Rotary cement kiln tail gas denitration ammonia water spraying device

Abstract

The utility model discloses a cement rotary kiln tail gas denitration ammonia water spraying device which comprises a driving box, three spraying pipes are arranged below the driving box, a plurality of atomizing nozzles are arranged on the outer side of each spraying pipe, a motor is installed at the upper end of the driving box, a rotatable rotating shaft is arranged in the driving box in a penetrating mode, and the rotating shaft is connected with the driving box. An output shaft of the motor penetrates through the driving box and is fixedly connected with the upper end of a rotating shaft, a turbulent flow impeller is arranged below the driving box, the lower end of the rotating shaft penetrates through the driving box and is fixedly connected with the upper end of the turbulent flow impeller, and a rotating mechanism is connected between the rotating shaft and the three spraying pipes and used for driving the three spraying pipes to rotate at the same time. A liquid supply mechanism is arranged in the driving box, and the liquid supply mechanism is connected with the top ends of the three spraying pipes respectively, and the device has the advantages of being reasonable in structure, wide in spraying range and high in treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas treatment technology, and in particular to a denitrification ammonia water injection device for cement rotary kiln tail gas. Background Technology

[0002] During cement production, cement kilns generate a large amount of nitrogen oxide-containing exhaust gas. Direct emission of this gas causes serious pollution to the natural environment, necessitating denitrification treatment. Current technologies commonly employ ammonia spraying via atomizing nozzles to treat nitrogen oxides in the flue gas. However, atomizing nozzles alone have limitations; they cannot cover the entire area, leaving some flue gas untreated and reducing treatment efficiency. To address these issues, a solution is proposed below. Utility Model Content

[0003] The purpose of this invention is to provide a cement rotary kiln tail gas denitrification ammonia water injection device, which has the advantages of wide spray range and high treatment efficiency.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A cement rotary kiln tail gas denitrification ammonia water injection device includes a drive box, three spray pipes are arranged below the drive box, and several atomizing nozzles are arranged on the outer side of each spray pipe. A motor is installed at the upper end of the drive box, and a rotatable shaft passes through the drive box. The output shaft of the motor passes through the drive box and is fixedly connected to the upper end of the shaft. A turbulence impeller is arranged below the drive box, and the lower end of the shaft passes through the drive box and is fixedly connected to the upper end of the impeller. A rotating mechanism is connected between the shaft and the three spray pipes to drive the three spray pipes to rotate simultaneously. A liquid supply mechanism is arranged inside the drive box and is connected to the top end of each of the three spray pipes.

[0006] Preferably, the rotating mechanism includes a main gear and three moving gears. The main gear is fixed on the rotating shaft, the upper ends of the three nozzles are respectively inserted into the drive box, and the three moving gears are respectively fixed on the three nozzles. The main gear meshes with the three moving gears respectively.

[0007] Preferably, the liquid supply mechanism includes a liquid supply pipe disposed in the drive box, an injection pipe connected to the upper end of the drive box and connected to the liquid supply pipe, and three distributing pipes connected to the lower end of the liquid supply pipe, the three distributing pipes respectively passing through the upper ends of the three spray pipes.

[0008] Preferably, the drive box is provided with three support seats, each of which is provided with a rotatable support block. The three nozzles pass through the three support seats and are fixedly connected to the support blocks respectively.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. Ammonia water is supplied to three spray pipes through a liquid supply mechanism and sprayed out through several atomizing nozzles. When the flue gas containing nitrogen oxides passes through the flue, it will be denitrified by the atomized ammonia water. The rotating mechanism can drive the three spray pipes to rotate simultaneously, so as to realize the rotational spraying of atomized ammonia water. This allows the atomized ammonia water to be sprayed more comprehensively in the flue, thus enabling more comprehensive contact and reaction with the nitrogen oxides in the flue gas, thereby improving the treatment quality of the flue gas and further enhancing the practicality of the ammonia water injection device.

[0011] 2. The rotation of the motor can drive the shaft to rotate, which in turn drives the turbulence impeller to rotate. Therefore, the rotation of the turbulence impeller can accelerate the flow of air in the flue, thereby speeding up the contact between the flue gas and the atomized ammonia water, thus improving the efficiency of flue gas treatment and facilitating its widespread use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0013] Figure 2 This is a schematic diagram of the internal structure of the drive box in the embodiment;

[0014] Figure 3 This is a schematic diagram of the turbulence impeller in the embodiment.

[0015] Reference numerals in the attached drawings: 1. Drive box; 2. Nozzle; 3. Atomizing nozzle; 4. Motor; 5. Rotating shaft; 6. Turbulent impeller; 7. Rotating mechanism; 8. Liquid supply mechanism; 9. Main gear; 10. Moving gear; 11. Liquid supply pipe; 12. Liquid injection pipe; 13. Liquid distribution pipe; 14. Support base; 15. Support block. Detailed Implementation

[0016] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model's concept should be protected. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from the geometric center of a specific component.

[0017] like Figures 1 to 3As shown, a cement rotary kiln tail gas denitrification ammonia water injection device includes a drive box 1. Three spray pipes 2 are arranged below the drive box 1. Several atomizing nozzles 3 are arranged on the outer side of each spray pipe 2. A liquid supply mechanism 8 is arranged inside the drive box 1, and the liquid supply mechanism 8 is connected to the top of the three spray pipes 2 respectively. The injection device is installed on one side of the flue of the cement rotary kiln tail gas, that is, the drive box 1 is installed on the outer wall of the flue, and the three spray pipes 2 are located inside the flue. Ammonia water is supplied to the three spray pipes 2 through the liquid supply mechanism 8 and sprayed out through several atomizing nozzles 3. At this time, the flue gas containing nitrogen oxides will be denitrified by the atomized ammonia water when it passes through the flue.

[0018] A motor 4 is installed at the upper end of the drive box 1. A rotatable shaft 5 passes through the drive box 1. The output shaft of the motor 4 passes through the drive box 1 and is fixedly connected to the upper end of the shaft 5. A turbulence impeller 6 is installed at the lower end of the drive box 1. The lower end of the shaft 5 passes through the drive box 1 and is fixedly connected to the upper end of the turbulence impeller 6. The rotation of the motor 4 can drive the shaft 5 to rotate, which in turn drives the turbulence impeller 6 to rotate. Therefore, the rotation of the turbulence impeller 6 can accelerate the flow of air in the flue, thereby accelerating the contact between the flue gas and the atomized ammonia water. This can improve the efficiency of flue gas treatment and facilitate its widespread use.

[0019] A rotating mechanism 7 is connected between the rotating shaft 5 and the three spray pipes 2 to drive the three spray pipes 2 to rotate simultaneously. The rotating mechanism 7 can drive the three spray pipes 2 to rotate simultaneously, thus realizing the rotational spraying of atomized ammonia water. This allows the atomized ammonia water to be sprayed more comprehensively in the flue, thus enabling more comprehensive contact and reaction with nitrogen oxides in the flue gas, thereby improving the treatment quality of the flue gas and further enhancing the practicality of the ammonia water injection device.

[0020] The rotating mechanism 7 includes a main gear 9 and three moving gears 10. The main gear 9 is fixed on the rotating shaft 5. The upper ends of the three nozzles 2 are respectively inserted into the drive housing 1, and the three moving gears 10 are respectively fixed on the three nozzles 2. The main gear 9 meshes with the three moving gears 10. Rotation of the rotating shaft 5 can drive the main gear 9 to rotate, thereby driving the three moving gears 10 to rotate simultaneously, and ultimately driving the three nozzles 2 to rotate simultaneously. The drive housing 1 is provided with three support seats 14. Each support seat 14 is provided with a rotatable support block 15. The three nozzles 2 are respectively inserted through the three support seats 14 and are respectively fixedly connected to the support blocks 15. When the three nozzles 2 rotate, they can drive the three support blocks 15 to rotate simultaneously, and the three support seats 14 and support blocks 15 can support the nozzles 2.

[0021] The liquid supply mechanism 8 includes a liquid supply pipe 11 installed in the drive box 1. The upper end of the drive box 1 is connected to an injection pipe 12, which is connected to the liquid supply pipe 11. The lower end of the liquid supply pipe 11 is connected to three distribution pipes 13, which are respectively installed at the upper ends of three spray pipes 2. The injection pipe 12 can be connected to an ammonia supply device (not shown in the figure) to supply ammonia. The injection pipe 12 can deliver ammonia into the liquid supply pipe 11, and finally deliver it into the three spray pipes 2 through the three distribution pipes 13. Finally, atomized ammonia can be sprayed out through several atomizing nozzles 3. The ammonia supply device is existing technology and will not be described in detail.

[0022] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cement rotary kiln tail gas denitrification ammonia water injection device, characterized in that, The device includes a drive box (1), with three nozzles (2) arranged below the drive box (1). Each nozzle (2) has several atomizing nozzles (3) arranged on its outer side. A motor (4) is installed at the upper end of the drive box (1). A rotatable shaft (5) is installed inside the drive box (1). The output shaft of the motor (4) passes through the drive box (1) and is fixedly connected to the upper end of the shaft (5). A turbulence impeller (6) is arranged below the drive box (1). The lower end of the shaft (5) passes through the drive box (1) and is fixedly connected to the upper end of the turbulence impeller (6). A rotating mechanism (7) is connected between the shaft (5) and the three nozzles (2) to drive the three nozzles (2) to rotate simultaneously. A liquid supply mechanism (8) is installed inside the drive box (1) and is connected to the top of each of the three nozzles (2).

2. The ammonia water injection device for denitrification of cement rotary kiln tail gas according to claim 1, characterized in that, The rotating mechanism (7) includes a main gear (9) and three moving gears (10). The main gear (9) is fixed on the rotating shaft (5). The upper ends of the three nozzles (2) are respectively inserted into the drive box (1), and the three moving gears (10) are respectively fixed on the three nozzles (2). The main gear (9) meshes with the three moving gears (10) respectively.

3. The ammonia water injection device for denitrification of cement rotary kiln tail gas according to claim 2, characterized in that, The liquid supply mechanism (8) includes a liquid supply pipe (11) installed in the drive box (1). The upper end of the drive box (1) is connected to an injection pipe (12), and the injection pipe (12) is connected to the liquid supply pipe (11). The lower end of the liquid supply pipe (11) is connected to three distributing pipes (13), and the three distributing pipes (13) are respectively installed at the upper ends of the three spray pipes (2).

4. The ammonia water injection device for denitrification of cement rotary kiln tail gas according to claim 3, characterized in that, The drive box (1) is provided with three support seats (14), and each support seat (14) is provided with a rotatable support block (15). The three nozzles (2) pass through the three support seats (14) respectively and are fixedly connected to the support blocks (15).

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