CN201628221U

CN201628221U - Novel side wall gas burner

Info

Publication number: CN201628221U
Application number: CN2010201614883U
Authority: CN
Inventors: 毛羽; 王娟; 王江云
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-16
Filing date: 2010-04-16
Publication date: 2010-11-10
Anticipated expiration: 2020-04-16

Abstract

The utility model discloses a novel side wall gas burner, wherein the front end surface of a fuel ejecting nozzle (1) of the burner is provided with a plurality of fuel jet flow nozzle holes which are arranged on a concentric circle, thereby being capable of generating a plurality of forward fuel jet flows, increasing the contact area of high speed fuels and relatively stationary air on the surrounding, strengthening momentum exchange and component mixture between the high speed fuels and the air, simultaneously forming stronger negative pressure on a center area of the jet flows, inhaling air, strengthening the ejecting effect to the air, being beneficial for the burning process, being capable of guaranteeing to supply enough air under the condition that the negative pressure of a hearth is extremely low, leading the burning process to be rapid and full, producing adherent flame, leading a heating furnace to keep in a high thermal efficiency, and observably reducing the emission of NOx. An outlet fluid director (4) of the burner comprises a rotary cone and a rotary arc surface, wherein the rotary cone and the rotary arc surface are tangent on a cohesion position, the shape is simple, the process is convenient, the flow resistance is low, and the burner also can be used in low negative pressure fields of the hearth. The novel side wall gas burner is suitable for various heating furnaces, particularly is a pipe type heating furnace with a higher furnace body and a longer furnace pipe, and particularly is a cracking furnace.

Description

A kind of novel sidewall gas burner

Affiliated technical field

Be extensive use of tubular heater in petrochemical process, some heating furnace is adopting the base burning device simultaneously because body of heater is higher, boiler tube is longer, and also will adopt radiant wall burner is the top heat supply of heating furnace.The present invention relates to a kind of novel gas radiant wall burner, this burner utilizes the ejector action of fuel gas to suck air, has stronger self-priming oxygen supply function, under the very low condition of combustion chamber draft, can produce required adherent flame profile, sufficient combustion according to arts demand, has the higher thermal efficiency, can be used for that various heating furnaces, particularly body of heater are higher, in the boiler tube longer pipe formula heating furnace, pyrolysis furnace especially.

Background technology

Because the structure difference of various technology tubular heaters is all different as boiler tube arrangement mode, heat transfer type, burner position or the like, so to the different requirement that is distributed with of the shape of flame in the burner hearth and temperature.The heating furnace higher for body of heater, that boiler tube is long only adopts the base burning device can not guarantee the heat supply of top boiler tube, needs to adopt radiant wall burner, so that the top boiler tube is heated.Because radiant wall burner is positioned at the burner hearth middle and upper part, so it is lower to locate combustion chamber draft, it is insufficient to cause the radiant wall burner air to supply with easily, the result of incomplete combustion.The fuel injection burner anteriomedial of present existing radiant wall burner only has a fuel jet orifice, has several spray orifices at the shower nozzle periphery sometimes; The ejector capacity of spray orifice is low in the middle of one, can not supply with enough air, and its peripheral spray orifice burner oil, can cause air flow resistance excessive, further reduce the supply of air, often cause the phenomenon that meeting produces incomplete combustion, furnace outlet CO and other pollutant exceeds standard, the heating furnace load descends, economic benefit descends.Particularly for some natural air inducing heating furnaces, combustion chamber draft is low, the above-mentioned phenomenon of easier appearance.

Summary of the invention

Produce incomplete combustion in order to overcome existing sidewall gas burner, furnace outlet CO and other pollutant exceed standard, the heating furnace load descends, the phenomenon that economic benefit descends, the present invention proposes a kind of novel sidewall gas burner, its technical scheme that solves that this technical problem adopts is: by efficiently utilizing the pressure energy of gaseous fuel, injection sucks air, can increase considerably supply capacity to air, simultaneously fuel and air can rapid mixing in the injection mixing tube, fully burning, and by the flame emission device, produce needed flame profile, therefore can control the temperature field in the heating furnace, generation is easy to distribute to the temperature field of furnace tube heat transfer, significantly improves burning and radiant heat transfer efficient.Because sufficient combustion can reduce the content that exports CO, improves heater efficiency, reduces fuel consumption and CO significantly ₂Discharging, and can significantly improve the treating capacity of heating furnace.This novel burner is simple in structure, and operating flexibility is big, is easy to make and install, can under 20～130% situations of declared working condition, stablize normal combustion, and can adapt to all gases fuel, can satisfy the needs of various technical process heating furnaces, particularly tubular heater.

The present invention includes a kind of novel sidewall gas burner, it is by fuel injection shower nozzle (1), a wind mixer-ejector (2), pre-burning section (3), exducer (4), secondary air channel (5), secondary wind outlet section (6), secondary wind air channel (7), furnace wall (8), burner hearth (9), interior heat preservation and soundproof layer (10), outer heat preservation and soundproof layer (11) is formed, it is characterized in that fuel injection shower nozzle (1) is positioned at the arrival end of a wind mixer-ejector (2), the port of export of the arrival end of pre-burning section (3) and a wind mixer-ejector (2) links, exducer (4) is positioned at the port of export of pre-burning section (3), secondary air channel (5) and secondary wind outlet section (6) link, and being positioned at the outside of a wind mixer-ejector (2) and pre-burning section (3), the annular space between them has constituted secondary air duct (7).

Described novel sidewall gas burner, it is characterized in that: the external diameter of fuel injection shower nozzle (1) is d, has the some fuel jet spray orifices that are positioned on the concentric circles in its front, and the pitch diameter at fuel jet spray orifice place is d1, injection diameter d2, going deep into length is H1; Then the scope of pitch diameter d1 is at 5mm～150mm, and the scope of injection diameter d2 is at 0.5mm～15mm, and the scope of going deep into length H1 is at 0～200mm, and the spray orifice number is 1～32, and the cone angle a scope that the spray orifice axis forms is at 0 °～85 °.

Described novel sidewall gas burner, it is characterized in that: exducer (4) is contained in the port of export of pre-burning section (3), is made up of a rotating cone and one rotation cambered surface, rotating cone and rotation cambered surface are tangent at joining place, around have some rectangles and export; The scope of the cone angle B of rotating cone is 10 °～160 °, and the scope of the included angle A of rotation cambered surface segmental arc correspondence is 5 °～80 °.

Description of drawings

Fig. 1 is the radiant wall burner front view.

Fig. 2 is the structural representation of a fuel injection shower nozzle and a wind mixer-ejector.

Fig. 3 is the structural representation of pre-burning section and exducer.

1. fuel injection shower nozzles among the figure, 2. wind mixer-ejector, 3. pre-burning section, 4. exducer, 5. secondary air channel, 6. secondary wind outlet section, 7. secondary wind air channel, 8. furnace wall, 9. burner hearth, 10. in the heat preservation and soundproof layer, 11. outer heat preservation and soundproof layers.

The specific embodiment

Describe below in conjunction with the course of work of accompanying drawing novel sidewall gas burner of the present invention.

With reference to figure 1, novel sidewall gas burner is by fuel injection shower nozzle (1), a wind mixer-ejector (2), pre-burning section (3), exducer (4), secondary air channel (5), secondary wind outlet section (6), secondary wind air channel (7), furnace wall (8), burner hearth (9), interior heat preservation and soundproof layer (10), outer heat preservation and soundproof layer (11) is formed, it is characterized in that fuel injection shower nozzle (1) is positioned at the arrival end of a wind mixer-ejector (2), the port of export of the arrival end of pre-burning section (3) and a wind mixer-ejector (2) links, exducer (4) is positioned at the port of export of pre-burning section (3), secondary air channel (5) and secondary wind outlet section (6) link, and being positioned at the outside of a wind mixer-ejector (2) and pre-burning section (3), the annular space between them has constituted secondary air duct (7).Gaseous fuel sprays into a wind mixer-ejector (2) by fuel injection shower nozzle (1), one time wind enters a wind mixer-ejector (2) under the ejector action of combustion chamber draft and fuel jet, flowing into pre-burning section 3 forward with fuel mix takes fire, owing to only supplied with the part air that burns required this moment, what carry out is combustion with meagre oxygen, the NOx that produces is lower, and combustion product passes through the diffusion into the surface of the effect of exducer (4) to furnace wall (8), and meets with the secondary wind facies; Under the combustion chamber draft effect, secondary wind enters burner hearth (9), the outlet in secondary air channel (7) by secondary air channel (7) simultaneously, meet with the primary combustion product of pre-burning section 3 outlets, carry out secondary completing combustion, form heat flux distribution, the top boiler tube is heated near furnace wall (8).Because fuel concentration during second-time burning and oxygen concentration are by flue gas dilution, the NOx of generation is also lower.

With reference to figure 2, the external diameter of fuel injection shower nozzle (1) is d, has the some fuel jet spray orifices that are positioned on the concentric circles in its front, and the pitch diameter at fuel jet spray orifice place is d1, injection diameter d2, and going deep into length is H1; Then the scope of pitch diameter d1 is at 5mm～150mm, and the scope of injection diameter d2 is at 0.5mm～15mm, and the scope of going deep into length H1 is at 0～200mm, and the spray orifice number is 1～32, and the cone angle a scope that the spray orifice axis forms is at 0 °～85 °.Form an injector by a fuel injection shower nozzle (1) and a wind mixer-ejector (2), under the ejector action of fuel jet, air can be sucked, with the middle fuel jet orifice of the injector of present existing radiant wall burner, periphery has several spray orifice differences, have a plurality of fuel jet spray orifices that are positioned on the concentric circles on the front end face of fuel nozzle of the present invention, can produce multiply fuel jet forward, this multiple jets can strengthen the injection effect to air from two aspects, at first the multiply fuel jet has increased the high velocity fuel and the contact area of relative static air on every side, momentum-exchange and the component strengthened between them are mixed, enhancing is to the injection effect of air, and fuel and Air mixing are favourable to combustion process before can overheavy firing; In addition,, can form stronger negative pressure, suck air, strengthen injection effect air in the central area of multiple jets by Bernoulli effect.

With reference to figure 3, exducer (4) is contained in the port of export of pre-burning section (3), is made up of a rotating cone and one rotation cambered surface, and rotating cone and rotation cambered surface are tangent at joining place, around have some rectangles and export; The scope of the cone angle B of rotating cone is 10 °～160 °, and the scope of the included angle A of rotation cambered surface segmental arc correspondence is 5 °～80 °.The air deflector of present existing radiant wall burner is made of multistage complex curve rotary body, and difficulty of processing is big, cost is high and be difficult to guarantee machining accuracy.The exducer (4) that the present invention proposes, simple shape, easy to process, flow resistance is low simultaneously, also can use in the occasion that combustion chamber draft is low.

Numerical simulation and experiment show, under the condition of equal fuel amount, the radiant wall burner that adopts the present invention to propose can increase by 20%～65% air supply, therefore can eliminate unburnt phenomenon, and increases furnace operation and temperature controlled flexibility.Simultaneously can produce adherent flame and heat flux distribution, satisfy the requirement of heating furnace technology.Owing to sufficient combustion, can improve the heat transfer efficiency of efficiency of combustion and heating furnace radiation chamber, reduce unit consumption of fuel and also reduce CO ₂Discharging, increase the benefit of device.

The burner that the present invention proposes is applicable to various burning heaters, is particularly suitable for that body of heater is higher, in the boiler tube longer pipe formula heating furnace, especially pyrolysis furnace.

Claims

1. novel sidewall gas burner, it is by fuel injection shower nozzle (1), a wind mixer-ejector (2), pre-burning section (3), exducer (4), secondary air channel (5), secondary wind outlet section (6), secondary wind air channel (7), furnace wall (8), burner hearth (9), interior heat preservation and soundproof layer (10), outer heat preservation and soundproof layer (11) is formed, it is characterized in that fuel injection shower nozzle (1) is positioned at the arrival end of a wind mixer-ejector (2), the port of export of the arrival end of pre-burning section (3) and a wind mixer-ejector (2) links, exducer (4) is positioned at the port of export of pre-burning section (3), secondary air channel (5) and secondary wind outlet section (6) link, and being positioned at the outside of a wind mixer-ejector (2) and pre-burning section (3), the annular space between them has constituted secondary air duct (7).

2. by the described novel sidewall gas burner of claim 1, it is characterized in that: the external diameter of fuel injection shower nozzle (1) is d, has the some fuel jet spray orifices that are positioned on the concentric circles in its front, and the pitch diameter at fuel jet spray orifice place is d1, injection diameter d2, going deep into length is H1; Then the scope of pitch diameter d1 is at 5mm～150mm, and the scope of injection diameter d2 is at 0.5mm～15mm, and the scope of going deep into length H1 is at 0～200mm, and the spray orifice number is 1～32, and the cone angle scope that the spray orifice axis forms is at 0 °～85 °.

3. by the described novel sidewall gas burner of claim 1, it is characterized in that: exducer (4) is contained in the port of export of pre-burning section (3), is made up of a rotating cone and one rotation cambered surface, rotating cone and rotation cambered surface are tangent at joining place, around have some rectangles and export; The scope of the cone angle B of rotating cone is 10 °～160 °, and the scope of the included angle A of rotation cambered surface segmental arc correspondence is 5 °～80 °.