Waste incineration fly ash treatment device

Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a waste incineration fly ash treatment device which comprises a fixing frame. The top of the fixing frame is fixedly connected with a mixing barrel through four supporting columns; the middle part of the mixing cylinder is rotationally connected with a first rotating rod through a bearing, and the first rotating rod is fixedly connected with a plurality of stirring paddles; one side of the mixing cylinder is communicated and fixedly connected with an air inlet pipe; the top of the mixing barrel is fixedly connected with a water inlet pipe and a liquid inlet pipe in a communicating manner; a separation mechanism is arranged at the bottom of the mixing barrel, water and a chelating agent are fully reacted with fly ash by driving a stirring paddle to rotate to form turbid liquid, and then the mixed turbid liquid is separated into solid residues and liquid through a solid-liquid separator; the water content of the solid is prevented from being too high; the cement consumption is obviously increased; the solid strength is reduced; and when the liquid is not separated and directly reacts with cement, chloride ions and sulfate radicals in the liquid corrode a cement matrix, so that the sealing of the heavy metal fails.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a device for treating fly ash from garbage incineration. Background Art

[0002] Incineration has become the primary method for harmless waste treatment, but it also brings with it the problem of huge and rapidly growing fly ash emissions. Fly ash is tiny ash particles emitted during the combustion of fuel. If large amounts of fly ash are not controlled or treated, they will cause air pollution, so environmentally friendly technologies are usually used for fly ash treatment.

[0003] A Chinese patent with publication number CN115026105A discloses a device and method for low-temperature thermal treatment of fly ash from waste incineration, comprising a mixing drum, a support seat being provided at the bottom of the mixing drum, a stirring assembly being fixedly installed in the inner cavity of the mixing drum, a feeding pipe being connected on one side of the mixing drum, and auxiliary material pipes being connected on the front and rear sides of the top of the mixing drum; fly ash from waste incineration is injected into the inner cavity of the mixing drum through the feeding pipe, and stirring water and a chelating agent are respectively injected into the inner cavity of the mixing drum through two sets of auxiliary material pipes, and a flow meter is installed on the auxiliary material pipe to control the filling amount of stirring water and chelating agent; after the loading is completed, the user can turn on the stirring motor through an external controller, and the output shaft of the stirring motor drives the rotating rod to rotate, and the rotation of the rotating rod drives the main stirring rod and the auxiliary stirring rod to stir and mix the material inside the mixing drum; after the mixing and stirring is completed, it is transported to the inner cavity of the fixed shell through a screw conveyor and falls into the inner cavity of the forming mold.

[0004] In the current existing technology, concrete blocks are made after fly ash is treated with a chelating agent in a mixing drum without solid-liquid separation. The unseparated liquid will increase the water-cement ratio of the cement paste, resulting in incomplete cement hydration reaction, increased porosity of the solidified body, a significant decrease in compressive strength, and even cracking or pulverization. In addition, the chloride ions and sulfate groups in the fly ash may be enriched in the solidified body and react with the aluminate in the cement to form chloroaluminate or sulphoaluminate, causing volume expansion, structural degradation, and accelerated corrosion of the solidified body.

[0005] To this end, the present invention provides a waste incineration fly ash treatment device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a waste incineration fly ash treatment device described in the present invention comprises a fixed frame; the top of the fixed frame is fixedly connected to a mixing drum by four pillars; the middle of the mixing drum is rotatably connected to a first rotating rod by a bearing, and a plurality of stirring paddles are fixed on the first rotating rod; one side of the mixing drum is connected and fixedly connected to an air inlet pipe; the top of the mixing drum is connected and fixedly connected to a water inlet pipe and a liquid inlet pipe; a separation mechanism is provided at the bottom of the mixing drum; the separation mechanism includes a solid-liquid separator mounted on the top of the fixed frame; the side wall of the solid-liquid separator is connected and fixedly connected to a water outlet pipe; a purification cylinder is provided on one side of the water outlet pipe; the bottom of the solid-liquid separator is connected and fixedly connected to a solid discharge pipe; a conveying drum is installed on the fixed frame; the bottom of the solid discharge pipe is connected and fixedly connected to the conveying drum; a driving mechanism is provided on the outer side of the first rotating rod; flow meters are installed on both the water inlet pipe and the liquid inlet pipe.

[0008] Preferably, two scraping rods are fixedly connected to the bottom end of the first rotating rod, and the scraping rods are both in contact with the inner wall of the mixing barrel; the top end of the first rotating rod is fixedly connected to an annular tube through a connecting rod, and the top of the annular tube is open and in contact with the top inner wall of the mixing barrel; the bottom of the annular tube is connected to a plurality of telescopic tubes, and the bottom of the telescopic tubes is fixedly connected to a rotating nozzle.

[0009] Preferably, a processing box is provided on the air intake pipe, and two sliding rods are fixedly connected to the inner wall of the processing box; filter plates are slidably connected to the two sliding rods; the outer wall of the filter plate fits with the inner wall of the processing box; a first spring is sleeved on the outer side of the sliding rod; and the two ends of the first spring are respectively fixed to the filter plate and the processing box.

[0010] Preferably, a drop hopper is fixedly connected to the bottom of the purification cylinder, the drop hopper is fixedly connected to the fixed frame, and a discharge valve is provided at the bottom end of the drop hopper; a second rotating rod is rotatably connected to the purification cylinder through a bearing; an L-shaped plate is fixedly connected to the top of the purification cylinder, a first motor is fixedly connected to the L-shaped plate, and the output shaft of the first motor is fixedly connected to the top of the second rotating rod; a stirring rod and a vortex spiral blade are fixedly connected to the outer side wall of the second rotating rod; the vortex spiral blade is arranged inside the drop hopper; a first feed hopper is installed on the top side wall of the purification cylinder.

[0011] Preferably, the driving mechanism includes a second rotating wheel fixedly connected to the second rotating rod; the top of the first rotating rod extends to the top of the mixing drum and is fixedly connected to the first rotating wheel, and a belt is provided between the first rotating wheel and the second rotating wheel.

[0012] Preferably, a filter box is fixedly connected to the outer wall of the purification cylinder, and a through opening is provided between the filter box and the purification cylinder; a permeable membrane is installed on the inner wall of the filter box at one end close to the purification box; an activated carbon plate is installed on the inner wall of the filter box at one end away from the purification box; a water pipe is fixedly connected to the side wall of the filter box away from the purification box; and a water pump is installed on the water pipe.

[0013] Preferably, the conveying cylinder is arranged at an angle, and the end close to the mixing cylinder is set as the bottom end; a fixing plate is fixedly connected to the bottom of the conveying cylinder; a heating chamber is opened on the cylinder wall of the conveying cylinder; a second motor is fixedly connected to the bottom side wall of the conveying cylinder, and the output shaft of the second motor is rotatably connected to the conveying cylinder through a bearing, and the output shaft of the second motor is fixedly connected to the auger blade through an auger shaft; an ozone box is provided on one side of the conveying cylinder; an air pipe is provided between the ozone box and the bottom side wall of the conveying cylinder; a temperature sensor and a concentration sensor are installed on the ozone box.

[0014] Preferably, a preparation box is provided on one side of the conveying cylinder; the other end of the water pipe is connected and fixed to the preparation box; the top end of the conveying cylinder is connected and fixed with a discharge pipe; the discharge pipe is connected and fixed to the top of the preparation box; the top of the preparation box is fixed with a third motor; the output shaft of the third motor is fixed with a third rotating rod, and a plurality of stirring blades and arc blades are fixed on the outer wall of the third rotating rod; the bottom end of the preparation box is connected and fixed with a discharge pipe; the discharge pipe is horizontally aligned with the arc blades.

[0015] Preferably, the preparation box is connected and fixed with a second feed hopper; the top end of the third rotating rod is fixed with a special-shaped gear; one side of the special-shaped gear is provided with a rack, and the special-shaped gear is engaged with the rack; one end of the rack is fixed with a sealing plate; the sealing plate is provided directly below the second feed hopper and fits with the top inner wall of the preparation box; a reset mechanism is provided on one side of the sealing plate.

[0016] Preferably, the reset mechanism includes a mounting plate fixed to the inner wall of the top of the preparation box; two cross bars are fixed to the side wall of the sealing plate, and the mounting plate slides on the two cross bars. The outer sides of the cross bars are each provided with a second spring, and the two ends of the second spring are respectively fixed to the mounting plate and the sealing plate.

[0017] The beneficial effects of the present invention are as follows: 1. The waste incineration fly ash treatment device described in the present invention provides a separation mechanism and drives a stirring paddle to rotate, so that water and a chelating agent fully react with the fly ash to form a suspension, and then the mixed suspension is separated into solid residue and liquid by a solid-liquid separator. The device prevents the solid from having an excessively high moisture content, which would significantly increase the cement dosage and reduce the solid strength. In addition, when the solid directly reacts with cement without separation, the chloride ions and sulfate ions in the liquid will corrode the cement matrix, resulting in failure of heavy metal sealing.

[0018] 2. The waste incineration fly ash treatment device described in the present invention, through the cooperation of the annular tube and the telescopic tube, drives the connecting rod to rotate through the first rotating rod, drives the annular tube to rotate through the connecting rod, and drives the telescopic tube and the rotating nozzle to rotate through the annular tube; by changing the rotation speed of the first rotating rod, under the action of centrifugal force, the telescopic tube rotates in different directions, which is convenient for cooperating with the scraper rod to clean the residue on the inner wall of the mixing barrel, preventing the residue from remaining in the mixing barrel, which not only corrodes the inner wall of the mixing barrel, but also affects the next mixing.

[0019] 3. The waste incineration fly ash treatment device described in the present invention cooperates with an ozone box and a heating chamber. After chelating agent treatment, part of the dioxins are solidified and discharged along with the solids. During the conveying process, the second motor is started to drive the auger blades to rotate to stir the solid mixture in the conveying cylinder. Ozone is input, and the low temperature of the ozone is controlled by a temperature sensor, and the concentration of the ozone is controlled by a concentration sensor. The solid mixture is heated by the heating chamber, and the hot fly ash and the cold ozone wind are continuously mixed in a closed environment, and an oxidation reaction occurs, thereby achieving the purpose of removing dioxins and realizing the function of environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention; Figure 2 It is a schematic structural diagram of the mixing cylinder and the conveying cylinder in the present invention; Figure 3 is a cross-sectional view of the processing box of the present invention; Figure 4 It is a structural schematic diagram of the scraper rod in the present invention; Figure 5 It is a schematic structural diagram of the vortex spiral blade in the present invention; Figure 6 It is a structural schematic diagram of the cross section of the purification cartridge in the present invention; Figure 7 It is a cross-sectional view of the conveying cylinder in the present invention; Figure 8 It is a structural schematic diagram of the arc-shaped blades in the present invention; Figure 9 It is a structural schematic diagram of the cross section of the preparation box in the present invention; In the figure: 1. fixed frame; 2. mixing drum; 21. support; 22. first rotating rod; 221. stirring paddle; 222. scraper; 223. connecting rod; 224. annular pipe; 225. telescopic pipe; 226. rotating nozzle; 23. first rotating wheel; 231. belt; 24. water inlet pipe; 25. liquid inlet pipe; 26. solid-liquid separator; 261. water outlet pipe; 262. solid discharge pipe; 27. air inlet pipe; 271. treatment box; 272. filter plate; 273. slide rod; 274. first spring; 3. purification drum; 31. L-shaped plate; 32. first motor; 33. second rotating rod; 331. stirring rod; 332. vortex spiral blade; 333. second rotating wheel; 34. drop hopper; 3 41. Discharge valve; 35. Filter box; 351. Osmotic membrane; 352. Activated carbon plate; 353. Water pump; 354. Water pipe; 36. First feed hopper; 4. Conveying cylinder; 41. Fixed plate; 42. Ozone box; 421. Temperature sensor; 422. Concentration sensor; 423. Gas pipe; 43. Discharge pipe; 44. Second motor; 45. Heating chamber; 46. Auger blade; 5. Preparation box; 51. Third motor; 52. Second feed hopper; 53. Discharge pipe; 54. Third rotating rod; 541. Mixing blade; 542. Curved blade; 55. Blocking plate; 551. Special-shaped gear; 552. Rack; 553. Second spring; 554. Mounting plate; 555. Cross bar. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 3 As shown, a waste incineration fly ash treatment device according to an embodiment of the present invention comprises a fixing frame 1; a mixing drum 2 is fixedly connected to the top of the fixing frame 1 via four pillars 21; a first rotating rod 22 is rotatably connected to the middle of the mixing drum 2 via a bearing, and a plurality of stirring paddles 221 are fixedly connected to the first rotating rod 22; an air inlet pipe 27 is connected and fixed to one side of the mixing drum 2; a water inlet pipe 24 and a liquid inlet pipe 25 are connected and fixed to the top of the mixing drum 2; a separation mechanism is provided at the bottom of the mixing drum 2; the separation mechanism The mechanism includes a solid-liquid separator 26 installed on the top of the fixed frame 1; a water outlet pipe 261 is connected and fixedly connected to the side wall of the solid-liquid separator 26; a purification cylinder 3 is provided on one side of the water outlet pipe 261; the bottom of the solid-liquid separator 26 is connected and fixedly connected to the solid discharge pipe 262; a conveying cylinder 4 is installed on the fixed frame 1; the bottom of the solid discharge pipe 262 is connected and fixedly connected to the conveying cylinder 4; a driving mechanism is provided on the outside of the first rotating rod 22; and flow meters are installed on both the water inlet pipe 24 and the liquid inlet pipe 25.

[0024] The amount of municipal solid waste generated increases year by year, and incineration has become the primary method for harmless waste treatment. This, in turn, brings with it the problem of huge and rapidly growing fly ash emissions. Fly ash is composed of tiny ash particles emitted during the combustion of fuel. If large amounts of fly ash are not controlled or treated, they will cause air pollution, so environmentally friendly technologies are usually used for fly ash treatment. In existing technologies, fly ash reacts with cement without solid-liquid separation. The unseparated liquid increases the water-cement ratio of the cement slurry, resulting in incomplete cement hydration reaction, increased porosity of the solidified body, a significant decrease in compressive strength, and even cracking or pulverization. In addition, the chloride ions and sulfate ions in the fly ash may be enriched in the solidified body, reacting with the aluminates in the cement to form chloroaluminates or sulphoaluminates, causing volume expansion, structural degradation, and accelerated corrosion of the solidified body.

[0025] When the separation mechanism provided by the present invention is in use, fly ash enters the mixing drum 2 from the air inlet pipe 27. The mixing drum 2 then controls the appropriate amount of water and chelating agent through a flow meter. The driving mechanism then drives the first rotating rod 22 to rotate, which in turn drives the stirring paddle 221 to rotate, allowing the water and chelating agent to fully react with the fly ash to form a suspension. The mixed suspension is then separated into solid residue and liquid by the solid-liquid separator 26. The solid-liquid separator 26 can be a filter press. After solid-liquid separation, the liquid is directly connected to the purification drum 3 via the outlet pipe 261 to remove high concentrations of chloride ions or heavy metals in the liquid. The separated solids are discharged to the conveying drum 4 via the solid discharge pipe 262 and then enter the cement curing process. This prevents excessively high water content in the solids, which significantly increases cement usage and reduces solid strength. Furthermore, if the solids are not separated and directly react with cement, the chloride ions and sulfates in the liquid will corrode the cement matrix, causing heavy metal sealing failure.

[0026] like Figure 2-Figure 4 As shown, the bottom end of the first rotating rod 22 is fixedly connected to two scraping rods 222, and the scraping rods 222 are all in contact with the inner wall of the mixing drum 2; the top end of the first rotating rod 22 is fixedly connected to an annular tube 224 through a connecting rod 223, and the top of the annular tube 224 is open and in contact with the top inner wall of the mixing drum 2; the bottom of the annular tube 224 is connected and fixedly connected to a plurality of telescopic tubes 225, and the bottom of the telescopic tubes 225 are all fixedly connected to a rotating nozzle 226.

[0027] When the annular tube 224 provided by the present invention is in use, the first rotating rod 22 drives the connecting rod 223 to rotate through the first rotating rod 22, and the annular tube 224 is driven to rotate through the connecting rod 223, and the telescopic tube 225 and the rotating nozzle 226 are driven to rotate through the annular tube 224; during the mixing process, by delivering water and chelating agent in the water inlet pipe 24 and the liquid inlet pipe 25, in cleaning the mixing drum 2, by changing the rotation speed of the first rotating rod 22, under the action of centrifugal force, the telescopic tube 225 rotates in different directions, which is convenient for cooperating with the scraper rod 222 to clean the residue on the inner wall of the mixing drum 2, and prevent the residue from remaining in the mixing drum 2, which not only corrodes the inner wall of the mixing drum 2 but also affects the next mixing.

[0028] like Figure 3 As shown, a processing box 271 is provided on the air intake pipe 27, and two sliding rods 273 are fixedly connected to the inner wall of the processing box 271; filter plates 272 are slidably connected to the two sliding rods 273; the outer wall of the filter plate 272 fits with the inner wall of the processing box 271; a first spring 274 is sleeved on the outer side of the sliding rod 273; the two ends of the first spring 274 are respectively fixed to the filter plate 272 and the processing box 271.

[0029] When the processing box 271 provided by the present invention is in use, when fly ash enters through the air inlet pipe 27, it passes through the processing box 271 to filter large particle impurities. The large particle impurities are usually unburned particles and need to be uniformly recovered and then subjected to secondary combustion. During the entry process, the gas easily impacts the filter plate 272. The filter plate 272 swings back and forth under the action of air pressure and spring elastic force, which makes it easy to shake off the impurities on the filter plate 272 and prevent the impurities from clogging the filter plate 272.

[0030] like Figure 1 and Figure 5 As shown, a hopper 34 is fixed to the bottom of the purification cylinder 3, and the hopper 34 is fixed to the fixed frame 1. A discharge valve 341 is provided at the bottom end of the hopper 34; a second rotating rod 33 is rotatably connected to the purification cylinder 3 through a bearing; an L-shaped plate 31 is fixed to the top of the purification cylinder 3, and a first motor 32 is fixed to the L-shaped plate 31, and the output shaft of the first motor 32 is fixed to the top of the second rotating rod 33; a stirring rod 331 and a vortex spiral blade 332 are fixed to the outer side wall of the second rotating rod 33; the vortex spiral blade 332 is arranged inside the hopper 34; a first feed hopper 36 is installed on the top side wall of the purification cylinder 3.

[0031] When the purification cylinder 3 provided by the present invention is in use, the liquid after solid-liquid separation enters the purification cylinder 3, wherein the liquid may contain chlorides, sulfates, sodium ions, potassium ions, etc., as well as heavy metal ions such as Pb²⁺, Cd²⁺, Zn²⁺, etc., and the ions are formed into insoluble precipitates by adding neutralizers, flocculants and oxidants from the first feed hopper 36; by driving the second rotating rod 33 to rotate, the stirring rod 331 is driven to rotate by the second rotating rod 33, and the stirring rod 331 stirs and mixes the above-mentioned ions, wherein the second rotating rod 33 drives the vortex spiral blade 332 to rotate during the rotation process. When the vortex spiral blade 332 rotates, a vortex flow field is generated, which enhances fluid turbulence and promotes the collision and aggregation of tiny particles to form larger flocs. In the early sedimentation stage, the hydraulic retention time is extended to ensure that the particles are fully settled; the centrifugal force generated by the rotation of the blades throws the high-density particles to the pool wall, shortens the sedimentation distance, accelerates sedimentation, and makes the liquid purification meet the discharge standard; the sediment is also a standard emission, realizing environmental protection technology.

[0032] like Figure 5 As shown, the driving mechanism includes a second rotating wheel 333 fixedly connected to the second rotating rod 33; the top of the first rotating rod 22 extends to the top of the mixing drum 2 and is fixedly connected to the first rotating wheel 23, and a belt 231 is provided between the first rotating wheel 23 and the second rotating wheel 333.

[0033] The belt 231 provided by the present invention is used to drive the first rotating rod 22 and the second rotating rod 33 to rotate synchronously when in use. The second rotating rod 33 is driven to rotate by the first motor 32, the second rotating rod 33 is driven to rotate by the second rotating rod 33, the belt 231 is driven to rotate by the second rotating wheel 333, the first rotating wheel 23 is driven to rotate by the belt 231, and the first rotating rod 22 is driven to rotate by the first rotating wheel 23, thereby realizing the function of synchronous stirring of the mixing drum 2 and the purification drum 3.

[0034] like Figure 6 As shown, a filter box 35 is fixedly connected to the outer wall of the purification cartridge 3, and a through opening is provided between the filter box 35 and the purification cartridge 3; a permeable membrane 351 is installed on the inner wall of the filter box 35 at one end close to the purification box; an activated carbon plate 352 is installed on the inner wall of the filter box 35 at one end away from the purification box; a water pipe 354 is fixedly connected to the side wall of the filter box 35 away from the purification box; a water pump 353 is installed on the water pipe 354.

[0035] The filter box 35 provided by the present invention is used to filter organic matter in liquid when in use. The purified liquid is discharged from the port to the filter box 35. The liquid passes through the permeable membrane 351 and the activated carbon plate 352 in the filter box 35. The permeable membrane 351 is used to filter residual salt and heavy metals in the liquid; the organic matter in the liquid is filtered through the activated carbon plate 352, and then discharged to the preparation box 5 through the water pipe 354 for reuse, thereby achieving the functions of environmental protection and energy saving.

[0036] like Figure 1 、 Figure 2 and Figure 7 As shown, the conveying cylinder 4 is arranged at an angle, and the end close to the mixing cylinder 2 is set as the bottom end; a fixing plate 41 is fixedly connected to the bottom of the conveying cylinder 4; a heating chamber 45 is opened on the cylinder wall of the conveying cylinder 4; a second motor 44 is fixedly connected to the bottom side wall of the conveying cylinder 4, and the output shaft of the second motor 44 is rotatably connected to the conveying cylinder 4 through a bearing, and the output shaft of the second motor 44 is fixedly connected to the auger blade 46 through the auger shaft; an ozone box 42 is provided on one side of the conveying cylinder 4; an air pipe 423 is connected between the ozone box 42 and the bottom end side wall of the conveying cylinder 4; a temperature sensor 421 and a concentration sensor 422 are installed on the ozone box 42.

[0037] When the ozone box 42 and heating chamber 45 provided by the present invention are in use, after chelating agent treatment, part of the dioxins are solidified and discharged together with the solids. During the conveying process, the second motor 44 is started to drive the auger blade 46 to rotate to stir the solid mixture in the conveying cylinder 4. Ozone is input, and the low temperature of the ozone is controlled by the temperature sensor 421, and the concentration of the ozone is controlled by the concentration sensor 422. The solid mixture is heated by the heating chamber 45. The hot fly ash and the cold ozone wind are continuously mixed in a closed environment, and an oxidation reaction occurs, thereby achieving the purpose of removing dioxins and realizing the environmental protection function.

[0038] like Figure 7 and Figure 8 As shown, a preparation box 5 is provided on one side of the conveying cylinder 4; the other end of the water pipe 354 is connected and fixed to the preparation box 5; the top of the conveying cylinder 4 is connected and fixed with a discharge pipe 43; the discharge pipe 43 is connected and fixed to the top of the preparation box 5; the top of the preparation box 5 is fixed with a third motor 51; the output shaft of the third motor 51 is fixed with a third rotating rod 54, and a plurality of stirring blades 541 and arc-shaped blades 542 are fixed on the outer wall of the third rotating rod 54; the bottom end of the preparation box 5 is connected and fixed with a discharge pipe 53; the discharge pipe 53 is horizontally aligned with the arc-shaped blades 542.

[0039] When the stirring blades 541 and the curved blades 542 provided by the present invention are in use, the solids processed by the conveying cylinder 4 fall into the preparation box 5 through the discharge pipe 43, and the liquid processed by the purification cylinder 3 and the filter box 35 is transported to the preparation box 5, and then cement is put into the second feed hopper 52 for mixing. During the mixing process, by turning on the third motor 51, the third motor 51 drives the third rotating rod 54 to rotate through the output shaft, and the stirring blades 541 and the curved blades 542 are driven to rotate through the third rotating rod 54, so as to facilitate the mixing and discharging of the mixture.

[0040] like Figure 8 As shown, the preparation box 5 is connected and fixed with a second feed hopper 52; the top of the third rotating rod 54 is fixed with a special-shaped gear 551; a rack 552 is provided on one side of the special-shaped gear 551, and the special-shaped gear 551 is engaged with the rack 552; one end of the rack 552 is fixed with a sealing plate 55; the sealing plate 55 is provided directly below the second feed hopper 52 and fits against the top inner wall of the preparation box 5; a reset mechanism is provided on one side of the sealing plate 55.

[0041] The blocking plate 55 provided by the present invention is used for intermittent feeding of cement when in use. During the rotation of the third rotating rod 54, the third rotating rod 54 drives the special-shaped gear 551 to rotate, and the special-shaped gear 551 drives the rack 552 to move. During the movement, the rack 552 drives the blocking plate 55 to move, and the blocking plate 55 leaves the bottom of the second feed hopper 52, and cement falls into the second feed hopper 52; as the special-shaped gear 551 rotates until it no longer meshes with the rack 552, under the action of the reset mechanism, the blocking plate 55 is quickly reset to block the second feed hopper 52, thereby completing one feeding, until the special-shaped gear 551 rotates again to mesh with the rack 552 for the next feeding, thereby realizing the function of intermittent feeding.

[0042] like Figure 9 As shown, the reset mechanism includes a mounting plate 554 fixed to the inner wall of the top of the preparation box 5; two cross bars 555 are fixed to the side wall of the blocking plate 55, and the mounting plate 554 slides on the two cross bars 555. The outer sides of the cross bars 555 are each provided with a second spring 553, and the two ends of the second spring 553 are respectively fixed to the mounting plate 554 and the blocking plate 55.

[0043] The reset mechanism provided by the present invention is used for the rapid reset of the blocking plate 55 when in use; the rack 552 is driven to move by the special-shaped gear 551, and the rack 552 drives the blocking plate 55 to move during the movement, and the blocking plate 55 leaves the bottom of the second feed hopper 52, and cement falls from the second feed hopper 52. At this time, the second spring 553 is compressed; as the special-shaped gear 551 rotates, until it is no longer engaged with the rack 552, under the action of the second spring 553, the blocking plate 55 quickly slides and resets on the cross bar 555.

[0044] Working Principle: The amount of municipal solid waste generated increases year by year. Incineration has become the main method for harmless waste treatment, but it also brings about the problem of huge and rapidly growing fly ash emissions. Fly ash is tiny ash particles discharged during the combustion of fuel. If a large amount of fly ash is not controlled or treated, it will cause air pollution, so environmentally friendly technologies are usually used for fly ash treatment. In the existing technology, the fly ash reacts with cement without solid-liquid separation, and the unseparated liquid will increase the water-cement ratio of the cement slurry, resulting in incomplete cement hydration reaction, increased porosity of the solid body, a significant decrease in compressive strength, and even cracking or pulverization. In addition, the chloride ions and sulfate groups in the fly ash may be enriched in the solid body, reacting with the aluminate in the cement to form chloroaluminate or sulphoaluminate, resulting in volume expansion, structural degradation, and accelerated corrosion of the solid body.

[0045] When the separation mechanism provided by the present invention is in use, the fly ash enters the mixing drum 2 from the air inlet pipe 27, and passes through the processing box 271 to filter large particles of impurities. The large particles of impurities are usually unburned particles and need to be collected uniformly and then subjected to secondary combustion. During the gas entering the filter plate 272, the filter plate 272 swings back and forth under the action of air pressure and spring force, which facilitates the shaking off of impurities on the filter plate 272 and prevents the impurities from clogging the filter plate 272. Then, the mixing drum 2 controls the appropriate amount of water and chelating agent through the flow meter, and then drives the first rotating rod 22 to rotate through the driving mechanism, and drives the stirring paddle 221 to rotate through the first rotating rod 22, so that the water and chelating agent fully react with the fly ash to form a suspension, which is then passed through the solid-liquid separator 26 The mixed suspension is separated into solid residue and liquid; the solid-liquid separator 26 is a filter press; the first rotating rod 22 drives the connecting rod 223 to rotate through the first rotating rod 22, drives the annular tube 224 to rotate through the connecting rod 223, and drives the telescopic tube 225 and the rotating nozzle 226 to rotate through the annular tube 224; during the mixing process, by conveying water and chelating agent in the water inlet pipe 24 and the liquid inlet pipe 25, in the cleaning mixing drum 2, by changing the rotation speed of the first rotating rod 22, under the action of centrifugal force, the telescopic tube 225 rotates in different directions, which is convenient for cooperating with the scraper 222 to clean the residue on the inner wall of the mixing drum 2, and prevent the residue from remaining in the mixing drum 2, which not only corrodes the inner wall of the mixing drum 2, but also affects the next mixing.

[0046] After solid-liquid separation, the liquid is directly connected to the purification cylinder 3 through the outlet pipe 261 to remove high-concentration chloride ions or heavy metals in the liquid; the liquid may contain chlorides, sulfates, sodium ions, potassium ions, etc., as well as heavy metal ions such as Pb²⁺, Cd²⁺, Zn²⁺, etc., and the ions are formed into insoluble precipitates by adding neutralizers, flocculants and oxidants from the first feed hopper 36; by driving the second rotating rod 33 to rotate, the stirring rod 331 is driven to rotate by the second rotating rod 33, and the stirring rod 331 moves the above ions into the liquid. The second rotating rod 33 is used for stirring and mixing, wherein the second rotating rod 33 drives the vortex spiral blade 332 to rotate during the rotation process. The vortex spiral blade 332 generates a vortex flow field when rotating, thereby enhancing the fluid turbulence, prompting small particles to collide with each other and aggregate to form larger flocs. In the early sedimentation stage, the hydraulic retention time is extended to ensure that the particles are fully settled. The centrifugal force generated by the rotation of the blades throws the high-density particles to the pool wall, shortens the settling distance, accelerates sedimentation, and makes the liquid purification meet the discharge standard. The sediment is also a standard emission, realizing environmental protection technology.

[0047] The separated solid is discharged to the conveying cylinder 4 through the solid discharge pipe 262. After the chelating agent treatment, part of the dioxins are solidified and discharged together with the solids. During the conveying process, the second motor 44 is started to drive the auger blade 46 to rotate to stir the solid mixture in the conveying cylinder 4. Ozone is input, and the low temperature of the ozone is controlled by the temperature sensor 421. The concentration of the ozone is controlled by the concentration sensor 422. The solid mixture is heated by the heating chamber 45. The hot fly ash and the cold ozone wind are continuously mixed in a closed environment and an oxidation reaction occurs, thereby achieving the purpose of removing dioxins and realizing the environmental protection function; preventing the solid moisture content from being too high, which will significantly increase the cement consumption and reduce the solid strength; and when the liquid directly reacts with cement without separation, the chloride ions and sulfate ions in the liquid will corrode the cement matrix, resulting in failure of heavy metal sealing.

[0048] The solids processed by the conveying cylinder 4 fall into the preparation box 5 through the discharge pipe 43, and the liquid processed by the purification cylinder 3 and the filter box 35 is transported to the preparation box 5, and then cement is put into the second feed hopper 52 for mixing. During the mixing process, the third motor 51 is turned on, and the third motor 51 drives the third rotating rod 54 to rotate through the output shaft, and the third rotating rod 54 drives the stirring blade 541 and the arc blade 542 to rotate, so as to facilitate the mixing and discharging of the mixture; during the rotation process of the third rotating rod 54, the third rotating rod 54 drives the special-shaped gear 55 1 rotates, and the rack 552 is driven to move by the special-shaped gear 551. The rack 552 drives the blocking plate 55 to move during the movement. The blocking plate 55 leaves the bottom of the second feed hopper 52, and cement falls into the second feed hopper 52. As the special-shaped gear 551 rotates until it is no longer engaged with the rack 552, the blocking plate 55 is quickly reset under the action of the second spring 553 to block the second feed hopper 52, thereby completing one feeding. Until the special-shaped gear 551 rotates again to engage with the rack 552, the next feeding is carried out, thereby realizing the function of intermittent feeding.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste incineration fly ash treatment device, comprising a fixed frame (1); a mixing drum (2) is fixedly connected to the top of the fixed frame (1) via four pillars (21); a first rotating rod (22) is rotatably connected to the middle of the mixing drum (2) via a bearing, and a plurality of stirring paddles (221) are fixedly connected to the first rotating rod (22); an air inlet pipe (27) is connected to and fixedly connected to one side of the mixing drum (2); a water inlet pipe (24) and a liquid inlet pipe (25) are connected to and fixedly connected to the top of the mixing drum (2); a separation mechanism is provided at the bottom of the mixing drum (2); and the characteristics are: The separation mechanism comprises a solid-liquid separator (26) mounted on the top of a fixed frame (1); a water outlet pipe (261) is connected and fixedly connected to the side wall of the solid-liquid separator (26); a purification cylinder (3) is provided on one side of the water outlet pipe (261); a solid discharge pipe (262) is connected and fixedly connected to the bottom of the solid-liquid separator (26); a conveying cylinder (4) is mounted on the fixed frame (1); the bottom of the solid discharge pipe (262) is connected and fixedly connected to the conveying cylinder (4); a driving mechanism is provided on the outer side of the first rotating rod (22); and flow meters are installed on both the water inlet pipe (24) and the liquid inlet pipe (25).

2. The waste incineration fly ash treatment device according to claim 1, characterized in that: The bottom end of the first rotating rod (22) is fixedly connected to two scraping rods (222), and the scraping rods (222) are both in contact with the inner wall of the mixing barrel (2); the top end of the first rotating rod (22) is fixedly connected to an annular tube (224) via a connecting rod (223), and the top of the annular tube (224) is open and in contact with the top inner wall of the mixing barrel (2); the bottom of the annular tube (224) is connected and fixedly connected to a plurality of telescopic tubes (225), and the bottoms of the telescopic tubes (225) are all fixedly connected to rotating nozzles (226).

3. The waste incineration fly ash treatment device according to claim 2, characterized in that: A processing box (271) is provided on the air inlet pipe (27), and two sliding rods (273) are fixedly connected to the inner wall of the processing box (271); a filter plate (272) is slidably connected to the two sliding rods (273); the outer wall of the filter plate (272) is in contact with the inner wall of the processing box (271); a first spring (274) is sleeved on the outer side of the sliding rod (273); and the two ends of the first spring (274) are respectively fixed to the filter plate (272) and the processing box (271).

4. The waste incineration fly ash treatment device according to claim 3, characterized in that: A drop hopper (34) is fixedly connected to the bottom of the purification cylinder (3), and the drop hopper (34) is fixedly connected to the fixed frame (1). A discharge valve (341) is provided at the bottom end of the drop hopper (34); a second rotating rod (33) is rotatably connected to the purification cylinder (3) via a bearing; an L-shaped plate (31) is fixedly connected to the top of the purification cylinder (3), and a first motor (32) is fixedly connected to the L-shaped plate (31), and an output shaft of the first motor (32) is fixedly connected to the top of the second rotating rod (33); a stirring rod (331) and a vortex spiral blade (332) are fixedly connected to the outer side wall of the second rotating rod (33); the vortex spiral blade (332) is arranged inside the drop hopper (34); and a first feed hopper (36) is installed on the top side wall of the purification cylinder (3).

5. The waste incineration fly ash treatment device according to claim 4, characterized in that: The driving mechanism comprises a second rotating wheel (333) fixedly connected to a second rotating rod (33); the top of the first rotating rod (22) extends above the mixing drum (2) and is fixedly connected to the first rotating wheel (23); a belt (231) is provided between the first rotating wheel (23) and the second rotating wheel (333).

6. The waste incineration fly ash treatment device according to claim 5, characterized in that: A filter box (35) is fixedly connected to the outer wall of the purification cylinder (3), and a through opening is provided between the filter box (35) and the purification cylinder (3); a permeable membrane (351) is installed on the inner wall of the filter box (35) at one end close to the purification box; an activated carbon plate (352) is installed on the inner wall of the filter box (35) at one end away from the purification box; a water pipe (354) is fixedly connected to the side wall of the filter box (35) away from the purification box; and a water pump (353) is installed on the water pipe (354).

7. The waste incineration fly ash treatment device according to claim 6, characterized in that: The conveying cylinder (4) is arranged at an angle, and the end close to the mixing cylinder (2) is set as the bottom end; a fixing plate (41) is fixedly connected to the bottom of the conveying cylinder (4); a heating chamber (45) is opened on the cylinder wall of the conveying cylinder (4); a second motor (44) is fixedly connected to the bottom side wall of the conveying cylinder (4), the output shaft of the second motor (44) is rotatably connected to the conveying cylinder (4) through a bearing, and the output shaft of the second motor (44) is fixedly connected to an auger blade (46) through an auger shaft; an ozone box (42) is provided on one side of the conveying cylinder (4); an air delivery pipe (423) is provided between the ozone box (42) and the bottom side wall of the conveying cylinder (4); a temperature sensor (421) and a concentration sensor (422) are installed on the ozone box (42).

8. The waste incineration fly ash treatment device according to claim 7, characterized in that: A preparation box (5) is provided on one side of the conveying cylinder (4); the other end of the water delivery pipe (354) is connected and fixed to the preparation box (5); the top end of the conveying cylinder (4) is connected and fixed to a discharge pipe (43); the discharge pipe (43) is connected and fixed to the top of the preparation box (5); a third motor (51) is fixed to the top of the preparation box (5); the output shaft of the third motor (51) is fixed to a third rotating rod (54), and a plurality of stirring blades (541) and arc-shaped blades (542) are fixed to the outer wall of the third rotating rod (54); the bottom end of the preparation box (5) is connected and fixed to a discharge pipe (53); the discharge pipe (53) is horizontally aligned with the arc-shaped blades (542).

9. The waste incineration fly ash treatment device according to claim 8, characterized in that: The preparation box (5) is connected and fixedly connected to a second feed hopper (52); a top end of the third rotating rod (54) is fixedly connected to a special-shaped gear (551); a rack (552) is provided on one side of the special-shaped gear (551), and the special-shaped gear (551) is meshed with the rack (552); a blocking plate (55) is fixedly connected to one end of the rack (552); the blocking plate (55) is provided directly below the second feed hopper (52) and is in contact with the top inner wall of the preparation box (5); a reset mechanism is provided on one side of the blocking plate (55).

10. The waste incineration fly ash treatment device according to claim 9, characterized in that: The reset mechanism comprises a mounting plate (554) fixed to the inner wall of the top of the preparation box (5); two cross bars (555) are fixed to the side wall of the blocking plate (55); the mounting plate (554) slides on the two cross bars (555); the outer sides of the cross bars (555) are sleeved with second springs (553); the two ends of the second spring (553) are respectively fixed to the mounting plate (554) and the blocking plate (55).

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