Rapid raffinate acid extraction device and acid liquor density calculation method

Abstract

The invention discloses a rapid raffinate acid extraction device and an acid liquor density calculation method.The rapid raffinate acid extraction device comprises a vacuum pump, a container bottle and an acid suction pipe, the bottom of the acid suction pipe is connected with a plurality of acid suction branch pipes, the container bottle is connected with a first guide pipe and a second guide pipe, and the vacuum pump is connected with the first guide pipe through a first hose; and the acid suction pipe is connected with the second guide pipe through a second hose. Compared with the prior art, the container bottle disclosed by the invention can collect the extracted residual acid, so that the volume of the residual acid can be conveniently known, the weight of the residual acid can be measured by utilizing the electronic scale, and the density of the residual acid can be accurately calculated according to a density calculation formula and a temperature compensation formula. And the formation quality of the storage battery is judged according to the density of the spent acid.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to a rapid residual acid extraction device and an acid solution density calculation method. Background Art

[0002] Battery residual acid extraction is a key step in the manufacturing and recycling of lead-acid batteries. It aims to remove excess free acid after the battery formation process to maintain electrolyte balance and improve battery performance.

[0003] Traditional methods include manual suction and centrifugal acid removal. The former is inefficient and easily leads to uneven acid content in each cell. The latter uses a high-speed centrifugal barrel to remove the acid, and cooperates with a balance chamber to suppress eccentric vibration and improve the recovery rate.

[0004] Modern technology uses automated systems driven by vacuum pumps. For example, multiple suction pipes are used to simultaneously extract multiple acid tanks. In addition, intelligent detection technology (such as pressure sensor test caps) can determine whether the residual acid has been completely extracted. By monitoring the pressure changes in the gas chamber during charging, the saturation of the partition is evaluated to ensure the thoroughness of the acid extraction. In terms of environmental protection, the recovered acid reaches a purity of 90-97% after multi-stage filtration (such as acid-resistant filter bags and sedimentation tanks) to remove impurities. It can be reused in battery production or converted into chemical raw materials (such as tribasic lead sulfate). The current trend is towards automated, high-precision and green recycling. For example, the PLC-controlled charging-acid extraction linkage device can accurately control the timing of acid extraction and the liquid level during charging, significantly improving production efficiency and consistency.

[0005] However, after the existing battery residual acid extraction device extracts the residual acid, it is not easy for personnel to detect the density of the acid solution, resulting in the personnel being unable to determine whether the battery formation reaction is complete based on the density of the acid solution. Summary of the Invention

[0006] The main purpose of the present invention is to provide a rapid residual acid extraction device and an acid solution density calculation method. The container bottle can collect the extracted residual acid, so that the volume of the residual acid can be conveniently known, and the weight of the residual acid can be measured using an electronic scale, so that the density of the residual acid can be accurately calculated according to the density calculation formula and the temperature compensation formula, and the quality of the battery formed can be judged by the density of the residual acid.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A device for rapidly extracting residual acid comprises a vacuum pump, a container bottle and an acid absorption tube. The bottom of the acid absorption tube is connected to a plurality of acid absorption branches. The container bottle is connected to a first conduit and a second conduit. The vacuum pump is connected to the first conduit via a first hose, and the acid absorption tube is connected to the second conduit via a second hose.

[0009] Furthermore, a bottom height of the first conduit located in the container bottle is higher than a bottom height of the second conduit located in the container bottle.

[0010] Furthermore, a first rubber cover is provided on the top of the container bottle, and a scale is provided on the container bottle.

[0011] Furthermore, an overflow pipe is connected to the container bottle, and the height of the liquid inlet of the overflow pipe is lower than the bottom height of the first conduit located in the container bottle.

[0012] Furthermore, a one-way valve is provided on the overflow pipe.

[0013] Furthermore, an overflow bottle is included, and the overflow pipe is connected to the overflow bottle through a third conduit.

[0014] Furthermore, a second rubber cover is provided on the top of the overflow bottle.

[0015] The present invention also discloses a method for calculating the density of acid liquid, comprising the following steps:

[0016] Step 1: Insert several acid absorption branches into multiple battery acid tanks respectively, and then control the vacuum pump to work, so as to extract the residual acid of the battery into the container bottle;

[0017] Step 2: Obtain the volume of the residual acid using the scale on the container bottle, then use an electronic scale to obtain the weight of the residual acid, and then calculate the density of the acid solution according to the formula d = m / v;

[0018] Step 3: Obtain the acid temperature through an infrared thermometer, dynamically compensate the density value obtained in step 2 according to the temperature, and output the corrected density at the standard temperature.

[0019] Furthermore, in step 2, the empty weight of the container bottle is first obtained using an electronic scale, and then the empty weight of the container bottle is subtracted from the weight of the container bottle filled with residual acid to obtain the weight of the residual acid.

[0020] Furthermore, in step 3, the compensation formula for the acid density and temperature is:

[0021] ρ x =ρ t ·[1+0.000025·(xt)]-(xt)·K;

[0022] Among them, ρ x is the corrected density at x℃ (g / cm 3 ); x is standard stability; ρ t is the measured density at temperature t℃ (g / cm 3); t is the real-time temperature of the acid solution (°C); K is the temperature correction coefficient, which is determined in sections according to the density range, and 0.000025 is the expansion coefficient of the densitometer glass.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The container bottle of the present invention can collect the extracted residual acid, so that the volume of the residual acid can be conveniently known, and the weight of the residual acid can be measured using an electronic scale, so that the density of the residual acid can be accurately calculated according to the density calculation formula and the temperature compensation formula, and the quality of the battery formed can be judged by the density of the residual acid.

[0025] 2. The bottom height of the first conduit of the present invention is higher than the bottom height of the second conduit in the container bottle. Therefore, when the acid enters the container bottle 7 through the second conduit, the acid will not be absorbed by the first conduit.

[0026] 3. The overflow pipe of the present invention is connected to the overflow bottle through the third conduit. When the acid liquid level in the container bottle rises to the overflow pipe, the excess acid will be discharged to the overflow bottle through the overflow pipe, preventing the first conduit from sucking in the acid.

[0027] 4. The one-way valve of the present invention can prevent external media from entering the container bottle through the overflow pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic diagram of the overall structure of a rapid residual acid extraction device of the present invention.

[0029] In the figure: 1, acid absorption branch pipe; 2, acid absorption pipe; 3, second hose; 4, second conduit; 5, first conduit; 6, first hose; 7, container bottle; 9, vacuum pump; 10, overflow bottle; 11, third conduit; 12, one-way valve; 13, overflow pipe; 14, second rubber cover; 15, first rubber cover. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figure 1 As shown, a device for quickly extracting residual acid includes a vacuum pump 9, a container bottle 7 and an acid absorption tube 2. The bottom of the acid absorption tube 2 is connected to several acid absorption branches 1, the container bottle 7 is connected to a first conduit 5 and a second conduit 4, the vacuum pump 9 is connected to the first conduit 5 through a first hose 6, and the acid absorption tube 2 is connected to the second conduit 4 through a second hose 3.

[0032] In this embodiment, if Figure 1As shown, when the acid absorption branch pipe 1 is inserted into the battery acid tank, personnel can control the vacuum pump 9 to work. The vacuum pump 9 can extract the gas in the container bottle 7 through the first conduit 5, thereby causing the acid absorption branch pipe 1 to generate suction to suck the acid into the container bottle 7, thereby completing the extraction of the residual battery acid.

[0033] Among them, the bottom height of the first conduit 5 located in the container bottle 7 is higher than the bottom height of the second conduit 4 located in the container bottle 7. Therefore, when the acid enters the container bottle 7 through the second conduit 4, the acid will not be absorbed by the first conduit 5. In addition, an overflow pipe 13 is connected to the container bottle 7. The liquid inlet height of the overflow pipe 13 is lower than the bottom height of the first conduit 5 located in the container bottle 7. A one-way valve 12 is provided on the overflow pipe 13. It also includes an overflow bottle 10. The overflow pipe 13 is connected to the overflow bottle 10 through the third conduit 11. When the liquid level of the acid in the container bottle 7 rises to the overflow pipe 13, the excess acid will be discharged to the overflow bottle 10 through the overflow pipe 13 to prevent the first conduit 5 from inhaling the acid. In addition, the one-way valve 12 can prevent external media from entering the container bottle 7 through the overflow pipe 13.

[0034] A second rubber cover 14 is provided on the top of the overflow bottle 10 .

[0035] A first rubber cover 15 is provided on the top of the container bottle 7 , and a scale is provided on the container bottle 7 , through which the volume of the absorbed acid solution can be known.

[0036] The present invention also discloses a method for calculating the density of acid liquid, comprising the following steps:

[0037] Step 1: insert several acid absorption branches 1 into multiple battery acid tanks respectively, and then control the vacuum pump 9 to work, so as to extract the residual acid of the battery into the container bottle 7;

[0038] Step 2: Obtain the volume of the residual acid using the scale on the container bottle 7, then use an electronic scale to obtain the weight of the residual acid, and then calculate the density of the acid solution according to the formula d=m / v;

[0039] Step 3: Obtain the acid solution temperature using an infrared thermometer. Dynamically compensate the density value obtained in step 2 based on the temperature and output the corrected density at the standard temperature.

[0040] In step 2, the empty weight of the container bottle 7 is first obtained using an electronic scale, and then the empty weight of the container bottle 7 is subtracted from the weight of the container bottle 7 filled with residual acid to obtain the weight of the residual acid.

[0041] Among them, in step 3, the compensation formula for acid density and temperature is:

[0042] ρ x =ρ t·[1+0.000025(xt)]-(xt)·K;

[0043] Upper middle, ρ x is the corrected density at x℃ (g / cm 3 ); x is standard stability; ρ t is the measured density at temperature t℃ (g / cm 3 ); t is the real-time temperature of the acid solution (°C); K is the temperature correction coefficient, which is determined in sections according to the density range, and 0.000025 is the expansion coefficient of the densitometer glass.

[0044]

[0045] Table 1: Working principle of the temperature correction coefficient K for the density of sulfuric acid.

[0046] Example 2:

[0047] In this embodiment, a 12AH battery is selected, the acid absorption branch pipe 1 is inserted into the acid tank of the battery, and then the vacuum pump 9 is started to allow the acid liquid to enter the container bottle 7 through the acid absorption branch pipe 1, and then:

[0048] 1. Volume measurement: Read the volume of the acid solution V = 150 ml directly from the scale mark 7 on the container bottle.

[0049] 2. Mass calculation: Weigh the empty mass of the container bottle m1 = 300.0g and the full mass m2 = 445.5g, and the residual acid mass m = m2-m1 = 145.5g.

[0050] 3. Preliminary calculation of density: According to the formula:

[0051]

[0052] 4. Temperature compensation:

[0053] Temperature measurement: The acid temperature measured by infrared thermometer is t = 35℃;

[0054] Select the correction factor K: Measured density 0.97 g / cm 3 It belongs to the range of dilute sulfuric acid (1.151~1.200), corresponding to K=0.0007;

[0055] Dynamic compensation calculation:

[0056] ρ 20 =0.97·[1+0.000025·(20-35)]-(20-35)·0.0007

[0057] ρ 20 =0.97·0.999625+0.0105=0.97+0.0105=0.9805g / cm3 ;

[0058] 5. Result analysis: Corrected density 0.9805g / cm 3 Significantly lower than 1.25-1.30 g / cm 3 (Lead-acid battery electrolyte) is within the normal range, indicating that the sulfuric acid concentration in the residual acid is insufficient (possibly due to incomplete formation reaction or excessive dilution of acid injection). It is necessary to start secondary acid extraction and check the acid injection process.

[0059] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid residual acid extraction device, comprising a vacuum pump (9), a container bottle (7) and an acid absorption tube (2), wherein the bottom of the acid absorption tube (2) is connected to a plurality of acid absorption branches (1), characterized in that: The container bottle (7) is connected to a first conduit (5) and a second conduit (4); the vacuum pump (9) is connected to the first conduit (5) via a first hose (6); and the acid absorption tube (2) is connected to the second conduit (4) via a second hose (3).

2. A rapid residual acid extraction device according to claim 1, characterized in that: The bottom height of the first conduit (5) located in the container bottle (7) is higher than the bottom height of the second conduit (4) located in the container bottle (7).

3. A rapid residual acid extraction device according to claim 1, characterized in that: A first rubber cover (15) is provided on the top of the container bottle (7), and a scale is provided on the container bottle (7).

4. A rapid residual acid extraction device according to claim 1, characterized in that: The container bottle (7) is connected to an overflow pipe (13), and the height of the liquid inlet of the overflow pipe (13) is lower than the bottom height of the first conduit (5) located in the container bottle (7).

5. A rapid residual acid extraction device according to claim 4, characterized in that: A one-way valve (12) is provided on the overflow pipe (13).

6. A rapid residual acid extraction device according to claim 4, characterized in that: It also includes an overflow bottle (10), and the overflow pipe (13) is connected to the overflow bottle (10) through a third conduit (11).

7. A rapid residual acid extraction device according to claim 6, characterized in that: A second rubber cover (14) is provided on the top of the overflow bottle (10).

8. A method for calculating the acid density of a rapid residual acid extraction device based on any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: inserting a plurality of acid absorption branches (1) into a plurality of battery acid tanks respectively, and then controlling the vacuum pump (9) to work, thereby extracting the residual acid of the battery into the container bottle (7); Step 2: Obtain the volume of the residual acid using the scale on the container bottle (7), then use an electronic scale to obtain the weight of the residual acid, and then calculate the density of the acid solution according to the formula d=m / v; Step 3: Obtain the acid solution temperature through an infrared thermometer, dynamically compensate the density value obtained in step 2 according to the temperature, and output the corrected density at the standard temperature.

9. The method for calculating the density of acid solution according to claim 8, wherein: In step 2, the empty weight of the container bottle (7) is first obtained using an electronic scale, and then the empty weight of the container bottle (7) is subtracted from the weight of the container bottle (7) when it is filled with residual acid to obtain the weight of the residual acid.

10. The method for calculating the density of acid solution according to claim 8, wherein: In step 3, the compensation formula for acid density and temperature is: r x =ρ t ·[1+0.000025·(xt)]-(xt)·K; Among them, ρ x is the corrected density at x℃ (g / cm 3 ); x is the standard stability; ρt is the measured density at temperature t℃ (g / cm 3 ); t is the real-time temperature of the acid solution (°C); K is the temperature correction coefficient, which is determined in sections according to the density range, and 0.000025 is the expansion coefficient of the densitometer glass.

Images