CN2889465Y - Enforced mixing device for preventing wear and vortex street for ammonia-spraying grid - Google Patents
Enforced mixing device for preventing wear and vortex street for ammonia-spraying grid Download PDFInfo
- Publication number
- CN2889465Y CN2889465Y CN 200620073007 CN200620073007U CN2889465Y CN 2889465 Y CN2889465 Y CN 2889465Y CN 200620073007 CN200620073007 CN 200620073007 CN 200620073007 U CN200620073007 U CN 200620073007U CN 2889465 Y CN2889465 Y CN 2889465Y
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- ammonia
- spraying
- abrasionproof
- vortex street
- spraying grid
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Abstract
The utility model relates to an anti-wearing vortex street strong mixing device of ammonia-spraying grid for selective catalytic reduction (SCR) flue gas denitration device used in thermoelectric generating set boiler, refuse burning device, diesel engine, etc. The anti-friction vortex street strong mixing device comprises a plurality of ammonia-spraying tubes (2) arranged in the flue (1), the upper end of the ammonia-spraying tubes (2) is connected with ammonia-gas mixed gas supplying main tube, and the low end of the ammonia-spraying tubes (2) is blind end; and each ammonia-spraying tubes (2) is provided with a valve capable of independently controlling the flow rate. The ammonia-spraying tube (2) uses a metal tube (3) as the main body, a plurality of ammonia spraying holes (4) with different diameters are opened on the metal tube (3), the size of each ammonia spraying hole (4) is substantially and directly proportional to the average velocity of the local flue gas around the ammonia spraying hole (4). A metal-made anti-wearing burbling element is arranged at the windward side of the metal pipe bundle of the ammonia-spraying grid to resist the erosion of the flying ash and reduce the wearing rate of the metal pipe bundle of the ammonia-spraying grid.
Description
Technical field
The utility model relates to a kind of abrasionproof, enhancing disturbance mixing arrangement that is used for tail gas selective catalytic reducing method (SCR) equipment for denitrifying flue gas such as thermal power generation unit boiler, garbage combustion device, diesel engine with ammonia-spraying grid, belongs to the technical field of environmental protection equipment.
Background technology
Selective catalytic reduction is that to remove in the boiler exhaust gas the most common while of nitrogen oxide also be effective method the most, is widely used in each commercial plant.Its cardinal principle is to adopt liquefied ammonia or ammoniacal liquor as reducing agent, with its with spray in the flue of SCR reactor upstream after air mixes, under the effect of catalyst with flue gas in nitrogen oxide react the harmless nitrogen G﹠W discharge system of generation.Wherein ammonia and nitrogen oxide mix and the distribution effect is one of key factor that influences denitrating flue gas efficient, what generally adopt at present is the method for ammonia-spraying grid, be about to the flue cross section and be divided into 20-50 control area that varies in size, there are several spray-holes in each zone, the flow of each subregion is adjustable separately, with the CONCENTRATION DISTRIBUTION of NOx in the coupling flue gas.The metal tube bank that has some and diameter aperture on ammonia-spraying grid adopts is usually formed, and the metal tube bank is vertical with the flow direction of flue gas.Owing to contain the dust of suitable concentration in the flue gas, thereby the wearing and tearing of ammonia-spraying grid tube bank are problems that merits attention, and can influence the distribution effect of ammonia and flue gas and then influence denitration efficiency when serious.Depend on simultaneously the spontaneous diffusion of flue gas and ammonia purely, a little less than the disturbance excessively, mixed effect is relatively poor, and required mixing distance is long partially.
Summary of the invention
Technical problem: in order to overcome the defective of existing denitrating system ammonia-spraying grid, the utility model proposes a kind of ammonia-spraying grid abrasionproof, vortex street loads in mixture by force and puts, this device can solve the wear problem of above-mentioned ammonia-spraying grid preferably.And can form stable vortex street in the downstream of abrasionproof turbulent element, thus adding strong disturbance, enhancing ammonia mixes with flue gas, improves denitration efficiency.
Technical scheme: the ammonia-spraying grid abrasionproof that the utility model proposed, vortex street load in mixture by force and put is that windward side side in ammonia-spraying grid metal tube bank adds the abrasionproof turbulent element that antifriction metal (AFM) is made, with washing away of tolerance flying dust, reduce the rate of depreciation of ammonia-spraying grid metal tube bank.Simultaneously, flue gas can form stable vortex street in the downstream of this abrasionproof turbulent element, thereby adds strong disturbance, and enhancing ammonia mixes with flue gas.
Be specially: this device is arranged in the flue by some amonia adjutages, and the upper end of amonia adjutage is connected with ammonia, air gas mixture supply main, and the lower end then is a cecum; Every amonia adjutage or some amonia adjutages are furnished with the valve that a flow can be regulated separately.Amonia adjutage has the ammonia spray-hole that some diameters do not wait based on metallic conduit on metallic conduit, the size of each ammonia spray-hole roughly is directly proportional with the average speed of the local flue gas of ammonia spray-hole.Side is provided with the abrasionproof turbulent element in the windward side of metallic conduit, and the abrasionproof turbulent element is connected by supporting construction with metallic conduit.The abrasionproof turbulent element is an angle steel, and the angle at angle steel top is 60～120 °, and the zigzag of rule is made in both sides, is used to form stable vortex street, and the abrasionproof turbulent element is the structure that runs through flue, and length and metallic conduit quite or are slightly grown.
Beneficial effect: the ammonia-spraying grid abrasionproof that the utility model proposed, vortex street load in mixture by force puts the rate of depreciation that can reduce the tube bank of ammonia-spraying grid metal.Simultaneously can form stable vortex street in the downstream of this abrasionproof turbulent element, thereby add strong disturbance, enhancing ammonia mixes with flue gas, improves denitration efficiency.
Description of drawings
Fig. 1 is an overall structural arrangement schematic diagram of the present utility model.
Fig. 2 is the partial structurtes schematic diagram of an amonia adjutage.
Fig. 3 is that A-A among Fig. 2 is to generalized section.
Fig. 4 is the detail of construction of abrasionproof turbulent element 6 among Fig. 2 and Fig. 3.
All have among the above figure: flue 1, amonia adjutage 2, metallic conduit 3, ammonia spray-hole 4, supporting construction 5, abrasionproof turbulent element 6.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and example.
Example of the present utility model such as Fig. 1 are furnished with some amonia adjutages 2 on the cross section of flue 1, an end of amonia adjutage 2 is connected with ammonia air gas mixture supply main, and the other end then is a cecum.Every amonia adjutage 2 or some amonia adjutages 2 are furnished with valve, and its flow can be regulated separately.Amonia adjutage 2 is made by metallic conduit, has the ammonia spray-hole 4 that some diameters do not wait on the pipeline, and the size of each ammonia spray-hole 4 roughly is directly proportional with the average speed of ammonia spray-hole 4 local flue gases.Side is provided with abrasionproof turbulent element 6 in the windward side of metallic conduit 3, and abrasionproof turbulent element 6 is connected by supporting construction 5 with metallic conduit 3.Abrasionproof turbulent element 5 is an angle steel, and the angle at angle steel top is 60～120 °, and the zigzag of rule is made in the end, is used to form stable vortex street.Abrasionproof turbulent element 6 is for running through the structure of flue, and length and metallic conduit 3 quite or are slightly grown, and two ends fix with flue respectively.Supporting construction 5 is mainly used in fixedly abrasionproof turbulent element 6 and metallic conduit 3, make it form certain rigidity, both can adopt the structure that runs through flue, also can adopt the structure of interruption, the two ends of supporting construction 5 are connected with metallic conduit 3 with abrasionproof turbulent element 6 respectively, and are shown in the drawings for running through the structure of flue.This ammonia-spraying grid abrasionproof, vortex street load in mixture by force puts the rate of depreciation that can reduce the tube bank of ammonia-spraying grid metal.Simultaneously can form stable vortex street in the downstream of this abrasionproof turbulent element 6, thereby add strong disturbance, enhancing ammonia mixes with flue gas, improves denitration efficiency.
Claims (4)
1, a kind of ammonia-spraying grid abrasionproof, vortex street load in mixture by force and put, and it is characterized in that this device is arranged in the flue (1) by some amonia adjutages (2), and the upper end of amonia adjutage (2) is connected with ammonia, air gas mixture supply main, and the lower end then is a cecum; Every amonia adjutage (2) or some amonia adjutages (2) are furnished with the valve that a flow can be regulated separately.
2, ammonia-spraying grid abrasionproof according to claim 1, vortex street load in mixture by force to put and it is characterized in that amonia adjutage (2) is based on metallic conduit (3), have the ammonia spray-hole (4) that some diameters do not wait on metallic conduit (3), the size of each ammonia spray-hole (4) roughly is directly proportional with the average speed of the local flue gas of ammonia spray-hole (4).
3, ammonia-spraying grid abrasionproof according to claim 1 and 2, vortex street load in mixture by force and put the windward side side that it is characterized in that at metallic conduit (3) and be provided with abrasionproof turbulent element (6), and abrasionproof turbulent element (6) is connected by supporting construction (5) with metallic conduit (3).
4, ammonia-spraying grid abrasionproof according to claim 1, vortex street load in mixture by force to put and it is characterized in that abrasionproof turbulent element (6) is an angle steel, the angle at angle steel top is 60～120 °, both side ends is made the zigzag of rule, be used to form stable vortex street, abrasionproof turbulent element (6) is for running through the structure of flue, and length and metallic conduit (3) quite or are slightly grown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620073007 CN2889465Y (en) | 2006-04-29 | 2006-04-29 | Enforced mixing device for preventing wear and vortex street for ammonia-spraying grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620073007 CN2889465Y (en) | 2006-04-29 | 2006-04-29 | Enforced mixing device for preventing wear and vortex street for ammonia-spraying grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2889465Y true CN2889465Y (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620073007 Expired - Fee Related CN2889465Y (en) | 2006-04-29 | 2006-04-29 | Enforced mixing device for preventing wear and vortex street for ammonia-spraying grid |
Country Status (1)
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| CN (1) | CN2889465Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103768940A (en) * | 2014-02-19 | 2014-05-07 | 东南大学 | Ammonia spraying and uniform-mixing device capable of automatically adjusting ammonia flow based on amount of flue gas |
| CN104190238A (en) * | 2014-09-17 | 2014-12-10 | 山东志伟电子科技有限公司 | Reverse multi-point swirl-injection denitrating device |
-
2006
- 2006-04-29 CN CN 200620073007 patent/CN2889465Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103768940A (en) * | 2014-02-19 | 2014-05-07 | 东南大学 | Ammonia spraying and uniform-mixing device capable of automatically adjusting ammonia flow based on amount of flue gas |
| CN104190238A (en) * | 2014-09-17 | 2014-12-10 | 山东志伟电子科技有限公司 | Reverse multi-point swirl-injection denitrating device |
| CN104190238B (en) * | 2014-09-17 | 2016-03-23 | 山东志伟电子科技有限公司 | Reverse multiple spot swirl injection denitrification apparatus |
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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: 20070418 Termination date: 20100429 |