Flue gas SCR (Selective Catalytic Reduction) denitration device

Abstract

The utility model discloses a flue gas SCR (Selective Catalytic Reduction) denitration device, and particularly relates to the technical field of flue gas denitration, the top of a rack is fixedly connected with a preheating pipeline, the top of the rack is connected with a first conveying pipe in a penetrating manner, the outer wall of the first conveying pipe is provided with a connecting valve, and the outer wall of the first conveying pipe is connected with a first connecting pipe in a penetrating manner; the inner wall of the sealing shell is movably connected with a second adjusting plate, and the bottom end of the push rod is fixedly connected with an adjusting valve. According to the SCR denitration device for the flue gas, through the arrangement of the connecting valve, the push rod, the sealing shell and the adjusting valve, the problem that an existing SCR denitration device cannot guarantee the flue gas conveying efficiency is solved, so that the whole device can be conveniently and rapidly adjusted according to the change of the flue gas, and the follow-up flue gas denitration treatment efficiency of the whole device is improved; and meanwhile, the situation that subsequent ammonia water and flue gas cannot be subjected to sufficient catalytic decomposition is prevented, so that the subsequent flue gas denitration effect of the whole device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas denitration, in particular to a flue gas SCR denitration device. Background Art

[0002] There are two main types of flue gas denitrification technologies: dry method (selective catalytic reduction flue gas denitrification, selective non-catalytic reduction denitrification) and wet method. Compared with wet flue gas denitrification technology, the main advantages of dry flue gas denitrification technology are: low basic investment, simple equipment and process, high efficiency of NOX removal, no wastewater and waste treatment, not easy to cause secondary pollution, and ammonia, CO or hydrocarbons are used as reducing agents to reduce NO in flue gas to N2 in the presence of oxygen. NH3, CO, H2, methane, ethylene, propane, propylene, etc. can be used as reducing agents for SCR reactions. The highest NO removal efficiency can be obtained when ammonia is used as the reducing gas. The SCR reaction is a redox reaction.

[0003] The existing flue gas SCR denitrification device uses a mixture of ammonia water and flue gas with a subsequent catalyst to complete the denitrification of the flue gas. Since the existing SCR denitrification device cannot guarantee the flue gas transportation efficiency, the subsequent ammonia water and flue gas ratio changes, resulting in the inability to fully catalytically decompose the flue gas, reducing the efficiency of the subsequent flue gas denitrification, and further affecting the effect of the subsequent flue gas denitrification. Therefore, the existing flue gas SCR denitrification device needs to be improved to a certain extent. Utility Model Content

[0004] The utility model aims to provide a flue gas SCR denitration device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas SCR denitrification device, comprising a frame, a preheating pipe is fixedly connected to the top of the frame, and an operation panel is arranged on the outer wall of the preheating pipe, a No. 1 delivery pipe is penetrated and connected to the top of the frame, and a connecting valve is installed on the outer wall of the No. 1 delivery pipe, a No. 1 connecting pipe is penetrated and connected to the outer wall of the No. 1 delivery pipe, and a sealing shell is installed on the other end of the No. 1 connecting pipe, a No. 2 regulating plate is movably connected to the inner wall of the sealing shell, and a push rod is fixedly connected to one side of the No. 2 regulating plate, and a regulating valve is fixedly connected to the bottom end of the push rod, a No. 2 connecting pipe is penetrated and connected to one side of the preheating pipe, and a mixing pipe is penetrated and connected to the other end of the No. 2 connecting pipe, a guide plate is arranged on the inner wall of the mixing pipe, and a mounting plate is fixedly connected to the inner wall of the mixing pipe;

[0006] An ammonia water tank is installed on the top of the frame, and an extraction pipe is connected through one side of the ammonia water tank, a water pump is installed on the other end of the extraction pipe, and a No. 3 connecting pipe is installed on the top of the water pump, a water spray pipe is installed on the inner wall of the No. 3 connecting pipe, and the other end of the water spray pipe is fixedly connected to a mounting plate, a fixing frame is installed on the inner wall of the mixing tube, and a No. 1 mixing plate is fixedly connected to the inner wall of the fixing frame, a processing pipe is connected through the other end of the mixing tube, and a heater is installed on the inner wall of the processing pipe, a catalyst is provided on the inner wall of the processing pipe, and a drain pipe is installed at the bottom end of the processing pipe.

[0007] Preferably, the inner wall of the connecting valve is fixedly connected to a fixing frame No. 1, and the inner wall of the fixing frame No. 1 is fixedly connected to a fixing rod, the outer wall of the fixing rod is movably connected to an adjusting plate No. 1, and the inner wall of the adjusting plate No. 1 matches the outer wall of the fixing rod in shape and size.

[0008] Preferably, both ends of the No. 1 connecting pipe are connected through the No. 1 conveying pipe and the sealing shell, and the sealing shell forms an adjustment structure through the No. 1 connecting pipe and the No. 1 conveying pipe, and the No. 2 adjustment plate forms a lifting structure through the change of air pressure inside the sealing shell.

[0009] Preferably, the outer wall of the push rod is fixedly connected to an adjustment plate No. 1, and the adjustment plate No. 1 forms a lifting structure through the push rod and the fixed rod, the outer wall of the push rod is movably connected to a No. 2 fixing frame, the bottom end of the No. 2 fixing frame is provided with a No. 2 return spring frame, and the other end of the No. 2 return spring frame is fixedly connected to a regulating valve.

[0010] Preferably, one side of the No. 1 adjustment plate is fixedly connected to a No. 1 return spring frame, and the other end of the No. 1 return spring frame is fixedly connected to a No. 2 fixing frame, the inner wall of the No. 2 fixing frame is fixedly connected to a fixing rod, and the No. 1 return spring frame forms a compression structure with the No. 2 fixing frame through the No. 1 adjustment plate.

[0011] Preferably, the water pump forms an integrated structure with the ammonia water tank through an extraction pipe, and an extraction pipe and a No. 3 connecting pipe are installed at both ends of the water pump, a guide pipe is installed at the other end of the No. 3 connecting pipe, and the guide pipe forms an integrated conveying structure with the ammonia water tank through the No. 3 connecting pipe and the extraction pipe.

[0012] Preferably, the inner wall of the fixed frame is provided with a No. 1 mixing plate and a No. 2 mixing plate, and the No. 1 mixing plate and the No. 2 mixing plate are arranged at 45° to the left and right of the mid-vertical line of the fixed frame, and the No. 1 mixing plate and the No. 2 mixing plate are on the same vertical line as the water spray pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model is used for the flue gas SCR denitration device;

[0014] 1. Through the connection valve, push rod, sealing shell and regulating valve, the flue gas delivery volume is regulated by air pressure regulation combined with spring compression. The change of flue gas pressure is delivered to the sealing shell through the No. 1 connection pipe. At this time, the No. 2 regulating plate is pushed by the change of the internal pressure of the sealing shell, so that the No. 2 regulating plate drives the regulating valve to slide along the inner wall of the connection valve through the push rod fixed at the bottom end, and then the flue gas flow rate in the connection valve is adjusted through the regulating valve, which solves the problem that the existing SCR denitrification device cannot guarantee the flue gas delivery efficiency, thereby facilitating the rapid adjustment of the overall device according to the change of flue gas, improving the efficiency of the subsequent denitrification treatment of the flue gas by the overall device, and preventing the subsequent ammonia water and flue gas from being fully catalytically decomposed, thereby ensuring the subsequent denitrification effect of the overall device on the flue gas;

[0015] 2. Through the water spray pipe, fixed frame and catalyst, the ammonia array is used for transporting and spraying in conjunction with the mixing plates arranged at multiple angles to complete the uniform mixing of the ammonia water and the flue gas. The water pump transports the ammonia water to the guide pipe through the No. 3 connecting pipe, and then the ammonia water is evenly sprayed through the nozzles on the multiple array water spray pipes. At this time, the ammonia water and the flue gas are mixed. At the same time, the No. 1 mixing plate and the No. 2 mixing plate are arranged at 45° to the left and right of the mid-vertical line of the fixed frame, so that the No. 1 mixing plate and the No. 2 mixing plate are further evenly mixed, which makes it convenient for the staff to quickly mix the ammonia water and the flue gas, improves the staff's mixing efficiency of the ammonia water and the flue gas, and prevents the change of the ratio of ammonia water and flue gas, thereby reducing the cost of ammonia water in flue gas mixing and increasing the usability of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the connection valve and the No. 1 fixing bracket of the utility model;

[0019] Figure 4 For this utility model Figure 2 A is an enlarged structural diagram of FIG.

[0020] In the figure: 1. frame; 2. preheating pipe; 3. operation panel; 4. No. 1 delivery pipe; 5. connecting valve; 6. No. 1 fixing frame; 7. fixing rod; 8. No. 1 adjusting plate; 9. push rod; 10. No. 2 adjusting plate; 11. sealing shell; 12. No. 1 connecting pipe; 13. No. 1 return spring frame; 14. No. 2 fixing frame; 15. No. 2 return spring frame; 16. regulating valve; 17. No. 2 connecting pipe; 18. mixing pipe; 19. guide plate; 20. mounting plate; 21. water spray pipe; 22. nozzle; 23. guide pipe; 24. ammonia tank; 25. extraction pipe; 26. water pump; 27. No. 3 connecting pipe; 28. fixing frame; 29. ​​No. 1 mixing plate; 30. No. 2 mixing plate; 31. treatment pipeline; 32. heater; 33. catalyst; 34. exhaust pipe. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-3 The utility model provides a technical solution: a flue gas SCR denitrification device, comprising a frame 1, a preheating pipe 2 is fixedly connected to the top of the frame 1, and an operation panel 3 is arranged on the outer wall of the preheating pipe 2, a No. 1 delivery pipe 4 is penetrated through the top of the frame 1, and a connecting valve 5 is installed on the outer wall of the No. 1 delivery pipe 4, a No. 1 connecting pipe 12 is penetrated through the outer wall of the No. 1 delivery pipe 4, and a sealing shell 11 is installed on the other end of the No. 1 connecting pipe 12, a No. 2 regulating plate 10 is movably connected to the inner wall of the sealing shell 11, and a push rod 9 is fixedly connected to one side of the No. 2 regulating plate 10, and a regulating valve 16 is fixedly connected to the bottom end of the push rod 9, a No. 2 connecting pipe 17 is penetrated through one side of the preheating pipe 2, and a mixing pipe 18 is penetrated and connected to the other end of the No. 2 connecting pipe 17, a guide plate 19 is arranged on the inner wall of the mixing pipe 18, and a mounting plate 20 is fixedly connected to the inner wall of the mixing pipe 18.

[0023] The inner wall of the connecting valve 5 is fixedly connected to a No. 1 fixing frame 6, and the inner wall of the No. 1 fixing frame 6 is fixedly connected to a fixing rod 7, and the outer wall of the fixing rod 7 is movably connected to a No. 1 adjusting plate 8, and the inner wall of the No. 1 adjusting plate 8 and the outer wall of the fixing rod 7 match each other in shape and size;

[0024] The two ends of the No. 1 connecting pipe 12 are connected to the No. 1 delivery pipe 4 and the sealing shell 11, and the sealing shell 11 forms an adjustment structure through the No. 1 connecting pipe 12 and the No. 1 delivery pipe 4, and the No. 2 adjustment plate 10 forms a lifting structure through the change of the internal air pressure of the sealing shell 11;

[0025] The outer wall of the push rod 9 is fixedly connected to a No. 1 adjustment plate 8, and the No. 1 adjustment plate 8 forms a lifting structure with the fixed rod 7 through the push rod 9. The outer wall of the push rod 9 is movably connected to a No. 2 fixing frame 14, and a No. 2 return spring frame 15 is arranged at the bottom end of the No. 2 fixing frame 14, and the other end of the No. 2 return spring frame 15 is fixedly connected to a regulating valve 16;

[0026] One side of the No. 1 adjustment plate 8 is fixedly connected to the No. 1 return spring frame 13, and the other end of the No. 1 return spring frame 13 is fixedly connected to the No. 2 fixing frame 14, the inner wall of the No. 2 fixing frame 14 is fixedly connected to the fixing rod 7, and the No. 1 return spring frame 13 forms a compression structure with the No. 1 adjustment plate 8 and the No. 2 fixing frame 14 through the No. 1 adjustment plate 8.

[0027] The specific implementation method is as follows: through the setting of the connecting valve 5, the push rod 9, the sealing shell 11 and the regulating valve 16, the air pressure regulation is combined with the spring compression method to complete the adjustment of the flue gas delivery volume, and the change of the flue gas pressure is delivered to the sealing shell 11 through the No. 1 connecting pipe 12. At this time, the No. 2 regulating plate 10 is pushed by the change of the internal pressure of the sealing shell 11, so that the No. 2 regulating plate 10 drives the regulating valve 16 to slide along the inner wall of the connecting valve 5 through the push rod 9 fixed at the bottom end, and then the flue gas flow rate in the connecting valve 5 is adjusted by the regulating valve 16, which solves the problem that the existing SCR denitrification device cannot guarantee the flue gas delivery efficiency, thereby facilitating the rapid adjustment of the overall device according to the change of the flue gas, and improving the efficiency of the subsequent denitrification treatment of the flue gas by the overall device. At the same time, it prevents the subsequent ammonia water and flue gas from being fully catalytically decomposed, thereby ensuring the subsequent denitrification effect of the overall device on the flue gas.

[0028] See also Figure 1-4 The utility model provides a technical solution: a flue gas SCR denitrification device, an ammonia water tank 24 is installed on the top of the frame 1, and an extraction pipe 25 is connected through one side of the ammonia water tank 24, a water pump 26 is installed on the other end of the extraction pipe 25, and a No. 3 connecting pipe 27 is installed on the top of the water pump 26, a water spray pipe 21 is installed on the inner wall of the No. 3 connecting pipe 27, and the other end of the water spray pipe 21 is fixedly connected to a mounting plate 20, a fixing frame 28 is installed on the inner wall of the mixing tube 18, and a No. 1 mixing plate 29 is fixedly connected to the inner wall of the fixing frame 28, a processing pipe 31 is connected through the other end of the mixing tube 18, and a heater 32 is installed on the inner wall of the processing pipe 31, a catalyst 33 is provided on the inner wall of the processing pipe 31, and a discharge pipe 34 is installed at the bottom end of the processing pipe 31.

[0029] The water pump 26 forms an integrated structure with the ammonia water tank 24 through the extraction pipe 25, and the extraction pipe 25 and the No. 3 connecting pipe 27 are installed at both ends of the water pump 26, and the other end of the No. 3 connecting pipe 27 is installed with the guide pipe 23, and the guide pipe 23 forms an integrated conveying structure with the ammonia water tank 24 through the No. 3 connecting pipe 27 and the extraction pipe 25;

[0030] The inner wall of the fixed frame 28 is provided with a mixing plate No. 1 29 and a mixing plate No. 2 30, and the mixing plate No. 1 29 and the mixing plate No. 2 30 are arranged at 45° to the mid-vertical line of the fixed frame 28, and the mixing plate No. 1 29 and the mixing plate No. 2 30 are on the same vertical line as the water spray pipe 21.

[0031] The specific implementation method is as follows: through the set water spray pipe 21, fixed frame 28 and catalyst 33, the ammonia array is used for conveying and spraying in conjunction with the mixing plates set at multiple angles to complete the uniform mixing of the ammonia water and the flue gas. The water pump 26 conveys the ammonia water to the guide pipe 23 through the No. 3 connecting pipe 27, and then the ammonia water is evenly sprayed through the nozzles 22 on the multiple array water spray pipes 21. At this time, the ammonia water and the flue gas are mixed. At the same time, the No. 1 mixing plate 29 and the No. 2 mixing plate 30 are conveniently set at 45° to the mid-vertical line of the fixed frame 28, so that the No. 1 mixing plate 29 and the No. 2 mixing plate 30 are further evenly mixed, which facilitates the staff to quickly mix the ammonia water and the flue gas, improves the staff's mixing efficiency of the ammonia water and the flue gas, and prevents the change of the ratio of ammonia water and flue gas, thereby reducing the cost of ammonia water in flue gas mixing and increasing the usability of the overall device.

[0032] Working principle: When using the flue gas SCR denitrification device, first connect the No. 1 delivery pipe 4 to the flue gas discharge point. At this time, the flue gas is transported to the preheating pipe 2 through the No. 1 delivery pipe 4 and the connecting valve 5, so that part of the flue gas is transported to the sealed shell 11 through the No. 1 connecting pipe 12. When the flue gas flow inside the No. 1 delivery pipe 4 is large, the change in the flue gas pressure is transported to the sealed shell 11 through the No. 1 connecting pipe 12. At this time, the No. 2 adjustment plate 10 is pushed by the change in the internal pressure of the sealed shell 11, so that the No. 2 adjustment plate 10 drives the push rod 9 fixed at the bottom to rise and fall along the sealed shell 11;

[0033] Thus, the push rod 9 drives the No. 1 adjustment plate 8 fixed on the outer wall to slide along the fixed rod 7. Since the outer wall of the push rod 9 is movably connected with the No. 2 fixing frame 14, the No. 1 adjustment plate 8 and the No. 2 fixing frame 14 compress the No. 1 return spring frame 13. At this time, the No. 1 adjustment plate 8 drives the push rod 9 to move up and down along the No. 2 fixing frame 14, so that the push rod 9 drives the No. 2 return spring frame 15 fixed on the outer wall to be compressed and adjusted along the limit ring set on the inner wall of the No. 1 fixing frame 6, thereby driving the regulating valve 16 to slide along the inner wall of the connecting valve 5 through the push rod 9, and then adjusting the smoke flow speed in the connecting valve 5 through the regulating valve 16;

[0034] At this time, the flue gas is transported to the mixing pipe 18 through the No. 2 connecting pipe 17 penetrating through both sides of the preheating pipe 2, and then the water pump 26 is started to extract the ammonia water in the ammonia water tank 24 through the extraction pipe 25, so that the water pump 26 transports the ammonia water to the guide pipe 23 through the No. 3 connecting pipe 27, and then the ammonia water is evenly sprayed through the nozzles 22 on the multiple array spray pipes 21, and the ammonia water is mixed with the flue gas;

[0035] At the same time, the flue gas and ammonia water are further evenly mixed at the fixed frame 28 through the No. 1 mixing plate 29 and the No. 2 mixing plate 30, and then the mixed ammonia water and flue gas are transported to the treatment pipeline 31 through the guide plate 19. At this time, the ammonia water and the flue gas are heated to 320 degrees to 400 degrees by the heater 32, so that the heated ammonia water and flue gas are catalyzed by multiple catalysts 33, so that the ammonia water and the flue gas are catalyzed to produce nitrogen and water, and then the nitrogen and water are discharged from the denitrification device through the exhaust pipe 34.

[0036] 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 flue gas SCR denitrification device, comprising a frame (1), characterized in that: The top of the frame (1) is fixedly connected to a preheating pipe (2), and an outer wall of the preheating pipe (2) is provided with an operation panel (3); the top of the frame (1) is penetrated by a No. 1 delivery pipe (4), and an outer wall of the No. 1 delivery pipe (4) is installed with a connecting valve (5); the outer wall of the No. 1 delivery pipe (4) is penetrated by a No. 1 connecting pipe (12), and the other end of the No. 1 connecting pipe (12) is installed with a sealing shell (11), and the inner wall of the sealing shell (11) is movably connected to the sealing shell (11). A No. 2 regulating plate (10) is connected, and a push rod (9) is fixedly connected to one side of the No. 2 regulating plate (10), and a regulating valve (16) is fixedly connected to the bottom end of the push rod (9); a No. 2 connecting pipe (17) is penetrated and connected to one side of the preheating pipe (2), and a mixing pipe (18) is penetrated and connected to the other end of the No. 2 connecting pipe (17), and a guide plate (19) is provided on the inner wall of the mixing pipe (18), and a mounting plate (20) is fixedly connected to the inner wall of the mixing pipe (18); An ammonia water tank (24) is installed on the top of the frame (1), and an extraction pipe (25) is connected to one side of the ammonia water tank (24), a water pump (26) is installed on the other end of the extraction pipe (25), and a No. 3 connecting pipe (27) is installed on the top of the water pump (26), a water spray pipe (21) is installed on the inner wall of the No. 3 connecting pipe (27), and the other end of the water spray pipe (21) is fixedly connected to a mounting plate (20), a fixing frame (28) is installed on the inner wall of the mixing pipe (18), and a No. 1 mixing plate (29) is fixedly connected to the inner wall of the fixing frame (28), a treatment pipe (31) is connected to the other end of the mixing pipe (18), and a heater (32) is installed on the inner wall of the treatment pipe (31), a catalyst (33) is provided on the inner wall of the treatment pipe (31), and a discharge pipe (34) is installed at the bottom end of the treatment pipe (31).

2. A flue gas SCR denitrification device according to claim 1, characterized in that: The inner wall of the connecting valve (5) is fixedly connected to a first fixing frame (6), and the inner wall of the first fixing frame (6) is fixedly connected to a fixing rod (7), the outer wall of the fixing rod (7) is movably connected to a first adjusting plate (8), and the inner wall of the first adjusting plate (8) and the outer wall of the fixing rod (7) match each other in shape and size.

3. The flue gas SCR denitrification device according to claim 1, characterized in that: The two ends of the No. 1 connecting pipe (12) are connected to the No. 1 delivery pipe (4) and the sealing shell (11), and the sealing shell (11) forms an adjustment structure through the No. 1 connecting pipe (12) and the No. 1 delivery pipe (4), and the No. 2 adjustment plate (10) forms a lifting structure through the change of the internal air pressure of the sealing shell (11).

4. A flue gas SCR denitration device according to claim 2, characterized in that: The outer wall of the push rod (9) is fixedly connected to a first adjustment plate (8), and the first adjustment plate (8) forms a lifting structure with the fixed rod (7) through the push rod (9), and the outer wall of the push rod (9) is movably connected to a second fixing frame (14), and a second return spring frame (15) is arranged at the bottom end of the second fixing frame (14), and the other end of the second return spring frame (15) is fixedly connected to a regulating valve (16).

5. A flue gas SCR denitration device according to claim 4, characterized in that: A first return spring frame (13) is fixedly connected to one side of the first adjustment plate (8), and a second fixed frame (14) is fixedly connected to the other end of the first return spring frame (13); a fixing rod (7) is fixedly connected to the inner wall of the second fixed frame (14), and the first return spring frame (13) forms a compression structure with the second fixed frame (14) through the first adjustment plate (8).

6. The flue gas SCR denitrification device according to claim 1, characterized in that: The water pump (26) forms an integrated structure with the ammonia water tank (24) through an extraction pipe (25), and the extraction pipe (25) and a No. 3 connecting pipe (27) are installed at both ends of the water pump (26), and a flow guide pipe (23) is installed at the other end of the No. 3 connecting pipe (27), and the flow guide pipe (23) forms an integrated conveying structure with the ammonia water tank (24) through the No. 3 connecting pipe (27) and the extraction pipe (25).

7. The flue gas SCR denitration device according to claim 1, characterized in that: The inner wall of the fixed frame (28) is provided with a first mixing plate (29) and a second mixing plate (30), and the first mixing plate (29) and the second mixing plate (30) are arranged at an angle of 45 degrees to the left and right of the mid-vertical line of the fixed frame (28), and the first mixing plate (29) and the second mixing plate (30) are on the same vertical line as the water spray pipe (21).

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