Soot blower of SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The invention discloses a soot blowing device of an SCR (selective catalytic reduction) denitration reactor, which comprises a fixing frame, a denitration shell and a soot blowing shell are fixedly arranged on the fixing frame, the denitration shell is communicated with the soot blowing shell, a catalytic unit for reducing nitrogen oxides in industrial flue gas is slidably inserted into the denitration shell, and the soot blowing shell is communicated with the denitration shell. A supporting piece for supporting the catalytic unit in the soot blowing state is fixedly arranged at the side end of the soot blowing shell, the supporting piece is arranged in the soot blowing shell, and a push-out device for pushing the catalytic unit to move to the supporting piece is arranged on the denitration shell; air can be automatically guided into the next group of air bags through the guide-in device and the switching device, so that the multiple groups of catalytic units can be used in sequence, and the device can still perform denitration operation in the soot blowing process, so that the system can keep high-efficiency operation at any time, and due to the design, the overall efficiency of the system is improved, and the energy consumption of the system is reduced. And the possibility of human errors is reduced through automatic operation, and the reliability and the stability of the system are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of SCR denitration, in particular to a soot blowing device of an SCR denitration reactor. Background Art

[0002] The SCR denitrification reactor is a device used to reduce the emission of nitrogen oxides in industrial flue gas. This technology uses a catalyst to react reducing agents such as ammonia or urea with nitrogen oxides in the flue gas to generate harmless nitrogen and water. The soot blowing device of the SCR denitrification reactor is to keep the catalyst surface clean and active, and prevent the catalyst from being covered by dust, fly ash, ammonium sulfate and other deposits, which will affect the denitrification 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] The Chinese patent with the publication number CN216537817U discloses a high-efficiency sootblowing device for an SCR denitration reactor, which structure includes a reactor body, a catalyst layer arranged inside the reactor body, and a soot discharge pipe arranged on the reactor body. A support plate is vertically arranged inside the reactor, and a mounting plate is vertically arranged on the support plate. A first driven shaft is rotatably connected to the side of the mounting plate, and a mounting block is arranged at one end of the first driven shaft away from the mounting plate. A second driven shaft is horizontally penetrated on the upper part of the mounting block, and the second driven shaft is rotatably connected to the mounting block. A fixing frame is arranged at one end of the second driven shaft away from the mounting block, and a gas disk is horizontally arranged on the fixing frame. The gas disk is provided with a plurality of gas nozzles for sootblowing the catalyst layer. The sootblowing device has the advantage that it is easy to clean the dead corner of the catalyst layer by sootblowing to prevent dust residue.

[0004] However, the above-mentioned prior art has the following shortcomings: when the deposits on the catalyst surface are blown away inside the reactor, the denitrification operation of the reactor needs to be stopped to avoid interference with the system operation and affecting the denitrification efficiency and process safety. However, after the system is shut down, it takes a certain amount of time to resume operation for inspection, preheating and other initialization steps, which may cause startup delays and affect the denitrification efficiency and emission control. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when the deposits on the catalyst surface are blown away inside the reactor, the denitration operation of the reactor needs to be stopped to avoid interference with the system operation and affect the denitration efficiency and process safety. However, after the system is shut down, it takes a certain amount of time to resume operation for inspection, preheating and other initialization steps, which may cause startup delays and affect the denitration efficiency and emission control. A soot blowing device for an SCR denitration reactor is provided.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sootblowing device for an SCR denitration reactor, comprising: a fixed frame, a denitration shell and a sootblowing shell are fixedly arranged on the fixed frame, and the denitration shell and the sootblowing shell are connected, a catalytic unit for reducing nitrogen oxides in industrial flue gas is slidably inserted in the denitration shell, a support member for supporting the catalytic unit in a sootblowing state is fixedly arranged at a side end of the sootblowing shell, and the support member is arranged in the sootblowing shell, a pushing device for pushing the catalytic unit to move to the supporting member is arranged on the denitration shell, an introduction device for introducing air into the pushing device is arranged on the pushing device, and a switching device for switching the introduction position of the introduction device is arranged on the denitration shell;

[0007] The switching device comprises a mounting plate and a mounting block fixedly connected to the denitration housing, a pusher is slidably inserted at the side end of the mounting plate, a spring is sleeved on the pusher, and one end of the spring is fixedly connected to the mounting plate, and the other end is fixedly connected to the pusher, a push rod is slidably inserted on 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 topmost group of pushing devices on the denitrification housing, as the air in the pushing device increases, the catalytic unit is pushed onto the corresponding support member. As the catalytic unit moves, the pull rod is pushed, causing the pull rod to pull the push rod to move, causing the push rod to abut against the pushing member, thereby pushing the pushing member to move, changing the air outlet position of the introduction device, allowing air to enter the next group of pushing devices, and pushing the next group of catalytic units out.

[0009] As a further solution of the present invention: a resetting device is arranged in the sootblowing housing to push the catalytic unit after sootblowing back into the denitration housing.

[0010] As a further solution of the present invention: the denitration housing is provided with a cleaning device for blowing off the sediment on the surface of the catalytic unit when the pushing device pushes the catalytic unit out.

[0011] As a further solution of the present invention: a fixing bar for supporting and fixing the catalytic unit is fixedly connected inside the denitration shell, and a guide groove for guiding the movement of the ejection device in the opposite direction is provided inside the denitration shell.

[0012] As a further solution of the present invention: the support member includes a mounting frame arranged in the sootblowing shell and fixedly connected to the denitrification shell, a support shaft is rotatably connected in the mounting frame, and a limiting plate for limiting the catalytic unit is fixedly connected to the outer side of the support shaft.

[0013] As a further solution of the present invention: the ejection device includes a storage box connected to the denitrification shell, an airbag is movably arranged in the storage box, one end of the airbag is fixedly connected to a guide plate, the guide plate is slidably connected to the guide groove, the other end of the airbag is connected to an inlet pipe, and the inlet pipe passes through the storage box, and a flow groove is opened on the airbag.

[0014] As a further scheme of the present invention: the introduction device includes a fixing plate fixedly connected to the denitrification shell, one end of the fixing plate is fixedly connected to a flow tube, one end of the flow tube is through-connected with an outlet tube, a sealing member 1 is slidably inserted at the top of the flow tube, a sealing member 2 is slidably inserted at one end of the outlet tube, one end of the sealing member 2 is slidably inserted with the introduction tube, one end of the sealing member 1 and the sealing member 2 are fixedly arranged with a pushing member, the bottom end of the flow tube is through-connected with a connecting tube, one end of the connecting tube is through-connected with a vortex air pump, and the vortex air pump is fixedly connected to the denitrification shell.

[0015] As a further solution of the present invention: the first sealing member includes a connecting frame slidably plugged with the flow tube, a partition plate is fixedly connected to the inside of the connecting frame, a connecting hole is penetrated through the partition plate, and the second sealing member is also provided with a connecting frame, a partition plate and a connecting 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 sootblowing shell, one end of the telescopic rod is fixedly connected to a reset plate, a spring 2 is sleeved on the outside of the telescopic rod, one end of the spring 2 abuts against the inner wall of the sootblowing shell, and the other end of the spring 2 abuts against the reset plate, a synchronization rod is slidably inserted on the reset plate, a spring 3 is fixedly connected to the synchronization rod, one end of the spring 3 is fixedly connected to the reset plate, and one end of the synchronization rod passes through the reset plate and abuts against the catalytic unit.

[0017] As a further solution of the present invention: the cleaning device includes a centrifugal air pump fixedly connected to the denitrification housing, the output end of the centrifugal air pump is connected with an air outlet pipe, the side end of the air outlet pipe is connected with a dust removal pipe, a dust removal groove is opened on the dust removal pipe, the dust removal pipe is connected with a connecting plate, and the connecting plate is fixedly connected to the denitrification housing.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention can automatically push the catalytic unit from the denitration housing to the support member through the pushing device. This automated operation reduces the need for manual intervention and improves the efficiency and safety of the system. The operation of pushing the catalytic unit out of the denitration housing avoids the interference of industrial flue gas on the soot blowing operation when soot blowing in the denitration housing, thereby ensuring a more thorough and efficient soot blowing effect. At the same time, the flow grooves on the upper three groups of air bags can allow the industrial flue gas to pass normally, and the bottom group of air bags can block the denitration housing when the corresponding catalytic unit is pushed out when filled with gas to prevent the industrial flue gas from passing through. This design does not affect the normal denitration work and can effectively isolate the soot blowing process;

[0020] 2. In the present invention, the air can be automatically introduced into the next group of air bags through the introduction device and the switching device, so that multiple groups of catalytic units can 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 efficient 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, and enhances the reliability and stability of the system. At the same time, by accurately controlling the position and time of air introduction, it is ensured that each group of catalytic units can work under optimal conditions, further improving the effect of the denitration reaction;

[0021] 3. The reset device in the present invention can enable the four groups of catalytic units to return to the denitrification housing synchronously and smoothly after completing the soot blowing operation, so that the entire device can be quickly restored to its initial state, reducing the need for manual intervention and improving operational efficiency and safety. The automatic reset process ensures that the catalytic units can be accurately reset in a preset order and time, avoiding errors and safety hazards that may be caused by human operation. The automation characteristics of the reset device also reduce the labor intensity of operators, further improving the overall reliability and operational stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a sootblowing device of an SCR denitration reactor according to the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of a denitration housing in a denitration state in a soot blowing device of an SCR denitration reactor according to the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of a denitration housing in a soot blowing state in a soot blowing device of an SCR denitration reactor according to the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of a denitration housing in a reset state in a soot blowing device of an SCR denitration reactor according to the present invention;

[0026] Figure 5 It is a partial structural cross-sectional view of a denitration housing in a sootblowing device of an SCR denitration reactor according to the present invention;

[0027] Figure 6 It is a structural schematic diagram of a push-out device in a soot-blowing device of an SCR denitration reactor according to the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of an air bag in a soot blowing device of an SCR denitration reactor according to the present invention;

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

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

[0031] Fig.10 It is a structural schematic diagram of a plugging component 1 in a soot blowing device of an SCR denitration reactor according to the present invention;

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

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

[0034] In the figure: 1, fixing frame; 2, denitration shell; 21, fixing strip; 22, guide groove; 3, soot blowing shell; 4, support member; 41, mounting frame; 42, support shaft; 43, limit plate; 5, ejection device; 51, receiving box; 52, air bag; 53, guide plate; 54, introduction pipe; 55, flow groove; 6, introduction device; 61, fixing plate; 62, flow pipe; 63, outlet pipe; 64, plugging member 1; 641, connection frame; 642, partition plate; 643, connecting hole ; 65. Sealing part 2; 66. Connecting pipe; 67. Vortex air pump; 7. Switching device; 71. Mounting plate; 72. Pushing member; 73. Spring 1; 74. Mounting block; 75. Push rod; 76. Pull rod; 8. Reset device; 81. Telescopic rod; 82. Reset plate; 83. Spring 2; 84. Synchronizing rod; 85. Spring 3; 9. Cleaning device; 91. Centrifugal air pump; 92. Exhaust pipe; 93. Connecting plate; 94. Dust removal pipe; 95. Dust removal trough; 10. Catalytic unit. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "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", and "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, or it can be the internal connection 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 circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0037] Reference Figures 1 to 4In an embodiment of the present invention, a sootblowing device for an SCR denitration reactor comprises: a fixed frame 1, a denitration shell 2 and a sootblowing shell 3 are fixedly arranged on the fixed frame 1, and the denitration shell 2 and the sootblowing shell 3 are connected, a catalytic unit 10 for reducing nitrogen oxides in industrial flue gas is slidably inserted in the denitration shell 2, and the catalytic unit 10 is provided with four groups evenly distributed in the denitration shell 2, and a support member 4 for supporting the catalytic unit 10 in a sootblowing state is fixedly arranged at the side end of the sootblowing shell 3, and the support member 4 is provided with four groups, which are evenly distributed at the side end of the sootblowing shell 3, and the support member 4 is arranged in the sootblowing shell 3, and the denitration shell 2 is provided with a catalyst for promoting the catalyst The unit 10 is moved to the push-out device 5 of the support 4. There are four groups of push-out devices 5, which are evenly distributed on the side ends of the sootblowing shell 3. The push-out device 5 is provided with an introduction device 6 for introducing air into the push-out device 5. The denitrification shell 2 is provided with a switching device 7 for switching the introduction position of the introduction device 6. There are three groups of switching devices 7, which are evenly distributed on the side ends of the denitrification shell 2. A reset device 8 for pushing the catalytic unit 10 after sootblowing back into the denitrification shell 2 is provided in the sootblowing shell 3. A cleaning device 9 is provided on the denitrification shell 2 for blowing off the sediment on the surface of the catalytic unit 10 when the push-out device 5 pushes the catalytic unit 10 out;

[0038] The switching device 7 includes a mounting plate 71 and a mounting block 74 fixedly connected to the denitration housing 2, and the mounting plate 71 and the mounting block 74 are respectively arranged on the two sides of the side ends of the denitration housing 2, and the side end of the mounting plate 71 is slidably plugged with a pusher 72, and the pusher 72 is T-shaped and consists of a group of straight plates and a group of straight rods. A spring 73 is sleeved on the pusher 72, and one end of the spring 73 is fixedly connected to the mounting plate 71, and the other end is fixedly connected to the straight plate in the pusher 72. The mounting block A push rod 75 is slidably inserted on 74. The push rod 75 is L-shaped and consists of two groups of straight rods, one of which penetrates the mounting block 74 and is slidably inserted with the mounting block 74, and the contact surface between the other group of straight rods in the push rod 75 and the straight rods in the push 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 groups of straight rods, one of which penetrates the push rod 75 and is rotatably connected with the push rod 75, and the other group of straight rods abuts against the support member 4;

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

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

[0041] Reference Figure 5 , a fixing bar 21 for supporting and fixing the catalytic unit 10 is fixedly connected inside the denitration shell 2, and sixteen groups of fixing bars 21 are arranged, which are symmetrically distributed at the upper and lower ends of the four groups of catalytic units 10; a guide groove 22 for guiding the movement of the ejection device 5 in the opposite direction is opened inside the denitration shell 2, and eight groups of guide grooves 22 are arranged, which are symmetrically opened on the inner wall of the denitration shell 2; the support member 4 includes a mounting frame 41 which is arranged in the sootblowing shell 3 and fixedly connected to the denitration shell 2; a support shaft 42 is rotatably connected in the mounting frame 41, and a plurality of support shafts 42 are arranged, which are evenly distributed in 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, and two groups of limiting plates 43 are arranged on the outside of each group of support shafts 42, and the spacing between the two groups of limiting plates 43 is the same as the width of the catalytic unit 10; due to the inclined shape of the fixing bar 21, the guide groove 22 and the support member 4, and the gravity of the catalytic unit 10, when a part of the catalytic unit 10 is pushed out, it will move on the support member 4 by itself.

[0042] The above scheme is adopted: by designing the fixing bar 21 and the guide groove 22 to be inclined, the catalyst unit 10 can be naturally pushed out of the denitrification housing 2 one by one by utilizing the deadweight of the catalyst unit 10 and the guiding effect of the inclined surface. This design reduces the need for external driving force and makes the pushing process of the catalyst unit 10 smoother and more automated.

[0043] Reference Figure 6 to Figure 7 The ejection device 5 includes a receiving box 51 connected to the denitrification shell 2, and an airbag 52 is movably arranged in the receiving box 51. A guide plate 53 is fixedly connected to one end of the airbag 52, and the guide plate 53 is slidably connected to the guide groove 22. An introduction pipe 54 is connected to the other end of the airbag 52, and the introduction pipe 54 passes through the receiving box 51. Four groups of airbags 52 are evenly distributed from top to bottom in the denitrification shell 2, and the upper three groups of airbags 52 are provided with flow grooves 55. The flow grooves 55 are rectangular and triangular so that industrial flue gas can pass through them. The airbags 52 are rectangular, and the length and width of the airbags 52 when unfolded are greater than the length and frame of the denitrification shell 2, so that the bottom group of airbags 52 is filled with gas in the denitrification shell 2, and when the corresponding group of catalytic units 10 is pushed out, this group of airbags 52 can be blocked in the denitrification shell 2 to prevent industrial flue gas from passing through.

[0044] By adopting the above scheme, the catalyst unit 10 can be automatically pushed out of the denitrification housing 2 onto the support 4 through the pushing device 5, reducing the need for manual intervention. This automated operation improves the efficiency and safety of the system, especially when the catalyst unit 10 needs to be replaced frequently. The pushing device 5 is provided with four groups, which are evenly distributed on the side ends of the sootblowing housing 3 to ensure that each group of catalyst 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] Reference Figures 8 to 10 The introduction device 6 includes a fixed plate 61 fixedly connected to the denitration housing 2, the fixed plate 61 is L-shaped, one end of the fixed plate 61 is fixedly connected to a flow tube 62, one end of the flow tube 62 is connected to a lead-out tube 63, a plugging piece 1 64 is slidably plugged at the top of the flow tube 62, a plugging piece 2 65 is slidably plugged at one end of the lead-out tube 63, one end of the plugging piece 2 65 is slidably plugged with the introduction tube 54, one end of the plugging piece 1 64 and the plugging piece 2 65 are fixedly arranged with the push piece 72, and four parts are arranged in the introduction device 6. The fixing plate 61, the flow tube 62, the outlet tube 63 and the plugging piece 2 65 are arranged in three groups, and the plugging piece 1 64 is provided with three groups, and the four groups of flow tubes 62 are connected together by the three groups of plugging pieces 1 64, wherein the top of the group of flow tubes 62 at the top is sealed, and the bottom of the group of flow tubes 62 at the bottom is connected with the connecting pipe 66, and one end of the connecting pipe 66 is connected with the vortex air pump 67, and the vortex air pump 67 is fixedly connected to the denitration housing 2, and the plugging piece 1 64 includes a connecting frame that is slidably plugged with the flow tube 62 641, a partition plate 642 is fixedly connected to the interior of the connection frame 641, and a connecting hole 643 is formed on the partition plate 642. The blocking member 65 is also provided with a connection frame 641, a partition plate 642 and a connecting hole 643. When a group of catalytic units 10 is completely moved out, the catalytic units 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 push member 72, so that the spring 1 73 is stretched and pushes the push member 72 to move. The push member 72 moves, 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 connecting hole 643 of the first blocking member 64 moves out of the corresponding position of the two groups of flow tubes 62, so that the partition plate 642 is inserted between the two groups of flow tubes 62 to separate them, and the connecting 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 connected, bringing 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 Fig.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] Reference Fig.12 The cleaning device 9 includes a centrifugal air pump 91 fixedly connected to the denitrification housing 2, the output end of the centrifugal air pump 91 is connected with an air outlet pipe 92, the side end of the air outlet pipe 92 is connected with a dust removal pipe 94, four groups of dust removal pipes 94 are arranged, evenly distributed above each group of catalytic units 10, each group of dust removal pipes 94 is provided with a group of dust removal grooves 95, each group of dust removal pipes 94 is connected with two groups of connecting plates 93, the two groups of connecting plates 93 are symmetrically distributed on both sides of the denitrification housing 2, and are fixedly connected to the denitrification housing 2.

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

[0052] The above solution is adopted: the high-pressure airflow generated by the centrifugal air pump 91 is used to discharge the air from the outlet pipe 92 through the dust removal groove 95 on the dust removal pipe 94 and blow it directly 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: 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 connecting holes 643 in the three groups of sealing parts 1 64, so that the four groups of flow tubes 62 are connected, and the connecting holes 643 in the topmost group of sealing parts 2 65 correspond to the topmost inlet tube 54 and outlet tube 63 respectively, so that the inlet tube 54 of this group is connected with the outlet tube 63, and the 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 denitrification housing 2 to the support shaft 42 along the direction of the guide groove 22. At the same time as the catalytic unit 10 is pushed out, start the centrifugal air pump 91 to allow air to pass through the outlet pipe The air enters the catalyst unit 10 from the dust removal slot 92 and is discharged from the dust removal slot 95, and the air is pressurized and blown onto the catalyst unit 10 to blow off the deposits on the catalyst unit 10. When the catalyst unit 10 is pushed out, the catalyst unit 10 abuts against the synchronization rod 84. Since the telescopic rod 81 is arranged below the reset plate 82, the telescopic rod 81 cannot be subjected to the maximum force, causing the synchronization rod 84 to move outward and stretching the spring three 85 until the distance between the two synchronization rods 84 is greater than the width of the catalyst unit 10, so that the catalyst unit 10 passes through. Since the fixing strip 21, the guide slot 22 and the support member 4 are inclined, and the gravity of the catalyst unit 10, when the catalyst unit 10 is partially pushed out, it will move on the support member 4 by itself. When the catalyst unit 10 is completely moved out, the air bag 52 is not filled with gas at this time, and the catalyst unit 10 is not fully moved out. 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 push member 72, so that the spring 1 73 stretches and pushes the push member 72 to move, thereby driving the first blocking member 1 64 and the second blocking member 2 65 fixedly connected to the push member 72 to move, so that the connecting hole 643 of the first blocking member 1 64 moves out of the corresponding position of the two groups of flow tubes 62, so that the partition plate 642 is inserted between the two groups of flow tubes 62 to separate them, and the connecting hole 643 in the second blocking member 2 65 is inserted between the second outlet pipe 63 and the second inlet pipe 54, so that the second outlet pipe 63 and the second inlet pipe 54 are connected, and air is brought into the second airbag 52, so that the second catalytic unit 10 is moved out of the denitration. Shell 2, as the operation proceeds, 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 2 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 airbag 52 without the flow slot 55 at the bottom is unfolded. At this time, this group of airbags 52 is filled with gas, which isolates the interior of the denitrification shell 2 to prevent industrial smoke from passing through. 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 3 85, the synchronization rod 84 is reset, so that the distance 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.The gas in the lowermost airbag 52 is reduced. At this time, the force on the second spring 83 is reduced, pushing the reset plate 82 to reset, and under the action of the synchronization rod 84, all the catalytic units 10 are reset synchronously. At this time, since the airbag 52 with the flow slot 55 is not filled with gas, all the catalytic units 10 can move synchronously for a certain distance. After losing the contact with the catalytic unit 10, the switching device 7 will also reset to a certain extent, so that the blocking member 1 64 and the blocking member 2 65 move to the middle position. In this state, a part of the connecting holes 643 in all the blocking members 1 64 and the blocking member 2 65 is located between the two groups of flow pipes 62 and between the outlet pipe 63 and the inlet pipe 54, so that all the airbags 5 2 is in a connected state, at which time the vortex air pump 67 starts at maximum power to extract all the gases in all the air bags 52, and then the reset device 8 pushes all the catalytic units 10 to reset, so that the device returns to the initial state; the catalytic unit 10 can be automatically pushed out of the denitration housing 2 to the support 4 through the pushing device 5. This automated operation reduces the need for manual intervention and improves the efficiency and safety of the system. The operation of pushing the catalytic unit 10 out of the denitration housing 2 avoids the interference of industrial flue gas on the soot blowing operation when soot is blown in the denitration housing 2, thereby ensuring that the soot blowing effect is more thorough and efficient. At the same time, the flow slots 55 on the upper three groups of air bags 52 can allow the industrial flue gas to pass normally, while the lowest When a group of air bags 52 on the opposite side is filled with air and the corresponding catalytic unit 10 is pushed out, it can be blocked in the denitration housing 2 to prevent industrial smoke from passing through. This design does not affect the normal denitration work, and can effectively isolate it during the soot blowing process. The air can be automatically introduced into the next group of air bags 52 through the introduction device 6 and the switching device 7, so that multiple groups of catalytic units 10 can be used in turn, ensuring that the device can still perform denitration operations during the soot blowing process, thereby ensuring that the system can maintain efficient 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, enhances the reliability and stability of the system, and at the same time, through precise control The position and time of air introduction ensure that each group of catalytic units 10 can work under optimal conditions, further improving the effect of the denitration reaction. The reset device 8 can make the four groups of catalytic units 10 return to the denitration housing 2 synchronously and smoothly after completing the soot blowing operation, so that the entire device can be quickly restored to the initial state, reducing the need for manual intervention and improving operational efficiency and safety. The automatic reset process ensures that the catalytic units 10 can be accurately reset in the preset sequence and time, avoiding errors and safety hazards that may be caused by manual operation. The automation characteristics of the reset device 8 also reduce the labor intensity of operators, further improving the overall reliability and operational stability of the system.

[0054] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sootblowing device for an SCR denitration reactor, comprising: A fixed frame (1), on which a denitration housing (2) and a sootblowing housing (3) are fixedly arranged, and the denitration housing (2) and the sootblowing housing (3) are connected, characterized in that a catalytic unit (10) for reducing nitrogen oxides in industrial flue gas is slidably inserted in the denitration housing (2), a support member (4) for supporting the catalytic unit (10) in a sootblowing state is fixedly arranged at a side end of the sootblowing housing (3), and the support member (4) is arranged in the sootblowing housing (3), the denitration housing (2) is provided with an ejection device (5) for pushing the catalytic unit (10) to move to the support member (4), the ejection device (5) is provided with an introduction device (6) for introducing air into the ejection device (5), and the denitration housing (2) is provided with a switching device (7) for switching the introduction position of the introduction device (6); The switching device (7) comprises a mounting plate (71) and a mounting block (74) fixedly connected to the denitration housing (2); a pusher (72) is slidably inserted into the side end of the mounting plate (71); a spring (73) is sleeved on the pusher (72); one end of the spring (73) is fixedly connected to the mounting plate (71), and the other end is fixedly connected to the pusher (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) is in contact with the support member (4); When the introduction device (6) introduces air into the topmost group of ejection devices (5) on the denitrification housing (2), as the amount of 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, the pull rod (76) is pushed, causing the pull rod (76) to pull the push rod (75) to move, causing the push rod (75) to abut against the push member (72), thereby pushing the push member (72) to move, changing the air outlet position of the introduction device (6), allowing air to enter the next group of ejection devices (5), and ejecting the next group of catalytic units (10).

2. A sootblowing device for an SCR denitration reactor according to claim 1, characterized in that: The sootblowing housing (3) is provided with a resetting device (8) for pushing the catalytic unit (10) after sootblowing back into the denitration housing (2).

3. The sootblowing device of the SCR denitration reactor according to claim 2, characterized in that: The denitration housing (2) is provided with a cleaning device (9) for blowing away the sediment on the surface of the catalytic unit (10) when the catalytic unit (10) is pushed out by the pushing device (5).

4. A sootblowing device for an SCR denitration reactor according to claim 3, characterized in that: A fixing bar (21) for supporting and fixing the catalytic unit (10) is fixedly connected to the interior of the denitration housing (2), and a guide groove (22) for guiding the movement of the ejection device (5) in the opposite direction is provided inside the denitration housing (2).

5. The sootblowing device of the SCR denitration reactor according to claim 4, characterized in that: The support member (4) comprises a mounting frame (41) which is arranged in the sootblowing housing (3) and fixedly connected to the denitration housing (2); a support shaft (42) is rotatably connected in the mounting frame (41); and a limiting plate (43) for limiting the catalytic unit (10) is fixedly connected to the outer side of the support shaft (42).

6. A sootblowing device for an SCR denitration reactor according to claim 5, characterized in that: The ejection device (5) comprises a storage box (51) connected to the denitration housing (2), an air bag (52) is movably arranged in the storage box (51), one end of the air bag (52) is fixedly connected to a guide plate (53), the guide plate (53) is slidably connected to the guide groove (22), the other end of the air bag (52) is connected to an introduction pipe (54), and the introduction pipe (54) passes through the storage box (51), and a flow groove (55) is opened on the air bag (52).

7. A sootblowing device for an SCR denitration reactor according to claim 6, characterized in that: The introduction device (6) comprises a fixed plate (61) fixedly connected to the denitration housing (2); one end of the fixed plate (61) is fixedly connected to a flow tube (62); one end of the flow tube (62) is connected to an outlet tube (63); a plugging member 1 (64) is slidably inserted at the top of the flow tube (62); a plugging member 2 (65) is slidably inserted at one end of the outlet tube (63); one end of the plugging member 2 (65) is slidably inserted with the introduction tube (54); one end of the plugging member 1 (64) and the plugging member 2 (65) are fixedly arranged with a pushing member (72); the bottom end of the flow tube (62) is connected to a connecting tube (66); one end of the connecting tube (66) is connected to a vortex air pump (67); the vortex air pump (67) is fixedly connected to the denitration housing (2).

8. The sootblowing device of the SCR denitration reactor according to claim 7, characterized in that: The first sealing member (64) comprises a connection frame (641) slidably plugged with the flow tube (62), a partition plate (642) being fixedly connected inside the connection frame (641), and a connecting hole (643) is formed through the partition plate (642). The second sealing member (65) is also provided with a connection frame (641), a partition plate (642) and a connecting hole (643).

9. A sootblowing device for an SCR denitration reactor according to claim 8, characterized in that: The reset device (8) comprises a telescopic rod (81) fixedly connected to the inner wall of the sootblowing shell (3), one end of the telescopic rod (81) is fixedly connected to a reset plate (82), a second spring (83) is sleeved on the outer side of the telescopic rod (81), one end of the second spring (83) abuts against the inner wall of the sootblowing shell (3), and the other end of the second spring (83) abuts against the reset plate (82), a synchronization rod (84) is slidably inserted on the reset plate (82), a third spring (85) is fixedly connected to the synchronization rod (84), one end of the third spring (85) is fixedly connected to the reset plate (82), and one end of the synchronization rod (84) passes through the reset plate (82) and abuts against the catalytic unit (10).

10. A sootblowing device for an SCR denitration reactor according to claim 9, characterized in that: The dust cleaning device (9) comprises a centrifugal air pump (91) fixedly connected to the denitration housing (2); the output end of the centrifugal air pump (91) is connected to an air outlet pipe (92); the side end of the air outlet pipe (92) is connected to a dust removal pipe (94); a dust removal groove (95) is provided on the dust removal pipe (94); the dust removal pipe (94) is connected to a connecting plate (93); and the connecting plate (93) is fixedly connected to the denitration housing (2).

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