Ash removal device for SCR (Selective Catalytic Reduction) denitration reactor
By designing a dust removal device for the SCR denitrification reactor, and utilizing a combination of suction pumps and brushes for dust removal, the problem of pore blockage caused by catalyst ash accumulation was solved, achieving efficient dust removal, extending catalyst life, reducing operating costs, and ensuring stable operation of the unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-03
AI Technical Summary
Under high dust conditions, high concentrations of dust easily adhere to the surface of SCR denitrification catalysts, leading to pore blockage, reduced denitrification efficiency, shortened catalyst life, and increased operating costs. Existing dust removal devices require disassembly, affecting production.
A dust removal device for an SCR denitrification reactor is designed. A suction pump generates suction to blow the catalyst through the ash inlet pipe, connecting pipe and the ash outlet of the annular pipe. Combined with a driver, a brush is driven to clean the catalyst surface, achieving efficient dust removal without disassembling the equipment.
It effectively removes dust accumulation on the catalyst surface, prevents pore blockage, maintains high denitrification efficiency, extends catalyst life, reduces operating costs, and ensures stable operation of the unit.
Smart Images
Figure CN223960233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental protection equipment technology, and in particular to a dust removal device for an SCR denitrification reactor. Background Technology
[0002] With increasingly stringent environmental protection requirements, the trend towards ultra-low emissions is inevitable across all industries. Among numerous denitrification processes, SCR denitrification technology is widely used in industries such as cement and power due to its high denitrification efficiency and stable system performance. However, it is undeniable that in high-dust environments like the cement industry, high concentrations of dust gradually adhere to the surface of the SCR denitrification catalyst, causing pore blockage. Once the catalyst is blocked, the active sites are obscured, making it difficult for reactant gases to diffuse into the catalyst interior, resulting in a significant reduction in denitrification efficiency. Long-term dust accumulation can also lead to catalyst poisoning, shortening catalyst lifespan and increasing operating costs. Furthermore, existing dust removal devices have significant shortcomings. Some devices require disassembly for dust removal, a process that consumes a lot of manpower, takes a long time, and seriously affects the continuous operation of the device, making it difficult to meet production needs. Utility Model Content
[0003] The main purpose of this invention is to provide a dust removal device for an SCR denitrification reactor, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A soot removal device for an SCR denitrification reactor includes a reactor shell. A control keyboard is fixedly connected to the lower left end of the reactor shell. A viewing window is fixedly installed in the middle of the front end of the reactor shell. A soot blowing structure is fixedly connected to the middle left end of the reactor shell. The right part of the soot blowing structure is located inside the reactor shell. A catalyst cleaning device is fixedly connected to the middle upper end of the reactor shell. The lower part of the catalyst cleaning device is located inside the reactor shell and is movably inserted into the soot blowing structure. A through slot is opened in the middle lower end of the reactor shell. An annular ash receiving box is movably inserted into the slot. A through opening is opened in the middle lower end of the annular ash receiving box. An annular ash receiving groove is opened at the upper end of the annular ash receiving box. Reinforcing legs are fixedly connected to the four corners of the lower end of the reactor shell.
[0006] Preferably, the soot blowing structure includes a suction pump, which is fixedly connected to the middle of the left end of the reactor shell. An ash inlet pipe is fixedly connected to the right end of the suction pump, and a connecting pipe is fixedly connected to the output end of the suction pump. The connecting pipe extends to the left side of the reactor shell and is fixedly connected to a rectangular tube. Five annular tubes are fixedly connected at equal intervals from top to bottom on the left end of the rectangular tube, and several ash outlets are fixedly connected to the inner walls of the five annular tubes.
[0007] By adopting the above technical solution: the suction pump generates suction, sucks in the dust through the ash inlet pipe, and then transports it to the rectangular pipe through the connecting pipe. The rectangular pipe is connected to multiple annular pipes, and the ash outlet nozzles on the annular pipes can blow out the dust evenly, purging and cleaning the catalyst in the reactor, making the cleaning range wider and more uniform, effectively improving the cleaning efficiency, and ensuring the stable operation of the SCR denitrification reactor.
[0008] Preferably, the ash outlets are arranged in a ring array.
[0009] By adopting the above technical solution: the suction pump generates suction to draw in the ash, which is then transported through the pipeline. The ash is blown out from the ash outlets arranged in a ring array on the annular pipe, which evenly sweeps the ash, improves the ash removal effect, and ensures the normal operation of the reactor.
[0010] Preferably, the catalyst cleaning device includes a perforated base plate and a driver. The outer surface of the perforated base plate is fixedly connected to the lower part of the inner wall of the reactor shell. A fine filter screen and a catalyst body are fixedly connected sequentially from the outside to the inside at the upper end of the perforated base plate. The outer surface of the catalyst body has several through-holes arranged in a ring array. An exhaust pipe is fixedly connected to the lower middle part of the catalyst body and the perforated base plate. The upper part of the exhaust pipe extends into the catalyst body. A cleaning chamber is formed between the catalyst body and the fine filter screen. The driver is fixedly connected to the upper end of the reactor shell. The output end of the driver passes through the upper middle part of the reactor shell and is fixedly connected to a fixing rod. A brush frame is fixedly connected to the lower end of the fixing rod. An inner brush is fixedly connected to the end of the brush frame near the fine filter screen. Two brushes are fixedly connected to the left and right parts of the inner upper wall of the brush frame.
[0011] By adopting the above technical solution: the driver drives the fixed rod and brush frame to move, the inner brush and the two brushes clean the fine filter screen and the catalyst body, the dust falls into the cleaning chamber, and falls into the annular dust collection groove on the annular dust collection box through the hollow base plate. The ventilation hole ensures gas flow, and the whole process achieves effective cleaning of the catalyst and maintains its activity.
[0012] Preferably, several of the vent holes communicate with the interior of the vent pipe, the lower part of the vent pipe passes through the opening and is located on the lower outer side of the reactor shell, the two inner brushes are in close contact with but not fixed to the outer surface of the fine filter screen, the two double-sided brushes are located in the cleaning chamber and are in close contact with but not fixed to the inner wall of the fine filter screen and the outer surface of the catalyst body, respectively, and the upper inner wall of the brush frame is in close contact with but not fixed to the upper end face of the fine filter screen and the catalyst body.
[0013] By adopting the above technical solution: the vent is connected to the gas outlet pipe, which allows the gas after the reaction to be discharged smoothly. The brush is in close contact with the fine filter screen and the catalyst body but not fixed, which can effectively clean the dust without damaging them. The brush frame is in close contact with the upper surface of the two, which ensures full coverage during cleaning, making the dust removal more thorough and maintaining the normal operation of the device.
[0014] Preferably, the fine filter screen and the catalyst body are located together within the five annular tubes, the brush frame does not contact the several ash outlets, the hollow base plate is located directly above the annular ash receiving box, and the hollow base plate communicates with the annular ash receiving groove.
[0015] By adopting the above technical solution: the fine filter screen and catalyst body are located inside the annular tube, and can be evenly blown by the ash outlet nozzle. The brush frame does not contact the ash outlet nozzle to avoid interference. The hollow base plate is placed above the annular ash receiving box and is connected to it, so that the swept dust can fall smoothly into the ash receiving trough, effectively cleaning the dust and ensuring the stable operation of the device.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. In this utility model, a suction pump generates suction to draw dust into the ash inlet pipe, which is then transported to a rectangular pipe via a connecting pipe. The rectangular pipe is connected to multiple annular pipes, and the annular pipes have ash outlet nozzles arranged in a ring array. This design allows the dust to be blown out at multiple angles and in a uniform manner, thereby fully covering the catalyst surface, effectively removing the attached high-concentration dust, preventing catalyst pore blockage, ensuring normal diffusion of reactant gases, and maintaining high denitrification efficiency. On the other hand, it avoids catalyst poisoning caused by ash accumulation, extends the catalyst's service life, and reduces operating costs. In addition, the structure is reasonably designed and can operate continuously and stably, ensuring the normal operation of the entire denitrification system.
[0018] 2. In this utility model, the driver drives the brush frame to move, and the inner brush and the two brushes can respectively clean the inner and outer surfaces of the fine filter screen and the outer surface of the catalyst body, effectively removing the attached dust. The cleaning chamber provides a temporary storage space for the dust, making it easy for the dust to fall smoothly into the annular dust collection box. The fine filter screen can pre-filter some of the dust, reducing the burden on the catalyst body. The vent holes on the catalyst body are connected to the gas outlet pipe to ensure that the reaction gas is discharged smoothly and maintain the normal reaction. Overall, this device avoids the catalyst from being blocked by dust, improves the denitrification efficiency, extends the service life of the catalyst, and the dust removal process does not require disassembling the equipment, saving manpower and time, and does not affect the continuous operation of the device, thus meeting production needs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of an SCR denitrification reactor cleaning device according to the present invention;
[0020] Figure 2 This is a schematic diagram of the connection structure between the reactor shell, reinforcing legs, and annular ash collection box of an SCR denitrification reactor ash removal device according to this utility model;
[0021] Figure 3 This is a schematic diagram of the overall soot blowing structure of the soot cleaning device for an SCR denitrification reactor according to this utility model;
[0022] Figure 4 This is a schematic diagram of the overall structure of the catalyst cleaning device of the SCR denitrification reactor ash removal device of this utility model;
[0023] Figure 5 This is a schematic diagram of the overall structure of the catalyst body in the SCR denitrification reactor ash removal device of this utility model.
[0024] In the diagram: 1. Reactor shell; 2. Control keyboard; 3. Viewing window; 4. Soot blowing structure; 5. Catalyst cleaning device; 6. Slot; 7. Annular ash receiving box; 8. Reinforcing leg; 9. Through-hole; 10. Annular ash receiving trough; 41. Suction pump; 42. Ash inlet pipe; 43. Connecting pipe; 44. Rectangular tube; 45. Annular tube; 46. Ash outlet nozzle; 51. Hollowed-out base plate; 52. Fine ash filter screen; 53. Catalyst body; 54. Vent hole; 55. Gas outlet pipe; 56. Cleaning chamber; 57. Driver; 58. Fixing rod; 59. Brush frame; 591. Inner brush; 592. Double-sided brush. Detailed Implementation
[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] Please see Figure 1-4 This utility model provides a technical solution:
[0029] A soot removal device for an SCR denitrification reactor includes a reactor shell 1. A control keyboard 2 is fixedly connected to the lower left end of the reactor shell 1. A viewing window 3 is fixedly installed in the middle of the front end of the reactor shell 1. A soot blowing structure 4 is fixedly connected to the middle left end of the reactor shell 1. The right part of the soot blowing structure 4 is located inside the reactor shell 1. A catalyst cleaning device 5 is fixedly connected to the middle upper end of the reactor shell 1. The lower part of the catalyst cleaning device 5 is located inside the reactor shell 1 and is movably inserted into the soot blowing structure 4. A through slot 6 is opened in the middle lower end of the reactor shell 1. An annular ash receiving box 7 is movably inserted into the slot 6. A through opening 9 is opened in the middle lower end of the annular ash receiving box 7. An annular ash receiving groove 10 is opened in the upper end of the annular ash receiving box 7. Reinforcing legs 8 are fixedly connected to the four corners of the lower end of the reactor shell 1.
[0030] In this embodiment, the soot blowing structure 4 includes a suction pump 41, which is fixedly connected to the middle of the left end of the reactor shell 1. The right end of the suction pump 41 is fixedly connected to an ash inlet pipe 42, and the output end of the suction pump 41 is fixedly connected to a connecting pipe 43. The connecting pipe 43 extends to the left side of the reactor shell 1 and is fixedly connected to a rectangular pipe 44. Five annular pipes 45 are fixedly connected at equal intervals from top to bottom on the left end of the rectangular pipe 44. Several ash outlet nozzles 46 are fixedly connected to the inner walls of the five annular pipes 45, and the several ash outlet nozzles 46 are arranged in a ring array.
[0031] The above scheme works as follows: During operation, the suction pump 41 starts and sucks in dust and other impurities through the ash inlet pipe 42. The dust is then transported by the suction pump 41 to the connecting pipe 43 and then into the rectangular pipe 44. The rectangular pipe 44 is connected to five annular pipes 45. The ash outlets 46 on the inner wall of the annular pipes 45 are arranged in a ring array. The ash outlets 46 blow the dust towards the catalyst body 53 in a uniform and multi-angle manner. This design can comprehensively and efficiently clean the surface of the catalyst body 53, prevent high-concentration dust from adhering and clogging the catalyst pores, avoid the active sites from being blocked, ensure that the reaction gas can diffuse normally into the interior of the catalyst, improve the denitrification efficiency, reduce the risk of catalyst poisoning, extend the service life of the catalyst, and reduce operating costs.
[0032] In this embodiment, the catalyst cleaning device 5 includes a perforated base plate 51 and a driver 57. The outer surface of the perforated base plate 51 is fixedly connected to the lower part of the inner wall of the reactor shell 1. A fine filter screen 52 and a catalyst body 53 are fixedly connected sequentially from the outside to the inside at the upper end of the perforated base plate 51. Several through-holes 54 are arranged in a ring array on the outer surface of the catalyst body 53. An exhaust pipe 55 is inserted and fixedly connected to the lower middle part of the catalyst body 53 and the perforated base plate 51. The upper part of the exhaust pipe 55 extends into the catalyst body 53. A cleaning chamber 56 is formed between the catalyst body 53 and the fine filter screen 52. The driver 57 is fixedly connected to the upper end of the reactor shell 1. The output end of the driver 57 passes through the upper middle part of the reactor shell 1 and is fixedly connected to a fixing rod 58. A brush frame 59 is fixedly connected to the lower end of the fixing rod 58. The brush frame 59 is fixedly connected to the end near the fine filter screen 52. There is an inner brush 591. The upper left and upper right sides of the inner wall of the brush frame 59 are fixedly connected to two brushes 592. Several vent holes 54 are connected to the interior of the vent pipe 55. The lower part of the vent pipe 55 passes through the through hole 9 and is located on the lower outer side of the reactor shell 1. The two inner brushes 591 are in close contact with the outer surface of the fine filter ash screen 52 but not fixed. The two brushes 592 are located in the cleaning chamber 56 and are in close contact with the inner wall of the fine filter ash screen 52 and the outer surface of the catalyst body 53 respectively but not fixed. The upper inner wall of the brush frame 59 is in close contact with the upper end face of the fine filter ash screen 52 and the catalyst body 53 but not fixed. The fine filter ash screen 52 and the catalyst body 53 are located in the middle of the five annular tubes 45. The brush frame 59 does not contact the several ash outlets 46. The hollow base plate seat 51 is located directly above the annular ash receiving box 7 and is connected to the annular ash receiving groove 10.
[0033] With the above solution: during operation, the driver 57 drives the fixed rod 58 and brush frame 59 to move. The inner brush 591 cleans the outer surface of the fine filter screen 52, and the two brushes 592 clean the inner wall of the fine filter screen 52 and the outer surface of the catalyst body 53. Since the brush frame 59 does not contact the ash outlet 46, the entire cleaning process does not require disassembly of the equipment. The cleaned dust falls into the cleaning chamber 56 and then into the annular ash collection groove 10 on the annular ash collection box 7 through the hollow base plate seat 51. The vent 54 is connected to the vent pipe 55 to ensure gas flow. This greatly saves manpower, shortens the cleaning time, does not affect the continuous operation of the device, and meets production needs.
[0034] It should be noted that this utility model is a dust removal device for an SCR denitrification reactor. During use, firstly, the viewing window 3 allows personnel to easily observe the internal dust removal process, while the four reinforcing legs 8 ensure the stability of the device. Next, the user starts the dust removal device via the control keyboard 2. In the dust blowing structure 4, the suction pump 41 operates, drawing in a mixture of air and dust through the ash inlet pipe 42. The mixture enters the rectangular pipe 44 through the connecting pipe 43, and is then blown by the ash outlets 46 arranged in a ring array on the inner wall of the annular pipe 45 onto the fine filter screen 52 and catalyst body 53 located inside the annular pipe 45, performing preliminary cleaning of their surfaces. Simultaneously, the driver 57 of the catalyst cleaning device 5 drives the fixed rod 58 and brush frame 59 to move. The inner brush 591 cleans the outer surface of the fine filter screen 52, while the two brushes 592 on both sides clean the inner wall of the fine filter screen 52 and the outer surface of the catalyst body 53, removing the attached dust. The cleaned dust falls into the cleaning chamber 56 and then into the annular ash collection groove 10 of the annular ash collection box 7 through the hollow base plate seat 51. The gas after the reaction is discharged from the device through the vent hole 54 on the catalyst body 53 and the gas outlet pipe 55. Therefore, this device can effectively remove the dust accumulation on the surface of the fine filter screen 52 and the catalyst body 53 without disassembling the equipment by working together with the soot blowing structure 4 and the catalyst cleaning device 5, avoiding catalyst blockage, improving denitrification efficiency, extending catalyst service life, reducing operating costs, and is convenient, stable and reliable to operate.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A device for cleaning the ash of an SCR denitration reactor, comprising a reactor housing (1), characterized in that: The left lower part of the reactor shell (1) is fixedly connected with a control keyboard (2), the front middle part of the reactor shell (1) is fixedly installed with a visual window (3), the left middle part of the reactor shell (1) is fixedly connected with a soot blowing structure (4), the right part of the soot blowing structure (4) is located in the reactor shell (1), the upper middle part of the reactor shell (1) is fixedly connected with a catalyst cleaning device (5), the lower part of the catalyst cleaning device (5) is located in the reactor shell (1) and is movably connected with the soot blowing structure (4), the lower middle part of the reactor shell (1) is provided with a through clamping slot (6), the annular soot collecting box (7) is movably connected in the clamping slot (6), the lower middle part of the annular soot collecting box (7) is provided with a through hole (9), the upper end of the annular soot collecting box (7) is provided with an annular soot collecting groove (10), and the lower end of the reactor shell (1) is fixedly connected with a reinforcing leg (8).
2. The ash removal device for the SCR denitration reactor according to claim 1, characterized in that: The soot blowing structure (4) comprises a suction pump (41), the suction pump (41) is fixedly connected with the left middle part of the reactor shell (1), the right end of the suction pump (41) is fixedly connected with an ash inlet pipe (42), the output end of the suction pump (41) is fixedly connected with a connecting pipe (43), the connecting pipe (43) extends to the left part in the reactor shell (1) and is fixedly connected with a rectangular pipe (44), the left end of the rectangular pipe (44) is fixedly connected with five annular pipes (45) at equal distances from top to bottom, and the inner walls of the five annular pipes (45) are fixedly connected with a plurality of ash outlet nozzles (46).
3. The ash removal device for SCR denitration reactor according to claim 2, characterized in that: The plurality of ash outlet nozzles (46) are arranged in an annular array.
4. The ash removal device for the SCR denitration reactor according to claim 1, characterized in that: The catalyst cleaning device (5) comprises a hollow bottom plate seat (51) and a driver (57), the outer surface of the hollow bottom plate seat (51) is fixedly connected with the inner wall of the lower part of the reactor shell (1), the upper end of the hollow bottom plate seat (51) is sequentially fixedly connected with a fine filter ash net (52) and a catalyst body (53) from outside to inside, the outer surface of the catalyst body (53) is annularly arranged and provided with a plurality of through air holes (54), the lower middle part of the catalyst body (53) and the hollow bottom plate seat (51) are fixedly connected with an air outlet pipe (55), the upper part of the air outlet pipe (55) extends into the catalyst body (53), a cleaning cavity (56) is formed between the catalyst body (53) and the fine filter ash net (52), the driver (57) is fixedly connected with the upper end of the reactor shell (1), the output end of the driver (57) penetrates through the upper middle part of the reactor shell (1) and is fixedly connected with a fixed rod (58), the lower end of the fixed rod (58) is fixedly connected with a brush frame (59), one end of the brush frame (59) close to the fine filter ash net (52) is fixedly connected with an inner brush (591), and the left part and the right part of the inner upper wall of the brush frame (59) are fixedly connected with two-sided brushes (592).
5. The SCR denitration reactor ash removal device according to claim 4, characterized in that: Several of the air holes (54) are in common with the inside of the air outlet pipe (55), the lower part of the air outlet pipe (55) passes through the hole (9) and is located outside the lower end of the reactor shell (1), two of the inner brushes (591) are in common with the outer surface of the fine filter ash screen (52) and are not fixed, two of the double-sided brushes (592) are in common located in the cleaning cavity (56) and are in common with the inner wall surface of the fine filter ash screen (52) and the outer surface of the catalyst body (53) and are not fixed, the inner upper wall of the brush frame (59) is in common with the upper end surface of the fine filter ash screen (52) and the catalyst body (53) and is not fixed.
6. The SCR denitration reactor ash removal device according to claim 4, characterized in that: The fine filter ash screen (52) and the catalyst body (53) are in common located in the position between the five annular pipes (45), the brush frame (59) does not contact the several ash outlets (46), the hollow bottom plate base (51) is located directly above the annular ash receiving box (7), and the hollow bottom plate base (51) is communicated with the annular ash receiving groove (10).