Fly ash water washing apparatus

Abstract

The present application relates to solid waste treatment technical field, specifically to a kind of fly ash washing equipment, including water washing tank, top of water washing tank is fixedly sealed and installed with top cover, bottom of water washing tank is fixedly sealed and installed with bottom cover;The position of the side wall of water washing tank is close to top cover Fixedly sealed and connected with first conveying pipe and second conveying pipe;The inside of water washing tank is sealed and slidably connected with piston device, and internal filter assembly and internal stirring assembly are arranged on piston device;Lifting drive device and function switching device are installed between top cover and bottom cover in the inside of water washing tank and are drivingly connected with piston device;Discharge device is provided on bottom cover, and external filter device is connected between first conveying pipe and discharge device;Water mixing feeding device and wastewater discharge device are connected in parallel on second conveying pipe.The present application overcomes the defects of the prior art, such as dispersed functions, complex operation, poor environmental protection and low filtration efficiency, and meets the actual needs of efficient and environmentally friendly fly ash treatment.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, specifically to a fly ash washing device. Background Technology

[0002] In the field of fly ash treatment, water washing has become a commonly used method because it can effectively remove soluble salts, heavy metals and other impurities from fly ash. As a byproduct of waste incineration, coal-fired power generation and other processes, fly ash can easily release pollutants into the environment through dust and leakage if not properly treated, causing soil and water pollution. Therefore, efficient water washing is of great significance for environmental protection.

[0003] Currently, traditional fly ash washing equipment relies heavily on independent units for functions such as feeding, mixing, filtering, and waste discharge. This results in dispersed equipment layouts, large floor space requirements, and manual intervention in each stage, leading to low efficiency and high operational complexity. For example, fly ash often needs to be transported to a mixing unit for mixing before being pumped to the filtration unit. This not only increases labor costs but also reduces processing efficiency due to material loss during transport. Furthermore, traditional equipment lacks a flexible function switching mechanism, preventing efficient coordination between mixing and filtration operations. This further restricts processing effectiveness and adaptability. Insufficient mixing leads to uneven removal of fly ash impurities, and poor compatibility between the filtration unit and the mixing unit easily causes pipeline blockage, requiring frequent shutdowns for cleaning.

[0004] Therefore, how to achieve functional integration, automated operation, and environmentally friendly operation of fly ash washing, while simplifying equipment structure and improving operational stability, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In order to overcome the shortcomings of existing fly ash washing equipment, such as dispersed functions, complex operation, poor environmental performance and low filtration efficiency, and to meet the actual needs of efficient and environmentally friendly fly ash treatment, this application provides a fly ash washing equipment.

[0006] The fly ash washing equipment provided in this application adopts the following technical solution:

[0007] A fly ash washing device includes a washing tank. A top cover is fixedly and sealed to the top of the washing tank, and a bottom cover is fixedly and sealed to the bottom of the washing tank. A first conveying pipe and a second conveying pipe are fixedly and sealed to the side wall of the washing tank near the top cover. A piston device is slidably and sealed inside the washing tank, and the piston device is equipped with an internal filter assembly and an internal stirring assembly. A lifting drive device and a function switching device, which are pulsatically connected to the piston device, are installed between the top cover and the bottom cover inside the washing tank. A discharge device is provided on the bottom cover, and an external filter device is connected between the first conveying pipe and the discharge device. A three-way pipe is connected to the second conveying pipe, and the other two ends of the three-way pipe are respectively connected to a mixing water feeding device and a wastewater discharge device.

[0008] By adopting the above technical solution, the washing tank, piston device, lifting drive device, function switching device, and various auxiliary devices such as feeding, filtering, discharging, and waste discharge are integrated into one unit, forming an integrated "feeding-washing-filtration-waste discharge-discharging" operation system. The sealing design of the washing tank and the cover, and the sealing sliding of the piston device, can prevent material leakage; the corresponding connection of each conveying pipe and functional device ensures that the material flows along the preset path, providing a stable structural foundation for the entire fly ash washing process.

[0009] Furthermore, the piston device includes a piston body, a central disk rotatably connected inside the piston body, a first through hole on the piston body, a first mounting hole and a second mounting hole corresponding to the first through hole on the central disk, an internal filter assembly disposed inside the first mounting hole, and an internal stirring assembly disposed inside the second mounting hole; the lifting drive device drives the piston body to move up and down inside the washing tank, and the function switching device drives the central disk to rotate so that the first mounting hole or the second mounting hole is aligned with or offset from the first through hole.

[0010] By adopting the above technical solution, the integration and rapid switching of the "stirring-filtration" function can be achieved: rotating the central disk can align the first mounting hole, the second mounting hole and the first through hole, and the operation mode can be switched without additional disassembly of components; the piston body and the lifting drive device work together to achieve lifting, which can provide material disturbance power for stirring and extrusion pressure for filtration, simplifying the equipment structure while improving operation efficiency.

[0011] Furthermore, the internal filtration assembly includes a filter element mounting cylinder fixedly installed inside the first mounting hole. A first filter element is fixedly installed inside the filter element mounting cylinder. Both ends of the filter element mounting cylinder are fixedly and sealed with end caps. Each end cap is provided with a plurality of evenly distributed first filter holes.

[0012] By adopting the above technical solution, an internal filtration structure of "dispersed feeding - centralized filtration" is constructed: the first filter hole of the end cap can evenly disperse the fly ash mixture, avoiding local pressure concentration that could cause filter element blockage; the filter element mounting cylinder provides fixed protection for the first filter element, ensuring the stability of the filter element position during the filtration process and improving the uniformity and reliability of filtration.

[0013] Furthermore, the internal stirring assembly includes a guide cylinder rotatably connected inside the second mounting hole. The guide cylinder has an axially arranged central guide hole at its center, and a plurality of spiral guide holes arranged in a centrally symmetrical manner are formed on the outer side of the central guide hole. A central column is movably installed inside the central guide hole, and a plurality of spiral guide grooves arranged in a centrally symmetrical manner are formed on the central column. The spiral guide holes and the spiral guide grooves rotate in opposite directions.

[0014] By adopting the above technical solution, using spiral guide holes and spiral guide grooves with opposite rotation directions, a counter-current vortex is formed when the piston rises and falls: no additional power is needed to drive the stirring components, and efficient stirring can be achieved solely through material flow, expanding the stirring range, avoiding fly ash deposition and agglomeration, improving the mixing uniformity of fly ash with water and reagents, and enhancing the water washing and impurity removal effect.

[0015] Furthermore, the lifting drive device includes a threaded shaft rotatably connected between the top cover and the bottom cover, a threaded hole is provided on the piston body corresponding to the threaded shaft, the threaded shaft is threadedly connected to the piston body through the threaded hole, a first driven gear is fixedly installed on the top of the threaded shaft, and a first drive assembly for driving the first driven gear to rotate is provided inside the top cover.

[0016] By adopting the above technical solution, the motor power is converted into the rotational motion of the threaded shaft through gear transmission, and then into the linear lifting motion of the piston body through thread transmission. The gear transmission ensures stable power transmission, while the thread transmission enables precise control of piston lifting and lowering. The lifting speed and stroke can be flexibly adjusted to meet the needs of different working conditions such as negative pressure feeding, reciprocating agitation and stirring, and positive pressure waste discharge.

[0017] Furthermore, the function switching device includes a spline shaft rotatably connected between the top cover and the bottom cover. A spline hole is opened at the center of the central disk corresponding to the spline shaft. A second through hole is opened on the piston body corresponding to the spline shaft. The spline shaft passes through the second through hole and is slidably connected to the central disk through the spline hole. A second driven gear is fixedly installed on the top of the spline shaft. A second drive assembly for driving the second driven gear to rotate is provided inside the top cover.

[0018] By adopting the above technical solution, the spline connection can transmit torque and slide axially, enabling the spline shaft to drive the central disk to rotate and switch functions without affecting the lifting and lowering of the piston body. The gear transmission ensures the precise rotation angle of the central disk, and the spline connection avoids interference between lifting and switching actions, ensuring the smoothness and accuracy of the "stirring and filtering" switching.

[0019] Furthermore, the discharge device includes a discharge cover rotatably connected to the bottom cover, an external filter device disposed on the discharge cover, a plurality of ring-shaped pull rods hinged to the outer side of the discharge cover, a locking nut threaded onto the pull rods, a retainer fixedly connected to the outer side of the bottom cover corresponding to the pull rods, and a sealing gasket fixedly installed on the end face of the bottom cover.

[0020] By adopting the above technical solution, the discharge cover is sealed and locked with "pull rod, locking nut, and clamp", and the sealing gasket is used to improve the sealing reliability and prevent material leakage during operation. The discharge cover is integrated with the external filter device, so that the auxiliary filtration is completed simultaneously during the discharge process, simplifying the process. The manual opening and closing structure is easy to operate and facilitates the later equipment maintenance and filter element replacement.

[0021] Furthermore, the external filtration device includes a first connecting pipe, which is sealed and fixedly connected to the first conveying pipe. A first electrically controlled valve is fixedly installed on the first connecting pipe, and a flexible hose is fixedly connected to the end of the first connecting pipe away from the first conveying pipe. A filter chamber is opened inside the discharge cover, and a second filter hole communicating with the filter chamber is opened at the inner end of the discharge cover. A second filter element is fixedly installed inside the filter chamber, and a second connecting pipe communicating with the filter chamber is fixedly and sealedly connected to the outer end of the discharge cover. The flexible hose is sealed and connected to the second connecting pipe.

[0022] By adopting the above technical solutions, an external filtration system that works in conjunction with the internal filtration is constructed: the first electronically controlled valve precisely controls the start and stop of filtration, the second filter element traps fine particles that are not separated by the internal filtration, and improves the purity of solid-liquid separation; the flexible connection of the hose adapts to the opening and closing of the discharge cover, avoids damage from pulling on the rigid tube, and ensures that filtration and discharge actions do not interfere with each other.

[0023] Furthermore, the mixing and feeding device includes a mixing tank, a feed pipe is fixedly and sealed to the bottom of the mixing tank, a second electrically controlled valve is fixedly installed on the feed pipe, and the feed pipe is fixedly and sealed to the three-way pipe; a feed hopper is fixedly and sealed to the top of the mixing tank, and a water inlet pipe is fixedly and sealed to the outer side of the mixing tank near its top, a third electrically controlled valve is fixedly installed on the water inlet pipe, and the water inlet pipe is connected to an external water supply device.

[0024] By adopting the above technical solution, the fly ash, reagents and water are premixed in the mixing tank in advance: the electric control valve accurately controls the water and feed volume to ensure that the concentration of the fly ash mixture is suitable for the washing requirements; the sealed structure avoids fly ash dust during feeding and mixing, improves the environmental friendliness of the feed, and at the same time prevents unmixed fly ash from directly entering the washing tank and affecting the washing effect.

[0025] Furthermore, the wastewater discharge device includes a wastewater collection tank, a wastewater collection pipe fixedly connected to the top of the wastewater collection tank, a fourth electrically controlled valve fixedly installed on the wastewater collection pipe, and the wastewater collection pipe fixedly and sealed to the tee pipe; a drain pipe fixedly connected to the bottom of the wastewater collection tank, a fifth electrically controlled valve fixedly installed on the drain pipe, and the drain pipe connected to an external centralized wastewater treatment system.

[0026] By adopting the above technical solutions, the temporary storage and centralized discharge of wastewater can be achieved: the wastewater collection tank buffers the difference between the amount of wastewater generated and the load of the treatment system, and the electric control valve controls the discharge rhythm to avoid direct discharge of wastewater and pollution of the environment; the connection with the T-shaped pipe simplifies the pipeline layout, ensures that wastewater discharge does not interfere with feeding and washing operations, and improves the environmental performance of the equipment.

[0027] Beneficial effects achieved:

[0028] 1. This application integrates the functions of feeding, mixing, filtering, waste discharge, and material discharge into the washing tank and surrounding components, abandoning the traditional multi-device dispersed layout mode, realizing the functional integration of the entire fly ash washing process, greatly reducing the equipment footprint, and avoiding material loss and manual intervention during cross-device transfer, thereby improving the continuity of operation and reducing labor costs.

[0029] 2. This application achieves automated control of piston lifting and switching between "stirring" and "filtration" functions by using the threaded transmission of the lifting drive device and the spline cooperation of the function switching device. There is no need to manually adjust the piston stroke or replace the working components. The stirring intensity, filtration pressure and function switching timing can be precisely controlled by the drive motor alone, thereby reducing human error and improving work efficiency, and adapting to the needs of large-scale fly ash treatment.

[0030] 3. This application blocks the path of fly ash and wastewater leakage from the source by fixing and sealing the washing tank and the cover, designing the sealing ring of the piston device, sealing the connection of each pipeline, and sealing the feeding structure of the mixing water feeding device; at the same time, the wastewater is temporarily stored in the collection tank and then connected to an external centralized treatment system, realizing the environmental protection of the entire operation, and achieving the effect of avoiding environmental pollution and protecting the health of operators.

[0031] 4. This application constructs a synchronous filtration system through the coordinated operation of internal filtration components and external filtration devices. Compared with traditional single-stage filtration, it significantly improves the solid-liquid separation efficiency and achieves the effect of meeting the standards for high-purity fly ash resource utilization.

[0032] 5. This application simplifies the overall structure of the equipment by integrating the stirring and filtering components with the piston device and the external filtering device with the discharge cover; at the same time, the pull rod locking discharge cover and the easily replaceable filter element design reduce the difficulty of disassembling the equipment, thereby reducing maintenance steps, shortening downtime for maintenance and reducing maintenance costs.

[0033] 6. This application uses an electronically controlled valve to precisely regulate the water inlet, feed, and wastewater discharge. Combined with the adjustability of the piston lifting speed, it can adapt to fly ash raw materials with different moisture contents and impurity contents. It can handle both low-concentration fly ash mixtures and high-concentration materials that are prone to agglomeration, thereby improving the equipment's adaptability to different working conditions.

[0034] 7. This application utilizes the design of the spiral guide hole and spiral guide groove in the internal stirring assembly with opposite rotation directions. This eliminates the need for an additional stirring motor. The material flow generated by the piston lifting and lowering can form a counter-current, achieving efficient stirring. At the same time, the rigid structure of the threaded drive and gear drive ensures stable power transmission and precise piston lifting and lowering, thereby reducing equipment energy consumption, improving operational stability, and extending the service life of core components. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application.

[0036] Figure 2 This is a structural exploded view of one embodiment of this application.

[0037] Figure 3 This is a schematic diagram of the internal structure of one embodiment of this application.

[0038] Figure 4 This is a schematic diagram of the internal structure of the mixing feed device and the wastewater discharge device in one embodiment of this application.

[0039] Figure 5 This is an exploded view of the piston device in one embodiment of this application.

[0040] Figure 6 This is an exploded view of the installation structure of the internal filter assembly and the internal stirring assembly in one embodiment of this application.

[0041] Figure 7 This is an exploded view of the installation structure of the lifting drive device and the function switching device in one embodiment of this application.

[0042] Figure 8 This is a schematic diagram of the overall structure of the wastewater discharge device in one embodiment of this application.

[0043] Explanation of reference numerals in the attached drawings: 100, washing tank; 101, frame; 102, top cover; 103, bottom cover; 104, first conveying pipe; 105, second conveying pipe; 106, tee pipe; 200, piston assembly; 201, piston body; 202, mounting cavity; 203, central disc; 204, first through hole; 205, first mounting hole; 206, second mounting hole; 207, internal filter assembly; 2071, filter element mounting cylinder; 2072, first filter element; 2073, end cap; 2074. First filter hole; 208. Internal stirring assembly; 2081. Guide cylinder; 2082. Central guide hole; 2083. Spiral guide hole; 2084. Central column; 2085. Spiral guide groove; 209. Sealing groove; 210. Sealing ring; 211. Cover plate; 300. Lifting drive device; 301. Threaded shaft; 302. Threaded hole; 303. First driven gear; 304. First drive assembly; 3041. First drive motor; 3042. First driving gear Gear; 3043, Center gear; 400, Function switching device; 401, Splined shaft; 402, Splined hole; 403, Second through hole; 404, Second driven gear; 405, Second drive assembly; 4051, Second drive motor; 4052, Second drive gear; 500, Discharge device; 501, Discharge cover; 502, Pull rod; 503, Locking nut; 504, Card holder; 600, External filter device; 601, First connecting pipe; 602, First electric control valve; 603. Hose; 604. Filter chamber; 605. Second filter hole; 606. Second filter element; 607. Second connecting pipe; 700. Mixing water feeding device; 701. Mixing tank; 702. Feed pipe; 703. Second solenoid valve; 704. Feed hopper; 705. Water inlet pipe; 706. Third solenoid valve; 800. Wastewater discharge device; 801. Wastewater collection tank; 802. Wastewater collection pipe; 803. Fourth solenoid valve; 804. Drain pipe; 805. Fifth solenoid valve. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0045] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] This application discloses a fly ash washing device.

[0048] Please refer to the above as well. Figures 1 to 8 In one embodiment of this application, a fly ash washing device includes a washing tank 100, which is fixedly mounted on a frame 101. A top cover 102 is fixedly and sealed to the top of the washing tank 100, and a bottom cover 103 is fixedly and sealed to the bottom of the washing tank 100. A first conveying pipe 104 and a second conveying pipe 105 are fixedly and sealed to the side wall of the washing tank 100 near the top cover 102. A piston device 200 is slidably and sealed to the inside of the washing tank 100, and an internal filter assembly is provided on the piston device 200. The washing tank 100 includes a top cover 102 and a bottom cover 103, which are located inside the tank and are connected to the piston device 200. A lifting drive device 300 and a function switching device 400 are installed between the top cover 102 and the bottom cover 103. A discharge device 500 is provided on the bottom cover 103. An external filter device 600 is connected between the first conveying pipe 104 and the discharge device 500. A three-way pipe 106 is connected to the second conveying pipe 105. The other two ends of the three-way pipe 106 are respectively connected to a water mixing feed device 700 and a wastewater discharge device 800.

[0049] During operation, the equipment first controls the lifting drive device 300 to drive the piston device 200 to slide downwards in the water washing tank 100. As the piston device 200 moves downwards, a negative pressure is formed above the piston device 200. This negative pressure is used to draw the mixture of fly ash, chemicals and water in the mixing feed device 700 into the water washing tank 100 through the three-way pipe 106 and the second conveying pipe 105.

[0050] Subsequently, the lifting drive device 300 drives the piston device 200 to slide up and down in a sealed manner within the washing tank 100. First, the function switching device 400 switches to the stirring mode to activate the internal stirring component 208. The internal stirring component 208 inside the piston device 200 stirs the fly ash mixture to achieve thorough mixing and washing. Then, the function switching device 400 switches to the filtration mode to activate the internal filtration component 207. The internal filtration component 207 inside the piston device 200 filters the fly ash mixture to separate solid particles.

[0051] While the internal filter assembly 207 is working, the external filter device 600 is activated to work in conjunction with the internal filter assembly 207 to improve the efficiency and effectiveness of filtering the fly ash mixture.

[0052] After washing and filtration, the system is first switched to sealed mode by the function switching device 400, and then the lifting drive device 300 is controlled to drive the piston device 200 to slide upwards and seal within the washing tank 100. During the upward movement of the piston device 200, a positive pressure is formed above the piston device 200. This positive pressure is used to transport the wastewater inside the washing tank 100 to the wastewater discharge device 800 through the second conveying pipe 105 and the three-way pipe 106. The material after the wastewater is separated in the washing tank 100 is discharged through the discharge device 500 on the bottom cover 103.

[0053] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the piston device 200 includes a piston body 201. An installation cavity 202 is formed inside the piston body 201. A central disk 203 is rotatably connected to the installation cavity 202. The piston body 201 has several centrally symmetrically distributed first through holes 204 penetrating the installation cavity 202. The central disk 203 has centrally symmetrically distributed first mounting holes 205 and second mounting holes 206 corresponding to the first through holes 204. An internal filter assembly 207 is disposed inside the first mounting hole 205. An internal stirring assembly... 208 is set inside the second mounting hole 206; the lifting drive device 300 drives the piston body 201 to move up and down inside the washing tank 100; the function switching device 400 drives the center plate 203 to rotate so that the first mounting hole 205 or the second mounting hole 206 is aligned with or offset from the first through hole 204; a sealing groove 209 is provided on the outer side of the piston body 201, and a sealing ring 210 is fixedly and sealed inside the sealing groove 209; a cover plate 211 is fixedly installed at the lower end of the piston body 201 corresponding to the center plate 203, and the first through hole 204 passes through the cover plate 211.

[0054] During operation, the piston device 200 achieves the separation of the tank space by the sealing sliding between the piston body 201 and the inner wall of the washing tank 100. The sealing ring 210 is embedded in the sealing groove 209 to ensure the sealing performance when the piston body 201 rises and falls, and to prevent material leakage.

[0055] When stirring is required, the function switching device 400 drives the central disk 203 to rotate, so that the second mounting hole 206 on the central disk 203 is aligned with the first through hole 204 of the piston body 201. At this time, the internal stirring component 208 is exposed to the material in the tank through the aligned hole. The lifting drive device 300 drives the piston body 201 to rise and fall. During the rising and falling process, the internal stirring component 208 uses the pressure and volume changes at both ends of the piston body 201 to stir the fly ash mixture, so as to achieve thorough washing.

[0056] When filtration is required, the function switching device 400 drives the central disk 203 to rotate again, aligning the first mounting hole 205 with the first through hole 204. The internal filter assembly 207 contacts the material through the hole. The piston body 201 descends under the action of the lifting drive device 300, squeezing the material in the tank. The liquid in the fly ash mixture is filtered through the internal filter assembly 207 and enters the space above the piston body 201, while solid particles are trapped. The cover plate 211 provides bottom support for the central disk 203 and ensures the unobstructed flow of the first through hole 204, guaranteeing the material flow path during stirring or filtration.

[0057] When the first mounting hole 205 and the second mounting hole 206 are both offset from the first through hole 204, the piston device 200 is in a sealed mode, which can isolate the material flow in the upper and lower chambers of the washing tank 100, and facilitate positive pressure waste discharge or negative pressure feeding.

[0058] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the internal filter assembly 207 includes a filter element mounting cylinder 2071 fixedly installed inside the first mounting hole 205. A first filter element 2072 is fixedly installed inside the filter element mounting cylinder 2071. Both ends of the filter element mounting cylinder 2071 are fixedly and sealed with end caps 2073. A plurality of evenly distributed first filter holes 2074 are opened on the end caps 2073.

[0059] During operation, when the function switching device 400 drives the central disk 203 to rotate until the first mounting hole 205 aligns with the first through hole 204 of the piston body 201, the internal filter assembly 207 contacts the material inside the tank through the holes. At this time, the piston body 201, driven by the lifting drive device 300, squeezes the material downwards. Under pressure, the fly ash mixture enters the filter element mounting cylinder 2071 through the first filter hole 2074 on the end cap 2073, and is then filtered by the first filter element 2072. The liquid passes through the filter material of the first filter element 2072 into the space above the piston body 201, while the solid particles in the fly ash are intercepted by the first filter element 2072, achieving solid-liquid separation. The end caps 2073 at both ends not only form a fixed seal for the first filter element 2072, but also evenly disperse the material through the densely distributed first filter holes 2074, avoiding excessive local pressure that could lead to a decrease in filtration efficiency.

[0060] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the internal stirring assembly 208 includes a guide cylinder 2081 rotatably connected inside the second mounting hole 206. The guide cylinder 2081 has an axially arranged central guide hole 2082 at its center. A plurality of spiral guide holes 2083 arranged in a centrally symmetrical manner are provided on the outer side of the central guide hole 2082. A central column 2084 is movably installed inside the central guide hole 2082. A plurality of spiral guide grooves 2085 arranged in a centrally symmetrical manner are provided on the central column 2084. The spiral guide holes 2083 and the spiral guide grooves 2085 rotate in opposite directions.

[0061] During operation, when the function switching device 400 drives the central disk 203 to rotate until the second mounting hole 206 aligns with the first through hole 204 of the piston body 201, the internal stirring assembly 208 is exposed to the mixture inside the tank. At this time, as the piston body 201 rises and falls under the drive of the lifting drive device 300, the material inside the tank enters the guide cylinder 2081 through the first through hole 204: part of the material flows along the central guide hole 2082 and contacts the spiral guide groove 2085 on the surface of the central column 2084, forming a spiral rising or falling vortex; another part of the material flows through the spiral guide hole 2083. Because the spiral guide hole 2083 and the spiral guide groove 2085 rotate in opposite directions, the two vortices form opposing stirring inside and outside the guide cylinder 2081. At the same time, the rising and falling action of the piston body 201 further drives the guide cylinder 2081 to move up and down, expanding the stirring range, so that the fly ash and water are fully mixed and collided under the action of complex vortices, achieving efficient washing.

[0062] Please refer to the above as well. Figures 1 to 8In one specific embodiment of this application, the lifting drive device 300 includes a threaded shaft 301 rotatably connected between the top cover 102 and the bottom cover 103. A threaded hole 302 is provided on the piston body 201 corresponding to the threaded shaft 301. The threaded shaft 301 is threadedly connected to the piston body 201 through the threaded hole 302. A first driven gear 303 is fixedly installed on the top of the threaded shaft 301. A first drive assembly 304 for driving the first driven gear 303 to rotate is provided inside the top cover 102.

[0063] During operation, when the piston body 201 needs to be raised or lowered, the first drive assembly 304 inside the top cover 102 is activated, driving the first driven gear 303 meshing with it to rotate, which in turn drives the threaded shaft 301, which is fixedly connected to the first driven gear 303, to rotate synchronously. Since the threaded shaft 301 forms a threaded transmission connection with the piston body 201 through the threaded hole 302, the rotational motion of the threaded shaft 301 is converted into the linear raising and lowering motion of the piston body 201 along the axial direction of the washing tank 100. By controlling the output direction and running speed of the first drive assembly 304, the piston body 201 can be raised or lowered, and the pressure inside the tank can be adjusted, thereby controlling the speed of the stirring and filtering operations.

[0064] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the first drive assembly 304 includes a first drive motor 3041, which is fixedly mounted on the upper part of the top cover 102. A first drive gear 3042 is fixedly mounted on the first drive motor 3041. The first drive gear 3042 meshes with a center gear 3043, which meshes with a first driven gear 303.

[0065] During operation, when the piston body 201 needs to be raised or lowered, the first drive motor 3041 starts, and its output shaft drives the first driving gear 3042 to rotate. Since the first driving gear 3042 meshes with the central gear 3043, power is transmitted to the central gear 3043 through gear transmission, causing the central gear 3043 to rotate synchronously. The central gear 3043 further meshes with the first driven gear 303, thereby driving the first driven gear 303 and the threaded shaft 301 fixedly connected to it to rotate. By controlling the forward and reverse rotation of the first drive motor 3041, the direction of gear transmission can be changed, realizing the forward or reverse rotation of the threaded shaft 301, ultimately driving the piston body 201 to rise or fall axially along the washing tank 100; adjusting the motor speed can precisely control the lifting and lowering speed of the piston body 201, adapting to the needs of different operating stages such as stirring and filtering.

[0066] Please refer to the above as well. Figures 1 to 8In one specific embodiment of this application, the function switching device 400 includes a spline shaft 401 rotatably connected between the top cover 102 and the bottom cover 103. A spline hole 402 is opened at the center of the central disk 203 corresponding to the spline shaft 401. A second through hole 403 is opened on the piston body 201 corresponding to the spline shaft 401. The spline shaft 401 passes through the second through hole 403 and is slidably connected to the central disk 203 through the spline hole 402. A second driven gear 404 is fixedly installed on the top of the spline shaft 401. A second drive assembly 405 for driving the second driven gear 404 to rotate is provided inside the top cover 102.

[0067] During operation, when it is necessary to switch the working state of the internal stirring assembly 208 and the internal filtering assembly 207, the second drive assembly 405 inside the top cover 102 is activated, driving the second driven gear 404 to rotate, which in turn drives the spline shaft 401, which is fixedly connected to the second driven gear 404, to rotate synchronously. Since the spline shaft 401 forms a spline connection with the central disk 203 through the spline hole 402, the spline connection can transmit torque and allow axial relative sliding. The rotational force of the spline shaft 401 directly drives the central disk 203 to rotate within the mounting cavity 202 of the piston body 201. At the same time, when the piston body 201 rises and falls, the spline shaft 401 can slide axially along the second through hole 403 and the spline hole 402, without affecting the rising and falling action of the piston body. By controlling the rotation angle of the second drive component 405, the position of the central disk 203 can be precisely adjusted so that the internal filter component 207 in the first mounting hole 205 or the internal stirring component 208 in the second mounting hole 206 is aligned with the first through hole 204 of the piston body 201, thereby achieving function switching.

[0068] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the second drive assembly 405 includes a second drive motor 4051, which is fixedly mounted on the upper part of the top cover 102. A second drive gear 4052 is fixedly mounted on the second drive motor 4051, and the second drive gear 4052 meshes with a second driven gear 404.

[0069] During operation, when the central disk 203 needs to be rotated to switch functions, the second drive motor 4051 starts, and its output shaft drives the second drive gear 4052 to rotate. Since the second drive gear 4052 meshes with the second driven gear 404 at the top of the spline shaft 401, power is transmitted to the second driven gear 404 through gear transmission, thereby driving the spline shaft 401 to rotate synchronously. The spline shaft 401 forms torque transmission with the central disk 203 through the spline hole 402, ultimately driving the central disk 203 to rotate within the mounting cavity 202 of the piston body 201. This achieves alignment or misalignment between the internal filter assembly 207 in the first mounting hole 205 or the internal stirring assembly 208 in the second mounting hole 206 and the first through hole 204, completing the function switch. By controlling the forward and reverse rotation and the rotation angle of the second drive motor 4051, the position of the central disk 203 can be precisely adjusted to meet the switching requirements of different operating modes.

[0070] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the discharge device 500 includes a discharge cover 501 rotatably connected to the bottom cover 103, an external filter device 600 disposed on the discharge cover 501, a plurality of ring-shaped pull rods 502 are hinged to the outer side of the discharge cover 501, a locking nut 503 is threaded onto the pull rods 502, a card seat 504 is fixedly connected to the outer side of the bottom cover 103 corresponding to the pull rods 502, and a sealing gasket is fixedly installed on the end face of the bottom cover 103.

[0071] During normal water washing operation, the discharge cover 501 fits against the bottom cover 103. By rotating the pull rod 502, it is locked into the slot 504 on the outside of the bottom cover 103. Then, the locking nut 503 on the pull rod 502 is tightened. The axial pressure of the nut is used to press the discharge cover 501 tightly onto the bottom cover 103. Together with the sealing gasket on the end face of the bottom cover 103, the discharge port is sealed to prevent material leakage from the tank.

[0072] When the processed material needs to be discharged, first loosen the locking nut 503, turn the pull rod 502 out of the seat 504, and then open the discharge cover 501. The fly ash material that has been preliminarily filtered in the tank can be discharged through the discharge port. At the same time, since the external filter device 600 is set on the discharge cover 501, the material will first pass through the external filter device 600 for filtration during the discharge process, which will help separate the solid and liquid. Finally, the pure solid product will be discharged from the discharge end of the discharge cover 501.

[0073] Please refer to the above as well. Figures 1 to 8In one specific embodiment of this application, the external filtration device 600 includes a first connecting pipe 601, which is sealed and fixedly connected to the first conveying pipe 104. A first electrically controlled valve 602 is fixedly installed on the first connecting pipe 601. A flexible hose 603 is fixedly connected to the end of the first connecting pipe 601 away from the first conveying pipe 104. A filter chamber 604 is opened inside the discharge cover 501. A second filter hole 605 communicating with the filter chamber 604 is opened at the inner end of the discharge cover 501. A second filter element 606 is fixedly installed inside the filter chamber 604. A second connecting pipe 607 communicating with the filter chamber 604 is fixedly and sealedly connected to the outer end of the discharge cover 501. The flexible hose 603 is sealed and connected to the second connecting pipe 607.

[0074] During operation, while the equipment performs internal filtration, the first electrically controlled valve 602 on the first connecting pipe 601 is opened. The fly ash mixture containing a small amount of fine fly ash particles in the tank simultaneously enters the filter chamber 604 through the second filter hole 605 at the inner end of the discharge cover 501, contacting the second filter element 606 inside the filter chamber 604. The liquid passes through the filter media of the second filter element 606, trapping solid particles and achieving deep solid-liquid separation.

[0075] The filtered liquid enters the hose 603 through the second connecting pipe 607 at the outer end of the discharge cover 501, and is then transported to the designated collection or treatment stage via the first connecting pipe 601 and the first conveying pipe 104. Solid particles trapped by the second filter element 606 remain in the filter chamber 604. After the equipment is shut down, the second filter element 606 can be cleaned or replaced by disassembling the discharge cover 501. Furthermore, the flexible connection design of the hose 603 accommodates the opening and closing of the discharge cover 501, avoiding structural interference caused by rigid pipe connections.

[0076] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the water mixing and feeding device 700 includes a mixing tank 701. The bottom of the mixing tank 701 is fixedly and sealed to a feed pipe 702. A second electrically controlled valve 703 is fixedly installed on the feed pipe 702. The feed pipe 702 is fixedly and sealed to a three-way pipe 106. The top of the mixing tank 701 is fixedly and sealed to a feed hopper 704. The outer side of the mixing tank 701 is fixedly and sealed to a water inlet pipe 705 near its top. A third electrically controlled valve 706 is fixedly installed on the water inlet pipe 705. The water inlet pipe 705 is connected to an external water supply device.

[0077] During operation, when the equipment needs to deliver a mixture of fly ash, water, and chemicals into the washing tank 100, a certain amount of fly ash and chemicals are first added into the tank through the feed hopper 704 at the top of the mixing tank 701; then the third electrically controlled valve 706 on the water inlet pipe 705 is opened, and water from the external water supply device flows into the mixing tank 701 through the water inlet pipe 705, where it mixes naturally with the fly ash to form a uniform fly ash mixture.

[0078] After mixing is complete, the second electrically controlled valve 703 on the feed pipe 702 is opened. Under the pressure of the piston device 200 moving, the fly ash mixture in the mixing tank 701 flows through the feed pipe 702 into the three-way pipe 106, and then through the second conveying pipe 105 to the washing tank 100, providing raw materials for subsequent washing operations. By controlling the opening and closing time of the third electrically controlled valve 706, the water inflow can be adjusted, thereby controlling the concentration of the fly ash mixture.

[0079] Please refer to the above as well. Figures 1 to 8 In one specific embodiment of this application, the wastewater discharge device 800 includes a wastewater collection tank 801, a wastewater collection pipe 802 fixedly connected to the top of the wastewater collection tank 801, a fourth electrically controlled valve 803 fixedly installed on the wastewater collection pipe 802, and a fixedly sealed connection between the wastewater collection pipe 802 and the three-way pipe 106; a drain pipe 804 fixedly connected to the bottom of the wastewater collection tank 801, a fifth electrically controlled valve 805 fixedly installed on the drain pipe 804, and the drain pipe 804 connected to an external centralized wastewater treatment system.

[0080] During operation, after the fly ash washing and preliminary filtration are completed in the washing tank 100, when the generated wastewater needs to be discharged, the fourth solenoid valve 803 on the wastewater collection pipe 802 is opened, while the second solenoid valve 703 of the mixing feed device 700 is closed. Under the squeezing pressure of the piston device 200, the wastewater in the tank flows into the tee pipe 106 through the second conveying pipe 105, and then enters the wastewater collection tank 801 through the wastewater collection pipe 802 for temporary storage.

[0081] When the wastewater temporarily stored in the wastewater collection tank 801 reaches a certain volume, or when centralized treatment is required, the fifth electrically controlled valve 805 on the drain pipe 804 is opened. The wastewater in the tank flows into the external centralized wastewater treatment system through the drain pipe 804, completing the orderly discharge of wastewater. By controlling the on / off states of the fourth electrically controlled valve 803 and the fifth electrically controlled valve 805, the collection and discharge rhythm of wastewater can be flexibly adjusted to avoid wastewater accumulating in the washing tank 100 and affecting the washing operation.

[0082] Please refer to the above as well. Figures 1 to 8 In some specific embodiments of this application, the first filter element 2072 and the second filter element 606 may be sintered mesh, filter cloth, filter bag or metal wire mesh, etc.

[0083] During operation, the first filter element 2072 in the internal filter assembly 207 and the second filter element 606 in the external filter device 600 can be selected from materials such as sintered mesh, filter cloth, filter bag or metal wire mesh according to the fly ash particle size, fly ash mixture concentration and treatment requirements, to work together to complete the filtration operation.

[0084] When sintered mesh / metal wire mesh is selected, this type of material has the characteristics of high rigidity and uniform pore size: the first filter element 2072 and the second filter element 606 can trap fly ash particles in the fly ash mixture under the extrusion pressure of the piston body 201, and have high pressure resistance. They are not easily affected by extrusion deformation. At the same time, because the material is wear-resistant, it is suitable for long-term filtration of high-concentration fly ash mixture.

[0085] When filter cloth / filter bag is selected, this type of material has the characteristics of good flexibility and high interception accuracy: the first filter element 2072 and the second filter element 606 can adsorb tiny impurities in fly ash through the fiber gaps of the filter material to ensure filtration purity.

[0086] Regardless of the material used, the fly ash mixture must pass through the pore structure of the filter element. The liquid penetrates the filter element and enters the subsequent flow channel, while solid particles are trapped on the surface or inside of the filter element, achieving solid-liquid separation. Furthermore, filter elements of different materials can be adapted to the installation structure of the filter element mounting cylinder 2071 and the filter chamber 604, ensuring reliable sealing and fixation.

[0087] The implementation principle of a fly ash washing device according to an embodiment of this application is as follows:

[0088] This application achieves fully automated processing of fly ash from feeding, mixing and washing, solid-liquid filtration and separation to wastewater discharge and solid discharge through the coordinated linkage of various functional components. The core logic revolves around "negative pressure feeding, reciprocating lifting and stirring and filtration, positive pressure waste discharge, synchronous filtration protection, and sealed discharge".

[0089] First, the lifting drive device 300 drives the piston device 200 to slide downward. Using the negative pressure formed above the piston body 201, the pre-mixed fly ash, reagent and water fly ash mixture in the mixing feed device 700 is sucked into the washing tank 100 through the three-way pipe 106 and the second conveying pipe 105, completing the efficient feeding of raw materials without the need for additional feeding power and reducing energy consumption.

[0090] Subsequently, the lifting drive device 300 drives the piston body 201 to slide up and down reciprocally, while the function switching device 400 controls the rotation of the central disk 203:

[0091] When switching to the stirring mode, the second mounting hole 206 is aligned with the first through hole 204. The guide tube 2081 and the central column 2084 of the internal stirring assembly 208 use a guide structure with opposite rotation direction to form a counter-current vortex with piston lifting and lowering, so as to achieve full mixing and washing of fly ash and water.

[0092] When switching to the filtration mode, the first mounting hole 205 is aligned with the first through hole 204. The first filter element 2072 of the internal filtration assembly 207 performs preliminary solid-liquid separation on the fly ash mixture under the piston extrusion pressure. The liquid enters the space above the piston, while the solid particles remain at the bottom of the tank.

[0093] During this process, the external filtration device 600 is activated simultaneously: the first electronically controlled valve 602 is opened, and the fly ash mixture in the tank enters the filtration chamber 604 through the second filter hole 605 of the discharge cover 501. It undergoes secondary deep filtration by the second filter element 606. The filtered liquid is discharged through the hose 603 and the first conveying pipe 104, forming synchronous filtration with the internal filtration, thereby improving the separation efficiency. The flexible design of the hose 603 ensures that the opening and closing of the discharge cover 501 is not interfered with.

[0094] After washing and filtration, the lifting drive device 300 drives the piston body 201 to slide upward. Using the positive pressure formed above the piston, the wastewater is forced through the second conveying pipe 105 and the three-way pipe 106 into the wastewater collection tank 801 of the wastewater discharge device 800 for temporary storage. After the amount reaches the standard, it is discharged into the external treatment system through the drain pipe 804 to achieve orderly collection of wastewater. Finally, the locking nut 503 of the discharge device 500 is loosened, the discharge cover 501 is opened, and the solid products after filtration in the tank are discharged, completing the entire fly ash washing operation.

[0095] After the fly ash washing operation is completed, the entire equipment can be cleaned. First, the cleaning solution is introduced into the mixing tank 701 through the water inlet pipe 705 and / or the feed hopper 704. The lifting drive device 300 is controlled to drive the piston device 200 to slide downward. Then, the second electric control valve 703 is opened. Using the negative pressure formed above the piston body 201, the cleaning solution inside the mixing tank 701 is sucked into the chamber located above the piston device 200 inside the washing tank 100.

[0096] Then close the second solenoid valve 703, open the first solenoid valve 602, and control the lifting drive device 300 to drive the piston device 200 to slide upward. The cleaning fluid in the chamber above the piston device 200 will enter the filter chamber 604 through the first connecting pipe 601, the hose 603, and the second connecting pipe 607. The cleaning fluid in the filter chamber 604 will then flow in the opposite direction through the second filter element 606 and the second filter hole 605 into the chamber inside the washing tank 100 located below the piston device 200, thereby cleaning the external filter device 600.

[0097] Then close the first electronic control valve 602, switch to the stirring mode, and control the lifting drive device 300 to drive the piston device 200 to slide up and down. After the piston device 200 slides up and down for a set time, switch to the filtering mode and control the lifting drive device 300 to drive the piston device 200 to slide up and down again, thereby cleaning the internal filter component 207 and the internal stirring component 208.

[0098] Finally, the lifting drive device 300 drives the piston body 201 to slide upward. Using the positive pressure formed above the piston, the cleaning fluid after cleaning is pushed into the wastewater collection tank 801 of the wastewater discharge device 800 through the second conveying pipe 105 and the three-way pipe 106, and then discharged into the external treatment system through the drain pipe 804.

[0099] Throughout the process, the sealing ring 210 of the piston device 200, the sealing connection between the water washing tank 100 and the cover, and the sealing design of each pipeline ensure that there is no leakage throughout the process; the gear-driven lifting drive and function switching device ensure precise and controllable action, ultimately achieving efficient, environmentally friendly, and automated water washing treatment of fly ash.

[0100] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fly ash washing device, characterized in that: The system includes a washing tank (100), with a top cover (102) fixedly and sealed at the top and a bottom cover (103) fixedly and sealed at the bottom. A first conveying pipe (104) and a second conveying pipe (105) are fixedly and sealed to the side wall of the washing tank (100) near the top cover (102). A piston device (200) is slidably and sealed inside the washing tank (100), and the piston device (200) is equipped with an internal filter assembly (207) and an internal stirring assembly (208). The top cover (102) and... Between the bottom cover (103) and inside the washing tank (100), there is a lifting drive device (300) and a function switching device (400) that are connected to the piston device (200); a discharge device (500) is provided on the bottom cover (103), and an external filter device (600) is connected between the first conveying pipe (104) and the discharge device (500); a three-way pipe (106) is connected to the second conveying pipe (105), and the other two ends of the three-way pipe (106) are respectively connected to a water mixing feed device (700) and a wastewater discharge device (800).

2. The fly ash washing equipment according to claim 1, characterized in that: The piston device (200) includes a piston body (201), a central disk (203) is rotatably connected inside the piston body (201), a first through hole (204) is provided on the piston body (201), a first mounting hole (205) and a second mounting hole (206) are provided on the central disk (203) corresponding to the first through hole (204), an internal filter assembly (207) is disposed inside the first mounting hole (205), and an internal stirring assembly (208) is disposed inside the second mounting hole (206); the lifting drive device (300) drives the piston body (201) to move up and down inside the washing tank (100), and the function switching device (400) drives the central disk (203) to rotate so that the first mounting hole (205) or the second mounting hole (206) is aligned with or offset from the first through hole (204).

3. The fly ash washing equipment according to claim 2, characterized in that: The internal filtration assembly (207) includes a filter element mounting cylinder (2071) fixedly installed inside the first mounting hole (205). A first filter element (2072) is fixedly installed inside the filter element mounting cylinder (2071). Both ends of the filter element mounting cylinder (2071) are fixedly and sealed with end caps (2073). Each end cap (2073) has a plurality of evenly distributed first filter holes (2074).

4. The fly ash washing equipment according to claim 2, characterized in that: The internal stirring assembly (208) includes a guide cylinder (2081) rotatably connected inside the second mounting hole (206). The guide cylinder (2081) has an axially arranged central guide hole (2082) at its center. A plurality of spiral guide holes (2083) are centrally symmetrically distributed on the outer side of the central guide hole (2082). A central column (2084) is movably installed inside the central guide hole (2082). A plurality of spiral guide grooves (2085) are centrally symmetrically distributed on the central column (2084). The spiral guide holes (2083) and the spiral guide grooves (2085) rotate in opposite directions.

5. The fly ash washing equipment according to claim 2, characterized in that: The lifting drive device (300) includes a threaded shaft (301) rotatably connected between the top cover (102) and the bottom cover (103). A threaded hole (302) is provided on the piston body (201) corresponding to the threaded shaft (301). The threaded shaft (301) is threadedly connected to the piston body (201) through the threaded hole (302). A first driven gear (303) is fixedly installed on the top of the threaded shaft (301). A first drive assembly (304) for driving the first driven gear (303) to rotate is provided inside the top cover (102).

6. The fly ash washing equipment according to claim 2, characterized in that: The function switching device (400) includes a spline shaft (401) rotatably connected between the top cover (102) and the bottom cover (103). A spline hole (402) is opened at the center of the central disk (203) corresponding to the spline shaft (401). A second through hole (403) is opened on the piston body (201) corresponding to the spline shaft (401). The spline shaft (401) passes through the second through hole (403) and is slidably connected to the central disk (203) through the spline hole (402). A second driven gear (404) is fixedly installed on the top of the spline shaft (401). A second drive assembly (405) for driving the second driven gear (404) to rotate is provided inside the top cover (102).

7. The fly ash washing equipment according to claim 1, characterized in that: The discharge device (500) includes a discharge cover (501) rotatably connected to the bottom cover (103), an external filter device (600) is disposed on the discharge cover (501), a plurality of pull rods (502) arranged in a ring are hinged to the outer side of the discharge cover (501), a locking nut (503) is threaded on the pull rod (502), a card seat (504) is fixedly connected to the outer side of the bottom cover (103) corresponding to the pull rod (502), and a sealing gasket is fixedly installed on the end face of the bottom cover (103).

8. The fly ash washing equipment according to claim 7, characterized in that: The external filtration device (600) includes a first connecting pipe (601), which is sealed and fixedly connected to the first conveying pipe (104). A first electrically controlled valve (602) is fixedly installed on the first connecting pipe (601). A hose (603) is fixedly connected to one end of the first connecting pipe (601) away from the first conveying pipe (104). A filter chamber (604) is opened inside the discharge cover (501). A second filter hole (605) communicating with the filter chamber (604) is opened at the inner end of the discharge cover (501). A second filter element (606) is fixedly installed inside the filter chamber (604). A second connecting pipe (607) communicating with the filter chamber (604) is fixedly and sealedly connected to the outer end of the discharge cover (501). The hose (603) is sealed and connected to the second connecting pipe (607).

9. The fly ash washing equipment according to claim 2, characterized in that: The mixing and feeding device (700) includes a mixing tank (701), a feed pipe (702) is fixedly and sealed to the bottom of the mixing tank (701), a second electrically controlled valve (703) is fixedly installed on the feed pipe (702), and the feed pipe (702) is fixedly and sealed to the three-way pipe (106); a feed hopper (704) is fixedly and sealed to the top of the mixing tank (701), and a water inlet pipe (705) is fixedly and sealed to the outer side of the mixing tank (701) near its top, a third electrically controlled valve (706) is fixedly installed on the water inlet pipe (705), and the water inlet pipe (705) is connected to an external water supply device.

10. A fly ash washing device according to claim 2, characterized in that: The wastewater discharge device (800) includes a wastewater collection tank (801), a wastewater collection pipe (802) is fixedly connected to the top of the wastewater collection tank (801), a fourth electrically controlled valve (803) is fixedly installed on the wastewater collection pipe (802), and the wastewater collection pipe (802) is fixedly and sealed to the three-way pipe (106); a drain pipe (804) is fixedly connected to the bottom of the wastewater collection tank (801), a fifth electrically controlled valve (805) is fixedly installed on the drain pipe (804), and the drain pipe (804) is connected to an external centralized wastewater treatment system.

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