CN219083071U

CN219083071U - Low NOX composite fuel burner

Info

Publication number: CN219083071U
Application number: CN202223413941.7U
Authority: CN
Inventors: 刘金金; 朱晓刚; 胡文斌; 冷静
Original assignee: Shandong Shengyang Zhenheng Energy Co ltd
Current assignee: Shandong Shengyang Zhenheng Energy Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-26
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses a low-NOX composite fuel burner which comprises a protective shell, wherein an air inlet pipe penetrates through and is fixedly connected with the middle position of the left side top of the protective shell, a fuel inlet pipe penetrates through and is fixedly connected with the middle position of the top of the protective shell, a fuel outlet is fixedly connected with the bottom of the fuel inlet pipe, a blocking plate is slidingly connected to the middle lower position of the inner wall of the fuel inlet pipe, a connecting rod is fixedly connected to the middle position of the bottom of the blocking plate, an adjusting block is fixedly connected to the bottom of the connecting rod, and a primary air duct is fixedly connected to the middle position of the inner wall of the top of the protective shell. According to the utility model, the problem of overhigh local temperature of the device caused by concentrated combustion of combustion air and coal gas is avoided, so that the generation of NOX during combustion is reduced, meanwhile, a negative pressure area is formed at the center of the device due to the effect of strong air swirling flow, and smoke is sucked to flow back for mixing combustion, so that the combustion is more sufficient, the generation of NOX during combustion is further reduced, and the automatic adjustment of the air output is realized.

Description

Low NOX composite fuel burner

Technical Field

The utility model relates to the technical field of composite burner tips, in particular to a low-NOX composite fuel burner tip.

Background

Low nitrogen oxide combustion technology is a technology that improves combustion equipment or controls combustion conditions to reduce NOx concentrations in combustion exhaust gases. The main factors affecting NOx production during combustion are combustion temperature, residence time of flue gas in the high temperature zone, concentration of various components in flue gas and degree of mixing, and therefore, changing air-fuel ratio, temperature of combustion air, degree of cooling of combustion zone and burner shape design can reduce nitrogen oxide production during combustion. In order to meet the national ecological priority and green development requirements, the NOx emission of the steel rolling heating furnace is effectively reduced, the ultralow NOx emission standard of a combustion system is achieved, the contribution rate of the heating furnace to reducing the atmospheric pollution is improved, and the production cleanliness and the manufacturing greenness are needed. The composite burner is an essential device for industrial production, and can be installed on various heating furnace types.

The burner in the prior art has different structures, and has the common points that after the combustion air inlet pipe and the fuel inlet pipe are mixed in the burner, the combustion air inlet pipe and the fuel inlet pipe are combusted at one time, so that gas is unevenly mixed, flame burns a workpiece, oxidation and overburning are caused, the heat treatment effect of the workpiece is affected, the flame combustion temperature is higher, the generation of NOx is greatly promoted by high-temperature combustion, the NOx can damage ozone layers and other hazards, strict control is needed, and simultaneously, the gas outlet amount of fuel cannot be freely controlled, so that fuel is wasted.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a low-NOX composite fuel burner.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a low NOX composite fuel nozzle, includes the protective housing, protective housing left side top intermediate position runs through and fixedly connected with air-supply line, protective housing top intermediate position runs through and fixedly connected with fuel advances the pipe, fuel advances pipe bottom fixedly connected with fuel outlet, the position sliding connection has the barrier plate down in the middle of the fuel advances the pipe inner wall, barrier plate bottom intermediate position fixedly connected with connecting rod, connecting rod bottom fixedly connected with regulating block, protective housing top inner wall intermediate position fixedly connected with primary air duct, primary air duct outer wall intermediate position fixedly connected with secondary air duct, fuel advances pipe outer wall bottom intermediate position fixedly connected with turbine, protective housing bottom fixedly connected with burner block, the position runs through and fixedly connected with pulse igniter in the middle of the burner block outer wall.

As a further description of the above technical solution:

the left and right sides at the top of the outer wall of the primary air channel are respectively provided with a penetrating primary air inlet.

As a further description of the above technical solution:

the secondary air channel outer wall is provided with a plurality of secondary air inlets that run through, and the secondary air inlet distributes on the secondary air channel for the slope setting, and the tangential of secondary air inlet axis and this axis and secondary air channel body lateral surface crossing department has certain contained angle.

As a further description of the above technical solution:

the top of the blocking plate is provided with a plurality of through holes with different sizes, and the through holes are arranged in the middle of the blocking plate and close to the edge.

As a further description of the above technical solution:

the inner wall of the turbine is fixedly connected with the fuel inlet pipe, and blades of the turbine are fixedly connected with the inner wall of the primary air duct.

As a further description of the above technical solution:

the burner block bottom is provided with the loudspeaker form combustion chamber that runs through, and pulse igniter runs through and stretches into the combustion chamber.

As a further description of the above technical solution:

the fuel outlet is arranged in a horn shape.

The utility model has the following beneficial effects:

1. in the utility model, medium gas is led in through the fuel inlet pipe and forms cyclone flow through the trumpet-shaped fuel outlet, combustion air entering the primary air flue moves downwards through the turbine through the primary air flue and is mixed with gas sprayed out from the fuel outlet in the combustion cavity of the burner block to achieve the condition of stable combustion, the mixed gas is ignited through pulse igniters at the left side and the right side of the burner block, the continuous and uniform mixing and stable combustion of the gas are ensured, the combustion air entering the secondary air flue forms strong cyclone flow through the secondary air inlet and moves downwards, the gas and the air are further mixed under the effect of the strong cyclone flow generated by the secondary air flue, so that the gas can be fully mixed with the combustion air, the problem that the local temperature of the device is too high due to the concentrated combustion of the combustion air and the gas is avoided, the generation of NOX during combustion is reduced, meanwhile, a negative pressure area is formed at the center of the device due to the effect of the strong cyclone flow of the air, the mixed combustion is sucked, the NOX is mixed and combusted in a back way, and the combustion is more fully generated during the combustion, and the smoke is further reduced.

2. According to the utility model, under the action of the regulating block arranged at the outlet of the fuel inlet pipe, coal gas uniformly flows into the air rotational flow in an umbrella-shaped manner, when the flow rate of the coal gas in the fuel inlet pipe is large, the blocking plate is pushed to move downwards, so that the regulating block moves downwards, the distance between the regulating block and the fuel outlet is larger, more coal gas passes through, negative pressure generated during combustion can push the regulating block to move upwards, the distance between the regulating block and the fuel outlet is reduced, the passing coal gas is reduced, automatic regulation of the air outlet is realized, and the fuel is saved.

Drawings

FIG. 1 is a perspective view of a low NOx composite fuel burner in accordance with the present utility model;

FIG. 2 is a front cross-sectional view of a low NOx composite fuel burner in accordance with the present utility model;

FIG. 3 is a schematic diagram of a secondary air duct of a low NOx composite fuel burner according to the present utility model;

FIG. 4 is a schematic view of a primary air duct of a low NOx composite fuel burner according to the present utility model;

FIG. 5 is a schematic view of an adjusting device of a low NOx composite fuel burner according to the present utility model.

Legend description:

1. a protective shell; 2. a burner block; 3. an air inlet pipe; 4. a fuel inlet pipe; 5. a pulse igniter; 6. a primary air duct; 7. a primary air inlet; 8. a secondary air duct; 9. a secondary air inlet; 10. a turbine; 11. a fuel outlet; 12. a blocking plate; 13. a connecting rod; 14. and an adjusting block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-5, one embodiment provided by the present utility model is: a low NOX composite fuel burner comprises a protective shell 1, wherein an air inlet pipe 3 is penetrated through and fixedly connected with the middle position of the left top of the protective shell 1, combustion air enters the device through the air inlet pipe 3, a fuel inlet pipe 4 is penetrated through and fixedly connected with the middle position of the top of the protective shell 1, medium gas is led in through the fuel inlet pipe 4 and is sprayed out through a horn-shaped fuel outlet 11 to form cyclone flow, the bottom of the fuel inlet pipe 4 is fixedly connected with the fuel outlet 11, a blocking plate 12 is slidingly connected with the middle lower position of the inner wall of the fuel inlet pipe 4, a connecting rod 13 is fixedly connected with the middle position of the bottom of the blocking plate 12, an adjusting block 14 is fixedly connected with the bottom of the connecting rod 13, when the flow velocity of gas in the fuel inlet pipe 4 is large, the blocking plate 12 is pushed to move downwards, so that the adjusting block 14 moves downwards, the distance between the adjusting block 14 and the fuel outlet 11 is larger, the air passing through the air inlet is more, the negative pressure generated during combustion can push the regulating block 14 to move upwards, the distance between the regulating block 14 and the fuel outlet 11 is reduced, the gas passing through the air inlet is reduced, the middle position of the inner wall of the top of the protective shell 1 is fixedly connected with the primary air channel 6, part of combustion air enters the primary air channel 6 through the primary air inlet 7, the combustion air entering the primary air channel 6 moves downwards through the primary air channel 6 and passes through the turbine 10 and is mixed with the gas sprayed by the fuel outlet 11 in the combustion cavity of the burner block 2 to achieve the condition of stable combustion, the middle position of the outer wall of the primary air channel 6 is fixedly connected with the secondary air channel 8, the combustion air entering the secondary air channel 8 forms strong rotational flow through the secondary air inlet 9 and moves downwards, the combustion air and the air is sucked to be further mixed with the air under the action of strong rotational flow generated by the secondary air channel 8, simultaneously, air and gas flow are mixed along the surface of the horn-shaped combustion cavity of the burner block 2 towards the outside for combustion, the turbine 10 is fixedly connected to the middle position of the bottom of the outer wall of the fuel inlet pipe 4, the burner block 2 is fixedly connected to the bottom of the protective shell 1, the pulse igniter 5 penetrates through the middle upper position of the outer wall of the burner block 2 and is fixedly connected to the middle upper position of the outer wall of the burner block 2, and the mixed gas is ignited through the pulse igniters 5 on the left side and the right side of the burner block 2, so that continuous and uniform mixing and stable combustion of the gas are ensured.

The left and right sides at the top of the outer wall of the primary air channel 6 are respectively provided with a through primary air inlet 7, a part of combustion air can enter the primary air channel 6 through the primary air inlet 7, the outer wall of the secondary air channel 8 is provided with a plurality of through secondary air inlets 9, the secondary air inlets 9 are obliquely distributed on the secondary air channel 8, a certain included angle exists between the central axis of the secondary air inlets 9 and the tangential direction of the intersection point of the central axis and the outer side surface of the secondary air channel 8 body, combustion air entering the interior of the secondary air channel 8 forms strong rotational flow and moves downwards through the secondary air inlets 9, a plurality of through holes with different sizes are formed at the top of the baffle plate 12, the through holes are arranged in the middle of the baffle plate 12 and close to the edge position, the inner wall of the turbine 10 is fixedly connected with the fuel inlet pipe 4, blades of the turbine 10 are fixedly connected with the inner wall of the primary air channel 6, the bottom of the burner brick 2 is provided with a through horn-shaped combustion cavity, the pulse igniter 5 penetrates and stretches into the combustion cavity, medium gas can be guided by the fuel inlet pipe 4 and forms cyclone flow through the horn-shaped fuel outlet 11, combustion air in the primary air channel 6 is sprayed out, the combustion air in the primary air channel 6 through the horn-shaped fuel outlet 11 is fully mixed with the burner brick 11, and the stable combustion condition is achieved, and the combustion condition of the combustion is achieved in the burner brick is achieved, and the combustion air is fully achieved.

Working principle: when the device is used, firstly, combustion air enters the device through the air inlet pipe 3, after the combustion air enters the protective shell 1 through the air inlet pipe 3, part of the combustion air enters the primary air channel 6 through the primary air inlet 7, the other part of the combustion air enters the secondary air channel 8 through the secondary air inlet 9, medium gas is led in through the fuel inlet pipe 4 and is sprayed out through the horn-shaped fuel outlet 11 to form cyclone flow, the combustion air entering the primary air channel 6 downwards moves through the primary air channel 6 and is mixed with the gas sprayed out by the fuel outlet 11 in the combustion cavity of the burner block 2 to achieve the condition of stable combustion, under the action of the regulating block 14 arranged at the outlet of the fuel inlet pipe 4, the gas is uniformly mixed into the air cyclone flow in an umbrella-shaped manner, the position of the regulating block 14 can be regulated through the blocking plate 12, when the gas flow rate in the fuel inlet pipe 4 is larger, the blocking plate 12 is pushed to move downwards, so that the regulating block 14 moves downwards, the distance between the regulating block 14 and the fuel outlet 11 is larger, the passing gas is more, negative pressure is generated during combustion to push the regulating block 14 to move upwards, the distance between the regulating block 14 and the fuel outlet 11 is reduced, the passing gas is reduced, the mixed gas is ignited by the pulse igniters 5 at the left side and the right side of the burner block 2, continuous and uniform mixing and stable combustion of the gas are ensured, combustion air entering the secondary air channel 8 forms strong rotational flow through the secondary air inlet 9 and moves downwards, the gas and the air are sucked to be further mixed under the action of the strong rotational flow generated by the secondary air channel 8, the gas can be fully mixed with the combustion air, simultaneously, air and gas flow are mixed along the surface of the horn-shaped combustion cavity of the burner block 2 towards the outside for combustion, so that the problem that the local temperature of the device is too high due to concentrated combustion of combustion air and gas is avoided, and therefore NOx generation during combustion is reduced.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A low NOX composite fuel burner comprising a protective shell (1), characterized in that: the utility model discloses a pulse igniter, including protective housing (1), including protective housing (1), fuel inlet tube (4), baffle (12) and pulse igniter (5), protective housing (1), air-supply line (3) are run through and fixedly connected with in left side top intermediate position, protective housing (1) top intermediate position runs through and fixedly connected with fuel inlet tube (4), fuel inlet tube (4) bottom fixedly connected with fuel outlet (11), the lower position sliding connection has baffle (12) in the middle of fuel inlet tube (4) inner wall, baffle (12) bottom intermediate position fixedly connected with connecting rod (13), connecting rod (13) bottom fixedly connected with regulating block (14), protective housing (1) top inner wall intermediate position fixedly connected with primary air duct (6), primary air duct (6) outer wall intermediate position fixedly connected with secondary air duct (8), fuel inlet tube (4) outer wall bottom intermediate position fixedly connected with turbine (10), protective housing (1) bottom fixedly connected with burner block (2), upper position in the middle of burner block (2) outer wall runs through and fixedly connected with pulse igniter (5).

2. A low NOX composite fuel burner according to claim 1, wherein: the left and right sides at the top of the outer wall of the primary air channel (6) are respectively provided with a penetrating primary air inlet (7).

3. A low NOX composite fuel burner according to claim 1, wherein: the outer wall of the secondary air channel (8) is provided with a plurality of secondary air inlets (9) which penetrate through, the secondary air inlets (9) are obliquely distributed on the secondary air channel (8), and a certain included angle exists between the central axis of the secondary air inlets (9) and the tangential direction of the intersection point of the central axis and the outer side face of the secondary air channel (8).

4. A low NOX composite fuel burner according to claim 1, wherein: the top of the blocking plate (12) is provided with a plurality of through holes with different sizes, and the through holes are arranged in the middle of the blocking plate (12) and near the edge.

5. A low NOX composite fuel burner according to claim 1, wherein: the inner wall of the turbine (10) is fixedly connected with the fuel inlet pipe (4), and blades of the turbine (10) are fixedly connected with the inner wall of the primary air duct (6).

6. A low NOX composite fuel burner according to claim 1, wherein: the bottom of the burner block (2) is provided with a penetrating horn-shaped combustion cavity, and the pulse igniter (5) penetrates through and stretches into the combustion cavity.

7. A low NOX composite fuel burner according to claim 1, wherein: the fuel outlet (11) is arranged in a horn shape.