XRF (X-Ray Fluorescence) detection system for solution

Abstract

The invention relates to the technical field of solution detection, in particular to an XRF detection system for a solution. The device comprises a detection pool, the top of the detection pool is provided with a detection opening communicated with a detection cavity in the detection pool, an emitter and a detector are arranged right above the detection pool, and an irradiation path of the emitter and a receiving path of the detector are symmetrically distributed along a plumb line and both avoid the pool wall of the detection pool. The liquid level surface of detection liquid in the detection cavity during detection of the XRF detection system is used as a detection liquid level surface, and the intersection of the irradiation path and the receiving path is located at the detection liquid level surface. The detection result is not interfered by a medium, and the detection accuracy is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of solution detection, in particular to an XRF detection system for a solution. Background Art

[0002] XRF detection technology, also known as X-ray fluorescence detection technology, is a non-destructive testing technology. This technology is mainly used in geology, metallurgy, environment, archaeology and other fields, and is less used in the field of liquid detection.

[0003] When the liquid is detected by the XRF detection device, the liquid needs to be stored in a transparent container, and the ray emitting device and the detector are arranged beside the container, so that a layer of transparent medium is formed between the ray emitting device and the liquid and between the detector and the solution, which is called a transparent medium. As described in the text of a liquid sample XRF measurement device with the Chinese patent publication number CN213364634U, a closed shell is provided for storing the test sample, and a transmitter and a receiver are arranged beside the closed shell. The transparent medium currently has the following problems. First, the corrosion resistance of the transparent medium, the transmittance of X-rays, the deformation, breakage and aging of the medium will affect the transmittance of X-fluorescence, and thus affect the detection results. Secondly, bubbles will adhere to the surface of the transparent medium, and the adhesion of bubbles will directly affect the detection results.

[0004] In addition, in order to allow the detector to stably receive the rays reflected in the solution, a fluorescent transparent medium made of special materials such as Mylar film or gold paper will be set at the intersection of the ray emitting device and the detector in the solution. The above-mentioned sample membranes for making fluorescent transparent media do not have good mechanical strength, corrosion resistance and sealing. Currently, the existing solution online XRF analysis equipment on the market all adopt this structure. This structure has problems such as deformation, corrosion, aging, and breakage, which will affect the detection stability and accuracy. There is also a safety risk of rupture.

[0005] In summary, when the existing XRF detection device detects liquid solutions, the problem of insufficient detection accuracy will occur due to wear, corrosion, aging and other problems of the transparent medium of the transparent container and the fluorescent transparent medium in the solution, which needs to be solved urgently. Summary of the invention

[0006] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides an XRF detection system for a solution, which has no medium interfering with the detection result and effectively improves the accuracy of the detection.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A solution XRF detection system comprises a detection pool, wherein the top of the detection pool is provided with a detection opening connected to an internal detection cavity thereof, an emitter and a detector are arranged directly above the detection pool, an irradiation path of the emitter and a receiving path of the detector are symmetrically distributed along a plumb line and both avoid the pool wall of the detection pool, and the liquid level surface of the detection liquid in the detection cavity during detection by the XRF detection system is taken as the detection liquid level surface, and the intersection point of the irradiation path and the receiving path is located at the detection liquid level surface.

[0009] As a further solution of the present invention: the inner cavity of the detection pool is divided by a partition to form a detection cavity and an overflow cavity arranged horizontally adjacent to each other, and the partition is provided with an overflow port connecting the detection cavity and the overflow cavity, and the overflow liquid level surface of the overflow port constitutes the detection liquid level surface.

[0010] As a further solution of the present invention: the bottom of the detection chamber is connected to the detection liquid storage mechanism through a detection liquid circulation pipeline, and a second pump P2 is installed on the detection liquid circulation pipeline. The second pump P2 is a bidirectional pump. When the delivery direction of the second pump P2 is switched, the detection liquid can be respectively input into the detection chamber and the detection liquid in the detection chamber can be recovered; the overflow chamber is connected to the detection liquid storage mechanism through a recovery pipeline, and a fifth pump P5 for delivering detection liquid to the detection liquid storage mechanism is installed on the recovery pipeline.

[0011] As a further solution of the present invention: the detection liquid storage mechanism includes a closed-loop circulation pipeline, along the circulation direction of the detection liquid in the circulation pipeline, the detection liquid tank, the first pump P1, the filter assembly and the circulation cup are arranged in sequence on the circulation pipeline, the detection liquid circulation pipeline is connected to the circulation cup, and the recovery pipeline is connected to the detection liquid tank.

[0012] As a further solution of the present invention: the detection liquid circulation pipeline is branched through the second two-position three-way reversing valve BV2 to form a liquid inlet and liquid return branch and a first waste branch, the second pump P2 is installed on the liquid inlet and liquid return branch, the liquid inlet and liquid return branch is connected to the detection liquid storage mechanism, the first waste branch is connected to the waste liquid tank, and the first waste branch is installed with a third pump P3 for discharging liquid into the waste liquid tank.

[0013] As a further solution of the present invention: the recovery pipeline is branched through the third two-position three-way reversing valve BV3 to form a recovery branch pipe and a second waste branch pipe, the fifth pump P5 is installed on the recovery branch pipe, the recovery branch pipe is connected to the detection liquid storage mechanism, the second waste branch pipe is connected to the waste liquid tank, and the second waste branch pipe is installed with a fourth pump P4 for discharging liquid into the waste liquid tank.

[0014] As a further solution of the present invention: the detection chamber is connected to the clean water tank through a cleaning pipeline, and a sixth pump P6 for conveying clean water to the detection chamber is installed on the cleaning pipeline.

[0015] As a further solution of the present invention: the circulation pipeline is also equipped with a first two-position three-way reversing valve BV1, and the first two-position three-way reversing valve BV1 is located between the detection liquid tank and the first pump P1. The first pump P1 is respectively connected to the detection liquid tank and the waste liquid tank through the first two-position three-way reversing valve BV1. The first pump P1 is a bidirectional pump. When the delivery direction of the first pump P1 is switched, the detection liquid in the detection liquid tank can be extracted and the waste liquid can be delivered to the waste liquid tank.

[0016] As a further solution of the present invention: the irradiation path and the receiving path are distributed vertically.

[0017] As a further solution of the present invention: it includes an air supply module located directly above the emitter and the detector and supplying air vertically, and also includes an air exhaust module located on both sides of the emitter and the detector and exhausting air to both sides.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The intersection of the irradiation path of the transmitter and the receiving path of the detector is located at the detection liquid level surface, and the irradiation path and the receiving path are symmetrically distributed along the plumb line, so that the rays emitted by the transmitter can be stably reflected to the detector through the horizontal detection liquid level surface. The detection liquid level surface is used as the fluorescent transmission medium. Compared with the traditional fluorescent transmission medium made of special materials such as Mylar film or gold paper, there will be no problems such as corrosion, aging, and damage, which improves the stability and accuracy of the detection.

[0020] In addition, a detection opening is provided at the top of the detection pool, the emitter and the detector are located directly above the detection pool, and both the irradiation path and the receiving path avoid the pool wall of the detection pool. This ensures that there is no interference from the penetrating medium between the emitter and the detection liquid, and between the detector and the detection liquid, and avoids the problem of insufficient detection stability and accuracy caused by the characteristics of the penetrating medium itself and the attachment of bubbles to the surface of the penetrating medium.

[0021] 2. The inner cavity of the detection pool is divided by a partition to form a detection cavity and an overflow cavity arranged horizontally adjacent to each other. The partition is provided with an overflow port connecting the detection cavity and the overflow cavity, and the detection liquid overflowing from the detection cavity is collected through the overflow cavity. Since the overflow liquid level surface of the overflow port constitutes the detection liquid level surface, when the solution is transported into the detection cavity until the detection liquid flows from the overflow port to the overflow cavity, the liquid level of the detection liquid is adjusted to the detection liquid level surface, thereby realizing the rapid and accurate adjustment of the liquid level surface of the detection liquid in the detection cavity to the detection liquid level surface.

[0022] 3. A pipeline structure is provided for conveying and recovering the detection liquid into the detection chamber and the overflow chamber, so as to realize automated detection operation.

[0023] 4. A cleaning pipeline is provided for cleaning the detection chamber and the overflow chamber to prevent liquid crystallization in the detection pool.

[0024] 5. The air supply module and the exhaust module are set up to dissipate the heat of the transmitter and prevent corrosive gases from corroding the transmitter and detector, effectively improving the reliability of the long-term stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the emitter, detector and detection cell in the present invention.

[0026] Figure 2 It is a schematic diagram of the pipeline connection structure on the detection pool in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the present invention.

[0028] In the figure: 10, emitter; 20, detector; 30, detection pool; 31, detection chamber; 32, overflow chamber; 33, partition; 40, cleaning pipeline; 41, clean water tank; 50, detection liquid circulation pipeline; 51, liquid inlet and return branch pipe; 52, first row waste branch pipe; 60, recovery pipeline; 61, second row waste branch pipe; 62, recovery branch pipe; 70, circulation pipeline; 71, detection liquid tank; 72, filter assembly; 73, circulation cup; 80, waste liquid tank; 91, air supply module; 92, exhaust module. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For ease of understanding, the specific structure and working mode of the present invention are further described below in conjunction with the accompanying drawings:

[0031] The specific structure of the present invention refers to Figure 1-3As shown, its main structure includes a detection pool 30 and an emitter 10 and a detector 20 arranged just above the detection pool 30. Among them, the top of the detection pool 30 has a detection opening connected to the internal detection cavity 31 thereof, and the irradiation path of the emitter 10 and the receiving path of the detector 20 are symmetrically distributed along the plumb line, and both avoid the pool wall of the detection pool 30; the liquid level of the detection liquid in the detection cavity 31 during detection by the XRF detection system is the detection liquid level surface, and the intersection of the irradiation path and the receiving path is located at the detection liquid level surface. In the present invention, the intersection of the irradiation path of the emitter 10 and the receiving path of the detector 20 is located at the detection liquid level surface, and the irradiation path and the receiving path are symmetrically distributed along the plumb line, so that the rays emitted by the emitter 10 can be stably reflected to the detector 20 through the horizontal detection liquid level surface, and the detection liquid level surface is used as a fluorescent transmission medium. Compared with the traditional fluorescent transmission medium made of special materials such as Mylar film or gold paper, there will be no problems such as corrosion, aging, and damage, which improves the stability and accuracy of the detection. In addition, a detection opening is provided at the top of the detection pool 30, the emitter 10 and the detector 20 are located directly above the detection pool 30, and both the irradiation path and the receiving path avoid the pool wall of the detection pool 30 and point from the detection opening to the detection liquid in the detection pool 30. This ensures that there is no interference from the transmitted medium between the emitter 10 and the detection liquid and between the detector 20 and the detection liquid, avoiding the problem of insufficient detection stability and accuracy caused by the characteristics of the transmitted medium itself and the attachment of bubbles to the surface of the transmitted medium.

[0032] In actual implementation, the installation height of the emitter 10 and the detector 20 or the installation height of the detection pool 30 can be set to a height-adjustable structure for adjusting the height of the intersection of the illumination path and the receiving path to ensure that the intersection is located at the detection liquid level.

[0033] On the basis of the above, if Figure 1 As shown, the inner cavity of the detection pool 30 is divided by a partition 33 to form a detection cavity 31 and an overflow cavity 32 arranged horizontally and adjacently. The partition 33 has an overflow port connecting the detection cavity 31 and the overflow cavity 32, and the detection liquid overflowing from the detection cavity 31 is collected through the overflow cavity 32. Since the overflow liquid level of the overflow port constitutes the detection liquid level, when the solution is transported into the detection cavity 31 until the detection liquid flows from the overflow port to the overflow cavity 32, the liquid level of the detection liquid is adjusted to the detection liquid level, thereby realizing the rapid and accurate adjustment of the liquid level of the detection liquid in the detection cavity 31 to the detection liquid level.

[0034] The above-mentioned overflow port can be formed by opening a connecting port at any position of the partition 33. Preferably, the connecting port is arranged on the upper part of the partition 33, so that the detection liquid level surface is located at the upper part of the detection tank 30, which is convenient for the emitter 10 and the detector 20 to avoid the pool wall of the detection tank 30 during the arrangement process; and the connecting hole is preferably in the form of a long hole to ensure the overflow speed of the overflow port.

[0035] On the basis of the above, if Figure 2 As shown, in order to further realize the delivery and recovery of the detection liquid, the present invention is also provided with a pipeline structure for delivering and recovering the detection liquid.

[0036] Specifically, the bottom of the detection chamber 31 is connected to the detection liquid storage mechanism through the detection liquid circulation pipeline 50. The detection liquid circulation pipeline 50 is installed with a second pump P2. The second pump P2 is a bidirectional pump. When the delivery direction of the second pump P2 is switched, the detection liquid can be respectively input into the detection chamber 31 and the detection liquid in the detection chamber 31 can be recovered. The detection liquid circulation pipeline 50 is used to transport the detection liquid from the bottom of the detection chamber 31 to the detection chamber 31, so that the shaking amplitude of the detection liquid in the detection chamber 31 is small, and a pressure-free constant volume delivery process is achieved. In addition, the second pump P2 on the detection liquid circulation pipeline 50 is in the form of a bidirectional pump, which can change the flow direction of the detection liquid in the detection liquid circulation pipeline 50. After the detection is completed, the detection liquid can be extracted from the detection chamber 31 from the bottom of the detection chamber 31 through the detection liquid circulation pipeline 50 and transported to the detection liquid storage mechanism to achieve the recovery of the detection liquid.

[0037] In addition, the overflow chamber 32 is connected to the detection liquid storage mechanism through a recovery pipeline 60, and a fifth pump P5 for conveying detection liquid to the detection liquid storage mechanism is installed on the recovery pipeline 60. By starting the fifth pump P5, the detection liquid in the overflow chamber 32 can be recovered to the detection liquid storage mechanism through the recovery pipeline 60.

[0038] On the basis of the above, if Figure 2 As shown, the detection liquid storage mechanism includes a closed-loop circulation pipeline 70, along the circulation direction of the detection liquid in the circulation pipeline 70, the detection liquid tank 71, the first pump P1, the filter assembly 72 and the circulation cup 73 are arranged in sequence on the circulation pipeline 70, the detection liquid circulation pipeline 50 is connected with the circulation cup 73, and the recovery pipeline 60 is connected with the detection liquid tank 71. When in use, the first pump P1 is started first, so that the detection liquid in the detection liquid tank 71 circulates in sequence among the detection liquid tank 71, the filter assembly 72 and the circulation cup 73, ensuring that the detection liquid transported to the detection chamber 31 by the circulation cup 73 is the updated detection liquid.

[0039] On the basis of the above, if Figure 2As shown, the detection liquid circulation pipeline 50 is formed by the second two-position three-way reversing valve BV2 to form a liquid inlet and liquid return branch pipe 51 and a first waste branch pipe 52, the second pump P2 is installed on the liquid inlet and liquid return branch pipe 51, the liquid inlet and liquid return branch pipe 51 is connected to the detection liquid storage mechanism, the first waste branch pipe 52 is connected to the waste liquid tank 80, and the first waste branch pipe 52 is installed with a third pump P3 for discharging liquid to the waste liquid tank 80. By switching the second two-position three-way reversing valve BV2, when the liquid in the detection chamber 31 is a recyclable detection liquid, the detection liquid circulation pipeline 50 is connected to the liquid inlet and liquid return branch pipe 51, so that the liquid in the detection chamber 31 is discharged into the detection liquid storage mechanism. When the liquid in the detection chamber 31 is contaminated or the detection chamber 31 is cleaned by clean water, the detection liquid circulation pipeline 50 is connected to the first waste branch pipe 52, so that the liquid in the detection chamber 31 is discharged into the waste liquid tank 80.

[0040] In addition, if Figure 2 As shown, the recovery pipeline 60 is branched by the third two-position three-way reversing valve BV3 to form a recovery branch pipe 62 and a second waste branch pipe 61, the fifth pump P5 is installed on the recovery branch pipe 62, the recovery branch pipe 62 is connected to the detection liquid storage mechanism, the second waste branch pipe 61 is connected to the waste liquid tank 80, and the second waste branch pipe 61 is installed with a fourth pump P4 for discharging liquid to the waste liquid tank 80. Similar to the detection liquid circulation pipeline 50, the third two-position three-way reversing valve BV3 can be switched according to whether the solution in the overflow chamber 32 needs to be recovered, so that the liquid in the overflow chamber 32 is discharged into the detection liquid storage mechanism or the waste liquid tank 80.

[0041] On the basis of the above, in order to realize the automatic cleaning of the detection chamber 31 and the overflow chamber 32, as Figure 2 As shown, the detection chamber 31 is connected to the clean water tank 41 through a cleaning pipeline 40, and a sixth pump P6 is installed on the cleaning pipeline 40 to transport clean water to the detection chamber 31. The clean water in the clean water tank 41 is transported to the detection chamber 31 through the sixth pump P6, and overflows to the overflow chamber 32 after the detection chamber 31 is fully loaded, thereby realizing the sequential cleaning of the detection chamber 31 and the overflow chamber 32. Of course, during the cleaning process, the overflow chamber 32 and the detection chamber 31 are both in a state of being connected to the waste liquid tank 80.

[0042] On the basis of the above, if Figure 2As shown, the circulation pipeline 70 is also equipped with a first two-position three-way reversing valve BV1, which is located between the detection liquid tank 71 and the first pump P1. The first pump P1 is connected to the detection liquid tank 71 and the waste liquid tank 80 through the first two-position three-way reversing valve BV1. The first pump P1 is a two-way pump. When the delivery direction of the first pump P1 is switched, the detection liquid in the detection liquid tank 71 can be extracted and the waste liquid can be delivered to the waste liquid tank 80. By switching the first two-position three-way reversing valve BV1, the detection liquid in the circulation pipeline 70 can be selectively discharged into the detection liquid tank 71 or the waste liquid tank 80, which is used to empty the liquid in the circulation pipeline 70 or backwash the filter assembly 72.

[0043] On the basis of the above, if Figure 1 As shown, the irradiation path and the receiving path are vertically distributed, so that the effect of the detector 20 receiving radiation is further improved.

[0044] It is worth mentioning that, due to the top opening structure of the detection chamber 31 in the present invention, the corrosive gas caused by the volatilization of the gas in the detection chamber 31 may pollute the transmitter 10 and the detector 20. The present invention is provided with a structure for gas diversion. Specifically, Figure 3 As shown, it includes an air supply module 91 located directly above the emitter 10 and the detector 20 and vertically supplies air, and also includes an exhaust module 92 located on both sides of the emitter 10 and the detector 20 and exhausts air to both sides. Through the arrangement of the air supply module 91, the corrosive gas can flow downward to prevent the corrosive gas from contaminating the emitter 10 and the detector 20; at the same time, the emitter 10 can also be cooled by air. In addition, on the basis of the air supply module 91 blowing the corrosive gas downward, an exhaust module 92 is also arranged to discharge the corrosive gas to both sides, so that the corrosive gas and the hot air flow are away from the detection system.

[0045] To facilitate further understanding of the solution, the following is a detailed description of the system's working arrangement:

[0046] Step 1: Ensure that the first two-position three-way reversing valve BV1 is in a state where the circulation pipeline 70 is disconnected from the waste liquid tank 80; the first pump P1 rotates forward, so that the detection liquid in the detection liquid tank 71 circulates in sequence among the detection liquid tank 71, the filter assembly 72, and the circulation cup 73, ensuring that the detection liquid in the circulation cup 73 is the updated detection liquid; at the same time, start the air supply module 91 and the exhaust module 92;

[0047] Step 2: Ensure that the second two-position three-way reversing valve BV2 and the third two-position three-way reversing valve BV3 are in a state where the liquid inlet and return branch pipe 51 is connected to the detection chamber 31 and the recovery branch pipe 62 is connected to the overflow chamber 32; the second pump P2-2 rotates forward to transport the detection liquid in the circulation cup 73 to the detection chamber 31 until the detection chamber 31 is fully loaded and the liquid level of the detection liquid reaches the detection liquid level, and the excess detection liquid overflows to the overflow chamber 32 through the overflow port; at this time, the fifth pump P5 is started to recover the detection liquid in the overflow chamber 32 into the detection liquid tank 71;

[0048] Step 3: Turn on the transmitter 10 and the detector 20 to perform the detection operation; after the detection is completed, the second pump P2-2 is reversed, and the first pump P1 is reversed, so that the detection liquid in the detection chamber 31 is pumped back into the detection liquid tank 71; of course, in this step, if the solution in the detection chamber 31 cannot be reused, the circulation pipeline 70 can also be switched to connect with the waste liquid tank 80 through the first two-position three-way reversing valve BV1, so that the solution can be discharged into the waste liquid tank 80.

[0049] Step 4: The second two-position three-way reversing valve BV2 and the third two-position three-way reversing valve BV3 switch the flow path so that the first waste branch pipe 52 is connected to the detection chamber 31, and the second waste branch pipe 61 is connected to the overflow chamber 32; turn on the sixth pump P6 to transport the clean water in the clean water tank 41 to the detection chamber 31, and overflow to the overflow chamber 32 after the detection chamber 31 is fully loaded; at the same time, turn on the third pump P3 and the fourth pump P4 to discharge the liquid in the detection chamber 31 and the overflow chamber 32 into the waste liquid tank 80 to complete the cleaning. At this time, a measurement is ended.

[0050] Of course, it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0052] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A solution XRF detection system, characterized in that: The invention comprises a detection pool (30), wherein the top of the detection pool (30) has a detection opening connected to an internal detection cavity (31) thereof, and an emitter (10) and a detector (20) are arranged directly above the detection pool (30). The irradiation path of the emitter (10) and the receiving path of the detector (20) are symmetrically distributed along a plumb line and both avoid the pool wall of the detection pool (30). The liquid level of the detection liquid in the detection cavity (31) during detection by an XRF detection system is taken as the detection liquid level, and the intersection point of the irradiation path and the receiving path is located at the detection liquid level.

2. The XRF detection system for a solution according to claim 1, characterized in that: The inner cavity of the detection pool (30) is divided by a partition (33) to form a detection cavity (31) and an overflow cavity (32) arranged horizontally adjacent to each other. The partition (33) is provided with an overflow port connecting the detection cavity (31) and the overflow cavity (32). The overflow liquid level surface of the overflow port constitutes the detection liquid level surface.

3. The XRF detection system for a solution according to claim 2, characterized in that: The bottom of the detection chamber (31) is connected to the detection liquid storage mechanism via a detection liquid circulation pipeline (50), and a second pump P2 is installed on the detection liquid circulation pipeline (50). The second pump P2 is a bidirectional pump. When the delivery direction of the second pump P2 is switched, the detection liquid can be respectively input into the detection chamber (31) and the detection liquid in the detection chamber (31) can be recovered; the overflow chamber (32) is connected to the detection liquid storage mechanism via a recovery pipeline (60), and a fifth pump P5 for delivering the detection liquid to the detection liquid storage mechanism is installed on the recovery pipeline (60).

4. The XRF detection system for a solution according to claim 3, characterized in that: The detection liquid storage mechanism comprises a closed-loop circulation pipeline (70), along the circulation direction of the detection liquid in the circulation pipeline (70), a detection liquid tank (71), a first pump P1, a filter assembly (72) and a circulation cup (73) are arranged in sequence on the circulation pipeline (70), the detection liquid circulation pipeline (50) is connected to the circulation cup (73), and the recovery pipeline (60) is connected to the detection liquid tank (71).

5. The XRF detection system for a solution according to claim 3 or 4, characterized in that: The detection liquid circulation pipeline (50) is branched through the second two-position three-way reversing valve BV2 to form a liquid inlet and liquid return branch pipe (51) and a first waste branch pipe (52). The second pump P2 is installed on the liquid inlet and liquid return branch pipe (51). The liquid inlet and liquid return branch pipe (51) is connected to the detection liquid storage mechanism. The first waste branch pipe (52) is connected to the waste liquid tank (80), and a third pump P3 is installed on the first waste branch pipe (52) for discharging liquid into the waste liquid tank (80).

6. The XRF detection system for a solution according to claim 5, characterized in that: The recovery pipeline (60) is branched through the third two-position three-way reversing valve BV3 to form a recovery branch pipe (62) and a second waste branch pipe (61). The fifth pump P5 is installed on the recovery branch pipe (62). The recovery branch pipe (62) is connected to the detection liquid storage mechanism. The second waste branch pipe (61) is connected to the waste liquid tank (80), and the second waste branch pipe (61) is installed with a fourth pump P4 for discharging liquid into the waste liquid tank (80).

7. The XRF detection system for a solution according to claim 6, characterized in that: The detection chamber (31) is connected to the clean water tank (41) via a cleaning pipeline (40), and a sixth pump P6 for conveying clean water to the detection chamber (31) is installed on the cleaning pipeline (40).

8. The XRF detection system for a solution according to claim 4, characterized in that: The circulation pipeline (70) is also provided with a first two-position three-way reversing valve BV1, which is disposed between the detection liquid tank (71) and the first pump P1. The first pump P1 is connected to the detection liquid tank (71) and the waste liquid tank (80) through the first two-position three-way reversing valve BV1. The first pump P1 is a bidirectional pump. When the delivery direction of the first pump P1 is switched, the detection liquid in the detection liquid tank (71) can be extracted and the waste liquid can be delivered to the waste liquid tank (80).

9. The XRF detection system for a solution according to any one of claims 1 to 4, characterized in that: The irradiation path and the receiving path are distributed vertically.

10. The XRF detection system for a solution according to any one of claims 1 to 4, characterized in that: It comprises an air supply module (91) located directly above the transmitter (10) and the detector (20) and supplying air vertically, and an air exhaust module (92) located on both sides of the transmitter (10) and the detector (20) and exhausting air toward both sides.

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