An anti-corrosion superheater system for a waste incineration boiler

Abstract

The present invention relates to an anti-corrosion superheater system for a waste incineration boiler, belonging to the field of waste incineration technology. It includes a boiler body, a smoke outlet pipe fitting, a first air blowing device located on the smoke outlet pipe fitting, and a superheater device. One end of the smoke outlet pipe fitting is communicated with the smoke outlet of the boiler body, and the other end is communicated with the superheater device. The first air blowing device is arranged on the smoke outlet pipe fitting. The first air blowing device includes a first blower and a first air blowing pipe. The first blower is arranged on the smoke outlet pipe fitting, the air outlet of the first blower is communicated with the first air blowing pipe, and the first air blowing pipe is communicated with the smoke outlet pipe fitting. By blowing low-temperature air into the smoke outlet pipe fitting, the present invention enables the low-temperature air to exchange heat with the high-temperature corrosive flue gas generated by the boiler body to generate high-temperature air, reducing the direct heat exchange between the high-temperature corrosive flue gas and the superheater device, fundamentally solving the problem of corrosion of the superheater device, and capable of improving the working efficiency of the boiler body.

Description

Technical Field

[0001] The present invention relates to the field of waste incineration technology, and more particularly to an anti-corrosion superheater system for a waste incineration boiler. Background Art

[0002] Currently, with the increasing amount of urban domestic waste, waste has brought increasing pressure to the green and environmental protection of the city. In order to treat urban waste, waste incineration is usually adopted, and a large amount of waste is put into a power generation boiler for combustion treatment. During the combustion process of waste, a large amount of heat is generated.

[0003] During the incineration process of waste, the boiler flue gas generated contains a large amount of corrosive flue gas, which will cause serious high-temperature corrosion to the boiler superheater, etc. at high temperatures, resulting in a relatively low overall power generation efficiency of the system.

[0004] Regarding the above related technologies, the inventor believes that during the incineration process of waste, a large amount of high-temperature corrosive air is generated. After the high-temperature corrosive air comes into direct contact with the high-temperature steam metal heat exchanger, it is easy to cause corrosion of the boiler superheater. Summary of the Invention

[0005] In order to reduce the corrosion that occurs after the high-temperature corrosive air generated by the boiler comes into contact with the high-temperature steam metal heat exchanger and improve the working efficiency of the power generation boiler. The present invention provides an anti-corrosion superheater system for a waste incineration boiler, which includes a boiler body, a smoke outlet pipe fitting, a first air blowing device located on the smoke outlet pipe fitting, and a superheater device. One end of the smoke outlet pipe fitting is communicated with the smoke outlet of the boiler body, and the other end is communicated with the superheater device. The first air blowing device is arranged on the smoke outlet pipe fitting. The first air blowing device includes a first blower and a first air blowing pipe. The air outlet of the first blower is communicated with the first air blowing pipe, and the first air blowing pipe is communicated with the smoke outlet pipe fitting.

[0006] By adopting the above technical solution, the first blower is adjusted. The first blower blows low-temperature air into the smoke outlet pipe fitting through the first air blowing pipe. When the high-temperature corrosive flue gas generated by the boiler body moves along the smoke outlet pipe fitting, the high-temperature corrosive flue gas generated by the boiler body directly exchanges heat with the low-temperature air to generate high-temperature gas, and the high-temperature gas continues to move forward. Finally, the high-temperature gas directly contacts the superheater device for energy conversion. By blowing low-temperature air into the smoke outlet pipe fitting, the low-temperature air exchanges heat with the high-temperature corrosive flue gas generated by the boiler body to generate high-temperature air, reducing the direct heat exchange between the high-temperature corrosive flue gas and the superheater device, fundamentally solving the problem of corrosion of the superheater device, and being able to improve the working efficiency of the boiler body.

[0007] Optionally, the flue gas pipe fitting includes a horizontal pipe and a vertical pipe. The horizontal pipe is communicatively connected to the vertical pipe. One end of the horizontal pipe away from the vertical pipe is communicatively connected to the flue gas outlet of the boiler body. The first air blowing pipe is communicatively connected to the horizontal pipe. One end of the vertical pipe away from the horizontal pipe is connected to the superheater device.

[0008] By adopting the above technical solution, during the flow of the high-temperature corrosive flue gas generated by the boiler body, the corrosive flue gas first enters the horizontal pipe. During the movement of the corrosive flue gas from the horizontal pipe to the vertical pipe, sufficient time is left for the corrosive flue gas and the low-temperature air to undergo energy conversion, converting the low-temperature air into high-temperature air. Then, the high-temperature air moves upward along the vertical pipe. The provided flue gas pipe fitting facilitates the energy conversion between the high-temperature corrosive flue gas generated by the boiler body and the low-temperature air, and can improve the energy conversion efficiency.

[0009] Optionally, an exchange pipe for energy conversion is provided between the horizontal pipe and the vertical pipe.

[0010] By adopting the above technical solution, the provided exchange pipe can provide space for the heat conversion between the high-temperature corrosive flue gas generated by the boiler body and the low-temperature air, converting the high-temperature corrosive flue gas and the low-temperature air into high-temperature air.

[0011] Optionally, a guide plate for guiding the first air blowing pipe is provided between the horizontal pipe and the vertical pipe.

[0012] By adopting the above technical solution, the provided guide plate can play a certain guiding role in the flow of the low-temperature air flowing in from the first air blowing pipe and the high-temperature corrosive flue gas flowing in from the horizontal pipe, causing the low-temperature air and the high-temperature corrosive flue gas to be blown into the exchange pipe for energy conversion, thereby improving the energy conversion efficiency.

[0013] Optionally, a second air blowing device is further included. The second air blowing device includes a second blower and a second air blowing pipe. One end of the second air blowing pipe is communicatively connected to the air outlet of the second blower, and the air outlet of the second air blowing pipe is communicatively connected to the vertical pipe.

[0014] By adopting the above technical solution, by adjusting the second blower, the second blower blows the low-temperature air into the second air blowing pipe, enabling the high-temperature corrosive flue gas that has not yet undergone energy conversion to undergo energy conversion with the low-temperature air again. The provided second air blowing device enables the low-temperature air to continue to perform energy conversion on the high-temperature corrosive flue gas that has not yet undergone energy conversion, improving the energy conversion efficiency of the high-temperature corrosive flue gas, reducing the corrosion of the high-temperature corrosive flue gas and the superheater device, and improving the working efficiency.

[0015] Optionally, it further includes an exhaust gas treatment device arranged on the vertical pipe. The exhaust gas treatment device includes a treatment pipe, a treatment box, and an adsorbent. The adsorbent is arranged inside the treatment box and is used for adsorbing and treating the harmful gases generated by the boiler body. One end of the treatment pipe is communicated with the vertical pipe, and the other end is communicated with the smoke inlet of the treatment box. The smoke outlet of the treatment box is communicated with the superheater device.

[0016] By adopting the above technical solution, the high-temperature air converted from the vertical pipe enters the treatment box through the treatment pipe. Under the action of the adsorbent, the harmful substances in the high-temperature air can be adsorbed, and the discharge of harmful substances can be reduced. The arranged exhaust gas treatment device can treat the harmful substances in the high-temperature air and improve the air quality discharged from the boiler body.

[0017] Optionally, it further includes a soot treatment device arranged on the treatment pipe. The soot treatment device includes a filter screen and a recovery box. Both the filter screen and the recovery box are arranged on the treatment pipe. The filter screen is used for filtering the flue gas generated by the boiler body, and the recovery box is used for collecting and treating the flue gas generated by the boiler body.

[0018] By adopting the above technical solution, when the flue gas generated by the boiler body enters the treatment pipe, the filter screen can filter the flue gas generated by the boiler body and reduce the discharge of impurities into the air. The arranged soot treatment device can filter the flue gas generated by the boiler body, reduce the direct discharge of impurities into the air, and play a certain role in protecting the environment.

[0019] Optionally, a cleaning mechanism is arranged on the filter screen. The cleaning mechanism includes a driving motor, a cleaning plate, and a cleaning brush. The cleaning plate is arranged on the driving shaft of the driving motor, and the cleaning brush is arranged on the side of the cleaning plate close to the filter screen. The driving motor is used for driving the cleaning plate to move.

[0020] By adopting the above technical solution, adjust the driving motor. The driving shaft of the driving motor drives the cleaning plate to move. During the movement of the cleaning plate, it can drive the brush located thereon to move. During the movement of the brush, it can clean the residues and soot on the filter screen. The arranged cleaning mechanism can timely clean the residues accumulated too much on the filter screen, reduce the blockage inside the treatment pipe, and improve the fluidity of the high-temperature air in the treatment pipe.

[0021] In summary, the present invention includes at least one of the following beneficial technical effects:

[0022] By blowing low-temperature air into the smoke outlet pipe fitting, the low-temperature air exchanges heat with the high-temperature corrosive flue gas generated by the boiler body to generate high-temperature air, reducing the direct heat exchange between the high-temperature corrosive flue gas and the superheater equipment, fundamentally solving the problem of corrosion of the superheater equipment, and improving the working efficiency of the boiler body;

[0023] The provided smoke outlet pipe fitting facilitates the energy conversion between the high-temperature corrosive flue gas generated by the boiler body and the low-temperature air, and can improve the energy conversion efficiency;

[0024] The provided second air blowing device enables the low-temperature air to further perform energy conversion on the high-temperature corrosive flue gas that has not yet undergone energy conversion, improving the energy conversion efficiency of the high-temperature corrosive flue gas, reducing the corrosion caused by the high-temperature corrosive flue gas to the superheater equipment, and improving the working efficiency;

[0025] The provided tail gas treatment device can treat the harmful substances in the high-temperature air and improve the air quality discharged from the boiler body;

[0026] The provided soot treatment device can filter the flue gas generated by the boiler body, reduce the direct discharge of impurities into the air, and play a certain role in protecting the environment. Brief Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of an anti-corrosion superheater system for a waste incineration boiler according to an embodiment of the present invention.

[0028] Figure 2 is the cross-sectional view of an anti-corrosion superheater system for a waste incineration boiler according to an embodiment of the present invention.

[0029] Figure 3 is Figure 2 the enlarged schematic diagram of part A in

[0030] Description of the Reference Numerals: 1. Boiler body; 2. Smoke outlet pipe fitting; 21. Horizontal pipe; 22. Vertical pipe; 23. Exchange pipe; 24. Guide plate; 3. First air blowing device; 31. First blower; 32. First air blowing pipeline; 4. Superheater equipment; 5. Second air blowing device; 51. Second blower; 52. Second air blowing pipeline; 6. Tail gas treatment device; 61. Treatment pipe; 62. Treatment box; 63. Adsorption part; 7. Soot treatment device; 71. Filter screen; 72. Recovery box; 73. Cleaning mechanism; 731. Driving motor; 732. Cleaning plate; 733. Cleaning brush. Detailed Description of the Embodiment

[0031] The following further describes the present invention in detail with reference to the attached Figures 1-3 drawings.

[0032] An embodiment of the present invention discloses an anti-corrosion superheater system for a waste incineration boiler. Refer to Figure 1 , the anti-corrosion superheater system for a waste incineration boiler includes a boiler body 1, a smoke outlet pipe fitting 2, a first air blowing device 3 located on the smoke outlet pipe fitting 2, and a superheater device 4. One end of the smoke outlet pipe fitting 2 is communicated with the smoke outlet of the boiler body 1, and the other end is communicated with the superheater device 4. The first air blowing device 3 is arranged on the smoke outlet pipe fitting 2, and the first air blowing device 3 can blow low-temperature air into the smoke outlet pipe fitting 2.

[0033] Refer to Figure 1 , in order to reduce the corrosion caused by the high-temperature corrosive flue gas generated by the boiler body 1 burning waste after contacting the superheater device 4 and improve the working efficiency of the boiler body 1. The first air blowing device 3 includes a first blower 31 and a first air blowing pipe 32. The air outlet of the first blower 31 is communicated with the first air blowing pipe 32, and the first air blowing pipe 32 is communicated with the smoke outlet pipe fitting 2.

[0034] Refer to Figure 1 and Figure 2 , in order to facilitate the heat exchange between the low-temperature air and the high-temperature corrosive flue gas generated by the boiler body 1, the smoke outlet pipe fitting 2 includes a horizontal pipe 21 and a vertical pipe 22. One end of the horizontal pipe 21 away from the vertical pipe 22 is communicated with the smoke outlet of the boiler body 1. An exchange pipe 23 is arranged between the horizontal pipe 21 and the vertical pipe 22. The exchange pipe 23 is integrally connected with the horizontal pipe 21 and the vertical pipe 22 respectively, and the horizontal pipe 21 and the vertical pipe 22 are communicated through the exchange pipe 23. A guide plate 24 is arranged between the horizontal pipe 21 and the vertical pipe 22. Through the guide plate 24, the flow of the low-temperature air and the high-temperature corrosive flue gas can be guided, so that the low-temperature air and the high-temperature corrosive flue gas flow into the exchange pipe 23 for heat conversion. The first air blowing pipe 32 is communicated with the horizontal pipe 21, and one end of the vertical pipe 22 away from the horizontal pipe 21 is connected to the superheater device 4.

[0035] Refer to Figure 1 and Figure 2 , in order to improve the full heat exchange between the low-temperature air and the high-temperature corrosive flue gas, a second air blowing device 5 is further included. The second air blowing device 5 includes a second blower 51 and a second air blowing pipe 52. One end of the second air blowing pipe 52 is communicated with the air outlet of the second blower 51, and the base of the second blower 51 is fixed on the second air blowing pipe 52 by bolts. The air outlet of the second air blowing pipe 52 is communicated with the air inlet of the vertical pipe 22, and the second air blowing pipe 52 is integrally connected with the vertical pipe 22. By adjusting the second blower 51, the second blower 51 can blow low-temperature air into the vertical pipe 22 through the second air blowing pipe 52, so that the low-temperature air and the high-temperature corrosive flue gas that has not yet undergone energy conversion can perform energy conversion.

[0036] Refer to Figure 2 and Figure 3, for facilitating the treatment of harmful gases in the tail gas, it further includes a tail gas treatment device 6 provided on the vertical pipe 22. The tail gas treatment device 6 includes a treatment pipe 61, a treatment box 62 and an adsorbent 63. One end of the treatment pipe 61 is communicated with the vertical pipe 22, and the other end is communicated with the smoke inlet of the treatment box 62. The smoke outlet of the treatment box 62 is communicated with the superheater device 4. The adsorbent 63 is arranged inside the treatment box 62. In this embodiment, the adsorbent 63 is set as activated carbon particles. When high-temperature gas passes through, the adsorbent 63 can adsorb and treat the harmful gases generated by the boiler body 1, reducing the discharge of harmful substances into the air.

[0037] Referring to Figure 2 and Figure 3 , it further includes a soot treatment device 7 provided on the treatment pipe 61. The soot treatment device 7 includes a filter screen 71 and a recovery box 72. Both the filter screen 71 and the recovery box 72 are provided on the treatment pipe 61. The filter screen 71 is fixed to the treatment pipe 61 by bolts. The filter screen 71 can filter the flue gas generated by the boiler body 1. The recovery box 72 is fixed to the treatment pipe 61 by bolts. The recovery box 72 can collect and treat the flue gas generated by the boiler body 1. In order to reduce the blockage of the filter screen 71 by the residue on the filter screen 71, a cleaning mechanism 73 is provided on the filter screen 71. The cleaning mechanism 73 includes a driving motor 731, a cleaning plate 732 and a cleaning brush 733. The cleaning plate 732 is arranged on the driving shaft of the driving motor 731. The cleaning brush 733 is adhered to the side of the cleaning plate 732 close to the filter screen 71. The driving shaft of the driving motor 731 is fixed to the filter screen 71 by bolts. By adjusting the driving motor 731, the driving shaft of the driving motor 731 can drive the cleaning plate 732 to move. During the movement of the cleaning plate 732, the cleaning brush 733 can be driven to clean the gaps of the filter screen 71.

[0038] The implementation principle of an anti-corrosion waste incineration boiler superheater system in an embodiment of the present application is as follows: Adjust the first blower 31. The first blower 31 blows low-temperature air into the horizontal pipe 21 through the first air duct 32. When the high-temperature corrosive flue gas generated by the boiler body 1 moves along the horizontal pipe 21, under the action of the guide plate 24, the high-temperature corrosive flue gas and the low-temperature air move to the exchange pipe 23 for direct heat exchange to generate high-temperature gas, and the high-temperature gas continues to move forward. During the flow of the high-temperature corrosive flue gas generated by the boiler body 1, the corrosive flue gas first enters the horizontal pipe 21. During the movement of the corrosive flue gas in the horizontal pipe 21 to the vertical pipe 22, enough time is left for the corrosive flue gas and the low-temperature air to undergo energy conversion, converting the low-temperature air into high-temperature air.

[0039] Adjust the second blower 51. The second blower 51 blows low-temperature air into the second air duct 52, causing the high-temperature corrosive flue gas that has not yet undergone energy conversion to undergo energy conversion again with the low-temperature air. Then, the converted high-temperature air first passes through the treatment pipe 61. When the high-temperature air enters the treatment pipe 61, the filter net 71 can filter the flue gas generated by the boiler body 1, and the accumulated impurities fall into the interior of the recovery box 72. When the filter net 71 becomes blocked, adjust the drive motor 731. The drive shaft of the drive motor 731 drives the cleaning plate 732 to move. During the movement of the cleaning plate 732, it can drive the brush located thereon to move. During the movement of the brush, it can timely clean the residue on the filter net 71, reducing the blockage of the filter net 71.

[0040] After the high-temperature air passes through the filter net 71, the high-temperature air enters the treatment box 62. Under the action of the adsorbent 63, the adsorbent 63 can adsorb the harmful substances in the high-temperature air, reducing the discharge of harmful substances into the air. Finally, the high-temperature gas contacts the superheater device 4 for energy conversion.

[0041] The above are all the preferred embodiments of this application. Without restricting the protection scope of this application based on this, therefore: Any equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An anti-corrosion superheater system for a waste incineration boiler, characterized in that: It includes a boiler body (1), a smoke outlet pipe fitting (2), a first air blowing device (3) located on the smoke outlet pipe fitting (2), and a superheater device (4). One end of the smoke outlet pipe fitting (2) is communicated with the smoke outlet of the boiler body (1), and the other end is communicated with the superheater device (4). The first air blowing device (3) is arranged on the smoke outlet pipe fitting (2). The first air blowing device (3) includes a first blower (31) and a first air blowing pipe (32). The air outlet of the first blower (31) is communicated with the first air blowing pipe (32), and the first air blowing pipe (32) is communicated with the smoke outlet pipe fitting (2); The smoke outlet pipe fitting (2) includes a horizontal pipe (21) and a vertical pipe (22). The horizontal pipe (21) is communicated with the vertical pipe (22). One end of the horizontal pipe (21) far from the vertical pipe (22) is communicated with the smoke outlet of the boiler body (1). The first air blowing pipe (32) is communicated with the horizontal pipe (21). One end of the vertical pipe (22) far from the horizontal pipe (21) is connected to the superheater device (4); An exchange pipe (23) for energy conversion is arranged between the horizontal pipe (21) and the vertical pipe (22); A guide plate (24) for guiding the first air blowing pipe (32) is arranged between the horizontal pipe (21) and the vertical pipe (22).

2. The anti-corrosion superheater system for a waste incineration boiler according to claim 1, characterized in that: It further includes a second air blowing device (5). The second air blowing device (5) includes a second blower (51) and a second air blowing pipe (52). One end of the second air blowing pipe (52) is communicated with the air outlet of the second blower (51), and the air outlet of the second air blowing pipe (52) is communicated with the vertical pipe (22).

3. The anti-corrosion superheater system for a waste incineration boiler according to claim 1, characterized in that: It further includes an exhaust gas treatment device (6) arranged on the vertical pipe (22). The exhaust gas treatment device (6) includes a treatment pipe (61), a treatment box (62), and an adsorbent (63). The adsorbent (63) is arranged inside the treatment box (62). The adsorbent (63) is used for adsorbing and treating harmful gases generated by the boiler body (1). One end of the treatment pipe (61) is communicated with the vertical pipe (22), and the other end is communicated with the smoke inlet of the treatment box (62). The smoke outlet of the treatment box (62) is communicated with the superheater device (4).

4. The anti-corrosion superheater system for a waste incineration boiler according to claim 3, characterized in that: It further includes a soot treatment device (7) arranged on the treatment pipe (61). The soot treatment device (7) includes a filter screen (71) and a recovery box (72). Both the filter screen (71) and the recovery box (72) are arranged on the treatment pipe (61). The filter screen (71) is used to filter the flue gas generated by the boiler body (1), and the recovery box (72) is used to collect and treat the flue gas generated by the boiler body (1).

5. A superheater system of an anti-corrosion waste incineration boiler according to claim 4, characterized in that: a cleaning mechanism (73) is arranged on the filter screen (71). The cleaning mechanism (73) includes a driving motor (731), a cleaning plate (732) and a cleaning brush (733). The cleaning plate (732) is arranged on the driving shaft of the driving motor (731). The cleaning brush (733) is arranged on the side of the cleaning plate (732) close to the filter screen (71). The driving motor (731) is used to drive the cleaning plate (732) to move.

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