Efficient denitration device of circulating fluidized bed boiler

Abstract

The invention discloses an efficient denitration device of a circulating fluidized bed boiler, and relates to the technical field of denitration, the efficient denitration device comprises a treatment tower, the surface of the treatment tower is fixedly provided with a smoke inlet, the surface of the treatment tower is fixedly provided with a smoke outlet, the bottom of the treatment tower is fixedly provided with a discharge pipe, and the top of the treatment tower is fixedly provided with a purification device; a liquid outlet pipe is arranged at the bottom of the purification device; the scraping device is arranged in the treatment tower, the scraping device comprises a motor, a reciprocating screw rod, a fixed rod, a threaded block, a circular concave plate, an elastic telescopic rod, a scraping plate, an L-shaped rod and a trapezoidal block, the motor rotates to drive the reciprocating screw rod to rotate, the reciprocating screw rod rotates to drive the elastic telescopic rod to rotate, the motor is fixedly mounted at the top of the treatment tower, and the fixed rod is fixedly mounted at the bottom of the treatment tower. And smoke dust in the flue gas is prevented from adhering to the interior of the treatment tower due to long-time introduction of the flue gas, and a smoke inlet is blocked due to long-time accumulation, so that the denitration efficiency is not influenced.

Description

Technical Field

[0001] The invention relates to the technical field of denitration, in particular to a high-efficiency denitration device for a circulating fluidized bed boiler. Background Art

[0002] The high-efficiency denitrification device of the circulating fluidized bed boiler introduces ammonia or urea into the boiler flue to react with nitrogen dioxide on a catalyst to generate nitrogen and water.

[0003] The patent with patent announcement number CN216093018U relates to a circulating fluidized bed boiler flue gas desulfurization and denitrification device. In view of the problem that the flue gas is relatively uneven and the filtering effect is poor when spraying, the following scheme is proposed, which includes a treatment tower, the outer wall of the treatment tower is connected with an air inlet pipe and an air outlet pipe, the bottom of the treatment tower is connected with a discharge pipe, the top of the treatment tower is connected with an installation box, and the top of the installation box is connected with two symmetrically arranged conduits; the patent drives the spray head to swing back and forth through a swing component to increase the spraying area of ​​the spray head, so that the spray head is more uniform when spraying the flue gas, the flue gas and the absorption liquid react more fully, and the desulfurization and denitrification effect of the flue gas is improved. The filter plate is vibrated and impurities are removed by the impurity removal mechanism, so that the filter plate will not adsorb more desulfurization by-products or ash when filtering the flue gas, thereby improving the circulation effect and impurity removal efficiency of the filter plate when filtering impurities.

[0004] In the above patent, the sprinkler head is driven to swing back and forth by a swinging assembly to increase the spraying area of ​​the sprinkler head, so that the sprinkler head can spray the flue gas more evenly, so that the flue gas and the absorption liquid can react more fully, and the desulfurization and denitrification effects of the flue gas can be improved. The filter plate is vibrated and de-impurified by the impurity removal mechanism, so that the filter plate will not adsorb more desulfurization by-products or soot when filtering the flue gas, thereby improving the flow effect and impurity removal efficiency of the filter plate when filtering impurities. However, there will be many impurities in the flue gas, and the impurities will adhere to the inside of the treatment tower, which will cause the treatment tower to be attached with too many impurities, resulting in trouble for cleaning later, and affecting the denitrification efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a high-efficiency denitration device for a circulating fluidized bed boiler, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-efficiency denitrification device for a circulating fluidized bed boiler, comprising: a treatment tower, a smoke inlet is fixedly installed on the surface of the treatment tower, a smoke outlet is fixedly installed on the surface of the treatment tower, a discharge pipe is fixedly installed at the bottom of the treatment tower, a purification device is fixedly installed on the top of the treatment tower, and a liquid outlet pipe is arranged at the bottom of the purification device; a scraping device, the scraping device is arranged inside the treatment tower, and the scraping device includes a motor, a reciprocating screw, a fixed rod, a threaded block, a circular concave plate, an elastic telescopic rod, a scraper, an L-shaped rod and a trapezoidal block, the rotation of the motor drives the reciprocating screw to rotate, the rotation of the reciprocating screw drives the elastic telescopic rod to rotate, and the rotation of the elastic telescopic rod drives the scraper The plate rotates, and the scraper is used to rotate to scrape the inner wall of the processing tower. The motor is fixedly installed on the top of the processing tower, the reciprocating screw is fixedly installed on the output end of the motor, the fixed rod is fixedly installed on the top of the inner wall of the processing tower, the threaded block is threadedly installed on the surface of the reciprocating screw, the circular concave plate is fixedly installed on the surface of the threaded block, the elastic telescopic rod is fixedly installed on the surface of the reciprocating screw, the scraper is slidably installed on the free end of the elastic telescopic rod, the L-shaped rod is fixedly installed on the free end of the elastic telescopic rod, and the trapezoidal block is fixedly installed on the surface of the L-shaped rod. The reciprocating screw will drive the threaded block to reciprocate during rotation, and the reciprocating motion of the threaded block will drive the circular concave plate to reciprocate, and the circular concave plate will contact the inclined surface of the trapezoidal block when it moves downward.

[0007] According to the above technical solution, a connecting plate is fixedly installed at the fixed end of the elastic telescopic rod, a protrusion is fixedly installed on the top of the connecting plate, and an L-shaped plate is fixedly installed on the surface of the scraper. The movement of the scraper toward the inner wall of the processing tower will drive the L-shaped plate to move toward the inner wall of the processing tower. The L-shaped plate moves toward the inner wall of the processing tower and contacts with the protrusion, and the protrusion pushes the L-shaped plate upward.

[0008] According to the above technical solution, the circular concave plate is arranged above the trapezoidal block, and a No. 1 spring is arranged between the scraper and the elastic telescopic rod, and the scraper is driven to reset by the No. 1 spring.

[0009] According to the above technical solution, a spraying device for denitrification is provided at the bottom of the purification device, and a dredging device is provided inside the spraying device. The spraying device includes a telescopic elastic rod, a support plate, an L-shaped spiral rod, a rotating nozzle and a threaded ring. The circular concave plate moves upward to push the support plate upward. The upward movement of the support plate will drive the free end of the telescopic elastic rod to contract. The contraction of the free end of the telescopic elastic rod will drive the L-shaped spiral rod to move upward. The telescopic elastic rod is fixedly installed on the top of the inner wall of the treatment tower, the support plate is fixedly installed on the free end of the telescopic elastic rod, the L-shaped spiral rod is fixedly installed on the bottom of the telescopic elastic rod, the rotating nozzle is rotatably installed at the bottom of the purification device, the threaded ring is fixedly installed at the bottom of the rotating nozzle, and the threaded ring is threadedly connected to the L-shaped spiral rod.

[0010] According to the above technical solution, a long rod is fixedly installed on the top of the rotating nozzle, and a rotating plate is fixedly installed on the surface of the long rod. The rotation of the rotating nozzle will drive the long rod to rotate, and the rotation of the long rod will drive the rotating plate to rotate. The rotation of the rotating plate will stir the urea in the purification device.

[0011] According to the above technical solution, the support plate is arranged above the circular concave plate, so that when the circular concave plate moves upward, it pushes the support plate to move upward. The rotating plate is arranged inside the purification device, and the urea inside the purification device is stirred by the rotating plate.

[0012] According to the above technical scheme, the dredging device includes a short rod, a sliding rod, a rotating plate, an elastic telescopic connecting rod, an annular plate, a dredging rod and a limit block. The rotation of the long rod will drive the short rod to rotate, and the rotation of the short rod will contact the inclined surface of the rotating plate. The rotating plate is limited by the limit block, so that the short rod will push the rotating plate to move downward, and the downward movement of the rotating plate will drive the sliding rod to move downward. The short rod is fixedly installed on the surface of the long rod, the sliding rod is slidably installed on the inner wall of the liquid outlet pipe, the rotating plate is rotatably installed on the surface of the sliding rod, the elastic telescopic connecting rod is fixedly installed on the inner wall of the rotating nozzle, the annular plate is fixedly installed on the free end of the elastic telescopic connecting rod, and the limit block is fixedly installed on the surface of the sliding rod. During the reverse rotation of the long rod, the short rod will drive the reverse rotation of the short rod, and the short rod will contact the rotating plate during the reverse rotation, and the short rod will push the rotating plate to flip downward.

[0013] According to the above technical solution, the short rod and the rotating plate are arranged on the same horizontal plane, the sliding rod is in contact with the surface of the annular plate, and the sliding rod pushes the annular plate downward to dredge the nozzle.

[0014] According to the above technical solution, a torsion spring No. 1 is arranged between the sliding rod and the rotating plate, and the rotating plate is driven to reset by the torsion spring No. 1. The limit block contacts the surface of the rotating plate, and the rotating plate is limited by the limit block so that the rotating plate can only rotate in one direction.

[0015] The present invention provides a high-efficiency denitration device for a circulating fluidized bed boiler, which has the following beneficial effects:

[0016] (1) The invention utilizes a rotating scraper to scrape the inner wall of the treatment tower to prevent smoke dust from being attached to the inside of the treatment tower due to the long-term introduction of flue gas. Long-term accumulation will block the smoke inlet and affect the denitrification efficiency. At the same time, the elastic force of the elastic telescopic rod will drive the scraper to reset and separate the scraper from the inner wall of the treatment tower to prevent the treatment tower and the scraper from being damaged due to long-term scraping, which will affect the service life. The vibration generated by the contact between the protrusion and the L-shaped plate will shake off the impurities attached to the scraper to prevent excessive attachment of impurities that will affect the service life of the scraper and the scraping effect.

[0017] (2) In the present invention, the upward movement of the L-shaped spiral rod squeezes the threaded ring to rotate, and the rotation of the threaded ring drives the rotating nozzle to rotate. The rotation of the rotating nozzle can make the urea spray more widely. The wider spraying range can ensure the uniform distribution of urea in the boiler, increase its contact opportunities with nitrogen oxides, and thus improve the overall efficiency of the denitrification reaction. At the same time, the rotation of the rotating plate will stir the urea in the purification device. Stirring can improve the uniform distribution of urea in the solution, ensure that the urea is fully dissolved, form a uniform solution, and improve the denitrification effect.

[0018] (3) In the present invention, the downward movement of the annular plate will drive the unblocking rod to move downward, and the downward movement of the unblocking rod will unblock the nozzle of the rotating nozzle to prevent the dust in the flue gas from clogging the nozzle, resulting in the nozzle being unable to spray urea during spraying, affecting the denitrification effect on the flue gas. At the same time, the elastic telescopic connecting rod will drive the annular plate to reset, and the reset of the annular plate will drive the unblocking rod to reset. The unblocking rod is quickly reset to prevent the nozzle from being blocked for a long time and affecting the spraying effect. At the same time, the short rod will contact the rotating plate during the reverse rotation process, and the short rod will push the rotating plate to flip downward to prevent the short rod from continuously pushing the rotating plate and the sliding rod downward to unblock the nozzle during the reversal process, affecting the spraying effect of the rotating nozzle and reducing the denitrification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the scraping device of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A;

[0023] Figure 5 It is a schematic diagram of the structure of the spraying device of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the clean rotating nozzle and the purification device of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the structure of part B in the middle is enlarged;

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the rotary nozzle of the present invention.

[0027] In the figure: 1. treatment tower; 2. smoke inlet; 3. smoke outlet; 4. discharge pipe; 5. purification device; 6. motor; 7. reciprocating screw; 8. fixed rod; 9. threaded block; 10. circular concave plate; 11. elastic telescopic rod; 12. scraper; 13. L-shaped rod; 14. trapezoidal block; 15. connecting plate; 16. convex block; 17. L-shaped plate; 181. telescopic spring rod; 182. support plate; 183. L-shaped spiral rod; 184. rotating nozzle; 185. threaded ring; 186. long rod; 187. rotating plate; 191. short rod; 192. sliding rod; 193. rotating plate; 194. elastic telescopic connecting rod; 195. annular plate; 196. dredging rod; 197. limit block. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-Figure 4 One embodiment of the present invention is: a high-efficiency denitration device for a circulating fluidized bed boiler, comprising: a treatment tower 1, a smoke inlet 2 is fixedly installed on the surface of the treatment tower 1, a smoke outlet 3 is fixedly installed on the surface of the treatment tower 1, a discharge pipe 4 is fixedly installed at the bottom of the treatment tower 1, a purification device 5 is fixedly installed on the top of the treatment tower 1, and a liquid outlet pipe is arranged at the bottom of the purification device 5; a scraping device, the scraping device is arranged inside the treatment tower 1, and the scraping device includes a motor 6, a reciprocating screw 7, a fixed rod 8, a threaded block 9, a circular concave plate 10, an elastic telescopic rod 11, a scraper 12, an L-shaped rod 13 and a trapezoidal block 14, to prevent the smoke dust in the smoke from being attached to the treatment tower 1 due to the long-term introduction of smoke The smoke inlet 2 will be blocked by long-term accumulation, affecting the denitrification efficiency. The motor 6 is fixedly mounted on the top of the treatment tower 1, the reciprocating screw rod 7 is fixedly mounted on the output end of the motor 6, the fixed rod 8 is fixedly mounted on the top of the inner wall of the treatment tower 1, the threaded block 9 is threadedly mounted on the surface of the reciprocating screw rod 7, the circular concave plate 10 is fixedly mounted on the surface of the threaded block 9, the elastic telescopic rod 11 is fixedly mounted on the surface of the reciprocating screw rod 7, the scraper 12 is slidably mounted on the free end of the elastic telescopic rod 11, the L-shaped rod 13 is fixedly mounted on the free end of the elastic telescopic rod 11, and the trapezoidal block 14 is fixedly mounted on the surface of the L-shaped rod 13 to prevent long-term scraping, which will cause damage to the treatment tower 1 and the scraper 12 and affect the service life.

[0030] A connecting plate 15 is fixedly installed at the fixed end of the elastic telescopic rod 11, a protrusion 16 is fixedly installed on the top of the connecting plate 15, and an L-shaped plate 17 is fixedly installed on the surface of the scraper 12. The vibration generated by the contact between the protrusion 16 and the L-shaped plate 17 can shake off the impurities attached to the scraper 12, preventing excessive attachment of impurities from affecting the service life and scraping effect of the scraper 12.

[0031] The circular concave plate 10 is arranged above the trapezoidal block 14, and a No. 1 spring is arranged between the scraper 12 and the elastic telescopic rod 11, and the scraper 12 is driven to reset by the No. 1 spring.

[0032] When the present embodiment is working, the flue gas containing nitrate is transported into the treatment tower 1 through the smoke inlet 2, and the urea sprayed by the purification device 5 reacts with the nitrogen dioxide on the catalyst to generate nitrogen and water, so as to treat the nitrate in the flue gas. At the same time, the motor 6 rotates to drive the reciprocating screw 7 to rotate, and the reciprocating screw 7 rotates to drive the elastic telescopic rod 11 to rotate. The rotation of the elastic telescopic rod 11 will drive the scraper 12 to rotate, and the scraper 12 is used to scrape the inner wall of the treatment tower 1 to prevent the smoke dust in the smoke from being attached to the inside of the treatment tower 1 due to the long-term introduction of smoke. The long-term accumulation will block the smoke inlet 2 and affect the denitrification efficiency. At the same time, the reciprocating screw 7 will drive the threaded block 9 to reciprocate during the rotation, and the reciprocating motion of the threaded block 9 will drive the circular concave plate 10 to reciprocate. When the circular concave plate 10 moves downward, it will contact the inclined surface of the trapezoidal block 14, and the circular concave plate 10 will push the trapezoidal block 14 to move in the direction close to the inner wall of the treatment tower 1. When the block 14 moves toward the direction close to the inner wall of the processing tower 1, the L-shaped rod 13 and the scraper 12 will move toward the direction close to the inner wall of the processing tower 1. The scraper 12 moves toward the direction close to the inner wall of the processing tower 1 to scrape the inner wall of the processing tower 1. When the circular concave plate 10 moves upward, the elastic force of the elastic telescopic rod 11 itself will drive the scraper 12 to reset, so that the scraper 12 is separated from the inner wall of the processing tower 1 to prevent long-term scraping, which will cause damage to the processing tower 1 and the scraper 12 and affect the service life. At the same time, when the scraper 12 moves toward the direction close to the inner wall of the processing tower 1, the L-shaped plate 17 will be driven to move toward the direction close to the inner wall of the processing tower 1. The L-shaped plate 17 moves toward the direction close to the inner wall of the processing tower 1 and contacts with the protrusion 16. The protrusion 16 will push the L-shaped plate 17 upward, and the vibration generated by the contact between the protrusion 16 and the L-shaped plate 17 will shake off the impurities attached to the scraper 12, preventing excessive attachment of impurities from affecting the service life and scraping effect of the scraper 12.

[0033] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, a spraying device for denitrification is provided at the bottom of the purification device 5, and a dredging device is provided inside the spraying device. The spraying device includes a telescopic elastic rod 181, a support plate 182, an L-shaped spiral rod 183, a rotating nozzle 184 and a threaded ring 185. The telescopic elastic rod 181 is fixedly installed on the top of the inner wall of the treatment tower 1, the support plate 182 is fixedly installed on the free end of the telescopic elastic rod 181, the L-shaped spiral rod 183 is fixedly installed on the bottom of the telescopic elastic rod 181, the rotating nozzle 184 is rotatably installed at the bottom of the purification device 5, the threaded ring 185 is fixedly installed on the bottom of the rotating nozzle 184, and the threaded ring 185 is threadedly connected to the L-shaped spiral rod 183. The rotation of the rotating nozzle 184 will make the urea spray more widely. The wider spraying range can ensure the uniform distribution of urea in the boiler, increase its contact opportunity with nitrogen oxides, and thus improve the overall efficiency of the denitrification reaction.

[0034] A long rod 186 is fixedly installed on the top of the rotating nozzle 184, and a rotating plate 187 is fixedly installed on the surface of the long rod 186. Stirring can improve the uniform distribution of urea in the solution, ensure that the urea is fully dissolved, form a uniform solution, and improve the denitrification effect.

[0035] The support plate 182 is arranged above the circular concave plate 10 so that when the circular concave plate 10 moves upward, it pushes the support plate 182 to move upward. The rotating plate 187 is arranged inside the purification device 5 to stir the urea inside the purification device 5 through the rotating plate 187 .

[0036] The dredging device includes a short rod 191, a sliding rod 192, a rotating plate 193, an elastic telescopic connecting rod 194, an annular plate 195, a dredging rod 196 and a limit block 197 to prevent dust in the flue gas from clogging the nozzle, resulting in the nozzle being unable to spray urea during spraying, affecting the denitrification effect on the flue gas. The short rod 191 is fixedly mounted on the surface of the long rod 186, the sliding rod 192 is slidably mounted on the inner wall of the liquid outlet pipe, the rotating plate 193 is rotatably mounted on the surface of the sliding rod 192, the elastic telescopic connecting rod 194 is fixedly mounted on the inner wall of the rotating nozzle 184, the annular plate 195 is fixedly mounted on the free end of the elastic telescopic connecting rod 194, and the limit block 197 is fixedly mounted on the surface of the sliding rod 192 to prevent the short rod 191 from continuously pushing the rotating plate 193 and the sliding rod 192 downward to dredge during the reversal process, affecting the spraying effect of the rotating nozzle 184 and reducing the denitrification effect.

[0037] The short rod 191 and the rotating plate 193 are arranged at the same horizontal plane, and the sliding rod 192 is in contact with the surface of the annular plate 195 , and the annular plate 195 is pushed downward by the sliding rod 192 to dredge the nozzle.

[0038] A torsion spring No. 1 is arranged between the sliding rod 192 and the rotating plate 193, and the rotating plate 193 is reset by the torsion spring No. 1. The limit block 197 contacts the surface of the rotating plate 193, and the rotating plate 193 is limited by the limit block 197, so that the rotating plate 193 can only rotate in one direction.

[0039] When the present embodiment is working, the circular concave plate 10 moves upward to push the support plate 182 to move upward. The upward movement of the support plate 182 will drive the free end of the telescopic elastic rod 181 to contract. The contraction of the free end of the telescopic elastic rod 181 will drive the L-shaped spiral rod 183 to move upward. The upward movement of the L-shaped spiral rod 183 will squeeze the threaded ring 185 to rotate. The rotation of the threaded ring 185 will drive the rotating nozzle 184 to rotate. The rotation of the rotating nozzle 184 will make the urea spray more widely. The wider spraying range can ensure the uniform distribution of urea in the boiler and increase its contact opportunities with nitrogen oxides, thereby improving the overall efficiency of the denitration reaction. At the same time, the rotation of the rotating nozzle 184 will drive the long rod 186 to rotate. The rotation of the long rod 186 will drive the rotating plate 187 to rotate. The rotation of the rotating plate 187 will stir the urea in the purification device 5. Stirring can improve the uniform distribution of urea in the solution, ensure that the urea is fully dissolved, form a uniform solution, and improve the denitration effect.

[0040] The rotation of the long rod 186 will drive the short rod 191 to rotate, and the rotation of the short rod 191 will contact the inclined surface of the rotating plate 193. The rotating plate 193 is limited by the limit block 197, so that the short rod 191 will push the rotating plate 193 to move downward, and the downward movement of the rotating plate 193 will drive the sliding rod 192 to move downward, and the downward movement of the sliding rod 192 will push the annular plate 195 to move downward, and the downward movement of the annular plate 195 will drive the dredging rod 196 to move downward, and the downward movement of the dredging rod 196 will dredge the nozzle of the rotating nozzle 184 to prevent the dust in the flue gas from clogging the nozzle, resulting in the nozzle being unable to spray urea during spraying, affecting the denitration effect on the flue gas. At the same time, when the short rod 191 is separated from the rotating plate 193, the spring 196 will be released. The telescopic connecting rod 194 will drive the annular plate 195 to reset, and the reset of the annular plate 195 will drive the unblocking rod 196 to reset. The unblocking rod 196 is quickly reset to prevent the nozzle from being blocked for a long time and affecting the spraying effect. At the same time, when the L-shaped spiral rod 183 drives the rotating nozzle 184 to reverse, it will drive the long rod 186 to rotate in the opposite direction. During the reverse rotation of the long rod 186, the short rod 191 will drive the reverse rotation. During the reverse rotation of the short rod 191, it will contact the rotating plate 193. The short rod 191 will push the rotating plate 193 to flip downward to prevent the short rod 191 from continuously pushing the rotating plate 193 and the sliding rod 192 to move downward for unblocking during the reversal process, which will affect the spraying effect of the rotating nozzle 184 and reduce the denitrification effect.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency denitration device for a circulating fluidized bed boiler, characterized in that: include: A treatment tower (1), wherein a smoke inlet (2) is fixedly mounted on the surface of the treatment tower (1), a smoke outlet (3) is fixedly mounted on the surface of the treatment tower (1), a discharge pipe (4) is fixedly mounted on the bottom of the treatment tower (1), a purification device (5) is fixedly mounted on the top of the treatment tower (1), and a liquid outlet pipe is arranged at the bottom of the purification device (5); A scraping device, the scraping device is arranged inside a processing tower (1), the scraping device comprises a motor (6), a reciprocating screw rod (7), a fixed rod (8), a threaded block (9), a circular concave plate (10), an elastic telescopic rod (11), a scraper (12), an L-shaped rod (13) and a trapezoidal block (14), the motor (6) is fixedly mounted on the top of the processing tower (1), the reciprocating screw rod (7) is fixedly mounted on the output end of the motor (6), the fixed rod (8) is fixedly mounted on the top of the inner wall of the processing tower (1), the threaded block (9) is threadedly mounted on the surface of the reciprocating screw rod (7), the circular concave plate (10) is fixedly mounted on the surface of the threaded block (9), the elastic telescopic rod (11) is fixedly mounted on the surface of the reciprocating screw rod (7), the scraper (12) is slidably mounted on the free end of the elastic telescopic rod (11), the L-shaped rod (13) is fixedly mounted on the free end of the elastic telescopic rod (11), and the trapezoidal block (14) is fixedly mounted on the surface of the L-shaped rod (13); Wherein, a spraying device for denitrification is arranged at the bottom of the purification device (5), and a dredging device is arranged inside the spraying device.

2. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 1, characterized in that: The circular concave plate (10) is arranged above the trapezoidal block (14), and a No. 1 spring is arranged between the scraper (12) and the elastic telescopic rod (11).

3. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 2, characterized in that: The spraying device comprises a telescopic elastic rod (181), a support plate (182), an L-shaped spiral rod (183), a rotating spray head (184) and a threaded ring (185), wherein the telescopic elastic rod (181) is fixedly mounted on the top of the inner wall of the treatment tower (1), the support plate (182) is fixedly mounted on the free end of the telescopic elastic rod (181), the L-shaped spiral rod (183) is fixedly mounted on the bottom of the telescopic elastic rod (181), the rotating spray head (184) is rotatably mounted on the bottom of the purification device (5), and the threaded ring (185) is fixedly mounted on the bottom of the rotating spray head (184), and the threaded ring (185) is threadedly connected to the L-shaped spiral rod (183).

4. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 3, characterized in that: A long rod (186) is fixedly mounted on the top of the rotating spray head (184), and a rotating plate (187) is fixedly mounted on the surface of the long rod (186).

5. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 4, characterized in that: The support plate (182) is arranged above the circular concave plate (10), and the rotating plate (187) is arranged inside the purification device (5).

6. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 5, characterized in that: The dredging device comprises a short rod (191), a sliding rod (192), a rotating plate (193), an elastic telescopic connecting rod (194), an annular plate (195), a dredging rod (196) and a limit block (197); the short rod (191) is fixedly mounted on the surface of the long rod (186); the sliding rod (192) is slidably mounted on the inner wall of the liquid outlet pipe; the rotating plate (193) is rotatably mounted on the surface of the sliding rod (192); the elastic telescopic connecting rod (194) is fixedly mounted on the inner wall of the rotating nozzle (184); the annular plate (195) is fixedly mounted on the free end of the elastic telescopic connecting rod (194); and the limit block (197) is fixedly mounted on the surface of the sliding rod (192).

7. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 6, characterized in that: The short rod (191) and the rotating plate (193) are arranged on the same horizontal plane, and the sliding rod (192) is in surface contact with the annular plate (195).

8. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 7, characterized in that: A first torsion spring is arranged between the sliding rod (192) and the rotating plate (193), and the limiting block (197) is in contact with the surface of the rotating plate (193).

9. The high-efficiency denitration device for a circulating fluidized bed boiler according to claim 1, characterized in that: A connecting plate (15) is fixedly mounted on the fixed end of the elastic telescopic rod (11), a convex block (16) is fixedly mounted on the top of the connecting plate (15), and an L-shaped plate (17) is fixedly mounted on the surface of the scraper (12).

Images