Catalyst replacement device for denitration system

Abstract

The utility model relates to a catalyst replacement device for a denitration system, which comprises a feed delivery pipe communicated with a smoke delivery pipe of the denitration system, a sealing valve A, a sealing valve B, a sealing valve C and a sealing valve D which are sequentially arranged along the axial direction of the feed delivery pipe are arranged in the feed delivery pipe, a feed bin is formed between the sealing valve A and the sealing valve B, and a storage bin is formed between the sealing valve B and the sealing valve C; a discharging bin is formed between the sealing valve C and the sealing valve D; the smoke conveying pipe is communicated with the storage bin; a conveying mechanism which extends in the axial direction of the conveying pipe and sequentially penetrates through the feeding bin, the storage bin and the discharging bin is arranged in the conveying pipe, and a catalyst module is arranged on the conveying mechanism; the catalyst is replaced through the sealing valve A, the sealing valve B, the sealing valve C, the sealing valve D, the sealing valve A, the sealing valve B and the transmission mechanism in a sealing state, the time for replacing the catalyst is shortened, the denitration efficiency is improved, and the device is simple, efficient, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, in particular to a catalyst replacement device for a denitration system. Background Art

[0002] A denitration catalyst refers to a substance that promotes a reducing agent (such as ammonia water or urea) to selectively react with nitrogen oxides in flue gas at a certain temperature in the SCR reaction, thereby converting them into harmless nitrogen and water vapor. It is a key technical component for reducing the emission of nitrogen oxides (NOx) in flue gas.

[0003] In existing denitration systems, catalyst modules are usually adopted. Since they need to undergo chemical reactions with a large amount of nitrogen oxides for a long time, a large amount of catalyst is required, resulting in a relatively large volume of the catalyst module. Therefore, when installing the catalyst module, forklifts, slings or other special equipment are often used for feeding, which takes a lot of time and affects the denitration efficiency. Moreover, mistakes are likely to occur during the feeding process, damaging the equipment and further affecting the denitration efficiency. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a catalyst replacement device for a denitration system, which replaces the catalyst in a sealed state through a sealing valve A, a sealing valve B, a sealing valve C and a sealing valve D, the sealing valve A, the sealing valve B and a transmission mechanism, reduces the time for replacing the catalyst, improves the denitration efficiency, and is simple, efficient, safe, reliable and convenient to operate.

[0005] The utility model is realized through the following technical solutions. A catalyst replacement device for a denitration system is provided, which includes a feed pipe connected to the flue gas transmission pipe of the denitration system. In the feed pipe, there are a sealing valve A, a sealing valve B, a sealing valve C and a sealing valve D arranged in sequence along the axial direction of the feed pipe. An inlet bin is formed between the sealing valve A and the sealing valve B, a material placement bin is formed between the sealing valve B and the sealing valve C, and a discharge bin is formed between the sealing valve C and the sealing valve D. The flue gas transmission pipe is connected to the material placement bin. In the feed pipe, there is a transmission mechanism extending along the axial direction of the feed pipe and sequentially passing through the inlet bin, the material placement bin and the discharge bin. A catalyst module is arranged on the transmission mechanism. Through the sealing valve A, the sealing valve B, the sealing valve C and the sealing valve D, the sealing valve A, the sealing valve B and the transmission mechanism replace the catalyst in a sealed state, reduce the time for replacing the catalyst, and improve the denitration efficiency.

[0006] As an optimization, the catalyst module includes a sealed box with the catalyst located inside. The sealed box is provided with smoke vents on both sides facing the smoke conveying pipe. The inner wall of the material storage bin is provided with a chute that extends along the axial direction of the smoke conveying pipe towards the catalyst module and surrounds the smoke conveying pipe. A sealing plug that extends along the extension direction of the chute is arranged in the chute. The projection of the sealing plug and the sealed box along the axial direction of the smoke conveying pipe overlaps, and the projection of the smoke vent along the axial direction of the smoke conveying pipe is located in the middle of the sealing plug. An electric push rod for driving the sealing plug to slide along the axial direction of the smoke conveying pipe is arranged on the material conveying pipe. The sealing plug is used for sealing between the catalyst module and the material storage bin to prevent the smoke from being directly discharged without passing through the catalyst module.

[0007] As an optimization, the transmission mechanism includes rollers rotatably arranged in the material conveying pipe and arranged in sequence along the axial direction of the material conveying pipe, and a driving mechanism for driving the rollers to rotate. The rollers extend in the horizontal direction and are perpendicular to the axis of the material conveying pipe. There are sealing valves A, B, C, and D. Sealing valves A and B are respectively located between adjacent rollers. The rollers are used to prevent the transmission mechanism from affecting the sealing performance of sealing valves A, B, C, and D.

[0008] As an optimization, the rollers include roller B rotatably arranged in the feeding bin, roller C rotatably arranged in the material storage bin, and roller D rotatably arranged in the discharging bin. The driving mechanism includes motor A for driving roller B to rotate, motor B for driving roller C to rotate, and motor C for driving roller D to rotate. By connecting roller B, roller C, and roller D to motor A, motor B, and motor C respectively, it is ensured that there is no mutual influence when the catalyst module is transported to the feeding bin, the material storage bin, and the discharging bin respectively.

[0009] As an optimization, the rollers further include roller A and roller E. Roller A is rotatably arranged on the side of sealing valve A away from sealing valve B and is connected to motor A. Roller E is rotatably arranged on the side of sealing valve D away from sealing valve C and is connected to motor C. Roller A and roller E facilitate the feeding and discharging of the catalyst module into the material conveying pipe, improving the safety of transporting the catalyst module.

[0010] As an optimization, the feeding bin and the discharging bin are respectively connected to the input end of the smoke conveying pipe through air pumps. The air pumps are used to convey the smoke in the feeding bin and the discharging bin to the input end of the smoke conveying pipe to prevent the smoke from being discharged through the feeding bin and the discharging bin.

[0011] The beneficial effects of the present utility model are as follows: Through the sealing valves A, B, C, and D, the catalyst can be replaced under a sealed state by the sealing valves A, B, and the transmission mechanism, reducing the time for catalyst replacement and improving the denitration efficiency; an electric push rod for driving the sealing plug to slide axially along the smoke transmission pipe is provided on the material conveying pipe; the sealing plug is used for sealing the catalyst module and the material storage bin to prevent the flue gas from directly discharging without passing through the catalyst module; rollers are used to prevent the transmission mechanism from affecting the sealing performance of the sealing valves A, B, C, and D; the rollers B, C, and D are respectively connected to the motors A, B, and C to ensure that the transportation of the catalyst module to the feeding bin, the material storage bin, and the discharging bin is not affected by each other; the rollers A and E facilitate the transportation and discharge of the catalyst module to the material conveying pipe, increasing the safety of the catalyst module transportation; the air pump is used to convey the flue gas in the feeding bin and the discharging bin to the input end of the smoke transmission pipe to prevent the flue gas from discharging through the feeding bin and the discharging bin. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the internal structure of the present utility model;

[0013] Figure 2 It is a sectional view (front view) of the present utility model;

[0014] Figure 3 It is the front view of the present utility model;

[0015] Figure 4 It is a sectional view (top view) of the present utility model;

[0016] Figure 5 It is Figure 4 the schematic diagram of the structure at position A of

[0017] Figure 6 It is a schematic diagram of the structure of the present utility model;

[0018] As shown in the figure:

[0019] 1. Smoke transmission pipe, 2. Material conveying pipe, 3. Sealing valve A, 4. Sealing valve B, 5. Sealing valve C, 6. Sealing valve D, 7. Transmission mechanism, 8. Bracket, 9. Catalyst module, 10. Chute, 11. Sealing plug, 12. Electric push rod, 13. Air pump, 14. Proximity sensor, 201. Feeding bin, 202. Material storage bin, 203. Discharging bin, 701. Roller, 702. Driving mechanism, 901. Sealing box, 902. Smoke passage, 903. Catalyst, 7011. Roller A, 7012. Roller B, 7013. Roller C, 7014. Roller D, 7015. Roller E, 7021. Motor A, 7022. Motor B, 7023. Motor C, 7024. Transmission mechanism A, 7025. Transmission mechanism B, 7026. Transmission mechanism C. Detailed Embodiment

[0020] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0021] As Figure 1 and Figure 2 shown, the catalyst replacement device for the denitration system of the present utility model includes a feeding pipe 2 communicating with the flue gas conveying pipe 1 of the denitration system. In the feeding pipe 2, there are a sealing valve A 3, a sealing valve B 4, a sealing valve C 5, and a sealing valve D 6 arranged in sequence along the axial direction of the feeding pipe 2. An inlet bin 201 is formed between the sealing valve A 3 and the sealing valve B 4, a material placement bin 202 is formed between the sealing valve B 4 and the sealing valve C 5, and a discharging bin 203 is formed between the sealing valve C 5 and the sealing valve D 6; the flue gas conveying pipe 1 communicates with the material placement bin 202; in the feeding pipe 2, there is a transmission mechanism 7 extending along the axial direction of the feeding pipe 2 and sequentially passing through the inlet bin 201, the material placement bin 202, and the discharging bin 203. A catalyst module 9 is provided on the transmission mechanism 7; the flue gas conveying pipe 1 and the feeding pipe 2 extend in the horizontal direction, and the flue gas conveying pipe 1 includes a flue gas input end and an output end; in the feeding pipe 2, there are sliding rails respectively adapted to the sealing valve A 3, the sealing valve B 4, the sealing valve C 5, and the sealing valve D 6. The sealing valve A 3, the sealing valve B 4, the sealing valve C 5, and the sealing valve D 6 are respectively slidably arranged on the corresponding sliding rails. On the feeding pipe 2, there is a mechanism for driving the sealing valve A 3, the sealing valve B 4, the sealing valve C 5, and the sealing valve D 6 to slide along the corresponding sliding rails; the sealing valve A 3, the sealing valve B 4, the sealing valve C 5, and the sealing valve D 6 can be driven by means such as an electric push rod 12, a crane, a gear and rack, etc.; the inlet bin 201, the material placement bin 202, and the discharging bin 203 are sealed cabins.

[0022] Open the sealing valve A 3, close the sealing valve B 4, the sealing valve C 5, and the sealing valve D 6, and place the catalyst module 9 on the transmission mechanism 7 in the inlet bin 201; close the sealing valve A 3 and open the sealing valve B 4, the sealing valve C 5, and the transmission mechanism 7. The transmission mechanism 7 drives the catalyst module 9 into the material placement bin 202, and the existing catalyst module 9 in the material placement bin 202 enters the discharging bin 203. Then close the sealing valve B 4, the sealing valve C 5, and the transmission mechanism 7; open the sealing valve D 6 and take out the catalyst module 9 in the discharging bin 203.

[0023] As Figure 1 , Figure 2 , Figure 4 and Figure 5The catalyst module 9 shown includes a sealed box 901, with a catalyst 903 located inside the sealed box 901. The sealed box 901 is provided with smoke passage openings 902 on both sides facing the smoke transmission pipe 1; the inner wall of the material placement bin 202 is provided with a chute 10 extending along the axial direction of the smoke transmission pipe 1 towards the catalyst module 9 and surrounding the smoke transmission pipe 1. A sealing plug 11 extending along the extension direction of the chute 10 is arranged in the chute 10. The projections of the sealing plug 11 and the sealed box 901 along the axial direction of the smoke transmission pipe 1 overlap, and the projection of the smoke passage opening 902 along the axial direction of the smoke transmission pipe 1 is located in the middle of the sealing plug 11; an electric push rod 12 for driving the sealing plug 11 to slide along the axial direction of the smoke transmission pipe 1 is arranged on the material transmission pipe 2; the main body of the electric push rod 12 is fixedly connected to the material transmission pipe 2, and the push rod end of the electric push rod 12 is fixedly connected to the sealing plug 11.

[0024] Start the electric push rod 12. The electric push rod 12 drives the sealing plug 11 to move towards the catalyst module 9 along the chute 10 until the sealing plug 11 contacts the sealed box 901, and the sealing plug 11 is sealingly connected to the sealed box 901.

[0025] As Figure 1 、 Figure 2 、 Figure 3 And Figure 4 As shown in

[0026] The transmission mechanism 7 includes rollers 701 rotatably arranged in the material transmission pipe 2 and arranged in sequence along the axial direction of the material transmission pipe 2, and a driving mechanism 702 for driving the rollers 701 to rotate; the rollers 701 extend in the horizontal direction and are perpendicular to the axis of the material transmission pipe 2. There are sealing valves A3, B4, C5, and D6, and the sealing valves A3 and B4 are respectively located between adjacent rollers 701.

[0026] The catalyst module 9 is placed on the rollers 701. Start the driving mechanism 702, and the driving mechanism 702 drives the rollers 701 to rotate, and the rollers 701 drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7.

[0027] As Figure 1 、 Figure 2 、 Figure 3 And Figure 4 As shown in

[0028] The catalyst module 9 is placed on the roller B7012. Start the motor A7021 and the motor B7022. The motor A7021 drives the roller B7012 to rotate, and the motor B7022 drives the roller C7013 to rotate. The roller B7012 and the roller C7013 drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 disengages from the feeding bin 201 and completely enters the material placing bin 202. Start the motor B7022 and the motor C7023. The motor B7022 drives the roller C7013 to rotate, and the motor C7023 drives the roller D7014 to rotate. The roller C7013 and the roller D7014 drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 disengages from the material placing bin 202 and completely enters the discharging bin 203.

[0029] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the roller 701 further includes a roller A7011 and a roller E7015. The roller A7011 is rotatably arranged on the side of the sealing valve A3 away from the sealing valve B4 and is connected to the motor A7021. The roller E7015 is rotatably arranged on the side of the sealing valve D6 away from the sealing valve C5 and is connected to the motor C7023. It further includes a bracket 8 fixedly connected to the material conveying pipe 2. The roller A7011 and the roller E7015 are rotatably arranged on the bracket 8. The diameters of the roller A7011, the roller B7012, the roller C7013, the roller D7014, and the roller E7015 are the same and their axes are located at the same horizontal position. The roller A7011 and the roller B7012 are connected to the motor A7021 through a transmission mechanism A7024. The transmission mechanism A7024 includes a driven wheel A fixedly connected coaxially to the roller A7011 and the roller B7012 respectively. The driven wheel A is connected to a driving wheel A through a transmission belt A. The driving wheel A is fixedly connected coaxially to the output end of the motor A7021. The roller C7013 is connected to the motor B7022 through a transmission mechanism B7025. The transmission mechanism B7025 includes a driven wheel B fixedly connected coaxially to the roller C7013. The driven wheel B is connected to a driving wheel B through a transmission belt B. The driving wheel B is fixedly connected coaxially to the output end of the motor B7022. The roller D7014 and the roller E7015 are connected to the motor C7023 through a transmission mechanism C7026. The transmission mechanism C7026 includes a driven wheel C fixedly connected coaxially to the roller D7014 and the roller E7015 respectively. The driven wheel C is connected to a driving wheel C through a transmission belt C. The driving wheel C is fixedly connected coaxially to the output end of the motor C7023.

[0030] The catalyst module 9 is placed on the drum A7011. Open the sealing valve A3 and start the motor A7021. The motor A7021 drives the drums A7011 and B7012 to rotate. The drums A7011 and B7012 drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 completely enters the feed bin 201, and then the sealing valve A3 and the motor A7021 are closed. Open the sealing valve D6 and start the motor C7023. The motor C7023 drives the drums D7014 and E7015 to rotate. The drums D7014 and E drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 completely disengages from the discharge bin 203, and then the sealing valve D6 and the motor C7023 are closed.

[0031] As Figure 3 and Figure 6 shown, the feed bin 201 and the discharge bin 203 are respectively connected to the input end of the smoke transmission pipe 1 through the air pump 13. The air pump 13 is a prior art and a vacuum pump can be used.

[0032] With the sealing valves A3, B4, C5 and D6 closed, start the air pump 13. The air pump 13 evacuates the flue gas in the feed bin 201 and the discharge bin 203 and transports it to the input end of the smoke transmission pipe 1.

[0033] As Figure 1 and Figure 2 shown, a proximity sensor 14 with its detection end facing the inside of the material placement bin 202 can be provided on one side of the material placement bin 202 close to the sealing valve B4. The movement trajectory of the catalyst module 9 intersects the detection area of the proximity sensor 14. The axis of the proximity sensor 14 is perpendicular to the axis of the material transmission pipe 2, and the proximity sensor 14 is connected to the motor B7022.

[0034] Start the transmission mechanism 7. The catalyst module 9 moves along the transmission direction of the transmission mechanism 7. When the proximity sensor 14 detects that the catalyst module 9 enters the detection area, the transmission mechanism 7 continues to operate until the proximity sensor 14 detects that the catalyst module 9 leaves the detection area. When the catalyst module 9 reaches the designated position, the motor B7022 stops working, the drum stops rotating, and the catalyst module 9 stays at the designated position in the material placement bin 202.

[0035] During the actual production process, the catalyst module 9 is placed on the drum A7011. Open the sealing valve A3 and start the motor A7021. The sealing valves B4, C5 and D6 are closed. The motor A7021 drives the drums A7011 and B7012 to rotate. The drums A7011 and B7012 drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 completely enters the feed bin 201, then close the sealing valve A3 and open the sealing valve B4. The drum B7012 drives the catalyst module 9 to continue moving along the transmission direction of the transmission mechanism 7.

[0036] Start the electric push rod 12. The electric push rod 12 drives the sealing plug 11 to move along the chute 10 in a direction away from the original catalyst module 9 in the material placing bin 202 until the sealing plug 11 disengages from the sealing box 901 of the original catalyst module 9.

[0037] Open the sealing valve C5, the motor B7022 and the motor C7023. The motor B7022 drives the roller C7013 to rotate, and the motor C7023 drives the roller D7014 to rotate. The roller C7013 and the roller D7014 drive the original catalyst module 9 in the material placing bin 202 to move along the transmission direction of the transmission mechanism 7; until the catalyst module 9 in the feed bin 201 disengages from the feed bin 201 and completely enters the designated position in the material placing bin 202, and at the same time the original catalyst module 9 in the material placing bin 202 disengages from the material placing bin 202 and completely enters the discharge bin 203; the sealing valve B4 and the sealing valve C5 are closed and the motor A7021, the motor B7022 and the motor C7023 stop working, and the rollers B7012, C7013 and D7014 stop rotating.

[0038] Start the electric push rod 12. The electric push rod 12 drives the sealing plug 11 to move along the chute 10 towards the catalyst module 9 until the sealing plug 11 contacts the sealing box 901 and the sealing plug 11 is sealingly connected to the sealing box 901.

[0039] Start the air pump 13. The air pump 13 evacuates the flue gas in the feed bin 201 and the discharge bin 203 and transports it to the input end of the smoke transmission pipe 1 until the flue gas in the feed bin 201 and the discharge bin 203 is completely evacuated, and then the air pump 13 is closed.

[0040] Open the sealing valve D6 and start the motor C7023. The motor C7023 drives the roller D7014 and the roller E7015 to rotate. The roller D7014 and the roller E drive the catalyst module 9 to move along the transmission direction of the transmission mechanism 7 until the catalyst module 9 completely disengages from the discharge bin 203, and then the sealing valve D6 and the motor C7023 are closed.

[0041] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted the prior art, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solution of the present utility model and are not a limitation to the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of the claims of the present utility model.

Claims

1. A catalyst replacement device for a denitration system, characterized in that: The invention comprises a conveying pipe (2) connected to a smoke conveying pipe (1) of a denitration system, wherein a sealing valve A (3), a sealing valve B (4), a sealing valve C (5) and a sealing valve D (6) are arranged in sequence along the axial direction of the conveying pipe (2), a feed bin (201) is formed between the sealing valve A (3) and the sealing valve B (4), a storage bin (202) is formed between the sealing valve B (4) and the sealing valve C (5), and a discharge bin (203) is formed between the sealing valve C (5) and the sealing valve D (6); the smoke conveying pipe (1) is connected to the storage bin (202); a transmission mechanism (7) is provided in the conveying pipe (2) and extends along the axial direction of the conveying pipe (2) and passes through the feed bin (201), the storage bin (202) and the discharge bin (203) in sequence, and a catalyst module (9) is provided on the transmission mechanism (7).

2. The catalyst replacement device for a denitration system according to claim 1, characterized in that: The catalyst module (9) comprises a sealing box (901), a catalyst (903) is located in the sealing box (901), and the sealing box (901) is provided with smoke outlets (902) on both sides facing the smoke conveying pipe (1); the inner wall of the material storage bin (202) is provided with a slide groove (10) extending along the axial direction of the smoke conveying pipe (1) towards the catalyst module (9) and around the smoke conveying pipe (1); the slide groove (10) is provided with a sealing plug (11) extending along the extension direction of the slide groove (10); the projections of the sealing plug (11) and the sealing box (901) along the axial direction of the smoke conveying pipe (1) overlap, and the projection of the smoke outlet (902) along the axial direction of the smoke conveying pipe (1) is located in the middle of the sealing plug (11); the material conveying pipe (2) is provided with an electric push rod (12) for driving the sealing plug (11) to slide along the axial direction of the smoke conveying pipe (1).

3. The catalyst replacement device for a denitration system according to claim 1, characterized in that: The transmission mechanism (7) comprises rollers (701) which are rotated in the conveying pipe (2) and arranged in sequence along the axial direction of the conveying pipe (2), and a driving mechanism (702) for driving the rollers (701) to rotate; the rollers (701) extend in a horizontal direction and are perpendicular to the axis of the conveying pipe (2); a sealing valve A (3), a sealing valve B (4), a sealing valve C (5) and a sealing valve D (6), wherein the sealing valve A (3) and the sealing valve B (4) are respectively located between adjacent rollers (701).

4. The catalyst replacement device for a denitration system according to claim 3, characterized in that: The rollers (701) include a roller B (7012) rotatably disposed in a feed bin (201), a roller C (7013) rotatably disposed in a material placement bin (202), and a roller D (7014) rotatably disposed in a material discharge bin (203); the driving mechanism (702) includes a motor A (7021) for driving the roller B (7012) to rotate, a motor B (7022) for driving the roller C (7013) to rotate, and a motor C (7023) for driving the roller D (7014) to rotate.

5. The catalyst replacement device for a denitration system according to claim 4, characterized in that: The roller (701) further comprises a roller A (7011) and a roller E (7015), wherein the roller A (7011) is arranged on a side of the sealing valve A (3) away from the sealing valve B (4) and is connected to the motor A (7021), and the roller E (7015) is arranged on a side of the sealing valve D (6) away from the sealing valve C (5) and is connected to the motor C (7023).

6. The catalyst replacement device for a denitration system according to claim 1, characterized in that: The feed bin (201) and the discharge bin (203) are respectively connected to the input end of the smoke conveying pipe (1) through an air pump (13).

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