High-purity graphite product production acid liquor recovery device with countercurrent adsorption function

Abstract

The utility model provides a high-purity graphite product production acid liquor recovery device with countercurrent adsorption, which belongs to the technical field of acid liquor recovery devices, and comprises an adsorption cylinder consisting of an inner cylinder and an outer cylinder which are concentrically arranged, and an annular gap is formed between the inner cylinder and the outer cylinder; an acid liquor inlet pipe communicated with the annular gap is arranged at the top of the adsorption barrel, and an adsorbent inlet pipe communicated with the annular gap is arranged at the bottom of the adsorption barrel; a plurality of holes used for discharging adsorbed impurities are formed in the wall of the adsorption cylinder, a collecting pipe used for collecting purified acid liquor is arranged at the bottom of the adsorption cylinder, an exhaust port used for discharging residual gas is further formed in the top of the adsorption cylinder, the top end of an inner cylinder of the adsorption cylinder is closed, and a flange plate connected with an acid liquor inlet pipe is arranged at the top end of an outer cylinder of the adsorption cylinder. The problem that a traditional high-purity graphite production acid liquor recovery device is low in adsorption efficiency is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of acid recovery devices, specifically, it relates to an acid recovery device for high-purity graphite product production with countercurrent adsorption. Background Technology

[0002] In the production of high-purity graphite products, the use of acid is extremely common. Acid is mainly used to purify graphite raw materials, removing impurities through chemical reactions to obtain high-purity graphite products. However, the used acid contains a large number of impurities; direct discharge would not only cause serious environmental pollution but also lead to resource waste. Therefore, acid recovery devices have become an indispensable and important piece of equipment in the production of high-purity graphite.

[0003] Traditional acid recovery devices for high-purity graphite production typically employ simple adsorption tanks or filtration equipment. These devices have several drawbacks in practical applications. First, during adsorption, the contact between the acid and adsorbent in traditional devices is insufficient. For example, some adsorption tanks use a single-chamber structure, resulting in uneven mixing of the acid and adsorbent within the tank. This leads to impurities in the acid not being completely adsorbed, resulting in low purity of the recovered acid, which fails to meet the quality requirements for high-purity graphite production. Second, impurity handling capacity is insufficient. Traditional devices often lack an effective impurity removal mechanism, allowing adsorbed impurities to accumulate within the device, clogging the flow channels and affecting the normal flow of acid and adsorbent, thereby reducing acid recovery efficiency and increasing equipment maintenance costs. Moreover, the inability to remove impurities in a timely manner may cause them to re-mix into the acid, further reducing the quality of acid recovery. Furthermore, the structural design of traditional acid recovery devices is not optimal, leading to poor operational stability. Additionally, traditional devices have low precision in controlling the flow of acid and adsorbent, making it difficult to flexibly adjust according to actual production needs. This makes it difficult to achieve the optimal ratio of acid to adsorbent. Either too much adsorbent is used, leading to waste and increased production costs, or adsorption is insufficient, preventing efficient acid recovery. Furthermore, the poor sealing of components in traditional devices makes acid or adsorbent leaks common, polluting the working environment and threatening operator safety. Additionally, traditional devices have a short lifespan. Due to the corrosive nature of acid and adsorbent, components made of ordinary materials are easily corroded and damaged, requiring frequent replacements and further increasing operating costs. Utility Model Content

[0004] In view of this, the present invention provides an acid recovery device for high-purity graphite production with countercurrent adsorption, which solves the problem of low adsorption efficiency in traditional acid recovery devices for high-purity graphite production.

[0005] This utility model is implemented as follows:

[0006] This invention provides an acid recovery device for high-purity graphite product production with countercurrent adsorption, comprising an adsorption cylinder composed of two concentrically arranged inner and outer cylinders, with an annular gap between the inner and outer cylinders; an acid inlet pipe communicating with the annular gap is provided at the top of the adsorption cylinder, and an adsorbent inlet pipe communicating with the annular gap is provided at the bottom; the adsorption cylinder wall is provided with multiple holes for discharging adsorbed impurities, the bottom of the adsorption cylinder is provided with a collection pipe for collecting purified acid, and the top of the adsorption cylinder is also provided with an exhaust port for discharging residual gas.

[0007] The technical advantages of this utility model for a high-purity graphite product production acid recovery device with countercurrent adsorption are as follows: The annular gap formed by two concentric cylinders provides a stable and uniform countercurrent contact space for the acid and adsorbent. Compared to traditional structures, this allows for more thorough mixing and reaction of the acid and adsorbent, significantly improving adsorption efficiency. The acid inlet pipe and adsorbent inlet pipe are connected to the annular gap, enabling directional transport of the acid and adsorbent and ensuring the smooth operation of the countercurrent adsorption process. Small holes on the cylinder wall allow for timely discharge of adsorbed impurities, preventing impurity accumulation from affecting the adsorption effect and device operation, ensuring smooth flow within the annular gap, thereby achieving efficient acid adsorption and recovery. The inner and outer cylinders are made of corrosion-resistant metal materials, effectively resisting corrosion from the acid and adsorbent and extending the service life of the adsorption cylinder.

[0008] Based on the above technical solution, the acid recovery device for high-purity graphite product production with countercurrent adsorption of this utility model can be further improved as follows:

[0009] The inner cylinder of the adsorption tube is closed at the top, and the outer cylinder is provided with a flange at the top that is connected to the acid inlet pipe. The acid inlet pipe is fixedly connected to the outer cylinder through the flange and communicates with the annular gap.

[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the inner cylinder is closed at the top, and the outer cylinder is fixedly connected to the acid inlet pipe through a flange. This structural design ensures that the acid can only enter the annular gap through the acid inlet pipe, preventing acid leakage. At the same time, it facilitates the installation and disassembly of the acid inlet pipe, making it convenient for the maintenance and repair of the device. The flange connection method has good sealing performance and stability, ensuring that there will be no leakage or dripping of acid during transportation, thus improving the safety and reliability of the device.

[0011] Furthermore, the bottom end of the outer cylinder of the adsorption tube is closed, and the bottom end of the inner cylinder is provided with a flange that is connected to the adsorbent inlet pipe. The adsorbent inlet pipe is fixedly connected to the inner cylinder through the flange and communicates with the annular gap.

[0012] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the bottom of the outer cylinder is closed, and the inner cylinder is fixedly connected to the adsorbent inlet pipe through a flange, which ensures that the adsorbent can only enter the annular gap from the adsorbent inlet pipe, preventing adsorbent leakage, and at the same time facilitating the installation and disassembly of the adsorbent inlet pipe; this connection method ensures that the adsorbent can be stably and accurately delivered into the annular gap to carry out a countercurrent adsorption reaction with the acid, thereby improving the adsorption effect and the quality of acid recovery.

[0013] Furthermore, the plurality of holes are distributed in a ring array on the wall of the outer cylinder of the adsorption tube.

[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: multiple small holes are distributed in a ring array on the outer cylinder wall of the adsorption tube, which can make the adsorbed impurities evenly discharged, avoid the blockage of the flow channel in the annular gap due to the local accumulation of impurities, and ensure the normal flow of acid and adsorbent in the annular gap; the evenly distributed small holes help maintain the pressure balance in the annular gap, making the adsorption process more stable and improving the acid recovery efficiency and quality.

[0015] Furthermore, the outer cylinder of the adsorption tube is provided with a support bracket for supporting the adsorption tube, and the support bracket is fixedly connected to the outer cylinder by welding.

[0016] The support frame mainly consists of columns, support beams, reinforcing ribs, and fasteners. The columns are multiple vertically arranged rod-like structures; the number depends on the size and weight of the adsorption cylinder, typically 3-4, and they are evenly distributed around the outer side of the adsorption cylinder. Each column has a base with mounting holes, allowing the column to be securely installed on the ground or other mounting surfaces using bolts or other fasteners.

[0017] Furthermore, the acid inlet pipe is equipped with a flow control valve for controlling the acid flow rate, and the flow control valve is connected to the acid inlet pipe by a thread.

[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the flow control valve on the acid inlet pipe can accurately adjust the flow rate of the acid according to the actual production needs, so that the ratio of acid to adsorbent reaches the optimal state, thereby improving the adsorption effect and acid recovery efficiency; by controlling the acid flow rate, problems such as insufficient adsorption or resource waste caused by excessive or insufficient acid flow rate can be effectively avoided, thereby optimizing the acid recovery process and saving energy.

[0019] Furthermore, the adsorbent inlet pipe is provided with a flow regulator for controlling the adsorbent flow rate, and the flow regulator is connected to the adsorbent inlet pipe by a snap-fit ​​connection.

[0020] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the flow regulating component on the adsorbent inlet pipe can flexibly adjust the flow rate of the adsorbent according to the flow rate and properties of the acid, ensuring that the acid and adsorbent react fully, improving the adsorption efficiency and the degree of acid purification; by precisely controlling the adsorbent flow rate, the waste of adsorbent can be effectively reduced, production costs can be lowered, and the stability of acid recovery quality can be guaranteed at the same time.

[0021] Furthermore, the collecting pipe is connected to the interior of the inner cylinder, and the collecting pipe and the inner cylinder are fixedly connected by welding.

[0022] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the collection pipe at the bottom of the adsorption cylinder is connected to the inside of the inner cylinder, which can collect the purified acid in time and transport it to the subsequent processing equipment or storage device, avoiding the residue of purified acid in the adsorption cylinder and ensuring the continuity and efficiency of acid recovery; the collection pipe is fixedly connected to the inner cylinder by welding, which has good sealing performance, prevents the leakage of purified acid, and ensures the quality of acid recovery.

[0023] Furthermore, the exhaust port is connected to the annular gap, and a sealing cap is provided on the exhaust port.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the exhaust port set at the top of the adsorption cylinder can promptly discharge the residual gas generated by the acid and adsorbent during the reaction process, avoiding the accumulation of gas in the annular gap, which would affect the flow of acid and adsorbent and the adsorption effect; the sealing cap on the exhaust port can seal the exhaust port when no exhaust is required, preventing external impurities from entering the adsorption cylinder and ensuring the sealing and safety of the acid recovery process.

[0025] Furthermore, a plurality of limiting rods are provided between the inner cylinder and the outer cylinder, evenly distributed along the circumference. The two ends of the limiting rods are fixedly connected to the outer surface of the inner cylinder and the inner surface of the outer cylinder, respectively, to maintain the stability of the annular gap spacing.

[0026] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the limiting rods set between the inner cylinder and the outer cylinder can maintain the stability of the spacing of the annular gap, prevent the relative displacement of the inner cylinder and the outer cylinder under the pressure of acid and adsorbent, ensure the stability of the flow space and contact area of ​​acid and adsorbent in the annular gap, thereby improving the stability of the adsorption effect; multiple limiting rods are evenly distributed along the circumference, further enhancing the relative stability of the inner cylinder and the outer cylinder, ensuring the long-term stable operation of the device.

[0027] Compared with existing technologies, the beneficial effects of the acid recovery device for high-purity graphite product production with countercurrent adsorption provided by this utility model are:

[0028] This invention, through its innovative design of the overall structure and individual components, brings about many significant benefits. Overall, the unique structure, formed by concentric inner and outer cylinders creating an annular gap, provides a stable and uniform countercurrent contact space for the acid and adsorbent. Compared to traditional structures, this greatly enhances the mixing and reaction of the acid and adsorbent, thus improving adsorption efficiency.

[0029] From the perspective of component innovation, the acid inlet pipe is connected to the outer cylinder via a flange, and the adsorbent inlet pipe is connected to the inner cylinder via a flange. This connection method not only ensures the directional delivery of acid and adsorbent and prevents leakage, but also facilitates installation and disassembly, making equipment maintenance and repair convenient. Taking traditional welded pipe connections as an example, once damaged, repairs are difficult and time-consuming; however, the flange connection method of this utility model allows for quick disassembly and replacement when the pipe is damaged.

[0030] The small holes arranged in a ring array on the wall of the adsorption cylinder can evenly discharge the adsorbed impurities, effectively preventing impurities from accumulating and clogging the flow channels, maintaining the pressure balance in the annular gaps, ensuring the normal flow of acid and adsorbent, making the adsorption process more stable, and further improving the efficiency and quality of acid recovery.

[0031] The flow control valve on the acid inlet pipe and the flow regulator on the adsorbent inlet pipe can precisely adjust the flow rates of acid and adsorbent according to actual production needs, so that the ratio of the two reaches the optimal state, avoiding insufficient adsorption or resource waste caused by improper flow, and realizing the optimization and energy saving of the acid recovery process. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0033] Figure 1 Example diagram of an acid recovery device for the production of high-purity graphite products with countercurrent adsorption;

[0034] Figure 2 A perspective view of an acid recovery device for the production of high-purity graphite products with countercurrent adsorption;

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 10. Adsorption cylinder; 11. Cylinder; 12. Hole; 13. Collection tube; 14. Support bracket; 15. Exhaust port; 20. Acid inlet pipe; 30. Adsorbent inlet pipe. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0038] like Figure 1 , Figure 2 The image shows a first embodiment of an acid recovery device for high-purity graphite product production with countercurrent adsorption provided by this utility model. In this embodiment, it includes an adsorption cylinder 10 composed of two concentrically arranged inner and outer cylinders 11, with an annular gap formed between the inner and outer cylinders 11. The top of the adsorption cylinder 10 is provided with an acid inlet pipe 20 communicating with the annular gap, and the bottom is provided with an adsorbent inlet pipe 30 communicating with the annular gap. The cylinder wall of the adsorption cylinder 10 is provided with a plurality of holes 12 for discharging impurities after adsorption. The bottom of the adsorption cylinder 10 is provided with a collection pipe 13 for collecting purified acid, and the top of the adsorption cylinder 10 is also provided with an exhaust port 15 for discharging residual gas.

[0039] In the above technical solution, the top of the inner cylinder of the adsorption cylinder is closed, and the top of the outer cylinder is provided with a flange that is connected to the acid inlet pipe 20. The acid inlet pipe 20 is fixedly connected to the outer cylinder through the flange and communicates with the annular gap.

[0040] Furthermore, in the above technical solution, the bottom end of the outer cylinder of the adsorption cylinder 10 is closed, and the bottom end of the inner cylinder is provided with a flange connected to the adsorbent inlet pipe 30. The adsorbent inlet pipe 30 is fixedly connected to the inner cylinder through the flange and communicates with the annular gap.

[0041] Furthermore, in the above technical solution, multiple holes 12 are arranged in a ring array on the wall of the outer cylinder of the adsorption tube.

[0042] Furthermore, in the above technical solution, a support bracket 14 for supporting the adsorption tube is provided on the outer side of the outer cylinder of the adsorption tube, and the support bracket 14 is fixedly connected to the outer cylinder by welding.

[0043] The supporting beams are horizontally arranged rod-like structures, with at least two beams positioned at the upper middle and upper parts of the column, respectively. Both ends of the supporting beams are fixedly connected to the column by welding or bolting, forming a frame structure to support the weight of the adsorption cylinder. An arc-shaped support bracket is provided at the contact point between the supporting beam and the outer surface of the outer cylinder. The curvature of the arc-shaped support bracket matches the outer surface of the outer cylinder, increasing the contact area and making the support more stable.

[0044] The reinforcing ribs are inclined rod-shaped structures that connect the column and the supporting beam, enhancing the overall stability of the support structure. One end of the reinforcing rib is fixedly connected to the column near the supporting beam, and the other end is fixedly connected to the supporting beam. Multiple reinforcing ribs are staggered to form a triangular stable structure, effectively improving the support structure's resistance to deformation and its load-bearing capacity.

[0045] The fastener is used to securely connect the support bracket to the outer cylinder of the adsorption cylinder, preventing the adsorption cylinder from shaking during operation. The fastener can be a clamp, which is set around the outside of the outer cylinder and tightened with bolts to make it fit tightly against the surface of the outer cylinder, thus firmly fixing the adsorption cylinder to the support bracket; or it can be a fixing block welded between the support beam and the outer cylinder, which fixes the adsorption cylinder to the support bracket by welding.

[0046] Furthermore, in the above technical solution, the acid inlet pipe 20 is provided with a flow control valve for controlling the acid flow rate, and the flow control valve is connected to the acid inlet pipe 20 by a thread.

[0047] The flow control valve mainly consists of a valve body, valve core, valve stem, adjusting handle, and seals. The valve body has a tubular structure, its inner diameter matching the inner diameter of the acid inlet pipe. Both ends of the valve body are connected to the acid inlet pipe via threads. The valve core is housed within the valve body's internal cavity, its shape conforming to the cavity, allowing axial movement within the valve body. One end of the valve stem is fixedly connected to the valve core, while the other end passes through the top of the valve body and extends to the outside, connecting to the adjusting handle. Seals are installed around the contact area between the valve core and the valve body to prevent acid leakage.

[0048] When acid flow needs to be adjusted, the operator rotates the adjusting handle, which in turn rotates the valve stem. Since the valve stem is fixedly connected to the valve core, the rotation of the valve stem causes the valve core to move axially within the valve body. This movement of the valve core alters the flow area within the valve body. When the valve core moves upward, the flow area increases, increasing the acid flow rate; conversely, when the valve core moves downward, the flow area decreases, reducing the acid flow rate. This method achieves precise control of the acid flow rate. Simultaneously, the sealing components effectively prevent acid leakage from the gap between the valve core and the valve body during valve core movement, ensuring accurate flow control and the safety of the device.

[0049] Furthermore, in the above technical solution, the adsorbent inlet pipe 30 is provided with a flow regulating component for controlling the flow rate of the adsorbent, and the flow regulating component is connected to the adsorbent inlet pipe 30 by a snap-fit ​​connection.

[0050] The flow regulating component consists of an regulating sleeve, a fixed sleeve, and a sealing ring. The fixed sleeve is a hollow tubular structure with an inner diameter matching that of the adsorbent inlet pipe. One end of the fixed sleeve is fixedly connected to the adsorbent inlet pipe via a snap-fit, while the other end has external threads. The regulating sleeve is also a hollow tubular structure with internal threads on its inner wall that match the external threads of the fixed sleeve. The regulating sleeve can be screwed onto the outside of the fixed sleeve. The sealing ring is installed at the contact point between the regulating sleeve and the fixed sleeve to provide a seal and prevent adsorbent leakage.

[0051] The adsorbent flow rate is adjusted by rotating the adjusting sleeve. When the adjusting sleeve rotates along the thread of the fixed sleeve, the relative position between the adjusting sleeve and the fixed sleeve changes, thereby altering the flow area within the adsorbent inlet pipe. When the adjusting sleeve rotates away from the adsorbent inlet pipe, the gap between the adjusting sleeve and the fixed sleeve increases, increasing the flow area within the adsorbent inlet pipe and thus increasing the adsorbent flow rate. Conversely, when the adjusting sleeve rotates closer to the adsorbent inlet pipe, the gap between the adjusting sleeve and the fixed sleeve decreases, reducing the flow area within the adsorbent inlet pipe and thus decreasing the adsorbent flow rate. The sealing ring effectively prevents adsorbent leakage from the gap between the adjusting sleeve and the fixed sleeve during adjustment, ensuring the stability and accuracy of the adsorbent flow rate adjustment.

[0052] Furthermore, in the above technical solution, the collecting pipe 13 is connected to the inside of the inner cylinder, and the collecting pipe 13 and the inner cylinder are fixedly connected by welding.

[0053] Furthermore, in the above technical solution, the exhaust port 15 is connected to the annular gap, and a sealing cap is provided on the exhaust port 15.

[0054] Furthermore, in the above technical solution, a plurality of limiting rods are provided between the inner cylinder and the outer cylinder, which are evenly distributed along the circumference. The two ends of the limiting rods are fixedly connected to the outer surface of the inner cylinder and the inner surface of the outer cylinder, respectively, to maintain the stability of the annular gap spacing.

[0055] Specifically, the principle of this utility model is as follows:

[0056] The core technology of this invention is based on countercurrent adsorption and the coordinated operation of various components to achieve efficient acid recovery. The countercurrent adsorption principle refers to the acid and adsorbent flowing in opposite directions within an annular gap. This design fully utilizes the concentration difference between the two, increasing the driving force for mass transfer and making it easier for impurities in the acid to be adsorbed by the adsorbent. In traditional cocurrent contact methods, the concentration difference between the acid and adsorbent gradually decreases as the adsorption process progresses, leading to a rapid decline in adsorption efficiency. However, in countercurrent adsorption, the acid initially contacts a fresh adsorbent with strong adsorption capacity upon entering the device, and then contacts an adsorbent that has adsorbed more impurities but still retains some adsorption capacity upon leaving the device. This maximizes the adsorbent's effectiveness and improves adsorption efficiency.

[0057] In terms of specific structural implementation, the annular gap formed by the concentric inner and outer cylinders is key to achieving countercurrent adsorption. Acid is injected through the acid inlet pipe at the top of the annular gap and flows downwards under gravity; the adsorbent is injected through the adsorbent inlet pipe at the bottom of the annular gap and flows upwards, with both reacting countercurrently within the annular gap. The design of the annular gap allows for uniform distribution and thorough mixing of the acid and adsorbent, significantly increasing the contact area. Compared to traditional single-chamber stirring mixing methods, the fluid flow within the annular gap is more stable, reducing the adverse effects of turbulence generated by stirring on the adsorption process and resulting in a more complete adsorption reaction.

[0058] Flow control valves and flow regulators achieve precise control of the acid and adsorbent flow rates by altering the flow area of ​​the flow channels. Operators, according to production process requirements, rotate the regulating handle of the flow control valve, moving the valve core and changing the flow area of ​​the acid inlet pipe, thereby adjusting the acid flow rate. Similarly, by rotating the flow regulator on the adsorbent inlet pipe, the gap between the regulating sleeve and the fixed sleeve is changed, adjusting the adsorbent flow rate. Precise flow control ensures that the acid and adsorbent maintain a suitable ratio, creating conditions for efficient adsorption reactions.

[0059] The collecting pipe is connected to the inner cylinder. Under gravity, the purified acid flows from the bottom of the inner cylinder into the collecting pipe and is then transported to subsequent processing equipment or storage devices. The exhaust port utilizes the property that gas density is less than liquid density; when gas accumulates in the annular gap, it rises and is discharged through the exhaust port. The sealing cap acts as a seal when no exhaust is being performed, preventing external impurities from entering the adsorption cylinder and ensuring the airtightness and safety of the acid recovery process. The limiting rod maintains a stable spacing between the annular gap by fixing the relative positions of the inner and outer cylinders, ensuring that the acid and adsorbent undergo a countercurrent adsorption reaction within a stable flow space, thus maintaining the stability of the adsorption effect.

Claims

1. A high-purity graphite product production acid liquid recovery device with countercurrent adsorption, characterized by, The adsorption cylinder comprises two concentrically arranged cylinders, an inner cylinder and an outer cylinder, and an annular gap is formed between the inner cylinder and the outer cylinder; the top of the adsorption cylinder is provided with an acid liquid inlet pipe in communication with the annular gap, and the bottom of the adsorption cylinder is provided with an adsorbent inlet pipe in communication with the annular gap; a plurality of holes for discharging impurities after adsorption are arranged on the wall of the adsorption cylinder, and a collection pipe for collecting purified acid liquid is arranged at the bottom of the adsorption cylinder; and an exhaust port for discharging residual gas is arranged at the top of the adsorption cylinder.

2. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 1, characterized in that, The top end of the inner cylinder of the adsorption cylinder is closed, and the top end of the outer cylinder is provided with a flange plate connected with the acid liquid inlet pipe; the acid liquid inlet pipe is fixedly connected with the outer cylinder through the flange plate and is in communication with the annular gap.

3. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 2, characterized in that, The bottom end of the outer cylinder of the adsorption cylinder is closed, and the bottom end of the inner cylinder is provided with a flange plate connected with the adsorbent inlet pipe; the adsorbent inlet pipe is fixedly connected with the inner cylinder through the flange plate and is in communication with the annular gap.

4. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 3, characterized in that, The plurality of holes are arranged in an annular array on the wall of the outer cylinder of the adsorption cylinder.

5. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 4, characterized in that, A supporting bracket for supporting the adsorption cylinder is arranged outside the outer cylinder of the adsorption cylinder, and the supporting bracket is fixedly connected with the outer cylinder by welding.

6. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 5, characterized by A flow control valve for controlling the flow of acid liquid is arranged on the acid liquid inlet pipe, and the flow control valve is threadedly connected with the acid liquid inlet pipe.

7. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 6, characterized by A flow regulating member for controlling the flow of adsorbent is arranged on the adsorbent inlet pipe, and the flow regulating member is buckled with the adsorbent inlet pipe.

8. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 7, characterized by The collection pipe is in communication with the inside of the inner cylinder, and the collection pipe is fixedly connected with the inner cylinder by welding.

9. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 8, characterized by The exhaust port is in communication with the annular gap, and a sealing cover is arranged on the exhaust port.

10. The apparatus for recovering an acid solution for producing a high-purity graphite product with countercurrent adsorption according to claim 9, characterized by A plurality of limiting rods are arranged between the inner cylinder and the outer cylinder and are uniformly distributed in the circumferential direction, and the two ends of the limiting rods are fixedly connected with the outer surface of the inner cylinder and the inner surface of the outer cylinder, respectively, for keeping the distance of the annular gap stable.

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