A sootblowing device for an SCR denitration reactor

Abstract

The present invention discloses a soot blowing device for an SCR denitration reactor, comprising: a fixing frame, on which a denitration outer shell and a soot blowing outer shell are fixedly arranged, and the denitration outer shell and the soot blowing outer shell are communicated. A catalytic unit for reducing nitrogen oxides in industrial flue gas is slidably inserted into the denitration outer shell. A support member for supporting the catalytic unit in the soot blowing state is fixedly arranged at the side end of the soot blowing outer shell, and the support member is arranged inside the soot blowing outer shell. A pushing device for moving the catalytic unit to the support member is arranged on the denitration outer shell; in the present invention, through the introduction device and the switching device, air can be automatically introduced into the next set of air bags, enabling multiple sets of catalytic units to be used in sequence, ensuring that the device can still perform denitration operation during the soot blowing process, thereby ensuring that the system can maintain high-efficiency operation at any time. This design not only improves the overall efficiency of the system but also reduces the possibility of human errors through automated operation, enhancing the reliability and stability of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of SCR denitration, and specifically to a soot blowing device for an SCR denitration reactor. Background Art

[0002] An SCR denitration reactor is a device used to reduce nitrogen oxide emissions in industrial flue gas. This technology reacts reducing agents such as ammonia or urea with nitrogen oxides in the flue gas under the action of a catalyst to produce harmless nitrogen and water. The soot blowing device of the SCR denitration reactor is to keep the surface of the catalyst clean and active, prevent the catalyst from being covered by deposits such as dust, fly ash, and ammonium sulfate salts, and affect the denitration efficiency. The function of the soot blowing device is to remove these deposits by physical or chemical methods to ensure the smoothness and efficient reaction of the catalyst surface.

[0003] Chinese Patent with Publication No. CN216537817U discloses an efficient soot blowing device for an SCR denitration reactor. Its structure includes a reactor main body, a catalyst layer arranged inside the reactor main body, an ash discharge pipe arranged on the reactor main body. A support plate is vertically arranged inside the reactor, an installation plate is vertically arranged on the support plate, a first driven shaft is rotatably connected to the side of the installation plate, an installation block is arranged at one end of the first driven shaft away from the installation plate, a second driven shaft is horizontally penetrated through the upper part of the installation block, the second driven shaft is rotatably connected to the installation block, a fixing frame is arranged at one end of the second driven shaft away from the installation block, an air disc is horizontally arranged on the fixing frame, and a plurality of air nozzles for soot blowing on the catalyst layer are arranged on the air disc. The advantages of this soot blowing device are that it is convenient to blow and clean the dead corner positions of the catalyst layer to prevent dust residue.

[0004] However, the above existing technology has the following deficiencies: When blowing the deposits on the surface of the catalyst inside the reactor, it is necessary to stop the denitration operation of the reactor to avoid interfering with the system operation and affecting the denitration efficiency and process safety. However, after the system is shut down, it takes a certain amount of time to check, preheat and perform other initialization steps to resume operation, which may cause startup delay and affect the denitration efficiency and emission control. Summary of the Invention

[0005] The purpose of the present invention is to provide a soot blowing device for an SCR denitration reactor to solve the problem that when blowing the deposits on the surface of the catalyst inside the reactor, it is necessary to stop the denitration operation of the reactor to avoid interfering with the system operation and affecting the denitration efficiency and process safety. However, after the system is shut down, it takes a certain amount of time to check, preheat and perform other initialization steps to resume operation, which may cause startup delay and affect the denitration efficiency and emission control.

[0006] To achieve the above object, the present invention provides the following technical solution: A soot blowing device for an SCR denitration reactor, comprising: a fixed frame, on which a denitration outer shell and a soot blowing outer shell are fixedly arranged, and the denitration outer shell and the soot blowing outer shell are communicated. A catalytic unit for reducing nitrogen oxides in industrial flue gas is slidably inserted into the denitration outer shell. A support member for supporting the catalytic unit in the soot blowing state is fixedly arranged on the side end of the soot blowing outer shell, and the support member is arranged inside the soot blowing outer shell. An ejection device for moving the catalytic unit to the support member is arranged on the denitration outer shell. An introduction device for introducing air into the ejection device is arranged on the ejection device. A switching device for switching the introduction position of the introduction device is arranged on the denitration outer shell;

[0007] The switching device includes a mounting plate and a mounting block fixedly connected to the denitration outer shell. A pusher is slidably inserted into the side end of the mounting plate. A first spring is sleeved on the pusher, and one end of the first spring is fixedly connected to the mounting plate and the other end is fixedly connected to the pusher. A push rod is slidably inserted into the mounting block. One end of the push rod is rotatably connected to a pull rod, and the pull rod abuts against the support member;

[0008] Among them, when the introduction device introduces air into the uppermost group of ejection devices on the denitration outer shell, as the air in the ejection device increases, the catalytic unit is pushed onto the corresponding support member. As the catalytic unit moves, it will push the pull rod, causing the pull rod to pull the push rod to move, so that the push rod abuts against the pusher, thereby pushing the pusher to move, changing the air outlet position of the introduction device, and allowing air to enter the next group of ejection devices to push out the next group of catalytic units.

[0009] As a further scheme of the present invention: A reset device for pushing the catalytic unit that has completed soot blowing back into the denitration outer shell is arranged inside the soot blowing outer shell.

[0010] As a further scheme of the present invention: A dust cleaning device for blowing off the deposits on the surface of the catalytic unit when the ejection device pushes out the catalytic unit is arranged on the denitration outer shell.

[0011] As a further scheme of the present invention: Fixed strips for supporting and fixing the catalytic unit are fixedly connected inside the denitration outer shell, and guide grooves for guiding the moving direction of the ejection device are opened inside the denitration outer shell.

[0012] As a further scheme of the present invention: The support member includes a mounting frame arranged inside the soot blowing outer shell and fixedly connected to the denitration outer shell. A support shaft is rotatably connected inside the mounting frame, and a limiting plate for limiting the catalytic unit is fixedly connected to the outside of the support shaft.

[0013] As a further solution of the present invention: The pushing device includes a receiving box that is connected to the denitration housing in a penetrating manner. An airbag is movably arranged in the receiving box. One end of the airbag is fixedly connected to a guiding plate, and the guiding plate is slidably connected to the guiding groove. The other end of the airbag is connected to an inlet pipe in a penetrating manner, and the inlet pipe penetrates through the receiving box. A flow groove is formed in the airbag in a penetrating manner.

[0014] As a further solution of the present invention: The introducing device includes a fixing plate fixedly connected to the denitration housing. One end of the fixing plate is fixedly connected to a flow pipe. One end of the flow pipe is connected to an outlet pipe in a penetrating manner. A first plugging member is slidably inserted into the top end of the flow pipe. A second plugging member is slidably inserted into one end of the outlet pipe. One end of the second plugging member is slidably inserted into the inlet pipe. One ends of the first plugging member and the second plugging member are fixedly arranged with a pushing member. The bottom end of the flow pipe is connected to a connecting pipe in a penetrating manner. One end of the connecting pipe is connected to a scroll air pump in a penetrating manner, and the scroll air pump is fixedly connected to the denitration housing.

[0015] As a further solution of the present invention: The first plugging member includes a connecting frame slidably inserted into the flow pipe. A partition plate is fixedly connected inside the connecting frame. A communication hole is formed in the partition plate in a penetrating manner. The second plugging member is also provided with a connecting frame, a partition plate, and a communication hole.

[0016] As a further solution of the present invention: The reset device includes a telescopic rod fixedly connected to the inner wall of the soot blowing housing. One end of the telescopic rod is fixedly connected to a reset plate. A second spring is sleeved outside the telescopic rod, and one end of the second spring abuts against the inner wall of the soot blowing housing, and the other end of the second spring abuts against the reset plate. A synchronous rod is slidably inserted into the reset plate. A third spring is fixedly connected to the synchronous rod. One end of the third spring is fixedly connected to the reset plate, and one end of the synchronous rod penetrates through the reset plate and abuts against the catalytic unit.

[0017] As a further solution of the present invention: The ash cleaning device includes a centrifugal air pump fixedly connected to the denitration housing. The output end of the centrifugal air pump is connected to an outlet pipe in a penetrating manner. A dust removal pipe is connected to the side end of the outlet pipe. A dust removal groove is formed in the dust removal pipe in a penetrating manner. The dust removal pipe is connected to a connecting plate in a penetrating manner, and the connecting plate is fixedly connected to the denitration housing.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In the present invention, the pushing device can automatically push the catalytic unit out of the denitration outer shell onto the support. This automated operation reduces the need for manual intervention, improves the efficiency and safety of the system. The operation of pushing the catalytic unit out of the denitration outer shell avoids interference from industrial flue gas during soot blowing inside the denitration outer shell, ensuring more thorough and efficient soot blowing. At the same time, the flow channels on the upper three groups of airbags allow industrial flue gas to pass through normally, while the lowermost group of airbags can block inside the denitration outer shell when inflated to push out the corresponding catalytic unit, preventing industrial flue gas from passing through. This design neither affects normal denitration work nor can effectively isolate during the soot blowing process;

[0020] 2. In the present invention, the air introduction device and the switching device can automatically introduce air into the next group of airbags, enabling multiple groups of catalytic units to be used in sequence, ensuring that the device can still perform denitration operations during soot blowing, and thus ensuring that the system can maintain high - efficiency operation at any time. This design not only improves the overall efficiency of the system but also reduces the possibility of human error through automated operation, enhancing the reliability and stability of the system. At the same time, by precisely controlling the position and time of air introduction, it ensures that each group of catalytic units can work under optimal conditions, further improving the effect of the denitration reaction;

[0021] 3. In the present invention, the reset device can enable the four groups of catalytic units to return to the denitration outer shell synchronously and smoothly after the soot blowing operation, quickly restoring the entire device to its initial state, reducing the need for manual intervention, improving operation efficiency and safety. The automated reset process ensures that the catalytic units can be accurately reset according to the preset sequence and time, avoiding errors and potential safety hazards that may be brought by manual operation. The automated nature of the reset device also reduces the labor intensity of operators, further enhancing the overall reliability and operational stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the overall structural schematic diagram of a soot blowing device for an SCR denitration reactor described in the present invention;

[0023] Figure 2 is the internal structural schematic diagram of the denitration outer shell in the denitration state of a soot blowing device for an SCR denitration reactor described in the present invention;

[0024] Figure 3 is the internal structural schematic diagram of the denitration outer shell in the soot blowing state of a soot blowing device for an SCR denitration reactor described in the present invention;

[0025] Figure 4 is the internal structural schematic diagram of the denitration outer shell in the reset state of a soot blowing device for an SCR denitration reactor described in the present invention;

[0026] Figure 5 It is a partial structural cross-sectional view of the denitration outer shell in the soot blowing device of an SCR denitration reactor described in the present invention;

[0027] Figure 6 It is a schematic structural diagram of the pushing device in the soot blowing device of an SCR denitration reactor described in the present invention;

[0028] Figure 7 It is a schematic structural diagram of the airbag in the soot blowing device of an SCR denitration reactor described in the present invention;

[0029] Figure 8 It is a schematic structural diagram of the switching device in the soot blowing device of an SCR denitration reactor described in the present invention;

[0030] Figure 9 It is a schematic structural diagram of the flow pipe in the soot blowing device of an SCR denitration reactor described in the present invention;

[0031] Figure 10 It is a schematic structural diagram of the first plugging member in the soot blowing device of an SCR denitration reactor described in the present invention;

[0032] Figure 11 It is a schematic structural diagram of the reset device in the soot blowing device of an SCR denitration reactor described in the present invention;

[0033] Figure 12 It is a schematic structural diagram of the ash cleaning device in the soot blowing device of an SCR denitration reactor described in the present invention.

[0034] In the figure: 1. Fixed frame; 2. Denitration outer shell; 21. Fixed strip; 22. Guide groove; 3. Soot blowing outer shell; 4. Support member; 41. Installation frame; 42. Support shaft; 43. Limiting plate; 5. Pushing device; 51. Receiving box; 52. Airbag; 53. Guide plate; 54. Introduction pipe; 55. Flow channel; 6. Introduction device; 61. Fixed plate; 62. Flow pipe; 63. Discharge pipe; 64. First plugging member; 641. Connection frame; 642. Partition plate; 643. Communication hole; 65. Second plugging member; 66. Connection pipe; 67. Vortex air pump; 7. Switching device; 71. Installation plate; 72. Pushing member; 73. First spring; 74. Installation block; 75. Push rod; 76. Pull rod; 8. Reset device; 81. Telescopic rod; 82. Reset plate; 83. Second spring; 84. Synchronous rod; 85. Third spring; 9. Ash cleaning device; 91. Centrifugal air pump; 92. Air outlet pipe; 93. Connection plate; 94. Dust removal pipe; 95. Dust removal groove; 10. Catalytic unit. Detailed implementation manners

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The following will describe the embodiments according to the overall structure of the present invention.

[0037] Refer to Figures 1 to 4, in the embodiment of the present invention, a soot blowing device for an SCR denitration reactor includes: a fixing frame 1, on which a denitration outer shell 2 and a soot blowing outer shell 3 are fixedly arranged, and the denitration outer shell 2 and the soot blowing outer shell 3 are communicated. A catalytic unit 10 for reducing nitrogen oxides in industrial flue gas is slidably inserted into the denitration outer shell 2. There are four groups of catalytic units 10 evenly distributed in the denitration outer shell 2. A support member 4 for supporting the catalytic unit 10 in the soot blowing state is fixedly arranged at the side end of the soot blowing outer shell 3. There are four groups of support members 4 evenly distributed at the side end of the soot blowing outer shell 3, and the support member 4 is arranged inside the soot blowing outer shell 3. An ejection device 5 for moving the catalytic unit 10 to the support member 4 is arranged on the denitration outer shell 2. There are four groups of ejection devices 5 evenly distributed at the side end of the soot blowing outer shell 3. An introduction device 6 for introducing air into the ejection device 5 is arranged on the ejection device 5. A switching device 7 for switching the introduction position of the introduction device 6 is arranged on the denitration outer shell 2. There are three groups of switching devices 7 evenly distributed at the side end of the denitration outer shell 2. A reset device 8 for pushing the catalytic unit 10 that has completed soot blowing back into the denitration outer shell 2 is arranged inside the soot blowing outer shell 3. A dust cleaning device 9 for blowing off the deposits on the surface of the catalytic unit 10 when the ejection device 5 ejects the catalytic unit 10 is arranged on the denitration outer shell 2;

[0038] The switching device 7 includes a mounting plate 71 and a mounting block 74 fixedly connected to the denitration outer shell 2, and the mounting plate 71 and the mounting block 74 are respectively arranged on two sides of the side end of the denitration outer shell 2. A pushing member 72 is slidably inserted into the side end of the mounting plate 71. The pushing member 72 is T-shaped and consists of a set of straight plates and a set of straight rods. A first spring 73 is sleeved on the pushing member 72, and one end of the first spring 73 is fixedly connected to the mounting plate 71, and the other end is fixedly connected to the straight plate in the pushing member 72. A push rod 75 is slidably inserted into the mounting block 74. The push rod 75 is L-shaped and consists of two sets of straight rods. One set of straight rods penetrates through the mounting block 74 and is slidably inserted into the mounting block 74, and the contact surface between the other set of straight rods in the push rod 75 and the straight rod in the pushing member 72 is an inclined surface. One end of the push rod 75 is rotatably connected to a pull rod 76. The pull rod 76 is C-shaped and consists of three sets of straight rods. One set of straight rods penetrates through the push rod 75 and is rotatably connected to the push rod 75, and the other set of straight rods abuts against the support member 4;

[0039] Among them, when the introduction device 6 introduces air into the topmost set of ejection devices 5 on the denitration outer shell 2, as the air in the ejection device 5 increases, the catalytic unit 10 is pushed onto the corresponding support member 4. As the catalytic unit 10 moves, it will push the pull rod 76, causing the pull rod 76 to pull the push rod 75 to move, making the push rod 75 abut against the pushing member 72, thereby pushing the pushing member 72 to move, changing the air outlet position of the introduction device 6, and making the air enter the next set of ejection devices 5 to eject the next set of catalytic units 10.

[0040] For this description, in this technical solution, the catalytic unit 10 adopts the existing technology and is composed of a honeycomb catalyst material containing active components, which is responsible for promoting the reduction reaction, reacting reducing agents such as ammonia or urea with nitrogen oxides in the flue gas to generate harmless nitrogen and water.

[0041] Refer to Figure 5 , inside the denitration outer shell 2, there are fixed bars 21 fixedly connected to support and fix the catalytic unit 10. There are sixteen groups of fixed bars 21, symmetrically distributed at the upper and lower ends of the four groups of catalytic units 10. Inside the denitration outer shell 2, there are guide grooves 22 for guiding the movement direction of the pushing device 5. There are eight groups of guide grooves 22, symmetrically opened on the inner wall of the denitration outer shell 2. The support member 4 includes an installation frame 41 arranged inside the soot blowing outer shell 3 and fixedly connected to the denitration outer shell 2. Inside the installation frame 41, there is a support shaft 42 rotatably connected. There are multiple groups of support shafts 42, evenly distributed inside the installation frame 41. Outside the support shaft 42, there is a limiting plate 43 for limiting the catalytic unit 10. There are two limiting plates 43 on the outside of each group of support shafts 42, and the distance between the two limiting plates 43 is the same as the width of the catalytic unit 10. Due to the inclined shapes of the fixed bars 21, the guide grooves 22, and the support member 4, and the gravitational force of the catalytic unit 10, when a part of the catalytic unit 10 is pushed out, it will move automatically on the support member 4.

[0042] Adopting the above solution: By designing the fixed bars 21 and the guide grooves 22 to be inclined, the self-weight of the catalytic unit 10 and the guiding effect of the inclined plane can be utilized to naturally push out the catalytic units 10 from the denitration outer shell 2 one by one. This design reduces the need for external driving force and makes the pushing process of the catalytic unit 10 smoother and more automated.

[0043] Refer to Figures 6 to 7 , the pushing device 5 includes a receiving box 51 connected to the denitration outer shell 2 in a penetrating manner. Inside the receiving box 51, there is an airbag 52 movably arranged. One end of the airbag 52 is fixedly connected to a guide plate 53, and the guide plate 53 is slidably connected to the guide groove 22. The other end of the airbag 52 is connected to an inlet pipe 54 in a penetrating manner, and the inlet pipe 54 penetrates through the receiving box 51. The four groups of airbags 52 are evenly distributed from top to bottom inside the denitration outer shell 2, and among them, the upper three groups of airbags 52 are provided with through-flow grooves 55. The through-flow grooves 55 are rectangular and triangular, enabling industrial flue gas to pass through. The airbag 52 is rectangular, and the length and width of the unfolded airbag 52 are greater than the length and width of the denitration outer shell 2. When the lowermost group of airbags 52 is filled with gas inside the denitration outer shell 2 and pushes out the corresponding group of catalytic units 10, this group of airbags 52 can block inside the denitration outer shell 2 to prevent industrial flue gas from passing through.

[0044] Adopting the above solution: The pushing device 5 can automatically push the catalytic unit 10 out of the denitration housing 2 onto the support 4, reducing the need for manual intervention. This automated operation improves the efficiency and safety of the system. Especially in the case where the catalytic unit 10 needs to be replaced frequently, there are four groups of pushing devices 5 evenly distributed on the side end of the soot blowing housing 3 to ensure that each group of catalytic units 10 can be pushed out in a predetermined order and time. This evenly distributed design ensures the stability and consistency of the system.

[0045] Referring to Figures 8 to 10 , the introduction device 6 includes a fixing plate 61 fixedly connected to the denitration housing 2. The fixing plate 61 is L-shaped. One end of the fixing plate 61 is fixedly connected to a flow pipe 62. One end of the flow pipe 62 is connected through a lead-out pipe 63. A first plugging member 64 is slidably inserted into the top of the flow pipe 62. A second plugging member 65 is slidably inserted into one end of the lead-out pipe 63. One end of the second plugging member 65 is slidably inserted into the inlet pipe 54. One ends of the first plugging member 64 and the second plugging member 65 are fixedly arranged with a pushing member 72. There are four groups of fixing plates 61, flow pipes 62, lead-out pipes 63 and second plugging members 65 arranged in the introduction device 6. There are three groups of first plugging members 64. The four flow pipes 62 are connected together through the three first plugging members 64. The top of the top group of flow pipes 62 is in a sealed state. The bottom of the bottom group of flow pipes 62 is connected through a connecting pipe 66. One end of the connecting pipe 66 is connected through a scroll air pump 67. The scroll air pump 67 is fixedly connected to the denitration housing 2. The first plugging member 64 includes a connecting frame 641 slidably inserted into the flow pipe 62. A partition plate 642 is fixedly connected inside the connecting frame 641. A communication hole 643 is formed through the partition plate 642. The second plugging member 65 is also provided with a connecting frame 641, a partition plate 642 and a communication hole 643. When a group of catalytic units 10 is completely removed, the catalytic unit 10 will abut against the pull rod 76 and push the pull rod 76, causing the pull rod 76 to pull the push rod 75 to move, so that the push rod 75 abuts against the inclined surface of the pushing member 72, causing the first spring 73 to stretch and push the pushing member 72 to move, thereby driving the first plugging member 64 and the second plugging member 65 fixedly connected to the pushing member 72 to move, so that the communication hole 643 of the first plugging member 64 moves out of the corresponding positions of the two flow pipes 62, and the partition plate 642 is inserted between the two flow pipes 62 to partition them, and the communication hole 643 in the second plugging member 65 is inserted between the second lead-out pipe 63 and the second inlet pipe 54 to connect the second lead-out pipe 63 and the second inlet pipe 54, and bring air into the second airbag 52.

[0046] For this purpose, in the present technical solution, the vortex air pump 67 adopts the existing technology and is a high-efficiency, low-noise gas delivery equipment, which is widely used in various industrial and commercial fields. Its working principle is based on a pair of mutually meshing vortex rotors, which generate vacuum or compressed air through rotational motion. The vortex air pump 67 operates in both directions and can be used as a vacuum pump for suction and as a compressed air pump for blowing.

[0047] By adopting the above scheme, the air introduction position can be precisely controlled through the introduction device 6 to ensure that the air can accurately enter the airbag 52 in the ejection device 5. This precise control improves the stability and reliability of the system and ensures that each group of catalytic units 10 can be ejected in a predetermined order and time.

[0048] Reference Figure 11 The reset device 8 includes a telescopic rod 81 fixedly connected to the inner wall of the sootblowing shell 3, and the telescopic rod 81 is provided with two groups, which are symmetrically distributed on the inner wall of the sootblowing shell 3. One end of the telescopic rod 81 is fixedly connected to a reset plate 82, and the reset plate 82 is U-shaped. A set of springs 83 is sleeved on the outside of each set of telescopic rods 81, and one end of the spring 83 abuts against the inner wall of the sootblowing shell 3, and the other end of the spring 83 abuts against the reset plate 82. A synchronization rod 84 is slidably inserted on the reset plate 82. The synchronization rod 84 is provided with six groups, which are symmetrically distributed on both sides of the three groups of catalytic units 10. The synchronization rod 84 is T-shaped, and a spring three 85 is fixedly connected to the synchronization rod 84. One end of the spring three 85 is fixedly connected to the reset plate 82. Two sets of springs 85 are provided on each set of synchronization rods 84, which are symmetrically distributed on both sides of the T-shaped synchronization rod 84, and one end of the synchronization rod 84 It penetrates the reset plate 82 and abuts against the catalytic unit 10. The contact surface of the synchronization rod 84 and the catalytic unit 10 is an cambered surface. When the last group of catalytic units 10 is pushed out, it abuts against the reset plate 82. At this time, due to the positive force on the telescopic rod 81, the spring two 83 and the telescopic rod 81 are contracted, thereby pushing the reset plate 82 to move. When the last group of catalytic units 10 is completely pushed out, the synchronization rods 84 on both sides of the reset plate 82 move to the front end of the catalytic unit 10. Under the action of the spring three 85, the synchronization rod 84 is reset, so that the spacing between the synchronization rods 84 on both sides is less than the width of the catalytic unit 10. Finally, the vortex air pump 67 is started to inhale, and the gas in the lowest air bag 52 is reduced. At this time, the force on the spring two 83 is reduced, pushing the reset plate 82 to reset, and under the action of the synchronization rod 84, all catalytic units 10 are reset synchronously.

[0049] By adopting the above scheme, the catalytic unit 10 after soot blowing can be automatically pushed back into the denitrification housing 2 through the resetting device 8. This automated operation reduces the need for manual intervention and improves the efficiency and safety of the system. Through the coordinated work of the telescopic rod 81 and the resetting plate 82, the system can automatically complete the resetting process of the catalytic unit 10.

[0050] ReferenceFigure 12 , the dust cleaning device 9 includes a centrifugal air pump 91 fixedly connected to the denitration outer shell 2. The output end of the centrifugal air pump 91 is connected to an air outlet pipe 92 through penetration. A dust removal pipe 94 is connected to the side end of the air outlet pipe 92 through penetration. There are four groups of dust removal pipes 94, which are evenly distributed above each group of catalytic units 10. A set of dust removal grooves 95 are penetrated and opened on each group of dust removal pipes 94. Each group of dust removal pipes 94 is connected through two connecting plates 93. The two connecting plates 93 are symmetrically distributed on both sides of the denitration outer shell 2 and are fixedly connected to the denitration outer shell 2.

[0051] For this explanation, in this technical solution, the centrifugal air pump 91 adopts the existing technology and is a gas conveying device widely used in industrial and commercial fields. It generates centrifugal force through the rotation of the impeller, pushing the gas from the center to the outside, thereby increasing the pressure of the gas.

[0052] Adopting the above solution: The high-pressure air flow generated by the centrifugal air pump 91 discharges the air from the air outlet pipe 92 through the dust removal grooves 95 on the dust removal pipes 94 and directly blows it onto the surface of the catalytic unit 10. This direct and powerful blowing method can efficiently remove the dust and impurities deposited on the surface of the catalyst, ensuring that the activity of the catalyst is not affected.

[0053] The working principle of the present invention is as follows: When in use, first start the vortex air pump 67 to introduce air into the flow tube 62. At this time, the four groups of flow tubes 62 correspond to the communication holes 643 in the three groups of first blocking members 64, so that the four groups of flow tubes 62 are communicated. And the communication holes 643 in the topmost group of second blocking members 65 correspond to the topmost inlet tube 54 and outlet tube 63 respectively, so that the inlet tube 54 and outlet tube 63 of this group are communicated, and air is introduced into the topmost group of air bags 52. As the gas in the air bag 52 increases, the air bag 52 drives the guide plate 53 and gradually pushes the topmost group of catalytic units 10 out of the denitration outer shell 2 onto the support shaft 42 along the direction of the guide groove 22. When the catalytic unit 10 is pushed out, start the centrifugal air pump 91 at the same time, so that air enters from the air outlet pipe 92 and is discharged from the dust removal tank 95, and the air is pressurized and blown onto the catalytic unit 10 to blow off the deposits on the catalytic unit 10. And when the catalytic unit 10 is pushed out, the catalytic unit 10 abuts against the synchronous rod 84. Since the telescopic rod 81 is arranged below the reset plate 82, the telescopic rod 81 cannot receive the maximum force, resulting in the synchronous rod 84 moving outward and the third spring 85 stretching until the distance between the two synchronous rods 84 is greater than the width of the catalytic unit 10, allowing the catalytic unit 10 to pass through. Due to the inclined shapes of the fixing strip 21, the guide groove 22 and the support member 4, and the gravitational force of the catalytic unit 10, when the catalytic unit 10 is pushed out partially, it will move on its own on the support member 4. When the catalytic unit 10 is completely removed, at this time the air bag 52 is not filled with gas, the catalytic unit 10 will abut against the pull rod 76 and push the pull rod 76, so that the pull rod 76 pulls the push rod 75 to move, so that the push rod 75 abuts against the inclined surface of the pushing member 72, causing the first spring 73 to stretch and pushing the pushing member 72 to move, thereby driving the first blocking member 64 and the second blocking member 65 fixedly connected to the pushing member 72 to move, so that the communication hole 643 of the first blocking member 64 moves out of the corresponding position of the two groups of flow tubes 62, and the partition plate 642 is inserted between the two groups of flow tubes 62 to block them, and the communication hole 643 in the second blocking member 65 is inserted between the second outlet tube 63 and the second inlet tube 54, so that the second outlet tube 63 and the second inlet tube 54 are communicated, and air is brought into the second air bag 52 to move the second catalytic unit 10 out of the denitration outer shell 2. As the operation progresses, when the last group of catalytic units 10 is pushed out, it abuts against the reset plate 82. At this time, since the telescopic rod 81 is under positive force, the second spring 83 and the telescopic rod 81 contract, thereby pushing the reset plate 82 to move. When the last group of catalytic units 10 is completely pushed out, the air bag 52 without a flow groove 55 at the bottom unfolds. At this time, this group of air bags 52 is filled with gas to block the inside of the denitration outer shell 2 to prevent industrial flue gas from passing through. And when the last group of catalytic units 10 is completely pushed out, the synchronous rods 84 on both sides of the reset plate 82 move to the front end of the catalytic unit 10, and under the action of the third spring 85, the synchronous rods 84 are reset, so that the distance between the two synchronous rods 84 is less than the width of the catalytic unit 10. Finally, start the vortex air pump 67 to inhale air.Reduce the gas in the lowermost airbag 52. At this time, the force on the second spring 83 decreases, pushing the reset plate 82 to reset. Under the action of the synchronizing rod 84, all the catalytic units 10 are synchronously reset. At this time, since the airbag 52 provided with the flow grooves 55 is not filled with gas, all the catalytic units 10 can synchronously move a certain distance. After losing the abutment of the catalytic units 10, the switching device 7 will also reset to a certain extent, causing the first blocking member 64 and the second blocking member 65 to move to the central position. In this state, a part of the communication holes 643 in all the first blocking members 64 and the second blocking members 65 is located between the two sets of flow pipes 62 and between the outlet pipe 63 and the inlet pipe 54, making all the airbags 52 in a communicating state. At this time, the scroll air pump 67 starts at its maximum power to extract all the gas in all the airbags 52. After that, the reset device 8 pushes all the catalytic units 10 to reset, returning the device to its initial state; Through the ejection device 5, the catalytic units 10 can be automatically ejected from the denitration outer shell 2 onto the support member 4. This automated operation reduces the need for manual intervention, improving the efficiency and safety of the system. The operation of ejecting the catalytic units 10 from the denitration outer shell 2 avoids interference from industrial flue gas during soot blowing in the denitration outer shell 2, ensuring a more thorough and efficient soot blowing effect. At the same time, the flow grooves 55 on the upper three groups of airbags 52 allow industrial flue gas to pass through normally, while when the lowermost group of airbags 52 is filled with gas and pushes out the corresponding catalytic units 10, it can block in the denitration outer shell 2 to prevent industrial flue gas from passing through. This design neither affects normal denitration work nor can effectively isolate during the soot blowing process. Through the introduction device 6 and the switching device 7, air can be automatically introduced into the next group of airbags 52, enabling multiple groups of catalytic units 10 to be used in sequence, ensuring that the device can still perform denitration operations during the soot blowing process, thereby ensuring that the system can maintain high-efficiency operation at any time. This design not only improves the overall efficiency of the system but also reduces the possibility of human errors through automated operations, enhancing the reliability and stability of the system. At the same time, by precisely controlling the position and time of air introduction, it ensures that each group of catalytic units 10 can work under optimal conditions, further improving the effect of the denitration reaction. Through the reset device 8, the four groups of catalytic units 10 can synchronously and smoothly return to the denitration outer shell 2 after the soot blowing operation, quickly restoring the entire device to its initial state, reducing the need for manual intervention, improving the operation efficiency and safety. The automated reset process ensures that the catalytic units 10 can accurately reset according to the preset sequence and time, avoiding errors and potential safety hazards that may be caused by manual operations. The automated feature of the reset device 8 also reduces the labor intensity of the operators, further enhancing the overall reliability and operational stability of the system.,

[0054] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, shall be covered by the protection scope of the present invention.

Claims

1. A sootblowing device for an SCR denitration reactor, comprising: Fixing frame (1), on which a denitration outer shell (2) and a soot blowing outer shell (3) are fixedly arranged, and the denitration outer shell (2) and the soot blowing outer shell (3) are communicated. It is characterized in that a catalytic unit (10) for reducing nitrogen oxides in industrial flue gas is slidably inserted into the denitration outer shell (2). A support member (4) for supporting the catalytic unit (10) in the soot blowing state is fixedly arranged on the side end of the soot blowing outer shell (3), and the support member (4) is arranged in the soot blowing outer shell (3). An ejecting device (5) for moving the catalytic unit (10) to the support member (4) is arranged on the denitration outer shell (2). An introducing device (6) for introducing air into the ejecting device (5) is arranged on the ejecting device (5). A switching device (7) for switching the introducing position of the introducing device (6) is arranged on the denitration outer shell (2). The switching device (7) includes a mounting plate (71) and a mounting block (74) fixedly connected to the denitration outer shell (2). A pushing member (72) is slidably inserted into the side end of the mounting plate (71). A first spring (73) is sleeved on the pushing member (72), and one end of the first spring (73) is fixedly connected to the mounting plate (71), and the other end is fixedly connected to the pushing member (72). A push rod (75) is slidably inserted into the mounting block (74). One end of the push rod (75) is rotatably connected to a pull rod (76), and the pull rod (76) abuts against the support member (4). Among them, when the introducing device (6) introduces air into the uppermost group of ejecting devices (5) on the denitration outer shell (2), as the air in the ejecting device (5) increases, the catalytic unit (10) is pushed onto the corresponding support member (4). As the catalytic unit (10) moves, it will push the pull rod (76), causing the pull rod (76) to pull the push rod (75) to move, so that the push rod (75) abuts against the pushing member (72), thereby pushing the pushing member (72) to move, changing the air outlet position of the introducing device (6), and making the air enter the next group of ejecting devices (5) to push out the next group of catalytic units (10).

2. The soot blowing device of an SCR denitration reactor according to claim 1, characterized in that, A reset device (8) for pushing the catalytic unit (10) that has completed soot blowing back into the denitration outer shell (2) is arranged in the soot blowing outer shell (3).

3. The soot blowing device of an SCR denitration reactor according to claim 2, wherein A dust cleaning device (9) for blowing off the deposits on the surface of the catalytic unit (10) when the ejecting device (5) pushes out the catalytic unit (10) is arranged on the denitration outer shell (2).

4. The soot blowing device of an SCR denitration reactor according to claim 3, characterized in that, A fixing strip (21) for supporting and fixing the catalytic unit (10) is fixedly connected inside the denitration outer shell (2). A guiding groove (22) for guiding the reverse movement of the ejecting device (5) is opened inside the denitration outer shell (2).

5. The soot blowing device of an SCR denitration reactor according to claim 4, characterized in that, The support member (4) includes a mounting frame (41) arranged in the soot blowing outer shell (3) and fixedly connected to the denitration outer shell (2). A support shaft (42) is rotatably connected inside the mounting frame (41). A limiting plate (43) for limiting the catalytic unit (10) is fixedly connected to the outside of the support shaft (42).

6. The soot blowing device of an SCR denitration reactor according to claim 5, characterized in that, The pushing device (5) includes a receiving box (51) that is connected to the denitration outer shell (2) in a penetrating manner. An airbag (52) is movably arranged in the receiving box (51). One end of the airbag (52) is fixedly connected to a guiding plate (53), and the guiding plate (53) is slidably connected to a guiding groove (22). The other end of the airbag (52) is connected to an inlet pipe (54) in a penetrating manner, and the inlet pipe (54) penetrates through the receiving box (51). A flow groove (55) is formed in the airbag (52) in a penetrating manner.

7. The soot blowing device of an SCR denitration reactor according to claim 6, characterized in that, The introducing device (6) includes a fixing plate (61) fixedly connected to the denitration outer shell (2). One end of the fixing plate (61) is fixedly connected to a flow pipe (62). One end of the flow pipe (62) is connected to an outlet pipe (63) in a penetrating manner. A first plugging member (64) is slidably inserted into the top end of the flow pipe (62). A second plugging member (65) is slidably inserted into one end of the outlet pipe (63). One end of the second plugging member (65) is slidably inserted into the inlet pipe (54). One ends of the first plugging member (64) and the second plugging member (65) are fixedly arranged with a pushing member (72). The bottom end of the flow pipe (62) is connected to a connecting pipe (66) in a penetrating manner. One end of the connecting pipe (66) is connected to a scroll air pump (67) in a penetrating manner, and the scroll air pump (67) is fixedly connected to the denitration outer shell (2).

8. The sootblowing device of an SCR denitration reactor according to claim 7, characterized in that, The first plugging member (64) includes a connecting frame (641) slidably inserted into the flow pipe (62). A partition plate (642) is fixedly connected inside the connecting frame (641). A communication hole (643) is formed in the partition plate (642) in a penetrating manner. The second plugging member (65) is also provided with a connecting frame (641), a partition plate (642), and a communication hole (643).

9. The soot blowing device of an SCR denitration reactor according to claim 8, characterized in that, The reset device (8) includes a telescopic rod (81) fixedly connected to the inner wall of the soot blowing outer shell (3). One end of the telescopic rod (81) is fixedly connected to a reset plate (82). A second spring (83) is sleeved outside the telescopic rod (81), and one end of the second spring (83) abuts against the inner wall of the soot blowing outer shell (3), and the other end of the second spring (83) abuts against the reset plate (82). A synchronous rod (84) is slidably inserted into the reset plate (82). A third spring (85) is fixedly connected to the synchronous rod (84). One end of the third spring (85) is fixedly connected to the reset plate (82), and one end of the synchronous rod (84) penetrates through the reset plate (82) and abuts against the catalytic unit (10).

10. The sootblowing device of an SCR denitration reactor according to claim 9, characterized in that, The ash cleaning device (9) includes a centrifugal air pump (91) fixedly connected to the denitration outer shell (2). The output end of the centrifugal air pump (91) is connected to an air outlet pipe (92) in a penetrating manner. A dust removal pipe (94) is connected to the side end of the air outlet pipe (92) in a penetrating manner. A dust removal groove (95) is formed in the dust removal pipe (94) in a penetrating manner. A connecting plate (93) is connected to the dust removal pipe (94) in a penetrating manner, and the connecting plate (93) is fixedly connected to the denitration outer shell (2).

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