CN206478642U - Industrial furnace heat accumulating type low nitrogen nitride burner - Google Patents

Abstract

The utility model discloses industrial furnace heat accumulating type low nitrogen nitride burner, the combustion air that independent arrangement is provided with burner body enters passage and fuel inlet passage, combustion air and gaseous fuel is each led into the burner hearth of burner；Enter in combustion air on passage, be provided with heat storage and vortex of air import, combustion air produces rotating vortex through vortex of air import air inlet rotating channel；In fuel inlet passage, it is provided with fuel circulator and produces rotating vortex；Enter in combustion air in passage, low-temperature ignition rifle and auxiliary feed pipe are set, auxiliary feed pipe is passed through combustion air into passage.Flat-flame burner of the present utility model, the air and fuel of rotation are each to have the passage of oneself by oneself, and the air of rotation and the fuel of rotation respectively enter burner hearth, in inboard wall of burner hearth formation parallel shafting, so as to avoid influence of the flame to workpiece, lower emitting nitride；The effect of bias combustion is produced, further lowers emitting nitride.

Description

Industrial furnace heat accumulating type low nitrogen nitride burner

Technical field

The utility model is related to burner, in particular by the industrial furnace heat accumulating type as fuel such as natural gas, liquefied gas Low nitrogen nitride burner.

Background technology

Using the industrial furnace as fuel such as natural gas, liquefied gas, its partial combustion burner uses parallel shafting technology, control The height of flame, prevents flame from directly being contacted with heated work pieces to be added, produces overheat or the phenomenon of scaling loss workpiece, influences the property of workpiece Can etc..A kind of existing technology is hybrid channel, fuel and the air of the air rotation that fuel is passed through with one heart while rotating Vortex Into hybrid channel, fuel sprays into air rotating channel, due to the centrifugal force that rotation is produced, flame is formed the flat of fiery disk shape The flat flame form of paving, forms radiant heating, it is to avoid flame directly contact to produce with heated work pieces to be added and overheated or scaling loss workpiece shows As.

But, existing heat storage type combustion structure, its fuel is with high temperature air in same hybrid channel mixing and burning mistake Cheng Zhong, the temperature of flame is too high, can produce substantial amounts of nitride NOx, and nitride NOx will be typically produced more than 600 DEG C, and When reaching more than 1200 DEG C of industrial furnace ordinary temperature, oxygen and the nitride NOx volumes that nitrogen produces reaction production are very more；Nitrogen Compound is a kind of major pollutants of atmosphere pollution, and its main harm is to damage the ozone layer, produce acid rain, infringement human body respiration system System etc., the harm to environment and human body is all very big.

In the prior art, in order to reduce industrial furnace burn at high temperature generation nitride volume, prevent its pollute environment and Health is damaged, generally using methods such as bias combustion, smoke backflow and high temperature air dispersed combustions；But, use with top Although method can reduce industrial furnace and burn at high temperature the nitridation object amount of generation, it destroys flame forms, and flat flame state pair Some operating modes are desirable.

The content of the invention

The utility model is difficult to form flat flame for what industrial furnace heat accumulating type low nitrogen nitride burner in the prior art was present Or the problem of do not become the flat flame state of standard, causing to produce substantial amounts of NOx of nitride etc., not enough there is provided a kind of industrial furnace Heat accumulating type low nitrogen nitride burner.

The technical solution of the utility model：Industrial furnace heat accumulating type low nitrogen nitride burner, including burner body, its feature It is：The combustion air that independent arrangement is provided with burner body enters passage and fuel inlet passage, and combustion air enters Enter passage and fuel inlet passage to connect with the burner hearth of burner respectively, combustion air and gaseous fuel are each led into burner Burner hearth in；Enter in combustion air on passage, be provided with heat storage, heat storage is entered by heat exchange, heating from air inlet The relatively low combustion air of temperature；Behind heat storage, vortex of air import, vortex of air import and sky below are provided with Gas rotating channel is connected, and combustion air produces rotating vortex through vortex of air import air inlet rotating channel；Enter in fuel In passage, fuel circulator is provided with, gaseous fuel produces rotating vortex by fuel circulator；

On burner body, enter in combustion air in passage, low-temperature ignition rifle and auxiliary feed pipe, auxiliary are set Feed pipe is passed through combustion air and entered in passage.

Further feature is：Fuel circulator completely or partially closes fuel inlet passage air inlet side inner chamber, in fuel Several oblique air intake ducts are set on the side wall of circulator, and oblique air intake duct passes through the side wall of fuel circulator, is rotated with fuel The inner chamber connection of device, inner chamber is connected with fuel inlet passage outlet side again.

Rotatable demarcation strip is set on fuel circulator, and demarcation strip is completely or partially in closing fuel inlet passage Chamber, on demarcation strip, sets several oblique seams, the axis of oblique seam, or center line, and the axis with fuel inlet passage is uneven OK, the axis relative to fuel inlet passage is obliquely installed, and is connected the fuel inlet passage of demarcation strip both sides by oblique seam.

The cross-sectional area of the vortex of air import is gradually reduced.

The center of the vortex of air import and the center decentraction of air rotating channel.

The utility model industrial furnace heat accumulating type low nitrogen nitride burner, relative to prior art, with following feature：

1st, the air and fuel of rotation are each has the passage of oneself by oneself, and fuel channel can be multiple passages, it is preferable that Mode be 1-2 roads.The air of rotation and the fuel of rotation respectively enter burner hearth, in inboard wall of burner hearth formation parallel shafting, so that Avoid influence of the flame to workpiece.

2nd, because air and fuel using different passages enter body of heater, air rotation can suck a large amount of in the air passageway Furnace gas, reduce the oxygen content in air；Fuel rotation can equally suck furnace gas in fuel channel, and furnace gas is mixed with fuel So as to reduce the calorific value of fuel, so as to reduce flame temperature；Influence of the flame to workpiece can be reduced, lower nitride row Put.

3rd, the entrance body of heater burning of different passages can cause air to mix uneven with fuel, so as to produce bias combustion Effect, so as to further lower emitting nitride.

4th, there are position and height in the outlet of air rotating channel and the outlet of fuel rotating channel each other not in same plane Difference, can further increase air and mix unevenness with fuel, so that the effect of bias combustion is produced, so as to further lower nitrogen Compound is discharged.

Brief description of the drawings

The existing the utility model burner structure front views of Fig. 1；

Fig. 2 is Fig. 1 right view；

Fig. 3 be Fig. 2 A-A to sectional view；

Fig. 4 be Fig. 1 B-B to sectional view；

Fig. 5 is Fig. 2 C-C to sectional view；

Fig. 6 is the first example structure schematic diagram of the utility model fuel-feed pipe；

Fig. 7 is the utility model fuel-feed second of example structure schematic diagram of pipe；

Fig. 8 is the utility model fuel circulator（Part 8）The first example structure figure；

Fig. 9 is the utility model fuel circulator（Part 8）Second of example structure figure.

Embodiment

Shown in Fig. 1-6, the utility model industrial furnace heat accumulating type low nitrogen nitride burner, including burner body 1, burning The furnace lining of device body 1 is made using refractory material, meets the resistant to elevated temperatures use needs of burner；Set in burner body 1 There is the independent combustion air arranged to enter passage 2 and fuel inlet passage 3, combustion air enters passage 2 and fuel inlet passage 3 Connected respectively with the burner hearth of burner, combustion air and fuel are each led into the burner hearth of burner；Enter in combustion air On passage 2, vortex of air import 6 is provided with, vortex of air import 6 is connected with positioned at air rotating channel 7 below, air rotation The center of wind inlet 6 and the center decentraction of air rotating channel 7, center line are misaligned or not parallel；Vortex of air import 6 is most Best placement is the tangent position positioned at air rotating channel 7, air rotating channel 7 and burner hearth UNICOM, enters and helps from air inlet 5 The combustion air of air inlet passage 2 is fired by vortex of air import 6, from tangential direction air inlet rotating channel 7, produces rotation Turn air-flow（Vortex）, flowed in a rotative pattern in air rotating channel 7, into burner hearth.Vortex of air import 6 can be 1 Or several holes, from easily manufactured angle, the preferably square hole that tangentially enters or garden hole.Vortex of air import 6 Cross-sectional area can be Stepwize Shrink, progressively diminish, formed necking effect.Principle or structure that air rotates is allowed to have many Kind, the utility model uses the center of vortex of air import 6 and the center decentraction of air rotating channel 7, and decentraction is got over Greatly, the speed of vortex of air import 6 is higher, and the centrifugal force of gas is also big in air rotating channel 7, into burner hearth after in centrifugal force Under effect, gas can be sprawled along furnace wall, form parallel shafting structure.

Enter in combustion air on passage 2, heat storage 4, heat storage 4 can also be provided with before vortex of air import 6 By regenerative heat exchange mode, using the energy heats heat storage 4 of high-temperature flue gas, then heated and entered from air inlet 5 by heat storage 4 The relatively low combustion air of temperature.

In fuel inlet passage 3, fuel inlet pipe is generally set, and fuel inlet pipe is by fuel inlet end and outside The cartridge connection connect, enters burner hearth by outside gaseous fuel by fuel inlet passage 3；On fuel inlet passage 3, if Fuel circulator 8 is equipped with, gaseous fuel is made by being produced during fuel circulator 8 in fuel inlet passage 3 by fuel circulator 8 Raw swirling eddy（Vortex）, fuel flows in a rotative pattern, into burner hearth.Described fuel circulator 8, its structure has a variety of, The utility model provides two kinds of specific embodiment structures, as shown in figure 8, the path to shorten swirling eddy as far as possible, combustion preferably Material circulator 8 is arranged in fuel inlet passage 3, or in the fuel inlet pipe of fuel inlet passage 3, fuel circulator 8 The inner chamber of all or part of closing air inlet side of fuel inlet passage 3, set on the side wall of fuel circulator 8 several it is oblique enter Air flue 9, oblique air intake duct 9 passes through the side wall of fuel circulator 8, is connected with the inner chamber 10 of fuel circulator 8, fuel circulator 8 Inner chamber 10 connected again with the outlet side of fuel inlet passage 3, the fuel flowed into from the air inlet side of fuel inlet passage 3 through it is oblique enter Air flue 9 is passed through the inner chamber 10 of fuel circulator 8, then enters the outlet side of passage 3 by the incoming fuel of inner chamber 10, or is directly entered stove Thorax.Chord line of the oblique air intake duct 9 along the circumference of fuel circulator 8 is set, i.e., parallel not with the diametric(al) of fuel circulator 8, Optimum structure is the tangential direction setting along the circumference of fuel circulator 8, so from the oblique incoming fuel circulator 8 of air intake duct 9 The fuel of inner chamber 10, produces swirling eddy, in a rotative pattern, into burner hearth.Because the fuel from fuel inlet passage 3 is from oblique Air intake duct 9 is passed through the inner chamber 10 of fuel circulator 8, and oblique air intake duct 9 is set in the chord line or tangential direction of fuel circulator 8 Put, therefore the per share fuel being passed through from oblique air intake duct 9 all rotates in inner chamber 10, after mutually converging, forms swirling eddy.

Second of specific embodiment structure of the utility model fuel circulator 8, as shown in figure 9, being arranged on fuel entrance In passage 3, all or part of closing fuel inlet passage 3 inner chamber of fuel circulator 8 sets rotatable on fuel circulator 8 Demarcation strip 11, all or part of closing fuel inlet passage 3 inner chamber of demarcation strip 11 on demarcation strip 11, sets several oblique To seam 12, the axis of oblique seam 12（Or center line）Axis with fuel inlet passage 3 is not parallel, relative to fuel inlet passage 3 axis is obliquely installed, and is connected the fuel inlet passage 3 of the both sides of demarcation strip 11 by oblique seam 12.

Because oblique seam 12 is obliquely installed relative to the axis of fuel inlet passage 3, enter from the feed end of fuel inlet passage 3 Enter the fuel of oblique seam 12, demarcation strip 11 can be promoted to rotate, the demarcation strip 11 of rotation produces agitation left and right to combustion gas, makes gas rotary Turn, form swirling eddy.

Except two kinds of foregoing sectional drawing structures are unexpected, gas is forced（Combustion air, combustion gas）The mode of rotation is a lot, may be used also With using modes such as spiral cases.Emphasis is the swirling eddy with certain kinetic energy, under the influence of centrifugal force, into burner hearth after along stove Wall is sprawled, and is affixed on furnace wall face and is formed flat flame.

As in Fig. 1-6, burner of the present utility model on burner body 1, is additionally provided with the He of burning torch interface 14 Detection probe interface 15, the burning torch of adapted is passed through burner hearth by burning torch interface 14, produces ignition action, and the detection of adapted is visited Head, such as ultraviolet probe are set by detection probe interface 15, to detect the flame in burner hearth.These structures or device, can To use prior art, it is not described in further detail herein.

As shown in fig. 7, in order to strengthen low-temperature ignition reliability, on burner body 1, entering passage 2 in combustion air It is interior, low-temperature ignition rifle 16 and auxiliary feed pipe 17 are set, and auxiliary feed pipe 17 is passed through combustion air and entered in passage 2, protects Demonstrate,prove burner using in the initial stage of that temperature is relatively low when, can normal ignition, prevent potential security incident.

Finally it should be noted that above example is only to illustrate the technical solution of the utility model rather than restriction technologies Scheme, although the utility model is described in detail with reference to preferred embodiment by applicant, one of ordinary skill in the art It should be appreciated that those modify or equivalent substitution to the technical solution of the utility model, without departing from the technical program Objective and scope, all should cover among right of the present utility model.

Claims (5)

1. industrial furnace heat accumulating type low nitrogen nitride burner, including burner body（1）, it is characterised in that：In burner body（1） The combustion air for being inside provided with independent arrangement enters passage（2）And fuel inlet passage（3）, combustion air enters passage（2）With Fuel inlet passage（3）Connected respectively with the burner hearth of burner, combustion air and gaseous fuel are each led into the stove of burner In thorax；Enter passage in combustion air（2）On, it is provided with heat storage（4）, heat storage（4）By heat exchange, heat from air inlet （5）The relatively low combustion air of the temperature of entrance；In heat storage（4）Behind, it is provided with vortex of air import（6）, vortex of air Import（6）With air rotating channel below（7）Connection, combustion air is through vortex of air import（6）Air inlet rotating channel （7）, produce rotating vortex；In fuel inlet passage（3）It is interior, it is provided with fuel circulator（8）, gaseous fuel rotated by fuel Device（8）Produce rotating vortex；

In burner body（1）On, enter passage in combustion air（2）It is interior, low-temperature ignition rifle is set（16）With auxiliary feed pipe Road（17）, aid in feed pipe（17）It is passed through combustion air and enters passage（2）It is interior.

2. industrial furnace heat accumulating type low nitrogen nitride burner according to claim 1, it is characterised in that：Fuel circulator（8）Entirely Portion or partially enclosed fuel inlet passage（3）Air inlet side inner chamber, in fuel circulator（8）Side wall on set several it is oblique enter Air flue（9）, oblique air intake duct（9）Through fuel circulator（8）Side wall, with fuel circulator（8）Inner chamber（10）Connection, it is interior Chamber（10）Again with fuel inlet passage（3）Outlet side is connected.

3. industrial furnace heat accumulating type low nitrogen nitride burner according to claim 1, it is characterised in that：In fuel circulator（8） It is upper that rotatable demarcation strip is set（11）, demarcation strip（11）All or part of closing fuel inlet passage（3）Inner chamber, in demarcation strip （11）On, several oblique seams are set（12）, oblique seam（12）Axis, or center line, with fuel inlet passage（3）Axis It is not parallel, relative to fuel inlet passage（3）Axis be obliquely installed, pass through oblique seam（12）By demarcation strip（11）The combustion of both sides Material enters passage（3）Connection.

4. industrial furnace heat accumulating type low nitrogen nitride burner according to claim 1, it is characterised in that：The vortex of air import （6）Cross-sectional area be gradually reduced.

5. according to any one of the claim 1-4 industrial furnace heat accumulating type low nitrogen nitride burners, it is characterised in that：The air Whirlwind import（6）Center and air rotating channel（7）Center decentraction.