Garbage power generation fly ash recycling device and method

Abstract

The invention relates to the technical field of fly ash recycling, and discloses a garbage power generation fly ash recycling device and method, and the garbage power generation fly ash recycling device comprises a boiler, a desulfurization tower, a bag-type dust collector, a fly ash collecting mechanism, a kneading mechanism and a ball forming mill. The fly ash and the landfill leachate concentrated solution are stirred and mixed in the kneading mechanism to form a solidified material, the solidified material is formed through the ball forming mill and then fed into the incinerator grate drying section of the boiler through the special channel to assist household garbage in combustion, and the garbage can be efficiently and harmlessly treated; fly ash and concentrated leachate generated in the operation process of a power generation project are free of secondary pollution; meanwhile, resource utilization of the fly ash can be achieved, a special sintering facility does not need to be newly built or landfill does not need to be conducted, and the problem that traditional fly ash treatment needs high energy consumption or occupies precious land resources is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash recycling, and in particular to a device and method for recycling fly ash for waste-to-energy power generation. Background Art

[0002] In recent years, membrane treatment technology has been widely used in the landfill leachate concentrate treatment industry, but a large amount of membrane concentrate will also be produced. Due to its high salt content and high concentration of difficult-to-degrade organic pollutants, its harmless disposal has become a difficult problem that needs to be urgently solved by waste-to-energy companies and government management departments.

[0003] After the incineration of domestic waste, waste-to-energy plants will produce a large amount of fly ash. The fly ash has a complex composition, contains a variety of heavy metals, dioxins and other harmful substances, and has a large volume. At present, the treatment of waste incineration flue gas generally introduces the fly ash and flue gas generated by the combustion of domestic waste in the boiler into the desulfurization tower through the flue gas duct for a series of reactions and sedimentation, and then discharges the qualified flue gas. The collected fly ash is chelated and solidified and landfilled or sent to a qualified hazardous waste unit for landfill, sintering or cement kiln co-disposal. However, the risk of secondary pollution from landfill is high; the cost of disposal in hazardous waste units is high, and if improperly handled, it is easy to cause environmental pollution incidents. Therefore, it is very necessary to propose a waste-to-energy fly ash recycling device and method. Summary of the invention

[0004] The object of the present invention is to provide a waste-to-energy fly ash recycling device and method, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the existing disposal technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a waste-to-energy fly ash recycling device, comprising:

[0006] A boiler, wherein the fly ash and flue gas generated by the combustion of garbage in the grate of the boiler are transported to a desulfurization tower through a flue gas duct for treatment;

[0007] The desulfurization tower deacidifies the flue gas generated by the burning of garbage in the grate, and the collected fly ash falls into the collection pipe;

[0008] A bag filter, the bag filter is used to further filter the flue gas after desulfurization in the desulfurization tower to remove fly ash, and the filtered fly ash falls into the collection pipe;

[0009] A fly ash collecting mechanism, which collects and stores the fly ash in the collection pipe;

[0010] A kneading mechanism, wherein the kneading mechanism is used to knead and stir the landfill leachate concentrate with the fly ash in the fly ash collection mechanism;

[0011] The ball forming machine processes the mixture of fly ash and landfill leachate concentrate stirred by the kneading mechanism into balls, and then directly sends the mixture into the incineration grate drying section of the boiler through a dedicated channel.

[0012] In the waste-to-energy fly ash recycling device according to the present invention, optionally, the fly ash collection mechanism includes a fly ash bin, a first scraper and a zipper machine, an exhaust port is opened at the top of the fly ash bin, a filtering mechanism is arranged inside the fly ash bin, the filtering mechanism is used to intercept and filter fly ash discharged from the exhaust port, an anti-blocking mechanism is arranged inside the fly ash bin to prevent the filtering mechanism from being blocked, the first scraper is used to scrape the fly ash in the collection pipe, the feed port of the zipper machine is connected with the discharge port of the first scraper machine, and the discharge port of the zipper machine is connected with the interior of the fly ash bin, an insulation and heating device is arranged outside the fly ash bin, the insulation and heating device is used to heat and insulate the fly ash entering the fly ash bin to prevent the fly ash from absorbing moisture and forming a crust and blocking the material, and the outer wall of the fly ash bin is provided with a vibration mechanism to prevent blocking.

[0013] In the waste-to-energy fly ash recycling device according to the present invention, optionally, the filtering mechanism includes a connecting pipe and a cloth bag, the connecting pipe is fixedly installed in the exhaust port, the upper end of the cloth bag is fixedly connected to the connecting pipe, a plurality of annular plates are fixedly connected to the cloth bag at equal distances from top to bottom, a plurality of return springs are arranged between two adjacent annular plates, a plurality of connecting ears for hanging the return springs are fixedly welded to the outer wall of the annular plate, and a plurality of return springs are connected between the connecting pipe and the annular plate located at the top.

[0014] In the waste-to-energy fly ash recycling device according to the present invention, optionally, the anti-blocking mechanism includes a mounting seat and a support beam, the mounting seat and the support beam are both fixedly mounted inside the fly ash bin, one end of the mounting seat is rotatably connected to a rotating rod, the rotating rod is fixedly connected to a fan gear, the support beam is fixedly connected to a concave guide sleeve, the inner side of the concave guide sleeve is slidably plugged with a rack, the fan gear can mesh with the rack, the upper end of the rack is fixedly connected to the annular plate located at the bottom of the cloth bag through a number of connecting rods, and an anti-blocking motor for driving the fan gear to rotate is provided on the mounting seat, the rotating shaft of the anti-blocking motor is fixedly connected to one end of the rotating rod, and the anti-blocking motor is fixedly mounted on the outer wall of the fly ash bin.

[0015] In the garbage-to-energy fly ash recycling device according to the present invention, optionally, the kneading mechanism includes a kneading box, a metering pump is fixedly installed on the top of the kneading box, the liquid inlet of the metering pump is connected to a storage tank for storing garbage leachate concentrate through a pipeline, the liquid outlet of the metering pump is connected to the interior of the kneading box, the interior of the kneading box is rotatably connected with two rotating shafts, both of which are fixedly connected with mixing spiral blades, and the spiral rotation directions of the two mixing spiral blades are opposite, a kneading motor is fixedly installed on the outer wall of the kneading box through a motor seat, the rotating shaft of the kneading motor is fixedly connected to one of the rotating shafts, and synchronous wheels are fixedly connected to the two rotating shafts, and the two synchronous wheels are connected by a synchronous belt transmission, and a discharge pipe is connected to one side of the kneading box, and a discharge valve is installed on the discharge pipe.

[0016] In the waste-to-energy fly ash recycling device according to the present invention, optionally, an arcuate groove corresponding to the two mixing spiral blades is opened inside the kneading box, the mixing spiral blade is rotatably arranged in the arcuate groove, and a convexity is arranged between the two arcuate grooves.

[0017] In the waste-to-energy fly ash recycling device according to the present invention, optionally, a conveying pipe is provided between the discharge port of the fly ash bin and the feed port of the kneading mechanism, and a second scraper is provided in the conveying pipe, and the second scraper is used to deliver fly ash that falls from the fly ash bin into the conveying pipe into the interior of the kneading mechanism.

[0018] The present invention also provides a method for recycling fly ash from waste-to-energy power generation, which uses the above-mentioned waste-to-energy fly ash recycling device to recycle fly ash, and specifically includes the following steps:

[0019] S1. Fly ash collection: The fly ash and flue gas generated by the burning of garbage in the boiler grate are processed by the desulfurization tower and bag filter in turn, and the filtered fly ash is sent to the fly ash bin for centralized collection through the first scraper and zipper machine;

[0020] S2, mixing the landfill leachate concentrate with fly ash: delivering the fly ash in the fly ash bin into the kneading box through the delivery pipeline and the second scraper, then starting the metering pump to deliver the landfill leachate concentrate into the kneading box, and then starting the kneading motor to fully mix the fly ash with the landfill leachate concentrate;

[0021] S3. Balling: The mixed fly ash and landfill leachate concentrate are sent into a ball-forming machine to be made into spherical particles, and then the spherical mixture is directly sent to the incineration grate drying section of the boiler through a dedicated channel for disposal.

[0022] In the method for recycling waste-to-energy fly ash according to the present invention, in the step S2, a binder is added to the kneading mechanism, and the binder is at least one of polyvinyl alcohol, carboxymethyl cellulose, epoxy resin, polyurethane, and polystyrene.

[0023] In the method for recycling fly ash from waste-to-energy according to the present invention, in step S2, the amount of the landfill leachate concentrate added is 20% to 30% of the amount of fly ash.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention mixes fly ash and landfill leachate concentrate and then enters the mixture with domestic waste into the drying section of the incinerator of the power plant for combustion. Compared with other technologies, the present invention has low energy consumption and economic cost, low initial investment, and can effectively save the operation cost of the enterprise. At the same time, the fly ash and leachate concentrate can be treated efficiently and harmlessly without secondary pollution, thus avoiding the environmental risks of fly ash in the subsequent treatment process.

[0026] The filter mechanism can filter the fly ash in the fly ash bin, and the anti-blocking mechanism can effectively avoid the clogging of the filter mechanism, thereby ensuring the stable operation of the filter mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the waste-to-energy fly ash recycling device of the present invention;

[0028] Figure 2 It is a partial structural schematic diagram of the fly ash recycling device for waste-to-energy of the present invention;

[0029] Figure 3 This is one of the structural schematic diagrams of the pelletizing machine in the waste-to-energy fly ash recycling device of the present invention;

[0030] Figure 4 This is the second structural schematic diagram of the pelletizing machine in the garbage-to-energy fly ash recycling device of the present invention;

[0031] Figure 5 It is a schematic cross-sectional structure diagram of a pelletizing machine in the waste-to-energy fly ash recycling device of the present invention;

[0032] Figure 6 It is a structural schematic diagram of a ball-forming roller in the garbage-to-energy fly ash recycling device of the present invention;

[0033] Figure 7 It is a partial structural schematic diagram of a ball-forming roller in the waste-to-energy fly ash recycling device of the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the material return rod in the waste-to-energy fly ash recycling device of the present invention;

[0035] Fig. 9 It is a schematic cross-sectional structure diagram of a ball-forming roller in the waste-to-energy fly ash recycling device of the present invention;

[0036] Fig.10 It is a structural schematic diagram of the kneading mechanism in the waste-to-energy fly ash recycling device of the present invention;

[0037] Fig.11 This is one of the cross-sectional structural schematic diagrams of the kneading mechanism in the garbage-to-energy fly ash recycling device of the present invention;

[0038] Fig.12 The second schematic diagram of the cross-sectional structure of the kneading mechanism in the garbage-to-energy fly ash recycling device of the present invention;

[0039] Fig.13 It is a schematic cross-sectional structure diagram of a fly ash bin in the waste-to-energy fly ash recycling device of the present invention;

[0040] Fig.14 This is one of the structural schematic diagrams of the filtering mechanism in the garbage-to-energy fly ash recycling device of the present invention;

[0041] Fig.15 This is the second structural schematic diagram of the filtering mechanism in the garbage-to-energy fly ash recycling device of the present invention.

[0042] In the figure: 1. boiler; 101. desulfurization tower; 102. bag filter; 103. collection pipe;

[0043] 2. Fly ash bin; 201. Vibrating mechanism; 202. Insulation and heating device;

[0044] 203, filtering mechanism; 2031, connecting pipe; 2032, annular plate; 2033, cloth bag; 2034, return spring;

[0045] 204, anti-blocking motor; 2041, mounting seat; 2042, rotating rod; 2043, limiting block; 2044, sector gear; 2045, supporting beam; 2046, concave guide sleeve; 2047, rack; 2048, connecting rod;

[0046] 3. Transportation pipeline;

[0047] 4. kneading mechanism; 401. kneading box; 4011. adhesive delivery port; 402. motor seat; 403. kneading motor; 404. rotating shaft; 405. mixing spiral blade; 406. arc groove; 407. discharge pipe; 408. synchronous wheel; 409. synchronous belt; 410. metering pump;

[0048] 5. Ball forming machine; 501. Box body; 5011. Feeding port; 5012. Ball material discharge port; 5013. Mounting plate; 5014. Support plate; 502. Ball forming roller; 5021. Ball forming groove; 50211. Through hole; 5022. Side plate; 5023. Tubular shaft; 503. Material return mechanism; 5031. Material return rod; 50311. Extrusion protrusion; 50312. Fixed rod; 5032. Columnar rod; 5033. Material ejector rod; 5034. Spring; 504. Driving motor; 5041. First gear; 5042. Second gear; 5043. Synchronous belt; 5044. Third gear. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0050] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0051] Example 1

[0052] See also Figures 1 to 15 , this embodiment provides the following technical solutions:

[0053] A garbage power generation fly ash recycling device, comprising:

[0054] Boiler 1, the fly ash and flue gas generated by the burning of garbage in the grate of boiler 1 are transported to the desulfurization tower 101 through the flue gas duct for treatment;

[0055] The desulfurization tower 101 deacidifies the flue gas generated by the burning of garbage in the grate, and the collected fly ash falls into the collection pipe 103;

[0056] The bag filter 102 is used to further filter the fly ash from the flue gas after desulfurization in the desulfurization tower 101, and the filtered fly ash falls into the collection pipe 103;

[0057] A fly ash collection mechanism collects and stores the fly ash in the collection pipe 103;

[0058] The kneading mechanism 4 is used to knead and stir the landfill leachate concentrate with the fly ash in the fly ash collection mechanism;

[0059] The ball forming machine 5 processes the mixture of fly ash and landfill leachate concentrate stirred by the kneading mechanism 4 into a ball shape, and then directly sends it to the incineration grate furnace drying section of the boiler 1 through a dedicated channel.

[0060] In this embodiment, the ball forming machine 5 is a double-roller ball press.

[0061] In this embodiment, the fly ash collection mechanism includes a fly ash bin 2, a first scraper and a zipper machine. The first scraper machine is used to scrape the fly ash in the collection pipe 103. The feed port of the zipper machine is connected to the discharge port of the first scraper machine. The discharge port of the zipper machine is connected to the interior of the fly ash bin 2. The outside of the fly ash bin 2 is provided with a thermal insulation and heating device 202. The thermal insulation and heating device 202 is used to heat and insulate the fly ash entering the fly ash bin 2 to prevent the fly ash from absorbing moisture and forming a crust and clogging. The outer wall of the fly ash bin 2 is provided with a vibration mechanism 201 to prevent clogging.

[0062] In this embodiment, the vibration mechanism 201 is a vibration motor, and the heat preservation and heating device 202 includes a heat preservation sleeve, which is arranged on the fly ash bin 2. An electric heating plate is arranged in the heat preservation sleeve, and the electric heating plate is attached to the outer wall of the fly ash bin 2.

[0063] In this embodiment, an exhaust port is provided at the top of the fly ash bin 2, and a filter mechanism 203 is provided inside the fly ash bin 2. The filter mechanism 203 is used to intercept and filter the fly ash discharged from the exhaust port. An anti-blocking mechanism is provided inside the fly ash bin 2 to prevent the filter mechanism 203 from being blocked.

[0064] The filter mechanism 203 includes a connecting pipe 2031 and a cloth bag 2033. The connecting pipe 2031 is fixedly installed in the exhaust port. The upper end of the cloth bag 2033 is fixedly connected to the connecting pipe 2031. A plurality of annular plates 2032 are fixedly connected to the cloth bag 2033 at equal distances from top to bottom. A plurality of return springs 2034 are arranged between two adjacent annular plates 2032. A plurality of connecting ears for hanging the return springs 2034 are fixedly welded on the outer wall of the annular plate 2032. A plurality of return springs 2034 are connected between the connecting pipe 2031 and the annular plate 2032 located at the top.

[0065] The anti-blocking mechanism includes a mounting seat 2041 and a support beam 2045, both of which are fixedly mounted inside the fly ash bin 2, one end of the mounting seat 2041 is rotatably connected to a rotating rod 2042, a sector gear 2044 is fixedly connected to the rotating rod 2042, a concave guide sleeve 2046 is fixedly connected to the support beam 2045, a rack 2047 is slidably inserted into the inner side of the concave guide sleeve 2046, the sector gear 2044 can mesh with the rack 2047, and the rack 2046 is fixedly connected to the support beam 2045. The upper end of the rack 2047 is fixedly connected to the annular plate 2032 located at the bottom of the cloth bag 2033 through a plurality of connecting rods 2048, and a limit block 2043 is fixedly installed at the bottom of the rack 2047 to prevent the rack 2047 from detaching from the concave guide sleeve 2046. An anti-blocking motor 204 for driving the fan gear 2044 to rotate is arranged on the mounting seat 2041, and the rotating shaft of the anti-blocking motor 204 is fixedly connected to one end of the rotating rod 2042, and the anti-blocking motor 204 is fixedly installed on the outer wall of the fly ash bin 2.

[0066] The fly ash entering the fly ash bin 2 can be filtered by the provided cloth bag 2033, and the remaining gas is transported to the reaction tower for treatment again through the exhaust port. By starting the anti-blocking motor 204, the rotating rod 2042 can be driven to rotate, and the rotating rotating rod 2042 drives the fan gear 2044 to rotate. After the rotating fan gear 2044 engages with the rack 2047, it pushes the rack 2047 downward, and the downward moving rack 2047 gradually straightens the entire cloth bag 2033 through the connecting rod 2048. This process puts the reset spring 2034 in a stretched state. At this time, some fly ash accumulated on the cloth bag 2033 is straightened by the cloth bag 2033. The fly ash on the cloth bag 2033 is shaken off by the elastic force of the return spring 2034. The cloth bag 2033 is folded to a certain extent as the annular plate 2032 moves upward. As the rotating rod 2042 continues to rotate, the cloth bag 2033 is continuously straightened and folded. This process can quickly shake off the fly ash accumulated on the cloth bag 2033 to avoid blockage of the cloth bag 2033.

[0067] In this embodiment, a conveying pipe 3 is arranged between the discharge port of the fly ash bin 2 and the feed port of the kneading mechanism 4, and a second scraper is arranged in the conveying pipe 3. The second scraper is used to deliver the fly ash that falls from the fly ash bin 2 into the conveying pipe 3 into the interior of the kneading mechanism 4. The kneading mechanism 4 includes a kneading box 401, and a metering pump 410 is fixedly installed on the top of the kneading box 401. The liquid inlet of the metering pump 410 is connected to the storage tank for storing the concentrated liquid of the landfill leachate through a pipeline, and the liquid outlet of the metering pump 410 is connected to the interior of the kneading box 401. The internal rotation of the kneading box 401 Two rotating shafts 404 are connected, and mixing spiral blades 405 are fixedly connected to the two rotating shafts 404. The spiral rotation directions of the two mixing spiral blades 405 are opposite. A kneading motor 403 is fixedly installed on the outer wall of the kneading box 401 through a motor base 402. The rotating shaft of the kneading motor 403 is fixedly connected to one of the rotating shafts 404. Synchronous wheels 408 are fixedly connected to the two rotating shafts 404. The two synchronous wheels 408 are connected by a synchronous belt 409. A discharge pipe 407 is connected to one side of the kneading box 401, and a discharge valve is installed on the discharge pipe 407.

[0068] By adopting the above technical solution, the amount of landfill leachate concentrate added is 20% to 30% of the amount of fly ash, the landfill leachate concentrate is sucked into the kneading box 401 through the metering pump 410, and then the fly ash collected in the fly ash bin 2 is transported to the kneading box 401 through the second scraper, and then the kneading motor 403 is started, and the kneading motor 403 drives the two mixing spiral blades 405 to rotate through the synchronous wheel 408 and the synchronous belt 409. Because the spiral rotation directions of the two mixing spiral blades 405 are opposite, the mixing spiral blade 405 close to the discharge pipe 407 squeezes the material in the kneading box 401 in the direction of the kneading motor 403. The other mixing spiral blade 405 pushes the material in the direction away from the kneading motor 403, and in this reciprocating manner, the fly ash and the landfill leachate concentrate can be quickly and fully mixed. After the mixing is completed, the discharge valve is opened, and the rotating shaft of the kneading motor 403 is controlled to rotate in the opposite direction, so that the mixing spiral blade 405 close to the discharge pipe 407 discharges the mixed material from the discharge pipe 407, and the other mixing spiral blade 405 squeezes the material in the direction of the kneading motor 403. As it continues to accumulate, the material will collapse in the direction of the mixing spiral blade 405 close to the discharge pipe 407, and then the material in the kneading box 401 will be quickly pushed out.

[0069] In this embodiment, the strong alkaline properties of fly ash and the viscosity of landfill leachate concentrate are utilized to restrict most of the harmful components in the fly ash, and then the fly ash is sent to the drying section of the incineration grate furnace of the boiler 1 to achieve harmless disposal and realize resource utilization. In some embodiments, an adhesive delivery port 4011 is provided on the top of the kneading box 401. When fly ash and landfill leachate concentrate are mixed, fly ash chlorine-fixing agent, sulfur-fixing agent and adhesive can also be added to further increase the restriction strength of most of the harmful components in the fly ash.

[0070] Furthermore, an arc groove 406 corresponding to the two mixing spiral blades 405 is opened inside the kneading box 401, and the mixing spiral blades 405 are rotatably set in the arc groove 406. There is a convex setting between the two arc grooves 406. Through this setting, no gap is left between the two mixing spiral blades 405, thereby avoiding the phenomenon of mixing dead zone.

[0071] The present invention also provides a method for recycling fly ash from waste-to-energy power generation, which uses the above-mentioned waste-to-energy fly ash recycling device to recycle fly ash, and specifically includes the following steps:

[0072] S1. Fly ash collection: The fly ash and flue gas generated by the combustion of garbage in the grate of the boiler 1 are processed by the desulfurization tower 101 and the bag filter 102 in sequence, and the filtered fly ash is sent to the fly ash bin 2 for centralized collection through the first scraper and the zipper machine;

[0073] S2, mixing the landfill leachate concentrate with fly ash: the fly ash in the fly ash bin 2 is delivered to the kneading box 401 through the delivery pipe 3 and the second scraper, and then the metering pump 410 is started to deliver the landfill leachate concentrate to the kneading box 401, and then the kneading motor 403 is started to fully mix the fly ash with the landfill leachate concentrate;

[0074] S3, pelletizing: The mixed fly ash and landfill leachate concentrate are sent to a pelletizing machine 5 to be made into spherical particles, and then the spherical mixture is directly sent to the incineration grate furnace drying section of the boiler 1 through a dedicated channel for disposal.

[0075] In this embodiment, if the ball-forming effect is not ideal, in step S2, an adhesive can be added to the kneading mechanism 4, and an adhesive delivery port 4011 is provided on the top of the kneading box 401. The adhesive is at least one of polyvinyl alcohol, carboxymethyl cellulose, epoxy resin, polyurethane, and polystyrene. The added adhesive makes the fly ash and the concentrated leachate have good bonding strength, thereby improving the ball-forming effect.

[0076] In some embodiments, in step S2, the amount of landfill leachate concentrate added is 20% to 30% of the amount of fly ash.

[0077] Example 2

[0078] In this embodiment, the ball forming machine 5 includes a box body 501, a feeding port 5011 is provided on the top of the box body 501, a ball material discharge port 5012 is provided at the bottom of the box body 501, a ball forming roller 502 is rotatably installed inside the box body 501, two ball forming rollers 502 are provided, the two ball forming rollers 502 are arranged in a tubular shape, and a plurality of ball forming grooves 5021 are provided on the surface of the ball forming roller 502, both ends of the ball forming roller 502 are fixedly installed with side panels 5022, one side of the side panel 5022 is fixedly connected with a tubular shaft 5023 connected to the inside of the ball forming roller 502, and the end of the tubular shaft 5023 away from the ball forming roller 502 is rotatably passed through the box body 501 through the bearing and is arranged outside the box body 501, and the two opposite side surfaces of the box body 501 are fixedly installed There is a mounting plate 5013, and support plates 5014 are fixedly connected to the two mounting plates 5013. A driving motor 504 is fixedly installed on one of the mounting plates 5013, and a first gear 5041 is fixedly connected to the rotating shaft of the driving motor 504. A second gear 5042 is fixedly connected to the tubular shaft 5023 at one end of one of the ball forming rollers 502, and the first gear 5041 is transmission-connected to the second gear 5042 through a synchronous toothed belt 5043. A third gear 5044 is fixedly connected to the tubular shaft 5023 at one end of the two ball forming rollers 502 away from the driving motor 504, and the two third gears 5044 are meshed with each other. The ball material discharge port 5012 directly delivers the balled fly ash into the incineration grate furnace drying section of the boiler 1 through a dedicated channel.

[0079] By adopting the above technical solution, when in use, the driving motor 504 is started, thereby driving the two ball-forming rollers 502 to rotate towards each other, and the mixture of fly ash and landfill leachate concentrate entering the box body 501 is squeezed into a spherical shape by the two ball-forming grooves 5021 of the mold, and then the ball-formed fly ash is directly sent to the incineration grate drying section of the boiler 1 through the ball material discharge port 5012 via a dedicated channel.

[0080] In this embodiment, a through hole 50211 connected to the ball forming groove 5021 is provided on the ball forming roller 502. A material return mechanism 503 is provided inside the ball forming roller 502 to prevent the balled fly ash from sticking to the ball forming groove 5021. The material return mechanism 503 includes a material return rod 5031 and a plurality of columnar rods 5032. The material return rod 5031 and the columnar rod 5032 are both arranged inside the ball forming roller 502. The plurality of columnar rods 5032 are distributed in a circular array along the inner wall of the ball forming roller 502. The material return rod 5031 is located inside the circle surrounded by the plurality of columnar rods 5032. The columnar rod 5032 is in contact with the surface of the material return rod 5031. A plurality of ejecting rods 5033 are fixedly connected to the cylindrical rod 5032, and one end of the ejecting rod 5033 away from the cylindrical rod 5032 is slidably inserted into the through hole 50211, and a spring 5034 is sleeved on the ejecting rod 5033, one end of the spring 5034 is fixedly connected to the cylindrical rod 5032, and the other end of the spring 5034 is fixedly connected to the inner wall of the ball forming roller 502, and an extrusion protrusion 50311 is formed on the bottom of the ejecting rod 5031, and both ends of the ejecting rod 5031 are fixedly connected to a fixing rod 50312, and one end of the fixing rod 50312 passes through the tubular shaft 5023 and is fixedly connected to one side of the support plate 5014;

[0081] When the balling grooves 5021 on the two balling rollers 502 are molded together, the fly ash is squeezed into a ball shape in the cavity surrounded by the two balling grooves 5021. As the balling rollers 502 continue to rotate, the balling grooves 5021 rotate downward. When the balling grooves 5021 rotate to directly below the extrusion protrusions 50311, the extrusion protrusions 50311 squeeze the ejecting rod 5033 inserted on the balling grooves 5021 downward, so that the lower end of the ejecting rod 5033 extends into the balling grooves 5021, and ejects the fly ash that has been stuck in the balling grooves 5021.

[0082] By adopting the above technical solution, the phenomenon of the balled fly ash sticking in the balling groove 5021 can be effectively avoided.

[0083] The parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. A waste-to-energy fly ash recycling device, characterized in that: include: A boiler (1), wherein fly ash and flue gas generated by burning garbage in a grate of the boiler (1) are transported to a desulfurization tower (101) through a flue gas duct for treatment; The desulfurization tower (101) performs deacidification treatment on the flue gas generated by the combustion of garbage in the grate, and the collected fly ash falls into the collection pipe (103); A bag filter (102), the bag filter (102) being used to further filter fly ash from the flue gas after deacidification in the desulfurization tower (101), and the filtered fly ash falls into the collection pipe (103); a fly ash collection mechanism, the fly ash collection mechanism collecting and storing the fly ash in the collection pipe (103); A kneading mechanism (4), the kneading mechanism (4) being used to knead and stir the landfill leachate concentrate with the fly ash in the fly ash collection mechanism; A ball forming machine (5) is used to process the mixture of fly ash and landfill leachate concentrate stirred by the kneading mechanism (4) into balls, and then directly send the mixture into the incineration grate drying section of the boiler (1) through a dedicated channel.

2. The waste-to-energy fly ash recycling device according to claim 1, characterized in that: The fly ash collection mechanism comprises a fly ash bin (2), a first scraper and a zipper machine. An exhaust port is provided at the top of the fly ash bin (2). A filter mechanism (203) is arranged inside the fly ash bin (2). The filter mechanism (203) is used to intercept and filter fly ash discharged from the exhaust port. An anti-blocking mechanism is arranged inside the fly ash bin (2) to prevent the filter mechanism (203) from being blocked. The first scraper is used to scrape the fly ash in the collection pipe (103). The feed port of the zipper machine is connected to the discharge port of the first scraper machine. The discharge port of the zipper machine is connected to the inside of the fly ash bin (2). An insulation and heating device (202) is arranged outside the fly ash bin (2). The insulation and heating device (202) is used to heat and insulate the fly ash entering the fly ash bin (2) to prevent the fly ash from absorbing moisture and forming a crust and blocking the material. The outer wall of the fly ash bin (2) is provided with a vibration mechanism (201) to prevent blocking.

3. The waste-to-energy fly ash recycling device according to claim 2 is characterized in that: The filtering mechanism (203) comprises a connecting pipe (2031) and a cloth bag (2033); the connecting pipe (2031) is fixedly installed in the exhaust port; the upper end of the cloth bag (2033) is fixedly connected to the connecting pipe (2031); a plurality of annular plates (2032) are fixedly connected to the cloth bag (2033) at equal intervals from top to bottom; a plurality of return springs (2034) are arranged between two adjacent annular plates (2032); a plurality of connecting ears for hanging the return springs (2034) are fixedly welded to the outer wall of the annular plate (2032); and a plurality of return springs (2034) are connected between the connecting pipe (2031) and the annular plate (2032) located at the top.

4. The waste-to-energy fly ash recycling device according to claim 3 is characterized by: The anti-blocking mechanism comprises a mounting seat (2041) and a support beam (2045); the mounting seat (2041) and the support beam (2045) are both fixedly mounted inside the fly ash bin (2); one end of the mounting seat (2041) is rotatably connected to a rotating rod (2042); a sector gear (2044) is fixedly connected to the rotating rod (2042); a concave guide sleeve (2046) is fixedly connected to the support beam (2045); a rack (2047) is slidably inserted into the inner side of the concave guide sleeve (2046); and the sector gear (2044) is fixedly connected to the rotating rod (2042). The gear (2044) can mesh with the rack (2047); the upper end of the rack (2047) is fixedly connected to the annular plate (2032) located at the bottom of the cloth bag (2033) via a plurality of connecting rods (2048); an anti-blocking motor (204) for driving the fan-shaped gear (2044) to rotate is provided on the mounting seat (2041); the rotating shaft of the anti-blocking motor (204) is fixedly connected to one end of the rotating rod (2042); and the anti-blocking motor (204) is fixedly mounted on the outer wall of the fly ash bin (2).

5. The waste-to-energy fly ash recycling device according to claim 4 is characterized by: The kneading mechanism (4) comprises a kneading box (401), a metering pump (410) is fixedly installed on the top of the kneading box (401), a liquid inlet of the metering pump (410) is connected to a storage tank for storing landfill leachate concentrate via a pipeline, a liquid outlet of the metering pump (410) is connected to the inside of the kneading box (401), two rotating shafts (404) are rotatably connected to the inside of the kneading box (401), and mixing spiral blades (405) are fixedly connected to the two rotating shafts (404). The two mixing spiral blades (405) are connected to the mixing spiral blades (405). The spiral rotation directions of the sheet (405) are opposite. A kneading motor (403) is fixedly mounted on the outer wall of the kneading box (401) via a motor base (402). The rotating shaft of the kneading motor (403) is fixedly connected to one of the rotating shafts (404). Synchronous wheels (408) are fixedly connected to the two rotating shafts (404). The two synchronous wheels (408) are connected to each other via a synchronous belt (409). A discharge pipe (407) is connected to one side of the kneading box (401). A discharge valve is mounted on the discharge pipe (407).

6. The waste-to-energy fly ash recycling device according to claim 5, characterized in that: The kneading box (401) is provided with arc-shaped grooves (406) corresponding to the two mixing spiral blades (405) one by one. The mixing spiral blades (405) are rotatably arranged in the arc-shaped grooves (406), and a convex portion is arranged between the two arc-shaped grooves (406).

7. The waste-to-energy fly ash recycling device according to claim 6, characterized in that: A conveying pipe (3) is provided between the discharge port of the fly ash bin (2) and the feed port of the kneading mechanism (4), and a second scraper is provided in the conveying pipe (3). The second scraper is used to convey the fly ash falling from the fly ash bin (2) into the conveying pipe (3) into the interior of the kneading mechanism (4).

8. A method for recycling fly ash from waste-to-energy power generation, characterized in that: The fly ash recycling device for waste-to-energy power generation according to any one of claims 1 to 7 is used to recycle the fly ash, which specifically comprises the following steps: S1, fly ash collection: fly ash and flue gas generated by the combustion of garbage in the grate of the boiler (1) are processed in turn by the desulfurization tower (101) and the bag filter (102), and the filtered fly ash is sent to the fly ash bin (2) through the first scraper and the zipper machine for centralized collection; S2, mixing the landfill leachate concentrate with fly ash: delivering the fly ash in the fly ash bin (2) into the kneading box (401) through the delivery pipeline (3) and the second scraper, then starting the metering pump (410) to deliver the landfill leachate concentrate into the kneading box (401), and then starting the kneading motor (403) to fully mix the fly ash with the landfill leachate concentrate; S3, pelletizing: The mixed fly ash and landfill leachate concentrate are fed into a pelletizing machine (5) to be formed into spherical particles, and then the spherical mixture is directly fed into the incineration grate drying section of the boiler (1) through a dedicated channel for disposal.

9. The method for recycling fly ash from waste-to-energy according to claim 8, characterized in that: In the step S2, an adhesive is added to the kneading mechanism (4), and the adhesive is at least one of polyvinyl alcohol, carboxymethyl cellulose, epoxy resin, polyurethane, and polystyrene.

10. The method for recycling fly ash from waste-to-energy according to claim 8, characterized in that: In the step S2, the amount of the landfill leachate concentrate added is 20% to 30% of the amount of fly ash.

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