System for ball-milling degradation of dioxins in fly ash

Abstract

The utility model relates to a system of ball mill degrading dioxin in fly ash, it includes: stirring mixing mechanism, including first feeding port etc., first feeding port, dosing port all with the top end intercommunication of mixed box, filter pressing mechanism adopts the filter pressing mechanism of belt, and the filter pressing mechanism of belt includes second feeding port etc., and second feeding port is located one side of pre -dewatering section and receives the slurry that first discharge port discharged, drying mechanism, including combustion chamber etc., and combustion chamber is located one side of heat storage room, and the hot air outlet of combustion chamber is communicated with one end of drying cylinder, and the combustion port is located one side of the bottom end of combustion chamber, and third feeding port is located one end of drying cylinder and receives the fly ash cake that second discharge port exports, ball mill mechanism, and ball mill mechanism adopts the ball miller. The utility model improves dioxin degradation efficiency, reduces environmental risk simultaneously, does not produce secondary pollutant, realizes the efficient, low -consumption, safe degradation of fly ash dioxin finally.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration flue gas treatment technology, specifically to a system for ball milling to degrade dioxins in fly ash. Background Technology

[0002] With my country's rapid economic development and accelerated urbanization, the construction of "zero-waste cities" is also being comprehensively promoted. The scale of municipal solid waste incineration continues to expand, with an annual incineration volume exceeding 280 million tons. The total amount of fly ash generated has exceeded 12 million tons per year, accounting for more than 40% of global production. This type of fly ash is classified as hazardous waste in China, and its core risk stems from high concentrations of dioxins-like persistent organic pollutants (PCDD / Fs)—the chlorinated aromatic ring structure gives them extremely strong stability and bioaccumulation. The "New Pollutant Control Action Plan" (General Office of the State Council Document No. 15

[2022] ) clearly lists dioxins as a priority control substance, requiring a 10% reduction in emission intensity from key sources by 2025. However, the current average concentration of dioxins in fly ash still far exceeds landfill standards, posing unprecedented pressure for pollution control.

[0003] The toxic equivalent of dioxins consists of 17 chlorotricyclic aromatic hydrocarbons, among which 2,3,7,8-TCDD has the median lethal dose (LD50). 50 At a concentration of 0.6 μg / kg (rat), dioxins are classified as a Group 1 human carcinogen by the World Health Organization. In typical incinerator fly ash in my country, high-chlorinated homologues account for over 60%, and due to the spatial shielding effect of chlorine atoms, these substances are more difficult to degrade. Heavy metals in fly ash, such as lead and cadmium, also form complex pollution with dioxins, producing synergistic toxicity and further exacerbating ecological risks. Epidemiological studies have confirmed that long-term exposure to 0.1 pg TEQ / kg·d of dioxins can lead to various health problems: reproductive abnormalities (30% decrease in sperm count), immunosuppression (40% decrease in IgG antibodies), and developmental toxicity (a 2.3-fold increase in the risk of neural tube defects in fetuses). Dioxins in fly ash migrate through the "fly ash-soil-crops-animal" pathway, eventually accumulating in human adipose tissue, posing a significant public health threat.

[0004] Currently, thermal desorption, chemical oxidation, and mechanical ball milling are common fly ash treatment technologies, each with its own advantages and disadvantages. Thermal desorption uses a rotary kiln, typically requiring a high-temperature environment of 300-500℃, resulting in high energy consumption and the easy generation of chlorobenzene byproducts, with a treatment cost of 1200-1500 yuan / ton. Chemical oxidation uses persulfate activation (PS / AOPs), but the Fe2+ catalyst deactivates rapidly, requiring a dosage >10 wt%, leading to reagent costs >600 yuan / ton. Mechanical ball milling uses additive-free ball milling, resulting in a low degradation rate, and the increased temperature of the cylinder may trigger mercury volatilization, leading to high costs for secondary pollution control. Especially in high-chloride fly ash matrices, traditional technologies generally face a triple dilemma: efficiency degradation, equipment corrosion, and uncontrolled byproducts.

[0005] Chinese invention patent CN109812818A discloses a thermal treatment system for fly ash from a waste incinerator, including a flue gas sintering and melting furnace. The furnace is connected to a flue gas outlet pipe and a gas pipeline of a grate furnace. A melting chamber is located at the bottom of the furnace, with a flue gas inlet and a supplementary gas inlet on its side wall. A cyclone furnace is located above the melting chamber, and the melting chamber is connected to the cyclone furnace. A secondary air inlet is located on the side wall of the cyclone furnace. A flue gas outlet is located at the top of the furnace, connected to an exhaust gas pipe. A slag discharge port is located at the bottom of the furnace. This patented technology uses a fluidized bed cyclone melting furnace to treat fly ash from waste incineration. It achieves dioxin decomposition and heavy metal vitrification through tangential airflow cyclone sintering, and the molten slag can be utilized as a resource. Its limitations include the need for supplementary gas to maintain high temperatures, high energy consumption, and the potential generation of secondary pollutants.

[0006] In summary, the degradation technology for dioxins in incineration fly ash still faces challenges such as low efficiency, high energy consumption, and significant risk of secondary pollution. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a system for ball milling to degrade dioxins in fly ash.

[0008] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a system for ball milling to degrade dioxins in fly ash, comprising: The mixing mechanism includes a first feeding port, a dosing port, a mixing component, a mixing tank, a first water pipe, a circulating water tank, a booster pump, a first discharge port, a second water pipe, and a third water pipe. The first feeding port and the dosing port are both connected to the top of the mixing tank. The mixing component is installed on the mixing tank. The circulating water tank is connected to the top of the mixing tank through the first water pipe. The first discharge port is located on one side of the bottom of the mixing tank. The booster pump is connected to the other side of the bottom of the mixing tank through the second water pipe. The booster pump is connected to the circulating water tank through the third water pipe. The filter press mechanism is located on one side of the mixing mechanism. The filter press mechanism adopts a belt filter press. The belt filter press includes a second feeding port, a pre-dewatering section, a gravity dewatering section, a first cleaning component, a high-pressure dewatering section, a second discharge port, and a second cleaning component. The second feeding port is located on one side of the pre-dewatering section and receives the slurry discharged from the first discharge port. The pre-dewatering section is located between the gravity dewatering section and the high-pressure dewatering section. The high-pressure dewatering section is located on the other side of the pre-dewatering section. The first cleaning component is located above the high-pressure dewatering section. The second cleaning component is located below the gravity dewatering section. The second discharge port is located outside the high-pressure dewatering section. The drying mechanism includes a combustion chamber, a heat storage chamber, a hot air outlet, a combustion port, a third feeding port, a roller, a drying cylinder, a rotating assembly, and a third discharge port. The combustion chamber is located on one side of the heat storage chamber. The hot air outlet of the combustion chamber is connected to one end of the drying cylinder. The combustion port is located on one side of the bottom end of the combustion chamber. The third feeding port is located at one end of the drying cylinder and receives the fly ash cake output from the second discharge port. The third discharge port is located at the other end of the drying cylinder. The rotating assembly drives the drying cylinder to rotate. The roller is sleeved on the drying cylinder. The ball mill mechanism uses a ball mill, which includes a fourth feed port, a cylinder shell, a motor, and a third base. The fourth feed port is located at one end of the cylinder shell and receives the dried fly ash output from the third discharge port. One end of the motor is connected to the cylinder shell, and both the cylinder shell and the motor are mounted on the third base.

[0009] Preferably, a valve is provided on the first water pipe and a valve is provided on the second water pipe, and an inner lining is provided on the inner wall of the mixing tank.

[0010] Preferably, the stirring assembly includes a first motor, a first stirring shaft, a first stirring blade, a second motor, a second stirring shaft, and a second stirring blade. The first motor and the second motor are both mounted on the top of the mixing chamber. The first motor is connected to one end of the first stirring shaft, and multiple first stirring blades are fixed on the first stirring shaft. The second motor is connected to one end of the second stirring shaft, and multiple second stirring blades are fixed on the second stirring shaft. The first stirring blades and the second stirring blades are distributed alternately.

[0011] Preferably, the belt filter press further includes a tension roller, which is located on one side of the gravity dewatering section.

[0012] Preferably, both the first cleaning component and the second cleaning component adopt a structure combining spray pipes and nozzles.

[0013] Preferably, a first adjusting roller is provided on one side of the first cleaning component, and a second adjusting roller is provided on one side of the second cleaning component.

[0014] Preferably, an exhaust gas outlet is provided on the other side of the bottom of the combustion chamber.

[0015] Preferably, the rotating assembly includes a motor and a driven gear, the driven gear being sleeved on the drying cylinder and connected to the motor shaft.

[0016] Preferably, the drying mechanism further includes a first base, a second base, an abutment ring, and a stop wheel. The stop wheel is installed on the first base, the abutment ring is sleeved on the drying cylinder, and the stop wheel is installed on the second base, with the stop wheel located on the bottom side of the abutment ring.

[0017] Preferably, the height of one end of the drying cylinder is greater than the height of the other end of the drying cylinder; a cylindrical screen is provided on one side of the cylinder shell, and the cylindrical screen is installed on the third base.

[0018] Compared with the prior art, the present invention has at least the following advantages: First, this utility model improves the degradation efficiency of dioxins while reducing environmental risks and generating no secondary pollutants, ultimately achieving efficient, low-consumption, and safe degradation of dioxins in fly ash.

[0019] Second, the belt filter press also includes a tension roller, which is located on one side of the gravity dewatering section. The tension roller is used to tension multiple filter belts in the belt filter press, providing technical support for the stable operation of the gravity dewatering section, the improvement of dewatering efficiency, and the long-term reliability of the equipment. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the overall structure of the ball milling system for degrading dioxins in fly ash according to this invention.

[0022] Figure 2 This is a schematic diagram of the stirring and mixing mechanism in this utility model.

[0023] Figure 3 This is a schematic diagram of the medium-pressure filtration mechanism of this utility model.

[0024] Figure 4 This is a schematic diagram of the drying mechanism in this utility model.

[0025] Figure 5 This is a schematic diagram of the ball mill mechanism in this utility model. Detailed Implementation

[0026] In view of the shortcomings of the prior art, the inventor of this utility model has, through long-term research and extensive practice, proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and its principles in conjunction with the accompanying drawings and specific implementation examples.

[0027] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made within the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0029] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0030] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] See Figures 1 to 5 The system for ball milling to degrade dioxins in fly ash of this utility model includes: The mixing mechanism includes a first feeding port 1, a dosing port 2, a mixing component, a mixing tank 3, a first water pipe 4, a circulating water tank 5, a booster pump 6, a first discharge port 7, a second water pipe 8, and a third water pipe 111. The first feeding port 1 and the dosing port 2 are both connected to the top of the mixing tank 3. The mixing component is installed on the mixing tank 3. The circulating water tank 5 is connected to the top of the mixing tank 3 through the first water pipe 4. The first discharge port 7 is located on one side of the bottom of the mixing tank 3. The booster pump 6 is connected to the other side of the bottom of the mixing tank 3 through the second water pipe 8. The booster pump 6 is connected to the circulating water tank 5 through the third water pipe 111. The filter press mechanism is located on one side of the mixing mechanism. The filter press mechanism adopts a belt filter press. The belt filter press includes a second feeding port 11, a pre-dewatering section 12, a gravity dewatering section 14, a first cleaning component 15, a high-pressure dewatering section 17, a second discharge port 18, and a second cleaning component 19. The second feeding port 11 is located on one side of the pre-dewatering section 12 and receives the slurry discharged from the first discharge port 7. The pre-dewatering section 12 is located between the gravity dewatering section 14 and the high-pressure dewatering section 17. The high-pressure dewatering section 17 is located on the other side of the pre-dewatering section 12. The first cleaning component 15 is located above the high-pressure dewatering section 17. The second cleaning component 19 is located below the gravity dewatering section 14. The second discharge port 18 is located outside the high-pressure dewatering section 17. The drying mechanism includes a combustion chamber 21, a heat storage chamber 22, a hot air outlet 23, a combustion port 24, a third feeding port 25, a roller 26, a drying cylinder 27, a rotating assembly 28, and a third discharge port 30. The combustion chamber 21 is located on one side of the heat storage chamber 22. The hot air outlet 23 of the combustion chamber 21 is connected to one end of the drying cylinder 27. The combustion port 24 is located on one side of the bottom end of the combustion chamber 21. The third feeding port 25 is located at one end of the drying cylinder 27 and receives the fly ash cake output from the second discharge port 18. The third discharge port 30 is located at the other end of the drying cylinder 27. The rotating assembly 28 drives the drying cylinder 27 to rotate. The roller 26 is sleeved on the drying cylinder 27. The ball mill mechanism uses a ball mill, which includes a fourth feed port 31, a cylinder shell 32, a motor 34, and a third base 35. The fourth feed port 31 is located at one end of the cylinder shell 32 and receives the dried fly ash output from the third discharge port 30. One end of the motor 34 is connected to the cylinder shell 32. The cylinder shell 32 and the motor 34 are both mounted on the third base 35.

[0032] The first water pipe 4 and the second water pipe 8 are each equipped with a valve 9. The opening and closing of the valve 9 can precisely control the amount of water supplied from the circulating water tank 5 to the mixing tank 3 and the amount of water discharged from the mixing tank 3. The inner wall of the mixing tank 3 is equipped with a lining 10. The lining 10 can only allow water to pass through and prevent fly ash from leaving. The water in the mixing tank 3 can be recycled back to the circulating water tank 5 through the second water pipe 8 and the lift pump 6 for reuse, avoiding waste of water resources. In addition, it can also prevent the mixing tank 3 from being corroded and improve the service life of the mixing tank 3.

[0033] In addition, the mixing assembly includes a first motor 101, a first mixing shaft 102, a first mixing blade 103, a second motor 104, a second mixing shaft 105, and a second mixing blade 106. The first motor 101 and the second motor 104 are both installed on the top of the mixing box 3. The first motor 101 is connected to one end of the first mixing shaft 102, and multiple first mixing blades 103 are fixed on the first mixing shaft 102. The second motor 104 is connected to one end of the second mixing shaft 105, and multiple second mixing blades 106 are fixed on the second mixing shaft 105. The first mixing blades 103 and the second mixing blades 106 are staggered to ensure that the material in all areas of the mixing box 3 can be uniformly mixed, avoiding local mixing concentrations that are too high or too low (such as the appearance of "dry ash clumps" or "moisture accumulation areas" when mixing fly ash).

[0034] In this embodiment, the belt filter press also includes a tension roller 13, which is located on one side of the gravity dewatering section 14. The tension roller 13 is used to tension multiple filter belts in the belt filter press, providing technical support for the stable operation of the gravity dewatering section 14, the improvement of dewatering efficiency, and the long-term reliability of the equipment.

[0035] Furthermore, based on the above embodiments, both the first cleaning component 15 and the second cleaning component 19 can adopt a structure combining spray pipes and nozzles. This combination allows for comprehensive and uniform cleaning of the filter belt. By evenly distributing nozzles on the spray pipes, with adjacent nozzles facing in a "V" shape, the entire surface of the filter belt can be covered, ensuring that every part of the filter belt is rinsed, effectively removing sludge and impurities and improving the cleanliness of the filter belt. A first adjusting roller 16 is provided on one side of the first cleaning component 15, and a second adjusting roller 20 is provided on one side of the second cleaning component 19, used to adjust and correct any misalignment of the filter belt. An exhaust gas outlet 211 is provided on the other side of the bottom of the combustion chamber 21, facilitating the discharge of exhaust gas to a designated location for environmental protection.

[0036] Specifically, the rotating assembly 28 includes a motor and a driven gear. The driven gear is fitted onto the drying cylinder 27 and connected to the motor's shaft. The motor, as a power source, transmits power to the driven gear through the shaft. The driven gear, fitted onto the drying cylinder, provides continuous and stable rotational power to the drying cylinder, driving it to rotate and ensuring the stability of the cylinder's rotation. The drying mechanism also includes a first base 212, a second base 213, an abutment ring 214, and a retaining wheel 29. The drag wheel 26 is mounted on the first base 212, the abutment ring 214 is fitted onto the drying cylinder 27, and the retaining wheel 29 is mounted on the second base 213. The retaining wheel 29 is located on the bottom side of the abutment ring 214. The retaining wheel 29 can promptly correct the position of the abutment ring 214 when it shifts, preventing the abutment ring 214 from deviating from its normal rotational track during rotation. The drying drum 27 is inclined to the horizontal plane, that is, the height of one end (feed end) of the drying drum 27 is greater than the height of the other end (discharge end) of the drying drum 27. The sliding speed of the material under the action of gravity is about 0.2-0.5m / min. Combined with the rotation speed of the drying drum 27 of 5-10r / min, it can ensure that the material stays in the drum for 15-30 minutes (to meet the drying requirements), and will not be discharged before being fully dried due to excessive speed, or accumulate and blockage due to excessively slow speed.

[0037] In specific application scenarios, a cylindrical screen 33 is provided on one side of the shell 32. The cylindrical screen 33 is installed on the third base 35. The cylindrical screen 35 controls the discharge particle size and separates fine and coarse materials in real time. Fine materials are discharged in time to avoid over-grinding, and coarse materials are returned to the ball mill for centralized grinding, which can improve the grinding efficiency of the ball mill by 20%-30%.

[0038] The working principle of this utility model is as follows: In the S1 mixing stage, water is added from the circulating water tank 5 to the mixing tank 3 via the first water pipe 4. Fly ash enters the mixing tank 3 through the first feed port 1 and is mixed with pH adjuster (such as dilute hydrochloric acid or NaOH) added through the dosing port 2. The stirring component continuously stirs the mixture (water, fly ash, pH adjuster) to promote the dissolution and separation of soluble chloride salts in the fly ash. The slurry formed after stirring is discharged through the first discharge port 7 and enters the filter press mechanism.

[0039] S2 Dewatering Stage: In the filter press mechanism, the slurry is fed into the belt filter press through the second feed port 11. The pre-dewatering section 12 achieves preliminary solid-liquid separation, and then the material enters the gravity dewatering section 14 for further natural dewatering under the appropriate filter belt tension maintained by the tension roller 13. The first and second cleaning components, composed of spray pipes and nozzles, continuously wash the filter screen to prevent pore blockage; finally, the material is squeezed through the high-pressure dewatering section 17, reducing the moisture content to below 30%, and the resulting fly ash cake is discharged through the second discharge port 18.

[0040] S3: Drying Stage: The fly ash cake is conveyed to the drying mechanism through the third feeding port 25. The high-temperature gas generated in the combustion chamber 21 is preheated and recovered in the heat storage chamber 22, and then sent into the drying cylinder 27 through the hot air outlet 23. The trolley 26 provides support for the drying cylinder 27, and the rotating component 28 drives the drying cylinder 27 to rotate slowly to ensure uniform heating of the material. The drying process adopts multi-stage temperature control, with the temperature gradually decreasing from 300℃ to 120℃, effectively inhibiting the resynthesis of dioxins. The exhaust gas is discharged through the exhaust gas outlet 211 for treatment, and the dried fly ash is finally discharged through the third discharge port 30.

[0041] S4: Ball Milling Stage: Dried fly ash enters the cylinder 32 through the fourth feeding port 31 of the ball mill mechanism. The motor 34 drives the cylinder 32 to rotate, where Ø50 / 100mm iron grinding balls are loaded to mechanically grind the fly ash at a ball-to-material ratio of 15:1 and a filling rate of 40%, breaking down fly ash agglomerates and exposing the active sites of dioxin molecules. During this process, potassium persulfate, as an auxiliary agent, generates sulfate free radicals under mechanical activation, which directionally attack the C-Cl bonds in dioxin molecules; iron powder simultaneously provides a reducing environment, promoting the further mineralization of intermediate products into CO2 and H2O, thereby improving the dioxin degradation efficiency, reducing environmental risks, and preventing the generation of secondary pollutants, ultimately achieving efficient, low-consumption, and safe degradation of dioxins from fly ash.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A system for ball milling to degrade dioxins in fly ash, characterized in that, include: The mixing mechanism includes a first feeding port (1), a dosing port (2), a mixing component, a mixing tank (3), a first water pipe (4), a circulating water tank (5), a booster pump (6), a first discharge port (7), a second water pipe (8), and a third water pipe (111). The first feeding port (1) and the dosing port (2) are connected to the top of the mixing tank (3). The mixing component is installed on the mixing tank (3). The circulating water tank (5) is connected to the top of the mixing tank (3) through the first water pipe (4). The first discharge port (7) is located on one side of the bottom of the mixing tank (3). The booster pump (6) is connected to the other side of the bottom of the mixing tank (3) through the second water pipe (8). The booster pump (6) is connected to the circulating water tank (5) through the third water pipe (111). The filter press mechanism is located on one side of the mixing mechanism. The filter press mechanism adopts a belt filter press. The belt filter press includes a second feeding port (11), a pre-dewatering section (12), a gravity dewatering section (14), a first cleaning component (15), a high-pressure dewatering section (17), a second discharge port (18), and a second cleaning component (19). The second feeding port (11) is located on one side of the pre-dewatering section (12) and receives the slurry discharged from the first discharge port (7). The pre-dewatering section (12) is located between the gravity dewatering section (14) and the high-pressure dewatering section (17). The high-pressure dewatering section (17) is located on the other side of the pre-dewatering section (12). The first cleaning component (15) is located above the high-pressure dewatering section (17). The second cleaning component (19) is located below the gravity dewatering section (14). The second discharge port (18) is located outside the high-pressure dewatering section (17). The drying mechanism includes a combustion chamber (21), a heat storage chamber (22), a hot air outlet (23), a combustion port (24), a third feeding port (25), a trolley (26), a drying cylinder (27), a rotating assembly (28), and a third discharge port (30). The combustion chamber (21) is located on one side of the heat storage chamber (22). The hot air outlet (23) of the combustion chamber (21) is connected to one end of the drying cylinder (27). The combustion port (24) is located on one side of the bottom end of the combustion chamber (21). The third feeding port (25) is located at one end of the drying cylinder (27) and receives the fly ash cake output from the second discharge port (18). The third discharge port (30) is located at the other end of the drying cylinder (27). The rotating assembly (28) drives the drying cylinder (27) to rotate. The trolley (26) is sleeved on the drying cylinder (27). The ball mill mechanism adopts a ball mill, which includes a fourth feed port (31), a cylinder shell (32), a motor (34), and a third base (35). The fourth feed port (31) is located at one end of the cylinder shell (32) and receives the dried fly ash output from the third discharge port (30). One end of the motor (34) is connected to the cylinder shell (32), and the cylinder shell (32) and the motor (34) are both mounted on the third base (35).

2. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, A valve (9) is provided on the first water pipe (4) and the second water pipe (8), and an inner lining (10) is provided on the inner wall of the mixing box (3).

3. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The stirring assembly includes a first motor (101), a first stirring shaft (102), a first stirring blade (103), a second motor (104), a second stirring shaft (105), and a second stirring blade (106). The first motor (101) and the second motor (104) are both installed on the top of the mixing box (3). The first motor (101) is connected to one end of the first stirring shaft (102). Multiple first stirring blades (103) are fixed on the first stirring shaft (102). The second motor (104) is connected to one end of the second stirring shaft (105). Multiple second stirring blades (106) are fixed on the second stirring shaft (105). The first stirring blades (103) and the second stirring blades (106) are staggered.

4. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The belt filter press also includes a tension roller (13), which is located on one side of the gravity dewatering section (14).

5. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, Both the first cleaning component (15) and the second cleaning component (19) adopt a structure combining spray pipes and nozzles.

6. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The first cleaning assembly (15) has a first adjusting roller (16) on one side, and the second cleaning assembly (19) has a second adjusting roller (20) on one side.

7. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The combustion chamber (21) has an exhaust gas outlet (211) on the other side of its bottom end.

8. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The rotating assembly (28) includes a motor and a driven gear. The driven gear is sleeved on the drying cylinder (27) and connected to the rotating shaft of the motor.

9. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The drying mechanism also includes a first base (212), a second base (213), an abutment ring (214), and a baffle wheel (29). The drag wheel (26) is installed on the first base (212), the abutment ring (214) is sleeved on the drying cylinder (27), and the baffle wheel (29) is installed on the second base (213). The baffle wheel (29) is located on the bottom side of the abutment ring (214).

10. The system for ball milling to degrade dioxins in fly ash according to claim 1, characterized in that, The height of one end of the drying cylinder (27) is greater than the height of the other end of the drying cylinder (27); a cylindrical screen (33) is provided on one side of the cylinder shell (32), and the cylindrical screen (33) is installed on the third base (35).

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