CN209458925U - Full premix combustion device and boiler is premixed entirely - Google Patents

Abstract

The utility model discloses a kind of full premix combustion device and premixes boiler entirely, wherein full premix combustion device includes: the first burner；First burner has combustion front；First burner can input the gas after premixing and burn in the combustion front；Second burner；Second burner has gas output section；Wherein, the gas output section of at least described second burner is located at the upstream of the combustion front；Ignition electrode positioned at the downstream of the combustion front；The ignition electrode is used to light the gas of the gas output section output.Full premix combustion device provided herein and boiler is premixed entirely, can form reliable cooling to ignition structure, avoid ignition structure high temperature failure.

Description

Full premix combustion device and boiler is premixed entirely

Technical field

Boiler is premixed this application involves field of combustion equipment more particularly to a kind of full premix combustion device and entirely.

Background technique

Full premix combustion device will mix the device of the gas fuel burning of completion in the premix chamber of blower.In existing skill A part of full premix combustion device in art is especially applied in premix field of boilers entirely, may include burner, blower and point Fiery needle etc..After fuel gas enters burner, sprayed from the fire hole on the side wall of burner.

To realize ignition security, detonation is avoided, full premix boiler is commonly provided with small fire and lights a fire.It burns in boiler startup When first pass through ignition electrode to ignitron point small fire, then after the small fire normal table burning of ignitron, then burner is passed through premix Gas is simultaneously ignited by small fire, forms burning.

Existing ignitron is in inside burner hearth, and during burner combustion, ignitron will receive the height inside burner hearth Temperature radiation, be easy to cause igniting high temperature failure.

Utility model content

In view of the deficiencies in the prior art, the purpose of the application is to provide a kind of full premix combustion device and premixes pot entirely Furnace avoids ignition structure high temperature failure can form reliable cooling to ignition structure.

In order to achieve the above objectives, the application adopts the following technical scheme that

A kind of full premix combustion device, comprising:

First burner；First burner has combustion front；First burner can input the gas after premix And it burns in the combustion front；

Second burner；Second burner has gas output section；Wherein, the gas of at least described second burner Output section is located at the upstream of the combustion front；

Ignition electrode positioned at the downstream of the combustion front；The ignition electrode is used to light the gas of the gas output section output Body.

As a preferred embodiment, first burner is tubular；The combustion front is located at first combustion The side wall of burner；The gas output section of at least described second burner is located at the inside of first burner；The ignition electrode Outside first burner.

As a preferred embodiment, the gas output section is arranged close to the ignition electrode.

As a preferred embodiment, the gas output section is arranged close to the inner wall of first burner.

As a preferred embodiment, the inner wall of first burner is equipped with flow-guiding structure, the flow-guiding structure Combustion front described in gas targeting part for being exported the gas output section, the ignition electrode are fired close to described in the part The setting of burning face.

As a preferred embodiment, the gas that the gas output section is exported can be oriented to by the flow-guiding structure To the part combustion front of the neighbouring gas output section.

As a preferred embodiment, the flow-guiding structure includes being fixed on leading on first burner inner wall To plate；The guide plate is located at outside the gas output section.

As a preferred embodiment, the inner wall of the guide plate and part first burner enclose be configured to it is defeated Space out；The gas output section is located in the output space；The part combustion front is located on the outer wall in the output space.

As a preferred embodiment, second burner is located at length in first burner and described The relationship of spacing distance between the length of ignition electrode, the top of the ignition electrode and the top of the guide plate are as follows:

H=l ± 0.3d

Wherein, h is that second burner is located at the length in first burner；L is the length of the ignition electrode； D is the spacing distance between the top of the ignition electrode and the top of the guide plate.

As a preferred embodiment, the interval distance between the top of the ignition electrode and the top of the guide plate Length from the ignition electrode for 0.1 times to 0.4 times.

As a preferred embodiment, second burner be located at length in first burner with it is described The ratio of the length of first burner are as follows: 0.1-0.6.

As a preferred embodiment, the quantity of second burner is multiple；Multiple second burners Circumferentially arrange；The quantity of the ignition electrode is multiple；Multiple ignition electrodes are circumferentially arranged.

As a preferred embodiment, second burner includes the burning in first burner Pipe, the lower end with delivery outlet of the combustion tube forms the gas output section.

As a preferred embodiment, the upstream of first burner is connected with mixing arrangement；The mixing dress Fuel gas inlet end and air inlet end are installed；Second burner is used for combustion gas input port；The fuel gas inlet end and institute It states combustion gas input port and is connected to same gas source, to input fuel gas.

As a preferred embodiment, being equipped with flow control valve between second burner and the gas source.

As a preferred embodiment, the fuel gas flow of combustion gas input port input is described in 0.1 times Below the maximum fuel gas flow of first burner input.

A kind of full premix boiler, comprising: full premix combustion device described in any embodiment as above.

As a preferred embodiment, the full premix combustion boiler has shell；At least partly described first combustion Burner is located in the shell, and at least partly described second burner is located in the shell；Wherein, second burner position Part in the shell is located in first burner.

The utility model has the advantages that

Full premix combustion device provided by the present embodiment, by setting the gas output section of at least described second burner It is placed in the upstream of combustion front, the gas after premix in such first burner can be located at the first burner to the second burner In part cooling is blowed, and it is possible to the second burner and direct flame contact be avoided, so as to effectively prevent The failure of two burner high temperatures.

Referring to following description and accompanying drawings, the particular implementation of the utility model is disclosed in detail, specifies practical Novel principle can be in a manner of adopted.It should be understood that the embodiments of the present invention in range not thus by Limitation.In the range of the spirit and terms of appended claims, the embodiments of the present invention includes many changes, modifications With it is equivalent.

The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.

It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those skilled in the art, without any creative labor, It is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of structural schematic diagram of full premix combustion device provided in the embodiment of the present application；

Fig. 2 is deflector structure schematic diagram different provided in the embodiment of the present application；

Fig. 3 is the second burner structure schematic diagram provided by the application one embodiment；

Fig. 4 is the second burner structure schematic diagram provided by another embodiment of the application；

Fig. 5 is the second burner structure schematic diagram provided by another embodiment of the application；

Fig. 6 is the second burner structure schematic diagram provided by another embodiment of the application；

Fig. 7 is the schematic diagram of full premix combustion device provided by another embodiment of the application.

Specific embodiment

In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model In embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work The range of the utility model protection all should belong in example.

It should be noted that it can directly on the other element when element is referred to as " being set to " another element Or there may also be another elements placed in the middle.When an element is considered as " connection " another element, it be can be directly It is connected to another element in succession or may be simultaneously present another element placed in the middle.Term as used herein " vertically ", " water It is flat ", "left", "right" and similar statement for illustrative purposes only, be not meant to be the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" packet Include any and all combinations of one or more related listed items.

Fig. 1 is please referred to Fig. 7.A kind of full premix combustion device, the full premix combustion are provided in the application one embodiment Device can be applied to premix in boiler entirely.Specifically, full premix combustion device include: the first burner 2, the second burner 3, And ignition electrode 4.Wherein, first burner 2 has combustion front 5；First burner 2 can input the gas after premix And it burns in the combustion front 5.Second burner 3 has gas output section 19；Wherein, at least described second burner 3 Gas output section 19 be located at the upstream of the combustion front 5.Ignition electrode 4 positioned at the downstream of the combustion front 5；The ignition electrode 4 gases exported for lighting the gas output section 19.

When using full premix combustion device in the present embodiment, the gas of the second burner 3 output flows to combustion front 5, Then, ignition electrode 4 forms small fire after lighting the gas that the second burner 3 exports on combustion front 5, then by the small fire by the Gas ignition after the premix of one burner 2 output, forms in combustion front 5 and burns, thus the entire combustion front 5 that ignites.First combustion Burner 2 the second burner 3 export light after input premixed gas again.

Full premix combustion device provided by the present embodiment, by by the gas output section of at least described second burner 3 19 are set to the upstream of combustion front 5, and the gas after premix in the first burner 2 can be located at the first combustion to the second burner 3 Cooling is blowed in part in burner 2, also, the second burner 3 avoids and direct flame contact, so can be effectively prevented The failure of second burner high temperature.

Meanwhile first burner 2 can be located at the partial occlusion hyperthermia radiation in the first burner 2 to the second burner 3, Influence of the hyperthermia radiation to the second burner 3 is further decreased, 3 high temperature failure of the second burner is avoided.

The gas output section 19 of at least described second burner 3 in the present embodiment is located at the upstream of the combustion front 5, from And the gas wind that can receive always after the premix of burned 5 upstream of face is cooling, reduces the temperature of at least partly the second burner 3 Degree, flame are formed on combustion front 5, avoid the second burner 3 and direct flame contact, the second burning so can be effectively prevented Device high temperature failure, moreover it is possible to which reducing the hyperthermia radiation that the burning of the first burner 2 is formed influences, and the generation of the second burner 3 is effectively reduced The problem of high temperature failure.

In the present embodiment, the second burner 3 is for igniting the first burner 2.First burner 2 is full premix combustion The main burner of device.The gas of second burner 3 output can form flame (flammule) on combustion front 5, small by this Flame burns the premixed gas that the first burner 2 exports on combustion front 5, avoids the generation of detonation problem in ignition process.

In other embodiments, the first burner can be flat burner, or tubular burner.In plate In the embodiment of formula burner, at least partly combustion front is plane, correspondingly, the upstream input premixed gas of combustion front, second Burner is located at the upstream of the combustion front, correspondingly, the second burner will receive the quenching effect of premixed gas.

In the present embodiment, first burner 2 is tubular, that is, the first burner 2 is tubular burner, it is described Combustion front 5 is located at the side wall of first burner 2.Preferably, the first burner 2 can be cylindrical structure.In addition, the first combustion Burner 2 or other tubular structures, such as prism-shaped or other shapes, the application do not repel the tubular knot of other shapes Structure.The side wall of cylindrical body can be equipped with multiple fire holes 16, to form combustion front 5.Premixed gas in first burner 2 is (pre- Gas after mixed) it can be discharged from fire hole 16.

In the present embodiment, the upper end of the first burner 2 of tubular has entrance, to input premixed gas.First burning The flow direction of device 2 and the gas in the second burner 3 can be (substantially) same or parallel.Wherein, the first burner 2 input premix gas Body can be the mixed gas of fuel gas and air.Wherein, fuel gas can be natural gas, coal gas etc..Pre-mixing apparatus will Fuel gas and air mixing, and inputted in full premix combustion device by the entrance of the first burner of outlet 2 of blower 8.

In the present embodiment, the lateral wall of tubular burner forms combustion front 5, is distributed on the side wall of the first burner 2 There is fire hole 16.Fire hole 16 can be uniformly distributed in the side wall of the first burner 2 and can not also be limited with uneven distribution, the application It is fixed.For example, 16 density of fire hole of the sidewall areas of the neighbouring gas output section 19 and 16 density of fire hole of other sidewall areas It is different.

It, can also be in addition, the structure (size, shape) of the different fire holes 16 on the side wall of the first burner 2 can be identical It is different.For example, 16 structure of fire hole of the sidewall areas of the neighbouring gas output section 19 and 16 knot of fire hole of other sidewall areas Structure is different.Certainly, the application do not repel the sidewall areas of the neighbouring gas output section 19 16 density of fire hole or shape with 16 density of fire hole or the identical scheme of shape of other sidewall areas.

In the present embodiment, the gas output section 19 of at least described second burner 3 is located at the interior of first burner 2 Portion.Specifically, second burner 3 includes the combustion tube in first burner 2.Having for the combustion tube is defeated The lower end of outlet forms the gas output section 19.The ignition electrode 4 is located at outside first burner 2.

Wherein, as shown in figure 3, the pipe end in combustion tube can be set in gas output section 19.Second burner 3 has gas The end of body outlet forms gas output section 19.Correspondingly, gas output section 19 or other portions of the second burner 3 Position, for example, as shown in Figure 4-Figure 6, gas vent being equally equipped on the side wall of combustion tube, forms corresponding gas output section 19.Gas output section 19 can be through-hole structure, or nozzle arrangements etc., it can be in the first burner 2 by the second combustion Gas output in burner 3.

In embodiment as shown in figures 3 to 6, gas output section 19 can be located at the pipe end of the second burner 3, can also be with Positioned at the side wall of the second burner 3.Wherein, gas output section 19 is equipped with borehole structure, can also be equipped with long pore structure.Also, It can be one (such as Fig. 3, Fig. 4) that gas output section 19, which has gas delivery outlet,；May be multiple (such as Fig. 5, Fig. 6), And it is distributed in the side of the second burner 3 of tubulose.

For the gas ignition convenient for being exported gas output section 19, avoid that ignition electrode is separately provided for the second burner 3 4, the gas output section 19 is arranged close to the ignition electrode 4.In this way, the ignition electrode 4 outside the first burner 2 can be directly used The ignition operation of the second burner 3 is carried out, manufacturing cost is reduced.

In the present embodiment, to light a fire convenient for ignition electrode 4 to the second burner 3, the gas output section 19 is close The inner wall of first burner 2 is arranged.Second burner 3 is non-in the first burner 2 to be centrally located, close to the first burner 2 inner wall setting, in order to be exported to neighbouring combustion front 5.

In the present embodiment, the inner wall of first burner 2 can be equipped with flow-guiding structure.The flow-guiding structure is used for will Combustion front 5 described in the gas targeting part that the gas output section 19 is exported, the ignition electrode 4 burn close to described in the part Face 5 is arranged.Flow-guiding structure can be fixed on the inner wall of the first burner 2, and fixed form can be to weld, be spirally connected, riveting Etc. being fixedly connected with mode.Certainly, the scheme that flow-guiding structure and the first burner 2 are structure as a whole is not discharged yet in the application.

And to avoid forming the flowing of premixed gas excessive blocking convenient for setting, guarantee premixed gas first Smooth and regular supply is flowed in burner 2, the gas that the gas output section 19 is exported can be oriented to by the flow-guiding structure , so can be excessive to avoid flow-guiding structure is processed to the part combustion front 5 of the neighbouring gas output section 19, it is convenient for Manufacture.

Specifically, the flow-guiding structure includes the guide plate 6 being fixed on 2 inner wall of the first burner.The guiding Plate 6 is located at outside the gas output section 19.In this embodiment, the inner wall of the side of guide plate 6 and the first burner 2 seals Welding forms the water conservancy diversion cover structure for being located at 2 end of the first burner.

As shown in Figure 1 and Figure 2.The inner wall of the guide plate 6 and part first burner 2, which encloses, is configured to output space 17.The gas output section 19 is located in the output space 17.The part combustion front 5 is located at the outer wall in the output space 17 On.After gas output section 19 exports fuel gas, fuel gas is mixed with air in the output space 17 and is flowed to combustion front 5 It is dynamic, under the ignition action of ignition electrode 4, burning is formed on the part combustion front 5 corresponding to output space 17.

As shown in Fig. 2, the upper end in output space 17 has opening 18, the second burner 3 is extended downwardly into from the opening 18 It exports in space 17, is surrounded by the inner wall (the part combustion front 5) of guide plate 6, the first burner of part 2.Gas output section 19 are located in the output space 17, and the fuel gas that gas output section 19 is exported enters in output space 17, then pass through portion The fire hole 16 of dosis refracta forms combustion flame in the corresponding part combustion front 5.

The output space 17 that the inner wall of guide plate 6 and the first burner of part 2 encloses structure, which is formed, is similar to prismatic space, should The open at one end of prismatic space is protruded into for the second burner 3.Wherein, the tool in the output space 17 of 6 or enclosed composition of guide plate Shape does not limit, the guide plate 6c of substantially rectangular shape that can be as shown in Figure 2, or as shown in Figure 2 big The guide plate 6b for triangular prism shape is caused, alternatively, guide plate 6a of substantially quadrangular shape etc. as shown in Figure 2.

In other embodiments, it also may not need setting flow-guiding structure.For example, as shown in figure 3, the pipe end of combustion tube is arranged Warp architecture, by the opening of gas output section 19 towards the inner wall of the first burner 2, so as to the gas that will directly be exported It exports to the part combustion front 5 of the neighbouring gas output section 19, and forms burning on the part combustion front 5.

As shown in Figure 7.In a preferred embodiment, second burner 3 is located in first burner 2 Spacing distance between length and the length of the ignition electrode 4, the top of the ignition electrode 4 and the top of the guide plate 6 Relationship are as follows:

H=l ± 0.3d

Wherein, h is that second burner 3 is located at the length in first burner 2；L is the length of the ignition electrode 4 Degree；D is the spacing distance between the top of the ignition electrode 4 and the top of the guide plate 6.H, the unit of l, d are identical.

Spacing distance between the top of the ignition electrode 4 and the top of the guide plate 6 is 0.1 times to 0.4 times of institute State the length of ignition electrode 4.That is, d=0.1 × l~0.4 × l.

In the present embodiment, second burner 3 is located at length and first burning in first burner 2 The ratio of the length of device 2 are as follows: 0.1-0.6.In the embodiment shown in fig. 1, the first burner 2 is located in shell 1, the first combustion The length of burner 2 is the length of the cylinder in shell 1.

In a preferred embodiment, to further decrease detonation probability, the safety of increasing ignition.Second combustion The quantity of burner 3 is multiple.Multiple second burners 3 are circumferentially arranged；The quantity of the ignition electrode 4 is multiple；It is multiple The ignition electrode 4 is circumferentially arranged.Wherein, ignition electrode 4 can be arranged in a one-to-one correspondence with the second burner 3.Specifically, multiple Two burners 3 circumferentially can uniformly arrange, correspondingly, multiple ignition electrodes 4 circumferentially can also uniformly arrange.

In the present embodiment, supply the second burner 3 can be non-premixed gas, such as: fuel gas.Second burning The gas output section 19 of device 3 is located at the inside of the first burner 2, air needed for burning can be provided in the first burner 2, phase It answers, the fuel gas that gas output section 19 exports mutually mixes before flowing out the first burner 2 with the air in the first burner 2 It closes, reaches the condition of burning.Certainly, in other embodiments, the second burner 3 of supply or premixed gas, the application And with no restriction.

In the present embodiment, the upstream of first burner 2 can connect mixing arrangement.The mixing arrangement is equipped with Fuel gas inlet end 10 and air inlet end 11.Second burner 3 is used for combustion gas input port.Air inlet end 11 is for receiving The air of external world's input, to provide burning required oxygen.The fuel gas inlet end 10 is connected to same with the combustion gas input port Gas source, to input fuel gas.Specifically, the air inlet of blower 8 can be equipped with Venturi tube structure 9, air inlet end 11 and combustion Gas arrival end 10 is set on Venturi tube structure 9.

In the present embodiment, flow control valve 15 is equipped between second burner 3 and the gas source.Pass through the flow The adjustable fuel gas flow supplied to the second burner 3 of regulating valve 15.Certainly, which also can control To the on-off of the second burner 3 supply fuel gas.

As shown in Figure 1.Fuel gas inlet end 10 is connected with gas inlet pipe 12, and gas inlet pipe 12 is equipped with main air valve 13. Flow control valve 15 is connected with gas inlet pipe 12, and is connected to the upstream of main air valve 13.Second burner 3 can pass through pipe 14 residual current adjustable valve 15 of road is connected.The first burner 2 can be respectively regulated to by main air valve 13 and flow control valve 15 Gas is supplied in the second burner 3, the time control for supplying gas into the first burner 2 and the second burner 3 is realized, protects Card igniting is gone on smoothly.Parallel relationship

In the present embodiment, first burner 2 of the fuel gas flow of the combustion gas input port input at 0.1 times Below the maximum fuel gas flow of input.

In other embodiments, it is not excluded that the fuel gas that the second burner 3 and the first burner 2 are inputted is not from The scheme of same gas source.Certainly, the second burner 3 scheme different with the fuel gas of the first burner 2 inputted, this Shen Do not repel equally please.

In the embodiment that the full premix combustion device is applied to full premix boiler, the full premix boiler has shell 1.Correspondingly, at least partly described first burner 2 is located in the shell 1, at least partly described second burner 3 is located at institute It states in shell 1.Wherein, second burner 3 is located at the part in the shell 1 and is located in first burner 2.Such as In embodiment shown in FIG. 1, the first burner 2 of tubular is fixed on shell 1, and the second burner 3 of combustion tube structure is located at In shell 1.

Chamber inside shell 1 forms burner hearth 7.First burner 2 is located in the chamber, and the second burner 3 is located at first In burner 2.Shell 1 is equipped with the exhanst gas outlet with chamber.Heat exchanger tube can be equipped in shell 1.Ignition electrode 4 is located at the Outside one burner 2.For the blast tube for making full use of the first burner 2, detonation probability is reduced, ignition electrode 4 is adjacent to the first burning The entrance of device 2 is arranged.

In the present embodiment, the first burner 2 is communicated with blower 8.The entrance of first burner 2 is arranged upward, and blower 8 is set It is placed in the top of the first burner 2.Exhanst gas outlet is located at the lower part of shell 1.Fuel gas enters the first burner 2 from top to bottom In.Correspondingly, the flue gas that burning generates also substantially is discharged from exhanst gas outlet from top to bottom.

Using this kind of structure, fuel gas and flue gas not only can be by gravity, to further increase fuel gas With the flow velocity of flue gas, blower 8 can also be carried using shell 1, to reduce the volume of full premix boiler.

Certainly, in other optional embodiments, the entrance of the first burner 2 is located at the lower part of shell 1, with the first combustion The corresponding blower 8 of the entrance of burner 2 also can be set in the lower part of shell 1, correspondingly, exhanst gas outlet is located at the top of shell 1, Blower 8 is located at the lower section of the first burner 2.

Another embodiment of the application also provides a kind of full premix boiler, comprising: complete pre- described in any embodiment as above Mixed burner.

It should be noted that term " first ", " second " etc. are used for description purposes only and distinguish in the description of the present application Similar object between the two and is not present sequencing, can not be interpreted as indication or suggestion relative importance.In addition, In the description of the present application, unless otherwise indicated, the meaning of " plurality " is two or more.

Herein cited any digital value all include between lower limit value to upper limit value with the lower value of an incremented and The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as Fruit elaborates that the quantity an of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20 To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification 68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1. These are only intended to the example clearly expressed, it is believed that all possibility for the numerical value enumerated between minimum and peak Combination is all expressly set forth in the specification in a similar manner.

It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to appended claims and this The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims Any aspect is not intended to abandon the body matter, also should not be considered as inventor the theme is not thought of as it is disclosed A part of utility model theme.

Claims (18)

1. a kind of full premix combustion device characterized by comprising

First burner；First burner has combustion front；First burner can input premix after gas and The combustion front burning；

Second burner；Second burner has gas output section；Wherein, the gas output of at least described second burner Portion is located at the upstream of the combustion front；

Ignition electrode positioned at the downstream of the combustion front；The ignition electrode is used to light the gas of the gas output section output.

2. full premix combustion device as described in claim 1, which is characterized in that first burner is tubular；The combustion Burning face is located at the side wall of first burner；The gas output section of at least described second burner is located at first burner Inside；The ignition electrode is located at outside first burner.

3. full premix combustion device as claimed in claim 2, which is characterized in that the gas output section is close to the ignition electrode Setting.

4. full premix combustion device as claimed in claim 2, which is characterized in that the gas output section is close to first combustion The inner wall of burner is arranged.

5. full premix combustion device as claimed in claim 2, which is characterized in that the inner wall of first burner is equipped with water conservancy diversion Structure, the flow-guiding structure are used for combustion front described in the gas targeting part that is exported the gas output section, the igniting Needle is arranged close to combustion front described in the part.

6. full premix combustion device as claimed in claim 5, which is characterized in that the flow-guiding structure can export the gas The gas that portion is exported is directed to the part combustion front of the neighbouring gas output section.

7. such as full premix combustion device described in claim 5 or 6, which is characterized in that the flow-guiding structure includes being fixed on institute State the guide plate on the first burner inner wall；The guide plate is located at outside the gas output section.

8. full premix combustion device as claimed in claim 7, which is characterized in that first burning of the guide plate and part The inner wall of device, which encloses, is configured to output space；The gas output section is located in the output space；The part combustion front is located at On the outer wall in the output space.

9. full premix combustion device as claimed in claim 8, which is characterized in that second burner is located at first combustion The length of length and the ignition electrode, the top of the ignition electrode in burner and the interval distance between the top of the guide plate From relationship are as follows:

H=l ± 0.3d

Wherein, h is that second burner is located at the length in first burner；L is the length of the ignition electrode；D is Spacing distance between the top of the ignition electrode and the top of the guide plate.

10. full premix combustion device as claimed in claim 9, which is characterized in that the top of the ignition electrode and the guiding The length for the ignition electrode that spacing distance between the top of plate is 0.1 times to 0.4 times.

11. full premix combustion device as described in claim 1, which is characterized in that second burner is located at described first The ratio of the length of length and first burner in burner are as follows: 0.1-0.6.

12. full premix combustion device as described in claim 1, which is characterized in that the quantity of second burner is multiple； Multiple second burners are circumferentially arranged；The quantity of the ignition electrode is multiple；Multiple ignition electrodes are circumferentially arranged.

13. full premix combustion device as described in claim 1, which is characterized in that second burner includes positioned at described Combustion tube in first burner, the lower end with delivery outlet of the combustion tube form the gas output section.

14. full premix combustion device as described in claim 1, which is characterized in that the upstream of first burner is connected with Mixing arrangement；The mixing arrangement is equipped with fuel gas inlet end and air inlet end；Second burner is used for combustion gas input port； The fuel gas inlet end is connected to same gas source with the combustion gas input port, to input fuel gas.

15. full premix combustion device as claimed in claim 14, which is characterized in that second burner and the gas source it Between be equipped with flow control valve.

16. full premix combustion device as claimed in claim 14, which is characterized in that the fuel gas of the combustion gas input port input Body flow is below the maximum fuel gas flow of 0.1 times of first burner input.

17. a kind of full premix boiler characterized by comprising the full premix combustion dress as described in claim 1 to 16 is any It sets.

18. full premix boiler as claimed in claim 17, which is characterized in that the full premix combustion boiler has shell；Extremely First burner described in small part is located in the shell, and at least partly described second burner is located in the shell；Wherein, Second burner is located at the part in the shell and is located in first burner.