CN2832277Y - Flow field self-adaptive type ammonia spraying device - Google Patents
Flow field self-adaptive type ammonia spraying device Download PDFInfo
- Publication number
- CN2832277Y CN2832277Y CN 200520074526 CN200520074526U CN2832277Y CN 2832277 Y CN2832277 Y CN 2832277Y CN 200520074526 CN200520074526 CN 200520074526 CN 200520074526 U CN200520074526 U CN 200520074526U CN 2832277 Y CN2832277 Y CN 2832277Y
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- ammonia
- ammonia gas
- flue
- spraying
- flow rate
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Abstract
The utility model relates to a flow field self-adaptive type ammonia spraying device, which relates to a device for denitrifying for flue gas of power plants or spraying ammonia gas to flue gas of similar fields. The device is composed of a plurality of ammonia gas injection tubes (1) which are uniformly distributed with ammonia gas spraying holes (3), wherein the ammonia gas injection tubes (1) are arranged on a cross section of an air flue (2); each ammonia gas spraying hole (3) is provided with an ammonia gas flow adjusting valve (4); the ammonia gas spraying hole (3) is a narrow and long gap of the ammonia gas injection tube (1); the ammonia gas flow adjusting valve (4) is composed of a left elastic membrance and a right elastic membrance; a passageway between the left elastic membrance and the right elastic membrance is an ammonia gas spraying passage; the passage aligns the marrow and long gap of the ammonia gas injection tube (1). The device uses speed difference between flue gas flow rate and ammonia gas flow rate to result in pressure difference which is taken as driving force. The utility model achieves the purpose that the utility model controls the ammonia gas flow rate through changing area of an ammonia gas injection port by different flow rate of each part of the flue gas.
Description
Technical field
The utility model relates to a kind of power-plant flue gas denitration or similar field are sprayed ammonia in flue gas device that is used for, and more general ammonia-gas spraying device has stronger flow field adaptive capacity and better mixing ability.
Background technology
In present known this field, the ammonia injection apparatus is arranged in the gas approach of Benitration reactor, consider mainly when it is arranged that each spray ammonia mouth evenly distributes along cross section, flue flow field, the flow velocity that utilizes the valve that is arranged on the outside to regulate each spray ammonia mouth is considered the inhomogeneities in flue flow field.This system complex costliness, and the restriction that is subjected to system complexity can only be divided into the flue cross section the few some districts of quantity, the inhomogeneities of going to roughly to adapt to the flue flow field can not reach each spray ammonia mouth and all be complementary with the flue gas flow field at its place.
Summary of the invention
Technical problem: in order to overcome the problem that existing ammonia-gas spraying device exists, the utility model provides a kind of self-adaption flow-field ammonia jetter, this device can exist at flue gas flow field and guarantees the even distribution of ammonia in flue gas when inhomogeneous greatlyyer, can adapt to complicated flow field working environment.
Technical scheme: self-adaption flow-field ammonia jetter of the present utility model is arranged in by the some ammonia ascending pipes that have a uniform ammonia jet that institute constitutes on the cross section of flue, is provided with an ammonia flow control valve on each ammonia jet.The ammonia jet is one section long and narrow slit on the ammonia ascending pipe, the ammonia flow control valve be by about two flexible sheets constituted, about passageway between two flexible sheets be exactly the ammonia injection channel, this passage is aimed at the long and narrow slit on the ammonia ascending pipe.This structure utilize the speed difference between flue gas flow rate and the ammonia flow velocity and the pressure differential that causes as driving force, along with flue gas everywhere the difference of flow velocity change the area of ammonia jet to reach the purpose of control ammonia flow.This structure can be so that the ammonia jet sprays into ammonia in the high position of flue gas flow rate more like this, and reduces the ammonia straying quatity in the low position of flue gas flow rate, realizes the even distribution of ammonia in flue gas.Simultaneously, this structure can make the ammonia jet of ejection produce violent turbulent fluctuation, can accelerate the mixing diffusion of ammonia in flue gas.
Beneficial effect: self-adaption flow-field ammonia jetter can be realized the matched well of ammonia injection rate and local exhaust gas volumn, and the mixing of ammonia and flue gas, rapidly is for Benitration reactor provides desirable inlet flue gas condition.The general ammonia-gas spraying device of this ammonia-gas spraying device has stronger flow field adaptive capacity.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a general structure schematic diagram of the present utility model.
Fig. 2 is the local enlarged diagram of an ammonia jet 3.
Fig. 3 is that A-A among Fig. 2 is to generalized section.
Have among the figure: ammonia ascending pipe 1, flue 2, ammonia jet 3, ammonia flow control valve 4.
The specific embodiment
Evenly arrange some ammonia ascending pipes 1 on the cross section of flue 2, an end of ammonia ascending pipe 1 is connected with the ammonia house steward, and the other end is a cecum.This device is arranged in by the some ammonia ascending pipes 1 that have a uniform ammonia jet 3 that institute constitutes on the cross section of flue 2, is provided with an ammonia flow control valve 4 on each ammonia jet 3.Ammonia jet 3 is one section long and narrow slit on the ammonia ascending pipe 1, ammonia flow control valve 4 be by about two flexible sheets constituted, about passageway between two flexible sheets be exactly the ammonia injection channel, this passage is aimed at the long and narrow slit on the ammonia ascending pipe 1.Two flexible sheets that ammonia flow control valve 4 can be made by stainless steel are connected with 1 welding of ammonia ascending pipe or riveted joint.
When ammonia during from ammonia jet 3 ejection, the speed of ammonia is very fast, and flue gas flow rate on every side is relatively low, so there is a speed difference between the two.According to energy equation, the little then pressure of speed is big, and speed greatly then pressure is little, therefore in the both sides of diaphragm a pressure reduction is just arranged.This pressure reduction makes diaphragm inwardly shrink, and causes the variation of ammonia circulation area.At the flue gas flow rate higher position, the speed difference of ammonia and flue gas is less, and caused pressure reduction is also less, and the ammonia injection channel changes little, and the ammonia straying quatity is more; And in the flue gas flow rate lower, the speed difference of ammonia and flue gas is bigger, and caused pressure reduction is smaller, and the ammonia injection channel diminishes, and the ammonia straying quatity also reduces thereupon.Ammonia flow control valve 4 utilize the speed difference between flue gas flow rate and the ammonia flow velocity and the pressure differential that causes as driving force, can according to flue gas everywhere the difference of the flow velocity area that changes the ammonia jet reach the purpose of control ammonia flow.
Ammonia flow control valve 4 itself is disturbing a property structure, can produce violent turbulent fluctuation when ammonia sprays, and can accelerate the mixing diffusion of ammonia in flue gas.
Claims (2)
1, a kind of self-adaption flow-field ammonia jetter, it is characterized in that this device be arranged in by the some ammonia ascending pipes (1) that have a uniform ammonia jet (3) on the cross section of flue (2) constitute, on each ammonia jet (3), be provided with an ammonia flow control valve (4).
2, self-adaption flow-field ammonia jetter according to claim 1, it is characterized in that ammonia jet (3) is one section long and narrow slit on the ammonia ascending pipe (1), ammonia flow control valve (4) be by about two flexible sheets constituted, about passageway between two flexible sheets be exactly the ammonia injection channel, this passage is aimed at the long and narrow slit on the ammonia ascending pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074526 CN2832277Y (en) | 2005-08-16 | 2005-08-16 | Flow field self-adaptive type ammonia spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520074526 CN2832277Y (en) | 2005-08-16 | 2005-08-16 | Flow field self-adaptive type ammonia spraying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2832277Y true CN2832277Y (en) | 2006-11-01 |
Family
ID=37196594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520074526 Expired - Fee Related CN2832277Y (en) | 2005-08-16 | 2005-08-16 | Flow field self-adaptive type ammonia spraying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2832277Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450278B (en) * | 2008-12-22 | 2011-04-06 | 西安热工研究院有限公司 | Whole wing type current sharing and partition adjustable ammonia-gas spraying device |
-
2005
- 2005-08-16 CN CN 200520074526 patent/CN2832277Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450278B (en) * | 2008-12-22 | 2011-04-06 | 西安热工研究院有限公司 | Whole wing type current sharing and partition adjustable ammonia-gas spraying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061101 Termination date: 20090916 |