Detection device and detection method for dissolution efficiency of instant potassium sulfate

Abstract

The invention relates to the technical field of raw material analysis and detection, in particular to a dissolution efficiency detection device and method for instant potassium sulphate, the dissolution efficiency detection device comprises a detection container, a rotation measurement component and a rotation speed sensor, the rotation measurement component comprises a rotation shaft and a plurality of filter screen plates, and a material guide groove for containing raw materials is formed in an inner cavity of the upper end of the rotation shaft; a containing cavity communicated with the material guide groove is formed in the filter screen plate, an opening is formed in the upper end of the material guide groove and is communicated with an external sample feeding mechanism, the rotating speed sensor is connected with the rotating shaft, and a weighing mechanism is further arranged at the bottom of the detection container. According to the invention, the effect of quantitatively monitoring the whole dynamic process from the beginning of dissolution to the complete dissolution of the instant potassium sulfate in real time can be achieved, and the defects that the traditional manual visual inspection timing mode is strong in subjectivity and cannot reflect the dynamic process are effectively overcome; the effects of dissolving efficiency detection and insoluble impurity content weighing are seamlessly completed in one test, and the operation process is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of raw material analysis and testing technology, and in particular to a device and method for detecting the dissolution efficiency of fast-dissolving potassium sulfate. Background Technology

[0002] As a high-concentration, high-quality potassium fertilizer, the dissolution efficiency of fast-dissolving potassium sulfate directly affects its application effect in modern agricultural fertigation systems. Efficient dissolution means the fertilizer can be quickly transported by the irrigation system and absorbed by crops, while slow dissolution or the presence of excessive insoluble impurities can lead to a series of problems such as drip irrigation nozzle clogging and uneven fertilization. Therefore, rapid and accurate testing of the dissolution efficiency and insoluble content of fast-dissolving potassium sulfate products before fertilizer production, quality inspection, and application is crucial for ensuring the stable operation of fertilization systems and assessing fertilizer quality.

[0003] Currently, fertilizer solubility testing largely relies on traditional manual operations and laboratory methods, which have three main shortcomings. First, existing methods struggle to provide an objective and quantitative assessment of overall dissolution efficiency. Common methods involve stirring and dissolving in a beaker, relying on visual inspection or a stopwatch to determine complete dissolution time. This approach is highly subjective, fails to provide reproducible quantitative indicators, and is particularly inaccurate in capturing the efficiency changes throughout the entire process from initial dissolution to near-complete dissolution. Second, dissolution efficiency testing is separated from impurity testing. Typically, a dissolution test must be completed first, followed by collection and weighing of insoluble matter using an additional filtration device. This process is cumbersome and prone to sample loss due to transfer operations, affecting the accuracy of impurity measurements. Third, the test conditions do not closely match real-world application environments. Static beaker stirring cannot simulate the dynamic dissolution of fertilizer in flowing water, limiting the predictive value of test results for predicting fertilizer performance in drip irrigation systems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a device and method for detecting the dissolution efficiency of fast-dissolving potassium sulfate.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A device for detecting the dissolution efficiency of rapidly soluble potassium sulfate includes a detection container and a rotating measuring component. The rotating measuring component is disposed within the inner cavity of the detection container and also includes a speed sensor. The rotating measuring component includes a rotating shaft and several filter plates. The upper inner cavity of the rotating shaft is provided with a material guide trough for receiving raw materials. The lower end of the material guide trough is provided with several material guide outlets circumferentially. The filter plates correspond to the several material guide outlets respectively. The side wall of the connection end of the filter plate and the rotating shaft is provided with a material inlet. The interior of the filter plate is provided with a receiving cavity communicating with the material guide trough. The upper end of the material guide trough is open and communicates with an external sample feeding mechanism. The speed sensor is connected to the rotating shaft. The bottom of the detection container is also provided with a weighing mechanism.

[0006] Furthermore, a drive motor is installed on the detection container, and a transmission ring is arranged around the upper outer wall of the rotating shaft. The output shaft of the drive motor is connected to the transmission ring. The drive motor is a constant power motor or maintains a constant power output through a control system, providing a stable and repeatable input power for the entire rotating measuring component. Under the premise of constant driving force, the change in the rotational speed of the rotating shaft can reflect the change in fluid resistance experienced by the filter plate, thereby quantifying the dissolution process. The transmission ring enables efficient power transmission from the motor to the rotating shaft. A speed sensor is mounted on the detection container via a fixed rod. The speed sensor is equipped with rotating teeth that mesh with the transmission ring. When the rotating shaft rotates, the rotation of the transmission ring drives the rotating teeth to rotate, and the gear mechanism drives the pointer to indicate the speed on the dial. The dial can be calibrated to intuitively show the dissolution rate or directly calibrate the speed value.

[0007] Furthermore, a transmission bearing is provided at the upper end of the rotating shaft. The transmission bearing includes a mating outer ring and an inner ring. The outer ring is fixedly connected to the output end of the sample feeding mechanism, and the inner ring is fixedly connected to the top end of the rotating shaft. The transmission bearing is used for the integration of the rotating shaft and the sample feeding mechanism. Its outer ring is fixedly connected to the feed pipe to ensure that the sample and water source can be stably delivered to the guide trough inside the rotating shaft, while its inner ring rotates together with the rotating shaft. This allows the device to complete the sample addition and water injection processes without stopping the machine, ensuring the continuity and sealing of the testing process.

[0008] Furthermore, the top of the detection container is equipped with a sealing cap, and the center of the sealing cap has a through hole for the rotating shaft to pass through. The sealing cap is used to seal the detection container, preventing the mixed liquid from splashing out during rotation, and ensuring that a relatively closed fluid environment is formed inside the detection container. This makes the hydrodynamic effects generated when the filter plate rotates more stable and predictable, eliminating interference from factors such as air disturbance in the open environment on the measurement results. In addition, a limiting mechanism, such as a groove, is provided at the through hole, and a limiting seat is provided on the shaft of the rotating shaft in this area to limit the rotation of the shaft.

[0009] Furthermore, the weighing mechanism includes a weighing tray and a weighing pin. The weighing pin is positioned at the center of the weighing tray and connected to a detection element inside the weighing tray. A control panel is also provided on the outer wall of the weighing tray. The weighing mechanism is used for in-situ weighing of the rotating measuring component. The weighing pin is raised and connected to the bottom of the rotating shaft, accurately transferring the weight of the entire rotating measuring component to a high-precision sensor inside the weighing tray. The control panel is used to perform functions such as tare, zeroing, and reading of the weighing unit. After the test, there is no need to disassemble or transfer the residue inside the filter plate; weighing can be performed directly, simplifying the operation, avoiding losses during sample transfer, and improving the accuracy of insoluble matter mass measurement data.

[0010] Furthermore, a weighing hole is provided at the center of the bottom of the testing container for a weighing pin to pass through, and the top of the weighing pin is movably inserted into the bottom of the rotating shaft. This insertion connection facilitates the installation and disassembly of the rotating measuring component while ensuring the stability of weight transfer.

[0011] Furthermore, the weighing tray is equipped with an adjustment device connected to the weighing pin, and the weighing hole is surrounded by a sealing ring. The adjustment device is a vertically movable lifting mechanism. After the rotating shaft stops rotating, the adjustment device drives the weighing pin to rise and abut against the rotating shaft, facilitating weighing operations. The sealing ring effectively seals the gap between the weighing hole and the weighing pin, preventing liquid leakage from the detection container and ensuring complete isolation between the dry environment where the load cell is located and the liquid environment above.

[0012] Furthermore, the bottom of the filter plate is equipped with an openable, sealed cover for discharging impurities, and the bottom side wall of the detection container is provided with a drain port that communicates with an external liquid storage mechanism. The sealed cover at the bottom of the filter plate allows for easy cleaning and collection of residual insoluble matter after a single test and weighing, providing samples for subsequent analysis, or directly discharging the insoluble matter for later weighing and testing. The drain port completely empties the mixture from the detection container, improving the efficiency of continuous batch testing.

[0013] A method for detecting the dissolution efficiency of rapidly soluble potassium sulfate using a device includes the following steps: S1: The upper end of the rotating shaft is connected to the external sample feeding mechanism. When the sample feeding mechanism is started, the raw material is introduced into the inner cavity of the rotating shaft, i.e. the guide groove. Under the action of gravity, the raw material falls evenly into the receiving cavity of each filter plate. S2: The amount of raw material input is pre-proportioned according to the volume of the testing container. After the raw material input is completed, water is input from the top of the rotating shaft through the water supply mechanism until the inner cavity of the testing container is full. S3: Start the rotating measuring component. The rotation of the rotating shaft drives the filter plate to rotate. Since the raw materials are not fully dissolved, the constant input power causes the filter plate to generate resistance in the water, and the rotation speed is lower than the speed corresponding to the input power. S4: As the filter plate rotates, the raw materials gradually dissolve, the rotational resistance of the rotating shaft decreases, and the rotational speed gradually increases. This is monitored by the speed sensor until the speed reaches a constant value. S5: Discharge the mixture in the testing container, weigh the rotating measuring component, remove its own weight, obtain the weight of the impurities, and record the data to provide a reference for the quality of the raw materials.

[0014] Furthermore, in step S2 above, the upper end of the rotating shaft is connected to the output end of a three-way valve, and the two input ends of the three-way valve are respectively connected to the sample feeding mechanism and the water supply mechanism. By setting up the three-way valve, the sample addition and water injection processes can be quickly switched or performed simultaneously, and all operations are completed through the same path without opening the device. This not only improves the ease of operation but also ensures that the initial conditions for each test, such as the timing of the sample immersion start, are highly consistent, greatly improving the repeatability and comparability of the test results.

[0015] Furthermore, in step S4 above, by measuring and recording the data of the speed sensor in different time periods, the speed changes at different times in the early period until a certain time when all the recorded values ​​are the same speed value. The time period corresponding to the first value among the same values ​​is taken to prove that the time taken to reach that time period is when the raw material tends to be completely dissolved.

[0016] Furthermore, using different types of raw materials, the above steps S1-S5 are repeated. By recording the time required for the rotation speed of different measuring components to reach a constant value, the dissolution efficiency of different types is determined. The one with the shortest time is the one with the highest dissolution efficiency. This is supplemented by the impurity content to comprehensively evaluate the quality of each raw material. The detection method in this application provides two quantifiable quality evaluation indicators: dissolution time and insoluble matter content. Dissolution time is automatically recorded by a rotation speed sensor, reflecting the dissolution rate of the raw material under dynamic hydraulic conditions. Insoluble matter content is obtained through a weighing mechanism. Combining these two indicators allows for comprehensive performance ranking and quality evaluation of different batches of instant potassium sulfate products.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, by incorporating a rotating measuring component with an integrated speed sensor and a filter plate internally containing the raw materials, enables quantitative evaluation of the entire process of rapidly soluble potassium sulfate from initial dissolution to near-complete dissolution. Driven by constant power, the rotational speed of the shaft gradually increases as the resistance caused by the dissolution of the raw materials decreases. By recording the time required for the rotational speed to stabilize, the dissolution efficiency is transformed into an objective and reproducible quantitative indicator, effectively overcoming the shortcomings of traditional manual visual timing methods, which are highly subjective and lack standardized evaluation criteria. 2. By setting up a weighing mechanism that is plugged into the bottom of the rotating shaft, the present invention can seamlessly complete the dissolution efficiency test and the weighing of insoluble impurity content in one test, which greatly simplifies the operation process, avoids sample transfer loss, and significantly improves the accuracy of impurity detection data and overall detection efficiency. 3. This invention can simulate the real dissolution environment of fast-dissolving potassium sulfate in the flowing water of drip irrigation pipes. The raw material particles are subjected to the shear force of the water flow while being stirred in the filter screen plate. The change in fluid resistance caused by the dissolution process is directly converted into the change in the rotation speed of the rotating shaft, so that the test results can more realistically reflect the application performance of fertilizer in actual water and fertilizer integration systems. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the rotating measuring component; Figure 4 This is a partial disassembly diagram of the rotating measuring component; Attached diagram labels: 1-Detection container, 2-Speed ​​sensor, 3-Rotating shaft, 4-Filter screen, 5-Guide trough, 6-Guide outlet, 7-Inlet, 8-Receiving cavity, 9-Drive motor, 10-Transmission ring, 11-Transmission bearing, 12-Sealing cover, 13-Weighing tray, 14-Weighing pin, 15-Control panel, 16-Drain outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0020] Example 1, as Figures 1-4As shown, this invention discloses a device for detecting the dissolution efficiency of fast-dissolving potassium sulfate, comprising a detection container 1 and a rotating measuring component. The rotating measuring component is disposed in the inner cavity of the detection container 1 and also includes a speed sensor 2. The rotating measuring component includes a rotating shaft 3 and several filter plates 4. The upper inner cavity of the rotating shaft 3 is provided with a material guide trough 5 for receiving raw materials. The lower end of the material guide trough 5 is provided with several material guide outlets 6 circumferentially. The filter plates 4 correspond to the several material guide outlets 6 respectively. The side wall of the connection end of the filter plates 4 and the rotating shaft 3 is provided with a material inlet 7, which is adapted to the material guide outlets 6. The interior of the filter plates 4 is provided with a receiving cavity 8 communicating with the material guide trough 5. The upper end of the material guide trough 5 is open and communicates with an external sample feeding mechanism. The speed sensor 2 is connected to the rotating shaft 3. The bottom of the detection container 1 is also provided with a weighing mechanism.

[0021] A drive motor 9 is installed on the detection container 1, and a transmission ring 10 is arranged around the upper outer wall of the rotating shaft 3. The output shaft of the drive motor 9 is connected to the transmission ring 10. Specifically, the drive motor 9 is preferably a constant power motor or maintains a constant power output through a control system, providing a stable and repeatable input power for the entire rotating measuring component. Under the premise of constant driving force, the change in rotational speed of the rotating shaft 3 can accurately reflect the change in fluid resistance experienced by the filter plate 4, thereby quantifying the dissolution process. The transmission ring 10 realizes efficient and stable power transmission from the motor to the rotating shaft 3. The speed sensor 2 is installed on the detection container 1 via a fixed rod. The speed sensor 2 is equipped with rotating teeth that mesh with the transmission ring 10. When the rotating shaft 3 rotates, the rotation of the transmission ring 10 drives the rotating teeth to rotate, and the gear mechanism drives the pointer to indicate the speed on the dial. The dial can be calibrated to intuitively show the dissolution rate or directly calibrate the speed value. Preferably, a mechanical stopwatch is integrated on the speed sensor 2. The operator can press the stopwatch to start timing at the moment of feeding and stop timing when the pointer stabilizes, thereby obtaining the time required to reach a stable flow rate. The drive motor 9 is a drive motor 9 with constant power control mode. When the load changes, the motor can automatically adjust its output torque to maintain constant output power. Alternatively, an ordinary motor can be used in conjunction with a mechanical constant torque mechanism (such as a friction disc clutch) to achieve an approximately constant power output characteristic.

[0022] A transmission bearing 11 is provided at the upper end of the rotating shaft 3. The transmission bearing 11 includes an outer ring and an inner ring that cooperate with each other. The outer ring is fixedly connected to the output end of the sample feeding mechanism, and the inner ring is fixedly connected to the top end of the rotating shaft 3. Specifically, the transmission bearing 11 is used for the integration of the rotating shaft 3 and the sample feeding mechanism. Its outer ring is fixedly connected to the feed pipe to ensure that the sample and water source can be stably delivered to the guide trough 5 inside the rotating shaft 3, while its inner ring rotates together with the rotating shaft 3. This allows the device to complete the sample addition and water injection processes without stopping the machine or opening the seal, ensuring the continuity and sealing of the testing process and avoiding external interference.

[0023] The top of the detection container 1 is provided with a sealing cover 12, and the center of the sealing cover 12 has a through hole for the rotating shaft 3 to pass through. Specifically, the sealing cover 12 is used to seal the detection container 1, preventing the mixed liquid from splashing out during rotation, and ensuring that a relatively closed fluid environment is formed inside the detection container 1. This makes the hydrodynamic effect (resistance change) generated when the filter plate 4 rotates more stable and predictable, and eliminates the interference of factors such as air disturbance in the open environment on the measurement results. In addition, a limiting mechanism, such as a slot, is provided at the through hole, and a limiting seat is provided on the shaft of the rotating shaft 3 in this area to limit the rotating shaft 3. Preferably, the upper and lower ends of the limiting seat are provided with elastic components, that is, the rotating shaft 3 can be adjusted longitudinally. This ensures that the shaft is limited, and that the weight change of the rotating measuring component is weighed by a weighing mechanism while the longitudinal adjustment of the rotating shaft 3 is ensured.

[0024] The weighing mechanism includes a weighing tray 13 and a weighing pin 14. The weighing pin 14 is located at the center of the weighing tray 13 and connected to the detection element inside the weighing tray 13. A control panel 15 is also provided on the outer wall of the weighing tray 13. Specifically, this weighing mechanism is used for in-situ weighing of the rotating measuring component and its internal insoluble matter. During the dissolution test, the rotating shaft 3 rotates independently. When the rotation speed reaches a stable level, indicating that the raw material is basically completely dissolved, the weighing pin 14 is raised by the adjustment device, so that the two come into contact and achieve a reliable connection. At this time, the weight of the entire rotating measuring component is accurately transferred to the high-precision sensor inside the weighing tray 13 through the weighing pin 14. The control panel 15 is used to realize the functions of tare, zeroing, and reading of the weighing unit. This design allows for direct weighing without disassembling or transferring the residue inside the filter plate 4 after the test, simplifying the operation, avoiding loss during sample transfer, and improving the accuracy of the insoluble matter mass measurement data.

[0025] The bottom center of the testing container 1 has a weighing hole through which a weighing pin 14 passes. The top of the weighing pin 14 is movably inserted into the bottom of the rotating shaft 3, and a sealing ring covers the periphery of the weighing hole. Specifically, the insertion connection facilitates the installation and disassembly of the rotating measuring component while ensuring the stability of weight transfer.

[0026] The weighing tray 13 is also equipped with an adjustment device connected to the weighing pin 14, and the weighing hole is surrounded by a sealing ring. Specifically, the adjustment device is a vertically movable lifting mechanism. After the rotating shaft 3 stops rotating, the adjustment device drives the weighing pin 14 to rise and abut against the rotating shaft 3, facilitating weighing operations. The sealing ring effectively seals the gap between the weighing hole and the weighing pin, preventing liquid leakage from the detection container and ensuring complete isolation between the dry environment where the load cell is located and the liquid environment above.

[0027] The bottom of the filter plate 4 is equipped with an openable, sealed cover for discharging impurities, and the bottom side wall of the detection container 1 is provided with a drain port 16 that communicates with an external liquid storage mechanism. Specifically, the sealed cover at the bottom of the filter plate 4 allows for easy opening and collection of residual insoluble matter after a single test and weighing, providing samples for subsequent laboratory analysis, or direct discharge for subsequent weighing and testing. The drain port 16 can completely empty the mixture in the detection container 1, improving the efficiency of continuous batch testing.

[0028] Example 2, based on Example 1, proposes a detection method for a device to detect the dissolution efficiency of rapidly soluble potassium sulfate, specifically including the following steps: S1: The upper end of the rotating shaft 3 is connected to the external sample feeding mechanism. When the sample feeding mechanism is started, the raw material is introduced into the inner cavity of the rotating shaft 3, i.e. the guide groove 5. Under the action of gravity, the raw material falls evenly into the receiving cavity 8 of each filter plate 4. S2: The amount of raw material input is pre-proportioned according to the volume of the detection container 1. After the raw material input is completed, water is input from the top of the rotating shaft 3 through the water supply mechanism until the inner cavity of the detection container 1 is full. S3: Start the rotating measuring component. The rotation of the rotating shaft 3 drives the filter plate 4 to rotate. Since the raw material is not fully dissolved, the constant input power causes the filter plate 4 to generate resistance in the water, and the rotation speed is lower than the speed corresponding to the input power. S4: During the rotation of the filter plate 4, the raw materials gradually dissolve, the rotational resistance of the rotating shaft 3 decreases, and the rotational speed gradually increases. Through the monitoring of the speed sensor 2, the speed reaches a constant value. S5: Discharge the mixture in the testing container 1, weigh the rotating measuring component, remove its own weight, obtain the weight of the impurities, and record the data to provide a reference for the quality of the raw materials.

[0029] This invention fundamentally solves the dissolution error problem caused by uneven sample distribution and insufficient contact in traditional detection methods, ensuring that each batch of raw materials can fully exert its own dissolution performance in a fair and consistent environment, thereby guaranteeing the accuracy and reliability of comparative data. Specifically, in traditional beaker stirring tests, powdered or granular samples, after being poured into water at once, easily accumulate at the bottom of the container under gravity, forming sediment. Even with stirring, the following problems exist. First, the contact area is limited; the contact area between the internal particles of the accumulated sample and the water is small, and dissolution mainly relies on the surface particles. The dissolution rate of the internal particles is limited by the diffusion rate of the dissolved products, failing to truly reflect its intrinsic dissolution performance. Second, the dissolution environment is uneven; the sample concentration at the bottom is extremely high, forming a saturation zone, while the solution concentration at the top of the container is lower. This concentration gradient further inhibits the dissolution rate of the bottom sample. At the same time, the shear force generated by stirring is not uniformly distributed inside the container, and the hydrodynamic environment experienced by samples at different locations varies. Furthermore, dead zones can easily form. In areas where mixing is insufficient, the sample may remain for a long time, unable to effectively exchange with the solvent, resulting in slow or even incomplete dissolution of this portion of the sample. The combined effect of these factors means that the apparent dissolution rate of a sample depends not only on its inherent properties but also on random factors such as its position in the container and its packing state. This introduces significant errors between different experiments, rendering comparisons meaningless.

[0030] The present invention completely eliminates the aforementioned drawbacks through the following mechanisms. First, a pre-dispersion and isolation loading mechanism: before water injection, the sample is pre-distributed into the receiving cavities 8 of each independent filter plate 4 via the guide channel 5 and guide outlet 6 of the rotating shaft 3. This process ensures that the sample is no longer concentrated at one point, but is physically isolated and evenly distributed in multiple circumferential positions inside the container, preventing accumulation from the source. Second, maximizing the initial contact area: the receiving cavity 8 of each filter plate 4 has a filter structure wall, which itself has a huge surface area. The sample is loaded into it, which is equivalent to being spread on a huge predefined surface. Once water is injected, the water flow immediately contacts all surfaces of the sample simultaneously through the filter, achieving instantaneous full-area wetting and maximizing the initial contact area. In addition, the interface environment is continuously updated: after the rotating measuring component is started, each filter plate 4 rotates at high speed. This not only provides stirring force, but more importantly, its movement forces the water flow to continuously and at high speed penetrate the sample layer on the filter plate 4, constantly flushing away the saturated solution boundary layer on the surface of the sample particles and bringing in a water source with a lower concentration, thereby maintaining the surface of each sample particle in an environment of maximum concentration difference (dissolution driving force) so that its dissolution rate is always kept near its theoretical maximum value.

[0031] Example 3, based on Example 2, provides supplementary explanations regarding the detection method of a device for detecting the dissolution efficiency of fast-dissolving potassium sulfate.

[0032] In step S2 above, the upper end of the rotating shaft 3 is connected to the output end of a three-way valve, and the two input ends of the three-way valve are respectively connected to the sample feeding mechanism and the water supply mechanism. Specifically, by setting up the three-way valve, the sample addition and water injection processes can be quickly switched or performed simultaneously, and all operations are completed through the same path without opening the device. This not only improves the ease of operation but also ensures that the initial conditions for each test, such as the timing of the sample immersion start, are highly consistent, greatly improving the repeatability and comparability of the test results.

[0033] In step S4 above, the data from the speed sensor 2 is measured and recorded in time intervals. The speed changes at different times in the early stages until the recorded values ​​are all the same speed value after a certain time. The time interval corresponding to the first value among the same values ​​is taken to prove that the raw material tends to be completely dissolved during that time interval.

[0034] Using different types of raw materials, repeat steps S1-S5 above. By recording the time required for different rotating measuring components to reach a constant speed, the dissolution efficiency of different types is determined. The one with the shortest time has the highest dissolution efficiency, supplemented by the impurity content, to comprehensively evaluate the quality of each raw material. Specifically, the detection method in this application provides two quantifiable quality evaluation indicators: dissolution time and insoluble content. Dissolution time is automatically recorded by the speed sensor 2, reflecting the dissolution rate of the raw material under dynamic hydraulic conditions. Insoluble content is obtained through a weighing mechanism. Combining these two indicators allows for comprehensive performance ranking and quality evaluation of different batches of instant potassium sulfate products. For example, a product with a short dissolution time and low insoluble content is undoubtedly a high-quality product. Conversely, a product with a short dissolution time but high insoluble content may pose a risk of clogging the drip irrigation system. This evaluation method is comprehensive and scientific, far surpassing traditional, singular, and subjective evaluation methods.

[0035] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A device for detecting the dissolution efficiency of instant potassium sulfate, comprising a detection container (1) and a rotating measuring component, the rotating measuring component being arranged in the inner cavity of the detection container (1), characterized in that: Also include the rotating speed sensor (2), the rotating measuring component includes the rotating shaft (3) and the number of filter screen board (4), the upper end cavity of the rotating shaft (3) is provided with the material guide groove (5) containing raw materials, the lower end of the material guide groove (5) is provided with a plurality of material guide outlets (6) circumferentially, a plurality of the material guide outlets (6) correspond to the number of filter screen boards (4) respectively, the connecting end side wall of the filter screen board (4) and the rotating shaft (3) is provided with a material inlet (7), the inside of the filter screen board (4) is provided with a containing cavity (8) communicated with the material guide groove (5), the upper end of the material guide groove (5) is open and communicated with the outside sample feeding mechanism, the rotating speed sensor (2) is connected with the rotating shaft (3), the bottom of the detection container (1) is further provided with a weighing mechanism.

2. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 1, characterized in that: The detection container (1) is provided with a driving motor (9), the outer wall of the upper end of the rotating shaft (3) is provided with a transmission ring (10), and the output shaft of the driving motor (9) is in transmission connection with the transmission ring (10).

3. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 2, characterized in that: The upper end of the rotating shaft (3) is provided with a transmission bearing (11), the transmission bearing (11) includes an outer ring and an inner ring matched with each other, the outer ring is fixedly connected with the output end of the sample feeding mechanism, and the inner ring is fixedly connected with the top end of the rotating shaft (3).

4. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 1, characterized in that: The top of the detection container (1) is provided with a sealing cover (12), and the center of the sealing cover (12) is provided with a through hole for the rotating shaft (3) to penetrate.

5. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 1, characterized in that: The weighing mechanism includes a weighing tray (13) and a weighing top pin (14), the weighing top pin (14) is arranged at the center of the weighing tray (13) and connected with a detection element inside the weighing tray (13), and the outer side wall of the weighing tray (13) is further provided with a control panel (15).

6. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 5, characterized in that: The bottom center of the detection container (1) is provided with a weighing hole for the weighing top pin (14) to pass through, and the top of the weighing top pin (14) is movably inserted into the bottom of the rotating shaft (3).

7. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 6, characterized in that: The weighing tray (13) is further provided with an adjusting device connected with the weighing top pin (14), and the weighing hole is covered with a sealing rubber ring.

8. The device for detecting the dissolution efficiency of instant potassium sulfate according to claim 1, characterized in that: The bottom of the filter screen board (4) is provided with a closable cover plate for guiding out impurities, and the bottom side wall of the detection container (1) is provided with a liquid discharge port (16) communicated with an external liquid storage mechanism.

9. A method of detecting the dissolution efficiency of a rapidly dissolving potassium sulfate using the device of any one of claims 1-8, wherein the method comprises: The method comprises the following steps: S1: the upper end of the rotating shaft (3) is communicated with the outside sample feeding mechanism, the sample feeding mechanism is started, the raw materials are guided into the inner cavity of the rotating shaft (3), that is, the material guide groove (5), and the raw materials uniformly fall into the containing cavities (8) of the filter screen boards (4) under the action of gravity; S2: the input amount of raw materials is pre-proportioned according to the volume of the detection container (1), after the input of raw materials is completed, water is input from the upper end of the rotating shaft (3) through the water supply mechanism until the inner cavity of the detection container (1) is filled; S3: start the rotating measuring component, the rotation of the rotating shaft (3) drives the filter screen board (4) to rotate, because the raw materials are not fully dissolved, the constant input power makes the filter screen board (4) generate resistance in the water body, and the rotating speed is lower than the rotating speed corresponding to the input power; S4: In the process of rotating the filter screen plate (4), the raw material is gradually dissolved, the rotating resistance of the rotating shaft (3) is reduced, and then the rotating speed is gradually increased. Through the monitoring of the rotating speed sensor (2), the rotating speed reaches a constant value. S5: The mixed liquid in the detection container (1) is discharged, the rotating measuring part is weighed, the self weight is removed, the weight of the impurities is obtained, the data is recorded, and the index reference of the raw material quality is provided.

10. The method of claim 9, wherein: In the above step S2, the upper end of the rotating shaft (3) is connected with the output end of the three-way valve, and the two input ends of the three-way valve are respectively connected with the sample feeding mechanism and the water supply mechanism.

11. The method of claim 9, wherein: In the above step S4, the data of the rotating speed sensor (2) is measured and recorded in different time periods. The rotating speed of each time period changes at different times until the recorded values are the same after a certain time. The time period corresponding to the first same value is taken as the time required to reach the complete dissolution state of the raw material.

12. The method of claim 9, wherein: Different types of raw materials are taken, and the above steps S1-S5 are repeated. By recording the time required for the rotating speed of different rotating measuring parts to reach a constant value, the dissolution efficiency of different types of raw materials is determined.

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