Post-furnace flue gas desulfurization and denitrification purification device of circulating fluidized bed boiler

Abstract

The utility model relates to the field of flue gas desulfurization and denitrification, in particular to a circulating fluidized bed boiler rear flue gas desulfurization and denitrification purification device which comprises a base, a treatment box and a circulating desulfurization assembly, the treatment box is arranged on the base, a flue gas inlet is formed in one side of the treatment box, and an activated carbon adsorption plate is arranged on the other side of the treatment box; the circulating desulfurization assembly is arranged on the treatment box, a first support and a second support are arranged on the two sides of the treatment box respectively, a winding mechanism is arranged on the first support and comprises a filter screen, a moving assembly and a reset assembly, the moving assembly is located on the first support, the reset assembly is located on the second support, and a scraping mechanism is further arranged on the treatment box. And the scraping mechanism comprises a scraping plate and a driving assembly, through the arrangement of the winding mechanism and the scraping mechanism, the filter screen in the treatment box can be drawn out in a reciprocating mode under the action of a moving assembly and a reset assembly in the winding mechanism, and in the process that the filter screen is drawn out, the scraping plate in the scraping assembly can scrape impurities on the surface of the filter screen.

Description

Technical Field

[0001] The utility model relates to the field of flue gas desulfurization and denitration, in particular to a flue gas desulfurization and denitration purification device after a circulating fluidized bed boiler. Background Art

[0002] In recent years, the technology and industrial development of flue gas desulfurization and denitrification in my country has become urgent. Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology used in the chemical industry that produces multiple nitrogen oxides and sulfur oxides. Therefore, the desulfurization and denitrification technology of boiler flue gas has become an important development topic. Therefore, before the boiler flue gas is discharged, it is necessary to use the boiler flue gas desulfurization and denitrification device to desulfurize and denitrify it.

[0003] The currently disclosed Chinese patent application CN113634108A is a desulfurization and denitrification device for boiler flue gas, including a shell and a processing box, a smoke inlet pipe is inserted on one side of the shell, a smoke pipe is inserted between the shell and the processing box, a main pipeline is inserted on the other side of the processing box, one end of the smoke pipe is fixedly connected with a convex smoke filter plate, the convex smoke filter plate is located in the shell, a support frame is fixedly connected between the circumferential inner walls of the smoke pipe, one side of the support frame is fixedly connected with a double-axle extension asynchronous motor, one end of an output shaft of the double-axle extension asynchronous motor is fixedly connected with a plurality of fan blades, and one end of the other output shaft of the double-axle extension asynchronous motor is fixedly connected through the convex smoke filter plate and two cleaning brushes. The present invention can filter and remove solids in boiler flue gas, avoid clogging of the filtering mechanism in the dechlorination and denitrification equipment, and does not need to frequently replace the convex smoke filter plate, thereby improving the use effect of flue gas desulfurization and denitrification.

[0004] According to the above patent, the device sets a filter in the treatment box to filter out impurities in the boiler flue gas. Since the desulfurization is carried out by spraying drugs in the treatment box, during the spraying of the flue gas, the impurities on the filter plate will be wetted by the drugs and attached to the filter plate. Over a long period of time, the impurities will block the filter plate, and the drugs will flow slowly to the bottom of the treatment box, thereby affecting the recycling of the desulfurization drugs. Utility Model Content

[0005] In view of the above problems, a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device is provided. Through the arrangement of a winding mechanism and a scraping mechanism, the filter screen inside the treatment box will be reciprocatedly drawn out by the action of a moving component and a resetting component in the winding mechanism. In the process of the filter screen being drawn out, the scraper in the scraping component will scrape off the impurities on its surface, thereby solving the problem that impurities will block the filter screen over a long period of time, and the drug will flow slowly to the bottom of the treatment box, thereby affecting the recycling of the desulfurization drug.

[0006] In order to solve the problems of the prior art, the utility model provides a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device, comprising a base, a treatment box and a circulating desulfurization component, the treatment box is arranged on the base, a smoke inlet is arranged on one side of the treatment box, an activated carbon adsorption plate is arranged on the other side of the treatment box, the circulating desulfurization component is arranged on the treatment box, a first bracket and a second bracket are respectively arranged on both sides of the treatment box, a winding mechanism is arranged on the first bracket, the winding mechanism comprises a filter screen, a moving component and a reset component, an output end of the moving component is connected to one end of the filter screen, and an output end of the reset component is connected to the other end of the filter screen, the moving component is located on the first bracket, and the reset component is located on the second bracket. A scraping mechanism is also arranged on the treatment box, and the scraping mechanism comprises a scraper and a driving component that can drive the scraper to work.

[0007] Preferably, the moving component includes a first rotating motor, a first winding wheel and a second winding wheel; the first winding wheel is arranged at an end of the first bracket away from the processing box, the first bracket is connected to the processing box, and both ends of the first winding wheel are rotatably connected to the first bracket; the first rotating motor is arranged on the processing box and the first rotating motor is located on one side of the first bracket, the output shaft of the first rotating motor passes through the first bracket and is connected to the first winding wheel, and the first rotating motor is connected to the processing box; the second winding wheel is arranged at an end of the second bracket away from the processing box, the second winding wheel is fixedly connected to the second bracket, one end of the filter net is connected to the first winding wheel, the other end of the filter net passes through the processing box and is connected to the reset component, and the reset component is located on the second winding wheel.

[0008] Preferably, there are multiple reset assemblies, and the multiple reset assemblies are evenly arranged on the second winding wheel, and the multiple reset assemblies all include a spiral spring and a guide plate; the spiral spring is arranged on the second winding wheel, one end of the spiral spring is connected to the second winding wheel, and the other end of the spiral spring is connected to the end of the filter screen away from the first winding wheel; there are two guide plates, and the two guide plates are symmetrically arranged on both sides of the spiral spring, and the guide plates are connected to the second winding wheel and abut against the spiral spring.

[0009] Preferably, the driving assembly includes a second rotating motor, a driving gear, a rack and a driven gear; the second rotating motor is arranged on the processing box, the output shaft of the second rotating motor faces the processing box, and the second rotating motor is connected to the processing box; the driving gear is arranged on the output shaft of the second rotating motor and the driving gear is connected to the output shaft of the second rotating motor; there are two racks, and the two racks are symmetrically arranged on both sides of the driving gear, the racks are meshed and connected with the driving gears, and a guide assembly for guiding the moving direction of the racks is arranged on the racks; there are two scrapers, and the two scrapers are respectively arranged on the first bracket and the second bracket, and the scrapers are rotatably connected with the corresponding first bracket and the second bracket; the number of driven gears is consistent with the number of scrapers and corresponds one to one, the driven gear is arranged at one end of the scraper close to the rack, the driven gear is connected to the scraper, the driven gear is meshed and connected with the corresponding rack, and a limit assembly for limiting its rotation angle is arranged on the scraper.

[0010] Preferably, the number of guide assemblies is consistent with the number of racks and corresponds one to one, and the guide assemblies include a support block and a guide rod; the support block is arranged on the processing box, and the support block is connected to the processing box; the guide rod is arranged at one end of the support block close to the rack, one end of the guide rod is connected to the support block, and the other end of the guide rod extends to the interior of the rack corresponding to it, and a blind hole for the guide rod to move is opened on the rack, and the guide rod is slidably connected to the rack.

[0011] Preferably, the limit assembly includes a limit rod and a baffle; the number of the limit rods is consistent with the number of scrapers and corresponds one to one, the limit rod is arranged at one end of the scraper, the limit rod is connected to the scraper, and the first bracket and the second bracket are both provided with slots for the corresponding limit rods to rotate; the number of baffles is consistent with the number of scrapers and corresponds one to one, the baffle is arranged in the slot and is located at one end of the limit rod close to the processing box, the baffle is connected to the corresponding first bracket and the second bracket, and the baffle can abut and cooperate with the corresponding limit rod.

[0012] Preferably, guide wheels are provided on both the first bracket and the second bracket, the guide wheels are rotatably connected to the corresponding first bracket and the second bracket, and the guide wheels are in abutment with the filter screen.

[0013] Preferably, the scraper is made of latex.

[0014] Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the winding mechanism and the scraping mechanism, the filter screen inside the processing box can be reciprocatedly drawn out under the action of the moving component and the resetting component in the winding mechanism, and the scraper in the scraping component can scrape off the impurities on its surface during the process of the filter screen being drawn out. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural diagram of a circulating fluidized bed boiler flue gas desulfurization and denitrification purification device. Figure 1.

[0016] Figure 2 This is a three-dimensional structural diagram of a circulating fluidized bed boiler flue gas desulfurization and denitrification purification device. Figure 2 .

[0017] Figure 3 This is a partial three-dimensional structural section of a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device Figure 1 .

[0018] Figure 4 This is a partial three-dimensional structural section of a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device Figure 2 .

[0019] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0020] Figure 6 The present invention is a partial three-dimensional structural cross-sectional view of a driving component in a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device.

[0021] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0022] Figure 8 This is a partial three-dimensional structural section of a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device Figure 2 .

[0023] Fig. 9 yes Figure 8 Enlarged view of point C in the middle.

[0024] The numbers in the figure are: 1. base; 2. treatment box; 11. smoke inlet; 12. activated carbon adsorption plate; 3. circulating desulfurization component; 4. first bracket; 5. second bracket; 6. winding mechanism; 61. filter; 62. moving component; 621. first rotating motor; 622. first winding wheel; 623. second winding wheel; 63. reset component; 631. spiral spring; 632. guide plate; 7. scraping mechanism; 71. driving component; 711. second rotating motor; 712. driving gear; 713. rack; 714. driven gear; 715. scraper; 72. guide component; 721. support block; 722. guide rod; 73. limit component; 731. limit rod; 732. baffle; 74. guide wheel. DETAILED DESCRIPTION

[0025] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Reference Figures 1 to 9 As shown, a circulating fluidized bed boiler post-furnace flue gas desulfurization and denitrification purification device includes a base 1, a treatment box 2 and a circulating desulfurization component 3. The treatment box 2 is arranged on the base 1, a smoke inlet 11 is arranged on one side of the treatment box 2, and an activated carbon adsorption plate 12 is arranged on the other side of the treatment box 2. The circulating desulfurization component 3 is arranged on the treatment box 2, and a first bracket 4 and a second bracket 5 are respectively arranged on both sides of the treatment box 2. A winding mechanism 6 is arranged on the first bracket 4, and the winding mechanism 6 includes a filter screen 61, a moving component 62 and a reset component 63. The output end of the moving component 62 is connected to one end of the filter screen 61, and the output end of the reset component 63 is connected to the other end of the filter screen 61. The moving component 62 is located on the first bracket 4, and the reset component 63 is located on the second bracket 5. A scraping mechanism 7 is also arranged on the treatment box 2, and the scraping mechanism 7 includes a scraper 715 and a driving component 71 that can drive the scraper 715 to work.

[0027] When working, the circulating desulfurization component 3, the winding mechanism 6 and the scraping mechanism 7 are started. When the boiler flue gas enters from the smoke inlet 11, the circulating desulfurization component 3 desulfurizes the boiler flue gas. When the boiler flue gas is treated, impurities will be generated on the surface of the filter screen 61 during the treatment of the boiler flue gas. At this time, the moving component 62 works to pull the filter screen 61 on the second winding wheel 623 toward the first winding wheel 622 and rewind it. When the moving component 62 pulls the filter screen 61, the driving component 71 in the scraping mechanism 7 will drive the scraper 715 to scrape the impurities on the surface of the filter screen 61. In addition, when the moving component 62 finishes winding up, it starts to unwind. During the unwinding process, the filter screen 61 will be wound around the second winding wheel 623 under the action of the reset component 63. During the unwinding process of the moving component 62, the scraper 715 will still scrape the impurities on the surface of the filter screen 61. Through the setting of the winding mechanism 6 and the scraping mechanism 7, the filter screen 61 inside the processing box 2 will be reciprocatedly drawn out under the action of the moving component 62 and the reset component 63 in the winding mechanism 6. During the process of the filter screen 61 being drawn out, the scraper 715 in the scraping mechanism 7 will scrape the impurities on its surface.

[0028] Reference Figure 2 , Figure 3 indivual Figure 4As shown, the moving component 62 includes a first rotating motor 621, a first winding wheel 622 and a second winding wheel 623. The first winding wheel 622 is arranged at one end of the first bracket 4 away from the processing box 2, the first bracket 4 is connected to the processing box 2, both ends of the first winding wheel 622 are rotatably connected to the first bracket 4, the first rotating motor 621 is arranged on the processing box 2 and the first rotating motor 621 is located on one side of the first bracket 4, the output shaft of the first rotating motor 621 passes through the first bracket 4 and is connected to the first winding wheel 622, the first rotating motor 621 is connected to the processing box 2, the second winding wheel 623 is arranged at one end of the second bracket 5 away from the processing box 2, the second winding wheel 623 is fixedly connected to the second bracket 5, one end of the filter screen 61 is connected to the first winding wheel 622, the other end of the filter screen 61 passes through the processing box 2 and is connected to the reset component 63, and the reset component 63 is located on the second winding wheel 623.

[0029] During operation, the first rotating motor 621 is started, and the output shaft of the first rotating motor 621 rotates to drive the first winding wheel 622 connected thereto to rotate. During the rotation and starting process of the first winding wheel 622, the filter screen 61 connected thereto will be driven to move and be wound around the first winding wheel 622. The setting of the reset component 63 on the first winding wheel 622 can wind the filter screen 61 around the second winding wheel 623 when the first rotating motor 621 reverses for unwinding, so that the first winding wheel 622 can pull the filter screen 61 again.

[0030] Reference Figure 4 and Figure 5 As shown, there are multiple reset components 63, and the multiple reset components 63 are evenly distributed on the second winding wheel 623. The multiple reset components 63 all include a spiral spring 631 and a guide plate 632. The spiral spring 631 is arranged on the second winding wheel 623, one end of the spiral spring 631 is connected to the second winding wheel 623, and the other end of the spiral spring 631 is connected to an end of the filter screen 61 away from the first winding wheel 622. There are two guide plates 632, and the two guide plates 632 are symmetrically arranged on both sides of the spiral spring 631. The guide plates 632 are connected to the second winding wheel 623 and abut against the spiral spring 631.

[0031] When the first take-up wheel 622 rotates, the first take-up wheel 622 drives the filter screen 61 to move. When the filter screen 61 moves, the scroll spring 631 is stretched to be in a taut state. When the first take-up wheel 622 reverses to unwind, the scroll spring 631 loses the tension applied by the filter screen 61, so that the scroll spring 631 is reset. During the reset process, the scroll spring 631 wraps the filter screen 61 around the second take-up wheel 623.

[0032] Reference Figure 2 , Figure 6 and Figure 7As shown, the driving assembly 71 includes a second rotary motor 711, a driving gear 712, a rack 713 and a driven gear 714. The second rotary motor 711 is arranged on the processing box 2, and the output shaft of the second rotary motor 711 faces the processing box 2. The second rotary motor 711 is connected to the processing box 2. The driving gear 712 is arranged on the output shaft of the second rotary motor 711. The driving gear 712 is connected to the output shaft of the second rotary motor 711. There are two racks 713, and the two racks 713 are symmetrically arranged on both sides of the driving gear 712. The rack 713 is meshed with the driving gear 712. The rack 713 A guide assembly 72 for guiding the moving direction of the rack 713 is provided on it. There are two scrapers 715. The two scrapers 715 are respectively arranged on the first bracket 4 and the second bracket 5. The scraper 715 is rotatably connected with its corresponding first bracket 4 and second bracket 5. The number of driven gears 714 is consistent with the number of scrapers 715 and corresponds one to one. The driven gear 714 is arranged at one end of the scraper 715 close to the rack 713. The driven gear 714 is connected to the scraper 715. The driven gear 714 is meshed with its corresponding rack 713. A limit assembly 73 for limiting its rotation angle is provided on the scraper 715.

[0033] When the first rotating motor 621 drives the first winding wheel 622 to wind up, the second rotating motor 711 is started, and the direction of the second rotating motor 711 is consistent with the direction of the first rotating motor 621. The second rotating motor 711 drives the driving gear 712 connected thereto to rotate, and the driven gear 714 rotates through the rack 713 to drive the driven gear 714 to rotate. Under the action of the driving gear 712 and the rack 713, the scraper 715 on the second bracket 5 will abut against the filter screen 61 so that Scrape off impurities on the surface of the filter 61, and the scraper 715 on the first bracket 4 will be away from the filter 61. When the first winding wheel 622 is unwinding, the scraper 715 on the first bracket 4 will abut against the filter 61 and more than half of the scraper on the second bracket 5 will be away from the filter 61. The setting of the guide component 72 can ensure the moving direction of the rack 713, and the setting of the limit component 73 can ensure the rotation angle of the scraper 715, so that the scraper 715 can abut against the filter 61 when it is rotated into place.

[0034] Reference Figure 6 and Figure 7As shown, the number of guide assemblies 72 is consistent with the number of racks 713 and corresponds one to one. The guide assemblies 72 include a support block 721 and a guide rod 722. The support block 721 is arranged on the processing box 2, and the support block 721 is connected to the processing box 2. The guide rod 722 is arranged at one end of the support block 721 close to the rack 713. One end of the guide rod 722 is connected to the support block 721, and the other end of the guide rod 722 extends to the inside of the rack 713 corresponding to it. A blind hole for the guide rod 722 to move is opened on the rack 713, and the guide rod 722 is slidably connected to the rack 713.

[0035] The setting of the guide rod 722 can ensure the direction of the rack 713 during movement, and avoid the rack 713 from deviating during the movement.

[0036] Reference Figure 8 and Fig. 9 As shown, the limiting assembly 73 includes a limiting rod 731 and a baffle 732. The number of the limiting rods 731 is consistent with the number of the scrapers 715 and corresponds one to one. The limiting rod 731 is arranged at one end of the scraper 715, and the limiting rod 731 is connected to the scraper 715. The first bracket 4 and the second bracket 5 are both provided with slots for the corresponding limiting rods 731 to rotate. The number of the baffles 732 is consistent with the number of the scrapers 715 and corresponds one to one. The baffle 732 is arranged in the slot and is located at one end of the limiting rod 731 close to the processing box 2. The baffle 732 is connected to the corresponding first bracket 4 and the second bracket 5, and the baffle 732 can abut and cooperate with the corresponding limiting rod 731.

[0037] When the scraper 715 rotates, the rotation of the scraper 715 drives the limiting rod 731 connected thereto to rotate. When the limiting rod 731 touches the baffle 732, it means that the scraper 715 is rotated into place.

[0038] Reference Figure 3 As shown, guide wheels 74 are provided on the first bracket 4 and the second bracket 5 . The guide wheels 74 are rotatably connected to the corresponding first bracket 4 and the second bracket 5 , and the guide wheels 74 are in abutment with the filter screen 61 .

[0039] During the movement of the filter screen 61 , the guide wheel 74 can ensure that the filter screen 61 is always in a horizontal state to enter and exit the processing box 2 .

[0040] Reference Figure 2 As shown, the scraper 715 is made of latex.

[0041] The scraper 715 made of latex material can minimize the damage of the scraper 715 to the filter screen 61 when scraping the filter screen 61, thereby extending the service life of the filter screen 61.

[0042] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A circulating fluidized bed boiler flue gas desulfurization and denitrification purification device, comprising a base (1), a treatment box (2) and a circulating desulfurization component (3), wherein the treatment box (2) is arranged on the base (1), a smoke inlet (11) is arranged on one side of the treatment box (2), an activated carbon adsorption plate (12) is arranged on the other side of the treatment box (2), and the circulating desulfurization component (3) is arranged on the treatment box (2). It is characterized in that A first bracket (4) and a second bracket (5) are respectively arranged on both sides of the processing box (2); a winding mechanism (6) is arranged on the first bracket (4); the winding mechanism (6) comprises a filter screen (61), a moving component (62) and a reset component (63); an output end of the moving component (62) is connected to one end of the filter screen (61); an output end of the reset component (63) is connected to the other end of the filter screen (61); the moving component (62) is located on the first bracket (4); the reset component (63) is located on the second bracket (5); a scraping mechanism (7) is also arranged on the processing box (2); the scraping mechanism (7) comprises a scraper (715) and a driving component (71) capable of driving the scraper (715) to work.

2. A circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 1, It is characterized in that The moving assembly (62) comprises a first rotating motor (621), a first winding wheel (622) and a second winding wheel (623); The first winding wheel (622) is arranged at one end of the first bracket (4) away from the processing box (2), the first bracket (4) is connected to the processing box (2), and both ends of the first winding wheel (622) are rotatably connected to the first bracket (4); The first rotating motor (621) is arranged on the processing box (2) and is located on one side of the first bracket (4); the output shaft of the first rotating motor (621) passes through the first bracket (4) and is connected to the first winding wheel (622); the first rotating motor (621) is connected to the processing box (2); The second winding wheel (623) is arranged at one end of the second bracket (5) away from the processing box (2). The second winding wheel (623) is fixedly connected to the second bracket (5), one end of the filter screen (61) is connected to the first winding wheel (622), and the other end of the filter screen (61) passes through the processing box (2) and is connected to the reset component (63), and the reset component (63) is located on the second winding wheel (623).

3. The circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 1, It is characterized in that There are multiple reset assemblies (63), and the multiple reset assemblies (63) are evenly arranged on the second winding wheel (623). The multiple reset assemblies (63) each include a spiral spring (631) and a guide plate (632); The spiral spring (631) is arranged on the second winding wheel (623), one end of the spiral spring (631) is connected to the second winding wheel (623), and the other end of the spiral spring (631) is connected to an end of the filter screen (61) away from the first winding wheel (622); There are two guide plates (632), which are symmetrically arranged on both sides of the spiral spring (631). The guide plates (632) are connected to the second winding wheel (623) and are in abutment with the spiral spring (631).

4. The circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 1, It is characterized in that The driving assembly (71) includes a second rotating motor (711), a driving gear (712), a rack (713) and a driven gear (714); The second rotating motor (711) is arranged on the processing box (2), the output shaft of the second rotating motor (711) faces the processing box (2), and the second rotating motor (711) is connected to the processing box (2); The driving gear (712) is arranged on the output shaft of the second rotating motor (711) and the driving gear (712) is connected to the output shaft of the second rotating motor (711); There are two racks (713), which are symmetrically arranged on both sides of the driving gear (712), the racks (713) are meshed and connected with the driving gear (712), and a guide component (72) for guiding the moving direction of the racks (713) is arranged on the racks (713); There are two scrapers (715), which are respectively arranged on the first bracket (4) and the second bracket (5), and the scrapers (715) are rotatably connected to the corresponding first bracket (4) and the second bracket (5); The number of driven gears (714) is consistent with the number of scrapers (715) and corresponds one to one. The driven gear (714) is arranged at one end of the scraper (715) close to the rack (713). The driven gear (714) is connected to the scraper (715). The driven gear (714) is meshedly connected with the corresponding rack (713). The scraper (715) is provided with a limit assembly (73) for limiting its rotation angle.

5. A circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 4, It is characterized in that The number of the guide assemblies (72) is consistent with the number of the racks (713) and corresponds one to one. The guide assemblies (72) include a support block (721) and a guide rod (722); The support block (721) is disposed on the processing box (2), and the support block (721) is connected to the processing box (2); The guide rod (722) is arranged at one end of the support block (721) close to the rack (713), one end of the guide rod (722) is connected to the support block (721), the other end of the guide rod (722) extends to the inside of the rack (713) corresponding thereto, a blind hole for the guide rod (722) to move is provided on the rack (713), and the guide rod (722) is slidably connected to the rack (713).

6. A circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 4, It is characterized in that The limiting assembly (73) comprises a limiting rod (731) and a baffle (732); The number of the limiting rods (731) is consistent with the number of the scrapers (715) and corresponds one to one. The limiting rods (731) are arranged at one end of the scrapers (715). The limiting rods (731) are connected to the scrapers (715). The first bracket (4) and the second bracket (5) are both provided with slots for the corresponding limiting rods (731) to rotate. The number of baffles (732) is consistent with the number of scrapers (715) and corresponds one to one. The baffles (732) are arranged in the notch and are located at one end of the limiting rod (731) close to the processing box (2). The baffles (732) are connected to the corresponding first bracket (4) and the second bracket (5). The baffles (732) can be abutted and matched with the corresponding limiting rod (731).

7. The circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 1, It is characterized in that The first bracket (4) and the second bracket (5) are both provided with guide wheels (74), the guide wheels (74) are rotatably connected to the corresponding first bracket (4) and second bracket (5), and the guide wheels (74) are in abutment with the filter screen (61).

8. The circulating fluidized bed boiler flue gas desulfurization and denitrification purification device according to claim 4, It is characterized in that The scraper (715) is made of latex.

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