Denitration ammonia injection grid

Abstract

The utility model relates to the technical field of denitration, in particular to a denitration ammonia spraying grid, and aims to solve the technical problem that in the prior art, ammonia gas is sprayed into flue gas, and high-temperature flue gas rising quickly is difficult to be uniformly mixed with the ammonia gas in a relatively wide denitration chamber, an ammonia gas pipe is communicated with a gas distribution box, and the gas distribution box is connected to the inner top wall of the denitration chamber through a bracket; the grid is connected to the inner wall of the denitration chamber, the interior of the grid is divided into a plurality of flue gas channels, each branch gas pipe extends to the lower part of the flue gas channel and is connected with the inner wall of the grid through a pipe frame, the lower end of each branch gas pipe is connected with a spray head, and the side wall of the denitration chamber at the upper part of the grid is communicated with an exhaust pipe; the interior of the denitration chamber is divided into a plurality of flue gas channels through the grilles, high-temperature flue gas enters the flue gas channels and is divided into a plurality of gas flows, the spray heads are located on the lower portions of the flue gas channels, sprayed ammonia gas and the flue gas synchronously rise along the flue gas channels, and the two kinds of gas are rubbed and mixed with the inner walls of the channels in the rising process, so that the reaction is sufficient.

Description

Technical Field

[0001] This utility model relates to the field of denitrification technology, specifically to a denitrification ammonia spray grid. Background Technology

[0002] With rapid industrialization and urbanization, the emission of large amounts of industrial flue gas has led to a continuous increase in the concentration of nitrogen oxides in the atmosphere, causing serious harm to the environment and human health. This includes the formation of acid rain and photochemical smog, as well as increased ground-level ozone concentration and exacerbation of the greenhouse effect. Against this backdrop, efficient denitrification technology has become crucial for industrial enterprises to achieve compliant emissions, and ammonia injection grilles, as key equipment in SCR denitrification systems, are playing an increasingly important role.

[0003] In the SCR denitrification process, ammonia needs to be uniformly injected into the flue gas so that it reacts with nitrogen oxides under the action of a catalyst to produce harmless nitrogen and water. The emergence of ammonia injection grids provides an effective means to achieve uniform ammonia injection and thorough mixing with flue gas.

[0004] Existing technology simply injects ammonia into the flue gas. In a relatively spacious denitrification chamber, the rapidly rising high-temperature flue gas is difficult to mix evenly with the ammonia, resulting in an incomplete reaction. Utility Model Content

[0005] The existing technology simply injects ammonia into the flue gas. However, in a relatively spacious denitrification chamber, the rapidly rising high-temperature flue gas is difficult to mix evenly with the ammonia, resulting in insufficient reaction. Therefore, this invention provides a denitrification ammonia injection grid.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification ammonia spray grille, comprising: a denitrification chamber, a flue gas pipe connected to the lower part of the denitrification chamber, an ammonia gas pipe connected to the upper part of the denitrification chamber, the ammonia gas pipe being connected to a gas distribution box, the gas distribution box being connected to the upper wall of the denitrification chamber via a bracket, a plurality of vertically arranged branch gas pipes being connected to the lower part of the gas distribution box, the grille being connected to the inner wall of the denitrification chamber, the grille being divided into a plurality of flue gas channels, each branch gas pipe extending to the lower part of the flue gas channel and connected to the inner wall of the grille via a pipe bracket, a nozzle being connected to the lower end of the branch gas pipe, and an exhaust pipe being connected to the side wall of the denitrification chamber above the grille.

[0007] Preferably, the exhaust pipe is located at the bottom of the air distribution box.

[0008] Preferably, each branch trachea in the branch trachea has a fan blade rotatably connected to its outer wall.

[0009] Preferably, the lower part of the denitrification chamber is connected to a sealed door that can be opened and closed, and the flue gas pipe is located above the sealed door.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The denitrification chamber is divided into multiple flue gas channels by a grid. The high-temperature flue gas enters the flue gas channel and is divided into multiple airflows. Since the nozzle is located at the bottom of the flue gas channel, the sprayed ammonia gas rises synchronously with the flue gas along the flue gas channel. During the rise, the two gases rub against the inner wall of the channel and mix, so that the reaction is complete.

[0012] The mixture of flue gas and ammonia gas impacts the fan blades, causing them to rotate. The rotating fan blades further mix the two gases, accelerating the mixing process and making the reaction more complete. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the structure of this utility model;

[0015] Figure 3 This is an exploded view of the structure of this utility model;

[0016] In the diagram: 1. Denitrification chamber; 2. Flue gas pipe; 3. Ammonia pipe; 4. Gas distribution box; 5. Support; 6. Branch gas pipe; 7. Grille; 8. Pipe rack; 9. Nozzle; 10. Exhaust pipe; 11. Fan blade; 12. Sealing door. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The rotary connection described in this device refers to the axial fixation of the bearing by mounting the bearing on the shaft, with a spring retaining ring groove provided on the shaft or shaft hole, and the rotation achieved by locking the elastic retaining ring in the retaining ring groove; the hinge connection refers to the connection method that allows movement through connecting parts such as hinges, pins, and short shafts.

[0019] The present invention will now be described in detail with reference to the accompanying drawings.

[0020] The following is in conjunction with the appendix Figure 1-This embodiment describes a denitrification ammonia spray grid, comprising: a denitrification chamber 1, a flue gas pipe 2 connected to the lower part of the denitrification chamber 1, an ammonia gas pipe 3 connected to the upper part of the denitrification chamber 1, the ammonia gas pipe 3 being connected to a gas distribution box 4, the gas distribution box 4 being connected to the inner top wall of the denitrification chamber 1 via a bracket 5, a plurality of vertically arranged branch gas pipes 6 being connected to the lower part of the gas distribution box 4, a grid 7 being connected to the inner wall of the denitrification chamber 1, the grid 7 being divided into a plurality of flue gas channels, each branch gas pipe 6 extending to the lower part of the flue gas channel and connected to the inner wall of the grid 7 via a pipe bracket 8, a nozzle 9 being connected to the lower end of the branch gas pipe 6, and an exhaust pipe 10 being connected to the side wall of the denitrification chamber 1 above the grid 7.

[0021] Flue gas is injected and rises through flue gas pipe 2. The denitrification chamber 1 is divided into multiple flue gas channels by the grid 7. The high-temperature flue gas enters the flue gas channel and is divided into multiple airflows. Ammonia is injected through ammonia pipe 3. The ammonia is discharged through ammonia pipe 3, gas distribution box 4, branch gas pipe 6, and nozzle 9. Since the nozzle 9 is located at the bottom of the flue gas channel, the sprayed ammonia rises synchronously with the flue gas along the flue gas channel. During the rise, the two gases rub and mix with the inner wall of the channel, so that the reaction is complete.

[0022] The exhaust pipe 10 is located at the bottom of the air distribution box 4.

[0023] The flue gas is discharged through the exhaust pipe 10, which reduces the impact of the flue gas on the upper gas box 4 and extends the service life of the gas box 4.

[0024] Each branch trachea 6 has a fan blade 11 rotatably connected to the outer wall of the branch trachea 6.

[0025] The mixture of flue gas and ammonia gas impacts the fan blade 11, causing it to rotate. The rotating fan blade 11 further mixes the two gases, accelerating the mixing speed and making the reaction more complete.

[0026] The lower part of the denitrification chamber 1 is connected to a sealing door 12 that can be opened and closed, and the flue gas pipe 2 is located above the sealing door 12.

[0027] The water and flue gas particles generated by the reaction fall into the lower part of the denitrification chamber 1 and are discharged through the opening of the sealing door 12.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A denitrification ammonia spraying grid, comprising: The denitrification chamber (1) is connected to a flue gas pipe (2) at the bottom and an ammonia pipe (3) at the top. The features are as follows: the ammonia pipe (3) is connected to the gas distribution box (4), the gas distribution box (4) is connected to the top wall of the denitrification chamber (1) through the bracket (5), the lower part of the gas distribution box (4) is connected to multiple vertically arranged branch gas pipes (6), the grid (7) is connected to the inner wall of the denitrification chamber (1), the grid (7) is divided into multiple flue gas channels, each branch gas pipe (6) extends to the lower part of the flue gas channel and is connected to the inner wall of the grid (7) through the pipe rack (8), the lower end of the branch gas pipe (6) is connected to the nozzle (9), and the side wall of the denitrification chamber (1) above the grid (7) is connected to the exhaust pipe (10).

2. The denitrification ammonia spraying grid according to claim 1, characterized in that: The exhaust pipe (10) is located at the lower part of the air distribution box (4).

3. The denitrification ammonia spraying grid according to claim 1, characterized in that: Each branch trachea (6) has a fan blade (11) rotatably connected to the outer wall of the branch trachea (6).

4. The denitrification ammonia spraying grid according to claim 1, characterized in that: The lower part of the denitrification chamber (1) is connected to a sealing door (12) that can be opened and closed, and the flue gas pipe (2) is located above the sealing door (12).

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