Self-cleaning flue gas waste heat recovery device

Abstract

The utility model discloses a self-cleaning flue gas waste heat recovery device. According to the technical key points, the device comprises a heat exchanger, the heat exchanger comprises an output header pipe, an input header pipe and a plurality of heat exchange pipes connected with the input header pipe and the output header pipe, and the output header pipe is close to the smoke output position. The ash removal mechanism comprises a vertical ash removal assembly and a horizontal ash removal assembly, the vertical ash removal assembly comprises a vertical removal frame and a vertical removal rod, and the horizontal ash removal assembly comprises a horizontal removal frame and a horizontal removal rod. And in addition, cleaning can be conducted when the incinerator conducts incineration, the incinerator does not need to be closed, and the incineration power generation efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery, and more specifically, to a self-cleaning flue gas waste heat recovery device. Background Art

[0002] In an incinerator, garbage burns at a high temperature to generate flames and flue gas, which exchanges heat with the iron furnace pipeline, and then drives a turbine generator to generate electricity. However, there is a large amount of fly ash in the flue gas. The fly ash has a high viscosity and will adhere to the outer side of the iron furnace pipeline / heat exchanger, reducing the heat exchange efficiency and the power generation efficiency. Therefore, it is necessary to regularly clean the fly ash attached to the outside of the iron furnace pipeline, and cleaning the fly ash outside the iron furnace pipeline requires the incinerator to stop burning, which also reduces the power generation efficiency of the power plant. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a self-cleaning flue gas waste heat recovery device to solve the above technical problems.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A self-cleaning flue gas waste heat recovery device includes a heat exchanger. The heat exchanger includes an output main pipe, an input main pipe, and a plurality of heat exchange pipes connecting the input main pipe and the output main pipe. The output main pipe is close to the output position of the flue gas. A dust cleaning mechanism is arranged outside the heat exchanger. The dust cleaning mechanism includes a vertical dust cleaning component and a horizontal dust cleaning component. The vertical dust cleaning component includes:

[0005] A vertical cleaning frame, which is horizontally arranged and can be horizontally moved on an external device. There are two vertical cleaning frames, which are respectively located on the upper and lower sides of the heat exchanger;

[0006] Vertical cleaning rods, which are vertically fixed on the vertical cleaning frame. Vertical cleaning grooves are arranged on the vertical cleaning rods, and the vertical cleaning grooves are attached to the side of the heat exchange pipe;

[0007] The horizontal dust cleaning component includes:

[0008] A horizontal cleaning frame, which is vertically arranged and can be horizontally moved on an external device. There are two horizontal cleaning frames, which are respectively located on the left and right sides of the heat exchanger;

[0009] Horizontal cleaning rods, which are horizontally fixed on the horizontal cleaning frame. Horizontal cleaning grooves are arranged on the horizontal cleaning rods, and the horizontal cleaning grooves are attached to the side of the heat exchange pipe; the horizontal cleaning rods and the vertical cleaning rods are staggered.

[0010] As a further improvement of the utility model, vertical cleaning protrusions are arranged on the side of the vertical cleaning groove of the vertical cleaning rod, and inclined vertical guiding edges are arranged on the vertical cleaning protrusions.

[0011] As a further improvement of the present utility model, the horizontal cleaning rod is provided with a horizontal cleaning protrusion on the side of the horizontal cleaning groove, and the horizontal cleaning protrusion is provided with a horizontally inclined guiding edge.

[0012] As a further improvement of the present utility model, a first reinforcing rod is provided between adjacent vertical cleaning rods.

[0013] As a further improvement of the present utility model, a second reinforcing rod is provided between adjacent horizontal cleaning rods.

[0014] The beneficial effects of the present utility model are as follows: the fly ash on the outer side of the heat exchange tube is regularly cleaned, so that the heat exchange tube has good heat exchange efficiency and high power generation efficiency, and it can be cleaned during the incineration in the incinerator without shutting down the incinerator, further improving the incineration power generation efficiency. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic cross-sectional structure diagram of the vertical ash cleaning assembly;

[0017] Figure 3 is a schematic cross-sectional structure diagram of the horizontal ash cleaning assembly;

[0018] Figure 4 is a schematic cross-sectional view of the heat exchange tube and the vertical cleaning rod;

[0019] Figure 5 is a schematic cross-sectional view of the heat exchange tube and the horizontal cleaning rod.

[0020] Marking description: 1. Heat exchanger; 11. Input main pipe; 12. Output main pipe; 13. Heat exchange tube; 2. Ash cleaning mechanism; 3. Vertical ash cleaning assembly; 31. Vertical cleaning frame; 32. Vertical cleaning rod; 33. Vertical cleaning groove; 34. Vertical cleaning protrusion; 341. Vertical guiding edge; 35. First reinforcing rod; 4. Horizontal ash cleaning assembly; 41. Horizontal cleaning frame; 42. Horizontal cleaning rod; 43. Horizontal cleaning groove; 44. Horizontal cleaning protrusion; 441. Horizontal guiding edge; 45. Second reinforcing rod. Detailed Embodiment

[0021] The following will further describe the present utility model in detail with reference to the embodiments shown in the drawings.

[0022] Refer to Figure 1 One Figure 5As shown in the figure, a self-cleaning flue gas waste heat recovery device according to this embodiment includes a heat exchanger 1. The heat exchanger 1 includes an output main pipe 12, an input main pipe 11, and a number of heat exchange pipes 13 connecting the input main pipe 11 and the output main pipe 12. The output main pipe 12 is close to the flue gas output position. A dust cleaning mechanism 2 is provided outside the heat exchanger 1. The dust cleaning mechanism 2 includes a vertical dust cleaning component 3 and a horizontal dust cleaning component 4. The vertical dust cleaning component 3 includes:

[0023] A vertical cleaning frame 31, which is horizontally arranged and is horizontally movably arranged on an external device. There are two vertical cleaning frames 31, which are respectively located on the upper and lower sides of the heat exchanger 1;

[0024] A vertical cleaning rod 32, which is vertically fixed on the vertical cleaning frame 31. A vertical cleaning groove 33 is provided on the vertical cleaning rod 32, and the vertical cleaning groove 33 is attached to the side of the heat exchange pipe 13;

[0025] The horizontal dust cleaning component 4 includes:

[0026] A horizontal cleaning frame 41, which is vertically arranged and is horizontally movably arranged on an external device. There are two horizontal cleaning frames 41, which are respectively located on the left and right sides of the heat exchanger 1;

[0027] A horizontal cleaning rod 42, which is horizontally fixed on the horizontal cleaning frame 41. A horizontal cleaning groove 43 is provided on the horizontal cleaning rod 42, and the horizontal cleaning groove 43 is attached to the side of the heat exchange pipe 13; the horizontal cleaning rod 42 is misaligned with the vertical cleaning rod 32.

[0028] Through the above technical solution, the dust cleaning mechanism 2 operates regularly to remove the fly ash attached to the heat exchange pipes 13. Before the dust cleaning mechanism 2 operates, the vertical dust cleaning component 3 and the horizontal dust cleaning component 4 are located at one end of the heat exchange pipes 13. When cleaning the dust, the vertical dust cleaning component 3 and the horizontal dust cleaning component 4 move to the other end of the heat exchange pipes 13 to remove the fly ash attached to the outer wall of the heat exchange pipes 13, and then return to their original positions to wait for the next cleaning. Regularly cleaning the fly ash outside the heat exchange pipes 13 can keep the heat exchange pipes 13 having good heat exchange efficiency, high power generation efficiency, and can be cleaned during the incineration in the incinerator without shutting down the incinerator, further improving the incineration power generation efficiency.

[0029] When the vertical cleaning component cleans the dust, the vertical cleaning frame 31 moves, which in turn drives the vertical cleaning rod 32 to move, and then scrapes off the fly ash attached to the area of the heat exchange pipe 13 corresponding to the vertical cleaning groove 33.

[0030] When the horizontal cleaning component cleans the dust, the horizontal cleaning frame 41 moves, which in turn drives the horizontal cleaning rod 42 to move, and then scrapes off the fly ash attached to the area of the heat exchange pipe 13 corresponding to the horizontal cleaning groove 43.

[0031] Specifically, the vertical cleaning frame 31 and the horizontal cleaning frame 41 are slidably mounted on an external device through guide rails and sliding grooves, and have high stability during the sliding process.

[0032] Specifically, the vertical cleaning frame 31 and the horizontal cleaning frame 41 are driven by screws, with high stability, high control precision, and are resistant to high temperatures.

[0033] Specifically, the sum of the circumferential angles corresponding to the vertical cleaning grooves 33 on the upper and lower sides and the circumferential angles corresponding to the horizontal cleaning grooves 43 on the left and right sides is greater than 360°, so that there are no dead corners during the cleaning process of the heat exchange tube 13.

[0034] As a specific embodiment of the improvement, the vertical cleaning rod 32 is provided with a vertical cleaning protrusion 34 on the side of the vertical cleaning groove 33, and the vertical cleaning protrusion 34 is provided with an inclined vertical guiding edge 341.

[0035] Through the above technical solution, the vertical cleaning protrusion 34 fits against the side wall of the heat exchange tube 13, and can better clean the fly ash attached to the heat exchange tube 13 as the vertical cleaning rod 32 moves. Moreover, the cleaned fly ash falls under the guidance of the vertical guiding edge 341, avoiding the accumulation of fly ash at the edge of the vertical cleaning groove 33, and the cleaning is more thorough.

[0036] As a specific embodiment of the improvement, the horizontal cleaning rod 42 is provided with a horizontal cleaning protrusion 44 on the side of the horizontal cleaning groove 43, and the horizontal cleaning protrusion 44 is provided with an inclined horizontal guiding edge 441.

[0037] Through the above technical solution, the horizontal cleaning protrusion 44 fits against the side wall of the heat exchange tube 13, and can better clean the fly ash attached to the heat exchange tube 13 as the horizontal cleaning rod 42 moves. Moreover, the cleaned fly ash falls under the guidance of the horizontal guiding edge 441, avoiding the accumulation of fly ash at the edge of the horizontal cleaning groove 43, and the cleaning is more thorough.

[0038] As a specific embodiment of the improvement, a first reinforcing rod 35 is provided between adjacent vertical cleaning rods 32.

[0039] Through the above technical solution, the first reinforcing rod 35 connects adjacent vertical cleaning rods 32, so that the vertical cleaning rods 32 can tightly contact the heat exchange tube 13, the vertical cleaning groove 33 has a high fitting strength with the heat exchange tube 13, and can more stably remove the fly ash attached to the heat exchange tube 13.

[0040] Specifically, the positions of some of the first reinforcing rods 35 correspond to the positions of the heat exchange tubes, with strong pertinence, so that the vertical cleaning groove 33 fits more closely with the heat exchange tube.

[0041] As a specific embodiment of the improvement, a second reinforcing rod 45 is provided between adjacent horizontal cleaning rods 42.

[0042] Through the above technical solution, the second reinforcing rod 45 is connected to the adjacent horizontal cleaning rods 42, so that the horizontal cleaning rods 42 can be in close contact with the heat exchange tubes 13. The horizontal cleaning grooves 43 have a high fitting strength with the heat exchange tubes 13, and can more stably remove the fly ash adhering to the heat exchange tubes 13.

[0043] Specifically, the positions of some of the second reinforcing rods 45 correspond to the positions of the heat exchange tubes, with strong pertinence, making the horizontal cleaning grooves 43 fit more closely with the heat exchange tubes.

[0044] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A self-cleaning flue gas waste heat recovery device, comprising a heat exchanger (1), wherein the heat exchanger (1) comprises an output main pipe (12), an input main pipe (11), and a plurality of heat exchange pipes (13) connecting the input main pipe (11) and the output main pipe (12), wherein the output main pipe (12) is close to the output position of the flue gas, and is characterized in that: The heat exchanger (1) is provided with a dust cleaning mechanism (2) outside, the dust cleaning mechanism (2) comprising a vertical dust cleaning component (3) and a horizontal dust cleaning component (4), the vertical dust cleaning component (3) comprising: A vertical cleaning frame (31) is arranged horizontally, and the vertical cleaning frame (31) can be arranged horizontally and movably on an external device. There are two vertical cleaning frames (31), which are respectively located on the upper and lower sides of the heat exchanger (1); A vertical cleaning rod (32) is vertically fixed on the vertical cleaning frame (31), and a vertical cleaning groove (33) is provided on the vertical cleaning rod (32), and the vertical cleaning groove (33) is in contact with the side of the heat exchange tube (13); The horizontal dust cleaning component (4) comprises: A horizontal cleaning frame (41) is vertically arranged, and the horizontal cleaning frame (41) can be horizontally movably arranged on an external device. There are two horizontal cleaning frames (41), which are respectively located on the left and right sides of the heat exchanger (1); A horizontal cleaning rod (42) is horizontally fixed on the horizontal cleaning frame (41); a horizontal cleaning groove (43) is provided on the horizontal cleaning rod (42); the horizontal cleaning groove (43) is in contact with the side of the heat exchange tube (13); the horizontal cleaning rod (42) is offset from the vertical cleaning rod (32).

2. The self-cleaning flue gas waste heat recovery device according to claim 1 is characterized in that: The vertical cleaning rod (32) is provided with a vertical cleaning protrusion (34) on the side of the vertical cleaning groove (33), and the vertical cleaning protrusion (34) is provided with an inclined vertical guide edge (341).

3. The self-cleaning flue gas waste heat recovery device according to claim 1 or 2, characterized in that: The horizontal cleaning rod (42) is provided with a horizontal cleaning protrusion (44) on the side of the horizontal cleaning groove (43), and the horizontal cleaning protrusion (44) is provided with an inclined horizontal guide edge (441).

4. The self-cleaning flue gas waste heat recovery device according to claim 1 is characterized in that: A first reinforcing rod (35) is provided between adjacent vertical cleaning rods (32).

5. The self-cleaning flue gas waste heat recovery device according to claim 1 is characterized in that: A second reinforcing rod (45) is provided between adjacent horizontal cleaning rods (42).

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