Gas turbulence device for uniformly mixing flue gas for denitration system

Abstract

The utility model relates to the technical field of heat exchanger disassembly, in particular to a flue gas uniform mixing gas turbulence device for a denitration system, which comprises a transition gas chamber, a turbulence structure and an ammonia spraying pipeline, ammonia spraying holes positioned in the transition gas chamber are arranged on the ammonia spraying pipeline, the turbulence structure is arranged in the transition gas chamber, the turbulence structure comprises a turbulence plate and a turbulence cone, and the turbulence plate is arranged in the transition gas chamber. The spoiler is located on the side, where ammonia is sprayed out, of the ammonia spraying hole, the spoiler cone is located between the spoiler and the ammonia spraying hole, the cone angle of the spoiler cone directly faces the side, where the ammonia is sprayed out, of the ammonia spraying hole, the spoiler cone is used for scattering the ammonia sprayed out of the ammonia spraying hole and guiding the ammonia to the spoiler, and the spoiler is used for scattering the ammonia guided by the spoiler cone for the second time. According to the ammonia spraying device of the denitration system, the defect that an existing ammonia spraying device of the denitration system cannot scatter ammonia sprayed out of an ammonia spraying pipeline and then guide the ammonia to a spoiler is overcome, and the mixing degree of the ammonia and sintering flue gas in the transition gas chamber is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification in a denitration system, and particularly relates to a gas turbulence device for flue gas mixing in a denitration system. Background Technique

[0002] At present, in the integrated process of activated coke desulfurization and denitration, denitration means injecting a certain amount of ammonia into the denitration system, and the ammonia is directly injected into the transition gas chamber through the ammonia injection pipeline, mixed with the sintering flue gas entering the transition gas chamber, and then enters the denitration section to complete denitration under the condition of using activated coke as a carrier. Among them, achieving the mixing degree of ammonia and flue gas during the denitration process is an important factor affecting the denitration efficiency.

[0003] Since the ammonia injection is directly sprayed into the transition gas chamber, during this process, there is a situation where the ammonia distribution is uneven and some of it is not fully mixed with the sintering flue gas. For this reason, the existing patent publication number CN210584476U discloses a denitration system ammonia injection device, which sets turbulence plates on the inner wall of the ammonia-air mixing pipe (transition gas chamber), uses the turbulence plates to change the flow direction of the flue gas, extends the flow time of ammonia and sintering flue gas in the transition gas chamber, and improves the mixing degree of ammonia and sintering flue gas in the transition gas chamber.

[0004] However, the above-mentioned denitration system ammonia injection device cannot disperse the ammonia ejected from the ammonia injection pipeline and then divert it to the turbulence plate, resulting in uneven distribution of ammonia in the transition gas chamber, thereby greatly reducing the mixing degree of ammonia and sintering flue gas in the transition gas chamber. Content of the Utility Model

[0005] One of the purposes of the utility model is to provide a gas turbulence device for flue gas mixing in a denitration system, aiming to solve the technical problem that the existing denitration system ammonia injection device cannot disperse the ammonia ejected from the ammonia injection pipeline and then divert it to the turbulence plate, resulting in uneven distribution of ammonia in the transition gas chamber, thereby reducing the mixing degree of ammonia and sintering flue gas in the transition gas chamber.

[0006] To achieve the above purpose, the utility model provides a gas turbulence device for flue gas mixing in a denitration system, which includes a transition gas chamber, a turbulence structure, and an ammonia injection pipeline. The ammonia injection pipeline is provided with ammonia injection holes located in the transition gas chamber. The turbulence structure is arranged in the transition gas chamber. The turbulence structure includes a turbulence plate and a turbulence cone. The turbulence plate is located on the side where the ammonia ejected from the ammonia injection hole is located. The turbulence cone is located between the turbulence plate and the ammonia injection hole. The cone angle of the turbulence cone is directly facing the side where the ammonia ejected from the ammonia injection hole is located. The turbulence cone is used to disperse the ammonia ejected from the ammonia injection hole and divert the ammonia to the turbulence plate. The turbulence plate is used to disperse the ammonia diverted by the turbulence cone a second time.

[0007] Further, the direction in which ammonia is ejected from the ammonia injection holes is opposite to the flue gas flow direction in the transition gas chamber.

[0008] Further, the spoiler cone is a cone.

[0009] Further, the cone angle of the spoiler cone and the spacing between the ammonia injection holes are set as L, and the relationship satisfied by L is 10 ≤ L ≤ 20 cm.

[0010] Further, the spoiler plate is fixed to the inner wall of the transition gas chamber through support columns.

[0011] Further, the spoiler cone is fixed to the inner wall of the transition gas chamber through fixing columns.

[0012] Further, the included angle between the connection line between the center of the ammonia injection hole and the center of the spoiler plate and the spoiler plate is set as included angle A, and the included angle A is 30° to 60°.

[0013] Further, a plurality of ammonia injection holes are provided, and a plurality of spoiler structures are also provided. The plurality of spoiler structures correspond to the plurality of ammonia injection holes one by one.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] During the use of the gas spoiler device for flue gas mixing in the denitration system of the present utility model, the ammonia ejected from the ammonia injection holes is dispersed by the spoiler cone and the ammonia is diverted to the spoiler plate. The ammonia is further dispersed by the spoiler plate, so that the dispersed ammonia and the sintering flue gas are fully contacted, and the sintering flue gas and ammonia are fully mixed and uniform in the transition gas chamber, avoiding uneven distribution of ammonia in the transition gas chamber. Thus, the defect that the existing ammonia injection device in the denitration system cannot disperse the ammonia ejected from the ammonia injection pipeline and then divert it to the spoiler plate is overcome, and further, the mixing degree of ammonia and sintering flue gas in the transition gas chamber is greatly improved. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the gas spoiler device for flue gas mixing in the denitration system of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the embodiment of the present utility model in which the spoiler cone is located below the ammonia injection holes;

[0018] Figure 3 is a schematic structural diagram of the connection relationship between the spoiler cone and the spoiler plate in the embodiment of the present utility model.

[0019] Reference numerals in each drawing:

[0020] 1. Transition gas chamber; 10. Air inlet; 11. Air outlet; 2. Ammonia injection pipeline; 20. Ammonia injection holes; 3. Turbulence cone; 30. Turbulence plates; 4. Support columns; 5. Denitrification section. Detailed implementation manners

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "width", "upper", "lower", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0025] Please refer to Figure 1 - Figure 3, the present utility model provides a gas turbulence device for flue gas mixing in a denitration system, which includes a transition gas chamber 1, a turbulence structure, and an ammonia injection pipe 2. Ammonia injection holes 20 are provided on the ammonia injection pipe 2 and are located inside the transition gas chamber 1. The turbulence structure is arranged inside the transition gas chamber 1. Among them, the turbulence structure includes a turbulence plate 30 and a turbulence cone 3. The turbulence plate 30 is located on the side where ammonia gas is ejected from the ammonia injection holes 20, and the turbulence cone 3 is located between the turbulence plate 30 and the ammonia injection holes 20. The cone angle of the turbulence cone 3 faces towards the side where ammonia gas is ejected from the ammonia injection holes 20. The turbulence cone 3 is used to disperse the ammonia gas ejected from the ammonia injection holes 20 and divert the ammonia gas to the turbulence plate 30, and the turbulence plate 30 is used to disperse the ammonia gas diverted by the turbulence cone 3 for the second time.

[0026] During the use of the gas turbulence device for flue gas mixing in the denitration system of the present utility model, the ammonia gas ejected from the ammonia injection holes 20 is dispersed by the turbulence cone 3 and diverted to the turbulence plate 30. The ammonia gas is dispersed for the second time by the turbulence plate 30, so that the dispersed ammonia gas and the sintering flue gas are in full contact, and the sintering flue gas and ammonia gas are fully mixed and uniform inside the transition gas chamber 1, avoiding uneven distribution of ammonia gas inside the transition gas chamber 1. Thus, it overcomes the defect that the existing ammonia injection device in the denitration system cannot disperse the ammonia gas ejected from the ammonia injection pipe 2 and then divert it to the turbulence plate 30, and further greatly improves the mixing degree of ammonia gas and sintering flue gas inside the transition gas chamber 1.

[0027] In this embodiment, referring to Figure 1 , the direction of ammonia gas ejected from the ammonia injection holes 20 is opposite to the flue gas flow direction of the transition gas chamber 1. Exemplarily, the air inlet 10 of the transition gas chamber 1 is arranged at the bottom of the transition gas chamber 1, and the air outlet 11 of the transition gas chamber 1 is arranged at the top of the transition gas chamber 1. The sintering flue gas enters the transition gas chamber 1 from the air inlet 10 and then is discharged from the air outlet 11 of the transition gas chamber 1; then the opening of the ammonia injection holes 20 faces downward, so that the ammonia injection holes 20 eject ammonia gas from top to bottom, and the cone angle of the turbulence cone 3 faces upward and is directly opposite to the ammonia injection holes 20, and the turbulence plate 30 is located below the turbulence cone 3. In this way, the ammonia injection holes 20 eject ammonia gas downward, the ammonia gas is dispersed by the turbulence cone 3, and under the action of the conical surface of the turbulence cone 3, the ammonia gas is diverted to the turbulence plate 30 and is dispersed for the second time by the turbulence plate 30, avoiding uneven distribution of ammonia gas inside the transition gas chamber 1; and the sintering flue gas enters the transition gas chamber 1 from the air inlet 10, is mixed evenly with ammonia gas, and then enters the denitration section 5 from the air outlet 11. Since the ammonia injection direction is opposite to the flue gas flow direction, the mixing time of ammonia gas and flue gas is increased, which is more conducive to the mixing of flue gas and ammonia gas, and further makes the mixing of flue gas and ammonia gas more uniform.

[0028] In addition, it should be noted that the cone angle of the turbulence cone 3 faces upward and is directly opposite to the ammonia injection holes 20, which can meet the need for uniform diffusion of ammonia gas to the greatest extent and make the ammonia gas ejected from the ammonia injection holes 20 reach the greatest extent of diffusion.

[0029] In this embodiment, the spoiler cone 3 is a cone. Compared with a polygonal vertebral body, the guiding effect of the conical surface of the cone is more uniform and stable. Please refer to Figure 2 , in addition, the distance between the cone angle of the spoiler cone 3 and the ammonia injection holes 20 is set as L, and the relationship satisfied by L is 10 ≤ L ≤ 20 cm. In this embodiment, L is set as 10 cm, which can prevent the distance between the spoiler cone 3 and the ammonia injection holes 20 from being too large and affecting the diffusion effect of ammonia. In other embodiments, L can also be 20 cm or 15 cm, which also does not affect the diffusion effect of ammonia, so it is not limited here.

[0030] In this embodiment, the angle of the cone angle of the spoiler cone 3 is 60° to 90°. Specifically, the angle of the cone angle is 60°, and this angle is more conducive to guiding ammonia to the spoiler plate 30 below the spoiler cone 3. Of course, in other embodiments, the angle of the cone angle of the spoiler cone 3 can also be 90° or 75°.

[0031] In this embodiment, the spoiler plate 30 is fixed to the inner wall of the transition air chamber 1 through the support column 4. Since the spoiler plate 30 is located below the spoiler cone 3, the spoiler plate 30 can be easily fixed by being supported by the support column 4 fixed to the inner wall of the transition air chamber 1. Of course, there is a distance between the spoiler plate 30 and the side wall surface of the transition air chamber 1 to prevent the mixed gas (mixed gas: ammonia and flue gas mixture) from affecting the entry into the denitration section 5.

[0032] In this embodiment, the spoiler cone 3 is also fixed to the inner wall of the transition air chamber 1 through the above-mentioned support column 4. Since the spoiler cone 3 is located between the spoiler plate 30 and the ammonia injection holes 20, the spoiler cone 3 is also supported and fixed by the above-mentioned support column 4 to prevent other fixing structures from occupying the space of the transition air chamber 1.

[0033] Please refer to Figure 3 , in this embodiment, the included angle between the connection line between the center of the ammonia injection hole 20 and the center of the spoiler plate 30 and the spoiler plate 30 is set as the included angle A, and the included angle A is 30° to 60°. Specifically, the included angle A is 30°, and this angle is conducive to the spoiler plate 30 having a better effect of redispersing ammonia. Of course, in other embodiments, the included angle A can also be 60° or 40° or 50°, and it is not limited here.

[0034] Please continue to refer to Figure 1 , in this embodiment, there are multiple ammonia injection holes 20, and there are also multiple spoiler structures. The multiple spoiler structures correspond to the multiple ammonia injection holes 20 one by one. It can be seen from this that one ammonia injection hole 20 corresponds to one spoiler structure. In this way, while improving the ammonia injection efficiency of the ammonia injection pipeline 2, the diffusion effect of ammonia in the transition air chamber 1 is also greatly improved, and the denitration efficiency is prevented from being affected by the uneven distribution of ammonia in the transition air chamber 1.

[0035] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A gas turbulence device for flue gas mixing in a denitration system, comprising a transition gas chamber, a turbulence structure and an ammonia injection pipeline. Ammonia injection holes located in the transition gas chamber are formed in the ammonia injection pipeline, and the turbulence structure is arranged in the transition gas chamber. It is characterized in that, The spoiler structure includes a spoiler plate and a spoiler cone. The spoiler plate is located on the side where ammonia gas is ejected from the ammonia injection holes. The spoiler cone is located between the spoiler plate and the ammonia injection holes. The cone angle of the spoiler cone faces the side where ammonia gas is ejected from the ammonia injection holes. The spoiler cone is used to disperse the ammonia gas ejected from the ammonia injection holes and divert the ammonia gas to the spoiler plate, and the spoiler plate is used to disperse the ammonia gas diverted by the spoiler cone a second time.

2. The gas turbulence device for flue gas mixing in the denitration system according to claim 1, characterized in that, The direction in which the ammonia injection holes eject ammonia gas is opposite to the flue gas flow direction in the transition gas chamber.

3. The gas spoiler device for flue gas mixing in the denitration system according to claim 1, wherein The included angle between the line connecting the centers of the ammonia injection holes and the spoiler plate and the spoiler plate is set as included angle A, and the included angle A is 30° to 60°.

4. The gas turbulence device for flue gas mixing in the denitration system according to claim 1, characterized in that, The spoiler cone is a cone.

5. The gas turbulence device for flue gas mixing in the denitration system according to claim 1, characterized in that, The distance between the cone angle of the spoiler cone and the ammonia injection holes is set as L, and the relationship satisfied by L is 10 ≤ L ≤ 20 cm.

6. The gas turbulence device for flue gas mixing in the denitration system according to claim 1, characterized in that, The spoiler plate is fixed to the inner wall of the transition gas chamber through support columns.

7. The gas spoiler device for flue gas mixing in the denitration system according to claim 6, characterized in that, The spoiler cone is also on the inner wall of the transition gas chamber through the support columns.

8. The gas turbulence device for flue gas mixing in the denitration system according to any one of claims 1-7, characterized in that, A plurality of ammonia injection holes are provided, and a plurality of spoiler structures are also provided. The plurality of spoiler structures correspond to the plurality of ammonia injection holes one by one.

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