A high-performance device and method for screening, recycling and utilization of heavy metal waste residue

Abstract

The present invention relates to the technical field of recycling of heavy metal waste residues, and specifically discloses a high-performance device and method for screening and recycling heavy metal waste residues, including a waste residue treatment system and a screening system. The waste residue treatment system includes a box body and a rotary drum, and the screening system includes an inclined screening rail and a support frame. By arranging a rotary drum in the form of a turntable inside the waste residue treatment system to treat the heavy metal waste residues, the working efficiency of the entire device is improved; by arranging a circulation tank and a drainage tank inside the waste residue treatment system, on the one hand, it is convenient for the recycling of liquid reagents, which is more energy-saving, and on the other hand, the liquid reagents remaining on the surface of the heavy metal waste residues during the standing process can also be removed, while the heavy metal waste residues in the discharge tank below can still be soaked by the liquid reagents and undergo reaction treatment, and the treatment efficiency is higher.

Description

Technical Field

[0001] The present invention relates to a high-performance device and method for screening, recycling and utilization of heavy metal waste residue, belonging to the technical field of recycling and utilization of heavy metal waste residue. Background Art

[0002] With the rapid development of basic industries such as mining and metallurgy, a large amount of industrial waste residues such as tailings, red mud, and fly ash are discharged. In the process of resource utilization of industrial waste residues, harmless treatment of their heavy metals is required. Since heavy metal waste residues contain recyclable materials inside, screening, recycling and utilization devices need to be used for treatment and then recycling. Existing screening, recycling and utilization devices generally first use a waste residue treatment system to treat heavy metal waste residues with reagents and medicaments, and then transfer them to a screening system for layer-by-layer screening.

[0003] However, there are still certain defects in the use of existing such devices. First of all, every time heavy metal waste residues are added, the waste residue treatment system needs to be closed once, and continuous treatment cannot be achieved, thus greatly reducing the work efficiency. On the other hand, after the waste residue treatment system treats heavy metal waste residues with reagents and medicaments, the treated waste residues need to be transferred to the screening system for screening. During the transfer process, since the waste residues still remain with reagents and moisture, directly discharging them into the screening system for screening will cause waste of reagents on the one hand, and on the other hand, the reagents will damage the screening system after entering the screening system. Some existing such devices have the function of draining the waste residues during transfer, but often drain after transfer, which is not conducive to the recovery and recycling of liquid reagents. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a high-performance device and method for screening, recycling and utilization of heavy metal waste residue.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A high-performance device for screening, recycling and utilization of heavy metal waste residue includes a waste residue treatment system and a screening system. The waste residue treatment system is arranged on the top of a fixed frame, and the screening system is fixed on the top of a support. The support is located on one side of the fixed frame, and the screening system is located on the bottom side wall of the waste residue treatment system;

[0007] The waste residue treatment system includes a box body and a rotary drum. The rotary drum is rotatably installed inside the box body. The top of the box body is provided with a detachable sealing cover, and the side wall of the box body is provided with an openable and closable side door. A side box is fixed on the side wall of the box body facing the screening system, and a driving motor is fixed on the side wall of the box body far away from the screening system. The inside of the side box is hollow, and the outer side wall of the side box is semi-open. A main motor for driving the rotary drum to rotate is fixed on the outer side wall of the side box;

[0008] The screening system includes an inclined screening track and a support frame. The opening at the bottom of the side box accesses the top of the screening track. The support frame is fixed at the middle position of the top of the screening track, and a recycling box is movably connected to the bottom of the screening track.

[0009] Preferably, a feeding groove is symmetrically arranged at the top and bottom of the rotating drum. A pull-out partition net is installed on the feeding groove. The pull-out partition net is a structure with half fixed and half movable. A number of evenly distributed treatment bins are arranged inside the feeding groove, and the treatment bins are separated by partitions. An arc-shaped movable baffle that can rotate is arranged at the bottom of the treatment bin.

[0010] Preferably, a shaft cavity is arranged in the middle of the rotating drum. The shaft cavity extends to the outer side wall of the box body close to the side box. A main shaft is arranged inside the shaft cavity. One end of the main shaft penetrates the side wall of the box body and is connected to the output shaft of the main motor, and the other end of the main shaft is shaft-connected to the inner wall of the box body.

[0011] Preferably, the surface of the rotating drum close to the side box is a thickened surface, and the surface of the rotating drum close to the driving motor is a thin surface. An arc-shaped discharge groove is arranged below each treatment bin. The bottom end of the discharge groove extends to the end of the shaft cavity located on the thickened surface, and the bottom end of the discharge groove is connected to the main shaft.

[0012] Preferably, a gear shaft that accesses the inside of the shaft cavity is sleeved on one end of the main shaft located on the thin surface. The output shaft of the driving motor accesses the inside of the box body and is connected to a transmission gear. The transmission gear meshes with the gear shaft. The outer end of the gear shaft is shaft-connected to the inner wall of the box body, and the inner end of the gear shaft is connected to a connecting ring. The connecting ring is sleeved on the main shaft and is rotatably connected to the inner wall of the thin surface of the rotating drum. The side wall of the connecting ring is connected to the side wall of the movable baffle. There is an arc-shaped flow groove located on the inner wall of the thin surface between the inner ring of the connecting ring and the top end of the discharge groove.

[0013] Preferably, the inside of the flow groove is arc-shaped, and the end of the flow groove located on the outer side wall of the thin surface is closed. A drain groove is arranged on one side of both ends of the flow groove on the outer side wall of the thin surface. The top end of the drain groove extends into the thin surface and is connected to the flow groove, and the bottom end of the drain groove is vertical.

[0014] Preferably, the movable baffle is rotatably connected to the inner wall of the rotating drum through the connecting ring, and the length of the movable baffle is greater than that of the flow groove. A number of evenly distributed leakage holes are arranged at the top of the movable baffle, and an inner groove is arranged inside the movable baffle. The opening of the inner groove is arranged on the side wall of the movable baffle close to the thin surface, and the opening of the inner groove is adapted to the flow groove.

[0015] Preferably, a top motor is fixed at the middle position of the top of the support frame. The output shaft of the top motor penetrates the support frame and is connected to a rotating rod located below the support frame. A dial rod is connected to both ends of the rotating rod. The dial rod is placed on the screening track and there is a gap between the dial rod and the screening surface of the screening track.

[0016] Preferably, the screening surface of the screening rail is composed of several groups of sieve plates with different sieve hole sizes spliced together, and the sieve holes on the screening rail gradually increase from top to bottom. Several partition plates are arranged inside the recycling box, and the partitioned areas inside the recycling box correspond to the sieve plates on the screening surface.

[0017] A method for treating heavy metal waste residue by using a high-performance heavy metal waste residue screening and recycling device, the method comprising the following steps:

[0018] Step 1: Feeding. Seal the top of the box body, open the side door and pour the reagent or medicament for treating heavy metal waste residue into the box body. The liquid reagent poured in shall not overflow the shaft cavity and shall be 8 - 10 cm below the bottom of the shaft cavity. Drive the main shaft to rotate by the main motor to drive the entire rotating cylinder to rotate, thereby adjusting the position of the discharge chute so that the discharge chute faces the side door. Then pull out the drawable partition net and pour the heavy metal waste residue into the treatment chamber. Initially, the movable baffle is located below the treatment chamber and blocks and closes the flow channel. After the heavy metal waste residue is put in, close the drawable partition net. After the treatment chambers in both the upper and lower discharge chutes are filled with heavy metal waste residue, close the side door.

[0019] Step 2: Reaction treatment. Drive the main shaft to rotate by the main motor to drive the entire rotating cylinder to rotate, so that the heavy metal waste residue moves inside the treatment chamber and continuously contacts the treatment reagent to react as the rotating cylinder rotates. The main shaft drives the gear shaft to rotate during the rotation process, and the transmission gear engaged with the gear shaft idles. When it is necessary to transfer the heavy metal waste residue to the screening system after the reaction treatment is completed, control the main motor to drive the rotating cylinder to rotate so that one of the discharge chutes is in an upward state, and at this time the other discharge chute is in a downward state. Let it stand for a period of time. During the standing process, the liquid reagent remaining inside the treatment chamber seeps into the inner groove from the top of the movable baffle and then flows into the flow channel from the inner groove. Subsequently, the liquid reagent flows into the drain trough from the flow channel and then flows along the drain trough to the bottom of the box body.

[0020] Step 3: Discharging and reloading. When it is necessary to transfer the heavy metal waste residue to the screening system after standing, start the drive motor, drive the transmission gear to rotate by the drive motor, thereby driving the gear shaft to rotate. The main shaft does not rotate during the rotation of the gear shaft, and the connecting ring is driven to rotate during the rotation of the gear shaft, thereby driving the movable baffle to rotate and adjust its position by the connecting ring so that the bottom of the treatment chamber is opened. The heavy metal waste residue that has completed the reaction treatment slides into the discharge chute and then slides along the discharge chute onto the screening rail of the screening system. After the discharge of the material is completed, drive the gear shaft to rotate by the drive motor so that the movable baffle resets to close the treatment chamber again. Then open the side door, continue to put new heavy metal waste residue into the discharge chute, and after completion, close the drawable partition net and the side door, and control the rotating cylinder to rotate again.

[0021] Step 4: Screening. When the material enters the screening system, the top motor is started. The top motor drives the rotating rod to rotate back and forth, thereby driving the two levers to swing back and forth on the screen rail. Due to the inclined setting of the screen rail, the material can slide on the screen rail, and cooperate with the movement of the lever, so that the material can be screened more carefully, and there will be no stagnation. The material after screening by the sieve plate on the screen rail falls into the recycling box.

[0022] The beneficial effects of the present invention are as follows: heavy metal waste slag is treated by arranging a rotating drum in the form of a turntable inside the waste slag treatment system, and the discharge troughs arranged on the rotating drum are symmetrically arranged up and down, so that when one of the discharge troughs is rotated to a state with its opening facing upward and the other discharge trough is rotated to a state with its opening facing downward to drain or discharge materials, or even when heavy metal waste slag is re-added, the heavy metal waste slag inside the discharge trough in a downward state can still be treated by liquid reagents, so that the entire device can operate continuously, thereby effectively ensuring the working efficiency of the entire device and making the performance of the entire device higher.

[0023] By setting a movable block inside the waste residue treatment system, there will be no leakage during the reaction treatment of heavy metal waste residue, and drainage can be carried out when the drum is standing still. After the movable block is turned away, the material can be discharged normally, and when the drum is standing still to drain, the heavy metal waste residue inside the downward processing bin can be blocked by the pull-out partition net and will not fall.

[0024] By arranging a circulation trough and a drainage trough inside the waste residue treatment system, when the reaction treatment is completed and the heavy metal waste residue needs to be transferred to the screening system, the main motor is used to drive the rotating drum to rotate, so that one of the discharge troughs is in an upward state, and the other discharge trough is in a downward state. It is left to stand for a period of time. During the standing process, the liquid reagent remaining in the processing bin penetrates into the inner tank from the top of the movable block, and flows from the inner tank into the circulation trough. Then, the liquid reagent flows from the circulation trough into the drainage trough, and then flows into the bottom of the box along the drainage trough for recycling. On the one hand, it is more energy-saving and waste is avoided. On the other hand, the liquid reagent remaining on the surface of the heavy metal waste residue during the standing process can also be removed, and the heavy metal waste residue located in the downward discharge trough can still be soaked in the liquid reagent and reacted, so that the treatment efficiency is higher;

[0025] The interior of the flow groove is an arc-shaped structure, the top of the drainage groove extends into the interior of the thin surface and is connected to the flow groove, and the bottom of the drainage groove is a vertical structure, so that during the drainage process, the liquid reagent flowing into the flow groove can flow from the flow groove into the drainage groove. At the same time, since the bottom of the drainage groove is a vertical structure, the liquid reagent can flow along the drainage groove to the bottom of the box body. On the one hand, it can prevent the liquid reagent from being contaminated on the gear shaft to the greatest extent, and on the other hand, it can realize the recycling of the liquid reagent, thereby achieving the purpose of reducing costs;

[0026] By setting a discharge chute inside the waste residue treatment system, after the drainage is completed, the discharge chute is enabled after the movable gear is rotated and shifted. The arc-shaped discharge chute allows the heavy metal waste residue that has completed the reaction treatment to slide more smoothly into the discharge chute and slide along the discharge chute onto the screen rail of the screening system. The setting of the discharge chute makes it more convenient and quicker to transfer the material from the waste residue treatment system to the screening system without the need to take it in separately.

[0027] By setting a lever on the screen rail of the screening system, when the material slides on the screen rail for screening, the inclined screen rail cooperates with the movement of the lever, so that the material can be screened more finely without stagnation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the drum of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the rotary drum after the pull-out screen is removed from the rotary drum of the present invention;

[0032] Figure 4 For the present invention Figure 3 A schematic diagram of the structure after the rotary drum in the embodiment is further disassembled into a processing chamber;

[0033] Figure 5 It is a schematic diagram of the side structure of the rotary drum of the present invention;

[0034] Figure 6 For the present invention Figure 5 A schematic diagram of a structure in which the drum circulation slot and the drain slot are not closed;

[0035] Figure 7 It is a schematic structural diagram of the gear shaft of the present invention;

[0036] Figure 8 For the present invention Figure 5Enlarged view of the details of area A therein;

[0037] Figure 9 Structural schematic diagram of the support frame of the present invention;

[0038] Figure 10 Structural schematic diagram of the movable baffle of the present invention;

[0039] Figure 11 Side view of the movable baffle of the present invention;

[0040] In the figure: 1, fixed frame; 2, box body; 3, side door; 4, driving motor; 5, rotating drum; 6, side box; 7, main motor; 8, support; 9, screening rail; 10, support frame; 11, feeding trough; 12, pull-out partition net; 13, shaft cavity; 14, main shaft; 15, discharge trough; 16, treatment chamber; 17, movable baffle; 18, circulation trough; 19, water discharge trough; 20, gear shaft; 21, top motor; 22, rotating rod; 23, dial rod; 24, inner groove; 25, recycling box; 26, connecting ring. Detailed implementation manners

[0041] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. 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.

[0042] Please refer to Figure 1-11 As shown, a high-performance heavy metal waste residue screening and recycling device includes a waste residue treatment system and a screening system. The waste residue treatment system is arranged on the top of the fixed frame 1, the screening system is fixed on the top of the support 8, the support 8 is located on one side of the fixed frame 1, and the screening system is located on the bottom side wall of the waste residue treatment system;

[0043] The waste residue treatment system includes a box body 2 and a rotating drum 5. The rotating drum 5 is rotatably installed inside the box body 2. The top of the box body 2 is provided with a detachable sealing cover, and a side door 3 that can be opened and closed is provided on the side wall of the box body 2. A side box 6 is fixed on the side wall of the box body 2 facing the screening system, and a driving motor 4 is fixed on the side wall of the box body 2 away from the screening system. The inside of the side box 6 is hollow, and the outer side wall of the side box 6 is semi-open. A main motor 7 for driving the rotating drum 5 to rotate is fixed on the outer side wall of the side box 6. The bottom of the side box 6 extends to the screening rail 9. The setting of the side box 6 ensures that there is no leakage when the material is transferred into the screening system;

[0044] The screening system includes an inclined screening rail 9 and a support frame 10. The opening at the bottom of the side box 6 accesses the top end of the screening rail 9. The support frame 10 is fixed at the middle position on the top of the screening rail 9. A recycling box 25 is movably connected to the bottom of the screening rail 9.

[0045] A discharge chute 11 is symmetrically arranged at the top and bottom of the rotary drum 5. A pull-out partition net 12 is installed on the discharge chute 11. The pull-out partition net 12 has a structure where one side is fixed and the other side is movable. The specific structure and principle of the pull-out partition net 12 are the same as those of the common pull-out glass window at home, except that the pull-out partition net 12 has one side fixed and the other side movable, and is equipped with buckles and slots for locking. The discharge chute 11 is provided with a sliding groove for the pull-out and movement of the pull-out partition net 12. Inside the discharge chute 11, a number of uniformly distributed treatment chambers 16 are arranged, and the treatment chambers 16 are separated by partitions. A rotatable and arc-shaped movable baffle 17 is arranged at the bottom of the treatment chamber 16.

[0046] A shaft cavity 13 is arranged in the middle of the rotary drum 5. The shaft cavity 13 extends to the outer wall of the box body 2 near the side box 6, so that the material can be normally discharged into the screening system. A main shaft 14 is arranged inside the shaft cavity 13. One end of the main shaft 14 penetrates the side wall of the box body 2 and is connected to the output shaft of the main motor 7, and the other end of the main shaft 14 is shaft-connected to the inner wall of the box body 2, so that the entire rotary drum 5 can rotate normally driven by the main shaft 14.

[0047] The surface of the rotary drum 5 close to the side box 6 is a thickened surface, and the surface of the rotary drum 5 close to the drive motor 4 is a thin surface. An arc-shaped discharge chute 15 is arranged below each treatment chamber 16. The bottom end of the discharge chute 15 extends to the end of the shaft cavity 13 located on the thickened surface, and the bottom end of the discharge chute 15 is connected to the main shaft 14. The arc-shaped discharge chute 15 enables the material to slide and discharge inside the discharge chute 15, thus avoiding blockage.

[0048] A gear shaft 20 inserted into the inner part of the access shaft cavity 13 is sleeved on one end of the spindle 14 located on the thin surface. The output shaft of the driving motor 4 is inserted into the box body 2 and connected with a transmission gear. The transmission gear meshes with the gear shaft 20. The outer end of the gear shaft 20 is axially connected to the inner wall of the box body 2, and an inner end of the gear shaft 20 is connected with a connecting ring 26. The connecting ring 26 is sleeved on the spindle 14 and is rotatably connected with the inner wall of the thin surface of the rotary drum 5. The side wall of the connecting ring 26 is connected with the side wall of the movable baffle 17. There is a flow channel 18 which is arc-shaped and located on the inner wall of the thin surface between the inner ring of the connecting ring 26 and the top end of the discharge groove 15. The setting of the flow channel 18 enables, when it is necessary to transfer the heavy metal waste residue to the screening system after the reaction treatment is completed, the main motor 7 to drive the rotary drum 5 to rotate, so that one of the discharge grooves 11 is in an upward state, and at this time the other discharge groove 11 is in a downward state. After standing for a period of time, during the standing process, the liquid reagent remaining inside the treatment chamber 16 seeps into the inner groove 24 from the top of the movable baffle 17, and flows from the inner groove 24 into the flow channel 18. Subsequently, the liquid reagent flows from the flow channel 18 into the drain channel 19, and thus flows along the drain channel 19 into the bottom of the box body 2 for recycling. On the one hand, it is more energy-saving and avoids waste. On the other hand, the liquid reagent remaining on the surface of the heavy metal waste residue can also be removed during the standing process. The heavy metal waste residue located inside the downward discharge groove 11 can still be soaked by the liquid reagent and undergo reaction treatment, making the treatment efficiency higher.

[0049] The inside of the flow channel 18 is arc-shaped, and the end of the flow channel 18 located on the outer side wall of the thin surface is closed. A drain channel 19 is provided on one side of each end of the flow channel 18 on the outer side wall of the thin surface. The top end of the drain channel 19 extends into the inside of the thin surface and is communicated with the flow channel 18, and the bottom end of the drain channel 19 is vertical. During the water draining process, the liquid reagent flowing into the flow channel 18 can flow from the flow channel 18 into the drain channel 19. Since the bottom end of the drain channel 19 is vertical, the liquid reagent can flow along the drain channel 19 into the bottom of the box body 2, and the liquid reagent can be avoided from contaminating the gear shaft 20 to the greatest extent.

[0050] The movable baffle 17 is rotatably connected with the inner wall of the rotary drum 5 through the connecting ring 26. The length of the movable baffle 17 is greater than that of the flow channel 18. A number of uniformly distributed leakage holes are provided at the top of the movable baffle 17, and an inner groove 24 is provided inside the movable baffle 17. The inner groove 24 is open on the side wall of the movable baffle 17 close to the thin surface, and the opening of the inner groove 24 is adapted to the flow channel 18. The setting of the movable baffle 17 enables the heavy metal waste residue not to leak during the reaction treatment process, and can drain water during the standing process of the rotary drum 5. After the movable baffle 17 rotates away, the materials can be discharged normally. When the rotary drum 5 stands and drains water, the heavy metal waste residue inside the downward treatment chamber 16 can be blocked by the pull-out partition net 12 and thus will not fall off.

[0051] A top motor 21 is fixed in the middle position of the top of the support frame 10. The output shaft of the top motor 21 passes through the support frame 10 and is connected to a rotating rod 22 located below the support frame 10. Both ends of the rotating rod 22 are connected to a shifting rod 23. The shifting rod 23 is placed on the screen rail 9 and a gap is left between the screen surface of the screen rail 9. When the material slides on the screen rail 9 for screening, the inclined screen rail 9 cooperates with the movement of the shifting rod 23, so that the material can be screened more carefully without stagnation.

[0052] The screen surface of the screen rail 9 is composed of several groups of screen plates with different screen hole sizes, and the screen holes on the screen rail 9 gradually increase from top to bottom. Several partition plates are arranged inside the recovery box 25, and the separated areas inside the recovery box 25 correspond to the screen plates on the screen surface, so that the materials screened by the screen plates on the screen rail 9 can also fall into the recovery box 25 in layers.

[0053] A method for treating heavy metal waste residues using a high-performance heavy metal waste residue screening and recycling device, the method comprising the following steps:

[0054] Step 1: feeding, close the top of the box body 2, open the side door 3 and pour the reagent or medicine for treating heavy metal waste slag into the box body 2. The liquid reagent should not overflow the shaft cavity 13 and should be 8-10cm lower than the bottom of the shaft cavity 13. Use the main motor 7 to drive the main shaft 14 to rotate to drive the entire rotating drum 5 to rotate, so as to adjust the position of the discharge trough 11 so that the discharge trough 11 faces the side door 3, and then pull out the pull-out partition 12 to pour the heavy metal waste slag into the processing bin 16. Initially, the movable block 17 is below the processing bin 16 and blocks and closes the flow slot 18. After the heavy metal waste slag is added, close the pull-out partition 12, and close the side door 3 after the processing bins 16 in the upper and lower discharge troughs 11 have completed the addition of heavy metal waste slag.

[0055] Step 2: Reaction treatment, using the main motor 7 to drive the main shaft 14 to rotate to drive the entire drum 5 to rotate, so that the heavy metal waste slag moves inside the treatment bin 16, and as the drum 5 rotates, it constantly contacts the treatment reagent to react. The main shaft 14 rotates together with the gear shaft 20 during the rotation process, and the transmission gear meshing with the gear shaft 20 idles. When the reaction treatment is completed and the heavy metal waste slag needs to be transferred to the screening system, the main motor 7 is controlled to drive the drum 5 to rotate, so that one of the discharge troughs 11 is in an upward state, and the other discharge trough 11 is in a downward state. Let it stand for a period of time. During the standing process, the liquid reagent remaining in the treatment bin 16 penetrates into the inner tank 24 from the top of the movable stop 17, and flows from the inner tank 24 into the circulation tank 18. Then the liquid reagent flows from the circulation tank 18 into the drainage tank 19, and then flows into the bottom of the box body 2 along the drainage tank 19;

[0056] Step 3: Discharge and reload. When the heavy metal waste slag needs to be transferred to the screening system after the static state is completed, the drive motor 4 is started, and the drive motor 4 is used to drive the transmission gear to rotate, thereby driving the gear shaft 20 to rotate. The main shaft 14 does not rotate during the rotation of the gear shaft 20, and the gear shaft 20 drives the connecting ring 26 to rotate during the rotation, so that the connecting ring 26 drives the movable stop 17 to rotate and adjust the position, so that the bottom of the processing bin 16 is opened, and the heavy metal waste slag that has completed the reaction treatment slides into the discharge chute 15, and slides along the discharge chute 15 into the screen rail 9 of the screening system. When the material is discharged, the drive motor 4 is used to drive the gear shaft 20 to rotate, so that the movable stop 17 is reset, so as to re-close the processing bin 16, and then open the side door 3, and continue to put new heavy metal waste slag into the discharge chute 11. After completion, close the pull-out partition 12 and the side door 3, and re-control the drum 5 to continue to rotate;

[0057] Step 4: Screening. When the material enters the screening system, the top motor 21 is started. The top motor 21 drives the rotating rod 22 to rotate back and forth, thereby driving the two levers 23 to swing back and forth on the screen rail 9. Since the screen rail 9 is tilted, the material can slide on the screen rail 9, and cooperate with the movement of the lever 23, so that the material can be screened more carefully, and there will be no stagnation. The material after being screened by the sieve plate on the screen rail 9 falls into the recovery box 25.

[0058] When the present invention is used, firstly, the entire device is connected to an external power supply and an external PLC controller (model: CPM1A) is used to control the operation of the entire device. Before use, the top of the box body 2 is closed, and the side door 3 is opened to pour the reagent or medicine for treating heavy metal waste slag into the box body 2. The liquid reagent cannot overflow the shaft cavity 13. The main motor 7 is used to drive the main shaft 14 to rotate to drive the entire rotating drum 5 to rotate, thereby adjusting the position of the discharge trough 11 so that the discharge trough 11 faces the side door 3, and then the pull-out partition 12 is pulled open, and the heavy metal waste slag is poured into the processing bin 16. Initially, the movable block 17 is below the processing bin 16 and blocks and closes the flow slot 18. After the heavy metal waste slag is put in, the pull-out partition 12 is closed, and the side door 3 is closed after the processing bins 16 in the upper and lower discharge troughs 11 have completed the putting in of heavy metal waste slag.

[0059] Subsequently, the main motor 7 is used to drive the rotation of the main shaft 14 to drive the rotation of the entire rotary drum 5, so that the heavy metal waste residue moves inside the treatment chamber 16, and continuously contacts with the treatment reagent during the rotation of the rotary drum 5 to carry out reactions. During the rotation of the main shaft 14, the gear shaft 20 rotates together, and the transmission gear meshing with the gear shaft 20 idles. When it is necessary to transfer the heavy metal waste residue to the screening system after the reaction treatment is completed, the PLC controller is used to control the main motor 7 to drive the rotation of the rotary drum 5, so that one of the discharge troughs 11 is in an upward state, and at this time the other discharge trough 11 is in a downward state. After standing for a period of time, during the standing process, the liquid reagent remaining inside the treatment chamber 16 seeps into the inner trough 24 from the top of the movable baffle 17, and flows from the inner trough 24 into the flow trough 18. Subsequently, the liquid reagent flows from the flow trough 18 into the drain trough 19, and then flows along the drain trough 19 into the bottom of the box body 2 for recycling. On the one hand, it is more energy-saving and avoids waste. On the other hand, the liquid reagent remaining on the surface of the heavy metal waste residue can also be removed during the standing process. The heavy metal waste residue located inside the downward discharge trough 11 can still be soaked by the liquid reagent and undergo reaction treatment, making the treatment efficiency higher. When it is necessary to transfer the heavy metal waste residue to the screening system after the reaction treatment is completed, the PLC controller is used to control the main motor 7 to drive the rotation of the rotary drum 5, so that one of the discharge troughs 11 is in an upward state, and at this time the other discharge trough 11 is in a downward state. After standing for a period of time, during the standing process, the liquid reagent remaining inside the treatment chamber 16 seeps into the inner trough 24 from the top of the movable baffle 17, and flows from the inner trough 24 into the flow trough 18. Subsequently, the liquid reagent flows from the flow trough 18 into the drain trough 19, and then flows along the drain trough 19 into the bottom of the box body 2 for recycling. On the one hand, it is more energy-saving and avoids waste. On the other hand, the liquid reagent remaining on the surface of the heavy metal waste residue can also be removed during the standing process. The heavy metal waste residue located inside the downward discharge trough 11 can still be soaked by the liquid reagent and undergo reaction treatment, making the treatment efficiency higher;

[0060] After the standing still is completed, when the heavy metal waste slag needs to be transferred to the screening system, the drive motor 4 is started, and the drive motor 4 is used to drive the transmission gear to rotate, thereby driving the gear shaft 20 to rotate. During the rotation of the gear shaft 20, the main shaft 14 does not rotate, and the gear shaft 20 drives the connecting ring 26 to rotate during the rotation, so that the connecting ring 26 drives the movable stop 17 to rotate and adjust the position, so that the bottom of the processing bin 16 is opened, and the heavy metal waste slag that has completed the reaction treatment slides into the discharge trough 15, and slides along the discharge trough 15 into the screen rail 9 of the screening system. When the material is discharged, the drive motor 4 is used to drive the gear shaft 20 to rotate, so that the movable stop 17 is reset. In this way, the processing bin 16 is closed again, and then the side door 3 is opened, and new heavy metal waste slag is continuously put into the discharge trough 11. After completion, the pull-out screen 12 and the side door 3 are closed, and the drum 5 is controlled to continue to rotate. On the one hand, this method enables the waste slag treatment system to operate continuously and perform the reaction treatment of the waste slag whether the heavy metal waste slag is being drained or discharged into the screening system. On the other hand, even if new heavy metal waste slag is re-added into the waste slag treatment system, the processing bin 16 is still in the state of processing the heavy metal waste slag, thereby ensuring the working efficiency of the entire device. At the same time, before the material is discharged into the screening system, it is not necessary to take it out separately for draining, which is more convenient to use.

[0061] When the material enters the screening system, the top motor 21 is started, and the top motor 21 drives the rotating rod 22 to rotate back and forth, thereby driving the two levers 23 to swing back and forth on the screen rail 9. Since the screen rail 9 is set at an angle, the material can slide on the screen rail 9, and cooperate with the movement of the lever 23, so that the material can be screened more carefully, and there will be no stagnation. The material after being screened by the sieve plate on the screen rail 9 falls into the recycling box 25. When further screening is required, the material on the recycling box 25 is poured back onto the screen rail 9 and replaced with a new recycling box 25. Finally, the recycling box 25 is taken out and the material is taken away to complete the recycling.

[0062] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-performance device for screening, recycling and utilization of heavy metal waste residue, comprising a waste residue treatment system and a screening system. It is characterized in that: The waste residue treatment system is arranged on the top of the fixed frame, and the screening system is fixed on the top of the support. The support is located on one side of the fixed frame, and the screening system is located on the bottom side wall of the waste residue treatment system. The waste residue treatment system includes a box body and a rotary drum. The rotary drum is rotatably installed inside the box body. A side box is fixed on the side wall of the box body facing the screening system. And a driving motor is fixed on the side wall of the box body far away from the screening system. The inside of the side box is hollow, and the outer side wall of the side box is semi-open. A main motor for driving the rotary drum to rotate is fixed on the outer side wall of the side box. Feeding grooves are symmetrically arranged at the top and bottom of the rotary drum. A pull-out partition net is installed on the feeding groove. The pull-out partition net is a structure with half fixed and half movable. A number of evenly distributed treatment bins are arranged inside the feeding groove, and the treatment bins are separated by partitions. An arc-shaped movable baffle that can rotate is arranged at the bottom of the treatment bin. A shaft cavity is arranged in the middle of the rotary drum, and the shaft cavity extends to the outer side wall of the box body close to the side box. A main shaft is arranged inside the shaft cavity. One end of the main shaft penetrates the side wall of the box body and is connected to the output shaft of the main motor, and the other end of the main shaft is shaft-connected to the inner wall of the box body. The surface of the rotary drum close to the side box is a thickened surface, and the surface of the rotary drum close to the driving motor is a thin surface. An arc-shaped discharge groove is arranged below each treatment bin. The bottom end of the discharge groove extends to the end of the shaft cavity located on the thickened surface, and the bottom end of the discharge groove is connected to the main shaft. A gear shaft connected to the inside of the shaft cavity is sleeved on one end of the main shaft located on the thin surface. The output shaft of the driving motor extends into the box body and is connected to a transmission gear. The transmission gear meshes with the gear shaft. The outer end of the gear shaft is shaft-connected to the inner wall of the box body, and the inner end of the gear shaft is connected to a connecting ring. The connecting ring is sleeved on the main shaft and is rotatably connected to the inner wall of the thin surface of the rotary drum. The side wall of the connecting ring is connected to the side wall of the movable baffle. There is an arc-shaped flow channel located on the inner wall of the thin surface between the inner ring of the connecting ring and the top end of the discharge groove. The inside of the flow channel is arc-shaped, and the end of the flow channel located on the outer side wall of the thin surface is closed. A drain groove is arranged on one side of both ends of the flow channel on the outer side wall of the thin surface. The top end of the drain groove extends into the thin surface and is connected to the flow channel, and the bottom end of the drain groove is vertical. The movable baffle is rotatably connected to the inner wall of the rotary drum through the connecting ring, and the length of the movable baffle is greater than that of the flow channel. A number of evenly distributed leakage holes are arranged at the top of the movable baffle, and an inner groove is arranged inside the movable baffle. The opening of the inner groove is arranged on the side wall of the movable baffle close to the thin surface, and the opening of the inner groove is adapted to the flow channel.

2. A high-performance device for screening, recycling and utilization of heavy metal waste residue according to claim 1, It is characterized in that: The screening system includes a slantingly arranged screening rail and a support frame. The opening at the bottom of the side box accesses the top end of the screening rail. The support frame is fixed at the middle position of the top of the screening rail. A recycling box is movably connected to the bottom of the screening rail. A top motor is fixed at the middle position of the top of the support frame. The output shaft of the top motor penetrates through the support frame and is connected to a rotating rod located below the support frame. Both ends of the rotating rod are connected to a dial rod. The dial rod is placed on the screening rail and there is a gap between the dial rod and the screening surface of the screening rail.

3. The high-performance heavy metal waste residue screening and recycling device according to claim 2, characterized in that the screening surface of the screening rail is composed of several groups of sieve plates with different sieve hole sizes spliced together, and the sieve holes on the screening rail gradually increase from top to bottom. Several partition plates are arranged inside the recycling box, and the partitioned areas inside the recycling box correspond to the sieve plates on the screening surface.

4. A method for treating heavy metal waste residue by using the high-performance heavy metal waste residue screening and recycling device according to claim 1, characterized in that the method includes the following steps: Step 1: Feeding. Close the top of the box body. Open the side door and pour the reagent or medicament for treating heavy metal waste residue into the box body. The liquid reagent poured in should not overflow the shaft cavity and should be 8 - 10 cm below the bottom of the shaft cavity. Drive the main shaft to rotate by using the main motor to drive the entire rotating cylinder to rotate, so as to adjust the position of the discharge chute to make the discharge chute face the side door. Then pull out the pull-out partition net and pour the heavy metal waste residue into the treatment chamber. Initially, the movable baffle is below the treatment chamber and blocks the flow-through groove. After the heavy metal waste residue is put in, close the pull-out partition net. After the treatment chambers in both the upper and lower discharge chutes are filled with heavy metal waste residue, close the side door. Step 2: Reaction treatment. Drive the main shaft to rotate by using the main motor to drive the entire rotating cylinder to rotate, so that the heavy metal waste residue moves inside the treatment chamber and continuously contacts the treatment reagent to react as the rotating cylinder rotates. The main shaft drives the gear shaft to rotate during rotation, and the transmission gear meshing with the gear shaft idles. When it is necessary to transfer the heavy metal waste residue to the screening system after the reaction treatment is completed, control the main motor to drive the rotating cylinder to rotate so that one of the discharge chutes is in the upward state and the other discharge chute is in the downward state. Let it stand for a period of time. During the standing process, the liquid reagent remaining inside the treatment chamber seeps into the inner groove from the top of the movable baffle and then flows into the flow-through groove from the inner groove. Subsequently, the liquid reagent flows into the drain chute from the flow-through groove and then flows into the bottom of the box body along the drain chute. Step 3: Discharge and re-load. After the material is left to stand, when the heavy metal waste slag needs to be transferred to the screening system, start the drive motor, and use the drive motor to drive the transmission gear to rotate, thereby driving the gear shaft to rotate. The main shaft does not rotate during the rotation of the gear shaft, and the gear shaft drives the connecting ring to rotate during the rotation, so that the connecting ring drives the movable gear to rotate and adjust the position, so that the bottom of the processing bin is opened, and the heavy metal waste slag that has completed the reaction treatment slides into the discharge trough, and slides along the discharge trough into the screen rail of the screening system. When the material is discharged, the drive motor is used to drive the gear shaft to rotate, so that the movable gear is reset to re-close the processing bin, and then open the side door, and continue to put new heavy metal waste slag into the discharge trough. After completion, close the pull-out partition and the side door, and re-control the drum to continue rotating; Step 4: Screening. When the material enters the screening system, the top motor is started. The top motor drives the rotating rod to rotate back and forth, thereby driving the two levers to swing back and forth on the screen rail. Due to the inclined setting of the screen rail, the material can slide on the screen rail, and cooperate with the movement of the lever, so that the material can be screened more carefully, and there will be no stagnation. The material after screening by the sieve plate on the screen rail falls into the recycling box.

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