Sintering flue gas low-temperature SCR denitration device

Abstract

The utility model discloses a kind of sintering flue gas low-temperature SCR denitration device, it is related to denitration device technical field, including jar body, the outer wall of the jar body is fixedly connected with urea feeding pipe, the front side of the jar body is provided with clamping structure, the front of the clamping structure is provided with air inlet pipe, the inner surface of the jar body is fixedly connected with fixed ring, the outer wall of the jar body is fixedly connected with motor, the output shaft of the motor is fixedly connected with bevel gear, the outer wall of the bevel gear is engaged with bevel gear ring. The utility model can rotate and spray urea by the cooperation of fixed ring, motor, swivel ring, bevel gear ring, bevel gear, rotating block, spray head and rotating ring, and urea solution is in full range, multi-angle dispersion state in flue, can evenly cover entire flue cross section, compared with fixed direction spraying, rotating spray head can ensure that urea and nitrogen oxides in flue gas are in full contact, avoid appearing mixed blind area, ensure that reaction occurs evenly at each place of flue.

Description

Technical Field

[0001] This utility model relates to the field of denitrification equipment technology, specifically to a low-temperature SCR denitrification device for sintering flue gas. Background Technology

[0002] The low-temperature SCR denitrification unit for sintering flue gas is mainly used to treat nitrogen oxides generated during the sintering process in the steel industry. Urea is usually used as a substitute reducing agent. Urea decomposes at high temperature to produce ammonia gas, which participates in the reaction. The existing technology has the following problems: The existing equipment cannot be quickly connected and installed in the air inlet pipe during use. If traditional and cumbersome connection methods are used during the initial installation of the equipment, such as requiring long-term welding and multiple calibrations, the installation time will be greatly increased. This may not only delay the delivery time of the entire denitrification project, but also prevent the sintering production line from starting production on time due to waiting for the denitrification equipment to be put into use. In addition, the existing equipment cannot rotate to spray urea. The traditional non-rotating spraying method may result in uneven distribution of urea in the flue, which will prevent nitrogen oxides in some areas from fully contacting and reacting with urea, thereby reducing the overall denitrification efficiency. Utility Model Content

[0003] The main purpose of this invention is to provide a low-temperature SCR denitrification device for sintering flue gas, which can effectively solve the problem.

[0004] To achieve the above objectives, the technical solution adopted in this utility model is as follows: A low-temperature SCR denitrification device for sintering flue gas includes a tank body, a urea feeding pipe fixedly connected to the outer wall of the tank body, a snap-fit ​​structure provided on the front side of the tank body, an air inlet pipe provided in front of the snap-fit ​​structure, a fixing ring fixedly connected to the inner surface of the tank body, and a motor fixedly connected to the outer wall of the tank body.

[0005] Preferably, the output shaft of the motor is fixedly connected to a bevel gear, the outer wall of the bevel gear is meshed with a bevel gear ring, and a rotating ring is fixedly connected to the rear side of the bevel gear ring.

[0006] Preferably, the outer wall of the rotating ring is rotatably connected to the fixed ring, a rotating ring is fixedly connected to the inner surface of the rotating ring, the outer wall of the rotating ring is rotatably connected to the fixed ring, and a connecting ring is fixedly connected to the inner surface of the rotating ring.

[0007] Preferably, the front side of the connecting ring is rotatably connected to a plurality of spray heads, the rear end of the spray heads is fixedly connected to a rotating block, and the outer wall of the urea feeding pipe is rotatably connected to the rotating block.

[0008] Preferably, the snap-fit ​​structure includes a snap-fit ​​base, the inner surface of which is movably connected to the air intake pipe, two positioning posts fixedly connected to the front side of the snap-fit ​​base, two positioning plates fixedly connected to the outer wall of the air intake pipe, and the outer walls of the positioning posts being movably connected to the positioning plates.

[0009] Preferably, a connecting rod is slidably connected to the front side of the card holder, and movable blocks are fixedly connected to both ends of the connecting rod. The outer wall of the movable block is slidably connected to the card holder. An inclined groove is opened through the left side of the movable block, and a guide post is slidably connected to the inner surface of the inclined groove. A card block is fixedly connected to the outer wall of the guide post.

[0010] Preferably, the inner surface of the card holder is fixedly connected with a plurality of connecting columns, the outer wall of the connecting columns is slidably connected to the card block, the outer wall of the connecting columns is sleeved with a spring, one end of the spring is fixedly connected to the card holder, the other end of the spring is fixedly connected to the card block, and the outer wall of the card block is movably connected to the annular card groove.

[0011] Compared with the prior art, this utility model has the following advantages: 1. This utility model provides a low-temperature SCR denitrification device for sintering flue gas. Through the cooperation of a fixed ring, a motor, a rotating ring, a bevel gear ring, a bevel gear, a rotating block, a spray nozzle and the rotating ring, urea can be sprayed in a rotating manner. The rotating spray makes the urea solution dispersed in the flue in an all-round and multi-angle state, which can evenly cover the entire cross-section of the flue. Compared with fixed-direction spraying, the rotating nozzle can ensure that the urea and the nitrogen oxides in the flue gas are in full contact, avoid the formation of mixing blind zones, and ensure that the reaction occurs evenly in all parts of the flue.

[0012] 2. This utility model provides a low-temperature SCR denitrification device for sintering flue gas. Through the cooperation of the clamping base, movable block, inclined groove, guide column, connecting column, clamping block, spring and connecting rod, the air inlet pipe can be quickly connected and installed. In the construction process of the denitrification device, the quick connection and installation of the air inlet pipe can greatly reduce the installation time and enable the denitrification device to be put into use more quickly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the fixing ring in this utility model; Figure 4 This is a schematic diagram of the limiting structure for this utility model; Figure 5 This is an exploded view of part of the structure of this utility model; Figure 6 This is a schematic diagram of the snap-fit ​​structure for this practical application.

[0014] In the diagram: 1. Tank body; 2. Urea feeding pipe; 3. Clamping structure; 4. Air inlet pipe; 5. Fixing ring; 6. Motor; 7. Rotating ring; 8. Bevel gear ring; 9. Bevel gear; 10. Rotating block; 11. Spray head; 12. Rotating ring; 13. Positioning post; 14. Positioning plate; 15. Annular groove; 16. Connecting ring; 31. Clamping base; 32. Movable block; 33. Inclined groove; 34. Guide post; 35. Connecting post; 36. Clamping block; 37. Spring; 38. Connecting rod. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific implementation methods.

[0016] like Figure 1-2 As shown, this utility model provides a low-temperature SCR denitrification device for sintering flue gas, including a tank 1. A urea feeding pipe 2 is fixedly connected to the outer wall of the tank 1. A snap-fit ​​structure 3 is provided on the front side of the tank 1. An air inlet pipe 4 is provided in front of the snap-fit ​​structure 3. A fixing ring 5 is fixedly connected to the inner surface of the tank 1. A motor 6 is fixedly connected to the outer wall of the tank 1. The tank 1 is the core component of the entire denitrification device, providing space for the reaction. The urea feeding pipe 2 is used to transport urea into the device, providing a source of reducing agent for the denitrification reaction. The snap-fit ​​structure 3 is located on the front side of the tank 1, and its function is to realize the quick connection and fixation of the air inlet pipe 4 to the tank 1, which facilitates the installation and disassembly of the air inlet pipe and the assembly and maintenance of the entire device. The fixing ring 5 is fixed on the inner surface of the tank 1, providing support and positioning for components such as the rotating ring 7 and the rotating ring 12, ensuring their stable rotation. The motor 6 is installed on the outer wall of the tank 1, serving as a power source to provide power for the subsequent rotating urea spraying mechanism.

[0017] like Figure 3-4As shown, this utility model provides a technical solution: Preferably, the output shaft of the motor 6 is fixedly connected to a bevel gear 9, the outer wall of the bevel gear 9 is meshed with a bevel ring 8, the rear side of the bevel ring 8 is fixedly connected to a rotating ring 7, the outer wall of the rotating ring 7 is rotatably connected to a fixed ring 5, the inner surface of the rotating ring 7 is fixedly connected to a rotating ring 12, the outer wall of the rotating ring 12 is rotatably connected to the fixed ring 5, the inner surface of the rotating ring 12 is fixedly connected to a connecting ring 16, the front side of the connecting ring 16 is rotatably connected to multiple spray nozzles 11, the rear end of the spray nozzles 11 is fixedly connected to a rotating block 10, the outer wall of the urea feeding pipe 2 is rotatably connected to the rotating block 10, after the motor 6 starts, its output shaft drives the bevel gear 9 to rotate, since the bevel gear 9 and the bevel ring 8 mesh with each other, the bevel ring 8 is driven by the bevel gear 9 The ring begins to rotate. Because the conical ring 8 is fixedly connected to the rear side of the rotating ring 7, the rotating ring 7 rotates accordingly. The outer wall of the rotating ring 7 is rotatably connected to the fixed ring 5, ensuring the stability of the rotation. The rotating ring 12 fixed on the inner surface of the rotating ring 7 also rotates together. The connecting ring 16 fixed on the inner surface of the rotating ring 12 also rotates. Multiple spray heads 11 are rotatably connected through the front side of the connecting ring 16. When the connecting ring 16 rotates, the spray heads 11 move in a circular motion around the rotating block 10. At the same time, urea enters the spray head 11 through the urea feeding pipe 2, passes through the rotating block 10, and is sprayed out by rotation. This achieves the all-round and multi-angle dispersion of urea in the flue, so that it can evenly cover the entire cross-section of the flue, ensuring full contact with nitrogen oxides in the flue gas and improving the denitrification reaction efficiency.

[0018] like Figure 5-6As shown, this utility model provides a technical solution: Preferably, the snap-fit ​​structure 3 includes a snap-fit ​​base 31, the inner surface of which is movably connected to the air intake pipe 4. Two positioning posts 13 are fixedly connected to the front side of the snap-fit ​​base 31, and two positioning plates 14 are fixedly connected to the outer wall of the air intake pipe 4. The outer walls of the positioning posts 13 are movably connected to the positioning plates 14. A connecting rod 38 is slidably connected through the front side of the snap-fit ​​base 31. Movable blocks 32 are fixedly connected to both ends of the connecting rod 38. The outer walls of the movable blocks 32 are slidably connected to the snap-fit ​​base 31. A slanted groove 33 is opened through the left side of the movable block 32. A guide post 34 is slidably connected to the inner surface of the slanted groove 33. A snap-fit ​​block 36 is fixedly connected to the outer wall of the guide post 34. Multiple connecting posts 35 are fixedly connected to the inner surface of the snap-fit ​​base 31. The outer walls of the connecting posts 35 are slidably connected to the snap-fit ​​blocks 36. A spring 37 is sleeved on the outer wall of the connecting posts 35. One end of the spring 37 is fixedly connected to the snap-fit ​​base 31, and the other end of the spring 37 is fixedly connected to the snap-fit ​​block 36. The outer wall of the locking block 36 is movably connected to the annular locking groove 15. When installing the air intake pipe 4, first place the air intake pipe 4 into the inner surface of the locking base 31, so that the positioning plate 14 on the outer wall of the air intake pipe 4 is aligned with the positioning post 13 on the front side of the locking base 31, which plays a preliminary positioning role and facilitates subsequent precise connection. Then, pull the connecting rod 38, and the movable blocks 32 fixed at both ends of the connecting rod 38 slide on the locking base 31. The guide post 34 in the inclined groove 33 on the left side of the movable block 32 moves with the movable block 32. The guide post 34 drives the locking block 36 to slide along the connecting post 35, compressing the spring 37. When the locking block 36 moves to the position corresponding to the annular groove 15 on the air intake pipe 4, the connecting rod 38 is released. The elastic force of the spring 37 causes the locking block 36 to engage with the annular groove 15, completing the engagement between the air intake pipe 4 and the mounting base 31, thereby realizing the quick connection and installation of air intake 4 and the tank 1. When disassembling, pull the connecting rod 38 to disengage the locking block 36 from the annular groove 15, and the air intake pipe 4 can be removed.

[0019] The working principle of this low-temperature SCR denitrification device for sintering flue gas will be explained in detail below.

[0020] like Figure 1-6As shown, after the motor 6 starts, its output shaft drives the bevel gear 9 to rotate. Since the bevel gear 9 meshes with the bevel ring 8, the bevel ring 8 starts to rotate under the drive of the bevel gear 9. Because the rotating ring 7 is fixedly connected to the rear side of the bevel ring 8, the rotating ring 7 rotates accordingly. The outer wall of the rotating ring 7 is rotatably connected to the fixed ring 5, ensuring the stability of the rotation. The rotating ring 12 fixed on the inner surface of the rotating ring 7 also rotates together. The connecting ring 16 fixed on the inner surface of the rotating ring 12 also rotates. Multiple spray heads 11 are rotatably connected through the front side of the connecting ring 16. When the connecting ring 16 rotates, the spray heads 11 rotate around the rotating block 10. At the same time, urea enters the spray head 11 through the urea feeding pipe 2, passes through the rotating block 10, and is sprayed out by rotation. This achieves the all-round and multi-angle dispersion of urea in the flue, so that it can evenly cover the entire cross-section of the flue, ensuring full contact with nitrogen oxides in the flue gas and improving the removal efficiency. To improve the efficiency of the nitration reaction, first place the air inlet pipe 4 into the inner surface of the clamping base 31, aligning the positioning plate 14 on the outer wall of the air inlet pipe 4 with the positioning post 13 on the front side of the clamping base 31, which serves as a preliminary positioning function to facilitate subsequent precise connection. Then, pull the connecting rod 38, and the movable blocks 32 fixed at both ends of the connecting rod 38 slide on the clamping base 31. The guide post 34 in the inclined groove 33 on the left side of the movable block 32 moves with the movable block 32. Due to the guiding effect of the inclined groove 33, the guide post 34 drives the clamping block 36 to slide along the connecting post 35, compressing the spring 37. When the clamping block 36 moves to the position corresponding to the annular clamping groove 15 on the air inlet pipe 4, release the connecting rod 38. The elastic force of the spring 37 causes the clamping block 36 to engage with the annular clamping groove 15, completing the engagement of the air inlet pipe 4 with the clamping base 31, thereby realizing the quick connection and installation of air inlet 4 and tank 1. When disassembling, pull the connecting rod 38 to disengage the clamping block 36 from the annular clamping groove 15, and the air inlet pipe 4 can be removed.

[0021] 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 illustrative of the 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 low-temperature SCR denitrification device for sintering flue gas, characterized in that: The tank includes a tank body (1), a urea feeding pipe (2) is fixedly connected to the outer wall of the tank body (1), a snap-fit ​​structure (3) is provided on the front side of the tank body (1), an air inlet pipe (4) is provided in front of the snap-fit ​​structure (3), a fixing ring (5) is fixedly connected to the inner surface of the tank body (1), and a motor (6) is fixedly connected to the outer wall of the tank body (1).

2. The sintering flue gas low-temperature SCR denitrification device according to claim 1, characterized in that: The output shaft of the motor (6) is fixedly connected to a bevel gear (9), and a bevel gear ring (8) is meshed with the outer wall of the bevel gear (9). A swivel ring (7) is fixedly connected to the rear side of the bevel gear ring (8).

3. The sintering flue gas low-temperature SCR denitrification device according to claim 2, characterized in that: The outer wall of the rotating ring (7) is rotatably connected to the fixed ring (5), and a rotating ring (12) is fixedly connected to the inner surface of the rotating ring (7). The outer wall of the rotating ring (12) is rotatably connected to the fixed ring (5), and a connecting ring (16) is fixedly connected to the inner surface of the rotating ring (12).

4. The sintering flue gas low-temperature SCR denitrification device according to claim 3, characterized in that: The front side of the connecting ring (16) is rotatably connected to a plurality of spray heads (11), and the rear end of the spray head (11) is fixedly connected to a rotating block (10). The outer wall of the urea feeding pipe (2) is rotatably connected to the rotating block (10).

5. The low-temperature SCR denitrification device for sintering flue gas according to claim 1, characterized in that: The snap-fit ​​structure (3) includes a snap-fit ​​base (31), the inner surface of which is movably connected to the air intake pipe (4), two positioning posts (13) are fixedly connected to the front side of the snap-fit ​​base (31), and two positioning plates (14) are fixedly connected to the outer wall of the air intake pipe (4). The outer wall of the positioning post (13) is movably connected to the positioning plate (14).

6. The sintering flue gas low-temperature SCR denitrification device according to claim 5, characterized in that: A connecting rod (38) is slidably connected to the front side of the card holder (31). Both ends of the connecting rod (38) are fixedly connected to movable blocks (32). The outer wall of the movable block (32) is slidably connected to the card holder (31). A slanted groove (33) is provided through the left side of the movable block (32). A guide post (34) is slidably connected to the inner surface of the slanted groove (33). A card block (36) is fixedly connected to the outer wall of the guide post (34).

7. A low-temperature SCR denitrification device for sintering flue gas according to claim 6, characterized in that: The inner surface of the card holder (31) is fixedly connected with a plurality of connecting posts (35). The outer wall of the connecting post (35) is slidably connected to the card block (36). The outer wall of the connecting post (35) is fitted with a spring (37). One end of the spring (37) is fixedly connected to the card holder (31), and the other end of the spring (37) is fixedly connected to the card block (36). The outer wall of the card block (36) is movably connected to the annular card groove (15).

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