Reaction device for flue gas denitration

Abstract

The utility model discloses a reaction device for flue gas denitrification, which comprises a device body, a filter cavity, a heating cavity, a reaction cavity, an ammonia preparation cavity, a smoke inlet, a plurality of filter plates, a heating device, a smoke outlet, an ammonia gas generating device and a gas guide pipe, and the filter cavity, the heating cavity, the reaction cavity and the ammonia preparation cavity are sequentially arranged in the device body from left to right. The smoke inlet is formed in the bottom of the side wall of the left end of the device body, the multiple filter plates are evenly arranged in the filter cavity, the heating device is arranged in the heating cavity, and the smoke outlet is formed in the bottom of the right end of the heating device and extends into the reaction cavity. The ammonia gas generation device is arranged in the ammonia preparation cavity, and the gas guide pipe is arranged at the left end of the ammonia gas generation device and extends into the reaction cavity. According to the scheme, the mixing efficiency of flue gas and ammonia gas is greatly improved, and the denitration efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to burner technical field, concretely is a kind of reaction device for flue gas denitrification. BACKGROUND

[0002] Flue gas denitrification technology mainly has dry method and wet method two, compared with wet method flue gas denitrification technology, the main advantages of dry method flue gas denitrification technology are low basic investment, equipment and process simple, the efficiency of removal NOX is also higher, no waste water and waste disposal, not easy to cause secondary pollution.But in prior art, there is still deficiency.

[0003] The existing reaction device for flue gas denitrification is not uniform in mixing ammonia gas with flue gas, and the NOx in some areas cannot fully contact with ammonia gas, resulting in insufficient denitrification reaction, thereby reducing the overall denitrification efficiency.

[0004] Therefore, a solution is needed. UTILITY MODEL CONTENT

[0005] (I) technical problem solved

[0006] In view of the deficiencies of the prior art, the utility model provides a reaction device for flue gas denitrification to solve the problems in the above background art.

[0007] (II) technical scheme

[0008] To achieve the above purpose, the utility model realizes by the following technical scheme:

[0009] A reaction device for flue gas denitrification, comprising a device body, a filter cavity, a heating cavity, a reaction cavity, an ammonia preparation cavity, a smoke inlet, a plurality of filter plates, a heating device, a smoke outlet, an ammonia gas generating device and a gas guide pipe, the filter cavity, the heating cavity, the reaction cavity and the ammonia preparation cavity are sequentially arranged inside the device body from left to right, the smoke inlet is arranged at the bottom of the left end side wall of the device body, the plurality of filter plates are evenly arranged inside the filter cavity, the heating device is arranged inside the heating cavity, the smoke outlet is arranged at the right end bottom of the heating device and extends to the inside of the reaction cavity, the ammonia gas generating device is arranged inside the ammonia preparation cavity, and the gas guide pipe is arranged at the left end of the ammonia gas generating device and extends to the inside of the reaction cavity.

[0010] The reaction chamber is equipped with an ammonia injection grid, a strong mixing mechanism, an SCR catalyst, several through holes, a smoke guide chamber, and a smoke outlet. The ammonia injection grid is located at the bottom of the reaction chamber and at the left end of the gas guide pipe. The strong mixing mechanism is located above the ammonia injection grid, and the SCR catalyst is located above the strong mixing mechanism. The smoke guide chamber has a trapezoidal structure and is located at the top of the SCR catalyst. Several through holes are evenly distributed at the bottom of the smoke guide chamber, and the smoke outlet is located at the top of the smoke guide chamber. The strong mixing mechanism includes a concentrator plate, a conical groove, a mixing box, a ventilation groove, a cooperating bearing, a small mixing box, several fixed columns, a fixed plate, a transmission box, several support columns, a first connecting shaft, a driven bevel gear, a driving bevel gear, a second connecting shaft, a motor, a protective cover, and a second release groove. The conical groove is located inside the concentrator plate, the mixing box is located at the top of the conical groove, and the ventilation groove is located at the bottom of the mixing box. The bearing is located at the top of the venting groove and inside the mixing chamber. The small mixing chamber has a cylindrical structure and is located on the inner ring of the bearing. Several fixed columns are evenly arranged along the edge of the small mixing chamber at the top. The fixed plate has a cylindrical structure and is located at the top of the fixed columns. The transmission box is located above the fixed plate. Several support columns are respectively vertically arranged at the left and rear ends of the transmission box and connected to the inner wall of the mixing chamber. Connecting shaft one is located at the top of the fixed plate and extends upward through the bottom of the transmission box. The driven bevel gear is located at the top of connecting shaft one. The driving bevel gear is located at the right end of the driven bevel gear. Connecting shaft two is located at the right end of the driving bevel gear and passes through the inner wall of the transmission box and the mixing chamber. The motor is located at the right end of connecting shaft two. The protective cover is located on the motor. The release groove two is located at the top of the mixing chamber.

[0011] Preferably, the concentrator plate has a cuboid structure, the small opening of the conical groove faces upward and the large opening faces downward, and the concentrator plate and the mixing box are integrally formed.

[0012] Preferably, the circumference of the vent groove is smaller than the circumference of the inner circumference of the bearing.

[0013] Preferably, the interior of the small mixing box is provided with several strong mixing plates, several through holes, through grooves and a release groove. The several strong mixing plates are arranged opposite each other and staggered from top to bottom on the inner wall of the small mixing box. The several through holes are evenly arranged on the front and rear side walls of each strong mixing plate. The through grooves are arranged between every two front and rear distributed through holes. The release groove is arranged on the top of the small mixing box and located between several fixed columns.

[0014] Preferably, the strong mixing plate is in lightning structure, and the length of one end of the inner wall of the small mixing box is less than that of the free end, the two rows of through holes at the front and back ends of the strong mixing plate are staggered, and each through slot is uniformly distributed in a slanting manner.

[0015] (III) Beneficial effects

[0016] The utility model provides a kind of reaction device for flue gas denitrification. With following beneficial effects:

[0017] The present application designs a strong mixing mechanism, which can concentrate and guide the flue gas and ammonia gas that have just contacted each other through the conical groove to perform preliminary mixing, and then drive the fixed plate and fixed column through the connecting shaft one by the transmission box to rotate the entire small mixing box, and then fully mix the internal mixed gas by the several strong mixing plates, greatly increase the mixing efficiency of flue gas and ammonia gas, and greatly improve the denitrification efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the front and back surface structure schematic diagram of the utility model;

[0020] Figure 3 It is the external structure schematic diagram of the strong mixing mechanism of the utility model;

[0021] Figure 4 It is the bottom structure schematic diagram of the mixing box of the utility model;

[0022] Figure 5 It is the internal structure schematic diagram of the mixing box of the utility model;

[0023] Figure 6 It is the internal and external structure schematic diagram of the small mixing box of the utility model;

[0024] Figure 7 It is the structure schematic diagram of the strong mixing plate of the utility model.

[0025] In the figure, 1 - device body; 2 - filter cavity; 3 - heating cavity; 4 - reaction cavity; 41 - ammonia injection grid; 42 - strong mixing mechanism; 421 - concentration plate; 422 - conical groove; 423 - mixing box; 424 - ventilation groove; 425 - bearing used in conjunction; 426 - small mixing box; 4261 - a plurality of strong mixing plates; 4262 - a plurality of through holes; 4263 - through groove; 4264 - release groove; 427 - a plurality of fixed columns; 428 - fixed plate; 429 - transmission box; 4210 - a plurality of support columns; 4211 - connecting shaft one; 4212 - driven umbrella gear; 4213 - driving umbrella gear; 4214 - connecting shaft two; 4215 - motor; 4216 - protective cover; 4217 - release groove two; 43 - SCR catalyst; 44 - a plurality of through holes; 45 - smoke guide cavity; 46 - smoke outlet; 5 - ammonia standby cavity; 6 - smoke inlet; 7 - a plurality of filter plates; 8 - heating device; 9 - smoke outlet; 10 - ammonia gas generating device; 11 - gas guide pipe. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-7 The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] The core is provided with an ammonia injection grid 41, a strong mixing mechanism 42, an SCR catalyst 43, a plurality of through holes 44, a smoke guide cavity 45 and a smoke outlet 46 in the reaction cavity 4. The ammonia injection grid 41 is arranged at the bottom of the reaction cavity 4 and at the left end of the air guide pipe 11. The strong mixing mechanism 42 is arranged above the ammonia injection grid 41. The SCR catalyst 43 is arranged above the strong mixing mechanism 42. The smoke guide cavity 45 is arranged in a trapezoidal structure at the top of the SCR catalyst 43. The plurality of through holes 44 are uniformly arranged at the bottom of the smoke guide cavity 45. The smoke outlet 46 is arranged at the top of the smoke guide cavity 45. The strong mixing mechanism 42 comprises a concentrating plate 421, a conical groove 422, a mixing box 423, a ventilation groove 424, a bearing 425, a small mixing box 426, a plurality of fixed columns 427, a fixed plate 428, a transmission box 429, a plurality of support columns 4210, a connecting shaft one 4211, a driven umbrella gear 4212, a driving umbrella gear 4213, a connecting shaft two 4214, a motor 4215, a protective cover 4216 and a release groove two 4217. The conical groove 422 is arranged inside the concentrating plate 421. The mixing box 423 is arranged at the top of the conical groove 422. The ventilation groove 424 is arranged at the bottom of the mixing box 423. The bearing 425 is arranged at the top of the ventilation groove 424 and inside the mixing box 423. The small mixing box 426 is arranged in a cylindrical structure on the inner ring of the bearing 425. The plurality of fixed columns 427 are uniformly arranged at the top of the small mixing box 426 along the edge of the small mixing box 426. The fixed plate 428 is arranged in a cylindrical structure at the top of the fixed columns 427. The transmission box 429 is arranged above the fixed plate 428. The plurality of support columns 4210 are vertically arranged at the left end and the rear end of the transmission box 429 respectively and connected with the inner wall of the mixing box 423. The connecting shaft one 4211 is arranged at the top of the fixed plate 428 and extends upward through the bottom of the transmission box 429. The driven umbrella gear 4212 is arranged at the top of the connecting shaft one 4211. The driving umbrella gear 4213 is arranged at the right end of the driven umbrella gear 4212. The connecting shaft two 4214 is arranged at the right end of the driving umbrella gear 4213 and passes through the inner wall of the transmission box 429 and the mixing box 423. The motor 4215 is arranged at the right end of the connecting shaft two 4214. The protective cover 4216 is arranged on the motor 4215. The release groove two 4217 is arranged at the top of the mixing box 423.

[0029] Specifically, the concentrating plate 421 is in a rectangular structure. The small opening of the conical groove 422 faces upward and the large opening faces downward. The concentrating plate 421 and the mixing box 423 are integrally formed. The circumference of the ventilation groove 424 is smaller than the inner circumference of the bearing 425.

[0030] The interior of the small mixing box 426 is provided with a plurality of strong mixing plates 4261, a plurality of through holes 4262, a through groove 4263 and a release groove one 4264. The plurality of strong mixing plates 4261 are oppositely staggered and arranged on the inner wall of the small mixing box 426 from top to bottom. The plurality of through holes 4262 are uniformly arranged on the front and rear sidewalls of each strong mixing plate 4261. The through groove 4263 is arranged between every two front and rear distributed through holes 4262. The release groove one 4264 is arranged at the top of the small mixing box 426 and between the plurality of fixing columns 427. The strong mixing plate 4261 has a lightning-shaped structure and is connected to one end of the inner wall of the small mixing box 426. The length of the connected end is less than that of the free end. The two rows of through holes 4262 at the front and rear ends of the strong mixing plate 4261 are staggered and distributed. Each through groove 4263 is uniformly distributed in a diagonal direction.

[0031] The strong mixing mechanism 42 is designed. The newly contacted flue gas and ammonia gas can be concentrated and guided by the conical groove 422 for preliminary mixing. The transmission box 429 drives the connecting shaft one 4211, the fixing plate 428 and the fixing column 427 to rotate the whole small mixing box 426. The internal mixed gas is fully mixed by the plurality of strong mixing plates 4261. The mixing efficiency of the flue gas and the ammonia gas is greatly increased. The denitration efficiency is greatly improved.

[0032] Working principle: When the device is in use, the flue gas enters the filter cavity 2 from the smoke inlet 6 and passes through the multiple layers of filter plates 7 and the heating device 8, and then is released to the reaction cavity 4 through the smoke outlet 9. At the same time, the ammonia gas prepared by the ammonia gas generating device 10 flows into the reaction cavity 4 through the gas guide pipe 11 and is released upward through the ammonia injection grid 41. At this time, the release angles of the flue gas and the ammonia gas are at right angles to facilitate mixing. Subsequently, the flue gas and the ammonia gas are compressed and guided into the mixing box 423 through the conical groove 422. Before this, the external control machine can start the motor 4215 to drive the connecting shaft two 4214 and the driving umbrella gear 4213 to rotate, thereby driving the driven umbrella gear 4212 and the connecting shaft one 4211 to rotate, and further driving the fixing plate 428, the fixing column 427 and the whole small mixing box 426 to rotate. The mixed gas comes to the small mixing box 426 through the bearing 425. The plurality of strong mixing plates 4261 rotate clockwise around the center. The mixed gas is released in a diagonal direction through each through groove 4263 while being stirred, which further disperses the mixed gas and increases the mixing efficiency. The mixed gas flows out along the release groove one 4264 and the release groove two 4217 and is released through the through hole 44 and the smoke outlet 46 under the catalysis of the SCR catalyst 43.

[0033] The utility model discloses a 1 - device body, 2 - filter cavity, 3 - heating cavity, 4 - reaction cavity, 41 - ammonia injection grid, 42 - strong mixing mechanism, 421 - concentration board, 422 - conical groove, 423 - mix box, 424 - air groove, 425 - bearing of cooperation and use, 426 - small mix box, 4261 - a plurality of strong mixing board, 4262 - a plurality of through -hole, 4263 - through groove, 4264 - release groove, 427 - a plurality of fixed column, 428 - fixed plate, 429 - transmission box, 4210 - a plurality of support column, 4211 - connecting shaft one, 4212 - driven umbrella gear, 4213 - driving umbrella gear, 4214 - connecting shaft two, 4215 - motor, 4216 - protective cover, 4217 - release groove two, 43 - SCR catalyst, 44 - a plurality of through -hole, 45 - smoke guide cavity, 46 - smoke outlet, 5 - spare ammonia cavity, 6 - smoke inlet, 7 - a plurality of filter plate, 8 - heating device, 9 - smoke outlet, 10 - ammonia gas generating device, 11 - gas guide pipe, these components are general standard parts or the components known to those skilled in the art, and the structure and principle are all known to the technical personnel and can be known through conventional experimental method, the utility model solves the problem that the existing reaction device for flue gas denitration ammonia gas mixes not enough evenly, and the NOx in partial area cannot fully contact ammonia gas, leads to that denitration reaction is not enough, thereby reduces the overall denitration efficiency. The utility model greatly increases the mixing efficiency of flue gas and ammonia gas, and greatly improves the denitration efficiency.

[0034] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments that those skilled in the art can understand.

Claims

1. A reaction device for flue gas denitration, characterized by: The utility model relates to a device for generating ammonia, which comprises a device body (1), a filtering cavity (2), a heating cavity (3), a reaction cavity (4), an ammonia preparation cavity (5), a smoke inlet (6), a plurality of filter plates (7), a heating device (8), a smoke outlet (9), an ammonia generation device (10) and a gas guide pipe (11), the filtering cavity (2), the heating cavity (3), the reaction cavity (4) and the ammonia preparation cavity (5) are sequentially arranged inside the device body (1) from left to right, the smoke inlet (6) is arranged at the bottom of the left end side wall of the device body (1), the plurality of filter plates (7) are uniformly arranged inside the filtering cavity (2), the heating device (8) is arranged inside the heating cavity (3), the smoke outlet (9) is arranged at the right end bottom of the heating device (8) and extends to the inside of the reaction cavity (4), the ammonia generation device (10) is arranged inside the ammonia preparation cavity (5), and the gas guide pipe (11) is arranged at the left end of the ammonia generation device (10) and extends to the inside of the reaction cavity (4). The reaction cavity (4) is internally provided with an ammonia injection grid (41), a strong mixing mechanism (42), an SCR catalyst (43), a plurality of through holes (44), a smoke guide cavity (45) and a smoke outlet (46). The ammonia injection grid (41) is arranged at the bottom of the reaction cavity (4) and located at the left end of the air guide pipe (11). The strong mixing mechanism (42) is arranged above the ammonia injection grid (41). The SCR catalyst (43) is arranged above the strong mixing mechanism (42). The smoke guide cavity (45) is arranged in a trapezoidal structure at the top of the SCR catalyst (43). The plurality of through holes (44) are uniformly arranged at the bottom of the smoke guide cavity (45). The smoke outlet (46) is arranged at the top of the smoke guide cavity (45). The strong mixing mechanism (42) comprises a concentrating plate (421), a conical groove (422) and a mixing box (423).The vent groove (424), the bearing (425) used in conjunction, the small mixing box (426), a plurality of fixed columns (427), the fixed plate (428), the transmission box (429), a plurality of support columns (4210), the connecting shaft one (4211), the driven umbrella gear (4212), the driving umbrella gear (4213), the connecting shaft two (4214), the motor (4215), the protective cover (4216) and the release groove two (4217), the tapered groove (422) is arranged in the inside of the centralized plate (421), the mixing box (423) is arranged at the top of the tapered groove (422), the vent groove (424) is arranged at the bottom of the mixing box (423), the bearing (425) is arranged at the top of the vent groove (424) and in the inside of the mixing box (423), the small mixing box (426) is arranged in a cylindrical structure on the inner ring of the bearing (425), a plurality of the fixed columns (427) are evenly arranged on the top of the small mixing box (426) along the edge of the small mixing box (426), the fixed plate (428) is arranged in a cylindrical structure on the top of the fixed column (427), the transmission box (429) is arranged above the fixed plate (428), a plurality of the support columns (4210) are respectively arranged vertically on the left end and the rear end of the transmission box (429) and connected with the inner wall of the mixing box (423), the connecting shaft one (4211) is arranged on the top of the fixed plate (428) and extends upward through the bottom of the transmission box (429), the driven umbrella gear (4212) is arranged on the top of the connecting shaft one (4211), the driving umbrella gear (4213) is arranged on the right end of the driven umbrella gear (4212), the connecting shaft two (4214) is arranged on the right end of the driving umbrella gear (4213) and passes through the inner wall of the transmission box (429) and the mixing box (423), the motor (4215) is arranged on the right end of the connecting shaft two (4214), the protective cover (4216) is arranged on the motor (4215), and the release groove two (4217) is arranged on the top of the mixing box (423).

2. The reaction device for flue gas denitration according to claim 1, characterized in that: The concentrating plate (421) is in the shape of a cuboid, the small opening of the tapered groove (422) faces upward, and the large opening faces downward, and the concentrating plate (421) and the mixing box (423) are integrally formed.

3. The reaction device for flue gas denitration according to claim 1, characterized in that: The circumference of the ventilation groove (424) is smaller than the inner circumference of the bearing (425).

4. The reaction device for flue gas denitration according to claim 1, characterized in that: The small mixing box (426) is internally provided with a plurality of strong mixing plates (4261), a plurality of through holes (4262), a through groove (4263) and a release groove (4264), the plurality of strong mixing plates (4261) are left-right opposite and staggered and arranged on the inner wall of the small mixing box (426) from top to bottom, the plurality of through holes (4262) are uniformly arranged on the front and rear end side walls of each strong mixing plate (4261), the through groove (4263) is arranged between every two front and rear distributed through holes (4262), and the release groove (4264) is arranged at the top of the small mixing box (426) and between the plurality of fixing columns (427).

5. The reaction device for flue gas denitration according to claim 4, characterized in that: The strong mixing plate (4261) is in the shape of lightning and is connected to one end of the inner wall of the small mixing box (426), and the length of the free end is smaller than that of the connected end, the two rows of through holes (4262) at the front and rear ends of the strong mixing plate (4261) are staggered, and each through groove (4263) is uniformly and obliquely distributed.

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