A small flow flue gas denitration reactor inlet uniform distribution device

Abstract

The utility model discloses a small flow flue gas denitration reactor entrance equal distribution device is equipped with denitration reactor entrance, deflector and denitration reactor along the flue gas flow direction, is equipped with flue gas equal distribution mechanism between deflector and denitration reactor, flue gas equal distribution mechanism includes main part and a plurality of through -holes equal distribution on main part. Flue gas equal distribution mechanism adopts the form of steel sheet opening, and the simple structure is convenient to install, and the resistance is smaller.

Description

Technical Field

[0001] This utility model relates to the field of pollution control technology, specifically to a uniform distribution device for the inlet of a small-flow flue gas denitrification reactor. Background Technology

[0002] The denitrification reactor is the core equipment used to remove nitrogen oxides (NOx) from flue gas, and its mainstream technology is selective catalytic reduction (SCR). Uniform distribution of flue gas at the inlet of the SCR denitrification reactor (i.e., "uniform inlet distribution") is a key factor in improving denitrification efficiency, reducing ammonia slip, and extending catalyst life.

[0003] To ensure uniform distribution of flue gas at the inlet of the denitrification reactor, a utility model patent with application number CN201620105041.1, entitled "A Flue Gas Distribution Device for an SCR Denitrification Reactor," discloses a technical solution including a flue gas duct, a baffle plate assembly, and a distribution grid. The flue gas distribution device is installed on the SCR denitrification reactor, which is connected to the flue gas duct. The end of the flue gas duct near the SCR denitrification reactor is bent to form a flue bend, and the inside of the flue bend is inclined downward with a baffle plate assembly. The baffle plate assembly includes multiple parallel baffle plates arranged at equal intervals, with the interval between adjacent baffle plates ranging from 300 to 800 mm. The angle between the baffle plates and the horizontal plane is 75° to 100°. A distribution grid is installed above the catalyst layer of the SCR denitrification reactor. The flue gas uniform distribution device for SCR denitrification reactors of this invention uses a combination of baffle plate group and distribution grid to reduce pressure loss in the denitrification system, improve reaction efficiency, reduce system energy consumption, reduce the possibility of ash blockage, and improve the safety of reactor operation.

[0004] In the above scheme, the inlet of the denitrification reactor adopts the form of a rectifier grid, which is mainly made of steel plate welding and round steel reinforcement. The steel plates are welded together and the steel plates are reinforced with round steel. The welding workload is large and the processing cycle is long. When the flue gas volume is small, the grid hole spacing is reduced, and the welding rod is difficult to penetrate into the grid plate, which further makes welding difficult and increases the processing and manufacturing difficulty. Utility Model Content

[0005] The purpose of this invention is to solve the above problems and provide a uniform distribution device for the inlet of a small flow flue gas denitrification reactor, which has a simple structure, is easy to install, and has low resistance.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A flue gas denitrification reactor inlet uniform distribution device is provided, which includes a denitrification reactor inlet, a guide plate and a denitrification reactor along the flue gas flow direction. A flue gas uniform distribution mechanism is provided between the guide plate and the denitrification reactor. The flue gas uniform distribution mechanism includes a main body and a plurality of through holes uniformly distributed on the main body.

[0007] Furthermore, the diameter of the through hole is 30mm, and the distance between two adjacent through holes is 46mm.

[0008] Furthermore, the main body is provided with connecting plates around its perimeter that connect to the fixing plates on the inner wall of the denitrification reactor.

[0009] Furthermore, the connecting plate is provided with a number of connecting holes.

[0010] Furthermore, the connecting plate is provided with a rotating shaft that rotates on the connecting plate, and a swing arm is provided at the upper end of the rotating shaft.

[0011] Furthermore, the lower end of the rotating shaft is provided with a hexagonal prism portion.

[0012] The beneficial effects of this utility model are: 1. This utility model includes a denitrification reactor inlet, a guide plate, and a denitrification reactor along the flue gas flow direction. A flue gas equalization mechanism is provided between the guide plate and the denitrification reactor. The flue gas equalization mechanism includes a main body and several through holes evenly distributed on the main body. The flue gas equalization mechanism adopts the form of a perforated steel plate, which has a simple structure, is easy to install, and has low resistance. According to flow field simulation analysis, the resistance of this novel equalization device is below 50 Pa. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 4 This is a front view of Embodiment 2 of the present utility model.

[0015] In the diagram: 1. Denitrification reactor inlet; 2. Baffle plate; 3. Denitrification reactor; 4. Main body; 5. Through hole; 6. Connecting plate; 7. Connecting hole; 8. Rotating shaft; 9. Swing arm; 10. Hexagonal prism. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0017] Example 1: like Figure 1 and Figure 2 As shown, a flue gas denitrification reactor inlet uniform distribution device is provided. Along the flue gas flow direction, a denitrification reactor inlet 1, a guide plate 2, and a denitrification reactor 3 are arranged. A flue gas uniform distribution mechanism is provided between the guide plate 2 and the denitrification reactor 3. The flue gas uniform distribution mechanism includes a main body 4 and several through holes 5 evenly distributed on the main body 4. The flue gas uniform distribution mechanism adopts the form of a perforated steel plate, which is simple in structure, easy to install, and has low resistance. Flow field simulation analysis shows that the resistance of this novel uniform distribution device is below 50 Pa. The steel plate material of the main body 4 is consistent with that of the denitrification reactor. The flue gas uniform distribution mechanism is used in conjunction with the denitrification reactor inlet guide plate.

[0018] The diameter of the through hole 5 is 30mm, the distance between two adjacent through holes 5 is 46mm, and the thickness of the steel plate is calculated based on the size of the denitrification reactor.

[0019] like Figure 2 As shown, the main body 4 is provided with connecting plates 6 around its perimeter that are connected to the fixing plates on the inner wall of the denitrification reactor 3.

[0020] The connecting plate 6 is provided with several connecting holes 7. The connecting plate is connected to the fixing plate on the inner wall of the denitrification reactor 3 by bolts, which makes replacement convenient.

[0021] Example 2: like Figure 3 and Figure 4 As shown, the connecting plate 6 is provided with a rotating shaft 8 that rotates on the connecting plate 6. The upper end of the rotating shaft 8 is provided with a swing arm 9. After the connecting plate 6 contacts the fixed plate on the inner wall of the denitrification reactor 3, the rotating shaft 8 rotates, and the swing arm 9 contacts the upper surface of the fixed plate on the inner wall of the denitrification reactor 3, thereby fixing the main body 4.

[0022] The lower end of the rotating shaft 8 is provided with a hexagonal prism part 10, which facilitates the rotation of the rotating shaft 8.

[0023] The rest of the structure is the same as in Example 1.

[0024] In the description of this utility model, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A flue gas denitrification reactor inlet uniform distribution device, comprising a denitrification reactor inlet (1), a guide plate (2), and a denitrification reactor (3) arranged along the flue gas flow direction, wherein a flue gas uniform distribution mechanism is provided between the guide plate (2) and the denitrification reactor (3), characterized in that, The flue gas distribution mechanism includes a main body (4) and a number of through holes (5) evenly distributed on the main body (4).

2. The inlet uniform distribution device for a small-flow flue gas denitrification reactor as described in claim 1, characterized in that, The diameter of the through hole (5) is 30 mm, and the distance between two adjacent through holes (5) is 46 mm.

3. The inlet uniform distribution device for a small-flow flue gas denitrification reactor as described in claim 1, characterized in that, The main body (4) is provided with connecting plates (6) around its perimeter that are connected to the fixing plates on the inner wall of the denitrification reactor (3).

4. The inlet uniform distribution device for a small-flow flue gas denitrification reactor as described in claim 3, characterized in that, The connecting plate (6) is provided with a number of connecting holes (7).

5. The inlet uniform distribution device for a small-flow flue gas denitrification reactor as described in claim 3, characterized in that, The connecting plate (6) is provided with a rotating shaft (8) that rotates on the connecting plate (6), and a swing arm (9) is provided at the upper end of the rotating shaft (8).

6. The inlet uniform distribution device for a small-flow flue gas denitrification reactor as described in claim 5, characterized in that, The lower end of the rotating shaft (8) is provided with a hexagonal prism part (10).

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