Combined soot blowing and SCR denitration method and device

Abstract

The application discloses a combined soot-blowing SCR denitration method and device, relates to the technical field of denitration equipment, and comprises a tower body, air inlet pipes and exhaust pipes are arranged on the upper and lower sides of the tower body, a conical barrel is fixedly installed in the tower body, and a spraying assembly is arranged on the conical barrel. The combined soot-blowing SCR denitration method and device directly drive the rotation of the fan blade and subsequent components through the flue gas flow rate, realize self-adaptive adjustment of the flue gas flow, when the flue gas flow increases, the rotating speed of the related components is also increased accordingly, so that the flue gas is more effectively treated, and the automatic adjustment mechanism not only improves the treatment efficiency, but also reduces unnecessary energy consumption; the gas-liquid mixed self-priming pump can intermittently extract the liquid absorbent in the liquid storage area and spray out through the spraying head, and the intermittent spraying mode helps to ensure the sufficient mixing between the liquid absorbent and the flue gas, thereby improving the absorption efficiency.

Description

Technical Field

[0001] This invention relates to the field of denitrification equipment technology, specifically to a combined soot blowing SCR denitrification method and apparatus. Background Technology

[0002] In the current field of environmental protection technology, SCR (Selective Catalytic Reduction) denitrification devices with combined soot blowing are widely used in flue gas purification to reduce nitrogen oxide (NOx) emissions generated in industrial processes such as coal and oil combustion. SCR denitrification devices inject reducing agents such as ammonia (NH3) or urea into the flue gas, and under the action of the catalyst, convert NOx into nitrogen (N2) and water (H2O), thereby achieving the purpose of denitrification. Combined soot blowing technology is used to keep the catalyst surface clean and prevent the catalytic efficiency from decreasing due to ash accumulation, coking, etc.

[0003] Existing combined soot blowing SCR denitrification devices typically rely on fixed flue gas flow treatment systems and traditional gas-liquid mixing pumps. These systems often lack adaptive adjustment capabilities when processing flue gas flow, making it difficult to maintain optimal treatment efficiency when flue gas flow fluctuates, and resulting in high energy consumption. Specifically, traditional flue gas flow treatment systems usually do not have the function of adjusting treatment capacity in real time according to flue gas flow. This means that when the flue gas flow increases, the system may not be able to respond in time, resulting in insufficient flue gas treatment; while when the flue gas flow decreases, it may lead to over-treatment, wasting energy.

[0004] In addition, existing gas-liquid mixing pumps typically use a continuous spraying method. While this method can ensure that the liquid absorbent has a certain contact with the flue gas, it is often difficult to guarantee sufficient mixing and uniform distribution, thus affecting the absorption efficiency. At the same time, continuous spraying may also lead to waste of liquid absorbent and excessive wear of the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a combined soot blowing SCR denitrification method and apparatus, which solves the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a combined soot blowing SCR denitrification device, comprising a tower body, an air inlet pipe and an exhaust pipe respectively provided on the upper and lower sides of the tower body, a conical barrel fixedly installed inside the tower body, and a spray assembly provided on the conical barrel;

[0007] The spray assembly includes a rotating frame rotatably mounted on a conical barrel, a conveying pipe on the rotating frame, fan blades on the outer wall of the conveying pipe, a diversion pipe mounted on the rotating frame on the conveying pipe, several spray heads at the bottom of the diversion pipe, a gas-liquid mixing self-priming pump at the bottom of the conveying pipe, an inclined pipe at the bottom of the gas-liquid mixing self-priming pump, and a liquid suction component at the bottom of the inclined pipe.

[0008] As a further preferred embodiment of this technical solution, the liquid suction component includes an elastic telescopic tube connected to the bottom of the inclined tube, a connecting cylinder connected to the bottom of the elastic telescopic tube, a pressure plate fixedly connected to the top of the connecting cylinder, slide rods fixedly connected to the top of the connecting cylinder and slidably mounted on the inclined tube, a damping spring sleeved on the slide rod between the pressure plate and the inclined tube, and a guide rod fixedly connected to the inner end of the pressure plate.

[0009] As a further preferred embodiment of this technical solution, the liquid suction component also includes a box fixedly installed inside the tower body, and the inclined tube is rotatably installed on the box body via a rotating disk. A support column is fixedly connected inside the box body, and a rotating rod is fixedly connected to the top of the support column. The top of the rotating rod is fixedly connected to the outer wall of the inclined tube, and a dividing disk fixedly installed on the top of the support column is rotatably connected to the outer wall of the rotating rod. The dividing disk is fixedly installed in the inner cavity of the box body, and the dividing disk divides the inner cavity of the box body into two parts: the lower part is the liquid storage area, and the upper part is the working area.

[0010] As a further preferred embodiment of this technical solution, a circular groove is provided on the surface of the dividing disc, and a sliding plate is slidably connected in the circular groove. A sleeve adapted to the connecting cylinder is provided on the sliding plate, and a liquid extraction pipe is fixedly connected to the bottom of the sleeve, extending to the bottom of the liquid storage area.

[0011] As a further preferred embodiment of this technical solution, a fixed cylinder is fixedly connected to the bottom of the dividing plate, and an arc-shaped plate is fixedly connected to the top of the fixed cylinder, with the positions of the fixed cylinder, the arc-shaped plate, and the guide rod corresponding to each other.

[0012] As a further preferred embodiment of this technical solution, a fixed plate is connected to the top of the conical barrel, and exhaust holes are arranged in a circular array on the surface of the rotating plate. A filter cylinder is rotatably connected to the exhaust holes, and a fifth gear is fixedly connected to the top of the filter cylinder. A top plate is fixedly installed on the top of the conveying pipe at the bottom of the inner cavity of the tower, and an internal gear ring is fixedly connected to the bottom of the top plate.

[0013] As a further preferred embodiment of this technical solution, a support frame is fixedly mounted on a fixed plate on one side of the filter cartridge. A drive rod is rotatably connected to the support frame. From top to bottom, the drive rod is provided with a first gear, a second gear, a third gear, and a seventh gear. One side of the first gear is meshed with an internal gear ring. One side of the second gear is meshed with a fourth gear rotatably mounted on the support frame, and the other side of the fourth gear is meshed with a fifth gear. One side of the third gear is meshed with an external gear ring rotatably mounted on the support frame. The external gear ring and the filter cartridge are on the same axis of rotation. A cleaning frame is fixedly mounted on the inner end of the external gear ring and slidably mounted on the support frame. The inner end of the cleaning frame is provided with bristles for cleaning the outer wall of the filter cartridge.

[0014] As a further preferred embodiment of this technical solution, a positioning shaft is rotatably connected to the support frame, and a sixth gear and a disc are rotatably connected to the positioning shaft. One side of the sixth gear is meshed with a seventh gear. A transmission rod is rotatably connected to the disc off-center. The other end of the transmission rod is rotatably connected to a striking rod for striking the filter cylinder, and the striking rod is slidably mounted on the support frame through a fixed frame.

[0015] This invention also discloses a denitrification method for a combined soot blowing SCR denitrification device, specifically including the following steps:

[0016] Step 1: When the flue gas is conveyed upward from the bottom of the tower, the flue gas drives the fan blades to rotate, which in turn drives the conveying pipe, the diversion pipe, the rotating frame, the gas-liquid mixing self-priming pump, the inclined pipe, the elastic telescopic pipe, the pressure plate, the guide rod, the connecting cylinder, the sleeve, the sliding plate, and the liquid extraction pipe to rotate synchronously.

[0017] Step 2: When the connecting cylinder and the sleeve are connected, the gas-liquid mixing self-priming pump is turned on. The gas-liquid mixing self-priming pump draws the liquid absorbent from the storage area through the inclined pipe, elastic telescopic pipe, connecting cylinder, sleeve and liquid extraction pipe. Then the gas-liquid mixing self-priming pump delivers the liquid absorbent to the spray head through the delivery pipe and the diversion pipe. The liquid absorbent is sprayed out by the spray head, so that the liquid absorbent is mixed with the flue gas. The treated flue gas is filtered through the filter cylinder and finally discharged through the air inlet pipe.

[0018] Step 3: When the conveying pipe rotates, it eventually drives the filter cylinder to rotate, as well as the cleaning frame and brush to rotate. The cleaning frame, brush, and filter cylinder rotate in opposite directions, so that the brush cleans the filter cylinder that is rotating in the opposite direction. It also drives the striking rod to move back and forth on the fixed frame, thereby causing the striking rod to knock and vibrate to clean the outer wall of the filter cylinder.

[0019] Compared with existing technologies, it has the following advantages:

[0020] The rotation of the fan blades and subsequent components is directly driven by the flue gas velocity, achieving adaptive adjustment of the flue gas flow rate. When the flue gas flow rate increases, the rotation speed of the relevant components also increases accordingly, thus treating the flue gas more effectively. This automatic adjustment mechanism not only improves treatment efficiency but also reduces unnecessary energy consumption. The gas-liquid mixing self-priming pump can intermittently extract the liquid absorbent from the storage area and spray it out through the spray head. This intermittent spraying method helps ensure sufficient mixing between the liquid absorbent and the flue gas, thereby improving absorption efficiency. Since the spray head is connected to components such as the rotating conveying pipe, the uniformity and coverage of the spray can be ensured, further enhancing the treatment effect. This design allows the liquid absorbent to be more evenly distributed in the flue gas, improving purification efficiency. Through the elastic force of the damping spring, a tight seal connection can be maintained between the connecting cylinder and the sleeve. This design not only prevents leakage of the liquid absorbent but also ensures the stable operation of the system, which is crucial for long-term operation and maintenance. As the guide rod moves, the connecting cylinder can automatically switch to different sleeves, realizing intermittent extraction operations. This design enhances the flexibility and reliability of the system, enabling it to adapt to different operating conditions and requirements.

[0021] The rotation of the conveying pipe synchronously drives the rotation of the top plate, internal gear ring, and subsequent gear chains. This design achieves high efficiency in power transmission, reduces energy loss, and improves the overall operating efficiency of the system. The counter-rotation design of the brush bristles and filter cartridge ensures the cleanliness of the filter cartridge surface. This design effectively removes particles and impurities adhering to the filter cartridge surface, effectively preventing clogging and extending the service life of the filter cartridge. The linkage design of the disc, transmission rod, and striking rod ensures that the striking action can continuously and evenly vibrate and clean the filter cartridge. This design avoids the occurrence of cleaning dead corners, making the filter cartridge cleaner more thorough. The automated design of brush cleaning and vibration cleaning greatly reduces the cost of manual maintenance. The system can automatically clean and vibrate the filter cartridge without manual intervention, improving the overall operating efficiency and reliability of the system. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the rotating frame, conveying pipe, diversion pipe, and fan blades in this invention;

[0024] Figure 3 This is a schematic diagram of the structure of the conical barrel, the fixed plate, and the filter cylinder in this invention;

[0025] Figure 4 This is a schematic diagram of the structure of the housing, rotating disk, inclined pipe, and gas-liquid mixing self-priming pump in this invention;

[0026] Figure 5 This is a schematic diagram of the structure of the box, dividing plate, sliding plate, sleeve, and liquid extraction tube in this invention;

[0027] Figure 6 This is a schematic diagram of the structure of the inclined tube, elastic telescopic tube, pressure plate, connecting cylinder, sleeve, and liquid extraction tube in this invention;

[0028] Figure 7 This is a schematic diagram of the structure of the pressure plate, guide rod, fixing cylinder, and arc plate in this invention;

[0029] Figure 8 This is a schematic diagram of the structure of the filter cylinder, support frame, cleaning frame, and brush bristles in this invention;

[0030] Figure 9 This is a schematic diagram of the structure of the disc, transmission rod, and fixed frame in this invention.

[0031] In the diagram: 1. Tower body; 2. Inlet pipe; 3. Exhaust pipe; 4. Conical barrel; 5. Spray assembly; 51. Rotating frame; 52. Conveying pipe; 53. Diverter pipe; 54. Spray head; 55. Fan blade; 56. Box body; 57. Rotating disc; 58. Inclined pipe; 59. Gas-liquid mixing self-priming pump; 510. Slide rod; 511. Pressure plate; 512. Damping spring; 513. Elastic telescopic tube; 514. Connecting cylinder; 515. Guide rod; 516. Support column; 517. Rotating rod; 518. Dividing disc; 519. Circular groove; 520. Slide disc; 521. Sleeve; 522. Liquid pumping unit. 523. Pipe; 524. Fixed cylinder; 525. Arc plate; 526. Top plate; 527. Internal gear ring; 528. Fixed disc; 529. Exhaust port; 520. Filter cylinder; 531. Support frame; 532. Drive rod; 533. First gear; 534. Second gear; 535. Third gear; 536. Fourth gear; 537. Fifth gear; 538. External gear ring; 539. Cleaning frame; 540. Brush bristles; 541. Positioning shaft; 542. Disc; 543. Transmission rod; 544. Striking rod; 545. Fixed frame; 546. Sixth gear; 547. Seventh gear. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Combining Figures 1-9As shown, the present invention provides a technical solution: a combined soot blowing SCR denitrification device, including a tower body 1, with an air inlet pipe 2 and an exhaust pipe 3 respectively arranged on the upper and lower sides of the tower body 1. Inside the tower body 1, a conical barrel 4 is fixedly installed, and a spray assembly 5 is provided at the upper end of the conical barrel 4. The spray assembly 5 is used to spray liquid absorbent inside the tower body 1.

[0034] The spray assembly 5 includes a rotating frame 51, which is rotatably mounted on the upper end of the conical barrel 4. A conveying pipe 52 is mounted on the rotating frame 51, and fan blades 55 are evenly distributed on the outer wall of the conveying pipe 52. A diversion pipe 53, mounted on the rotating frame 51, is also mounted on the conveying pipe 52. Several spray heads 54 are located at the bottom of the diversion pipe 53 for evenly spraying the liquid absorbent into the tower body 1. A gas-liquid mixing self-priming pump 59 is located at the bottom of the conveying pipe 52. This pump draws the liquid absorbent from the bottom of the tower body 1 and delivers it to the spray heads 54. An inclined pipe 58 is located at the bottom of the gas-liquid mixing self-priming pump 59, and a suction element is located at the bottom of the inclined pipe 58 for drawing the liquid absorbent into the pump. The input end of the gas-liquid mixing self-priming pump 59 is connected to the rotating disk 57. The rotating disk 57 is used to drive the pump. The output end of the gas-liquid mixing self-priming pump 59 is connected to the delivery pipe 52 to ensure that the liquid absorbent can be smoothly delivered from the pump to the spray head 54. When the flue gas is conveyed upward from the bottom of the tower body 1, the flue gas will drive the fan blade 55 to rotate, which in turn drives the delivery pipe 52, the diversion pipe 53, the rotating frame 51, the gas-liquid mixing self-priming pump 59, and the inclined pipe 58 to rotate synchronously. The faster the flue gas flow rate is discharged upward inside the tower body 1, the faster the delivery pipe 52 will be driven to rotate by the fan blade 55. This makes the interval between the inclined pipe 58 in the liquid pumping and non-liquid pumping states shorter and shorter. In this way, the ammonia water sprayed by the spray head 54 can be mixed with the flue gas more evenly and quickly, thereby improving the efficiency and effect of flue gas treatment.

[0035] The design of the liquid suction component includes several key components, including an elastic telescopic tube 513 that communicates with the bottom of the inclined tube 58. The bottom of this elastic telescopic tube 513 is connected to a connecting cylinder 514. A pressure plate 511 is fixedly connected to the top of the connecting cylinder 514, and slide rods 510 that are slidably mounted on the inclined tube 58 are fixedly connected to the top periphery of the connecting cylinder 514. A damping spring 512, sleeved on the slide rod 510, is provided between the pressure plate 511 and the inclined tube 58 to provide the necessary elastic force. A guide rod 515 is fixedly connected to the inner end of 511. When the inclined tube 58 rotates, the guide rod 515 slides on the fixed cylinder 523 and the arc plate 524. At this time, the elastic telescopic tube 513 will expand and contract synchronously to accommodate the up and down movement of the pressure plate 511. When the guide rod 515 slides on the fixed cylinder 523, the connecting cylinder 514 and the pressure plate 511 move downward under the elastic force of the damping spring 512, so that the connecting cylinder 514 is sealed and inserted into the sleeve 521. Under the action of the force, the sealing connection between the connecting cylinder 514 and the sleeve 521 is maintained, thereby improving the sealing performance of the connection between the connecting cylinder 514 and the sleeve 521. This allows the gas-liquid mixing self-priming pump 59 to extract the liquid absorbent from the storage area through the inclined pipe 58, the elastic telescopic pipe 513, the connecting cylinder 514, the sleeve 521, and the liquid extraction pipe 522 when it is working. When the guide rod 515 moves onto the arc plate 524, the guide rod 515 moves upward under the action of the arc plate 524, causing the guide rod 515 to drive The pressure plate 511, connecting cylinder 514, and slide rod 510 move upward and compress the damping spring 512, causing the connecting cylinder 514 to disengage from the sleeve 521. As the guide rod 515 moves from the arc plate 524 to the fixed cylinder 523, the connecting cylinder 514 is sealed and inserted into another sleeve 521. This process is repeated, causing the gas-liquid mixing self-priming pump 59 to intermittently extract the liquid absorbent in the storage area and spray it out through the spray head 54. The liquid absorbent sprayed out by the spray head 54 mixes with the flue gas, thereby achieving the expected treatment effect.

[0036] In addition, the liquid suction device also includes a housing 56 fixedly installed inside the tower body 1. The inclined tube 58 is rotatably mounted on the housing 56 via a rotating disk 57, ensuring its flexible rotation capability. A support column 516 is fixedly connected inside the housing 56, and a rotating rod 517 is fixedly connected to the top of the support column 516. The top of the rotating rod 517 is fixedly connected to the outer wall of the inclined tube 58, ensuring synchronous rotation of the rotating rod 517 and the inclined tube 58. A dividing disk 518 is rotatably connected to the outer wall of the rotating rod 517 and fixedly installed on the top of the support column 516. The dividing disk 518 is fixedly installed inside the housing 56, dividing the inner cavity of the housing 56 into upper and lower parts. The lower part is the liquid storage area, and the upper part is the liquid storage area. Part of the tower is the working area, while the storage area is used to store liquid absorbents. These liquid absorbents can be selected according to specific needs, such as limestone slurry, citrate liquid, etc. The liquid absorbent reacts with sulfur dioxide in the flue gas to generate solid or liquid products, such as gypsum, sulfate, etc., thereby achieving desulfurization. In this process, the flue gas usually enters from the bottom of the tower body 1 and comes into countercurrent contact with the absorbent coming down from the spray assembly 5. This ensures that the sulfur dioxide in the flue gas is fully mixed and reacted with the absorbent. As the flue gas rises, it gradually comes into contact with and reacts with more absorbents, and finally the desulfurized clean flue gas is discharged from the top of the tower body 1, ensuring the high efficiency and environmental protection of flue gas treatment.

[0037] A circular groove 519 is formed on the surface of the dividing plate 518. A sliding plate 520 is slidably connected inside the groove 519. The sliding plate 520 can slide freely within the groove 519. At the upper end of the sliding plate 520, a sleeve 521 adapted to the connecting cylinder 514 is provided. A liquid extraction tube 522 is fixedly connected to the bottom of the sleeve 521. The liquid extraction tube 522 extends all the way to the bottom of the liquid storage area. When the connecting cylinder 514 is placed inside the sleeve 521, as the inclined tube 58 rotates, it can effectively drive a series of components, including the elastic telescopic tube 513, the pressure plate 511, the connecting cylinder 514, the sleeve 521, the sliding plate 520, and the liquid extraction tube 522, to achieve synchronous rotation operation.

[0038] At the bottom of the dividing plate 518, a fixed cylinder 523 is fixedly connected. At the top of the fixed cylinder 523, an arc-shaped plate 524 is fixedly connected. The positions of the fixed cylinder 523 and the arc-shaped plate 524 correspond to the positions of the guide rod 515. When the guide rod 515 slides inside the fixed cylinder 523, the pressure plate 511 and the connecting cylinder 514 will move downward due to the elastic force of the damping spring 512. When the guide rod 515 slides on the arc-shaped plate 524, it can drive the connecting cylinder 514, the pressure plate 511 and the slide rod 510 to move upward, and in this process, the damping spring 512 is compressed.

[0039] In an embodiment of the present invention, at the bottom of the tower body 1, as the flue gas begins to be conveyed upwards, it drives the fan blade 55 to rotate. The rotation of the fan blade 55, in turn, drives a series of components, including the conveying pipe 52, the diversion pipe 53, the rotating frame 51, the gas-liquid mixing self-priming pump 59, and the inclined pipe 58, to rotate synchronously. As the flue gas velocity inside the tower body 1 increases, the speed at which the fan blade 55 drives the conveying pipe 52 to rotate also increases accordingly. When the conveying pipe 52 rotates, it further drives the gas-liquid mixing self-priming pump 59, the rotating disk 57, the inclined pipe 58, the elastic telescopic pipe 513, the pressure plate 511, and the guide rod 515. The components, including the connecting cylinder 514, sleeve 521, sliding plate 520, and liquid extraction pipe 522, rotate together. When the connecting cylinder 514 is connected to the sleeve 521, the gas-liquid mixing self-priming pump 59 is started. This pump extracts the liquid absorbent from the storage area through the inclined pipe 58, elastic telescopic pipe 513, connecting cylinder 514, sleeve 521, and liquid extraction pipe 522. Subsequently, the gas-liquid mixing self-priming pump 59 delivers the liquid absorbent to the spray head 54 through the delivery pipe 52 and the diversion pipe 53. The liquid absorbent is sprayed out by the spray head 54, so that the liquid absorbent is mixed with the flue gas, thereby achieving the purpose of purifying the flue gas.

[0040] During the sliding process of the guide rod 515 on the fixed cylinder 523, the connecting cylinder 514 and the pressure plate 511 will move downward under the elastic force of the damping spring 512, ensuring that the connecting cylinder 514 can be sealed and inserted into the sleeve 521. The elastic force of the damping spring 512 helps to maintain the sealed connection between the connecting cylinder 514 and the sleeve 521, thereby improving the sealing performance of the connection. This sealing performance is crucial for the operation of the gas-liquid mixing self-priming pump 59, because it ensures the effective extraction of liquid absorbent from the storage area through the inclined pipe 58, the elastic telescopic pipe 513, the connecting cylinder 514, the sleeve 521, and the extraction pipe 522.

[0041] When the guide rod 515 moves onto the arc plate 524, the guide rod 515 moves upward under the action of the arc plate 524, which in turn drives the pressure plate 511, the connecting cylinder 514, and the slide rod 510 to move upward together, and compresses the damping spring 512. This action causes the connecting cylinder 514 to disengage from the sleeve 521. As the guide rod 515 moves from the arc plate 524 to the fixed cylinder 523, the connecting cylinder 514 will be sealed and inserted into another sleeve 521. This reciprocating motion enables the gas-liquid mixing self-priming pump 59 to intermittently draw liquid absorbent from the liquid storage area and spray it out through the spray head 54, so that the liquid absorbent sprayed out by the spray head 54 mixes with the flue gas, thereby achieving effective treatment of the flue gas.

[0042] By directly driving the rotation of the fan blades 55 and their subsequent components through the flue gas flow rate, the system achieves adaptive adjustment of the flue gas flow rate. This means that when the flue gas flow rate increases, the rotation speed of the relevant components will also increase accordingly, thereby treating the flue gas more effectively. This automatic adjustment mechanism not only improves the treatment efficiency but also reduces unnecessary energy consumption. The gas-liquid mixing self-priming pump 59 can intermittently extract the liquid absorbent from the storage area and spray it out through the spray head 54. This intermittent spraying method helps to ensure sufficient mixing between the liquid absorbent and the flue gas, thereby improving the absorption efficiency. At the same time, since the spray head 54 is connected to components such as the rotating conveying pipe 52, it can ensure the uniformity and coverage of the spray, further enhancing the treatment effect. Through the elastic force of the damping spring 512, the connecting cylinder 514 and the sleeve 521 can maintain a tight sealing connection. This design not only prevents the leakage of the liquid absorbent but also ensures the stable operation of the system. In addition, as the guide rod 515 moves, the connecting cylinder 514 can automatically switch to different sleeves 521, realizing intermittent extraction operations, further enhancing the flexibility and reliability of the system.

[0043] Example 2: Combination Figure 3 , Figure 8 , Figure 9 As shown, based on Embodiment 1, a fixed plate 527 is connected to the top of the conical barrel 4. Multiple exhaust holes 528 are arranged in a circumferential manner on the surface of the fixed plate 527. A filter cylinder 529 is rotatably connected to each exhaust hole 528. A fifth gear 537 is fixedly connected to the top of the filter cylinder 529. A top plate 525 is provided at the bottom of the inner cavity of the tower body 1. The top plate 525 is fixedly installed on the top of the conveying pipe 52. An internal gear ring 526 is fixedly connected to the bottom of the top plate 525.

[0044] On one side of the filter cartridge 529, there is a support frame 531, which is fixedly mounted on the fixed plate 527. A drive rod 532 is rotatably connected to the support frame 531. The drive rod 532 is provided with a first gear 533, a second gear 534, a third gear 535, and a seventh gear 547 from top to bottom. One side of the first gear 533 meshes with the internal gear ring 526. One side of the second gear 534 meshes with the fourth gear 536, which is rotatably mounted on the support frame 531. The other side of the fourth gear 536 meshes with the fifth gear 537. One side of the third gear 535 meshes with the external gear ring 538, which is rotatably mounted on the support frame 531. The external gear ring 538 and the filter cartridge 529 are on the same axis of rotation. A cleaning frame 539 is fixedly mounted on the inner end of the external gear ring 538. The inner end of the cleaning frame 539 is provided with bristles 540 for cleaning the outer wall of the filter cartridge 529.

[0045] A positioning shaft 541 is rotatably connected to the support frame 531. A sixth gear 546 and a disc 542 are rotatably connected to the positioning shaft 541. One side of the sixth gear 546 is meshed with a seventh gear 547. A transmission rod 543 is rotatably connected to the disc 542 off-center. The other end of the transmission rod 543 is rotatably connected to a striking rod 544. The striking rod 544 is slidably mounted on the support frame 531 through a fixed frame 545 and is used to strike the filter cartridge 529.

[0046] In an embodiment of the present invention, during the rotation of the conveying pipe 52, the top plate 525 and the internal gear ring 526 can be driven to rotate synchronously. While the internal gear ring 526 rotates, it will further drive the first gear 533 meshing with it to start rotating. The rotation of the first gear 533 will cause the drive rod 532 to rotate synchronously, thereby triggering the synchronous rotation of the second gear 534, the third gear 535 and the seventh gear 547. During the rotation of the second gear 534, it will mesh with the fourth gear 536, thereby causing the fourth gear 536 to start rotating as well. The rotation of the fourth gear 536 will further drive the fifth gear 537 and the filter cylinder 529 to rotate together.

[0047] At the same time, when the third gear 535 rotates, it will mesh with the outer gear ring 538, causing the outer gear ring 538 to also start rotating. The rotation direction of the outer gear ring 538 is opposite to the rotation direction of the filter cylinder 529. In this way, the outer gear ring 538 can drive the sweeping frame 539 and the bristles 540 to rotate synchronously. This reverse rotation design allows the bristles 540 to effectively clean the filter cylinder 529 that is rotating in the opposite direction.

[0048] In addition, when the seventh gear 547 rotates, it meshes with the sixth gear 546 and the positioning shaft 541, thereby causing the positioning shaft 541 to start rotating. The rotation of the positioning shaft 541 will drive the disc 542 to rotate together. The rotation of the disc 542 will cause the transmission rod 543 to reciprocate. The reciprocating movement of the transmission rod 543 will drive the striking rod 544 to reciprocate on the fixed frame 545, thereby causing the striking rod 544 to knock and vibrate to clean the outer wall of the filter cylinder 529.

[0049] The rotation of the conveying pipe 52 synchronously drives the rotation of the top plate 525, the internal gear ring 526, and a series of subsequent gear chains, thus achieving high efficiency in power transmission. The counter-rotation design of the brush 540 and the filter cartridge 529 ensures the cleanliness of the surface of the filter cartridge 529, effectively preventing clogging and extending the service life of the filter cartridge 529. The linkage design of the disc 542, the transmission rod 543, and the striking rod 544 ensures that the striking action can continuously and evenly vibrate and clean the filter cartridge 529, avoiding the occurrence of cleaning dead corners. This automated design of brush 540 cleaning and striking vibration cleaning greatly reduces the cost of manual maintenance and improves the operating efficiency of the entire system.

[0050] This invention also discloses a denitrification method for a combined soot blowing SCR denitrification device, specifically including the following steps:

[0051] Step 1: When the flue gas is conveyed upward from the bottom of the tower body 1, the flue gas drives the fan blade 55 to rotate, thereby causing the fan blade 55 to drive the conveying pipe 52, the diversion pipe 53, the rotating frame 51, the gas-liquid mixing self-priming pump 59, the inclined pipe 58, the elastic telescopic pipe 513, the pressure plate 511, the guide rod 515, the connecting cylinder 514, the sleeve 521, the sliding plate 520, and the liquid extraction pipe 522 to rotate synchronously.

[0052] Step 2: When the connecting cylinder 514 is connected to the sleeve 521, the gas-liquid mixing self-priming pump 59 is turned on. The gas-liquid mixing self-priming pump 59 extracts the liquid absorbent from the storage area through the inclined pipe 58, the elastic telescopic pipe 513, the connecting cylinder 514, the sleeve 521 and the liquid extraction pipe 522. Then, the gas-liquid mixing self-priming pump 59 delivers the liquid absorbent to the spray head 54 through the delivery pipe 52 and the diversion pipe 53. The liquid absorbent is sprayed out by the spray head 54, so that the liquid absorbent is mixed with the flue gas. After the flue gas is filtered by the filter cylinder 529, it is finally discharged through the air inlet pipe 2.

[0053] Step 3: When the conveying pipe 52 rotates, it ultimately drives the filter cylinder 529 to rotate, as well as the cleaning frame 539 and the brush 540 to rotate. The cleaning frame 539, the brush 540, and the filter cylinder 529 rotate in opposite directions, so that the brush 540 cleans the filter cylinder 529 which is rotating in the opposite direction. It also drives the striking rod 544 to move back and forth on the fixed frame 545, thereby causing the striking rod 544 to knock and vibrate to clean the outer wall of the filter cylinder 529.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined soot blowing SCR denitrification device, comprising a tower body (1), characterized in that: The tower body (1) is provided with an air inlet pipe (2) and an exhaust pipe (3) on the upper and lower sides respectively. A conical barrel (4) is fixedly installed inside the tower body (1), and a spray assembly (5) is provided on the conical barrel (4). The spray assembly (5) includes a rotating frame (51) rotatably mounted on a conical barrel (4), a conveying pipe (52) is provided on the rotating frame (51), a fan blade (55) is provided on the outer wall of the conveying pipe (52), a diversion pipe (53) is provided on the conveying pipe (52) mounted on the rotating frame (51), a number of spray heads (54) are provided at the bottom of the diversion pipe (53), a gas-liquid mixing self-priming pump (59) is provided at the bottom of the conveying pipe (52), an inclined pipe (58) is provided at the bottom of the gas-liquid mixing self-priming pump (59), and a liquid suction component is provided at the bottom of the inclined pipe (58). The liquid suction device includes an elastic telescopic tube (513) connected to the bottom of the inclined tube (58), a connecting tube (514) connected to the bottom of the elastic telescopic tube (513), a pressure plate (511) fixedly connected to the top of the connecting tube (514), a slide rod (510) fixedly connected to the top of the connecting tube (514) and slidably mounted on the inclined tube (58), a damping spring (512) sleeved on the slide rod (510) is provided between the pressure plate (511) and the inclined tube (58), and a guide rod (515) is fixedly connected to the inner end of the pressure plate (511). The liquid suction device also includes a box (56) fixedly installed inside the tower body (1), and the inclined tube (58) is rotatably installed on the box (56) via a rotating disk (57). A support column (516) is fixedly connected inside the box (56), and a rotating rod (517) is fixedly connected to the top of the support column (516). The top of the rotating rod (517) is fixedly connected to the outer wall of the inclined tube (58). A dividing disk (518) fixedly installed on the top of the support column (516) is rotatably connected to the outer wall of the rotating rod (517). The dividing disk (518) is fixedly installed in the inner cavity of the box (56). The dividing disk (518) divides the inner cavity of the box (56) into two parts: the lower part is the liquid storage area, and the upper part is the working area. A circular groove (519) is provided on the surface of the dividing plate (518). A sliding plate (520) is slidably connected in the circular groove (519). A sleeve (521) adapted to the connecting cylinder (514) is provided on the sliding plate (520). A liquid extraction pipe (522) is fixedly connected to the bottom of the sleeve (521). The liquid extraction pipe (522) extends to the bottom of the liquid storage area.

2. The SCR denitrification device with combined soot blowing according to claim 1, characterized in that: The bottom of the dividing plate (518) is fixedly connected to a fixed cylinder (523), and the top of the fixed cylinder (523) is fixedly connected to an arc plate (524). The positions of the fixed cylinder (523), the arc plate (524) and the guide rod (515) correspond to each other.

3. The SCR denitrification device with combined soot blowing according to claim 2, characterized in that: The top of the conical barrel (4) is connected to a fixed plate (527). The surface of the fixed plate (527) is provided with exhaust holes (528) in a circular array. A filter cylinder (529) is rotatably connected to the exhaust hole (528). A fifth gear (537) is fixedly connected to the top of the filter cylinder (529). The bottom of the inner cavity of the tower body (1) is provided with a top plate (525) fixedly installed on the top of the conveying pipe (52). An internal gear ring (526) is fixedly connected to the bottom of the top plate (525).

4. The SCR denitrification device with combined soot blowing according to claim 3, characterized in that: A support frame (531) is fixedly mounted on a fixed plate (527) on one side of the filter cartridge (529). A drive rod (532) is rotatably connected to the support frame (531). The drive rod (532) is provided with a first gear (533), a second gear (534), a third gear (535), and a seventh gear (547) from top to bottom. One side of the first gear (533) is meshed with an internal gear ring (526). One side of the second gear (534) is meshed with a fourth gear (536) rotatably mounted on the support frame (531), and the other side of the fourth gear (536) is meshed with a fifth gear (537).

5. The SCR denitrification device with combined soot blowing according to claim 4, characterized in that: The third gear (535) is meshed with an external gear ring (538) rotatably mounted on the support frame (531), and the external gear ring (538) and the filter cylinder (529) are on the same rotation axis. A cleaning frame (539) is fixedly mounted on the inner end of the external gear ring (538) and slidably mounted on the support frame (531). The inner end of the cleaning frame (539) is provided with bristles (540) for cleaning the outer wall of the filter cylinder (529).

6. The SCR denitrification device with combined soot blowing according to claim 5, characterized in that: A positioning shaft (541) is rotatably connected to the support frame (531). A sixth gear (546) and a disc (542) are rotatably connected to the positioning shaft (541). One side of the sixth gear (546) is meshed with the seventh gear (547). A transmission rod (543) is rotatably connected to the disc (542) off-center. A striking rod (544) for striking the filter cylinder (529) is rotatably connected to the other end of the transmission rod (543). The striking rod (544) is slidably mounted on the support frame (531) through a fixed frame (545).

7. The denitrification method of a combined soot blowing SCR denitrification device as described in any one of claims 1-6, characterized in that: Specifically, the following steps are included: Step 1: When the flue gas is conveyed upward from the bottom of the tower body (1), the flue gas drives the fan blade (55) to rotate, thereby causing the fan blade (55) to drive the conveying pipe (52), the diversion pipe (53), the rotating frame (51), the gas-liquid mixing self-priming pump (59), the inclined pipe (58), the elastic telescopic pipe (513), the pressure plate (511), the guide rod (515), the connecting cylinder (514), the sleeve (521), the sliding plate (520), and the liquid extraction pipe (522) to rotate synchronously. Step 2: When the connecting cylinder (514) is connected to the sleeve (521), the gas-liquid mixing self-priming pump (59) is turned on. The gas-liquid mixing self-priming pump (59) extracts the liquid absorbent from the storage area through the inclined pipe (58), elastic telescopic pipe (513), connecting cylinder (514), sleeve (521) and liquid extraction pipe (522). Then, the gas-liquid mixing self-priming pump (59) delivers the liquid absorbent to the spray head (54) through the delivery pipe (52) and the diversion pipe (53). The liquid absorbent is sprayed out by the spray head (54), so that the liquid absorbent is mixed with the flue gas. After the flue gas is filtered through the filter cylinder (529), it is finally discharged through the air inlet pipe (2). Step 3: When the delivery pipe (52) rotates, it eventually drives the filter cylinder (529) to rotate and the cleaning frame (539) and brush (540) to rotate. The cleaning frame (539), brush (540) and filter cylinder (529) rotate in opposite directions, so that the brush (540) cleans the filter cylinder (529) which is rotating in the opposite direction, and drives the striking rod (544) to move back and forth on the fixed frame (545), so that the striking rod (544) knocks and vibrates to clean the outer wall of the filter cylinder (529).

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