Device for preventing nozzle of ammonia injection grid from being blocked by accumulated dust

Abstract

The utility model discloses an ammonia injection grid's nozzle device of preventing the clogging of deposit ash, relates to denitration equipment field, including rhombic shell, the upper end of rhombic shell is equipped with a plurality of evenly distributed fixed hole, every fixed hole inside is fixedly connected with branch pipe, every branch pipe left side is equipped with the air inlet, the air inlet is equipped with the air outlet, the air outlet is equipped with the air outlet, and the air outlet is equipped with the air outlet. A baffle is fixedly connected to the right side of the inner wall of the branch pipe, a fixing plate is fixedly connected to the inner wall of the branch pipe, and a T-shaped rod face is slidably connected to the interior of the fixing plate. According to the utility model, the opening and closing of the branch pipe are controlled through the plug and the spring damping above the branch pipe, so that the branch pipe and the material conveying pipe are cleaned more quickly, gas is fed into the branch pipe through the gas pipe and the gas inlet hole to blow back, and impurities and blockages are fed back into the material conveying pipe; the problems that nitrogen oxides exceed the standard, ammonia escapes and the usage amount of ammonia water is increased due to blockage of the ammonia spraying grid are avoided.

Description

Technical Field

[0001] This utility model relates to the field of denitrification equipment, specifically to a device for preventing ash accumulation and clogging of nozzles in an ammonia spraying grid. Background Technology

[0002] Ammonia injection grilles are a key component of SCR denitrification systems, used to uniformly inject ammonia water or ammonia gas into the flue gas to reduce nitrogen oxide emissions. Their design must ensure uniform distribution, prevent clogging, resist corrosion, allow precise control of the injection volume, and adapt to different operating conditions. The performance of the ammonia injection grille directly affects the denitrification effect and system stability; therefore, its design and selection require comprehensive consideration of multiple factors.

[0003] In most existing ammonia injection grids, during the denitrification process, impurities in the flue gas naturally fall down, and the sediment easily adheres to the nozzles of the ammonia injection grid. Over time, this gradually forms a blockage, which seriously affects the full contact and effective reaction between ammonia and pollutants in the flue gas, reduces denitrification efficiency, and adversely affects the normal operation of the entire system. Therefore, this utility model proposes an anti-ash accumulation and blockage nozzle device for ammonia injection grid to solve the above problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, an anti-ash accumulation and clogging nozzle device for ammonia injection grid is provided. This technical solution addresses the issue mentioned in the background technology that, in the denitrification process, impurities in the flue gas will naturally fall, and the sediment will easily adhere to the nozzles of the ammonia injection grid. Over time, this will gradually form a blockage, which will seriously affect the full contact and effective reaction between ammonia and pollutants in the flue gas, reduce denitrification efficiency, and adversely affect the normal operation of the entire system.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A nozzle device for preventing dust accumulation and clogging of an ammonia spray grid includes a rhomboid outer shell. The upper end of the rhomboid outer shell has multiple evenly distributed fixing holes. A branch pipe is fixedly connected inside each fixing hole. An air inlet is provided on the left side of each branch pipe. A baffle is fixedly connected to the right side of the inner wall of the branch pipe. A fixing plate is fixedly connected to the inner wall of the branch pipe. A T-shaped rod is slidably connected inside the fixing plate. The upper side of the T-shaped rod is connected to the lower side of the fixing plate by a spring damping connection. The spring damping is sleeved on the outer surface of the T-shaped rod.

[0007] Preferably, a plug is fixedly connected to the top end of the T-shaped rod, and the outer surface of the plug is disposed at the top end of the branch pipe.

[0008] Preferably, a conveying pipe is fixedly connected to the inner wall of the rhomboid shell, and the interior of the conveying pipe is connected to the bottom end of the plurality of branch pipes.

[0009] Preferably, an air tube is fixedly connected to the inner wall of the rhomboid outer shell.

[0010] Preferably, the outer surface of the air tube is fixedly connected to the outer surface of the feed tube.

[0011] Preferably, the trachea is connected to the branch pipe through the air inlet.

[0012] Preferably, the side of the baffle closest to the fixing plate is fixedly connected to the fixing plate.

[0013] Preferably, both the rhomboid outer shell and the branch pipe are made of corrosion-resistant materials.

[0014] Preferably, the plug is a hollow stainless steel body or a solid stainless steel body.

[0015] Preferably, the feed pipe is connected to an ammonia-air mixing pipe, and the gas pipe is connected to a compressed gas pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, the opening and closing of the branch pipe is controlled by the plug above the branch pipe and the spring damping, making it faster to clean the branch pipe and the conveying pipe. Gas is sent into the branch pipe through the air pipe and the air inlet for back blowing, which sends impurities and blockages back into the conveying pipe, avoiding the problems of excessive nitrogen oxides, ammonia escape and increased ammonia water consumption caused by the blockage of the ammonia spray grid. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is an exploded view of the branch pipe in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the rhomboid outer shell in this utility model.

[0021] The numbers on the map are:

[0022] 1. Diamond-shaped outer shell; 2. Feed pipe; 3. Air pipe; 4. Branch pipe; 5. Baffle; 6. Air inlet; 7. Fixing plate; 8. T-shaped rod; 9. Plug; 10. Spring damping; 11. Fixing hole. Detailed Implementation

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0024] Reference Figures 1-3 As shown, an anti-dust-accumulation and clogging nozzle device for an ammonia spraying grid includes a rhomboid outer shell 1. The upper end of the rhomboid outer shell 1 has multiple evenly distributed fixing holes 11. A branch pipe 4 is fixedly connected inside each fixing hole 11. An air inlet 6 is opened on the left side of each branch pipe 4. A baffle 5 is fixedly connected to the right side of the inner wall of the branch pipe 4. A fixing plate 7 is fixedly connected to the inner wall of the branch pipe 4. A T-shaped rod 8 is slidably connected inside the fixing plate 7. The upper side of the T-shaped rod 8 is connected to the lower side of the fixing plate 7 by a spring damper 10. A spring damper 10 is sleeved on the outer surface of the T-shaped rod 8; a plug 9 is fixedly connected to the top of the T-shaped rod 8, and the outer surface of the plug 9 is set on the top of the branch pipe 4; a conveying pipe 2 is fixedly connected to the inner wall of the rhomboid shell 1, and the interior of the conveying pipe 2 is connected to the bottom end of multiple branch pipes 4; an air pipe 3 is fixedly connected to the inner wall of the rhomboid shell 1, and the outer surface of the air pipe 3 is fixedly connected to the outer surface of the conveying pipe 2; the air pipe 3 is connected to the branch pipe 4 through the air inlet 6, and the baffle 5 is fixedly connected to the fixed plate 7 on the side near the fixed plate 7;

[0025] Specifically, the rhomboid outer shell 1 secures the feed pipe 2 and the gas pipe 3. The rhomboid design of the outer shell 1 also diverts the flue gas from below to both sides, accelerating the reaction between the flue gas and ammonia and facilitating denitrification. The feed pipe 2 conveniently delivers the ammonia-air mixture needed for the reaction into the branch pipe 4. Simultaneously, the gas pipe 3 supplies the gas needed for subsequent treatment and clogging. The rhomboid outer shell 1 and the feed pipe 2 secure the branch pipe 4, and the branch pipe 4 transports the ammonia-air mixture inside the feed pipe 2, enabling multi-point spraying, increasing the contact area between the flue gas and the ammonia-air mixture, and thus increasing the reaction rate. The baffle 5 inside the pipe 4 divides the interior of the branch pipe 4 into two parts, facilitating the subsequent cleaning of the interior of the branch pipe 4 and the conveying pipe 2 with gas. The fixed plate 7 is fixed through the branch pipe 4, allowing the T-shaped rod 8 on the fixed plate 7 to slide inside the branch pipe 4. Then, the fixed plate 7 and the T-shaped rod 8 are connected together by the spring damper 10. The spring damper 10 can then continuously push the T-shaped rod 8 downward, causing the plug 9 on the T-shaped rod 8 to block the top of the branch pipe 4. At the same time, the pressure generated by the output of the ammonia-air mixture inside the branch pipe 4 pushes the plug 9 upward, so that the ammonia-air mixture can be sprayed around the plug 9, thereby increasing the reaction area. To increase the reaction rate and achieve better processing results, while the ammonia-air mixture is being transported in the branch pipe 4, the gas pipe 3 simultaneously transports gas to prevent the mixture from entering the interior of the gas pipe 3 through the air inlet 6, which would cause insufficient pressure and prevent the plug 9 from being pushed. At the same time, when cleaning the branch pipe 4 and the conveying pipe 2, the gas pipe 3 sends gas into the interior of the branch pipe 4 through the air inlet 6, and then sends it to the bottom of the plug 9 through the gap between the baffle 5 and the branch pipe 4. Subsequently, the gas pushes the ammonia-air mixture in the branch pipe 4 and the conveying pipe 2 back, and at the same time, the gas can push the impurities that are blocking the inside back into the conveying pipe 2, which is convenient for subsequent cleaning.

[0026] Reference Figures 1-3 As shown, the rhomboid outer shell 1 and the branch pipe 4 are both made of corrosion-resistant materials; the plug 9 is a hollow stainless steel body or a solid stainless steel body; the conveying pipe 2 is connected to the ammonia-air mixing pipe, and the gas pipe 3 is connected to the compressed gas pipe.

[0027] Specifically, the corrosion-resistant rhomboid outer shell 1 and branch pipe 4 can effectively prevent substances in the flue gas from damaging the rhomboid outer shell 1 and branch pipe 4 during use, and at the same time can extend the service life of the rhomboid outer shell 1 and branch pipe 4. Through two different plugs 9, the pressure required for the ammonia-air mixture transported by the branch pipe 4 can be controlled, thereby controlling the pressure that can be used when the gas cleans the branch pipe 4 and the conveying pipe 2, and adjusting the cleaning effect.

[0028] Working principle: When in use, connect the material conveying pipe 2 and the gas pipe 3 to the ammonia-air mixing pipe and the gas pipe respectively for convenient subsequent use;

[0029] The flue gas conveyed below is diverted by the rhomboid outer shell 1, causing the flue gas to flow to both sides of the rhomboid outer shell 1, thereby facilitating the treatment of the flue gas. At the same time, the ammonia-air mixture is sent into the interior of the branch pipe 4 through the conveying pipe 2. The pressure generated by the conveying pushes the plug 9 to move, so that the mixture can be sprayed out in all directions through the gap between the plug 9 and the branch pipe 4, thereby facilitating contact with the flue gas and allowing it to react with the substances in the flue gas. At the same time, spraying in all directions increases the contact area between the ammonia-air mixture and the flue gas, thereby accelerating the reaction rate.

[0030] When it is necessary to clean the branch pipe 4 and the conveying pipe 2, the supply of ammonia-air mixture to the branch pipe 4 through the conveying pipe 2 is stopped, and gas is supplied to the branch pipe 4 through the gas pipe 3. At the same time, the gas enters between the baffle 5 and the branch pipe 4 through the air inlet 6 and moves towards the plug 9. The branch pipe 4 and the conveying pipe 2 are cleaned from the position of the plug 9 to prevent blockage inside the branch pipe 4 and the conveying pipe 2. At the same time, a smaller pressure of gas is used for cleaning, which can seal the plug 9 so that the gas can only be used to clean the branch pipe 4 and the conveying pipe 2.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for preventing ash accumulation and clogging of nozzles in an ammonia spraying grid, characterized in that, The device includes a rhomboid outer shell (1), the upper end of which is provided with a plurality of evenly distributed fixing holes (11). Each fixing hole (11) is fixedly connected to a branch pipe (4). Each branch pipe (4) is provided with an air inlet (6) on its left side. A baffle (5) is fixedly connected to the right side of the inner wall of the branch pipe (4). A fixing plate (7) is fixedly connected to the inner wall of the branch pipe (4). A T-shaped rod (8) is slidably connected inside the fixing plate (7). The upper side of the T-shaped rod (8) is connected to the lower side of the fixing plate (7) by a spring damper (10). The spring damper (10) is sleeved on the outer surface of the T-shaped rod (8).

2. The anti-ash accumulation and clogging nozzle device for an ammonia spraying grid according to claim 1, characterized in that: A plug (9) is fixedly connected to the top of the T-shaped rod (8), and the outer surface of the plug (9) is set at the top of the branch pipe (4).

3. The anti-dust accumulation and clogging nozzle device for an ammonia spraying grid according to claim 2, characterized in that: The inner wall of the rhomboid shell (1) is fixedly connected to a conveying pipe (2), and the interior of the conveying pipe (2) is connected to the bottom end of a plurality of branch pipes (4).

4. The anti-dust accumulation and clogging nozzle device for an ammonia spraying grid according to claim 3, characterized in that: An air tube (3) is fixedly connected to the inner wall of the rhomboid outer shell (1).

5. The anti-dust accumulation and clogging nozzle device for an ammonia spraying grid according to claim 4, characterized in that: The outer surface of the air pipe (3) is fixedly connected to the outer surface of the feed pipe (2).

6. The anti-dust accumulation and clogging nozzle device for an ammonia spraying grid according to claim 5, characterized in that: The trachea (3) is connected to the branch pipe (4) through the air inlet (6).

7. The anti-dust accumulation and clogging nozzle device for an ammonia injection grid according to claim 1, characterized in that: The baffle (5) is fixedly connected to the fixing plate (7) on the side closest to the fixing plate (7).

8. The anti-ash accumulation and clogging nozzle device for an ammonia spraying grid according to claim 1, characterized in that: Both the rhomboid outer shell (1) and the branch pipe (4) are made of corrosion-resistant materials.

9. The anti-ash accumulation and clogging nozzle device for an ammonia spraying grid according to claim 2, characterized in that: The plug (9) is a hollow stainless steel body or a solid stainless steel body.

10. The anti-ash accumulation and clogging nozzle device for an ammonia spraying grid according to claim 4, characterized in that: The feed pipe (2) is connected to the ammonia-air mixing pipe, and the gas pipe (3) is connected to the compressed gas pipe.

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