Arsenic-containing hazardous waste residue reduction treatment device

Abstract

The utility model relates to a kind of arsenic-containing hazardous waste slag reduction processing device, including bunker, its bottom center vertical and rotationally equipped with shaft sleeve, shaft sleeve inside coaxially and rotationally equipped with shaft, the rotation direction of shaft and shaft sleeve is opposite and its top end protrudes shaft sleeve and is fixedly connected with taper block, the lower part circumferential side of taper block is fixed with several downwardly inclined chute, the top of bunker corresponding to chute is fixed with Y-shaped feed pipe, feed pipe upper portion both ends are equipped with feed valve, the circumferential side between shaft and shaft sleeve is fixed with several inverted L-shaped stirring rod, the inside of shaft sleeve circumferential side and stirring rod vertical portion is fixed with square stirring frame and the stirring frame of two is spaced distribution, stirring frame inside is fixed with mesh stirring piece, the inner wall of bunker left and right sides is rotationally equipped with turntable, the circumferential side of turntable is fixed with several L-shaped support rod, support rod tail end is fixed with turning stirring shovel.The utility model can realize uniform distribution of material and efficient high-quality stirring mixing, and the mixing uniformity is higher.

Description

Technical Field

[0001] This utility model belongs to the field of arsenic-containing hazardous waste residue treatment technology, specifically relating to an arsenic-containing hazardous waste residue reduction treatment device. Background Technology

[0002] Currently, the main process for reducing the volume of arsenic-containing hazardous waste residue involves first filtering the residue using a plate and frame filter press, then discharging the residue through a hopper. The residue is then conveyed to a storage silo via a double-screw conveyor. A conditioning agent is added to the silo to ensure uniform mixing with the arsenic sulfide residue. This mixture is then conveyed again via a double-screw conveyor to a dewatering unit. The dewatering unit heats the residue in a negative pressure micro-vacuum environment using hydrothermal methods, causing the moisture in the residue to evaporate as hot steam, which is then condensed in a condenser. After treatment, the steam meets discharge standards. The dewatered residue has a significantly reduced moisture content, achieving a high volume reduction effect. The dried residue is then conveyed again via a double-screw conveyor to an automatic packaging and compression unit for compression and bagging. The conditioning agent's main function is to disrupt the system equilibrium of the residue, converting the previously difficult-to-remove bound water into more easily separated free water, thus facilitating the subsequent dewatering steps and achieving the volume reduction goal. Therefore, the uniformity of mixing between the conditioner and the slag is crucial. However, the conventional mixers used in existing silos have limited mixing effect when mixing slag and conditioner. Furthermore, due to the fixed feed inlet, the material tends to accumulate in one place during feeding, increasing the difficulty of mixing. This results in low overall mixing efficiency and quality, affecting the uniformity of mixing and hindering subsequent dewatering treatment. This issue needs to be addressed. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a device for reducing the volume of arsenic-containing hazardous waste residue, which can achieve uniform material distribution and efficient and high-quality mixing, so as to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a device for reducing the volume of arsenic-containing hazardous waste residue, comprising a silo, a vertically rotatable bushing at the bottom center of the silo, a coaxially rotatable shaft inside the bushing, the shaft rotating in the opposite direction to the bushing and its top extending out of the bushing and fixedly connected to a conical block, a plurality of downwardly inclined chutes fixedly provided on the lower periphery of the conical block, a Y-shaped feed pipe fixedly provided on the top of the silo corresponding to the chutes, and feed valves provided at both ends of the upper part of the feed pipe. A feed hopper is fixedly connected. Several inverted L-shaped stirring rods are fixedly installed on the circumference of the rotating shaft between the cone block and the bushing. Square stirring frames are fixedly installed on the outer circumference of the bushing and on the inner side of the vertical part of the stirring rods, and the stirring frames are distributed vertically at intervals. A mesh stirring component is fixedly installed on the inner side of each stirring frame. Turntables are rotatably installed on the inner walls of the left and right sides of the hopper. Several L-shaped support rods are fixedly installed on the circumference of the turntables. A stirring shovel is fixedly installed at the tail end of the support rods. A discharge pipe with a discharge valve is connected to the bottom of one side of the hopper.

[0005] Preferably, the bottom end of the bushing extends out of the hopper and is fixedly sleeved with a first driven bevel gear, the bottom end of the rotating shaft extends out of the bushing and is fixedly sleeved with a second driven bevel gear, a first motor is fixedly mounted on the outer bottom of the hopper, a driving bevel gear is fixedly sleeved on the output shaft of the first motor, and the first and second driven bevel gears are positioned opposite each other on the upper and lower sides of the driving bevel gear and are both perpendicularly meshed with the driving bevel gear.

[0006] Preferably, a second motor is provided on the outer fixed frame of the hopper corresponding to the turntable, and the output shaft of the second motor extends into the hopper and is coaxially and fixedly connected to the corresponding turntable.

[0007] Preferably, the mesh stirring element is formed by the intersection of several vertical bars and several horizontal bars.

[0008] Preferably, both the upper surfaces of the cone block and the feed trough are provided with a wear-resistant ceramic coating.

[0009] The beneficial effects of this invention are as follows: In the reduction treatment of arsenic-containing hazardous waste residue, when mixing the residue with the conditioning agent, one feed valve can be opened first, and the residue processed in the previous process can be transported to the feed hopper through conventional double-screw conveying equipment. The residue is then fed into the silo via the feed hopper. During this process, the residue can flow along the corresponding pipe of the feed pipe and fall onto the cone block. Then, under the dispersing action of the cone block's surface, it is dispersed into various chutes, and finally, under the guiding action of each chute, it falls evenly into the silo, thus achieving uniform distribution of the residue during feeding. Similarly, after the residue feeding is completed, another feed valve can be opened, and the corresponding conditioning agent can be fed into the silo through another feed hopper, achieving uniform distribution of the conditioning agent during feeding. In this way, uniform distribution of the residue and conditioning agent during feeding can be achieved, avoiding excessive concentration of materials during feeding, effectively reducing the difficulty of subsequent mixing, and ensuring the overall mixing efficiency and quality. After feeding, the mixing process can begin. Specifically, the bushing and rotating shaft drive two sets of mixing frames, spaced vertically, to rotate in opposite directions. Utilizing the multiple mixing frames in each set and the mesh mixing elements within each frame, efficient and high-quality mixing of the materials is achieved. The mixing force is sufficient, and the opposite rotation of the two sets of mixing frames creates interlayer convection, further enhancing the mixing effect and resulting in higher overall mixing efficiency and quality. Simultaneously, the rotation of the turntable drives multiple support rods and tumbling shovels to rotate perpendicular to the bushing and rotating shaft, continuously tumbling the bottom layer of material to the top, further promoting the mixing of the upper and lower layers and improving overall mixing efficiency and quality. Compared to conventional single-set, unidirectional mixers, this method better ensures the uniformity of the mixture between the slag and the conditioning agent, thus facilitating subsequent dewatering. After mixing, the discharge valve is opened, and the slag is discharged through the discharge pipe to the subsequent conveying equipment for dewatering. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0011] Figure 2 This is a top view of the structure of this utility model;

[0012] Figure 3 This is a schematic diagram of the main structure of the bushing and rotating shaft of this utility model;

[0013] Figure 4 This is a top view schematic diagram of the cone block and chute of this utility model.

[0014] The following numbers are labeled in the diagram: 1 is the hopper, 2 is the bushing, 3 is the rotating shaft, 4 is the cone block, 5 is the chute, 6 is the feed pipe, 7 is the feed valve, 8 is the feed hopper, 9 is the stirring rod, 10 is the stirring frame, 11 is the mesh stirring component, 12 is the turntable, 13 is the support rod, 14 is the stirring shovel, 15 is the discharge valve, 16 is the discharge pipe, 17 is the first driven bevel gear, 18 is the second driven bevel gear, 19 is the first motor, 20 is the driving bevel gear, 21 is the second motor, 22 is the vertical rod, and 23 is the horizontal rod. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] like Figures 1 to 4 As shown, an arsenic-containing hazardous waste reduction treatment device includes a silo 1. A vertically rotatable bushing 2 is mounted at the bottom center of the silo 1. A rotating shaft 3 is coaxially mounted and rotatable inside the bushing 2. The rotating shaft 3 rotates in the opposite direction to the bushing 2, and its top extends out of the bushing 2 and is fixedly connected to a cone block 4. Several downwardly inclined chutes 5 are fixedly mounted on the lower periphery of the cone block 4. A Y-shaped feed pipe 6 is fixedly mounted on the top of the silo 1 corresponding to the chutes 5. Feed valves 7 are provided on both ends of the upper part of the feed pipe 6 and feed hoppers 8 are fixedly connected to them. Several inverted L-shaped stirring rods 9 are fixedly mounted on the periphery of the rotating shaft 3 between the cone block 4 and the bushing 2. Square stirring frames 10 are fixedly mounted on the outer periphery of the bushing 2 and on the inner side of the vertical part of the stirring rods 9, and the stirring frames 10 are distributed vertically at intervals. A mesh stirring element 11 is fixedly mounted on the inner side of each stirring frame 10. Turntables 12 are rotatably mounted on the inner walls of both sides of the silo 1. Several L-shaped support rods 13 are fixed on the periphery of the turntables 12, and a stirring shovel 14 is fixed at the tail end of the support rods 13. A discharge pipe 16 with a discharge valve 15 is connected to the bottom of one side of the silo 1. After feeding, the mixing operation can be carried out. Specifically, the bushing 2 and the rotating shaft 3 can drive two sets of stirring frames 10, which are distributed vertically and vertically, to rotate in opposite directions. By using the multiple stirring frames 10 in each set and the mesh stirring element 11 in each stirring frame 10, the material can be mixed efficiently and with high quality. The mixing force is sufficient, and the opposite rotation of the two sets of stirring frames 10 can form interlayer convection, which can further enhance the mixing effect and make the overall mixing efficiency and quality higher. Simultaneously, the rotation of the turntable 12 drives multiple support rods 13 and the tumbling shovel 14 to rotate perpendicularly to the bushing 2 and the rotating shaft 3, continuously tumbling the bottom material to the top layer, further promoting the mixing of the upper and lower layers, thereby improving the overall mixing efficiency and quality. Compared with existing conventional single-unit unidirectional agitators, it better ensures the uniformity of mixing between the slag and the conditioning agent, thus being more conducive to subsequent dewatering treatment. After mixing is completed, the discharge valve 15 is opened, and the slag is discharged through the discharge pipe 16 to the subsequent conveying equipment for dewatering treatment.

[0017] In the reduction treatment of arsenic-containing hazardous waste residue, when mixing the residue with the conditioning agent, a feed valve 7 can be opened first. The residue processed in the previous step is then conveyed to the feed hopper 8 via conventional double-screw conveying equipment. From there, the residue is fed into the silo 1. During this process, the residue flows along the corresponding pipes of the feed pipe 6 and falls onto the cone block 4. Then, under the dispersing action of the cone surface of the cone block 4, it is dispersed into various chutes 5. Finally, under the guiding action of the chutes 5, it falls evenly into the silo 1, thus achieving uniform distribution of the residue during feeding. Similarly, after the residue feeding is completed, another feed valve 7 can be opened, and the corresponding conditioning agent is fed into the silo 1 via another feed hopper 8, achieving uniform distribution of the conditioning agent during feeding. This ensures uniform distribution of both the residue and the conditioning agent during feeding, preventing excessive concentration of materials during feeding, effectively reducing the difficulty of subsequent mixing, and guaranteeing the overall mixing efficiency and quality.

[0018] In this embodiment, the bottom end of the bushing 2 extends out of the hopper 1 and is fixedly fitted with a first driven bevel gear 17. The bottom end of the rotating shaft 3 extends out of the bushing 2 and is fixedly fitted with a second driven bevel gear 18. A first motor 19 is fixedly mounted on the outer bottom of the hopper 1. A driving bevel gear 20 is fixedly fitted on the output shaft of the first motor 19. The first driven bevel gear 17 and the second driven bevel gear 18 are positioned opposite each other on the upper and lower sides of the driving bevel gear 20 and are both perpendicularly meshed with the driving bevel gear 20. This allows the first motor 19 to provide power during mixing operations, and through bevel gear transmission, drive the bushing 2 and the rotating shaft 3 to rotate in opposite directions, thereby cooperating to achieve the corresponding mixing operation.

[0019] In this embodiment, a second motor 21 is fixedly mounted on the outer side of the hopper 1 corresponding to the turntable 12. The output shaft of the second motor 21 extends into the hopper 1 and is coaxially fixedly connected to the corresponding turntable 12. This allows the second motor 21 to provide power during mixing operations, driving the turntable 12 and its support rod 13 and tumbling shovel 14 to rotate, thereby cooperating to achieve the tumbling operation.

[0020] In this embodiment, the mesh agitator 11 is formed by the intersection of several vertical bars 22 and several horizontal bars 23 to ensure the agitation force and material flowability.

[0021] In this embodiment, the upper surfaces of the cone block 4 and the feed trough 5 are provided with a wear-resistant ceramic coating (not shown in the figure) to improve the wear resistance and smoothness of the surfaces of the cone block 4 and the feed trough 5, so that the material can be distributed smoothly and evenly during feeding and to ensure the service life of the cone block 4 and the feed trough 5.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for reducing the volume of arsenic-containing hazardous waste residue, characterized in that, The hopper includes a hopper with a vertically rotatable bushing at its bottom center. A rotating shaft, coaxial with and rotatable within the bushing, extends out of the bushing and is fixedly connected to a conical block. Several downwardly inclined chutes are fixedly mounted on the lower periphery of the conical block. A Y-shaped feed pipe is fixedly mounted on the top of the hopper corresponding to the chutes. Feed valves are fixedly mounted on both ends of the upper part of the feed pipe, and feed hoppers are fixedly connected to them. Several inverted L-shaped stirring rods are fixedly mounted on the periphery of the rotating shaft between the conical block and the bushing. Square stirring frames are fixedly mounted on the outer periphery of the bushing and on the inner side of the vertical portion of the stirring rods, with the stirring frames spaced vertically. A mesh stirring element is fixedly mounted inside each stirring frame. Turntables are rotatably mounted on the inner walls of both the left and right sides of the hopper. Several L-shaped support rods are fixedly mounted on the periphery of the turntables, and a turning spade is fixedly mounted at the tail end of each support rod. A discharge pipe with a discharge valve is connected to the bottom of one side of the hopper.

2. The arsenic-containing hazardous waste reduction treatment device according to claim 1, characterized in that, The bottom end of the bushing extends out of the hopper and is fixedly fitted with a first driven bevel gear. The bottom end of the rotating shaft extends out of the bushing and is fixedly fitted with a second driven bevel gear. A first motor is fixedly mounted on the outer bottom of the hopper. A driving bevel gear is fixedly fitted on the output shaft of the first motor. The first driven bevel gear and the second driven bevel gear are positioned opposite each other on the upper and lower sides of the driving bevel gear and are both perpendicularly meshed with the driving bevel gear.

3. The arsenic-containing hazardous waste reduction treatment device according to claim 1, characterized in that, A second motor is fixedly mounted on the outer side of the hopper corresponding to the turntable. The output shaft of the second motor extends into the hopper and is coaxially and fixedly connected to the corresponding turntable.

4. The arsenic-containing hazardous waste reduction treatment device according to claim 1, characterized in that, The mesh mixing element is formed by the intersection of several vertical bars and several horizontal bars.

5. The arsenic-containing hazardous waste reduction treatment device according to claim 1, characterized in that, The upper surfaces of both the cone block and the feed trough are coated with a wear-resistant ceramic coating.

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