CN1745882A - Self-adaption flow-field ammonia jetter - Google Patents
Self-adaption flow-field ammonia jetter Download PDFInfo
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- CN1745882A CN1745882A CN 200510041495 CN200510041495A CN1745882A CN 1745882 A CN1745882 A CN 1745882A CN 200510041495 CN200510041495 CN 200510041495 CN 200510041495 A CN200510041495 A CN 200510041495A CN 1745882 A CN1745882 A CN 1745882A
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- ammonia
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- jetter
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Abstract
A flow field adaptive ammonia spraying apparatus for denitrating the fume in electric power plant is composed of several ammonia gas injecting tubes with uniformly arranged ammonia gas spraying openings and arranged on the cross section of flue. Each ammonia gas-spraying opening is a slit and has an ammonia gas flow regulating valve consisting of left and right elastic diaphragms to form an ammonia gas channel. The drive force of said flow regulating valve is the flow speed difference between fume and ammonia gas.
Description
Technical field
The present invention relates to a kind of power-plant flue gas denitration or similar field are sprayed ammonia in flue gas device that is used for, 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 invention 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 invention 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
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 is a general structure schematic diagram of the present invention.
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 nitrogen jet mouth (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 |
|---|---|---|---|
| CNB2005100414953A CN100346866C (en) | 2005-08-16 | 2005-08-16 | Self-adaption flow-field ammonia jetter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100414953A CN100346866C (en) | 2005-08-16 | 2005-08-16 | Self-adaption flow-field ammonia jetter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1745882A true CN1745882A (en) | 2006-03-15 |
| CN100346866C CN100346866C (en) | 2007-11-07 |
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ID=36165699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100414953A Expired - Fee Related CN100346866C (en) | 2005-08-16 | 2005-08-16 | Self-adaption flow-field ammonia jetter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100346866C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829498A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Ammonia-spraying grille and design method thereof |
| CN102029103A (en) * | 2010-10-29 | 2011-04-27 | 中国神华能源股份有限公司 | Flow control device of pipeline |
| CN102166472A (en) * | 2011-02-25 | 2011-08-31 | 中环（中国）工程有限公司 | Spiral-flow type ammonia spraying device used for selective catalytic reduction (SCR) denitrification system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4728062A (en) * | 1985-11-12 | 1988-03-01 | Rca Corporation | Pivot actuated nutation damping for a dual-spin spacecraft |
| JPS62294423A (en) * | 1986-06-13 | 1987-12-21 | Agency Of Ind Science & Technol | Denitration apparatus for high-temperature exhaust gas |
| CN2176647Y (en) * | 1993-07-04 | 1994-09-14 | 西北轻工业学院真空技术研究所 | Vacuum comprehensive treatment equipment for processing "balei" tobacco |
| CN1116917C (en) * | 2001-01-17 | 2003-08-06 | 大连冰山集团有限公司 | Wet electron beam fume desulfurizing process |
-
2005
- 2005-08-16 CN CNB2005100414953A patent/CN100346866C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829498A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Ammonia-spraying grille and design method thereof |
| CN102029103A (en) * | 2010-10-29 | 2011-04-27 | 中国神华能源股份有限公司 | Flow control device of pipeline |
| CN102029103B (en) * | 2010-10-29 | 2013-04-24 | 中国神华能源股份有限公司 | Flow control device of pipeline |
| CN102166472A (en) * | 2011-02-25 | 2011-08-31 | 中环（中国）工程有限公司 | Spiral-flow type ammonia spraying device used for selective catalytic reduction (SCR) denitrification system |
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| Publication number | Publication date |
|---|---|
| CN100346866C (en) | 2007-11-07 |
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Granted publication date: 20071107 |
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