Bubbling fluidized bed incinerator

Abstract

A bubbling fluidized bed incinerator has a first extension direction and comprises, arranged in the first extension direction: an air chamber having a gas inlet through which gas enters the bubbling fluidized bed incinerator; the fluidized bed part is arranged above the air chamber, and solid carrier particles can be arranged in the fluidized bed part; the suspension combustion part is arranged above the fluidized bed part; the flue is arranged above the suspension combustion part; the air distribution device is arranged between the fluidized bed part and the air chamber and comprises a main body and a plurality of exhaust components arranged on the main body, the main body of the air distribution device is a conical plate, and the top end of the conical plate faces the fluidized bed part.

Description

Technical Field

[0001] The present disclosure relates to a bubbling fluidized bed incinerator. Background Art

[0002] With the development of social economy and the improvement of human living standards, the amount and types of solid waste are increasing, causing increasingly serious impacts on the environment. Solid waste treatment methods include incineration, which uses high-temperature combustion to convert solid waste into ash and flue gas to effectively reduce the volume of waste, and can also generate heat energy for power generation or heating.

[0003] In the field of solid waste disposal, such as biomass waste incineration, sludge incineration, etc., bubbling fluidized bed incinerator is a commonly used technology. Bubbling fluidized bed incinerator is an efficient reaction device that uses aerodynamic force to promote the fluidization of the bed of inert solid carrier particles (typical carriers such as quartz sand) to create favorable conditions for the reactants to fully contact with air and burn. The operation of this device depends on the uniform distribution of air in the solid particle bed, forming bubbles through specific equipment, and the bubbles flow upward in the solid particle bed to form violent turbulence, allowing the combustion reaction to proceed quickly and fully. There are two common types of bubbling fluidized bed incinerators.

[0004] In the first type of bubbling fluidized bed incinerator, fluidizing air enters from the wind chamber at the bottom of the incinerator, and is distributed through the air distribution plate (usually composed of a metal plate covered with a refractory protective layer) at the top of the wind chamber and the wind cap installed on the air distribution plate. The wind cap is a metal component with small holes. The air passes through the small holes to form a jet airflow or bubbles, which acts on the solid carrier particle bed layer to fluidize the bed layer. The wind cap is distributed at the bottom of the fluidized bed to form a point array, and is arranged according to the service area of ​​the air distribution plate to ensure that the air is always evenly distributed at the bottom of the entire fluidized bed, without being restricted by the shape and size of the fluidized bed, and can also adapt to a wide range of operating conditions. Since the air distribution plate forms a closed area under the bed layer, the slag or bed material can only be discharged through the lateral discharge port at the bottom of the bed layer. The discharged material is cooled by a water-cooled slag cooler and collected in the hopper. This discharge structure restricts the discharge of slag or bed material, for example, the slag or bed material at the bottom is difficult to discharge naturally. Therefore, this type of bubbling fluidized bed incinerator is not very suitable for biomass solid waste materials that are prone to produce slag and require frequent slag discharge.

[0005] In the second type of bubbling fluidized bed incinerator, an air distribution pipe is provided on the gas distribution plate. Fluidizing air enters the bottom of the fluidized bed through multiple air distribution pipes connected to the air main pipe. Each air distribution pipe is arranged with a number of small holes along the air flow direction. The air diffuses through the small holes to form bubbles. The bubbles flow upward in the solid carrier particle bed to form violent turbulence, so that the combustion reaction can be carried out quickly and fully. A cone bucket is provided below the air distribution pipe, and a discharge port for bed material and slag is provided at the bottom of the cone bucket. The discharged material is cooled by a water-cooled slag cooler and then collected in the hopper. This discharge structure is conducive to the natural discharge of slag or bed material. However, the method of distributing air through air distribution pipes and small holes is limited by the shape and size of the fluidized bed, such as the existence of a "dead zone" where fluidizing air cannot be provided; it is also easily affected by the expansion and displacement of the distribution pipe, so the uniformity of the air distribution is not as good and stable as the first point array type air distribution method mentioned above. At the same time, the cone bucket part below the air distribution pipe has no aerodynamic force and does not participate in fluidization, resulting in waste of the solid carrier particle bed layer. In general, the volume utilization of the fluidized bed is low.

[0006] Providing a bubbling fluidized bed incinerator that can solve the above-mentioned shortcomings is an urgent problem to be solved in the art. Summary of the invention

[0007] Therefore, the purpose of the present disclosure is to provide a bubbling fluidized bed incinerator, which has superior gas distribution, strong ability to discharge bed material and slag, good adaptability to materials, high fluidized bed volume utilization, and avoids the problem of limited waste treatment capacity.

[0008] The above objects are achieved by the bubbling fluidized bed incinerator described below.

[0009] The present disclosure provides a bubbling fluidized bed incinerator, which has a first extension direction and includes: a wind chamber arranged in the first extension direction, having a gas inlet for gas to enter the bubbling fluidized bed incinerator; a fluidized bed portion, which is arranged above the wind chamber and in which solid carrier particles can be arranged; a suspended combustion portion, which is arranged above the fluidized bed portion; a flue, which is arranged above the suspended combustion portion; and a gas distribution device, which is arranged between the fluidized bed portion and the wind chamber, and includes a main body and a plurality of exhaust components arranged on the main body, wherein the main body of the gas distribution device is a conical plate, and the top end of the conical plate faces the fluidized bed portion.

[0010] The bubbling fluidized bed incinerator according to the present disclosure may also have one or more of the following features alone or in combination.

[0011] In one embodiment, a generatrix of the conical plate forms a first angle with a second direction perpendicular to the first extension direction, and the first angle ranges from 10° to 35°.

[0012] In one embodiment, the main body of the gas distribution device is configured so that a velocity of the gas over a projection area of ​​the main body in a direction opposite to the first extension direction ranges from 0.5 m / s to 1.5 m / s.

[0013] In one embodiment, the exhaust component has a form of a hood, and the exhaust component extends along a first extension direction.

[0014] In one embodiment, the exhaust component includes a hollow cylinder and a head which are in fluid communication with each other, the hollow cylinder passes through the main body of the gas distribution device and is in fluid communication with the wind chamber, and a plurality of exhaust holes are provided on the head.

[0015] In one embodiment, the exhaust hole is disposed on a first side wall and a second side wall opposite to the head, and is inclined at a second angle relative to the second direction, and the second angle is equal to the first angle.

[0016] In one embodiment, the exhaust components are arranged such that, with respect to a projection area of ​​the main body of the gas distribution device in a direction opposite to the first extension direction, the number of the exhaust components per square meter is not less than 15.

[0017] In one embodiment, the exhaust components are evenly distributed radially on the main body of the gas distribution device.

[0018] In one embodiment, the exhaust component is fixed to the main body of the gas distribution device by welding.

[0019] In one embodiment, the bubbling fluidized bed incinerator further comprises a slag discharge assembly, and the slag discharge assembly is formed at an edge of the main body of the gas distribution device.

[0020] In one embodiment, the slag discharge assembly includes a plurality of slag discharge troughs, and the material in the bubbling fluidized bed portion can be discharged into the wind chamber through the slag discharge troughs.

[0021] In one embodiment, the slag discharge chute includes a slag discharge port that can lead to the wind chamber, and the slag discharge chute is inclined toward the slag discharge port in a direction opposite to the first extension direction.

[0022] In one embodiment, the slag discharge assembly further comprises a sliding door, which is disposed at the slag discharge port and is opened during slag discharge and isolates the wind chamber from the fluidized bed portion when closed.

[0023] In one embodiment, the wind chamber has a conical bottom plate, and the apex of the conical bottom plate is away from the fluidized bed portion.

[0024] In one embodiment, the bubbling fluidized bed incinerator further comprises a slag discharger, and the slag discharger is disposed at the apex of the conical bottom plate.

[0025] In one embodiment, a discharge air lock valve is provided at the outlet of the slag discharger to isolate the wind chamber from the external environment.

[0026] The advantages of the embodiments of the present disclosure are that the gas distribution plate of the bubbling fluidized bed incinerator of the present disclosure has a conical shape, the exhaust components are arranged so that the jet direction of the jet flow or the bubble flow is parallel to the gas distribution plate, and the slag discharge assembly is arranged at the edge of the gas distribution plate, and gravity is used to discharge bed material and slag while providing a superior gas distribution method. Therefore, it has good adaptability to materials, high volume utilization of the fluidized bed, and improved waste treatment capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The advantages and purposes of the present disclosure can be better understood from the preferred embodiments of the present disclosure described in detail below in conjunction with the accompanying drawings. In order to better show the relationship between the various components in the accompanying drawings, the accompanying drawings are not drawn to scale. In the accompanying drawings:

[0028] Figure 1 A schematic diagram of a bubbling fluidized bed incinerator according to an embodiment of the present disclosure is shown;

[0029] Figure 2 A schematic diagram showing an exhaust component of a gas distribution device of a bubbling fluidized bed incinerator according to an embodiment of the present disclosure; and

[0030] Figure 3 A schematic diagram of a gas distribution device of a bubbling fluidized bed incinerator according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in combination with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate a quantity limitation. Words such as "include", "comprise" or "have" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to the physical or mechanical connections or connections shown in the drawings, but may include connections or connections equivalent thereto, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Below, see Figures 1 to 3 Embodiments of the present disclosure are described in detail.

[0034] like Figure 1 As shown, the bubbling fluidized bed incinerator according to the present disclosure has a first extension direction S1, for example, has a substantially vertical cylindrical form, and includes a wind chamber 1, a fluidized bed portion 2, a suspended combustion portion 3, and a flue 4 arranged in the first extension direction S1. For example, the first extension direction S1 is Figure 1 The vertically upward direction in the air chamber 1. The air chamber 1 has a gas inlet 6 for gas to enter the bubbling fluidized bed incinerator, and the gas is, for example, air. The fluidized bed portion 2 is arranged above the air chamber 1 and can be provided with solid carrier particles therein, and is therefore also referred to as a bed of solid carrier particles. Solid waste is fully contacted with air and burned in the bed of solid carrier particles. For example, the fluidized bed portion 2 can be in the form of an inverted cone. The suspended combustion portion 3 is arranged above the fluidized bed portion 2, for example, in the form of a cylinder. The flue 4 is arranged above the suspended combustion portion 3, also referred to as a furnace flue, for the discharge of dust and smoke generated by combustion. The gas distribution device 5 is arranged between the fluidized bed portion 2 and the air chamber 1, and is used to distribute and transport the air in the air chamber 1 to the fluidized bed portion 2. In other words, in the first extension direction S1, the air chamber 1, the gas distribution device 5, the fluidized bed portion 2, the suspended combustion portion 3 and the flue 4 are sequentially arranged in the bubbling fluidized bed incinerator.

[0035] For example, the shell 14 of the bubbling fluidized bed incinerator is made of metal. In addition, the inner surface of the shell 14 of the bubbling fluidized bed incinerator is coated with a refractory material 15 to withstand high temperatures and prevent the shell 14 from being deformed or damaged due to high temperatures. The wind chamber 1, the gas distribution device 5, the fluidized bed part 2, the suspended combustion part 3 and the flue 4 described above are sequentially arranged in the shell 14 of the bubbling fluidized bed incinerator.

[0036] For example, the bubbling fluidized bed incinerator may further include a startup burner 7, which is disposed above the fluidized bed portion 2 and is used for heating during the startup phase of the incinerator.

[0037] For example, the bubbling fluidized bed incinerator may further include a feeding device 13, which is arranged above the fluidized bed portion 2 and is used to supply solid waste materials to be burned to the incinerator, such as Figure 1 Of course, the feeding device 13 can also be arranged in the fluidized bed part 2.

[0038] For example, the bubbling fluidized bed incinerator may further include a fuel injection gun 10, which is used to inject fuel into the fluidized bed portion 2 to assist combustion when necessary. For example, the bubbling fluidized bed incinerator may further include a fuel annulus 11, which is used to supply fuel to the fuel injection gun 10. For example, the bubbling fluidized bed incinerator may further include a process air annulus 12, which is used to supply process air to the fuel injection gun 10.

[0039] For example, the bubbling fluidized bed incinerator may further include a cooling water spray gun 8, which is disposed above the suspended combustion section 3 and is used to spray cooling water when the furnace temperature exceeds a set temperature.

[0040] Combination Figure 1 and Figure 3 As shown, the gas distribution device 5 includes a main body 30 and a plurality of exhaust components 9 arranged on the main body 30. For example, the main body 30 of the gas distribution device 5 is a conical plate, also called a gas distribution plate, and the top end of the conical plate faces the fluidized bed part 2.

[0041] like Figure 1 As shown, the generatrix of the main body 30 in the form of a conical plate forms a first angle with a second direction S2 perpendicular to the first extension direction S1, wherein the first angle is Figure 1 The θ in the figure is represented by θ, and the range is, for example, 10° to 35°, such as 10°, 20°, 30°, 35°, etc. For example, the second direction S2 can be Figure 1 In the horizontal direction, it can be toward the left or toward the right. By setting a gas distribution plate that is inclined downward from the center of the main body 30 to the furnace wall of the bubbling fluidized bed incinerator, the slag or bed material produced by the combustion can slide or roll along the slope of the inclined surface by gravity to the slag discharge trough near the furnace wall (described below). Therefore, when slag is produced, the slag can be unloaded to the slag discharge trough instead of staying on the gas distribution plate to affect the fluidization. That is to say, the bubbling fluidized bed incinerator disclosed in the present invention has a high capacity for discharging bed material and slag.

[0042] For example, the main body 30 of the gas distribution device 5 is configured so that the velocity of the gas on the projected area of ​​the main body 30 in the direction opposite to the first extension direction (ie, the vertically downward direction) ranges from 0.5 m / s to 1.5 m / s (relative to the fluidizing air flow rate at 800° C. working conditions).

[0043] For example, the main body 30 of the gas distribution device 5 is composed of a metal plate covered with a refractory protective layer, and the upper part of the main body 30 is an inert solid particle bed. Figure 2 As shown, the main body 30 includes a metal plate 21 and a refractory material layer 22 thereon. The metal plate 21 faces the wind chamber 1.

[0044] For example, the exhaust component 9 has a hood form, and the exhaust component 9 extends along a first extension direction, such as Figure 1 As shown in the enlarged schematic diagram in the circle in FIG. For example, the exhaust component 9 is made of a heat-resistant alloy material.

[0045] The hood has a mushroom-like form. Figure 2 As shown, the exhaust component 9 includes a hollow cylinder 23 and a head 24 which are in fluid communication with each other. The hollow cylinder 23 passes through the main body 30 of the gas distribution device 5 and is in fluid communication with the wind chamber 1. Figure 2 The vertical upward arrows are used to show that air flows from the air chamber 1 to the hollow cylinder 23. The head 24 is provided with a plurality of exhaust holes 20.

[0046] For example, the exhaust hole 20 is disposed on the first side wall and the second side wall opposite to each other of the head 24 of the exhaust component 9, wherein the first side wall and the second side wall are walls in the vertical direction, and the first side wall is, for example, Figure 2 The left wall of the middle, and the second wall is Figure 2 For example, the exhaust holes 20 are arranged at a second angle relative to the horizontal second direction S2, that is, the central axis of each exhaust hole 20 forms a second angle with the second direction S2, as shown by θ in the figure, and the second angle is equal to the first angle described above. Figure 2 The arrow passing through the exhaust hole 20 shows the jet direction, and it can be seen that the jet direction passing through the exhaust hole 20 on the first side wall on the left side is parallel to the main body 30 of the gas distribution device 5. The exhaust hole arranged obliquely with respect to the horizontal plane makes the jet direction of the jet flow or bubble flow formed through the exhaust hole parallel to the gas distribution plate, thereby promoting the fluidization of the solid particle bed.

[0047] For example, the exhaust components 9 are arranged such that, with respect to the projection area of ​​the main body 30 of the gas distribution device 5 in the direction opposite to the first extension direction S1 , the number of the exhaust components 9 per square meter is not less than 15.

[0048] For example, the exhaust components 9 are evenly distributed radially on the main body 30 of the gas distribution device 5, such as Figure 3 shown.

[0049] For example, the exhaust component 9 is fixed to the main body 30 of the gas distribution device 5 by welding. Figure 2 , a welding point is shown, which is located at the joint between the metal plate 21 of the main body 30 of the gas distribution device 5 and the exhaust component 9. By welding and fixing, the possibility of air leakage through the connection portion can be avoided.

[0050] The present disclosure uses a form in which the air distribution plate is above the wind chamber, so the volume utilization rate of the fluidized bed is high.

[0051] See again Figure 1 and Figure 3 The bubbling fluidized bed incinerator further includes a slag discharge assembly, which is formed at the edge of the main body 30 of the gas distribution device 5.

[0052] For example, the slag discharge assembly includes a plurality of slag discharge grooves 31, through which materials (e.g., slag, bed material) in the fluidized bed portion 2 can be discharged to the wind chamber 1. For example, the plurality of slag discharge grooves 31 are formed in a ring shape along the edge of the main body 30 of the gas distribution device 5. This arrangement allows the material to slide or roll down from the gas distribution plate to the slag discharge groove 31 at the edge by its own weight.

[0053] For example, the slag discharge groove 31 includes a slag discharge port 32 that can lead to the wind chamber 1, and in the direction opposite to the first extension direction S1, that is, in the vertical downward direction, the slag discharge groove 31 is inclined toward the slag discharge port 32. For example, four slag discharge grooves 31 are provided at the edge of the main body 30 of the gas distribution device 5. For example, the slag discharge groove 31 has a form of being high in the middle and low at both ends, and a slag discharge port 32 is provided at the low position. Figure 3 Arrows are used to schematically show that the material slides or rolls from a high place to the slag discharge port 32. For example, two or four symmetrically arranged slag discharge ports 32 are set according to the size of the bubbling fluidized bed incinerator or the amount of slag produced, and the slag or bed material can be naturally discharged to the wind chamber 1 through the slag discharge ports by its own weight.

[0054] For example, Figure 1 As shown, the slag discharge assembly further includes a sliding door 33, and the sliding door 33 is arranged at the slag discharge port 32. For example, two sets of sliding doors 33 are arranged at each slag discharge port 32. The sliding door 33 is opened during slag discharge, and isolates the wind chamber 1 and the fluidized bed portion 2 when closed.

[0055] For example, the wind chamber 1 has a conical bottom plate, and the apex of the conical bottom plate is away from the fluidized bed portion 2. For example, the conical bottom plate is made of a high-temperature resistant metal material or a metal material covered with a refractory material. This arrangement allows the discharged slag or bed material to slide or roll along the conical surface to the central area, i.e., the apex of the conical bottom, by its own weight.

[0056] like Figure 1 As shown, the bubbling fluidized bed incinerator further includes a slag discharger 16, which is disposed at the apex of the conical bottom plate.

[0057] When the fluidizing gas enters the wind chamber 1 from the gas inlet 6, the fluidizing gas cools the slag or bed material at the bottom of the wind chamber 1, and the fluidizing gas is heated to a certain extent. When the slag or bed material is cooled to the target temperature, it can be discharged from the wind chamber 1 through the slag discharger 16, thereby achieving the purpose of energy saving and consumption reduction. A discharge air lock valve 18 is provided at the outlet of the slag discharger 16, which isolates the wind chamber 1 from the external environment and prevents the fluidizing gas from leaking from the outlet of the slag discharger 16. The slag or bed material discharged by the slag discharger 16 can be collected in the hopper 17 of the bubbling fluidized bed incinerator.

[0058] The above-mentioned setting of tilting and discharging by the dead weight of materials not only improves the ability of the bubbling fluidized bed incinerator to discharge bed materials and slag, but also can be applied to different materials, and avoids the problem of limited waste treatment capacity.

[0059] The bubbling fluidized bed incinerator disclosed in the present invention has improved gas distribution plates and slag discharge components, has an excellent gas distribution method, a strong ability to discharge bed materials and slag, good adaptability to materials, a high volumetric utilization rate of the fluidized bed, and avoids the problem of limited waste treatment capacity. Therefore, it can be efficiently applied to solid waste incineration disposal, especially solid waste incineration disposal that is prone to produce slag.

[0060] In addition, the technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of disclosure to achieve the purpose of this disclosure.

Claims

1. A bubbling fluidized bed incinerator, characterized in that: The bubbling fluidized bed incinerator has a first extension direction (S1) and includes: A wind chamber (1) having a gas inlet for gas to enter the bubbling fluidized bed incinerator; A fluidized bed portion (2), which is arranged above the wind chamber and in which solid carrier particles can be arranged; A suspended combustion section (3) is arranged above the fluidized bed section; A flue (4) is arranged above the suspended combustion section; and The air distribution device (5) is arranged between the fluidized bed portion and the wind chamber, and comprises a main body (30) and a plurality of exhaust components (9) arranged on the main body. The main body (30) of the gas distribution device (5) is a conical plate, and the top end of the conical plate faces the fluidized bed portion.

2. The bubbling fluidized bed incinerator according to claim 1, characterized in that: A generatrix of the conical plate forms a first angle with a second direction perpendicular to the first extension direction, and the first angle ranges from 10° to 35°.

3. The bubbling fluidized bed incinerator according to claim 1, characterized in that: The main body (30) of the gas distribution device (5) is configured so that the velocity of the gas on a projection area of ​​the main body (30) in a direction opposite to the first extension direction ranges from 0.5 m / s to 1.5 m / s.

4. The bubbling fluidized bed incinerator according to claim 2, characterized in that: The exhaust component (9) has a hood form, and the exhaust component (9) extends along a first extension direction.

5. The bubbling fluidized bed incinerator according to claim 4, characterized in that: The exhaust component (9) comprises a hollow cylinder (23) and a head (24) which are in fluid communication with each other; the hollow cylinder (23) passes through the main body (30) of the air distribution device (5) and is in fluid communication with the air chamber (1); and a plurality of exhaust holes (20) are provided on the head (24).

6. The bubbling fluidized bed incinerator according to claim 5, characterized in that: The exhaust hole (20) is arranged on the first side wall and the second side wall opposite to each other of the head (24), and is inclined at a second angle relative to the second direction, the second angle being equal to the first angle.

7. The bubbling fluidized bed incinerator according to claim 4, characterized in that: The exhaust components (9) are configured such that, with respect to a projection area of ​​the main body (30) of the gas distribution device (5) in a direction opposite to the first extension direction, the number of the exhaust components (9) per square meter is not less than 15.

8. The bubbling fluidized bed incinerator according to claim 4, characterized in that: The exhaust components (9) are evenly distributed radially on the main body (30) of the gas distribution device (5).

9. The bubbling fluidized bed incinerator according to claim 4, characterized in that: The exhaust component (9) is fixed to the main body (30) of the gas distribution device (5) by welding.

10. The bubbling fluidized bed incinerator according to claim 1, characterized in that: The bubbling fluidized bed incinerator further comprises a slag discharge assembly, wherein the slag discharge assembly is formed at the edge of the main body (30) of the gas distribution device (5).

11. The bubbling fluidized bed incinerator according to claim 10, characterized in that: The slag discharge assembly comprises a plurality of slag discharge grooves (31), and the material in the fluidized bed portion (2) can be discharged into the wind chamber (1) through the slag discharge grooves (31).

12. The bubbling fluidized bed incinerator according to claim 10, characterized in that: The slag discharge groove (31) comprises a slag discharge port (32) capable of leading to the wind chamber (1), and the slag discharge groove (31) is inclined towards the slag discharge port (32) in a direction opposite to the first extension direction.

13. The bubbling fluidized bed incinerator according to claim 12, characterized in that: The slag discharge assembly further comprises a sliding door (33), which is arranged at the slag discharge port (32) and is opened when slag is discharged, and isolates the wind chamber (1) and the fluidized bed portion (2) when closed.

14. The bubbling fluidized bed incinerator according to claim 1, characterized in that: The wind chamber (1) has a conical bottom plate, the apex of which faces away from the fluidized bed portion (2).

15. The bubbling fluidized bed incinerator according to claim 14, characterized in that: The bubbling fluidized bed incinerator further comprises a slag discharger (16), which is arranged at the apex of the conical bottom plate.

16. The bubbling fluidized bed incinerator according to claim 15, characterized in that: A discharge air lock valve (18) is provided at the outlet of the slag discharger, which isolates the wind chamber (1) from the external environment.

Images