CN209263021U - A kind of double feed inlet formula low NOx burners and combustion apparatus - Google Patents
A kind of double feed inlet formula low NOx burners and combustion apparatus Download PDFInfo
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- CN209263021U CN209263021U CN201822111754.0U CN201822111754U CN209263021U CN 209263021 U CN209263021 U CN 209263021U CN 201822111754 U CN201822111754 U CN 201822111754U CN 209263021 U CN209263021 U CN 209263021U
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 209
- 239000000446 fuel Substances 0.000 claims abstract description 177
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- 239000000463 material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 11
- 239000007921 spray Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
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Abstract
The utility model discloses a kind of double feed inlet formula low NOx burners and combustion apparatus, burner includes combustion chamber, high-temperature fuel import, low temp fuel import and combustion air inlet, the high-temperature fuel import passes through high-temperature fuel pipeline and burner outlet, low temp fuel import is communicated by low temp fuel channel with combustion chamber, combustion air inlet is communicated with combustion chamber, combustion air inlet is connected to burner outlet by combustion air channel, is equipped with igniter in combustion chamber.Combustion process is divided into two stages of high temperature and low temperature, fuel is allowed to be passed through burner from different location, and combustion air and fuel is allowed to be mixed and burned in different location.Not only it can guarantee full combustion of fuel, but also can control cold stage CO discharge amount and hot stage NOx discharge, realize energy-saving and emission-reduction.
Description
Technical field
The utility model relates to the energy conservation and environmental protections of combustion apparatus, and in particular to a kind of double feed inlet formula low NOx burners
And combustion apparatus.
Background technique
Currently, with the propulsion that national energy conservation and emission reduction requires, for High-temp. kiln fuel combustion, from performance of enterprises angle,
It is required that fuel is sufficiently saved in burning as far as possible, the operating cost of stove is reduced；From national requirements for environmental protection angle, and require to reduce pollution
Object discharge reduces harm of the stove discharge exhaust gas to environment.In order to allow High-temp. kiln to save fuel, common practice is logical at present
It crosses stove exhaust gas and carrys out warm-up combustion-supporting air, with the development of heat exchanger technology, the combustion air temperature of High-temp. kiln is more next at present
Higher, some even alreadys exceed 600 DEG C, and combustion air temperature is higher, and the NOx for formation of burning is necessarily higher.In order in high temperature
The discharge amount of NOx is controlled under the conditions of combustion air, combustion apparatus producer generallys use enforced classification combustion system, that is, allow part or
Whole combustion airs and fuel are remixed and are burnt in burner hearth.Facts proved that enforced classification burning is in high temperature combustion air
Under the conditions of make combustion apparatus reduce NOx emission the best approach.However, this higher burner hearth temperature of enforced classification combustion requirements
Degree, usually requires that fire box temperature at 800 DEG C or more, to guarantee after fuel mix in burner hearth with combustion air energy completely burned,
Otherwise it is easy for leading to incomplete combustion and forming CO.For any High-temp. kiln, cold stage when all having certain is right
Annealing furnace in continuous high temperature stove, such as acid-washing stainless steel annealed wire there is in stove starting temperature-rise period from ring
Border temperature is to 800 DEG C of cold stage；And for periodic High-temp. kiln, such as car-type or sealed box type quenching furnace, normalizing furnace etc.,
Substantially each period, there are cold stages.Traditional burner is that whole combustion airs are mixed and lighted in burner with fuel,
Burner hearth is sprayed into again after formation flame to be heated.In the cold stage of High-temp. kiln operation, if using enforced classification burning
Low NOx burner discharges exceeded problem with regard to that must will appear CO.In order to solve the upper of general high temperature low emission stove appearance at present
State problem, there is an urgent need to design it is a kind of not only can control cold stage CO discharge, but also can be reduced the burning of hot stage NOx emission and set
It is standby.
Utility model content
The purpose of this utility model is to provide a kind of double feed inlet formula low NOx burners and combustion apparatus, both can be reduced low
Thermophase CO discharge, and hot stage NOx emission can be reduced.
In order to solve the above technical problems, the utility model uses following scheme:
A kind of double feed inlet formula low NOx burners, including combustion chamber, high-temperature fuel import, low temp fuel import and combustion-supporting
Air intlet, the high-temperature fuel import pass through low temperature by high-temperature fuel pipeline and burner outlet, low temp fuel import
Fuel channel is communicated with combustion chamber, and combustion air inlet is communicated with combustion chamber, and combustion air inlet is connected by combustion air channel
Burner outlet is passed to, is equipped with igniter in combustion chamber.
As stated in the background art, for the discharge amount of control NOx under the conditions of high temperature combustion air, pressure point is generallyd use
Grade combustion system, that is, allow part or all of combustion air and fuel to remix and burn in burner hearth.Enforced classification burning be
Reduce combustion apparatus by the best approach of NOx emission, however, all depositing for any High-temp. kiln
Cold stage when certain.In the cold stage of High-temp. kiln operation, if burnt using the low NOx of enforced classification burning
Mouth discharges exceeded problem with regard to that must will appear CO.Traditional burner is to mix whole combustion airs simultaneously in burner with fuel
It lights, sprays into burner hearth again after formation flame and heated.
Using double feed inlet formula low NOx burners described in the utility model, according to burner hearth actual temperature, switch in due course fuel into
Mouthful position, is divided into hot stage and cold stage for combustion process, allows fuel and combustion air by changing fuel inlet position
Mix combining combustion in different location, it is ensured that fuel under high temperature and low temperature can full combustion, while reduce CO and NOx row
High-volume.
When fire box temperature is lower, fuel is allowed to enter burner from low temp fuel import, combustion air is from combustion air inlet
Into burner, low temp fuel and combustion air mix in the combustion chamber of burner, and the indoor igniter of starting burning forms fire
Enter hearth combustion after flame.In this state, the burner working principle is as common common high combustion rate burner at present, can be with
Realize ignition function.And since fuel combustion release heat increases temperature in burner, the flame of burner outlet sprays
Speed is higher.The heating process under low temperature transition based on convective heat transfer is realized in burner hearth, CO concentration is lower, simultaneously because furnace at this time
Bore temperature is lower, and combustion air preheating temperature is also corresponding lower, so NOx emission is also very low.
When fire box temperature is higher, fuel is allowed to enter burner from high-temperature fuel import, high-temperature fuel passes through the height in burner
Warm fuel channel directly exports from burner and sprays into burner hearth, and combustion air enters from combustion air inlet and enters furnace through burner outlet
Thorax, high-temperature fuel and combustion air carry out Pintsch process in burner hearth and discharge heat.In this state, carry out in burner hearth with
Being evenly heated based on radiation, in the hot operation stage, which does not need ignition function, and fuel is injected directly into combustion air
Then burner hearth carries out slowly diffusion mixing and Pintsch process in burner hearth, effectively prevents the appearance for concentrating high temperature dot, thus
Realize low NOx drainage.Simultaneously as fire box temperature is higher, as long as the combustible component in burner hearth is non-with the presence of oxygen in burner hearth
It is often easy to be implemented in combination with completely burned with oxygen, so probability very little existing for CO, can be ignored.
As a preferred embodiment of the above solution, in order to keep nozzle structure more simple and compact, burner body is socketed on high-temperature fuel pipe
Outside road, with high-temperature fuel pipeline close to the gap that low temp fuel inlet end is constituted be low temp fuel channel, with high-temperature fuel pipe
Road is combustion chamber far from the cavity that low temp fuel is constituted into one end；Burner shell is socketed on outside burner body, with burner body it
Between the gap that constitutes be combustion air channel, burner shell is equipped with combustion air inlet.
Further, burner shell is divided into the first shell of burner, burner second housing, and combustion air inlet is located at burner
On one shell, the outlet of high-temperature fuel pipeline and the export mixes burner outlet of burner second housing.
The first shell of burner is structure as a whole with burner body, and burner second housing and the first shell of burner pass through bolt etc.
Fixing piece connection, high-temperature fuel import and high-temperature fuel entrance are connected by flange, and the fixing end of burner body passes through spiral shell
Bolt is fixedly mounted.Using the cramped construction of socket, each cavity is efficiently used as fuel or combustion air channel, guarantees fluid stream
Reduce burner volume, manufacture easy to produce and installation and replacement while clear and coherent smooth.
The section circular diameter in low temp fuel channel is less than the section circular diameter of combustion chamber as a preferred embodiment of the above solution,
The outer wall of combustion chamber is equipped with several combustion air air inlets.Combustion chamber is rapidly entered convenient for low temp fuel and combustion air, in addition,
The combustion chamber volume the big more is conducive to fast mixing combustion.
As a preferred embodiment of the above solution, in order to detect the flame status in burner, fire defector dress is additionally provided in burner
It sets.In cold stage, which may be implemented ignition function and fire as common high combustion rate burner common at present
Flame detection function.After forming stable flame in burner, burner has apparent flame contours, the fire of burner outlet inside burner hearth
Flame spouting velocity is higher.
Further, igniter uses high pressure spot lighted torch, and flame detecting device uses ion bar.
As a preferred embodiment of the above solution, for the ease of the entrance location of automation control fuel, the high-temperature fuel of burner into
Mouth, low temp fuel import pass through fuel gas pipeline respectively and are connected to fuel air general pipeline, and fuel gas pipeline, which is equipped with, automatically controls valve member.
Fuel entrance and burning position can be accurately controlled real-time, quickly by automation control, to more effectively guarantee sufficiently combustion
It burns and reduces waste emission amount.
A kind of combustion apparatus, using double feed inlet formula low NOx burners described in the utility model, burner and combustion apparatus
Burner hearth connection.The combustion apparatus is provided with burning due to using double feed inlet formula low NOx burners described in the utility model
Beneficial effect possessed by mouth.
Cold stage for any High-temp. kiln, when all having certain.In the cold stage of High-temp. kiln operation, such as
Fruit uses existing low NOx burner combustion apparatus, it may appear that CO discharges exceeded problem.The combustion apparatus uses the utility model
Double feed inlet formula low NOx burners, switch fuel inlet position by the burner, and allow fuel in different positions in real time
Set mixing, guarantee fuel high temperature and cold stage can full combustion, and not only can be reduced cold stage CO discharge, but also can drop
Low hot stage NOx emission.
The combustion apparatus is additionally provided with control unit as a preferred embodiment of the above solution, with the autocontrol valve on fuel gas pipeline
Part electrical connection, to automatically control the Inlet Position and flow of fuel.It can accurately be controlled real-time, quickly by automation control
Fuel processed enters and burning position, to more effectively guarantee full combustion and reduce waste emission amount.
Further, in order to detect the actual temperature in burner hearth, temperature sensor is equipped in the burner hearth of combustion apparatus, and
And temperature sensor is electrically connected with the control unit of combustion apparatus.Can be monitored in real time temperature in burner hearth, so adjust fuel into
Mouth position.
A kind of fuel air control method, using combustion apparatus described in the utility model, determine a difference high temperature with
The desired temperature of cold stage controls fuel from low temp fuel import and enters burning when fire box temperature is lower than desired temperature
Mouth, combustion air enter burner from combustion air inlet, and fuel is mixed in the combustion chamber with combustion air, lighted after forming flame
Into burner hearth full combustion；When fire box temperature is higher than desired temperature, fuel is controlled from high-temperature fuel import and enters burner, directly
It connects to export from burner and sprays into burner hearth, combustion air enters burner hearth through burner from combustion air inlet, and fuel and combustion air are in furnace
It is mixed in thorax and carries out Pintsch process.
The fuel air technique that existing combustion apparatus uses is that whole combustion airs is allowed to mix simultaneously in burner with fuel
It lights, sprays into burner hearth again after formation flame and heated.Fuel air control method described in the utility model divides combustion process
For two stages of high temperature and low temperature, fuel is controlled from different location and is passed through burner, and allow combustion air from fuel in different positions
Set mixing.It can guarantee full combustion of fuel save the cost, and can be reduced cold stage CO discharge and hot stage NOx row
It puts.
In the control unit of combustion apparatus, one temperature value, boundary of the value as burner hearth high temperature and burner hearth low temperature are set
Value.When fire box temperature is lower than setting value, controls fuel and from low temp fuel import enter burner, in burner combustion room with it is combustion-supporting
Air mix and light to form flame after enter hearth combustion.In this state, the combustion apparatus working principle and at present often
The common high combustion rate burner seen is the same, and igniting and functions of flame detection, each burner may be implemented apparent fire inside burner hearth
Flame profile, and the flame spouting velocity of burner outlet is higher.The heating under low temperature transition based on convective heat transfer is realized in burner hearth
Process, CO concentration is lower, simultaneously because fire box temperature is lower at this time, combustion air preheating temperature is also corresponding lower, so NOx is arranged
It puts also very low.
When fire box temperature is higher than setting value, fuel is controlled from high-temperature fuel import and enters burner, fuel is directly from burner
Exit sprays into burner hearth, is slowly mixed together with the combustion air for entering burner hearth from combustion-supporting wind inlet, Pintsch process is carried out in burner hearth
And release heat.In this state, being evenly heated based on radiating, in the hot operation stage, burner are carried out in burner hearth
It does not need igniting and functions of flame detection, flame contours of the burner in burner hearth is no longer clear.Fuel is directly sprayed with combustion air
Enter burner hearth, slowly diffusion mixing and Pintsch process are then carried out in burner hearth, effectively prevents the appearance for concentrating high temperature dot, from
And realize low NOx drainage.Simultaneously as fire box temperature is higher, as long as the combustible component with the presence of oxygen in burner hearth, in burner hearth
It is very easy to be implemented in combination with completely burned with oxygen, so probability very little existing for CO, can be ignored.
The utility model has the advantages that
1) the utility model is easy to operate, only just solves existing combustion apparatus all by the feed inlet setting for changing burner
Existing cold stage CO discharges excessive problem, and remains the advantages of enforced classification burning reduces NOx emission.
2) the utility model is fired in the different temperatures stage of combustion process, real-time control fuel inlet position by control
Material realizes low CO of full operation phase, low NOx drainage with the hybrid position of combustion air, both can control cold stage CO and has discharged,
It can be reduced hot stage NOx emission again.
3) the utility model realizes more function of common high combustion rate burner and enforced classification burning burner on the same burner
It can combine.In cold stage, igniting and fire is may be implemented as common high combustion rate burner working principle and function in the utility model
Flame detection function；In hot stage, enforced classification burning is may be implemented in the utility model, guarantees full combustion of fuel.
4) the utility model is simple and practical in structure, using the cramped construction of socket, efficiently use each cavity as fuel or
Combustion air channel guarantees to reduce burner volume, manufacture easy to produce and installation and replacement while fluid flows smoothly.
Detailed description of the invention
Fig. 1 is the surface structure schematic diagram of the utility model.
Appended drawing reference: the combustion chamber 1-, 2- high-temperature fuel import, 3- low temp fuel import, 4- combustion air inlet, 5- high temperature
Fuel channel, the outlet of 6- burner, 7- low temp fuel channel, 8- combustion air channel, 9- burner body, 10- burner first shell,
11- burner second shell, 12- ion bar.
Specific embodiment
Below with reference to examples and drawings, the utility model is described in further detail, but the reality of the utility model
It is without being limited thereto to apply mode.
Embodiment 1:
As shown in Figure 1, a kind of double feed inlet formula low NOx burners of the present embodiment, including combustion chamber 1, high-temperature fuel import
2, low temp fuel import 3 and combustion air inlet 4, the high-temperature fuel import 2 are exported by high-temperature fuel pipeline 5 and burner
6 connections, low temp fuel import 3 are communicated by low temp fuel channel 7 with combustion chamber 1, and combustion air inlet 4 is communicated with combustion chamber 1,
Combustion air inlet 4 is connected to burner outlet 6 by combustion air channel 8, is equipped with igniter in combustion chamber 1.
The principle of the present embodiment are as follows:
When fire box temperature is lower, fuel is allowed to enter burner from low temp fuel import 3, combustion air is from combustion air inlet
4 enter burner, low temp fuel and combustion air mixes in the combustion chamber of burner 1, and the indoor igniter of starting burning is formed
Enter hearth combustion after flame.In this state, which, can as common high combustion rate burner common at present
To realize ignition function.And since fuel combustion release heat increases temperature in burner, the flame spray of burner outlet
Speed is higher out.The heating process under low temperature transition based on convective heat transfer is realized in burner hearth, CO concentration is lower, simultaneously because at this time
Fire box temperature is lower, and combustion air preheating temperature is also corresponding lower, so NOx emission is also very low.
When fire box temperature is higher, fuel is allowed to enter burner from high-temperature fuel import 2, high-temperature fuel passes through the height in burner
Warm fuel channel 5 directly from burner outlet 6 spray into burner hearths, combustion air from combustion air inlet 4 enter and through burner export into
Enter burner hearth, high-temperature fuel and combustion air carry out Pintsch process in burner hearth and discharge heat.In this state, in burner hearth into
Row being evenly heated based on radiating, in the hot operation stage, which does not need ignition function, and fuel is direct with combustion air
Burner hearth is sprayed into, slowly diffusion mixing and Pintsch process are then carried out in burner hearth, effectively prevents the appearance for concentrating high temperature dot,
To realize low NOx drainage.Simultaneously as fire box temperature is higher, as long as the combustible component with the presence of oxygen in burner hearth, in burner hearth
It is just very easy to be implemented in combination with completely burned with oxygen, so probability very little existing for CO, can be ignored.
The present embodiment switches fuel inlet position in due course, combustion process is divided into hot stage according to burner hearth actual temperature
And cold stage, allow fuel and combustion air in different location mixed firinor fuel burning by changing fuel inlet position.It can guarantee to fire
Material under high temperature and low temperature can full combustion, while reducing CO and NOx discharge.Not only it can be reduced cold stage CO discharge, but also
Hot stage NOx emission can be reduced.
As the preferred embodiment of embodiment 1, in order to keep nozzle structure more simple and compact, burner body 9 is socketed on high temperature
Outside fuel channel 5, the gap constituted with high-temperature fuel pipeline 5 close to 3 one end of low temp fuel import is low temp fuel channel 7, with
High-temperature fuel pipeline 5 is combustion chamber 1 far from the cavity that 3 one end of low temp fuel import is constituted, and burner shell is socketed on burner body 9
Outside, the gap constituted between burner body 9 is combustion air channel 8, and burner shell is equipped with combustion air inlet 4.
Further, burner shell is divided into the first shell of burner 10, burner second housing 11, and combustion air inlet 4 is located at
On the first shell of burner 10, the outlet of high-temperature fuel pipeline 5 and the export mixes burner outlet 6 of burner second housing 11.
The first shell of burner 10 is structure as a whole with burner body 9, and burner second housing 11 and the first shell of burner 10 are logical
The connection of the fixing pieces such as bolt is crossed, high-temperature fuel import 2 and the entrance of high-temperature fuel pipeline 5 are connected by flange, burner body 9
Fixing end is bolted installation.Using the cramped construction of socket, it is logical as fuel or combustion air to efficiently use each cavity
Road guarantees to reduce burner volume, manufacture easy to produce and installation and replacement while fluid flows smoothly.
Preferably, the section circular diameter in low temp fuel channel 7 is less than the section circular diameter of combustion chamber 1, in the outer of combustion chamber 1
Wall is equipped with several combustion air air inlets.Combustion chamber is rapidly entered convenient for low temp fuel and combustion air, in addition, 1 body of combustion chamber
The product the big more is conducive to combustion air and low temp fuel fast mixing combustion.
Embodiment 2:
The present embodiment on the basis of embodiment 1, has additional flame detecting device in burner, for detecting in burner
Flame status specifically uses ion bar.Further, the igniter being arranged in combustion chamber 1 uses high pressure spot lighted torch.Work as burner hearth
When temperature is lower, fuel is allowed to enter burner from low temp fuel import 3, combustion air enters burner, low temperature from combustion air inlet 4
Fuel and combustion air mix in the combustion chamber of burner 1, start high pressure spot lighted torch, detect that stable flame is laggard to ion bar
Enter burner hearth full combustion.
In cold stage, which may be implemented igniting function as common high combustion rate burner common at present
Energy and functions of flame detection.After forming stable flame in burner, burner has apparent flame contours inside burner hearth, and burner goes out
The flame spouting velocity of mouth is higher.
Embodiment 3:
The present embodiment increases automatic control valve member on the basis of embodiment 1 and embodiment 2.The high-temperature fuel of burner
Import 2, low temp fuel import 3, combustion-supporting wind inlet 4 are connected to by fuel gas pipeline with fuel air general pipeline respectively, on fuel gas pipeline
Equipped with automatic control valve member.
In hot stage, control unit opens the valve member that the valve member on high-temperature fuel gas pipeline closes low temperature fuel gas pipeline mountain,
It controls fuel and enters burner from high-temperature fuel import 2；Conversely, then closing the valve member on high-temperature fuel gas pipeline in cold stage, beat
The valve member on low temperature fuel gas pipeline is opened, control fuel enters burner from low temp fuel import 3.Pass through automatic control and adjustment fuel gas conduit
The automatic control valve member of road can accurately control fuel entrance and burning position, to more effectively guarantee real-time, quickly
Full combustion simultaneously reduces waste emission amount.
Embodiment 4:
A kind of combustion apparatus, using double feed inlet formula low NOx burners described in the utility model, burner and combustion apparatus
Burner hearth connection.
When fire box temperature is lower, fuel is allowed to enter burner from low temp fuel import 3, combustion air is from combustion air inlet
4 enter burner, low temp fuel and combustion air mixes in the combustion chamber of burner 1, lights and enters burner hearth after forming stable flame
Burning.In this state, the combustion apparatus working principle is as common common high combustion rate burner combustion apparatus at present, can be with
Realize igniting and functions of flame detection, each burner has apparent flame contours, and the flame of burner outlet inside burner hearth
Spouting velocity is higher.The heating process under low temperature transition based on convective heat transfer is realized in burner hearth, CO concentration is lower, simultaneously because this
When fire box temperature it is lower, combustion air preheating temperature is also corresponding lower, so NOx emission is also very low.
When fire box temperature is higher, fuel is allowed to enter burner from high-temperature fuel import 2, high-temperature fuel passes through the height in burner
Warm fuel channel 5 directly sprays into burner hearth from burner outlet 6, and combustion air enters from combustion air inlet 4 to be exported directly through burner
Into burner hearth, high-temperature fuel and combustion air are diffused mixing and Pintsch process in burner hearth.In this state, burner is not
Igniting and functions of flame detection are needed, flame contours of the burner in burner hearth are no longer clear, carry out based on radiating in burner hearth
It is evenly heated.Fuel and combustion air are injected directly into burner hearth, and slowly diffusion mixing and Pintsch process are then carried out in burner hearth,
The appearance for effectively preventing concentrating high temperature dot, to realize low NOx drainage.Simultaneously as fire box temperature is higher, as long as in burner hearth
With the presence of oxygen, the combustible component in burner hearth is just very easy to be implemented in combination with completely burned with oxygen, so probability existing for CO
Very little can be ignored.
Embodiment 5:
For the present embodiment on the basis of embodiment 4, which is additionally provided with control unit, with fuel gas pipeline each on burner
Automatic control valve member electrical connection, to automatically control the Inlet Position and flow of fuel.It is set in the control unit of combustion apparatus
Set a desired temperature, cut off value of the value as burner hearth hot stage and cold stage.When fire box temperature is set lower than temperature
When definite value, control unit opens the control valve member on low temp fuel pipeline, closes the control valve member on high-temperature fuel pipeline, allows combustion
Material enters from low temp fuel import 3.When fire box temperature is higher than desired temperature, control unit is closed on low temp fuel pipeline
Valve member is controlled, the control valve member on high-temperature fuel pipeline is opened, fuel is allowed to enter from high-temperature fuel import 2.
Fuel inlet position can be accurately controlled real-time, quickly by automation control, to more effectively guarantee abundant
It burns and reduces waste emission amount, realize energy-saving and emission-reduction.
Embodiment 6:
On the basis of embodiment 4 and embodiment 5, in order to accurately detect the actual temperature in burner hearth in real time, set in burning
Temperature sensor is equipped in standby burner hearth, and temperature sensor is electrically connected with the control unit of combustion apparatus.It can supervise in real time
Temperature in burner hearth is surveyed, and then adjusts fuel inlet position.
The fire box temperature that temperature sensor will test passes control unit back in real time, by comparing burner hearth actual temperature and temperature
The size for spending setting value can determine that burning is in hot stage or cold stage, and then determine the entrance location of fuel.
Embodiment 7:
A kind of fuel air control method, using combustion apparatus described in the utility model, determine a difference high temperature with
The desired temperature of cold stage allows fuel to enter from low temp fuel import 3 and burns when fire box temperature is lower than desired temperature
Mouth, combustion air enter burner from combustion air inlet 4, and fuel mixes in combustion chamber 1 with combustion air, lights to form flame
Enter burner hearth full combustion afterwards；When fire box temperature is higher than desired temperature, fuel is allowed to enter burner from high-temperature fuel import 2,
Burner hearth directly is sprayed into from burner outlet 6, combustion air enters burner hearth, fuel and combustion air through burner from combustion air inlet 4
It is mixed in burner hearth and carries out Pintsch process.
Combustion process is divided into two stages of high temperature and low temperature by fuel air control method described in the present embodiment, allow fuel from
Different location is passed through burner, and combustion air is allowed to mix with fuel in different location.It can guarantee full combustion of fuel saving
Cost, and can be reduced cold stage CO discharge and hot stage NOx emission.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, above embodiments are made within the spirit and principles of the present invention according to the technical essence of the utility model
Any simple modifications, equivalent substitutions and improvements etc., within the protection scope for still falling within technical solutions of the utility model.
Claims (10)
1. a kind of double feed inlet formula low NOx burners, which is characterized in that including combustion chamber (1), high-temperature fuel import (2), low temperature combustion
Expect import (3) and combustion air inlet (4), the high-temperature fuel import (2) is exported by high-temperature fuel pipeline (5) and burner
(6) it is connected to, low temp fuel import (3) is communicated by low temp fuel channel (7) with combustion chamber (1), combustion air inlet (4) and combustion
It burns room (1) to communicate, combustion air inlet (4) is connected to burner outlet (6) by combustion air channel (8), sets in combustion chamber (1)
There is igniter.
2. double feed inlet formula low NOx burners according to claim 1, which is characterized in that further include burner body (9), burn
Mouth shell, burner body (9) are socketed on high-temperature fuel pipeline (5) outside, with high-temperature fuel pipeline (5) close to low temp fuel import
(3) gap that one end is constituted is low temp fuel channel (7), with high-temperature fuel pipeline (5) far from low temp fuel import (3) one end structure
At cavity be combustion chamber (1)；Burner shell is socketed on burner body (9) outside, and the gap constituted between burner body (9) is
Combustion air channel (8), burner shell are equipped with combustion air inlet (4).
3. double feed inlet formula low NOx burners according to claim 2, which is characterized in that the burner shell is divided into burner
First shell (10), burner second housing (11), combustion air inlet (4) are located on the first shell of burner (10), high-temperature fuel
The outlet of pipeline (5) and the export mixes burner of burner second housing (11) export (6).
4. double feed inlet formula low NOx burners according to claim 2, which is characterized in that the section of low temp fuel channel (7)
Circular diameter is less than the section circular diameter of combustion chamber (1), and the outer wall in combustion chamber (1) is equipped with several combustion air air inlets.
5. double feed inlet formula low NOx burners according to any one of claims 1 to 4, which is characterized in that be additionally provided in burner
Flame detecting device.
6. double feed inlet formula low NOx burners according to claim 1, which is characterized in that the igniter is high pressure spot
Lighted torch.
7. double feed inlet formula low NOx burners according to claim 1, which is characterized in that the high-temperature fuel import (2),
Low temp fuel import (3) is connected to by fuel gas pipeline with fuel air general pipeline respectively, and fuel gas pipeline, which is equipped with, automatically controls valve member.
8. a kind of combustion apparatus, which is characterized in that burnt including the low NOx of the described in any item double feed inlet formulas of claim 1~7
Mouth, burner outlet are connected to the burner hearth of combustion apparatus.
9. combustion apparatus according to claim 8, which is characterized in that the combustion apparatus be equipped with control unit, with it is double into
The automatic control valve member of material mouth formula low NOx burner is electrically connected.
10. combustion apparatus according to claim 8, which is characterized in that be equipped with temperature sensor in the burner hearth, temperature passes
Sensor is electrically connected with the control unit of combustion apparatus.
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| CN201822111754.0U CN209263021U (en) | 2018-12-17 | 2018-12-17 | A kind of double feed inlet formula low NOx burners and combustion apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256115A (en) * | 2020-03-25 | 2020-06-09 | 四川铭能科技开发有限公司 | Ultralow nitrogen burner |
| CN111457370A (en) * | 2020-05-06 | 2020-07-28 | 北京京诚凤凰工业炉工程技术有限公司 | gas burner |
-
2018
- 2018-12-17 CN CN201822111754.0U patent/CN209263021U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256115A (en) * | 2020-03-25 | 2020-06-09 | 四川铭能科技开发有限公司 | Ultralow nitrogen burner |
| CN111457370A (en) * | 2020-05-06 | 2020-07-28 | 北京京诚凤凰工业炉工程技术有限公司 | gas burner |
| CN111457370B (en) * | 2020-05-06 | 2025-03-04 | 北京京诚凤凰工业炉工程技术有限公司 | Gas Burner |
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