CN208859602U - A kind of half pre-mixing type combustion apapratus for gas fired-boiler - Google Patents

Abstract

The utility model discloses a kind of half pre-mixing type combustion apapratus for gas fired-boiler, including hollow burner body, the lower part of burner body is provided with fuel gas inlet pipe, gas outlet pipe is provided at the top of burner body, it is characterized in that, the outer cover of gas outlet pipe is equipped with mixing drum, there is gap between mixing drum and gas outlet pipe, the bottom of mixing drum is equipped with a wind inlet, mixed gas outlet is provided at the top of mixing drum, the external top of mixed gas outlet is provided with flame stabilization ring, sparking bar is provided at the inside center of flame stabilization ring, the head end of sparking bar extend downwardly and penetrate in gas outlet pipe after downward through burner body, ignitor corresponding with the sparking end of bar is additionally provided on burner body.Ensure that combustion gas and air first carry out first time premixing in mixing drum, then carried out again with the Secondary Air outside mixing drum it is secondary be thoroughly mixed, make more abundant, high combustion efficiency of burning.

Description

A kind of half pre-mixing type combustion apapratus for gas fired-boiler

Technical field

The utility model relates to technical field of burner, it particularly relates to a kind of for the half premixed of gas fired-boiler Burner.

Background technique

Burner is a kind of a kind of equipment that substance is converted to thermal energy by this chemical reaction mode of burning, i.e., by air Proper proportion mix and convert is pressed by pre-mixing apparatus with fuel, is sent into furnace by required concentration, speed, turbulivity and hybrid mode Thorax, and enable the heat energy apparatus of fuel stable ignition and burning in burner hearth.Fuel is based on fuel oil or combustion gas.It is typically employed in On middle-size and small-size fuel oil or gas fired-boiler.

Burner is divided by structure are as follows: monoblock type burner, Split type combustion device.And Split type combustion device ought be used for industry When the fields such as boiler for producing, the optimization in structure is very crucial.

It is burnt in head in traditional high-pressure injection burner, combustion gas and combustion air are mixed in combustion head end by special device It closes, flame is located at combustion head exit, therefore can spread in the bags, and it is big that flame size depends on burner output It is small.Therefore there are many disadvantages causes combustion gas to be unable to fully burn such as combustion gas and combustion air undercompounding, gas burning Low efficiency, and generate many pernicious gases.Due to high-pressure injection, so that combustion flame impact force is big, risk is high.Flue gas row It puts coefficient and standard requirements is not achieved, it is very big to environmental effects.

For the problems in the relevant technologies, currently no effective solution has been proposed.

Utility model content

For above-mentioned technical problem in the related technology, the utility model proposes a kind of for the half premixed of gas fired-boiler Burner, the discharge after can making burning are more environmentally friendly.

To realize the above-mentioned technical purpose, the technical solution of the utility model is achieved in that

A kind of half pre-mixing type combustion apapratus for gas fired-boiler, including hollow burner body, the burner body Lower part be provided with fuel gas inlet pipe, gas outlet pipe is provided at the top of the burner body, which is characterized in that the combustion The outer cover of gas outlet is equipped with mixing drum, has gap, the mixing drum between the mixing drum and the gas outlet pipe Bottom be equipped with a wind inlet, mixed gas outlet is provided at the top of the mixing drum, on the outside of the mixed gas outlet Side is provided with flame stabilization ring, and sparking bar is provided at the inside center of the flame stabilization ring, and the head end of the sparking bar extends downwardly simultaneously Downward through the burner body after penetrating in the gas outlet pipe, it is additionally provided on the burner body and is beaten with described The corresponding ignitor in the end of picker bar.

Further, the outside of the burner body is convexly equipped with connecting plate, and the mixing drum passes through with the connecting plate Screw rod is fixedly connected, and gap is provided between the bottom of the mixing drum and the connecting plate, and a wind inlet is located at institute State gap location.

Further, the First air entrance is provided with premix flow blocking piece, and the premix flow blocking piece is installed in the company On fishplate bar.

Further, the outside of the mixing drum is provided with flow controller, and the flow controller includes sleeve, the flame stabilization ring position Between the sleeve and the flow controller, the top of the flow controller is higher than the bottom of the flame stabilization ring, and steady lower than described The top of flame ring, the bottom of the sleeve are provided with secondary air inlet, and Secondary Air outlet is provided at the top of the sleeve.

Further, the sparking bar is installed with stable flame pan above the gas outlet pipe, the stable flame pan with it is described Gap is provided between gas outlet pipe.

Further, it is described sparking bar be installed with above the mixed gas outlet between the upper and lower every two current stabilization disks, Gap is provided between the current stabilization disk and the mixed gas outlet.

Further, the sparking bar is provided with several stomatas between two current stabilization disks.

Further, detection hole is also provided on the burner body.

Further, open fire detection ultraviolet pipe and flame-observing hole are additionally provided on the burner body.

Further, the head end of the sparking bar is locked on the burner body by locking nut.

The utility model has the beneficial effects that using half premix mode and carrying out accurate regulation and control, combustion gas ensure that First time premixing is first carried out in mixing drum with air, is then carried out again with the Secondary Air outside mixing drum secondary complete Mixing makes more abundant, high combustion efficiency of burning, also has heat shock resistance, low pressure drop, safety without being tempered, be swift in response, You Haiqi Body discharges the advantages such as few；Compared with traditional burner mixed outside high-pressure nozzle, there is combustion even, the thermal efficiency It is high, be particularly suitable for that furnace volume is small and the boiler of bottom fashion air inlet.

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 Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.

Fig. 1 is to face section view for half pre-mixing type combustion apapratus of gas fired-boiler according to the utility model embodiment Figure；

Fig. 2 is the side view according to the utility model embodiment for half pre-mixing type combustion apapratus of gas fired-boiler.

In figure:

1, burner body；2, mixing drum；3, flow controller；4, sparking bar；5, flame stabilization ring；6, stable flame pan；7, screw rod；8, pre- Mixed flow blocking piece；9, detection hole；10, locking nut；11, ignitor；12, open fire detects ultraviolet pipe；13, flame-observing hole；14, current stabilization Disk.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to In the range of the utility model protection.

As shown in Figs. 1-2, a kind of half premix combustion for gas fired-boiler according to the utility model embodiment Device, including hollow burner body 1, (axial direction for bar 4 of striking sparks in Fig. 1 is upper and lower for the lower part of the burner body 1 To) be provided with fuel gas inlet pipe, the top of the burner body 1 is provided with gas outlet pipe, the gas outlet pipe it is outer Portion is arranged with mixing drum 2, has gap between the mixing drum 2 and the gas outlet pipe, the bottom of the mixing drum 2 is equipped with Wind inlet, the top of the mixing drum 2 are provided with mixed gas outlet, and the external top of the mixed gas outlet is provided with steady Flame ring 5, sparking bar 4 is provided at the inside center of the flame stabilization ring 5, and the head end of the sparking bar 4 extends downwardly and penetrates institute Downward through the burner body 1 after stating in gas outlet pipe, it is additionally provided with and the sparking bar on the burner body 1 The corresponding ignitor 11 in 4 end.

In a specific embodiment of the utility model, the outside of the burner body 1 is convexly equipped with connecting plate, described Mixing drum 2 is fixedly connected with the connecting plate by screw rod 7, is provided between the bottom and the connecting plate of the mixing drum 2 Gap, a wind inlet are located at the gap location.

In a specific embodiment of the utility model, the First air entrance is provided with premix flow blocking piece 8, described Premix flow blocking piece 8 is installed on the connecting plate.

In a specific embodiment of the utility model, the outside of the mixing drum 2 is provided with flow controller 3, the section Flowing device 3 includes sleeve, and between the sleeve and the flow controller 3, the top of the flow controller 3 is higher than the flame stabilization ring 5 The bottom of the flame stabilization ring 5, and it is lower than the top of the flame stabilization ring 5, the bottom of the sleeve is provided with secondary air inlet, described Secondary Air outlet is provided at the top of sleeve.

In a specific embodiment of the utility model, the sparking bar 4 is installed with above the gas outlet pipe Stable flame pan 6 is provided with gap between the stable flame pan 6 and the gas outlet pipe.

In a specific embodiment of the utility model, the sparking bar 4 is fixed in the top of the mixed gas outlet Have between the upper and lower every two current stabilization disks 14, be provided with gap between the current stabilization disk 14 and the mixed gas outlet.

In a specific embodiment of the utility model, the sparking bar 4 is arranged between two current stabilization disks 14 There are several stomatas.

In a specific embodiment of the utility model, detection hole 9 is also provided on the burner body 1.

In a specific embodiment of the utility model, it is ultraviolet that open fire detection is additionally provided on the burner body 1 Pipe 12 and flame-observing hole 13.

In a specific embodiment of the utility model, the head end of the sparking bar 4 is locked at by locking nut 10 On the burner body 1.

In order to facilitate the above-mentioned technical proposal for understanding the utility model, below by way of specifically used mode to the utility model Above-mentioned technical proposal be described in detail.

The conventional technical means such as welding can be used, is bolted in the mode described in the utility model that is fixedly connected.

It is used for half pre-mixing type combustion apapratus of gas fired-boiler described in the utility model embodiment, including burner body 1, mixed Close cylinder 2, flow controller 3, sparking bar 4, flame stabilization ring 5, stable flame pan 6, screw rod 7, premix flow blocking piece 8, detection hole 9, locking nut 10, point Thermoelectricity pole 11, open fire detect ultraviolet pipe 12, flame-observing hole 13.Mixing drum 2 is welded into a whole with mounting base, it is solid with screw rod 7 It is scheduled on the connecting plate on burner body 1, the outside of mixing drum 2 is provided with flow controller 3, what flow controller was used to generate blower Secondary Air throttle, and sparking bar 4 is fixedly mounted on burner body 1, and sparking bar 4 sequentially passes through burner body 1, mixes Cylinder 2, flame stabilization ring 5 are closed, premix flow blocking piece 8, premix gear are additionally provided between 2 bottom of mixing drum and the connecting plate of burner body 1 Flow 8 is for being adjusted First air, and the gap between 2 bottom of mixing drum and the connecting plate of burner body 1 is for being passed through The First air that blower generates is equipped with gas electromagnetic valve group on the fuel gas inlet pipe of burner body 1, pacifies on burner body 1 Equipped with ignitor 11, it is fixed with open fire detection ultraviolet pipe 12 on burner body 1, for detecting flame, is opened up on bar 4 of striking sparks There are multiple stomatas.

Spark for lighting combustion gas in burner startup stage is provided by sparking bar 4.The head end connection of sparking bar 4 Electric input lead, electric input lead are configured to receive a voltage, and voltage can be as the voltage provided at electric input lead Or it is propagated using the state amplified along sparking bar 4, and make the end for being in high-voltage state and be in low-voltage state The spark or electric arc generated between cathode (i.e. ignitor 11).

Blower uses 4 grades of high-speed fans.3 material of flow controller is H62.1 material of burner body is ZL102.2 material of mixing drum Matter is 1Cr13.

Fuel gas inlet pipe is Imported gas, uses flanged joint to combustion gas inlet pipe.

Flow controller 3 and flame stabilization ring 5 are weldingly fixed on mixing drum 2, are welded with stable flame pan 6 and two current stabilizations on bar 4 of striking sparks Disk 14, installation is to the fixed locking of locking nut 10, being provided with the sight fire of observation flame on burner body 1 on burner body 1 Hole 13 is equipped with four pieces of premix flow blocking pieces 8 between the connecting plate of burner body 1 and the bottom of mixing drum 2.

When specifically used, combustion gas is entered by the fuel gas inlet pipe of burner body 1, passes through stable flame pan 6 and burner sheet Gap discharge between the gas outlet pipe of body 1, the First air that blower generates pass through 2 bottom of mixing drum and burner body 1 Gap between connecting plate enters in mixing drum 2, carries out first time premixing with the combustion gas entered in mixing drum 2, then Gaseous mixture is reached at igniting by mixed gas outlet, contact lighting with the pilot spark of sparking bar 4, while flame generates It is mixed with the Secondary Air for flowing through flow controller 3, is burnt after so that combustion gas and air is completely mixed again, flame-shaped Shape is cardioid, and flame is shorter, and entire combustion zone is a short and small oval heart shaped, and volume can 30% left side small compared with conventional burners The right side is Industrial Boiler small hearth tubercle about size.

Half pre-mixing type combustion apapratus of gas fired-boiler is used for described in the utility model embodiment, by combustion gas and sky before burning Gas (i.e. First air) first carries out half and is pre-mixed, then is sufficiently mixed with Secondary Air, and combustion reaction is more complete, and this structure is excellent In smaller in other traditional structures, size, the small hearth for being more suitable for limiting by shape is used, and it burn after flue gas CO concentration is almost 0；For excess air coefficient down to 1.1, flue gas loss is smaller than conventional burners, than the standard of country's discharge It is much lower.

For half pre-mixing type combustion apapratus of gas fired-boiler since flame mixing is complete described in the utility model embodiment, hair It is hot uniform, prevent the thermal extremes of combustion chamber substantially, therefore, the discharge of nitrogen oxides is very low, is very environmentally friendly combustion system.

Described in the utility model embodiment for gas fired-boiler half pre-mixing type combustion apapratus by fuel and air into Row half is pre-mixed, and carries out accurate regulation and control, be ensure that being thoroughly mixed for combustion gas and air, is made more abundant, institute of burning There is high combustion efficiency with burner, compared with the structure that traditional combustor external mixes, there is combustion even, the thermal efficiency High, pernicious gas discharges less, can reduce the features such as boiler furnace volume.

The burner can be applicable to hot-water boiler, steam boiler, material defrosting, roasting plant, ship, oil field, school, work Mine enterprise etc. needs the place of thermal energy.

In conclusion using half premix mode and carrying out accurate tune by means of the above-mentioned technical proposal of the utility model Section and control ensure that combustion gas and air first carry out first time premixing in mixing drum, then again with two outside mixing drum Secondary wind progress is secondary to be thoroughly mixed, and makes more abundant, high combustion efficiency of burning, also has heat shock resistance, low pressure drop, safe nothing It is tempered, is swift in response, pernicious gas discharges the advantages such as few；Compared with traditional burner mixed outside high-pressure nozzle Compared with combustion even, the thermal efficiency is high, small and bottom fashion air inlet the boiler that is particularly suitable for furnace volume.

The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (10)

1. a kind of half pre-mixing type combustion apapratus for gas fired-boiler, including hollow burner body (1), the burner body (1) lower part is provided with fuel gas inlet pipe, is provided with gas outlet pipe at the top of the burner body (1), which is characterized in that The outer cover of the gas outlet pipe is equipped with mixing drum (2), has sky between the mixing drum (2) and the gas outlet pipe Gap, the bottom of the mixing drum (2) is equipped with a wind inlet, is provided with mixed gas outlet at the top of the mixing drum (2), described The external top of mixed gas outlet is provided with flame stabilization ring (5), and sparking bar (4) is provided at the inside center of the flame stabilization ring (5), The head end of sparking bar (4) extend downwardly and penetrate in the gas outlet pipe after downward through the burner body (1), Ignitor (11) corresponding with the sparking end of bar (4) is additionally provided on the burner body (1).

2. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the burner sheet The outside of body (1) is convexly equipped with connecting plate, and the mixing drum (2) is fixedly connected with the connecting plate by screw rod (7), the mixing It is provided with gap between the bottom and the connecting plate of cylinder (2), a wind inlet is located at the gap location.

3. half pre-mixing type combustion apapratus according to claim 2 for gas fired-boiler, which is characterized in that the First air into Premix flow blocking piece (8) is provided at mouthful, the premix flow blocking piece (8) is installed on the connecting plate.

4. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the mixing drum (2) outside is provided with flow controller (3), and the flow controller (3) includes sleeve, and the flame stabilization ring (5) is located at the sleeve and institute It states between flow controller (3), the top of the flow controller (3) is higher than the bottom of the flame stabilization ring (5), and is lower than the flame stabilization ring (5) top, the bottom of the sleeve are provided with secondary air inlet, and Secondary Air outlet is provided at the top of the sleeve.

5. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the sparking bar (4) it is installed with above the gas outlet pipe stable flame pan (6), is arranged between the stable flame pan (6) and the gas outlet pipe There is gap.

6. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the sparking bar (4) be installed with above the mixed gas outlet between the upper and lower every two current stabilization disks (14), the current stabilization disk (14) with it is described Gap is provided between mixed gas outlet.

7. half pre-mixing type combustion apapratus according to claim 6 for gas fired-boiler, which is characterized in that the sparking bar (4) several stomatas are provided between two current stabilization disks (14).

8. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the burner sheet Detection hole (9) are also provided on body (1).

9. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the burner sheet Open fire detection ultraviolet pipe (12) and flame-observing hole (13) are additionally provided on body (1).

10. half pre-mixing type combustion apapratus according to claim 1 for gas fired-boiler, which is characterized in that the sparking bar (4) head end is locked on the burner body (1) by locking nut (10).