High-stability tail gas denitration reactor

Abstract

The utility model relates to the technical field of tail gas denitration reactors, in particular to a high-stability tail gas denitration reactor which comprises a denitration bin and a mixing bin, a first flow dividing pipe is installed at the end, located in the mixing bin, of the smoke inlet pipe, a second flow dividing pipe is installed at one end of the ammonia gas inlet pipe, through holes are evenly distributed in the upper face and the lower face of the flow dividing bin, a sealing ball used for blocking an opening in the end of the inner pipe is installed at the bottom end of a limiting rod, and a vertical pipe is installed on a second partition plate. When the pressure pump operates, gas located below the first partition plate is pressurized and fed into the inner pipe, mixed gas is dispersed into fine bubbles when discharged through the through holes, the bubbles gather and meet at the lower portion of the second partition plate, then the preliminarily mixed gas is mixed again, and the rotating fan blades mix the gas again. Compared with a denitration reactor with a rack, the denitration reactor has the advantages that gas mixing is more sufficient, and stable denitration is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas denitration reactors, in particular to a high-stability tail gas denitration reactor. Background Art

[0002] A large amount of flue gas containing nitrogen oxides will be generated during the production of hydrogenation catalysts. In order to prevent the emission of flue gas from leaking and causing environmental pollution, the denitrification reactor is a device for treating the flue gas during the catalyst reaction process.

[0003] A patent with announcement number CN 217511540 U discloses a tail gas denitrification reactor for the production of hydrogenation catalysts, including an air inlet box, which is connected to a reaction box, a catalyst plate is arranged inside the reaction box, the outlet ends of the ammonia pipe and the flue gas pipe both pass through the side of the air inlet box and extend to the interior of the air inlet box, a rotating shaft is arranged inside the mixing box, and after the ammonia pipe and the flue gas pipe send ammonia and flue gas into the mixing box, the mixed flow of ammonia and flue gas will drive the mixing fan blades to rotate, so that the mixed gas forms a circulation in the mixing box to enhance the mixing degree of ammonia and flue gas, thereby achieving the effect of enhancing the mixing degree of flue gas and ammonia.

[0004] However, in the existing tail gas denitrification reactor, when the flue gas and ammonia enter the mixing box at a high speed, they cannot be fully mixed and will be discharged from the connecting pipe, resulting in poor mixing effect, which makes it impossible to fully denitrify the flue gas and the flue gas denitrification stability is poor. Therefore, a high-stability tail gas denitrification reactor is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and address the problems existing in the prior art, the utility model proposes a high-stability tail gas denitration reactor.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: a high-stability tail gas denitration reactor described in the utility model comprises a denitration bin and a mixing bin; the mixing bin is arranged in an L shape, and the upper end of the mixing bin is communicated with the upper part of the denitration bin side, a smoke inlet pipe is penetrated at the end of the horizontal section of the mixing bin, a No. 1 shunt pipe is installed at the end of the smoke inlet pipe located in the mixing bin, a branch pipe is arranged horizontally on the side opposite to the smoke inlet pipe, an ammonia inlet pipe is arranged on the side of the vertical section of the mixing bin, a No. 2 shunt pipe is installed at one end of the ammonia inlet pipe, an L-shaped pipe is arranged horizontally on the side opposite to the ammonia inlet pipe, and the L-shaped pipe is penetrated in the mixing bin and located above the branch pipe, the vertical section of the L-shaped pipe is arranged vertically upward, a No. 1 partition and a No. 2 partition are arranged in parallel in the mixing bin, and the No. 1 partition is located between the No. 2 partition and the L-shaped pipe, and a No. 1 partition is installed under the No. 1 partition through a fixing piece. A pressure pump, an inner tube is installed at the working end of the pressure pump, and the other end of the inner tube is vertically penetrated and arranged on No. 1 partition, an outer tube is installed on the No. 1 partition, and the outer tube is located outside the inner tube, a diversion bin is installed on the upper end of the outer tube, and through holes are evenly distributed on the upper and lower sides of the diversion bin, a No. 1 support plate is horizontally installed in the outer tube, a hole is passed through the No. 1 support plate, a limit rod is passed through the hole, a sealing ball for sealing the end opening of the inner tube is installed at the bottom end of the limit rod, a spring is sleeved on the outer side of the limit rod, and the spring is located between the No. 1 support plate and the sealing ball, a riser is installed on the No. 2 partition, a No. 2 support plate is horizontally installed in the riser, a rotating shaft is rotatably installed under the No. 2 support plate, and fan blades are installed on the rotating shaft, which cooperate to achieve the effect of fully mixing the gas. Compared with the denitration reactor with a rack, the gas mixing is more sufficient, which effectively ensures the stable progress of denitration and improves the working stability of the device.

[0007] Preferably, the No. 1 diversion pipe and the smoke inlet pipe are perpendicular to each other, and the branch pipe and the No. 1 diversion pipe are perpendicular to each other, so that the effect of smoke diversion is achieved and the gas mixing effect is improved.

[0008] Preferably, the branch pipes are parallel to each other and are arranged horizontally, so as to cooperate to achieve the effect of accurate flow diversion.

[0009] Preferably, a baffle is installed on the top of the limiting rod, and the baffle is located on the No. 1 support plate, and the cooperation achieves the limiting effect to ensure the movement stability of the sealing ball.

[0010] Preferably, the limit rod and the No. 1 support plate are perpendicular to each other, and pure water is poured between the No. 1 partition plate and the No. 2 partition plate, which cooperates to achieve the effect of improving the gas mixing effect and ensure the uniformity of gas mixing.

[0011] Preferably, the denitrification bin is connected to the mixing bin and is vertically arranged with an arc-shaped guide plate installed therein, a catalyst plate is arranged in the denitrification bin, an exhaust port is arranged at the lower part of the denitrification bin, and beveled edges are arranged at the upper corners opposite to the mixing bin, which cooperate to achieve a guiding effect and improve the denitrification stability.

[0012] The utility model is beneficial in that:

[0013] 1. When the utility model is transported into the No. 1 diversion pipe through the flue gas, it will be diverted by the transversely arranged branch pipes and discharged into the mixing chamber. At the same time, after the ammonia enters the No. 2 diversion pipe, it will be diverted into the mixing chamber by the transversely arranged L-shaped pipes. When the pressure pump is running, the gas under the No. 1 partition will be pressurized and sent into the inner tube. When the mixed gas is discharged through the through hole, it will be dispersed into tiny bubbles. The bubbles will gather and meet at the bottom of the No. 2 partition, and then the preliminary mixed gas will be mixed again. The rotating fan blades will mix the gas again, and the gas will be fully mixed. Compared with the rack denitrification reactor, the gas mixing is more sufficient, which effectively ensures the stable progress of denitrification and improves the working stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 is a schematic diagram of a first three-dimensional structure;

[0016] Figure 2 is a cutaway enlarged schematic diagram of the first three-dimensional structure;

[0017] Figure 3 This is an enlarged schematic diagram of the main structure of the mixing bin;

[0018] Figure 4 It is a cross-sectional enlarged schematic diagram of the main structure of the hybrid component;

[0019] Figure 5 It is an enlarged schematic diagram of area A in the cross-section diagram of the main structure of the hybrid component;

[0020] Figure 6 This is an enlarged schematic diagram of area B in the cross-section diagram of the main structure of the hybrid component.

[0021] In the figure: 1. Denitrification chamber; 2. Mixing chamber; 3. Smoke inlet pipe; 4. No. 1 diverter pipe; 5. Branch pipe; 6. Ammonia inlet pipe; 7. No. 2 diverter pipe; 8. L-shaped pipe; 9. No. 1 partition plate; 10. No. 2 partition plate; 11. Booster pump; 12. Inner pipe; 13. Outer pipe; 14. Diverter chamber; 15. Through hole; 16. No. 1 support plate; 17. Limit rod; 18. Sealing ball; 19. Spring; 20. Baffle; 21. Vertical pipe; 22. No. 2 support plate; 23. Rotating shaft; 24. Fan blade; 25. Arc guide plate; 26. Bevel edge; 27. Catalyst plate; 28. Exhaust port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-6As shown, a high-stability tail gas denitration reactor comprises a denitration bin 1 and a mixing bin 2; the mixing bin 2 is arranged in an L shape, and the upper end of the mixing bin 2 is communicated with the upper part of the side of the denitration bin 1, a smoke inlet pipe 3 is arranged through the end of the horizontal section of the mixing bin 2, and a No. 1 shunt pipe 4 is installed at the end of the smoke inlet pipe 3 located in the mixing bin 2, and a branch pipe 5 is arranged horizontally on the side opposite to the smoke inlet pipe 3 of the No. 1 shunt pipe 4, and a branch pipe 5 is arranged horizontally on the side of the vertical section of the mixing bin 2, and a No. 2 shunt pipe 7 is installed at one end of the ammonia inlet pipe 6, and an L-shaped pipe 8 is arranged horizontally on the side opposite to the ammonia inlet pipe 6 of the No. 2 shunt pipe 7, and an L-shaped pipe 8 is arranged horizontally on the side of the No. 2 shunt pipe 7 opposite to the ammonia inlet pipe 6, and the L-shaped pipe 8 is arranged horizontally on the side of the L-shaped pipe 8. The mixing chamber 2 is provided with a first partition plate 9 and a second partition plate 10 in parallel in the mixing chamber 2, and the first partition plate 9 is located between the second partition plate 10 and the L-shaped tube 8. A pressure pump 11 is installed under the first partition plate 9 through a fixing member, and an inner tube 12 is installed at the active end of the pressure pump 11, and the other end of the inner tube 12 is vertically penetrated on the first partition plate 9, an outer tube 13 is installed on the first partition plate 9, and the outer tube 13 is located outside the inner tube 12, a diversion chamber 14 is installed on the upper end of the outer tube 13, and the diversion chamber 14 is evenly distributed with passages installed on the upper and lower sides. Hole 15, a No. 1 support plate 16 is horizontally installed in the outer tube 13, a hole is opened on the No. 1 support plate 16, a limit rod 17 is arranged in the hole, a sealing ball 18 for blocking the opening of the end of the inner tube 12 is installed at the bottom of the limit rod 17, a spring 19 is sleeved on the outer side of the limit rod 17, and the spring 19 is located between the No. 1 support plate 16 and the sealing ball 18, a vertical pipe 21 is installed on the No. 2 partition plate 10, a No. 2 support plate 22 is horizontally installed in the vertical pipe 21, a rotating shaft 23 is rotatably installed under the No. 2 support plate 22, a fan blade 24 is installed on the rotating shaft 23, the No. 1 diversion pipe 4 and the smoke inlet pipe 3 are perpendicular to each other, the branch pipe 5 is perpendicular to the first shunt pipe 4, the branch pipes 5 are parallel to each other, the branch pipes 5 are horizontally arranged, a baffle 20 is installed on the top of the limit rod 17, and the baffle 20 is located on the first support plate 16, the limit rod 17 and the first support plate 16 are perpendicular to each other, pure water is poured between the first partition plate 9 and the second partition plate 10, the denitration bin 1 is connected to the mixing bin 2 and is vertically arranged and is equipped with an arc guide plate 25, a catalyst plate 27 is arranged in the denitration bin 1, an exhaust port 28 is arranged at the lower part of the denitration bin 1, and a bevel 26 is arranged at the upper corners of the denitration bin 1 and the mixing bin 2.

[0024] During operation, since the flue gas and ammonia in the existing tail gas denitration reactor cannot be fully mixed when entering the mixing box at a fast speed, they will be discharged from the connecting pipe, resulting in poor mixing effect, which makes it impossible to fully denitrate the flue gas, and the flue gas denitration stability is poor. In this scheme, in the initial state, the spring 19 will always push the sealing ball 18 downward, so that the sealing ball 18 is sealed in the opening at the upper end of the inner tube 12, and then the opening at the upper end of the inner tube 12 is closed to prevent pure water from flowing into the inner tube 12. When in use, the flue gas pipeline generated during production is connected to the smoke inlet pipe 3, and the ammonia delivery pipeline is connected to the ammonia inlet pipe 6, and the flue gas is delivered into the first branch pipe When the flue gas is in the No. 1 pipe 4, it will be diverted by the transversely arranged branch pipe 5 and discharged into the mixing chamber 2. At the same time, after the ammonia enters the No. 2 diversion pipe 7, it will be diverted by the transversely arranged L-shaped pipe 8 and enter the mixing chamber 2. The flue gas will flow upward after entering the bottom of the mixing chamber 2. At this time, the flue gas flowing upward will meet the ammonia gas for preliminary mixing. By controlling the operation of the booster pump 11, the booster pump 11 will pressurize the gas under the No. 1 partition 9 and send it into the inner pipe 12. As the booster pump 11 continues to operate, the pressure in the inner pipe 12 will continue to increase. When the pressure in the inner pipe 12 is greater than the downward pushing force of the spring 19, the sealing ball 18 will be removed from the inner pipe 12. A gap is opened at the top of the top, at this time, the preliminary mixture of flue gas and ammonia will enter the outer tube 13 through the gap between the sealing ball 18 and the opening of the inner tube 12, and the mixed gas will enter the diversion chamber 14 after entering the outer tube 13, and with the continuous pumping of the pressure pump 11, the gas in the diversion chamber 14 will continue to increase, and the gas will be discharged from the diversion chamber 14 through the through hole 15, and pure water is poured between the No. 1 partition 9 and the No. 2 partition 10. When the mixed gas is discharged through the through hole 15, it will be dispersed into small bubbles, and the bubbles will gather and meet at the bottom of the No. 2 partition 10, and then the preliminary mixed gas will be mixed again, and the gas will gather under the No. 2 partition 10. It will go upward into the riser 21, and with the continuous delivery of gas, the airflow will blow the fan blades 24 to rotate, and then the gas will be mixed again through the rotating fan blades 24, and the mixed gas will enter the mixing chamber 2 through the connection between the denitrification chamber 1 and the mixing chamber 2, and after the gas enters the denitrification chamber 1, it will be guided by the vertically arranged arc-shaped guide plate 25 to blow toward the catalyst plate 27, and under the action of the bevel 26, it is ensured that the airflow can accurately pass through the catalyst plate 27, so as to achieve the effect of sufficient mixing of the gas. Compared with the rack denitrification reactor, the gas mixing is more sufficient, which effectively ensures the stable progress of denitrification and improves the working stability of the device.

[0025] Working principle: in the initial state, the spring 19 will always push the sealing ball 18 downward, so that the sealing ball 18 is blocked in the opening at the upper end of the inner tube 12, and then the opening at the upper end of the inner tube 12 is closed to prevent pure water from flowing into the inner tube 12. When in use, the flue gas pipeline generated during production is connected to the flue gas inlet pipe 3, and the ammonia delivery pipeline is connected to the ammonia inlet pipe 6. When the flue gas is delivered into the No. 1 diversion pipe 4, it will be diverted by the transversely arranged branch pipes 5 and discharged into the mixing chamber 2. At the same time, after the ammonia enters the No. 2 diversion pipe 7, it will be diverted by the transversely arranged L-shaped pipes 8 into the mixing chamber. The flue gas will flow upward after entering the bottom of the mixing chamber 2. At this time, the flue gas flowing upward will meet the ammonia gas for preliminary mixing. By controlling the operation of the booster pump 11, the booster pump 11 will pressurize the gas under the No. 1 partition plate 9 and send it into the inner tube 12. As the booster pump 11 continues to operate, the pressure in the inner tube 12 will continue to increase. When the pressure in the inner tube 12 is greater than the downward pushing force of the spring 19, the sealing ball 18 will be pushed open from the upper part of the inner tube 12. At this time, the preliminary mixture of flue gas and ammonia will pass through the gap between the sealing ball 18 and the opening of the inner tube 12. The mixed gas enters the outer tube 13 through the gap, and the mixed gas enters the diversion chamber 14 after entering the outer tube 13. With the continuous pumping of the pressure pump 11, the gas in the diversion chamber 14 will continue to increase, and the gas will be discharged from the diversion chamber 14 through the through hole 15. Pure water is poured between the No. 1 partition 9 and the No. 2 partition 10. When the mixed gas is discharged through the through hole 15, it will be dispersed into fine bubbles. The bubbles will gather and meet at the bottom of the No. 2 partition 10, and then the preliminary mixed gas will be mixed again. When the gas gathers under the No. 2 partition 10, it will enter the riser 21 upward, and with the continuous During transportation, the airflow will drive the fan blades 24 to rotate, and then the rotating fan blades 24 will mix the gas again. The mixed gas will enter the mixing chamber 2 through the connection between the denitrification chamber 1 and the mixing chamber 2, and after entering the denitrification chamber 1, the gas will be guided by the vertically arranged arc-shaped guide plates 25 to be blown toward the catalyst plate 27, and the bevel 26 can ensure that the airflow can accurately pass through the catalyst plate 27, so as to achieve the effect of sufficient mixing of the gas. Compared with the rack denitrification reactor, the gas mixing is more sufficient, which effectively ensures the stable progress of denitrification and improves the working stability of the device.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high stability tail gas denitration reactor, characterized in that: The invention comprises a denitration bin (1) and a mixing bin (2); the mixing bin (2) is arranged in an L shape, and the upper end of the mixing bin (2) is communicated with the upper part of the side of the denitration bin (1); a smoke inlet pipe (3) is provided through the end of the horizontal section of the mixing bin (2); a first shunt pipe (4) is installed at the end of the smoke inlet pipe (3) located in the mixing bin (2); a branch pipe (5) is installed on the side of the first shunt pipe (4) opposite to the smoke inlet pipe (3) in a horizontal arrangement; an ammonia inlet pipe (6) is provided on the side of the vertical section of the mixing bin (2); two ammonia inlet pipes (6) are installed at one end of the ammonia inlet pipe (6); A No. 1 shunt pipe (7) is provided, and an L-shaped pipe (8) is installed in a transverse arrangement on the side of the No. 2 shunt pipe (7) opposite to the ammonia inlet pipe (6), and the L-shaped pipe (8) is arranged to penetrate the mixing chamber (2) and is located above the branch pipe (5), and the vertical section of the L-shaped pipe (8) is arranged vertically upward, and a No. 1 baffle (9) and a No. 2 baffle (10) are arranged in parallel in the mixing chamber (2), and the No. 1 baffle (9) is located between the No. 2 baffle (10) and the L-shaped pipe (8), and a pressure pump (11) is installed under the No. 1 baffle (9) through a fixing member, and the ... An inner tube (12) is installed at the action end of the pressure pump (11), and the other end of the inner tube (12) is vertically penetrated and arranged on a No. 1 partition (9), an outer tube (13) is installed on the No. 1 partition (9), and the outer tube (13) is located outside the inner tube (12), a diversion bin (14) is installed at the upper end of the outer tube (13), and through holes (15) are evenly distributed on the upper and lower surfaces of the diversion bin (14), and a No. 1 support plate (16) is horizontally installed in the outer tube (13), and a hole is opened on the No. 1 support plate (16), and a hole is penetrated and arranged in the hole. A limiting rod (17), a sealing ball (18) for sealing the end opening of the inner tube (12) is installed at the bottom end of the limiting rod (17), a spring (19) is sleeved on the outer side of the limiting rod (17), and the spring (19) is located between the first support plate (16) and the sealing ball (18), a vertical pipe (21) is installed on the second partition plate (10), a second support plate (22) is horizontally installed in the vertical pipe (21), a rotating shaft (23) is rotatably installed under the second support plate (22), and a fan blade (24) is installed on the rotating shaft (23).

2. A high stability tail gas denitration reactor according to claim 1, characterized in that: The first diversion pipe (4) and the smoke inlet pipe (3) are perpendicular to each other, and the branch pipe (5) and the first diversion pipe (4) are perpendicular to each other.

3. The high stability tail gas denitration reactor according to claim 1, characterized in that: The branch pipes (5) are parallel to each other and are arranged horizontally.

4. A high stability tail gas denitration reactor according to claim 1, characterized in that: A baffle plate (20) is installed on the top end of the limiting rod (17), and the baffle plate (20) is located on the first supporting plate (16).

5. The high stability tail gas denitration reactor according to claim 1, characterized in that: The limiting rod (17) and the first supporting plate (16) are perpendicular to each other, and pure water is poured between the first partition plate (9) and the second partition plate (10).

6. A high stability tail gas denitration reactor according to claim 1, characterized in that: The denitration bin (1) is connected to the mixing bin (2) and is vertically arranged with an arc-shaped guide plate (25). A catalyst plate (27) is arranged in the denitration bin (1). An exhaust port (28) is arranged at the lower part of the denitration bin (1). The upper corners of the denitration bin (1) and the mixing bin (2) opposite to each other are provided with bevel edges (26).

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