Kiln tail gas SCR denitration device

Abstract

The utility model discloses a kiln tail flue gas SCR denitration device, including the reaction box of taking off, be equipped with the air -blowing fan in the reaction box of taking off and be located above the air inlet pipeline, the lateral surface of rotating lever is annular array and has a plurality of mixing plate, be equipped with a plurality of fairing below rotating lever, install the air -suction fan below fairing, be equipped with a plurality of catalyst reactor body and put below the air -suction fan, when gas enters the reaction box of taking off and drive rotating lever rotation, drive mixing plate swing and evenly dispersed in the reaction box of taking off, the air -blowing fan of subsequent upper will blow gas downward, under the action of fairing, gas dispersion flow will be, the air -suction fan will suck gas to the catalyst reactor body below and carry out the denitration on, thereby make flue gas after entering the denitration reactor distribution even, make flue gas and reducing agent and catalyst contact fully, improve denitration efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of cement production equipment, specifically to a kiln tail flue gas SCR denitrification device. Background Technology

[0002] During cement production, rotary kiln combustion produces a large amount of kiln tail gas containing nitrogen oxides (NOx). Nitrogen oxides are one of the main components of air pollutants, and direct emission will cause serious environmental pollution, forming problems such as acid rain and photochemical reactions. Currently, the commonly used SCR denitrification technology uses reducing agents such as ammonia or urea to reduce nitrogen oxides to nitrogen and water under the action of a catalyst.

[0003] In existing SCR denitrification devices for kiln tail flue gas, the flue gas is unevenly distributed after entering the denitrification reactor, resulting in insufficient contact between the flue gas and the reducing agent and catalyst in some areas, leading to low denitrification efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a kiln tail flue gas SCR denitrification device to solve the technical problem in existing denitrification devices where the flue gas is unevenly distributed after entering the denitrification reactor, resulting in insufficient contact between the flue gas and the reducing agent and catalyst in some areas, and low denitrification efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A kiln tail flue gas SCR denitrification device includes a denitrification reaction chamber. A filter plate is fixedly installed at the upper end of the denitrification reaction chamber. An air inlet pipe is provided on one side of the upper end of the denitrification reaction chamber, and an exhaust pipe is provided on one side of the lower end of the denitrification reaction chamber. An air blowing fan is installed above the air inlet pipe inside the denitrification reaction chamber. A rotating rod is rotatably installed at the air inlet pipe inside the denitrification reaction chamber. Multiple mixing plates are arranged in a ring on the side surface of the rotating rod. Multiple guide plates are provided below the rotating rod. An air suction fan is installed below the guide plates. Multiple catalyst reactor bodies are installed below the air suction fan.

[0007] As a further embodiment of this utility model, an induced draft fan is installed inside the air intake pipe.

[0008] As a further embodiment of this utility model, a mounting base is provided at the bottom of the rotating rod inside the de-pinning reaction chamber, and the rotating rod is rotatably mounted on the upper surface of the mounting base.

[0009] As a further embodiment of this utility model, support rods are fixedly connected to all four sides of the mounting base side surface, and the other ends of the four support rods are fixedly connected to the inner surface of the de-pin reaction chamber. The guide plates are arrayed within the mounting frame.

[0010] As a further embodiment of this utility model, a mounting frame is fixedly installed inside the denitrification reaction chamber below the mounting base, and multiple guide plates are evenly arrayed within the mounting frame.

[0011] As a further embodiment of this utility model, a connecting rod is rotatably connected to the upper end of the rotating rod, and the rotating rod and the connecting rod are connected in a longitudinal and transverse transmission manner.

[0012] As a further embodiment of this utility model, the other end of the connecting rod rotates through to the outside of the de-pinning reaction chamber, and a motor for driving the connecting rod is fixedly installed on one side surface of the de-pinning reaction chamber.

[0013] As a further embodiment of this utility model, a first bevel gear is fixedly installed at one end of the connecting rod located inside the de-pin reaction chamber, and a second bevel gear is fixedly installed at the upper end of the rotating rod, with the first bevel gear and the second bevel gear meshing.

[0014] Compared with existing technologies, the SCR denitrification device for kiln tail flue gas provided by this utility model has the following beneficial effects:

[0015] During the denitrification process, gas enters the denitrification reaction chamber through the inlet pipe. As the gas enters the chamber, it drives the rotating rod to rotate, causing the mixing plate to oscillate and evenly disperse the gas within the chamber. Subsequently, the upper air blower blows the gas downwards, and the gas is dispersed and flows under the action of the guide plate. At the same time, the suction fan draws the gas onto the catalyst reactor body below for denitrification and discharges it through the exhaust pipe. This ensures that the flue gas is evenly distributed after entering the denitrification reactor, allowing the flue gas to fully contact the reducing agent and catalyst, thereby improving the denitrification efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0019] Figure 3 This is an exploded structural diagram of an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the guide plate in an embodiment of this utility model.

[0021] Reference numerals in the attached diagram: 1. Denitrification reaction chamber; 2. Air inlet pipe; 3. Filter plate; 4. Air blower; 5. Air intake fan; 6. Mounting frame; 7. Guide plate; 8. Mounting base; 9. Support rod; 10. Rotating rod; 11. Mixing plate; 12. First bevel gear; 13. Second bevel gear; 14. Connecting rod; 15. Motor; 16. Catalyst reactor body; 17. Discharge pipe; 18. Exhaust fan. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention 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 the embodiments of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0025] See Figure 1-4 As shown in the figure, an embodiment of the present invention provides a kiln tail flue gas SCR denitrification device, including a denitrification reaction chamber 1. A filter plate 3 is fixedly installed through the upper end of the denitrification reaction chamber 1. An air inlet pipe 2 is provided on one side of the upper end of the denitrification reaction chamber 1, and an exhaust pipe 17 is provided on one side of the lower end of the denitrification reaction chamber 1. An air blowing fan 4 is installed above the air inlet pipe 2 inside the denitrification reaction chamber 1. A rotating rod 10 is rotatably installed at the air inlet pipe 2 inside the denitrification reaction chamber 1. Multiple mixing plates 11 are arranged in a ring on the side surface of the rotating rod 10. Multiple guide plates 7 are provided below the rotating rod 10. An air suction fan 5 is installed below the guide plates 7. Multiple catalyst reactor bodies 16 are installed below the air suction fan 5.

[0026] In order to improve the air intake efficiency of the air intake pipe 2, an induced draft fan 18 is installed in the air intake pipe 2, so as to facilitate the dispersion of gas after it enters the denitrification reaction chamber 1.

[0027] In order to enable the rotating rod 10 to be rotatably installed inside the depinning reaction chamber 1, a mounting base 8 is provided at the bottom of the rotating rod 10 inside the depinning reaction chamber 1. The rotating rod 10 is rotatably installed on the upper surface of the mounting base 8, which provides support for the rotating rod 10, so that the rotating rod 10 is rotatably installed inside the depinning reaction chamber 1.

[0028] To facilitate the support of the mounting base 8, support rods 9 are fixedly connected to all four sides of the side surface of the mounting base 8. The other end of each of the four support rods 9 is fixedly connected to the inner surface of the depin-removing reaction chamber 1. The guide plates 7 are arrayed within the mounting frame 6. The four support rods 9 secure the mounting base 8 within the depin-removing reaction chamber 1, improving the stability of the rotating rod 10 during operation.

[0029] To improve the gas dispersion effect, a mounting frame 6 is fixedly installed inside the denitrification reaction chamber 1 below the mounting base 8. Multiple guide plates 7 are evenly arrayed in the mounting frame 6, which disperses the gas as it passes through, facilitating the denitrification process.

[0030] A connecting rod 14 is rotatably connected to the upper end of the rotating rod 10, and the rotating rod 10 and the connecting rod 14 are connected in a longitudinal and transverse transmission manner. In order to facilitate the rotation of the rotating rod 10, the other end of the connecting rod 14 extends through to the outside of the de-pinning reaction chamber 1, so that the connecting rod 14 can be driven to rotate outside the de-pinning reaction chamber 1. When the connecting rod 14 rotates, it drives the rotating rod 10 to rotate, which facilitates the rotation of the rotating rod 10.

[0031] To facilitate the rotation of the connecting rod 14, the other end of the connecting rod 14 extends through the outside of the de-pinning reaction chamber 1. A motor 15 for driving the connecting rod 14 is fixedly installed on one side surface of the de-pinning reaction chamber 1. When the motor 15 is started, it drives the connecting rod 14 to rotate, thereby facilitating the rotation of the rotating rod 10 and improving the gas dispersion effect.

[0032] To drive the rotating rod 10 to rotate when the connecting rod 14 rotates, a first bevel gear 12 is fixedly installed at one end of the connecting rod 14 inside the depinning reaction chamber 1, and a second bevel gear 13 is fixedly installed at the upper end of the rotating rod 10. The first bevel gear 12 and the second bevel gear 13 mesh with each other. When the connecting rod 14 rotates, it drives the first bevel gear 12 and the second bevel gear 13 to rotate, thereby driving the rotating rod 10 to rotate, causing the mixing plate 11 to swing and disperse the gas.

[0033] During the denitrification process, gas enters the denitrification reaction chamber 1 through the inlet pipe 2. When the gas enters the denitrification reaction chamber 1, it drives the rotating rod 10 to rotate, causing the mixing plate 11 to swing and evenly disperse the gas in the denitrification reaction chamber 1. Then, the blower 4 above blows the gas downwards, and under the action of the guide plate 7, the gas is dispersed and flows. At the same time, the suction fan 5 sucks the gas onto the catalyst reactor body 16 below for denitrification and discharges it through the discharge pipe 17. This ensures that the flue gas is evenly distributed after entering the denitrification reactor, allowing the flue gas to fully contact the reducing agent and catalyst, thereby improving the denitrification efficiency.

[0034] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A kiln tail flue gas SCR denitrification device, comprising a denitrification reaction chamber (1), characterized in that: The denitrification reaction chamber (1) has a filter plate (3) installed through and fixed at the upper end. An air inlet pipe (2) is provided on one side of the upper end of the denitrification reaction chamber (1). An exhaust pipe (17) is provided on one side of the lower end of the denitrification reaction chamber (1). An air blower (4) is installed above the air inlet pipe (2) inside the denitrification reaction chamber (1). A rotating rod (10) is rotatably installed at the air inlet pipe (2) inside the denitrification reaction chamber (1). Multiple mixing plates (11) are arranged in a ring on the side surface of the rotating rod (10). Multiple guide plates (7) are provided below the rotating rod (10). An air intake fan (5) is installed below the guide plate (7). Multiple catalyst reactor bodies (16) are installed below the air intake fan (5).

2. The kiln tail gas SCR denitration device according to claim 1, characterized in that: An induced draft fan (18) is installed inside the air intake pipe (2).

3. The kiln tail gas SCR denitration device according to claim 2, characterized in that: The denitrification reaction chamber (1) is provided with a mounting base (8) located at the bottom of the rotating rod (10), and the rotating rod (10) is rotatably mounted on the upper surface of the mounting base (8).

4. The kiln tail gas SCR denitration device according to claim 3, characterized in that: The mounting base (8) has four fixed support rods (9) on its side surface. The other end of each of the four support rods (9) is fixedly connected to the inner surface of the de-pin reaction chamber (1). The guide plates (7) are arrayed in the mounting frame (6).

5. The kiln tail gas SCR denitration device according to claim 4, characterized in that: The denitrification reaction chamber (1) is fixedly installed with a mounting frame (6) below the mounting base (8), and multiple guide plates (7) are evenly arrayed in the mounting frame (6).

6. The kiln tail gas SCR denitration device according to claim 5, characterized in that: The upper end of the rotating rod (10) is rotatably connected to the connecting rod (14), and the rotating rod (10) and the connecting rod (14) are connected in a longitudinal and transverse transmission manner.

7. The kiln tail gas SCR denitration device according to claim 6, characterized in that: The other end of the connecting rod (14) rotates through to the outside of the de-pinning reaction chamber (1), and a motor (15) for driving the connecting rod (14) is fixedly installed on one side surface of the de-pinning reaction chamber (1).

8. The kiln tail gas SCR denitration device according to claim 7, characterized in that: The connecting rod (14) is fixedly installed with a first bevel gear (12) at one end inside the de-pinning reaction chamber (1), and a second bevel gear (13) is fixedly installed at the upper end of the rotating rod (10). The first bevel gear (12) and the second bevel gear (13) mesh with each other.

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