A fly ash low temperature pyrolysis device

Abstract

The present application relates to the field of waste incineration fly ash treatment, and discloses a fly ash low-temperature pyrolysis device, comprising a thermal reaction chamber, wherein a support shaft is fixedly arranged in the thermal reaction chamber, and the outer surface of the support shaft is respectively provided with a spiral guide vane for fly ash diversion and an arc-shaped paddle plate for paddle fly ash, and a driving member is fixed on the thermal reaction chamber, and the driving member is used to drive the arc-shaped paddle plate to rotate; the present application arranges spiral guide vanes and arc-shaped paddle plates in the thermal reaction chamber, connects the spiral guide vanes and the arc-shaped paddle plates through a connecting assembly, and provides a driving member for driving the spiral guide vanes and the arc-shaped paddle plates. When the fly ash enters the thermal reaction chamber, the driving member is started to make the spiral guide vanes and the arc-shaped paddle plates rotate coaxially, so that the fly ash particles can be dispersed more evenly in the hot flue gas, thereby increasing the contact area and contact frequency between the fly ash and the hot flue gas, and improving the uniformity and efficiency of the low-temperature pyrolysis reaction.

Description

Technical Field

[0001] The present application relates to the field of waste incineration fly ash treatment, and in particular to a fly ash low-temperature pyrolysis device. Background Art

[0002] High-temperature incineration is one of the common ways to treat municipal solid waste. Fly ash produced by waste incineration is the solid residue captured after a series of purification treatments during the high-temperature incineration of municipal solid waste. These fly ashes are mainly collected by flue gas purification systems such as semi-dry method, dry method, selective non-catalytic reduction, activated carbon injection and bag filter. They contain inorganic components that are not completely burned in the original waste and compounds formed during the incineration process. Since fly ash may contain harmful substances such as heavy metals and dioxins, it is usually classified as hazardous waste and needs to be collected, stored, transported and finally safely disposed of in accordance with strict standards;

[0003] In order to reduce harmful components in fly ash, fly ash can be subjected to low-temperature pyrolysis treatment, that is, the organic pollutants in the fly ash are heated under anaerobic or micro-aerobic conditions at a relatively low temperature to crack the organic matter and convert it into small molecular gases such as carbon monoxide, hydrogen, methane, etc. and a small amount of liquid such as tar, while reducing the volume and toxicity of the fly ash. In this process, heavy metals and other toxic substances may be fixed in a more stable form, reducing the possibility of their dissolution, which is convenient for subsequent safe disposal or resource utilization;

[0004] When the existing fly ash low-temperature pyrolysis equipment is in use, "cold spots" and "hot spots" will be formed due to the uneven mixing of fly ash and hot flue gas entering the thermal reactor. At the same time, the heat in the hot flue gas cannot be evenly distributed to the fly ash, resulting in insufficient heat utilization, which in turn affects the uniformity and efficiency of the low-temperature pyrolysis reaction. In order to solve the above problems, a fly ash low-temperature pyrolysis device is proposed.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to solve the problem of waste incineration fly ash treatment, the present application provides a fly ash low-temperature pyrolysis device.

[0007] The present application provides a fly ash low-temperature pyrolysis device that adopts the following technical solution:

[0008] A fly ash low-temperature pyrolysis device comprises a thermal reaction chamber, a support shaft is fixedly arranged in the thermal reaction chamber, spiral guide blades for fly ash diversion and an arc-shaped paddle plate for moving the fly ash are respectively arranged on the outer surface of the support shaft, a driving member is fixed on the thermal reaction chamber, the driving member is used to drive the arc-shaped paddle plate to rotate, the driving member is a motor, and when the arc-shaped paddle plate rotates, the spiral guide blades are driven to rise and fall along the surface of the support shaft through a connecting component.

[0009] Preferably, a heating element is provided in the thermal reaction chamber, and the heating element is spirally provided in the thermal reaction chamber.

[0010] Preferably, the connecting assembly includes a rotating cylinder, a connecting block 1, a connecting shaft 1, a connecting shaft 2, a connecting block 2, and a connecting cylinder. The rotating cylinder is threadedly connected to the supporting shaft, the spiral guide blade is fixed on the rotating cylinder, the connecting block 1 is fixed on the rotating cylinder, one end of the connecting shaft 1 is rotatably connected to the connecting block 1, the other end of the connecting shaft 1 is rotatably connected to one end of the connecting shaft 2, the other end of the connecting shaft 2 is rotatably connected to the connecting block 2, the connecting block 2 is fixed on the connecting cylinder, the connecting cylinder is rotatably connected to the supporting shaft, and the arc-shaped shifting plate is fixed on the connecting block 2.

[0011] Preferably, a telescopic rod is fixedly arranged between the connecting block 1 and the connecting block 2.

[0012] Preferably, a conical platform is fixedly provided at the bottom of the inner wall of the thermal reaction chamber, and the other end of the support shaft is fixed to the conical platform.

[0013] Preferably, a support frame is fixed on the connecting tube, a moving brush is fixedly arranged inside the support frame, and the surface of the moving brush is in contact with the conical platform.

[0014] Preferably, a fly ash bin is fixedly provided on the thermal reaction chamber, and the fly ash bin is communicated with the inner cavity of the thermal reaction chamber.

[0015] In summary, compared with the related art, the utility model has the following beneficial effects:

[0016] By arranging spiral guide vanes and arc-shaped paddles in the thermal reaction chamber, a driving member is fixedly arranged on the thermal reaction chamber, and the driving member drives the arc-shaped paddles to rotate. When the arc-shaped paddles rotate, the spiral guide vanes are driven to rise and fall along the surface of the support shaft through the connecting components. Compared with the related technologies, the lifting and lowering of the spiral guide vanes can force the fly ash particles and the hot flue gas to generate strong shear force and eddy current, so that the fly ash particles are more evenly dispersed in the hot flue gas, and the contact area and contact frequency between the fly ash and the hot flue gas are increased. The movement of the arc-shaped paddles can further break up the gathered fly ash particles, ensuring that the fly ash particles can be fully exposed to the hot flue gas, thereby improving the uniformity and efficiency of the low-temperature pyrolysis reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a side cross-sectional structure of an embodiment of the application;

[0018] Figure 2 It is a schematic diagram of the overall structure of the embodiment of the application;

[0019] Figure 3 is a schematic structural diagram of the stirring assembly in the expanded state of the embodiment of the application;

[0020] Figure 4 It is a schematic diagram of the structure of a toggle brush according to an embodiment of the application.

[0021] Explanation of the reference numerals: 1. thermal reaction chamber; 2. heating element; 3. rotating shaft; 4. supporting shaft; 5. rotating drum; 6. spiral guide blade; 7. connecting block 1; 8. connecting shaft 1; 9. connecting shaft 2; 10. connecting block 2; 11. arc-shaped dial plate; 12. connecting drum; 13. telescopic rod; 14. conical table; 15. supporting frame; 16. dial brush; 17. motor; 18. fly ash bin. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 This application is described in further detail.

[0023] The present application discloses a fly ash low temperature pyrolysis device. Figure 1-4 A fly ash low-temperature pyrolysis device comprises a thermal reaction chamber 1, a support shaft 4 is fixedly arranged in the thermal reaction chamber 1, a rotating drum 5 is threadedly arranged on the support shaft 4, a spiral guide blade 6 is fixed on the rotating drum 5, a connecting block 7 is fixed on the rotating drum 5, a connecting cylinder 12 is rotatably arranged at the lower end of the support shaft 4, a connecting block 2 10 is fixed on the connecting cylinder 12, an arc-shaped dial plate 11 is fixed on the connecting block 2 10, a connecting shaft 1 8 is rotatably arranged on the connecting block 1 7, the other end of the connecting shaft 1 8 is rotatably connected to one end of the connecting shaft 2 9, and the other end of the connecting shaft 2 9 is rotatably connected to the connecting block 2 10, a rotating shaft 3 is rotatably arranged in the support shaft 4, a fixed block is fixed at the bottom of the rotating shaft 3, the connecting cylinder 12 is fixedly connected to the fixed block, a motor 17 is fixed on the thermal reaction chamber 1, a rotor end of the motor 17 is fixedly connected to the rotating shaft 3, and the spiral guide blade 6 and the arc-shaped dial plate 11 rotate coaxially along the central axis of the rotating shaft 3;

[0024] It should be noted that the lifting and lowering of the spiral guide blades 6 can force the fly ash particles and the hot flue gas to generate strong shear force and eddy current, so that the fly ash particles are more evenly dispersed in the hot flue gas, and the contact area and contact frequency between the fly ash and the hot flue gas are increased, thereby accelerating the heat transfer and chemical reaction process. The up and down movement of the spiral guide blades 6 can adjust the vertical distribution of the hot flue gas in the thermal reaction chamber 1, forming a more uniform temperature field and velocity field, which helps to avoid local overheating or cold spot phenomena, ensure the uniformity of temperature and gas composition in the entire thermal reaction chamber 1, and is conducive to maintaining the stability of the low-temperature heat treatment process of the fly ash;

[0025] It should be further explained that the arc-shaped paddle 11 can more naturally follow the direction of the airflow, guide the hot flue gas to flow along the arc path, help reduce the airflow resistance, make the hot flue gas smoother in the flow process, reduce eddy current loss, and improve the thermal energy utilization efficiency. When the arc-shaped paddle 11 moves the fly ash, it can provide a continuous and wide contact surface, which helps to evenly distribute the fly ash particles in the hot flue gas flow, reduce the agglomeration between the fly ash particles, increase the contact opportunity with the hot flue gas, and improve the reaction efficiency. The arc-shaped paddle 11 can help the hot flue gas form a more uniform temperature distribution in the thermal reaction chamber 1 through its curved structure, so that when the heat energy is transferred through the arc surface, it can better cover the entire reaction area, reduce local overheating or cold spots, and make the fly ash more evenly heated during the heat treatment process;

[0026] By adopting the above technical solution, the motor 17 is started, and the motor 17 can rotate forward and reverse. When the motor 17 rotates forward, the shaft 3 drives the connecting cylinder 12 and the arc-shaped dial plate 11 to rotate forward in the thermal reaction chamber 1. Under the connection of the connecting shaft 1 8 and the connecting shaft 2 9, the rotating cylinder 5 rotates upward along the supporting shaft 4, so that the spiral guide blade 6 also rotates around the central axis of the rotating shaft 3 in the thermal reaction chamber 1. When the rotating cylinder 5 rises, it pulls the connecting shaft 1 8 and the connecting shaft 2 9 to rotate, so that the arc-shaped dial plate 11 rotates while rotating. It can also be toggled up and down. When the motor 17 reverses, the rotating shaft 3 drives the connecting cylinder 12 and the arc-shaped dial plate 11 to rotate in the opposite direction in the thermal reaction chamber 1. The rotating cylinder 5 rotates downward along the supporting shaft 4, so that the spiral guide blade 6 also rotates around the central axis of the rotating shaft 3 in the thermal reaction chamber 1. When the rotating cylinder 5 descends, it pulls the connecting shaft 1 8 and the connecting shaft 2 9 to continue to rotate, so that the arc-shaped dial plate 11 can be toggled up and down while rotating, thereby making the fly ash entering the thermal reaction chamber 1 more evenly dispersed in the thermal reaction chamber 1.

[0027] Reference Figure 2 A heating element 2 is provided in the thermal reaction chamber 1, and the heating element 2 is spirally provided in the thermal reaction chamber 1; it should be noted that the heating element 2 may be an electric heating tube, the model of the electric heating tube is XY-JRB-011, and the heating temperature of the electric heating tube is between 350-550 degrees;

[0028] By adopting the above technical solution, the electric heating tube is spirally arranged in the thermal reaction chamber 1, which increases the contact area between the hot flue gas generated by the heating of the electric heating tube and the fly ash, thereby making the heat energy more evenly and effectively transferred to the fly ash, thereby promoting the rate and efficiency of the low-temperature pyrolysis reaction.

[0029] Reference Figure 2 , 3 A telescopic rod 13 is fixedly arranged between the connecting block 1 7 and the connecting block 2 10;

[0030] By adopting the above technical solution, the arrangement of the telescopic rod 13 can play a supporting role when the connecting shaft 1 8 and the connecting shaft 2 9 rotate, thereby increasing the stability of the arc-shaped shifting plate 11 when shifting.

[0031] Reference Figure 2 , 3 A conical platform 14 is fixedly provided at the bottom of the inner wall of the thermal reaction chamber 1, and the other end of the support shaft 4 is fixed to the conical platform 14;

[0032] By adopting the above technical solution, the setting of the conical platform 14 helps to guide the hot flue gas to form a stronger vortex flow when it flows upward from the bottom center of the thermal reaction chamber 1, which can more effectively mix the hot flue gas with the fly ash particles, improve the mass transfer efficiency, and make the low-temperature pyrolysis reaction more uniform and thorough. At the same time, compared with the flat-bottom design, the setting of the conical platform 14 reduces the dead corner area of ​​the thermal reaction chamber 1 and reduces the retention of fly ash at the bottom of the thermal reaction chamber 1.

[0033] Reference Figure 3 , 4 A support frame 15 is fixed on the connecting tube 12, and a tossing brush 16 is fixedly arranged in the support frame 15, and the surface of the tossing brush 16 is in contact with the conical platform 14;

[0034] By adopting the above technical solution, when the connecting tube 12 rotates, it will drive the moving brush 16 to rotate along the surface of the conical platform 14. The moving brush 16 moves the fly ash falling on the surface of the conical platform 14, thereby reducing the sedimentation time of the falling fly ash. In cooperation with the arc-shaped moving plate 11, the fly ash is fully and evenly distributed in the thermal reaction chamber 1, thereby improving the low-temperature pyrolysis efficiency of the fly ash in the thermal reaction chamber 1.

[0035] Reference Figure 1 , 2 A fly ash bin 18 is fixedly provided on the thermal reaction chamber 1, and the fly ash bin 18 is communicated with the inner cavity of the thermal reaction chamber 1;

[0036] It should be noted that a spiral blade (not shown in the figure) is provided in the fly ash bin 18 for conveying fly ash into the thermal reaction chamber 1, and an air inlet (not shown in the figure) is provided on the thermal reaction chamber 1 for injecting an inert gas such as nitrogen into the thermal reaction chamber 1, so as to maintain an oxygen-free or low-oxygen environment in the thermal reaction chamber 1 and promote the decomposition of harmful organic matter such as dioxins in the fly ash. An ash discharge valve (not shown in the figure) is also provided on the thermal reaction chamber 1 for controlling and discharging the treated fly ash.

[0037] By adopting the above technical solution, the fly ash bin 18 is used to store fly ash that needs to be subjected to low-temperature pyrolysis.

[0038] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0039] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0040] Finally: 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, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fly ash low temperature pyrolysis device, comprising a thermal reaction chamber (1), characterized in that: A support shaft (4) is fixedly arranged in the thermal reaction chamber (1), and spiral guide blades (6) for guiding fly ash and an arc-shaped shifting plate (11) for shifting fly ash are respectively arranged on the outer surface of the support shaft (4). A driving member is fixed on the thermal reaction chamber (1), and the driving member is used to drive the arc-shaped shifting plate (11) to rotate. When the arc-shaped shifting plate (11) rotates, the spiral guide blades (6) are driven to rise and fall along the surface of the support shaft (4) through a connecting component.

2. A fly ash low-temperature pyrolysis device according to claim 1, characterized in that: A heating element (2) is arranged in the thermal reaction chamber (1); the heating element (2) is arranged in a spiral shape in the thermal reaction chamber (1).

3. The fly ash low-temperature pyrolysis device according to claim 1, characterized in that: The connection assembly comprises a rotating cylinder (5), a connecting block 1 (7), a connecting shaft 1 (8), a connecting shaft 2 (9), a connecting block 2 (10), and a connecting cylinder (12); the rotating cylinder (5) is threadedly connected to the supporting shaft (4); the spiral guide blade (6) is fixed on the rotating cylinder (5); the connecting block 1 (7) is fixed on the rotating cylinder (5); one end of the connecting shaft 1 (8) is rotatably connected to the connecting block 1 (7); the other end of the connecting shaft 1 (8) is rotatably connected to one end of the connecting shaft 2 (9); the other end of the connecting shaft 2 (9) is rotatably connected to the connecting block 2 (10); the connecting block 2 (10) is fixed on the connecting cylinder (12); the connecting cylinder (12) is rotatably connected to the supporting shaft (4); and the arc-shaped shifting plate (11) is fixed on the connecting block 2 (10).

4. A fly ash low-temperature pyrolysis device according to claim 3, characterized in that: A telescopic rod (13) is fixedly arranged between the connecting block 1 (7) and the connecting block 2 (10).

5. The fly ash low-temperature pyrolysis device according to claim 1, characterized in that: A conical platform (14) is fixedly arranged at the bottom of the inner wall of the thermal reaction chamber (1), and the other end of the support shaft (4) is fixed to the conical platform (14).

6. The fly ash low-temperature pyrolysis device according to claim 3, characterized in that: A support frame (15) is fixed on the connecting tube (12), and a stirring brush (16) is fixedly arranged inside the support frame (15), and the surface of the stirring brush (16) is in contact with the conical platform (14).

7. The fly ash low-temperature pyrolysis device according to claim 3, characterized in that: A fly ash bin (18) is fixedly arranged on the thermal reaction chamber (1), and the fly ash bin (18) is communicated with the inner cavity of the thermal reaction chamber (1).

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