Circulating denitration device for boiler flue

Abstract

The utility model provides a circulating denitration device for a boiler flue, which relates to the technical field of flue denitration and comprises a flue pipe shell, a first nozzle is fixedly connected to the outer surface of the flue pipe shell in a penetrating manner, a second nozzle is fixedly connected to the outer surface of the flue pipe shell in a penetrating manner, and the first nozzle and the second nozzle are communicated with each other. A third nozzle is fixedly connected to the outer surface of the flue pipe shell in a penetrating mode, the first nozzle is located below the second nozzle, and the second nozzle is located below the third nozzle. In the use process, the first nozzle at the bottom can conduct primary treatment on smoke just entering a flue, along with continuous rising of the smoke, the second nozzle and the third nozzle play a role in sequence to conduct further refined treatment on the smoke, the three sets of nozzles are evenly arranged, the spraying range can cover the whole pipeline, and the spraying effect is good. During working, the inner walls of a smoke port pipeline and a flue pipe shell are continuously scoured, dust is prevented from contaminating the pipeline, and the smoke pipeline is prevented from being attached and blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of flue denitration, in particular to a boiler flue circulating denitration device. Background Art

[0002] Denitration refers to the process of removing nitrogen oxides from combustion flue gas. The importance of preventing environmental pollution has been sharply raised as a worldwide issue. The relatively mainstream processes in the world are divided into SCR and SNCR.

[0003] In the prior art, as disclosed in Chinese Patent Publication No. CN215276361U, a monomer micro-pressure oxygen chamber system is disclosed, which includes: a denitration device body, a collecting pipe is fixedly connected to the lower end of the denitration device body, a funnel is fixedly connected to the lower end inside the denitration device body, a smoke inlet pipe is fixedly connected to the left side of the denitration device body, a clamping cover is fixedly connected to the left side inside the denitration device body, a lower dust-proof plate is fixedly connected to the upper end inside the denitration device body, an upper dust-proof plate is fixedly connected to the upper end inside the denitration device body, a lower sprayer is fixedly connected to the upper end inside the denitration device body, and an upper sprayer is fixedly connected to the upper end inside the denitration device body. Through the separate settings of the lower dust-proof plate, the upper dust-proof plate, the lower sprayer and the upper sprayer, although this denitration device achieves the effect of circulating denitration, and through the settings of the through holes, the collecting pipe and the funnel, it is convenient to collect the dirt and impurities generated after circulating denitration, and avoid external leakage from polluting the environment.

[0004] However, during the long-term use of the device in the boiler flue, the fuel in the boiler burns, resulting in the phenomenon that coal ash or other substances generated after coal combustion accumulate on the surface of the smoke pipe, which not only affects the flow of flue gas, but also causes incomplete combustion of the boiler fuel, reduces the energy utilization efficiency, and may also have an adverse impact on the environment. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that during the long-term use of the boiler flue in the prior art, the fuel in the boiler burns, resulting in the phenomenon that coal ash or other substances generated after coal combustion accumulate on the surface of the smoke pipe, which not only affects the flow of flue gas, but also causes incomplete combustion of the boiler fuel, reduces the energy utilization efficiency, and may also have an adverse impact on the environment, and a boiler flue circulating denitration device is proposed.

[0006] To achieve the above object, the utility model adopts the following technical solutions: including: a flue pipe housing, the outer surface of the flue pipe housing is fixedly connected through a first nozzle, the outer surface of the flue pipe housing is fixedly connected through a second nozzle, the outer surface of the flue pipe housing is fixedly connected through a third nozzle, the first nozzle is located below the second nozzle, the second nozzle is located below the third nozzle, one end of the third nozzle is welded with a first annular water channel, one end of the second nozzle is welded with a second annular water channel, one section of the first nozzle is welded with a third annular water channel, the outer surface of the first annular water channel is welded with a first connecting pipe, the outer surfaces of the first annular water channel and the second annular water channel are connected through the first connecting pipe, the outer surface of the second annular water channel is welded with a second connecting pipe, and the outer surfaces of the second annular water channel and the third annular water channel are connected through the second connecting pipe.

[0007] Preferably, a flue seal top is embedded in the top of the flue pipe housing, and a smoke outlet nozzle is fixedly connected to the top of the flue seal top.

[0008] Preferably, a smoke inlet pipe is fixedly connected to the bottom of the flue pipe housing.

[0009] Preferably, a first filter plate is fixedly connected to the inner wall of the flue pipe housing.

[0010] Preferably, a second filter plate is fixedly connected to the inner wall of the flue pipe housing, and a third filter plate is fixedly connected to the inner wall of the flue pipe housing.

[0011] Preferably, the first filter plate is located below the second filter plate, and the second filter plate is located below the third filter plate.

[0012] Preferably, a first smoke inlet pipe is fixedly connected through the outer surface of the smoke inlet pipe, a slag discharge port is fixedly connected to the bottom of the smoke inlet pipe, and a first feeding pipe is fixedly connected through the outer surface of the pipe.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are as follows.

[0014] 1. In the utility model, during use, the first nozzle at the bottom can first perform preliminary treatment on the flue gas just entering the flue. As the flue gas continues to rise, the second nozzle and the third nozzle play their roles in sequence to perform further refined treatment on the flue gas. Moreover, the three groups of nozzles are evenly arranged, and the spraying range can cover the entire pipeline. During operation, it continuously flushes the inner walls of the smoke inlet pipe and the flue pipe housing, avoiding dust from contaminating the pipeline and preventing blockage of the smoke passage due to adhesion.

[0015] 2. In the present utility model, when the equipment has problems, the embedded flue gas duct sealing top can be disassembled for easy maintenance, and impurities such as waste residues generated during the whole process can be discharged in time through the slag discharge port at the bottom of the flue gas inlet pipe, ensuring the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a three-dimensional view of a boiler flue gas duct circulating denitration device proposed by the present utility model;

[0017] Figure 2 FIG. is a three-dimensional view of another angle of a boiler flue gas duct circulating denitration device proposed by the present utility model;

[0018] Figure 3 FIG. is a cross-sectional view of a boiler flue gas duct circulating denitration device proposed by the present utility model;

[0019] Figure 4 FIG. is a feeding structure diagram of a boiler flue gas duct circulating denitration device proposed by the present utility model.

[0020] Legend: 1. Flue gas duct housing; 11. Flue gas inlet pipe; 12. Flue gas duct sealing top; 13. Smoke outlet nozzle; 14. Slag discharge port; 2. First annular water channel; 21. Second annular water channel; 22. Third annular water channel; 23. First feeding pipe; 24. First flue gas inlet pipe; 25. First connecting pipe; 26. Second connecting pipe; 27. First nozzle; 28. Second nozzle; 29. Third nozzle; 3. First filter plate; 31. Second filter plate; 32. Third filter plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0023] Embodiment 1: As Figures 1-4As shown in the figure, the utility model provides a boiler flue circulating denitration device, including: a flue pipe outer shell 1, the outer surface of the flue pipe outer shell 1 is fixedly connected through penetration with a first nozzle 27, the outer surface of the flue pipe outer shell 1 is fixedly connected through penetration with a second nozzle 28, the outer surface of the flue pipe outer shell 1 is fixedly connected through penetration with a third nozzle 29, the first nozzle 27 is located below the second nozzle 28, the second nozzle 28 is located below the third nozzle 29, one end of the third nozzle 29 is welded with a first annular water channel 2, one end of the second nozzle 28 is welded with a second annular water channel 21, one end of the first nozzle 27 is welded with a third annular water channel 22, the outer surface of the first annular water channel 2 is welded with a first connecting pipe 25, the outer surface of the first annular water channel 2 and the outer surface of the second annular water channel 21 are connected through the first connecting pipe 25, the outer surface of the second annular water channel 21 and the outer surface of the third annular water channel 22 are connected through a second connecting pipe 26, the top of the flue pipe outer shell 1 is embedded with a flue seal top 12, and the top of the flue seal top 12 is fixedly connected with a smoke outlet 13.

[0024] The effect achieved by the entire embodiment 1 is that when the device works, the flue gas enters the interior of the flue pipe outer shell 1 through the smoke inlet pipe 11 and the first smoke inlet pipe 24. During the upward movement of the flue gas, it will first pass through the layers of filtration of the first filter plate 3, the second filter plate 31 and the third filter plate 32, gradually removing impurity particles and other substances therein. At the same time, treatment substances such as denitration agents are added to the annular water channel system through the first feed pipe 23. The treatment substances flow in the first annular water channel 2, the second annular water channel 21, the third annular water channel 22 and the first connecting pipe 25 and the second connecting pipe 26 connecting them, and are sprayed out from the first nozzle 27, the second nozzle 28 and the third nozzle 29 to perform denitration treatment on the flue gas in the flue. Since the three nozzles are at different height positions, they can fully contact the flue gas at different levels, ensuring the comprehensiveness and uniformity of the denitration effect. The first nozzle 27 at the bottom can first perform preliminary treatment on the flue gas just entering the flue. As the flue gas continues to rise, the second nozzle 28 and the third nozzle 29 play their roles in turn to perform further refined treatment on the flue gas. Moreover, the three groups of nozzles are evenly arranged, and the spraying range can cover the entire pipeline. During operation, it continuously flushes the inner walls of the smoke inlet pipe 11 and the flue pipe outer shell 1, avoiding dust contamination of the pipeline and preventing adhesion and blockage of the smoke passage pipeline.

[0025] Embodiment 2: As Figures 1-4As shown in the figure, a smoke inlet pipe 11 is fixedly connected to the bottom of the pipe. A first filter plate 3 is fixedly connected to the inner wall of the flue pipe housing 1. A second filter plate 31 is fixedly connected to the inner wall of the flue pipe housing 1. A third filter plate 32 is fixedly connected to the inner wall of the flue pipe housing 1. The first filter plate 3 is located below the second filter plate 31, and the second filter plate 31 is located below the third filter plate 32. The outer surface of the smoke inlet pipe 11 is fixedly connected through with a first smoke inlet pipe 24. A slag discharge port 14 is fixedly connected to the bottom of the smoke inlet pipe 11. The outer surface of the pipe is fixedly connected through with a first feed pipe 23.

[0026] The effect achieved by the entire Embodiment 2 is that the treated flue gas is discharged from the smoke outlet nozzle 13 under the sealing action of the flue sealing top 12. When the equipment has problems, the embedded flue sealing top 12 can be disassembled for easy maintenance. The waste residues and other impurities generated during the whole process can be discharged in time through the slag discharge port 14 at the bottom of the smoke inlet pipe 11 to ensure the normal operation of the system.

[0027] Working principle: When the equipment is working, the flue gas enters the inside of the flue pipe housing 1 through the smoke inlet pipe 11 and the first smoke inlet pipe 24. During the upward movement of the flue gas, it will first pass through the layers of filtration of the first filter plate 3, the second filter plate 31 and the third filter plate 32, gradually removing the impurity particles and other substances therein. At the same time, treatment substances such as denitration agents are added to the annular water channel system through the first feed pipe 23. The treatment substances flow in the first annular water channel 2, the second annular water channel 21 and the third annular water channel 22 and the first connecting pipe 25 and the second connecting pipe 26 connecting them, and are sprayed out from the first nozzle 27, the second nozzle 28 and the third nozzle 29 to carry out denitration treatment on the flue gas in the flue. The three nozzles are at different height positions and can fully contact the flue gas at different levels to ensure the comprehensiveness and uniformity of the denitration effect. The first nozzle 27 at the bottom can first carry out preliminary treatment on the flue gas just entering the flue. As the flue gas continues to rise, the second nozzle 28 and the third nozzle 29 play their roles in turn to carry out further refined treatment on the flue gas. And the three groups of nozzles are evenly arranged, and the spraying range can cover the entire pipeline. During operation, it continuously flushes the inner walls of the smoke inlet pipe 11 and the flue pipe housing 1, avoiding dust contamination of the pipeline and preventing blockage of the smoke passage pipeline due to adhesion. The treated flue gas is discharged from the smoke outlet nozzle 13 under the sealing action of the flue sealing top 12. When the equipment has problems, the embedded flue sealing top 12 can be disassembled for easy maintenance. The waste residues and other impurities generated during the whole process can be discharged in time through the slag discharge port 14 at the bottom of the smoke inlet pipe 11 to ensure the normal operation of the system.

[0028] The wiring diagrams of the first nozzle 27, the second nozzle 28, and the third nozzle 29 in the present utility model belong to the common general knowledge in the art. Their working principles are already well-known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the first nozzle 27, the second nozzle 28, and the third nozzle 29 will not be explained in detail.

[0029] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any other form. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A boiler flue gas circulating denitration device, characterized in that, Comprising: A flue duct outer shell (1), on the outer surface of the flue duct outer shell (1) is fixedly connected through penetration with a first nozzle (27), on the outer surface of the flue duct outer shell (1) is fixedly connected through penetration with a second nozzle (28), on the outer surface of the flue duct outer shell (1) is fixedly connected through penetration with a third nozzle (29), the first nozzle (27) is located below the second nozzle (28), the second nozzle (28) is located below the third nozzle (29), one end of the third nozzle (29) is welded with a first annular water channel (2), one end of the second nozzle (28) is welded with a second annular water channel (21), one end of the first nozzle (27) is welded with a third annular water channel (22), on the outer surface of the first annular water channel (2) is welded a first connecting pipe (25), the outer surfaces of the first annular water channel (2) and the second annular water channel (21) are connected and communicated through the first connecting pipe (25), on the outer surface of the second annular water channel (21) is welded a second connecting pipe (26), and the outer surfaces of the second annular water channel (21) and the third annular water channel (22) are connected through the second connecting pipe (26).

2. The boiler flue gas circulation denitration device according to claim 1, wherein: A flue duct sealing top (12) is embedded at the top of the flue duct outer shell, and a smoke outlet nozzle (13) is fixedly connected to the top of the flue duct sealing top (12).

3. The boiler flue gas circulation denitration device according to claim 2, wherein: The bottom of the flue duct outer shell (1) is fixedly connected with a smoke inlet pipe (11).

4. The boiler flue gas circulation denitration device according to claim 3, characterized in that: A first filter plate (3) is fixedly connected to the inner wall of the flue duct outer shell (1).

5. The boiler flue gas circulating denitration device according to claim 4, wherein: A second filter plate (31) is fixedly connected to the inner wall of the flue duct outer shell (1), and a third filter plate (32) is fixedly connected to the inner wall of the flue duct outer shell (1).

6. The boiler flue gas circulation denitration device according to claim 5, wherein: The first filter plate (3) is located below the second filter plate (31), and the second filter plate (31) is located below the third filter plate (32).

7. The boiler flue gas circulation denitration device according to claim 6, characterized in that: A first smoke inlet pipe (24) is fixedly connected through penetration with the outer surface of the smoke inlet pipe (11), a slag discharge port (14) is fixedly connected to the bottom of the smoke inlet pipe (11), and a first feed pipe (23) is fixedly connected through penetration with the outer surface of the pipe.

Images