Efficient pyrolysis device for waste incineration fly ash

Abstract

This utility model discloses a high-efficiency pyrolysis device for fly ash from waste incineration, comprising: a feeding unit and a pyrolysis unit. The pyrolysis unit includes a heating section and a cooling section. The feeding unit is connected to the heating section and is used to feed fly ash into the heating section to achieve fly ash pyrolysis. The heating section is connected to the cooling section. The heating section includes a pyrolysis cylinder, which is horizontally arranged. A first spiral structure extending along the axial direction is provided on the inner wall of the pyrolysis cylinder. The first spiral structure is driven to rotate around the cylinder axis by a first driving device. A heating gas channel is wrapped around the outside of the pyrolysis cylinder. Several heating gas inlets are provided on the bottom side of the heating gas channel for connecting to an external gas heat source. Several heating gas outlets are provided on the top side of the heating gas channel, and each heating gas outlet completes gas discharge through a heating gas outlet manifold. This application achieves the decomposition of dioxins and significantly reduces the resynthesis of dioxins by dividing the pyrolysis process into a pyrolysis section and a cooling section.

Description

Technical Field

[0001] This utility model belongs to the field of hazardous waste disposal technology, and in particular relates to a high-efficiency pyrolysis device for fly ash from waste incineration. Background Technology

[0002] Fly ash from waste incineration is a fine particulate matter produced during the incineration process. It contains various harmful substances, including heavy metals (lead, cadmium, mercury, etc.), dioxins, and polycyclic aromatic hydrocarbons. Among these, dioxins are the most toxic and can cause serious harm to the environment and human health. Therefore, fly ash from waste incineration must undergo strict harmless treatment to prevent the spread of its harmful effects.

[0003] Commonly used fly ash solidification and landfill technologies are becoming increasingly difficult to implement in new projects due to the gradual implementation of the "zero landfill" policy for waste incineration fly ash and the insufficient capacity of existing fly ash landfills. The high-temperature environment of cement kiln co-processing can cause heavy metals in fly ash to volatilize, exacerbating air pollution. High-temperature melting or sintering technologies for fly ash are limited in their large-scale engineering application due to excessive energy consumption. New fly ash pyrolysis technologies can effectively decompose dioxin-like substances in fly ash without generating additional environmental problems, and have better application prospects.

[0004] Low-temperature pyrolysis of waste incineration fly ash is a technology that slowly heats waste incineration fly ash at 350-500℃, which can effectively degrade organic pollutants in fly ash. However, existing low-temperature pyrolysis reactors for fly ash have not yet been applied on a large scale in engineering projects due to the following problems: (1) the use of electric heating to centrally process waste incineration fly ash collected from various waste incineration power plants, resulting in high operating costs; (2) the pyrolysis atmosphere is not completely oxygen-free, resulting in low decomposition efficiency of dioxins; and (3) uneven heat transfer inside the device causing local coking and reduced pyrolysis efficiency. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems of the prior art and disclose a high-efficiency pyrolysis device for fly ash from waste incineration: the fly ash is pyrolyzed using the existing heat source of the waste incineration power plant, which greatly reduces the operating cost; by dividing the pyrolysis process into a pyrolysis section and a cooling section, the decomposition of dioxins is achieved and the resynthesis of dioxins is greatly reduced.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A high-efficiency pyrolysis device for waste incineration fly ash includes a feeding unit and a pyrolysis unit. The pyrolysis unit includes a heating section and a cooling section. The feeding unit is connected to the heating section and is used to feed fly ash into the heating section to achieve fly ash pyrolysis. The heating section is connected to the cooling section to cool and discharge the harmlessly treated fly ash.

[0008] The heating section includes a pyrolysis cylinder, which is horizontally arranged. The inner wall of the pyrolysis cylinder is provided with a first spiral structure extending along the axial direction. The pyrolysis cylinder is driven by a first driving device to rotate around the cylinder axis, thereby realizing the pyrolysis of the material inside the cylinder while it is being transported.

[0009] The pyrolysis cylinder is surrounded by a heating gas channel, and the pyrolysis cylinder can rotate relative to the heating gas channel. The bottom side of the heating gas channel is provided with several heating gas inlets for connecting to an external gas heat source, and the top side of the heating gas channel is provided with several heating gas outlets. Each heating gas outlet completes gas discharge through a heating gas outlet manifold.

[0010] According to a preferred embodiment, the heating gas channel is further provided with a plurality of fins, each fin being fixed to the outer wall of the pyrolysis cylinder.

[0011] According to a preferred embodiment, each heating gas outlet is provided with a damper for controlling the heating gas flow rate.

[0012] According to a preferred embodiment, the pyrolysis cylinder is further provided with a backup electric heating element on its wall for supplying heat to the pyrolysis cylinder when heating gas is not introduced or under precise test conditions.

[0013] According to a preferred embodiment, the pyrolysis cylinder is further provided with a pyrolysis cylinder kiln head cover and a pyrolysis cylinder kiln tail cover at its head and tail ends, respectively, thereby sealing the heating gas passage with the pyrolysis cylinder.

[0014] According to a preferred embodiment, the cooling section includes a cooling cylinder, which is horizontally disposed on the bottom side of the pyrolysis cylinder. The bottom end of the pyrolysis cylinder is provided with a first fly ash outlet that communicates with the head end of the cooling cylinder for fly ash transfer. The bottom end of the cooling cylinder is also provided with a second fly ash outlet for the fly ash to be discharged after cooling.

[0015] According to a preferred embodiment, the inner wall of the cooling cylinder is provided with a second spiral structure extending along the axial direction. The cooling cylinder is driven by a second driving device to rotate around the cylinder axis, thereby realizing the cooling of the material inside the cylinder while it is being transported.

[0016] The cooling cylinder is surrounded by a cooling water channel, and the cooling cylinder can rotate relative to the cooling water channel. The bottom side of the cooling water channel is provided with a cooling water inlet for connecting to an external liquid cold source, and the top side of the cooling water channel is provided with a cooling water outlet.

[0017] According to a preferred embodiment, the cooling section includes a nitrogen inlet connected to the cooling cylinder, for introducing nitrogen into the pyrolysis cylinder through the cooling cylinder to maintain an oxygen-free atmosphere in the apparatus.

[0018] According to a preferred embodiment, the head end and tail end of the cooling cylinder are respectively provided with a cooling cylinder kiln head cover and a cooling cylinder kiln tail cover, which complete the sealing of the cooling water channel and the cooling cylinder.

[0019] According to a preferred embodiment, the feeding unit includes: a fly ash silo, the top of which is provided with a fly ash inlet, and the fly ash silo is also provided with a bag filter and a weighing scale.

[0020] After incineration, the fly ash enters the fly ash silo through the fly ash inlet and is connected to the pyrolysis cylinder through the feed pipe at the bottom of the fly ash silo.

[0021] The aforementioned main solution of this utility model and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted by this utility model and for which protection is sought. Those skilled in the art, after understanding the solution of this utility model, will realize, based on existing technology and common knowledge, that there are many combinations, all of which are technical solutions to be protected by this utility model; therefore, they are not exhaustively listed here.

[0022] The beneficial effects of this utility model are:

[0023] (1) This device uses the existing heat source of the waste incineration power plant to perform in-situ pyrolysis treatment of fly ash by setting up a heating section and a cooling section, resulting in low operation and maintenance costs.

[0024] (2) This device heats fly ash by introducing nitrogen gas from the end of the cooling section and directly entering the heating section in the reverse direction. While utilizing the residual heat, it ensures an oxygen-free atmosphere, resulting in higher decomposition efficiency of dioxin-like substances in fly ash.

[0025] (3) This device enhances heat transfer by dividing the heating section into temperature zones, using multi-stage fins and spiral channels, thus avoiding coking problems and achieving efficient pyrolysis of fly ash from waste incineration. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the principle structure of the high-efficiency pyrolysis device for fly ash from waste incineration according to this utility model;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the pyrolysis cylinder and heating gas channel in the high-efficiency pyrolysis device for fly ash from waste incineration according to this utility model;

[0028] Among them, 1-fly ash inlet, 2-fly ash silo, 3-bag filter, 4-weighing meter, 5-feeding spiral structure, 11-pyrolysis cylinder, 12-pyrolysis cylinder kiln head hood, 13-pyrolysis cylinder kiln tail hood, 14-first spiral structure, 15-standby electric heat tracing, 16-pyrolysis gas outlet, 17-first drive device, 18-first fly ash outlet, 19-pyrolysis cylinder safety valve, 20-oxygen meter, 21-heating gas channel, 22-heating gas inlet, 23-heating gas outlet, 24-heating gas outlet manifold, 25-damper, 26-fin, 27-heating gas safety valve, 31-cooling cylinder, 32-cooling cylinder kiln head hood, 33-cooling cylinder kiln tail hood, 34-second spiral structure, 35-second fly ash outlet, 36-nitrogen inlet, 37-cooling water channel, 38-second drive device, 39-cooling water inlet, 40-cooling water outlet. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, it should be noted that unless otherwise specified, the specific structures, connections, positions, power sources, etc. involved in this utility model are all things that a person skilled in the art can know without creative effort based on the prior art.

[0035] Example

[0036] refer to Figure 1 As shown in the figure, a high-efficiency pyrolysis device for waste incineration fly ash is illustrated. The device includes a feeding unit and a pyrolysis unit. The pyrolysis unit includes a heating section A and a cooling section B. The feeding unit is connected to the heating section A and is used to feed fly ash into the heating section A to achieve fly ash pyrolysis. The heating section A is connected to the cooling section B to cool and discharge the harmlessly treated fly ash.

[0037] Preferably, the feeding unit includes: a fly ash silo 2, the top of the fly ash silo 2 is provided with a fly ash inlet 1, and the fly ash silo 2 is also provided with a bag filter 3 and a weighing scale 4; the fly ash after incineration enters the fly ash silo 2 through the fly ash inlet 1, and is connected to the pyrolysis cylinder 11 through the feed pipe at the bottom of the fly ash silo 2.

[0038] Preferably, the fly ash feed pipe is provided with a feed screw structure 5, and the material can be conveyed by driving the feed screw structure 5 to rotate.

[0039] Preferably, the heating section includes a pyrolysis cylinder 11, which is horizontally arranged. A heating gas channel 21 is wrapped around the outside of the pyrolysis cylinder 11. The bottom side of the heating gas channel 21 is provided with several heating gas inlets 22 for connecting to an external gas heat source. The top side of the heating gas channel 21 is provided with several heating gas outlets 23. Each heating gas outlet 23 completes the gas discharge through a heating gas outlet 23 manifold. That is, the pyrolysis cylinder 11 can be heated from all directions through the heating gas channel 21.

[0040] Furthermore, the heating gas channel 21 is also provided with a number of fins 26, each fin 26 being fixed to the outer wall of the pyrolysis cylinder 11. The fins 26 improve the heat exchange efficiency of the heating gas channel 21.

[0041] Preferably, each heating gas outlet 23 is provided with a damper 25 for controlling the heating gas flow rate and flexibly controlling the temperature inside the pyrolysis cylinder 11.

[0042] Preferably, the inner wall of the pyrolysis cylinder 11 is provided with a first spiral structure 14 extending along the axial direction. The pyrolysis cylinder 11 is driven by a first driving device 17 to rotate around the cylinder axis, thereby realizing the simultaneous conveying of materials inside the cylinder and the completion of material pyrolysis. The first driving device 17 can transmit driving force through a belt, gear rack, or other means. The pyrolysis gas generated after the decomposition of fly ash from waste incineration is discharged through the pyrolysis gas outlet 16.

[0043] Preferably, the pyrolysis cylinder 11 is also provided with a spare electric heating tracing 15 on its cylinder wall, which is used to heat the pyrolysis cylinder 11 when heating gas is not introduced or under precise test conditions.

[0044] Preferably, the pyrolysis cylinder 11 is further provided with a pyrolysis cylinder kiln head cover 12 and a pyrolysis cylinder kiln tail cover 13 at its head and tail ends, respectively, so as to seal the heating gas channel 21 with the pyrolysis cylinder 11.

[0045] Preferably, the pyrolysis cylinder 11 is equipped with a pyrolysis cylinder 11 safety valve and an oxygen meter 20 to complete the pressure control and oxygen monitoring inside the cylinder.

[0046] Preferably, the cooling section includes a cooling cylinder 31, which is horizontally arranged on the bottom side of the pyrolysis cylinder 11. The bottom end of the pyrolysis cylinder 11 is provided with a first fly ash outlet 18, which is connected to the head end of the cooling cylinder 31 for fly ash transfer. The bottom end of the cooling cylinder 31 is also provided with a second fly ash outlet 35 for fly ash discharge after cooling.

[0047] Preferably, the cooling cylinder 31 is surrounded by a cooling water channel 37, the bottom side of which is provided with a cooling water inlet 39 for connecting to an external liquid cold source, and the top side of which is provided with a cooling water outlet 40. The bottom-inlet and top-outlet design ensures sufficient contact between the cooling water and the cooling cylinder 31.

[0048] Preferably, the inner wall of the cooling cylinder 31 is provided with a second spiral structure 34 extending along the axial direction. The cooling cylinder 31 is driven by a second driving device 38 to rotate around the cylinder axis, thereby realizing the simultaneous conveying and cooling of materials inside the cylinder. The second driving device 38 can transmit driving force through a belt, gear rack, or other means.

[0049] Preferably, the cooling section B includes a nitrogen inlet 36, which is connected to the cooling cylinder 31 and is used to introduce nitrogen into the pyrolysis cylinder 11 through the cooling cylinder 31 to maintain an oxygen-free atmosphere in the device.

[0050] Preferably, the head end and tail end of the cooling cylinder 31 are respectively provided with a cooling cylinder kiln head cover 32 and a cooling cylinder kiln tail cover 33, which complete the sealing of the cooling water channel with the cooling cylinder 31.

[0051] This device utilizes existing heat sources from the waste-to-energy plant to perform in-situ pyrolysis of fly ash by incorporating heating and cooling sections, resulting in lower operating and maintenance costs. By introducing nitrogen gas from the end of the cooling section and directly into the heating section to heat the fly ash, the device maintains an oxygen-free atmosphere while utilizing waste heat, leading to higher decomposition efficiency of dioxins in the fly ash. Furthermore, the device employs temperature zoning in the heating section, multi-stage fins, and spiral channels to enhance heat transfer, preventing coking and achieving highly efficient pyrolysis of waste incineration fly ash.

[0052] Specifically, the fly ash from the waste incineration enters the fly ash silo 2 through the fly ash inlet 1, and is then conveyed into the pyrolysis cylinder 11 in the heating section. The fly ash silo 2 is equipped with a bag filter 3 and a weighing meter 4. The bag filter 3 prevents particulate matter from leaking out when the fly ash silo 2 is depressurized, and the weighing meter 4 is used for quality control when processing fly ash with different moisture contents.

[0053] The pyrolysis cylinder 11 is a rotary reactor with a spiral channel inside, which propels the fly ash forward while increasing the heat exchange area. The inclination angle of the pyrolysis cylinder 11 is adjustable from 0-2°, allowing for adjustment of the fly ash travel rate. The fly ash is heated to approximately 400°C inside the pyrolysis cylinder 11 and held for about one hour, reducing the dioxin-like substances in the fly ash from a toxicity equivalent of over 2000 ng TEQ / kg to below 50 ng TEQ / kg.

[0054] The pyrolysis cylinder 11 is a jacketed type, with an external heating gas channel 21. The heating gas channel 21 is equipped with multi-stage fins 26 to improve the heat transfer efficiency between the gas and the pyrolysis cylinder 11 and to guide the heating gas to stay in the heating gas channel 21 for a longer time.

[0055] The pyrolysis cylinder 11 employs a multi-damper segmented temperature control structure: heating gas enters from multiple heating gas inlets 22 at the bottom of the pyrolysis furnace and exits from multiple outlets at the top of the pyrolysis cylinder 11. Each inlet and outlet forms a temperature control zone, and the reaction temperature in this zone is controlled by a damper 25 located at the hot air outlet. This precisely controls the pyrolysis process in the pyrolysis furnace, ensuring a stable and controllable pyrolysis reaction. The number of heating gas inlets 22 and outlets is determined by the length of the pyrolysis cylinder 11.

[0056] The heating gas is collected by the heating gas outlet manifold 24 and discharged outside the unit to be processed in the flue gas system or steam-water system of the waste incineration power plant. Depending on the site conditions, the heating gas can be flue gas after dust removal, steam at appropriate temperature and pressure, or hot air heated by steam from the power plant.

[0057] The pyrolysis cylinder 11 is equipped with a backup electric heater to cope with special working conditions; electric heating and gas heating can be switched online. The cross-section of the heating section is as follows: Figure 2 As shown. The pyrolysis cylinder 11 is also equipped with an oxygen meter 20 to monitor the oxygen content inside the pyrolysis cylinder 11 in real time. Under normal operating conditions, the oxygen content inside the pyrolysis cylinder 11 must be kept below 1%.

[0058] Under normal operating conditions, the pyrolysis cylinder 11 is under a slightly positive pressure. Safety valves are installed on the pyrolysis cylinder 11 and the heating gas channel 21 to reduce the risk of accidents caused by excessive pressure in the pyrolysis cylinder 11 and the heating gas channel 21.

[0059] After being detoxified, the fly ash falls downwards from the fly ash outlet of the heating section into the cooling cylinder 31 of the cooling section.

[0060] The fly ash will exchange heat with the cooling water in the cooling cylinder 31, rapidly cooling down to below 80°C. This rapid cooling of the fly ash can greatly reduce the probability of resynthesis of dioxins.

[0061] Spiral lifters are installed inside the cooling section to guide the fly ash to tumble forward and cool it evenly. Cooling water enters the cooling water channel through the cooling water inlet at the front end of the cooling cylinder 31 and exits through the cooling water outlet at the rear end of the cooling cylinder 31. The cooling water is connected to the circulating water system of the waste incineration power plant.

[0062] The pyrolysis cylinder 11 uses a counter-current nitrogen-filled inert atmosphere. A nitrogen inlet is installed at the fly ash outlet of the cooling section. The nitrogen and pyrolysis gas are discharged together from the pyrolysis gas outlet 16 and treated by the flue gas purification system of the waste incineration power plant. The nitrogen is heated to above 150°C in the cooling section before entering the heating section, utilizing the waste heat while improving the decomposition efficiency of dioxins.

[0063] The pyrolysis cylinder 11 and the cooling cylinder 31 are each controlled by a number of drive devices, the number of which is determined by the length of the pyrolysis cylinder 11 and the cooling cylinder 31.

[0064] The heating and cooling sections of this device are equipped with mechanical seals, and kiln head hoods and kiln tail hoods are installed respectively. During operation, nitrogen is used to purge the mechanical seals to ensure the device is sealed.

[0065] This device can be adjusted according to the annual fly ash production of the waste incineration power plant, making it suitable for waste incineration power plants of various processing capacities.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency pyrolysis device for fly ash from waste incineration, characterized in that, The high-efficiency pyrolysis device for waste incineration fly ash includes: a feeding unit and a pyrolysis unit. The pyrolysis unit includes a heating section (A) and a cooling section (B). The feeding unit is connected to the heating section (A) and is used to feed fly ash into the heating section (A) to achieve fly ash pyrolysis. The heating section (A) is connected to the cooling section (B) to cool and discharge the harmlessly treated fly ash. The heating section (A) includes a pyrolysis cylinder (11), which is horizontally arranged. The inner wall of the pyrolysis cylinder (11) is provided with a first spiral structure (14) extending along the axial direction. The pyrolysis cylinder (11) is driven to rotate around the cylinder axis by a first driving device (17), thereby realizing the pyrolysis of the material inside the cylinder while it is being transported. The pyrolysis cylinder (11) is wrapped with a heating gas channel (21) on the outside, and the pyrolysis cylinder (11) can rotate relative to the heating gas channel (21). The bottom side of the heating gas channel (21) is provided with several heating gas inlets (22) for connecting to an external gas heat source. The top side of the heating gas channel (21) is provided with several heating gas outlets (23), and each heating gas outlet (23) completes gas discharge through a heating gas outlet manifold (24).

2. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, The heating gas channel (21) is also provided with several fins (26), and each fin (26) is fixed on the outer wall of the pyrolysis cylinder (11).

3. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, Each heating gas outlet (23) is equipped with a damper (25) for controlling the flow rate of the heating gas.

4. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, The pyrolysis cylinder (11) is also equipped with a spare electric heating element (15) on its cylinder wall, which is used to heat the pyrolysis cylinder (11) when the heating gas is not introduced or under precise test conditions.

5. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, The pyrolysis cylinder (11) is also provided with a pyrolysis cylinder kiln head cover (12) and a pyrolysis cylinder kiln tail cover (13) at its head and tail ends, respectively, and the heating gas channel (21) and the pyrolysis cylinder (11) are sealed by the pyrolysis cylinder kiln head cover (12) and the pyrolysis cylinder kiln tail cover (13).

6. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, The cooling section (B) includes a cooling cylinder (31), which is horizontally arranged on the bottom side of the pyrolysis cylinder (11). The end of the pyrolysis cylinder (11) is provided with a first fly ash outlet (18) which is connected to the head end of the cooling cylinder (31) for fly ash transfer. The tail end of the cooling cylinder (31) is also provided with a second fly ash outlet (35) for fly ash discharge after cooling.

7. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 6, characterized in that, The inner wall of the cooling cylinder (31) is provided with a second spiral structure (34) extending along the axial direction. The cooling cylinder (31) is driven to rotate around the cylinder axis by the second driving device (38), thereby realizing the cooling of the material inside the cylinder while it is being transported. The cooling cylinder (31) is wrapped with a cooling water channel (37) on the outside, and the cooling cylinder (31) can rotate relative to the cooling water channel (37). The cooling water channel (37) has a cooling water inlet (39) on the bottom side for connecting to an external liquid cold source, and a cooling water outlet (40) on the top side of the cooling water channel (37).

8. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 7, characterized in that, The cooling section (B) includes a nitrogen inlet (36), which is connected to the cooling cylinder (31) and is used to introduce nitrogen into the pyrolysis cylinder (11) through the cooling cylinder (31) to maintain an oxygen-free atmosphere in the device.

9. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 7, characterized in that, The cooling cylinder (31) is also provided with a cooling cylinder kiln head cover (32) and a cooling cylinder kiln tail cover (33) at its head and tail ends, respectively, and the cooling water channel (37) and the cooling cylinder (31) are sealed by the cooling cylinder kiln head cover (32) and the cooling cylinder kiln tail cover (33).

10. The high-efficiency pyrolysis device for waste incineration fly ash as described in claim 1, characterized in that, The feeding unit includes: a fly ash silo (2), the top of which is provided with a fly ash inlet (1), and the fly ash silo (2) is also provided with a bag filter (3) and a weighing scale (4); After incineration, the fly ash enters the fly ash silo (2) through the fly ash inlet (1) and is connected to the pyrolysis cylinder (11) through the feed pipe at the bottom of the fly ash silo (2).

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