A SCR denitrification system

Abstract

The utility model relates to the technical field of SCR denitration, specifically an SCR denitration system, including an intake pipe, an air guide pipe and a denitration tower are arranged on one side of the intake pipe, the air guide pipe is connected to the denitration tower, an exhaust port is arranged at the bottom of the denitration tower, a connecting pipe is fixedly connected to the outer wall of one side of the intake pipe, the intake pipe is connected to the air guide pipe through the connecting pipe, the cross section of the air guide pipe is in the shape of an inverted "7", a preheating component is arranged inside the intake pipe, a mixing component is arranged inside the air guide pipe, a catalyst layer is arranged inside the denitration tower, the number of the catalyst layers is four groups, and the four groups of catalyst layers are distributed up and down. In the utility model, before the waste gas is passed through the denitration tower, the waste gas can be fully contacted and mixed with ammonia water, so that the subsequent waste gas can achieve efficient denitration of the waste gas in the denitration tower, meeting people's use needs.

Description

Technical Field

[0001] The utility model relates to the technical field of SCR denitration, in particular to an SCR denitration system. Background Art

[0002] In the existing denitration system, when the exhaust gas enters the denitration tower, it is not in sufficient contact with ammonia water, which easily leads to the inability of the exhaust gas to denitrate efficiently during the subsequent catalytic process, making the denitration efficiency and quality of the entire denitration tower relatively poor and unable to meet people's use needs. Therefore, an SCR denitration system is urgently needed to solve the above problems. Utility Model Content

[0003] Based on the deficiencies in the prior art mentioned in the above background technology, the utility model provides an SCR denitration system.

[0004] The utility model overcomes the above technical problems by adopting the following technical solutions, specifically:

[0005] An SCR denitration system comprises an air intake pipe, an air guide pipe and a denitration tower are arranged on one side of the air intake pipe, the air guide pipe is connected to the denitration tower, an exhaust port is arranged at the bottom of the denitration tower, a connecting pipe is fixedly connected to the outer wall of one side of the air intake pipe, the air intake pipe is connected to the air guide pipe through the connecting pipe, and the cross section of the air guide pipe is in the shape of an inverted "7";

[0006] A preheating component is arranged inside the air intake pipe;

[0007] A mixing assembly is arranged inside the air guide tube;

[0008] The denitration tower is provided with catalyst layers inside, the number of the catalyst layers is four groups, and the four groups of catalyst layers are distributed up and down;

[0009] A liquid supply pipe is inserted into one side of the air guide pipe, and ammonia water is transported inside the liquid supply pipe.

[0010] As a further solution of the utility model: the preheating component includes a mounting plate fixedly connected to the inner walls on both sides of the intake pipe, and a resistance wire is fixedly connected to the outer wall of one side of the mounting plate.

[0011] As a further solution of the utility model: a discharge pipe is inserted into the bottom of the air inlet pipe, and a control valve is arranged on the circumferential outer wall of the discharge pipe.

[0012] As a further solution of the utility model: a first guide plate and a second guide plate are fixedly connected to an inner wall of one side of the air guide pipe, and the number of the first guide plate and the number of the second guide plate are two groups and three groups respectively.

[0013] As a further solution of the utility model: a rectifier heater is fixedly connected to the interior of the denitration tower, and the rectifier heater is located above the catalyst layer.

[0014] As a further solution of the utility model: the liquid supply pipe extends to one end of the air guide pipe and is connected with equally distributed curved pipes, the top of the curved pipe is connected with equally distributed nozzles, and a third guide plate is fixedly connected to the inner wall of one side of the air guide pipe, and the third guide plate is located below the liquid supply pipe.

[0015] As a further solution of the utility model: the mixing assembly includes a fixing plate fixedly connected to the inside of the air duct, a circular hole is opened on the top outer wall of the fixing plate, a fixing ring is fixedly connected to the inside of the circular hole, a bearing seat is arranged in the middle part of the fixing ring, a cross bar is fixedly connected to the circumferential outer wall of the bearing seat, the cross bar is fixedly connected to the circumferential inner wall of the fixing ring, a rotating shaft is fixedly connected to the circumferential inner wall of the bearing seat, a first sleeve and a second sleeve are fixedly connected at both ends of the rotating shaft, a stirring rod is fixedly connected to the circumferential outer wall of the first sleeve, and a fan blade is fixedly connected to the circumferential outer wall of the second sleeve.

[0016] After adopting the above structure, the utility model has the following advantages compared with the prior art: before the exhaust gas enters the denitrification tower, the exhaust gas and ammonia water can be fully contacted and mixed, so that the subsequent exhaust gas can achieve efficient denitrification of the exhaust gas in the denitrification tower, meeting people's use needs. Specifically, by providing a mixing component, the exhaust gas can be heated by a resistance wire when entering the air duct through the air inlet pipe, so that the subsequent high-temperature exhaust gas can accelerate its reaction with ammonia water. Then, when the exhaust gas moves to the bottom of the fixed plate, the fan blades located under the fixed plate can be driven to rotate with the upward spraying of ammonia water and the rise of ammonia gas. The rotation of the fan blades can drive the rotating shaft to rotate together, and the stirring rod can be driven to rotate during the rotation of the rotating shaft. Therefore, through the joint action of the stirring rod and the fan blades, the exhaust gas and ammonia water can be fully mixed and reacted, avoiding the situation of insufficient subsequent denitrification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall front structure of the utility model.

[0018] Figure 2 It is a semi-sectional structural schematic diagram of the utility model.

[0019] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 4 It is a schematic diagram of the front structure of the mixing component of the utility model.

[0021] Figure 5 It is a schematic diagram of the back structure of the mixing component of the utility model.

[0022] In the figure: 1. air inlet pipe; 2. connecting pipe; 3. discharge pipe; 4. liquid supply pipe; 5. mounting plate; 6. resistance wire; 7. air guide pipe; 8. denitrification tower; 9. exhaust port; 10. first guide vane; 11. second guide vane; 12. rectifier heater; 13. catalyst layer; 14. third guide vane; 15. elbow; 16. nozzle; 17. fixing plate; 18. fixing ring; 20. first bushing; 21. stirring rod; 22. bearing seat; 23. rotating shaft; 24. cross bar; 25. second bushing; 26. fan blade. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figures 1 to 5 In the embodiment of the utility model, an SCR denitration system includes an intake pipe 1, an air guide pipe 7 and a denitration tower 8 are arranged on one side of the intake pipe 1, the air guide pipe 7 is connected to the denitration tower 8, an exhaust port 9 is arranged at the bottom of the denitration tower 8, a connecting pipe 2 is fixedly connected to the outer wall of one side of the intake pipe 1, the intake pipe 1 is connected to the air guide pipe 7 through the connecting pipe 2, and the cross section of the air guide pipe 7 is in the shape of an inverted "7";

[0025] A preheating component is arranged inside the air intake pipe 1;

[0026] A mixing assembly is provided inside the air guide tube 7;

[0027] The denitration tower 8 is provided with catalyst layers 13 in four groups, and the four groups of catalyst layers 13 are distributed up and down;

[0028] A liquid supply pipe 4 is inserted into one side of the air guide pipe 7, and ammonia water is transported inside the liquid supply pipe 4.

[0029] Preferably, the preheating component includes a mounting plate 5 fixedly connected to the inner walls on both sides of the intake pipe 1, and a resistance wire 6 is fixedly connected to the outer wall of one side of the mounting plate 5, which can be heated by the resistance wire 6 to facilitate the subsequent high-temperature exhaust gas to accelerate its reaction with ammonia water.

[0030] Preferably, a discharge pipe 3 is inserted into the bottom of the air inlet pipe 1, and a control valve is provided on the circumferential outer wall of the discharge pipe 3 to recover excess ammonia water.

[0031] Preferably, a first guide plate 10 and a second guide plate 11 are fixedly connected to the inner wall of one side of the air guide pipe 7, and the number of the first guide plate 10 and the second guide plate 11 are two groups and three groups respectively, which can play a guiding role for the exhaust gas and prevent the exhaust gas from concentrating on flowing from a certain area and preventing it from being able to fully contact with the ammonia water.

[0032] Preferably, a rectifier heater 12 is fixedly connected to the interior of the denitration tower 8, and the rectifier heater 12 is located above the catalyst layer 13. Reheating is performed by the rectifier heater 12 to enhance the reaction between the exhaust gas and the ammonia solution.

[0033] Preferably, the liquid supply pipe 4 extends to one end of the air guide pipe 7 and is connected with equally spaced curved pipes 15, and the top of the curved pipe 15 is connected with equally spaced nozzles 16. A third guide plate 14 is fixedly connected to the inner wall of one side of the air guide pipe 7. The third guide plate 14 is located below the liquid supply pipe 4 and can spray ammonia water to react with the exhaust gas, thereby achieving denitrification of the exhaust gas.

[0034] Preferably, the mixing assembly includes a fixing plate 17 fixedly connected to the inside of the air guide tube 7, a circular hole is opened on the top outer wall of the fixing plate 17, a fixing ring 18 is fixedly connected to the inside of the circular hole, a bearing seat 22 is arranged in the middle of the fixing ring 18, a cross bar 24 is fixedly connected to the circumferential outer wall of the bearing seat 22, the cross bar 24 is fixedly connected to the circumferential inner wall of the fixing ring 18, a rotating shaft 23 is fixedly connected to the circumferential inner wall of the bearing seat 22, and the first sleeve 20 and the second sleeve 25 are fixedly connected to the two ends of the rotating shaft 23, and the circumferential outer wall of the first sleeve 20 is fixedly connected to the second sleeve 25. A stirring rod 21 is fixedly connected to the wall, and a fan blade 26 is fixedly connected to the circumferential outer wall of the second sleeve 25. When the exhaust gas moves to the bottom of the fixed plate 17, the upward spraying of ammonia water and the rise of ammonia gas can drive the fan blade 26 located below the fixed plate 17 to rotate. The rotation of the fan blade 26 can drive the rotating shaft 23 to rotate together. During the rotation of the rotating shaft 23, the stirring rod 21 can also be driven to rotate. Therefore, through the joint action of the stirring rod 21 and the fan blade 26, the exhaust gas and ammonia water can be fully mixed and reacted to avoid the subsequent insufficient denitrification.

[0035] Working principle: when the exhaust gas enters the air duct 7 through the intake pipe 1, it can be heated by the resistance wire 6, so that the subsequent high-temperature exhaust gas can accelerate its reaction with ammonia water. Then, when the exhaust gas moves to the bottom of the fixed plate 17, with the upward spraying of ammonia water and the rise of ammonia gas, the fan blades 26 located under the fixed plate 17 can be driven to rotate. The rotation of the fan blades 26 can drive the rotating shaft 23 to rotate together. During the rotation of the rotating shaft 23, the stirring rod 21 can be driven to rotate. Therefore, through the joint action of the stirring rod 21 and the fan blades 26, the exhaust gas and ammonia water can be fully mixed and reacted to avoid the subsequent insufficient denitrification. When the exhaust gas carries ammonia water into the denitrification tower 8, it is first heated again by the rectifier heater 12 to enhance the reaction between the exhaust gas and ammonia water. Finally, through the catalysis of multiple groups of catalyst layers 13, the denitrification effect of the exhaust gas can be guaranteed.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. An SCR denitration system, comprising an intake pipe (1), characterized in that: An air guide pipe (7) and a denitration tower (8) are provided on one side of the air intake pipe (1); the air guide pipe (7) is connected to the denitration tower (8); an exhaust port (9) is provided at the bottom of the denitration tower (8); a connecting pipe (2) is fixedly connected to the outer wall of one side of the air intake pipe (1); the air intake pipe (1) is connected to the air guide pipe (7) via the connecting pipe (2); and the cross section of the air guide pipe (7) is in the shape of an inverted "7"; A preheating component is arranged inside the air intake pipe (1); A mixing component is arranged inside the air guide tube (7); The denitration tower (8) is provided with catalyst layers (13) inside, the number of the catalyst layers (13) is four groups, and the four groups of catalyst layers (13) are distributed up and down; A liquid supply pipe (4) is inserted into one side of the air guide pipe (7), and ammonia water is transported inside the liquid supply pipe (4).

2. The SCR denitration system according to claim 1, characterized in that: The preheating assembly comprises a mounting plate (5) fixedly connected to the inner walls on both sides of the air intake pipe (1), and a resistance wire (6) is fixedly connected to the outer wall of one side of the mounting plate (5).

3. The SCR denitration system according to claim 2, characterized in that: A discharge pipe (3) is inserted into the bottom of the air inlet pipe (1), and a control valve is provided on the circumferential outer wall of the discharge pipe (3).

4. The SCR denitration system according to claim 3, characterized in that: A first guide plate (10) and a second guide plate (11) are fixedly connected to an inner wall of one side of the air guide pipe (7), and the number of the first guide plates (10) and the number of the second guide plates (11) are two groups and three groups respectively.

5. The SCR denitration system according to claim 4, characterized in that: A rectifying heater (12) is fixedly connected to the interior of the denitration tower (8), and the rectifying heater (12) is located above the catalyst layer (13).

6. The SCR denitration system according to claim 5, characterized in that: The liquid supply pipe (4) extends to one end of the air guide pipe (7) and is plugged with equally spaced curved pipes (15); the top of the curved pipe (15) is plugged with equally spaced nozzles (16); a third guide plate (14) is fixedly connected to the inner wall of one side of the air guide pipe (7); and the third guide plate (14) is located below the liquid supply pipe (4).

7. The SCR denitration system according to claim 6, characterized in that: The mixing assembly comprises a fixing plate (17) fixedly connected to the inside of the air guide tube (7); a circular hole is opened on the top outer wall of the fixing plate (17); a fixing ring (18) is fixedly connected to the inside of the circular hole; a bearing seat (22) is arranged in the middle of the fixing ring (18); a cross bar (24) is fixedly connected to the circumferential outer wall of the bearing seat (22); the cross bar (24) is fixedly connected to the circumferential inner wall of the fixing ring (18); a rotating shaft (23) is fixedly connected to the circumferential inner wall of the bearing seat (22); a first shaft sleeve (20) and a second shaft sleeve (25) are fixedly connected at both ends of the rotating shaft (23); a stirring rod (21) is fixedly connected to the circumferential outer wall of the first shaft sleeve (20); and a fan blade (26) is fixedly connected to the circumferential outer wall of the second shaft sleeve (25).

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