CN207539902U - A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow - Google Patents
A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow Download PDFInfo
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- CN207539902U CN207539902U CN201721573408.3U CN201721573408U CN207539902U CN 207539902 U CN207539902 U CN 207539902U CN 201721573408 U CN201721573408 U CN 201721573408U CN 207539902 U CN207539902 U CN 207539902U
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- shaped radiant
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- heat exchanger
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- 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
Abstract
The utility model is specifically related to a kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow, solves that existing U-shaped radiant tube heat exchange efficiency bottom is low, poor temperature uniformity, NOxDischarge the problem of high.The device includes U-shaped radiant tube, radiation inner casing tube, heat exchanger and burner；The both ends of U-shaped radiant tube are fixedly connected respectively with heat exchanger, burner, and radiation inner casing tube is arranged in U-shaped radiant tube；Heat exchanger includes cylinder, multiple heat exchanger core pipes and end caps, and burner includes housing, ignitor, combustion gas core pipe and combustion chamber；Housing is fixedly connected with U-shaped radiant tube, and combustion chamber is located in U-shaped radiant tube, including combustion outer case and burning Interior Layout.The U-shaped radiant tube combustion device of the utility model one-stroke countercurrent flow can effectively improve heat exchange efficiency, reduce burner operating cost, while can reduce NOxDischarge, contributes for energy conservation and environmental protection.
Description
Technical field
The utility model is related to burner fields, and in particular to a kind of U-shaped radiant tube burning dress of one-stroke countercurrent flow
It puts.
Background technology
U-shaped radiant tube is a kind of common indirectly heat burner, heat from radiant tube table in a manner of heat radiation
Face passes to burner hearth and by heating workpiece, and due to radiant tube by combustion product with being separated by heating workpiece, combustion product will not shadow
The high-temperature atmosphere in burner hearth, furnace atmosphere and heating temperature are rung convenient for control and is adjusted, therefore it is extensive that radiant tube is used to heat
Applied in protective atmosphere heat treatment furnace kiln, such as silicon strip heat treatment continuous annealing furnace, strip hot-dip galvanizing continuous annealing furnace.
To improve efficiency of combustion, usually U-shaped radiant tube one end installation burner, other end installation heat exchanger.In traditional U
In the design of type radiant tube, the inlet and outlet of hot-air are arranged in the homonymy of heat exchanger, and flowing of the hot-air in heat exchange at this time is two
A stroke, first stroke are countercurrent flow, and second stroke is downstream heat transfer, and in second stroke, hot-air can be forced
The heat that first stroke obtains is transferred again to flue gas or air, reduces heat exchange efficiency；Backhaul simultaneously is needed to air
Return duct is set, and return duct occupies certain space, therefore the heat exchange element quantity that can be arranged is reduced, and equally reduces heat exchange effect
Rate.Pipe heat exchanger, especially intensive pipe heat exchanger (heat exchange core pipe quantity is more than 50), has large specific surface area, heat exchange
The characteristics of efficient, but since conventional u-shaped radiant tube heat exchanger air is the flowing of two strokes, intensive pipe heat exchanger is difficult to should
With in traditional radiant tube heat exchanger, flue gas flows outside pipe, and air is in Bottomhole pressure, the partial heat of such high-temperature flue gas
It can be rejected heat in environment by tube wall, cause the waste of heat, reduce heat exchange efficiency.
Conventional u-shaped radiant tube heat exchanger hot air outlet temperature is generally higher than 500 DEG C, and exhaust gas temperature is very high, passes through heat exchange
The heat of device recycling is seldom so that heat exchange efficiency is very low.In addition conventional u-shaped radiant tube also has poor temperature uniformity, NOxDischarge is high
The shortcomings that.Since traditional U-shaped radiant tube air preheating temperature is generally relatively low, ignition temperature is relatively low.To improve
Combustion air is preheating to 800~950 DEG C by heat exchange efficiency, will be very high using flame temperature during traditional combustion mode, causes heat
Power type NOxIt steeply rises, pollutes environment.
Utility model content
The purpose of this utility model is that the existing U-shaped radiant tube heat exchange efficiency bottom of solution is low, poor temperature uniformity, NOxRow
The problem of high is put, provides a set of heat exchange efficiency high and low NOxThe U-shaped radiant tube combustion device of discharge.
The technical solution that the utility model solves the above problems is：
A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow, including U-shaped radiant tube, radiation inner casing tube, heat exchanger
And burner；The both ends of the U-shaped radiant tube are fixedly connected respectively with heat exchanger, burner, the radiation inner casing tube setting
In U-shaped radiant tube；The heat exchanger include cylinder, multiple heat exchanger core pipes and end caps, the cylinder include successively by
Outer barrel, heat insulation layer and the inner cylinder set outside to inside, the both ends of the cylinder are closed by end caps；In the inner cylinder
Axially spaced setting inner ring baffle and outer shroud baffle, the circumferential size of the inner ring baffle are less than the circumferential ruler of outer shroud baffle
It is very little；The cylinder is provided with hot-blast outlet into cigarette side, and smoke evacuation side is provided with cold wind import and fume collecting chamber, the cold wind import and
Hot-blast outlet connects, and the heat exchanger core pipe through end surface cover is arranged in inner cylinder, and one end is connected with U-shaped radiant tube,
The other end is connected with fume collecting chamber and smoke outlet tube；The burner includes housing, ignitor, combustion gas core pipe and combustion chamber；
The housing is fixedly connected with U-shaped radiant tube, and is provided with the hot wind inlet with heat exchanger hot wind outlet；The combustion chamber
In U-shaped radiant tube, including combustion outer case and burning Interior Layout, the combustion outer case is fixedly connected with the casing, described
Burning Interior Layout is arranged on inside combustion outer case, and secondary air channel is equipped between the combustion outer case and burning Interior Layout,
The secondary air channel is connected with the hot wind inlet of housing；Stable flame pan is provided in the burning Interior Layout, is set on stable flame pan
There are multiple First air through-holes, the First air through-hole is connected with the hot wind inlet of housing；The ignitor, the setting of combustion gas core pipe
Inside housings, the ignitor, combustion gas core pipe one end across stable flame pan be arranged on burning Interior Layout in, the ignition power
Pole is located at the one end for burning Interior Layout and is provided with gas spray head, and the combustion chamber is provided with the combustion chamber connected with U-shaped radiant tube
Outlet, combustion product are entered by combustor exit in radiation inner casing tube and U-shaped radiant tube.
Further, the area ratio of the First air through-hole area of passage and secondary air channel area of passage is 6:4.
Further, the diameter of the heat exchanger core pipe be no more than 10mm, between the inner ring baffle and outer shroud baffle between
Away from for 100~150mm.Pipe heat exchanger core pipe caliber is small, can improve total heat exchange area.
Further, the heat exchanger, burner and the junction of U-shaped radiant tube and heat exchanger hot-blast outlet and burning
The junction of device hot wind inlet is wrapped in fireproof heat-insulating fiber.
Further, further to reduce heat dissipation of the heat exchanger to environment, the heat insulation layer uses aerosol heat-barrier material.
Further, the spacing of the combustor exit and radiation inner casing tube is 80~130mm.
Further, in order to increase the reflux of flue gas, the U-shaped radiant tube of a diameter of 0.7 times of the inner casing tube of radiation is straight
Diameter, radiation inner casing tube length are 5 times of U-shaped radiation pipe diameters.
Further, in order to reduce heat exchanger and the outside heat loss of burner tip, the heat exchanger and burner are remote
End from U-shaped radiant tube is both provided with heat-insulating material.
Further, the material of the burner shell is heat-resistance stainless steel, and the material of combustion chamber is silicon carbide, U-shaped spoke
The material for penetrating pipe is heat resisting steel, and the material for radiating inner casing tube is silicon carbide.
Further, the heat exchanger core pipe is pipe, square tube, flat tube or elliptical tube.
The advantages of the utility model is：
1. the U-shaped radiant tube combustion device of the utility model one-stroke countercurrent flow can effectively improve heat exchange efficiency, reduce
Burner operating cost, while NO can be reducedxDischarge, contributes for energy conservation and environmental protection.
2. the utility model flue gas, in heat exchanger core Bottomhole pressure, heat exchanger core pipe boundary layer is relatively thin, and equivalent diameter is smaller,
The coefficient of heat transfer is relatively high, and air flows outside pipe, and using outer shroud baffle, two baffles make air constantly wash away heat exchange back and forth
Core pipe, while residence time of the air in heat exchanger is extended, improve heat exchange efficiency.
3. the utility model reduces NO using fractional combustion and flue gas recirculation modexDischarge, secondary air flow account for about total wind
The 40% of amount, excess air coefficient control is 1.05 or so, and combustor exit speed control is in more than 150m/s, combustor exit
With radiation inner casing tube spacing control in 80~130mm, so as to reduce combustion zone O2Concentration makes burning be happened at hypoxemia ring
Border reduces flame temperature and reduces thermal NOxIt is formed.
4. the utility model is by flue gas, reflux solves the defects of poor temperature uniformity, the gas after the burning of part at a high speed
It is sprayed at a high speed from combustor exit, by jet stream ejector action, volume inhales a large amount of surrounding flue gases of surrounding and enters radiation inner casing tube combustion
It burns, reduces flame peak temperature, prolonging burning time and the length of flame, improve radiant tube surface temperature uniformity.
5. the hot wind inlet of the utility model burner and heat exchanger hot wind outlet；Due to inverse using air one-stroke
Heat exchanger is flowed, combustion air can be preheated to very high temperature, and up to 800~950 DEG C, the combustion air of high-temperature makes burner
Interior flame temperature reduces, and solves traditional combustion system flame temperature height, causes thermal NOxThe problem of steeply rising.
6. the utility model setting radiation inner casing tube, sprays at a high speed mixed gas and two after the primary combustion in radiant tube
Secondary wind can induce a large amount of smoke backflows, reduce fuel and O2Concentration makes burning be happened at low-oxygen environment, reduce flame temperature and
Reduce thermal NOxIt is formed.
Description of the drawings
Fig. 1 is the U-shaped radiant tube combustion device structure chart of the utility model embodiment one-stroke countercurrent flow；
Fig. 2 is the utility model embodiment heat exchanger schematic diagram；
Fig. 3 is the A-A diagrammatic cross-sections of Fig. 2；
Fig. 4 is the structure chart of the utility model embodiment burner；
Fig. 5 is the structure chart of the utility model embodiment stable flame pan；
Fig. 6 is the U-shaped radiant tube combustion device local structural graph of the utility model embodiment one-stroke countercurrent flow.
Reference numeral：1- heat exchangers, 2- installation frames, 3- refractory thermal insulating materials, 4-U type radiant tubes, 5- radiation pipe carriers,
6- radiates inner casing tube, 7- burners, 11- smoke outlet tubes, 12- fume collecting chamber, 13- cold wind imports, 14- outer barreies, 15- thermal insulation
Layer, 16- inner cylinders, 17- heat exchanger core pipes, 18- outer shroud baffles, 19- inner ring baffles, 110- hot-blast outlets, 70- housings, 71- combustions
Gaseous core pipe, 72- ignitors, 73- sizing thermal insulation materials, 74- hot wind inlets, 75- mounting flanges, 76- stable flame pans, 77- combustion gas
Nozzle, 78- combustion outer cases, 79- burning Interior Layouts, 710- secondary air channels, 711- combustor exits, 712- First airs lead to
Hole.
Specific embodiment
The content of the utility model is described in further detail below in conjunction with the drawings and specific embodiments：
A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow as shown in Figures 1 to 6, including U-shaped radiant tube 4, spoke
Penetrate inner casing tube 6, heat exchanger 1 and burner 7；The both ends of U-shaped radiant tube 4 are fixedly connected respectively with heat exchanger 1, burner 7, spoke
Inner casing tube 6 is penetrated to be arranged in U-shaped radiant tube 4；U-shaped radiant tube 4 is fixedly mounted by radiating pipe carrier 5；Heat exchanger 1 includes cylinder
Body, multiple heat exchanger core pipes 17 and end caps, cylinder include outer barrel 14, the heat insulation layer 15 and interior of ecto-entad setting successively
Cylinder 16, the both ends of cylinder are closed by end caps；Axially spaced setting inner ring baffle 19 and outer shroud gear in inner cylinder 16
Plate 18, the circumferential size of inner ring baffle 19 are less than the circumferential size of outer shroud baffle 18；Cylinder is provided with hot-blast outlet into cigarette side
110, smoke evacuation side is provided with cold wind import 13 and fume collecting chamber 12, and cold wind import 13 is connected with hot-blast outlet 110, heat exchanger core pipe 17
It is arranged in inner cylinder 16 across end caps, one end is connected with U-shaped radiant tube 4, and the other end goes out with fume collecting chamber 12 and flue gas
Mouth pipe 11 connects.
Burner 7 includes housing 70, ignitor 72, combustion gas core pipe 71 and combustion chamber；Housing 70 is solid with U-shaped radiant tube 4
Fixed connection, and it is provided with the hot wind inlet 74 connected with heat exchanger hot-blast outlet 110；Combustion chamber is located in U-shaped radiant tube 4, packet
Combustion outer case 78 and burning Interior Layout 79 are included, combustion outer case 78 is fixedly connected with housing 70, and burning Interior Layout 79 is arranged on
Inside combustion outer case 78, secondary air channel 710, secondary air channel are equipped between combustion outer case 78 and burning Interior Layout 79
710 connect with the hot wind inlet 74 of housing 70；Stable flame pan 76 is provided in burning Interior Layout 79, is provided on stable flame pan 76 multiple
First air through-hole 712, First air through-hole 712 are connected with the hot wind inlet 74 of housing 70；Ignitor 72, combustion gas core pipe 71 are set
Inside housing 70, ignitor 72, combustion gas core pipe 71 one end across stable flame pan 76 be arranged on burning Interior Layout 79 in, igniting
One end that electrode 72 is located at burning Interior Layout is provided with gas spray head 77, and combustion chamber is provided with the combustion chamber connected with U-shaped radiant tube 4
Outlet 711, combustion product are entered by combustor exit 711 in radiation inner casing tube 6 and U-shaped radiant tube 4.
The utility model burner heat exchanger 1 uses counter-current tubular exchanger, and flue gas is in Bottomhole pressure, core pipe boundary layer
Relatively thin, equivalent diameter is smaller, and the coefficient of heat transfer is relatively high, and to improve heat exchange efficiency, the diameter of pipe heat exchanger core pipe 17 does not surpass
Cross 10mm；17 caliber of pipe heat exchanger core pipe is small, can improve total heat exchange area；Caliber is small, and gas is laminar flow stream in pipe
Dynamic, the coefficient of heat transfer is inversely proportional with heat exchanger tube diameter, and diameter is smaller, and the coefficient of heat transfer is bigger.Air flows outside pipe, reduces heat exchange
Heat dissipation of the device 1 to environment, air-flow direction are arranged at intervals inner ring baffle 19, outer shroud baffle 18, and spacing is between two baffles
100~150mm, theoretically for, spacing is smaller between baffle, then heat transfer effect is better, but to after certain numerical value, increases gear
Plate heat transfer effect is improved with regard to unobvious, therefore the utility model is limited to 100~150mm, in inner ring baffle 19 and outer shroud
Under baffle 18 acts on, air is made constantly to wash away heat exchange core pipe back and forth, while extend residence time of the air in heat exchanger 1,
Improve heat exchange efficiency.
U-shaped 4 burner of radiant tube may be configured as non-isometric structure by the utility model, and heat exchanger 1 is grown, and burner 7 is short,
Heat exchanger hot-blast outlet 110 and the hot wind inlet 74 of burner 7 link together, and the high temperature air being preheated is directly entered burning
In device 7, the one-stroke movement of air in heat exchanger 1 is realized rather than as isometric U-shaped 4 structure of radiant tube of tradition, hot-air goes out
Mouth is arranged in the end of heat exchanger 1, and flowing of the hot-air in heat exchange is two strokes.Due to being changed using air one-stroke adverse current
Hot device 1, combustion air can be preheated to very high temperature, and up to 800~950 DEG C, the combustion air of high-temperature makes in burner 7
Flame temperature reduce, it is high to solve traditional combustion system flame temperature, causes thermal NOxThe problem of steeply rising.
In order to easy for installation and reduce to external heat losses, by heat exchanger 1, burner 7 at the flanged joint of radiant tube with
And heat exchanger 1 and the flange connections of burner 7 are wrapped in refractory thermal insulating material 3, refractory thermal insulating material 3 is specially that fire resisting is exhausted
Thermal fiber, fireproof heat-insulating fiber are fixedly mounted by installation frame 2, further to reduce heat dissipation of the heat exchanger 1 to environment, are used
Aerosol heat-barrier material, while to overcome aerosol heat-barrier material (thermal conductivity factor is less than 0.03J/m* DEG C) intensity is insufficient to lack
Point is filled between 1 inside and outside casing of heat exchanger.In order to reduce the outside heat loss of heat exchanger 1 and 7 end of burner,
The end of heat exchanger 1 and burner 7 is respectively provided with heat-insulating material.The material of combustion outer case 78 is heat-resistance stainless steel, such as
Cr25Ni20, the material of combustion chamber is silicon carbide, and the material of U-shaped radiant tube 4 is heat resisting steel, and the material of radiation inner casing tube 6 is
Silicon carbide.
The utility model reduces NO using fractional combustion and flue gas recirculation modexDischarge, fractional combustion will be needed for burnings
Air classification be sent into combustion zone, flue gas recirculation be by by burn generate flue gas be reintroduced back to combustion zone, reduce
The oxygen concentration of reaction zone so as to fulfill flame peak temperature is reduced, reaches and reduces NOxThe purpose of discharge；Influence thermal NOx
The principal element of generation includes temperature and O2Concentration, flue gas recirculating technique can reduce the two parameters simultaneously.Excess air
Factor alpha is to influence NOxThe important parameter of generation can change the excess air coefficient α in primary zone domain by air classification, make combustion
Burning is happened at α<In 1 atmosphere, burning is divided into oxygen-depleted zone and oxygen-rich area.Secondary Air outlet is located at 711 outside of combustor exit, secondary
Air quantity accounts for about the 40% of total blast volume, and excess air coefficient control is 1.05 or so, and 711 speed control of combustor exit is in 150m/s
More than, excess air coefficient α is the ratio of actual air dosage and theoretical air dosage, and the sky of combustion apparatus is entered by control
Tolerance and gas quantity realize the control to excess air coefficient.Combustor exit 711 and the 6 spacing control of radiation inner casing tube exist
80~130mm, so as to reduce combustion zone O2Concentration makes burning be happened at low-oxygen environment, reduces flame temperature and reduces heating power
Type NOxIt is formed.Combustor exit 711 and radiation 6 spacing of inner casing tube are excessive or too small, are all unfavorable for inducing smoke backflow,
Therefore this distance is limited to 80~130mm by the utility model.
The radiation pipe diameter that 6 diameter of inner casing tube is about 0.7 times is radiated, radiation 6 length of inner casing tube is about 5 times of radiant tubes
Diameter, 0.7 times of radiation pipe diameter, the purpose is to ensure that the circulation area of sleeve outer shroud and sleeve inner circle is close, radiant tube
6 length of inner sleeve is about 5 times of radiation pipe diameters, it is therefore an objective to increase the reflux of flue gas, while ensure the length of sleeve, so as to secondary
Burning can be completed in sleeve.
To reduce the leakage of air, combustion outer case 78 and combustion chamber mounting flange 75 as casting or welding structure, firing
It burns and forms secondary air channel 710 between outdoor set 78 and combustion chamber.Heat exchanger core pipe 17 is that pipe is only the utility model shape
One of formula or the other forms such as square tube, flat tube, elliptical tube.
The course of work：Combustion air is passed first into, burner 7 is purged, purge time was not less than 1 minute, then
Igniting detecting electrode is adjusted to ignition mode, sustained breakdown air release electric spark.Be passed through combustion gas, combustion gas through combustion gas core pipe 71,
It is sprayed into combustion chamber by gas spray head 77, the combustion air less than 60% forms swirling eddy, into burning by stable flame pan 76
Room.The combustion gas that gas spray head 77 sprays is mixed with the air draught rotated in combustion chamber, is ignited firing under the action of electric spark
It burns.Then, ignitor 72 is closed, igniting detecting electrode will enter detection pattern, if ion current signal cannot be detected,
Combustion gas is closed, restarts purging and ignition operation, if ion current signal can be detected, shows that gas burner 7 works just
Often.40% combustion air is burnt by the gap between combustion chamber and combustion outer case 78, the at a high speed interior participation of penetrating radiant tube,
Ratio by First air discharge area and Secondary Air discharge area is about 6:4.Gas after Indoor Combustion of burning, from combustion chamber
Outlet 711 sprays at a high speed, more than 150m/s.Mixed gas and Secondary Air after primary combustion in penetrating radiant tube at a high speed, can lure
A large amount of smoke backflows are led, reduce fuel and O2Concentration makes burning be happened at low-oxygen environment, reduces flame temperature and reduces heating power type
NOxIt is formed.
Flue gas will be moved along radiant tube, into heat exchanger core pipe 17, about 1000 DEG C of flue-gas temperature at this time, subsequently into changing
1 fume collecting chamber 12 of Re Qi is discharged by 1 smoke outlet tube 11 of heat exchanger, and the flue-gas temperature that heat exchanger 1 is discharged is less than 300 DEG C.It is combustion-supporting cold
Air is entered by cold air inlet duct in heat exchanger 1, in the case where heat exchanger inner ring baffle 19 and outer shroud baffle 18 act on, can laterally be rushed
Brush heat exchanger core pipe 17, air themperature will be preheated to 800 DEG C after several strokes, and the air being then preheated is by heat exchanger
1 hot air outlet outflow heat exchanger 1 by hot air inlet, into burner 7, participates in burning.
Claims (10)
1. a kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow, it is characterised in that：Including U-shaped radiant tube (4), radiant tube
Inner sleeve (6), heat exchanger (1) and burner (7)；The both ends of the U-shaped radiant tube (4) respectively with heat exchanger (1), burner
(7) it is fixedly connected, the radiation inner casing tube (6) is arranged in U-shaped radiant tube (4)；
The heat exchanger (1) includes cylinder, multiple heat exchanger core pipes (17) and end caps, and the cylinder is included successively by extroversion
The outer barrel (14) of interior setting, heat insulation layer (15) and inner cylinder (16), the both ends of the cylinder are closed by end caps；It is described
Axially spaced setting inner ring baffle (19) and outer shroud baffle (18), the circumferential ruler of the inner ring baffle (19) in inner cylinder (16)
The very little circumferential size less than outer shroud baffle (18)；The cylinder is provided with hot-blast outlet (110) into cigarette side, and smoke evacuation side is provided with
Cold wind import (13) and fume collecting chamber (12), the cold wind import (13) connect with hot-blast outlet (110), the heat exchanger core pipe
(17) it is arranged in inner cylinder (16) across end caps, one end is connected with U-shaped radiant tube (4), the other end and fume collecting chamber
(12) it is connected with smoke outlet tube (11)；
The burner (7) includes housing (70), ignitor (72), combustion gas core pipe (71) and combustion chamber；The housing (70)
It is fixedly connected with U-shaped radiant tube (4), and is provided with the hot wind inlet (74) connected with heat exchanger hot-blast outlet (110)；
The combustion chamber is located in U-shaped radiant tube (4), including combustion outer case (78) and burning Interior Layout (79), the burning
Outdoor set (78) is fixedly connected with housing (70), and the burning Interior Layout (79) is arranged on combustion outer case (78) inside, described
Secondary air channel (710), the secondary air channel (710) and shell are equipped between combustion outer case (78) and burning Interior Layout (79)
Hot wind inlet (74) connection of body；Stable flame pan (76) is provided in the burning Interior Layout (79), stable flame pan is provided on (76)
Multiple First air through-holes (712), the First air through-hole (712) connect with the hot wind inlet (74) of housing；The ignitor
(72), combustion gas core pipe (71) is arranged on that housing (70) is internal, the ignitor (72), combustion gas core pipe (71) one end pass through it is steady
Flame disk (76) is arranged in burning Interior Layout (79), and the ignitor (72) is positioned at the one end for burning Interior Layout and is provided with combustion gas
Nozzle (77), the combustion chamber are provided with the combustor exit (711) connected with U-shaped radiant tube (4), and combustion product passes through burning
Room outlet (711) enters in radiation inner casing tube (6) and U-shaped radiant tube (4).
2. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 1, it is characterised in that：It is described primary
The area ratio of wind through-hole (712) area of passage and secondary air channel (710) area of passage is 6:4.
3. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 2, it is characterised in that：The heat exchange
The diameter of device core pipe (17) be no more than 10mm, between the inner ring baffle (19) and outer shroud baffle (18) spacing be 100~
150mm。
4. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claims 1 or 2 or 3, it is characterised in that：Institute
State heat exchanger (1), burner (7) and the junction of U-shaped radiant tube (4) and heat exchanger hot-blast outlet (110) and burner heat
The junction of wind inlet (74) is wrapped in fireproof heat-insulating fiber.
5. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 4, it is characterised in that：The thermal insulation
Layer (15) uses aerosol heat-barrier material.
6. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 5, it is characterised in that：The burning
It is 80~130mm that room, which exports (711) and the spacing of radiation inner casing tube (6),.
7. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 6, it is characterised in that：The radiation
U-shaped radiant tube (4) diameter of a diameter of 0.7 times of inner casing tube (6), radiation inner casing tube (6) length are 5 times of U-shaped radiant tubes (4)
Diameter.
8. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 7, it is characterised in that：The heat exchange
The end of device (1) and burner (7) far from U-shaped radiant tube (4) is both provided with heat-insulating material.
9. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 8, it is characterised in that：The burning
The material of device housing (70) is heat-resistance stainless steel, and the material of combustion chamber is silicon carbide, and the material of U-shaped radiant tube (4) is heat resisting steel,
The material for radiating inner casing tube (6) is silicon carbide.
10. the U-shaped radiant tube combustion device of one-stroke countercurrent flow according to claim 9, it is characterised in that：The heat exchange
Device core pipe (17) is pipe, square tube, flat tube or elliptical tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721573408.3U CN207539902U (en) | 2017-11-22 | 2017-11-22 | A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721573408.3U CN207539902U (en) | 2017-11-22 | 2017-11-22 | A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207539902U true CN207539902U (en) | 2018-06-26 |
Family
ID=62614737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721573408.3U Active CN207539902U (en) | 2017-11-22 | 2017-11-22 | A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207539902U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906513A (en) * | 2017-11-22 | 2018-04-13 | 西安科技大学 | A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow |
| CN110147128A (en) * | 2019-06-11 | 2019-08-20 | 广东环葆嘉节能科技有限公司 | A kind of temprature control method and device |
-
2017
- 2017-11-22 CN CN201721573408.3U patent/CN207539902U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906513A (en) * | 2017-11-22 | 2018-04-13 | 西安科技大学 | A kind of U-shaped radiant tube combustion device of one-stroke countercurrent flow |
| CN110147128A (en) * | 2019-06-11 | 2019-08-20 | 广东环葆嘉节能科技有限公司 | A kind of temprature control method and device |
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Effective date of registration: 20200624 Address after: Room 202, unit 1, building 2, sanmi Yangguang community, Chenyang community, chenyangzhai sub district office, Fengxi new town, Xixian New District, Xianyang City, Shaanxi Province Patentee after: SHAANXI SHANGAO SHUIYUAN MACHINERY MANUFACTURING Co.,Ltd. Address before: Beilin District Yanta Road 710054 Shaanxi city of Xi'an Province, No. 58 Patentee before: XI'AN University OF SCIENCE AND TECHNOLOGY |
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