A fly ash water washing device

Abstract

The utility model discloses a fly ash water washing device, including fly ash settling tank, its upper portion is equipped with the washing liquid import, its lower portion is equipped with washing liquid export, its bottom is equipped with the slagging-off mouth, washing liquid pipeline, its upper end is equipped with the overflow port of being lower than washing liquid import and fly ash import, its lower extreme is connected with washing liquid export and is higher than washing liquid export, and washing liquid pipeline spirals ascending in vertical direction. This scheme realizes the purpose of fly ash water washing dechlorination through fly ash settling tank and washing liquid pipeline, reduces device floor space and equipment cost. Washing liquid enters fly ash settling tank from washing liquid import, and discharges from washing liquid export, because the overflow port of washing liquid pipeline is lower than washing liquid import, therefore washing liquid flows through washing liquid pipeline from below to top and flows out from overflow port, reduces pump equipment, reduces equipment cost.

Description

Technical Field

[0001] This utility model relates to the field of fly ash treatment technology for waste incineration, and in particular to a fly ash washing device. Background Technology

[0002] Municipal solid waste incineration fly ash is a powdery substance collected by the flue gas purification system for municipal solid waste incineration. With the rapid annual increase in the amount of municipal solid waste incinerated, the amount of fly ash generated is also increasing, necessitating the treatment of this growing volume. Water washing is a relatively effective method for treating fly ash, not only removing chloride ions but also significantly reducing its volume. The harmless and resource-based treatment process for municipal solid waste incineration fly ash first uses water washing to dissolve soluble salts in the fly ash into water. Subsequent processes such as filtration, hardening removal, and crystallization then reduce the volume of hazardous waste and enable the resource utilization of usable substances in the fly ash. However, existing fly ash washing devices require multiple washing tanks, resulting in a large footprint and high equipment costs.

[0003] For example, Chinese Patent Publication No. CN118875008A, published on November 1, 2024, entitled "Fly Ash Washing System and Fly Ash Washing Method," includes at least two fly ash washing devices and a transfer assembly. The fly ash washing device includes a main body, which includes a washing chamber, a washing inlet, and a washing outlet. Both the washing inlet and the washing outlet are connected to the washing chamber. The washing inlet is used to receive fly ash, water, and carbon dioxide. The transfer assembly includes a transfer valve and a transfer component. The transfer valve is connected to the washing outlet. The fly ash washing system includes a series mode and a parallel mode. In the series mode, multiple washing devices are connected in series to form multiple stages. The transfer valve is in the open state, and the transfer component is used to receive the fly ash slurry discharged from the transfer valve connected to the previous stage and transport the fly ash slurry to the next stage washing chamber. In the parallel mode, the transfer valve is in the closed state, and each fly ash washing device washes the fly ash simultaneously.

[0004] The drawback of existing patents is that existing fly ash washing devices require multiple washing tanks for washing, which not only occupies a large area but also has high equipment costs. Utility Model Content

[0005] The purpose of this invention is to improve upon existing fly ash washing devices that rely on multiple washing tanks, resulting in large floor space and high equipment costs. This invention provides a fly ash washing device that reduces floor space and lowers equipment costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fly ash washing device includes: a fly ash settling tank with a washing liquid inlet at the top, a washing liquid outlet at the bottom, and a slag discharge port at the bottom; and a washing liquid pipeline with an overflow port at the top (lower than the washing liquid inlet) and a fly ash inlet, and its lower end connected to and higher than the washing liquid outlet, the washing liquid pipeline spiraling upwards vertically. This fly ash washing device achieves dechlorination of fly ash through the fly ash settling tank and washing liquid pipeline, reducing the footprint and equipment cost. The washing liquid enters the fly ash settling tank through the washing liquid inlet and exits through the washing liquid outlet. Because the overflow port of the washing liquid pipeline is lower than the washing liquid inlet, the washing liquid flows from bottom to top through the pipeline and exits through the overflow port, reducing the need for pumps and lowering equipment costs. The fly ash inlet is located at the upper end of the washing liquid pipeline. Fly ash enters the washing liquid pipeline and mixes with it. Fly ash deposits flow from top to bottom through the washing liquid pipeline, achieving counter-current water washing with the washing liquid, ensuring sufficient reaction and dechlorination. The fly ash deposits gradually settle to the bottom of the fly ash settling tank and are discharged from the slag outlet after reaching a certain sedimentation level. This technical solution reduces the number of pumps and washing tanks, utilizes the equipment's structural design to achieve counter-current water washing of fly ash, and extends the fly ash washing stroke by spiraling upwards vertically, ensuring effective dechlorination while reducing equipment footprint and costs.

[0007] Preferably, the washing liquid pipeline includes several inclined branch pipes, which are distributed vertically and connected end-to-end in sequence. These inclined branch pipes increase the fly ash washing stroke and allow fly ash deposits to settle to the bottom of the fly ash settling tank under their own gravity. The inclined branch pipes, connected end-to-end and spiraling upwards vertically, have a compact structure, a long washing stroke, thorough fly ash washing, and good dechlorination effect.

[0008] Preferably, the fly ash inlet is provided with a feeding mechanism, which includes a hopper and a discharge pipe located below the hopper, and the discharge pipe is connected to the fly ash inlet.

[0009] Preferably, the feeding pipe is equipped with a vibrating device to reduce fly ash adhesion to the inner wall of the feeding pipe.

[0010] Preferably, a feeding pipe is provided between the silo and the discharge pipe. A spiral shaft and feeding blades mounted on the spiral shaft are rotatably installed within the feeding pipe. The washing liquid outlet is connected to the inlet end of the feeding pipe via a washing liquid branch pipe. The spiral shaft is driven by a drive motor, which in turn drives the feeding blades to rotate, thus pushing the fly ash into the feed and ensuring sufficient fly ash feed volume. The washing liquid outlet is connected to the inlet end of the feeding pipe via a washing liquid branch pipe, allowing the fly ash to initially form a fly ash slurry within the feeding pipe. This prevents the fly ash from being too hydrophobic to float on the water surface and thus unable to mix with the washing liquid for washing.

[0011] Preferably, the inclined branch pipe is equipped with a metal mesh disk filled with grinding balls, and a drive mechanism is provided outside the inclined branch pipe to drive the metal mesh disk to reciprocate along the length of the inclined branch pipe. When the fly ash slurry flows through the inclined branch pipe, it passes through the metal mesh disk, causing the grinding balls inside the metal mesh disk to squeeze and agglomerate the slurry, achieving a ball milling effect. The metal mesh disk is used to hold the grinding balls and does not filter the fly ash slurry.

[0012] Preferably, the metal mesh disc has rollers on both sides, and the inner wall of the inclined branch pipe has a groove extending along the length of the inclined branch pipe. The rollers are placed in the grooves. The driving mechanism includes a permanent magnet placed on the outer wall of the inclined branch pipe and a driving assembly that drives the permanent magnet to reciprocate along the length of the inclined branch pipe. The permanent magnet attracts the rollers of the metal mesh disc. The metal mesh disc has rollers on both sides, and the inner wall of the inclined branch pipe has grooves on both sides. The metal mesh disc is slidably positioned in the grooves of the inclined branch pipe via the rollers, allowing the metal mesh disc to reciprocate along the length of the inclined branch pipe, achieving the purpose of back-and-forth grinding of the fly ash slurry, so that the fly ash and washing liquid react fully. The rollers are driven by a permanent magnet placed on the outer wall of the inclined branch pipe, and the rollers are provided with magnetic material, attracting the rollers.

[0013] Preferably, the drive assembly includes a drive motor mounted on a permanent magnet and a gear mounted on the output shaft of the drive motor. A rack extending along the length of the inclined branch pipe is provided on the outer wall of the inclined branch pipe, and the gear meshes with the rack. The gear, rotating with the drive motor, reciprocates on the rack, driving the permanent magnet to reciprocate along the length of the inclined branch pipe. The permanent magnet, drive motor, and gear are sequentially arranged on the outer wall of the inclined branch pipe. A baffle is provided on the outer wall of the inclined branch pipe, and the baffle has a sliding groove. The permanent magnet, drive motor, and gear are positioned between the baffle and the inclined branch pipe. The output shaft of the drive motor passes through the gear and extends into the sliding groove, and the baffle limits the gear. The gear is fixedly mounted on the output shaft of the drive motor.

[0014] Preferably, the outer wall of the inclined branch pipe is provided with a limiting groove extending along the length of the inclined branch pipe, and the permanent magnet is slidably disposed within the limiting groove. The limiting groove is used to limit the movement direction of the permanent magnet and to prevent the permanent magnet from deflecting or falling off.

[0015] Preferably, the outer wall of the inclined branch pipe is provided with a reciprocating lead screw extending along the length of the inclined branch pipe and a drive motor for driving the reciprocating lead screw to rotate. Both ends of the reciprocating lead screw are supported on the outer wall of the inclined branch pipe by support seats. The permanent magnet is sleeved on the reciprocating lead screw and slides in engagement with it. The reciprocating lead screw and the permanent magnet slide in engagement, and the drive motor drives the reciprocating lead screw to rotate, causing the permanent magnet to reciprocate on the reciprocating lead screw.

[0016] Preferably, the lower inner wall of the fly ash settling tank is a conical surface, wider at the top and narrower at the bottom. The slag discharge port is located at the bottom of the conical surface, and the washing liquid outlet is located above the conical surface. This facilitates the accumulation and discharge of fly ash deposits at the bottom.

[0017] Preferably, the washing liquid pipeline is equipped with a baffle plate near the overflow port, the baffle plate being located between the overflow port and the fly ash inlet. The baffle plate prevents fly ash deposits from entering the overflow port. The overflow port is equipped with an overflow weir.

[0018] Therefore, this utility model has the following beneficial effects: (1) The purpose of dechlorination of fly ash can be achieved by the fly ash settling tank and the spiraling washing liquid pipeline, which reduces the floor space and the number of pumps, washing tanks, etc., and reduces the cost of washing equipment; (2) The height difference design between the washing liquid inlet of the fly ash settling tank and the overflow port of the washing liquid pipeline makes the washing liquid overflow in reverse, reducing the number of pumps; (3) The inclined branch pipes are connected end to end and spiral upward in the vertical direction, with a compact structure, long washing stroke, sufficient fly ash washing, and good dechlorination effect; (4) The inclined branch pipes are equipped with reciprocating grinding balls to achieve the effect of fully mixing and washing fly ash and washing liquid, and can also break up the clumps of ash slurry to better wash away chloride ions in fly ash. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of one embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of a washing liquid pipeline in Embodiment 2 of this utility model.

[0021] Figure 3 This is a cross-sectional view of the washing liquid pipeline in Embodiment 2 of this utility model.

[0022] Figure 4 This is a schematic diagram of a washing liquid pipeline in Embodiment 3 of this utility model.

[0023] Figure 5 This is a cross-sectional view of the washing liquid pipeline in Embodiment 3 of this utility model.

[0024] As shown in the picture: Fly ash settling tank 1, washing liquid inlet 1.1, washing liquid outlet 1.2, slag discharge outlet 1.3, Overflow outlet 2, fly ash inlet 3, 4. Inclined branch pipe, 4.1. Slide groove 5. Feeding mechanism, 5.1 hopper, 5.2 discharge pipe, 5.3 delivery pipe. 6. Metal mesh disc; 7. Grinding ball; 8. Roller; 9. Permanent magnet; 10. Drive motor; 11. Gear; 12. Rack; 13. Baffle; 14. Reciprocating screw; 15. Support base; 16. Mudguard; 17. Outer shell; 18. Base. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Example 1, as Figure 1 The fly ash washing device shown includes: a fly ash settling tank 1, which has a washing liquid inlet 1.1 at the top, a washing liquid outlet 1.2 at the bottom, and a slag discharge port 1.3 at the bottom; a washing liquid pipeline, which has an overflow port 2 at the top that is lower than the washing liquid inlet 1.1 and a fly ash inlet 3, and its bottom end is connected to and higher than the washing liquid outlet 1.2, and the washing liquid pipeline spirals upward in the vertical direction.

[0027] The fly ash washing device described in the above embodiment achieves the purpose of dechlorination of fly ash through a fly ash settling tank 1 and a washing liquid pipeline, reducing the footprint and equipment cost. The washing liquid enters the fly ash settling tank 1 through the washing liquid inlet 1.1 and exits through the washing liquid outlet 1.2. Since the overflow port 2 of the washing liquid pipeline is lower than the washing liquid inlet 1.1, the washing liquid flows from bottom to top through the pipeline and exits through the overflow port 2, reducing the need for pumps and lowering equipment costs. The fly ash inlet 3 is located at the upper end of the washing liquid pipeline. Fly ash enters the washing liquid pipeline and mixes with the washing liquid. The fly ash sediment flows from top to bottom through the washing liquid pipeline, achieving counter-current washing with the washing liquid in the pipeline, ensuring sufficient reaction and dechlorination of the fly ash and washing liquid. The fly ash sediment gradually settles to the bottom of the fly ash settling tank 1 and is discharged from the slag outlet 1.3 after reaching a certain sedimentation level. This technical solution reduces the number of pumps and washing tanks, and utilizes the equipment's own structural design to achieve the purpose of countercurrent water washing of fly ash. Furthermore, the washing liquid pipeline spirals upward in the vertical direction, extending the fly ash water washing stroke. This ensures the dechlorination effect of fly ash water washing while reducing the equipment's footprint and lowering equipment costs.

[0028] The washing liquid pipeline was further optimized, comprising several inclined branch pipes 4, which are distributed vertically and connected end-to-end. The inclined branch pipes 4 increase the fly ash washing stroke and allow fly ash deposits to settle to the bottom of the fly ash settling tank 1 under their own gravity. The inclined branch pipes 4, connected end-to-end and spiraling upwards vertically, have a compact structure, a long washing stroke, thorough fly ash washing, and good dechlorination effect.

[0029] The fly ash inlet 3 is further optimized. The fly ash inlet 3 is equipped with a feeding mechanism 5, which includes a hopper 5.1 and a discharge pipe 5.2 located below the hopper 5.1. The discharge pipe 5.2 is connected to the fly ash inlet 3.

[0030] The feeding pipe 5.2 has been further optimized. A vibrating device is installed on the outside of the feeding pipe 5.2 to reduce fly ash adhesion to the inner wall of the feeding pipe 5.2.

[0031] The fly ash inlet 3 is further optimized. A feeding pipe 53 is provided between the silo 5.1 and the discharge pipe 5.2. A spiral shaft and feeding blades placed on the spiral shaft are rotatably installed in the feeding pipe 5.3. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe. The spiral shaft is driven by the drive motor 10, which drives the feeding blades to rotate, so that the feeding blades push the fly ash in, ensuring the fly ash feed volume. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe, so that the fly ash initially forms a fly ash slurry in the feeding pipe 5.3, avoiding the fly ash's hydrophobicity causing a large amount of fly ash to float on the water surface and fail to mix with the washing liquid for washing.

[0032] The fly ash settling tank 1 has been further optimized. The lower inner wall of the fly ash settling tank 1 is a conical surface that is larger at the top and smaller at the bottom. The slag discharge port 1.3 is located at the bottom of the conical surface, and the washing liquid outlet 1.2 is located at the top of the conical surface. This facilitates the accumulation and discharge of fly ash sediment at the bottom.

[0033] The washing liquid pipeline has been further optimized. A baffle plate 16 is installed near the overflow port 2, between the overflow port 2 and the fly ash inlet 3. The baffle plate 16 prevents fly ash deposits from entering the overflow port 2. The overflow port 2 is equipped with an overflow weir.

[0034] The washing liquid pipeline has been further optimized. The washing liquid pipeline is covered with an outer shell, and a base is set at the bottom of the outer shell to support the outer shell, which raises the washing liquid pipeline and provides protection.

[0035] Example 2, as Figure 1 , Figure 2 , Figure 3 The fly ash washing device shown includes: a fly ash settling tank 1, which has a washing liquid inlet 1.1 at the top, a washing liquid outlet 1.2 at the bottom, and a slag discharge port 1.3 at the bottom; a washing liquid pipeline, which has an overflow port 2 at the top that is lower than the washing liquid inlet 1.1 and a fly ash inlet 3, and its bottom end is connected to and higher than the washing liquid outlet 1.2, and the washing liquid pipeline spirals upward in the vertical direction.

[0036] The inclined branch pipe 4 contains a metal mesh disc 6 filled with grinding balls 7. A drive mechanism is located outside the inclined branch pipe 4 to drive the metal mesh disc 6 to reciprocate along its length. When fly ash slurry flows through the inclined branch pipe 4, the grinding balls 7 inside the metal mesh disc 6 compress and agglomerate the slurry, achieving a ball milling effect. The metal mesh disc 6 is used to hold the grinding balls 7 and does not filter the fly ash slurry.

[0037] Specifically, the metal mesh disk 6 has rollers 8 on both sides, and the inner wall of the inclined branch pipe 4 has a groove 4.1 extending along the length of the inclined branch pipe 4. The rollers 8 are placed in the groove 4.1. The driving mechanism includes a permanent magnet 9 placed on the outer wall of the inclined branch pipe 4 and a driving assembly that drives the permanent magnet 9 to reciprocate along the length of the inclined branch pipe 4. The permanent magnet 9 attracts the rollers 8 of the metal mesh disk 6. The metal mesh disk 6 has rollers 8 on both sides, and the inner wall of the inclined branch pipe 4 has grooves 4.1 on both sides. The metal mesh disk 6 is slidably set in the grooves 4.1 of the inclined branch pipe 4 by the rollers 8, so that the metal mesh disk 6 reciprocates along the length of the inclined branch pipe 4, achieving the purpose of back-and-forth grinding of the fly ash slurry, so that the fly ash and washing liquid can react fully. The rollers 8 are driven by the permanent magnet 9 placed on the outer wall of the inclined branch pipe 4. The rollers 8 are provided with magnetic material, and the permanent magnet 9 attracts the rollers 8.

[0038] In this embodiment, the drive assembly includes a drive motor 10 mounted on a permanent magnet 9 and a gear 11 mounted on the output shaft of the drive motor 10. A rack 12 extending along the length of the inclined branch pipe 4 is provided on the outer wall of the inclined branch pipe 4, and the gear 11 and rack 12 mesh. The gear 11 rotates with the drive motor 10, reciprocating on the rack 12, driving the permanent magnet 9 to reciprocate along the length of the inclined branch pipe 4. The permanent magnet 9, drive motor 10, and gear 11 are sequentially arranged on the outer wall of the inclined branch pipe 4. A baffle 13 is provided on the outer wall of the inclined branch pipe 4, and a sliding groove is provided on the baffle 13. The permanent magnet 9, drive motor 10, and gear 11 are positioned between the baffle 13 and the inclined branch pipe 4. The output shaft of the drive motor 10 passes through the gear 11 and extends into the sliding groove, and the baffle 13 limits the movement of the gear 11. The gear 11 is fixedly mounted on the output shaft of the drive motor 10.

[0039] The inclined branch pipe 4 is further optimized by providing a limiting groove on its outer wall that extends along its length. The permanent magnet 9 is slidably disposed within the limiting groove. The limiting groove is used to limit the movement direction of the permanent magnet 9 and to prevent the permanent magnet 9 from deflecting or falling off.

[0040] The washing liquid pipeline was further optimized, comprising several inclined branch pipes 4, which are distributed vertically and connected end-to-end. The inclined branch pipes 4 increase the fly ash washing stroke and allow fly ash deposits to settle to the bottom of the fly ash settling tank 1 under their own gravity. The inclined branch pipes 4, connected end-to-end and spiraling upwards vertically, have a compact structure, a long washing stroke, thorough fly ash washing, and good dechlorination effect.

[0041] The fly ash inlet 3 is further optimized. The fly ash inlet 3 is equipped with a feeding mechanism 5, which includes a hopper 5.1 and a discharge pipe 5.2 located below the hopper 5.1. The discharge pipe 5.2 is connected to the fly ash inlet 3.

[0042] The feeding pipe 5.2 has been further optimized. A vibrating device is installed on the outside of the feeding pipe 5.2 to reduce fly ash adhesion to the inner wall of the feeding pipe 5.2.

[0043] The fly ash inlet 3 is further optimized. A feeding pipe 53 is provided between the silo 5.1 and the discharge pipe 5.2. A spiral shaft and feeding blades placed on the spiral shaft are rotatably installed in the feeding pipe 5.3. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe. The spiral shaft is driven by the drive motor 10, which drives the feeding blades to rotate, so that the feeding blades push the fly ash in, ensuring the fly ash feed volume. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe, so that the fly ash initially forms a fly ash slurry in the feeding pipe 5.3, avoiding the fly ash's hydrophobicity causing a large amount of fly ash to float on the water surface and fail to mix with the washing liquid for washing.

[0044] The fly ash settling tank 1 has been further optimized. The lower inner wall of the fly ash settling tank 1 is a conical surface that is larger at the top and smaller at the bottom. The slag discharge port 1.3 is located at the bottom of the conical surface, and the washing liquid outlet 1.2 is located at the top of the conical surface. This facilitates the accumulation and discharge of fly ash sediment at the bottom.

[0045] The washing liquid pipeline has been further optimized. A baffle plate 16 is installed near the overflow port 2, between the overflow port 2 and the fly ash inlet 3. The baffle plate 16 prevents fly ash deposits from entering the overflow port 2. The overflow port 2 is equipped with an overflow weir.

[0046] Example 3, as Figure 1 , Figure 4 , Figure 5 The fly ash washing device shown includes: a fly ash settling tank 1, which has a washing liquid inlet 1.1 at the top, a washing liquid outlet 1.2 at the bottom, and a slag discharge port 1.3 at the bottom; a washing liquid pipeline, which has an overflow port 2 at the top that is lower than the washing liquid inlet 1.1 and a fly ash inlet 3, and its bottom end is connected to and higher than the washing liquid outlet 1.2, and the washing liquid pipeline spirals upward in the vertical direction.

[0047] The inclined branch pipe 4 contains a metal mesh disc 6 filled with grinding balls 7. A drive mechanism is located outside the inclined branch pipe 4 to drive the metal mesh disc 6 to reciprocate along its length. When fly ash slurry flows through the inclined branch pipe 4, the grinding balls 7 inside the metal mesh disc 6 compress and agglomerate the slurry, achieving a ball milling effect. The metal mesh disc 6 is used to hold the grinding balls 7 and does not filter the fly ash slurry.

[0048] Specifically, the metal mesh disk 6 has rollers 8 on both sides, and the inner wall of the inclined branch pipe 4 has a groove 4.1 extending along the length of the inclined branch pipe 4. The rollers 8 are placed in the groove 4.1. The driving mechanism includes a permanent magnet 9 placed on the outer wall of the inclined branch pipe 4 and a driving assembly that drives the permanent magnet 9 to reciprocate along the length of the inclined branch pipe 4. The permanent magnet 9 attracts the rollers 8 of the metal mesh disk 6. The metal mesh disk 6 has rollers 8 on both sides, and the inner wall of the inclined branch pipe 4 has grooves 4.1 on both sides. The metal mesh disk 6 is slidably set in the grooves 4.1 of the inclined branch pipe 4 by the rollers 8, so that the metal mesh disk 6 reciprocates along the length of the inclined branch pipe 4, achieving the purpose of back-and-forth grinding of the fly ash slurry, so that the fly ash and washing liquid can react fully. The rollers 8 are driven by the permanent magnet 9 placed on the outer wall of the inclined branch pipe 4. The rollers 8 are provided with magnetic material, and the permanent magnet 9 attracts the rollers 8.

[0049] In this embodiment, a reciprocating lead screw 14 extending along the length of the inclined branch pipe 4 and a drive motor 10 driving the reciprocating lead screw 14 to rotate are provided on the outer wall of the inclined branch pipe 4. The two ends of the reciprocating lead screw 14 are supported on the outer wall of the inclined branch pipe 4 by support seats 15. The permanent magnet 9 is sleeved on the reciprocating lead screw 14 and slides in engagement with the reciprocating lead screw 14. The reciprocating lead screw 14 and the permanent magnet 9 slide in engagement with each other, and the drive motor 10 drives the reciprocating lead screw 14 to rotate, so that the permanent magnet 9 reciprocates on the reciprocating lead screw 14.

[0050] The washing liquid pipeline was further optimized, comprising several inclined branch pipes 4, which are distributed vertically and connected end-to-end. The inclined branch pipes 4 increase the fly ash washing stroke and allow fly ash deposits to settle to the bottom of the fly ash settling tank 1 under their own gravity. The inclined branch pipes 4, connected end-to-end and spiraling upwards vertically, have a compact structure, a long washing stroke, thorough fly ash washing, and good dechlorination effect.

[0051] The fly ash inlet 3 is further optimized. The fly ash inlet 3 is equipped with a feeding mechanism 5, which includes a hopper 5.1 and a discharge pipe 5.2 located below the hopper 5.1. The discharge pipe 5.2 is connected to the fly ash inlet 3.

[0052] The feeding pipe 5.2 has been further optimized. A vibrating device is installed on the outside of the feeding pipe 5.2 to reduce fly ash adhesion to the inner wall of the feeding pipe 5.2.

[0053] The fly ash inlet 3 is further optimized. A feeding pipe 53 is provided between the silo 5.1 and the discharge pipe 5.2. A spiral shaft and feeding blades placed on the spiral shaft are rotatably installed in the feeding pipe 5.3. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe. The spiral shaft is driven by the drive motor 10, which drives the feeding blades to rotate, so that the feeding blades push the fly ash in, ensuring the fly ash feed volume. The washing liquid outlet 1.2 is connected to the inlet end of the feeding pipe 5.3 through a washing liquid branch pipe, so that the fly ash initially forms a fly ash slurry in the feeding pipe 5.3, avoiding the fly ash's hydrophobicity causing a large amount of fly ash to float on the water surface and fail to mix with the washing liquid for washing.

[0054] The fly ash settling tank 1 has been further optimized. The lower inner wall of the fly ash settling tank 1 is a conical surface that is larger at the top and smaller at the bottom. The slag discharge port 1.3 is located at the bottom of the conical surface, and the washing liquid outlet 1.2 is located at the top of the conical surface. This facilitates the accumulation and discharge of fly ash sediment at the bottom.

[0055] The washing liquid pipeline has been further optimized. A baffle plate 16 is installed near the overflow port 2, between the overflow port 2 and the fly ash inlet 3. The baffle plate 16 prevents fly ash deposits from entering the overflow port 2. The overflow port 2 is equipped with an overflow weir.

[0056] The specific embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the specific scope of implementation of this utility model. All equivalent changes made to the shape and structure of this utility model should be included within the protection scope of this utility model.

Claims

1. A fly ash washing device, characterized in that it comprises: The fly ash settling tank has a washing liquid inlet at the top, a washing liquid outlet at the bottom, and a slag discharge port at the bottom. The washing liquid pipeline has an overflow port and a fly ash inlet at its upper end that are lower than the washing liquid inlet, and its lower end is connected to and higher than the washing liquid outlet. The washing liquid pipeline spirals upward in the vertical direction.

2. The fly ash washing device according to claim 1, characterized in that, The washing liquid pipeline includes several oblique branch pipes, which are distributed vertically and connected end to end in sequence.

3. The fly ash washing device according to claim 2, characterized in that, The fly ash inlet is equipped with a feeding mechanism, which includes a hopper and a discharge pipe located below the hopper. The discharge pipe is connected to the fly ash inlet.

4. The fly ash washing device according to claim 3, characterized in that, A feeding pipe is provided between the hopper and the discharge pipe. A spiral shaft and feeding blades placed on the spiral shaft are rotatably installed inside the feeding pipe. The washing liquid outlet is connected to the inlet end of the feeding pipe through a washing liquid branch pipe.

5. A fly ash washing device according to claim 2, 3, or 4, characterized in that, The inclined branch pipe is equipped with a metal mesh disk, which is filled with grinding balls. The inclined branch pipe is equipped with a driving mechanism that drives the metal mesh disk to reciprocate along the length of the inclined branch pipe.

6. The fly ash washing device according to claim 5, characterized in that, The metal mesh is provided with rollers on both sides, and the inner wall of the inclined branch pipe is provided with a sliding groove extending along the length of the inclined branch pipe. The rollers are placed in the sliding groove. The driving mechanism includes a permanent magnet placed on the outer wall of the inclined branch pipe and a driving component that drives the permanent magnet to reciprocate along the length of the inclined branch pipe. The permanent magnet attracts the rollers of the metal mesh.

7. A fly ash washing device according to claim 6, characterized in that, The drive assembly includes a drive motor placed on a permanent magnet and a gear placed on the output shaft of the drive motor. A rack extending along the length of the inclined branch pipe is provided on the outer wall of the inclined branch pipe, and the gear and the rack mesh.

8. A fly ash washing device according to claim 6, characterized in that, The outer wall of the inclined branch pipe is provided with a reciprocating screw extending along the length of the inclined branch pipe and a drive motor for driving the reciprocating screw to rotate. The two ends of the reciprocating screw are supported on the outer wall of the inclined branch pipe by support seats. The permanent magnet is sleeved on the reciprocating screw and slides in cooperation with the reciprocating screw.

9. A fly ash washing device according to claim 1, 2, 3, or 4, characterized in that, The lower inner wall of the fly ash settling tank is a conical surface that is larger at the top and smaller at the bottom. The slag discharge port is located at the bottom of the conical surface, and the washing liquid outlet is located above the conical surface.

10. A fly ash washing device according to claim 1, 2, 3, or 4, characterized in that, The washing liquid pipeline is equipped with a mudguard near the overflow port, and the mudguard is located between the overflow port and the fly ash inlet.

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