Flow regulation and control device and regulation and control method for acid in-situ leaching branch pipeline

Abstract

The invention provides a flow regulation and control device and method for an acid process in-situ leaching branch pipeline, and the method comprises the steps that when the detection pressure is larger than a preset pressure threshold value or the detection flow is smaller than a preset flow threshold value, a control terminal regulates and controls a branch pump body; the flow and pressure of liquid injected into the corresponding injection holes by the branch pipelines are within a target range; the method has the following beneficial effects that when the control terminal detects that the detection pressure of a certain branch pipeline is larger than the preset pressure threshold value, it is judged that formation resistance suddenly rises, and the control terminal can improve the output power of the branch pump body to overcome newly-added resistance; and when the detected flow is lower than a preset flow threshold value, it is judged that the liquid injection capacity is attenuated, and the control terminal starts a pump frequency continuous compensation mechanism of the branch pump bodies, so that the flow and pressure of liquid injected into the corresponding injection holes by the branch pipelines are within the target range.

Description

Technical Field

[0001] This application relates to the field of in-situ leaching uranium mining engineering technology, and in particular to a flow control device and control method for acid leaching branch pipelines. Background Technology

[0002] In in-situ leaching uranium mining, as mining progresses into the middle and later stages, the ore body's dissolution channels gradually become blocked due to mineral precipitation and other factors, leading to a continuous increase in formation pressure. This directly results in a significant increase in the injection resistance of each branch pipeline, causing a general decrease in injection flow rate. To maintain the injection volume and ensure leaching effectiveness, existing technologies typically employ increasing the pressure of the main system pump. However, this method has several unavoidable technical drawbacks: First, increasing the main system pump pressure is a global control measure, which cannot achieve precise differentiated flow distribution based on the resistance differences of each branch pipeline, easily leading to over-injection in some injection holes and under-injection in others. Second, the system operating under high pressure for extended periods exacerbates pipeline fatigue and aging, significantly increasing the safety risks of pipeline joint leaks and even localized overpressure bursts. Third, this method lacks a dynamic compensation mechanism for changes in flow rate in individual wells, making it difficult to adapt to real-time fluctuations in formation resistance, ultimately affecting the ore body leaching efficiency and uranium resource recovery rate. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, a first aspect of the present invention provides a flow control device for a branch pipeline in an acid leaching process, comprising:

[0006] A liquid collection tank, which is used to store injected liquid, and a main pipeline is provided on the liquid collection tank; Branch pipelines, multiple branch pipelines are connected in parallel on the main pipeline for injecting liquid into each injection port, and branch control valves and branch pump bodies are connected in series on the branch pipelines; The control terminal collects the pressure data of the main pipeline and the pressure data of the branch pipeline. The control terminal obtains the detection pressure based on the difference between the pressure data of the main pipeline and the pressure data of the branch pipeline. The control terminal also collects the flow data of the branch pipeline and obtains the detection flow based on the flow data of the branch pipeline. When the detected pressure is greater than a preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the branch pump body to ensure that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline are within the target range.

[0007] Optionally, a first pressure gauge is installed on the main pipeline, the first pressure gauge is electrically connected to the control terminal, and the first pressure gauge is used to detect the pressure data of the main pipeline.

[0008] Optionally, a main pump body and a main pipe control valve are sequentially connected in series on the main pipe and located between the liquid collection tank and the first pressure gauge, and the main pump body and the main pipe control valve are electrically connected to the control terminal.

[0009] Optionally, a branch flow meter and a branch pressure gauge are sequentially installed on the branch pipeline in the direction of the branch pump body outlet. The branch flow meter and the branch pressure gauge are electrically connected to the control terminal. The branch flow meter is used to detect the flow data of the branch pipeline, and the branch pressure gauge is used to detect the pressure data of the branch pipeline.

[0010] Optionally, a branch check valve is provided between the branch flow meter and the branch pressure gauge.

[0011] Optionally, the number of branch pipes is at least two.

[0012] A second aspect of this application provides an independent flow control method for a branch pipeline in an acid leaching process, comprising a flow control device for a branch pipeline in an acid leaching process as described in any of the above technical solutions, including: S1. Inject liquid into each of the branch pipes through the main pipe to ensure that the flow rate discharged from each of the branch pipes is balanced; S2. The control terminal collects the pressure of the main pipeline and the flow rate and pressure of each branch pipeline in real time. The control terminal obtains the detection pressure based on the difference between the pressure data of the main pipeline and the pressure data of the branch pipeline. The control terminal collects the flow rate data of the branch pipeline and obtains the detection flow rate based on the flow rate data of the branch pipeline. S3, when the detected pressure is greater than the preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the branch pump body so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline are within the target range.

[0013] Optionally, liquid is injected into each of the branch pipes through the main pipe to ensure a balanced flow rate discharged from each of the branch pipes, including: S11. Start the main pump body, open the main control valve on the main pipeline and the branch control valves on each of the branch pipelines, so that the liquid in the collection tank enters each of the branch pipelines through the main pipeline; S12. The control terminal collects the values ​​detected by the first pressure gauge on the main pipeline and the values ​​detected by the branch pressure gauge and the branch flow meter on each branch pipeline in real time, and adjusts the branch control valve through the control terminal to make the initial discharge flow of each branch pipeline equal.

[0014] Optionally, when the detected pressure is greater than a preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the output power of the branch pump body to ensure that the flow rate and pressure of the liquid injected into the corresponding injection port by each branch pipeline are within the target range, including: S31. When the detected pressure is greater than the preset pressure threshold, the control terminal adjusts the output power of the branch pump body on the corresponding branch pipeline so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline are within the target range. S32. When the detected flow rate is less than the preset flow rate threshold, the control terminal regulates the branch pump body on the corresponding branch pipeline to start the pump frequency continuous compensation mechanism, so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline are within the target range.

[0015] Optionally, the target range is that the real-time injection flow rate of each branch pipeline is maintained within ±5% of the preset target flow rate value, while the pressure fluctuation of each branch pipeline does not exceed 0.1 MPa.

[0016] Beneficial effects The embodiment of the present invention provides a flow control device and method for branch pipelines in acid leaching. During operation, the control terminal monitors the pressure and flow rate of the main pipeline and branch pipelines in real time. When the control terminal detects that the pressure of a certain branch pipeline is greater than a preset pressure threshold, it is determined that the formation resistance has suddenly increased. The control terminal will increase the output power of the branch pump to overcome the new resistance. When the detected flow rate is lower than the preset flow rate threshold, it is determined that the injection capacity has decreased. The control terminal will activate the pump frequency continuous compensation mechanism of the branch pump to ensure that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline are within the target range. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A structural diagram of one embodiment provided in this application; Figure 2 A flowchart of another embodiment provided in this application.

[0018] The correspondence between the reference numerals and the component names is as follows: 1. Collection tank; 2. Main pipeline; 3. Branch pipeline; 4. Branch control valve; 5. Branch pump body; 6. First pressure gauge; 7. Main pump body; 8. Main pipeline control valve; 9. Branch flow meter; 10. Branch pressure gauge; 11. Branch check valve. Detailed Implementation

[0019] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0021] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0022] Combined with appendix Figure 1 As shown, a flow control device for a branch pipeline in an acid leaching process, according to some embodiments of this application, includes: A liquid collection tank 1 is used to store injected liquid, and a main pipeline 2 is provided on the liquid collection tank 1; Branch pipes 3, multiple branch pipes 3 are connected in parallel on the main pipe 2, and are used to inject liquid into each injection hole. A branch control valve 4 and a branch pump body 5 are connected in series on the branch pipes 3. The control terminal collects pressure data from the main pipeline 2 and pressure data from the branch pipeline 3. The control terminal obtains the detection pressure based on the difference between the pressure data from the main pipeline 2 and the pressure data from the branch pipeline 3. The control terminal also collects flow data from the branch pipeline 3 and obtains the detection flow rate based on the flow data from the branch pipeline 3. When the detected pressure is greater than the preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the branch pump body 5 so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline 3 are within the target range.

[0023] In this technical solution, the independent flow control device for branch pipelines 3 in acid leaching provided in this application includes a collection tank 1, a main pipeline 2, branch pipelines 3, a branch control valve 4, a branch pump body 5, and a control terminal. The collection tank 1 serves as a storage carrier for the leaching agent, and its side wall bottom is connected to the main pipeline 2. The main pipeline 2 is used to transport the injection liquid (i.e., the leaching agent) stored in the collection tank 1 to each branch pipeline 3. Multiple branch pipelines 3 are connected in parallel to the output end of the main pipeline 2. The end of each branch pipeline 3 is connected to a corresponding leaching injection hole, enabling the leaching agent to be delivered to each target injection hole, achieving simultaneous multi-point leaching of the ore body. On each branch pipeline 3, a branch control valve 4 and a branch pump body 5 are sequentially connected in series along the liquid flow direction. The branch control valve 4 is mainly used to control the on / off state of the corresponding branch pipeline 3, and the branch pump body 5 provides power output for leaching agent injection. The control terminal communicates with the pressure detection elements on the main pipeline 2, and the pressure and flow detection elements on each branch pipeline 3 via communication lines. It can collect pressure data from the main pipeline 2 and the pressure and flow data from each branch pipeline 3 in real time. The control terminal calculates the pressure difference between each branch pipeline 3 and the main pipeline 2 to obtain the detection pressure, and directly uses the collected branch flow data as the detection flow rate, thereby realizing real-time monitoring of the fluid injection in each branch pipeline 3.

[0024] When the control terminal detects that the pressure of a certain branch pipeline 3 is greater than the preset pressure threshold, it is determined that the formation resistance has suddenly increased. The control terminal will increase the output power of the branch pump body 5 to overcome the new resistance until the flow rate of the liquid injected into the corresponding injection hole by the branch pipeline 3 is maintained within ±5% of the preset target flow rate value, and the pressure fluctuation does not exceed the target range of 0.1MPa. If the detected flow rate is lower than the preset flow rate threshold, it is determined that the injection capacity has decreased. The control terminal will activate the pump frequency continuous compensation mechanism of the branch pump body 5 until the flow rate of the liquid injected into the corresponding injection hole by the branch pipeline 3 is maintained within ±5% of the preset target flow rate value, and the pressure fluctuation does not exceed the target range of 0.1MPa.

[0025] According to some embodiments of this application, a first pressure gauge 6 is provided on the main pipeline 2. The first pressure gauge 6 is electrically connected to the control terminal and is used to detect the pressure data of the main pipeline 2.

[0026] A main pump body 7 and a main control valve 8 are sequentially connected in series on the main pipeline 2 and located between the liquid collection tank 1 and the first pressure gauge 6. The main pump body 7 and the main control valve 8 are electrically connected to the control terminal.

[0027] In this technical solution, a first pressure gauge 6 is installed on the main pipeline 2 and electrically connected to the control terminal. The first pressure gauge 6 can detect the liquid pressure in the main pipeline 2 in real time and generate pressure data for the main pipeline 2, which is then synchronously transmitted to the control terminal. By receiving the detection data from the first pressure gauge 6, the control terminal can understand the condition of the main pipeline 2, which is used for subsequent calculations of the pressure differential of each branch pipeline 3 and for determining changes in formation resistance.

[0028] Furthermore, a main pump body 7 and a main pipe control valve 8 are sequentially connected in series between the collection tank 1 and the first pressure gauge 6 in the main pipe 2, and both the main pump body 7 and the main pipe control valve 8 are electrically connected to the control terminal. The main pump body 7 is used to extract the leachate stored in the collection tank 1 and pressurize and deliver it to the main pipe 2, while the main pipe control valve 8 controls the on / off state of the main pipe 2.

[0029] According to some embodiments of this application, a branch flow meter 9 and a branch pressure gauge 10 are sequentially arranged on the branch pipeline 3 and in the direction of the outlet of the branch pump body 5. The branch flow meter 9 and the branch pressure gauge 10 are electrically connected to the control terminal. The branch flow meter 9 is used to detect the flow data of the branch pipeline 3, and the branch pressure gauge 10 is used to detect the pressure data of the branch pipeline 3.

[0030] A branch check valve 11 is provided between the branch flow meter 9 and the branch pressure gauge 10.

[0031] In this technical solution, on each branch pipeline 3, a branch flow meter 9 and a branch pressure gauge 10 are sequentially installed along the outlet direction of the liquid flow from the branch pump body 5 to the injection hole. Both the branch flow meter 9 and the branch pressure gauge 10 are electrically connected to the control terminal. The branch flow meter 9 can detect the real-time injection flow rate in the corresponding branch pipeline 3, generate branch flow data, and transmit it synchronously to the control terminal, providing a basis for the control terminal to determine whether the injection capacity of the branch has decreased. The branch pressure gauge 10 is used to collect the liquid pressure on the outlet side of the branch pump body 5, generate branch pressure data, and feed it back to the control terminal. The control terminal uses the difference between the pressure data of the branch pipeline 2 and the pressure data of the main pipeline 2 detected by the first pressure gauge 6 on the main pipeline 2 as a basis for determining the change of formation resistance.

[0032] Furthermore, a branch check valve 11 is installed between the branch flow meter 9 and the branch pressure gauge 10. The branch check valve 11 is installed to prevent back pressure backflow caused by changes in formation pressure on the injection port side. When the formation pressure rises instantaneously and exceeds the delivery pressure in the branch pipeline 3, the branch check valve 11 blocks the backflow of liquid from the injection port to the inside of the branch pipeline 3. This not only avoids interference of backflow liquid with the detection accuracy of the branch flow meter 9 and the branch pressure gauge 10, ensuring the accuracy of the monitoring data, but also prevents backflow pressure from impacting the branch pump body 5, reducing the risk of pump damage.

[0033] According to some embodiments of this application, the number of branch pipes 3 is at least two.

[0034] Combined with appendix Figure 2 As shown, an embodiment of the second aspect of this application proposes an independent flow control method for a branch pipeline in an acid leaching process, employing the flow control device for a branch pipeline in an acid leaching process provided in the first aspect embodiment, comprising: S1. Liquid is injected into each of the branch pipes 3 through the main pipe 2 to ensure that the flow rate discharged from each of the branch pipes 3 is balanced.

[0035] In this technical solution, the main pump body 7 on the main pipeline 2 is turned on, and the main control valve 8 on the main pipeline 2 and the branch control valve 4 on each branch pipeline 3 are kept open. When the main pump body 7 provides power, the liquid in the collection tank 1 enters the parallel branch pipelines 3 through the main pipeline 2, and is discharged into the injection hole through the branch pipelines 3 to realize the initial liquid injection passage. After the main pump body 7 feeds the liquid in the collection tank 1 into each branch pipeline 3, the control terminal collects the pressure value on the main pipeline 2 in real time through the first pressure gauge 6, the branch pressure gauge 10 detects the pressure on each branch pipeline 3, the branch flow meter 9 detects the flow rate on each branch pipeline 3, and according to the "flow-resistance" characteristic curve, the control terminal adjusts the branch control valve 4 on each branch pipeline 3 to make the initial discharge flow rate of each branch pipeline 3 into the injection hole equal.

[0036] S2. The control terminal collects the pressure of the main pipeline 2 and the flow rate and pressure of each branch pipeline 3 in real time. The control terminal obtains the detection pressure based on the difference between the pressure data of the main pipeline 2 and the pressure data of the branch pipeline 3. The control terminal collects the flow rate data of the branch pipeline 3 and obtains the detection flow rate based on the flow rate data of the branch pipeline 3.

[0037] In this technical solution, the control terminal collects pressure data of the main pipeline 2 in real time through the first pressure gauge 6 on the main pipeline 2. The control terminal also collects real-time flow data and real-time pressure data of the branch pipelines 3 through the branch flow meters 9 and branch pressure gauges 10 on each branch pipeline 3. The control terminal starts the built-in data processing unit to calculate the difference between the real-time pressure data of each branch pipeline 3 and the real-time pressure data of the main pipeline 2 to obtain the detection pressure of the branch pipeline 3. On the other hand, the control terminal directly sets the flow data collected by the branch flow meter 9 as the detection flow of the branch pipeline 3 for subsequent comparison with the preset pressure threshold and the preset flow threshold.

[0038] S3, when the detected pressure is greater than the preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the branch pump body 5 so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline 3 are within the target range.

[0039] In this technical solution, when the control terminal detects that the pressure of a certain branch pipeline 3 is greater than the preset pressure threshold, it is determined that the formation resistance has suddenly increased. The control terminal will increase the output power of the branch pump body 5 to actively overcome the new resistance until the flow rate of the liquid injected into the corresponding injection hole by the branch pipeline 3 is maintained within ±5% of the preset target flow rate value, and the pressure fluctuation does not exceed the target range of 0.1MPa. If the detected flow rate is lower than the threshold, it is determined that the injection capacity has decreased. The control terminal will activate the pump frequency continuous compensation mechanism of the branch pump body 5 until the flow rate of the liquid injected into the corresponding injection hole by the branch pipeline 3 is maintained within ±5% of the preset target flow rate value, and the pressure fluctuation does not exceed the target range of 0.1MPa, so as to ensure that the injection conditions of each injection hole are stable and balanced.

[0040] According to some embodiments of this application, liquid is injected into each of the branch pipes 3 through the main pipe 2 to ensure a balanced flow rate discharged from each of the branch pipes 3, including: S11. Start the main pump body 7, open the main control valve 8 on the main pipeline 2 and the branch control valves 4 on each of the branch pipelines 3, so that the liquid in the collection tank 1 enters each of the branch pipelines 3 through the main pipeline 2.

[0041] S12. The control terminal collects in real time the values ​​detected by the first pressure gauge 6 on the main pipeline 2 and the values ​​detected by the branch pressure gauge 10 and the branch flow meter 9 on each branch pipeline 3. The control terminal adjusts the branch control valve 4 to make the initial discharge flow of each branch pipeline 3 equal.

[0042] According to some embodiments of this application, when the detected pressure is greater than a preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal adjusts the output power of the branch pump body 5 to ensure that the flow rate and pressure of the liquid injected into the corresponding injection port by each branch pipeline 3 are within the target range, including: S31. When the detected pressure is greater than the preset pressure threshold, the control terminal adjusts the output power of the branch pump body 5 on the corresponding branch pipeline 3 so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline 3 are within the target range.

[0043] S32. When the detected flow rate is less than the preset flow rate threshold, the control terminal regulates the branch pump body 5 on the corresponding branch pipeline 3 to start the pump frequency continuous compensation mechanism, so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline 3 are within the target range.

[0044] According to some embodiments of this application, the target range is that the real-time injection flow rate of each of the branch pipes 3 is maintained within ±5% of the preset target flow rate value, while the pressure fluctuation of each of the branch pipes 3 does not exceed 0.1 MPa.

[0045] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flow control device for a branch pipeline in an acid leaching process, characterized in that, include: A liquid collection tank (1) is used to store injected liquid, and a main pipeline (2) is provided on the liquid collection tank (1); Branch pipelines (3), multiple branch pipelines (3) are connected in parallel on the main pipeline (2) for injecting liquid into each injection hole, and branch control valves (4) and branch pump bodies (5) are connected in series on the branch pipelines (3); The control terminal collects the pressure data of the main pipeline (2) and the pressure data of the branch pipeline (3). The control terminal obtains the detection pressure based on the difference between the pressure data of the main pipeline (2) and the pressure data of the branch pipeline (3). The control terminal collects the flow data of the branch pipeline (3). The control terminal obtains the detection flow based on the flow data of the branch pipeline (3). When the detected pressure is greater than the preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal regulates the branch pump body (5) so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline (3) are within the target range.

2. The flow control device for a branch pipeline in acid leaching as described in claim 1, characterized in that, A first pressure gauge (6) is installed on the main pipeline (2). The first pressure gauge (6) is electrically connected to the control terminal. The first pressure gauge (6) is used to detect the pressure data of the main pipeline (2).

3. The flow control device for a branch pipeline in acid leaching as described in claim 1, characterized in that, A main pump body (7) and a main control valve (8) are sequentially connected in series on the main pipeline (2) and between the liquid collection tank (1) and the first pressure gauge (6). The main pump body (7) and the main control valve (8) are electrically connected to the control terminal.

4. The flow control device for a branch pipeline in acid leaching as described in claim 3, characterized in that, A branch flow meter (9) and a branch pressure gauge (10) are sequentially installed on the branch pipeline (3) and located in the direction of the outlet of the branch pump body (5). The branch flow meter (9) and the branch pressure gauge (10) are electrically connected to the control terminal. The branch flow meter (9) is used to detect the flow data of the branch pipeline (3), and the branch pressure gauge (10) is used to detect the pressure data of the branch pipeline (3).

5. The flow control device for a branch pipeline in acid leaching according to claim 4, characterized in that, A branch check valve (11) is provided between the branch flow meter (9) and the branch pressure gauge (10).

6. The flow control device for a branch pipeline in acid leaching as described in claim 1, characterized in that, The number of branch pipes (3) is at least two.

7. A method for independent flow control of branch pipelines in acid leaching, employing the flow control device for branch pipelines in acid leaching as described in any one of claims 1 to 6, characterized in that, include: S1. Liquid is injected into each of the branch pipes (3) through the main pipe (2) to ensure that the flow rate discharged from each of the branch pipes (3) is balanced; S2. The control terminal collects the pressure of the main pipeline (2) and the flow rate and pressure of each branch pipeline (3) in real time. The control terminal obtains the detection pressure based on the difference between the pressure data of the main pipeline (2) and the pressure data of the branch pipeline (3). The control terminal collects the flow rate data of the branch pipeline (3) and obtains the detection flow rate based on the flow rate data of the branch pipeline (3). S3, when the detected pressure is greater than the preset pressure threshold or the detected flow rate is less than the preset flow rate threshold, the control terminal regulates the branch pump body (5) so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline (3) are within the target range.

8. The independent flow control method for branch pipelines in acid leaching according to claim 7, characterized in that, Liquid is injected into each of the branch pipes (3) through the main pipe (2) to ensure that the flow rate discharged from each of the branch pipes (3) is balanced, including: S11. Start the main pump body (7), open the main control valve (8) on the main pipeline (2) and the branch control valve (4) on each branch pipeline (3) so that the liquid in the collection tank (1) enters each branch pipeline (3) through the main pipeline (2); S12. The control terminal collects the values ​​detected by the first pressure gauge (6) on the main pipeline (2) and the values ​​detected by the branch pressure gauge (10) and the branch flow meter (9) on each branch pipeline (3) in real time, and adjusts the branch control valve (4) through the control terminal to make the initial discharge flow of each branch pipeline (3) equal.

9. The independent flow control method for branch pipelines in acid leaching according to claim 7, characterized in that, When the detected pressure is greater than a preset pressure threshold or the detected flow rate is less than a preset flow rate threshold, the control terminal regulates the branch pump body (5) to ensure that the flow rate and pressure of the liquid injected into the corresponding injection port by each branch pipeline (3) are within the target range, including: S31. When the detected pressure is greater than the preset pressure threshold, the control terminal adjusts the output power of the branch pump body (5) on the corresponding branch pipeline (3) so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline (3) are within the target range. S32. When the detected flow rate is less than the preset flow rate threshold, the control terminal regulates the branch pump body (5) on the corresponding branch pipeline (3) to start the pump frequency continuous compensation mechanism so that the flow rate and pressure of the liquid injected into the corresponding injection hole by each branch pipeline (3) are within the target range.

10. The independent flow control method for branch pipelines in acid leaching according to claim 9, characterized in that, The target range is that the real-time injection flow rate of each branch pipeline (3) is maintained within ±5% of the preset target flow rate value, while the pressure fluctuation of each branch pipeline (3) does not exceed 0.1 MPa.

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