Demineralized fly ash and fuel oil mixed back-spraying incinerator detoxification device and method

Abstract

The invention discloses a demineralized fly ash and fuel oil mixed back-spraying incinerator detoxification device and method, and belongs to the technical field of solid waste treatment.The demineralized fly ash and fuel oil mixed back-spraying incinerator detoxification device comprises a fly ash drying device, the fly ash drying device is fixed to the ground through a fixing frame, and the lower end of the fly ash drying device communicates with a flow dividing device fixed to the fixing frame; the lower portion of the flow dividing device communicates with two vertical pipes, spraying devices fixed to the fixing frame are rotationally connected to the lower portions of the two vertical pipes correspondingly, and cleaning devices fixedly connected with the fixing frame are arranged on the outer sides of the two spraying devices correspondingly. A PLC electrically connected with the fly ash drying device, the flow dividing device, the material spraying device and the cleaning device is fixed to the fixing frame, the fly ash spraying stability is improved, and then the detoxification efficiency and the detoxification effect of fly ash are improved.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, specifically to a detoxification device and method for a mixed incinerator containing desalinated fly ash and fuel oil. Background Technology

[0002] After municipal solid waste is incinerated for power generation, the fly ash collected by the flue gas purification system is rich in toxic substances such as dioxins and heavy metals, and contains a large amount of salt (chlorides), and is considered hazardous waste. Under current technology, fly ash is mainly solidified and chelated before being landfilled, which not only occupies a large amount of land but also poses environmental pollution risks. With the trend of reducing solid waste landfill rates in my country's "zero-waste city" construction, there is an urgent need to develop fly ash resource utilization technologies to remove salts from fly ash at a reasonable cost, achieve dioxin detoxification, and, under the premise of controllable heavy metal migration risks, use the desalinated and detoxified fly ash as a building material raw material.

[0003] To prevent steel reinforcement corrosion, the chlorine content of building materials must be strictly controlled. Given the water-soluble nature of chloride salts (such as sodium chloride and potassium chloride) in fly ash, washing can effectively separate these salts, reducing the chlorine content to below 1%, thus making it potentially usable as a building material raw material. The saline wastewater generated from washing can be purified and recycled using MVR evaporation crystallization processes to achieve salt recovery and water resource recycling, resulting in zero wastewater discharge.

[0004] Because dioxins are poorly soluble in water, even after desalination, fly ash still contains residual, undetoxified dioxin toxic substances, requiring high temperatures above 850℃ to decompose them. However, existing fly ash detoxification devices are energy-intensive, have low automation levels, and are difficult to operate within municipal solid waste incineration plants, often requiring cross-regional transportation. The excessively high cost of dioxin detoxification is a key reason why fly ash resource utilization technology is difficult to promote and apply. Therefore, a highly automated, low-energy-consumption on-site detoxification device that fully utilizes the thermal energy and space of municipal solid waste incineration facilities is needed to detoxify dioxins in fly ash. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a detoxification device and method for a desalination fly ash and fuel oil mixed and injected back into an incinerator.

[0006] The technical solution of the present invention is: a detoxification device for a fly ash and fuel oil mixed and injected back into an incinerator, comprising a fly ash drying device, wherein the fly ash drying device is fixed to the ground by a fixing frame, the lower end of the fly ash drying device is connected to a diversion device fixed to the fixing frame, the lower part of the diversion device is connected to two vertical pipes, and the lower part of each of the two vertical pipes is rotatably connected to a spraying device fixed to the fixing frame, and the outer side of each of the two spraying devices is provided with a cleaning device fixedly connected to the fixing frame, and a PLC controller electrically connected to the fly ash drying device, the diversion device, the spraying device, and the cleaning device is fixed on the fixing frame.

[0007] Furthermore, the fly ash drying device includes a drying chamber, a rotating motor fixedly connected to the top of the drying chamber, multiple layers of material-holding plates fixedly connected to the inner wall of the drying chamber, the material-holding plates being hollow inside, and multiple material-holding plates being sequentially connected inside by multiple sections of steam pipes, the bottom layer of material-holding plate being externally connected to the steam pipe of a waste heat boiler, the material-holding plates having multiple discharge ports, a rotating shaft rotatably connected to the center of the drying chamber and driven by the rotating motor, multiple scraper rods being provided above each layer of material-holding plates, the inner end of the scraper rods being fixedly connected to the outer wall of the rotating shaft, a spiral blade being provided below the rotating shaft, a feeding port being fixedly connected to the top of the drying chamber, and an exhaust gas treatment system being externally connected to the top right side of the drying chamber.

[0008] Explanation: After being washed and desalinated, the fly ash produced by the waste incinerator becomes moist fly ash. This moist fly ash falls onto the receiving plate. A rotating motor drives a rotating shaft, which in turn drives a scraper. The scraper evenly spreads the wet fly ash that has just fallen onto the receiving plate, while simultaneously scraping the fly ash that fell previously from the previous layer down through the discharge port to the lower receiving plate. The fly ash is dried as it moves downwards through the discharge port of the receiving plate. The heat source for drying is steam generated by the waste gas waste heat boiler of the waste incinerator. The steam enters from the lower receiving plate, flows through steam pipes to the uppermost receiving plate, and then exits. The rising high-temperature steam heats the receiving plate, and the receiving plate exchanges heat with the moist fly ash, drying the fly ash. The dried fly ash falls to the bottom of the drying chamber and is conveyed to the unloading hopper by spiral blades. This structure effectively dries the fly ash.

[0009] Furthermore, the diversion device includes a diversion chamber, the top of which is connected to the lower end of the drying chamber. A stirring motor is fixedly connected to the top side wall of the diversion chamber. A stirring rod, which is rotatably connected to the stirring motor, is rotatably connected inside the diversion chamber. Material conveying pipes are obliquely connected to the front and rear sides of the diversion chamber, and a spiral feeding rod is rotatably connected inside the material conveying pipes. A material conveying motor, which is rotatably connected to the spiral feeding rod, is fixedly connected to the side wall of the diversion chamber. A control valve, which is electrically connected to the PLC controller, is fixedly connected to the top side wall of the diversion chamber. A fuel oil pipeline is externally connected to the outer end of the control valve.

[0010] Explanation: The mixing motor in the distribution chamber drives the mixing rod to rotate, which mixes the fly ash and fuel oil entering the distribution chamber to form a thick fly ash slurry. The fly ash slurry is then transported to the vertical pipe by the screw feeder. The fly ash slurry has a certain fluidity, resulting in lower energy consumption during transportation. Compared with directly transporting dry fly ash, it is less likely to cause pipeline blockage.

[0011] Furthermore, the spraying device includes a rotating disk rotatably connected to the fixed frame, a gear ring fixed to the outer side of the rotating disk, a servo motor fixedly connected to the fixed frame, a gear connected to the gear ring for transmission fixed on the output shaft of the servo motor, a temporary storage bin fixed on the rotating disk, a fuel oil pipeline connected to the front end of the temporary storage bin, and a liquid suction pump fixed on the rotating disk connected to the rear end of the temporary storage bin via an oil supply pipe. The liquid suction pump is electrically connected to the PLC controller, and a nozzle mechanism is connected to the outlet of the liquid suction pump. An additive bin is fixedly connected to the rotating disk, and a liquid extraction pump electrically connected to the PLC controller is fixedly connected to the side wall of the additive bin. The outlet of the liquid extraction pump is connected to the nozzle mechanism via an additive pipe.

[0012] Explanation: The fuel oil in the temporary storage bin is pumped to the nozzle mechanism by the suction pump, and the emulsifier is pumped to the suspension formed by the mixture of fuel oil and fly ash slurry by the liquid extraction pump to prevent fly ash from settling in the nozzle mechanism due to gravity and causing the nozzle mechanism to become clogged.

[0013] Furthermore, the nozzle mechanism includes a spherical mixing bin, a second control valve is fixedly connected to the top of the spherical mixing bin, the upper end of the second control valve is connected to the lower end of the feeding bin through a vertical pipe, a spray pipe is connected to the rear end of the spherical mixing bin, a nozzle is connected to the rear end of the spray pipe, and a telescopic mechanism is provided between the nozzle and the outside.

[0014] Note: The flow rate of fly ash slurry entering the spherical mixing silo is controlled by control valve two.

[0015] Furthermore, the telescopic mechanism includes a sleeve that is movably fitted onto the outer wall of the nozzle and the spray pipe. Two synchronous electric cylinders electrically connected to the PLC controller are fixed to the front outer wall of the spray pipe, and the telescopic ends of the synchronous electric cylinders are fixed to the outer wall of the sleeve.

[0016] Note: The telescopic structure allows for better spraying of the fly ash and fuel oil mixture into the waste incinerator, and also prevents the fuel oil used for cleaning from splashing out of the cleaning chamber when cleaning the nozzles.

[0017] Furthermore, an ultrasonic probe electrically connected to the PLC controller is fixed inside the spray pipe.

[0018] Explanation: The ultrasonic probe generates ultrasonic vibrations, which facilitates the mixing of fly ash and fuel oil, improves the emulsification effect of the mixture, and prevents fly ash from settling and clogging the spraying pipe.

[0019] Furthermore, a pressure sensor electrically connected to the PLC controller is fixed inside the spray pipe.

[0020] Explanation: The pressure sensor detects whether the nozzle is blocked. When the nozzle is blocked, the pressure inside the spray pipe increases. The PLC controller determines that the nozzle is blocked and then cleans the nozzle. The pressure sensor helps to improve the automation level of this device.

[0021] Furthermore, the cleaning device includes a cleaning chamber, a nozzle interface on the right side of the cleaning chamber, a cleaning nozzle on the left side of the cleaning chamber, a cleaning pipe connected to the outer end of the cleaning nozzle, an oil pump electrically connected to the PLC controller at the bottom of the cleaning chamber, the outlet of the oil pump connected to the cleaning pipe, a return pump electrically connected to the PLC controller at the bottom of the cleaning chamber, the outlet of the return pump connected to a return pipe connected to the temporary storage chamber, and an oil inlet pipe connected to the temporary storage chamber on the side wall of the cleaning chamber.

[0022] Instructions: The rotating disc drives the nozzle mechanism to the cleaning chamber. The telescopic mechanism inserts the sleeve into the nozzle interface. The oil pump works to spray fuel oil from the cleaning chamber into the nozzle, softening and removing the adhesive on the outside of the nozzle, thereby clearing the nozzle. The return pump can return the fuel oil used for cleaning to the temporary storage chamber, and finally spray it into the waste incinerator through the nozzle.

[0023] Furthermore, a detoxification method for a detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator, based on the aforementioned detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator, is characterized by comprising the following steps: S1. After being washed and desalinated, the fly ash is added into the drying chamber through the feeding port. The wet fly ash falls onto the receiving plate, which is hollow and equipped with a steam channel. Steam generated by the waste heat boiler of the waste incinerator enters from the lower receiving plate, flows through the steam pipe to the uppermost receiving plate, and then exits. The rising high-temperature steam heats the receiving plate, and the receiving plate exchanges heat with the wet fly ash. The plate rotates further, driving the rotating shaft to rotate. The rotating shaft drives the scraper to rotate. The scraper spreads the wet fly ash that has just fallen onto the receiving plate evenly, and at the same time scrapes the fly ash that fell last time from the discharge port to the lower receiving plate. The dry fly ash falls into the bottom of the drying chamber and is conveyed to the discharge hopper by the spiral blades. The steam generated after heat exchange is discharged into the exhaust gas treatment system. S2. The dry fly ash falls into the distribution chamber. The stirring motor rotates, which drives the stirring rod to rotate, breaking up the fly ash agglomerates. The amount of fuel oil entering is controlled by the control valve. The stirring rod drives the fly ash and fuel oil to mix and form fly ash slurry. The fly ash slurry is transported to the vertical pipe through the spiral feed rod in the conveying pipe. S3. Fly ash slurry enters the spherical mixing bin from the vertical pipe. The suction pump pumps the fuel oil in the temporary storage bin to the spherical mixing bin. The additives in the additive bin are pumped to the nozzle mechanism by the suction pump and mixed with the fuel oil and fly ash. Then, they are sprayed out from the nozzle mechanism into the waste incinerator. S4. When the nozzle mechanism's spray position becomes clogged with scabs, the servo motor drives the gear to rotate, which in turn drives the rotating disk to rotate, causing the nozzle mechanism to detach from the waste incinerator and connect to the cleaning device. The fuel oil in the cleaning device washes and softens the outer end of the nozzle mechanism, causing the scabs to soften and fall off, thereby achieving the purpose of cleaning the nozzle mechanism. This device is equipped with two spraying devices. When one spraying device is cleaning, the other spraying device takes over the work.

[0024] The beneficial effects of this invention are: (1) The present invention achieves alternating operation through two sets of spraying devices. When one nozzle is cleaned due to blockage, the other nozzle can take over the work, thereby avoiding affecting the incineration efficiency of the waste incinerator and improving the efficiency of high-temperature detoxification of fly ash. Through mechanical mixing of the diversion device, ultrasonic vibration and emulsification of the emulsifier, the fly ash can be effectively prevented from settling in the fuel oil, improving the stability of fly ash spraying, thereby improving the detoxification efficiency and detoxification effect of fly ash. The steam generated by the waste heat boiler of the waste incinerator is used to dry the wet fly ash, which can make full use of the waste heat of the waste incineration device and effectively reduce the fly ash treatment cost.

[0025] (2) The present invention integrates the fly ash treatment device into the fuel supply device of the municipal solid waste incinerator, and ensures the residence time of fly ash in the high temperature zone of the furnace through the combustion of fuel oil, thereby improving the dioxin detoxification effect of fly ash.

[0026] (3) This invention achieves automated mixing, cleaning and spraying through a PLC controller. The fly ash is added to the incinerator through a nozzle mechanism, and the high temperature zone of the waste incinerator itself is used to decompose dioxins. The detoxified fly ash is then added to the slag. The harmless treatment of fly ash is completed within the red line of the municipal solid waste incineration plant, avoiding the potential environmental pollution risks during the transportation of fly ash as hazardous waste. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 3 This is a schematic diagram of the fly ash drying device of the present invention.

[0030] Figure 4 This is a top view showing the connection relationship between the sector plate and the scraper rod of the present invention.

[0031] Figure 5 This is a top view of the diversion chamber of the present invention.

[0032] Figure 6 This is a schematic diagram of the nozzle mechanism of the present invention from the left side.

[0033] Among them, 1-fly ash drying device, 2-fixed frame, 3-diversion device, 4-vertical pipe, 5-spraying device, 6-cleaning device, 7-PLC controller, 11-drying chamber, 12-rotating motor, 13-material receiving plate, 131-steam pipe, 132-material discharge port, 14-rotating shaft, 15-scraper rod, 16-spiral blade, 17-feeding port, 31-diversion chamber, 32-stirring motor, 33-stirring rod, 34-material conveying pipe, 35-spiral discharge rod, 36-material conveying motor, 37-control valve one, 51-rotating disc, 52-gear ring, 53-servo motor, 54- Gear, 55-Temporary storage bin, 56-Oil supply pipe, 57-Liquid suction pump, 58-Nozzle mechanism, 59-Additive bin, 591-Liquid extraction pump, 592-Additive pipe, 581-Spherical mixing bin, 582-Control valve II, 583-Spraying pipe, 584-Nozzle, 585-Telescopic mechanism, 5851-Sleeve, 5852-Synchronous electric cylinder, 586-Ultrasonic probe, 587-Pressure sensor, 61-Cleaning bin, 62-Nozzle interface, 63-Cleaning nozzle, 64-Cleaning pipe, 65-Oil extraction pump, 66-Return pump, 67-Return pipe, 68-Oil inlet pipe. Detailed Implementation

[0034] Example 1: like Figure 1As shown, a desalination device for fly ash and fuel oil mixed and injected back into an incinerator includes a fly ash drying device 1, which is fixed to the ground by a fixing frame 2. The lower end of the fly ash drying device 1 is connected to a diversion device 3 fixed to the fixing frame 2. Two vertical pipes 4 are connected below the diversion device 3. A spraying device 5, fixed to the fixing frame 2, is rotatably connected to the lower part of each of the two vertical pipes 4. A cleaning device 6, fixedly connected to the fixing frame 2, is provided on the outer side of each of the two spraying devices 5. A PLC controller 7, electrically connected to the fly ash drying device 1, the diversion device 3, the spraying device 5, and the cleaning device 6, is fixed on the fixing frame 2. The PLC controller 7 is a commercially available product; this embodiment is not limited to any particular product, as long as it can achieve the functions of this invention.

[0035] like Figure 3 , Figure 4 As shown, the fly ash drying device 1 includes a drying chamber 11. A rotary motor 12 is fixedly connected to the top of the drying chamber 11. Multiple layers of material-holding plates 13 are fixedly connected to the inner wall of the drying chamber 11. The material-holding plates 13 have hollow steam channels inside. The interiors of multiple material-holding plates 13 are connected sequentially by multiple sections of steam pipes 131. The bottom layer of material-holding plate 13 is externally connected to the steam pipe of a waste heat boiler. Multiple material-holding plates 13 have multiple material-draining ports 132. A rotating shaft 14, which is driven by the rotary motor 12, is rotatably connected to the center of the drying chamber 11. Multiple scraper rods 15 are provided above each layer of material-holding plate 13. The inner end of the scraper rod 15 is fixedly connected to the outer wall of the rotating shaft 14. Spiral blades 16 are provided below the rotating shaft 14. A feeding port 17 is fixedly connected to the top of the drying chamber 11. A tail gas treatment system is externally connected to the top right side of the drying chamber 11. The rotary motor 12 is a commercially available product. This embodiment is not limited to this product, as long as it can achieve the function of the present invention. The tail gas treatment system is existing technology and will not be described in detail here.

[0036] The fly ash produced by the waste incinerator is washed and desalinated to form moist fly ash. This moist fly ash falls onto the receiving plate 13. The rotating motor 12 drives the rotating shaft 14, which in turn drives the scraper rod 15. The scraper rod 15 evenly spreads the wet fly ash that has just fallen onto the receiving plate 13, while simultaneously scraping the previously fallen fly ash from the discharge port 132 onto the lower receiving plate 13. The fly ash is dried as it gradually moves downwards from the discharge port 132. The drying heat source is steam generated by the waste gas waste heat boiler of the waste incinerator. The steam enters from the lower receiving plate 13, flows through the steam pipe 131 to the uppermost receiving plate 13, and then exits. The rising high-temperature steam heats the receiving plate 13, and the receiving plate 13 exchanges heat with the moist fly ash, drying the fly ash. The dried fly ash falls into the bottom of the drying chamber 11 and is conveyed to the discharge hopper 3 by the spiral blades 16. This structure effectively dries the fly ash.

[0037] like Figure 5As shown, the diversion device 3 includes a diversion chamber 31. The top of the diversion chamber 31 is connected to the lower end of the drying chamber 11. A stirring motor 32 is fixedly connected to the top side wall of the diversion chamber 31. A stirring rod 33, which is rotatably connected to the stirring motor 32, is rotatably connected inside the diversion chamber 31. A conveying pipe 34 is obliquely connected to the front and rear sides of the diversion chamber 31. A screw feed rod 35 is rotatably connected inside the conveying pipe 34. A conveying motor 36, which is rotatably connected to the screw feed rod 35, is fixedly connected to the side wall of the diversion chamber 31. A control valve 37, which is electrically connected to the PLC controller 7, is fixedly connected to the top side wall of the diversion chamber 31. A fuel oil pipeline is externally connected to the outer end of the control valve 37.

[0038] The stirring motor 32 in the diversion chamber drives the stirring rod 33 to rotate, stirring the fly ash and fuel oil entering the diversion chamber 31 to form a thick fly ash slurry. The fly ash slurry is then conveyed to the vertical pipe 4 by the screw feeder 35. The fly ash slurry has a certain fluidity, resulting in lower energy consumption during conveying. Compared with directly conveying dry fly ash, it is less likely to cause pipeline blockage. The stirring motor 32, the conveying motor 36, and the control valve 37 are all commercially available products. As long as they can achieve the function of this invention, no special limitations are made here.

[0039] like Figure 2 , Figure 6 As shown, the spraying device 5 includes a rotating disk 51 rotatably connected to a fixed frame 2. A gear ring 52 is fixed to the outside of the rotating disk 51. A servo motor 53 is fixedly connected to the fixed frame 2. A gear 54, which is connected to the gear ring 52, is fixed to the output shaft of the servo motor 53. A temporary storage bin 55 is fixed on the rotating disk 51. A fuel oil pipe is connected to the front end of the temporary storage bin 55. The rear end of the temporary storage bin 55 is connected to a suction pump 57 fixed on the rotating disk 51 through an oil supply pipe 56. The suction pump 57 is electrically connected to a PLC controller 7. The outlet of the suction pump 57 is connected to a nozzle mechanism 58. An additive bin 59 is fixedly connected to the rotating disk 51. A liquid extraction pump 591, which is electrically connected to the PLC controller 7, is fixedly connected to the side wall of the additive bin 59. The outlet of the liquid extraction pump 591 is connected to the nozzle mechanism 58 through an additive pipe 592. Both the suction pump 57 and the liquid extraction pump 591 are commercially available products. As long as they can achieve the function of this invention, no special limitation is made here.

[0040] The fuel oil in the temporary storage bin 55 is pumped to the nozzle mechanism 58 by the suction pump 57, and the emulsifier is pumped to the suspension formed by the mixture of fuel oil and fly ash slurry by the pump 591 to prevent the fly ash from settling in the nozzle mechanism 58 due to gravity and causing the nozzle mechanism 58 to become clogged.

[0041] The nozzle mechanism 58 includes a spherical mixing chamber 581. A control valve 582 is fixedly connected to the upper part of the spherical mixing chamber 581. The upper end of the control valve 582 is connected to the lower end of the feeding chamber 3 through a vertical pipe 4. A spray pipe 583 is connected to the rear end of the spherical mixing chamber 581. A nozzle 584 is connected to the rear end of the spray pipe 583. A telescopic mechanism 585 is provided on the outer side of the nozzle 584. The control valve 582 is a commercially available product. As long as it can achieve the function of this invention, it is acceptable. No special limitation is made here.

[0042] The flow rate of fly ash slurry entering the spherical mixing silo 581 is controlled by control valve 2 582.

[0043] The telescopic mechanism 585 includes a sleeve 5851 that is movably fitted onto the outer wall of the nozzle 584 and the spray pipe 583. Two synchronous electric cylinders 5852 that are electrically connected to the PLC controller 7 are fixed to the front outer wall of the spray pipe 583. The telescopic ends of the synchronous electric cylinders 5852 are fixed to the outer wall of the sleeve 5851.

[0044] The telescopic structure allows for better spraying of the fly ash and fuel oil mixture into the waste incinerator, and also prevents the fuel oil used for cleaning from splashing out of the cleaning chamber 61 when cleaning the nozzle 584.

[0045] The cleaning device 6 includes a cleaning chamber 61. A nozzle interface 62 is provided on the right side of the cleaning chamber 61, and a cleaning nozzle 63 is provided on the left side of the cleaning chamber 61. The outer end of the cleaning nozzle 63 is connected to a cleaning pipe 64. An oil pump 65 electrically connected to a PLC controller 7 is provided at the bottom of the cleaning chamber 61. The outlet of the oil pump 65 is connected to the cleaning pipe 64. A return pump 66 electrically connected to the PLC controller 7 is connected at the bottom of the cleaning chamber 61. The outlet of the return pump 66 is connected to a return pipe 67 connected to a temporary storage chamber 55. An oil inlet pipe 68 connected to the temporary storage chamber 55 is connected to the side wall of the cleaning chamber 61.

[0046] Rotating the rotating disk 51 drives the nozzle mechanism 58 to turn towards the cleaning chamber 61. The telescopic mechanism 585 inserts the sleeve 5851 into the nozzle interface 62. The oil pump 65 works to spray the fuel oil in the cleaning chamber 61 into the nozzle 584, softening and removing the solidified mixture on the outside of the nozzle 584, thereby clearing the nozzle 584. The return pump 66 can return the softened mixture to the temporary storage chamber 55, and finally spray it into the waste incinerator through the nozzle 584.

[0047] Example 2: The difference between this embodiment and embodiment 1 is that, in this embodiment, an ultrasonic probe 586 electrically connected to the PLC controller 7 is fixed inside the spray pipe 583. The ultrasonic probe 586 is powered by an external power supply. The ultrasonic probe 586 is a commercially available product, as long as it can achieve the function of this invention, and no special limitation is made here.

[0048] Compared to Example 1, in this embodiment, ultrasonic vibration is generated by ultrasonic probe 586, which is beneficial for mixing fly ash and fuel oil, improves the emulsification effect of the mixture, and avoids fly ash settling and clogging of spray pipe 583.

[0049] Example 3: The difference between this embodiment and embodiment 2 is that in this embodiment, a pressure sensor 587 electrically connected to the PLC controller 7 is fixed inside the spray pipe 583. The pressure sensor 587 is a commercially available product. As long as it can achieve the function of the present invention, it is acceptable. Those skilled in the art can choose to use it based on common sense, and no special limitation is made here.

[0050] Compared to Example 2, this embodiment uses a pressure sensor to detect whether the nozzle 584 is blocked. When the nozzle 584 is blocked, the internal pressure of the spray pipe 583 increases. The PLC controller determines that the nozzle 584 is blocked and then cleans the nozzle 584. Using the pressure sensor 587 helps to improve the automation level of this device.

[0051] Example 4: This embodiment provides a detoxification method for a detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator. Based on the aforementioned detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator, the method is characterized by the following steps: S1. After being washed and desalinated, fly ash is added into the drying chamber 11 through the feeding port 17. The wet fly ash falls onto the receiving plate 13. Steam generated by the waste heat boiler of the waste incinerator enters from the lower receiving plate 13, flows through the steam pipe 131 to the uppermost receiving plate 13, and then exits. The rising high-temperature steam heats the receiving plate 13, and the receiving plate 13 exchanges heat with the wet fly ash. The rotating plate 13 further rotates, driving the rotating shaft 14 to rotate. The rotating shaft 14 rotates, driving the scraper 15 to rotate. The scraper 15 spreads the wet fly ash that has just fallen onto the receiving plate 13 evenly, and at the same time scrapes the fly ash that fell last time from the discharge port 132 onto the lower receiving plate 13. The dry fly ash falls into the bottom of the drying chamber 11 and is conveyed to the discharge chamber 3 through the spiral blades 16. The steam generated after heat exchange is discharged into the exhaust gas treatment system. S2. The dry fly ash falls into the diversion chamber 31. The stirring motor 32 rotates, driving the stirring rod 33 to rotate, breaking up the fly ash agglomerates. The amount of fuel oil entering is controlled by the control valve 37. The stirring rod 33 drives the fly ash and fuel oil to mix and form fly ash slurry. The mass of fuel oil in the fly ash slurry is 0.5 times the mass of fly ash. The fly ash slurry is conveyed to the vertical pipe 4 through the spiral feed rod 35 in the conveying pipe 34. S3. Fly ash slurry enters the spherical mixing bin 581 through the vertical pipe 4. The liquid suction pump 57 pumps the fuel oil in the temporary storage bin 55 into the spherical mixing bin 581. The additive in the additive bin 59 is pumped to the nozzle mechanism 58 by the liquid suction pump 591 and mixed with the fuel oil and fly ash. The mixture is then sprayed from the nozzle mechanism 58 into the waste incinerator. The additive is industrial grade Span-80. The mixture sprayed into the waste incinerator by the nozzle mechanism consists of the following mass percentages: 3% fly ash, 0.05% additive, and the remainder is fuel oil. S4. When the nozzle mechanism 58 is clogged with scabs at the spray position, the servo motor 53 drives the gear 54 to rotate, which in turn drives the rotating disk 51 to rotate, causing the nozzle mechanism 58 to detach from the waste incinerator and connect to the cleaning device 6. The fuel oil in the cleaning device 6 washes and softens the outer end of the nozzle mechanism 58, causing the scabs to soften and fall off, thereby achieving the purpose of cleaning the nozzle mechanism 58. This device is equipped with two spraying devices 5. When one spraying device 5 is cleaning, the other spraying device 5 takes over the work.

[0052] Example 5: The difference between this embodiment and embodiment 4 is that the mass of fuel oil in the fly ash slurry is 1 times the mass of fly ash, and the mixture injected into the waste incinerator by the nozzle mechanism consists of the following mass percentages: 18% fly ash, 2% additives, and the remainder is fuel oil.

[0053] Example 6: The difference between this embodiment and embodiment 4 is that the mass of fuel oil in the fly ash slurry is 1.5 times the mass of fly ash, and the mixture injected into the waste incinerator by the nozzle mechanism consists of the following mass percentages: 25% fly ash, 3% additives, and the remainder is fuel oil.

[0054] The synchronous electric cylinder 5852, oil pump 65, and reflux pump 66 used in the above embodiments are all commercially available products. As long as they can achieve the function of the present invention, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

Claims

1. A detoxification device for a fly ash and fuel oil mixture re-injection incinerator, characterized in that, The device includes a fly ash drying device (1), which is fixed to the ground by a fixing frame (2). The lower end of the fly ash drying device (1) is connected to a diversion device (3) fixed to the fixing frame (2). The lower part of the diversion device (3) is connected to two vertical pipes (4). The lower part of each of the two vertical pipes (4) is rotatably connected to a spraying device (5) fixed to the fixing frame (2). The outer side of each of the two spraying devices (5) is provided with a cleaning device (6) fixedly connected to the fixing frame (2). A PLC controller (7) is fixed on the fixing frame (2) and electrically connected to the fly ash drying device (1), the diversion device (3), the spraying device (5), and the cleaning device (6).

2. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 1, characterized in that, The fly ash drying device (1) includes a drying chamber (11), a rotating motor (12) is fixedly connected to the top of the drying chamber (11), and multiple layers of material holding plates (13) are fixedly connected to the inner wall of the drying chamber (11). The material holding plates (13) are hollow inside, and the interiors of multiple material holding plates (13) are connected in sequence through multiple sections of steam pipes (131). The bottom layer of material holding plate (13) is connected to the steam pipe of a waste heat boiler. Multiple material leakage ports (132) are provided on the material holding plate (13). The drying chamber (11) is rotatably connected to a rotating shaft (14) that is connected to the rotating motor (12). Each layer of material holding plate (13) is provided with multiple scraper rods (15). The inner end of the scraper rod (15) is fixedly connected to the outer wall of the rotating shaft (14). The rotating shaft (14) is provided with a spiral blade (16) below it. The top of the drying chamber (11) is fixed with a feeding port (17). The right side of the top of the drying chamber (11) is connected to an external exhaust gas treatment system.

3. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 2, characterized in that, The diversion device (3) includes a diversion chamber (31), the top of which is connected to the lower end of the drying chamber (11). A stirring motor (32) is fixedly connected to the top side wall of the diversion chamber (31). A stirring rod (33) that is rotatably connected to the stirring motor (32) is rotatably connected to the diversion chamber (31). A conveying pipe (34) is obliquely connected to the front and rear sides of the diversion chamber (31). A spiral feed rod (35) is rotatably connected to the conveying pipe (34). A conveying motor (36) that is rotatably connected to the spiral feed rod (35) is fixedly connected to the side wall of the diversion chamber (31). A control valve (37) that is electrically connected to the PLC controller (7) is fixedly connected to the top side wall of the diversion chamber (31). A fuel oil pipeline is connected to the outer end of the control valve (37).

4. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 3, characterized in that, The spraying device (5) includes a rotating disk (51) rotatably connected to the fixed frame (2), a gear ring (52) fixed on the outer side of the rotating disk (51), a servo motor (53) fixedly connected to the fixed frame (2), a gear (54) that is drivenly connected to the gear ring (52) fixed on the output shaft of the servo motor (53), a temporary storage bin (55) fixed on the rotating disk (51), a fuel oil pipeline connected to the front end of the temporary storage bin (55), and a fuel oil pipeline connected to the rear end of the temporary storage bin (55) via an oil supply pipe (56). A suction pump (57) fixed on a rotating disk (51) is connected to the PLC controller (7). The outlet of the suction pump (57) is connected to a nozzle mechanism (58). An additive chamber (59) is fixedly connected to the rotating disk (51). A pump (591) electrically connected to the PLC controller (7) is fixedly connected to the side wall of the additive chamber (59). The outlet of the pump (591) is connected to the nozzle mechanism (58) through an additive tube (592).

5. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 4, characterized in that, The nozzle mechanism (58) includes a spherical mixing bin (581), a control valve (582) is fixedly connected to the top of the spherical mixing bin (581), the upper end of the control valve (582) is connected to the lower end of the feeding bin (3) through a vertical pipe (4), the rear end of the spherical mixing bin (581) is connected to a spray pipe (583), the rear end of the spray pipe (583) is connected to a nozzle (584), and the nozzle (584) is provided with a telescopic mechanism (585) on the outside.

6. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 5, characterized in that, The telescopic mechanism (585) includes a sleeve (5851) that is movably fitted on the outer wall of the nozzle (584) and the spray pipe (583). Two synchronous electric cylinders (5852) that are electrically connected to the PLC controller (7) are fixed on the front outer wall of the spray pipe (583). The telescopic end of the synchronous electric cylinder (5852) is fixed to the outer wall of the sleeve (5851).

7. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 6, characterized in that, An ultrasonic probe (586) electrically connected to the PLC controller (7) is fixed inside the spray pipe (583).

8. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 6, characterized in that, A pressure sensor (587) electrically connected to the PLC controller (7) is fixed inside the spray pipe (583).

9. The desalination fly ash and fuel oil mixed and reinjected detoxification device for an incinerator as described in claim 6, characterized in that, A pressure sensor (587) is fixed inside the spray pipe (583).

10. A detoxification method for a detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator, based on the detoxification device for a desalination fly ash and fuel oil mixed and reinjected incinerator as described in any one of claims 5-8, characterized in that, Includes the following steps: S1. After being washed and desalted, fly ash is added into the drying chamber (11) through the feeding port (17). The wet fly ash falls onto the receiving plate (13). Steam generated by the waste heat boiler of the waste incinerator enters from the lower receiving plate (13) and flows through the steam pipe (131) to the uppermost receiving plate (13) before being discharged. The rising high-temperature steam heats the receiving plate (13). The receiving plate (13) exchanges heat with the wet fly ash. The rotating motor (12) rotates and drives the rotating shaft (14) to rotate, which in turn drives the scraper (15) to rotate. The scraper (15) spreads the wet fly ash that has just fallen onto the receiving plate (13) evenly. At the same time, the fly ash that fell last time is scraped off from the discharge port (132) to the lower receiving plate (13). The dry fly ash falls into the bottom of the drying chamber (11) and is transported to the discharge chamber (3) through the spiral blades (16). The steam generated after heat exchange is discharged into the tail gas treatment system. S2. The dry fly ash falls into the diversion bin (31). The stirring motor (32) rotates and drives the stirring rod (33) to rotate, breaking up the fly ash agglomerates. The amount of fuel oil entering is controlled by the control valve (37). The stirring rod (33) drives the fly ash and fuel oil to mix and form fly ash slurry. The fly ash slurry is transported to the vertical pipe (4) through the spiral feed rod (35) in the conveying pipe (34). S3. Fly ash slurry enters the spherical mixing bin (581) through the vertical pipe (4). The suction pump (57) pumps the fuel oil in the temporary storage bin (55) into the spherical mixing bin (581). The additives in the additive bin (59) are pumped to the nozzle mechanism (58) by the suction pump (591) and mixed with the fuel oil and fly ash. Then, the additives are sprayed out from the nozzle mechanism (58) into the waste incinerator. S4. When the nozzle mechanism (58) is clogged with scabs, the gear (54) is driven to rotate by the servo motor (53), which in turn drives the rotating disk (51) to rotate, so that the nozzle mechanism (58) is disengaged from the waste incinerator and connected to the cleaning device (6). The outer end of the nozzle mechanism (58) is softened by the fuel oil flushing in the cleaning device (6), so that the scabs are softened and fall off, thereby achieving the purpose of cleaning the nozzle mechanism (58). When one spraying device (5) is cleaning, another spraying device (5) takes over the work.

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