Adaptive Adjustment Coarse Slime Dewatering Test System and Method

Abstract

The present invention relates to the technical field of coarse slime dewatering, and proposes an adaptive adjustment test system for coarse slime dewatering. The slime centrifuge includes a screen basket, a scraper and a driving mechanism. The driving mechanism includes a first variable-frequency motor and a second variable-frequency motor. The screen basket is connected to the output shaft of the first variable-frequency motor, and the scraper is connected to the output shaft of the second variable-frequency motor. The inlet end of the variable-frequency slurry pump is communicated with the discharge port of the mixing barrel, and the outlet end of the variable-frequency slurry pump is communicated with the feed port of the slime centrifuge. The signal output ends of the belt scale and the on-line moisture monitor are both connected to the input end of the control cabinet, and the output end of the control cabinet is simultaneously connected to the controlled ends of the variable-frequency slurry pump, the first variable-frequency motor and the second variable-frequency motor. It solves the problem that in the related technology, the rotation speed ratio of the scraper and the screen basket is fixed, the rotation speed of the scraper or the screen basket cannot be adjusted separately, and the throughput and dewatering effect cannot be perfectly matched according to the actual situation on site.

Description

Technical Field

[0001] The present invention relates to the technical field of coarse slime dewatering, and specifically, to an adaptive adjustment coarse slime dewatering test system and method. Background Art

[0002] At present, the centrifuge test method is a single-machine test, that is, taking a single-machine device as the main body, with single feeding. By changing the rotational speed, the feeding amount, and replacing different screen baskets (different screen slits, strip-shaped), multiple tests are carried out, and manual sampling and testing are performed to obtain experimental data such as product moisture and throughput. Each time, the parameters need to be adjusted by stopping the machine, and repeated tests are carried out. There is a lack of real-time data acquisition and adaptive adjustment system, and it cannot be quickly adjusted for continuous testing.

[0003] At present, the dewatering effect of the slime centrifuge and the influence of various factors on the dewatering effect still remain in the theoretical calculation stage. There is a lack of systematic evaluation and testing of the dewatering effect, and it is difficult to select appropriate centrifuge parameters according to the specific coal quality. With the increase in the selected amount of coarse slime, the horizontal scraper discharge slime centrifuge has become a new generation of large-throughput coarse slime dewatering equipment gradually favored by many coal preparation plants. It is mainly used for the dewatering of 3-0mm particle size coarse slime in coal preparation plants or the solid-liquid separation of similar materials. It is driven by a single belt pulley, and the speed difference between the spiral scraper and the screen basket is realized through a planetary cycloid pinwheel differential. The screen basket rotational speed determines the centrifugal force and affects the dewatering effect. The size of the speed difference affects the dewatering effect and throughput. When the speed difference is large, the spiral scraper pushes the material quickly, and the throughput is large, but the residence time of the material on the screen basket surface is short, and the dewatering effect is poor. The rotational speeds of the scraper and the screen basket can be adjusted by a frequency conversion motor, but due to the fixed transmission ratio of the differential, the speed ratio of the scraper and the screen basket is fixed, and the rotational speed of the scraper or the screen basket cannot be adjusted separately, and the perfect coordination of throughput and dewatering effect cannot be achieved according to the actual situation on site. Summary of the Invention

[0004] The present invention provides an adaptive adjustment coarse slime dewatering test system and method, which solves the problem in the related technology that the speed ratio of the scraper and the screen basket is fixed, the rotational speed of the scraper or the screen basket cannot be adjusted separately, and the perfect coordination of throughput and dewatering effect cannot be achieved according to the actual situation on site.

[0005] The technical solution of the present invention is as follows: An adaptive adjustment coarse slime dewatering test system, including a slime centrifuge, which includes a screen basket, a scraper and a driving mechanism. The screen basket and the scraper are both connected to the driving mechanism. The key lies in that: the driving mechanism includes a first variable-frequency motor and a second variable-frequency motor. The screen basket is connected to the output shaft of the first variable-frequency motor, and the scraper is connected to the output shaft of the second variable-frequency motor. The system also includes a mixing barrel, a belt scale with one end connected to the discharge port of the slime centrifuge and the other end connected to the feed port of the mixing barrel, and an on-line moisture monitor arranged above the belt scale. It also includes a variable-frequency slurry pump and a control cabinet. The inlet end of the variable-frequency slurry pump is communicated with the discharge port of the mixing barrel, and the outlet end of the variable-frequency slurry pump is communicated with the feed port of the slime centrifuge. The signal output ends of the belt scale and the on-line moisture monitor are both connected to the input end of the control cabinet, and the output end of the control cabinet is simultaneously connected to the controlled ends of the variable-frequency slurry pump, the first variable-frequency motor and the second variable-frequency motor.

[0006] The slime centrifuge further includes a casing, a feed pipe, a screen basket pulley and a scraper pulley. The screen basket is rotatably arranged in the casing, the scraper is rotatably arranged inside the screen basket, and the outlet end of the feed pipe extends into the inside of the scraper. The outlet end of the variable-frequency slurry pump is communicated with the inlet end of the feed pipe. One end of the screen basket away from the feed pipe is coaxially provided with a screen basket shaft, and one end of the scraper away from the feed pipe is coaxially provided with a scraper shaft. The screen basket pulley is coaxially arranged and fixedly connected with the screen basket shaft. One end of the scraper shaft away from the feed pipe passes through the screen basket shaft and is coaxially arranged and fixedly connected with the scraper pulley. The screen basket pulley is connected to the output shaft of the first variable-frequency motor, and the scraper pulley is connected to the output shaft of the second variable-frequency motor. The discharge port opened at the bottom of the casing is located outside the screen basket, and a liquid discharge port is opened at the position corresponding to the screen basket at the bottom of the casing. The slime centrifuge further includes a distribution plate arranged inside the scraper and coaxially arranged with the scraper shaft, and the outlet end of the feed pipe faces the distribution plate.

[0007] The diameter of the screen basket linearly decreases from the end close to the feed pipe to the other end. The scraper includes a cone with an opening facing the feed pipe and a spiral blade wound around the outer wall of the cone. The shape of the cone matches the shape of the screen basket.

[0008] The diameter of the distribution plate linearly increases from the end close to the feed pipe to the other end.

[0009] The diameter of the lower end of the mixing barrel linearly decreases from top to bottom.

[0010] A first regulating valve is connected between the inlet end of the variable-frequency slurry pump and the discharge port of the mixing barrel, and a second regulating valve is connected between the outlet end of the variable-frequency slurry pump and the feed port of the slime centrifuge.

[0011] The system further includes a discharge pipe communicated with the discharge port of the mixing barrel, and a discharge valve is arranged on the discharge pipe.

[0012] The gap between the scraper and the screen basket is 5 - 15 mm.

[0013] The test method of the adaptive adjustment coarse slime dewatering test system is crucial in that: the method includes the following steps:

[0014] A. The online moisture monitor sends the detected data to the control cabinet;

[0015] B. The control cabinet compares the received real-time moisture data with the set moisture data. When the real-time moisture data is greater than the set moisture data, the control cabinet issues an instruction to increase the screen basket speed through the first variable-frequency motor and reduce the speed difference between the screen basket and the scraper; when the real-time moisture data is less than the set moisture data, the control cabinet issues an instruction to decrease the screen basket speed through the first variable-frequency motor and increase the speed difference between the screen basket and the scraper.

[0016] Step A further includes the following steps: The belt scale sends the detected data to the control cabinet;

[0017] Step B further includes the following steps: The control cabinet compares the received real-time discharge amount data with the set discharge amount data. When the real-time discharge amount data is less than the set discharge amount data, the control cabinet issues an instruction to increase the speed of the variable-frequency slurry pump and increase the feed amount; when the real-time discharge amount data is greater than the set discharge amount data, the control cabinet issues an instruction to decrease the speed of the variable-frequency slurry pump and reduce the feed amount.

[0018] The working principle and beneficial effects of the present invention are as follows: A mixing barrel is provided, a belt scale is arranged between the discharge port of the coal slime centrifuge and the feed port of the mixing barrel, an on-line moisture monitor is arranged above the belt scale, a variable-frequency slurry pump is arranged between the discharge port of the mixing barrel and the feed port of the coal slime centrifuge. The signal output ends of the belt scale and the on-line moisture monitor are both connected to the input end of the control cabinet, and the output end of the control cabinet is simultaneously connected to the controlled ends of the variable-frequency slurry pump, the first variable-frequency motor and the second variable-frequency motor. The screen basket is connected to the output shaft of the first variable-frequency motor, and the scraper is connected to the output shaft of the second variable-frequency motor. The screen basket and the scraper are respectively driven by two variable-frequency motors, and they rotate freely relative to each other, without a fixed speed difference or speed ratio. The on-line moisture monitor uses forms such as far-infrared and microwave to perform real-time moisture monitoring on the product discharged from the coal slime centrifuge onto the belt scale. The belt scale weighs the discharged material in real time, calculates the real-time processing capacity, and both the real-time processing capacity and the real-time moisture signals can be transmitted to the control cabinet and displayed in real time in the visualization window of the control cabinet. The control cabinet can be used to adjust and set the moisture data and the set discharge amount (select values within a reasonable range, and the two values are interrelated). The control cabinet compares and analyzes the collected real-time signals with the set values, adjusts the screen basket speed according to the size of the real-time moisture data, thereby changing the speed difference between the screen basket and the scraper, and adjusts the variable-frequency slurry pump speed according to the size of the real-time discharge amount. The present invention can adjust the screen basket speed and the speed difference between the screen basket and the scraper in real time, without separately setting the scraper speed. The reason for setting the speed difference between the screen basket and the scraper is that it can accurately control (calculate) the discharge amount (processing capacity) and can achieve a perfect match between the processing capacity and the dehydration effect according to the actual situation on site. The variable-frequency slurry pump is used to pressurize the material and pump the material from the mixing barrel to the coal slime centrifuge. The variable-frequency slurry pump is controlled by the control cabinet, and the feed amount of the coal slime centrifuge can be controlled by adjusting the speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] Figure 1 It is a schematic structural diagram of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the coal slime centrifuge in the present invention.

[0022] Figure 3 It is a principle block diagram of the present invention.

[0023] In the figure: 1, mixing barrel; 2, variable-frequency slurry pump; 3, coal slime centrifuge; 3-1, screen basket; 3-2, scraper; 3-3, screen basket shaft; 3-4, casing; 3-5, feed pipe; 3-6, screen basket pulley; 3-7, scraper pulley; 3-8, material distribution plate; 3-9, scraper shaft; 4, on-line moisture monitor; 5, belt weigher; 6, control cabinet; 7, first variable-frequency motor; 8, second variable-frequency motor; 9, discharge pipe; 10, discharge valve; 11, first regulating valve; 12, second regulating valve. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Specific embodiments are as Figure 1 , Figure 2 and Figure 3 shown. The adaptive adjustment coarse coal slime dewatering test system includes a coal slime centrifuge 3. The coal slime centrifuge 3 includes a screen basket 3-1, a scraper 3-2 and a driving mechanism. Both the screen basket 3-1 and the scraper 3-2 are connected to the driving mechanism. The driving mechanism includes a first variable-frequency motor 7 and a second variable-frequency motor 8. The screen basket 3-1 is connected to the output shaft of the first variable-frequency motor 7, and the scraper 3-2 is connected to the output shaft of the second variable-frequency motor 8. The system further includes a mixing barrel 1, a belt weigher 5 with one end connected to the discharge port of the coal slime centrifuge 3 and the other end connected to the feed port of the mixing barrel 1, and an on-line moisture monitor 4 arranged above the belt weigher 5. It also includes a variable-frequency slurry pump 2 and a control cabinet 6. The inlet end of the variable-frequency slurry pump 2 is communicated with the discharge port of the mixing barrel 1, and the outlet end of the variable-frequency slurry pump 2 is communicated with the feed port of the coal slime centrifuge 3. The signal output ends of the belt weigher 5 and the on-line moisture monitor 4 are both connected to the input end of the control cabinet 6. The output end of the control cabinet 6 is simultaneously connected to the controlled ends of the variable-frequency slurry pump 2, the first variable-frequency motor 7 and the second variable-frequency motor 8.

[0026] As a further improvement of the present invention, the slime centrifuge 3 further includes a casing 3-4, a feed pipe 3-5, a screen basket pulley 3-6 and a scraper pulley 3-7. The screen basket 3-1 is rotatably arranged in the casing 3-4, and the scraper 3-2 is rotatably arranged inside the screen basket 3-1. The outlet end of the feed pipe 3-5 extends into the inside of the scraper 3-2. The outlet end of the variable-frequency slurry pump 2 is communicated with the inlet end of the feed pipe 3-5. A screen basket shaft 3-3 is coaxially arranged at one end of the screen basket 3-1 away from the feed pipe 3-5, and a scraper shaft 3-9 is coaxially arranged at one end of the scraper 3-2 away from the feed pipe 3-5. The screen basket pulley 3-6 is coaxially arranged with the screen basket shaft 3-3 and fixedly connected. One end of the scraper shaft 3-9 away from the feed pipe 3-5 passes through the screen basket shaft 3-3 and is coaxially arranged and fixedly connected with the scraper pulley 3-7. The screen basket pulley 3-6 is connected to the output shaft of the first variable-frequency motor 7, and the scraper pulley 3-7 is connected to the output shaft of the second variable-frequency motor 8. The discharge port opened at the bottom of the casing 3-4 is located outside the screen basket 3-1. A liquid discharge port is opened at the bottom of the casing 3-4 corresponding to the screen basket 3-1. The slime centrifuge 3 further includes a material distribution plate 3-8 arranged inside the scraper 3-2 and coaxially arranged with the scraper shaft 3-9. The outlet end of the feed pipe 3-5 faces the material distribution plate 3-8.

[0027] As Figure 2As shown in the figure, the screen basket pulley 3-6 is installed at the right end of the screen basket shaft 3-3. The screen basket 3-1 is installed at the left end of the screen basket shaft 3-3. The screen basket shaft 3-3 is a hollow shaft. The scraper shaft 3-9 is arranged inside the screen basket shaft 3-3 through bearings. Its length is longer than that of the screen basket shaft 3-3 and it can rotate relatively freely. The right end of the scraper shaft 3-9 is equipped with a scraper pulley 3-7, and the left end is installed with a scraper 3-2. The scraper 3-2 is located inside the screen basket 3-1. Discharge holes are provided on the cone of the scraper 3-2 for the material to be discharged from the inside of the scraper 3-2 and move towards the screen basket 3-1. The first variable-frequency motor 7 drives the screen basket 3-1 to rotate through the screen basket pulley 3-6 and the screen basket shaft 3-3. The second variable-frequency motor 8 drives the scraper 3-2 to rotate synchronously through the scraper pulley 3-7 and the scraper shaft 3-9. The rotation speed of the screen basket 3-1 can be adjusted by using the first variable-frequency motor 7, and the rotation speed of the scraper 3-2 can be adjusted by using the second variable-frequency motor 8, so that there is a speed difference between the scraper 3-2 and the screen basket 3-1. The upper end of the feed pipe 3-5 is vertical for receiving materials, and the lower end of the feed pipe 3-5 is inclined so that the materials can quickly enter the inside of the scraper 3-2 from the feed pipe 3-5. The material is given an initial velocity by the distributor plate 3-8 that rotates at high speed together with the scraper 3-2, flows out from the discharge holes of the scraper 3-2, and is evenly distributed into the space between the scraper 3-2 and the screen basket 3-1. Under the action of centrifugal force, water and fine particles pass through the screen slots of the screen basket 3-1 and are discharged through the liquid discharge port. The dehydrated material adheres to the inner wall of the screen basket 3-1. Under the action of the speed difference between the scraper 3-2 and the screen basket 3-1, the inclination angle of the screen basket 3-1 and the thrust of the scraper 3-2, etc., the material moves towards the discharge port of the coal slime centrifuge 3 and falls into the discharge port and is discharged outside the machine. This dehydration process continues continuously.

[0028] As a further improvement of the present invention, the diameter of the screen basket 3-1 linearly decreases from the end close to the feed pipe 3-5 to the other end. The scraper 3-2 includes a cone with an opening facing the feed pipe 3-5 and a spiral blade wound around the outer wall of the cone. The shape of the cone matches the shape of the screen basket 3-1. As Figure 2 shown, the feed pipe 3-5 is located on the left side of the screen basket 3-1. The diameter of the screen basket 3-1 linearly decreases from left to right. The opening of the cone faces the left side, and the diameter of the cone also linearly decreases from left to right. This is more conducive to the material sliding towards the left side and then being discharged from the discharge port.

[0029] As a further improvement of the present invention, the diameter of the distributor plate 3-8 linearly increases from the end close to the feed pipe 3-5 to the other end. As Figure 2 shown. This can make the material have a large enough contact area with the distributor plate 3-8 and is more conducive to the material spreading outwards and then entering the screen basket 3-1 through the discharge holes on the cone of the scraper 3-2.

[0030] As a further improvement of the present invention, the diameter of the lower end of the mixing barrel 1 linearly decreases from top to bottom. As Figure 1As shown, this can ensure that all the materials in the mixing barrel 1 can be discharged, avoiding material residue in the mixing barrel 1.

[0031] As a further improvement to the present invention, a first regulating valve 11 is connected between the inlet end of the variable-frequency slurry pump 2 and the discharge port of the mixing barrel 1, and a second regulating valve 12 is connected between the outlet end of the variable-frequency slurry pump 2 and the feed port of the coal slime centrifuge 3. As Figure 1 shown, the first regulating valve 11 can be used to adjust the flow rate of the material entering the variable-frequency slurry pump 2, and the second regulating valve 12 can be used to adjust the flow rate of the material returning to the coal slime centrifuge 3, better meeting the dewatering requirements. The controlled ends of the first regulating valve 11 and the second regulating valve 12 are both connected to the control cabinet 6. By setting the parameters of the control cabinet 6, the flow rates of the first regulating valve 11 and the second regulating valve 12 can be adjusted, eliminating the manual adjustment process and achieving higher adjustment accuracy.

[0032] As a further improvement to the present invention, the system further includes a discharge pipe 9 communicating with the discharge port of the mixing barrel 1, and a discharge valve 10 is provided on the discharge pipe 9. As Figure 1 shown, the discharge valve 10 can be used to adjust the flow rate during the discharge of the mixing barrel 1, better meeting the discharge requirements. The controlled end of the discharge valve 10 is connected to the control cabinet 6. By setting the parameters of the control cabinet 6, the flow rate of the discharge valve 10 can be adjusted, eliminating the manual adjustment process and achieving higher adjustment accuracy.

[0033] As a further improvement to the present invention, the gap between the scraper 3-2 and the screen basket 3-1 is 5-15 mm, which not only enables the dehydrated material to be smoothly scraped off, but also avoids the scraper 3-2 directly contacting the screen basket 3-1 and causing wear to it.

[0034] Example 1. The test method of the adaptive adjustment coarse coal slime dewatering test system includes the following steps:

[0035] A. The on-line moisture monitor 4 sends the detected data to the control cabinet 6;

[0036] B. The control cabinet 6 compares the received real-time moisture data with the set moisture data. The rotation speed of the scraper 3-2 is always greater than that of the screen basket 3-1. When the real-time moisture data is greater than the set moisture data, the control cabinet 6 issues an instruction to increase the rotation speed of the screen basket 3-1 through the first variable-frequency motor 7, reducing the rotation speed difference between the screen basket 3-1 and the scraper 3-2, so as to increase the centrifugal force, increase the residence time of the material in the screen basket 3-1, extend the dewatering time, and achieve the purpose of reducing the product moisture; when the real-time moisture data is less than the set moisture data, the control cabinet 6 issues an instruction to reduce the rotation speed of the screen basket 3-1 through the first variable-frequency motor 7, increasing the rotation speed difference between the screen basket 3-1 and the scraper 3-2, so as to save energy and reduce consumption and accelerate the discharge.

[0037] Example 2. The test method of the adaptive regulation coarse slime dewatering test system includes the following steps:

[0038] A. The online moisture monitor 4 sends the detected data to the control cabinet 6, and the belt scale 5 sends the detected data to the control cabinet 6;

[0039] B. The control cabinet 6 compares the received real-time moisture data with the set moisture data. At the same time, the control cabinet 6 compares the received real-time discharge amount data with the set discharge amount data. The rotation speed of the scraper 3-2 is always greater than that of the screen basket 3-1. When the real-time discharge amount data is less than the set discharge amount data, the control cabinet 6 issues an instruction to increase the rotation speed of the variable-frequency slurry pump 2 to increase the feed amount. The increase in the feed amount may cause the product moisture to rise. When the real-time moisture data is greater than the set moisture data, the control cabinet 6 issues an instruction to increase the rotation speed of the screen basket 3-1 through the first variable-frequency motor 7, reduce the rotation speed difference between the screen basket 3-1 and the scraper 3-2, so as to increase the centrifugal force, increase the residence time of the material in the screen basket 3-1, extend the dewatering time, and achieve the purpose of reducing the product moisture; when the real-time discharge amount data is greater than the set discharge amount data, the control cabinet 6 issues an instruction to reduce the rotation speed of the variable-frequency slurry pump 2 to reduce the feed amount. The reduction in the feed amount may cause the product moisture to decrease. When the real-time moisture data is less than the set moisture data, the control cabinet 6 issues an instruction to reduce the rotation speed of the screen basket 3-1 through the first variable-frequency motor 7, increase the rotation speed difference between the screen basket 3-1 and the scraper 3-2, so as to save energy and reduce consumption and speed up the discharge.

[0040] The present invention has two test methods, namely Example 1 and Example 2. The control cabinet can be used to select any one of the two test methods. After selection, the test system runs continuously and adaptively adjusts the rotation speed of the screen basket in real time, thereby changing the rotation speed difference between the screen basket and the scraper until the real-time moisture data is equal to the set moisture data (or the real-time moisture data is equal to the set moisture data and the real-time discharge amount data is equal to the set discharge amount data), then a relatively stable state is reached. The centrifuge operation parameters in this stable state are the optimal dewatering parameters for this material, providing test data for the parameterized customization of the centrifuge and the selection of on-site application parameters. Moreover, the adaptive regulation coarse slime dewatering test method and intelligent system of the present invention can be applied to an intelligent coal washing plant, improving the accuracy of coarse slime dewatering and the intelligent level of the overall coal washing plant, and being able to achieve a perfect match between the processing capacity and the dewatering effect according to the actual situation on site.

Claims

1. Test method for the adaptive adjustment coarse slime dewatering test system, characterized in that: The system includes a slime centrifuge (3). The slime centrifuge (3) includes a screen basket (3-1), a scraper (3-2) and a driving mechanism. Both the screen basket (3-1) and the scraper (3-2) are connected to the driving mechanism. The driving mechanism includes a first variable-frequency motor (7) and a second variable-frequency motor (8). The screen basket (3-1) is connected to the output shaft of the first variable-frequency motor (7), and the scraper (3-2) is connected to the output shaft of the second variable-frequency motor (8). The system also includes a mixing tank (1), a belt scale (5) with one end connected to the discharge port of the slime centrifuge (3) and the other end connected to the feed port of the mixing tank (1), and an on-line moisture monitor (4) arranged above the belt scale (5). It further includes a variable-frequency slurry pump (2) and a control cabinet (6). The inlet end of the variable-frequency slurry pump (2) is communicated with the discharge port of the mixing tank (1), and the outlet end of the variable-frequency slurry pump (2) is communicated with the feed port of the slime centrifuge (3). The signal output ends of the belt scale (5) and the on-line moisture monitor (4) are both connected to the input end of the control cabinet (6). The output end of the control cabinet (6) is simultaneously connected to the controlled ends of the variable-frequency slurry pump (2), the first variable-frequency motor (7) and the second variable-frequency motor (8); The test method includes the following steps: A. The on-line moisture monitor (4) conducts real-time moisture monitoring on the product discharged from the slime centrifuge (3) onto the belt scale (5) and sends the detected moisture data to the control cabinet (6). The belt scale (5) conducts real-time weighing on the discharged material and sends the detected discharged material quantity data to the control cabinet (6); B. The control cabinet (6) compares the received real-time moisture data with the set moisture data. When the real-time moisture data is greater than the set moisture data, the control cabinet (6) issues an instruction to increase the rotational speed of the screen basket (3-1) through the first variable-frequency motor (7) and reduce the rotational speed difference between the screen basket (3-1) and the scraper (3-2). When the real-time moisture data is less than the set moisture data, the control cabinet (6) issues an instruction to reduce the rotational speed of the screen basket (3-1) through the first variable-frequency motor (7) and increase the rotational speed difference between the screen basket (3-1) and the scraper (3-2). The control cabinet (6) compares the received real-time discharged material quantity data with the set discharged material quantity data. When the real-time discharged material quantity data is less than the set discharged material quantity data, the control cabinet (6) issues an instruction to increase the rotational speed of the variable-frequency slurry pump (2) and increase the feed quantity. When the real-time discharged material quantity data is greater than the set discharged material quantity data, the control cabinet (6) issues an instruction to reduce the rotational speed of the variable-frequency slurry pump (2) and reduce the feed quantity.

2. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 1, characterized in that: The slime centrifuge (3) further includes a casing (3-4), a feed pipe (3-5), a screen basket pulley (3-6) and a scraper pulley (3-7). The screen basket (3-1) is rotatably arranged inside the casing (3-4), and the scraper (3-2) is rotatably arranged inside the screen basket (3-1). The outlet end of the feed pipe (3-5) extends into the inside of the scraper (3-2). The outlet end of the variable-frequency slurry pump (2) is communicated with the inlet end of the feed pipe (3-5). One end of the screen basket (3-1) far from the feed pipe (3-5) is coaxially provided with a screen basket shaft (3-3), and one end of the scraper (3-2) far from the feed pipe (3-5) is coaxially provided with a scraper shaft (3-9). The screen basket pulley (3-6) is coaxially arranged and fixedly connected with the screen basket shaft (3-3). One end of the scraper shaft (3-9) far from the feed pipe (3-5) passes through the screen basket shaft (3-3) and is coaxially arranged and fixedly connected with the scraper pulley (3-7). The screen basket pulley (3-6) is connected with the output shaft of the first variable-frequency motor (7), and the scraper pulley (3-7) is connected with the output shaft of the second variable-frequency motor (8). The discharge port opened at the bottom of the casing (3-4) is located outside the screen basket (3-1). A liquid discharge port is opened at the bottom of the casing (3-4) corresponding to the screen basket (3-1). The slime centrifuge (3) further includes a material distribution plate (3-8) arranged inside the scraper (3-2) and coaxially arranged with the scraper shaft (3-9). The outlet end of the feed pipe (3-5) faces the material distribution plate (3-8).

3. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 2, characterized in that: The diameter of the screen basket (3-1) linearly decreases from the end close to the feed pipe (3-5) to the other end. The scraper (3-2) includes a cone with an opening facing the feed pipe (3-5) and a spiral blade wound around the outer wall of the cone. The shape of the cone matches the shape of the screen basket (3-1).

4. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 2, characterized in that: The diameter of the material distribution plate (3-8) linearly increases from the end close to the feed pipe (3-5) to the other end.

5. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 1, characterized in that: The diameter of the lower end of the mixing barrel (1) linearly decreases from top to bottom.

6. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 1, characterized in that: A first regulating valve (11) is connected between the inlet end of the variable-frequency slurry pump (2) and the discharge port of the mixing barrel (1), and a second regulating valve (12) is connected between the outlet end of the variable-frequency slurry pump (2) and the feed port of the slime centrifuge (3).

7. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 1, characterized in that: The system further includes a discharge pipe (9) communicated with the discharge port of the mixing barrel (1), and a discharge valve (10) is arranged on the discharge pipe (9).

8. The test method for the adaptive adjustment coarse slime dewatering test system according to claim 1, characterized in that: The gap between the scraper (3-2) and the screen basket (3-1) is 5-15 mm.

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