CN218166564U - SCR denitration ammonia spraying mixing device - Google Patents
SCR denitration ammonia spraying mixing device Download PDFInfo
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- CN218166564U CN218166564U CN202221554272.2U CN202221554272U CN218166564U CN 218166564 U CN218166564 U CN 218166564U CN 202221554272 U CN202221554272 U CN 202221554272U CN 218166564 U CN218166564 U CN 218166564U
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Abstract
The utility model provides an ammonia mixing arrangement is spouted in SCR denitration, ammonia mixing arrangement is spouted in SCR denitration includes the flue, the one end of flue is the feed inlet, the flue includes first flue and the second flue that crooked is connected, along flue gas flow direction and perpendicular to in the first flue the direction of flue has set gradually grid and autogyration blender, be provided with the SCR reactor in the second flue, the bottom of SCR reactor is provided with the discharge gate. The utility model discloses in, the SCR denitration ammonia injection mixing device that provides passes through the cooperation setting of grid, autogyration blender and SCR reactor for ammonia flue gas mixing uniformity is better, and the ammonia consumption is littleer, simultaneously because autogyration blender's rotating vane is rotatory along with the air current is high-speed, and its resistance is littleer, also difficult deposition, and whole device simple structure is fit for promoting.
Description
Technical Field
The utility model belongs to the technical field of the electricity generation trade environmental protection, a SCR denitration spouts ammonia mixing arrangement is related to.
Background
In order to reduce pollutant emission of the unit and respond to the national call for energy conservation and emission reduction, all domestic thermal power units are subjected to denitration modification at present to control NOx emission. The boiler flue gas outlet is provided with an SCR denitration device for catalytically reducing NOx generated in the flue gas into N 2 The reducing agent used for SCR denitration is NH 3 . If NH 3 Non-uniform mixing with the flue gas will cause NH 3 Is used in excess. To strengthen NH 3 And flue gas, various forms of bypass mixing devices are currently available.
CN202951432U discloses a gas mixing device and a fluid mixing system, which are used in cooperation with plasma processing equipment, and are used for mixing a plurality of reaction gases and then introducing the mixed reaction gases into the plasma processing equipment for plasma processing, wherein the reaction gases at least comprise a first gas and a second gas, and the mixing device comprises: the mixed gas pipeline is provided with at least a first gas inlet and a second gas inlet at one end and a mixed gas outlet at the other end; the first gas inlet is used for introducing the first gas; the second gas inlet is used for introducing the second gas; the mixed gas outlet is used for introducing the mixed reaction gas into the plasma processing equipment; the mist pipeline is the pipeline that a cross sectional area changes, and this utility model's gas mixing arrangement can be in limited space, through the cross sectional area who changes the pipeline in succession, strengthens pipeline mist's ability and speed greatly.
CN210752111U discloses a full-load adaptive SCR ammonia injection system, which comprises an ammonia injection device, a flue gas large-range self-mixing device and a rectifying device; the ammonia spraying device comprises a plurality of groups of ammonia spraying assemblies, each ammonia spraying assembly comprises ammonia spraying branch pipes, each ammonia spraying branch pipe in each ammonia spraying assembly is arranged from front to back along the flow direction of flue gas in sequence from long to short according to the length extending into a flue, the longest length specification extending into the flue of each ammonia spraying branch pipe is equal to the depth of the flue, the shortest length specification extending into the flue of each ammonia spraying branch pipe is 1/2-1/3 of the depth of the flue, each ammonia spraying assembly comprises a plurality of nozzles, and the nozzles are arranged on the ammonia spraying branch pipes on the front side and the pipe sections which are not overlapped with the ammonia spraying branch pipes on the rear side.
However, the fixed obstacle resistance is great in the present mixing device, and there is the trend of back deposition, can't realize the mixed flow of effect by force, consequently, need urgently to design and develop an SCR denitration ammonia injection mixing device, when overcoming prior art defect, satisfies the demand of actual production life.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an ammonia mixing arrangement is spouted in SCR denitration the utility model discloses in, the SCR denitration that provides spouts the cooperation setting of ammonia mixing arrangement through grid, autogyration blender and SCR reactor for ammonia flue gas mixing uniformity is better, and ammonia consumption is littleer, simultaneously because autogyration blender's rotating vane is along with the high-speed rotation of air current, and its resistance is littleer, also difficult deposition, and whole device simple structure is fit for promoting.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an ammonia mixing arrangement is spouted in SCR denitration, ammonia mixing arrangement is spouted in SCR denitration includes the flue, the one end of flue is the feed inlet, the flue includes first flue and the second flue that crooked is connected, along flue gas flow direction and perpendicular to in the first flue the direction of flue has set gradually grid and autogyration blender, be provided with the SCR reactor in the second flue, the bottom of SCR reactor is provided with the discharge gate.
The utility model discloses in, the SCR denitration ammonia injection mixing device that provides passes through the cooperation setting of grid, autogyration blender and SCR reactor for ammonia flue gas mixing uniformity is better, and the ammonia consumption is littleer, simultaneously because autogyration blender's rotating vane is rotatory along with the air current is high-speed, and its resistance is littleer, also difficult deposition, and whole device simple structure is fit for promoting.
As an optimal technical scheme, the one end of first flue is the feed inlet, the other end with the crooked connection of second flue.
It should be noted that the utility model discloses structural feature such as size, shape and material to the flue does not do specific requirement and special limitation, and the flue is in the utility model provides an effect is the essential component part of ammonia mixing arrangement is spouted in the SCR denitration, and inside bears grid, autogyration blender and SCR reactor, carries out the buffer time of effective mixture to flue gas and ammonia, consequently can understand, other flues that can realize this type of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability adjustment to size, shape and the material of flue according to use scene and test condition.
As an optimized technical scheme of the utility model, the feed inlet is along the gradual shrinkage formula structure of flue gas flow direction.
As an optimized technical proposal of the utility model, the grid is an ammonia spraying grid.
It should be noted that the utility model discloses do not do concrete requirement and special limitation to the size, shape and the material isostructure characteristic of ammonia injection grid, the ammonia injection grid is in the utility model provides an effect is to spraying the ammonia in the flue gas, the size phase-match of its size concrete and flue, and the ammonia injection grid is through the branched multiple row pipe of female pipe, trompil on the pipe, the ammonia is by Kong Penru, consequently can understand, other ammonia injection grids that can realize this type of function all can be used to the utility model discloses in, technical person in the art can carry out the adaptability to size, shape and the material of ammonia injection grid according to usage scenario and test condition and adjust.
As an optimized technical scheme of the utility model, the grid perpendicular to the direction of flue, and set up at the horizontal direction.
As an optimized technical scheme of the utility model, from the rotating mixer perpendicular to the direction of flue, and set up at the horizontal direction.
It should be noted that the utility model discloses structural feature such as size, shape and material to autogyration blender does not do concrete requirement and special limitation, and autogyration blender is in the utility model provides an effect is to carrying out the strong mixed flow to flue gas and ammonia, makes it mix more evenly, and shortens the slow-down time, consequently can understand that other autogyration blenders that can realize this type of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability adjustment to autogyration blender's size, shape and material according to use scene and test condition.
As an optimized technical scheme of the utility model, the SCR reactor perpendicular to the direction of flue, and set up at the horizontal direction.
It should be noted that the utility model discloses do not do specific requirements and special restriction to the structural feature such as size, shape and the material of SCR reactor, the SCR reactor is in the utility model provides an effect is to the mixture of flue gas and ammonia, carries out efficient catalytic reduction denitration reaction, consequently can understand that other SCR reactors that can realize such function all can be used the utility model discloses in, technical person in the art can carry out the adaptability adjustment to the size, the shape and the material of SCR reactor according to use scene and test condition.
As an optimal technical scheme of the utility model, autogyration blender includes support, rotation axis and rotating vane, be provided with the perpendicular to on the support the rotation axis of support, rotating vane is connected to the other end of rotation axis, just rotating vane is towards the flue gas.
It should be noted that the present invention does not require and limit the size, shape, and material of the bracket, and the bracket is used to support the rotating shaft and the rotating blade, so it can be understood that other brackets that can realize such functions can be used in the present invention, and those skilled in the art can adjust the size, shape, and material of the bracket according to the use scene and the test condition.
As a preferred technical solution of the present invention, the rotating shaft is provided with at least two.
It should be noted that the present invention does not require and limit the structural features of the rotating shaft such as size, shape and material, and the rotating shaft is used to support the rotating blades and make the rotating blades capable of changing direction, so it can be understood that other rotating shafts capable of realizing the function can be used in the present invention, and those skilled in the art can adjust the size, shape and material of the rotating shaft according to the use scene and the test condition.
As a preferred technical solution of the present invention, the rotary blade is provided with at least three.
It should be noted that the utility model discloses structural feature such as size, shape and material of rotating vane does not do specific requirement and special limitation, and rotating vane is in the utility model provides an effect carries out the intensive mixing to the gas mixture of flue gas and ammonia, consequently can understand, other rotating vane that can realize this kind of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability according to size, shape and the material of using scene and test condition rotating vane and adjust.
Illustratively, the utility model discloses well SCR denitration spouts ammonia mixing arrangement's specific application does:
flue gas enters a flue, ammonia gas is sprayed in by an ammonia spraying grid, when the mixed flue gas passes through a self-rotating mixer, the mixed flue gas and the ammonia gas are spirally flowed and intensively mixed, the uniformly mixed flue gas and the ammonia gas enter an SCR (selective catalytic reduction) reactor and are subjected to high-efficiency catalytic reduction reaction, and NOx and NH in the flue gas 3 Reaction is N 2 And H 2 O。
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses in, the SCR denitration ammonia-spraying mixing device who provides passes through the cooperation setting of grid, autogyration blender and SCR reactor for ammonia flue gas mixing uniformity is better, and the ammonia consumption is littleer, simultaneously because autogyration blender's rotating vane is rotatory along with the air current is high-speed, and its resistance is littleer, also difficult deposition, and whole device simple structure is fit for promoting.
Drawings
Fig. 1 is a schematic structural diagram of an SCR denitration ammonia injection mixing device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a self-rotating mixer in an SCR denitration ammonia-spraying mixing device according to an embodiment of the present invention;
wherein, 1-flue; 2-ammonia injection grid; 3-a self-rotating mixer; 4-SCR reactor; 31-rotating blades; 32-a rotation axis; 33-support.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In a specific embodiment, the utility model provides an ammonia mixing arrangement is spouted in SCR denitration, as shown in fig. 1 and fig. 2, the ammonia mixing arrangement is spouted in SCR denitration includes flue 1, and the one end of flue 1 is the feed inlet, and the feed inlet is the convergent formula structure along flue gas flow direction, and flue 1 includes first flue and the second flue of crooked connection, has set gradually grid and autogyration blender 3 along flue gas flow direction and perpendicular to flue 1's direction in the first flue, is provided with SCR reactor 4 in the second flue, and the bottom of SCR reactor 4 is provided with the discharge gate.
The utility model discloses in, the SCR denitration ammonia injection mixing device that provides passes through grid, autogyration blender 3 and SCR reactor 4's cooperation setting for ammonia flue gas mixing uniformity is better, and the ammonia consumption is littleer, simultaneously because autogyration blender 3's rotating vane 31 is rotatory along with the air current is high-speed, and its resistance is littleer, also difficult deposition, and whole device simple structure is fit for promoting.
One end of the first flue is a feed inlet, and the other end of the first flue is connected with the second flue in a bending way. It should be noted that, the utility model discloses structural feature such as size, shape and material to flue 1 does not make concrete requirement and special limitation, and flue 1 is in the utility model provides an effect is the essential component part of ammonia mixing arrangement is spouted in the SCR denitration, and inside bears grid, autogyration blender 3 and SCR reactor 4, carries out the buffer time of effective mixture to flue gas and ammonia, consequently can understand, other flues 1 that can realize this kind of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability according to size, shape and the material of using scene and test condition to flue 1 and adjust.
The grid is an ammonia injection grid 2, is vertical to the direction of the flue 1 and is arranged in the horizontal direction. It should be noted that the utility model discloses structural feature such as size, shape and material to the ammonia injection grid 2 does not do concrete requirement and special limitation, and the ammonia injection grid 2 is in the utility model provides an effect is to spraying the ammonia in the flue gas, and the size is concrete and the size phase-match of flue 1, therefore can understand that other ammonia injection grids 2 that can realize this type of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability according to use scene and test condition to the size, shape and the material of ammonia injection grid 2 and adjust.
The self-rotating mixer 3 is perpendicular to the direction of the flue 1 and is disposed in the horizontal direction. It should be noted that the utility model discloses do not make concrete requirement and special limitation to structural feature such as size, shape and material from rotating mixer 3, from rotating mixer 3 is in the utility model provides an effect is to carrying out the strong mixed flow of imitating to flue gas and ammonia, makes it mix more evenly, and shortens the slow-down time, consequently can understand that other from rotating mixer 3 that can realize this type of function all can be used for the utility model discloses in, technical personnel in the field can carry out the adaptability according to size, shape and the material of using scene and test condition to from rotating mixer 3 and adjust.
The SCR reactor 4 is arranged perpendicular to the direction of the flue 1 and in a horizontal direction. It should be noted that the utility model discloses do not do particular requirement and special limitation to structural feature such as size, shape and material of SCR reactor 4, SCR reactor 4 is in the utility model provides an effect is to the mixture of flue gas and ammonia, carries out efficient catalytic reduction denitration reaction, consequently can understand that other SCR reactors 4 that can realize such function all can be used in the utility model discloses in, technical personnel in the art can carry out the adaptability according to size, shape and the material of using scene and test condition to SCR reactor 4 and adjust.
The self-rotating mixer 3 comprises a bracket 33, a rotating shaft 32 and a rotating blade 31, wherein the rotating shaft 32 perpendicular to the bracket 33 is arranged on the bracket 33, the other end of the rotating shaft 32 is connected with the rotating blade 31, and the rotating blade 31 faces the smoke. It should be noted that the present invention does not specifically require and limit the structural features such as the size, shape, and material of the bracket 33, and the bracket 33 functions to support the rotating shaft 32 and the rotating blade 31, so it can be understood that other brackets 33 capable of realizing such functions can be used in the present invention, and those skilled in the art can adjust the size, shape, and material of the bracket 33 adaptively according to the usage scenario and the test conditions.
The rotating shaft 32 is provided with at least two. It should be noted that the present invention does not specifically require and limit the structural features such as the size, shape, and material of the rotating shaft 32, and the rotating shaft 32 serves to support the rotating blades 31 and make them capable of changing directions, so it can be understood that other rotating shafts 32 capable of realizing such functions can be used in the present invention, and those skilled in the art can adjust the size, shape, and material of the rotating shaft 32 according to the use scenario and the test conditions.
The rotary blades 31 are provided with at least three. It should be noted that, the present invention does not make specific requirements and special limitations on the structural features such as the size, shape and material of the rotary blade 31, and the rotary blade 31 is used to strongly mix the mixture of flue gas and ammonia gas, so it can be understood that other rotary blades 31 capable of realizing such functions can be used in the present invention, and those skilled in the art can adjust the size, shape and material of the rotary blade 31 adaptively according to the use scene and the test conditions.
The applicant states that the above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceived by those skilled in the art within the technical scope of the present invention are all within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The utility model provides an ammonia mixing arrangement is spouted in SCR denitration, its characterized in that, the SCR denitration spouts ammonia mixing arrangement includes the flue, the one end of flue is the feed inlet, the flue includes first flue and the second flue of crooked connection, along flue gas flow direction and perpendicular to in the first flue the direction of flue has set gradually grid and autogyration blender, be provided with the SCR reactor in the second flue, the bottom of SCR reactor is provided with the discharge gate.
2. The SCR denitration ammonia-spraying mixing device of claim 1, wherein one end of the first flue is a feed inlet, and the other end of the first flue is in bent connection with the second flue.
3. The SCR denitration ammonia-injection mixing device of claim 1, wherein the feed inlet is of a tapered structure along the flow direction of flue gas.
4. The SCR denitration ammonia injection mixing device of claim 1, wherein the grid is an ammonia injection grid.
5. The SCR denitration ammonia injection mixing device of claim 1, wherein the grid is perpendicular to the direction of the flue and is arranged in a horizontal direction.
6. The SCR denitration ammonia-injection mixing device of claim 1, wherein the self-rotating mixer is perpendicular to the direction of the flue and is arranged in a horizontal direction.
7. The SCR denitration ammonia-injection mixing device of claim 1, wherein the SCR reactor is arranged in a horizontal direction perpendicular to the direction of the flue.
8. The SCR denitration ammonia-spraying mixing device of claim 1, wherein the self-rotating mixer comprises a support, a rotating shaft and rotating blades, the support is provided with the rotating shaft perpendicular to the support, the other end of the rotating shaft is connected with the rotating blades, and the rotating blades face flue gas.
9. The SCR denitration ammonia injection mixing device of claim 8, wherein the rotating shaft is provided with at least two.
10. The SCR denitration ammonia injection mixing device of claim 8, wherein the rotating blades are provided with at least three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554272.2U CN218166564U (en) | 2022-06-21 | 2022-06-21 | SCR denitration ammonia spraying mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221554272.2U CN218166564U (en) | 2022-06-21 | 2022-06-21 | SCR denitration ammonia spraying mixing device |
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| Publication Number | Publication Date |
|---|---|
| CN218166564U true CN218166564U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221554272.2U Active CN218166564U (en) | 2022-06-21 | 2022-06-21 | SCR denitration ammonia spraying mixing device |
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| CN (1) | CN218166564U (en) |
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- 2022-06-21 CN CN202221554272.2U patent/CN218166564U/en active Active
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