CN204254612U - A kind of fully pre-mixing gas combustion burner of low nox emission - Google Patents
A kind of fully pre-mixing gas combustion burner of low nox emission Download PDFInfo
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- CN204254612U CN204254612U CN201420633877.XU CN201420633877U CN204254612U CN 204254612 U CN204254612 U CN 204254612U CN 201420633877 U CN201420633877 U CN 201420633877U CN 204254612 U CN204254612 U CN 204254612U
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Abstract
The utility model relates to a kind of fully pre-mixing gas combustion burner of low nox emission, solve flue gas NOx discharge lower than 40ppm urban environmental protection requirement technical problem, belong to Industrial Boiler Technology field.It is characterized in that: air, boiler smoke inlet tube enter hybrid chamber at burner front end outer wall relative tangential, then complete Homogeneous phase mixing through one, two rotor plates successively; Mixed airflow is when rotor combustion head, and natural gas sprays mixed combustion relatively from rotor plate aperture, and combustion gas tangent line flows to chamber wall spiral and advances, and forms mixed combustion again; Flue gas and air mix by a certain percentage and reduce oxygen content, guarantee to burn at a lower temperature, reduce nitrogen oxide formation condition, guarantee NOx emission lower than 40ppm, CO lower than 200ppm; The flue gas of about 180 DEG C replaces the air capacity of control combustion temperature and surplus, reduces gas consumption; According to mensuration oxygen content of smoke gas and fire box temperature, can effectively control to add flue gas ratio.The burner of different thermal power can be designed as required.
Description
Technical field
The present invention relates to a kind of fully pre-mixing gas combustion burner of low nox emission, refer more particularly to the full premix distribution mode gas combustion apparatus that nitrogen oxides emission amount is less than 40ppm low emission, belong to Industrial Boiler Technology field.
Background technology
Along with carrying out of new Law on Environmental Protection is voted through in the 8th meeting of 12 Standing Committee of the National People's Congress, the requirement of city to environment all mentions agenda, is reduced to below 40ppm to the NOx content requirement in boiler emission flue gas.Low-temperature burning is the effective way reducing nitrogen oxide.Due to the CH of natural gas
4content is high, and calorific value is high, and controlling low-temperature burning needs to add excess air, adds the concentration that excess air one is the increase in oxygen in combustion process, is conducive to again the generation of nitrogen oxide; Two is that normal temperature air enters boiler furnace, and about 180 DEG C discharges, take mass efficient heat energy out of and cause energy loss.Calculate by Sichuan-chongqing Region natural gas heat energy, under adiabatic condition, air mixes with natural gas when reaching complete oxidation ratio and burns, 2100 DEG C can be reached, ignition temperature to be reduced to 1100 DEG C, almost will add air capacity in proportion, this part air is raised to about 180 DEG C by normal temperature and discharges the thermal loss taken away and account for about 5%.Adopt flue gas to substitute excess air and reduce ignition temperature, one is make use of fume afterheat, can reduce the heat of excessive atmosphere temperature rising emission loss about 5%.Two are reduction of the oxygen content in combustion process, are unfavorable for the generation of nitrogen oxide.Fully mixing of flue gas and air is the key of burner, and this invention focuses on solving this kind of problem.
Summary of the invention
The object of the invention is: the fully pre-mixing gas combustion burner that a kind of low nox emission is provided, make the fuel gas buring of Industrial Boiler be pre-mixed in uniform situation, meet fire and at once burn, have that combustion flame is short, temperature is low, burning is clean, without the feature of surge.Flue gas and air Homogeneous phase mixing reduce oxygen concentration, form the formation condition that low-temperature burning reduces nitrogen oxide, ensure that the instructions for use of low NOx drainage.
The technical scheme taked for achieving the above object is: a kind of fully pre-mixing gas combustion burner of low nox emission, comprises flue gas air just mixed chamber, one-level rotor mixed plate, the secondary rotor mixing version of flue gas inlet tube, air intlet pipe, relative tangential air inlet; Fuel gas inlet pipe, combustion gas chamber, band combustion gas are to the rotor combustion head of spray orifice; Fiery sleeve pipe seen by fire rod, igniting.It is characterized in that: described flue gas air intlet pipe relative tangential is communicated with flue gas air just mixed chamber, two kinds of gas rotatings enter just mixed chamber; Described one-level rotor mixing version tangentially inward turning, is arranged on the just mixed chamber port of export, forms one-level hybrid chamber with secondary rotor mixed plate 150-500mm of being separated by; Described secondary rotor mixed plate tangentially inward turning, forms secondary hybrid chamber with rotor combustion head at a distance of 150-500mm; Described rotor mixing version, is made up of 24-32 block rotary blade, becomes 25-45 ° of elevation angle tangent line uniform; Described band combustion gas, to the rotor combustion head of spray orifice, is made up of 24-32 block chuck plate, becomes 25-45 ° of elevation angle tangent line uniform, and each face of every block is drilled with 1-2 and arranges φ 3-5mm gas outlet hole, and formed after assembling spray formula, chuck rotor plate is connected with combustion gas chamber; Described igniting is seen fiery sleeve pipe and is arranged on burner centre, can realize artificial or automatic ignition.The fiery sleeve pipe of described sight shares with igniting sleeve pipe, can install from in-motion viewing fire device.
Described flue gas inlet tube, air intlet pipe relative tangential are welded on flue gas air and just mix on chamber, and gas is that tangent line enters rotational flow mixing;
Described one-level rotor mixed plate, is arranged on the just mixed chamber port of export, forms one-level hybrid chamber with secondary rotor mixed plate 150-500mm of being separated by;
Described secondary rotor mixed plate, is arranged on the one-level hybrid chamber port of export, forms secondary hybrid chamber with rotor burner plate 150-500mm of being separated by;
Described one-level, secondary rotor mixed plate, be made up of 24-32 block rotary blade, becomes 25-45 ° of elevation angle tangent line uniform, be welded on center fire sleeve outer wall and burner inwall.
Described band combustion gas is to the rotor combustion head of spray orifice, be made up of 24-32 block chuck plate, become 25-45 ° of elevation angle tangent line uniform, the each face of every block is drilled with 1-2 and arranges φ 3-5mm venthole, formed spray formula after assembling, chuck rotor plate and burner outer wall combustion gas chamber are weldingly connected logical, form close contact (not welding) with center fire sleeve outer wall, meet requirement of expanding with heat and contract with cold.The gas of 150-500mm is had to flow blending space between rotor combustion head and secondary rotor mixed plate.Chuck rotor plate side is seen from outside to inside in 10-12 ° of angle;
Described combustion gas chamber and hybrid chamber are coaxially arranged on skin, weld communicate with chuck rotor plate; Fuel gas inlet pipe and air intlet pipe distribute at an angle of 90.
Described igniting sleeve pipe is arranged on burner centre, can install automatic ignition device or manual firing.
Described flame-observing hole pipe shares with igniting sleeve pipe, can install automatic flame detection device.
The invention has the beneficial effects as follows: 1. because the flue gas of 180 DEG C and the Homogeneous phase mixing of air reduce oxygen content, avoid the formation of combustion high temperature, reduce the formation condition of nitrogen oxide, ensure that the emission request of NOx lower than 40ppm.2. because natural gas methane content is high, calorific value is high, in boiler combustion, need the excess air of nearly a times ignition temperature could be controlled below 1100 DEG C, normal temperature air enters the discharge of 180 DEG C, stove, cause the thermal loss of about 5%, for this reason, the flue gas of 180 DEG C substitutes excess air and reduces ignition temperature, has just saved the energy of about 5%.3. the premixing effect of this device is good, meets fire and at once burns, have that combustion flame is short, temperature is low, burning is clean, without the feature of surge.
Accompanying drawing explanation
Below explanation and detailed description of the invention are illustrated further to the present invention with reference to the accompanying drawings.
Fig. 1 is structural representation of the present invention;
Fig. 2 left view;
Fig. 3 right view;
Fig. 4 is that the A-A of Fig. 1 is to structural representation;
Fig. 5 is chuck gas rotary wing plate;
The flow trace of Fig. 6 burning gases in burner hearth.
In figure, 1, fire rod; 2, fiery sleeve pipe is seen in igniting; 3, air intlet; 4, gas approach; 5, air, flue gas just mixed chamber; 6, one-level rotor mixed plate; 7, one-level hybrid chamber; 8, secondary rotor mixed plate; 9, secondary hybrid chamber; 10, burner mounting flange; 11, Imported gas; 12, combustion gas chamber; 13, chuck combustion gas rotor combustion head; 14, adpting flange; 15, chuck gas rotary wing plate, 16, gas outlet aperture.
Detailed description of the invention
Fig. 1, Fig. 2, Fig. 3 are the fully pre-mixing gas combustion burner of a kind of low nox emission of the present invention.Fig. 6 is that burning gases become rotational flow form schematic diagram in burner hearth.
Visible as shown in Figure 1, Figure 2, Figure 3 shows, the fully pre-mixing gas combustion burner structure of described a kind of low nox emission comprises: 1, fire rod; 2, fiery sleeve pipe is seen in igniting; 3, air intlet; 4, gas approach; 5, air flue gas just mixed chamber; 6, one-level rotor mixed plate; 7, one-level hybrid chamber; 8, secondary rotor mixed plate; 9, secondary hybrid chamber; 10, burner mounting flange; 11, Imported gas; 12, combustion gas chamber; 13, chuck combustion gas rotor burning; 14, adpting flange; 15, chuck combustion gas rotor, 16, gas outlet aperture.Be characterised in that: air intlet pipe 3, flue gas inlet tube 4, air flue gas just mixed chamber 5, formation air flue gas relative tangential enter dispersion just mixed structure; The mixing of one-level rotor version 6, one-level hybrid chamber 7, secondary rotor mixed plate 8, secondary hybrid chamber 9, form air flue gas two kinds of gases by just mixing all mixed structure and process; Chuck rotor combustion head 13, chuck gas rotary wing plate 15, Imported gas 11, natural air cavity 16 form combustion gas distribution, to the structure of mixed combustion and process.
Fig. 2 left view is the structure chart of rotor combustion head 13, Fig. 5 is chuck gas rotary wing plate structure chart, shown in Fig. 2, Fig. 5, with the rotor combustion head of combustion gas to spray orifice, be made up of 24-32 block chuck plate, become 25-45 ° of elevation angle tangent line uniform, the each face of every block is drilled with 1-2 and arranges φ 3-5mm gas outlet hole, formed spray formula after assembling, chuck rotor plate and burner outer wall combustion gas chamber are weldingly connected logical, form close contact (not welding) with center fire sleeve outer wall, meet requirement of expanding with heat and contract with cold.Chuck rotor plate side is seen from outside to inside in 10-12 ° of angle.
Can see from Fig. 4 A-A to sectional view: described I and II rotor mixing version, is made up of 24-32 block sheet, becomes 25-45; Elevation angle tangent line is uniform, is welded on center fire sleeve outer wall and burner inwall.Composition graphs 1 can be seen: have the gas and vapor permeation space of 150-500mm to claim secondary hybrid chamber between secondary rotor mixed plate and rotor combustion head.
Visible as shown in Figure 1, Figure 2, Figure 3 shows, described combustion gas chamber and hybrid chamber are coaxially arranged on skin, weld communicate with chuck rotor plate; Fuel gas inlet pipe and air intlet pipe distribute at an angle of 90.
Shown in Fig. 3 right view, described igniting sleeve pipe is positioned at device center, has flange to link with fire rod.Described flame-observing hole utilizes the space of this sleeve pipe air duct to realize, and glass visor is housed, also can by the automatic flame detection of dress flame detection equipment.
As can be seen from the flow trace of Fig. 6 burning gases in burner hearth, because rotor combustion head is made up of 24-32 block rotor plate, become 25-45 ° of elevation angle tangent line uniform, burning gases tangent line flows to furnace chamber wall curl and advances, be conducive to gas switch in spiral is advanced and play better immixture again, make gas fuel burning more complete.
Boiler smoke mixes with air, reduce the oxygen content of combustion air, when combustion gas and combustion oxygen reach complete combusted proportion, ignition temperature can not produce high temperature, do not need supplementary secondary air combustion-supporting and cooling, avoid again mixed uniformly device problem, surge problems, simplify apparatus structure, fully meet the object that low-temperature burning reduces the generation probability of oxynitride.
Claims (9)
1. a fully pre-mixing gas combustion burner for low nox emission, comprises flue gas air just mixed chamber, one-level rotor mixed plate, the secondary rotor mixed plate of flue gas inlet tube, air intlet pipe, relative tangential air inlet; Fuel gas inlet pipe, combustion gas chamber, band combustion gas are to the rotor combustion head of spray orifice; Fiery sleeve pipe seen by fire rod, igniting; It is characterized in that: described flue gas, air intlet pipe relative tangential are communicated with flue gas air just mixed chamber, two kinds of gas tangent lines enter just mixed chamber; Described one-level rotor mixing version tangentially inward turning, is arranged on just mixed top, chamber, forms one-level hybrid chamber with secondary rotor mixed plate 150-500mm of being separated by; Described secondary rotor mixing version tangentially inward turning, forms secondary hybrid chamber with rotor combustion head at a distance of 150-500mm; Described rotor mixing version, is made up of 24-32 block rotary blade, becomes 25-45 ° of elevation angle tangent line uniform; Described band combustion gas, to the rotor combustion head of spray orifice, is made up of 24-32 block chuck plate, and become 25-45 ° of degree elevation angle tangent line uniform, each face of every block is drilled with 1-2 and arranges φ 3-5mm gas outlet hole, and formed after assembling spraying formula, chuck rotor plate is connected with combustion gas chamber; Described combustion gas chamber and hybrid chamber are coaxially arranged on skin, have fuel gas inlet pipe to be communicated with; Described igniting is seen fiery sleeve pipe and is arranged on burner centre, can realize artificial or automatic ignition, and described sight fire sleeve pipe shares with igniting sleeve pipe, can install from in-motion viewing fire device.
2. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described flue gas inlet tube, air intlet pipe relative tangential are welded on flue gas air just on mixed chamber, and gas be that tangent line enters rotational flow and mixes.
3. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described one-level rotor mixed plate, is arranged on the just mixed chamber port of export, forms one-level hybrid chamber with secondary rotor mixed plate 150-500mm of being separated by.
4. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described secondary rotor mixed plate, is arranged on the one-level hybrid chamber port of export, forms secondary hybrid chamber with rotor burner plate 150-500mm of being separated by.
5. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, it is characterized in that: described one-level, secondary rotor mixed plate, be made up of 24-32 block rotary blade, become 25-45 ° of elevation angle tangent line uniform, be welded on center fire sleeve outer wall and burner inwall.
6. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, it is characterized in that: described band combustion gas is to the rotor combustion head of spray orifice, be made up of 24-32 block chuck plate, become 25-45 ° of elevation angle tangent line uniform, the each face of every block is drilled with 1-2 and arranges φ 3-5mm venthole, and formed after assembling spray formula, chuck rotor plate and burner outer wall combustion gas chamber are weldingly connected logical, adopt with center fire sleeve outer wall and do not weld close contact, meet requirement of expanding with heat and contract with cold; The gas of 150-500mm is had to flow blending space between rotor combustion head and secondary rotor mixed plate; Chuck rotor plate side is seen from outside to inside in 10-12 ° of angle.
7. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described combustion gas chamber and hybrid chamber are coaxially arranged on skin, welds communicate with chuck rotor plate; Fuel gas inlet pipe and air intlet pipe distribute at an angle of 90.
8. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described igniting sleeve pipe is arranged on burner centre, can install automatic ignition device or manual firing.
9. the fully pre-mixing gas combustion burner of a kind of low nox emission according to claim 1, is characterized in that: described flame-observing hole pipe shares with igniting sleeve pipe, can install automatic flame detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633877.XU CN204254612U (en) | 2014-10-21 | 2014-10-21 | A kind of fully pre-mixing gas combustion burner of low nox emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420633877.XU CN204254612U (en) | 2014-10-21 | 2014-10-21 | A kind of fully pre-mixing gas combustion burner of low nox emission |
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| Publication Number | Publication Date |
|---|---|
| CN204254612U true CN204254612U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420633877.XU Expired - Fee Related CN204254612U (en) | 2014-10-21 | 2014-10-21 | A kind of fully pre-mixing gas combustion burner of low nox emission |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196056A (en) * | 2016-08-19 | 2016-12-07 | 陈维汉 | The burner of the temperature control low indole energy of smoke backflow and Staged Premixed Combustion |
| CN107218603A (en) * | 2017-06-27 | 2017-09-29 | 珠海优特物联科技有限公司 | Mixing arrangement and the gas-fired equipment with it |
| CN107448938A (en) * | 2016-06-01 | 2017-12-08 | 上海钜荷热力技术有限公司 | A kind of interior circulating flue gas reverse-flow type all-premixing burner |
-
2014
- 2014-10-21 CN CN201420633877.XU patent/CN204254612U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448938A (en) * | 2016-06-01 | 2017-12-08 | 上海钜荷热力技术有限公司 | A kind of interior circulating flue gas reverse-flow type all-premixing burner |
| CN106196056A (en) * | 2016-08-19 | 2016-12-07 | 陈维汉 | The burner of the temperature control low indole energy of smoke backflow and Staged Premixed Combustion |
| CN107218603A (en) * | 2017-06-27 | 2017-09-29 | 珠海优特物联科技有限公司 | Mixing arrangement and the gas-fired equipment with it |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20151021 |
|
| EXPY | Termination of patent right or utility model |