CN211424382U

CN211424382U - Low NOx wide flat flame burner

Info

Publication number: CN211424382U
Application number: CN201922049175.2U
Authority: CN
Inventors: 潘景新
Original assignee: Hangzhou Zhongjing Technology Co ltd
Current assignee: Hangzhou Zhongjing Technology Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-09-04
Anticipated expiration: 2029-11-22

Abstract

The utility model relates to a wide flat flame nozzle of low NOx belongs to gas nozzle technical field, the industrial furnace kiln of trades such as mainly used steel and iron, coloured, machinery, pottery. The utility model discloses a nozzle shell, burner block, gas seat end cover, gas pipe, burner core, ignition and flame monitoring device, the one end at the nozzle shell is installed to gas seat end cover, the other end at the nozzle shell is installed to the burner block, the burner core is installed in the burner block, the one end and the gas seat end cover of gas pipe are connected, the other end and the burner core of gas pipe are connected, ignition and flame monitoring device all install on the gas seat end cover, and ignition is connected with the burner core. The low-NOx wide flat flame burner can increase the flame coverage, reduce the temperature of combustion flame, reduce NOx emission and improve the heating quality.

Description

Low NOx wide flat flame burner

Technical Field

The utility model relates to a wide flat flame nozzle of low NOx belongs to gas nozzle technical field, the industrial furnace kiln of trades such as mainly used steel and iron, coloured, machinery, pottery.

Background

Most of the existing direct flame burners have gradually-changed beam column structures, the flame of the structure is concentrated, the temperature distribution is uneven, the flame temperature difference is large, the flame radiation surface is small, the generation of NOx can not be effectively controlled, the NOx emission is relatively high, the wide and flat flame burners have the advantages of uniform flame temperature distribution and large flame coverage, the uniformity of the furnace temperature can be improved, the heating quality is improved, the NOx emission is reduced, and the application of the wide and flat flame burners in industrial furnaces tends to be a future development trend.

In view of this, a low NOx emission flat flame gas burner is disclosed in patent application No. 200920090438.8. The comparison file mainly has the defects of uneven temperature distribution, large flame temperature difference, small flame radiation surface and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, increase flame cover face, reduce burning flame temperature, reduce NOx and discharge, improve heating quality's the wide flat flame nozzle of low NOx.

The utility model provides a technical scheme that above-mentioned problem adopted is: this low NOx wide flat flame nozzle, its structural feature lies in: including nozzle shell, burner block, gas seat end cover, gas pipe, burner core, ignition and flame monitoring device, the one end at the nozzle shell is installed to gas seat end cover, the other end at the nozzle shell is installed to the burner block, the burner core is installed in the burner block, the one end and the gas seat end cover of gas pipe are connected, the other end and the burner core of gas pipe are connected, ignition and flame monitoring device all install on gas seat end cover, and ignition is connected with the burner core.

Further, the inside of the burner shell is a shell inner cavity, the inner wall of the burner shell is provided with a heat-insulating fireproof lining, the burner shell is provided with an air inlet flange, and an air inlet cavity is formed between the air inlet flange and the burner shell and communicated with the shell inner cavity.

Further, the burner block is sleeved with a metal protection outer body, the metal protection outer body is provided with a mounting flange, the burner block is mounted on the furnace body through the mounting flange, the burner block is of a cylindrical structure or a square structure, and the burner block is made of a refractory heat-insulating material.

Furthermore, a central cavity channel is arranged in the burner block and is arranged along the axis of the burner block, one end of the central cavity channel is in a cylindrical structure and is communicated with the inner cavity of the shell, the other end of the central cavity channel is in a long and narrow structure or a long and narrow oval structure with semicircular arcs on two sides, a transition section with a gradually changed structure is arranged between one end of the central cavity channel and the other end of the central cavity channel, the burner core is installed at one end of the central cavity channel, the other end of the central cavity channel and the transition section with the gradually changed structure form an air-gas second mixed combustion area, and two sides of the central cavity channel are respectively provided with one cylindrical cavity channel.

Furthermore, the diameter of one end of the central cavity channel is d, and the length of the other end of the central cavity channel is l; when the other end of the central cavity channel is of a narrow and long structure with semicircular arcs on two sides, the width of the other end of the central cavity channel is a, the height of the other end of the central cavity channel is b, when the other end of the central cavity channel is of a long and narrow elliptical structure, the long axis of the other end of the central cavity channel is a, the short axis of the other end of the central cavity channel is b, then 1.5d is larger than or equal to a and larger than d/3, d/4 is larger than or equal to d/12, and 3b is larger than or equal to l and larger than or equal.

Further, be provided with boss and flange mounting hole seat on the gas seat end cover, be provided with gas interface, ignition mounting hole and flame monitoring mounting hole on the boss, the one end and the gas interface intercommunication of gas pipe, ignition and flame monitoring devices install respectively on ignition mounting hole and flame monitoring mounting hole, install the end cover on the flange mounting hole seat.

Further, a boss and a flange mounting hole seat are arranged on the gas seat end cover, a gas interface, an ignition mounting hole and a flame monitoring mounting hole are arranged on the boss, one end of the gas guide pipe is communicated with the gas interface, the ignition device and the flame monitoring device are respectively arranged on the ignition mounting hole and the flame monitoring mounting hole, a high-temperature alloy pipe is arranged on the flange mounting hole seat, a high-temperature alloy pipe nozzle is arranged at one end of the high-temperature alloy pipe, and the high-temperature alloy pipe nozzle is located in the burner block.

Further, the burner core comprises a cylindrical inner cavity, a cylindrical table, a gas nozzle, a cylindrical shell, an end plate and a fixing plate, wherein the cylindrical inner cavity is arranged inside the cylindrical shell, the cylindrical inner cavity is an air-gas first mixed combustion area, the fixing plate is arranged at one end of the cylindrical shell, the end plate is arranged at the other end of the cylindrical shell, the end plate is positioned outside the cylindrical shell, the cylindrical table is arranged at one side of the fixing plate, one end of the gas nozzle is fixed on the cylindrical table, the other end of the gas nozzle is positioned in the cylindrical inner cavity, the fixing plate is provided with a plurality of tubular nozzles and a plurality of air holes, the plurality of tubular nozzles and the plurality of air holes are circumferentially arranged in an array manner, the tubular nozzles and the air holes are arranged in a staggered manner, tubular nozzle channels are arranged in the tubular nozzles, the number of the tubular nozzles is m, and the number of the air holes is, 16 is more than or equal to m and more than or equal to 4, the included angle between the air holes and the cylindrical shell is alpha, and 30 degrees is more than or equal to alpha and more than or equal to 0 degree.

Furthermore, the end plate, the fixing plate, the cylindrical table and the cylindrical shell are of an integral casting structure.

Furthermore, a cylindrical table center hole is formed in the cylindrical table and is arranged in a stepped structure, a fixed plate cavity is arranged on the other side of the fixed plate, the cylindrical table center hole is communicated with the fixed plate cavity through gas holes, the number of the gas holes is n, and 16 is larger than or equal to n and larger than or equal to 4.

Furthermore, a gas jet flow channel is arranged in the gas nozzle, and one end of the gas nozzle is fixed in a central hole of the cylindrical table.

Furthermore, the wall surface of the cylindrical shell is provided with a plurality of shell through holes, the shell through holes are uniformly distributed in an annular shape, the number of the rings is 2-4, the included angle between the axis of each shell through hole and the axis of the cylindrical shell is beta, and the beta is more than or equal to 60 degrees when the angle is 90 degrees.

Furthermore, the end plate is provided with y end plate notches or a plurality of sieve-shaped through holes, wherein y is more than or equal to 4.

Furthermore, the inlet end of the gas jet flow channel is arranged in a cylindrical structure, the outlet end of the gas jet flow channel is in a long and narrow structure or a long and narrow oval structure with semicircular arcs on two sides, and a transition section with a gradually changing structure is arranged between the inlet end and the outlet end of the gas jet flow channel.

Compared with the prior art, the utility model has the advantages of it is following: the low-NOx wide flat flame burner can increase the flame coverage, reduce the temperature of combustion flame, reduce NOx emission and improve the heating quality.

Drawings

Fig. 1 is a schematic structural view of a low NOx wide flat flame burner according to embodiment 1 or 2 of the present invention.

Fig. 2 is a schematic structural view of a low NOx wide flat flame burner according to embodiment 1 or 2 of the present invention.

Fig. 3 is a schematic structural diagram of a low NOx wide flat flame burner of embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a low NOx wide flat flame burner of embodiment 2 of the present invention.

Fig. 5 is a schematic structural view of a burner core according to embodiment 1 or 2 of the present invention.

Fig. 6 is a schematic structural view of a burner core according to embodiment 1 or 2 of the present invention.

Fig. 7 is a left side view structural diagram of a burner core with an end plate notch on an end plate according to embodiment 1 or 2 of the present invention.

Fig. 8 is a left side view structural diagram of a burner core provided with a screen-shaped through hole on an end plate according to embodiment 1 or 2 of the present invention.

Fig. 9 is a schematic structural view of the central cavity passage according to embodiment 1 or 2 of the present invention.

Fig. 10 is a schematic structural view of the central cavity passage according to embodiment 1 or 2 of the present invention.

Fig. 11 is a schematic structural view of a gas jet flow passage according to embodiment 1 or 2 of the present invention.

Fig. 12 is a schematic structural view of a gas jet flow passage according to embodiment 1 or 2 of the present invention.

In the figure: a burner shell 1, a burner block 2, a gas seat end cover 3, a gas conduit 4, a burner core 5, an ignition device 6, a flame monitoring device 7, a furnace body 8, a shell inner cavity 10, a heat-insulating refractory lining 11, an air inlet flange 12, an air inlet cavity 13, a central cavity channel 20, a metal protection outer body 21, a cylindrical cavity channel 22, a mounting flange 23, a gas interface 30, an ignition mounting hole 31, a flame monitoring mounting hole 32 and a boss 33, the high-temperature alloy pipe nozzle comprises a flange mounting hole seat 34, a sealing end cover 35, a high-temperature alloy pipe 36, a high-temperature alloy pipe nozzle 37, a cylindrical inner cavity 50, a cylindrical table 51, a gas nozzle 52, a tubular nozzle 53, a cylindrical shell 54, an end plate 55, a fixing plate 56, a vent hole 57, a cylindrical table central hole 510, a gas hole 511, a fixing plate cavity 512, a gas jet flow channel 520, a tubular nozzle channel 530, a shell through hole 540, an end plate notch 551 and a sieve-shaped through hole 552.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, in the present specification, if there are terms such as "upper", "lower", "left", "right", "middle" and "one", they are used for clarity of description only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered as the scope of the present invention without substantial changes in the technical content.

Example 1 (see FIGS. 1-3, 5-12).

The wide flat flame nozzle of low NOx in this embodiment, including burner housing 1, burner block 2, gas seat end cover 3, gas pipe 4, burner core 5, ignition device 6 and flame monitoring device 7, the one end at burner housing 1 is installed to gas seat end cover 3, the other end at burner housing 1 is installed to burner block 2, burner core 5 is installed in burner block 2, the one end of gas pipe 4 is connected with gas seat end cover 3, the other end and the burner core 5 of gas pipe 4 are connected, ignition device 6 and flame monitoring device 7 are all installed on gas seat end cover 3, and ignition device 6 is connected with burner core 5.

Burner block 2 in this embodiment is installed on furnace body 8, and burner block 2 is cylindrical structure or square structure, and burner block 2 adopts refractory insulation material.

The inside of the burner shell 1 in this embodiment is a shell inner cavity 10, the inner wall of the burner shell 1 is provided with a heat-insulating refractory lining 11, the burner shell 1 is provided with an air inlet flange 12, an air inlet cavity 13 is arranged between the air inlet flange 12 and the burner shell 1, and the air inlet cavity 13 is communicated with the shell inner cavity 10.

That is to say, the burner shell 1 is of a diamond structure, the heat-insulating refractory lining 11 is arranged in the burner shell 1, the inside of the burner shell 1 is a shell inner cavity 10, the burner shell 1 is provided with an air inlet flange 12, the air inlet flange 12 is connected with an air inlet cavity 13, and the air inlet cavity 13 is communicated with the shell inner cavity 10.

In this embodiment, a metal protection outer body 21 is sleeved outside the burner block 2, a mounting flange 23 is mounted on the metal protection outer body 21, a central cavity passage 20 and a burner block passage 22 are arranged in the burner block 2, the burner core 5 is mounted at one end of the central cavity passage 20, a transition section of the central cavity passage 20 and the other end of the central cavity passage are air and gas second mixed combustion areas, and two cylindrical cavity passages 22 are respectively arranged on two sides of the central cavity passage 20.

That is to say, the burner block 2 is provided with a central cavity passage 20 along the central axis, one end of the central cavity passage 20 is cylindrical, one end of the central cavity passage 20 is communicated with the shell inner cavity 10 of the burner shell 1, the other end of the central cavity passage 20 is a long and narrow structure or a long and narrow oval structure with semicircular arcs at two sides, a transition section of a gradual change structure is arranged between one end and the other end of the central cavity passage 20, and 1 cylindrical cavity passage 22 is respectively arranged at two sides of the central cavity passage 20.

That is, one end of the central cavity passage 20 has a diameter d and the other end of the central cavity passage 20 has a length l; when the other end of the central cavity channel 20 is in a narrow and long structure with semicircular arcs at two sides, the width of the other end of the central cavity channel 20 is a, the height of the other end of the central cavity channel 20 is b, and when the other end of the central cavity channel 20 is in a narrow and long elliptical structure, the long axis of the other end of the central cavity channel 20 is a, and the short axis of the other end of the central cavity channel 20 is b, then 1.2d is more than or equal to a and more than d/3, d/4 is more than or equal to b and more than or equal to d/12, and 3b is more.

In this embodiment, the gas holder end cover 3 is provided with a boss 33 and a flange mounting hole seat 34, the boss 33 is provided with a gas interface 30, an ignition mounting hole 31 and a flame monitoring mounting hole 32, one end of the gas conduit 4 is communicated with the gas interface 30, the ignition device 6 and the flame monitoring device 7 are respectively mounted on the ignition mounting hole 31 and the flame monitoring mounting hole 32, and the flange mounting hole seat 34 is provided with a sealing end cover 35.

That is to say, be equipped with boss 33 on the gas seat end cover 3, the cross sectional shape of boss 33 is the rhombus, circular, square, the rhombus is preferred, be equipped with ignition mounting hole 31 and flame monitoring mounting hole 32 on the boss 33 of gas seat end cover 3, ignition 6 installs on gas seat end cover 3 through ignition mounting hole 31, ignition 6 adopts ignition electrode or burning torch, flame monitoring 7 passes through flame monitoring mounting hole 32 to be fixed on gas seat end cover 3, flame monitoring 7 adopts UV ultraviolet monitor, still be equipped with gas interface 30 on the gas seat end cover 3, gas interface 30 is linked together with gas pipe 4.

That is, two sides of the boss 33 of the gas holder end cover 3 are respectively provided with a flange mounting hole seat 34, the inner cavity of the flange mounting hole seat 34 is communicated with the inner cavity 10 of the shell, and the inner cavity of the flange mounting hole seat 34 is coaxial with the cylindrical cavity channels 22 at two sides of the central cavity channel 20.

That is, when the low NOx broad flat flame burner is used as a low temperature burner, one seal cap 35 is mounted on each flange mounting hole seat 34 of the gas seat cap 3.

The burner core 5 in the embodiment comprises a cylindrical inner cavity 50, a cylindrical table 51, a gas nozzle 52, a cylindrical shell 54, an end plate 55 and a fixing plate 56, wherein the cylindrical inner cavity 50 is arranged inside the cylindrical shell 54, the cylindrical inner cavity 50 is a first mixed combustion area of air and gas, the fixing plate 56 is arranged at one end of the cylindrical shell 54, the end plate 55 is arranged at the other end of the cylindrical shell 54, the end plate 55 is positioned outside the cylindrical shell 54, the cylindrical table 51 is arranged at one side of the fixing plate 56, one end of the gas nozzle 52 is fixed on the cylindrical table 51, the other end of the gas nozzle 52 is positioned in the cylindrical inner cavity 50, the fixing plate 56 is provided with a plurality of tubular nozzles 53 and a plurality of vent holes 57, the plurality of tubular nozzles 53 and the plurality of vent holes 57 are all arranged in a circumferential array, the tubular nozzles 53 and the vent holes 57 are arranged in a staggered manner, a tubular nozzle passage 530, the number of the air holes 57 is m-2, 16 is more than or equal to m and more than or equal to 4, the included angle between the air holes 57 and the cylindrical shell 54 is alpha, and alpha is more than or equal to 0 degree at 30 degrees.

That is, 2 circles of circular holes are uniformly arranged around the cylindrical table 51 at the closed end of the burner core 5; wherein 1 circle of circular holes are air holes 57, the number of the air holes 57 is m-2 (16 is more than or equal to m and more than or equal to 4), the included angle between the central axis of the circle of circular holes and the central axis of the cylindrical shell 54 is alpha (30 degrees is more than or equal to alpha and more than or equal to 0 degrees), the number of the other 1 circle of circular holes is m (16 is more than or equal to m and more than or equal to 4), each circular hole is internally provided with a tubular nozzle 53, a tubular nozzle channel 530 of the tubular nozzle 53 is of a circular structure and gradually shrinks from an inlet to an outlet, one end of the tubular nozzle channel 530 is communicated with the shell inner cavity 10, and the other.

That is, one end of the burner core 5 is a closed-structure end plate 55, and the other end is an open-ended cylindrical shell 54; the closed structure end plate 55 is externally provided with a cylindrical table 51; the cylindrical table 51 is provided with a cylindrical stepped central hole 510, n gas holes 511 are uniformly distributed on the periphery of the step of the central hole 510, the number of the gas holes 511 is more than or equal to 16, n is more than or equal to 4, and a gas nozzle 52 is fixed in the central hole 510; the gas jet flow channel 520 of the gas nozzle 52 is a gradual change structure, the inlet end is round, and the outlet end is a long and narrow structure or a long and narrow oval structure with semicircular arcs on two sides; the inlet of the central hole 510 of the cylindrical table is connected and communicated with the inner cavity of the gas conduit 4, the inlets of the n gas holes 511 are also communicated with the inner cavity of the gas conduit 4, the outlets of the n gas holes 511 are all in the cavity 512 of the fixed plate, and the outlet of the cavity 512 of the fixed plate is communicated with the cylindrical inner cavity 50.

That is, the cylindrical housing 54 is placed in the central cavity passage 20 of the burner block 2 with the burner core 5 coaxial with the burner block 2.

The cylindrical table 51 in this embodiment is provided with a stepped central hole 510, the gas nozzle 52 is provided with a gas jet channel 520, the other side of the fixing plate 56 is provided with a fixing plate cavity 512, the cylindrical table central hole 510 is communicated with the fixing plate cavity 512 through gas holes 511, the number of the gas holes 511 is n, and 16 is more than or equal to n and more than or equal to 4.

In this embodiment, the wall surface of the cylindrical shell 54 is provided with a plurality of shell through holes 540, the plurality of cylindrical shell through holes 540 are uniformly distributed in an annular shape, the number of the rings is 2-4, the included angle between the cylindrical shell through hole 540 and the cylindrical shell 54 is β, and 90 ° β is greater than or equal to 60 °.

That is, 2 to 4 circles of casing through holes 540 are uniformly arranged on the cylindrical casing 54 of the burner core 5, the number of the circles is preferably 3, and an included angle between each circle of the cylindrical casing through holes 540 and the central axis of the cylindrical casing 54 is β (90 ° ≧ m ≧ 60 °), and preferably β =90 °.

The end plate 55 in this embodiment is provided with y number of end plate notches 551 or a plurality of screen-like through holes 552, wherein y is greater than or equal to 4.

That is, the end plate 55 is disposed outside the outlet end of the cylindrical casing 54 of the burner core 5, and the end plate 55 has uniform end plate notches 551 or sieve-shaped through holes 552, where the number of the end plate notches 551 is y, and y is greater than or equal to 4.

Specifically, combustion air enters the air inlet cavity 13 from the air inlet flange 12, passes through the inner cavity 10 of the casing, a part of the combustion air enters the central cavity channel 20 of the burner block 2 through the air holes 57 around the cylindrical table 51 at the closed end of the burner core 5, a part of the combustion air enters the central cavity channel 20 of the burner block 2 through the tubular nozzle channels 530 around the cylindrical table 51 at the closed end of the burner core 5, a part of the combustion air enters the annular channel formed between the cylindrical casing 54 of the burner core 5 and the central cavity channel 20 of the burner block 2 and then enters the central cavity channel 20 of the burner block 2 through the casing through hole 540 of the cylindrical casing 54, a part of the combustion air enters the annular passage formed between the cylindrical housing 54 of the burner core 5 and the central cavity passage 20 of the burner block 2 and then directly enters the central cavity passage 20 of the burner block 2 through the end plate notch 551 or the sieve-like through hole 552. The last part of the air enters the furnace through the cylindrical cavity channels 22 on both sides of the central cavity channel 20 of the burner block 2.

After gas enters the gas conduit 4 from the gas interface 30, a part of the gas is sprayed into the central cavity passage 20 of the burner block 2 through the n gas holes 511 in the cylindrical stepped holes of the burner core 5, a part of the gas is sprayed into the central cavity passage 20 of the burner block 2 through the tubular nozzle passage 530, the gas and the air entering the central cavity passage 20 for multiple times are mixed and combusted, and the remaining part of the gas enters the hearth through the central cavity passage 20 of the burner block 2 and is mixed and combusted with the air entering the hearth through the cylindrical cavity passages 22 at two sides of the central cavity passage 20.

Example 2 (see FIGS. 1-2, 4-12).

In this embodiment, the end cover 3 of the gas holder is provided with a boss 33 and a flange mounting hole seat 34, the boss 33 is provided with a gas interface 30, an ignition mounting hole 31 and a flame monitoring mounting hole 32, one end of the gas conduit 4 is communicated with the gas interface 30, the ignition device 6 and the flame monitoring device 7 are respectively mounted on the ignition mounting hole 31 and the flame monitoring mounting hole 32, the flange mounting hole seat 34 is provided with a high-temperature alloy pipe 36, one end of the high-temperature alloy pipe 36 is provided with a high-temperature alloy pipe nozzle 37, and the high-temperature alloy pipe nozzle 37 is located in the burner block 2.

That is to say, there is boss 33 on the gas seat end cover 3, the cross sectional shape of boss 33 is the rhombus, circular, square, the rhombus is preferred, be equipped with ignition mounting hole 31 and flame monitoring mounting hole 32 on the boss 33 of gas seat end cover 3, ignition 6 installs on gas seat end cover 3 through ignition mounting hole 31, ignition 6 adopts ignition electrode or burning torch, flame monitoring 7 passes through flame monitoring mounting hole 32 to be fixed on gas seat end cover 3, flame monitoring 7 adopts UV ultraviolet monitor, still be equipped with gas interface 30 on the gas seat end cover 3, gas interface 30 is linked together with gas pipe 4.

That is, two sides of the boss 33 of the gas holder end cover 3 are respectively provided with a flange mounting hole seat 34, the inner cavity of the flange mounting hole seat 34 is communicated with the inner cavity 10 of the shell, and the inner cavity of the flange mounting hole seat 34 is coaxial with the cylindrical cavity channels 22 at two sides of the central cavity channel 20. The flange mounting hole seat 34 is provided with a high-temperature alloy pipe 36, one end of the high-temperature alloy pipe 36 is provided with a high-temperature alloy pipe nozzle 37, and the high-temperature alloy pipe nozzle 37 is positioned in the burner block 2.

That is, when the low NOx wide flat flame burner is used as a high temperature burner, a flanged high temperature alloy pipe 36 is respectively installed in the flange installation hole seat 34 on the gas seat end cover 3, the outlet of the high temperature alloy pipe 36 is a high temperature alloy pipe nozzle 37, the high temperature alloy pipe nozzle 37 is arranged in the cylindrical cavity channel 22 at two sides of the central cavity channel 20, and the two high temperature alloy pipes 36 are used as gas channels of the high temperature burner, so that the structure can greatly inhibit NOx generation in a high temperature state and reduce NOx emission.

Specifically, combustion air enters the air inlet cavity 13 from the air inlet flange 12, passes through the inner cavity 10 of the casing, a part of the combustion air enters the central cavity channel 20 of the burner block 2 through the air holes 57 around the cylindrical table 51 at the closed end of the burner core 5, a part of the combustion air enters the central cavity channel 20 of the burner block 2 through the tubular nozzle channels 530 around the cylindrical table 51 at the closed end of the burner core 5, a part of the combustion air enters the annular channel formed between the cylindrical casing 54 of the burner core 5 and the central cavity channel 20 of the burner block 2 and then enters the central cavity channel 20 of the burner block 2 through the casing through hole 540 of the cylindrical casing 54, a part of the combustion air enters the annular passage formed between the cylindrical housing 54 of the burner core 5 and the central cavity passage 20 of the burner block 2 and then directly enters the central cavity passage 20 of the burner block 2 through the end plate notch 551 or the sieve-like through hole 552. The combustion air finally enters the furnace through the central cavity channels 20.

After 0% -30% of gas enters the gas conduit 4 from the gas interface 30, a part of the gas is sprayed into the central cavity passage 20 of the burner block 2 through n gas holes 511 in the cylindrical stepped holes of the burner core 5, a part of the gas is sprayed into the central cavity passage 20 of the burner block 2 through the tubular nozzle passage 530, the gas and the air which enter the central cavity passage 20 for multiple times are mixed and combusted, and the rest most of the air enters the hearth through the central cavity passage 20 of the burner block 2 and 70% -100% of the gas enters the hearth from the high-temperature alloy metal tubes 36 in the flange mounting hole seats 34 on the gas base end covers 3 through the burner block passages 22 on two sides of the central cavity passage 20 of the burner block 2 and is mixed and combusted.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the patent idea of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a wide flat flame nozzle of low NOx which characterized in that: including burner housing (1), burner block (2), gas seat end cover (3), gas conduit (4), burner core (5), ignition (6) and flame monitoring device (7), the one end in burner housing (1) is installed in gas seat end cover (3), the other end in burner housing (1) is installed in burner block (2), burner core (5) are installed in burner block (2), the one end and the gas seat end cover (3) of gas conduit (4) are connected, the other end and the burner core (5) of gas conduit (4) are connected, ignition (6) and flame monitoring device (7) are all installed on gas seat end cover (3), and ignition (6) are connected with burner core (5).

2. The low NOx wide flat flame burner of claim 1, wherein: the burner is characterized in that a shell inner cavity (10) is formed in the burner shell (1), a heat-insulating refractory lining (11) is arranged on the inner wall of the burner shell (1), an air inlet flange (12) is installed on the burner shell (1), an air inlet cavity (13) exists between the air inlet flange (12) and the burner shell (1), and the air inlet cavity (13) is communicated with the shell inner cavity (10).

3. The low NOx wide flat flame burner of claim 1, wherein: burner block (2) overcoat is equipped with metal protection ectosome (21), be provided with mounting flange (23) on the metal protection ectosome (21), burner block (2) are installed on furnace body (8) through mounting flange (23), burner block (2) are cylindrical structure or square structure, and burner block (2) adopt refractory insulation material.

4. The low NOx wide flat flame burner of claim 1, wherein: be provided with central cavity passageway (20) in burner block (2) and central cavity passageway (20) sets up along the axis of burner block (2), the one end of central cavity passageway (20) is cylindrical structure setting, and this end and casing inner chamber (10) intercommunication, the other end of central cavity passageway (20) is the long and narrow structure or the long and narrow oval structure of both sides semicircle, be gradual change structure changeover portion between the one end of central cavity passageway (20) to the other end, the one end at central cavity passageway (20) is installed in burner core (5), the other end of central cavity passageway (20) and gradual change structure changeover portion constitute air gas second mixed combustion district, the both sides of central cavity passageway (20) respectively are provided with a cylindrical cavity passageway (22).

5. The low NOx wide flat flame burner of claim 4, wherein: the diameter of one end of the central cavity channel (20) is d, and the length of the other end of the central cavity channel (20) is l; when the other end of the central cavity channel (20) is of a narrow and long structure with semicircular arcs on two sides, the width of the other end of the central cavity channel (20) is a, the height of the other end of the central cavity channel (20) is b, when the other end of the central cavity channel (20) is of a long and narrow elliptical structure, the long axis of the other end of the central cavity channel (20) is a, the short axis of the other end of the central cavity channel (20) is b, then 1.5d is more than or equal to a and more than d/3, d/4 is more than or equal to b and more than or equal to d/12, and 3b is more than or equal.

6. The low NOx wide flat flame burner of claim 1, wherein: be provided with boss (33) and flange mounting hole seat (34) on gas seat end cover (3), be provided with gas interface (30), ignition mounting hole (31) and flame monitoring mounting hole (32) on boss (33), the one end and the gas interface (30) intercommunication of gas pipe (4), ignition (6) and flame monitoring device (7) are installed respectively on ignition mounting hole (31) and flame monitoring mounting hole (32), install end cover (35) on flange mounting hole seat (34).

7. The low NOx wide flat flame burner of claim 1, wherein: be provided with boss (33) and flange mounting hole seat (34) on gas seat end cover (3), be provided with gas interface (30), ignition mounting hole (31) and flame monitoring mounting hole (32) on boss (33), the one end and the gas interface (30) intercommunication of gas pipe (4), ignition (6) and flame monitoring device (7) are installed respectively on ignition mounting hole (31) and flame monitoring mounting hole (32), install superalloy pipe (36) on flange mounting hole seat (34), the one end of superalloy pipe (36) is provided with superalloy pipe spout (37), superalloy pipe spout (37) are located burner block (2).

8. The low NOx wide flat flame burner of claim 1, wherein: the burner core (5) comprises a cylindrical inner cavity (50), a cylindrical table (51), a gas nozzle (52), a cylindrical shell (54), an end plate (55) and a fixing plate (56), wherein the cylindrical inner cavity (50) is arranged inside the cylindrical shell (54), the cylindrical inner cavity (50) is a first air-gas mixed combustion area, the fixing plate (56) is arranged at one end of the cylindrical shell (54), the end plate (55) is arranged at the other end of the cylindrical shell (54), the end plate (55) is positioned outside the cylindrical shell (54), the cylindrical table (51) is arranged at one side of the fixing plate (56), one end of the gas nozzle (52) is fixed on the cylindrical table (51), the other end of the gas nozzle (52) is positioned in the cylindrical inner cavity (50), and the fixing plate (56) is provided with a plurality of tubular nozzles (53) and a plurality of vent holes (57), the plurality of tubular nozzles (53) and the plurality of air holes (57) are arranged in a circumferential array, the tubular nozzles (53) and the air holes (57) are arranged in a staggered manner, tubular nozzle channels (530) are arranged in the tubular nozzles (53), the number of the tubular nozzles (53) is m, the number of the air holes (57) is m-2, 16 is more than or equal to m and more than or equal to 4, an included angle between each air hole (57) and the cylindrical shell (54) is alpha, and 30 degrees is more than or equal to alpha and more than or equal to 0 degree; and/or; the end plate (55), the fixing plate (56), the cylindrical table (51) and the cylindrical shell (54) are of an integral casting structure.

9. The low NOx wide flat flame burner of claim 8, wherein: a cylindrical table center hole (510) is formed in the cylindrical table (51), the cylindrical table center hole (510) is arranged in a stepped structure, a fixing plate cavity (512) is arranged on the other side of the fixing plate (56), the cylindrical table center hole (510) is communicated with the fixing plate cavity (512) through gas holes (511), the number of the gas holes (511) is n, and 16 is more than or equal to n and is more than or equal to 4; and/or; a gas jet flow channel (520) is arranged in the gas nozzle (52), and one end of the gas nozzle (52) is fixed in a central hole (510) of the cylindrical table.

10. The low NOx wide flat flame burner of claim 8, wherein: the wall surface of the cylindrical shell (54) is provided with a plurality of shell through holes (540), the shell through holes (540) are uniformly distributed in an annular shape, the number of the rings is 2-4, an included angle between the axis of the shell through hole (540) and the axis of the cylindrical shell (54) is beta, and the angle is more than or equal to 90 degrees and more than or equal to 60 degrees; and/or; the end plate (55) is provided with y end plate notches (551) or a plurality of screen-shaped through holes (552), wherein y is more than or equal to 4.