An assembled mud-sand separation sand making module and a running process thereof

Abstract

The application discloses an assembled mud-sand separation sand making module and a running process thereof, and the module comprises a drum screen, a collecting hopper, a spiral mud-sand separator, a wheeled mud-sand separator, a vibrating screen, a fine sand recycling device, a finished sand conveying belt, a water circulation device, a water circulation control system and a mud-sand separation control system. The mud-sand separated from engineering waste can be used to produce finished sand meeting engineering requirements. The application greatly reduces the floor space of the mud-sand separation device and realizes high integration of the mud-sand separation process. Meanwhile, the application realizes efficient and high-quality recycling of water resources and improves the utilization rate of water resources. The application solves the technical problem that the traditional mud-sand separation device is difficult to be normally used in a narrow space. The application optimizes the layout of the mud-sand separation device, and the adopted assembled mud-sand separation sand making method effectively improves the mud-sand separation technical level and reduces the labor cost.

Description

Technical Field

[0001] This invention relates to the field of construction waste resource utilization, and in particular to a prefabricated mud and sand separation and sand making module and its operation process. Background Technology

[0002] With the continuous advancement of urbanization and the construction of new rural areas in my country, coupled with the ban on sand mining in most rivers due to ecological protection, the natural sand and gravel resources needed in the civil engineering field are becoming increasingly scarce. At the same time, the amount of construction waste generated in my country's engineering construction sector is increasing daily, gradually becoming an obstacle to high-quality regional development. Using mud-sand separation equipment to separate sand from construction waste for use in engineering construction is currently a good method to solve the shortage of construction sand and the increase in construction waste.

[0003] Currently, the traditional mud and sand separation equipment (annual production capacity of 800,000 tons of finished sand) production area is equipped with 2 feeders, 2 grinding mills, 2 vibrating screens, 1 grading vibrating screen, 1 sand washing machine, 1 dewatering machine, 2 fine sand recovery machines, 1 mud filter press, and 1 mud storage tower, etc. Supporting public works, auxiliary works, and environmental protection works are also constructed. From the feeding equipment to the finished sand outlet, the entire production area of ​​the equipment occupies approximately 1200m². 2 However, for some mud and sand separation sites with limited land area, such large equipment cannot be used for normal on-site production, and transporting engineering waste off-site will increase the construction cost. Summary of the Invention

[0004] The purpose of this invention is to address the technical problem that traditional mud and sand separation equipment occupies a large area and cannot be used normally in confined construction spaces, and to propose a prefabricated mud and sand separation and sand making module.

[0005] This invention provides a prefabricated mud and sand separation and sand making module, which includes: a drum screen, a collection hopper, a spiral mud and sand separator, a wheel mud and sand separator, a vibrating screen, a fine sand recovery device, a finished sand conveyor belt, a water circulation device, a water circulation control system, and a mud and sand separation control system. The drum screen, hopper, and spiral mud-sand separator are arranged sequentially from top to bottom, and the spiral mud-sand separator, wheel mud-sand separator, and vibrating screen are arranged sequentially in the horizontal direction. The drum screen, hopper, and spiral mud-sand separator are all inclined in the same direction. One end of the drum screen feed hopper is located at the high end, and the low end of the hopper is equipped with a collection pipe. The collection pipe is opposite to the feed inlet of the spiral mud-sand separator. The end of the spiral mud-sand separator facing the wheel mud-sand separator is located at the high end, and the discharge port of the spiral mud-sand separator is located at its high end, opposite to the feed inlet of the wheel mud-sand separator. A spiral mud-sand separator is used in conjunction with a wheel mud-sand separator for mud-sand separation. The finished sand conveyor belt is located behind the vibrating screen, and the fine sand recovery equipment is located above the spiral mud-sand separator and the wheel mud-sand separator; The water circulation equipment is connected to the drum screen, hopper, spiral mud and sand separator, wheel mud and sand separator, vibrating screen and fine sand recovery equipment via pipelines.

[0006] Furthermore, the drum screen includes: a mud and sand inlet, a material distribution zone, an optimization zone, a screening zone, a tailings zone, and a discharge outlet; the mud and sand inlet, material distribution zone, optimization zone, screening zone, tailings zone, and discharge outlet are connected in sequence. The drum screen is divided into an inner layer and an outer layer. The inner layer has a grid structure and is located in the optimization zone and the screening zone. The outer layer is located in the mud and sand inlet, the distribution zone, the optimization zone, the screening zone and the tailings zone. The outer layer has a sealed structure in the mud and sand inlet, the distribution zone, the optimization zone and the tailings zone, and a grid structure in the screening zone. The drum screen is also equipped with a cleaning pipe, which includes a main water supply pipe, a branch water supply pipe and a nozzle. The nozzle is connected to the branch water supply pipe. The main water supply pipe of the cleaning pipe is located in the middle of the drum screen and is arranged along the length of the drum screen. Branch water supply pipes are provided in the material distribution area, the optimization area and the screening area.

[0007] Furthermore, the material distribution area includes a canine tooth device, and the water distribution pipe within the material distribution area is located on the canine tooth device; The optimization zone includes: an optimizer and a chain-driven optimization ball. The optimizer is located between the inner and outer layers of the drum screen, and the chain-driven optimization ball is located on the inner layer of the drum screen. The optimizer is a magnet, and the chain-driven optimization ball is a steel ball with a diameter of 10mm to 30mm. The water distribution pipe of the optimization zone is located outside the optimizer. The screening section includes: a snap-on screen, which is located on the inner layer of the drum screen, and a water distribution pipe within the screening section is located above the snap-on screen; The snap-fit ​​screen includes: a snap fastener, a snap fastener cap, a snap-fit ​​screen, and a screen protection frame. The snap fastener cap is a hemispherical helmet-shaped nut, and the screen protection frame is a 10mm diameter threaded steel bar protection frame. The snap fastener is located in the snap fastener cap, and the snap fastener cap is threadedly connected to the inner layer of the drum screen. The snap-fit ​​screen and the screen protection frame are connected to the inner layer of the drum screen through the snap fastener and the snap fastener cap. The screen protection frame is stacked on top of the snap-fit ​​screen.

[0008] Furthermore, the collecting hopper includes: a collecting shell, a collecting water pipe, a collecting nozzle, and a collecting pipe. The collecting shell is located below the material separation area, optimization area, screening area, and tailings area of ​​the drum screen. The collecting water pipe is connected to the main water pipe of the drum screen. The collecting nozzle is located on the collecting water pipe. The collecting pipe is located above the spiral mud and sand separator.

[0009] Furthermore, the spiral mud and sand separator includes: a spiral rotor, a spiral support shaft, a spiral water supply pipe, a spiral nozzle, and a trough. The spiral rotor is located on the spiral support shaft. The spiral water supply pipe is connected to the main water supply pipe of the drum screen and is located inside the spiral support shaft. The spiral nozzle is located outside the spiral support shaft and is connected to the spiral water supply pipe. The spiral rotor and the spiral support shaft are located inside the trough.

[0010] Furthermore, the wheel-type mud and sand separator includes: an impeller, an impeller support shaft, a wheel-type water supply pipe, a wheel-type nozzle, and a wheel groove. The impeller is located on the impeller support shaft, the wheel-type water supply pipe is connected to the main water supply pipe of the drum screen, the wheel-type water supply pipe is located inside the impeller support shaft, the wheel-type nozzle is connected to the wheel-type water supply pipe, and the wheel-type nozzle is located on the wheel-type water supply pipe and faces the inside of the impeller.

[0011] Furthermore, the vibrating screen includes: a vibrating screen mesh, a vibrator, a vibrating water supply pipe, and a vibrating nozzle. The vibrating screen mesh is located above the vibrator, the vibrating water supply pipe is located between the vibrating screen mesh and the vibrator, the vibrating water supply pipe is connected to the main water supply pipe of the drum screen, and the vibrating nozzle is located on the vibrating water supply pipe and faces one side of the vibrating screen mesh.

[0012] Furthermore, the fine sand recovery equipment includes: a megasonite particle separator, a hydrocyclone, and a microwave sieving device, wherein the megasonite particle separator is connected to the hydrocyclone, and the hydrocyclone is connected to the microwave sieving device; The water circulation equipment includes: a water source, a clean water room, a wastewater room, a microwave flocculant room, and a filter press room; The filter presses used in the filter press room are belt vacuum filters and diaphragm filter presses; The belt vacuum filter includes: a slurry inlet, a filtering device, a conveyor belt, a vacuum chamber, a drive motor, a filter residue outlet, and a filtrate outlet. The conveyor belt is a mesh. The filtering device includes: a filter screen, a filter frame, and a filter screen ultrasonic cleaner. The filter frame includes: a triangular prism filter screen, a triangular prism filter support, and a filter support cover. The triangular prism filter screen is located outside the triangular prism filter support. The upper end of the triangular prism filter support is connected to the filter support cover. The lower end of the triangular prism filter support is 5mm away from the upper surface of the filter screen. The slurry inlet is connected to the filtering device. The filtering device is located on the conveyor belt. The conveyor belt is located above the vacuum chamber. The conveyor belt is connected to the drive motor. The filter residue outlet is located on the conveyor belt and connected to the filtering device. The filtrate outlet is located below the vacuum chamber. The filter screen is located on the conveyor belt. The filter screen ultrasonic cleaner is located below the filter frame support cover. The conveyor belt mesh, the triangular prism filter screen, and the filter screen aperture decrease sequentially. The water source is connected to the clean water room, the clean water room is connected to the cleaning pipe, the sewage room is connected to the microwave flocculant room, and the microwave flocculant room is connected to the filter press.

[0013] Another object of the present invention is to provide the operation process of the prefabricated mud and sand separation and sand making module, including the following steps: S1. The mud and sand separated from the engineering waste are conveyed to the drum screen by the conveyor belt. The drum screen is controlled by the mud and sand separation control system so that the mud and sand pass through the material distribution area, optimization area, screening area and tailing area of ​​the drum screen in sequence. After the initial mud and sand separation, optimization and screening, the sand falls into the collection hopper in the screening area. The mud and sand with a particle size greater than 5mm is discharged from the drum screen through the discharge port of the tailing area. S2. The mud and sand falling into the collection hopper are washed and then fall into the spiral mud and sand separator. After passing through the spiral mud and sand separator, the mud and sand enter the wheel mud and sand separator under the rotation of the spiral. After passing through the wheel mud and sand separator, the sand enters the vibrating screen under the drive of the impeller. S3. The fine sand recovery equipment separates the fine sand in the mud during the mud-sand separation process and then transports it to the spiral mud-sand separator for recovery. S4. The sand after passing through the vibrating screen is conveyed to the finished sand storage area via the finished sand conveyor belt.

[0014] Furthermore, the fineness modulus of the finished sand is 2.0~2.9, the mud content is 0.5%~2.9%, and the crushing index is 5%~26%.

[0015] This invention utilizes a prefabricated mud and sand separation and sand making module to optimize the layout of mud and sand separation equipment, achieving a footprint of only 330m². 2 First, it reduces the land area required; second, it enables efficient and high-quality recycling of water resources, improving water resource utilization; and third, the prefabricated mud and sand separation and sand making method adopted effectively improves the level of mud and sand separation technology. This invention significantly reduces labor costs and also effectively improves the quality of the finished sand produced by mud and sand separation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the layout of a prefabricated mud and sand separation and sand making module.

[0017] Figure 2 This is a schematic diagram of a prefabricated mud and sand separation and sand making module.

[0018] Figure 3 This is a schematic diagram of a drum screen for a prefabricated mud and sand separation and sand making module.

[0019] Figure 4 This is a schematic diagram of the optimization zone of a prefabricated mud and sand separation and sand making module.

[0020] Figure 5 This is a schematic diagram of the screening section of a prefabricated mud and sand separation and sand making module.

[0021] Figure 6 This is a schematic diagram of a prefabricated mud and sand separation and sand making module, including a spiral mud and sand separator, a wheel mud and sand separator, a fine sand recovery device, and a vibrating screen.

[0022] Figure 7 This is a schematic diagram of a belt vacuum filter and a diaphragm filter press for a prefabricated mud and sand separation and sand making module.

[0023] Figure 8 This is a schematic diagram of a mega-sonic cleaning machine for the filter screen of a prefabricated mud and sand separation and sand making module.

[0024] In the diagram: 1. Rotary drum screen; 2. Collection hopper; 3. Spiral mud and sand separator; 4. Wheel mud and sand separator; 5. Vibrating screen; 6. Fine sand recovery equipment; 7. Finished sand conveyor belt; 8. Water circulation equipment; 9. Water circulation control system; 10. Mud and sand separation control system; 11. Control room; 12. Mud and sand inlet; 13. Material distribution area; 14. Optimization area; 15. Screening area; 16. Tailings area; 17. Discharge outlet; 18. Washing pipe ; 19. Inner layer; 20. Outer layer; 21. Main water supply pipe; 22. Branch water supply pipe; 23. Nozzle; 24. Dog tooth device; 25. Optimizer; 26. Chain optimization ball; 27. Snap-on screen; 28. Snap; 29. ​​Snap cap; 30. Snap-on screen; 31. Screen protection frame; 32. Collector shell; 33. Collector water supply pipe; 34. Collector nozzle; 35. Collector pipe; 36. Spiral; 37. Spiral support shaft; 38. Spiral water conveying pipe; 39. Spiral nozzle; 40. Trough; 41. Impeller; 42. Impeller support shaft; 43. Wheel-type water conveying pipe; 44. Wheel-type nozzle; 45. Wheel groove; 46. Vibrating screen; 47. Vibrator; 48. Vibrating water conveying pipe; 49. Vibrating nozzle; 50. Megasonic particle separator; 51. Hydrocyclone; 52. Microwave screening equipment; 53. Water source; 54. Clear water room; 55. Sewage room; 56. Micro 57. Filtration chamber; 58. Belt vacuum filter; 59. Diaphragm filter press; 60. Slurry inlet; 61. Filtration device; 62. Conveyor filter belt; 63. Vacuum chamber; 64. Drive motor; 65. Filter residue outlet; 66. Filtrate outlet; 67. Filter screen; 68. Filter frame; 69. Filter screen ultrasonic cleaner; 70. Triangular prism filter screen; 71. Triangular prism filter support; 72. Filter support cover. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] like Figure 1 and Figure 2 As shown, a prefabricated mud and sand separation and sand making module includes: a drum screen 1, a collection hopper 2, a spiral mud and sand separator 3, a wheel mud and sand separator 4, a vibrating screen 5, a fine sand recovery device 6, a finished sand conveyor belt 7, a water circulation device 8, a water circulation control system 9, a mud and sand separation control system 10, and a control room 11. The drum screen 1 is located above the collection hopper 2, the collection hopper 2 is located above the spiral mud and sand separator 3, and the wheel mud and sand separator 4 is located above the spiral mud and sand separator 5. Behind the machine 3, the vibrating screen 5 is located behind the wheel-type mud and sand separator 4, the finished sand conveyor belt 7 is located behind the vibrating screen 5, the fine sand recovery device 6 is located above the spiral mud and sand separator 3 and the wheel-type mud and sand separator 4, the water circulation device 8 is connected to the drum screen 1, the collection hopper 2, the spiral mud and sand separator 3, the wheel-type mud and sand separator 4, the vibrating screen 5 and the fine sand recovery device 6 through pipelines, and the water circulation control system 9 and the mud and sand separation control system 10 are located in the control room 11.

[0028] Specifically, the drum screen, hopper, and spiral mud-sand separator are arranged in order from top to bottom, and the spiral mud-sand separator, wheel mud-sand separator, and vibrating screen are arranged in order in the horizontal direction. The drum screen, hopper, and spiral mud-sand separator are all inclined in the same direction. One end of the drum screen feed hopper is located at the high end, and the low end of the hopper is equipped with a collection pipe. The collection pipe is opposite to the feed inlet of the spiral mud-sand separator. The end of the spiral mud-sand separator facing the wheel mud-sand separator is located at the high end, and the discharge port of the spiral mud-sand separator is located at its high end, opposite to the feed inlet of the wheel mud-sand separator. like Figure 6As shown, the spiral mud and sand separator 3 includes: a spiral 36, a spiral support shaft 37, a spiral water supply pipe 38, a spiral nozzle 39, and a trough 40. The spiral 36 is located on the spiral support shaft 37. The spiral water supply pipe 38 is connected to the main water supply pipe 21 of the drum screen 1 and is located inside the spiral support shaft 37. The spiral nozzle 39 is connected to the spiral water supply pipe 38 and is located outside the spiral support shaft 37. The spiral 36 and the spiral support shaft 37 are located inside the trough 40.

[0029] like Figure 6 As shown, the wheel-type mud and sand separator 4 includes: an impeller 41, an impeller support shaft 42, a wheel-type water supply pipe 43, a wheel-type nozzle 44, and a wheel groove 45. The impeller 41 is located on the impeller support shaft 42. The wheel-type water supply pipe 43 is connected to the main water supply pipe 21 of the drum screen 1. The wheel-type water supply pipe 43 is located inside the impeller support shaft 42. The wheel-type nozzle 44 is located on the wheel-type water supply pipe 43 and faces the inside of the impeller 41.

[0030] This invention, through the installation of a spiral water supply pipe within a spiral support shaft and a spiral nozzle connected to the spiral water supply pipe, separates mud and sand during the rotation of the spiral. The sand at the output end still contains a certain amount of mud, which is then fed into a wheel-type mud-sand separator. Through the wheel-type water supply pipe and wheel-type nozzle installed within the impeller support shaft, the mud in the sand is further separated from the sand under the rotation of the impeller, meeting the usage requirements. The spiral mud-sand separator and the wheel-type mud-sand separator, due to their different sand removal methods, are organically combined when used together, effectively improving the mud-sand separation efficiency and providing process support for reducing the mud content in sand.

[0031] This invention reduces the footprint of the mud and sand separation equipment by utilizing vertical space. From top to bottom, a drum screen, a collection hopper, and a spiral mud and sand separator are placed sequentially, while horizontally, a spiral mud and sand separator, a wheel mud and sand separator, and a vibrating screen are arranged sequentially. The entire system occupies only 330m². 2 At the same time, it can achieve an annual production of 8.7 million to 10.2 million tons of finished sand.

[0032] like Figure 3 , Figure 4 and Figure 5 As shown, the drum screen 1 of the mud and sand separation equipment includes: a mud and sand inlet 12, a material distribution zone 13, an optimization zone 14, a screening zone 15, a tailings zone 16, a discharge outlet 17, and a washing pipe 18; the mud and sand inlet 12 is connected to the material distribution zone 13, the material distribution zone 13 is connected to the optimization zone 14, the optimization zone 14 is connected to the screening zone 15, the screening zone 15 is connected to the tailings zone 16, and the tailings zone 16 is connected to the discharge outlet 17.

[0033] The drum screen 1 is divided into an inner layer 19 and an outer layer 20. The inner layer 19 has a mesh structure and is located in the optimization zone 14 and the screening zone 15. The outer layer 20 is located in the mud and sand inlet 12, the distribution zone 13, the optimization zone 14, the screening zone 15 and the tailing zone 16. The outer layer 20 has a sealed structure in the mud and sand inlet 12, the distribution zone 13, the optimization zone 14 and the tailing zone 16, and a mesh structure in the screening zone 15. The cleaning pipe 18 includes a main water supply pipe 21, a branch water supply pipe 22, and a nozzle 23. The branch water supply pipe 22 is connected to the main water supply pipe 21, and the nozzle 23 is located on the branch water supply pipe 22. The main water supply pipe 21 of the cleaning pipe 18 is located in the middle of the drum screen 1 and is arranged along the length of the drum screen 1. The branch water supply pipe 22 is also arranged in the material distribution zone 13, the optimization zone 14, and the screening zone 15. This invention utilizes a rotary drum screen to disperse, optimize, and screen mud and sand in stages during rotation, discharging coarse particles larger than 5mm from the drum screen. The mud and sand are then separated multiple times through a washing pipe. This not only optimizes the mud and sand separation process but also organically integrates various processes, significantly optimizing the particle size distribution of the sand while reducing the mud content in it.

[0034] Optionally, the material distribution area 13 includes a canine tooth device 24, and the water distribution pipe 22 in the material distribution area 13 is located on the canine tooth device 24. By adding a water distribution pipe and nozzle to the canine tooth device, not only can large pieces of mud and sand be dispersed, but the mud and sand separation function of the material distribution area is also increased, making full use of the equipment space, improving the mud and sand separation efficiency and effectively reducing the mud content in the finished sand.

[0035] Optionally, the optimization zone 14 includes: an optimizer 25 and a chain-linked optimization ball 26. The optimizer 25 is located between the inner layer 19 and the outer layer 20 of the drum screen, and the chain-linked optimization ball 26 is located on the inner layer 19 of the drum screen. The optimizer is a magnet, and the chain-linked optimization ball is a string of steel balls with a diameter of 10mm to 30mm. The water distribution pipe 22 in the optimization zone 14 is located outside the optimizer 25. By fixing the magnet optimizer 25 to the inner layer of the drum screen 1, when the magnet optimizer 25 rotates to the bottom of the drum screen 1, it attracts the chain-linked optimization ball 26 and rotates with the drum screen 1 to the top. The optimizer 25 falls under the action of gravity, crushing the larger particles in the bottom sand, thereby reducing the fineness modulus of the sand. At the same time, it crushes the sand with lower strength, thereby reducing the crushing index of the sand, and increasing the firmness of the sand while optimizing the sand gradation. Optionally, the screening section 15 includes: a snap-on screen 27, the snap-on screen 27 being located on the inner layer 19 of the drum screen 1, and the water distribution pipe 22 within the screening section 15 being located above the snap-on screen 27. The snap-fit ​​screen 27 includes: a snap 28, a snap cap 29, a snap-fit ​​screen 30, and a screen protection frame 31. The snap cap 29 is a hemispherical helmet-shaped nut, and the screen protection frame is a 10mm diameter threaded steel bar protective frame. The snap 28 is located in the snap cap 29, and the snap cap 29 is threadedly connected to the inner layer of the drum screen 1. The snap-fit ​​screen 30 and the screen protection frame 31 are connected to the inner layer 19 of the drum screen 1 through the snap 28 and the snap cap 29. The screen protection frame 31 is stacked on top of the snap-fit ​​screen 30. By setting the screen inside the drum screen 1 to a snap-fit ​​connection, the screen replacement is convenient and the screen replacement efficiency is improved. At the same time, adding a steel bar protective frame to the snap-fit ​​screen effectively reduces the impact and friction of sand on the screen and improves the service life of the screen.

[0036] Optional, such as Figure 3 As shown, the collecting hopper 2 includes: a collecting shell 32, a collecting water supply pipe 33, a collecting nozzle 34, and a collecting pipe 35. The collecting shell 32 is located below the material distribution zone 13, optimization zone 14, screening zone 15, and tailings zone 16 of the drum screen 1. The collecting water supply pipe 33 is connected to the main water supply pipe 21 of the drum screen 1. The collecting nozzle 34 is located on the collecting water supply pipe 33, and the collecting pipe 35 is located above the spiral mud-sand separator 3. The addition of a collecting nozzle in the collecting hopper further separates the mud and sand, thereby providing process support for reducing the mud content in the sand.

[0037] Optional, such as Figure 6 As shown, the vibrating screen 5 includes: a vibrating screen 46, a vibrator 47, a vibrating water supply pipe 48, and a vibrating nozzle 49. The vibrating screen 46 is located above the vibrator 47, and the vibrating water supply pipe 48 is located between the vibrating screen 46 and the vibrator 47. The vibrating water supply pipe 48 is connected to the main water supply pipe 21 of the drum screen 1. The vibrating nozzle 49 is located on the vibrating water supply pipe 48 and faces one side of the vibrating screen 46. The vibrating water supply pipe and vibrating nozzles located below the vibrating screen not only facilitate the removal of fine sand stuck on the screen, but also provide a final cleaning of the sand before discharge, offering process support for reducing the mud content in the sand.

[0038] Optional, such as Figure 6 As shown, the fine sand recovery equipment 6 includes: a megasonic particle separator 50, a hydrocyclone 51, and a microwave screening device 52. The megasonic particle separator 50 is connected to the hydrocyclone 51, and the hydrocyclone 51 is connected to the microwave screening device 52. Through megasonic waves and hydrocyclones, the fine sand separation efficiency and recovery rate are effectively improved, thereby providing process support for sand gradation optimization, while simultaneously increasing the output of washed sand and the resource utilization rate of engineering waste.

[0039] Optional, such as Figure 1 , Figure 7 and Figure 8 As shown, the water circulation equipment 8 includes: a water source 53, a clear water chamber 54, a wastewater chamber 55, a microwave flocculation reagent chamber 56, and a filter press 57. The filter press 57 uses a belt vacuum filter 58 and a diaphragm filter press 59. The water source 53 is connected to the clear water chamber 54, which is connected to the cleaning pipe 18. The wastewater chamber 55 is connected to the microwave flocculation reagent chamber 56, which is connected to the filter press 57. Using microwave flocculation technology effectively improves the flocculation efficiency of mud in slurry, reduces flocculation costs, and further reduces the amount of flocculant used by the belt vacuum filter, improving filter press efficiency and eliminating the need for a thickening tank, while also saving the floor space required for the thickening tank.

[0040] Optionally, the belt vacuum filter 58 includes: a mud inlet 60, a filter device 61, a conveyor filter belt 62, a vacuum chamber 63, a drive motor 64, a filter residue outlet 65, and a filtrate outlet 66. The conveyor filter belt 62 is a mesh with a mesh aperture of 4.75 mm. The filter device 61 includes: a filter screen 67, a filter frame 68, and a filter screen ultrasonic cleaner 69. The filter screen has a mesh aperture of 0.075 mm. The filter frame 68 includes: a triangular prism filter screen 70, a triangular prism filter support 71, and a filter support cover 72. The triangular prism filter screen 70 has a mesh aperture of 0.15 mm and is located outside the triangular prism filter support 71. The upper end of the triangular prism filter support 71 is connected to the filter support cover 72, and the lower end of the triangular prism filter support 71 is connected to the filter screen 67. The upper surface spacing is 5mm. The mud inlet 60 is connected to the filter device 61, which is located on the conveyor belt 62. The conveyor belt 62 is located above the vacuum chamber 63 and is connected to the drive motor 64. The filter residue outlet 65 is located on the conveyor belt 62 and connected to the filter device 61. The filtrate outlet 66 is located below the vacuum chamber 63. The filter screen 67 is located on the conveyor belt 62, and the filter screen ultrasonic cleaner 69 is located below the filter frame support cover 72. By setting a filter frame and a filter screen ultrasonic cleaner on the filter screen, and utilizing the fact that the pore size of the triangular prism filter screen on the filter frame is larger than that of the filter screen and the ultrasonic cleaning function of the filter screen, the technical problem of mud clogging the screen due to the small pore size of the filter screen during the mud-water separation process is effectively avoided.

[0041] The sand making process of the prefabricated mud and sand separation and sand making module includes the following steps: S1. The mud and sand separated from the engineering waste are conveyed to the drum screen 1 by a conveyor belt. The drum screen is controlled by the mud and sand separation control system so that the mud and sand pass through the material distribution area, optimization area, screening area and tailing area of ​​the drum screen in sequence. After preliminary mud and sand separation, optimization and screening, the sand falls into the collection hopper in the screening area. The mud and sand with a particle size greater than 5mm is discharged from the drum screen 1 through the outlet of the tailing area. S2. The mud and sand falling into the collection hopper are washed and then fall into the spiral mud and sand separator. After passing through the spiral mud and sand separator, the mud and sand enter the wheel mud and sand separator under the rotation of the spiral. After passing through the wheel mud and sand separator, the sand enters the vibrating screen under the drive of the impeller. The fine sand recovery equipment separates the fine sand in the mud slurry during the mud and sand separation process and then transports it to the spiral mud and sand separator for recovery. S3. The mud slurry after mud and sand separation is separated into clean water and mud cake by water circulation equipment, and the clean water is continued to be recycled. S4. The sand after passing through the vibrating screen is conveyed to the finished sand storage area via the finished sand conveyor belt.

[0042] Optionally, the fineness modulus of the finished sand is 2.0~2.9, the mud content is 0.5%~2.9%, and the crushing index is 5%~26%. The prefabricated mud-sand separation method makes full use of the vertical space within the equipment's footprint and utilizes the gravitational potential energy of mud and water for mud-sand separation, significantly improving the mud-sand separation efficiency and ensuring that the produced finished sand meets the requirements for construction sand.

[0043] This invention discloses a prefabricated mud and sand separation and sand making module and method. By assembling the mud and sand separation equipment in a vertical direction, it effectively utilizes the gravity of mud, sand and water flow for multi-level separation, significantly reducing the equipment footprint, optimizing the mud and sand separation process design, and realizing water recycling. It not only produces sand that meets engineering requirements, but also innovatively uses a vacuum filter for mud treatment, further reducing the cost of mud and sand separation equipment and reducing the footprint of water recycling equipment. It also improves the integration level of mud and sand separation equipment, significantly improving the technical level of engineering mud and sand separation equipment, and providing technical support for the high-quality development of mud and sand separation equipment.

[0044] Example 1 The sand making process of the prefabricated mud and sand separation and sand making module in this embodiment of the invention is as follows: Figure 1As shown, construction waste A with a sand content of 75% and a mud content of 20% (5% stone content, sand fineness modulus of 3.1) is separated from the mains waste and then conveyed to the prefabricated mud and sand separation and sand making module via a conveyor belt. Under the control of the water circulation control system and the mud and sand separation control system, the mud and sand pass through the mud and sand inlet, distribution zone, optimization zone, screening zone, tailings zone and outlet of the drum screen in sequence under the action of the rotating drum screen and its own weight. The mud and sand are dispersed, optimized, screened and separated, and the mud and sand larger than 5m are separated. Particles smaller than 5mm are discharged from the drum screen through the outlet. Particles smaller than 5mm, under their own weight and the action of water flow, pass through the drum screen's screening sections and sequentially enter the collection hopper, spiral mud-sand separator, wheel mud-sand separator, and vibrating screen for mud-sand separation. The mud generated during the separation process is used to recover fine sand through a fine sand recovery device. The separated sand and recovered fine sand are then conveyed to the finished sand stockpile area via a finished sand conveyor belt. Simultaneously, the mud slurry after mud-sand separation is separated into clean water and mud cake through a water circulation device, with the clean water being recycled. The finished sand produced by the prefabricated mud-sand separation and sand making module and its method has a fineness modulus of 2.5, a mud content of 2.1%, and a crushing index of 15%.

[0045] Example 2 The sand making process of the prefabricated mud and sand separation and sand making module in this embodiment of the invention is as follows: Figure 1 As shown, engineering waste soil B with a sand content of 60% and a mud content of 25% (stone content of 15%, sand fineness modulus of 3.0) is separated from the mains waste and then conveyed to the prefabricated mud and sand separation and sand making module via a conveyor belt. Under the control of the water circulation control system and the mud and sand separation control system, the mud and sand pass through the mud and sand inlet, distribution zone, optimization zone, screening zone, tailings zone and outlet of the drum screen in sequence under the action of the rotating drum screen and its own weight. The mud and sand are dispersed, optimized, screened and separated, and the mud and sand with a content greater than 5% is separated. Particles smaller than 5mm are discharged from the drum screen through the outlet. Particles smaller than 5mm, under their own weight and the action of water flow, pass through the drum screen's screening sections and sequentially enter the collection hopper, spiral mud-sand separator, wheel mud-sand separator, and vibrating screen for mud-sand separation. The mud generated during the separation process is used to recover fine sand through a fine sand recovery device. The separated sand and recovered fine sand are then conveyed to the finished sand stockpile area via a finished sand conveyor belt. Simultaneously, the mud slurry from the mud-sand separation process is used to separate clean water and mud cake through a water circulation device; the clean water is then recycled. The finished sand produced by the prefabricated mud-sand separation and sand making module and its method has a fineness modulus of 2.9, a mud content of 2.6%, and a crushing index of 25%.

[0046] Example 3 The sand making process of the prefabricated mud and sand separation and sand making module of this invention is as follows: Figure 1As shown, engineering waste soil C with a sand content of 85% and a mud content of 10% (5% stone content, sand fineness modulus of 2.9) is separated from the mains soil and conveyed to the prefabricated mud and sand separation and sand making module via a conveyor belt. Under the control of the water circulation control system and the mud and sand separation control system, the mud and sand pass through the mud and sand inlet, distribution zone, optimization zone, screening zone, tailings zone and outlet of the drum screen in sequence under the action of the rotating drum screen and its own weight. The mud and sand are dispersed, optimized, screened and separated, and the mud and sand larger than 5m are separated. Particles smaller than 5mm are discharged from the drum screen through the outlet. Particles smaller than 5mm, under their own weight and the action of water flow, pass through the drum screen's screening sections and sequentially enter the collection hopper, spiral mud-sand separator, wheel mud-sand separator, and vibrating screen for mud-sand separation. The mud generated during the separation process is used to recover fine sand through a fine sand recovery device. The separated sand and recovered fine sand are then conveyed to the finished sand stockpile area via a finished sand conveyor belt. Simultaneously, the mud slurry from the mud-sand separation process is used to separate clean water and mud cake through a water circulation device; the clean water is then recycled. The finished sand produced by the prefabricated mud-sand separation and sand making module and its method has a fineness modulus of 2.0, a mud content of 0.5%, and a crushing index of 5%.

[0047] This invention utilizes a prefabricated sand-mud separation module and method to produce finished sand with a fineness modulus of less than 2.9, a mud content of less than 2.9%, and a crushing index of less than 29% from engineering waste soil with varying sand and mud contents and large fineness moduli. The produced finished sand can meet the needs of mixing plants and engineering projects. The equipment is highly integrated and occupies a small area, with an installed power of 745~820kw and a footprint of 60m (length) × 5.5m (width) × 18m (height). Depending on the engineering waste soil processing volume, it can achieve a capacity of 200~250t / h, and can be upgraded to achieve a capacity of 600~750t / h. The application range is within 15km of the engineering waste soil generation site and within 15km of the commercial concrete mixing plant, with the optimal application range being within 1km of the engineering waste soil generation site and within 5km of the commercial concrete mixing plant. On-site installation and disassembly are quick and convenient.

[0048] This invention utilizes the gravitational potential energy of mud and water flow to separate mud and sand, reducing energy consumption while improving separation efficiency and quality. It employs microwave and vacuum filtration technologies for intensive mud treatment, significantly reducing the cost of mud treatment equipment, substantially decreasing the footprint of mud treatment equipment, and improving the technological level of mud and sand separation equipment.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this application specification, they can still modify or make equivalent substitutions to the specific implementation of the present invention, but these modifications or changes do not depart from the protection scope of the pending claims of the present invention.

Claims

1. A fabricated slurry separation sand making module, characterized in that, The assembled mud and sand separation and sand making module includes: a drum screen, a collection hopper, a spiral mud and sand separator, a wheel mud and sand separator, a vibrating screen, a fine sand recovery equipment, a finished sand conveyor belt, a water circulation equipment, a water circulation control system, and a mud and sand separation control system. The drum screen, hopper, and spiral mud-sand separator are arranged sequentially from top to bottom, and the spiral mud-sand separator, wheel mud-sand separator, and vibrating screen are arranged sequentially in the horizontal direction. The drum screen, hopper, and spiral mud-sand separator are all inclined in the same direction. One end of the drum screen feed hopper is located at the high end, and the low end of the hopper is equipped with a collection pipe. The collection pipe is opposite to the feed inlet of the spiral mud-sand separator. The end of the spiral mud-sand separator facing the wheel mud-sand separator is located at the high end, and the discharge port of the spiral mud-sand separator is located at its high end, opposite to the feed inlet of the wheel mud-sand separator. A spiral mud-sand separator is used in conjunction with a wheel mud-sand separator for mud-sand separation. The finished sand conveyor belt is located behind the vibrating screen, and the fine sand recovery equipment is located above the spiral mud-sand separator and the wheel mud-sand separator; The water circulation equipment is connected to the drum screen, the collection hopper, the spiral mud and sand separator, the wheel mud and sand separator, the vibrating screen and the fine sand recovery equipment through pipelines. The drum screen includes: a mud and sand inlet, a material distribution zone, an optimization zone, a screening zone, a tailings zone, and a discharge outlet; the mud and sand inlet, material distribution zone, optimization zone, screening zone, tailings zone, and discharge outlet are connected in sequence. The material distribution area includes a canine tooth device, and the water distribution pipe in the material distribution area is located on the canine tooth device; The optimization zone includes: an optimizer and a chain optimization ball. The optimizer is located between the inner and outer layers of the drum screen, and the chain optimization ball is located on the inner layer of the drum screen. The optimizer is a magnet, and the chain optimization ball is a steel ball with a diameter of 10mm to 30mm. The water distribution pipe of the optimization zone is located outside the optimizer.

2. The prefabricated mud-sand separation and sand making module according to claim 1, characterized in that, The drum screen is divided into an inner layer and an outer layer. The inner layer has a grid structure and is located in the optimization zone and the screening zone. The outer layer is located in the mud and sand inlet, the distribution zone, the optimization zone, the screening zone and the tailings zone. The outer layer has a sealed structure in the mud and sand inlet, the distribution zone, the optimization zone and the tailings zone, and a grid structure in the screening zone. The drum screen is also equipped with a cleaning pipe, which includes a main water supply pipe, a branch water supply pipe and a nozzle. The nozzle is connected to the branch water supply pipe. The main water supply pipe of the cleaning pipe is located in the middle of the drum screen and is arranged along the length of the drum screen. Branch water supply pipes are provided in the material distribution area, the optimization area and the screening area.

3. The prefabricated mud-sand separation and sand making module according to claim 2, characterized in that, The screening section includes: a snap-on screen, which is located on the inner layer of the drum screen, and a water distribution pipe within the screening section is located above the snap-on screen; The snap-fit ​​screen includes: a snap fastener, a snap fastener cap, a snap-fit ​​screen, and a screen protection frame. The snap fastener cap is a hemispherical helmet-shaped nut, and the screen protection frame is a 10mm diameter threaded steel bar protection frame. The snap fastener is located in the snap fastener cap, and the snap fastener cap is threadedly connected to the inner layer of the drum screen. The snap-fit ​​screen and the screen protection frame are connected to the inner layer of the drum screen through the snap fastener and the snap fastener cap. The screen protection frame is stacked on top of the snap-fit ​​screen.

4. The prefabricated mud-sand separation and sand making module according to claim 2, characterized in that, The collecting hopper includes: a collecting shell, a collecting water pipe, a collecting nozzle, and a collecting pipe. The collecting shell is located below the material separation area, optimization area, screening area, and tailings area of ​​the drum screen. The collecting water pipe is connected to the main water pipe of the drum screen. The collecting nozzle is located on the collecting water pipe. The collecting pipe is located above the spiral mud and sand separator.

5. The prefabricated mud-sand separation and sand making module according to claim 2, characterized in that, The spiral mud and sand separator includes: a spiral device, a spiral support shaft, a spiral water supply pipe, a spiral nozzle, and a trough. The spiral device is located on the spiral support shaft. The spiral water supply pipe is connected to the main water supply pipe of the drum screen and is located inside the spiral support shaft. The spiral nozzle is located outside the spiral support shaft and is connected to the spiral water supply pipe. The spiral device and the spiral support shaft are located inside the trough.

6. The prefabricated mud-sand separation and sand making module according to claim 2, characterized in that, The wheel-type mud and sand separator includes: an impeller, an impeller support shaft, a wheel-type water supply pipe, a wheel-type nozzle, and a wheel groove. The impeller is located on the impeller support shaft. The wheel-type water supply pipe is connected to the main water supply pipe of the drum screen. The wheel-type water supply pipe is located inside the impeller support shaft. The wheel-type nozzle is connected to the wheel-type water supply pipe and is located on the wheel-type water supply pipe and faces the inside of the impeller.

7. The prefabricated mud-sand separation and sand making module according to claim 2, characterized in that, The vibrating screen includes: a vibrating screen mesh, a vibrator, a vibrating water supply pipe, and a vibrating nozzle. The vibrating screen mesh is located above the vibrator, the vibrating water supply pipe is located between the vibrating screen mesh and the vibrator, the vibrating water supply pipe is connected to the main water supply pipe of the drum screen, and the vibrating nozzle is located on the vibrating water supply pipe and faces one side of the vibrating screen mesh.

8. The prefabricated mud-sand separation and sand making module according to claim 1, characterized in that, The fine sand recovery equipment includes: a megasonite particle separator, a hydrocyclone, and a microwave sieving device. The megasonite particle separator is connected to the hydrocyclone, and the hydrocyclone is connected to the microwave sieving device. The water circulation equipment includes: a water source, a clean water room, a wastewater room, a microwave flocculant room, and a filter press room; The filter presses used in the filter press room are belt vacuum filters and diaphragm filter presses; The belt vacuum filter includes: a slurry inlet, a filtering device, a conveyor belt, a vacuum chamber, a drive motor, a filter residue outlet, and a filtrate outlet. The conveyor belt is a mesh. The filtering device includes: a filter screen, a filter frame, and a filter screen ultrasonic cleaner. The filter frame includes: a triangular prism filter screen, a triangular prism filter support, and a filter support cover. The triangular prism filter screen is located outside the triangular prism filter support. The upper end of the triangular prism filter support is connected to the filter support cover. The lower end of the triangular prism filter support is 5mm away from the upper surface of the filter screen. The slurry inlet is connected to the filtering device. The filtering device is located on the conveyor belt. The conveyor belt is located above the vacuum chamber. The conveyor belt is connected to the drive motor. The filter residue outlet is located on the conveyor belt and connected to the filtering device. The filtrate outlet is located below the vacuum chamber. The filter screen is located on the conveyor belt. The filter screen ultrasonic cleaner is located below the filter frame support cover. The conveyor belt mesh, the triangular prism filter screen, and the filter screen aperture decrease sequentially; The water source is connected to the clear water room, the clear water room is connected to the cleaning pipe provided on the drum screen, the sewage room is connected to the microwave flocculant room, and the microwave flocculant room is connected to the filter press.

9. The method of operating the prefabricated mud-sand separation and sand making module according to any one of claims 2-8, characterized in that, Includes the following steps: S1. The mud and sand separated from the engineering waste are conveyed to the drum screen by the conveyor belt. The drum screen is controlled by the mud and sand separation control system so that the mud and sand pass through the material distribution area, optimization area, screening area and tailing area of ​​the drum screen in sequence. After the initial mud and sand separation, optimization and screening, the sand falls into the collection hopper in the screening area. The mud and sand with a particle size greater than 5mm is discharged from the drum screen through the discharge port of the tailing area. S2. The mud and sand falling into the collection hopper are washed and then fall into the spiral mud and sand separator. After passing through the spiral mud and sand separator, the mud and sand enter the wheel mud and sand separator under the rotation of the spiral. After passing through the wheel mud and sand separator, the sand enters the vibrating screen under the drive of the impeller. S3. The fine sand recovery equipment separates the fine sand in the mud during the mud-sand separation process and then transports it to the spiral mud-sand separator for recovery. S4. The sand after passing through the vibrating screen is conveyed to the finished sand storage area via the finished sand conveyor belt.

10. The operating method of the prefabricated mud-sand separation and sand making module according to claim 9, characterized in that, The finished sand has a fineness modulus of 2.0 to 2.9, a mud content of 0.5% to 2.9%, and a crushing index of 5% to 26%.

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