Slag falling pipe of garbage incinerator

Abstract

A slag inlet of a slag falling pipe body is fixedly connected with a slag outlet of the garbage incinerator, the lower portion of the slag falling pipe body is fixedly connected with the top of a slag discharging hopper, the slag outlet of the slag falling pipe body extends into the slag discharging hopper, and after slag of the garbage incinerator falls into the slag discharging hopper through the slag falling pipe body, the slag is discharged into the slag discharging hopper through the slag falling pipe body. Entering the slag extractor; the expansion joint is nested at the periphery of the slag falling pipe body, the top of the expansion joint is fixedly connected with the upper part of the slag falling pipe body, the bottom of the expansion joint is fixedly connected with the top of the slag hopper, and a sealing structure is formed in the expansion joint; when ash discharged by the garbage incinerator enters the ash falling pipe body, the ash falling pipe body and the expansion joint are both heated to expand, and the expansion joint assists in supporting the ash falling pipe body so as to prevent the ash falling pipe body from generating thermal fatigue to cause ash leakage. The slag falling pipe has the advantages of being compact in structure, easy to disassemble and assemble, remarkable in leakage-proof effect and the like, and solves the problems that an existing slag falling pipe leaks slag frequently, and the slag falling hopper is high in abrasion speed.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage incineration, and in particular relates to a slag dropping pipe of a garbage incinerator. Background Art

[0002] When the waste incineration boiler runs for a long time, the ash entering the slag pipe is discharged into the slag discharger along the slag pipe. Since the ash has a high temperature, the ash entering the slag pipe will cause the slag pipe to expand due to heat. In the long run, the thermal fatigue of the slag pipe will cause the slag pipe to leak frequently, affecting the normal operation of the waste incineration system.

[0003] Secondly, a large amount of high-temperature ash flows quickly along the slag pipe to the lower slag bucket at the bottom of the slag pipe, washing the inner wall of the lower slag bucket, causing serious wear of the lower slag bucket. Due to the fast slag flow speed, the lower slag bucket wears quickly and the replacement cycle is short, affecting the long-term operation of the slag discharger. During operation, due to the high failure rate of slag falling components, the failure rate of the slag discharge system is high and the replacement of vulnerable equipment is frequent, which seriously affects the ability of the waste incineration boiler to operate at high load and for a long period of time. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a garbage incinerator slag pipe with a compact structure, easy disassembly and assembly, and significant leakage prevention effect, in view of the problems of frequent slag leakage and rapid wear of the lower slag bucket in the existing slag pipe. To achieve the above purpose, the utility model can adopt the following technical solutions:

[0005] A slag dropping pipe for a waste incinerator comprises: a slag dropping pipe body, an expansion joint and a lower slag hopper; the slag inlet of the slag dropping pipe body is connected and fixed to the slag outlet of the waste incinerator, the lower part of the slag dropping pipe body is connected and fixed to the top of the lower slag hopper, and the slag outlet of the slag dropping pipe body extends to the inside of the lower slag hopper, and the ash from the waste incinerator falls into the lower slag hopper through the slag dropping pipe body and then enters a slag discharger; the expansion joint is nested in the outer periphery of the slag dropping pipe body, the top of the expansion joint is connected and fixed to the upper part of the slag dropping pipe body, the bottom of the expansion joint is connected and fixed to the top of the lower slag hopper, and a sealing structure is formed inside the expansion joint; when the ash discharged from the waste incinerator enters the slag dropping pipe body, the slag dropping pipe body and the expansion joint are both heated and expanded, and the expansion joint provides auxiliary support for the slag dropping pipe body to prevent the slag dropping pipe body from thermal fatigue and slag leakage.

[0006] As a further improvement of the utility model, the lower hopper is provided with grabbing nails and anti-wear lining, the grabbing nails are welded to the inner wall of the lower hopper, the anti-wear lining is built along the inner wall of the lower hopper, and the grabbing nails are wrapped inside the anti-wear lining.

[0007] As a further improvement of the utility model, the upper part of the anti-wear lining is inclined toward the central axis of the lower slag bucket to drain the fallen slag, and the lower part of the anti-wear lining is arranged in the vertical direction.

[0008] As a further improvement of the utility model, the top of the anti-wear lining is located at the midpoint of the side wall of the lower slag hopper, and the bottom of the anti-wear lining is located at the slag outlet of the lower slag hopper.

[0009] As a further improvement of the utility model, the expansion joint includes a supporting corrugated node and a refractory layer, and the refractory layer is filled inside the supporting corrugated node; the top of the supporting corrugated node is welded to the upper part of the slag dropping pipe body, and the bottom of the expansion joint is welded to the top of the lower slag bucket, and the supporting corrugated node can expand and contract.

[0010] As a further improvement of the utility model, the supporting corrugated node is made of stainless steel material, and the refractory layer is made of refractory fiber blanket.

[0011] Compared with the prior art, the advantages of the utility model are:

[0012] The utility model relates to a slag dropping pipe for a garbage incinerator, which connects and fixes the lower part of a slag dropping pipe body with a lower slag bucket, and the slag outlet of the slag dropping pipe body extends to the inside of the lower slag bucket. After the ash from the garbage incinerator falls into the lower slag bucket through the slag dropping pipe body, it enters the slag discharger, thereby preventing the ash with a certain pressure discharged from the garbage incinerator from being directly sprayed into the slag discharger, thereby improving the safety of slag dropping. Furthermore, an expansion joint is nested on the outer periphery of the slag dropping pipe body, and the two ends of the expansion joint are respectively connected and fixed to the slag dropping pipe body and the lower slag bucket, thereby forming a sealing structure inside the expansion joint, thereby preventing the positive pressure ash from rushing into the expansion joint and causing the expansion joint to overheat, thereby effectively extending the service life of the expansion joint. When the ash discharged from the garbage incinerator enters the slag dropping pipe body, the slag dropping pipe body and the expansion joint are both heated and expanded, and the expansion joint is used to provide auxiliary support for the slag dropping pipe body, thereby effectively preventing the slag dropping pipe body from generating thermal fatigue and leaking slag, thereby extending the service life of the slag dropping pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structural principle of a slag dropping pipe of a garbage incinerator in a specific embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the structural principle of the lower slag bucket in a specific embodiment of the utility model;

[0015] Legend: 1. Slag drop pipe body; 2. Expansion joint; 21. Support corrugated node; 22. Refractory layer; 3. Slag hopper; 4. Grabbing nails; 5. Anti-wear lining. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0017] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0019] Example

[0020] like Figure 1 and Figure 2 As shown, the slag pipe of a waste incinerator of the utility model comprises: a slag pipe body 1, an expansion joint 2 and a lower slag bucket 3. The slag inlet of the slag pipe body 1 is connected and fixed to the slag outlet of the waste incinerator, the lower part of the slag pipe body 1 is connected and fixed to the top of the lower slag bucket 3, and the slag outlet of the slag pipe body 1 extends to the inside of the lower slag bucket 3. After the ash of the waste incinerator falls into the lower slag bucket 3 through the slag pipe body 1, it enters the slag discharger. The expansion joint 2 is nested in the outer periphery of the slag pipe body 1, the top of the expansion joint 2 is connected and fixed to the upper part of the slag pipe body 1, the bottom of the expansion joint 2 is connected and fixed to the top of the lower slag bucket 3, and a sealing structure is formed inside the expansion joint 2. When the ash discharged from the waste incinerator enters the slag pipe body 1, the slag pipe body 1 and the expansion joint 2 are both heated and expanded, and the expansion joint 2 supports the slag pipe body 1. The expansion joint 2 can prevent the slag pipe body 1 from bursting due to excessive thermal expansion, prevent the slag pipe body 1 from thermal fatigue and slag leakage, and play a role in protecting the slag pipe body 1.

[0021] In this embodiment, by connecting and fixing the lower part of the slag pipe body 1 to the lower slag bucket 3, and the slag outlet of the slag pipe body 1 extends to the inside of the lower slag bucket 3, the ash from the garbage incinerator falls into the lower slag bucket 3 through the slag pipe body 1, and then enters the slag discharger, which avoids the ash with a certain pressure discharged from the garbage incinerator from being directly sprayed into the slag discharger, thereby improving the safety of slag dropping. Furthermore, an expansion joint 2 is nested on the outer periphery of the slag pipe body 1, and the two ends of the expansion joint 2 are respectively connected and fixed to the slag pipe body 1 and the lower slag bucket 3, forming a sealing structure inside the expansion joint 2 to prevent positive pressure ash from entering the expansion joint and causing the expansion joint to overheat, thereby effectively extending the service life of the expansion joint. When the ash discharged from the garbage incinerator enters the slag pipe body 1, the slag pipe body 1 and the expansion joint 2 are both heated and expanded, and the expansion joint 2 is used to provide auxiliary support for the slag pipe body 1, which effectively prevents the slag pipe body 1 from generating thermal fatigue and leaking slag, thereby extending the service life of the slag pipe.

[0022] like Figure 2 As shown, the lower slag bucket 3 is provided with gripping nails 4 and anti-wear lining 5, the gripping nails 4 are welded to the inner wall of the lower slag bucket 3, the anti-wear lining 5 is built along the inner wall of the lower slag bucket 3, and the gripping nails 4 are wrapped inside the anti-wear lining 5. The anti-wear lining 5 is made of wear-resistant plastic material, which has the advantages of strong adhesion, not easy to fall off, convenient laying and simple molding. After the lining is molded, the hardness is very high and can absorb most of the impact force of the slag flow. At the same time, the gripping nails 4 can prevent the cracks inside the anti-wear lining 5 from extending through the root, and prevent the anti-wear lining 5 from falling off over a large area.

[0023] In this embodiment, the upper part of the anti-wear lining 5 is inclined toward the central axis of the lower slag bucket 3 to drain the falling slag, and the lower part of the anti-wear lining 5 is arranged in the vertical direction. Furthermore, the top of the anti-wear lining 5 is located at the midpoint of the side wall of the lower slag bucket 3, and the bottom of the anti-wear lining 5 is located at the slag outlet of the lower slag bucket 3. The ash discharged from the slag falling pipe body 1 mainly contacts the anti-wear lining 5 inside the lower slag bucket 3. The anti-wear lining 5 effectively protects the inner wall of the lower slag bucket 3, reduces the wear on the lower slag bucket 3, and prolongs the service life of the lower slag bucket 3.

[0024] like Figure 1 As shown, the expansion joint 2 includes a supporting corrugated node 21 and a refractory layer 22. The refractory layer 22 is filled inside the supporting corrugated node 21. The refractory layer 22 is close to the slag falling pipe body 1. The top of the supporting corrugated node 21 is welded to the upper part of the slag falling pipe body 1, and the bottom of the expansion joint 2 is welded to the top of the lower slag bucket 3. Furthermore, the supporting corrugated node 21 is made of stainless steel material, and the refractory layer 22 is made of refractory fiber blanket. The heat of the slag falling pipe body 1 is conducted to the refractory layer 22, and then the thermal expansion received by the refractory layer 22 is conducted to the supporting corrugated node 21. The thermal expansion received by the supporting corrugated node 21 can cause the corrugated node to produce axial and lateral displacement, thereby realizing automatic expansion and contraction of the corrugated node.

[0025] In this embodiment, the expansion joint 2 is fully welded with the slag pipe body 1 and the lower slag bucket 3. There is no movable gap in the expansion joint 2 that communicates with the outside world. The support wave node 21 made of stainless steel can absorb expansion or compression stress. The refractory layer 22 made of refractory fiber blanket material forms a sealing structure in a compressed state to prevent positive pressure ash from entering the expansion joint 2, causing the support wave node 21 to overheat and affect its service life. To take a step back, if the slag pipe body 1 leaks slag, the ash will also fall into the refractory layer 22. If the refractory layer 22 is damaged, the ash will contact the support wave node 21 and will not scatter to the outside of the expansion joint 2, thereby improving the safety of slag dropping.

[0026] In this embodiment, the function of the expansion joint 2 is mainly to compensate for axial deformation. Through its large axial flexibility and easy deformation, it can compensate for the thermal expansion difference between the inside of the slag pipe body 1 and the shell due to different wall temperatures, reduce their force load, and reduce the temperature difference stress between the inside of the slag pipe body 1 and the shell, avoid strength damage, instability damage and pull-off damage of the slag pipe body 1, and extend the service life of the slag pipe.

[0027] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A slag pipe for a waste incinerator, characterized in that: include: A slag falling pipe body (1), an expansion joint (2) and a lower slag bucket (3); the slag inlet of the slag falling pipe body (1) is connected and fixed to the slag outlet of the waste incinerator, the lower part of the slag falling pipe body (1) is connected and fixed to the top of the lower slag bucket (3), and the slag outlet of the slag falling pipe body (1) extends to the inside of the lower slag bucket (3); the ash from the waste incinerator falls into the lower slag bucket (3) through the slag falling pipe body (1) and then enters the slag discharger; the expansion joint (2) is nested in the slag falling pipe body (1) and the lower slag bucket (3) is connected to the lower slag bucket (3 ... ) periphery, the top of the expansion joint (2) is connected and fixed to the upper part of the slag falling pipe body (1), the bottom of the expansion joint (2) is connected and fixed to the top of the lower slag bucket (3), and a sealing structure is formed inside the expansion joint (2); when ash discharged from the waste incinerator enters the slag falling pipe body (1), the slag falling pipe body (1) and the expansion joint (2) are both heated and expanded, and the expansion joint (2) provides auxiliary support for the slag falling pipe body (1) to prevent the slag falling pipe body (1) from generating thermal fatigue and leaking slag.

2. The slag pipe for a waste incinerator according to claim 1, characterized in that: The lower slag bucket (3) is provided with gripping nails (4) and an anti-wear lining (5) inside, the gripping nails (4) are welded to the inner wall of the lower slag bucket (3), the anti-wear lining (5) is built along the inner wall of the lower slag bucket (3), and the gripping nails (4) are wrapped inside the anti-wear lining (5).

3. The slag pipe for a waste incinerator according to claim 2, characterized in that: The upper portion of the anti-wear lining (5) is inclined toward the central axis of the lower slag bucket (3) so as to drain the fallen slag, and the lower portion of the anti-wear lining (5) is arranged in a vertical direction.

4. The slag pipe for a waste incinerator according to claim 3, characterized in that: The top of the anti-wear lining (5) is located at the midpoint of the side wall of the lower slag hopper (3), and the bottom of the anti-wear lining (5) is located at the slag outlet of the lower slag hopper (3).

5. The slag pipe for a waste incinerator according to any one of claims 1 to 4, characterized in that: The expansion joint (2) comprises a supporting corrugated node (21) and a refractory layer (22), wherein the refractory layer (22) is filled inside the supporting corrugated node (21); the top of the supporting corrugated node (21) is welded to the upper part of the slag dropping pipe body (1), and the bottom of the expansion joint (2) is welded to the top of the lower slag bucket (3); the supporting corrugated node (21) can expand and contract.

6. The slag pipe for a waste incinerator according to claim 5, characterized in that: The supporting corrugated node (21) is made of stainless steel material, and the refractory layer (22) is made of refractory fiber blanket.

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