CN110285418A - A kind of high efficency low NOx compact self preheating burner - Google Patents
A kind of high efficency low NOx compact self preheating burner Download PDFInfo
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- CN110285418A CN110285418A CN201910684866.1A CN201910684866A CN110285418A CN 110285418 A CN110285418 A CN 110285418A CN 201910684866 A CN201910684866 A CN 201910684866A CN 110285418 A CN110285418 A CN 110285418A
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- heat exchanger
- compact
- heat
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims abstract description 41
- 239000002737 fuel gas Substances 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 37
- 239000003546 flue gas Substances 0.000 claims description 37
- 239000000567 combustion gas Substances 0.000 claims description 24
- 239000003517 fume Substances 0.000 claims description 20
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000338 in vitro Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003595 mist Substances 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000779 smoke Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention discloses a kind of high efficency low NOx compact self preheating burner, it being capable of more fully Mist heat recovering, preheated air temperature is improved to the maximum extent, reduces exhaust gas temperature, the heat exchange efficiency of burner is promoted to 80% or more, is greatlyd improve from the energy-saving horizontal for preheating burner；The burner uses flameless combustion technology in low temperature simultaneously when double using air fuel gas grading combustion technologies, high temperature, most optimally solve the problems, such as burner in entire combustion process due to air preheating temperature increase after flame combustion temperature raising cause NOx emission to rise, energy conservation and environmental protection.
Description
Technical field
The present invention relates to self preheating burner field, espespecially a kind of high efficency low NOx compact self preheating burner.
Background technique
Energy and environment always are the contradiction topic of world industry development.China is that resource is more deficient in the world
One of country, the basic material shortage of industrial development, should blue montains and green waters, also want Kingsoft Yin Shan to become China's industrial ecology from now on
Development of civilization construction new concept, therefore how more efficiently utilize the existing energy, and meet country environmental protection standard at
For the new trend of industrial development.
Self preheating burner is a kind of typical industrial furnace burner, and burner both serves as burner, also functions as smoke evacuation
Device, and at the same time carrying out, but the combustion system of conventional self preheating burner is single, heat exchange efficiency is lower always；It passes simultaneously
For structure of uniting when for there is the conventional combustion modes of air preheat, the fluff pulps such as NOx are larger, it is difficult to meet environmental protection mark
It is quasi-.
Summary of the invention
To solve the above problems, the present invention provides a kind of high efficency low NOx compact self preheating burner, can more fill
The Mist heat recovering divided improves preheated air temperature to the maximum extent, reduces exhaust gas temperature, the heat exchange efficiency of burner is promoted
To 80% or more, greatly improve from the energy-saving horizontal for preheating burner；The burner uses air fuel gas classification combustion in low temperature simultaneously
Flameless combustion technology is used when burning technology, high temperature, most optimally solves burner in entire combustion process due to air preheat
It is the problem of raising of flame combustion temperature causes NOx emission to rise after temperature increases, energy saving and environmentally friendly.
To achieve the above object, the technical solution adopted by the present invention are as follows: including air hose, blast tube, fume pipe, burning
Room and ignitor, combustion chamber are placed in air hose Inner Front End opening, and the first circumferential weld gap is formed between combustion chamber and air hose, igniting
In the combustion chamber, air pipe surface is set with heat exchanger tube, and air pipe surface offers air holes, heat exchange for the firing tip setting of electrode
One end of pipe is extended to the second circumferential weld gap of formation at combustor exit at combustion chamber, and air hose rear end outer cover is equipped with band air
The air cabinet of import and exhanst gas outlet, fume pipe are sleeved on heat exchange pipe surface, and air cabinet outer surface is fixedly installed band combustion
The combustion gas shell of port, one end of blast tube are set with spring and are fixed in air hose by spring and be connected to gas port,
The blast tube other end is connected with current divider, and current divider surface is equipped with the runner of connection combustion chamber and blast tube, and combustion gas
Channel extends to the exit of combustion chamber, and fuel gas conduit is provided in blast tube, and fuel gas conduit one end extends to outside combustion gas shell, empty
It is provided with compact heat exchanger in gas shell and is sleeved on air pipe surface, compact heat exchanger is equipped with air heat-exchange inlet side, sky
Gas heat exchange outlet, flue gas heat exchange inlet side and flue gas heat exchange outlet, air heat-exchange inlet side are connected to air intlet, air heat-exchange outlet
It is connected to heat exchanger tube, flue gas heat exchange inlet side is connected to fume pipe, and flue gas heat exchange outlet is connected to exhanst gas outlet.
Preferably, the compact heat exchanger includes shell, first flange, second flange, several disposed in parallel streams
Baffle, heat exchange catheter, heat exchange catheter is through baffle is streamed, and first flange and second flange ring set are in air pipe surface and difference
The both ends of shell are fixed on, baffle is streamed and fixes inside the shell and be distributed along shell extending direction alternate intervals, heat exchange catheter
One end is fixed in first flange, and the other end of heat exchange catheter is fixed in second flange.
Preferably, the front end of several heat exchange catheters is connected to air intlet, and the rear end of heat exchange catheter and heat exchanger tube connect
It is logical；The outer wall of case nose is connected to exhanst gas outlet, and the inner wall of compact heat exchanger rear end is connected to fume pipe.
Preferably, the outer wall of outer casing back is connected to air intlet, and the inner wall and heat exchanger tube of compact heat exchanger front end connect
It is logical；The front end of several heat exchange catheters is connected to fume pipe, and the rear end of heat exchange catheter is connected to exhanst gas outlet.
Preferably, the compact heat exchanger include first flange, second flange, it is several it is disposed in parallel stream baffle,
Heat exchange catheter, heat exchange catheter, which runs through, streams baffle, first flange and second flange ring set in air pipe surface and the air of fixation
Both ends in shell stream baffle and are fixed in air cabinet and are distributed along air cabinet extending direction alternate intervals, heat exchange catheter
One end be fixed in first flange, the other end of heat exchange catheter is fixed in second flange.
Preferably, the front end of several heat exchange catheters is connected to air intlet, and the rear end of heat exchange catheter and heat exchanger tube connect
It is logical；The outer wall of compact heat exchanger front end is connected to exhanst gas outlet, and the inner wall of compact heat exchanger rear end is connected to fume pipe.
Preferably, the outer wall of compact heat exchanger rear end is connected to air intlet, the inner wall of compact heat exchanger front end with
Heat exchanger tube connection；The front end of several heat exchange catheters is connected to fume pipe, and the rear end of heat exchange catheter is connected to exhanst gas outlet.
It preferably, further include wind disk, the wind disk is socketed in current divider surface, and wind panel surface is peripherally disposed wind
Road, air duct are connected to combustion chamber and burner pipe.
Preferably, the heat exchange pipe external surface is uniformly provided with the concavo-convex fin of multiple groups.
Preferably, in the current divider, runner is for annular passage or by multiple ducts along annular spread.
The beneficial effects of the present invention are:
1. being placed in air cabinet by increasing compact heat exchanger on the basis of existing conventional stage heat exchanger is from preheating burner
Interior integrated-type secondary heat exchanger, combustion air exchange heat after entering compact heat exchanger with high-temperature fuel gas, and flue gas reduces temperature discharge,
Combustion air have passed through primary heat exchange heating, while heat exchanger tube is arranged on the surface of air hose, be set in air tube outer surface
Heat exchanger, by heat exchanger tube to the combustion air secondary heat exchange in air hose when the high-temperature fuel gas after burner combustion is back to burner
Heating, i.e., the heat exchange of two-stage is carried out to combustion air, effectively increases the efficiency of heat exchange, maximumlly improves preheated air temperature
Degree, is fully warmed-up combustion air using the waste heat of flue gas, improves efficiency of combustion, greatlys improve from the energy saving water for preheating burner
It is flat；
2. be provided with runner on current divider by being provided with current divider in the combustion chamber, can according to the needs of combustion system, if
Single blast tube or fuel gas conduit are set into combustion gas or simultaneously into combustion gas, different combustion systems is set as needed, is improved
Efficiency of combustion reduces the generation of NOx, achieves energy-saving and emission reduction purposes；
3. most of by being provided with air holes in air pipe surface in conjunction with air classification technology under the premise of combustion gas classification
Combustion air enters air hose from heat exchanger tube and reaches combustion chamber, and part combustion air enters air hose from air holes, fires with entering
Burn indoor combustion gas mixing, part combustion air enters heating space from the second circumferential weld gap, near combustor exit combustion gas,
Second-time burning is carried out after partial reflux flue gas mixing in single-stage combustion product and heating space, at high-speed flame, high-speed flame
The flue gas around inhaling can be rolled up and participate in burning, flame combustion temperature can be effectively reduced, to reduce the generation of NOx；
4., can be in burner interior arrangement by being fixed on air cabinet in blast tube surface pocketed springs and by spring
Guarantee safety and the stability of gas burning system structure when having a thermal expansivity displacement, so improve integral device physical life and
The safety used.
Detailed description of the invention
Fig. 1 is the internal structure sectional view of embodiment one；
Fig. 2 is to implement combustion air and flue gas flow direction schematic diagram in one；
Fig. 3 is combustion air and flue gas is another flows to schematic diagram in embodiment one；
Fig. 4 is combustion air and flue gas is another flows to schematic diagram in embodiment two；
Fig. 5 is the scheme of installation that radiant tube indirect heating is used in embodiment two；
Fig. 6 is the front view of first flange or second flange；
Fig. 7 is the side view of compact heat exchanger structure；
Fig. 8 is the scheme of installation of heat exchanger tube in compact heat exchanger；
Fig. 9 is the structural side view one of heat exchanger tube in compact heat exchanger；
Figure 10 be the structural side view of heat exchanger tube in compact heat exchanger secondly；
Figure 11 be the structural side view of heat exchanger tube in compact heat exchanger thirdly；
Figure 12 is the front view of Figure 11.
Specific embodiment
Embodiment one
Refering to Figure 1, the present embodiment is about a kind of high efficency low NOx compact self preheating burner, including air hose 25,
Blast tube 26, fume pipe 21, combustion chamber 28 and ignitor 3, combustion chamber 28 are placed in 25 Inner Front End opening of air hose, burning
The first circumferential weld gap is formed between room 28 and air hose 25, the firing tip of ignitor 3 is arranged in combustion chamber 28,25 surface of air hose
It is set with heat exchanger tube 23, and 25 surface of air hose offers air holes 18, one end of heat exchanger tube 23 extends at combustion chamber 28 and combustion
It burns 28 exit of room and forms the second circumferential weld gap, 25 rear end outer cover of air hose is equipped with the air with air intlet 8 and exhanst gas outlet 9
Shell 7, fume pipe 21 are sleeved on 23 surface of heat exchanger tube, and 7 outer surface of air cabinet is fixedly installed the combustion gas shell with gas port 1
5, insulating lining 6 is arranged between air cabinet 7 and combustion gas shell 5；One end of blast tube 26 is set with spring 19 and passes through bullet
Spring 19 is fixed in air hose 25 and is connected to gas port 1, and 26 other end of blast tube is connected with current divider, and current divider surface is equipped with
It is connected to the runner 30 of combustion chamber 28 and blast tube 26, and blast tube 26 extends to the exit of combustion chamber 28, combustion gas is logical
Fuel gas conduit 2 is provided in road 26,2 one end of fuel gas conduit extends to outside combustion gas shell 5, and compact heat exchange is provided in air cabinet 7
Device 12 is simultaneously sleeved on 25 surface of air hose,
It please refers to shown in Fig. 4-5, in the present embodiment, compact heat exchanger 12 includes shell 13, first flange 16, second flange
17, it is several it is disposed in parallel stream baffle 15, heat exchange catheter 14, heat exchange catheter 14 is through streaming baffle 15,16 He of first flange
17 ring set of second flange is on 25 surface of air hose and is separately fixed at the both ends of shell 13, streams baffle 15 and is fixed in shell 13
And be distributed along 13 extending direction alternate intervals of shell, one end of heat exchange catheter 14 is fixed in first flange 16, and heat exchange is led
The other end of pipe 14 is fixed in second flange 17, and compact heat exchanger 12 is equipped with air heat-exchange inlet side, air heat-exchange outlet, cigarette
Gas heat exchange inlet side and flue gas heat exchange outlet, air heat-exchange inlet side are connected to 8, and air heat-exchange outlet is connected to heat exchanger tube 23, flue gas
Heat exchange inlet side is connected to fume pipe 21, and flue gas heat exchange outlet is connected to exhanst gas outlet 9.
Air heat-exchange inlet side, air heat-exchange outlet, flue gas heat exchange inlet side and flue gas heat exchange outlet connection can be according to specific
It needs to be arranged.
Please refer to shown in Fig. 2, in the present embodiment the front end of several heat exchange catheters 14 as air heat-exchange inlet side and air into
Mouth 8 is connected to, and the rear end of heat exchange catheter 14 is connected to as air heat-exchange outlet with heat exchanger tube 23；The outer wall of 13 front end of shell is as cigarette
Gas heat exchange outlet is connected to exhanst gas outlet 9, and the inner wall of 12 rear end of compact heat exchanger is as flue gas heat exchange inlet side and fume pipe 21
Connection.Then combustion air enters in heat exchange catheter 14, and flue gas is streamed baffle 15 outside heat exchange catheter 14 and streamed, air and cigarette
The reciprocal stream of gas phase carries out heat exchange.
The working principle of the present embodiment is as follows
(1) (it is lower than specific temperature, the present embodiment is 850 DEG C) when low temperature, burner controller provides run signal, and outside supplies
Gas burning system supplies combustion gas, and combustion gas is arrived in combustion chamber 28 after the gas port 1 of combustion gas shell 5 enters gas conduct pipe 26, combustion-supporting sky
Gas enters air cabinet 7 by air intlet 8, and a part enters the heat exchange catheter 14 of compact heat exchanger 12 and backflow flue gas carries out
Enter heat exchanger tube 23 after heat exchange, then enters air hose 25 from the second circumferential weld gap of 23 end of heat exchanger tube, then pass through the first circumferential weld
Entering combustion chamber 28 through wind disk 29 after gap, another part combustion air enters air hose 28 from 25 surface air holes 18 of air hose, into
The combustion air for entering air hose 25 enters combustion chamber 28 after wind disk 29, after combustion gas is sprayed by 30 part of runner of current divider
It mixes with by the primary air of wind disk 29, through lighting (while detecting flare up fire) after-combustion from cooling electrode 3, burns
Product burns away with the secondary combustion gas mixing sprayed from 26 end of gas conduct pipe, then empty with the second level in the exit of heat exchanger tube 23
Gas mixing is burnt again, can be supplied combustion gas from fuel gas conduit 2 according to actual heating load is optional at this time, be carried out the burning of combustion gas three-level.It adopts
Cooperate specific nozzle structure with the combustion system of the double classifications of air fuel gas, can meet when low temperature load or low temperature heat up super
Low NOx drainage.
(2) (it is higher than 850 DEG C) when high temperature, closes combustion gas and supplied from gas port 1, only stay fuel gas conduit 2 to supply, while electrode 3
It misfires, air still divides two-stage to enter heating space from combustion chamber and the outlet of heat exchanger tube 23 respectively, and combustion gas is directly by fuel gas conduit 2
Into heating space, the flameless combustion of disperse is carried out under high temperature environment, and no local high temperature zone realizes ultra-low NOx emission.
Under (3) two kinds of temperature operating modes, flue gas carries out level-one heat by the air in fume pipe 21 and heat exchanger tube 23
Exchange enters in compact heat exchanger 12 carry out secondary heat exchange, at this time flue gas flow channel meeting with the air in heat exchange catheter 14 later
By streaming baffle 15, increases stroke, increase heat-exchange time, the flue gas of low temperature is discharged by smoke outlet 9 later.
Under (4) two kinds of temperature operating modes, air is changed into compact later by air cabinet 7 is entered after air scoop 8
It in hot device 12, into the heat exchange catheter 14 of compact heat exchanger 12, exchanges heat with flue gas on the outside of pipe, enters air cabinet later
Heat exchanger tube 23 is again passed by after in 7 to exchange heat with the flue gas in fume pipe 21, is carried out later combustion-supporting.
It please refers to shown in Fig. 3, the difference from Fig. 2 is that, the outer wall of 13 rear end of shell is as air in the present embodiment
Heat exchange inlet side is connected to air intlet 8, and the inner wall of 12 front end of compact heat exchanger connects as air heat-exchange outlet and heat exchanger tube 23
It is logical；The front end of several heat exchange catheters 14 is connected to as flue gas heat exchange inlet side with fume pipe 21, and the rear end of heat exchange catheter 14 is as cigarette
Gas heat exchange outlet is connected to exhanst gas outlet 9.Then flue gas enters in heat exchange catheter 14, and combustion air outside heat exchange catheter 14 through around
Stream baffle 15 streams, and air and the reciprocal stream of Gas phase Smoke carry out heat exchange.
Embodiment two
Please refer to shown in Fig. 4, the present embodiment and embodiment one the difference is that, compact heat exchanger 12 does not include shell,
It is solid to stream baffle 15 for first flange 16 and 17 ring set of the second flange both ends in the air cabinet 7 of 25 surface of air hose and fixation
It is scheduled in air cabinet 7 and is distributed along 7 extending direction alternate intervals of air cabinet, one end of heat exchange catheter 14 is fixed at the
On one flange 16, the other end of heat exchange catheter 14 is fixed in second flange 17, when it is implemented, must be in air cabinet 7
Inner wall adds insulating lining 6.
As shown in figure 4, the front end of several heat exchange catheters 14 connects as air heat-exchange inlet side and air intlet 8 in the present embodiment
Logical, the rear end of heat exchange catheter 14 is connected to as air heat-exchange outlet with heat exchanger tube 23；The outer wall of 12 front end of compact heat exchanger is made
It is connected to for flue gas heat exchange inlet side with exhanst gas outlet 9, the inner wall of 12 rear end of compact heat exchanger is as flue gas heat exchange outlet and flue gas
Pipe 21 is connected to.Then combustion air enters in heat exchange catheter 14, and flue gas is streamed baffle 15 outside heat exchange catheter 14 and streamed, air
Heat exchange is carried out with the reciprocal stream of Gas phase Smoke.
As shown in figure 5, the outer wall of 12 rear end of compact heat exchanger is air heat-exchange inlet side and air intlet 8 in the present embodiment
Connection, the inner wall of 12 front end of compact heat exchanger are that air heat-exchange outlet is connected to heat exchanger tube 23；Before several heat exchange catheters 14
End is that air heat-exchange inlet side is connected to fume pipe 21, and the rear end of heat exchange catheter 14 is that air heat-exchange outlet is connected to exhanst gas outlet 9.
Then flue gas enters in heat exchange catheter 14, and combustion air is streamed baffle 15 outside heat exchange catheter 14 and streamed, air and Gas phase Smoke
Reciprocal stream carries out heat exchange.
Heat exchanger tube 14 when the harder matter pipe of such as stainless steel tubing using being connected using being brazed metal melting mode；Heat exchanger tube 14
It is optional using the extrusion mechanicals power such as head is fixed connection (Fig. 8) is turned over when using soft pipes such as copper pipes, every side installation at this time
Flange is divided into two pieces of thin flanges of a/b.
The heat exchanger tube 14 of compact heat exchanger uses straight tube arrangement that spring type helical form can also be used and is circular layout to increase heat exchange
Area；The form of heat exchanger tube 14 includes but is not limited to smooth pipe (Fig. 9), (surface is processed to increase heat-transfer surface rough pipe
Product, please refers to Figure 10) with finned tube (parallel, spiral or being arranged vertically fin on pipe, please refer to Figure 11-12).
It is shorter than the ejection in advance of fuel gas conduit 2 to meet the optional blast tube 26 of more low NOx drainage.
For the overall heat exchange efficiency for meeting compact heat exchanger 12 and heat exchanger tube 23, design efficiency and exhaust gas temperature are realized.
The heat exchange area B of 12 heat exchange area A of compact heat exchanger and heat exchanger tube 23 meets A=0.793e2.314BRelationship.
Embodiment of above be only preferred embodiments of the present invention will be described, not to the scope of the present invention into
Row limits, and without departing from the spirit of the design of the present invention, this field ordinary engineering and technical personnel is to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (10)
1. a kind of high efficency low NOx compact self preheating burner, which is characterized in that including air hose, blast tube, flue gas
Pipe, combustion chamber and ignitor, combustion chamber are placed in air hose Inner Front End opening, form the first circumferential weld between combustion chamber and air hose
Gap, in the combustion chamber, air pipe surface is set with heat exchanger tube, and air pipe surface offers wind for the firing tip setting of ignitor
Hole, one end of heat exchanger tube are extended to the second circumferential weld gap of formation at combustor exit at combustion chamber, and air hose rear end outside is set with
There is the air cabinet with air intlet and exhanst gas outlet, fume pipe is sleeved on heat exchange pipe surface, and the fixation of air cabinet outer surface is set
It is equipped with the combustion gas shell with gas port, one end of blast tube is set with spring and is fixed in air hose by spring and combustion gas
Mouth connection, the blast tube other end are connected with current divider, and current divider surface is equipped with the runner of connection combustion chamber and blast tube,
And blast tube extends to the exit of combustion chamber, and fuel gas conduit is provided in blast tube, fuel gas conduit one end extends to combustion gas shell
In vitro, it is provided with compact heat exchanger in air cabinet and is sleeved on air pipe surface, compact heat exchanger is equipped with air heat-exchange
Inlet side, air heat-exchange outlet, flue gas heat exchange inlet side and flue gas heat exchange outlet, air heat-exchange inlet side are connected to air intlet, air
Heat exchange outlet is connected to heat exchanger tube, and flue gas heat exchange inlet side is connected to fume pipe, and flue gas heat exchange outlet is connected to exhanst gas outlet.
2. high efficency low NOx compact self preheating burner according to claim 1, which is characterized in that the compact
Heat exchanger include shell, first flange, second flange, it is several it is disposed in parallel stream baffle, heat exchange catheter, heat exchange catheter passes through
Pass around stream baffle, first flange and second flange ring set are in air pipe surface and are separately fixed at the both ends of shell, stream baffle
Fixed to be distributed inside the shell and along shell extending direction alternate intervals, one end of heat exchange catheter is fixed in first flange,
The other end of heat exchange catheter is fixed in second flange.
3. high efficency low NOx compact self preheating burner according to claim 2, which is characterized in that described several to change
The front end of heat pipe is connected to air intlet, and the rear end of heat exchange catheter is connected to heat exchanger tube；The outer wall of case nose goes out with flue gas
Mouth connection, the inner wall of compact heat exchanger rear end are connected to fume pipe.
4. high efficency low NOx compact self preheating burner according to claim 2, which is characterized in that outer casing back
Outer wall is connected to air intlet, and the inner wall of compact heat exchanger front end is connected to heat exchanger tube；The front end of several heat exchange catheters and cigarette
Tracheae connection, the rear end of heat exchange catheter is connected to exhanst gas outlet.
5. high efficency low NOx compact self preheating burner according to claim 1, which is characterized in that the compact
Heat exchanger include first flange, second flange, it is several it is disposed in parallel stream baffle, heat exchange catheter, heat exchange catheter is through streaming
Baffle, first flange and second flange the ring set both ends in air pipe surface and the air cabinet of fixation, stream baffle and are fixed on
It is distributed in air cabinet and along air cabinet extending direction alternate intervals, one end of heat exchange catheter is fixed at first flange
On, the other end of heat exchange catheter is fixed in second flange.
6. high efficency low NOx compact self preheating burner according to claim 5, which is characterized in that described several to change
The front end of heat pipe is connected to air intlet, and the rear end of heat exchange catheter is connected to heat exchanger tube；The outer wall of compact heat exchanger front end
It is connected to exhanst gas outlet, the inner wall of compact heat exchanger rear end is connected to fume pipe.
7. high efficency low NOx compact self preheating burner according to claim 5, which is characterized in that compact heat exchange
The outer wall of device rear end is connected to air intlet, and the inner wall of compact heat exchanger front end is connected to heat exchanger tube；Several heat exchange catheters
Front end is connected to fume pipe, and the rear end of heat exchange catheter is connected to exhanst gas outlet.
8. high efficency low NOx compact self preheating burner according to claim 1-7, which is characterized in that also
Including wind disk, the wind disk is socketed in current divider surface, and wind panel surface is peripherally disposed air duct, and air duct is connected to combustion chamber
With burner pipe.
9. high efficency low NOx compact self preheating burner according to claim 1-7, which is characterized in that institute
It states heat exchange pipe external surface and is uniformly provided with the concavo-convex fin of multiple groups.
10. high efficency low NOx compact self preheating burner according to claim 1-7, which is characterized in that institute
It states in current divider, runner is for annular passage or by multiple ducts along annular spread.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684866.1A CN110285418A (en) | 2019-07-26 | 2019-07-26 | A kind of high efficency low NOx compact self preheating burner |
| CN201910895500.9A CN110440256B (en) | 2019-07-26 | 2019-09-21 | High-efficiency low NOx second-level self-preheating burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910684866.1A CN110285418A (en) | 2019-07-26 | 2019-07-26 | A kind of high efficency low NOx compact self preheating burner |
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| CN201910895500.9A Active CN110440256B (en) | 2019-07-26 | 2019-09-21 | High-efficiency low NOx second-level self-preheating burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112815304A (en) * | 2020-12-31 | 2021-05-18 | 新兴铸管股份有限公司 | Combustion device and annealing furnace combustion system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB763867A (en) * | 1954-10-06 | 1956-12-19 | Sidney Flavel & Co Ltd | Improvements in or relating to gas-fired water heaters |
| ES183512Y (en) * | 1972-08-29 | 1974-05-01 | Climagas, S. A. | PERFECTED GAS WALL RADIATOR. |
| US6749014B2 (en) * | 1999-09-23 | 2004-06-15 | Joseph C. Ferraro | External flue heat exchangers |
| JP4350697B2 (en) * | 2005-11-09 | 2009-10-21 | リンナイ株式会社 | Small heat exchanger |
| JP4964641B2 (en) * | 2007-03-26 | 2012-07-04 | 東邦瓦斯株式会社 | Self-exhaust heat recovery burner |
| JP6395626B2 (en) * | 2015-01-30 | 2018-09-26 | 大阪瓦斯株式会社 | Heat exchanger for heating device and single-end radiant tube burner |
| CN205783059U (en) * | 2016-07-15 | 2016-12-07 | 哈尔滨松江电炉厂有限责任公司 | A kind of double-stage heat exchanger on continuous belt steel annealing furnace |
| CN108061299A (en) * | 2017-11-14 | 2018-05-22 | 北京兴达奇热工控制设备有限公司 | A kind of low Nox burners of L-type high efficient heat exchanging |
| CN109253630B (en) * | 2018-11-04 | 2023-09-12 | 佛山市科皓燃烧设备制造有限公司 | Two-stage heat exchange low NOx self-preheating burner |
| CN210638039U (en) * | 2019-07-26 | 2020-05-29 | 佛山市科皓燃烧设备制造有限公司 | High-efficiency low-NOx two-stage self-preheating burner |
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| CN112815304A (en) * | 2020-12-31 | 2021-05-18 | 新兴铸管股份有限公司 | Combustion device and annealing furnace combustion system |
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| CN110440256B (en) | 2024-03-19 |
| CN110440256A (en) | 2019-11-12 |
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Application publication date: 20190927 |