CN113803718B - Wall-attached flame gas burner and process - Google Patents

Abstract

The application provides a wall-attached flame gas burner and a process, wherein the burner comprises a shell, refractory bricks, a pilot burner, an internal combustion gas gun and an external combustion gas gun, at least one side wall of the refractory bricks is an inclined wall, the inclined wall is inclined inwards, the external combustion gas gun is arranged on the outer side of the inclined wall, a mixing channel is arranged on the inclined wall, the outer side and the inner side of the refractory bricks are communicated by the mixing channel, a mixed fuel nozzle is arranged on the external combustion gas gun, an inclined boss is arranged in the refractory bricks, and fuel sprayed by the mixed fuel nozzle is sprayed on the inclined boss to flow in a dispersed manner after passing through the mixing channel. According to the application, through the arrangement of the mixing channel and the inclined boss, the fuel gas injected into the refractory brick by the external fuel gas gun through the mixing channel changes the air flow direction on the inclined boss, so that the effect of stable ignition is realized, and meanwhile, part of flue gas can be introduced into the refractory brick by the mixing channel, so that the flame temperature in the refractory brick is reduced, and NOx generated by overhigh temperature in the refractory brick is avoided.

Description

Wall-attached flame gas burner and process

Technical Field

The application relates to the technical field of energy-saving combustion technology and environmental protection, in particular to a wall-attached flame gas burner and a process.

Background

The traditional most wall-attached combustors are poor in adaptability, easy to take off fire, long in flame, poor in wall-attached effect, difficult to adjust on the distribution proportion of a plurality of groups of spray heads for fuel classification, and unfavorable for inhibiting the NOx production effect after adjusting the power of the combustors according to working conditions.

Most flames of the traditional wall-attached burner are too concentrated, so that the temperature distribution in the burner is uneven, the phenomenon of exceeding NOx or CO is easy to occur, and under the current situation, along with the continuous improvement of the national requirements on environmental emission, low-carbon economy, energy conservation and consumption reduction, the wall-attached flame gas burner with high-efficiency combustion, uniform radiation temperature and low pollution emission needs to be developed to solve the problems.

In view of this, the present application has been made.

Disclosure of Invention

The application solves the problems that in the prior art, the wall attaching effect of flame of the wall attaching burner is poor, the temperature distribution is uneven, and the phenomenon of exceeding NOx or CO easily occurs.

In order to solve the problems, the application provides a wall-attached flame gas burner, which comprises a shell, refractory bricks, a pilot lamp, an internal combustion gas gun and an external combustion gas gun, wherein the refractory bricks are arranged at the top of the shell, the interiors of the shell and the refractory bricks are hollow and form a combustion air channel, one end of the pilot lamp penetrates through the bottom of the shell and stretches into the refractory bricks, one end of the internal combustion gas gun penetrates through the bottom of the shell and stretches into the refractory bricks, at least one side wall of the refractory bricks is an inclined wall, the inclined wall is inclined inwards, a contracted air channel outlet is formed at the top of the refractory bricks, the external combustion gas gun is arranged at the outer side of the inclined wall, a mixing channel is arranged on the inclined wall, the mixing channel is communicated with the outer side and the inner side of the refractory bricks, a mixed fuel nozzle is arranged on the external combustion air gun and corresponds to the mixing channel, an inclined boss is arranged in the interior of the refractory bricks and corresponds to the mixing channel, the inclined boss extends upwards towards the direction away from the mixing channel, and the fuel is sprayed out of the mixing channel through the inclined boss after being sprayed out of the mixing channel.

Through the setting of mixing channel, mixed fuel nozzle and inclined plane boss for outer gas gun spun fuel can directly get into inside the firebrick, ignites through the pilot burner, and guide flame upward movement under the effect of inclined plane boss, make it remove the top of firebrick and be used for igniting outside fuel gas, play good ignition effect, simultaneously, because mixing channel's setting, the fuel gas of injection inside the firebrick can bring into a part flue gas, thereby reduce the inside flame temperature of firebrick, make it possess temperature regulation's effect, can restrain NOx and CO's production effectively.

Further, the pilot lamp is arranged below the inclined wall.

The setting makes the flame of pilot burner spun edge spread on the inside wall of inclined wall to the fuel gas in the resistant firebrick of being convenient for overall ignites, avoids appearing burning insufficient condition that produces CO.

Further, a top plate extending to opposite sides is arranged at the top end of the inclined wall, a fire gathering groove is formed in the connecting position of the inner wall of the inclined wall and the top plate, a plurality of ignition grooves are formed in the top plate, and the ignition grooves penetrate through the upper end face and the lower end face of the top plate.

The outer side of the inclined wall is an outer gas attachment surface, the inner side of the inclined wall is an inner gas attachment surface, the fire gathering groove is arranged at the joint of the inner gas attachment surface and the top plate, in this case, flames rising upwards along the inner gas attachment surface can be converged at the position of the fire gathering groove, a high-temperature area with low-speed flow is formed in the inner part of the fire gathering groove, so that the fire is formed into a heat source, flames propagating in combustible gas are easier to form due to the existence of the heat source, the flames are ejected from the fire igniting groove, and stable igniting flames are formed at the top of the refractory brick, so that complete combustion of smoke is realized, and CO generated by incomplete combustion caused by unstable igniting is avoided.

Further, the plurality of ignition grooves are arranged on the top plate at intervals.

The device is favorable for dividing the pilot flame and then spraying out, so that a plurality of stable pilot points are formed, complete combustion of smoke is realized, and the generation amount of pollutants is reduced.

Further, the mixing channel is arranged in a venturi tube shape or a horn shape, and one end with a larger inner diameter is arranged at the outer side of the inclined wall.

This setting can be in when spraying the fuel to the firebrick inside the one end that the mixing channel is close to the firebrick outside forms stable low pressure zone on the one hand, is favorable to introducing the outside flue gas inside the firebrick for reduce the flame temperature of firebrick inside, on the other hand, the mixing channel that contracts gradually helps the mixture of fuel gas and flue gas, helps realizing the complete combustion of flue gas, avoids producing the pollutant.

Further, the refractory bricks comprise a first refractory brick module, a second refractory brick module and a third refractory brick module, the second refractory brick module comprises a second base, an inclined boss and a through hole are arranged on the second base, the through hole is used for forming a combustion air channel, a pilot lamp accommodating groove is further formed in the second base, and the pilot lamp accommodating groove is used for arranging the pilot lamp; the first refractory brick module comprises a first base, the first base is arranged on the second base in a matched mode, an inclined wall is arranged on the first base, a top plate is arranged at the top end of the inclined wall, first side walls are arranged at two ends of the inclined wall, and the first side walls are used for being assembled with the third refractory brick module in a matched mode; the third refractory brick module comprises a third refractory brick main body and third side walls arranged at two ends of the third refractory brick main body, wherein the third side walls are used for being assembled with the first refractory brick module in a matching way.

The arrangement simplifies the production process of the refractory brick, can obviously reduce the production cost of the refractory brick and improves the production efficiency of the refractory brick.

Further, a positioning assembly structure is arranged between the third side wall and the first side wall and/or the top plate, and the positioning assembly structure is used for quickly assembling the refractory bricks.

The positioning assembly structure comprises a convex block and a concave table which are mutually overlapped and matched, and the first refractory brick module and the third refractory brick main body are matched and assembled through overlapping during assembly.

Further, the outer gas gun is further provided with a wall-attached fuel nozzle which sprays fuel gas obliquely along the outer wall surface of the inclined wall.

The wall-attached fuel nozzle and the mixed fuel nozzle are arranged on the outer fuel gun in a concentrated mode, the problem of ignition and fuel supply of the combustor can be solved through the arrangement of the outer fuel gun, the number of the arranged fuel guns is reduced, and the cost is reduced.

The application also discloses a combustion process for the wall-attached flame gas burner, which comprises the following steps:

s1, starting a valve on a fuel line of a pilot lamp to ignite the pilot lamp;

s2, starting a fuel regulating valve of the internal combustion air gun, after forming stable pilot flame at the top of the refractory brick, starting the fuel regulating valve of the external combustion air gun, wherein the fuel sprayed by the external combustion air gun is divided into two paths, one path enters the inside of the refractory brick through a mixing channel, and the other path is ignited by the pilot flame upwards through an inclined wall;

s3, when the temperature in the hearth rises to the design temperature, detecting the emission values of NOx and CO of the burner, and adjusting the fuel duty ratio of the internal combustion air gun and the external combustion air gun according to the emission values;

the fuel ratio adjustment method for the internal combustion air gun and the external combustion air gun comprises the following steps:

closing a fuel valve of the internal combustion air gun and/or opening a fuel valve of the external combustion air gun when the NOx emission amount is detected to be too high;

when the CO emission is detected to be too high, a fuel valve of the internal combustion air gun is opened, and/or a fuel valve of the external combustion air gun is closed.

When the emission amount of NOx is high, the temperature in the hearth is too high, the fuel amount of the internal combustion air gun is reduced, and/or the fuel amount of the external combustion air gun and the smoke amount brought by the external combustion air gun are increased, so that the temperature in the hearth can be reduced in a targeted manner, and the generation amount of NOx is reduced; when the CO emission is too high, the temperature in the hearth is low, the fuel quantity of the internal combustion air gun is increased, and/or the fuel quantity of the external combustion air gun and the smoke quantity brought by the external combustion air gun are reduced, so that the temperature in the hearth can be increased in a targeted manner, and the CO generation quantity is reduced.

Further, the combustion process further comprises: when the design temperature of the hearth is less than 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 20% and 50%, and the fuel ratio of the external combustion air gun is adjusted between 80% and 50%;

when the design temperature of the hearth is more than or equal to 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 5% and 20%; the fuel ratio of the outer gas gun is adjusted between 95% and 80%.

In a low-temperature state, NOx is generally in a low-generation state, and CO is required to be prevented from being generated in a large amount, so that the fuel ratio provided by the internal combustion air gun is properly increased, the temperature of a hearth can be increased to a certain extent, and the generation of CO is inhibited; at the high temperature, CO is in a lower generation state, at the moment, the fuel ratio of the outer gas gun is properly increased, the temperature in the hearth can be reduced to a certain extent, and the generation of NOx is restrained, so that the burner can keep lower NOx and CO emission in the hearths with different design temperatures according to the fuel ratio adjustment of the inner gas gun and the outer gas gun.

Compared with the prior art, the wall-attached flame gas burner and the process have the following advantages:

through the arrangement of the mixing channel and the corresponding inclined plane boss, the fuel gas entering the refractory brick through the mixing channel is sprayed on the inclined plane boss to change the direction of the air flow, and is ignited by the flame of the pilot lamp in the air flow rising process, so that the effect of stable ignition by only arranging the external gun is realized, and meanwhile, part of flue gas outside the refractory brick can be introduced into the refractory brick through the arrangement of the mixing channel, so that the flame temperature inside the refractory brick is reduced, and NOx generated by overhigh internal temperature of the refractory brick is avoided;

through the arrangement of the fire gathering groove and the ignition groove, flame rising along the internal combustion gas attaching surface is gathered and compressed in the fire gathering groove and then sprayed out of the ignition groove to form a stable ignition source, so that the fuel outside the refractory brick can be continuously and stably ignited, the full combustion of flue gas is ensured, and the generation of CO is reduced;

the pilot burner is arranged at the lower side of the inner gas adhesion surface, so that flame sprayed out of the pilot burner is uniformly diffused on the inner gas adhesion surface, and the uniformity of the internal temperature distribution of the refractory brick is improved;

the first refractory brick module, the second refractory brick module and the third refractory brick module are combined to form refractory bricks, and each refractory brick assembly has a simple structure, is easy to produce and assemble, and reduces the difficulty of integrally producing refractory bricks;

the venturi-shaped mixing channel is arranged, so that a stable low-pressure area is formed in the mixing channel when fuel is injected into the inner space of the refractory brick, flue gas outside the refractory brick is favorably introduced into the refractory brick, and meanwhile, the venturi-shaped mixing channel can promote the premixing of the fuel and the flue gas, effectively reduce the combustion temperature and reduce the generation of pollutants;

through the matched switch of the external gas gun and the internal gas gun in the combustion process, the internal flame temperature of the refractory brick is effectively adjusted to be in a proper temperature range, and the generation of NOx and CO is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of a wall-attached flame gas burner according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a wall-attached flame gas burner according to an embodiment of the present application;

FIG. 3 is a schematic view of the overall structure of a refractory brick according to an embodiment of the present application;

FIG. 4 is a top view of a refractory block according to an embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of a refractory brick according to an embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a refractory brick according to an embodiment of the present application, with a pilot burner, an internal combustion air gun, and an external combustion air gun;

FIG. 7 is a schematic view of the injection direction of fuel gas into the refractory brick through the mixing channel in the wall-attached flame gas burner according to the embodiment of the present application;

FIG. 8 is a schematic perspective view of a first refractory brick module according to an embodiment of the application;

FIG. 9 is a schematic perspective view of another view of a first refractory brick module according to an embodiment of the application;

FIG. 10 is a schematic perspective view of a second refractory brick module according to an embodiment of the application;

FIG. 11 is a schematic perspective view of a second refractory brick module according to an embodiment of the application from another perspective;

FIG. 12 is a schematic perspective view of a third refractory brick module according to an embodiment of the application;

FIG. 13 is a schematic view of a wall-attached flame gas burner according to an embodiment of the present application with a third refractory brick module removed;

FIG. 14 is a schematic view of an outer gas gun nozzle according to an embodiment of the present application;

fig. 15 is a schematic structural view of an internal combustion air gun nozzle according to an embodiment of the present application.

Reference numerals illustrate:

1. an external gas gun; 11. an outer gas gun nozzle; 111. a mixed fuel nozzle; 112. wall-attached fuel nozzles; 2. a pilot lamp; 21. a pilot lamp nozzle; 3. an internal combustion air gun; 31. an internal combustion air gun nozzle; 311. an inner gun fuel nozzle; 4. an air adjusting mechanism; 5. a housing; 6. a furnace bottom lining; 7. a furnace wall; 8. refractory bricks; 81. a first refractory brick module; 811. an inclined wall; 8111. a mixing channel; 8112. an external gas adhesion surface; 8113. an inner gas adhesion surface; 812. a top plate; 8121. a igniting groove; 813. a first base; 8131. an outer gun second accommodation groove; 814. a first sidewall; 815. a fire gathering groove; 82. a second refractory brick module; 821. an inclined boss; 822. a second base; 8221. an outer gun first accommodation groove; 823. a pilot lamp accommodating groove; 824. a through hole; 83. a third refractory brick module; 831. a third refractory brick body; 832. a third sidewall; 9. an air duct inlet; 10. and an air duct outlet.

Detailed Description

The present application will be further described in detail with reference to the drawings and examples, for the purpose of making the objects, technical solutions and advantages of the present application more apparent. It should be understood that the described embodiments are some, but not all, embodiments of the application. The specific embodiments described herein are merely illustrative of the application and are not intended to limit the application.

The following describes a wall-attached flame gas burner and a process according to an embodiment of the present application in detail with reference to the accompanying drawings.

Examples

The present embodiment provides a wall-attached flame gas burner, as shown in fig. 1, 2, 7, and 13, including a housing 5, a fire brick 8, a pilot lamp 2, and an external gas gun 1, wherein the fire brick 8 is disposed at the top of the housing 5, the housing 5 and the fire brick 8 are hollow and form a combustion air channel, one end of the pilot lamp 2 passes through the bottom of the housing 5 and extends into the fire brick 8, at least one side wall of the fire brick 8 is a slant wall 811, the slant wall 811 is inclined inwards, a contracted air channel outlet 10 is formed at the top of the fire brick 8, an external gas gun 1 is disposed outside the slant wall 811, a mixing channel 8111 is disposed on the slant wall 811, the mixing channel 8111 communicates the outside and the inside of the fire brick 8, a mixed fuel nozzle 111 is disposed on the external gas gun 1, the mixed fuel nozzle 111 is disposed corresponding to the mixing channel 8111, a slant boss 821 is disposed inside the fire brick 8, the slant boss 8111 is disposed corresponding to the mixing channel 8111, the fuel is dispersed in the direction of the slant boss 821 and extends towards the mixing channel 821, and the mixing channel 821 is sprayed upwards in the direction of the slant boss 821. In this embodiment, the inward inclination means that the inclined wall 811 is inclined toward the middle of the refractory brick 8, which results in a distance between the inclined wall and the opposite side wall thereof, so as to form a gradually shrinking air duct structure, and it should be noted that the air conditioning mechanism 4 is disposed at the air duct inlet 9 of the combustion air duct, and this structure is generally a stock structure in the prior art, and will not be described herein. In this embodiment, through the arrangement of the mixing channel 8111, the mixed fuel nozzle 111 and the inclined boss 821, the fuel sprayed by the external fuel gun 1 can directly enter the refractory brick 8, be ignited by the pilot burner 2, and guide the flame to move upwards under the action of the inclined boss 821, so that the flame moves to the top end of the refractory brick 8 for igniting the external fuel gas, thereby playing a good role in igniting, the fuel source outside the refractory brick 8 can be achieved, and the wall-attached fuel nozzle 112 can be additionally arranged on the external fuel gun 1, so that the fuel gas can be sprayed along the outer wall surface of the inclined wall 811, and the fuel gas rises to the top end of the refractory brick 8 along with the outer wall of the inclined wall 811 to be ignited; and/or a separate wall-attached gas gun is provided outside the inclined wall 811 to spray wall-attached gas, and the gas is raised along the inclined wall 811 to the top end of the refractory brick 8 and ignited. In this embodiment, stable ignition of fuel gas can be realized under the condition that only the outer gas gun 1 is arranged, so that the setting cost of the inner gas gun 3 is saved, meanwhile, due to the arrangement of the mixing channel 8111, the fuel gas injected into the refractory bricks 8 can bring in a part of flue gas, so that the flame temperature in the refractory bricks is reduced, the flame temperature in the refractory bricks is enabled to have the function of temperature regulation, the generation of NOx and CO can be effectively inhibited, and due to the arrangement of the inclined boss 821, the flame distribution in the refractory bricks 8 is more uniform, the temperatures of all parts are also more uniform, and the generation of pollutants is inhibited, and in some embodiments, the outer gas gun 1 is provided with 2-5.

As one embodiment of the application, the device further comprises an internal combustion air gun 3, one end of the internal combustion air gun 3 penetrates through the bottom of the shell 5 and stretches into the refractory bricks 8, the internal combustion air gun 3 is used for providing stable pilot flames in a starting stage, meanwhile, CO generation caused by the fact that the internal temperature of the refractory bricks 8 is too low in the starting stage is avoided, in the working process of the burner, the fuel quantity of the internal combustion air gun 3 and the external combustion air gun 1 injected into the refractory bricks 8 can be adjusted according to the internal temperature of the refractory bricks 8, so that the internal temperature of the refractory bricks 8 is kept in a reasonable range, when the internal temperature of the refractory bricks 8 is low, the fuel injection quantity of the internal combustion air gun 3 can be properly increased, and/or the gas quantity of the external combustion air gun 1 injected into the refractory bricks 8 is properly reduced, the introduced smoke quantity is reduced, the flame temperature inside the refractory bricks 8 is not too low, CO generation caused by the fact that the internal combustion air quantity of the internal combustion air gun 8 is too low, and the fact that the internal combustion air quantity of the internal combustion air gun 8 is not too high in the specific embodiment is caused by the fact that the NOx generation of the NOx is caused by the fact that the internal combustion air quantity of the internal combustion air gun 2 is not high in the specific embodiment is arranged, and the device is arranged in a certain level of the environment of the NOx.

In this embodiment, as shown in fig. 2 and 13, the pilot burner 2 is disposed below the inclined wall 811, and this arrangement makes the flame emitted from the pilot burner 2 spread along the inner side wall of the inclined wall 811, so as to facilitate the overall ignition of the fuel gas in the refractory bricks 8, and avoid the occurrence of CO due to insufficient combustion.

In some embodiments, as shown in fig. 2, a top plate 812 extending to opposite sides is provided at the top end of the inclined wall 811, a fire collecting groove 815 is provided at a connection portion between the inner wall of the inclined wall 811 and the top plate 812, a plurality of ignition grooves 8121 are provided on the top plate 812, the ignition grooves 8121 penetrate the upper and lower end surfaces of the top plate 812, wherein the opposite sides are side walls corresponding to the inclined wall 811 on the refractory bricks 8, specifically, the outer side surface of the inclined wall 811 is an outer gas attaching surface 8112, the inner side surface of the inclined wall 811 is an inner gas attaching surface 8113, the fire collecting groove 815 is provided at a connection portion between the inner gas attaching surface 8113 and the top plate 812, in this case, flames rising up along the inner gas attaching surface 8113 are converged at the positions of the fire collecting groove 8113, a high temperature region flowing at a low speed is formed inside the ignition grooves 8121, thereby forming a heat source, the presence of the heat source makes the flames spread in the combustible gas more easily, the ignition grooves 8121 are formed from the inner side surfaces, the ignition grooves 8121 are not completely penetrating the top plate 812, and the flame is not completely stable, and the top plate 812 is formed in a stable flame shape, and the flame does not completely penetrate the top plate 812 is formed at the top end of the ignition grooves 812, and the flame is not completely penetrating the top plate 812.

Preferably, a plurality of ignition grooves 8121 are arranged on the top plate 812 at intervals, and the ignition grooves 8121 are formed by dividing and spraying the ignition flame, so that a plurality of stable ignition points are formed, complete combustion of smoke is realized, the generation amount of pollutants is reduced, and in general, one ignition groove 815 is formed, and the number of ignition grooves 8121 is 2-5.

Specifically, as shown in fig. 2, the mixing channel 8111 is in a venturi shape or a trumpet shape, and one end with a larger inner diameter is disposed at the outer side of the inclined wall 811, which can form a stable low pressure area at one end of the mixing channel 8111 close to the outer side of the refractory brick 8 when fuel is injected into the refractory brick 8, so that external flue gas is introduced into the refractory brick 8 to reduce the flame temperature in the refractory brick 8, and on the other hand, the gradually shrinking mixing channel 8111 facilitates the mixing of fuel gas and flue gas, so that the complete combustion of flue gas is realized, and pollutants are avoided, and in some embodiments, the mixing channel 8111 is disposed obliquely upwards from outside to inside, so that the flame formed after the fuel injected into the refractory brick 8 is ignited moves upwards, finally a stable ignition source is formed, the rising stroke of the flame is reduced, and the consumption of the ignition fuel is reduced to a certain extent.

As some examples, the refractory brick 8 is assembled from two or more parts, and the refractory brick 8 in the prior art is generally integrally formed, but in this example, due to the inclined boss 821, the refractory brick 8 is not easy to be demolded when produced by integral forming, and the refractory brick 8 is decomposed into two or more parts, so that the production process is simplified and the production efficiency of the refractory brick 8 is improved.

In one embodiment, as shown in fig. 3-6 and 8-12, the refractory brick 8 includes a first refractory brick module 81, a second refractory brick module 82 and a third refractory brick module 83, and the first refractory brick module 81, the second refractory brick module 82 and the third refractory brick module 83 are assembled to form the refractory brick 8, which simplifies the production process of the refractory brick 8, can significantly reduce the production cost of the refractory brick 8 and improve the production efficiency thereof.

Specifically, as shown in fig. 10 and 11, the second refractory brick module 82 includes a second base 822, a slope boss 821 and a through hole 824 are provided on the second base 822, the through hole 824 is used for forming a combustion air channel, a pilot lamp receiving groove 823 is further provided on the second base 822, the pilot lamp receiving groove 823 is used for providing the pilot lamp 2, it should be noted that, in some embodiments, for positioning and mounting the external gas gun 1, an external gun first receiving groove 8221 is provided on a corresponding position on the second base 822, the second base 822 is provided to help to support the first refractory brick module 81 and the third refractory brick module 83 to form a stable assembly structure, in some embodiments, the slope boss 821 has more than two, and the pilot lamp receiving groove 823 is provided between adjacent slope bosses 821, and this arrangement can effectively utilize the space inside the refractory brick 8, so that the flame ejected from the pilot lamp 2 can easily ignite and disperse on the slope boss, and then the flame of the fuel gas can be ignited stably.

In this embodiment, as shown in fig. 8 and 9, the first refractory brick module 81 includes a first base 813, the first base 813 is cooperatively disposed on the second base 822, an inclined wall 811 is disposed on the first base 813, a top plate 812 is disposed on the top end of the inclined wall 811, and first side walls 814 are disposed on two ends of the inclined wall 811, and the first side walls 814 are configured to be cooperatively assembled with the third refractory brick module 83. In order to position and install the external gas gun 1, the external gun second receiving groove 8131 is provided on the first base 813 at a position corresponding to the external gun first receiving groove 8221, and when the external gun second receiving groove 8131 and the external gun first receiving groove 8221 are installed correspondingly, the first refractory brick module 81 and the second refractory brick module 82 can be assembled simply and quickly.

Specifically, as shown in fig. 12, the third refractory brick module 83 includes a third refractory brick body 831, and third side walls 832 disposed at both ends of the third refractory brick body 831, the third side walls 832 are configured to be assembled with the first refractory brick module 81, in some embodiments, a positioning assembly structure is disposed between the third side walls 832 and the first side walls 814 and/or the top plate 812, and is configured to be used for rapid assembly of the refractory bricks 8, in one embodiment, the positioning assembly structure includes a protrusion and a recess table that are overlapped with each other, and in some preferred embodiments, the upper ends of the faces of the third refractory brick body 831 facing the inclined walls 811 are disposed obliquely upward, and the arrangement appropriately increases the space of the combustion air passages to compensate for the decrease in the internal space of the refractory bricks 8 due to the arrangement of the inclined surfaces 821.

In one embodiment, as shown in fig. 14, a wall-attached fuel nozzle 112 is further provided on the outer gas gun 1, and the wall-attached fuel nozzle 112 injects fuel gas obliquely along the outer wall surface of the inclined wall 811. The wall-attached fuel nozzles 112 and the mixed fuel nozzles 111 are arranged on the outer gas gun 1 in a concentrated mode, the problems of ignition and fuel supply of the burner can be achieved through the arrangement of the outer gas gun 1, the number of the arranged gas guns is reduced, and the cost is reduced.

As shown in fig. 14 and 15, an outer gas gun head 11 is provided to the outer gas gun 1; a pilot lamp nozzle 21 is arranged on the pilot lamp 2; the internal combustion air gun 3 is provided with the internal combustion air gun nozzle 31, the internal combustion air gun nozzle 31 is provided with the internal gun fuel nozzle 311, which are common in the prior art, and are not developed in detail herein, and the present embodiment is different from the prior art in that the mixed fuel nozzle 111 and the wall-attached fuel nozzle 112 are provided on the external air gun nozzle 11, and the beneficial effects of this arrangement are as described above and are not repeated herein.

In addition, in the present embodiment, the fuel gas ejected from the mixed fuel nozzle 111, the inner gun fuel nozzle 311 and the wall-attached fuel nozzle 112 may be the same or different, and when the fuel gas ejected from the mixed fuel nozzle is different, the secondary flat wall-attached flame is formed in the combustion, so that the generation amount of NOx and CO in the flue gas can be significantly reduced, and the mixed fuel nozzle is more suitable as a box-type heating furnace or a burner similar to a furnace.

The construction of the burner with the furnace bottom lining 6, furnace wall 7, etc. on both sides in use belongs to the technical means commonly used in the prior art and will not be described here too much.

Examples

This example provides a combustion process for the wall-mounted flame gas burner described in example 1.

The combustion process specifically comprises the following steps:

s1, starting a valve on a fuel line of a pilot lamp to ignite the pilot lamp;

the specific steps of S1 include: after the burner is installed, the electric igniter is first used to probe the top of the pilot burner nozzle, the head of the igniter is ignited, and simultaneously the valve on the fuel pipe of the pilot burner is opened to make fuel enter the pilot burner. In this embodiment, the pilot burner is placed in the inside inclined plane below of resistant firebrick, and after the flame of pilot burner shower nozzle department was lighted, the pilot burner flame impacted on the inclined plane and is fan-shaped upwards to scatter, and a plurality of ignition grooves that set up in and pass resistant firebrick top subsequently gush into, and then can form stable pilot flame on the fuel route of inside and outside gas gun blowout.

S2, starting a fuel regulating valve of the internal combustion air gun, after forming stable pilot flame at the top of the refractory brick, starting the fuel regulating valve of the external combustion air gun, wherein the fuel sprayed by the external combustion air gun is divided into two paths, one path enters the inside of the refractory brick through a mixing channel, and the other path is ignited by the pilot flame upwards through an inclined wall;

the specific steps of S2 include:

s21: opening an independent regulating valve of the internal combustion air gun, spraying fuel of the internal combustion air gun to the lower part of an upper ignition groove of the refractory brick, igniting by flame of a pilot burner, and then rushing into and passing through a plurality of ignition grooves arranged on the top of the refractory brick so as to form stable ignition flame on a fuel route sprayed by an external combustion air gun;

s22: the independent regulating valve of the external gas gun is opened, the fuel of the external gas gun is sprayed to the refractory brick in two ways, one way of fuel is sprayed to the vicinity of the ignition groove along the outer side surface of the inclined wall of the refractory brick to be ignited, the other way of fuel is sprayed to an inclined surface boss arranged in the refractory brick through a mixing channel on the refractory brick, the fuel is scattered in a planar manner on the inclined surface boss and is ignited by pilot lamp flames and internal gas gun fuel flames, the ignited flames upwards flow into and pass through a plurality of ignition grooves arranged at the top of the refractory brick, and then the other way of external gas gun fuel is ignited again.

The setting is under the support of steady flame of the pilot burner, and the internal combustion air gun fuel forms stable flame after being lighted, and the outer gas gun gets into the fuel of the one way of mixing channel and forms stable flame after being lighted, later gushes into and pass a plurality of ignition grooves that the firebrick top set up along with the flame of pilot burner, and then forms stable pilot flame at the top of firebrick outside inclined plane, sets up and can be after forming stable pilot flame with outer gas gun spun fuel complete ignition, thereby avoids causing the incomplete combustion phenomenon of fuel to lead to the excessive standard of CO emission.

S3, when the temperature in the hearth rises to the design temperature, detecting the emission values of NOx and CO of the burner, and adjusting the fuel duty ratio of the internal combustion air gun and the external combustion air gun according to the emission values;

the fuel ratio adjustment method for the internal combustion air gun and the external combustion air gun comprises the following steps:

closing a fuel valve of the internal combustion air gun and/or opening a fuel valve of the external combustion air gun when the NOx emission amount is detected to be too high;

when the CO emission is detected to be too high, a fuel valve of the internal combustion air gun is opened, and/or a fuel valve of the external combustion air gun is closed.

It should be noted that, in this embodiment, the furnace temperature refers to the furnace temperature of the heating furnace, in the start-up stage, the furnace temperature of the heating furnace will also slowly rise along with the gradual ignition of the burner, and in the start-up working condition of the burner, the internal combustion air gun will continuously keep on to prevent a large amount of CO from being generated due to the low temperature of the furnace, and part of CO will be generated in the heating process, at this time, the detected emission value is inaccurate, so that corresponding detection needs to be performed when the furnace temperature rises to the design temperature, so as to avoid the error value of detection from causing the erroneous adjustment of the valve. The design temperature of the hearth refers to the design working temperature of the hearth and is a preset value.

Under the condition that the emission requirements of the NOx emission quantity and the CO emission quantity are not met, when the emission quantity of the NOx is high, the temperature in the hearth is excessively high, the fuel quantity of the internal combustion air gun is reduced, and/or the fuel quantity of the external combustion air gun and the smoke quantity brought by the external combustion air gun are increased, so that the temperature in the hearth can be reduced in a targeted manner, and the generation quantity of the NOx is reduced; when the CO emission is too high, the temperature in the hearth is low, the fuel quantity of the internal combustion air gun is increased, and/or the fuel quantity of the external combustion air gun and the smoke quantity brought by the external combustion air gun are reduced, so that the temperature in the hearth can be increased in a targeted manner, and the CO generation quantity is reduced.

Specifically, in the embodiment, different fuel ratios of the internal combustion air gun and the external combustion air gun are set according to the design temperature, when the design temperature of the hearth is less than 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 20% and 50%, and the fuel ratio of the external combustion air gun is adjusted between 80% and 50%;

when the design temperature of the hearth is more than or equal to 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 5% and 20%; the fuel ratio of the outer gas gun is adjusted between 95% and 80%.

In a low-temperature state, NOx is generally in a low-generation state, and CO is required to be prevented from being generated in a large amount, so that the fuel ratio provided by the internal combustion air gun is properly increased, the temperature of a hearth can be increased to a certain extent, and the generation of CO is inhibited; at the high temperature, CO is in a lower generation state, at the moment, the fuel ratio of the outer gas gun is properly increased, the temperature in the hearth can be reduced to a certain extent, and the generation of NOx is restrained, so that the burner can keep lower NOx and CO emission in the hearths with different design temperatures according to the fuel ratio adjustment of the inner gas gun and the outer gas gun.

It is to be noted that all terms used for directional and positional indication in the present application, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "low", "head end", "tail end", "center", etc. are merely used to explain the relative positional relationship, connection, etc. between the components in a particular state, and are merely for convenience of description of the present application, and do not require that the present application must be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application should be assessed accordingly to that of the appended claims.

Claims (7)

1. The utility model provides a wall-attached flame gas burner, its characterized in that, includes casing (5), resistant firebrick (8), pilot lamp (2), internal combustion air gun (3) and outer gas gun (1), resistant firebrick (8) set up the top of casing (5), the inside cavity of casing (5) and resistant firebrick (8) forms combustion air passageway, the one end of pilot lamp (2) is passed the bottom of casing (5) stretches into in resistant firebrick (8), resistant firebrick (8) are stretched into to one end of resistant firebrick (3) is passed the bottom of casing (5) stretches into in resistant firebrick (8), at least one lateral wall of resistant firebrick (8) is inclined wall (811), inclined wall (811) inwards slope in resistant firebrick (8)'s top forms shrink wind channel export (10) resistant firebrick (811) are provided with outer gas gun (1) in the outside of inclined wall (811), are provided with mixing channel (8111) on inclined wall (811), mixing channel (8111) will resistant firebrick (8) are stretched into in, at least one lateral wall of resistant firebrick (8) is provided with mixing channel (8111) respectively, the inclined boss (821) is arranged corresponding to the mixing channel (8111), the inclined boss (821) extends obliquely upwards towards a direction away from the mixing channel (8111), and fuel sprayed by the mixed fuel nozzle (111) is sprayed on the inclined boss (821) to flow in a dispersed manner after passing through the mixing channel (8111); the pilot lamp (2) is arranged below the inclined wall (811); a top plate (812) extending to opposite sides is arranged at the top end of the inclined wall (811), a fire gathering groove (815) is arranged at the connecting part of the inner wall of the inclined wall (811) and the top plate (812), a plurality of ignition grooves (8121) are arranged on the top plate (812), and the ignition grooves (8121) penetrate through the upper end face and the lower end face of the top plate (812); the fire brick (8) comprises a first fire brick module (81), a second fire brick module (82) and a third fire brick module (83), the second fire brick module (82) comprises a second base (822), an inclined boss (821) and a through hole (824) are arranged on the second base (822), the through hole (824) is used for forming a combustion air channel, a pilot lamp accommodating groove (823) is further formed in the second base (822), and the pilot lamp accommodating groove (823) is used for arranging the pilot lamp (2); the first refractory brick module (81) comprises a first base (813), the first base (813) is arranged on the second base (822) in a matched mode, an inclined wall (811) is arranged on the first base (813), a top plate (812) is arranged at the top end of the inclined wall (811), first side walls (814) are arranged at the two ends of the inclined wall (811), and the first side walls (814) are used for being assembled with the third refractory brick module (83) in a matched mode; the third refractory brick module (83) includes a third refractory brick body (831) and third side walls (832) disposed at both ends of the third refractory brick body (831), the third side walls (832) being for cooperative assembly with the first refractory brick module (81).

2. The wall-attached flame gas burner of claim 1, wherein a plurality of said ignition slots (8121) are spaced apart on said top plate (812).

3. The wall-attached flame gas burner according to claim 1, wherein the mixing channel (8111) is provided in a venturi-like or horn-like shape, and an end having a larger inner diameter is provided outside the inclined wall (811).

4. The wall-mounted flame gas burner of claim 1, wherein a positioning assembly structure is provided between the third side wall (832) and the first side wall (814) and/or top plate (812), said positioning assembly structure being used for quick assembly of the refractory brick (8).

5. The wall-attached flame gas burner according to any one of claims 1 to 4, wherein a wall-attached fuel nozzle (112) is further provided on the outer gas gun (1), and the wall-attached fuel nozzle (112) injects fuel gas obliquely along an outer wall surface of the inclined wall (811).

6. A combustion process for a wall-attached flame gas burner as claimed in any one of claims 1 to 5, wherein the combustion process comprises:

s1, starting a valve on a fuel line of a pilot lamp to ignite the pilot lamp;

s2, starting a fuel regulating valve of the internal combustion air gun, after forming stable pilot flame at the top of the refractory brick, starting the fuel regulating valve of the external combustion air gun, wherein the fuel sprayed by the external combustion air gun is divided into two paths, one path enters the inside of the refractory brick through a mixing channel, and the other path is ignited by the pilot flame upwards through an inclined wall;

s3, when the temperature in the hearth rises to the design temperature, detecting the emission values of NOx and CO of the burner, and adjusting the fuel duty ratio of the internal combustion air gun and the external combustion air gun according to the emission values;

the fuel ratio adjustment method for the internal combustion air gun and the external combustion air gun comprises the following steps:

closing a fuel valve of the internal combustion air gun and/or opening a fuel valve of the external combustion air gun when the NOx emission amount is detected to be too high;

when the CO emission is detected to be too high, a fuel valve of the internal combustion air gun is opened, and/or a fuel valve of the external combustion air gun is closed.

7. The combustion process of claim 6, wherein the combustion process further comprises: when the design temperature of the hearth is less than 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 20% and 50%, and the fuel ratio of the external combustion air gun is adjusted between 80% and 50%;

when the design temperature of the hearth is more than or equal to 650 ℃, the fuel ratio of the internal combustion air gun is adjusted between 5% and 20%; the fuel ratio of the outer gas gun is adjusted between 95% and 80%.