CN205746935U - A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation - Google Patents
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation Download PDFInfo
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- CN205746935U CN205746935U CN201620518422.2U CN201620518422U CN205746935U CN 205746935 U CN205746935 U CN 205746935U CN 201620518422 U CN201620518422 U CN 201620518422U CN 205746935 U CN205746935 U CN 205746935U
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- chimney
- preheater
- hot air
- air duct
- boiler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation, burner and chimney are separately mounted to boiler body both sides, on chimney, it is sequentially installed with energy-saving appliance to chimney top steam vent from chimney and boiler body junction, condenser and preheater, it is additionally provided with hot air duct, hot air duct one end is connected with burner, first pipeline one end is arranged on chimney above first order preheater, the other end is connected with hot air duct, first pipeline is provided with recirculation blower, second pipe one end is connected with preheater, the other end is connected with hot air duct, second pipe is provided with aerator, preheater is provided with cold wind import.This utility model is simple, efficiently, the technical method of the reductions NOx emission of small investment, and obtain relevant test data and prove the feasibility of this technology, be prominent heavy in terms of environmental protection development prospect of current larger gas boiler.
Description
Technical field
This utility model relates to central heating appliance manufacturing technology field, especially a kind of reduction gas fired-boiler burner hearth nitrogen oxygen
The flue gas recirculation structure that compound generates.
Background technology
Along with the enhancing of current national environmental protection dynamics, and the generally raising of common people's environmental consciousness, especially Beijing area 30-
80mg/Nm3The execution by stages of NOx (NOx refers to oxynitride contained in flue gas) discharge index, promotes whole combustion gas to supply
Warm industry reduces NOx emission trend, and traditional gas fired-boiler cannot meet the requirement of the most relatively low discharge index.
Utility model content
This utility model, for the deficiencies in the prior art, proposes a kind of cigarette reducing gas fired-boiler burner hearth NO_x formation
Gas recirculation structure, simple, efficiently, the technical method of the reductions NOx emission of small investment, and obtain the test data being correlated with and prove
The feasibility of this technology, is the current larger gas boiler prominent weight in terms of environmental protection development prospect.
In order to realize above-mentioned utility model purpose, this utility model offer techniques below scheme:
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation, including burner, boiler body,
Chimney, energy-saving appliance, condenser and preheater,
Described burner and described chimney are separately mounted to described boiler body both sides,
On described chimney, pacify successively to described chimney top steam vent with described boiler body junction from described chimney
Equipped with described energy-saving appliance, condenser and preheater,
Being additionally provided with hot air duct, described hot air duct one end is connected with described burner,
First pipeline one end is arranged on described chimney and is positioned at above described preheater, the other end and described hot air duct
Connect, described first pipeline be provided with recirculation blower,
Second pipe one end is connected with described preheater, the other end is connected with described hot air duct, at described second pipe
On described aerator is installed,
Described preheater is provided with cold wind import.
Further, described chimney is vertically arranged, and described hot air duct is arranged on below described boiler body.
Further, described hot air duct is embedded in underground.
Further, described burner has two, and vertical array is on described boiler body.
Further, described preheater has two, vertical array on described chimney, described preheater above with
Described cold wind import connects, is positioned at the described preheater of lower section and is connected with described second pipe.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation of this utility model, simple, efficient,
The technical method of the reduction NOx emission of small investment, and obtain relevant test data and prove the feasibility of this technology, it is current big
The type gas fired-boiler prominent weight in terms of environmental protection development prospect.
Accompanying drawing explanation
Fig. 1 is a kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation described in the utility model
Schematic diagram, wherein, arrow represents the flow direction of cigarette, gas or smoke mixture.
Detailed description of the invention
Being described in detail this utility model below in conjunction with the accompanying drawings, the description of this part is only exemplary and explanatory,
Protection domain of the present utility model should there be is not any restriction effect.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation as shown in Figure 1, including burning
Device 1, boiler body 2, chimney 3, energy-saving appliance 4, condenser 5 and preheater 6,
Burner 1 and chimney 3 are separately mounted to boiler body 2 both sides,
Be sequentially installed with on chimney 3, from chimney 3 and boiler body 2 junction to chimney 3 top steam vent energy-saving appliance 4,
Condenser 5 and preheater 6,
Being additionally provided with hot air duct 7, hot air duct 7 one end is connected with burner 1,
First pipeline 11 one end is arranged on chimney 3 and is positioned at above preheater 6, the other end is connected with hot air duct 7,
On first pipeline 11, recirculation blower 12 is installed, in the first pipeline 11 and chimney 3 junction, regulation valve 10 is installed,
Second pipe 8 one end is connected with preheater 6, the other end is connected with hot air duct 7, is provided with on second pipe 8
Aerator 9,
Preheater 6 is provided with cold wind import.
Chimney 3 is vertically arranged, and hot air duct 7 is arranged on below boiler body 2.
Hot air duct 7 is embedded in ground less than 100.
Burner 1 has two, and vertical array is on boiler body 2, to meet flame height in boiler body 2 burner hearth
It is full of and uniform.
Energy-saving appliance 4 has two, horizontally arranged on chimney 3.
Preheater 6 has two, and vertical array is on chimney 3, and preheater 6 above is connected with cold wind import, is positioned at
The preheater 6 of lower section is connected with second pipe 8.
In the present embodiment, energy-saving appliance 4 is water-cooling type energy-saving appliance, and condenser 5 is water-cooling type condenser.
During use, the design of boiler body 2 furnace volume heat release rate is far below the 500KW/m needed for super low nitrogen burning3Want
Ask, reach 377KW/m3.Cold air cold wind import from preheater 6 enters second pipe 8, and then enters hot air duct 7, then
Entered inside boiler body 2 burner hearth by burner 1.Flue gas is outwards discharged by chimney 3 from boiler body 2, and flue gas is through celebrating a festival
After energy device 4 and condenser 5, temperature is about at 45 DEG C, and the flue gas that there are about 10-20% passes through recirculation blower 12 through the first pipeline 11
In the hot air duct 7 being incorporated into elevated pressures that (stainless steel impeller and casing improve corrosion resistance) and regulation valve 10 are controlled, and
Entering into after mixing with hot blast in burner 1 sprays into boiler body 2 burner hearth and participate in combustion process, this sprays into exhaust gas volumn is according to combustion
Burn the feedback informations such as loading, fume emission oxygen content, flue gas NOx emissions data, automatically adjusted by burner 16BMS switch board
Save.Remaining low-temperature flue gas (about 30-40 DEG C) is discharged by chimney 3 steam vent.
This utility model takes the temperature of point, temperature, flow, and hot blast to smoke backflow, flow has been carried out accurately
Calculating, reality also demonstrates the raising scope of pathogenic wind-warm, the unsaturated humidity of mixing wind after mixing, it is entirely avoided condense in air channel
The generation of water and the generation of 1 fog of burner, do not affect normal burning.Supporting independent recirculation blower 12 is for by low
Temperature flue gas is incorporated in the hot air duct 7 of elevated pressures, compares and directly draws low-temperature flue gas, a side in side, inlet scoop with aerator 9
Face avoids the water vapour corrosion to aerator 9 impeller in flue gas, on the other hand it also avoid the ripple of the factor such as exhaust gas volumn, pressure
The dynamic impact on aerator 9 motor power (output) parameter.This utility model actual motion test result is as shown in table 1.
This utility model reduce flue gas nitrogen oxide principle: reduce Fuel Consumption by degree of depth power-saving technology, make into
The fuel of the stove chamber inner combustion entering boiler body 2 is greatly reduced, and in burner hearth, unit volume burning load value is down to 377KW/m3Far
Less than the ＜ 500KW/m needed for ultralow NOx combustion3Requirement, flame is distributed more equal in boiler body 2 burner hearth that volume is bigger
Even, flue-gas temperature is the most relatively low, it was demonstrated that bigger boiler body 2 chamber design structure is preferably for reducing NOx combustion creation
Essential condition；The outer recirculation structure of combustion gas furnace simultaneously, allows the non-flammable low-temperature flue gas of part participate in burning in returning burner hearth, increases
Flue gas capacity, the most just reduces flame kernel unit flue-gas temperature, and boiler smoke NOx generates mainly heating power type
, i.e. in burner hearth, cigarette Wen Yuegao growing amount is the most, and therefore, flue gas recirculation is to reduce NOx to generate most important structure.Other structures
Mainly for eliminate brought because of boiler body 2 super large burner hearth, flue gas recirculation structure body of heater stability, corrosion resistance, prevent
Only the concrete measure of the aspects such as the generation of cigarette condensed water, blower fan stability is mixed in air channel, is also that indispensable structure is improved.
Table 1 this utility model actual motion test result is such as
Claims (5)
1. the flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation, it is characterised in that include burner,
Boiler body, chimney, energy-saving appliance, condenser and preheater,
Described burner and described chimney are separately mounted to described boiler body both sides,
On described chimney, it is sequentially installed with to described chimney top steam vent with described boiler body junction from described chimney
Described energy-saving appliance, condenser and preheater,
Being additionally provided with hot air duct, described hot air duct one end is connected with described burner,
First pipeline one end is arranged on described chimney and is positioned at above described preheater, the other end connects with described hot air duct
Connect, described first pipeline be provided with recirculation blower,
Second pipe one end is connected with described preheater, the other end is connected with described hot air duct, pacifies on described second pipe
Equipped with aerator,
Described preheater is provided with cold wind import.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation the most as claimed in claim 1, its feature
Being, described chimney is vertically arranged, and described hot air duct is arranged on below described boiler body.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation the most as claimed in claim 2, its feature
Being, described hot air duct is embedded in underground.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation the most as claimed in claim 1, its feature
Being, described burner has two, and vertical array is on described boiler body.
A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation the most as claimed in claim 1, its feature
Being, described preheater has two, vertical array on described chimney, described preheater above and described cold wind import
The described preheater connecting, being positioned at lower section is connected with described second pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620518422.2U CN205746935U (en) | 2016-05-31 | 2016-05-31 | A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620518422.2U CN205746935U (en) | 2016-05-31 | 2016-05-31 | A kind of flue gas recirculation structure reducing gas fired-boiler burner hearth NO_x formation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461736A (en) * | 2017-09-18 | 2017-12-12 | 北京富士特锅炉有限公司 | A kind of gas industry boiler smoke recycling denitration and air preheating system |
| CN107763612A (en) * | 2017-11-28 | 2018-03-06 | 湖南长宏南雁锅炉修理安装有限公司 | Reduce the method for nitrogen oxides and its low nitrogen type shell boiler in boiler smoke |
| CN107883374A (en) * | 2017-11-21 | 2018-04-06 | 湖南安普诺环保科技有限公司 | A kind of natural gas boiler low nitrogen burning system and technique |
| CN110307559A (en) * | 2019-07-04 | 2019-10-08 | 江苏江顺精密机电设备有限公司 | A kind of low-nitrogen discharged combustion system of heating furnace |
-
2016
- 2016-05-31 CN CN201620518422.2U patent/CN205746935U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461736A (en) * | 2017-09-18 | 2017-12-12 | 北京富士特锅炉有限公司 | A kind of gas industry boiler smoke recycling denitration and air preheating system |
| CN107883374A (en) * | 2017-11-21 | 2018-04-06 | 湖南安普诺环保科技有限公司 | A kind of natural gas boiler low nitrogen burning system and technique |
| CN107763612A (en) * | 2017-11-28 | 2018-03-06 | 湖南长宏南雁锅炉修理安装有限公司 | Reduce the method for nitrogen oxides and its low nitrogen type shell boiler in boiler smoke |
| CN110307559A (en) * | 2019-07-04 | 2019-10-08 | 江苏江顺精密机电设备有限公司 | A kind of low-nitrogen discharged combustion system of heating furnace |
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