Accurate denitration system for cement kiln

Abstract

The invention belongs to the field of cement kiln denitration, and particularly relates to a cement kiln accurate denitration system which comprises a denitration tower, a first supporting side plate, a second supporting side plate, a supporting top plate, an injection assembly, a driving assembly, an overturning plate, a spray head, a sealing assembly and a communication assembly. The communicating assembly is installed on the supporting top plate and connected with the communicating assembly, the output end of the communicating assembly is connected with the top of the overturning plate, the injection assembly is installed on the supporting top plate and connected with the communicating assembly, the two sealing assemblies are symmetrically installed on the outer walls of the two second supporting side plates, and the output ends of the sealing assemblies are connected to the end of the overturning plate in a clamped mode. Therefore, when the spray head is replaced, the spray head does not need to enter the denitration tower, the disassembly and replacement operation can be directly completed outside the tower, and the core problems that in the background technology, the spray head is fixedly installed in the denitration tower, shutdown cooling and flue gas emptying are needed during replacement, the spray head needs to enter a narrow tower for operation, the operation difficulty is large, time and labor are consumed, and potential safety hazards exist are solved.

Description

Technical Field

[0001] This invention belongs to the field of cement kiln denitrification, and in particular relates to a precision denitrification system for cement kilns. Background Technology

[0002] Cement kiln production requires a denitrification system to treat nitrogen oxides in flue gas. Existing technologies mostly use atomizing nozzles to spray denitrifying agents to achieve denitrification. The nozzles are generally fixedly installed inside the denitrification tower, and the pump and delivery pipeline deliver the denitrifying agent to the nozzle for atomization. The agent reacts with the high-temperature flue gas inside the tower to remove nitrogen oxides, which can meet the basic denitrification requirements and is widely used in the field of cement kiln denitrification.

[0003] The existing design of installing nozzles inside the denitrification tower has a core flaw: nozzle replacement and maintenance are extremely inconvenient. Because the nozzles are in a high-temperature, high-dust, and highly corrosive environment inside the tower for a long time, they are prone to clogging, wear, and aging. Regular replacement is necessary to ensure the denitrification effect. However, since the nozzles are located inside the tower, replacement requires shutting down the machine to cool down and venting the flue gas. Personnel must enter the narrow tower through the maintenance port to work, which is difficult, time-consuming, labor-intensive, and has low maintenance efficiency. It also poses safety hazards. Denitrification efficiency is often affected by untimely replacement, making it unsuitable for the continuous production and precise denitrification requirements of cement kilns. Summary of the Invention

[0004] The purpose of this invention is to address the core defects of the existing technology mentioned in the background section, where the nozzles are installed inside the denitrification tower. Replacing and maintaining the nozzles is extremely inconvenient because the nozzles are constantly exposed to the high temperature, high dust, and strong corrosive environment inside the tower, making them prone to clogging, wear, and aging. Regular replacement is necessary to ensure the denitrification effect. However, since the nozzles are located inside the tower, replacement requires shutting down the machine for cooling and venting the flue gas. Workers must enter the confined space inside the tower through the maintenance port, making the operation difficult, time-consuming, and labor-intensive, resulting in low maintenance efficiency and safety hazards. Furthermore, untimely replacement often affects denitrification efficiency, failing to meet the needs of continuous production and precise denitrification in cement kilns. Therefore, this invention provides a precise denitrification system for cement kilns.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cement kiln precision denitrification system, comprising a denitrification tower, a first supporting side plate, a second supporting side plate, a supporting top plate, an injection assembly, a drive assembly, a tilting plate, nozzles, a sealing assembly, and a communication assembly. Two first supporting side plates and two second supporting side plates are respectively provided and staggered on the outer wall of the denitrification tower. The supporting top plate is fixedly connected to the top of the first supporting side plates and the second supporting side plates. The drive assembly is mounted on the two first supporting side plates. The tilting plate is rotatably engaged with the top of the denitrification tower. Multiple nozzles are threaded at equal intervals on the bottom of the tilting plate. The communication assembly is mounted on the supporting top plate, and its output end is connected to the top of the tilting plate. The injection assembly is mounted on the supporting top plate and connected to the communication assembly. Two sets of sealing assemblies are provided and symmetrically mounted on the outer walls of the two second supporting side plates, and the output end of the sealing assembly is engaged with the end of the tilting plate.

[0006] Furthermore, the connecting component includes a third driving device, a driving arm, and a connecting pipe. The third driving device is installed on the top of the supporting top plate. The output end of the third driving device passes through the top of the supporting top plate and is fixedly connected to one end of the driving arm. The outer wall of the connecting pipe is fixedly connected to the other end of the driving arm. The connecting pipe has two output ends, which are symmetrically snapped into the top of the flip plate.

[0007] Furthermore, the injection assembly includes a pump body, a connecting hose, and a connector. The pump body is mounted on the top of the supporting top plate, and the connector is symmetrically fixedly connected to the connecting pipe. The connecting hose is provided between the input end of the connector and the pump body, and the two are connected through the connecting hose.

[0008] Furthermore, the driving assembly includes a first support platform, a first driving device, a driving rod, and a support head. The first support platform is fixedly connected to the outer wall of one of the first support side plates. The first driving device is mounted on the top of the first support platform. One end of the driving rod is fixedly connected to the output end of the first driving device, and the other end of the driving rod is rotatably connected to the inner wall of the other first support side plate. The support head is fixedly connected to the middle end of the driving rod, and the bottom of the support head is fixedly connected to the top of the flip plate.

[0009] Furthermore, the sealing assembly includes a second support platform, a second driving device, a fixing head, and a sealing plate. The second support platform is fixedly connected to the outer wall of the second support side plate. The second driving device is installed on the top of the second support platform. The output end of the second driving device passes through the outer wall of the second support side plate and is fixedly connected to the side wall of the fixing head. The sealing plate is slidably engaged with the top of the denitrification tower, and the top of the sealing plate is fixedly connected to the bottom of the fixing head. One end of the sealing plate is in contact with the end of the flip plate.

[0010] Furthermore, the interior of the flip plate has a hollow structure.

[0011] Furthermore, the top of the denitrification tower is provided with a tilting groove, the end of the tilting plate has a gap with the inner wall of the tilting groove, and the width of the sealing plate is greater than the width of the tilting groove.

[0012] Furthermore, the two ends of the flip plate are arc-shaped structures, the end of the sealing plate is provided with a snap-fit ​​groove that matches the end of the flip plate, and the end of the flip plate is covered with a sealing gasket.

[0013] Compared with existing technologies, the advantages of this cement kiln precision denitrification system are: 1. This invention uses a drive component in conjunction with a rotatable rotating plate. The drive component can flexibly rotate the rotating plate at the top of the denitrification tower, allowing the nozzles at the bottom of the rotating plate to freely switch between downward operation and upward exposure. When changing nozzles, workers do not need to enter the denitrification tower; they can complete the disassembly and replacement operation directly outside the tower. This solves the core problems of the prior art, where nozzles are fixedly installed inside the denitrification tower, requiring shutdown for cooling and venting of flue gas during replacement, and requiring entry into the confined tower for operation, which is difficult, time-consuming, labor-intensive, and poses safety hazards.

[0014] 2. This invention utilizes the coordinated operation of the connecting component and the injection component. The third driving device of the connecting component can drive the connecting pipe to move up and down, adapting to the flipping action of the flipping plate to achieve flexible connection and disconnection. The injection component uses a connecting hose to supply material, which can be flexibly adjusted as the connecting pipe moves. This eliminates the need to disassemble the delivery pipeline during nozzle replacement, and the denitrifying agent can be quickly restored to a stable supply after the flipping plate is reset. This solves the problems in the background technology where nozzle maintenance requires disassembling the delivery pipeline, which is cumbersome and prone to denitrifying agent leakage, and it is difficult to quickly restore the supply after maintenance, affecting the continuity of denitrification operations.

[0015] 3. This invention, through the adaptive design of the sealing component with the tilting plate and the tilting groove of the denitrification tower, allows the sealing component to flexibly engage or disengage the sealing plate with the end of the tilting plate. Combined with the sealing gasket at the end of the tilting plate, the matching locking groove of the sealing plate, and the structure where the width of the sealing plate is greater than the width of the tilting groove, reliable sealing of the top of the denitrification tower is achieved during denitrification operations, preventing flue gas leakage. Furthermore, the seal can be quickly released without obstructing the movement of the tilting plate when the nozzle is replaced. This solves the problem in the prior art where nozzle maintenance requires damage to the tower's sealing structure, which easily leads to flue gas leakage, and the sealing structure hinders maintenance operations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a precision denitrification system for cement kilns provided by the present invention; Figure 2 This is a schematic diagram of the structure of a drive component for a precision denitrification system in a cement kiln provided by the present invention; Figure 3 This is a schematic diagram of the structure of an injection component of a precision denitrification system for cement kilns provided by the present invention; Figure 4 This is a schematic diagram of the structure of a sealing component for a precision denitrification system in a cement kiln provided by the present invention; Figure 5 This is a schematic diagram of the structure of a tilting plate in a precision denitrification system for cement kilns provided by the present invention; Figure 6 This invention provides a precision denitrification system for cement kilns. Figure 3 A magnified structural diagram of part A in the middle.

[0017] As shown in the figure: 1. Denitrification tower; 2. First supporting side plate; 3. Second supporting side plate; 4. Supporting top plate; 5. Injection assembly; 51. Pump body; 52. Connecting hose; 53. Connector; 6. Drive assembly; 61. First support platform; 62. First drive device; 63. Drive rod; 64. Support head; 7. Tilting plate; 8. Spray nozzle; 9. Sealing assembly; 91. Second support platform; 92. Second drive device; 93. Fixing head; 94. Sealing plate; 10. Connecting component; 101. Third drive device; 102. Drive arm; 103. Connecting pipe. Detailed Implementation

[0018] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] like Figures 1-6As shown, this application proposes a precision denitrification system for cement kilns, including a denitrification tower 1, a first supporting side plate 2, a second supporting side plate 3, a supporting top plate 4, an injection assembly 5, a drive assembly 6, a tilting plate 7, nozzles 8, a sealing assembly 9, and a connecting assembly 10. Two first supporting side plates 2 and two second supporting side plates 3 are respectively provided and staggered on the outer wall of the denitrification tower 1. The supporting top plate 4 is fixedly connected to the top of the first supporting side plates 2 and the second supporting side plates 3. The drive assembly 6 is installed on the two first supporting side plates 2. The tilting plate 7 is rotatably engaged with the top of the denitrification tower 1. Multiple nozzles 8 are threaded at equal intervals on the bottom of the tilting plate 7. The connecting assembly 10 is installed on the supporting top plate 4, and the output end of the connecting assembly 10 is connected to the top of the tilting plate 7. The injection assembly 5 is installed on the supporting top plate 4 and connected to the connecting assembly 10. Two sets of sealing assemblies 9 are provided and symmetrically installed on the outer walls of the two second supporting side plates 3, and the output end of the sealing assembly 9 is engaged with the end of the tilting plate 7.

[0020] It should be noted that the staggered design of the first support side plate 2 and the second support side plate 3 described in this embodiment can ensure the stability of the support while providing independent installation space for the drive component 6 and the sealing component 9, avoiding mutual interference when the components are in operation. The flip plate 7 is installed on the top of the denitrification tower 1 by a rotating snap-fit ​​method. With the threaded installation structure of the nozzle 8, it not only ensures the installation firmness of the nozzle 8 during denitrification operation, but also provides a basis for the quick disassembly of the nozzle 8. All components are integrated and installed on the support top plate 4 and side plates. The overall structure is compact and does not require major modifications to the interior of the denitrification tower 1. It is suitable for the upgrade and transformation needs of the existing cement kiln denitrification tower 1, effectively improving the practicality and adaptability of the system.

[0021] Specifically, when this system is working, the output end of the sealing component 9 is engaged with the end of the tilting plate 7 to seal the top of the denitrification tower 1. The injection component 5 delivers the denitrification agent to the tilting plate 7 through the connecting component 10, and then sprays it into the denitrification tower 1 through the nozzle 8 to complete the denitrification. When the nozzle 8 needs to be replaced, the sealing component 9 is released from the tilting plate 7, and the driving component 6 drives the tilting plate 7 to rotate, so that the nozzle 8, which was originally facing downwards, is exposed upwards. The staff can directly disassemble and replace the nozzle 8 without entering the denitrification tower 1, which completely solves the core problem of the nozzle 8 being installed inside the tower and inconvenient for maintenance and replacement in the background technology.

[0022] like Figures 1-6As shown, the connecting component 10 includes a third driving device 101, a driving arm 102, and a connecting pipe 103. The third driving device 101 is installed on the top of the supporting top plate 4. The output end of the third driving device 101 passes through the top of the supporting top plate 4 and is fixedly connected to one end of the driving arm 102. The outer wall of the connecting pipe 103 is fixedly connected to the other end of the driving arm 102. The connecting pipe 103 is provided with two output ends and is symmetrically snapped into the top of the flip plate 7.

[0023] It should be noted that the connecting component 10 described in this embodiment connects the third driving device 101 and the connecting pipe 103 through the driving arm 102, which can stably transmit the driving power to the connecting pipe 103, ensuring smooth up and down movement of the pipe. The connecting pipe 103 is provided with two symmetrical output ends, which can make the denitrification agent evenly delivered to both ends of the tilting plate 7, avoiding uneven distribution of denitrification agent in the tilting plate 7, which would cause the nozzle 8 to spray unbalancedly, and improving the contact efficiency between the denitrification agent and the flue gas. At the same time, this structural design allows the connecting pipe 103 to flexibly adapt to the movement state of the tilting plate 7, and will not cause structural interference due to the rotation of the tilting plate 7, further ensuring the coordination of the overall system movement. The third driving device 101 is a cylinder.

[0024] Specifically, when the connecting component 10 is working, the third driving device 101 drives the driving arm 102 to move, which in turn drives the connecting pipe 103 to move up and down. When the nozzle 8 needs to be replaced, the connecting pipe 103 moves upward and disengages from the top of the flip plate 7, providing sufficient space for the rotation of the flip plate 7 and preventing the pipe from getting stuck with the flip plate 7. When the nozzle 8 is replaced and the flip plate 7 is reset, the connecting pipe 103 moves downward and its output end engages with the top of the flip plate 7 to achieve connection, ensuring smooth delivery of the denitrification agent. This design solves the problem in the background technology that pipe interference during nozzle 8 maintenance causes inconvenience in flipping and makes it difficult to quickly restore the material supply after maintenance.

[0025] like Figures 1-6 As shown, the injection assembly 5 includes a pump body 51, a connecting hose 52, and a connector 53. The pump body 51 is mounted on the top of the supporting top plate 4, and the connector 53 is symmetrically fixedly connected to the connecting pipe 103. The input end of the connector 53 is provided with a connecting hose 52 between it and the pump body 51, and they are connected through the connecting hose 52.

[0026] It should be noted that the injection component 5 described in this embodiment uses a connecting hose 52 to connect the pump body 51 and the connector 53, which can adapt to the up and down movement requirements of the connecting pipe 103 and will not be pulled or broken due to the movement of the pipe. At the same time, the connecting hose 52 has good sealing and corrosion resistance, which can effectively prevent the denitrification agent from leaking and the medium from corroding. The connector 53 is symmetrically fixed on the connecting pipe 103 and is compatible with the dual output end of the pipe, which can realize the diversion and delivery of the denitrification agent and ensure uniform feeding. The pump body 51 is installed on the top of the supporting top plate 4, which is convenient for later inspection and maintenance. The overall structural design takes into account both feeding stability and operation convenience.

[0027] Specifically, when the injection component 5 is working, the pump body 51 delivers the denitrification agent to the connecting hose 52, which then enters the connecting pipe 103 through the connector 53, and finally delivers it to the nozzle 8 through the flip plate 7. The flexible design of the connecting hose 52 allows it to be flexibly adjusted as the connecting pipe 103 moves up and down, without restricting the movement of the pipe or affecting the stable delivery of the denitrification agent. During the replacement of the nozzle 8, the connecting hose 52 can move upward with the connecting pipe 103 without disassembling the pipeline. After the nozzle 8 is replaced, the supply can be quickly restored, solving the problems in the background technology where the delivery pipeline needs to be disassembled for the maintenance of the nozzle 8, which is cumbersome and prone to denitrification agent leakage.

[0028] like Figures 1-6 As shown, the drive assembly 6 includes a first support platform 61, a first drive device 62, a drive rod 63, and a support head 64. The first support platform 61 is fixedly connected to the outer wall of one of the first support side plates 2. The first drive device 62 is installed on the top of the first support platform 61. One end of the drive rod 63 is fixedly connected to the output end of the first drive device 62, and the other end of the drive rod 63 is rotatably connected to the inner wall of the other first support side plate 2. The support head 64 is fixedly connected to the middle end of the drive rod 63, and the bottom of the support head 64 is fixedly connected to the top of the flip plate 7.

[0029] It should be noted that the drive assembly 6 described in this embodiment adopts a single-sided drive and double-sided support structure design. The first support platform 61 provides a stable installation base for the first drive device 62. The two ends of the drive rod 63 are respectively connected to the first drive device 62 and the first support side plate 2, which can ensure the stability of power transmission and avoid shaking during the drive process. The support head 64 is set at the middle of the drive rod 63 and is fixedly connected to the flip plate 7, which can make the flip plate 7 evenly stressed, ensure smooth flipping action, and prevent tilting or jamming. At the same time, it can accurately control the rotation angle of the flip plate 7, ensure the installation accuracy of the nozzle 8 after reset, and improve the reliability of the system operation. The first drive device 62 is a drive motor.

[0030] Specifically, when the drive assembly 6 is working, the first drive device 62 drives the drive rod 63 to rotate. The drive rod 63 drives the tilting plate 7 to rotate around the top of the denitrification tower 1 through the support head 64. When it is necessary to replace the nozzle 8, the drive rod 63 drives the tilting plate 7 to tilt, so that the nozzle 8 originally installed at the bottom of the tilting plate 7 is exposed upwards. The staff can operate the nozzle 8 directly outside the tower. After the nozzle 8 is replaced, the drive rod 63 rotates in the opposite direction, driving the tilting plate 7 to return to the working position. This design allows the nozzle 8 to be quickly accessed from outside the tower without the need for staff to enter the denitrification tower 1, completely solving the problem in the background technology that the maintenance of the nozzle 8 requires entering the narrow tower, which is difficult to operate and poses safety hazards.

[0031] like Figures 1-6 As shown, the sealing assembly 9 includes a second support platform 91, a second drive device 92, a fixing head 93, and a sealing plate 94. The second support platform 91 is fixedly connected to the outer wall of the second support side plate 3. The second drive device 92 is installed on the top of the second support platform 91. The output end of the second drive device 92 passes through the outer wall of the second support side plate 3 and is fixedly connected to the side wall of the fixing head 93. The sealing plate 94 is slidably engaged with the top of the denitrification tower 1, and the top of the sealing plate 94 is fixedly connected to the bottom of the fixing head 93. One end of the sealing plate 94 is in contact with the end of the flip plate 7.

[0032] It should be noted that the sealing assembly 9 described in this embodiment adopts two symmetrically arranged structures, which can achieve synchronous sealing from both ends of the flip plate 7, improving the uniformity and reliability of the seal. The sealing plate 94 is slidably engaged with the top of the denitrification tower 1 and can slide smoothly under the drive of the second drive device 92, ensuring tight contact with the end of the flip plate 7. The fixing head 93 connects the second drive device 92 and the sealing plate 94, which can smoothly transmit the driving force to the plate and prevent the plate from deviating when sliding. At the same time, the second support platform 91 provides a stable support for the second drive device 92, ensuring the stability of the operation of the sealing assembly 9 and effectively preventing the leakage of flue gas in the denitrification tower 1. The second drive device 92 is a cylinder.

[0033] Specifically, when the sealing assembly 9 is in operation, in the denitrification operation state, the second drive device 92 drives the sealing plate 94 to slide, so that the sealing plate 94 abuts against the end of the tilting plate 7, thereby sealing the top of the denitrification tower 1 and preventing flue gas leakage. When it is necessary to replace the nozzle 8, the second drive device 92 drives the sealing plate 94 to slide in the opposite direction, disengaging from the end of the tilting plate 7, releasing the limit on the tilting plate 7, and facilitating the smooth rotation of the tilting plate 7. After the nozzle 8 is replaced and the tilting plate 7 is reset, the sealing plate 94 slides back to the abutting position to re-seal. This design not only ensures the sealing performance of the denitrification operation, but also does not affect the maintenance and replacement of the nozzle 8, solving the problem in the background technology that the maintenance of the nozzle 8 requires damage to the sealing structure and is prone to flue gas leakage.

[0034] like Figures 1-6 As shown, the interior of the flip plate 7 is a hollow structure.

[0035] It should be noted that the tilting plate 7 described in this embodiment adopts a cavity structure design, which can serve as a temporary storage and delivery channel for the denitrification agent. After the denitrification agent enters the cavity from the connecting pipe 103 of the connecting component 10, it can be evenly distributed to each nozzle 8 at the bottom, avoiding insufficient or excessive supply to a single nozzle 8, and improving the uniformity of denitrification agent spraying. At the same time, the cavity structure can reduce the overall weight of the tilting plate 7, reduce the power load of the drive component 6, make the tilting plate 7 rotate more smoothly, reduce energy consumption, and the inner wall of the cavity can be treated with anti-corrosion to prevent the denitrification agent from corroding the tilting plate 7 and extend the service life of the components.

[0036] like Figures 1-6 As shown, the top of the denitrification tower 1 is provided with a tilting groove, the end of the tilting plate 7 is in a gap with the inner wall of the tilting groove, and the width of the sealing plate 94 is greater than the width of the tilting groove.

[0037] It should be noted that the top tilting groove of the denitrification tower 1 described in this embodiment provides a dedicated rotation space for the tilting plate 7, which can limit the rotation trajectory of the tilting plate 7 and prevent deviation during tilting. The gap design between the end of the tilting plate 7 and the inner wall of the tilting groove can reduce the friction between the tilting plate 7 and the groove wall during rotation, reduce component wear, and ensure smooth tilting action. The width of the sealing plate 94 is greater than the width of the tilting groove, which can completely cover the tilting groove and the gap between the tilting plate 7 and the groove wall, ensuring no dead corners during sealing, effectively preventing flue gas from leaking from the gap, and taking into account both the flexibility of tilting and the reliability of sealing.

[0038] like Figures 1-6 As shown, the two ends of the flip plate 7 are arc-shaped structures, and the end of the sealing plate 94 is provided with a snap-fit ​​groove that matches the end of the flip plate 7. The end of the flip plate 7 is covered with a sealing gasket.

[0039] It should be noted that the arc-shaped structure at both ends of the flip plate 7 described in this embodiment can reduce the frictional resistance between the flip plate 7 and the sealing plate 94 and the flip groove during flipping, avoid jamming, reduce component wear, and extend service life. The snap-fit ​​groove of the sealing plate 94 matches the end of the flip plate 7, which can make the two fit more tightly and improve the sealing effect. The sealing gasket at the end of the flip plate 7 has good high temperature resistance and corrosion resistance, which can further enhance the sealing performance, prevent flue gas from eroding the sealing surface, and ensure the long-term reliability of the sealing structure.

[0040] In summary, the working principle of this cement kiln precision denitrification system is as follows: the second drive device 92 of the sealing component 9 drives the sealing plate 94 to slide, causing the sealing plate 94 to abut against the end of the tilting plate 7. This, combined with the sealing gasket at the end of the tilting plate 7 and the matching locking groove on the sealing plate 94, achieves a seal at the top of the denitrification tower 1. Simultaneously, the third drive device 101 of the connecting component 10 drives the drive arm 102 to move the connecting pipe 103 downwards. The output end of the connecting pipe 103 engages with the top of the tilting plate 7. The pump 51 of the injection component 5 is activated, delivering the denitrification agent through the connecting hose 52 and connector 53 to the connecting pipe 103, which then enters the hollow cavity structure inside. The rotating plate 7, through nozzles 8 evenly spaced at the bottom, sprays material evenly into the denitrification tower 1 to achieve precise denitrification. During the denitrification process, all components work together to ensure stable material supply and tower sealing. When nozzles 8 need to be replaced, the feeding of the injection component 5 is stopped first. The second drive device 92 of the sealing component 9 drives the sealing plate 94 to slide in the opposite direction, disengaging it from the end of the rotating plate 7 and releasing the restriction on the rotating plate 7. Then, the third drive device 101 of the connecting component 10 drives the drive arm 102 to move the connecting pipe 103 upward, disengaging it from the top of the rotating plate 7 to avoid interfering with the rotating action. Then, the first drive device 62 of the drive component 6 drives the drive rod 63 to rotate. The drive rod 63 drives the tilting plate 7 to rotate in the tilting groove at the top of the denitrification tower 1 via the support head 64. The arc-shaped structure at both ends of the tilting plate 7 ensures smooth rotation, and the gap between its end and the inner wall of the tilting groove prevents jamming, so that the bottom nozzle 8 of the tilting plate 7 is exposed upwards. The staff can directly disassemble and replace the threaded nozzle 8 outside the tower without entering the denitrification tower 1. After the nozzle 8 is replaced, the drive assembly 6 drives the tilting plate 7 to return to the working position with the nozzle 8 facing downwards. The third drive device 101 of the connecting assembly 10 drives the connecting pipe 103 to move downwards, and the output end reconnects with the top of the tilting plate 7. Finally, the sealing assembly 9 drives... The sealing plate 94 is reset and contacts the end of the flip plate 7 for sealing. The width of the sealing plate 94 is greater than the width of the flip groove, which can fully cover the flip groove and gap, ensuring a seal without dead corners and restoring the denitrification operation. The system achieves the replacement of the nozzle 8 exposed outside the tower by means of the flip plate 7 flip design, the connecting component 10 moving up and down, and the sealing component 9 opening and closing flexibly. This completely solves the core problem in the background technology that the nozzle 8 is fixedly installed inside the denitrification tower 1, and the replacement requires shutdown for cooling and exhaust of flue gas. The personnel need to enter the narrow tower to work, which is difficult to operate, time-consuming and labor-intensive, has low operation and maintenance efficiency and poses safety hazards. It is also easy to affect the denitrification efficiency due to untimely replacement.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision denitrification system for cement kilns, characterized in that, The components include a denitrification tower (1), a first supporting side plate (2), a second supporting side plate (3), a supporting top plate (4), an injection assembly (5), a drive assembly (6), a tilting plate (7), a nozzle (8), a sealing assembly (9), and a connecting assembly (10), wherein, Two of the first support side plate (2) and two of the second support side plate (3) are provided and are staggered on the outer wall of the denitrification tower (1). The support top plate (4) is fixedly connected to the top of the first support side plate (2) and the second support side plate (3). The drive assembly (6) is mounted on the two first support side plates (2), the tilting plate (7) is rotatably snapped onto the top of the denitrification tower (1), and a plurality of nozzles (8) are threaded at equal intervals onto the bottom of the tilting plate (7); The connecting component (10) is mounted on the supporting top plate (4), and the output end of the connecting component (10) is connected to the top of the flip plate (7). The injection component (5) is mounted on the supporting top plate (4), and the injection component (5) is connected to the connecting component (10). The sealing assembly (9) is provided in two sets and is symmetrically installed on the outer walls of the two second support side plates (3), and the output end of the sealing assembly (9) is snapped into the end of the flip plate (7).

2. The cement kiln precision denitrification system according to claim 1, characterized in that, The connecting component (10) includes a third driving device (101), a driving arm (102), and a connecting pipe (103), wherein, The third drive device (101) is installed on the top of the support plate (4). The output end of the third drive device (101) passes through the top of the support plate (4) and is fixedly connected to one end of the drive arm (102). The outer wall of the connecting pipe (103) is fixedly connected to the other end of the drive arm (102). The connecting pipe (103) has two output ends and is symmetrically snapped onto the top of the flip plate (7).

3. The cement kiln precision denitrification system according to claim 2, characterized in that, The injection assembly (5) includes a pump body (51), a connecting hose (52), and a connector (53), wherein, The pump body (51) is installed on the top of the supporting top plate (4), and the connector (53) is symmetrically fixedly connected to the connecting pipe (103). The input end of the connector (53) is provided with the connecting hose (52) between it and the pump body (51), and they are connected through the connecting hose (52).

4. The cement kiln precision denitrification system according to claim 3, characterized in that, The drive assembly (6) includes a first support platform (61), a first drive device (62), a drive rod (63), and a support head (64), wherein, The first support platform (61) is fixedly connected to the outer wall of one of the first support side plates (2), the first drive device (62) is installed on the top of the first support platform (61), one end of the drive rod (63) is fixedly connected to the output end of the first drive device (62), the other end of the drive rod (63) is rotatably connected to the inner wall of the other first support side plate (2), the support head (64) is fixedly connected to the middle end of the drive rod (63), and the bottom of the support head (64) is fixedly connected to the top of the flip plate (7).

5. The cement kiln precision denitrification system according to claim 4, characterized in that, The sealing assembly (9) includes a second support platform (91), a second driving device (92), a fixing head (93), and a sealing plate (94), wherein, The second support platform (91) is fixedly connected to the outer wall of the second support side plate (3). The second drive device (92) is installed on the top of the second support platform (91). The output end of the second drive device (92) passes through the outer wall of the second support side plate (3) and is fixedly connected to the side wall of the fixed head (93). The sealing plate (94) is slidably engaged with the top of the denitrification tower (1). The top of the sealing plate (94) is fixedly connected to the bottom of the fixed head (93). One end of the sealing plate (94) is in contact with the end of the flip plate (7).

6. The cement kiln precision denitrification system according to claim 1, characterized in that, The interior of the flip plate (7) is a hollow structure.

7. The cement kiln precision denitrification system according to claim 5, characterized in that, The top of the denitrification tower (1) is provided with a tilting groove, the end of the tilting plate (7) has a gap with the inner wall of the tilting groove, and the width of the sealing plate (94) is greater than the width of the tilting groove.

8. The cement kiln precision denitrification system according to claim 5, characterized in that, The two ends of the flip plate (7) are arc-shaped structures, and the end of the sealing plate (94) is provided with a snap-fit ​​groove that matches the end of the flip plate (7). The end of the flip plate (7) is covered with a sealing gasket.

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