Leached acid recovery system based on lead-acid storage battery

Abstract

The invention relates to a leached acid recovery system based on a lead-acid storage battery, which comprises a conveyor for recovering and conveying a mixed solution of lead paste and an acid solution, a separation unit for separating the lead paste from the acid solution, and a collection unit for collecting the acid solution output by the separation unit, the collecting unit is used for collecting the liquid level change condition in each collecting box and the flow of the mixed liquid output by the conveyor; the central control unit is used for judging whether the separation of the lead plaster and the acid liquid meets the standard or not on the basis of the liquid level change condition, collected by the collecting unit, of the first collecting box; the problems that in the prior art, lead-acid storage battery residual paste recycling automation is low, and lead paste resources are seriously wasted are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste recycling, and particularly to an acid leaching recovery system based on lead-acid batteries. Background Art

[0002] During the manufacturing process of lead-acid batteries, lead paste will be lost and enter the acid leaching solution during the plate coating process of the electrode plate. The common treatment method in the industry is to let the acid solution settle naturally. After a period of time, manual cleaning and secondary utilization are carried out. However, the sedimentation process requires a separate large-capacity container, which occupies a large space and requires a long sedimentation time. Moreover, the subsequent manual cleaning is cumbersome, and it will also cause environmental pollution and waste of lead paste resources. Therefore, designing an automatic lead paste recovery device can save floor space and achieve the effects of energy conservation, consumption reduction, and pollution reduction.

[0003] Chinese Patent Application Publication No.: CN103560303B discloses a method for recovering residual paste by rolling water and acid on the lead-acid battery smear plate, including the following steps: coating lead paste on a lead grid, and then passing the lead grid through a first pressing roller to compress and flatten the fluffy lead paste on its surface, while extruding the excess lead paste; performing a rolling water operation on the lead grid to wash and collect the extruded residual paste through the action of water flow; continuing to extrude the lead grid and performing a rolling acid operation, and separately collecting the excess lead paste extruded at this time.

[0004] It can be seen that the method for recovering residual paste by rolling water and acid on the lead-acid battery smear plate has the following problems: manual operation is still required during the recovery process of the residual paste of lead-acid batteries, and waste of lead paste will still occur during the recovery process. The acid leaching solution used for plate coating of the electrode plate cannot be reused, and the problem of resource waste is relatively serious. Summary of the Invention

[0005] Therefore, the present invention provides an acid leaching recovery system based on lead-acid batteries to overcome the problems of low automation in the recovery of residual paste of lead-acid batteries and serious waste of lead paste resources in the prior art.

[0006] To achieve the above object, the present invention provides an acid leaching recovery system based on lead-acid batteries, including:

[0007] A conveyor for recovering and transporting the mixture of lead paste and acid solution.

[0008] A separation unit is provided at the output end of the conveyor. It includes a conveyor belt for receiving the mixed liquid, a soft rubber pressing roller provided on the conveyor belt for squeezing and filtering the mixed liquid, and a scraping plate provided on the conveyor belt for scraping the lead paste after solid-liquid separation on the conveyor belt; capillary pores for permeating and filtering the mixed liquid are provided on the step belt material of the conveyor belt, and the soft rubber pressing roller is arranged on the side of the scraping plate close to the conveyor and is connected to the conveyor belt through a telescopic device;

[0009] A collection unit is provided below the conveyor belt for collecting the acid liquid output by the separation unit. It includes a first collection box, a second collection box, and a third collection box arranged in parallel. The heights of the collection boxes decrease in sequence, and the height of the first collection box is the largest;

[0010] An acquisition unit includes a liquid level sensor respectively arranged in each collection box for detecting the liquid level change in each collection box and a flow sensor arranged in the conveyor for detecting the flow rate of the mixed liquid output by the conveyor;

[0011] A central control unit is respectively connected to the corresponding components in the separation unit and the acquisition unit. It is used to determine the distance between the soft rubber pressing roller and the conveyor belt or the slope of the conveyor belt when it is determined that the separation of the lead paste and the acid liquid does not meet the standard based on the liquid level change of the first collection box collected by the acquisition unit; the central control unit is also used to determine a preset liquid level change amount used as a determination reference based on the mixed liquid delivery volume of the conveyor.

[0012] Further, the liquid level change of the first collection box is the difference between the liquid level in the first collection box measured by the corresponding liquid level sensor at the current detection time node and the liquid level in the first collection box measured at the previous detection time node; the liquid level change of the second collection box is the difference between the liquid level in the second collection box measured by the corresponding liquid level sensor at the current detection time node and the liquid level in the second collection box measured at the previous detection time node;

[0013] The central control unit determines the distance between the soft rubber pressing roller and the conveyor belt according to the obtained liquid level change of the first collection box, or determines the slope of the conveyor belt according to the obtained liquid level change of the first collection box and the liquid level change of the second collection box.

[0014] Further, the central control unit has several distance adjustment methods for the distance between the soft rubber pressing roller and the conveyor belt based on the liquid level change of the first collection box, and the adjustment amplitude for the distance under each distance adjustment method is different.

[0015] Further, the central control unit is provided with several speed adjustment methods for the conveyor belt speed based on the distance between the soft rubber pressure roller and the conveyor belt, and the adjustment ranges of the conveyor belt speed under each speed adjustment method are different.

[0016] Further, the central control unit determines the conveyor belt slope based on the ratio of the liquid level change in the first collection box to the liquid level change in the second collection box obtained.

[0017] Further, the central control unit is provided with several slope adjustment methods for the conveyor belt slope based on the ratio of the liquid level change in the first collection box to the liquid level change in the second collection box obtained, and the adjustment ranges of the conveyor belt slope under each slope adjustment method are different.

[0018] Further, the central control unit determines the determination criterion for the liquid level change of the corresponding first collection box according to the volume ratio obtained from the flow rate of the mixed liquid output by the conveyor and the liquid level change of the first collection box;

[0019] The volume ratio is the ratio of the volume of the mixed liquid output by the conveyor within a preset time period obtained by the central control unit according to the flow rate of the mixed liquid to the volume of the acid liquid received by the first collection box within the same time interval obtained according to the liquid level change of the first collection box.

[0020] Further, the central control unit is provided with several correction methods for the determination criterion of the liquid level change of the first collection box based on the volume ratio of the flow rate of the mixed liquid output by the conveyor and the liquid level change of the first collection box, and the determination criteria obtained under each correction method are different.

[0021] Further, when the central control unit determines that the liquid level change of the first collection box does not meet the standard based on the re-determined determination criterion for the liquid level change of the first collection box, it determines the distance between the soft rubber pressure roller and the conveyor belt based on the liquid level change in the first collection box, or determines the slope of the conveyor belt according to the liquid level change in the first collection box and the liquid level change in the second collection box obtained.

[0022] Further, when the difference between the liquid level height of the first collection box and the difference in the output volume of the mixed liquid does not meet the preset difference standard in the central control unit, the central control unit determines several angle adjustment methods for the angle of the conveyor belt based on the liquid level change of the first collection box, and the reduction amplitudes of the inclination angles of the conveyor belt under each angle adjustment method are different.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows. In the present invention, the separation unit performs gravity filtration, permeation filtration, and extrusion filtration on the mixed liquid through the conveyor belt with a certain slope, capillary pores, and the soft rubber pressure roller, respectively, so that the acid liquid and the lead paste are completely separated, improving the recovery rates of the lead paste and the acid liquid, reducing the risks of resource waste and environmental pollution, achieving the purpose of automatic recovery, and saving labor costs.

[0024] Further, when the central control unit determines that the separation of the lead paste and the acid liquid does not meet the standard based on the liquid level change of the first collection box collected by the collection unit, it determines the distance between the soft rubber pressure roller and the conveyor belt or the slope of the conveyor belt, and also determines the preset liquid level change amount used as the determination reference based on the conveying amount of the mixed liquid of the conveyor, further improving the recovery rates of the lead paste and the acid liquid and reducing the risks of resource waste and environmental pollution.

[0025] Further, the central control unit corrects the determination reference of the liquid level change of the first collection box according to the volume ratio obtained based on the flow rate of the mixed liquid output by the conveyor and the liquid level change of the first collection box, further improving the recovery rates of the lead paste and the acid liquid and reducing the risks of resource waste and environmental pollution.

[0026] Further, the central control unit re-determines whether the lead paste recovery meets the standard based on the re-determined determination reference of the liquid level change of the first collection box, and determines the distance between the soft rubber pressure roller and the conveyor belt based on the liquid level change in the first collection box, or determines the slope of the conveyor belt according to the liquid level change in the first collection box and the liquid level change in the second collection box obtained, further improving the recovery rates of the lead paste and the acid liquid and reducing the risks of resource waste and environmental pollution.

[0027] Further, when the difference between the liquid level height of the first collection box and the difference in the output amount of the mixed liquid does not meet the preset standard in the central control unit, the central control unit determines the angle of the conveyor belt based on the liquid level change of the first collection box, further improving the recovery rates of the lead paste and the acid liquid and reducing the risks of resource waste and environmental pollution. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the acid drenching recovery system based on lead-acid batteries according to the present invention;

[0029] Figure 2 It is a structural block diagram of the acid drenching recovery system based on lead-acid batteries according to the present invention;

[0030] Figure 3 It is a determination flowchart of the liquid level change of the first collection box by the central control unit according to the present invention;

[0031] Figure 4 This is a flowchart for the central control unit of the present invention to determine the ratio of the liquid level change of the second collection box to that of the first collection box.

[0032] In order to make the objectives and advantages of the present invention more clearly understood, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The following further elaborates on the above and other technical features and advantages of the present invention with reference to the accompanying drawings.

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0035] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0036] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0037] Please refer to Figure 1 and Figure 2As shown, it is a schematic structural diagram and a structural block diagram of the acid drenching recovery system based on lead-acid batteries according to the present invention, including a conveyor 1, a separation unit (not shown in the figure), a collection unit (not shown in the figure), a collection unit (not shown in the figure), and a central control unit (not shown in the figure); the conveyor 1 is used to recover and convey the mixed liquid of lead paste and acid solution; the separation unit is arranged at the output end of the conveyor 1 and includes a conveyor belt 2 for receiving the mixed liquid, a soft rubber pressing roller 6 arranged on the conveyor belt 2 to squeeze and filter the mixed liquid, and a scraping plate 7 arranged on the conveyor belt 2 to scrape the lead paste after solid-liquid separation on the conveyor belt 2; the step belt material of the conveyor belt 2 is provided with capillary pores for permeating and filtering the mixed liquid, and the soft rubber pressing roller 6 is arranged on the side of the scraping plate 7 close to the conveyor 1 and is connected to the conveyor belt 2 through a telescopic device; the collection unit is arranged below the conveyor belt 2 and is used to collect the acid solution output by the separation unit, including a first collection box 3, a second collection box 4, and a third collection box 5 arranged in parallel, the height of each collection box decreases in sequence and the height of the first collection box 3 is the largest; the collection unit includes a liquid level sensor respectively arranged in each collection box to detect the liquid level change of each collection box and a flow sensor arranged in the conveyor 1 to detect the flow rate of the mixed liquid output by the conveyor 1; the central control unit is respectively connected to the corresponding components in the separation unit and the collection unit, and is used to determine the distance between the soft rubber pressing roller 6 and the conveyor belt 2 or the slope of the conveyor belt 2 when it is determined that the separation of lead paste and acid solution does not meet the standard based on the liquid level change of the first collection box 3 collected by the collection unit; the central control unit is also used to determine a preset liquid level change amount used as a judgment reference based on the conveying amount of the mixed liquid of the conveyor 1;

[0038] Specifically, during the manufacturing process of lead-acid batteries, the conveyor 1 collects the waste liquid generated during the plate coating and acid drenching process of the electrode plates and conveys it to the conveyor belt 2 of the separation unit. The conveyor belt 2 has a certain slope. The mixed liquid first flows downward along the slope under the action of gravity on the conveyor belt 2, and then the conveyor belt 2 moves upward. The capillary pores permeate and filter the acid solution that has not fallen. Then, the soft rubber pressing roller 6 squeezes the lead paste that has undergone gravity filtration and permeation filtration to separate the remaining acid solution; the acid solution separated by gravity filtration falls into the first collection box 3, the acid solution separated by permeation filtration falls into the second collection box 4, the acid solution separated by extrusion filtration falls into the third collection box 5, and the lead paste is separated from the conveyor belt 2 by scraping with the scraping plate 7 and falls into the material receiving hopper 8. The collection unit collects the liquid level changes in each collection box, and the central control unit determines the distance between the soft rubber pressing roller 6 and the conveyor belt 2 or the slope of the conveyor belt 2 according to the data collected by the collection unit.

[0039] Please refer to Figure 3As shown, the central control unit of the present invention determines whether the separation of lead paste and acid solution is qualified according to the difference between the liquid level in the first collection box 3 measured at the current detection time node by the liquid level sensor in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node, where:

[0040] The first determination method is that the central control unit determines that the separation of the lead paste and the acid solution does not meet the standard, and the central control unit determines the adjustment method for the distance between the soft rubber pressure roller 6 and the conveyor belt 2 based on the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node; the first determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is less than or equal to the first preset liquid level difference standard preset in the central control unit, and the first preset liquid level difference standard S1 = 10 cm is set;

[0041] The second determination method is that the central control unit preliminarily determines that the separation of the lead paste and the acid solution meets the standard, and the central control unit determines the slope of the conveyor belt 2 according to the ratio of the liquid level change situation in the first collection box 3 to the liquid level change situation in the second collection box 4 obtained; the second determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the first preset liquid level difference standard preset in the central control unit and less than or equal to the second preset liquid level difference standard, and the second preset liquid level difference standard S2 = 20 cm is set;

[0042] The third determination method is that the central control unit determines that the separation of the lead paste and the acid solution meets the standard and determines that the lead paste recovery process is qualified; the third determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the second preset liquid level difference standard preset in the central control unit and less than or equal to the third preset liquid level difference standard, and the second preset liquid level difference standard S3 = 30 cm is set;

[0043] The fourth determination method is that the central control unit preliminarily determines that the separation of the lead paste and the acid solution does not meet the standard, and the central control unit determines whether to correct the determination reference of the liquid level change situation in the first collection box 3 based on the volume ratio obtained from the flow rate of the mixed liquid output by the conveyor 1 and the liquid level change situation in the first collection box 3; the fourth determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the third preset liquid level difference standard preset in the central control unit.

[0044] Please continue to refer to Figures 1 to 3As shown, when the central control unit determines that the too-low difference meets the first determination method, the central control unit sets a spacing adjustment method for the spacing between the soft rubber roller 6 and the conveyor belt 2 based on the liquid level change of the first collection box 3, where:

[0045] The first spacing adjustment method is that when the central control unit determines that the too-low difference of the first collection box 3 meets the preset too-low difference standard, the spacing between the soft rubber roller 6 and the conveyor belt 2 is reduced by 0.2 cm on the basis of the preset initial spacing; the first spacing adjustment method meets the condition that the too-low difference is greater than or equal to the first preset too-low difference standard, and the first preset too-low difference standard S11 is set to 8 cm, and the preset initial spacing is 2 cm; the too-low difference refers to the liquid level change in the first collection box 3 when the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is lower than the first preset liquid level difference standard preset in the central control unit;

[0046] The second spacing adjustment method is that when the central control unit preliminarily determines that the too-low difference of the first collection box 3 does not meet the preset initial spacing standard, the spacing between the soft rubber roller 6 and the conveyor belt 2 is reduced by 0.5 cm on the basis of the preset initial spacing; the second spacing adjustment method meets the condition that the too-low difference is less than the first preset too-low difference standard and greater than or equal to the second preset too-low difference standard, and the second preset too-low difference standard S12 is set to 6 cm;

[0047] The third spacing adjustment method is that when the central control unit determines that the too-low difference of the first collection box 3 does not meet the preset initial spacing standard, the spacing between the soft rubber roller 6 and the conveyor belt 2 is reduced by 0.8 cm on the basis of the preset initial spacing; the third spacing adjustment method meets the condition that the too-low difference is less than the second preset too-low difference standard.

[0048] Please continue to refer to Figures 1 to 3 As shown, the central control unit sets a speed adjustment method for the moving speed of the conveyor belt 2 based on the spacing between the soft rubber roller 6 and the conveyor belt 2, where:

[0049] The first speed adjustment method is that when the central control unit determines that the spacing between the soft rubber roller 6 and the conveyor belt 2 meets the preset spacing standard, the moving speed of the conveyor belt 2 is reduced by 10% on the basis of the preset initial speed; the first speed adjustment method meets the condition that the spacing between the soft rubber roller 6 and the conveyor belt 2 passes through the first spacing adjustment method, and the preset initial speed is set to 0.3 m / s;

[0050] The second preset adjustment method is that when the central control unit preliminarily determines that the distance between the soft rubber pressing roller 6 and the conveyor belt 2 does not meet the preset distance standard, the moving speed of the conveyor belt 2 is reduced by 15% based on the preset initial moving speed; the second moving speed adjustment method satisfies that the distance between the soft rubber pressing roller 6 and the conveyor belt 2 passes through the second distance adjustment method.

[0051] The third preset adjustment method is that when the central control unit determines that the distance between the soft rubber pressing roller 6 and the conveyor belt 2 does not meet the preset distance standard, the moving speed of the conveyor belt 2 is reduced by 20% based on the preset initial moving speed; the third moving speed adjustment method satisfies that the distance between the soft rubber pressing roller 6 and the conveyor belt 2 passes through the third distance adjustment method.

[0052] Please refer to Figure 4 As shown, it is a flowchart for the central control unit of the present invention to determine the ratio of the liquid level change of the second collection box 4 to the liquid level change of the first collection box 3; when the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node satisfies the second determination method, the central control unit makes a secondary determination on whether the separation of the lead paste and the acid solution meets the standard based on the ratio of the liquid level change of the second collection box 4 to the liquid level change of the first collection box 3, where:

[0053] The first ratio determination method is that if the ratio of the liquid level changes meets the preset liquid level ratio standard in the central control unit, the central control unit determines that the separation of the lead paste and the acid solution is qualified; the first ratio determination method satisfies that the liquid level ratio is less than the preset liquid level ratio standard in the central control unit, and the preset liquid level ratio standard is set to 0.75.

[0054] The second ratio determination method is that if the ratio of the liquid level differences does not meet the preset liquid level ratio standard in the central control unit, the central control unit determines that the separation of the lead paste and the acid solution is unqualified, and the central control unit adjusts the slope of the conveyor belt 2; the second ratio determination method satisfies that the liquid level ratio is greater than or equal to the preset liquid level ratio standard in the central control unit.

[0055] Please continue to refer to Figures 1 to 4 As shown, the central control unit has a slope adjustment method for the slope of the conveyor belt 2 based on the ratio of the liquid level change of the second collection box 4 to the liquid level change of the first collection box 3 obtained, where:

[0056] The first slope adjustment method is that the ratio of the liquid level changes is equal to 1, that is, the liquid level change of the second collection box 4 is equal to the liquid level change of the first collection box 3, and the central control unit adjusts the slope of the conveyor belt 2 to 0.3.

[0057] The second slope adjustment method is that the ratio of the liquid level change situation is less than 1 and greater than or equal to 0.85, and the central control unit adjusts the slope of the conveyor belt 2 to 0.2;

[0058] The third slope adjustment method is that the ratio of the liquid level change situation is greater than or equal to 0.85 and less than or equal to 0.75, and the central control unit adjusts the slope of the conveyor belt 2 to 0.15.

[0059] Please continue to refer to Figures 1 to 4 As shown, when the difference between the liquid level in the first collection box 3 determined by the central control unit and the liquid level in the first collection box 3 measured at the previous detection time node satisfies the fourth determination method, the central control unit determines whether the determination reference for the liquid level change situation of the first collection box 3 needs to be corrected based on the volume ratio obtained from the flow rate of the mixed liquid output by the conveyor 1 and the liquid level change situation of the first collection box 3, where:

[0060] If the volume ratio is less than the first preset volume ratio standard, the central control unit determines that the determination reference for the liquid level change situation of the first collection box 3 needs to be corrected; the first preset volume ratio standard is set to 1.3;

[0061] If the volume ratio is greater than the first preset volume ratio standard, the central control unit determines that the determination reference for the liquid level change situation of the first collection box 3 does not need to be corrected, determines that the working state of the current lead-acid battery acid shower recovery system is unqualified, and the central control unit determines the angle adjustment method for the conveyor belt 2 based on the liquid level change situation of the first collection box 3.

[0062] Please continue to refer to Figures 1 to 4 As shown, when the central control unit determines that the determination reference for the liquid level change situation of the first collection box 3 needs to be corrected, the central control unit sets a correction method for the determination reference for the liquid level change situation of the first collection box 3 based on the volume ratio of the flow rate of the mixed liquid output by the conveyor 1 and the liquid level change situation of the first collection box 3, where:

[0063] The first correction method is that the central control unit determines that the volume ratio is less than the first preset volume ratio standard and greater than or equal to the second preset volume ratio standard, then the central control unit increases the first preset liquid level difference standard, the second preset liquid level difference standard, and the third preset liquid level difference standard by 5 cm respectively; the second preset volume ratio standard is set to 1.2;

[0064] The second correction method is that the central control unit determines that the volume ratio is less than the second preset volume ratio standard and greater than or equal to the third preset volume ratio standard, then the central control unit increases the first preset liquid level difference standard, the second preset liquid level difference standard, and the third preset liquid level difference standard by 3 cm respectively; the third preset volume ratio standard is set to 1.1;

[0065] The third correction method is that if the central control unit determines that the volume ratio is less than the third preset volume ratio standard, the central control unit will increase the first preset liquid level difference standard, the second preset liquid level difference standard, and the third preset liquid level difference standard by 1 cm respectively.

[0066] Please continue to refer to Figures 1 to 4 As shown, the central control unit determines the liquid level change condition of the first collection box 3 based on the re-determined determination reference for the liquid level change condition of the first collection box 3:

[0067] The second one determination method is that when the central control unit determines that the separation of the lead paste and the acid solution does not meet the standard, the central control unit determines the adjustment method for the distance between the soft rubber pressure roller 6 and the conveyor belt 2 based on the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node; the second one determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is less than or equal to the re-determined first preset liquid level difference standard in the central control unit;

[0068] The second two determination method is that when the central control unit preliminarily determines that the separation of the lead paste and the acid solution meets the standard, the central control unit determines the slope of the conveyor belt 2 according to the ratio of the liquid level change condition in the first collection box 3 to the liquid level change condition in the second collection box 4; the second two determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the re-determined first preset liquid level difference standard in the central control unit and less than or equal to the second preset liquid level difference standard;

[0069] The second three determination method is that when the central control unit determines that the separation of the lead paste and the acid solution meets the standard and determines that the lead paste recovery process is qualified; the second three determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the re-determined second preset liquid level difference standard in the central control unit and less than or equal to the third preset liquid level difference standard;

[0070] The second four determination method is that when the central control unit preliminarily determines that the separation of the lead paste and the acid solution does not meet the standard, the central control unit issues a notice that the recovery is unqualified; the second four determination method satisfies that the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is greater than the re-determined third preset liquid level difference standard in the central control unit.

[0071] Please continue to refer to Figures 1 to 4As shown, when the central control unit determines that the difference in the liquid level height of the first collection box 3 does not conform to the preset standard in the central control unit with respect to the difference in the output volume of the mixed liquid, the central control unit has an angle adjustment method for the angle between the conveyor belt 2 and the horizontal plane based on the excessive difference in the first collection box 3, where:

[0072] The first angle adjustment method is that when the central control unit determines that the excessive difference conforms to the preset excessive difference standard, the central control unit determines to increase the angle between the conveyor belt 2 and the horizontal plane by 5°; the first angle adjustment method satisfies that the excessive difference is less than or equal to the preset excessive difference standard; the excessive difference refers to the liquid level change in the first collection box 3 when the difference between the liquid level in the first collection box 3 and the liquid level in the first collection box 3 measured at the previous detection time node is higher than the third preset liquid level difference standard preset in the central control unit; the excessive difference standard is set to 35 cm;

[0073] The second angle adjustment method is that when the central control unit determines that the excessive difference does not conform to the preset excessive difference standard, the central control unit determines to increase the angle between the conveyor belt 2 and the horizontal plane by 10°; the second angle adjustment method satisfies that the excessive difference is greater than or equal to the preset excessive difference standard.

[0074] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0075] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A leaching acid recovery system based on lead-acid batteries, characterized in that, Comprising: A conveyor for recovering and conveying a mixture of lead paste and acid solution; A separation unit provided at the output end of the conveyor, including a conveyor belt for receiving the mixture, a soft rubber pressure roller provided on the conveyor belt for squeezing and filtering the mixture, and a scraping plate provided on the conveyor belt for scraping the lead paste after solid-liquid separation on the conveyor belt; capillary pores for permeating and filtering the mixture are provided on the tread material of the conveyor belt, and the soft rubber pressure roller is provided on the side of the scraping plate close to the conveyor and is connected to the conveyor belt through a telescopic device; A collection unit provided below the conveyor belt for collecting the acid solution output by the separation unit, including a first collection box, a second collection box, and a third collection box arranged in parallel, the heights of the collection boxes decrease in sequence and the height of the first collection box is the largest; A collection unit including a liquid level sensor respectively provided in each of the collection boxes for detecting the liquid level change of each collection box and a flow sensor provided in the conveyor for detecting the flow rate of the mixture output by the conveyor; A central control unit respectively connected to the corresponding components in the separation unit and the collection unit for determining the distance between the soft rubber pressure roller and the conveyor belt or the slope of the conveyor belt when it is determined that the separation of lead paste and acid solution does not meet the standard based on the liquid level change of the first collection box collected by the collection unit; the central control unit is also used to determine a preset liquid level change amount used as a determination reference based on the mixture conveying amount of the conveyor.

2. The acid drenching recovery system based on lead-acid batteries according to claim 1, wherein, The liquid level change of the first collection box is the difference between the liquid level in the first collection box measured by the corresponding liquid level sensor at the current detection time node and the liquid level in the first collection box measured at the previous detection time node; the liquid level change of the second collection box is the difference between the liquid level in the second collection box measured by the corresponding liquid level sensor at the current detection time node and the liquid level in the second collection box measured at the previous detection time node; The central control unit determines the distance between the soft rubber pressure roller and the conveyor belt according to the obtained liquid level change of the first collection box, or determines the slope of the conveyor belt according to the obtained liquid level change of the first collection box and the liquid level change of the second collection box.

3. The acid drenching recovery system based on lead-acid batteries according to claim 2, characterized in that, The central control unit has several distance adjustment methods for the distance between the soft rubber pressure roller and the conveyor belt based on the liquid level change of the first collection box, and the adjustment amplitude for the distance under each distance adjustment method is different.

4. The acid drenching recovery system based on lead-acid batteries according to claim 3, wherein, The central control unit has several speed adjustment methods for the conveyor belt speed based on the distance between the soft rubber pressure roller and the conveyor belt, and the adjustment amplitude for the conveyor belt speed under each speed adjustment method is different.

5. The acid drenching recovery system based on lead-acid batteries according to claim 2, wherein The central control unit determines the slope of the conveyor belt based on the ratio of the obtained liquid level change of the first collection box and the liquid level change of the second collection box.

6. The acid drenching recovery system based on lead-acid batteries according to claim 5, characterized in that, The central control unit is provided with several slope adjustment methods for the conveyor belt slope based on the ratio of the liquid level change in the first collection box and the liquid level change in the second collection box obtained, and the adjustment range of the conveyor belt slope under each slope adjustment method is different.

7. The acid drenching recovery system based on lead-acid batteries according to claim 2, wherein The central control unit determines the determination reference for the liquid level change of the first collection box corresponding to the volume ratio obtained based on the flow rate of the mixed liquid output by the conveyor and the liquid level change of the first collection box. The volume ratio is the ratio of the volume of the mixed liquid output by the conveyor within a preset time period obtained by the central control unit according to the flow rate of the mixed liquid to the volume of the acid liquid received by the first collection box within the same time interval obtained according to the liquid level change of the first collection box.

8. The acid drenching recovery system based on lead-acid batteries according to claim 7, characterized in that, The central control unit is provided with several correction methods for the determination reference of the liquid level change of the first collection box based on the volume ratio of the flow rate of the mixed liquid output by the conveyor and the liquid level change of the first collection box, and the determination references obtained under each correction method are different.

9. The acid drenching recovery system based on lead-acid batteries according to claim 8, characterized in that, When the central control unit further determines that the liquid level change of the first collection box does not meet the standard based on the re-determined determination reference for the liquid level change of the first collection box, it determines the distance between the soft rubber pressing roller and the conveyor belt based on the liquid level change in the first collection box, or determines the slope of the conveyor belt according to the liquid level change in the first collection box and the liquid level change in the second collection box obtained.

10. The acid drenching recovery system based on lead-acid batteries according to claim 7, wherein When the difference between the liquid level heights of the first collection box and the difference in the output amount of the mixed liquid do not meet the preset standard in the central control unit, the central control unit determines several angle adjustment methods for the angle of the conveyor belt based on the liquid level change of the first collection box, and the reduction amplitude of the inclination angle of the conveyor belt under each angle adjustment method is different.

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