the battery sulfuric acid storage tank 80.

[0036] Preferably, the top of the transfer tank 40 is also provided with a U-shaped exhaust port 30, which can also be used to achieve the airtightness of the transfer tank 40 and prevent air from entering, so as to ensure that the acid concentration remains stable during the transportation and transfer storage process after production is completed.

[0037] Preferably, in this embodiment, there is a significant height difference between the transfer tank 40 and the conveying channel of the cooler 20. This helps to further agitate the battery sulfuric acid in the transfer tank 40 when the battery sulfuric acid output from the cooler 20 enters the transfer tank 40, so that the battery sulfuric acid can be uniformly mixed for the last time in the transfer tank 40.

[0038] Preferably, in this embodiment, a level gauge is provided on the transfer tank 40, and the opening of the regulating valve between the transfer tank 40 and the battery sulfuric acid storage tank 80 can be adjusted by monitoring the level of the transfer tank 40. When the level is high, the opening is large, and when the level is low, the opening is small.

[0039] Preferably, this embodiment also includes a battery-operated sulfuric acid transfer pump 50, located between the transfer tank 40 and the battery-operated sulfuric acid storage tank 80 and the battery-operated sulfuric acid inlet of the diluent 10. Not limited to this, the battery-operated sulfuric acid transfer pump 50 is a magnetic pump to improve corrosion resistance and ensure that the acid quality is not contaminated.

[0040] In this embodiment, the transfer tank 40 helps to further enhance the uniformity of the fusion of the battery sulfuric acid. At the same time, the transfer can further equalize the temperature of the battery sulfuric acid, which helps to stabilize the storage environment and acidity of the battery storage tank.

[0041] More specifically, it also includes a demineralized water storage tank 60 connected to the diluent 10 for supplying demineralized water to the chamber 13 of the diluent 10; it also includes a concentrated sulfuric acid storage tank 70 connected to the diluent 10 for supplying concentrated sulfuric acid to the diluent 10; and regulating valves are provided between the diluent 10 and the demineralized water storage tank 60, the concentrated sulfuric acid storage tank 70, and the battery sulfuric acid storage tank 80.

[0042] In this embodiment, a concentration meter is also installed at the output end of the cooler 20, and flow meters are installed at the output ends of both the demineralized water storage tank 60 and the concentrated sulfuric acid storage tank 70. A pressure gauge is installed on the pipeline connecting the diluent 10 and the battery sulfuric acid storage tank 80 on the transfer pump 50. The output flow rates of the demineralized water storage tank 60 and the concentrated sulfuric acid storage tank 70 can be adjusted based on the detection values ​​of the concentration meters to ensure the final acid concentration in the battery sulfuric acid storage tank 80. Preferably, automatic control can also be achieved by adjusting the opening of the regulating valves of the corresponding pipelines through the detection parameters and monitoring the changes in the flow meters and concentration meters using a corresponding PLC controller or DCS control method.

[0043] In this embodiment, the diluent 10 is a PTFE mixing diluent 10, all acid-related equipment and pipelines are made of PTFE material, the pump is a magnetic pump, which has better corrosion resistance and no corrosion below 250℃, and will not cause the problem of sulfuric acid corrosion of equipment and pipelines and secondary pollution of the quality of sulfuric acid used in batteries.

[0044] In summary, this embodiment proposes a battery sulfuric acid production line. Through a specific diluent structure, a gradual dilution process of concentrated sulfuric acid is achieved within the diluent, reducing the heat generated during acid dilution. At the same time, multiple backflows further ensure uniform mixing, improving the mixing uniformity of the battery sulfuric acid on the production line. Furthermore, by setting up regulating valves and flow meters, the acid production process can be automated, improving the efficiency of acid production and reducing labor costs.

[0045] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A storage battery sulfuric acid production line, characterized in that, include: The diluent mixes concentrated sulfuric acid with battery sulfuric acid in one step, then mixes it a second time with demineralized water before outputting the solution. The cooler has its tube-side inlet connected to the outlet of the diluent, and its tube-side outlet connected to the battery sulfuric acid storage tank and the battery sulfuric acid inlet of the diluent; its shell side is connected to cooling water. The diluter includes, The throat chamber is tubular and extends into the chamber of the diluent; the throat chamber is provided with a concentrated sulfuric acid inlet and a battery sulfuric acid inlet; The chamber is provided with a desalination inlet, and the desalination inlet and outlet are located on opposite sides of the laryngeal chamber outlet.

2. The battery sulfuric acid production line according to claim 1, characterized in that, The diluter also includes: A baffle plate is disposed on the output path from the chamber to the outlet of the diluter to change the flow direction of the secondary mixed liquid and further mix it.

3. The battery sulfuric acid production line according to claim 2, characterized in that: The number of baffles is several, and they are respectively disposed on the inner top surface and inner bottom surface of the chamber; the baffles disposed on the inner bottom surface and inner top surface are arranged parallel to each other and are spaced apart; there are channels between adjacent baffles for secondary mixed liquids to pass through.

4. A storage battery sulfuric acid production line according to any one of claims 1 to 3, characterized in that, Also includes: A demineralized water storage tank, connected to the diluent, is used to supply demineralized water to the diluent; A concentrated sulfuric acid storage tank, connected to the diluent, is used to supply concentrated sulfuric acid to the diluent.

5. A storage battery sulfuric acid production line according to claim 4, characterized in that: A regulating valve is installed between the diluent and the demineralized water storage tank, the concentrated sulfuric acid storage tank, and the battery sulfuric acid storage tank.

6. A storage battery sulfuric acid production line according to claim 5, characterized in that, Also includes: The transfer tank is located between the cooler and the sulfuric acid storage tank of the battery.

7. A storage battery sulfuric acid production line according to claim 6, characterized in that: Both the diluent and the transfer tank are equipped with U-shaped exhaust ports.

8. A storage battery sulfuric acid production line according to claim 7, characterized in that, The diluter also includes: A bellows expansion joint is located outside the chamber outlet of the diluent.

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