CN205535805U - Vertical combustor for natural circulation condensing boiler - Google Patents

Abstract

The utility model discloses a vertical combustor for natural circulation condensing boiler, include muddy fan housing, premixer and the bellows of following supreme coaxial setting in proper order down, connect the combustion -supporting wind air -supply line of horizontally on the external circumferential wall of bellows, peg graft and have vertical stretching into in the center of bellows top surface mix the main gas import pipe of fan housing, main gas import pipe with be equipped with vertical stretching into between the combustion -supporting wind air -supply line that mixes the fan housing mixes swirler in advance, mix in advance swirler with be equipped with vertical stretching into between the combustion -supporting wind air -supply line mix the burning torch of fan housing, combustion -supporting wind air -supply line intercommunication fan, fan intercommunication air preheater. Its technological effect is: its backpressure that can reduce boiler furnace prevents to breathe heavily the emergence of shake, strong adaptability can improve the thermal efficiency of boiler, can effectively fall low nitrogen oxide and discharge to the incomplete combustion of gas has been avoided.

Description

A kind of vertical Natural Circulation condensing boiler burner

Technical field

This utility model relates to a kind of vertical Natural Circulation condensing boiler burner.

Background technology

The current burner on vertical gas boiler, it is impossible to be equipped with high pressure positive blower, it is impossible to effectively overcome Burner hearth high back pressure, thus cause boiler heat supplying not enough and burner hearth surge, even cannot normally put down time serious Steady fortune. meanwhile, the current burner on vertical gas boiler cannot effectively control the length of flame, it is impossible to Meeting the combustion requirements of the boiler of little volume. the current burner on vertical gas boiler automatically controls Level is poor.Finally, the combustion system that the current burner on vertical gas boiler premixes entirely, nothing Method meets the discharge of existing nitrogen oxides.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of vertical naturally follow Ring condensing boiler burner, it can reduce the back pressure of boiler furnace, prevent the generation of surge；Suitable Ying Xingqiang, can improve the thermal efficiency of boiler, can effectively reduce discharged nitrous oxides, and avoid combustion gas Imperfect combustion.

A kind of technical scheme realizing above-mentioned purpose is: a kind of vertical Natural Circulation condensing boiler burns Device, including the mixed fan housing, premixer and the bellows that the most sequentially coaxially arrange, outside described bellows The combustion air blast pipe of level is connected in circumferential wall；

The center of described bellows end face is plugged with a main fuel gas inlet vertically stretching into described mixed fan housing Pipe, is provided with one and vertically stretches into described mixed between described main fuel gas inlet pipe and described combustion air blast pipe The premixed swirl device of fan housing, is provided with between described premixed swirl device and described combustion air blast pipe and vertically stretches Enter the burning torch of described mixed fan housing；

Described combustion air blast pipe connection blower fan, described blower fan connection air preheater.

Further, described bellows and described combustion air blast pipe junction are provided with deflection plate.

Further, the top of described combustion air blast pipe is provided with air door regulation servomotor.

Further, this burner is provided with connection described air door regulation servomotor and described main combustion The PID controller of gas inlet tube.

Further, the bottom of described burning torch is higher than the bottom of described premixed swirl device.

Further, the end face of described bellows is plugged with ion bar, reflective flame-observing hole and lighter, Described lighter connects described burning torch.

Further, the inwall of described premixer and described mixed fan housing scribbles fire resistant coating.

Have employed the technical side of a kind of vertical Natural Circulation condensing boiler burner of the present utility model Case, including the mixed fan housing, premixer and the bellows that the most sequentially coaxially arrange, outside described bellows The combustion air blast pipe of level is connected in circumferential wall；The center of described bellows end face is plugged with one vertically Stretch into the main fuel gas inlet pipe of described mixed fan housing, described main fuel gas inlet pipe and described combustion air blast pipe Between be provided with a premixed swirl device vertically stretching into described mixed fan housing, described premixed swirl device is with described The burning torch vertically stretching into described mixed fan housing it is provided with between combustion air blast pipe；Described combustion air blast pipe Connection blower fan, described blower fan connection air preheater.It has the technical effect that can be effective by blower fan Overcome burner hearth back pressure, prevent that burner hearth back pressure is too high causes heat supply not enough and burner hearth surge, it is ensured that boiler is put down Steady operation；Short and compact flame.Improve the adaptability of burner, enter the combustion air of burner Have passed through preheating, improve the thermal efficiency of boiler, combustion gas and combustion air 90% premixed combustion, can have Effect reduces discharged nitrous oxides, and premixed swirl device effectively raises the burner hearth thermal efficiency, extends burning Stroke, it is to avoid the imperfect combustion of combustion gas, improves the adaptability of burner equally.

Accompanying drawing explanation

Fig. 1 is the front view of vertical Natural Circulation condensing boiler.

Fig. 2 is the left view of vertical Natural Circulation condensing boiler.

Fig. 3 is the top view of vertical Natural Circulation condensing boiler.

Fig. 4 is the front view of the boiler body of vertical Natural Circulation condensing boiler.

Fig. 5 is the vertical view of the boiler body of a kind of vertical Natural Circulation condensing boiler of the present utility model Figure.

Fig. 6 is the water separator top view of the boiler body of vertical Natural Circulation condensing boiler.

Fig. 7 is the front view of a kind of vertical Natural Circulation condensing boiler burner of the present utility model.

Fig. 8 is the front view of a kind of vertical Natural Circulation condensing boiler burner of the present utility model.

Fig. 9 is the front view of a kind of vertical Natural Circulation condensing boiler energy-saving appliance of the present utility model.

Figure 10 is the internal junction of the energy-saving appliance of a kind of vertical Natural Circulation condensing boiler of the present utility model Composition.

Figure 11 is the right figure of the energy-saving appliance of a kind of vertical Natural Circulation condensing boiler of the present utility model.

Figure 12 is that the work of the energy-saving appliance of a kind of vertical Natural Circulation condensing boiler of the present utility model is former Reason figure.

Detailed description of the invention

Referring to Fig. 1, inventor of the present utility model is in order to enable preferably to technology of the present utility model Scheme understands, below by specifically embodiment, and combines accompanying drawing and is described in detail:

Referring to Fig. 1, one of the present utility model vertical Natural Circulation condensing boiler, including boiler basis Body 1, boiler body 1 is divided into the burner hearth 11 and flue gas chamber 12 being coaxially disposed.The cylindrical in flue gas chamber 12 Perisporium is provided with exhanst gas outlet 13.Flue gas chamber 12 be respectively arranged at two ends with annular header 16 He up and down Lower annular header 17.By concentrating rising tube bank between upper annular header 16 and lower annular header 17 14 connect with common downcomer bundle 15.Wherein, common downcomer bundle 15 is along flue gas chamber by a circle The common downcomer composition of the circumference of 12, concentrating rising tube bank 14 is by along flue gas chamber 12 Circumference coaxially arranged two circle concentrate tedges composition.Common downcomer bundle 15 is positioned in concentration Rise the radial outside of tube bank 14, wherein concentrate outer ring and the common downcomer bundle 15 rising tube bank 14 All leave just to exhanst gas outlet 13, discharge from exhanst gas outlet 13 for flue gas, the flue gas row being vertically arranged Go out gap.Leave smoke inlet 121 on the inner peripheral wall in flue gas chamber 12, concentrate and rise tube bank 14 Inner ring is provided with just to smoke inlet 121, makes flue gas enter flue gas chamber 12, the flue gas being vertically arranged Enter gap.Between exhanst gas outlet 13 and smoke inlet 121, the angle of deflection is less than more than 90 degree Equal to 180 degree.

So purpose of design is: define ω transversal flow Natural Circulation in flue gas chamber 12, Upper annular header 16 and lower annular header 17 correspondence are positioned at common downcomer bundle 15 and concentrate tedge The two ends up and down of bundle 14, so that common downcomer bundle 15 and concentrating rises up and down the two of tube bank 14 End draws in, and forms annular arrangement.This design expands burner hearth 11, and burner hearth is greatly improved The swept area of the heat transfer of 11, the flow velocity of flue gas in quickening boiler body 1, and improve convection heat transfer' heat-transfer by convection Speed.Fume balanced ground is separated in concentrating rising tube bank 14, then flows to the flue gas at rear portion Outlet 13, and steam water interface is after the water separator 18 in upper annular header 16 separates, water Being flow to lower annular header 17 by common downcomer bundle 15, form Natural Circulation, water vapour is from upper annular The steam (vapor) outlet 161 at header 16 top is discharged, it is achieved the steam-water separation in boiler body 1.

Flue gas is concentrated by two circles concentrating rising tube bank 14 in flue gas chamber 12 and is passed through between tedges, Two circles rising tube bank 14 are concentrated to concentrate tedge because by flue gas transversal flow heat exchange, internal water is met Hot volumetric expansion, density diminishes and rises to annular header 16, and the water of lower annular header 17 passes through Rising tube bank 14 is concentrated to flow to annular header 16.Common downcomer bundle 15 is owing to being not directly contacted with cigarette Gas, water flows to lower annular header 17 via upper annular header 16, forms Natural Circulation.

Wherein, it is disposed with the most a set of water separator 18 in upper annular header 16, often overlaps soda pop Segregation apparatus 18 includes steam-water separation sheet group 181, often set steam-water separation sheet group 181 include some along The steam-water separation sheet that the diametric(al) of upper annular header 16 is arranged in parallel.Any two pieces of adjacent soda pops Steam-water separation passage is formed between separating sheet.Steam-water separation sheet group 181 be respectively arranged at two ends with one solid Fixed pole 182, makes steam-water separation sheet group 181 fixing in upper annular header 16.The two of fixing bar 182 End is respectively fixing end and free end, the fixing end of fixing bar 182 and the cylindrical of upper annular header 16 Perisporium is fixed.Every piece of steam-water separation sheet in steam-water separation sheet group 181 is all in tilted layout simultaneously, In the present embodiment, every piece of steam-water separation sheet in steam-water separation sheet group 181 is near upper annular header 16 The height of outer circle wall side is higher than its height near upper annular header 16 inner peripheral wall side.This The purpose of sample design is advantageously in the circulation in boiler body 1 of its aqueous mixtures.

The principle of water separator 18 is similar to the impeller in steam turbine, and water vapour is from steam-water separation After the steam-water separation passage of device 18 passes through, from the steam (vapor) outlet 161 at the top of upper annular header 16 Flowing out boiler body 1, the water separated is back to lower annular header 17 from common downcomer bundle 15 In.This water separator 18 makes vertical gas boiler need not to install the outer soda pop of independent stove to divide From device, and good separation, it is also possible to obtain the steam of high-quality.This water separator 18, Greatly reduce the floor space of boiler.Comparing the outer water separator of stove, separating effect is more preferable, obtains Preferably steam quality.

In sum, boiler body 1 is concentrated by multitube transversal flow and is risen tube bank 14, this condensation pot Stove, it is possible to while reaching the operational efficiency of existing horizontal gas-fired boiler, solve horizontal gas-fired boiler The problems such as floor space is big, water capacity is big, solve the most well vertical boiler operation stability, The technical problems such as the outer steam-water separation of operational efficiency, stove.

Additionally, be designed with heat-insulation layer 19 inside and outside the flue gas chamber 12 of boiler body 1.

The top of burner hearth 11 is provided with the burner 2 for flame in burner hearth 11.Burner 2 includes Mixed fan housing 21, premixer 22 and the bellows 23 the most sequentially coaxially arranged.Wherein premixer 22 Fire resistant coating is scribbled with on the inwall of mixed fan housing 21.

Wherein bellows 23 are fixed on the top of burner hearth 11, premixer 22 and mixed fan housing 21 and stretch into burner hearth 11.Connecting on the outer circle wall of bellows 23 and have horizontally disposed combustion air blast pipe 24, combustion air enters Airduct 24 is provided with the air door regulation servomotor 241 being vertically arranged.The center of bellows 23 end face is inserted Being connected to a vertical main fuel gas inlet pipe 25, main fuel gas inlet pipe 25 is a bend pipe, is divided into position Horizontal segment outside bellows 23 and stretch into the vertical section of premixer 22 and mixed fan housing 21 straight down. Be provided with between vertical section and the combustion air blast pipe 24 of main fuel gas inlet pipe 25 one be vertically arranged pre- Mixed cyclone 26.The top of premixed swirl device 26 is fixed with bellows 23, and bottom is stretched into mixed straight down Fan housing 21, i.e. premixed swirl device 26 are off setting in bellows 23.Premixed swirl device 26 with The burning torch stretching into burner 2 from bellows 23 end face straight down it is provided with between combustion air blast pipe 24 27, mixed fan housing 21 is stretched in the bottom of burning torch 27, and higher than the bottom of premixed swirl device 26.Igniting The bottom of rifle 27 is provided with flame holder 271.It is additionally provided with combustion air blast pipe 24 junction in bellows 23 One piece of vertical deflection plate 231.Also it is plugged with ion bar 232, reflection on the end face of bellows 23 simultaneously Formula flame-observing hole 233 and lighter 234, lighter 234 junction point firelock 27.

Burner 2, by lighter 234 and burning torch 27 automatic ignition, passes through combustion air before igniting Blast pipe 24 automatic blowing, carries out fire defector and blowout protection by burning torch 27, by main combustion Gas inlet tube 25 carries out blast protection, combustion gas high-low pressure, burnt gas valve leak detection, thus ensures burning The safe operation of device 2.Burner 2 is provided with connection air door regulation servomotor 241, main combustion gas is entered Mouthful pipe 25 and the PID controller (not shown) of burning torch 27, it is achieved to fuel and air distribution Two-part dynamically regulates, it is achieved burning load regulation and the accurate regulation of flame, and follows the trail of in boiler Heating-up temperature, it is achieved the energy-conserving and environment-protective of burning.

Burner 2 uses the admission pressure of main fuel gas inlet pipe 25 to be 8-15kPa, combustion air blast pipe 24 connection aspiration pressure are 4-7kPa blower fan 4, can effectively overcome burner hearth 11 high back pressure, prevent stove Thorax 11 back pressure is too high causes heat supply not enough and burner hearth 11 surge, it is ensured that the even running of whole boiler. Premixed swirl device 26 is off setting in bellows 23, effectively raises burner hearth 11 thermal efficiency, Extend fire stroke, it is to avoid imperfect combustion, can adapt to greatest extent burner hearth 11 less time Needs.Described PID controller uses full-automatic proportion adjustment, beneficially timing monitoring, chain guarantor Protecting, intelligent operation adjusts with automatic, has stopped maloperation, has prevented accident potential to occur, it is ensured that The safe handling of whole boiler.Burner 2 uses the air through air preheater preheating to carry out Combustion-supporting, the thermal efficiency of boiler can be made to improve further.It is coated with on the inwall of premixer 22 and mixed fan housing 21 There is fire resistant coating, can effectively strengthen being subject to of the boiler body 1 adpting flange with bellows 23 junction Calorific intensity, extends the use cycle of this boiler boiler, and burner 2 is suitable for vertical and horizontal peace simultaneously Dress product.Burner 2 achieves air and combustion by premixed swirl device 26 and described PID controller 90% partly-premixed burning of gas, can effectively reduce the discharge of nitrogen oxides.

The afterbody of boiler is provided with energy-saving appliance 3, and energy-saving appliance 3 in the vertical direction is divided into the cigarette being positioned at bottom Air cooling room 31 and superposed hotair chamber 32, flue gas cooling chamber 31 and hotair chamber Separated by gas baffle 33 between 32.The bottom of hotair chamber 32 connects air intake passage 321, Air-out passage 322 connecting fan 4 is passed through on top, and blower fan 4 connects the combustion air blast pipe of burner 2 24, the combustion air entering burner 2 is preheated by hotair chamber 32.

The center of gas baffle 33 is one piece of comb plate, comb joint 34, comb plate, comb joint 34 is fixed with one vertical Heat exchanger 35, heat exchanger 35 includes some gravity-type heat exchanger tubes 351 being vertically arranged, every gravity Type heat exchanger tube 351 all runs through comb plate, comb joint 34.Therefore heat exchanger 35 is divided into two parts by comb plate, comb joint 34, Wherein top half is positioned at hotair chamber 32, and the latter half is positioned at flue gas cooling chamber 31.

The circumferential wall of flue gas cooling chamber 31 is provided with off-gas recovery mouth 311 and fume emission mouth 312.Cigarette Gas recovery port 311 connects the exhanst gas outlet 13 of boiler body 1.

Condensation heating surface 36 and non-condensing heating surface 37 it is provided with in flue gas cooling chamber 31.Wherein condensation is subject to Hot side 36 is between heat exchanger 35 and fume emission mouth 312, and non-condensing heating surface 37 is positioned at and changes Between hot device 35 and off-gas recovery mouth 311.

Wherein, condensation heating surface 36 includes bottom first header 362 bottom header 361, second, in Between header 363 and top header 364.It is provided with between header 361 and intermediate header 363 bottom first If the first of dried layer level time condensation hoop fin tube layer 365, header 361 and middle collection bottom second If being provided with second time condensation hoop fin tube layer 366 of dried layer level, intermediate header 363 between case 363 And if being equipped with the upper condensation hoop fin tube layer 367 of dried layer level between top header 364.

Every layer of first time condensation hoop fin tube layer 365 and every layer of upper condensation hoop fin tube layer 367 are equal There are the condensation hoop finned tube that quantity is equal and arranged in parallel, first time adjacent condensation hoop fin Tube layer 365, and adjacent upper condensation hoop fin tube layer 367 be all staggered floor arrange.First end Between portion's header 361 and first time condensation hoop fin tube layer 365 of lowermost end, adjacent first time Between condensation hoop fin tube layer 365, intermediate header 363 condenses hoop wing first time with top Between sheet tube layer 365, between intermediate header 363 and the upper condensation hoop fin tube layer 367 of lowermost end, Between adjacent upper condensation hoop fin tube layer 367, top header 364 and the upper condensation ring of top Between fin tube layer 367 all by with arbitrary upper condensation hoop fin tube layer 367 or arbitrary first times The condensation bend pipe 368 condensing hoop finned tube quantity equal in condensation hoop fin tube layer 365 connects, To be formed between header 361 bottom top header 364 and first and arbitrary first time condensation hoop wing Sheet tube layer 365 or arbitrary upper condensation hoop fin tube layer 367 condense hoop finned tube quantity equal Warm water flow channels, the warm water in this warm water flow channels is at adjacent first time condensation ring of any two-layer Flowing side in the upper condensation hoop fin tube layer 367 that fin tube layer 365 or any two-layer are adjacent To being contrary, so extend warm water flow process in condensation heating surface 36, it is achieved with filling of flue gas Divide heat exchange.And first time condensation hoop fin tube layer 365 that arbitrarily two-layer is adjacent, and arbitrarily two-layer Adjacent upper condensation hoop fin tube layer 367 is all that staggered floor is arranged, makes condensation bend pipe 368 tilt to set Put, the most also can extend the length of condensation bend pipe 368, thus extend warm water further and be heated in condensation Flow process in face 36.In the present embodiment, the quantity of this warm water flow channels is three.

Every layer of second time condensation hoop fin tube layer 366 all has the condensation that quantity is equal and arranged in parallel Hoop finned tube, second time condensation hoop fin tube layer 366 of adjacent two-layer is that staggered floor is arranged.The Bottom two between second time condensation hoop fin tube layer 366 of header 362 and lowermost end, adjacent the Between two times condensation hoop fin tube layer 366, intermediate header 363 condenses ring second time with top All by condensing hoop wing in hoop fin tube layer 366 with arbitrary second time between fin tube layer 366 The condensation bend pipe 368 that sheet pipe quantity is equal connects, with header 362 bottom second and intermediate header 363 Between formed with arbitrary second time condensation hoop fin tube layer 366 in condensation hoop finned tube quantity equal Warm water flow channels, warm water is in adjacent second time condensation hoop fin tube layer 366 of any two-layer Flow direction be contrary, so extend warm water condensation heating surface 36 in flow process, it is achieved with The abundant heat exchange of flue gas.And second time condensation hoop fin tube layer 366 that arbitrarily two-layer is adjacent is also wrong Layer is arranged, makes condensation bend pipe 368 be obliquely installed, and the most also can extend the length of condensation bend pipe 368, Thus extend warm water flow process in condensation heating surface 36 further.In the present embodiment, this warm water mistake The quantity of circulation road is four.

The bottom of condensation heating surface 36 is provided with condensed water base.

Non-condensing heating surface 37 includes the first header 371 and the second header 372.First header 371 Top in the second header 372.If being provided with dried layer water between the first header 371 and the second header 372 Flat non-condensing hoop fin tube layer 373.Every layer of non-condensing hoop fin tube layer 373 is equipped with quantity Non-condensing hoop finned tube equal and arranged in parallel, the second header 372 and the non-condensing of lowermost end Between hoop fin tube layer 373, between the two-layer non-condensing hoop fin tube layer 373 of arbitrary neighborhood, All by non-cold with arbitrary between non-condensing hoop fin tube layer 373 and first header 371 of top The non-condensing bend pipe 374 that in solidifying hoop fin tube layer 373, non-condensing hoop finned tube quantity is equal is even Connect, to be formed and arbitrary non-condensing hoop finned tube between the second header 372 and the first header 371 The hot water flow channels that in layer 373, non-condensing hoop finned tube quantity is equal, hot water is at arbitrary neighborhood Flow direction in two-layer non-condensing hoop fin tube layer 373 is contrary, so extends hot water non- Flow process in condensation heating surface 37, it is achieved with the abundant heat exchange of flue gas.And any adjacent non-of two-layer Condensation hoop fin tube layer 373 is also that staggered floor is arranged.Non-condensing bend pipe 374 is made to be obliquely installed, this Sample also can extend the length of non-condensing bend pipe 374, thus extends hot water further at non-condensing heating surface Flow process in 37.In the present embodiment, the quantity of this hot water flow channels is three.

The bottom of non-condensing heating surface 37 is provided with non-condensing water tube base.

Bottom first, bottom header 361 and second, the entrance point of header 362 connects 5 water pumps, first end Bottom portion's header 361 and second, the warm water in header 362 is along warm water flow channels, in flowing up through Between header 363, eventually enter into top header 364.Top header 364 connects the second header 372, top Warm water in portion's header 364 enters the second header 372, and the warm water in the second header 372 is along non-cold Hot water flow channels in solidifying heating surface 37, flows upwardly into the first header 371 and is entered one by entering flue gas Step is heated to be hot water, and the first header 371 connects the lower annular header 17 of boiler body 1, the first header Hot water in 371 flows into the lower annular header 17 of boiler body 1.

Wherein, the condensation hoop finned tube employed in condensation heating surface 36 and the anti-corruption of condensation bend pipe Erosion performance should be higher than that the non-condensing hoop finned tube employed in non-condensing heating surface 37 and non-condensing are curved The corrosion resistance of pipe.This is because the water temperature ratio in condensation heating surface 36 is relatively low, condense heating surface 36 produce a large amount of condensed waters with the smoke contacts of low temperature, select resistant material.Non-condensing heating surface Water in 37 has carried out heat exchange with high-temperature flue gas and water temperature is higher, non-condensing heating surface 37 and high temperature Smoke contacts will not produce any condensate corrosion phenomenon, can use the steel of less expensive.Water exists After non-condensing heating surface 37 is further heated, enter the lower annular header 17 of boiler body 1.

By non-condensing heating surface 37, heat exchanger 35 and the combination of condensation heating surface 36, the most permissible Preventing energy-saving appliance 3 from corroding, safety and reliability simultaneously, service life is longer.

The gravity-type heat exchanger tube 351 of heat exchanger 35 utilizes the flue gas heat from non-condensing heating surface 37 After heating to the cold air in hotair chamber 32, then being entered by blower fan 4 after being heated is made to fire Burner 2, the wall temperature that the character of gravity-type heat exchanger tube 351 itself determines gravity-type heat exchanger tube 351 is inclined High, it is to avoid on gravity-type heat exchanger tube 351, condensation to occur.

Energy-saving appliance 3, heating simultaneously enters temperature and the inflow temperature of the air of burner 2, breakthrough Solve conventional vertical gas boiler and only heat the defect of temperature of the air entering burner 2, Bigization reclaims heat, also solves the single condensation of tradition horizontal gas-fired boiler and reclaims the steel use caused Measure the shortcomings such as excessive and floor space is big.

Energy-saving appliance 3 is air preheater, is again flue gas cooling device, is also into water heater.

A kind of Natural Circulation condensing boiler of the present utility model also includes base 7, platform staircase 71 and control Cabinet 6 processed.

Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to Bright this utility model, and it is not used as to restriction of the present utility model, as long as of the present utility model In spirit, change, the modification of embodiment described above all will be fallen of the present utility model In Claims scope.

Claims (7)

1. a vertical Natural Circulation condensing boiler burner, including the most sequentially coaxially setting Mixed fan housing, premixer and the bellows put, on the outer circle wall of described bellows, the combustion air of connection level enters Airduct；It is characterized in that:

The center of described bellows end face is plugged with a main fuel gas inlet vertically stretching into described mixed fan housing Pipe, is provided with one and vertically stretches into described mixed between described main fuel gas inlet pipe and described combustion air blast pipe The premixed swirl device of fan housing, is provided with between described premixed swirl device and described combustion air blast pipe and vertically stretches Enter the burning torch of described mixed fan housing；

Described combustion air blast pipe connection blower fan, described blower fan connection air preheater.

One the most according to claim 1 vertical Natural Circulation condensing boiler burner, its It is characterised by: described bellows and described combustion air blast pipe junction are provided with deflection plate.

One the most according to claim 1 vertical Natural Circulation condensing boiler burner, its It is characterised by: the top of described combustion air blast pipe is provided with air door regulation servomotor.

One the most according to claim 3 vertical Natural Circulation condensing boiler burner, its It is characterised by: this burner is provided with connection described air door regulation servomotor and described main fuel gas inlet The PID controller of pipe.

One the most according to claim 1 vertical Natural Circulation condensing boiler burner, its It is characterised by: the bottom of described burning torch is higher than the bottom of described premixed swirl device.

One the most according to claim 1 vertical Natural Circulation condensing boiler burner, its It is characterised by: on the end face of described bellows, be plugged with ion bar, reflective flame-observing hole and lighter, institute State lighter and connect described burning torch.

One the most according to claim 1 vertical Natural Circulation condensing boiler burner, its It is characterised by: on the inwall of described premixer and described mixed fan housing, scribble fire resistant coating.