CN210171174U - Frequency modulation type intelligent ammonia control device - Google Patents
Frequency modulation type intelligent ammonia control device Download PDFInfo
- Publication number
- CN210171174U CN210171174U CN201920496854.1U CN201920496854U CN210171174U CN 210171174 U CN210171174 U CN 210171174U CN 201920496854 U CN201920496854 U CN 201920496854U CN 210171174 U CN210171174 U CN 210171174U
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- Prior art keywords
- ammonia
- layer
- control device
- expansion joint
- air preheater
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 54
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000003245 coal Substances 0.000 claims description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 230000001174 ascending effect Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a frequency modulation formula intelligence accuse ammonia device, including the economizer, the bottom of economizer is connected with the ash bucket, one side of ash bucket is connected with the ascending expansion joint of slope, the other end of expansion joint is connected with the blender, the top inboard of expansion joint is installed and is annotated ammonia grid, the guide plate is installed to the inboard top of blender, install the rectification layer in proper order in the blender of guide plate below, operation layer and reserve layer, blender one side of reserve layer bottom is connected with the discharge pipe, the below of discharge pipe is connected with the air preheater, the below of air preheater is connected with the contact tube, a fan is installed to the below of contact tube. The utility model is used for thermal power factory's low temperature deNOx systems can effectual improvement denitration efficiency and the utilization ratio of ammonia, reduces the NOx content in the flue gas, reduces environmental pollution, avoids the air preheater to block up, is worth using widely.
Description
Technical Field
The utility model relates to an accuse ammonia technical field especially relates to a frequency modulation formula intelligence accuse ammonia device.
Background
With the continuous acceleration of electric power construction pace, environmental problems become a problem that people pay attention to gradually, and thermal power plants have a large amount of NO every dayxThe emission and denitration technology of the thermal power plant are more and more widely applied. At present, most of pulverized coal furnaces adopt a denitration technology of an SCR (selective catalytic reduction) reactor, and liquid ammonia is used as a reducing agent. According to the regulations of DL/T296 plus 2011 guide rule of flue gas denitration technology of thermal power plant, the mass concentration of ammonia escape is not more than 2.3mg/m3Actually for different SO3The concentrations, the required ammonia slip concentrations, were different. With the denitration of more and more units, the problem of high escape concentration of ammonia is more and more obvious.
At present, after a denitration system operates for a period of time, the flow field and NO at the inlet and the outlet of the denitration system arexThe concentration field can change to a certain extent, so that the content of NOx in flue gas in the existing SCR denitration system is high, an air preheater is blocked, and the escape amount of local ammonia is too large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a frequency modulation type intelligent ammonia control device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a frequency modulation formula intelligence accuse ammonia device, including the economizer, the bottom of economizer is connected with the ash bucket, one side of ash bucket is connected with the ascending expansion joint of slope, the other end of expansion joint is connected with the blender, the top inboard of expansion joint is installed and is annotated ammonia grid, the guide plate is installed to the inboard top of blender, install the rectification layer in proper order in the blender of guide plate below, operation layer and reserve layer, blender one side of reserve layer bottom is connected with the discharge pipe, the below of discharge pipe is connected with the air preheater, the below of air preheater is connected with the contact tube, the primary air fan is installed to the below of contact tube.
Preferably, the primary air fan is connected with a power supply device.
Preferably, the operation layer is a catalyst layer, and the inside of the catalyst layer contains a denitration catalyst.
Preferably, the ammonia injection grid comprises a plurality of groups of ammonia injection branch pipes, and each group of ammonia injection branch pipes is movably provided with a nozzle.
Preferably, flue gas is transported in the economizer, and the flue gas contains NOx.
Preferably, the interior of the ammonia injection grid is supplied with reducing agent ammonia.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the setting of ammonia injection grid, its required branch pipe quantity, nozzle quantity, the installation direction of ammonia injection direction and nozzle, shape etc. need design according to the result of CFD flow field numerical simulation to mix the maximization purpose, arrange the ammonia injection grid, improve the utilization ratio of denitration efficiency and ammonia.
(2) The arrangement of the guide plates, the number, the shape and the arrangement positions of the guide plates are designed in a one-to-one mode after CFD numerical simulation, so that the uniformity of a flow field can be effectively improved, the utilization efficiency of reducing agent ammonia is improved, the content of NOx in smoke is reduced, the environmental pollution is reduced, and the blockage of an air preheater is avoided.
The utility model discloses a low temperature deNOx systems for thermal power factory can effectual improvement denitration efficiency and the utilization ratio of ammonia, reduces the NOx content in the flue gas, reduces environmental pollution, avoids the air preheater to block up, is worth using widely.
Drawings
Fig. 1 is a schematic structural diagram of a frequency modulation type intelligent ammonia control device provided by the present invention;
fig. 2 is the structure schematic diagram of the ammonia injection grid of the frequency modulation type intelligent ammonia control device provided by the utility model.
In the figure: 1-ash bucket; 2-a coal economizer; 3-an expansion joint; 4-ammonia injection grid; 5-a mixer; 6-a deflector; 7-a rectifying layer; 8-running layer; 9-a standby layer; 10-an air preheater; 11-primary air blower.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a frequency modulation type intelligent ammonia control device comprises an economizer 2, wherein the bottom of the economizer 2 is connected with an ash bucket 1, one side of the ash bucket 1 is connected with an expansion joint 3 which inclines upwards, the other end of the expansion joint 3 is connected with a mixer 5, the inner side of the top end of the expansion joint 3 is provided with an ammonia injection grid 4, a guide plate 6 is arranged above the inner side of the mixer 5, a rectifying layer 7, an operating layer 8 and a standby layer 9 are sequentially arranged in the mixer 5 below the guide plate 6, one side of the mixer 5 at the bottom of the standby layer 9 is connected with a discharge pipe, the lower part of the discharge pipe is connected with an air preheater 10, the lower part of the air preheater 10 is connected with a discharge pipe, a primary air fan 11 is arranged below the discharge pipe, the primary air fan 11 is connected with a power supply device, the operating layer 8 is a catalyst layer, the inside of the catalyst layer contains, equal movable mounting has the nozzle on every group spouts the ammonia branch pipe, and 2 internal transportation of economizer have the flue gas, and the flue gas is inside to contain NOx, and the inside of annotating ammonia grid 4 is carried and is had reductant ammonia, the utility model is used for the low temperature deNOx systems of thermal power factory, can the utilization ratio of effectual improvement denitration efficiency and ammonia, reduce the NOx content in the flue gas, reduce environmental pollution, avoid air preheater 10 to block up, be worth using widely.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" 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" or "second" 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 specifically limited otherwise.
The working principle is as follows: flue gas from the economizer 2 enters the mixer 5 together with reducing agent ammonia from the ammonia injection grid 4 through the expansion joint 3 to be mixed, then changes the flow direction through the flow guide effect of the guide plate 6, enters the rectifying layer 7, then enters the catalyst layer, namely the operation layer 8, carries out denitration reaction, decomposes NOx in the flue gas, and then is discharged through the standby layer 9. The denitrated flue gas enters the air preheater 10 to heat air, and the NOx concentration is reduced, so that the air preheater 10 can be prevented from being blocked.
The utility model discloses a can obtain following implementation effect when using:
(1) the setting of ammonia injection grid 4, its required branch pipe quantity, nozzle quantity, the installation direction of ammonia injection direction and nozzle, shape etc. need design according to the result of CFD flow field numerical simulation to mix the maximization purpose, arrange ammonia injection grid 4, improve the utilization ratio of denitration efficiency and ammonia.
(2) The arrangement of the guide plates 6, the number, the shape and the arrangement positions of the guide plates are designed one by one after CFD numerical simulation, so that the uniformity of a flow field can be effectively improved, the utilization efficiency of reducing agent ammonia is improved, the content of NOx in smoke is reduced, the environmental pollution is reduced, and the blockage of the air preheater 10 is avoided.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A frequency modulation type intelligent ammonia control device comprises a coal economizer (2) and is characterized in that, the bottom of the coal economizer (2) is connected with an ash bucket (1), one side of the ash bucket (1) is connected with an expansion joint (3) inclining upwards, the other end of the expansion joint (3) is connected with a mixer (5), the inner side of the top end of the expansion joint (3) is provided with an ammonia injection grid (4), a guide plate (6) is arranged above the inner side of the mixer (5), a rectifying layer (7), an operating layer (8) and a standby layer (9) are sequentially arranged in the mixer (5) below the guide plate (6), one side of the mixer (5) at the bottom of the standby layer (9) is connected with a discharge pipe, the air preheater (10) is connected with the lower part of the discharge pipe, the delivery pipe is connected with the lower part of the air preheater (10), and the primary air fan (11) is installed below the delivery pipe.
2. A frequency-modulated intelligent ammonia control device according to claim 1, characterized in that the primary air fan (11) is connected with a power supply device.
3. A frequency-modulated intelligent ammonia control device according to claim 1, wherein the operation layer (8) is a catalyst layer, and the inside of the catalyst layer contains a denitration catalyst.
4. A frequency-modulated intelligent ammonia control device according to claim 1, wherein the ammonia injection grid (4) comprises a plurality of groups of ammonia injection branch pipes, and each group of ammonia injection branch pipes is movably provided with a nozzle.
5. A frequency-modulated intelligent ammonia control device according to claim 1, wherein flue gas is transported in the economizer (2), and the flue gas contains NOx therein.
6. A frequency-modulated intelligent ammonia control device according to claim 1, characterized in that the inside of the ammonia injection grid (4) is fed with reducing agent ammonia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496854.1U CN210171174U (en) | 2019-04-13 | 2019-04-13 | Frequency modulation type intelligent ammonia control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496854.1U CN210171174U (en) | 2019-04-13 | 2019-04-13 | Frequency modulation type intelligent ammonia control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210171174U true CN210171174U (en) | 2020-03-24 |
Family
ID=69830952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920496854.1U Active CN210171174U (en) | 2019-04-13 | 2019-04-13 | Frequency modulation type intelligent ammonia control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210171174U (en) |
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2019
- 2019-04-13 CN CN201920496854.1U patent/CN210171174U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210121 Address after: Room 2093, building 1, 605 Antai Road, Situan Town, Fengxian District, Shanghai, 201413 Patentee after: Shanghai Zhouhong Electric Power Engineering Technology Center Address before: Room 701, 110 Lane 1188, Guangfulin Road, Songjiang District, Shanghai Patentee before: Cheng Chen |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211227 Address after: 201802 room j12111, building 2, No. 4268, Zhennan Road, Jiading District, Shanghai Patentee after: SHANGHAI SURFER ELECTRIC TECHNOLOGY CO.,LTD. Address before: Room 2093, building 1, 605 Antai Road, Situan Town, Fengxian District, Shanghai, 201413 Patentee before: Shanghai Zhouhong Electric Power Engineering Technology Center |
|
| TR01 | Transfer of patent right |