CN104524958A - Concentrated ammonia water online dilution device for SNCR denitration system - Google Patents
Concentrated ammonia water online dilution device for SNCR denitration system Download PDFInfo
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- CN104524958A CN104524958A CN201510038099.9A CN201510038099A CN104524958A CN 104524958 A CN104524958 A CN 104524958A CN 201510038099 A CN201510038099 A CN 201510038099A CN 104524958 A CN104524958 A CN 104524958A
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Abstract
The invention discloses a concentrated ammonia water online dilution device for an SNCR denitration system. The concentrated ammonia water online dilution device comprises a diluter consisting of a shell and a center pipe at the longitudinal center of the shell, wherein an inlet pipe communicated with an inner cavity of the shell is arranged on the upper part of the outer wall of the shell, the lower end of the center pipe is an open end, and the upper end of the center pipe is connected with an outlet pipe communicated with a spray gun in a boiler furnace. The upper end of the shell is closed, and the lower end of the shell is connected with a slag storage pipe; a dilution water inlet is formed in the front end of the inlet pipe, a nozzle for spraying concentrated ammonia water into the inlet pipe is arranged on the side wall of the inlet pipe, dilution water and concentrated ammonia water are mixed and then enter a cavity between the shell and the center pipe to flow downwards in vortex, and after being further mixed, the mixture enters the center pipe, then is transferred into the outlet pipe, and finally enters the spray gun of the furnace for spray atomization. Paths for circulation of diluted ammonia water are all cavities, so that only very low pipeline loss can be caused, and the flowing speed of the mixture entering the gun spray is high, so that the atomization effect during the spraying of the gun spray is improved, and the denitration rate of the system for flue gas is improved. The cavity between the shell and the center pipe can also be used for removing impurities in the diluted ammonia water, thus avoiding clogging of the nozzle of the spray gun.
Description
Technical field
The present invention relates to a kind of SNCR denitration system, be specifically related to the concentrated ammonia liquor on-line dilution device in a kind of SNCR denitration system.
Background technology
SNCR denitration take boiler furnace as denitration reaction device, sprays into dilute ammonia solution the temperature range of 850 DEG C to 1100 DEG C, and outsourcing ammonia concn is about 20%, and needing to be diluted to concentration is before ejecting 10%.
Current SNCR denitration ammoniacal liquor air mix facilities substantially adopts double-skin duct formula or in pipeline, arranges the structure of hybrid blade, there is two problems in them: is first that SR is excessive, the resistance that resistance between double-skin duct and pipeline intra vane cause liquid flow, can make the weak aqua ammonia jeting effect after dilution influenced; Next is that impurity in dilution water and ammoniacal liquor can not be filtered before the nozzle entering burner hearth spray gun, and Long-Time Service can make nozzle easily accumulate impurity in solution and plug nozzle, reduces the atomizing effect that nozzle sprays weak aqua ammonia further.
Summary of the invention
The object of the present invention is to provide the concentrated ammonia liquor on-line dilution device that a kind of stable performance, resistance are little, improve burner hearth lance ejection weak aqua ammonia effect, improve SNCR denitration system to the denitration rate of flue gas.
The invention discloses a kind of concentrated ammonia liquor on-line dilution device for SNCR denitration system, comprise the diluter be made up of with the central tube of its longitudinal center housing, the inlet tube being communicated with its inner chamber is arranged at housing exterior walls top, the lower end of central tube is openend, upper end is connected with the outlet be communicated with spray gun in boiler furnace, the upper end closed of housing, lower end is connected with slag storage tube, and the front end of inlet tube is dilution water entrance, spray the ammonia spray nozzle of concentrated ammonia liquor in the oriented dilution water flow of sidewall.
Described housing is formed by connecting up and down by cylinder and taper shape bucket, the upper surface that lower end is stretched in conical bucket, cylinder is passed in upper end of central tube.
Described inlet tube is square tube, along the tangential connection of described cylinder outer wall.
Described ammonia spray nozzle has two rows, is symmetrically arranged in the arranged on left and right sides of inlet tube front end.
The lower end inner wall of described slag storage tube has been threaded connection plug.
The present invention respectively arranges row's nozzle at inlet tube perpendicular to the both sides of dilution water flow and spray into concentrated ammonia liquor in dilution water flow, ensure to realize between two side nozzles spraying making up mutually of coverage rate, non-blind area injection can be carried out to dilution water flow, realize the uniformity of ammoniacal liquor dilution mixture.The cavity mesoscale eddies tangentially entered between housing and central tube along housing after concentrated ammonia liquor and dilution water mix in inlet tube is descending, further reinforcement mixed effect, then up continuation mixing is wherein entered from the lower end of central tube, proceed to outlet from the top of central tube, finally enter the lance ejection atomization being arranged on boiler furnace and realize SNCR denitration reaction.
Said structure makes concentrated ammonia liquor from entering dilution to the lance ejection atomization entering boiler furnace, the path of mixed solution circulation is all cavity, without any obstacle, do not increase extra resistance, only has pipeline loss, with traditional inside and outside tubular type ammoniacal liquor blender compare with built-in vane type ammoniacal liquor blender, energy loss on whole circulation path is very little, the flow velocity entered in burner hearth in spray gun is fast, improve atomizing effect when spray tip sprays, thus improve system to the denitration rate of flue gas.
While the cavity mesoscale eddies of mixed solution between housing and central tube is descending, impurity in solution is thrown on the inwall of housing due to the effect of centrifugal force, then under the effect of self gravitation, spiral decline enters in slag storage tube after taper shape bucket gradually, the nozzle that dilute ammonia solution after removal of impurities avoids spray gun gets clogged, further raising nozzle sprays atomizing effect during weak aqua ammonia, thus improve further the denitration rate of flue gas, extend spray gun service life.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the present invention's example.
Fig. 2 is the schematic top plan view of Fig. 1.
Fig. 3 is the layout schematic diagram of inlet tube inner nozzle in Fig. 1.
Detailed description of the invention
As shown in Figure 1 to Figure 3, the invention discloses a kind of concentrated ammonia liquor on-line dilution device for SNCR denitration system, comprise housing 1, inlet tube 2, central tube 3, outlet 4, slag storage tube 5 and plug 6.Housing 1 is formed by connecting by cylinder 11 and conical bucket about 12, and the upper end of cylinder 11 is blind end.Inlet tube 2 is square tube, along the tangential connection of cylinder 11 outer wall, with the inner space of cylinder 11.Central tube 3 is positioned at the axial centre of housing 1, the upper surface that its lower end is stretched in conical bucket 12, cylinder 11 is passed in upper end.Outlet 4 is connected to the upper end of central tube 3, and its port of export is communicated with the spray gun in boiler furnace.Slag storage tube 5 is connected to the port of export of conical bucket 12, and its lower end inner wall is threaded connection plug 6.The front end of inlet tube 2 is dilution water entrance, the external symmetry of arranged on left and right sides wall is furnished with concentrated ammonia liquor pipe 7, on ammonia water pipe 7, corresponding import pipeline section is connected with some taps 8 stretched in inlet tube 2, the end of tap 8 connects nozzle 9, the cross section that the layout of nozzle 9 covers inlet tube 2 with effective spray regime 100% of two side nozzles is as the criterion, and ensures that dilution water fully mixes with 100% of concentrated ammonia liquor.
Mixed solution is tangentially to enter in the cavity between central tube outer wall and inner walls, in this cavity, the stroke of mixed solution is vortex shape, while reinforcement mixed effect, the proportion impurity different from liquid is then because the effect of centrifugal force is thrown to inner walls, spiral drops in the slag storage tube of conical bucket lower end gradually under gravity, realize the effect of removal of contamination, prevent the spray tip in boiler furnace from being blocked by impurity.Weak ammonia solution after removal of contamination enters in central tube and continues to be folded to after mixing reaches design concentration to enter outlet, finally enters the lance ejection atomization being arranged on boiler furnace and realizes SNCR denitration reaction.
Said structure of the present invention makes concentrated ammonia liquor from entering dilution to the lance ejection atomization entering boiler furnace, mixing material circulates along rational path, without any obstacle, with traditional inside and outside tubular type ammoniacal liquor blender compare with built-in vane type ammoniacal liquor blender, the SR of mixing material reduces greatly, thus improves follow-up denitration effect.Achieve the function removing impurity in mixing material at centrifugal force and Action of Gravity Field, the impurity avoided in mixing material blocks the hidden danger of spray gun in boiler furnace simultaneously.Impurity in slag storage tube is removed by dismounting plug.
Claims (5)
1. the concentrated ammonia liquor on-line dilution device for SNCR denitration system, it is characterized in that: this device comprises the diluter be made up of with the central tube of its longitudinal center housing, the inlet tube being communicated with its inner chamber is arranged at housing exterior walls top, the lower end of central tube is openend, upper end is connected with the outlet be communicated with spray gun in boiler furnace, the upper end closed of housing, lower end is connected with slag storage tube, and the front end of inlet tube is dilution water entrance, spray the ammonia spray nozzle of concentrated ammonia liquor in the oriented dilution water flow of sidewall.
2. as claimed in claim 1 for the concentrated ammonia liquor on-line dilution device of SNCR denitration system, it is characterized in that: described housing is formed by connecting up and down by cylinder and taper shape bucket, the upper surface that lower end is stretched in conical bucket, cylinder is passed in upper end of central tube.
3., as claimed in claim 2 for the concentrated ammonia liquor on-line dilution device of SNCR denitration system, it is characterized in that: described inlet tube is square tube, along the tangential connection of described cylinder outer wall.
4., as claimed in claim 1 for the concentrated ammonia liquor on-line dilution device of SNCR denitration system, it is characterized in that: described ammonia spray nozzle has two rows, be symmetrically arranged in the arranged on left and right sides of inlet tube front end.
5., as claimed in claim 1 for the concentrated ammonia liquor on-line dilution device of SNCR denitration system, it is characterized in that: the lower end inner wall of described slag storage tube has been threaded connection plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038099.9A CN104524958B (en) | 2015-01-27 | 2015-01-27 | For the concentrated ammonia liquor on-line dilution device of SNCR denitrating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038099.9A CN104524958B (en) | 2015-01-27 | 2015-01-27 | For the concentrated ammonia liquor on-line dilution device of SNCR denitrating system |
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| Publication Number | Publication Date |
|---|---|
| CN104524958A true CN104524958A (en) | 2015-04-22 |
| CN104524958B CN104524958B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510038099.9A Active CN104524958B (en) | 2015-01-27 | 2015-01-27 | For the concentrated ammonia liquor on-line dilution device of SNCR denitrating system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120281A (en) * | 1978-03-13 | 1979-09-18 | Kawasaki Steel Co | Removing of water soluble harmful gas |
| CN1669631A (en) * | 2005-01-31 | 2005-09-21 | 清华大学 | Liquid-liquid fast-mixing reactor |
| CN201423316Y (en) * | 2009-06-22 | 2010-03-17 | 陆飞浩 | gas-liquid separator |
| CN102304381A (en) * | 2011-08-05 | 2012-01-04 | 太原理工大学 | Combined type coal tar recovery equipment and coal tar recovery method using same |
| CN203389783U (en) * | 2013-07-01 | 2014-01-15 | 江苏亿金环保科技股份有限公司 | Denitration spray gun |
| CN204447713U (en) * | 2015-01-27 | 2015-07-08 | 湖南麓南脱硫脱硝科技有限公司 | For the concentrated ammonia liquor on-line dilution device of SNCR denitration system |
-
2015
- 2015-01-27 CN CN201510038099.9A patent/CN104524958B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54120281A (en) * | 1978-03-13 | 1979-09-18 | Kawasaki Steel Co | Removing of water soluble harmful gas |
| CN1669631A (en) * | 2005-01-31 | 2005-09-21 | 清华大学 | Liquid-liquid fast-mixing reactor |
| CN201423316Y (en) * | 2009-06-22 | 2010-03-17 | 陆飞浩 | gas-liquid separator |
| CN102304381A (en) * | 2011-08-05 | 2012-01-04 | 太原理工大学 | Combined type coal tar recovery equipment and coal tar recovery method using same |
| CN203389783U (en) * | 2013-07-01 | 2014-01-15 | 江苏亿金环保科技股份有限公司 | Denitration spray gun |
| CN204447713U (en) * | 2015-01-27 | 2015-07-08 | 湖南麓南脱硫脱硝科技有限公司 | For the concentrated ammonia liquor on-line dilution device of SNCR denitration system |
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| Publication number | Publication date |
|---|---|
| CN104524958B (en) | 2016-05-11 |
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