Hydrometallurgical sampling and sample preparation system

Abstract

The invention discloses a hydrometallurgical sampling and sample preparation system, comprising a liquid tank, a sampling bottle, a negative pressure sampling structure and a sample preparation system, wherein the liquid tank is connected to the sampling bottle via a valve-free controlled sampling pipeline, the sampling bottle is respectively connected to the negative pressure sampling structure and the sample preparation system, the negative pressure sampling structure is used to draw negative pressure in the sampling bottle so that the liquid in the liquid tank enters the sampling bottle and is mixed and diluted with a diluent, and the sample preparation system is used to extract the mixed sample liquid in the sampling bottle for sample preparation; this embodiment of the invention implements sampling and sample preparation synchronously, thereby realizing original sample analysis, avoiding crystallization and contamination of the liquid during the transfer process, resulting in changes in the properties of the liquid, thereby affecting the accuracy and reliability of the detection results.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical sampling, in particular to a hydrometallurgical sampling and sample preparation system. Background Art

[0002] During the hydrometallurgical process, monitoring of process parameters that affect hydrometallurgical process indicators is an essential step in the production process, especially the analysis of ion content and impurities in the solution. Impurity elements in some industrial process control techniques will have a great impact on the entire electrolysis system, thereby affecting the use of the product; the technical difficulty in achieving stable operation of automated monitoring of metallurgical process solutions lies in the difficulty in sampling the feed liquid, which is specifically manifested in the high feed liquid temperature and the supersaturated metal ion concentration in the hydrometallurgical process. After sampling, crystals precipitate due to the decrease in feed liquid temperature, which is easy to generate a self-organized structure system of solution crystals, and the pipeline is easily adsorbed and blocked, causing difficulties in pipeline cleaning. In the prior art, some sampling equipment mainly uses automatic cleaning methods to reduce the blockage of the pipeline by the feed liquid, but this method only reduces the maintenance amount and cannot fundamentally solve the actual problem of feed liquid sampling, especially when an electronic control device such as a valve or a pump is provided in the sampling pipeline. During the sampling process, the electronic control device is easily blocked and corroded due to long-term direct contact with the feed liquid, resulting in failure, affecting normal automatic monitoring and analysis, and increasing the operating cost; and there are also technical problems in the prior art such as complex pipeline systems, difficult cleaning and maintenance, large dilution errors of high-concentration samples, and low automation. Summary of the invention

[0003] The present invention provides a hydrometallurgical sampling and sample preparation system to solve the technical problem that the liquid in the existing sampling equipment flows through the sampling pump and / or the sampling valve, causing the sampling pump and / or the sampling valve to malfunction. According to one aspect of the present invention, a hydrometallurgical sampling and sample preparation system is provided.

[0004] It includes liquid tank, sampling bottle, negative pressure sampling structure and sample preparation system.

[0005] The liquid tank is connected to the sampling bottle via a valve-free controlled sampling pipeline, and the sampling bottle is connected to the negative pressure sampling structure and the sample preparation system respectively.

[0006] The negative pressure sampling structure is used to draw negative pressure into the sampling bottle so that the liquid in the liquid tank enters the sampling bottle and is mixed and diluted with the diluent. The sample preparation system is used to extract the mixed sample liquid in the sampling bottle for sample preparation.

[0007] Furthermore, the hydrometallurgical sampling and sample preparation system also includes a pressurizing structure connected to the sampling bottle, and the pressurizing structure is used to increase the pressure in the sampling bottle to discharge the sample liquid in the sampling bottle and / or push the residual liquid in the valveless sampling pipeline back to the liquid tank.

[0008] Furthermore, the negative pressure sampling structure and the boosting structure are both integrated in a forward and reverse pump, and the forward and reverse pump is connected to the sampling bottle. The forward and reverse pump rotates forward to draw negative pressure into the sampling bottle, and the forward and reverse pump rotates reversely to boost pressure in the sampling bottle.

[0009] Furthermore, the pipe opening at one end of the valveless sampling pipe connected to the sampling bottle is higher than the liquid level in the sampling bottle.

[0010] Furthermore, the sampling bottle is also connected to a sample discharge valve, and the outer end of the sample discharge valve is connected to a sample discharge port.

[0011] Furthermore, a pressure valve is installed on the sampling bottle.

[0012] Furthermore, the sample preparation system comprises a quantitative sampling device and a diluting device, wherein the quantitative sampling device is used to quantitatively take out the sample liquid from the sampling bottle, and the diluting device is used to provide pure water to mix and dilute the quantitatively taken out sample liquid.

[0013] Furthermore, the quantitative sampling device includes an analyzer, a quantitative ring, a first solenoid valve connected to the first end of the quantitative ring, and a second solenoid valve connected to the second end of the quantitative ring. The quantitative ring is used to quantitatively collect sample liquid. The first solenoid valve and the second solenoid valve are used to control the opening and closing of the quantitative ring. The analyzer includes an analysis device and a power device. The power device is used to provide power to extract the sample liquid in the sampling bottle into the quantitative ring. The dilution device is used to dilute the sample liquid in the quantitative ring for sample preparation. The analyzer is used to analyze the sample liquid diluted by the dilution device.

[0014] Furthermore, the dilution device includes a liquid supply device and a dilution bottle, the liquid supply device is connected to the first solenoid valve, and the dilution bottle is connected to the second solenoid valve. Water is supplied to the quantitative ring through the liquid supply device to drive the sample liquid in the quantitative ring into the dilution bottle for dilution.

[0015] Further, the first solenoid valve and the second solenoid valve are both three-way solenoid reversing valves, the first end of the first solenoid valve is connected to the sampling bottle, the second end of the first solenoid valve is connected to the quantitative ring, the third end of the first solenoid valve is connected to the liquid supply device, and the first solenoid valve is used to switchably control the connection relationship between the sampling bottle, the quantitative ring and the liquid supply device; the first end of the second solenoid valve is connected to the quantitative ring, the second end of the second solenoid valve is connected to the analyzer, and the third end of the second solenoid valve is connected to the dilution bottle, and the second solenoid valve can switchably control the connection relationship between the quantitative ring, the analyzer and the dilution bottle.

[0016] The present invention has the following beneficial effects:

[0017] 1. By setting a sampling structure (sampling bottle, negative pressure sampling structure) connected to the sample preparation system, sampling and sample preparation are carried out simultaneously to achieve original sample analysis, avoid crystallization and contamination of the feed liquid during the transfer process, which will cause the properties of the feed liquid to change (such as changes in the composition or concentration of the feed liquid), thereby affecting the accuracy and reliability of the test results; and the feed liquid is extracted by negative pressure sampling. During the extraction process, the feed liquid does not need to flow through the sampling pump and / or valve, but directly enters the sampling bottle through the valve-free sampling pipeline, which can avoid corrosion and blockage caused by crystallization and scaling of the feed liquid in the valve or sampling pump, which is beneficial to reduce the cleaning and maintenance workload of the entire sampling system. Even if the valve-free sampling pipeline is blocked, it only needs to be replaced. The operation is simple and the cost is low. Compared with the cleaning and maintenance of the sampling pump and valve in the prior art, the workload is greatly reduced, which has obvious advantages.

[0018] 2. By controlling the reversal of the first solenoid valve and the second solenoid valve, different components are interconnected so that the device has different usage states to achieve different functions. The first state is: the first solenoid valve is used alone to control the liquid supply device to be connected to the sampling bottle, so that the liquid supply device provides a quantitative diluent to the sampling bottle. After the liquid supply is completed, the channel is closed so that the diluent can be fully mixed with the subsequent liquid entering the sampling bottle to achieve the purpose of the first dilution; the second state is: when the first solenoid valve is controlled to switch to connect the sampling bottle with the quantitative ring, and the second solenoid valve is switched to connect the quantitative ring with the analyzer, the power device in the analyzer provides suction force to extract sample liquid from the sampling bottle to fill the quantitative ring, thereby realizing the function of quantitatively extracting sample liquid from the sampling bottle; state The third state is: when the first solenoid valve is controlled to switch to connect the liquid supply device with the quantitative ring, the second solenoid valve connects the quantitative ring with the dilution bottle, and the diluent is pumped out through the liquid supply device to send the sample liquid filled in the quantitative ring into the dilution bottle for a second dilution, so as to achieve the purpose of sample preparation, further ensure the quality of sample preparation of this device, and provide it for detection by the analyzer; the fourth state is: the second solenoid valve is controlled separately to connect the analyzer with the dilution bottle, and the fully diluted sample liquid is extracted from the dilution bottle through the power device in the analyzer for sample analysis, so as to obtain accurate results of sample analysis; the fifth state is, the ports of the first solenoid valve and the second solenoid valve are controlled to be open, and the diluent is provided through the liquid supply device to thoroughly clean the entire system to prevent blockage. By controlling the reversing of the first solenoid valve and the second solenoid valve, the above-mentioned five usage states can be achieved and corresponding functions can be realized. This design simplifies the pipeline design, realizes the automated control process of sampling, sample preparation and sample analysis, and improves work efficiency; it solves the technical problems of the existing sampling, sample preparation and sample analysis devices being bulky and bloated after integration and the extremely complex control process; and the above-mentioned states of the device are progressive and interconnected, the control process is concise and clear, and is easy to implement and easy to control, which is conducive to improving the overall automated control efficiency of the device.

[0019] 3. This device uses a two-stage dilution of the feed liquid to ensure the good quality of the prepared sample liquid. During the first stage of dilution, the feed liquid is extracted into the sampling bottle by negative pressure sampling, so that the feed liquid that has not been diluted will not flow through the sampling pump and / or valve, and the sampling pump and valve will not be blocked due to the crystallization of the feed liquid, which can reduce the workload of frequent repair and maintenance of the sampling pipeline. The subsequent use of the second-stage dilution method to dilute and prepare the feed liquid that has been diluted once is conducive to improving the accuracy and reliability of the subsequent analysis results of the sample liquid, and the sample liquid that has been diluted once will greatly reduce the occurrence of valve blockage when it flows through the solenoid valve and valve.

[0020] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0023] Description of Figure Numbers:

[0024] 1. Liquid tank; 2. Sampling bottle; 3. Forward and reverse pump; 4. Quantitative sampling device; 5. Dilution device;

[0025] 21. Sampling pipeline without valve control; 22. Sampling valve; 23. Pressure valve;

[0026] 41. Analyzer; 42. Quantitative loop; 43. First solenoid valve; 44. Second solenoid valve;

[0027] 51. Liquid supply device; 52. Dilution bottle. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0029] like Figure 1As shown, a preferred embodiment of the present invention provides a hydrometallurgical sampling and sample preparation system, including a liquid tank 1, a sampling bottle 2, a sampling power unit and a sample preparation system, wherein the liquid tank 1 is connected to the sampling bottle 2 through a valveless sampling pipe 21, and the connection point between the valveless sampling pipe 21 and the sampling bottle 2 is higher than the liquid level in the sampling bottle 2, so as to prevent the liquid in the sampling bottle 2 from flowing back into the liquid tank 1, and the sampling bottle 2 is connected to the sampling power unit, and the sampling bottle 2 is connected to the sample preparation system. The sampling power unit includes a negative pressure sampling structure and / or a pressurization structure, wherein the negative pressure sampling structure is used to extract negative pressure from the inside of the sampling bottle 2 so that the liquid in the liquid tank 1 enters the sampling bottle 2 and mixes with the diluent, wherein the diluent can be pure water, a buffer solution or a corresponding dilute acid, dilute alkali or other solution, and before sampling the liquid, a set amount of diluent is pre-taken in the sampling bottle to ensure that the liquid entering the sampling bottle is diluted and does not precipitate. The boosting structure is used to increase the pressure in the sampling bottle 2 so as to discharge the residual liquid in the valve-free controlled sampling pipe 21 connecting the liquid tank 1 and the sampling bottle 2 back into the liquid tank 1, thereby preventing the liquid from crystallizing and scaling in the valve-free controlled sampling pipe. Moreover, through this negative pressure sampling method, there is no electronic control device in the valve-free controlled sampling pipe 21, that is, the liquid does not need to flow through the sampling pump and / or valve, so that the liquid is not in contact with the sampling pump and / or valve during the sampling process, thereby avoiding the valve or sampling pump from malfunctioning due to long-term contact with the liquid, thereby affecting the normal automatic sampling, monitoring and analysis of the industrial process. In addition, the maintenance workload of the entire sampling system is reduced, and the operating cost of the system is reduced; the sample preparation system is used to extract the mixed sample liquid in the sampling bottle 2 for use as sample preparation, so that sampling and sample preparation can be implemented simultaneously, and original sample analysis is achieved. It can be seen that this system does not need to transfer the feed liquid after the sampling is completed before sample preparation and analysis, so as to avoid crystallization and contamination during the transfer of the feed liquid, which will cause changes in the properties of the feed liquid (such as changes in the composition or concentration of the feed liquid), thereby affecting the accuracy and reliability of the test results.

[0030] Optionally, a heating and / or insulation module is provided on the valveless sampling pipe 21 to prevent crystallization of the slurry due to temperature reduction, so as to further ensure that the valveless sampling pipe 21 will not be blocked by the precipitation of crystal particles; preferably, the sampling bottle 2 can also be provided with a heating and / or insulation module so that it has heating and / or insulation functions.

[0031] The sampling bottle 2 is provided with a sample discharge port, and the sample discharge port is provided with a sample discharge valve 22, through which the sample discharge valve 22 and the sample discharge port can discharge the sample liquid in the sampling bottle 2. Further, the sample discharge port is arranged at the bottom of the sampling bottle, so as to discharge the liquid in the sampling bottle cleanly and avoid residue.

[0032] Preferably, the sampling power unit is a forward and reverse pump 3, which realizes the function of the negative pressure sampling structure when rotating forward, that is, draws negative pressure into the sampling bottle 2 so that the liquid in the liquid tank 1 enters the sampling bottle 2; the forward and reverse pump realizes the function of the boosting structure when reversing, that is, boosts the pressure in the sampling bottle 2 so that the liquid in the valveless sampling pipe 21 is discharged back into the liquid tank, and when the discharge valve 22 is opened, the excess sample liquid in the sampling bottle 2 can also be discharged due to the boosting in the sampling bottle 2. The setting of the forward and reverse pump avoids the need for multiple power sources to achieve the purpose of boosting and drawing negative pressure, thereby making the structure of the device more compact and the control process simpler.

[0033] Preferably, a liquid level sensor assembly is installed in the sampling bottle 2 for quantifying the liquid in the sampling bottle 2; further, the liquid level sensor assembly includes at least two liquid level sensors; specifically, the diluent enters the sampling bottle through the power system, and at least one liquid level sensor (liquid level one) is used to determine whether the diluent entering the sampling bottle reaches a predetermined amount. This step is to pre-prepare the diluent; after the pre-prepared diluent enters the sampling bottle, negative pressure is drawn in the sampling bottle, and the feed liquid in the feed liquid tank enters the sampling bottle due to the negative pressure. When the liquid volume in the sampling bottle reaches liquid level two, the forward and reverse pump is reversed, and the feed liquid in the valve-free sampling pipeline is pressed back to the feed liquid tank 1 in a positive pressure manner to control the liquid level height in the sampling bottle to a preset value.

[0034] A pressure valve 23 can also be installed on the sampling bottle 2. When the sample liquid in the sampling bottle 2 reaches a specified liquid level, the sampling power unit can be controlled to stop extracting negative pressure and open the pressure valve 23 to make the pressure in the sampling bottle 2 reach normal pressure.

[0035] like Figure 1 As shown, the sample preparation system includes a quantitative sampling device 4 and a diluting device 5. The quantitative sampling device 4 is used to quantitatively take out the mixed sample liquid from the sampling bottle 2, and the diluting device 5 is used to provide a diluent to mix and dilute the sample liquid in the sampling bottle quantitatively taken out by the quantitative sampling device 4, so as to further dilute the feed liquid to achieve the purpose of sample preparation for detection by the analyzer 41.

[0036] Furthermore, the quantitative sampling device 4 includes an analyzer 41, a quantitative ring 42, a first solenoid valve 43 connected to the first end of the quantitative ring 42, and a second solenoid valve 44 connected to the second end of the quantitative ring 42. The analyzer 41 includes an analysis device and a power device. The other end of the first solenoid valve 43 is connected to the sampling bottle 2. When it is necessary to extract the sample liquid in the sampling bottle 2, the first solenoid valve 43 is opened, and the power device provides power to extract the sample liquid in the sampling bottle 2 into the quantitative ring 42 and fill the quantitative ring 42. Then the first solenoid valve 43 is closed to quantitatively collect the sample liquid. The power device can be a suction pump for extracting the sample liquid. The dilution device 5 dilutes the quantitative sample liquid for sample preparation. Finally, the analyzer 41 analyzes the sample liquid after the dilution and sample preparation by the dilution device 5 is completed, so that sampling, sample preparation and analysis are systematized without the need for step-by-step implementation, thereby improving the efficiency of sampling, sample preparation and sample analysis, avoiding the deterioration phenomenon that may occur during the material and liquid transfer process, and ensuring the accuracy of the analysis results.

[0037] The dilution device 5 includes a liquid supply device 51 and a dilution bottle 52. The liquid supply device 51 is connected to the first solenoid valve 43, and the dilution bottle 52 is connected to the second solenoid valve 44. The liquid supply device 51 supplies liquid to the quantitative ring 422 to drive the sample liquid filled in the quantitative ring 42 into the dilution bottle 52 for dilution.

[0038] Furthermore, the first solenoid valve 43 and the second solenoid valve 44 are both three-way solenoid reversing valves, the first end of the first solenoid valve 43 is connected to the sampling bottle 2, the second end of the first solenoid valve 43 is connected to the quantitative ring 42, and the third end of the first solenoid valve 43 is connected to the liquid supply device 51. Through the reversing function of the first solenoid valve 43, the sampling bottle 2, the quantitative ring 42 and the dilution device 5 can be switched to be connected in pairs; the first end of the second solenoid valve 44 is connected to the quantitative ring 42, the second end of the second solenoid valve 44 is connected to the analyzer 41, and the third end of the second solenoid valve 44 is connected to the dilution bottle 52. Through the reversing function of the second solenoid valve 44, the quantitative ring 42, the analyzer 41 and the dilution device 5 can be connected in pairs.

[0039] By controlling the reversal of the first solenoid valve 43 and the second solenoid valve 44, different components are interconnected so as to have different usage states to realize different functions. The first state is: the first solenoid valve 43 is used alone to control the liquid supply device 51 to be connected to the sampling bottle 2, so that the liquid supply device 51 quantitatively provides diluent to the sampling bottle 2, and the channel is closed after the liquid supply is completed, so that the diluent can be fully mixed with the subsequent liquid entering the sampling bottle 2 to achieve the purpose of the first dilution (the other ports of the three-way solenoid reversing valve can be defaulted to the closed state when not specified); the second state is: when the first solenoid valve 43 is controlled to switch to connect the sampling bottle 2 with the quantitative ring 42, and the second solenoid valve 44 is switched to connect the quantitative ring 42 with the analyzer 41, the power device in the analyzer 41 provides power to extract sample liquid from the sampling bottle 2 to fill the quantitative ring 42, thereby realizing the function of quantitative sampling; The third state is: when the first solenoid valve 43 is controlled to switch to connect the liquid supply device 51 with the quantitative ring 42, the second solenoid valve 44 connects the quantitative ring 42 with the dilution bottle 52, and the diluent is pumped out through the liquid supply device 51 to send the sample liquid filled in the quantitative ring 42 into the dilution bottle 52 for a second dilution, so as to achieve the purpose of sample preparation, further ensure the quality of sample preparation of this device, and meet the detection requirements of the analyzer; the fourth state is: the second solenoid valve 44 is controlled separately to connect the analyzer 41 with the dilution bottle 52, and the power device in the analyzer 41 is used to extract the fully diluted sample liquid from the dilution bottle 52 for sample analysis to obtain accurate results of the sample analysis; the fifth state is to control the ports of the first solenoid valve 43 and the second solenoid valve 44 to be opened, and the dilution liquid is provided through the liquid supply device 51 to thoroughly clean the entire system to prevent blockage. By controlling the reversing of the first solenoid valve 43 and the second solenoid valve 44, the above-mentioned five usage states can be achieved and corresponding functions can be realized. This design simplifies the pipeline design, realizes the automated control process of sampling, sample preparation and sample analysis, and improves work efficiency; it solves the technical problems of the existing sampling, sample preparation and sample analysis devices being bulky and bloated after integration, and the extremely complex control process; and the above-mentioned states of the device are progressive and interconnected, the control process is concise and clear, easy to implement and easy to control, which is conducive to improving the overall automated control efficiency of the device.

[0040] It is worth mentioning that the present device adopts a two-stage dilution of the feed liquid to ensure the good quality of sample preparation. During the first stage of dilution, the feed liquid is extracted into the sampling bottle 2 by negative pressure sampling, so that the feed liquid that has not been diluted will not flow through the sampling pump and valve, that is, there is no contact between the feed liquid and the pump and valve, so the sampling pump and valve will not be blocked due to the crystallization of the feed liquid, which can reduce the workload of frequent maintenance of the sampling pipeline. Even if the sampling pipeline 21 without valve control is blocked due to excessive crystallization of the feed liquid, the user only needs to replace the sampling tube, which is low in cost and simple in operation, and has great advantages over the prior art. The subsequent use of the second-stage dilution method to dilute and prepare the feed liquid that has been diluted once is conducive to improving the accuracy and reliability of the subsequent analysis results of the sample liquid.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, 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 hydrometallurgical sampling and sample preparation system, characterized in that: include: A liquid tank (1), a sampling bottle (2), a negative pressure sampling structure and a sample preparation system, The liquid tank (1) is connected to the sampling bottle via a valve-free controlled sampling pipeline (21), and the sampling bottle (2) is connected to the negative pressure sampling structure and the sample preparation system respectively. The negative pressure sampling structure is used to draw negative pressure into the sampling bottle (2) so that the liquid in the liquid tank (1) enters the sampling bottle (2) and is mixed and diluted with the diluent, and the sample preparation system is used to extract the mixed sample liquid in the sampling bottle (2) for sample preparation; The sample preparation system comprises a quantitative sampling device (4) and a dilution device (5); The quantitative sampling device (4) comprises an analyzer (41), a quantitative ring (42), a first solenoid valve (43) connected to a first end of the quantitative ring (42), and a second solenoid valve (44) connected to a second end of the quantitative ring (42); the quantitative ring (42) is used to quantitatively collect sample liquid; the first solenoid valve (43) and the second solenoid valve (44) are used to control the opening and closing of the quantitative ring (42); the analyzer (41) comprises an analysis device and a power device; the power device is used to provide power to extract the sample liquid in the sampling bottle (2) into the quantitative ring (42); the diluting device (5) is used to dilute the sample liquid in the quantitative ring (42) for sample preparation; and the analyzer (41) is used to analyze the sample liquid diluted by the diluting device (5); The dilution device (5) comprises a liquid supply device (51) and a dilution bottle (52), wherein the liquid supply device (51) is connected to the first solenoid valve (43), and the dilution bottle (52) is connected to the second solenoid valve (44), and liquid is supplied to the quantitative ring (42) through the liquid supply device (51) so that the sample liquid in the quantitative ring (42) is driven by the dilution liquid to enter the dilution bottle (52) for dilution; The first solenoid valve (43) and the second solenoid valve (44) are both three-way solenoid reversing valves; a first end of the first solenoid valve (43) is connected to the sampling bottle (2), a second end of the first solenoid valve (43) is connected to the quantitative ring (42), and a third end of the first solenoid valve (43) is connected to the liquid supply device (51); the first solenoid valve (43) is used to switchably control the communication relationship between the sampling bottle (2), the quantitative ring (42) and the liquid supply device (51); a first end of the second solenoid valve (44) is connected to the quantitative ring (42), a second end of the second solenoid valve (44) is connected to the analyzer (41), and a third end of the second solenoid valve (44) is connected to the dilution bottle (52); the second solenoid valve (44) is used to switchably control the communication relationship between the quantitative ring (42), the analyzer (41) and the dilution bottle (52).

2. A hydrometallurgical sampling and sample preparation system according to claim 1, characterized in that: The hydrometallurgical sampling and sample preparation system also includes a pressurizing structure connected to the sampling bottle (2), and the pressurizing structure is used to increase the pressure in the sampling bottle (2) to discharge the sample liquid in the sampling bottle (2) and / or push the residual liquid in the valveless sampling pipeline (21) back to the liquid tank (1).

3. A hydrometallurgical sampling and sample preparation system according to claim 2, characterized in that: The negative pressure sampling structure and the pressurization structure are both integrated in a sampling power unit. The sampling power unit is a forward and reverse pump (3). The forward and reverse pump (3) is connected to the sampling bottle (2). The forward and reverse pump (3) rotates forward to draw negative pressure into the sampling bottle (2). The forward and reverse pump (3) rotates reversely to increase the pressure in the sampling bottle (2).

4. A hydrometallurgical sampling and sample preparation system according to claim 1, characterized in that: The pipe opening at one end of the valveless sampling pipe (21) connected to the sampling bottle (2) is higher than the liquid level in the sampling bottle (2).

5. A hydrometallurgical sampling and sample preparation system according to claim 1, characterized in that: The sampling bottle (2) is also connected to a sample discharge valve (22), and the outer end of the sample discharge valve (22) is connected to a sample discharge port.

6. A hydrometallurgical sampling and sample preparation system according to claim 1, characterized in that: A pressure valve (23) is installed on the sampling bottle (2).

7. A hydrometallurgical sampling and sample preparation system according to any one of claims 1 to 6, characterized in that: The quantitative sampling device (4) is used to quantitatively take out the sample liquid from the sampling bottle (2), and the diluting device (5) is used to provide diluent to mix and dilute the quantitatively taken out sample liquid.

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