Abrasive material recycling and sorting system of high-pressure water jet sand blasting cleaning equipment

Abstract

The abrasive recycling and sorting system comprises a main box body and an auxiliary box body, the side face of a cleaning machine box of the high-pressure water jet sand blasting cleaning equipment is provided with an overflow opening used for allowing cleaning liquid containing abrasives to flow out, and a flow guide groove is formed in the upper portion of the inner side face of the main box body; a flow guide groove is formed in the main box body, a screen is arranged at an outlet of the flow guide groove, the overflow port is located above the flow guide groove, the main box body and the auxiliary box body are communicated through an overflow channel, a slurry pump is connected to the main box body, a cyclone is connected to an outlet of the slurry pump, and a sand settling port of the cyclone extends into the cleaning machine box. According to the abrasive recovery and separation system, the abrasive can be rapidly and stably recovered in the sand blasting process, and normal and stable operation of sand blasting equipment is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of grinding technology, and in particular relates to an abrasive recycling and sorting system. Background Technology

[0002] With the application of high-pressure water jet sandblasting equipment in steel plants across the country, the method of removing scale from the surface of sheet and strip using high-pressure water jet sandblasting technology is gradually replacing chemical, mechanical, and shot blasting processes or methods, and the development of larger-scale equipment is also becoming a trend. The larger the equipment, the larger the area of ​​sheet and strip that needs to be cleaned, the greater the amount of abrasive used during sandblasting, the more oxide scale is generated after cleaning, and the more useless fine-grained abrasive particles need to be sorted out.

[0003] In existing high-pressure water jet blasting equipment, the abrasive circulating inside the equipment is typically hydraulically transported using a jet pump. The abrasive generated after descaling first settles at the bottom of the cleaning chamber, and is then pumped by the jet pump at the bottom of the chamber to an abrasive tank at the top. Finally, it is supplied to the descaling nozzle for reuse through a sand supply pipe at the bottom of the abrasive tank. The oxide scale and useless fine-grained abrasive generated during the cleaning process are usually carried out of the cleaning chamber by the water overflow generated by the descaling nozzle and jet pump, and then discharged into a sedimentation tank.

[0004] However, due to the large volume of overflow water, abrasive particles scatter throughout the cleaning machine during sandblasting, resulting in a significant amount of usable abrasive particles flowing out with the overflow water. If these usable particles are to be collected and sorted in a sedimentation tank, the process becomes difficult and costly. Therefore, a stable and rapid method for abrasive particle recovery is urgently needed to ensure that all abrasive particles are effectively recovered during sandblasting, guaranteeing the normal and stable operation of the high-pressure water jet sandblasting equipment and reducing operating costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the background art above, and to provide an abrasive recovery and sorting system for high-pressure water jet sandblasting cleaning equipment. This abrasive recovery and sorting system can realize the rapid and stable recovery of abrasives during the sandblasting process, and ensure the normal and stable operation of the sandblasting equipment.

[0006] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0007] A high-pressure water jet sandblasting cleaning equipment abrasive recovery and sorting system includes a main housing and a secondary housing. The cleaning housing of the high-pressure water jet sandblasting cleaning equipment has an overflow port on its side for the abrasive-containing cleaning fluid to flow out. A guide channel is provided on the upper side of the inner side of the main housing, and a screen is provided at the outlet of the guide channel. The overflow port is located above the guide channel. The main housing and the secondary housing are connected through an overflow channel. A slurry pump is connected to the main housing, and a hydrocyclone is connected to the outlet of the slurry pump. The sand settling port of the hydrocyclone extends into the cleaning housing.

[0008] In the aforementioned abrasive recycling and sorting system, preferably, the main housing is a rectangular prism at the top and an inverted conical container that slopes inwards from all four sides at the bottom. The guide channel has a figure-7 shape and is arranged along the inner side of one long side and one short side of the main housing. The guide channel includes a side plate and a guide plate, with the guide plate located between the inner wall of the main housing and the side plate. The screen is located at the outlet end of the guide plate. The screen located at the outlet end of the guide plate not only quickly separates air bubbles in the water, allowing the sand and water to flow down rapidly, but also blocks and cleans large debris discharged from the machine housing.

[0009] In the aforementioned abrasive recovery and sorting system, preferably, the screen is located on one side of a short side at the upper end of the main housing, and the overflow channel is located on the other short side at the upper end of the main housing. This effectively achieves rapid sedimentation and separation of the liquid-solid mixture such as sand, water, and scale exiting the cleaning chamber. The heavier steel shot quickly settles to the bottom of the main housing and is rapidly recovered by the slurry pump. After further separation by the hydrocyclone, the effective steel shot is recovered back to the cleaning chamber, while the lighter scale and other materials enter the auxiliary chamber with the overflow water and are then pumped to the sedimentation chamber via pipeline pump. The overflow channel is 10-15cm higher than the bottom of the guide channel. At this time, the water level of the main tank overflowing is higher than the bottom of the 7-shaped guide channel. By using the 7-shaped guide channel to guide the flow and the high liquid level to separate the air bubbles, the gas in the gas-liquid-solid mixture such as sand, water, and oxide scale coming out of the cleaning machine box is quickly separated. This ensures that when the water, sand, and oxide scale mixture in the cleaning machine box flows into the 7-shaped guide channel from the overflow outlet, the gas generated in the process can be discharged in time, avoiding the gas from entering the slurry pump and affecting its operation.

[0010] In the aforementioned abrasive recovery and sorting system, preferably, the slurry pump is connected to the main housing via a slurry pump inlet pipe, which passes through the middle of the lower side of the main housing and extends downwards into the bottom of the main housing. The outlet of the slurry pump is connected to the hydrocyclone feed port of the hydrocyclone via a connecting pipe, and the hydrocyclone overflow port is connected to the sedimentation tank. The hydrocyclone feed port is connected to the slurry pump outlet via a connecting pipe, and the overflow port of the hydrocyclone discharges overflow water to the sedimentation tank via a pipe. The sand settling port below the hydrocyclone extends into the cleaning chamber, realizing the separation of the water, sand, and scale mixture within the cleaning chamber, as well as the recovery of sand.

[0011] In the aforementioned abrasive recycling and sorting system, preferably, a pipeline pump is connected to the lower side of the auxiliary housing via a pipeline pump inlet pipe, and the outlet of the pipeline pump is connected to a sedimentation tank. The shape of the auxiliary housing can be similar to that of the main housing. Impurities in the auxiliary housing can be transported to the sedimentation tank for treatment via the pipeline pump.

[0012] In the aforementioned abrasive recycling and sorting system, preferably, both the main housing and the auxiliary housing are equipped with a main housing partition and an auxiliary housing partition, respectively. The main housing partition is installed on the top area of ​​the main housing, excluding the 7-shaped guide channel, to prevent large debris from entering the main housing and clogging the slurry pump. The auxiliary housing partition is installed on the top to prevent large debris from entering the auxiliary housing and clogging the pipeline pump.

[0013] In the aforementioned abrasive recycling and sorting system, preferably, an automatic start-stop control device for the slurry pump is vertically installed inside the main housing. This device includes a first high-level electrode, a first low-level electrode, and a first common electrode. These electrodes are sequentially and fixedly mounted on a first insulating rod at 10-14 cm intervals from top to bottom. The electrodes are insulated from each other. The first high-level electrode is below the lowest point of the overflow channel, and the first common electrode is always submerged in water. This automatic start-stop control device enables the start and stop control of the slurry pump.

[0014] In the aforementioned abrasive recycling and sorting system, preferably, a first protective cylinder is fitted over the first insulating fixing rod. The upper end of the first protective cylinder is open and higher than the liquid level in the main tank. The lower end of the first protective cylinder is open and communicates with the liquid in the main tank. The water level inside the first protective cylinder changes in the same direction as the water level in the main tank, but air bubbles on the water surface will not enter the first protective cylinder. This prevents air bubbles generated during the flow of water containing rust inhibitor from floating on the surface and causing the first high-water-level electrode and the first low-water-level electrode to malfunction.

[0015] In the aforementioned abrasive recycling and sorting system, preferably, an automatic start-stop control device for the pipeline pump is vertically installed inside the auxiliary housing. This device includes a second high-level electrode, a second low-level electrode, and a second common electrode. These electrodes are sequentially fixed to a second insulating rod at 10-14 cm intervals from top to bottom. The second high-level electrode, the second low-level electrode, and the second common electrode are insulated from each other. The second high-level electrode is lower than the lowest point of the overflow channel, and the second common electrode is always submerged in water. This automatic start-stop control device can control the start and stop of the slurry pump.

[0016] In the aforementioned abrasive recycling and sorting system, preferably, a second protective cylinder is fitted over the second insulating fixing rod. The upper end of the second protective cylinder is open, and this opening is higher than the liquid level inside the auxiliary tank. The lower end of the second protective cylinder is open and communicates with the liquid inside the auxiliary tank. The water level inside the second protective cylinder changes in the same direction as the water level inside the auxiliary tank, but air bubbles on the water surface will not enter the second protective cylinder. This prevents air bubbles generated during the flow of water containing rust inhibitor from floating on the surface and causing the second high-level electrode and the second low-level electrode to malfunction.

[0017] In the above-mentioned abrasive recycling and sorting system, preferably, the water flow rate Q1 flowing out of the overflow outlet is greater than the flow rate Q2 of the slurry pump, and the flow rate Q3 of the pipeline pump is greater than Q1-Q2. During normal operation, the water level in the main tank is always at the overflow level, which is higher than the lowest point of the overflow channel, and the slurry pump is always in the open state; the pipeline pump is in the intermittent open state.

[0018] In the aforementioned abrasive recycling and sorting system, preferably, the slurry pump is turned on when the water level in the main tank is higher than the first high water level electrode; and the slurry pump is turned off when the water level in the main tank is lower than the first low water level electrode. Similarly, the pipeline pump is turned on when the water level in the auxiliary tank is higher than the second high water level electrode; and the pipeline pump is turned off when the water level in the auxiliary tank is lower than the second low water level electrode.

[0019] The abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment of the present invention has a clever and compact layout of the main box and the auxiliary box. The main casing is designed with a 7-shaped guide channel and an overflow channel whose lowest point is higher than the bottom of the 7-shaped guide channel. Utilizing the 7-shaped guide channel for flow guidance and high-level separation of air bubbles, rapid separation of gas from the gas-liquid-solid mixture of sand, water, and scale exiting the cleaning chamber is achieved, preventing air bubbles from entering the slurry pump and affecting its operation. The main casing also features a screen on one short side, a slurry pump inlet pipe in the middle, and an overflow channel on the opposite short side. This effectively facilitates the rapid sedimentation and separation of the liquid-solid mixture of sand, water, and scale exiting the cleaning chamber. Heavy steel sand quickly settles to the bottom of the main casing and is rapidly recovered by the slurry pump. Further separation by a hydrocyclone returns the remaining steel sand to the cleaning chamber, while lighter materials like scale are carried by the overflow water into the auxiliary casing and then pumped to the sedimentation tank via a pipeline pump. In addition, both the main and auxiliary tanks are equipped with automatic start-stop control devices with protective sleeves, which can effectively realize the precise start-stop and efficient utilization of slurry pumps and pipeline pumps, thereby achieving continuous and stable recovery of steel shot and reliable discharge of wastewater containing oxide scale during the cleaning operation.

[0020] Compared with the prior art, the advantages of the present invention are as follows: The abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment of the present invention has a clever and compact layout of the main box and the auxiliary box. The main box is designed with a guide channel to guide and separate air bubbles, thereby realizing the rapid separation of gas in the gas-liquid-solid mixture such as sand, water, and oxide scale coming out of the cleaning machine box, and avoiding the entry of air bubbles into the slurry pump and affecting its operation.

[0021] The abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment of the present invention effectively realizes the rapid sedimentation and separation of liquid-solid mixtures such as sand, water, and oxide scale from the cleaning chamber. The heavy steel sand quickly settles to the bottom of the main chamber and is quickly recovered by the slurry pump. After further separation by the hydrocyclone, the effective steel sand is recovered back to the cleaning chamber, while the light oxide scale and other materials enter the auxiliary chamber with the overflow water and are then pumped to the sedimentation tank through the pipeline pump. This effectively solves the problems of how to quickly and effectively recover and utilize the effective abrasive after it flows out with the overflow water during sandblasting and how to quickly separate the wastewater containing oxide scale, without occupying a large land area.

[0022] The abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment of the present invention has advantages such as simple and compact structure, stable and reliable system, and economical cost. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional diagram of the abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment in this embodiment; Figure 2 yes Figure 1 View excluding the main enclosure mesh and the auxiliary enclosure mesh; Figure 3 This is a front view of the abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment in this embodiment; Figure 4 yes Figure 3 The left view; Figure 5 yes Figure 4 Top view; Figure 6 yes Figure 5 View excluding the main enclosure mesh and the auxiliary enclosure mesh; Figure 7 yes Figure 5 CC section view; Figure 8 yes Figure 7 View without the protective casing.

[0025] Legend 1. Main tank; 11. Flow guide channel; 111. Side plate; 112. Flow guide plate; 113. Screen; 12. Automatic start / stop control device for slurry pump; 121. First high water level electrode; 122. First low water level electrode; 123. First common electrode; 13. Overflow channel; 14. Main tank partition; 2. Auxiliary tank; 21. Automatic start / stop control device for pipeline pump; 211. Second high water level electrode; 212. Second low water level electrode 1. Electrode; 213. Second common electrode; 22. Auxiliary box partition; 3. Cleaning box; 31. Overflow port; 4. Slurry pump; 41. Slurry pump inlet pipe; 42. Connecting pipe; 5. Pipeline pump; 51. Pipeline pump inlet pipe; 6. Hydrocyclone; 61. Hydrocyclone feed port; 62. Sand settling port; 63. Hydrocyclone overflow port; 7. First insulating fixing rod; 8. First protective cylinder; 9. Second insulating fixing rod; 10. Second protective cylinder. Detailed Implementation

[0026] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0027] It should be noted that when a component is described as being "fixed to, attached to, connected to or connected to" another component, it can be directly fixed to, attached to, connected to or connected to the other component, or it can be indirectly fixed to, attached to, connected to or connected to the other component through other intermediate connectors.

[0028] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0029] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0030] Example: like Figures 1-8 As shown, the abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment in this embodiment includes a main housing 1 and a secondary housing 2. The cleaning chamber 3 of the high-pressure water jet sandblasting cleaning equipment (the abrasive at the bottom of the cleaning chamber 3 is directly pumped to the abrasive tank by the jet pump and directly supplied to the descaling nozzle) has an overflow port 31 on its side for the cleaning liquid containing abrasive to flow out. A guide channel 11 is provided on the upper side of the inner side of the main housing 1. A screen 113 is provided at the outlet of the guide channel 11. The overflow port 31 is located above the guide channel 11. The main housing 1 and the secondary housing 2 are connected through an overflow channel 13. A slurry pump 4 is connected to the main housing 1. A hydrocyclone 6 is connected to the outlet of the slurry pump 4. The sand settling port 62 of the hydrocyclone 6 extends into the cleaning chamber 3.

[0031] In this embodiment, both the main box 1 and the auxiliary box 2 are cuboids at the top and inverted conical containers that slope inwards from all four sides at the bottom. The guide channel 11 has a 7-shaped structure and is arranged along the inner side of one long side and one short side of the main box 1. The guide channel 11 includes a side plate 111 and a guide plate 112. The guide plate 112 is located between the inner wall of the main box 1 and the side plate 111. The screen 113 is located at the outlet end of the guide plate 112.

[0032] In this embodiment, the screen 113 is located on one side of one short side of the upper end of the main box 1, and the overflow channel 13 is located on one side of the other short side of the upper end of the main box 1; the lowest point of the overflow channel 13 is 10-15cm higher than the bottom of the guide channel 11 (any of the above ranges are acceptable, such as 10cm, 12cm, or 15cm).

[0033] In this embodiment, the slurry pump 4 is connected to the main housing 1 through a slurry pump inlet pipe 41. The slurry pump inlet pipe 41 passes through the middle of the lower side of the main housing 1 and extends downward into the bottom of the main housing 1. The outlet of the slurry pump 4 is connected to the hydrocyclone feed port 61 of the hydrocyclone 6 through a connecting pipe 42. The hydrocyclone overflow port 63 of the hydrocyclone 6 is connected to the sedimentation tank.

[0034] In this embodiment, the lower side of the auxiliary tank 2 is connected to a pipeline pump 5 via a pipeline pump inlet pipe 51, and the outlet of the pipeline pump 5 is connected to the sedimentation tank.

[0035] In this embodiment, a main box partition 14 is provided on the top of the main box 1, except for the 7-shaped guide channel 11, and a secondary box partition 22 is provided on the top of the secondary box 2.

[0036] like Figure 7 , Figure 8 As shown, in this embodiment, an automatic start-stop control device 12 for a slurry pump is vertically installed inside the main tank 1. The automatic start-stop control device 12 for the slurry pump includes a first high-level electrode 121, a first low-level electrode 122, and a first common electrode 123. The first high-level electrode 121, the first low-level electrode 122, and the first common electrode 123 are fixedly mounted on a first insulating rod 7 at intervals of 10-14 cm from top to bottom. The first high-level electrode 121, the first low-level electrode 122, and the first common electrode 123 are kept insulated from each other. The first high-level electrode 121 is lower than the lowest point of the overflow channel 13, and the first common electrode 123 is always submerged in water. A first protective cylinder 8 is fitted over the first insulating rod 7. The upper end of the first protective cylinder 8 is open and higher than the liquid level inside the main tank 1. The lower end of the first protective cylinder 8 is open and communicates with the liquid inside the main tank 1. In this embodiment, when the water level in the main tank 1 is higher than the first high water level electrode 121, the slurry pump 4 is turned on; when the water level in the main tank 1 is lower than the first low water level electrode 122, the slurry pump 4 is turned off.

[0037] like Figure 7 , Figure 8As shown, in this embodiment, an automatic start / stop control device 21 for the pipeline pump is vertically installed inside the auxiliary tank 2. The automatic start / stop control device 21 for the pipeline pump includes a second high water level electrode 211, a second low water level electrode 212, and a second common electrode 213. The second high water level electrode 211, the second low water level electrode 212, and the second common electrode 213 are fixedly mounted on a second insulating fixing rod 9 at intervals of 10-14 cm from top to bottom. The second high water level electrode 211, the second low water level electrode 212, and the second common electrode 213 are kept insulated from each other. The second high water level electrode 211 is lower than the lowest point of the overflow channel 13, and the second common electrode 213 is always submerged in water. A second protective cylinder 10 is fitted over the second insulating fixing rod 9. The upper end of the second protective cylinder 10 is open and is higher than the liquid level inside the auxiliary tank 2. The lower end of the second protective cylinder 10 is open and communicates with the liquid inside the auxiliary tank 2. In this embodiment, when the water level in the secondary tank 2 is higher than the second high water level electrode 211, the pipeline pump 5 is turned on; when the water level in the secondary tank 2 is lower than the second low water level electrode 212, the pipeline pump 5 is turned off.

[0038] In this embodiment, the water flow rate Q1 flowing out of the overflow outlet 31 is greater than the flow rate Q2 of the slurry pump 4, and the flow rate Q3 of the pipeline pump 5 is greater than Q1-Q2. During normal operation, the water level in the main tank 1 is always at the overflow level, which is higher than the lowest point of the overflow channel 13, and the slurry pump 4 is always in the open state; the pipeline pump 5 is in the intermittent open state.

[0039] The abrasive recovery and sorting system of the high-pressure water jet sandblasting cleaning equipment in this embodiment effectively realizes the rapid sedimentation and separation of liquid-solid mixtures such as sand, water, and scale coming out of the cleaning chamber 3. The heavy steel sand quickly settles to the bottom of the main chamber 1 and is quickly recovered by the slurry pump 4. After further separation by the hydrocyclone 6, the effective steel sand is recovered back to the cleaning chamber 3, while the light scale and other materials enter the auxiliary chamber 2 with the overflow water and are then discharged to the sedimentation tank by the pipeline pump 5. This effectively solves the problems of how to quickly and effectively recover and utilize the effective abrasive after it flows out with the overflow water during sandblasting and how to quickly separate the wastewater containing scale, without occupying a large land area.

Claims

1. An abrasive recovery and sorting system for a high-pressure water jet sandblasting cleaning device, characterized in that, The equipment includes a main housing (1) and a secondary housing (2). The cleaning chamber (3) of the high-pressure water jet sandblasting cleaning equipment has an overflow port (31) on its side for the cleaning fluid containing abrasive to flow out. A guide channel (11) is provided on the upper side of the inner side of the main housing (1). A screen (113) is provided at the outlet of the guide channel (11). The overflow port (31) is located above the guide channel (11). The main housing (1) and the secondary housing (2) are connected through an overflow channel (13). A slurry pump (4) is connected to the main housing (1). A hydrocyclone (6) is connected to the outlet of the slurry pump (4). The sand outlet (62) of the hydrocyclone (6) extends into the cleaning chamber (3).

2. The abrasive recycling and sorting system according to claim 1, characterized in that, The main box (1) is a cuboid at the top and an inverted cone-shaped container that slopes inwards from the bottom. The guide channel (11) has a 7-shaped structure and is arranged along the inner side of one long side and one short side of the main box (1). The guide channel (11) includes a side plate (111) and a guide plate (112). The guide plate (112) is located between the inner wall of the main box (1) and the side plate (111). The screen (113) is located at the outlet end of the guide plate (112).

3. The abrasive recycling and sorting system according to claim 2, characterized in that, The screen (113) is located on one side of a short side at the upper end of the main box (1), and the overflow channel (13) is located on one side of the other short side at the upper end of the main box (1); the lowest point of the overflow channel (13) is 10-15cm higher than the bottom of the guide groove (11).

4. The abrasive recycling and sorting system according to claim 1, characterized in that, The slurry pump (4) is connected to the main housing (1) through a slurry pump inlet pipe (41). The slurry pump inlet pipe (41) passes through the middle of the lower side of the main housing (1) and extends downward into the bottom of the main housing (1). The outlet of the slurry pump (4) is connected to the hydrocyclone feed port (61) of the hydrocyclone (6) through a connecting pipe (42). The hydrocyclone overflow port (63) of the hydrocyclone (6) is connected to the sedimentation tank.

5. The abrasive recycling and sorting system according to claim 1, characterized in that, The lower side of the sub-box (2) is connected to a pipeline pump (5) via a pipeline pump inlet pipe (51), and the outlet of the pipeline pump (5) is connected to the sedimentation tank.

6. The abrasive recycling and sorting system according to claim 1, characterized in that, The top of the main box (1) and the auxiliary box (2) are respectively provided with a main box partition (14) and an auxiliary box partition (22).

7. The abrasive recycling and sorting system according to claim 1, characterized in that, The main housing (1) is vertically equipped with an automatic start-stop control device (12) for a slurry pump. The automatic start-stop control device (12) for the slurry pump includes a first high water level electrode (121), a first low water level electrode (122), and a first common electrode (123). The first high water level electrode (121), the first low water level electrode (122), and the first common electrode (123) are fixedly mounted on a first insulating rod (7) at intervals of 10-14cm from top to bottom. The first high water level electrode (121), the first low water level electrode (122), and the first common electrode (123) are kept insulated from each other. The first high water level electrode (121) is lower than the lowest point of the overflow channel (13), and the first common electrode (123) is always submerged in water.

8. The abrasive recycling and sorting system according to claim 7, characterized in that, The first insulating fixing rod (7) is covered with a first protective cylinder (8). The upper end of the first protective cylinder (8) is open and the upper end opening is higher than the liquid level in the main box (1). The lower end of the first protective cylinder (8) is open and communicates with the liquid in the main box (1).

9. The abrasive recycling and sorting system according to claim 1, characterized in that, The auxiliary housing (2) is vertically equipped with an automatic start-stop control device (21) for the pipeline pump. The automatic start-stop control device (21) for the pipeline pump includes a second high water level electrode (211), a second low water level electrode (212), and a second common electrode (213). The second high water level electrode (211), the second low water level electrode (212), and the second common electrode (213) are fixedly mounted on a second insulating fixing rod (9) at intervals of 10-14cm from top to bottom. The second high water level electrode (211), the second low water level electrode (212), and the second common electrode (213) are kept insulated from each other. The second high water level electrode (211) is lower than the lowest point of the overflow channel (13), and the second common electrode (213) is always submerged in water.

10. The abrasive recycling and sorting system according to claim 9, characterized in that, The second insulating fixing rod (9) is covered with a second protective cylinder (10). The upper end of the second protective cylinder (10) is open and the upper end opening is higher than the liquid level in the sub-box (2). The lower end of the second protective cylinder (10) is open and communicates with the liquid in the sub-box (2).

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