Energy-saving and environment-friendly heavy metal pollution control equipment

Abstract

The energy-saving and environment-friendly heavy metal pollution prevention and treatment equipment comprises an obliquely-arranged bottom plate, two side plates are oppositely arranged on the bottom plate, the upper ends of the two side plates are rotationally connected with a roller with openings in the two ends, and the opening in the high end of the roller is a feeding opening; a feeding hopper extending into the feeding port is arranged on the side plate on the same side with the feeding port, an opening in the lower end of the roller is a large-particle solid phase outlet, a slurry hole is formed in the portion, located between the two side plates, of the roller, an outer gear ring is arranged on the roller in the circumferential direction, one side plate is rotationally connected with a first motor, and the other side plate is rotationally connected with a second motor. A gear meshed with the outer gear ring is arranged at the output end of the first motor; soil is washed, soil attached to the surface of a large-particle solid phase is washed and falls off to form slurry, the slurry is separated from the large-particle solid phase, then the slurry is washed, heavy metal in the solid phase is transferred into a liquid phase, the soil is fully washed, and secondary pollution is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of soil pollution remediation, and in particular to energy-saving and environmentally friendly heavy metal pollution prevention and control equipment. Background Art

[0002] With the development of industrial and agricultural modernization and urbanization in human society, heavy metal pollution in soil caused by human factors is an increasingly serious environmental problem in the world today. It is generally not easy to be leached with water in the soil and cannot be decomposed by soil microorganisms; on the contrary, organisms can enrich heavy metals, often causing heavy metals to gradually accumulate in the soil environment. Some heavy metal elements can even be converted into more toxic methyl compounds in the soil. Some can also accumulate in the human body at harmful concentrations through the food chain, seriously endangering human health. Compared with water pollution, heavy metal pollution of the soil environment is more difficult to control and has greater pollution hazards.

[0003] At present, the main remediation technologies for soil heavy metal pollution include physical remediation (turning over soil and imported soil method, etc.), chemical remediation (leaching and magnetic removal, etc.) and biological remediation (plants and microorganisms). Among them, the physical remediation method is large in engineering workload, time-consuming and labor-intensive, and the cost is too high. The biological remediation method has a long cycle and low efficiency, which affects the normal use of the land. The leaching technology in the chemical remediation method mainly extracts different forms of heavy metals in the soil through leaching agents, thereby removing the heavy metals in the soil. It has the characteristics of simple operation and low remediation cost, and has good application potential.

[0004] In the prior art, when using the ex situ soil leaching remediation method to treat soil heavy metal pollution, it is necessary to first use a screening machine and a crusher to screen and crush the contaminated soil to remove large solid particles (such as stones) in the soil, and then the screened and crushed soil is leached and filtered. During the screening, a large amount of soil will adhere to the surface of the large solid particles. This soil will be sieved and removed along with the large solid particles, and the heavy metals mixed in it will not be leached, and will return to the self, causing secondary pollution.

[0005] For example, a Chinese invention patent with patent publication number CN110026421B discloses a centrifugal soil heavy metal pollution control device, including a frame, a centrifugal filter device welded on the top of the frame, and a rinsing device fixed on the top of the centrifugal filter device by bolts, the rinsing device is connected to a dosing pipe, the dosing pipe is connected to a filter, and the filter is connected to the centrifugal filter device through a reflux pipe. When in use, large solid particles are first removed through a sieve plate, and the soil attached to the surface of the large solid particles will be removed together. The heavy metals mixed in the soil will cause secondary pollution to the soil, which is not conducive to energy saving and environmental protection. Summary of the invention

[0006] The embodiment of the present invention provides an energy-saving and environmentally friendly heavy metal pollution prevention and control equipment. The soil is rinsed before eluting, and the soil attached to the surface of the large solid particles is washed off to form mud, which is separated from the large solid particles. The mud is then eluted. This can solve the problem in the prior art that the soil attached to the surface of the large solid particles will be screened and removed along with the large solid particles, and the heavy metals doped therein cannot be eluted and will return to the original state, causing secondary pollution.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: an energy-saving and environmentally friendly heavy metal pollution prevention and control equipment, comprising an inclined bottom plate, two side plates are relatively arranged on the bottom plate, the upper ends of the two side plates are rotatably connected to a roller with openings at both ends, the opening at the high end of the roller is a feed port, and a feed hopper extending into the feed port is arranged on the side plate on the same side as the feed port, the opening at the low end of the roller is a large particle solid phase outlet, a mud hole is opened on the part of the roller located between the two side plates, an outer gear ring is arranged on the circumference of the roller, a first motor is rotatably connected to one of the side plates, and a gear meshing with the outer gear ring is arranged at the output end of the first motor;

[0008] It also includes a spray pipe extending into the interior of the drum and connected to an external water source through a water pump;

[0009] It also includes a mud box arranged at the lower end of the drum, wherein the upper end of the mud box is provided with a receiving hopper and a dosing port, the lower end of the side wall of the mud box on the same side as the feed hopper is provided with a mud outlet, and a mud-water separation device is provided at the mud outlet.

[0010] Preferably, the mud-water separation device includes an outer shell, an inner filter cartridge, a second motor, a spiral conveying shaft and a water outlet pipe, the outer shell is arranged at the mud outlet, the interior of the outer shell is fixedly connected with the inner filter cartridge connected with the mud outlet via a support rod, a mounting frame is arranged at one end of the outer shell away from the mud outlet, a second motor is arranged on the mounting frame, the output end of the second motor is fixedly connected with the spiral conveying shaft passing through the inner filter cartridge via a rotating shaft, and a water outlet pipe is arranged at the lower end of the outer shell.

[0011] Preferably, the spiral blades on the spiral conveying shaft change from sparse to dense along the conveying direction.

[0012] Preferably, the diameter of the spiral conveying shaft increases from small to large along the conveying direction.

[0013] Preferably, a filter cloth is provided on the inner wall of the inner filter cartridge.

[0014] Preferably, the lower end of the outer shell is a funnel-shaped structure, and the water outlet pipe is arranged at the bottom of the funnel-shaped structure.

[0015] Preferably, a guide rod is provided between the outer shell and the mounting frame, a pressure head movably connected to the rotating shaft is slidably connected to the guide rod, and a spring is provided between the pressure head and the mounting frame.

[0016] Preferably, a stirring shaft having one end extending through a side wall of the mud box is rotatably connected to the interior of the mud box, and a plurality of stirring paddles are provided on the stirring shaft.

[0017] Preferably, a driving pulley is provided at the output end of the first motor, and a driven pulley is provided at one end of the stirring shaft passing through the side wall of the mud box, and the driving pulley and the driven pulley are connected via a transmission belt.

[0018] Preferably, an arc-shaped guide groove is respectively provided at the upper end of the two side plates, and two annular sliding blocks matched with the arc-shaped guide groove are provided on the circumference of the drum.

[0019] Compared with the prior art, the present invention is provided with the coordination of a bottom plate, a side plate, a drum, a feed port, a feed hopper, a large-particle solid phase outlet, a mud hole, an outer gear ring, a first motor, a gear, a water pump, a spray pipe, a mud box, a receiving hopper, a dosing port, a mud outlet and a mud-water separation device. When working, the water pump and the first motor are started, and the water pump transports water from an external water source to the spray pipe and sprays it out from the spray pipe. The first motor drives the gear to rotate, and the gear drives the drum to rotate through the outer gear ring, and soil is added to the drum from the feed hopper at the feed port. Due to the inclined setting of the bottom plate, the large-particle solid phase in the soil will gradually move toward the large-particle solid phase outlet and be discharged. During the movement, the soil attached to its surface is washed to form mud, and the mud passes through the mud hole and falls into the mud box under the diversion action of the receiving hopper. The agent is added to the mud box through the dosing port to transfer the heavy metals in the solid phase to the liquid phase. Finally, the mud and water are separated by the mud-water separation device, so that the soil is fully washed to avoid secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the drum of the present invention;

[0022] Figure 3 It is a schematic diagram of the main cross-sectional structure of the mud box of the present invention;

[0023] Figure 4 It is a schematic diagram of the main cross-sectional structure of the mud-water separation device of the present invention;

[0024] Figure 5 For the present invention Figure 1 Schematic diagram of the structure of the middle roller in direction A;

[0025] Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0026] In the figure: 1. bottom plate; 2. side plate; 3. drum; 4. feed port; 5. large particle solid phase outlet; 6. mud hole; 7. outer gear ring; 8. first motor; 9. gear; 10. feed hopper; 11. spray pipe; 12. mud box; 13. receiving hopper; 14. dosing port; 15. mud outlet; 16. outer shell; 17. inner filter cartridge; 18. second motor; 19. screw conveyor shaft; 20. water outlet pipe; 21. filter cloth; 22. guide rod; 23. pressure head; 24. spring; 25. stirring shaft; 26. stirring paddle; 27. driving pulley; 28. driven pulley; 29. ​​transmission belt; 30. annular slider. DETAILED DESCRIPTION

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] like Figures 1 to 6 As shown, an energy-saving and environmentally friendly heavy metal pollution prevention and control device comprises an inclined bottom plate 1, two side plates 2 are arranged on the bottom plate 1 relatively, the upper ends of the two side plates 2 are rotatably connected with a drum 3 with openings at both ends, the opening at the high end of the drum 3 is a feed port 4, a feed hopper 10 extending into the feed port 4 is arranged on the side plate 2 on the same side as the feed port 4, the opening at the lower end of the drum 3 is a large particle solid phase outlet 5, a mud hole 6 is opened at the portion of the drum 3 located between the two side plates 2, an outer gear ring 7 is arranged on the circumference of the drum 3, a first motor 8 is rotatably connected to one of the side plates 2, and a gear 9 meshing with the outer gear ring 7 is arranged at the output end of the first motor 8;

[0029] It also includes a spray pipe 11 extending into the upper portion of the drum 3 and connected to an external water source through a water pump;

[0030] It also includes a mud box 12 arranged at the lower end of the drum 3, a receiving hopper 13 and a dosing port 14 are arranged at the upper end of the mud box 12, a mud outlet 15 is opened at the lower end of the side wall of the mud box 12 on the same side as the feed hopper 10, and a mud-water separation device is arranged at the mud outlet 15.

[0031] During specific use, the water pump and the first motor 8 are started, the water pump transports water from the external water source to the spray pipe 11 and sprays it out from the spray pipe 11, the first motor 8 drives the gear 9 to rotate, the gear 9 drives the drum 3 to rotate through the outer gear ring 7, and the soil is added to the drum 3 from the feed hopper 10 at the feed port 4. Since the bottom plate 1 is inclined, the large particles of solid phase in the soil will gradually move to the large particle solid phase outlet 5 and be discharged. During the movement, the soil attached to its surface is washed to form mud, and the mud passes through the mud hole 6 and falls into the mud box 12 under the diversion effect of the receiving hopper 13. The agent is added to the mud box 12 through the dosing port 14 to transfer the heavy metals in the solid phase to the liquid phase, and finally the mud and water are separated by the mud-water separation device.

[0032] In order to achieve the purpose of mud and water separation, preferably, the mud and water separation device includes an outer shell 16, an inner filter cartridge 17, a second motor 18, a screw conveying shaft 19 and a water outlet pipe 20. The outer shell 16 is arranged at the mud outlet 15, and the interior of the outer shell 16 is fixedly connected with the inner filter cartridge 17 connected to the mud outlet 15 through a support rod. An installation frame is provided at the end of the outer shell 16 away from the mud outlet 15, and the second motor 18 is provided on the installation frame. The output end of the second motor 18 is fixedly connected with the screw conveying shaft 19 penetrating the inner filter cartridge 17 through a rotating shaft, and the lower end of the outer shell 16 is provided with a water outlet pipe 20.

[0033] When in use, the water pump transports water from the external water source to the spray pipe 11 and sprays it out from the spray pipe 11. The first motor 8 drives the gear 9 to rotate, and the gear 9 drives the drum 3 to rotate through the outer gear ring 7, and the soil is added to the drum 3 from the feed hopper 10 at the feed port 4. Since the bottom plate 1 is inclined, the large solid particles in the soil will gradually move to the large solid phase outlet 5 and be discharged. During the movement, the soil attached to its surface is washed to form mud. The mud passes through the mud hole 6 and falls into the mud box 12 under the diversion effect of the receiving hopper 13, and is fed to the mud box 1 through the dosing port 14. 2, so that the heavy metals in the solid phase are transferred to the liquid phase, the second motor 18 drives the screw conveying shaft 19 to rotate, and the mud after reacting with the reagent is conveyed outward by the screw conveying shaft 19. During the conveying process, the water in the mud carries the heavy metals through the inner filter cartridge 17 into the outer shell 16, and is finally discharged from the outlet pipe 20. The sludge is discharged from the end of the inner filter cartridge 17 away from the mud outlet 15 to achieve mud-water separation; and the inclined bottom plate 1 makes the end of the mud-water separation device away from the mud outlet 15 higher, which is conducive to preventing the mud and water from being discharged with the sludge, and the mud-water separation effect is good.

[0034] In order to achieve the purpose of improving the mud-water separation effect, preferably, the spiral blades on the spiral conveying shaft 19 become dense along the conveying direction, and the second motor 18 drives the spiral conveying shaft 19 to rotate. The mud after reacting with the agent is conveyed outward by the spiral conveying shaft 19, so that the mud is gradually squeezed during the conveying process, and more water is separated from the sludge through the inner filter cartridge 17. The water in the mud carries heavy metals through the inner filter cartridge 17 into the outer shell 16 and is finally discharged from the outlet pipe 20. The sludge is discharged from the end of the inner filter cartridge 17 away from the mud outlet 15, and the mud-water separation effect is better.

[0035] In order to further improve the mud-water separation effect, preferably, the diameter of the spiral conveying shaft 19 increases along the conveying direction, and the gap between two adjacent spiral blades along the conveying direction gradually decreases, so that the mud is gradually squeezed during the conveying process, and more water is separated from the sludge through the inner filter cartridge 17, resulting in a better mud-water separation effect.

[0036] In order to achieve the purpose of improving the mud-water separation effect, preferably, a filter cloth 21 is provided on the inner wall of the inner filter cylinder 17. The filter cloth 21 can prevent mud from passing through, thereby improving the mud-water separation effect.

[0037] In order to facilitate the collection of waste water, preferably, the lower end of the outer shell 16 is a funnel-shaped structure, and the water outlet pipe 20 is arranged at the bottom of the funnel-shaped structure.

[0038] In order to further improve the mud-water separation effect, preferably, a guide rod 22 is provided between the outer shell 16 and the mounting frame, and a pressure head 23 movably connected to the rotating shaft is slidably connected to the guide rod 22, and a spring 24 is provided between the pressure head 23 and the mounting frame. The pressure head 23 seals the inner filter cartridge 17 under the elastic force of the spring 24. Only when the sludge in the inner filter cartridge 17 is dry enough to form a mud cake can the pressure head 23 be pushed open and discharged, so that the mud and water separation is more thorough.

[0039] In order to achieve the purpose of improving the remediation effect of heavy metal soil, preferably, the mud box 12 is internally rotatably connected to a stirring shaft 25 with one end passing through the side wall of the mud box 12, and a plurality of stirring paddles 26 are arranged on the stirring shaft 25. A driving pulley 27 is arranged at the output end of the first motor 8, and a driven pulley 28 is arranged at one end of the stirring shaft 25 passing through the side wall of the mud box 12. The driving pulley 27 and the driven pulley 28 are connected through a transmission belt 29.

[0040] When in use, the first motor 8 drives the active pulley 27 to rotate, the active pulley 27 drives the driven pulley 28 to rotate through the transmission belt 29, and the driven pulley 28 drives the stirring paddle 26 to rotate through the stirring shaft 25, so as to stir and mix the mud and the agent, increase the contact area between the two, accelerate the reaction rate, and thus improve the repair effect of heavy metal soil.

[0041] In order to achieve the purpose of extending the service life of the device, preferably, an arc-shaped guide groove is respectively provided at the upper end of the two side plates 2, and two annular sliders 30 adapted to the arc-shaped guide groove are provided on the circumference of the drum 3. The arc-shaped guide groove supports and guides the drum 3 through the annular sliders 30, thereby increasing the structural stability of the drum 3 and extending the service life of the device.

[0042] Compared with the prior art, the present invention is provided with the coordination of a bottom plate, a side plate, a drum, a feed port, a feed hopper, a large-particle solid phase outlet, a mud hole, an outer gear ring, a first motor, a gear, a water pump, a spray pipe, a mud box, a receiving hopper, a dosing port, a mud outlet and a mud-water separation device. When working, the water pump and the first motor are started, and the water pump transports water from an external water source to the spray pipe and sprays it out from the spray pipe. The first motor drives the gear to rotate, and the gear drives the drum to rotate through the outer gear ring, and soil is added to the drum from the feed hopper at the feed port. Due to the inclined setting of the bottom plate, the large-particle solid phase in the soil will gradually move toward the large-particle solid phase outlet and be discharged. During the movement, the soil attached to its surface is washed to form mud, and the mud passes through the mud hole and falls into the mud box under the diversion action of the receiving hopper. The agent is added to the mud box through the dosing port to transfer the heavy metals in the solid phase to the liquid phase. Finally, the mud and water are separated by the mud-water separation device, so that the soil is fully washed to avoid secondary pollution.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving and environmentally friendly heavy metal pollution prevention and control device, comprising an inclined bottom plate (1), characterized in that: Two side plates (2) are arranged on the bottom plate (1) in a relative manner, and the upper ends of the two side plates (2) are rotatably connected to rollers (3) with openings at both ends, the opening at the high end of the roller (3) is a feed port (4), and a feed hopper (10) extending into the feed port (4) is arranged on the side plate (2) on the same side as the feed port (4), and the opening at the low end of the roller (3) is a large particle solid phase outlet (5), and a mud hole (6) is opened in the portion of the roller (3) located between the two side plates (2), and an outer gear ring (7) is arranged on the circumference of the roller (3), and a first motor (8) is rotatably connected to one of the side plates (2), and a gear (9) meshing with the outer gear ring (7) is arranged at the output end of the first motor (8); It also includes a spray pipe (11) extending into the upper portion of the interior of the drum (3) and connected to an external water source via a water pump; It also comprises a mud box (12) arranged at the lower end of the drum (3), the upper end of the mud box (12) being provided with a receiving hopper (13) and a dosing port (14), the lower end of the side wall of the mud box (12) on the same side as the feed hopper (10) being provided with a mud outlet (15), and a mud-water separation device being provided at the mud outlet (15).

2. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 1 is characterized in that: The mud-water separation device comprises an outer shell (16), an inner filter cartridge (17), a second motor (18), a screw conveying shaft (19) and a water outlet pipe (20); the outer shell (16) is arranged at a mud outlet (15); the inner filter cartridge (17) in communication with the mud outlet (15) is fixedly connected to the inner shell (16) via a support rod; a mounting frame is arranged at one end of the outer shell (16) away from the mud outlet (15); the second motor (18) is arranged on the mounting frame; the output end of the second motor (18) is fixedly connected to the screw conveying shaft (19) penetrating the inner filter cartridge (17) via a rotating shaft; and the lower end of the outer shell (16) is provided with a water outlet pipe (20).

3. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 2 is characterized in that: The spiral blades on the spiral conveying shaft (19) change from sparse to dense along the conveying direction.

4. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 2 or 3, characterized in that: The diameter of the spiral conveying shaft (19) increases from small to large along the conveying direction.

5. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 4 is characterized in that: A filter cloth (21) is arranged on the inner wall of the inner filter cylinder (17).

6. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 2 or 5, characterized in that: The lower end of the outer shell (16) is a funnel-shaped structure, and the water outlet pipe (20) is arranged at the bottom end of the funnel-shaped structure.

7. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 6 is characterized by: A guide rod (22) is arranged between the outer shell (16) and the mounting frame, a pressure head (23) movably connected to the rotating shaft is slidably connected to the guide rod (22), and a spring (24) is arranged between the pressure head (23) and the mounting frame.

8. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 7 is characterized in that: The interior of the mud box (12) is rotatably connected to a stirring shaft (25) having one end extending through a side wall of the mud box (12), and a plurality of stirring paddles (26) are arranged on the stirring shaft (25).

9. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 8, characterized in that: The output end of the first motor (8) is provided with a driving pulley (27), and the end of the stirring shaft (25) passing through the side wall of the mud box (12) is provided with a driven pulley (28), and the driving pulley (27) and the driven pulley (28) are connected to each other through a transmission belt (29).

10. The energy-saving and environmentally friendly heavy metal pollution prevention and control equipment according to claim 9, characterized in that: An arc-shaped guide groove is respectively arranged at the upper end of the two side plates (2), and two annular sliding blocks (30) matching the arc-shaped guide grooves are arranged on the circumference of the roller (3).

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